Water conservancy construction cofferdam device

Abstract

The application discloses a water conservancy construction cofferdam device and relates to the technical field of water conservancy cofferdams, which comprises a spliced cofferdam, wherein the spliced cofferdam comprises a fixed cylinder arranged on one side of the spliced cofferdam, and rotating holes are formed in the two ends of the fixed cylinder. Through the arrangement of the protection mechanism, the rotating unit can drive the rotating ring and the fixed track to rotate during the lifting of the fixed cylinder by the telescopic hydraulic cylinder, then the servo motor is started to drive the connecting seat, the sliding block, the mounting block and the mounting rod to move through the rotation of the threaded rod, the rotation of the threaded rod drives the rotating shaft to rotate through the driving bevel gear and the driven bevel gear, the rotating shaft drives the sunshade waterproof cloth to be unwound, the sunshade waterproof cloth can be unfolded to provide sunshade and rain protection for the workers, the water can be prevented from entering the spliced cofferdam, the sunshade waterproof cloth, the fixed track and the fixed cylinder can be stored when not in use, and thus the construction is not affected.

Description

Technical Field

[0001] This invention relates to the field of water conservancy cofferdam technology, and in particular to a water conservancy construction cofferdam device. Background Technology

[0002] A cofferdam is a temporary retaining structure built in water conservancy projects to construct permanent water conservancy facilities. Its function is to prevent water and soil from entering the construction site of the structure, so as to facilitate drainage, excavation of foundation pits, and construction of structures within the cofferdam. It is generally used in hydraulic engineering. Except when it is part of a formal building, a cofferdam is usually dismantled after use. The height of the cofferdam is higher than the highest water level that may occur during the construction period. Therefore, the stability, waterproofness, and ease of dismantling and assembly of the cofferdam are of great importance.

[0003] Chinese patent CN112523235A discloses a cofferdam device for water conservancy construction, which includes a cofferdam plate set on the underwater ground. The cofferdam plate includes a left half cofferdam and a right half cofferdam, which are detachably and fixedly connected. A water trough is provided on the side of the cofferdam plate away from the underwater ground. A water conveying mechanism for draining water from the cofferdam plate into the water trough is provided between the water trough and the cofferdam plate.

[0004] However, the above invention has the following shortcomings: Most existing water conservancy cofferdams cannot provide shade and rain protection for construction workers during hot and rainy weather. When there is heavy rain, rainwater will accumulate inside the cofferdam, which will affect the construction progress. The sunshade and waterproof cloth installed on a few water conservancy cofferdams need to be opened and closed manually, which is inconvenient to use. Moreover, the storage effect of the sunshade and waterproof cloth is not ideal, which affects the construction workers. Summary of the Invention

[0005] The purpose of this invention is to provide a cofferdam device for hydraulic construction. A servo motor drives a threaded rod, which in turn moves a sliding block, a mounting block, and a mounting rod via a connecting seat. The rotation of the threaded rod drives a rotating shaft to rotate via a driving bevel gear and a driven bevel gear. The rotation of the rotating shaft causes the sunshade and waterproof cloth to unroll until it covers the top of the spliced ​​cofferdam. The sunshade and waterproof cloth is inclined, which can effectively drain water. This invention enables the sunshade and waterproof cloth to provide shade and rain protection for workers when unfolded, while also preventing rainwater from entering the spliced ​​cofferdam, thus solving the problems mentioned in the background art.

[0006] The technical solution of the present invention is: a cofferdam device for water conservancy construction, comprising a spliced ​​cofferdam, wherein the spliced ​​cofferdam includes a fixed cylinder disposed on one side of the spliced ​​cofferdam, both ends of the fixed cylinder are provided with rotating holes, and a rotating shaft is rotatably connected in both of the two rotating holes, and further comprising;

[0007] A sunshade and waterproof fabric, which is wound around the rotating shaft;

[0008] The protective mechanism is located on the fixed cylinder;

[0009] The protective mechanism includes a storage unit, a lifting unit, and a rotating unit. The storage unit includes rotating rings rotatably connected to the outer cylindrical walls at both ends of the fixed cylinder. Fixed tracks are fixedly connected to the outer cylindrical walls of both rotating rings. Sliding blocks are slidably connected to both fixed tracks. Mounting blocks are fixedly connected to one side of each sliding block. Mounting rods are fixedly connected to the sides of the two mounting blocks that are close to each other. A strip-shaped discharge port is provided on the inner wall of the fixed cylinder. One end of the sunshade and waterproof cloth passes through the strip-shaped discharge port and is fixedly connected to the mounting rod. A servo motor is fixedly connected to one of the rotating rings. The output end of the servo motor is connected to a threaded rod via a coupling. A connecting seat is screwed onto the threaded rod. One end of the connecting seat is fixedly connected to one of the sliding blocks. A driving bevel gear is keyed onto the threaded rod. A driven bevel gear is keyed to one end of the rotating shaft. The driving bevel gear meshes with the driven bevel gear.

[0010] Preferably, one end of the fixed track is fixedly connected to a bracket, and one end of the threaded rod is rotatably connected to one side of the bracket.

[0011] Preferably, the lifting unit includes a telescopic hydraulic cylinder fixedly connected to one side of the spliced ​​cofferdam. The output end of the telescopic hydraulic cylinder is fixedly connected to the outer cylindrical wall of the fixed cylinder. Two fixed rods are fixedly connected to one side of the spliced ​​cofferdam. Each of the two fixed rods has a sliding groove at its top end. Each of the two sliding grooves has a movable rod slidably connected to its top end. The top ends of the two movable rods are fixedly connected to the outer cylindrical wall of the fixed cylinder.

[0012] Preferably, the rotating unit includes two fixed slide rails fixedly connected to one side of the spliced ​​cofferdam, each fixed slide rail having a sliding seat slidably connected to it, each of the two rotating rings having a fixed block fixedly connected to one side, and each of the two sliding seats having a connecting rod rotatably connected to both of the two fixed blocks.

[0013] Preferably, one side of one of the rotating rings is fixedly connected to an L-shaped limiting rod, and an arc-shaped limiting groove is provided on the outer cylindrical wall of the fixed cylinder, with the bottom end of the L-shaped limiting rod extending into the arc-shaped limiting groove.

[0014] Preferably, telescopic rods are fixedly connected to the sides of the two fixed tracks that are close to each other, and rotating rods are fixedly connected to one end of each of the two telescopic rods. Movable grooves are opened at the top of each of the two rotating rods, and sliding rods are slidably connected in each of the two movable grooves. Fixed cylinders are fixedly connected to the top side walls of each of the two sliding rods. A set of slots is opened at the top of both sides of the spliced ​​cofferdam, and the two fixed cylinders are respectively adapted to the two sets of slots.

[0015] Preferably, each of the two movable slots is provided with a telescopic spring, and the two ends of the two telescopic springs are respectively fixedly connected to the rotating rod and the sliding rod.

[0016] Preferably, each of the two fixed tracks is fixedly connected to a rod on the side closest to each other, and each of the two rotating rods is provided with a slot on the side furthest from each other, with one end of each of the two rods extending into the two slots respectively.

[0017] Preferably, one end of each of the two insertion rods is provided with a groove, and a magnet is fixedly connected in each of the two grooves. The two magnets are in contact with the inner walls of the two slots respectively.

[0018] This invention provides an improved cofferdam device for hydraulic construction, which has the following improvements and advantages compared with the prior art:

[0019] Firstly, this invention, through the setting of a protective mechanism, allows the telescopic hydraulic cylinder to drive the fixed cylinder to rise. During this process, the rotating unit drives the rotating ring and fixed track to rotate. Then, the servo motor is activated, which drives the connecting seat, sliding block, mounting block, and mounting rod to move via the rotation of the threaded rod. The rotation of the threaded rod drives the rotating shaft to rotate via the driving bevel gear and the driven bevel gear. The rotation of the rotating shaft drives the sunshade and waterproof cloth to unroll until the mounting rod moves to one end of the fixed track. This allows the mounting rod to carry the sunshade and waterproof cloth to cover the top of the spliced ​​cofferdam. When the sunshade and waterproof cloth is unfolded, it can provide sun and rain protection for the workers and prevent rainwater from entering the spliced ​​cofferdam. When not in use, the sunshade and waterproof cloth, fixed track, and fixed cylinder can be stored away, thus not affecting the construction.

[0020] Secondly, this invention, through the setting of the rotating unit, when the fixed cylinder is raised, when the sliding seat moves to the top of the fixed slide rail, the sliding seat stops moving and drives the rotating ring to rotate on the fixed cylinder through the connecting rod and the fixed block. The rotation of the rotating ring drives the fixed track, the sliding block, the mounting block and the mounting rod to rotate. When the L-shaped limiting rod moves to the bottom of the arc-shaped limiting groove, the telescopic hydraulic cylinder stops extending. Since the arc length of the arc-shaped limiting groove is less than one-quarter of the circumference of the fixed cylinder, the fixed track is in an inclined state, realizing the automatic support of the fixed track, so that the sunshade waterproof cloth is inclined, which facilitates drainage.

[0021] Thirdly, this invention unfolds the sunshade and waterproof cloth, pulls the rotating rod outward to disengage it from the insert rod, the rotating rod moves and causes the telescopic rod to extend, the rotating rod rotates and causes the sliding rod and the fixed cylinder to move, and puts the fixed cylinder into the slot, which, together with the telescopic spring, supports the fixed track and improves the stability of the fixed track. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0024] Figure 2 This is a three-dimensional structural diagram of the protective mechanism in this invention;

[0025] Figure 3 This is a schematic diagram of the three-dimensional structure of the storage unit in this invention;

[0026] Figure 4 This is a three-dimensional structural diagram of the sliding block, mounting block, and mounting rod in this invention.

[0027] Figure 5 For the present invention Figure 1 Enlarged structural diagram at point A in the middle;

[0028] Figure 6 This is a schematic diagram of the internal cross-sectional planar structure of the fixed cylinder in this invention;

[0029] Figure 7 This is a schematic diagram of the internal cross-sectional planar structure of the rotating rod in this invention;

[0030] Figure 8 For the present invention Figure 7 Enlarged structural diagram at point B.

[0031] Figure label:

[0032] 1. Interlocking cofferdam; 101. Slot; 102. Fixed rod; 103. Movable rod; 104. Fixed cylinder; 105. Telescopic hydraulic cylinder; 106. Rotating shaft; 107. Sunshade and waterproof cloth; 108. Driven bevel gear; 109. Strip discharge port; 2. Rotating ring; 201. Fixed block; 202. Connecting rod; 203. Sliding seat; 204. Fixed slide rail; 205. Fixed track; 206. Sliding... 1. Block; 207. Mounting block; 208. Mounting rod; 209. L-shaped limiting rod; 210. Arc-shaped limiting groove; 3. Servo motor; 301. Threaded rod; 302. Connecting seat; 303. Bracket; 304. Drive bevel gear; 4. Telescopic rod; 401. Rotating rod; 402. Movable groove; 403. Sliding rod; 404. Fixed cylinder; 405. Telescopic spring; 406. Insert rod; 407. Magnet block. Detailed Implementation

[0033] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] This invention provides an improved cofferdam device for hydraulic construction. The technical solution of this invention is as follows:

[0035] like Figures 1 to 8 As shown, this embodiment of the invention provides a cofferdam device for water conservancy construction, including a spliced ​​cofferdam 1. The spliced ​​cofferdam 1 includes a fixed cylinder 104 disposed on one side of the spliced ​​cofferdam 1. Rotating holes are provided at both ends of the fixed cylinder 104, and a rotating shaft 106 is rotatably connected in both rotating holes. The device also includes:

[0036] Sunshade and waterproof fabric 107 is wrapped around rotating shaft 106;

[0037] The protective mechanism is located on the fixed cylinder 104;

[0038] The protective mechanism includes a storage unit, a lifting unit, and a rotating unit. The storage unit includes rotating rings 2 rotatably connected to the outer cylindrical walls at both ends of a fixed cylinder 104. Fixed rails 205 are fixedly connected to the outer cylindrical walls of both rotating rings 2. Sliding blocks 206 are slidably connected to both fixed rails 205. Mounting blocks 207 are fixedly connected to one side of each sliding block 206. Mounting rods 208 are fixedly connected to the sides of the two mounting blocks 207 that are close to each other. A strip-shaped discharge port 109 is provided on the inner wall of the fixed cylinder 104. One end of the sunshade and waterproof cloth 107 passes through the strip-shaped discharge port 109 and is fixedly connected to the mounting rod 208. A servo motor 3 is fixedly connected to one of the rotating rings 2. The output end of the servo motor 3 is connected to a threaded rod 301 via a coupling. A connecting seat 302 is screwed onto the threaded rod 301, and one end of the connecting seat 302 is fixedly connected to it. On a sliding block 206, a drive bevel gear 304 is keyed to a threaded rod 301, and a driven bevel gear 108 is keyed to one end of a rotating shaft 106. The drive bevel gear 304 meshes with the driven bevel gear 108. Through the setting of the storage unit, the servo motor 3 drives the threaded rod 301 to move the sliding block 206, the mounting block 207, and the mounting rod 208 through the connecting seat 302. The rotation of the threaded rod 301 drives the rotating shaft 106 to rotate through the drive bevel gear 304 and the driven bevel gear 108. The rotation of the rotating shaft 106 drives the sunshade and waterproof cloth 107 to unroll until the sunshade and waterproof cloth 107 covers the top of the spliced ​​cofferdam 1. The sunshade and waterproof cloth 107 is inclined, which can effectively drain water. When the sunshade and waterproof cloth 107 is unfolded, it can provide sunshade and rain protection for the staff and prevent rainwater from entering the spliced ​​cofferdam 1.

[0039] Furthermore, a bracket 303 is fixedly connected to one side wall of one of the fixed rails 205, and one end of the threaded rod 301 is rotatably connected to one side of the bracket 303; through the setting of the bracket 303, the bracket 303 can support the threaded rod 301, thereby improving the stability of the threaded rod 301.

[0040] Furthermore, the lifting unit includes a telescopic hydraulic cylinder 105 fixedly connected to one side of the spliced ​​cofferdam 1. The output end of the telescopic hydraulic cylinder 105 is fixedly connected to the outer cylindrical wall of the fixed cylinder 104. Two fixed rods 102 are fixedly connected to one side of the spliced ​​cofferdam 1. Each of the top ends of the two fixed rods 102 is provided with a sliding groove. Each of the top ends of the two sliding grooves is slidably connected to a movable rod 103. The top ends of the two movable rods 103 are fixedly connected to the outer cylindrical wall of the fixed cylinder 104. Through the setting of the lifting unit, the telescopic hydraulic cylinder 105 can drive the fixed cylinder 104 to rise and fall. The fixed rods 102, in conjunction with the movable rods 103, can limit the movement of the fixed cylinder 104, thereby improving the stability of the fixed cylinder 104.

[0041] Furthermore, the rotating unit includes two fixed slide rails 204 fixedly connected to one side of the spliced ​​cofferdam 1. Sliding seats 203 are slidably connected to both fixed slide rails 204. Fixed blocks 201 are fixedly connected to one side of both rotating rings 2. Connecting rods 202 are rotatably connected to both sliding seats 203 and fixed blocks 201 respectively. With the setting of the rotating unit, when the fixed cylinder 104 is raised, when the sliding seats 203 move to the top of the fixed slide rails 204, the rotating rings 2 can be driven to rotate through the connecting rods 202 and fixed blocks 201. The rotation of the rotating rings 2 drives the fixed slide rails 204 to rotate. When the fixed cylinder 104 is lowered, the fixed rails 205 are reset, realizing the automatic lifting or lowering of the fixed rails 205.

[0042] Furthermore, an L-shaped limiting rod 209 is fixedly connected to one side of one of the rotating rings 2, and an arc-shaped limiting groove 210 is provided on the outer cylindrical wall of the fixed cylinder 104. The bottom end of the L-shaped limiting rod 209 extends into the arc-shaped limiting groove 210. Through the setting of the L-shaped limiting rod 209, it cooperates with the arc-shaped limiting groove 210 to limit the rotation ring 2 and the fixed track 205.

[0043] Furthermore, telescopic rods 4 are fixedly connected to the sides of the two fixed tracks 205 that are close to each other. A rotating rod 401 is fixedly connected to one end of each of the two telescopic rods 4. A movable groove 402 is opened at the top of each of the two rotating rods 401. A sliding rod 403 is slidably connected in each of the two movable grooves 402. A fixed cylinder 404 is fixedly connected to the top side wall of each of the two sliding rods 403. A set of slots 101 is opened on the top of both sides of the spliced ​​cofferdam 1. The two fixed cylinders 404 are respectively adapted to the two sets of slots 101. A telescopic spring 405 is provided in each of the two movable grooves 402. The two ends of the two telescopic springs 405 are fixedly connected to the rotating rod 401 and the sliding rod 403 respectively. Through the arrangement of the telescopic rods 4 and their cooperation with the fixed tracks 205, the sliding rods 403, the fixed cylinders 404 and the telescopic springs 405, the fixed tracks 205 are supported, and the stability of the fixed tracks 205 is improved.

[0044] Furthermore, each of the two fixed tracks 205 has a fixed rod 406 fixedly connected to the side of each other that is close to each other, and each of the two rotating rods 401 has a slot on the side of each other that is far from each other. One end of each of the two rods 406 extends into the two slots, and one end of each of the two rods 406 has a groove. A magnet 407 is fixedly connected to each of the two grooves, and the two magnets 407 are in contact with the inner walls of the two slots. Through the arrangement of the rods 406 and the cooperation of the magnets 407, the magnets 407 can attract the rotating rods 401, thereby fixing the rotating rods 401.

[0045] Specific implementation steps: During use, when encountering hot or rainy weather, the telescopic hydraulic cylinder 105 is activated to lift the fixed cylinder 104. The movement of the fixed cylinder 104 moves the movable rod 103. Simultaneously, the movement of the fixed cylinder 104 moves the two rotating rings 2, the fixed rail 205, the sliding block 206, the mounting block 207, and the mounting rod 208. The movement of the rotating rings 2 moves the servo motor 3 and the threaded rod 301. The fixed cylinder 104 also moves the two fixed blocks 201, the connecting rod 202, and the sliding seat 203. When the sliding seat 203 moves to the top of the fixed rail 204, the sliding seat 203 stops moving and... The connecting rod 202 drives the fixed block 201 to rotate, which in turn drives the rotating ring 2 to rotate on the fixed cylinder 104. The rotation of the rotating ring 2 drives the fixed track 205, sliding block 206, mounting block 207, and mounting rod 208 to rotate. Simultaneously, the rotating ring 2 drives the L-shaped limiting rod 209 to move within the arc-shaped limiting groove 210. When the L-shaped limiting rod 209 reaches the bottom of the arc-shaped limiting groove 210, the telescopic hydraulic cylinder 105 stops extending. Because the arc length of the arc-shaped limiting groove 210 is less than one-quarter of the circumference of the fixed cylinder 104, the fixed track 205 is tilted. The servo motor 3 is then activated to drive the threaded rod 301 to rotate. The rotation of the threaded rod 301 drives the connecting seat 302 to move. The movement of the connecting seat 302 drives the sliding block 206, the mounting block 207, and the mounting rod 208 to move. The mounting rod 208 moves to unfold the sunshade and waterproof cloth 107. The rotation of the threaded rod 301 drives the rotating shaft 106 to rotate via the driving bevel gear 304 and the driven bevel gear 108. The rotation of the rotating shaft 106 drives the sunshade and waterproof cloth 107 to unroll until the mounting rod 208 moves to one end of the fixed track 205. This allows the mounting rod 208 to carry the sunshade and waterproof cloth 107 to cover the spliced ​​cofferdam 1. The sunshade and waterproof cloth 107 is inclined, which can effectively drain water without the need for additional drainage. When the servo motor 3 is started, it rotates in the reverse direction to drive the rotating shaft 106 to roll up the sunshade and waterproof cloth 107. At the same time, the threaded rod 301 drives the sliding block 206, the mounting block 207 and the mounting rod 208 to reset through the connecting seat 302. Then, the telescopic hydraulic cylinder 105 is started to drive the fixed cylinder 104 to reset. At this time, the fixed track 205 resets to the vertical state under its own weight. This realizes that when the sunshade and waterproof cloth 107 is unfolded, it can provide sunshade and rain protection for the staff and prevent rainwater from entering the spliced ​​cofferdam 1. When not in use, the sunshade and waterproof cloth 107, the fixed track 205 and the fixed cylinder 104 can be stored, so as not to affect the construction.

[0046] After unfolding the sunshade and waterproof cloth 107, pull the rotating rod 401 outward to disengage it from the insert rod 406. The movement of the rotating rod 401 causes the telescopic rod 4 to extend. Rotating the rotating rod 401 causes the sliding rod 403 and the fixed cylinder 404 to move, and the fixed cylinder 404 is placed into the slot 101. The telescopic spring 405 supports the fixed track 205, improving the stability of the fixed track 205.

[0047] The foregoing description enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cofferdam device for hydraulic construction, comprising a spliced ​​cofferdam (1), characterized in that: The spliced ​​cofferdam (1) includes a fixed cylinder (104) disposed on one side of the spliced ​​cofferdam (1), and both ends of the fixed cylinder (104) are provided with rotating holes, and a rotating shaft (106) is rotatably connected in both rotating holes, and also includes; A sunshade and waterproof fabric (107) is wrapped around the rotating shaft (106); A protective mechanism is located on the fixed cylinder (104); The protective mechanism includes a storage unit, a lifting unit, and a rotating unit. The storage unit includes rotating rings (2) rotatably connected to the outer cylindrical walls at both ends of the fixed cylinder (104). Fixed rails (205) are fixedly connected to the outer cylindrical walls of both rotating rings (2). Sliding blocks (206) are slidably connected to both fixed rails (205). Mounting blocks (207) are fixedly connected to one side of each sliding block (206). Mounting rods (208) are fixedly connected to the sides of the two mounting blocks (207) that are close to each other. A strip-shaped discharge port (109) is provided on the inner wall of the fixed cylinder (104). One side of the sunshade waterproof cloth (107)... The end of the shaft passes through the strip outlet (109) and is fixedly connected to the mounting rod (208). A servo motor (3) is fixedly connected to one of the rotating rings (2). The output end of the servo motor (3) is connected to a threaded rod (301) through a coupling. A connecting seat (302) is screwed onto the threaded rod (301). One end of the connecting seat (302) is fixedly connected to one of the sliding blocks (206). A driving bevel gear (304) is keyed onto the threaded rod (301). A driven bevel gear (108) is keyed onto one end of the rotating shaft (106). The driving bevel gear (304) meshes with the driven bevel gear (108). The rotating unit includes two fixed slide rails (204) fixedly connected to one side of the spliced ​​cofferdam (1), and sliding seats (203) are slidably connected to both fixed slide rails (204). A fixed block (201) is fixedly connected to one side of each of the two rotating rings (2). A connecting rod (202) is rotatably connected to both the two sliding seats (203) and the two fixed blocks (201).

2. The cofferdam device for hydraulic construction according to claim 1, characterized in that: One of the fixed rails (205) has a bracket (303) fixedly connected to one side wall, and one end of the threaded rod (301) is rotatably connected to one side of the bracket (303).

3. A cofferdam device for hydraulic construction according to claim 2, characterized in that: The lifting unit includes a telescopic hydraulic cylinder (105) fixedly connected to one side of the spliced ​​cofferdam (1). The output end of the telescopic hydraulic cylinder (105) is fixedly connected to the outer cylindrical wall of the fixed cylinder (104). Two fixed rods (102) are fixedly connected to one side of the spliced ​​cofferdam (1). The top of each of the two fixed rods (102) is provided with a sliding groove. The top of each of the two sliding grooves is slidably connected with a movable rod (103). The top of each of the two movable rods (103) is fixedly connected to the outer cylindrical wall of the fixed cylinder (104).

4. A cofferdam device for hydraulic construction according to claim 3, characterized in that: One of the rotating rings (2) is fixedly connected to an L-shaped limiting rod (209) on one side. An arc-shaped limiting groove (210) is provided on the outer cylindrical wall of the fixed cylinder (104). The bottom end of the L-shaped limiting rod (209) extends into the arc-shaped limiting groove (210).

5. A cofferdam device for hydraulic construction according to claim 4, characterized in that: Telescopic rods (4) are fixedly connected to one side of each of the two fixed tracks (205) that are close to each other. Rotating rods (401) are fixedly connected to one end of each of the two telescopic rods (4). Movable grooves (402) are opened at the top of each of the two rotating rods (401). Sliding rods (403) are slidably connected in each of the two movable grooves (402). Fixed cylinders (404) are fixedly connected to the top side walls of each of the two sliding rods (403). A set of slots (101) are opened at the top of each side of the spliced ​​cofferdam (1). The two fixed cylinders (404) are respectively adapted to the two sets of slots (101).

6. A cofferdam device for hydraulic construction according to claim 5, characterized in that: Each of the two movable slots (402) is provided with a telescopic spring (405), and the two ends of the two telescopic springs (405) are fixedly connected to the rotating rod (401) and the sliding rod (403), respectively.

7. A cofferdam device for hydraulic construction according to claim 6, characterized in that: Each of the two fixed rails (205) has a plug rod (406) fixedly connected to the side of each other that is close to each other, and each of the two rotating rods (401) has a slot on the side of each other that is far apart from each other, and one end of each of the plug rods (406) extends into the two slots respectively.

8. A cofferdam device for hydraulic construction according to claim 7, characterized in that: Each of the two insertion rods (406) has a groove at one end, and a magnet (407) is fixedly connected in each of the two grooves. The two magnets (407) are in contact with the inner walls of the two slots respectively.

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