Motor-operated valve

Abstract

The motor-operated valve includes a valve seat (100), a spindle (200), a first valve core (310), and a second valve core (320), the valve seat having a valve chamber (110), the spindle being movably mounted in the valve chamber, the first valve core being mounted in the valve chamber and having a first through hole (311) and made of a non-metallic material, the first valve core being located between the spindle and an opening of the valve chamber, the second valve core being mounted in the valve chamber and having a second through hole (321) and made of a metallic material, the second valve core being mounted adjacent to one side of the first valve core facing the spindle, the second through hole and the first through hole together forming a valve port, and in a fully closed state, the spindle passes through the second through hole and comes into contact with a wall of the first through hole to form a seal.

Description

[Technical Field]

[0001] Related Applications This disclosure claims priority to Chinese application "Motor-Operated Valve," filed on December 2, 2021, with application number 202111457357.9, the entire contents of which are incorporated herein by reference.

[0002] The present disclosure relates to the technical field of motorized valves, and more particularly to motorized valves. [Background technology]

[0003] In order to avoid the problem of valve port leakage, conventional motor-operated valves usually use soft sealing to seal the valve port, but due to the above design, the valve core of the conventional motor-operated valve has the disadvantage that it is difficult to adjust the flow rate with the soft-sealed valve port and is difficult to process. Summary of the Invention

[0004] According to one aspect of the present disclosure, there is provided an electrically operated valve including a valve seat, a spindle, a first valve core, and a second valve core, wherein the valve seat has a valve chamber, the spindle is movably installed in the valve chamber, the first valve core is installed in the valve chamber and has a first through-hole and is made of a non-metallic material, the first valve core is located between the spindle and an opening of the valve chamber, the second valve core is installed in the valve chamber and has a second through-hole and is made of a metallic material, the second valve core is installed adjacent to one side of the first valve core facing the spindle, the second through-hole and the first through-hole together form a valve port, and in a fully closed state, the spindle passes through the second through-hole and comes into contact with the wall of the first through-hole to form a seal. [Brief explanation of the drawings]

[0005] [Figure 1] 1 is an exploded schematic diagram of a motorized valve according to one exemplary embodiment; [Figure 2] FIG. 2 is a cross-sectional view of the motor-operated valve shown in FIG. [Figure 3] 3 is an enlarged schematic cross-sectional view of a partial structure of the motor-operated valve shown in FIG. 2. [Figure 4] FIG. 4 is an exploded schematic view of the partial structure shown in FIG. 3. [Figure 5] FIG. 4 is an enlarged schematic view of part A in FIG. 3. DETAILED DESCRIPTION OF THE INVENTION

[0006] Next, exemplary embodiments will be described more fully with reference to the drawings. However, the exemplary embodiments can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Rather, the presentation of these embodiments will make this disclosure thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings indicate the same or similar components, and therefore detailed descriptions thereof will be omitted.

[0007] Referring to Figure 1, a three-dimensional exploded schematic diagram of the motor-operated valve proposed in the present disclosure is shown. In an exemplary embodiment, the motor-operated valve proposed in the present disclosure is described as an electronic expansion valve. Those skilled in the art will easily understand that even if various modifications, additions, substitutions, deletions, or other changes are made to the specific embodiments below in order to apply the related designs of the present disclosure to other types of motor-operated valves or other valve devices, these changes will still fall within the scope of the principles of the motor-operated valve proposed in the present disclosure.

[0008] As shown in Fig. 1, in this embodiment, the motor-operated valve proposed in the present disclosure includes a valve seat 100, a spindle 200, a first valve core 310, and a second valve core 320. Referring to Figs. 2 to 5, Fig. 2 representatively shows a cross-sectional view of a motor-operated valve that can embody the principles of the present disclosure, Fig. 3 representatively shows an enlarged cross-sectional view of a partial structure of a motor-operated valve that can embody the principles of the present disclosure, Fig. 4 representatively shows an exploded view of the partial structure shown in Fig. 3, and Fig. 5 representatively shows an enlarged view of part A in Fig. 3. Hereinafter, the structure, connection method, and functional relationship of each of the main components of the motor-operated valve proposed in the present disclosure will be described in detail with reference to the above drawings.

[0009] As shown in FIGS. 1 to 5 , in this embodiment, the valve seat 100 has a valve chamber 110. The spindle 200 is movably installed in the valve chamber 110 and can be driven by a driving mechanism to move the spindle 200 along the axial direction X of the valve seat 100. The first valve core 310 is installed in the valve chamber 110 and has a first through-hole 311. The first valve core 310 is made of a non-metallic material and is located between the spindle 200 and the opening of the valve chamber 110. The second valve core 320 is installed in the valve chamber 110 and has a second through-hole 321. The second valve core 320 is made of a metallic material and is installed adjacent to one side of the first valve core 310 facing the spindle 200. The second through-hole 321 and the first through-hole 311 together form a valve port of the motor-operated valve. Thus, when the motor-operated valve is in a fully closed state, the spindle 200 passes through the second through-hole 321 and contacts the wall of the first through-hole 311 to form a seal. In the present disclosure, the valve port is formed using a design in which the first valve core 310 and the second valve core 320 are interconnected. By selecting a non-metallic material for the first valve core 310, flexible contact between the spindle 200 and the first valve core 310 can be achieved when the first valve core 310 and the spindle 200 come into contact, thereby ensuring a good seal between the spindle 200 and the valve port. By selecting a metallic material for the second valve core 320, the second valve core 320 can be easily machined into a desired shape to meet the flow rate adjustment requirements, further improving the adjustment precision of the motor-operated valve.

[0010] Specifically, as shown in Figures 2, 3 and 5, in this embodiment, the inner diameter of the port of the valve port facing the spindle 200 may be larger than the inner diameter of the port of the valve port facing away from the spindle 200. Based on this, the inner wall of the valve port can smoothly transition between the two ports, and the smooth transition can prevent the flow rate from changing suddenly when the valve is opened or closed.

[0011] 5, based on the above design of the valve port, in this embodiment, the inner wall of the second through-hole 321 may have a generally inclined surface shape, i.e., the cross-sectional shape of the flow regulating segment of the valve port has a generally oblique line shape. In some embodiments, the inner wall of the valve port may have other smoothly transitional structures, such as, but not limited to, a generally arcuate surface shape, i.e., the cross-sectional shape of the valve port has a generally curved line shape.

[0012] In some embodiments, the inner wall of the second through hole 321 includes a multi-step inclined surface with different inclinations or a multi-step arc surface with different degrees of arc to meet the requirements of different flow rate curves.

[0013] 5, based on the above design of the valve port, in this embodiment, the inner diameter of the opening of the first through-hole 311 facing the spindle 200 may be equal to the inner diameter of the opening of the second through-hole 321 facing away from the spindle 200. In some embodiments, the inner diameter of the opening of the first through-hole 311 facing toward the spindle 200 may be slightly smaller than the inner diameter of the opening of the second through-hole 321 facing away from the spindle 200, but is not limited thereto.

[0014] 5, based on the above design of the valve port, in this embodiment, the inner diameter of the opening of the first through-hole 311 facing the spindle 200 may be larger than the inner diameter of the opening facing away from the spindle 200. Based on this, the wall of the first through-hole 311 can smoothly transition between the two openings.

[0015] 5, based on the above design of the first through hole 311, in this embodiment, the inner wall of the first through hole 311 may have a substantially inclined surface shape, i.e., the cross-sectional shape of the first through hole 311 has a substantially oblique line shape. In some embodiments, the inner wall of the first through hole 311 may have other smoothly transitional structures, for example, a substantially arcuate surface shape, i.e., the cross-sectional shape of the first through hole 311 has a substantially curved shape, but is not limited thereto.

[0016] 5, based on the above design of the valve port, in this embodiment, the inner diameter of the opening of the second through-hole 321 facing the spindle 200 may be larger than the inner diameter of the opening facing away from the spindle 200. Based on this, the wall of the second through-hole 321 can smoothly transition between the two openings.

[0017] 5, based on the above-described design of the second through hole 321, in this embodiment, the inner wall of the second through hole 321 may have a substantially inclined surface shape, i.e., the cross-sectional shape of the second through hole 321 has a substantially oblique line shape. In some embodiments, the inner wall of the second through hole 321 may have other smoothly transitional structures, such as, but not limited to, a substantially arcuate surface shape, i.e., the cross-sectional shape of the second through hole 321 has a substantially curved line shape.

[0018] Optionally, as shown in Figures 1, 4, and 5, in this embodiment, the thickness of the first valve core 310 along the axial direction X of the valve seat 100 may be greater than the thickness of the second valve core 320. In some embodiments, the thickness of the first valve core 310 may be equal to or slightly smaller than the thickness of the second valve core 320, but is not limited thereto and can be flexibly adjusted according to sealing requirements and flow control requirements.

[0019] Optionally, as shown in FIG. 5, in this embodiment, the first valve core 310 may have a first annular groove 312 formed on the periphery of the opening of the first through-hole 311 on one side facing away from the spindle 200.

[0020] Optionally, as shown in FIG. 5, in this embodiment, the second valve core 320 may have a second annular groove 322 formed on the periphery of the opening of the second through hole 321 on one side facing the spindle 200.

[0021] Optionally, in this embodiment, the material of the first valve core 310 may be PTFE. In some embodiments, the material of the first valve core 310 may be other non-metallic materials, such as, but not limited to, PPS, PEAK, or nylon.

[0022] Optionally, in this embodiment, the material of the second valve core 320 may be stainless steel or aluminum.

[0023] Optionally, as shown in Figures 1 to 4, in this embodiment, the motor-operated valve proposed in the present disclosure may further include a valve core sleeve 400. Specifically, the valve core sleeve 400 is partially installed in the valve chamber 110, and is installed adjacent to one side of the first valve core 310 facing away from the spindle 200. Here, the valve core sleeve 400 has a passage extending through both ends thereof in the axial direction X, and the passage communicates with the valve port formed by the first through-hole 311 and the second through-hole 321, specifically, the passage communicates with the port of the first through-hole 311 on one side facing away from the spindle 200.

[0024] As shown in FIG. 2, in this embodiment, a flow hole 120 is provided in the valve seat 100 .

[0025] As shown in FIG. 2, in this embodiment, the motor-operated valve further includes a mounting base 510 and a socket 520. The mounting base 510 has a mounting chamber in which the valve seat 100, the first valve core 310, the second valve core 320, and the valve core sleeve 400 are mounted and removably connected to the mounting chamber.

[0026] 2 , in this embodiment, the drive mechanism includes a rotor assembly 610 installed in the socket 520, and a nut assembly 620. The rotor assembly 610 is fitted onto the outside of the nut assembly 620, and one end of the screw 630 remote from the spindle 200 is fixedly connected to the rotor assembly 610. The rotor assembly 610 moves the spindle 200 in the axial direction X in conjunction with the screw 630, thereby adjusting the opening of the valve port. The nut assembly 620 has an internal thread that is screwed onto the spindle 200, and the nut assembly 620 is fixedly connected to the valve seat 100.

[0027] 2, in this embodiment, the motor-operated valve further includes a screw 630, a spring sleeve 640, a spring 650, and a rotating member 660 (e.g., a bearing). One end of the spring sleeve 640 is fitted to the end of the spindle 200. The spring 650 is mounted within the spring sleeve 640, and the spring sleeve 640 has a balancing hole 641. The screw 630 is installed at the other end of the spring sleeve 640, and a bearing is fitted to the screw 630 and located between the screw 630 and the spring sleeve 640. A bearing is installed between the screw 630 and the spring sleeve 640. Because a soft seal is formed between the first valve core 310 and the valve seat 100, the friction force between the first valve core 310 and the screw 630 is smaller than the friction force between the valve core and the valve seat 100, and wear problems of the soft-sealed valve port are avoided.

[0028] As shown in FIG. 2, in this embodiment, an equalizing passage 210 is provided within the spindle 200 to balance the pressure at both ends of the spindle 200. The equalizing passage 210 includes a first segment adjacent to the spring sleeve 640 and a second segment adjacent to the valve port. The inner diameter of the second segment is larger than that of the first segment and is used for closing the valve for high-flow flow.

[0029] In summary, the motor-operated valve proposed in this disclosure uses a design in which the first and second valve cores are interconnected to form the valve port, and by selecting a non-metallic material for the first valve core, it is possible to ensure soft contact between the spindle and the first valve core when the first valve core comes into contact with the spindle, thereby ensuring good sealing between the spindle and the valve port. Based on this, by selecting a metallic material for the second valve core, the second valve core can be made to meet the flow rate regulation requirements by taking advantage of the fact that metallic materials are not easily affected by environmental factors such as temperature, and this can further improve the regulation accuracy of the motor-operated valve.

[0030] While the present disclosure has been described with reference to several exemplary embodiments, it should be understood that the terms used are for purposes of description and illustration, and not of limitation. Since the present disclosure can be specifically embodied in various forms without departing from the spirit or essence of the disclosure, the above-described embodiments should not be limited to any of the details set forth above, but should be broadly construed within the spirit and scope defined by the appended claims, and therefore, it should be understood that all changes and modifications that come within the scope of the claims or equivalents thereof should be covered by the appended claims.

Claims

1. A valve seat having a valve chamber; a spindle movably installed in the valve chamber; a first valve core disposed in the valve chamber, having a first through hole and made of a non-metallic material, and positioned between the spindle and the opening of the valve chamber; a second valve core, which is disposed in the valve chamber and has a second through-hole made of a metallic material, and which is disposed adjacent to one side of the first valve core facing the spindle, and the second through-hole and the first through-hole together form a valve port; In a fully closed state, the spindle passes through the second through-hole and contacts the wall of the first through-hole to form a tight seal; The first valve core has a first annular groove formed on the periphery of the opening of the first through hole on one side facing away from the spindle.

2. A valve seat having a valve chamber; a spindle movably installed in the valve chamber; a first valve core disposed in the valve chamber, having a first through hole and made of a non-metallic material, and positioned between the spindle and the opening of the valve chamber; a second valve core, which is disposed in the valve chamber and has a second through-hole made of a metallic material, and which is disposed adjacent to one side of the first valve core facing the spindle, and the second through-hole and the first through-hole together form a valve port; In a fully closed state, the spindle passes through the second through-hole and contacts the wall of the first through-hole to form a tight seal; The second valve core has a second annular groove formed on the periphery of the opening of the second through hole on one side facing the spindle.

3. The inner diameter of the port of the valve port facing the spindle is larger than the inner diameter of the port facing away from the spindle; and 3. The motor-operated valve according to claim 1, wherein the inner wall of the valve orifice has a smooth transition between the two ports.

4. 4. The motor-operated valve according to claim 3, wherein an inner diameter of the opening of the first through-hole facing the spindle is equal to or smaller than an inner diameter of the opening of the second through-hole facing away from the spindle.

5. The inner diameter of the opening of the first through hole facing the spindle is larger than the inner diameter of the opening facing away from the spindle, and The motor-operated valve according to claim 3 , wherein the wall of the first through-hole has a smooth transition between the two openings.

6. The inner diameter of the opening of the second through hole facing the spindle is larger than the inner diameter of the opening facing away from the spindle, and The motor-operated valve according to claim 3 , wherein the wall of the second through-hole has a smooth transition between the two openings.

7. The motor-operated valve according to claim 3 , wherein an inner wall of the second through hole has an inclined surface or an arcuate surface.

8. The motor-operated valve according to claim 7 , wherein the inner wall of the second through hole includes a multi-stage inclined surface having different inclinations or a multi-stage arc surface having different degrees of arc.

9. The valve core further includes a valve core sleeve partially disposed in the valve chamber and disposed adjacent to one side of the first valve core facing away from the spindle, The valve core sleeve has a through passage, The motor-operated valve according to claim 1 or 2, wherein the passage is in communication with the valve port.

10. Further comprising a mounting base; The mounting base includes a mounting chamber; The motor-operated valve according to claim 9 , wherein the valve seat, the first valve core, the second valve core, and the valve core sleeve are mounted in the mounting chamber and are removably connected to the mounting chamber.

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