A multi-dimensional lightning protection device based on zinc oxide nonlinear material

Abstract

The present invention relates to the technical field of lightning arresters, and in particular to a multi-dimensional protective lightning arrester based on zinc oxide nonlinear material, comprising a silicone rubber sleeve, an end cover and a bottom cover, wherein the end cover and the bottom cover are fixedly connected to the upper and lower ends of the silicone rubber sleeve, respectively, an upper wiring terminal is fixedly connected to the end cover, and a lower wiring terminal is fixedly connected to the bottom cover, a plurality of resistance valve plates are arranged inside the silicone rubber sleeve, and a first spring is arranged between the end cover and the uppermost resistance valve plate; the present invention increases the pressure relief channel inside the single-way tube and improves the pressure relief speed, thereby increasing the pressure relief channel and the pressure relief speed when the air pressure is abnormal, preventing the silicone rubber sleeve from exploding, and moving the cutter along the inside of the limit shell into the outer sleeve to cut the power line, thereby quickly cutting off the fault section resistance plate circuit and avoiding the continuous expansion of the loss.

Description

Technical Field

[0001] The present invention relates to the technical field of lightning arresters, and in particular to a multi-dimensional lightning protection device based on zinc oxide nonlinear material. Background Art

[0002] Zinc oxide surge arresters (MOA) are critical overvoltage protection devices in power systems. Their core function is to suppress abnormal voltages through their nonlinear volt-ampere characteristics, ensuring equipment safety. Their advantages lie in their compact structure, maintenance-free design, high current capacity, and long lifespan. They are widely used in substations, transmission lines, and precision equipment protection, significantly improving power systems' surge resistance and power supply reliability. They are the preferred solution for modern power overvoltage protection.

[0003] The patent document with publication number CN119673597A discloses a zinc oxide lightning arrester and substation, which relates to the technical field of lightning arresters. It includes a silicone rubber jacket, a plurality of umbrella skirts fixed on the outer peripheral surface of the silicone rubber jacket, and sealing hardware for sealing the openings at both ends of the silicone rubber jacket. The interior of the silicone rubber jacket is provided with a plurality of resistance valve plates; the interior of the silicone rubber jacket is provided with an insulating sleeve mounted on the outside of the resistance valve plates, and a rainproof cap made of silicone rubber is mounted on the outer periphery of one end of the silicone rubber jacket, and the inner wall of the rainproof cap is tightly pressed against the outer peripheral surface of the silicone rubber jacket.

[0004] Zinc oxide lightning arresters need to be sealed during operation to prevent them from getting damp and affecting their performance. However, when the zinc oxide lightning arrester is struck by lightning, the zinc oxide resistor will experience instantaneous high temperature, causing the material to decompose and generate gas, which will cause a sudden increase in pressure inside the sealed structure. In addition, due to the large current passing through the resistor, Joule heat is generated, causing the internal pressure of the zinc oxide lightning arrester to be too high, thereby increasing the probability of the zinc oxide lightning arrester shell bursting. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a multi-dimensional lightning protection device based on zinc oxide nonlinear material.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a multi-dimensional lightning protection device based on zinc oxide nonlinear material, comprising a silicone rubber sleeve, an end cover and a bottom cover, wherein the end cover and the bottom cover are fixedly connected to the upper and lower ends of the silicone rubber sleeve, respectively, the end cover is fixedly connected to the upper terminal, and the bottom cover is fixedly connected to the lower terminal;

[0007] A plurality of resistance valve sheets are arranged inside the silicone rubber sleeve, a first spring is arranged between the end cover and the uppermost resistance valve sheet, a limiting ring is arranged on the top of the end cover, a plurality of single-way tubes are fixedly inserted on the limiting ring along the circumferential direction, the open ends of the bottom of the plurality of single-way tubes all pass through the end cover and extend to the bottom of the end cover and are fixedly inserted with a movable ring, the surface of the single-way tubes is sleeved with a second spring, and the second spring is fixedly connected between the movable ring and the end cover;

[0008] The top of the single-way tube is fixedly connected to the first exhaust pipe, and the first exhaust pipe is fixedly installed with a pressure relief valve, and the surface of the single-way tube is slidably sleeved with a sealing ring, and the sealing ring is fixedly connected to the end cover, and the sealing ring and one side of the single-way tube are respectively provided with a first communicating groove and a second communicating groove, and the second communicating groove is located below the first communicating groove, and the top of the end cover is fixedly connected to a fixing ring, and a plurality of limit strips are fixedly connected to the fixing ring, one end of the limit strips are all located at the top of the limit ring, and a notch is provided at the bottom of the limit strip, and an outer sleeve is fixedly connected to the top of the end cover, and the bottom of the outer sleeve is fixedly connected to the limit shell, and the top of the limit ring is fixedly connected to a cutter, and the cutting end of the cutter is located inside the limit shell.

[0009] Preferably, the inner sleeve is slidably connected to the inside of the outer sleeve, and the surface of the inner sleeve is fixedly connected to two mounting blocks along the circumferential direction, and one side of the mounting block is fixedly connected to a limit pin, and the surface of the outer sleeve is fixedly connected to two mounting rings along the circumferential direction, and the limit pins are slidably inserted into the corresponding mounting rings, and a third spring is sleeved on the limit pin, and the third spring is fixedly connected between the corresponding mounting block and the mounting ring, and the tops of the outer sleeve and the inner sleeve are threadedly connected with positioning bolts.

[0010] Preferably, an annular sealant is bonded to the ends of the outer sleeve and the inner sleeve that are away from each other.

[0011] Preferably, a second exhaust pipe is fixedly connected to the interior of the first communicating groove, and a one-way valve is fixedly installed on the second exhaust pipe.

[0012] Preferably, a first spiral groove is provided on the silicone rubber sleeve, a spiral ventilation pipe is arranged inside the first spiral groove, a second spiral groove is provided on the inner wall of the silicone rubber sleeve, a plurality of connecting holes are provided on the second spiral groove, the connecting holes are all connected to the first spiral groove, the end cover and the bottom cover are respectively fixedly connected with an air outlet pipe and an air inlet pipe, the air inlet pipe is connected to a ventilation and air intake mechanism, the air outlet pipe and the air inlet pipe are respectively located at the upper and lower ends of the spiral ventilation pipe, the end cover is fixedly connected with a casting pipe, the casting pipe is located at the top of the second spiral groove, the bottom of the end cover is fixedly connected with a retaining ring, the retaining ring is in sliding contact with the inner wall of the silicone rubber sleeve.

[0013] Preferably, the ventilation and air intake mechanism includes a fan, the fan is fixedly mounted on the bottom cover, and one end of the air inlet pipe is fixedly connected to the fan.

[0014] Preferably, thread grooves are provided at both ends of the silicone rubber sleeve, and the end cover and the bottom cover are respectively threadedly connected to the corresponding thread grooves.

[0015] Preferably, an annular sealing strip is fixedly connected to the inside of the end cover and the bottom cover, and the annular sealing strip is located between the first spiral groove and the second spiral groove.

[0016] Preferably, a plurality of silicone rubber sheds are fixedly connected to the surface of the silicone rubber sleeve, and the silicone rubber sheds are all inclined downward.

[0017] Preferably, the fixing ring and the end cover are fixed by connecting bolts.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. Apply pressure to the single-way tube through the action of air pressure, thereby applying a vertical upward force to the limit ring, and the limit ring squeezes the limit strip, causing multiple limit strips to break along the notch, thereby releasing the limit strip's limiting effect on the top of the limit ring, and causing multiple single-way tubes to move upward along the sliding plug-in part of the end cover, and driving the limit ring to move upward synchronously. When the single-way tube moves upward along the inside of the sealing ring, the second connecting groove moves upward and is connected to the first connecting groove, thereby increasing the pressure relief channel inside the single-way tube and increasing the pressure relief speed, thereby increasing the pressure relief channel and pressure relief speed when the air pressure is abnormal, and preventing the silicone rubber sleeve from exploding.

[0020] 2. By passing one end of the power cord through the inside of the outer sleeve and fixing it on the surface of the upper terminal, when the single-way tube moves upward under the action of high voltage, the limit ring drives the cutter to move upward synchronously, so that the cutter moves along the inside of the limit shell into the outer sleeve and cuts the power cord, thereby quickly cutting off the fault section resistor circuit and avoiding the continued expansion of losses.

[0021] 3. The power cords inside the inner sleeve and the outer sleeve are in a taut and straightened state. When the cutter moves along the inside of the limit shell into the outer sleeve and cuts the power cord, the third spring stretches outward through elastic action, thereby causing the inner sleeve and the outer sleeve to move away from each other, and through the positioning action of the positioning bolt, the power cords are moved away from each other along the fracture, thereby preventing the fracture of the power cord from contacting and continuing to be in a circuit-on state, thereby improving the safety after the circuit is cut off, and through the inner sleeve and the outer sleeve limiting the two ends of the power cord fracture, the power cord fracture is located in the inner sleeve and the outer sleeve, thereby preventing rainwater from contacting the power cord fracture and causing a short circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 For the present invention Figure 1 A schematic diagram of the structure enlargement at point A;

[0024] Figure 3 For the present invention Figure 2 A magnified schematic diagram of the structure at point B in FIG.

[0025] Figure 4 It is a schematic diagram of the cross-sectional structure of the present invention;

[0026] Figure 5 For the present invention Figure 4 A magnified schematic diagram of the structure at position C in FIG;

[0027] Figure 6 Schematic diagram of the structure of the silicone rubber sleeve of the present invention;

[0028] Figure 7 This is a schematic diagram of the cross-sectional structure of the silicone rubber sleeve ring of the present invention;

[0029] Figure 8 Schematic diagram of the matching structure of the silicone rubber sleeve and the spiral ventilation pipe of the present invention (the silicone rubber sleeve is cut into an annular plane);

[0030] Figure 9 This is a schematic diagram of the matching structure of the end cover and the single-pass pipe of the present invention;

[0031] Figure 10 For the present invention Figure 9 A magnified schematic diagram of the structure at D in FIG.

[0032] Figure 11 For the present invention Figure 9 A schematic diagram of the structure at E in FIG.

[0033] Figure 12Schematic diagram of the matching structure of the one-way pipe and the sealing ring of the present invention (the sealing ring is cut away);

[0034] Figure 13 For the present invention Figure 12 A magnified schematic diagram of the structure at F in FIG.

[0035] Figure 14 This is a schematic diagram of the bottom cover structure of the present invention;

[0036] Figure 15 Schematic diagram of the cross-sectional structure of the silicone rubber sleeve of the present invention;

[0037] Figure 16 For the present invention Figure 15 Schematic diagram of the enlarged structure at G in FIG.

[0038] Figure: 1, silicone rubber sleeve; 2, end cap; 3, bottom cap; 4, upper terminal; 5, lower terminal; 6, resistor valve plate; 7, first spring; 8, limit ring; 9, one-way pipe; 10, movable ring; 11, second spring; 12, first exhaust pipe; 13, pressure relief valve; 14, sealing ring; 15, first connecting groove; 16, second connecting groove; 17, fixing ring; 18, limit strip; 19, notch; 20, outer sleeve; 21, limit housing; 22, cutter; 23, inner sleeve Cylinder; 24. Mounting block; 25. Limit pin; 26. Mounting ring; 27. Third spring; 28. Positioning bolt; 29. ​​Annular sealant; 30. Second exhaust pipe; 31. One-way valve; 32. First spiral groove; 33. Spiral ventilation pipe; 34. Second spiral groove; 35. Connecting hole; 36. Outlet pipe; 37. Inlet pipe; 38. Casting pipe; 39. Retaining ring; 40. Fan; 41. Threaded groove; 42. Annular sealing strip; 43. Silicone rubber umbrella skirt; 44. Connecting bolt. DETAILED DESCRIPTION

[0039] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0040] like Figures 1 to 16 The multi-dimensional lightning protection device based on zinc oxide nonlinear material shown in the figure includes a silicone rubber sleeve 1, an end cover 2 and a bottom cover 3. The end cover 2 and the bottom cover 3 are fixedly connected to the upper and lower ends of the silicone rubber sleeve 1 respectively. The end cover 2 is fixedly connected to the upper terminal 4, and the bottom cover 3 is fixedly connected to the lower terminal 5.

[0041] The interior of the silicone rubber sleeve 1 is provided with a plurality of resistance valve sheets 6 (such as Figure 4As shown in FIG1 ), a first spring 7 is provided between the end cover 2 and the uppermost resistor valve plate 6, a limiting ring 8 is provided on the top of the end cover 2, and a plurality of single-way tubes 9 are fixedly inserted along the circumferential direction on the limiting ring 8. The open ends of the bottoms of the plurality of single-way tubes 9 all pass through the end cover 2 and extend to the bottom of the end cover 2 and are fixedly inserted with a movable ring 10. The surfaces of the single-way tubes 9 are all sleeved with a second spring 11 (as shown in FIG1 ). Figure 10 As shown), the second spring 11 is fixedly connected between the movable ring 10 and the end cover 2;

[0042] The top of the single-way pipe 9 is fixedly connected to the first exhaust pipe 12, and a pressure relief valve 13 is fixedly installed on the first exhaust pipe 12. The surface of the single-way pipe 9 is slidably sleeved with a sealing ring 14, which is fixedly connected to the end cover 2. The sealing ring 14 and one side of the single-way pipe 9 are respectively provided with a first connecting groove 15 and a second connecting groove 16 (such as Figure 13 As shown, the second communicating groove 16 is located below the first communicating groove 15, and a fixing ring 17 is fixedly connected to the top of the end cover 2 (as shown in FIG. Figure 2As shown in the figure), a plurality of limit strips 18 are fixedly connected to the fixing ring 17, one end of the limit strips 18 are located at the top of the limit ring 8, and a notch 19 is provided at the bottom of the limit strip 18. An outer sleeve 20 is fixedly connected to the top of the end cover 2, and the bottom of the outer sleeve 20 is fixedly connected to the limit shell 21. A cutter 22 is fixedly connected to the top of the limit ring 8, and the cutting end of the cutter 22 is located inside the limit shell 21; when working, the zinc oxide lightning arrester needs to be sealed during work to prevent the zinc oxide lightning arrester from getting damp and affecting its performance. However, when the zinc oxide lightning arrester is struck by lightning, the zinc oxide resistor is struck by lightning and the instantaneous high temperature causes the material to decompose, generating gas, thereby causing a sudden increase in pressure in the sealing structure, and due to the large current passing through the resistor to generate Joule heat, the internal pressure of the zinc oxide lightning arrester is too high, thereby increasing the probability of the zinc oxide lightning arrester shell bursting; this technical solution can solve the above problems, specifically The working method is as follows: the upper and lower ends of the silicone rubber sleeve 1 are fixedly sealed by the end cover 2 and the bottom cover 3, so that the multiple resistor valve plates 6 are sealed and limited inside the silicone rubber sleeve 1, and the multiple resistor valve plates 6 are elastically pressed by the elastic extension of the first spring 7 to ensure close contact between the resistor valve plates 6 and prevent poor contact and other phenomena when the resistor valve plates 6 are working. The power line is connected to the upper terminal 4 and the lower terminal 5 is grounded. The multiple resistor valve plates 6 are struck by lightning and instantly cause high temperature and high pressure to be generated inside the silicone rubber sleeve 1. When the pressure reaches 0.5MPa, the high-pressure gas is guided by one end of the single-way tube 9 located inside the silicone rubber sleeve 1, so that the gas moves along the inside of the single-way tube 9 to the first exhaust pipe 12, and the gas is discharged and depressurized by the pressure relief valve 13, thereby releasing the internal gas of the silicone rubber sleeve 1. When the pressure exceeds 1.When the pressure is 2 MPa, the pressure relief effect of the pressure relief valve 13 cannot release the internal air pressure in time, and the air pressure exerts pressure on the one-way tube 9, thereby exerting a vertical upward force on the limit ring 8, and the limit ring 8 squeezes the limit strip 18, so that multiple limit strips 18 break along the notch 19, thereby releasing the limiting effect of the limit strip 18 on the top of the limit ring 8, and making multiple one-way tubes 9 move upward along the sliding plug-in part of the end cover 2, and drive the limit ring 8 to move upward synchronously. When the one-way tube 9 moves upward along the inside of the sealing ring 14, the second connecting groove 16 moves upward and is connected with the first connecting groove 15, thereby increasing the pressure relief channel inside the one-way tube 9 and increasing the pressure relief speed, thereby increasing the pressure relief channel and pressure relief speed when the air pressure is abnormal, preventing the silicone rubber sleeve from When the sleeve 1 explodes, and as the single-way tube 9 moves upward, the movable ring 10 limits the bottom of the single-way tube 9, preventing it from detaching from the end cap 2. During its movement, the movable ring 10 squeezes the second spring 11, causing compression deformation. As the air pressure inside the silicone rubber sleeve 1 returns to normal, the single-way tube 9 moves downward and returns to its initial position. When connecting the power cord to the upper terminal 4, one end of the power cord is passed through the interior of the outer sleeve 20 and secured to the surface of the upper terminal 4. As the single-way tube 9 moves upward under the action of high pressure, the limiting ring 8 drives the cutter 22 to move upward synchronously, causing it to move along the interior of the limiting housing 21 into the outer sleeve 20 and cut the power cord, thereby quickly severing the faulty resistor circuit and preventing further damage.

[0043] As a further embodiment of the present invention, the interior of the outer sleeve 20 is slidably connected to the inner sleeve 23, and the surface of the inner sleeve 23 is fixedly connected to two mounting blocks 24 along the circumferential direction. One side of the mounting block 24 is fixedly connected to a limit pin 25, and the surface of the outer sleeve 20 is fixedly connected to two mounting rings 26 along the circumferential direction. The limit pins 25 are slidably inserted into the corresponding mounting rings 26, and a third spring 27 is sleeved on the limit pin 25. The third spring 27 is fixedly connected between the corresponding mounting block 24 and the mounting ring 26, and the tops of the outer sleeve 20 and the inner sleeve 23 are threadedly connected with a positioning bolt 28; during operation, when connecting the power cord and the upper terminal 4, one end of the power cord is passed through the inner sleeve 23 and the outer sleeve 20 in turn and fixed on the upper terminal 4, and then the inner sleeve 23 is pressed toward the outer sleeve 20, so that the limit pin 25 moves along the sliding insertion of the mounting ring 26 and squeezes the third spring. 27 produces compression deformation, and then by rotating the positioning bolts 28, one end of the two positioning bolts 28 is squeezed and positioned with the outer surface of the power cord, so that under the elastic extension action of the third spring 27, the power cord inside the inner sleeve 23 and the outer sleeve 20 is in a taut and straight state. When the cutter 22 moves along the inside of the limit shell 21 into the outer sleeve 20 and cuts the power cord, the third spring 27 stretches outwards through elastic action, so that the inner sleeve 23 and the outer sleeve 20 are separated from each other, and the positioning action of the positioning bolts 28 is used to separate the power cords from each other along the fracture, thereby preventing the fracture of the power cord from contacting and continuing to be in a circuit-conducting state, thereby improving the safety after the circuit is cut off, and through the limiting of the two ends of the power cord fracture by the inner sleeve 23 and the outer sleeve 20, the fracture of the power cord is located between the inner sleeve 23 and the outer sleeve 20, thereby preventing rainwater from contacting the power cord fracture and causing a short circuit.

[0044] As a further implementation scheme of the present invention, the ends of the outer sleeve 20 and the inner sleeve 23 that are away from each other are both adhered with an annular sealant 29; during operation, after the power cord is fixed by the positioning bolts 28, the annular sealant 29 on the outer sleeve 20 and the inner sleeve 23 are pasted and wrapped around the surface of the power cord, thereby sealing the opening at one end of the outer sleeve 20 and the inner sleeve 23 that are away from each other, preventing rainwater from entering from the opening at one end of the outer sleeve 20 and the inner sleeve 23 that are away from each other after the power cord is cut, further reducing the probability of a short circuit.

[0045] As a further embodiment of the present invention, the interior of the first connecting groove 15 is fixedly connected to a second exhaust pipe 30, and a one-way valve 31 is fixedly installed on the second exhaust pipe 30; during operation, when the one-way pipe 9 moves upward and connects the second connecting groove 16 and the first connecting groove 15, high-pressure gas is discharged from the inside of the second exhaust pipe 30 to the outside, and the one-way valve 31 is installed to prevent rainwater from entering the interior of the one-way pipe 9, thereby ensuring the dryness and sealing degree of the environment at the resistance valve plate 6.

[0046] As a further embodiment of the present invention, the silicone rubber sleeve 1 is provided with a first spiral groove 32 (combined with Figure 15 and Figure 16 ), a spiral ventilation pipe 33 is provided inside the first spiral groove 32, a second spiral groove 34 is provided on the inner wall of the silicone rubber sleeve 1, a plurality of connecting holes 35 are provided on the second spiral groove 34, and the connecting holes 35 are all connected to the first spiral groove 32, and the end cover 2 and the bottom cover 3 are respectively fixedly connected with an air outlet pipe 36 and an air inlet pipe 37 (combined with Figure 11 and Figure 14 ), the air inlet pipe 37 is connected to a ventilation air intake mechanism, the air outlet pipe 36 and the air inlet pipe 37 are respectively located at the upper and lower ends of the spiral ventilation pipe 33, and the end cover 2 is fixedly connected with a pouring pipe 38, the pouring pipe 38 is located at the top of the second spiral groove 34, and the bottom of the end cover 2 is fixedly connected with a retaining ring 39, and the retaining ring 39 is in sliding contact with the inner wall of the silicone rubber sleeve 1; when working, the molten high thermal conductivity paraffin base is poured into the second spiral groove 34 along the pouring pipe 38, and the contact between the resistance valve plate 6 and the retaining ring 39 and the inner wall of the silicone rubber sleeve 1 causes the high thermal conductivity paraffin base to flow downward along the spiral trajectory of the second spiral groove 34 to fill, and in the process of flowing and filling, it contacts the surface of the resistance valve plate 6, and is filled in the corresponding connecting hole 35 in the process of flowing, thereby contacting the spiral ventilation pipe 33, and when the temperature of the high thermal conductivity paraffin base cools down It returns to a solid state, thereby filling the interior of the second spiral groove 34 with a solid state to ensure the sealing degree of the resistance valve plate 6, and then the air is allowed to enter the air inlet pipe 37 through the action of the ventilation air intake mechanism, and moves along the inside of the spiral ventilation pipe 33 and is finally discharged from the air outlet pipe 36. Therefore, when wind acts on the inside of the spiral ventilation pipe 33, the heat generated on the surface of the resistance valve plate 6 is conducted along the connecting hole 35 to the spiral ventilation pipe 33 through the contact heat conduction effect of the high thermal conductivity paraffin base, and the heat is dissipated along with the action of wind, thereby ensuring the heat dissipation effect of the resistance valve plate 6 in daily environment. When the resistance valve plate 6 is struck by lightning and instantly causes high temperature and high pressure to be generated inside the silicone rubber sleeve 1, the high thermal conductivity paraffin base melts under the action of high temperature and absorbs the heat of the silicone rubber sleeve 1 by phase change, thereby reducing the internal temperature of the silicone rubber sleeve 1.

[0047] As a further implementation scheme of the present invention, the ventilation and air intake mechanism includes a fan 40, which is fixedly mounted on the bottom cover 3, and one end of the air inlet pipe 37 is fixedly connected to the fan 40; when in operation, the fan 40 operates to continuously allow air to enter the air inlet pipe 37, and enter the spiral ventilation pipe 33 along the air inlet pipe 37, and then exhaust the air along the air outlet pipe 36, so that the spiral ventilation pipe 33 has a one-way wind flow.

[0048] As a further implementation scheme of the present invention, thread grooves 41 are provided at both ends of the silicone rubber sleeve 1, and the end cover 2 and the bottom cover 3 are respectively threadedly connected to the corresponding thread grooves 41; during operation, the end cover 2 and the bottom cover 3 are respectively threadedly connected through the thread grooves 41, thereby facilitating the disassembly and maintenance of the equipment and improving the convenience of maintenance.

[0049] As a further embodiment of the present invention, an annular sealing strip 42 is fixedly connected to the interior of the end cover 2 and the bottom cover 3, and the annular sealing strip 42 is located between the first spiral groove 32 and the second spiral groove 34; during operation, the sealing degree at both ends of the silicone rubber sleeve 1 is improved by the setting of the annular sealing strip 42, and the first spiral groove 32 and the second spiral groove 34 are separated by the annular sealing strip 42 to ensure that the ventilation and cooling of the spiral ventilation pipe 33 will not affect the sealing inside the silicone rubber sleeve 1.

[0050] As a further embodiment of the present invention, a plurality of silicone rubber sheds 43 (such as Figure 1 As shown), the silicone rubber sheds 43 are all tilted downward; during operation, by arranging multi-stage silicone rubber sheds 43 on the surface of the silicone rubber sleeve 1, the creepage distance is increased, and surface discharge in dirty and humid environments is prevented, thereby improving the adaptability to outdoor environments.

[0051] As a further embodiment of the present invention, the fixing ring 17 and the end cover 2 are connected by connecting bolts 44 (such as Figure 2 During operation, the fixing ring 17 is fixed to the end cover 2 by connecting the bolts 44. When the limiting strip 18 breaks along the notch 19 under high pressure, the staff can disassemble and replace the fixing ring 17 and the limiting strip 18, thereby reducing maintenance costs and improving the convenience of maintenance.

[0052] Working principle of the present invention:

[0053] The upper and lower ends of the silicone rubber sleeve 1 are fixedly sealed by the end cover 2 and the bottom cover 3, so that the multiple resistor valve plates 6 are sealed and limited inside the silicone rubber sleeve 1, and the multiple resistor valve plates 6 are elastically pressed by the elastic extension of the first spring 7 to ensure close contact between the resistor valve plates 6 and prevent poor contact and other phenomena when the resistor valve plates 6 are working. The power line is connected to the upper terminal 4 and the lower terminal 5 is grounded. The multiple resistor valve plates 6 are struck by lightning and instantly cause high temperature and high pressure to be generated inside the silicone rubber sleeve 1. When the pressure reaches 0.5MPa, the high-pressure gas is guided by one end of the single-way tube 9 located inside the silicone rubber sleeve 1, so that the gas moves along the inside of the single-way tube 9 to the first exhaust pipe 12, and the gas is depressurized and discharged by the action of the pressure relief valve 13, thereby releasing the internal gas of the silicone rubber sleeve 1. When the pressure exceeds 1.2 MPa, the pressure relief effect of the pressure relief valve 13 cannot release the internal air pressure in time, and the air pressure exerts pressure on the one-way tube 9, thereby exerting a vertical upward force on the limit ring 8, and the limit ring 8 squeezes the limit strip 18, so that multiple limit strips 18 break along the notch 19, thereby releasing the limiting effect of the limit strip 18 on the top of the limit ring 8, and making multiple one-way tubes 9 move upward along the sliding plug-in part of the end cover 2, and drive the limit ring 8 to move upward synchronously. When the one-way tube 9 moves upward along the inside of the sealing ring 14, the second connecting groove 16 moves upward and is connected with the first connecting groove 15, thereby increasing the pressure relief channel inside the one-way tube 9 and increasing the pressure relief speed, thereby increasing the pressure relief channel and pressure relief speed when the air pressure is abnormal, preventing the silicone rubber sleeve from The tube 1 explodes, and when the single-way tube 9 moves upward, the bottom of the single-way tube 9 is limited by the movable ring 10 to prevent the single-way tube 9 from detaching from the end cover 2, and the second spring 11 is squeezed to produce compression deformation during the movement of the movable ring 10, so that after the air pressure inside the silicone rubber sleeve 1 returns to normal, the single-way tube 9 moves downward and returns to the initial position. When connecting the power cord and the upper terminal 4, one end of the power cord is passed through the outer sleeve 20 and fixed on the surface of the upper terminal 4. When the single-way tube 9 moves upward under the action of high pressure, the limiting ring 8 drives the cutter 22 to move upward synchronously, so that the cutter 22 moves along the inside of the limiting shell 21 into the outer sleeve 20, and cuts the power cord, thereby quickly cutting off the fault section resistor circuit to avoid continued expansion of losses.

[0054] The basic principles, main features and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only illustrate the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention as claimed, and the scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-dimensional lightning protection device based on zinc oxide nonlinear material, comprising a silicone rubber sleeve, an end cover and a bottom cover, characterized in that: The end cover and the bottom cover are fixedly connected to the upper and lower ends of the silicone rubber sleeve respectively, the end cover is fixedly connected to the upper wiring terminal, and the bottom cover is fixedly connected to the lower wiring terminal; A plurality of resistance valve sheets are arranged inside the silicone rubber sleeve, a first spring is arranged between the end cover and the uppermost resistance valve sheet, a limit ring is arranged on the top of the end cover, a plurality of single-way tubes are fixedly inserted circumferentially on the limit ring, the open ends of the bottom of the plurality of single-way tubes all pass through the end cover and extend to the bottom of the end cover and are fixedly inserted with a movable ring, the surface of the single-way tubes is sleeved with a second spring, and the second spring is fixedly connected between the movable ring and the end cover; The top of the one-way pipe is fixedly connected to the first exhaust pipe, and the first exhaust pipe is fixedly installed with a pressure relief valve. The surface of the one-way pipe is slidably sleeved with a sealing ring, which is fixedly connected to the end cover. A first communicating groove and a second communicating groove are respectively provided on one side of the sealing ring and the one-way pipe. The second communicating groove is located below the first communicating groove. The top of the end cover is fixedly connected to a fixing ring, and a plurality of limiting strips are fixedly connected to the fixing ring. One end of the limiting strips is located at the top of the limiting ring, and a notch is provided at the bottom of the limiting strip. An outer sleeve is fixedly connected to the top of the end cover, and the bottom of the outer sleeve is fixedly connected to the limiting housing. A cutter is fixedly connected to the top of the limiting ring, and the cutting end of the cutter is located inside the limiting housing. The inner sleeve is slidably connected to the inside of the outer sleeve, and two mounting blocks are fixedly connected to the surface of the inner sleeve along the circumferential direction. One side of the mounting block is fixedly connected to a limit pin. The surface of the outer sleeve is fixedly connected to two mounting rings along the circumferential direction. The limit pins are slidably inserted into the corresponding mounting rings. A third spring is sleeved on the limit pin, and the third spring is fixedly connected between the corresponding mounting block and the mounting ring. The tops of the outer sleeve and the inner sleeve are both threadedly connected with positioning bolts. Ends of the outer sleeve and the inner sleeve that are away from each other are both bonded with annular sealant.

2. The multi-dimensional lightning protection device based on zinc oxide nonlinear material according to claim 1, characterized in that: The interior of the first communicating groove is fixedly connected to a second exhaust pipe, and a one-way valve is fixedly installed on the second exhaust pipe.

3. The multi-dimensional lightning protection device based on zinc oxide nonlinear material according to claim 1, characterized in that: A first spiral groove is provided on the silicone rubber sleeve, a spiral ventilation pipe is arranged inside the first spiral groove, a second spiral groove is provided on the inner wall of the silicone rubber sleeve, a plurality of connecting holes are provided on the second spiral groove, the connecting holes are all connected to the first spiral groove, the end cover and the bottom cover are respectively fixedly connected with an air outlet pipe and an air inlet pipe, the air inlet pipe is connected with a ventilation and air intake mechanism, the air outlet pipe and the air inlet pipe are respectively located at the upper and lower ends of the spiral ventilation pipe, the end cover is fixedly connected with a casting pipe, the casting pipe is located at the top of the second spiral groove, the bottom of the end cover is fixedly connected with a retaining ring, the retaining ring is in sliding contact with the inner wall of the silicone rubber sleeve.

4. The multi-dimensional lightning protection device based on zinc oxide nonlinear material according to claim 3, characterized in that: The ventilation and air intake mechanism comprises a fan, which is fixedly mounted on the bottom cover, and one end of the air inlet pipe is fixedly connected to the fan.

5. The multi-dimensional lightning protection device based on zinc oxide nonlinear material according to claim 1, characterized in that: Both ends of the silicone rubber sleeve are provided with thread grooves, and the end cover and the bottom cover are respectively threadedly connected to the corresponding thread grooves.

6. The multi-dimensional lightning protection device based on zinc oxide nonlinear material according to claim 3, characterized in that: An annular sealing strip is fixedly connected to the inside of the end cover and the bottom cover, and the annular sealing strip is located between the first spiral groove and the second spiral groove.

7. The multi-dimensional lightning protection device based on zinc oxide nonlinear material according to claim 1, characterized in that: A plurality of silicone rubber sheds are fixedly connected to the surface of the silicone rubber sleeve, and the silicone rubber sheds are all inclined downward.

8. The multi-dimensional lightning protection device based on zinc oxide nonlinear material according to claim 1, characterized in that: The fixing ring and the end cover are fixed by connecting bolts.

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