PE and steel skeleton composite pipe and pipe connecting structure
By employing adjustable expansion joints and locking mechanisms in PE and steel-reinforced composite pipes, the problems of poor sealing performance and low construction efficiency in existing technologies have been solved, achieving convenient and efficient connection and flexible sealing effects.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- KANGMINGYUAN GUIZHOU SCI & TECH DEV CO LTD
- Filing Date
- 2025-03-10
- Publication Date
- 2026-06-23
Smart Images
Figure CN224397337U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of pipes, and in particular to a PE and steel-reinforced composite pipe and a pipe connection structure. Background Technology
[0002] The descriptions in this section provide background information related to this disclosure only and do not constitute prior art. In related technologies, PE and steel-reinforced composite pipes (steel wire mesh reinforced polyethylene composite pipes) are a new type of pipe material that uses a mesh skeleton formed by left and right spiral winding of high-strength steel wire as reinforcement, high-density polyethylene (HDPE) as the matrix, and uses high-performance HDPE modified bonding resin to tightly connect the steel wire skeleton with the inner and outer layers of high-density polyethylene.
[0003] When connecting these pipes, a sleeve is used to tightly fit the two ends of adjacent pipes together, and an electric heating wire is used to heat-fuse the inner wall of the sleeve to the outer wall of the pipe, forming a stable connection structure. However, this structure lacks a sealing ring, resulting in poor sealing performance. Furthermore, it requires heat connection during on-site construction, making operation inconvenient and requiring waiting for the pipes to cool down, leading to low efficiency. Summary of the Invention
[0004] In view of this, this application provides a PE and steel-reinforced composite pipe and a pipe connection structure, which is easy to install, has good sealing performance, and the tightness of the sealing ring is adjustable.
[0005] To achieve the above objectives, this application employs the following technical solution:
[0006] A PE and steel-reinforced composite pipe, characterized in that: it includes a pipe body, with a socket end and a spigot end fixedly provided at both ends of the pipe body, the socket end being used to receive the spigot end of another pipe; the socket end is provided with at least one alternating and stretchable expansion wave, the internal groove of the expansion wave being used to install a sealing ring, the outer wall of the spigot section being able to cooperate with the inner ring of the sealing ring, a first pair of locking members being fixedly provided on the socket end, the first pair of locking members being located on the side of the expansion wave closer to the socket end, and a second pair of locking members being fixedly provided on the pipe body, capable of being fixedly locked with the first pair of locking members of another pipe; the spigot end can axially abut against the socket end or pipe body of another pipe, and after the spigot end axially abuts against the socket end or pipe body of another pipe, the axial position of the first pair of locking members relative to the second pair of locking members of the other pipe is relatively adjustable, thereby adjusting the stretching degree of the expansion wave to adjust the tightness of the sealing ring.
[0007] The aforementioned PE and steel-reinforced composite pipe uses a first pair of locking members and a second pair of locking members for locking connection. Compared with on-site heat fusion connection, this method is more convenient and efficient in installation. Furthermore, after the pipes are connected, the sealing ring is installed in the groove of the expansion joint. When the pipes are buried in the soil and subjected to external forces (such as geological settlement), the expansion joint tends to be flattened. At this time, the expansion joint not only acts as an axial buffer, but the more it is stretched, the greater the compressive force on the sealing ring, resulting in a tighter seal and better pipe sealing. Moreover, when connecting two pipes, the axial position of the first pair of locking members relative to the second pair of locking members of the other pipe is adjustable. This allows adjustment of the stretching degree of the expansion joint, thereby adjusting the compressive force of the expansion joint on the sealing ring. This makes the sealing performance of the sealing ring adjustable and provides good flexibility.
[0008] In some embodiments, the first pair of locking elements is a first connecting disc; the second pair of locking elements is a second connecting disc, and the first connecting disc is connected to the second connecting disc of another pipe by a first bolt. During installation, since the spigot end of the second pipe presses against the body of the first pipe, the first connecting disc will gradually move closer to the second connecting disc during the tightening of the first bolt. At this time, the expansion wave will be gradually flattened, thereby compressing the sealing ring.
[0009] In some embodiments, the first pair of locking members are integrally formed with the socket end or are detachably connected separately. The detachable connection can be achieved by using two semi-circular structures locked together with bolts.
[0010] In some embodiments, the second pair of locking members is heat-fused to the tube body via a heating wire. The second pair of locking members is composed of two or more arc-shaped connecting units spliced together and fitted onto the tube body. The arc-shaped connecting units can be connected by bolts or snap-fit connections. Because the distance between the ports of the second pair of locking members and the insertion end is relatively long, the heat-fused connection with the heating wire usually requires a tight fit. If a round tube is directly fitted onto the tube body, it would be extremely difficult to press a long distance inward from the port position. Therefore, the second pair of locking members is spliced together from two or more arc-shaped connecting units.
[0011] In some embodiments, the socket end and the pipe body are connected by electrothermal fusion or injection molding. The socket end is a separate component of the pipe body because PE and steel-reinforced composite pipes cannot be directly integrally molded during production. Therefore, the socket end and pipe body can be directly heat-fused at the factory, requiring only the first and second pairs of locking fittings to be connected during pipe installation. Alternatively, the pipe body can be moved to an injection molding machine and the socket end and pipe body can be formed secondaryly through injection molding. Preferably, the socket end is also made of plastic material, such as PE or PP.
[0012] In some implementations, the second pair of locking elements is also connected to the tube body via injection molding.
[0013] In some embodiments, the first pair of locking members has one or more circumferentially spaced anti-disengagement hooks, and the second pair of locking members has two or more axially spaced slots. The anti-disengagement hooks are selectively engaged in the corresponding slots. This type of connection is simpler to implement than a flange connection structure; the anti-disengagement hooks are simply engaged into the corresponding slots. When the anti-disengagement hooks are engaged in different slots, the degree of stretching of the expansion wave varies. However, since there is a certain distance between the slots, stepless adjustment is not possible like with bolts.
[0014] This application also provides a PE and steel-reinforced composite pipe connection structure, characterized in that: it includes a first pipe body and a second pipe body; a socket end is fixedly provided at one end of the first pipe body, and a spigot end is fixedly provided at one end of the second pipe body, the spigot end being inserted into the socket end; at least one alternating and stretchable expansion wave is provided in the socket end, and a sealing ring is installed in the internal groove of the expansion wave; the spigot end of the second pipe body passes through the inner ring of the sealing ring; a first pair of locking members is fixedly provided on the socket end, the first pair of locking members being located on the side of the expansion wave closer to the socket end; a second pair of locking members is fixedly provided on the second pipe body, capable of being locked in place with the first pair of locking members; the spigot end axially abuts against the socket end or the first pipe body, and after the spigot end axially abuts against the socket end or the pipe body of another pipe, the axial position of the first pair of locking members relative to the second pair of locking members is adjustable, thereby adjusting the stretching degree of the expansion wave to adjust the tightness of the sealing ring.
[0015] In some embodiments, the first pair of locking elements is a first connecting plate; the second pair of locking elements is a second connecting plate, and the first connecting plate and the second connecting plate are connected by a first bolt.
[0016] As can be seen from the above technical solution, this application has at least the following advantages and positive effects:
[0017] This application discloses a PE and steel-reinforced composite pipe, which uses a first pair of locking members and a second pair of locking members for locking connection. Compared with on-site heat fusion connection, this method is more convenient and efficient in installation. After the pipes are connected, the sealing ring is installed in the groove of the expansion joint. When the pipes are buried in the soil and subjected to external forces (such as geological settlement), the expansion joint tends to be flattened. At this time, the expansion joint not only acts as an axial buffer, but the more it is stretched, the greater the compressive force on the sealing ring, resulting in a tighter seal and better pipe sealing. Furthermore, when connecting two pipes, the axial position of the first pair of locking members relative to the second pair of locking members of the other pipe is adjustable. This allows adjustment of the stretching degree of the expansion joint, thereby adjusting the compressive force of the expansion joint on the sealing ring. This makes the sealing performance of the sealing ring adjustable and provides good flexibility. Attached Figure Description
[0018] Figure 1This is a schematic diagram of the structure of the first embodiment of this application;
[0019] Figure 2 This is a connection diagram of the first embodiment of this application;
[0020] Figure 3 This is a schematic diagram of the internal connections in the first embodiment of this application;
[0021] Figure 4 This is a schematic diagram of the internal connections in the second embodiment of this application;
[0022] Figure 5 This is a schematic diagram of the internal connections of the third embodiment of this application.
[0023] Labeling Explanation: 1. Pipe body; 2. Socket end; 21. Expansion wave; 3. Spiral end; 4. Sealing ring; 5. First pair of locking elements; 6. Second pair of locking elements; 7. First bolt; 8. Heating wire; 9. Anti-disengagement hook; 10. Slot. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of this application clearer, the application will be described in further detail below with reference to the accompanying drawings. The terminology used in the embodiments section of this application is only for explaining specific embodiments and is not intended to limit the application.
[0025] Example 1:
[0026] See Figures 1 to 3 This application provides a PE and steel-reinforced composite pipe, including a pipe body 1. A socket end 2 and a spigot end 3 are fixedly provided at both ends of the pipe body 1. The socket end 2 is used to receive the spigot end 3 of another pipe. The socket end 2 has at least one alternating and stretchable expansion wave 21. The internal groove of the expansion wave 21 is used to install a sealing ring 4. The outer wall of the spigot section can cooperate with the inner ring of the sealing ring 4. A first pair of locking members 5 are fixedly provided on the socket end 2. On the side of the expansion wave 21 near the socket end 2, a second pair of locking members 6 is fixedly installed on the pipe body 1, which can be fixedly locked with the first pair of locking members 5 of another pipe. The spigot end 3 can axially abut against the socket end 2 or the pipe body 1 of another pipe. After the spigot end 3 axially abuts against the socket end 2 or the pipe body 1 of another pipe, the axial position of the first pair of locking members 5 relative to the second pair of locking members 6 of the other pipe is relatively adjustable, so as to adjust the degree of stretching of the expansion wave 21 and adjust the tightness of the sealing ring 4.
[0027] This PE and steel-reinforced composite pipe uses a first pair of locking members 5 and a second pair of locking members 6 for locking connection. Compared with on-site heat fusion connection, installation is more convenient and efficient. After the pipes are connected, the sealing ring 4 is installed in the groove of the expansion wave 21. When the pipeline is buried in the soil after connection, the expansion wave 21 tends to be flattened when the pipes are pulled by external forces. At this time, the expansion wave 21 not only plays an axial buffering role, but also the more the expansion wave 21 is pulled, the greater the extrusion force on the sealing ring 4, and the tighter the sealing ring 4 is compressed, resulting in good pipeline sealing performance. Moreover, when the two pipes are connected, the axial position of the first pair of locking members 5 relative to the second pair of locking members 6 of the other pipe can be adjusted. This allows adjustment of the stretching degree of the expansion wave 21, thereby adjusting the extrusion force on the sealing ring 4. Thus, the sealing performance of the sealing ring 4 is adjustable and flexible.
[0028] The first pair of locking elements 5 is the first connecting plate; the second pair of locking elements 6 is the second connecting plate. The first connecting plate is connected to the second connecting plate of the other pipe by the first bolt 7. During installation, since the spigot end 3 of the second pipe is pressed against the pipe body 1 of the first pipe, the first connecting plate will gradually move closer to the second connecting plate during the tightening of the first bolt 7. At this time, the expansion wave 21 will be gradually flattened, thereby compressing the sealing ring 4.
[0029] The first pair of locking elements 5 are integrally formed with the socket end 2 or can be detachably connected separately. The detachable connection can use two semi-circular structures that are locked together with bolts.
[0030] The second pair of locking elements 6 is heat-fused to the tube body 1 via a heating wire 8. The second pair of locking elements 6 is composed of two or more arc-shaped connecting units spliced together and fitted onto the tube body 1. The arc-shaped connecting units can be connected by bolts or clips. Because the distance between the ports of the second pair of locking elements 6 and the insertion end 3 is relatively long, the heat-fused connection of the heating wire 8 usually requires a tight fit. If a round tube is directly fitted onto the tube body 1, it would be extremely difficult to press a long distance inward from the port position. Therefore, the second pair of locking elements 6 is composed of two or more arc-shaped connecting units spliced together.
[0031] The socket end 2 and the second pair of locking members 6 are heat-fused to the pipe body 1 via heating wire 8. The socket end 2 and the second pair of locking members 6 are separate components of the pipe body 1 because the socket end 2 cannot be integrally formed during the production of PE and steel-reinforced composite pipes. Therefore, the socket end 2 and the second pair of locking members 6 can be heat-fused directly to the pipe body 1 at the factory. During pipe laying, only the first pair of locking members 5 and the second pair of locking members 6 need to be connected.
[0032] Example 2:
[0033] See Figure 4This illustrates another embodiment of the present application, in which the socket end 2 and the second pair of locking members 6 are connected to the tube body 1 by injection molding. After the tube body 1 is manufactured, it is transferred to an injection molding machine and the socket end 2 and the second pair of locking members 6 are formed to the tube body 1 by injection molding. Preferably, the socket end 2 is also made of plastic material, such as PE or PP.
[0034] Example 3:
[0035] See Figure 5 This illustrates another embodiment of the present application, which differs from Embodiment 1 in that: the first pair of locking members 5 is provided with one or more circumferentially spaced anti-disengagement hooks 9, and the second pair of locking members 6 is provided with two or more axially spaced slots 10, with the anti-disengagement hooks 9 selectively engaging in the corresponding slots 10. This connection method is simpler to implement than a flange connection structure; simply insert the anti-disengagement hooks 9 into the corresponding slots 10. When the anti-disengagement hooks 9 are engaged in different slots 10, the degree of stretching of the telescopic wave 21 varies. However, since there is a certain distance between the slots 10, stepless adjustment is not possible like with bolts.
[0036] Example 4:
[0037] See Figure 3 This application also provides a PE and steel-reinforced composite pipe connection structure, including a first pipe body 1 and a second pipe body 1. A socket end 2 is fixedly provided at one end of the first pipe body 1, and a spigot end 3 is fixedly provided at one end of the second pipe body 1. The spigot end 3 is used to be inserted into the socket end 2. At least one alternating and stretchable expansion wave 21 is provided in the socket end 2. A sealing ring 4 is installed in the internal groove of the expansion wave 21. The spigot end 3 of the second pipe body 1 passes through the inner ring of the sealing ring 4. A first pair of locking pieces 5 is fixedly installed on the upper part of the tube. The first pair of locking pieces 5 are located on the side of the port end 2 closer to the socket end 2 relative to the telescopic wave 21. A second pair of locking pieces 6 is fixedly installed on the second tube body 1, which can be locked with the first pair of locking pieces 5. The spigot end 3 axially abuts against the socket end 2 or the first tube body 1. After the spigot end 3 axially abuts against the socket end 2 or the tube body 1 of another tube, the axial position of the first pair of locking pieces 5 relative to the second pair of locking pieces 6 is relatively adjustable, thereby adjusting the degree of stretching of the telescopic wave 21 to adjust the tightness of the sealing ring 4.
[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them; although the embodiments of this application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A PE and steel-reinforced composite pipe, characterized in that: The device includes a pipe body (1), with a socket end (2) and a spigot end (3) fixedly provided at both ends of the pipe body (1). The socket end (2) is used to receive the spigot end (3) of another pipe. The socket end (2) is provided with at least one convex and concave-convex and stretchable expansion wave (21). The internal groove of the expansion wave (21) is used to install a sealing ring (4). The outer wall of the spigot end can cooperate with the inner ring of the sealing ring (4). A first pair of locking members (5) is fixedly provided on the socket end (2). The first pair of locking members (5) are close to the expansion wave (21). On the side of the port near the socket end (2), the pipe body (1) is fixedly provided with a second pair of locking members (6) that can be fixedly locked with the first pair of locking members (5) of another pipe; the spigot end (3) can axially abut against the socket end (2) or the pipe body (1) of another pipe, and after the spigot end (3) axially abuts against the socket end (2) or the pipe body (1) of another pipe, the axial position of the first pair of locking members (5) relative to the second pair of locking members (6) of the other pipe can be adjusted, so as to adjust the stretching degree of the expansion wave (21) to adjust the tightness of the sealing ring (4).
2. The PE and steel-reinforced composite pipe according to claim 1, characterized in that: The first pair of locking pieces (5) is the first connecting plate; the second pair of locking pieces (6) is the second connecting plate, and the first connecting plate is connected to the second connecting plate of the other pipe by the first bolt (7).
3. The PE and steel-reinforced composite pipe according to claim 1, characterized in that: The first pair of locks (5) and the socket end (2) are integrally formed or can be detachably connected separately.
4. The PE and steel-reinforced composite pipe according to claim 1, characterized in that: The second pair of locking elements (6) are heat-fused to the tube body (1) by heating wire (8). The second pair of locking elements (6) is made of two or more arc-shaped connecting units and is fitted onto the tube body (1).
5. The PE and steel-reinforced composite pipe according to claim 1, characterized in that: The socket end (2) and the pipe body (1) are connected by hot-melt connection with electric heating wire (8) or by injection molding.
6. The PE and steel-reinforced composite pipe according to claim 1, characterized in that: The first pair of locking members (5) is provided with one or more anti-disengagement hooks (9) spaced apart circumferentially, and the second pair of locking members (6) is provided with two or more slots (10) spaced apart axially, and the anti-disengagement hooks (9) are selectively engaged in the corresponding slots (10).
7. The PE and steel-reinforced composite pipe according to claim 1, characterized in that: The insertion end (3) is formed from one end of the tube body (1).
8. A connection structure for PE and steel-reinforced composite pipes, characterized in that: The system includes a first pipe body and a second pipe body. A socket end (2) is fixedly provided at one end of the first pipe body, and a spigot end (3) is fixedly provided at one end of the second pipe body. The spigot end (3) is used to be inserted into the socket end (2). At least one convex and concave-convex and stretchable expansion wave (21) is provided in the socket end (2). A sealing ring (4) is installed in the internal groove of the expansion wave (21). The spigot end (3) of the second pipe body passes through the inner ring of the sealing ring (4). A first pair of locking members (5) is fixedly provided on the socket end (2). A pair of locking pieces (5) are positioned relative to the expansion wave (21) on the port side of the socket end (2). A second pair of locking pieces (6) is fixedly installed on the second pipe body and can be fixedly locked with the first pair of locking pieces (5). The spigot end (3) axially abuts against the socket end (2) or the first pipe body. After the spigot end (3) axially abuts against the socket end (2) or the pipe body (1) of another pipe, the axial position of the first pair of locking pieces (5) relative to the second pair of locking pieces (6) is relatively adjustable, thereby adjusting the stretching degree of the expansion wave (21) to adjust the tightness of the sealing ring (4).
9. The PE and steel-reinforced composite pipe connection structure according to claim 8, characterized in that: The first pair of locking pieces (5) is a first connecting plate; the second pair of locking pieces (6) is a second connecting plate, and the first connecting plate and the second connecting plate are connected by a first bolt (7).