Quick connector for gas pipe or liquefied gas pipe

Abstract

The utility model discloses a quick joint for a gas pipe or a liquefied gas pipe, and relates to the technical field of pipeline joints. The gas pipe or liquefied gas pipe quick connector comprises a pipe body and a gas valve, the outer wall of the pipe body is sleeved with a cylinder sleeve, a sealing shaft is inserted into the inner wall of the pipe body, the outer wall of the sealing shaft is sleeved with an outer thread hexagon nut, the outer wall of the outer thread hexagon nut is in threaded connection with a hexagon bolt, and the outer wall of the hexagon bolt is in threaded connection with the gas valve. The inner wall of the hexagon bolt is provided with a sealing gasket and an anti-disengaging clamp, and the anti-disengaging clamp is arranged above the sealing gasket. The external thread nut and the sealing shaft are made into a split type, so that the external thread nut and the sealing shaft can rotate flexibly, the problem that the external thread nut cannot rotate in the prior art is solved, and the problem that the sealing shaft rotates and leaks air due to the fact that the external thread nut drives the sealing shaft to rotate is completely eradicated; and the sealing washer is a butyronitrile sealing washer which is matched with the anti-drop clamp, so that the problem that the sealing washer is extruded out of the sealing opening to cause untight sealing in the mounting process is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline joints, in particular to a quick joint for a gas pipe or a liquefied gas pipe. Background Art

[0002] The accessories currently used in the industry for this type of gas pipe joints are composed of the following parts. Figure 3 As follows: a sealing shaft integral part consisting of an inner thread nut and an outer thread nut, and a sealing gasket.

[0003] In the existing technology, because the external thread nut is integrated with the sealing shaft, once the sealing shaft is sealed and fixed, the external thread nut cannot rotate. When the product is in the hands of the user, once the external thread nut rotates during the installation process, the external thread nut will rotate with the sealing shaft, which will cause a poor seal between the sealing shaft and the tube body, resulting in air leakage, causing a safety hazard. In addition, the existing technology has relatively strict requirements on the installation technology and the professional level of the installer, and the existing technology will cause great safety hazards of air leakage. Utility Model Content

[0004] The purpose of the utility model is to provide a quick connector for a gas pipe or a liquefied gas pipe, which solves the technical problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a gas pipe or liquefied gas pipe quick connector, comprising a pipe body and a gas valve, the outer wall of the pipe body is sleeved with a cylinder sleeve, the inner wall of the pipe body is inserted with a sealing shaft, the outer wall of the sealing shaft is sleeved with an external thread hexagonal nut, the outer wall of the external thread hexagonal nut is threadedly connected with a hexagonal bolt, the inner wall of the hexagonal bolt is provided with a sealing gasket and an anti-dropping card, the anti-dropping card is arranged above the sealing gasket, and the external thread hexagonal nut and the hexagonal bolt are connected to the gas valve.

[0006] Preferably, the cylinder sleeve is fixedly connected to the outer wall of the pipe body by pressing with a hydraulic machine.

[0007] Preferably, a gas connection joint is provided on the outer wall of the gas valve, a protrusion is provided on the outer wall of the gas connection joint, and the anti-drop clamp is clamped with the outer wall of the gas connection joint via the protrusion.

[0008] Preferably, the inner wall of the external thread hexagonal nut is movably connected to the outer wall of the sealing shaft.

[0009] Compared with the related art, the gas pipe or liquefied gas pipe quick connector provided by the utility model has the following beneficial effects:

[0010] 1. The utility model makes the outer thread nut and the sealing shaft into a split type, so that the outer thread nut and the sealing shaft can rotate flexibly, which solves the problem of the outer thread nut being unable to rotate in the prior art and eliminates the problem of the sealing shaft rotating and leaking due to the outer thread nut rotating with the sealing shaft.

[0011] 2. Make sure that the outer thread nut does not come into direct contact with the combustion gas.

[0012] 3. The sealing gasket adopts nitrile sealing gasket and anti-dropping card to prevent the sealing gasket from being squeezed out of the sealing port during installation, resulting in loose sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0014] Figure 2 It is a schematic diagram of the explosion decomposition structure of the utility model;

[0015] Figure 3 Three views of the sealing shaft of the utility model

[0016] Figure 4 It is a schematic diagram of the prior art structure of the utility model.

[0017] In the figure: 1. pipe body; 2. gas valve; 3. cylinder sleeve; 4. sealing shaft; 5. external thread hexagonal nut; 6. hexagonal bolt; 7. sealing gasket; 8. anti-dropping card. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0019] Example:

[0020] See also Figure 1-Figure 3 The utility model provides a technical solution: a gas pipe or liquefied gas pipe quick connector, comprising a pipe body 1 and a gas valve 2, the outer wall of the pipe body 1 is sleeved with a cylinder sleeve 3, the inner wall of the pipe body 1 is inserted with a sealing shaft 4, the outer wall of the sealing shaft 4 is sleeved with an external thread hexagonal nut 5, the outer wall of the external thread hexagonal nut 5 is threadedly connected with a hexagonal bolt 6, the inner wall of the hexagonal bolt 6 is provided with a sealing gasket 7 and an anti-dropping card 8, the anti-dropping card 8 is arranged above the sealing gasket 7, the external thread hexagonal nut 5 and the hexagonal bolt 6 are connected to the gas valve 2.

[0021] The cylinder sleeve 3 is fixedly connected to the outer wall of the pipe body 1 by pressing with a hydraulic machine.

[0022] In this embodiment, a hydraulic machine is used to compress the cylinder sleeve 3 so that it is tightly fixed to the pipe body 1 .

[0023] The outer wall of the gas valve 2 is provided with a gas connection joint, the outer wall of the gas connection joint is provided with a protrusion, and the anti-dropping clamp 8 is clamped with the outer wall of the gas connection joint through the protrusion.

[0024] In this embodiment, the anti-dropout clamp 8 is provided to make the connection between the device and the gas valve 2 more secure, and the anti-dropout clamp 8 is engaged with the protrusion to avoid loose connection and poor sealing.

[0025] The inner wall of the external thread hexagonal nut 5 is movably connected to the outer wall of the sealing shaft 4 .

[0026] In this embodiment, the external thread hexagonal nut 5 and the sealing shaft 4 can be made of materials such as HPb59-1 copper or 06Cr19Ni10 stainless steel.

[0027] Working principle: When in use, the cylinder sleeve 3 is sleeved on the outside of the tube body 1, and then the cylinder sleeve 3 is compressed by hydraulic equipment to fix it with the tube body 1, and then the sealing shaft 4 is inserted into the tube body 1, and the external thread hexagonal nut 5 is sleeved on the outside of the sealing shaft 4. The external thread hexagonal nut 5 and the sealing shaft 4 are split structures. When the external thread hexagonal nut 5 rotates, it will not drive the inner sealing shaft 4 to rotate, so that the sealing shaft 4 can maintain the seal with the tube body 1, and then the hexagonal bolt 6 is installed on the outside of the external thread hexagonal nut 5, and the sealing gasket 7 and the anti-dropping card 8 are placed in the hexagonal bolt 6. Finally, the device is connected to the gas valve 2. The sealing gasket 7 adopts a nitrile sealing gasket 7 and an anti-dropping card 8 to prevent the sealing gasket 7 from being squeezed out of the sealing port during the installation process, resulting in a loose seal.

Claims

1. A quick connector for a gas pipe or liquefied gas pipe, comprising a pipe body (1) and a gas valve (2), characterized in that: The outer wall of the tube body (1) is sleeved with a cylinder sleeve (3), the inner wall of the tube body (1) is plugged with a sealing shaft (4), the outer wall of the sealing shaft (4) is sleeved with an external thread hexagonal nut (5), the outer wall of the external thread hexagonal nut (5) is threadedly connected with a hexagonal bolt (6), the inner wall of the hexagonal bolt (6) is provided with a sealing gasket (7) and an anti-dropping clamp (8), the anti-dropping clamp (8) is provided above the sealing gasket (7), and the external thread hexagonal nut (5) and the hexagonal bolt (6) are connected to the gas valve (2).

2. The gas pipe or liquefied gas pipe quick connector according to claim 1, characterized in that: The cylinder sleeve (3) is fixedly connected to the outer wall of the pipe body (1) by pressing with a hydraulic machine.

3. The quick connector for gas pipe or liquefied gas pipe according to claim 1, characterized in that: The outer wall of the gas valve (2) is provided with a gas connection joint, the outer wall of the gas connection joint is provided with a protrusion, and the anti-drop clamp (8) is clamped with the outer wall of the gas connection joint via the protrusion.

4. The gas pipe or liquefied gas pipe quick connector according to claim 1, characterized in that: The inner wall of the external thread hexagonal nut (5) is movably connected to the outer wall of the sealing shaft (4).

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