A kind of pillar type windproof insulator

Abstract

The present invention belongs to the field of electric porcelain, and particularly relates to a pillar-type windproof insulator, comprising an insulator body, an umbrella skirt is arranged on the insulator body, a wire-releasing groove is arranged on the upper end of the insulator body, windproof walls are arranged on both sides of the wire-releasing groove, a wire loading port is arranged above the wire-releasing groove, and the wire loading port is smaller than the wire-releasing groove, an inner shaft is arranged on the insulator body, a windproof sleeve is arranged outside the inner shaft, the windproof sleeve is in the shape of a hollow elliptical column, the protruding radius of the windproof sleeve is larger on one side than the other side, the windproof sleeve is rotatably connected to the inner shaft, a windproof umbrella skirt is arranged on the windproof sleeve, both sides of the windproof umbrella skirt are elliptical, and the protruding radius of the windproof umbrella skirt is larger on one side than the other side. The windproof sleeve is a mechanical streamline, and can be rotated to a streamline direction with the wind direction in strong winds, thereby reducing resistance, reducing wind damage to the insulator, and preventing the insulator from being broken by strong winds, and can resist 8-10 level strong winds, and is safer and more reliable to use in strong wind areas, and has a long service life.

Description

Technical Field

[0001] The invention belongs to the field of electrical porcelain, and in particular relates to a pillar-type windproof insulator. Background Art

[0002] Post insulators are a special type of insulating control that can play an important role in overhead transmission lines. In the early years, post insulators were mostly used for electric poles, and gradually developed into high-type high-voltage wire connection towers. Many suspended insulators are hung on one end. It is to increase the creepage distance. It is usually made of silicone or ceramic, which is called an insulator. Insulators play two basic roles in overhead transmission lines, namely supporting the conductors and preventing the current from returning to the ground. These two roles must be guaranteed. Insulators should not fail due to flashover breakdown caused by changes in environmental and electrical load conditions. Otherwise, the insulator will lose its function and damage the use and operating life of the entire line. There are many disc-shaped insulators hung on one end of the high-voltage wire connection tower. It is to increase the creepage distance. It is usually made of glass, ceramic or rubber, which is called an insulator. In order to prevent dust and other dirt from adhering to the surface of the insulator, forming a path that is flashed and broken down by the two ends of the insulator, that is, creepage. Therefore, the surface distance, that is, creepage distance, is increased. The distance of discharge along the insulation surface, that is, the leakage distance, is called creepage distance. Creepage distance = surface distance / system maximum voltage. According to the degree of dirtiness, the creepage distance of heavy pollution areas is generally 31 mm / kilovolt. Zero-value insulator refers to an insulator whose potential distribution at both ends of the insulator is close to zero or equal to zero during operation. The impact of zero-value or low-value insulators: The insulation of the line conductor depends on the insulator. Due to manufacturing defects or external effects, such as: the surface of the insulator is too dirty, lightning strikes, etc. The insulation performance of the insulator will continue to deteriorate. When the insulation resistance is reduced or zero, it is called a low-value or zero-value insulator. The insulator is smooth and can reduce the capacitive reactance between the wires to reduce the loss of current.

[0003] With the construction of UHV AC and DC lines in my country and the increasing requirements for mechanical strength, the problems of pure porcelain post insulators are becoming more and more prominent, especially in UHV DC converter stations, which are mainly manifested in:

[0004] ① External insulation problem. As the operating environment deteriorates, the anti-pollution flashover capability of porcelain post insulators is insufficient. For UHV DC, pure porcelain post insulators require large creepage distance and structure, while post insulators that are too high are difficult to achieve strong bending and seismic strength.

[0005] ② Earthquake resistance. High-voltage equipment with porcelain post insulators as insulating components is referred to as porcelain-type high-voltage equipment. The earthquake resistance of this type of equipment has always been difficult to solve. In the 2008 Wenchuan earthquake, most of the damage to high-voltage equipment was caused by porcelain bushing breakage. For UHV DC systems, the requirements for post insulators used for smoothing reactors are

[0006] The overall height is 12m and the supporting mass is 40t. The converter station is located in Chuxiong, Yunnan, an earthquake-prone area. Obviously, it is very difficult for porcelain post insulators to meet the earthquake resistance requirements.

[0007] ③ Manufacturing quality issues. Porcelain post insulators are difficult to manufacture due to their own complex process, equipment conditions, raw material quality issues and other limitations.

[0008] Based on a large number of investigations, the team counted the accidents of porcelain post insulators according to technical reasons and found that the causes of porcelain post insulator accidents were

[0009] The conclusion is that the majority of the reasons are due to product quality.

[0010] The overall terrain of Xinjiang is "three mountains and two basins". The Tarim Basin is between the Kunlun Mountains and the Tianshan Mountains, and the Junggar Basin is between the Tianshan Mountains and the Altai Mountains. The special topography has made many places in Xinjiang the "wind outlets" of the motherland. The wind resources in the nine wind zones in Xinjiang are equivalent to four and a half Three Gorges Power Stations. The strong and fast winds have become a major distinctive feature of Xinjiang that distinguishes it from other provinces. The wind in Alashankou is incredibly strong. People in Alashankou say with pride that if you don't go to Xinjiang, you don't know how big China is, and if you don't go to Alashankou, you don't know how strong the wind is. This is very true. It is said that it is China's wind reservoir, and it is China's top wind reservoir. Although this is a very vivid metaphor, it is very appropriate for Alashankou, which is sandwiched between the Alatoo Mountains and the Balruk Mountains. There are wind spirits in Alashankou, and levels 5 and 6 are not considered wind. Levels 7 and 8 are small winds, and level 18 strong winds are also ordinary. Every year, there are more than 180 days of strong winds above level 8 in Alashankou, with the maximum wind speed reaching 55 meters per second, which is more fierce than a level 12 typhoon. This wind outlet is a narrow valley with no end in sight, empty and vast. It is this special phenomenon that makes the huge airflows coming from the Arctic Ocean surge. Over the years, the airflow from Central Asia to Xinjiang has gathered strong energy and rushed straight to Alashankou. From this wind outlet, it spreads, releases, and advances with incomparable ferocity, rushing to the distant Pacific Ocean, and merges with the warm Pacific monsoon, just like the galloping iron cavalry of thousands of horses, which is unstoppable. "There is a wind every year, from spring to winter, the wind blows the stones away, and the birds can't fly." It is more appropriate to use such a catchy folk song to describe the special concreteness of the strong wind in Alashankou. Summary of the invention

[0011] The purpose of the present invention is to provide a pillar-type windproof insulator to solve the above-mentioned problem. A pillar-type windproof insulator comprises an insulator body, an umbrella skirt is arranged on the insulator body, a wire-releasing groove is arranged at the upper end of the insulator body, windproof walls are arranged on both sides of the wire-releasing groove, and a wire loading port is arranged above the wire-releasing groove, and the wire loading port is smaller than the wire-releasing groove. It can withstand 8-10 level strong winds, is safer and more reliable to use in strong wind areas, and has a long service life. Furthermore, a fixing bracket is arranged at the lower end of the insulator body, and an adhesive is arranged between the fixing bracket and the insulator body. The insulator body and the fixing bracket are installed more firmly.

[0012] Furthermore, a gasket is provided at the connection between the bottom of the insulator body and the fixing bracket, and a fixing column is provided at the bottom of the fixing bracket, so that the insulator can be more firmly installed and used.

[0013] Furthermore, two fixing posts are provided, and a fixing sheet is provided between the two fixing posts. The insulator is installed more firmly on the high-voltage wire support.

[0014] Furthermore, the inner wall of the wire laying groove is provided with anti-skid protrusions, which can reduce the sliding and friction of the wires, reduce the loss, and extend the service life of the insulator and the wires.

[0015] Furthermore, an anti-skid pad is provided on the anti-skid protrusion, so as to reduce the sliding and friction of the wire, reduce the loss, and extend the service life of the insulator and the wire.

[0016] Furthermore, the outer wall of the windproof wall is provided with wall threads, so that the binding rope can be prevented from falling off when the high-voltage wire is bound to the top of the insulator.

[0017] Furthermore, the windproof wall is matched with a wire fixing cap, the top of the wire fixing cap is hemispherical, a wind speed detection part is arranged on the top of the wire fixing cap, a compression head is arranged on the top of the inner top of the wire fixing cap, a compression pad is arranged on the lower end of the compression head, and a cap thread is arranged on the inner side wall of the wire fixing cap, and the cap thread matches the wall thread. It is more convenient to fix the wires with the wire fixing cap, the wind speed can be tested in real time, and it is convenient for maintenance and overhaul. The hemispherical wire fixing cap can prevent dust accumulation and freezing on the top of the insulator, increase safety, and extend service life.

[0018] Furthermore, the insulator body is provided with an inner shaft, and a windproof sleeve is provided outside the inner shaft. The windproof sleeve is in the shape of a hollow elliptical column, and the protruding radius of the windproof sleeve is larger on one side than on the other side. The windproof sleeve is rotatably connected to the inner shaft, and a windproof umbrella skirt is provided on the windproof sleeve. Both sides of the windproof umbrella skirt are elliptical, and the protruding radius of the windproof umbrella skirt is larger on one side than on the other side. The windproof sleeve is a rotatable mechanical streamline, and can be rotated to a streamlined direction with the wind direction in strong winds, thereby reducing resistance, reducing wind damage to the insulator, and preventing the insulator from being broken by strong winds. During the process of the windproof sleeve rotating with the wind direction, the wind force of the centrifuge in different directions also causes the pushed dust and rain to slide off, preventing dust accumulation and freezing, further increasing safety, and extending the service life of the insulator.

[0019] Furthermore, at least one shed is provided at the upper end and the lower end of the inner shaft, and the windproof sleeve is provided between the upper shed and the lower shed to protect the windproof sleeve and prevent rainwater from entering the windproof sleeve and causing the risk of high-voltage breakdown.

[0020] During production, the insulator body with inner shaft is first made of medium-strength porcelain raw materials, including the insulator body, the upper and lower umbrella skirts of the insulator body, the wire slot and windproof wall at the upper end of the insulator body, etc., and then the glaze layer is applied on the finished body, and then the isolation layer, such as linoleum paper, is wrapped on the inner shaft, and the enamel layer is applied on the isolation layer. The surface of the enamel layer is used to make the body of the windproof sleeve, and the glaze layer of the windproof sleeve is applied after it is made, and finally it is put into the kiln for calcination, and the isolation layer in the middle is burned off. The enamel layer between the inner shaft and the windproof sleeve is in contact, the friction is small, and the rotation is flexible.

[0021] Beneficial effects:

[0022] 1. The setting of the wire trough and windproof wall makes the insulator suitable for use in windy areas. It is easy to install, can withstand 8-10 level strong winds, is safe and reliable, and has a long service life.

[0023] 2. The fixing column ensures that the insulator is firmly installed, and the anti-skid protrusions and anti-skid pads prevent sliding and friction loss between the wires and the insulators, thus extending the service life of the insulators and wires.

[0024] 3. The wire cap can fix the wires firmly and more conveniently. The hemispherical wire cap can prevent dust accumulation and freezing, increase safety and extend service life.

[0025] 4. The windproof sleeve is a rotatable mechanical streamline. In strong winds, it can rotate to a streamlined direction with the wind direction to reduce resistance, reduce wind damage to insulators, and prevent insulators from being broken by strong winds. During the rotation of the windproof sleeve with the wind direction, the wind force in different directions of the centrifuge also causes the pushed dust and rain to slide off, preventing dust accumulation and freezing, further increasing safety, and extending the service life of the insulator.

[0026] 5. The wind speed detection part on the wire cap can test the wind speed in real time, which is convenient for maintenance and repair.

[0027] 6. It can be widely used in plateaus and desert wind outlets, seaside typhoons or places with strong winds. It can prevent power lines from falling and other harsh environments, greatly reducing the occurrence of accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic cross-sectional view of the present invention;

[0029] Figure 2 Schematic diagram of the cross section of the national standard parts of the prior art;

[0030] Figure 3 A schematic cross-sectional view of the upper end of an insulator according to an embodiment of the present invention;

[0031] Figure 4 A schematic cross-sectional view of the lower end of an insulator according to an embodiment of the present invention;

[0032] Figure 5 A schematic front cross-sectional view of a wire cap according to the present invention;

[0033] Figure 6 A schematic front cross-sectional view of the windproof sleeve structure of the present invention;

[0034] Figure 7 A schematic diagram of a top cross-sectional view of the windproof sleeve structure of the present invention;

[0035] Figure 8 Product dimensions, lightning resistance, and withstand voltage test results of the embodiment of the present invention;

[0036] Fig. 9 Graph showing the test results of bending failure stress and temperature tolerance of the product according to the embodiment of the present invention

[0037] Among them, 1-insulator body, 2-umbrella skirt, 3-fixing bracket, 4-wire groove, 5-windproof wall, 6-wire cap, 7-windproof sleeve, 11-inner shaft, 31-adhesive, 32-gasket, 33-fixing column, 34-spring washer, 35-fixing plate, 36-nut, 51-wire loading port, 52-anti-slip protrusion, 53-anti-slip pad, 54-wall thread, 61-compression head, 62-compression pad, 63-cap thread, 64-wind speed detection part, 71-windproof umbrella skirt. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0039] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0040] Example 1

[0041] As attached Figure 1 As shown, a pillar-type windproof insulator is made of medium-strength porcelain, including an insulator body 1, an umbrella skirt 2 is arranged on the insulator body 1, a wire-releasing groove 4 is arranged on the upper end of the insulator body 1, windproof walls 5 are arranged on both sides of the wire-releasing groove 4, a wire loading port 51 is arranged above the wire-releasing groove 4, and the wire loading port 51 is smaller than the diameter of the wire-releasing groove 4, a KTH370-10 iron cap fixing bracket 3 is arranged at the lower end of the insulator body 1, and an adhesive 31 made of 525# cement and washed sand concrete is arranged between the fixing bracket 3 and the insulator body 1, a felt paper gasket 32 ​​is arranged at the connection between the bottom of the insulator body 1 and the fixing bracket 3, and a fixing column 33 is arranged at the bottom of the fixing bracket 3, and the fixing column 33 is matched with a spring washer 34, a fixing plate 35, and a nut 36. First, the spring washer 34 is inserted into the fixing column 33, and then the fixing column 33 is inserted into the hole to be installed, the fixing plate 35 is put on, the nut 36 is tightened, and the wire is put into the wire-releasing groove 4 to fix it.

[0042] The insulators made in this embodiment were tested Figure 8-Figure 9 The results show that the size, lightning resistance, withstand voltage, bending failure stress, and temperature tolerance are in line with the national GB / T1001.1 and GB / T21206-2007 standards, mechanical bending failure load: 12.5kN, power frequency wet withstand voltage: 50kV, lightning impulse withstand voltage: 125kV, nominal creepage distance: 400mm, and wind resistance ≥ 8 levels. It was tested in the Alashan area of ​​Xinjiang and can be used safely in 8-level gale conditions without any damage.

[0043] It can be widely used in plateaus and shamo wind outlets, seaside areas with typhoons or strong winds, and can prevent power lines from falling and other harsh environments, greatly reducing the occurrence of accidents.

[0044] Example 2

[0045] This embodiment combines Embodiment 1 and Figure 3 Figure 4 On the basis of Example 1, two fixing columns 33 are provided, a fixing sheet 35 is provided between the two fixing columns 33, an anti-skid protrusion 52 is provided on the inner wall of the wire placing groove 4, an anti-skid pad 53 is provided on the anti-skid protrusion 52, and a wall thread 54 is provided on the outer wall of the windproof wall 5. The wire is placed in the anti-skid pad 53 and fixed.

[0046] This embodiment is more firmly installed, reduces sliding and friction of wires, reduces losses, extends the service life of insulators and wires, and has a better windproof effect.

[0047] Example 3

[0048] This embodiment combines Embodiment 2 and Figure 5 On the basis of Example 2, the windproof wall 5 is matched with a wire cap 6, the top of the wire cap 6 is hemispherical, the top of the wire cap 6 is provided with a wind speed detection unit 64 of the GT8907 wind force monitor produced by Shenzhen Jumaoyuan Technology Co., Ltd., a compression head 61 is provided at the top of the wire cap 6, a compression pad 62 is provided at the lower end of the compression head 61, and a cap thread 63 is provided on the inner side wall of the wire cap 6, and the cap thread 63 matches the wall thread 54. Put the wire into the anti-slip pad 53, cover the wire cap 6 and tighten it.

[0049] This embodiment makes it more convenient to fix the wires, can test the wind speed in real time, and is convenient for maintenance and inspection. The hemispherical wire cap can prevent dust accumulation and freezing, thereby increasing safety and extending service life.

[0050] Example 4

[0051] This embodiment combines Embodiment 1 and Figure 6 Figure 7 On the basis of Example 1, the insulator body 1 is provided with an inner shaft 11, and a windproof sleeve 7 is provided outside the inner shaft 11. The windproof sleeve 7 is a hollow elliptical column, and the protruding radius of the windproof sleeve 7 on one side is larger than the other side. The windproof sleeve 7 is rotatably connected to the inner shaft 11, and a windproof umbrella skirt 71 is provided on the windproof sleeve 7. Both sides of the windproof umbrella skirt 71 are elliptical, and the protruding radius of the windproof umbrella skirt 71 on one side is larger than the other side. The windproof sleeve 7 and the windproof umbrella skirt 71 are both made of porcelain and are directly formed during firing.

[0052] During the production, the insulator body 1 with the inner shaft 11 is firstly made of medium-strength porcelain raw materials, including the insulator body 1, the sheds 2 at the upper and lower ends of the insulator body 1, the wire slot 4 at the upper end of the insulator body 1, the windbreak 5, etc., and then a glaze layer is applied on the prepared body, and then an isolation layer such as linoleum paper is wrapped on the inner shaft 11, and then an enamel layer is applied on the isolation layer.

[0053] The surface of the coated enamel layer is used to make the embryo of the windproof cover 7, and then the glaze layer of the windproof cover 7 is coated after it is done, and finally it is calcined in a kiln, and the isolation layer in the middle is burned off. The enamel layer between the inner shaft 11 and the windproof cover 7 is in contact, the friction force is small, and the rotation is flexible.

[0054] The windproof sleeve is mechanically streamlined. In strong winds, it can rotate in a streamlined direction with the wind direction to reduce resistance, reduce wind damage to insulators, and prevent insulators from being blown off by strong winds. During the process of the windproof sleeve rotating with the wind direction, the wind force in different directions of the centrifuge also causes the pushed dust and rainwater to slide off, preventing dust accumulation and freezing, further increasing safety, and extending the service life of the insulator.

[0055] Example 5

[0056] This embodiment is combined with Embodiment 4. On the basis of Embodiment 4, an umbrella skirt 2 is respectively provided at the upper and lower ends of the inner shaft 11, and a windproof cover 7 is provided between the upper umbrella skirt 2 and the lower umbrella skirt 2, both of which are made of porcelain and are directly formed during firing.

[0057] The windshield is protected to prevent rainwater from entering the windshield and causing the risk of high voltage breakdown, thereby increasing the safety of the insulator.

[0058] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the present invention.

[0059] within the scope of protection.

Claims

1. A pillar type windproof insulator, characterized in that: The invention comprises an insulator body (1), wherein an umbrella skirt (2) is arranged on the insulator body (1), a wire laying groove (4) is arranged at the upper end of the insulator body (1), windproof walls (5) are arranged on both sides of the wire laying groove (4), a wire loading opening (51) is arranged above the wire laying groove (4), and the wire loading opening (51) is smaller than the wire laying groove (4), a fixing bracket (3) is arranged at the lower end of the insulator body (1), and adhesive (31) is arranged between the fixing bracket (3) and the insulator body (1), a gasket (32) is arranged at the connection between the bottom of the insulator body (1) and the fixing bracket (3), a fixing column (33) is arranged at the bottom of the fixing bracket (3), and two fixing columns (33) are arranged, wherein the fixing columns (33) are provided with a plurality of fixing columns, and the fixing columns (33) are provided with a plurality of fixing columns. A fixing plate (35) is arranged between the two fixing columns (33); the insulator body (1) is provided with an inner shaft (11); a windproof sleeve (7) is arranged outside the inner shaft (11); the windproof sleeve (7) is in the shape of a hollow elliptical column; the protruding radius of the windproof sleeve (7) is larger on one side than on the other side; the windproof sleeve (7) is rotatably connected to the inner shaft (11); a windproof shed (71) is arranged on the windproof sleeve (7); both sides of the windproof shed (71) are elliptical; the protruding radius of the windproof shed (71) is larger on one side than on the other side; at least one shed (2) is arranged at the upper end and the lower end of the inner shaft (11); the windproof sleeve (7) is arranged between the upper shed (2) and the lower shed (2); The inner wall of the wire-releasing groove (4) is provided with an anti-slip protrusion (52); An anti-slip pad (53) is provided on the anti-slip protrusion (52); The outer wall of the windproof wall (5) is provided with a wall thread (54); The windproof wall (5) is matched with a wire fixing cap (6), the top of the wire fixing cap (6) is hemispherical, a wind speed detection part (64) is arranged on the top of the wire fixing cap (6), a compression head (61) is arranged on the top of the inner part of the wire fixing cap (6), a compression pad (62) is arranged on the lower end of the compression head (61), and a cap thread (63) is arranged on the inner side wall of the wire fixing cap (6), and the cap thread (63) matches the wall thread (54).

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