Extra-high voltage live working digital display screw device

Abstract

The application discloses a kind of extra-high voltage hot-line work digital display screw device, including screw base, screw body, main control motor and digital display screen.PZT piezoelectric ceramic is set on mounting plate below digital display screen, for responding to mechanical impact or vibration caused by abnormal discharge, sensing signal is transmitted to main control panel through shunt plate and female seat;Main control panel controls auxiliary motor to drive two insulation screen plates to move towards each other synchronously through driving gear, driven gear rotating in the same direction on both sides and sliding rack meshing on the opposite side of corresponding driven gear above and below respectively, forming insulation shielding.After insulation screen plate is in place, position sensor outputs signal and controls compression pump to start, so that high-purity quartz sand in sand storage tank is sprayed to discharge area through sand outlet nozzle, thereby forming sequential protection structure of abnormal discharge impact sensing, mechanical insulation barrier, in-place confirmation and sand blasting auxiliary suppression.

Description

Technical Field

[0001] This invention relates to the field of auxiliary equipment for ultra-high voltage live-line working, specifically to a digital display lead screw device for ultra-high voltage live-line working. Background Technology

[0002] With the application of ultra-high voltage transmission lines and large-scale power equipment, lead screw devices are needed to adjust the position of live equipment or adjacent working components during transmission line maintenance, conductor position adjustment, and related live-line work. To improve operational accuracy, existing lead screw devices typically use a motor to drive the lead screw, combined with a position display or digital display structure, allowing operators to monitor the lead screw's movement. Because these devices may operate near strong electric fields and high-potential environments, when partial discharge, arc development, or discharge impact occurs in the vicinity, the discharge process may be accompanied by transient disturbances such as mechanical impact and structural vibration. Therefore, the device's ability to detect abnormal states, its insulation protection capabilities, and the safety of electrical components under abnormal discharge conditions directly affect its reliable operation.

[0003] Existing live-line working equipment typically employs methods such as insulating casings, insulating rods, insulating mats, or maintaining safe distances to achieve basic insulation protection. For structures such as motor drives, position detection, and digital displays, motion control via low-voltage control circuits is also a common technique in this field. In power equipment, using insulating materials to block discharge paths, using quartz sand to absorb arc energy, and using sensors to detect component positions are all existing technical approaches. These structures can provide certain insulation, arc extinguishing, or status detection functions under their respective operating conditions.

[0004] However, for digital display lead screw devices equipped with motors, speed controllers, and digital display components, when partial discharge or arcing occurs in the peripheral environment and propagates towards the device surface, relying solely on the fixed insulating shell is insufficient to promptly alter the discharge propagation path. Furthermore, conventional protection structures typically cannot first utilize the transient mechanical impact or vibration caused by the discharge to trigger protection, then automatically form an additional mechanical insulation barrier, and further activate the auxiliary discharge suppression structure only after confirming the insulation barrier is in place. If abnormal discharge continues to act on the motor, display screen, and internal control circuitry, it may still lead to reduced insulation performance or damage to electrical components.

[0005] Therefore, it is necessary to set up a digital lead screw device that can quickly sense transient mechanical shocks or vibrations caused by abnormal discharges and sequentially link the insulation shielding structure and the auxiliary discharge suppression structure. Summary of the Invention

[0006] The purpose of this invention is to provide a digital display lead screw device for ultra-high voltage live-line working, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a digital display lead screw device for live-line work of ultra-high voltage power transmission, comprising a lead screw base, a slide rail at one end of the lead screw base, a slider slidably disposed on the outside of the slide rail, a slide seat at the top of the slider, the slide seat and the lead screw body forming a threaded transmission engagement, a speed controller body and a main control motor sequentially disposed at one end of the lead screw body, and a digital display screen disposed at the other end of the lead screw base; Below the digital display screen is a mounting plate, and the surface of the mounting plate is provided with multiple PZT piezoelectric ceramics. The PZT piezoelectric ceramics are used to respond to mechanical shocks or vibrations caused by abnormal discharge and output transient sensing signals. The signal output side of the PZT piezoelectric ceramics is connected to a shunt board, and the shunt board is electrically connected to the main control board located in the first insulating shell through connecting wires and a female connector. Two insulating shields that can move towards each other are provided on the outer side of the lead screw base. An auxiliary motor that is electrically connected to the control output terminal of the main control board is provided inside the second insulating shell. A drive gear is provided on the pivot end of the auxiliary motor. Driven gears are respectively engaged on both sides of the drive gear. The two driven gears rotate in the same direction and respectively engage sliding racks. The two sliding racks move in parallel directions. One of them engages on the upper side of the corresponding driven gear with the tooth surface facing down, and the other engages on the lower side of the other driven gear with the tooth surface facing up. The two sliding racks are respectively connected to the corresponding insulating shields through U-shaped guide rods and move synchronously in opposite directions under the drive of the auxiliary motor, so as to drive the two insulating shields to move towards the lead screw base. Position sensor bodies are respectively installed at one end of the two insulating shields facing each other. A third insulating shell is also installed on the insulating shield. A sand storage tank is installed outside the third insulating shell. The sand storage tank is filled with high-purity quartz sand. The sand storage tank is connected to a compression pump and a sand discharge nozzle. When the two insulating shields move to the preset blocking position, the two position sensor bodies output a shield positioning signal. The output end of the position sensor body is electrically connected to the control end of the compression pump so that the compression pump is started after the shield positioning signal is generated, so that the high-purity quartz sand is sprayed through the sand discharge nozzle to the discharge area outside the device.

[0008] Furthermore, the mounting plate has tightening holes on both sides, and M3 screws are threaded into the tightening holes. The shunt plate is fixedly mounted on the mounting plate by the M3 screws. The shunt plate has a comb-like structure, and the signal output terminals of multiple PZT piezoelectric ceramics are respectively connected to the corresponding conductive positions of the shunt plate.

[0009] Furthermore, the shunt plate is provided with connecting seats on both sides. The connecting seats are connected to the female seat through connecting lines. The female seat is connected to the signal input terminal of the main control board, which is used to collect and transmit the transient sensing signals generated by multiple PZT piezoelectric ceramics to the main control board.

[0010] Furthermore, the main control board has input protection, signal conditioning, and low-voltage logic output functions, which are used to limit, rectify, and level-convert the transient sensing signal transmitted by the shunt board, and output a low-voltage start signal to the main control chip of the main control board. The low-voltage start signal is used to control the start of the auxiliary motor.

[0011] Furthermore, the two driven gears are rotatably mounted in the second insulating housing via the main shaft, and the two sliding racks mesh on the upper and lower sides of the corresponding driven gears, respectively. The two meshing positions are located on opposite radial sides relative to their respective main shafts, and the two sliding racks move in mutually parallel tangential directions. The driving gear simultaneously drives the two driven gears to rotate in the same direction, so as to form a transmission structure in which the two sliding racks move synchronously in opposite directions driven by an auxiliary motor.

[0012] Furthermore, the sliding rack has a rectangular hollow structure inside, and a fixing block is set inside the rectangular hollow structure. The sliding rack can move relative to the fixing block through the rectangular hollow structure. A first spring is set at one end of the rectangular hollow structure. The fixing block is used to limit the moving direction and moving stroke of the sliding rack.

[0013] Furthermore, a U-shaped guide rod is connected to the side of the sliding rack away from the first spring, and the other end of the U-shaped guide rod is connected to the corresponding insulating screen plate; the two U-shaped guide rods move synchronously in the opposite direction with the corresponding sliding rack, so as to drive the two insulating screen plates closer to or away from the lead screw base respectively.

[0014] Furthermore, an auxiliary rod is connected to the side of the insulating screen away from the driving end of the U-shaped guide rod. The auxiliary rod passes through the limiting frame, and a second spring is sleeved on the outside of the auxiliary rod. A limiting ring is provided at the tail end of the auxiliary rod, and a fixing block is connected to the limiting ring. The fixing block is connected to the outer surface of the lead screw base so that the two ends of the insulating screen form a straight guide.

[0015] Furthermore, the two insulating panels are respectively provided with the position sensor bodies at their opposite ends, and the two position sensor bodies constitute a positioning detection structure; when the two insulating panels have not yet moved to the preset blocking position, a non-position signal is maintained, and when the two insulating panels move to the preset blocking position, a low-voltage panel positioning signal is output.

[0016] Furthermore, the low-voltage signal output terminal of the position sensor body is connected to the start control terminal of the compression pump, and the power input terminal of the compression pump is connected to a low-voltage power supply; the compression pump starts after receiving the low-voltage panel arrival signal, so as to push the high-purity quartz sand in the sand storage tank to be sprayed through the sand outlet nozzle to the discharge area outside the device.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention utilizes PZT piezoelectric ceramics, a shunt plate, a socket, and a main control board to form an abnormal discharge impact sensing and low-voltage linkage control structure. When partial discharge, arc impact, or structural vibration caused by discharge occurs around the device, the PZT piezoelectric ceramics generate a transient response signal. This signal is collected by the shunt plate and sent to the main control board. After input protection and signal conditioning, it is converted into a low-voltage logic signal that the main control chip can recognize, thus separating the sensing circuit from the power circuit of the auxiliary motor and improving the electrical safety of the protection triggering process.

[0018] 2. This invention uses an auxiliary motor, a driving gear, two driven gears on both sides, a sliding rack, a U-shaped guide rod, and an insulating screen to form a synchronous mechanical isolation mechanism. The two sliding racks mesh on opposite radial sides of the corresponding driven gears, converting the same-direction rotation of the two driven gears into synchronous opposite movement of the two sliding racks in parallel directions, so that the two insulating screens close synchronously towards each other. At the same time, the other end of the insulating screen forms a second guide point with the limiting frame through an auxiliary rod, thus taking into account both synchronization and anti-sway capability during rapid closing, so that the insulating screen can stably cover the lead screw base and the corresponding area susceptible to discharge.

[0019] 3. The present invention is equipped with a sequential discharge suppression structure consisting of a position sensor body, a sand storage tank, high-purity quartz sand, a compression pump, and a sand discharge nozzle. The compression pump is activated only after the insulating shields on both sides move to the preset shielding position and generate a shielding position signal. The high-purity quartz sand is sprayed towards the residual discharge area that may exist outside the device, thereby forming a sequential protection process of "first mechanical insulation barrier, then particle medium-assisted suppression". This reduces the possibility of sand spraying before the insulating shields are in place, which may interfere with the normal movement area. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the assembly structure of the insulating shield, PZT piezoelectric ceramic and sand storage arc suppression component of the present invention; Figure 3 This is a schematic diagram of the installation structure of the lead screw base, slide rail, slider, slide block and insulating screen plate of the present invention; Figure 4 for Figure 3 A partially enlarged schematic diagram of the gear and rack drive mechanism at point A in the middle; Figure 5 This is a schematic diagram of the main control motor, speed controller body, lead screw body, slide block and PZT piezoelectric ceramic mounting structure of the present invention; Figure 6 This is a schematic diagram of the mounting structure of the first insulating shell, main control board, female connector, second insulating shell, and auxiliary motor of the present invention. Figure 7 for Figure 6A partially enlarged schematic diagram of the sliding rack, U-shaped guide rod, and first spring at point B; Figure 8 for Figure 6 A partially enlarged structural diagram of the auxiliary rod, second spring, limiting frame, and limiting ring at point C.

[0021] In the picture: 1. Main control motor; 2. Slide block; 3. Digital display screen; 4. Insulating shield; 5. Third insulating shell; 6. Diverter plate; 7. PZT piezoelectric ceramic; 8. Sand discharge nozzle; 9. Mounting plate; 10. Sand storage tank; 11. High-purity quartz sand; 12. Position sensor body; 13. Slider; 14. Slide rail; 15. Drive gear; 16. U-shaped guide rod; 17. First spring; 18. Fixing block; 19. Rectangular hollow structure; 20. Sliding rack; 21. Driven gear; 22. Main shaft; 23. Compression pump; 24. Speed ​​controller body; 25. M3 screw; 26. Lead screw body; 27. Lead screw base; 28. Second insulating shell; 29. ​​Auxiliary motor; 30. Female seat; 31. Main control board; 32. First insulating shell; 33. Second spring; 34. Limit frame; 35. Fixing block; 36. Limit ring; 37. Auxiliary rod. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] The structural composition, design principle, electrical connection relationship, structural linkage relationship and working process of the present invention will be described below with reference to the accompanying drawings.

[0024] Example 1: like Figures 1 to 8 As shown, this embodiment provides a digital display lead screw device for ultra-high voltage live-line working, including a lead screw base 27. The lead screw base 27 serves as the main mechanical mounting base for each mechanism of the device. Slide rails 14 are respectively provided on both sides of one end of the base 27. A slider 13 is slidably mounted on the outer side of the slide rail 14. The top of the slider 13 is fixedly connected to the slide block 2, so that the slide block 2 can move linearly along the defined direction of the slide rail 14.

[0025] The slide 2 and the lead screw body 26 are connected by a threaded drive, a common method in lead screw transmission. One end of the lead screw body 26 is connected to the speed controller body 24, which is connected to the power output side of the main control motor 1. When the main control motor 1 is working, the rotational power generated by the main control motor 1 is transmitted to the lead screw body 26 via the speed controller body 24, and the rotation of the lead screw body 26 is converted into linear movement of the slide 2 along the slide rail 14.

[0026] The specific conventional drive connection, bearing support, and motor power supply method of the main control motor 1, speed controller body 24, and lead screw body 26 can adopt the mature connection structure in the existing lead screw actuator. This is not the focus of protection of this invention. Therefore, it is not necessary to label the ordinary wires, bearings, and fasteners one by one in the attached drawings.

[0027] A digital display screen 3 is installed at the other end of the lead screw base 27. The digital display screen 3 is used to display the operating data of the lead screw device. The digital display screen and its conventional low-voltage power supply and display control method are technologies that are already widely used in digital actuators. Therefore, this embodiment focuses on describing its positional relationship with the abnormal high-voltage protection mechanism, without repeating the description of the internal circuitry of the display screen.

[0028] Example 2: A mounting plate 9 is positioned directly below the digital display screen 3. The mounting plate 9 is used to fix the PZT piezoelectric ceramics 7. Multiple PZT piezoelectric ceramics 7 are disposed on the surface of the mounting plate 9.

[0029] The PZT piezoelectric ceramic 7 exhibits piezoelectric response characteristics. When partial discharge, arcing, or mechanical shock or structural vibration caused by discharge occurs outside the device, the PZT piezoelectric ceramic 7 on the mounting plate 9 is subjected to corresponding mechanical disturbances and generates an electrical response signal. In this embodiment, the PZT piezoelectric ceramic 7 is used to sense the mechanical shock or vibration caused by abnormal discharge, rather than directly measuring the UHV main circuit voltage or directly providing drive power to the auxiliary motor 29.

[0030] The mounting plate 9 has tightening holes on both sides, and an M3 screw 25 is screwed into each tightening hole. The M3 screw 25 can be used to adjust the tightness of the installation of related structures, and also to limit the installation position of the diverter plate 6.

[0031] The shunt board 6 is comb-shaped. Its purpose is to allow the output signals of multiple PZT piezoelectric ceramics 7 to be connected separately and then led out in a unified manner, so as to avoid the mess of connecting wires caused by all multiple sensing positions being directly connected to the main control board 31.

[0032] The two electrodes of the PZT piezoelectric ceramic 7 form a sensing signal output terminal, and the output wire corresponding to the detection signal is connected to the corresponding conductive branch of the shunt plate 6. The output signals of multiple PZT piezoelectric ceramics 7 are collected by the shunt plate 6 and led out by the connecting seats on both sides of the shunt plate 6 and the matching connecting wires. The other end of the connecting wire is plugged into the female connector 30.

[0033] The female connector 30 is electrically connected to the abnormal signal input terminal of the main control board 31 inside the first insulating shell 32.

[0034] It should be noted that the PZT piezoelectric ceramic 7, the shunt plate 6, and the busbar 30 form a sensing signal transmission circuit, and do not directly connect the UHV main circuit to the main control board 31.

[0035] The input side of the main control board 31 is equipped with input protection and signal conditioning circuits adapted to abnormal signal detection. The input protection, rectification, limiting, level conversion and isolation circuits are all common circuits used in the field of electronic control for sensor interface protection. They can be implemented using corresponding mature circuits according to the actual output range of the PZT piezoelectric ceramic 7, and do not need to be numbered as separate mechanical parts.

[0036] The electrical signal transmission relationship is as follows: PZT piezoelectric ceramic 7 output terminal, shunt board 6, adapter connection line, female connector 30, input protection terminal of main control board 31, signal conditioning terminal of main control board 31, low voltage logic terminal of main control board 31, and input terminal of main control chip.

[0037] After the above processing, the main control board 31 converts the anomaly detection signal into a low-voltage logic signal that the main control chip can recognize. In this embodiment, an approximately 3.3V logic high level can be generated as an anomaly trigger state.

[0038] The 3.3V signal mentioned here is only used for the logic identification and start-up control of the main control chip, and is not used to directly provide operating current to the auxiliary motor 29.

[0039] The auxiliary motor 29 is powered by the existing low-voltage power supply of the device, and the motor control output terminal of the main control board 31 is electrically connected to the control circuit of the auxiliary motor 29. When the main control chip detects an abnormal trigger signal, its control output terminal changes state, turning on the low-voltage power supply circuit of the auxiliary motor 29, thereby starting the auxiliary motor 29.

[0040] The auxiliary motor uses an independent low-voltage power supply and achieves motor on / off control through control elements. This is a mature technology in the field of motor control. Without changing the above signal input and control output relationship, the corresponding drive circuit can be configured according to the actual rated voltage of the motor.

[0041] Thus, the entire abnormal discharge sensing and linkage control process is formed: Abnormal discharge causes mechanical shock or structural vibration, PZT piezoelectric ceramic 7 generates transient sensing signal, shunt plate 6 collects, motherboard 30 transmits, main control board 31 performs input protection and signal conditioning, forms low voltage logic signal, main control chip judges, and auxiliary motor 29 starts.

[0042] This structure avoids directly introducing high-voltage electricity into the main control chip.

[0043] Example 3: A second insulating shell 28 is provided at one end of the first insulating shell 32. The second insulating shell 28 is used to insulate and shield the auxiliary motor 29 and its transmission mechanism.

[0044] The drive gear 15 is fixedly mounted on the pivot end of the auxiliary motor 29. Driven gears 21 are respectively provided on both sides of the drive gear 15. The drive gear 15 meshes externally with the driven gears 21 on both sides. Therefore, when viewed from the same axial direction, the rotation direction of the driven gears 21 on both sides is the same and opposite to the rotation direction of the drive gear 15.

[0045] The back sides of the two driven gears 21 are rotatably supported inside the second insulating housing 28 via the main shaft 22. The main shaft 22 is used to define the rotation center of the driven gears 21, so that the driven gears 21 only rotate without lateral displacement when receiving power from the driving gear 15.

[0046] The two sliding racks 20 move in parallel directions. One sliding rack 20 is positioned above the corresponding driven gear 21 with its tooth surface facing downwards, while the other sliding rack 20 is positioned below the other driven gear 21 with its tooth surface facing upwards. Both sliding racks 20 mesh with their respective driven gears 21. Here, "upper" and "lower" refer to their relative positions when viewed from the same axial direction. The meshing positions of the two gears and racks are located on opposite radial sides of their respective rotation centers. The two sliding racks 20 move tangentially along their corresponding meshing positions and are connected to their respective insulating shield plates 4 via their respective U-shaped guide rods 16.

[0047] Therefore, after the auxiliary motor 29 is started, the power transmission process is as follows: auxiliary motor 29, driving gear 15, driven gears 21 on both sides, sliding racks 20 on both sides, U-shaped guide rod 16, and insulating shield 4.

[0048] When the driving gear 15 rotates, it simultaneously drives the driven gears 21 on both sides to rotate in the same direction. Since the two sliding racks 20 mesh on the upper and lower sides of the corresponding driven gears 21 respectively, the tangential velocities at the two meshing positions are in opposite directions; the pitch circle linear velocity transmitted by the driving gear 15 through the driven gears 21 on both sides is the same, so the two sliding racks 20 move in opposite directions at the same speed along mutually parallel directions. When the auxiliary motor 29 rotates in the closed direction, the two sliding racks 20 drive the insulating shields 4 on both sides to move towards each other from both sides of the device toward the area where the lead screw base 27 is located via their respective U-shaped guide rods 16; when the auxiliary motor 29 rotates in the opposite direction, the insulating shields 4 on both sides move away from each other.

[0049] A rectangular hollow structure 19 is opened inside the sliding rack 20, and a fixing block 18 is set inside the rectangular hollow structure 19.

[0050] The fixed block 18 remains fixed relative to the lead screw base 27, while the sliding rack 20 can move along the outside of the fixed block 18 using the rectangular hollow structure 19. This structure limits the maximum travel of the sliding rack 20 and reduces the left-right swaying of the sliding rack 20 during operation.

[0051] A first spring 17 is installed at one end of the rectangular hollow structure 19.

[0052] When the auxiliary motor 29 drives the sliding rack 20 to move in the direction of closing the insulating screen, the first spring 17 generates elastic deformation and stores elastic potential energy; when the auxiliary motor 29 stops driving and releases the holding state, the first spring 17 can apply a reset force to the sliding rack 20 to assist the sliding rack 20 to return to the initial position.

[0053] A U-shaped guide rod 16 is provided on the other side of the sliding rack 20, and the movable end of the U-shaped guide rod 16 is connected to the insulating screen plate 4. Therefore, when the sliding rack 20 moves in a straight line, the U-shaped guide rod 16 moves synchronously and directly drives the insulating screen plate 4 to move closer to or away from the lead screw base 27.

[0054] The insulating shield 4 is made of insulating material that meets the insulation requirements of the corresponding operating environment. Its function is not to cut off the power source that generates high voltage, but to quickly change the discharge propagation conditions outside the device after detecting abnormal discharge, forming a further solid insulating barrier outside the lead screw base 27, the main control motor 1 and related electrical areas.

[0055] Therefore, in this embodiment, the insulation shield blocking high voltage should be understood as blocking or increasing the insulation impedance of the external abnormal discharge path, rather than stopping the external high voltage power supply from generating high potential.

[0056] Example 4: Since the insulating screen 4 is driven from one side by the U-shaped guide rod 16, if the drive support is only set on one side, the free end may swing or deviate during the rapid movement of the screen. Therefore, in this embodiment, an auxiliary rod 37 is set at the position of the insulating screen 4 near the other end.

[0057] One end of the auxiliary rod 37 is connected to the insulating screen plate 4, and the other end of the auxiliary rod 37 passes through the limiting frame 34.

[0058] The limiting frame 34 remains fixed relative to the lead screw base 27, thereby forming a linear guide structure for the auxiliary rod 37, enabling the auxiliary rod 37 to reciprocate along the direction defined by the limiting frame 34.

[0059] A second spring 33 is sleeved on the outside of the auxiliary rod 37.

[0060] A limiting ring 36 is provided at the tail end of the auxiliary rod 37 to prevent the auxiliary rod 37 from detaching from the limiting frame 34.

[0061] A fixing block 35 is provided on the surface of the limiting ring 36, and the bottom of the fixing block 35 is connected to the outer surface of the lead screw base 27.

[0062] When the U-shaped guide rod 16 drives the insulating screen plate 4 to move, the insulating screen plate 4 synchronously drives the auxiliary rod 37 to slide along the limiting frame 34. At this time, the second spring 33 undergoes elastic deformation as the auxiliary rod 37 moves.

[0063] Since the driving end of the insulating shield plate 4 is restricted by the U-shaped guide rod 16, while the other side is restricted by the auxiliary rod 37 and the limiting frame 34, two-point guidance can be formed, thereby reducing the probability of deflection and shaking when the insulating shield plate 4 moves rapidly.

[0064] After the abnormal protection state is released, the first spring 17 and the second spring 33 together provide elastic reset auxiliary force, so that the sliding rack 20, the U-shaped guide rod 16, the auxiliary rod 37 and the insulating screen 4 can return to the unobstructed state.

[0065] Example 5: A position sensor body 12 is installed at one end of the surface of the insulating shield plate 4.

[0066] With insulating shields 4 installed on both sides, position sensor bodies 12 are respectively installed at corresponding positions close to each other on the insulating shields 4 on both sides, and the two position sensor bodies 12 form a corresponding position detection relationship.

[0067] The position sensor body 12 can be a mature position detection element that can provide low-voltage switching output, and its specific form does not limit the mechanical linkage relationship of the present invention.

[0068] When the insulating shields 4 on both sides have not yet moved to the set position, the position sensor body 12 maintains a non-position signal.

[0069] When the two insulating shields 4 move toward each other to the set blocking position, an effective sensing state is formed between the two position sensor bodies 12, thereby outputting a shield positioning signal.

[0070] The position sensor body 12 uses a low-voltage power supply, and its signal output terminal is connected to the start control terminal of the compression pump 23.

[0071] The third insulating housing 5 is disposed on the side of the insulating shield 4 away from the position sensor body 12, such as Figure 2 As shown, the sand storage tank 10 is located on the outside of the third insulating shell 5 and is arranged separately from the third insulating shell 5. The sand storage tank 10 is not housed inside the third insulating shell 5.

[0072] The sand storage tank 10 is pre-filled with high-purity quartz sand 11.

[0073] The sand storage tank 10 is connected to the material pushing side of the compression pump 23. The compression pump 23 is used to provide a conveying action to push the high-purity quartz sand 11 toward the sand discharge nozzle 8 after startup. The sand discharge nozzle 8 is directed toward the screw base 27 and its surrounding predetermined discharge suppression area.

[0074] Therefore, its control relationship is as follows: The low-voltage power supply terminal of the position sensor body 12 is connected to the low-voltage power supply of the device. The output of the position sensor body 12 is connected to the control input of the compression pump 23; The power input terminal of the compressor pump 23 is connected to a corresponding low-voltage power supply; The output of the compression pump 23 is used to drive the high-purity quartz sand 11 in the sand storage tank 10 to the sand discharge nozzle 8; The sand discharge nozzle 8 is connected to the sand discharge path of the sand storage tank 10 and is directed toward the screw base 27 and its surrounding predetermined discharge suppression area.

[0075] It should be noted that the low-pressure signal output by the position sensor body 12 is a start control signal, and does not directly drive the compression pump 23 using the signal output power of the position sensor body 12 itself.

[0076] The actual operating current of the compressor pump 23 is provided by its low-voltage power supply circuit. The corresponding switch control circuit is turned on by the output signal of the position sensor body 12. This method of using low-power control signals to control a high-power actuator is a conventional implementation method in the field of electrical control.

[0077] After the compression pump 23 is started, it provides a conveying function for the high-purity quartz sand 11 in the sand storage tank 10, so that the high-purity quartz sand 11 enters the sand discharge nozzle 8 and is sprayed out from the sand discharge nozzle 8 toward the screw base 27 and the surrounding area where abnormal discharge may occur.

[0078] High-purity quartz sand 11 is not used as the main insulation bearing structure under normal operating conditions, but rather as an auxiliary discharge suppression medium after the insulation shield 4 has been moved into place.

[0079] Its design aims to first quickly form a physical insulating barrier using the insulating shield 4. After confirming that the shield is in place, high-purity quartz sand 11 is used to further cover and suppress the residual electric arc or continuous surface discharge area on the periphery, thus forming a sequential protection process of first mechanical barrier and then auxiliary arc suppression.

[0080] Example 6: When the device is in normal use, the main control motor 1 drives the lead screw body 26 to rotate through the speed controller body 24, which in turn drives the slide 2 to move along the slide rail 14, and the digital display screen 3 displays data related to the operation of the lead screw.

[0081] At this time, the insulating shields 4 on both sides are in their initial positions outside the lead screw base 27, and do not block the normal lead screw action area; the auxiliary motor 29 and the compression pump 23 are both in a non-protected start state.

[0082] When partial discharge, arc impact, or mechanical impact or structural vibration caused by discharge occurs around the device, the multiple PZT piezoelectric ceramics 7 installed on the mounting plate 9 are subjected to corresponding mechanical disturbances and generate transient responses.

[0083] The response signals are transmitted to the splitter plate 6 respectively.

[0084] The splitter board 6 concentrates and leads out the signals generated by multiple sensing locations, and transmits them to the main control board 31 via the connector, connecting line and motherboard 30.

[0085] The main control board 31 first processes the signal using the input protection and signal conditioning section, and then converts it into a 3.3V low-voltage logic state that the main control chip can recognize.

[0086] When the main control chip determines that the abnormal state meets the protection triggering conditions, its motor control output terminal sends a start signal to the control circuit of the auxiliary motor 29.

[0087] The auxiliary motor 29 then starts and drives the drive gear 15 to rotate.

[0088] The driving gear 15 synchronously drives the driven gears 21 on the left and right sides to rotate in the same direction. The two driven gears 21 mesh with the corresponding sliding racks 20 on the upper and lower sides respectively, so that the two sliding racks 20 move synchronously in opposite directions in parallel directions.

[0089] The sliding rack 20 slides along the direction defined by the fixed block 18 using the rectangular hollow structure 19, while simultaneously driving the U-shaped guide rod 16 to move.

[0090] The two U-shaped guide rods 16 respectively push the corresponding insulating shield 4 to move from both sides of the lead screw base 27 toward the central protection area.

[0091] While the insulating screen 4 moves, its other end simultaneously drives the auxiliary rod 37 to slide inside the limiting frame 34, so that both ends of the screen are guided in a straight line, avoiding significant swaying of the insulating screen 4 caused by pushing only one side with the U-shaped guide rod 16.

[0092] As the insulating shield 4 gradually approaches, a solid insulating shielding area is formed around the lead screw base 27 and its related electrical components to reduce the possibility that abnormal discharge from the periphery will continue to act directly on the main body of the device along the original air path.

[0093] When the insulating shields 4 on both sides reach the predetermined position, the two position sensor bodies 12 form a corresponding position detection state.

[0094] The position sensor body 12 outputs a low-voltage position signal.

[0095] The low-voltage arrival signal is transmitted to the start control terminal of the compressor pump 23, which turns on the low-voltage power supply control circuit of the compressor pump 23.

[0096] After the compression pump 23 starts working, it transports the high-purity quartz sand 11 in the sand storage tank 10 to the sand outlet nozzle 8. The high-purity quartz sand 11 is sprayed from the sand outlet nozzle 8 to the residual discharge area that may exist outside the device.

[0097] This leads to: The first stage involves PZT piezoelectric ceramic 7 sensing the mechanical impact or structural vibration caused by abnormal discharge. The second stage is when the main control board 31 converts the abnormal perception state into a safe low-voltage logic control signal. The third stage involves the auxiliary motor 29 driving the insulating shield 4 to quickly form a mechanical insulation barrier. The fourth stage involves the position sensor body 12 confirming that the insulating shield 4 is in place; The fifth stage involves starting the compression pump 23, which sprays high-purity quartz sand 11 through the sand outlet nozzle 8 to assist in suppressing residual abnormal discharge.

[0098] After the abnormal state is cleared, the auxiliary motor 29 stops holding or performs a reverse action according to the control program. The first spring 17 provides a reset assist force to the sliding rack 20, and the second spring 33 provides a reset assist force to the auxiliary rod 37 and the insulating screen plate 4, so that the insulating screen plate 4 gradually returns to its initial position.

[0099] It should be emphasized that the insulating shield 4 and high-purity quartz sand 11 in this device are mainly used to form additional insulation barriers and assist in suppressing abnormal discharges. They do not replace the insulation design, live-line working safety distance and special protection equipment set by the UHV system itself according to the corresponding voltage level.

[0100] The focus of this invention is the sequential linkage between the abnormal discharge impact sensing structure, the rapid mechanical isolation structure in which the insulating screens on both sides move toward each other synchronously driven by a single auxiliary motor, the screen positioning detection structure, and the quartz sand-assisted suppression structure.

[0101] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A digital display lead screw device for live-line working of ultra-high voltage power transmission, comprising a lead screw base (27), a slide rail (14), a slider (13), a slide block (2), a lead screw body (26), a speed controller body (24), a main control motor (1), and a digital display screen (3), wherein the slider (13) slides along the slide rail (14), and the slide block (2) is threadedly engaged with the lead screw body (26), characterized in that: A mounting plate (9) is set below the digital display screen (3). Multiple PZT piezoelectric ceramics (7) are set on the mounting plate (9). The PZT piezoelectric ceramics (7) are used to respond to mechanical shocks or vibrations caused by abnormal discharge. Their signal output side is electrically connected to the main control board (31) inside the first insulating shell (32) via the shunt plate (6) and the female socket (30). Two insulating screens (4) that can move in opposite directions are provided on the outside of the lead screw base (27). An auxiliary motor (29) is provided inside the second insulating shell (28). An active gear (15) is provided at the pivot end of the auxiliary motor (29). The active gear (15) meshes with driven gears (21) on both sides. The two driven gears (21) rotate in the same direction and mesh with sliding racks (20) respectively. The two sliding racks (20) move in parallel directions. One of them meshes with the upper side of the corresponding driven gear (21) with the tooth surface facing down, and the other meshes with the lower side of the other driven gear (21) with the tooth surface facing up. The two sliding racks (20) are connected to the corresponding insulating screens (4) via U-shaped guide rods (16) and move synchronously in opposite directions. Position sensor bodies (12) are respectively installed at one end of the two insulating screens (4) facing each other. A third insulating shell (5) is installed on the insulating screen (4). A sand storage tank (10) containing high-purity quartz sand (11) is installed on the outside of the third insulating shell (5). The sand storage tank (10) is connected to a compression pump (23) and a sand discharge nozzle (8). When the insulating screen (4) moves to the preset blocking position, the position sensor body (12) outputs a screen position signal and controls the compression pump (23) to start.

2. The digital display lead screw device for ultra-high voltage live-line working according to claim 1, characterized in that: The mounting plate (9) has tightening holes on both sides, and M3 screws (25) are threaded into the tightening holes. The shunt plate (6) is installed on the mounting plate (9) by limiting the M3 screws (25). The shunt plate (6) has a comb-like structure, and the signal output terminals of multiple PZT piezoelectric ceramics (7) are respectively connected to the corresponding conductive positions of the shunt plate (6).

3. The digital display lead screw device for ultra-high voltage live-line working according to claim 2, characterized in that: The shunt plate (6) is provided with connecting seats on both sides. The connecting seats are connected to the female seat (30) through connecting lines. The female seat (30) is connected to the signal input terminal of the main control board (31) to collect and transmit the transient sensing signals generated by multiple PZT piezoelectric ceramics (7) to the main control board (31).

4. The digital display lead screw device for ultra-high voltage live-line working according to claim 3, characterized in that: The main control board (31) has input protection, signal conditioning and low-voltage logic output functions. It is used to limit, rectify and level-convert the transient sensing signal transmitted by the shunt board (6), and output a low-voltage start signal to the main control chip of the main control board (31). The low-voltage start signal is used to control the start of the auxiliary motor (29).

5. The digital display lead screw device for ultra-high voltage live-line working according to claim 1, characterized in that: Two driven gears (21) are rotatably mounted in the second insulating housing (28) via the main shaft (22). Two sliding racks (20) mesh on the upper and lower sides of the corresponding driven gears (21), respectively. The two meshing positions are located on opposite radial sides relative to their respective main shafts (22). The two sliding racks (20) move in mutually parallel tangential directions. The driving gear (15) simultaneously drives the two driven gears (21) to rotate in the same direction, so as to form a transmission structure in which the two sliding racks (20) are driven to move synchronously in opposite directions by an auxiliary motor (29).

6. A digital display lead screw device for ultra-high voltage live-line working according to claim 5, characterized in that: The sliding rack (20) has a rectangular hollow structure (19) inside, and a fixing block (18) is provided inside the rectangular hollow structure (19). The sliding rack (20) can move relative to the fixing block (18) through the rectangular hollow structure (19). A first spring (17) is provided at one end of the rectangular hollow structure (19). The fixing block (18) is used to limit the moving direction and moving stroke of the sliding rack (20).

7. A digital display lead screw device for ultra-high voltage live-line working according to claim 6, characterized in that: The sliding rack (20) is connected to a U-shaped guide rod (16) on the side away from the first spring (17), and the other end of the U-shaped guide rod (16) is connected to the corresponding insulating screen plate (4); the two U-shaped guide rods (16) move synchronously in the opposite direction with the corresponding sliding rack (20) to drive the two insulating screen plates (4) to approach or move away from the screw base (27) respectively.

8. A digital display lead screw device for ultra-high voltage live-line working according to claim 7, characterized in that: An auxiliary rod (37) is connected to the side of the insulating screen plate (4) away from the driving end of the U-shaped guide rod (16). The auxiliary rod (37) passes through the limiting frame (34). A second spring (33) is sleeved on the outside of the auxiliary rod (37). A limiting ring (36) is provided at the tail end of the auxiliary rod (37). A fixing block (35) is connected to the limiting ring (36). The fixing block (35) is connected to the outer surface of the lead screw base (27) so that the two ends of the insulating screen plate (4) form a straight guide.

9. A digital display lead screw device for ultra-high voltage live-line working according to claim 1, characterized in that: The two insulating shields (4) are respectively provided with the position sensor body (12) at one end facing each other, and the two position sensor bodies (12) constitute the position detection structure; when the two insulating shields (4) have not moved to the preset blocking position, the non-position signal is maintained, and when the two insulating shields (4) move to the preset blocking position, the low voltage shield position signal is output.

10. A digital display lead screw device for ultra-high voltage live-line working according to claim 9, characterized in that: The low-voltage signal output terminal of the position sensor body (12) is connected to the start control terminal of the compression pump (23), and the power input terminal of the compression pump (23) is connected to the low-voltage working power supply. After receiving the low-voltage screen plate position signal, the compression pump (23) starts to push the high-purity quartz sand (11) in the sand storage tank (10) to be sprayed through the sand outlet nozzle (8) to the discharge area outside the device.

Images