Novel plastic pipeline structure adopting trenchless process to replace original pipeline

Abstract

The novel plastic pipeline comprises a pipeline body, and the outer wall of one end of the pipeline body is provided with an outer wall lock catch step and a sealing ring groove. An inner wall lock catch step is arranged on the inner wall of the other end of the pipeline body. After socket connection and installation, the lock catch steps of the outer wall and the inner wall of the pipeline are meshed with each other, and the sealing ring sleeved with the sealing ring groove in the outer wall of the pipeline is tightly attached to the inner wall of the pipeline, so that a good sealing effect is achieved. And the length of the pipeline main body is generally 400 to 1000 mm. The scheme has the characteristics of simplicity and high efficiency in construction, no damage to original facilities, remarkable economic benefits and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of municipal engineering construction, and particularly to a novel plastic pipe structure for replacing an original pipe by a trenchless process. Background Art

[0002] In today's society, due to the long service life of drainage and sewage pipes in municipal engineering and the uneven local stress of the soil layer structure, the underground drainage and sewage pipes are cracked and leaked, or even collapsed and blocked. If not repaired in time, the upstream underground drainage and sewage will overflow, affecting the use.

[0003] The existing local trenchless repair technologies for drainage and sewage pipes have been widely used in the repair of drainage and sewage pipes. Currently, the more common local trenchless repair processes for drainage and sewage pipes mainly include three repair processes: local resin curing, stainless steel foam cylinder, and double expansion ring. However, each of the above processes has its limitations: for example, the double expansion ring repair is only applicable to the repair of large-diameter pipes; while the stainless steel foam cylinder mainly relies on the foaming agent to foam to generate a seal, and the foaming effect cannot be effectively controlled, and some pipes still leak after repair; for local resin curing, its repair mainly relies on a special repair resin attached to the glass fiber to be closely connected to the original pipe, and at the same time, a dense anti-seepage layer is formed between the special repair resin and the glass fiber after curing to prevent the pipe from leaking. However, since it mainly relies on the adhesion of the resin to bond to the original pipe, when repairing a leaking pipe, the water flow will dilute the resin smeared on the surface of the glass fiber, resulting in a poor final repair effect. How to develop a new local trenchless repair process for drainage and sewage pipes is a topic that those skilled in the art need to carry out creative thinking.

[0004] Based on the above description of the existing technology and the defects of the existing technology, the present application designs a novel plastic pipe structure and construction method for replacing an original pipe by a trenchless process to solve this defect of the existing technology. Summary of the Invention

[0005] In view of the deficiencies of the existing technology, the present invention provides a novel plastic pipe structure for replacing an original pipe by a trenchless process, which has the advantages of simple structure, convenient construction, low cost, and remarkable effect, and solves the technical problems existing in the three repair processes in the background art.

[0006] To achieve the above object, the present invention provides the following technical solution: A novel plastic pipe structure for replacing an original pipe by a trenchless process, including a pipe body, characterized in that: an outer wall locking step is provided on one outer wall side of the pipe body, and an inner wall locking step is provided on the other inner wall side of the pipe body. After the outer wall locking step and the inner wall locking step are inserted and connected, they are tightly engaged with each other.

[0007] Among them, the outer wall locking step on one side of the pipe includes a pipe inner hole and a locking step; the inner wall locking step on the other side of the pipe includes a pipe inner hole and a locking step. A sealing ring groove is provided on the outer wall locking step, and the general length of the pipe body is 400 - 1000 mm.

[0008] Furthermore, the outer wall locking step and the inner wall locking step on the other side of the pipe are locking step structures that can be mutually engaged. The steps and the grooves are correspondingly arranged in one or more groups and are closely engaged with each other.

[0009] Furthermore, the step of the outer wall locking step on one side of the pipe is a chamfered trapezoid or triangular structure with an inclined surface, and the groove on the corresponding inner wall locking step is also a chamfered trapezoid or triangular structure with an inclined surface.

[0010] Furthermore, a sealing ring is provided on the sealing ring groove, and the sealing ring is made of a rubber material with certain elasticity.

[0011] Furthermore, the pipe body, the outer wall locking step on one side of the pipe, and the inner wall locking step on the other side of the pipe are integrally processed and formed, and the material can be polypropylene, polyethylene, etc.

[0012] Compared with the prior art, the technical solution of the present application has the following beneficial effects:

[0013] First of all, the pipe structure of the present application adopts a connection design of inner and outer wall locking steps, enabling the pipe bodies to be closely connected, not easily leaking water, greatly improving the drainage efficiency, and having simple and fast installation; secondly, by pushing the pipe bodies into engagement one by one to replace the original drainage pipe, it is not necessary to dig out the entire drainage pipe, greatly reducing the construction volume and construction time, and lowering the construction cost. In addition, the outer wall locking step and the inner wall locking step of the pipe body are closely engaged with each other, and a sealing ring groove is provided on the outer wall locking step, with a sealing ring added, further enhancing the connection stability between the pipe bodies, improving the sealing performance of the drainage pipe, and reducing leakage. The pipe structure and construction method of the present application have the advantages of simple structure, convenient construction, low cost, and remarkable effects, and have high practical value and application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the pipe structure of the present invention;

[0015] Figure 2 It is a partial schematic diagram of the connection structure of two pipe bodies of the present invention;

[0016] Figure 3 It is a schematic diagram of the construction structure of the present invention.

[0017] In the figure: 1 shaft entrance, 2 shaft exit, 3 pipeline main body, 31 outer wall locking step, 32 inner wall locking step, 311 pipeline inner hole, 312 locking step, 313 sealing ring groove, 314 locking step, 315 sealing ring. Specific implementation mode

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0019] Please refer to Figures 1-3 , a new plastic pipeline structure for replacing the original pipeline by a trenchless process in this embodiment, including a pipeline main body 3, characterized in that: an outer wall locking step 31 is provided on one side outer wall of the pipeline main body 3, and an inner wall locking step 32 is provided on the other side inner wall of the pipeline main body 3. After the outer wall locking step 31 and the inner wall locking step 32 are inserted and connected, they are tightly meshed with each other.

[0020] Among them, the outer wall locking step 31 on one side of the pipeline includes a pipeline inner hole 311 and a locking step 312; the inner wall locking step 32 on the other side of the pipeline includes a pipeline inner hole 311 and a locking step 314. A sealing ring groove 313 is provided on the outer wall locking step 31, and the general length of the pipeline main body 3 is 400 - 1000 mm.

[0021] In this embodiment, the design of the step 312 not only increases the strength of the connecting member, but also plays a guiding role during connection, enabling the outer wall locking step 31 to smoothly enter the inner wall locking step 32, realizing a fast and stable connection.

[0022] The outer wall locking step 31 and the inner wall locking step 32 on the other side inner wall of the pipeline are locking step structures that can be meshed with each other. The locking step 312 and the locking step 314 are correspondingly set as one group or multiple groups, and the two are tightly meshed with each other.

[0023] In this embodiment, the main meshing components are the outer wall locking step 312 and the inner wall locking step 314. One group can be set. When certain connection strength and sealing effect are required, multiple groups can be set.

[0024] The step (312) of the outer wall locking step (31) on the outer wall of one side of the pipe is a chamfered trapezoid or triangular structure with an inclined surface, and the upper step (314) of the corresponding inner wall locking step (32) is also a chamfered trapezoid or triangular structure with an inclined surface. The pipe body 3, the outer wall locking step 31 on one side of the pipe, and the inner wall locking step 32 on the other side of the pipe are integrally formed, and the material can be polypropylene, polyethylene, etc.

[0025] In this embodiment, the specific shapes of the step 312 and the step 314 are chamfered trapezoids or triangular structures with inclined surfaces. Since the material of the pipe body 3 can be selected from polypropylene and polyethylene, which have a certain elasticity, when the step 312 and the groove 314 are subjected to a certain pressure extrusion, they will return to their original state, thus completing the connection and achieving sealing.

[0026] A sealing ring 315 is provided on the sealing ring groove 313, and the sealing ring 315 is made of a rubber material with a certain elasticity.

[0027] In addition, the setting of the sealing ring 315 further enhances the sealing performance between the two pipe bodies 3. Since the sealing ring 315 is made of a rubber material with a certain elasticity, it can provide additional sealing pressure during pipe connection, effectively preventing water from leaking through the tiny gaps at the pipe connection. This design not only improves the drainage efficiency but also greatly extends the service life of the pipe.

[0028] The design of the 400 - 1000mm long pipe mainly meets the installation requirements, can be constructed in a smaller space range, reducing the construction difficulty and cost. The sealing ring 315 made of a rubber material with a certain elasticity not only ensures good sealing performance but also can maintain the sealing effect when the pipe undergoes minor deformations due to temperature changes or external forces, further improving the reliability and durability of the pipe.

[0029] In addition, the pipe body 3, the outer wall locking step 31 on one side of the pipe, and the inner wall locking step 32 on the other side of the pipe are integrally formed, avoiding the problems of loosening or leakage that may occur at the connection in the traditional connection method, and improving the overall strength and sealing performance of the pipe. The selection of materials such as polypropylene and polyethylene endows the pipe with good corrosion resistance and anti-aging performance, extending the service life of the pipe.

[0030] The working principle of the above embodiment is as follows:

[0031] (1) Determine the leakage point and damage of the drainage pipe. Based on the existing leakage detection instruments and damaged or collapsed areas, dig two vertical shafts downward from the ground at a suitable construction distance from the damaged drainage pipe. The left vertical shaft is the vertical shaft entrance 1, and the right vertical shaft is the vertical shaft exit 2, and ensure that the drainage pipe can be seen in the vertical shaft entrance 1 and the vertical shaft exit 2;

[0032] (2) After the construction equipment in the prior art enters from the shaft entrance 1, the construction equipment is equipped with a crushing structure and a positioning rod larger than the original pipe diameter. The crushing structure rotates to break the original pipe structure, and the positioning rod can extend from the shaft entrance 1 to the shaft exit 2 and is arranged in the original drain pipe from the shaft entrance 1 to the shaft exit 2. A pipe body 3 with the same diameter as the original drain pipe enters from the shaft entrance 1 into the original drain pipe.

[0033] (3) Push the pipe body 3 along the positioning rod from the shaft entrance 1 towards the shaft exit 2, with the outer wall locking step 31 facing forward. After pushing in one section of the pipe body 3, push the outer wall locking step 31 of the next section of the pipe body 3 into the inner wall locking step 32 of the first section of the pipe body 3, and continue to push in this way until the original drain pipe is completely replaced.

[0034] During the installation process, first align the outer wall locking step 31 of the second section of the pipe body 3 with the inner wall locking step 32 of the first section of the pipe body 3, and gradually push it in along the inclined plane of the step 312. The design of the step 312 makes this process as smooth as a slide rail, greatly reducing the frictional resistance during installation, thereby improving the installation efficiency. Once the outer wall locking step 31 of the second section of the pipe body 3 completely enters the inner wall locking step 32 of the first section of the pipe body 3, the sealing ring 315 will be compressed and closely adhere to the contact surface between the two, forming a tight seal. This design not only ensures the sealing performance at the pipe connection but also effectively prevents various problems caused by loosening or leakage at the connection.

[0035] During operation, the fluid in the pipeline system will smoothly pass through the pipe body 3 for transmission. Since the pipe body 3, the outer wall locking step 31, and the inner wall locking step 32 are integrally formed, the entire pipeline system has extremely high overall strength and sealing performance, and can withstand a certain fluid pressure and external impact force. At the same time, the selection of materials such as polypropylene and polyethylene makes the pipeline have good corrosion resistance and anti-aging performance, and can maintain stable performance even in harsh working environments, thereby extending the service life of the pipeline.

[0036] As an optimal solution, if the pipe body 3 needs to withstand a certain pressure, then at the connection between two pipe bodies 3, an electrofusion belt is used to seal the interface.

[0037] The use of the electrofusion belt further enhances the connection strength between the two pipe bodies. The principle is that through electrofusion technology, the electrofusion belt is melted and combined with the pipe body material to form an almost seamless connection. This treatment method not only improves the stability of the pipeline system in a high-pressure environment but also effectively prevents the leakage risk that may occur due to long-term pressure.

[0038] The construction equipment, positioning rod, etc. mentioned in the text are conventional known equipment and existing publicly available technologies, which will not be elaborated in the text.

[0039] It should be noted that in this text, relational terms such as first and second, one side and the other side, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising 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 limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new plastic pipe structure for replacing the original pipe by a trenchless process, comprising a pipe body (3), characterized in that: An outer wall locking step (31) is provided on one side of the outer wall of the pipe body (3), and an inner wall locking step (32) is provided on the other side of the inner wall of the pipe body (3); the outer wall locking step (31) and the inner wall locking step (32) are tightly meshed with each other after being connected by socket connection. The outer wall locking step (31) on one side of the pipe comprises a pipe inner hole (311) and a locking step (312); the inner wall locking step (32) on the other side of the pipe comprises a pipe inner hole (311) and a locking step (314); a sealing ring groove (313) is provided on the outer wall locking step (31); and the pipe body (3) is generally 400-1000 mm in length.

2. According to claim 1, a new plastic pipe structure for replacing the original pipe by a trenchless process is characterized by: The outer wall locking step (31) and the inner wall locking step (32) of the inner wall on the other side of the pipe are mutually engageable locking step structures, and the outer wall locking step (312) and the inner wall locking step (314) are correspondingly arranged as one or more groups, and the two are tightly engaged with each other.

3. A new plastic pipe structure for replacing the original pipe by a trenchless process according to any one of claims 1 and 2, characterized in that: The step (312) of the outer wall locking step (31) on the outer wall of one side of the pipe is a chamfered trapezoidal or triangular structure, and the corresponding groove (314) on the inner wall locking step (32) is also a chamfered trapezoidal or triangular structure.

4. The novel plastic pipe structure for replacing the original pipe by a trenchless process according to claim 3 is characterized by: A sealing ring (315) is provided on the sealing ring groove (313), and the sealing ring (315) is made of a rubber material with a certain elasticity.

5. According to claim 1, a new plastic pipe structure for replacing the original pipe by a trenchless process is characterized by: The pipe body (3) is integrally formed with the outer wall locking step (31) on one side of the pipe and the inner wall locking step (32) on the other side of the pipe, and the material may be polypropylene, polyethylene, etc.

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