Patent Description:
In the process of connecting pipes, it may be necessary to perform a flaring operation on the pipe. At present, the flaring tool used is a split flaring tool. When the split flaring tool is used to flare the port of the pipe, each flaring chip on the split flaring tool will abut against the inner wall of the pipe, so as to realize the flaring of the pipe. However, when the split flaring tool is flaring, there is a gap between two adjacent flaring chips, so that the force acting on the inner wall of the pipe is uneven during flaring, resulting in the uneven force on the inner wall of the pipe, which causes that the roundness of the inner hole of the pipe after flaring is not enough, and many indentations are produced. Examples of flaring tools are disclosed in the following documents: <CIT>, <CIT>, which forms the basis for the preamble of claim <NUM>, <CIT>, <CIT>, <CIT>.

Based on this, it is necessary to provide a pipe flaring device, as for the problem of uneven force on the inner wall of the pipe during flaring.

A pipe flaring device is provided. The pipe flaring device comprises: an installation housing, a transmission mechanism, a flaring bulge ring and an introduction mechanism, wherein the installation housing is provided with a flaring cavity allowing a pipe to be inserted, the introduction mechanism is located in the flaring cavity, the flaring bulge ring is sleeved over the introduction mechanism, the introduction mechanism is connected with the transmission mechanism, the transmission mechanism is configured to drive the introduction mechanism to move in the flaring cavity, the introduction mechanism is configured to extend into the pipe, and the flaring bulge ring is configured for circumferentially abutting against a port of the pipe.

According to the invention, the transmission mechanism comprises a supporting seat, a transmission rod, a force-applying assembly and a connecting assembly, wherein the supporting seat is provided with a guide sleeve, the guide sleeve is installed in the flaring cavity, the supporting seat and the installation housing are installed and cooperated with each other, and the transmission rod has one end which is connected with the force-applying assembly through the connecting assembly, and the other end which passes through the guide sleeve to be connected with the introduction mechanism.

According to the invention, the introduction mechanism comprises a protection cover, a pipe-gripping sleeve and a first elastic abutting member, wherein the pipe-gripping sleeve is connected with the guide sleeve, the first elastic abutting member is movably connected with the pipe-gripping sleeve, a plurality of fixing tooth slots are provided on a side wall of the pipe-gripping sleeve along a circumferential direction of the pipe-gripping sleeve, fixing teeth corresponding to the fixing tooth slots are provided on the first elastic abutting member along a circumferential direction of the first elastic abutting member, the first elastic abutting member is configured for elastically abutting against the transmission rod, and the protection cover is sleeved over the first elastic abutting member.

In one of the embodiments, the introduction mechanism further comprises a first flaring seat, the transmission mechanism further comprises a first fastener, the flaring bulge ring is mounted on the first flaring seat, the first flaring seat is movably sleeved over the guide sleeve, a strip-shaped opening is provided on the guide sleeve in an axial direction of the guide sleeve, a first fixing hole which is fixedly cooperated with the first fastener is provided on the first flaring seat, the transmission rod is provided with a second fixing hole which is fixedly cooperated with the first fastener, the second fixing hole is positionally corresponding to the strip-shaped opening, and the first flaring seat is fixedly cooperated with the transmission rod by means of the first fastener.

In one of the embodiments, the introduction mechanism further comprises a second flaring seat, a plurality of fixing members are arranged on the second flaring seat at intervals along a circumferential direction of the second flaring seat, the supporting seat is provided with an amounting hole allowing the fixing member to pass through, the flaring bulge ring is mounted on the second flaring seat, the second flaring seat is movably sleeved over the guide sleeve, and the fixing member is fixedly cooperated with the connecting assembly.

In one of the embodiments, the introduction mechanism comprises a buffer sleeve, a second elastic abutting member and a buffer ring, wherein the second elastic abutting member is movably connected with the guide sleeve, the second elastic abutting member is configured for elastically abutting against the transmission rod, the buffer sleeve and the buffer ring are both sleeved on the second elastic abutting member, and both the buffer sleeve and the buffer ring are configured to abut against a pipe wall of the pipe.

In one of the embodiments, the pipe flaring device further comprises a first positioning seat, wherein the first positioning seat is installed inside the installation housing, an end surface of the first positioning seat is configured to abut against a port of the pipe, the first positioning seat is provided with a first adapting port allowing the introduction mechanism to pass therethrough, an end of the first positioning seat is provided with a first abutting portion, the installation housing is provided with a second abutting portion that abuts and cooperates with the first abutting portion, wherein after the supporting seat and the installation housing are fixed by sleeving, one surface of the first abutting portion and the supporting seat abut against each other, and the other surface of the first abutting portion and the second abutting portion abut against each other.

In one of the embodiments, the pipe flaring device further comprises a second positioning seat, wherein the second positioning seat is installed inside the installation housing, an end surface of the second positioning seat is configured to abut against a port of the pipe, the second positioning seat is provided with a second adapting port allowing the introduction mechanism to pass therethrough, the second positioning seat is provided with a limiting member, a first thread is provided along a circumferential direction of the installation housing, a second thread is provided along a circumferential direction of the second positioning seat, the supporting seat is provided with a limiting opening adapted to the limiting member, the limiting member passes through the limiting opening along an axial direction of the installation housing and is connected with the connection assembly, and the first thread is threadedly matched with the second thread.

In one of the embodiments, a scale mark hole for measuring a depth position of the second positioning seat in the installation housing is provided along an axial direction of the installation housing.

In one of the embodiments, the force-applying assembly comprises a first force-applying arm, a second force-applying arm, a rotating member and a force transmission member, wherein the first force-applying arm and the second force-applying arm are rotatably cooperated with each other by means of the rotating member, the first force-applying arm is fixedly cooperated with the supporting seat, the first force-applying arm is provided with an assembling hole, and the force transmission member has one end connected with the second force-applying arm, and the other end which is connected with the connecting assembly through the assembling hole.

Meanwhile, when the above-mentioned pipe flaring device is being used, the diameter of the end of the introduction mechanism is determined according to the diameter of the end of the pipe, that is, it ensures that the introduction mechanism can be smoothly inserted into the pipe. Then, according to the flaring requirement, the protruding diameter of the flaring bulge ring on the introduction mechanism is determined, that is, after the flaring bulge ring abuts against the port of the pipe, the size of the port of the pipe can be directly expanded to the preset port size. Further, by adjusting the transmission mechanism, the introduction mechanism and the flaring bulge ring will move toward the direction of inserting into the pipe, and the introduction mechanism will be inserted into the pipe before the flaring bulge ring. The introduction mechanism continues moving after being inserted into the pipe, until the flaring bulge ring is circumferentially abutting against the port of the pipe. At this time, the introduction mechanism moves in the pipe, which can avoid the dislocations of the flaring bulge ring and the port of the pipe. In addition, compared with the traditional split flaring tool, the above-mentioned pipe flaring device utilizes the flaring bulge ring to achieve uniform circumferential abutting against the port of the pipe, and that is, it ensures that the pipe is subjected to uniform force during flaring.

<NUM>, installation housing; <NUM>, flaring cavity; <NUM>, second abutting portion; <NUM>, scale mark hole; <NUM>, transmission mechanism; <NUM>, supporting seat; <NUM>, guide sleeve; <NUM>, strip-shaped opening; <NUM>, assembling hole; <NUM>, limiting opening; <NUM>, rubber ring; <NUM>, transmission rod; <NUM>, adapting seat; <NUM>, force-applying assembly; <NUM>, first force-applying arm; <NUM>, second force-applying arm; <NUM>, rotating member; <NUM>, force transmission member; <NUM>, connecting assembly; <NUM>, first connecting seat; <NUM>, second connecting seat; <NUM>, third connecting seat; <NUM>, mounting slot; <NUM>, first clip; <NUM>, second clip; <NUM>, first spring; <NUM>; second spring; <NUM>, second fastener; <NUM>, third fastener; <NUM>, first fastener; <NUM>, flaring bulge ring; <NUM>, introduction mechanism; <NUM>, protection cover; <NUM>, pipe-gripping sleeve; <NUM>, fixing tooth slot; <NUM>, first elastic abutting member; <NUM>, fixing tooth; <NUM>, first flaring seat; <NUM>, fixing ring; <NUM>, second flaring seat; <NUM>, fixing member; <NUM>, buffer sleeve; <NUM>, second elastic abutting member; <NUM>, buffer ring; <NUM>, first positioning seat; <NUM>, first adapting port; <NUM>, first abutting portion; <NUM>, second positioning seat; <NUM>, second adapting port; and <NUM>, limiting member.

In order to make the above objects, features and advantages of the present application more understandable, the embodiments of the present application will be described in detail below with reference to the drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding on the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art should understand that the technical solutions described in the foregoing embodiments can be modified.

Referring to <FIG> and <FIG>, in one embodiment, the pipe flaring device comprises: an installation housing <NUM>, a transmission mechanism <NUM>, the flaring bulge ring <NUM> and the introduction mechanism <NUM>. The installation housing <NUM> is provided with a flaring cavity <NUM> allowing the pipe to be inserted. The introduction mechanism <NUM> is located in the flaring cavity <NUM>, the flaring bulge ring <NUM> is sleeved over (outside) the introduction mechanism <NUM>. The introduction mechanism <NUM> is connected with the transmission mechanism <NUM>, and the transmission mechanism <NUM> is configured to drive the introduction mechanism <NUM> to move in the flaring cavity <NUM>, the introduction mechanism <NUM> is configured to extend into the pipe, and the flaring bulge ring <NUM> is configured to circumferentially abut against the port of the pipe.

At the same time, when the above-mentioned pipe flaring device is being used, the end size of the introduction mechanism <NUM> is determined according to the diameter of the end of the pipe, that is, it ensures that the introduction mechanism <NUM> can be smoothly inserted into the pipe. Then, according to the flaring requirements, the protruding diameter of the flaring bulge ring <NUM> on the introduction mechanism <NUM> is determined, such that after the flaring bulge ring <NUM> abuts against the port of the pipe, the size of the port of the pipe can be directly expanded to the preset port size. Further, by adjusting the transmission mechanism <NUM>, the introduction mechanism <NUM> and the flaring bulge ring <NUM> will move toward the direction of inserting into the pipe, and the introduction mechanism <NUM> will be inserted into the pipe before the flaring bulge ring <NUM>. After the introduction mechanism <NUM> is inserted into the pipe, the introduction mechanism <NUM> will continue moving until the flaring bulge ring <NUM> circumferentially abuts against the port of the pipe, and at this time, the introduction mechanism <NUM> moves in the pipe, which can avoid the misalignment of the flaring bulge ring <NUM> and the port of the pipe. In addition, compared with the traditional split flaring tool, the above-mentioned pipe flaring device utilizes the flaring bulge ring <NUM> to realize the uniform circumferential abutting against the pipe port, and that is, it ensures uniform force acting on the pipe during flaring.

Referring to <FIG> and <FIG>, in one embodiment, the transmission mechanism <NUM> comprises a supporting seat <NUM>, a transmission rod <NUM>, a force-applying assembly <NUM> and the connecting assembly <NUM>. The supporting seat <NUM> is provided with a guide sleeve <NUM>, and the guide sleeve <NUM> is installed in the flaring cavity <NUM>, and the supporting seat <NUM> and the installation housing <NUM> are installed and cooperated with each other. The transmission rod <NUM> has one end which is connected with the force-applying assembly <NUM> via the connecting assembly <NUM>, and the other end passing through the guide sleeve <NUM> to be connected with the introduction mechanism <NUM>. Referring to <FIG> and <FIG>, the force-applying assembly <NUM> comprises a first force-applying arm <NUM>, a second force-applying arm <NUM>, a rotating member <NUM> and the force transmission member <NUM>, wherein the first force-applying arm <NUM> and the second force-applying arm <NUM> are rotatably cooperated through the rotating member <NUM>, the first force-applying arm <NUM> and the supporting seat <NUM> are fixedly cooperated. The first force-applying arm <NUM> is provided with an assembling hole. One end of the force transmission member <NUM> is connected with the second force-applying arm <NUM>, and the other end of the force transmission member <NUM> is connected with the connecting component <NUM> through the assembling hole.

Specifically, the rotating member <NUM> comprises a connecting rod and a rotating shaft, that is, both ends of the connecting rod realize the rotating cooperation between the rotating member <NUM> and the first force-applying arm <NUM> and the rotating cooperation between the rotating member <NUM> and the second force-applying arm <NUM>, through the rotating shaft. The force transmission member <NUM> is a force transmission post or force transmission rod. The guide sleeve <NUM> is installed on one of end surfaces of the supporting seat <NUM>, and the supporting seat <NUM> and the installation housing <NUM> can be connected and fixed using bolts or screws, and the supporting seat <NUM> and the installation housing <NUM> can also be fixed through snap-fit and snapping groove, or the supporting seat <NUM> and the installation housing <NUM> are movably cooperated with each other.

Further, the connecting assembly <NUM> can comprise a first connecting seat <NUM>, and the first connecting seat <NUM> is connected with the transmission rod <NUM>. In order to ensure the installation stability of the connecting seat and the transmission rod <NUM>, an adapting seat <NUM> can be additionally provided on the transmission rod <NUM>, that is, the first connecting seat <NUM> is sleeved on the adapting seat <NUM>, and at the same time, it can be fixed by means of a second fastener <NUM> (bolt or screw). The first connecting seat <NUM> is provided with a snapping groove, and the end of the force transmission member <NUM> is provided with a snapping ring or a snap-fit adapting to the snapping groove. At this time, the first force-applying arm <NUM> and the supporting seat <NUM> are threadedly fixed. By changing the opening-and-closing angle of the first force-applying arm <NUM> and the second force-applying arm <NUM>, it is achieved that the transmission rod <NUM> moves inside the guide sleeve <NUM>. This is merely one example, e.g., connecting assembly <NUM> can comprise a third fastener <NUM>, a second connecting seat <NUM>, a third connecting seat <NUM>, a first clip <NUM>, a second clip <NUM>, the first spring <NUM> and the second spring <NUM>, wherein the third fastener <NUM> is a bolt or screw. The end of the transmission rod <NUM> is provided with a first connecting thread, and a second connecting thread matched with the first connecting thread is provided on the second connecting seat <NUM>. The transmission rod <NUM> is fixedly cooperated with the second connecting seat <NUM>, and the third connecting seat <NUM> and the second connecting seat <NUM> are fixed through a third fastener <NUM>. The third connecting seat <NUM> is provided with a mounting slot <NUM>, and both the first clip <NUM> and the second clip <NUM> can be installed in the mounting slot <NUM>. After the third connecting seat <NUM> and the second connecting seat <NUM> are installed and fixed, the second connecting seat <NUM> will block openings of two ends of the mounting slot <NUM>. At this time, the first clip <NUM> abuts against one of the ports of the mounting slot <NUM> through the first spring <NUM>. The second clip <NUM> abuts against another port of the mounting slot <NUM> through the second spring <NUM>. The third connecting seat <NUM> is provided with a mounting opening allowing the force transmission member <NUM> to be inserted. After the force transmission member <NUM> is inserted into the third connecting seat <NUM> through the mounting opening, the first clip <NUM> and the second clip <NUM> will elastically abut against the force transmission member <NUM>, thereby realizing the connection and fixation between the connection assembly <NUM> and the force-applying assembly <NUM>.

Referring to <FIG> and <FIG>, in one embodiment, the introduction mechanism <NUM> comprises a protection cover <NUM>, a pipe-gripping sleeve <NUM> and a first elastic abutting member <NUM>. The pipe-gripping sleeve <NUM> is connected with the guide sleeve <NUM>, and the first elastic abutting member <NUM> is movably connected with the pipe-gripping sleeve <NUM>. A plurality of fixing tooth slots <NUM> are arranged on the side wall of the pipe-gripping sleeve <NUM> along the circumferential direction of the pipe-gripping sleeve <NUM>, and the fixing teeth <NUM> corresponding to the fixing tooth slots <NUM> are provided on the first elastic abutting member <NUM> along the circumferential direction of the first elastic abutting member <NUM>. The first elastic abutting member <NUM> is used for elastically abutting against the transmission rod <NUM>, and the protection cover <NUM> is sleeved over the first elastic abutting member <NUM>. Specifically, the protection cover <NUM> is a rigid cover. The first elastic abutting member <NUM> is an elastic cover, or the first elastic abutting member <NUM> comprises a plurality of elastic sheets. In this embodiment, the multiple elastic sheets are spliced around the circumferential direction of the pipe-gripping sleeve <NUM>, and one ends of the multiple elastic sheets are fixed, and the other ends of multiple elastic sheets are inserted into the pipe-gripping sleeve <NUM> and movably connected with the pipe-gripping sleeve <NUM>. When flaring the pipe, the transmission rod <NUM> is inserted into the first elastic abutting member <NUM> through the pipe-gripping sleeve <NUM>, and at this time, the plurality of elastic sheets will elastically expand. The rigid protection cover <NUM> is sleeved over the first elastic abutting member <NUM>, and then the protection cover <NUM> can play the role of protecting the first elastic abutting member <NUM>. In the above-mentioned embodiment, the elastic sheets can be driven by the transmission rod <NUM> to expand elastically, realizing that the fixing teeth <NUM> can protrude from the fixing slots <NUM>, that is, it realizes the circumferential abutting between the fixing teeth <NUM> and the inner wall of the pipe, and ensures that the pipe does not move when the flaring bulge ring <NUM> enters the port of the pipe.

Referring to <FIG> and <FIG>, in one embodiment, the introduction mechanism <NUM> further comprises a first flaring seat <NUM>, the transmission mechanism <NUM> further comprises a first fastener <NUM>, the flaring bulge ring <NUM> is mounted on the first flaring seat <NUM>, and the first flaring seat <NUM> is movably sleeved over the guide sleeve <NUM>. The strip-shaped opening <NUM> is provided on the guide sleeve <NUM> along the axial direction of the guide sleeve <NUM>. The first flaring seat <NUM> is provided with a first fixing hole fixedly cooperated with the first fastener <NUM>. The transmission rod <NUM> is provided with a second fixing hole fixedly cooperated with the first fastener <NUM>, and the second fixing hole is corresponding to the strip-shaped opening <NUM> in position. The first flaring seat <NUM> is fixedly cooperated with the transmission rod <NUM> through the first fastener <NUM>. Specifically, the first fastener <NUM> is a latch. After the first flaring seat <NUM> is sleeved on the guide sleeve <NUM>, the first flaring seat <NUM> is fixedly cooperated with the transmission rod <NUM> through the first fastener <NUM>, and at the same time, the fixing ring <NUM> can be sleeved over a first flaring seat <NUM>, and the fixing ring <NUM> covers the first fastener <NUM>, so as to prevent the first fastener <NUM> from falling off from the first flaring seat <NUM>. The long-side direction of the strip-shaped opening <NUM> is consistent with the movement direction of the transmission rod <NUM>. That is, when the transmission rod <NUM> is moving, the transmission rod <NUM> can drive the first flaring seat <NUM> to move within the opening range of the strip-shaped opening <NUM>, and finally is inserted into the pipe through the first flaring seat <NUM>, and the first flaring seat <NUM> flares the port of the pipe through the flaring bulge ring <NUM>. The above-mentioned embodiment can ensure that the first flaring seat <NUM> moves in the preset direction, so that the first flaring seat <NUM> can enter the pipe more smoothly. In addition, the protection cover <NUM> firstly abuts against the side wall of the pipe, and then the first flaring seat <NUM> is inserted into the pipe for flaring. This embodiment described above increases contact area between the introduction mechanism <NUM> and the pipe, so that the pipe is subjected to more uniform force during flaring.

Referring to <FIG> and <FIG>, in one embodiment, the introduction mechanism <NUM> further comprises a second flaring seat <NUM>. A plurality of fixing members <NUM> are provided on the second flaring seat <NUM> at intervals along the circumferential direction of the second flaring seat <NUM>. The supporting seat <NUM> is provided with a mounting hole <NUM> allowing the fixing member <NUM> to pass through. The flaring bulge ring <NUM> is mounted on the second flaring seat <NUM>. The second flaring seat <NUM> is movably sleeved over the guide sleeve <NUM>. The fixing member <NUM> is fixedly cooperated with the connecting assembly <NUM>. Specifically, the fixing member <NUM> is a protruding strip or a rod body. First, the second flaring seat <NUM> is sleeved over the guide sleeve <NUM>, and then by forming in the supporting seat <NUM> the mounting hole <NUM> allowing the fixing member <NUM> to pass through, it realizes that the second flaring seat <NUM> can pass through the supporting seat <NUM> to be connected with the force transmission mechanism, that is, it realizes the movable cooperation between the second flaring seat <NUM> and the guide sleeve <NUM>. The second flaring seat <NUM> is inserted into the pipe, and the second flaring seat <NUM> uses the flaring bulge ring <NUM> to flare the port of the pipe. The above-mentioned embodiment can ensure that the second flaring seat <NUM> moves in a preset direction, so that the second flaring seat <NUM> can enter the pipe more smoothly.

Referring to <FIG> and <FIG>, in one embodiment, the introduction mechanism <NUM> includes a buffer sleeve <NUM>, a second elastic abutting member <NUM> and a buffer ring <NUM>. The second elastic abutting member <NUM> is movably connected with the guide sleeve <NUM>. The second elastic abutting member <NUM> is used for elastically abutting against the transmission rod <NUM>. The buffer sleeve <NUM> and the buffer ring <NUM> are both sleeved on the second elastic abutting member <NUM>, and the buffer sleeve <NUM> and the buffer ring <NUM> are both used to abut against the pipe wall of the pipe. Specifically, the buffer sleeve <NUM> and the buffer ring <NUM> are flexible resin or rubber. The second elastic abutting member <NUM> is an elastic cover, or the second elastic abutting member <NUM> includes a plurality of elastic sheets. In this embodiment, the plurality of elastic sheets, which are around the guide sleeve <NUM>, are spliced along the circumferential direction thereof. One ends of the plurality of elastic sheets are fixed, and the other ends of the plurality of elastic sheets are inserted into the guide sleeve <NUM> and movably connected with the guide sleeve <NUM>. When the pipe is flared, the transmission rod <NUM> is inserted into the second elastic abutting member <NUM> through the guide sleeve <NUM>, and at this time, the plurality of elastic sheets will be elastically expanded. The buffer sleeve <NUM> and the buffer ring <NUM> are disposed outside the second elastic abutting member <NUM>, that is, the buffer sleeve can be elastically expanded along with the second elastic abutting member <NUM>. The above-mentioned embodiment can prevent the plurality of elastic sheets from directly contacting the pipe wall of the pipe, so as to avoid forming a plurality of ribs on the inner wall of the pipe when the pipe is flared (the existence of the ribs can easily lead to cracking of the pipe). The above-mentioned buffer sleeve <NUM> and buffer ring <NUM> can play a protective effect on the second elastic abutting member. Further, both the buffer sleeve <NUM> and the second abutting member <NUM> can be integrally formed with the guide sleeve <NUM>. That is, when the transmission rod <NUM> moves toward the second abutting member <NUM> inside the guide sleeve <NUM>, the second abutting member <NUM> can be expanded in the circumferential direction under the push of the transmission rod <NUM>, so as to realize the circumferential abutting between the second abutting member <NUM> and the inner wall of the pipe.

Referring to <FIG> and <FIG>, in one embodiment, the pipe flaring device further includes a first positioning seat <NUM>. The first positioning seat <NUM> is installed inside the installation housing <NUM>. The end surface of the first positioning seat <NUM> is used to abut against the port of the pipe. The first positioning seat <NUM> is provided with a first adapting port <NUM> allowing the introduction mechanism <NUM> to pass therethrough. The end of the first positioning seat <NUM> is provided with a first abutting portion <NUM>. The installation housing <NUM> is provided with a second abutting portion <NUM> that is abutted and cooperated with the first abutting portion <NUM>. After the supporting seat <NUM> and the installation housing <NUM> are sleeved and fixed, one of surfaces of the first abutting portion <NUM> abuts against the supporting seat <NUM>, and the other surface of the first abutting portion <NUM> and the second abutting portion <NUM> abut against each other. Specifically, the first abutting portion <NUM> on the first positioning seat <NUM> is an abutting plate or an annular convex ring. The second abutting portion <NUM> of the installation housing <NUM> may be a stepped groove formed directly on the installation housing <NUM>, or a stepped groove formed by making an annular plate inserted inside the installation housing <NUM>. Further, the first positioning seat <NUM> is installed inside the installation housing <NUM>. After the installation housing <NUM> and the supporting seat <NUM> are connected and fixed to each other, one of surfaces of the first abutting portion <NUM> abuts against the supporting seat <NUM>, and another surface of the first abutting portion <NUM> abuts against the second abutting portion <NUM>, thereby realizing that the first positioning seat <NUM> is fixed inside the installation housing <NUM>. At this time, after the pipe is inserted into the flaring cavity <NUM>, the pipe will abut against the end surface of the first positioning seat <NUM>, so that it is realized that the insertion depth of the pipe in the flaring cavity <NUM> is fixed.

Referring to <FIG> and <FIG>, in one embodiment, the pipe flaring device further includes a second positioning seat <NUM>. The second positioning seat <NUM> is installed inside the installation housing <NUM>. The end surface of the second positioning seat <NUM> is used to abut against the port of the pipe. The second positioning seat <NUM> is provided with a second adapting port <NUM> allowing the introduction mechanism <NUM> to pass therethrough. The second positioning seat <NUM> is provided with a limiting member <NUM>. A first thread is provided along the circumferential direction of the installation housing <NUM>, and a second thread is provided along the circumferential direction of the second positioning seat <NUM>. The supporting seat <NUM> is provided with a limiting opening <NUM> adapted to the limiting member <NUM>. The limiting member <NUM> passes through the limiting opening <NUM> along the axial direction of the installation housing <NUM> and is connected to the connecting assembly <NUM>, and the first thread is threadedly matched with the second thread. A scale mark hole <NUM> for measuring the depth position of the second positioning seat <NUM> in the installation housing is provided along the axial direction of the installation housing <NUM>. Specifically, the installation housing <NUM> and the supporting seat <NUM> can rotate relative to each other. For example, a sliding chute is provided on the inner wall of the installation housing, along the circumferential direction of the inner wall of the installation housing <NUM>, and at the same time, a threaded hole corresponding to the sliding chute is provided on the supporting seat <NUM>. Then, a screw or bolt is used to pass through the sliding chute and be inserted into the threaded hole, and at this time, the relative rotation of the installation housing <NUM> and the supporting seat <NUM> can be realized. The limiting member <NUM> is a limiting plate or a limiting rod. After the limiting member <NUM> is inserted into the limiting opening <NUM>, the supporting seat <NUM> can limit the rotation of the second positioning seat <NUM> inside the installation housing <NUM>. Meanwhile, the limiting member <NUM> can change the depth of the limiting member <NUM> inserted into the limiting opening <NUM> along the axial direction of the installation housing <NUM>. At this time, the installation housing <NUM> can be rotatably cooperated with the supporting seat <NUM> (for example, the installation housing <NUM> is directly sleeved outside the supporting seat <NUM>, and meanwhile the installation housing <NUM> can rotate relative to the supporting seat <NUM>, and at the same time, it is also possible that a rubber ring <NUM> is additionally installed between the installation housing <NUM> and the supporting seat <NUM>, to reduce the friction between the installation housing and the supporting seat <NUM>). With the rotation of the installation housing <NUM>, the second positioning seat <NUM> will move relative to the installation housing <NUM> under the cooperation of the first thread and the second thread, thereby changing the distance between the second positioning seat <NUM> and the end of the installation housing <NUM>. That is, the depth of the pipe inserted into the flaring cavity <NUM> can be changed. At the same time, by adding a scale mark hole <NUM> on the installation housing <NUM>, it is possible to effectively learn the specific depth of the pipe inserted into the flaring cavity <NUM>. That is, the above-mentioned embodiment can improve the usability of the pipe flaring device.

In the description of the present application, it should be understood that the orientation or position relationship, indicated by terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", " horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential direction" and the like, are based on the orientation or position relationship shown in the drawings, and only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must be in the particular orientation, or constructed and operated in the particular orientation, and therefore should not be construed as limitations on the present application.

In addition, the terms, "first" and "second", are only used for the purpose of description, and should not be construed as indicating or implying the importance of relativity or implying the number of indicated technical features. Thus, if a feature is defined by "first" or "second", it may expressly or implicitly comprise at least one feature. In the description of the present application, "plurality" means at least two, such as, two, three, etc., unless expressly and specifically defined otherwise. In this application, unless otherwise expressly specified and limited, the terms, "install", "link", "connect", "fix" and the like, should be understood in a broad sense. For example, it can be fixedly connected, detachably connected, or integrally formed. It can be mechanically connected or electrically connected. It can be directly connected or indirectly connected through an intermediate medium or can be internally communicated between two elements or it can be of interaction relationship between two elements, unless otherwise clearly defined. For those ordinarily skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific situation.

In this application, unless expressly stated and defined otherwise, when a first feature is "on" or "under" a second feature, the first and second features may be directly contacted with each other, or the first and second features are indirectly contacted with each other through an intermediate medium. Also, when the first feature is "above", "over" and "on" the second feature, it may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is on the level higher than that of the second feature. When the first feature is "below", "underneath" and "under" the second feature, it may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is on the level lower than that of the second feature.

Claim 1:
A pipe flaring device comprising an installation housing (<NUM>), a transmission mechanism (<NUM>), a flaring bulge ring (<NUM>) and an introduction mechanism (<NUM>), wherein the installation housing (<NUM>) is provided with a flaring cavity (<NUM>) allowing a pipe to be inserted, the introduction mechanism (<NUM>) is located in the flaring cavity (<NUM>), the introduction mechanism (<NUM>) is connected with the transmission mechanism (<NUM>), the transmission mechanism (<NUM>) is configured to drive the introduction mechanism (<NUM>) to move in the flaring cavity (<NUM>), the introduction mechanism (<NUM>) is configured to extend into the pipe, and the flaring bulge ring (<NUM>) is configured for circumferentially abutting against a port of the pipe, wherein the transmission mechanism (<NUM>) comprises a supporting seat (<NUM>), a transmission rod (<NUM>), a force-applying assembly (<NUM>) and a connecting assembly (<NUM>), wherein the supporting seat (<NUM>) is provided with a guide sleeve (<NUM>), the guide sleeve (<NUM>) is installed in the flaring cavity (<NUM>), the supporting seat (<NUM>) and the installation housing (<NUM>) are installed and cooperated with each other, and the transmission rod (<NUM>) has one end which is connected with the force-applying assembly (<NUM>) through the connecting assembly (<NUM>), and the other end which passes through the guide sleeve (<NUM>) to be connected with the introduction mechanism (<NUM>), characterized in that the flaring bulge ring (<NUM>) is sleeved over the introduction mechanism (<NUM>), and that the introduction mechanism (<NUM>) comprises a protection cover (<NUM>), a pipe-gripping sleeve and a first elastic abutting member (<NUM>), wherein the pipe-gripping sleeve (<NUM>) is connected with the guide sleeve (<NUM>), the first elastic abutting member (<NUM>) is movably connected with the pipe-gripping sleeve (<NUM>), a plurality of fixing tooth slots (<NUM>) are provided on a side wall of the pipe-gripping sleeve along a circumferential direction of the pipe-gripping sleeve (<NUM>), fixing teeth (<NUM>) corresponding to the fixing tooth slots (<NUM>) are provided on the first elastic abutting member (<NUM>) along a circumferential direction of the first elastic abutting member (<NUM>), the first elastic abutting member (<NUM>) is configured for elastically abutting against the transmission rod (<NUM>), and the protection cover (<NUM>) is sleeved over the first elastic abutting member (<NUM>).