Connecting valve structure and anesthetic filling system

A connecting valve structure and an anesthetic filling system are provided. When a valve core assembly is in the open state, a pipe and a filling port are in seal fit, besides, the connecting ring, the seal pipe, and the drug guiding pipe are integrated as a whole, when the seal pipe is inserted into or pulled out of the filling port of the evaporator, no BHT exudate occurs. In addition, an inner pipe wall of the seal pipe, a surface of the connecting ring facing towards a first pipe end, and an outer pipe wall of the drug guiding pipe opposite to the seal pipe together form a pressure stabilizing groove which is used to equilibrate pressure in the container and the evaporator during the open state.

TECHNICAL FIELD

The present application relates to technical field of drug feeding structures, and more particularly to a connecting valve structure and an anesthetic filling system.

BACKGROUND ART

An anesthetic filling system is used to cooperate with an evaporator and comprises a container containing an anesthetic and a connecting valve structure with one end fixed at a drug outlet of the container, wherein another end of the connecting valve structure is inserted into a filling port of the evaporator. Generally, in order to ensure the sealing of the connection, an O-shaped ring is sheathed on an end part of the connecting valve structure, and an outer side wall of the connecting valve structure and an inner side wall of the filling port press the O-shaped ring. Due to the work requirement, multiple times of insertion and pulling of connecting valve structure into and out of the filling port of the evaporator are conducted, which further results in abrasion of the O-shaped ring and formation of impurities, besides, such O-shaped ring is generally made from (ethylene propylene diene monomer) EPDM material, during the friction of the insertion and pulling of the O-shaped ring into and out of the filling port, BHT exudate will occur, the BHT exudate will remain in the evaporator and be prone to be oxidized and yellowed in a high temperature state, which may result in trouble to users and make the users unnecessarily worry about the quality of the anesthetic, or even result in panic. In addition, because the O-shaped ring has a great process tolerance of design, which results in greater-insertion force during the insertion of the connecting valve structure into the evaporator, thus being inconvenient for medical staff to operate.

Technical Problem

An object of embodiments of the present application lies in that: in one respect, a connecting valve structure is provided in order to solve the problem in the prior art that the BHT exudate occurs during the friction of the insertion-pull between the filling port of the evaporator and the O-shaped ring, and the BHT exudate is easily oxidized and yellowed at the high-temperature state, and therefore bringing about worry of the users. Because the O-shaped ring has a great process tolerance of the design, which results in that during the insertion of the connecting valve structure into the evaporator, the insertion force increases and is not convenient for the general medical staff to operation.

In a second respect, an anesthetic filling system is provided to solve the problem in the prior art that the insertion-pull force is relatively great during the insertion-pull of the anesthetic filling system into and out of the evaporator, which is not convenient for the medical staff to operate and to solve the technical problem that the sealing effect between the anesthetic filling system and the evaporator is poor.

Technical Solution

In order to solve the above technical problem, the present application adopts the following technical solution:

In a first respect, the present application provides a connecting valve structure configured to connect an evaporator and a container containing an anesthetic so as to introduce the anesthetic to the evaporator, wherein the evaporator is provided with a filling port. The connecting valve structure comprises a drug guiding structure and a valve core assembly. The drug guiding structure comprises: a drug guiding pipe that is provided with a first pipe end configured to form an insertion fit with the filling port and a second pipe end communicating with an inner part of the container, a connecting ring that is integrally connected with an outer pipe wall of the drug guiding pipe and is formed by radially extending the outer pipe wall of the drug guiding pipe outwards, and a seal pipe that is integrally connected to the connecting ring and formed by extending an outer annular surface of the connecting ring towards the filling port of the evaporator. The seal pipe is in seal fit with the filling port when the drug guiding pipe is inserted into the filling port. The valve core assembly has an open state for opening the drug guiding pipe when the drug guiding pipe is inserted into the filling port and a closed state for blocking the drug guiding pipe when the drug guiding pipe is pulled out of the filling port.

In a second respect, the present application further provides an anesthetic filling system configured to connect with the evaporator to introduce the anesthetic to the evaporator. The anesthetic filling system comprises the container and the above-described connecting valve structure. The container comprises a cavity accommodated with the anesthetic and a drug outlet communicating with the cavity, the connecting valve structure is fixed at the drug outlet and in seal fit with the drug outlet.

Advantageous Effect

Compared with the prior art, the connecting valve structure provided by embodiments of the present application has the following advantages: when the valve core assembly is in the open state, that is, when the first pipe end, the connecting ring, and the seal pipe of the drug guiding pipe are all inserted in the filling port of the evaporator, the seal pipe and the filling port are in seal fit, besides, the connecting ring, the seal pipe, and the drug guiding pipe are integrated as a whole, in this way, when the seal pipe is inserted into or pulled out of the filling port of the evaporator, no BHT exudate occurs, that is, the O-shaped ring is excluded, and the yellowing of the anesthetic caused by the BHT exudate is completely solved, thereby enabling the user to use the drug more confidently. Furthermore, an inner pipe wall of the seal pipe, a surface of the connecting ring facing towards the first pipe end, and an outer pipe wall of the drug guiding pipe opposite to the seal pipe together form a pressure stabilizing groove which is used to equilibrate pressure in the container and the evaporator during the open state. The pressure stabilizing groove has functions in three respects: first, when the drug guiding structure is gradually inserts into the filling port of the evaporator, since both the evaporator and the container are sealed containers, internal air pressure gradually increases during the gradual insertion, while the pressure stabilizing groove can bear a part of the air pressure, thereby equilibrating the internal air pressure; second, by the arrangement of the pressure stabilizing groove, during the insertion of the drug guiding structure into the filling port, insertion difficulty due that the internal air pressure is greater than the atmospheric pressure will not occur, much less the difficulty in pulling out the drug guiding structure, thereby effectively decreasing the insertion-pull force between the drug guiding structure and the evaporator and being convenient for medical staff to operate; and third, when a part of the air pressure is borne by the pressure stabilizing groove, the inner pipe wall of the seal pipe has the trend to expand outwards as being oppressed by the internal air pressure, which further enhances the attachment tightness between the seal pipe and the filling port, thereby improving the sealing effect.

The anesthetic filling system provided by embodiments of the present application has the following advantages: when the above-described connecting valve structure is applied to the anesthetic filling system, the insertion-pull force between the connecting valve structure and the evaporator is effectively decreased, which is convenient for the medical staff to operate, and further improve the sealing property between the connecting valve structure and the drug filling system, thereby improving the transferring efficiency of the anesthetic.

Reference numerals in the drawings are listed as follows:

MODE FOR INVENTION

In order to make the purposes, technical solutions, and advantages of the present application clearer and more understandable, the present application will be further described in detail hereinafter with reference to the accompanying drawings and embodiments. It should be understood that the embodiments described herein are only intended to illustrate but not to limit the present application.

It should be noted that when an element is described as “fixed” or “arranged” on/at another element, it means that the element can be directly or indirectly fixed or arranged on/at another element. When an element is described as “connected” to/with another element, it means that the element can be directly or indirectly connected to/with another element.

It should also be understood that the same or similar reference numerals in the accompanying drawings of the embodiments of the present application correspond to the same or similar parts; in the description of the present application, it should be understood that if there are terms like “upper”, “lower”, “left”, “right”, etc., indicated directions or position relations are based on directions or positions presented in the drawings, and these terms are merely for the purpose of facilitating the description of the present application and simplified description, rather than indicating or implying that the device or element must have the specific directions and constructed or operated in specific directions. Thus, terms concerning to description of the position relation in the drawings are for illustrative purposes only but not to be understood as limiting of the scope of the present application, and the specific meaning of the above terms can be understood by one of ordinary skill in the art according to the specific conditions.

It should be understand that terms like “first” and “second” are only used for the purpose of description, and will in no way be interpreted as indication or hint of relative importance or implicitly indicate the number of the referred technical features. Thus, the features prefixed by “first” and “second” will explicitly or implicitly represent that one or more of the referred technical features are included. In the description of the present application, “multiple”/“a plurality of” refers to the number of two or more than two, except for clear and particular restriction.

Please refer toFIGS. 1-5, the present application provides a connecting valve structure, which is configured to connect an evaporator5and a container6containing an anesthetic in order to introduce the anesthetic to the evaporator5, and the evaporator5is provided with a filling port51; it should be noted that the connecting valve structure1is not limited to be used in the drug filling system, the connecting valve structure1can also be selected when other liquids requires to be sealed and transferred to another container6. It should be explained that the connecting valve structure1is primarily applied in transferring desflurane, which is one kind of anesthetics and has a boiling point of 22.8° C., approaching the room temperature, and it is therefore indicated that a part of the desflurane presents in a gas state in the room temperature, the desflurane therefore should be contained in a specialized evaporator for use. The connecting valve structure1comprises a drug guiding structure100and a valve core assembly200. The drug guiding structure100comprises: a drug guiding pipe110that is provided with a first pipe end111configured to be in insertion fit with the filling port51and a second pipe end112communicating with an inner part of the container6, a connecting ring120that is integrally connected with an outer pipe wall of the drug guiding pipe110and is formed by radially extending the outer pipe wall of the drug guiding pipe outwards, and a seal pipe130that is integrally connected to the connecting ring120and formed by extending an outer annular surface of the connecting ring120towards the filling port51of the evaporator5. The seal pipe130is in seal fit with the filling port51when the drug guiding pipe110is inserted into the filling port51. The valve core assembly200has an open state for opening the drug guiding pipe110when the drug guiding pipe110is inserted into the filling port51and a closed state for blocking the drug guiding pipe110when the drug guiding pipe110is pulled out of the filling port51.

In this embodiment, when the valve core assembly200is in the open state, that is, when the first pipe end111, the connecting ring120, and the seal pipe130of the drug guiding pipe110are all inserted into the filling port51of the evaporator5, the seal pipe130and the filling port51are in seal fit, besides, the connecting ring120, the seal pipe130, and the drug guiding pipe110are integrated as a whole, in this way, when the seal pipe130is inserted into or pulled out of the filling port51of the evaporator5, no BHT exudate occurs, that is, the O-shaped ring is deleted, and the yellowing of the anesthetic resulted from the BHT exudate is completely solved, thereby enabling the user to use the drug more confidently. Furthermore, an inner pipe wall of the seal pipe130, a surface of the connecting ring120facing towards the first pipe end111, and an outer pipe wall of the drug guiding pipe110opposite to the seal pipe130together form a pressure stabilizing groove101which is used to equilibrate pressure in the container6and the evaporator5during the open state. The pressure stabilizing groove101has functions in three respects: first, when the drug guiding structure100is gradually inserts into the filling port51of the evaporator5, since both the evaporator5and the container6are sealed containers, internal air pressure gradually increases during the gradual insertion, while the pressure stabilizing groove101can bear a part of the air pressure, thereby equilibrating the internal air pressure; second, by the arrangement of the pressure stabilizing groove101, during the insertion of the drug guiding structure100into the filling port51, insertion difficulty due that the internal air pressure is greater than the atmospheric pressure will not occur, much less the difficulty in pulling out the drug guiding structure100, thereby effectively decreasing the insertion-pull force between the drug guiding structure100and the evaporator5and being convenient for medical staff to operate; and third, when a part of the air pressure is borne by the pressure stabilizing groove101, the inner pipe wall of the seal pipe130has the trend to expand outwards or expand as being oppressed by the internal air pressure, which further enhances the attachment tightness between the seal pipe130and the filling port51, thereby improving the sealing effect.

Please refer toFIGS. 2-5, further, the drug guiding structure100further comprises a sealing protection ring140that is integrally connected to an outer pipe wall of the seal pipe130and is formed by radially extending the outer pipe wall of the seal pipe130outwards, a shape of a cross section of the sealing projection ring140has a convex curve that is convex to a direction away from the seal pipe130. In this embodiment, the convex curve is an arc. The sealing projection ring140has an arc surface141. The seal pipe130and the sealing projection ring140together form a sealing structure that is in seal fit with the filling port51in the open state.

In this embodiment, because inclining situations inevitably occur during the insertion fit between the drug guiding structure100and the filling port51of the evaporator5, the arrangement of the arc surface141is able to prevent stuck phenomenon even the drug guiding structure100is inclined to any direction, thus ensuring fluent insertion fit and improving the efficiency of the insertion fit.

Please refer toFIGS. 2-3, further, the drug guiding structure100adopts a drug guiding structure100that is formed by polyamide (PA) plastic materials. In this way, the accuracy of the tolerance for the injection mold ensures the stability of the insertion-pull force, which further decreases the insertion-pull force between the drug guiding structure100and the evaporator5, and further improves the processing efficiency of the drug guiding structure100.

Please refer toFIGS. 2-5, further, the drug guiding structure100further comprises a support base150that is connected to the outer pipe wall of the drug guiding pipe110and is formed by radially extending the outer pipe wall of the drug guiding pipe110outwards. The support base150is located at an end part of the drug guiding pipe110away from the seal pipe130and abuts against the evaporator5during the open state. In this way, excess insertion of the drug guiding structure100into the filling port51is effectively avoided.

Please refer toFIGS. 2-3, further, the valve core assembly200comprises a push member210, a sealing structural member220, an elastic member230, and a support240that is provided inside the container6. The support240is fixed at the second pipe end112, the support240has an open cavity241and at least one perfusion mouth242communicating with the open cavity241, the second pipe end112and the sealing structural member220are both located inside the open cavity241, the elastic member230drives the sealing structural member220to move towards the second pipe end112under the action of an elastically restoring force thereof in order to block an opening of the second pipe end112, the push member210is located inside a cavity of the drug guiding pipe110, the push member210is exerted with a force from the evaporator5towards the second pipe end112during the open state in order to overcome the elastically restoring force of the elastic member230and push the sealing structural member220therefore removing the blocking between the sealing structural member220and the second pipe end; and the drug guiding pipe110and the push member210together form a drug guiding channel for allowing the anesthetic to pass through.

Please refer toFIGS. 2-3, the drug guiding channel201comprises a drainage chamber202and a diversion chamber203for allowing the anesthetic to be fluently introduced to the filling port51of the evaporator5.

Specifically, the push member210comprises a push rod211and at least two flow guide plates212connected with a side wall of the push rod211, one end of the push rod211is supported by the sealing structural member220, the at least two flow guide plates212are both located on a periphery of the push rod211and extend along a length direction of the push rod211; any adjacent two flow guide plate212, a part of the sidewall of the push rod211that is located between the two flow guide plates212, and a part of an inner pipe wall of the drug guiding pipe110that is located between the two flow guide plates212together form a drainage chamber202for allowing the anesthetic to pass through. In this way, a contact area between the push member210and the cavity of the drug guiding pipe110is minimized, thus reducing the abrasion between the cavity of the drug guiding pipe110and the push member210.

Particularly, the diversion chamber203that allows the anesthetic to pass through penetrates through one end of the push member210facing the filling port51and the other end of the push member210away from the filling port51.

As shown inFIGS. 2-3, further, the valve core assembly200further comprises an annular first seal shim250, and the first seal shim250is made from ethylene-vinyl acetate copolymer (EVA) material and fixed on a surface of the sealing structural member220that faces the second pipe end112therefore being pressed between the sealing structural member220and the second pipe end112during the closed state. In this way, the sealing property of the opening of the second pipe end112is improved.

Please refer toFIGS. 2-3, and 5, further, the drug guiding structure100further comprises a first protrusion ring160that is connected with an end side of the drug guiding pipe110that faces the sealing structural member220, at least one first protrusion ring160is provided and arranged spacedly, each of the at least one first protrusion ring160abut against the first seal shim250during the closed state. In this way, the sealing property of the opening of the second pipe end112is further improved.

Please refer toFIGS. 2-3, further, the push member210comprises a positioning block213connected to the end of the push rod211, the positioning block213is located at the end side of the push rod211that faces the sealing structural member220, the surface of the sealing structural member220that faces the positioning block213defines a positioning groove221that matches a shape of the positioning block213, and the positioning block213is inserted into the positioning groove221. In this way, it is convenient to realize fast assembly of the push member.

In this embodiment, the sealing structural member220comprises a circular plate222and a guiding column223that is connected with one side of the circular plate222, the above elastic member230is a spiral spring, the spiral spring is sheathed on the guiding column223with one end thereof abutting against the side of the circular plate222and the other end thereof abutting against a bottom of the open cavity241. The other side of the circular plate222that is away from the guiding column223defines the positioning groove221towards the guiding column223. In this way, because the guiding column223is inserted in the spiral spring and functions in guiding, the spiral spring can be compressed or expanded along the length direction of the guiding column223, thus improving the stability of the spiral spring.

Please refer toFIGS. 2-5, further, the drug guiding structure100comprises a circular-shaped flange170fixed inside the container6, the flange170is sheathed outside an end of the drug guiding pipe110away from the seal pipe130and is connected to the drug guiding pipe110. The flange170and the support240are in snap fit. In this way, on one hand, it is convenient to fast assemble and disassemble the support240, and on the other hand, the stability of the support240is improved.

In this embodiment, the flange170is connected with a bottom end of the support base150.

Please refer toFIGS. 2-3 and 5, further, the drug guiding structure100comprises clasps180connected to the flange170, the number of the clasps180is plural and the clasps are uniformly arranged around the drug guiding pipe110and on a surface of the flange170facing the container6, the support240defines an annular slot243on an inner wall of the open cavity241, and all the clasps180are inserted into the open cavity241and in snap fit with the annular slot243.

Please refer toFIGS. 2-3, further, the drug guiding structure100further comprises a second seal shim190that is pressed between the flange170and the container6and is ring-shaped. The second seal shim190is made from EVA material. In this way, the sealing property between the flange170and the container6is improved.

Please refer toFIGS. 2-3 and 5, further, the flange170comprises a main plate171and a second protrusion ring172connected with a surface of the main plate171facing the container6, at least one second protrusion ring172is provided and arranged spacedly, each of the at least one second protrusion ring172abut against the second seal shim190, which further improves the sealing property between the flange170and the container6.

In this embodiment, the surface of the main plate171facing the container6is provided with an accommodation groove173, the drug guiding pipe110passes through the accommodation groove173, and each of the clasps180are connected with a bottom of the accommodation groove173. The support240comprises a main support244and a lug245connected with the main support244, the main support244has the above-described open cavity241and the perfusion mouths242, the lug245is ring-shaped and sheathed on a periphery of the main support244at an open end of the open cavity241, and the lug245and the open end of the main support244are inserted into the accommodation groove173and the lug245abut against the container6.

Please refer toFIGS. 1-3, the present application further provides an anesthetic filling system7, configured to connect with the evaporator5to introduce the anesthetic to the evaporator5. The anesthetic filling system7comprises the container6and the above-described connecting valve structure1. The container6comprises a cavity accommodated with the anesthetic and the drug outlet communicating with the cavity, the connecting valve structure1is fixed at the drug outlet and in seal fit with the drug outlet.

In this embodiment, when the above-described connecting valve structure1is applied to the anesthetic filling system7, the insertion-pull force between the connecting valve structure1and the evaporator5is effectively decreased, which is convenient for the medical staff to operate, and further improve the sealing property between the connecting valve structure1and the drug filling system, thereby improving the transferring efficiency of the anesthetic. The anesthetic filling system7is primarily used to accommodate, but is not limited to, the desflurane.

Please refer toFIGS. 2-3, the anesthetic filling system7further comprises a lid2, and the lid is used to cover an end part of the drug guiding structure100away from the container6during the closed state.

In this embodiment, because a boiling point of the desflurane is 22.8° C., which approaches the room temperature, and it is therefore indicated that a part of the desflurane presents in the gas state at the room temperature. When the valve core assembly200is in the closed state, it is required to cover the end part of the drug guiding structure100away from the container6by the lid2, in this way, on the one hand, a barrier for preventing the loss of the anesthetic (desflurane) is provided, and on the other hand, impurities which may otherwise pollute the connecting valve structure1are prevented from inside the connecting valve structure1.

Please refer toFIG. 2andFIG. 3, further, the anesthetic filling system7further comprises a seal ring3, the seal ring3is fixed inside lid1and is pressed between the lid and the end part of the drug guiding structure100away from the container6. In this way, on the one hand, the atmospheric air is prevented from entering the connecting valve structure1or polluting the remaining anesthetic in the connecting valve structure, and on the other hand, the anesthetic inside the connecting valve structure1is prevented from leaking out, thus improving the sealing property of the drug guiding structure100. The seal ring3adopts the EVA material.

A specific embodiment is provided for explanation, please refer toFIG. 6, the present application provides an anesthetic filling system7comprising a drug receiving port102, the drug guiding structure100, and the push member210. The drug receiving port102is provided thereon with the lid2. An inner side of the lid2is provided with the seal ring3, an upper part of the drug guiding structure100is provided with a seal structure4, the push member210is inserted into the drug guiding structure10, a joint part between the drug guiding structure100and the support240is provided with the second seal shim190, a joint part between the push member210and the sealing structural member220is provided with the first seal shim250, the elastic member230(spring) is sheathed on the sealing structural member220, the upper part of the drug guiding structure100is provided with the pressure stabilizing groove for arrangement of the seal structure4.

In the anesthetic filling system7provided by the present application, the seal structure4adopts an ear-shaped plastic material which can be directed inserted into the filling port51of the evaporator5, the sealing projection ring is in interference fit, and a back pressure of the air pressure realizes excellent sealing property; the drug receiving port102is inserted into the filling port51of the evaporator5after the lid2is threaded therefrom; a push member210at the drug receiving port102and a rod at the filling port51of the evaporator5mutually pushes their separate elastic members to be compressed; the sealing structural member220of the drug receiving port102is pushed downwards so that the sealing structural member220is separated from the drug guiding structure110, the seal state is interrupted, and the drug liquid flows out of the drug container6; and the sealing of the filling port51of the evaporator5is also interrupted as being pushed to separate the sealing end, thus allowing the drug liquid to flow inside the evaporator5.

The aforementioned embodiments are only preferred embodiments of the present application, and are not intended to limit the present application. It will be apparent to those skilled in the art that various changes and modifications of the present application may be made. Any modification, equivalent replacement, improvement, and so on, which are made within the spirit and the principle of the present application, should be included in the protection scope of the present application.