A multi-source online monitoring system for a wye contact

Abstract

This invention belongs to the technical field of electrical component testing equipment and discloses a multi-source online monitoring system for plum blossom contacts. The multi-source detector for plum blossom contacts includes a base and a housing, with the housing fitted over the outside of the base. Both the bottom wall of the base and the bottom wall of the housing have through holes, with the two through holes facing each other. A current transformer is installed in an annular groove on the outer wall of the base for inductive power extraction. This multi-source detector for plum blossom contacts integrates a pressure sensor, a temperature sensor, a laser sensor, and a current transformer, achieving multi-dimensional integrated detection of plum blossom contact clamping force, temperature, and insertion depth. It overcomes the limitations of traditional detectors that only detect a single parameter, enabling real-time, 24 / 7 online monitoring of plum blossom contacts and providing immediate feedback on any problems, thus solving the problems mentioned in the background art.

Description

Technical Field

[0001] This invention relates to the technical field of electrical component testing equipment, specifically a multi-source online monitoring system for plum blossom contacts. Background Technology

[0002] The plum blossom contact is a high-voltage, high-current sliding power connector with a multi-fin parallel structure. As a main conductive circuit connector, it is widely used in equipment such as disconnect switches, switch cabinets, and substation trolley switches. It features multiple contact points, good conductivity, and low contact resistance.

[0003] In a swivel contactor, the contact pressure between each contact finger and the contact conductor is provided by several annular springs. If the pressure of the annular springs is insufficient, it can easily lead to uneven distribution of contact pressure at each contact point, resulting in poor contact with the connector surface and increased resistance. This can cause the annular springs outside the contact fingers to weaken due to heating and annealing, creating a vicious cycle that may develop into overheating, causing insulation damage, arc discharge, and burnout of the switchgear. Furthermore, when the stationary contact is inserted into the swivel contactor, there is a chance that the contact fingers may become stuck or shift, causing a misalignment in the contact position between the contact fingers and the stationary contact surface. Therefore, a detector is needed to periodically inspect the swivel contactor. This is to detect whether the contact fingers are stuck or shifted in a timely manner, and to monitor in real time whether the pressure of the swivel contactor meets the working requirements and the operating temperature changes of the swivel contactor. Improving the ease of operation and accuracy of the detector is an urgent problem to be solved. Therefore, we propose a swivel contactor detector to solve the problems mentioned in the background technology. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-source online monitoring system for plum blossom contacts, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: a multi-source online monitoring system for plum blossom contacts, comprising a base and a housing, wherein the housing is sleeved on the outside of the base, and both the bottom wall of the base and the bottom wall of the housing are provided with perforations, and the two perforations are opposite to each other and coaxial, and a current transformer is installed in an annular groove on the outer wall of the base for inductive power extraction.

[0006] The base has several positioning blocks on its inner bottom wall and at the edge of the perforation. The base has several insertion interfaces on its bottom wall, and each insertion interface is arranged in a ring with reference to the base axis. A pressure detection component is inserted into the insertion interface to detect the clamping pressure of the plum blossom contact.

[0007] The pressure detection component includes a pressure contact block, which is inserted into the connector and its top two ends contact the bottom wall of the base. A pressure sensor is fixedly installed on the side of the pressure contact block near the through hole. A snap-fit ​​seat is provided at both the upper and lower ends of the pressure contact block near the through hole. A floating block is snapped into the snap-fit ​​seat, and the inner wall of the floating block abuts against both ends of the pressure sensor.

[0008] Preferably, the pressure detection component further includes an arc groove, and the pressure contact block has a continuous arc groove on the side away from the perforation.

[0009] Preferably, the inner sidewall of the base is provided with a surrounding component, and a mounting hole is provided on the sidewall of the base near the surrounding component. A winding component is inserted into the mounting hole for winding the surrounding piece, and the surrounding piece is pulled by the surrounding component to wrap around the outside of the contact finger of the plum blossom contact.

[0010] Preferably, the surrounding assembly includes an ultrasonic motor, a drive ring, a traction ring, and a traction block. The ultrasonic motor is installed in the annular groove on the inner sidewall of the base. The drive ring is fixedly connected to the output end of the ultrasonic motor. The outer wall of the traction ring is fixedly connected to the inner wall of the drive ring and is located outside the annular groove. The inner wall of the traction ring is fixedly connected to a traction block for traction of the surrounding piece. The traction block is U-shaped.

[0011] Preferably, the winding assembly includes a connector strip, a circular groove, a rotating shaft, a connecting sleeve, a traction hole, a planar spiral spring, ratchet teeth, an insertion hole, a rod, a spring plate, and a pawl. The connector strip is inserted into the mounting hole. One end of the rotating shaft is fixedly connected to the circular groove on the side of the connector strip near the traction ring. The connecting sleeve is movably sleeved on the rotating shaft. The winding piece is wound onto the connecting sleeve, and one end of the winding piece is fixedly connected to the outer wall of the connecting sleeve. The other end of the winding piece has a traction hole, and a traction block is inserted into the traction hole. A planar spiral spring is installed in the circular groove. The outer wall of the connecting sleeve is fixedly connected to the inner end of the planar spiral spring. A ring of ratchet teeth is provided on the outer wall of the connecting sleeve within the circular groove. An insertion hole is provided along the length of the connector strip and communicates with the circular groove. A rod is inserted into the insertion hole. The end of the rod near the circular groove is fixedly connected to a pawl via a spring plate, and the pawl is opposite to the ratchet teeth.

[0012] Preferably, a plurality of temperature sensors are arranged at equal intervals on the inner side of the surrounding plate, and the number of temperature sensors is the same as the number of contact points of the corresponding cloverleaf contacts.

[0013] Preferably, the outer wall of the base has two spring grooves corresponding to the opening of the mounting hole, and the spring grooves are connected to the mounting hole. A plug block is fixedly connected to the plug strip at the position corresponding to the spring groove. The plug block is inserted into the spring groove, and the plug block is movably connected to the bottom wall of the spring groove through a limiting spring. An adhesive groove is provided on the end face of the plug strip at the position corresponding to the opening of the insertion hole. An adhesive piece is fixedly connected to the end of the plug rod away from the pawl, and the adhesive piece is adhered to the adhesive groove.

[0014] Preferably, the outer side wall of the base is provided with a plurality of L-shaped slots on the upper side of the annular groove, and the L-shaped slots are connected to the annular groove. The inner side wall of the outer shell is provided with a snap-fit ​​post at the position of the L-shaped slot, and the snap-fit ​​post is snapped into the L-shaped slot to establish a connection between the outer shell and the base.

[0015] Preferably, the base has several card slots 1 on its side wall and above the annular groove, and card slots 2 are provided on the outer shell at the positions corresponding to card slots 1. The card slots 1 and 2 are fitted with elastic buckles that cooperate with the locking post and L-shaped slot to lock the position of the base and the outer shell.

[0016] Preferably, the outer wall of the base is provided with a mounting groove on the upper side of the annular groove, and a laser sensor is installed in the mounting groove for detecting the insertion depth of the stationary contact.

[0017] Preferably, the outer wall of the outer shell is provided with a plurality of actuating blocks for turning the outer shell, one side of the actuating blocks is provided with anti-slip texture, the bottom wall of the base is provided with a heat dissipation notch, and a heat dissipation through hole is provided on the bottom wall of the outer shell at the position corresponding to the heat dissipation notch.

[0018] By adopting the aforementioned technical solution, the beneficial effects of the present invention are:

[0019] 1. This multi-source detector for plum blossom contacts integrates a pressure sensor, a temperature sensor, a laser sensor, and a current transformer, enabling multi-dimensional integrated detection of plum blossom contact clamping force, temperature, and insertion depth. It breaks through the limitations of traditional detectors with single detection parameters, achieving real-time online detection of plum blossom contacts 24 / 7, providing real-time feedback when problems occur, and solving the problems mentioned in the background technology.

[0020] 2. This multi-source detector for plum blossom contacts adds a wrapping component and a winding component to complete the self-inspection of the contact finger wrapping. It uses an ultrasonic motor to drive the traction ring to rotate, which drives the flexible wrapping sheet to wrap the contact finger. Based on the release stroke of the wrapping sheet, it judges whether there are problems such as contact finger displacement, jamming, and insufficient insertion. The insertion status can be self-inspected without manual disassembly and observation. The detection is intuitive and highly intelligent. In addition, the wrapping sheet integrates a temperature sensor to perform contact detection on each contact finger, which greatly improves the detection accuracy and quickly identifies the location of abnormal temperature rise, solving the problems mentioned in the background technology. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 This is a perspective view (viewed from below) of the present invention.

[0023] Figure 2 This is a perspective view (top view) of the present invention.

[0024] Figure 3 This is an exploded view of the present invention.

[0025] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle.

[0026] Figure 5 This is a schematic diagram of the outer casing of the present invention.

[0027] Figure 6 This is a schematic diagram (top view) of the base of the present invention.

[0028] Figure 7 This is a bottom view of the base of the present invention.

[0029] Figure 8 For the present invention Figure 7 AA section view.

[0030] Figure 9 For the present invention Figure 8 Enlarged view of point B in the middle.

[0031] Figure 10 This is a schematic diagram of the structure of the winding assembly of the present invention.

[0032] Figure 11 For the present invention Figure 10 A magnified view of point C in the middle.

[0033] Figure 12 This is a schematic diagram of the connection structure between the traction ring and the traction block of the present invention.

[0034] Figure 13 This is a schematic diagram of the connection structure between the pressure contact block and the floating block of the present invention.

[0035] Figure 14 This is a cross-sectional view of the pressure contact block and the floating block of the present invention.

[0036] Figure 15 This is a schematic diagram of the bottom structure of the base of the present invention.

[0037] In the diagram: 1. Base; 2. Housing; 3. Encircling assembly; 31. Ultrasonic motor; 32. Drive ring; 33. Traction ring; 34. Traction block; 4. Rewinding assembly; 41. Connecting strip; 42. Circular groove; 43. Rotating shaft; 44. Connecting sleeve; 45. Traction hole; 46. Flat spiral spring; 47. Racket tooth; 48. Through hole; 49. Insert rod; 410. Spring; 411. Pawl; 5. Through hole; 6. Annular groove; 7. Current transformer; 8. Positioning block; 9. Pressure sensor; 10. Plug interface; 11. Snap-in socket 12. Floating block; 13. Heat dissipation through hole; 14. Pressure contact block; 15. Arc groove; 16. Mounting hole; 17. Surround plate; 18. Temperature sensor; 19. Spring groove; 20. Insertion block; 21. Limiting spring; 22. Adhesive groove; 23. Adhesive plate; 24. L-shaped slot; 25. Snap-fit ​​post; 26. Snap-fit ​​interface one; 27. Snap-fit ​​interface two; 28. Elastic buckle; 29. ​​Mounting groove; 30. Laser sensor; 35. Actuating block; 36. Anti-slip texture; 37. Heat dissipation notch; 38. Temperature detection module. Detailed Implementation

[0038] Please see Figure 1-15 This invention provides a technical solution: a multi-source online monitoring system for plum blossom contacts, comprising a base 1 and a housing 2, the housing 2 being fitted over the outside of the base 1. Both the base 1 and the housing 2 are made of insulating high-strength engineering plastic, providing dustproof, waterproof, and electromagnetic interference protection. Simultaneously, they provide physical protection for the internal detection structure, preventing leakage and structural damage under high-voltage operating conditions. Please refer to [link to relevant documentation]. Figure 15 The device's circuit board is mounted at the bottom of base 1. An external power interface is installed on the circuit board to power the ultrasonic motor 31. The circuit board should also be equipped with necessary wireless transmission modules and other related circuit boards. These are functional additions and are well-known technologies, so they will not be elaborated upon here. Please refer to [link to relevant documentation]. Figure 7 A temperature detection module 38 is also installed on the back of the equipment circuit board. A corresponding hole is opened on the base 1. During assembly, the hole is filled with thermally conductive material and comes into contact with the temperature detection module 38. The temperature detection module 38 is used to detect the temperature of the internal environment of the base 1. A through hole 5 is opened in the middle of the bottom wall of the base 1 and the bottom wall of the outer shell 2. The two through holes 5 are opposite and coaxial. The diameter of the hole is slightly larger than the outer diameter of the stationary contact, and a pre-reserved insertion gap is reserved to ensure that the stationary contact can be inserted into the plum blossom contact without deviation through the through hole 5 vertically, avoiding the insertion offset from affecting the detection accuracy. A current transformer 7 is installed in the annular groove 6 opened on the outer wall of the base 1 for inductive power extraction. The current transformer 7 is a switchable current transformer, which is sleeved inside the annular groove 6. It also includes a power conversion module (not shown in the figure) installed on the base 1. It is a non-contact induction of the high voltage circuit working current, which does not require an external power supply and is suitable for installation conditions in high voltage switch cabinets without external power supply, realizing the self-powering of the equipment.

[0039] Several positioning blocks 8 are provided on the inner bottom wall of the base 1, near the edge of the perforation 5. Please refer to [link / reference]. Figure 2 In this embodiment, there are two positioning blocks 8 to assist in positioning the base 1 as it is inserted into the plum blossom contact. After insertion, the positioning block 8 is positioned between the fingers of the plum blossom contact. The bottom wall of the base 1 has several insertion interfaces 10, and each insertion interface 10 is arranged in a ring with the axis of the base 1 as a reference. A pressure contact block 14 is inserted into the insertion interface 10. The top two ends of the pressure contact block 14 contact the bottom wall of the base 1 to provide a limit. A pressure sensor 9 is fixedly installed on the side of the pressure contact block 14 near the through hole 5. Both the upper and lower ends of the pressure contact block 14 near the through hole 5 are provided with snap-fit ​​seats 11. A floating block 12 is snapped into the snap-fit ​​seat 11, and the inner wall of the floating block 12 contacts the two ends of the pressure sensor 9. A continuous arc groove 15 is provided on the side of the pressure contact block 14 away from the through hole 5. The pressure contact block 14 can be made of hard, insulating, and wear-resistant ceramic material with high compressive strength to avoid deformation under pressure during long-term operation.

[0040] Please see Figure 13-14 The pressure contact block 14 and the snap-fit ​​base 11 are integrally formed. The pressure sensor 9 is fixed to the pressure contact block 14 by screws. The floating block 12 is connected to the snap-fit ​​base 11 through a snap-fit ​​structure to form a pressure detection assembly. The entire assembly is then inserted into the insertion interface 10 of the base 1. The floating block 12 can be snapped into the snap-fit ​​base 11 from the upper or lower side of the pressure contact block 14. The structural design of the snap-fit ​​base 11 allows the floating block 12 to move closer to or further away from the pressure contact block 14. The upper and lower ends of the inner side of the floating block 12 abut against the upper and lower ends of the pressure sensor 9. When the floating block 12 is pressed, it moves closer to the pressure contact block 14, causing the pressure sensor 9 to deform and generate an electrical signal to obtain pressure change data.

[0041] It should be noted that in this embodiment, the number of insertion interfaces 10 is three and arranged in a ring. The plum blossom contact is installed on the moving contact. When the base 1 is installed, it is directly fitted onto the plum blossom contact. The positioning block 8 and the floating block 12 are located within the interval between the two contact fingers at corresponding positions. The inner curvature of the floating block 12 is consistent with the curvature of the contact fingers of the plum blossom contact. The spring at the insertion end of the plum blossom contact is inserted into the arc-shaped groove 15, completing the installation of the base 1. After the outer shell 2 is inserted into the outside of the base 1, the stationary contact is inserted into the plum blossom contact through the through hole 5. The contact fingers of the plum blossom contact and the floating block 12 are in contact with the surface of the stationary contact. The insertion of the stationary contact causes the pressure sensor 9 to deform under the force on both sides, obtaining the pressure value. The real-time change of the spring clamping force at the insertion end of the plum blossom contact after the stationary contact is connected is detected, realizing the plum blossom contact. The detection process utilizes the three floating blocks 12 arranged in a ring to balance the pressure of the ring spring. Data from three pressure sensors 9 is collected and averaged to obtain the detection data. On the other hand, the difference between the data collected by the three pressure sensors 9 can serve as a reference for whether each contact is concentric. Specifically, a pressure difference threshold is preset. When the difference between the three pressure sensors 9 exceeds the preset value, it is determined that the force on each point of the ring spring is uneven, and the connection structure between the plum blossom contact and the stationary contact is deviated. In a milder case, some contact fingers are not pressured enough by the ring spring, and there is a risk of poor contact with the stationary contact. In a more serious case, the snapping position of the contact fingers and the bracket is deviated, resulting in uneven force. This situation can be verified with the information collected by the surrounding component 3.

[0042] As another embodiment, a single connector 10 design can be adopted, i.e., a single pressure detection mode.

[0043] The inner side wall of the base 1 is provided with a surrounding component 3. The side wall of the base 1 near the surrounding component 3 is provided with a mounting hole 16. A winding component 4 is inserted into the mounting hole 16 for winding the surrounding piece 17. The surrounding piece 17 is pulled by the surrounding component 3 to wrap around the outside of the contact finger of the plum blossom contact. The surrounding piece 17 is made of a flexible high temperature resistant insulating film, which has the characteristics of high toughness, not easy to break, and insulation and heat insulation. It can fit the surface of the contact finger without hard compression damage.

[0044] The surrounding assembly 3 includes an ultrasonic motor 31, a drive ring 32, a traction ring 33, and a traction block 34. The ultrasonic motor 31 is installed in the annular groove on the inner side wall of the base 1. The drive ring 32 is fixedly connected to the output end of the ultrasonic motor 31 and is driven to rotate by it. The outer wall of the traction ring 33 is fixedly connected to the inner wall of the drive ring 32 and is located outside the annular groove. The traction block 34 is fixedly connected to the inner wall of the traction ring 33 for traction of the surrounding piece 17. The traction block 34 is U-shaped.

[0045] The winding assembly 4 includes a connector strip 41, a circular groove 42, a rotating shaft 43, a connecting sleeve 44, a traction hole 45, a flat spiral spring 46, a ratchet 47, an insertion hole 48, a plug rod 49, a spring plate 410, and a pawl 411. The connector strip 41 is inserted into the mounting hole 16. One end of the rotating shaft 43 is fixedly connected to the circular groove 42 on the side of the connector strip 41 near the traction ring 33. The connecting sleeve 44 is movably sleeved on the rotating shaft 43. The winding piece 17 is wound onto the connecting sleeve 44, and one end of the winding piece 17 is fixedly connected to the outer wall of the connecting sleeve 44. The other end of the winding piece 17 has a traction hole 45, and the traction block 34 is inserted into the traction hole 45. A planar spiral spring 46 is installed in the circular groove 42. The outer wall of the connecting sleeve 44 is fixedly connected to the inner end of the planar spiral spring 46. A ring of ratchet teeth 47 is provided on the outer wall of the connecting sleeve 44 and inside the circular groove 42. An insertion hole 48 is provided on the insertion strip 41 along its length direction and communicates with the circular groove 42. An insertion rod 49 is inserted into the insertion hole 48. The end of the insertion rod 49 near the circular groove 42 is fixedly connected to a pawl 411 through a spring plate 410. The pawl 411 is opposite to the ratchet teeth 47. The spring plate 410 is made of elastic stainless steel sheet, which has high elasticity, fatigue resistance, and high axial strength, ensuring that the pawl 411 accurately engages with the ratchet teeth 47.

[0046] It should be noted that when the pawl 411 contacts the ratchet 47, it can limit the movement of the connecting sleeve 44 and restrict its unidirectional rotation. That is, when the surrounding assembly 3 pulls the surrounding piece 17 to wrap around the outside of the finger, the planar spiral spring 46 contracts and stores energy, and the pawl 411 limits the ratchet 47 so that the planar spiral spring 46 cannot rebound. After the surrounding piece 17 finishes wrapping the finger, it restricts the movement of the connecting sleeve 44 and maintains the wrapping state.

[0047] Furthermore, the length of the surrounding piece 17 is designed based on the diameter of the circle formed by connecting the middle of each finger after the corresponding pentagonal contact is inserted into the stationary contact. After the surrounding piece 17 on the connecting sleeve 44 is fully released, it can wrap around the finger. If the finger shifts or gets stuck after the stationary contact and the pentagonal contact are inserted, the surrounding piece 17 will not be able to wrap around each finger due to the protrusion of the finger. The ultrasonic motor 31 will not be able to complete the preset working stroke, indicating that there is a problem with the insertion of the stationary contact and the pentagonal contact, that is, some fingers are not in full contact with the surface of the stationary contact. It should be noted that the working stroke of the ultrasonic motor 31 is controlled and recorded by the built-in stroke encoder. If the stroke deviation exceeds the preset threshold, it can be determined that the insertion of the stationary contact and the pentagonal contact is abnormal. This is a well-known technology and will not be elaborated here.

[0048] Several temperature sensors 18 are arranged at equal intervals on the inner side of the surrounding plate 17. The number of temperature sensors 18 is the same as the number of the corresponding pendant fingers. The temperature sensors 18 are ceramic-encapsulated miniature resistive sensors attached to the inner side of the surrounding plate 17. When the surrounding plate 17 is wrapped around the periphery of the pendant by the surrounding component 3, each temperature sensor 18 contacts the outer side of each pendant to measure the temperature in real time and detect the temperature change of the pendant when it is working. Compared with the overall temperature measurement method of the prior art, the one-to-one temperature measurement method adopted in this technical solution has higher accuracy. In addition, with the temperature detection module 38, it can realize all-round temperature detection of the pendant fingers in the base 1.

[0049] Two spring grooves 19 are provided on the outer side wall of the base 1 at the position corresponding to the opening of the mounting hole 16, and the spring grooves 19 are connected to the mounting hole 16. A plug block 20 is fixedly connected on the plug strip 41 at the position corresponding to the spring groove 19. The plug block 20 is inserted into the spring groove 19, and the plug block 20 is movably connected to the bottom wall of the spring groove 19 through the limiting spring 21.

[0050] It should be noted that the design of the spring groove 19 provides the insertion strip 41 with movement space within the mounting hole 16. After the base 1 is inserted into the plum blossom contact, pressing the insertion strip 41 can make the surrounding piece 17 on the connecting sleeve 44 close to the finger spacing, so that the surrounding piece 17 can be pulled and wrapped around the outside of the finger by the surrounding assembly 3. After the outer shell 2 is fitted onto the base 1, the inner wall of the outer shell 2 contacts the insertion strip 41 to maintain its pressed position.

[0051] The end face of the connector strip 41 is provided with an adhesive groove 22 at the position corresponding to the opening of the insertion hole 48. The end of the plug rod 49 away from the pawl 411 is fixedly connected with an adhesive piece 23, which is bonded to the adhesive groove 22.

[0052] It should be noted that the adhesive sheet 23 and the adhesive groove 22 are connected using a reusable adhesive material, such as double-sided tape. After the adhesive sheet 23 is bonded to the adhesive groove 22, the pawl 411 and the ratchet 47 complete the establishment of the limiting structure. When it is necessary to recycle the surrounding piece 17, the adhesive sheet 23 and the adhesive groove 22 are separated, and the insert rod 49 is pulled outward to make the pawl 411 disengage from the ratchet 47. The connecting sleeve 44 is released so that the planar spiral spring 46 rebounds without restriction. At the same time, the externally connected electrically controlled ultrasonic motor 31 reverses and gradually releases the surrounding piece 17 so that it wraps around the connecting sleeve 44, thus achieving recycling.

[0053] Several L-shaped slots 24 are provided on the outer side wall of the base 1 above the annular groove 6, and the L-shaped slots 24 are connected to the annular groove 6. The inner side wall of the outer shell 2 is provided with a snap-fit ​​post 25 corresponding to the position of the L-shaped slot 24. The snap-fit ​​post 25 is snapped into the L-shaped slot 24 to establish the connection between the outer shell 2 and the base 1. Based on the shape of the L-shaped slot 24, and with the stroke insertion + rotation snap-fit ​​structure of the snap-fit ​​post 25, it has the function of preventing detachment and rotation.

[0054] Please see Figure 3 In the figure, a wire channel is also provided on the base 1 above the L-shaped slot 24 for circuit board wiring. Compared with the existing technology, this optimization greatly improves the neatness of the product's structural layout and helps to improve the equipment assembly efficiency.

[0055] The side wall of the base 1, above the annular groove 6, is provided with several card slots 26. The outer shell 2 is provided with card slots 27 corresponding to the card slots 26. The card slots 26 and 27 are fitted with elastic buckles 28, which work together with the locking post 25 and the L-shaped slot 24 to lock the position of the base 1 and the outer shell 2. The double locking structure of the base 1 and the outer shell 2 greatly improves the shock resistance, adapts to the vibration working environment inside the switch cabinet, and prevents loosening during long-term operation.

[0056] A mounting groove 29 is provided on the outer side wall of the base 1 and on the upper side of the annular groove 6, and a laser sensor 30 is installed in the mounting groove 29 for detecting the insertion depth of the stationary contact.

[0057] The outer wall of the outer casing 2 is provided with several actuating blocks 35 for turning the outer casing 2, and one side of the actuating block 35 is provided with anti-slip texture 36.

[0058] The bottom wall of the base 1 is provided with a heat dissipation notch 37, and the bottom wall of the outer shell 2 is provided with a heat dissipation through hole 13 corresponding to the heat dissipation notch 37.

[0059] It should be noted that, in addition to providing an air circulation channel, the heat dissipation notch 37 can also serve as an observation port to facilitate the installation personnel to observe the inside of the base 1. The design of the heat dissipation through hole 13 provides a heat dissipation channel and also provides a protective function.

[0060] When this equipment is in operation, the first step is to complete the pre-installation and fixing of the equipment. The traction block 34 is inserted into the traction hole 45 at the end of the circumferential plate 17. The operator then directly places the base 1 onto the outside of the plum blossom contact of the circuit breaker, so that the positioning block 8, pressure contact block 14 and floating block 12 at the bottom of the base 1 are precisely inserted into the gap between two adjacent contact fingers of the plum blossom contact. At the same time, the spring at the insertion end of the plum blossom contact is inserted into the arc groove 15 on the surface of the pressure contact block 14.

[0061] Simultaneously, manually press the connector strip 41, utilizing the extension and retraction characteristics of the limiting spring 21 to drive the connector block 20 to slide along the inside of the spring groove 19, pushing the winding assembly 4 to a position close to the touch finger; then, according to the arrow marking on the outer wall of the outer shell 2, align the outer shell 2 with the base 1, and align the outer shell 2 with the outer side of the base 1 to complete the sleeve. By rotating the outer shell 2, the locking post 25 on the inner side of the outer shell 2 is locked into the L-shaped locking groove 24 on the outer wall of the base 1, forming a plug-in rotation locking structure. Then, insert the elastic buckle 28 into the locking interface 1 26 and the locking interface 27 to complete the double locking of the base 1 and the outer shell 2. At the same time, the inner wall of the outer shell 2 presses the connector strip 41 to fix the pressing position of the connector strip 41 and lock the working spacing of the winding assembly 4.

[0062] During the stationary contact insertion stage, the stationary contact is inserted into the through hole 5 coaxially set at the bottom of the base 1 and the outer shell 2. After the stationary contact and the plum blossom contact make contact, the power transformer 7 is energized. The current transformer 7 uses the principle of electromagnetic induction to non-contactly sense the working current of the high voltage circuit. In conjunction with the power conversion module, the induced electrical energy is converted into a stable voltage required for the equipment to work. During this process, the laser sensor 30 in the mounting slot 29 monitors the insertion stroke of the stationary contact in real time, accurately determines the insertion depth of the stationary contact, and transmits the depth data to the background control system in real time to determine whether the insertion depth meets the equipment standard threshold, thus preventing problems such as shallow insertion or incomplete insertion.

[0063] After the stationary contact is inserted, the floating block 12 contacts the surface of the stationary contact. The pressure transmitted by the contact spring to the pressure contact block 14 and the squeezing force on the floating block 12 act on the pressure sensor 9. The pressure sensor 9 collects the clamping force data of the plum blossom contact spring in real time, continuously monitors the change of spring clamping force, accurately captures small clamping force fluctuations, judges the elastic performance and fatigue wear of the spring, and investigates potential faults such as spring loosening, aging, and jamming. At the same time, the wrapping detection process is started. The ultrasonic motor 31 on the inner side wall of the base 1 starts and drives the drive ring 32 to rotate. The drive ring 32 is linked with the traction ring 33 to rotate synchronously, pulling the surrounding piece 17 on the winding assembly 4. At this time, the connecting sleeve 44 rotates as the surrounding piece 17 is stretched. The planar spiral spring 46 inside the extrusion groove 42 completes energy storage. At the same time, the pawl 411 inside the insertion strip 41 clamps the ratchet 47 under the elastic action of the spring 410, restricting the reverse rotation of the connecting sleeve 44, preventing the planar spiral spring 46 from rebounding, and stably maintaining the stretched state of the surrounding piece 17.

[0064] The flexible, high-temperature resistant insulating material surrounding sheet 17 gradually covers the outside of each finger of the plum blossom contact. If the ultrasonic motor 31 completes the covering action according to the preset stroke, and the stroke deviation recorded by the stroke encoder is within the standard range, it is determined that the finger arrangement is neat, without offset or jamming, and the stationary contact and the plum blossom contact are in full contact. If the finger has deformation, offset, or jamming problems, it will prevent the surrounding sheet 17 from covering and adhering, causing the ultrasonic motor 31 to fail to reach the preset working stroke. If the stroke deviation exceeds the set threshold, the system will automatically determine that the contact is abnormally connected, accurately troubleshoot faults such as poor contact and finger misalignment, and it is necessary to disconnect the stationary contact and the plum blossom contact and adjust the finger on the plum blossom contact.

[0065] During the overall equipment testing process, temperature sensors 18, equidistantly arranged on the inner side of the surrounding plate 17, are individually attached to the corresponding plum blossom contact fingers. Using a one-to-one independent temperature measurement method, the working temperature of each contact finger is collected in real time. Compared with the traditional overall temperature measurement method, the temperature measurement accuracy is higher, and it can accurately identify problems such as abnormal heating of a single contact finger and excessive local temperature rise, and promptly investigate safety hazards such as excessive contact resistance, local loose connection, and short circuit heating. Pressure sensor 9 detects spring pressure in real time. At the same time, the heat dissipation notch 37 on the bottom wall of the base 1 and the heat dissipation through hole 13 on the bottom wall of the outer shell 2 cooperate to form a transparent heat dissipation channel, accelerate the air circulation inside the equipment, and dissipate the heat generated by the sensors and mechanical structure during the testing process in a timely manner, avoiding high temperature damage to the precision components inside the equipment and ensuring the stable operation of the equipment for a long time.

[0066] During equipment maintenance, first disconnect the stationary contact and the plum blossom contact, pull out the elastic buckle 28, rotate the outer shell 2 to disengage the locking post 25 from the L-shaped slot 24, separate the base 1 from the outer shell 2, and the operator can then retrieve the wrapping piece 17. First, peel off the adhesive piece 23 inside the adhesive groove 22, pull out the insertion rod 49, and drive the end pawl 411 to disengage from the ratchet 47, releasing the one-way limiting restraint of the connecting sleeve 44. Connect an external power supply to the circuit board to power the ultrasonic motor 31 and control its reverse rotation. With the help of the rebound force of the planar spiral spring 46, the wrapping piece 17 is re-wound onto the connecting sleeve 44, completing the flexible film storage. After storage, finally remove the base 1 from the plum blossom contact to complete a single complete inspection operation. After storage, the equipment can be reused for subsequent inspections.

[0067] Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multi-source online monitoring system for plum blossom contacts, comprising a base and a housing, characterized in that: The outer shell is fitted onto the outside of the base. Both the bottom wall of the base and the bottom wall of the outer shell have through holes, and the two through holes are opposite to each other and coaxial. A current transformer is installed in the annular groove on the outer wall of the base for inductive power extraction. The base has several positioning blocks on its inner bottom wall and at the edge of the perforation. The base has several insertion interfaces on its bottom wall, and each insertion interface is arranged in a ring with reference to the base axis. A pressure detection component is inserted into the insertion interface to detect the clamping pressure of the plum blossom contact. The pressure detection assembly includes a pressure contact block, a pressure sensor, a locking seat, and a floating block. The pressure contact block is inserted into the insertion interface, and its top two ends contact the bottom wall of the base. A pressure sensor is fixedly installed on the side of the pressure contact block near the through hole. Locking seats are provided at both the upper and lower ends of the pressure contact block near the through hole. A floating block is locked at the locking seat, and the inner wall of the floating block abuts against both ends of the pressure sensor.

2. The multi-source online monitoring system for plum blossom contacts according to claim 1, characterized in that: The pressure detection component also includes an arc groove, and the pressure contact block has a continuous arc groove on the side away from the perforation.

3. The multi-source online monitoring system for plum blossom contacts according to claim 2, characterized in that: The inner sidewall of the base is provided with a surrounding component. A mounting hole is provided on the sidewall of the base near the surrounding component. A winding component is inserted into the mounting hole for winding the surrounding piece. The surrounding piece is pulled by the surrounding component to wrap around the outside of the contact finger of the plum blossom contact.

4. The multi-source online monitoring system for plum blossom contacts according to claim 3, characterized in that: The surrounding assembly includes an ultrasonic motor, a drive ring, a traction ring, and a traction block. The ultrasonic motor is installed in the annular groove on the inner side wall of the base. The drive ring is fixedly connected to the output end of the ultrasonic motor. The outer wall of the traction ring is fixedly connected to the inner wall of the drive ring and is located outside the annular groove. The inner wall of the traction ring is fixedly connected to a traction block for traction of the surrounding piece. The traction block is U-shaped.

5. A multi-source online monitoring system for plum blossom contacts according to claim 4, characterized in that: The winding assembly includes a connector strip, a circular groove, a rotating shaft, a connecting sleeve, a traction hole, a planar spiral spring, ratchet teeth, an insertion hole, a rod, a spring, and a pawl. The connector strip is inserted into the mounting hole. One end of the rotating shaft is fixedly connected to the circular groove on the side of the connector strip near the traction ring. The connecting sleeve is movably sleeved on the rotating shaft. The winding piece is wound onto the connecting sleeve, and one end of the winding piece is fixedly connected to the outer wall of the connecting sleeve. The other end of the winding piece has a traction hole, and a traction block is inserted into the traction hole. A planar spiral spring is installed in the circular groove. The outer wall of the connecting sleeve is fixedly connected to the inner end of the planar spiral spring. A ring of ratchet teeth is provided on the outer wall of the connecting sleeve within the circular groove. An insertion hole is provided along the length of the connector strip and communicates with the circular groove. A rod is inserted into the insertion hole. The end of the rod near the circular groove is fixedly connected to a pawl via a spring, and the pawl is opposite to the ratchet teeth.

6. A multi-source online monitoring system for plum blossom contacts according to claim 5, characterized in that: The inner side of the surrounding plate is provided with several temperature sensors arranged at equal intervals, and the number of temperature sensors is the same as the number of contact points of the corresponding plum blossom contacts.

7. A multi-source online monitoring system for plum blossom contacts according to claim 6, characterized in that: Two spring grooves are provided on the outer wall of the base corresponding to the opening of the mounting hole, and the spring grooves are connected to the mounting hole. A plug block is fixedly connected to the plug strip at the position corresponding to the spring groove. The plug block is inserted into the spring groove, and the plug block is movably connected to the bottom wall of the spring groove through a limiting spring. An adhesive groove is provided on the end face of the plug strip at the position corresponding to the opening of the insertion hole. An adhesive piece is fixedly connected to the end of the plug rod away from the pawl, and the adhesive piece is adhered to the adhesive groove.

8. A multi-source online monitoring system for plum blossom contacts according to claim 7, characterized in that: The outer side wall of the base is provided with several L-shaped slots on the upper side of the annular groove, and the L-shaped slots are connected to the annular groove. The inner side wall of the outer shell is provided with a snap-fit ​​post corresponding to the position of the L-shaped slot. The snap-fit ​​post is snapped into the L-shaped slot to establish the connection between the outer shell and the base. The base has several card slots on its side wall and above the annular groove. Card slots are provided on the outer shell at the positions corresponding to card slots. Card slots 1 and 2 are fitted with elastic buckles that work with the locking posts and L-shaped slots to lock the position of the base and the outer shell.

9. A multi-source online monitoring system for plum blossom contacts according to claim 8, characterized in that: The base has an installation groove on its outer side wall, above the annular groove, and a laser sensor is installed in the installation groove for detecting the insertion depth of the stationary contact.

10. A multi-source online monitoring system for plum blossom contacts according to claim 9, characterized in that: The outer wall of the housing is provided with several actuating blocks for turning the housing. One side of the actuating blocks is provided with anti-slip texture. The bottom wall of the base is provided with heat dissipation notches. Heat dissipation through holes are opened on the bottom wall of the housing corresponding to the heat dissipation notches.

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