Tunnel secondary lining buried waterstop positioning device

Abstract

The utility model relates to the field of tunnel construction equipment, and particularly discloses a tunnel secondary lining buried water stop positioning device which comprises a first clamping plate, a second clamping plate and a trolley end face plate used for being fixed to a secondary lining trolley, the first clamping plate is rotationally connected to the trolley end face plate, and the second clamping plate is rotationally connected to the first clamping plate. The first clamping plate and the second clamping plate are arranged in an opening and closing mode and used for clamping the water stop belt. An operator firstly rotates the first clamping plate to a preset position and locks rotation of the first clamping plate, then places one side edge of the water stop on the first clamping plate, finally rotates the second clamping plate, and finally makes the second clamping plate abut against the side, away from the first clamping plate, of the water stop. And the first clamping plate and the second clamping plate can clamp and position the water-stop belt, bending of the water-stop belt is reduced, and the problem that the water-stop belt is prone to being damaged is solved on the whole.

Description

Technical Field

[0001] The present application relates to the field of tunnel construction equipment, and in particular to a positioning device for a waterstop embedded in a secondary lining of a tunnel. Background Art

[0002] Composite lining is often built in tunnel construction. Composite lining includes secondary lining. Waterstop is often buried in the construction of secondary lining of tunnel.

[0003] In common tunnel secondary lining construction, positioning steel bar clips are often used to fold 1 / 2 of the width of the waterstop 90°, and then 1 / 2 of the waterstop is tightly fixed on the lining end formwork (usually a wooden formwork). The waterstop is cast together with the secondary lining, and the waterstop is straightened after the concrete is poured and the formwork is removed.

[0004] Regarding the above-mentioned related technologies, after the formwork is removed, the depth of the waterstop embedded in the concrete is inconsistent, and the waterstop is easily damaged when it is straightened. Utility Model Content

[0005] In order to improve the problem of easy damage to the waterstop, the present application provides a positioning device for the waterstop embedded in the secondary lining of a tunnel.

[0006] The present application provides a tunnel secondary lining embedded waterstop positioning device adopts the following technical solution:

[0007] A device for positioning a buried waterstop in a secondary lining of a tunnel comprises a first clamping plate, a second clamping plate and a trolley end panel for fixing on a secondary lining trolley, wherein the first clamping plate is rotatably connected to the trolley end panel, the second clamping plate is rotatably connected to the first clamping plate, the first clamping plate and the second clamping plate are open and closed, and the first clamping plate and the second clamping plate are used to clamp the waterstop.

[0008] By adopting the above technical solution, the operator first rotates the first clamp to a predetermined position and locks the rotation of the first clamp, then places one side of the waterstop on the first clamp, and finally rotates the second clamp to reduce the angle of the opening between the first clamp and the second clamp, so that the second clamp rests against the side of the waterstop away from the first clamp, and then locks the rotation of the second clamp. The first clamp and the second clamp can clamp and position the waterstop, reducing the bending of the waterstop and improving the problem of easy damage to the waterstop as a whole.

[0009] Optionally, a first baffle is fixedly provided on a side of the first clamping plate away from the second clamping plate, and the first baffle is used as a lower baffle of the end mold; a second baffle is fixedly provided on a side of the second clamping plate away from the first clamping plate, and the second baffle is used as an upper baffle of the end mold.

[0010] By adopting the above technical solution, when pouring the secondary lining, the first baffle and the second baffle cooperate with each other to support the pouring of the secondary lining concrete of the tunnel.

[0011] Optionally, the trolley end panel is fixedly provided with a hinge seat, and a first connecting plate is fixedly connected to a side of the first clamping plate close to the first baffle, and the first connecting plate is hinged on the hinge seat.

[0012] By adopting the above technical solution, the hinge seat cooperates with the first connecting plate to realize the rotational connection between the first clamping plate and the trolley end panel.

[0013] Optionally, a first hinge hole is provided on the first connecting plate, a mounting hole is provided on the hinge seat, a hinge rod is provided in the mounting hole, the hinge rod is located in the first hinge hole, and a locking assembly for locking the rotation of the first connecting plate is provided on the first connecting plate.

[0014] By adopting the above technical solution, the first hinge hole and the hinge rod cooperate with each other to realize the hinge connection between the first connecting plate and the hinge seat.

[0015] Optionally, the articulated rod includes a first bolt, the locking assembly includes a first nut, the first nut is threadedly connected to the first bolt, and the articulated seat and the first connecting plate are both located between the first nut and the nut of the first bolt.

[0016] By adopting the above technical solution, after the operator loosens the first nut, it is convenient for the operator to rotate the first connecting plate; after the operator tightens the first nut, the rotation of the first connecting plate can be firmly locked.

[0017] Optionally, the first hinge hole is a waist-shaped hole, and the length direction of the first hinge hole is parallel to the trolley end panel.

[0018] By adopting the above technical solution, after the operator loosens the first nut, he can slide the first connecting plate along the length direction of the first hinge hole, and can adjust the distance between the first clamping plate and the trolley end panel bracket. The operator can adjust the buried position of the water stop belt as needed.

[0019] Optionally, a fixing plate is fixedly provided on the trolley end panel, a limiting hole is provided on the fixing plate, a sleeve is fixedly provided on the first connecting plate, and the locking assembly includes a limiting tube, which is used to be inserted into the limiting hole and the sleeve.

[0020] By adopting the above technical solution, after the first connecting plate is rotated to a predetermined angle, the sleeve can be aligned with the limiting hole. The operator inserts the limiting tube into the limiting hole and the sleeve to securely lock the rotation of the first connecting plate.

[0021] Optionally, a second connecting plate is connected to a side of the second clamping plate away from the first clamping plate, and the second connecting plate is hinged to the first connecting plate.

[0022] By adopting the above technical solution, the rotational connection between the first clamping plate and the second clamping plate is achieved with the help of the second connecting plate.

[0023] Optionally, a telescopic plate is telescopically installed on one side of the second baffle plate close to the second clamping plate, and the telescopic plate is used as an upper baffle plate of the end mold.

[0024] By adopting the above-mentioned technical scheme, the telescopic plate can be controlled to slide and move away from the second clamping plate, so that the telescopic plate can be pressed against the inner wall of the tunnel, and the telescopic plate can support the pouring of secondary concrete in the tunnel; when the telescopic plate is pressed against the inner wall of the tunnel, the second clamping plate can be rotated and moved away from the first clamping plate to limit the position, thereby improving the stability of the clamping of the waterstop belt.

[0025] Optionally, a flexible baffle is fixedly provided on one side of the telescopic plate away from the second clamping plate, and the flexible baffle is used to fit the waterproof board.

[0026] By adopting the above technical solution, the flexible baffle is tightly attached to the waterproof board of the tunnel, thereby reducing the leakage of concrete during the secondary concrete pouring.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. The operator first rotates the first clamping plate to a predetermined position and locks the rotation of the first clamping plate. The operator then places one side of the water stop on the first clamping plate. The operator finally rotates the second clamping plate to reduce the angle of the opening between the first clamping plate and the second clamping plate, so that the second clamping plate abuts against the side of the water stop away from the first clamping plate. The rotation of the second clamping plate is then locked. The first clamping plate and the second clamping plate can clamp and position the water stop, reducing the bending of the water stop, and overall improving the problem of easy damage to the water stop.

[0029] 2. When pouring the secondary lining, the first baffle and the second baffle cooperate to support the pouring of the tunnel secondary lining concrete;

[0030] 3. Controlling the telescopic plate to slide and move away from the second clamping plate can make the telescopic plate press against the inner wall of the tunnel, and the telescopic plate can support the pouring of secondary concrete in the tunnel; when the telescopic plate presses against the inner wall of the tunnel, the second clamping plate can be rotated and moved away from the first clamping plate to limit the position, thereby improving the stability of the clamping of the waterstop. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0033] Figure 2 This is a partial structural diagram for demonstrating the installation of waterstop;

[0034] Figure 3 This is a partial structural diagram for displaying the panel structure at the end of the trolley;

[0035] Figure 4 It is a partial structural schematic diagram for showing the connection of the first clamping plate;

[0036] Figure 5 It is a partial structural schematic diagram for showing the connection of the second clamping plate;

[0037] Figure 6 This is a partial structural diagram for showing the arrangement of the positioning device.

[0038] Figure numerals: 1. first clamping plate; 11. first baffle plate; 12. first connecting plate; 121. first hinge hole; 122. hinge rod; 123. sleeve; 2. second clamping plate; 21. second baffle plate; 22. second connecting plate; 221. second hinge hole; 222. second bolt; 3. trolley end panel; 31. hinge seat; 32. fixing plate; 321. limiting hole; 4. locking assembly; 41. first nut; 42. limiting tube; 5. telescopic plate; 6. mounting ring; 61. sliding hole; 7. fixing bolt; 8. flexible baffle plate; 81. supporting layer; 82. flexible layer; 9. secondary concrete; 91. waterproof board; 10. second lining trolley. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1-6 This application is described in further detail.

[0040] The present application embodiment discloses a device for positioning a waterstop embedded in a secondary lining of a tunnel. Figure 1 and Figure 2 A positioning device for buried waterstop in secondary lining of a tunnel comprises a first clamping plate 1, a second clamping plate 2 and a trolley end panel 3 for fixing on a secondary lining trolley 10, wherein the first clamping plate 1 is rotatably connected to the trolley end panel 3, the second clamping plate 2 is rotatably connected to the first clamping plate 1, and the first clamping plate 1 and the second clamping plate 2 are open and closed, and the first clamping plate 1 and the second clamping plate 2 are used to clamp the waterstop. The operator first rotates the first clamping plate 1 to a predetermined position and locks the rotation of the first clamping plate 1, and then the operator places one side of the waterstop on the first clamping plate 1, and the operator finally rotates the second clamping plate 2 to reduce the angle of the opening between the first clamping plate 1 and the second clamping plate 2, and finally makes the second clamping plate 2 abut against the side of the waterstop away from the first clamping plate 1, and then locks the rotation of the second clamping plate 2, the first clamping plate 1 and the second clamping plate 2 can clamp and position the waterstop, reduce the bending of the waterstop, and improve the problem of easy damage to the waterstop as a whole.

[0041] The first clamping plate 1 and the second clamping plate 2 can both be arc-shaped plates, and the openings of the first clamping plate 1 and the second clamping plate 2 are close to the trolley end panel 3, and a water stop strip is sandwiched between the first clamping plate 1 and the second clamping plate 2.

[0042] Reference Figure 1 , Figure 3 and Figure 4 The trolley end panel 3 is welded to the secondary lining trolley 10. The trolley end panel 3 can also be fixed on the secondary lining trolley 10 by bolts, and the trolley end panel 3 is vertical. The trolley end panel 3 is located at one end of the length direction of the secondary lining trolley 10. A first baffle 11 is integrally cast on the side of the first clamping plate 1 close to the trolley end panel 3. After the first clamping plate 1 is rotated to a predetermined position, the first baffle 11 can be parallel to the trolley end panel 3, and the side of the first baffle 11 close to the secondary concrete 9 is against the trolley end panel 3, and the first baffle 11 is located on the side of the trolley end panel 3 away from the secondary concrete 9. The first baffle 11 can be used as a baffle under the end mold. When pouring the secondary concrete 9 in the tunnel, the first baffle 11 can support the pouring of the secondary concrete 9.

[0043] Reference Figure 1 and Figure 5 A second baffle plate 21 is integrally cast on the side of the second clamp plate 2 away from the first clamp plate 1. When the second clamp plate 2 clamps the water stop belt, the second baffle plate 21 can be made parallel to the first baffle plate 11. The second baffle plate 21 can be used as a baffle on the end mold. When the secondary concrete 9 is poured into the tunnel, the second baffle plate 21 can support the pouring of the secondary concrete 9.

[0044] Reference Figure 1 and Figure 3A hinge seat 31 is welded on the side of the trolley end panel 3 close to the first baffle 11, a first connecting plate 12 is welded on the side of the first clamping plate 1 close to the first baffle 11, the first connecting plate 12 is located on the side of the first baffle 11 away from the trolley end panel 3, and the first connecting plate 12 is hinged on the hinge seat 31. The hinge seat 31 cooperates with the first connecting plate 12 to realize the rotation connection between the first clamping plate 1 and the trolley end panel 3.

[0045] The first connecting plate 12 is welded to the first baffle 11, which further improves the structural strength of the first baffle 11. Two first connecting plates 12 and two articulated seats 31 are respectively provided, which further ensures the stability of the rotational connection between the first clamping plate 1 and the trolley end panel 3.

[0046] Furthermore, a first hinge hole 121 is provided on the first connecting plate 12, a mounting hole is provided on the hinge seat 31, a hinge rod 122 is provided in the mounting hole, the hinge rod 122 is located in the first hinge hole 121, and a locking assembly 4 for locking the rotation of the first connecting plate 12 is provided on the first connecting plate 12. The first hinge hole 121 and the hinge rod 122 cooperate to realize the hinge connection between the first connecting plate 12 and the hinge seat 31.

[0047] The hinge rod 122 is a first bolt, and the locking assembly 4 includes a first nut 41, which is connected to the first bolt, and the hinge seat 31 and the first connecting plate 12 are located between the first nut 41 and the nut of the first bolt. After the operator loosens the first nut 41, it is convenient for the operator to rotate the first connecting plate 12; by tightening the first nut 41, the operator can achieve a firm locking of the rotation of the first connecting plate 12.

[0048] The locking assembly 4 also includes a limiting tube 42, which is a steel tube. A fixing plate 32 is welded to one side of the trolley end panel 3 close to the hinge seat 31, and a limiting hole 321 is provided on the fixing plate 32. A sleeve 123 is welded to the first connecting plate 12. After the first clamping plate 1 is rotated to a predetermined position, the operator can insert the limiting tube 42 into the sleeve 123 and the limiting hole 321 in sequence, and the rotation of the first connecting plate 12 can be locked by means of the limiting tube 42. The sleeve 123 is connected to the limiting tube 42 by bolts, which improves the stability of the limiting tube 42 inserted into the sleeve 123.

[0049] Furthermore, the first hinge hole 121 is a waist-shaped hole, the length direction of the first hinge hole 121 is parallel to the trolley end panel 3, and the length direction of the first hinge hole 121 is parallel to the axis of the corresponding sleeve 123. After the operator loosens the first nut 41 and rotates the first clamping plate 1 to a predetermined position, the first connecting plate 12 can be slid along the length direction of the first hinge hole 121, thereby adjusting the distance between the first clamping plate 1 and the bracket of the trolley end panel 3, and the operator can adjust the buried position of the water stop as needed.

[0050] Reference Figure 1 and Figure 5 The second connecting plate 22 is connected to the side of the second clamping plate 2 away from the first clamping plate 1. The second connecting plate 22 is an L-shaped plate. The second connecting plate 22 is provided with a second hinge hole 221. The second hinge hole 221 is located on the side of the first clamping plate 1 away from the second clamping plate 2. The first connecting plate 12 is provided with a mounting hole. The opening direction of the first mounting hole is parallel to the opening direction of the first hinge hole 121. The second hinge hole 221 is aligned with the mounting hole. A second bolt 222 is inserted into the mounting hole. The second bolt 222 passes through the second hinge hole 221. The second bolt 222 is connected to a second nut. The first connecting plate 12 and the second connecting plate 22 are both located between the second nut and the nut of the second bolt 222.

[0051] With the help of the second bolt 222 and the second connecting plate 22, the second clamping plate 2 is connected to the first clamping plate 1 in rotation. After the operator rotates the second clamping plate 2 to a predetermined position, the operator tightens the second nut to achieve a secure locking of the rotation of the second clamping plate 2. The second connecting plate 22 is welded to the second baffle plate 21, which improves the strength of the second baffle plate 21. Two second connecting plates 22 are provided in a one-to-one correspondence with the first connecting plate 12, and the two second connecting plates 22 cooperate with each other, which improves the stability of the rotational connection between the first clamping plate 1 and the second clamping plate 2.

[0052] A telescopic plate 5 is telescopically installed on one side of the second baffle plate 21 close to the second clamp plate 2. The telescopic plate 5 abuts against the second clamp plate 2, and the telescopic plate 5 can be used as a baffle on the end mold. The telescopic plate 5 is controlled to slide and move away from the second clamp plate 2, so that the telescopic plate 5 can abut against the inner wall of the tunnel, and the telescopic plate 5 can support the pouring of the secondary concrete 9 of the tunnel; when the telescopic plate 5 abuts against the inner wall of the tunnel, the second clamp plate 2 can be rotated and away from the first clamp plate 1 to limit the position, thereby improving the stability of the clamping of the water stop.

[0053] A mounting ring 6 is welded to the side of the second baffle 21 close to the second clamping plate 2. The mounting ring 6 is a rectangular semi-ring. A sliding hole 61 is formed between the mounting ring 6 and the second baffle 21. The side of the telescopic plate 5 close to the second clamping plate 2 is located in the sliding hole 61. A threaded hole is opened through the mounting ring 6, and a fixing bolt 7 is installed in the threaded hole.

[0054] After the operator fixes the first clamping plate 1 and the second clamping plate 2 at the predetermined position, the operator first loosens the fixing bolt 7, which can facilitate the operator to slide the telescopic plate 5 and make the telescopic plate 5 away from the second clamping plate 2; after the operator slides the telescopic plate 5 to the predetermined position, the operator tightens the fixing bolt 7 so that the fixing bolt 7 is against the telescopic plate 5, thereby locking the sliding of the telescopic plate 5.

[0055] A flexible baffle plate 8 is fixedly provided on one side of the telescopic plate 5 away from the second clamping plate 2, and the flexible baffle plate 8 is used to fit the waterproof plate 91. The flexible baffle plate 8 can be an arc-shaped plate.

[0056] The waterproof board 91 is laid on the inner side of the tunnel, and the flexible baffle 8 is arc-shaped, so that the flexible baffle 8 fits tightly on the waterproof board 91 of the tunnel, reducing leakage between the flexible baffle 8 and the waterproof board 91, thereby reducing leakage of concrete during secondary concrete pouring.

[0057] The flexible baffle 8 includes a supporting layer 81 and a flexible layer 82. The supporting layer 81 is an arc-shaped steel plate and is welded to the side of the telescopic plate 5 away from the second clamping plate 2. The flexible layer 82 can be a rubber pad and is bonded to the side of the supporting layer 81 away from the second clamping plate 2.

[0058] When the operator controls the telescopic plate 5 to slide and approach the waterproof plate 91, the supporting layer 81 can support the flexible layer 82 so that the flexible layer 82 rests on the waterproof plate 91 on the inner side of the tunnel. The flexible layer 82 is elastic so that the flexible layer 82 can better fit the irregular plane of the waterproof plate 91, thereby reducing the puncture of the waterproof plate 91 and reducing the leakage of slurry between the telescopic plate 5 and the waterproof plate 91.

[0059] Reference Figure 1 , Figure 2 and Figure 6 The secondary concrete 9 is located between the waterproof board 91 and the secondary lining trolley 10. In the first pouring, part of the water stop is poured in the secondary concrete 9. The first baffle 11, the second baffle 21 and the telescopic plate 5 cooperate to support the pouring of the secondary concrete 9 from the end, and the side of the flexible layer 82 away from the supporting layer 81 is against the waterproof board 91, which reduces the gap between the waterproof board 91 and the flexible layer 82, and reduces the leakage of slurry at the waterproof board 91.

[0060] Multiple devices can be arranged in sequence along the circumference of the tunnel to ensure the support effect when pouring the secondary lining of the tunnel. Adjacent first baffles 11 can partially overlap, adjacent second baffles 21 can also partially overlap, and correspondingly, adjacent telescopic plates 5 can also partially overlap, reducing leakage of secondary concrete 9.

[0061] When constructing the secondary lining of a tunnel, multiple first clamps 1 and second clamps 2 can be set along the circumference of the tunnel. Multiple first clamps 1 and multiple second clamps 2 cooperate with each other to clamp the waterstop along the circumference of the tunnel, thereby ensuring the positioning effect of the waterstop.

[0062] The implementation principle of a positioning device for a buried waterstop in a secondary lining of a tunnel according to an embodiment of the present application is as follows: the operator first rotates the first clamp plate 1 to a predetermined position and locks the rotation of the first clamp plate 1, the operator then places one side of the waterstop on the first clamp plate 1, and the operator finally rotates the second clamp plate 2 to reduce the angle of the opening between the first clamp plate 1 and the second clamp plate 2, and finally makes the second clamp plate 2 rest against the side of the waterstop away from the first clamp plate 1, and then locks the rotation of the second clamp plate 2, the first clamp plate 1 and the second clamp plate 2 can clamp and position the waterstop, reduce the bending of the waterstop, and overall improve the problem of easy damage to the waterstop.

[0063] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second", "third" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and similar words do not indicate a quantitative limit, but indicate that there is at least one. "Include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0064] The above are all optional embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A positioning device for buried waterstop in secondary lining of a tunnel, characterized by: It includes a first clamping plate, a second clamping plate and a trolley end panel for fixing on the second lining trolley, the first clamping plate is rotatably connected to the trolley end panel, the second clamping plate is rotatably connected to the first clamping plate, the first clamping plate and the second clamping plate are opened and closed, and the first clamping plate and the second clamping plate are used to clamp the waterstop.

2. A device for positioning waterstop embedded in secondary lining of a tunnel according to claim 1, characterized in that: A first baffle is fixedly provided on one side of the first clamping plate away from the second clamping plate, and the first baffle is used as a lower baffle of the end mold. A second baffle is fixedly provided on one side of the second clamping plate away from the first clamping plate, and the second baffle is used as an upper baffle of the end mold.

3. A positioning device for embedded waterstop in secondary tunnel lining according to claim 2, characterized in that: The trolley end panel is fixedly provided with an articulated seat, and a first connecting plate is fixedly connected to a side of the first clamping plate close to the first baffle, and the first connecting plate is hinged on the articulated seat.

4. A device for positioning waterstop embedded in secondary lining of a tunnel according to claim 3, characterized in that: A first hinge hole is provided on the first connecting plate, a mounting hole is provided on the hinge seat, a hinge rod is provided in the mounting hole, the hinge rod is located in the first hinge hole, and a locking assembly for locking the rotation of the first connecting plate is provided on the first connecting plate.

5. A positioning device for embedded waterstop in secondary lining of a tunnel according to claim 4, characterized in that: The articulated rod includes a first bolt, the locking assembly includes a first nut, the first nut is threadedly connected to the first bolt, and the articulated seat and the first connecting plate are both located between the first nut and the nut of the first bolt.

6. A positioning device for embedded waterstop in secondary tunnel lining according to claim 5, characterized in that: The first hinge hole is a waist-shaped hole, and the length direction of the first hinge hole is parallel to the trolley end panel.

7. A positioning device for embedded waterstop in secondary tunnel lining according to claim 4, characterized in that: A fixing plate is fixedly provided on the trolley end panel, a limiting hole is provided on the fixing plate, a sleeve is fixedly provided on the first connecting plate, and the locking assembly comprises a limiting tube, which is used to be inserted into the limiting hole and the sleeve.

8. The device for positioning waterstop embedded in secondary lining of a tunnel according to claim 4, characterized in that: A second connecting plate is connected to a side of the second clamping plate away from the first clamping plate, and the second connecting plate is hinged to the first connecting plate.

9. The device for positioning waterstop embedded in secondary lining of a tunnel according to claim 2, characterized in that: A telescopic plate is telescopically mounted on one side of the second baffle plate close to the second clamping plate, and the telescopic plate is used as an upper baffle plate of the end mold.

10. A positioning device for embedded waterstop in secondary tunnel lining according to claim 9, characterized in that: A flexible baffle is fixedly provided on one side of the telescopic plate away from the second clamping plate, and the flexible baffle is used to fit the waterproof plate.

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