Electric valve

Abstract

An electric valve, comprising a valve assembly (100). The valve assembly (100) comprises a valve seat component (1), a valve core component (2), a screw rod component (3), and a nut component (6); the screw rod component (3) is in threaded fit with the nut component (6); the valve seat component (1) comprises a first valve port portion (11) and a second valve port portion (12); the valve core component (2) comprises a first sealing portion (211) and a second sealing portion (212); the valve assembly (100) further comprises a first elastic member (71), a second elastic member (72), and a movable stop member (73); the second elastic member (72) abuts against the movable stop member (73); the first sealing portion (211) abuts against the first valve port portion (11), and then the screw rod component (3) can continue to press the first elastic member (71); and the second sealing portion (212) abuts against the second valve port portion (12), and then the screw rod component (3) can drive the movable stop member (73) to press the second elastic member (72), thereby facilitating preventing the screw rod component (3) and the nut component (6) from being stuck.

Description

An electric valve

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on March 28, 2024, with application number 202410373468.9 and invention name “A Electric Valve”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of fluid control, and in particular to an electric valve. Background Art

[0003] In the related technology, the electric valve includes a valve core assembly, a screw assembly and a nut assembly. The screw assembly and the nut assembly are threaded together. The screw assembly can drive the valve core assembly to open or close the valve port. When there are two valve ports, when closing any valve port, the screw assembly and the threaded assembly may be stuck due to thread locking. Summary of the Invention

[0004] The purpose of the present application is to provide an electric valve that helps to avoid jamming caused by locking of the screw rod assembly and the threaded assembly.

[0005] To achieve the above objectives, one embodiment of the present application adopts the following technical solution:

[0006] 14. The electric valve according to claim 13, wherein the cam is adapted to engage with the cam in a direction of moving the cam in an axial direction and the cam is adapted to engage with the cam in a direction of moving the cam.

[0007] In the embodiment of the electric valve provided in the present application, the valve component also includes a first elastic member, a second elastic member and a movable stop member. The second elastic member abuts against the movable stop member. After the first sealing portion abuts against the first valve mouth, the screw assembly can continue to compress the first elastic member. After the second sealing portion abuts against the second valve mouth, the screw assembly can drive the movable stop member to compress the second elastic member. This arrangement is conducive to avoiding jamming caused by locking of the screw assembly and the threaded assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] FIG1 is a schematic structural diagram of a valve component according to an embodiment of the present application from one perspective;

[0009] FIG2 is a schematic cross-sectional view of the valve component along plane AA in FIG1 ;

[0010] FIG3 is an enlarged structural diagram of portion A in FIG2 ;

[0011] FIG4 is a schematic cross-sectional structural diagram of another embodiment of the valve component in FIG1 from one perspective. DETAILED DESCRIPTION

[0012] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0013] The following specific embodiments describe in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0014] In conjunction with Figures 1-4, an embodiment of an electric valve is shown. The electric valve includes a drive component (not shown in the figure) and a valve component 100. The drive component is located on the outer periphery of a portion of the valve component 100. The drive component is fixedly connected or limit-connected to the valve component 100. Furthermore, a seal can be provided between the drive component and the valve component 100 to prevent water vapor or other impurities in the external environment from entering through the assembly gap between the drive component and the valve component 100, causing corrosion or failure inside the drive component. The drive component includes an outer shell and a stator assembly. The stator assembly is located on the outer periphery of a portion of the valve component 100, and at least a portion of the stator assembly is located on the outer periphery of the rotor assembly 9 of the valve component 100. The electric valve is electrically connected and / or signal-connected to the outside world through the drive component.

[0015] 1-4 , in this embodiment, the valve component 100 includes a valve seat assembly 1, a valve core assembly 2, a screw assembly 3, a rotor assembly 9, and a sleeve 5. The sleeve 5 is fixedly connected to the valve seat assembly 1, and the rotor assembly 9 is located in the inner cavity of the sleeve 5. The rotor assembly 9 is fixedly connected to the screw assembly 3. The valve component 100 also includes a nut assembly 6, which is fixedly connected to the valve seat assembly 1. The nut assembly 6 has an internal thread, and the screw assembly 3 has an external thread. The screw assembly 3 and the nut assembly 6 are threadedly engaged. The valve component 100 also includes a bearing 4. The valve core assembly 2 and the screw assembly 3 are connected via the bearing 4. The valve core assembly 2 does not rotate relative to the screw assembly 3. The screw assembly 3 can drive the valve core assembly 2 to move axially along the valve component 100. This arrangement is beneficial for avoiding wear between the valve core assembly 2 and related components caused by the rotation of the valve core assembly 2 relative to the valve seat assembly 1, and in particular, it can avoid wear between the valve core assembly 2 and the first valve port portion 11 and the second valve port portion 12.

[0016] 1-3 , in this embodiment, the valve seat assembly 1 has a valve seat cavity 14, and at least a portion of the valve core assembly 2 is located in the valve seat cavity 14. The valve seat assembly 1 includes a first valve opening portion 11 and a second valve opening portion 12, and the valve core assembly 2 includes a first sealing portion 211 and a second sealing portion 212. The valve component 100 also includes a first elastic member 71, a second elastic member 72, and a movable stopper 73. The second elastic member 72 abuts against the movable stopper 73. After the first sealing portion 211 abuts against the first valve opening portion 11, the screw assembly 3 can continue to compress the first elastic member 71. After the second sealing portion 212 abuts against the second valve opening portion 12, the screw assembly 3 can drive the movable stopper 73 to compress the second elastic member 72. Such an arrangement can avoid the screw rod assembly 3 and the nut assembly 6 from being locked and stuck when the first valve opening portion 11 or the second valve opening portion 12 is closed. Taking the first sealing portion 211 closing the first valve opening portion 11 as an example for exemplary description, after the first sealing portion 211 abuts against the first valve opening portion 11, the screw rod assembly 3 may continue to rotate relative to the nut assembly 6 (the rotation of the screw rod assembly 3 is driven by the rotor assembly 9). If the first elastic member 71 is not provided, that is, the screw rod assembly 3 does not continue to compress the first elastic member 71 after the first sealing portion 211 abuts against the first valve opening portion 11, the external thread of the screw rod assembly 3 and the internal thread on the nut assembly 6 may be locked more and more tightly, resulting in locking. At the same time, the provision of the first elastic member 71 can also provide a buffer when the first sealing portion 211 collides with the first valve opening portion 11, avoiding damage to both due to collision. Of course, the provision of the first elastic member 71 can also serve to avoid the first sealing portion 211 and the first valve opening portion 11 from being stuck. The provision of the second elastic member 72 can also have a similar effect. In this embodiment, the first valve opening portion 11 and / or the first sealing portion 211 has a throttling surface, and the second valve opening portion 12 and / or the second sealing portion 212 has a throttling surface.

[0017] 1-3 , in this embodiment, the valve core assembly 2 includes a valve needle sleeve 22, which defines a valve needle sleeve cavity 221. A first elastic member 71 is located in the valve needle sleeve cavity 221 and is compressed between the screw assembly 3 and the lower end wall forming the valve needle sleeve cavity 221. A portion of the lower end of the movable stopper 73 abuts against the valve needle sleeve 22, a portion of the lower end of the movable stopper 73 abuts against the screw assembly 3, and an upper end of the movable stopper 73 abuts against the second elastic member 72.

[0018] 1-3 , in this embodiment, the valve component 100 further includes a cover component 8, which includes a cover plate 81 and a barrel portion 82. The cover component 8 defines an accommodating cavity 83, in which at least a portion of the second elastic member 72 is located. The barrel portion 82 of the cover component 8 is fixedly connected to the needle sleeve 22. One end of the second elastic member 72 abuts the cover plate 81, and the other end abuts the movable stopper 73. In this embodiment, at least a portion of the barrel portion 82 is located in the needle sleeve cavity 221. The needle sleeve 22 has a limiting step 222, and the barrel portion 82 has a limiting flange 821. The limiting flange 821 abuts the limiting step 222, limiting the axial position of the barrel portion 82 relative to the needle sleeve 22. The barrel portion 82 and the needle sleeve 22 are fixed by welding. The limiting step 222 can be, for example, the top surface of the needle sleeve 22, or can be located within the needle sleeve cavity 221. In another embodiment, it can be arranged that the valve core assembly 2 includes a second cavity (not shown in the figure), the second elastic member 72 is located in the second cavity, the valve core assembly 2 also includes a cover plate 81, the cover plate 81 is fixedly connected to the valve needle sleeve 22, one end of the second elastic member 72 abuts against the cover plate 81, and the other end abuts against the movable stop member 73.

[0019] 1-3 , in this embodiment, the valve needle sleeve 22 has a first step portion 223 , which is located on the inner circumferential wall formed on the valve needle sleeve cavity 221 , and a portion of the lower end surface of the movable stopper 73 abuts against the bottom wall of the first step portion 223 , and the elastic force of the second elastic member 72 is greater than the elastic force of the first elastic member 71 . The movable stopper 73 will only disengage from the bottom surface of the first step portion 223 when the elastic force of the second elastic member 72 is overcome and the movable stopper 73 is driven to move during the upward movement of the screw rod assembly 3. In other cases, the second elastic member 72 can press the movable stopper 73 against the bottom surface of the first step portion 223, that is, unless the second sealing portion 212 abuts against the second valve mouth portion 12, the screw rod assembly 3 continues to drive the movable stopper 73 to compress the second elastic member 72, so that the movable stopper 73 disengages from the bottom surface of the first step portion 223. In other cases, the second elastic member 72 can press the movable stopper 73 against the bottom surface of the first step portion 223. The first step portion 223 is provided to limit the lowest end position of the movable stop member 73 relative to the valve needle sleeve 22, and to ensure that when the movable stop member 73 abuts against the first step portion 223, the second elastic member 72 will not generate a force on the first elastic member 71. With this arrangement, the relative position of the screw rod assembly 3 relative to the valve core assembly 2 can be relatively fixed, and the interaction between the first elastic member 71 and the second elastic member 72 will not cause the position of the screw rod assembly 3 relative to the valve core assembly 2 to be a constantly changing quantity and cannot be determined.

[0020] 1-3 , in this embodiment, the screw assembly 3 includes a screw 31 and a bearing 4. A movable stopper 73 is disposed on the outer circumference of the screw 31, and a cover member 8 is sleeved around the outer circumference of the screw 31. The bearing 4 includes a bearing inner ring 41 and a bearing outer ring 42. The bearing inner ring 41 is fixedly connected or positionally connected to the screw 31, while the bearing outer ring 42 is in contact or clearance fit with the inner circumferential wall forming the valve needle sleeve cavity 221. The bearing inner ring 41 is rotatable relative to the bearing outer ring 42. The upper end of the first elastic member 71 is in constant contact with the lower end of the bearing outer ring 42, and the upper end of the bearing outer ring 42 can abut against a portion of the lower end surface of the movable stopper 73.

[0021] 1-3 , in this embodiment, the screw rod 31 has a stepped portion 311 and a riveted portion 312, which are located on different sides of the bearing inner ring 41. The upper end of the bearing inner ring 41 abuts the stepped portion 311, and the lower end of the bearing inner ring 41 is fixed or restrained by the riveted portion 312. The figure only shows the riveted portion 32 before riveting. After riveting, the riveted portion 32 is turned outward to fix or restrain the bearing inner ring 41.

[0022] In conjunction with Figures 1-3, the valve core assembly 2 also has a balancing hole 24, which is located on the central axis of the valve core assembly 2. The balancing hole 24 connects the valve needle sleeve cavity 221 and the lower space of the valve core assembly 2. A balancing channel is provided between the movable stopper 73 and the screw rod 31, which connects the valve needle sleeve cavity 221 and the cavity formed by the cover component 8. A balancing channel is provided between the cover component 8 and the screw rod 31, which connects the cavity formed by the cover component 8 and the space above the valve core assembly 2. The space above the valve core assembly 2 refers to the space between the nut assembly 6 and the valve core assembly 2. The space where the rotor assembly 9 is located and the space above the valve core assembly 2 can be further connected through a balancing structure. Combined with the balancing hole 24 provided on the valve core assembly 2, this arrangement can balance the pressure in the upper and lower spaces of the valve core assembly 2, reducing the driving force required to open the electric valve.

[0023] 1-3 , in one implementation of this embodiment, the valve core assembly 2 further includes a valve needle body 23 , the valve needle body 23 and the valve needle sleeve 22 are an integral structure, the first sealing portion 211 and the second sealing portion 212 are an integral structure with the valve needle body 23 , and the first sealing portion 211 and the second sealing portion 212 are flange-shaped.

[0024] 1-3 , in this embodiment, the first valve opening 11 has a first sealing member 111, and the second valve opening 12 has a second sealing member 121. The first sealing member 111 is made of a resin material or a rubber material, and the second sealing member 121 is also made of a resin material or a rubber material. The valve seat assembly 1 includes a first valve seat portion 131, a second valve seat portion 132, and a third valve seat portion 133. The first valve seat portion 131 and the second valve seat portion 132 are fixed by welding, and the second valve seat portion 132 and the third valve seat portion 133 are fixed by welding. The first sealing member 111 is compressed between the first valve seat portion 131 and the second valve seat portion 132, and the second sealing member 121 is compressed between the second valve seat portion 132 and the third valve seat portion 133. The first valve seat portion 131 has a first circulation channel 1311, the second valve seat portion 132 has a second circulation channel 1321, and the third valve seat portion 133 has a third circulation channel 1331. When the first valve mouth portion 11 is closed, the first sealing portion 211 abuts against the first sealing component 111, and the second circulation channel 1321 circulates with the first circulation channel 1311 through the second valve mouth portion 12; when the second valve mouth portion 12 is closed, the second sealing portion 212 abuts against the second sealing component 121, and the second circulation channel 1321 is connected with the third circulation channel 1331 through the first valve mouth portion 11. Of course, the first valve mouth portion 11 and the second valve mouth portion 12 can be connected at the same time.

[0025] 1-3 , in this embodiment, the first valve seat portion 131 includes a transverse mounting portion 1312 and a longitudinal mounting portion 1313. The transverse mounting portion 1312 extends relative to the central axis of the valve component 100, and the first sealing member 111 is compressed between the transverse mounting portion 1312 and the upper end surface of the second valve component 100. The first sealing member 111 contacts the inner wall of the longitudinal mounting portion 1313, and a second sealing ring 1314 is provided between the transverse mounting portion 1312 and the first sealing portion 211, or the first sealing member 111 is provided between the inner wall of the longitudinal mounting portion 1313 and the first sealing member 111. This arrangement is conducive to improving internal leakage performance. Of course, in another embodiment, the first valve mouth portion 11 and the second valve mouth portion 12 of the valve seat assembly 1 can be made of metal materials, that is, the first valve mouth portion 11 can be provided with the first sealing component 111, and the first valve mouth portion can be a flange integrally provided with the first valve seat portion 131 or the second valve seat portion 132, and the second valve mouth portion 12 can be provided with the second sealing component 121, and the second valve mouth portion can be a flange integrally provided with the second valve seat portion 132 or the third valve seat portion 133.

[0026] Referring to Figure 4 , in another embodiment of this embodiment, the valve core assembly 2 further includes a valve needle body 23, which is integrally formed with the valve needle sleeve 22. The valve core assembly 2 includes a sealing portion 21, which comprises a first sealing portion 211 and a second sealing portion 212. The sealing portion 21 and the valve needle body 23 are separate structures and are fixedly connected. Separately forming the sealing portion 21 and then fixedly connecting it to the valve needle body 23 facilitates the processing and forming of the valve core assembly.

[0027] Referring to Figure 4, in this embodiment, the sealing portion 21 is made of a resin material or a rubber material, and a recessed portion 213 is provided between the first sealing portion 211 and the second sealing portion 212. The recessed portion 213 can be, for example, semicircular or square, which not only helps to reduce material consumption and cost, but also helps to reduce flow resistance. In this embodiment, the sealing portion 21 is made of a plastic material or a rubber material, and the first valve opening portion 11 and the second valve opening portion 12 of the valve seat assembly 1 can be made of a metal material, that is, the first valve opening portion 11 can be provided without the first sealing member 111, and the first valve opening portion can be a flange integrally provided with the first valve seat portion 131 or the second valve seat portion 132, and the second valve opening portion 12 can be provided without the second sealing member 121, and the second valve opening portion can be a flange integrally provided with the second valve seat portion 132 or the third valve seat portion 133. Such a configuration not only helps to improve the sealing performance, but also helps to simplify the processing difficulty of the valve seat assembly 1 and simplify the structure.

[0028] Referring to Figure 4 , in this embodiment, the sealing portion 21 has a first central hole 214 through which the valve needle body 23 passes. The valve core assembly 2 also includes a first sealing ring 215, which is located between the sealing portion 21 and the valve needle body 23. The first sealing ring 215 reduces internal leakage between the sealing portion 21 and the valve needle body 23. The valve core assembly 2 also includes a support washer 216, which is located below the sealing portion 21 and has a second central hole through which the valve needle body 23 passes. A riveted flange 217 is formed at the end of the valve needle body 23 to support and secure the support washer 216. The illustration only shows the flange 217 in its pre-riveted state; after riveting, the flange 217 is turned outward. Alternatively, in other embodiments, a riveted flange is formed at the end of the valve needle body 23 , and the riveted flange directly abuts against the lower end of the sealing portion 21 , thereby eliminating the support gasket 216 .

[0029] Referring to Figure 4, in this embodiment, the valve seat assembly 1 includes a first valve seat portion 131 and a third valve seat portion 133. The first valve seat portion 131 and the third valve seat portion 133 are fixedly connected by welding. The first valve seat portion 131 is provided with a flange 1315, and the flange 1315 forms the first valve mouth portion 11. Compared with the previous embodiment, the first sealing member 111 and the second sealing member 121 can be omitted. At the same time, the second valve seat portion 132 can be avoided. In this way, the number of parts and components can be relatively reduced, and the assembly process can also be reduced.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electric valve, characterized in that: The invention comprises a valve component (100), wherein the valve component (100) comprises a valve seat assembly (1), a valve core assembly (2), a screw assembly (3) and a nut assembly (6), wherein the screw assembly (3) is threadedly matched with the nut assembly (6), and the screw assembly (3) can drive the valve core assembly (2) to move along the axial direction of the valve component (100), wherein the valve seat assembly (1) comprises a first valve opening portion (11) and a second valve opening portion (12), wherein the valve core assembly (2) comprises a first sealing portion (211) and a second sealing portion (212), wherein the valve portion The component (100) further includes a first elastic component (71), a second elastic component (72) and a movable stop component (73), wherein the second elastic component (72) abuts against the movable stop component (73), and after the first sealing portion (211) abuts against the first valve mouth portion (11), the screw assembly (3) can continue to compress the first elastic component (71), and after the second sealing portion (212) abuts against the second valve mouth portion (12), the screw assembly (3) can drive the movable stop component (73) to compress the second elastic component (72).

2. The electric valve according to claim 1, characterized in that The valve core assembly (2) includes a valve needle sleeve (22), the valve needle sleeve (22) has a valve needle sleeve cavity (221), the first elastic member (71) is located in the valve needle sleeve cavity (221), the first elastic member (71) is pressed between the screw rod assembly (3) and the lower end wall forming the valve needle sleeve cavity (221), a part of the lower end of the movable stop member (73) abuts against the valve needle sleeve (22), a part of the lower end of the movable stop member (73) abuts against the screw rod assembly (3), and the upper end of the movable stop member (73) abuts against the second elastic member (72).

3. The electric valve according to claim 2, characterized in that The valve component (100) further includes a cover component (8), the cover component (8) includes a cover plate (81) and a barrel (82), the cover component (8) forms an accommodating cavity (83), at least part of the second elastic member (72) is located in the accommodating cavity (83), the barrel (82) of the cover component (8) is fixedly connected to the valve needle sleeve (22), one end of the second elastic member (72) abuts against the cover plate (81), and the other end abuts against the movable stop member (73).

4. The electric valve according to claim 2, characterized in that: The valve core assembly (2) includes a second cavity, the second elastic member (72) is located in the second cavity, the valve core assembly (2) also includes a cover plate (81), the cover plate (81) is fixedly connected to the valve needle sleeve (22), one end of the second elastic member (72) abuts against the cover plate (81), and the other end abuts against the movable stop member (73).

5. The electric valve according to any one of claims 2 to 4, characterized in that: The valve needle sleeve (22) has a first step portion (223), and the first step portion (223) is located on the inner peripheral wall formed in the valve needle sleeve cavity (221). Part of the lower end surface of the movable stopper (73) abuts against the bottom wall of the first step portion (223), and the elastic force of the second elastic member (72) is greater than the elastic force of the first elastic member (71).

6. The electric valve according to claim 5, characterized in that: The screw assembly (3) includes a screw (31) and a bearing (4), the movable stopper (73) is sleeved on the outer periphery of the screw (31), the cover component (8) is sleeved on the outer periphery of the screw (31), the bearing (4) includes a bearing inner ring (41) and a bearing outer ring (42), the bearing inner ring (41) is fixedly connected or limit-connected to the screw (31), the bearing outer ring (42) is in contact fit or clearance fit with the inner circumferential wall forming the valve needle sleeve cavity (221), the bearing inner ring (41) can rotate relative to the bearing outer ring (42), the upper end of the first elastic member (71) is always in contact with the lower end of the bearing outer ring (42), and the upper end of the bearing outer ring (42) can be in contact with part of the lower end face of the movable stopper (73).

7. The electric valve according to any one of claims 1 to 6, characterized in that: The valve core assembly (2) further comprises a valve needle body (23), wherein the valve needle body (23) and the valve needle sleeve (22) are an integral structure, and the valve core assembly (2) has a balancing hole (24), wherein the balancing hole (24) is located on the central axis of the valve core assembly (2), and the balancing hole (24) communicates with the valve needle sleeve cavity (221) and the lower space of the valve core assembly (2); The first sealing portion (211), the second sealing portion (212) and the valve needle body (23) are an integral structure; Alternatively, the valve core assembly (2) includes a sealing portion (21), the sealing portion (21) includes the first sealing portion (211) and the second sealing portion (212), the sealing portion (21) and the valve needle body (23) are separate structures, and the two are fixedly connected.

8. The electric valve according to claim 7, characterized in that The sealing portion (21) is made of a resin material or a rubber material, and a recessed portion (213) is provided between the first sealing portion (211) and the second sealing portion (212).

9. The electric valve according to claim 8, characterized in that The sealing portion (21) has a first center hole (214), and the valve needle body (23) passes through the first center hole (214). The valve core assembly (2) also includes a first sealing ring (215), and the first sealing ring (215) is located between the sealing portion (21) and the valve needle body (23); the valve core assembly (2) also includes a support gasket (216), and the support gasket (216) is located below the sealing portion (21). The support gasket (216) has a second center hole, and the valve needle body (23) passes through the support gasket (216). The end of the valve needle body (23) forms a riveted flange (217), and the riveted flange (217) supports and fixes the support gasket (216); or, the end of the valve needle body (23) forms a riveted flange (217), and the riveted flange (217) abuts against the lower end of the sealing portion (21).

10. The electric valve according to claim 1-9, characterized in that: The first valve mouth portion (11) has a first sealing member (111), and the second valve mouth portion (12) has a second sealing member (121). The first sealing member (111) is made of a resin material or a rubber material, and the second sealing member (121) is made of a resin material or a rubber material. The first sealing member (211) can abut against the first sealing member (111) to close the first valve mouth portion (11), and the second sealing member (212) can abut against the second sealing member (121) to close the second valve mouth portion (12).

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