Movable joint of plastic rod metal cap

Abstract

The utility model relates to the technical field of movable joints, and discloses a movable joint of a plastic rod metal cap, which comprises a connecting pipe and a plastic rod, one end of the plastic rod is fixedly connected with a joint, external threads are arranged on the outer wall of the joint, a sealing assembly is arranged on the outer wall of the joint, and the sealing assembly comprises a first sealing gasket. The inner portion of the first sealing washer is fixedly connected to the outer wall of the connector, a metal cap body is arranged on the outer wall of the connector, first internal threads matched with the external threads are arranged in the metal cap body, a second sealing washer is fixedly connected to one side of the metal cap body, and the first sealing washer makes contact with the plastic rod and the metal cap body. According to the utility model, the sealing washer I is arranged on the joint, and then the joint is screwed and connected with the metal cap body through the external thread and the internal thread, in the process, the sealing washer I is compressed to form effective sealing, and meanwhile, the sealing washer II is positioned at the port of the metal cap body to further enhance the sealing effect, so that the stable sealing effect is realized.

Description

Technical Field

[0001] This utility model relates to the field of union technology, and in particular to a union with a plastic rod and metal cap. Background Technology

[0002] In water supply and drainage engineering, gas transmission, chemical fluid pipelines, and hydraulic and pneumatic systems of mechanical equipment, the reliability and sealing performance of pipeline connection components play a decisive role. Plastic rod metal caps, as an important component of unions, are widely used in various pipeline systems for quick connection and sealing. With the increasing demands for safety and durability in industrial production and civil facilities, higher standards are being placed on the sealing performance, connection strength, and ease of installation of unions. A plastic rod metal cap union that can achieve efficient sealing and stable connection has become a key requirement for ensuring the stable operation of pipeline systems.

[0003] Existing pipe fittings typically achieve sealing by tightly interlocking the threads. This method involves increasing the tightening force of the threads to compress the pipe contact surface, reducing gaps and preventing media leakage. However, this method is greatly affected by the thread machining accuracy and installation force.

[0004] However, existing plastic rod metal cap unions have problems with poor sealing performance and are prone to media leakage. In practical applications, the sealing structure of traditional unions cannot adapt to complex and changing working conditions. Once the threads are worn or improperly installed, leakage is very likely to occur. Under long-term vibration or pressure fluctuations, the single sealing method of traditional unions is difficult to maintain a stable sealing state. Frequent leakage problems increase maintenance costs. Therefore, a plastic rod metal cap union is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a metal cap fitting for a plastic rod, which aims to improve the problem that traditional fittings in the prior art cannot maintain a stable sealing state under long-term vibration or pressure fluctuations due to the difficulty of a single sealing method.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A flexible connector for a plastic rod and metal cap includes a connecting tube and a plastic rod, one end of which is fixedly connected to a connector, the outer wall of which is provided with an external thread, and a sealing component is provided on the outer wall of which;

[0008] The sealing assembly includes a first sealing washer, which is internally fixedly connected to the outer wall of the connector. The outer wall of the connector is provided with a metal cap, and the metal cap is internally provided with an internal thread adapted to the external thread. A second sealing washer is fixedly connected to one side of the metal cap. The first sealing washer is in contact with the plastic rod and the metal cap. A fastening assembly is provided inside the metal cap.

[0009] As a further description of the above technical solution:

[0010] The fastening assembly includes a pin and a screw hole inside the metal cap body, the pin being slidably connected inside the screw hole.

[0011] As a further description of the above technical solution:

[0012] The connector has a through hole inside, and the pin is slidably connected inside the through hole.

[0013] As a further description of the above technical solution:

[0014] One end of the pin is fixedly connected to a screw, and the screw is threaded into the screw hole.

[0015] As a further description of the above technical solution:

[0016] One end of the screw is fixedly connected to a rotating rod.

[0017] As a further description of the above technical solution:

[0018] The connector has an internal thread, and the outer wall of the connecting pipe is fixedly connected with an anti-slip strip.

[0019] As a further description of the above technical solution:

[0020] The inner wall of the connecting pipe and the plastic rod is provided with a hydrophobic layer, which is made of polytetrafluoroethylene coating, and can effectively prevent moisture adhesion and corrosion.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, by installing a sealing washer on the connector, and then connecting the connector and the metal cap body by screwing them together with external and internal threads, the sealing washer is compressed to form an effective seal during this process. At the same time, the sealing washer is located at the port of the metal cap body to further enhance the sealing effect, thus achieving a good and stable sealing effect. This solves the problem that traditional unions cannot maintain a stable sealing state under long-term vibration or pressure fluctuations with a single sealing method, thereby improving the service life of the union.

[0023] 2. In this utility model, after the metal cap and the connector are fully connected, the screw is rotated by rotating the rotating rod, so that the pin passes through the screw hole and the through hole, further tightening the connection between the metal cap and the connector. In addition, the hydrophobic layer on the inner wall of the metal cap prevents moisture from adhering and avoids internal corrosion, thus achieving a stable connection of the live joint. This solves the problem that traditional live joint connections are prone to loosening after being subjected to external impact or long-term use, resulting in unstable connections, thereby improving the connection stability of the live joint. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of a flexible joint for a plastic rod metal cap proposed in this utility model;

[0025] Figure 2 This is a schematic diagram of the hydrophobic layer structure of the live joint of a plastic rod metal cap proposed in this utility model;

[0026] Figure 3 This is a schematic diagram of the joint structure of a flexible joint for a plastic rod metal cap proposed in this utility model;

[0027] Figure 4 This is a schematic diagram of the internal structure of a flexible connector for a plastic rod metal cap proposed in this utility model.

[0028] Figure 5 This is a schematic diagram of the pin structure of the live joint of a plastic rod metal cap proposed in this utility model.

[0029] Legend:

[0030] 1. Connecting pipe; 2. Plastic rod; 3. Anti-slip strip; 4. Connector; 5. External thread; 6. Sealing washer one; 7. Metal cap; 8. Internal thread one; 9. Sealing washer two; 10. Hydrophobic layer; 11. Internal thread two; 12. Through hole; 13. Screw hole; 14. Pin; 15. Screw; 16. Rotating rod. Detailed Implementation

[0031] 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.

[0032] Reference Figures 1-3The present invention provides an embodiment of a plastic rod metal cap fitting, comprising a connecting tube 1 and a plastic rod 2, one end of the plastic rod 2 being fixedly connected to a connector 4, the outer wall of the connector 4 being provided with an external thread 5 for screwing into the metal cap body 7 to achieve a firm fixation, and the outer wall of the connector 4 being provided with a sealing component.

[0033] The sealing assembly includes a sealing washer 6, which is internally fixed to the outer wall of the connector 4. A metal cap 7 is provided on the outer wall of the connector 4. The metal cap 7 has an internal thread 8 that matches the external thread 5, allowing the connector 4 to be tightly connected to the metal cap 7 by screwing, thus forming a reliable sealing and fixing effect. A second sealing washer 9 is fixedly connected to one side of the metal cap 7, providing additional sealing for the connection. The sealing washer 6 is in contact with the plastic rod 2 and the metal cap 7. A fastening component is provided inside the metal cap 7. The connector 4 has an internal thread 11 for connecting with other pipes or fittings, enhancing the flexibility and adaptability of the connector 4. An anti-slip strip 3 is fixedly connected to the outer wall of the connecting pipe 1.

[0034] Reference Figure 4 and Figure 5 The fastening assembly includes a pin 14 and a screw hole 13 inside the metal cap 7. The pin 14 is slidably connected inside the screw hole 13. The connector 4 has a through hole 12 inside, and the pin 14 is slidably connected inside the through hole 12. One end of the pin 14 is fixedly connected to a screw 15, which is threaded into the screw hole 13. The screw 15 is tightly connected to the screw hole 13 by the thread, ensuring that the pin 14 will not loosen or fall off. One end of the screw 15 is fixedly connected to a rotating rod 16. The design of the rotating rod 16 makes it easy for the operator to adjust the screw 15 during installation to achieve the best fastening effect. The inner walls of the connecting tube 1 and the plastic rod 2 are provided with a hydrophobic layer 10. The hydrophobic layer 10 is made of polytetrafluoroethylene coating, which can effectively prevent moisture adhesion and corrosion.

[0035] Working principle: When using the union, first install the sealing washer 6 on the union 4, then connect the union 4 and the metal cap 7 by screwing on the external thread 5 and the internal thread 8. The sealing washer 9 is located at the port of the metal cap 7. When connected with other pipe components, it further enhances the sealing effect. During this process, the sealing washer 6 is compressed to form an effective seal.

[0036] After the metal cap 7 and the connector 4 are fully connected, the screw 15 is rotated by rotating the rotating rod 16, so that the pin 14 passes through the screw hole 13 and the through hole 12, further tightening the connection between the metal cap 7 and the connector 4 and ensuring the stability of the connection. The hydrophobic layer 10 on the inner wall of the metal cap 7 prevents moisture from adhering and avoids internal corrosion. When disassembly is required, the rotating rod 16 is rotated in the opposite direction to loosen the screw 15, and then the metal cap 7 can be unscrewed. The entire connector achieves a stable connection effect through the synergistic action of its components.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A flexible connector for a plastic rod and metal cap, comprising a connecting tube (1) and a plastic rod (2), characterized in that: One end of the plastic rod (2) is fixedly connected to a connector (4), the outer wall of the connector (4) is provided with an external thread (5), and the outer wall of the connector (4) is provided with a sealing component; The sealing assembly includes a sealing washer (6), which is fixedly connected to the outer wall of the connector (4). A metal cap (7) is provided on the outer wall of the connector (4). An internal thread (8) adapted to the external thread (5) is provided inside the metal cap (7). A sealing washer (9) is fixedly connected to one side of the metal cap (7). The sealing washer (6) is in contact with the plastic rod (2) and the metal cap (7). A fastening assembly is provided inside the metal cap (7).

2. The swivel joint of a plastic rod metal cap according to claim 1, characterized in that: The fastening assembly includes a pin (14) and a screw hole (13) opened inside the metal cap (7), wherein the pin (14) is slidably connected inside the screw hole (13).

3. The swivel joint of a plastic rod metal cap according to claim 2, characterized in that: The connector (4) has a through hole (12) inside, and the pin (14) is slidably connected inside the through hole (12).

4. The swivel joint of a plastic rod metal cap according to claim 3, characterized in that: One end of the pin (14) is fixedly connected to a screw (15), and the screw (15) is threaded into the screw hole (13).

5. The swivel joint of a plastic rod metal cap according to claim 4, characterized in that: One end of the screw (15) is fixedly connected to a rotating rod (16).

6. The swivel joint of a plastic rod metal cap according to claim 1, characterized in that: The connector (4) has an internal thread (11) inside, and the outer wall of the connecting pipe (1) is fixedly connected with an anti-slip strip (3).

7. The swivel joint of a plastic rod metal cap according to claim 1, characterized in that: The inner walls of the connecting pipe (1) and the plastic rod (2) are provided with a hydrophobic layer (10), which is made of polytetrafluoroethylene coating, and can effectively prevent moisture adhesion and corrosion.

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