Door beam and flexible waterproof door

Abstract

The invention discloses a door beam and a flexible waterproof door. Guiding parts are arranged at the positions, close to the two ends, of the front side face and the rear side face of the door beam correspondingly, the guiding parts are used for being in limiting moving fit with guiding grooves of limiting guide rails in gate grooves of gate piers correspondingly, and a plurality of universal balls are arranged on the faces, away from the door beam, of the guiding parts and distributed around the centers of the guiding parts at intervals. The guide part is in rolling fit with the guide groove; the positions, close to the two ends, of the door beam are each provided with a roller assembly, and the roller assemblies are located on the same side of the door beam. The roller assemblies are located on the front side face or the rear side face of the door beam and close to the corresponding guide parts on the side, and the roller assemblies are used for being in rolling fit with the outer side walls of the limiting guide rails. 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 particularly relates to a door beam and a flexible water-blocking door. BACKGROUND

[0002] In the field of water conservancy and hydropower engineering, the construction of a high dam reservoir will cause the water flow rate in the reservoir area to decrease, thereby causing the phenomenon of stratification of water temperature in the reservoir area, and ensuring that the water temperature discharged by the river is suitable is a key measure to maintain the health of the aquatic ecosystem; at present, to control the water temperature of the discharged water flow, stratified water taking is an important way, and in actual engineering, as an important way for stratified water taking of the discharged water flow, a multi-layer water taking device, such as a flexible water-blocking door, is usually arranged.

[0003] In the Chinese invention patent with the patent number CN118326912A, a flexible water-blocking door stratified water taking device is disclosed, which mainly consists of a frame main beam and flexible door leaves, and the folding and stretching of the flexible door leaves are realized by the sliding cooperation of the water-blocking door assembly and the door slot structure; this structure enables the water-blocking door assembly to be shrunk and expanded in the water level elevation direction, thereby adjusting the water taking depth and the water taking opening degree, but the sliding friction between the water-blocking door frame main beam and the door slot will cause the opening and closing resistance to be large, and the self-locking problem is prone to occur during operation. SUMMARY

[0004] The present application discloses a door beam and a flexible water-blocking door to solve the problem of large opening and closing force and easy self-locking during operation of the current flexible water-blocking door, and improve the safety of the operation of the flexible water-blocking door and ensure the timeliness of the inlet 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-blocking door, the front side and the rear side of the door beam are provided with guide portions near the positions of the two end portions, respectively, the guide portions are respectively used for limiting movement cooperation with the guide grooves of the limiting guide rails in the gate piers and door slots, and one side of the guide portion away from the door beam is provided with a plurality of universal ball bearings, and the plurality of universal ball bearings are distributed around the center of the guide portion, which are used for rolling cooperation between the guide portion and the guide groove; the positions near the two end portions of the door beam are also respectively provided with a group of roller assemblies, and the roller assemblies are located on the same side of the door beam; the roller assemblies are located on the front side or the rear side of the door beam and are adjacent to the corresponding guide portions on the side, respectively, and the roller assemblies are used for rolling cooperation with the outer side walls of the limiting guide rails.

[0006] Optionally, the roller assembly comprises a mounting seat and a roller, the mounting seat is arranged perpendicular to the length direction of the door beam, the length of the mounting seat is greater than the width of the door beam, and both ends of the mounting seat are located outside the door beam and are respectively provided with the roller.

[0007] Optionally, the mounting part is an angle steel structure, which is arranged towards the corresponding guide part, one side plate of the angle steel structure is fixed with the door beam, the rollers are respectively 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 angle steel structure is located outside the guide part.

[0009] Optionally, the rollers are detachably connected with the angle steel structure through a bolt structure.

[0010] Optionally, the number of the universal ball bearings is four, which correspond to four end points of a rectangle, and the center of the rectangle corresponding to the four universal ball bearings coincides with the center of the guide part.

[0011] In a second aspect, based on the above-mentioned door beam, the application further provides a flexible water gate, which comprises a plurality of door beams arranged in sequence along the water level elevation direction, both ends of the door beam are respectively arranged in the corresponding gate pier slot in a sliding manner, and a flexible gate leaf is arranged between adjacent door beams; the door beam is the door beam with the above-mentioned structure, the inner walls of both sides of the gate pier slot are respectively provided with a limiting guide rail extending in the vertical direction, the limiting guide rail protrudes from the inner wall of the gate pier slot, the limiting part is respectively located in the guide groove of the corresponding limiting guide rail, and the limiting part is limited and rolled in cooperation with the guide groove, and the roller assembly is rolled in cooperation with one side outer wall of the limiting guide rail.

[0012] Optionally, the roller assemblies of two adjacent door beams are located at different sides of the door beam.

[0013] Optionally, the flexible gate leaf is respectively provided with a water stop structure for abutting with the wall surface of the gate pier at both side edges of the gate pier slot, and the water stop structure is a structural member made of rubber material.

[0014] Optionally, the door beam is further respectively provided with an abutting piece at positions adjacent to both side edges of the flexible gate leaf, and the abutting piece is located at one side of the door beam where the flexible gate leaf is located; when the flexible gate leaf is in an extended state, the abutting piece abuts against the side edge part of the flexible gate leaf.

[0015] The technical scheme adopted by the application can achieve the following beneficial effects: The door beam and the flexible water isolation door disclosed by the application form a first part limiting structure through rolling cooperation of the roller assembly and the outer wall of one side of the limiting guide rail, which can play a limiting role on the guide part, prevent collision and friction between the guide part and the guide groove of the limiting guide rail, form a two-part limiting structure with the second part limiting structure formed by the guide part and the guide groove of the limiting guide rail, better ensure the movement of the door beam along the limiting groove of the limiting guide rail, prevent collision between the door beam and the gate pier door groove, and the roller assembly also has the advantage of small friction. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings: Figure 1 It is a structural schematic view of the flexible water isolation door disclosed in the embodiments of the application; Figure 2 It is a structural schematic view of the guide part disclosed in the embodiments of the application; Figure 3 It is a top view structural schematic view of the guide part and the roller assembly disclosed in the embodiments of the application; Figure 4 It is a side view structural schematic view of the guide part and the roller assembly disclosed in the embodiments of the application; Figure 5 It is a schematic view of the connecting rod structure disclosed in the embodiments of the application; Figure 6 It is a connecting structure schematic view of the first connecting rod and the second connecting rod disclosed in the embodiments of the application; Figure 7 It is a schematic view of the pressing plate structure disclosed in the embodiments of the 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 part, 161-universal ball, 170-roller, 180-angle steel structure, 190-roller assembly, 200-gate pier wall surface, 210-sealing strip, 220-gate pier door groove, 221-limiting guide rail, 300-pressing plate. DETAILED DESCRIPTION

[0017] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described below in connection with the embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

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

[0019] Please refer to Figures 1 to 7 As shown in the drawings, the embodiments of the present application disclose a door beam 100 for a flexible water gate; the door beam 100 is provided with a guide portion 160 at a position close to each end of the front side and the rear side of the door beam 100, respectively, the guide portion 160 is used for limiting movement with a guide groove of a limiting guide rail 221 in a gate pier door slot 220, respectively, and a plurality of universal ball bearings 161 are arranged on a side of the guide portion 160 away from the door beam 100, and the plurality of universal ball bearings 161 are distributed around the center of the guide portion 160, for rolling cooperation between the guide portion 160 and the guide groove. The door beam 100 is also provided with a group of roller assemblies 190 at a position close to each end of the door beam 100, respectively, the roller assemblies 190 are all located on the same side of the door beam 100, that is, the roller assemblies 190 are all located on the front side of the door beam, or all located on the rear side of the door beam 100, and are close to the corresponding guide portion 160 on the side, respectively, the roller assemblies 190 are used for rolling cooperation with the outer wall of the limiting guide rail 221.

[0020] Among them, the first part of the limiting structure is formed by rolling cooperation between the roller assembly 190 and the outer wall of one side of the limiting guide rail 221, which can not only limit the guide portion 160 to prevent collision and friction between the guide portion 160 and the guide groove of the limiting guide rail 221, but also form a second part of the limiting structure with the guide groove of the limiting guide rail 221 to form a two-part 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 gate pier door slot 220, and the roller assembly 190 also has the advantage of small friction; and the universal ball bearings 161 can effectively reduce the friction when the guide portion 160 moves along the limiting groove of the limiting guide rail 221, and the effect of the universal ball bearings is better than that of the roller shaft and other structures.

[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 slot 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 intake water gap.

[0022] Specifically, as shown in Figure 2 , the guide part 160 can be provided in the form of a square pad or a gasket structure, and the number of universal ball bearings 161 is 4, which correspond to the four endpoints of the rectangle respectively, and the center of the rectangle corresponding to the four universal ball bearings 161 coincides with the center of the guide part 160, ensuring the stability of the movement of the guide part 160 along the guide groove of the limiting guide rail 221.

[0023] At the same time, as shown in Figure 3 and Figure 4 , 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 conducive to reducing the gap between the door beam 100 and the limiting guide rail 221, better guaranteeing the stability of the movement of the door beam 100 along the limiting guide rail 221, and facilitating the arrangement of the water stop structure; at the same time, the two rollers 170 can form balanced rolling support above and below the guide part 160, further improving the stability of the operation of the door beam 100.

[0024] Preferably, as shown in Figure 2 and Figure 3 , the mounting part is an angle steel structure 180, the angle steel structure 180 is arranged towards the corresponding guide part 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 part 160, so as to play a protective role on the rollers 170 inside the angle steel structure 180 and the limiting guide rail 221 structure.

[0025] More preferably, as shown in Figure 3 , the angle steel structure 180 is located outside the guide part 160, so that the vertical side plate of the angle steel structure 180 is located between the roller 170 and the bottom surface of the gate pier door slot 220, which can avoid the collision between the roller assembly 190 and the bottom surface of the gate pier door slot 220, and better guarantee the safe operation of the door beam 100; it is easy to understand that the roller 170 can be detachably connected with 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.

[0026] Based on the door beam 100 structure described above, the embodiment also discloses a flexible water gate, which can include a plurality of door beams arranged in sequence along the water level elevation direction, and as shown in the drawings, the door beam adopts the door beam 100 structure described above, and a flexible leaf 110 is arranged between two adjacent door beams 100, so that the folding and draining and the stretching and water sealing of the flexible leaf 110 are realized by the relative and opposite operation of the two adjacent door beams 100; generally, the flexible leaf 110 can be selected from the existing high-strength curtain. Figure 1

[0027] Meanwhile, as shown in the drawings, Figure 3 and Figure 4 the inner walls of the two sides of the gate pier slot 220 are respectively provided with a limiting guide rail 221 extending in the vertical direction, the limiting guide rail 221 protrudes from the inner side wall of the gate pier slot 220, the limiting part 160 is located in the guide groove of the corresponding limiting guide rail 221, and the limiting part 160 is limited and guided by rolling cooperation with the guide groove, so as to reduce the friction between the guide part 160 and the guide groove, and the roller assembly 190 is in rolling cooperation with the outer wall of one side of the limiting guide rail 221, so as to limit and guide the movement of the guide part 160 along the guide groove.

[0028] Preferably, as shown in the drawings, Figure 1 the roller assemblies 190 of the two adjacent 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 with the setting that the roller assemblies 190 of all the door beams 100 are located on the same side of the door beam 100. Among them, the limiting guide rails 221 can be arranged at the slot positions adjacent to the gate pier slot 220, so as to facilitate reducing the design depth of the gate pier slot 220.

[0029] Generally, in order to ensure the water sealing effect of the flexible leaf 110, the flexible leaf 110 can be arranged as a water sealing structure that is attached to the gate pier wall surface 200 towards the two side parts of the gate pier slot 220, and the water sealing structure is a structural member made of rubber material, so as to ensure the smooth operation of the folding and stretching of the flexible leaf 110.

[0030] The flexible water gate disclosed in the embodiment can also be provided with an abutting piece at the position of the two side edges of the door beam 100 adjacent to 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 part of the flexible leaf 110, so as to reduce the risk of increasing the upstream and downstream leakage caused by the deformation or movement of the flexible leaf 110, effectively improve the water sealing effect of the flexible leaf 110, and further ensure the stable water temperature of layered water taking and the safe operation of the project.

[0031] As shown in the drawings, Figure 5 ​As shown, as an implementable mode of the abutting member, the abutting member is a link structure; two ends of the link structure are connected with two adjacent door beams 100 respectively, and the link structure has an unfolded state and a folded state; when the flexible door leaf 110 is in the folded state, the connecting structure is also rotated to the folded state; when the flexible door leaf 110 is in the unfolded state, the link structure is rotated to the unfolded state and abuts against the side edge part of the flexible door leaf 110, 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-blocking building to improve the discharged water temperature.

[0032] Wherein, the link structure at two ends of the adjacent door beams 100 can also limit and guide the folding and unfolding of the door beams 100 and the flexible door leaf 110, so as to ensure that the door beams 100 fold and unfold the flexible door leaf 110 in the rotation plane of the first link 120 and the second link 130, thereby better reducing the risk of friction and collision between the door beams 100 and the pier door groove 220, and avoiding the problems of strength reduction caused by deformation of the door beams 100 and water leakage and imbalance caused by damage of the door groove.

[0033] In addition, the link structure can also support the door beams 100 and the flexible door leaf 110, and when the flexible door leaf 110 is partially damaged or torn, the link structure can support the self-weight of the door beams 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.

[0034] It should be noted that when the flexible door leaf 110 is in the unfolded water-blocking state, the first link 120 and the second link 130 are unfolded, and the included angle thereof is less than 180°, which can be seen from Figure 5 Thus, the unfolded first link 120 and the unfolded second link 130 do not affect the rotation and folding of the first link 120 and the second link 130, so as to ensure the smooth folding of the flexible door leaf 110.

[0035] Therefore, the sum of the lengths of the first link 120 and the second link 130 can be designed to be greater than the height of the unfolded flexible door leaf 110; at the same time, the sum of the lengths of the first link 120 and the second link 130 is less than or equal to the length of the door beam 100, so that the link structure can meet the operation requirements of the unfolded flexible door leaf 110 and avoid mutual interference of the first link 120 and the second link 130 when they are rotated and folded, thereby affecting the folding of the flexible door leaf 110.

[0036] Preferably, at least one of the first link 120 and the second link 130 is provided with an elastic extension structure; during the movement of the two adjacent door beams 100 along the pier door groove 220 towards or away from each other, when the left and right ends of the door beam 100 appear to be unbalanced in force during the lifting movement along the pier door groove 220, the elastic extension structure can play a buffering role to make the first link 120 and / or the second link 130 adaptively extend and contract, so as to ensure the balanced operation of the door beam 100 and avoid the tilting and self-locking phenomenon caused by the unbalanced operation of the door beam 100.

[0037] As an implementable mode of the elastic extension structure, as shown in Figure 6 , the elastic extension structure can be a spring structure 150; at the same time, a hinge 140 can be arranged at the other end of the first link 120, a second guide hole 131 adapted to the hinge 140 is arranged at the other end of the second link 130, and the second guide hole 131 extends along the length direction of the second link 130; the hinge 140 passes through the second guide hole 131 and is in sliding fit with the second guide hole 131; one end of the spring structure 150 is fixedly arranged on the second link 130, and the other end of the spring structure 150 is connected with the hinge 140.

[0038] When the left and right ends of the door beam 100 are unbalanced in force, the first link 120 and the second link 130 make the hinge 140 adaptively move along the second guide hole 131 through the elastic extension of the spring structure 150, so as to realize the adaptive adjustment of the first link 120 and the second link 130 to maintain the balanced operation of the door beam 100.

[0039] More preferably, as shown in Figure 6 , a first guide hole 121 can also be arranged at the other end of the first link 120, and the first guide hole 121 extends along the length direction of the first link 120; the hinge 140 passes through the first guide hole 121 and the second guide hole 131 and is in sliding fit 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 extension of the spring structure 150, so that the adaptive adjustment of the first link 120 and the second link 130 is more flexible, and the balanced operation of the door beam 100 is better maintained.

[0040] It is easy to understand that the hinge 140 can be a bearing structure, so that not only the friction force of the relative rotation of the first link 120 and the second link 130 can be reduced, but also the bearing structure has high structural strength to ensure the support of the link structure to the door beam 100 and the flexible door leaf 110.

[0041] Specifically, as shown in Figure 5 and Figure 6As shown, the outer ring of the bearing structure is connected with a first guide part, the inner ring of the bearing structure is connected with a second guide part, the first guide part passes through the first guide hole 121 and is connected with the first limiting part, the second guide part passes through the second guide hole 131 and is connected with the second limiting part; usually, the first guide part and the second guide part are both provided as screw rod structures, and the first limiting part and the second limiting part are both provided as nut structures which are tightly matched with the screw rod structures, so as to facilitate the assembly, disassembly and other operations of the first connecting rod 120, the second connecting rod 130 and the bearing structure.

[0042] Of course, as other implementable manners, the elastic telescopic 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 existing elastic telescopic rod structures; the hinge 140 described above can also be provided as an existing rivet or pin shaft structure.

[0043] In the embodiment, as another implementable manner of the abutting part, as shown in Figure 7 As shown, the abutting part 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 an elastic free end; when the side edge part of the flexible door leaf 110 is attached to the pier wall surface 200, the elastic free end of the pressing piece 300 is in a curved or bent state, used for abutting against the side edge part of the flexible door leaf 110 and generating an elastic force for pressing and attaching the side edge part of the flexible door leaf 110 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, more effectively adjust the water levels in front of and behind the water-stopping building, and improve the discharged water temperature.

[0044] In order to ensure the water stopping effect of the side edge part of the flexible door leaf 110 to the pier wall surface 200, as shown in Figure 5 and Figure 7 As shown, a water stopping strip 210 can also be arranged on the pier, the water stopping strip 210 corresponds to the side edge part of the flexible door leaf 110 and is vertically arranged along the water level elevation direction; when the side edge part 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 strip 210 can better improve the water stopping effect of the side edge part of the flexible door leaf 110.

[0045] Preferably, a gap is provided between the side of the water stop strip 210 facing the side portion of the flexible door leaf 110 and the gate pier for embedding the side edge of the flexible door leaf 110, and the height of the gap is less than the side thickness of the flexible door leaf 110. Thus, the gap formed between the water stop strip 210 and the gate pier wall 200 can ensure that the side portion of the flexible door leaf 110 is closely fitted to the gate pier wall 200, and the side portion of the flexible door leaf 110 is subjected to a uniform and consistent pressing force, thereby ensuring the water-stopping effect of the entire side portion of the flexible door leaf 110. The side portion of the flexible door leaf 110 can also withstand lateral water pressure without deformation and displacement, thereby keeping the side portion of the flexible door leaf 110 straight, which not only ensures the water-stopping effect, but also avoids the deformation and displacement of the side portion of the flexible door leaf 110 affecting the orderly folding of the flexible door leaf 110, thereby ensuring the safe operation of the flexible water-proof structure.

[0046] It is easy to understand that the above-mentioned gap is preferably designed to have a flared structure, that is, the height of the gap gradually decreases from the gap entrance to the inside of the gap, so that the side part of the flexible gate leaf 110 can be more easily embedded in the gap through the flared structure; specifically, the water stop strip 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 fixed to the pier wall 200, it can be tangent to the surface of the pier to form a gap with a flared structure.

[0047] The above embodiments of the present invention focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0048] The foregoing is merely an embodiment of the present invention and is not intended to limit the present invention. It will be apparent to those skilled in the art that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are intended to be included within the scope of the claims of the present invention.

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 cooperate with the guide grooves of the limiting guide rails in the gate grooves of the piers, and a plurality of universal ball bearings are provided on the side of the guide part away from the door beam, and the plurality of universal ball bearings are spaced around the center of the guide part for rolling cooperation between the guide part and the guide groove; a group of roller assemblies are also respectively provided near the two end portions of the door beam, and the roller assemblies are all located on the same side of the door beam; the roller assemblies are located on the front side or rear side of the door beam and are respectively adjacent to the guide parts corresponding to that side, and the roller assemblies are used to rolling cooperation with the outer side wall of the limiting guide rail.

2. The door beam 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 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 according to claim 3, characterized in that: The angle steel structure is located outside the guide portion.

5. The door beam according to claim 4, characterized in that: The roller is detachably connected to the angle steel structure via a bolt structure.

6. The door beam according to any one of claims 1 to 5, characterized in that: The number of the universal ball transfers is 4, and they correspond to the four end points of the rectangle respectively, and the centers of the rectangles corresponding to the 4 universal ball transfers coincide with the center of the guide portion.

7. 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 the door beam according to any one of claims 1 to 6, 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 parts are respectively located in the guide grooves of the corresponding limiting guide rails, and are limited and rolled with the guide grooves through the universal ball, and the roller assembly is rolled with the outer wall of one side of the limiting guide rail.

8. The flexible watertight door according to claim 7, characterized in that: The roller assemblies of two adjacent door beams are located on different sides of the door beams.

9. The flexible watertight door according to claim 7 or 8, 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.

10. The flexible watertight door according to claim 9, 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.

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