A cofferdam structure for water stop of a wedge-shaped concrete wall surface

Abstract

The application discloses a cofferdam structure for water stopping of a wedge-shaped concrete wall surface and relates to the technical field of cofferdam structures.The cofferdam structure comprises a first cofferdam plate, a first connecting plate is fixed to one side of the first cofferdam plate, a second cofferdam plate is movably connected to one side of the first connecting plate, a second connecting plate is fixed to one side of the second cofferdam plate, and locators are fixed to both sides of the second connecting plate.The locator comprises an adjusting block, a fixed plate is fixed to one side of the adjusting block, a tension spring is fixed to one side of the fixed plate, and an adjusting plate is fixed to one end of the tension spring.A clamping rod is fixed to one side of the adjusting plate.The cofferdam structure can be flexibly installed into a wedge-shaped concrete wall surface through the cooperation of the second cofferdam plate and a third cofferdam plate (not shown in the drawings).The arc-shaped structure can better fill the wedge-shaped space compared with the traditional circular structure cofferdam, and the distance between the two first cofferdam plates can be flexibly adjusted, so that the cofferdam structure can be applied to wedge-shaped concrete wall surfaces with different lengths, and the application range of the cofferdam structure is wider.

Description

Technical Field

[0001] This invention belongs to the field of cofferdam structure technology, and in particular relates to a cofferdam structure for water-stopping wedge-shaped concrete walls. Background Technology

[0002] A cofferdam is a temporary retaining structure built in hydraulic engineering projects to construct permanent hydraulic facilities. Its function is to prevent water and soil from entering the construction site, allowing for drainage, excavation of the foundation pit, and construction of the structure. It is primarily used in hydraulic engineering structures and, unless part of a permanent building, is generally dismantled after use. The cofferdam's height is higher than the highest water level that may occur during the construction period.

[0003] The typical cofferdam structure is circular. While cylindrical cofferdams are easier to install, their applicability is limited. For example, when constructing on wedge-shaped concrete walls, the wedge shape has a certain angle, making it difficult for a typical circular cofferdam to fit properly, which leads to difficulties in subsequent construction. Summary of the Invention

[0004] The purpose of this invention is to provide a cofferdam structure for water-stopping wedge-shaped concrete walls. Through the action of the second and third cofferdam plates, the device can be flexibly installed into the wedge-shaped concrete wall. The space enclosed by the first, second, and third cofferdam plates is located close to one side of the concrete wall. Compared to traditional circular cofferdam structures, the arc-shaped structure can better fill the wedge-shaped space. Furthermore, the distance between the two first cofferdam plates can be flexibly adjusted, making the device applicable to wedge-shaped concrete walls of different lengths, thus broadening its applicability. This solves the problem that existing circular cofferdams cannot be properly fitted and installed, leading to difficulties in subsequent construction.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A cofferdam structure for water-stopping wedge-shaped concrete walls includes a first cofferdam plate, and a first connecting plate is fixed to one side of the first cofferdam plate;

[0007] A second cofferdam plate is movably connected to one side of the first connecting plate, a second connecting plate is fixed to one side of the second cofferdam plate, and locators are fixed to both sides of the second connecting plate.

[0008] The positioner includes an adjusting block, a fixing plate is fixed to one side of the adjusting block, a tension spring is fixed to one side of the fixing plate, and the adjusting plate is fixed to one end of the tension spring;

[0009] A locking rod is fixed to one side of the adjusting plate, and the locking rod passes through the fixing plate.

[0010] A third cofferdam plate is slidably connected to the outer side of the second cofferdam plate;

[0011] A third connecting plate is fixed on one side of the third cofferdam plate, an adjustment groove is opened on one side of the third cofferdam plate, and sliding grooves are opened on both sides of the third cofferdam plate.

[0012] The third cofferdam plate has several positioning holes on the side near the clamp rod;

[0013] The third cofferdam plate is movably connected to another first cofferdam plate on the side away from the second cofferdam plate;

[0014] The first connecting plate, the second connecting plate, and the third connecting plate all have first threaded holes on their surfaces;

[0015] A positioning rod passes through the first threaded hole, and a first threaded tube is threadedly connected to the outer ring of the positioning rod;

[0016] The bottom of the first cofferdam slab is fixed with ground-holding nails.

[0017] The present invention is further configured such that: a reinforcing groove is formed on one side of the first connecting plate, and a reinforcing strip is fixed on one side of both the second and third connecting plates;

[0018] The reinforcing strip has a rectangular structure and matches the reinforcing groove.

[0019] The present invention is further configured such that: a plurality of first support plates are fixed on the inner wall of the first cofferdam plate, and a support is movably connected between two first support plates;

[0020] The first support plate has a first placement hole on its surface;

[0021] The support includes a connecting rod.

[0022] The present invention is further configured such that: an adjusting tube is fixed on one side of the connecting rod;

[0023] A positioning plate is fixed to one side of the other connecting rod, and a bearing is fixed to one side of the positioning plate. A rotating rod is fixed to the inner ring of the bearing.

[0024] The present invention is further configured such that: a movable plate is fixed to one end of the rotating rod, and a threaded rod is fixed to one side of the movable plate;

[0025] The threaded rod is threadedly connected to the inner wall of the regulating pipe.

[0026] The present invention is further configured such that: the surface of the positioning plate has a plurality of fixing holes;

[0027] A telescopic rod is fixed to one side of the movable plate, and a mounting plate is fixed to one end of the telescopic rod;

[0028] A spring is fitted onto the outer side of the telescopic rod;

[0029] A fixing rod is fixed to one side of the mounting plate, and the fixing rod passes through the fixing hole.

[0030] The present invention is further configured such that: a mounting rod is fixed to the bottom of the connecting rod, and the mounting rod passes through the first placement hole;

[0031] The bottom of the mounting rod is threaded with a second threaded tube.

[0032] The present invention is further configured such that: a plurality of second support plates are fixed on the inner side of the third cofferdam plate, and the surface of the second support plates is provided with second placement holes;

[0033] An installation tube is movably connected to the outside of the regulating tube, and a hinge is fixed on one side of the installation tube;

[0034] A reinforcing plate is fixed to one side of the mounting tube, and a second threaded hole is opened on the surface of the reinforcing plate;

[0035] The second placement hole is coaxial with the second threaded hole;

[0036] A fastening plate is fixed to the side of the mounting tube away from the reinforcing plate, and a third threaded hole is opened on the surface of the fastening plate.

[0037] The present invention has the following beneficial effects:

[0038] 1. Through the action of the second and third cofferdam plates, this invention allows the device to be flexibly installed into a wedge-shaped concrete wall. The space enclosed by the first, second, and third cofferdam plates is close to one side of the concrete wall. Compared with the traditional circular cofferdam structure, the arc-shaped structure can better fill the wedge-shaped space. At the same time, the distance between the two first cofferdam plates can be flexibly adjusted, making the device applicable to wedge-shaped concrete walls of different lengths, thus broadening its applicability.

[0039] 2. The present invention utilizes the support device. After adjusting to a suitable length, the support device is inserted into a suitable position. The support device can provide further support for the first cofferdam plates at both ends, avoiding deformation or misalignment of the first cofferdam plates during use. At the same time, the length of the support device can be flexibly adjusted, making it more convenient for the device to be applied to wedge-shaped concrete walls of different lengths.

[0040] 3. By fixing the installation tube, the device can further support the first, second, and third cofferdam plates, making the inner wall of the device more robust and stable, thereby improving the device's performance.

[0041] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0042] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a schematic diagram of a cofferdam structure for water-stopping a wedge-shaped concrete wall according to the present invention.

[0044] Figure 2 This is a schematic diagram of the structure from a low angle, representing the present invention.

[0045] Figure 3 This is a schematic diagram of the side view structure of the present invention.

[0046] Figure 4 This is a schematic diagram of the first cofferdam plate structure of the present invention.

[0047] Figure 5 This is a schematic diagram of the second cofferdam plate structure of the present invention.

[0048] Figure 6 For the present invention Figure 5 Enlarged view of a section of the initial section of the middle A-level map.

[0049] Figure 7 This is a schematic diagram of the third cofferdam plate structure of the present invention.

[0050] Figure 8 This is a side view structural diagram of the third cofferdam plate of the present invention.

[0051] Figure 9 This is a schematic diagram of the support structure of the present invention.

[0052] Figure 10 For the present invention Figure 9 Enlarged view of section B in the middle.

[0053] Figure 11 This is a schematic diagram of the fastening plate structure of the present invention.

[0054] The attached diagram lists the components represented by each number as follows:

[0055] 1-First cofferdam plate, 2-First connecting plate, 3-Second cofferdam plate, 4-Second connecting plate, 5-Positioner, 6-Adjusting block, 7-Fixing plate, 8-Tension spring, 9-Adjusting plate, 10-Clamping rod, 11-Third cofferdam plate, 12-Third connecting plate, 13-Adjusting groove, 14-Sliding groove, 15-Positioning hole, 16-First threaded hole, 17-Positioning rod, 18-First threaded tube, 19-Grip nail, 20-Reinforcement groove, 21-Reinforcement strip, 22-First support plate, 23-Supporter, 2 4-First placement hole, 25-Connecting rod, 26-Adjusting tube, 27-Positioning plate, 28-Bearing, 29-Rotating rod, 30-Modible plate, 31-Threaded rod, 32-Fixing hole, 33-Telescopic rod, 34-Mounting plate, 35-Spring, 36-Fixing rod, 37-Mounting rod, 38-Second threaded tube, 39-Second support plate, 40-Second placement hole, 41-Mounting tube, 42-Hinge, 43-Reinforcing plate, 44-Second threaded hole, 45-Fastening plate, 46-Third threaded hole. Detailed Implementation

[0056] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0057] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0058] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0059] Example 1

[0060] Please see Figure 1-11 The present invention provides the following technical solutions:

[0061] Specifically, it refers to a cofferdam structure for waterstopping wedge-shaped concrete walls, including a first cofferdam plate 1, with a first connecting plate 2 fixed to one side of the first cofferdam plate 1; a second cofferdam plate 3 is movably connected to one side of the first connecting plate 2, with a second connecting plate 4 fixed to one side of the second cofferdam plate 3, and positioners 5 fixed to both sides of the second connecting plate 4; each positioner 5 includes an adjusting block 6, with a fixing plate 7 fixed to one side of the adjusting block 6, a tension spring 8 fixed to one side of the fixing plate 7, and an adjusting plate 9 fixed to one end of the tension spring 8; a locking rod 10 is fixed to one side of the adjusting plate 9, penetrating the fixing plate 7; a third cofferdam plate 11 is slidably connected to the outside of the second cofferdam plate 3; a third connecting plate 12 is fixed to one side of the third cofferdam plate 11, and an adjusting groove 13 is opened on one side of the third cofferdam plate 11. The third cofferdam plate 11 has sliding grooves 14 on both sides; several positioning holes 15 are opened on the side of the third cofferdam plate 11 near the clamping rod 10; another first cofferdam plate 1 is movably connected to the side of the third cofferdam plate 11 away from the second cofferdam plate 3; the surfaces of the first connecting plate 2, the second connecting plate 4, and the third connecting plate 12 all have first threaded holes 16; a positioning rod 17 passes through the first threaded hole 16, and a first threaded tube 18 is threaded to the outer ring of the positioning rod 17; a ground anchor 19 is fixed to the bottom of the first cofferdam plate 1; a reinforcing groove 20 is opened on one side of the first connecting plate 2, and a reinforcing strip 21 is fixed on one side of the second connecting plate 4 and the third connecting plate 12; the reinforcing strip 21 has a rectangular structure and matches the reinforcing groove 20; during use, the second cofferdam plate The second connecting plate 4 on one side and the third connecting plate 12 on the other side of the third cofferdam plate 11 are both fixed to the first cofferdam plate 1 by positioning rods 17, forming a shape of first cofferdam plate 1-second cofferdam plate 3-third cofferdam plate 11-first cofferdam plate 1, and keeping the ground anchor 19 on one side of the first cofferdam plate 1 in contact with the ground. After roughly assembling the device in the wedge-shaped concrete wall, the distance between the second cofferdam plate 3 and the third cofferdam plate 11 is adjusted according to the specifications of the wall. After fixing the first cofferdam plate 1 closer to the second cofferdam plate 3, the first cofferdam plate 1 on the other side is pulled, and the first cofferdam plate 1 moves outward. During the movement, the adjusting plate 9 is pulled at the same time, and the adjusting plate 9 drives the locking rod 10 to interact outward, so that the locking rod 10 After leaving the positioning hole 15, once the first cofferdam plate 1, which is close to the third cofferdam plate 11, moves to the appropriate position, release your hand. Under the force of the tension spring 8, the locking block 10 will engage with the positioning hole 15 in the appropriate position, allowing adjustment of the distance between the second cofferdam plate 3 and the third cofferdam plate 11. This device can be flexibly installed into the wedge-shaped concrete wall, placing the space enclosed by the first cofferdam plate 1, the second cofferdam plate 3, and the third cofferdam plate 11 close to one side of the concrete wall. Compared to the traditional circular cofferdam structure, the arc-shaped structure can better fill the wedge-shaped space. At the same time, the distance between the two first cofferdam plates 1 can be flexibly adjusted, making the device applicable to wedge-shaped concrete walls of different lengths, thus broadening its applicability.

[0062] Example 2

[0063] Please see Figure 9-10 Based on Embodiment 1, the present invention provides the following technical solution:

[0064] A plurality of first support plates 22 are fixed to the inner wall of the first cofferdam plate 1, and a support 23 is movably connected between two first support plates 22; a first placement hole 24 is opened on the surface of the first support plate 22; the support 23 includes a connecting rod 25; an adjusting pipe 26 is fixed to one side of one connecting rod 25; a positioning plate 27 is fixed to one side of the other connecting rod 25, a bearing 28 is fixed to one side of the positioning plate 27, and a rotating rod 29 is fixed to the inner ring of the bearing 28; a movable plate 30 is fixed to one end of the rotating rod 29, and a threaded rod 31 is fixed to one side of the movable plate 30; the threaded rod 31 is threadedly connected to the inner wall of the adjusting pipe 26; a plurality of fixing holes 32 are opened on the surface of the positioning plate 27; a telescopic rod 33 is fixed to one side of the movable plate 30, and an installation plate 34 is fixed to one end of the telescopic rod 33; a spring 35 is sleeved on the outside of the telescopic rod 33; a fixing rod 36 is fixed to one side of the installation plate 34, and the fixing rod 36 passes through. Fixing hole 32; In use, after fixing the first cofferdam plate 1, the second cofferdam plate 3, and the third cofferdam plate 11, insert the mounting rods 37 on both sides of the support 23 into the first placement hole 24 in a suitable position. If it is necessary to adjust the length of the support 23, the mounting plate 34 can be pulled first so that the fixing rod 36 on one side of the mounting plate 34 leaves the fixing hole 32, and then the threaded rod 31 can be rotated. The threaded rod 31 rotates on the inner wall of the adjusting tube 26 to increase the length of the support 23. After adjusting to a suitable length, the support 23 can be inserted into a suitable position. The support 23 can provide further support for the first cofferdam plate 1 at both ends, avoiding deformation or position deviation of the first cofferdam plate 1 during use. At the same time, the length of the support 23 can be flexibly adjusted, making it more convenient for the device to be applied to wedge-shaped concrete walls of different lengths.

[0065] Example 3

[0066] Please see Figure 11 Based on Embodiment 2, the present invention provides the following technical solution:

[0067] Several second support plates 39 are fixed to the inner side of the third cofferdam plate 11, and the surface of the second support plates 39 has a second placement hole 40; an installation pipe 41 is movably connected to the outer side of the adjusting pipe 26, and a hinge 42 is fixed to one side of the installation pipe 41; a reinforcing plate 43 is fixed to one side of the installation pipe 41, and a second threaded hole 44 is opened on the surface of the reinforcing plate 43; the second placement hole 40 and the second threaded hole 44 are coaxial; a fastening plate 45 is fixed to the side of the installation pipe 41 away from the reinforcing plate 43, and a third threaded hole 46 is opened on the surface of the fastening plate 45; during use, if further support is required for the inner wall of the device, it can be... The installation tube 41 is fitted onto the outside of the threaded rod 31 and the adjusting tube 26. Then, the two fastening plates 45 on one side of the installation tube 41 are rotated. The fastening plates 45 clamp the second support plate 39 on the surface of the third cofferdam plate 11. After clamping the second support plate 39 on the outside, bolts or other tools are turned into the second placement hole 40, and then bolts are turned into the second threaded hole 44 to fix the installation tube 41. This device can further support the first cofferdam plate 1, the second cofferdam plate 3 and the third cofferdam plate 11, thereby making the inner wall of the device more robust and stable, and thus making the device more effective.

[0068] The working principle of the cofferdam structure for water-stopping wedge-shaped concrete walls provided by this invention is as follows: During use, the second connecting plate 4 on one side of the second cofferdam plate 3 and the third connecting plate 12 on one side of the third cofferdam plate 11 are both fixed to the first cofferdam plate 1 by positioning rods 17, thus forming a shape of first cofferdam plate 1 - second cofferdam plate 3 - third cofferdam plate 11 - first cofferdam plate 1. The ground anchor 19 on one side of the first cofferdam plate 1 is kept in contact with the ground. After roughly assembling the device within the wedge-shaped concrete wall, the second cofferdam plate 3 and the third connecting plate 12 are then adjusted according to the wall specifications. The distance between the three cofferdam plates 11 is adjusted by fixing the first cofferdam plate 1 closest to the second cofferdam plate 3, then pulling the first cofferdam plate 1 on the other side causes it to move outward. During this movement, the adjusting plate 9 is pulled, causing the locking rod 10 to move outward, disengaging it from the positioning hole 15. When the first cofferdam plate 1 closest to the third cofferdam plate 11 moves to the appropriate position, the hand is released. Under the force of the tension spring 8, the locking block 10 engages in the positioning hole 15, thus adjusting the distance between the second cofferdam plate 3 and the third cofferdam. The distance between plates 11 is adjusted. During use, after fixing the first cofferdam plate 1, the second cofferdam plate 3, and the third cofferdam plate 11, insert the mounting rods 37 on both sides of the support 23 into the first placement holes 24 at suitable positions. If the length of the support 23 needs adjustment, first pull the mounting plate 34 so that the fixing rod 36 on one side of the mounting plate 34 leaves the fixing hole 32, then rotate the threaded rod 31. The threaded rod 31 rotates on the inner wall of the adjusting tube 26, thereby increasing the length of the support 23. After adjusting to the appropriate length, lock the support 23 in place. When positioned appropriately, the support 23 can provide further support for the first cofferdam plates 1 at both ends. During use, if further support is required for the inner wall of the device, the mounting tube 41 can be fitted onto the outside of the threaded rod 31 and the adjusting tube 26. Then, rotate the two fastening plates 45 on one side of the mounting tube 41. The fastening plates 45 clamp the second support plate 39 on the surface of the third cofferdam plate 11. After clamping the second support plate 39 on the outside, use bolts or other tools to turn it into the second placement hole 40, and then use tools to turn it into the second threaded hole 44 to fix the mounting tube 41.

[0069] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0070] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A cofferdam structure for waterstopping wedge-shaped concrete walls, comprising a first cofferdam plate (1), characterized in that: A first connecting plate (2) is fixed on one side of the first cofferdam plate (1); A second cofferdam plate (3) is movably connected to one side of the first connecting plate (2), a second connecting plate (4) is fixed to one side of the second cofferdam plate (3), and locators (5) are fixed to both sides of the second connecting plate (4). The positioner (5) includes an adjusting block (6), a fixing plate (7) is fixed on one side of the adjusting block (6), a tension spring (8) is fixed on one side of the fixing plate (7), and an adjusting plate (9) is fixed at one end of the tension spring (8). A locking rod (10) is fixed on one side of the adjusting plate (9), and the locking rod (10) passes through the fixing plate (7). The third cofferdam plate (11) is slidably connected to the outside of the second cofferdam plate (3); A third connecting plate (12) is fixed on one side of the third cofferdam plate (11), an adjustment groove (13) is opened on one side of the third cofferdam plate (11), and sliding grooves (14) are opened on both sides of the third cofferdam plate (11). The third cofferdam plate (11) has several positioning holes (15) on the side near the clamp (10); The third cofferdam plate (11) is movably connected to another first cofferdam plate (1) on the side away from the second cofferdam plate (3); The first connecting plate (2), the second connecting plate (4) and the third connecting plate (12) are all provided with first threaded holes (16); A positioning rod (17) is inserted through the first threaded hole (16), and a first threaded tube (18) is threaded to the outer ring of the positioning rod (17). The bottom of the first cofferdam plate (1) is fixed with ground anchors (19). The inner wall of the first cofferdam plate (1) is fixed with a number of first support plates (22), and a support (23) is movably connected between two first support plates (22). The first support plate (22) has a first placement hole (24) on its surface; The support (23) includes a connecting rod (25); An adjusting tube (26) is fixed on one side of the connecting rod (25); Another connecting rod (25) is fixed with a positioning plate (27) on one side, and a bearing (28) is fixed with one side of the positioning plate (27), and a rotating rod (29) is fixed with the inner ring of the bearing (28). One end of the rotating rod (29) is fixed with a movable plate (30), and a threaded rod (31) is fixed on one side of the movable plate (30). The threaded rod (31) is threadedly connected to the inner wall of the regulating tube (26).

2. A cofferdam structure for waterstopping a wedge-shaped concrete wall according to claim 1, characterized in that, The first connecting plate (2) has a reinforcing groove (20) on one side, and the second connecting plate (4) and the third connecting plate (12) are both fixed with reinforcing strips (21) on one side. The reinforcing strip (21) has a rectangular structure and is matched with the reinforcing groove (20).

3. A cofferdam structure for waterstopping a wedge-shaped concrete wall according to claim 1, characterized in that, The positioning plate (27) has several fixing holes (32) on its surface; A telescopic rod (33) is fixed to one side of the movable plate (30), and a mounting plate (34) is fixed to one end of the telescopic rod (33). A spring (35) is sleeved on the outside of the telescopic rod (33); A fixing rod (36) is fixed on one side of the mounting plate (34), and the fixing rod (36) passes through the fixing hole (32).

4. A cofferdam structure for waterstopping a wedge-shaped concrete wall according to claim 1, characterized in that, The bottom of the connecting rod (25) is fixed with an installation rod (37), and the installation rod (37) passes through the first placement hole (24). The bottom of the mounting rod (37) is threadedly connected to a second threaded tube (38).

5. A cofferdam structure for waterstopping a wedge-shaped concrete wall according to claim 1, characterized in that, A number of second support plates (39) are fixed on the inner side of the third cofferdam plate (11), and the surface of the second support plate (39) has a second placement hole (40). An installation tube (41) is movably connected to the outside of the adjustment tube (26), and a hinge (42) is fixed on one side of the installation tube (41). A reinforcing plate (43) is fixed on one side of the mounting tube (41), and a second threaded hole (44) is opened on the surface of the reinforcing plate (43). The second placement hole (40) is coaxial with the second threaded hole (44); The mounting tube (41) is fixed with a fastening plate (45) on the side away from the reinforcing plate (43), and the fastening plate (45) has a third threaded hole (46) on its surface.

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