Door beam for flexible waterproof door and flexible waterproof door

Abstract

The invention discloses a door beam for a flexible waterproof door and the flexible waterproof door. The positions, close to the two ends, of the front side face and the rear side face of the door beam are each provided with a guide part, and the guide parts are used for being in limiting sliding fit with guide grooves of limiting guide rails in gate grooves of gate piers correspondingly. The positions, close to the two ends, of the door beam are further provided with two sets of roller assemblies respectively, and the two sets of roller assemblies are located on the front side face or the rear side face of the door beam, close to the outer side and the inner side of the guide part on the side respectively and used for being in rolling fit with the outer walls of the two sides of the limiting guide rail. According to the scheme, the problems that an existing flexible waterproof door is large in opening and closing force and prone to self-locking in the operation process can be solved, the operation safety of the flexible waterproof door is improved, and the timeliness of the water inlet and the water outlet is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water conservancy and hydropower engineering, and in particular relates to a door beam for a flexible water gate and a flexible water gate. BACKGROUND

[0002] Large and medium-sized hydropower projects with high dams and large reservoirs have large reservoir capacity and deep reservoir water, which causes a certain degree of change in the spatial and temporal distribution of the original natural river water temperature. The water temperature in the reservoir generally forms a vertical distribution, with high surface temperature and low bottom temperature. The water intake of the water diversion and power generation system generally uses a deep hole. Therefore, the discharge water temperature is lower than that of the original natural river at certain times, which causes a certain degree of adverse impact on the downstream ecological environment. In addition, the friction between the steel beam in the traditional flexible curtain beam gate structure and the limiting groove is large during the folding and unfolding process, which affects the operation safety and makes it difficult to guarantee the timeliness of adjusting the water intake. In particular, in high dams, the operation of the beam gate is complex and the lifting height is large. For example, in the Jinsha River Xiluodu Hydropower Station, 90 times of leaf lifting are required to operate one layer of beam gate.

[0003] Among them, the current flexible water gate layered water intake device, such as the one disclosed in Chinese patent No. CN118326912A, is mainly composed of a frame main beam and flexible leaves. The folding and stretching of the flexible leaves are realized by the sliding cooperation of the water gate assembly and the door groove structure. This design enables the water gate assembly to shrink and expand in the water level elevation direction, thereby adjusting the water intake depth and opening degree. However, the sliding friction between the water gate frame main beam and the door groove results in a large opening and closing force, and the self-locking problem easily occurs during operation. SUMMARY

[0004] The present application discloses a door beam for a flexible water gate and a flexible water gate to solve the problem of large opening and closing force and easy self-locking during operation of the current flexible water gate, and improve the safety of the flexible water gate operation and ensure the timeliness of the water intake.

[0005] To solve the above problems, the present application adopts the following technical solutions: In a first aspect, the present application provides a door beam for a flexible water gate. The front side and the rear side of the door beam are provided with guide portions near the two end portions, respectively. The guide portions are used for limiting sliding cooperation with the guide grooves of the limiting guide rails in the gate pier door groove. Two groups of roller assemblies are also provided near the two end portions of the door beam, respectively. The two groups of roller assemblies are located on the front side or the rear side of the door beam and are adjacent to the outer side and the inner side of the guide portion on that side, respectively, for rolling cooperation with the two side outer walls of the limiting guide rails.

[0006] Optionally, the roller assembly comprises a mounting base and rollers, the mounting base is arranged perpendicularly to the length direction of the door beam, and the length of the mounting base is greater than the width of the door beam, both ends of the mounting base are located outside the door beam, and the rollers are rotatably arranged at both ends of the mounting base.

[0007] Optionally, the mounting part is an angle steel structure, one side plate of the angle steel structure is fixed to the door beam, and the rollers are rotatably arranged at both ends of the side plate, and the other side plate of the angle steel structure is away from the guide part.

[0008] Optionally, the rollers are detachably connected to the side plate of the angle steel structure through a bolt structure.

[0009] Optionally, the door beam is further provided with an abutting piece adjacent to the side edge of the flexible door leaf, and the abutting piece is located on the side of the door beam where the flexible door leaf is located; when the flexible door leaf is in the stretched state, the abutting piece abuts against the side edge of the flexible door leaf.

[0010] Optionally, the abutting piece is a pressing sheet, one end of the pressing sheet is fixedly connected to the door beam, and the other end of the pressing sheet is an elastic free end; when the side edge of the flexible door leaf is attached to the pier wall surface, the elastic free end of the pressing sheet is in a curved or folded state, used for abutting against the side edge of the flexible door leaf and generating an elastic force for pressing the side edge of the flexible door leaf to the pier wall surface.

[0011] Optionally, the abutting piece is a connecting rod structure, both ends of the connecting rod structure are connected to two adjacent door beams, and the connecting rod structure has an unfolded state and a folded state; when the flexible door leaf is in the folded state, the connecting structure is also rotated to the folded state; when the flexible door leaf is in the stretched state, the connecting rod structure is rotated to the unfolded state and abuts against the side edge of the flexible door leaf.

[0012] In a second aspect, based on the door beam structure, the application further provides a flexible water isolation door, comprising a plurality of door beams arranged in sequence along the water level elevation direction, both ends of the door beam are slidably arranged in the corresponding pier slot, and a flexible door leaf is arranged between adjacent door beams; wherein the door beam is the door beam structure, both sides of the inner wall of the pier slot are provided with a limiting guide rail extending in the vertical direction, the limiting guide rail protrudes from the inner wall of the pier slot, the limiting part is located in the guide groove of the corresponding limiting guide rail and is in limiting sliding cooperation with the guide groove, and the two groups of rollers are in rolling cooperation with both sides of the outer wall of the corresponding limiting guide rail.

[0013] Optionally, the roller assemblies of two adjacent door beams are located on the opposite sides of the door beam.

[0014] Optionally, the flexible door leaf is provided with a water stop structure for abutting with the wall surface of the pier wall on both side edges of the pier door groove.

[0015] The technical scheme adopted by the present application can achieve the following beneficial effects: The door beam for the flexible water isolation door and the flexible water isolation door disclosed by the present application can form a first part limiting structure through rolling cooperation of the roller assembly and the two side outer walls of the limiting guide rail, which can not only play a limiting role on the guide part to prevent collision and friction between the guide part and the guide groove of the limiting guide rail, but also form a two-part limiting structure together with a second part limiting structure formed by the guide part and the guide groove of the limiting guide rail, so as to better ensure the movement of the door beam along the limiting groove of the limiting guide rail, prevent the collision between the door beam and the pier door groove, and the roller assembly also has the advantage of small friction; therefore, the present application can well ensure the running track of the door beam, effectively prevent the deformation and damage of the door beam, the pier door groove and the limiting guide rail, ensure the stability and reliability of the operation of the flexible water isolation door, and has the advantages of simple structure, convenient operation and maintenance and small opening and closing assisting force, thereby ensuring the timeliness of adjusting the water inlet. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which are included to provide a further understanding of the present application, constitute a part of the present application and illustrate the illustrative embodiments of the present application and their description serve to explain the present application, and do not constitute improper limitations on the present application. In the drawings: Figure 1 It is a structural schematic view of the door beam of the flexible water isolation door disclosed in the embodiments of the present application; Figure 2 It is a top view structural schematic view of the guide part and the roller assembly disclosed in the embodiments of the present application; Figure 3 It is a side view structural schematic view of the guide part and the roller assembly disclosed in the embodiments of the present application; Figure 4 It is a schematic view of the connecting rod structure disclosed in the embodiments of the present application; Figure 5 It is a schematic view of the connecting structure of the first connecting rod and the second connecting rod disclosed in the embodiments of the present application; Figure 6 It is a schematic view of the tablet pressing structure disclosed in the embodiments of the present application; Explanation of reference signs: 100 - door beam, 110 - flexible door leaf, 120 - first connecting rod, 121 - first guide hole, 130 - second connecting rod, 131 - second guide hole, 140 - hinge, 150 - spring structure, 160 - guide portion, 170 - roller, 180 - angle steel structure, 190 - roller assembly, 200 - pier wall, 210 - weather strip, 220 - pier door slot, 221 - limiting guide rail, 300 - pressing piece. DETAILED DESCRIPTION

[0017] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions will be described clearly and completely below with reference to the specific embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0018] The technical solutions disclosed by the various embodiments of the present application will be described in detail below with reference to the drawings.

[0019] Please refer to Figures 1 to 6 As shown in the drawings, the embodiments of the present application disclose a door beam 100 for a flexible water gate, the front side and the rear side of the disclosed door beam 100 are respectively provided with a guide portion 160 near the position of the two end portions, the guide portion 160 is respectively used for limiting sliding cooperation with the guide groove of the limiting guide rail 221 in the pier door slot 220; the position near the two end portions of the door beam 100 is also respectively provided with two groups of roller assemblies 190, the two groups of roller assemblies 190 are located on the front side or the rear side of the door beam 100 and are respectively adjacent to the outer side and the inner side of the guide portion 160 on the side, and are used for rolling cooperation with the two side outer walls of the limiting guide rail 221.

[0020] Among them, the first part of the limiting structure is formed by the rolling cooperation of the roller assembly 190 and the two side outer walls of the limiting guide rail 221, which can not only limit the guide portion 160 and prevent the collision and friction between the guide portion 160 and the guide groove of the limiting guide rail 221, but also form the second part of the limiting structure with the guide portion 160 and the guide groove of the limiting guide rail 221 to form two parts of the limiting structure, which can better ensure the movement of the door beam 100 along the limiting groove of the limiting guide rail 221, prevent the collision between the door beam 100 and the pier door slot 220, and the roller assembly 190 also has the advantage of small friction.

[0021] Therefore, compared with the existing flexible water gate structure design, the door beam 100 structure disclosed in the embodiment can well ensure the running track of the door beam 100, effectively prevent the deformation and damage of the door beam 100, the gate pier door groove 220 and the limiting guide rail 221, ensure the stability and reliability of the flexible water gate operation, and has the advantages of simple structure, convenient operation and small opening and closing assistance, thereby ensuring the timeliness of adjusting the water inlet, and the effect is also better than that of the structure in which only one set of roller assembly 190 is arranged on one side of the guide portion 160.

[0022] Specifically, as shown in Figure 2 and Figure 3 , the roller assembly 190 can include a mounting seat and a roller 170, the mounting seat is arranged perpendicular to the length direction of the door beam 100, and the length of the mounting seat is greater than the width of the door beam 100, both ends of the mounting seat are located outside the door beam 100, and the roller 170 is rotatably arranged at both ends of the mounting seat respectively, so that the two rollers 170 correspond to the positions outside the door beam 100 respectively, which is beneficial to reduce the gap between the door beam 100 and the limiting guide rail 221, better guarantee the stability of the door beam 100 moving along the limiting guide rail 221, and facilitate the water stop structure to be arranged; at the same time, the two rollers 170 can form balanced rolling support above and below the guide portion 160, further improving the stability of the door beam 100 operation.

[0023] Preferably, as shown in Figure 2 , the mounting portion is an angle steel structure 180, the angle steel structure 180 is arranged towards the corresponding guide portion 160, one side plate of the angle steel structure 180 is fixed with the door beam 100, and the roller 170 is rotatably arranged at both ends of the side plate respectively, and the other side plate of the angle steel structure 180 is away from the guide portion 160, so as to play a protection role on the rollers 170 and the limiting guide rail 221 structure inside; it is easy to understand that the roller 170 can be detachably connected with the one side plate of the angle steel structure 180 through a bolt structure, so as to facilitate the mounting and dismounting operation of the roller 170.

[0024] Based on the above-mentioned door beam 100 structure, the embodiment also discloses a flexible water gate, the disclosed flexible water gate can include a plurality of door beams arranged in sequence along the water level elevation direction, and as shown in Figure 1 , the door beam adopts the door beam 100 structure described above in the embodiment, and the flexible door leaf 110 is arranged between the two adjacent door beams 100, so as to realize the folding drainage and stretching water isolation of the flexible door leaf 110 through the relative and opposite operation of the two adjacent door beams 100; generally, the flexible door leaf 110 can select the existing high-strength curtain, and the guide portion 160 can be arranged as a square pad or gasket structure.

[0025] At the same time, as shown in Figure 2 and Figure 3As shown, the inner walls on both sides of the pier slot 220 are respectively provided with a limiting guide rail 221 extending in the vertical direction, and the limiting guide rail 221 protrudes from the inner wall of the pier slot 220. The limiting part is located in the guide groove of the corresponding limiting guide rail 221 and is in limiting sliding cooperation with the guide groove. The two groups of rollers 170 are respectively in rolling cooperation with the outer walls on both sides of the corresponding limiting guide rail 221.

[0026] Preferably, as Figure 1 As shown, the roller assemblies 190 of the adjacent two door beams 100 are located on the opposite sides of the door beam 100, which is more conducive to the balanced operation of the flexible water gate compared to the setting that all the roller assemblies 190 of the door beams 100 are located on the same side of the door beam 100. In order to ensure the water stopping effect of the flexible leaf 110, the flexible leaf 110 can be provided as a water stopping structure that is attached to the pier wall surface 200 on both sides of the pier slot 220. The water stopping structure is a structural member made of rubber material to ensure the smooth operation of the folding and stretching of the flexible leaf 110.

[0027] In this embodiment, in order to improve the water stopping effect of the flexible leaf 110, an abutting piece can also be provided on both sides of the door beam 100 near the flexible leaf 110, and the abutting piece is located on the side of the door beam 100 where the flexible leaf 110 is located. When the flexible leaf 110 is in the stretched state, the abutting piece abuts against the side edge of the flexible leaf 110, thereby reducing the risk of increasing the upstream and downstream leakage caused by deformation or movement of the flexible leaf 110, effectively improving the water stopping effect of the flexible leaf 110, and further ensuring the stability of the layered water temperature and the safe operation of the project.

[0028] As Figure 4 As shown, as one of the implementable ways of the abutting piece, the abutting piece is a connecting rod structure. The two ends of the connecting rod structure are respectively connected with the adjacent two door beams 100, and the connecting rod structure has an open state and a folded state. When the flexible leaf 110 is in the folded state, the connecting structure is also rotated to the folded state. When the flexible leaf 110 is in the stretched state, the connecting rod structure is rotated to the open state and abuts against the side edge of the flexible leaf 110, thereby avoiding deformation and movement of the side edge of the flexible leaf 110, maintaining effective contact between the flexible leaf 110 and the pier wall surface 200, strengthening the water stopping effect at the side edge of the flexible leaf 110, and more effectively adjusting the water level in front of and behind the water retaining building, and improving the downstream water temperature.

[0029] The connecting rod structure can also support the door beam 100 and the flexible door leaf 110, and when the flexible door leaf 110 is partially damaged or torn, the connecting rod structure can support the self-weight of the door beam 100 and the flexible door leaf 110, thereby reducing the force on the flexible door leaf 110 and reducing the risk of further damage to the flexible water-blocking door.

[0030] In addition, the connecting rod structure can also support the door beam 100 and the flexible door leaf 110. When the flexible door leaf 110 is partially damaged or torn, the connecting rod structure can support the self-weight of the door beam 100 and the flexible door leaf 110, thereby reducing the force on the flexible door leaf 110 and reducing the risk of further damage to the flexible water-blocking door.

[0031] It should be noted that when the flexible door leaf 110 is in the stretched water-blocking state, the first connecting rod 120 and the second connecting rod 130 are opened, and the included angle thereof is less than 180°, as shown in FIG. 8, so as to avoid affecting the rotating and folding action of the first connecting rod 120 and the second connecting rod 130 due to the complete vertical opening state of the first connecting rod 120 and the second connecting rod 130, so as to ensure the smooth completion of the folding operation of the flexible door leaf 110. Figure 4

[0032] Therefore, the sum of the lengths of the first connecting rod 120 and the second connecting rod 130 can be designed to be greater than the height of the flexible door leaf 110 after stretching; at the same time, the sum of the lengths of the first connecting rod 120 and the second connecting rod 130 is less than or equal to the length of the door beam 100, so that the connecting rod structure can meet the operation requirements of the flexible door leaf 110 in the stretched water-blocking state, and can also avoid mutual interference of the first connecting rod 120 and the second connecting rod 130 when rotating and folding, thereby affecting the folding operation of the flexible door leaf 110.

[0033] Preferably, at least one of the first connecting rod 120 and the second connecting rod 130 is provided with an elastic expansion structure. During the movement of the two adjacent door beams 100 along the pier door slot 220 towards or away from each other, when the left and right ends of the door beam 100 move up and down along the pier door slot 220 are unbalanced, the elastic expansion structure can play a buffering role to make the first connecting rod 120 and / or the second connecting rod 130 adaptively expand and contract, thereby ensuring the balanced operation of the door beam 100 and avoiding the tilting and self-locking phenomenon caused by the unbalanced operation of the door beam 100.

[0034] As an implementable mode of the elastic expansion structure, as shown in FIG. 9, the elastic expansion structure can be a spring. Figure 5 ​As shown, the elastic telescopic structure can be a spring structure 150; at the same time, a hinge 140 can be set at the other end of the first connecting rod 120, and a second guide hole 131 adapted to the hinge 140 can be set at the other end of the second connecting rod 130, and the second guide hole 131 extends along the length direction of the second connecting rod 130; the hinge 140 passes through the second guide hole 131 and slides with the second guide hole 131; one end of the spring structure 150 is fixedly set on the second connecting rod 130, and the other end of the spring structure 150 is connected to the hinge 140.

[0035] When the left and right ends of the door beam 100 are subjected to unbalanced forces, the first connecting rod 120 and the second connecting rod 130 enable the hinge 140 to adaptively move along the second guide hole 131 through the elastic expansion and contraction action of the spring structure 150, thereby achieving adaptive adjustment of the first connecting rod 120 and the second connecting rod 130 to maintain balanced operation of the door beam 100.

[0036] Better, if Figure 5 As shown, a first guide hole 121 can also be provided at the other end of the first connecting rod 120, and the first guide hole 121 extends along the length direction of the first connecting rod 120; the hinge 140 passes through the first guide hole 121 and the second guide hole 131, and slides with the first guide hole 121 and the second guide hole 131, so that the hinge 140 can adaptively move along the first guide hole 121 and the second guide hole 131 through the elastic expansion and contraction action of the spring structure 150, so that the adaptive adjustment of the first connecting rod 120 and the second connecting rod 130 is more flexible, and the balanced operation of the door beam 100 is better maintained.

[0037] It is easy to understand that the hinge 140 can be a bearing structure, so that the bearing structure can not only reduce the friction of the relative rotation of the first connecting rod 120 and the second connecting rod 130, but also has a higher structural strength to ensure the supporting effect of the connecting rod structure on the door beam 100 and the flexible door leaf 110.

[0038] Specifically, if Figure 4 and Figure 5 As shown, the outer ring of the bearing structure is connected to the first guide part, and the inner ring of the bearing structure is connected to the second guide part. The first guide part passes through the first guide hole 121 and is connected to the first limiting part, and the second guide part passes through the second guide hole 131 and is connected to the second limiting part. Usually, the first guide part and the second guide part are both configured as screw structures, and the first limiting part and the second limiting part are both configured as nut structures that are tightly matched with the screw structure, thereby facilitating the assembly and disassembly of the first connecting rod 120, the second connecting rod 130 and the bearing structure.

[0039] Of course, as other implementable manners, the elastic extension structure can also be a spring structure to replace the spring structure 150 described above; or the first connecting rod 120 and the second connecting rod 130 can also be provided as an existing elastic extension rod structure; and the hinge 140 described above can also be provided as an existing rivet or pin shaft structure.

[0040] In the embodiment, as another implementable manner of the abutting member, as shown in Figure 6 , the abutting member can also be provided as a pressing piece 300; one end of the pressing piece 300 is fixedly connected with the door beam 100, and the other end of the pressing piece 300 is a flexible free end; when the side edge portion of the flexible door leaf 110 is attached to the pier wall surface 200, the flexible free end of the pressing piece 300 is in a curved or bent state, used to abut against the side edge portion of the flexible door leaf 110 and generate a spring force to press the side edge portion of the flexible door leaf 110 to be attached to the pier wall surface, so as to avoid deformation and movement of the side edge of the flexible door leaf 110, keep the flexible door leaf 110 in effective contact with the pier wall surface 200, strengthen the water stopping effect at the side edge of the flexible door leaf 110, and more effectively adjust the water level in front of and behind the water-stopping building and improve the discharged water temperature.

[0041] In order to ensure the water stopping effect of the side edge portion of the flexible door leaf 110 on the pier wall surface 200, as shown in Figure 4 and Figure 6 , a water stopping strip 210 can also be provided on the pier; the water stopping strip 210 corresponds to the side edge portion of the flexible door leaf 110 and is vertically arranged along the water level elevation direction; when the side edge portion of the flexible door leaf 110 is attached to the pier wall surface 200, the edge thereof can abut against the water stopping strip 210, so that the water stopping effect of the side edge portion of the flexible door leaf 110 can be better improved through the water stopping strip 210.

[0042] Preferably, a gap is provided between the side of the water stopping strip 210 facing the side edge portion of the flexible door leaf 110 and the pier, used for the side edge of the flexible door leaf 110 to be embedded, and the height of the gap is less than the thickness of the side edge of the flexible door leaf 110, so that the gap formed between the water stopping strip 210 and the pier wall surface 200 can not only ensure the close attachment of the side edge portion of the flexible door leaf 110 to the pier wall surface 200, but also make the side edge portion of the flexible door leaf 110 be subjected to uniform and consistent pressing force, ensure the water stopping effect of the entire side edge portion of the flexible door leaf 110, and make the side edge portion of the flexible door leaf 110 be able to withstand the lateral water pressure without deformation and displacement, keep the side edge portion of the flexible door leaf 110 straight, not only ensure the water stopping effect, but also avoid affecting the orderly folding of the flexible door leaf 110 due to the deformation and displacement of the side edge portion of the flexible door leaf 110, and further ensure the safe operation of the flexible water-stopping building.

[0043] It is easy to understand that the above gap is preferably designed as a flared structure, that is, the height of the gap gradually decreases from the gap entrance to the gap interior, so that the flexible door leaf 110 side edge portion can be more easily embedded in the gap through the flared structure; specifically, the water stop 210 can be a rubber rod, and the cross-sectional shape of the rubber rod is circular or elliptical, so that when the circular or elliptical rubber rod is fixedly arranged on the pier wall surface 200, it can be tangent to the surface of the pier to form a gap with a flared structure.

[0044] The above embodiments of the present application mainly describe the differences between the various embodiments, and the different optimization features between the various embodiments can be combined to form a better embodiment as long as they are not contradictory. Considering the brevity of the writing, it will not be repeated here.

[0045] The above only describes the embodiments of the present application and is not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the scope of the claims of the present application.

Claims

1. A door beam for a flexible watertight door, characterized in that: The front side and rear side of the door beam are respectively provided with guide parts near the two end portions, and the guide parts are respectively used to slide and cooperate with the guide grooves of the limiting guide rails in the gate grooves of the pier; the door beam is also respectively provided with two groups of roller assemblies near the two end portions, and the two groups of roller assemblies are located on the front side or rear side of the door beam, and are respectively close to the outer side and inner side of the guide part on that side, and are used to roll and cooperate with the outer walls on both sides of the limiting guide rails.

2. The door beam for a flexible watertight door according to claim 1, characterized in that: The roller assembly includes a mounting seat and a roller. The mounting seat is arranged perpendicular to the length direction of the door beam, and the length of the mounting seat is greater than the width of the door beam. Both ends of the mounting seat are located outside the door beam and are respectively rotatably provided with the roller.

3. The door beam for a flexible watertight door according to claim 2, characterized in that: The mounting portion is an angle steel structure, which is arranged toward the corresponding guide portion. One side plate of the angle steel structure is fixed to the door beam, and the rollers are rotatably arranged at both ends of the side plate. The other side plate of the angle steel structure is away from the guide portion.

4. The door beam for a flexible watertight door according to claim 3, characterized in that: The roller is detachably connected to a side plate of the angle steel structure through a bolt structure.

5. The door beam for a flexible watertight door according to any one of claims 1 to 4, characterized in that: The door beam is further provided with abutments on both sides adjacent to the flexible door leaf, and the abutments are located on the side of the door beam where the flexible door leaf is located; when the flexible door leaf is in an extended state, the abutments abut against the side portion of the flexible door leaf.

6. The door beam for a flexible watertight door according to claim 5, characterized in that: The abutment is a pressing plate; one end of the pressing plate is fixedly connected to the door beam, and the other end of the pressing plate is an elastic free end; when the side portion of the flexible door leaf is in contact with the wall surface of the gate pier, the elastic free end of the pressing plate is in a bent or folded state, which is used to abut against the side portion of the flexible door leaf and generate an elastic force to squeeze the side portion of the flexible door leaf against the pier wall surface.

7. The door beam for a flexible watertight door according to claim 5, characterized in that: The abutment is a connecting rod structure; the two ends of the connecting rod structure are respectively connected to the two adjacent door beams, and the connecting rod structure has an open state and a folded state; when the flexible door leaf is in the folded state, the connecting structure also rotates to the folded state; when the flexible door leaf is in the extended state, the connecting rod structure rotates to the open state and abuts against the side part of the flexible door leaf.

8. A flexible water barrier gate, comprising a plurality of gate beams arranged in sequence along the water level elevation direction, wherein both ends of the gate beams are slidably disposed in corresponding gate slots of the gate piers, and flexible gate leaves are disposed between adjacent gate beams; characterized in that: The door beam is a door beam structure according to any one of claims 1 to 7, and the inner walls on both sides of the gate pier gate slot are respectively provided with limiting guide rails extending in the vertical direction, and the limiting guide rails protrude from the inner side walls of the gate pier gate slot, and the limiting portion is located in the guide groove of the corresponding limiting guide rail and is slidingly engaged with the guide groove, and the two sets of rollers are respectively rolling engaged with the outer walls on both sides of the corresponding limiting guide rails.

9. The flexible watertight door according to claim 8, characterized in that: The roller assemblies of two adjacent door beams are located on different sides of the door beams.

10. The flexible watertight door according to claim 8 or 9, characterized in that: The edges of both sides of the flexible gate leaf facing the gate groove of the gate pier are respectively provided with water-stopping structures for fitting with the wall surface of the gate pier. The water-stopping structures are structural parts made of rubber material.

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