Adapter for standard gas cylinder

Abstract

The adapter for the standard gas cylinder comprises a gas nozzle body, a nut assembly, a clamping sleeve and a gas cylinder fixing assembly, the clamping sleeve is installed at the gas outlet end of the gas nozzle body through the nut assembly, a gas path channel is formed in the gas nozzle body, and a sealing assembly is arranged near a gas inlet port of the gas path channel. When the gas nozzle body is screwed into the gas cylinder fixing assembly, the sealing assembly makes contact with a gas outlet ejector pin of a standard gas cylinder and pushes the gas outlet ejector pin to open the standard gas cylinder. The utility model has the advantages of simple structure, firm and reliable installation, convenient disassembly and replacement, capability of ensuring good gas tightness of the gas circuit, and the like.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of gas online monitoring, in particular to an adapter used for marking gas cylinders. Background Art

[0002] When using a portable methane / non-methane total hydrocarbon analyzer to detect volatile organic compounds, it is usually necessary to use an adapter to connect the standard gas cylinder. Since the detection is mostly used outdoors and the use environment changes at any time, the portability of the installation of the standard gas cylinder is required to be high. In the prior art, the adapter mostly uses a threaded and gas valve matching method, which is inconvenient to disassemble and replace. In addition, the existing gas cylinder and adapter are sealed only by the upper surface of the gas cylinder contacting the inner wall of the adapter. Due to manufacturing defects and other problems, it cannot be ensured that the upper surface of the gas cylinder and the inner wall of the adapter are completely sealed, resulting in leakage during detection. How to achieve reliable installation of the adapter, convenient disassembly and replacement, and good air tightness of the gas path is a technical problem that needs to be solved by technical personnel in this field. Utility Model Content

[0003] In view of the technical problems existing in the prior art, the utility model provides an adapter for marking gas cylinders which has a simple structure, is firmly and reliably installed, is convenient to disassemble and replace, and can ensure good air tightness of the gas path.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A adapter for marking a gas cylinder comprises a gas nozzle body, a nut assembly, a ferrule and a gas cylinder fixing assembly, the ferrule being installed at the gas outlet end of the gas nozzle body through the nut assembly, an air path passage being provided in the gas nozzle body, a sealing assembly being provided near the air inlet port of the air path passage, when the gas nozzle body is screwed into the gas cylinder fixing assembly, the sealing assembly contacts the gas outlet ejector pin of the marking gas cylinder and pushes the gas outlet ejector pin to open the marking gas cylinder.

[0006] As a further improvement of the present invention: a groove for installing the sealing assembly is provided in the air nozzle body near the air inlet port.

[0007] As a further improvement of the present invention: the sealing component is an O-ring.

[0008] As a further improvement of the utility model: the air outlet end of the air nozzle body adopts a cylindrical structure design, and the outer surface of the cylindrical structure is provided with an external thread.

[0009] As a further improvement of the utility model: the gas cylinder fixing assembly is provided with a first chamber and a second chamber for accommodating the gas nozzle body.

[0010] As a further improvement of the present invention: the diameter of the first chamber is smaller than the diameter of the second chamber.

[0011] As a further improvement of the utility model: the air inlet end of the air nozzle body is designed with a variable diameter.

[0012] As a further improvement of the utility model: the air inlet end of the gas nozzle body is connected to the gas cylinder fixing assembly by a threaded connection.

[0013] As a further improvement of the utility model: the middle part of the air nozzle body is also provided with a hexagonal cylindrical surface for wrench operation.

[0014] As a further improvement of the utility model: the outer surface of the gas cylinder fixing assembly is provided with an anti-slip structure.

[0015] Compared with the prior art, the advantages of the utility model are:

[0016] The adapter for standard gas cylinders of the utility model is designed with a gas cylinder fixing component, through which the gas cylinder fixing component can effectively lock the gas nozzle body, thereby realizing a reliable and firm connection between the gas nozzle body and the gas cylinder, and is very convenient for disassembly, assembly and replacement, and is easy for cleaning and maintenance; the disposable standard gas cylinder is connected to the air inlet of the instrument by means of a nut assembly and a ferrule, the ferrule is installed in the nut assembly, and the ferrule is locked to the air outlet end of the gas nozzle body by means of the nut assembly, which can effectively ensure the air tightness of the entire gas circuit, realize stable and controllable flow of the entire gas circuit, and ensure the accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a stereogram of the utility model in a specific embodiment.

[0018] Figure 2 It is the main view of the utility model in a specific embodiment.

[0019] Figure 3 It is a cross-sectional view of the utility model in a specific embodiment.

[0020] Legend:

[0021] 1. Gas nozzle body; 2. Nut assembly; 3. Ferrule; 4. Gas cylinder fixing assembly; 41. First chamber; 42. Second chamber; 5. Gas path; 6. Sealing assembly; 7. Hexagonal cylindrical surface; 8. Gas outlet pin. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] like Figures 1 to 3As shown, this embodiment discloses an adapter for marking a gas cylinder, comprising a nozzle body 1, a nut assembly 2, a ferrule 3 and a gas cylinder fixing assembly 4. The ferrule 3 is installed at the gas outlet end of the nozzle body 1 through the nut assembly 2. An air path 5 is opened in the nozzle body 1. A sealing assembly 6 is provided near the air inlet port of the air path 5. When the nozzle body 1 is screwed into the gas cylinder fixing assembly 4, the sealing assembly 6 contacts the gas outlet ejector pin 8 of the marking gas cylinder and pushes the gas outlet ejector pin 8 to open the marking gas cylinder.

[0024] The adapter for the calibration gas cylinder in this embodiment is designed with a gas cylinder fixing component 4, through which the gas cylinder fixing component 4 can effectively lock the gas nozzle body 1, so that a reliable and firm connection between the gas nozzle body 1 and the gas cylinder is achieved, and it is very convenient to disassemble, assemble and replace, and is easy to clean and maintain; the disposable calibration gas cylinder is connected to the air inlet of the instrument by means of the cooperation of the nut component 2 and the ferrule 3, the ferrule 3 is installed in the nut component 2, and the ferrule 3 is locked to the air outlet end of the gas nozzle body 1 by means of the nut component 2, which can effectively ensure the air tightness of the entire gas circuit, achieve stable and controllable flow of the entire gas circuit, and ensure the accuracy of the test.

[0025] In this embodiment, a groove for installing a sealing component 6 is provided in the air nozzle body 1 near the air inlet port. The sealing component 6 is an O-ring, and the sealing component 6 can be reliably fixed through the groove.

[0026] In this embodiment, the outlet end of the air nozzle body 1 is designed with a cylindrical structure, and the outer surface of the cylindrical structure is provided with an external thread. The nut assembly 2 and the cylindrical structure are connected by threads, and the ferrule 3 is locked in the nut assembly 2.

[0027] In this embodiment, the gas cylinder fixing assembly 4 is provided with a first chamber 41 and a second chamber 42 for accommodating the gas nozzle body 1. Further, in a preferred embodiment, the diameter of the first chamber 41 is greater than the diameter of the second chamber 42.

[0028] In this embodiment, the inlet end of the gas nozzle body 1 adopts a variable diameter design, which matches the inner cavity design of the gas cylinder fixing component 4, and the inlet end of the gas nozzle body 1 is connected with the gas cylinder fixing component 4 by a threaded connection. When the gas nozzle body 1 is screwed into the gas cylinder fixing component 4, the front end of the gas outlet ejector pin 8 of the standard gas bottle first contacts the O-ring, and then the thread of the gas nozzle body 1 continues to be screwed into the threaded hole of the gas cylinder fixing component 4. The front end of the gas outlet ejector pin 8 of the standard gas bottle gradually extends into the gas path 5 as the gas nozzle body 1 is screwed in. When the O-ring and the conical shoulder of the gas outlet ejector pin 8 of the standard gas bottle are squeezed against each other, the gas outlet ejector pin 8 of the standard gas bottle is pushed, the standard gas bottle is opened, and the gas nozzle body 1 is further screwed in, and the gas output of the standard gas bottle is further increased. The greater the squeezing between the O-ring and the conical shoulder of the gas outlet ejector pin 8 of the standard gas bottle, the tighter the fit, and the air tightness and gas output are enhanced.

[0029] In this embodiment, a hexagonal cylindrical surface 7 for wrench operation is further provided in the middle of the gas nozzle body 1, and an anti-slip structure is provided on the outer surface of the gas cylinder fixing assembly 4, which is convenient for disassembly and assembly and conforms to the principle of ergonomics.

[0030] Working principle: Connect the gas nozzle body 1 from the upper end of the gas cylinder fixing component 4, rotate the gas nozzle body 1 to make the gas outlet ejector pin 8 of the standard gas cylinder gradually enter the gas path 5. Since the O-ring is installed at the gas inlet end of the gas nozzle body 1, when the gas nozzle body 1 is screwed into the gas cylinder fixing component 4, the front end of the gas outlet ejector pin 8 of the standard gas cylinder first contacts the O-ring, and then continue to screw the gas nozzle body 1 into the gas cylinder fixing component 4. The front end of the gas outlet pin 8 of the calibration gas bottle gradually extends into the gas path 5 as the gas nozzle body 1 is screwed in. When the O-ring contacts the conical shoulder of the gas outlet pin 8 of the calibration gas bottle, continuing to screw in the gas nozzle body 1 will cause the O-ring and the conical shoulder of the gas outlet pin 8 of the calibration gas bottle to be squeezed against each other. The gas outlet pin 8 of the calibration gas bottle is pushed, and the calibration gas bottle is opened. The gas nozzle body 1 is further screwed in, and the gas output of the calibration gas bottle is further increased. At the same time, the self-locking nature of the thread also ensures the extrusion depth of the gas outlet pin 8 of the calibration gas bottle, thereby ensuring stable gas output.

[0031] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should be regarded as the protection scope of the utility model.

Claims

1. An adapter for a gas cylinder, characterized in that: The invention comprises a gas nozzle body (1), a nut assembly (2), a ferrule (3) and a gas cylinder fixing assembly (4); the ferrule (3) is mounted on the gas outlet end of the gas nozzle body (1) through the nut assembly (2); a gas path (5) is provided in the gas nozzle body (1); a sealing assembly (6) is provided near the gas inlet port of the gas path (5); when the gas nozzle body (1) is screwed into the gas cylinder fixing assembly (4), the sealing assembly (6) contacts the gas outlet ejector pin (8) of the calibration gas cylinder and pushes the gas outlet ejector pin (8) to open the calibration gas cylinder.

2. The adapter for the calibration gas cylinder according to claim 1, characterized in that: A groove for mounting the sealing assembly (6) is provided in the air nozzle body (1) near the air inlet port.

3. The adapter for marking gas cylinder according to claim 1, characterized in that: The sealing component (6) is an O-ring.

4. The adapter for the calibration gas cylinder according to claim 2, characterized in that: The air outlet end of the air nozzle body (1) adopts a cylindrical structure design, and the outer surface of the cylindrical structure is provided with an external thread.

5. The adapter for the calibration gas cylinder according to claim 1, characterized in that: The gas cylinder fixing assembly (4) is provided with a first chamber (41) and a second chamber (42) for accommodating the gas nozzle body (1).

6. The adapter for the calibration gas cylinder according to claim 5, characterized in that: The diameter of the first chamber (41) is smaller than the diameter of the second chamber (42).

7. The adapter for the calibration gas cylinder according to claim 6, characterized in that: The air inlet end of the air nozzle body (1) is of variable diameter design.

8. The adapter for marking gas cylinders according to any one of claims 1 to 7, characterized in that: The air inlet end of the gas nozzle body (1) is connected to the gas cylinder fixing assembly (4) by means of a threaded connection.

9. The adapter for marking gas cylinders according to any one of claims 1 to 7, characterized in that: The middle portion of the air nozzle body (1) is also provided with a hexagonal cylindrical surface (7) for wrench operation.

10. The adapter for marking gas cylinders according to any one of claims 1 to 7, characterized in that: The outer surface of the gas cylinder fixing assembly (4) is provided with an anti-slip structure.

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