Connecting pipe

Abstract

A connecting pipe (100). The connecting pipe (100) comprises a first connecting pipe (10) and a second connecting pipe (20); a pipe orifice edge at one end of the first connecting pipe (10) is formed as a connecting surface (11); a communication hole (22) is formed in a pipe wall of the second connecting pipe (20); the second connecting pipe (20) is provided with a connection fitting surface (21) at a peripheral position of the communication hole (22), the shape of the connecting surface (11) being matched with that of the connection fitting surface (21); the connecting surface (11) is attached and welded to the connection fitting surface (21), so that the first connecting pipe (10) is connected and communicated with the second connecting pipe (20), the first connecting pipe (10) and the second connecting pipe (20) being made of the same material.

Description

Connecting pipes

[0001] Related applications

[0002] This application claims priority to Chinese patent application number 202321622901.5, filed on June 25, 2023, entitled “Connecting Pipe,” the entire text of which is incorporated herein by reference. Technical Field

[0003] The present application relates to the technical field of pipeline connection, and in particular to a connecting pipeline. Background Art

[0004] Connecting pipes are widely used in refrigeration equipment. In existing refrigeration equipment, connecting pipes typically have a flange formed on the wall of one pipe. The other pipe is inserted into the inner wall of the flange and secured by welding. The flange increases the weld area and improves weld strength. However, due to the pipe diameter, the flange may not be high enough. Consequently, when the other pipe is inserted into the inner wall of the flange and secured by welding, the weld area may be insufficient, resulting in insufficient weld strength.

[0005] Summary of the Invention

[0006] According to various embodiments of the present application, a connecting pipeline is provided.

[0007] A connecting pipe is used in refrigeration equipment, including a first connecting pipe and a second connecting pipe. The edge of the pipe mouth at one end of the first connecting pipe is formed as a connecting surface, a connecting hole is opened on the pipe wall of the second connecting pipe, and a connecting mating surface is provided at the outer position of the connecting hole. The shape of the connecting surface is adapted to the shape of the connecting mating surface, and the connecting surface can be adhered to and welded with the connecting mating surface to connect and communicate with the second connecting pipe; wherein the first connecting pipe and the second connecting pipe are made of the same material, and the connecting surface and the connecting mating surface are connected to each other to form an integrated structure.

[0008] In one embodiment, along the radial direction of the second connecting pipe, the communicating hole is formed from the outer wall surface of the second connecting pipe toward the inner cutout, and the shape of the connecting mating surface is a saddle shape.

[0009] In one embodiment, the inner wall of the first connecting pipe is flush with the hole wall of the communicating hole.

[0010] In one embodiment, a boss is formed on the second connecting pipe, and along the radial direction of the second connecting pipe, the boss is formed by an outward flange protrusion from the outer wall surface of the second connecting pipe, and the boss forms the connecting hole; wherein, an end surface of the boss away from the second connecting pipe is set as a connecting mating surface, and the connecting mating surface is an annular plane.

[0011] In one embodiment, along the radial direction of the second connecting pipe, the distance between the connecting surface and the outer wall of the second connecting pipe is set to D, and the wall thickness of the boss is set to E, wherein D≤5E.

[0012] In one embodiment, the outer diameter of the first connecting pipe is set to A, and the outer diameter of the second connecting pipe is set to B, wherein 0.4B≤A≤B.

[0013] In one embodiment, the central axis of the first connecting pipe and the central axis of the second connecting pipe form an angle C, wherein C≤90°.

[0014] In one embodiment, the number of the first connecting pipe is one; or the number of the first connecting pipe is multiple, and the multiple first connecting pipes are arranged at intervals along the axial direction of the second connecting pipe.

[0015] In one embodiment, the first connecting pipe and the second connecting pipe are both configured as stainless steel parts.

[0016] In one embodiment, a first connecting portion is formed at one end of the first connecting pipe away from the second connecting pipe, and second connecting portions are formed at both axial ends of the second connecting pipe; wherein the first connecting portion and / or the second connecting portion are used to connect and communicate with an external pipeline.

[0017] The details of one or more embodiments of the present application are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the present application will become apparent from the description, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to better describe and illustrate the embodiments and / or examples of the inventions disclosed herein, reference may be made to one or more of the accompanying drawings. The additional details or examples used to describe the accompanying drawings should not be considered to limit the scope of the disclosed inventions, the presently described embodiments and / or examples, and any of the best modes currently understood for these inventions.

[0019] FIG1 is a schematic structural diagram of a connecting pipeline provided in an embodiment of the present application.

[0020] FIG2 is a perspective view of a first connecting pipe provided in an embodiment of the present application.

[0021] FIG3 is a perspective view of a second connecting pipe provided in an embodiment of the present application.

[0022] FIG4 is a schematic structural diagram of a connecting pipeline provided in an embodiment of the present application.

[0023] FIG5 is a perspective view of a first connecting pipe provided in an embodiment of the present application.

[0024] FIG6 is a perspective view of a second connecting pipe provided in an embodiment of the present application.

[0025] FIG7 is a schematic structural diagram of a connecting pipeline provided in an embodiment of the present application.

[0026] Reference numerals: 100, connecting pipeline; 10, first connecting pipe; 11, connecting surface; 12, first connecting portion; 20, second connecting pipe; 21, connecting mating surface; 22, communicating hole; 23, boss; 24, second connecting portion. DETAILED DESCRIPTION

[0027] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0028] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0030] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] 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 to which this application belongs. 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 relevant listed items.

[0032] The connecting pipeline 100 for which protection is sought in this application is used in refrigeration equipment for conveying fluid.

[0033] Please refer to Figures 1 to 7. The connecting pipeline 100 provided in one embodiment of the present application includes a first connecting pipe 10 and a second connecting pipe 20. The edge of the pipe mouth at one end of the first connecting pipe 10 is formed as a connecting surface 11. A connecting hole 22 is opened on the pipe wall of the second connecting pipe 20, and the second connecting pipe 20 is provided with a connecting mating surface 21 at the outer position of the connecting hole 22. The shape of the connecting mating surface 21 is adapted to the shape of the connecting surface 11. The connecting surface 11 and the connecting mating surface 21 are attached and butt-welded to connect and communicate the first connecting pipe 10 and the second connecting pipe 20.

[0034] Among them, the first pipe 10 and the second pipe 20 are made of the same material, so self-melting welding can be used during welding, that is, the connecting surface 11 and the connecting mating surface 21 can melt at the same temperature, and the first pipe 10 and the second pipe 20 have the same performance, which facilitates the connecting surface 11 and the connecting mating surface 21 to melt each other and form an integrated structure, which is beneficial to improving the welding effect. Compared with the plug welding when the flange height is insufficient in the background technology, the surface-fitting butt welding has sufficient welding area, which is beneficial to ensure the connection strength between the first pipe 10 and the second pipe 20.

[0035] As shown in Figures 1 to 3, in one embodiment, a communication hole 22 is formed along the radial direction of the second connecting pipe 20, cut inward from the outer wall of the second connecting pipe 20. The connection mating surface 21 is generally saddle-shaped and provided on the outer wall of the second connecting pipe 20. The connection mating surface 21 is hollow, so that the connection mating surface 21 can be arranged around the communication hole 22. The shape of the connection surface 11 formed on the first connecting pipe 10 is adapted to the shape of the connection mating surface 21, so that the connection surface 11 and the connection mating surface 21 are closely aligned, which helps to ensure sufficient welding area between the connection surface 11 and the connection mating surface 21, thereby improving the connection strength.

[0036] In this embodiment, the inner wall of the first connecting pipe 10 is flush with the wall of the connecting hole 22, so that the flow path formed by the inner wall of the first connecting pipe 10 and the wall of the connecting hole 22 is smooth. In this way, when the fluid flows through the connecting hole 22, the resistance encountered is smaller, which facilitates the flow of fluid.

[0037] As shown in Figures 4 to 6, in one embodiment, a communication hole 22 is formed by a flanged protrusion from the outer wall of the second pipe 20 along the radial direction of the second pipe 20. Specifically, a boss 23 is formed on the second pipe 20. The boss 23 is generally hollow and annular, and protrudes from the outer wall of the second pipe 20 toward the first pipe 10. The boss 23 surrounds the communication hole 22. The end surface of the boss 23 away from the second pipe 20 is provided as a connecting mating surface 21. The connecting mating surface 21 is an annular plane. The connecting surface 11 is formed to match the connecting mating surface 21 and is also an annular plane. The connecting mating surface 21 is butted against the connecting surface 11 of the first pipe 10, and the welding area is the entire overlapping joint surface. Compared with the plug welding in the background art where the flange height is insufficient, this allows a sufficient welding area to be formed between the connecting surface 11 and the connecting mating surface 21, thereby ensuring welding strength.

[0038] The wall thickness of the boss 23 is equal to that of the first connecting pipe 10 , so that the weld between the boss 23 and the first connecting pipe 10 can be smoothly transitioned after welding, thereby avoiding stress concentration caused by sudden shape change at the weld.

[0039] As shown in Figures 4 and 6, in this embodiment, along the radial direction of the second connecting pipe 20, the distance between the connecting mating surface 21 and the outer wall of the second connecting pipe 20 is set to D, and the wall thickness of the boss 23 is set to E, wherein D and E satisfy D≤5E, so that the boss 23 can be integrally formed on the second connecting pipe 20 by stamping, thereby preventing the boss 23 from cracking during the processing process.

[0040] Preferably, when D and E satisfy D≤2E, it is helpful to reduce the difficulty of processing when the boss 23 is integrally formed on the second connecting pipe 20 and can meet the use requirements. D and E can be specifically set to D=E, D=2E, etc., without limitation.

[0041] As shown in FIG4 , in one embodiment, the outer diameter of the first connecting pipe 10 is set to A (excluding the flared portion), and the outer diameter of the second connecting pipe 20 is set to B (excluding the flared portion), and A and B satisfy A≥0.4B.

[0042] It should be noted that in traditional methods, the first pipe 10 is usually inserted into the inner wall of the boss 23 (flanged edge) to achieve welding and fixation of the first pipe 10 and the second pipe 20. However, under the condition that A and B meet A≥0.4B, if the boss 23 is integrally formed on the second pipe 20 by stamping, in order to ensure that the second pipe 20 does not crack during the processing of the boss 23, the height of the boss 23 is limited, and the welding area of ​​the first pipe 10 and the second pipe 20 is insufficient when the first pipe 10 and the second pipe 20 are welded by plug-in welding, which is not conducive to ensuring the connection strength of the first pipe 10 and the second pipe 20. In this case, using the method of butt welding the first pipe 10 and the second pipe 20 is conducive to increasing the welding area between the first pipe 10 and the second pipe 20, thereby ensuring the connection strength between the first pipe 10 and the second pipe 20.

[0043] Without being limited thereto, the technical solutions of the embodiments of Figures 1 to 3 can also meet the requirement of ensuring welding strength when A≥0.4B. It should be noted that the technical solutions of the above two embodiments can also be applied to application scenarios where the pipe diameter A<0.4B.

[0044] In another embodiment, the outer diameter of the first connecting pipe 10 is set to A, and the outer diameter of the second connecting pipe 20 is set to B. A and B satisfy A<B. At this time, the outer diameter of the first connecting pipe 10 is relatively small, which is conducive to reducing the difficulty of welding.

[0045] In another embodiment, the outer diameter A of the first connecting pipe 10 and the outer diameter B of the second connecting pipe 20 satisfy A=B, that is, the outer diameter of the first connecting pipe 10 is the same as the outer diameter of the second connecting pipe 20. In this case, the first connecting pipe 10 and the second connecting pipe 20 have good connection strength.

[0046] In one embodiment, the central axis of the first connecting pipe 10 and the central axis of the second connecting pipe 20 form an angle C, where C = 90°. That is, the first connecting pipe 10 is perpendicular to the second connecting pipe 20, which helps to reduce the difficulty of welding between the first connecting pipe 10 and the second connecting pipe 20.

[0047] It should be noted that when C=90°, if the connection mating surface 21 is provided on the end surface of the boss 23 , the central axis of the boss 23 is perpendicular to the central axis of the second connecting pipe 20 .

[0048] In another embodiment, the angle C formed by the central axis of the first connecting pipe 10 and the central axis of the second connecting pipe 20 satisfies C<90°. This makes the structure between the first connecting pipe 10 and the second connecting pipe 20 more compact, requires less space during installation, and facilitates installation of the connecting pipe 100. The value of C can be 20°, 40°, 45°, 60°, 80°, etc., and can be determined based on actual needs.

[0049] It should be noted that when C is less than 90°, if the connecting mating surface 21 is set on the end face of the boss 23, the angle between the central axis of the boss 23 and the central axis of the second connecting pipe 20 is also less than 90°, so that the first connecting pipe 10 can be connected to the connecting mating surface 21 on the boss 23 through the connecting surface 11.

[0050] Preferably, the included angle C formed by the central axis of the first connecting pipe 10 and the central axis of the second connecting pipe 20 is ≥15°, so as to avoid the included angle C between the first connecting pipe 10 and the second connecting pipe 20 being too small to cause processing difficulties.

[0051] In one embodiment, there is only one first connecting pipe 10 , and the first connecting pipe 10 and the second connecting pipe 20 are combined to form a three-way pipe structure. At this time, the fluid can enter from the first connecting pipe 10 and flow out from the two ends of the second connecting pipe 20 to divert the fluid.

[0052] As shown in FIG7 , in another embodiment, multiple first connecting pipes 10 are arranged at intervals along the axial direction of the second connecting pipe 20. In this case, the connecting pipe 100 can be used in a heat exchanger as an air collecting pipe, a water collecting pipe, or a spray pipe. The number of first connecting pipes 10 can be two, three, four, or five, etc., without limitation.

[0053] In one embodiment, the first connecting pipe 10 and the second connecting pipe 20 are both made of stainless steel. As will be appreciated, stainless steel has a relatively high strength. Using stainless steel to manufacture both the first connecting pipe 10 and the second connecting pipe 20 improves the overall strength of the connecting pipe 100. Furthermore, the relatively low cost of stainless steel helps reduce the production cost of the connecting pipe 100.

[0054] In this embodiment, the first connecting pipe 10 and the second connecting pipe 20 are connected by self-melting welding, that is, stainless steel pipes are self-melting welded to each other. Compared with the traditional welding method using molten penetration of brazing filler metal, the welding parts of the first connecting pipe 10 and the second connecting pipe 20 of this application are both made of stainless steel without any other materials, so that the welding parts have a better welding effect and ensure the connection strength of the first connecting pipe 10 and the second connecting pipe 20.

[0055] Not limited to this, in another embodiment, the first connecting pipe 10 and the second connecting pipe 20 can also be welded and fixed by adding wire welding. The adding wire material is the same as the material of the connecting pipe. For example, in this embodiment, the adding wire material is stainless steel, so that the stainless steel adding wire melts and connects the first connecting pipe 10 and the second connecting pipe 20 to ensure welding strength.

[0056] Of course, in other embodiments, the first connecting pipe 10 and the second connecting pipe 20 may both be copper pipes, or aluminum pipes, etc.

[0057] As shown in Figures 1 and 4, in one embodiment, a first connecting portion 12 is formed at one end of the first connecting pipe 10 away from the second connecting pipe 20, and second connecting portions 24 are formed at both axial ends of the second connecting pipe 20. The first connecting portion 12 and / or the second connecting portion 24 are used to connect and communicate with an external pipeline, so that the connecting pipeline 100 and the external pipeline can cooperate to transport fluid. The external pipeline can be configured as a stainless steel tube, a copper tube, or an aluminum tube. The external pipeline is welded to the first connecting portion 12 and / or the second connecting portion 24 to connect and communicate with the external connecting pipe 100.

[0058] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.

Claims

1. A connecting pipeline, used in refrigeration equipment, characterized in that: The invention comprises a first connecting pipe and a second connecting pipe, wherein the pipe opening edge of one end of the first connecting pipe is formed as a connecting surface, a connecting hole is formed on the pipe wall of the second connecting pipe, and a connecting matching surface is provided at the outer position of the connecting hole, the connecting surface is matched with the connecting matching surface, and the connecting surface is attached and welded to the connecting matching surface, so that the first connecting pipe is connected and connected with the second connecting pipe; The first connecting pipe and the second connecting pipe are made of the same material.

2. The connecting pipeline according to claim 1, wherein: Along the radial direction of the second connecting pipe, the communicating hole is formed from the outer wall surface of the second connecting pipe to the inner cutout, and the shape of the connecting mating surface is a saddle shape.

3. The connecting pipeline according to claim 2, wherein: The inner wall of the first connecting pipe is flush with the hole wall of the communicating hole.

4. The connecting pipeline according to claim 1, wherein: A boss is formed on the second connecting pipe, and along the radial direction of the second connecting pipe, the boss is formed by flanging outward from the outer wall surface of the second connecting pipe, and the boss forms the communicating hole; Wherein, an end surface of the boss away from the second connecting pipe is set as the connecting mating surface, and the connecting mating surface is an annular plane.

5. The connecting pipeline according to claim 4, wherein: Along the radial direction of the second connecting pipe, the distance between the connecting mating surface and the outer wall of the second connecting pipe is set to D, and the wall thickness of the boss is set to E, wherein D≤5E.

6. The connecting pipeline according to any one of claims 1 to 5, wherein: The outer diameter of the first connecting pipe is set to A, and the outer diameter of the second connecting pipe is set to B, wherein 0.4B≤A≤B.

7. The connecting pipeline according to claim 1, wherein: The central axis of the first connecting pipe and the central axis of the second connecting pipe form an angle C, wherein C≤90°.

8. The connecting pipeline according to claim 1, wherein: The number of the first connecting pipe is one; Or, the number of the first connecting pipes is multiple, and the multiple first connecting pipes are arranged along the second connecting pipe. Arranged at intervals in the axial direction.

9. The connecting pipeline according to claim 1, wherein: The first connecting pipe and the second connecting pipe are both configured as stainless steel parts.

10. The connecting pipeline according to claim 1, wherein: A first connecting portion is formed at one end of the first connecting pipe away from the second connecting pipe, and second connecting portions are formed at two axial ends of the second connecting pipe respectively; Wherein, the first connecting portion and / or the second connecting portion are used to connect and communicate with an external pipeline.

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