Feedback device, disc valve assembly and disc valve monitoring system

Abstract

The utility model discloses a feedback device, a disk valve assembly and a disk valve monitoring system, which can flexibly adjust the total length of a fixed sleeve and a connecting rod, so that the feedback device can be applied to disk valves of various sizes (calibers). The feedback device comprises a valve feedback device (11) and a length adjustment assembly. The length adjustment assembly comprises a fixed sleeve (1102), a connecting rod (1104) and a positioning pin (1107); the fixed sleeve (1102) is fixed on a rocker arm (2) of the disk valve, and a plurality of first connecting holes (1103) are arranged on the outer wall of the fixed sleeve (1102), and the plurality of first connecting holes (1103) are arranged in sequence along the extension direction of the fixed sleeve (1102); one end of the connecting rod (1104) is hinged to the rotating shaft of the valve feedback device (11), and the other end is slidably arranged in the fixed sleeve (1102), so that the length of the connecting rod (1104) extending out of the fixed sleeve (1102) is adjustable.

Description

Technical Field

[0001] The utility model specifically relates to a feedback device, a disc valve component and a disc valve monitoring system. Background Art

[0002] In the field of chemical production, production media are diverse and complex. In special production conditions such as acid-base corrosive environments, viscous media, and granular powdery media, production accidents caused by damage to measuring instruments and equipment due to corrosion, erosion, and wear of production media often occur. Therefore, the equipment and measuring instruments used in these conditions have higher requirements for design selection and installation location.

[0003] The main raw material in polysilicon production is silicon powder with a Rockwell hardness of 65-75. The scouring during the transmission of silicon powder can easily lead to pipeline thinning and leakage, equipment damage, and pipeline valve blockage due to silicon powder often occurs. The particularity of silicon powder also leads to a high failure rate of instrument valve accessories, which is also a bottleneck problem restricting the smooth operation of polysilicon.

[0004] Considering the characteristics of silicon powder, in the pipeline containing silicon powder, the prior art generally uses a disc valve to cut off the pipeline. Figure 1 As shown, the disc valve includes a valve actuator 1, a rocker arm 2, a valve disc 3 and a valve body 4. The valve disc 3 is provided with a valve disc drive shaft 301, the rocker arm 2 is connected to the valve disc drive shaft 301, the end of the rocker arm 2 away from the valve disc 3 is movably connected to the output end of the valve actuator 1, the end of the valve actuator 1 away from the rocker arm 2 is movably connected to a support seat 10, and the support seat 10 is fixedly connected to the valve body 4. When the valve actuator 1 is working, the valve actuator 1 drives the rocker arm 2 to move (the motion trajectory is Figure 1 The rocker arm 2 drives the valve disc drive shaft 301 to rotate, and the valve disc drive shaft 301 drives the valve disc 3 to rotate, thereby realizing the on-off of the material in the pipeline.

[0005] In order to detect the switch state of the disc valve, a valve feedback device is required to detect the movement position of the rocker arm 2. In the prior art, a first connecting rod is welded on the rotating shaft of the valve feedback device, and a second connecting rod is welded on the rocker arm 2. The first connecting rod is connected to the second connecting rod. When the rocker arm 2 rotates, the second connecting rod and the first connecting rod drive the rotating shaft of the valve feedback device to rotate, thereby realizing the detection of the movement position of the rocker arm 2. In this case, the lengths of the second connecting rod and the first connecting rod are both fixed, resulting in that when the valve feedback device with this fixing method is applied to disc valves of other sizes (calibers), the second connecting rod and the first connecting rod of other lengths need to be replaced to achieve fixation with the rocker arm 2, which reduces the versatility of the valve feedback device. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a feedback device, a disc valve assembly and a disc valve monitoring system in view of the above-mentioned deficiencies in the prior art, which can flexibly adjust the total length of the fixed sleeve and the connecting rod so that the feedback device can be applied to disc valves of various sizes (calibers).

[0007] In the first aspect, an embodiment of the utility model provides a feedback device for a disc valve, the feedback device comprising a valve feedback device and a length adjustment assembly. The valve feedback device is fixed on the valve body of the disc valve. The length adjustment assembly comprises a fixed sleeve, a connecting rod and a positioning pin; the fixed sleeve is fixed on the rocker arm of the disc valve, and a plurality of first connecting holes are arranged on the outer wall of the fixed sleeve, and the plurality of first connecting holes are arranged in sequence along the extension direction of the fixed sleeve; one end of the connecting rod is hinged to the rotating shaft of the valve feedback device, and the other end is slidably arranged in the fixed sleeve, so that the length of the connecting rod extending out of the fixed sleeve is adjustable, and a positioning hole is arranged on the outer wall of the connecting rod; the positioning pin passes through one of the first connecting holes and then extends into the positioning hole of the connecting rod to fix the connecting rod in the fixed sleeve.

[0008] In some embodiments, the connecting rod is hinged to the rotating shaft of the valve feedback device through a hinge.

[0009] In some embodiments, the hinge is a ball joint.

[0010] In some embodiments, the feedback device further comprises a fixed block and a stopper. The fixed block is fixedly connected to the second end of the hinge, a fixed groove is provided on the fixed block, and the fixed block is sleeved on the rotating shaft of the valve feedback device through the fixed groove. The stopper passes through the fixed block and abuts against the rotating shaft of the valve feedback device to fix the fixed block on the rotating shaft of the valve feedback device.

[0011] In some embodiments, the feedback device further comprises a fixed column, wherein a first end of the fixed column is fixed to the fixed sleeve, and a second end of the fixed column is fixed to the rocker arm of the disc valve.

[0012] In some embodiments, there are multiple positioning holes on the connecting rod, and the multiple positioning holes are arranged in sequence along the extension direction of the connecting rod.

[0013] In some embodiments, the first distance L between the centers of any two adjacent first connection holes is the same, and the second distance L between the centers of any two adjacent positioning holes is the same.

[0014] In some embodiments, the first distance L1 satisfies: 10 mm ≤ L1 ≤ 30 mm; and the second distance L2 satisfies: 10 mm ≤ L1 ≤ 30 mm.

[0015] Therefore, in the feedback device provided by the embodiment of the utility model, the length adjustment component includes a fixed sleeve, a connecting rod and a positioning pin. By fixing the fixed sleeve on the rocker arm of the disc valve, one end of the connecting rod is hinged with the rotating shaft of the valve feedback device. When the rocker arm of the disc valve rotates, it can drive the connecting rod and the fixed sleeve to move, thereby driving the rotating shaft of the valve feedback device to rotate. After that, the rotation of the rocker arm of the disc valve can be obtained according to the rotation of the rotating shaft of the valve feedback device, thereby obtaining the open and closed state of the disc valve. By sliding the connecting rod in the fixed sleeve, the length of the connecting rod extending out of the fixed sleeve can be adjusted, so that the total length of the fixed sleeve and the connecting rod can be flexibly adjusted, so that the feedback device can be applied to disc valves of various sizes and calibers, thereby improving the versatility of the feedback device.

[0016] In a second aspect, an embodiment of the utility model provides a disc valve assembly, which includes a disc valve and the feedback device in the first aspect. The disc valve includes a valve body, a valve disc, a rocker arm, and a valve actuator. The fixed sleeve of the feedback device is fixed on the rocker arm of the disc valve, and the valve feedback device of the feedback device is fixed on the valve body of the disc valve.

[0017] In a third aspect, an embodiment of the utility model provides a disk valve monitoring system, which includes the disk valve assembly, a controller and a display in the second aspect. The controller is electrically connected to the valve feedback device of the feedback device, and is used to receive a detection signal of the valve feedback device including the open and closed state of the disk valve, convert it into a display signal including the open and closed state of the disk valve, and output it to the display. The display is used to display after receiving the display signal.

[0018] The disc valve assembly and disc valve monitoring system provided by the embodiments of the present invention have the same beneficial effects as the above-mentioned feedback device, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 : A schematic diagram of a disc valve assembly provided by an embodiment of the utility model;

[0020] Figure 2 : A schematic diagram of a feedback device provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0022] Embodiment 1:

[0023] like Figure 2 As shown, the embodiment of the utility model provides a feedback device, which is applied to a disc valve and is used to detect the open and closed state of the disc valve. Figure 1 and Figure 2 The feedback device includes a valve feedback device 11 and a length adjustment component. The valve feedback device 11 is fixed on the valve body 4 of the disc valve, and is used to obtain the rotation of the rocker arm 2 of the disc valve according to the rotation of its rotating shaft, so as to obtain the opening and closing state of the disc valve. The length adjustment component includes a fixed sleeve 1102, a connecting rod 1104 and a positioning pin 1107. The fixed sleeve 1102 is fixed on the rocker arm 2 of the disc valve, and a plurality of first connecting holes 1103 are arranged on the outer wall of the fixed sleeve 1102, and the plurality of first connecting holes 1103 are arranged in sequence along the extension direction of the fixed sleeve 1102. One end of the connecting rod 1104 is hinged to the rotating shaft of the valve feedback device 11, and the other end is slidably arranged in the fixed sleeve 1102, so that the length of the connecting rod 1104 extending out of the fixed sleeve 1102 is adjustable, and a positioning hole is arranged on the outer wall of the connecting rod 1104. The positioning pin 1107 passes through a first connecting hole 1103 and then extends into the positioning hole of the connecting rod 1104 to fix the connecting rod 1104 in the fixing sleeve 1102 .

[0024] Exemplarily, a support seat 10 is fixed on the valve body 4 , and the valve feedback device 11 is installed on the support seat 10 of the disc valve.

[0025] When the rocker arm 2 of the disc valve rotates, it can drive the connecting rod 1104 and the fixed sleeve 1102 to move, thereby driving the rotating shaft of the valve feedback device 11 to rotate. The valve feedback device 11 outputs a detection signal according to the rotation angle of its rotating shaft. The opening and closing state of the disc valve can be obtained by processing the detection signal.

[0026] Exemplarily, the materials of the fixed sleeve 1102, the connecting rod 1104 and the positioning pin 1107 are all corrosion-resistant materials, such as stainless steel, which can increase the service life of the length adjustment component and avoid damage to the length adjustment component during operation.

[0027] Exemplarily, the number of the positioning hole on the connecting rod 1104 may be one.

[0028] By making the positioning hole on the connecting rod 1104 overlap with the different first connecting holes 1103 on the fixed sleeve 1102, the length of the connecting rod 1104 extending out of the fixed sleeve 1102 can be adjusted. Then, the positioning pin 1107 is passed through the first connecting hole 1103 and the positioning hole to fix the connecting rod 1104 in the fixed sleeve 1102, and the total length of the fixed sleeve 1102 and the connecting rod 1104 can be adjusted. Therefore, the feedback device can be applied to disc valves of various sizes (calibers), thereby improving the versatility of the feedback device.

[0029] Furthermore, when adjusting the total length of the fixed sleeve 1102 and the connecting rod 1104 , the length of the connecting rod 1104 extending out of the fixed sleeve 1102 can be manually adjusted after loosening the positioning pin 1107 , thereby reducing the difficulty of operation when adjusting the total length of the fixed sleeve 1102 and the connecting rod 1104 .

[0030] One end of the connecting rod 1104 is hinged to the rotating shaft of the valve feedback device 11 , so that the pulling force of the connecting rod 1104 can be converted into the rotational force for driving the rotating shaft of the valve feedback device 11 to rotate.

[0031] Exemplarily, the connecting rod 1104 may also be a hollow tube to reduce the gravity of the connecting rod 1104, and ultimately reduce the force applied by the connecting rod 1104 to the rotating shaft of the valve feedback device 11, so that the rotating shaft of the valve feedback device 11 can rotate more flexibly.

[0032] Therefore, in the feedback device provided by the embodiment of the utility model, the length adjustment component includes a fixed sleeve 1102, a connecting rod 1104 and a positioning pin 1107. By fixing the fixed sleeve 1102 on the rocker arm 2 of the disc valve, one end of the connecting rod 1104 is hinged with the rotating shaft of the valve feedback device 11. When the rocker arm 2 of the disc valve rotates, the connecting rod 1104 and the fixed sleeve 1102 can be driven to move, thereby driving the rotating shaft of the valve feedback device 11 to rotate. After that, the rotation of the rocker arm 2 of the disc valve can be obtained according to the rotation of the rotating shaft of the valve feedback device 11, thereby obtaining the opening and closing state of the disc valve. By making the connecting rod 1104 slidably arranged in the fixed sleeve 1102, the length of the connecting rod 1104 extending out of the fixed sleeve 1102 can be adjusted, so that the total length of the fixed sleeve 1102 and the connecting rod 1104 can be flexibly adjusted, so that the feedback device can be applied to disc valves of various sizes (calibers), thereby improving the versatility of the feedback device.

[0033] In some embodiments, Figure 2 As shown, the connecting rod 1104 is hinged to the rotating shaft of the valve feedback device 11 through a hinge 1106 .

[0034] Exemplarily, the connecting rod 1104 is fixedly connected to one end of the hinge 1106 via a fixing screw 1105. The other end of the hinge 1106 is fixedly connected to the rotating shaft of the valve feedback device.

[0035] In this way, the hinge 1106 in the feedback device can be detachably connected, which is convenient for replacement when the hinge 1106 is damaged.

[0036] In the prior art, the first connecting rod is welded to the rotating shaft of the valve feedback device, and the second connecting rod is welded to the rocker arm 2. Since the rotating shaft of the rocker arm 2 and the valve feedback device may be located at different heights, when the rocker arm 2 rotates, a biasing force perpendicular to the rotating plane of the rocker arm 2 may be applied to the second connecting rod and the first connecting rod. After the disc valve is used for a long time, this biasing force may cause deformation at the connection between the second connecting rod and the first connecting rod, and break the connection between the first connecting rod and the rotating shaft of the valve feedback device, and increase the resistance when the rotating shaft of the valve feedback device rotates, thereby affecting the normal operation of the valve feedback device.

[0037] Therefore, in some embodiments of the present invention, the hinge 1106 is a ball joint.

[0038] One end of the ball joint can rotate freely in multiple directions relative to the other end, and has high flexibility.

[0039] Through the above-mentioned arrangement, the hinge 1106 can adapt to various working positions and angles between the connecting rod 1104 and the rotating shaft of the valve feedback device, which can reduce or eliminate the bias force between the rocker arm 2 and the rotating shaft of the valve feedback device, avoid the influence of the bias force on the normal operation of the valve feedback device, and improve the stability of the feedback device.

[0040] In the prior art, the first connecting rod is fixed to the rotating shaft of the valve feedback device by welding, and the welding point is easily broken due to desoldering, thereby causing the valve feedback device to malfunction.

[0041] In the embodiment of the utility model, Figure 2 As shown, the feedback device further includes a fixed block 5 and a stopper 502. The fixed block 5 is fixedly connected to the second end of the hinge 1106, and a fixed groove 501 is provided on the fixed block 5. The fixed block 5 is sleeved on the rotating shaft of the valve feedback device 11 through the fixed groove 501. The stopper 502 passes through the fixed block 5 and abuts against the rotating shaft of the valve feedback device 11 to fix the fixed block 5 on the rotating shaft of the valve feedback device 11.

[0042] Exemplarily, the fixing block 5 and the second end of the hinge 1106 may be fixedly connected via threads.

[0043] Exemplarily, the limiting member 502 may be a limiting screw, and the fixing block 5 is provided with a threaded hole adapted to the limiting screw.

[0044] Through the above-mentioned arrangement, a detachable connection is achieved between the fixed block 5 and the rotating shaft of the valve feedback device 11, which facilitates the fixation between the fixed block 5 and the rotating shaft of the valve feedback device 11, and can avoid the risk of breakage caused by easy desoldering of the welding joints in the prior art, thereby improving the working stability of the feedback device.

[0045] In some embodiments, Figure 2As shown, the feedback device further includes a fixed column 1101; a first end of the fixed column 1101 is fixed to a fixed sleeve 1102, and a second end of the fixed column 1101 is fixed to a rocker arm 2 of the disc valve.

[0046] The fixed column 1101 is perpendicular to the rotation plane of the rocker arm 2 of the disc valve. The height of the fixed sleeve 1102 can be adjusted by adjusting the length of the fixed column 1101, so that the fixed sleeve 1102 and the connecting rod 1104 can be kept in the same horizontal plane as much as possible. When the rocker arm 2 of the disc valve drives the fixed sleeve 1102 and the connecting rod 1104 to move, the force applied to the rotating shaft of the valve feedback device 11 by the fixed sleeve 1102 and the connecting rod 1104 is kept in the same horizontal plane, avoiding the generation of bias force on the rotating shaft of the valve feedback device 11 and affecting the normal rotation of the rotating shaft of the valve feedback device 11.

[0047] In some embodiments, Figure 2 As shown, there are multiple positioning holes on the connecting rod 1104, and the multiple positioning holes are arranged in sequence along the extension direction of the connecting rod 1104.

[0048] Exemplarily, a plurality of positioning holes are distributed on the entire connecting rod 1104 .

[0049] Understandable, such as Figure 2 As shown, when the connecting rod 1104 needs to extend out of the fixed sleeve 1102 to the maximum length, the positioning pin 1107 can be passed through the first connecting hole 1103 on the leftmost side of the fixed sleeve 1102 and the positioning hole on the rightmost side of the connecting rod 1104. When the connecting rod 1104 needs to extend out of the fixed sleeve 1102 to the minimum length, the positioning pin 1107 can be passed through the first connecting hole 1103 on the leftmost side of the fixed sleeve 1102 and the positioning hole on the leftmost side of the connecting rod 1104.

[0050] Through the above arrangement, the adjustment range of the length of the connecting rod 1104 extending out of the fixing sleeve 1102 can be increased.

[0051] In some embodiments, the first distance L1 between the centers of any two adjacent first connection holes 1103 is the same, and the second distance L2 between the centers of any two adjacent positioning holes is the same.

[0052] Through the above arrangement, it is convenient to sequentially make a plurality of first connection holes 1103 on the fixed sleeve 1102 , and it is convenient to sequentially make a plurality of positioning holes on the connecting rod 1104 .

[0053] In some examples, the first distance L1 is equal to the second distance L2.

[0054] This helps to reduce the difficulty of designing and processing the fixed sleeve 1102 and the connecting rod 1104. After the connecting rod 1104 is inserted into the fixed sleeve 1102, there may be multiple groups of first connecting holes 1103 and positioning holes that overlap each other. At this time, the multiple groups of first connecting holes 1103 and positioning holes can be fixed by multiple positioning pins 1107, which can improve the fixing strength between the connecting rod 1104 and the fixed sleeve 1102.

[0055] In some other examples, the first distance L1 is not equal to the second distance L2.

[0056] In this case, when it is necessary to fix the connecting rod 1104 on the fixed sleeve 1102, it is only necessary to make a slight adjustment to the positions of the connecting rod 1104 and the fixed sleeve 1102, so that the first connecting hole 1103 and the positioning hole overlap each other up and down, so that the first connecting hole 1103 and the positioning hole can be fixed by the positioning pin 1107, thereby improving the adjustment accuracy of the total length of the connecting rod 1104 and the fixed sleeve 1102.

[0057] In some embodiments, the first spacing L1 satisfies: 10 mm ≤ L1 ≤ 30 mm; the second spacing L2 satisfies: 10 mm ≤ L2 ≤ 30 mm

[0058] For example, the first distance L1 may be 10 mm, 20 mm or 30 mm, and the second distance L2 may be 10 mm, 20 mm or 30 mm.

[0059] When the value of the first spacing L1 is large, the number of first connecting holes 1103 that need to be opened on the fixed sleeve 1102 can be reduced, thereby facilitating the processing of the fixed sleeve 1102; when the value of the first spacing L1 is small, the minimum length of the connecting rod 1104 extending out of the fixed sleeve 1102 can be reduced, thereby improving the adjustment accuracy of the total length of the fixed sleeve 1102 and the connecting rod 1104.

[0060] Similarly, when the value of the second spacing L2 is large, it is convenient to process the connecting rod 1104; when the value of the second spacing L2 is small, the adjustment accuracy of the total length of the fixed sleeve 1102 and the connecting rod 1104 can be improved.

[0061] Through the above arrangement, by selecting the appropriate first spacing L1 and second spacing L2, the fixing sleeve 1102 and the connecting rod 1104 can be easily processed while improving the adjustment accuracy of the total length of the fixing sleeve 1102 and the connecting rod 1104.

[0062] Embodiment 2:

[0063] like Figure 1As shown, the embodiment of the utility model further provides a disc valve assembly, which includes a disc valve and the feedback device in embodiment 1. The disc valve includes a valve body 4, a valve disc 3, a rocker arm 2 and a valve actuator 1. The fixed sleeve 1102 of the feedback device is fixed on the rocker arm 2 of the disc valve, and the valve feedback device 11 of the feedback device is fixed on the valve body 4 of the disc valve.

[0064] Exemplarily, one end of the rocker arm 2 away from the valve disc 3 is movably connected to the output end of the valve actuator 1 through a pin structure, and one end of the valve actuator 1 away from the rocker arm 2 is movably connected to the support seat 10 through a pin structure.

[0065] For example, the valve actuator 1 is driven by compressed gas. When the valve actuator 1 is working, the cylinder shaft inside the valve actuator 1 moves, and the cylinder shaft drives the rocker arm 2 to move along the motion trajectory of the cylinder shaft (the motion trajectory is Figure 1 It is understandable that the cylinder shaft can also drive the rocker arm 2 to move in the opposite direction.

[0066] Through the above arrangement, the rocker arm 2 of the disc valve can drive the valve feedback device 11 to operate when it moves. After the valve feedback device 11 operates, it can output a corresponding detection signal, thereby detecting the opening and closing state of the disc valve according to the detection signal of the valve feedback device 11.

[0067] Embodiment 3:

[0068] The present utility model also provides a disk valve monitoring system, which includes the disk valve assembly, controller and display in Example 2. The controller is electrically connected to the valve feedback device 11 of the feedback device, and is used to receive the detection signal of the valve feedback device 11 including the open and closed state of the disk valve, convert it into a display signal including the open and closed state of the disk valve, and output it to the display. The display is used to display after receiving the display signal.

[0069] Exemplarily, the controller may be a general-purpose microprocessor, which can process the data after receiving it and output the processing result.

[0070] Exemplarily, when the rocker arm 2 of the disk valve rotates to open the disk valve, the valve feedback device 11 in the feedback device outputs a first detection signal, the controller outputs a first display signal after receiving the first detection signal, and the display displays a first display screen corresponding to the opening of the disk valve after receiving the first display signal. When the rocker arm 2 of the disk valve rotates to close the disk valve, the valve feedback device 11 in the feedback device outputs a second detection signal, the controller outputs a second display signal after receiving the second detection signal, and the display displays a second display screen corresponding to the closing of the disk valve after receiving the second display signal.

[0071] Through the above arrangement, the opening and closing state of the disc valve can be displayed through the display, so that the operator can monitor the opening and closing state of the disc valve through the display.

[0072] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A feedback device for a disc valve, characterized in that: include: A valve feedback device (11) is fixed on the valve body (4) of the disc valve; A length adjustment component comprises a fixed sleeve (1102), a connecting rod (1104) and a positioning pin (1107); the fixed sleeve (1102) is fixed to the rocker arm (2) of the disc valve, a plurality of first connecting holes (1103) are arranged on the outer wall of the fixed sleeve (1102), and the plurality of first connecting holes (1103) are arranged in sequence along the extension direction of the fixed sleeve (1102); one end of the connecting rod (1104) is connected to the end of the valve feedback device (11); The rotating shaft is hinged, and the other end is slidably arranged in the fixed sleeve (1102), so that the length of the connecting rod (1104) extending out of the fixed sleeve (1102) is adjustable, and a positioning hole is arranged on the outer wall of the connecting rod (1104); the positioning pin (1107) passes through one of the first connecting holes (1103) and then extends into the positioning hole of the connecting rod (1104) to fix the connecting rod (1104) in the fixed sleeve (1102).

2. The feedback device according to claim 1, characterized in that: The connecting rod (1104) is hinged to the rotating shaft of the valve feedback device (11) through a hinge (1106).

3. The feedback device according to claim 2, characterized in that: The hinge (1106) is a ball joint.

4. The feedback device according to claim 2, characterized in that: It also includes a fixing block (5) and a limiting member (502); The fixing block (5) is fixedly connected to the second end of the hinge (1106), a fixing groove (501) is provided on the fixing block (5), and the fixing block (5) is sleeved on the rotating shaft of the valve feedback device (11) through the fixing groove (501); The limiting member (502) passes through the fixing block (5) and abuts against the rotating shaft of the valve feedback device (11) so as to fix the fixing block (5) on the rotating shaft of the valve feedback device (11).

5. The feedback device according to claim 1, characterized in that: Also includes a fixed column (1101); The first end of the fixed column (1101) is fixed on the fixed sleeve (1102), and the second end of the fixed column (1101) is fixed on the rocker arm (2) of the disc valve.

6. The feedback device according to claim 1, characterized in that: There are a plurality of positioning holes on the connecting rod (1104), and the plurality of positioning holes are arranged in sequence along the extension direction of the connecting rod (1104).

7. The feedback device according to claim 6, characterized in that: The first distance L1 between the centers of any two adjacent first connection holes (1103) is the same, and the second distance L2 between the centers of any two adjacent positioning holes is the same.

8. The feedback device according to claim 7, characterized in that: The first distance L1 satisfies: 10 mm ≤ L1 ≤ 30 mm; the second distance L2 satisfies: 10 mm ≤ L2 ≤ 30 mm.

9. A disc valve assembly, characterized in that: include: A disc valve comprising a valve body (4), a valve disc (3), a rocker arm (2) and a valve actuator (1); and, The feedback device as described in any one of claims 1 to 8, wherein the fixed sleeve (1102) of the feedback device is fixed on the rocker arm (2) of the disc valve, and the valve feedback device (11) of the feedback device is fixed on the valve body (4) of the disc valve.

10. A disc valve monitoring system, characterized in that: include: The disc valve assembly of claim 9; A controller, electrically connected to the valve feedback device (11) of the feedback device, for receiving a detection signal from the valve feedback device (11) containing the open / closed state of the disc valve, converting the signal into a display signal containing the open / closed state of the disc valve, and outputting the display signal to a display; The display is used for displaying after receiving the display signal.

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