35kV cage-type structure large-flux line lightning arrester

Abstract

The utility model relates to the technical field of electric appliance engineering, and provides a 35kV cage-type structure high-throughput line arrester, which comprises a plurality of first through holes distributed at intervals along the axis direction of an insulating cylinder, the two end plugging blocks are arranged at the two ends of the insulating cylinder respectively, and the two end plugging blocks and the insulating cylinder form a cage type space. The resistor piece is arranged in the cage type space, the two ends of the resistor piece are electrically connected with the two end plug blocks respectively, a gap is formed between the resistor piece and the inner wall of the insulating cylinder, and the gap and the first through hole are filled with silicon rubber. According to the technical scheme, the problem of poor voltage release performance of the lightning arrester in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electrical engineering, specifically, and relates to 35kV cage type structure big flow line arrester. BACKGROUND

[0002] The arrester is applied to protect power facilities from lightning overvoltage and operating overvoltage, and is a large number of electrical components applied in high-voltage power stations, which can effectively protect power facilities from being damaged by electric shock.

[0003] The arrester body in the prior art is usually a nylon or PBT injection molding structure or an epoxy glass fiber band winding structure, and once the arrester releases pressure, the fragments are easy to splash outward, which can easily threaten the safety of nearby equipment and personnel. UTILITY MODEL CONTENT

[0004] The utility model provides 35kV cage type structure big flow line arrester, solve the problem that the arrester of related art releases pressure performance is poor.

[0005] The technical scheme of the utility model is as follows:

[0006] The 35kV cage type structure big flow line arrester comprises:

[0007] The insulating cylinder has a plurality of first through holes distributed at intervals along the axis direction of the insulating cylinder.

[0008] The end plug has two, and is arranged at the two ends of the insulating cylinder respectively, and the two end plugs, the insulating cylinder form a cage type space.

[0009] The resistor is arranged in the cage type space, and the two ends of the resistor are electrically connected with the two end plugs respectively, and the resistor and the inner wall of the insulating cylinder have a gap, and the gap and the first through hole are filled with silicone rubber.

[0010] Optionally, the resistor comprises:

[0011] The first mounting disc is electrically connected with one end plug.

[0012] The second mounting disc is electrically connected with another end plug.

[0013] The resistor sheet has a plurality of resistor sheets, and the first mounting disc and the second mounting disc are used for clamping the resistor sheet.

[0014] Optionally, the first mounting disc has a plurality of second through holes, the second mounting disc has a plurality of third through holes, the second through holes and the third through holes are respectively distributed circumferentially along the axes of the first mounting disc and the second mounting disc, and the axes of each of the second through holes are collinear with the axes of one of the third through holes, and the device further comprises:

[0015] Connecting rods, having a plurality of, the connecting rods have threads at both ends, the connecting rods pass through the second through holes and the third through holes at both ends respectively, and the connecting rods are connected to the first mounting disc and the second mounting disc by the nuts at both ends respectively, and the first mounting disc and the second mounting disc are electrically connected to the end plug by the connecting rods.

[0016] Optionally, the connecting rods comprise:

[0017] Insulating rods;

[0018] Sleeves, having two, the sleeves are sleeved at both ends of the insulating rods respectively, and the sleeves have internal threads at the other ends;

[0019] Threaded rods, having two, the threaded rods are screwed with the internal threads of the sleeves respectively, the threaded rods pass through the second through holes and the third through holes respectively, and the insulating rods are connected to the first mounting disc and the second mounting disc by the threaded rods at both ends respectively.

[0020] Optionally, the connecting rods are distributed circumferentially along the axis of the first mounting disc at intervals, and the resistors are located between the connecting rods, and the axes of the resistors are collinear with the axis of the first mounting disc.

[0021] Optionally, the device further comprises:

[0022] Umbrella skirts, the insulating barrels are located in the umbrella skirts.

[0023] Optionally, the cage space is a sealed space.

[0024] Optionally, the device further comprises:

[0025] Conductive pads, having a plurality of, located between the resistors, the resistors and the first mounting disc, and the resistors and the second mounting disc respectively.

[0026] Optionally, the insulating rods are epoxy core rod pull rods.

[0027] Optionally, the insulating barrels have internal threads at both ends, the end plugs have external threads, and the end plugs are screwed with the insulating barrels.

[0028] The working principle and beneficial effects of the device are as follows:

[0029] In the utility model, the insulating cylinder is made of high-temperature-resistant and high-strength insulating material, and a plurality of first through holes are uniformly distributed along the axial direction. When the insulating cylinder is filled with silicone rubber, the silicone rubber will fill the first through holes, and when the pressure in the insulating cylinder is released, the pressure can be uniformly released from the first through holes because the silicone rubber is softer than the insulating cylinder, thereby preventing the pressure in the insulating cylinder from being concentrated at a weak point, so that the insulating cylinder is not deformed or broken due to excessive local pressure.

[0030] The two end plugs are made of high-quality aluminum alloy material and are respectively installed at the two ends of the insulating cylinder through precise threaded connection, so that the tightness and stability of the connection are ensured, moisture and impurities are effectively prevented from entering the cage space, the internal resistance element is prevented from being affected by moisture or pollution, and the service life of the lightning arrester is prolonged.

[0031] The resistance element and the two end plugs have reliable electrical connection, the resistance of the zinc oxide resistor is very high when the voltage is low, and the current is very small, the resistance of the zinc oxide resistor sharply decreases when the voltage exceeds a certain threshold, and the current rapidly increases, so that the overvoltage is limited. The resistance element and the inner wall of the insulating cylinder are intentionally kept apart by a proper gap of 4 mm. The silicone rubber filled in the gap has good insulation and sealing performance, can effectively prevent external electromagnetic fields from interfering with the internal lightning arrester, and improves the anti-interference ability of the lightning arrester.

[0032] In actual operation, the silicone rubber filled in the gap and the first through hole significantly enhances the insulation performance of the lightning arrester, effectively buffers the possible pressure impact inside, and greatly reduces the risk of damage of the lightning arrester due to excessive internal pressure. When the lightning arrester is subjected to overvoltage, the resistance element rapidly responds to limit the rise of current and voltage, and ensures the safe operation of the power system. The uniform pressure release of the silicone rubber at the first through hole effectively ensures the integrity and stability of the structure of the insulating cylinder, prevents it from being damaged due to excessive local pressure, and further improves the reliability and safety of the lightning arrester. BRIEF DESCRIPTION OF DRAWINGS

[0033] The above characteristics, technical features, advantages and implementation modes of the utility model will be further described in a clear and understandable manner in combination with the preferred embodiments and the drawings.

[0034] Figure 1 It is a structural schematic diagram of the utility model;

[0035] Figure 2 It is a sectional view of the utility model;

[0036] Figure 3 It is a structural schematic diagram of the utility model Figure 2 A magnified structure schematic diagram of the utility model.

[0037] In the figure: 100, insulating cylinder, 110, first through hole, 200, end plug, 120, cage space, 300, resistance piece, 310, resistance sheet, 320, first mounting disc, 330, second mounting disc, 321, second through hole, 331, third through hole, 340, connecting rod, 341, insulating rod, 342, sleeve, 343, threaded rod, 400, umbrella skirt, 500, conductive pad. DETAILED DESCRIPTION

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, specific embodiments of the present application will be described below with reference to the drawings. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without creative labor, and other embodiments can also be obtained.

[0039] In order to make the drawing simple, only the parts related to the present application are shown in the drawings, which do not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, in some drawings, only one of the components with the same structure or function is shown, or only one of them is marked. In this paper, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0040] In this paper, it should be noted that unless otherwise specified and limited, the terms "mounting", "connecting" and "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] In addition, in the description of the present application, the terms "first", "second" and the like are only used for differentiation and description, and cannot be understood as indicating or implying relative importance.

[0042] Reference Figures 1-3The utility model discloses a 35kV cage structure big flow line arrester, including along the first through -hole 110 of a plurality of interval distribution of insulating cylinder 100 axis direction, the end head block 200 has two, sets up respectively in the both ends of insulating cylinder 100, two end head block 200, insulating cylinder 100 constitutes cage space 120, resistance piece 300 sets up in cage space 120, and resistance piece 300 both ends are electrically connected with two end head block 200 respectively, and resistance piece 300 and the clearance between the inner wall of insulating cylinder 100 are filled with silicone rubber in the clearance and first through -hole 110.

[0043] In the embodiment, the insulating cylinder 100 is made of high-temperature-resistant and high-strength insulating material, and a plurality of first through-holes 110 are uniformly distributed along the axis direction. When filling silicone rubber into the insulating cylinder 100, the silicone rubber will fill the first through-holes 110. When the pressure is released in the insulating cylinder 100, the pressure can be uniformly released from the first through-holes 110 because the silicone rubber is softer than the insulating cylinder 100, preventing the pressure in the insulating cylinder 100 from concentrating on a weak point, thereby preventing the insulating cylinder 100 from deforming or rupturing due to excessive local pressure.

[0044] The two end head blocks 200 are made of high-quality aluminum alloy material and are installed at the two ends of the insulating cylinder 100 through precise threaded connection, ensuring the tightness and stability of the connection, effectively preventing moisture and impurities from entering the cage space 120, avoiding the internal resistance piece 300 from being affected by moisture or pollution, and prolonging the service life of the arrester.

[0045] The resistance piece 300 has reliable electrical connection with the two end head blocks. When the voltage is low, the resistance of the zinc oxide resistor is high, and the current is small. When the voltage exceeds a certain threshold, the resistance of the zinc oxide resistor decreases sharply, and the current increases rapidly, thereby limiting the overvoltage. The resistance piece 300 and the inner wall of the insulating cylinder 100 intentionally maintain a proper gap of 4 mm. The silicone rubber filled in the gap has good insulation and sealing performance, effectively preventing external electromagnetic fields from interfering with the internal arrester, and improving the anti-interference ability of the arrester.

[0046] In actual operation, the silicone rubber filled in the gap and the first through-holes 110 significantly enhances the insulation performance of the arrester, effectively buffers the possible pressure impact inside, and greatly reduces the risk of damage to the arrester due to excessive internal pressure. When the arrester is subjected to overvoltage, the resistance piece 300 responds quickly to limit the rise of current and voltage, ensuring the safe operation of the power system. The uniform pressure release of the silicone rubber at the first through-holes 110 effectively ensures the integrity and stability of the structure of the insulating cylinder 100, preventing it from being damaged due to excessive local pressure, and further improving the reliability and safety of the arrester.

[0047] After the resistor 300 is placed in the insulating barrel 100, the insulating barrel 100 is filled with silicone rubber. When filling, the insulating barrel 100 can be placed in a special mold to allow the silicone rubber to completely fill the first through hole 110.

[0048] It should be further pointed out that the first through holes 110 are spaced along the axis of the insulating barrel 100, and each group of first through holes 110 is spaced along the circumference of the insulating barrel 100.

[0049] Further, the resistor 300 includes a first mounting disc 320 electrically connected to one end plug 200, a second mounting disc 330 electrically connected to another end plug 200, and a plurality of resistor sheets 310, each of which is located between the first mounting disc 320 and the second mounting disc 330. The first mounting disc 320 and the second mounting disc 330 are used to clamp the resistor sheets 310.

[0050] In this embodiment, the first mounting disc 320 plays a key role in the resistor 300. The first mounting disc 320 is made of a metal material with good electrical conductivity, which provides reliable protection for the electrical connection between the resistor sheets 310 and the corresponding end plug 200. It is worth mentioning that the connection between the first mounting disc 320 and the end plug 200 is carefully designed to ensure efficient and stable current transmission and effectively reduce energy loss.

[0051] The second mounting disc 330 also plays an important role. The second mounting disc 330 is made of the same high-quality conductive material as the first mounting disc 320 and is electrically connected to the other end plug 200. The tightness and stability of the connection lay the foundation for the normal operation of the entire resistor 300, allowing the current to flow smoothly.

[0052] The resistor sheets 310, as the core component, are evenly distributed between the first mounting disc 320 and the second mounting disc 330. The first mounting disc 320 and the second mounting disc 330 tightly clamp the resistor sheets 310. This clamping structure has significant advantages, effectively preventing the resistor sheets 310 from shifting or loosening during operation, ensuring good contact between the resistor sheets 310 and the mounting discs, and thus ensuring the stable operation of the lightning arrester under various complex working conditions.

[0053] The first mounting disc 320 and the second mounting disc 330 can also be used to pre-assemble the resistor sheets 310 into the resistor 300, and then placed in the insulating barrel 100, which facilitates the assembly of the overall lightning arrester.

[0054] Further, the first mounting disc 320 has a plurality of second through holes 321, the second mounting disc 330 has a plurality of third through holes 331, the second through holes 321 and the third through holes 331 are respectively distributed along the axis of the first mounting disc 320 and the second mounting disc 330, the axis of each second through hole 321 is collinear with the axis of a third through hole 331, and the connecting rod 340 has a plurality of connecting rods 340, the connecting rod 340 has threads at both ends, the connecting rod 340 passes through a second through hole 321 and a third through hole 331 at both ends respectively, and the connecting rod 340 is connected to the first mounting disc 320 and the second mounting disc 330 by nuts at both ends respectively. The first mounting disc 320 and the second mounting disc 330 are electrically connected to the end plug 200 through the connecting rod 340.

[0055] In this embodiment, the connecting rod 340 passes through the corresponding second through hole 321 and third through hole 331 in turn, and the nuts are tightened, and the nuts provide the force for the first mounting disc 320 and the second mounting disc 330 to clamp the resistance sheet 310. The second through hole 321 and the third through hole 331 are respectively distributed along the axis of the first mounting disc 320 and the third mounting disc, which can make the clamping force of the first mounting disc 320 and the second mounting disc 330 more uniform, and avoid the situation of local overheating or unstable resistance value.

[0056] Further, the connecting rod 340 includes an insulating rod 341; the sleeve 342 has two, one end of the two sleeves 342 is sleeved on the two ends of the insulating rod 341 respectively, the other end of the sleeve 342 has internal threads; the threaded rod 343 has two, the two threaded rods 343 are respectively screwed with the internal threads of the two sleeves 342, the two threaded rods 343 pass through the second through hole 321 and the third through hole 331 respectively, and the two ends of the insulating rod 341 are connected to the first mounting disc 320 and the second mounting disc 330 through the threaded rods 343 respectively.

[0057] In this embodiment, the connecting rod 340 is composed of the insulating rod 341, the sleeve 342 and the threaded rod 343, the insulating rod 341 has a threaded section for connecting with the nut through the sleeve 342 and the threaded rod 343, which not only provides the strength of the connection, but also avoids additional processing on the insulating rod 341, ensuring the strength of the insulating rod 341.

[0058] After the insulating cylinder 100 is filled with silicone rubber, the insulating rod 341 is completely wrapped by the silicone rubber, which improves the moisture-proof performance and heat dissipation performance inside the lightning arrester, improves the bending resistance, impact resistance and shear resistance of the insulating rod 341, and greatly consumes the kinetic energy of the resistance sheet flying outward.

[0059] In actual production process, the sleeve 342 and the threaded rod 343 can be produced in advance as standard parts, even if the length of the insulating rod 341 changes, the sleeve 342 and the threaded rod 343 can be used for assembly, improving the convenience of the overall device.

[0060] Further, the plurality of connecting rods 340 are distributed along the axis of the first mounting disc 320 at intervals in a circumferential direction, and the plurality of resistance sheets 310 are located between the connecting rods 340, and the axes of the resistance sheets 310 are collinear with the axis of the first mounting disc 320.

[0061] In this embodiment, the plurality of connecting rods 340 are distributed along the axis of the first mounting disc 320 at intervals in a circumferential direction, and the resistance sheets 310 are located between the connecting rods 340, and the connecting rods 340 can limit the resistance sheets 310 to prevent lateral displacement of the resistance sheets 310.

[0062] Further, the insulating cylinder 100 is located in the umbrella skirt 400.

[0063] In this embodiment, the umbrella skirt 400 is composed of silicone rubber, which can improve the external insulation performance of the lightning arrester, effectively prevent surface flashover discharge, and enhance the insulation capability of the lightning arrester in harsh environments. Moreover, the umbrella skirt 400 can reduce the accumulation of rainwater on the surface of the lightning arrester, avoiding the formation of a continuous conductive path. At the same time, it can prevent the attachment of impurities such as dust and contamination on the surface of the lightning arrester to some extent, reducing the risk of pollution.

[0064] The umbrella skirt 400 is attached to the outer wall of the insulating cylinder 100 by high-temperature vulcanized silicone rubber and extrusion molding.

[0065] Further, the cage space 120 is a sealed space.

[0066] In this embodiment, the sealed cage space 120 can provide waterproofness for the entire lightning arrester, thereby improving the service life of the lightning arrester.

[0067] Further, the plurality of conductive pads 500 are located between the two resistance sheets 310, the resistance sheet 310 and the first mounting disc 320, and the resistance sheet 310 and the second mounting disc 330.

[0068] In this embodiment, the conductive pads can fill the gaps between the resistance sheets 310, ensuring good electrical contact, reducing contact resistance, and reducing heat generation and energy loss caused by poor contact. Moreover, when the lightning arrester is subjected to vibration or impact, the conductive pads can also play a certain buffering role, reducing the mutual collision and wear between the resistance sheets 310, and protecting the resistance sheets 310 from mechanical damage.

[0069] Further, the insulating rod 341 is an epoxy core rod pull rod.

[0070] In the embodiment, the insulating rod 341 is an epoxy core rod pull rod, the epoxy material has excellent insulation characteristics, can effectively prevent current leakage, ensures the safe operation of the power equipment, and can withstand greater tension and pressure, provides stable support and connection for the equipment, and the size change of the epoxy material is small under different temperature and humidity conditions, ensuring the accuracy and reliability of the connection.

[0071] Further, the insulating cylinder 100 has an internal thread at both ends, and the end plug 200 has an external thread, and the end plug 200 is threadedly connected with the insulating cylinder 100.

[0072] In the embodiment, the threaded connection between the end plug 200 and the insulating cylinder 100 is realized through the internal thread of the insulating cylinder 100 and the external thread of the end plug 200, respectively, and the end plug 200 can enter the insulating cylinder 100 as a whole, facilitating the installation of the general connecting piece at both ends of the lightning arrester and the forming of the umbrella skirt 400.

[0073] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. 35kV cage-type structure large flow line arrester, characterized by: include: An insulating cylinder (100) having a plurality of first through holes (110) distributed at intervals along the axial direction of the insulating cylinder (100); There are two end block blocks (200), which are respectively arranged at both ends of the insulating cylinder (100); the two end block blocks (200) and the insulating cylinder (100) form a cage-type space (120); The resistor (300) is arranged in the cage-type space (120), and both ends of the resistor (300) are electrically connected to the two end blocks (200) respectively. There is a gap between the resistor (300) and the inner wall of the insulating cylinder (100), and the gap and the first through hole (110) are filled with silicone rubber.

2. The 35kV cage-type structure large flow line arrester according to claim 1 is characterized in that: The resistor (300) comprises: a first mounting plate (320), the first mounting plate (320) being electrically connected to one of the end blocking blocks (200); a second mounting plate (330), the second mounting plate (330) being electrically connected to the other end block (200); There are a plurality of resistor sheets (310), each of which is located between the first mounting plate (320) and the second mounting plate (330), and the first mounting plate (320) and the second mounting plate (330) are used to clamp the resistor sheets (310).

3. The 35kV cage-type structure large flow line arrester according to claim 2, characterized in that: The first mounting plate (320) has a plurality of second through holes (321), the second mounting plate (330) has a third through hole (331), the second through holes (321) and the third through holes (331) are respectively distributed along the axis of the first mounting plate (320) and the second mounting plate (330), and the axis of each second through hole (321) is collinear with the axis of one of the third through holes (331), and further comprises: There are a plurality of connecting rods (340), each having a thread at both ends of the connecting rod (340), each of which passes through a second through hole (321) and a third through hole (331), and each of which is connected to the first mounting plate (320) and the second mounting plate (330) via a nut, respectively. The first mounting plate (320) and the second mounting plate (330) are both electrically connected to the end block (200) via the connecting rod (340).

4. The 35kV cage-type structure large flow line arrester according to claim 3, characterized in that: The connecting rod (340) includes: Insulating rod (341); There are two sleeves (342), one end of each of the two sleeves (342) is sleeved on both ends of the insulating rod (341), and the other end of each sleeve (342) has an internal thread; There are two threaded rods (343), the two threaded rods (343) are respectively threadedly connected to the internal threads of the two sleeves (342), the two threaded rods (343) respectively pass through the second through hole (321) and the third through hole (331), and the two ends of the insulating rod (341) are respectively connected to the first mounting plate (320) and the second mounting plate (330) through the threaded rods (343).

5. The 35kV cage-type structure large flow line arrester according to claim 3, characterized in that: The plurality of connecting rods (340) are distributed at intervals along the circumference of the axis of the first mounting plate (320), the plurality of resistor sheets (310) are located between the connecting rods (340), and the axis of the resistor sheets (310) is collinear with the axis of the first mounting plate (320).

6. The 35kV cage-type structure large flow line arrester according to claim 1, characterized in that: Also includes: An umbrella skirt (400), wherein the insulating tube (100) is located inside the umbrella skirt (400).

7. The 35kV cage-type structure large flow line arrester according to claim 1, characterized in that: The cage-type space (120) is a sealed space.

8. The 35kV cage-type structure large flow line arrester according to claim 2, characterized in that: Also includes: There are a plurality of conductive pads (500), which are respectively located between the two resistor sheets (310), between the resistor sheet (310) and the first mounting plate (320), and between the resistor sheet (310) and the second mounting plate (330).

9. The 35kV cage-type structure large flow line arrester according to claim 4, characterized in that: The insulating rod (341) is an epoxy core rod.

10. The 35kV cage-type structure large flow line arrester according to claim 1, characterized in that: Both ends of the insulating cylinder (100) have internal threads, the end block (200) has external threads, and the end block (200) is threadedly connected to the insulating cylinder (100).

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