Electric rotary valve

Abstract

The utility model provides an electric rotary valve which comprises a valve body, a valve cavity is formed in the valve body, a fluid inlet, a fluid outlet and a control port which are communicated with the valve cavity are formed in the valve body, a rotary valve element is arranged in the valve cavity, a rotary valve rod is connected with the rotary valve element, a control assembly is arranged at the control port, and rotary control over the rotary valve rod is achieved through the control port. Comprising a mounting shell for control, a motor for control, a middle rotating part, a first rotating limiting switch, a second rotating limiting switch and an indicating assembly matched with the middle rotating part, and the indicating assembly indicates the opening or closing state of a rotating valve element according to the first maximum rotating position or the second maximum rotating position to which the middle rotating part rotates. Comprising an indicating piece directly or indirectly arranged on the middle rotating piece, an observation opening formed in the mounting shell for control, and a first terminal position identifier and a second terminal position identifier which are arranged on the outer surface of the mounting shell for control. And an operator can conveniently know whether the rotary valve is in an open state or a closed state in real time.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline equipment technology, and in particular relates to an electric rotary valve with electric function. Background Technology

[0002] The background information related to this utility model provided in this section may not all be prior art, and may contain content that does not constitute prior art.

[0003] Existing valves can be classified into rotary valves (which rotate) and linear valves (which move in a straight line) based on the operating method of the valve core.

[0004] This rotary valve is often used to regulate the flow rate of fluid through the cross-section of the pipe, that is, to control the size of the opening and closing area of ​​the channel through which the fluid flows by rotating the valve.

[0005] In practical use, in order to make it easier to operate the rotary valve, it is made into an electric rotary valve.

[0006] Although the electric rotary valve can automatically open or close, when operators are on-site to inspect it, they may not know the current state of the electric rotary valve (i.e., open or closed state), which may lead to misoperation. That is, the valve that should be closed may be opened, or the valve that should be opened may be closed, causing inconvenience to on-site operators and potentially causing more serious adverse consequences due to misoperation. Utility Model Content

[0007] The purpose of this invention is to provide an electric rotary valve that, through an indicator component, allows on-site operators to clearly see the current status of the electric rotary valve, reducing the chance of misoperation.

[0008] To achieve the above objectives, this utility model proposes an electric rotary valve, comprising:

[0009] The valve body has a valve cavity inside it;

[0010] A fluid inlet is located on the valve body and communicates with the valve cavity;

[0011] A fluid outlet is located on the valve body and communicates with the valve cavity;

[0012] A control port is located on the valve body and communicates with the valve cavity;

[0013] A rotary valve core is located inside the valve chamber, and the fluid in the valve chamber can be allowed to flow or blocked by rotating the rotary valve core;

[0014] A rotary valve stem is connected to the rotary valve core;

[0015] A control component, located at the control port, enables rotational control of the rotary valve stem via the control port, including:

[0016] A mounting housing for control is provided on the control port;

[0017] A control motor is mounted on the control housing;

[0018] An intermediate rotating component is disposed between the control motor and the rotary valve stem, and is used to drive the rotary valve stem to rotate synchronously under the drive of the control motor;

[0019] A first rotary limit switch, electrically connected to the control motor and cooperating with the intermediate rotating component, is used to limit the intermediate rotating component to a first maximum rotational position that it can rotate to in a rotational direction; and

[0020] A second rotary limit switch, electrically connected to the control motor and cooperating with the intermediate rotating component, is used to limit the intermediate rotating component to a second maximum rotational position that it can reach when rotating in a direction opposite to the first rotational direction; and

[0021] An indicating component, cooperating with the intermediate rotating member, indicates the open or closed state of the rotary valve core according to the first maximum rotation position or the second maximum rotation position reached by the intermediate rotating member, including:

[0022] An indicator element, directly or indirectly disposed on the intermediate rotating member, rotates synchronously with the intermediate rotating member; and

[0023] An observation port is provided on the control mounting housing and is used in conjunction with the indicator to observe the indicator.

[0024] A first terminal position indicator is provided on the outer surface of the control mounting housing and adjacent to the observation port, for indicating the position of the indicator when the intermediate rotating member rotates to the first maximum rotation position;

[0025] The second terminal position indicator is provided on the outer surface of the control mounting housing and on the other side corresponding to the observation port, and is used to indicate the position of the indicator when the intermediate rotating member rotates to the second maximum rotation position.

[0026] In one example, the intermediate rotating component includes:

[0027] The first rotating protrusion protrudes outward in a radial direction with the axis of the intermediate rotating member as its center; and

[0028] The second rotating protrusion protrudes out in another radial direction with the axis on the intermediate rotating member as the center;

[0029] The first rotating protrusion engages with the first rotating limit switch when it rotates to the first maximum rotating position; the second rotating protrusion engages with the second rotating limit switch when it rotates to the second maximum rotating position.

[0030] In one example, the surface of the portion of the first rotating protrusion that mates with the first rotating limit switch is a plane;

[0031] The surface of the portion of the second rotating protrusion that engages with the second rotating limit switch is a plane.

[0032] One example also includes:

[0033] At least two rotation limiters cooperate with the intermediate rotating component and are respectively located at the first maximum rotation position and the second maximum rotation position.

[0034] In one example, the indicator component also includes:

[0035] A protective sleeve is fitted over the upper end of the indicator.

[0036] A portion of the protective sleeve for indicating the device moves into the observation port as the intermediate rotating component rotates.

[0037] In one example, the upper end of the protective sleeve for indicating the indicator has an arc-shaped structure, with the bottom of the arc-shaped surface located at the top and the edge located at the bottom.

[0038] In one example, the size and shape of the observation port are substantially the same as the size and shape of the area covered by the movement trajectory of the upper end of the indicator.

[0039] In one example, the control component further includes:

[0040] A Hall sensor, electrically connected to the control motor, is used to detect the rotation angle of the control motor;

[0041] The indication component further includes:

[0042] Several intermediate position markers are provided on the outer surface of the control mounting housing and located between the first terminal position marker and the second terminal position marker, for indicating the opening degree of the electric rotary valve.

[0043] In one example, the control mounting housing includes:

[0044] Control unit mounting shell; and

[0045] The lower housing for control is directly or indirectly mounted on the control port, and its upper part is detachably connected to the upper housing for control.

[0046] The control component and the indicator in the indicator component are directly or indirectly disposed on the lower housing of the control assembly; the observation port, the first terminal position mark and the second terminal position mark on the indicator component are disposed on the upper side of the upper housing of the control assembly.

[0047] In one example, the upper side of the control mounting housing includes:

[0048] The top of the upper shell is a planar structure; and

[0049] The ring-shaped part of the upper shell is connected to the outer edge of the top platform of the upper shell and is inclined downward from the inside to the outside.

[0050] The observation port, the first terminal position marker, and the second terminal position marker on the indicator component are located on the top platform of the upper shell.

[0051] In one example, when a control panel is provided on the top of the upper shell, the first terminal position indicator and the second terminal position indicator are provided on the control panel, and the portion of the control panel corresponding to the observation port on the indicator component is made of transparent material.

[0052] In one example, the hardness of the material used for the protective cover of the indicator is lower than the hardness of the material used for the mounting housing of the control.

[0053] In one example, there are four rotation limiters, which are respectively located at the first maximum rotation position, the second maximum rotation position, the third maximum rotation position, and the fourth maximum rotation position;

[0054] Wherein, the third maximum rotation position is the position of the first rotating protrusion when the second rotating protrusion rotates to the second maximum rotation position; the fourth maximum rotation position is the position of the second rotating protrusion when the first rotating protrusion rotates to the first maximum rotation position.

[0055] One example also includes:

[0056] The peripheral component for rotation limiting is spaced apart from the side of the intermediate rotating component where the indicator is located, and is used to prevent the intermediate rotating component from colliding with external components when it rotates.

[0057] Additional aspects and advantages of this invention will be set forth in the description which follows, and in part will be obvious from the description or may be learned by practice of the invention. Attached Figure Description

[0058] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0059] Figure 1 This is a schematic diagram of the overall structure according to one embodiment of the present invention.

[0060] Figure 2 for Figure 1 A schematic diagram of the overall structure from another perspective.

[0061] Figure 3 for Figure 1 A top-down view.

[0062] Figure 4 for Figure 1 A schematic diagram of the structure of the control unit with the upper shell installed.

[0063] Figure 5 for Figure 1 A structural schematic diagram of the valve body, control components, and indicator components from one perspective.

[0064] Figure 6 for Figure 5 An enlarged schematic diagram of part A in the diagram.

[0065] Figure 7 for Figure 1 A structural schematic diagram of the valve body, control components, and indicator components from another perspective.

[0066] The accompanying drawings are for illustrative purposes only and are not intended to be drawn to scale. The same reference numerals are used to indicate the same elements in the drawings. For simplicity, not every component is numbered in every drawing. Detailed Implementation

[0067] The present invention will be described below with reference to several examples. It should be understood that these embodiments are described in order to enable those skilled in the art to better understand and implement the present invention, and do not imply any limitation on the scope of the present invention.

[0068] A rotary valve is a type of valve that allows or stops the flow of fluid within the valve by rotating a rotating component. A rotary valve whose rotating component can rotate 90 degrees is called a quarter-rotary valve. Sometimes the classification of quarter-rotary valves can be expanded to include rotary valves with a rotation angle of less than 270 degrees. The rotating component includes a valve stem and a valve core, the structure of which can be configured in different ways as needed, such as a baffle structure, a ball structure, etc.

[0069] Since the rotary valve is controlled by rotation, it is suitable for control by operating a motor.

[0070] However, in actual operation, although the rotary valve operated by the motor can automatically open or close, the operators on site may not know the current state of the rotary valve (i.e., open or closed state), which may lead to misoperation. That is, the valve that should be closed is opened, or the valve that should be opened is closed, causing inconvenience to the operators on site and potentially causing more serious adverse consequences due to misoperation.

[0071] To potentially solve the aforementioned problems, one embodiment of this utility model includes a valve body, a rotary valve core, a rotary valve stem, a control assembly, and an indicator assembly.

[0072] Valve body

[0073] In one example of the valve body, the valve body 101 has a valve cavity 102 that communicates with the outside.

[0074] The valve chamber 102 allows for the inflow and outflow of fluid from the connected pipeline. To allow or cut off the flow of fluid within the valve, a rotary valve core (not shown) is provided within the valve chamber 102, and a rotary valve stem (not shown) is connected to the rotary valve core (not shown). The purpose of allowing or cutting off the flow of fluid within the valve is achieved by rotating the rotary valve core.

[0075] The valve body 101 is also provided with a fluid inlet 103, a fluid outlet 104, and a control port 105. The fluid inlet 103, fluid outlet 104, and control port 105 are all connected to the valve cavity 102. The fluid inlet 103 and fluid outlet 104 are connected to the pipelines they are connected to, while the control port 105 is mainly provided for installing the control component.

[0076] The material of the valve body can be set as needed, such as engineering plastics, or a mixture of materials with iron or aluminum as the main components.

[0077] Rotary valve core and rotary valve stem

[0078] The rotary valve core and rotary valve stem are components that directly interact with the fluid in the valve chamber. The flow or blockage of the fluid in the valve chamber is achieved by adjusting the rotational position of the rotary valve core.

[0079] The rotary valve core can be a plate structure, a hemispherical structure, or other customizable structures.

[0080] The rotary valve stem is typically connected to the rotary valve core at one end. Rotation of the rotary valve stem is used to synchronously control the rotation of the rotary valve core. To improve the strength of the connection, the rotary valve stem and the rotary valve core can be designed as a single, integrally formed structure.

[0081] Control components

[0082] This control component is used to automatically control the rotation of the rotary valve stem. Specifically, it controls the rotation angle and direction of the rotary valve stem.

[0083] An example of this control component, such as Figure 5 , 6 As shown in Figure 7, it includes a control mounting housing 201, a control motor 202, an intermediate rotating component 203, a first rotation limit switch 204, and a second rotation limit switch 205.

[0084] The working principle of the control component is as follows: the intermediate rotating component is rotated by the control motor, and the rotation of the intermediate rotating component synchronously drives the rotation of the rotary valve rod. The intermediate rotating component cooperates with the first rotation limit switch and the second rotation limit switch. By triggering the operation of the first rotation limit switch and the second rotation limit switch, the rotation angle and rotation direction of the control motor are controlled, thereby controlling the rotation angle and rotation direction of the rotary valve rod.

[0085] like Figure 2 As shown, the control mounting housing 201 is directly or indirectly disposed on the control port 105. Perhaps for ease of installation, the control mounting housing may consist of multiple detachable parts.

[0086] The connection between the control mounting housing 201 and the control port 105 is typically designed to be detachable, allowing for individual replacement of the control mounting housing 201 if it is damaged during use. Furthermore, since most other components of the control assembly are housed within the control mounting housing 201, the control assembly can be manufactured and transported separately. Assembly can then be performed by attaching the control mounting housing 201, which contains the other components of the control assembly, to the control port 105.

[0087] In one example, such as Figure 1 , 2 As shown in Figures 5, 6, and 7, the control mounting housing 201 consists of an upper control mounting housing 2011 located at the upper part and a lower control mounting housing 2012 located at the lower part. The lower control mounting housing 2012 is directly or indirectly disposed on the control port 105, and the upper control mounting housing 2011 and the lower control mounting housing 2012 are connected in a detachable manner (such as screwed connection, snap-fit ​​connection, etc.). In this way, the control motor 202, intermediate rotating component 203, first rotation limit switch 204, and second rotation limit switch 205, etc., of the control assembly can be housed within the lower control mounting housing 2012. The upper control mounting housing 2011 can function as a cover, placing the control motor 202, intermediate rotating component 203, first rotation limit switch 204, and second rotation limit switch 205, etc., within a relatively isolated area enclosed by the lower control mounting housing 2012 and the upper control mounting housing 2011. This achieves protection for the control motor 202, intermediate rotating component 203, first rotation limit switch 204, and second rotation limit switch 205, etc., of the control assembly.

[0088] Although, in practice, the rotation of the rotary valve stem could be directly controlled by the control motor, this might increase the output power requirement of the control motor, thereby increasing the torque output by the control motor to the rotary valve stem. Therefore, in one example of this control component, such as... Figure 5 , 7 As shown, a control reducer 212 can be installed between the control motor 202 and the intermediate rotating member 203. Although the speed of the rotary valve stem may decrease during control, the torque transmitted to the rotary valve stem is increased. This means that the torque output to the rotary valve stem can be increased by using the control reducer 212 without increasing the output power of the control motor. Furthermore, a control motor with relatively lower output power may have significant advantages in terms of structure, size, and economy compared to a control motor with relatively higher output power.

[0089] like Figure 5 , 6As shown in Figure 7, the first rotary limit switch 204 and the second rotary limit switch 205 are electronic components, electrically connected to the control motor 202. The positions of the first rotary limit switch 204 and the second rotary limit switch 205 are respectively: the first maximum rotational position 206 that the intermediate rotating member 203 can rotate to in one rotational direction, and the second maximum rotational position 207 that the intermediate rotating member can rotate to in another rotational direction opposite to the first rotational direction. When the intermediate rotating member 203 touches the first rotary limit switch 204 or the second rotary limit switch 205, it changes the state of the first rotary limit switch 204 or the second rotary limit switch 205. The changed state of the first rotary limit switch 204 or the second rotary limit switch 205 electrically transmits relevant information to the control motor 202, causing the control motor 202 to change its current operating state.

[0090] The reason for including this intermediate rotating component is likely one of two things. One reason could be that, since the rotary valve stem is typically rod-shaped, it cannot directly engage with the first and second rotary limit switches during rotation. Therefore, an intermediate rotating component is needed to achieve this engagement with the first and second rotary limit switches. Another reason could be that it serves as a connecting component between the rotary valve stem and the control motor or control reducer.

[0091] The intermediate rotating component is coaxially arranged with the rotating valve stem and the output end of the control motor or the output end of the control reducer to achieve synchronous rotation of the above mechanism during rotation.

[0092] For one of the reasons mentioned above. In one example, such as Figure 5 , 6 As shown in Figure 7, the intermediate rotating member 203 includes a first rotating protrusion 2031 and a second rotating protrusion 2032. The first rotating protrusion 2031 protrudes outward in a radial direction with the axis of the intermediate rotating member 203 as the center. The second rotating protrusion 2032 protrudes in another radial direction with the axis of the intermediate rotating member 203 as the center. Thus, the first rotating protrusion 2031 engages with the first rotating limit switch 204 when rotating to the first maximum rotation position 206; and the second rotating protrusion 2032 engages with the second rotating limit switch 205 when rotating to the second maximum rotation position 207.

[0093] It should also be noted that when the intermediate rotating component includes a first rotating protrusion and a second rotating protrusion, a third maximum rotation position 208 and a fourth maximum rotation position 209 also appear accordingly. Specifically, the third maximum rotation position 208 is the position of the first rotating protrusion 2031 when the second rotating protrusion 2032 rotates to the second maximum rotation position 207; the fourth maximum rotation position 209 is the position of the second rotating protrusion 2032 when the first rotating protrusion 2031 rotates to the first maximum rotation position 206.

[0094] The arrangement of the first rotating protrusion 2031 and the second rotating protrusion 2032 greatly increases the radial length of the intermediate rotating member 203, so as to facilitate its cooperation with the first rotating limit switch 204 and the second rotating limit switch 205.

[0095] For another reason mentioned above, the intermediate rotating component can be provided with irregularly shaped insertion holes for the output end of the control motor or the output end of the control reducer, as well as a portion of the rotary valve stem, to be inserted and kept synchronized during rotation. Unlike the output end of the control motor or the output end of the control reducer, which is typically made of metal (such as materials primarily composed of copper, aluminum, or zinc), the intermediate rotating component can be made of engineering plastics. Of course, it is also possible that, during manufacturing, the intermediate rotating component, the output end of the control motor or the output end of the control reducer, and the rotary valve stem can be configured as an integral part of the structure.

[0096] In one example, such as Figure 5 , 6 As shown in Figure 7, to ensure better cooperation between the first rotating protrusion 2031 and the second rotating protrusion 2032 and the first rotating limit switch 204 and the second rotating limit switch 205, the surfaces of the portions of the first rotating protrusion 2031 and the second rotating protrusion 2032 that cooperate with the first rotating limit switch 204 and the second rotating limit switch 205 can be designed as planar structures. This not only increases the contact area, but also ensures that the pressure applied by the first rotating protrusion 2031 and the second rotating protrusion 2032 to each point on the contact surface of the first rotating limit switch 204 and the second rotating limit switch 205 is basically the same during contact. This reduces the possibility that uneven force on the first rotating limit switch 204 and the second rotating limit switch 205 could prevent the switch from changing its preset state when pressure is applied by the first rotating protrusion 2031 and the second rotating protrusion 2032 to the first rotating limit switch 205. This results in the sending of incorrect information to the control motor 202.

[0097] In an example of a control component, such as Figure 5 ,6 As shown in Figure 7, to prevent the first rotating protrusion 2031 and the second rotating protrusion 2032 from engaging with the first rotating limit switch 204 and the second rotating limit switch 205, where the first rotating limit switch 204 and the second rotating limit switch 205 only require an external force sufficient to change their state without needing a large force, two rotational limiting spacers 210 are also provided. These two rotational limiting spacers 210 are respectively located at the first maximum rotation position 206 reached by the first rotating protrusion 203 and the second maximum rotation position 207 reached by the second rotating protrusion 2032. These two rotational positions are also the positions where the first rotating limit switch 204 and the second rotating limit switch 205 are located. Thus, when the first rotating protrusion 2031 and the second rotating protrusion 2032 rotate to their respective rotational positions, after cooperating with the first rotation limit switch 204 and the second rotation limit switch 205 to achieve the purpose of changing the state, although the control motor 202 receives information about the change of state from the first rotation limit switch 204 and the second rotation limit switch 205, there is a certain time difference between the control motor 202 receiving the information and changing its state. Within this time difference, the first rotating protrusion 2031 may be affected by the change of state. The inertia of the movement of the protrusion 2031 and the second rotating protrusion 2032 will continue to exert pressure on the first rotating limit switch 204 and the second rotating limit switch 205, which may easily lead to damage to the first rotating limit switch 204 and the second rotating limit switch 205. The provision of at least two of the rotating limit spacers 210 may be able to counteract the pressure exerted on the first rotating limit switch 204 and the second rotating limit switch 205 by the inertia of the movement of the first rotating protrusion 2031 and the second rotating protrusion.

[0098] In addition to the two rotation limiters being positioned as described above, such as Figure 5 , 6 As shown in Figure 7, two more rotation-limiting partitions 210 can be added. These two additional rotation-limiting partitions 210 are respectively located at the third maximum rotation position 208 reached by the first rotational protrusion 2031 and the fourth maximum rotation position 209 reached by the second rotational protrusion 2032. In this way, when the first rotational protrusion 2031 rotates to the first maximum rotation position 206 or the second rotational protrusion 2032 rotates to the second maximum rotation position 207, the intermediate rotating member 203 will be simultaneously blocked by two of the four rotation-limiting partitions 210, thus enhancing the blocking effect.

[0099] The rotating limiter can be plate-shaped or block-shaped. It can be integrally formed with the control mounting housing. If both the rotating limiter and the control mounting housing are made of plastic, they can be integrally formed through extrusion.

[0100] In an example of a control component, such as Figure 5 , 6 As shown in Figure 7, to prevent the intermediate rotating component from colliding with other components during rotation, a rotation limiting peripheral component 213 is also provided. The rotation limiting peripheral component 213 is spaced apart from the intermediate rotating component 203 so that the two will not touch.

[0101] The structure of the rotary limiting peripheral component can be plate-shaped or block-shaped, etc. It can be integrally formed with the control mounting housing. If both the rotary limiting peripheral component and the control mounting housing are made of plastic, an integral molding structure can be achieved through an extrusion process.

[0102] Indicator Components

[0103] The indicator component refers to the component used to indicate to the operator whether the rotary valve is in the open or closed state.

[0104] An example of this indicator component, such as Figure 1 , 3 As shown, it includes an indicator 301, an observation port 302, a first terminal position marker (not shown in the figure), and a second terminal position marker (not shown in the figure).

[0105] like Figure 5 As shown, the indicator 301 is directly or indirectly disposed on the intermediate rotating member 203 and rotates synchronously with the intermediate rotating member 203. When the first rotating protrusion 2031 and the second rotating protrusion 2032 are provided, the indicator 301 can be directly or indirectly disposed on the first rotating protrusion or the second rotating protrusion so as to achieve synchronous rotation with the intermediate rotating member 203.

[0106] In one example of this indicator, such as Figure 5 As shown, the indicator 301 is located on a relatively outer portion of the intermediate rotating member 203 in the radially outward direction. This means the indicator 301 is relatively far from the axis of the intermediate rotating member 203, i.e., its radius is longer. Under the same rotation angle, the range of the trajectory that the indicator 301 moves with the intermediate rotating member 203 is larger, which is beneficial for the operator's observation. When the intermediate rotating member 203 includes the first rotating protrusion 2031 and the second rotating protrusion 2032, the indicator 301 can be located on a portion of the first rotating protrusion 2031 and / or the second rotating protrusion 2032 that is far from the axis of the intermediate rotating member 301.

[0107] Furthermore, the connection between the indicator and the intermediate rotating component can be an integrally formed structure or a detachable structure (such as a plug-in structure, snap-fit ​​structure, screw-in structure, etc.). The latter structure allows the indicator to be replaced separately if damaged, without needing to be replaced along with the intermediate rotating component, thus saving on parts replacement costs.

[0108] The observation port 302 is provided on the control mounting housing 201 and cooperates with the indicator 301 for observing the indicator 301. That is, the current movement position of the indicator 301 can be observed through the observation port 302. For ease of observation, the observation port 302 can be provided on the upper side of the control mounting housing 201.

[0109] like Figure 1 , 2 As shown, when the control mounting housing 201 is composed of the control mounting upper housing 2011 and the control mounting lower housing 2012, the observation port 302 is opened on the control mounting upper housing 2011.

[0110] An example of this observation port, for ease of observation, such as Figure 1 , 3 As shown in Figure 4, the size and shape of the observation port 302 are set to be basically the same as the size and shape of the area covered by the moving trajectory of the upper end of the indicator 301.

[0111] To further facilitate observation by operators, in one example of the indicator, a portion of the indicator 301 is located within the observation port 302.

[0112] The first terminal position marker (not shown in the figure) is used to indicate the position of the indicator 301 when the intermediate rotating member 203 rotates to the first maximum rotation position 206. The second terminal position marker (not shown in the figure) is used to indicate the position of the indicator 301 when the intermediate rotating member rotates to the second maximum rotation position. The two markers cooperate with the observation port 302 and are set on both sides of the longitudinal direction of the observation port 302.

[0113] like Figure 1 , 2 As shown, when the control mounting housing 201 is composed of the control mounting upper housing 2011 and the control mounting lower housing 2012, the first terminal position indicator (not shown in the figure) and the second terminal position indicator (not shown in the figure) are also set on the control mounting upper housing 2011.

[0114] An example of a separate housing for the control unit, such as... Figure 1 ,3 As shown, it includes an upper shell top platform 20111 located at the top, which is a planar structure, and an upper shell ring-shaped portion 20112 connected to the outer edge of the upper shell top platform 20111, which is inclined downwards from the inside to the outside. This arrangement makes the upper shell top platform 20111 prominent, making it easy for operators to identify. The observation port 302, the first terminal position indicator (not shown in the figure), and the second terminal position indicator (not shown in the figure) are located on the upper shell top platform 20111 in the top central area, further facilitating observation and operation by operators.

[0115] Another example of this control unit with a separate upper housing, such as... Figure 1 , 3 As shown, a control panel 211 is also provided. The control panel 211 is located on the top platform 20111 of the upper shell. The first terminal position indicator (not shown in the figure) and the second terminal position indicator (not shown in the figure) are provided on the control panel 211. The part of the control panel 211 corresponding to the observation port 302 on the indicator component is made of transparent material (such as transparent plastic, transparent plexiglass, etc.).

[0116] The control panel 211 not only blocks the observation port 302, preventing the indicator 301 from being damaged by the external environment during movement, but also prevents the operator from being damaged by the movement of the indicator 301 during operation.

[0117] The control panel 211 may also include other markings, such as the on marking 304 and the off marking 305.

[0118] In another example of the indicator assembly, a protective sleeve (not shown) is also included, which is fitted over the upper side of the indicator 301. Thus, even if the indicator 301 collides with an external object during movement, the protective sleeve (not shown) may reduce the risk of damage to the indicator 301.

[0119] Furthermore, since the protective cover for the indicator (not shown in the figure) is detachably mounted on the indicator 301, maintenance only requires replacing the protective cover (not shown in the figure) instead of replacing the entire indicator 301. When replacing the protective cover (not shown in the figure), simply pull out the damaged protective cover (not shown in the figure) by hand and then insert a new protective cover (not shown in the figure).

[0120] The protective sleeve for the indicator (not shown in the figure) can be made of a material with a lower hardness than the mounting housing for the control, such as flexible plastic. Alternatively, an elastic material (such as latex or rubber) can be used. In this way, when the indicator 301 moves and comes into contact with other external components, the impact of the external contact on the indicator 301 is greatly reduced due to the protective sleeve (not shown in the figure).

[0121] The protective cover for the indicator (not shown in the figure) can also be coated with a specified color as needed, which further facilitates the operator's observation and operation.

[0122] In one example of the protective sleeve for the indicator, the upper end of the sleeve has an arc-shaped structure, with the bottom of the arc-shaped surface located at the top and the edge at the bottom. Specifically, the surface may be arc-shaped, such as crown-shaped or hemispherical. This significantly reduces the contact area between the indicator and the outside during movement, and even if contact occurs, the force experienced by most of the contact points on that surface is greatly reduced.

[0123] In another embodiment of the present invention, the control component further includes a Hall sensor (not shown in the figure), and correspondingly, the indicating component further includes several intermediate position markers (not shown in the figure).

[0124] A Hall effect sensor, electrically connected to the control motor, is used to detect the rotation angle and direction of the control motor. In this invention, the opening degree of the rotary valve is detected by detecting the rotation angle and direction of the control motor. That is, whether the rotary valve is in a fully open state, a fully closed state, or a state between a fully open state and a fully closed state.

[0125] Especially when the rotary valve is in a state between fully open and fully closed, those skilled in the art can determine the opening degree of the rotary valve through relevant calculations.

[0126] When the Hall sensor is provided, the indicating component may also include several intermediate position markers, which are located adjacent to the observation port and between the first terminal position marker and the second terminal position marker, and are used to cooperate with the indicating element to indicate the current opening degree of the rotary valve.

[0127] This way, the operator cannot observe whether the rotary valve is fully open or fully closed, nor can they observe the degree of opening of the rotary valve.

[0128] This not only allows the rotary valve to be opened and closed via a control motor, but also makes it possible to control the flow rate of the fluid by controlling the opening degree.

[0129] In the claims, the word "comprising" does not exclude other units or steps; the words "a" or "an" do not exclude multiple. The use of ordinal numbers such as "first" or "second" to modify a claim element does not imply that one claim element has a higher priority, order, or chronological sequence of action than another claim element, but is merely for the purpose of distinguishing one claim element from another. Although certain specific technical features are recited in different dependent claims, this does not mean that these specific technical features cannot be combined. Various aspects of this invention can be used individually, in combination, or in various arrangements not specifically discussed in the foregoing embodiments, thus not limiting its application to the details and arrangements of the components described above or shown in the drawings. For example, multiple aspects described in one embodiment can be combined in any way with multiple aspects described in other embodiments. Steps, functions, or features recited in multiple modules or units can be performed or satisfied by one module or unit. The steps of the methods disclosed herein are not limited to being performed in any particular order; it is possible to perform some or all of the steps in other orders. Any reference numerals in the claims should not be construed as limiting the scope of the claims.

[0130] Although the present invention has been described by way of accompanying drawings and embodiments, such description and illustration should be considered illustrative or exemplary rather than restrictive. Those skilled in the art will recognize that various modifications, additions, and substitutions are possible without departing from the scope and spirit of the present invention as disclosed in the appended claims.

Claims

1. An electric rotary valve, characterized in that, The rotary valve includes: The valve body has a valve cavity inside it; A fluid inlet is located on the valve body and communicates with the valve cavity; A fluid outlet is located on the valve body and communicates with the valve cavity; A control port is located on the valve body and communicates with the valve cavity; A rotary valve core is located inside the valve chamber, and the fluid in the valve chamber can be allowed to flow or blocked by rotating the rotary valve core; A rotary valve stem is connected to the rotary valve core; A control component, located at the control port, enables rotational control of the rotary valve stem via the control port, including: A mounting housing for control is provided on the control port; A control motor is mounted on the control housing; An intermediate rotating component is disposed between the control motor and the rotary valve stem, and is used to drive the rotary valve stem to rotate synchronously under the drive of the control motor; A first rotary limit switch, electrically connected to the control motor and cooperating with the intermediate rotating component, is used to limit the intermediate rotating component to a first maximum rotational position that it can rotate to in a rotational direction; and A second rotary limit switch, electrically connected to the control motor and cooperating with the intermediate rotating component, is used to limit the intermediate rotating component to a second maximum rotational position that it can reach when rotating in a direction opposite to the first rotational direction; and An indicating component, cooperating with the intermediate rotating member, indicates the open or closed state of the rotary valve core according to the first maximum rotation position or the second maximum rotation position reached by the intermediate rotating member, including: An indicator element, directly or indirectly disposed on the intermediate rotating member, rotates synchronously with the intermediate rotating member; and An observation port is provided on the control mounting housing and is used in conjunction with the indicator to observe the indicator. A first terminal position indicator is provided on the outer surface of the control mounting housing and adjacent to the observation port, for indicating the position of the indicator when the intermediate rotating member rotates to the first maximum rotation position; The second terminal position indicator is provided on the outer surface of the control mounting housing and on the other side corresponding to the observation port, and is used to indicate the position of the indicator when the intermediate rotating member rotates to the second maximum rotation position.

2. The electric rotary valve according to claim 1, characterized in that, The intermediate rotating component includes: The first rotating protrusion protrudes outward in a radial direction, centered on the axis of the intermediate rotating member; The second rotating protrusion protrudes out in another radial direction with the axis on the intermediate rotating member as the center; The first rotating protrusion engages with the first rotating limit switch when it rotates to the first maximum rotating position; the second rotating protrusion engages with the second rotating limit switch when it rotates to the second maximum rotating position.

3. The electric rotary valve according to claim 2, characterized in that: in, The surface of the portion of the first rotating protrusion that mates with the first rotating limit switch is a flat surface. The surface of the portion of the second rotating protrusion that engages with the second rotating limit switch is a plane.

4. The electric rotary valve according to any one of claims 1 to 3, characterized in that, Also includes: At least two rotation limiters cooperate with the intermediate rotating component and are respectively located at the first maximum rotation position and the second maximum rotation position.

5. The electric rotary valve according to any one of claims 1 to 3, characterized in that, The indicator component also includes: A protective sleeve is fitted over the upper end of the indicator. A portion of the protective sleeve for indicating the device moves into the observation port as the intermediate rotating component rotates.

6. The electric rotary valve according to claim 5, characterized in that: The upper end of the protective sleeve for indicating is an arc-shaped structure, with the bottom of the arc-shaped surface located at the top and the edge located at the bottom.

7. The electric rotary valve according to any one of claims 1 to 3, characterized in that: The size and shape of the observation port are basically the same as the size and shape of the area covered by the moving trajectory of the upper end of the indicator.

8. The electric rotary valve according to any one of claims 1 to 3, characterized in that: The control component also includes: A Hall sensor, electrically connected to the control motor, is used to detect the rotation angle of the control motor; The indication component further includes: Several intermediate position markers are provided on the outer surface of the control mounting housing and located between the first terminal position marker and the second terminal position marker, for indicating the opening degree of the electric rotary valve.

9. The electric rotary valve according to any one of claims 1 to 3, characterized in that: The control mounting housing includes: Control unit mounting shell; and The lower housing for control is directly or indirectly mounted on the control port, and its upper part is detachably connected to the upper housing for control. The control component and the indicator in the indicator component are directly or indirectly disposed on the lower housing of the control assembly; the observation port, the first terminal position mark and the second terminal position mark on the indicator component are disposed on the upper side of the upper housing of the control assembly.

10. The electric rotary valve according to claim 9, characterized in that, The upper side of the control mounting housing includes: The top of the upper shell is a planar structure; and The ring-shaped part of the upper shell is connected to the outer edge of the top platform of the upper shell and is inclined downward from the inside to the outside. The observation port, the first terminal position marker, and the second terminal position marker on the indicator component are located on the top platform of the upper shell.

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