SF6 gas density relay verification supporting device and use method thereof

Abstract

The invention provides an SF6 gas density relay verification supporting device and a using method thereof, and relates to the field of SF6 gas density relay verification, the SF6 gas density relay verification supporting device comprises a frame, a supporting block and a fixing claw, the frame comprises a frame bottom plate and a frame back plate; the fixing claw comprises a fixing piece, a gasket, a front cover, a rear cover, a nut and a gear. The whole device is made of rubber, stainless steel and plastic materials. The supporting block is placed on the frame, and the bottom of the supporting block is in contact with the frame; the fixing claws are connected with the frame back plate through the front cover, the rear cover and nuts. According to the verification supporting device, the number, the size and the installation position of the fixing claws and the position of the supporting block can be adjusted according to the specific conditions of the external dimension, the air inlet position and the wiring position of the SF6 gas density relay, so that the requirements of long-time vertical and stable placement during verification of the SF6 gas density relay are met; errors caused by manual holding, gas circuit blockage and poor contact of electric shock signals are effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of SF6 gas density relay calibration, and in particular to a SF6 gas density relay calibration support device and a use method thereof. Background Art

[0002] SF6 gas density relay is the only means installed on SF6 circuit breaker to monitor the change of SF6 gas density. The change of SF6 gas density directly affects the insulation and arc extinguishing performance of circuit breaker, and is an important guarantee for the reliable and safe operation of circuit breaker. The quality of SF6 gas density relay is directly related to whether the circuit breaker can operate reliably, so how to accurately monitor the change of SF6 gas density is particularly important, which puts higher requirements on the accurate calibration of SF6 gas density relay.

[0003] According to the provisions of DL / T 596 "Preventive Test Procedures for Power Equipment", SF6 gas density relays need to be calibrated regularly. According to the requirements of DL / T 259 "SF6 Gas Density Relay Inspection Procedures", the meter head must always be kept stably vertically placed during the inspection of SF6 gas density relays. There are mainly three situations when inspecting existing SF6 gas density relays: 1. No matching inspection bracket. When calibrating the SF6 gas density relay, one person needs to hold the meter and one person needs to operate the equipment. The hand-held part happens to be the temperature sensor part of the equipment. Both the equipment and the meter have temperature compensation functions. Long-term contact with the temperature sensing parts of the equipment is likely to cause temperature changes, resulting in calibration errors. Moreover, the hand-held meter cannot effectively fix the meter, which is not convenient for accurate reading of values ​​and calibration of contacts, which will increase the time and workload of the calibration. In addition, the long-term hand-held meter may cause poor contact of the low pressure alarm and low pressure lockout signals due to the jitter of the test personnel, resulting in errors. 2. The calibration bracket is not stable, and the gas path is blocked during the calibration process, and the overall dumping occurs. 3. With the widespread application of SF6 circuit breakers, the appearance size, air inlet position and wiring port position of SF6 gas density relay are not fixed, but are customized according to actual conditions (for example: bottom air inlet port, right air inlet port, rear air inlet port and rear wiring port installation methods). This requires the SF6 gas density relay calibration support device to meet the requirements of different appearance sizes and installation methods, and have more comprehensive inclusiveness and adaptability. Summary of the invention

[0004] The present invention provides a SF6 gas density relay calibration support device and a use method thereof, which are used to solve the above-mentioned problems that handheld meter detection may cause detection errors, affect detection results, and the support device is unstable and has low adaptability.

[0005] In order to solve the above technical problems, the present invention discloses a SF6 gas density relay calibration support device and a method for using the same, comprising a frame, a support block and a fixing claw, wherein the frame comprises a frame bottom plate and a frame back plate; the fixing claw comprises a fixing sheet, a gasket, a front cover, a rear cover, a nut and a gear; the entire device is made of rubber, stainless steel and plastic materials;

[0006] The frame is placed horizontally on a horizontal plane. The frame plays the role of auxiliary fixing and supporting, and is the frame of the entire device. The frame back plate is fixedly connected to the frame bottom plate. The frame back plate is in a rectangular shape and is made of stainless steel. A number of circular holes are evenly distributed on the back plate. The inner walls of the circular holes have internal threads, and the circular holes are connected to the fixing claws.

[0007] The support block is placed on the frame, and the bottom of the support block is placed in contact with the frame;

[0008] The fixing claw is connected to the frame, and the fixing claw is connected to the frame back plate through a front cover, a rear cover and a nut.

[0009] Preferably, the frame bottom plate includes a first frame bottom plate, a second frame bottom plate and a third frame bottom plate, and the first frame bottom plate, the second frame bottom plate and the third frame bottom plate are respectively connected with a frame back plate, and the frame bottom plate can be selected according to actual conditions;

[0010] The first frame bottom plate is in the shape of a cuboid, the upper layer of which is made of magnetic rubber material, and the lower layer is made of stainless steel material, and the upper layer is pasted on the lower layer for use; the magnetic rubber is a rubber with magnetic components added during the rubber processing process; the first frame bottom plate is used to place the support block and the fixed instrument to be calibrated;

[0011] The second frame bottom plate is in a rectangular shape, with an upper layer made of rough rubber material and a lower layer made of stainless steel material, and the upper layer is pasted on the lower layer for use; the rough rubber is processed into a rough shape to increase the surface roughness of the rubber so as to increase the friction of the rubber; the second frame bottom plate is used to place the support block and the fixed instrument to be calibrated;

[0012] The third type of frame bottom plate is in the shape of a rectangular block as a whole and is made of stainless steel. A rectangular groove is arranged from the left end to the right end of the frame bottom plate. Trapezoidal grooves are arranged on the front and rear sides of the groove respectively, which pass through the left and right ends. The groove part of the entire frame bottom plate does not pass through the bottom surface of the bottom plate. The third type of frame bottom plate is used for placing support blocks and fixed instruments to be calibrated.

[0013] Preferably, the support blocks include a first support block, a second support block and a third support block, and the first support block, the second support block and the third support block are used in conjunction with the first frame bottom plate, the second frame bottom plate and the third frame bottom plate respectively;

[0014] The first type of support block includes an elastic rubber block, a stainless steel block, and a magnetic rubber block. The elastic rubber block, the stainless steel block, and the magnetic rubber block are sequentially pasted together, and the contact surface between the elastic rubber block and the instrument to be tested is a slightly curved surface; the elastic rubber block, the stainless steel block, and the magnetic rubber block are respectively composed of elastic rubber, stainless steel, and magnetic rubber. Elastic rubber is a rubber material that quickly changes the shape of its own pressure contact surface when subjected to external pressure, and quickly returns to its original state when the external pressure disappears. The elastic rubber block utilizes this characteristic of elastic rubber to allow the upper surface of the support block to change the shape of the contact surface under the action of the gravity of the instrument to be calibrated, so that the support block can be in contact with the instrument to be calibrated to the maximum extent, thereby increasing the stability of the instrument to be calibrated. The stainless steel block is the skeleton of the entire support block, which can increase the distance between the instrument to be calibrated and the frame bottom plate, and provide convenience for calibration when there are air inlets, wiring ports, etc. under the instrument. The magnetic rubber block is used in conjunction with the upper magnetic rubber layer of the first frame bottom plate. Through the effect of magnetic force, the first support block can be fixed at any position of the first frame bottom plate. The first support block is used in a group of two, so that after adjusting the relative positions of the two support blocks, it can better fit the instruments to be calibrated of different shapes and sizes, and mainly plays the role of supporting and fixing the instruments to be calibrated;

[0015] The second type of support block includes an elastic rubber block, a stainless steel block, and a rough rubber block. The elastic rubber block, the stainless steel block, and the rough rubber block are sequentially pasted together. The contact surface between the elastic rubber block and the instrument to be tested is a slightly curved surface. The elastic rubber block, the stainless steel block, and the rough rubber block are respectively composed of elastic rubber, stainless steel, and rough rubber. Elastic rubber is a rubber material that quickly changes the shape of its own pressure contact surface when subjected to external pressure, and quickly returns to its original state when the external pressure disappears. The elastic rubber block utilizes this characteristic of elastic rubber to change the shape of the contact surface of the upper surface of the support block under the action of the gravity of the instrument to be calibrated, so that the support block can be in contact with the instrument to be calibrated to the maximum extent, thereby increasing the stability of the instrument to be calibrated. The stainless steel block is the skeleton of the entire support block, which can increase the distance between the instrument to be calibrated and the frame bottom plate, and provide convenience for calibration when there are air inlets, wiring ports, etc. under the instrument. The rough rubber block is used in conjunction with the rough rubber layer on the upper layer of the second frame bottom plate. By increasing the friction of the contact surface, the second support block can be fixed at any position of the second frame bottom plate. The second support block is used in a group of two. In this way, after adjusting the relative positions of the two support blocks, the instruments to be calibrated of different shapes and sizes can be better fitted. The main function is to support and fix the instruments to be calibrated.

[0016] The third type of support block includes an elastic rubber block, a stainless steel block, a rough rubber block and a trapezoidal protrusion. The elastic rubber block, the stainless steel block and the rough rubber block are sequentially pasted together, and the elastic rubber block, the stainless steel block and the rough rubber block are respectively composed of elastic rubber, stainless steel and rough rubber. Elastic rubber is a rubber material that quickly changes the shape of its pressure contact surface when subjected to external pressure, and quickly returns to its original state when the external pressure disappears. The elastic rubber block utilizes this characteristic of elastic rubber to change the shape of the contact surface on the upper surface of the support block under the action of the gravity of the instrument to be calibrated, so that the support block can be in contact with the instrument to be calibrated to the maximum extent, thereby increasing the stability of the instrument to be calibrated. The stainless steel block is the skeleton of the entire support block, which can increase the distance between the instrument to be calibrated and the frame bottom plate, and provide convenience for calibration when there are air inlets, wiring ports, etc. under the instrument. The contact surface between the elastic rubber block and the instrument to be tested is a slightly curved surface, the trapezoidal protrusion is composed of a stainless steel part and a rough rubber sheet pasted thereunder, wherein the stainless steel part of the trapezoidal protrusion and the stainless steel block are an integrally formed structure, the trapezoidal protrusion of the third support block is used in conjunction with the groove of the third frame bottom plate, the shape and size of the contact portion between the third support block and the third frame bottom plate match the shape and size of the rectangular groove and the trapezoidal groove of the third frame bottom plate, and an appropriate margin is left so that the support block can move along the groove of the frame bottom plate under the action of thrust, the function of the rough rubber block and the rough rubber sheet on the third support block is that when the support block is adjusted to a suitable position, the support block can be firmly fixed in a suitable position of the frame bottom plate by increasing the friction of the contact surface, the third support block needs to be used in a group of two, so that after adjusting the relative positions of the two support blocks, it can better fit the instruments to be calibrated of different shapes and sizes, and mainly plays the role of supporting and fixing the instruments to be calibrated.

[0017] Preferably, the fixing plate includes a plastic claw plate, a rubber claw plate and a moving plate. The plastic claw plate and the moving plate are both made of plastic and are an integrally formed structure. The rubber claw plate is made of rubber and is pasted on the inner side of the plastic claw plate for use. The plastic claw plate is slightly curved, and the moving plate has partial serrations and a hollow rectangular slot. The size of the serrations can be used in conjunction with gears.

[0018] Preferably, the rear cover is a stainless steel part formed in one piece by the positioning protrusion, the fixing protrusion, the central fixing column, the fixing spine and the rear cover plate, and the rear cover plate is a round stainless steel plate;

[0019] The positioning protrusion and the fixing protrusion are solid cylinders fixedly connected to the rear cover plate facing the front cover side. The specific number needs to be determined according to the size of the device and the size of the fixing plate. The positioning protrusion passes through the hollow rectangular card slot of the fixing plate when in use, and is used to limit the length of the fixing plate that can be extended and retracted. The fixing protrusion is used to fix the installation position of the fixing plate on the rear cover and the direction of extension and retraction on the rear cover.

[0020] The central fixing column is a hollow cylinder fixedly connected to the rear cover plate facing the front cover side, and is located at the center point of the circular rear cover plate. The heights of the positioning protrusion, the fixing protrusion and the central fixing column are all n times the thickness of the moving sheet.

[0021] The fixed spine is a solid cylinder with external threads on the surface, and is fixedly connected to the rear cover plate away from the front cover. The thread length of the fixed spine should be able to ensure that after rotating through the circular hole on the frame back plate and fully rotating and matching with the internal thread of the nut, there is still margin;

[0022] The nut is made of stainless steel, and has an internal thread on its inner wall. The size of the internal thread matches the external thread of the fixed spine. The nut and the fixed spine are used together to fix the rear cover to a suitable round hole position of the frame back plate.

[0023] Preferably, the front cover is an integrally formed stainless steel part consisting of a central column, a hollow fixed column and a front cover plate, and the height of the central column and the hollow fixed column are both n times the thickness of the moving sheet;

[0024] The center column is a solid cylinder that is fixedly connected to the side of the front cover plate facing the rear cover. It is located at the center point of the circular rear cover plate. Its size matches the hollow cylinder of the center fixing column and can be fully inserted into the center fixing column with appropriate margin for easy insertion and removal.

[0025] The hollow fixing column is a hollow stainless steel cylinder fixedly connected to the front cover facing the rear cover side, and its size matches the solid cylinder of the fixing protrusion, so that the fixing protrusion can be fully inserted into the hollow fixing column with appropriate margin for easy plugging and unplugging; the front cover is a round stainless steel plate.

[0026] Preferably, the gear is a cylinder with grooves and protrusions on its outer surface and a hollow cylinder inside; the gear is made of plastic, and the height of the gear cylinder is n times the thickness of the moving plate; the size of the hollow cylinder inside the gear matches the size of the outer cylinder of the central fixed column, and an appropriate margin is left to facilitate plugging and unplugging and rotation on the surface of the outer cylinder of the central fixed column, and the grooves and protrusions on the outer surface of the gear can be used in conjunction with the serrations on the fixed plate; after the device is assembled, when an external force pulls the fixed plate to move away from or closer to the central fixed column, the grooves and protrusions on the outer surface of the gear can engage with the serrations on the fixed plate to drive the gear to rotate and drive other fixed plates to move in their own predetermined directions.

[0027] Preferably, the gasket is a cylinder as a whole, and its interior is a hollow cylinder. The inner wall of the hollow cylinder has serrations that can be used in conjunction with the gear. The gasket is made of plastic as a whole. The height of each gasket's overall cylinder is the thickness of a moving plate. The outer diameter of the gasket should not be too small. When only a pair of fixed plates are used, the gasket can keep the fixed plate balanced and tightly engaged with the gear.

[0028] Preferably, when the fixing claw and the frame back plate are installed, when external force pulls the fixing plate to move away from the gear, the gear can be driven to rotate by the engagement of the grooves and protrusions on the outer surface of the gear with the serrations on the fixing plate. At the same time, if the device is installed with more than one set of fixing plates, other groups of fixing plates can be driven by the gear to move in the direction away from the gear. When the locking protrusion moves from one side of the rectangular slot of the fixing plate to the other side, the movement of all components stops; when external force pushes the fixing plate to move in the direction close to the gear, the same principle applies.

[0029] Preferably, the method for using the above-mentioned SF6 gas density relay verification support device to verify the SF6 gas density relay is as follows:

[0030] S1. Determine whether to use fixing claws based on the appearance, shape and size of the instrument to be calibrated. If only the frame and the support block are needed to firmly fix the instrument to be calibrated and the instrument calibration requirements are met, fixing claws may not be used. If fixing claws are needed, the number of fixing pieces m, the relative fixed position of the fixing pieces on the back cover, the number of washers and the position of the fixing claws installed on the frame back plate need to be determined based on actual conditions;

[0031] S2. Select the type of frame and support block according to the functional characteristics of the instrument to be calibrated. When the magnetic field affects the instrument calibration result, it is recommended to use the second frame and the second support block, or the third frame and the third support block. When the instrument calibration requires a pair of support blocks to be placed in a non-straight line, it is recommended to use the first frame and the first support block, or the second frame and the second support block.

[0032] S3. How to use the frame and support blocks: First, place the selected frame on a horizontal and firm plane, and then place the selected pair of support blocks on the frame bottom plate; if the first and second support blocks are selected, they can be placed directly in the selected position; if the third frame and the third support block combination is used, it is necessary to align the trapezoidal protrusions of a pair of support blocks with the grooves of the frame bottom plate, and manually slide the pair of support blocks along the grooves to the pre-selected positions; if the instrument calibration requirements are met without the use of fixed claws, the instrument to be calibrated can be directly placed on the support block, and the position of the support block can be fine-tuned. After confirming that the instrument to be calibrated has been firmly placed, the relevant calibration work can be carried out;

[0033] S4. If you need to use fixing claws to assist in fixing the instrument to be inspected, you need to follow the following method for installing the fixing claws: first, screw the fixing spine on the back cover into the selected circular hole on the frame back plate, and fix the two with a nut; then completely cover the gear on the outer surface of the central fixing column; then completely cover the washer on the outer surface of the gear, and ensure that it fully engages with the gear; next, according to the pre-selected number of fixed plates used, m, and its relative position with the back cover, place each pair of fixing plates between the corresponding pairs of fixing protrusions on the back cover in turn, and make the corresponding position of the positioning protrusions pass through the corresponding hollow rectangular slots of the fixing plates; before inserting the fixing plates, rotate the gears appropriately to ensure that the serrations on the fixing plates can fully engage with the gears; finally, align the central column on the front cover with the central fixing column on the back cover, and align the hollow fixing column on the front cover with the corresponding fixing protrusion on the back cover, use external force to combine the front cover and the back cover together, and finally fix the fixing claws to the frame back plate;

[0034] S5. Method for installing the instrument to be inspected on the fixed claw: when one of the pairs of fixed plates is pulled by external force to move in the direction away from the gear, the gear is driven to rotate by the grooves and protrusions on the outer surface of the gear engaging with the serrations on the fixed plate. At the same time, if the device is installed with more than one set of fixed plates, the other groups of fixed plates can be driven by the gear to move in the direction away from the gear. When the positioning protrusion moves from one side of the rectangular slot of the fixed plate to the other side, the movement of all components stops; at this time, place the meter head to be inspected within the range surrounded by the fixed claw; use external force to push one of the pairs of fixed plates to move in the direction close to the gear, and the gear is driven to rotate in the opposite direction by the grooves and protrusions on the outer surface of the gear engaging with the serrations on the fixed plate. At the same time, if the device is installed with more than one set of fixed plates, the other groups of fixed plates can be driven by the gear to move in the direction close to the gear. When the fixed claw completely and effectively wraps the edge of the instrument to be inspected, stop pushing the fixed plate;

[0035] S6. Appropriately fine-tune the position of the support block so that the instrument to be inspected is firmly placed on the support block to meet the instrument calibration requirements;

[0036] S7. Carry out relevant instrument inspection work;

[0037] S8. After the instrument inspection is completed, fine-tune the position of the support block appropriately to ensure that there is space for the fixed claw to move while continuing to support the weight of the instrument to be inspected; use external force to pull one pair of fixed plates to move in the direction away from the gear, and the grooves and protrusions on the outer surface of the gear engage with the serrations on the fixed plate to drive the gear to rotate. At the same time, if the device is equipped with more than one set of fixed plates, the other groups of fixed plates can be driven by the gear to move in the direction away from the gear. When the positioning protrusion moves from one side of the rectangular slot of the fixed plate to the other side, all components stop moving, and the instrument to be inspected is removed;

[0038] S9. If the instrument calibration device is not needed in the short term, the fixing claws can be removed in the order of front cover, fixing plate, washer, gear, nut, and rear cover, and then the support block can be removed;

[0039] S10. If you need to calibrate instruments of other sizes, you can reassemble them in the order of S9, S1, S2, S3, S4, S5, S6, S7, and S8 and use them.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] The present invention provides a calibration support device specially designed for the characteristics of SF6 gas density relays and a method for using the same. This calibration support device can adjust the number, size and installation position of its own fixing claws and the position of the support block according to the specific conditions of the appearance size, air inlet position and wiring position of the SF6 gas density relay to meet the requirements of long-term verticality and stability during the calibration of the SF6 gas density relay, and effectively avoid errors caused by human control, gas path blockage, and poor contact of electric shock signals. When not in use, it can be easily disassembled and stored, taking up less space and saving space. The whole is made of plastic, stainless steel and rubber, and is durable. Moreover, this instrument calibration support device can not only be used in the field of SF6 gas density relay calibration, but also can be widely used in other instrument calibration fields due to its strong adjustability. This instrument calibration support device is made of sturdy and durable materials and is simple to use, which can greatly improve work efficiency and reduce work costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0044] Figure 2 A schematic diagram of a first framework structure provided in an embodiment of the present invention;

[0045] Figure 3 A schematic diagram of a second framework structure provided by an embodiment of the present invention;

[0046] Figure 4 A schematic diagram of a third framework structure provided by an embodiment of the present invention;

[0047] Figure 5 A schematic diagram of a first supporting block structure provided by an embodiment of the present invention;

[0048] Figure 6 A schematic diagram of a second support block structure provided by an embodiment of the present invention;

[0049] Figure 7 A schematic diagram of a third supporting block structure provided by an embodiment of the present invention;

[0050] Figure 8 A schematic cross-sectional view of a third support block provided by an embodiment of the present invention;

[0051] Fig. 9 A schematic diagram of the structure of a fixing plate provided in an embodiment of the present invention;

[0052] Fig.10 A schematic diagram of a rear cover facing the front cover provided by an embodiment of the present invention;

[0053] Fig.11 A schematic diagram of a rear cover away from a front cover provided by an embodiment of the present invention;

[0054] Fig.12 A schematic side view of a rear cover provided by an embodiment of the present invention;

[0055] Fig.13 A schematic diagram of a nut provided in an embodiment of the present invention;

[0056] Fig.14 A schematic diagram of a front cover away from a rear cover provided by an embodiment of the present invention;

[0057] Fig.15 A schematic diagram of the front cover and rear cover side view provided by an embodiment of the present invention;

[0058] Fig.16 A schematic diagram of a gear structure provided in an embodiment of the present invention;

[0059] Fig.17 A schematic diagram of a gasket structure provided in an embodiment of the present invention;

[0060] Fig.18 A schematic diagram of the working principle of the fixing claw provided in an embodiment of the present invention;

[0061] Fig.19 A schematic diagram of an SF6 gas density relay provided in an embodiment of the present invention;

[0062] Fig. 20 This is a diagram showing an example of the use of the SF6 gas density relay calibration support device provided in an embodiment of the present invention.

[0063] In the figure: 1. frame; 2. support block; 3. fixing claw;

[0064] 101, the first frame bottom plate; 102, the frame back plate; 103, the second frame bottom plate; 104, the third frame bottom plate;

[0065] 201, elastic rubber block; 202, stainless steel block; 203, magnetic rubber block; 204, rough rubber block; 205, trapezoidal protrusion; 206, rough rubber sheet;

[0066] 301, plastic claw piece; 302, rubber claw piece; 303, moving piece; 304, center column; 305, hollow fixed column; 306, positioning protrusion; 307, fixing protrusion; 308, center fixed column; 309, fixed spine; 310, rear cover plate; 311, front cover plate; 312, gear; 313, gasket. DETAILED DESCRIPTION

[0067] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0068] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0069] The present invention provides the following embodiments

[0070] Example 1

[0071] The present invention provides a SF6 gas density relay calibration support device, comprising a frame 1, a support block 2 and a fixing claw 3, wherein the fixing claw 3 is composed of a fixing plate 301, a gasket 313, a front cover 304, a rear cover 306, a nut, and a gear 312. The entire device is made of rubber, stainless steel and plastic. The bottom of the support block 2 is placed in contact with the bottom of the frame 1. The fixing claw 3 is connected to the frame back plate through the front cover 304, the rear cover 306 and the nut, such as Figure 1 shown.

[0072] Reference Figure 2 The first frame is composed of a frame back plate 102 and a first frame bottom plate 101. The frame plays the role of auxiliary fixing and supporting, and is the frame of the entire device. The frame back plate 102 is a rectangular parallelepiped shape, 100mm long, 5mm wide, 300mm high, and is made of stainless steel. A number of circular holes are evenly distributed on the back plate, the inner wall of the circular hole has an internal thread, the inner diameter of the circular hole is 10mm, the shortest distance between the outer edges of adjacent circular holes is 10mm, and the circular holes are connected to the fixing claws. The first frame bottom plate 101 is a rectangular parallelepiped shape, 300mm long, 200mm wide, and 10mm high. Its upper layer is made of magnetic rubber material, the thickness of the magnetic rubber is 5mm, and the lower layer is made of stainless steel material, the thickness of the stainless steel material is 5mm, and the upper layer is pasted on the lower layer for use. Magnetic rubber is a rubber with magnetic properties added during the rubber processing process. The first frame bottom plate 101 is used to place the support block and the fixed instrument to be calibrated.

[0073] Reference Figure 5 , the first type of support block is composed of an elastic rubber block 201, a stainless steel block 202, and a magnetic rubber block 203. The elastic rubber block 201, the stainless steel block 202, and the magnetic rubber block 203 are sequentially pasted together. The elastic rubber block 201 is 40mm long, 90mm wide, 10mm low, and 20mm high, and its contact surface with the instrument to be tested is a slightly curved surface. The stainless steel block 202 is 40mm long, 90mm wide, and 80mm high. The magnetic rubber block 203 is 40mm long, 90mm wide, and 5mm high. The elastic rubber block 201, the stainless steel block 202, and the magnetic rubber block 203 are respectively composed of elastic rubber, stainless steel, and magnetic rubber. Elastic rubber is a rubber material that quickly changes the shape of its own pressure contact surface when subjected to external pressure, and quickly returns to its original state when the external pressure disappears. The elastic rubber block 201 utilizes the characteristic of elastic rubber to change the shape of the contact surface of the upper surface of the support block under the action of the gravity of the instrument to be calibrated, so that the support block can contact and match the instrument to be calibrated to the maximum extent, thereby increasing the stability of the instrument to be calibrated. The stainless steel block 202 is the skeleton of the entire support block, which can increase the distance between the instrument to be calibrated and the frame bottom plate, and provide convenience for calibration when there are air inlets, wiring ports, etc. under the instrument. The magnetic rubber block 203 is used in conjunction with the upper magnetic rubber layer of the first frame bottom plate 101. Through the action of magnetic force, the support block can be firmly fixed at any position of the frame bottom plate. The first type of support block needs to be used in a group of two, so that after adjusting the relative positions of the two support blocks, it can better fit the instruments to be calibrated of different shapes and sizes, and mainly plays the role of supporting and fixing the instruments to be calibrated.

[0074] Reference Fig. 9 The fixed plate is composed of a plastic claw plate 301, a rubber claw plate 302 and a moving plate 303. The plastic claw plate 301 and the moving plate 303 are both made of plastic and are an integrated molding structure. The rubber claw plate 302 is made of rubber and is pasted on the inside of the plastic claw plate 301 for use. The plastic claw plate 301 is slightly curved. The plastic claw plate 301 is 50mm long, 18mm wide and 2mm thick. The rubber claw plate 302 is 50mm long, 18mm wide and 3mm thick. The moving plate 303 has partial serrations and a hollow rectangular slot. The size of the serrations can be used in conjunction with gears. The longest part of the moving plate 303 is 75mm, the shortest part is 25mm, the width is 18mm and the thickness is 5mm. Refer to Fig.10 When the fixing piece is installed at the corresponding position of the back cover, the positioning protrusion 306 on the back cover will pass through the hollow rectangular slot, and the hollow rectangular slot and the positioning protrusion 306 cooperate to limit the expansion and contraction size of the fixing piece. The hollow rectangular slot is 10 mm long and 3 mm wide.

[0075] Reference Fig.10 , 11 , 12, the rear cover is a stainless steel part formed in one piece by a positioning protrusion 306, a fixing protrusion 307, a central fixing column 308, a fixing spine 309 and a rear cover plate 310. The rear cover plate 310 is a circular stainless steel plate with a diameter of 80 mm and a thickness of 2 mm. The positioning protrusion 306 and the fixing protrusion 307 are solid cylinders fixedly connected to the rear cover plate 310 facing the front cover side, and the specific number needs to be determined according to the size of the device and the size of the fixing plate. When in use, the positioning protrusion 306 passes through the hollow rectangular slot of the fixing plate to limit the length of the fixing plate that can be extended and retracted. The fixing protrusion 307 is used to fix the installation position of the fixing plate on the rear cover and the direction of extension and retraction on the rear cover. The central fixing column 308 is a hollow cylinder fixedly connected to the rear cover plate 310 facing the front cover side, and is located at the center point of the circular rear cover plate 310. The height of the positioning protrusion 306, the fixing protrusion 307 and the central fixing column 308 is n times the thickness of the moving plate 303 (i.e., the complete set of devices is preset with n pairs of fixing plates). When n=2, the number of the positioning protrusions 306 is 12, the diameter is 2mm, and the height is 10mm; the number of the fixing protrusions 307 is 12, the diameter is 2mm, and the height is 10mm; the outer diameter of the central fixing column 308 is 4mm, the inner diameter is 2mm, and the height is 10mm. The fixing spine 309 is a solid cylinder with external threads on the surface, and is fixedly connected to the rear cover plate 310 away from the front cover side. The diameter of the fixing spine 309 is 10mm, and the thread length of the fixing spine 309 should be able to ensure that after rotating through the circular hole on the frame back plate and fully rotating with the internal thread of the nut, there is still margin.

[0076] Reference Fig.13The nut is made of stainless steel, and its center is penetrated by a hollow cylinder. The inner wall of the hollow cylinder has an internal thread, and the size of the internal thread matches the external thread of the fixed spine 309. The inner diameter of the nut is 10mm, the maximum outer diameter is 14mm, and the thickness is 7mm. The nut is used in conjunction with the fixed spine 309 to fix the back cover to a suitable circular hole position on the frame back plate.

[0077] Reference Fig.14 , 15 The front cover is an integrally formed stainless steel part consisting of a central column 304, a hollow fixed column 305 and a front cover plate 311. The height of the central column 304 and the hollow fixed column 305 are both n times the thickness of the moving sheet 303 (that is, the complete set of devices is preset with n pairs of fixed sheets). When n=2, the diameter of the central column 304 is 2mm and the height is 10mm; the inner diameter of the hollow fixed column 305 is 2mm, the outer diameter is 4mm, and the height is 10mm. The central column 304 is a solid cylinder fixedly connected to the front cover plate 311 facing the rear cover side, and is located at the center point of the circular rear cover plate. Its size matches the hollow cylinder of the central fixed column 308, and can be fully inserted into the central fixed column 308, leaving an appropriate margin for easy plugging and unplugging. The hollow fixing column 305 is a hollow stainless steel cylinder fixedly connected to the front cover 311 facing the rear cover, and its size matches the solid cylinder of the fixing protrusion 307, so that the fixing protrusion 307 can be fully inserted into the hollow fixing column 305, and a proper margin is left for easy plugging and unplugging. The front cover 311 is a round stainless steel plate with a diameter of 80 mm and a thickness of 2 mm.

[0078] Reference Fig.16 , the gear 312 is a cylinder with grooves and protrusions on its outer surface and a hollow cylinder inside. The gear is made of plastic. The height of the gear cylinder is n times the thickness of the moving plate 303 (that is, the complete set of devices presets n pairs of fixed plates). When n=2, the outer diameter of the gear is 6mm, the inner diameter is 4mm, and the height is 10mm. The size of the hollow cylinder inside the gear matches the size of the outer cylinder of the central fixed column 308, and an appropriate margin is left to facilitate plugging and unplugging and rotation on the outer cylinder surface of the central fixed column 308. The grooves and protrusions on the outer surface of the gear can be used in conjunction with the serrations on the fixed plate. After the device is assembled, when an external force pulls the fixed plate to move away from or close to the central fixed column 308, the grooves and protrusions on the outer surface of the gear can engage with the serrations on the fixed plate to drive the gear to rotate and drive other fixed plates to move in their own predetermined directions.

[0079] Reference Fig.17The gasket 313 is a cylinder as a whole, and its interior is a hollow cylinder. The inner wall of the hollow cylinder has serrations that can be used with the gear. The gasket is made of plastic as a whole. The height of each gasket cylinder is the thickness of a moving plate 303. The outer diameter of the gasket should not be too small. When only one pair of fixed plates is used, the gasket can keep the fixed plate balanced and tightly engaged with the gear. The outer diameter of the gasket is 18mm, the inner diameter is 6mm, and the height is 5mm.

[0080] Reference Fig.18 , when the fixing claw and the frame back plate 102 are installed, when the external force pulls the fixing plate to move in the direction of the black thick arrow (i.e., moving away from the gear direction), the grooves and protrusions on the outer surface of the gear can be engaged with the serrations on the fixing plate to drive the gear to rotate in the direction of the black thin arrow. At the same time, if the device is equipped with more than one set of fixing plates, the other sets of fixing plates can be driven by the gear to move in the direction away from the gear. When the positioning protrusion 306 moves from the G end to the H end, all components stop moving. When the external force pushes the fixing plate to move in the opposite direction along the black thick arrow (i.e., moving close to the gear direction), the grooves and protrusions on the outer surface of the gear can be engaged with the serrations on the fixing plate to drive the gear to rotate in the opposite direction along the black thin arrow. At the same time, if the device is equipped with more than one set of fixing plates, the other sets of fixing plates can be driven by the gear to move in the direction close to the gear. When the positioning protrusion 306 moves from the H end to the G end, all components stop moving.

[0081] Example 2

[0082] The present invention provides a SF6 gas density relay calibration support device, comprising a frame 1, a support block 2 and a fixing claw 3, wherein the fixing claw 3 is composed of a fixing plate 301, a gasket 313, a front cover 304, a rear cover 306, a nut, and a gear 312. The entire device is made of rubber, stainless steel and plastic. The bottom of the support block 2 is placed in contact with the bottom of the frame 1. The fixing claw 3 is connected to the frame back plate through the front cover 304, the rear cover 306 and the nut, such as Figure 1 shown.

[0083] Reference Figure 3The second frame is composed of a frame back plate 102 and a second frame bottom plate 103. The frame plays the role of auxiliary fixing and supporting, and is the frame of the entire device. The frame back plate 102 is a rectangular parallelepiped shape, 100mm long, 5mm wide, 300mm high, and is made of stainless steel. A number of circular holes are evenly distributed on the back plate, the inner wall of the circular hole has an internal thread, the inner diameter of the circular hole is 10mm, the shortest distance between the outer edges of adjacent circular holes is 10mm, and the circular holes are connected to the fixing claws. The second frame bottom plate 103 is a rectangular parallelepiped shape, the upper layer of which is made of rough rubber material, the thickness of the rough rubber is 5mm, and the lower layer is made of stainless steel material, the thickness of the stainless steel material is 5mm, and the upper layer is pasted on the lower layer for use. Rough rubber is processed into a rough shape to increase the surface roughness of the rubber to achieve the effect of increasing the friction of the rubber. The second frame bottom plate 103 is used to place the support block and the fixed instrument to be calibrated.

[0084] Reference Figure 6 , the second support block is composed of an elastic rubber block 201, a stainless steel block 202, and a rough rubber block 204. The elastic rubber block 201, the stainless steel block 202, and the rough rubber block 204 are sequentially pasted together. The elastic rubber block 201 is 40mm long, 90mm wide, 10mm low, and 20mm high, and its contact surface with the instrument to be tested is a slightly curved surface. The stainless steel block 202 is 40mm long, 90mm wide, and 80mm high. The rough rubber block 204 is 40mm long, 90mm wide, and 5mm high. The elastic rubber block 201, the stainless steel block 202, and the rough rubber block 204 are respectively composed of elastic rubber, stainless steel, and rough rubber. Elastic rubber is a rubber material that quickly changes the shape of its own pressure contact surface when subjected to external pressure, and quickly returns to its original state when the external pressure disappears. The elastic rubber block 201 utilizes the characteristic of elastic rubber to change the shape of the contact surface under the action of the gravity of the instrument to be calibrated on the upper surface of the support block, so that the support block can contact and match the instrument to be calibrated to the maximum extent, thereby increasing the stability of the instrument to be calibrated. The stainless steel block 202 is the skeleton of the entire support block, which can increase the distance between the instrument to be calibrated and the frame bottom plate 103, and provide convenience for calibration when there are air inlets, wiring ports, etc. under the instrument. The rough rubber block 204 is used in conjunction with the rough rubber layer on the upper layer of the second frame bottom plate 103. By increasing the friction of the contact surface, the support block can be firmly fixed at any position of the frame bottom plate 103. The second type of support block needs to be used in a group of two, so that after adjusting the relative positions of the two support blocks, it can better fit the instruments to be calibrated of different shapes and sizes, and mainly plays the role of supporting and fixing the instruments to be calibrated.

[0085] Reference Fig. 9The fixed plate is composed of a plastic claw plate 301, a rubber claw plate 302 and a moving plate 303. The plastic claw plate 301 and the moving plate 303 are both made of plastic and are an integrated molding structure. The rubber claw plate 302 is made of rubber and is pasted on the inside of the plastic claw plate 301 for use. The plastic claw plate 301 is slightly curved. The plastic claw plate 301 is 50mm long, 18mm wide and 2mm thick. The rubber claw plate 302 is 50mm long, 18mm wide and 3mm thick. The moving plate 303 has partial serrations and a hollow rectangular slot. The size of the serrations can be used in conjunction with gears. The longest part of the 303 moving claw plate is 75mm, the shortest part is 25mm, the width is 18mm and the thickness is 5mm. Refer to Fig.10 When the fixing piece is installed at the corresponding position of the back cover, the positioning protrusion 306 on the back cover will pass through the hollow rectangular slot, and the hollow rectangular slot and the positioning protrusion 306 cooperate to limit the expansion and contraction size of the fixing piece. The hollow rectangular slot is 10 mm long and 3 mm wide.

[0086] Reference Fig.10 , 11 , 12, the rear cover is a stainless steel part formed in one piece by a positioning protrusion 306, a fixing protrusion 307, a central fixing column 308, a fixing spine 309 and a rear cover plate 310. The rear cover plate 310 is a circular stainless steel plate with a diameter of 80 mm and a thickness of 2 mm. The positioning protrusion 306 and the fixing protrusion 307 are solid cylinders fixedly connected to the rear cover plate 310 facing the front cover side, and the specific number needs to be determined according to the size of the device and the size of the fixing plate. When in use, the positioning protrusion 306 passes through the hollow rectangular slot of the fixing plate to limit the length of the fixing plate that can be extended and retracted. The fixing protrusion 307 is used to fix the installation position of the fixing plate on the rear cover and the direction of extension and retraction on the rear cover. The central fixing column 308 is a hollow cylinder fixedly connected to the rear cover plate 310 facing the front cover side, and is located at the center point of the circular rear cover plate 310. The height of the positioning protrusion 306, the fixing protrusion 307 and the central fixing column 308 is n times the thickness of the moving plate 303 (i.e., the complete set of devices is preset with n pairs of fixing plates). When n=2, the number of the positioning protrusions 306 is 12, the diameter is 2mm, and the height is 10mm; the number of the fixing protrusions 307 is 12, the diameter is 2mm, and the height is 10mm; the outer diameter of the central fixing column 308 is 4mm, the inner diameter is 2mm, and the height is 10mm. The fixing spine 309 is a solid cylinder with external threads on the surface, and is fixedly connected to the rear cover plate 310 away from the front cover side. The diameter of the fixing spine 309 is 10mm, and the thread length of the fixing spine 309 should be able to ensure that after rotating through the circular hole on the frame back plate and fully rotating with the internal thread of the nut, there is still margin.

[0087] Reference Fig.13The nut is made of stainless steel, and its center is penetrated by a hollow cylinder. The inner wall of the hollow cylinder has an internal thread, and the size of the internal thread matches the external thread of the fixed spine 309. The inner diameter of the nut is 10mm, the maximum outer diameter is 14mm, and the thickness is 7mm. The nut is used in conjunction with the fixed spine 309 to fix the back cover to a suitable circular hole position on the frame back plate.

[0088] Reference Fig.14 , 15 The front cover is an integrally formed stainless steel part consisting of a central column 304, a hollow fixed column 305 and a front cover plate 311. The height of the central column 304 and the hollow fixed column 305 are both n times the thickness of the moving sheet 303 (that is, the complete set of devices is preset with n pairs of fixed sheets). When n=2, the diameter of the central column 304 is 2mm and the height is 10mm; the inner diameter of the hollow fixed column 305 is 2mm, the outer diameter is 4mm, and the height is 10mm. The central column 304 is a solid cylinder fixedly connected to the side of the front cover plate 311 facing the rear cover, and is located at the center point of the circular rear cover plate 311. Its size matches the hollow cylinder of the central fixed column 308, and it can be fully inserted into the central fixed column 308, leaving an appropriate margin for easy plugging and unplugging. The hollow fixing column 305 is a hollow stainless steel cylinder fixedly connected to the front cover 311 facing the rear cover, and its size matches the solid cylinder of the fixing protrusion 307, so that the fixing protrusion 307 can be fully inserted into the hollow fixing column 305, and a proper margin is left for easy plugging and unplugging. The front cover 311 is a round stainless steel plate with a diameter of 80 mm and a thickness of 2 mm.

[0089] Reference Fig.16 , the gear 312 is a cylinder with grooves and protrusions on its outer surface and a hollow cylinder inside. The gear is made of plastic. The height of the gear cylinder is n times the thickness of the moving plate 303 (that is, the complete set of devices presets n pairs of fixed plates). When n=2, the outer diameter of the gear is 6mm, the inner diameter is 4mm, and the height is 10mm. The size of the hollow cylinder inside the gear matches the size of the outer cylinder of the central fixed column 308, and an appropriate margin is left to facilitate plugging and unplugging and rotation on the outer cylinder surface of the central fixed column 308. The grooves and protrusions on the outer surface of the gear can be used in conjunction with the serrations on the fixed plate. After the device is assembled, when an external force pulls the fixed plate to move away from or close to the central fixed column 308, the grooves and protrusions on the outer surface of the gear can engage with the serrations on the fixed plate to drive the gear to rotate and drive other fixed plates to move in their own predetermined directions.

[0090] Reference Fig.17The gasket 313 is a cylinder as a whole, and its interior is a hollow cylinder. The inner wall of the hollow cylinder has serrations that can be used with the gear. The gasket is made of plastic as a whole. The height of each gasket cylinder is the thickness of a moving plate 303. The outer diameter of the gasket should not be too small. When only one pair of fixed plates is used, the gasket can keep the fixed plate balanced and tightly engaged with the gear. The outer diameter of the gasket is 18mm, the inner diameter is 6mm, and the height is 5mm.

[0091] Reference Fig.18 , when the fixing claw and the frame back plate 102 are installed, when the external force pulls the fixing plate to move in the direction of the black thick arrow (i.e., moving away from the gear direction), the grooves and protrusions on the outer surface of the gear can be engaged with the serrations on the fixing plate to drive the gear to rotate in the direction of the black thin arrow. At the same time, if the device is equipped with more than one set of fixing plates, the other sets of fixing plates can be driven by the gear to move in the direction away from the gear. When the positioning protrusion 306 moves from the G end to the H end, all components stop moving. When the external force pushes the fixing plate to move in the opposite direction along the black thick arrow (i.e., moving close to the gear direction), the grooves and protrusions on the outer surface of the gear can be engaged with the serrations on the fixing plate to drive the gear to rotate in the opposite direction along the black thin arrow. At the same time, if the device is equipped with more than one set of fixing plates, the other sets of fixing plates can be driven by the gear to move in the direction close to the gear. When the positioning protrusion 306 moves from the H end to the G end, all components stop moving.

[0092] Example 3

[0093] The present invention provides a SF6 gas density relay calibration support device, comprising a frame 1, a support block 2 and a fixing claw 3, wherein the fixing claw 3 is composed of a fixing plate 301, a gasket 313, a front cover 304, a rear cover 306, a nut, and a gear 312. The entire device is made of rubber, stainless steel and plastic. The bottom of the support block 2 is placed in contact with the bottom of the frame 1. The fixing claw 3 is connected to the frame back plate through the front cover 304, the rear cover 306 and the nut, such as Figure 1 shown.

[0094] Reference Figure 4The third frame is composed of a frame back plate 102 and a third frame bottom plate 104. The frame plays the role of auxiliary fixing and supporting, and is the frame of the entire device. The frame back plate 102 is a rectangular parallelepiped shape, 100mm long, 5mm wide, 300mm high, and is made of stainless steel. A number of circular holes are evenly distributed on the back plate, the inner wall of the circular hole has internal threads, the shortest distance between the outer edges of adjacent circular holes is 10mm, and the circular holes are connected to the fixing claws. The third frame bottom plate 104 is a rectangular parallelepiped shape as a whole, 300mm long, 200mm wide, 30mm high, and is made of stainless steel. There is a rectangular parallelepiped groove running through the frame bottom plate 104A end to the B end, the groove is 300mm long, 90mm wide, and 25mm deep. There are trapezoidal grooves running through the A end and the B end on the C side and the D side of the groove respectively. The groove part of the entire frame bottom plate 104 does not run through the bottom surface of the bottom plate. The third frame bottom plate 104 is used to place the support blocks and the fixed instruments to be calibrated.

[0095] Reference Figure 7 The third type of support block is composed of an elastic rubber block 201, a stainless steel block 202, a rough rubber block 204 and a trapezoidal protrusion 205. The elastic rubber block 201, the stainless steel block 202 and the rough rubber block 204 are sequentially pasted together. The elastic rubber block 201 is 40mm long, 90mm wide, 10mm in the lowest height and 20mm in the highest height. Its contact surface with the instrument to be tested is a slightly curved surface. The stainless steel block 202 is 40mm long, 90mm wide and 80mm high. The rough rubber block 204 is 40mm long, 90mm wide and 5mm high. Figure 8The trapezoidal protrusion 205 is composed of a stainless steel part and a rough rubber sheet 206 pasted thereunder, wherein the stainless steel part of the trapezoidal protrusion 205 and the stainless steel block 202 are an integrally formed structure. The trapezoidal protrusion 205 is a right-angled trapezoidal protrusion, with an upper base of 5 mm, a lower base of 10 mm, and a height of 8 mm. The thickness of the rough rubber sheet 206 is 5 mm. The elastic rubber block 201, the stainless steel block 202, and the rough rubber block 204 are respectively composed of elastic rubber, stainless steel, and rough rubber. Elastic rubber is a rubber material that quickly changes the shape of its own pressure contact surface when subjected to external pressure, and quickly returns to its original state when the external pressure disappears. The elastic rubber block 201 utilizes this characteristic of elastic rubber to allow the upper surface of the support block to change the shape of the contact surface under the action of the gravity of the instrument to be calibrated, so that the support block can be in contact with the instrument to be calibrated to the greatest extent, thereby increasing the stability of the instrument to be calibrated. The stainless steel block 202 is the skeleton of the entire support block, which can increase the distance between the instrument to be calibrated and the frame bottom plate 104, and provide convenience for calibration when there are air inlets, wiring ports, etc. under the instrument. The trapezoidal protrusion 205 of the third support block is used in conjunction with the groove of the third frame bottom plate 104. The shape and size of the contact portion of the third support block with the frame bottom plate 104 match the shape and size of the grooves that penetrate the A end and the B end on the C side and the D side of the frame bottom plate 104, respectively, and leave an appropriate margin so that the support block can move along the groove of the frame bottom plate 104 under the action of thrust. Considering that the third support block needs to move in the groove of the frame bottom plate 104 to determine the final appropriate position, the frame bottom plate 104 itself does not have a rough rubber layer in order to reduce the friction resistance of the third support block when it moves. The role of the rough rubber block 204 and the rough rubber sheet 206 on the third support block is to increase the friction of the contact surface when the support block is adjusted to the appropriate position, so that the support block can be firmly fixed in the appropriate position of the frame bottom plate 104. The third type of support block needs to be used in a group of two, so that after adjusting the relative positions of the two support blocks, it can better fit the instruments to be calibrated of different shapes and sizes, and mainly plays the role of supporting and fixing the instruments to be calibrated.

[0096] Reference Fig. 9 The fixed plate is composed of a plastic claw plate 301, a rubber claw plate 302 and a moving plate 303. The plastic claw plate 301 and the moving plate 303 are both made of plastic and are an integrated molding structure. The rubber claw plate 302 is made of rubber and is pasted on the inside of the plastic claw plate 301 for use. The plastic claw plate 301 is slightly curved. The plastic claw plate 301 is 50mm long, 18mm wide and 2mm thick. The rubber claw plate 302 is 50mm long, 18mm wide and 3mm thick. The moving plate 303 has partial serrations and a hollow rectangular slot. The size of the serrations can be used in conjunction with gears. The longest part of the 303 moving claw plate is 75mm, the shortest part is 25mm, the width is 18mm and the thickness is 5mm. Refer to Fig.10When the fixing piece is installed at the corresponding position of the back cover, the positioning protrusion 306 on the back cover will pass through the hollow rectangular slot, and the hollow rectangular slot and the positioning protrusion 306 cooperate to limit the expansion and contraction size of the fixing piece. The hollow rectangular slot is 10 mm long and 3 mm wide.

[0097] Reference Fig.10 , 11 , 12, the rear cover is a stainless steel part formed in one piece by a positioning protrusion 306, a fixing protrusion 307, a central fixing column 308, a fixing spine 309 and a rear cover plate 310. The rear cover plate 310 is a circular stainless steel plate with a diameter of 80 mm and a thickness of 2 mm. The positioning protrusion 306 and the fixing protrusion 307 are solid cylinders fixedly connected to the rear cover plate 310 facing the front cover side, and the specific number needs to be determined according to the size of the device and the size of the fixing plate. When in use, the positioning protrusion 306 passes through the hollow rectangular slot of the fixing plate to limit the length of the fixing plate that can be extended and retracted. The fixing protrusion 307 is used to fix the installation position of the fixing plate on the rear cover and the direction of extension and retraction on the rear cover. The central fixing column 308 is a hollow cylinder fixedly connected to the rear cover plate 310 facing the front cover side, and is located at the center point of the circular rear cover plate 310. The height of the positioning protrusion 306, the fixing protrusion 307 and the central fixing column 308 is n times the thickness of the moving plate 303 (i.e., the complete set of devices is preset with n pairs of fixing plates). When n=2, the number of the positioning protrusions 306 is 12, the diameter is 2mm, and the height is 10mm; the number of the fixing protrusions 307 is 12, the diameter is 2mm, and the height is 10mm; the outer diameter of the central fixing column 308 is 4mm, the inner diameter is 2mm, and the height is 10mm. The fixing spine 309 is a solid cylinder with external threads on the surface, and is fixedly connected to the rear cover plate 310 away from the front cover side. The diameter of the fixing spine 309 is 10mm, and the thread length of the fixing spine 309 should be able to ensure that after rotating through the circular hole on the frame back plate and fully rotating with the internal thread of the nut, there is still margin.

[0098] Reference Fig.13 The nut is made of stainless steel, and its center is penetrated by a hollow cylinder. The inner wall of the hollow cylinder has an internal thread, and the size of the internal thread matches the external thread of the fixed spine 309. The inner diameter of the nut is 10mm, the maximum outer diameter is 14mm, and the thickness is 7mm. The nut is used in conjunction with the fixed spine 309 to fix the back cover to a suitable circular hole position on the frame back plate.

[0099] Reference Fig.14 , 15The front cover is an integrally formed stainless steel part consisting of a central column 304, a hollow fixed column 305 and a front cover plate 311. The height of the central column 304 and the hollow fixed column 305 are both n times the thickness of the moving sheet 303 (that is, the complete set of devices is preset with n pairs of fixed sheets). When n=2, the diameter of the central column 304 is 2mm and the height is 10mm; the inner diameter of the hollow fixed column 305 is 2mm, the outer diameter is 4mm, and the height is 10mm. The central column 304 is a solid cylinder fixedly connected to the side of the front cover plate 311 facing the rear cover, and is located at the center point of the circular rear cover plate 311. Its size matches the hollow cylinder of the central fixed column 308, and it can be fully inserted into the central fixed column 308, leaving an appropriate margin for easy plugging and unplugging. The hollow fixing column 305 is a hollow stainless steel cylinder fixedly connected to the front cover 311 facing the rear cover, and its size matches the solid cylinder of the fixing protrusion 307, so that the fixing protrusion 307 can be fully inserted into the hollow fixing column 305, and a proper margin is left for easy plugging and unplugging. The front cover 311 is a round stainless steel plate with a diameter of 80 mm and a thickness of 2 mm.

[0100] Reference Fig.16 , the gear 312 is a cylinder with grooves and protrusions on its outer surface and a hollow cylinder inside. The gear is made of plastic. The height of the gear cylinder is n times the thickness of the moving plate 303 (that is, the complete set of devices presets n pairs of fixed plates). When n=2, the outer diameter of the gear is 6mm, the inner diameter is 4mm, and the height is 10mm. The size of the hollow cylinder inside the gear matches the size of the outer cylinder of the central fixed column 308, and an appropriate margin is left to facilitate plugging and unplugging and rotation on the outer cylinder surface of the central fixed column 308. The grooves and protrusions on the outer surface of the gear can be used in conjunction with the serrations on the fixed plate. After the device is assembled, when an external force pulls the fixed plate to move away from or close to the central fixed column 308, the grooves and protrusions on the outer surface of the gear can engage with the serrations on the fixed plate to drive the gear to rotate and drive other fixed plates to move in their own predetermined directions.

[0101] Reference Fig.17 The gasket 313 is a cylinder as a whole, and its interior is a hollow cylinder. The inner wall of the hollow cylinder has serrations that can be used with the gear. The gasket is made of plastic as a whole. The height of each gasket cylinder is the thickness of a moving plate 303. The outer diameter of the gasket should not be too small. When only one pair of fixed plates is used, the gasket can keep the fixed plate balanced and tightly engaged with the gear. The outer diameter of the gasket is 18mm, the inner diameter is 6mm, and the height is 5mm.

[0102] Reference Fig.18, when the fixing claw and the frame back plate 102 are installed, when the external force pulls the fixing plate to move in the direction of the black thick arrow (i.e., moving away from the gear direction), the grooves and protrusions on the outer surface of the gear can be engaged with the serrations on the fixing plate to drive the gear to rotate in the direction of the black thin arrow. At the same time, if the device is equipped with more than one set of fixing plates, the other sets of fixing plates can be driven by the gear to move in the direction away from the gear. When the positioning protrusion 306 moves from the G end to the H end, all components stop moving. When the external force pushes the fixing plate to move in the opposite direction along the black thick arrow (i.e., moving close to the gear direction), the grooves and protrusions on the outer surface of the gear can be engaged with the serrations on the fixing plate to drive the gear to rotate in the opposite direction along the black thin arrow. At the same time, if the device is equipped with more than one set of fixing plates, the other sets of fixing plates can be driven by the gear to move in the direction close to the gear. When the positioning protrusion 306 moves from the H end to the G end, all components stop moving.

[0103] Using the above Example 2, refer to Fig.19 , take the SF6 gas density relay with a diameter of 100mm and a thickness of 80mm as an example to explain the usage:

[0104] S1. According to the appearance and size of the instrument to be calibrated, it is determined whether a fixing claw is required. According to the actual situation, it is necessary to determine the number of fixing plates m=2, the relative fixed position of the fixing plates on the back cover, the number of washers (nm)=(2-2)=0 and the position of the fixing claw installed on the frame back plate.

[0105] S2. How to use the frame and support blocks: First, place the selected frame on a horizontal and firm plane, and then place the selected pair of support blocks on the bottom plate of the frame.

[0106] S3. Fixing claw installation method: First, screw the fixing spine 309 on the back cover into the selected circular hole on the frame back plate 102, and fix the two with nuts. Then completely cover the gear on the outer surface of the central fixing column 308. Fig. 20 , according to the pre-selected number of fixed plates used m = 2 and their relative positions with the back cover, place each pair of fixed plates between the corresponding pairs of fixed protrusions 307 of the back cover in turn, and make the corresponding positioning protrusions 306 pass through the corresponding hollow rectangular card slots of the fixed plates. Before inserting the fixed plates, turn the gears appropriately to ensure that the serrations on the fixed plates can fully engage with the gears. Finally, align the central column 304 on the front cover with the central fixed column 308 on the back cover, and align the hollow fixed column 305 on the front cover with the corresponding fixed protrusions 307 on the back cover, use external force to combine the front cover and the back cover together, and finally fix the fixing claws to the frame back plate 102.

[0107] S4. How to install the instrument to be inspected on the fixed claw: refer to Fig.18, use external force to pull one of the pairs of fixing plates to move in the direction of the thick black arrow (i.e., moving away from the gear), and the grooves and protrusions on the outer surface of the gear engage with the serrations on the fixing plate to drive the gear to rotate in the direction of the thin black arrow. Other groups of fixing plates can also be driven by the gear to move in the direction away from the gear. When the positioning protrusion 306 moves from the G end to the H end, all components stop moving. At this time, place the meter head to be inspected within the range surrounded by the fixing claws. Use external force to push one of the pairs of fixing plates to move in the opposite direction along the thick black arrow (i.e., moving toward the gear). The grooves and protrusions on the outer surface of the gear engage with the serrations on the fixing plate to drive the gear to rotate in the opposite direction along the thin black arrow. Other groups of fixing plates can also be driven by the gear to move in the direction toward the gear. When the fixing claw completely and effectively wraps the edge of the meter to be inspected, stop pushing the fixing plate.

[0108] S5. Appropriately fine-tune the position of the support block so that the instrument to be inspected is firmly placed on the support block to meet the conditions required for instrument calibration.

[0109] S6. Connect the air inlet and wiring port and perform corresponding instrument inspection.

[0110] S7. After the instrument inspection is completed, fine-tune the position of the support block appropriately to ensure that there is space for the fixed claw to move while continuing to support the weight of the instrument to be inspected. Fig.18 , use external force to pull one pair of fixing plates to move in the direction of the thick black arrow (i.e., moving away from the gear), and the grooves and protrusions on the outer surface of the gear engage with the saw teeth on the fixing plate to drive the gear to rotate in the direction of the thin black arrow. At the same time, if the device is equipped with more than one set of fixing plates, the other sets of fixing plates can be driven by the gear to move away from the gear. When the positioning protrusion 306 moves to the H end, all components stop moving. Remove the instrument to be inspected.

[0111] S8. If the instrument calibration device is not needed in the short term, the fixing claws can be removed in the order of front cover, fixing plate, washer, gear, nut, and rear cover, and then the support block can be removed.

[0112] S9. If you need to calibrate instruments of other sizes, you can reassemble them in the order of 9, 1, 2, 3, 4, 5, 6, 7, 8 and use them.

[0113] The beneficial effects of the present invention are as follows: the present invention provides a calibration support device specially designed for the characteristics of SF6 gas density relays and a method for using the same. This calibration support device can adjust the number, size and installation position of its own fixing claws and the position of the support block according to the specific conditions of the appearance size, air inlet position and wiring position of the SF6 gas density relay to meet the requirements of long-term verticality and stability during the calibration of the SF6 gas density relay, and effectively avoid errors caused by human control, gas path blockage, and poor contact of electric shock signals. When not in use, it can be easily disassembled and stored, taking up less space and saving space. The whole is made of plastic, stainless steel and rubber, and is durable. Moreover, this instrument calibration support device can not only be used in the field of SF6 gas density relay calibration, but also can be widely used in other instrument calibration fields due to its strong adjustability. This instrument calibration support device is made of sturdy and durable materials and is simple to use, which can greatly improve work efficiency and reduce work costs.

[0114] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A SF6 gas density relay calibration support device, comprising a frame, a support block and a fixing claw, wherein the frame comprises a frame bottom plate and a frame back plate; the fixing claw comprises a fixing plate, a gasket, a front cover, a rear cover, a nut and a gear; the entire device is made of rubber, stainless steel and plastic materials; The frame is placed horizontally on a horizontal plane. The frame plays the role of auxiliary fixing and supporting, and is the frame of the entire device. The frame back plate is fixedly connected to the frame bottom plate. The frame back plate is in a rectangular shape and is made of stainless steel. A number of circular holes are evenly distributed on the back plate. The inner walls of the circular holes have internal threads, and the circular holes are connected to the fixing claws. The support block is placed on the frame, and the bottom of the support block is placed in contact with the frame; The fixing claw is connected to the frame, and the fixing claw is connected to the frame back plate through a front cover, a rear cover and a nut.

2. The SF6 gas density relay calibration support device according to claim 1, characterized in that: The frame bottom plate includes a first frame bottom plate, a second frame bottom plate and a third frame bottom plate, wherein the first frame bottom plate, the second frame bottom plate and the third frame bottom plate are respectively connected with a frame back plate, and the frame bottom plate can be selected according to actual conditions; The first frame bottom plate is in a rectangular shape, the upper layer of which is made of magnetic rubber material, and the lower layer is made of stainless steel material, and the upper layer is pasted on the lower layer for use; The second frame bottom plate is in a rectangular shape, with an upper layer made of a rough rubber material and a lower layer made of a stainless steel material, and the upper layer is pasted on the lower layer for use; The third type of frame bottom plate is in the shape of a rectangular block as a whole and is made of stainless steel. A rectangular groove is arranged from the left end to the right end of the frame bottom plate. There are trapezoidal grooves on the front and rear sides of the groove respectively passing through the left and right ends. The groove part of the entire frame bottom plate does not pass through the bottom surface of the bottom plate.

3. The SF6 gas density relay calibration support device according to claim 2, characterized in that: The support blocks include a first type of support block, a second type of support block and a third type of support block, and the first type of support block, the second type of support block and the third type of support block are used in conjunction with the first type of frame bottom plate, the second type of frame bottom plate and the third type of frame bottom plate respectively; The first type of support block includes an elastic rubber block, a stainless steel block, and a magnetic rubber block. The elastic rubber block, the stainless steel block, and the magnetic rubber block are sequentially pasted together into one piece. The contact surface between the elastic rubber block and the instrument to be tested is a slightly curved surface. The magnetic rubber block is used in conjunction with the upper magnetic rubber layer of the first frame bottom plate. Through the action of magnetic force, the first type of support block can be fixed at any position of the first frame bottom plate. The first type of support block is used in a group of two. The second type of support block includes an elastic rubber block, a stainless steel block, and a rough rubber block. The elastic rubber block, the stainless steel block, and the rough rubber block are sequentially pasted together. The contact surface between the elastic rubber block and the instrument to be tested is a slightly curved surface. The rough rubber block is used in conjunction with the upper rough rubber layer of the second frame bottom plate. By increasing the friction of the contact surface, the second type of support block can be fixed at any position of the second frame bottom plate. The second type of support blocks are used in groups of two. The third support block includes an elastic rubber block, a stainless steel block, a rough rubber block and a trapezoidal protrusion. The elastic rubber block, the stainless steel block and the rough rubber block are sequentially pasted together into one body. The contact surface between the elastic rubber block and the instrument to be tested is a slightly curved arc surface. The trapezoidal protrusion is composed of a stainless steel part and a rough rubber sheet pasted thereunder, wherein the stainless steel part of the trapezoidal protrusion and the stainless steel block are an integrally formed structure. The trapezoidal protrusion of the third support block is used in conjunction with the groove of the third frame bottom plate. The shape and size of the contact portion between the third support block and the third frame bottom plate match the shape and size of the rectangular groove and the trapezoidal groove of the third frame bottom plate, and an appropriate margin is left so that the support block can move along the groove of the frame bottom plate under the action of thrust. The function of the rough rubber block and the rough rubber sheet on the third support block is that when the support block is adjusted to a suitable position, the friction of the contact surface is increased so that the support block can be firmly fixed in a suitable position of the frame bottom plate. The third support block needs to be used in a group of two.

4. The SF6 gas density relay calibration support device according to claim 3, characterized in that: The fixing plate includes a plastic claw plate, a rubber claw plate and a moving plate. The plastic claw plate and the moving plate are both made of plastic and are an integrally formed structure. The rubber claw plate is made of rubber and is pasted on the inside of the plastic claw plate for use. The plastic claw plate is slightly curved. The moving plate has partial serrations and a hollow rectangular slot. The size of the serrations can be used in conjunction with gears.

5. The SF6 gas density relay calibration support device according to claim 4, characterized in that: The rear cover is a stainless steel part formed in one piece by a positioning protrusion, a fixing protrusion, a central fixing column, a fixing spine and a rear cover plate, and the rear cover plate is a round stainless steel plate; The positioning protrusion and the fixing protrusion are solid cylinders fixedly connected to the rear cover plate facing the front cover side. The specific number needs to be determined according to the size of the device and the size of the fixing plate. The positioning protrusion passes through the hollow rectangular card slot of the fixing plate when in use, and is used to limit the length of the fixing plate that can be extended and retracted. The fixing protrusion is used to fix the installation position of the fixing plate on the rear cover and the direction of extension and retraction on the rear cover. The central fixing column is a hollow cylinder fixedly connected to the rear cover plate facing the front cover side, and is located at the center point of the circular rear cover plate. The heights of the positioning protrusion, the fixing protrusion and the central fixing column are all n times the thickness of the moving sheet. The fixed spine is a solid cylinder with external threads on the surface, and is fixedly connected to the rear cover plate away from the front cover. The thread length of the fixed spine should be able to ensure that after rotating through the circular hole on the frame back plate and fully rotating and matching with the internal thread of the nut, there is still margin; The nut is made of stainless steel, and has an internal thread on its inner wall. The size of the internal thread matches the external thread of the fixed spine. The nut and the fixed spine are used together to fix the rear cover to a suitable round hole position of the frame back plate.

6. The SF6 gas density relay calibration support device according to claim 5, characterized in that: The front cover is an integrally formed stainless steel part consisting of a central column, a hollow fixed column and a front cover plate, and the height of the central column and the hollow fixed column are both n times the thickness of the moving plate; The center column is a solid cylinder that is fixedly connected to the side of the front cover plate facing the rear cover. It is located at the center point of the circular rear cover plate. Its size matches the hollow cylinder of the center fixing column and can be fully inserted into the center fixing column with appropriate margin for easy insertion and removal. The hollow fixing column is a hollow stainless steel cylinder fixedly connected to the front cover facing the rear cover side, and its size matches the solid cylinder of the fixing protrusion, so that the fixing protrusion can be fully inserted into the hollow fixing column with appropriate margin for easy plugging and unplugging; the front cover is a round stainless steel plate.

7. The SF6 gas density relay calibration support device according to claim 6, characterized in that: The gear is a cylinder with grooves and protrusions on its outer surface and a hollow cylinder inside; the gear is made of plastic, and the height of the gear cylinder is n times the thickness of the moving plate; the size of the hollow cylinder inside the gear matches the size of the outer cylinder of the central fixed column, and an appropriate margin is left to facilitate plugging and unplugging and rotation on the surface of the outer cylinder of the central fixed column, and the grooves and protrusions on the outer surface of the gear can be used in conjunction with the serrations on the fixing plate; after the device is assembled, when an external force pulls the fixing plate to move away from or close to the central fixed column, the grooves and protrusions on the outer surface of the gear can engage with the serrations on the fixing plate to drive the gear to rotate and drive other fixing plates to move in their own predetermined directions.

8. The SF6 gas density relay calibration support device according to claim 7, characterized in that: The washer is a cylinder as a whole, and its interior is a hollow cylinder. The inner wall of the hollow cylinder has serrations that can be used in conjunction with the gear. The washer is made of plastic as a whole. The height of each washer's overall cylinder is the thickness of a moving plate. The outer diameter of the washer should not be too small. When only a pair of fixed plates are used, the washer can keep the fixed plates balanced and tightly engaged with the gears.

9. The SF6 gas density relay calibration support device according to claim 8, characterized in that: When the fixing claw and the frame back plate are installed, when external force pulls the fixing plate to move away from the gear, the gear can be driven to rotate by the grooves and protrusions on the outer surface of the gear engaging with the serrations on the fixing plate. At the same time, if the device is installed with more than one set of fixing plates, other groups of fixing plates can be driven by the gear to move in the direction away from the gear. When the locking protrusion moves from one side of the rectangular slot of the fixing plate to the other side, all components stop moving; when external force pushes the fixing plate to move towards the gear, the same principle applies.

10. The SF6 gas density relay calibration support device according to claim 9, characterized in that: The method of using the above SF6 gas density relay verification support device to verify the SF6 gas density relay is as follows: S1. Determine whether to use fixing claws based on the appearance, shape and size of the instrument to be calibrated. If only the frame and the support block are needed to firmly fix the instrument to be calibrated and the instrument calibration requirements are met, fixing claws may not be used. If fixing claws are needed, the number of fixing pieces m, the relative fixed position of the fixing pieces on the back cover, the number of washers and the position of the fixing claws installed on the frame back plate need to be determined based on actual conditions; S2. Select the type of frame and support block according to the functional characteristics of the instrument to be calibrated. When the magnetic field affects the instrument calibration result, it is recommended to use the second frame and the second support block, or the third frame and the third support block. When the instrument calibration requires a pair of support blocks to be placed in a non-straight line, it is recommended to use the first frame and the first support block, or the second frame and the second support block. S3. How to use the frame and support blocks: First, place the selected frame on a horizontal and firm plane, and then place the selected pair of support blocks on the frame bottom plate; if the first and second support blocks are selected, they can be placed directly in the selected position; if the third frame and the third support block combination is used, it is necessary to align the trapezoidal protrusions of a pair of support blocks with the grooves of the frame bottom plate, and manually slide the pair of support blocks along the grooves to the pre-selected positions; if the instrument calibration requirements are met without the use of fixed claws, the instrument to be calibrated can be directly placed on the support block, and the position of the support block can be fine-tuned. After confirming that the instrument to be calibrated has been firmly placed, the relevant calibration work can be carried out; S4. If you need to use fixing claws to assist in fixing the instrument to be inspected, you need to follow the following method for installing the fixing claws: first, screw the fixing spine on the back cover into the selected circular hole on the frame back plate, and fix the two with a nut; then completely cover the gear on the outer surface of the central fixing column; then completely cover the washer on the outer surface of the gear, and ensure that it fully engages with the gear; next, according to the pre-selected number of fixed plates used, m, and its relative position with the back cover, place each pair of fixing plates between the corresponding pairs of fixing protrusions on the back cover in turn, and make the corresponding position of the positioning protrusions pass through the corresponding hollow rectangular slots of the fixing plates; before inserting the fixing plates, rotate the gears appropriately to ensure that the serrations on the fixing plates can fully engage with the gears; finally, align the central column on the front cover with the central fixing column on the back cover, and align the hollow fixing column on the front cover with the corresponding fixing protrusion on the back cover, use external force to combine the front cover and the back cover together, and finally fix the fixing claws to the frame back plate; S5. Method for installing the instrument to be inspected on the fixed claw: when one of the pairs of fixed plates is pulled by external force to move in the direction away from the gear, the gear is driven to rotate by the grooves and protrusions on the outer surface of the gear engaging with the serrations on the fixed plate. At the same time, if the device is installed with more than one set of fixed plates, the other groups of fixed plates can be driven by the gear to move in the direction away from the gear. When the positioning protrusion moves from one side of the rectangular slot of the fixed plate to the other side, the movement of all components stops; at this time, place the meter head to be inspected within the range surrounded by the fixed claw; use external force to push one of the pairs of fixed plates to move in the direction close to the gear, and the gear is driven to rotate in the opposite direction by the grooves and protrusions on the outer surface of the gear engaging with the serrations on the fixed plate. At the same time, if the device is installed with more than one set of fixed plates, the other groups of fixed plates can be driven by the gear to move in the direction close to the gear. When the fixed claw completely and effectively wraps the edge of the instrument to be inspected, stop pushing the fixed plate; S6. Appropriately fine-tune the position of the support block so that the instrument to be inspected is firmly placed on the support block to meet the instrument calibration requirements; S7. Carry out relevant instrument inspection work; S8. After the instrument inspection is completed, fine-tune the position of the support block appropriately to ensure that there is space for the fixed claw to move while continuing to support the weight of the instrument to be inspected; use external force to pull one pair of fixed plates to move in the direction away from the gear, and the grooves and protrusions on the outer surface of the gear engage with the serrations on the fixed plate to drive the gear to rotate. At the same time, if the device is equipped with more than one set of fixed plates, the other groups of fixed plates can be driven by the gear to move in the direction away from the gear. When the positioning protrusion moves from one side of the rectangular slot of the fixed plate to the other side, all components stop moving, and the instrument to be inspected is removed; S9. If the instrument calibration device is not needed in the short term, the fixing claws can be removed in the order of front cover, fixing plate, washer, gear, nut, and rear cover, and then the support block can be removed; S10. If you need to calibrate instruments of other sizes, you can reassemble them in the order of S9, S1, S2, S3, S4, S5, S6, S7, and S8 and use them.

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