Multi-connection pipe pressure vessel

Abstract

A multi-connection pipe pressure vessel, comprising a housing (100), a cover (300), and at least two connection pipes (400), one end of the housing (100) being open, the cover (300) being provided to cover the opening and connected to the housing (100), the cover (300) including a planar portion (320) provided in a planar shape, the planar portion (320) being provided at one end of the cover (300) remote from the opening, the planar portion (320) being provided with mounting holes (321) corresponding to each of the connection pipes (400), one end of the connection pipes (400) passing through the mounting holes (321) and entering the housing (100), and where D is the inner diameter of the housing (100) and d1 is the maximum diameter of the planar portion (320), D and d1 satisfy the relationship d1≦D / 1.4.

Description

[Technical field]

[0001] Related Applications This application claims priority to a Chinese patent application filed on March 23, 2022, bearing application number 202220649458.X and entitled "Multi-connection pipe pressure vessel", the entire contents of which are incorporated herein by reference.

[0002] This application relates to the field of liquid storage, and in particular to multi-connection pipe pressure vessels. [Background technology]

[0003] Multi-connection pipe pressure vessel, such as gas-liquid separator, accumulator, etc., is an important component in the cooling system, and is usually installed between the evaporator and the compressor to store refrigerant and separate gas and liquid, ensure that the medium sucked into the compressor is gas phase medium, prevent the liquid phase medium from being sucked into the working chamber of the compressor to form liquid collision, and at the same time, filter out impurities.

[0004] The multi-connection pipe pressure vessel includes a housing, a cover and a connection pipe, one end of the housing away from the evaporator is an open structure, the cover is provided to cover the opening and connected to the housing, one end of the connection pipe penetrates the cover and enters the housing, and the other end of the connection pipe is connected to the compressor. The refrigerant medium flowing from the evaporator into the multi-connection pipe pressure vessel includes a gaseous refrigerant medium and a liquid refrigerant medium, the gaseous refrigerant medium is returned to the compressor through the connection pipe, and the liquid refrigerant medium is stored in the cover.

[0005] As shown in FIG. 1, the cover includes a first connecting portion 100a, a second connecting portion 200a, and a transition portion 300a, the first connecting portion 100a is connected to the housing, the second connecting portion 200a is connected to the connecting pipe, and the first connecting portion 100a is connected to the second connecting portion 200a by the transition portion 300a. The second connecting portion 200a for connecting two or more connecting pipes is generally a flat portion having a flat shape. In the related art, the flat portion has a large dimension and is close to the housing, that is, the transition portion has a cylindrical structure, so that the cover of this structure has low strength. Since the liquid refrigerant medium flowing to the cover directly collides with the flat portion, the flat portion is subjected to a perpendicular collision force, which causes a large impact on the flat portion and the entire cover, and the destructive force is strong, which is likely to cause deformation and damage to the cover. Summary of the Invention

[0006] According to various embodiments of the present application, a multi-connection pipe pressure vessel is provided.

[0007] The multi-connection pipe pressure vessel includes a housing, a cover, and at least two connection pipes, one end of the housing is open, and the cover is provided to cover the opening and connected to the housing; the cover includes a flat surface portion formed in a flat shape, the flat surface portion being provided at one end remote from the opening portion of the cover, mounting holes corresponding to the respective connecting pipes being drilled in the flat surface portion, one end of the connecting pipes being inserted into the housing through the mounting holes, If the inner diameter of the housing is D and the maximum diameter of the flat portion is d1, D and d1 satisfy the relationship d1≦D / 1.4.

[0008] In one embodiment, a flange is provided on a surface of the flat portion facing the housing, the flange is provided surrounding a corresponding mounting hole, and the flange is transitionally connected to a hole wall of the mounting hole by a fillet; If the diameter of the inner hole of the flange is d2 and the radius of the fillet is r, then d1, d2, and r satisfy the relationship d1 ≧ 2.1 (d2 + 2r).

[0009] In one embodiment, the cover further includes a connecting portion and a transition portion, the cover being connected to the housing by the connecting portion and the connecting portion being connected to the planar portion by the transition portion.

[0010] In one embodiment, the transition is an arcuate transition, with the center of the arcuate transition being located within the cover.

[0011] In one embodiment, a first rounded chamfer is provided between the transition portion and the planar portion.

[0012] In one embodiment, when the radius of the first chamfer is R1 and the thickness of the cover is δ, R1 and δ satisfy the relational expression R1≧δ.

[0013] In one embodiment, when the radius of the first chamfer is R1 and the inner radius of the transition portion is R2, R1 and R2 satisfy the relationship R2>R1.

[0014] In one embodiment, the central axis of the housing passes through the center of the transition section.

[0015] In one embodiment, the connection portion is fitted and fixedly connected to the outside of the housing, and a second rounded chamfer is provided between the transition portion and the connection portion.

[0016] In one embodiment, the connection portion is fixedly connected to and extends through the housing.

[0017] The details of one or more embodiments of the present application are set forth in the drawings and description that follow to make other features, objects and advantages of the present application more clearly and easily understood. [Brief description of the drawings]

[0018] To better describe and illustrate the embodiments and / or examples of the present application disclosed herein, reference may be made to one or more of the accompanying drawings, in which additional details or examples used to illustrate the drawings should not be construed as limiting the scope of the disclosed application, the currently described embodiments and / or examples, and the best mode currently understood for these applications.

[0019] [Figure 1] FIG. 1 is a schematic diagram of a three-dimensional structure of a cover in the related art. [Diagram 2] FIG. 2 is a structural schematic diagram of a multi-connection pipe pressure vessel provided by an embodiment of the present application. [Diagram 3] FIG. 2 is a structural schematic diagram of another multi-connection pipe pressure vessel provided by an embodiment of the present application. [Figure 4] FIG. 2 is a schematic diagram of a three-dimensional structure of one structure of a cover provided by an embodiment of the present application from one viewpoint. [Diagram 5] FIG. 2 is a schematic diagram of a three-dimensional structure of one structure of a cover provided according to an embodiment of the present application from another perspective. [Figure 6] FIG. 2 is a schematic diagram of a three-dimensional structure of another structure of a cover provided by an embodiment of the present application. [Figure 7] FIG. 13 is a relationship diagram of cover life-D / d1 provided by an embodiment of the present application.

[0020] 100a: first connection portion; 200a: second connection portion; 300a: transition portion; 100 housing, 200 fixing plate, 300 cover, 310 connection portion, 320 flat portion, 321 mounting hole, 330 transition portion, 340 flange, 341 inner hole, 350 first rounded chamfer, 360 second rounded chamfer, 400 connection pipe. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] In order to make the above objects, features and advantages of the present application clearer and easier to understand, the specific embodiments of the present application are described in detail below with reference to the drawings. In the following description, various specific details are described in order to make the present application easier to fully understand. However, the present application can be implemented in many other aspects different from those described herein, and those skilled in the art can make similar improvements without going against the content of the present application, so the present application is not limited by the specific examples disclosed below.

[0022] It should be explained that when an assembly is referred to as being "fixed" or "mounted" on another assembly, it may be directly fixed to the other assembly or there may be an intervening assembly present. When an assembly is referred to as being "connected" to another assembly, it may be directly connected to the other assembly or there may be an intervening assembly present at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for descriptive purposes only and do not represent the only embodiments.

[0023] Furthermore, the terms "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying a relative importance or implicitly designating the number of technical features depicted. Thus, a feature qualified with "first" or "second" may explicitly state or implicitly include at least one of that feature. In the description of this application, "plurality" means at least two, e.g., two, three, etc., unless explicitly and specifically limited.

[0024] In this application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first feature and the second feature are in direct contact with each other, or that the first feature and the second feature are in indirect contact with each other via an intermediate medium. Furthermore, a first feature being "above," "above," and "upper side" of a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply that the horizontal height of the first feature is higher than that of the second feature. A first feature being "below," "below," and "lower side" of a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply that the horizontal height of the first feature is lower than that of the second feature.

[0025] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used in this specification are for the purpose of describing specific examples only and are not intended to limit this application. The term "or" as used in this application includes one or more of any and all combinations of the associated listed items.

[0026] Hereinafter, the present application will be described taking a gas-liquid separator as an example, but those skilled in the art can understand that the present application may also be applied to other multi-connection pipe pressure vessels.

[0027] The gas-liquid separator is provided in a cooling system and is installed between an evaporator and a compressor to store and separate refrigerant into gas and liquid. Referring to Fig. 2 and Fig. 3, the gas-liquid separator includes a housing 100, a fixed plate 200, a cover 300, and at least two connecting pipes 400, one end of the housing 100 away from the evaporator is opened, the cover 300 is installed to cover the opening and connected to the housing 100, the fixed plate 200 is installed in the housing 100, one end of the connecting pipe 400 is fixed to the fixed plate 200, and the other end passes through the cover 300 and is connected to the compressor. A through hole is further drilled in the fixed plate 200, and among the refrigerant medium flowing from the evaporator to the gas-liquid separator, the gaseous refrigerant medium is returned to the compressor through the connecting pipe 400, and the liquid refrigerant medium flows down through the through hole and is stored in the housing 100.

[0028] As shown in Figures 2 to 6, the cover 300 includes a connection portion 310, a flat portion 320 and a transition portion 330, the connection portion 310 is connected to the housing 100, and since the housing 100 generally has a cylindrical structure, the connection portion 310 is generally an annular connection portion, and the connection portion 310 may be fitted to the outside of the housing 100 and fixedly connected thereto, for example, by welding or the like, or may be inserted into the inside of the housing 100 and fixedly connected thereto, for example, by welding or the like, the flat portion 320 is provided at one end of the cover 300 away from the opening, and is provided in a flat shape and connected to the connecting pipe 400, and is generally a circular plane, and the transition portion 330 connects the connection portion 310 and the flat portion 320.

[0029] In other embodiments, the housing 100 may be a hollow housing 100 of other shapes, in which case the connection portion 310 also has a shape that matches the shape of the opening of the housing 100, and the flat portion 320 may be a circular flat portion 320 or a flat portion 320 of other shapes, which can be selected according to actual needs.

[0030] A flat surface portion 320 is used at the connection portion with the connecting pipe 400, mainly when two or more connecting pipes 400 are to be connected. Mounting holes 321 corresponding to each connecting pipe 400 are drilled in the flat surface portion 320, and one end of the connecting pipe 400 passes through the mounting hole 321 and enters the housing 100 to be attached to the fixed plate 200. If the inner diameter of the housing 100 is D and the diameter of the circular flat surface portion 320 is d1, D and d1 satisfy the relationship d1≦D / 1.4.

[0031] If the planar portion 320 has another non-circular shape, then d1 is the maximum diameter of the planar portion 320.

[0032] In this embodiment, the size of the flat portion 320 is limited by limiting the ratio of the dimensions of the flat portion 320 and the housing 100, thereby improving the structure of the cover 300. Since d1≦D / 1.4, the distance of the transition portion 330 from the central axis of the housing 100 decreases along the axial direction of the housing 100 at least in the portion close to the flat portion 320, so that an inclined surface is formed at least at a position close to the flat portion 320. When the liquid refrigerant medium flows to the cover 300, a part of the liquid refrigerant medium flows to the flat portion 320, and the remaining part flows to the inclined surface. Since there is an included angle between the flow direction of the liquid refrigerant medium and the inclined surface, the impact force can be decomposed into a first force along the direction of the inclined surface and a second force perpendicular to the direction of the inclined surface, and the deformation and destruction of the inclined surface are mainly determined by the second force, so that due to the existence of the included angle, the second force is much smaller than the impact force, the impact on the cover 300 is weakened, the impact resistance and deformation resistance of the cover 300 are enhanced, the strength of the cover 300 is improved, and its service life is extended. Through multiple designs, adjustments and tests, it has been proven that when d1≦D / 1.4, the strength and impact resistance effect of the cover 300 are significantly improved.

[0033] In order to improve the stability of the connecting pipe 400 after installation, a flange 340 is provided on the surface of the flat portion 320 facing the housing 100, and an inner hole 341 is formed in the center of the flange 340. The flange 340 is provided to surround the corresponding mounting hole 321 and is transitionally connected to the hole wall of the mounting hole 321 by a fillet. After the connecting pipe 400 is inserted into the inner hole 341, it is fixedly connected to the flange 340 by, for example, welding, and the flange 340 and the hole wall of the mounting hole 321 are transitionally connected by a fillet. Therefore, when the gaseous refrigerant medium flows through the connecting pipe 400, the connecting pipe 400 is prevented from moving and swinging, and further, stress concentration occurs there and the connecting pipe 400 is prevented from breaking.

[0034] From the viewpoint of the strength of the cover 300, the smaller the diameter d1 of the flat portion 320, the better, but d1 must satisfy the installation of the connecting pipe 400. When the diameter of the inner hole 341 of the flange 340 is constant, the smaller d1 is, the closer the flange 340 and the edge of the flat portion 320 are, and the smaller the distance between the transition fillet between the flange 340 and the hole wall of the mounting hole 321 and the hole wall of the mounting hole 321 and the edge of the flat portion 320 is, the less smooth the transition between the flange 340 and the transition portion 330 becomes, which is likely to cause stress concentration there, which reduces the strength and makes it easy to break, so the design of the flat portion 320 must be of sufficient dimensions. Specifically, if the diameter of the inner hole 341 is d2 and the radius of the fillet is r, d1, d2 and r satisfy the relationship d1≧2.1(d2+2r) so as to leave sufficient transition space on both sides of the mounting hole 321.

[0035] In this embodiment, the transition portion 330 may be selected as an arc-shaped transition portion, and the center of the arc-shaped transition portion is located inside the cover 300. Because the arc-shaped transition portion is convex, the internal volume is larger and more cooling medium can be stored.

[0036] Of course, in other embodiments, the arcuate transition may be concave, in which case the center of the arcuate transition is located outside of the cover 300 .

[0037] Of course, in other embodiments, the transition portion 330 is not limited to being arcuate and may have other shapes, such as a taper.

[0038] In order to prevent stress concentration from occurring at the connection point between the transition portion 330 and the flat portion 320, a first round chamfer 350 is provided between the transition portion 330 and the flat portion 320, which allows a smooth transition between the transition portion 330 and the flat portion 320, further improving the strength of the entire cover 300. Both ends of the first round chamfer 350 are smoothly connected to both the transition portion 330 and the flat portion 320.

[0039] Let the radius of the first chamfer 350 be R1 and the thickness of the cover 300 be δ. If the radius of the first chamfer 350 is too small, the transition portion 330 and the flat portion 320 will be connected in a line on the inside, and the first chamfer 350 will fill the notch on the outside of the line connection point. Therefore, in order to ensure that the transition portion 330 and the flat portion 320 are connected smoothly on the inside, R1 and δ satisfy the relational expression R1≧δ. As a result, the transition portion 330 and the flat portion 320 are connected smoothly on the inside by the inner wall of the first chamfer 350, and connected smoothly on the outside by the outer wall of the first chamfer 350, so that the thickness and strength of the connection point are ensured.

[0040] If the inner diameter of the transition portion 330 is R2, then in order to make the axial length of the cover 300 as long as possible, reduce the bottom surface area of ​​the cover 300, and make the connection between the first round chamfer 350, the transition portion 330, and the flat portion 320 smoother and more stable, R1 and R2 satisfy the relationship R2>R1.

[0041] In order to improve the versatility of transition portion 330 and planar portion 320 and reduce the difficulty of manufacturing, transition portion 330 may be of a unified specification, i.e., the dimensions of transition portion 330 are fixed, and for example, the outer diameter of transition portion 330 may be designed to be approximately the same as the inner diameter at the opening of housing 100.

[0042] 2, 4 and 5, when connecting portion 310 is fitted to the outside of housing 100, the diameter of connecting portion 310 is larger than the diameter of the connecting end of transition portion 330 with connecting portion 310, so a second round chamfer 360 is provided between transition portion 330 and connecting portion 310, thereby smoothly connecting transition portion 330 and connecting portion 310 and preventing stress concentration there from affecting the strength of cover 300. Both ends of second round chamfer 360 smoothly transition and connect to transition portion 330 and connecting portion 310.

[0043] When the connecting portion 310 is inserted into the housing 100, as shown in Figs. 3 and 6, the diameter of the connecting portion 310 is the same as the diameter of the connecting end, in which case the connecting portion 310 and the connecting end are butt-connected.

[0044] An arc-shaped segment is formed in the axial cross section of the transition portion 330. When the dimensions of the connecting portion 310 and the flat portion 320 are constant, the larger the inner diameter of the arc-shaped segment, the longer and steeper the axial length of the arc-shaped segment will be, and the transition between the arc-shaped segment, the connecting portion 310, and the flat portion 320 will be less smooth, which will cause stress concentration at the transition point and affect the strength. When the same raw material is used, the longer the axial length of the arc-shaped segment, the larger the volume of the cover 300 will be, the thinner the wall thickness will be, and the weaker the strength will be. At the same time, the smaller the inner diameter of the arc-shaped segment, the gentler the arc-shaped segment will be, and the larger the included angle between the flow direction of the liquid refrigerant medium and the arc-shaped segment will be, so the stronger the second force will be, and the weaker the strength of the cover 300 will be. The gentler the arc-shaped segment, the shorter the axial length of the transition segment will be, and the smaller the volume of the cover 300 will be. In this embodiment, the central axis of the housing 100 may be selected to pass through the center of the transition portion 330, so that the smoothness of the arc segment and the length along the axial direction are both appropriate, and the strength of the cover 300 can reach an optimal value when balancing volume and thickness.

[0045] The results of the impact resistance test of the cover 300 in the present application are shown in Table 1, and the relationship between life and D / d1 obtained from the test results is shown in FIG.

[0046] [Table 1]

[0047] It is apparent from Table 1 and FIG. 7 that when D / d1≧1.4, that is, d1≦D / 1.4, the life of the cover 300 is significantly extended, that is, the strength and impact resistance effect of the cover 300 are significantly improved.

[0048] Each of the technical features of the above-mentioned embodiments may be combined in any combination. For the sake of brevity, not all possible combinations of each of the technical features in the above-mentioned embodiments have been described. However, as long as there is no contradiction in the combination of these technical features, all of them should be considered within the scope described in this specification.

[0049] The above examples merely show some embodiments of the present application, and although the description is relatively specific and detailed, it should not be understood as limiting the scope of the claims of the present application. It should be noted that those skilled in the art can make some modifications and improvements without departing from the spirit of the present application, all of which are within the scope of protection of the present application. Therefore, the scope of protection of the patent of the present application shall be subject to the scope of the attached claims.

Claims

1. The present invention includes a housing, a cover, and at least two connecting pipes, one end of the housing being open, the cover being provided to cover the opening and connected to the housing, the cover includes a flat surface portion formed in a flat shape, the flat surface portion being provided at one end of the cover remote from the opening portion, the flat surface portion being provided with mounting holes corresponding to the respective connecting pipes, one end of the connecting pipes passing through the mounting holes and entering the housing, The inner diameter of the housing is D, and the maximum diameter of the flat portion is d １ Then, D and d １ , d １ A multi-connection pipe pressure vessel satisfying the relationship D / 1.

4.

2. A flange is provided on a surface of the flat portion facing the housing, the flange is provided to surround the corresponding mounting hole, and is transitionally connected to a hole wall of the mounting hole by a fillet; The diameter of the inner hole of the flange is d ２ and the radius of the fillet is r, then d １ , d ２ and r is d １ ≧2.1(d ２ 2. The multi-connection pipe pressure vessel of claim 1, wherein the relationship of (a) is satisfied.

3. 2. The multi-connection pipe pressure vessel of claim 1, wherein the cover further comprises a connection portion and a transition portion, the cover being connected to the housing by the connection portion and the connection portion being connected to the planar portion by the transition portion.

4. 4. The multi-connection pipe pressure vessel of claim 3, wherein the transition is an arcuate transition, the center of the arcuate transition being located within the cover.

5. 5. The multi-connection pipe pressure vessel of claim 4, further comprising a first chamfer between said transition portion and said planar portion.

6. The radius of the first chamfer is R １ and the thickness of the cover is δ, １ and δ is R １ 6. The multi-connection pipe pressure vessel according to claim 5, wherein the relationship .gtoreq..delta. is satisfied.

7. The radius of the first chamfer is R １ and the inner diameter of the transition portion is R ２ Then, R １ and R ２ is R ２ >R １ 6. The multi-connection pipe pressure vessel according to claim 5, which satisfies the following relationship:

8. The multi-connection pipe pressure vessel of claim 5 , wherein a central axis of said housing passes through a center of said transition section.

9. 4. The multi-connection pipe pressure vessel of claim 3, wherein the connection portion is fitted and fixedly connected to the outside of the housing, and a second rounded chamfer is provided between the transition portion and the connection portion.

10. 4. The multi-connection pipe pressure vessel of claim 3, wherein the connections are threaded and fixedly connected within the housing.

Images