High-pressure pipe metal connecting piece with self-locking structure

Abstract

The utility model discloses a high-pressure pipe metal connecting piece with a self-locking structure. The high-pressure pipe metal connecting piece comprises an upper pipe connector, a lower protruding pipe integrally formed at the lower end of the upper pipe connector, a lower pipe connector in threaded fit with the peripheral face of the upper pipe connector and a T-shaped hollow protruding pipe fixed to the center of the interior of the lower pipe connector. At least two symmetrical elastic abutting structures are installed on the four sets of outer walls of the lower protruding pipe, and the top end of the T-shaped hollow protruding pipe extends into the lower protruding pipe and makes contact with the elastic abutting structures. After the upper pipe joint and the lower pipe joint are in threaded connection, the T-shaped hollow protruding pipe in the lower pipe joint extends into the lower protruding pipe of the upper pipe joint and makes contact with the elastic abutting structure, at the moment, the upper end of the T-shaped hollow protruding pipe forces the elastic abutting structure to act, and the elastic abutting structure locks the lower pipe joint; the self-locking function is achieved after the upper pipe joint and the lower pipe joint are in threaded connection.

Description

Technical Field

[0001] This utility model relates to the field of pipe connector technology, specifically a high-pressure pipe metal connector with a self-locking structure. Background Technology

[0002] Metal connectors at the ends of high-pressure pipes are primarily responsible for achieving tight connections and seals between pipes and equipment or between pipes in hydraulic and pneumatic systems, ensuring the safe and stable operation of the pipeline. These metal connectors consist of internal threads or quick-connect interfaces, seals (such as O-rings or washers), connecting sleeves or bushings, fasteners (such as nuts or clamping rings), and protective shells. These parts work together to ensure the sealing and mechanical strength of the connection. During use, it is essential to first ensure the cleanliness of the connectors and pipe ends, and then assemble them according to the connection method. After connection, pressure testing should be performed to ensure no leakage. Currently, high-pressure pipeline connectors mainly rely on threaded grooves and fasteners for connection. The advantages of this connection method are its simple structure, low cost, ease of operation, and suitability for various environmental conditions. However, standard threaded connections do not have an automatic locking function after connection. The friction coefficient of ordinary threads is limited, and after tightening, factors such as vibration and pressure fluctuations can easily cause the nut to gradually loosen, leading to leakage or even breakage at the joint of the two connectors, threatening pipeline operation. Furthermore, to ensure the reliability of the connection, the connectors also need to be checked for tightness regularly, increasing maintenance costs and workload. Utility Model Content

[0003] The purpose of this utility model is to provide a high-pressure pipe metal connector with a self-locking structure. After the upper and lower pipe connectors are threaded together, the T-shaped hollow convex tube in the lower pipe connector extends into the lower convex tube of the upper pipe connector and contacts the elastic abutment structure. At this time, the upper end of the T-shaped hollow convex tube forces the elastic abutment structure to move, so that the elastic abutment structure locks the lower pipe connector, thereby solving the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a high-pressure pipe metal connector with a self-locking structure, comprising an upper pipe joint, a lower convex pipe integrally formed at the lower end of the upper pipe joint, a lower pipe joint with a threaded fit on the outer circumferential surface of the upper pipe joint, and a T-shaped hollow convex pipe fixed at the center position inside the lower pipe joint. At least two symmetrical elastic abutment structures are installed on the four sets of outer walls of the lower convex pipe. The top end of the T-shaped hollow convex pipe extends into the interior of the lower convex pipe and contacts the elastic abutment structure. After the upper end of the T-shaped hollow convex pipe contacts one end of the elastic abutment structure, the end of the elastic abutment structure away from the T-shaped hollow convex pipe enters the inner wall of the lower pipe joint.

[0005] Preferably, the outer wall of the upper pipe joint is provided with an external thread, and the inner wall of the lower pipe joint is provided with an internal thread for threaded engagement with the external thread.

[0006] Preferably, the top end of the upper pipe joint and the bottom end of the lower pipe joint are integrally formed with a second internal threaded pipe and a first internal threaded pipe, respectively. The inner and outer diameters of the second internal threaded pipe and the first internal threaded pipe are the same, and an annular lip is integrally formed on the outer wall of the second internal threaded pipe.

[0007] Preferably, the elastic abutment structure includes an external threaded head fixed on the outer wall of the lower convex tube, a guide pin slidably installed inside the external threaded head, a limiting head fixed at one end of the guide pin, and a helical spring fitted on the outer circumferential surface of the guide pin between the limiting head and the external threaded head, wherein the end of the helical spring away from the external threaded head is fixedly connected to one side of the outer wall of the limiting head.

[0008] Preferably, the top end of the T-shaped hollow convex tube is integrally formed with a conical head for contacting one end of the guide needle, and the interior of the lower convex tube is provided with a cavity for the conical head to enter. The outer diameter of the conical head gradually decreases from one end near the T-shaped hollow convex tube to the other end.

[0009] Preferably, the lower pipe connector has recesses on both the left and right inner walls, which are used to interlock with the limiting head.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This high-pressure pipe metal connector with a self-locking structure is provided with an upper pipe joint, a lower convex pipe, an elastic abutment structure, and a T-shaped hollow convex pipe that cooperate with each other. After the upper and lower pipe joints are threaded together, the T-shaped hollow convex pipe in the lower pipe joint extends into the lower convex pipe of the upper pipe joint and contacts the elastic abutment structure. At this time, the upper end of the T-shaped hollow convex pipe forces the elastic abutment structure to move, so that the elastic abutment structure locks the lower pipe joint, realizing the threaded connection of the upper and lower pipe joints. The device features a self-locking function upon connection. When the T-shaped hollow convex tube is inserted into the lower convex tube of the upper pipe connector, it forces the elastic abutment structure to actuate, making it tightly abut against the tube surface, thus forming a robust mechanical lock. This mechanical lock not only resists thread loosening caused by vibration but also effectively prevents leakage caused by pressure changes, improving the overall safety of the connection. Furthermore, with the introduction of the elastic abutment structure, once the connection is completed, a reliable locking state is formed, eliminating the need for frequent tightening operations. This not only saves maintenance time but also reduces the risks caused by improper human operation. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0012] Figure 2This is a three-dimensional cross-sectional structural diagram of the present invention;

[0013] Figure 3 This is a schematic diagram of the front cross-sectional structure of this utility model;

[0014] Figure 4 This is a three-dimensional structural diagram of the upper pipe connector of this utility model;

[0015] Figure 5 This is a three-dimensional structural diagram of the lower pipe connector of this utility model.

[0016] In the diagram: 1. Upper pipe connector; 101. External threaded part; 2. Lower pipe connector; 201. Internal threaded part; 202. Concave part; 3. First internal threaded pipe; 4. Second internal threaded pipe; 5. T-shaped hollow convex pipe; 6. Conical head; 7. Lower convex pipe; 701. Cavity; 8. Elastic abutment structure; 801. External threaded head; 802. Guide pin; 803. Limiting head; 804. Helical spring. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0018] Example 1, by Figures 1 to 5 The present invention includes an upper pipe connector 1, a lower convex pipe 7 integrally formed at the lower end of the upper pipe connector 1, a lower pipe connector 2 with threaded engagement on the outer circumferential surface of the upper pipe connector 1, and a T-shaped hollow convex pipe 5 fixed at the center position inside the lower pipe connector 2. At least two symmetrical elastic abutment structures 8 are installed on the four sets of outer walls of the lower convex pipe 7. The top end of the T-shaped hollow convex pipe 5 extends into the interior of the lower convex pipe 7 and contacts the elastic abutment structure 8. After the upper end of the T-shaped hollow convex pipe 5 contacts one end of the elastic abutment structure 8, the end of the elastic abutment structure 8 away from the T-shaped hollow convex pipe 5 enters the inner wall of the lower pipe connector 2.

[0019] The upper pipe connector 1 has an external thread 101 on its outer wall, and the lower pipe connector 2 has an internal thread 201 on its inner wall for threading with the external thread 101. When the upper pipe connector 1 and the lower pipe connector 2 are connected, the upper pipe connector 1 is screwed into the internal thread 201 on the outer wall of the lower pipe connector 2 through the external thread 101 until they are screwed into place. After the upper pipe connector 1 and the lower pipe connector 2 are connected in place, the upper pipe connector 1, the lower convex pipe 7, and the T-shaped hollow convex pipe 5 are in a conductive state to allow fluid to pass through.

[0020] The top end of the upper pipe connector 1 and the bottom end of the lower pipe connector 2 are integrally formed with a second internal thread pipe 4 and a first internal thread pipe 3, respectively. The inner and outer diameters of the second internal thread pipe 4 and the first internal thread pipe 3 are the same. An annular lip is integrally formed on the outer wall of the second internal thread pipe 4. The ends of the upper pipe connector 1 and the lower pipe connector 2 that are far apart are connected to the threaded grooves at the ends of the high-pressure pipes through the first internal thread pipe 3 and the second internal thread pipe 4, respectively, so that the upper pipe connector 1 and the lower pipe connector 2 are connected to the high-pressure pipes. At this time, the two high-pressure pipes can be connected at their ends through the upper pipe connector 1 and the lower pipe connector 2.

[0021] Example 2, based on Example 1, is... Figure 3 , Figure 4 and Figure 5 The elastic abutment structure 8 includes an external threaded head 801 fixed on the outer wall of the lower convex tube 7, a guide pin 802 slidably installed inside the external threaded head 801, a limiting head 803 fixed at one end of the guide pin 802, and a helical spring 804 mounted on the outer circumference of the guide pin 802 between the limiting head 803 and the external threaded head 801. The end of the helical spring 804 away from the external threaded head 801 is fixedly connected to one side of the outer wall of the limiting head 803.

[0022] The top of the T-shaped hollow convex tube 5 is integrally formed with a conical head 6 for contacting one end of the guide needle 802. The interior of the lower convex tube 7 is provided with a cavity 701 for the conical head 6 to enter. The outer diameter of the conical head 6 gradually decreases from one end near the T-shaped hollow convex tube 5 to the other end. The left and right inner walls of the lower tube connector 2 are provided with concave portions 202, which are used to be inserted into the limiting head 803.

[0023] The cone head 6 at the upper end of the T-shaped hollow convex tube 5 enters the lower convex tube 7. As the outer diameter of the cone head 6 gradually decreases from one end near the T-shaped hollow convex tube 5 to the other end, as the cone head 6 enters the lower convex tube 7, the outer wall of the cone head 6 will gradually contact one end of the guide pin 802, causing the guide pin 802 to drive the limiting head 803 to move towards the concave part 202 until the limiting head 803 is fully inserted into the concave part 202. At this time, the position of the cone head 6 is stable and the helical spring 804 is in a stretched state. Thus, the upper tube connector 1 and the lower tube connector 2 are self-locked by the cooperation of the limiting head 803 and the concave part 202.

[0024] When the threads of the upper pipe connector 1 and the lower pipe connector 2 are separated, the cone head 6 is withdrawn into the lower convex tube 7. At this time, the helical spring 804 recovers its deformation due to the removal of external force, so that the guide pin 802 and the limiting head 803 are reset, thereby removing the locking effect on the lower pipe connector 2 and meeting the requirements of quick disassembly and quick assembly.

[0025] In the use of this embodiment, the operator should first ensure that all connecting components, including the upper pipe connector 1, lower pipe connector 2, T-shaped hollow convex tube 5, and elastic abutment structures 8 and 9, are intact and meet design and manufacturing standards. The operator should also check these components for cracks, deformation, corrosion, or other defects to ensure they meet usage requirements. Before formal connection, the operator should clean the connection points of the upper pipe connector 1 and lower pipe connector 2, ensuring that the threads and contact surfaces are free of impurities, grease, or rust. A special cleaning agent or clean cloth can be used for cleaning. If necessary, the threads should be lubricated to reduce frictional resistance during tightening, ensuring thread integrity and facilitating subsequent operations. The T-shaped hollow convex tube 5 of the lower pipe connector 2 is then inserted into the lower convex tube 7 of the upper pipe connector 1, and during insertion, the tube is simultaneously rotated... Tighten the upper pipe connector 1 and the lower pipe connector 2 until their threads are engaged. The operator observes the insertion depth of the T-shaped hollow convex tube 5 to ensure it is fully inserted into the predetermined position. As the T-shaped hollow convex tube 5 is gradually inserted, the elastic abutment structure 8 inside the lower convex tube 7 is forced to deform, causing the movable end of the elastic abutment structure 8 to contact the inner wall of the lower pipe connector 2, achieving elastic resistance and locking. Once the upper pipe connector 1 and the lower pipe connector 2 are properly engaged, the elastic abutment structure 8 also forms a stable locking effect on the inner wall of the lower pipe connector 2. During tightening, the predetermined torque value should be used to avoid over-tightening or over-loosening, ensuring the stability of the threaded connection between the upper pipe connector 1 and the lower pipe connector 2. After tightening, a manual inspection is performed to confirm that the threads are not loose and the connection is securely fastened.

Claims

1. A high pressure pipe metal connection with a self-locking structure, characterized by: The utility model provides a pipe joint, including upper pipe joint (1), the lower convex pipe (7) of integral moulding of upper pipe joint (1) lower end, the lower pipe joint (2) of threaded cooperation of upper pipe joint (1) outer periphery surface and the T type hollow convex pipe (5) of fixed position at lower pipe joint (2) inside center, four groups of outer walls of lower convex pipe (7) at least install two symmetrical elastic abutment structure (8), the top end of T type hollow convex pipe (5) extends to the inside of lower convex pipe (7) and mutually contacts with elastic abutment structure (8), the upper end of T type hollow convex pipe (5) makes elastic abutment structure (8) away from the one end of T type hollow convex pipe (5) and enters the inner wall of lower pipe joint (2) after contacting with one end of elastic abutment structure (8).

2. A high-pressure pipe metal connection with a self-locking structure according to claim 1, characterized in that: The outer wall of the upper pipe joint (1) is provided with an external thread part (101), and the inner wall of the lower pipe joint (2) is provided with an internal thread part (201) for threaded cooperation with the external thread part (101).

3. The high-pressure pipe metal connecting piece with a self-locking structure according to claim 1, characterized in that: The top end of the upper pipe joint (1) and the bottom end of the lower pipe joint (2) are integrally formed with a second internal thread pipe (4) and a first internal thread pipe (3) respectively, the internal and external diameters of the second internal thread pipe (4) and the first internal thread pipe (3) are the same, and the outer wall of the second internal thread pipe (4) is integrally formed with an annular lip.

4. The high-pressure pipe metal connecting piece with a self-locking structure according to claim 1, characterized in that: The elastic abutment structure (8) comprises an external thread head (801) fixed on the outer wall of the lower convex pipe (7), a guide needle (802) slidably installed in the external thread head (801), a limiting head (803) fixed at one end of the guide needle (802), and a helical spring (804) sleeved on the outer periphery of the guide needle (802) and installed between the limiting head (803) and the external thread head (801), one end of the helical spring (804) away from the external thread head (801) is fixedly connected with one side of the outer wall of the limiting head (803).

5. A high pressure pipe metal connection with a self-locking structure according to claim 4, characterized in that: The top end of the T type hollow convex pipe (5) is integrally formed with a tapered head part (6) for mutual contact with one end of the guide needle (802), the inside of the lower convex pipe (7) is provided with a cavity (701) for the tapered head part (6) to enter, and the outer diameter of the tapered head part (6) gradually decreases from one end close to the T type hollow convex pipe (5) to the other end.

6. A high pressure pipe metal connection with a self-locking structure according to claim 4, characterized in that: The left and right inner walls of the lower pipe joint (2) are both provided with an inner recess (202) for mutual insertion with the limiting head (803).

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