JP2024513018A - electric valve - Google Patents

Abstract

The electric valve includes a valve body, the valve body includes a valve seat member (10) and a valve body rotor unit (20), and the valve body rotor unit (20) includes a valve stem unit (201) and a valve body (202). ), first and second elastic parts (204/208), and an abutting member (206), the valve stem unit (201) includes a valve stem abutting part (20154), and the second elastic part (208) The valve body (202) is supported by the valve stem abutting part (20154), and includes first and second valve body abutting parts (202b/202c), and is bored in the valve stem unit (201). The valve body contact portion (202b) can contact the second elastic component (208), the first elastic component (204) can contact the valve stem unit (201), and the contact member (206) can contact the second elastic component (208). A first contact part (206a) that comes into contact with the first elastic component (204), a second contact part (206b) that can come into contact with the second valve body contact part (202c), and a valve shaft unit ( 201), the third contact part (206c) is in contact with the valve shaft unit (201), and the first valve body contact part (202b) is in contact with the valve shaft unit (201). When in contact with the second elastic component (208), the second contact portion (206b) does not contact the second valve body contact portion (202c), and the valve body (202) and the valve port (10a) The impact force of the valve body (202) on the valve port (10a) is reduced at the moment of contact with the valve body (202).

Description

This application was filed with the Chinese Patent Office on March 29, 2021, and the application number is 202110329751.8, claiming the priority of the Chinese patent application whose invention title is "electric valve", and all contents thereof. is incorporated by reference into this application.

The present invention relates to the technical field of cooling control, and in particular to motor-operated valves.

Referring to FIG. 11, CN109723884A discloses a motor-operated valve, which includes a guide bush 20 and a valve stem holder 30, the guide bush 20 is provided with a fixed male threaded portion 23, and the valve stem holder 30 is provided with a movable female thread. A portion 33 is provided, and the fixed male threaded portion 23 and the movable female threaded portion 33 constitute a screw feeding mechanism 28 of the electric valve. The valve body of the electric valve is mainly composed of three parts.

The valve stem holder 30 The valve stem 10 is moved up and down with the valve stem holder 30 so that it is inserted into the upper small diameter part 11 of the valve stem 10. A compression coil spring (biasing member) 60 is compressed to bias the valve shaft 10 (valve body 14) downward (valve closing direction) at all times. ing.

An object of the present invention is to provide an electric valve.

The electric valve includes a valve body and a coil, the coil is fitted onto the valve body, the valve body includes a valve seat member and a valve body rotor unit, and the valve body rotor unit includes a valve stem unit and a valve body. body, a first elastic component, an abutment member, and a second elastic component;
The valve stem unit includes a valve stem abutting part, the second elastic component is supported by the valve stem abutting part,
The valve body includes a first valve body abutting part, the valve body is bored in the valve stem unit, and the first valve body abutting part can come into contact with the second elastic component,
The upper end of the first elastic component is in contact with the valve stem unit, the contact member includes a first contact part, and the lower end of the first elastic component is in contact with the first contact part. , the abutment member includes a second abutment part, the valve body includes a second valve body abutment part that can abut against the second abutment part, and the abutment member is attached to the valve stem unit. including a third abutting portion capable of abutting;
The valve seat member includes a valve port that can come into contact with the valve body,
When the third contact portion is brought into contact with the valve shaft unit and the first valve body contact portion is brought into contact with the second elastic component, the second contact portion is brought into contact with the second valve body contact portion. It is not in contact with the contact part.

According to the electric valve provided by the present application, when the third contact portion is brought into contact with the valve shaft unit and the first valve body contact portion is brought into contact with the second elastic component, the third contact portion is brought into contact with the second elastic component. The second contact portion is not brought into contact with the second valve body contact portion, and the valve body is not subjected to the elastic load of the first elastic component, and at the moment of contact between the valve body and the valve opening, the valve body closes to the valve opening of the valve body. Reduce the impact force against.

FIG. 2 is a cross-sectional view of the electrically operated valve of the present invention in a fully closed state. FIG. 2 is a schematic structural diagram of a valve seat member of the electric valve of the present invention. FIG. 3b is a schematic structural view of the rotor member when the electric valve of the present invention is in a fully closed state, and FIG. 3b is a locally enlarged view of FIG. 3a. The motor-operated valve of the present invention is a cross-sectional view of the valve body when the valve body has just opened until it is no longer loaded with the elasticity of the first elastic component, and FIG. 4b is a locally enlarged view of FIG. 4a. The electric valve of the present invention is a cross-sectional view of the valve body when the valve body is opened until the valve head just does not contact the valve port, and FIG. 5b is a locally enlarged view of FIG. 5a. FIG. 6B is a cross-sectional view of the valve body when the electric valve of the present invention is opened to the maximum opening degree, and FIG. 6B is a locally enlarged view of FIG. 6A. The electric valve of the present invention is a cross-sectional view of the valve body when the screw pair is opened excessively until the screw pair is unthreaded, and FIG. 7b is a locally enlarged view of FIG. 7a. FIG. 8b is a cross-sectional view of the valve body when the electric valve according to the second embodiment of the present invention is opened to the maximum opening degree, and FIG. 8b is a locally enlarged view of FIG. 8a. FIG. 9B is a cross-sectional view of the valve body when the electric valve according to the third embodiment of the present invention is opened to the maximum opening degree, and FIG. 9B is a locally enlarged view of FIG. 9A. 10B is a cross-sectional view of a valve body when the motor-operated valve according to the fourth embodiment of the present invention is opened to the maximum opening degree, and FIG. 10B is a local enlarged view of FIG. 10A. It is a sectional view of the electric valve in background art.

In order for those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in more detail below in combination with drawings and specific embodiments.

Referring to FIGS. 1 to 7, FIG. 1 is a cross-sectional view of the electric valve of the present invention in a fully closed state, FIG. 2 is a structural schematic diagram of a valve seat member of the electric valve of the present invention, and FIG. FIG. 3b is a local enlarged view of FIG. 3a, and FIG. 4a shows that the motor-operated valve of the present invention is in a fully closed state when the rotor member is in a fully closed state. FIG. 4b is a locally enlarged view of FIG. 4a, and FIG. 5a is a cross-sectional view of the valve body when the valve body is opened until the elastic force of the spring is not applied. FIG. FIG. 5b is a locally enlarged view of FIG. 5a, and FIG. 6a is a cross-sectional view of the valve body when the electric valve of the present invention is opened to its maximum opening. 6b is a local enlarged view of FIG. 6a, FIG. 7a is a cross-sectional view of the valve body when the electric valve of the present invention is opened excessively until the screw pair is unthreaded, and FIG. FIG. 7a is a locally enlarged view.

Referring specifically to FIGS. 1-3b, in one specific embodiment, the motor-operated valve provided by the present invention includes a valve body and a coil 40, and the coil 40 is fitted onto the valve body. The valve body includes a valve body rotor unit 20 (FIGS. 3a, 3b), a valve seat member 10 (FIG. 2) and a housing 30 (FIG. 1).

Referring to FIG. 1, one end of the housing 30 has an open shape, and the housing 30 is a thin-walled member and has an enclosure shape. ) and a main body portion of the valve body rotor unit 20 (described below) are formed.

Referring to FIGS. 3a and 3b, the valve body rotor unit 20 of the electric valve includes a rotor 203 having magnetic poles in the circumferential direction and a valve shaft unit 201 fixedly connected to the rotor 203. The valve stem unit 201 includes a valve stem 2011 and a bush 2012, and the bush 2012 is fixed at a substantially upper end position of the valve stem 2011, and is fixedly connected to the valve stem 2011 by press fitting or welding, and the upper surface of the bush 2012 is fixed to the valve stem 2011. , including a bushing hole 20121 passing through the lower surface. The valve body rotor unit 20 includes a valve body 202 inserted into a central through hole of a valve shaft 2011, a first elastic component 204 provided within a first valve shaft inner wall portion 20151 (described below) of the valve shaft 2011, and a valve body 202. It further includes a second elastic component 208 provided within a second valve shaft inner wall portion 20153 (described below) of the shaft 2011, and an abutment member 206 provided within the first valve shaft inner wall portion 20151 of the valve shaft 2011.

Referring to FIG. 1, the coil 40 of the electric valve is connected to the drive controller, and after energizing, the drive controller sends a pulse drive signal to the coil 40, and the coil 40 generates a changing magnetic field to rotate clockwise or counterclockwise. The valve body rotor unit 20 of the electric valve is driven to rotate clockwise. In this embodiment, since the valve shaft 2011 is fixedly connected to the rotor 203, it rotates synchronously with the rotor 203, and the spiral feeding mechanism of the valve shaft 2011 and the nut 102 transfers the rotational movement of the rotor 203 in the axial direction. In translation, the valve head 202a drives the valve body 202 toward or away from the valve port 10a, thereby realizing the adjustment function of a linear switch of the electric valve flow rate.

Referring to FIG. 2, combining FIG. 1, the valve seat member 10 has a valve port 10a, a first inlet/outlet passage 10d, and a second inlet/outlet passage 10e, and the valve port 10a communicates with the first inlet/outlet passage 10d and the second inlet/outlet passage 10e to allow a fluid medium (e.g., refrigerant) to pass through. In addition, a through hole penetrating vertically is provided at approximately the center of the valve seat member 10, and a female screw portion 10b (also called a fixed screw portion) is provided on the inner wall of the through hole. The female screw portion 10b is combined with a male screw portion 201a (also called a movable screw portion) provided at a position approximately below the valve shaft 2011 to form a screw pair, i.e., a screw feed mechanism of the motor-operated valve.

In this embodiment, the valve seat member 10 includes a nut 102, the nut 102 includes a through hole, the inner edge of the through hole of the nut 102 is provided with a female threaded portion 10b, and the valve seat member 10 further includes a valve seat 101. , a part of the nut 102 is located within the valve seat 101, and the nut 102 is fixedly connected to the valve seat 101, for example, by injection molding integrally with the nut 102 using the connecting body as an insert, welding or The connecting body and the valve seat 101 are fixedly connected by press-fitting, or the nut 102 and the valve seat 101 are directly press-fitted, and in this embodiment, the connecting body is used as an insert to connect the nut. The nut 102 is integrally injection molded with the valve seat 102, and the nut 102 and the valve seat 101 are fixedly connected by welding. Of course, the nut 102 and the valve seat 101 may be integrally formed.

The nut 102 is provided with a fixed stopper portion 10c so as to protrude from the annular base, and engages with a movable stopper portion 201b provided on the valve body rotor unit 20 to constitute a stopper mechanism at the lower end of the stroke of the electric valve, That is, when the valve body rotor unit 20 moves downward to a predetermined extent with respect to the valve seat member 10, the movable stopper portion 201b comes into contact with the fixed stopper portion 10c, and the valve body rotor unit 20 moves downward to a predetermined extent. further limits continued downward axial movement of the valve body rotor unit 20, thereby controlling the stroke of the downward movement of the valve body rotor unit 20.

In this embodiment, the valve seat 101 is integrally formed with the valve port 10a, and it goes without saying that the valve port 10a may be formed on another member and then this member may be fixed and connected to the valve seat 10. good. In this embodiment, the valve port 10a can come into contact with the valve body head 202a of the valve body 202, and the valve seat 101 is fixedly connected to the first joint pipe part 103 and the second joint pipe part 104. As the fluid medium inflow or outflow passage of the electric valve, the first joint pipe part 103 and the second joint pipe part 104 are generally connected to a system pipe when installed in a cooling or heating system such as an air conditioner.

In this embodiment, a method is adopted in which the first joint pipe section 103 and the second joint pipe section 104 are welded and connected to the valve seat 101. Alternatively, for example, when the electric valve is used in a situation that requires quick repair of a car air conditioner, a heat pump, etc., the first joint pipe part 103, the first joint part 103, The two-junction pipe portion 104 and the valve seat 101 may be connected by a seal using a flange. In this embodiment, an example in which the first joint pipe section 103 and the second joint pipe section 104 are welded and fixed to the valve seat 101 will be described.

Referring to FIGS. 3a and 3b, in this embodiment, the valve shaft 2011 includes a hole penetrating vertically, and the inner wall of the through hole substantially forms the valve shaft inner wall part 2015, and the valve shaft 2011 is axially The inner diameters of the valve shaft inner wall portion 2015 are not equal, and specifically, the valve shaft inner wall portion 2015 has a first valve shaft inner wall portion 20151, a step portion 20152, a second valve shaft inner wall portion 20153, a valve shaft contact portion 20154, and a second valve shaft inner wall portion 20153. The first valve shaft inner wall 20151 includes a third valve shaft inner wall 20155, and in the axial direction of the electric valve, the first valve shaft inner wall 20151 is located above the second valve shaft inner wall 20153, and the second valve shaft inner wall 20153 is located above the third valve shaft inner wall 20153. A plane located above the inner wall 20155 and where the cross section of the valve stem 2011 is located, and the orthographic projection of the first valve stem inner wall 20151 along the plane (the orthographic projection is a closed line or an annular plane) is , an orthographic projection (the orthographic projection is a closed line or an annular surface) of the second valve shaft inner wall 20153 along the plane, and an orthographic projection of the second valve shaft inner wall 20153 along the plane (the orthographic projection is a closed line or an annular surface). The orthographic projection is a closed line or annular surface) is located outside the orthographic projection (the orthographic projection is a closed line or annular surface) along the plane of the third valve stem inner wall portion 20155, and generally In order to facilitate processing and manufacturing, the cross sections of the first valve shaft inner wall portion 20151, the second valve shaft inner wall portion 20153, and the third valve shaft inner wall portion 20155 are all circular in cross section. The diameter of the inner wall portion 20151 is larger than the diameter of the second valve stem inner wall portion 20153, and the diameter of the second valve stem inner wall portion 20153 is larger than the diameter of the third valve stem inner wall portion 20155. Since the first valve shaft inner wall portion 20151, the second valve shaft inner wall portion 20153, and the third valve shaft inner wall portion 20155 have the same diameter, the first valve shaft inner wall portion 20151, the second valve shaft inner wall portion 20153, and the third valve shaft inner wall portion 20153 have the same diameter. The orthographic projection of the inner wall portion 20155 along the plane where the cross section of the valve shaft 2011 is located is circular.

3a and 3b, the step 20152 and the valve stem abutment 20154 have a horizontal extension distance, the step 20152 is higher than the valve stem abutment 20154, and its outer edge is the first It intersects with the valve stem inner wall part 20151, its inner edge intersects with the second valve stem inner wall part 20153, the outer edge of the valve stem abutting part 20154 intersects with the second valve stem inner wall part 20153, and its inner edge intersects with the third valve stem inner wall part. 20155, and the cross sections of the first valve shaft inner wall 20151, the second valve shaft inner wall 20153, and the third valve shaft inner wall 20155 are all circular, the stepped portion 20152 and the valve shaft contact portion 20154, The orthographic projection along the plane in which the cross section of the valve stem 2011 is located has an annular shape, and in this embodiment, the stepped portion 20152 and the valve stem contact portion 20154 are in the horizontal direction. The shaft abutment 20154 may be arranged in an incomplete planar configuration, for example, in a direction away from the center of the valve shaft abutment 20154, the valve shaft abutment 20154 gradually extends upward or downward. , the valve shaft abutting portion 20154 and the step portion 20152 may have an extension distance in the horizontal direction, similar to the step portion 20152.

Of course, one structure of the first valve stem inner wall part 20151, the step part 20152, the second valve stem inner wall part 20153, the valve stem contact part 20154, and the third valve stem inner wall part 20155 has been described above, but the present invention The first valve shaft inner wall portion 20151, the stepped portion 20152, the second valve shaft inner wall portion 20153, the valve shaft contact portion 20154, and the third valve shaft inner wall portion 20155 are not limited to the above structure, and in this embodiment, There is one stepped portion 20152 having a horizontal extension distance between the first valve shaft inner wall portion 20151 and the second valve shaft inner wall portion 20153, and the second valve shaft inner wall portion 20153 and the third valve shaft inner wall portion 20155, there is only one valve shaft abutting portion 20154 having an extension distance in the horizontal direction, and the valve shaft abutting portion 20154 abuts the valve body 202, and the stepped portion 20152 is in contact with the valve body 202. It is brought into contact with the contact member 206 .

Referring to FIG. 1, in this embodiment, the valve shaft 2011 includes an outer edge 2016, specifically, the outer edge 2016 includes a first outer edge 20161 and a second outer edge 20162, and in the axial direction of the electric valve, The first outer edge portion 20161 is located above the second outer edge portion 20162, and the outer edge of the first outer edge portion 20161 in orthographic projection along the plane is the plane where the cross section of the valve shaft 2011 is located. The outer edges of the first outer edge section 20161 and the second outer edge section 20162 are both circular in order to be located outside the outer edge of the orthographic projection along the plane, and to facilitate processing. A rotor fixing part 201c is provided in a portion located on the valve shaft 2011, and the rotor 203 and the rotor fixing part 201c are connected by direct or indirect welding, caulking, injection connection using magnetic plastic material, bonding with adhesive, etc. In this embodiment, the connecting part is connected to the magnetic plastic material by injection as an insert, and then fixedly connected to the valve shaft 2011 by welding, and the rotor 203 and the valve shaft 2011 are If a direct connection method is adopted, the valve stem 2011 may be connected to the magnetic plastic material in an injection manner as an insert.

The second outer edge portion 20162 is provided with a male threaded portion 201a, and the male threaded portion 201a and the female threaded portion 10b provided in the inner hole portion of the nut 102 are combined to constitute a helical feeding mechanism (screw pair) of the electric valve.

3a and 3b, in this embodiment, the electric valve further includes a second elastic component 208, in this embodiment, the second elastic component 208 is a cylindrical coil spring, and the second valve shaft inner wall portion 20153 , and is fitted onto the valve body 202, and its upper end can come into contact with the first valve body abutting portion 202b of the valve body 202 (in the electric valves of FIGS. 3a and 3b, the second elastic component 208 (the upper end portion of which is not yet in contact with the first valve body contact portion 202b), the second elastic component 208 is supported by the valve shaft contact portion 20154.

In the plane where the cross section of the valve stem unit 201 is located, the orthographic projection of the valve stem abutting portion 20154 along the plane and the orthogonal projection of the second elastic component 208 along the plane have an overlapping region. The second elastic component 208 can be supported by the valve stem abutting part 20154, and of course there is a member such as a washer between the valve stem abutting part 20154 and the second elastic component 208 to prevent them from coming into direct contact. is provided, the projection relationship between the valve shaft abutting portion 20154 and the second elastic component 208 does not need to satisfy the above relationship.

Referring to FIGS. 3a and 3b, in this embodiment, the valve body 202 is bored in the valve stem unit 201 (a portion of the valve body 202 is located inside the valve stem inner wall 2015), and the valve body 202 is It has a stepped shaft-like structure and includes a valve body head 202a, which is located substantially at the lower end of the valve body 202 and below the third valve shaft inner wall portion 20155, and whose tip shape is is related to the required flow regulation curve of the motorized valve.

The valve body 202 further includes a first valve body abutting part 202b that can come into contact with the second elastic component 208, and in the state of FIGS. is not in contact with the In the plane where the cross section of the valve body 202 is located, there is an overlapping region between the orthographic projection of the first valve body abutting portion 202b along the plane and the orthogonal projection of the second elastic component 208 along the plane. The first valve body contact portion 202b can contact the second elastic component 208, and of course, the first valve body contact portion 202b and the second elastic component 208 are not in direct contact with each other. When a member such as a washer is provided, the projection relationship between the first valve body contact portion 202b and the second elastic component 208 does not need to satisfy the above relationship.

In this embodiment, the outer edge of the first valve body contacting part 202b and the cross section of the second valve shaft inner wall part 20153 are both circular, and the diameter of the first valve body contacting part 202b is the same as the diameter of the second valve shaft inner wall part 20153. The outer diameter of the second elastic component 208 is slightly smaller than the diameter of the second valve shaft inner wall portion 20153, and the outer diameter of the second elastic component 208 is larger than the diameter of the third valve shaft inner wall portion 20155. , in this case, the valve body 202 can be supported by the second elastic component 208 .

Continuing to refer to FIGS. 3a and 3b, the valve body 202 of this embodiment includes a valve body body 2021 and a valve sleeve 2022, the valve body sleeve 2022 includes a valve body sleeve hole 20221, and the valve body sleeve hole 2022 includes a valve body sleeve 2022. 20221 passes through the upper and lower surfaces of the valve body sleeve 2022, and the upper end of the valve body body 2021 passes through the valve body sleeve hole 20221, and the valve body body 2021 and the valve body sleeve 2022 are press-fitted, welded, or They are fixed and connected using methods such as adhesives.

In this embodiment, the diameter of the valve head 202a is set larger than the diameter of the third valve shaft inner wall 20155, and the valve body 2021 is inserted into the center through hole of the valve shaft 2011 from bottom to top. The body sleeve 2022 is fitted from top to bottom and fixed to the valve body body 2021.

Referring to FIGS. 3a and 3b, the valve body rotor unit 20 of the electric valve of this embodiment further includes a first elastic part 204, the first elastic part 204 is designed as a cylindrical coil spring, and the first valve shaft inner wall part 20151 located within.

The electric valve provided by this embodiment includes a spring contact portion 20a, and the spring contact portion 20a is generally a portion of the valve shaft unit 201 that comes into contact with the upper end portion of the first elastic component 204. , the contact includes direct contact or indirect contact. For example, if a member such as a washer is provided between the bush 2012 and the first elastic component 204, the bush 2012 is still connected to the first elastic component 204 , the valve stem unit 201 is still in contact with the first elastic component 204 . In this embodiment, the bush 2012 is in contact with the first elastic component 204 and includes a spring contact portion 20a.

The electric valve provided by the present application further includes an abutting member 206, the abutting member 206 includes a first abutting part 206a, and the lower end of the first elastic component 204 abuts the first abutting part 206a; The contact member 206 further includes a second contact portion 206b that can contact the second valve body contact portion 202c, and the contact member 206 further includes a third contact portion 206c that can contact the valve shaft unit 201. further including.

In this embodiment, the lower end surface of the valve sleeve 2022 can abut against the second elastic component 208 (for example, in the state of the motor-operated valve in FIGS. 5a and 5b, which will be explained below), and the upper end surface of the valve sleeve 2022 The end face can abut against the washer member 2061 (for example, the state shown in FIGS. 3a and 3b), and the valve body sleeve 2022 includes a first valve body abutting portion 202b and a second valve body abutting portion 202c.

Continuing to refer to FIGS. 3a and 3b, in this embodiment, the abutment member 206 is a washer member 2061, the washer member 2061 includes a washer hole 20611, and the washer hole 20611 is a washer member 2061. The upper end of the valve body 202 passes through the washer hole 20611, and also passes through the first elastic component 204 and the washer hole 20221, with a portion thereof being located in the washer hole 20221. .

With the above installation, when a radial deviation is about to occur, the first elastic component 204 is restricted by the valve body 202, reducing the radial deviation and making the first elastic component 204 more stable within the valve stem unit 201. , extending the service life of electric valves.

The washer member 2061 can come into contact with the stepped portion 20152, and specifically, in the plane where the cross section of the electric valve is located, the washer member 2061 is orthographically projected along the plane and the stepped portion 20152 is projected on the plane. Since there is an overlapping region in the orthographic projection along the plane, the washer member 2061 can come into contact with the stepped portion 20152, and of course there are two or more washers between the washer member 2061 and the stepped portion 20152. When the member 2061 is provided, each washer member 2061 and step portion 20152 do not necessarily satisfy the above relationship. In this embodiment, the outer edge of the washer member 2061 and the inner edge of the stepped portion 20152 are both circular, the outer diameter of the washer member 2061 is slightly smaller than the diameter of the first valve stem inner wall portion 20151, and the washer member 2061 has a circular shape. The outer diameter of the member 2061 is larger than the diameter of the second valve shaft inner wall portion 20153.

3a and 3b, FIG. 1 is combined to show the state when the electric valve is fully closed (that is, the state where the valve body rotor unit 20 is at the lowest end of its stroke), and In this case, the valve body head 202a is brought into contact with and pressed against the valve port 10a, and the first elastic component 204 is in a compressed state, and in this state, the first valve body abutting portion 202b and the first There is an axial distance between the two elastic parts 208 and the two are in a non-contact state, and the second valve body contact part 202c is in contact with the second contact part 206b of the washer member 2061, and the stepped part There is an axial distance between 20152 and the third contact portion 206c of the washer member 2061, and the two are in a non-contact state.

Referring to FIGS. 4a and 4b, FIG. 4a is a cross-sectional view of the valve body of the electric valve of the present invention when the valve body 202 is opened until the valve body 202 is no longer loaded with the elasticity of the first elastic component 204, and FIG. 4a is a locally enlarged view. Compared to the position of the valve body rotor unit 20 when the motor-operated valve is fully closed in FIG. 1, the position of the valve body rotor unit 20 in FIGS. 4a and 4b is opened upward by a certain height, and in this case, the valve body head 202a is still in contact with the valve port 10a. When the valve body rotor unit 20 continues to open upward with the rotor position in FIGS. 4a and 4b as a critical point, the elasticity of the first elastic component 204 is transmitted by the washer member 2061 and is loaded on the stepped portion 20152. The valve body 202 is not receiving the elastic load of the first elastic component 204 .

In this specification, an example will be described in which the pressure in the first inlet/outlet passage 10d is greater than the pressure in the second inlet/outlet passage 10e, and since there is a pressure difference on both sides of the valve port 10a, the valve body 202 is always The valve body 202 of FIGS. 4a and 4b is subjected to the differential pressure and its own gravity, and its head 202a is brought into contact with the valve port 10a. With respect to the electric valve in the state shown in FIGS. 4a and 4b, there is an axial distance between the first valve body contact portion 202b and the second elastic component 208.

5a and 5b, FIG. 5a is a cross-sectional view of the valve body of the motor-operated valve of the present invention when the valve body is opened until the valve head just does not touch the valve port, and FIG. 5b is a local enlargement of FIG. 5a. It is a diagram. From FIGS. 4a and 4b, the position of the valve body rotor unit 20 in FIGS. 5a and 5b is opened upward by a certain height, and in this case, the valve body head 202a is just in the critical state of contact and non-contact with the valve port 10a. be. The valve body 202 is supported by the second elastic component 208 under the action of the differential pressure between both ends of the valve port 10a and its own gravity, and under the action of the gravity of the valve body 202 and the differential pressure applied to the valve body 202, The second elastic component 208 is strained to a certain degree, and in this case, the first valve body abutting portion 202b is brought into contact with the upper end of the second elastic component 208, and the lower end of the second elastic component 208 is brought into contact with the valve shaft. The third contact portion 206c of the washer member 2061 is brought into contact with the step portion 20152, and the elasticity of the first elastic component 204 is transmitted by the washer member 2061 to the step portion 20152. loaded. There is an axial distance h between the second valve body contact portion 202c and the second contact portion 206b, and h>0.

Continuing to refer to FIGS. 5a and 5b, when the third abutting part 206c abuts the stepped part 20152 and the first valve body abutting part 202b abuts the second elastic component 208, the second valve body There is an axial distance h between the contact part 202c and the washer member 2061, and in this case, there is an axial distance between the second valve body contact part 202c and the second contact part 206b, and the second valve body The contact portion 202c is not in contact with the washer member 2061, the elasticity of the first elastic component 204 is applied to the step portion 20152 by the washer member 2061, and the second valve body contact portion 202c is not in contact with the washer member 2061. In other words, the valve body 202 is not subjected to the elastic load of the first elastic component 204, and in this case, the valve body 202 is supported by the second elastic component 208 and suspended. Can be lowered.

Referring to FIGS. 6a and 6b, FIG. 6a is a sectional view of the valve body when the electric valve of the present invention is opened to the maximum opening degree, and FIG. 6b is a locally enlarged view of FIG. 6a. The valve body rotor unit 20 of the motor-operated valve opens from the position shown in FIGS. 5a and 5b to the position shown in FIGS. The first valve body contact portion 202b is always in contact with the upper end portion of the second elastic component 208, and the elasticity of the first elastic component 204 is transmitted by the washer member 2061 and is always loaded on the step portion 20152. In the position of Figures 6a and 6b, the rotor member 20 is opened to its maximum open position under normal operating conditions.

The electric valve of the present application further includes a restriction portion 20b, the valve body 202 further includes a third valve body contact portion 202d, and the restriction portion 20b can contact the third valve body contact portion 202d. In the example, the third valve body abutting part 202d is located at the upper end of the valve body body part 2021 and can abut the housing 30, and the housing 30 includes the restricting part 20b, for example, as shown in FIGS. 6a and 6b. In the electric valve, the valve body 202 has just contacted the housing 30.

7a and 7b, FIG. 7a is a cross-sectional view of the valve body of the motor-operated valve of the present invention when it is opened excessively until the screw pair is unscrewed, and FIG. 7b is a local enlarged view of FIG. 7a. be. If the valve body rotor unit 20 continues to open upward from the state shown in FIGS. 6a and 6b, it will be in an excessively open state. It is in an open state. In the over-open condition, as the valve body rotor unit 20 continues to move upward, the second elastic part 208 is compressed, and the second elastic part 208 is compressed in FIGS. The amount of compression of the second elastic component 208 to be further compressed is m, the third valve body abutting part 202d is already in contact with the housing 30, that is, the limiting part 20b, and the valve shaft unit 201 is in contact with the second valve body abutting part 202d. It receives the downward elastic load of the elastic component 208. When the valve body rotor unit 20 is further opened excessively, the male threaded portion 201a of the valve stem unit 201 and the female threaded portion 10b of the nut 102 are unscrewed (i.e., the states shown in FIGS. 7a and 7b), and after the screwing is removed, , the valve body rotor unit 20 is not moving upward, and when the coil 40 drives the valve body rotor unit 20 in the closing direction of the electric valve, the valve stem unit 201 receives a downward elastic load from the second elastic component 208. When the valve body rotor unit 20 performs a rotational movement, the screw pair is screwed together again.

1, 4a, 4b, 5a, 5b, and 6a, 6b, the valve body rotor unit 20 changes from the fully closed state to the fully open state, and opens upward from the opening state of FIGS. 4a, 4b, Alternatively, when closing from the fully open state shown in FIGS. 6a and 6b to the state shown in FIGS. 4a and 4b, the valve body 202 is not subjected to the spring force load of the first elastic component 204. Particularly, at the moment of contact between the valve body head 202a and the valve port 10a, the valve body 202 is suspended from the second elastic component 208, is not subjected to the elastic load of the first elastic component 204, and is connected to the valve body head 202a. The impact force at the moment of contact with the valve port 10a is reduced, the wear of the contact area between the two is reduced, and the service life of the electric valve is extended. The frictional force (related to the pressure of the valve body 202 against the valve port 10a) reduces wear on the valve body 202 and the valve port 10b.

Referring to FIGS. 6a and 6b, in this embodiment, the structural features that can realize the above functional effects are as follows: the washer member 2061 is in contact with the stepped portion 20152, and the valve body 202 is in contact with the valve port 10a. When the valve body 202 is supported by the second elastic component 208 and suspended, there is an axial distance h between the second valve body contact portion 202c and the second contact portion 206b of the washer member 2061. do. The electric valve has a constant opening stroke, preferably h is less than 0.3 mm.

Referring to FIGS. 8a and 8b, FIG. 8a is a sectional view of the valve body when the second embodiment of the electric valve of the present invention is opened to the maximum opening degree, and FIG. 8b is a locally enlarged view of FIG. 8a. Compared to the first embodiment shown in FIGS. 6a and 6b, which have the same opening state, the main difference in this embodiment is that the valve body 202 is integrally molded, and the valve body 202 is formed above the center through hole of the valve shaft 2011. In this embodiment, the washer member 2061 is still in contact with the stepped portion 20152, the valve body 202 is not in contact with the valve port 10a, and the valve body 202 is inserted downward. When supported by the second elastic component 208 and suspended, there is an axial distance h between the second valve body contact portion 202c and the second contact portion 206b of the washer member 2061.

Referring to FIGS. 9a and 9b, FIG. 9a is a sectional view of the valve body when the third embodiment of the electric valve of the present invention is opened to the maximum opening degree, and FIG. 9b is a locally enlarged view of FIG. 9a.

The abutting member 206 provided by this embodiment includes an abutting holder 2062, which can abut against the valve shaft abutting part 20154, has a substantially cylindrical structure, and has an abutting holder located on the ceiling. It includes a ceiling part 20621 and an abutment holder side part 20622 formed to extend downwardly along the circumferential edge of the abutment holder ceiling part 20621, and the abutment holder side part 20622 has a hollow shape. present.

The contact holder 2062 further includes a contact holder hole 20623, which passes through the upper and lower surfaces of the contact holder ceiling 20621, and the upper end of the valve body 202 is connected to the contact holder hole 20623 and the lower surface. 1 elastic component 204 and bush hole 20121.

Furthermore, in this embodiment, the stepped portion 20152 does not need to be provided on the valve shaft inner wall portion 2015. Specifically, when the electric valve is in the state shown in FIGS. 9a and 9b, the valve body 202 is 208, the first valve body abutting part 202b abuts the second elastic component 208, the abutting holder 2062 is fitted onto the valve body 202, and the lower end of the abutting holder side part 20622 is in contact with the valve stem abutting portion 20154 (therefore, the stepped portion 20152 does not need to be disposed, and the function of the stepped portion 20152 is realized by the valve stem abutting portion 20154), and in this embodiment, the abutting The holder 2062 includes a third abutting part 206c, the third abutting part 206c is a part that abuts the valve shaft abutting part 20154, and the abutting holder ceiling part 20621 abuts the first elastic component 204. The contact holder 2062 includes a first contact part 206a, and in this embodiment, the contact holder 2062 is brought into contact with the valve shaft contact part 20154, and the valve body 202 is not brought into contact with the valve port 10a. When the valve body 202 is suspended and supported by the second elastic component 208, there is an axial distance h between the second valve body contact portion 202c and the lower surface of the contact holder ceiling portion 20621.

When the valve body 202 is raised by a distance h with respect to the valve stem unit 201, the lower end surface of the contact holder ceiling portion 20621 contacts the second valve body contact portion 202c, and the first valve body contact portion 202b contacts the second valve body contact portion 202c. When the valve body 202 is further raised relative to the valve shaft unit 201 without contacting the second elastic component 208, the second contact portion 206b of the contact holder 2062 contacts the second valve body contact portion 202c. The valve body 202 receives the elastic load of the first elastic component 204 due to the transmission of the contact holder 2062. In this case, the elasticity of the first elastic component 204 is transmitted to the valve port 10a by the valve body 202, and the valve body 202 receives the elastic load of the first elastic component 204. and the valve port 10a.

Of course, for this embodiment, a configuration in which the stepped portion 20152 is not provided is adopted, but for the present application, the stepped portion 20152 is not necessarily disposed. However, the stepped portion 20152 can come into contact with the lower end of the contact holder side portion 20622, and even in this case, the technical effects of the present application can be achieved.

Referring to FIGS. 10a and 10b, FIG. 10a is a sectional view of the valve body when the fourth embodiment of the electric valve of the present invention is opened to the maximum opening degree, and FIG. 10b is a locally enlarged view of FIG. 10.

In this embodiment, the valve stem unit 201 includes a valve stem main body part 2013 and a cylindrical part 2014, the valve stem main body part 2013 has a through hole penetrating vertically, and the valve stem main body part 2013 has a male threaded part. 201a is provided, the valve stem main body part 2013 is fixedly connected to the cylindrical part 2014, and a valve stem inner wall part 2015 is formed in the substantially inner wall area of the center through hole after both are fixed and connected. In this embodiment, the upper end portion of the valve stem main body part 2013 enters into the through hole of the cylindrical part 2014, and the valve stem main part 2013 does not enter into the through hole of the cylindrical part 2014, and the cylindrical part 2014 may be adopted. The cylindrical component 2014 has a substantially hollow cylindrical shape and includes a cylindrical component abutting portion 20141, which is in contact with the first elastic component 204, and in this case, the cylindrical component abutting portion 20141 is in contact with the first elastic component 204. The contact portion 20141 includes a spring contact portion 20a, and a cylindrical component through hole portion 201411 is provided approximately at the center of the cylindrical component contact portion 20141. The upper end surface of the valve stem body part 2013 forms a valve stem contact part 20154, and the first elastic component 204 is accommodated in a space defined by the cylindrical part 2014 and the valve stem body part 2013.

Compared to the third embodiment shown in FIGS. 9a and 9b, which have the same opening state, this embodiment changes the structure of the valve stem unit 201 in terms of division and alignment based on the third embodiment. After assembly, the functions of their geometrically corresponding parts are similar. The structural solution of other parts of this embodiment is the same or similar to the third embodiment.

In this embodiment, some parts of the electric valve may be modified in the usual manner, such as division and alignment, but after assembly, the functions of the geometrically corresponding parts are basically the same. , still belonging to the concept of the invention, for example, the structure of the valve body 202 in FIGS. 8a, 8b has undergone certain changes with respect to the structure of the valve body 202 in the first embodiment of FIGS. 6a, 6b. , essentially does not change the functions of the geometrically corresponding parts, and the structure of these adaptive changes and combinations also falls within the protection scope of the claims of the present invention patent.

Furthermore, in the embodiments of this specification, a washer is attached to the lower end of the first elastic component 204, or a washer is provided between the first valve body abutting portion 202b and the second elastic component 208. Alternatively, a washer may be attached to the upper end of the first elastic component 204, but this does not affect the main content of the present application, and the abutment of the two members of the present application may be avoided. includes direct abutment of the two members or abutment of each member by other members (not limited to washers).

Furthermore, in order to further reduce the frictional resistance of relative rotation on the upper and lower surfaces of the washer or gasket that engage under rotational friction, a coating layer ( Painting or plating, for example with polytetrafluoroethylene, or graphite, or a coating layer containing a molybdenum disulfide component, extends the service life of the motor-operated valve.

"Abutment" as described in this application includes direct abutment of two members, and also includes abutment between two members by another member, that is, indirect abutment.

Based on the above embodiments, according to the core structure of the present invention, some adaptive changes to the attachment of anti-friction washers or gaskets will all fall within the protection scope of the claims of the present invention patent.

In the above embodiment, the third valve body abutting portion 202d of the valve body 202 is brought into contact with the housing 30, and in this case, the housing 30 includes the restricting portion 20d, and of course, the housing 30 includes the housing 30. The connecting part may be welded, and the valve body 202 can abut against the housing connecting part, in which case the member that abuts the valve body 202 is the restriction part 20d. That is, the restriction portion 20d of the present application is a member that can come into contact with the valve body 202, and is not limited to the housing 30.

Here, this solution provides various solutions to the above-mentioned method of forming the valve port 10a and the necessity of installing a joint pipe, etc., and uses the annotation "possible" in the specification. It is difficult to understand that ``possible'' in an application means ``always.''

Here, the directional nouns such as top, bottom, left, right, etc. mentioned in this embodiment are all introduced for the purpose of description based on the drawings in the specification, and the "first" and "second" Ordinal terms such as ``are also introduced for descriptive purposes and not as a limitation to the order of the members.

The above is a detailed introduction to the electric valve provided by the present invention. This specification uses specific examples to describe the principles and embodiments of the invention, and the above description of the examples is only for understanding the central idea of the invention. It will be apparent to those skilled in the art that several improvements and modifications may be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention. do.

10...valve seat member;
101...Valve seat;
102...Nut;
103...first joint pipe section;
104...Second joint pipe section;
10a... valve mouth;
10b...female threaded part;
10c...Fixed stopper part;
10d...first entrance/exit passage;
10e...Second entrance/exit passage;
20... Valve body rotor unit;
201...Valve stem unit;
2011...Valve stem;
2012...Bush;
20121...Bush hole;
2013... Valve stem body part;
2014...Cylindrical parts;
20141 ... Cylindrical component contact part;
201411 ... Cylindrical part through hole part;
2015...Inner wall of valve stem;
20151...First valve shaft inner wall part;
20152 ... step part;
20153...Second valve shaft inner wall part;
20154 ... Valve shaft contact part;
20155...Third valve shaft inner wall part;
2016...outer edge;
20161...first outer edge;
20162 ... second outer edge part;
201a...Male thread part;
201b...Movable stopper part;
201c... Rotor fixing part;
202...valve body;
2021... Valve body body part;
2022... Valve body sleeve;
20221... Valve body sleeve hole;
202a... Valve body head;
202b...first valve body contact part;
202c...Second valve body contact part;
202d...Third valve body contact part;
203...rotor;
204...first elastic component;
206...Abutting member;
206a...first contact part;
206b...second contact part;
206c...Third contact part;
2061...Washer member;
20611...Washer hole;
2062...Abutment holder;
20621 ... Contact holder ceiling part;
20622...Abutting holder side part;
20623...Abutting holder hole;
208...Second elastic component;
20a...Spring contact part;
20b...Restriction part;
30...Housing;
40...Coil.

Claims (12)

The electric valve includes a valve body and a coil (40), the coil (40) is fitted onto the valve body, and the valve body includes a valve seat member (10) and a valve body rotor unit (20). , the valve body rotor unit (20) includes a valve stem unit (201), a valve body (202), a first elastic component (204), an abutment member (206), and a second elastic component (208),
The valve stem unit (201) includes a valve stem abutting part (20154), the second elastic component (208) is supported by the valve stem abutting part (20154),
The valve body (202) has a first valve body abutting portion (202b) that is bored in the valve shaft unit (201) and can come into contact with the upper end of the second elastic component (208). including,
The upper end of the first elastic component (204) is brought into contact with the valve shaft unit (201), the contact member (206) includes a first contact portion (206a), and the first elastic component (204) ) is in contact with the first abutting part (206a), the abutting member (206) includes a second abutting part (206b), and the valve body (202) is in contact with the second abutting part (206b). (206b), and the abutting member (206) includes a third abutting part (202c) that can abut on the valve stem unit (201). 206c),
The valve seat member (10) includes a valve port (10a) that can come into contact with the valve body (202),
The third contact portion (206c) was brought into contact with the valve shaft unit (201), and the first valve body contact portion (202b) was brought into contact with the upper end portion of the second elastic component (208). In the electric valve, the second contact portion (206b) is not in contact with the second valve body contact portion (202c). The contact member (206) includes a washer member (2061), the valve stem inner wall portion (2015) includes a step portion (20152), and the washer member (2061) ) and includes the first contact portion (206a), the washer member (2061) is capable of contacting the second valve body contact portion (202c), and includes the first contact portion (206a). 1 . The washer member ( 2061 ) includes a contact portion ( 206 b ), the washer member ( 2061 ) is capable of contacting the step portion ( 20152 ), and includes the third contact portion ( 206 c ). Electric valve described in. The washer member (2061) further includes a washer hole (201611), and the valve body (202) passes through the washer hole (201611) and the first elastic component (204). The electric valve according to claim 2. The abutment member (206) includes an abutment holder (2062), the abutment holder (2062) includes an abutment holder ceiling part (20621) and an abutment holder side part (20622), and the abutment holder ceiling The part (20621) is in contact with the first elastic component (204) and includes the first contact part (206a), and the contact holder ceiling part (20621) is in contact with the second valve body part (20621). The contact holder ceiling part (20621) includes the second contact part (206b), and the contact holder side part (20622) can contact the valve shaft unit (2062c). 201), and includes the third contact portion (206c). The motor-operated valve according to claim 4, wherein the abutting holder side portion (20622) can abut the valve shaft abutting portion (20154). The abutment holder (2062) includes an abutment holder hole (20623), and the valve body (202) passes through the abutment holder hole (20623) and the first elastic component (204). The motor-operated valve according to claim 4 or 5, wherein: The valve body (202) further includes a valve body (2021) and a valve sleeve (2022), the valve sleeve (2022) includes a valve sleeve hole (20221), and the valve body (2022) further includes a valve body (2021) and a valve sleeve (2022). 2021) is located in the valve sleeve hole (20221), and the valve body (2021) is fixedly connected to the valve sleeve (2022). The electric valve according to any one of items 6 to 6. The valve body sleeve (2022) can come into contact with the upper end of the second elastic component (208), and the valve body sleeve (2022) includes the first valve body abutting portion (202b), The electric valve according to claim 7, wherein the valve body sleeve (2022) includes the second valve body contact portion (202c), and the valve body sleeve (2022) is capable of contacting the second valve body contact portion (206b). . The valve stem unit (201) includes a valve stem (2011) and a bush (2012), the bush (2012) is fixedly connected to the valve stem (2011), and the first elastic component (204) According to any one of claims 1 to 5, the valve body (202) is in contact with a bushing hole (20121) and includes a bushing hole (20121), and the valve body (202) passes through the bushing hole (20121). electric valve. The valve stem unit (201) includes a valve stem body (2013) and a cylindrical part (2014), the valve stem body (2013) is fixedly connected to the cylindrical part (2014), and the valve stem body (2013) is fixedly connected to the cylindrical part (2014). The shaped part (2014) includes a cylindrical part abutting part (20141) that comes into contact with the first elastic part (204), and the cylindrical part (2014) further includes a cylindrical part through-hole part (201411). The motor-operated valve according to any one of claims 1 to 5, wherein the valve body (202) passes through the cylindrical component through-hole (201411). The electric valve includes a restriction part (20b) and a housing (30), the valve body (202) includes a third valve body abutting part (202d) that can come into contact with the housing (30), and the housing The electric valve according to claim 10 or 11, wherein (30) includes the restriction portion (20b). The electric valve includes a restriction part (20b), a housing (30) and a housing connection part, the housing connection part is fixedly connected to the housing (30), and the valve body (202) is connected to the housing connection part. The motor-operated valve according to claim 10 or 11, characterized in that it includes a third valve body abutting part (202d) that can be brought into contact with it, and the housing connection part includes the limiting part (20d).

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