Motorized valve

Abstract

This application belongs to the field of valve technology, and particularly relates to an electric valve, comprising: a three-way valve body having a first cavity, a second cavity, and a third cavity; a fixed plate is provided in the first cavity; a sealing seat is provided in the second cavity, the sealing seat being opposite to the fixed plate and having a through hole; a driving mechanism including: a lead screw motor, a push rod, and a valve core seat; the lead screw motor is located at the end of the fixed plate facing away from the second cavity, the output end of the lead screw motor is connected to the push rod, the end of the push rod passes through the fixed plate, the valve core seat is connected to the end of the push rod, and the valve core seat is located on one side of the third cavity, the valve core seat being used to control the opening and closing of the through hole. This electric valve uses the lead screw motor to drive the push rod and the valve core seat, controlling the opening and closing of the through hole to achieve media flow control; simultaneously, by setting up the fixed plate, the media is effectively isolated from the lead screw motor, preventing the lead screw motor from operating in a humid environment and ensuring the normal operation of the lead screw motor.

Description

Technical Field

[0001] This application relates to valve devices, and more particularly to an electric valve. Background Technology

[0002] Electric valves are an important device for automating industrial pipeline systems. They are ordinary valves with an electric actuator installed. Powered by electricity, the actuator controls the opening and closing of the valve, providing functions such as flow diversion, shut-off, and throttling. However, existing electric valves suffer from slow switching speeds, performance degradation in humid environments, high costs, and inconvenient maintenance.

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0004] In view of at least one of the above technical problems, this application provides an electric valve that solves the problems of slow opening and closing speed, performance degradation in humid environments, high cost, and inconvenient maintenance of existing electric valves.

[0005] This application provides an electric valve, comprising:

[0006] The three-way valve body has a first cavity, a second cavity and a third cavity. A fixing plate is provided in the first cavity, and a sealing seat is provided in the second cavity. The sealing seat is arranged opposite to the fixing plate and has a through hole.

[0007] The drive mechanism includes a lead screw motor, a push rod, and a valve core seat. The lead screw motor is located at one end of the fixed plate facing away from the second cavity. The output end of the lead screw motor is connected to the push rod. The end of the push rod passes through the fixed plate. The valve core seat is connected to the end of the push rod and is located on one side of the third cavity. The valve core seat is used to control the opening and closing of the through hole.

[0008] One of the above technical solutions has at least one of the following advantages or beneficial effects: This electric valve drives the push rod and valve core seat through the screw motor to control the opening and closing of the through hole and realize the flow control of the medium; at the same time, by setting a fixing plate, the medium is effectively isolated from the screw motor, avoiding the screw motor from operating in a humid environment and ensuring that the screw motor can operate normally.

[0009] In some alternative implementations, the drive mechanism further includes: mounting posts, having three posts spaced apart on a fixed plate, with a lead screw motor connected to the three mounting posts.

[0010] In some alternative implementations, the drive mechanism further includes: a guide seat and a retaining ring, the guide seat being connected to the output end of the lead screw motor, the guide seat being sleeved on two mounting posts, the retaining ring being connected to the guide seat, and the push rod being connected to the retaining ring.

[0011] In some alternative implementations, the drive mechanism further includes: a first photoelectric switch, which is disposed close to the fixed plate, and a sensing block is provided on the guide seat corresponding to the first photoelectric switch.

[0012] In some alternative implementations, the drive mechanism further includes a second photoelectric switch and a sensing plate, wherein the second photoelectric switch is positioned close to the lead screw motor, and the sensing plate is sleeved on the lead screw portion of the lead screw motor, with the sensing plate corresponding to the second photoelectric switch.

[0013] The present application will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a diagram showing the internal structure of the electric valve as illustrated in an embodiment of this application;

[0016] Figure 2 for Figure 1 Structural diagram of the drive mechanism;

[0017] In the diagram: 100, three-way valve body; 110, first chamber; 120, second chamber; 130, third chamber;

[0018] 111. Fixing plate; 121. Sealing seat; 122. Through hole;

[0019] 200. Drive mechanism; 210. Lead screw motor; 220. Push rod; 230. Valve core seat; 240. Mounting column; 250. Guide seat;

[0020] 260. Fixing ring; 270. First photoelectric switch; 280. Second photoelectric switch; 290. Sensing sheet; 251. Sensing block; Detailed Implementation

[0021] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0022] like Figure 1 and Figure 2 As shown, this embodiment provides an electric valve, including a three-way valve body 100 and a drive mechanism 200.

[0023] The three-way valve body 100 has a first cavity 110, a second cavity 120 and a third cavity 130. The first cavity 110 is provided with a fixing plate 111, and the second cavity 120 is provided with a sealing seat 121. The sealing seat 121 is arranged opposite to the fixing plate 111 and has a through hole 122. The drive mechanism 200 includes a lead screw motor 210, a push rod 220 and a valve core seat 230. The lead screw motor 210 is located at the end of the fixing plate 111 facing away from the second cavity 120. The output end of the lead screw motor 210 is connected to the push rod 220. The end of the push rod 220 passes through the fixing plate 111. The valve core seat 230 is connected to the end of the push rod 220 and is located on one side of the third cavity 130. The valve core seat 230 is used to control the opening and closing of the through hole 122.

[0024] In some embodiments, the central axis of the first cavity 110 overlaps with the central axis of the second cavity 120, and the central axis of the third cavity 130 is perpendicular to both the central axes of the first cavity 110 and the second cavity 120. A cavity exists between the first cavity 110, the second cavity 120, and the third cavity 130, within which the end of the push rod 220 and the valve core seat 230 can move. For example, when the lead screw motor 210 drives the valve core seat 230 to move away from the sealing seat 121, the valve core seat 230 enters the cavity, the through hole 122 opens, and the medium can sequentially pass through the second cavity 120, the through hole 122, and the cavity, finally flowing out from the third cavity 130.

[0025] In some embodiments, a sealing ring is provided on the surface of the fixing plate 111 that is in contact with the inner wall of the first cavity 110 to enhance the sealing performance of the fixing plate 111.

[0026] In some embodiments, an outer shell is provided in the first cavity 110 to cover the drive mechanism 200 and isolate the drive mechanism 200 from the outside.

[0027] In this embodiment, the electric valve drives the push rod 220 and valve core seat 230 through the lead screw motor 210 to control the opening and closing of the through hole 122, thereby realizing the flow control of the medium. At the same time, by setting the fixing plate 111, the medium is effectively isolated from the lead screw motor 210, avoiding the lead screw motor 210 from operating in a humid environment and ensuring that the lead screw motor 210 can operate normally.

[0028] In some embodiments, such as Figure 1 and Figure 2 As shown, the drive mechanism 200 also includes: mounting posts 240, three of which are spaced apart on the fixed plate 111, and the lead screw motor 210 is connected to the three mounting posts 240.

[0029] The mounting posts 240 are cylindrical, and the three mounting posts 240 have the same length. In some embodiments, the mounting posts 240 are connected between the fixing plate 111 and the lead screw motor 210 to support the lead screw motor 210.

[0030] In some embodiments, such as Figure 1 and Figure 2 As shown, the drive mechanism 200 also includes: a guide seat 250 and a fixing ring 260. The guide seat 250 is connected to the output end of the lead screw motor 210. The guide seat 250 is sleeved on two mounting posts 240. The fixing ring 260 is connected to the guide seat 250. The push rod 220 is connected to the fixing ring 260.

[0031] The guide seat 250 is a sheet-like part. In some embodiments, the middle part of the guide seat 250 is connected to the output end of the lead screw motor 210, and the two sides of the guide seat 250 are respectively sleeved on the mounting post 240, so that it can move along the length direction of the mounting post 240.

[0032] The retaining ring 260 is cylindrical and hollow inside. In some embodiments, one end of the retaining ring 260 is connected to the middle of the guide seat 250, and the push rod 220 passes through the retaining ring 260 and is locked to the retaining ring 260 by screws.

[0033] In some embodiments, such as Figure 1 and Figure 2 As shown, the drive mechanism 200 also includes a first photoelectric switch 270, which is disposed near the fixed plate 111, and a sensing block 251 is provided on the guide seat 250 corresponding to the first photoelectric switch 270.

[0034] The sensing block 251 is located at the end of the guide seat 250 facing the first photoelectric switch 270.

[0035] The first photoelectric switch 270 is a photoelectric sensor. In some embodiments, the first photoelectric switch 270 is connected to a controller and is used to send a signal to the controller to stop the lead screw motor 210. When the sensing block 251 enters the first photoelectric switch 270, the first photoelectric switch 270 sends a signal to the controller, and the controller controls the lead screw motor 210 to close. At this time, the valve core seat 230 closes the through hole 122.

[0036] In some embodiments, such as Figure 1 and Figure 2 As shown, the drive mechanism 200 also includes a second photoelectric switch 280 and a sensing plate 290. The second photoelectric switch 280 is disposed near the lead screw motor 210, and the sensing plate 290 is sleeved on the lead screw part of the lead screw motor 210. The sensing plate 290 is disposed corresponding to the second photoelectric switch 280.

[0037] The sensing element 290 is circular. In some embodiments, the sensing element 290 has a notch. When the electric valve is in the closed state, the notch on the sensing element 290 faces the second photoelectric switch 280.

[0038] The second photoelectric switch 280 is used to regulate the flow rate of the medium. In some embodiments, when the electric valve is in the closed state, the notch on the sensing plate 290 faces the second photoelectric switch 280, and at this time, the valve core seat 230 closes the through hole 122. When the electric valve is working, the sensing plate 290 rotates with the lead screw of the lead screw motor 210. The second photoelectric switch 280 detects the rotation position of the sensing plate 290 to detect the distance between the valve core seat 230 and the sealing seat 121, thereby controlling the opening degree of the valve core seat 230 and the opening of the third cavity 130, and thus controlling the flow rate of the medium.

[0039] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0040] In the description of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0042] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] In the embodiments of this application, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0044] The above are merely preferred embodiments of this application and do not constitute any limitation on this application. Any person skilled in the art can make many possible variations and modifications to the technical solution of this application, or modify it into equivalent embodiments, without departing from the scope of the technical solution of this application. Therefore, all equivalent changes made based on the shape, structure, and principle of this application without departing from the content of the technical solution of this application should be covered within the protection scope of this application.

Claims

1. An electrically operated valve characterised in that, include: The three-way valve body has a first cavity, a second cavity and a third cavity. A fixing plate is provided in the first cavity, and a sealing seat is provided in the second cavity. The sealing seat is disposed opposite to the fixing plate and has a through hole. The driving mechanism includes a lead screw motor, a push rod, and a valve core seat. The lead screw motor is located at one end of the fixed plate facing away from the second cavity. The output end of the lead screw motor is connected to the push rod. The end of the push rod passes through the fixed plate. The valve core seat is connected to the end of the push rod. The valve core seat is located on one side of the third cavity and is used to control the opening and closing of the through hole.

2. The motorized valve of claim 1, wherein, The drive mechanism further includes: mounting columns, of which there are three and spaced apart on the fixed plate, and the lead screw motor is connected to the three mounting columns.

3. The motorized valve of claim 2, wherein, The drive mechanism further includes: a guide seat and a fixing ring. The guide seat is connected to the output end of the lead screw motor. The guide seat is sleeved on the two mounting columns. The fixing ring is connected to the guide seat. The push rod is connected to the fixing ring.

4. The motorized valve of claim 3, wherein, The driving mechanism further includes: a first photoelectric switch, which is disposed near the fixed plate, and a sensing block is provided on the guide seat corresponding to the first photoelectric switch.

5. The motorized valve of claim 1, wherein, The driving mechanism further includes a second photoelectric switch and a sensing plate. The second photoelectric switch is disposed near the lead screw motor, and the sensing plate is sleeved on the lead screw part of the lead screw motor. The sensing plate is disposed corresponding to the second photoelectric switch.

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