Control valve

Abstract

The invention discloses a control valve which comprises a valve shell and a first valve seat. The first valve seat comprises a first component and a second component which are formed by stamping and / or stretching a metal material; the first component comprises a first base part, a first connecting part and a second connecting part, the first base part is of an annular structure, the first connecting part and the second connecting part are annular, and the first connecting part and the second connecting part extend in the direction away from the center of the valve shell from the inner edge part and the outer edge part of the first base part correspondingly; the second connecting part is fixedly connected with the valve shell; the second component is close to the center of the valve shell relative to the first component and comprises a second base part and a third connecting part, the second base part is of an annular structure, and the third connecting part is annular and extends from the outer edge of the second base part in the direction close to the center of the valve shell; and the second base part and the third connecting part form a first step part of which the step surface faces the valve cavity of the control valve. And through structural optimization, the machining cost and the material cost of the control valve can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of fluid control, and in particular to a control valve. Background Art

[0002] In the related technology, the ball valve includes a valve housing, a valve seat, a valve core ball, a valve stem and a connecting pipe. The valve seat is welded and fixed to the valve housing. A valve cavity is formed between the valve seat and the valve housing. The valve core ball is arranged in the valve cavity. Two connecting pipes are welded to the interfaces at both ends of the valve seat. The valve core ball is driven to rotate by rotating the valve stem to open or cut off the flow path between the two connecting pipes.

[0003] Among them, the valve seat of the ball valve is formed by turning a stainless steel rod or a hollow tube. This method has a high material cost. At the same time, due to the high hardness of stainless steel, the wear on the tool is greater, resulting in high processing costs. Summary of the invention

[0004] The purpose of the present application is to provide a control valve, which is beneficial to reducing the processing cost and material cost of the control valve through structural optimization.

[0005] In order to solve the above technical problems, the present application provides a control valve, including a valve housing and a first valve seat; the first valve seat includes a first component and a second component, the first component is formed by stamping and / or stretching of a metal material, and the second component is formed by stamping and / or stretching of a metal material; the second component is fixedly connected to the first component;

[0006] The first component includes a first base, a first connecting portion and a second connecting portion, the first base is an annular structure, the first connecting portion and the second connecting portion are both annular, the first connecting portion extends from the inner edge of the first base toward a direction away from the center of the valve housing, and the second connecting portion extends from the outer edge of the first base toward a direction away from the center of the valve housing; the second connecting portion is fixedly connected to the valve housing;

[0007] The second component is closer to the center of the valve housing relative to the first component, and the second component includes a second base and a third connecting portion. The second base is an annular structure, and the third connecting portion is annular. The third connecting portion extends from the outer edge of the second base toward the center of the valve housing, and the second base and the third connecting portion constitute a first step portion with a step surface facing the valve cavity of the control valve.

[0008] The control valve provided in the present application has a first valve seat that can be formed by stamping and / or stretching of metal materials. Compared with the background technology, the first valve seat has a simple structure and is easy to process, which is conducive to reducing material costs and processing costs.

[0009] In the control valve as described above, the second base is fixedly connected to the first base, and the second base is in surface contact with the first base.

[0010] In the control valve as described above, the third connection portion is coaxially arranged with the second connection portion, and the outer diameter of the third connection portion is smaller than the outer diameter of the second connection portion.

[0011] The control valve as described above further includes a valve core and a first sealing gasket, wherein the valve core is located in the valve cavity of the control valve, the first sealing gasket is disposed on the first step portion, and the first sealing gasket supports the valve core.

[0012] In the control valve as described above, the first connecting portion and the second connecting portion are coaxially arranged, and the inner diameter of the first connecting portion is smaller than the outer diameter of the second connecting portion.

[0013] The control valve as described above further includes a first connecting pipe, wherein the first connecting pipe includes a first connecting section, the first connecting section is inserted into the first connecting portion, and the first connecting section is fixedly connected to the first connecting portion.

[0014] In the control valve as described above, the valve housing, the first valve seat and the first connecting pipe are all made of stainless steel, the first connecting portion is fixed to the first connecting pipe by welding, and the second connecting portion is fixed to the valve housing by welding.

[0015] In the control valve as described above, the valve housing is formed by stamping and / or stretching of metal material, and the valve housing includes a main body portion, which is cylindrical, at least part of the second connecting portion is located inside the main body portion, and the outer peripheral wall of the second connecting portion is fixedly connected to the inner wall of the main body portion.

[0016] The control valve as described above further comprises a second valve seat and a second connecting pipe; the second valve seat comprises a third component, and the third component is formed by stamping and / or stretching of a metal material;

[0017] The third component includes a third base, a fourth connecting part and a fifth connecting part. The third base is an annular structure, and the fourth connecting part and the fifth connecting part are both annular. The fourth connecting part extends from the inner edge of the third base toward the second connecting part, and the fifth connecting part extends from the outer edge of the third base toward the second connecting part; the fourth connecting part is fixedly connected to the second connecting part, and the fifth connecting part is fixedly connected to the valve housing.

[0018] The control valve as described above, the second valve seat further comprises a fourth component, the fourth component is fixedly connected to the third component, the fourth component is relatively far away from the second connecting pipe relative to the third component, and the fourth component is formed by stamping and / or stretching of metal materials; the fourth component comprises a fourth base and a sixth connecting portion, the fourth base is an annular structure, the sixth connecting portion is annular, the sixth connecting portion extends from the outer edge of the fourth base toward the center of the valve housing, and the fourth base and the sixth connecting portion constitute the second step portion of the valve cavity of the control valve with a step surface facing the control valve;

[0019] The control valve further includes a second sealing gasket, which is disposed on the second step portion and supports the valve core of the control valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A cross-sectional schematic diagram of a control valve provided in one embodiment of the present application;

[0021] Figure 2 for Figure 1 A partial enlarged view of the middle A area;

[0022] Figure 3 for Figure 1 A schematic diagram of the structure of the first valve seat;

[0023] Figure 4 for Figure 3 A cross-sectional schematic diagram of the first valve seat shown;

[0024] Figure 5 for Figure 1 A schematic diagram of the structure of the second valve seat;

[0025] Figure 6 for Figure 5 A schematic cross-sectional view of the second valve seat is shown.

[0026] Description of reference numerals:

[0027] Valve housing 1, body portion 11, protruding portion 12;

[0028] The first valve seat 2, the first member 21, the first base portion 211, the first connecting portion 212, the second connecting portion 213, the second member 22, the second base portion 221, the third connecting portion 222, and the first step portion 223;

[0029] The second valve seat 2', the third member 21', the third base portion 211', the fourth connecting portion 212', the fifth connecting portion 213', the fourth member 22', the fourth base portion 221', the sixth connecting portion 222', and the second step portion 223';

[0030] First connecting pipe 3, first connecting section 31; second connecting pipe 3', second connecting section 31';

[0031] A first sealing gasket 4, a second sealing gasket 4', and a valve core 5;

[0032] Valve head 6, valve stem 7. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0034] The directional words up, down, left and right involved in this article are based on Figure 1 The positions of the components in the figure and their relative positions are defined only for the clarity and convenience of expressing the technical solution. The terms “first”, “second”, etc. mentioned in this article are only used to distinguish the components with the same or similar structures or functions, and do not indicate that there is a sequence or a primary-secondary relationship between these components.

[0035] Please refer to Figure 1 and Figure 2 , Figure 1 A cross-sectional schematic diagram of a control valve provided in one embodiment of the present application; Figure 2 for Figure 1 A partial enlarged view of area A in the middle.

[0036] In this embodiment, the control valve includes a valve housing 1 and a first valve seat 2 . The valve housing 1 and the first valve seat 2 are fixedly connected. The first valve seat 2 may also be connected to a first connecting pipe 3 .

[0037] The first valve seat 2 includes a first component 21 . The first component 21 is formed by stamping and / or stretching of a metal material. The first valve seat 2 is fixedly connected to the valve housing 1 and the first connecting pipe 3 through the first component 21 .

[0038] Please refer to Figure 3 and Figure 4 , Figure 3 for Figure 1 A schematic diagram of the structure of the first valve seat; Figure 4 for Figure 3 A schematic cross-sectional view of the first valve seat is shown.

[0039] The first component 21 includes a first base portion 211, a first connecting portion 212 and a second connecting portion 213. The first base portion 211 is annular in structure, and the first connecting portion 212 and the second connecting portion 213 are both annular, wherein the first connecting portion 212 extends from the inner edge of the first base portion 211 toward the side where the first connecting pipe 3 is located, that is, the first connecting portion 212 extends from the inner edge of the first base portion 211 in a direction away from the center of the valve housing 1, and the second connecting portion 213 extends from the outer edge of the first base portion 211 toward the side where the first connecting pipe 3 is located, that is, the second connecting portion 213 extends from the outer edge of the first base portion 211 in a direction away from the center of the valve housing 1, that is, the first connecting portion 212 and the second connecting portion 213 are located on the same side of the first base portion 211; the cross-section of the first component 21 is roughly U-shaped, and each part of the first component 21 can be a thin-walled part, which is convenient for stamping and / or stretching processing of metal materials.

[0040] In practical applications, the first connection part 212 and the second connection part 213 are coaxially arranged, that is, the central axis of the first connection part 212 coincides with the central axis of the second connection part 213 ; the inner diameter of the first connection part 212 is smaller than the outer diameter of the second connection part 213 .

[0041] The first valve seat 2 may be fixedly connected to the first connecting pipe 3 via the first connecting portion 212 , and the first valve seat 2 may be fixedly connected to the valve housing 1 via the second connecting portion 213 .

[0042] In specific implementation, a first connecting section 31 is provided at one end of the first connecting pipe 3 close to the valve housing 1, the first connecting section 31 is inserted into the first connecting portion 212, and the outer peripheral wall of the first connecting section 31 is fixedly connected to the inner peripheral wall of the first connecting portion 212; at least part of the second connecting portion 213 is located in the valve housing 1, and the outer peripheral wall of the second connecting portion 213 is fixedly connected to the inner peripheral wall of the valve housing 1.

[0043] In other embodiments, the first connecting section 31 of the first connecting pipe 3 may also be externally mounted on the first connecting portion 212 .

[0044] In this embodiment, the first valve seat 2 may also include a second component 22, the first component 21 and the second component 22 are fixedly connected, the second component 22 is farther away from the first connecting pipe 3 relative to the first component 21, that is, the second component 22 is closer to the center of the valve housing 1 relative to the first component 21, and the second component 22 has a first step portion 223 with the step surface facing the valve cavity of the control valve, so as to facilitate supporting the valve core 5 of the control valve.

[0045] The second component 22 is also formed by stamping and / or stretching of metal materials. Specifically, the second component 22 includes a second base 221 and a third connecting portion 222. The second base 221 is an annular structure, and the third connecting portion 222 is annular. The third connecting portion 222 extends from the outer edge of the second base 221 toward the center of the valve housing 1. The second base 221 and the third connecting portion 222 constitute the aforementioned first step portion 223.

[0046] Combination Figures 1 to 4 The cross section of the second component 22 is roughly L-shaped, and each part of the second component 22 can also be a thin-walled part to facilitate stamping and / or stretching processing of metal materials.

[0047] In actual settings, the fixation of the second component 22 to the first component 21 can be achieved by fixedly connecting the second base 221 to the first base 211. Specifically, the first base 211 and the second base 221 can be in surface contact, that is, the first base 211 and the second base 221 are at least partially fitted to ensure the contact area between the two, which is beneficial to improve the connection strength and stability of the first component 21 and the second component 22.

[0048] The first component 21 and the second component 22 can be made of metal plates by stamping and / or stretching.

[0049] Compared with the valve seat in the background art, the first valve seat 2 of the control valve provided in this embodiment has a simple structure, which is conducive to improving the utilization rate of processing materials, and does not require machining, so the processing cost can be reduced. On the other hand, compared with the valve seat in the background art that is formed by machining a hollow tube, the first valve seat 2 of this embodiment solves the problem of material through-hole leakage, which can improve product reliability.

[0050] In specific implementation, the third connection part 222 of the second component 22 is coaxially arranged with the second connection part 213 of the first component 21, that is, the central axis of the third connection part 222 coincides with the central axis of the second connection part 213. On the basis that the second connection part 213 of the first component 21 is coaxial with the first connection part 212, the third connection part 222 is also coaxial with the first connection part 212. This is conducive to making the overall structure of the control valve more compact.

[0051] The outer diameter of the third connecting portion 222 is smaller than that of the second connecting portion 213 . After assembly, at least part of the first component 21 is located in the valve housing 1 , and the second component 22 is located in the valve housing 1 relative to the first component 21 , so as to cooperate with the valve core 5 in the valve housing 1 .

[0052] In this embodiment, the valve core 5 of the control valve is substantially spherical and is located in the valve cavity of the control valve. The control valve further comprises a first sealing gasket 4 which is disposed on the first step portion 223 of the second component 22 and abuts against the valve core 5 to support the valve core 5 .

[0053] The second component 22 of the first valve seat 2 has a simple structure and can support the valve core 5 .

[0054] In this embodiment, the valve housing 1 can also be formed by stamping and / or stretching of metal materials. The valve housing 1 includes a main body 11, which is cylindrical. As shown in the figure, the main body 11 has an opening in the left and right directions. The first valve seat 2 is arranged at the right end opening of the main body 11. The main body 11 is sleeved on the second connecting portion 213 of the first valve seat 2. The main body 11 and the second connecting portion 213 are also coaxially arranged, and the inner wall of the main body 11 is fixedly connected to the outer wall of the second connecting portion 213.

[0055] The valve housing 1 further includes a protrusion 12 . The protrusion 12 is annular and protrudes upward from the upper peripheral wall of the body 11 . The protrusion 12 has a through hole communicating with the inner cavity of the body 11 .

[0056] The control valve also includes a valve head 6 and a valve stem 7, wherein the valve head 6 is fixed in the through hole of the protrusion 12, the valve head 6 also has a through hole, the valve stem 7 is passed through the through hole of the valve head 6, the lower section of the valve stem 7 extends into the valve cavity of the control valve, and is connected to the keyway of the valve core 5, so that the valve core 5 can be driven to rotate through the valve stem 7 to open and close the control valve or adjust the flow of the control valve.

[0057] In specific implementation, the valve housing 1 can also be made of metal sheet by stamping and / or stretching, which is easy to process and has a relatively high material utilization rate.

[0058] In specific implementation, the valve housing 1, the first valve seat 2 and the first connecting pipe 3 can all be made of stainless steel plates, which is conducive to ensuring the strength of each component. The fixed connection between the relevant components can be welded. For example, the first component 21 and the second component 22 of the first valve seat 2 can be fixed together by laser welding, the first connecting portion 212 of the first valve seat 2 and the first connecting section 31 of the first connecting pipe 3 can be fixed by furnace welding, and the second connecting portion 213 of the first valve seat 2 and the main body 11 of the valve housing 1 can be fixed by laser welding.

[0059] In other embodiments, the main body 11 of the valve housing 1 and the second connecting portion 213 of the first valve seat 2 may also be fixed in a threaded connection manner.

[0060] Please refer to Figure 5 and Figure 6 , Figure 5 for Figure 1 A schematic diagram of the structure of the second valve seat; Figure 6 for Figure 5 A schematic cross-sectional view of the second valve seat is shown.

[0061] In this embodiment, the control valve further comprises a second valve seat 2', a second connecting pipe 3' and a second sealing gasket 4'. The second valve seat 2' is fixedly connected to the left end of the body 11 of the valve housing 1, and a valve cavity of the control valve is formed between the valve housing 1, the first valve seat 2 and the second valve seat 2'.

[0062] In order to further reduce the material cost and processing cost of the control valve, the second valve seat 2 ′ may adopt the same structure as the first valve seat 2 .

[0063] by Figure 1 In the shown orientation, the central axes of the main body 11, the first valve seat 2 and the second valve seat 2' extend in the left-right direction, the central axis of the protrusion 12 of the valve housing 1 extends in the up-down direction, and the second valve seat 2' and the first valve seat 2 are symmetrically arranged relative to the central axis of the protrusion 12.

[0064] The second valve seat 2' includes a third component 21', which is formed by stamping and / or stretching of metal materials. Metal plates can be selected, which are easy to manufacture and save costs. Specifically, stainless steel plates can be selected to ensure strength. The third component 21' includes a third base 211', a fourth connecting portion 212' and a fifth connecting portion 213'. The third base 211' is an annular structure. The fourth connecting portion 212' and the fifth connecting portion 213' are both annular. The fourth connecting portion 212' extends from the inner edge of the third base 211' toward the second connecting pipe 3', and the fifth connecting portion 213' extends from the outer edge of the third base 211' toward the second connecting pipe 3'; the fourth connecting portion 212' is fixedly connected to the second connecting pipe 3', and the fifth connecting portion 213' is fixedly connected to the valve housing 1.

[0065] In specific implementation, the second connecting pipe 3' includes a second connecting section 31', which is inserted into the fourth connecting portion 212' and fixed to the second connecting section 31' by welding. In other embodiments, the second connecting section 31' can also be externally mounted on the fourth connecting portion 212'.

[0066] In a specific implementation, the body portion 11 of the valve housing 1 is sleeved on the fifth connecting portion 213 ′, and the body portion 11 and the fifth connecting portion 213 ′ can be fixed by welding or threaded connection.

[0067] The second valve seat 2' further includes a fourth component 22', which is fixedly connected to the third component 21'. The fourth component 22' is relatively far from the second connecting pipe 3' relative to the third component 21', that is, the fourth component 22' is relatively close to the center of the valve housing 1 relative to the third component 21'. The fourth component 22' is formed by stamping and / or stretching of metal materials, and a metal plate can be selected, which is convenient to manufacture and saves costs. Specifically, a stainless steel plate can be selected to ensure strength; the fourth component 22' includes a fourth base 221' and a sixth connecting portion 222', the fourth base 221' is annular in structure, the sixth connection portion 222' is annular, the sixth connection portion 222' extends from the outer edge of the fourth base 221' toward the center of the valve housing 1, and the fourth base 221' and the sixth connection portion 222' form a second step portion 223' with a step surface facing the valve cavity of the control valve; the fourth base 221' is fixedly connected to the third base 211', specifically, the third base 211' and the fourth base 221' are in surface contact and are fixed by welding, which can improve the connection strength.

[0068] The second sealing gasket 4 ′ is disposed on the second step portion 223 ′ of the fourth component 22 ′ and abuts against the valve core 5 to support the valve core 5 .

[0069] The second valve seat 2 ′ adopts the same structure as the first valve seat 2 , and also has the advantages of simple structure and convenient processing.

[0070] The above is a detailed introduction to a control valve provided by the present application. This article uses specific examples to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A control valve, characterized in that: It comprises a valve housing and a first valve seat; the first valve seat comprises a first component and a second component, the first component is formed by stamping and / or stretching of a metal material, the second component is formed by stamping and / or stretching of a metal material; the second component is fixedly connected to the first component; The first component includes a first base, a first connecting portion and a second connecting portion, the first base is an annular structure, the first connecting portion and the second connecting portion are both annular, the first connecting portion extends from the inner edge of the first base toward a direction away from the center of the valve housing, and the second connecting portion extends from the outer edge of the first base toward a direction away from the center of the valve housing; the second connecting portion is fixedly connected to the valve housing; The second component is closer to the center of the valve housing relative to the first component, and the second component includes a second base and a third connecting portion. The second base is an annular structure, and the third connecting portion is annular. The third connecting portion extends from the outer edge of the second base toward the center of the valve housing, and the second base and the third connecting portion constitute a first step portion with a step surface facing the valve cavity of the control valve.

2. The control valve according to claim 1, characterized in that: The second base is fixedly connected to the first base, and the second base is in surface contact with the first base.

3. The control valve according to claim 1, characterized in that: The third connection portion is coaxially arranged with the second connection portion, and an outer diameter of the third connection portion is smaller than an outer diameter of the second connection portion.

4. The control valve according to claim 1, characterized in that: It also includes a valve core and a first sealing gasket, wherein the valve core is located in the valve cavity of the control valve, the first sealing gasket is disposed on the first step portion, and the first sealing gasket supports the valve core.

5. The control valve according to claim 1, characterized in that: The first connecting portion and the second connecting portion are coaxially arranged, and the inner diameter of the first connecting portion is smaller than the outer diameter of the second connecting portion.

6. The control valve according to any one of claims 1 to 5, characterized in that: It also includes a first connecting pipe, which includes a first connecting section. The first connecting section is inserted into the first connecting portion, and the first connecting section is fixedly connected to the first connecting portion.

7. The control valve according to claim 6, characterized in that The valve housing, the first valve seat and the first connecting pipe are all made of stainless steel. The first connecting portion is fixed to the first connecting pipe by welding, and the second connecting portion is fixed to the valve housing by welding.

8. The control valve according to any one of claims 1 to 5, characterized in that: The valve housing is formed by stamping and / or stretching of metal materials, and includes a main body portion, which is cylindrical, at least part of the second connecting portion is located inside the main body portion, and the outer peripheral wall of the second connecting portion is fixedly connected to the inner wall of the main body portion.

9. The control valve according to any one of claims 1 to 5, characterized in that: It also includes a second valve seat and a second connecting pipe; the second valve seat includes a third component, and the third component is formed by stamping and / or stretching of a metal material; The third component includes a third base, a fourth connecting part and a fifth connecting part. The third base is an annular structure, and the fourth connecting part and the fifth connecting part are both annular. The fourth connecting part extends from the inner edge of the third base toward the second connecting part, and the fifth connecting part extends from the outer edge of the third base toward the second connecting part; the fourth connecting part is fixedly connected to the second connecting part, and the fifth connecting part is fixedly connected to the valve housing.

10. The control valve according to claim 9, characterized in that The second valve seat further comprises a fourth component, the fourth component is fixedly connected to the third component, the fourth component is relatively far from the second connecting pipe relative to the third component, and the fourth component is formed by stamping and / or stretching of metal materials; the fourth component comprises a fourth base and a sixth connecting portion, the fourth base is an annular structure, the sixth connecting portion is annular, the sixth connecting portion extends from the outer edge of the fourth base toward the center of the valve housing, and the fourth base and the sixth connecting portion constitute the second step portion of the valve cavity of the control valve with a step surface facing the control valve; The control valve further includes a second sealing gasket, which is disposed on the second step portion and supports the valve core of the control valve.

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