Saddle-shaped convex ring branch pipe and stainless steel pipe welding shunt pipe structure
By designing a saddle-shaped convex ring branch pipe structure on stainless steel pipes, combining solder filling and mold casting to form molds, the problem of long and high cost of processing of stainless steel pipe shunt pipes is solved, and efficient and pressure-resistant welding effect is achieved.
Patent Information
- Application Number
- CN202420584569.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-25
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-03-25
AI Technical Summary
In refrigeration equipment, after using stainless steel pipes to replace copper pipes, the brazing process of the flange holes and branch pipes of the shunt pipes leads to problems such as long processing time and high cost.
The saddle-shaped convex ring branch pipe and stainless steel pipe welded pipe split pipe structure. By opening the main pipe drilling hole on the stainless steel pipe, inserting the branch pipe, and a saddle-shaped convex ring and convex ring diameter section are provided at the lower end of the branch pipe, and the solder is filled and molded. Cast forming, soldered in combination with bronze or nickel-based solder.
It reduces processing costs, improves welding strength and pressure resistance, avoids secondary processing of flange process, prevents cracking and leakage of welds, and improves processing efficiency.
Smart Images
Figure CN222186182U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of refrigeration equipment, in particular to a saddle-shaped convex ring branch pipe and a stainless steel pipe welded shunt pipe structure. Background Art
[0002] At present, pipe fittings are needed to transmit refrigerants in refrigeration equipment systems, and some of the pipes need to be diverted. The industry routinely uses the extraction or extraction process to process the flanged holes on the copper tube and braze the branch pipes (such as Figure 6 As shown); With the advancement of the technology of replacing copper with stainless steel, some copper tubes have been replaced by stainless steel tubes. During the replacement process, the shunt tube still uses the process of flanging holes and branch tube brazing. Compared with copper tubes, stainless steel tubes have higher hardness and poorer ductility. Therefore, the flanging process takes longer time than copper, so the processing cost increases significantly.
[0003] Therefore, there is an urgent need for a structure with low cost, high pressure resistance and high welding strength to reduce costs and improve processing efficiency. Utility Model Content
[0004] The utility model aims to provide a saddle-shaped convex ring branch pipe and a stainless steel pipe welded shunt pipe structure to solve the problems raised in the above background technology.
[0005] The technical solution adopted by the utility model is as follows:
[0006] A saddle-shaped convex ring branch pipe and a stainless steel pipe welded shunt pipe structure, comprising a stainless steel pipe, a plurality of main pipe boreholes are opened on the stainless steel pipe, branch pipes are inserted into the main pipe boreholes, a saddle-shaped convex ring is provided at the lower end of the branch pipe, a convex ring lower end sizing section is provided at the lower end of the saddle-shaped convex ring, and the convex ring lower end sizing section is inserted into the main pipe borehole.
[0007] Preferably, the lower end surface of the saddle-shaped convex ring coincides with the upper end surface of the main pipe bore.
[0008] Preferably, the branch pipe body, the saddle-shaped convex ring and the sizing section at the lower end of the convex ring adopt an integrated structure, which is formed by mold casting.
[0009] Preferably, the connection between the sizing section at the lower end of the convex ring and the main pipe drilling hole is filled with solder for use in a welding process.
[0010] Preferably, the solder is bronze solder or nickel-based solder.
[0011] Preferably, a plurality of radial grooves are provided on the outer side of the sizing section at the lower end of the convex ring for solder flow and penetration.
[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:
[0013] In the utility model, the flanging of the stainless steel main pipe commonly used in the current industry is eliminated, and the secondary processing of other processes caused by the flanging process is reduced. For example, when there is a flanging in the middle of the pipe body of a multi-bend pipe, the bend needs to be processed in steps. The drilling process can avoid the step-by-step processing of other processes and reduce costs. Moreover, the saddle convex ring designed for the branch pipe is consistent with the contour of the edge of the drilled hole of the main pipe, which can effectively limit the position and prevent the vibration generated during the operation of the air conditioner from causing cracking of the weld. At the same time, there is an outward turning edge, which increases the contact surface and can avoid leakage of the weld. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0015] Figure 2 This is a schematic diagram of the structure of the utility model at position I;
[0016] Figure 3 This is a schematic diagram of the split structure of the utility model;
[0017] Figure 4 It is a schematic diagram of the structure of the utility model at II;
[0018] Figure 5 This is a schematic diagram of the saddle-shaped convex ring structure of the utility model;
[0019] Figure 6 This is a schematic diagram of the existing structure;
[0020] In the figure: 1. stainless steel pipe; 1-1. main pipe drilling hole; 2. branch pipe; 2-1. saddle-shaped convex ring; 2-2. sizing section at the lower end of the convex ring; 3. solder. DETAILED DESCRIPTION
[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0022] Embodiment 1:
[0023] A saddle-shaped convex ring branch pipe and a stainless steel pipe welded shunt pipe structure, such as Figure 1-5 As shown, it includes a stainless steel pipe 1, on which a plurality of main bore holes 1-1 are opened, in which a branch pipe 2 is inserted, and at the lower end of the branch pipe 2 there is a saddle-shaped convex ring 2-1, at the lower end of the saddle-shaped convex ring 2-1 there is a convex ring lower end sizing section 2-2, and the convex ring lower end sizing section 2-2 is inserted in the main bore hole 1-1.
[0024] Furthermore, the branch pipe 2 is inserted into the drilled connection port 1-1 of the main pipe 1, so that the branch pipe portion 2-2 cooperates with the main pipe 1-1 to form a certain gap space, and at the same time the main pipe portion 2-1 fits with the main pipe 1-1 to play the role of axial limit and length fixing.
[0025] In a possible implementation manner, the lower end surface of the saddle-shaped convex ring 2-1 coincides with the upper end surface of the main pipe bore 1-1.
[0026] Furthermore, the saddle-shaped convex ring 2-1 of the branch pipe fits perfectly with the contour of the main pipe drilling hole, which can effectively prevent the branch pipe from shifting in the axial and radial directions. At the same time, the arc structure can effectively reduce the residual time of liquid in the air in the weld and reduce the risk of weld corrosion.
[0027] In a possible implementation manner, the main body of the branch pipe 2, the saddle-shaped convex ring 2-1 and the sizing section 2-2 at the lower end of the convex ring are of an integrated structure, which is formed by mold casting.
[0028] In a possible implementation, the connection between the sizing section 2-2 at the lower end of the convex ring and the main bore hole 1-1 is filled with solder 3 (in paste form) for use in a welding process.
[0029] In a possible implementation manner, the solder 3 is bronze solder or nickel-based solder.
[0030] In a possible implementation manner, a plurality of radial grooves are provided on the outer side of the sizing section 2-2 at the lower end of the convex ring for solder flow and penetration.
[0031] Furthermore, the branch pipe 2 and the stainless steel pipe 1 are not limited to straight pipes or curved pipes;
[0032] Furthermore, by designing a saddle-shaped convex ring welding structure with the same profile as the main pipe after punching, the contact area of the weld solder is increased, the compressive strength of the pipeline parts is increased, and leakage of the weld can be avoided;
[0033] Furthermore, by designing a saddle-shaped convex ring welding structure with the same profile as the main pipe after punching, it can effectively limit the position, and the weld joint of the branch pipe after insertion and welding has the effect of anti-vibration and anti-cracking;
[0034] Embodiment 2:
[0035] An implementation method of a saddle-shaped convex ring branch pipe and a stainless steel pipe welded shunt pipe structure includes the following steps:
[0036] ① Standard copper tubes or stainless steel tubes commonly used in the industry are selected to make branch pipes 2. Branch pipes 2 are made into saddle-shaped convex rings 2-1 using a special molding die. The contour of the convex ring is consistent with the contour of the main pipe after punching. At the same time, there is a straight line segment with a specific length and outer diameter at the lower end of the convex ring for insertion into the main pipe for positioning;
[0037] ② Select the stainless steel pipe commonly used in the industry, use the punching equipment to punch holes in the steel pipe, and obtain the main pipe drilling hole 1-1. The hole diameter is slightly smaller than or equal to the outer diameter of the branch pipe (specific size);
[0038] ③ Assemble the branch pipe into the drilled hole of the stainless steel pipe, and use a press to press the branch pipe so that the contour of the saddle convex ring of the branch pipe fits the contour of the stainless steel main hole;
[0039] ④ Use bronze solder or nickel-based solder as solder, whose liquidus temperature is higher than that of conventional flame brazing solder;
[0040] (Liquidus of bronze solder is 1030℃, liquidus of nickel-based solder is 1000℃, liquidus of conventional phosphor copper or low silver solder is 850℃)
[0041] ⑤ Add solder to the above assembly and fix it by using oxygen-free furnace welding.
[0042] By adopting the above technical solution:
[0043] ①The main branch pipe is changed from copper pipe to stainless steel pipe to reduce material cost and improve the pressure resistance of the pipe;
[0044] ②Cancel the stainless steel main pipe flange commonly used in the industry ( Figure 6 ), reduce the secondary processing of other processes caused by the flanging process. For example, when there is a flanging in the middle of the multi-bend pipe body, the bend needs to be processed in steps. The drilling process can avoid the step-by-step processing of other processes;
[0045] ③ The saddle convex ring of the branch pipe design is consistent with the contour of the edge of the main pipe drilling hole, which can effectively limit the position and prevent the vibration generated during the operation of the air conditioner from causing the weld to crack. At the same time, there is an outward edge to increase the contact surface and avoid weld leakage.
[0046] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A saddle-shaped convex ring branch pipe and a stainless steel pipe welded shunt pipe structure, characterized in that: The invention comprises a stainless steel pipe (1), wherein a plurality of main boreholes (1-1) are formed on the stainless steel pipe (1), wherein a branch pipe (2) is inserted into the main borehole (1-1), wherein a saddle-shaped convex ring (2-1) is provided at the lower end of the branch pipe (2), wherein a convex ring lower end sizing section (2-2) is provided at the lower end of the saddle-shaped convex ring (2-1), and wherein the convex ring lower end sizing section (2-2) is inserted into the main borehole (1-1).
2. A saddle-shaped convex ring branch pipe and a stainless steel pipe welded shunt pipe structure as claimed in claim 1, characterized in that: The lower end surface of the saddle-shaped convex ring (2-1) coincides with the upper end surface of the main pipe bore (1-1).
3. A saddle-shaped convex ring branch pipe and a stainless steel pipe welded shunt pipe structure as claimed in claim 1, characterized in that: The branch pipe (2) main body, the saddle-shaped convex ring (2-1) and the sizing section (2-2) at the lower end of the convex ring adopt an integrated structure and are formed by mold casting.
4. A saddle-shaped convex ring branch pipe and a stainless steel pipe welded shunt pipe structure as claimed in claim 1, characterized in that: The connection between the sizing section (2-2) at the lower end of the convex ring and the main pipe drilling hole (1-1) is filled with solder (3) for use in a welding process.
5. A saddle-shaped convex ring branch pipe and a stainless steel pipe welded shunt pipe structure as claimed in claim 4, characterized in that: The solder (3) is bronze solder or nickel-based solder.
6. A saddle-shaped convex ring branch pipe and a stainless steel pipe welded shunt pipe structure as claimed in claim 4, characterized in that: A plurality of radial grooves are provided on the outer side of the sizing section (2-2) at the lower end of the convex ring for solder flow and penetration.