A simple structure of filling and vacuuming leak detection quick connector

Abstract

The utility model provides a kind of simple structure's filling and injecting vacuum leak detection quick coupling, including connector main body, the tail portion of connector main body is equipped with stem, the head of stem is radially distributed with multiple clamping jaw pieces outside, the head of multiple clamping jaw pieces is movably connected on the tail portion of connector main body, the inside of the tail portion of multiple clamping jaw pieces is inwardly convex and forms clamping part, multiple clamping jaw pieces are slidably sleeved with movable sleeve, when the tail portion of movable sleeve is located outside the tail portion of multiple clamping jaw pieces, so that clamping part is folded to stem, when the tail portion of movable sleeve is located outside the head of multiple clamping jaw pieces, the head of multiple clamping jaw pieces can be opened, the tail portion of stem is stretched out outside clamping passage and is equipped with multiple sealing rings.The stem of the utility model is inserted into pipe fitting and is sealed between pipe fitting and stem by multiple sealing rings, leakage point is less, sealing effect is good, and the utility model has few parts, simple structure, processing, installation and operation are very convenient.

Description

Technical Field

[0001] This utility model relates to a simple quick connector for filling, vacuuming, and leak detection. Background Technology

[0002] In actual production, when pipelines need to be filled with gas and then tested for leaks in water, or when they need to be stored under gas pressure, quick-connect leak detection couplings are usually required. Especially in household appliances such as air conditioners or refrigerators, the internal pipelines of products that require refrigerant charging are functional components, and quick-connect leak detection couplings are generally used to connect the pipelines to the refrigerant source for charging.

[0003] Existing quick-connect leak detection couplings typically connect to pipe fittings via threads, which is inconvenient to install and disassemble, and time-consuming. Furthermore, the seal between the pipe fitting and the quick-connect coupling is poor, making leaks easy and resulting in unsatisfactory performance. Summary of the Invention

[0004] The purpose of this invention is to provide a simple quick-connect fitting for filling, vacuuming, and leak detection, which can solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: A simple quick-connect fitting for filling, vacuuming, and leak detection includes a fitting body. The head of the fitting body has a universal connector, and the tail of the fitting body has a rod. A fluid channel passes through the rod and the fitting body. Multiple clamping claws are radially evenly distributed along the outer edge of the head of the rod. The heads of the multiple clamping claws are movably connected to the tail of the fitting body. The inner sides of the tails of the multiple clamping claws protrude inward to form clamping portions. The multiple clamping portions surround the rod and form a clamping channel with the rod. A movable sleeve is slidably fitted onto the outside of the gripper pieces. When the tail of the movable sleeve is outside the tails of the multiple gripper pieces, the clamping part retracts towards the rod body, and the movable sleeve is limited by a limiting structure to be in that position. When the tail of the movable sleeve is outside the heads of the multiple gripper pieces, the heads of the multiple gripper pieces can open, and the movable sleeve is limited by the limiting structure to be in that position. The tail of the rod body extends out of the clamping channel, and multiple sealing rings are arranged side by side on the outer wall of the tail of the rod body.

[0006] Preferably, the gripper includes an arc-shaped plate-like body. A groove is recessed on the inner wall of the head of the arc-shaped plate-like body, and the clamping part is protruding on the inner wall of the tail of the arc-shaped plate-like body. A stop protrusion for limiting the movement of the outer side of the tail of the movable sleeve is protruding on the outer wall of the tail of the arc-shaped plate-like body. A retaining ring is provided on the tail of the connector body. The retaining ring is placed in the groove and is movable. A movable groove is formed on the side of the retaining ring near the connector body. The head of the arc-shaped plate-like body is placed in the movable groove and is movable.

[0007] Preferably, the head of the arc-shaped sheet-like body has constriction slopes on both radial sides.

[0008] Preferably, the outer side of the clamping part is provided with a guide slope.

[0009] Preferably, the limiting structure includes an L-shaped groove and a positioning element. The L-shaped groove is disposed on the movable sleeve and includes a horizontal groove and a vertical groove. The vertical groove is disposed along the axial direction of the movable sleeve, and the horizontal groove is disposed along the radial direction of the movable sleeve. The positioning element is installed on the connector body and can slide in the L-shaped groove.

[0010] Preferably, the positioning element is a positioning screw, and the connector body is provided with a threaded hole, with the end of the positioning screw fixed in the threaded hole.

[0011] Preferably, the outer side of the transverse groove is flush with the end face of the movable sleeve and forms an opening.

[0012] Preferably, the number of gripper plates is three or four.

[0013] Preferably, a limiting shoulder is formed on the inner side of the plurality of clamping portions.

[0014] Preferably, the head of the connector body is connected to one end of a right-angle bend via a thread, and the other end of the right-angle bend is connected to the universal connector via a thread.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The rod of this utility model extends into the pipe fitting and is sealed between the pipe fitting and the rod body by multiple sealing rings. Then, the fluid channel in the rod body directly fills, detects leaks, or evacuates the pipe fitting, resulting in fewer leak points and better sealing effect. 2. The clamping structure of this utility model consists of multiple clamping jaws, a movable sleeve, and a limiting structure. It has fewer parts, a simple structure, and is very convenient to process, install, and operate. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the present invention.

[0017] Figure 2 This is the front view of the movable sleeve of this utility model.

[0018] Figure 3 This is a perspective view of the gripper plate of this utility model. Detailed Implementation

[0019] 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.

[0020] like Figure 1 , Figure 2 , Figure 3 As shown, this utility model provides a simple quick-connect fitting for filling, vacuuming, and leak detection, including a fitting body 1. The head of the fitting body 1 is provided with a universal connector 2. The universal connector 2 can be directly connected to the fitting body 1, or indirectly connected to the fitting body 1 through a right-angle bend 3. Specifically, the head of the fitting body 1 is connected to one end of a right-angle bend 3 by a thread, and the other end of the right-angle bend 3 is connected to the universal connector 3 by a thread. The tail of the connector body 1 is provided with a rod 4, through which a fluid channel 5 passes. Multiple gripper pieces 6 are radially evenly distributed along the outer edge of the head of the rod 4. The heads of the gripper pieces 6 are movably connected to the tail of the connector body 1. The inner sides of the tails of the gripper pieces 6 protrude inward to form clamping portions 7. The clamping portions 7 surround the rod 4 and form a clamping channel 8 between them. A movable sleeve 9 is slidably fitted onto the outer side of the gripper pieces 6. When the tail of the movable sleeve 9 is outside the tails of the gripper pieces 6, the clamping portions 7 retract towards the rod 4, and a limiting structure limits the movable sleeve 9 to this position. When the tail of the movable sleeve 9 is outside the heads of the gripper pieces 6, the gripper pieces 6... The head can open, and the limiting structure limits the movable sleeve 9 to be in that position. The tail of the rod 4 extends out of the clamping channel 8, and multiple sealing rings 10 are arranged side by side on the outer wall of the tail of the rod 4.

[0021] In use, the tail of the movable sleeve 9 is first positioned outside the heads of the multiple gripper pieces 6. The tails of the multiple gripper pieces 6 are not constrained and can open under external force. When the external tube is fitted over the tail of the rod body 4, the tails of the multiple gripper pieces 6 are opened by the external tube. After the external tube is fitted over the rod body 4, the multiple sealing rings 10 on the rod body 4 seal between the rod body 4 and the inner wall of the external tube, forming multiple seals. The entire product does not require other sealing structures, has few leakage points, and has a good sealing effect. Then, the movable sleeve 9 is pushed so that its tail is outside the tails of the multiple gripper plates 6. The tail of the movable sleeve 9 causes the tails of the multiple gripper plates 6 to retract, and the clamping part 7 of the tail of the gripper plate 6 retracts towards the rod body 4 to clamp the external pipe fitting. The movable sleeve 9 is then limited to this position by the limiting structure so that the clamping part 7 of the gripper plate 6 continues to firmly clamp the external pipe fitting. Then, a gas source is connected through the universal connector 2 to perform leak detection on the object to be leaked, or a refrigerant charging machine is connected through the universal connector 2 to charge refrigerant into equipment such as air conditioners, or a vacuum pump is connected through the universal connector 2 to perform vacuuming on the object to be vacuumed. After refrigerant charging, leak detection, or vacuuming is completed, the movable sleeve 9 is pushed in the reverse direction so that its tail is outside the heads of the multiple gripper plates 6. A limiting structure then restricts the movable sleeve 9 to this position, preventing it from moving outside the heads of the gripper plates 6. With the tails of the gripper plates 6 unrestrained, the external pipe fitting is released and can be removed. The pipe clamping structure of this invention consists of multiple gripper plates 6, a movable sleeve 9, and a limiting structure. It has few parts, a simple structure, and is very convenient to process, install, and operate.

[0022] Preferably, the gripper piece 6 includes an arc-shaped sheet body 61. The inner wall of the head of the arc-shaped sheet body 61 is recessed with a groove 62, and the inner wall of the tail of the arc-shaped sheet body 61 is protruded with the clamping part 7. The outer wall of the tail of the arc-shaped sheet body 61 is protruded with a stop protrusion 63 for limiting the outer side of the tail of the movable sleeve 9. A retaining ring 11 is provided on the tail of the connector body 1. The retaining ring 11 is placed in the groove 62 and can move. A movable groove 12 is formed on the side of the retaining ring 11 near the connector body 1. The head of the arc-shaped sheet body 61 is placed in the movable groove 12 and can move. The head of the arc-shaped sheet body 61 is movably connected to the connector body 1 through the engagement of the retaining ring 11 with the retaining groove 62. Under the restriction of the movable sleeve 9, the head of the arc-shaped sheet body 61 moves in the movable groove 12. The retaining protrusion 63 of the arc-shaped sheet body 61 is restricted to the outer side of the tail of the movable sleeve 9, which can prevent the movable sleeve 9 from moving out from the tail direction of the arc-shaped sheet body 61.

[0023] Preferably, the head of the arc-shaped sheet body 61 is provided with constriction slopes 64 on both radial sides. When the head of the arc-shaped sheet body 61 moves into the movable groove 12, a constriction space is formed between the constriction slopes 64 of the two arc-shaped sheet bodies 61, which facilitates the movement of the arc-shaped sheet body 61.

[0024] Preferably, the outer side of the clamping part 7 is provided with a guide slope 65 to facilitate the insertion of external pipe fittings between the clamping part 7 and the rod body 4.

[0025] Preferably, the limiting structure includes an L-shaped groove 13 and a positioning element 14. The movable sleeve 9 is cylindrical. The L-shaped groove 13 is provided on the movable sleeve 9. The L-shaped groove 13 includes a horizontal groove and a vertical groove. The vertical groove is arranged along the axial direction of the movable sleeve 9, and the horizontal groove is arranged along the radial direction of the movable sleeve 9. The positioning element 14 is installed on the connector body 1 and can slide in the L-shaped groove 13. The movable sleeve 9, fitted over the gripper piece 6, can move axially or rotate radially relative to the connector body 1, constrained by the L-shaped groove 13 and the positioning element 14. Specifically, when the positioning element 14 slides in the vertical groove of the L-shaped groove 13, the movable sleeve 9 can move axially relative to the connector body 1. When the positioning element 14 is at the end of the vertical groove, the tail of the movable sleeve 9 is outside the head of the gripper piece 6, ensuring that the tail of the gripper piece 6 opens and preventing the movable sleeve 9 from moving out of the head of the gripper piece 6, thus ensuring that the head of the gripper piece 6 is movably mounted on the connector body 1. When the positioning element 14 slides in the horizontal groove of the L-shaped groove 13, the movable sleeve 9 can rotate radially relative to the connector body 1. When the positioning element 14 is at the end of the horizontal groove, the tail of the movable sleeve 9 is outside the tail of the gripper piece 6, allowing the gripper piece 6 to be in a clamping state. Preferably, the positioning element 14 is a positioning screw, and the connector body 1 is provided with a threaded hole. The end of the positioning screw is fixed in the threaded hole, which is convenient for installation.

[0026] Preferably, the outer side of the transverse groove is flush with the end face of the movable sleeve 9 and forms an opening, which is convenient for processing and assembly.

[0027] Preferably, the number of gripper pieces 6 is three or four, which is a more reasonable design.

[0028] Preferably, the inner side of the plurality of clamping parts 7 is formed with a limiting shoulder 66, and a protrusion is formed on the outer pipe. When the clamping part 7 is clamped on the outer pipe, the limiting shoulder 66 blocks the outside of the protrusion, which can prevent the clamping part 7 from failing to clamp the outer pipe due to excessive air pressure inside the outer pipe, making it safer to use.

[0029] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A simple quick-connect coupling for filling, vacuuming, and leak detection, comprising a coupling body, wherein the head of the coupling body is provided with a universal connector, characterized in that: The connector body has a rod at its tail end, through which a fluid channel passes. Multiple gripper pieces are radially evenly distributed along the outer edge of the rod's head. The heads of these gripper pieces are movably connected to the tail end of the connector body. The inner sides of the tail ends of the gripper pieces protrude inwards to form clamping portions. These clamping portions surround the rod and form a clamping channel with the rod. A movable sleeve is slidably fitted over the gripper pieces. When the tail end of the movable sleeve is outside the tail ends of the gripper pieces, the clamping portions retract towards the rod, and a limiting structure limits the movable sleeve to this position. When the tail end of the movable sleeve is outside the heads of the gripper pieces, the heads of the gripper pieces can open, and the limiting structure limits the movable sleeve to this position. The tail end of the rod extends beyond the clamping channel, and multiple sealing rings are arranged side-by-side on the outer wall of the tail end of the rod.

2. The simple filling, vacuuming, and leak detection quick connector according to claim 1, characterized in that: The gripper includes an arc-shaped plate-like body. A groove is recessed on the inner wall of the head of the arc-shaped plate-like body, and the clamping part is protruding on the inner wall of the tail of the arc-shaped plate-like body. A stop protrusion for limiting the movement of the outer side of the tail of the movable sleeve is protruding on the outer wall of the tail of the arc-shaped plate-like body. A retaining ring is provided on the tail of the connector body. The retaining ring is placed in the groove and is movable. A movable groove is formed on the side of the retaining ring near the connector body. The head of the arc-shaped plate-like body is placed in the movable groove and is movable.

3. The simple filling, vacuuming, and leak detection quick connector according to claim 2, characterized in that: The head of the arc-shaped sheet-like body has constriction slopes on both radial sides.

4. The simple filling, vacuuming, and leak detection quick connector according to claim 2, characterized in that: The outer side of the clamping part is provided with a guide slope.

5. The simple filling, vacuuming, and leak-detecting quick connector according to any one of claims 1-4, characterized in that: The limiting structure includes an L-shaped groove and a positioning element. The L-shaped groove is provided on the movable sleeve. The L-shaped groove includes a horizontal groove and a vertical groove. The vertical groove is arranged along the axial direction of the movable sleeve, and the horizontal groove is arranged along the radial direction of the movable sleeve. The positioning element is installed on the connector body and can slide in the L-shaped groove.

6. The simple filling, vacuuming, and leak detection quick connector according to claim 5, characterized in that: The positioning element is a positioning screw, and the connector body is provided with a threaded hole, the end of which is fixed in the threaded hole.

7. The simple filling, vacuuming, and leak detection quick connector according to claim 5, characterized in that: The outer side of the transverse groove is flush with the end face of the movable sleeve and forms an opening.

8. The simple filling, vacuuming, and leak-detecting quick connector according to any one of claims 1-4, characterized in that: The number of gripper plates is three or four.

9. The simple filling, vacuuming, and leak-detecting quick connector according to any one of claims 1-4, characterized in that: Limiting shoulders are formed on the inner sides of the plurality of clamping parts.

10. The simple filling, vacuuming, and leak-detecting quick connector according to any one of claims 1-4, characterized in that: The head of the connector body is connected to one end of a right-angle bend via a thread, and the other end of the right-angle bend is connected to the universal connector via a thread.

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