Ball valve

Abstract

The utility model relates to the technical field of valves, in particular to a ball valve. The ball valve comprises a valve body, a first end cover and a first connecting pipe, the first end cover comprises an end cover body and an inflating valve, the end cover body is arranged at one end of the valve body and connected with the valve body, and the first connecting pipe is connected with the valve body through the end cover body. A circulation channel communicated with the valve body and the first connecting pipe is formed in the end cover body, and the inflating valve is connected to the outer side wall of the end cover body and communicated with the circulation channel. According to the ball valve, the problem that an existing ball valve inflating valve is high in connecting cost is solved.

Description

Technical Field

[0001] This application relates to the field of valve technology, and in particular to a ball valve. Background Technology

[0002] Ball valves are commonly used in air conditioning systems. They consist of a valve body and a valve core. The valve core is rotatably mounted in the valve body. The ball valve controls the flow of refrigerant by rotating the valve core.

[0003] In related technologies, ball valves also include a connecting pipe and a valve stem. The connecting pipe is connected to the valve body, and the valve stem is welded to the connecting pipe and communicates with the flow channel inside the connecting pipe for charging refrigerant into the connecting pipe. However, because the connecting pipe wall is relatively thin, welding can easily cause deformation of the connecting pipe, thus increasing costs. Utility Model Content

[0004] Therefore, it is necessary to provide a ball valve to solve the problem of high valve valve connection cost in existing ball valves.

[0005] This application provides a ball valve, which includes a valve body, a first end cap, and a first connecting pipe. The first end cap includes an end cap body and a valve nozzle. The end cap body is disposed at one end of the valve body and connected to the valve body. The first connecting pipe is connected to the valve body through the end cap body. A flow channel communicating between the valve body and the first connecting pipe is opened in the end cap body. The valve nozzle is connected to the outer side wall of the end cap body and communicates with the flow channel.

[0006] In one embodiment, the valve stem and the end cap body are integrally formed.

[0007] In one embodiment, the first end cap further includes a mounting base connected to the outer side wall of the end cap body; wherein the mounting base is used to install the ball valve into an air conditioning system.

[0008] In one embodiment, the mounting base and the end cap body are integrally formed, or the mounting base is welded to the end cap body.

[0009] In one embodiment, the mounting base and the valve stem are arranged at a preset angle along the circumference of the end cover body, and the preset angle is configured to be multiple, and the size of the multiple preset angles is different.

[0010] In one embodiment, the mounting base is laser welded to the end cap body, and a welding groove is formed between the mounting base and the end cap body at the connection point.

[0011] In one embodiment, the mounting base has a mounting hole that extends axially and / or radially along the end cap body.

[0012] In one embodiment, the end cap body protrudes from one end near the first connecting pipe to form a first boss. The first boss has a first mounting hole communicating with the flow channel. The first connecting pipe is inserted into the first mounting hole and connected to the first boss. The wall thickness of the first connecting pipe is T, the height of the first boss is H, and H≥2T; and / or, the wall thickness of the first boss at the first mounting hole is t, and t≥0.6T; and / or, the depth of the first mounting hole is h, and h≥T.

[0013] In one embodiment, the end cap body has a second protrusion protruding from one end near the valve body, and the second protrusion is inserted into the valve body and connected to the valve body.

[0014] In one embodiment, the end cap body and the valve body are laser welded.

[0015] In one embodiment, the ball valve further includes a second end cap and a second connecting pipe. The second end cap is disposed at the end of the valve body away from the first end cap and is connected to the valve body. The second connecting pipe is connected to the valve body through the second end cap. The second end cap and the first end cap have different structures.

[0016] In one embodiment, the connection between the end cap body and the valve body is provided with a conical surface, the conical surface including a first conical surface disposed on the end cap body, and / or, the conical surface including a second conical surface disposed on the valve body.

[0017] In one embodiment, the conical section includes a first conical surface and a second conical surface, and the first conical surface and the second conical surface are arranged at an angle.

[0018] Compared with existing technologies, the ball valve provided in this application, by integrating a valve stem structure on the first end cover, avoids pipe deformation compared to the traditional structure where the valve stem is welded to the pipe, thereby reducing the defect rate that may occur during the welding of the valve stem and the pipe. At the same time, the wall thickness of the first end cover is typically greater than that of the pipe, ensuring the structural strength of the valve stem connection and improving the overall reliability of the ball valve. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A cross-sectional view of a ball valve according to an embodiment of this application;

[0021] Figure 2 A cross-sectional view of a first end cap according to an embodiment provided in this application;

[0022] Figure 3 This is a schematic diagram of the ball valve provided in Embodiment 1 of this application;

[0023] Figure 4 A side view of the ball valve according to Embodiment 1 of this application;

[0024] Figure 5 This is a schematic diagram of the structure of the first end cap of Embodiment 1 provided in this application;

[0025] Figure 6 This is a schematic diagram of the ball valve in Embodiment 2 provided in this application;

[0026] Figure 7 A side view of the ball valve according to Embodiment 2 provided in this application;

[0027] Figure 8 This is a schematic diagram of the structure of the first end cap of Embodiment 2 provided in this application;

[0028] Figure 9 for Figure 1 Enlarged view of point A in the middle.

[0029] The symbols in the diagram represent the following meanings:

[0030] 100. Ball valve; 10. Valve body; 20. First end cap; 21. End cap body; 2101. Flow passage; 2102. Assembly hole; 211. First boss; 212. Second boss; 22. Valve nozzle; 221. Valve core; 222. Valve cap; 23. Mounting seat; 2301. Mounting hole; 30. Second end cap; 40. First connecting pipe; 50. Second connecting pipe; 60. Seal; 70. Conical surface; 71. First conical surface; 72. Second conical surface. Detailed Implementation

[0031] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0032] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0033] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0036] Ball valves are commonly used in air conditioning systems. They consist of a valve body and a valve core. The valve core is rotatably mounted in the valve body. The ball valve controls the flow of refrigerant by rotating the valve core.

[0037] In related technologies, ball valves also include a connecting pipe and a valve stem. The connecting pipe is connected to the valve body, and the valve stem is welded to the connecting pipe and communicates with the flow channel inside the connecting pipe for charging refrigerant into the connecting pipe. However, because the connecting pipe wall is relatively thin, welding can easily cause deformation of the connecting pipe, thus increasing costs.

[0038] Please see Figures 1-9 To address the high cost of connecting valve nozzles in existing ball valves, this application provides a ball valve 100. The ball valve 100 includes a valve body 10, a first end cap 20, a first connecting pipe 40, a second end cap 30, and a second connecting pipe 50. The first end cap 20 includes an end cap body 21 and a valve nozzle 22. The end cap body 21 is located at one end of the valve body 10 and connected to it. The first connecting pipe 40 is connected to the valve body 10 through the end cap body 21. A flow channel 2101 is formed within the end cap body 21, connecting the valve body 10 and the first connecting pipe 40. The valve nozzle 22 is connected to the outer wall of the end cap body 21 and communicates with the flow channel 2101. The second end cap 30 is located at the end of the valve body 10 furthest from the first end cap 20 and is connected to it. The second connecting pipe 50 is connected to the valve body 10 through the second end cap 30.

[0039] Understandably, by integrating the valve stem 22 structure onto the first end cap 20, this application avoids valve stem deformation compared to the traditional structure where the valve stem 22 is welded to the connecting pipe, thereby reducing the defect rate that may occur when welding the valve stem 22 to the connecting pipe. Simultaneously, the wall thickness of the first end cap 20 is typically greater than the wall thickness of the connecting pipe, ensuring the structural strength of the valve stem 22 connection and improving the overall reliability of the ball valve 100.

[0040] Among them, the valve stem 22 and the end cap body 21 are integrally formed, which can effectively reduce the number of parts of the ball valve 100, thereby reducing the number of processing steps and improving processing efficiency.

[0041] Specifically, such as Figure 2 As shown, a valve core 221 is installed inside the valve stem 22, and a valve cap 222 is threaded onto the outer circumference of the valve stem 22. The valve core 221 is used for charging refrigerant, while the valve cap 222 serves a protective function, preventing external impurities from entering the valve stem 22. The structure and installation of the valve core 221 and valve cap 222 can be carried out in a conventional manner, and will not be elaborated here.

[0042] It should be noted that in this embodiment, the first end cap 20 can be directly formed from a profile blank through machining. Here, the profile blank can be an extrusion molding structure, and various related holes (such as flow channels 2101) are pre-drilled on the profile blank, so that when the first end cap 20 is formed by subsequent machining, there is no need to re-drill holes, which can greatly reduce the amount of machining and thus greatly improve the machining efficiency.

[0043] Furthermore, in one embodiment, the second end cap 30 and the first end cap 20 have different structures. Since the ball valve 100 in this embodiment is a combined design of valve body 10 and two end caps, only one end cap structure needs to be changed to meet different requirements. That is, the second end cap 30 can adopt a common end cap structure to reduce costs. The first end cap 20 can not only integrate the valve stem 22 structure, but can also be combined with other components capable of achieving different functions according to actual needs, further improving the material utilization rate of the profile blank. Of course, in other embodiments, the second end cap 30 may not be provided, and the second connecting pipe 50 may be directly connected to the valve body 10.

[0044] For example, such as Figures 2-8 As shown, the first end cap 20 also includes a mounting base 23, which is connected to the outer wall of the end cap body 21, and the mounting base 23 and the valve stem 22 are spaced apart circumferentially along the end cap body 21. The mounting base 23 is used to install the ball valve 100 into the air conditioning system. That is, in this embodiment, the first end cap 20 also integrates the mounting base 23, which facilitates the overall installation of the ball valve 100. At the same time, it avoids the adverse effects that welding the mounting base 23 to the valve body 10 might have on the valve body 10 in traditional structures, such as causing the valve body 10 to soften.

[0045] Furthermore, in one embodiment, the mounting base 23 and the valve stem 22 are set at a preset angle along the circumference of the end cover body 21. Multiple preset angles are configured, and the magnitudes of these angles are all different. Thus, by using different preset angles, the ball valve 100 can be installed at any angle, and the installation posture of the ball valve 100 can also be different, thereby meeting the needs of different customers for different installation orientations of the ball valve 100.

[0046] Specifically, such as Figure 5 and Figure 8 As shown, the mounting base 23 has a mounting hole 2301, which extends axially and / or radially along the end cover body 21. It is easy to see that the mounting base 23 connects to related structures in the air conditioning system through the mounting hole 2301. By providing mounting holes 2301 in different directions, the requirements of more diverse installation scenarios can be met.

[0047] The mounting base 23 can be integrally formed with the end cap body 21, or it can be welded to the end cap body 21.

[0048] When the mounting base 23 and the end cap body 21 are integrally formed, such as Figure 3 , Figure 4 and Figure 5As shown, by machining the mounting base 23 onto the profile blank, the material utilization rate of the profile blank can be further improved. At this time, to reduce costs, the preset included angle formed by the portion of the profile blank where the mounting base 23 and the valve stem 22 are formed can be kept the same. Of course, different types of profile blanks can also be used to adapt to different installation requirements.

[0049] When the mounting base 23 is welded to the end cap body 21, as Figure 6 , Figure 7 and Figure 8 As shown, adjusting the mounting base 23 is simpler. Therefore, before fixing the mounting base 23 to the end cover body 21, the preset angle between the mounting base 23 and the valve stem 22 can be adjusted according to actual needs along the circumference of the end cover body 21 to determine the installation posture of the ball valve 100 and meet different installation orientation requirements. Here, the mounting base 23 is preferably laser-welded to the end cover body 21. The heat-affected zone generated by laser welding is small, which can ensure the strength and reliability of the first end cover 20.

[0050] At the connection between the mounting base 23 and the end cap body 21, a welding groove (not shown) is formed in both the mounting base 23 and the end cap body 21. The welding groove provides space for the solder, improving the reliability of laser welding. Specifically, the welding groove can be formed in the following ways: for example, a conical surface is formed on the outer wall of the end cap body 21, and the welding groove is formed by the conical surface and the outer wall of the mounting base 23. Alternatively, a conical surface is formed on the outer wall of the mounting base 23, and the welding groove is formed by the conical surface and the outer wall of the end cap body 21. Alternatively, conical surfaces are formed on both the outer wall of the end cap body 21 and the outer wall of the mounting base 23, and the welding groove is formed by the combination of the two conical surfaces. This application preferably uses a conical surface on the outer wall of the mounting base 23 and the outer wall of the end cap body 21 to form the welding groove, thereby reducing the processing of the end cap body 21 and improving processing efficiency.

[0051] Furthermore, in one embodiment, the end cap body 21 and the valve body 10 are laser-welded. Similarly, compared to traditional argon arc welding, high-frequency welding, or flame brazing, laser welding has a higher energy density, a smaller heat-affected zone, and a faster welding speed, effectively reducing the heat impact and preventing the valve body 10 from softening due to high temperatures. Simultaneously, since a sealing element 60 for improving sealing is provided at the connection between the end cap body 21 and the valve body 10, laser welding can also prevent the sealing element 60 from deforming due to heat, thus ensuring the sealing reliability of the ball valve 100.

[0052] Specifically, such as Figure 9As shown, a conical surface 70 is provided at the connection between the end cap body 21 and the valve body 10. The conical surface 70 includes a first conical surface 71 disposed on the end cap body 21, and / or, the conical surface 70 includes a second conical surface 72 disposed on the valve body 10. That is, the conical surface 70 can be formed by surrounding the first conical surface 71 and the outer wall of the valve body 10, or by surrounding the second conical surface 72 and the outer wall of the end cap body 21, or by a combination of the first conical surface 71 and the second conical surface 72. The conical surface 70 ensures the strength of the laser welding between the end cap body 21 and the valve body 10. Since laser welding does not require welding rods, after welding, the groove structure formed by the conical surface 70 can be filled by the molten parts on the valve body 10 and the end cap body 21, so that the connection between the valve body 10 and the end cap body 21 forms a planar structure, which is more aesthetically pleasing.

[0053] Taking the conical section 70, which includes a first conical surface 71 and a second conical surface 72, as an example, the first conical surface 71 and the second conical surface 72 are set at an angle to further increase the effective welding area and improve welding performance.

[0054] Of course, in other embodiments, welding and fixing can also be performed by argon arc welding, high frequency welding or flame brazing. In this case, welding rods can be used for welding. After the welding rods melt, they will fill the conical part 70. After the welding rods solidify, they will protrude from the conical part 70 and accumulate around it.

[0055] To facilitate the connection of both ends of the end cap body 21 with the valve body 10 and the first connecting pipe 40, in one embodiment, a first boss 211 protrudes from the end of the end cap body 21 near the first connecting pipe 40. The first boss 211 has an assembly hole 2102 communicating with the flow channel 2101. The first connecting pipe 40 is inserted into the assembly hole 2102 and connected to the first boss 211. A second boss 212 protrudes from the end of the end cap body 21 near the valve body 10. The second boss 212 is inserted into the valve body 10 and connected to the valve body 10.

[0056] Understandably, the end cap body 21 can increase the contact area with the first connecting pipe 40 through the first boss 211, ensuring assembly concentricity and thus improving the reliability of the connection between the end cap body 21 and the first connecting pipe 40. Furthermore, the end cap body 21 can increase the contact area with the valve body 10 through the second boss 212, ensuring assembly concentricity and thus improving the reliability of the connection between the end cap body 21 and the valve body 10. This is beneficial for improving the subsequent welding effect of the end cap body 21.

[0057] The end cap body 21 and the first connecting pipe 40 can be connected by high-frequency welding to achieve rapid connection between the two.

[0058] In one embodiment, such as Figure 1As shown, the wall thickness of the first connecting pipe 40 is T, and the height of the first boss 211 is H, where H ≥ 2T. Thus, by increasing the height of the first boss 211, it is beneficial to weld the end cap body 21 to the first connecting pipe 40, while reducing the heat impact of welding on the valve stem 22, thereby ensuring the structural strength of the valve stem 22.

[0059] In one embodiment, such as Figure 1 As shown, the wall thickness of the first boss 211 at the assembly hole 2102 is t, and t≥0.6T. This ensures the wall thickness of the first boss 211 at the assembly hole 2102, improves the structural strength of the first boss 211, and thus ensures the welding strength, preventing the first boss 211 from softening and deforming during the welding process.

[0060] In one embodiment, such as Figure 1 As shown, the depth of the assembly hole 2102 is h, and h ≥ T. This ensures the contact area between the first connecting pipe 40 and the first boss 211, further improving welding strength and reliability.

[0061] In one embodiment, the valve body 10, the first end cap 20, and the second end cap 30 can all be made of aluminum alloy. Compared with traditional valve materials (such as brass), aluminum alloy is not only lighter but also cheaper, which can effectively reduce the cost of the ball valve 100. Furthermore, under the same weight, the aluminum ball valve 100 can have a larger wall thickness than the brass ball valve 100, thereby effectively improving the structural stability of the ball valve 100.

[0062] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0063] The embodiments described above are merely illustrative of several implementation methods of this application, and 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 those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A ball valve, characterized in that, It includes a valve body (10), a first end cap (20) and a first connecting pipe (40). The first end cap (20) includes an end cap body (21) and a valve stem (22). The end cap body (21) is located at one end of the valve body (10) and connected to the valve body (10). The first connecting pipe (40) is connected to the valve body (10) through the end cap body (21). The end cap body (21) has a flow channel (2101) that connects the valve body (10) and the first connecting pipe (40). The valve (22) is connected to the outer wall of the end cap body (21) and communicates with the flow channel (2101).

2. The ball valve according to claim 1, characterized in that, The valve stem (22) and the end cap body (21) are integrally formed.

3. The ball valve according to claim 1, characterized in that, The first end cap (20) also includes a mounting base (23), which is connected to the outer side wall of the end cap body (21); The mounting base (23) is used to install the ball valve into the air conditioning system.

4. The ball valve according to claim 3, characterized in that, The mounting base (23) and the end cap body (21) are integrally formed, or the mounting base (23) is welded to the end cap body (21).

5. The ball valve according to claim 4, characterized in that, The mounting base (23) and the valve stem (22) are arranged at a preset angle along the circumference of the end cover body (21). There are multiple preset angles, and the sizes of the multiple preset angles are different.

6. The ball valve according to claim 4, characterized in that, The mounting base (23) is laser welded to the end cap body (21), and a welding groove is formed between the mounting base (23) and the end cap body (21) at the connection between the mounting base (23) and the end cap body (21).

7. The ball valve according to claim 3, characterized in that, The mounting base (23) has a mounting hole (2301) that extends along the axial and / or radial direction of the end cap body (21).

8. The ball valve according to claim 1, characterized in that, The end cap body (21) near the first connecting pipe (40) has a first boss (211) protruding from one end. The first boss (211) has an assembly hole (2102) communicating with the flow channel (2101). The first connecting pipe (40) is inserted into the assembly hole (2102) and connected to the first boss (211). Wherein, the wall thickness of the first connecting pipe (40) is T, the height of the first boss (211) is H, and H≥2T; And / or, the wall thickness of the first boss (211) at the assembly hole (2102) is t, and t≥0.6T; And / or, the depth of the assembly hole (2102) is h, and h≥T.

9. The ball valve according to claim 1, characterized in that, The end cap body (21) near the valve body (10) has a second protrusion (212) that protrudes out and is connected to the valve body (10).

10. The ball valve according to claim 1, characterized in that, The end cap body (21) and the valve body (10) are laser welded.

11. The ball valve according to claim 1, characterized in that, The ball valve further includes a second end cap (30) and a second connecting pipe (50). The second end cap (30) is located at the end of the valve body (10) away from the first end cap (20) and is connected to the valve body (10). The second connecting pipe (50) is connected to the valve body (10) through the second end cap (30). The second end cap (30) and the first end cap (20) have different structures.

12. The ball valve according to claim 1, characterized in that, The connection between the end cap body (21) and the valve body (10) is provided with a conical surface (70), the conical surface (70) includes a first conical surface (71) disposed on the end cap body (21), and / or, the conical surface (70) includes a second conical surface (72) disposed on the valve body (10).

13. The ball valve according to claim 12, characterized in that, The conical section (70) includes a first conical surface (71) and a second conical surface (72), and the first conical surface (71) and the second conical surface (72) are arranged at an angle.

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