Pneumatic connector

Abstract

According to the technical scheme, the pneumatic connector is characterized by comprising a connector body, one end of the connector body is provided with an air inlet end, the other end of the connector body is provided with an air outlet end, and the side, close to the air inlet end, of the connector body is connected with a packing threaded block; the joint body is provided with a pressure reducing device, and the pressure reducing device comprises an air inlet rod and an air outlet rod. Bottom blocks with inclined planes are arranged at the bottom ends of the air inlet rod and the air outlet rod, and the air inlet rod is matched with the air outlet rod through the inclined planes. A T-shaped top block is arranged at the top end of the air inlet rod, through holes are evenly distributed in the periphery of the T-shaped top block, and the connector body is provided with a cavity A matched with the top block. And a spring is sleeved on the air outlet rod. And the air inlet end is provided with a transition surface with low left and high right. Air pressure at the connector is reduced through the pressure reducing device when the pressure in the system is too high, the protection effect on connector connection is achieved, and connection of the connector and the hose is reinforced through cooperation of the pressing threaded block and the transition face.

Description

Technical Field

[0001] The utility model relates to the technical field of connectors, and more specifically, to a pneumatic connector. Background Art

[0002] A pneumatic connector is a quick connector mainly used for air piping and pneumatic tools. It is a connector that can achieve the connection or disconnection of pipelines without tools, and is used to supply compressed air from the air source to pneumatic tools. It can be applied to pneumatic tools such as air pipelines, air compressors, grinders, air drills, impact wrenches, and pneumatic screwdrivers.

[0003] However, there are still some defects in the above-mentioned prior art. The structure of the pneumatic connector in the prior art is relatively simple. Usually, the connecting pipe is directly inserted into the pneumatic connector. After the connecting pipe is inserted into the pneumatic connector, due to the change in air pressure and the lack of protection measures at the joint, it is easy for the connecting pipe to be separated from the pneumatic connector. Summary of the Utility Model

[0004] To achieve the above object, the utility model provides the following technical solution: A pneumatic connector includes a connector body. One end of the connector body is provided with an air inlet end, and the other end of the connector body is provided with an air outlet end. There is an external thread on one side of the connector body close to the air inlet end, and the external thread is connected with a tightening thread block with an internal thread. The tightening thread block is movable at the air inlet end; the connector body is provided with a pressure reducing device, and the pressure reducing device includes an air inlet rod and an air outlet rod; there are bottom blocks with inclined surfaces at the bottom ends of the air inlet rod and the air outlet rod, and the air inlet rod and the air outlet rod are matched through the inclined surfaces.

[0005] The utility model is further provided as: The top end of the air inlet rod has a T-shaped top block, and there are uniformly arranged through holes around the T-shaped top block. The connector body has a cavity A that is matched with the top block.

[0006] The utility model is further provided as: A spring is sleeved on the air outlet rod.

[0007] The utility model is further provided as: The air inlet end has a transition surface that is lower on the left and higher on the right.

[0008] The utility model is further provided as: The air inlet end is communicated with the air outlet end through an air pipe joint.

[0009] The utility model is further provided as: There is a locking nut on the connector body. There is a cavity B in the locking nut, and the pressure reducing device is arranged in the cavity B.

[0010] The utility model is further provided as: The air inlet rod and the air outlet rod adopt an integrated design.

[0011] In summary, the utility model has the following beneficial effects: When the pressure in the system is too high, the pressure reducing device reduces the air pressure at the interface, protecting the connection of the joint. The self-locking property of the thread of the tightening thread block and the cooperation of the transition surface strengthen the connection between the joint and the hose. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of this embodiment;

[0013] Figure 2 is a partial enlarged view of part A of this embodiment;

[0014] Reference numerals: 1, joint body; 11, air inlet end; 12, air outlet end; 13, transition surface; 2, tightening thread block; 3, pressure reducing device; 31, air inlet rod; 311, through hole; 312, cavity A; 313, T-shaped top block; 32, air outlet rod; 33, spring; 4, locking nut; 41, cavity B. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The following further describes the present utility model in detail with reference to the accompanying drawings.

[0016] This embodiment discloses a pneumatic joint, as Figure 1 shown, including a joint body 1. One end of the joint body 1 is provided with an air inlet end 11 for gas to enter, and the other end of the joint body 1 is provided with an air outlet end 12 for gas to flow out. The air inlet end 11 is communicated with the air outlet end 12 through a pipe joint. The joint body 1 has an external thread for threaded connection on one side close to the air inlet end 11. The external thread is connected with a tightening thread block 2 with an internal thread. The tightening thread block 2 is movable at the air inlet end 11. The air inlet end 11 has a transition surface 13 that is lower on the left and higher on the right. The minimum diameter of the left end of the tightening thread block 2 is smaller than the maximum diameter of the air inlet end 11 of the joint body 1, but larger than the minimum diameter of the joint body 1. So that the smallest diameter point of the left end of the tightening thread block 2 can press on the transition surface 13 of the air inlet end 11, so that the hose sleeved on the air inlet end 11 can be tightly pressed on the transition surface 13 when the tightening thread block 2 moves to the right, enhancing the friction between the transition surface 13 and the hose, strengthening the connection state of the hose, and improving the reliability of the connection.

[0017] Such as Figure 2As shown in the figure, there is a locking nut 4 on the joint body 1. There is a cavity B41 inside the locking nut 4, and a pressure reducing device 3 is arranged inside the cavity B41, making the appearance of this utility model simple and generous without being obtrusive. The pressure reducing device 3 includes an air inlet rod 31 and an air outlet rod 32. The bottom ends of the air inlet rod 31 and the air outlet rod 32 are provided with bottom blocks with inclined surfaces, and the air inlet rod 31 and the air outlet rod 32 are matched through the inclined surfaces. The top end of the air inlet rod 31 is provided with a T-shaped top block 313, and through holes 311 are evenly arranged around the T-shaped top block 313. The joint body is provided with a cavity A312 that is matched with the top block. A spring 33 is sleeved on the air outlet rod 32. When the air pressure in the system increases, the pressure acts on the T-shaped top block 313 and is transmitted to the air inlet rod 31, and the thrust is transmitted to the air outlet rod 32 through the matched inclined surfaces. When the air pressure is large enough, the pressure overcomes the elastic force of the spring 33 to make the spring 33 contract, the T-shaped top block 313 is lifted, the air inlet rod 31 moves inward, and the air outlet rod 32 moves outward. The air flow in the system flows into the inside of the cavity B41 from the through holes 311 on the side of the T-shaped top block 313 and then flows out from the through holes 311 where the air outlet rod 32 moves, reducing the air pressure in the system and protecting the connection of the pneumatic joint. When it is necessary to remove the connection, there may be some residual air pressure in the system. At this time, if the connection is directly removed, the high-pressure gas in the system will spray out at the interface, posing a safety hazard to the workers. Pull the external convex block of the pressure reducing device 3 to manually activate the pressure reducing device 3. If there is residual pressure in the system, the gas will be released from the pressure reducing device 3, reducing the safety hazard.

[0018] For further improvement, the pressure reducing device 3 is installed in the cavity B41, with a compact structure. The air inlet rod 31 and the air outlet rod 32 in the pressure reducing device 3 adopt an integrated design, which can obtain better airtightness, reduce the air leakage phenomenon generated when the pressure reducing device 3 is not needed, and improve the effectiveness, reliability, compactness and convenience of the pressure reducing device 3.

[0019] The working principle of this utility model

[0020] When using the present invention, separate the joint body and the tightening thread block 2 placed together, insert the hose through the small-diameter side of the tightening thread block 2, then slip the hose over the air inlet end 11 of the joint body so that the hose nozzle can cover the transition surface 13. Then rotate the tightening thread block 2 along the thread of the joint body to move the tightening thread block 2 to the right until the small-diameter opening at the left end of the tightening thread block 2 fits tightly with the hose and presses against the transition surface 13, strengthening the connection of the hose and making the connection of the present invention firm and reliable. When the pressure in the system is small, the air flow will only pass through the interface. Since the connection force of the hose is the frictional force between the hose and the connecting device, when the pressure in the system is large, the air pressure presses against the pipe wall, reducing the frictional force between the hose and the joint, and there is a risk of the hose coming off. The pressure reducing device 3 is activated to protect the joint connection by reducing the pressure in the system, increasing the reliability of the present invention. When disassembling, the pressure reducing device 3 can also be manually activated to avoid injuries caused by the residual pressure in the system during disassembly.

[0021] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the design concept of the present invention shall be included within the protection scope of the present invention.

Claims

1. A pneumatic joint, comprising a joint body (1), characterized in that: The joint body (1) is provided with an air inlet end (11) at one end and an air outlet end (12) at the other end; the joint body (1) has an external thread on one side close to the air inlet end (11); the external thread is connected to a tightening thread block (2) with an internal thread; the tightening thread block (2) is movable at the air inlet end (11); the joint body (1) is provided with a pressure reducing device (3); the pressure reducing device (3) comprises an air inlet rod (31) and an air outlet rod (32); the bottom ends of the air inlet rod (31) and the air outlet rod (32) have bottom blocks with inclined surfaces; the air inlet rod (31) and the air outlet rod (32) are matched with each other through the inclined surfaces.

2. A pneumatic joint according to claim 1, characterized in that: The top of the air inlet rod (31) is provided with a T-shaped top block (313), the T-shaped top block (313) has evenly arranged through holes (311) around it, and the joint body (1) has a cavity A (312) that matches the top block.

3. A pneumatic joint according to claim 1, characterized in that: The air outlet rod (32) is sleeved with a spring (33).

4. A pneumatic joint according to claim 1, characterized in that: The air inlet end (11) has a transition surface (13) which is lower on the left and higher on the right.

5. A pneumatic joint according to claim 1, characterized in that: The air inlet end (11) is connected to the air outlet end (12) via an air pipe joint.

6. A pneumatic joint according to claim 1, characterized in that: The joint body is provided with a locking nut (4), the locking nut (4) has a cavity B (41) in it, and the cavity B (41) has a pressure reducing device (3) in it.

7. A pneumatic joint according to claim 1, characterized in that: The air inlet rod (31) and the air outlet rod (32) are of integrated design.

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