A partial discharge detection device for a ring main unit

Abstract

The present invention provides a partial discharge detection device for a ring main unit, belonging to the technical field of partial discharge detection. It includes a detection probe. The lower end of the detection probe is fixedly connected to a rectangular rod. A rectangular tube is movably installed on the outer side of the rectangular rod, and a driving module is installed at the upper end of the rectangular tube. The driving module includes a housing connected to the rectangular tube, a linkage piece fixedly connected to the upper end of the rectangular rod, a driven bearing unit, a maintenance unit, and a liquid discharge control unit. A motor is fixedly connected to one side of the housing, and a rotating rod is rotated inside the housing. A rotating disc is installed on the outer side of the rotating rod. The present invention solves the problems that the existing partial discharge detection device for a ring main unit using a dual-drive structure not only increases the production cost but also increases the production difficulty, and there is no corresponding maintenance structure, so it is impossible to perform self-maintenance on the drive structure, greatly shortening the inspection and maintenance cycle of the drive structure.

Description

Technical Field

[0001] The present invention belongs to the technical field of partial discharge detection, and particularly relates to a partial discharge detection device for a ring main unit (RMU). Background Art

[0002] The partial discharge detection of a ring main unit is an important link to ensure the safe operation of the power system. Partial discharge refers to a local discharge phenomenon occurring in the insulating medium of an electrical device. If this phenomenon is not discovered and processed in time, it may lead to equipment damage or even cause safety accidents. Currently, for partial discharge detection, a method that combines four detection methods, namely ultra-high frequency (UHF), transient earth voltage (TEV), ultrasonic wave (ULT), and current pulse method, is mainly adopted. It has high sensitivity and accuracy and has been widely used.

[0003] The prior art CN118275839B discloses a partial discharge detection device for a ring main unit as described in the present invention, which includes a detection probe and an extension unit; the detection probe is installed on the extension unit; the extension unit can push the detection probe between adjacent ring main units, and the extension unit includes a fixed component and a movable component; the fixed component includes a rectangular tube, through holes are symmetrically opened on both sides at one end of the rectangular tube, a driving structure is arranged at the position of the through holes, and the driving structure controls the movement of the movable component; the driving structure includes a gear, the gear is rotatably connected in the through hole, a rack is meshed inside the gear, and the rack is installed on the movable component; the movable component includes a rectangular rod slidably connected in the rectangular tube, racks are fixedly connected to both sides of the rectangular rod, and a detection probe is fixedly connected to the upper surface of one end of the rectangular rod. When detecting, the movement of the movable component is controlled by a double-driving structure, so that the rectangular rod extends out of the rectangular tube to realize the mobile detection of the ring main unit. The double-driving structure not only increases the production cost but also increases the production difficulty, and there is no corresponding maintenance structure, so the driving structure cannot perform self-maintenance, which greatly shortens the overhaul and maintenance cycle of the driving structure. Summary of the Invention

[0004] The present invention provides a partial discharge detection device for a ring main unit, aiming to solve the problems that the existing partial discharge detection device for a ring main unit adopts a double-driving structure, which not only increases the production cost but also increases the production difficulty, and there is no corresponding maintenance structure, so the driving structure cannot perform self-maintenance, which greatly shortens the overhaul and maintenance cycle of the driving structure.

[0005] An embodiment of the present invention provides a partial discharge detection device for a ring main unit, which includes a detection probe. The lower end of the detection probe is fixedly connected to a rectangular rod. A rectangular tube is movably installed on the outer side of the rectangular rod. A driving module is installed at the upper end of the rectangular tube. A rotating rod is screwed to the front end of the rectangular tube. A first limiting module is installed at the upper end of the rotating rod. A front-end support module is screwed in the cavity at the lower end of the rectangular rod. A second limiting module is installed on the side of the front-end support module;

[0006] The driving module includes a housing connected to the rectangular tube, a linkage piece fixedly connected to the upper end of the rectangular rod, a driven bearing unit, a maintenance unit and a liquid discharge control unit. A motor is fixedly connected to one side of the housing. A rotating rod is screwed inside the housing. A rotating disk is installed on the outer side of the rotating rod. A number of teeth are reserved on the upper wall surface of the linkage piece and the outer peripheral surface of the rotating disk, and they are engaged with each other through the teeth;

[0007] The driven bearing unit includes a first groove. Grooves are reserved in the middle of both sides of the linkage piece. A pair of brackets are screwed to both sides of the rotating disk. The lower ends of the pair of brackets are movably connected to the corresponding first grooves through a pair of variable bearing parts respectively;

[0008] The maintenance unit includes a liquid storage tank, which is assembled at the high position of the rotating disk. A liquid discharge channel is connected to the middle of the lower end of the liquid storage tank;

[0009] The lower end of the liquid discharge control unit is installed in a pair of brackets, and the upper end of the liquid discharge control unit extends into the liquid storage tank;

[0010] The liquid discharge control unit includes a first wedge-shaped block and a return part. A first wedge-shaped block is fixedly connected to both sides of the rotating disk through a tensioning screw rod four. A round hole adapted to the rotating rod is reserved on the first wedge-shaped block. A variable bar is movably installed at the upper end of each bracket. The lower end of the variable bar penetrates through the upper end of the bracket and is fixedly connected to a supporting piece. The lower end of the supporting piece touches the upper end of the corresponding first wedge-shaped block. A return part is installed between the supporting piece and the upper end of the corresponding bracket. The upper ends of the pair of variable bars are movably connected to the lower end of the liquid storage tank respectively. A blocking block is fixedly connected to the upper ends of the pair of variable bars. The middle of the blocking block is at the upper end of the liquid discharge channel.

[0011] Further, the return part includes a first spiral beryllium copper wire. A pair of first spiral beryllium copper wires are fixedly connected to both ends of the upper end of the supporting piece. The upper ends of the pair of first spiral beryllium copper wires are fixedly connected to the upper end inside the corresponding bracket respectively.

[0012] Further, the maintenance unit further includes a flow dividing part and an adjusting part. The lower end of the liquid discharge channel is fixedly connected to the upper end of the flow dividing part. Both sides of the flow dividing part are connected to the lower end of the liquid storage tank through the adjusting part.

[0013] Further, the driving module further includes a liquid discharge pressing unit. The lower end of the liquid discharge pressing unit is installed on one side of the rotating rod, and the upper end of the liquid discharge pressing unit is installed on one side of the liquid storage tank.

[0014] Furthermore, the hydraulic pressing unit includes a rubber cylinder, a pressing linkage part, and a pressing strength adjusting part. In the middle of one side of the liquid storage tank, an assembly table is fixedly connected. The lower end of the assembly table is fixedly connected to the rubber cylinder. The upper end of the rubber cylinder is connected to a connecting channel. One side of the upper end of the liquid storage tank is connected to an air injection channel. The other end of the air injection channel is connected to the other end of the connecting channel. At the lower end of one side of the liquid storage tank, a pressing linkage part is installed. On one side of the rotating rod, a pressing strength adjusting part is installed.

[0015] Furthermore, the pressing linkage part includes a square bar and a pressing table. On one side of the liquid storage tank, a restraining block is fixedly connected. The square bar is movably installed in the restraining block. The upper end of the square bar is fixedly connected to the pressing table. The pressing table is located below the rubber cylinder. The lower end of the square bar is fixedly connected to a concave seat. A disc is rotatably connected in the concave seat. The outer surface of the square bar between the restraining block and the concave seat is clamped with a helical beryllium copper wire three.

[0016] Furthermore, the pressing strength adjusting part includes a wedge block two and a lead screw two. In the middle of one side of the rotating rod, a connection port is reserved. At the upper end of one side of the rotating rod, a groove two is reserved along the central axis of the rotating rod. A hoop cylinder is clamped on one side of the rotating rod. Inside the hoop cylinder, a moving table two is fixedly connected. The moving table two is movably connected to the groove two. The lower end of the moving table two is fixedly connected to a threaded port cylinder located in the middle of the connection port. The lead screw two is rotatably connected in the connection port. The lead screw two is threadedly connected to the threaded port cylinder. On the outer peripheral surface of the hoop cylinder, three wedge blocks two are fixedly connected at equal intervals. The tips of the three wedge blocks two and the tip of the wedge block one are arranged in the same direction. The sizes of the tips of the three wedge blocks two gradually increase from inside to outside. The upper end of one of the wedge blocks two touches the lower end of the disc.

[0017] Furthermore, the drive module further includes a liquid recovery unit, and the liquid recovery unit is installed on the side wall of the linkage piece;

[0018] The liquid recovery unit includes a receiving piece and a recovery and liquid discharging part. On both sides of the linkage piece, at the upper end of the side wall of the groove one, the receiving piece is fixedly connected. At the side farther from the groove one at the upper end of the receiving piece and at both ends of the upper end of the receiving piece, protrusion pieces are fixedly connected. At the lower ends of both ends of the linkage piece, the recovery and liquid discharging parts are respectively installed.

[0019] Furthermore, the front end of the rectangular pipe is rotatably connected to a rotating rod. At the upper end of the rotating rod, a limiting module one is installed. The limiting module one includes an installation groove one reserved on the side of the rectangular pipe and an L-shaped rod fixedly connected to the side of the rectangular pipe. In the installation groove one, a helical beryllium copper wire four is fixedly connected. The other end of the helical beryllium copper wire four is fixedly connected to a limiting block one. One end of the limiting block one slides out of the installation groove one. The limiting block one and the L-shaped rod surround the outside of the rotating rod.

[0020] Furthermore, a front-end support module is screwed in the cavity at the lower end of the rectangular rod. A second limiting module is installed on the side of the front-end support module. The second limiting module is reserved in an installation groove two on the side wall of the cavity at the lower end of the rectangular rod. A spiral beryllium copper wire five is fixed in the installation groove two. The other end of the spiral beryllium copper wire five is fixed to a second limiting block, and the other end of the second limiting block slides out of the installation groove two.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. By arranging the driving module, the present invention uses a single driving structure to drive the movement of the rectangular rod, reducing the use cost and processing difficulty. At the same time, it can perform self-maintenance, which is convenient for use and extends the inspection and maintenance cycle. And by arranging the first limiting module and the second limiting module, the rotating rod and the front-end support module can be limited, thus ensuring that the rotating rod and the front-end support module will not rotate during movement, guaranteeing the normal progress of the detection work. And by arranging the first limiting module, it is ensured that the rotating rod can be stably retracted after use to prevent the rotating rod from detaching during movement.

[0023] 2. By arranging the driving module, the first wedge block is driven to rotate together with the rotating disk. Rotating the rotating disk one week can achieve the purpose of discharging engine oil once, thereby maintaining the rotating disk. When the maintained rotating disk engages with the linkage piece, the linkage piece is then maintained. When the rotating disk moves, the maintenance unit can continuously perform maintenance. When the rotating disk does not move, the maintenance unit stops performing maintenance, achieving the purpose of self-maintaining the rotating disk and the linkage piece. It is convenient to use and extends the inspection and maintenance cycle of the rotating disk and the linkage piece.

[0024] Other features and advantages of the present invention will be described in the following specification. And, some of them will become obvious from the specification, or can be understood by implementing the present invention. The objectives and other advantages of the present invention can be realized and obtained through the structures specifically pointed out in the specification and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0026] Figure 1 is a three-dimensional structural schematic diagram of an embodiment of the present invention;

[0027] Figure 2 is a partial sectional structural schematic diagram of a rectangular tube and a rectangular rod in an embodiment of the present invention;

[0028] Figure 3 is an installation sectional structural schematic diagram of a rectangular tube and a rectangular rod in an embodiment of the present invention;

[0029] Figure 4 Schematic diagram of the partial structure of the driving module from the first perspective according to an embodiment of the present invention;

[0030] Figure 5 According to an embodiment of the present invention Figure 4 Schematic diagram of the enlarged structure at M;

[0031] Figure 6 Schematic diagram of the partial structure of the driving module from the second perspective according to an embodiment of the present invention;

[0032] Figure 7 According to an embodiment of the present invention Figure 6 Schematic diagram of the upper part structure;

[0033] Figure 8 Schematic diagram of the partial structure of the driving module from the third perspective according to an embodiment of the present invention;

[0034] Figure 9 According to an embodiment of the present invention Figure 8 Schematic diagram of the partial structure;

[0035] Figure 10 Schematic diagram of the partial structure of the driving module from the fourth perspective according to an embodiment of the present invention;

[0036] Figure 11 According to an embodiment of the present invention Figure 10 Schematic diagram of the upper part structure;

[0037] Figure 12 Schematic diagram of the partial structure of the driving module from the fourth perspective according to an embodiment of the present invention;

[0038] Figure 13 According to an embodiment of the present invention Figure 12 Schematic diagram of the enlarged structure at N;

[0039] Figure 14 According to an embodiment of the present invention Figure 12 Schematic diagram of the upper part structure;

[0040] Figure 15 Schematic diagram of the cross-sectional top view of the first limiting module according to an embodiment of the present invention;

[0041] Figure 16 Schematic diagram of the cross-sectional top view of the second limiting module according to an embodiment of the present invention;

[0042] Figure numerals: 1, detection probe; 2, rectangular tube; 3, rectangular rod; 4, driving module; 5, rotating rod; 6, limit module 1; 8, front end support module; 9, limit module 2; 10, positioning module; 11, handle; 401, housing; 402, motor; 41, linkage plate; 42, rotating rod; 43, positioning bar; 44, rotating disk; 45, driven bearing unit; 451, groove 1; 452, variable platform 1; 453, tensioning screw 1; 454, bearing bar; 455, maintenance frame; 456, rotating ring; 457, connecting tube; 458, shielding plate; 46 , maintenance unit; 461, bearing plate; 462, tension screw 2; 463, liquid storage tank; 464, injection tube; 465, screw cap; 466, side plate; 467, tension screw 3; 468, drainage channel; 469, rubber channel; 4610, confluence channel; 4611, screw rod 1; 4612, diversion channel; 4613, switch 1; 4614, spray head; 4615, guide rod; 4616, connecting piece; 47, drainage control unit; 471, tension screw 4; 472, wedge block 1; 473, variable strip; 474, support sheet; 475, Spiral beryllium copper wire 1; 476, blocking block; 477, sealing block; 478, rotating column 1; 479, adjusting column; 4710, spiral beryllium copper wire 2; 4711, rotating column 2; 4712, connecting frame; 48, drainage and compression unit; 481, hoop; 482, wedge block 2; 483, groove 2; 484, variable platform 2; 485, thread mouth tube; 486, screw rod 2; 487, restraint block; 488, square bar; 489, concave seat; 4810, disc; 4811, spiral beryllium copper wire 3; 4812, compression platform; 4813, assembly platform; 48 14. Rubber cylinder; 4815. Connecting channel; 4816. Gas injection channel; 49. Liquid recovery unit; 491. Adapter plate; 492. Protruding plate; 493. Collecting cover; 494. Liquid discharge channel; 495. Switch 2; 61. Mounting slot 1; 62. Limit block 1; 63. Spiral beryllium copper wire 4; 64. L-shaped rod; 81. Support rod; 91. Mounting slot 2; 92. Spiral beryllium copper wire 5; 93. Limit block 2; 101. Movable slot; 102. Locking plate; 103. Spiral beryllium copper wire 6; 104. Mounting slot 3; 105. Unlocking block; 106. Toggle block. DETAILED DESCRIPTION

[0043] In order to make the objectives, technical solutions, and advantages of the technical solutions of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of specific embodiments of the present invention. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0044] Referring to Figure 1 and Figure 2 , an embodiment of the present invention provides a partial discharge detection device for a ring main unit, including a detection probe 1. The lower end of the detection probe 1 is fixedly connected to a rectangular rod 3. A rectangular tube 2 is movably installed on the outer side of the rectangular rod 3. A driving module 4 is installed at the upper end of the rectangular tube 2. A rotating rod 5 is screwed to the front end of the rectangular tube 2. A moving wheel is screwed to the lower end of the rotating rod 5. A first limiting module 6 is installed at the upper end of the rotating rod 5. A front-end support module 8 is screwed in the cavity at the lower end of the rectangular rod 3. A second limiting module 9 is installed on the side of the front-end support module 8. A positioning module 10 is installed on one side of the cavity at the lower end of the rectangular rod 3.

[0045] By installing the driving module 4, a single driving structure is used to drive the movement of the rectangular rod 3, reducing the use cost and processing difficulty. At the same time, it can be self-maintained, convenient to use, and extends the inspection and maintenance cycle. And by installing the first limiting module 6 and the second limiting module 9, the rotating rod 5 and the front-end support module 8 can be limited, thus ensuring that the rotating rod 5 and the front-end support module 8 will not rotate during movement, guaranteeing the normal progress of the detection work. And by installing the first limiting module 6, it is ensured that the rotating rod 5 can be stably retracted after use to prevent the rotating rod 5 from detaching during movement.

[0046] Referring to Figure 2 and Figure 3 , a number of rollers are screwed to both sides of the lower end of the rectangular rod 3. The rollers are in rolling connection with the lower wall surface of the rectangular tube 2, making the movement of the rectangular rod 3 smoother. Sliders are fixedly connected to both longitudinal sides of the rectangular rod 3. The sliders are movably installed in the chutes on the two longitudinal inner walls of the rectangular tube 2. The length of the chute is less than the length of the rectangular tube 2.

[0047] Referring to Figure 1 , grips 11 are screwed to the middle of the two side walls of the rectangular tube 2. By rotating the grips 11, the grips 11 are extended out of the rectangular tube 2. Then, after the rectangular rod 3 extends to the farthest position, detection can still be continued to move forward via the grips 11, expanding the detection range.

[0048] Referring to Figures 4 - 14, the driving module 4 includes a housing 401 connected to the rectangular tube 2 and a linkage piece 41 fixed to the upper end of the rectangular rod 3. One side of the housing 401 is fixedly connected to a motor 402, and a rotating rod 42 is rotatably connected inside the housing 401. A rotating disc 44 is arranged outside the rotating rod 42. A number of teeth are reserved on the upper wall surface of the linkage piece 41 and the outer peripheral surface of the rotating disc 44 and are engaged with each other through the teeth. Among them, the rotating disc 44 is connected to the center of the rotating rod 42 through a positioning bar 43 to ensure that the rotating disc 44 and the rotating rod 42 rotate together. It also includes a driven bearing unit 45, a maintenance unit 46 and a liquid discharge control unit 47;

[0049] The driven bearing unit 45 includes a first groove 451. The centers of both sides of the linkage piece 41 respectively reserve a first groove 451. Connecting cylinders 457 are respectively fixed to both sides of the rotating disc 44. A pair of connecting cylinders 457 are respectively rotatably connected to a pair of rotating rings 456. A pair of rotating rings 456 are respectively fixed in a pair of cages 455. A shielding piece 458 is clamped outside a pair of cages 455. The lower ends of a pair of cages 455 are respectively movably connected to the corresponding first groove 451 through a pair of variable bearing parts;

[0050] Among them, when the engine oil on the rotating disc 44 slides down along the side wall, it flows between the connecting cylinder 457 and the rotating ring 456, and the position where the connecting cylinder 457 is connected to the rotating ring 456 is maintained.

[0051] The variable bearing part includes a first variable table 452, a first tensioning screw 453, and a bearing bar 454. The centers of the lower ends of a pair of cages 455 are both fixedly connected to the bearing bar 454. The lower end of each bearing bar 454 is fixedly connected to the first variable table 452 through the first tensioning screw 453. The first variable table 452 is movably connected to the first groove 451 on the same side. The assembly of the first variable table 452 and the bearing bar 454 is facilitated through the first tensioning screw 453. The movable connection between the first variable table 452 and the first groove 451 can enable the rotating disc 44 and the linkage piece 41 to always maintain a stable engagement.

[0052] The maintenance unit 46 includes a liquid storage tank 463. The liquid storage tank 463 is assembled at a high position of the rotating disc 44. The center of the lower end of the liquid storage tank 463 is connected to a liquid discharge channel 468;

[0053] The maintenance unit 46 also includes a bearing piece 461 and a second tensioning screw 462. Bearing pieces 461 are respectively fixed to both sides of the liquid storage tank 463. The lower ends of a pair of bearing pieces 461 are respectively fixed to the lower ends of a pair of cages 455 through the second tensioning screw 462, so that the liquid storage tank 463 changes with the cages 455 and the rotating disc 44, ensuring that the engine oil discharged from the liquid discharge channel 468 can smoothly fall onto the rotating disc 44.

[0054] The maintenance unit 46 further includes a liquid injection pipe 464 and a rotary cap 465. The upper end of the liquid storage tank 463 is connected to the liquid injection pipe 464, and the rotary cap 465 is screwed onto the liquid injection pipe 464. Rotating the rotary cap 465 can open the liquid injection pipe 464, and oil can be injected into the liquid storage tank 463 through the liquid injection pipe 464. After the oil injection is completed, tightening the rotary cap 465 can close the liquid injection pipe 464, thereby realizing oil injection.

[0055] The maintenance unit 46 further includes a flow splitting part and an adjusting part. The lower end of the liquid discharge channel 468 is fixedly connected to the upper end of the flow splitting part, and both sides of the flow splitting part are connected to the lower end of the liquid storage tank 463 through the adjusting part. The flow splitting part can spray the engine oil flowing out from the liquid discharge channel 468 onto the rotating disk 44, enabling the engine oil to spread evenly, enhancing the maintenance function. The adjusting part can change the vertical span of the flow splitting part as required. When the rotating disk 44 is relatively large, the flow splitting part can be adjusted upward to prevent it from obstructing the rotation of the rotating disk 44.

[0056] The flow splitting part includes a rubber channel 469, a confluence channel 4610, a flow splitting channel 4612, a switch 1 4613, and a liquid spraying head 4614. The lower end of the liquid discharge channel 468 is connected to the upper end of the confluence channel 4610 through the rubber channel 469. Both ends of the confluence channel 4610 are sealed. The lower end of the confluence channel 4610 is equally spaced and connected to a number of flow splitting channels 4612. The lower end of each flow splitting channel 4612 is fixedly connected to the liquid spraying head 4614, and a switch 1 4613 is installed in the middle of each flow splitting channel 4612. The engine oil discharged from the liquid discharge channel 468 flows into the confluence channel 4610 through the rubber channel 469, and then can be transported to the liquid spraying head 4614 through the flow splitting channels 4612. Through the liquid spraying head 4614, the engine oil can be sprayed onto the rotating disk 44, enhancing the maintenance function. The liquid spraying amount of the liquid spraying head 4614 can be adjusted by using the switch 1 4613. The liquid discharge can be increased near the center of the rotating disk 44 and decreased near the side wall of the rotating disk 44, preventing excessive liquid discharge at the position of the side wall of the rotating disk 44 and increasing losses. The rubber channel 469 enables the confluence channel 4610, the flow splitting channels 4612, and the liquid spraying head 4614 to move vertically under the action of the adjusting part.

[0057] The adjusting part includes a lead screw 1 4611, a guiding rod 4615, and a connecting piece 4616. Both ends of the confluence channel 4610 are fixedly connected to the connecting piece 4616 respectively. The guiding rod 4615 is movably installed on one of the connecting pieces 4616, and the upper end of the guiding rod 4615 is fixedly connected to the lower end of the liquid storage tank 463. The lead screw 1 4611 is screwed onto the other connecting piece 4616, and the upper end of the lead screw 1 4611 is rotatably connected to the lower end of the liquid storage tank 463. Rotating the lead screw 1 4611, the threaded connection between the lead screw 1 4611 and the connecting piece 4616 can drive the confluence channel 4610 to move vertically along the guiding rod 4615.

[0058] The lower end of the liquid discharge control unit 47 is installed in a pair of holders 455, and the upper end of the liquid discharge control unit 47 extends into the liquid storage tank 463.

[0059] The liquid discharge control unit 47 includes a tension screw four 471, a wedge block one 472, a moving bar 473, a support piece 474, a blocking block 476 and a return part. Both sides of the rotating disk 44 are respectively connected to the wedge block one 472 through the tension screw four 471. There is a circular opening on the wedge block one 472 that fits the rotating rod 42. The upper end of each holder 455 is movably installed with the moving bar 473. The lower end of the moving bar 473 penetrates the upper end of the holder 455 and is connected to the support piece 474. The lower end of the support piece 474 touches the upper end of the corresponding wedge block one 472. A return part is installed between the support piece 474 and the upper end of the corresponding holder 455. The upper ends of the pair of moving bars 473 are respectively movably connected to the lower end of the liquid storage tank 463. The upper ends of the pair of moving bars 473 are connected to the blocking block 476. The center of the blocking block 476 is at the upper end of the liquid discharge channel 468.

[0060] When the rotating disk 44 rotates, it drives the wedge block one 472 to rotate. When the wedge block one 472 is in a pressing state, the wedge block one 472 presses the moving bar 473 to move upward through the support piece 474, pushing the blocking block 476 upward, thereby opening the liquid discharge channel 468 at the lower end of the liquid storage tank 463, enabling the engine oil in the liquid storage tank 463 to drain from the liquid discharge channel 468 and fall onto the rotating disk 44 for maintenance. At this time, the return part shrinks. Then the wedge block one 472 continues to rotate with the rotating disk 44. At this time, the blocking block 476 is still higher than the liquid discharge channel 468, and the liquid discharge channel 468 remains open for continuous liquid discharge. Then, as the rotating disk 44 and the wedge block one 472 continue to rotate, during the return of the wedge block one 472, the return part restores, driving the support piece 474 and the moving bar 473 to move downward. The moving bar 473 drives the blocking block 476 to move downward, and the blocking block 476 blocks the opening of the liquid discharge channel 468, preventing the engine oil from flowing out. Then the wedge block one 472 rotates. At this time, the opening of the liquid discharge channel 468 remains closed. When the rotating disk 44 rotates one week, the above actions are completed. With the continuous rotation of the rotating disk 44, the liquid discharge channel 468 can be intermittently opened and closed, thereby automatically maintaining the rotating disk 44 and the linkage piece 41.

[0061] The liquid discharge control unit 47 further includes a sealing block 477. The lower end of the center of the blocking block 476 is connected to the sealing block 477. The sealing block 477 is arranged opposite to the liquid discharge channel 468. The sealing block 477 replaces the blocking block 476 to close the opening of the liquid discharge channel 468, strengthening the blocking effect of the blocking block 476 on the liquid discharge channel 468. The sealing block 477 is a rubber block.

[0062] The return part includes a spiral beryllium copper wire 475. Both ends of the upper end of the support piece 474 are fixedly connected to a pair of spiral beryllium copper wires 475. The upper ends of the pair of spiral beryllium copper wires 475 are respectively fixedly connected to the upper ends inside the corresponding support frame 455. When the moving bar 473 moves upward, the support piece 474 moves upward and presses the spiral beryllium copper wire 475. During the return of the wedge block 472, the spiral beryllium copper wire 475 presses the moving bar 473, the support piece 474, the blocking block 476 and the sealing block 477 to move downward and return, so that the sealing block 477 blocks the liquid discharge channel 468.

[0063] The return part further includes a rotating column 478, an adjusting column 479, a spiral beryllium copper wire 4710, a rotating column 4711, and a connecting frame 4712. The upper ends of the pair of moving bars 473 are respectively rotatably connected to the lower ends of a pair of adjusting columns 479 through the rotating column 478. The upper ends of the pair of adjusting columns 479 are respectively rotatably connected to a pair of connecting frames 4712 through the rotating column 4711. The pair of connecting frames 4712 are respectively fixedly connected to the upper ends inside the liquid storage tank 463. A blocking ring is fixedly connected to both ends of each adjusting column 479. A spiral beryllium copper wire 4710 is hoop-connected to each adjusting column 479. Both ends of the spiral beryllium copper wire 4710 are respectively connected to the blocking rings at both ends of the adjusting column 479. When the moving bar 473 moves upward, the spiral beryllium copper wire 4710 shortens. When the moving bar 473 moves downward, the deformation of the spiral beryllium copper wire 4710 presses the support piece 474 to move downward and return to its original position. The spiral beryllium copper wire 4710 can assist the spiral beryllium copper wire 475 to act together, and can ensure the smoothness of the return of the blocking block 476, the moving bar 473, and the support piece 474.

[0064] The maintenance unit 46 further includes a side plate 466 and a tensioning lead screw 467. One side of the liquid storage tank 463 is open. The mouth of the liquid storage tank 463 is fixedly connected to the side plate 466 through the tensioning lead screw 467, and the mouth is sealed through the side plate 466 and the tensioning lead screw 467. The side plate 466 is removed to assemble components in the liquid storage tank 463.

[0065] During operation, the motor 402 drives the rotation of the rotating rod 42. The rotating rod 42 drives the rotation of the rotating disc 44. The engagement between the rotating disc 44 and the linkage piece 41 causes the linkage piece 41 to change. The cage 455 is rotatably connected to the rotating disc 44. The cage 455 changes along the groove path 451 via the changing bearing portion, enabling the linkage piece 41 to maintain a stable engagement with the rotating disc 44. When the rotating disc 44 rotates, it drives the cage 455 to change on the linkage piece 41. The cage 455 is movably connected to the changing bearing portion and the groove path 451 to perform bearing guidance on the cage 455, thereby ensuring the stability of the drive module 4. When the rotating rod 42 and the rotating disc 44 rotate, the drain control unit 47 can open the drain channel 468 at the lower end of the liquid storage tank 463, allowing the engine oil filled in the liquid storage tank 463 to drop onto the rotating disc 44. The engine oil is applied to the linkage piece 41 as the rotating disc 44 rotates. The engine oil maintains the linkage piece 41 and the rotating disc 44, achieving the purpose of self-maintenance of the rotating disc 44 and the linkage piece 41.

[0066] Refer to Figures 4 - 14 , the drive module 4 further includes a drain pressure unit 48. The lower end of the drain pressure unit 48 is installed on one side of the rotating rod 42, and the upper end of the drain pressure unit 48 is installed on one side of the liquid storage tank 463. Through the drain pressure unit 48, the engine oil in the liquid storage tank 463 can flow smoothly out of the drain channel 468 and the diversion portion. As the rotating rod 42 rotates to drive the drain pressure unit 48 to act, air is added to the liquid storage tank 463 to increase its compression strength, pressing out the engine oil cup in the liquid storage tank 463, enabling the engine oil to flow out smoothly.

[0067] The drain pressure unit 48 includes an assembly table 4813, a rubber cylinder 4814, a connection channel 4815, an air injection channel 4816, a compression linkage portion, and a compression strength adjustment portion. The center of one side of the liquid storage tank 463 is fixedly connected to the assembly table 4813. The lower end of the assembly table 4813 is fixedly connected to the rubber cylinder 4814. The upper end of the rubber cylinder 4814 is connected to the connection channel 4815. One side of the upper end of the liquid storage tank 463 is connected to the air injection channel 4816. The other end of the air injection channel 4816 is connected to the other end of the connection channel 4815. The compression linkage portion is installed at the lower end of one side of the liquid storage tank 463, and the compression strength adjustment portion is installed on one side of the rotating rod 42.

[0068] The compression intensity adjustment part can change the distance by which the rotating rod 42 lifts the compression linkage part upward when rotating, and then can adjust the size of the shortening of the rubber cylinder 4814. The size of the shortening of the rubber cylinder 4814 will adjust the amount of gas added to the liquid storage tank 463, and then can control the amount of oil drained. When the rubber cylinder 4814 is compressed, the gas inside the rubber cylinder 4814 flows through the check valve at the upper end into the connection channel 4815, and then flows into the liquid storage tank 463 through the gas injection channel 4816. When the compression linkage part moves downward and separates from the rubber cylinder 4814, under the deformation of the rubber cylinder 4814, the external gas flows into the rubber cylinder 4814 through the check valve on the side of the rubber cylinder 4814 for subsequent compression and gas addition.

[0069] The compression linkage part includes a restraint block 487, a square bar 488, a concave seat 489, a disc 4810, a helical beryllium copper wire three 4811 and a compression table 4812. One side of the liquid storage tank 463 is fixedly connected with the restraint block 487. The square bar 488 is movably installed in the restraint block 487. The upper end of the square bar 488 is fixedly connected with the compression table 4812. The compression table 4812 is located below the rubber cylinder 4814. The lower end of the square bar 488 is fixedly connected with the concave seat 489. The disc 4810 is screwed in the concave seat 489. The outer surface of the square bar 488 between the restraint block 487 and the concave seat 489 is clamped with the helical beryllium copper wire three 4811.

[0070] When the wedge block two 482 on the compression intensity adjustment part rotates and the tip of the wedge block two 482 touches the disc 4810, the concave seat 489 and the square bar 488 are pressed upward through the disc 4810, and then the compression table 4812 is pressed upward to compress the rubber cylinder 4814, so that the rubber cylinder 4814 adds gas to the liquid storage tank 463 to increase the compression intensity. At this time, the helical beryllium copper wire three 4811 shortens. When the wedge block two 482 returns, the helical beryllium copper wire three 4811 extends, pulling the concave seat 489 and the square bar 488 downward.

[0071] The pressing intensity adjusting part includes a hoop cylinder 481, a second wedge block 482, a second groove 483, a second moving platform 484, a threaded barrel 485, and a second lead screw 486. A connection port is reserved in the middle of one side of the rotating rod 42. A second groove 483 is reserved at the upper end of one side of the rotating rod 42 along the central axis of the rotating rod 42. The hoop cylinder 481 is clamped to one side of the rotating rod 42. The second moving platform 484 is fixedly connected inside the hoop cylinder 481. The second moving platform 484 is movably connected to the second groove 483. The lower end of the second moving platform 484 is fixedly connected to the threaded barrel 485 located in the middle of the connection port. The second lead screw 486 is screwed in the connection port. The second lead screw 486 is threadedly connected to the threaded barrel 485. Three second wedge blocks 482 are fixedly connected to the outer peripheral surface of the hoop cylinder 481 at equal intervals. The tips of the three second wedge blocks 482 and the tips of the first wedge block 472 are arranged in the same direction. The sizes of the tips of the three second wedge blocks 482 gradually increase from inside to outside. The upper end of one of the second wedge blocks 482 touches the lower end of the disc 4810.

[0072] The three second wedge blocks 482 and the first wedge block 472 rotate together. When the first wedge block 472 pulls the moving strip 473, the blocking block 476 and the sealing block 477 to move upward so that the drain passage 468 can drain the engine oil, the tips of the second wedge blocks 482 also just pull the pressing linkage part to move upward, causing the rubber cylinder 4814 to add gas into the liquid storage tank 463 to press out the engine oil. The gas addition and liquid drainage are carried out together. Rotate the second lead screw 486. The threaded connection between the second lead screw 486 and the threaded barrel 485 can pull the second moving platform 484 to move along the second groove 483, and then pull the hoop cylinder 481 to move along the rotating rod 42, and then make the upper end of the corresponding second wedge block 482 touch the lower end of the disc 4810. When the second lead screw 486 rotates, the hoop cylinder 481 moves outward. Due to the different sizes of the tips of the three second wedge blocks 482, the reduction sizes of the pressed rubber cylinder 4814 are different, and then the amount of gas added into the liquid storage tank 463 is adjusted, and then the amount of engine oil added is adjusted.

[0073] Refer to Figures 4 - 14 , the drive module 4 further includes a liquid recovery unit 49. The liquid recovery unit 49 is installed on the side wall of the linkage piece 41. The liquid recovery unit 49 can recover the excess engine oil on the linkage piece 41.

[0074] The liquid recovery unit 49 includes a receiving piece 491. The receiving piece 491 is fixedly connected to the upper ends of the two sides of the linkage piece 41 on the side wall of the first groove 451. The protruding pieces 492 are fixedly connected to the side farther from the first groove 451 at the upper end of the receiving piece 491 and both ends of the upper end of the receiving piece 491. The recovery and drainage parts are respectively installed at the lower ends of both ends of the linkage piece 41.

[0075] During operation, the excess oil on the linkage piece 41 flows along the side wall of the linkage piece 41 to the receiving piece 491. Due to the installation of the lug 492, the oil flows into the first groove 451, which can maintain the lower end of the variable bearing part, enabling the variable bearing part to move along the first stable groove 451. The excess oil in the first groove 451 flows out from the head end and into the recovery and drainage part for recovery.

[0076] Among them, the recovery and drainage part includes a collecting cover 493, a drainage channel 494, and a second switch 495. The two ends of the linkage piece 41 are respectively fixed to the collecting cover 493. When the first variable table 452 moves in the first groove 451, the excess oil in the first groove 451 is pushed to the collecting cover 493 through the head end of the first groove 451 for recovery. The side of the collecting cover 493 is connected to the drainage channel 494, and the second switch 495 is installed on the drainage channel 494. After a certain amount of oil is recovered in the collecting cover 493, the second switch 495 can be opened to drain the oil in the collecting cover 493 through the drainage channel 494, so as to facilitate the reuse of the oil.

[0077] Refer to Figure 1 and Figure 15 The first limiting module 6 includes a first installation groove 61 reserved on the side of the rectangular tube 2 and an L-shaped rod 64 fixed to the side of the rectangular tube 2. A fourth helical beryllium copper wire 63 is fixed in the first installation groove 61. The other end of the fourth helical beryllium copper wire 63 is fixed to a first limiting block 62. One end of the first limiting block 62 slides out of the first installation groove 61, and the first limiting block 62 and the L-shaped rod 64 surround the outside of the rotating rod 5.

[0078] When it is necessary to lower the rotating rod 5, the first limiting block 62 is pressed into the first installation groove 61. When the rotating rod 5 rotates downward under the action of its own gravity, the rotating rod 5 moves away from the first limiting block 62. With the cooperation of the fourth helical beryllium copper wire 63, the first limiting block 62 moves out of the first installation groove 61, and the L-shaped rod 64 and the first limiting block 62 limit the rotating rod 5, thereby preventing the rotation of the rotating rod 5 during movement. After use, the first limiting block 62 is pressed into the first installation groove 61, and the rotating rod 5 is rotated in the reverse direction. The rotating rod 5 is rotated out of the L-shaped rod 64 and moved above the first limiting block 62, thereby stably carrying the rotating rod 5 and ensuring that the rotating rod 5 can be stably retracted after use to prevent the rotating rod 5 from detaching during movement.

[0079] Refer to Figure 2 The front-end support module 8 includes a support rod 81 rotatably connected to the lower cavity of the rectangular rod 3. The lower end of the support rod 81 is rotatably connected to a moving wheel, and a torsion spring is installed between the support rod 81 and the side wall of the lower cavity of the rectangular rod 3.

[0080] When the rectangular rod 3 extends to more than half of its own length, the positioning module 10 unlocks the support rod 81, and the support rod 81 quickly drops to support the rectangular rod 3, ensuring the stability of the device during use.

[0081] Reference Figure 2 and Figure 16 The limiting module 2 9 reserves an installation groove 2 91 on the side wall of the cavity at the lower end of the rectangular rod 3, and a spiral beryllium copper wire 5 92 is fixedly connected in the installation groove 2 91. The other end of the spiral beryllium copper wire 5 92 is fixedly connected to a limiting block 2 93, and the other end of the limiting block 2 93 slides out of the installation groove 2 91.

[0082] When the rectangular rod 3 moves to a length greater than half of its own length, the support rod 81 rotates downward, and with the cooperation of the spiral beryllium copper wire 5 92, the limit block 2 93 extends out of the installation slot 2 91, and then the support rod 81 is limited by the limit block 2 93 and the cavity to ensure stable movement of the device during use. After use, the limit block 2 93 is pressed into the installation slot 2 91, and the support rod 81 is rotated in the opposite direction. The positioning module 10 positions the support rod 81 to ensure stable storage of the support rod 81.

[0083] Reference Figure 2 The positioning module 10 includes an active groove 101 reserved on the right side of the cavity at the lower end of the rectangular rod 3 and an installation groove three 104 reserved on the lower wall surface inside the rectangular tube 2. A Z-shaped locking piece 102 is movably installed in the active groove 101. One end of the locking piece 102 can be engaged in the limiting opening at the lower end of the support rod 81. The locking piece 102 is connected to the side wall of the active groove 101 via a spiral beryllium copper wire six 103. The other end of the locking piece 102 is fixedly connected to a toggle block 106. The lower end of the toggle block 106 movably passes through the active groove 101. An unlocking block 105 is screwed into the installation groove three 104. The upper end of the unlocking block 105 is above the lower end of the toggle block 106. Torsion springs are installed at both ends of the unlocking block 105. One end of the torsion spring is connected to the unlocking block 105, and the other end of the torsion spring is connected to the side wall of the installation groove three 104.

[0084] When the extended length of the rectangular rod 3 is greater than half of its own length, the toggle block 106 first contacts the unlocking block 105, and the spiral beryllium copper wire 103 is shortened first. The toggle block 106 pulls the locking plate 102 to change, so that the locking plate 102 moves out of the limit opening on the support rod 81, and the positioning of the locking plate 102 on the support rod 81 is cancelled. When the rectangular rod 3 continues to be moved, the toggle block 106 drives the unlocking block 105 to rotate, and the toggle block 106 passes the unlocking block 105. The rectangular rod 3 continues to extend to perform detection, and the locking plate 102 and the unlocking block 105 return to their original positions under the action of the spiral beryllium copper wire 103 and the torsion spring.

[0085] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A partial discharge detection device for a ring main unit, characterized in that: It comprises a detection probe, the lower end of the detection probe is fixedly connected to a rectangular rod, a rectangular tube is movably arranged outside the rectangular rod, and a driving module is arranged at the upper end of the rectangular tube; The driving module includes a shell connected to the rectangular tube, a linkage plate fixed to the upper end of the rectangular rod, a driven bearing unit, a maintenance unit and a liquid discharge control unit. One side of the shell is fixed to the motor, the inner side of the shell is screwed to the rotating rod, and the outer side of the rotating rod is provided with a rotating disk. A plurality of teeth are reserved on the upper wall surface of the linkage plate and the outer peripheral surface of the rotating disk, and the teeth are engaged with each other. The driven bearing unit includes a groove one, and a groove one is reserved in the middle of each side of the linkage plate. A pair of retaining frames are connected to the two sides of the rotating disk, and the lower ends of the pair of retaining frames are movably connected to the corresponding groove one via a pair of variable bearing parts. The maintenance unit includes a liquid storage tank, which is installed at a high position of the rotating disk, and the middle of the lower end of the liquid storage tank is connected to a drainage channel; The lower end of the liquid discharge control unit is arranged in a pair of retaining frames, and the upper end of the liquid discharge control unit extends into the liquid storage tank; The liquid discharge control unit includes a wedge block and a return part. The two sides of the rotating disk are respectively fixedly connected to the wedge block via a tensioning screw four. A circular opening for fitting the rotating rod is reserved on the wedge block. A variable bar is movably installed on the upper end of each retaining frame. The lower end of the variable bar passes through the upper end of the retaining frame and is fixedly connected to a supporting plate. The lower end of the supporting plate touches the upper end of the corresponding wedge block. A return part is installed between the supporting plate and the upper end of the corresponding retaining frame. The upper ends of a pair of variable bars are respectively movably connected to the lower end of the liquid storage tank. The upper ends of a pair of variable bars are fixedly connected to a blocking block. The center of the blocking block is located at the upper end of the liquid discharge channel.

2. A ring main unit partial discharge detection device according to claim 1, characterized in that: The return part comprises a spiral beryllium copper wire, and the two ends of the upper end of the support plate are fixedly connected with a pair of spiral beryllium copper wires, and the upper ends of the pair of spiral beryllium copper wires are respectively fixedly connected to the upper ends of the corresponding retaining frames.

3. A ring main unit partial discharge detection device according to claim 1, characterized in that: The maintenance unit also includes a diverter part and an adjusting part. The lower end of the drainage channel is fixedly connected to the upper end of the diverter part, and the two sides of the diverter part are connected to the lower end of the liquid storage tank via the adjusting part.

4. A ring main unit partial discharge detection device according to claim 1, characterized in that: The driving module also includes a liquid discharge pressing unit, the lower end of which is arranged on one side of the rotating rod, and the upper end of which is arranged on one side of the liquid storage tank.

5. A partial discharge detection device for a ring main unit according to claim 3, characterized in that: The liquid discharge and compression unit includes a rubber tube, a compression linkage part and a compression strength adjustment part. The center of one side of the liquid storage tank is fixedly connected to the assembly table, the lower end of the assembly table is fixedly connected to the rubber tube, the upper end of the rubber tube is connected to the connecting channel, one side of the upper end of the liquid storage tank is connected to the air injection channel, the other end of the air injection channel is connected to the other end of the connecting channel, the compression linkage part is installed at the lower end of one side of the liquid storage tank, and the compression strength adjustment part is installed on one side of the rotating rod.

6. A ring main unit partial discharge detection device according to claim 5, characterized in that: The compression linkage part includes a square bar and a compression platform. One side of the liquid storage tank is fixedly connected to the constraint block. The square bar is movably installed in the constraint block. The upper end of the square bar is fixedly connected to the compression platform. The compression platform is located under the rubber tube. The lower end of the square bar is fixedly connected to the concave seat. A disc is screwed in the concave seat. The outer surface of the square bar between the constraint block and the concave seat is clamped with a spiral beryllium copper wire.

7. A ring main unit partial discharge detection device according to claim 6, characterized in that: The compression strength adjustment part includes two wedge blocks and two screw rods. A connection port is reserved in the middle of one side of the rotating rod. Two grooves are reserved on the upper end of one side of the rotating rod and are arranged along the central axis of the rotating rod. One side of the rotating rod is connected to a hoop tube, and the inside of the hoop tube is fixedly connected to two variable platforms. The two variable platforms and the two grooves are movably connected. The lower end of the two variable platforms is fixedly connected to a thread mouth tube in the middle of the connection port. Two screw rods are screwed into the connection port. The two screw rods are threadedly connected to the thread mouth tube. Three wedge blocks are fixedly connected to the outer circumference of the hoop tube at equal intervals. The tips of the three wedge blocks are arranged in the same direction as the tip of the wedge block one. The tips of the three wedge blocks increase in size from the inside to the outside. The upper end of one of the wedge blocks touches the lower end of the disc.

8. A ring main unit partial discharge detection device according to claim 1, characterized in that: The driving module also includes a liquid recovery unit, and the liquid recovery unit is installed on the side wall of the linkage piece; The liquid recovery unit includes a receiving plate and a liquid recovery and discharge part. The two sides of the linkage plate are fixedly connected to the receiving plate at the upper end of one side wall of the groove. The upper end of the receiving plate, which is farther from the groove, and the two ends of the upper end of the receiving plate are fixedly connected to protruding plates, and the lower ends of the two ends of the linkage plate are respectively provided with liquid recovery and discharge parts.

9. A ring main unit partial discharge detection device according to claim 1, characterized in that: The front end of the rectangular tube is screwed to the rotating rod, and a limit module 1 is installed on the upper end of the rotating rod. The limit module 1 includes a mounting groove 1 reserved on the side of the rectangular tube and an L-shaped rod fixedly connected to the side of the rectangular tube. A spiral beryllium copper wire 4 is fixedly connected in the mounting groove 1, and the other end of the spiral beryllium copper wire 4 is fixedly connected to a limit block 1. One end of the limit block 1 slides out of the mounting groove 1, and the limit block 1 and the L-shaped rod surround the outside of the rotating rod.

10. A ring main unit partial discharge detection device according to claim 1, characterized in that: The front end support module is screwed into the cavity at the lower end of the rectangular rod, and a limit module 2 is installed on the side of the front end support module. The limit module 2 reserves an installation groove 2 on the side wall of the cavity at the lower end of the rectangular rod. A spiral beryllium copper wire 5 is fixedly connected to the installation groove 2, and the other end of the spiral beryllium copper wire 5 is fixedly connected to the limit block 2, and the other end of the limit block 2 slides out of the installation groove 2.

Images