Movable screwed joint

Abstract

The utility model relates to the technical field of water pipe screwed joints, in particular to a movable screwed joint which comprises a male joint and a female joint, one end of the male joint is fixedly connected with a ball seat, one end of the female joint is fixedly connected with a ball head, the ball seat is movably connected with the ball head, and threaded sections are formed at the axial outermost ends of the male joint and the female joint. A water pressure compensation ring is arranged at the axial inner end of the threaded section, a pressure reduction cavity inlet is formed in the axial innermost end of the male connector, a plurality of buffer sealing units are arranged at the axial innermost end of the female connector, and the pressure reduction cavity inlet is connected with the buffer sealing units through a ball seat and a ball head. Multi-directional angle adjustment is achieved through the ball head and the ball seat, fluid pressure is converted into radial sealing force through the conical water pressure compensation ring, the pressure reduction function of the buffer sealing unit and the self-repairing function of the composite coating on the threaded section are combined, and on the premise that flexibility is guaranteed, high-pressure sealing reliability and long-acting anti-corrosion capacity are remarkably improved.

Description

Technical Field

[0001] This utility model mainly relates to the field of water pipe threaded joint technology, specifically a movable threaded joint. Background Technology

[0002] Threaded fittings are a common type of pipe connector, used to connect two pipe sections together. In irrigation scenarios, due to the numerous and distant irrigation points, threaded fittings are frequently used to connect two adjacent pipes. Traditional threaded fittings typically use a fixed connection, preventing the pipes at both ends from rotating or adjusting their angle.

[0003] Existing technology divides threaded joints into male and female joints, using a ball seat and ball head between the two joints to meet the needs of movement, thus allowing for adjustment of the pipe angle. However, it relies solely on threaded sealing, resulting in poor sealing performance. Under high water pressure, leakage is prone to occur from the threaded area, and the threads are also prone to loosening and falling off over time. Utility Model Content

[0004] The purpose of this invention is to provide a movable threaded joint to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a movable threaded joint, including a male joint and a female joint, one end of the male joint is fixedly connected to a ball seat, one end of the female joint is fixedly connected to a ball head, the ball seat and the ball head are movably connected, a threaded segment is formed on the outermost axial end of the male joint and the female joint, a water pressure compensation ring is provided on the innermost axial end of the threaded segment, a pressure reducing chamber inlet is formed on the innermost axial end of the male joint, and the innermost axial end of the female joint has multiple buffer sealing units, the pressure reducing chamber inlet is connected to the ball head via the ball seat and the buffer sealing units.

[0006] Preferably, the water pressure compensation ring is made of highly elastic rubber material. The two ends of the water pressure compensation ring have different diameters, with the outer diameter being longer than the inner diameter. The larger diameter is fixedly connected to the inner wall of the connector, while multiple springs are provided between the smaller diameter and the inner wall of the connector.

[0007] Furthermore, a flow limiting element is also provided on the female connector at the position facing inward relative to the water pressure compensation ring. The outer wall of the flow limiting element is connected and fixed to the inner wall of the female connector. The inner two ends of the inner wall of the flow limiting element have different ring diameters. The inner diameter of the inner end of the flow limiting element is longer than the inner diameter of the outer end of the flow limiting element, and the inner diameter of the outer end of the flow limiting element does not exceed the inner diameter of the inner end of the water pressure compensation ring.

[0008] Preferably, the threaded segment includes a base layer, a chemical compensation layer, and a physical compensation layer stacked sequentially from the outside to the inside in a radial direction, wherein the base layer is made of the same material as the joint in which it is located.

[0009] Furthermore, the chemical compensation layer is a microporous Cu-Sn-Zn alloy, and corrosion inhibitors are stored in its micropores.

[0010] Furthermore, the physical compensation layer is an epoxy resin with dispersed polytetrafluoroethylene particles.

[0011] Preferably, the buffer sealing unit is a nitrile rubber protrusion, and its inner wall forms an arc-shaped pressure relief cavity. Multiple buffer sealing units are equidistantly arranged circumferentially and are engaged with the ball head seal.

[0012] Preferably, a water pressure sensor is installed inside the female connector.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] The movable connection structure between the ball seat and the ball head allows the male and female connectors to freely deflect at different angles, meeting the flexible adjustment needs of irrigation pipelines. At the same time, a tapered water pressure compensation ring and spring are installed at the end of the threaded section. The water pressure drives the radial expansion of the smaller diameter end of the compensation ring, automatically enhancing the sealing force and preventing leakage caused by vibration or water pressure fluctuations. Combined with the pressure reduction design of the buffer sealing unit, the impact of water flow is further dispersed, ensuring that the structural connection remains stable and sealed under high pressure.

[0015] By employing a composite coating structure of base layer-chemical compensation layer-physical compensation layer in the threaded section, corrosion inhibitors are stored within the micropores of the chemical compensation layer and released upon contact with water pressure to repair microscopic corrosion. The polytetrafluoroethylene / epoxy resin in the physical compensation layer self-heals polymer cracks, achieving a dual compensation mechanism that enhances the corrosion resistance and wear resistance of the threaded section. A flow-limiting component, in conjunction with a water pressure compensation ring, optimizes the flow channel cross-section, suppressing turbulent erosion of the sealing surface. Meanwhile, a water pressure sensor monitors the sealing status in real time, forming a full-cycle protection chain of "dynamic sealing-corrosion repair-condition early warning," extending the joint's lifespan.

[0016] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0017] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of the present invention and other related contents, and should not be considered as limitations on the present invention.

[0018] In the accompanying drawings of the instruction manual:

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is an exploded view of the overall structure of this utility model;

[0021] Figure 3 This is a side sectional view of the male connector structure of this utility model;

[0022] Figure 4 This is a side sectional view of the female connector structure of this utility model;

[0023] Figure 5 This is a partial side sectional view of the threaded section of this utility model;

[0024] Figure label:

[0025] 1. Male connector; 11. Pressure reducing chamber inlet; 2. Female connector; 21. Buffer sealing unit; 22. Water pressure sensor; 23. Flow limiting component; 3. Ball seat; 4. Ball head; 5. Water pressure compensation ring; 6. Spring component; 7. Threaded section; 71. Base layer; 72. Chemical compensation layer; 73. Physical compensation layer. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0027] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] like Figures 1 to 5 As shown, a movable threaded connector includes a male connector 1 and a female connector 2. A ball seat 3 is fixedly connected to the right side of the male connector 1, and a ball head 4 is fixedly connected to the left side of the female connector 2. The ball seat 3 and the ball head 4 are movably connected, so that the female connector 2 can rotate relative to the male connector 1 to adjust the angle. A threaded section 7 is formed on the outermost axial ends (i.e., the leftmost end of the male connector and the rightmost end of the female connector) of the male connector 1 and the female connector 2. A water pressure compensation ring 5 is provided on the inner axial end of the threaded section 7. A pressure reducing chamber inlet 11 is formed on the innermost axial end of the male connector 1. A plurality of buffer sealing units 21 are provided on the innermost axial end of the female connector 2. The pressure reducing chamber inlet 11 is connected to the buffer sealing units 21 via the ball seat 3 and the ball head 4.

[0029] Male connector 1 is connected to the inlet pipe via threaded section 7, and female connector 2 is connected to the outlet pipe via threaded section 7.

[0030] The water pressure compensation ring 5 is made of highly elastic rubber. The water pressure compensation ring 5 is a conical ring with different diameters at both ends along the axis. Its outer diameter is longer than its inner diameter, and the larger diameter is fixedly connected to the inner wall of the joint. Multiple springs 6 are provided between the smaller diameter and the inner wall of the joint. The smaller diameter is driven by water pressure to expand radially at one end of the water pressure compensation ring 5, which automatically enhances the sealing force and prevents leakage from the joint due to vibration or water pressure fluctuations.

[0031] A flow limiting element 23 is also provided on the female connector 2 at the inward position relative to the water pressure compensation ring 5. The outer wall of the flow limiting element 23 is connected and fixed to the inner wall of the female connector 2. The inner two ends of the inner wall of the flow limiting element 23 have different ring diameters. The inner diameter of the inner end of the flow limiting element 23 is longer than the inner diameter of the outer end of the flow limiting element 23, and the inner diameter of the outer end of the flow limiting element 23 does not exceed the inner diameter of the inner end of the water pressure compensation ring 5. The flow limiting element 23 works in conjunction with the water pressure compensation ring 5 to optimize the flow channel cross section, suppress the erosion of the spring element 6 by turbulence, and improve the durability of the spring element 6.

[0032] The threaded section 7 includes a base layer 71, a chemical compensation layer 72, and a physical compensation layer 73, which are stacked in a radial direction from the outside to the inside, wherein the base layer 71 is made of the same material as the joint.

[0033] The chemical compensation layer 72 is a microporous Cu-Sn-Zn alloy, in which corrosion inhibitors are stored. The Cu-Sn-Zn ternary alloy has better corrosion resistance than pure copper and moderate hardness. When the water pressure increases, the corrosion inhibitors in the micropores are released to counteract micro-corrosion and perform chemical compensation.

[0034] The physical compensation layer 73 is an epoxy resin with dispersed polytetrafluoroethylene particles (i.e., PTFE). The epoxy resin provides rigid support, and the PTFE reduces the coefficient of friction to (0.05-0.1) and fills the microcracks on the surface of the structure to perform physical compensation.

[0035] The buffer sealing unit 21 is a nitrile rubber protrusion, and its inner wall forms an arc-shaped pressure relief cavity. Multiple buffer sealing units 21 are equidistantly arranged in the circumferential direction and are sealed and snapped into the ball head 4 to ensure that the fluid does not leak when the ball head 4 is in motion.

[0036] A water pressure sensor 22 is installed inside the female connector 2, and the water pressure sensor 22 is connected to the alarm system in the cloud.

[0037] The implementation principle of this application embodiment is as follows: During the use of this product, high-pressure water enters from the left end of the male connector 1 and impacts the small-diameter long end of the water pressure compensation ring 5. The water pressure pushes the conical rubber ring to expand radially (with the spring component 6 assisting in pre-tightening), so that the ring body is tightly attached to the inner wall of the pipe. At the same time, the water flows into the gap between the ball seat 3 and the ball head 4 through the pressure reducing chamber inlet 11. The kinetic energy is consumed by the arc-shaped pressure reducing chamber of the buffer sealing unit 21, reducing the impact at the joint position.

[0038] When water penetrates to the threaded section 7, the microporous Cu-Sn-Zn alloy of the chemical compensation layer 72 releases corrosion inhibitors under pressure, repairing micro-corrosion in the thread meshing area. The PTFE particles of the physical compensation layer 73 fill the cracks in the epoxy resin matrix, reducing the risk of thread loosening. The flow restrictor 23 shrinks the flow channel cross-section, guiding the water flow smoothly through the water pressure compensation ring 5 area, suppressing the erosion of the spring component 6 by turbulence. The water pressure sensor 22 monitors the sealing pressure in real time, triggering a system alarm when abnormal. This forms a full-cycle protection chain of "dynamic sealing - corrosion repair - status early warning," extending the joint's lifespan.

[0039] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from its essential characteristics. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A movable threaded connector, comprising a male connector (1) and a female connector (2), wherein a ball seat (3) is fixedly connected to one end of the male connector (1), and a ball head (4) is fixedly connected to one end of the female connector (2), wherein the ball seat (3) and the ball head (4) are movably connected, characterized in that: The outermost axial ends of the male connector (1) and the female connector (2) are formed with threaded sections (7), and a water pressure compensation ring (5) is provided on the inner axial end of the threaded section (7). The innermost axial end of the male connector (1) forms a pressure reducing chamber inlet (11), and the innermost axial end of the female connector (2) has multiple buffer sealing units (21). The pressure reducing chamber inlet (11) is connected to the buffer sealing unit (21) via the ball seat (3) and the ball head (4).

2. A movable threaded joint according to claim 1, characterized in that: The water pressure compensation ring (5) is made of high elastic rubber. The two ends of the water pressure compensation ring (5) have different ring diameters. The outer diameter is longer than the inner diameter, and the larger diameter is fixedly connected to the inner wall of the connector. Multiple springs (6) are provided between the smaller diameter and the inner wall of the connector.

3. A movable threaded joint according to claim 2, characterized in that: A flow limiting element (23) is also provided on the female connector (2) in the inward position relative to the water pressure compensation ring (5). The outer wall of the flow limiting element (23) is connected and fixed to the inner wall of the female connector (2). The inner wall of the flow limiting element (23) has different ring diameters at both ends in the axial direction. The inner wall diameter of the inner end in the axial direction is longer than the inner wall diameter of the outer end in the axial direction, and the inner wall diameter of the outer end in the axial direction does not exceed the inner wall diameter of the inner end in the axial direction of the water pressure compensation ring (5).

4. A movable threaded joint according to claim 1, characterized in that: The threaded section (7) includes a base layer (71), a chemical compensation layer (72) and a physical compensation layer (73) stacked in a radial direction from the outside to the inside, wherein the base layer (71) is made of the same material as the joint.

5. A movable threaded joint according to claim 4, characterized in that: The chemical compensation layer (72) is a microporous Cu-Sn-Zn alloy, and corrosion inhibitors are stored in its micropores.

6. A movable threaded joint according to claim 4, characterized in that: The physical compensation layer (73) is an epoxy resin with polytetrafluoroethylene particles dispersed in it.

7. A movable threaded joint according to claim 1, characterized in that: The buffer sealing unit (21) is a nitrile rubber protrusion, and its inner wall forms an arc-shaped pressure relief cavity. Multiple buffer sealing units (21) are equidistantly arranged in the circumferential direction and are sealed and snapped into the ball head (4).

8. A movable threaded joint according to claim 1, characterized in that: A water pressure sensor (22) is installed inside the female connector (2).

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