Stainless steel gas collector assembly

Abstract

This is a stainless steel gas collector pipe assembly (100). The stainless steel gas collector pipe assembly (100) includes a stainless steel main pipe (10), a branch pipe (20), and a connecting pipe (30), wherein the connecting pipe (30) and the stainless steel main pipe (10) are separate structures, one end of the connecting pipe (30) is connected to the stainless steel main pipe (10), and a connecting hole (321) is formed at the other end of the connecting pipe (30), and the branch pipe (20) is connected to one end of the connecting pipe (30) where the connecting hole (321) is formed, or the connecting pipe (30) and the stainless steel main pipe (10) are an integral structure, and the connecting pipe (30) has a connecting hole (321), and an enlarged diameter segment (21) is provided at one end of the branch pipe (20), at least a portion of the enlarged diameter segment (21) is located in the connecting hole (321), and the branch pipe (20) is connected to the connecting pipe (30) via the enlarged diameter segment (21).

Description

Technical Field

[0001] (Related Application) This application claims the priority of a Chinese patent application with application number 202321313442.2 and title "Stainless Steel Manifold Assembly" filed on May 25, 2023, the entire text of which is incorporated herein by reference.

[0002] This application relates to the field of cooling, and particularly to a stainless steel manifold assembly.

Background Art

[0003] The manifold assembly is widely applied in a cooling system and is used for the flow and distribution of refrigerant. The manifold includes a main pipe and branch pipes. The inner diameter of the main pipe is larger than that of the branch pipes. The main pipe is connected to the branch pipes. Both the main pipe and the branch pipes are manufactured using metal copper, and due to the high cost, in some manifold assemblies, the material of the main pipe has been changed to stainless steel. However, the main pipe made of stainless steel has a high hardness and cannot perform a significant reduction in diameter, making it difficult to connect to the branch pipes.

Summary of the Invention

[0004] Based on this, a stainless steel manifold assembly is provided.

[0005] A stainless steel manifold assembly comprising a stainless steel main pipe, branch pipes, and connecting pipes. The connecting pipes and the stainless steel main pipe have a separate structure. One end of the connecting pipe is connected to the stainless steel main pipe, and a connecting hole is formed at the other end of the connecting pipe. The aperture diameter of the connecting hole is smaller than the inner diameter of the stainless steel main pipe. The branch pipes are connected to one end of the connecting pipe where the connecting hole is formed, or the connecting pipes and the stainless steel main pipe have an integral structure. A connecting hole is formed in the connecting pipe, and the aperture diameter of the connecting hole is smaller than the inner diameter of the stainless steel main pipe. A diameter-expanded segment is provided at one end of the branch pipe, and at least a part of the diameter-expanded segment is located in the connecting hole. The branch pipes are connected to the connecting pipes through the diameter-expanded segments.

[0006] In one embodiment, the connecting pipe includes a first pipe segment and a second pipe segment, the first pipe segment being connected to a stainless steel main pipe, the second pipe segment being connected to one end of the first pipe segment, the second pipe segment being connected to a branch pipe, and a connecting hole being formed in the second pipe segment.

[0007] In one embodiment, when the connecting pipe and the stainless steel main pipe are separate structures, the first pipe segment is fitted to the outer wall of the stainless steel main pipe, or the first pipe segment is inserted into the stainless steel main pipe, where the first pipe segment is welded to the stainless steel main pipe.

[0008] In one embodiment, the second pipe segment is located outside the first pipe segment and extends away from the stainless steel main pipe, the branch pipe is fitted into the outer wall of the second pipe segment or inserted into a connection hole, and the second pipe segment is welded to the branch pipe.

[0009] In one embodiment, the second pipe segment is located within the first pipe segment and extends in a direction close to the stainless steel main pipe, the branch pipe is inserted into the connection hole, and the second pipe segment is welded to the branch pipe.

[0010] In one embodiment, when the connecting pipe and the stainless steel main pipe are separate structures, a flange is provided on the outer peripheral wall of one end of the first pipe segment away from the second pipe segment, the first pipe segment is inserted into the stainless steel main pipe, the second pipe segment is located inside the stainless steel main pipe, the flange abuts against the end face of the stainless steel main pipe, and the flange and / or the first pipe segment are welded to the stainless steel main pipe.

[0011] In one embodiment, the second pipe segment is located within the first pipe segment and extends toward the flange, or the second pipe segment is located outside the first pipe segment and extends toward the flange, the branch pipe is inserted into the connection hole, and the second pipe segment is welded to the branch pipe.

[0012] In one embodiment, the first pipe segment includes a main body portion and a transition portion. The main body portion is connected to the transition portion, and the transition portion is located between the main body portion and the second pipe segment and is inclined toward the second pipe segment.

[0013] In one embodiment, a limiting member is provided at one end of the branch pipe. When the connecting pipe and the branch pipe are connected, the limiting member can form a limiting engagement with the connecting pipe and is provided as any one of a reduced-diameter port, a positioning point, or a positioning ring.

[0014] In one embodiment, when the connecting pipe and the stainless steel main pipe are integrally formed, if the diameter of the connecting hole is defined as R2 and the diameter of the stainless steel main pipe is defined as R1, then R1 and R2 satisfy 0.6R1 ≤ R2 < R1.

[0015] Details of one or more embodiments of the present application are described in the following drawings and description. Other features, objects, and advantages of the present application are apparent from the specification, the drawings, and the claims.

Brief Description of the Drawings

[0016] To better illustrate and exemplify the embodiments and / or examples of the inventions disclosed in this specification, one or more drawings can be referred to. Additional details or exemplifications for explaining the drawings should not be construed as limiting the scope of any of the disclosed inventions, the embodiments and / or examples described in this specification, and the best mode currently understood for these inventions.

[0017] [Figure 1] It is a structural schematic diagram of a stainless steel air collecting pipe assembly according to an embodiment of the present application. [Figure 2] It is a partial enlarged view of location A in FIG. 1. [Figure 3] It is a cross-sectional view of a connecting pipe according to an embodiment of the present application. [Figure 4] It is a cross-sectional view of a connecting pipe according to an embodiment of the present application. [Figure 5]This is a cross-sectional view of a connecting pipe according to one embodiment of the present application. [Figure 6] This is a schematic diagram of the structure of a stainless steel gas collector assembly according to one embodiment of the present application. [Figure 7] This is a magnified view of area B in Figure 6.

[0018] The symbols in the diagram are as follows: 100 stainless steel air collection pipe assemblies, 10 stainless steel main pipes, 20 branch pipes, 21 enlarged diameter segments, 30 connecting pipes, 31 First pipe segment, 311 Flange, 312 Main body, 313 Transition section, 32 Second pipe segment, 321 Connection hole. [Modes for carrying out the invention]

[0019] To better understand the above-mentioned objectives, features, and advantages of this application, specific embodiments of this application are described in detail below with reference to the drawings. In the following description, various specific details are included to facilitate a full understanding of this application. However, this application is not limited to the specific embodiments disclosed below, as it can be implemented in many other forms different from those described herein, and those skilled in the art can make similar improvements as long as they do not contradict the content of this application.

[0020] Furthermore, when one mechanism is described as being "fixed" or "provided" to another mechanism, it may be directly provided to the other mechanism, or an intervening mechanism may exist. When one mechanism is described as being "connected" to another mechanism, it may be directly connected to the other mechanism, or an intervening mechanism may exist simultaneously. The terms “vertical,” “horizontal,” “up,” “down,” “left,” and “right,” and similar expressions used in the specification of this application, are for illustrative purposes only and do not indicate that they represent only one embodiment.

[0021] Furthermore, the terms "first" and "second" are for illustrative purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the recited technical features. Accordingly, features defined by "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, "a plurality of" means at least two, for example, two, three, etc., unless there is a clear and specific limitation.

[0022] In this application, unless there are particularly clear provisions and limitations, the statement that the first feature is "above" or "below" the second feature may mean that the first feature and the second feature are in direct contact, or that the first feature and the second feature are indirectly in contact through an intermediate medium. Furthermore, the statement that the first feature is "above", "upward" or "upper side" of the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply that the horizontal height of the first feature is higher than that of the second feature. The statement that the first feature is "below", "downward" or "lower side" of the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply that the horizontal height of the first feature is lower than that of the second feature.

[0023] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the art of this application. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the associated listed items.

[0024] Referring to FIGS. 1 to 3, this application provides a stainless steel air collector assembly 100, which is applied to a cooling system for use in the flow of refrigerant and solves the connection problem between the stainless steel main pipe 10 and the branch pipe 20.

[0025] The stainless steel gas collection pipe assembly 100 includes a stainless steel main pipe 10, a branch pipe 20, and a connecting pipe 30, the stainless steel main pipe 10 and the branch pipe 20 being connected and communicating with each other via the connecting pipe 30.

[0026] For example, in one embodiment, the connecting pipe 30 and the stainless steel main pipe 10 are separate structures. In this way, the stainless steel main pipe 10 is connected to and communicates with the branch pipe 20 via the connecting pipe 30, and the connecting pipe 30 allows the stainless steel main pipe 10 to be in close contact with the branch pipe 20 without contracting. Specifically, one end of the connecting pipe 30 is connected to the stainless steel main pipe 10, and a connecting hole 321 is formed at the other end of the connecting pipe 30. The diameter of the connecting hole 321 is smaller than the inner diameter of the stainless steel main pipe 10, and the branch pipe 20 is connected to the end of the connecting pipe 30 where the connecting hole 321 is formed.

[0027] Furthermore, the statement that "the connecting pipe 30 and the stainless steel main pipe 10 are separate structures" means that the connecting pipe 30 and the stainless steel main pipe 10 may be formed independently and separately, and may also be connected to each other by methods such as locking, welding, or crimping.

[0028] For example, in this embodiment, the connecting tube 30 is formed by a tensioning process, and the connecting hole 321 is formed in the connecting tube 30 after tensioning. Thus, the tensioning process is fast and has low processing costs, and the connecting tube 30 formed by tensioning has a smooth surface and gentle curves, which can reduce resistance to the flow of the medium.

[0029] In other embodiments, the connecting pipe 30 and the stainless steel main pipe 10 have an integral structure. As shown in FIGS. 6 to 7, at one end of the stainless steel main pipe 10, the connecting pipe 30 is integrally formed by spinning with a small stroke, and a connecting hole 321 is formed in the connecting pipe 30 after spinning. The aperture diameter of the connecting hole 321 is smaller than the inner diameter of the stainless steel main pipe 10 and larger than the inner diameter of the branch pipe 20. In order to realize the connection with the branch pipe 20, a diameter-expanded segment 21 is provided at one end of the branch pipe 20, and at least a part of the diameter-expanded segment 21 is located in the connecting hole 321, and the diameter-expanded segment 21 is connected to the connecting pipe 30. In this way, the connecting pipe 30 is formed by spinning the stainless steel main pipe 10 itself, without the need to增设 a separate structure, reducing the material cost, simplifying the assembly steps, and having better consistency between the connecting pipe 30 and the stainless steel main pipe 10. Also, since a diameter-expanded segment 21 is provided at one end of the branch pipe 20, the connection with the branch pipe 20 can be realized without excessively increasing the degree of spinning of the stainless steel main pipe 10, and the problem that it is difficult to significantly reduce the diameter due to the high hardness of the stainless steel material is solved.

[0030] Note that "the connecting pipe 30 and the stainless steel main pipe 10 have an integral structure" means that the connecting pipe 30 and the stainless steel main pipe 10 are formed into an overall structure by an integral molding method.

[0031] Specifically, referring to FIG. 7, if the diameter of the connecting hole 321 is defined as R2 and the diameter of the stainless steel main pipe 10 is defined as R1, then R1 and R2 satisfy 0.6R1≦R2<R1. In this way, by reasonably defining the spinning range of the stainless steel main pipe 10, it is avoided that after excessive spinning, the diameter R2 of the connecting hole 321 becomes excessively small and damages the stainless steel main pipe 10.

[0032] For example, 0.6R1 is simply the limit value after the stainless steel main pipe 10 is spun, and the diameter R2 of the connecting hole 321 may be 0.7R1, 0.8R1, or 0.9R1, etc., and is not limited to the above 0.6R1.

[0033] The connecting pipe 30 includes a first pipe segment 31 and a second pipe segment 32 that communicate with each other. The first pipe segment 31 is connected to the stainless steel main pipe 10, the second pipe segment 32 is provided on the end face of the first pipe segment 31, and a connection hole 321 is formed in the second pipe segment 32. The branch pipe 20 is connected to the second pipe segment 32 and also communicates with the stainless steel main pipe 10, and the diameter of the connection hole 321 is smaller than the inner diameter of the stainless steel main pipe 10. Thus, since the first pipe segment 31 is used for connection with the stainless steel main pipe 10 and the second pipe segment 32 is used for connection with the branch pipe 20, when the connection hole 321 is formed in the second pipe segment 32, the connection between the first pipe segment 31 and the stainless steel main pipe 10 is not affected, ensuring a stable connection between the connecting pipe 30 and the stainless steel main pipe 10. The second pipe segment 32 further increases the contact area where the connecting pipe 30 and the branch pipe 20 are connected, thereby improving the connection strength between the connecting pipe 30 and the branch pipe 20.

[0034] There are many examples of the specific structure and arrangement of the connecting pipe 30, which are described in detail herein.

[0035] Example 1 Referring to Figures 1 and 2, the first pipe segment 31 is fitted to the outer wall of the stainless steel main pipe 10, and the second pipe segment 32 is connected to one side of the first pipe segment 31 away from the stainless steel main pipe 10, and is located outside the first pipe segment 31 and extends in the direction away from the stainless steel main pipe 10. In this way, because the first pipe segment 31 is fitted to the outside of the stainless steel main pipe 10, the inner wall of the first pipe segment 31 and the end face of the stainless steel main pipe 10 naturally form an interference limiting structure, so that the connecting pipe 30 is stably locked to the outside of the stainless steel main pipe 10, and because the second pipe segment 32 is located outside the first pipe segment 31 and the stainless steel main pipe 10, the connection between the branch pipe 20 and the second pipe segment 32 is made easy, and connection processes such as welding can be easily performed between the branch pipe 20 and the second pipe segment 32.

[0036] In this embodiment, the branch pipe 20 may be fitted into the outer circumferential wall of the second pipe segment 32 or inserted into the connection hole 321. A limiting member (not shown) may be provided at one end of the branch pipe 20, and when the connecting pipe 30 and the branch pipe 20 are connected, the limiting member can form a limiting engagement with the connecting pipe 30, thereby fixing the relative position of the connecting pipe 30 and the branch pipe 20. Depending on the circumstances, the limiting member may be provided as one of the following: a diameter reduction port, a positioning point, or a positioning ring.

[0037] For example, when the branch pipe 20 is fitted to the outer circumferential wall of the second pipe segment 32, positioning points or positioning rings may be provided on the inner wall of the branch pipe 20, and the positioning points and positioning rings can restrict the movement of the branch pipe 20 toward the second pipe segment 32, thereby preventing the second pipe segment 32 from entering the branch pipe 20 excessively. Alternatively, the branch pipe 20 may be directly restricted via the transition portion 313 of the first pipe segment 31 for connecting the second pipe segment 32.

[0038] Specifically, the inner wall of the branch pipe 20 is provided with at least one projection, which serves as a positioning point. The number of projections may be increased depending on the requirements of the work. The inner wall of the branch pipe 20 may also be provided with a locking ring, such as a circlip or a rubber ring, which may serve as a positioning ring.

[0039] Of course, in other embodiments, the positioning point and positioning ring may have other structures, as long as they can be locked to the second pipe segment 32 to achieve restriction.

[0040] The branch pipe 20 may be inserted into the connection hole 321, thereby increasing the contact area between the branch pipe 20 and the connection hole 321, and making it easier to connect the branch pipe 20 and the connection pipe 30. In this embodiment, the branch pipe 20 may be provided with a diameter-reducing opening as a limiting member, and since the outer diameter of the diameter-reducing opening is smaller than the diameter of the connection hole 321, the diameter-reducing opening can enter the connection hole 321, and a step is naturally formed between the normal outer diameter portion of the branch pipe 20 and the diameter-reducing opening, and this step comes into contact with the second pipe segment 32, thereby preventing the branch pipe 20 from continuing to enter the connection hole 321.

[0041] Furthermore, the first pipe segment 31 includes a main body 312 and a transition section 313, the main body 312 being connected to the transition section 313, the transition section 313 being located between the main body 312 and the second pipe segment 32 and inclined toward the second pipe segment 32, so that the transition section 313 can act as a guide for the medium, the medium flowing from the stainless steel main pipe 10 to the first pipe segment 31, then gently guided by the transition section 313 toward the second pipe segment 32, and finally flowing into the branch pipe 20, reducing the turbulence of the medium.

[0042] Example 2 Referring to Figure 3, the first pipe segment 31 is fitted to the outer wall of the stainless steel main pipe 10, and the second pipe segment 32 is located inside the first pipe segment 31 and extends toward the stainless steel main pipe 10. In this way, because the first pipe segment 31 is fitted to the outside of the stainless steel main pipe 10, the inner wall of the first pipe segment 31 and the end face of the stainless steel main pipe 10 naturally form an interference limit, and the connecting pipe 30 is stably locked to the outside of the stainless steel main pipe 10. The second pipe segment 32 does not occupy space outside the stainless steel main pipe 10, thus saving space. Of course, in other embodiments, the second pipe segment 32 may be located outside the first pipe segment 31 and extend toward the stainless steel main pipe 10.

[0043] Example 3 Referring to Figure 4, the first pipe segment 31 is inserted into the stainless steel main pipe 10 and welded to the stainless steel main pipe 10, while the second pipe segment 32 is located within the first pipe segment 31 and extends toward the stainless steel main pipe 10. In this way, both the first pipe segment 31 and the second pipe segment 32 are located within the stainless steel main pipe 10, saving space occupied by the connecting pipe 30 and increasing the contact area between the first pipe segment 31 and the inner wall of the stainless steel main pipe 10, thereby improving connection strength. Similarly, in another embodiment, the second pipe segment 32 may be located outside the first pipe segment 31 and extend toward the stainless steel main pipe 10.

[0044] Example 4 Referring to Figure 5, a flange 311 is provided protruding from the outer circumferential wall of one end of the first pipe segment 31 that is away from the second pipe segment 32. The first pipe segment 31 is inserted into the stainless steel main pipe 10, the flange 311 abuts against the end face of the stainless steel main pipe 10, and the flange 311 and / or the first pipe segment 31 are welded to the stainless steel main pipe 10. In this way, the end faces of the flange 311 and the stainless steel main pipe 10 form a contact limit, preventing the connecting pipe 30 from penetrating excessively into the stainless steel main pipe 10.

[0045] In this embodiment, the first pipe segment 31 is inserted into the stainless steel main pipe 10, and the second pipe segment 32 is connected to the first pipe segment 31, located within the first pipe segment 31 and extending away from the stainless steel main pipe 10. Of course, the second pipe segment 32 may also be located outside the first pipe segment 31 and extending away from the branch pipe 20. The arrangement method of the connecting pipe 30 and its technical effects are similar to those of Embodiment 3, and will not be described here. The branch pipe 20 is inserted into the connecting hole 321, and the second pipe segment 32 is welded to the branch pipe 20.

[0046] In the above embodiment, the first pipe segment 31 may be welded to the stainless steel main pipe 10 so that the first pipe segment 31 is stably connected to the stainless steel main pipe 10. Of course, in other embodiments, the first pipe segment 31 and the stainless steel main pipe 10 may be connected by other connection methods such as interference fit or adhesive bonding, not limited to welding.

[0047] Example 5 Referring to Figures 6 and 7, the stainless steel main pipe 10 is formed integrally with the connecting pipe 30 by spinning, the first pipe segment 31 is connected to the stainless steel main pipe 10, and the second pipe segment 32 is connected to one end of the first pipe segment 31 away from the stainless steel main pipe 10 and extends in the opposite direction from the stainless steel main pipe 10. In this way, the spinning process for the stainless steel main pipe 10 is made easier, assembly with the branch pipe 20 becomes more convenient, and a larger working space can be secured in reinforcement processes such as welding when connecting with the branch pipe 20.

[0048] Preferably, the branch pipe 20 is inserted into the second pipe segment 32, and has an enlarged diameter segment 21 at one end of the branch pipe 20 adjacent to the second pipe segment 32, with the outer wall of the enlarged diameter segment 21 in contact with the inner wall of the second pipe segment 32. In this way, because the branch pipe 20 has an enlarged diameter segment 21 and the enlarged diameter segment 21 is located inside the second pipe segment 32, connection to the branch pipe 20 can be achieved even if the degree of spinning of the stainless steel main pipe 10 is small, thereby reducing the difficulty of the process.

[0049] Furthermore, it is preferable to use copper tubing for the branch pipe 20, as copper tubing has excellent toughness, is easy to expand or reduce in diameter, and has high durability. In other embodiments, aluminum alloy or copper-nickel alloy may be used for the branch pipe 20.

[0050] Compared with related technologies, this application provides a connection pipe 30 that connects and communicates the stainless steel main pipe 10 to the branch pipe 20 via the connection pipe 30. The connection pipe 30 allows the stainless steel main pipe 10 to fit closely to the branch pipe 20 without significantly reducing its size. The connection pipe 30 is formed by a tensioning process, resulting in a fast processing speed and low processing cost. The tension-formed connection pipe 30 has a smooth surface and gentle curves, which can reduce resistance to the flow of the medium. The connection pipe 30 is formed at one end of the stainless steel main pipe 10 by spinning. Since the connection pipe 30 is formed by the spinning of the stainless steel main pipe 10 itself, there is no need to add a separate structure, reducing material costs, simplifying assembly steps, and resulting in better fit between the connection pipe 30 and the stainless steel main pipe 10. An enlarged diameter segment 21 is provided at one end of the branch pipe 20, and the enlarged diameter segment 21 is connected to the connecting pipe 30. In this way, connection to the branch pipe 20 can be achieved without excessively increasing the degree of spinning of the stainless steel main pipe 10, thus solving the problem that the high hardness of stainless steel makes it difficult to significantly reduce its diameter.

[0051] Each of the technical features of the above embodiments can be combined in any way, and for the sake of brevity, not all possible combinations of each technical feature in the above embodiments have been described. However, as long as these combinations of technical features are inconsistent, they should all be considered to fall within the scope described herein.

[0052] The above embodiments are merely examples of some embodiments of the present application, and although the descriptions are relatively specific and detailed, they should not be understood as limiting the scope of the claims of the application. Those skilled in the art should note that several modifications and improvements can be made without departing from the spirit of the present application, and all of these fall within the scope of protection of this application. Therefore, the scope of protection of the patent of this application shall be in accordance with the attached claims.

Claims

1. Including stainless steel main pipes, branch pipes, and connecting pipes, The connecting pipe and the stainless steel main pipe are separate structures, one end of the connecting pipe is connected to the stainless steel main pipe, a connecting hole is formed at the other end of the connecting pipe, the diameter of the connecting hole is smaller than the inner diameter of the stainless steel main pipe, and the branch pipe is connected to the end of the connecting pipe where the connecting hole is formed, or A stainless steel gas collector assembly comprising a connecting pipe and a stainless steel main pipe, wherein the connecting pipe has a connecting hole, an enlarged diameter segment is provided at one end of the branch pipe, at least a portion of the enlarged diameter segment is located in the connecting hole, the diameter of the connecting hole is smaller than the inner diameter of the stainless steel main pipe, and the branch pipe is connected to the connecting pipe via the enlarged diameter segment.

2. The connecting pipe includes a first pipe segment and a second pipe segment, the first pipe segment being connected to the stainless steel main pipe, the second pipe segment being connected to one end of the first pipe segment, and the second pipe segment being connected to the branch pipe. The stainless steel gas collector assembly according to claim 1, wherein the connection hole is formed in the second pipe segment.

3. When the connecting pipe and the stainless steel main pipe are separate structures, the first pipe segment is fitted to the outer wall of the stainless steel main pipe, or the first pipe segment is inserted into the stainless steel main pipe. The stainless steel gas collector assembly according to claim 2, wherein the first pipe segment is welded to the stainless steel main pipe.

4. The second pipe segment is located outside the first pipe segment and extends in a direction away from the stainless steel main pipe. The stainless steel gas collecting pipe assembly according to claim 3, wherein the branch pipe is fitted into the outer wall of the second pipe segment or inserted into the connection hole, and the second pipe segment is welded to the branch pipe.

5. The second pipe segment is located within the first pipe segment and extends in a direction adjacent to the stainless steel main pipe. The stainless steel gas collector assembly according to claim 3, wherein the branch pipe is inserted into the connection hole and the second pipe segment is welded to the branch pipe.

6. In the case where the connecting pipe and the stainless steel main pipe are separate structures, a flange is provided protruding from the outer peripheral wall of one end of the first pipe segment away from the second pipe segment, the first pipe segment is inserted into the stainless steel main pipe, the second pipe segment is located inside the stainless steel main pipe, the flange abuts against the end face of the stainless steel main pipe, and the flange and / or the first pipe segment are welded to the stainless steel main pipe, as per claim 2 of the stainless steel gas collecting pipe assembly.

7. The second pipe segment is located within the first pipe segment and extends in a direction toward the flange, or the second pipe segment is located outside the first pipe segment and extends in a direction toward away from the flange. The stainless steel gas collector assembly according to claim 6, wherein the branch pipe is inserted into the connection hole and the second pipe segment is welded to the branch pipe.

8. The stainless steel gas collector assembly according to claim 2, wherein the first pipe segment includes a main body and a transition section, the main body is connected to the transition section, and the transition section is located between the main body and the second pipe segment and is inclined toward the second pipe segment.

9. A limiting member is provided at one end of the branch pipe, and when the connecting pipe is connected to the branch pipe, the limiting member can form a limiting engagement with the connecting pipe. The stainless steel gas collector assembly according to claim 2, wherein the limiting member is provided as one of a diameter-reducing port, a positioning point, or a positioning ring.

10. The stainless steel gas collection pipe assembly according to claim 1, wherein when the connecting pipe and the stainless steel main pipe are integrally molded, the diameter of the connecting hole is defined as R2 and the diameter of the stainless steel main pipe is defined as R1, and R1 and R2 satisfy 0.6R1 ≤ R2 < R1.

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