Feedback type electric valve

Abstract

The utility model relates to the technical field of valves, in particular to a feedback type electric valve. The feedback type electric valve comprises a valve base, a valve rod and a valve rod, 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 inlet is formed in the valve moving plate; the feedback mechanism comprises a sleeve, a baffle and a resistor, and the resistor is arranged on the inner wall of the sleeve; wherein the baffle plate is provided with a contact, and the contact is in contact with the resistor and can slide relative to the resistor, so that a slide rheostat is formed between the baffle plate and the resistor. A slide rheostat is formed by the baffle and the resistor, feedback signals can be formed based on changes of resistance values, so that real-time, timely and accurate feedback information is provided for a control system, the on-off state of the valve moving plate can be accurately perceived, and the flow can be perceived.

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] In modern industry and life, electric valves, as key components for controlling fluid flow, are widely used in various fields such as chemical industry, energy, water supply and drainage, etc. Traditional electric valves often have certain limitations in terms of control accuracy, response speed and intelligence.

[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 includes a sleeve, a baffle, and a resistor. The sleeve is installed in the medium pipeline and is arranged around the medium flow port. The baffle is received in the sleeve 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 resistor is arranged on the inner wall of the sleeve.

[0011] Wherein, a contact is provided on the baffle, and the contact contacts the resistor and can slide relative to the resistor under the drive of the baffle, so that a sliding rheostat is formed between the baffle and the resistor and the resistance value changes during the sliding process.

[0012] It is understood that the present application forms a sliding rheostat using a baffle and a resistor, and then the baffle responds to the thrust of the fluid medium in the medium flow port by sliding within the sleeve and changing the resistance value. Therefore, a feedback signal can be generated based on the change in the resistance value, thereby providing real-time, 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 setting up the sliding rheostat, not only the on / off state of the valve rotor can be accurately sensed, but also the flow rate can be sensed.

[0013] In one embodiment, a chute extending along the axis of the medium pipe is provided on the inner wall of the medium pipe, and the resistor is arranged in the chute;

[0014] The baffle is provided with a protrusion, and the protrusion is slidably installed in the sliding groove.

[0015] It can be understood that the provision of the protrusions and the sliding grooves can ensure the reliability of the contact between the baffle and the resistor.

[0016] In one embodiment, the number of the chute is configured to be multiple, and the multiple chute is spaced apart along the circumference of the medium pipeline;

[0017] The number of the protrusions is set in one-to-one correspondence with the number of the sliding grooves.

[0018] It can be understood that by providing a plurality of slide grooves and arranging the slide grooves at intervals along the circumference of the medium pipeline, the protrusions can cooperate with the grooves in different directions, further improving the reliability of the contact between the baffle and the resistor.

[0019] In one embodiment, the feedback mechanism further includes an elastic member, which is accommodated in the sleeve, and one end of the elastic member is located on the baffle, and the other end is located on the sleeve.

[0020] 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 connect to 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.

[0021] One end of the first diameter-reduced section away from the installation section is located outside the accommodating cavity.

[0022] 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, and the other end of the second reduced diameter section is installed at the medium flow port.

[0023] 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;

[0024] 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.

[0025] In one embodiment, the electric valve further includes a driving mechanism, which is connected to the valve actuator and is used to rotate the valve actuator to control the connection or disconnection between the medium inlet and the medium flow port.

[0026] 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.

[0027] In one embodiment, there are multiple medium flow ports, and the number of the medium pipes corresponds to the number of the medium inlets.

[0028] Wherein, the feedback mechanism is provided at each of the medium pipeline positions.

[0029] Compared to existing technologies, the electric valve described above uses a baffle and resistor to form a sliding rheostat. The baffle then responds to the thrust of the fluid in the medium flow port by sliding within the sleeve and changing its resistance. Therefore, changes in resistance generate a feedback signal, providing real-time, 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 sliding rheostat not only accurately senses the on / off state of the valve rotor but also the flow rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] 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.

[0031] Figure 1 This is a schematic diagram of the structure of the electric valve provided in this application.

[0032] Figure 2 Front view of the electric valve provided for this application.

[0033] Figure 3 A top view of the electric valve provided in this application.

[0034] Figure 4 Provided for this application Figure 3 Cross-sectional view at AA in the middle.

[0035] Figure 5 Provided for this application Figure 4 A partial enlarged view of point B in the middle.

[0036] Figure 6 Provided for this application Figure 5 Cross-sectional view at CC.

[0037] Figure 7 Exploded diagram of the electric valve provided for this application.

[0038] The reference numerals of the various components are as follows:

[0039] 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. Slide groove; 22. Mounting section; 23. First reduced diameter section; 231. First step; 24. Second reduced diameter section; 241. Second step; 30. Valve rotor; 31. Medium inlet; 32. Connecting shaft; 40. Feedback mechanism; 41. Sleeve; 411. Through hole; 42. Baffle; 421. Protrusion; 43. Resistor; 44. Elastic member; 45. Lead wire; 50. Driving mechanism; 51. Rotating shaft; 52. Transmission unit; 53. Rotor. DETAILED DESCRIPTION

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] See also Figures 1 to 7 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).

[0046] Please refer to Figures 1 to 4The 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 cavity 12. One end of the medium pipeline 20 extends into the receiving cavity 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 or disconnected with the medium flow port 11. The feedback mechanism 40 is configured to: Mechanism 40 includes a sleeve 41, a baffle 42, and a resistor 43. Sleeve 41 is installed within medium pipeline 20 and circumferentially surrounds medium flow port 11. Baffle 42 is housed within sleeve 41 and can move away from or toward medium flow port 11 in response to the thrust of the fluid within the medium flow port 11. Resistor 43 is located on the inner wall of sleeve 41. Baffle 42 is provided with a contact (not shown) that contacts and slides relative to resistor 43, forming a sliding rheostat between baffle 42 and resistor 43. In this manner, the baffle slides within the sleeve in response to the thrust of the fluid within the medium flow port, changing the resistance value. Therefore, a feedback signal is generated based on the change in resistance value, providing real-time, timely, and accurate feedback information to the control system. Based on this 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, the sliding rheostat not only accurately senses the on / off state of the valve rotor but also the flow rate.

[0047] 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.

[0048] like 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.

[0049] 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.

[0050] Furthermore, 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 , and the fluid medium enters the electric valve 100 through the communication pipe 15 .

[0051] like Figures 4 to 6 As shown, the inner wall of the medium pipe 20 is provided with a chute 21 extending along the pipe axis, and a resistor 43 is disposed within the chute 21. A protrusion 421 is provided on the baffle 42, which slides within the chute 21. Thus, the protrusion 421 contacts the resistor 43, forming a sliding rheostat. The arrangement of the protrusion 421 and the chute 21 ensures reliable contact between the baffle 42 and the resistor 43, thereby generating a stable resistance signal. Furthermore, the protrusion 421 and the chute 21 provide a guide, reducing sliding deviation caused by fluid impact and ensuring more stable movement of the baffle 42.

[0052] Here, the resistor 43 can be fixed to the slide groove 21 by means of snap connection, screw fixing, etc. Since it is in a fluid environment, the resistor 43 and the contacts on the protrusion 421 can be sealed and protected to prevent fluid from entering and causing short circuit or damage.

[0053] Preferably, there are multiple chute grooves 21, and the multiple chute grooves 21 are spaced apart along the circumference of the medium pipe 20; the number of protrusions 421 corresponds to the number of chute grooves 21. Here, by providing multiple chute grooves 21 and spacing the multiple chute grooves 21 along the circumference of the medium pipe, the protrusions 421 can cooperate with the chute grooves 21 in different directions, further improving the reliability of the contact between the baffle 42 and the resistor 43.

[0054] In this embodiment, the number of the chute 21 and the number of the protrusion 421 are both configured to be two. However, the number of the chute 21 can also be three, four, etc. Similarly, the same is true for the protrusion 421.

[0055] Please continue to refer to Figure 4 and Figure 5 The medium pipe 20 includes a connecting mounting section 22 and a first reduced-diameter section 23. The mounting section 22 is located within the accommodating chamber 12 and is connected to the medium flow port 11. The sleeve 41 is installed within the mounting section 22. A through hole 411 is defined in the circumferential sidewall of the sleeve 41, connecting the interior of the sleeve 41 with the mounting section 22. The end of the first reduced-diameter section 23, distal from the mounting section 22, is located outside the accommodating chamber 12. Thus, the medium flow port 11 enters the sleeve 41, flows through the through hole 411 into the mounting section 22, and then into the first reduced-diameter section 23.

[0056] Furthermore, the number of the through holes 411 is set to be multiple, and the multiple through holes 411 are spaced apart around the circumference of the sleeve 41. In this way, the flow can flow through the sleeve 41 quickly and smoothly.

[0057] Here, the number of the through holes 411 can be four, five, six, seven, etc. Within a reasonable range, the number of the through holes 411 can be selected according to actual conditions, which will not be elaborated here.

[0058] In the embodiment, the top of the sleeve 41 is connected to the top wall of the medium pipeline 20. Here, the connection between the sleeve 41 and the medium pipeline 20 is welding or threaded connection, etc., to ensure that no loosening or displacement occurs during operation.

[0059] Please continue to refer to Figure 4 and Figure 5 The medium pipeline 20 also includes a second reduced diameter section 24, which is located at one end of the installation section 22 away from the first reduced diameter section 23, and one end of the second reduced diameter section 24 extends into the sleeve 41 for cooperating with the baffle 42, and the other end of the second reduced diameter section 24 is installed at the medium flow port 11.

[0060] Here, the first diameter-reduced section 23 and the second diameter-reduced section 24 are respectively formed by reducing the diameter of the mounting section 22 ; a first step 231 is formed between the first diameter-reduced section 23 and the mounting section 22 , and a second step 241 is formed between the second diameter-reduced section 24 and the mounting section 22 .

[0061] In this embodiment, the first diameter-reduced section 23 , the mounting section 22 and the second diameter-reduced section 24 are coaxially arranged, and the first diameter-reduced section 23 and the second diameter-reduced section 24 have the same radius.

[0062] like Figures 4 and 5 As shown, the feedback mechanism 40 further includes an elastic member 44, which is housed within the sleeve 41. One end of the elastic member 44 is restrained by the baffle 42, and the other end is restrained by the sleeve 41. That is, when there is no flow, the elastic member 44 can reset the baffle 42. The elastic member 44 is electrically connected to the contact and is led out through the lead wire 45.

[0063] Preferably, the elastic member 44 is a spring.

[0064] like Figures 1 to 3 As shown, the electric valve 100 further includes a drive mechanism 50 connected to the valve actuator 30 for rotating the valve actuator 30 to control whether the medium inlet 31 is connected to the medium flow port 11 or not. The valve actuator is connected to the valve base 10 via a connecting shaft 32.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] The working principle of the electric valve 100 provided by this application is described below:

[0069] When the electric valve 100 is activated, if the baffle 42 is not subjected to force, the resistance value of the resistor 43 does not change. This indicates an abnormal condition in the electric valve 100, such as a foreign object on the surface of the valve actuator 30, a broken winding, or a foreign object in the rotor air gap. If the baffle 42 is subjected to force, the resistance value of the resistor 43 changes, and this resistance signal is fed back and output to the control system in real time. Based on this real-time feedback signal, the control system can provide real-time feedback on the flow rate and the accurate position of the valve actuator 30.

[0070] 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.

[0071] 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) includes a sleeve (41), a baffle (42), and a resistor (43); the sleeve (41) is installed in the medium pipe (20) and is arranged around the medium flow port (11); the baffle (42) is received in the sleeve (41) 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); and the resistor (43) is arranged on the inner wall of the sleeve (41); A contact is provided on the baffle (42), and the contact contacts the resistor (43) and can slide relative to the resistor (43) under the drive of the baffle (42), so that a sliding rheostat is formed between the baffle (42) and the resistor (43).

2. The electric valve according to claim 1, characterized in that A chute (21) extending along the axial direction of the medium pipeline is provided on the inner wall of the medium pipeline (20), and the resistor (43) is arranged in the chute (21); The baffle (42) is provided with a protrusion (421), and the protrusion (421) is slidably installed in the sliding groove (21).

3. The electric valve according to claim 2, characterized in that The number of the chute (21) is configured to be multiple, and the multiple chute (21) is arranged at intervals along the circumference of the medium pipeline (20); The number of the protrusions (421) is set in a one-to-one correspondence with the number of the sliding grooves (21).

4. The electric valve according to claim 1, characterized in that The feedback mechanism (40) further includes an elastic member (44), the elastic member (44) being accommodated in the sleeve (41), and one end of the elastic member (44) being limited to the baffle (42) and the other end being limited to the sleeve (41).

5. The electric valve according to claim 1, characterized in that The medium pipeline (20) comprises a mounting section (22) and a first diameter-reduced section (23) that are in communication with each other. The mounting section (22) is located in the accommodating cavity (12) and is used to connect with the medium flow port (11). The sleeve (41) is installed in the mounting section (22), and a through hole (411) is provided on the peripheral side wall of the sleeve (41) so as to connect the interior of the sleeve (41) with the mounting section (22) through the through hole (411). One end of the first diameter-reduced section (23) away from the installation section (22) is located outside the accommodating cavity (12).

6. The electric valve according to claim 5, characterized in that: The medium pipeline (20) further includes a second diameter-reducing section (24), the second diameter-reducing section (24) being located at one end of the mounting section (22) away from the first diameter-reducing section (23), and one end of the second diameter-reducing section (24) extending into the sleeve (41) for cooperating with the baffle (42), and the other end of the second diameter-reducing section (24) being mounted on the medium flow port (11).

7. The electric valve according to claim 6, characterized in that The first diameter-reduced section (23) and the second diameter-reduced section (24) are respectively formed by reducing the diameter of the installation section (22); A first step (231) is formed between the first diameter-reduced section (23) and the installation section (22), and a second step (241) is formed between the second diameter-reduced section (24) and the installation section (22).

8. The electric valve according to claim 1, characterized in that The electric valve further comprises a driving mechanism (50), which is connected to the valve actuator (30) and is used to rotate the valve actuator (30) to control the medium inlet (31) to be connected or disconnected with the medium flow port (11).

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 (20) 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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