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BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a barrier structure, and, more particularly, to an expansion-sealed flood control gate. 
     2. Description of the Related Art 
     Due to global warming effects, and as the global climate gradually changes, more flooding is occurring all over the world, and people are suffering from these natural disasters. In order to prevent flooding in buildings, people often use flood control gates at the entrance of the building. The typical flood control gate usually utilizes a water barrier overlaying method to deal with different flood heights and employs a heavy water barrier; as a result, the gap between each water barrier increases with the number of water barriers, which also increases the risk. In order to achieve ease of construction and lower construction costs, the traditional flood control gate design still utilizes right angled equipment for the corners; however, sharp bends in the compression strip causes uneven compression stress distributions across the compression strip. In addition, the junction of the compression strip at the corners are made by physical contact, therefore, the compression stresses at the conjunction are not completely not predictable or controllable, which is the basis of the most common leakage problems in traditional flood control gates. 
     The compression stresses on the traditional flood control gate is passive, which are generated according to the external forces. However, under partial water barrier weights, most external compression forces are applied on the water barrier at various points, which the water barrier then applies to the compression strip. In the traditional method, the compression stress value and the distance between each compression force application point are inversely proportional; in another words, when the distance is closer the compression stress values are higher, and vice versa. In order to solve this problem, more compression force application points and increased compression forces are the only two solutions. However, increasing the number of compression force application points causes an increased compression frequency, which results in longer construction times and higher material costs. Furthermore, increased compression forces causes compression stress concentration effects on local materials to be more severe at the compression force application points, which causes material fatigue and potential points of failure. 
     In addition, the longer the width of the flood control gate the more difficult it is for mechanical processes or construction applications to keep the gap constant or the gap to a minimum between the compression strip and the gate lip. Higher process accuracies lead to much higher equipment costs, and an increased strip thickness for gap adjustment purposes causes higher strip material costs. Another issue is, if the gate lip is accidently damaged and deformed during construction or later operations, the reliability of the damaged area becomes unpredictable. Therefore, based on either common experience or theoretical analysis, the more gaps generated in the construction of the flood control gate, the higher the associated risk. Therefore, both performance and maintenance issues for a stacked flood control gate are very worrying. 
     Therefore, it is desirable to provide an expansion-sealed flood control gate to mitigate and/or obviate the aforementioned problems. 
     SUMMARY OF THE INVENTION 
     A main objective of the present invention is to provide an expansion-sealed flood control gate which has the characteristics of active filling and uniform packing stresses that have higher geometric tolerances, even if the slits between the water board, the constraint tracks and the ground emerge under unexpected geometrical changes. Encased expandable sealing tubes balloon to mend the slits. 
     Another objective of the present invention is to provide an expansion-sealed flood control gate, which reinforces the entire structural strength to increase back support against water pressure and provide a double seal to prevent leakage. 
     Another objective the present invention is to provide an expansion-sealed flood control gate, which requires only screws, pins etc. for positioning; therefore, there are no worries concerning uneven compression forces and the assembly or maintenance is both easy and convenient. 
     To achieve the objective of the preset invention, an expansion-sealed flood control gate of the present invention comprises a water barrier, a frame structure, at least two constraint tracks, at least one encased expandable sealing tube and a plurality of adapters. The frame structure is installed onto the ground and at least two walls. The constraint tracks are installed on an inner side of the frame structure, a U-shaped slot is formed between the two constraint tracks and used for placement of the water barrier; wherein at least one constraint track includes an extended securing panel and a concave cover, and the concave cover, the frame structure and the water barrier form a U-shaped chamber with two connected ends. The encased expandable sealing tube is installed in the concave cover; wherein when the encased expandable sealing tube absorbs an in-flowing fluid the encased expandable sealing tube fills the U-shaped chamber to compress the edge of the water barrier. The adapters are connected to an open end of the encased expandable sealing tube and attached to the two ends of the constraint tracks. 
     Furthermore, the objective of the present invention can be achieved by following structure details. 
     In the expansion-sealed flood control gate, the constraint tracks are U-shaped, and the constraint tracks have curved corners. 
     Each constraint track comprises a horizontal track, two vertical tracks and two corners tracks. 
     The concave covers are disposed at both sides of the U-shaped slot without isolating the water barrier and the encased expandable sealing tube. 
     Each adapter is a module including a main body, a jacket and a fastening element; wherein the main body is inserted into a corresponding opening of the encased expandable sealing tube, and the jacket is placed on an outside of the corresponding opening of the encased expandable sealing tube to tightly seal the opening of the encased expandable sealing tube; and wherein the fastening element is used for securing the jacket to the corresponding end of the constraint track. 
     The insertion region of the main body has an enlarging head, and the jacket has a convergent opening matching to the enlarging head to clip the tube. 
     The main body of the adapter has a fitting used for providing an external connection without leakage. 
     The expansion-sealed flood control gate further comprises a pressure increasing device connected to the fitting so the encased expandable sealing tube evenly and completely expands to fully fill up the inside of the constraint track. 
     Each adapter further includes a tube bundle for tightening the jacket. 
     The expansion-sealed flood control gate further comprises a reinforcement mechanism for providing structural reinforcement to the water barrier. 
     The reinforcement mechanism includes a horizontal main reinforcement bar which is connected to both ends of the constraint tracks along the top of the water barrier, and a water barrier clip is installed on the front of the horizontal main reinforcement bar for preventing the water barrier from disengaging. 
     The reinforcement mechanism includes at least one vertical reinforcement module for providing support to the water barrier against water pressure. 
     The vertical reinforcement module comprises a vertical column, an inclined reinforcement column and a deflection compensation mechanism; wherein the deflection compensation mechanism is disposed on the top edge of the vertical column and pivoted to the inclined reinforcement column and is used for adjusting the height of a force point on the vertical column applied by the inclined reinforcement column. 
     A main body of the deflection compensation mechanism combined with the vertical column has two symmetric slots; and the deflection compensation mechanism further includes a slide block in the main body, a plurality of guiding slide rods disposed on two sides of the main body, and a rotatable bolt mounted on the main body; wherein the guiding slide rods are inserted through the slots and a pivot hole of the inclined reinforcement column and combined with an axle hole of the slide block, wherein the rotatable bolt has a bottom end in the main body for pushing against the slide block. 
     The vertical reinforcement module further comprises a lower quick-hinged mechanism disposed on the bottom edge of the vertical column for quickly obtaining support from a low anchor point. 
     The reinforcement mechanism includes at least one horizontal reinforcement bar module, which is used for providing horizontal structural reinforcement for the water barrier. 
     The horizontal reinforcement bar module comprises a horizontal structural main body, which is adapted for combination with the vertical column of the vertical reinforcement module or the constraint tracks to provide a meshed framework structure for the water barrier. 
     The horizontal reinforcement bar module further includes a hinged rocker arm disposed on one end of the horizontal structural main body and used for quickly hinging the horizontal structural main body to the anchor point of the constraint track. 
     The encased expandable sealing tubes are tubular hollow elements made of a thin film material with a low hardness, high elongation and high tensile strength, and used for filling up the surrounding U-shaped chamber when the elements expand. 
     The water barrier is made of a light weight and high strength material so it is easy to push the edge of the water barrier into the U-shaped slot. 
     The adapter can have a pressure meter for informing the pressure value in the encased expandable sealing tube. 
     The inside of the frame structure has a plurality of curved corner braces to ensure the constraint track is curly bent. 
     According to the above description, the expansion-sealed flood control gate of the present invention has following benefits and effects: 
     1. With the combination of the water barrier, the constraint tracks and the encased expandable sealing tube, since the post-expansion encased expandable sealing tube has filling and even compression force characterizes which means it has high geometry error tolerance; even geometric changes to the water barrier, the constraint tracks and the ground themselves, or the gaps in-between them, can be solved by the encased expandable sealing tube to prevent flooding and increase leakage-free reliability. 
     2. With the combination of the water barrier and the reinforcement mechanism, since the reinforcement mechanism includes at least one vertical reinforcement module and a horizontal reinforcement module; wherein two module are connected together to form a meshed framework, which provides a structural strength reinforcement to the water barrier, and the inclined reinforcement column of the vertical reinforcement module provides support to the water barrier against water pressure. 
     3. With the combination of the encased expandable sealing tube and the adapter, each encased expandable sealing tube has two ends, any of the expandable sealing tube is an independent seal, and two tracks provide double assurance. Moreover, the pressure meter can verify the sealing capability of the gate, which brings peace mind to the user. 
     4. With the combination of the water barrier, the constraint tracks and the reinforcement mechanism, since the disassembly of the gate only requires securing the bolts and the pins, there is no worry for low or uneven compression force causing leakage, and the simple assembly is easy for installation and maintenance. 
     Other objects, advantages, and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of an expansion-sealed flood control gate according to an embodiment of the present invention. 
         FIG. 2  is a detailed view of a constraint track and a corner track of an embodiment expansion-sealed flood control gate. 
         FIG. 3  is a detailed view of a pre-expansion encased expandable sealing tube of an embodiment expansion-sealed flood control gate. 
         FIG. 4  is a detailed view of a post-expansion encased expandable sealing tube according to an embodiment of the present invention. 
         FIG. 5  is a detailed view of an adapter for an embodiment expansion-sealed flood control gate. 
         FIG. 6  is a perspective view of a pressure meter connected to an embodiment adapter. 
         FIG. 7  is a perspective view of a vertical reinforcement module of an embodiment expansion-sealed flood control gate. 
         FIG. 8  is an exploded view of a deflection compensation mechanism of an embodiment expansion-sealed flood control gate. 
         FIG. 9  is an exploded view of an inclined reinforcement column of an embodiment expansion-sealed flood control gate. 
         FIG. 10  is an exploded view of a lower quick hinged mechanism of an embodiment expansion-sealed flood control gate. 
         FIG. 11  is an exploded view of a horizontal reinforcement bar module of an embodiment expansion-sealed flood control gate. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Please refer to  FIG. 1  and  FIG. 2 .  FIG. 1  is a perspective view of an expansion-sealed flood control gate according to an embodiment of the present invention.  FIG. 2  is a detailed view of a constraint track and a corner track of the expansion-sealed flood control gate according to the embodiment of the present invention. An expansion-sealed flood control gate  100  comprises a water barrier  110 , a frame structure  120 , at least two constraint tracks  130 , at least one encased expandable sealing tube  140  and a plurality of adapters  150 . The water barrier  110  has direct contact with the water and is made of a light weight and high strength material which is easy to store and assemble. Preferably, the water barrier  110  is a transparent material to permit viewing of the water level. The water barrier  110  may be made of PC boards, which can be rolled up for storage, and so may require much less storage space while providing strength and which will not be affected by surface damage. As shown in  FIG. 2 , the frame structure  120  is used for ground installation and wall installation purposes. The frame structure  120  has civil structures perpendicular for the ground and the walls, and further has a plurality of curved corner braces  121  placed on the inner side of the frame structure  120  at the corners so that the constraint tracks  130  have rounded bends at the corners. As shown in  FIG. 1 , the frame structure  120  may be a pre-installed assembly to replace the original civil structure of ground/wall. The frame structure  120  is used for containing and positioning the constraint tracks  130 . After the above-mentioned assembly process is completed, the expansion-sealed flood control gate  100  has basic water blocking capabilities. As shown in  FIG. 2 , the constraint tracks  130  are disposed on the inner side of the frame structure  120 , and the gap between the constraint tracks  130  forms a U-shaped slot  131 , which is used for placement of the water barrier  110 . At least one constraint track  130  has an extended securing panel  132  and a concave cover  133 , and the concave cover  133 , the frame structure  120  and the water barrier  110  compose a U-shaped chamber  134  with two connecting ends. The U-shaped chamber  134  is used for containing the encased expandable sealing tube  140 . When the water barrier  110  is not inserted in the U-shaped slot  131 , the two sides of the concave cover  133  are connected. As shown in  FIGS. 1 and 2 , the constraint tracks  130  are U-shaped, and the constraint tracks  130  have curved corners. In this embodiment, the encased expandable sealing tubes  140  placed through the U-shaped chambers  134  are continuous elements and have no shape turns; therefore, there is no chance of leakage occurred at the right angle of the traditional gate. 
     To be more specific, as shown in  FIGS. 3 and 4 , the concave covers  133  are placed on both sides of the U-shaped slot  131  and do not completely isolate the water barrier  110  from the encased expandable sealing tubes  140 . Furthermore, the extended securing panel  132  provides space and positioning for a plurality of track securing screws or pins  122  so the extended securing panel  132  can be attached to the frame structure  120 . The concave covers  133  are symmetrically placed to form the U-shaped slot  131  for placement of the water barrier  110 . When the water barrier  110  is positioned, the water barrier  110 , the concave cover  133  and the frame structure  120  form two symmetric U-shaped chambers  134 . When the encased expandable sealing tubes  140  expand and completely fill up the U-shaped chambers  134 , two independent U-shaped seals are formed. Even if one of the encased expandable sealing tubes  140  is damaged, the other encased expandable sealing tube  140  can still provide a single U-shaped seal to prevent leakage. More specifically, as shown in  FIG. 2 , the extended securing panel  132  can be locked onto the frame structure  120  via the track securing screws or pins  122  to secure the constraint tracks  130 . Please refer again to  FIGS. 1 and 2 . Each constraint track  130  is composed of a horizontal track  135 , two vertical tracks  136  and two corner tracks  137 , which all correspond to the frame structure  120  having curved corner braces  121  to ensure that the cross-sectional shape of the U-shaped chambers  134  are identical. As a result, there are no right angle junctions as otherwise found in traditional flood control gates and which may cause leakage. 
     Please refer to  FIGS. 3 and 4 . The encased expandable sealing tubes  140  are placed in the constraint tracks  130  by way of the concave covers  133 . The encased expandable sealing tubes  140  expands and fills the U-shaped chambers  134  by directing fluids to press against the edge of the water barrier  110 . Fluids such as air, oil or water can be used for expanding the encased expandable sealing tubes  140 , until the inner pressure value reaches a predetermined value, wherein air is the appropriate fluid. The encased expandable sealing tubes  140  may be tubular hollow elements made of a thin film material with a low hardness, high elasticity and high tensile strength, such as rubber, plastic etc., and are seamless and independent. The encased expandable sealing tubes  140  are placed continuously and unbroken in the U-shaped chambers  134 . In this embodiment, the fluid is introduced by a high pressure gas source to expand the encased expandable sealing tubes  140  to fill the U-shaped chamber  134  (as shown in  FIG. 4 ). In a different embodiment, a high pressure liquid source is utilized to expand the encased expandable sealing tubes  140 . More specifically, as long as the introduced fluid in the encased expandable sealing tubes  140  has a higher pressure than the water pressure of the flood, the two water gaps at the edge of the water barrier  110  and the frame structure  120  will be isolated. Even if the user forgets to increase the pressure of the encased expandable sealing tubes  140  and as a consequence water is leaking, as long as the user immediately increases the pressure of any one of the encased expandable sealing tubes  140  to the predetermined pressure, such leakage can be stopped immediately. Preferably, the expanded encased expandable sealing tubes  140  has self-expand and even compress stress characteristics and higher geometric error tolerances. Even for geometric changes to the water barrier  110 , the constraint tracks  130  and the frame structure  120  themselves, or the gaps in-between them (such as accidental dents, uneven surfaces on the frame, foreign debris, etc.) can be solved by the encased expandable sealing tubes  140  to prevent flooding and increase leakage-free reliability. The compression stresses applied to the encased expandable sealing tubes  140  for sealing are much lower than the compression stresses applied to traditional compression strips, and since an even compression force is generated by fluidic pressure (especially gas), there are no compression stress concentration effects on local materials or any related side effects that otherwise occur in typical flood control gates. 
     Please refer to  FIGS. 3 and 4 . When the water level rises above the constraint tracks  130 , two leakage locations may occur: one is between the water barrier  110  and the constraint tracks  130 ; another is between the constraint tracks  130  and the frame structure  120 . However, both gaps are sealed by the expanded encased expandable sealing tubes  140  with sufficient pressure. Therefore, the two independent constraint tracks  130  are provided to double sealing effect, and to increase leakage-free reliability. Even if any one of the encased expandable sealing tubes  140  fails and water leaks into the corresponding constraint track  130  and moves from the gap between the water barrier  110  and the frame structure  120  into another U-shaped chamber  134 , as long as the encased expandable sealing tube  140  in this chamber  134  has the predetermined pressure, the flood control gate is still effective. 
     Please refer to  FIGS. 1 and 5 . The adapters  150  are connected to a plurality of open ends of the encased expandable sealing tubes  140  and fastened on the constraint tracks  130  at the connected ends. In this embodiment, each adapter  150  is a module including a main body  151 , a jacket  152  and a fastening element  153 . The main body  150  is inserted into a corresponding opening of the encased expandable sealing tube  140 ; the jacket  152  is placed on an outside of the corresponding opening of the encased expandable sealing tube  140  to tightly seal the opening of the encased expandable sealing tube  140 ; and the fastening element  153  is used for securing the jacket  152  to the corresponding end of the constraint tracks  130  via a plurality of adapter securing screws or pins  159 . Preferably, as shown in  FIGS. 5 and 6 , each adapter  150  further includes a tube bundle  156  for tightening the jacket  152  to indirectly secure the encased expandable sealing tube  140  therein again. Preferably, the insertion region of the main body  151  has an enlarging head  154 , and the jacket  152  has a convergent opening matching to the enlarging head  154  to clip the tube  140 . When the fluid pressure in the encased expandable sealing tube  140  increases, the relative moving distance with respect to the main body  151  also increases, and so the gap between the insertion region and the inner surface of jacket  152  decreases and the encased expandable sealing tube  140  between the main body  151  and the jacket  152  experiences higher compressive forces, in other words, a tighter engagement, which provides a self-locking effect. As shown in  FIG. 5 , the main body  151  of each adapter  150  further includes a fitting adapter  155 , and the fitting adapter  155  is used for providing an external connection for the adapter  150  without leakage. The fitting adapter  155  may have different dimensions, which can be suitable for any size and device, such as an intake check adapter, a pressure meter, a pressure sensor, a safety valve, or a quick-release adapter. In this embodiment, a pressurizing device  160  (for example a pump as shown in  FIG. 1 ) is connected to the fitting adapter  155  of the adapter  150  so the encased expandable sealing tubes  140  are evenly and thoroughly expanded in the constraint tracks  130  to seal the gaps of the constraint tracks  130  and the edges of the water barrier  110 . More specifically, as shown in  FIG. 5 , the adapter  150  further includes an intake check adapter  156 . The pressurizing device  160  is first connected to the intake check adapter  156 , and then introduced into the encased expandable sealing tubes  140  via the fitting adapter  155 . The pressurizing device  160  or other equivalent machine continuously introduces fluid into the encased expandable sealing tubes  140  until the predetermined pressure is reached, so the encased expandable sealing tubes  140  are evenly and thoroughly expanded in the U-shaped chamber  134  (as shown in  FIG. 4 ) to seal the gaps at the edges of the constraint tracks  130 , the frame structure  120  and the water barrier  110 . 
     Moreover, a pressure meter  157  may be installed at the adapter  150  at the other end (as shown in  FIG. 6 ) and used for showing the pressure value in the encased expandable sealing tubes  140 , permitting the user to check whether the encased expandable sealing tubes  140  have reached the predetermined pressure. If the user notices the encased expandable sealing tubes  140  have insufficient pressure, he or she may need to perform a check up or repair. In another embodiment, the user can utilize an automatic control element to remotely control the pressure adjustment process of the pressurizing device  160 , so he or she can monitor the expansion-sealed flood control gate  100  in real time. 
     Preferably, the expansion-sealed flood control gate  100  further comprises a reinforcement mechanism (for example, the reinforcement mechanism is comprised of the vertical reinforcement module  180  and the horizontal reinforcement bar module  190  as shown in  FIG. 1 ), which is used for providing structural reinforcement to the water barrier  110  and to prevent bending or deformation of the water barrier  110 . Please refer to  FIGS. 1 and 7 . The reinforcement mechanism includes a horizontal main reinforcement bar  170  which is connected to both ends of the constraint tracks  130  along the top of the water barrier  110 . And a water barrier clip  171  is installed on the front of the horizontal main reinforcement bar  170 , and which is used to prevent disengagement of the water barrier  110 . In this embodiment, the reinforcement mechanism further includes at least one vertical reinforcement module  180 ; the vertical reinforcement module  180  is securely attached to the main reinforcement bar  170  via a plurality of locking pins  181 A and provides support to the water barrier  110  against water pressure. The vertical reinforcement module  180  comprises a vertical column  181 , an inclined reinforcement column  182  and a deflection compensation mechanism  183 . As shown in  FIGS. 7 and 8 , in this embodiment, the deflection compensation mechanism  183  is disposed on the top edge of the vertical column  181  and pivoted to the inclined reinforcement column  182  and is used for adjusting the height of the force point on the vertical column  181  applied by the inclined reinforcement column  182 . The main body of the deflection compensation mechanism  183  combined with the vertical column  181  has two symmetric extended slots  183 A, and the inclined reinforcement column  182  is moveably pivoted to the extended slots  183 A of the deflection compensation mechanism  183 . The deflection compensation mechanism  183  further includes a slide block  183 B between the extended slots  183 A, a plurality of guiding slide rods  183 C disposed on two sides of the main body, and a rotatable bolt  183 D mounted on the main body. With the guiding slide rods  183 C being inserted through the slots  183 A and a pivot hole  182 A of the inclined reinforcement column  182  and combined with an axle hole of the slide block  183 B, a bottom end of the rotatable bolt  183 D is used for pushing against the slide block  183 B. The rotation depth of the rotatable bolt  183 D can adjust the height of a force point (corresponding to the slide block  183 B) on the vertical column  181  applied by the inclined reinforcement column  182 . More specifically, the structure of the expansion-sealed flood control gate  100  is weaker in the direction at which water pressure is applied; when the water level is higher, and the span is longer, so the deflection generated by the expansion-sealed flood control gate  100  is higher. Through the deflection compensation mechanism  183 , by use of the rotatable bolt  183 D to adjust the force point on the vertical column  181  applied by the inclined reinforcement column  182 , provides the different geometric rigidity to compensate for the deflection generated by the expansion-sealed flood control gate  100 . Furthermore, as shown in  FIG. 9 , each inclined reinforcement column  182  utilizes a stopping bolt  185 D attached to an inclined stop  185 . In this embodiment, a lower connecting hole  182 B is placed at the lower edge of the inclined reinforcement column  182 , the inclined stop  185  includes a stopping base  185 A and a pivoting bolt  185 B, and the pivoting bolt  185 B is placed though the lower connecting hole  182 B and the stopping base  185 A to hinge the inclined reinforcement column  182  with the inclined stop  185 . Therefore, whether the incline angle of the inclined reinforcement column  182  needs to be adjusted during the assembly or the horizontal angle of the ground has changed, the bottom of the stopping base  185 A can always completely touch the ground. As shown in  FIG. 1 , the stopping bolt  185 D is normally locked with an expandable bolt  185 E buried in the ground; for assembly purposes, the user unbolts the stopping bolt  185 D, moves along a groove  185 C of the stopping base  185 A until the stopping base  185 A sets, and finally screws the stopping bolt  185 D tightly. Accordingly, when the water pressure is pushing the water barrier  110 , the inclined stop  185  can transfer the reaction force in the horizontal and the vertical directions to the vertical reinforcement module  180  via the combination of the stopping bolt  185 D and the corresponding expandable bolt  185 E, to provide enough back support to the water barrier  110  against water pressure. Please refer again to  FIGS. 1 and 10 . The vertical reinforcement module  180  further includes a lower quick hinged mechanism  184  disposed on the bottom edge of the vertical column  181 , which is used to quickly obtain support from a low anchor point. In this embodiment, each lower quick hinged mechanism  184  comprises a ground hinged block  184 A and a hinged bolt  184 B. The ground hinged block  184 A is attached via a fastening pin  184 C to an expandable bolt  184 D buried in the ground. The hinged bolt  184 B is used as pivot shaft and placed through the correspond hole on the lower end of the vertical column  181  and the ground hinged block  184 A, so the vertical column  181  is mounted on the ground hinged block  184 A. 
     Please refer to  FIGS. 1 and 11 . The reinforcement mechanism further includes at least one horizontal reinforcement bar module  190 , which is used for providing horizontal structural reinforcement for the water barrier  110 . The horizontal reinforcement bar module  190  comprises a horizontal structural main body  191 , which is adapted for combination with the vertical column  181  of the vertical reinforcement module  180  or the constraint tracks  130 . For example, a plurality of rods are placed between the vertical columns  181  and between the outermost vertical columns  181  and the vertical tracks  136  of the constraint tracks  130 , to provide a meshed framework structure to the water barrier  110 . In this embodiment, as shown in  FIG. 7 , each vertical column  181  further includes a plurality of fastening elements  181 B, and each fastening elements  181 B has a horizontal supporting face and a vertical fastening face. As shown in  FIGS. 1 and 7 , the horizontal structural main body  191  of the horizontal reinforcement bar module  190  further includes a plurality of sectional rods, and the sectional rods between the vertical columns  181  can be fastened and placed in the fastening elements  181 B without extra engaging elements. In this embodiment, with reference to  FIG. 1 , each horizontal reinforcement bar module  190  further includes a hinged rocker arm  192 . And, as shown in  FIG. 11 , the hinged rocker arm  192  is connected to one end of the horizontal structural main body  191  via a engaging pin  192 A, and this engaging end of the horizontal structural main body  191  is one end of the rod between the outermost vertical column  181  and the vertical track  136  of the constraint tracks  130  (as shown in  FIG. 1 ). Furthermore, the hinged rocker arm  192  is pivoted to a hinging block  192 C via a hinged bolt  192 B. The hinging block  192 C is attached to an expandable bolt  192 E buried in the wall by a securing pin  192 D. With the combination of the hinged rocker arm  192  and hinging block  192 C, an anchor point is formed on the constraint tracks  130  so the horizontal structural main bodys  191  can quickly be hinged to the anchor point of the constraint tracks  130 . Therefore, the reinforcement mechanism (including the vertical reinforcement module  180  and the horizontal reinforcement bar module  190 ) is very easy to assemble, providing a water barrier  110  free from leakage caused by a weak structure or uneven compressive forces, and the light weight and simple assembly mechanism is convenient for installation or maintenance purposes. 
     Although the present invention has been explained in relation to its preferred embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the invention as hereinafter claimed.

Summary:
Disclosed is an expansion-sealed flood control gate, comprising a water board, a frame structure, two symmetrical constraint tracks, at least one encased expandable sealing tube, and a plurality of adapters. A U-shaped slot is formed between the two symmetrical constraint tracks for plugging in the water board. Each constraint track has a U-shaped expanding compression chamber connecting from one end to the other end to accommodate the tube inside. The adapters are connected with the open ends of the tube and fixed on the constraint tracks at the connected ends. Accordingly, there can be effectively repelled floods that the tube with the characteristics of active filling and uniform packing stress have the higher geometric tolerance, even if the slits between the water board, the constraint tracks and ground emerge the unexpected geometrical change, the encased expandable sealing tubes are ballooned to mend the slits.