Water conservancy construction cofferdam device

Abstract

The invention relates to a water conservancy construction cofferdam device, and belongs to the technical field of cofferdam facilities. Comprising an upper support, a lower support, an enclosing plate arranged between the upper support and the lower support and a supporting frame arranged on the inner side of the enclosing plate, the upper support, the lower support and the enclosing plate are all annular, an upper inserting groove matched with the enclosing plate is formed in the bottom face of the upper support, and a lower inserting groove matched with the enclosing plate is formed in the bottom face of the lower support. A lower inserting groove matched with the enclosing plate is formed in the top face of the lower support, and a water stop ring used for being inserted into a riverbed is fixedly connected to the bottom face of the lower support; the supporting frame comprises a plurality of fixing pieces arranged on the inner side wall of the upper support and supporting pieces connected between every two adjacent fixing pieces in a one-to-one correspondence mode. According to the water conservancy cofferdam, the problem that in the prior art, an internal support of the water conservancy cofferdam occupies a large space, and consequently construction is inconvenient is solved.

Description

Technical Field

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

[0002] A cofferdam is a temporary retaining structure built for permanent water conservancy facilities in water conservancy project construction. Its function is to prevent water and soil from entering the construction site of the building so that drainage can be done in the cofferdam, foundation pits can be excavated, and buildings can be built. It is generally used in hydraulic structures. Except as part of a formal building, the cofferdam is generally dismantled after use.

[0003] Steel sheet pile cofferdam is the most commonly used sheet pile cofferdam. Steel sheet pile is a kind of steel with a lock. Its cross section has straight plate, groove and Z shape, etc., with various sizes and interlocking forms. Common ones are Larsen type and Lackawanna type. Its advantages are: high strength, easy to drive into hard soil layer; can be constructed in deep water, good waterproof performance; can form cofferdams of various shapes as needed, and can be reused many times, so it has a wide range of uses. In bridge construction, it is often used for cofferdams on the top of caissons, pipe column foundations, pile foundations and open excavation foundations. These cofferdams are mostly single-wall closed cofferdams with longitudinal and transverse supports, and inclined supports are added to form a cage when necessary.

[0004] After searching, a Chinese patent with announcement number CN113293782B discloses a water-stop structure for a water conservancy project cofferdam and a construction method thereof, the technical key points of which are: it includes a dam body with a rectangular structure, and also includes positioning piles for vertically fixing in the middle of the dam body and a plurality of support frames for supporting the dam body, the positioning piles are in a rectangular structure; the support frames include a sliding plate, two first support rods and two second support rods parallel to the sliding plate, the middle part of the sliding plate is provided with a through hole adapted to the positioning pile in a direction perpendicular to the axis of the sliding plate, both ends of the sliding plate in the axis direction are provided with square rods sliding along the axis direction of the sliding plate, and one end of each of the two first support rods is vertically connected to a square rod.

[0005] The above scheme realizes the support of the weir body by arranging a plurality of support frames in the weir body. However, the method of carrying out large-area support inside can easily affect the construction efficiency of the water conservancy construction.

[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 in the prior art that the internal support of the water conservancy cofferdam occupies a large space and causes construction inconvenience.

[0008] The technical problem to be solved by the present invention is achieved by adopting the following technical solutions: A water conservancy construction cofferdam device comprises an upper bracket, a lower bracket, an enclosure plate arranged between the upper bracket and the lower bracket, and a support frame arranged inside the enclosure plate, wherein the upper bracket, the lower bracket and the enclosure plate are all annular, an upper plug-in groove matching the enclosure plate is provided on the bottom surface of the upper bracket, a lower plug-in groove matching the enclosure plate is provided on the top surface of the lower bracket, and 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 wall of the upper bracket, and supporting members connected one by one between each two adjacent fixing members, the fixing members include a U-shaped fixing plate fixedly connected to the inner wall of the upper bracket, and the supporting member includes a supporting rod whose two ends are 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 supporting rod and extending toward the center of the enclosure plate, a longitudinal rib plate fixedly connected to the top surface of the transverse rib plate, and a diagonal rod fixedly connected to the longitudinal rib plate, and the bottom end of the diagonal rod is fixedly connected to the riverbed outside the enclosure plate.

[0009] The present invention is further configured as follows: connecting sleeves are provided at both ends of the support rod, internal threads are provided in the connecting sleeves, and the two ends of the support rod are respectively threadedly connected to the inner side of the connecting sleeves, and the internal threads in the connecting sleeves at both ends have opposite rotation directions.

[0010] The present invention is further configured as follows: a plurality of extension plates are fixedly connected to the outer wall of the lower bracket, and the plurality of extension plates correspond one by one to the fixing parts in the annular direction of the enclosing plate, and the extension plates extend radially along the enclosing plate, and a plurality of anchor rods inserted into the riverbed are provided at one end of the extension plate away from the enclosing plate, and one end of the diagonal tie rod is fixedly connected to the extension plate, and each of the two sides of each longitudinal rib plate is connected to a diagonal tie rod, and the two diagonal tie rods located on the same longitudinal rib plate are arranged in a V shape and are respectively connected to the extension plates on the adjacent two sides, and the longitudinal rib plates are both in contact with the top surface of the upper bracket.

[0011] The present invention is further configured as follows: the enclosing plate includes a plurality of first plate-like units and a plurality of second plate-like units, the first plate-like unit includes an outer waterstop plate and a first supporting shell arranged on the inner side wall of the outer waterstop plate, the second plate-like unit includes an inner waterstop plate and a second supporting shell arranged on the outer side wall of the inner waterstop plate, the first supporting shell and the second supporting shell are both shell-shaped with uniform thickness, the first supporting shell cooperates with the outer waterstop plate and the second supporting shell cooperates with the inner waterstop plate to form a filling cavity, the first supporting shell is located in the middle of the outer waterstop plate and has upper and lower ends extending longitudinally along the outer waterstop plate, the second supporting shell is located in the middle of the inner waterstop plate and has upper and lower ends extending longitudinally along the inner waterstop plate, a connecting structure is provided between two adjacent outer waterstop plates or between two adjacent inner waterstop plates, a plurality of the outer waterstop plates cooperate to form an outer waterstop ring, a plurality of the inner waterstop plates cooperate to form an inner waterstop ring, a plurality of the first supporting shells and a plurality of the second supporting shells are alternately arranged to form an intermediate supporting layer.

[0012] The present invention is further configured as follows: the first supporting shell is in a trapezoidal structure with a width gradually decreasing from top to bottom, and the second supporting shell is in a trapezoidal structure with a width gradually increasing from top to bottom.

[0013] The present invention is further configured as follows: 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 in the upper bracket and the lower bracket.

[0014] The present invention is further configured as follows: the driving mechanism comprises an annular mounting groove provided inside the upper bracket and the lower bracket, a pressing ring and a driving ring provided in the annular mounting groove, and a driving member for driving the driving ring to rotate; the inner side wall of the annular mounting groove close to the enclosing plate is provided with a plurality of through holes connected to the upper plug-in groove or the lower plug-in groove, the through holes in the lower plug-in groove correspond one-to-one to the first plate-like units, and the through holes in the upper plug-in groove correspond one-to-one to the second plate-like units; The end face of the pressure ring close to the enclosing plate is fixedly connected with a plurality of pressure columns which are slidably inserted in the through hole in a one-to-one manner, and the pressure columns are respectively abutted against the bottom end of the first plate-like unit or the top end of the second plate-like unit; the end face of the pressure ring away from the enclosing plate is fixedly connected with a plurality of first wedge blocks which are evenly distributed around the ring; the driving ring is rotatably connected in the annular mounting groove; the driving ring is fixedly connected with a plurality of second wedge blocks which are evenly distributed around the ring near the end face of the pressure ring; the wedge surfaces of the first wedge blocks are respectively abutted against the wedge surfaces of the second wedge blocks, and the driving ring is driven to approach the enclosing plate when it rotates.

[0015] The present invention is further configured as follows: a group of driving members are respectively provided on both sides of the upper bracket or the lower bracket, and the driving member includes a mounting shell connected to the annular mounting groove, a worm rotatably connected to the mounting shell, a worm wheel coaxially 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.

[0016] The present invention is further configured as follows: the connecting structure includes a first folded edge arranged on one side of the outer waterstop plate or the inner waterstop plate, and a second folded edge on the other side of the outer waterstop plate or the inner waterstop plate, the first folded edge is folded inwardly toward the direction close to the first support shell or the second support shell, the second folded edge is folded inwardly toward the direction close to the first support shell or the second support shell and then folded outwardly into a hook shape, the first folded edge is buckled on the inner side of the hook-shaped second folded edge, the surface of the first support shell away from the outer waterstop plate is provided with an avoidance groove matching the connecting structure, and the surface of the second support shell away from the inner waterstop plate is provided with an avoidance groove matching the connecting structure.

[0017] The present invention is further configured as follows: a water stop strip is provided between the first folded edge and the second folded edge.

[0018] The beneficial effects of the present invention are: 1. With the cooperation between the upper bracket, the lower bracket and the enclosure plate, a weir structure is formed, making the weir more stable as a whole. During construction, the water stop ring can be inserted into the riverbed first, so that the lower bracket and the water stop ring can stabilize the bottom foundation, and then the enclosure plate can be installed, and finally the upper bracket can be installed, thereby simplifying the overall construction process and improving the construction efficiency. A support frame is arranged on the inner side of the upper bracket. With the cooperation of the fixing parts and the supporting parts, a regular polygonal structure is formed from the inner side, and the weir is tightened and supported from the outside through the inclined rod, making the weir structure more stable, reducing the occupation of the internal space of the weir, and facilitating the construction of water conservancy buildings inside the weir; 2. Connecting sleeves with opposite thread directions are respectively arranged at both ends of the support rod, so that a telescopic rod structure is formed between the support rod and the two connecting sleeves. Under the cooperation of the longitudinal rib plate and the inclined rod, the inclined rod exerts a tendency to rotate relative to the connecting sleeve on the longitudinal rib plate and the support rod, so that the support rod maintains the supporting force on the weir body. When the weir body has a tendency to collapse inward due to external force, since the support rod is located inside the weir body, the support rod increases the force of rotating relative to the connecting sleeve under the action of the inclined rod, thereby strengthening the supporting force on the inside of the weir body and further ensuring the stability of the weir body. 3. By setting two inclined tie rods on each support rod for fixing, and setting the two inclined tie rods into a V-shaped structure, a triangular structure is formed between the two adjacent inclined tie rods and the riverbed surface, further enhancing the stability of the support frame; 4. The enclosing plate is configured to be formed by splicing the first plate-like unit and the second plate-like unit, and an outer water stop ring is formed under the cooperation of a plurality of outer water stop plates, an inner water stop ring is formed under the cooperation of a plurality of inner water stop plates, and an intermediate support layer is formed under the cooperation of a plurality of first support shells and a plurality of second support shells. A three-layer structure is provided in total, and each layer of the structure can stop water. After the water path passes through the gaps between the outer water stop plates, the gaps between the first support shells and the second support shells, 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. The first plate-like unit and the second plate-like unit can achieve mutual support when spliced ​​with each other, and the weir body can be formed at one time, shortening the construction period. After the construction of the enclosing plate is completed, sand and gravel and other filling materials can be filled in the filling cavity, thereby increasing the overall quality of the weir body and ensuring stability. 5. By setting up a driving mechanism, when the flood season comes, the water flow speed increases, so that the torque of the water flow on the impeller increases. 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 pressure ring on the first plate-like unit or the second plate-like unit is increased, so that the first plate-like unit and the second plate-like unit are driven to move toward each other in the longitudinal direction. Under the action of the trapezoidal inclined surfaces of the first supporting shell and the second supporting shell, the adjacent first plate-like units and the second plate-like units are more closely matched, and the connection of the connecting structure is also tighter, thereby reducing the possibility of water leakage in the weir body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 yes Figure 1 A partial enlarged view of part A.

[0021] Figure 3 It is a schematic structural diagram of the first plate-like unit part in the present invention.

[0022] Figure 4 It is a schematic structural diagram of the second plate-like unit part in the present invention.

[0023] Figure 5 It is a partial structural schematic diagram of the water stop structure part of the present invention.

[0024] Figure 6 It is a partial cross-sectional view of the upper bracket part in the present invention.

[0025] Figure 7 It is a schematic structural diagram of the pressure ring part in the present invention.

[0026] Figure 8 It is a schematic structural diagram of the driving ring part in the present invention.

[0027] In the figure: 1, upper bracket; 2, lower bracket; 3, enclosure plate; 4, support frame; 5, upper plug-in groove; 6, lower plug-in groove; 7, water stop ring; 8, fixing piece; 9, support piece; 10, U-shaped fixing plate; 11, support rod; 12, transverse rib plate; 13, longitudinal rib plate; 14, inclined 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, connection structure; 25, avoidance groove; 26, first folded edge; 27, second folded edge; 28, water stop strip; 29, driving mechanism; 30, annular mounting groove; 31, pressure ring; 32, driving ring; 33, driving member; 34, through hole; 35, pressure column; 36, first wedge block; 37, second wedge block; 38, mounting shell; 39, worm; 40, worm wheel; 41, impeller. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0029] like Figure 1-Figure 8 As shown, the water conservancy construction cofferdam device includes an annular 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, wherein the upper bracket 1, the lower bracket 2 and the enclosure plate 3 are all in annular shape, an upper plug-in groove 5 matched with the enclosure plate 3 is opened on the bottom surface of the upper bracket 1, and a lower plug-in groove 6 matched with the enclosure plate 3 is opened on the top surface of the lower bracket 2. The upper and lower ends of the enclosure plate 3 are respectively plugged into the upper plug-in groove 5 and the lower plug-in groove 6, and water stopping is performed by arranging waterproof material in the upper plug-in groove 5 or the lower plug-in groove 6.

[0030] To facilitate construction, the bottom surface of the lower bracket 2 is fixedly connected with a water stop ring 7 for insertion into the riverbed. During construction, the water stop ring 7 can be inserted into the riverbed first, so that the lower bracket 2 and the water stop ring 7 stabilize the bottom foundation, and then the enclosure plate 3 is installed, and finally the upper bracket 1 is installed, thereby simplifying the overall construction process and improving construction efficiency.

[0031] The support frame 4 includes a plurality of fixing members 8 arranged on the inner wall of the upper bracket 1, and support members 9 connected one by one between each adjacent two fixing members 8. The fixing members 8 include a U-shaped fixing plate 10 fixedly connected to the inner wall of the upper bracket 1, and the support member 9 includes a support 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 support 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.

[0032] In order to increase the support stability of the support rod 11 on the weir body, connecting sleeves 15 are provided at both ends of the support rod 11, and internal threads are provided in the connecting sleeves 15. 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 both ends have opposite rotation directions. By respectively providing connecting sleeves 15 with opposite thread rotation directions at both ends of the support rod 11, a telescopic rod structure is formed between the support rod 11 and the two connecting sleeves 15. Under the cooperation of the longitudinal rib plate 13 and the inclined rod 14, the inclined rod 14 exerts a tendency to rotate relative to the connecting sleeve 15 on the longitudinal rib plate 13 and the support rod 11, so that the support rod 11 maintains the supporting force on the weir body, and when the weir body has a tendency to collapse toward the inside due to external force, since the support rod 11 is located inside the weir body, the support rod 11 increases the force of rotating relative to the connecting sleeve 15 under the action of the inclined rod 14, thereby strengthening the supporting force on the inside of the weir body and further ensuring the stability of the weir body.

[0033] The outer wall of the lower bracket 2 is fixedly connected with a plurality of extension plates 16, which 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. The 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 tie rod 14 is fixedly connected to the extension plate 16. Each of the two sides of each longitudinal rib plate 13 is connected with an inclined tie rod 14. The two inclined tie rods 14 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. The longitudinal rib plates 13 are all in contact with the top surface of the upper bracket 1. By respectively arranging two inclined tie rods 14 on each support rod 11 for fixing, and setting the two inclined tie rods 14 as a V-shaped structure, a triangular structure is formed between the two adjacent inclined tie rods 14 and the riverbed surface, further enhancing the stability of the support frame.

[0034] The enclosing plate 3 includes a plurality of first plate-like units 18 and a plurality of second plate-like units 19. The first plate-like unit 18 includes an outer waterstop plate 20 and a first supporting shell 21 arranged on the inner side wall of the outer waterstop plate 20. The second plate-like unit 19 includes an inner waterstop plate 22 and a second supporting shell 23 arranged on the outer side wall of the inner waterstop plate 22. The first supporting shell 21 and the second supporting shell 23 are both shell-shaped with uniform thickness. The first supporting shell 21 is located in the middle of the outer waterstop plate 20 and extends longitudinally along the outer waterstop plate 20 at both ends. The second supporting shell 23 is located in the middle of the inner waterstop plate 22 and extends longitudinally along the inner waterstop plate 22 at both ends. The first supporting shell 21 is a trapezoidal structure with a width that gradually decreases from top to bottom, and the second supporting shell 23 is a trapezoidal structure with a width that gradually increases from top to bottom.

[0035] A connecting structure 24 is provided between two adjacent outer waterstop plates 20 or between two adjacent inner waterstop plates 22. A avoidance groove 25 matching the connecting structure 24 is provided on the surface of the first support shell 21 away from the outer waterstop plate 20, and a avoidance groove 25 matching the connecting structure 24 is provided on the surface of the second support shell 23 away from the inner waterstop plate 22.

[0036] 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 toward the direction close to the first support shell 21 or the second support shell 23, and the second folded edge 27 is folded inward toward the direction close to the first support shell 21 or the second support shell 23 and then folded outward into a hook shape. The first folded edge 26 is buckled on the inner side of the hook-shaped second folded edge 27, and a water stop strip 28 is provided between the first folded edge 26 and the second folded edge 27.

[0037] The first support shell 21 cooperates with the outer waterstop plate 20, and the second support shell 23 cooperates with the inner waterstop plate 22 to form a filling cavity. Several outer waterstop plates 20 cooperate to form an outer waterstop ring, and several inner waterstop plates 22 cooperate to form an inner waterstop ring. Several first support shells 21 and several second support shells 23 are alternately arranged and form an intermediate support layer.

[0038] By setting the enclosing plate 3 to be formed by splicing the first plate-like unit 18 and the second plate-like unit 19 together, an outer water stop ring is formed with the cooperation of several outer water stop plates 20, an inner water stop ring is formed with the cooperation of several inner water stop plates 22, and an intermediate support layer is formed with the cooperation of several first support shells 21 and several second support shells 23. A total of three-layer structure is set, and each layer of the structure can stop water. After the water path passes through the gap between the outer water stop plates 20, the gap between the first support shell 21 and the second support shell 23, and the gap between the inner water stop plates 22, the length of the water path leaking into the weir body is greatly lengthened, thereby improving the overall waterproof performance. The first plate-like unit 18 and the second plate-like unit 19 can be spliced ​​together to support each other, and the weir body can be formed at one time, shortening the construction period. After the construction of the enclosing plate 3 is completed, sand and gravel and other filling materials can be filled in the filling cavity, thereby increasing the overall quality of the weir body and ensuring stability.

[0039] A driving mechanism 29 is provided inside the upper bracket 1 and the lower bracket 2 for applying an upward force to the first plate-like unit 18 and a downward force to the second plate-like unit 19. The driving mechanism 29 includes 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. A plurality of through holes 34 connected to the upper plug-in groove 5 or the lower plug-in groove 6 are provided on the inner side wall of the annular mounting groove 30 near the enclosing plate 3. The through holes 34 located in the lower plug-in groove 6 correspond one-to-one to the first plate-like unit 18, and the through holes 34 located in the upper plug-in groove 5 correspond one-to-one to the second plate-like unit 19.

[0040] The end surface of the pressure ring 31 close to the enclosing plate 3 is fixedly connected with a plurality of pressure columns 35 which are slidably inserted in the through holes 34 in a one-to-one manner. The pressure columns 35 are in one-to-one contact with the bottom ends of the first plate-like units 18 or the top ends of the second plate-like units 19. The end surface of the pressure ring 31 away from the enclosing plate 3 is fixedly connected with a plurality of first wedge blocks 36 which are evenly distributed around the ring. The driving ring 32 is rotatably connected in the annular mounting groove 30. The driving 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 driving ring 32 rotates, the pressure ring 31 is driven to approach the enclosing plate 3.

[0041] A group of driving members 33 are respectively provided on both sides of the upper bracket 1 or the lower bracket 2, and the driving member 33 includes 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. When the flood season arrives, the water flow speed increases, which increases the torque of the water flow on the impeller 41. When the impeller 41 is able to drive the worm 39 to rotate, the worm 39 drives the drive ring 32 to rotate through the worm wheel 40, and through the cooperation of the first wedge block 36 and the second wedge block 37, the thrust of the pressure ring 31 on the first plate unit 18 or the second plate unit 19 is increased, so that the first plate unit 18 and the second plate unit 19 are driven to move toward each other in the longitudinal direction. Under the action of the trapezoidal inclined surfaces of the first support shell 21 and the second support shell 23, the adjacent first plate units 18 and the second plate units 19 are more closely matched.

[0042] The implementation principle of the present invention is: With the cooperation between the upper support 1, the lower support 2 and the enclosure plate 3, a weir structure is formed, making the weir as a whole more stable. During construction, the water stop ring 7 is first inserted into the riverbed to stabilize the bottom foundation of the lower support 2 and the water stop ring 7, and then the enclosure plate 3 is installed, and finally the upper support 1 is installed, which simplifies the overall construction process and improves the construction efficiency. A support frame 4 is arranged on the inner side of the upper support 1. With the cooperation of the fixing member 8 and the supporting member 9, a regular polygonal structure is formed from the inner side, and the weir is tightened and supported from the outside through the inclined tie rod 14, making the weir structure more stable, reducing the occupation of the internal space of the weir, and facilitating the construction of water conservancy buildings inside the weir. When the flood season arrives, the water flow speed increases, which increases the torque of the water flow on the impeller 41. When the impeller 41 is able to drive the worm 39 to rotate, the worm 39 drives the drive ring 32 to rotate through the worm wheel 40, and through the cooperation of the first wedge block 36 and the second wedge block 37, the thrust of the pressure ring 31 on the first plate unit 18 or the second plate unit 19 is increased, so that the first plate unit 18 and the second plate unit 19 are driven to move toward each other in the longitudinal direction. Under the action of the trapezoidal inclined surfaces of the first support shell 21 and the second support shell 23, the adjacent first plate units 18 and the second plate units 19 are more closely matched, and the connection of the connecting structure 24 is also tighter, reducing the possibility of water leakage in the weir body.

[0043] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached 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); the fixing member (8) comprises a U-shaped fixing plate (10) fixedly connected to the inner wall of the upper support (1); 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); the bottom end of the diagonal rod (14) is fixedly connected to the riverbed outside the enclosure plate (3).

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 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.

5. The water conservancy construction cofferdam device according to claim 4 is characterized in that: 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.

6. The water conservancy construction cofferdam device according to claim 5, 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).

7. The water conservancy construction cofferdam device according to claim 6, 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).

8. The water conservancy construction cofferdam device according to claim 7, 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).

9. The water conservancy construction cofferdam device according to claim 4, 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).

10. The water conservancy construction cofferdam device according to claim 9, characterized in that: A water stop strip (28) is provided between the first folded edge (26) and the second folded edge (27).

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