An expansion-lock type polyethylene micro jacking pipe

Abstract

This utility model discloses an expansion-locking polyethylene micro-jacking pipe, including a pipe body; its characteristic is that it also includes a joint made of cast iron, a partition set on the joint, a spigot end set on the joint and inclined on both sides of the partition, a socket end set at the pipe end and adapted to the spigot end, and limiting stops set on both sides of the upper part of the partition to limit and block the pipe body. This utility model, by using a cast iron joint, connects adjacent pipe bodies through the cast iron joint. Due to the higher strength of cast iron, the wall thickness of the cast iron spigot only needs to occupy 1 / 6 to 1 / 4 of the total wall thickness, while the plastic socket can retain a larger wall thickness, ensuring strong pressure resistance at the connection between the pipe body and the joint. During use, the connection will not deform due to pressure, thus preventing leakage at the connection due to deformation and improving the sealing performance of the connection.

Description

Technical Field

[0001] This utility model relates to jacking pipes, specifically an expansion-locking polyethylene micro jacking pipe. Background Technology

[0002] In the existing technology, the connection between plastic jacking pipes is usually achieved by opening socket structures at both ends of the jacking pipe or by using joints. When connecting by socket structures, a spigot needs to be opened at one end of the pipe body and a socket needs to be opened at the other end. The connection is made by inserting and mating the spigot and the socket. However, because the pipe wall itself is thin, opening spigots and sockets will make the pipe wall even thinner, which makes it easy to break under pressure.

[0003] In practical use, whether the pipes are directly connected or connected by joints, uneven external pressure can easily cause deformation of the pipes and joints. Once deformation occurs, it can easily lead to damage to the joints or gaps in the joints, causing leakage. To address this, an expansion-locking polyethylene micro-jacking pipe is proposed. Utility Model Content

[0004] The purpose of this invention is to solve the above problems by proposing an expansion-locking polyethylene micro-jacking pipe.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an expansion-locking polyethylene micro-jacking pipe, comprising a pipe body; characterized in that it further comprises a joint made of cast iron, a partition disposed on the joint, an inlet end disposed on the joint and inclined on both sides of the partition, a socket end disposed at the pipe end and adapted to the inlet end, and a limiting stop disposed on both sides of the upper part of the partition to limit and block the pipe body.

[0006] More preferably, it also includes at least one limiting groove disposed on the insertion end and at least one locking tooth disposed on the socket end that is adapted to the limiting groove.

[0007] In a further preferred embodiment, an inclined surface is provided between adjacent limiting slots to serve as a guide.

[0008] A further preferred embodiment includes a slot provided at the end of the tube body that is compatible with the limiting stop.

[0009] In a further preferred embodiment, the socket end and the spigot end are connected by an interference fit.

[0010] A further preferred embodiment includes a water-swellable polyurethane adhesive layer applied to the connection between the joint and the end of the pipe.

[0011] A further preferred embodiment includes a sealing ring groove disposed on the connector at the connection point between the two sides of the partition and the end of the pipe body.

[0012] The beneficial effects of this utility model are as follows: By using a joint made of cast iron, adjacent pipes are connected through the cast iron joint. Due to the higher strength of cast iron, the wall thickness of the cast iron socket only needs to account for 1 / 6 to 1 / 4 of the total wall thickness, while the plastic socket can retain a larger wall thickness. This ensures strong pressure resistance at the connection between the pipe and the joint, and prevents deformation of the connection due to pressure during use. Consequently, it prevents leakage at the connection between the pipe and the joint due to deformation, thus improving the sealing performance of the connection.

[0013] By setting limiting stops on both sides of the upper part of the partition, the limiting stops form a blockage on the outer side of the pipe end. When the pipe is under pressure, the limiting stops block it, ensuring that the pipe end will not deform after being under pressure. This ensures that the pipe and the partition are in contact and will not lift up, thus affecting the sealing performance.

[0014] By setting the spigot end at an angle, the socket end of the pipe body and the spigot end are pressed together along the inclined surface when connected, forming an interference fit. Combined with the setting of retaining teeth and limiting grooves, the connection between the pipe body and the connector is enhanced, and at the same time, it plays a role in preventing detachment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a cross-sectional structural schematic diagram of the present invention;

[0017] Figure 3 This is a partial cross-sectional structural diagram of the tube body in this utility model;

[0018] Figure 4 This is a partial cross-sectional structural diagram of the connector in this utility model;

[0019] Figure 5 This is a schematic diagram of another embodiment of the connector in this utility model;

[0020] Figure 6 This is a schematic diagram of the connection between the connector and the pipe body in another embodiment of this utility model.

[0021] Legend: 1. Pipe body; 2. Connector; 21. Barrier; 22. Socket end; 23. Limiting stop; 3. Socket end; 4. Limiting groove; 5. Clamping tooth; 51. Bevel; 6. Hollow groove; 7. Sealing ring groove. Detailed Implementation

[0022] The following description, in conjunction with the accompanying drawings, further illustrates the expansion-locking polyethylene micro-jacking pipe of this utility model.

[0023] It should be noted that all directional indicators such as up, down, left, right, front, back, etc. in the embodiments of this utility model are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicator will also change accordingly.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly; for example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can also mean a mechanical connection, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] See Figures 1-6 As shown, an expansion-locking polyethylene micro-jacking pipe includes a pipe body 1; characterized in that it also includes a joint 2 made of cast iron, a partition 21 disposed on the joint 2, a spigot end 22 disposed on the joint 2 and inclined on both sides of the partition 21, a socket end 3 disposed at the pipe end and adapted to the spigot end 22, and a limiting stop 23 disposed on both sides of the upper part of the partition 21 to limit and block the pipe body 1; the socket end 3 and the spigot end 22 are connected by an interference fit;

[0026] By using cast iron connectors, adjacent pipes are connected through cast iron connectors. Due to the higher strength of cast iron, the wall thickness of the cast iron spigot only needs to account for 1 / 6 to 1 / 4 of the total wall thickness, while the plastic socket can retain a larger wall thickness. This ensures strong pressure resistance at the connection between the pipe and the connector, preventing deformation of the connection due to pressure during use, and thus preventing leakage at the connection due to deformation, thereby improving the sealing performance of the connection.

[0027] By setting limiting stops 23 on both sides of the upper part of the partition 21, the limiting stops 23 form a block on the outer side of the pipe end. When the pipe 1 is under pressure, the limiting stops 21 form a block, ensuring that the end of the pipe 1 will not deform after being under pressure. This ensures that the pipe 1 and the partition 21 are in contact and will not lift up and leak, affecting the sealing and connection stability.

[0028] When the tube body 1 is compressed, it will deform first. If the jacking force is large, the material at the slot 6 position will continue to be squeezed. At this time, all the material at the end face of the tube body 1 will be completely attached to the partition 21 and the limiting stop 23. The force on the spigot end 22 is first in the middle and then inside and outside, and the force on the spigot is more uniform, preventing the limiting stop 23 from deforming in the early stage of construction due to the large jacking angle.

[0029] In one embodiment, it further includes at least one limiting groove 4 disposed on the socket end 22 and at least one locking tooth 5 disposed on the socket end 3 and adapted to the limiting groove 4;

[0030] By setting the spigot end 22 at an angle, the socket end 3 of the tube body 1 and the spigot end 22 are pressed together along the inclined surface 51 when connected, forming an interference fit. Combined with the setting of the retaining teeth 5 and the limiting groove 4, the connection between the tube body 1 and the connector 2 is enhanced, and at the same time, it plays a role in preventing detachment.

[0031] In one embodiment, a guide slope 51 is provided between adjacent limiting slots 4. With the setting of the slope 51, after the insertion end 22 is inserted into the socket end 3, when the locking tooth 5 moves into the limiting slot 4 and continues to move, the locking tooth 5 moves along the slope 51 and expands outward until the locking tooth 5 moves to another limiting slot 4 and then the locking tooth 5 is locked in the limiting slot 4.

[0032] In one embodiment, a slot 6 is provided at the end of the tube body 1 and adapted to the limiting stop 23. The slot 6 allows the limiting stop 23 to be locked in the slot 6.

[0033] In one embodiment, a water-swellable polyurethane adhesive is applied to the connection between the connector 2 and the end of the tube 1. When the tube 1 and the connector 2 are connected, the water-swellable polyurethane adhesive can be applied to the tube 1 and the connector 2 to form a sealant layer. The sealant layer expands after contact with water, which can further enhance the sealing performance.

[0034] In one embodiment, a sealing ring groove 7 is provided on the connector 2 at the connection between the two sides of the partition 21 and the end of the pipe body 1. A sealing ring can be installed in the sealing ring groove 7 or a sealing boss adapted to the sealing ring groove 7 can be provided at the end of the pipe body 1 to enhance the sealing performance at the connection between the connector 2 and the pipe body 1.

[0035] When using this utility model: First, apply polyurethane rainwater expansion adhesive to the pipe body 1. Then, insert the plug end 22 of one end of the connector 2 into the socket end 3 of one end of the pipe body 1. Then, continue to push the connector 2. During the pushing process, the connector 2 forms an outward squeeze by the inclined surface of the socket end 3 of the connector 2. During the continuous pushing process, the first locking tooth 5 set on the socket end 3 is locked in the first limiting groove 4. During the continuous movement, the locking tooth 5 continues to expand outward along the inclined surface 51. After moving to another limiting groove 4, the locking tooth 5 is locked in the limiting groove 4 until the end of the pipe body 1 is attached to one side of the partition 21. At this time, the connector 2 and the pipe body 1 are initially connected. When repairing or replacing the pipe body 1 in the future, simply insert the pipe body 1 with the connector 2 into the pipe groove and insert the connector 2 into another pipe body 1 to complete the connection of the pipe body 1.

[0036] The scope of protection of this utility model is not limited to the above embodiments and their variations. Conventional modifications and substitutions made by those skilled in the art based on the content of these embodiments are all within the scope of protection of this utility model.

Claims

1. An expansion-locking polyethylene micro-jacking pipe, comprising a pipe body (1); characterized in that... It also includes a joint (2) made of cast iron, a partition (21) set on the joint (2), a spigot end (22) set on the joint (2) and inclined on both sides of the partition (21), a socket end (3) set at the end of the pipe and adapted to the spigot end (22), and a limiting stop (23) set on both sides of the upper part of the partition (21) to limit and block the pipe body (1).

2. The expansion-locking polyethylene micro-jacking pipe according to claim 1, characterized in that: It also includes at least one limiting groove (4) provided on the socket end (22) and at least one locking tooth (5) provided on the socket end (3) that is adapted to the limiting groove (4).

3. The expansion-locking polyethylene micro-jacking pipe according to claim 2, characterized in that: An inclined surface (51) is provided between adjacent limiting slots (4) to serve as a guide.

4. The expansion-locking polyethylene micro-jacking pipe according to claim 1, characterized in that: It also includes a slot (6) provided at the end of the tube (1) that is adapted to the limiting stop (23).

5. The expansion-locking polyethylene micro-jacking pipe according to claim 1, characterized in that: The socket end (3) and the spigot end (22) are connected by an interference fit.

6. The expansion-locking polyethylene micro-jacking pipe according to claim 1, characterized in that: It also includes a water-swellable polyurethane adhesive layer applied to the connection between the joint (2) and the end of the pipe (1).

7. The expansion-locking polyethylene micro-jacking pipe according to claim 1, characterized in that: It also includes a sealing ring groove (7) set on the connector (2) at the connection between the two sides of the partition (21) and the end of the pipe body (1).

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