WO2023143087A1

WO2023143087A1 - End cover machining method, end cover, and pipeline assembly

Info

Publication number: WO2023143087A1
Application number: PCT/CN2023/071820
Authority: WO
Inventors: 管明明; 段宇建; 王文杰
Original assignee: 浙江盾安人工环境股份有限公司
Priority date: 2022-01-27
Filing date: 2023-01-11
Publication date: 2023-08-03

Abstract

An end cover machining method. The end cover comprises an annular part (10), which is made of a powder metallurgy material. Also disclosed is an end cover and a pipeline assembly. The pipeline assembly comprises a first pipeline (40), a second pipeline (50) and the end cover. The end cover comprises the annular part, the inner wall of the annular part is connected to the outer wall of the first pipeline, and the outer wall of the annular part is connected to the inner wall of the second pipeline. The powder metallurgy material is used for manufacturing the annular part. The porous characteristic of powder is fully utilized, and the surface roughness is increased; moreover, wetting of a solder is facilitated, and the molten solder can smoothly permeate into soldering contact surfaces with the first pipeline and the second pipeline, so that soldering effects between the inner wall of the annular part and the first pipeline, and between the outer wall of the annular part and the second pipeline are improved. The end cover machining method solves the problem of a poor soldering effect of a machining material, a first pipeline and a second pipeline.

Description

End cap processing method, end cap and pipeline components

This application claims the priority of the patent application submitted to the State Intellectual Property Office of China on January 27, 2022, the application number is 202210102097.1, and the invention name is "end cap processing method, end cap and pipeline assembly"; Submitted to the State Intellectual Property Office on January 27, 2022, the priority of the patent application with the application number 202220233667.6 and the invention name "end cap and pipeline assembly".

technical field

The present application relates to the technical field of refrigeration equipment, and in particular, to an end cover processing method, an end cover and a pipeline assembly.

Background technique

In the prior art, the end caps are usually machined from stainless steel rods, which has high processing costs, and when welding, due to the large tolerance of the pipes (about 1% of the pipe diameter), the end caps and the pipes are too tight Cooperate, resulting in poor welding effect, in order to increase the welding contact surface of the end cap and the pipeline, it is necessary to set the spruce on the end cap or the pipeline, which will increase the production cost.

Contents of the invention

The present application provides a method for processing an end cap, an end cap and a pipeline assembly, so as to solve the problem of poor welding effect of the end cap in the prior art.

In order to solve the above problems, according to one aspect of the present application, the present application provides a method for processing an end cap, the end cap includes a ring piece, and the method for processing the end cover includes: using powder metallurgy materials to make the ring piece.

Alternatively, the end cover further includes a first end plate, the first end plate is a ring structure, and the end cover processing method further includes: using a plate to make the first end plate; using solder to braze and connect the first end plate and one side of the ring .

Further, the solder is a metal foil located between the ring and the first end plate; using powder metallurgy material to make the ring is: extruding the powder metallurgy material to form the shape of the ring; combining the first end plate and the ring The side brazing connection includes: jointly heating the ring piece, the first end plate and the metal foil, and during the process of sintering the ring piece, the metal foil is melted to realize the brazing connection of the ring piece and the first end plate.

Alternatively, the solder is a metal foil located between the ring and the first end plate; using powder metallurgy materials to make the ring is: sintering the powder metallurgy material to form the ring; brazing one side of the first end plate and the ring The method includes: after the ring is sintered and formed, jointly heating the ring, the first end plate and the metal foil to realize the brazing connection of the ring and the first end plate.

Alternatively, the solder is a powder material; using the powder metallurgy material to make the ring is: mixing the solder in the powder metallurgy material and extruding to form the shape of the ring; brazing the ring and the first end plate includes: heating together The first end plate and the ring piece mixed with solder, during the process of sintering and forming the ring piece, the melted solder diffuses to the surface of the ring piece to realize the brazing connection between the ring piece and the first end plate.

Alternatively, the solder is a powder material; using the powder metallurgy material to make the ring is: mixing the solder in the powder metallurgy material and sintering the ring, during the process of sintering the ring, the solder melts and diffuses to the surface of the ring; The brazing connection of the ring part and the first end plate includes: after the ring part is sintered and formed, heating the ring part, the first end plate and the solder together to realize the brazing connection of the ring part and the first end plate.

Further, in the mixture of solder and powder metallurgy material, the mass fraction of solder is greater than 3%.

Alternatively, the end cover further includes a second end plate, the second end plate is a ring structure, and the end cover processing method further includes: using a plate to make the second end plate; using solder to braze the second end plate and the other side of the ring connect.

Further, the first end plate and the second end plate are formed by stamping or laser cutting.

Further, the density of the first end plate and the second end plate is greater than that of the ring.

Further, the melting point of the solder is lower than the melting point of the ring and the first end plate; the material of the ring is iron-based alloy, nickel-based alloy or copper-based alloy, and the material of the first end plate is iron-based alloy, nickel-based alloy or Copper-based alloy, the material of the solder is iron-based alloy, nickel-based alloy, copper-based alloy or tin-based alloy.

According to another aspect of the present application, an end cap is provided, and the end cap is processed by the above-mentioned end cap processing method.

Further, the end cover includes a first end plate and solder, the first end plate is a ring structure, the first end plate has a first positioning post, the ring has a first positioning groove, and the first positioning post extends into the first positioning In the groove, the first end plate and one side of the ring are connected by soldering.

Further, the end cover also includes a second end plate, the second end plate is a ring structure, the second end plate has a second positioning post, the ring has a second positioning groove, and the second positioning post extends into the second positioning recess In the slot, the second end plate is brazed to the other side of the ring.

Further, the outer wall of the annular member has an annular step, and the area between the annular step and the second end plate is used for placing solder.

Further, the outer diameter of the first end plate is greater than the outer diameter of the ring, the outer diameter of the ring is equal to the outer diameter of the second end plate, the inner diameter of the first end plate is equal to the inner diameter of the ring, and the inner diameter of the ring is larger than the second The inner diameter of the end plate.

Further, the solder is metal foil, and the metal foil is processed separately, or the metal foil and the first end plate are integrally structured; wherein, the metal foil is the plating layer on the first end plate or the metal foil and the first end plate are rolled composite panels.

According to another aspect of the present application, a pipeline assembly is provided. The pipeline assembly includes a first pipeline, a second pipeline, and the above-mentioned end cap. The outer wall of the ring is welded to the inner wall of the second pipeline.

Applying the technical solution of the present application, a method for processing an end cover is provided. The end cover includes a ring piece. The method for processing the end cover includes: using powder metallurgy materials to make the ring piece. With this scheme, powder metallurgy materials are used to make ring parts, which can make full use of the porous characteristics of the powder, increase the surface roughness, and also facilitate the wetting of the solder, and the melted solder can smoothly penetrate into the first pipeline, The welding contact surface of the second pipe, thereby improving the inner wall of the ring and the first pipe, the ring The outer wall of the shape and the welding effect of the second pipeline. Utilizing the end cover processing method of the proposal, the problem of poor welding effect between the machined material and the first and second pipelines is solved.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide further understanding of the present application, and the schematic embodiments and descriptions of the present application are used to explain the present application, and do not constitute an improper limitation of the present application. In the attached picture:

Figure 1 shows a cross-sectional view of an end cap provided in Embodiment 2 of the present application;

Figure 2 shows a cross-sectional view of the end cap provided by Embodiment 3 of the present application;

Fig. 3 shows a cross-sectional view of an end cap provided in Embodiment 4 of the present application;

Fig. 4 shows the cross-sectional view of the end cap provided by Embodiment 5 of the present application;

Fig. 5 shows a cross-sectional view of the pipeline assembly provided by Embodiment 6 of the present application.

Wherein, the above-mentioned accompanying drawings include the following reference signs:

10. Ring piece; 11. First positioning groove; 12. Second positioning groove; 13. Annular step;

20. The first end plate; 21. The first positioning column;

30. The second end plate; 31. The second positioning column;

40. The first pipeline; 50. The second pipeline.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Apparently, the described embodiments are only some of the embodiments of this application, not all of them. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way serves as any limitation of the application, its application or uses. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

Embodiment 1 of the present application provides a method for processing an end cap, the end cap includes a ring part 10 , and the method for processing the end cap includes: using powder metallurgy materials to make the ring part 10 .

The above-mentioned connection method is welding. With this scheme, powder metallurgy materials are used to make the ring 10, which can make full use of the porous characteristics of the powder, increase the surface roughness, and also facilitate the wetting of the solder, and the melted solder can penetrate smoothly. To the welding contact surfaces of the first pipeline 40 and the second pipeline 50 , thereby improving the welding effect of the inner wall of the ring 10 and the first pipeline 40 , and the outer wall of the ring and the second pipeline 50 . The end cover processing method of this solution solves the problem of poor welding effect between the machined material and the first pipeline 40 and the second pipeline 50 . Specifically, the inner wall of the ring 10 is used for connecting with the outer wall of the first pipeline 40 , and the outer wall of the ring 10 is used for connecting with the inner wall of the second pipeline 50 .

Or, the end cover also includes a first end plate 20, the first end plate 20 is a ring structure, and the end cover processing method also includes: using a plate to make the first end plate 20; using solder to connect the first end plate 20 and the ring 10 Solder connection on one side. By using solder to connect the first end plate 20 and one side of the ring 10 by brazing, and the first end plate 20 is made of a plate, such arrangement can enhance the sealing of the ring 10 side, and solve the problem of the ring 10. Made of powder metallurgy materials, there are problems of leakage risk and low compressive strength.

Wherein, the solder is a metal foil positioned between the ring 10 and the first end plate 20; using the powder metallurgy material to make the ring 10 is: extruding the powder metallurgy material to form the shape of the ring 10; the first end plate 20 and The brazing connection of one side of the ring part 10 includes: heating the ring part 10, the first end plate 20 and the metal foil together. Brazed connections. By setting the solder as a metal foil and placing it between the ring 10 and the first end plate 20, when the ring 10 is in the process of sintering, the ring 10, the first end plate 20 and the metal foil are heated together, through brazing Welding melts the metal foil, thereby connecting the ring member 10 and the first end plate 20, which solves the problems of low production efficiency and poor welding quality of welding methods such as argon arc welding and laser welding.

Alternatively, the solder is a metal foil positioned between the ring 10 and the first end plate 20; the powder metallurgy material is used to make the ring 10 as follows: the powder metallurgy material is sintered to form the ring 10; the first end plate 20 and the ring 10 The one-side brazing connection includes: after the ring 10 is sintered and formed, jointly heating the ring 10 , the first end plate 20 and the metal foil to realize the brazing connection of the ring 10 and the first end plate 20 . With the above arrangement, by setting the solder as metal foil and placing it between the ring 10 and the first end plate 20, after the ring 10 is sintered and formed, the ring 10, the first end plate 20 and the metal foil are jointly heated The metal foil is melted by brazing, thereby connecting the annular member 10 and the first end plate 20, which solves the problems of low production efficiency and poor welding quality of welding methods such as argon arc welding and laser welding.

Or, the solder is a powder material; using the powder metallurgy material to make the ring 10 is: mixing the solder in the powder metallurgy material and extruding to form the shape of the ring 10; connecting the ring 10 and the first end plate 20 by brazing Including: jointly heating the first end plate 20 and the ring piece 10 mixed with solder, during the process of sintering the ring piece 10, the melted solder diffuses to the surface of the ring piece 10 to realize the bonding between the ring piece 10 and the first end plate 20 Brazed connections. Mix the solder and powder metallurgy materials to form the shape of the ring 10 through extrusion. When the ring 10 is sintered and formed, the first end plate 20 and the ring 10 mixed with solder are heated together, and the melted solder will spread. To the surface of the ring member 10, the brazing connection between the first end plate 20 and the ring member 10 is realized. The above arrangement can improve production efficiency and improve welding quality.

Alternatively, the solder is a powder material; using the powder metallurgy material to make the ring 10 is: mixing the solder in the powder metallurgy material and sintering the ring 10, during the process of sintering the ring 10, the solder melts and diffuses to the ring 10 The surface of the ring part 10 and the first end plate 20 brazed connection includes: after the ring part 10 is sintered and formed, the ring part 10, the first end plate 20 and the solder are jointly heated to realize the ring part 10 and the first end plate 20 brazed connections. The solder and powder metallurgy materials are mixed to form the shape of the ring 10 through extrusion. When the ring 10 is sintered and formed, the melted solder will diffuse to the surface of the ring 10, and then the first end plate 20 and the first end plate 20 are heated together. Solder and sinter the ring piece 10 , so that the brazing connection of the ring piece 10 and the first end plate 20 is realized, and the above arrangement method can improve the production efficiency and improve the welding quality.

Wherein, in the mixture of solder and powder metallurgy material, the mass fraction of solder is greater than 3%. The mass fraction of the solder in the mixture of the solder and the powder metallurgy material is limited within the above numerical range, so as to ensure that a sufficient amount of solder diffuses to the surface of the annular member 10 to ensure welding quality.

Or, the end cover also includes a second end plate 30, the second end plate 30 is a ring structure, and the end cover processing method also includes: using a plate to make the second end plate 30; using solder to connect the second end plate 30 and the ring 10 Solder connection on the other side. By using solder to solder the second end plate 30 and the other side of the ring 10, and the second end plate 30 is made of a plate, such arrangement can enhance the sealing of the other side of the ring 10, further solving the problem The ring 10 has the problems of leakage risk and low compressive strength. Wherein, the welding method of the second end plate 30 and the ring member 10 is the same as the welding method of the first end plate 20 and the ring member 10 , which will not be repeated here.

In this embodiment, the first end plate 20 and the second end plate 30 are formed by stamping or laser cutting. By adopting the above methods, the fabrication of the first end plate 20 and the second end plate 30 can be completed.

Specifically, the density of the first end plate 20 and the second end plate 30 is greater than that of the ring member 10 . The density of the first end plate 20 and the second end plate 30 is set to be greater than that of the ring member 10, which can satisfy the structural strength and improve the sealing effect.

Specifically, the melting point of the solder is lower than the melting point of the ring 10 and the first end plate 20; the material of the ring 10 is an iron-based alloy, nickel-based alloy or copper-based alloy, and the material of the first end plate 20 is an iron-based alloy, Nickel-based alloy or copper-based alloy, the material of the solder is iron-based alloy, nickel-based alloy, copper-based alloy or tin-based alloy. The melting point of the solder is set to be lower than the melting point of the ring 10 and the first end plate 20, so that after the solder is melted, the ring 10 and the first end plate 20 are not melted, so that the ring 10 and the first end The brazing connection of the plate 20; the ring member 10 and the first end plate 20 and the solder can be selected from the above-mentioned materials, and different materials can be selected according to the actual demand for material thermal conductivity, friction coefficient, strength, toughness, etc., to solve the problem. The problem of limited material selection in the prior art. Wherein, the material of the second end plate 30 and the first end plate 20 are the same, the ring member 10 is located between the second end plate 30 and the first end plate 20, and the second end plate 30 can also be selected according to actual needs. Material.

As shown in FIG. 1 , in Embodiment 2 of this solution, an end cap is provided, and the end cap is processed by the above-mentioned end cap processing method. The annular piece 10 made by the above-mentioned end cap processing method, when connected with the first pipeline 40 and the second pipeline 50, can make full use of the porous characteristics of the powder, increase the roughness of the surface, and also increase the and the welding contact surface of the first pipeline 40 and the second pipeline 50, thereby improving the welding effect of the inner wall of the ring 10 and the first pipeline 40, and the outer wall of the ring and the second pipeline 50.

Optionally, the holes in the ring member 10 are straight holes or stepped holes.

As shown in Figure 2, in the third embodiment of this solution, the end cover includes a first end plate 20 and solder, the first end plate 20 is a ring structure, and the first end plate 20 has a first positioning column 21, the ring part 10 has a first positioning groove 11, a first positioning column 21 protrudes into the first positioning groove 11, and the first end plate 20 and one side of the ring member 10 are connected by soldering. By brazing the first end plate 20 and one side of the ring part 10 with solder, the sealing performance of one side of the ring part 10 can be enhanced, which solves the risk of leakage when the ring part 10 is made of powder metallurgy material. The problem of low compressive strength. Wherein, the first end plate 20 is configured as a ring structure, which matches the shape of the ring member 10 and is convenient for brazing connection. The fixing of the first end plate 20 and the ring member 10 is facilitated by providing the first positioning post 21 extending into the first positioning groove 11 . Wherein, the first positioning column 21 and the first end plate 20 have an integrated structure, which is convenient for processing and reduces costs.

As shown in Fig. 3, in Embodiment 4 of this solution, the end cover also includes a second end plate 30, the second end plate 30 is a ring structure, the second end plate 30 has a second positioning column 31, and the ring member 10 There is a second positioning groove 12 , the second positioning column 31 protrudes into the second positioning groove 12 , and the second end plate 30 is soldered to the other side of the ring member 10 . By setting the second end plate 30 and the other side of the ring member 10 to be brazed and connected, the ring member 10 is located between the second end plate 30 and the first end plate 20, which further enhances the compressive strength on both sides of the ring member 10 , and also effectively reduce the leakage risk of the ring 10 . The fixing of the second end plate 30 and the ring member 10 is facilitated by providing the second positioning post 31 extending into the second positioning groove 12 . Wherein, the second positioning column 31 and the second end plate 30 have an integrated structure, which is convenient for processing and reduces costs.

As shown in FIG. 4 , in the fifth embodiment of the solution, the outer wall of the annular member 10 has an annular step 13 , and the area between the annular step 13 and the second end plate 30 is used for placing solder. By setting the annular step 13, it can be used to place solder, and at the same time, it is also convenient for brazing connection between the end cover and the matching structure in the pipeline.

Specifically, the outer diameter of the first end plate 20 is greater than the outer diameter of the ring 10, the outer diameter of the ring 10 is equal to the outer diameter of the second end plate 30, the inner diameter of the first end plate 20 is equal to the inner diameter of the ring 10, and the ring The inner diameter of the member 10 is larger than the inner diameter of the second end plate 30 . Using the above-mentioned arrangement method, the outer diameter of the first end plate 20 is set to be greater than the outer diameter of the ring 10, so that when the outer wall of the ring 10 is connected to the second pipeline 50, it can play a position-limiting role; the ring The inner diameter of the member 10 is set to be greater than the inner diameter of the second end plate 30, so that when the inner wall of the annular member 10 is connected to the first pipeline 40, it can limit the first pipeline 40 and prevent the first pipeline 40 from Insertion is too deep, affecting fluid flow.

Further, the solder is metal foil, which is processed separately, or the metal foil and the first end plate 20 are integrated; wherein, the metal foil is the plating on the first end plate 20 or the metal foil and the first end plate 20 For rolled composite plate. In this embodiment, the metal foil and the first end plate 20 are provided as an integral structure, specifically, the metal foil is provided as a coating on the first end plate 20 or the metal foil and the first end plate 20 are provided as a rolled The composite plate is easy to fix the metal foil, which improves the structural strength and welding effect.

As shown in Figure 5, Embodiment 6 of the present application provides a pipeline assembly, the pipeline assembly includes a first pipeline 40, a second pipeline 50 and the above-mentioned end cover, the end cover includes a ring 10, the ring The inner wall of the ring 10 is connected with the outer wall of the first pipeline 40 , and the outer wall of the ring 10 is connected with the inner wall of the second pipeline 50 . Specifically, one end of the first pipeline 40 penetrates the ring 10 and is welded with the ring 10, a part of the ring 10 penetrates the second pipeline 50 and is welded with the second pipeline 50, the first pipeline 40 and the second pipeline The two pipelines 50 are connected. Adopting this solution can improve welding quality and reduce processing cost.

The advantages of this program are as follows:

1. The ring part 10 is formed by powder metallurgy, and the porous characteristics of the powder are used to increase the surface roughness, so as to solve the problem of difficult welding of machined materials and pipelines;

2. The first end plate 20 and the second end plate 30 are dense plates, which are brazed on both sides of the ring 10 to achieve sealing. 20 and the second end plate 30, which solves the risk of leakage and low compressive strength of the porous powder metallurgy material, and the middle ring 10 made of powder metallurgy material will not be exposed to air or refrigerant;

3. To solve the limitation of material selection, only the first end plate 20 and the second end plate 30 need to use materials that can meet the performance, and the middle ring piece 10 made of powder metallurgy material is soldered, the first end plate 20 and the second end plate Surrounded by two end plates 30, therefore, iron-based, copper-based, nickel-based and other materials can be used.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, there may be various modifications and changes in the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims

A method for processing an end cap, the end cap comprising a ring (10), characterized in that the method for processing the end cap comprises:

The ring (10) is made using powder metallurgy material.
The end cap processing method according to claim 1, characterized in that, the end cap further comprises a first end plate (20), and the first end plate (20) is an annular structure, and the end cap processing method further comprises include:

making the first end plate (20) from sheet material;

The first end plate (20) is soldered to one side of the ring (10) using solder.
The end cap processing method according to claim 2, characterized in that,

said solder is a metal foil located between said ring (10) and said first end plate (20);

Using powder metallurgy material to make the ring (10) is: extruding the powder metallurgy material to form the shape of the ring (10);

The brazing connection of the first end plate (20) and one side of the ring member (10) comprises: jointly heating the ring member (10), the first end plate (20) and the metal foil , during the process of sintering and forming the annular member (10), the metal foil is melted to realize the brazing connection between the annular member (10) and the first end plate (20).
The end cap processing method according to claim 2, characterized in that,

said solder is a metal foil located between said ring (10) and said first end plate (20);

Using powder metallurgy materials to make the ring (10) is: sintering powder metallurgy materials to form the ring (10);

The brazing connection of the first end plate (20) and one side of the ring (10) includes: after the ring (10) is sintered and formed, jointly heating the ring (10), the The first end plate (20) and the metal foil, so as to realize the brazing connection of the ring member (10) and the first end plate (20).
The end cap processing method according to claim 2, characterized in that,

The solder is a powder material;

Using powder metallurgy material to make the ring (10) is: mixing the solder into the powder metallurgy material and extruding to form the shape of the ring (10);

The brazing connection of the ring part (10) and the first end plate (20) comprises: jointly heating the first end plate (20) and the ring part (10) mixed with the solder, In the process of sintering and forming the ring part (10), the melted solder diffuses to the surface of the ring part (10) to realize brazing of the ring part (10) and the first end plate (20). Solder connection.
The end cap processing method according to claim 2, characterized in that,

The solder is a powder material;

Using powder metallurgy material to make the ring (10) is: mixing the solder into the powder metallurgy material and sintering the ring (10), during the process of sintering the ring (10), the said solder melts and spreads to the surface of said ring (10);

The brazing connection of the ring member (10) and the first end plate (20) includes: after the ring member (10) is sintered and formed, jointly heating the ring member (10), the first end plate plate (20) and said solder to achieve a soldered connection of said ring (10) and said first end plate (20).
The end cap processing method according to claim 5 or 6, characterized in that, in the mixture of the solder and the powder metallurgy material, the mass fraction of the solder is greater than 3%.
The end cap processing method according to claim 2, characterized in that, the end cap further comprises a second end plate (30), and the second end plate (30) is a ring structure, and the end cap processing method further comprises include:

making the second end plate (30) from sheet material;

The second end plate (30) is soldered to the other side of the ring (10) using solder.
The end cover processing method according to claim 8, characterized in that, the first end plate (20) and the second end plate (30) are formed by stamping or laser cutting.
The end cover processing method according to claim 8, characterized in that, the density of the first end plate (20) and the second end plate (30) is greater than the density of the ring member (10).
The end cap processing method according to claim 2, characterized in that, the melting point of the solder is lower than the melting point of the ring piece (10) and the first end plate (20); the ring piece (10) The material of the solder is an iron-based alloy, a nickel-based alloy or a copper-based alloy, the material of the first end plate (20) is an iron-based alloy, a nickel-based alloy or a copper-based alloy, and the material of the solder is an iron-based alloy, nickel base alloy, copper base alloy or tin base alloy.
An end cap, characterized in that the end cap is processed by the end cap processing method according to any one of claims 1 to 11.
The end cover according to claim 12, characterized in that, the end cover comprises a first end plate (20) and solder, the first end plate (20) is an annular structure, and the first end plate (20 ) has a first positioning post (21), the ring (10) has a first positioning groove (11), and the first positioning post (21) extends into the first positioning groove (11) , the first end plate (20) and one side of the annular member (10) are brazed connected by the solder.
The end cover according to claim 13, characterized in that, the end cover further comprises a second end plate (30), the second end plate (30) is an annular structure, and the second end plate (30) There is a second positioning post (31) on it, the ring member (10) has a second positioning groove (12), and the second positioning post (31) extends into the second positioning groove (12), The second end plate (30) is soldered to the other side of the ring (10).
The end cap according to claim 14, characterized in that, the outer wall of the annular member (10) has an annular step (13), and the gap between the annular step (13) and the second end plate (30) area for placing the solder.
The end cap according to claim 14, characterized in that, the outer diameter of the first end plate (20) is greater than the outer diameter of the ring (10), and the outer diameter of the ring (10) is equal to the The outer diameter of the second end plate (30), the inner diameter of the first end plate (20) is equal to the inner diameter of the ring (10), and the inner diameter of the ring (10) is larger than the second end plate (30) inner diameter.
The end cap according to claim 13, wherein the solder is metal foil,

The metal foil is processed separately,

Or the metal foil and the first end plate (20) are integrally structured;

Wherein, the metal foil is a coating on the first end plate (20) or the metal foil and the first end plate (20) are rolled composite plates.
A pipeline assembly, characterized in that the pipeline assembly comprises a first pipeline (40), a second pipeline (50) and an end cap according to any one of claims 12 to 17, wherein The end cap comprises a ring (10), the inner wall of the ring (10) is connected to the outer wall of the first pipeline (40), the outer wall of the ring (10) is connected to the second pipeline ( 50) the inner wall connection.