Nuclear grade hand-operated diaphragm valve torque calibration positioning device

Abstract

This invention discloses a torque verification and positioning device for a nuclear-grade manual diaphragm valve, comprising a torque verification mechanism for verifying the opening and closing torque of the diaphragm valve and a torque limiting mechanism for limiting the opening and closing position after verification. The torque verification mechanism includes a verification component mounted on the diaphragm valve handwheel and a torque wrench for determining the torque. The torque wrench engages with the verification component, causing the verification component to rotate and determining the opening and closing torque. The torque limiting mechanism includes a torque indicating and limiting component disposed on one side of the diaphragm valve and a connecting piece fitted onto the torque indicating and limiting component. The connecting piece is screwed to the valve stem, and rotation of the valve stem causes the connecting piece to move within the range limited by the torque indicating and limiting component. By setting up the torque verification mechanism and the torque limiting mechanism, the fast-closing torque of the valve can be verified on-site, and the opening and closing position after verification can be limited, avoiding over-opening or over-closing of the valve and preventing frequent damage to the diaphragm valve caused by subsequent valve operations.

Description

Technical Field

[0001] This invention relates to the field of nuclear-grade manual diaphragm valve technology, and in particular to a torque verification and positioning device for nuclear-grade manual diaphragm valves. Background Technology

[0002] Although the manufacturer provides the valve's opening and closing torque, it does not provide a dedicated tool for the nuclear-grade manual diaphragm valve's opening and closing torque. This means that the torque provided by the manufacturer cannot be achieved during on-site equipment installation. Therefore, the originally installed manual diaphragm valves are opened and closed manually by turning the handwheel. Whether the valve is fully open or closed is generally checked by observing the horizontal line on the indicator rod. However, this method is not suitable for the field because the indicator rod is inconvenient to observe and there are deviations caused by the threads. Because nuclear-grade manual diaphragm valves are operated manually, problems can arise on-site such as diaphragm damage due to excessive closing force, valve stem damage due to excessive torque leading to internal leakage, and diaphragm detachment due to excessive opening force leading to pipeline blockage. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a nuclear-grade manual diaphragm valve torque verification and positioning device to address the deficiencies of the prior art. This device allows for on-site verification of the valve's fast-closing torque and limits the opening and closing position after verification, preventing the valve from being over-opened or over-closed and avoiding frequent damage to the diaphragm valve caused by subsequent valve operations.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a nuclear-grade manual diaphragm valve torque verification and positioning device, including a torque verification mechanism for verifying the diaphragm valve switching torque and a torque limiting mechanism for limiting the switching position after verification;

[0005] The torque verification mechanism includes a verification component for mounting on the handwheel of the diaphragm valve and a torque wrench for determining the torque. The torque wrench engages with the verification component, drives the verification component to rotate, and determines the switching torque.

[0006] The torque limiting mechanism includes a torque indicating and limiting component provided on one side of the diaphragm valve, and a connecting piece that is fitted onto the torque indicating and limiting component and screwed onto the valve stem. The rotation of the valve stem causes the connecting piece to move within the range limited by the torque indicating and limiting component.

[0007] Furthermore, the calibration component preferably includes a calibration disc, which is detachably connected to at least one connector that engages with a handwheel, and the calibration disc engages with a torque wrench.

[0008] Furthermore, preferably, the calibration disc is provided with a snap-fit ​​nut at its center, and the torque wrench engages with the snap-fit ​​nut to drive the calibration disc to rotate.

[0009] Furthermore, preferably, the calibration disk has at least one insertion hole on its surface, the insertion connector is inserted into the insertion hole, and the insertion hole is connected to the insertion connector by screw, pin, interference fit, or limit insertion.

[0010] Furthermore, it is preferable that multiple connectors are arranged symmetrically on the axis, and their number is the same as or twice the number of central support rods on the handwheel.

[0011] Furthermore, it is preferable that the insertion holes are arranged in pairs, and the distance between a pair of insertion holes is slightly larger than the outer diameter of the central support rod provided on the handwheel.

[0012] Furthermore, it is preferable that the insertion holes are provided in multiple groups, with each group of insertion holes evenly arranged on the same circle, or that the insertion holes are provided in multiple groups and arranged on different circles, with the insertion holes in the same group evenly arranged on the same circle.

[0013] Furthermore, the torque indication and limiting assembly preferably includes an indicator rod fixed to one side of the diaphragm valve, an opening limiting member and a closing limiting member detachably fixed to the indicator rod, and the distance between the opening limiting member and the closing limiting member is the diaphragm valve opening and closing torque range.

[0014] Furthermore, preferably, the opening limiter and the closing limiter are screwed, snapped, or plugged into the indicator rod, respectively.

[0015] Furthermore, preferably, one end of the connector is screwed onto the valve stem, and the other end is fitted onto the indicator rod between the opening limit member and the closing limit member.

[0016] The beneficial effects of this invention are as follows: This invention provides a nuclear-grade manual diaphragm valve torque verification and positioning device, which includes a torque verification mechanism for verifying the opening and closing torque of the diaphragm valve and a torque limiting mechanism for limiting the opening and closing position after verification. By setting the torque verification mechanism and the torque limiting mechanism, the fast closing torque of the manual diaphragm valve can be verified on-site, and the opening and closing position after verification can be limited, thus avoiding the valve from being over-opened or over-closed, and also avoiding frequent damage to the diaphragm valve caused by subsequent valve operation. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the torque verification and positioning device in an embodiment of the present invention;

[0019] Figure 2 This is a top view of the verification disk in an embodiment of the present invention;

[0020] Figure 3 This is a cross-sectional view of the verification disk in an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the connector structure in an embodiment of the present invention. Detailed Implementation

[0022] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0023] A component is referred to as being "fixed to" or "set on" another component, and it may be located directly or indirectly on that other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to that other component.

[0024] The terms “up,” “down,” “left,” “right,” “front,” “back,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer” indicate directions or positions based on those shown in the accompanying drawings.

[0025] The terms "axial" and "radial" refer to the length of the entire device or component as "axial" and the direction perpendicular to the axial direction as "radial".

[0026] The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or specifying the number of technical features. "Multiple" means two or more, unless otherwise explicitly defined.

[0027] The terms used above are for ease of description only and should not be construed as limitations on this technical solution.

[0028] like Figure 1 As shown, a nuclear-grade manual diaphragm valve torque verification and positioning device includes a torque verification mechanism 1 for verifying the diaphragm valve switching torque and a torque limiting mechanism 2 for limiting the switching position after verification. The torque verification mechanism 1 includes a verification component 11 installed on the diaphragm valve handwheel 20 and a torque wrench 12 for determining the torque. The torque wrench 12 engages with the verification component 11, causing the verification component 11 to rotate and determining the switching torque. The torque wrench 12 is equipped with a scale, which can accurately set the torque value. When the set torque value is reached, a clear clicking sound is emitted, and a slight vibration can be felt on the handle. The torque limiting mechanism 2 includes a torque indicating and limiting component 21 provided on one side of the diaphragm valve and a connecting piece 22 fitted on the torque indicating and limiting component 21. The connecting piece 22 is screwed to the valve stem 10. The rotation of the valve stem 10 causes the connecting piece 22 to move within the range limited by the torque indicating and limiting component 21.

[0029] like Figures 1-4As shown, the present invention includes two parts: a torque verification mechanism 1 and a torque limiting mechanism 2. The torque verification mechanism 1 is used to determine the opening torque and closing torque of the diaphragm valve. After the two torques are determined, they are used as standards to adjust the upper and lower limits of the torque limiting mechanism 2.

[0030] In the torque verification mechanism 1, the verification component 11 includes a verification disk 111. The shape of the verification disk 111 is not limited and can be any shape of disk structure, as long as it can fit above the handwheel 20. A symmetrical structure is preferred. For example, square, round, or triangular shapes are preferred, with a round disk being the most preferred. Since the calibration is a one-time process, the calibration disc 111 and the handwheel 20 need to be detachably connected. There are various detachable connection methods, such as snap-fit ​​and screw-fit, with snap-fit ​​being preferred. Specifically, the calibration disc 111 is detachably connected to at least one connector 114 that snaps into the handwheel 20. The connector 114 is detachably connected to the calibration disc 111. One or more connectors 114 can be provided, and the number is not specifically limited. The calibration disc 111 is fixed to the handwheel 20 by snap-fitting the connector 114. The snap-fit ​​can be directly snapped into the handwheel 20 or onto the central support rod 201 of the handwheel 20. Since the central support rod 201 is generally radially arranged and forms an angle with the rotation direction of the handwheel 20, it is preferred to snap-fit ​​onto the central support rod 201 of the handwheel 20. The snap-fit ​​can press against the central support rod 201 of the handwheel 20. The snap-fit ​​gap between the two can be relatively small, as long as the connector 114 does not slip when the handwheel 20 is rotated. If it is snapped onto the handwheel 20, the two must fit tightly to prevent the handwheel 20 from rotating and the handwheel 20 from sliding relative to the connector 114.

[0031] The snap-fit ​​mechanism between the connector 114 and the central support rod 201 of the handwheel 20 is as follows: the connector 114 is snapped onto the left or right side of the central support rod 201 of the handwheel 20, so that the connector 114 presses against the central support rod 201 of the handwheel 20, causing the handwheel 20 to rotate clockwise or counterclockwise.

[0032] The calibration disc 111 has a locking nut 112 at its center, which engages with the torque wrench 12. The locking nut 112 can be a triangular nut, a square nut, or a hexagonal nut to form a locking position for the torque wrench 12 and prevent the two from sliding against each other. The locking nut 112 is located on the front of the calibration disc 111, and the connector 114 is inserted into the back of the calibration disc 111.

[0033] like Figure 3As shown, the calibration disk 111 has at least one insertion hole 113 on its surface. One or more insertion connectors 114 can be provided, with no specific limit on the number. The insertion connector 114 is inserted into the insertion hole 113, and the insertion hole 113 and insertion connector 114 are screwed together. That is, the inner wall of the insertion hole 113 is threaded, and the insertion end of the insertion connector 114 is also threaded, and the two are threadedly connected and fixed. Alternatively, a pin connection can be used, where the side of the insertion connector 114 that passes through the insertion hole 113 has a hole through which a metal rod can be passed for fixation. An interference fit connection can also be used, where the diameter of the insertion end of the insertion connector 114 is slightly larger than the diameter of the insertion hole 113. Pressure is applied to insert the insertion connector 114 into the insertion hole 113, at which point the insertion hole 113 expands and deforms to fit over the insertion connector 114. When the insertion hole 113 returns to its original position, a clamping force is generated on the insertion connector 114, connecting the two.

[0034] Multiple connectors 114 are symmetrically arranged around the valve stem 10, and their number is the same as or twice the number of central support rods 201 on the handwheel 20. The handwheel 20 may have multiple central support rods 201, and the number of connectors 114 may be the same as the number of central support rods 201. Each connector 114 engages with a corresponding central support rod 201 on the handwheel 20, meaning that connectors 114 and central support rods 201 are connected in a one-to-one correspondence, thereby achieving the engagement of the calibration disc 111 with the handwheel 20. Alternatively, the number of connectors 114 may be twice the number of central support rods 201, with connectors 114 arranged in pairs. Each pair of connectors 114 is located on both sides of a corresponding central support rod 201, and each pair of connectors 114 precisely engages the corresponding central support rod 201, meaning that one central support rod 201 corresponds to two connectors 114 connected and fixed, thereby achieving the engagement of the calibration disc 111 with the handwheel 20.

[0035] The insertion holes 113 are arranged in pairs, and the distance between a pair of insertion holes 113 is slightly larger than the outer diameter of the central support rod 201 set on the handwheel 20. Each pair of insertion holes 113 is connected to a connector 114, so that the distance between each pair of connectors 114 is slightly larger than the outer diameter of the central support rod 201 set on the wheel, so that each pair of connectors 114 can just lock the corresponding central support rod 201, thereby realizing the engagement between the calibration plate 111 and the handwheel 20.

[0036] Multiple sets of insertion holes 113 are provided, with each set of insertion holes 113 evenly arranged on the same circle centered on the valve stem 10. The number of insertion holes 113 in each set can be the same as or twice the number of central support rods 201 on the handwheel 20. The position of each set of insertion connectors 114 corresponds to the position of the central support rod 201, allowing the insertion connectors 114 to be inserted into the central support rod 201; or, as... Figure 3As shown, multiple sets of insertion holes 113 are arranged on different circles. Insertion holes 113 in the same group are evenly arranged on the same circle, so that the plug 114 can be selectively inserted into a certain set of insertion holes 113 on a certain circle, or all insertion holes 113 can be filled. This allows the spacing between plugs 114 to be adjusted, either smaller or larger. The plug 114 is snapped onto the handwheel 20. The handwheels of diaphragm valves are of different sizes, and the insertion position of the plug 114 can be adjusted according to the size of the handwheel 20. That is, when the handwheel 20 is larger, the plug 114 can be inserted into the insertion hole on the outer circle, and when the handwheel 20 is smaller, the plug 114 can be inserted into the insertion hole on the inner circle. This allows it to be applied to handwheels 20 of various specifications of diaphragm valves as needed.

[0037] The torque indication and limit assembly 21 includes an indicator rod 211 fixed on one side of the diaphragm valve, an opening limit member 212 and a closing limit member 213 detachably fixed on the indicator rod 211, and a connector 22 with one end screwed onto the valve stem 10 and the other end fitted onto the indicator rod 211 between the opening limit member 212 and the closing limit member 213. The positions of the opening limit component 212 and the closing limit component 213 are determined by the torque verification structure 2. The torque wrench 12 in the torque verification mechanism 2 is engaged with the locking nut 112 of the verification disc 111. The torque wrench 12 rotates counterclockwise, causing the verification disc to rotate counterclockwise. The connector 114 on the verification disc 111 is connected to the central support rod 201 on the handwheel 20. The counterclockwise rotation of the verification disc 111 causes the handwheel 20 to rotate counterclockwise. The handwheel 20 on the diaphragm valve is connected to the valve stem 10. The counterclockwise rotation of the handwheel 20 causes the valve stem 10 to rotate counterclockwise, and the counterclockwise rotation of the valve stem 10 causes the sleeve... The connector 22 attached to the valve stem 10 moves on the indicator rod 211. The torque wrench 12 is equipped with a scale that allows for precise setting of the opening torque value. When the set opening value is reached, a clear click can be heard, and a slight vibration can be felt on the handle of the torque wrench 12. This is the opening torque of the diaphragm valve, meaning that the position indicated by the connector 22 on the corresponding torque indicator limit assembly 2121 on the indicator rod 211 is the opening limit assembly 212. Similarly, rotating the torque wrench 1212 clockwise causes the calibration disc 111 to rotate clockwise, and the connector 114 on the calibration disc 111 is connected to the central support rod 2 on the handwheel 20. The diaphragm valve is connected to the valve stem 10. Clockwise rotation of the calibration disc 111 drives clockwise rotation of the handwheel 20. The handwheel 20 is connected to the valve stem 10, and its clockwise rotation drives the valve stem 10. This clockwise rotation of the valve stem 10 causes the connecting piece 22, which is sleeved on the valve stem 10, to move on the indicator rod 211. The torque wrench 12 has a scale that allows for precise setting of the closing torque value. When the set closing value is reached, a clear click can be heard, and a slight vibration can be felt on the handle of the torque wrench 12. This indicates the closing torque of the diaphragm valve, i.e., when the connecting piece 22 is at the position indicated on the indicator rod 211. The distance between the opening limit member 212 and the closing limit member 213 is the limited range on the torque indicator limit assembly 2121. The opening limit member 212 and the closing limit member 213 can be selected from various structures. One is a locking nut, in which the opening limit member 212 and the closing limit member 213 are screwed onto the indicator rod 211, so that the opening limit member 212 and the closing limit member 213 can be fixed to the switching torque on the indicator rod 211. Alternatively, two holes are opened on the indicator rod 211, and the opening limit member 212 and the closing limit member 213 are respectively inserted into the two holes to achieve connection and fixation with the indicator rod 211.Alternatively, two grooves can be provided on the side end of the indicator rod 211, with the opening limit member 212 and the closing limit member 213 both being block structures, respectively engaging in the two grooves; or, for example, a sliding groove can be provided on the indicator rod 211, with the opening limit member 212 and the closing limit member 213 slidingly engaged in the groove or sliding directly along the indicator rod 211, and positioning pins provided on the opening limit member 212 and the closing limit member 213, to ensure that the opening limit member 212 and the closing limit member 213 are in position. After the closed limiter 213 is in position, tighten the positioning pins to fix them to the indicator rod 211; or the opening limiter 212 and closing limiter 213 are clamp-type structures, and after determining the positions of the opening limiter 212 and closing limiter 213, clamp the opening limiter 212 and closing limiter 213 to the indicator rod 211; the specific connection method between the opening limiter 212 and closing limiter 213 and the indicator rod 211 is not limited; the valve stem 10 rotates to drive the connecting piece 22 to move up and down, using The position of the diaphragm valve is determined by observing the position of the connector 22 on the indicator rod 211. When the diaphragm valve needs to be opened, the handwheel is turned counterclockwise, causing the valve stem 10 to rotate counterclockwise. The valve stem 10 then rotates the connector 22 counterclockwise, moving the connector 22 upwards on the indicator rod 211. When the connector 22 contacts the opening limit piece 212 on the indicator rod 211, the valve is open. When the diaphragm valve needs to be closed, the handwheel is turned clockwise, causing the valve stem 10 to rotate clockwise. The valve stem 10 then rotates the connector 22 clockwise, moving the connector downwards on the indicator rod. When the connector contacts the closing limit piece 213 on the indicator rod 211, the valve is closed. This prevents the diaphragm valve from being over-opened or over-closed due to a lack of understanding of its torque, and also avoids frequent damage to the diaphragm valve caused by subsequent valve operations.

[0038] Implementation Process: In the nuclear power plant field, a torque wrench 12 is engaged with the calibration component 11. Turning the torque wrench 12 counterclockwise causes the calibration component 11 to engage with the handwheel 20 of the diaphragm valve. The counterclockwise rotation of the torque wrench 12 drives the calibration component 11 to rotate counterclockwise, which in turn drives the handwheel 20 of the diaphragm valve to rotate counterclockwise. The handwheel 20 is connected to the valve stem 10, and its counterclockwise rotation also drives the valve stem 10 to rotate counterclockwise. The torque wrench 12 is equipped with a scale that allows for precise setting of the opening torque value. Upon reaching the set opening torque value, a clear clicking sound is heard. Furthermore, the torque wrench 12 handle can be... A slight vibration is felt, indicating the opening torque of the diaphragm valve. A limit is set at this indicated position, specifically by installing an open-state limit component on the torque indicator limit component 21 of the corresponding torque limit mechanism 2. Similarly, rotating the torque wrench 1212 clockwise causes the calibration component 11 to rotate clockwise, which in turn causes the handwheel 20 of the diaphragm valve to rotate clockwise, which in turn causes the valve stem 10 to rotate clockwise. The torque wrench 12 is equipped with a scale, allowing for precise setting of the closing torque value. Upon reaching the set closing value, a clear click sound is heard, and a slight vibration can be felt on the handle of the torque wrench 12. Vibration occurs when the diaphragm valve experiences its closing torque. The indicated position is limited by a limiting component on the torque indicating limiting component 21 of the corresponding torque limiting mechanism 2, indicating the closed state. The distance between the limiting component in the open state and the limiting component in the closed state is the limited range on the torque indicating limiting component 21. The connecting piece 22 is fitted inside the torque indicating limiting component 21, meaning it can move on the torque indicating limiting component 21. Rotating the valve stem 10 of the diaphragm valve causes the connecting piece 22 to move within the limited range of the torque indicating limiting component 21. The torque indicating limiting component 21 has a limiting component in the open state and a limiting component in the closed state. The limit components are set according to the positions indicated by the connecting piece on the torque indicator limit component 21 when the diaphragm valve is in the open and closed states, respectively, according to the torque verification mechanism 2. When the connecting piece 22 contacts the limit component in the open state, it indicates that the diaphragm valve is in the open state. When the connecting piece 22 contacts the limit component in the closed state, it indicates that the diaphragm valve is in the closed state. The valve stem 10 is rotated as needed to make the torque indicator limit component 21 in the open or closed state. Even if the diaphragm valve is in the open or closed state, it avoids the valve from being over-opened or over-closed, and also avoids the occurrence of frequent diaphragm valve damage caused by subsequent valve operation.

Claims

1. A nuclear-grade manual diaphragm valve torque verification and positioning device, characterized in that, It includes a torque verification mechanism (1) for verifying the switching torque of the diaphragm valve and a torque limiting mechanism (2) for limiting the switching position after verification; The torque verification mechanism (1) includes a verification component (11) for mounting on the diaphragm valve handwheel (20) and a torque wrench (12) for determining the torque. The torque wrench (12) engages with the verification component (11), drives the verification component (11) to rotate, and determines the switching torque. The torque limiting mechanism (2) includes a torque indicating limiting component (21) provided on one side of the diaphragm valve, and a connecting piece (22) that is fitted on the torque indicating limiting component (21) and screwed to the valve stem (10). The valve stem (10) rotates to drive the connecting piece (22) to move within the range limited by the torque limiting component. The torque indicator limiting assembly (21) includes an indicator rod (211) fixed on one side of the diaphragm valve, an opening limiting member (212) and a closing limiting member (213) detachably fixed on the indicator rod (211), and the distance between the opening limiting member (212) and the closing limiting member (213) is the diaphragm valve opening and closing torque range. The opening limiting member (212) and the closing limiting member (213) are screwed onto the indicator rod (211), so that the opening limiting member (212) and the closing limiting member (213) can be fixed to the switching torque on the indicator rod (211); or two holes are opened on the indicator rod (211), and the opening limiting member (212) and the closing limiting member (213) are respectively inserted into the two holes to achieve connection and fixation with the indicator rod (211); or two grooves are provided on the side end of the indicator rod (211), and the opening limiting member (212) and the closing limiting member (213) are both block structures, and the opening limiting member (212) and the closing limiting member (213) are respectively snapped into the two grooves; or, the A groove is provided on the indicator rod (211). The opening limiter (212) and the closing limiter (213) are slidably engaged in the groove or slide directly along the indicator rod (211). The opening limiter (212) and the closing limiter (213) are provided with positioning pins. After determining the position of the opening limiter (212) and the closing limiter (213), the positioning pins are tightened to fix them on the indicator rod (211). Alternatively, the opening limiter (212) and the closing limiter (213) are clamp-type structures. After determining the position of the opening limiter (212) and the closing limiter (213), the opening limiter (212) and the closing limiter (213) are clamped on the indicator rod (211). One end of the connector (22) is screwed onto the valve stem (10), and the other end is fitted onto the indicator rod (211) between the opening limit member (212) and the closing limit member (213).

2. The nuclear-grade manual diaphragm valve torque verification and positioning device according to claim 1, characterized in that, The verification component (11) includes a verification disc (111), which is detachably connected to at least one connector (114) that engages with a handwheel (20), and the verification disc (111) engages with a torque wrench (12).

3. The nuclear-grade manual diaphragm valve torque verification and positioning device according to claim 2, characterized in that, The calibration disk (111) is provided with a snap-fit ​​nut (112) at its center. The torque wrench (12) is snapped into the snap-fit ​​nut (112) to drive the calibration disk (111) to rotate.

4. The nuclear-grade manual diaphragm valve torque verification and positioning device according to claim 2, characterized in that, The calibration disk (111) has at least one insertion hole (113) on its surface. The insertion connector (114) is inserted into the insertion hole (113). The insertion hole (113) and the insertion connector (114) are connected by screws, pins, or interference fit.

5. The nuclear-grade manual diaphragm valve torque verification and positioning device according to claim 4, characterized in that, Multiple connectors (114) are arranged symmetrically on the axis, and their number is the same as or twice the number of central support rods (201) on the handwheel (20).

6. The nuclear-grade manual diaphragm valve torque verification and positioning device according to claim 4, characterized in that, The insertion holes (113) are arranged in pairs, and the distance between a pair of insertion holes (113) is slightly larger than the outer diameter of the central support rod (201) on the handwheel (20).

7. The nuclear-grade manual diaphragm valve torque verification and positioning device according to claim 4, characterized in that, The insertion holes (113) are arranged in multiple groups on different circles, and the insertion holes (113) in the same group are evenly arranged on the same circle.

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