Hydraulic construction cofferdam device

Abstract

The present invention relates to a cofferdam device for water conservancy construction, belonging to the technical field of cofferdam facilities. It includes an upper bracket, a lower bracket, an enclosing plate arranged between the upper bracket and the lower bracket, and a support frame arranged inside the enclosing plate. The upper bracket, the lower bracket, and the enclosing plate are all annular. An upper insertion groove matching with the enclosing plate is formed on the bottom surface of the upper bracket, and a lower insertion groove matching with the enclosing plate is formed on the top surface of the lower bracket. A water stop ring for inserting into the riverbed is fixedly connected to the bottom surface of the lower bracket; the support frame includes a plurality of fixing members arranged on the inner side wall of the upper bracket and support members connected one by one between every two adjacent fixing members. Through the present invention, the problem that the internal support of the existing water conservancy cofferdam occupies a large space and causes inconvenience in construction is solved.

Description

Technical Field

[0001] The present invention relates to a cofferdam device for water conservancy construction, belonging to the technical field of cofferdam facilities. Background Art

[0002] A cofferdam refers to a temporary enclosure structure built in water conservancy project construction for constructing permanent water conservancy facilities. Its function is to prevent water and soil from entering the construction location of the building, so as to drain water inside the cofferdam, excavate the foundation pit, and build the building. Generally, it is mainly used in hydraulic construction. Except as a part of the formal building, the cofferdam is generally demolished after use.

[0003] The steel sheet pile cofferdam is the most commonly used type of sheet pile cofferdam. The steel sheet pile is a type of profiled steel with a locking groove. Its cross-section has straight plate shape, trough shape, Z shape, etc., and has various sizes and interlocking forms. Common ones include Larsen type, Lackawanna type, etc. Its advantages are: high strength, easy to drive into hard soil layers; can be constructed in deep water with good waterproof performance; can be formed into cofferdams of various shapes as needed and can be reused multiple times. Therefore, it has a wide range of uses. It is commonly used in the cofferdam on the top of the caisson in bridge construction, the cofferdams for pipe column foundation, pile foundation, and open cut foundation, etc. These cofferdams mostly adopt a single-wall closed cofferdam with longitudinal and transverse supports inside, and diagonal supports are added when necessary to form a cage.

[0004] After retrieval, a water conservancy project construction cofferdam water-stop structure and its construction method disclosed in a Chinese patent with the publication number of CN113293782B have technical key points as follows: including a cofferdam body in a rectangular structure, and also including positioning piles vertically fixed in the middle of the cofferdam body and several support frames for supporting the cofferdam body. The positioning piles are in a cuboid structure; the support frame includes a sliding plate, two first support rods, and two second support rods parallel to the sliding plate. A through hole adapted to the positioning pile is opened in the middle of the sliding plate along the direction perpendicular to the axis of the sliding plate. Square rods that slide along the axis of the sliding plate are provided at both ends of the sliding plate in the axis direction. One end of each of the two first support rods is perpendicularly connected to one square rod.

[0005] The above solution realizes the support of the cofferdam body by arranging multiple support frames inside the cofferdam body. However, the method of large-area support inside is likely to affect the construction efficiency of water conservancy buildings.

[0006] Therefore, a new solution needs to be proposed to solve this problem. Summary of the Invention

[0007] The technical problem to be solved by the present invention is: to provide a water conservancy construction cofferdam device, which solves the problem that the internal support of the existing water conservancy cofferdam occupies a large space and causes inconvenience in construction.

[0008] The technical problem to be solved by the present invention is achieved by adopting the following technical solutions:

[0009] The water conservancy construction cofferdam device includes an upper bracket, a lower bracket, an enclosing plate arranged between the upper bracket and the lower bracket, and a support frame arranged inside the enclosing plate. The upper bracket, the lower bracket, and the enclosing plate are all annular. An upper insertion slot matching with the enclosing plate is formed on the bottom surface of the upper bracket, and a lower insertion slot matching with the enclosing plate is formed on the top surface of the lower bracket. A water stop ring for inserting into the riverbed is fixedly connected to the bottom surface of the lower bracket.

[0010] The support frame includes a plurality of fixing members arranged on the inner side wall of the upper bracket and support members connected one by one between every two adjacent fixing members. The fixing member includes a U-shaped fixing plate fixedly connected to the inner wall of the upper bracket. The support member includes a support rod with two ends respectively fixedly connected to the inner side of the U-shaped fixing plate, a transverse rib plate fixedly connected to the outer side wall of the support rod and extending towards the center of the enclosing plate, a longitudinal rib plate fixedly connected to the top surface of the transverse rib plate, and an inclined pull rod fixedly connected to the longitudinal rib plate. The bottom end of the inclined pull rod is fixedly connected to the riverbed outside the enclosing plate.

[0011] The present invention is further arranged as follows: connection sleeves are provided at both ends of the support rod, internal threads are provided inside the connection sleeves, and the two ends of the support rod are respectively threadedly connected to the inner sides of the connection sleeves, and the internal threads inside the two connection sleeves have opposite helix directions.

[0012] The present invention is further arranged as follows: a plurality of extension plates are fixedly connected to the outer wall of the lower bracket. The plurality of extension plates correspond to the fixing members one by one in the circumferential direction of the enclosing plate. The extension plates extend along the radial direction of the enclosing plate. A plurality of anchor rods for inserting into the riverbed are provided at the end of the extension plate far away from the enclosing plate. One end of the inclined pull rod is fixedly connected to the extension plate. One inclined pull rod is connected to each side of each longitudinal rib plate. The two inclined pull rods located on the same longitudinal rib plate are arranged in a V shape and are respectively connected to the adjacent extension plates on both sides. The longitudinal rib plates are all abutted against the top surface of the upper bracket.

[0013] The present invention is further configured that: the enclosing plate includes a plurality of first plate-shaped units and a plurality of second plate-shaped units. The first plate-shaped unit includes an outer water stop plate and a first support shell arranged on the inner side wall of the outer water stop plate. The second plate-shaped unit includes an inner water stop plate and a second support shell arranged on the outer side wall of the inner water stop plate. Both the first support shell and the second support shell are in the shape of a shell with a uniform thickness. The cooperation between the first support shell and the outer water stop plate and the cooperation between the second support shell and the inner water stop plate both form filling cavities. The first support shell is located in the middle of the outer water stop plate and extends longitudinally at both upper and lower ends along the outer water stop plate. The second support shell is located in the middle of the inner water stop plate and extends longitudinally at both upper and lower ends along the inner water stop plate. A connecting structure is provided between adjacent two outer water stop plates or between adjacent two inner water stop plates. A plurality of the outer water stop plates cooperate to form an outer water stop ring, a plurality of the inner water stop plates cooperate to form an inner water stop ring, and a plurality of the first support shells and a plurality of the second support shells are alternately arranged to form an intermediate support layer.

[0014] The present invention is further configured that: the first support shell is in a trapezoidal structure with a gradually decreasing width from top to bottom, and the second support shell is in a trapezoidal structure with a gradually increasing width from top to bottom.

[0015] The present invention is further configured that: a driving mechanism for applying an upward force to the first plate-shaped unit and a downward force to the second plate-shaped unit is provided inside the upper bracket and the lower bracket.

[0016] The present invention is further configured that: the driving mechanism includes an annular installation groove opened inside the upper bracket and the lower bracket, a pressing ring and a driving ring arranged in the annular installation groove, and a driving member for driving the driving ring to rotate. A plurality of through holes communicating with the upper insertion groove or the lower insertion groove are opened on the inner side wall of the annular installation groove close to the enclosing plate. The through holes located in the lower insertion groove correspond to the first plate-shaped units one by one, and the through holes located in the upper insertion groove correspond to the second plate-shaped units one by one;

[0017] A plurality of pressing columns that are correspondingly and slidably inserted into the through holes are fixedly connected to the end face of the pressing ring close to the enclosing plate. The pressing columns correspondingly abut against the bottom end of the first plate-shaped unit or the top end of the second plate-shaped unit. A plurality of first wedge-shaped blocks evenly distributed in the circumferential direction thereof are fixedly connected to the end face of the pressing ring away from the enclosing plate. The driving ring is rotatably connected in the annular installation groove. A plurality of second wedge-shaped blocks evenly distributed in the circumferential direction thereof are fixedly connected to the end face of the driving ring close to the pressing ring. The wedge surfaces of the first wedge-shaped blocks correspondingly abut against the wedge surfaces of the second wedge-shaped blocks. When the driving ring rotates, it drives the pressing ring to approach the enclosing plate.

[0018] The present invention is further configured such that: a set of driving members are respectively provided on both sides of the upper bracket or the lower bracket. The driving member includes a mounting shell communicated with the annular mounting groove, a worm rotatably connected to the mounting shell, a worm gear coaxially and fixedly connected to the outer wall of the driving ring and meshing with the worm, and an impeller fixedly connected to one end of the worm and located outside the mounting shell.

[0019] The present invention is further configured such that: the connecting structure includes a first folded edge provided on one side of the outer water stop plate or the inner water stop plate, and a second folded edge provided on the other side of the outer water stop plate or the inner water stop plate. The first folded edge is folded inward toward the direction close to the first support shell or the second support shell, and the second folded edge is folded inward and then outward in a hook shape toward the direction close to the first support shell or the second support shell. The first folded edge is buckled inside the hook-shaped second folded edge. An avoidance groove matching the connecting structure is formed on the surface of the first support shell away from the outer water stop plate, and an avoidance groove matching the connecting structure is formed on the surface of the second support shell away from the inner water stop plate.

[0020] The present invention is further configured such that: a water stop strip is provided between the first folded edge and the second folded edge.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. With the cooperation among the upper bracket, the lower bracket and the enclosing plate, a weir body structure is formed, making the whole weir body more stable. During construction, the water stop ring can be first inserted into the riverbed to stabilize the foundation of the lower bracket and the water stop ring, then the enclosing plate is installed, and finally the upper bracket is installed, thus simplifying the overall construction process, improving the construction efficiency. Moreover, a support frame is arranged inside the upper bracket. With the cooperation of the fixing member and the supporting member, a regular polygon structure is formed from the inner member, and the weir body is tightened and supported from the outside through the diagonal tie rod, making the weir body structure more stable and reducing the occupation of the internal space of the weir body, which is convenient for the construction of the water conservancy buildings inside the weir body;

[0023] 2. By respectively arranging connecting sleeves with opposite thread rotation directions at both ends of the support rod, a telescopic rod structure is formed between the support rod and the two connecting sleeves. With the cooperation of the longitudinal rib plate and the diagonal tie rod, the diagonal tie rod applies a tendency to rotate relative to the connecting sleeve to the longitudinal rib plate and the support rod, so that the support rod maintains the supporting force on the weir body. And when the weir body is subjected to an external force and has a tendency to collapse inward, since the support rod is located inside the weir body, under the action of the diagonal tie rod, the support rod increases the force to rotate relative to the connecting sleeve, thereby strengthening the internal supporting force of the weir body and further ensuring the stability of the weir body;

[0024] 3. Fix it by respectively arranging two diagonal tie rods on each support rod, and set the two diagonal tie rods as a V-shaped structure, so as to form a triangular structure between two adjacent diagonal tie rods and the riverbed surface, further enhancing the stability of the support frame;

[0025] 4. The enclosing plate is set to be composed of a first plate unit and a second plate unit spliced with each other. With the cooperation of several outer water stop plates, an outer water stop ring is formed. With the cooperation of several inner water stop plates, an inner water stop ring is formed. With the cooperation of several first support shells and several second support shells, an intermediate support layer is formed. There are three layers of structures in total, and each layer of structure can stop water. After the water path passes through the gaps between the outer water stop plates, the gaps between the first support shell and the second support shell, and the gaps between the inner water stop plates, the length of the water path leaking into the weir body is greatly lengthened, thereby improving the overall waterproof performance. Moreover, the first plate unit and the second plate unit can support each other when spliced with each other, and the weir body can be formed at one time, shortening the construction period. After the enclosing plate is built, filling materials such as sand and gravel can be filled in the filling cavity, thereby increasing the overall mass of the weir body and ensuring stability;

[0026] 5. By setting a driving mechanism, when the flood season comes, the water flow velocity increases, making the torque of the water flow on the impeller increase. When the impeller can drive the worm to rotate, the worm drives the driving ring to rotate through the worm gear, and through the cooperation of the first wedge block and the second wedge block, the thrust of the pressing ring on the first plate unit or the second plate unit is increased, so as to generate a driving force for the first plate unit and the second plate unit to move and approach each other longitudinally. Under the action of the trapezoidal inclined surfaces of the first support shell and the second support shell, the cooperation between adjacent first plate units and second plate units is closer, and the connection of the connection structure is also closer, reducing the possibility of water leakage in the weir body. Brief Description of the Drawings

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0028] Figure 2 It is Figure 1 A partial enlarged view of part A in

[0029] Figure 3 It is a schematic diagram of the structure of the first plate unit part of the present invention.

[0030] Figure 4 It is a schematic diagram of the structure of the second plate unit part of the present invention.

[0031] Figure 5 It is a partial structure schematic diagram of the water stop structure part of the present invention.

[0032] Figure 6 It is a partial cross-sectional view of the upper support part of the present invention.

[0033] Figure 7 It is a schematic structural view of the pressing ring part in the present invention.

[0034] Figure 8 It is a schematic structural view of the driving ring part in the present invention.

[0035] In the figure: 1. upper bracket; 2. lower bracket; 3. enclosing plate; 4. support frame; 5. upper insertion slot; 6. lower insertion slot; 7. water stop ring; 8. fixing member; 9. support member; 10. U-shaped fixing plate; 11. support rod; 12. transverse rib plate; 13. longitudinal rib plate; 14. inclined tie rod; 15. connecting sleeve; 16. extension plate; 17. anchor rod; 18. first plate-like unit; 19. second plate-like unit; 20. outer water stop plate; 21. first support shell; 22. inner water stop plate; 23. second support shell; 24. connecting structure; 25. avoidance groove; 26. first folded edge; 27. second folded edge; 28. water stop strip; 29. driving mechanism; 30. annular installation groove; 31. pressing ring; 32. driving ring; 33. driving member; 34. through hole; 35. pressing column; 36. first wedge block; 37. second wedge block; 38. installation shell; 39. worm; 40. worm gear; 41. impeller. Specific embodiments

[0036] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below with reference to specific drawings.

[0037] As Figures 1-8 shown, the water conservancy construction cofferdam device includes an annular upper bracket 1, a lower bracket 2, an enclosing plate 3 arranged between the upper bracket 1 and the lower bracket 2, and a support frame 4 arranged inside the enclosing plate 3. Among them, the upper bracket 1, the lower bracket 2 and the enclosing plate 3 are all circular rings. The bottom surface of the upper bracket 1 is provided with an upper insertion slot 5 that matches the enclosing plate 3, and the top surface of the lower bracket 2 is provided with a lower insertion slot 6 that matches the enclosing plate 3. The upper and lower ends of the enclosing plate 3 are respectively inserted into the upper insertion slot 5 and the lower insertion slot 6, and waterproof materials are arranged in the upper insertion slot 5 or the lower insertion slot 6 for water stop.

[0038] For the convenience of construction, a water stop ring 7 for inserting into the riverbed is fixedly connected to the bottom surface of the lower bracket 2. During construction, the water stop ring 7 can be inserted into the riverbed first to make the lower bracket 2 and the water stop ring 7 stable at the bottom, then the enclosing plate 3 is installed, and finally the upper bracket 1 is installed, thus simplifying the overall construction process and improving the construction efficiency.

[0039] The support frame 4 includes several fixing members 8 disposed on the inner sidewall of the upper support 1, and support members 9 respectively connected between every two adjacent fixing members 8. The fixing member 8 includes a U-shaped fixing plate 10 fixedly connected to the inner wall of the upper support 1. The support member 9 includes a support rod 11 with both ends respectively fixedly connected to the inner side of the U-shaped fixing plate 10, a transverse rib plate 12 fixedly connected to the outer sidewall of the support rod 11 and extending towards the center of the enclosure plate 3, a longitudinal rib plate 13 fixedly connected to the top surface of the transverse rib plate 12, and an inclined pull rod 14 fixedly connected to the longitudinal rib plate 13. The bottom end of the inclined pull rod 14 is fixedly connected to the riverbed outside the enclosure plate 3.

[0040] To increase the support stability of the support rod 11 for the weir body, connection sleeves 15 are provided at both ends of the support rod 11. The connection sleeve 15 is provided with internal threads. The two ends of the support rod 11 are respectively threadedly connected to the inner side of the connection sleeve 15, and the internal threads in the two connection sleeves 15 at both ends have opposite thread directions. By respectively providing connection sleeves 15 with opposite thread directions at both ends of the support rod 11, a telescopic rod structure is formed between the support rod 11 and the two connection sleeves 15. With the cooperation of the longitudinal rib plate 13 and the inclined pull rod 14, the inclined pull rod 14 applies a tendency to rotate relative to the connection sleeve 15 to the longitudinal rib plate 13 and the support rod 11, so that the support rod 11 maintains the supporting force for the weir body. And when the weir body is subjected to an external force and has a tendency to collapse towards the inner side, since the support rod 11 is located inside the weir body, the support rod 11, under the action of the inclined pull rod 14, increases the force to rotate relative to the connection sleeve 15, thereby strengthening the internal supporting force for the weir body and further ensuring the stability of the weir body.

[0041] A plurality of extension plates 16 are fixedly connected to the outer wall of the lower support 2. The plurality of extension plates 16 correspond to the fixing members 8 one by one in the circumferential direction of the enclosure plate 3. The extension plates 16 extend radially along the enclosure plate 3. One end of the extension plate 16 away from the enclosure plate 3 is provided with a plurality of anchor rods 17 inserted into the riverbed. One end of the inclined pull rod 14 is fixedly connected to the extension plate 16. Two inclined pull rods 14 are respectively connected to both sides of each longitudinal rib plate 13. The two inclined pull rods 14 located on the same longitudinal rib plate 13 are arranged in a V shape and are respectively connected to the adjacent extension plates 16 on both sides. The longitudinal rib plates 13 are all abutted against the top surface of the upper support 1. By respectively providing two inclined pull rods 14 on each support rod 11 for fixation and setting the two inclined pull rods 14 in a V-shaped structure, a triangular structure is formed between the adjacent two inclined pull rods 14 and the riverbed surface, further enhancing the stability of the support frame.

[0042] The enclosing plate 3 includes a plurality of first plate-shaped units 18 and a plurality of second plate-shaped units 19. The first plate-shaped unit 18 includes an outer water stop plate 20 and a first support shell 21 arranged on the inner side wall of the outer water stop plate 20. The second plate-shaped unit 19 includes an inner water stop plate 22 and a second support shell 23 arranged on the outer side wall of the inner water stop plate 22. Both the first support shell 21 and the second support shell 23 are in the shape of a shell with a uniform thickness. The first support shell 21 is located in the middle of the outer water stop plate 20 and extends longitudinally at both the upper and lower ends along the outer water stop plate 20. The second support shell 23 is located in the middle of the inner water stop plate 22 and extends longitudinally at both the upper and lower ends along the inner water stop plate 22. And the first support shell 21 is in a trapezoidal structure with a gradually decreasing width from top to bottom, and the second support shell 23 is in a trapezoidal structure with a gradually increasing width from top to bottom.

[0043] A connecting structure 24 is provided between two adjacent outer water stop plates 20 or between two adjacent inner water stop plates 22. An avoidance groove 25 matching the connecting structure 24 is formed on the surface of the first support shell 21 away from the outer water stop plate 20, and an avoidance groove 25 matching the connecting structure 24 is formed on the surface of the second support shell 23 away from the inner water stop plate 22.

[0044] The connecting structure 24 includes a first folded edge 26 arranged on one side of the outer water stop plate 20 or the inner water stop plate 22, and a second folded edge 27 on the other side of the outer water stop plate 20 or the inner water stop plate 22. The first folded edge 26 is folded inward towards the direction close to the first support shell 21 or the second support shell 23, and the second folded edge 27 is folded inward towards the direction close to the first support shell 21 or the second support shell 23 and then folded outward to form a hook shape. The first folded edge 26 is buckled inside the hook shape of the second folded edge 27, and a water stop strip 28 is arranged between the first folded edge 26 and the second folded edge 27.

[0045] The cooperation between the first support shell 21 and the outer water stop plate 20 and the cooperation between the second support shell 23 and the inner water stop plate 22 both form a filling cavity. A plurality of outer water stop plates 20 cooperate to form an outer water stop ring, a plurality of inner water stop plates 22 cooperate to form an inner water stop ring, and a plurality of first support shells 21 and a plurality of second support shells 23 are alternately arranged to form an intermediate support layer.

[0046] By setting the enclosing plate 3 to be composed of the first plate-shaped unit 18 and the second plate-shaped unit 19 spliced with each other, with the cooperation of a number of outer water-stop plates 20, an outer water-stop ring is formed, and with the cooperation of a number of inner water-stop plates 22, an inner water-stop ring is formed. With the cooperation of a number of first support shells 21 and a number of second support shells 23, an intermediate support layer is formed. There are a total of three layers of structures, and each layer of structure can stop water. After the water flow passes through the gaps between the outer water-stop plates 20, the gaps between the first support shell 21 and the second support shell 23, and the gaps between the inner water-stop plates 22, the length of the water flow leaking into the weir body is greatly lengthened, thereby improving the overall waterproof performance. Moreover, the first plate-shaped unit 18 and the second plate-shaped unit 19 can support each other after being spliced with each other, and the weir body can be formed in one step, shortening the construction period. After the enclosing plate 3 is built, filling materials such as sand and gravel can be filled in the filling cavity, thereby increasing the overall mass of the weir body and ensuring stability.

[0047] A driving mechanism 29 for applying an upward force to the first plate-shaped unit 18 and a downward force to the second plate-shaped unit 19 is provided inside the upper support 1 and the lower support 2. The driving mechanism 29 includes an annular installation groove 30 opened inside the upper support 1 and the lower support 2, a pressing ring 31 and a driving ring 32 arranged in the annular installation groove 30, and a driving member 33 for driving the driving ring 32 to rotate. A number of through holes 34 communicating with the upper insertion groove 5 or the lower insertion groove 6 are opened on the inner side wall of the annular installation groove 30 close to the enclosing plate 3. The through holes 34 located in the lower insertion groove 6 correspond to the first plate-shaped unit 18 one by one, and the through holes 34 located in the upper insertion groove 5 correspond to the second plate-shaped unit 19 one by one.

[0048] A number of pressing columns 35 slidably inserted into the through holes 34 one by one are fixedly connected to the end face of the pressing ring 31 close to the enclosing plate 3. The pressing columns 35 are respectively abutted against the bottom end of the first plate-shaped unit 18 or the top end of the second plate-shaped unit 19. A number of first wedge-shaped blocks 36 evenly distributed around its circumferential direction are fixedly connected to the end face of the pressing ring 31 away from the enclosing plate 3. The driving ring 32 is rotatably connected in the annular installation groove 30. A number of second wedge-shaped blocks 37 evenly distributed around its circumferential direction are fixedly connected to the end face of the driving ring 32 close to the pressing ring 31. The wedge surfaces of the first wedge-shaped blocks 36 are respectively abutted against the wedge surfaces of the second wedge-shaped blocks 37. When the driving ring 32 rotates, it drives the pressing ring 31 to approach the enclosing plate 3.

[0049] A set of driving members 33 are respectively provided on both sides of the upper support 1 or the lower support 2. The driving member 33 includes a mounting shell 38 communicated with the annular mounting groove 30, a worm 39 rotatably connected in the mounting shell 38, a worm gear 40 coaxially and fixedly connected to the outer wall of the driving ring 32 and meshed with the worm 39, and an impeller 41 fixedly connected to one end of the worm 39 and located outside the mounting shell 38. When the flood season comes, the water flow speed increases, so that the torque of the water flow on the impeller 41 increases. When the impeller 41 can drive the worm 39 to rotate, the worm 39 drives the driving ring 32 to rotate through the worm gear 40, and through the cooperation of the first wedge block 36 and the second wedge block 37, the thrust of the pressing ring 31 on the first plate-like unit 18 or the second plate-like unit 19 is increased, so that the first plate-like unit 18 and the second plate-like unit 19 generate a driving force to move and approach each other longitudinally. Under the action of the trapezoidal inclined surfaces of the first support shell 21 and the second support shell 23, the cooperation between the adjacent first plate-like unit 18 and the second plate-like unit 19 is made closer.

[0050] The implementation principle of the present invention is as follows:

[0051] With the cooperation of the upper support 1, the lower support 2 and the enclosing plate 3, a weir body structure is formed, making the whole weir body more stable. During construction, first insert the water stop ring 7 into the river bed to stabilize the foundation of the lower support 2 and the water stop ring 7, then install the enclosing plate 3, and finally install the upper support 1, which simplifies the overall construction process and improves the construction efficiency. Moreover, a support frame 4 is arranged inside the upper support 1. With the cooperation of the fixing member 8 and the supporting member 9, a regular polygon structure is formed from the inner side members, and the weir body is tightened and supported from the outside through the inclined tie rod 14, making the weir body structure more stable and reducing the occupation of the internal space of the weir body, which is convenient for the construction of the hydraulic buildings inside the weir body;

[0052] When the flood season comes, the water flow speed increases, so that the torque of the water flow on the impeller 41 increases. When the impeller 41 can drive the worm 39 to rotate, the worm 39 drives the driving ring 32 to rotate through the worm gear 40, and through the cooperation of the first wedge block 36 and the second wedge block 37, the thrust of the pressing ring 31 on the first plate-like unit 18 or the second plate-like unit 19 is increased, so that the first plate-like unit 18 and the second plate-like unit 19 generate a driving force to move and approach each other longitudinally. Under the action of the trapezoidal inclined surfaces of the first support shell 21 and the second support shell 23, the cooperation between the adjacent first plate-like unit 18 and the second plate-like unit 19 is made closer, and the connection of the connection structure 24 is also made closer, reducing the possibility of water leakage of the weir body.

[0053] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, various changes and improvements will occur to the present invention, and all such changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A water conservancy construction cofferdam device, characterized in that: The invention comprises an upper bracket (1), a lower bracket (2), an enclosure plate (3) arranged between the upper bracket (1) and the lower bracket (2), and a support frame (4) arranged on the inner side of the enclosure plate (3); the upper bracket (1), the lower bracket (2) and the enclosure plate (3) are all annular; an upper plug-in groove (5) matching with the enclosure plate (3) is provided on the bottom surface of the upper bracket (1); a lower plug-in groove (6) matching with the enclosure plate (3) is provided on the top surface of the lower bracket (2); and a water stop ring (7) for inserting into the interior of a riverbed is fixedly connected to the bottom surface of the lower bracket (2); The support frame (4) comprises a plurality of fixing members (8) arranged on the inner wall of the upper support (1), and a supporting member (9) connected one by one between each two adjacent fixing members (8), wherein the fixing member (8) comprises a U-shaped fixing plate (10) fixedly connected to the inner wall of the upper support (1), and the supporting member (9) comprises a supporting rod (11) whose two ends are respectively fixedly connected to the inner side of the U-shaped fixing plate (10), a transverse rib plate (12) fixedly connected to the outer wall of the supporting rod (11) and extending toward the center of the enclosure plate (3), a longitudinal rib plate (13) fixedly connected to the top surface of the transverse rib plate (12), and a diagonal rod (14) fixedly connected to the longitudinal rib plate (13), and the bottom end of the diagonal rod (14) is fixedly connected to the riverbed outside the enclosure plate (3); The enclosed plate (3) comprises a plurality of first plate-like units (18) and a plurality of second plate-like units (19); the first plate-like unit (18) comprises an outer water stop plate (20) and a first support shell (21) arranged on the inner side wall of the outer water stop plate (20); the second plate-like unit (19) comprises an inner water stop plate (22) and a second support shell (23) arranged on the outer side wall of the inner water stop plate (22); the first support shell (21) and the second support shell (23) are both in the shape of shells with the same thickness; the first support shell (21) cooperates with the outer water stop plate (20) and the second support shell (23) cooperates with the inner water stop plate (22). Both form a filling cavity, the first support shell (21) is located in the middle of the outer water stop plate (20) and extends along the longitudinal direction of the outer water stop plate (20) at both ends, the second support shell (23) is located in the middle of the inner water stop plate (22) and extends along the longitudinal direction of the inner water stop plate (22) at both ends, a connecting structure (24) is provided between two adjacent outer water stop plates (20) or between two adjacent inner water stop plates (22), a plurality of the outer water stop plates (20) cooperate to form an outer water stop ring, a plurality of the inner water stop plates (22) cooperate to form an inner water stop ring, a plurality of the first support shells (21) and a plurality of the second support shells (23) are alternately arranged and form an intermediate support layer; The first supporting shell (21) is in a trapezoidal structure with a width gradually decreasing from top to bottom, and the second supporting shell (23) is in a trapezoidal structure with a width gradually increasing from top to bottom.

2. The water conservancy construction cofferdam device according to claim 1, characterized in that: Both ends of the support rod (11) are provided with connecting sleeves (15), and the connecting sleeves (15) are provided with internal threads. The two ends of the support rod (11) are respectively threadedly connected to the inner side of the connecting sleeves (15), and the internal threads in the connecting sleeves (15) at the two ends have opposite rotation directions.

3. The water conservancy construction cofferdam device according to claim 1, characterized in that: The outer wall of the lower bracket (2) is fixedly connected with a plurality of extension plates (16), and the plurality of extension plates (16) correspond to the fixing members (8) one by one in the annular direction of the enclosure plate (3). The extension plates (16) extend radially along the enclosure plate (3), and one end of the extension plate (16) away from the enclosure plate (3) is provided with a plurality of anchor rods (17) inserted into the riverbed. One end of the inclined rod (14) is fixedly connected to the extension plate (16), and each of the two sides of each longitudinal rib plate (13) is connected with one inclined rod (14). The two inclined rods (14) located on the same longitudinal rib plate (13) are arranged in a V shape and are respectively connected to the extension plates (16) on the adjacent two sides, and the longitudinal rib plates (13) are both in contact with the top surface of the upper bracket (1).

4. The water conservancy construction cofferdam device according to claim 1, characterized in that: The upper bracket (1) and the lower bracket (2) are provided with a driving mechanism (29) for applying an upward force to the first plate-shaped unit (18) and a downward force to the second plate-shaped unit (19).

5. The water conservancy construction cofferdam device according to claim 4 is characterized in that: The driving mechanism (29) comprises an annular mounting groove (30) provided inside the upper bracket (1) and the lower bracket (2), a pressing ring (31) and a driving ring (32) provided inside the annular mounting groove (30), and a driving member (33) for driving the driving ring (32) to rotate; the inner side wall of the annular mounting groove (30) close to the enclosing plate (3) is provided with a plurality of through holes (34) connected to the upper plug-in groove (5) or the lower plug-in groove (6); the through holes (34) located in the lower plug-in groove (6) correspond one-to-one to the first plate-like units (18), and the through holes (34) located in the upper plug-in groove (5) correspond one-to-one to the second plate-like units (19); The end surface of the pressure ring (31) close to the enclosure plate (3) is fixedly connected with a plurality of pressure columns (35) which are slidably inserted in the through hole (34) in a one-to-one manner. The pressure columns (35) are in one-to-one contact with the bottom end of the first plate-like unit (18) or the top end of the second plate-like unit (19). The end surface of the pressure ring (31) away from the enclosure plate (3) is fixedly connected with a plurality of first wedge blocks (36) which are evenly distributed around the ring. The drive ring (32) is rotatably connected in the annular mounting groove (30). The drive ring (32) is fixedly connected with a plurality of second wedge blocks (37) which are evenly distributed around the ring near the end surface of the pressure ring (31). The wedge surfaces of the first wedge blocks (36) are in one-to-one contact with the wedge surfaces of the second wedge blocks (37). When the drive ring (32) rotates, the pressure ring (31) is driven to approach the enclosure plate (3).

6. The water conservancy construction cofferdam device according to claim 5, characterized in that: The driving member (33) is provided with a group on both sides of the upper bracket (1) or the lower bracket (2), respectively, and the driving member (33) comprises a mounting shell (38) connected to the annular mounting groove (30), a worm (39) rotatably connected to the mounting shell (38), a worm wheel (40) coaxially fixedly connected to the outer wall of the driving ring (32) and meshing with the worm (39), and an impeller (41) fixedly connected to one end of the worm (39) and located outside the mounting shell (38).

7. The water conservancy construction cofferdam device according to claim 1, characterized in that: The connection structure (24) comprises a first folded edge (26) arranged on one side of the outer water stop plate (20) or the inner water stop plate (22), and a second folded edge (27) on the other side of the outer water stop plate (20) or the inner water stop plate (22); the first folded edge (26) is folded inwardly in a direction close to the first support shell (21) or the second support shell (23); the second folded edge (27) is folded inwardly in a direction close to the first support shell (21) or the second support shell (23) and then folded outwardly in a hook shape; the first folded edge (26) is buckled on the inner side of the hook of the second folded edge (27); a surface of the first support shell (21) away from the outer water stop plate (20) is provided with an avoidance groove (25) matching with the connection structure (24); a surface of the second support shell (23) away from the inner water stop plate (22) is provided with an avoidance groove (25) matching with the connection structure (24).

8. The water conservancy construction cofferdam device according to claim 7, characterized in that: A water stop strip (28) is provided between the first folded edge (26) and the second folded edge (27).

Images