Copper pipe welding tool for four-way valve of air source heat pump
By designing a positioning seat, clamping mechanism, and copper pipe welding fixture for cooling water circulation, the problems of poor heat dissipation and lack of copper pipe constraint in the welding of the four-way valve to the copper pipe in the air source heat pump system were solved, thereby improving the welding quality and system performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUAINAN JIALI NEW ENERGY TECHNOLOGY CO LTD
- Filing Date
- 2025-07-17
- Publication Date
- 2026-04-28
AI Technical Summary
In air source heat pump systems, the welding of the four-way valve to the copper pipe has problems such as poor heat dissipation and lack of copper pipe constraint, resulting in poor welding quality and affecting sealing performance, reliability and energy efficiency.
A copper pipe welding fixture including a positioning seat, a clamping mechanism, and a constraint mechanism was designed. The four-way valve body is initially positioned using an arc groove and a rubber gasket. The copper pipe is fixed by clamping screws and clamping plates. Combined with a cooling water circulation system, the welding heat is removed, ensuring stable positioning and heat dissipation of the four-way valve body and the copper pipe.
This improves welding quality, prevents the four-way valve from deforming due to high temperatures, extends its service life, ensures the strength and sealing of the welded position, and enhances system performance.
Smart Images
Figure CN224169140U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of welding fixture technology, specifically a copper pipe welding fixture for an air source heat pump four-way valve. Background Technology
[0002] In air source heat pump systems, the four-way valve is a key component for switching between cooling and heating modes, and the welding quality between the four-way valve and the copper pipe directly affects the system's sealing performance, reliability, and energy efficiency. Currently, the welding process between the four-way valve and the copper pipe in air source heat pumps commonly suffers from problems such as poor heat dissipation and insufficient copper pipe constraint.
[0003] On the one hand, traditional welding fixtures struggle to quickly dissipate the high heat generated during welding, causing the four-way valve body to overheat due to prolonged exposure to high temperatures. This leads to a decline in the performance of the valve body material, aging of seals, and even deformation, severely impacting the valve's service life and operational performance. On the other hand, existing fixtures lack effective positioning and constraint structures for the copper pipes, making them prone to displacement during welding. This results in welding position deviations, insufficient strength, and poor sealing of the weld joints. This not only increases the risk of refrigerant leakage but may also cause system instability and reduce the overall performance of the air source heat pump.
[0004] In view of the above, this application is hereby submitted. Utility Model Content
[0005] The purpose of this invention is to provide a copper pipe welding fixture for an air source heat pump four-way valve to solve the problems mentioned in the background art.
[0006] To solve the above-mentioned technical problems, this utility model provides a copper pipe welding fixture for an air source heat pump four-way valve, including a base and a four-way valve body fixed on the base. A bracket is installed on the top surface of the base, and a bearing box is installed on the top surface of the bracket. The bearing box is filled with water and a positioning seat is provided inside the bearing box. The four-way valve body is placed on the positioning seat. A clamping mechanism for clamping and fixing the four-way valve body on the positioning seat is provided on the base. A constraint mechanism for fixing the copper pipe is also provided on the top of the base. The constraint mechanism includes a first screw rotatably connected to the top surface of the base. A first adjusting seat is threadedly connected to the first screw. A second screw is threadedly connected to the first adjusting seat. The second screw and the first screw are set at a 90-degree angle. A U-shaped fixing clamp is installed at the end of the second screw. An adjusting bolt is threadedly connected to the top surface of the fixing clamp. A clamping head is connected to one end of the adjusting bolt extending to the inner side of the fixing clamp.
[0007] Furthermore, the clamping mechanism includes two support rods perpendicular to the top surface of the base. The two support rods are symmetrically arranged on the left and right sides of the bearing box. A support is installed at the top of the support rod, and a clamping screw is threaded onto the support. The clamping screw is parallel to the top surface of the base. A clamping plate is rotatably connected to the opposite end of each of the two clamping screws. The clamping plate is slidably connected inside the bearing box.
[0008] Furthermore, multiple positioning seats are provided, and each positioning seat is provided with an arc-shaped groove that matches the shape of the four-way valve body. A gasket is installed inside the arc-shaped groove, and the gasket is made of rubber.
[0009] Furthermore, multiple constraint mechanisms are provided, which are distributed at intervals on the top surface of the base, and each constraint mechanism corresponds to a welding port position of the four-way valve body.
[0010] Furthermore, a hinge seat is connected to the end of the second screw, and the fixed clamp is connected to the second screw through the hinge seat.
[0011] Furthermore, the interior of the carrier box is provided with a surrounding plate, which surrounds the exterior of the four-way valve body. The surrounding plate divides the interior of the carrier box into two independent water chambers, namely a first water chamber and a second water chamber. The four-way valve body is located inside the first water chamber. A drain outlet connecting the first and second water chambers is opened on the upper part of the side wall at one end of the surrounding plate, and a water inlet connecting the first and second water chambers is opened on the lower part of the side wall at the other end of the surrounding plate.
[0012] Furthermore, the top of the base is provided with a sliding groove, and a slide rail is slidably installed inside the sliding groove. A limit baffle is slidably installed on the slide rail. The limit baffle is perpendicular to the welding port of the four-way valve. The side wall of the slide rail is provided with scale markings. A locking bolt is also threaded onto the limit baffle. The locking bolt is tightened to fix the limit baffle at a designated position on the slide rail.
[0013] Furthermore, a positioning bolt is threaded onto the side wall at the bottom end of the slide rail, and the positioning bolt is tightened to fix the slide rail at a designated position on the top surface of the base.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] 1. This utility model achieves the initial positioning of the four-way valve body through the arc-shaped groove of the positioning seat and the rubber liner. With the clamping mechanism composed of clamping screws and clamping plates on both sides, it can firmly fix the four-way valve body of different specifications. The adjusting bolts and pressing heads in the constraint mechanism can fit the surface of copper pipes of different diameters. Combined with the limit baffle and scale markings, the insertion depth of the copper pipe is precisely limited, realizing the all-round positioning and constraint of the four-way valve body and copper pipe, avoiding problems such as insufficient joint strength and poor sealing caused by displacement during welding.
[0016] 2. In this utility model, the enclosure inside the bearing box divides the space into a first water chamber and a second water chamber. It utilizes the principle that hot water with a lower density flows out from the drain and cold water flows in from the inlet during welding to form an automatic circulating cooling water, which continuously removes the welding heat and prevents the four-way valve body from experiencing material performance degradation, aging or deformation of seals due to high temperature. This effectively protects the internal structure of the valve body and extends its service life. Attached Figure Description
[0017] Figure 1 This is a front view structural diagram of the present invention;
[0018] Figure 2 This is a schematic diagram of the rear view structure of this utility model;
[0019] Figure 3 This is a schematic diagram of the positioning seat in this utility model;
[0020] Figure 4 for Figure 3 Enlarged view of the structure at point A in the middle.
[0021] In the diagram: 1. Base; 2. Bracket; 3. Carrier box; 4. Positioning seat; 5. Gasket; 6. Four-way valve body; 7. Enclosure; 8. First water chamber; 9. Second water chamber; 10. Drain outlet; 11. Inlet; 12. First screw; 13. First adjusting seat; 14. Second screw; 15. Hinge seat; 16. Fixed clamp; 17. Adjusting bolt; 18. Pressing head; 19. Slide rail; 20. Limiting baffle; 21. Scale mark; 22. Slide groove; 23. Positioning bolt; 24. Support rod; 25. Support; 26. Clamping screw; 27. Clamping plate; 28. Locking bolt. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] Please see Figures 1-4 This utility model provides a technical solution: a copper pipe welding fixture for an air source heat pump four-way valve, including a base 1 and a four-way valve body 6 fixed on the base 1. A bracket 2 is installed on the top surface of the base 1, and a bearing box 3 is installed on the top surface of the bracket 2. The bearing box 3 is filled with water, and a positioning seat 4 is provided inside the bearing box 3. The four-way valve body 6 is placed on the positioning seat 4. A clamping mechanism for clamping and fixing the four-way valve body 6 on the positioning seat 4 is provided on the base 1. The top of the base 1 is also provided with a fixing mechanism. The copper tube restraint mechanism includes a first screw 12 rotatably connected to the top surface of the base 1, a first adjusting seat 13 threadedly connected to the first screw 12, a second screw 14 threadedly connected to the first adjusting seat 13, the second screw 14 and the first screw 12 being set at a 90-degree angle, a U-shaped fixed clamp 16 being installed at the end of the second screw 14, an adjusting bolt 17 threadedly connected to the top surface of the fixed clamp 16, and a clamping head 18 being connected to one end of the adjusting bolt 17 extending to the inner side of the fixed clamp 16.
[0024] Specifically, base 1 serves as the basic carrier, supporting the entire tooling. Bracket 2 supports the carrier box 3, which is filled with water and fitted with a positioning seat 4 to hold the four-way valve body 6. A clamping mechanism secures the four-way valve body 6 to the positioning seat 4. In the constraint mechanism, rotating the first screw 12 moves the first adjusting seat 13 axially, rotating the second screw 14 moves the fixed clamp 16, and rotating the adjusting bolt 17 moves the clamping head 18 up and down, thus fixing the copper pipe. Through the coordinated action of base 1, bracket 2, carrier box 3, positioning seat 4, clamping mechanism, and constraint mechanism, the installation and fixation of the four-way valve body 6 and the copper pipe are achieved, providing a stable foundation for welding work, improving welding quality, and solving the problem of insufficient copper pipe constraint in the prior art.
[0025] As a technical optimization of this utility model, the clamping mechanism includes a support rod 24 perpendicular to the top surface of the base 1. There are two support rods 24, which are symmetrically arranged on the left and right sides of the bearing box 3. A support 25 is installed at the top of the support rod 24. A clamping screw 26 is threadedly connected to the support 25. The clamping screw 26 is parallel to the top surface of the base 1. A clamping plate 27 is rotatably connected to the opposite end of the two clamping screws 26. The clamping plate 27 is slidably connected inside the bearing box 3.
[0026] Specifically, two support rods 24 are perpendicular to the top surface of the base 1 and symmetrically arranged on both sides of the bearing box 3. The support 25 is installed on the top of the support rods 24. The clamping screw 26 is threadedly connected to the support 25. When the clamping screw 26 is rotated, due to the threaded transmission, the clamping screw 26 will drive the clamping plate 27 to move closer to or further away from the positioning seat 4 inside the bearing box 3, thereby clamping or releasing the four-way valve body 6. This clamping mechanism design can be adjusted according to the specifications of the four-way valve body 6 to achieve a firm clamping of four-way valve bodies 6 of different sizes, ensuring that the four-way valve body 6 will not be displaced during the welding process, and improving the accuracy and stability of the welding.
[0027] As a technical optimization of this utility model, multiple positioning seats 4 are provided. The positioning seats 4 are provided with arc-shaped grooves that are adapted to the shape of the four-way valve body 6. A gasket 5 is installed inside the arc-shaped groove. The gasket 5 is made of rubber.
[0028] Specifically, the arc-shaped groove on the positioning seat 4 is adapted to the shape of the four-way valve body 6. Initial positioning is achieved by placing the four-way valve body 6 into the arc-shaped groove. The rubber gasket 5 is elastic, filling gaps and increasing friction, while also acting as a buffer. The design of the arc-shaped groove and gasket 5 effectively improves the positioning accuracy of the four-way valve body 6, preventing it from sliding and avoiding damage to the surface of the four-way valve body 6, thus protecting it and helping to ensure its performance and service life.
[0029] As a technical optimization of this utility model, multiple constraint mechanisms are provided, which are distributed at intervals on the top surface of the base 1, and the multiple constraint mechanisms correspond to the welding port positions of the four-way valve body 6.
[0030] Specifically, multiple constraint mechanisms are spaced apart on the top surface of the base 1, corresponding to the welding port positions of the four-way valve body 6. Each constraint mechanism can fix the copper pipe of the corresponding port by adjusting the bolt 17 to drive the clamping head 18. The copper pipes of multiple ports of the four-way valve body 6 can be fixed at the same time, ensuring that each copper pipe can be accurately constrained, improving the applicability of the welding fixture and the welding efficiency, and ensuring the quality of each welding point.
[0031] As a technical optimization of this utility model, the end of the second screw 14 is connected to a hinge seat 15, and the fixed clamp 16 is connected to the second screw 14 through the hinge seat 15.
[0032] Specifically, the end of the second screw 14 is connected to the fixed clamp 16 via the hinge seat 15, allowing the fixed clamp 16 to rotate relative to the second screw 14. This makes it more flexible to adjust the position and angle of the fixed clamp 16, increasing its flexibility and making it easier to adapt to the copper tube fixing requirements at different angles and positions. It can better constrain the copper tube in the circumference, improving the versatility of the tooling and its adaptability to different working conditions.
[0033] As a technical optimization of this utility model, the interior of the carrier box 3 is provided with a surrounding plate 7, which surrounds the exterior of the four-way valve body 6. The surrounding plate 7 divides the interior of the carrier box 3 into two independent first water chambers 8 and second water chambers 9. The four-way valve body 6 is located inside the first water chamber 8. A drain outlet 10 connecting the first water chamber 8 and the second water chamber 9 is opened on the upper part of the side wall at one end of the surrounding plate 7, and a water inlet 11 connecting the first water chamber 8 and the second water chamber 9 is opened on the lower part of the side wall at the other end of the surrounding plate 7.
[0034] Specifically, the enclosure 7 divides the interior of the bearing box 3 into a first water chamber 8 and a second water chamber 9, with the four-way valve body 6 located in the first water chamber 8. During welding, the water in the first water chamber 8 is heated, and the density of the hot water decreases, flowing into the second water chamber 9 from the drain outlet 10. Cold water flows into the first water chamber 8 from the inlet 11, forming an automatic circulation of cooling water. This automatic circulation of cooling water, achieved by utilizing the density change of water and gravity, can promptly remove the heat generated during welding, preventing the four-way valve body 6 from being damaged due to high temperatures. This solves the problem of poor heat dissipation in the prior art and helps to ensure the performance and service life of the four-way valve body 6.
[0035] As a technical optimization of this utility model, a sliding groove 22 is provided on the top of the base 1, and a slide rail 19 is slidably installed inside the sliding groove 22. A limit baffle 20 is slidably installed on the slide rail 19. The limit baffle 20 is perpendicular to the welding port of the four-way valve. A scale mark 21 is provided on the side wall of the slide rail 19. A locking bolt 28 is also threadedly connected to the limit baffle 20. The locking bolt 28 is tightened to fix the limit baffle 20 at a designated position on the slide rail 19.
[0036] Specifically, the limiting baffle 20 is connected to the slide rail 19 via a dovetail-shaped sliding block and can slide along the slide rail 19. The scale markings 21 on the slide rail 19 can help the operator determine the position of the limiting baffle 20. After adjusting the position, tightening the locking bolt 28 can fix the limiting baffle 20 on the slide rail 19. The operator can accurately adjust the position of the limiting baffle 20 according to the copper tube length requirements through the slide rail 19 and the scale markings 21, thereby effectively limiting the insertion depth of the copper tube, achieving accurate positioning of the copper tube in the depth direction, further improving the welding quality, and avoiding welding problems caused by improper insertion depth of the copper tube.
[0037] As a technical optimization of this utility model, a positioning bolt 23 is threadedly connected to the side wall at the bottom end of the slide rail 19. The positioning bolt 23 is tightened to fix the slide rail 19 at a designated position on the top surface of the base 1.
[0038] Specifically, the positioning bolts 23 on the bottom side wall of the slide rail 19 can fix the slide rail 19 to a designated position on the top surface of the base 1. When it is necessary to adjust the overall position of the limit baffle 20 or to adapt to different specifications of the four-way valve body 6 and copper pipe, the positioning bolts 23 can be loosened, the slide rail 19 can be moved to a suitable position and then tightened to fix it, so that the installation position of the slide rail 19 can be adjusted, which enhances the flexibility and adaptability of the tooling, can better meet different welding requirements, and improves the versatility and applicability of the tooling.
[0039] Working principle: The copper pipe welding fixture of this air source heat pump four-way valve is based on the base 1. The various functional structures complete the welding work through ingenious design and coordinated operation.
[0040] Regarding the fixing of the four-way valve body 6, the positioning seat 4 is set on the base 1. It adopts an arc-shaped groove design that matches the shape of the four-way valve body 6. A rubber pad 5 is provided in the arc-shaped groove. When the four-way valve body 6 is placed in the arc-shaped groove of the positioning seat 4, the shape of the arc-shaped groove matches the shape of the four-way valve, achieving initial positioning. The pad 5 is elastic. On the one hand, it can fill the small gap between the four-way valve body 6 and the arc-shaped groove, increase the friction, and prevent the four-way valve body 6 from sliding. On the other hand, it can play a buffering role to avoid damage to the surface of the four-way valve body 6 during placement. Clamping mechanisms are set on both sides of the positioning seat 4. The clamping mechanism includes a clamping plate 27 connected to the base 1 through a clamping screw 26. When the clamping screw 26 is rotated, due to the threaded transmission between the clamping screw 26 and the base 1, the rotation of the clamping screw 26 is converted into linear motion along the axial direction, which in turn drives the clamping plate 27 to move closer to or away from the positioning seat 4. In this way, four-way valve bodies 6 of different specifications can be firmly clamped to ensure that the four-way valve body 6 is stable and without displacement during the welding process.
[0041] The heat dissipation function is achieved by the support box 3 on the base 1. Inside the support box is a surrounding plate 7 that encircles the four-way valve body 6. One end has a water inlet 11, and the other end has a drain outlet 10. The water inlet 11 is positioned lower than the drain outlet 10. During welding, when the heat generated by welding raises the temperature of the water near the four-way valve body 6, the hot water, being less dense, flows upward and exits from the higher drain outlet 10. Meanwhile, the cold water, being relatively denser, flows in from the lower water inlet 11 under gravity, replenishing the space left by the hot water and creating an automatic circulation of cooling water. In this way, the continuously circulating cooling water can continuously remove the heat generated by welding, preventing damage to the internal structure or performance degradation of the four-way valve body 6 due to high temperatures.
[0042] The copper pipe constraint mechanism consists of a first screw 12, a first adjusting seat 13, a second screw 14, a hinge seat 15, a fixed clamp 16, an adjusting bolt 17, and a clamping head 18. When it is necessary to fix the copper pipe, the copper pipe is inserted into the corresponding port of the four-way valve body 6. By rotating the adjusting bolt 17, the clamping head 18 is driven to tightly fit the surface of copper pipes of different diameters. This not only achieves a firm constraint on the circumference of the copper pipe, but also provides a limiting baffle 20 on the base 1, which is perpendicular to the welding port of the four-way valve body 6. The limiting baffle 20 is connected to the slide rail 19 through a dovetail-shaped sliding block. The slide rail 19 is marked with scale marks 21. According to the length requirements of the copper pipe, the operator can slide the limiting baffle 20 along the dovetail groove on the slide rail 19 to adjust the position. When the copper tube is inserted into port 6 of the four-way valve body, the limit baffle 20 is pushed to the end of the copper tube. The scale mark 21 can help to accurately determine the position of the limit baffle 20, thereby effectively limiting the insertion depth of the copper tube, completing the positioning of the copper tube in the depth direction, and realizing the all-round accurate positioning of the copper tube.
[0043] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A copper pipe welding fixture for an air source heat pump four-way valve, comprising a base (1) and a four-way valve body (6) fixed on the base (1), characterized in that: A bracket (2) is mounted on the top surface of the base (1), and a bearing box (3) is mounted on the top surface of the bracket (2). The bearing box (3) is filled with water, and a positioning seat (4) is provided inside the bearing box (3). The four-way valve body (6) is placed on the positioning seat (4). A clamping mechanism for clamping and fixing the four-way valve body (6) on the positioning seat (4) is provided on the base (1). A constraint mechanism for fixing the copper pipe is also provided on the top of the base (1). The constraint mechanism includes a component rotatably connected to the top surface of the base (1). A first screw (12) is threadedly connected to a first adjusting seat (13), and a second screw (14) is threadedly connected to the first adjusting seat (13). The second screw (14) and the first screw (12) are set at a 90-degree angle. A U-shaped fixed clamp (16) is installed at the end of the second screw (14). An adjusting bolt (17) is threadedly connected to the top surface of the fixed clamp (16), and a clamping head (18) is connected to one end of the adjusting bolt (17) extending to the inside of the fixed clamp (16).
2. The copper pipe welding fixture for an air source heat pump four-way valve as described in claim 1, characterized in that: The clamping mechanism includes a support rod (24) perpendicular to the top surface of the base (1). There are two support rods (24), which are symmetrically arranged on the left and right sides of the bearing box (3). A support (25) is installed at the top of the support rod (24). A clamping screw (26) is threaded onto the support (25). The clamping screw (26) is parallel to the top surface of the base (1). A clamping plate (27) is rotatably connected to the opposite end of the two clamping screws (26). The clamping plate (27) is slidably connected inside the bearing box (3).
3. The copper pipe welding fixture for an air source heat pump four-way valve as described in claim 1, characterized in that: The positioning seat (4) is provided in multiple ways. The positioning seat (4) is provided with an arc-shaped groove that is adapted to the shape of the four-way valve body (6). A gasket (5) is installed inside the arc-shaped groove. The gasket (5) is made of rubber.
4. The copper pipe welding fixture for an air source heat pump four-way valve as described in claim 1, characterized in that: The constraint mechanism is provided in multiple ways, and the multiple constraint mechanisms are distributed at intervals on the top surface of the base (1), and the multiple constraint mechanisms correspond to the welding port positions of the four-way valve body (6).
5. The copper pipe welding fixture for an air source heat pump four-way valve as described in claim 1, characterized in that: The end of the second screw (14) is connected to a hinge seat (15), and the fixed clamp (16) is connected to the second screw (14) through the hinge seat (15).
6. The copper pipe welding fixture for an air source heat pump four-way valve as described in claim 1, characterized in that: The interior of the carrier box (3) is provided with a surrounding plate (7), which surrounds the outside of the four-way valve body (6). The surrounding plate (7) divides the interior of the carrier box (3) into two independent first water chambers (8) and second water chambers (9). The four-way valve body (6) is located inside the first water chamber (8). A drain outlet (10) connecting the first water chamber (8) and the second water chamber (9) is opened on the upper part of the side wall at one end of the surrounding plate (7), and a water inlet (11) connecting the first water chamber (8) and the second water chamber (9) is opened on the lower part of the side wall at the other end of the surrounding plate (7).
7. The copper pipe welding fixture for an air source heat pump four-way valve as described in claim 1, characterized in that: The top of the base (1) is provided with a slide groove (22), and a slide rail (19) is slidably installed inside the slide groove (22). A limit baffle (20) is slidably installed on the slide rail (19). The limit baffle (20) is perpendicular to the welding port of the four-way valve. A scale mark (21) is provided on the side wall of the slide rail (19). A locking bolt (28) is also threaded onto the limit baffle (20). The locking bolt (28) is tightened to fix the limit baffle (20) at a designated position on the slide rail (19).
8. The copper pipe welding fixture for an air source heat pump four-way valve as described in claim 7, characterized in that: A positioning bolt (23) is threaded onto the side wall at the bottom end of the slide rail (19). The positioning bolt (23) is tightened to fix the slide rail (19) at a designated position on the top surface of the base (1).