The application discloses a high-safety refrigerant-filling, vacuum-pumping and leak-detecting quick connector

Abstract

The utility model provides a kind of high safety of refrigerant, vacuumizing, leak detection quick connector, including connector main body, fluid through-hole is equipped in connector main body, the tail portion inside connector main body is equipped with connecting through-hole, recessed sealing groove is equipped between the tail portion of fluid through-hole and the inner end of connecting through-hole, O-shaped sealing ring is equipped in sealing groove, internal thread is equipped on the inner wall of connecting through-hole, the inner wall of connecting through-hole is also axially equipped with pressure relief groove, the end of pressure relief groove is flush with the end face of the tail portion of connector main body, the other end at least exceeds half of the axial length of connecting through-hole.The utility model when the connector main body is twisted from the outside pipe and is removed, when the inner end of outside pipe moves to the outside of pressure relief groove but does not come out completely from internal thread section, the air pressure in connector main body can be discharged from pressure relief groove, continue to twist down connector main body, can effectively prevent connector main body from being quickly removed from outside pipe under high air pressure, avoid impact to operator or surrounding articles, use is very safe.

Description

TECHNICAL FIELD

[0001] The utility model relates to a high security's quick -witted joint of filling refrigerant, pumping vacuum, leak detection. BACKGROUND

[0002] The prior art quick -witted joint mainly includes quick -witted joint body, and the tail of quick -witted joint body is equipped with the internal thread for being connected with outside, and the external pipe piece that needs to be connected with quick -witted joint is equipped with the external thread matched with internal thread, and the end of external pipe piece is arranged between the sealing pad of quick -witted joint body.In operation, quick -witted joint body can be twisted on external pipe piece manually or by pneumatic gun, and sealing pad is easily deformed due to the rotation extrusion of external pipe piece, and the sealing effect is poor.Quick -witted joint is used, and its internal gas pressure is relatively big, when quick -witted joint body is twisted off from external pipe piece, quick -witted joint body will quickly separate from external pipe piece under the action of high gas pressure, and it is easy to impact operator or surrounding articles, and the use is not very safe. SUMMARY

[0003] The utility model discloses a high security's quick -witted joint of filling refrigerant, pumping vacuum, leak detection can solve the technical problem mentioned in the background art.

[0004] In order to realize the above-mentioned purpose, the technical scheme of the utility model is as follows: a high security's quick -witted joint of filling refrigerant, pumping vacuum, leak detection, including the joint body, be equipped with fluid through -hole in this joint body, the head of this joint body is equipped with universal joint, the tail of joint body is equipped with the connection through -hole in, recessed with sealing groove between the tail of fluid through -hole and the inner end of connection through -hole, be equipped with O -ring seal in this sealing groove, be equipped with internal thread on the inner wall of connection through -hole, the inner wall of connection through -hole is also axially equipped with pressure relief groove, one end of pressure relief groove is flush with the end face of the tail of joint body, the other end of pressure relief groove at least exceeds half of the axial length of connection through -hole.

[0005] As preferred, the other end of the pressure relief groove is in communication with the sealing groove.

[0006] As preferred, the cross section of the pressure relief groove is semicircular, triangular or square.

[0007] As preferred, the width of the pressure relief groove is 1-2mm, and the depth is 1-2mm.

[0008] As preferred, the inner diameter of the O-ring seal is larger than the inner diameter of the connection through-hole and smaller than the inner diameter of the fluid through-hole.

[0009] As preferred, the outer surface of the joint body is polygonal.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The O-ring seal of this utility model is sealed between the outer wall of the external pipe fitting and the inner wall of the connector body. When the connector body is screwed onto the external pipe fitting, the external pipe fitting will not squeeze the O-ring seal, so the O-ring seal will not deform, resulting in a good sealing effect. 2. The O-ring seal of this utility model is installed in the sealing groove and will not fall off during use, ensuring reliable installation. 3. When unscrewing the connector body from the external pipe fitting, when the inner end of the external pipe fitting moves to the outside of the pressure relief groove but does not completely disengage from the internal thread section, the air pressure inside the connector body can be released from the pressure relief groove. Then, continue to unscrew the connector body. This effectively prevents the connector body from quickly detaching from the external pipe fitting under high air pressure, avoiding impact on the operator or surrounding objects, making it very safe to use. Attached Figure Description

[0011] Figure 1 This is the front view of this utility model.

[0012] Figure 2 This is a bottom view of the present invention. Detailed Implementation

[0013] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0014] like Figure 1 , Figure 2 As shown, this utility model provides a highly safe quick connector for refrigerant charging, vacuuming, and leak detection, including a connector body 1. The connector body 1 has a fluid through hole 2. The head of the connector body 1 has a universal connector 3. The tail of the connector body 1 has a connecting through hole 4. A sealing groove 5 is recessed between the inner end of the connecting through hole 4 and the tail of the fluid through hole 2. An O-ring 6 is provided in the sealing groove 5. An internal thread 7 is provided on the inner wall of the connecting through hole 4. A pressure relief groove 8 is also provided axially on the inner wall of the connecting through hole 4. One end of the pressure relief groove 8 is flush with the end face of the tail of the connector body 1, and the other end of the pressure relief groove 8 exceeds at least half of the axial length of the connecting through hole 4.

[0015] The utility model discloses when using, the outer wall of external pipe spare is provided with the outer thread matched with the internal thread 7 in the connecting through -hole 4, twists the joint main part 1 on the external pipe spare, and the inner end of external pipe spare is inserted into the joint main part 1 and is opposite with fluid through -hole 2, and O -ring seal 6 is sealed between the outer wall of external pipe spare and the inner wall of joint main part 1, when twisting joint main part 1, external pipe spare will not extrude O -ring seal 6, then O -ring seal 6 will not be deformed, and the sealing effect is good, and O -ring seal 6 is installed in sealing groove 5, and will not fall in the use process, and the installation is reliable. Then through universal joint 3 connects the gas source to carry out leak detection to the object to be detected, or through universal joint 3 connects the refrigerant filling machine to carry out the filling refrigerant to the equipment such as air conditioner, or through universal joint 3 connects the air pump to carry out vacuumizing to the object to be extracted. When twisting down joint main part 1 from external pipe spare, when the inner end of external pipe spare moves to the outside of pressure relief groove 8 but does not come out completely from internal thread 7 section, the air pressure in joint main part 1 can be discharged from pressure relief groove 8, then continues to twist down joint main part 1, can effectively prevent joint main part 1 from being quickly taken off from external pipe spare under high air pressure, avoids impacting to operator or surrounding articles, and use is very safe.

[0016] As preferred, the other end of the pressure relief groove 8 is communicated with the sealing groove 5, which is convenient to process. Because the sealing groove 5 is provided with the O-ring seal 6, after the external pipe is inserted into the joint main body 1, the fluid in the fluid through hole 2 of the joint main body 1 directly flows into the external pipe through the sealing of the O-ring seal 6, and will not leak from the sealing groove 5 and the pressure relief groove 8.

[0017] As preferred, the cross section of the pressure relief groove 8 is semicircular, the radius of the pressure relief groove is 1-2mm, that is, the width of the pressure relief groove is 1-2mm, and the depth is 1-2mm; or the cross section of the pressure relief groove 8 is triangular, the base length of the pressure relief groove is 1-2mm, and the height is 1-2mm, that is, the width of the pressure relief groove is 2-1mm, and the depth is 1-2mm; or the cross section of the pressure release groove 8 is square, the side length of the square is 1-2mm, that is, the width of the pressure relief groove is 3-1mm, and the depth is 1-2mm. The pressure relief groove 8 is designed skillfully, which can not only meet the function of pressure relief, but also can ensure the wall thickness of the joint main body 1, thereby ensuring the strength of the joint main body 1.

[0018] As preferred, the inner diameter of the O-ring seal 6 is greater than the inner diameter of the connecting through hole 4 and less than the inner diameter of the fluid through hole 2, which can not only facilitate the butt joint of the external pipe and the fluid through hole 2 of the joint main body 1, but also can be well sealed between the external pipe and the joint main body 1, and the sealing effect is good.

[0019] As preferred, the outer surface of the joint main body 1 is polygonal, which is convenient to twist the joint main body by using electric tools.

[0020] Although the embodiments of the present application have been disclosed as above, it is not limited to the application listed in the specification and the embodiments, and it can be applied to various fields suitable for the present application. For those skilled in the art, other modifications can be easily realized, and therefore the present application is not limited to specific details and the figures shown and described herein.

Claims

1. A high-safety quick connector for refrigerant charging, vacuuming, and leak detection, comprising a connector body, wherein the connector body has a fluid through-hole, and the head of the connector body has a universal connector, characterized in that: The connector body has a connecting through hole at its tail end. A sealing groove is recessed between the inner end of the connecting through hole and the tail end of the fluid through hole. An O-ring is provided in the sealing groove. The inner wall of the connecting through hole has an internal thread. The inner wall of the connecting through hole also has an axial pressure relief groove. One end of the pressure relief groove is flush with the end face of the tail end of the connector body, and the other end of the pressure relief groove exceeds at least half the axial length of the connecting through hole.

2. The high-safety quick connector for refrigerant charging, vacuuming, and leak detection according to claim 1, characterized in that: The other end of the pressure relief groove is connected to the sealing groove.

3. The high-safety quick connector for refrigerant charging, vacuuming, and leak detection according to claim 1 or 2, characterized in that: The cross-section of the pressure relief groove is semi-circular, triangular, or square.

4. The high-safety quick connector for refrigerant charging, vacuuming, and leak detection according to claim 3, characterized in that: The pressure relief groove has a width of 1-2 mm and a depth of 1-2 mm.

5. The high-safety quick connector for refrigerant charging, vacuuming, and leak detection according to claim 1 or 2, characterized in that: The inner diameter of the O-ring is larger than the inner diameter of the connecting through hole but smaller than the inner diameter of the fluid through hole.

6. The high-safety quick connector for refrigerant charging, vacuuming, and leak detection according to claim 1 or 2, characterized in that: The outer surface of the connector body is polygonal.

Images