A valve opening detection device

Abstract

The present invention provides a valve opening detection device, comprising: a transmission assembly and an opening indicator disk. The transmission assembly includes an indicator component and a transmission component, the indicator component being connected to the transmission component and movable along an extension direction of the transmission component. The transmission component is connected to a valve servo synchronization device so that the transmission component rotates with rotation of the valve servo synchronization device. The extension direction of the opening indicator disk is consistent with the extension direction of the transmission component. The opening indicator disk is provided with an opening mark, the indicator component corresponds to the opening mark, and the value on the opening indicator disk represents the valve opening. The valve opening detection device of the present invention has the advantages of simple structure and high detection accuracy.

Description

Technical Field

[0001] This invention relates to the field of valve operation and maintenance technology, specifically to a valve opening detection device. Background Technology

[0002] Large hydro-generators are equipped with cylinder valves in the turbine room. These cylinder valves serve as the turbine's inlet valves, installed between the fixed and movable guide vanes. They can be used as the main valve of the unit, lowered when the unit is shut down to reduce water leakage from the guide vanes, and used to cut off the water flow in case of an accident. They also function as emergency shutdown valves.

[0003] In related technologies, hydropower station cylinder valve systems are usually equipped with electrical encoders to detect the opening degree. However, monitoring the opening degree solely through an electrical encoder is a single measurement method. When the encoder malfunctions, the valve opening degree is lost, making it impossible to accurately determine information such as the valve opening degree. If the measuring device is inaccurate, it is impossible to determine whether the valve is fully open or fully closed, which can easily lead to safety hazards in equipment operation. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, embodiments of the present invention provide a valve opening detection device, which has the advantages of simple structure and high detection accuracy.

[0006] The valve opening detection device according to an embodiment of the present invention includes:

[0007] A transmission assembly, comprising an indicating component and a transmission component, wherein the indicating component is connected to the transmission component and is movable along the extending direction of the transmission component, and the transmission component is connected to a valve servo synchronizer so that the transmission component rotates with the rotation of the valve servo synchronizer.

[0008] An opening indicator disc extends in the same direction as the transmission component. The opening indicator disc has an opening mark, and the indicator component corresponds to the opening mark. The value on the opening indicator disc represents the valve opening.

[0009] The valve opening detection device of this invention connects the valve to an opening indicator panel via a transmission assembly, so that the current valve opening degree is intuitively displayed through the values ​​and markings on the opening indicator panel, facilitating quick understanding and judgment by the operator. Furthermore, the opening indicator panel can be easily calibrated as needed to ensure the accuracy of the indication.

[0010] In some embodiments, the valve opening detection device of the present invention further includes a stroke control component, which is arranged adjacent to the opening indicator panel. The stroke control component includes a first limit switch and a second limit switch. The first limit switch corresponds to the fully closed opening mark of the opening indicator panel, and the second limit switch corresponds to the fully open opening mark of the opening indicator panel. At least a portion of the indicating component is in contact with one of the first limit switch and the second limit switch, and the stroke control component emits a feedback signal.

[0011] In some embodiments, there are multiple second limit switches, which are arranged at intervals orthogonal to the extension direction of the transmission assembly.

[0012] In some embodiments, the transmission component includes a connector and a transmission component, the connector being connected to the valve relay synchronization device, and the indicating component being connected to the transmission component.

[0013] In some embodiments, the connector is connected to the valve relay synchronization device via a chain, and the indicating component is connected to the transmission component via a thread.

[0014] In some embodiments, the transmission component further includes a first bearing support and a second bearing support, wherein the first bearing support is connected to a first end of the transmission component and the second bearing support is connected to a second end of the transmission component.

[0015] In some embodiments, the indicating component includes a connecting portion and an indicating portion, the connecting portion being connected to the transmission member and located between the first bearing support and the second bearing support in the extending direction of the transmission assembly, and the indicating portion extending in a direction away from the connecting portion and pointing towards the opening indicator disc.

[0016] In some embodiments, the valve opening detection device of the present invention further includes a guide member connected to the opening indicator disk. The extension direction of the guide member is consistent with the extension direction of the opening indicator disk and is located on the side of the opening indicator disk adjacent to the transmission assembly. The indicator portion is connected to the guide member and is movable relative to the guide member along the extension direction of the guide member.

[0017] In some embodiments, the valve opening detection device of the present invention further includes an early warning component. The early warning component includes a first detection part and a second detection part. The first detection part is connected to the indicator part and is located on the side of the indicator part adjacent to the opening indicator disk. The second detection part is connected to the opening indicator disk. There are multiple second detection parts, which are arranged at intervals along the extension direction of the opening indicator disk. The first detection part is adjacent to the second detection part. The early warning component issues a warning signal.

[0018] In some embodiments, the valve opening detection device of the present invention further includes a limiting component, the limiting component being connected to the guide member, the limiting component including a first limiting component and a second limiting component, the first limiting component being connected to a first end of the guide member, and the first limiting component being located below the fully closed opening mark in the extension direction of the opening indicator disc, the second limiting component being connected to a second end of the guide member, and the second limiting component being located above the fully open opening mark in the extension direction of the opening indicator disc. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the valve opening detection device according to an embodiment of the present invention.

[0020] Figure 2 yes Figure 1 An enlarged schematic diagram of A shown in the figure.

[0021] Figure label:

[0022] 1. Transmission assembly; 11. Indicating component; 111. Connecting part; 112. Indicating part; 12. Transmission assembly; 121. Connecting piece; 122. Transmission component; 123. First bearing support; 124. Second bearing support.

[0023] 2. Opening indicator panel; 21. Opening mark.

[0024] 3. Limit control components, 31. First limit switch, 32. Second limit switch,

[0025] 4. Guide components,

[0026] 5. Early warning component; 51. First detection unit; 52. Second detection unit;

[0027] 6. Limiting component; 61. First limiting component; 62. Second limiting component; 63. Elastic component. Detailed Implementation

[0028] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0029] like Figure 1 and Figure 2 As shown, the valve opening detection device of this embodiment includes: a transmission assembly 1 and an opening indicator 2.

[0030] The transmission assembly 1 includes an indicating component 11 and a transmission component 12. The indicating component 11 is connected to the transmission component 12 and is movable along the extension direction of the transmission component 12. The transmission component 12 is connected to a valve servo synchronizer so that the transmission component 12 rotates with the rotation of the valve servo synchronizer. The extension direction of the opening indicator 2 is consistent with the extension direction of the transmission component 12. The opening indicator 2 is provided with an opening mark 21, and the indicating component 11 corresponds to the opening mark 21. The value on the opening indicator 2 represents the valve opening degree.

[0031] Specifically, such as Figure 1 and Figure 2 As shown, the extension direction of the transmission component 12 is consistent with the vertical direction, and the indicating component 11 is movable relative to the rotating component in the vertical direction. The transmission component 12 is connected to the valve's servo synchronization device, ensuring that the transmission component 12 can follow the movement of the servo synchronization device, and thus synchronize with the movement of the valve. The indicating component 11 is connected to the transmission component 12 and can move in the extension direction of the transmission component 12. Therefore, when the transmission component 12 moves with the opening and closing of the valve, the indicating component 11 will also move accordingly. Thus, the valve opening degree can be read according to the opening degree mark 21 on the opening degree indicator panel 2 pointed to by the indicating component 11.

[0032] Optionally, the valve opening detection device of this embodiment can also be combined with an electrical encoder, that is, the transmission component 1 provides another independent monitoring method, increasing the redundancy of valve opening monitoring. In other words, through the transmission component 1, even if the electrical encoder fails, the actual valve opening can still be monitored mechanically, thereby improving the reliability of the system.

[0033] In other words, the valve opening detection device of this embodiment connects the valve to the opening indicator panel 2 via the transmission assembly 1, so that the current valve opening is displayed intuitively through the values ​​and markings on the opening indicator panel 2, facilitating quick understanding and judgment by the operator. Furthermore, the opening indicator panel 2 can be easily calibrated as needed to ensure the accuracy of the indication.

[0034] In some embodiments, the valve opening detection device of the present invention further includes a stroke control component 3, which is arranged adjacent to the opening indicator 2. The stroke control component 3 includes a first stroke switch 31 and a second stroke switch 32. The first stroke switch 31 corresponds to the fully closed opening mark 21 on the opening indicator 2, and the second stroke switch 32 corresponds to the fully open opening mark 21 on the opening indicator 2. At least a portion of the indicating component 11 contacts one of the first stroke switch 31 and the second stroke switch 32, and the stroke control component 3 sends a feedback signal.

[0035] Specifically, such as Figure 1 and Figure 2 As shown, the stroke control component 3 is arranged adjacent to the opening indicator panel 2 to ensure that the stroke control component 3 can accurately correspond to the fully closed and fully open opening marks 21 on the opening indicator panel 2. The stroke control component 3 includes two limit switches, namely a first limit switch 31 and a second limit switch 32. The first limit switch 31 is located below the indicating component 11, and the second limit switch 32 is located above the indicating component 11.

[0036] The first limit switch 31 corresponds to the fully closed opening mark 21 on the opening indicator panel 2 (i.e., the opening is 0%). When the indicator component 11 moves to the fully closed position, the first limit switch 31 will be triggered. The second limit switch 32 corresponds to the fully open opening mark 21 on the opening indicator panel 2 (i.e., the opening is 100%). When the indicator component 11 moves to the fully open position, the second limit switch 32 will be triggered.

[0037] In other words, when the indicator component 11 moves downward and the lower part of the indicator component 11 contacts the first limit switch 31, the stroke control component 3 will send a fully closed signal and feed it back to the valve monitoring system; similarly, when the indicator component 11 moves upward and the upper part of the indicator component 11 contacts the second limit switch 32, the stroke control component 3 will send a fully open signal and feed it back to the valve monitoring system.

[0038] Therefore, the limit switch configuration of the valve opening detection device in this embodiment of the invention ensures that the system receives a clear feedback signal when the valve reaches the fully open or fully closed position, thereby accurately locating the valve's opening state. Furthermore, through the feedback signal from the limit switch, the system can monitor the valve's movement in real time, preventing the valve from exceeding the preset safety range and protecting the equipment from damage. The limit switch feedback signal can be used in automated control systems to achieve automatic valve opening and closing control, improving the level of automation and efficiency of operation. In addition, when the limit switch is not triggered as expected, the system can assume that there may be a problem with the valve's opening state, thereby triggering a fault warning mechanism to remind operators to inspect and maintain the valve.

[0039] Preferably, there are multiple second limit switches 32, and the multiple second limit switches 32 are arranged at intervals orthogonal to the extending direction of the transmission assembly 1. It is understood that, as Figure 1 and Figure 2 As shown, the extension direction of the transmission assembly 1 is consistent with the left-right direction, and multiple second limit switches 32 are arranged sequentially at intervals along the left-right direction. Therefore, by setting multiple second limit switches 32, the system's accuracy in detecting valve opening can be improved.

[0040] Optionally, there may be multiple first limit switches 31.

[0041] In some embodiments, the transmission component 12 includes a connector 121 and a transmission component 122. The connector 121 is connected to the valve relay synchronization device, and the indicating component 11 is connected to the transmission component 122.

[0042] Specifically, such as Figure 1 and Figure 2 As shown, the connector 121 is connected to the upper end of the transmission component 122 and is connected to the valve servo synchronizer. The indicating component 11 is connected to the transmission component 122 and can move vertically relative to the transmission component 122. That is, the connector 121 is connected to the valve servo synchronizer, so that the rotation of the valve can drive the connector 121 to rotate, and the rotation of the connector 121 drives the transmission component 122 to rotate, thereby causing the indicating component 11 to move vertically on the transmission component 122.

[0043] Optionally, the connector 121, the transmission component 122, and the indicating component 11 can be connected by means of gear and rack transmission, lead screw transmission, synchronous belt transmission, chain transmission, and screw transmission to realize the movement function of the indicating component 11.

[0044] In some embodiments, the connector 121 is connected to the valve relay synchronization device via a chain, and the indicator component 11 is connected to the transmission component 122 via a thread.

[0045] It is understandable that, such as Figure 1 and Figure 2 As shown, the connector 121 is a sprocket. The connector 121 is connected to the valve relay synchronization device through a chain so that the valve rotation drives the connector 121 to rotate through the chain drive. The rotation of the connector 121 drives the transmission component 122 to rotate. Since the indicating component 11 is connected to the transmission component 122 through a thread, the indicating component 11 can move in the vertical direction on the transmission component 122.

[0046] In other words, the transmission component 122 and the indicator component 11 can be connected by linear transmission, that is, the transmission component 122 and the indicator component 11 form a linear module, so that the rotation of the transmission component 122 can cause the indicator component 11 to move in the up and down direction.

[0047] In some embodiments, the transmission component 12 further includes a first bearing support 123 and a second bearing support 124, wherein the first bearing support 123 is connected to the first end of the transmission component 122 and the second bearing support 124 is connected to the second end of the transmission component 122.

[0048] Specifically, such as Figure 1 and Figure 2 As shown, the first bearing support 123 is located below the second bearing support 124. The first bearing support 123 is connected to the lower end of the transmission component 122 (i.e., the first end of the transmission component 122), and the second bearing support 124 is connected to the upper end of the transmission component 122. In other words, the transmission component 122 is connected to the first bearing support 123 and the second bearing support 124 via bearing components, providing stable support for the transmission component 122 and preventing it from wobbling or shifting during movement, thus ensuring the accuracy of the movement. The bearing support typically contains a bearing to reduce friction between the transmission component 122 and the support, reducing wear and improving transmission efficiency. Furthermore, the bearing support also ensures the precise movement of the transmission component 122.

[0049] In some embodiments, the indicating member 11 includes a connecting portion 111 and an indicating portion 112. The connecting portion 111 is connected to the transmission member and is located between the first bearing support 123 and the second bearing support 124 in the extending direction of the transmission assembly 1. The indicating portion 112 extends in a direction away from the connecting portion 111 and points towards the opening indicator disk 2.

[0050] It is understood that the connecting part 111 is connected to the transmission component, which is the part of the transmission assembly 1 responsible for rotation, such as a gear or a lead screw. The connecting part 111 is located between the first bearing support 123 and the second bearing support 124, and the bearing support provides support for the transmission component 122, ensuring that the connecting part 111 can move stably between the first bearing support 123 and the second bearing support 124.

[0051] The indicator 112 is an extension of the connecting part 111, and extends toward the opening indicator dial 2. The indicator 112 is a part that can visually display or indicate the valve opening. When the indicator 112 points to the scale of the opening indicator dial 2, the valve opening can be visually displayed.

[0052] In some embodiments, the valve opening detection device of the present invention further includes a guide member 4, which is connected to the opening indicator disk 2. The extension direction of the guide member 4 is consistent with the extension direction of the opening indicator disk 2 and is located on the side of the opening indicator disk 2 adjacent to the transmission assembly 1. The indicator part 112 is connected to the guide member 4 and is movable relative to the guide member 4 along the extension direction of the guide member 4.

[0053] It is understandable that, such as Figure 1 and Figure 2 As shown, the upper and lower ends of the guide member 4 are connected to the opening indicator disk 2, and its extension direction is consistent with the extension direction of the opening indicator disk 2. The guide member 4 is usually located on the side of the opening indicator disk 2 adjacent to the transmission assembly 1, which ensures that the movement of the indicator part 112 is synchronized with the operation of the transmission assembly 1. The indicator part 112 is connected to the guide member 4 and can move relative to the guide member 4 in the extension direction of the guide member 4. This allows the indicator part 112 to move smoothly along the guide member 4 under the drive of the transmission assembly 1.

[0054] In other words, the design of the guide 4 ensures that the indicator 112 maintains the correct orientation during movement, avoiding deviations caused by external interference or errors. The guide 4 restricts the movement trajectory of the indicator 112, thereby improving the accuracy of the indicator 112's movement on the opening indicator disk 2. The guide 4 can also serve as a sliding or rolling surface, reducing friction and wear of the indicator 112 during movement and extending its service life.

[0055] In some embodiments, the valve opening detection device of the present invention further includes an early warning component 5. The early warning component 5 includes a first detection part 51 and a second detection part 52. The first detection part 51 is connected to the indicator part 112 and is located on the side of the indicator part 112 adjacent to the opening indicator disk 2. The second detection part 52 is connected to the opening indicator disk 2. There are multiple second detection parts 52, and the multiple second detection parts 52 are arranged at intervals along the extension direction of the opening indicator disk 2. When the first detection part 51 is adjacent to the second detection part 52, the early warning component 5 issues a warning signal.

[0056] Understandably, the first detection unit 51 is connected to the indicator unit 112 and is located on the side of the indicator unit 112 adjacent to the opening indicator dial 2. The function of the first detection unit 51 is to detect the position of the indicator unit 112, typically used to determine whether the indicator unit 112 has reached a preset limit position or an abnormal position. The second detection unit 52 is connected to the opening indicator dial 2 and consists of multiple detection units. These detection units are arranged at intervals along the extension direction of the opening indicator dial 2 and are used to detect specific positions on the opening indicator dial 2 (such as those adjacent to the fully open or fully closed values). The warning component 5 integrates the signals from the first detection unit 51 and the second detection unit 52, and when an abnormality is detected, the warning component 5 will issue a warning signal.

[0057] In other words, when the indicator component 11 is about to approach the fully open or fully closed value on the opening indicator panel 2 during the movement of the indicator component 11, the first detection unit 51 will interact with the corresponding second detection unit 52 and transmit the interaction signal to the warning component 5. Then, the warning component 5 can issue a warning signal to remind the operator that the valve is about to be fully opened or fully closed, thereby providing timely warnings when the valve opening is abnormal or the equipment malfunctions, thus enhancing the safety of the system.

[0058] In some embodiments, the valve opening detection device of the present invention further includes a limiting component 6, which is connected to the guide 4. The limiting component 6 includes a first limiting component 61 and a second limiting component 62. The first limiting component 61 is connected to the first end of the guide 4 and is located below the fully closed opening mark 21 in the extending direction of the opening indicator 2. The second limiting component 62 is connected to the second end of the guide 4 and is located above the fully open opening mark 21 in the extending direction of the opening indicator 2.

[0059] The limiting component 6 is connected to the guide 4 and located at both ends of the guide 4. The first limiting component 61 is connected to the first end (lower end) of the guide 4 and is located below the fully closed opening mark 21 in the extension direction of the opening indicator 2. When the indicating component 11 reaches the fully closed position, the first limiting component 61 will prevent the indicating component 11 from moving further, thus playing a limiting role.

[0060] The second limiting member 62 is connected to the second end (upper end) of the guide member 4, and it is located above the fully open mark 21 in the extension direction of the opening indicator disk 2. When the indicating member 11 reaches the fully open position, the second limiting member 62 will prevent the indicating member 11 from moving further, thus playing a limiting role.

[0061] In other words, the limiting component 6 can prevent the indicating component 11 from exceeding the predetermined opening range, thereby avoiding equipment damage or accidents caused by excessive or insufficient opening. By precisely setting the positions of the first limiting member 61 and the second limiting member 62, it can be ensured that the indicating component 11 can be accurately positioned in the fully closed and fully open positions.

[0062] In addition, preferably, the limiting component 6 also includes an elastic element 63. The first limiting element 61 and the second limiting element 62 are both fitted on the guide element 4, and the first limiting element 61 is connected to the lower end of the guide element 4 with an elastic element 63. The second guide element 4 is also connected to the upper end of the guide element 4 with an elastic element 63, so that when the indicating component 11 moves to a value exceeding the fully open or fully closed position, the indicating component 11 is prevented from being squeezed and thus deformed or broken.

[0063] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0064] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0065] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0066] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0067] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0068] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A valve opening detection device, characterized in that, include: A transmission assembly, comprising an indicating component and a transmission component, wherein the indicating component is connected to the transmission component and is movable along the extending direction of the transmission component, and the transmission component is connected to a valve servo synchronizer so that the transmission component rotates with the rotation of the valve servo synchronizer. An opening indicator disc extends in the same direction as the transmission component. The opening indicator disc has an opening mark, and the indicating component corresponds to the opening mark. The value on the opening indicator disc represents the valve opening. It also includes a stroke control component arranged adjacent to the opening indicator panel. The stroke control component includes a first stroke switch and a second stroke switch. The first stroke switch corresponds to the fully closed opening mark of the opening indicator panel, and the second stroke switch corresponds to the fully open opening mark of the opening indicator panel. At least a portion of the indicating component is in contact with one of the first stroke switch and the second stroke switch. The stroke control component emits a feedback signal. There are multiple second limit switches, and the multiple second limit switches are arranged at intervals orthogonal to the extension direction of the transmission assembly; The transmission component includes a connector and a transmission component. The connector is connected to the valve relay synchronization device, and the indicating component is connected to the transmission component.

2. The valve opening detection device according to claim 1, characterized in that, The connector is connected to the valve relay synchronization device via a chain, and the indicating component is connected to the transmission component via a thread.

3. The valve opening detection device according to claim 2, characterized in that, The transmission component further includes a first bearing support and a second bearing support, wherein the first bearing support is connected to a first end of the transmission component and the second bearing support is connected to a second end of the transmission component.

4. The valve opening detection device according to claim 3, characterized in that, The indicating component includes a connecting portion and an indicating portion. The connecting portion is connected to the transmission member and is located between the first bearing support and the second bearing support in the extending direction of the transmission assembly. The indicating portion extends away from the connecting portion and points towards the opening indicator disc.

5. The valve opening detection device according to claim 4, characterized in that, It also includes a guide member connected to the opening indicator disk. The guide member extends in the same direction as the opening indicator disk and is located on the side of the opening indicator disk adjacent to the transmission assembly. The indicator portion is connected to the guide member and is movable relative to the guide member along the extension direction of the guide member.

6. The valve opening detection device according to claim 5, characterized in that, It also includes a warning component, which includes a first detection unit and a second detection unit. The first detection unit is connected to the indicator unit and is located on the side of the indicator unit adjacent to the opening indicator disk. The second detection unit is connected to the opening indicator disk. There are multiple second detection units, which are arranged at intervals along the extension direction of the opening indicator disk. The first detection unit is adjacent to the second detection unit. The warning component issues a warning signal.

7. The valve opening detection device according to claim 6, characterized in that, It also includes a limiting component connected to the guide member. The limiting component includes a first limiting member and a second limiting member. The first limiting member is connected to a first end of the guide member and is located below the fully closed opening mark in the extension direction of the opening indicator. The second limiting member is connected to a second end of the guide member and is located above the fully open opening mark in the extension direction of the opening indicator.

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