Water conservancy pipeline laying traction machine

Abstract

The utility model belongs to the technical field of pipeline laying equipment, and particularly relates to a water conservancy pipeline laying tractor which is characterized in that a connecting seat is fixedly arranged above a base, a guide plate is hinged to one side of the connecting seat, and a lifting part is arranged between the bottom surface of the guide plate and the top surface of the base; the buffering assemblies are symmetrically arranged on the two sides of the guide plate, and each buffering assembly comprises moving grooves symmetrically formed in the guide plate, moving blocks are arranged in the moving grooves in a sliding mode, baffles are arranged on the side edges of the moving blocks, overturning structures are arranged between the baffles and the moving blocks, and damping structures are arranged in the moving grooves and connected with the moving blocks. The fixing assembly is arranged between the overturning structure and the moving block and used for limiting rotation of the baffle. And limitation on the baffle can be automatically relieved, so that the baffle can be overturned along with the overturning structure, the pipeline moves along the guide plate, and an operator can be prevented from being injured.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline laying equipment, and particularly relates to a traction machine for laying water conservancy pipelines. Background Technique

[0002] Hydraulic engineering mainly studies the basic knowledge and skills in aspects such as engineering hydrology, hydraulic engineering survey, hydraulic reinforced concrete, hydraulic structures, engineering drawing, etc. In the field of hydraulic engineering, engineering planning and design, on-site construction, engineering budget, and maintenance of hydraulic equipment are carried out. In hydraulic engineering, pipelines often need to be laid, and a traction machine is often used to tow water conservancy pipelines during pipeline laying.

[0003] Chinese utility model patent CN213036992U discloses a traction device for laying water conservancy pipelines, including: a bottom plate, two sides of the top of the bottom plate are respectively fixedly connected with a first connecting column and a second connecting column, the top of the first connecting column and the second connecting column is fixedly connected with a traction plate, a first moving groove and a second moving groove are respectively opened at the front end and the rear end of the top of the traction plate, a limiting rod is fixedly connected to the inner cavity of the first moving groove, and a limiting column is slidably connected to the surface of the limiting rod.

[0004] However, during unloading, when the operator opens the baffle through the handle and the water conservancy pipeline rolls onto the rubber block, under the influence of the gravity of the water conservancy pipeline, the baffle will quickly rotate along the hinged position, easily causing injury to the operator. Content of the Utility Model

[0005] The purpose of the utility model is to provide a traction machine for laying water conservancy pipelines in view of the above-mentioned existing technical problems, so as to solve the problems put forward in the background technique.

[0006] In view of this, the utility model provides a traction machine for laying water conservancy pipelines, including:

[0007] A base, a connecting seat is fixedly arranged above the base, a guiding plate is hinged on one side of the connecting seat, and a lifting part is arranged between the bottom surface of the guiding plate and the top surface of the base;

[0008] A buffer assembly, the buffer assembly is symmetrically arranged on both sides of the guiding plate, and the buffer assembly includes:

[0009] Moving grooves, the moving grooves are symmetrically arranged on the guiding plate, and moving blocks are slidably arranged in the moving grooves,

[0010] Baffles, the baffles are arranged on the sides of the moving blocks, and a flipping structure is arranged between the baffles and the moving blocks,

[0011] A damping structure, the damping structure is arranged in the moving grooves and is connected to the moving blocks;

[0012] A fixing component, which is arranged between the flipping structure and the moving block to limit the rotation of the baffle.

[0013] In this technical solution, the lifting part can drive the guiding plate to rotate along the connecting seat, so that the guiding plate is inclined. When unloading the pipeline, the pipeline can move along the guiding plate. Through the arranged buffer component, moving groove, moving block, baffle, damping structure and flipping structure, the pipeline can be prevented from being damaged when unloaded. And through the cooperation between the flipping structure and the fixing structure, when the baffle moves to the bottom end of the moving groove, the restriction on the baffle can be automatically released, so that the baffle can flip along with the flipping structure, and the pipeline can move along the guiding plate, which can avoid the operator from being injured.

[0014] In the above technical solution, further, the flipping structure includes:

[0015] A fixed shaft, which is fixedly arranged on the side of the moving block, and the bottom of the baffle is rotatably arranged on the fixed shaft;

[0016] A torsion spring, which is sleeved on the fixed shaft and abuts against the surface of the baffle;

[0017] A limiting block, which is fixedly arranged on the side of the moving block, and a limiting groove is arranged on the side of the baffle close to the moving plate.

[0018] In this technical solution, through the cooperation between the limiting block, the limiting groove and the torsion spring, the baffle can be driven to rotate along the fixed shaft, and after the fixing component releases the restriction on the baffle, the baffle can be driven to automatically rotate and reset.

[0019] In the above technical solution, further, the fixing component includes:

[0020] A cavity, which is arranged inside the moving block, and a push rod is arranged along the length direction of the guiding plate, and the push rod penetrates through the moving block;

[0021] A fixed block, which is fixedly arranged on the back of the guiding plate and is arranged below the moving path of the moving block;

[0022] A limiting structure, which is arranged between the push rod and the baffle to limit the rotation of the baffle;

[0023] Wherein, when the moving block moves downward, the fixed block can push the push rod.

[0024] In this technical solution, due to the gravity of the pipeline itself, the baffle drives the moving block to move downward along the moving groove, so that the end face of the push rod contacts the fixed block and pushes the push rod to move inward, driving the limiting structure to release the restriction on the baffle, which avoids the need for manual operation when unloading the pipeline and is beneficial to improving the safety of operation.

[0025] In the above technical solution, further, the limiting structure includes:

[0026] A boss, which is arranged on the outer wall of the push rod and is located inside the cavity;

[0027] A fixed rod, which is fixedly arranged on the outer wall of the push rod, and the axis of the fixed rod is perpendicular to the axis of the push rod;

[0028] A cross plate, which is arranged inside the cavity and is located between the push rod and the baffle;

[0029] A guide plate, which is fixedly arranged on the back of the cross plate, and a guide groove is obliquely arranged on the guide plate, and the fixed rod is slidably arranged in the guide groove;

[0030] A limiting rod, which is fixedly arranged on the other side of the cross plate and penetrates through the side wall of the cavity;

[0031] A limiting hole, which is arranged at the lower end of the baffle, and the limiting rod can be inserted into the limiting hole;

[0032] Wherein, a first spring is sleeved on the push rod.

[0033] In this technical solution, when the baffle moves downward along with the gravity of the pipeline, through the fixedly arranged fixed block, the push rod can be pushed to move, and during the movement of the push rod, through the cooperation among the fixed rod, the guide plate and the guide groove, the cross plate is driven to retract, so that the limiting rod is separated from the limiting hole, achieving the release of the limiting relationship between the moving block and the baffle, and through the cooperation between the arranged first spring and the boss, the push rod can be driven to reset, so as to limit the baffle again, which is beneficial to improving the efficiency of pipeline traction.

[0034] In the above technical solution, further, the damping structure includes:

[0035] A smooth rod, which is arranged in the moving groove, penetrates through the moving block and is slidably connected with the moving block;

[0036] A second spring, which is sleeved on the smooth rod.

[0037] In this technical solution, when the pipeline is towed, through the cooperation between the arranged second spring and the smooth rod, the impact force exerted by the pipeline on the baffle can be absorbed, so that the pipeline can be smoothly unloaded through the device, which is beneficial to improving the efficiency of pipeline traction.

[0038] In the above technical solution, further, a limiting structure is hinged to the end face of the guide plate far away from the connecting seat, and the limiting structure includes:

[0039] A limiting plate, one end face of which is hinged to a guiding plate, and a groove is formed in the end face of the limiting plate away from the hinged end;

[0040] Connecting pieces, which are symmetrically arranged on the bottom surface of the limiting plate, and a through hole is formed between the connecting pieces and the groove;

[0041] A lifting rod, which penetrates through the connecting piece, and the connecting piece and the lifting rod are threadedly connected;

[0042] Wherein, a top block is arranged at the top of the lifting rod, and a handle is arranged at the other end.

[0043] In this technical solution, by matching the groove with the vehicle and rotating the handle by the operator, the lifting rod and the top block move upward, so as to fix the device and avoid the device from moving during pipeline traction, resulting in injury to the operator.

[0044] In the above technical solution, further, bevels are arranged on the top surface of the limiting hole and the end face of the limiting rod.

[0045] In this technical solution, the bevels arranged facilitate the limiting rod to extend out and be stuck into the limiting hole, which is beneficial to improving the working stability of the device.

[0046] The beneficial effects of the present utility model are:

[0047] 1. Through the cooperation between the flipping structure and the fixing structure, when the baffle moves to the bottom end of the moving groove, the restriction on the baffle can be automatically released, so that the baffle can flip along with the flipping structure, and the pipeline can move along the guiding plate, which can avoid injury to the operator.

[0048] 2. Through the cooperation between the fixed rod, the guiding plate and the guiding groove, the cross plate is driven to retract, so that the limiting rod and the limiting hole are separated, achieving the release of the limiting relationship between the moving block and the baffle, and through the cooperation between the first spring and the convex platform, the push rod can be driven to reset, so as to re-limit the baffle, which is beneficial to improving the efficiency of pipeline traction. Description of the Drawings

[0049] Figure 1 is a three-dimensional schematic diagram of the present utility model;

[0050] Figure 2 is a three-dimensional schematic diagram of another perspective of the present utility model;

[0051] Figure 3 is an exploded view of the buffer assembly of the present utility model;

[0052] Figure 4 is the present utility model Figure 2 enlarged view of area A;

[0053] Figure 5 is an enlarged view of area B in the present utility model Figure 3 ;

[0054] The markings in the figure are indicated as follows:

[0055] 1. Base; 2. Connecting seat; 3. Guide plate; 4. Lifting part; 5. Buffer assembly; 501. Moving groove; 502. Moving block; 503. Baffle; 6. Flipping structure; 601. Fixed shaft; 602. Torsion spring; 603. Limiting block; 604. Limiting groove; 7. Fixing assembly; 701. Cavity; 702. Push rod; 703. Fixed block; 8. Limiting structure; 801. Boss; 802. Fixed rod; 803. Horizontal plate; 804. Guide plate; 805. Guide groove; 806. Limiting rod; 807. Limiting hole; 808. First spring; 9. Damping structure; 901. Smooth rod; 902. Second spring; 10. Limiting structure; 1001. Limiting plate; 1002. Groove; 1003. Connecting piece; 1004. Lifting rod; 1005. Top block; 1006. Handle. Detailed implementation manners

[0056] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0057] In the description of the present application, it should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary embodiments according to the present application. For the convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technologies, methods, and devices should be regarded as a part of the authorization specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0058] It should be noted that the terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of this application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are usually of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / ", generally indicates an "or" relationship between the associated objects before and after.

[0059] It should be noted that in the description of this application, the orientation or positional relationships indicated by the orientation terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description. Without contrary explanations, these orientation terms do not indicate and imply that the devices or elements referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the protection scope of this application; the terms "inside, outside" refer to the inside and outside relative to the outline of each component itself.

[0060] It should be noted that in this application, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitations, the element defined by the statement "including one..." does not exclude the existence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of this application is not limited to performing functions in the order shown or discussed. It may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0061] Embodiment 1:

[0062] by Figures 1-5As shown in the figure, this embodiment provides a traction machine for laying water conservancy pipelines, including: a base 1, a connecting seat 2 is fixedly arranged above the base 1, a guiding plate 3 is hinged on one side of the connecting seat 2, and a lifting part 4 is arranged between the bottom surface of the guiding plate 3 and the top surface of the base 1; a buffer assembly 5, the buffer assembly 5 is symmetrically arranged on both sides of the guiding plate 3, and the buffer assembly 5 includes: moving grooves 501, the moving grooves 501 are symmetrically arranged on the guiding plate 3, and moving blocks 502 are slidably arranged in the moving grooves 501, a baffle 503, the baffle 503 is arranged on the side of the moving block 502, and a flipping structure 6 is arranged between the baffle 503 and the moving block 502, a damping structure 9, the damping structure 9 is arranged in the moving groove 501 and is connected with the moving block 502; a fixing assembly 7, the fixing assembly 7 is arranged between the flipping structure 6 and the moving block 502 to limit the rotation of the baffle 503.

[0063] The lifting part 4 can drive the guiding plate 3 to rotate along the connecting seat 2, so that the guiding plate 3 is inclined. When unloading the pipeline, the pipeline can move along the guiding plate 3. By setting the buffer assembly 5, and through the cooperation among the moving groove 501, the moving block 502, the baffle 503, the damping structure 9 and the flipping structure 6, the breakage of the pipeline during unloading can be avoided. And through the cooperation between the flipping structure 6 and the fixing structure, when the baffle 503 moves to the bottom end of the moving groove 501, the restriction on the baffle 503 can be automatically released, so that the baffle 503 can flip along with the flipping structure 6, and the pipeline can move along the guiding plate 3, which can avoid the injury of the operator.

[0064] Furthermore, the flipping structure 6 includes: a fixed shaft 601, the fixed shaft 601 is fixedly arranged on the side surface of the moving block 502, and the bottom of the baffle 503 is rotatably arranged on the fixed shaft 601; a torsion spring 602, the torsion spring 602 is sleeved on the fixed shaft 601 and abuts against the surface of the baffle 503; a limiting block 603, the limiting block 603 is fixedly arranged on the side surface of the moving block 502, and a limiting groove 604 is opened on the side of the baffle 503 close to the moving plate.

[0065] Through the cooperation among the limiting block 603, the limiting groove 604 and the torsion spring 602, the baffle 503 can be driven to rotate along the fixed shaft 601, and after the fixing assembly 7 releases the restriction on the baffle 503, the baffle 503 can be driven to automatically rotate and reset.

[0066] Further, the fixing component 7 includes: a cavity 701 disposed inside the moving block 502 and a push rod 702 disposed along the length direction of the guiding plate 3, the push rod 702 penetrating through the moving block 502; a fixing block 703 fixedly disposed on the back surface of the guiding plate 3 and below the moving path of the moving block 502; a limiting structure 8 disposed between the push rod 702 and the baffle 503 for restricting the rotation of the baffle 503; wherein, when the moving block 502 moves downward, the fixing block 703 can push the push rod 702.

[0067] Due to the gravity of the pipeline itself, the baffle 503 drives the moving block 502 to move downward along the moving groove 501, so that the end face of the push rod 702 contacts the fixing block 703 and pushes the push rod 702 to move inward, driving the limiting structure 8 to release the restriction on the baffle 503, avoiding the need for manual operation when removing the pipeline, and being beneficial to improving the safety of the operation.

[0068] Embodiment 2:

[0069] As Figures 1-5 shown, this embodiment provides a traction machine for laying water conservancy pipelines. In addition to including the technical solutions of the above embodiment, it also has the following technical features.

[0070] Further, the limiting structure 8 includes: a boss 801 disposed on the outer wall of the push rod 702 and inside the cavity 701; a fixing rod 802 fixedly disposed on the outer wall of the push rod 702, and the axis of the fixing rod 802 is perpendicular to the axis of the push rod 702; a cross plate 803 disposed inside the cavity 701 and between the push rod 702 and the baffle 503; a guiding plate 804 fixedly disposed on the back surface of the cross plate 803, and a guiding groove 805 is inclinedly disposed on the guiding plate 804, the fixing rod 802 is slidably disposed in the guiding groove 805; a limiting rod 806 fixedly disposed on the other side of the cross plate 803 and penetrating through the side wall of the cavity 701; a limiting hole 807 disposed at the lower end of the baffle 503, and the limiting rod 806 can be inserted into the limiting hole 807; wherein, a first spring 808 is sleeved on the push rod 702.

[0071] When the baffle 503 moves downward along with the gravity of the pipeline, the fixed block 703 which is fixedly arranged can push the push rod 702 to move. During the movement of the push rod 702, through the cooperation among the fixed rod 802, the guide plate 804 and the guide groove 805, the cross plate 803 is driven to retract, so that the limiting rod 806 is separated from the limiting hole 807, achieving the release of the limiting relationship between the moving block 502 and the baffle 503. And through the cooperation between the first spring 808 and the boss 801 which are arranged, the push rod 702 can be driven to reset, so as to restrict the baffle 503 again, which is beneficial to improving the efficiency of pipeline traction.

[0072] Further, the damping structure 9 includes: a polished rod 901 which is arranged in the moving groove 501, penetrates through the moving block 502 and is slidably connected with the moving block 502; and a second spring 902 which is sleeved on the polished rod 901.

[0073] When the pipeline is towed, through the cooperation between the second spring 902 and the polished rod 901 which are arranged, the impact force exerted by the pipeline on the baffle 503 can be absorbed, so that the pipeline can pass through the device smoothly, which is beneficial to improving the efficiency of pipeline traction.

[0074] Further, a limiting structure 10 is hingedly arranged on the end face of the guiding plate 3 away from the connecting seat 2. The limiting structure 10 includes: a limiting plate 1001, one end face of which is hingedly connected with the guiding plate 3, and a groove 1002 is formed on the end face of the limiting plate 1001 away from the hinge; connecting pieces 1003 which are symmetrically arranged on the bottom surface of the limiting plate 1001, and a through hole is formed through the connecting pieces 1003 and the groove 1002; a lifting rod 1004 which penetrates through the connecting pieces 1003 and is threadedly connected with the connecting pieces 1003; wherein, a top block 1005 is arranged at the top of the lifting rod 1004, and a handle 1006 is arranged at the other end.

[0075] By matching the groove 1002 with the vehicle and rotating the handle 1006 by the operator, the lifting rod 1004 and the top block 1005 move upward, so as to fix the device and avoid the device moving during pipeline traction, which may cause injury to the operator.

[0076] Further, bevels are arranged on the top surface of the limiting groove 604 and the end face of the limiting rod 806.

[0077] The bevels arranged can facilitate the limiting rod 806 to extend out and be clamped into the limiting hole 807, which is beneficial to improving the working stability of the device.

[0078] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above specific implementation manners. The above specific implementation manners are merely illustrative rather than restrictive. Those of ordinary skill in the art, under the inspiration of the present application and without departing from the spirit of the present application and the scope protected by the claims, can also make many forms, all of which fall within the protection scope of the present application.

Claims

1. A traction machine for laying water conservancy pipelines, characterized in that , including: A base (1), a connecting seat (2) is fixedly arranged above the base (1), a guiding plate (3) is hinged on one side of the connecting seat (2), and a lifting part (4) is arranged between the bottom surface of the guiding plate (3) and the top surface of the base (1); A buffer assembly (5), the buffer assembly (5) is symmetrically arranged on both sides of the guiding plate (3), and the buffer assembly (5) includes: Moving grooves (501), the moving grooves (501) are symmetrically arranged on the guiding plate (3), and moving blocks (502) are slidably arranged in the moving grooves (501), Baffles (503), the baffles (503) are arranged on the sides of the moving blocks (502), and a flipping structure (6) is arranged between the baffles (503) and the moving blocks (502), A damping structure (9), the damping structure (9) is arranged in the moving grooves (501) and is connected to the moving blocks (502); A fixing assembly (7), the fixing assembly (7) is arranged between the flipping structure (6) and the moving blocks (502) to limit the rotation of the baffles (503).

2. The traction machine for laying water conservancy pipelines according to claim 1, wherein The flipping structure (6) includes: A fixing shaft (601), the fixing shaft (601) is fixedly arranged on the side surface of the moving block (502), and the bottom of the baffle (503) is rotatably arranged on the fixing shaft (601); A torsion spring (602), the torsion spring (602) is sleeved on the fixing shaft (601) and abuts against the surface of the baffle (503); A limiting block (603), the limiting block (603) is fixedly arranged on the side surface of the moving block (502), and a limiting groove (604) is formed on the baffle (503) close to the moving plate side.

3. A water conservancy pipeline laying tractor according to claim 1, characterized in that, The fixing assembly (7) includes: A cavity (701), the cavity (701) is arranged inside the moving block (502), and a push rod (702) is arranged along the length direction of the guiding plate (3), and the push rod (702) penetrates through the moving block (502); A fixing block (703), the fixing block (703) is fixedly arranged on the back surface of the guiding plate (3) and is arranged below the moving path of the moving block (502); A limiting structure (8), the limiting structure (8) is arranged between the push rod (702) and the baffle (503) to limit the rotation of the baffle (503); Wherein, when the moving block (502) moves downward, the fixing block (703) can push the push rod (702).

4. A water conservancy pipeline laying tractor according to claim 3, characterized in that, The limiting structure (8) includes: A boss (801), the boss (801) is arranged on the outer wall of the push rod (702) and is located inside the cavity (701); A fixing rod (802), the fixing rod (802) is fixedly arranged on the outer wall of the push rod (702), and the axis of the fixing rod (802) is perpendicular to the axis of the push rod (702); A cross plate (803), the cross plate (803) is arranged inside the cavity (701) and is located between the push rod (702) and the baffle (503); A guiding plate (804), the guiding plate (804) is fixedly arranged on the back surface of the cross plate (803), and a guiding groove (805) is inclinedly arranged on the guiding plate (804), and the fixing rod (802) is slidably arranged in the guiding groove (805); A limiting rod (806) is fixedly arranged on the other side of the cross plate (803) and penetrates through the side wall of the cavity (701); A limiting hole (807) is arranged at the lower end of the baffle plate (503), and the limiting rod (806) can be inserted into the limiting hole (807); Wherein, a first spring (808) is sleeved on the push rod (702).

5. A water conservancy pipeline laying tractor according to claim 1, characterized in that, The damping structure (9) includes: A smooth rod (901) is arranged in the moving groove (501), the smooth rod (901) penetrates through the moving block (502), and is slidably connected with the moving block (502); A second spring (902) is sleeved on the smooth rod (901).

6. The traction machine for laying water conservancy pipelines according to claim 1, wherein, A limiting structure (10) is hingedly arranged on the end face of the guiding plate (3) far away from the connecting seat (2), and the limiting structure (10) includes: A limiting plate (1001), one end face of the limiting plate (1001) is hingedly connected with the guiding plate (3), and a groove (1002) is formed on the end face of the limiting plate (1001) far away from the hinge; Connectors (1003) are symmetrically arranged on the bottom surface of the limiting plate (1001), and a through hole is arranged through the connectors (1003) and the groove (1002); A lifting rod (1004) penetrates through the connectors (1003), and the connectors (1003) are threadedly connected with the lifting rod (1004); Wherein, a top block (1005) is arranged at the top of the lifting rod (1004), and a handle (1006) is arranged at the other end.

7. The tractor for laying water conservancy pipelines according to claim 4, characterized in that, Bevel angles are arranged on the top surface of the limiting hole (807) and the end face of the limiting rod (806).

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