High-pressure hydrogen cylinder with multiple sealing structure

Abstract

This utility model relates to the field of union technology, specifically disclosing a high-pressure union with a multi-seal structure, including a union outer tube, a male union head in sealing contact inside the union outer tube, and a female union head threadedly connected inside the union outer tube. The male union head forms a spherical seal with the female union head through a spherical head, and the female union head is sealed to the male union head through a sealing ring. The female union head is threadedly connected to a threaded ring, and the threaded ring is connected to a sealing disc via a support plate and a rotating frame. The surface of the sealing disc is in close contact with the union outer tube and the female union head. This utility model forms a spherical seal with the female union head through the spherical head, seals the connection between the male and female union heads through the sealing ring, forms a spherical seal with the inner wall of the union outer tube through the male union head, and also seals the union outer tube through the threaded groove and the sealing disc. Through multiple sealing measures, a good overall seal is maintained.

Description

Technical Field

[0001] This utility model relates to the field of union technology, specifically a high-pressure union with a multi-seal structure. Background Technology

[0002] Unions, also known as pipe fittings or unions, are common pipe connectors that are easy to install and disassemble. They connect two pipes and can separate them without moving the pipes, making maintenance easier. Unions consist of three parts: a threaded head, a ball head, and a cap. The sealing surface inside a union can be flat, spherical, or conical. Unions can be connected to pipes in various ways, including butt welding, socket welding, and threaded connections.

[0003] Chinese Patent CN209638586U discloses a combined high-pressure union, comprising a male union connector, a female union connector, and a union disc. The male and female union connectors mate inside the union disc to form a line seal, and are threadedly connected to the union disc. A limiting device is fitted around the outside of the union disc, comprising two semi-cylinders connected by snap-fits, with corresponding cutouts inside the male, female, and union disc connectors. Mounting holes are provided at both ends of the semi-cylinders, corresponding to the male and female union connectors respectively. The inner wall of the mounting holes has internal threads, and a T-shaped pin is provided within the mounting holes. The pin includes an integrally formed needle head and a needle seat. The outer wall of the needle seat has external threads that mesh with the internal threads, and the upper surface of the needle seat has an internal hexagonal groove. A long groove is provided on one side of the mounting holes, and a limit switch is located within the long groove. The push rod of the limit switch is positioned below the needle seat. This design features a simple structure, convenient installation and removal, and protection and monitoring functions.

[0004] However, the connection between the female and male unions in the aforementioned patent lacks a sealing component, which can easily lead to poor sealing performance of this high-pressure union. Utility Model Content

[0005] The purpose of this invention is to provide a high-pressure union with multiple sealing structures to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-pressure union with a multi-seal structure, comprising a union outer tube, a male union head in sealing contact inside the union outer tube, and a female union head threadedly connected inside the union outer tube. The male union head forms a spherical seal with the female union head through a spherical head, and the female union head is sealed to the male union head through a sealing ring. The female union head is threadedly connected to a threaded ring, and the threaded ring is connected to a sealing disc through a support plate and a rotating frame. The surface of the sealing disc is in close contact with the union outer tube and the female union head.

[0007] Preferably, the outer tube has three protrusions evenly and fixedly connected to its surface, and the inner wall of the outer tube has a through groove.

[0008] Preferably, the upper end of the male connector is semi-circular and the lower end is tubular. The upper end of the male connector is fixedly connected to the spherical head. The diameter of the spherical head is smaller than the diameter of the semi-circle at the upper end of the male connector. The inner wall of the male connector has holes that pass through the male connector and the spherical head in sequence. The surface of the male connector is linearly sealed to the outer tube ball of the connector.

[0009] Preferably, the surface of the female connector has a first threaded groove, and the female connector is threaded to the outer pipe of the connector through the first threaded groove. The cross-section of the female connector is convex. The upper surface of the female connector has a second threaded groove, the inner wall of the female connector has a through hole, and the lower end of the female connector has a spherical groove. The spherical head and the spherical groove are spherically sealed together.

[0010] Preferably, the threaded ring and the threaded groove are connected by two threads. Four rotating seats are evenly arranged at the lower end of the threaded ring. The rotating seats are slidably connected to the threaded ring through T-shaped blocks. The inner wall of the rotating seats is rotatably connected to the rotating frame through a rotating shaft. The inner wall of the rotating frame is rotatably connected to the support plate through a rotating shaft.

[0011] Preferably, the upper end of the male connector is fixedly connected to the sealing ring, the sealing ring is in close contact with the female connector, and the male connector and the female connector are in sealed contact.

[0012] Preferably, the outer arc surface of the sealing disc is slidably connected to the outer union tube, the inner arc surface of the sealing disc is threadedly connected to the surface of the female union head, a sliding groove is provided on the upper side of the sealing disc, the end of the rotating frame away from the rotating seat is rotatably connected to the sliding groove through a rotating shaft, and the end of the support plate away from the rotating seat is rotatably connected to the sealing disc.

[0013] This invention forms a spherical seal between the spherical head and the female union head, seals the connection between the male and female union heads with a sealing ring, and forms a spherical seal between the male union head and the inner wall of the union outer tube. At the same time, the outer tube of the union can also be sealed through the threaded groove and the sealing disc. Through multiple sealing measures, the overall seal is well maintained. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the female connector of this utility model; Figure 3 This is a schematic diagram of the sealing ring structure of this utility model; Figure 4 This is a schematic diagram of the threaded ring of this utility model.

[0015] In the diagram: 1. Male union head; 2. Female union head; 3. Union outer tube; 4. Protrusion; 5. Threaded groove one; 6. Sealing ring; 7. Spherical head; 8. Sealing disc; 9. Slide groove; 10. Threaded groove two; 11. Threaded ring; 12. Rotating frame; 13. Support plate; 14. Rotating seat. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0017] Please see Figures 1-4 This utility model provides a technical solution: a high-pressure union with a multi-seal structure, including a union outer tube 3, three protrusions 4 are uniformly fixedly connected to the surface of the union outer tube 3, the protrusions 4 facilitate the installation and rotation of the union outer tube 3, and a through groove is opened on the inner wall of the union outer tube 3, the groove facilitates the installation of the male union head 1 and the female union head 2.

[0018] The upper end of the male connector 1 is semi-circular for easy sealing, and the lower end is tubular. The upper end of the male connector 1 is fixedly connected to the spherical head 7. The diameter of the spherical head 7 is smaller than the diameter of the semi-circular upper end of the male connector 1 to facilitate the installation of the sealing ring 6. The inner wall of the male connector 1 has holes that pass through the male connector 1 and the spherical head 7 in sequence. The surface of the male connector 1 is spherically sealed to the outer tube 3 of the connector, thereby effectively sealing the internally flowing substance. The surface of the female connector 2 has a threaded groove 5. Union head 2 is threaded to union outer tube 3 through threaded groove 1 5. The female union head 2 can be fixed through threaded groove 1 5. The female union head 2 has a convex cross section. The upper surface of the female union head 2 is provided with threaded groove 2 10. The threaded ring 11 can be fixed through threaded groove 2 10. The inner wall of the female union head 2 is provided with a through hole. The lower end of the female union head 2 is provided with a spherical groove. The spherical head 7 is spherically sealed to the spherical groove. At this time, the connection between the male union head 1 and the female union head 2 remains sealed.

[0019] The threaded ring 11 is threadedly connected to the threaded groove 10. Four rotating seats 14 are evenly arranged at the lower end of the threaded ring 11. The rotating seats 14 are slidably connected to the threaded ring 11 via T-blocks. When the threaded ring 11 rotates, the rotating seats 14 can maintain their position. The inner wall of the rotating seat 14 is rotatably connected to the rotating frame 12 via a rotating shaft. The inner wall of the rotating frame 12 is rotatably connected to the support plate 13 via a rotating shaft. The rotating frame 12 can improve the supporting force of the support plate 13. The upper end of the male connector 1 is fixedly connected to the sealing ring 6. The sealing ring 6 is in close contact with the female connector 2. The sealing ring 6 can further seal the connection between the male connector 1 and the female connector 2. The male connector 1 and the female connector 2 are in sealed contact. The outer edge of the sealing disc 8... The arc surface is slidably connected to the union outer tube 3. The inner wall of the union outer tube 3 can be sealed by the sealing disc 8. The inner arc surface of the sealing disc 8 is threadedly connected to the surface of the female union head 2. A sliding groove 9 is provided on the upper side of the sealing disc 8. The end of the rotating frame 12 away from the rotating seat 14 is rotatably connected to the sliding groove 9 by a rotating shaft. When the threaded ring 11 rotates, it will move vertically along the threaded groove 10. At this time, due to the large friction between the sealing disc 8 and the inner wall of the union outer tube 3, the rotating seat 14 will not rotate under the restriction of the rotating frame 12 and the support plate 13. It will only drive the sealing disc 8 to move vertically, thereby sealing the union outer tube 3 by the sealing disc 8. The end of the support plate 13 away from the rotating seat 14 is rotatably connected to the sealing disc 8.

[0020] Insert the male connector 1 into the outer connector tube 3, and then connect the female connector 2 to the inner wall of the outer connector tube 3 via the threaded groove 5. At this time, the spherical head 7 and the female connector 2 form the first layer of spherical linear seal, and the sealing ring 6 seals again. Then, by rotating the threaded ring 11, the rotating seat 14 is moved, so that the sealing disc 8 is in close contact with the female connector 2. At this time, the male connector 1 and the inner wall of the outer connector tube 3 form a spherical linear seal, and the threaded groove 5 and the sealing disc 8 can also produce a sealing effect, thereby ensuring the overall sealing effect.

[0021] In actual use, a ball-shaped seal is formed between the ball head 7 and the female union head 2. The sealing ring 6 seals the connection between the male union head 1 and the female union head 2. A ball-shaped seal is formed between the male union head 1 and the inner wall of the union outer tube 3. At the same time, the threaded groove 5 and the sealing disc 8 can also seal the union outer tube 3. Through multiple sealing measures, a strong sealing effect is maintained overall.

[0022] 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 high-pressure union with a multi-layer sealing structure, characterized in that: The device includes a union outer tube (3), a male union head (1) which is sealed inside the union outer tube (3), and a female union head (2) which is threaded inside the union outer tube (3). The male union head (1) forms a spherical seal with the female union head (2) through a ball head (7). The female union head (2) is sealed to the male union head (1) through a sealing ring (6). The female union head (2) is threaded to a threaded ring (11). The threaded ring (11) is connected to a sealing disc (8) through a support plate (13) and a rotating frame (12). The surface of the sealing disc (8) is in close contact with the union outer tube (3) and the female union head (2).

2. A high-pressure union with a multi-seal structure according to claim 1, characterized in that: The outer tube (3) is uniformly fixedly connected with three protrusions (4), and the inner wall of the outer tube (3) is provided with a through groove.

3. A high-pressure union with a multiple sealing structure according to claim 1, characterized in that: The upper end of the union head (1) is semi-circular and the lower end is tubular. The upper end of the union head (1) is fixedly connected to the spherical head (7). The diameter of the spherical head (7) is smaller than the diameter of the semi-circle at the upper end of the union head (1). The inner wall of the union head (1) has holes that pass through the union head (1) and the spherical head (7) in sequence. The surface of the union head (1) is spherically sealed to the union outer tube (3).

4. A high-pressure union with a multi-seal structure according to claim 1, characterized in that: The surface of the female connector (2) is provided with a threaded groove (5). The female connector (2) is threadedly connected to the outer tube (3) through the threaded groove (5). The cross section of the female connector (2) is convex. The surface of the upper end of the female connector (2) is provided with a threaded groove (10). The inner wall of the female connector (2) is provided with a through hole. The lower end of the female connector (2) is provided with a spherical groove. The spherical head (7) is spherically sealed to the spherical groove.

5. A high-pressure union with a multi-seal structure according to claim 4, characterized in that: The threaded ring (11) is threadedly connected to the threaded groove (10). Four rotating seats (14) are evenly arranged at the lower end of the threaded ring (11). The rotating seats (14) are slidably connected to the threaded ring (11) through T-shaped blocks. The inner wall of the rotating seat (14) is rotatably connected to the rotating frame (12) through a rotating shaft. The inner wall of the rotating frame (12) is rotatably connected to the support plate (13) through a rotating shaft.

6. A high-pressure union with a multi-seal structure according to claim 1, characterized in that: The upper end of the male union (1) is fixedly connected to the sealing ring (6), and the sealing ring (6) is in close contact with the female union (2), and the male union (1) and the female union (2) are in sealed contact.

7. A high-pressure union with a multi-seal structure according to claim 1, characterized in that: The outer arc surface of the sealing disc (8) is slidably connected to the union outer tube (3), the inner arc surface of the sealing disc (8) is threadedly connected to the surface of the female union head (2), a sliding groove (9) is provided on the upper side of the sealing disc (8), the end of the rotating frame (12) away from the rotating seat (14) is rotatably connected to the sliding groove (9) through a rotating shaft, and the end of the support plate (13) away from the rotating seat (14) is rotatably connected to the sealing disc (8).

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