Heavy-load large-through-current lightning arrester

Abstract

The invention relates to the technical field of lightning arresters, and provides a heavy-load large-through-flow lightning arrester, which comprises a sleeve, a resistor mechanism and cover plate mechanisms, the sleeve is provided with a plurality of umbrella-shaped sheaths, the resistor mechanism is detachably arranged in the sleeve, the resistor mechanism is used for protection when being struck by lightning, the cover plate mechanisms are arranged at the two ends of the sleeve, and the umbrella-shaped sheaths are arranged on the cover plate mechanisms. The cover plate mechanism is used for pressing and fixing the resistor mechanism in the sleeve, the resistor mechanism comprises a pressure assembly, the pressure assembly is detachably arranged in the sleeve, a resistor assembly is arranged in the pressure assembly, the pressure assembly is used for pressing and fixing the resistor assembly, and the resistor assembly presents low resistance when powered on. According to the technical scheme, the lightning arrester solves the problem that a traditional lightning arrester in the prior art may have faults such as uneven pressure borne by a resistor disc or improper pressure release action when being struck by lightning, so that the lightning arrester has faults.

Description

Technical Field

[0001] The present invention relates to the technical field of lightning arresters, and in particular to a heavy-load and large-through-current lightning arrester. Background Art

[0002] In the power system, lightning arresters are used to protect substations, transmission lines and power generation equipment to reduce equipment damage and power outages caused by lightning strikes. In the communication system, lightning arresters are installed in base stations, data centers and communication lines to prevent the impact of lightning on communication equipment and ensure the stable operation of the communication network. The main function of the lightning arrester is to protect electrical equipment from damage caused by lightning overvoltage, operating overvoltage and power frequency transient overvoltage impact. It clips the intruding flow wave through the action of parallel discharge gaps or nonlinear resistors to reduce the overvoltage value of the protected equipment. The lightning arrester is almost non-conductive under normal working voltage, and when an overvoltage event occurs, its resistance drops rapidly to form a low-resistance channel to discharge the overvoltage energy into the ground, thereby protecting the insulation of the electrical equipment.

[0003] A traditional lightning arrester is provided with multiple resistors, which are bonded to each other for conduction and electrical contact. In order to maintain good contact between the resistors, a certain pressure needs to be applied to the multiple resistors. In a traditional lightning arrester, pressure is applied to the resistors through devices such as springs. However, this method may cause faults such as uneven pressure and improper pressure release after being struck by lightning, causing the lightning arrester to fail. Summary of the invention

[0004] The present invention provides a heavy-load and large-current arrester, which solves the problem in the related art that conventional arresters may have problems such as uneven pressure on resistors or improper pressure release when struck by lightning, which may lead to arrester failure.

[0005] The technical solution of the present invention is as follows: A heavy-load, high-current arrester comprises a sleeve, a resistor mechanism and a cover mechanism, wherein the sleeve is provided with a plurality of umbrella-shaped sleeves, the resistor mechanism is detachably arranged in the sleeve, and the resistor mechanism is used for protection when struck by lightning, the cover mechanism is arranged at both ends of the sleeve, and the cover mechanism is used for pressing and fixing the resistor mechanism in the sleeve, wherein the resistor mechanism comprises a pressure assembly, the pressure assembly is detachably arranged in the sleeve, a resistor assembly is arranged in the pressure assembly, and the pressure assembly is used for pressing and fixing the resistor assembly, wherein the resistor assembly presents high resistance at normal working voltage, and presents low resistance when struck by lightning.

[0006] The resistor mechanism also includes an insulating protective sleeve and a clamping component. The insulating protective sleeve is detachably arranged in the sleeve. The insulating protective sleeve is detachably connected to the cover mechanism. The clamping component is detachably arranged in the insulating protective sleeve. The resistor assembly is detachably arranged in the clamping component. The clamping component is used to press the resistor assembly. The insulating protective sleeve is set to PBT material, and a plurality of pressure release ports are arranged on the insulating protective sleeve.

[0007] The resistor assembly includes a resistor sheet, a terminal seat 1 and a terminal seat 2, wherein a plurality of resistor sheets are provided, and the plurality of resistor sheets are provided in a circular shape, and the plurality of resistor sheets are stacked and fitted to each other, the terminal seat 1 is detachably provided at one end of the insulating protective cover, the terminal seat 2 is detachably provided at an end of the insulating protective cover away from the terminal seat 1, and the plurality of resistor sheets are detachably provided between the terminal seat 1 and the terminal seat 2, wherein the clamping component is provided on the terminal seat 1 and the terminal seat 2.

[0008] The clamping component includes a screw 1, a tightening groove and a tightening structure. There are multiple screws 1, and the multiple screws 1 are detachably arranged on the terminal seat 1. There are multiple tightening grooves, and the tightening grooves are opened on the terminal seat 2. The tightening grooves correspond to the screws one by one. A tightening structure is slidably arranged in each tightening groove. Each tightening structure is provided with an epoxy tape together with the tensioning sleeve on the screw 1. The tightening structure is used to tighten and straighten the epoxy tape. The epoxy tape is made of insulating material and is located between the resistor and the insulating protective sleeve.

[0009] The tensioning structure includes a slide slot, a lifting block, a second screw, a lifting block and a pushing block, the slide slot is opened in the tightening slot, the slide slot is vertically arranged in the tightening slot, the lifting block is slidably arranged on the slide slot, the lifting block is close to the terminal seat One side is provided with an inclined surface, the second screw penetrates and is rotatably arranged on the lifting block, the lifting block is slidably arranged in the tightening slot, the lifting block is provided with an inclined surface, the inclined surface on the lifting block contacts the inclined surface on the lifting block, a strip slot is vertically opened on the side of the lifting block away from the lifting block, the second screw penetrates the strip slot, the pushing block is arranged in a long strip shape, the pushing block is slidably arranged in the tightening slot, the pushing block is in contact with the side of the lifting block away from the lifting block, the second screw penetrates the pushing block and is threadedly connected to the pushing block.

[0010] The cover mechanism includes a clamping block 1, a clamping block 2 and a sealing assembly. The clamping block 1 is detachably connected to the terminal seat 1, and the clamping block 2 is detachably connected to the terminal seat 2. The clamping block 1 and the clamping block 2 are arranged on the resistor mechanism and then installed in the sleeve. The sealing assembly is detachably arranged on the sleeve, and the sealing assembly is used to compress and seal the clamping block 1 and the clamping block 2.

[0011] The sealing assembly includes a sealing cover plate, a first wiring terminal, a second wiring terminal and a clamping component. The sealing cover plate is detachably arranged on the sleeve, the first wiring terminal is detachably arranged on the sealing cover plate, the first wiring terminal passes through the sealing cover plate, the first wiring terminal is detachably connected to the first clamping block, the second wiring terminal is detachably arranged on the sleeve, the second wiring terminal passes through the sleeve, the second wiring terminal is detachably connected to the second clamping block, the clamping component is arranged on a side of the sleeve where the second wiring terminal is arranged, the clamping component is in contact with the second clamping block, and the clamping component is used to squeeze the second clamping block.

[0012] The clamping component includes a clamping plate and a clamping sheet. The clamping plate is arranged between the clamping block 2 and the sleeve. A plurality of screws 3 are rotatably arranged on the clamping plate. The screws 3 penetrate the sleeve and are threadedly connected. A plurality of clamping sheets are arranged, and the plurality of clamping sheets are fixedly arranged on one side of the clamping plate close to the clamping block 2.

[0013] The working principle and beneficial effects of the present invention are: 1. In the present invention, an insulating protective sleeve is provided, the insulating protective sleeve is provided with a PBT material, and a plurality of pressure release ports are provided on the insulating protective sleeve. The insulating protective sleeve of the PBT material is an integral injection-molded type. When lightning strikes through the resistor component, the resistor sheet is subjected to a large pressure, and the heat and pressure on the resistor sheet are released through the pressure release ports, so that the arrester can withstand multiple lightning strikes; 2. In the present invention, by setting the epoxy tape, when the second screw is turned, the second screw pulls the push block to slide toward the lifting block, and the push block pushes the lifting block to slide, and the inclined surface on the lifting block presses the inclined surface on the lifting block, so that the lifting block slides on the slide groove in the direction away from the first screw, and gradually straightens the epoxy tape; 3. In the present invention, by providing a resistor mechanism, the resistor sheets can be more closely fitted to each other and can withstand multiple lightning strikes. By providing a cover mechanism, the resistor mechanism can be tightly pressed into the sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 Another perspective structural schematic diagram of the present invention as a whole; Figure 3 Schematic diagram of the internal structure of the sleeve in the present invention; Figure 4 It is a schematic diagram of the internal structure of the insulating protective cover in the present invention; Figure 5 It is a partial cross-sectional structural schematic diagram of the compression block 2 in the present invention; Figure 6 It is a partial cross-sectional structural schematic diagram of the cooperation between the sleeve and the second pressing block in the present invention.

[0016] In the figure: 1. sleeve; 2. umbrella-shaped sheath; 3. insulating protective cover; 4. pressure release port; 5. resistor; 6. terminal block one; 7. terminal block two; 8. screw one; 9. tightening groove; 10. slide groove; 11. lifting block; 12. screw two; 13. lifting block; 14. pushing block; 15. clamping block one; 16. clamping block two; 17. sealing cover; 18. terminal one; 19. terminal two; 20. clamping plate; 21. clamping sheet; 22. epoxy cloth tape; 23. screw three. DETAILED DESCRIPTION

[0017] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] like Figure 1 to Figure 6 As shown, this embodiment proposes a heavy-load large-current arrester, including a bushing 1, a resistor mechanism and a cover mechanism. The bushing 1 is provided with a plurality of umbrella-shaped sheaths 2. The resistor mechanism is detachably arranged in the bushing 1. The resistor mechanism is used for protection when struck by lightning. The cover mechanism is arranged at both ends of the bushing 1. The cover mechanism is used for pressing and fixing the resistor mechanism in the bushing 1. The resistor mechanism includes a pressure component. The pressure component is detachably arranged in the bushing 1. A resistor component is arranged in the pressure component. The pressure component is used for pressing and fixing the resistor component. The resistor component presents high resistance at normal working voltage and low resistance when struck by lightning. The arrester is installed on the equipment for lightning protection through the cover mechanism. The current passes through the resistor mechanism after passing through the cover mechanism.

[0019] like Figure 3~Figure 4As shown, the resistor mechanism also includes an insulating protective sleeve 3 and a clamping component. The insulating protective sleeve 3 is detachably arranged in the sleeve 1. The insulating protective sleeve 3 is detachably connected to the cover mechanism. The clamping component is detachably arranged in the insulating protective sleeve 3. The resistor assembly is detachably arranged in the clamping component. The clamping component is used to compress the resistor assembly. The insulating protective sleeve 3 is set to PBT material. A plurality of pressure release ports 4 are set on the insulating protective sleeve 3. The insulating protective sleeve 3 made of PBT material is an integral injection molding type. When lightning strikes the resistor assembly, the resistor sheet 5 is subjected to greater pressure, and the heat and pressure exerted on the resistor sheet 5 are released through the pressure release port 4.

[0020] like Figure 3~Figure 4 As shown, the resistor assembly includes a resistor sheet 5, a terminal seat 1 6 and a terminal seat 2 7, a plurality of resistor sheets 5 are provided, and the plurality of resistor sheets 5 are provided in a circular shape, and the plurality of resistor sheets 5 are stacked and fitted with each other, the terminal seat 1 6 is detachably provided at one end of the insulating protective cover 3, the terminal seat 2 7 is detachably provided at an end of the insulating protective cover 3 away from the terminal seat 1 6, and the plurality of resistor sheets 5 are detachably provided between the terminal seat 1 6 and the terminal seat 2 7, wherein a clamping component is provided on the terminal seat 1 6 and the terminal seat 2 7, and in this embodiment, eight resistor sheets 5 are provided, the terminal seat 1 6 and the terminal seat 2 7 clamp the eight resistor sheets 5, and the terminal seat 1 6 and the terminal seat 2 7 are connected and tightened by the clamping component, so that the terminal seat 1 6 and the terminal seat 2 7 clamp the resistor sheets 5, and the contact area between the resistor sheets 5 is increased.

[0021] like Figure 3~Figure 4 As shown, the clamping parts include a screw 8, a tightening groove 9 and a tightening structure. A plurality of screws 8 are provided, and the plurality of screws 8 are detachably arranged on the terminal seat 6. A plurality of tightening grooves 9 are provided, and the tightening grooves 9 are opened on the terminal seat 7. The tightening grooves 9 correspond to the screws 8 one by one. A tightening structure is slidably arranged in each tightening groove 9. Each tightening structure is provided with an epoxy tape 22 for tensioning sleeve on the screw 8. The tightening structure is used to tighten and straighten the epoxy tape 22. The epoxy tape 22 is made of insulating material. The epoxy tape 22 is located between the resistor 5 and the insulating protective sleeve 3. In this embodiment, six screws 8 and six epoxy tapes 22 are provided. The two ends of the epoxy tape 22 are put on the screw 8 and the screw 12, and the epoxy tape 22 can be tightened by the tightening structure.

[0022] like Figure 4~Figure 5As shown, the tensioning structure includes a slide 10, a lifting block 11, a second screw 12, a lifting block 13 and a pushing block 14. The slide 10 is opened in the tightening groove 9. The slide 10 is vertically arranged in the tightening groove 9. The lifting block 11 is slidably arranged on the slide 10. The lifting block 11 is provided with an inclined surface on one side close to the terminal seat 6. The second screw 12 penetrates and is rotatably arranged on the lifting block 11. The lifting block 13 is slidably arranged in the tightening groove 9. The lifting block 13 is provided with an inclined surface. The inclined surface on the lifting block 13 contacts the inclined surface on the lifting block 11. A strip groove is vertically opened on the side of the lifting block 13 away from the lifting block 11. , screw 2 12 passes through the strip groove, the pushing block 14 is set in a long strip shape, the pushing block 14 is slidably set in the tightening groove 9, the pushing block 14 is in contact with the side of the lifting block 13 away from the lifting block 11, the screw 2 12 passes through the pushing block 14 and is threadedly connected with the pushing block 14. When the screw 2 12 is rotated, the screw 2 12 pulls the pushing block 14 to slide toward the lifting block 11, and the pushing block 14 pushes the lifting block 13 to slide. The inclined surface on the lifting block 13 squeezes the inclined surface on the lifting block 11, so that the lifting block 11 slides on the slide groove 10 in the direction away from the screw 1 8, and gradually straightens the epoxy cloth tape 22.

[0023] like Figure 1 to Figure 6 As shown, the cover mechanism includes a clamping block 15, a clamping block 16 and a sealing assembly. The clamping block 15 is detachably connected to the terminal seat 1 6, and the clamping block 16 is detachably connected to the terminal seat 2 7. The clamping block 15 and the clamping block 16 are arranged on the resistor mechanism and then installed in the sleeve 1. The sealing assembly is detachably arranged on the sleeve 1, and the sealing assembly is used to compress and seal the clamping block 15 and the clamping block 16.

[0024] like Figure 3~Figure 6 As shown, the sealing assembly includes a sealing cover plate 17, a wiring terminal 18, a wiring terminal 2 19 and a clamping component. The sealing cover plate 17 is detachably arranged on the sleeve 1, the wiring terminal 18 is detachably arranged on the sealing cover plate 17, the wiring terminal 18 penetrates the sealing cover plate 17, the wiring terminal 18 is detachably connected to the clamping block 15, the wiring terminal 2 19 is detachably arranged on the sleeve 1, the wiring terminal 2 19 penetrates the sleeve 1, the wiring terminal 2 19 is detachably connected to the clamping block 2 16, the clamping component is arranged on a side of the sleeve 1 where the wiring terminal 2 19 is arranged, the clamping component contacts the clamping block 2 16, the clamping component is used to squeeze the clamping block 2 16, after one end of the clamping block 2 16 is extended into the sleeve, the sealing cover plate 17 is fixed, the wiring terminal 18 is docked with the clamping block 15, and the wiring terminal 2 19 is docked with the clamping block 2 16.

[0025] like Figure 6As shown, the clamping component includes a clamping plate 20 and a clamping sheet 21. The clamping plate 20 is arranged between the clamping block 16 and the sleeve 1. A plurality of screws 23 are rotatably arranged on the clamping plate 20. The screws 23 penetrate the sleeve 1 and are threadedly connected. A plurality of clamping sheets 21 are arranged. The plurality of clamping sheets 21 are fixedly arranged on the clamping plate 20 on one side close to the clamping block 16. After the sealing cover is fixed, the clamping plate 20 is moved toward the clamping block 16 by rotating the screws 23. The clamping sheet 21 squeezes the clamping block 16, so that the terminal 1 18 is tightly fitted with the clamping block 15, and the terminal 2 19 is tightly fitted with the clamping block 16.

[0026] To sum up, the working principle of this heavy-load and large-current lightning arrester is as follows: the resistor 5 is clamped through the terminal block 1 6 and the terminal block 2 7, the epoxy cloth tape 22 is sleeved on the screw 1 8 and the screw 2 12, the screw 1 8 and the screw 2 12 are tightened, the screw 2 12 pulls the push block 14, the push block 14 pushes the lifting block 13, the lifting block 13 pushes the lifting block 11 to slide on the slide groove 10, the screw 2 12 and the screw 1 8 straighten the epoxy cloth tape 22, the clamping block 15 and the clamping block 2 16 are respectively connected to the terminal block 1 6 and the terminal block 2 7, one end of the clamping block 2 16 is sent into the sleeve 1, the sealing cover plate 17 is fixed, and the screw 3 23 is tightened so that the clamping sheet 21 clamps the clamping block 2 16.

[0027] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A heavy-load and high-current arrester, characterized in that: include: A casing (1), wherein a plurality of umbrella-shaped sheaths (2) are provided on the casing (1); A resistance mechanism, the resistance mechanism being detachably arranged in the sleeve (1), and the resistance mechanism being used for providing protection when struck by lightning; A cover plate mechanism, the cover plate mechanism being arranged on both ends of the sleeve (1), the cover plate mechanism being used to press and fix the resistance mechanism in the sleeve (1); Wherein, the resistance mechanism includes: A pressure component, the pressure component is detachably arranged in the sleeve (1), a resistance component is arranged in the pressure component, and the pressure component is used to compress and fix the resistance component; The resistor component presents high resistance at normal working voltage, and presents low resistance when struck by lightning.

2. A heavy-load and high-current arrester according to claim 1, characterized in that: The resistance mechanism also includes: An insulating protective sleeve (3), the insulating protective sleeve (3) being detachably arranged in the sleeve (1), and the insulating protective sleeve (3) being detachably connected to the cover plate mechanism; A clamping component, the clamping component is detachably arranged in the insulating protective sleeve (3), the resistor assembly is detachably arranged in the clamping component, and the clamping component is used to compress the resistor assembly.

3. A heavy-load and high-current arrester according to claim 2, characterized in that: The insulating protective sleeve (3) is made of PBT material, and a plurality of pressure release ports (4) are provided on the insulating protective sleeve (3).

4. A heavy-load and high-current arrester according to claim 3, characterized in that: The resistor assembly comprises: A resistor sheet (5), wherein a plurality of resistor sheets (5) are provided, the plurality of resistor sheets (5) are arranged in a circular shape, and the plurality of resistor sheets (5) are stacked and bonded to each other; A terminal seat 1 (6), the terminal seat 1 (6) being detachably arranged at one end of the insulating protective sleeve (3); A second terminal seat (7), the second terminal seat (7) being detachably arranged on an end of the insulating protective sleeve (3) away from the first terminal seat (6), and a plurality of resistor sheets (5) being detachably arranged between the first terminal seat (6) and the second terminal seat (7); Wherein, the clamping component is arranged on the terminal seat 1 (6) and the terminal seat 2 (7).

5. A heavy-load and high-current arrester according to claim 4, characterized in that: The clamping component comprises: Screw 1 (8), a plurality of screws 1 (8) are provided, and the plurality of screws 1 (8) are detachably provided on the terminal seat 1 (6); A tightening groove (9), wherein a plurality of tightening grooves (9) are provided, wherein the tightening grooves (9) are provided on the second terminal seat (7), and the tightening grooves (9) correspond one to one with the first screw (8); A tensioning structure, wherein each of the tightening grooves (9) is slidably provided with a tensioning structure, and each of the tensioning structures is provided with an epoxy cloth tape (22) on the tensioning sleeve of the screw one (8), and the tensioning structure is used to tighten and straighten the epoxy cloth tape (22).

6. A heavy-load and high-current arrester according to claim 5, characterized in that: The tensioning structure comprises: A slide groove (10), wherein the slide groove (10) is opened in the tightening groove (9), and the slide groove (10) is vertically arranged in the tightening groove (9); A lifting block (11), the lifting block (11) being slidably disposed on the slide groove (10), and an inclined surface being disposed on a side of the lifting block (11) close to the terminal seat 1 (6); A second screw (12), the second screw (12) passing through and rotatably disposed on the lifting block (11); A lifting block (13), the lifting block (13) being slidably disposed in the tightening groove (9), the lifting block (13) being provided with an inclined surface, the inclined surface on the lifting block (13) being in contact with the inclined surface on the lifting block (11), a strip groove being vertically provided on a side of the lifting block (13) away from the lifting block (11), the second screw (12) passing through the strip groove; A pushing block (14), wherein the pushing block (14) is configured to be in the shape of a long strip, the pushing block (14) is slidably disposed in the tightening groove (9), the pushing block (14) is in contact with a side of the lifting block (13) away from the lifting block (11), and the second screw (12) passes through the pushing block (14) and is threadedly connected to the pushing block (14).

7. A heavy-load and high-through-current arrester according to claim 6, characterized in that: The cover plate mechanism comprises: A clamping block 1 (15), wherein the clamping block 1 (15) is detachably connected to the terminal block 1 (6); A second clamping block (16), the second clamping block (16) being detachably connected to the second terminal block (7), the first clamping block (15) and the second clamping block (16) being arranged on the resistor mechanism and then installed in the sleeve (1); A sealing assembly, the sealing assembly is detachably arranged on the sleeve (1), and the sealing assembly is used to compress and seal the first pressing block (15) and the second pressing block (16).

8. A heavy-load and high-through-current arrester according to claim 7, characterized in that: The sealing assembly comprises: A sealing cover plate (17), the sealing cover plate (17) being detachably arranged on the sleeve (1); A wiring terminal 1 (18), the wiring terminal 1 (18) being detachably arranged on the sealing cover plate (17), the wiring terminal 1 (18) penetrating the sealing cover plate (17), and the wiring terminal 1 (18) being detachably connected to the clamping block 1 (15); A second wiring terminal (19), the second wiring terminal (19) being detachably arranged on the sleeve (1), the second wiring terminal (19) passing through the sleeve (1), and the second wiring terminal (19) being detachably connected to the second pressing block (16); A clamping component, the clamping component is arranged on a side of the sleeve (1) where the second connecting terminal (19) is arranged, the clamping component is in contact with the second clamping block (16), and the clamping component is used to squeeze the second clamping block (16).

9. A heavy-load and high-through-current arrester according to claim 8, characterized in that: The pressing component comprises: A clamping plate (20), the clamping plate (20) being arranged between the clamping block 2 (16) and the sleeve (1), the clamping plate (20) being rotatably provided with a plurality of screws 3 (23), the screws 3 (23) penetrating the sleeve (1) and being threadedly connected; A clamping sheet (21), wherein a plurality of the clamping sheets (21) are provided, and the plurality of the clamping sheets (21) are fixedly arranged on a side of the clamping plate (20) close to the second clamping block (16).

10. A heavy-load and high-through-current arrester according to claim 9, characterized in that: The epoxy tape (22) is made of insulating material and is located between the resistor sheet (5) and the insulating protective sleeve (3).

Images