A multi-parameter comprehensive detection device for switch cabinet handcart circuit breaker torx contact

Abstract

This invention discloses a multi-parameter integrated testing device for the plum blossom contacts of a switchgear trolley circuit breaker, relating to the field of electrical contact performance testing technology for switchgear trolley contacts. The device includes a testing body; a testing mechanism comprising a testing arm for determining positional deviation by fitting it with the plum blossom contact; a guiding and flexible floating mechanism disposed on one side of the testing body for accurately locating the offset contact and the deviation value between the contact and the testing arm; and a fitting offset calculation mechanism disposed at one end of the guiding and flexible floating mechanism, which includes a pointer for detecting minute angular deviations when the contact and testing arm are fitted together by the moving pointer. The device moves a movable plate, causing the pointer to move smoothly on the scale surface. A miniature magnifying glass located directly above the pointer also moves accordingly. By observing the position of the pointer, the distance of the plum blossom contact offset can be detected.

Description

Technical Field

[0001] This invention relates to the field of electrical contact performance testing technology for switchgear trolley contacts, specifically a multi-parameter comprehensive testing device for the plum blossom contacts of switchgear trolley circuit breakers. Background Technology

[0002] The electrical contact performance of switchgear trolley contacts is one of the key factors in ensuring the stable operation of the power system. The pentagonal contact is a common contact type in high-voltage switchgear, often used at the connection points between the circuit breaker trolley and the stationary contact. The contact area between the pentagonal contact and the stationary contact finger is one of the most prone to overheating in high-voltage switchgear during operation. The main reason for overheating is that the contact performance parameters between the pentagonal contact and the stationary contact finger do not meet the technical requirements. As one of the key pieces of equipment in the power system, the stability and safety of the switchgear's performance directly affect the stable operation of the entire power grid. With the accelerated construction of smart grids and new power systems, the performance requirements for switchgear will become increasingly stringent. Pentagonal contact insertion depth testing requires the trolley to be in the working position. A newly developed testing fixture is installed at the front end of the pentagonal contact. The pentagonal contact and the testing fixture are isolated by an insulating gasket. The test leads on the testing fixture are connected to the test end, and the other end of the test lead is connected to the pentagonal contact.

[0003] Initially, the testing of the electrical contact performance of switchgear trolley contacts mainly relied on traditional testing methods, such as using measuring tools and manual observation. While these methods could reflect the contact state of the contacts to some extent, they suffered from low testing efficiency and insufficient accuracy. Meanwhile, patent CN107490329A disclosed a trolley-type switchgear contact position inspection trolley. Although it simulated engagement between the inspection arm on the trolley and the contacts on the switchgear to check whether the contact position matched the design dimensions, if there was a certain deviation between the contact position and the design position, the inspection arm on the contact inspection trolley could not fit into the contacts on the switchgear. At this point, the position of the contacts on the switchgear needs to be adjusted according to the inspection results. However, this process can only determine whether the contacts are properly fitted, which is a qualitative test and cannot effectively detect which contact is misaligned or the deviation value of the contacts. Subsequently, maintenance personnel need to continuously adjust the position of the contacts to match the contact arm. This process consumes a lot of time. Moreover, when the contacts are fitted to the contact arm, under a slight angular deviation, the contacts are not inserted in parallel, but one side contacts first and bears huge pressure, which will produce a serious ploughing effect, scratching deep marks on the silver plating layer and destroying the excellent conductivity of the surface. When there are slight scratches and burrs on the contact surface, relying solely on the eyesight and experience of maintenance personnel is prone to subjective judgment and missed detection. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-parameter integrated testing device for the plum blossom contacts of a switchgear circuit breaker, in order to solve the problem mentioned in the background art where, when the contacts and contact arms are fitted together, even with a slight angular deviation, the contacts are not inserted in parallel, but rather one side contacts first and bears enormous pressure, which will produce a severe ploughing effect, scratching deep marks on the silver plating layer and destroying the excellent conductivity of the surface.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a multi-parameter integrated detection device for the plum blossom contacts of a switchgear trolley circuit breaker, comprising; The main body of the detection device; The detection mechanism includes a detection arm for determining positional deviation by fitting it with a plum blossom contact. A guiding and flexible floating mechanism is set on one side of the detection device body to accurately locate the offset contact and the deviation value between the contact and the contact arm; The nested offset calculation mechanism is set at one end of the guide and flexible floating mechanism. The nested offset calculation mechanism is equipped with a pointer, which is used to detect the small angular deviation between the contact and the detection contact arm when the pointer is nested by moving around. The nested smoothness surveying mechanism is set on one side of the nested offset calculation mechanism and is used to analyze the acoustic signature to determine the smooth curve of the detection contact arm and the plum blossom contact.

[0006] Preferably, the guiding and flexible floating mechanism includes multiple guide rods, multiple guide plates, multiple floating grooves, multiple floating blocks, multiple auxiliary blocks, multiple auxiliary shafts, multiple first flexible hinges, multiple extension plates, multiple flexible platforms, multiple two-dimensional force sensors, multiple positioning plates, multiple L-shaped plates, multiple displacement plates, multiple passive plates, and multiple second flexible hinges.

[0007] Preferably, one side of each of the multiple guide plates is fixedly connected to one end of each of the multiple guide rods, and the multiple two-dimensional force sensors are respectively disposed on the back of the multiple flexible platforms to accurately measure the direction of the offset and the magnitude of the force.

[0008] Preferably, the positioning plate is connected to the first flexible hinge via an extension plate, and one side of the flexible platform is connected to the displacement plate via a second flexible hinge and a passive plate, so that the clover-shaped contact for adaptive offset is fitted into the detection contact arm.

[0009] Preferably, the sleeve-type offset calculation mechanism includes multiple restraint sleeves, multiple restraint plates, multiple movable slots, multiple movable plates, multiple pointers, multiple scale values, multiple U-shaped plates, and multiple miniature magnifying glasses.

[0010] Preferably, the minute angle value of the offset of the fitted plum blossom contact can be measured by the position of the pointer moving on the scale value surface.

[0011] Preferably, the sleeve-type smoothness surveying mechanism includes multiple fitting sleeves, multiple surveying cylinders, multiple telescopic rods, multiple abutment rollers, multiple acoustic sensors, and multiple return springs.

[0012] Preferably, when the inclined plum blossom contact is inserted into the detection contact arm, the inclined surface is pressed against the contacting roller, and the acoustic sensor generates specific high-frequency vibrations and abnormal noises to detect that the insertion of the detection contact arm and the plum blossom contact is not smooth enough.

[0013] Preferably, the micro magnifying glass is located directly above the pointer to magnify the value when the scale value is in contact with the pointer.

[0014] Preferably, the bottom of the detection device body is provided with a support base, and a plurality of detection strips are provided on one side of the detection device body. The detection mechanism also includes a plurality of reinforcing washers, a plurality of reinforcing sleeves and a plurality of extension cylinders.

[0015] Compared with the prior art, the beneficial effects of the present invention are: In this invention, after the large-angle offset plum blossom contact head comes into contact with the detection arm, the tilted corner applies pressure to the detection arm, which in turn transmits the force to the flexible platform. Two floating blocks slide inside the floating groove. Under the connection of the first flexible hinge, the flexible platform is driven to swing in a circular motion, so that the flexible platform can adapt to the angle of the plum blossom contact head. By using the detection arm and the plum blossom contact head to fit together, the two-dimensional force sensor can accurately measure the direction and magnitude of the plum blossom contact head offset, realizing the quantification from whether it can enter to how much it is offset and in which direction to adjust, thus improving the adjustment efficiency and accuracy. When there is a slight angular deviation of the plum blossom contact head fitted into the detection arm, its tilted surface will apply pressure to the abutment roller. During its movement, it drives the movable plate to move, and the pointer moves smoothly on the surface of the scale value. The micro magnifying glass located directly above the pointer will also move along with it. By the position of the pointer movement, the distance of the plum blossom contact head offset can be detected.

[0016] In this invention, a miniature magnifying glass can magnify the measured values. After magnification, the data points are dispersed, allowing for more accurate cursor positioning and value reading, making the interface clearer. Under the guidance of the adaptive mechanism, the detection arm drives the sleeve-type smoothness surveying mechanism to contact the plum blossom contact. The sound of normal smooth sleeve-in is continuous. When scratching, bumping, or bouncing occurs, specific high-frequency vibrations and abnormal noises are generated. Through acoustic analysis, microscopic deformations and burrs that are difficult to see with the naked eye can be detected very sensitively. Multiple detection arms are equipped with acoustic sensors. Through comparative analysis, it can be immediately determined which contact point between the detection arm and the plum blossom contact originates from. The acoustic sensors are directly installed on each abutment roller, making them closest to their respective friction sound sources. The guiding and flexible floating mechanism itself has compliance and can actively fine-tune the contact posture after detecting a small deviation, guiding the plum blossom contact to smoothly sleeve in. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main view of the multi-parameter integrated detection device for the plum blossom contact of a switchgear trolley circuit breaker according to the present invention; Figure 2 This is a side view of the main body of the multi-parameter integrated detection device for the plum blossom contact of a switchgear trolley circuit breaker according to the present invention. Figure 3 This is a schematic diagram of the guiding and flexible floating mechanism in the multi-parameter integrated detection device for the plum blossom contacts of a switchgear trolley circuit breaker according to the present invention; Figure 4 This is a side view sectional view of the guiding and flexible floating mechanism in the multi-parameter integrated detection device for the plum blossom contact of a switchgear trolley circuit breaker according to the present invention. Figure 5 This is a partial exploded view of a multi-parameter integrated detection device for the plum blossom contacts of a switchgear trolley circuit breaker according to the present invention. Figure 6 This is a schematic diagram of the nested offset calculation mechanism in the multi-parameter integrated detection device for the plum blossom contacts of a switchgear trolley circuit breaker according to the present invention; Figure 7 This is a partial side view of the multi-parameter integrated detection device for the plum blossom contacts of a switchgear trolley circuit breaker according to the present invention. Figure 8 This is a schematic diagram of the installation structure of the second universal ball joint in the multi-parameter integrated detection device for the plum blossom contact of a switchgear trolley circuit breaker of the present invention; Figure 9 This is a schematic diagram of the structure of the nested smoothness surveying mechanism in the multi-parameter integrated detection device for the plum blossom contacts of a switchgear trolley circuit breaker of the present invention.

[0018] In the diagram: 100, Detection device body; 200, Support base; 300, Detection strip; 411, Reinforcing washer; 412, Reinforcing sleeve; 413, Extension cylinder; 414, Detection contact arm; 1, Guiding and flexible floating mechanism; 101, Guide rod; 102, Guide plate; 103, Floating groove; 104, Floating block; 105, Auxiliary block; 106, Auxiliary shaft; 107, First flexible hinge; 108, Extension plate; 109, Flexible platform; 110, Two-dimensional force sensor; 111, Positioning plate; 11 2. L-shaped plate; 113. Displacement plate; 114. Passive plate; 115. Second flexible hinge; 2. Sleeve-type offset calculation mechanism; 201. Restraint sleeve; 202. Restraint plate; 203. Movable groove; 204. Movable plate; 205. Pointer; 206. Scale value; 207. U-shaped plate; 208. Miniature magnifying glass; 3. Sleeve-type smoothness surveying mechanism; 301. Fitting sleeve; 302. Surveying cylinder; 303. Telescopic rod; 304. Abutment roller; 305. Acoustic sensor; 306. Return spring. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] To address the problem in existing multi-parameter integrated testing devices for the pentagonal contacts of switchgear circuit breakers that, during operation, even slight angular deviations during contact and contact arm insertion result in the contacts not being inserted parallel but rather one side contacting first and bearing enormous pressure, leading to a severe ploughing effect that scratches deep marks on the silver plating and damages the surface's excellent conductivity, this invention provides a multi-parameter integrated testing device for the pentagonal contacts of switchgear circuit breakers. (Refer to...) Figure 1 As shown: including: Detection device body 100; The testing mechanism includes a testing arm 414, which is used to determine positional deviation by fitting it with a plum blossom contact. The guiding and flexible floating mechanism 1 is set on one side of the detection device body 100 and is used to accurately locate the offset contact and the deviation value between the contact and the contact arm. The nested offset calculation mechanism 2 is set at one end of the guide and flexible floating mechanism 1. The nested offset calculation mechanism 2 is equipped with a pointer 205, which is used to detect the small angular deviation between the contact and the detection contact arm 414 when they are nested by the pointer 205 that moves around. The nested smoothness surveying mechanism 3 is set on one side of the nested offset calculation mechanism 2 and is used to analyze the smooth curve of the detection contact arm 414 and the plum blossom contact through acoustic analysis.

[0021] This structure simulates the actual operating state of a circuit breaker trolley being pushed out. By checking the simulated engagement between the detection arm 414 on the trolley and the contacts on the switchgear, the system verifies whether the contact positions match the design dimensions. Since there are multiple pentagonal contacts on the switchgear, multiple detection arms 414 are needed to accommodate them. Each detection arm 414 is positioned on one side of the detection device body 100. By simply moving the detection device body 100, the distance between the multiple detection arms 414 and the pentagonal contacts can be adjusted. When a pentagonal contact with a large-angle offset contacts the detection arm 414, the tilted corner will... Applying pressure, the force is then transmitted to the flexible platform 109. The two floating blocks 104 slide inside the floating groove 103. Under the connection of the first flexible hinge 107, they drive the flexible platform 109 to swing circumferentially, thereby enabling the flexible platform 109 to adapt to the angle of the plum blossom contact. By using the detection arm 414 to fit with the plum blossom contact, the two-dimensional force sensor 110 can accurately measure the direction and magnitude of the plum blossom contact offset, realizing the quantification from whether it can enter, how much it deviates, and in which direction to adjust, improving adjustment efficiency and accuracy. When the plum blossom contact fitted into the detection arm 414 has a slight angular deviation, its tilted surface will press against the abutment roller. Pressure is applied to 304, causing the movable plate 204 to move during its movement. The pointer 205 moves smoothly across the scale value 206. The micro-magnifying glass 208, located directly above the pointer 205, also moves accordingly. By observing the position of the pointer 205, the distance of the plum blossom contact offset can be detected. Even within a generally stable data curve, subtle fluctuations and burrs can be detected. The micro-magnifying glass 208 magnifies the measured values, causing the data points to spread out, allowing for more accurate cursor positioning and value reading, resulting in a clearer interface. Guided by the adaptive mechanism, the detection arm 414 moves... The smoothness detection mechanism 3 is in contact with the plum blossom contact. When the two are smoothly fitted together, the sound is continuous. When scratching, bumping, or bouncing occurs, specific high-frequency vibrations and abnormal noises will be generated. Through acoustic analysis, microscopic deformations and burrs that are difficult to see with the naked eye can be detected very sensitively. Multiple detection arms 414 are equipped with acoustic sensors 305. Through comparative analysis, it can be immediately determined which contact arm and the plum blossom contact point the abnormal noise comes from. The acoustic sensors 305 are directly installed on each abutment roller 304, so that they are closest to their respective friction sound sources, and the clearest and most original audio signals can be collected, which greatly improves the detection sensitivity.

[0022] Preferred, according to Figure 2As shown, one end of each of the multiple detection strips 300 is fixedly connected to one side of the detection device body 100, as indicated in the attached instruction manual. Figure 2 This indicates that there is no angular deviation between the plum blossom contact and the detection arm 414. Refer to the attached instruction manual. Figure 8 It can be seen that this state is due to an angular deviation between the plum blossom contact and the detection contact arm 414.

[0023] It should be noted that the guiding and flexible floating mechanism 1 itself has compliance and can actively fine-tune the contact posture after detecting a small deviation, guiding the plum blossom contact to be smoothly fitted.

[0024] Preferably, the specific working process of the guiding and flexible floating mechanism 1 is as follows: Figure 3 As shown, the guiding and flexible floating mechanism 1 includes multiple guide rods 101, multiple guide plates 102, multiple floating grooves 103, multiple floating blocks 104, multiple auxiliary blocks 105, multiple auxiliary shafts 106, multiple first flexible hinges 107, multiple extension plates 108, multiple flexible platforms 109, multiple two-dimensional force sensors 110, multiple positioning plates 111, multiple L-shaped plates 112, multiple displacement plates 113, multiple passive plates 114, and multiple second flexible hinges 115.

[0025] Multiple detection strips 300 are each fixedly mounted with a guide rod 101 at one end, and a guide plate 102 is fixedly mounted at one end of each guide rod 101. Each guide plate 102 has a floating groove 103 on one side. Two floating blocks 104 are slidably installed inside each floating groove 103. Two auxiliary blocks 105 are fixedly mounted on one side of each floating block 104. An auxiliary shaft 106 is movably interlocked between adjacent auxiliary blocks 105. First flexible hinges 107 are movably hinged to the outside of each auxiliary shaft 106. An extension plate 108 is fixedly mounted on one side of each first flexible hinge 107. Multiple flexible platforms 1... Positioning plates 111 are fixedly installed on both sides of 09. One side of the multiple positioning plates 111 is movably hinged to one side of the multiple extension plates 108. Multiple two-dimensional force sensors 110 are fixedly installed on one side of the multiple flexible platforms 109. L-shaped plates 112 are fixedly installed on the other side of the multiple guide plates 102. Displacement plates 113 are movably installed on one side of the multiple L-shaped plates 112. Passive plates 114 are movably hinged to one side of the multiple displacement plates 113. Second flexible hinges 115 are movably hinged to one side of the multiple passive plates 114. One side of the multiple second flexible hinges 115 is movably hinged to one side of the multiple flexible platforms 109.

[0026] The flexible platform 109 is a rigid table, but its support includes a first flexible hinge 107 and a second flexible hinge 115. When a force is applied in a specific direction, the flexible hinge will undergo controllable elastic bending, thereby causing the flexible platform 109 to produce slight pitch and roll angle swings. After the large-angle offset pendulum contact with the detection arm 414, the tilted corner will apply pressure to the detection arm 414, and then transmit the force to the flexible platform 109. The two floating blocks 104 will slide inside the floating groove 103. Under the connection of the first flexible hinge 107, they will drive the flexible platform 109 to swing in a circle, so that the flexible platform 109 can adapt to the angle of the pendulum contact. By using the detection arm 414 to fit with the pendulum contact, the two-dimensional force sensor 110 can accurately measure the direction and magnitude of the pendulum contact offset, realizing the quantification from whether it can enter to how much it is offset and in which direction to adjust, improving adjustment efficiency and accuracy.

[0027] Furthermore, such as Figure 4 As shown, one side of each of the multiple guide plates 102 is fixedly connected to one end of each of the multiple guide rods 101, and multiple two-dimensional force sensors 110 are respectively installed on the back of the multiple flexible platforms 109 to accurately measure the direction of the offset and the magnitude of the force.

[0028] During the fitting process, the adaptive detection arm 414 simulates the forces and movements of real assembly. It can actively sense and record the adjustment angle and force required to overcome minor misalignment. The two-dimensional force sensor 110 is integrated behind the flexible platform 109 and can calculate the angle and force that need to be adjusted.

[0029] Preferred, according to Figure 5 As shown, the positioning plate 111 is connected to the first flexible hinge 107 via an extension plate 108, and one side of the flexible platform 109 is connected to the displacement plate 113 via a second flexible hinge 115 and a passive plate 114. The plum blossom contact for adaptive offset is fitted into the detection contact arm 414. A support base 200 is provided at the bottom of the detection device body 100, and multiple detection strips 300 are provided on one side of the detection device body 100. The detection mechanism also includes multiple reinforcing washers 411, multiple reinforcing sleeves 412, and multiple extension cylinders 413.

[0030] One side of the reinforcing washer 411 is fixedly connected to one side of the flexible platform 109, one end of the reinforcing sleeve 412 is fixedly connected to the other side of the reinforcing washer 411, one end of the extension cylinder 413 is fixedly connected to the other end of the reinforcing sleeve 412, and one end of the detection arm 414 is fixedly connected to the other end of the extension cylinder 413.

[0031] The reinforcing sleeve 412 and the extension sleeve 413 mainly support one side of the detection arm 414. The opening of the detection arm 414 is fitted into the plum blossom contact. The inclined plum blossom contact will apply a force to the detection arm 414. The force is mutual and will be transmitted to the reinforcing sleeve 412. With the connection of the reinforcing washer 411, the flexible platform 109 can be driven to tilt and swing.

[0032] Preferably, the specific working process of the nested offset calculation mechanism 2 is as follows: according to Figure 6 As shown, the nested offset calculation mechanism 2 includes multiple binding sleeves 201, multiple binding plates 202, multiple movable slots 203, multiple movable plates 204, multiple pointers 205, multiple scale values ​​206, multiple U-shaped plates 207, and multiple miniature magnifying glasses 208.

[0033] Multiple restraint sleeves 201 are fixedly fitted to one end of the extension tube 413, and one side of multiple restraint plates 202 are fixedly connected to the outer wall of the restraint sleeves 201. Multiple movable grooves 203 are respectively opened on one side of the multiple restraint plates 202. Movable plates 204 are movably installed inside the multiple movable grooves 203. Pointers 205 are fixedly installed on the top of the multiple movable plates 204. U-shaped plates 207 are fixedly installed on one side of the multiple pointers 205. Miniature magnifying glasses 208 are fixedly installed on the top of the multiple U-shaped plates 207. Scale values ​​206 are opened on the top of the multiple movable grooves 203.

[0034] Multiple abutment rollers 304 are originally circumferentially distributed inside the detection arm 414. Even if the plum blossom contact can be smoothly inserted into the detection arm 414, there will still be a slight angular deviation at the end of the plum blossom contact, that is, it will not be centered inside the detection arm 414. At this time, as the plum blossom contact is gradually inserted into the detection arm 414, the offset part of the plum blossom contact gradually approaches the abutment roller 304 and is squeezed against the arc-shaped tangent of the abutment roller 304. Under the transmission of the sleeve-type smoothness measuring mechanism 3, the movable plate 204 is driven to move inside the movable groove 203. The bottom surface of the pointer 205 moves smoothly on the surface of the scale value 206, which can quickly calculate the distance of the plum blossom contact offset. The micro magnifying glass 208 is located directly above the pointer 205 and can magnify the pointing situation of the pointer 205 and the scale value 206.

[0035] By magnifying the values ​​with the miniature magnifying glass 208, inspectors can clearly determine the distance of the plum blossom contact offset, solving the problem that inspectors' vision becomes blurred due to fatigue during long hours of work and making it difficult to see the values, thus reducing the risk of misreading or missing values.

[0036] like Figure 7As shown, when the detection arm 414 contacts the offset plum blossom contact, pressure is applied to the movable plate 204, and the minute angle value of the offset of the fitted plum blossom contact can be measured by the position of the pointer 205 on the surface of the scale value 206.

[0037] like Figure 8 As shown, the miniature magnifying glass 208 is located directly above the pointer 205 and is used to magnify the value when the scale value 206 is in contact with the pointer 205.

[0038] Preferably, the specific working process of the nested smoothness surveying mechanism 3 is as follows: Figure 9 As shown, the sleeve-type smoothness surveying mechanism 3 includes multiple fitting sleeves 301, multiple surveying cylinders 302, multiple telescopic rods 303, multiple abutment rollers 304, multiple acoustic sensors 305, and multiple return springs 306.

[0039] Multiple abutment rollers 304 are located inside the detection contact arm 414 and are originally symmetrically distributed in a circle. When the inclined plum blossom contact is inserted into the detection contact arm 414, the inclined surface is pressed against the contacting abutment rollers 304. Under the action of the return spring 306, the telescopic rod 303 moves inside the survey cylinder 302, which can transmit force to the movable plate 204. The acoustic sensor 305 generates specific high-frequency vibration and abnormal noise to detect that the insertion of the detection contact arm 414 and the plum blossom contact is not smooth enough.

[0040] It should be noted that the acoustic sensor 305 is a wireless sensor module with a built-in battery. A rubber pad is added between the acoustic sensor 305 and the detection arm 414 to reduce the vibration transmitted by the structure and prevent adjacent sensors from receiving the sound generated by the neighboring detection arm 414. The closer the acoustic sensor 305 is to the clover contact, the stronger the effective signal received and the less interference from environmental noise.

[0041] The acoustic sensor 305 converts the conditioned analog signal into a digital signal that can be processed by a computer through a controller with a built-in ADC, and then displays the acoustic pattern in real time through a human-machine interface.

[0042] Multiple detection arms 414 have arc-shaped grooves on their outer surfaces. Each arc-shaped groove has a sliding fitting sleeve 301 installed inside it. Each fitting sleeve 301 has a surveying cylinder 302 inserted through one end. Each surveying cylinder 302 has a telescopic rod 303 movably inserted through one end. Each telescopic rod 303 has a contact roller 304 fixedly installed at one end. Each contact roller 304 has an acoustic sensor 305 fixedly installed on one side. Each telescopic rod 303 has a return spring 306 wound around its outer surface. Each return spring 306 is located inside the surveying cylinder 302. Each telescopic rod 303 has one end fixedly connected to one side of each movable plate 204.

[0043] Because there is a certain gap between the detection arm 414 and the plum blossom contact, even when the plum blossom contact has a slight tilting deformation, it can still smoothly fit into the detection arm 414. Therefore, the tilt angle of that part cannot be accurately detected. When the plum blossom contact is not centered, its tilted side will press against the corresponding abutment rollers 304 installed around it. The abutment rollers 304 transmit force to the telescopic rod 303. With the connection of the return spring 306, the telescopic rod 303 can then move inside the survey cylinder 302. This will push the movable plate 204 to move, which in turn will cause the pointer 205 to move on the surface of the scale value 206, thereby detecting the specific direction and distance of the offset. With the centrally fitted plum blossom contact, multiple pointers 205 remain in their original positions. The acoustic sensor 305 is rigidly mounted on the surface of the abutment roller 304 via a magnetic base, and can directly sense the minute vibrations of the contact arm structure. When the plum blossom contact is fitted, any scratching, collision, or friction between the plum blossom contact and the inner surface of the detection contact arm 414 will cause the abutment roller to... The mechanical vibration wave of 304 is transmitted to the sensor through the structure, compressing the piezoelectric element and outputting an analog voltage signal proportional to the vibration acceleration. The acoustic sensor 305 contains a vibrating diaphragm and a back electrode plate, forming a miniature capacitor. The acoustic pressure causes the diaphragm to vibrate, changing the distance between the two electrodes of the capacitor, thereby changing the capacitance. The appearance of continuous, high-frequency, and regular frictional vibration indicates that scraping has occurred. The appearance of instantaneous, broadband, and high-energy impact vibration indicates that there is a collision between the plum blossom contact and the detection contact arm 414. The collision is manifested in the waveform as a sudden, high-amplitude spike, which may be followed by decaying oscillations. The waveform of a smooth fit is low-amplitude and stable. Based on this phenomenon, it can be determined whether the plum blossom contact is parallel and smoothly fitted inside the detection contact arm 414. If only the sensor of the abutment roller 304 detects a high-frequency abnormality, it is because the contact is scraped in that area. If multiple acoustic sensors 305 detect broadband impact at the same time, it is because of overall misalignment leading to a collision.

[0044] Working Principle: The electrical contact performance of the switchgear trolley contacts is one of the key factors ensuring the stable operation of the power system. The pentagonal contact is a common contact type in high-voltage switchgear, often used at the connection points between the circuit breaker trolley and the stationary contacts in circuit breaker and isolating trolleys. The contact area between the pentagonal contact and the stationary contact finger is one of the most prone to overheating in high-voltage switchgear during operation. The main reason for overheating is that the contact performance parameters between the pentagonal contact and the stationary contact finger do not meet technical requirements. As one of the key pieces of equipment in the power system, the stability and safety of the switchgear directly affect the stable operation of the entire power grid. With the accelerated construction of smart grids and new power systems, the performance requirements for switchgear will become increasingly stringent. Pentagram contact insertion depth detection requires the trolley to be in the working position. The test is conducted in a neutral state using a newly developed testing fixture installed at the front end of the plum blossom contact. An insulating gasket isolates the plum blossom contact from the test fixture. Test leads on the fixture are connected to the test end, and the other end of the test lead is connected to the plum blossom contact. Initially, the testing of the electrical contact performance of switchgear trolley contacts relied mainly on traditional methods, such as using measuring tools and manual observation. While these methods can reflect the contact state to some extent, they suffer from low efficiency and insufficient accuracy. Meanwhile, patent CN107490329A discloses a trolley-type switchgear contact position inspection trolley. Although it simulates engagement between the inspection arm on the trolley and the contacts on the switchgear, checking the contact position is... If the contact position deviates from the design dimensions, and the testing arm on the contact inspection trolley cannot fit into the contact on the switchgear, the contact position on the switchgear needs to be adjusted based on the inspection results. However, this process can only determine whether it fits, which is a qualitative test and cannot effectively detect which contact is misaligned or the deviation value. Maintenance personnel need to continuously adjust the contact position to match the contact arm, which consumes a lot of time. Furthermore, when fitting the contact and contact arm, even a slight angular deviation can cause the contact to not be inserted parallel, but rather one side to contact first and bear enormous pressure, resulting in a severe ploughing effect. This scratches deep into the silver plating, damaging the excellent conductivity of the surface, and causing slight scratches and burrs on the contact surface. During inspection, relying solely on the eyesight and experience of maintenance personnel can easily lead to subjective bias and missed detections. This structure simulates the actual operating state of the circuit breaker trolley being pushed out. By checking the engagement between the detection contact arm 414 on the trolley and the contacts on the switchgear, the system verifies whether the contact positions match the design dimensions. Since there are multiple pentagonal contacts on the switchgear, multiple detection contact arms 414 are required to be fitted around them. Each detection contact arm 414 is positioned on one side of the detection device body 100. The distance between the multiple detection contact arms 414 and the pentagonal contacts can be adjusted simply by moving the detection device body 100. The flexible platform 109 is a rigid table, but its support includes a first flexible hinge 107 and a second flexible hinge 115. When a force is applied in a specific direction...The flexible hinge undergoes controllable elastic bending, causing the flexible platform 109 to oscillate slightly in pitch and roll. When the large-angle offset of the plum blossom contact comes into contact with the detection arm 414, the tilted corner applies pressure to the detection arm 414, which in turn transmits the force to the flexible platform 109. The two floating blocks 104 slide within the floating groove 103, and under the connection of the first flexible hinge 107, they cause the flexible platform 109 to oscillate in a circular motion, allowing the flexible platform 109 to adapt to the angle of the plum blossom contact. By using the detection arm 414 to interlock with the plum blossom contact, the two-dimensional force sensor 110 can accurately measure the direction and angle of the plum blossom contact's offset. The magnitude of the force quantifies whether it can enter the device, how much it can deviate, and in which direction it can be adjusted, improving adjustment efficiency and accuracy. The reinforcing sleeve 412 and the extension sleeve 413 mainly support one side of the detection arm 414. The opening of the detection arm 414 is fitted into the plum blossom contact. The inclined plum blossom contact will apply a force to the detection arm 414. The force is mutual and will be transmitted to the reinforcing sleeve 412. With the connection of the reinforcing washer 411, the flexible platform 109 can be driven to tilt and swing. The multiple abutment rollers 304 are originally circumferentially distributed inside the detection arm 414. Even if the plum blossom contact can be smoothly fitted into the detection arm 414, the end of the plum blossom contact will still have A small angular deviation, meaning it won't be centered inside the detection arm 414, occurs as the plum blossom contact gradually fits into the detection arm 414. The offset portion of the plum blossom contact gradually approaches the abutment roller 304 and, after being pressed against the arc-shaped sectional surface of the abutment roller 304, is driven by the sleeve-type smoothness measuring mechanism 3, causing the movable plate 204 to move inside the movable groove 203. The bottom surface of the pointer 205 moves smoothly on the surface of the scale value 206, allowing for rapid calculation of the plum blossom contact's offset distance. The micro-magnifying glass 208, located directly above the pointer 205, magnifies the pointing of the pointer 205 relative to the scale value 206. The magnifying glass 208 amplifies the numerical values, allowing inspectors to clearly determine the distance of the plum blossom contact offset. This solves the problem of inspectors having blurred vision due to fatigue during long periods of work, making it difficult to see the values ​​clearly and reducing the risk of misreading or missing values. When the tilted plum blossom contact is inserted into the detection arm 414, the tilted surface is pressed against the contact roller 304. Under the action of the return spring 306, the telescopic rod 303 moves inside the survey cylinder 302, thus transmitting force to the movable plate 204. The acoustic sensor 305 generates specific high-frequency vibrations and abnormal noises to detect if the insertion of the detection arm 414 and the plum blossom contact is not smooth enough.

[0045] The acoustic sensor 305 and the two-dimensional force sensor 110 in this invention are common knowledge in the field. Their working principle is a well-known technology. The appropriate model is selected according to the actual use. Therefore, the control method and wiring arrangement of the acoustic sensor 305 and the two-dimensional force sensor 110 will not be explained in detail.

[0046] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-parameter integrated testing device for the sprite contacts of a switchgear trolley circuit breaker, characterized in that, include: Detection device body (100); The detection mechanism includes a detection arm (414) for determining positional deviation by fitting it with a plum blossom contact; A guiding and flexible floating mechanism (1) is provided on one side of the detection device body (100) for accurately positioning the offset contact and the deviation value between the contact and the contact arm; The offset calculation mechanism (2) is set at one end of the guide and flexible floating mechanism (1). The offset calculation mechanism (2) is equipped with a pointer (205) to detect the small angular deviation between the contact and the detection contact arm (414) when they are attached by the pointer (205) moving around. The nested smoothness surveying mechanism (3) is set on one side of the nested offset calculation mechanism (2) and is used to analyze the smooth curve of the detection arm (414) and the plum blossom contact through acoustic analysis.

2. The multi-parameter integrated testing device for the perforated contact of the switchgear trolley circuit breaker according to claim 1, characterized in that: The guiding and flexible floating mechanism (1) includes multiple guide rods (101), multiple guide plates (102), multiple floating grooves (103), multiple floating blocks (104), multiple auxiliary blocks (105), multiple auxiliary shafts (106), multiple first flexible hinges (107), multiple extension plates (108), multiple flexible platforms (109), multiple two-dimensional force sensors (110), multiple positioning plates (111), multiple L-shaped plates (112), multiple displacement plates (113), multiple passive plates (114), and multiple second flexible hinges (115).

3. The multi-parameter integrated testing device for the sprite contacts of the switchgear trolley circuit breaker according to claim 2, characterized in that: One side of each of the multiple guide plates (102) is fixedly connected to one end of each of the multiple guide rods (101), and the multiple two-dimensional force sensors (110) are respectively disposed on the back of the multiple flexible platforms (109) for accurately measuring the direction of the offset and the magnitude of the force.

4. The multi-parameter integrated testing device for the perpetual contact of the switchgear trolley circuit breaker according to claim 3, characterized in that: The positioning plate (111) is connected to the first flexible hinge (107) through an extension plate (108), and one side of the flexible platform (109) is connected to the displacement plate (113) through a second flexible hinge (115) and a passive plate (114), and the plum blossom contact for adaptive offset is fitted into the detection contact arm (414).

5. The multi-parameter integrated testing device for the perforated contacts of a switchgear trolley circuit breaker according to claim 1, characterized in that: The sleeve-type offset calculation mechanism (2) includes multiple binding sleeves (201), multiple binding plates (202), multiple movable slots (203), multiple movable plates (204), multiple pointers (205), multiple scale values ​​(206), multiple U-shaped plates (207), and multiple miniature magnifying glasses (208).

6. The multi-parameter integrated testing device for the sprite contacts of a switchgear trolley circuit breaker according to claim 5, characterized in that: The minute angle value of the offset of the fitted plum blossom contact can be measured by moving the pointer (205) on the scale value (206) surface.

7. The multi-parameter integrated testing device for the perpetual contact of the switchgear trolley circuit breaker according to claim 1, characterized in that: The sleeve-type smoothness surveying mechanism (3) includes multiple fitting sleeves (301), multiple surveying cylinders (302), multiple telescopic rods (303), multiple abutting rollers (304), multiple acoustic sensors (305), and multiple return springs (306).

8. The multi-parameter integrated testing device for the perforated contact of the switchgear trolley circuit breaker according to claim 7, characterized in that: When the inclined plum blossom contact is inserted into the detection contact arm (414), the inclined surface is pressed against the contact roller (304), and the acoustic sensor (305) generates specific high-frequency vibration and abnormal noise to detect that the insertion of the detection contact arm (414) and the plum blossom contact is not smooth enough.

9. The multi-parameter integrated testing device for the sprite contacts of a switchgear trolley circuit breaker according to claim 5, characterized in that: The micro magnifying glass (208) is located directly above the pointer (205) and is used to magnify the value when the scale value (206) is in contact with the pointer (205).

10. The multi-parameter integrated testing device for the sprite contacts of a switchgear trolley circuit breaker according to claim 4, characterized in that: The bottom of the detection device body (100) is provided with a support base (200), and a plurality of detection strips (300) are provided on one side of the detection device body (100). The detection mechanism also includes a plurality of reinforcing washers (411), a plurality of reinforcing sleeves (412) and a plurality of extension sleeves (413).

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