A polytetrafluoroethylene composite pipe joint that is easy to replace
By designing a detachable PTFE composite pipe joint, the joint body can be replaced independently using mounting parts and locking components. This solves the problem of difficult replacement of traditional joints, improves maintenance efficiency and reduces costs, while maintaining connection strength and sealing performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI XUHONG TEFU TECH CO LTD
- Filing Date
- 2025-09-19
- Publication Date
- 2026-07-21
AI Technical Summary
The fixed structure of existing PTFE composite pipe joints makes replacement difficult, resulting in material waste and economic losses. Furthermore, the replacement process is cumbersome and affects efficiency.
Design a detachable polytetrafluoroethylene composite pipe connector. The connector body can be replaced independently through mounting parts, fixing mechanism and locking assembly. The connection strength and sealing performance are ensured by the socket fit between the core and the locking block and the radial locking of the locking assembly.
It enables quick replacement of joints, avoids cutting and scrapping entire pipe sections, reduces maintenance costs, improves maintenance efficiency, and maintains connection strength and sealing reliability.
Smart Images
Figure CN224533818U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of polytetrafluoroethylene composite pipe joints, specifically relating to a polytetrafluoroethylene composite pipe joint that is easy to replace. Background Technology
[0002] Polytetrafluoroethylene (PTFE) composite pipes are widely used in fluid transport systems in industries such as chemical, pharmaceutical, food, and electronics due to their excellent corrosion resistance, high and low temperature resistance, non-adhesion, and insulation properties. As a key component for pipeline connections, the performance of pipe fittings directly affects the sealing, reliability, and service life of the entire pipeline system.
[0003] In existing technologies, the pipe fittings used in polytetrafluoroethylene (PTFE) composite pipes are mostly fixed structures. Specifically, the fittings are usually firmly bonded to the composite pipe body as a whole through methods such as heating, welding, bonding, or mechanical crimping.
[0004] While this fixed installation method provides reliable connection and sealing, it also reveals significant drawbacks in practical use. Once a traditional threaded connection is fixed to the pipe body, its connection size and form are also determined. In actual applications, the threaded part of the connector becomes the most vulnerable part due to frequent tightening, corrosion, or accidental impact. When the thread is damaged and the connector needs to be replaced, the existing solutions can only discard the entire expensive PTFE composite pipe and connector together, or cut off part of the pipe behind the damaged connector and re-crimp a new connector. The former causes huge material waste and economic losses, while the latter shortens the effective length of the pipeline, and may even lead to the scrapping of the entire pipeline due to insufficient pipeline length. Moreover, the replacement process is cumbersome and requires a long downtime, affecting use. Utility Model Content
[0005] The purpose of this invention is to provide a PTFE composite pipe joint that is easy to replace, so as to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A replaceable polytetrafluoroethylene composite pipe fitting includes: a pipe body, an installation component at the pipe opening of the pipe body, the outer wall of the installation component and the end face of the pipe opening being in tight contact, the installation component being cylindrical and hollow, a fitting body being connected to the side of the installation component away from the pipe body via a connecting assembly, and a fixing mechanism being provided on the side of the installation component close to the pipe body;
[0008] The fixing mechanism includes a core fixedly mounted on the outer wall of the mounting component. The core is inserted into the inside of the tube opening. A locking block is fixedly sleeved on the outer wall of the core. The locking block is frustoconical in shape. The radius of the side of the locking block away from the mounting component is the same as the outer diameter of the core. A slot adapted to the locking block is opened on the inner wall of the tube. The locking block is inserted into the slot. A locking component is provided on the outside of the tube.
[0009] Preferably, the locking assembly includes a cover fixedly mounted on the outer wall of the mounting component. The cover is tubular, and two symmetrically arranged locking plates are provided inside the cover. The locking plates are arc-shaped, and an adjustment assembly and a guide assembly are provided between the locking plates and the cover.
[0010] Preferably, the adjusting assembly includes an adjusting screw that passes through and is threaded onto the outer wall of the cover, a rotating block that is fixedly disposed at the end of the adjusting screw, the rotating block being disposed outside the cover, and the end of the adjusting screw being rotatably connected to the outer wall of the locking plate.
[0011] Preferably, the inner wall of the locking plate is fixedly provided with a plurality of arc-shaped locking strips, and the outer wall of the tube body is provided with a fixing groove adapted to the locking strips, and the locking strips are inserted into the fixing groove.
[0012] Preferably, the guide assembly includes a plurality of sleeve rods fixedly disposed on the outer wall of the locking plate, the sleeve rods being disposed between the locking plate and the cover, and a plurality of connecting rods being slidably disposed on the inner wall of the sleeve rods, the ends of the plurality of connecting rods away from the sleeve rods being fixedly disposed on the inner wall of the cover.
[0013] Preferably, the connecting assembly includes a connector fixedly disposed on the outer wall of the mounting component, a connecting block being threadedly connected to the outer wall of the connector, a fixing element being fixedly disposed on the side of the connecting block away from the mounting component, and the connector body being fixedly disposed on the fixing element.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] By designing the mounting base, consisting of an installation component, a fixing mechanism, and a locking assembly, and the connector body as two separable parts, the mounting base is securely and sealed to the pipe port using the fixing mechanism and locking assembly on the installation component. The connector body is independently mounted on the installation component via a connecting assembly. When only the connector body needs to be replaced, there is no need to disassemble the mounting base or touch the pipe body. Simply operate the connecting assembly to quickly remove the damaged connector body from the installation component for replacement. The operation is extremely simple. By separating the vulnerable connector functional unit from the socket-fixed mounting base unit, individual replacement of the connector is achieved, avoiding material waste and economic losses caused by cutting the pipe body or scrapping an entire section of pipeline when replacing the connector. This greatly improves maintenance efficiency and reduces maintenance costs. Furthermore, the mounting base, through the socket engagement of the core and the locking block and the radial locking of the locking assembly, ensures a connection strength and sealing reliability with the pipe body comparable to traditional fixed connectors, ensuring that the connector can be replaced without sacrificing performance. Attached Figure Description
[0016] Figure 1 This is a perspective view of the present utility model;
[0017] Figure 2 This is a schematic diagram of the fixing mechanism in this utility model;
[0018] Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle;
[0019] Figure 4 This is a schematic diagram of the connection structure between the locking plate and the cover in this utility model;
[0020] Figure 5 This is a schematic diagram of the connection structure between the connector body and the connector head in this utility model;
[0021] In the diagram: 1. Pipe body; 2. Mounting component; 3. Connector; 4. Core; 5. Clamping block; 6. Cover; 7. Locking plate; 8. Adjusting screw; 9. Rotating block; 10. Clamping strip; 11. Sleeve rod; 12. Connecting rod; 13. Connecting block; 14. Fixing component; 15. Connector body. Detailed Implementation
[0022] 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.
[0023] Example 1:
[0024] Please see Figure 1 - Figure 5 As shown, a replaceable polytetrafluoroethylene composite pipe fitting includes: a pipe body 1, an installation part 2 at the pipe opening of the pipe body 1, the outer wall of the installation part 2 and the end face of the pipe opening being in tight contact, the installation part 2 being cylindrical and hollow, the side of the installation part 2 away from the pipe body 1 being connected to the connector body 15 via a connecting assembly, and the side of the installation part 2 near the pipe body 1 being provided with a fixing mechanism.
[0025] The fixing mechanism includes a core 4 fixedly installed on the outer wall of the mounting component 2. The core 4 is inserted into the inside of the pipe opening of the tube body 1. A locking block 5 is fixedly sleeved on the outer wall of the core 4. The locking block 5 is frustoconical in shape. The radius of the side of the locking block 5 away from the mounting component 2 is the same as the outer diameter of the core 4. A slot adapted to the locking block 5 is opened on the inner wall of the tube body 1. The locking block 5 is inserted into the slot. A locking component is provided on the outside of the tube body 1.
[0026] As can be seen from the above, the mounting component 2 achieves initial positioning and sealing with the pipe body 1 through its fixing mechanism on the side near the pipe body 1. The core 4, which is fixed on the outer wall of the mounting component 2, is inserted into the pipe opening of the pipe body 1. Since the inside of the pipe body 1 is a polytetrafluoroethylene liner with a certain degree of elasticity and flexibility, when the frustum-shaped locking block 5, whose cross-sectional size is slightly larger than the inner diameter of the pipe opening, is inserted together with the core 4, the inner liner wall will undergo temporary elastic deformation, allowing the locking block 5 to be squeezed in and pass through smoothly. When the locking block 5 reaches the pre-opened slot position on the inner wall of the pipe body 1, the deformed inner liner wall will partially rebound under the action of the material's elastic restoring force, so that the locking block 5 is embedded in the matching slot. The frustum-shaped inclined structure facilitates the guidance and compression of the pipe wall during insertion, and can generate a stronger locking effect during axial pull-out. Its geometry is used to achieve axial limiting and initial radial sealing.
[0027] Specifically, regarding the aforementioned locking assembly, the locking assembly includes a cover 6 fixedly mounted on the outer wall of the mounting component 2. The cover 6 is tubular in shape, and two symmetrically arranged locking plates 7 are provided inside the cover 6. The locking plates 7 are arc-shaped, and an adjustment assembly and a guide assembly are provided between the locking plates 7 and the cover 6.
[0028] Multiple arc-shaped locking strips 10 are fixedly installed on the inner side wall of the locking plate 7, and a fixing groove adapted to the locking strips 10 is opened on the outer side wall of the tube body 1, and the locking strips 10 are inserted into the fixing groove.
[0029] The adjustment assembly includes an adjustment screw 8 that passes through and is threaded onto the outer wall of the cover 6. A rotating block 9 is fixedly provided at the end of the adjustment screw 8. The rotating block 9 is located outside the cover 6. The end of the adjustment screw 8 is rotatably connected to the outer wall of the locking plate 7.
[0030] The guide assembly includes multiple sleeve rods 11 fixedly disposed on the outer wall of the locking plate 7. The sleeve rods 11 are disposed between the locking plate 7 and the cover 6. Multiple connecting rods 12 are slidably disposed on the inner wall of the sleeve rods 11. The ends of the multiple connecting rods 12 away from the sleeve rods 11 are fixedly disposed on the inner wall of the cover 6.
[0031] As can be seen from the above, the arc-shaped locking plates 7 symmetrically arranged inside the cover 6 fixed on the mounting part 2 can be radially opened and closed by adjusting the component. Twisting the rotating block 9 drives the adjusting screw 8 to rotate. Since the screw is threadedly engaged with the cover 6, its end is rotatably connected to the locking plate 7, thereby converting the rotational motion of the screw into the linear motion of the locking plate 7.
[0032] The sleeve rod 11 fixed on the locking plate 7 slides along the connecting rod 12 fixed on the cover 6, ensuring that the locking plate 7 can only move smoothly along the predetermined trajectory, preventing deviation or jamming, and making the locking force evenly applied. The arc-shaped locking strip 10 on the inner side of the locking plate 7 is then embedded into the fixing groove on the outer wall of the pipe body 1, realizing the radial locking of the mounting part 2 and the pipe body 1, which greatly enhances the joint's ability to resist fluid pressure impact and pipe pull-out.
[0033] Example 2:
[0034] The connecting assembly includes a connector 3 fixedly mounted on the outer wall of the mounting component 2, a connecting block 13 threadedly connected to the outer wall of the connector 3, a fixing component 14 fixedly mounted on the side of the connecting block 13 away from the mounting component 2, and a connector body 15 fixedly mounted on the fixing component 14.
[0035] As can be seen from the above, the connecting assembly enables the quick and independent replacement of the connector body 15. The connector 3, which is fixed on the mounting part 2, is connected to the connecting block 13 through its external thread, while the connector body 15 is fixed on the fixing part 14 on the other side of the connecting block 13. When it is necessary to replace the connector body 15 that has failed due to thread damage or other reasons, the maintenance personnel do not need to disassemble the entire mounting base (i.e., mounting part 2, fixing mechanism and locking assembly). They only need to use a tool to unscrew the connecting block 13 to remove the old connector body 15 together with the connecting block 13 and the fixing part 14. Then, the new pre-installed connector assembly can be installed. This design separates the vulnerable connector functional unit from the mounting base unit fixed to the pipe body 1, making the operation extremely simple and quick, and significantly reducing downtime and maintenance costs.
[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A replaceable polytetrafluoroethylene composite pipe fitting, characterized in that, include: The pipe body (1) has an installation part (2) at the pipe opening. The outer wall of the installation part (2) and the end face of the pipe opening are in close contact. The installation part (2) is cylindrical and hollow. The side of the installation part (2) away from the pipe body (1) is connected to the connector body (15) through the connecting component. The side of the installation part (2) close to the pipe body (1) has a fixing mechanism. The fixing mechanism includes a core (4) fixedly installed on the outer wall of the mounting component (2). The core (4) is inserted into the opening of the tube (1). A locking block (5) is fixedly sleeved on the outer wall of the core (4). The locking block (5) is frustoconical in shape. The radius of the side of the locking block (5) away from the mounting component (2) is the same as the outer diameter of the core (4). A slot adapted to the locking block (5) is opened on the inner wall of the tube (1). The locking block (5) is inserted into the slot. A locking component is provided on the outside of the tube (1).
2. The easily replaceable polytetrafluoroethylene composite pipe joint according to claim 1, characterized in that: The locking assembly includes a cover (6) fixedly mounted on the outer wall of the mounting component (2). The cover (6) is tubular. Inside the cover (6) are two symmetrically arranged locking plates (7). The locking plates (7) are arc-shaped. An adjustment assembly and a guide assembly are provided between the locking plates (7) and the cover (6).
3. The easily replaceable polytetrafluoroethylene composite pipe joint according to claim 2, characterized in that: The adjustment assembly includes an adjustment screw (8) that passes through and is threaded onto the outer wall of the cover (6). A rotating block (9) is fixedly provided at the end of the adjustment screw (8). The rotating block (9) is located outside the cover (6). The end of the adjustment screw (8) is rotatably connected to the outer wall of the locking plate (7).
4. The easily replaceable polytetrafluoroethylene composite pipe joint according to claim 2, characterized in that: The inner wall of the locking plate (7) is fixedly provided with a plurality of arc-shaped locking strips (10), and the outer wall of the tube body (1) is provided with a fixing groove that matches the locking strips (10), and the locking strips (10) are inserted into the fixing groove.
5. The easily replaceable polytetrafluoroethylene composite pipe joint according to claim 2, characterized in that: The guide assembly includes a plurality of sleeve rods (11) fixedly disposed on the outer side wall of the locking plate (7). The sleeve rods (11) are disposed between the locking plate (7) and the cover (6). A plurality of connecting rods (12) are slidably disposed on the inner side wall of the sleeve rods (11). The ends of the plurality of connecting rods (12) away from the sleeve rods (11) are fixedly disposed on the inner side wall of the cover (6).
6. The easily replaceable polytetrafluoroethylene composite pipe joint according to claim 1, characterized in that: The connecting assembly includes a connector (3) fixedly disposed on the outer wall of the mounting component (2), a connecting block (13) threadedly connected to the outer wall of the connector (3), a fixing component (14) fixedly disposed on the side of the connecting block (13) away from the mounting component (2), and the connector body (15) fixedly disposed on the fixing component (14).