Valve shaft system rotation amount measuring device and nuclear power station detection equipment

Abstract

The utility model provides a valve shaft rotation amount measuring device and nuclear power station detection equipment, the valve shaft rotation amount measuring device comprises a scale assembly, the scale assembly comprises a scale support and a scale arranged on the scale support, the scale support is used for being connected with a first part in a valve, and the scale is provided with scales; the pointer assembly comprises a pointer support and a pointer arranged on the pointer support, the pointer support is used for being connected with a second component in the valve, and the pointer is used for pointing to the scales; wherein the pointer points to one value of the scale when the second component rotates relative to the first component. By the adoption of the technical scheme, manual valve shaft overhauling operation with naked eyes is avoided, rotation of the valve shaft can be quantified, the measurement accuracy degree of valve shaft overhauling operation is improved, potential safety hazards of overhauling are reduced, the fault probability of the valve is reduced, part of problems are eliminated in the maintaining stage, and smooth operation of a unit is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power plant detection equipment, and more specifically, to a valve shaft system rotation amount measuring device and nuclear power plant detection equipment. Background Art

[0002] The regulating valve is an important component of nuclear power equipment. It is responsible for regulating valve flow and pressure and is in a constant state of regulation during operation. During the valve operation, the valve stem and pneumatic rod of some valves will rotate as a whole, causing the valve to be unusable for skipping levels and reactors.

[0003] For example:

[0004] 1. During a professional inspection of the overhaul instrument at a certain base, it was found that the magnetic strip was installed to one side and almost touched the magnetic strip slot of the positioner. If the magnetic strip was installed to one side and continued to deflect during operation, the valve would become unusable.

[0005] 2. During the temporary shutdown of a unit at a certain location, the coupling rotation was checked and the mechanical fasteners were checked, and no obvious looseness was found. However, during the subsequent inspection, the main control feedback status was abnormal, and professional on-site inspections found that the coupling had rotated a certain angle, causing the instrument control feedback rod to be offset and unable to monitor the valve position normally.

[0006] 3. During the overhaul of a nuclear power plant, the instrument professionals were debugging the valves. When operating the valves, they found that the coupling was deflected. During the overhaul of the instruments, the positioners were modified. After the modification, there was a risk of friction between the non-contact magnetic strips and the guide rails.

[0007] In summary, the shaft rotation of the valve is difficult to detect with the naked eye of maintenance personnel, and is often only discovered when a fault occurs during long-term operation. Therefore, the existing valve maintenance problems are highly hidden, resulting in great safety hazards in maintenance. Utility Model Content

[0008] The utility model aims to provide a valve shaft rotation measurement device and nuclear power plant detection equipment to solve the technical problems of high secrecy and great safety risks in valve maintenance in the prior art.

[0009] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0010] In a first aspect, a valve shaft rotation measurement device is provided, comprising:

[0011] A ruler assembly, the ruler assembly comprising a ruler bracket and a ruler arranged on the ruler bracket, the ruler bracket being used to be connected to the first component in the valve, and the ruler being provided with scales;

[0012] A pointer assembly, the pointer assembly comprising a pointer bracket and a pointer arranged on the pointer bracket, the pointer bracket is used to be connected to the second component in the valve, and the pointer is used to point to the scale;

[0013] Wherein, when the second component rotates relative to the first component, the pointer points to one of the values ​​of the scale.

[0014] By adopting the above technical solution, the maintenance work of the valve shaft by human eyes is avoided, the rotation of the valve shaft can be quantified, the measurement accuracy of the valve shaft maintenance work is improved, the safety hazards of maintenance are reduced, the probability of valve failure is reduced, some problems are eliminated during the maintenance stage, and the smooth operation of the unit is guaranteed.

[0015] In one embodiment, the pointer bracket includes a pointer fixing structure and a telescopic structure connected to the pointer fixing structure, the pointer fixing structure is used to be connected to the second component, the telescopic structure connects the pointer fixing structure and the pointer, and the telescopic structure is used to adjust the distance between the pointer and the pointer fixing structure.

[0016] By adopting the above technical solution, the pointer bracket includes a telescopic structure. On the one hand, the length of the telescopic structure is adjustable, which can ensure that the distance between the pointer and the second component is constant during multiple measurement operations, thereby ensuring that the measurement operation can be accurately repeated; on the other hand, the adjustable length of the telescopic structure can also make the pointer bracket suitable for valve stems and yokes at different distances, thereby improving the applicability of the pointer bracket.

[0017] In one embodiment, the pointer fixing structure includes a first clamping plate, a second clamping plate and a fastener for fastening the first clamping plate and the second clamping plate, a clamping groove is provided between the first clamping plate and the second clamping plate, and the fastener is used to adjust the clamping groove so that the first clamping plate and the second clamping plate jointly clamp the second component.

[0018] By adopting the above technical solution, the size of the clamping groove is adjustable, so that the pointer fixing structure can clamp valve stems of different diameters, thereby improving the applicability of the pointer fixing structure.

[0019] In one embodiment, the second clamping plate is provided with a sliding hole connected to the clamping groove, and the telescopic structure includes a first telescopic rod, the first telescopic rod is slidably arranged in the sliding hole, the first telescopic rod can move along a telescopic direction, and the telescopic direction is a direction approaching and away from the first component. The first end of the first telescopic rod is used to extend into the clamping groove, and an elastic member is provided between the first telescopic rod and the sliding hole, and the elastic member is used to drive the first end of the first telescopic rod to abut against the second component, and the second end of the first telescopic rod opposite to the first end is connected to the pointer.

[0020] By adopting the above technical solution, the first telescopic rod can adjust its extension length to suit the second components of different sizes, ensuring that the pointer can be set close to the scale each time, which helps to reduce the adjustment steps and time for maintenance personnel.

[0021] In one embodiment, the telescopic structure also includes a second telescopic rod, which is slidably connected to the first telescopic rod, and the second telescopic rod can move along the telescopic direction. The first telescopic rod is provided with a rack along the telescopic direction, and the second telescopic rod is provided with a fine-tuning nut that can rotate around an axis, and the fine-tuning nut is provided with a gear that meshes with the rack. The second telescopic rod moves relative to the rack when the gear moves relative to the first telescopic rod along the telescopic direction, and the second telescopic rod connects the first telescopic rod and the pointer.

[0022] By adopting the above technical solution, the extension length of the telescopic structure can be slightly adjusted, thereby improving the accuracy of the distance between the pointer and the second component, thereby improving the measurement accuracy.

[0023] In one embodiment, the pointer bracket is further provided with a pointer adjustment frame arranged on the second telescopic rod, the pointer adjustment frame can move along a direction perpendicular to the telescopic direction, and the pointer is arranged on the pointer adjustment frame.

[0024] By adopting the above technical solution, the adjustability and flexibility between the pointer and the ruler are further improved.

[0025] In one embodiment, the pointer is a pointer structure or a laser structure, the pointer structure is used to point to the scale of the ruler, and the laser structure is used to project laser onto the scale of the ruler.

[0026] By adopting the above technical solution, there are various forms of pointers, and maintenance personnel can replace the pointers according to needs.

[0027] In one embodiment, when the pointer is a laser structure, the pointer assembly also includes a wireless communication structure and a control structure electrically connected to the laser structure, the control structure is used to obtain measurement information of the laser structure, and the wireless communication structure is used to send the measurement information.

[0028] By adopting the above technical solution, maintenance personnel can obtain measurement information at a long distance, saving manpower and time costs and improving maintenance efficiency.

[0029] In one embodiment, the ruler bracket includes a fixed frame, a first bracket structure and a second bracket structure, the fixed frame is used to connect to the first component, the first bracket structure is connected to the fixed frame through a first universal structure, the second bracket structure is connected to the first bracket structure through an axis connection structure, and the ruler is connected to the second bracket structure through a second universal structure.

[0030] By adopting the above technical solution, the position of the ruler can be adjusted, thereby improving the flexibility of adjusting the position of the ruler.

[0031] In a second aspect, a nuclear power plant detection device is provided, comprising a mobile terminal and the above-mentioned valve shaft rotation amount measuring device, wherein the mobile terminal is communicatively connected with the valve shaft rotation amount measuring device.

[0032] By adopting the above technical solution, on the basis of having the advantages of the valve shaft rotation measurement device of the above embodiment, the nuclear power plant detection equipment of this embodiment also has great benefits in terms of economy, safety, quality, construction period and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 It is a schematic diagram of the use of the valve shaft rotation amount measuring device and the valve shaft provided in the embodiment of the utility model.

[0035] Figure 2 It is a three-dimensional structural diagram of a valve shaft rotation amount measuring device provided by an embodiment of the utility model.

[0036] Figure 3 It is a three-dimensional structural diagram from one viewing angle of the pointer assembly provided by an embodiment of the utility model.

[0037] Figure 4It is a cross-sectional view of a pointer assembly provided by an embodiment of the utility model.

[0038] Figure 5 It is a three-dimensional structural diagram of a pointer assembly provided by an embodiment of the utility model from another viewing angle.

[0039] Figure 6 It is a three-dimensional structural diagram of a valve shaft rotation measurement device provided by an embodiment of the utility model, wherein the pointer is a laser structure.

[0040] Figure 7 It is a three-dimensional structural diagram of the scale assembly provided in the embodiment of the utility model.

[0041] The reference numerals in the figures are:

[0042] 1. Ruler assembly; 2. Pointer assembly; 3. First component; 4. Second component; X, telescopic direction; Y, axis;

[0043] 11. Ruler bracket; 12. Ruler; 21. Pointer bracket; 22. Pointer; 23. Pointer adjustment bracket;

[0044] 111, fixed frame; 112, first bracket structure; 113, second bracket structure; 114, first universal structure; 115, shaft connection structure; 116, second universal structure; 121, scale; 211, pointer fixing structure; 212, telescopic structure;

[0045] 2111, first clamping plate; 2112, second clamping plate; 2113, fastener; 2114, clamping groove; 2115, sliding hole; 2121, first telescopic rod; 2122, elastic member; 2123, second telescopic rod; 2124, fine-tuning nut;

[0046] 21211, rack; 21241, gear. DETAILED DESCRIPTION

[0047] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0048] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly located on the other element or indirectly located on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element.

[0049] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention, and do not indicate that a device or element must have a specific direction, be constructed and operated in a specific direction. Therefore, it should not be understood as a limitation on the present invention.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating relative importance or indicating the number of technical features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The following is a more detailed description of the specific implementation of the present utility model in conjunction with specific embodiments:

[0051] like Figure 1 and Figure 2 As shown, a valve shaft rotation amount measuring device provided by an embodiment of the utility model is applied to the maintenance of nuclear power plants and is used to measure the rotation amount of the valve shaft system; specifically, the valve shaft rotation amount measuring device of this embodiment is respectively fixed to the first component and the second component in the valve, wherein the first component can be a yoke, and the second component can be a valve stem, and the valve stem can rotate around its own axis relative to the yoke, so that the valve shaft rotation amount measuring device obtains the value of the above relative movement, thereby analyzing the rotation amount of the valve, and the maintenance personnel obtain the maintenance status of the valve according to the rotation amount of the valve; compared with the visual inspection by the maintenance personnel, the valve shaft rotation amount measuring device of this embodiment has the advantages of high measurement accuracy and saving the labor cost of the maintenance personnel; the following is explained through specific implementation methods:

[0052] The valve shaft rotation measurement device of this embodiment includes: a scale assembly 1 and a pointer assembly 2;

[0053] The scale assembly 1 comprises a scale bracket 11 and a scale 12 arranged on the scale bracket 11. The scale bracket 11 is used to be connected to the first component 3 in the valve, and the scale 12 is provided with a scale 121.

[0054] The pointer assembly 2 includes a pointer bracket 21 and a pointer 22 arranged on the pointer bracket 21. The pointer bracket 21 is used to connect with the second component 4 in the valve, and the pointer 22 is used to point to the scale 121.

[0055] When the second component 4 rotates relative to the first component 3 , the pointer 22 points to one of the values ​​of the scale 121 .

[0056] Here, it can be understood that the scale assembly 1 refers to a component for providing a scale 12; the scale assembly 1 is used to connect with the first component 3, and in this embodiment, the scale assembly 1 is fixed to the yoke; the scale assembly 1 includes a scale bracket 11 and a scale 12; the scale bracket 11 refers to a bracket for supporting the scale 12, one end of the scale bracket 11 is used to connect with the yoke, and the other end of the scale bracket 11 is provided with the scale 12; the scale 12 is provided on the end of the scale bracket 11 away from the yoke, and the scale 12 is provided with a scale 121, and the scale 121 is used to represent the rotation amount of the valve shaft;

[0057] The pointer assembly 2 refers to a component used to point to a certain value of the scale 121, indicating the current rotation amount of the valve shaft; the pointer assembly 2 is used to be arranged on the second component 4. In this embodiment, the second component 4 refers to the valve stem, and the valve stem can rotate around its own axis; the pointer assembly 2 includes a pointer bracket 21 and a pointer 22. The pointer bracket 21 refers to a bracket used to support the pointer 22. One end of the pointer bracket 21 is used to be connected to the valve stem, and the other end of the pointer bracket 21 is provided with the pointer 22; the pointer 22 is used to point to a certain value of the scale 121, used to indicate the current rotation amount of the valve stem.

[0058] The working principle of the valve shaft rotation measurement device provided in this embodiment is as follows:

[0059] The scale assembly 1 is arranged on the first component 3. Specifically, the scale bracket 11 is fixedly arranged on the yoke. The scale bracket 11 arranges the scale 12 close to the second component 4, that is, close to the valve stem;

[0060] The pointer assembly 2 is arranged on the second component 4. Specifically, the pointer bracket 21 is fixedly arranged on the valve stem. The pointer bracket 21 arranges the pointer 22 close to the scale 12 so that the pointer 22 can point to the scale 121 on the scale 12.

[0061] In the initial state, the recording pointer 22 points to the initial position of the scale 121. After a preset time, the valve stem rotates around its own axis relative to the yoke, thereby driving the pointer bracket 21 and the pointer 22 to rotate around the axis of the valve stem. In this way, the position of the pointer 22 on the scale 121 changes. At this time, the pointer 22 is at the measuring position on the scale 121. By comparing the two positions, the rotation amount of the valve stem can be obtained.

[0062] By adopting the above technical solution, the maintenance work of the valve shaft by human eyes is avoided, the rotation of the valve shaft can be quantified, the measurement accuracy of the valve shaft maintenance work is improved, the safety hazards of maintenance are reduced, the probability of valve failure is reduced, some problems are eliminated during the maintenance stage, and the smooth operation of the unit is guaranteed.

[0063] See also Figure 3In one embodiment, the pointer bracket 21 includes a pointer fixing structure 211 and a telescopic structure 212 connected to the pointer fixing structure 211, the pointer fixing structure 211 is used to be connected to the second component 4, the telescopic structure 212 connects the pointer fixing structure 211 and the pointer 22, and the telescopic structure 212 is used to adjust the distance between the pointer 22 and the pointer fixing structure 211.

[0064] Here, it can be understood that the pointer fixing structure 211 refers to a structure for fixing the pointer bracket 21 on the second component 4; the pointer fixing structure 211 is used to connect to the second component 4; the telescopic structure 212 is connected to the pointer fixing structure 211, and the pointer 22 is arranged on the telescopic structure 212. The telescopic structure 212 can adjust the distance between the pointer 22 and the pointer fixing structure 211, that is, the telescopic structure 212 can limit the distance between the pointer 22 and the second component 4, so that the distance between the pointer 22 and the second component 4 is constant for each measurement operation, ensuring that the measurement operation can be accurately repeated; or, the telescopic structure 212 is used to adjust the distance between the pointer 22 and the pointer fixing structure 211, so that the pointer bracket 21 of this embodiment can be suitable for valve stems and yokes with different distances, thereby improving the applicability of the pointer bracket 21.

[0065] By adopting the above technical solution, the pointer bracket 21 includes a telescopic structure 212. On the one hand, the length of the telescopic structure 212 is adjustable, which can ensure that the distance between the pointer 22 and the second component 4 is constant during multiple measurement operations, thereby ensuring that the measurement operation can be accurately repeated; on the other hand, the adjustable length of the telescopic structure 212 can also make the pointer bracket 21 applicable to valve stems and yokes at different distances, thereby improving the applicability of the pointer bracket 21.

[0066] In one embodiment, the pointer fixing structure 211 includes a first clamping plate 2111, a second clamping plate 2112 and a fastener 2113 for fastening the first clamping plate 2111 and the second clamping plate 2112. A clamping groove 2114 is provided between the first clamping plate 2111 and the second clamping plate 2112. The fastener 2113 is used to adjust the clamping groove 2114 so that the first clamping plate 2111 and the second clamping plate 2112 jointly clamp the second component 4.

[0067] Here, it can be understood that the pointer fixing structure 211 is used to be fixed on the second component 4 so that the pointer 22 is fixed relative to the second component 4; the pointer fixing structure 211 includes a first clamping plate 2111, a second clamping plate 2112 and a fastener 2113, the first clamping plate 2111 and the second clamping plate 2112 are arranged opposite to each other and a clamping groove 2114 is provided therebetween, the fastener 2113 fastens the first clamping plate 2111 and the second clamping plate 2112, and the fastener 2113 can adjust the size of the clamping groove 2114 by adjusting the distance between the first clamping plate 2111 and the second clamping plate 2112, thereby fixing the second component 4 in the clamping groove 2114.

[0068] By adopting the above technical solution, the size of the clamping groove 2114 is adjustable, so that the pointer fixing structure 211 can clamp valve stems of different diameters, thereby improving the applicability of the pointer fixing structure 211.

[0069] Please also read Figures 3 to 5 In one embodiment, the second clamping plate 2112 is provided with a sliding hole 2115 connected to the clamping groove 2114, and the telescopic structure 212 includes a first telescopic rod 2121, which is slidably arranged in the sliding hole 2115. The first telescopic rod 2121 can move along the telescopic direction X, and the telescopic direction X is a direction approaching and away from the first component 3. Preferably, the telescopic direction X is perpendicular to the axis Y of the first component 3. The first end 21212 of the first telescopic rod 2121 is used to extend into the clamping groove 2114. An elastic member 2122 is provided between the first telescopic rod 2121 and the sliding hole 2115. The elastic member 2122 is used to drive the first end 21212 of the first telescopic rod 2121 to abut against the second component 4. The second end 21213 of the first telescopic rod 2121 opposite to the first end 21212 is connected to the pointer 22.

[0070] Here, it can be understood that the second clamping plate 2112 is provided with a sliding hole 2115, which is connected to the clamping groove 2114; the telescopic structure 212 includes a first telescopic rod 2121, and the first telescopic rod 2121 has a first end 21212 and a second end 21213 relative to each other. The first end 21212 is inserted into the sliding hole 2115 and extends into the clamping groove 2114. An elastic member 2122 is provided in the sliding hole 2115. The elastic member 2122 connects the first telescopic rod 2121 and is used to drive the first end 21212 of the first telescopic rod 2121 to abut against the second component 4. In this way, even if the diameter of the second component 4 changes, the first end 21212 of the first telescopic rod 2121 is always in contact with the surface of the second component 4, ensuring that the extended length of the first telescopic rod 2121 is always kept roughly the same, which is conducive to setting the pointer 22 close to the ruler 12.

[0071] By adopting the above technical solution, the first telescopic rod 2121 can adjust its extension length to suit the second components 4 of different sizes, ensuring that the measuring pointer 22 can be set close to the scale 12 each time, which helps to reduce the adjustment steps and time of maintenance personnel.

[0072] In one embodiment, the telescopic structure 212 also includes a second telescopic rod 2123, which is slidably connected to the first telescopic rod 2121. The second telescopic rod 2123 can move along the telescopic direction X. The first telescopic rod 2121 is provided with a rack 21211 along the telescopic direction X. The second telescopic rod 2123 is provided with a fine-tuning nut 2124 that can rotate around an axis. The fine-tuning nut 2124 is provided with a gear 21241 that meshes with the rack 21211. The second telescopic rod 2123 moves relative to the rack 21211 and moves relative to the first telescopic rod 2121 along the telescopic direction X. The second telescopic rod 2123 connects the first telescopic rod 2121 and the pointer 22.

[0073] Here, it can be understood that the second telescopic rod 2123 is used to fine-tune the extension length of the telescopic structure 212 to ensure that the distance between the top of the pointer 22 and the axis Y of the valve stem is a fixed value, for example, 180 mm; the second telescopic rod 2123 is slidably connected to the first telescopic rod 2121. In this embodiment, the second telescopic rod 2123 is slidably sleeved on the second end 21213 of the first telescopic rod 2121, and the first telescopic rod 2121 is provided with a rack 21211, and the rack 21211 is moved along the telescopic direction. X is arranged in sequence, a fine-tuning nut 2124 is provided on the second telescopic rod 2123, a gear 21241 is provided on the fine-tuning nut 2124, and the gear 21241 is meshed with the rack 21211; when the maintenance personnel need to fine-tune the extension length of the second telescopic rod 2123, the maintenance personnel rotate the fine-tuning nut 2124 to make the gear 21241 move on the rack 21211, thereby driving the entire second telescopic rod 2123 to move along the telescopic direction X, thereby realizing the fine-tuning of the second telescopic rod 2123.

[0074] By adopting the above technical solution, the extension length of the telescopic structure 212 can be slightly adjusted, thereby improving the accuracy of the distance between the pointer 22 and the second component 4, thereby improving the measurement accuracy.

[0075] In one embodiment, the pointer bracket 21 is further provided with a pointer adjustment frame 23 disposed on the second telescopic rod 2123 . The pointer adjustment frame 23 can move along a direction perpendicular to the telescopic direction X. The pointer 22 is disposed on the pointer adjustment frame 23 .

[0076] Here, it can be understood that the pointer adjustment frame 23 can adjust the longitudinal distance between the pointer 22 and the scale 12 .

[0077] By adopting the above technical solution, the adjustability and flexibility between the pointer 22 and the scale 12 are further improved.

[0078] Please also read Figure 6 In one embodiment, the pointer 22 is a pointer structure or a laser structure. The pointer structure is used to point to the scale 121 of the ruler 12 , and the laser structure is used to project laser onto the scale 121 of the ruler 12 .

[0079] Here, it can be understood that the pointer structure refers to a structure with a needle tip or a mark, and the pointer structure can point to the scale 121 of the ruler 12; the laser structure refers to a structure that can emit laser light, which is equivalent to the function of the pointer structure by irradiating the scale 12 with laser light. The laser structure can also have the function of acquiring, collecting and storing the value of the scale 121, so that the maintenance personnel can obtain the rotation amount of the valve stem within a certain time period.

[0080] By adopting the above technical solution, the pointer 22 has various forms, and maintenance personnel can replace the pointer 22 according to needs.

[0081] In one embodiment, when the pointer 22 is a laser structure, the pointer assembly 2 also includes a wireless communication structure and a control structure electrically connected to the laser structure, the control structure is used to obtain measurement information of the laser structure, and the wireless communication structure is used to send measurement information.

[0082] Here, it can be understood that the control structure is used to obtain measurement information, and the wireless communication structure is used to send the above measurement information to the mobile terminal, so that the maintenance personnel can obtain the measurement information from the mobile terminal.

[0083] By adopting the above technical solution, maintenance personnel can obtain measurement information at a long distance, saving manpower and time costs and improving maintenance efficiency.

[0084] like Figure 7 As shown, in one embodiment, the scale bracket 11 includes a fixing frame 111, a first bracket structure 112 and a second bracket structure 113. The fixing frame 111 is used to connect with the first component 3. The first bracket structure 112 is connected to the fixing frame 111 through a first universal structure 114. The second bracket structure 113 is connected to the first bracket structure 112 through an axis connection structure 115. The scale 12 is connected to the second bracket structure 113 through a second universal structure 116.

[0085] By adopting the above technical solution, the position of the scale 12 is made adjustable, thereby improving the flexibility of adjusting the position of the scale 12.

[0086] In a second aspect, a nuclear power plant detection device is provided, including a mobile terminal and the above-mentioned valve shaft rotation amount measuring device, and the mobile terminal is communicatively connected with the valve shaft rotation amount measuring device.

[0087] By adopting the above technical solution, on the basis of having the advantages of the valve shaft system rotation amount measuring device of the above embodiment, the nuclear power plant detection equipment of this embodiment also has the following advantages:

[0088] 1. Economic benefits: Pneumatic control valves are important automation control equipment in nuclear power plants, which control medium flow, temperature, pressure, etc. For example, ARE feed water, GCT bypass, CEX024 / 025 / 026VL, ADG003VV, SRI060VD and other equipment have experienced many shaft deflection, loose piston plate and piston rod, and air leakage at the connection between the piston plate and the pneumatic rod. Once similar situations occur in important equipment, power reduction or shutdown is required. The power generation cost affected by the maintenance of a single device is about 600W, which seriously affects the safety availability and output value of power station equipment.

[0089] 2. Safety benefits: The problem of shaft deflection in the actuator of pneumatic control valves is relatively common. Among them, GCT bypass and ADG003 / 009VV are both high-temperature valves. The use of shaft deflection measurement tools can accurately identify problems, reduce work repetitions, and reduce industrial safety risks such as noise, high temperature, and mechanical damage.

[0090] 3. Quality benefits: The shaft anti-torsion measuring device is not only compatible with all pneumatic control valves, but can also accurately measure the shaft rotation angle, making maintenance quantifiable. Problems can be detected during maintenance and operation, and the device will not affect the valve stroke and switching time.

[0091] 4. Project period benefits: For ARE water supply, GCT bypass, CEX024 / 025 / 026VL, ADG003VV, SRI060VD and other CCM and heavy-damage equipment, if the piston plate and pneumatic rod are loose, 4 people are required and the maintenance period is at least 12 hours;

[0092] 5. Social benefits: By studying the failure causes such as the deflection of the pneumatic control valve actuator, the shaft deflection measurement device is designed to help reduce the time spent on on-site maintenance by operators, reduce industrial safety risks such as noise, high temperature, mechanical damage, etc. on-site operators, and is beneficial to the physical and mental health of practitioners. The optimized process improves the reliability of the equipment and reduces the probability of installation failure. Since this type of anti-deflection design is used on important control valves, the professional deflection of the equipment will cause the control equipment to fail, which will cause large transients in the unit, and even machine and reactor jumps. The design and application have huge potential economic benefits.

[0093] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A valve shaft rotation measurement device, characterized in that: include: A ruler assembly, the ruler assembly comprising a ruler bracket and a ruler arranged on the ruler bracket, the ruler bracket being used to be connected to the first component in the valve, and the ruler being provided with scales; A pointer assembly, the pointer assembly comprising a pointer bracket and a pointer arranged on the pointer bracket, the pointer bracket is used to be connected to the second component in the valve, and the pointer is used to point to the scale; Wherein, when the second component rotates relative to the first component, the pointer points to one of the values ​​of the scale.

2. The valve shaft rotation measurement device according to claim 1, characterized in that: The pointer bracket includes a pointer fixing structure and a telescopic structure connected to the pointer fixing structure, the pointer fixing structure is used to be connected to the second component, the telescopic structure connects the pointer fixing structure and the pointer, and the telescopic structure is used to adjust the distance between the pointer and the pointer fixing structure.

3. The valve shaft rotation measurement device according to claim 2, characterized in that: The pointer fixing structure includes a first clamping plate, a second clamping plate and a fastener for fastening the first clamping plate and the second clamping plate. A clamping groove is provided between the first clamping plate and the second clamping plate. The fastener is used to adjust the clamping groove so that the first clamping plate and the second clamping plate can jointly clamp the second component.

4. The valve shaft rotation measurement device according to claim 3, characterized in that: The second clamping plate is provided with a sliding hole connected to the clamping groove, and the telescopic structure includes a first telescopic rod, which is slidably arranged in the sliding hole. The first telescopic rod can move along a telescopic direction, and the telescopic direction is a direction approaching and away from the first component. The first end of the first telescopic rod is used to extend into the clamping groove, and an elastic member is provided between the first telescopic rod and the sliding hole. The elastic member is used to drive the first end of the first telescopic rod to abut against the second component, and the second end of the first telescopic rod opposite to the first end is connected to the pointer.

5. The valve shaft rotation measurement device according to claim 4, characterized in that: The telescopic structure also includes a second telescopic rod, which is slidably connected to the first telescopic rod, and the second telescopic rod can move along the telescopic direction. The first telescopic rod is provided with a rack along the telescopic direction, and the second telescopic rod is provided with a fine-tuning nut that can rotate around an axis, and the fine-tuning nut is provided with a gear meshing with the rack. The second telescopic rod moves relative to the rack when the gear moves relative to the first telescopic rod along the telescopic direction, and the second telescopic rod connects the first telescopic rod and the pointer.

6. The valve shaft rotation measurement device according to claim 5, characterized in that: The pointer bracket is further provided with a pointer adjustment frame arranged on the second telescopic rod, the pointer adjustment frame can move along a direction perpendicular to the telescopic direction, and the pointer is arranged on the pointer adjustment frame.

7. The valve shaft rotation measurement device according to any one of claims 1 to 6, characterized in that: The pointer is a pointer structure or a laser structure. The pointer structure is used to point to the scale of the ruler, and the laser structure is used to project laser onto the scale of the ruler.

8. The valve shaft rotation measurement device according to claim 7, characterized in that: When the pointer is a laser structure, the pointer assembly further includes a wireless communication structure and a control structure electrically connected to the laser structure, the control structure is used to obtain measurement information of the laser structure, and the wireless communication structure is used to send the measurement information externally.

9. The valve shaft rotation measurement device according to any one of claims 1 to 6, characterized in that: The ruler bracket includes a fixing frame, a first bracket structure and a second bracket structure. The fixing frame is used to connect with the first component. The first bracket structure is connected to the fixing frame through a first universal structure. The second bracket structure is connected to the first bracket structure through an axis connection structure. The ruler is connected to the second bracket structure through a second universal structure.

10. A nuclear power plant detection equipment, characterized in that: It comprises a mobile terminal and the valve shaft rotation amount measuring device according to any one of claims 1 to 9, wherein the mobile terminal is communicatively connected with the valve shaft rotation amount measuring device.

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