A control valve

Abstract

The application discloses a control valve, comprising a valve body component, a sleeve, a core iron component, a sealing element, a first elastic element, the valve body component comprising a valve port part and a stop part, the core iron component comprising a movable core iron component, at least part of the movable core iron component being located in the inner cavity of the sleeve, and the sealing element comprising an upper end face and a sealing surface; in the closed valve state, the movable core iron component abuts against the stop part, the sealing surface blocks the valve port part, and the upper end face is higher than the stop part. In the application, the stop part of the valve body component is designed, so that in the closed valve state, the upper end face of the sealing element is higher than the stop part, the radial dimension of the part of the sealing element above the stop part is not limited, and in the same size of the valve body component, the sealing surface of the sealing element can seal a larger size of the valve port part, and the increase of the size of the valve port part can realize the use of a smaller valve body structure to realize a larger flow coefficient of the control valve.

Description

Technical Field

[0001] This utility model relates to the field of valve technology for refrigeration systems, and specifically to a control valve. Background Technology

[0002] Figure 1 This is a cross-sectional schematic diagram of a control valve. The control valve includes a valve body 1', a core iron 2', a sealing plug 3', and a sleeve 4'. The core iron 2' includes a large-diameter portion 21', a small-diameter portion 22', and a limiting step 23'. The limiting step 23' is located between the large-diameter portion 21' and the small-diameter portion 22'. The large-diameter portion 21' is slidably fitted with the sleeve 4'. The sealing plug 3' is limited and disposed in the mounting hole of the small-diameter portion 22'. When the limiting step 23' abuts against the valve body 1', the sealing surface of the sealing plug 3' blocks the valve port 11' of the valve body 1'. In the control valve with the above structure, since the limiting step 23' is formed between the large diameter portion 21' and the small diameter portion 22', in order to ensure that the core iron 2' can be effectively stopped, the limiting step 23' needs to retain a sufficiently wide step surface. As a result, the width of the small diameter portion 22' is limited, which in turn limits the size of the sealing plug 3', and thus affects the size of the sealing surface of the sealing plug 3', thereby limiting the size of the valve port 11' and affecting the flow coefficient of the control valve. Utility Model Content

[0003] The purpose of this application is to provide a control valve, including a valve body component, a sleeve, a core iron component, a seal, and a first elastic element. The valve body component is fixedly connected to the sleeve. The valve body component includes a valve port and a stop portion. The core iron component includes a moving core iron component, at least a portion of which is located within the inner cavity of the sleeve. The moving core iron component includes a mounting cavity. At least a portion of the seal is located within the mounting cavity. The seal includes an upper end face and a sealing surface. The upper end face is located above the sealing surface. In the axial direction of the sleeve, one end of the first elastic element abuts against the upper end face, and the other end of the first elastic element abuts against the inner wall of the moving core iron component. When the control valve is in the closed state, the moving core iron component abuts against the stop portion, the sealing surface blocks the valve port, and in the axial direction of the sleeve, the upper end face is higher than the stop portion.

[0004] In this application, by designing the stop portion of the valve body component, the upper end face of the seal is higher than the stop portion when the control valve is closed. In this way, the radial dimension of the part of the seal above the stop portion is not limited. Thus, in valve body components of the same specification and size, the sealing surface of the seal can seal a larger valve port. The increase in the size of the valve port allows for the use of a smaller valve body structure to achieve a larger flow coefficient of the control valve. Attached Figure Description

[0005] Figure 1The diagram shown is a cross-sectional schematic of a control valve in the background art.

[0006] Figure 2 The figure shown is a cross-sectional schematic diagram of an example control valve provided in this application;

[0007] Figure 2A As shown Figure 2 An exploded schematic diagram of the control valve in the diagram;

[0008] Figure 3 As shown Figure 2 A schematic diagram at point A in the middle;

[0009] Figure 4A As shown Figure 2 A three-dimensional schematic diagram of the moving core iron components and seals;

[0010] Figure 4B As shown Figure 2 Explosion-proof diagram of the central moving core iron component, the first elastic element, and the sealing element;

[0011] Figure 4C As shown Figure 2 Cross-sectional schematic diagram of the central moving core iron component, the first elastic element, and the sealing element;

[0012] Figure 5A As shown Figure 2 A three-dimensional schematic diagram of the middle valve body;

[0013] Figure 5B As shown Figure 2 Schematic cross-sectional view of the middle valve body;

[0014] Figure 6 The figure shown is a cross-sectional schematic diagram of another example of a control valve provided in this application;

[0015] Figure 7A As shown Figure 6 A three-dimensional schematic diagram of the assembled moving core iron component, the first elastic element, and the seal element in one example;

[0016] Figure 7B As shown Figure 7A Cross-sectional schematic diagram of the central moving core iron component, the first elastic element, and the sealing element;

[0017] Figure 7C As shown Figure 6 A three-dimensional schematic diagram of the assembled moving core iron component, the first elastic element, and the seal, in another example;

[0018] Figure 7D As shown Figure 7C Cross-sectional schematic diagram of the central moving core iron component, the first elastic element, and the sealing element;

[0019] Figure 8 As shown Figure 6 A three-dimensional schematic diagram of the valve sleeve;

[0020] Figure 9 As shown Figure 6 A three-dimensional schematic diagram of the middle valve body;

[0021] Figure 9A As shown Figure 9 Schematic cross-sectional view of the middle valve body;

[0022] Figure 10 The diagram shown is a cross-sectional view of another example of a control valve provided in this application;

[0023] Figure 11 As shown Figure 10 A schematic diagram at point B in the middle.

[0024] In the picture:

[0025] 1-Valve body component, 101-Valve port, 102-Stop part, 106-Inlet end, 107-Outlet end, 11-Valve sleeve, 12-Valve seat, 13-Valve body, 121-Seat part, 122-First upper protrusion, 1221-Side hole, 1222-Third valve body flow channel, 123-Second upper protrusion, 1231-Second inner protrusion, 1232-Straight hole part, 131-Second hole part, 132-Second step part, 1321-Second step surface, 133-First hole part, 134-Third hole part, 135-First valve body flow channel, 136-Second valve body flow channel, 137-First step part, 1371-First step surface,

[0026] 2-Sleeve, 20-Inner cavity,

[0027] 3-Core iron component, 31-Moving core iron component, 310-Mounting cavity, 311-Moving core iron, 3111-Second end face, 3112-Extension portion, 3113-First section portion, 3114-Second section portion, 3115-First blind hole, 3116-Second blind hole, 3117-Connecting hole, 3118-Third section portion, 3119-Riveting portion, 312-End component, 3121-End piece, 3122-Connecting piece, 3123-Cylindrical portion, 3124-First inner protrusion, 313-Outer protrusion, 314-Balancing hole, 315-Limiting portion, 32-Stationary core iron, 321-First end face, 33-Connecting plate

[0028] 4-Seal, 41-Upper end face, 42-Sealing surface, 44-Small diameter section, 45-Large diameter section

[0029] 5-First elastic element,

[0030] 6-Second elastic element,

[0031] 7-Connector component, 71-First connector, 72-Second connector Detailed Implementation

[0032] The embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the scope of the present invention.

[0033] Figure 2 The figure shown is a cross-sectional schematic diagram of an example control valve provided in this application; Figure 2A As shown Figure 2 An exploded schematic diagram of the control valve in the diagram; Figure 3 As shown Figure 2 A schematic diagram at point A in the middle; Figure 4A As shown Figure 2 A three-dimensional schematic diagram of the moving core iron components and seals; Figure 4B As shown Figure 2 Explosion-proof diagram of the central moving core iron component, the first elastic element, and the sealing element; Figure 4C As shown Figure 2 Cross-sectional schematic diagram of the central moving core iron component, the first elastic element, and the sealing element; Figure 5A As shown Figure 2 A three-dimensional schematic diagram of the middle valve body; Figure 5B As shown Figure 2 A cross-sectional view of the valve body.

[0034] This application provides a control valve, including a valve body component 1, a sleeve 2, a core iron component 3, a seal 4, a first elastic element 5, and a connecting pipe component 7. The valve body component 1 is fixedly connected to the sleeve 2. The valve body component 1 includes a valve port portion 101 and a stop portion 102. The core iron component 3 includes a moving core iron component 31, at least a portion of which is located in the inner cavity 20 of the sleeve 2. The moving core iron component 31 includes a mounting cavity 310. At least a portion of the seal 4 is located in the mounting cavity 310. The outer wall of the seal 4... There is a radial gap between the moving core iron component 31 and the inner wall of the mounting cavity 310. The moving core iron component 31 includes an inwardly protruding limiting part 315. The sealing element 4 includes a large diameter section 45 and a small diameter section 44. The longitudinal section of the sealing element 4 is trapezoidal. The small diameter section 44 is located below the large diameter section 45. The large diameter section 45 can abut against the limiting part 315 in the axial direction of the sleeve 2. In this way, the limiting part 315 can limit the downward movement distance of the sealing element 4 and prevent the sealing element 4 from falling off the mounting cavity 310.

[0035] The valve body component 1 includes a first hole portion 133, a second hole portion 131, and a first step portion 137. The first step portion 137 is located between the first hole portion 133 and the second hole portion 131. The first step surface 1371 of the first step portion 137 faces upward. The sleeve 2 is located on the first step surface 1371. The minimum distance between the hole wall of the first hole portion 133 and the hole wall of the second hole portion 131 in the radial direction of the sleeve 2 is less than or equal to the wall thickness of the sleeve 2. This can prevent the valve body component 1 from contacting or interfering with the outer wall of the moving core iron component 31 in the radial direction of the sleeve 2, thereby ensuring the motion performance of the moving core iron component 31 when it moves axially.

[0036] The connecting pipe component 7 includes a first connecting pipe 71 and a second connecting pipe 72. The valve body component 1 includes an inlet end 106 and an outlet end 107. The outlet end 107 is located below the valve port 101. The first connecting pipe 71 is connected to the inlet end 106, and the second connecting pipe 72 is connected to the outlet end 107.

[0037] like Figure 2-5B As shown, in this embodiment, the sealing member 4 includes an upper end face 41 and a sealing surface 42. The upper end face 41 is located above the sealing surface 42. In the axial direction of the sleeve 2, one end of the first elastic member 5 abuts against the upper end face 41, and the other end of the first elastic member 5 abuts against the inner wall of the moving core iron member 31. When the control valve is in the closed state, the moving core iron member 31 abuts against the stop part 102, the sealing surface 42 blocks the valve port 101, and in the axial direction of the sleeve 2, the upper end face 41 is higher than the stop part 102. In this application, by designing the stop portion 102 of the valve body component 1, the upper end face 41 of the seal 4 is higher than the stop portion 102 when the control valve is in the closed state. In this way, the radial dimension of the part of the seal 4 above the stop portion 102 is not restricted. Thus, in valve body components 1 of the same specifications and dimensions, the sealing surface 42 of the seal 4 can seal a larger valve port portion 101. The increase in the size of the valve port portion 101 can achieve a larger flow coefficient of the control valve using a smaller valve body structure 1.

[0038] It should be noted that the moving core iron component 31 is in sliding fit with the sleeve 2, meaning that the size of the moving core iron component 31 determines the size of the sleeve 2 (and thus the size and specifications of the matching coil). Based on this, it should also be noted that in the control valves of the prior art, to ensure certain moving core iron component size requirements (in order to match the corresponding coil specifications), a certain sealing surface size must be ensured. Thus, the size of the corresponding valve port is limited. If it is necessary to increase the flow coefficient of the control valve, a larger specification coil and valve body component are required. However, the control valve of this application, with the same valve body component 1 specifications, can increase the flow coefficient and reduce the cost of the coil without requiring a larger specification coil (not shown in the figure) and sleeve 2.

[0039] like Figure 2As shown, the core iron component 3 also includes a stationary core iron 32, which is fixedly connected to the sleeve 2. The stationary core iron 32 is located above the moving core iron component 31. The stationary core iron 32 includes a first end face 321 facing the moving core iron component 31, and the moving core iron component 31 includes a second end face 3111 facing the stationary core iron 32. The minimum axial distance between the stop portion 102 and the first end face 321 in the sleeve 2 is defined as L1. When the control valve is in the closed state, the minimum axial distance between the valve port portion 101 and the second end face 3111 in the sleeve 2 is defined as L2. Therefore, L1 > L2. Thus, by designing the position of the stop portion 102, the influence of the stop portion 102 on the radial dimension of the seal 4 is reduced, thereby enabling the sealing surface 42 to adapt to the size of the valve port portion 101 and effectively seal the valve port portion 101.

[0040] like Figure 2-4C As shown, specifically, the moving core component 31 includes a moving core 311 and an end component 312. The end component 312 is at least partially located below the moving core 311, and is connected to the moving core 311. The end component 312 and the moving core 311 form a mounting cavity 310, and the end component 312 can abut against the stop portion 102. It should be noted that in the control valves of the prior art, the moving core component restricts the downward movement of the seal through an end plate. The moving core component is riveted to the end plate, and the size of the riveted part also affects the size of the sealing surface of the seal, which in turn affects the size of the valve port. Therefore, compared with the control valves of the prior art, the present application, by setting the end component 312, can reduce the restriction of the sealing surface 42 of the seal 4 on the size of the valve port 101, thereby meeting the design requirements for a larger valve port 101 and improving the flow coefficient of the control valve.

[0041] like Figure 3As shown, the moving core 311 includes a first section 3113 and a second section 3114. The first section 3113 is clearance-fitted with the inner wall of the sleeve 2. The second section 3114 is closer to the valve port 101 than the first section 3113. In the radial direction of the sleeve 2, the distance between the second section 3114 and the inner wall of the sleeve 2 is greater than the distance between the first section 3113 and the inner wall of the sleeve 2. The end member 312 includes a cylindrical section 3123. The cylindrical section 3123 is partially located in the inner cavity 20 and is located below the second section 3114. In the radial direction of the sleeve 2, the distance between the cylindrical section 3123 and the inner wall of the sleeve 2 is greater than the distance between the first section 3113 and the inner wall of the sleeve 2. The cylindrical section 3123 is welded and fixed to the second section 3114. Thus, since the cylindrical part 3123 and the second section 3114 are fixed by welding, the size settings of the second section 3114 and the cylindrical part 3123 can prevent the welded part after laser welding of the second section 3114 and the cylindrical part 3123 from contacting the inner wall of the sleeve 2, thereby avoiding interference between the moving core iron component 31 and the inner wall of the sleeve 2 and ensuring the motion performance of the moving core iron component 31.

[0042] like Figure 4C As shown, in this embodiment, the end member 312 includes the aforementioned cylindrical portion 3123 and a first inner protrusion 3124. The first inner protrusion 3124 protrudes radially inward from the cylindrical portion 3123 onto the sleeve 2, serving as the aforementioned limiting portion 315. The sealing member 4 includes the aforementioned large-diameter section 45 and the aforementioned small-diameter section 44. The large-diameter section 45 includes the aforementioned upper end face 41, and the small-diameter section 44 includes the aforementioned sealing surface 42. The inner wall of the cylindrical portion 3123 is in clearance fit with the outer wall of the large-diameter section of the sealing member 4, and the inner wall of the first inner protrusion 3124 is in clearance fit with the outer wall of the small-diameter section of the sealing member 4. In this way, the restriction of the radial dimension of the sealing member 4 by the first inner protrusion 3124 can be reduced, allowing the sealing surface 42 to be adapted to a larger valve port portion 101. This satisfies the design requirement of a larger valve port portion 101, enabling the control valve to achieve a larger flow coefficient using a smaller valve body structure 1.

[0043] Among them, the moving core iron 311 also includes a third section 3118, which is closer to the valve port 101 than the second section 3114. The outer diameter of the third section 3118 is smaller than the outer diameter of the second section 3114, and the cylindrical section 3123 is arranged around the third section 3118.

[0044] When the moving core iron component 31 is assembled with the seal 4, the seal 4 is inserted into the end component 312. The lower limit of the seal 4 is achieved by the first inner protrusion 3124. During the pressing process of the moving core iron 311 and the end component 312, the third section 3118 provides an installation guide for the cylindrical section 3123. After the moving core iron 311 and the end component 312 are pressed together, the cylindrical section 3123 and the second section 3114 are welded and fixed to achieve the connection and cooperation between the moving core iron component 31 and the seal 4.

[0045] like Figures 5A-5B As shown, valve body component 1 includes valve body 13, which includes a second hole 131, a second step 132, a third hole 134, a first valve body flow channel 135, and a second upper protrusion 123. The second upper protrusion 123 protrudes upward along the axial direction of sleeve 2 and is cylindrical. The second upper protrusion 123 includes a valve port 101 in the radial direction of sleeve 2. The third hole 134 is located outside the second upper protrusion 123. The second step 132 is located between the second hole 131 and the third hole 134 and includes the aforementioned stop 102. The second step surface 1321 of the second step 132 faces upward, and the first valve body flow channel 135 extends from the second step surface 1321 towards... The first valve body flow channel 135 is recessed and penetrates the wall of the third hole 134 radially through the sleeve 2. When the control valve is closed, one side of the first valve body flow channel 135 is connected to the chamber below the stop part 102, and the other side of the first valve body flow channel 135 is connected to the gap between the side wall of the end member 312 and the inner wall of the valve body 13. That is, with the plane perpendicular to the longitudinal direction of the control valve as the projection plane, the projection part of the first valve body flow channel 135 is located outside the projection of the outer wall of the end member 312. The cylindrical part 3123 includes a balance hole 314, which is at least partially located above the seal 4. The balance hole 314 penetrates the inner wall and outer wall of the cylindrical part 3123 radially through the sleeve 2. In this way, it can be ensured that the fluid flowing into the control valve is diverted when the control valve is closed, so that the fluid can flow. At the same time, after the high-pressure fluid enters the mounting cavity 310 through the balance hole 314, it will also put pressure on the seal 4 to improve the sealing reliability of the seal 4.

[0046] In this embodiment, there is at least one balance hole 314 and at least one first valve body flow channel 135. To ensure the fluid flow performance of the control valve in the closed state, there are two balance holes 314 and two first valve body flow channels 135.

[0047] The valve body 13 includes a second valve body flow channel 136, which is recessed outward from the wall of the second hole 131. The second valve body flow channel 136 and the first valve body flow channel 135 are located in the sleeve 2. This ensures the fluid flow performance of the control valve in the closed state.

[0048] like Figure 5B As shown, the second upper protrusion 123 includes an inwardly protruding second inner protrusion 1231 and a straight hole 1232. The second inner protrusion 1231 is located above the straight hole 1232, and a portion of the second inner protrusion 1231 serves as the aforementioned valve port 101. In this way, while ensuring the flow coefficient, the machining difficulty of the valve body 13 can be simplified. Specifically, when machining the valve body 13, it is not necessary to precisely machine the straight hole 1232; only the machining accuracy of the second inner protrusion 1231 needs to be ensured, making tolerance control easier.

[0049] like Figure 2 and 4C As shown, the control valve also includes a second elastic element 6. The outer wall of the moving core iron component 31 is clearance-fitted with the inner wall of the sleeve 2. The moving core iron component 31 includes a first blind hole 3115 and a second blind hole 3116. The first blind hole 3115 is located below the second blind hole 3116. Part of the first elastic element 5 is located in the first blind hole 3115, and the other end of the first elastic element 5 abuts against the top wall of the first blind hole 3115. The second elastic element 6 is at least partially located in the second blind hole 3116. One end of the second elastic element 6 abuts against the stationary core iron 32, and the other end of the second elastic element 6 abuts against the bottom wall of the second blind hole 3116. Thus, when the fluid flows between the chamber above and below the moving core iron component 31, the fluid is guided to flow between the outer wall of the moving core iron component 31 and the inner wall of the sleeve 2, thereby reducing the noise generated by the engagement of the moving core iron component 31 and the stationary core iron 32 when the control valve is opened.

[0050] Figure 6 The figure shown is a cross-sectional schematic diagram of another example of a control valve provided in this application; Figure 7A As shown Figure 6 A three-dimensional schematic diagram of the assembled moving core iron component, the first elastic element, and the seal element in one example; Figure 7B As shown Figure 7A Cross-sectional schematic diagram of the central moving core iron component, the first elastic element, and the sealing element; Figure 7C As shown Figure 6 A three-dimensional schematic diagram of the assembled moving core iron component, the first elastic element, and the seal, in another example; Figure 7D As shown Figure 7C Cross-sectional schematic diagram of the central moving core iron component, the first elastic element, and the sealing element; Figure 8 As shown Figure 6 A three-dimensional schematic diagram of the valve sleeve; Figure 9 As shown Figure 6 A three-dimensional schematic diagram of the middle valve body; Figure 9A As shown Figure 9 Schematic cross-sectional view of the middle valve body; Figure 10 The diagram shown is a cross-sectional view of another example of a control valve provided in this application; Figure 11 As shown Figure 10 A schematic diagram at point B in the middle.

[0051] like Figure 6-11 As shown, valve body component 1 includes valve sleeve 11 and valve seat 12. Valve sleeve 11 is fitted over valve seat 12 and valve sleeve 11 is fixedly connected to valve seat 12. Valve sleeve 11 includes the aforementioned inlet end 106. Valve seat 12 includes the aforementioned outlet end 107, the aforementioned valve port 101, and the aforementioned stop portion 102. Moving core component 31 includes the aforementioned moving core 311 and an outward protrusion 313. The outward protrusion 313 is located above valve seat 12 and protrudes outward in the radial direction of sleeve 2. The outward protrusion 313 can abut against the stop portion 102. Thus, since the valve seat 12 and the valve sleeve 11 are machined separately, it is convenient to assemble the valve seat 12 and the valve sleeve 11. At the same time, by setting the stop part 102 on the valve seat 12, the influence of the stop part 102 on the size of the moving core iron component 31 can be reduced, so that the radial dimension of the part of the seal 4 above the stop part 102 is not restricted. In this way, in the valve body component 1 of the same specification and size, the sealing surface 42 of the seal 4 can seal the larger valve port 101, thereby realizing the use of a smaller valve body structure 1 to achieve a larger flow coefficient of the control valve.

[0052] Meanwhile, when assembling the moving core iron component 31 with the valve body component 1, the moving core iron component 31 is inserted into the valve sleeve 11 from bottom to top, and then partially inserted into the valve sleeve 11 through the valve seat 12. The valve seat 12 and the valve sleeve 11 are then welded and fixed. Since the stop part 102 is located on the valve seat 12, during the installation of the moving core iron component 31, the outward protrusion 313 will not interfere with the inner wall of the valve sleeve 11 in the axial direction of the sleeve 2, ensuring installation efficiency.

[0053] like Figure 9-9AAs shown, the valve seat 12 includes a seat body portion 121, a first upper protrusion 122, and a second upper protrusion 123. The first upper protrusion 122 protrudes upward from the seat body portion 121, and the second upper protrusion 123 protrudes upward from the seat body portion 121. The first upper protrusion 122 is located outside the second upper protrusion 123. The second upper protrusion 123 includes the aforementioned valve port portion 101. The first upper protrusion 122 includes the aforementioned stop portion 102 and a third valve body flow channel 1222. The third valve body flow channel 1222 is recessed downward from the stop portion 102. The outer protrusion 123... The outer wall of sleeve 13 and the inner wall of sleeve 11 are radially spaced apart in sleeve 2. When the control valve is closed, one side of the third valve body flow channel 1222 connects to the chamber below the stop part 102, and the other side of the third valve body flow channel 1222 connects to the gap between the outer wall of the protrusion 313 and the inner wall of the sleeve 11. The moving core iron component 31 includes a balance hole 314, which is at least partially located above the seal 4. The balance hole 314 penetrates the inner wall and outer wall of the moving core iron component 31 radially along sleeve 2. In this way, it can be ensured that the fluid flowing into the control valve is guided when the control valve is closed, so that the fluid can flow. At the same time, after the high-pressure fluid enters the mounting cavity 310 through the balance hole 314, it will also put pressure on the seal 4 to improve the sealing reliability of the seal 4.

[0054] The second upper protrusion 123 includes a straight hole 1232. Since the valve seat 12 and the valve sleeve 11 are machined separately, and the first upper protrusion 122 is close to the stop part 102, the stability of the cutting tool can be effectively guaranteed when machining the straight hole 1232. This not only facilitates machining, but also ensures the accuracy of the straight hole 1232 more precisely.

[0055] The second upper protrusion 123 is generally cylindrical and includes a side hole 1221, which is provided through the sleeve 2 along the axial direction to allow fluid flow.

[0056] like Figure 3-9A As shown, the moving core iron component 31 includes an end component 312, which is at least partially located below the moving core iron 311. The end component 312 is connected to the moving core iron 311, and together they form a mounting cavity 310. The end component 312 includes an outward protrusion 313. Thus, by providing the end component 312, the limitation on the size of the valve port 101 can be reduced, allowing for the design of a larger valve port 101 to improve the flow coefficient of the control valve.

[0057] like Figures 7A-7BAs shown, the end component 312 is an integral structure. The end component 312 includes a cylindrical part 3123, a first inner protrusion 3124, and the aforementioned outer protrusion 313. The cylindrical part 3123 is fixedly connected to the moving core iron 311. The aforementioned outer protrusion 313 protrudes outward from the cylindrical part 3123 in the radial direction of the sleeve 2. The first inner protrusion 3124 protrudes inward from the cylindrical part 3123 in the radial direction of the sleeve 2. The first inner protrusion 3124 serves as the aforementioned limiting part 315.

[0058] like Figures 7C-7D As shown, as an example, the end member 312 includes an end piece 3121 and a connector 3122. A portion of the connector 3122 is located in the inner cavity 20. The connector 3122 is fixedly connected to the moving core iron 311. The end piece 3121 is fitted with the connector 3122. In the radial direction of the sleeve 2, the outer wall of the connector 3122 is fixedly connected to the inner wall of the end piece 3121. The end piece 3121 serves as an outward protrusion 313. Thus, the width dimension of the seal 4 corresponds to the width dimension of the inner wall of the end piece 3121, allowing a larger size seal 4 to be installed in the mounting cavity 310.

[0059] The balance hole 314 is located in the connector 3122. The balance hole 314 is inclined and penetrates the inner wall and outer wall of the connector 3122.

[0060] like Figure 10-11 As shown, as an example, the moving core 311 includes an outwardly protruding extension 3112, which serves as an outwardly protruding portion 313, integrally formed on the moving core 311. The moving core component 31 includes a connecting plate 33, and the moving core 311 includes a riveting portion 3119. The connecting plate 33 is at least partially located in the mounting cavity 310, and the riveting portion 3119 is riveted to the connecting plate 33. A portion of the connecting plate 33 serves as the aforementioned limiting portion 315. Thus, while ensuring that the width of the mounting cavity 310 meets the requirements, the processing difficulty of the moving core 311 can be simplified.

[0061] like Figure 6 , Figure 7B , Figure 7D , Figure 10As shown, the control valve also includes a second elastic element 6. The moving core iron component 31 is clearance-fitted with the sleeve 2. The moving core iron component 31 includes a first blind hole 3115 and a second blind hole 3116. The first blind hole 3115 is located below the second blind hole 3116. Part of the first elastic element 5 is located in the first blind hole 3115, and the other end of the first elastic element 5 abuts against the top wall of the first blind hole 3115. The second elastic element 6 is at least partially located in the second blind hole 3116. One end of the second elastic element 6 abuts against the stationary core iron 32, and the other end of the second elastic element 6 abuts against the bottom wall of the second blind hole 3116. The moving core iron component 31 includes a connecting hole 3117, which axially connects the first blind hole 3115 and the second blind hole 3116 in the sleeve. Thus, when the fluid flows between the chamber above the moving core iron component 31 and the chamber above the moving core iron component 31, it can not only guide the fluid to flow between the outer wall of the moving core iron component 31 and the inner wall of the sleeve 2, but also flow in the first blind hole 3115, the connecting hole 3117 and the second blind hole 3116, thereby improving the motion performance of the moving core iron component 31 and thus improving the response speed of the control valve.

[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 above examples illustrate the principles and implementation methods of this utility model. The descriptions of these embodiments are merely for the purpose of helping to understand the technical solution and core ideas of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A control valve, characterized in that, The device includes a valve body component (1), a sleeve (2), a core iron component (3), a seal (4), and a first elastic element (5). The valve body component (1) is fixedly connected to the sleeve (2). The valve body component (1) includes a valve port (101) and a stop portion (102). The core iron component (3) includes a moving core iron component (31). At least a portion of the moving core iron component (31) is located in the inner cavity (20) of the sleeve (2). The moving core iron component (31) includes a mounting cavity (310). At least a portion of the seal (4) is located in the mounting cavity (310). The seal (4) includes an upper end face (41) and a sealing surface (42). The upper end face (41) is located above the sealing surface (42). In the axial direction of the sleeve (2), one end of the first elastic element (5) abuts against the upper end face (41), and the other end of the first elastic element (5) abuts against the moving core iron component (31). When the control valve is closed, the moving core iron component (31) abuts against the stop part (102), the sealing surface (42) blocks the valve port (101), and in the axial direction of the sleeve (2), the upper end surface (41) is higher than the stop part (102).

2. The control valve according to claim 1, characterized in that, The core iron component (3) also includes a stationary core iron (32), which is fixedly connected to the sleeve (2). The stationary core iron (32) is located above the moving core iron component (31). The stationary core iron (32) includes a first end face (321) facing the moving core iron component (31), and the moving core iron component (31) includes a second end face (3111) facing the stationary core iron (32). Defined as L1, the minimum distance between the stop part (102) and the first end face (321) in the axial direction of the sleeve (2) is defined as L2. When the control valve is in the closed state, the minimum distance between the valve port part (101) and the second end face (3111) in the axial direction of the sleeve (2) is defined as L2. Then, L1 > L2 is satisfied.

3. The control valve according to claim 1, characterized in that, The moving core component (31) includes a moving core (311) and an end component (312). The end component (312) is at least partially located below the moving core (311). The end component (312) is connected to the moving core (311). The end component (312) and the moving core (311) together form the mounting cavity (310). The end component (312) can abut against the stop portion (102).

4. The control valve according to claim 3, characterized in that, The moving core iron (311) includes a first section (3113) and a second section (3114). The second section (3114) is closer to the valve port (101) than the first section (3113). In the radial direction of the sleeve (2), the distance between the second section (3114) and the inner wall of the sleeve (2) is greater than the distance between the first section (3113) and the inner wall of the sleeve (2). The end component (312) includes a cylindrical portion (3123), which is partially located in the inner cavity (20). The cylindrical portion (3123) is located below the second section (3114) in the radial direction of the sleeve (2). The distance between the cylindrical portion (3123) and the inner wall of the sleeve (2) is greater than the distance between the first section (3113) and the inner wall of the sleeve (2). The cylindrical portion (3123) is welded to the second section (3114).

5. The control valve according to claim 3, characterized in that, The moving core iron (311) includes a second section (3114), the end component (312) includes a cylindrical part (3123) and a first inner protrusion (3124), the cylindrical part (3123) is fixedly connected to the second section (3114), the first inner protrusion (3124) protrudes radially inward from the cylindrical part (3123) in the sleeve (2), the sealing element (4) includes a large diameter section (45) and a small diameter section (44), the large diameter section (45) includes the upper end face (41), the small diameter section (44) includes a sealing surface (42), the inner wall of the cylindrical part (3123) is clearance-fitted with the outer wall of the large diameter section (45), and the inner wall of the first inner protrusion (3124) is clearance-fitted with the outer wall of the small diameter section (44).

6. The control valve according to any one of claims 3-5, characterized in that, The valve body component (1) includes a valve body (13), which includes a second hole (131), a second step (132), a third hole (134), a first valve body flow channel (135), and a second upper protrusion (123). The second upper protrusion (123) protrudes upward along the axial direction of the sleeve (2) and includes the valve port (101). In the radial direction of the sleeve (2), the third hole (134) is located outside the second upper protrusion (123), and the second step (132) is located between the second hole (131) and the third hole (134). The second step portion (132) includes the stop portion (102). The second step surface (1321) of the second step portion (132) faces upward. The first valve body flow channel (135) is recessed downward from the second step surface (1321). The first valve body flow channel (135) penetrates the wall of the third hole portion (134) radially through the sleeve (2). When the control valve is in the closed state, one side of the first valve body flow channel (135) is connected to the chamber below the stop portion (102), and the other side of the first valve body flow channel (135) is connected to the gap between the side wall of the end member (312) and the inner wall of the valve body (13). The end component (312) includes a cylindrical portion (3123) including a balancing hole (314) which is at least partially located above the seal (4) and extends radially through the inner wall and outer wall of the cylindrical portion (3123) along the sleeve (2).

7. The control valve according to claim 6, characterized in that, The valve body (13) includes a second valve body flow channel (136), which is recessed outward from the hole wall of the second hole (131), and the second valve body flow channel (136) is connected to the first valve body flow channel (135).

8. The control valve according to claim 1, characterized in that, The valve body component (1) includes a valve sleeve (11) and a valve seat (12). The valve sleeve (11) is disposed over the valve seat (12). The valve sleeve (11) is fixedly connected to the valve seat (12). The valve seat (12) includes the valve port (101) and the stop portion (102). The moving core iron component (31) includes a moving core iron (311) and an outward protrusion (313). The outward protrusion (313) is located above the valve seat (12). The outward protrusion (313) protrudes radially outward from the sleeve (2). The outward protrusion (313) can abut against the stop part (102).

9. The control valve according to claim 8, characterized in that, The moving core iron (311) includes an outwardly protruding extension (3112), which serves as the protruding part (313), and the protruding part (313) is integrally formed on the moving core iron (311).

10. The control valve according to claim 9, characterized in that, The moving core component (31) includes an end component (312), which is at least partially located below the moving core component (311). The end component (312) is connected to the moving core component (311), and the end component (312) and the moving core component (311) together form the mounting cavity (310). The end component (312) includes the protrusion (313).

11. The control valve according to claim 10, characterized in that, The end component (312) includes an end piece (3121) and a connector (3122). A portion of the connector (3122) is located in the inner cavity (20). The connector (3122) is fixedly connected to the moving core iron (311). The end piece (3121) is fitted over the connector (3122). In the radial direction of the sleeve (2), the outer wall of the connector (3122) is fixedly connected to the inner wall of the end piece (3121). The end piece (3121) serves as the protruding part (313).

12. The control valve according to any one of claims 8-11, characterized in that, The valve seat (12) includes a seat body portion (121), a first upper protrusion (122), and a second upper protrusion (123). The first upper protrusion (122) protrudes upward from the seat body portion (121), and the second upper protrusion (123) protrudes upward from the seat body portion (121). The first upper protrusion (122) is located outside the second upper protrusion (123). The second upper protrusion (123) includes the valve port portion (101), and the first upper protrusion (122) includes the stop portion (102) and the third valve. The third valve body flow channel (1222) is recessed downward from the stop (102). The outer wall of the protrusion (313) and the inner wall of the valve sleeve (11) are radially spaced in the sleeve (2). When the control valve is closed, one side of the third valve body flow channel (1222) is connected to the chamber below the stop (102), and the other side of the third valve body flow channel (1222) is connected to the gap between the outer wall of the protrusion (313) and the inner wall of the valve sleeve (11). The moving core iron component (31) includes a balance hole (314), which is at least partially located above the seal (4) and extends radially through the inner wall and outer wall of the moving core iron component (31) along the sleeve (2).

13. The control valve according to any one of claims 1-5, characterized in that, The control valve further includes a second elastic element (6), and the core iron component (3) further includes a stationary core iron (32). The stationary core iron (32) is fixedly connected to the sleeve (2). The stationary core iron (32) is located above the moving core iron component (31). The outer wall of the moving core iron component (31) is clearance-fitted with the inner wall of the sleeve (2). The moving core iron component (31) includes a first blind hole (3115) and a second blind hole (3116). The first blind hole (3115) is located below the second blind hole (3116). Part of the first elastic element (5) is located in the first blind hole (3115). The other end of the first elastic element (5) abuts against the top wall of the first blind hole (3115). At least part of the second elastic element (6) is located in the second blind hole (3116). One end of the second elastic element (6) abuts against the stationary core iron (32), and the other end of the second elastic element (6) abuts against the bottom wall of the second blind hole (3116).

14. The control valve according to any one of claims 1-5, characterized in that, The control valve includes a connecting pipe component (7), which includes a first connecting pipe (71) and a second connecting pipe (72). The valve body component (1) includes an inlet end (106) and an outlet end (107). The first connecting pipe (71) is connected to the inlet end (106), and the second connecting pipe (72) is connected to the outlet end (107). The valve body component (1) includes a first hole (133), a second hole (131), and a first step (137). The first step (137) is located between the first hole (133) and the second hole (131). The first step surface (1371) of the first step (137) faces upward. The sleeve (2) is located on the first step surface (1371). The minimum distance between the hole wall of the first hole (133) and the hole wall of the second hole (131) in the radial direction of the sleeve (2) is less than or equal to the wall thickness of the sleeve (2). The valve body component (1) includes a second upper protrusion (123), which includes an inwardly protruding second inner protrusion (1231) and a straight hole (1232). The second inner protrusion (1231) is located above the straight hole (1232), and a portion of the second inner protrusion (1231) serves as the valve port (101), or the second upper protrusion (123) includes the straight hole (1232). The moving core iron component (31) includes an inwardly protruding limiting part (315), and the sealing element (4) includes a large-diameter section (45) and a small-diameter section (44). The large-diameter section (45) includes the upper end face (41), and the small-diameter section (44) includes a sealing surface (42). The large-diameter section (45) can abut against the limiting part (315) in the axial direction of the sleeve (2).

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