Electric air valve

Abstract

The electric air valve comprises a valve body assembly and a valve plate assembly, the valve body assembly is provided with a valve port, the valve plate assembly is arranged at the valve port, the valve plate assembly comprises a rotating shaft, a valve plate and a first reinforcing piece, the two ends of the rotating shaft are arranged on the side wall forming the valve port in a penetrating mode, and the rotating shaft is attached to the valve plate; the first reinforcing piece covers the periphery of the rotating shaft and abuts against the valve plate, and the first reinforcing piece, the rotating shaft and the valve plate are fixedly connected. In the radial direction of the rotating shaft, part of the outer wall of the first reinforcing piece forms an air guide face on the left side and the right side of the rotating shaft respectively, one end of each air guide face extends to the top of the rotating shaft, the other end of each air guide face extends to the surface of the valve plate, and an included angle beta is formed between the air guide faces and the surface of the valve plate and is larger than 90 degrees and smaller than 180 degrees.

Description

Technical Field

[0001] The present application relates to the technical field of valves, and particularly to an electric air valve. Background Art

[0002] An electric air valve is a valve used to adjust the flow rate of air or cut off the air flow. For example, a common electric air valve is installed at the outlet of the cooling fan of the control rod drive mechanism in a nuclear power plant. The electric air valve includes a valve body assembly, a valve plate, and a rotating shaft. Among them, the valve body assembly has a valve port. The valve plate is driven by the rotating shaft to rotate to open the valve port, so that air can flow through the valve port to maintain the temperature required for the normal operation of the control rod drive mechanism; or, the valve plate is driven by the rotating shaft to rotate to close the valve port, so that air cannot flow through the valve port.

[0003] In order to improve the structural strength of the connection position between the rotating shaft and the valve plate on the valve plate, usually, a reinforcing member is also provided at the connection between the rotating shaft and the valve plate. However, since the known reinforcing member is disposed protruding from the surface of the valve plate, when the valve plate rotates to open the valve port, the reinforcing member will generate a relatively large resistance to the air flowing through the valve port, and further cause a large pressure drop in the electric air valve. How to minimize the resistance generated by the reinforcing member to the air flowing through the valve port when the reinforcing member protrudes from the surface of the valve plate is a technical problem to be solved. Summary of the Utility Model

[0004] Based on this, it is necessary to provide an electric air valve to improve the structural strength of the connection position between the rotating shaft and the valve plate on the valve plate and also reduce the resistance generated by the reinforcing member to the air flowing through the valve port.

[0005] An electric air valve includes a valve body assembly and a valve plate assembly. The valve body assembly has a valve port. The valve plate assembly is installed at the valve port. The valve plate assembly includes a rotating shaft, a valve plate, and a first reinforcing member. The two ends of the rotating shaft respectively pass through the side walls forming the valve port. The rotating shaft is attached to the valve plate. The first reinforcing member covers the outer periphery of the rotating shaft and abuts against the valve plate. And the first reinforcing member, the rotating shaft, and the valve plate are fixedly connected; along the radial direction of the rotating shaft, part of the outer wall of the first reinforcing member forms a wind guiding surface on the left and right sides of the rotating shaft respectively. One end of the wind guiding surface extends to the top of the rotating shaft, and the other end extends to the surface of the valve plate. And an included angle β is formed between the wind guiding surface and the valve plate surface, and 90° < β < 180°.

[0006] In one embodiment, 135° ≤ β ≤ 145°.

[0007] In one embodiment, the first reinforcing member includes a connecting plate and support plates respectively connected to both sides of the connecting plate. The connecting plate connects the rotating shaft and the valve plate. The end of the support plate away from the connecting plate abuts against the valve plate. And the cross section of the first reinforcing member is trapezoidal, and the outer wall of each support plate forms a wind guiding surface.

[0008] In one embodiment, the valve plate assembly further includes a second reinforcing member, which is disposed on the valve plate, and the second reinforcing member and the first reinforcing member are respectively located on two opposite sides of the valve plate; and, the projection of the second reinforcing member on the valve plate intersects with the projection of the rotating shaft on the valve plate.

[0009] In one embodiment, the rotating shaft extends along the radial direction of the valve plate, and, the projection of the second reinforcing member on the valve plate is symmetrically arranged with respect to the projection of the rotating shaft on the valve plate as the axis of symmetry.

[0010] In one embodiment, the number of the second reinforcing members is one, and this second reinforcing member extends along the radial direction of the valve plate; or, the number of the second reinforcing members is multiple, and the multiple second reinforcing members are arranged at intervals along the axial direction of the rotating shaft.

[0011] In one embodiment, the number of the second reinforcing members is one, and this second reinforcing member extends along the radial direction of the valve plate; the diameter of the valve plate is D, and the length of the first reinforcing member is L 1 , and the length of the second reinforcing member is L 2 , and, 0.8D ≤ L 1 ≤ 0.92D, 0.8D ≤ L 2 ≤ 0.92D.

[0012] In one embodiment, the cross section of the second reinforcing member is rectangular, the cross section height of the second reinforcing member is h 1 , the cross section height of the first reinforcing member is h 2 , the cross section width of the second reinforcing member is h 3 , and, h 1 =h 2 , 2.5h 1 ≤ h 3 ≤ 5h 1 .

[0013] In one embodiment, the valve body assembly includes a cylinder body and a valve seat disposed on the inner peripheral wall of the cylinder body. The valve seat extends along the circumferential direction of the cylinder body and encloses to form a valve port. The side of the valve seat relatively far from the inner peripheral wall of the cylinder body is configured as a sealing surface. The valve plate assembly further includes a sealing member, which extends along the circumferential direction of the valve plate and is connected to the valve plate; along the radial direction of the valve plate, the outer ring of the sealing member extends out of the valve plate and is used for sealing cooperation with the sealing surface, and, an included angle α is formed between the sealing surface and the axis of the valve port, and 3.3° ≤ α ≤ 4.3°.

[0014] In one embodiment, the valve plate assembly further includes a pressing ring and a fastener. Along the thickness direction of the valve plate, at least part of the sealing member is clamped between the pressing ring and the valve plate, and, the valve plate, the sealing member and the pressing ring are connected by the fastener.

[0015] In one embodiment, the electric air valve further includes a driving motor. The valve body assembly includes a cylinder, a first bracket, and a second bracket. The valve plate assembly is rotatably installed inside the cylinder. The driving motor is fixedly installed outside the cylinder through the first bracket, and one end of the rotating shaft sequentially passes through the cylinder and the first bracket and is drivingly connected to the output shaft of the driving motor. One end of the second bracket is fixedly connected to the cylinder, and the other end is fixedly connected to the outer periphery of the driving motor.

[0016] In one embodiment, an elastic reset member is provided inside the driving motor. When the driving motor is powered on, the output shaft of the driving motor drives the rotating shaft to rotate, causing the elastic reset member to accumulate elastic potential energy, so that when the driving motor is powered off, the elastic reset member can drive the rotating shaft to rotate to open the valve port.

[0017] Compared with the prior art, for the electric air valve provided in this application, by providing a first strengthening member that covers the outer periphery of the rotating shaft and abuts against the valve plate, the first strengthening member can strengthen the valve plate along the extension direction of the rotating shaft, thereby improving the structural strength of the valve plate assembly. Moreover, by forming a wind guiding surface on each of the left and right sides of the rotating shaft by a part of the outer wall of the first strengthening member, when the rotating shaft rotates around its own axis to the left or right to open the valve port, the windward slope formed by the wind guiding surface is relatively gentler, so as to play a role in guiding the air flow, which is beneficial to reducing the wind resistance generated by the first strengthening member on the air flow, and thus beneficial to reducing the pressure drop of the electric air valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 Isometric view of the electric air valve provided by the present application Figure 1 ;

[0020] Figure 2 Isometric view of the electric air valve provided by the present application Figure 2 ;

[0021] Figure 3 Is the top view of the electric air valve provided by the present application;

[0022] Figure 4 Is Figure 3 The cross-sectional view at A-A;

[0023] Figure 5 Is Figure 3 The cross-sectional view at B-B;

[0024] Figure 6 A partial cross-sectional view of the electric air valve provided by this application along the radial direction of the valve port.

[0025] Reference numerals: 100, electric air valve; 10, valve body assembly; 11, valve port; 111, valve seat; 112, sealing surface; 12, cylinder; 121, connecting flange; 131, first bracket; 132, second bracket; 14, junction box mounting bracket; 20, valve plate assembly; 21, rotating shaft; 22, valve plate; 23, first reinforcing member; 231, air guiding surface; 232, connecting plate; 233, supporting plate; 24, second reinforcing member; 25, seal; 26, pressing ring; 30, driving motor; 31, junction box; 40, bolt; 50, positioning sleeve. Detailed implementation manners

[0026] To make the above objects, features, and advantages of this application more obvious and understandable, the following will describe the detailed implementation manners of this application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand this application. However, this application can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of this application. Therefore, this application is not limited by the specific embodiments disclosed below.

[0027] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the description of this application are only for the purpose of illustration and do not represent the only implementation manner.

[0028] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0029] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first feature is in direct contact with the second feature, or the first feature is in indirect contact with the second feature through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or diagonally above the second feature, or it only means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or diagonally below the second feature, or it only means that the horizontal height of the first feature is lower than that of the second feature.

[0030] Unless otherwise defined, all technical and scientific terms used in the description of this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the description of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the description of this application includes any and all combinations of one or more of the related listed items.

[0031] An electric air valve is a valve used to adjust the flow rate of air or cut off the air flow. For example, a common electric air valve is installed at the outlet of the cooling fan of the control rod drive mechanism in a nuclear power plant. The electric air valve includes a valve body assembly, a valve plate and a rotating shaft. Among them, the valve body assembly has a valve port, and the valve plate is rotatably connected to the valve port through the rotating shaft. By driving the valve plate to rotate to open the valve port, air can flow through the valve port to maintain the temperature required for the normal operation of the control rod drive mechanism; or, by driving the valve plate to rotate to close the valve port, air cannot flow through the valve port.

[0032] To improve the structural strength of the connection position between the rotating shaft and the valve plate on the valve plate, usually, a reinforcing member is also provided at the connection between the rotating shaft and the valve plate. However, since the reinforcing member is provided protruding from the surface of the valve plate, when the valve plate rotates to open the valve port, the reinforcing member will generate a relatively large resistance to the air flowing through the valve port, thereby causing a relatively large pressure drop in the electric air valve.

[0033] Please refer to Figures 1 to 6, To solve the above problems, the present application provides an electric air valve 100, which includes a valve body assembly 10 and a valve plate assembly 20. The valve body assembly 10 has a valve port 11, and the valve plate assembly 20 is installed at the valve port 11. The valve plate assembly 20 includes a rotating shaft 21, a valve plate 22, and a first reinforcing member 23. Both ends of the rotating shaft 21 are respectively inserted through the side walls forming the valve port 11. The rotating shaft 21 is attached to one side surface of the valve plate 22. The first reinforcing member 23 covers the outer periphery of the rotating shaft 21 and abuts against the valve plate 22, and the first reinforcing member 23, the rotating shaft 21, and the valve plate 22 are fixedly connected. Along the radial direction of the rotating shaft 21, a part of the outer wall of the first reinforcing member 23 forms a wind guiding surface 231 on the left and right sides of the rotating shaft 21 respectively. One end of the wind guiding surface 231 extends to the top of the rotating shaft 21, and the other end extends to the surface of the valve plate 22. And an included angle β is formed between the wind guiding surface 231 and the surface of the valve plate 22, and 90° < β < 180°.

[0034] It can be understood that by arranging the first reinforcing member 23 to cover the outer periphery of the rotating shaft 21 and abut against the valve plate 22, the first reinforcing member 23 can strengthen the valve plate 22 along the extending direction of the rotating shaft 21, thereby improving the structural strength of the valve plate assembly 20. And, by forming a wind guiding surface 231 on the left and right sides of the rotating shaft 21 respectively with a part of the outer wall of the first reinforcing member 23, when the rotating shaft 21 rotates around its own axis to the left to open the valve port 11 or rotates to the right to open the valve port 11, the windward slope formed by the wind guiding surface 231 is relatively gentler, so as to play a role in guiding the air flow, which is beneficial to reducing the wind resistance generated by the first reinforcing member 23 on the air flow, and thus beneficial to reducing the pressure drop of the electric air valve 100.

[0035] Further, 135° ≤ β ≤ 145°. It can be understood that the larger β is, the smaller the wind resistance to the air flow is, but at the same time, it will also cause the supporting effect of the first reinforcing member 23 on the valve plate 22 to decrease. By setting 135° ≤ β ≤ 145°, it can reduce the wind resistance generated on the air flow while ensuring the supporting effect of the first reinforcing member 23 on the valve plate 22. For example, the value of β can be 135°, 137°, 140°, 140.5°, 145°, etc., and can be specifically selected according to actual needs.

[0036] Exemplarily, in one embodiment, as Figure 3 and Figure 4 shown, both the rotating shaft 21 and the first reinforcing member 23 extend along the radial direction of the valve plate 22. The first reinforcing member 23, the rotating shaft 21 and the valve plate 22 are connected together by bolts 40. Among them, when the valve plate 22 rotates with the rotating shaft 21 to be parallel to the axis of the valve port 11, the valve port 11 is fully open; when the valve plate 22 rotates with the rotating shaft 21 to be parallel to the plane where the valve port is located, the valve port 11 is closed.

[0037] Optionally, in one embodiment, as Figure 4As shown in the figure, the first reinforcing member 23 includes a connecting plate 232 and support plates 233 respectively connected to both sides of the connecting plate 232. The connecting plate 232 is connected to the rotating shaft 21 and the valve plate 22. The end of the support plate 233 away from the connecting plate 232 abuts against the valve plate 22. And the cross-section of the first reinforcing member 23 is trapezoidal, and the outer wall of each support plate 233 constitutes a wind guiding surface 231. That is, in this embodiment, the connecting plate 232 is configured as a flat plate parallel to the valve plate 22, and the first reinforcing member 23 forms a wind guiding surface 231 on each of the left and right sides of the axis of the rotating shaft 21, so as to ensure that when the rotating shaft 21 rotates around its own axis to the left to open the valve port 11 or rotates to the right to open the valve port 11, there is a wind guiding surface 231 to guide the air flow through the valve port 11. Specifically, the first reinforcing member 23 is configured as a trapezoidal channel steel.

[0038] Furthermore, the cross-section of the first reinforcing member 23 is an isosceles trapezoid. In this way, the two support plates 233 form the same supporting effect on the left and right sides of the axis of the rotating shaft 21, so that the force on the valve plate 22 is more uniform. And the two wind guiding surfaces 231 on the two support plates 233 have the same guiding effect on the air flow.

[0039] However, it is not limited thereto. In other embodiments, the connecting plate 232 may also be configured as an arc plate that fits the outer wall of the rotating shaft 21.

[0040] Please continue to refer to Figures 1 to 5 , the valve plate assembly 20 further includes a second reinforcing member 24. The second reinforcing member 24 is installed on the valve plate 22, and the second reinforcing member 24 and the first reinforcing member 23 are located on two opposite sides of the valve plate 22 respectively. And the projection of the second reinforcing member 24 on the valve plate 22 intersects with the projection of the rotating shaft 21 on the valve plate 22. In this way, both sides of the valve plate 22 are strengthened, and the first reinforcing member 23 and the second reinforcing member 24 form an intersection in space, which can also improve the overall structural strength of the valve plate assembly 20.

[0041] Furthermore, the rotating shaft 21 extends along the radial direction of the valve plate 22, and the projection of the second reinforcing member 24 on the valve plate 22 is symmetrically arranged with respect to the projection of the rotating shaft 21 on the valve plate 22 as the axis of symmetry. In this way, while improving the structural strength of the valve plate assembly 20, it can ensure that the center of gravity of the valve plate assembly 20 is located on the rotating shaft 21, so that the valve plate 22 can rotate more smoothly around the rotating shaft 21.

[0042] Exemplarily, in one embodiment, the number of the second reinforcing members 24 is one, and this second reinforcing member 24 extends along the radial direction of the valve plate 22. In this way, the center of gravity of the valve plate assembly 20 is located at the center of the valve plate 22.

[0043] Furthermore, the diameter of the valve plate 22 is D, and the length of the first reinforcing member 23 is L 1, the length of the second reinforcing member 24 is L 2 , and, 0.8D ≤ L 1 ≤ 0.92D, 0.8D ≤ L 2 ≤ 0.92D. It can be understood that the larger the value of L 1 , the better the reinforcing effect on the valve plate 22, but at the same time, it will increase the wind resistance when opening the valve, resulting in an increase in pressure drop. By setting 0.8D ≤ L 1 ≤ 0.92D, while ensuring the reinforcing effect on the valve plate 22, it can also avoid increasing the wind resistance when opening the valve. For example, L 1 can take values such as 0.8D, 0.88D, 0.9D, 0.92D, etc. The larger the value of L 2 , the better the reinforcing effect on the valve plate 22, but at the same time, it will increase the overall weight of the valve plate assembly 20. By setting 0.8D ≤ L 2 ≤ 0.92D, while ensuring the reinforcing effect on the valve plate 22, it is beneficial to lighten the weight of the valve plate assembly 20. For example, L 2 can take values such as 0.8D, 0.88D, 0.9D, 0.92D, etc.

[0044] In another embodiment, the number of the second reinforcing members 24 can also be configured as multiple. Each second reinforcing member is perpendicular to the rotating shaft 21 respectively, and the multiple second reinforcing members 24 are arranged at equal intervals along the axial direction of the rotating shaft 21.

[0045] In one embodiment, the cross-section of the second reinforcing member 24 is rectangular. Since the second reinforcing member 24 is perpendicular to the rotating shaft 21, when the valve plate 22 rotates around the axis of the rotating shaft 21 to fully open the valve port 11, the cross-section of the second reinforcing member 24 is perpendicular to the flow direction of the air flow. In order to reduce the resistance generated by the second reinforcing member 24 to the air flow, the smaller the cross-sectional area of the second reinforcing member 24, the better. In the case where the height of the second reinforcing member 24 protruding from the surface of the valve plate 22 is the same, in this embodiment, by setting the cross-section of the second reinforcing member 24 as a rectangle, compared with setting the cross-section of the second reinforcing member 24 as a trapezoid, the cross-sectional area of the second reinforcing member 24 can be reduced.

[0046] Specifically, the second reinforcing member 24 is configured as a U-shaped steel channel. Wherein, a positioning sleeve is arranged in the cavity of the U-shaped steel channel. The bolt 40 passes through the U-shaped steel channel and the positioning sleeve 50, and connects the U-shaped steel channel to the valve plate 22.

[0047] Furthermore, the cross-sectional height of the second reinforcing member 24 is h 1 , the cross-sectional height of the first reinforcing member 23 is h 2 , the cross-sectional width of the second reinforcing member 24 is h 3 , and, h 1 = h 2, 2.5h 1 ≤h 3 ≤5h 1 . It can be understood that by setting h 1 = h 2 , it is beneficial to ensure that the rotation center of gravity of the valve plate assembly 20 is close to the rotation shaft 21. And by setting 2.5h 1 ≤h 3 ≤5h 1 , while ensuring the support strength of the second reinforcing member 24 for the valve plate 22, it is also possible to minimize the resistance generated by the second reinforcing member 24 to the air flow.

[0048] The valve body assembly 10 includes a cylinder body 12 and a valve seat 111 provided on the inner peripheral wall of the cylinder body 12. The valve seat 111 extends along the circumferential direction of the cylinder body 12 and encloses to form a valve port 11. One side of the valve seat 111 relatively far from the inner peripheral wall of the cylinder body 12 is configured as a sealing surface 112. The valve plate assembly 20 further includes a seal 25. The seal 25 extends along the circumferential direction of the valve plate 22 and is connected to the valve plate 22. Along the radial direction of the valve plate 22, the outer ring of the seal 25 extends out of the valve plate 22 and is used for sealing cooperation with the sealing surface 112. In this way, the sealing performance of the valve port 11 when closing the valve can be improved.

[0049] Exemplarily, in one embodiment, the valve plate assembly 20 further includes a retaining ring 26 and a fastener. Along the thickness direction of the valve plate 22, at least part of the seal 25 is clamped between the retaining ring 26 and the valve plate 22, and the valve plate 22, the seal 25 and the retaining ring 26 are connected by the fastener. Among them, the fastener can be configured as a bolt 40.

[0050] Optionally, the retaining ring 26 is provided with a plurality of anti-slip grooves on the surface for fitting the seal 25, so as to increase the friction force between the retaining ring 26 and the seal 25, thereby preventing the seal 25 from sliding relative to the retaining ring 26. Similarly, the valve plate 22 is provided with a plurality of anti-slip grooves on the surface for fitting the seal 25, so as to increase the friction force between the valve plate 22 and the seal 25 to prevent the seal 25 from sliding relative to the valve plate 22.

[0051] An angle α is formed between the sealing surface 112 and the axis of the valve port 11, and 3.3° ≤ α ≤ 4.3°.

[0052] In this way, during the closing process of the valve port 11, the seal 25 moves along the inclined sealing surface 112, which is beneficial to reducing the frictional resistance between the seal 25 and the valve seat 111, and further beneficial to reducing the torque of the valve plate assembly 20.

[0053] Such as Figure 1As shown, the electric air valve 100 also includes a drive motor 30, and the valve body assembly 10 includes a cylinder 12, a first bracket 131 and a second bracket 132. Among them, the outer ring of the cylinder 12 is provided with a connecting flange 121. The valve plate assembly 20 is rotatably mounted inside the cylinder 12, and the drive motor 30 is fixedly mounted on the outside of the cylinder 12 through the first bracket 131, and one end of the rotating shaft 21 passes through the cylinder 12 and the first bracket 131 in sequence and is transmission-connected to the output shaft of the drive motor 30, and one end of the second bracket 132 is fixedly connected to the cylinder 12, and the other end is fixedly connected to the outer periphery of the drive motor 30. The first bracket 131 is used to install the drive motor 30. The second bracket 132 plays a supporting role in installing the drive motor 30. Optionally, the second bracket 132 is configured as an L-shaped bent plate.

[0054] The valve body assembly 10 further includes a junction box mounting bracket 14, one end of which is connected to the second bracket 132, and the other end is connected to the outer wall of the cylinder 12, and a triangular structure is formed between the junction box mounting bracket 14, the second bracket 132 and the outer wall of the cylinder 12. The junction box mounting bracket 14 is used to install the junction box 31, and the junction box 31 is electrically connected to the drive motor 30.

[0055] Furthermore, an elastic reset member is provided inside the drive motor. When the drive motor 30 is powered on, the output shaft of the drive motor 30 drives the rotating shaft 21 to rotate so that the elastic reset member accumulates elastic potential energy, so that when the drive motor 30 is powered off, the elastic reset member can drive the rotating shaft 21 to rotate and open the valve port 11. In this way, when the drive motor 30 is powered off, the electric air valve 100 can open the valve port 11 automatically. When the electric air valve is used to be installed at the outlet position of the cooling fan of the control rod drive mechanism of a nuclear power plant, it can ensure that when a power failure occurs in the nuclear power plant, the valve port 11 opens automatically, thereby discharging the heat of the control rod drive mechanism in time. Among them, the elastic reset member is configured as a torsion spring. When the drive motor 30 is powered off, the torsion spring drives the output shaft of the drive motor to rotate, which is a prior art, and the principle will not be repeated here.

[0056] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. An electric air valve, characterized in that: The electric air valve comprises a valve body assembly (10) and a valve plate assembly (20), wherein the valve body assembly (10) has a valve port (11), the valve plate assembly (20) is mounted at the valve port (11), and the valve plate assembly (20) comprises a rotating shaft (21), a valve plate (22) and a first reinforcing member (23), wherein both ends of the rotating shaft (21) are respectively penetrated through a side wall forming the valve port (11), the rotating shaft (21) is attached to the valve plate (22), the first reinforcing member (23) is covered on the outer periphery of the rotating shaft (21) and abuts against the valve plate (22), and the first reinforcing member (23), the rotating shaft (21) and the valve plate (22) are fixedly connected; Along the radial direction of the rotating shaft (21), a portion of the outer wall of the first reinforcement member (23) forms an air guide surface (231) on the left and right sides of the rotating shaft (21), respectively; one end of the air guide surface (231) extends to the top of the rotating shaft (21), and the other end extends to the surface of the valve plate (22); and an angle β is formed between the air guide surface (231) and the surface of the valve plate (22), and 90°<β<180°.

2. The electric air valve according to claim 1, characterized in that: 135°≤β≤145°。 3. The electric damper according to claim 1, characterized in that: The first reinforcement member (23) comprises a connecting plate (232) and supporting plates (233) respectively connected to both sides of the connecting plate (232); the connecting plate (232) connects the rotating shaft (21) and the valve plate (22); the end of the supporting plate (233) away from the connecting plate (232) abuts against the valve plate (22); and the cross-section of the first reinforcement member (23) is trapezoidal, and the outer wall of each supporting plate (233) constitutes one of the air guide surfaces (231).

4. The electric air valve according to claim 1, characterized in that: The valve plate assembly (20) also includes a second reinforcement member (24), which is installed on the valve plate (22), and the second reinforcement member (24) and the first reinforcement member (23) are respectively located on two opposite sides of the valve plate (22); and the projection of the second reinforcement member (24) on the valve plate (22) and the projection of the rotating shaft (21) on the valve plate (22) are cross-arranged.

5. The electric air valve according to claim 4, characterized in that: The rotating shaft (21) extends along the radial direction of the valve plate (22), and the projection of the second reinforcement member (24) on the valve plate (22) is symmetrically arranged with the projection of the rotating shaft (21) on the valve plate (22) as a symmetry axis.

6. The electric air valve according to claim 5, characterized in that: The number of the second reinforcement member (24) is one, and the second reinforcement member (24) extends along the radial direction of the valve plate (22); Alternatively, there are a plurality of second reinforcement members (24), and the plurality of second reinforcement members (24) are arranged at intervals along the axial direction of the rotating shaft (21).

7. The electric damper according to claim 5, characterized in that: The number of the second reinforcement member (24) is one, and the second reinforcement member (24) extends along the radial direction of the valve plate (22); The diameter of the valve plate (22) is D, the length of the first reinforcement member (23) is L1, the length of the second reinforcement member (24) is L2, and 0.8D≤L1≤0.92D, 0.8D≤L2≤0.92D.

8. The electric air valve according to claim 4, characterized in that: The cross section of the second reinforcement member (24) is rectangular, the cross section height of the second reinforcement member (24) is h1, the cross section height of the first reinforcement member (23) is h2, the cross section width of the second reinforcement member (24) is h3, and h1=h2, 2.5h1≤h3≤5h1.

9. The electric air valve according to any one of claims 1 to 8, characterized in that: The valve body assembly (10) comprises a cylinder (12) and a valve seat (111) arranged on the inner peripheral wall of the cylinder (12); the valve seat (111) extends along the circumference of the cylinder (12) and surrounds a valve port (11); a side of the valve seat (111) relatively away from the inner peripheral wall of the cylinder (12) is configured as a sealing surface (112); the valve plate assembly (20) further comprises a sealing member (25); the sealing member (25) extends along the circumference of the valve plate (22) and is connected to the valve plate (22); Along the radial direction of the valve plate (22), the outer ring of the sealing member (25) extends out of the valve plate (22) and is used to seal with the sealing surface (112), and an angle α is formed between the sealing surface (112) and the axis of the valve port (11), and 3.3°≤α≤4.3°.

10. The electric damper according to claim 9, characterized in that: The valve plate assembly (20) further comprises a pressure ring (26) and a fastener. Along the thickness direction of the valve plate (22), at least a portion of the seal (25) is sandwiched between the pressure ring (26) and the valve plate (22). Furthermore, the valve plate (22), the seal (25) and the pressure ring (26) are connected via the fastener.

11. The electric damper according to claim 1, characterized in that: The electric air valve further comprises a driving motor (30); the valve body assembly (10) comprises a cylinder (12), a first bracket (131) and a second bracket (132); the valve plate assembly (20) is rotatably mounted inside the cylinder (12); the driving motor (30) is fixedly mounted outside the cylinder (12) via the first bracket (131); one end of the rotating shaft (21) passes through the cylinder (12) and the first bracket (131) in sequence and is transmission-connected to an output shaft of the driving motor (30); one end of the second bracket (132) is fixedly connected to the cylinder (12), and the other end is fixedly connected to the outer periphery of the driving motor (30).

12. The electric damper according to claim 11, characterized in that: An elastic reset component is provided inside the drive motor. When the drive motor (30) is powered on, the output shaft of the drive motor (30) drives the rotating shaft (21) to rotate, causing the elastic reset component to accumulate elastic potential energy, so that when the drive motor (30) is powered off, the elastic reset component can drive the rotating shaft (21) to rotate and open the valve port (11).

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