Rebound-free high-pressure air quick connector

Abstract

The invention discloses a rebound-free high-pressure air quick connector. The rebound-free high-pressure air quick connector comprises a middle pipe body, an air inlet pipe is arranged at one end of the middle pipe body, an air outlet pipe is arranged at the other end of the middle pipe body, the end face, inserted into the middle pipe body, of the air inlet pipe and the air outlet pipe and the inner wall of the middle pipe body form a transition cavity, and a valve element is arranged in the transition cavity and comprises a piston rod in sliding connection with the air outlet pipe. The end, extending into the transition cavity, of the piston rod is provided with a sealing plate used for blocking the air inlet pipe, the outer diameter of the sealing plate is smaller than the inner diameter of the middle pipe body, and a limiting boss is arranged in the transition cavity and used for preventing the sealing plate from blocking the air outlet pipe. The device is used for slowly releasing countercurrent high-pressure gas in the gas outlet pipe. The problems that in the prior art, the injury prevention effect is poor, and operation is tedious are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of quick connectors, and particularly to a non - rebound high - pressure air quick connector. Background Art

[0002] The sub - air pipe is installed on the outlet pipeline joint of the air distribution manifold through a quick connector to deliver compressed air to different air - using devices. When the sub - air pipe is pulled out, the retained high - pressure gas in the sub - air pipe flows reversely towards the quick - connector side and is released, generating a large impact force. When the quick - connector swings, it is easy to cause harm to the operating personnel. In view of the above safety hazards, currently, after the sub - air pipe is connected to the air distribution manifold through the quick connector, a rope is added. One end of the rope is tied to the end of the sub - air pipe, and the other end is tied to the air distribution manifold. To a certain extent, the swinging amplitude of the quick - connector after being pulled out is reduced, and the safety is improved. However, when tying the rope, a certain margin needs to be left, that is, to ensure that the quick - connector tied by the rope has a certain movement space before it can be pulled out from the air distribution manifold. If the margin is enlarged, the movement space of the quick - connector will increase accordingly, and the safety will decrease. Therefore, the anti - injury effect of this method is poor, and the operation is also relatively cumbersome. Summary of the Invention

[0003] The purpose of the present invention is to provide a non - rebound high - pressure air quick connector that can improve the anti - injury effect and is convenient to operate in view of the deficiencies of the existing technology.

[0004] To achieve the above purpose, the technical solution adopted by the non - rebound high - pressure air quick connector of the present invention is as follows:

[0005] A non - rebound high - pressure air quick connector includes an intermediate pipe body. An air inlet pipe is arranged at one end of the intermediate pipe body, and an air outlet pipe is arranged at the other end. The air inlet and outlet pipes are inserted into the end face of the intermediate pipe body and the inner wall of the intermediate pipe body to form a transition cavity. A valve core is arranged in the transition cavity. The valve core includes a piston rod slidably connected to the air outlet pipe. The piston rod is provided with an air duct for communicating the transition cavity and the inner cavity of the air outlet pipe. One end of the piston rod extending into the transition cavity is provided with a sealing plate for blocking the air inlet pipe. The outer diameter of the sealing plate is smaller than the inner diameter of the intermediate pipe body. A limiting boss is arranged in the transition cavity to prevent the sealing plate from blocking the air outlet pipe. The sealing plate is provided with an exhaust duct for slowly releasing the reverse high - pressure gas in the air outlet pipe. During normal ventilation, the high - pressure gas enters from the air inlet pipe, pushes the sealing plate, and the high - pressure gas passes through the transition cavity, air duct and enters the exhaust pipe. When disassembling, the reverse high - pressure gas in the air outlet pipe pushes the sealing plate through the air duct and transition cavity to block the air inlet pipe, and then slowly releases through the exhaust duct.

[0006] Preferably, the piston rod is welded by rib plates, and the cross - section of the piston rod is in a cross shape. The space between adjacent rib plates forms the air duct. The structure is simple, easy to manufacture, and has little resistance to high - pressure gas.

[0007] Preferably, the limiting boss is integrally formed on the outer wall of the rib plate. The limiting boss can also be arranged on the inner wall of the middle pipe body, but the processing is not very convenient.

[0008] Preferably, the exhaust passage is a plurality of through holes opened in the middle of the sealing plate.

[0009] Preferably, the exhaust passage is a plurality of grooves opened at the edge of the sealing plate.

[0010] Compared with the prior art, the present invention has the following advantages:

[0011] During disassembly, the reverse high-pressure gas in the air outlet pipe pushes the sealing plate to block the air inlet pipe through the air duct and the transition cavity, and then is slowly released through the exhaust passage, without strong impact force, eliminating potential safety hazards and having a good anti-injury effect. On this premise, no additional operation is required, and quick installation and disassembly can be truly achieved, with convenient operation. Description of the Drawings

[0012] Figure 1 is the front view of the non-return high-pressure air quick connector according to the first embodiment of the present invention.

[0013] Figure 2 is the state diagram when normal ventilation is carried out in the first embodiment of the present invention.

[0014] Figure 3 is the state diagram when the reverse high-pressure gas is slowly released in the first embodiment of the present invention.

[0015] Figure 4 is the structural schematic diagram of the valve core in the first embodiment of the present invention.

[0016] Figure 5 is the state diagram when the reverse high-pressure gas is slowly released in the second embodiment of the present invention.

[0017] Figure 6 is Figure 5 the enlarged view at C of

[0018] Figure 7 is the structural schematic diagram of the valve core in the second embodiment of the present invention.

[0019] Wherein, 1 is the middle pipe body, 2 is the air inlet pipe, 3 is the air outlet pipe, 4 is the transition cavity, 5 is the valve core, 51 is the piston rod, 52 is the air duct, 53 is the sealing plate, 54 is the limiting boss, and 55 is the exhaust passage. Detailed Embodiments

[0020] The present invention will be further clarified below in conjunction with the drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. After reading the present invention, various equivalent forms of modification made by those skilled in the art fall within the scope defined by the appended claims of this application.

[0021] Embodiment 1 is as follows Figures 1-4 As shown, a non - rebound high - pressure air quick - coupling includes an intermediate pipe body 1. The front end of the intermediate pipe body is hermetically connected to an air inlet pipe 2, and the air inlet pipe is used for inserting into a gas distribution header. The rear end of the intermediate pipe body is hermetically connected to an air outlet pipe 3, and the air outlet pipe is used for connecting to a branch air pipe. The end faces of the air inlet and outlet pipes inserted into the intermediate pipe body and the inner wall of the intermediate pipe body form a transition cavity 4. A valve core 5 is installed in the transition cavity. The valve core includes a piston rod 51 that is slidably connected to the air outlet pipe. The piston rod is welded by rib plates, and the cross - section of the piston rod is cross - shaped. The space between adjacent rib plates forms an air duct 52 for communicating the transition cavity and the inner cavity of the air outlet pipe. The cross - shaped piston rod has a simple structure, is convenient to manufacture, and has little resistance to high - pressure gas. One end of the piston rod extending into the transition cavity is welded with a sealing plate 53 for blocking the air inlet pipe. The outer diameter of the sealing plate is smaller than the inner diameter of the intermediate pipe body. A limiting boss 54 is provided in the transition cavity. The limiting boss is integrally formed on the outer wall of the rib plate and is used to prevent the sealing plate from blocking the air outlet pipe. An exhaust passage 55 is opened on the sealing plate. The exhaust passage is a number of through - holes opened in the middle of the sealing plate and is used to slowly release the reverse high - pressure gas in the air outlet pipe.

[0022] As follows Figures 5-7 As shown, the only difference between Embodiment 2 and Embodiment 1 is that the exhaust passage is a number of grooves opened at the edge of the sealing plate.

[0023] The specific working process and principle of a non - rebound high - pressure air quick - coupling: When normal ventilation occurs, high - pressure gas enters from the air inlet pipe, pushes the sealing plate, and the limiting boss abuts against the air outlet pipe to block the sealing plate from blocking the air outlet pipe. The high - pressure gas passes through the transition cavity and the air duct and enters the exhaust pipe. When disassembling, the reverse high - pressure gas in the air outlet pipe pushes the sealing plate to block the air inlet pipe through the air duct and the transition cavity, and then is slowly released through the exhaust passage, avoiding the jet state, not generating a strong impact force, eliminating potential safety hazards, and significantly improving the anti - injury effect. On this premise, without additional operations, it can truly achieve quick installation and disassembly, increasing convenience.

Claims

1. A non-return high-pressure air quick connector, characterized in that: It includes an intermediate pipe body. An air inlet pipe is provided at one end of the intermediate pipe body, and an air outlet pipe is provided at the other end. The air inlet and outlet pipes are inserted into the end face of the intermediate pipe body and the inner wall of the intermediate pipe body to form a transition cavity. A valve core is arranged in the transition cavity. The valve core includes a piston rod slidably connected to the air outlet pipe. The piston rod is provided with an air duct for communicating the transition cavity and the inner cavity of the air outlet pipe. One end of the piston rod extending into the transition cavity is provided with a sealing plate for blocking the air inlet pipe. The outer diameter of the sealing plate is smaller than the inner diameter of the intermediate pipe body. A limiting boss is arranged in the transition cavity for preventing the sealing plate from blocking the air outlet pipe. The sealing plate is provided with an exhaust duct for slowly releasing the reverse high-pressure gas in the air outlet pipe.

2. The non-return high-pressure air quick connector according to claim 1, characterized in that: The piston rod is welded by rib plates, and the cross-section of the piston rod is cross-shaped. The space between adjacent rib plates forms the air duct.

3. The non-return high-pressure air quick connector according to claim 2, characterized in that: The limiting boss is integrally formed on the outer wall of the rib plate.

4. The non-return high-pressure air quick connector according to claim 1, characterized in that: The exhaust duct is a number of through holes opened in the middle of the sealing plate.

5. The non-return high-pressure air quick connector according to claim 1, characterized in that: The exhaust duct is a number of grooves opened at the edge of the sealing plate.

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