Feedback type electric valve

Abstract

The utility model relates to the technical field of valves, in particular to a circuit feedback type electric valve. An electric valve comprises a valve base provided with a medium flowing opening and a containing cavity; one end of the medium pipeline extends into the containing cavity and is installed in the medium flowing opening, and the valve moving plate is located at the medium flowing opening and is rotationally connected to the valve base; a medium flowing opening is formed in the valve moving plate, a medium inlet is formed in the valve moving plate, and along with rotation of the valve moving plate, the medium inlet and the medium flowing opening can be connected or disconnected; the feedback mechanism is located in the containing cavity, and the feedback mechanism comprises an iron core baffle and an induction coil. By arranging the iron core baffle and the induction coil, the control system can feed back the flow and the accurate position of the valve rotor plate in real time. Namely, through the arrangement of the iron core baffle and the induction coil, the opening and closing state of the valve moving plate can be accurately sensed, and meanwhile the flow can be sensed.

Description

Technical Field

[0001] The present application relates to the field of valve technology, and in particular to a feedback type electric valve. Background Art

[0002] Electric valves are often used in modern industry and daily life. They are important components for controlling fluid media. With the continuous development of technology and the continuous improvement of application needs, people's requirements for the control accuracy and state feedback of electric valves are becoming increasingly stringent.

[0003] An electric valve typically consists of a valve body, stepper motor, gearbox, connector, copper tubing, and other components. The stepper motor drives the gearbox, which in turn drives the valve rotor. The relative movement between the rotor and the valve base opens and closes the pipeline. Existing technology uses open-loop control, controlling the stepper motor to rotate a certain number of steps and transmitting this information to the control system. The control system uses this number of steps to determine the valve rotor's position. However, this approach lacks real-time feedback on the valve opening and the position of the rotor. Utility Model Content

[0004] Based on this, it is necessary to provide an electric valve that can provide real-time and accurate feedback and perform flow control.

[0005] To solve the above technical problems, this application provides the following technical solutions:

[0006] An electric valve, comprising:

[0007] A valve base having a medium flow port and an accommodating cavity;

[0008] a medium pipe, one end of which extends into the accommodating cavity and is installed in the medium flow port;

[0009] a valve actuator, located at the medium flow port and rotatably connected to the valve base; and a medium inlet is formed on the valve actuator, wherein the medium inlet can be connected to or disconnected from the medium flow port as the valve actuator rotates;

[0010] A feedback mechanism is located in the accommodating cavity and includes an iron core baffle and an induction coil. The iron core baffle is located at the medium inlet and can move away from or closer to the medium flow port in response to the thrust of the fluid medium in the medium flow port. The induction coil is sleeved on the medium pipe and can sense the position of the movement of the iron core baffle.

[0011] It is understood that, by providing an iron core baffle and an induction coil, the iron core baffle directly responds to the thrust of the fluid medium in the medium flow port. The induction coil then senses the movement position of the iron core baffle in real time, converts it into an electrical signal, and provides timely and accurate feedback information to the control system. Based on real-time feedback, the control system can provide real-time feedback on the flow rate and the exact position of the valve rotor. In other words, by providing the iron core baffle and the induction coil, not only can the on / off state of the valve rotor be accurately sensed, but the flow rate can also be sensed at the same time.

[0012] In one embodiment, the feedback mechanism further includes a sleeve and an elastic member, the sleeve is received in the medium pipe, the core baffle is received in the sleeve and is slidably engaged with the inner wall of the sleeve;

[0013] The elastic member is accommodated in the sleeve, and one end of the elastic member is limited to the iron core baffle, and the other end is limited to the sleeve.

[0014] In one embodiment, a limiting groove is provided on the core baffle, and one end of the elastic member is limited in the limiting groove.

[0015] In one embodiment, the medium pipeline includes a mounting section and a first reduced diameter section that are interconnected. The mounting section is located in the accommodating cavity and is used to communicate with the medium flow port. The sleeve is installed in the mounting section, and a through hole is formed on the peripheral side wall of the sleeve to connect the interior of the sleeve with the mounting section through the through hole.

[0016] One end of the first diameter-reduced section away from the installation section is located outside the accommodating cavity.

[0017] In one embodiment, the medium pipeline also includes a second reduced diameter section, which is located at an end of the installation section away from the first reduced diameter section, and one end of the second reduced diameter section extends into the sleeve for cooperating with the iron core baffle, and the other end of the second reduced diameter section is installed at the medium flow port.

[0018] In one embodiment, the first diameter-reduced section and the second diameter-reduced section are respectively formed by reducing the diameter of the installation section; a first step is formed between the first diameter-reduced section and the installation section, and a second step is formed between the second diameter-reduced section and the installation section.

[0019] In one embodiment, the valve base includes a seat body and a cover plate, a cavity is formed on the seat body, and the cover plate covers the cavity and forms the cavity into the accommodating cavity; wherein the medium flow port is opened on the cover plate.

[0020] In one embodiment, the electric valve further includes a driving mechanism, which is connected to the valve moving plate and is used to rotate the valve moving plate.

[0021] In one embodiment, the driving mechanism includes a rotating shaft and a transmission unit. The rotating shaft is rotatably connected to the valve base, and the transmission unit is connected to the rotating shaft and to the valve rotor.

[0022] In one embodiment, there are multiple medium flow ports, and the number of the medium pipes is arranged in a one-to-one correspondence with the number of the medium inlets; wherein the feedback mechanism is provided at each position of the medium pipe.

[0023] Compared to existing technologies, this electric valve utilizes an iron core baffle and an induction coil. The iron core baffle directly responds to the thrust of the fluid in the medium flow port. The induction coil then senses the movement of the iron core baffle in real time, converting it into an electrical signal to provide timely and accurate feedback to the control system. Based on this real-time feedback, the control system can provide real-time feedback on the flow rate and the precise position of the valve rotor. In other words, the iron core baffle and induction coil configuration not only accurately senses the on / off state of each valve rotor, but also the flow rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 This is a schematic diagram of the structure of the electric valve provided in this application.

[0026] Figure 2 Front view of the electric valve provided for this application.

[0027] Figure 3 Provided for this application Figure 2 Cross-sectional view at HH in the middle.

[0028] Figure 4 Provided for this application Figure 2 Cross-sectional view at AA in the middle.

[0029] Figure 5 Provided for this application Figure 4 A partial enlarged view of point B in the middle.

[0030] Figure 6 Exploded diagram of the electric valve provided for this application.

[0031] The reference numerals of the components are as follows:

[0032] 100. Electric valve; 10. Valve base; 11. Medium flow port; 12. Accommodating chamber; 13. Seat body; 14. Cover plate; 15. Connecting pipe; 20. Medium pipe; 21. Mounting section; 22. First reduced diameter section; 221. First step; 23. Second reduced diameter section; 231. Second step; 30. Valve rotor; 31. Medium inlet; 32. Connecting shaft; 40. Feedback mechanism; 41. Iron core baffle; 411. Limiting groove; 42. Induction coil; 43. Sleeve; 431. Through hole; 44. Elastic member; 45. Lead wire; 50. Driving mechanism; 51. Rotating shaft; 52. Transmission unit; 53. Rotor. DETAILED DESCRIPTION

[0033] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0034] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0035] Furthermore, 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0036] In this application, unless otherwise expressly specified or limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or that the first feature and the second feature are indirectly in contact through an intermediate medium. Furthermore, a first feature being “above,” “above,” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below,” “below,” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification 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 specification of this application includes any and all combinations of one or more of the relevant listed items.

[0038] See also Figures 1 to 3 The present application provides an electric valve 100, which is electrically connected to an external control system, so that the operation of the electric valve 100 is controlled by the control system. Here, the control system can be a microcontroller unit (MCU).

[0039] Please refer to Figures 1 to 6The electric valve 100 includes a valve base 10, a medium pipeline 20, a valve actuator 30 and a feedback mechanism 40. The valve base 10 has a medium flow port 11 and a receiving chamber 12. One end of the medium pipeline 20 extends into the receiving chamber 12 and is installed in the medium flow port 11. The valve actuator 30 is located at the medium flow port 11 and is rotatably connected to the valve base 10. A medium inlet 31 is provided on the valve actuator 30. As the valve actuator 30 rotates, the medium inlet 31 can be connected to or disconnected from the medium flow port 11. The feedback mechanism 40 is located in the receiving chamber 12 and includes an iron core baffle 41 and an induction coil 42. The iron core baffle 41 is located at the medium inlet 31 and can move away from or closer to the medium flow port 11 in response to the thrust of the fluid medium in the medium flow port 11. The induction coil 42 is sleeved on the medium pipeline 20 and can sense the position of the movement of the iron core baffle 41. In this way, the core baffle 41 directly responds to the thrust of the fluid within the medium flow port. The induction coil 42 then senses the core baffle's movement in real time, converting it into an electrical signal and providing timely and accurate feedback to the control system. Based on this real-time feedback, the control system can provide real-time feedback on the flow rate and the precise position of the valve rotor. In other words, the arrangement of the core baffle and the induction coil allows for accurate sensing of not only the on / off status of each valve rotor but also the flow rate. The valve rotor 30 is rotatably connected to the valve base 10 via a connecting shaft 32.

[0040] In one embodiment, if Figure 1 and Figure 2 As shown, there are multiple medium flow ports 11, and the number of medium pipelines 20 corresponds to the number of medium inlets 31. A feedback mechanism 40 is provided at each medium pipeline 20. By providing multiple medium flow ports 11 and medium pipelines 20, the flow rates of different devices can be controlled simultaneously. By providing multiple feedback mechanisms 40, the status of the electric valves 100 of different devices can be fed back simultaneously.

[0041] Please refer to Figures 1 to 3 As shown, the valve base 10 further includes a base body 13 and a cover plate 14. A cavity is formed in the base body 13, and the cover plate 14 covers the cavity, forming an accommodating chamber 12. The medium flow port 11 is formed in the cover plate 14. Thus, by forming the accommodating chamber 12 in the valve base 10 to accommodate the feedback mechanism 40, this compact design avoids the space occupation and layout clutter caused by external piping.

[0042] Here, the base 13 and the cover 14 can be fixedly connected by means of buckles, screws, etc. This facilitates the inspection and maintenance of the internal feedback mechanism 40.

[0043] In one embodiment, a communication pipe 15 is provided on the valve base 10 . The communication pipe 15 is a pipe that passes through the valve base 10 . The fluid medium enters the electric valve 100 through the communication pipe 15 .

[0044] Please refer to Figure 3 and Figure 5 As shown, the feedback mechanism 40 also includes a sleeve 43 and an elastic member 44. The sleeve 43 is accommodated in the medium pipeline 20, and the core baffle 41 is accommodated in the sleeve 43 and slides with the inner wall of the sleeve 43. In this way, the movement of the core baffle 41 can be guided by the sleeve 43 to make its movement more stable; the elastic member 44 is accommodated in the sleeve 43, and one end of the elastic member 44 is limited to the core baffle 41, and the other end is limited to the sleeve 43, that is, when there is no flow, the elastic member 44 can reset the core baffle 41.

[0045] In one embodiment, a limiting slot 411 is defined in the core baffle 41, and one end of the elastic member 44 is retained within the limiting slot 411. An induction coil 42 is sleeved within the medium pipeline 20 near the core baffle 41 and connected to a lead wire 45, thereby outputting a position signal of the core baffle 41 via the lead wire 45. The top of the sleeve 43 can be securely connected to the top wall of the medium pipeline 20 by welding or threading to ensure that it does not loosen or shift during operation.

[0046] Preferably, the elastic member 44 is a spring.

[0047] Please continue to refer to Figure 3 and Figure 5 The medium pipe 20 includes a connecting mounting section 21 and a first reduced-diameter section 22. The mounting section 21 is located within the accommodating chamber 12 and is connected to the medium flow port 11. A sleeve 43 is installed within the mounting section 21. A through hole 431 is defined on the sidewall of the sleeve 43, connecting the interior of the sleeve 43 with the mounting section 21. The end of the first reduced-diameter section 22, distal from the mounting section 21, is located outside the accommodating chamber 12. Thus, the medium flow port 11 enters the sleeve 43, flows through the through hole 431 into the mounting section 21, and then into the first reduced-diameter section 22.

[0048] Here, the number of the through holes 431 is set to be multiple, and the multiple through holes 431 are spaced apart around the circumference of the sleeve 43. In this way, the flow can flow through the sleeve 43 quickly and smoothly.

[0049] Here, the number of the through holes 431 can be four, five, six, seven, etc. Within a reasonable range, the number of the through holes 431 can be selected according to actual conditions, which will not be elaborated here.

[0050] Furthermore, the medium pipeline 20 also includes a second reduced diameter section 23, which is located at one end of the installation section 21 away from the first reduced diameter section 22, and one end of the second reduced diameter section 23 extends into the sleeve 43 for cooperating with the iron core baffle 41, and the other end of the second reduced diameter section 23 is installed at the medium flow port 11.

[0051] Here, the first diameter-reduced section 22 and the second diameter-reduced section 23 are respectively formed by reducing the diameter of the mounting section 21 ; a first step 221 is formed between the first diameter-reduced section 22 and the mounting section 21 , and a second step 231 is formed between the second diameter-reduced section 23 and the mounting section 21 .

[0052] In this embodiment, the first diameter-reduced section 22 , the mounting section 21 and the second diameter-reduced section 23 are coaxially arranged, and the first diameter-reduced section 22 and the second diameter-reduced section 23 have the same radius.

[0053] Please refer to Figure 1 and Figure 2 The electric valve 100 further includes a driving mechanism 50 , which is connected to the valve actuator 30 and is used to rotate the valve actuator 30 , thereby connecting or disconnecting the medium flow port 11 and the medium inlet 31 .

[0054] Specifically, the drive mechanism 50 includes a rotating shaft 51 and a transmission unit 52. The rotating shaft 51 is rotatably connected to the valve base 10, and the transmission unit 52 is connected to the rotating shaft 51 and to the valve actuator 30. As the rotating shaft 51 rotates, the transmission unit 52 moves, and driven by the transmission unit 52, the valve actuator 30 rotates and connects or disconnects the medium inlet 31 and the medium flow port 11.

[0055] Preferably, the transmission unit 52 is configured as a gear structure, and the valve actuator 30 meshes with the transmission unit 52. Thus, rotation of the rotating shaft 51 drives the transmission unit 52, which in turn drives the valve actuator 30 through the transmission unit 52. Specifically, the transmission unit 52 is configured as a gear plate, and teeth are provided along the circumference of the valve actuator 30. The gear plate meshes with the teeth of the valve actuator 30 for transmission. Of course, this is not limiting; the transmission unit 52 may also be configured as a sprocket structure.

[0056] Furthermore, the driving mechanism 50 further includes a rotor 53 . The rotor 53 is mounted on the rotating shaft 51 . The rotor 53 is driven by the stator to rotate, so that the rotor 53 drives the rotating shaft 51 to rotate.

[0057] The working principle of the electric valve 100 provided by this application is described below:

[0058] When the electric valve 100 is activated, if the core baffle 41 is not subjected to force, the induction coil 42 does not sense the position change of the core baffle 41 and does not output a feedback signal. This indicates that the electric valve 100 has experienced an abnormal condition, such as a foreign object on the surface of the valve rotor 30, a broken winding, or a foreign object in the rotor air gap. If the core baffle 41 is subjected to force, the induction coil 42 senses the position of the core baffle 41 and outputs a real-time feedback signal to the control system. This feedback signal allows the control system to provide real-time feedback on the flow rate and the accurate position of the valve rotor.

[0059] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.

[0060] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.

Claims

1. An electric valve, characterized in that: The electric valve comprises: A valve base (10) having a medium flow port (11) and an accommodating cavity (12); a medium pipe (20), one end of which extends into the accommodating cavity (12) and is installed in the medium flow port (11); A valve actuator (30) is located at the medium flow port (11) and is rotatably connected to the valve base (10); a medium inlet (31) is provided on the valve actuator (30), wherein, as the valve actuator (30) rotates, the medium inlet (31) can be connected to or disconnected from the medium flow port (11); A feedback mechanism (40) is located in the accommodating chamber (12), and the feedback mechanism (40) includes an iron core baffle (41) and an induction coil (42). The iron core baffle (41) is located at the medium inlet (31) and can move away from or close to the medium flow port (11) in response to the thrust of the fluid medium in the medium flow port (11). The induction coil (42) is sleeved on the medium pipe (20) and can sense the position of the movement of the iron core baffle (41).

2. The electric valve according to claim 1, characterized in that The feedback mechanism (40) further comprises a sleeve (43) and an elastic member (44); the sleeve (43) is received in the medium pipeline (20); the core baffle (41) is received in the sleeve (43) and is slidably engaged with the inner wall of the sleeve (43); The elastic member (44) is accommodated in the sleeve (43), and one end of the elastic member (44) is limited to the core baffle (41), and the other end is limited to the sleeve (43).

3. The electric valve according to claim 2, characterized in that A limiting groove (411) is provided on the core baffle (41), and one end of the elastic member (44) is limited in the limiting groove (411).

4. The electric valve according to claim 2, characterized in that: The medium pipeline (20) comprises a mounting section (21) and a first diameter-reduced section (22) that are in communication with each other. The mounting section (21) is located in the accommodating cavity (12) and is used to communicate with the medium flow port (11). The sleeve (43) is installed in the mounting section (21), and a through hole (431) is provided on the peripheral side wall of the sleeve (43) so as to communicate the interior of the sleeve (43) with the mounting section (21) through the through hole (431). One end of the first diameter-reduced section (22) away from the installation section (21) is located outside the accommodating cavity (12).

5. The electric valve according to claim 4, characterized in that: The medium pipeline (20) further includes a second diameter-reduced section (23), the second diameter-reduced section (23) being located at one end of the mounting section (21) away from the first diameter-reduced section (22), and one end of the second diameter-reduced section (23) extending into the sleeve (43) for cooperating with the core baffle (41), and the other end of the second diameter-reduced section (23) being mounted on the medium flow port (11).

6. The electric valve according to claim 5, characterized in that: The first diameter-reduced section (22) and the second diameter-reduced section (23) are respectively formed by reducing the diameter of the installation section (21); A first step (221) is formed between the first diameter-reduced section (22) and the installation section (21), and a second step (231) is formed between the second diameter-reduced section (23) and the installation section (21).

7. The electric valve according to claim 4 or 5, characterized in that: The valve base (10) comprises a seat body (13) and a cover plate (14); a cavity is formed on the seat body (13); the cover plate (14) covers the cavity and enables the cavity to form the accommodating chamber (12); Wherein, the medium flow port (11) is opened on the cover plate (14).

8. The electric valve according to claim 1, characterized in that The electric valve further comprises a driving mechanism (50), wherein the driving mechanism (50) is connected to the valve moving plate (30) and is used for rotating the valve moving plate (30).

9. The electric valve according to claim 8, characterized in that The driving mechanism (50) comprises a rotating shaft (51) and a transmission unit (52), wherein the rotating shaft (51) is rotatably connected to the valve base (10), and the transmission unit (52) is connected to the rotating shaft (51) and to the valve rotor (30).

10. The electric valve according to claim 1, characterized in that There are multiple medium flow ports (11), and the number of the medium pipes is arranged in a one-to-one correspondence with the number of the medium inlets (31); Wherein, the feedback mechanism (40) is provided at each position of the medium pipeline (20).

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