A convenient PSP steel-plastic composite pipe
By using socket and spigot joints and a quick-locking design, the complex connection and high equipment dependence of traditional PSP steel-plastic composite pipes are solved, achieving fast and simple connection and efficient sealing effect, suitable for various environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- THE FIRST CONSTR ENG COMPANY LTD OF CHINA CONSTR SECOND ENG BUREAU
- Filing Date
- 2025-09-09
- Publication Date
- 2026-07-03
AI Technical Summary
Traditional PSP steel-plastic composite pipes have complex connection methods, rely on multiple metal fittings, have low construction efficiency, are difficult to adapt to emergency repairs and field construction, and pose a risk of leakage; electrofusion connection equipment is highly dependent, has complex operation, and is easily affected by the environment.
It adopts the insertion and mating of socket joints and spigot joints, and is fastened with quick-locking clamps. The sealing ring is made of EPDM rubber with a trapezoidal cross section, and the locking clamp is made of stainless steel with an anti-corrosion coating. The design of fastening bolts and nuts facilitates quick connection and disassembly.
It achieves a quick and easy connection process, is suitable for emergency repairs and field construction, improves sealing and mechanical strength, reduces installation difficulty and maintenance costs, and is suitable for a variety of harsh environments.
Smart Images
Figure CN224453973U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of PSP steel-plastic composite pipe, specifically to a PSP steel-plastic composite pipe that is easy to connect. Background Technology
[0002] PSP steel-plastic composite pipe is a composite structure pipe with high-strength steel strip as the reinforcing skeleton layer and high-density polyethylene or other engineering plastics covering the inner and outer surfaces. It retains the excellent mechanical strength and impact resistance of metal materials, and has the excellent chemical corrosion resistance, aging resistance and low fluid resistance of plastics. Therefore, it is widely used in many fields such as municipal water supply, gas transmission, industrial chemical fluid transmission, mining slurry transmission and power cable protection.
[0003] Currently, traditional PSP steel-plastic composite pipes are mostly connected by flanges or electrofusion. Flange connections rely on multiple metal fittings such as bolts, gaskets, and flanges. During installation, the holes must be aligned one by one and the bolts tightened evenly, which requires a high level of technical skill from the operators. Moreover, the construction efficiency is low in confined or high-altitude work spaces. In addition, the bolts may corrode and loosen after long-term use, leading to leakage risks and high maintenance costs.
[0004] Electrofusion welding uses specialized electrofusion equipment to heat the pipe fittings with pre-embedded heating wires, causing the plastic layer to melt and fuse to achieve a connection. Although this method can achieve a high degree of sealing, it is highly dependent on the equipment. Power supply and professional welding tools are required on site. The operation process requires strict control of temperature, time, and pressure parameters. After welding, the joint must be allowed to cool and solidify naturally. The whole process is time-consuming and difficult to adapt to time-sensitive scenarios such as emergency repairs, temporary pipeline laying, or field construction. Especially under adverse weather conditions, the welding quality is easily affected by environmental factors, further increasing the uncertainty of construction. Utility Model Content
[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a PSP steel-plastic composite pipe that is easy to connect, which can effectively solve the problems mentioned in the background technology.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] This utility model provides a convenient PSP steel-plastic composite pipe, comprising: a pipe body and a connecting assembly. The connecting assembly includes a socket joint and a spigot joint. The socket joint is fixedly connected to one end of the pipe body. An annular sealing groove is provided on one side of the socket joint, and a sealing ring is snapped into the annular sealing groove. The spigot joint is fixedly connected to the other end of the pipe body. An annular protrusion corresponding to the annular sealing groove is fixed on one side of the spigot joint. The annular protrusion and the annular sealing groove are interlocked. The outer walls of the socket joint and the spigot joint are fitted with quick-locking clamps. The quick-locking clamps include a first clamp and a second clamp. One end of the first clamp and the second clamp are hinged together by a hinge.
[0008] Furthermore, the pipe body consists of an inner plastic layer, a steel strip reinforcement layer, and an outer plastic layer from the inside out. The steel strip reinforcement layer is fixed to the inner and outer plastic layers by hot-melt bonding. Both the inner and outer plastic layers are made of polyethylene, and the steel strip reinforcement layer is made of galvanized steel strip.
[0009] Furthermore, reinforcing ribs are provided at the connection between the socket joint and the pipe body, and at the connection between the spigot joint and the pipe body. The reinforcing ribs are integrally formed with the pipe body, the socket joint, and the spigot joint, respectively.
[0010] Furthermore, the sealing ring is made of EPDM rubber, and its cross-section is trapezoidal. The quick-lock clamp is made of stainless steel and its outer wall is coated with an anti-corrosion coating.
[0011] Furthermore, a connecting seat is fixedly connected to the other end of the first clamp, and a U-shaped seat is fixedly connected to the other end of the second clamp. A fastening bolt is rotatably connected to the middle of the connecting seat, and a fastening nut is threaded onto the surface of the fastening bolt. The fastening nut and the U-shaped seat abut against each other.
[0012] Furthermore, both the socket joint and the spigot joint have a first guide slope on their outer side walls, and both the first clamp and the second clamp have a second guide slope on their inner walls. The second guide slope and the first guide slope are connected to each other.
[0013] The technical solution provided by this utility model has the following advantages compared with the known prior art:
[0014] 1. Through the design of the connection components, the socket joint and spigot joint are plugged in and fastened with quick-locking clamps. No complicated equipment or special tools are required, making operation simple and greatly shortening the connection time. It is especially suitable for time-sensitive applications such as emergency repairs, temporary laying, or field construction.
[0015] 2. The EPDM rubber sealing ring with a trapezoidal cross-section has good elasticity and aging resistance. After the annular protrusion and the annular sealing groove are inserted, multiple seals are formed, which effectively prevents fluid leakage and improves the safety and reliability of the pipeline system. The pipe body adopts a hot-melt composite structure of steel strip reinforcement layer and inner and outer polyethylene layers, which has strong pressure bearing capacity. The joint is equipped with an integrally formed reinforcing rib, which further enhances the mechanical strength and impact resistance of the connection part and extends the service life of the pipeline.
[0016] 3. The quick-locking clamp is made of stainless steel and coated with an anti-corrosion coating, which has good corrosion resistance and is suitable for various harsh environments. The design of the fastening bolt and fastening nut allows the clamp to be repeatedly disassembled and tightened, which is convenient for later maintenance and repair. The first guide slope on the outside of the socket joint and the second guide slope on the inner wall of the quick-locking clamp cooperates with each other to play an automatic guiding and positioning role during installation, reducing the difficulty of installation and ensuring quick and accurate connection. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.
[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0019] Figure 2 This is a schematic diagram of the overall cross-sectional structure of this utility model;
[0020] Figure 3 For the present utility model Figure 2 Enlarged structural diagram at point A;
[0021] Figure 4 This is a schematic diagram of the socket joint structure of this utility model;
[0022] Figure 5 This is a schematic diagram of the plug connector structure of this utility model;
[0023] Figure 6 This is a schematic diagram of the quick-locking clamp structure of this utility model.
[0024] The labels in the diagram represent:
[0025] 1. Pipe body; 11. Inner plastic layer; 12. Steel strip reinforcement layer; 13. Outer plastic layer; 2. Connecting components; 21. Socket joint; 211. Annular sealing groove; 22. Spiral joint; 221. Annular protrusion; 23. Sealing ring; 24. First guide slope; 25. Quick-locking clamp; 251. First clamp; 252. Second clamp; 253. Hinge; 254. Connecting seat; 255. U-shaped seat; 256. Fastening bolt; 257. Fastening nut; 258. Second guide slope; 3. Reinforcing rib. Detailed Implementation
[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0027] The present invention will be further described below with reference to the embodiments.
[0028] Example 1:
[0029] Reference Figure 1-6 This is the first embodiment of the present invention, which discloses a PSP steel-plastic composite pipe with convenient connection, including: a pipe body 1 and a connecting component 2. The connecting component 2 includes a socket joint 21 and a spigot joint 22. The socket joint 21 is fixedly connected to one end of the pipe body 1. An annular sealing groove 211 is provided on one side of the socket joint 21, and a sealing ring 23 is snapped into the annular sealing groove 211. The spigot joint 22 is fixedly connected to the other end of the pipe body 1. An annular protrusion 221 corresponding to the annular sealing groove 211 is fixed on one side of the spigot joint 22. The annular protrusion 221 and the annular sealing groove 211 are interlocked. The outer walls of the socket joint 21 and the spigot joint 22 are fitted with quick-locking clamps 25. The quick-locking clamps 25 include a first clamp 251 and a second clamp 252. One end of the first clamp 251 and the second clamp 252 are hinged by a hinge 253.
[0030] With the connection component 2 in place, the socket connector 21 and the spigot connector 22 are plugged into each other and fastened with the quick-locking clamp 25. No complicated equipment or special tools are required, making the operation simple and greatly shortening the connection time. It is especially suitable for time-sensitive application scenarios such as emergency repairs, temporary laying or field construction.
[0031] Example 2:
[0032] Reference Figure 1-6This is the second embodiment of the present invention, which differs from the first embodiment in that:
[0033] The pipe body 1 consists of an inner plastic layer 11, a steel strip reinforcement layer 12, and an outer plastic layer 13 from the inside out. The steel strip reinforcement layer 12 is fixed to the inner plastic layer 11 and the outer plastic layer 13 by hot-melt bonding. The inner plastic layer 11 and the outer plastic layer 13 are both made of polyethylene. The steel strip reinforcement layer 12 is made of galvanized steel strip. The connection between the socket joint 21 and the pipe body 1 and the connection between the spigot joint 22 and the pipe body 1 are provided with reinforcing ribs 3. The reinforcing ribs 3 are integrally formed with the pipe body 1, the socket joint 21, and the spigot joint 22, respectively. The sealing ring 23 is made of EPDM rubber and has a trapezoidal cross-section. The quick-locking clamp 25 is made of stainless steel and has an anti-corrosion coating on its outer wall.
[0034] The EPDM rubber sealing ring 23 with a trapezoidal cross section has good elasticity and aging resistance. After the annular protrusion 221 and the annular sealing groove 211 are inserted, multiple seals are formed, which effectively prevents fluid leakage and improves the safety and reliability of the pipeline system. The pipe body 1 adopts a hot-melt composite structure of steel strip reinforcement layer 12 and inner and outer polyethylene layers, which has strong pressure bearing capacity. The joint is provided with an integrally formed reinforcing rib 3, which further enhances the mechanical strength and impact resistance of the connection part and extends the service life of the pipeline.
[0035] The other end of the first clamp 251 is fixedly connected to the connecting seat 254, and the other end of the second clamp 252 is fixedly connected to the U-shaped seat 255. The middle part of the connecting seat 254 is rotatably connected to the fastening bolt 256, and the surface of the fastening bolt 256 is threaded with the fastening nut 257. The fastening nut 257 and the U-shaped seat 255 abut against each other. The outer walls of the socket joint 21 and the spigot joint 22 are provided with the first guide slope 24, and the inner walls of the first clamp 251 and the second clamp 252 are provided with the second guide slope 258. The second guide slope 258 and the first guide slope 24 are connected to each other.
[0036] The quick-locking clamp 25 is made of stainless steel and coated with an anti-corrosion coating, which has good corrosion resistance and is suitable for various harsh environments. The design of the fastening bolt 256 and fastening nut 257 allows the clamp to be repeatedly disassembled and tightened, which facilitates later maintenance and repair. The first guide slope 24 on the outside of the socket joint 21 and the spigot joint 22 cooperates with the second guide slope 258 on the inner wall of the quick-locking clamp 25, which plays an automatic guiding and positioning role during installation, reducing the installation difficulty and ensuring quick and accurate connection.
[0037] The remaining structure is the same as that in Example 1.
[0038] The workflow of this utility model is as follows:
[0039] First, confirm that the socket joint 21 and spigot joint 22 of the two PSP steel-plastic composite pipes to be connected are intact. Check whether the sealing ring 23 has been correctly inserted into the annular sealing groove 211 of the socket joint 21 and ensure that it is free from aging, deformation or damage. Clean the dust, oil or foreign objects from the joint area. Then, align the annular protrusion 221 of the spigot joint 22 of one pipe body 1 with the annular sealing groove 211 of the socket joint 21 of the other pipe body 1. Insert the spigot joint 22 smoothly into the socket joint 21 until the annular protrusion 221 is fully inserted into the annular sealing groove 211 and fully contacts and compresses the sealing ring 23 to form a preliminary seal.
[0040] Next, open the first clamp 251 and the second clamp 252 of the quick-locking clamp 25 so that they surround the outer walls of the already connected socket joint 21 and spigot joint 22. Use the second guide slope 258 on the inner wall of the quick-locking clamp 25 to cooperate with the first guide slope 24 on the joint to ensure accurate positioning of the clamp. Close the first clamp 251 and the second clamp 252. Then, pass the fastening bolt 256 on the connecting seat 254 through the U-shaped seat 255 and tighten the fastening nut 257 on the fastening bolt 256 so that it abuts against the U-shaped seat 255 and generates sufficient clamping force. This force is transmitted to the outside of the joint through the quick-locking clamp 25 to ensure that the connection between the socket joint 21 and the spigot joint 22 is tight and firm, and further compress the sealing ring 23 to enhance the sealing effect.
[0041] Finally, check whether the quick-locking clamp 25 is installed flat and tightened in place, and confirm that there are no visible gaps at the connection. For pressure pipeline systems, necessary pressure tests can be performed to verify the sealing and reliability of the connection. When maintenance or disassembly is required, simply loosen and remove the fastening nut 257, open the quick-locking clamp 25, and the joint of the two pipe sections 1 can be separated. The operation is simple.
[0042] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.
Claims
1. A PSP steel-plastic composite pipe which is easy to connect, characterized in that, include: The pipe body (1) and the connecting assembly (2) include a socket joint (21) and a spigot joint (22). The socket joint (21) is fixedly connected to one end of the pipe body (1). An annular sealing groove (211) is provided on one side of the socket joint (211), and a sealing ring (23) is snapped into the annular sealing groove (211). The spigot joint (22) is fixedly connected to the other end of the pipe body (1), and one side of the spigot joint (22) is fixed. There is an annular protrusion (221) corresponding to the annular sealing groove (211). The annular protrusion (221) and the annular sealing groove (211) are interlocked. The outer walls of the socket joint (21) and the plug joint (22) are fitted with quick-locking clamps (25). The quick-locking clamps (25) include a first clamp (251) and a second clamp (252). One end of the first clamp (251) and the second clamp (252) are hinged by a hinge (253).
2. The PSP steel-plastic composite pipe according to claim 1, wherein The tube body (1) consists of an inner plastic layer (11), a steel strip reinforcement layer (12), and an outer plastic layer (13) from the inside to the outside. The steel strip reinforcement layer (12) is fixed to the inner plastic layer (11) and the outer plastic layer (13) by hot melt bonding. The inner plastic layer (11) and the outer plastic layer (13) are both made of polyethylene, and the steel strip reinforcement layer (12) is made of galvanized steel strip.
3. The PSP steel-plastic composite pipe according to claim 1, wherein The connection between the socket joint (21) and the pipe body (1) and the connection between the spigot joint (22) and the pipe body (1) are provided with reinforcing ribs (3), which are integrally formed with the pipe body (1), the socket joint (21) and the spigot joint (22) respectively.
4. The PSP steel-plastic composite pipe according to claim 1, wherein The sealing ring (23) is made of EPDM rubber, and the cross-section of the sealing ring (23) is trapezoidal. The clamp of the quick lock (25) is made of stainless steel and the outer wall is coated with an anti-corrosion coating.
5. The PSP steel-plastic composite pipe according to claim 1, wherein The other end of the first clamp (251) is fixedly connected to a connecting seat (254), and the other end of the second clamp (252) is fixedly connected to a U-shaped seat (255). A fastening bolt (256) is rotatably connected to the middle of the connecting seat (254), and a fastening nut (257) is threaded onto the surface of the fastening bolt (256). The fastening nut (257) and the U-shaped seat (255) abut against each other.
6. The PSP steel-plastic composite pipe according to claim 1, wherein The outer walls of the socket joint (21) and the spigot joint (22) are provided with a first guide slope (24), and the inner walls of the first clamp (251) and the second clamp (252) are provided with a second guide slope (258). The second guide slope (258) and the first guide slope (24) are connected to each other.