Leak-proof fluorinated tube

Abstract

The utility model discloses a prevent leakage fluorine adding pipe, including quick -wired female head, connecting hose, connecting pipe, sealing washer and quick -wired cap, the connecting hose one end is connected with quick -wired female head, and the connecting hose other end is connected with connecting pipe, quick -wired female head is by main body pipe, movable cover and spring composition, is equipped with annular installation groove on main body pipe inner wall, and the first sealing ring is embedded in annular installation groove, be equipped with a plurality of side holes on main body pipe lateral wall, and side hole is located on same circle, and annular installation groove is closer to connecting hose than side hole, and every side hole is equipped with a steel ball, and steel ball penetrates side hole, the utility model discloses a quick -wired female head setting in the one end of connecting hose, and quick -wired female head cooperates with the quick -wired male head on fluorine adding surface valve, makes fluorine adding pipe and fluorine adding surface valve's junction not easy to appear leakage phenomenon, and fluorine adding pipe and fluorine adding surface valve can quick dismounting.

Description

Technical Field

[0001] This utility model relates to the technical field of fluorine addition, and in particular to the technical field of fluorine addition pipes. Background Technology

[0002] Adding refrigerant (Freon) can generally be defined as adding refrigerant to an air conditioner. This involves using a refrigerant charging hose, a vacuum pressure gauge with a three-way valve, a bottle opening valve, and a refrigerant cylinder to add refrigerant (Freon) into the air conditioner compressor. Currently, most air conditioner refrigerant charging hoses on the market are lock-fit type. When connecting such hoses to the refrigerant charging gauge valve, they are connected by a threaded connection. This connection method is prone to leakage at the connection point between the refrigerant charging hose and the refrigerant charging gauge valve. Summary of the Invention

[0003] The purpose of this utility model is to solve the problems in the prior art by proposing a leak-proof refrigerant charging pipe that prevents leakage at the connection between the refrigerant charging pipe and the refrigerant charging valve, and allows for quick assembly and disassembly of the refrigerant charging pipe and the refrigerant charging valve.

[0004] To achieve the above objectives, this utility model proposes a leak-proof refrigerant charging hose, comprising a quick-connect female connector, a connecting hose, a connecting pipe, a sealing washer, and a quick-tightening nut. One end of the connecting hose is connected to the quick-connect female connector, and the other end is connected to the connecting pipe. The quick-connect female connector consists of a main body tube, a movable sleeve, and a spring. An annular mounting groove is provided on the inner wall of the main body tube, and a first sealing ring is embedded within the annular mounting groove. Several side holes are provided on the side wall of the main body tube, located on the same circumference. The annular mounting groove is closer to the connecting hose than the side holes. Each side hole is equipped with a steel ball, which penetrates the side hole. A limiting wall is provided at the end of the side hole near the inner wall of the main body tube to abut the steel ball. A movable sleeve is fitted around the outside of the tube. A limiting ring is located on the inner wall of the movable sleeve, with its inner wall abutting against a steel ball. A convex ring is located on the outside of the main tube. A spring, always under compression, is sandwiched between the convex ring and the limiting ring. The spring is fitted around the outside of the first connector. An annular embedding groove is located on the outer wall of the main tube. The annular embedding groove, the limiting ring, and the convex ring are arranged along the direction close to the connecting hose. A retaining ring is embedded in the annular embedding groove, with a portion of the retaining ring located outside the groove, abutting against the limiting ring. The distance between the inner wall of the movable sleeve and the outer wall of the area containing the side hole of the main tube is less than the outer diameter of the steel ball. The distance between the inner wall of the area containing the side hole of the main body tube and the outer wall of the steel ball is greater than the outer diameter of the steel ball. One end of the connecting hose is inserted into the interior of the main body tube of the quick-connect female connector. A fixing tube is inserted into the end of the connecting hose inserted into the main body tube. The outer wall of the fixing tube is in close contact with the inner wall of the connecting hose, and the outer wall of the connecting hose is in close contact with the inner wall of the main body tube. The connecting hose consists of a first tube body and a second tube body connected together. A portion of the first tube body is inserted into the connecting hose. A compression sleeve is fitted onto the end of the connecting hose inserted into the first tube body. The outer wall of the first tube body is in close contact with the inner wall of the connecting hose, and the outer wall of the connecting hose is in close contact with the inner wall of the compression sleeve. The outer diameter of the second tube body is greater than the outer diameter of the first tube body. The outer connection of the first and second pipes forms an outer abutment surface. The inner diameter of the second pipe is larger than that of the first pipe. The inner connection of the first and second pipes forms an inner abutment surface. A sealing gasket is inserted inside the second pipe. One end of the sealing gasket abuts against the inner abutment surface, and the other end of the sealing gasket is located outside the second pipe. The outer wall of the sealing gasket is in close contact with the inner wall of the second pipe. One end of the quick-tight nut is provided with a blocking ring. The blocking ring is fitted outside the first pipe. The inner diameter of the blocking ring is smaller than that of the second pipe. The inner diameter of the quick-tight nut is larger than that of the second pipe. When the blocking ring abuts against the outer abutment surface, the quick-tight nut surrounds the entire second pipe.

[0005] Preferably, the quick-connect female connector is used to connect to the refrigerant charging valve. The refrigerant charging valve is provided with a quick-connect male connector that mates with the quick-connect female connector. The quick-connect male connector is inserted into the quick-connect female connector. The quick-connect male connector is provided with a limiting groove that mates with a steel ball. The steel ball is embedded in the limiting groove. The outer wall of the quick-connect male connector is in close contact with the first sealing ring.

[0006] Preferably, the refrigerant charging valve is a dual-gauge refrigerant charging valve or a single-gauge refrigerant charging valve.

[0007] Preferably, a pin is fixed inside the sealing gasket, and the pin does not block the sealing gasket.

[0008] Preferably, one end of the compression sleeve is provided with a positioning ring, which abuts against the end of the connecting hose.

[0009] Preferably, the outer wall of the main tube is provided with a limiting protrusion, which is closer to the connecting hose than the movable sleeve. The side wall of the movable sleeve is provided with a notch that allows the limiting protrusion to pass through, and the notch opens at the end of the movable sleeve near the connecting hose.

[0010] Preferably, when the notch is misaligned with the limiting protrusion, the movable sleeve moves to the point where it is pressed against the limiting protrusion, and the inner wall of the limiting ring still presses against the steel ball. When the notch is aligned with the limiting protrusion, the movable sleeve moves to the bottom of the notch and is pressed against the limiting protrusion, and the inner wall of the limiting ring does not press against the steel ball.

[0011] Preferably, the limiting protrusion is a rod inserted into the outer wall of the main tube.

[0012] Preferably, the outer wall of the fixing tube is provided with a plurality of first anti-detachment rings, and the inner wall portion of the main tube that contacts the outer wall of the connecting hose is provided with a plurality of second anti-detachment rings.

[0013] The beneficial effects of this utility model are as follows: By placing the quick-connect female connector at one end of the connecting hose and having it mate with the quick-connect male connector on the refrigerant charging valve, leakage is less likely to occur at the connection between the refrigerant charging hose and the refrigerant charging valve, and the refrigerant charging hose and the refrigerant charging valve can be quickly assembled and disassembled; when the opening groove and the limiting protrusion are misaligned, accidental separation between the refrigerant charging hose and the refrigerant charging valve can be effectively avoided, ensuring the reliability of the connection.

[0014] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0015] Figure 1 This is the front view of the leak-proof refrigerant charging pipe of this utility model.

[0016] In the diagram: 1-Connecting hose, 2-Quick-fit female connector, 3-Modible sleeve, 4-Connecting pipe, 5-Quick-tight nut, 6-Quick-fit male connector, 11-Fixing pipe, 12-Pressure sleeve, 13-Positioning ring, 20-Main body pipe, 21-Annular mounting groove, 22-First sealing ring, 23-Side hole, 24-Steel ball, 25-Annular embedding groove, 26-Snap ring, 27-Protruding ring, 28-Limiting protrusion, 30-Notch groove, 31-Limiting ring, 32-Spring, 41-First pipe body, 42-Second pipe body, 43-Sealing washer, 44-Pin, 50-Blocking ring, 60-Limiting groove. Detailed Implementation

[0017] Example 1: See Figure 1 The present invention relates to a leak-proof refrigerant charging pipe, comprising a quick-connect female connector 2, a connecting hose 1, a connecting pipe 4, a sealing gasket 43, and a quick-tightening nut 5. One end of the connecting hose 1 is connected to the quick-connect female connector 2, and the other end of the connecting hose 1 is connected to the connecting pipe 4.

[0018] The quick-connect female connector 2 consists of a main tube 20, a movable sleeve 3, and a spring 32. The inner wall of the main tube 20 has an annular mounting groove 21, within which a first sealing ring 22 is embedded. The side wall of the main tube 20 has several side holes 23 located on the same circumference. The annular mounting groove 21 is closer to the connecting hose 1 than the side holes 23. Each side hole 23 is equipped with a steel ball 24, which passes through the side hole 23. A limiting wall abutting the steel ball 24 is provided at the end of the side hole 23 near the inner wall of the main tube 20. A movable sleeve 3 is fitted over the main tube 20. A limiting ring 31 is provided on the inner wall of the movable sleeve 3, with its inner wall abutting the steel ball 24. The outer side of the main tube 20 has a... A spring 32, which is always in a compressed state, is sandwiched between the convex ring 27 and the limiting ring 31. The spring 32 is sleeved on the outside of the first connector. An annular embedding groove 25 is provided on the outer wall of the main body tube 20. The annular embedding groove 25, the limiting ring 31 and the convex ring 27 are arranged along the direction close to the connecting hose 1. A retaining ring 26 is embedded in the annular embedding groove 25. A part of the retaining ring 26 is located outside the annular embedding groove 25. The retaining ring 26 abuts against the limiting ring 31. The distance between the inner wall of the movable sleeve 3 and the outer wall of the area where the side hole 23 of the main body tube 20 is located is less than the outer diameter of the steel ball 24. The distance between the inner wall of the movable sleeve 3 and the inner wall of the area where the side hole 23 of the main body tube 20 is located is greater than the outer diameter of the steel ball 24.

[0019] One end of the connecting hose 1 is inserted into the body tube 20 of the quick-connect female connector 2. A fixing tube 11 is inserted into the end of the connecting hose 1 inserted into the body tube 20. The outer wall of the fixing tube 11 is in close contact with the inner wall of the connecting hose 1, and the outer wall of the connecting hose 1 is in close contact with the inner wall of the body tube 20.

[0020] The connecting pipe 4 consists of a first pipe body 41 and a second pipe body 42 connected together. A portion of the first pipe body 41 is inserted into the connecting hose 1. A compression sleeve 12 is fitted onto the end of the connecting hose 1 inserted into the first pipe body 41. The outer wall of the first pipe body 41 is in close contact with the inner wall of the connecting hose 1, and the outer wall of the connecting hose 1 is in close contact with the inner wall of the compression sleeve 12. The outer diameter of the second pipe body 42 is larger than the outer diameter of the first pipe body 41. An outer abutment surface is formed at the external connection of the first pipe body 41 and the inner diameter of the second pipe body 42 is larger than the inner diameter of the first pipe body 41. An inner abutment surface is formed at the internal connection of the first pipe body 41 and the second pipe body 42. A sealing gasket 43 is inserted into the second pipe body 42. One end of the sealing gasket 43 abuts against the inner abutment surface, and the other end of the sealing gasket 43 is located outside the second pipe body 42. The outer wall of the sealing gasket 43 is in close contact with the inner wall of the second pipe body 42.

[0021] One end of the quick-tight nut 5 is provided with a blocking ring 50. The blocking ring 50 is fitted outside the first tube body 41. The inner diameter of the blocking ring 50 is smaller than the outer diameter of the second tube body 42. The inner diameter of the quick-tight nut 5 is larger than the outer diameter of the second tube body 42. When the blocking ring 50 abuts against the outer contact surface, the quick-tight nut 5 surrounds the entire second tube body 42.

[0022] The quick-connect female connector 2 is used to connect to the refrigerant charging valve. The refrigerant charging valve is provided with a quick-connect male connector 6 that mates with the quick-connect female connector 2. The quick-connect male connector 6 is inserted into the quick-connect female connector 2. The quick-connect male connector 6 is provided with a limiting groove 60 that mates with the steel ball 24. The steel ball 24 is embedded in the limiting groove 60. The outer wall of the quick-connect male connector 6 is in close contact with the first sealing ring 22.

[0023] The refrigerant charging valve is either a dual-gauge valve or a single-gauge valve.

[0024] The sealing gasket 43 has a pin 44 fixed inside, and the pin 44 does not block the sealing gasket 43.

[0025] One end of the compression sleeve 12 is provided with a positioning ring 13, which abuts against the end of the connecting hose 1.

[0026] Example 2: To prevent accidental separation between the refrigerant charging pipe and the refrigerant charging valve and to ensure the reliability of the connection, a limiting protrusion 28 is provided on the outer wall of the main tube 20. The limiting protrusion 28 is closer to the connecting hose 1 than the movable sleeve 3. A notch 30 is provided on the side wall of the movable sleeve 3 to allow the limiting protrusion 28 to pass through. The notch 30 opens at the end of the movable sleeve 3 near the connecting hose 1.

[0027] When the notch 30 is misaligned with the limiting protrusion 28, the movable sleeve 3 moves to the point where it is pressed against by the limiting protrusion 28, and the inner wall of the limiting ring 31 still presses against the steel ball 24. When the notch 30 is aligned with the limiting protrusion 28, the movable sleeve 3 moves to the bottom of the notch 30 and is pressed against by the limiting protrusion 28, and the inner wall of the limiting ring 31 does not press against the steel ball 24.

[0028] Example 3: To facilitate the formation of a limiting protrusion 28 on the main tube 20, the limiting protrusion 28 is a rod inserted into the outer wall of the main tube 20.

[0029] Example 4: To prevent the connecting hose 1 from detaching from the quick-connect female 2, the outer wall of the fixing tube 11 is provided with several first anti-detachment rings, and the inner wall of the main tube 20, which is in contact with the outer wall of the connecting hose 1, is provided with several second anti-detachment rings.

[0030] The working process of this utility model: During operation, the movable sleeve 3 is rotated until the notch 30 aligns with the limiting protrusion 28. The movable sleeve 3 is then moved until the bottom of the notch 30 is held in place by the limiting protrusion 28. At this point, the inner wall of the limiting ring 31 does not press against the steel ball 24, and the quick-connect female 2 can be easily inserted into the quick-connect male 6 of the refrigerant charging valve. Then, the movable sleeve 3 is released, and it returns to its original position under the action of the spring 32. At this point, the quick-connect female 2 locks the quick-connect male 6, completing the connection between the refrigerant charging pipe and the refrigerant charging valve. Then, the quick-tight nut 5 is screwed onto the refrigerant charging connector of the air conditioner. When the quick-tight nut 5 is tightened, the ejector pin 44 can open the one-way valve inside the refrigerant charging connector, completing the connection of the refrigerant charging pipe.

[0031] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A leak-proof refrigerant charging pipe, characterized in that: The system includes a quick-connect female connector (2), a connecting hose (1), a connecting tube (4), a sealing washer (43), and a quick-tightening nut (5). One end of the connecting hose (1) is connected to the quick-connect female connector (2), and the other end of the connecting hose (1) is connected to the connecting tube (4). The quick-connect female connector (2) consists of a main tube (20), a movable sleeve (3), and a spring (32). The inner wall of the main tube (20) is provided with an annular mounting groove (21), in which a first sealing ring (22) is embedded. The side wall of the main tube (20) is provided with several side holes (23), which are located on the same circumference. The annular mounting groove (21) is closer to the connecting hose (1) than the side holes (23). Each side hole (23) is equipped with a steel ball (24). (24) A through side hole (23) is provided at the end of the side hole (23) near the inner wall of the main tube (20) to abut against the steel ball (24). A movable sleeve (3) is fitted on the outside of the main tube (20). A limiting ring (31) is provided on the inner wall of the movable sleeve (3). The inner wall of the limiting ring (31) abuts against the steel ball (24). A convex ring (27) is provided on the outside of the main tube (20). A spring (32) that is always in a compressed state is sandwiched between the convex ring (27) and the limiting ring (31). The spring (32) is fitted on the outside of the first connector. An annular embedding groove (25) is provided on the outer wall of the main tube (20). The annular embedding groove (25), the limiting ring (31) and the convex ring (27) are arranged along the connecting hose (1) near the connecting hose (1) The annular groove (25) is arranged in the direction of the ring, and a retaining ring (26) is embedded in the annular groove (25). A part of the retaining ring (26) is located outside the annular groove (25). The retaining ring (26) abuts against the limiting ring (31). The distance between the inner wall of the movable sleeve (3) and the outer wall of the area where the side hole (23) of the main tube (20) is located is less than the outer diameter of the steel ball (24). The distance between the inner wall of the movable sleeve (3) and the inner wall of the area where the side hole (23) of the main tube (20) is located is greater than the outer diameter of the steel ball (24). One end of the connecting hose (1) is inserted into the interior of the main tube (20) of the quick connector (2). A fixing tube (11) is inserted into the end of the connecting hose (1) inserted into the main tube (20). The outer wall of the fixing tube (11) is tightly pressed against the inner wall of the connecting hose (1). The outer wall of the connecting hose (1) is in close contact with the inner wall of the main tube (20). The connecting tube (4) is composed of a first tube body (41) and a second tube body (42) connected together. A portion of the first tube body (41) is inserted into the connecting hose (1). A compression sleeve (12) is fitted onto the end of the connecting hose (1) inserted into the first tube body (41). The outer wall of the first tube body (41) is in close contact with the inner wall of the connecting hose (1). The outer wall of the connecting hose (1) is in close contact with the inner wall of the compression sleeve (12). The outer diameter of the second tube body (42) is larger than the outer diameter of the first tube body (41). An outer abutment surface is formed at the external connection point of the first tube body (41) and the second tube body (42). The inner diameter of the second tube body (42) is larger than the inner diameter of the first tube body (41).The internal connection between the first tube (41) and the second tube (42) forms an inner abutment surface. A sealing gasket (43) is inserted inside the second tube (42). One end of the sealing gasket (43) abuts against the inner abutment surface, and the other end of the sealing gasket (43) is located outside the second tube (42). The outer wall of the sealing gasket (43) is in close contact with the inner wall of the second tube (42). One end of the quick-tight nut (5) is provided with a retaining ring (50). The retaining ring (50) is fitted outside the first tube (41). The inner diameter of the retaining ring (50) is smaller than the outer diameter of the second tube (42), and the inner diameter of the quick-tight nut (5) is larger than the outer diameter of the second tube (42). When the retaining ring (50) abuts against the outer abutment surface, the quick-tight nut (5) surrounds the entire second tube (42).

2. The leak-proof refrigerant charging pipe as described in claim 1, characterized in that: The quick-connect female connector (2) is used to connect to the refrigerant charging valve. The refrigerant charging valve is provided with a quick-connect male connector (6) that mates with the quick-connect female connector (2). The quick-connect male connector (6) is inserted into the quick-connect female connector (2). The quick-connect male connector (6) is provided with a limiting groove (60) that mates with the steel ball (24). The steel ball (24) is embedded in the limiting groove (60). The outer wall of the quick-connect male connector (6) is in close contact with the first sealing ring (22).

3. The leak-proof refrigerant charging pipe as described in claim 2, characterized in that: The refrigerant charging valve is either a dual-gauge valve or a single-gauge valve.

4. The leak-proof refrigerant charging pipe as described in claim 1, characterized in that: The sealing gasket (43) has a pin (44) fixed inside, and the pin (44) does not block the sealing gasket (43).

5. The leak-proof refrigerant charging pipe as described in claim 1, characterized in that: The compression sleeve (12) has a positioning ring (13) at one end, and the positioning ring (13) abuts against the end of the connecting hose (1).

6. The leak-proof refrigerant charging pipe as described in claim 1, characterized in that: The outer wall of the main tube (20) is provided with a limiting protrusion (28), which is closer to the connecting hose (1) than the movable sleeve (3). The side wall of the movable sleeve (3) is provided with a notch (30) that allows the limiting protrusion (28) to pass through. The notch (30) opens at the end of the movable sleeve (3) near the connecting hose (1).

7. The leak-proof refrigerant charging pipe as described in claim 6, characterized in that: When the notch (30) is misaligned with the limiting protrusion (28), the movable sleeve (3) moves to the point where it is pressed against by the limiting protrusion (28), and the inner wall of the limiting ring (31) still presses against the steel ball (24). When the notch (30) is aligned with the limiting protrusion (28), the movable sleeve (3) moves to the point where the bottom of the notch (30) is pressed against by the limiting protrusion (28), and the inner wall of the limiting ring (31) does not press against the steel ball (24).

8. The leak-proof refrigerant charging pipe as described in claim 6, characterized in that: The limiting protrusion (28) is a rod inserted into the outer wall of the main tube (20).

9. The leak-proof refrigerant charging pipe as described in claim 1, characterized in that: The outer wall of the fixed tube (11) is provided with a number of first anti-detachment rings, and the inner wall of the main tube (20) that is in contact with the outer wall of the connecting hose (1) is provided with a number of second anti-detachment rings.

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