Water conservancy design construction cofferdam device and installation method thereof

Abstract

The invention discloses a water conservancy design construction cofferdam device, and relates to the technical field of construction cofferdams. The device comprises four corner plates, a plurality of insertion plates are arranged between the adjacent corner plates at intervals, baffles are arranged on the two sides of the corner plates and the insertion plates, the corner plates and the insertion plates are connected through the baffles, the adjacent insertion plates are connected through the baffles, and the corner plates, the insertion plates and the baffles are of a rectangular structure as a whole; the baffles are provided with attaching plates, the attaching plates are provided with bearing blocks, and the bearing blocks between the adjacent attaching plates are clamped by the clamping plates. The multi-layer sealing structure design is adopted, the attaching plates are installed on the two sides of the baffle and matched with the sealing strips which are arranged in a staggered mode, double sealing protection is formed, and especially due to the staggered attaching design of the sealing strips, the larger sealing area is provided, and pressurized sealing can be achieved under the water pressure effect; the invention further relates to an installation method of the water conservancy design and construction cofferdam device.

Description

Technical Field

[0001] The present invention relates to the technical field of construction cofferdams, and more specifically, it is a water conservancy design and construction cofferdam device. The present invention also relates to an installation method for such a water conservancy design and construction cofferdam device. Background Art

[0002] In the current field of water conservancy project construction, the installation and sealing of cofferdams have always been important technologies during the construction process. Traditional cofferdam designs usually require on-site assembly at the construction site. This on-site assembly method not only increases the construction difficulty but also directly affects the construction efficiency. Especially when installing the baffles, since the cofferdam needs to have good waterproof performance, it is required that there must be complete fitting and sealing between adjacent baffles. Such precise sealing requirements pose great challenges to on-site construction, especially in complex hydrological environments. Moreover, the effectiveness of the cofferdam system largely depends on the action of water pressure, which requires precise positioning and temporary fixation between the baffles during the installation process.

[0003] Existing cofferdam equipment lacks a convenient fixing mechanism. When installing the baffles, construction workers often need to control the positions of multiple baffles simultaneously to ensure that they are aligned and stable. This operation is not only time-consuming and laborious but also prone to installation deviations. Due to the lack of a suitable pre-fixing device, it is difficult for construction workers to temporarily fix the aligned parts, which results in the inability to make full use of water pressure to enhance the sealing effect. Water pressure should be an important factor in strengthening the sealing performance of the cofferdam, but if the pre-fixation is not in place, the water pressure may instead cause the sealing to fail. This not only increases the workload of later maintenance but also may cause leakage problems, seriously affecting the overall function of the cofferdam and the construction quality of the water conservancy project.

[0004] Therefore, it is necessary to develop a water conservancy design and construction cofferdam device and its installation method that can quickly pre-position and fix, have high stability, and good sealing performance. Summary of the Invention

[0005] The first object of the present invention is to overcome the deficiencies of the above background art and provide a water conservancy design and construction cofferdam device.

[0006] The second object of the present invention is to provide an installation method for such a water conservancy design and construction cofferdam device.

[0007] To achieve the above first object, the technical solution of the present invention is: a water conservancy design and construction cofferdam device, characterized in that: it includes four corner plates, and a plurality of insertion plates are arranged at intervals between adjacent corner plates. Baffles are provided on both sides of the corner plates and the insertion plates, and the corner plates and the insertion plates are connected by the baffles. Adjacent insertion plates are connected by the baffles, and the corner plates, the insertion plates, and the baffles as a whole form a rectangular structure;

[0008] The baffle is provided with a fitting plate, the fitting plate is provided with a receiving block, the fitting plates between adjacent baffles are fitted, and the receiving blocks between adjacent fitting plates are clamped by a clamping plate.

[0009] In the above technical solution, a plurality of sealing strips are arranged at intervals on the fitting surface of the fitting plate, and the sealing strips on the fitting surfaces of adjacent fitting plates are fitted in an interleaved manner.

[0010] In the above technical solution, a support frame is slidably clamped inside the angle plate, and the end of the support frame is connected to the clamping plate.

[0011] In the above technical solution, the angle between adjacent baffles exceeds 120 degrees, and the angle between the baffles arranged on both sides of the angle plate is 90 degrees.

[0012] In the above technical solution, a bottom rod is arranged at the bottom of the angle plate.

[0013] In the above technical solution, a fixing mechanism is further included. The fixing mechanism includes a pull rod, a bidirectional rod and a telescopic sleeve. A plurality of pull rods are arranged at intervals on the baffle, and the pull rods on adjacent baffles are connected to the bidirectional rod through the telescopic sleeve.

[0014] In the above technical solution, a plurality of variable-diameter grooves are equidistantly arranged on the inner wall of the telescopic sleeve, a clamping block is slidably connected in the variable-diameter groove, and the clamping block is in contact with the pull rod.

[0015] In the above technical solution, two rotating sleeves are symmetrically arranged on the bidirectional rod. The bidirectional rod is slidably connected with the rotating sleeves, and spiral grooves are opened at both ends of the bidirectional rod;

[0016] An inner nested sleeve is arranged on the rotating sleeve, an inner nested groove is opened on the inner wall of the telescopic sleeve, the inner nested sleeve is rotatably connected in the inner nested groove, a plurality of transverse holes are arranged along the spiral grooves on the rotating sleeve, a limiting sleeve is slidably connected to the rotating sleeve, and the limiting sleeve can cover or expose the transverse holes when sliding along the rotating sleeve;

[0017] A double-headed rod is slidably connected in the transverse hole, a return spring is installed at one end of the double-headed rod, and the other end is embedded in the spiral groove; the return spring abuts against the inner wall of the transverse hole.

[0018] In the above technical solution, an intermediate ring is arranged in the middle of the telescopic sleeve, a follower sleeve is slidably connected between the intermediate ring and the clamping block of the telescopic sleeve; an intermediate spring is fixedly installed on the intermediate ring; a synchronous ring is arranged on the follower sleeve close to the clamping block;

[0019] A push sleeve is installed on the limiting sleeve;

[0020] One end of the intermediate spring abuts against the push sleeve and the other end abuts against the follower sleeve;

[0021] A synchronization block is provided on the clamping block. The synchronization block extends out of the variable-diameter groove and penetrates through the synchronization ring, and the synchronization block is slidably connected to the synchronization ring.

[0022] In the above technical solution, a hexagonal groove is formed in the middle of the bidirectional rod; a hexagonal sleeve is slidably connected to the limiting sleeve, and the hexagonal sleeve is slidably connected to the bidirectional rod.

[0023] In the above technical solution, a friction groove is provided at the joint between the clamping block and the pull rod.

[0024] In order to achieve the above second object, the technical solution of the present invention is: an installation method of a cofferdam device for water conservancy design and construction, characterized by including the following steps:

[0025] Step 1: Insert the insertion plate and the bottom rod into the water bottom; fit the fitting plates on adjacent baffles so that the sealing strips on adjacent fitting plates are mutually staggered and fitted.

[0026] Step 2: Clamp the clamping plate on the receiving block on the adjacent fitting plate to complete the inner fixation of the adjacent baffles.

[0027] Step 3: Since the telescopic sleeve is slidably connected to the bidirectional rod, the bidirectional rod moves the rotating sleeves and telescopic sleeves at both ends towards the middle of the bidirectional rod, so that the distance between the telescopic sleeves at both ends of the bidirectional rod is less than the distance between the pull rods on two adjacent baffles.

[0028] Step 4: Place the telescopic sleeves at both ends of the bidirectional rod between the pull rods on adjacent baffles, pinch the push sleeve and the follower sleeve, so that the limiting sleeve and the follower sleeve move towards the direction of the middle ring, the limiting sleeve exposes the transverse hole, so that the limiting sleeve releases the fit with the double-headed rod; when the follower sleeve moves towards the direction of the middle ring, it will drive the synchronization ring to move towards the direction of the middle ring. Since the synchronization block is slidably connected in the synchronization ring, the clamping block will move towards the direction of the middle ring accordingly, so that the clamping block contracts. At this time, the diameter between multiple clamping blocks is greater than the diameter of the pull rod.

[0029] Step 5: Drive the bidirectional rod as a whole to move the rotating sleeves and telescopic sleeves at both ends towards the direction of the pull rod, so that multiple clamping blocks are located on the side wall of the pull rod. Release the push sleeve and the follower sleeve, and under the action of the middle spring, push the synchronization block to move outwards. The clamping block will contract along the variable-diameter groove, so that the clamping block is stuck on the side wall of the pull rod.

[0030] Step 6: Rotate the bidirectional rod so that the double-headed rod is embedded in the spiral groove, and then move the limiting sleeve to the position covering the transverse hole. At this time, the double-headed rod is in a limited state, one end abuts against the limiting sleeve, and one end is embedded in the spiral groove, forming a threaded connection between the rotating sleeve and the bidirectional rod.

[0031] Step 7: Clamp one wrench on the hexagonal groove and another wrench on the hexagonal sleeve. By rotating the hexagonal sleeve, the rotation of the rotating sleeve can be driven. Due to the threaded connection between the rotating sleeve and the bidirectional rod, a large pulling force will be generated. Then, through the connection between the inner nested sleeve and the rest, the rotational pulling force is converted into a vertical pulling force to complete the outer fixation of adjacent baffles.

[0032] Compared with the prior art, the present invention has the following advantages:

[0033] 1) The present invention adopts a multi-level sealing structure design. By installing fitting plates on both sides of the baffle and cooperating with the stagger-set sealing strips, a double-sealing protection is formed. In particular, the stagger-fitting design of the sealing strips not only provides a larger sealing area but also enables pressure sealing under the action of water pressure. When the water pressure increases, due to the angle design greater than 120 degrees formed between the baffles, the water pressure will automatically enhance the adhesion force between the sealing strips, thus forming a virtuous cycle system where the greater the water pressure, the tighter the seal. This design greatly improves the waterproof performance of the cofferdam.

[0034] 2) The present invention realizes the rapid fixation between the baffles through the cooperation of the receiving block and the clamping plate. This design enables construction workers to easily achieve temporary fixation during the installation process, greatly improving the construction efficiency. At the same time, the sliding clamping connection design of the support frame provides additional support force for the entire structure, ensuring the stability during the installation process.

[0035] 3) The present invention realizes a fast and stable connection through the combination of the bidirectional rod and the telescopic sleeve, in cooperation with the precise design of the variable-diameter groove and the clamping block. In particular, the cooperation design of the spiral groove and the double-headed rod not only provides a strong fixing force but also realizes precise tension adjustment. This design makes the entire fixing process simple and reliable, greatly reducing the construction difficulty. The operation process of the entire device is carefully designed, making the installation process simple and intuitive. Through the coordinated work of the push sleeve and the follower sleeve, in cooperation with the auxiliary effect of the intermediate spring, rapid pre-positioning and fixation are achieved. This user-friendly design greatly reduces the labor intensity of the operator and improves the work efficiency.

[0036] 4) The clamping block of the present invention fits on the side wall of the pull rod through the friction groove. Through the cooperation between the friction groove and the side wall of the pull rod, the friction force between the clamping block and the pull rod is enhanced, preventing the occurrence of slipping. At the same time, the uniform distribution of multiple friction grooves ensures uniform force application, improving the reliability and stability of the fixation.

[0037] 5) The inner nested sleeve of the present invention is rotatably connected in the inner embedding groove. Through the rotational connection between the inner nested sleeve and the inner embedding groove, the conversion from rotational motion to linear motion is realized, and the cooperation between the middle ring and the middle spring provides a stable pre-tightening force.

[0038] 6) The synchronization block of the present invention is slidably connected within the synchronization ring. Through the cooperation of the synchronization block and the synchronization ring, the synchronous movement of multiple clamping blocks is achieved, improving the reliability and stability of the fixing effect.

[0039] 7) The hexagonal sleeve of the present invention is slidably connected to the two-way rod. A hexagonal groove is provided on the two-way rod. Through the cooperation of the hexagonal sleeve and the hexagonal groove, a convenient wrench operation interface is provided, and at the same time, the reliable transmission of the rotational torque is ensured, greatly improving the convenience and efficiency of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 is a schematic structural diagram of the present invention.

[0041] Figure 2 is Figure 1 a partial enlarged view of A in

[0042] Figure 3 is a schematic structural diagram of the angle plate and the bottom rod.

[0043] Figure 4 is a schematic structural diagram of the fixing mechanism.

[0044] Figure 5 is a cross-sectional structural diagram of the two-way rod, the telescopic sleeve and the rotating sleeve.

[0045] Figure 6 is a cross-sectional structural diagram of the telescopic sleeve and the rotating sleeve.

[0046] Figure 7 is a schematic structural diagram of the two-way rod and the double-headed rod.

[0047] Figure 8 is a cross-sectional structural diagram of the double-headed rod and the rotating sleeve.

[0048] Figure 9 is a schematic structural diagram of the follower sleeve and the synchronization block.

[0049] Figure 10 is Figure 7 a partial enlarged view of B in

[0050] Among them, 100 - angle plate, 110 - support frame, 120 - bottom rod, 200 - insertion plate, 300 - baffle plate, 310 - fitting plate, 311 - sealing strip, 320 - receiving block, 400 - clamping plate, 500 - fixing mechanism, 510 - pull rod, 520 - bidirectional rod, 521 - spiral groove, 522 - hexagonal groove, 530 - telescopic sleeve, 531 - variable diameter groove, 532 - clamping block, 5321 - synchronous block, 5322 - friction groove, 533 - intermediate ring, 534 - follower sleeve, 5341 - synchronous ring, 535 - intermediate spring, 536 - embedded groove, 540 - rotating sleeve, 541 - inner nest, 542 - limiting sleeve, 5421 - hexagonal sleeve, 543 - push sleeve, 544 - transverse hole, 550 - double - headed rod, 551 - return spring. Detailed implementation mode

[0051] The implementation of the present invention will be described in detail below with reference to the accompanying drawings. However, they do not constitute a limitation to the present invention and are only for illustration purposes. At the same time, the advantages of the present invention will become clearer and easier to understand through the description.

[0052] Referring to the accompanying drawings, it can be seen that: as Figures 1-3 shown, a cofferdam device for water conservancy design and construction includes four angle plates 100. A plurality of insertion plates 200 are arranged at intervals between adjacent angle plates 100. Baffle plates 300 are arranged on both sides of the angle plates 100 and the insertion plates 200. The angle plates 100 and the insertion plates 200 are connected by the baffle plates 300, and adjacent insertion plates 200 are connected by the baffle plates 300. The angle plates 100, the insertion plates 200 and the baffle plates 300 as a whole form a rectangular structure;

[0053] The baffle plate 300 is provided with a fitting plate 310, and the fitting plate 310 is provided with a receiving block 320. The fitting plates 310 between adjacent baffle plates 300 are in contact, and the receiving blocks 320 between adjacent fitting plates 310 are clamped by the clamping plate 400.

[0054] A plurality of sealing strips 311 are arranged at intervals on the contact surface of the fitting plate 310, and the sealing strips 311 on the contact surfaces of adjacent fitting plates 310 are staggered and in contact.

[0055] A support frame 110 is slidably clamped inside the angle plate 100, and the end of the support frame 110 is connected to the clamping plate 400. It is equivalent to that the support frame 110 provides a stable basic support on the two fitting plates 310.

[0056] The angle between adjacent baffle plates 300 exceeds 120 degrees, and the angle between the baffle plates 300 arranged on both sides of the angle plate 100 is 90 degrees

[0057] The bottom of the angle plate 100 is provided with a bottom rod 120.

[0058] As Figure 2 andFigure 4 As shown in the figure, a cofferdam device for hydraulic design and construction further includes a fixing mechanism 500. The fixing mechanism 500 includes a pull rod 510, a bidirectional rod 520, and a telescopic sleeve 530. A plurality of the pull rods 510 are arranged at intervals on the baffle 300, and the pull rods 510 on adjacent baffles 300 are connected to the bidirectional rod 520 through the telescopic sleeve 530.

[0059] As Figure 5 shown in the figure, a plurality of variable-diameter grooves 531 are equidistantly formed on the inner wall of the telescopic sleeve 530. A clamping block 532 is slidably connected in the variable-diameter groove 531, and the clamping block 532 is attached to the pull rod 510.

[0060] As Figure 2 and Figure 5 shown in the figure, two rotating sleeves 540 are symmetrically arranged on the bidirectional rod 520. The bidirectional rod 520 is slidably connected to the rotating sleeve 540, and spiral grooves 521 are formed at both ends of the bidirectional rod 520;

[0061] As Figure 6 shown in the figure, an inner nest 541 is arranged on the rotating sleeve 540. An inner embedding groove 536 is formed on the inner wall of the telescopic sleeve 530. The inner nest 541 is rotatably connected in the inner embedding groove 536. A plurality of transverse holes 544 are arranged along the spiral groove 521 on the rotating sleeve 540. A limiting sleeve 542 is slidably connected to the rotating sleeve 540. When the limiting sleeve 542 slides along the rotating sleeve 540, it can cover or expose the transverse holes 544; the plurality of transverse holes 544 are divided into two diagonal rows;

[0062] A double-headed rod 550 is slidably connected in the transverse hole 544. A return spring 551 is installed at one end of the double-headed rod 550, and the other end is embedded in the spiral groove 521; the return spring 551 abuts against the inner wall of the transverse hole 544.

[0063] An intermediate ring 533 is arranged in the middle of the telescopic sleeve 530. A follower sleeve 534 is slidably connected between the intermediate ring 533 and the clamping block 532 of the telescopic sleeve 530; an intermediate spring 535 is fixedly installed on the intermediate ring 533; a synchronous ring 5341 is arranged at a section of the follower sleeve 534 close to the clamping block 532;

[0064] A push sleeve 543 is installed on the limiting sleeve 542;

[0065] One end of the intermediate spring 535 abuts against the push sleeve 543 and the other end abuts against the follower sleeve 534;

[0066] As Figure 9 shown in the figure, a synchronous block 5321 is arranged on the clamping block 532. The synchronous block 5321 extends out of the variable-diameter groove 531 and penetrates through the synchronous ring 5341. The synchronous block 5321 is slidably connected to the synchronous ring 5341.

[0067] As Figure 5 shown, a hexagonal groove 522 is formed in the middle of the bidirectional rod 520; a hexagonal sleeve 5421 is slidably connected to the limiting sleeve 542, and the hexagonal sleeve 5421 is slidably connected to the bidirectional rod 520.

[0068] As Figure 9 shown, a friction groove 5322 is provided at the joint of the clamping block 532 and the pull rod 510.

[0069] An installation method of a cofferdam device for water conservancy design and construction includes the following steps:

[0070] Step 1: First, determine according to the position and requirements that multiple baffles 300 are needed to seal the corresponding positions, and insert the insertion plate 200 and the bottom rod 120 into the water bottom; fit the fitting plates 310 on adjacent baffles 300 so that the sealing strips 311 on adjacent fitting plates 310 are mutually staggered and fitted.

[0071] Step 2: Clamp the clamping plate 400 on the receiving block 320 on adjacent fitting plates 310 to complete the inner fixation of adjacent baffles 300.

[0072] Step 3: Since the telescopic sleeve 530 is slidably connected to the bidirectional rod 520, the bidirectional rod 520 moves the rotating sleeves 540 and the telescopic sleeve 530 at both ends towards the middle of the bidirectional rod 520, so that the distance between the telescopic sleeves 530 at both ends of the bidirectional rod 520 is less than the distance between the pull rods 510 on two adjacent baffles 300.

[0073] Step 4: Place the telescopic sleeves 530 at both ends of the bidirectional rod 520 between the pull rods 510 on adjacent baffles 300, pinch the push sleeve 543 and the follower sleeve 534, so that the limiting sleeve 542 and the follower sleeve 534 move towards the direction of the middle ring 533, the limiting sleeve 542 exposes the transverse hole 544, so that the limiting sleeve 542 releases the fit with the double-headed rod 550; when the follower sleeve 534 moves towards the direction of the middle ring 533, it will drive the synchronous ring 5341 to move towards the direction of the middle ring 533. Since the synchronous block 5321 is slidably connected in the synchronous ring 5341, the clamping block 532 will move towards the direction of the middle ring 533 accordingly, so that the clamping block 532 contracts. At this time, the diameter between multiple clamping blocks 532 is greater than the diameter of the pull rod 510.

[0074] Step 5: Drive the bidirectional rod 520 as a whole to move the rotating sleeves 540 and the telescopic sleeve 530 at both ends towards the direction of the pull rod 510, so that multiple clamping blocks 532 are located on the side wall of the pull rod 510. Release the push sleeve 543 and the follower sleeve 534, and under the action of the middle spring 535, push the synchronous block 5321 to move outwards, and the clamping block 532 will contract along the variable diameter groove 531, so that the clamping block 532 is stuck on the side wall of the pull rod 510.

[0075] Step 6: Rotate the two-way rod 520 so that the double-headed rod 550 is embedded in the spiral groove 521, and then move the limit sleeve 542 to the position covering the transverse hole 544. At this time, the double-headed rod 550 is in a limited state, with one end abutted against the limit sleeve 542 and the other end embedded in the spiral groove 521, forming a threaded connection between the rotating sleeve 540 and the two-way rod 520;

[0076] Step 7: Clamp a wrench on the hexagonal groove 522 and another wrench on the hexagonal sleeve 5421. By rotating the hexagonal sleeve 5421, the rotation of the rotating sleeve 540 can be driven. Due to the threaded connection between the rotating sleeve 540 and the two-way rod 520, a large pulling force will be generated. Then, through the connection between the inner nested sleeves 541 and 531, the rotational pulling force is converted into a vertical pulling force to complete the outer fixation of the adjacent baffles 300.

[0077] When actually installing the present invention, first, fit the two telescopic sleeves 530 along the two-way rod 520 as close as possible. Then, place the two rotating sleeves 540 between the two pull rods 510. Then, hold the push sleeve 543 and the follower sleeve 534 with both hands respectively, so that the push sleeve 543 and the follower sleeve 534 are respectively fitted on the middle ring 533, and then drive the telescopic sleeves 530 at both ends to be respectively sleeved on the pull rods 510 on both sides. At this time, release both hands, and then rotate the two-way rod 520 so that the two-way rod 520 is stuck in the spiral groove 521. Finally, tighten with a wrench to complete the fixing process; the entire operation process is carefully designed to make the installation process simple and intuitive.

[0078] The present invention can block the water in the outer circle of the cofferdam and also the water in the inner circle. Here, taking blocking the water in the inner circle as an example, when there is water in the inner circle, the water in the inner circle will exert a corresponding pressure on the baffle 300. Then, since the angle formed between two adjacent baffles 300 exceeds 120 degrees, the pressure generated by the water pressure will be squeezed between the two fitting plates 310, and then it is ensured that the two fitting plates 310 are further sealed. By increasing the corresponding sealing force through the water pressure, the sealing effect is further ensured.

[0079] Other parts not described belong to the prior art.

Claims

1. A water conservancy design and construction cofferdam device, characterized in that: The invention comprises four angle plates (100), a plurality of insert plates (200) are arranged at intervals between adjacent angle plates (100), baffle plates (300) are arranged on both sides of the angle plates (100) and the insert plates (200), the angle plates (100) and the insert plates (200) are connected via the baffle plates (300), and adjacent insert plates (200) are connected via the baffle plates (300), and the angle plates (100), the insert plates (200) and the baffle plates (300) are overall in a rectangular structure; The baffle (300) is provided with a bonding plate (310), and the bonding plate (310) is provided with a receiving block (320). The bonding plates (310) between adjacent baffles (300) are bonded, and the receiving blocks (320) between adjacent bonding plates (310) are clamped by a clamping plate (400).

2. A water conservancy design and construction cofferdam device according to claim 1, characterized in that: A plurality of sealing strips (311) are arranged at intervals on the bonding surfaces of the bonding plates (310), and the sealing strips (311) on the bonding surfaces of adjacent bonding plates (310) are staggered and bonded.

3. A water conservancy design and construction cofferdam device according to claim 1, characterized in that: A support frame (110) is slidably engaged with the inner side of the angle plate (100), and an end of the support frame (110) is connected to the clamping plate (400).

4. A water conservancy design and construction cofferdam device according to claim 1, characterized in that: The angle between adjacent baffles (300) exceeds 120 degrees, and the angle between the baffles (300) arranged on both sides of the angle plate (100) is 90 degrees.

5. A water conservancy design and construction cofferdam device according to claim 1, characterized in that: A bottom rod (120) is provided at the bottom of the angle plate (100).

6. A water conservancy design and construction cofferdam device according to claim 5, characterized in that: It also includes a fixing mechanism (500), the fixing mechanism (500) including a pull rod (510), a bidirectional rod (520) and a telescopic sleeve (530), a plurality of the pull rods (510) are arranged at intervals on the baffle (300), and the pull rods (510) on adjacent baffles (300) are connected to the bidirectional rod (520) via the telescopic sleeve (530).

7. A water conservancy design and construction cofferdam device according to claim 6, characterized in that: The inner wall of the telescopic sleeve (530) is provided with a plurality of diameter-changing grooves (531) at equal intervals, and a clamping block (532) is slidably connected in the diameter-changing groove (531), and the clamping block (532) is fitted with the pull rod (510).

8. A water conservancy design and construction cofferdam device according to claim 7, characterized in that: Two rotating sleeves (540) are symmetrically arranged on the bidirectional rod (520), the bidirectional rod (520) and the rotating sleeves (540) are slidably connected, and spiral grooves (521) are formed at both ends of the bidirectional rod (520); The rotating sleeve (540) is provided with an inner nest (541), an inner nest groove (536) is opened on the inner wall of the telescopic sleeve (530), the inner nest (541) is rotatably connected in the inner nest groove (536), the rotating sleeve (540) is provided with a plurality of transverse holes (544) along the spiral groove (521), the rotating sleeve (540) is slidably connected with a limiting sleeve (542), and the limiting sleeve (542) can cover or expose the transverse holes (544) when sliding along the rotating sleeve (540); A double-headed rod (550) is slidably connected in the transverse hole (544), a return spring (551) is installed at one end of the double-headed rod (550), and the other end is embedded in the spiral groove (521); the return spring (551) abuts against the inner wall of the transverse hole (544).

9. A water conservancy design and construction cofferdam device according to claim 8, characterized in that: The telescopic sleeve (530) is provided with an intermediate ring (533) in the middle, and the telescopic sleeve (530) is slidably connected with a follower sleeve (534) between the intermediate ring (533) and the clamping block (532); an intermediate spring (535) is fixedly mounted on the intermediate ring (533); and a synchronizing ring (5341) is provided at a section of the follower sleeve (534) close to the clamping block (532); A push sleeve (543) is installed on the limiting sleeve (542); One end of the intermediate spring (535) contacts the push sleeve (543), and the other end contacts the follower sleeve (534); A synchronization block (5321) is arranged on the clamping block (532). The synchronization block (5321) extends out of the diameter-reducing groove (531) and penetrates the synchronization ring (5341). The synchronization block (5321) is slidably connected to the synchronization ring (5341).

10. A water conservancy design and construction cofferdam device according to claim 9, characterized in that: A hexagonal groove (522) is formed in the middle of the bidirectional rod (520); a hexagonal sleeve (5421) is slidably connected to the limiting sleeve (542), and the hexagonal sleeve (5421) is slidably connected to the bidirectional rod (520).

11. A water conservancy design and construction cofferdam device according to claim 10, characterized in that: A friction groove (5322) is provided at the joint between the clamping block (532) and the pull rod (510).

12. The method for installing a water conservancy design and construction cofferdam device according to claim 11, characterized in that: The following steps are involved: Step 1: insert the insert plate (200) and the bottom rod (120) into the bottom of the water; fit the bonding plates (310) on the adjacent baffle plates (300) together so that the sealing strips (311) on the adjacent bonding plates (310) are interlaced and fit with each other; Step 2: clamp the clamping plate (400) on the receiving block (320) on the adjacent laminating plate (310) to complete the inner fixing of the adjacent baffle plate (300); Step 3: Since the telescopic sleeve (530) is slidably connected to the bidirectional rod (520), the bidirectional rod (520) moves the rotating sleeves (540) and the telescopic sleeves (530) at both ends toward the middle of the bidirectional rod (520), so that the distance between the telescopic sleeves (530) at both ends of the bidirectional rod (520) is smaller than the distance between the pull rods (510) on two adjacent baffles (300); Step 4: Place the telescopic sleeves (530) at both ends of the bidirectional rod (520) between the pull rods (510) on the adjacent baffles (300), pinch the push sleeve (543) and the follower sleeve (534), move the limiting sleeve (542) and the follower sleeve (534) toward the middle circle (533), and expose the transverse hole (544) of the limiting sleeve (542), so that the limiting sleeve (542) is released from the fit with the double-headed rod (550); The follower sleeve (534) moves toward the middle ring (533), which drives the synchronous ring (5341) to move toward the middle ring (533). Since the synchronous block (5321) is slidably connected in the synchronous ring (5341), the clamping block (532) moves toward the middle ring (533), causing the clamping block (532) to shrink. At this time, the diameter between the multiple clamping blocks (532) is greater than the diameter of the pull rod (510); Step 5: The bidirectional rod (520) is driven as a whole to move the rotating sleeve (540) and the telescopic sleeve (530) at both ends toward the direction of the pull rod (510), so that the multiple clamping blocks (532) are located on the side wall of the pull rod (510), and the push sleeve (543) and the follower sleeve (534) are loosened. Under the action of the intermediate spring (535), the synchronous block (5321) is pushed outward, and the clamping block (532) will shrink along the reducing groove (531), so that the clamping block (532) is clamped on the side wall of the pull rod (510); Step 6: Rotate the bidirectional rod (520) so that the double-headed rod (550) is embedded in the spiral groove (521), and then move the limiting sleeve (542) to a position covering the transverse hole (544). At this time, the double-headed rod (550) is in a limited state, with one end abutting against the limiting sleeve (542) and the other end embedded in the spiral groove (521), forming a threaded connection between the rotating sleeve (540) and the bidirectional rod (520); Step 7: Place a wrench on the hexagonal slot (522) and another wrench on the hexagonal sleeve (5421). By rotating the hexagonal sleeve (5421), the rotating sleeve (540) can be pulled to rotate. Due to the threaded connection between the rotating sleeve (540) and the bidirectional rod (520), a large pulling force is generated. Then, through the connection between the inner nest (541) and (531), the rotational pulling force is converted into a vertical pulling force, thereby completing the outer fixing of the adjacent baffle (300).

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