Pull-and-push pipe joint for lining repair of old pipes

Abstract

The utility model discloses a tow pipe head for old pipeline lining repair, including tow pipe head main part and guide head, the inner wall screw thread cooperation of tow pipe head main part has the threaded rod, and the both ends of threaded rod are fixedly connected with hexagon bolt and taper block respectively, the inside welding of tow pipe head main part has guide rod, and the surface sliding connection of guide rod has guide block, one side surface of guide block is fixedly connected with clamping block, and one side surface of clamping block near taper block is inclined surface. In the utility model, the guide head part is designed as detachable and can replace the taper structure of different angles, greatly improves the adaptability of tow pipe head to different pipeline working conditions, in the complex pipeline environment, the construction personnel can flexibly select the taper head of proper angle according to the actual situation, effectively reduces the crossing resistance, improves the traction efficiency, avoids the construction stagnation and equipment damage caused by the incompatibility of guide head part, significantly shortens the construction period, reduces the construction cost.

Description

Technical Field

[0001] This utility model relates to the field of pipeline repair technology, and in particular to a drag pipe head for repairing the lining of old pipelines. Background Technology

[0002] In the repair of old pipeline linings, the drag pipe head is a key component, and its performance directly affects the efficiency and quality of the repair work. Traditional drag pipe heads have revealed many problems in practical applications. On the one hand, the guide head of the existing towing pipe head is usually a fixed structure, which cannot be flexibly adjusted according to different pipeline conditions. In old pipelines, the pipeline conditions are complex and diverse. For example, in pipelines with a large number of bends, since the angle of the fixed guide head cannot be changed, the guide head is prone to encountering large resistance or even jamming at the bend when pulling the inner lining pipe through, resulting in difficulty in crossing, seriously affecting the construction progress, and may also damage the inner lining pipe and the towing pipe head. On the other hand, in pipelines with more straight pipe sections, the fixed-angle guide head cannot give full play to its advantages in improving traction efficiency and cannot optimize the traction process according to different working conditions.

[0003] On the other hand, insufficient stability is also a common problem when dragging pipe heads pass through old pipelines. Because the inner walls of old pipelines are often corroded, scaled, deformed, etc., and the surface is not smooth, existing dragging pipe heads are prone to shaking, deviation, or even twisting during the passage. This not only increases the friction between the inner liner and the inner wall of the old pipeline, causing wear on the surface of the inner liner and reducing its service life, but may also make the laying position of the inner liner in the old pipeline inaccurate, affecting the repair effect. In addition, even if there are some structures in the existing technology to stabilize dragging pipe heads, they are often quite complex, increasing manufacturing and installation costs and hindering widespread application. In summary, existing drag-type pipe heads have significant shortcomings in terms of guide head adaptability and crossing stability. There is an urgent need for a new type of drag-type pipe head with a simple structure that can effectively solve the above problems in order to meet the growing demand for old pipeline lining repair projects.

[0004] To address these shortcomings, we proposed a drag-type pipe head for repairing the lining of old pipes. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a drag-pull pipe head for repairing the lining of old pipes.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a drag-pull pipe head for repairing the lining of old pipes, comprising a drag-pull pipe head body and a guide head. The inner wall of the drag-pull pipe head body is threaded with a threaded rod, and hexagonal bolts and cone blocks are respectively fixed to both ends of the threaded rod. A guide rod is welded inside the drag-pull pipe head body, and a guide block is slidably connected to the surface of the guide rod. A clamping block is fixed to one side surface of the guide block, and the side surface of the clamping block near the cone block is inclined. A second protective pad and a first protective pad are respectively bonded to the inner wall of the drag-pull pipe head body and the side surface of the clamping block away from the cone block. A guide head is detachably installed at one end of the drag-pull pipe head body through a threaded pipe, and a clearance hole is opened at one end of the guide head corresponding to the position of the hexagonal bolt.

[0007] The outer wall of the main body of the drag tube head is provided with a clearance cavity, and the inner wall of the clearance cavity is connected to a support plate by a spring, and a pulley is installed on the other side surface of the support plate.

[0008] The volume of the relief cavity is larger than the volume of the pulley.

[0009] The diameter of the clearance hole is larger than the diameter of the hexagonal bolt.

[0010] The cone block is used in conjunction with the clamping block.

[0011] The clamping blocks are provided in multiples, and the multiple clamping blocks are arranged in a circular array along the axis of the threaded rod.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. In this utility model, the guide head is designed as a detachable and replaceable conical structure with different angles, which greatly improves the adaptability of the drag pipe head to different pipeline working conditions. In complex pipeline environments, construction personnel can flexibly select the appropriate angle of the conical head according to the actual situation, effectively reduce crossing resistance, improve traction efficiency, avoid construction stagnation and equipment damage caused by mismatch of guide heads, significantly shorten the construction cycle, and reduce construction costs.

[0013] 2. In this utility model, the elastic support component effectively improves the stability of the drag pipe head when passing through old pipes. The combination of spring and roller allows the drag pipe head to automatically adapt to the unevenness of the inner wall of the old pipe, reducing the occurrence of shaking, deviation and torsion. At the same time, the rolling friction of the roller replaces the traditional sliding friction, which greatly reduces the friction between the drag pipe head and the old pipe, reduces the wear on the surface of the inner lining pipe, and ensures the laying quality of the inner lining pipe in the old pipe. This improves the overall effect of the old pipe lining repair and the service life of the inner lining pipe. Moreover, since the spring and roller are standard parts, the installation structure is simple, making the drag pipe head of this utility model have significant advantages in manufacturing cost and installation difficulty, and easier to promote and apply. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of the drag pipe head for repairing the lining of old pipes proposed in this utility model; Figure 2 for Figure 1 A partial structural diagram; Figure 3 A schematic diagram of the pulley, support plate, and spring; Figure 4 A three-dimensional view of the guide head.

[0016] Legend: 1. Main body of the drag tube head; 2. Threaded tube; 3. Guide head; 4. Displacement hole; 5. Hex bolt; 6. Threaded rod; 7. Conical block; 8. Guide rod; 9. Guide block; 10. Clamping block; 11. First protective pad; 12. Second protective pad; 13. Displacement cavity; 14. Pulley; 15. Support plate; 16. Spring. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "joined" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0019] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 A drag-pull pipe head for repairing the lining of old pipes includes a drag-pull pipe head body 1 and a guide head 3. The inner wall of the drag-pull pipe head body 1 is threaded with a threaded rod 6, and the two ends of the threaded rod 6 are respectively fixed with hexagonal bolts 5 and cone blocks 7.

[0020] It is clear that the towing pipe head includes a main body and a guide head 3. The inner wall of the main body is connected to a threaded rod 6 by threads. The two ends of the threaded rod 6 are respectively fixed with hexagonal bolts 5 for operation and cone blocks 7 for transmission.

[0021] The main body 1 of the towing pipe head is welded with a guide rod 8 inside, and a guide block 9 is slidably connected to the surface of the guide rod 8.

[0022] The guide rod 8 welded inside the main body provides a sliding track for the guide block 9, ensuring its stable movement direction.

[0023] A clamping block 10 is fixed to one side surface of the guide block 9, and the side surface of the clamping block 10 near the cone block 7 is inclined.

[0024] The clamping block 10 fixed on the guide block 9 is indicated. Its inclined surface near the cone block 7 is used to cooperate with the cone block 7 to achieve the clamping action.

[0025] The inner wall of the drag tube head body 1 and the side surface of the clamping block 10 away from the cone block 7 are respectively bonded with a second protective pad 12 and a first protective pad 11.

[0026] This indicates that the protective pads on the inner wall of the main body and the clamping block 10 can protect the inner liner tube when clamped.

[0027] One end of the main body 1 of the drag tube head is detachably mounted with a guide head 3 through a threaded tube 2, and a clearance hole 4 is provided at one end of the guide head 3 corresponding to the position of the hexagonal bolt 5.

[0028] The guide head 3 is detachably connected to the main body via the threaded tube 2 for easy replacement, and the clearance hole 4 provides operating space for the hexagonal bolt 5.

[0029] Please refer to Figure 1 The outer wall of the main body 1 of the drag tube head is provided with a relief cavity 13, and the inner wall of the relief cavity 13 is connected to a support plate 15 by a spring 16, and a pulley 14 is installed on the other side surface of the support plate 15.

[0030] The main body has a relief cavity 13 on its outer wall. A support plate 15 is connected to the cavity by a spring 16. A pulley 14 is installed on the support plate 15. The elasticity of the spring 16 allows the pulley 14 to fit against the inner wall of the old pipe, which can stabilize and reduce friction.

[0031] Please refer to Figure 1 The volume of cavity 13 is greater than the volume of pulley 14.

[0032] This ensures that the pulley 14 can retract into the relief cavity 13 when subjected to greater pressure, thus preventing damage.

[0033] Please refer to Figure 1 The diameter of the clearance hole 4 is larger than the diameter of the hex bolt 5.

[0034] Ensure that the hex bolt 5 can enter the clearance hole 4 to facilitate the normal connection between the guide head 3 and the drag tube head 1.

[0035] Please refer to Figure 1 The cone block 7 is used in conjunction with the clamping block 10.

[0036] The cooperative relationship between the cone block 7 and the clamping block 10 is clearly defined. The cone block 7 moves to push the clamping block 10 to clamp the inner liner tube.

[0037] Please refer to Figure 1 Multiple clamping blocks 10 are provided, and the multiple clamping blocks 10 are arranged in a ring array along the axial direction of the threaded rod 6.

[0038] Multiple ring-shaped clamping blocks 10 can clamp the inner liner tube from different directions, making it more secure.

[0039] Working principle: During use, select a guide head 3 with an appropriate angle according to the working conditions of the old pipeline, and install it on the main body of the drag pipe head through the threaded pipe 2; insert the inner liner into the main body 1, and rotate the hexagonal bolt 5 with a tool through the clearance hole 4 of the guide head 3 to drive the threaded rod 6 to rotate, thereby causing the cone block 7 to move. The cone block 7 contacts the inclined surface of the clamping block 10, pushing the clamping block 10 to move inward under the action of the guide rod 8 and the guide block 9. Multiple ring arrays of clamping blocks 10, together with the first protective pad 11 and the second protective pad 12, clamp and fix the inner liner; when passing through the old pipeline, the spring 16 in the clearance cavity 13 of the outer wall of the main body pushes the pulley 14 through the support plate 15, so that the pulley 14 is always in close contact with the inner wall of the pipeline. The spring 16 adapts to the unevenness of the inner wall to reduce shaking, and the rolling of the pulley 14 reduces friction. When encountering a protrusion, the pulley 14 can retract into the clearance cavity 13 to achieve efficient and stable traction operation.

[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A pull-out pipe head for repairing the lining of old pipes, comprising a pull-out pipe head body (1) and a guide head (3), characterized in that, The inner wall of the towing tube head body (1) is threaded with a threaded rod (6), and the two ends of the threaded rod (6) are respectively fixed with a hexagonal bolt (5) and a cone block (7). The inside of the towing tube head body (1) is welded with a guide rod (8), and the surface of the guide rod (8) is slidably connected with a guide block (9). A clamping block (10) is fixed to one side of the guide block (9), and the side surface of the clamping block (10) near the cone block (7) is inclined. The inner wall of the towing tube head body (1) and the side surface of the clamping block (10) away from the cone block (7) are respectively bonded with a second protective pad (12) and a first protective pad (11). One end of the towing tube head body (1) is detachably installed with a guide head (3) through a threaded tube (2), and a clearance hole (4) is opened at one end of the guide head (3) corresponding to the position of the hexagonal bolt (5).

2. The drag-type pipe head for repairing the lining of old pipes according to claim 1, characterized in that, The outer wall of the main body (1) of the drag tube head is provided with a relief cavity (13), and the inner wall of the relief cavity (13) is connected to a support plate (15) by a spring (16), and a pulley (14) is installed on the other side surface of the support plate (15).

3. The drag-type pipe head for repairing the lining of old pipes according to claim 2, characterized in that, The volume of the relief cavity (13) is greater than the volume of the pulley (14).

4. The drag-type pipe head for repairing the lining of old pipes according to claim 1, characterized in that, The diameter of the clearance hole (4) is larger than the diameter of the hexagonal bolt (5).

5. The drag-type pipe head for repairing the lining of old pipes according to claim 1, characterized in that, The cone block (7) is used in conjunction with the clamping block (10).

6. The drag-type pipe head for repairing the lining of old pipes according to claim 1, characterized in that, The clamping blocks (10) are provided in multiples, and the multiple clamping blocks (10) are arranged in a ring array along the axial direction of the threaded rod (6).

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