Built-in column type 35kV voltage limiter core group structure

Abstract

The utility model relates to the technical field of 35kV voltage limiter core groups, and discloses a built-in column type 35kV voltage limiter core group structure, which comprises an integrated electrode, a voltage limiting mechanism is arranged on the right side of the integrated electrode, an installation mechanism is arranged on the right side of the integrated electrode, the voltage limiting mechanism comprises a lightning protection assembly and a discharge gap assembly, and the lightning protection assembly is arranged on the right side of the integrated electrode. The discharge gap assembly is arranged on the right side of the lightning protection assembly. An integrated electrode and an epoxy insulating tube are arranged to be of an integrated structure, a drawing insulating rod and a discharge gap ball are in tight pressing buckle connection, a thermal shrinkage gap is formed between the integrated electrode and the epoxy insulating tube, and an asymmetric gap arrangement scheme is adopted between a first gap arc striking rod and a second gap arc striking rod. And an anti-fouling and anti-icing umbrella is arranged outside the silicon rubber umbrella skirt, so that a combined body of the discharge gap insulation section and the anti-overvoltage lightning arrester section is integrally formed, the gap can be insulated and supported, and a perfect overvoltage protection function is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of 35kV voltage limiter core groups, in particular to a built-in column type 35kV voltage limiter core group structure. Background Art

[0002] Lightning strike is a major natural disaster in the power system. Accidents caused by lightning strike account for half of the total accidents in the power system. The impact on the power system is very large, seriously affecting the safety and reliability of power supply. Therefore, the power department implements various countermeasures to reduce lightning strike accidents. With the expansion of the mileage of insulated conductors in transmission lines, the problem of lightning strikes has become more and more prominent. The voltage limiter can prevent the power frequency aftercurrent arcing after the lightning strikes the circuit, thus having a better protection effect.

[0003] According to the description of a bolt-fixed voltage limiter core group disclosed in the patent website (authorization announcement number: CN 213601709U), "The utility model belongs to the technical field of overhead line equipment, specifically a bolt-fixed voltage limiter core group. It includes an upper hardware, a guide rod, an upper electrode, a zinc oxide core, a winding insulation layer, a lower electrode, a lower hardware, and a fixing bolt; the upper hardware is fixed to the upper end of the guide rod, and the lower hardware is fixed to the lower end of the guide rod; the upper electrode, the zinc oxide core, and the lower electrode are connected in series and sleeved on the guide rod in sequence, and are fixedly connected together by the winding insulation layer; a conductive rod with a discharge ball at the end is connected to the upper electrode by a bolt fastener; the structure in which the upper electrode is connected to a conductive rod with a discharge ball at the end by a bolt fastener can reconnect and fix the waste voltage limiter core group, reduce the loss caused by the direct scrapping of the voltage limiter core group due to the breakage of the conductive rod, and play a positive role in the development of the industry."

[0004] In view of the above description, the applicant believes that there are the following problems:

[0005] During use, the utility model simplifies the structure by combining the overhead line support column and the voltage limiter into one, so that it has both the line support function and the protection effect of the voltage limiter. However, in actual use, the voltage limiter only has the voltage limiting effect and does not have the overvoltage protection function. The structure is relatively simple. Therefore, it is necessary to improve an internal column type 35kV voltage limiter core group structure to solve the above problems. Utility Model Content

[0006] The utility model aims to provide a built-in column type 35kV voltage limiter core group structure to solve the problems raised in the above background technology.

[0007] To achieve the above object, the utility model provides the following technical solutions: a built-in column type 35kV voltage limiter core group structure, comprising an integrated electrode, a voltage limiting mechanism is arranged on the right side of the integrated electrode, and a mounting mechanism is arranged on the right side of the integrated electrode;

[0008] The voltage limiting mechanism comprises a lightning protection component and a discharge gap component, and the discharge gap component is arranged on the right side of the lightning protection component.

[0009] Preferably, the lightning protection assembly includes an epoxy insulating tube, which is fixedly installed on the right side of the integrated electrode, an axle pin is arranged inside the epoxy insulating tube, two end electrodes are arranged inside the epoxy insulating tube, and a silicone rubber umbrella skirt is arranged outside the epoxy insulating tube, which can not only insulate the support gap, but also has a complete overvoltage protection function.

[0010] Preferably, the silicone rubber umbrella skirt is provided with anti-fouling and anti-icing umbrellas outside, and the electrodes at both ends are arranged in a pancake shape, and the electrodes at both ends are pancake-shaped, with multiple protection and sealing manufacturing technology, core mechanical strength and protection level.

[0011] Preferably, the discharge gap assembly includes an insulating rod, which is arranged on the inner side of the epoxy insulating tube, a discharge gap ball is fixedly installed on the right side of the epoxy insulating tube, a gap arcing rod 2 is arranged on the outer side of the insulating rod, and a gap arcing rod 1 is arranged on the outer side of the insulating rod, forming a discharge gap insulating section and an overvoltage arrester section combination as a whole.

[0012] Preferably, an asymmetric gap arrangement scheme is used between the gap arc-starting rod 1 and the gap arc-starting rod 2, forming a discharge gap insulation section and an overvoltage arrester section combination as a whole.

[0013] Preferably, the installation mechanism includes a threaded groove, which is opened inside the electrodes at both ends. A threaded rod is threadedly installed inside the threaded groove, and a sealing ring is arranged on the outside of the threaded rod. The electrodes at both ends are installed through the threaded rod and the sealing ring.

[0014] Preferably, through holes are opened at positions corresponding to the epoxy insulating tube and the threaded rod, and the threaded rod passes through a sealing ring and the through-hole thread and is installed inside the thread groove to perform a sealing operation.

[0015] Compared with the prior art, the utility model provides a built-in column type 35kV voltage limiter core group structure, which has the following beneficial effects:

[0016] 1. The built-in column type 35kV voltage limiter core group structure, through the voltage limiting mechanism, during use, the integrated electrode and the epoxy insulating tube are set as an integrated structure, the insulated rod and the discharge gap ball are tightly pressed and connected, a heat shrink gap is set between the integrated electrode and the epoxy insulating tube, and an asymmetric gap arrangement scheme is adopted between the gap arcing rod 1 and the gap arcing rod 2, and anti-fouling and anti-icing umbrellas are set outside the silicone rubber umbrella skirt, forming a discharge gap insulation section and an overvoltage arrester section combination as a whole, which can insulate the support gap and has a complete overvoltage protection function.

[0017] 2. The built-in column type 35kV voltage limiter core group structure, through the installation mechanism, during use, the electrodes at both ends are installed by threaded rods and sealing rings, and the electrodes at both ends are pancake-shaped, with multiple protection and sealing manufacturing technology, core mechanical strength, protection level, and the whole branch DC mA, large current, residual pressure, water boiling, partial discharge sealing and other performances, and is superior to the traditional ring structure, simplifies the overall structure, and reduces the overall manufacturing cost by about 10%. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative labor:

[0019] Figure 1 This is a schematic diagram of the appearance structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of the lightning protection assembly of the utility model;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the discharge gap component of the utility model;

[0023] Figure 5 It is a schematic diagram of the exploded structure of the installation mechanism of the utility model.

[0024] In the figure: 1. integrated electrode; 2. voltage limiting mechanism; 21. lightning protection assembly; 211. epoxy insulating tube; 212. shaft pin; 213. electrodes at both ends; 214. silicone rubber umbrella skirt; 22. discharge gap assembly; 221. insulated rod; 222. discharge gap ball; 223. gap arcing rod 1; 224. gap arcing rod 2; 3. installation mechanism; 31. threaded groove; 32. threaded rod; 33. sealing ring. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Embodiment 1:

[0028] See also Figure 1-4 , the utility model provides a technical solution: a built-in column type 35kV voltage limiter core group structure, including an integrated electrode 1, a voltage limiting mechanism 2 is arranged on the right side of the integrated electrode 1, and a mounting mechanism 3 is arranged on the right side of the integrated electrode 1;

[0029] The voltage limiting mechanism 2 includes a lightning protection component 21 and a discharge gap component 22 . The discharge gap component 22 is arranged on the right side of the lightning protection component 21 .

[0030] Furthermore, the lightning protection assembly 21 includes an epoxy insulating tube 211, which is fixedly installed on the right side of the integrated electrode 1. An axle pin 212 is arranged inside the epoxy insulating tube 211, two end electrodes 213 are arranged inside the epoxy insulating tube 211, and a silicone rubber umbrella skirt 214 is arranged outside the epoxy insulating tube 211, which can not only insulate the support gap, but also has a complete overvoltage protection function.

[0031] Furthermore, the silicone rubber umbrella skirt 214 is provided with anti-fouling and anti-icing umbrellas outside, and the electrodes 213 at both ends are arranged in a pancake shape. The electrodes 213 at both ends are pancake-shaped, with multiple protections and sealing manufacturing technology, core mechanical strength and protection level.

[0032] Furthermore, the discharge gap assembly 22 includes an insulating rod 221, which is arranged on the inner side of the epoxy insulating tube 211, a discharge gap ball 222 is fixedly installed on the right side of the epoxy insulating tube 211, a gap arcing rod 224 is arranged on the outer side of the insulating rod 221, and a gap arcing rod 1 223 is arranged on the outer side of the insulating rod 221, forming a discharge gap insulation section and an overvoltage arrester section combination as a whole.

[0033] Furthermore, an asymmetric gap arrangement scheme is used between the gap arc-starting rod 1 223 and the gap arc-starting rod 224, so as to form a combination of a discharge gap insulation section and an overvoltage arrester section as a whole.

[0034] Embodiment 2:

[0035] See also Figure 5 In combination with the first embodiment, it is further obtained that the installation mechanism 3 includes a threaded groove 31, the threaded groove 31 is opened inside the electrodes 213 at both ends, a threaded rod 32 is threadedly installed inside the threaded groove 31, and a sealing ring 33 is arranged on the outside of the threaded rod 32, and the electrodes 213 at both ends are installed through the threaded rod 32 and the sealing ring 33.

[0036] Furthermore, through holes are opened at positions corresponding to the epoxy insulating tube 211 and the threaded rod 32 , and the threaded rod 32 passes through the sealing ring 33 and is threadedly installed in the thread groove 31 through the through hole to perform a sealing operation.

[0037] In actual operation, when the device is used, the integrated electrode 1 and the epoxy insulating tube 211 are set as an integrated structure, the insulated rod 221 and the discharge gap ball 222 are tightly pressed and connected, a heat shrink gap is set between the integrated electrode 1 and the epoxy insulating tube 211, and an asymmetric gap arrangement scheme is adopted between the gap arcing rod 1 223 and the gap arcing rod 2 224, and an anti-fouling and anti-icing umbrella is set outside the silicone rubber umbrella skirt 214, forming a discharge gap insulation section and an overvoltage arrester section combination as a whole, which can insulate the support gap and have a perfect overvoltage protection function. The electrodes 213 at both ends are installed and operated by the threaded rod 32 and the sealing ring 33, and the electrodes 213 at both ends are in the shape of a pancake, with multiple protection and sealing manufacturing technology, core mechanical strength, protection level and the entire branch DC 1mA, large current, residual pressure, water boiling partial discharge sealing and other performances, and are better than the traditional ring structure, simplifying the overall structure, and reducing the overall manufacturing cost by about 10%.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A built-in column type 35kV voltage limiter core group structure, comprising an integrated electrode (1), characterized in that: A pressure limiting mechanism (2) is provided on the right side of the integrated electrode (1), and a mounting mechanism (3) is provided on the right side of the integrated electrode (1); The voltage limiting mechanism (2) comprises a lightning protection component (21) and a discharge gap component (22), wherein the discharge gap component (22) is arranged on the right side of the lightning protection component (21); The lightning protection assembly (21) comprises an epoxy insulating tube (211), the epoxy insulating tube (211) is fixedly mounted on the right side of the integrated electrode (1), an axle pin (212) is arranged inside the epoxy insulating tube (211), two-end electrodes (213) are arranged inside the epoxy insulating tube (211), and a silicone rubber shed (214) is arranged outside the epoxy insulating tube (211); The discharge gap assembly (22) comprises an insulated rod (221) arranged inside the epoxy insulation tube (211), a discharge gap ball (222) is fixedly mounted on the right side of the epoxy insulation tube (211), a gap arcing rod 2 (224) is arranged outside the insulated rod (221), and a gap arcing rod 1 (223) is arranged outside the insulated rod (221).

2. The internal column type 35kV voltage limiter core group structure according to claim 1 is characterized in that: The silicone rubber umbrella skirt (214) is provided with an anti-fouling and anti-icing umbrella outside, and the electrodes (213) at both ends are in a pancake shape.

3. The internal column type 35kV voltage limiter core group structure according to claim 1, characterized in that: An asymmetric gap arrangement scheme is provided between the gap arc-starting rod 1 (223) and the gap arc-starting rod 2 (224).

4. The internal column type 35kV voltage limiter core group structure according to claim 1, characterized in that: The mounting mechanism (3) comprises a threaded groove (31), the threaded groove (31) being provided inside the electrodes (213) at both ends, a threaded rod (32) being threadedly mounted inside the threaded groove (31), and a sealing ring (33) being provided outside the threaded rod (32).

5. The internal column type 35kV voltage limiter core group structure according to claim 4, characterized in that: Through holes are provided at positions corresponding to the epoxy insulating tube (211) and the threaded rod (32), and the threaded rod (32) passes through the sealing ring (33) and the through hole and is threadedly installed inside the thread groove (31).

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