Leakage-proof filling joint for high-purity gas
By using a double-layer structure with inner and outer tubes and an elastic component design, the problem of leakage caused by loosening of the high-purity gas filling connector under high pressure conditions is solved, achieving a more stable connection and avoiding gas leakage and safety hazards.
Patent Information
- Application Number
- CN202520402222.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-10
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-03-10
AI Technical Summary
Existing high-purity gas filling connectors are prone to loosening under high pressure, leading to gas leakage, which poses a safety hazard, especially when filling mixed gases.
The filling connector features a double-layer structure with inner and outer tubes. An elastic element and an O-ring are installed between the inner and outer tubes, and a self-locking compression is achieved through a threaded connection, ensuring a secure connection between the filling connector and the gas cylinder filling port.
It effectively avoids gas leakage caused by loosening of the filling connector during the connection process, improves the stability and safety of the connection, and reduces gas waste and safety risks.
Smart Images
Figure CN223882171U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of gas filling, in particular to a high-purity gas anti-leakage filling connector. BACKGROUND
[0002] High-purity gas is widely used in semiconductor manufacturing, precision instruments, medical treatment, biopharmaceuticals, scientific research and other fields. In order to ensure the purity and safety of the gas, the sealing, stability and anti-leakage performance of the high-purity gas filling process have very high requirements.
[0003] In the gas filling process, the filling connector, as an important component connecting the pipeline and the gas cylinder, plays a key role in pressure conveying and sealing connection. The existing filling connector generally adopts a threaded or quick connector structure to realize the connection between the filling equipment and the gas cylinder filling port. However, during the filling process, due to the impact of high-pressure gas, thermal expansion and cold contraction of the connector material, and uneven installation force of the operator, the connection between the filling connector and the gas cylinder filling port may be loose, resulting in gas leakage. Especially when filling mixed gas, the physical and chemical properties of different gases may exacerbate the risk of leakage, not only affecting the filling efficiency, but also bringing safety hazards such as gas waste, environmental pollution, and even explosion risk. CONTENT OF THE INVENTION
[0004] In view of the deficiencies of the prior art, the present application aims to provide a high-purity gas anti-leakage filling connector to solve the problems raised in the background.
[0005] According to an aspect of the present application, a leakage-proof filling joint of high-purity gas includes a filling pipe and a gas inlet pipe, the filling pipe is horizontally arranged and the gas inlet pipe is vertically arranged, the filling pipe is rotationally connected with the gas inlet pipe and both are communicated at the rotational connection, a front end of the filling pipe is fixedly connected with a gas filling port of a gas cylinder, a front half of the filling pipe is composed of an inner pipe and an outer pipe, both front ends of the inner pipe and the outer pipe are open structures and are separated, rear ends of the inner pipe and the outer pipe are connected into one body, an inner side wall of the outer pipe is fixedly connected with an outer side wall of the gas filling port through threads, an outer side wall of the inner pipe is fixedly connected with an inner side wall of the gas filling port through threads, an annular groove is formed between an outer circumferential side of the inner pipe and an inner circumferential side of the outer pipe, an elastic member is arranged at a groove bottom of the annular groove, when the filling pipe is threadedly connected with the gas filling port, an end surface of the gas filling port is in close contact with the elastic member, an inside of a rear half of the filling pipe is provided with a hollow structure to form a gas inlet cavity, a rear end of the gas inlet cavity is a closed end, a front end of the gas inlet cavity is in communication with the inner pipe, an upper end of the gas inlet pipe is open to connect a pipeline of a gas filling device, a lower end of the gas inlet pipe is fixedly provided with an inner connecting block, the connecting block is provided with a connecting cavity inside and is in communication with an inner cavity of the gas inlet pipe, a middle part of the connecting block is sealingly and rotationally connected with an outer side wall of the rear half of the filling pipe, the connecting cavity in the connecting block is in communication with the gas inlet cavity in the rear half of the filling pipe, a rear end surface of the filling pipe is fixedly provided with a connecting shaft, and a knob is fixedly arranged on the connecting shaft.
[0006] Preferably, the elastic member includes a spring and a contact block, a plurality of sliding grooves are equidistantly recessed on a circumferential direction of the groove bottom of the annular groove, each of the sliding grooves is slidingly provided with a contact block, and each of the contact blocks and the groove bottom of the sliding groove is fixedly provided with a spring, when the filling pipe is threadedly connected with the gas filling port, the end surface of the gas filling port extrudes the contact block to slide along the sliding groove and compresses the spring, so that the contact block reversely contacts the end surface of the gas filling port through the reaction force of the spring.
[0007] Preferably, an O-shaped sealing ring is embedded on a front open end surface of the inner pipe, when the filling pipe is threadedly connected with the gas filling port, the front open end surface of the inner pipe and the inside of the gas filling port are sealingly and contactingly connected through the O-shaped sealing ring, and the end surface of the gas filling port is in contact with the groove bottom surface of the annular groove.
[0008] Preferably, rotating holes are formed on both sides of the connecting block, and the rotating holes are communicated with the connecting cavity, the outer wall of the inflation pipe and the inner wall of the rotating hole are in rotating contact, the connecting cavity is a cylindrical cavity, and the inner diameter of the connecting cavity is larger than the outer diameter of the inflation pipe, a plurality of air inlet holes are uniformly and equidistantly formed on the circumferential wall of the inflation pipe in the connecting cavity along the circumferential direction, the air inlet holes are communicated with the connecting cavity and the air inlet cavity, and a rotating sealing bearing is fixed between the outer wall of the inflation pipe and the inner wall of the connecting cavity at positions on both sides of the air inlet hole along the axial direction.
[0009] Preferably, oil seal grooves are formed on the outer wall of the inflation pipe and the inner wall of the rotating hole at positions where the outer wall of the inflation pipe and the inner wall of the rotating hole are in rotating contact.
[0010] Preferably, a hexagonal nut is further fixed on the connecting shaft.
[0011] Compared with the prior art, the application has the following advantages: the inflation joint for high-purity gas leakage prevention of the application is provided with an inner-outer pipe double-layer structure in the front half of the inflation pipe of the inflation joint, so that when the inflation joint is connected with the inflation port of the gas cylinder, the inner wall of the outer pipe of the inflation joint is screwed with the outer wall of the inflation port of the gas cylinder, and the outer wall of the inner pipe is screwed with the inner wall of the inflation port of the gas cylinder, so that the inflation joint and the inflation port of the gas cylinder can be more stably connected together, and the elastic element arranged on the groove bottom of the annular groove formed between the inner pipe and the outer pipe makes the end face of the inflation port of the gas cylinder press the elastic element after the inflation pipe is screwed with the inflation port of the gas cylinder, so that the elastic element reversely contacts the end face of the inflation port of the gas cylinder through the reaction force of the elasticity of the elastic element, and then the threaded connection between the inflation pipe and the inflation port of the gas cylinder forms extrusion self-locking, so that the structural design of the inflation joint makes the inflation joint more stable when connected with the inflation port of the gas cylinder, and avoids loosening to cause gas leakage. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 is a perspective view of the inflation joint for high-purity gas leakage prevention according to an embodiment of the application when connected.
[0013] Figure 2 is a sectional view of the inflation joint for high-purity gas leakage prevention according to an embodiment of the application when connected.
[0014] Figure 3 is a perspective exploded view of the inflation joint for high-purity gas leakage prevention according to an embodiment of the application.
[0015] Figure 4 is a perspective sectional view of the inflation joint for high-purity gas leakage prevention according to an embodiment of the application.
[0016] 1, inflation pipe; 2, air inlet pipe; 3, gas cylinder inflation port; 4, inner pipe; 5, outer pipe; 6, annular groove; 7, air inlet cavity; 8, connecting block; 9, connecting cavity; 10, connecting shaft; 11, knob; 12, spring; 13, abutting block; 14, sliding groove; 15, O-shaped sealing ring; 16, rotating hole; 17, air inlet hole; 18, rotating sealing bearing; 19, oil seal groove; 20, hexagonal nut. DETAILED DESCRIPTION
[0017] In order to make the content of the present application more easily understood, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be noted that the words "front", "back", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "inner" and "outer" refer to the directions towards or away from the geometric center of a specific component. Figure 2
[0018] As Figures 1-4 The utility model discloses a kind of leakage-proof filling joints of high-purity gas, including filling pipe 1 and inlet pipe 2, filling pipe 1 is horizontally arranged and inlet pipe 2 is vertically arranged, filling pipe 1 is rotatably connected with inlet pipe 2 and both are communicated at rotatable connection, the front end of filling pipe 1 is threadedly connected with gas cylinder filling port 3, the front half of filling pipe 1 is composed of inner tube 4 and outer tube 5, the front end of inner tube 4 and outer tube 5 is open structure and both are separated, the rear end of inner tube 4 and outer tube 5 is connected into one, the inner side wall of outer tube 5 is fixedly connected with the outer side wall of gas cylinder filling port 3 by thread, the outer side wall of inner tube 4 is fixedly connected with the inner side wall of gas cylinder filling port 3 by thread, annular groove 6 is formed between the outer periphery of inner tube 4 and the inner periphery of outer tube 5, elastic member is arranged at the groove bottom of annular groove 6, specifically, elastic member includes spring 12 and abutting block 13, a plurality of sliding grooves 14 are equidistantly recessed on the circumferential direction of the groove bottom of annular groove 6, each sliding groove 14 is slidably provided with abutting block 13, and spring 12 is fixedly arranged between each abutting block 13 and the groove bottom of sliding groove 14, when filling pipe 1 is threadedly connected with gas cylinder filling port 3, the end surface of gas cylinder filling port 3 extrudes abutting block 13 and slides along sliding groove 14 and compresses spring 12, so that abutting block 13 reversely abuts the end surface of gas cylinder filling port 3 by the reaction force of spring 12, the threaded connection between filling pipe 1 and gas cylinder filling port 3 is extruded and locked, so that the connection is more stable.The rear end face of the inflation pipe 1 is fixedly provided with a connecting shaft 10, and a knob 11 is fixedly arranged on the connecting shaft 10. This design facilitates an operator to rotate the connecting shaft 10 by rotating the knob 11, and then to rotate the inflation pipe 1 so that the front end port of the inflation pipe 1 is threadedly connected with the gas cylinder inflation port 3. In addition, a hexagonal nut 20 is also fixedly arranged on the connecting shaft 10. This design enables the operator to use a wrench to rotate the hexagonal nut 20 to drive the inflation pipe 1 to rotate and be more tightly connected with the gas cylinder inflation port 3 when the inflation pipe 1 is threadedly connected with the gas cylinder inflation port 3.
[0019] Working principle: when the filling connector is connected with the gas cylinder inflation port 3, the front end port of the inflation pipe 1 of the filling connector is aligned with the gas cylinder inflation port 3, and then the operator rotates the knob 11 to drive the connecting shaft 10 to rotate, and then drives the inflation pipe 1 to rotate, so that the inner side wall of the outer pipe 5 of the front half of the inflation pipe 1 is threadedly connected with the outer side wall of the gas cylinder inflation port 3, and the outer side wall of the inner pipe 4 is threadedly connected with the inner side wall of the gas cylinder inflation port 3, so that the filling connector and the gas cylinder inflation port 3 can be stably connected together. Finally, the operator uses a wrench to rotate the hexagonal nut 20 to drive the inflation pipe 1 to rotate and be more tightly connected with the gas cylinder inflation port 3. At this time, the end face of the gas cylinder inflation port 3 extrudes the abutting block 13 arranged on the groove bottom of the annular groove 6 to slide along the sliding groove 14 and compress the spring 12, so that the abutting block 13 reversely abuts against the end face of the gas cylinder inflation port 3 through the reaction force of the spring 12. This design makes the thread connection between the inflation pipe 1 and the gas cylinder inflation port 3 form extrusion self-locking, so that the connection is more stable. Therefore, the structure design of the filling connector makes the filling connector more stable when connected with the gas cylinder inflation port, and avoids loosening to cause gas leakage.
[0020] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit them. Although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified or some technical features can be replaced by equivalents without departing from the spirit and scope of the claims of the present application.
Claims
1. A leak-tight filling connector for high-purity gas comprising a gas filling tube (1) and a gas inlet tube (2), characterized in that, The inflation pipe (1) is horizontally arranged and the air inlet pipe (2) is vertically arranged, the inflation pipe (1) is rotationally connected with the air inlet pipe (2) and both are communicated at the rotationally connected position, the front end of the inflation pipe (1) is fixedly connected with the gas cylinder inflation port (3), the front half of the inflation pipe (1) is composed of an inner pipe (4) and an outer pipe (5), the front ends of the inner pipe (4) and the outer pipe (5) are both open structures and are separated from each other, the rear ends of the inner pipe (4) and the outer pipe (5) are connected into one body, the inner side wall of the outer pipe (5) is fixedly connected with the outer side wall of the gas cylinder inflation port (3) through threads, the outer side wall of the inner pipe (4) is fixedly connected with the inner side wall of the gas cylinder inflation port (3) through threads, an annular groove (6) is formed between the outer circumferential side of the inner pipe (4) and the inner circumferential side of the outer pipe (5), a spring (12) is arranged at the groove bottom of the annular groove (6), when the inflation pipe (1) is threadedly connected with the gas cylinder inflation port (3), the end face of the gas cylinder inflation port (3) is in close contact with the spring (12), the inside of the rear half of the inflation pipe (1) is provided as a hollow structure to form an air inlet cavity (7), the rear end of the air inlet cavity (7) is a closed end, the front end of the air inlet cavity (7) is in communication with the inner pipe (4), the upper end of the air inlet pipe (2) is open to connect the pipeline of the inflation equipment, a connecting block (8) is fixedly arranged at the lower end of the air inlet pipe (2), the connecting block (8) is provided with a connecting cavity (9) in the inside and is in communication with the inner cavity of the air inlet pipe (2), the middle part of the connecting block (8) is sealingly and rotationally connected with the outer side wall of the rear half of the inflation pipe (1), the connecting cavity (9) in the connecting block (8) is in communication with the air inlet cavity (7) in the rear half of the inflation pipe (1), a connecting shaft (10) is fixedly arranged at the rear end face of the inflation pipe (1), a knob (11) is fixedly arranged on the connecting shaft (10).
2. The leak-proof filling connector for high-purity gas according to claim 1, wherein The spring (12) and the abutting block (13) are arranged in the annular groove (6), a plurality of sliding grooves (14) are equidistantly recessed on the circumferential direction of the groove bottom of the annular groove (6), the abutting block (13) is slidingly arranged in each sliding groove (14), and the spring (12) is fixedly arranged between each abutting block (13) and the groove bottom of the sliding groove (14), when the inflation pipe (1) is threadedly connected with the gas cylinder inflation port (3), the end face of the gas cylinder inflation port (3) extrudes the abutting block (13) to slide along the sliding groove (14) and compresses the spring (12), so that the abutting block (13) reversely abuts against the end face of the gas cylinder inflation port (3) through the reaction force of the spring (12).
3. The leak-proof filling connector for high-purity gas according to claim 2, characterized in that, The front opening end surface of the inner tube (4) is embedded with an O-shaped sealing ring (15), when the gas filling pipe (1) is screwed with the gas cylinder filling port (3), the front opening end surface of the inner tube (4) is in sealing contact connection with the inside of the gas cylinder filling port (3) through the O-shaped sealing ring (15), and the end surface of the gas cylinder filling port (3) is in contact with the groove bottom surface of the annular groove (6).
4. The leak-proof filling connector for high-purity gas according to claim 1, wherein Both sides of the connecting block (8) are provided with rotating holes (16) which are in communication with the connecting cavity (9), the outer side wall of the gas filling pipe (1) and the inner side wall of the rotating hole (16) are in rotating contact connection, the connecting cavity (9) is a cylindrical cavity, and the inner diameter of the connecting cavity (9) is larger than the outer diameter of the gas filling pipe (1), a plurality of gas inlet holes (17) are uniformly and equidistantly provided on the circumferential side wall of the gas filling pipe (1) in the connecting cavity (9) along the circumference, the gas inlet holes (17) are in communication with the connecting cavity (9) and the gas inlet cavity (7), and rotating sealing bearings (18) are fixed between the outer side wall of the gas filling pipe (1) and the inner side wall of the connecting cavity (9) at positions on both sides of the gas inlet holes (17) along the axial direction.
5. The leak-tight filling adapter for high-purity gas according to claim 4, wherein The outer side wall of the gas filling pipe (1) and the inner side wall of the rotating hole (16) are both provided with oil seal grooves (19) at the positions where they are in rotating contact connection.
6. The leak-proof filling connector for high-purity gas according to claim 1, wherein A hexagonal nut (20) is further fixed on the connecting shaft (10).