Low-pressure refrigerant filling valve

Abstract

The low-pressure refrigerant filling valve comprises a first threaded groove, a first sealing ring, a second sealing ring, a detachable nut, a sleeving disc, a second threaded groove, a nut, a valve body and a shell, the first threaded groove is formed in the bottom of the surface of the shell, and the second threaded groove is formed in the top of the surface of the shell; the nut rotates on the surface of the second threaded groove through threads, and the sleeving disc sleeves the top of the center of the surface of the shell. The low-pressure refrigerant filling valve has the advantages of being convenient to replace and good in sealing effect, and solves the problems that an existing connecting structure of a filling valve and a pipeline is achieved through welding, flaring is conducted on the end portion of the pipeline, one end of the filling valve is inserted into the flaring for welding, a gap is generated when the filling valve is inserted into the flaring, and the sealing effect is poor. The welding difficulty is increased to a great extent, the welding defects such as sand holes and pseudo soldering are easy to generate, and meanwhile, the time spent on maintenance and replacement is long.

Description

Technical Field

[0001] The utility model relates to the technical field of charging valves, in particular to a low-pressure refrigerant charging valve. Background Art

[0002] Generally, a car air conditioner will normally lose about 10% of refrigerant every year. This is determined by the sealing method of the car air conditioner compressor. The lost refrigerant can be replenished by regularly monitoring the car air conditioner every year. The car air conditioner can be replenished with coolant through the filling valve, and the refrigeration system filling valve is a device used to add refrigerant to the refrigeration system. Its working principle is as follows: when the penetration needle valve on the filling valve is opened, the inside of the filling valve is connected to the pipeline of the refrigeration system. At this time, refrigerant can be added to the refrigeration system through the filling valve. When the penetration needle valve is closed, the inside of the filling valve is isolated from the pipeline of the refrigeration system, thereby avoiding the refrigerant from gushing out during filling.

[0003] The existing connection structure between the filling valve and the pipeline is achieved by welding. The end of the pipeline is expanded, and one end of the filling valve is inserted into the expanded opening for welding. A gap is generated when the filling valve is inserted into the expanded opening, which greatly increases the difficulty of welding and is prone to welding defects such as sand holes and cold welds. At the same time, it takes a long time to repair and replace. Therefore, there is an urgent need for a low-pressure refrigerant filling valve to overcome the above-mentioned defects. Summary of the invention

[0004] The utility model aims to provide a low-pressure refrigerant charging valve, which has the advantages of convenient replacement and good sealing effect, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a low-pressure refrigerant filling valve, comprising a first thread groove, a first sealing ring, a second sealing ring, a disassembly nut, a sleeve disk, a second thread groove, a nut, a valve body and a shell, wherein the first thread groove is opened at the bottom of the shell surface, the second thread groove is opened at the top of the shell surface, the nut is rotated on the surface of the second thread groove through a thread, and the sleeve disk is sleeved on the top at the center of the shell surface.

[0006] Furthermore, the disassembly nut is sleeved at the center of the outer shell surface, and the second sealing ring is arranged at the bottom of the disassembly nut.

[0007] Furthermore, the inner cavity of the second sealing ring is fixedly connected to the surface of the outer shell, and the first sealing ring is arranged at the bottom of the second sealing ring.

[0008] Furthermore, the interior of the first sealing ring is fixedly connected to the surface of the shell, and the valve body is fixedly installed in the inner cavity of the shell.

[0009] Furthermore, the diameter of the disassembly nut is greater than the diameter of the sleeve disc, and the diameter of the second sealing ring is greater than the diameter of the first sealing ring.

[0010] In summary, due to the adoption of the above technology, the beneficial effects of the utility model are:

[0011] The utility model mainly facilitates the connection and fixation of the overall device with the end of the pipeline by arranging the first thread groove, and at the same time facilitates the installation and disassembly of the overall device. When replacing, the staff fixes the connection with the surface of the disassembly nut through the movable wrench, and then rotates the movable wrench. Under the action of the movable wrench, the disassembly nut drives the overall device to rotate, so that the first thread groove is out of contact with the pipeline port, and then the shell is moved upward. At this time, the first sealing ring and the second sealing ring are separated from the pipeline interface, so that the shell is disassembled. When in use, the nut is rotated to open the nut. After opening, the refrigerant joint is clamped on the surface of the socket disk, and the refrigerant is input into the inner cavity of the pipeline under the action of the valve body. The utility model has the advantages of convenient replacement and good sealing effect, and solves the problem that the connection structure of the existing filling valve and the pipeline is realized by welding, the end of the pipeline is expanded, and one end of the filling valve is inserted into the expanded opening for welding. The filling valve is inserted into the expanded opening to produce a gap, which greatly increases the difficulty of welding, is prone to welding defects such as sand holes and cold welding, and takes a long time during maintenance and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the front structure of the utility model;

[0014] Figure 3 It is a schematic diagram of the cross section of the structure of the utility model;

[0015] Figure 4 It is a schematic diagram of the structure of the utility model from top view.

[0016] In the figure: 1, first thread groove; 2, first sealing ring; 3, second sealing ring; 4, disassembly nut; 5, socket plate; 6, second thread groove; 7, nut; 8, valve body; 9, housing. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0018] The utility model provides Figure 1-4 As shown, a low-pressure refrigerant charging valve comprises a first thread groove 1, a first sealing ring 2, a second sealing ring 3, a disassembly nut 4, a sleeve plate 5, a second thread groove 6, a nut 7, a valve body 8 and a shell 9, wherein the first thread groove 1 is provided at the bottom of the surface of the shell 9, the second thread groove 6 is provided at the top of the surface of the shell 9, the nut 7 is rotated on the surface of the second thread groove 6 by a thread, and the sleeve plate 5 is sleeved on the top of the center of the surface of the shell 9;

[0019] More specifically, by providing the first thread groove 1, it is mainly convenient to connect and fix the overall device with the end of the pipeline, and it is also convenient to install and disassemble the overall device. When replacing, the staff fixes the connection with the surface of the disassembly nut 4 through an adjustable wrench, and then rotates the adjustable wrench. Under the action of the adjustable wrench, the disassembly nut 4 drives the overall device to rotate, so that the first thread groove 1 is out of contact with the pipeline port, and then the shell 9 is moved upward. At this time, the first sealing ring 2 and the second sealing ring 3 are out of contact with the pipeline interface, so that the shell 9 is disassembled. When in use, the nut 7 is rotated to open the nut 7. After opening, the refrigerant connector is clamped on the surface of the socket disk 5, and the refrigerant is input into the inner cavity of the pipeline under the action of the valve body 8. It has the advantages of convenient replacement and good sealing effect.

[0020] In some embodiments, the disassembly nut 4 is sleeved at the center of the surface of the outer shell 9, and the second sealing ring 3 is arranged at the bottom of the disassembly nut 4. More specifically, by setting the disassembly nut 4, it is mainly convenient to drive the overall device to rotate, so that the overall device is fixed or out of contact with the pipeline interface.

[0021] In some embodiments, the inner cavity of the second sealing ring 3 is fixedly connected to the surface of the outer shell 9, and the first sealing ring 2 is arranged at the bottom of the second sealing ring 3. More specifically, the second sealing ring 3 is arranged to perform secondary sealing on the gap generated at the interface between the outer shell 9 and the pipeline.

[0022] In some embodiments, the interior of the first sealing ring 2 is fixedly connected to the surface of the outer shell 9, and the valve body 8 is fixedly installed in the inner cavity of the outer shell 9. More specifically, the first sealing ring 2 is provided to mainly seal the gap at the interface between the outer shell 9 and the pipeline to prevent side leakage.

[0023] In some embodiments, the diameter of the disassembly nut 4 is larger than the diameter of the socket disk 5, and the diameter of the second sealing ring 3 is larger than the diameter of the first sealing ring 2. More specifically, the nut 7 is provided to mainly seal the top of the outer shell 9, and the valve body 8 is provided to mainly facilitate the refrigerant to enter the inner cavity of the pipeline while preventing it from flowing back.

[0024] Working principle:

[0025] During use: when replacing it, the staff uses an adjustable wrench to fix the surface of the disassembly nut 4, and then rotates the adjustable wrench. Under the action of the adjustable wrench, the disassembly nut 4 drives the entire device to rotate, so that the first thread groove 1 is out of contact with the pipe port, and then the outer shell 9 is moved upward. At this time, the first sealing ring 2 and the second sealing ring 3 are out of contact with the pipe interface, so that the outer shell 9 is disassembled. When in use, the nut 7 is rotated to open the nut 7. After opening, the refrigerant joint is clamped on the surface of the socket disk 5, and the refrigerant is input into the inner cavity of the pipe under the action of the valve body 8. It has the advantages of convenient replacement and good sealing effect.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

Claims

1. A low-pressure refrigerant charging valve, characterized in that: The valve comprises a first thread groove (1), a first sealing ring (2), a second sealing ring (3), a disassembly nut (4), a sleeve plate (5), a second thread groove (6), a nut (7), a valve body (8) and a housing (9), wherein the first thread groove (1) is formed at the bottom of the surface of the housing (9), the second thread groove (6) is formed at the top of the surface of the housing (9), the nut (7) is screwed on the surface of the second thread groove (6) by means of a thread, and the sleeve plate (5) is sleeved on the top of the center of the surface of the housing (9).

2. The low-pressure refrigerant charging valve according to claim 1, characterized in that: The disassembly nut (4) is sleeved at the center of the surface of the outer shell (9), and the second sealing ring (3) is arranged at the bottom of the disassembly nut (4).

3. The low-pressure refrigerant charging valve according to claim 1, characterized in that: The inner cavity of the second sealing ring (3) is fixedly connected to the surface of the outer shell (9), and the first sealing ring (2) is arranged at the bottom of the second sealing ring (3).

4. The low-pressure refrigerant charging valve according to claim 1, characterized in that: The interior of the first sealing ring (2) is fixedly connected to the surface of the outer shell (9), and the valve body (8) is fixedly mounted in the inner cavity of the outer shell (9).

5. The low-pressure refrigerant charging valve according to claim 1, characterized in that: The diameter of the disassembly nut (4) is greater than the diameter of the sleeve disc (5), and the diameter of the second sealing ring (3) is greater than the diameter of the first sealing ring (2).

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