Condenser plug-in fill valve

Abstract

The utility model discloses condenser insertion type filling valve, including the pipe body, the outer wall of pipe body is provided with first boss and second boss, the inside of pipe body is provided with filling valve, and the outer wall of filling valve near top is provided with outer thread, and the inner wall of pipe body is provided with internal thread in the same position, and outer thread and internal thread are screwed together, and the both sides of filling valve inner wall are provided with plug block. The first boss and the second boss of the outer wall of the pipe body can accurately position the pipe body and the external pipeline during welding, the annular groove of the filling valve guides the directional filling of the welding material, the inner hole is not in contact with the welding material, the welding qualification rate is improved to be greater than or equal to 95%, the risk of welding material blockage and the cost of artificial repair are reduced, the outer thread surface is plated with 5-8 microns nickel layer, the internal thread is passivated, combined with the design of 0.02-0.05mm cooperation gap, the sealing property and the corrosion resistance of the threaded connection are improved, the manual welding operation is adapted, and the practicability and reliability of the product are further improved.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration and air conditioning technology, specifically to a condenser insertion type charging valve. Background Technology

[0002] The condenser charging valve is a key component used for charging refrigerant into the condenser piping. Current technologies often employ a close-fitting piping structure, where the condenser's heat dissipation piping is tightly bonded to the surface of the component to be cooled. Its core principle is to utilize an efficient heat conduction path, allowing the cooling medium in the piping to quickly remove heat from the contact area. This structure typically uses metal piping, secured to the target surface through welding, extrusion, or thermally conductive adhesive to minimize thermal resistance.

[0003] However, this structure has significant drawbacks in practical applications: during the welding process, solder is easily drawn into the inner hole of the filling valve due to capillary action or improper temperature control, leading to blockage and failure; moreover, the welding pass rate is only about 20%, requiring a large amount of manual rework and resulting in high production costs; at the same time, trace amounts of solder seeping into the inner hole are difficult to detect visually, posing potential quality hazards. Therefore, there is an urgent need to design a condenser insertion filling valve to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a condenser insertion-type filling valve to address the aforementioned shortcomings in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A condenser insertion-type filling valve includes a tube body. The outer wall of the tube body is provided with a first boss and a second boss. The filling valve is provided inside the tube body. The outer wall of the filling valve near the top is provided with an external thread. The inner wall of the tube body is provided with an internal thread at the same position. The external thread and the internal thread are threaded together. Pin blocks are provided on both sides of the inner wall of the filling valve.

[0007] Preferably, the first boss and the second boss are spaced apart along the axial direction of the pipe body, and the outer diameter of both is larger than the outer diameter of the pipe body, which is used to position the relative position of the pipe body and the external pipeline during welding.

[0008] Preferably, the filling valve is provided with an annular bevel structure to guide the solder to fill in a specific direction and prevent the solder from seeping into the inner hole of the filling valve.

[0009] Preferably, the pin block is a rectangular block structure, symmetrically arranged along the inner wall of the filling valve, and a circular hole is opened on one side of the pin block.

[0010] Preferably, the external thread surface is plated with a nickel layer with a thickness of 5-8 μm, and the internal thread is passivated.

[0011] Preferably, the clearance between the external thread and the internal thread is 0.02-0.05 mm.

[0012] In the above technical solution, the condenser insertion type charging valve provided by this utility model has the following advantages:

[0013] (1) The first and second protrusions on the outer wall of the pipe can accurately position the pipe body and the external pipeline during welding. The annular bevel of the filling valve guides the solder to fill in the direction, so that the inner hole and the solder do not come into contact, which increases the welding qualification rate to ≥95%, reduces the risk of solder blockage and the cost of manual rework.

[0014] (2) The external thread is plated with a 5-8μm nickel layer and the internal thread is passivated. Combined with a 0.02-0.05mm fit clearance design, the sealing performance and corrosion resistance of the threaded connection are improved. It is suitable for manual welding operations and further enhances the practicality and reliability of the product. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 This is a structural front view of an embodiment of the condenser insertion-type filling valve of this utility model.

[0017] Figure 2 This is a structural cross-sectional view of an embodiment of the condenser insertion-type filling valve of this utility model.

[0018] Figure 3 This is a top view of the structure of an embodiment of the condenser insertion-type filling valve of this utility model.

[0019] Figure 4 A partial sectional view of the internal thread structure provided for an embodiment of the condenser insertion-type filling valve of this utility model.

[0020] 1. Pipe body; 2. First boss; 3. Second boss; 5. Filling valve; 6. External thread; 7. Internal thread; 8. Pin block. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0022] like Figure 1-4As shown, the condenser insertion type filling valve provided in this embodiment of the utility model includes a pipe body 1. The outer wall of the pipe body 1 is provided with a first boss 2 and a second boss 3. The filling valve 5 is provided inside the pipe body 1. The outer wall of the filling valve 5 near the top is provided with an external thread 6. The inner wall of the pipe body 1 is provided with an internal thread 7 at the same position. The external thread 6 and the internal thread 7 are threaded together. The filling valve 5 is provided with a pin block 8 on both sides of the inner wall.

[0023] In this embodiment, a pipe body 1 is included, which is a cylindrical metal pipe made of stainless steel. Both the inner and outer walls are polished, and the surface roughness reaches Ra0.8μm to ensure smooth fluid flow.

[0024] The outer wall of the pipe body 1 is provided with a first boss 2 and a second boss 3. The first boss 2 and the second boss 3 are spaced 50mm apart along the axial direction of the pipe body 1. Both are annular structures and are integrally formed with the pipe body 1 by forging. The first boss 2 is located 20mm below the top of the pipe body 1, and the second boss 3 is located below the first boss 2. The outer diameter of the second boss 3 is larger than that of the first boss 2, forming a distinct stepped structure.

[0025] The inside of the pipe body 1 is equipped with a filling valve 5. The filling valve 5 has a cylindrical stepped valve body structure. The outer wall of the filling valve 5 near the top is provided with an external thread 6. The inner wall of the pipe body 1 is provided with an internal thread 7 at the same position. The external thread 6 and the internal thread 7 are threaded together. The length of the external thread 6 is 25mm. It adopts the M42×2 fine thread standard, with a pitch of 2mm and a thread angle of 60°. Correspondingly, the inner wall of the pipe body 1 is provided with an internal thread 7 at the same height position. The thread specification is completely matched with the external thread 6.

[0026] Both sides of the inner wall of the filling valve 5 are provided with pin blocks 8. The pin blocks 8 are rectangular in structure. One side is fixedly connected to the inside of the filling valve 5, and the other side has a hole. The inner liner clamp can be used to insert both ends into the pin blocks 8 to avoid direct contact of the fingers with the filling valve 5. The filling valve 5 is screwed into the inner wall of the pipe body 1 through the inner liner clamp until the top of the filling valve is flush with the top of the pipe body 1. Then the inner liner clamp is removed.

[0027] Specifically, the first boss 2 and the second boss 3 are spaced apart along the axial direction of the pipe body 1, and the outer diameter of both is larger than the outer diameter of the pipe body 1, which is used to position the relative position of the pipe body 1 and the external pipeline during welding.

[0028] Furthermore, the filling valve 5 is equipped with an annular bevel structure to guide the directional filling of solder and prevent solder from seeping into the inner hole of the filling valve. This bevel structure plays a crucial role in the welding process: when argon arc welding is used to weld the connection between the filling valve 5 and the pipe body 1, the bevel can guide the directional flow of solder, allowing the solder to fill the gap between the filling valve 5 and the pipe body 1 evenly, forming a continuous and dense weld. At the same time, the bevel design can also effectively prevent solder from seeping into the inner hole of the filling valve 5, avoiding the impact on the normal operation of the filling valve 5 due to solder clogging the inner hole.

[0029] Furthermore, the pin block 8 is a rectangular block structure, symmetrically arranged along the inner wall of the filling valve 5, and a circular hole is opened on one side of the pin block 8.

[0030] It should be noted that the external thread 6 is plated with a nickel layer with a thickness of 5-8μm, and the internal thread 7 is passivated. The nickel layer plated with a thickness of 5-8μm on the surface of the external thread 6 has good corrosion resistance and self-lubricating properties, which can effectively prevent the thread pair from seizing during frequent disassembly and assembly. The internal thread 7 is passivated to form a dense oxide film, which improves the corrosion resistance of the thread.

[0031] It should be noted that the clearance between the external thread 6 and the internal thread 7 is 0.02-0.05mm. This precise fit ensures both the reliability of the threaded connection and prevents thread damage to the filling valve 5 during installation due to interference fit. During installation, the filling valve 5 is rotated using a special tool, allowing it to slowly screw into the internal thread 7 along the inner wall of the pipe body 1 until the shoulder of the filling valve 5 is tightly fitted against the stepped surface of the inner wall of the pipe body 1, achieving axial positioning.

[0032] Work steps: 1. Use ultrasonic cleaning equipment to clean the pipe body 1, filling valve 5, first boss 2, second boss 3 and other parts to remove surface oil, metal shavings and other impurities.

[0033] 2. After cleaning, avoid direct contact between your fingers and the surface of the parts. You can wear clean gloves to prevent grease contamination from affecting the welding effect.

[0034] 3. Using the inner liner clamp, insert both ends into the pin block 8 to avoid direct contact of the filling valve 5 with your fingers. Use the inner liner clamp to screw the filling valve 5 along the inner wall of the pipe body 1 until the top of the filling valve 5 is flush with the top of the pipe body 1. Then remove the inner liner clamp.

[0035] 4. Align the pipe body 1 with the external pipeline, and use the outer diameter of the first boss 2 and the second boss 3 to position the relative position of the pipe body 1 and the pipeline to ensure their axial coaxiality.

[0036] 5. Use pipe wrenches to clamp the connection between pipe body 1 and the pipeline to ensure stable position during welding and avoid displacement;

[0037] 6. Check the depth of the annular bevel at the top of the filling valve 5 to ensure that no impurities remain.

[0038] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A condenser insertion-type charging valve, comprising a pipe body (1), characterized in that, The outer wall of the pipe body (1) is provided with a first boss (2) and a second boss (3). The inside of the pipe body (1) is provided with a filling valve (5). The outer wall of the filling valve (5) near the top is provided with an external thread (6). The inner wall of the pipe body (1) is provided with an internal thread (7) at the same position. The external thread (6) and the internal thread (7) are threaded together. The inner wall of the filling valve (5) is provided with a pin block (8) on both sides.

2. The condenser insertion-type charging valve according to claim 1, characterized in that, The first boss (2) and the second boss (3) are spaced apart along the axial direction of the pipe body (1), and the outer diameter of both is greater than the outer diameter of the pipe body (1), which is used to position the relative position of the pipe body and the external pipeline during welding.

3. The condenser insertion-type charging valve according to claim 1, characterized in that, The filling valve (5) is provided with an annular bevel structure to guide the solder to fill in a specific direction and prevent the solder from seeping into the inner hole of the filling valve.

4. The condenser insertion-type charging valve according to claim 1, characterized in that, The pin block (8) is a rectangular block structure, symmetrically arranged along the inner wall of the filling valve (5), and a circular hole is opened on one side of the pin block (8).

5. The condenser insertion-type charging valve according to claim 1, characterized in that, The external thread (6) is plated with a nickel layer with a thickness of 5-8 μm, and the internal thread (7) is passivated.

6. The condenser insertion type charging valve according to claim 1, characterized in that, The clearance between the external thread (6) and the internal thread (7) is 0.02-0.05 mm.

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