Loose joint elbow of plastic rod metal cap
By combining the plastic core with the nut and using a reinforcing rib design, the problem of sealing failure of the plastic rod metal cap elbow under vibration or pressure fluctuations is solved, thus improving sealing performance and structural stability and enhancing the strength of the plastic rod.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-15
- Publication Date
- 2026-03-17
AI Technical Summary
Existing plastic rod metal cap union elbows are prone to gasket displacement under pipeline system vibration or pressure fluctuations, leading to seal failure and affecting the normal operation of the pipeline system.
It adopts a combination structure of plastic core and nut, combined with O-ring, spring and reinforcing rib design. The O-ring is tightly fitted by tightening the nut, and the reinforcing rib enhances the bending and torsional resistance of the plastic rod and prevents displacement.
It improves sealing performance and structural stability, ensuring that the sealing effect does not fail under vibration and pressure fluctuations, and enhances the overall strength and torsional resistance of the plastic rod.
Smart Images
Figure CN224003363U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of flexible elbow technology, and in particular to a flexible elbow with a plastic rod and metal cap. Background Technology
[0002] In modern piping systems, union elbows are key components for achieving pipe turning connections and are widely used in water supply and drainage, HVAC, gas and other fields. Union elbows with plastic rods and metal caps are favored in many pipe connection scenarios due to their cost advantages and good applicability. The reliability and sealing of their connection directly affect the normal operation and service life of the entire piping system.
[0003] Currently, common plastic rod metal cap union elbows mainly use a simple threaded connection to connect to external pipes. The sealing structure is mostly a single sealing gasket. In this structure, by tightening the nut onto the plastic rod metal cap, the sealing gasket deforms under the pressure of the nut and the pipe, thereby filling the gap and achieving a seal to prevent fluid leakage.
[0004] Existing plastic-coated metal cap union elbows are prone to sealing gasket displacement during actual use when the pipeline system is subjected to vibration, pressure fluctuations, or wear of components due to long-term use. This can lead to a failure of the seal, resulting in fluid leakage and affecting the normal operation of the pipeline system. Therefore, a new type of plastic-coated metal cap union elbow is proposed to solve the above problems. Utility Model Content
[0005] To overcome the above deficiencies, this utility model provides a union elbow with a plastic rod and metal cap, which aims to improve the problem in the prior art where the sealing gasket is prone to displacement when the pipeline system is subjected to vibration, pressure fluctuation, or wear of components due to long-term use, resulting in sealing failure and affecting the normal operation of the pipeline system.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A flexible elbow for a plastic rod metal cap includes a plastic rod body, a plastic core fixedly connected to one end of the plastic rod body, a nut slidably connected to the side wall of the plastic core, the nut having internal threads, a sealing component provided on the side wall of the plastic core, and a reinforcing component provided on the side wall of the plastic rod body.
[0008] The sealing assembly includes an O-ring, the sidewall of which is slidably connected to the inside of the nut, and an mounting sleeve is fixedly connected to the sidewall of the plastic core. A spring is provided inside the mounting sleeve, and a push block is slidably connected inside the mounting sleeve. The upper surface of the push block is attached to the lower surface of the O-ring.
[0009] As a further description of the above technical solution:
[0010] The reinforcing component includes a reinforcing rib, one sidewall of which is fixedly connected to the sidewall of the plastic rod.
[0011] As a further description of the above technical solution:
[0012] One end of the spring is fixedly connected inside the mounting sleeve, and the other end of the spring is fixedly connected to the lower surface of the push block. The sidewall of the O-ring is fitted inside the nut.
[0013] As a further description of the above technical solution:
[0014] The side wall of the plastic rod is fixedly connected with a second reinforcing rib, which is arranged in a ring on the side wall of the plastic rod.
[0015] As a further description of the above technical solution:
[0016] The reinforcing ribs are arranged symmetrically on the side wall of the plastic rod.
[0017] As a further description of the above technical solution:
[0018] The second reinforcing rib has anti-slip textures inside to enhance friction, and the anti-slip textures are arranged along the axial direction of the second reinforcing rib.
[0019] As a further description of the above technical solution:
[0020] The plastic core sidewall is fixedly connected with a limiting ring to restrict the sliding range of the nut.
[0021] This utility model has the following beneficial effects:
[0022] 1. In this utility model, when the nut is rotated and tightened with the external pipe, the corresponding pipe will squeeze the O-ring, making the O-ring tightly fit against the inner wall of the nut to form a seal. The spring continuously provides an upward thrust to the push block, ensuring that the O-ring always maintains a good sealing state and maintains the sealing effect. This solves the problem that when the pipe system is subjected to vibration, pressure fluctuation, or wear of components due to long-term use, the sealing gasket is prone to displacement and cannot maintain a tight fit, resulting in sealing failure and affecting the normal operation of the pipe system. The above structure improves the sealing performance of the equipment.
[0023] 2. In this utility model, the first reinforcing rib can enhance the bending strength of the plastic rod in a specific direction and disperse the stress concentration under the action of external force. The second reinforcing rib can not only enhance the torsional strength of the plastic rod, but also increase the friction when in contact with the outside through the anti-slip texture set along the axial direction inside, further improving the structural stability, preventing rotation or displacement caused by external force, and thus improving the overall strength of the plastic rod. Attached Figure Description
[0024] Figure 1 This is a three-dimensional schematic diagram of a flexible elbow for a plastic rod metal cap proposed in this utility model.
[0025] Figure 2 This is a schematic diagram of the internal structure of the nut of the union elbow of the plastic rod metal cap proposed in this utility model;
[0026] Figure 3 This is a schematic diagram of the mounting sleeve for the flexible elbow of a plastic rod metal cap proposed in this utility model;
[0027] Figure 4 This is a schematic diagram of the reinforcing rib two of the flexible elbow of the plastic rod metal cap proposed in this utility model;
[0028] Figure 5 for Figure 4 Enlarged view of point A in the middle.
[0029] Legend:
[0030] 1. Plastic rod body; 2. Plastic core; 3. Nut; 4. Thread; 5. O-ring; 6. Mounting sleeve; 7. Spring; 8. Push block; 9. Reinforcing rib one; 10. Reinforcing rib two; 11. Anti-slip texture; 12. Limiting ring. 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 1-3This utility model provides an embodiment of a union elbow with a plastic rod and metal cap, comprising a plastic rod body 1, with a plastic core 2 fixedly connected to one end of the plastic rod body 1. The plastic core 2 prevents direct contact between the metal and water, thus serving an environmental protection purpose and effectively reducing product costs by replacing the metal core. A nut 3 is slidably connected to the side wall of the plastic core 2, and the nut 3 has a thread 4 inside for connecting to an external pipe, achieving a stable connection between the union elbow and the pipe. A sealing component is provided on the side wall of the plastic core 2, and a reinforcing component is provided on the side wall of the plastic rod body 1. The sealing component includes an O-ring 5, which is made of rubber and functions as a seal. The side wall of the O-ring 5 is slidably connected inside the nut 3 to prevent... To prevent fluid leakage and achieve a sealing effect, a mounting sleeve 6 is fixedly connected to the side wall of the plastic core 2. A spring 7 is installed inside the mounting sleeve 6. One end of the spring 7 is fixedly connected inside the mounting sleeve 6, and the other end of the spring 7 is fixedly connected to the lower surface of the push block 8. The spring 7 is used to provide a continuous elastic thrust to the push block 8. The push block 8 is slidably connected inside the mounting sleeve 6. The upper surface of the push block 8 is attached to the lower surface of the O-ring 5. The push block 8 moves up and down in cooperation with the spring 7, which achieves the effect of pushing the O-ring 5 to fit tightly against the inner wall of the nut 3, thereby enhancing the sealing performance. A limiting ring 12 is fixedly connected to the side wall of the plastic core 2 to limit the sliding range of the nut 3. The limiting ring 12 is used to prevent the nut 3 from sliding excessively and detaching from the plastic core 2.
[0033] Reference Figures 4-5 The reinforcing components include reinforcing rib 9, which enhances the bending strength of the plastic rod 1 in a specific direction, achieving the effect of dispersing external forces and reducing stress concentration. Reinforcing rib 9 is fixedly connected to the side wall of the plastic rod 1, providing stable support. Reinforcing rib 10 is also fixedly connected to the side wall of the plastic rod 1, enhancing its torsional resistance and preventing deformation of the elbow joint under torque. It also reinforces the circumference of the plastic rod 1. Reinforcing rib 10 is arranged in a ring on the side wall of the plastic rod 1, evenly dispersing external forces. External forces in the same direction further enhance the overall structural strength. The first reinforcing rib 9 is symmetrically arranged on the side wall of the plastic rod body 1, and works with the second reinforcing rib 10 to reinforce the plastic rod body 1 from different dimensions, thereby achieving the effect of comprehensively improving the structural strength of the union elbow. The second reinforcing rib 10 has anti-slip texture 11 inside to enhance friction. The anti-slip texture 11 is set along the axial direction of the second reinforcing rib 10. The anti-slip texture 11 is used to increase the friction when the second reinforcing rib 10 contacts the outside, preventing the union elbow from rotating or displacing when subjected to external forces, and playing the role of stabilizing the position of the union elbow.
[0034] Working principle: When connecting pipes, the external pipe is screwed into the nut 3 using the internal thread 4, thus connecting with the union elbow. When the nut 3 rotates and tightens with the external pipe, the push block 8 pushes the O-ring 5 upward under the action of the spring 7. The spring 7 continuously provides upward thrust, making the O-ring 5 tightly fit against the inner wall of the nut 3, forming a reliable seal. Even if there is vibration or pressure fluctuation in the pipeline system, the elastic deformation of the spring 7 can allow the push block 8 to adjust the position of the O-ring 5 in time to maintain the sealing effect. The reinforcing ribs 1 and 9 are symmetrically fixed on the side wall of the plastic rod body 1, which can effectively disperse external forces and improve the bending resistance of the plastic rod body 1. The reinforcing ribs 2 and 10 are arranged in a ring on the side wall of the plastic rod body 1, which not only enhances the anti-torsion performance, but also increases the friction with the external contact by the anti-slip texture 11 set along the axial direction inside, preventing unnecessary rotation or displacement of the union elbow under force, and further strengthening the overall stability.
[0035] 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 plastic socketed bend for a metal cap of a plastic pipe, comprising a plastic body (1), characterized in that: The plastic rod body (1) is fixedly connected with a plastic core (2) at one end, the plastic core (2) is slidably connected with a nut (3) on the side wall, the nut (3) is internally provided with a thread (4), the plastic core (2) is provided with a sealing assembly on the side wall, and the plastic rod body (1) is provided with a reinforcing assembly on the side wall. The sealing assembly comprises an O-shaped ring (5), the O-shaped ring (5) is slidably connected in the nut (3), the plastic core (2) is fixedly connected with a mounting sleeve (6) on the side wall, the mounting sleeve (6) is internally provided with a spring (7), the mounting sleeve (6) is slidably connected with a push block (8) in the inside, and the push block (8) is attached to the lower surface of the O-shaped ring (5).
2. A malleable iron socketed bend for plastic pipe according to claim 1 wherein: The reinforcing assembly comprises a reinforcing rib one (9), and the reinforcing rib one (9) is fixedly connected on the side wall of the plastic rod body (1).
3. A malleable iron socketed bend for plastic pipe according to claim 1 wherein: One end of the spring (7) is fixedly connected in the mounting sleeve (6), the other end of the spring (7) is fixedly connected to the lower surface of the push block (8), and the O-shaped ring (5) is attached to the inside of the nut (3).
4. A malleable iron socketed bend for plastic pipe according to claim 2 wherein: The plastic rod body (1) is fixedly connected with a reinforcing rib two (10) on the side wall, and the reinforcing rib two (10) is arranged in a ring shape on the side wall of the plastic rod body (1).
5. A malleable iron socketed bend for plastic pipe according to claim 4 wherein: The reinforcing rib one (9) is arranged in a symmetrical manner on the side wall of the plastic rod body (1).
6. A malleable iron socketed bend for plastic pipe according to claim 4 wherein: The reinforcing rib two (10) is internally provided with anti-skid lines (11) for enhancing friction, and the anti-skid lines (11) are arranged along the axial direction of the reinforcing rib two (10).
7. A malleable iron socketed bend for plastic pipe according to claim 1 wherein: The plastic core (2) is fixedly connected with a limiting ring (12) for limiting the sliding range of the nut (3).