CN213781727U

CN213781727U - Heavy-load medium-voltage lightning arrester

Info

Publication number: CN213781727U
Application number: CN202022952780.3U
Authority: CN
Inventors: 武育安
Original assignee: Xi'an Xiangtai Electric Co ltd
Current assignee: Xi'an Xiangtai Electric Co ltd
Priority date: 2020-12-08
Filing date: 2020-12-08
Publication date: 2021-07-23
Anticipated expiration: 2030-12-08

Abstract

The utility model relates to an arrester technical field, and a heavy load middling pressure arrester is disclosed, including the urceolus, the equal fixedly connected with baffle in both sides about the inside of urceolus, the through-hole has all been seted up and has passed through hole fixedly connected with electrode in the upper end of two baffles, the equal fixedly connected with conducting rod in the opposite direction one end of two electrodes, be equipped with the valve block group between two baffles, and the upper and lower both ends of valve block group respectively with two conducting rod opposite direction one end fixed connection, the outside cover of valve block group is equipped with first insulation cover, the upper and lower both ends of first insulation cover respectively with two baffle opposite direction one end fixed connection. The utility model discloses can reduce the instantaneous current volume when contacting with the disk group, avoid causing the arrester to damage because of instantaneous load is too big, can seal protection to two binding post departments simultaneously, further reduce the possibility of outside and binding post contact, improve the security of using.

Description

Heavy-load medium-voltage lightning arrester

Technical Field

The utility model relates to a lightning arrester technical field especially relates to a heavy load middling pressure lightning arrester.

Background

The lightning arrester is equipment that protected equipment of transformer substation avoids thunder and lightning impulse to attack, and when the thunder and lightning impulse that transmits into the transformer substation along the circuit surpassed the lightning arrester protection level, the lightning arrester was discharged at first to introduce the lightning current through good conductor safety to the ground, utilize earthing device to make the lightning voltage amplitude limit below protected equipment thunder and lightning impulse level, make electrical equipment protected.

At present, the core of the metal oxide medium voltage arrester is that a zinc oxide valve plate is used, and the zinc oxide valve plate has ideal nonlinear volt-ampere characteristics, but when external lightning causes overvoltage and the overvoltage generated when an electric power system operates is overlarge, instantaneous current when the zinc oxide valve plate is contacted with the instantaneous current is overlarge, so that the medium voltage arrester is easily damaged and is not beneficial to daily use of the medium voltage arrester, and therefore, the heavy load medium voltage arrester is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving among the prior art when the excessive pressure that produces when externally thunder and lightning leads to excessive pressure and electric power system operation is too big, instantaneous current when contacting with the zinc oxide valve block is too big, easily causes the damage of middling pressure arrester, is unfavorable for the problem of daily use of middling pressure arrester, and the heavy load middling pressure arrester that provides.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a heavy-load medium-voltage arrester comprises an outer barrel, wherein the upper side and the lower side of the inner part of the outer barrel are fixedly connected with clapboards, the upper ends of the two clapboards are respectively provided with a through hole and are fixedly connected with electrodes through the through holes, the opposite ends of the two electrodes are respectively fixedly connected with a conducting rod, a valve block group is arranged between the two clapboards, the upper end and the lower end of the valve block group are respectively fixedly connected with the opposite ends of the two conducting rods, the outer side of the valve block group is sleeved with a first insulating sleeve, the upper end and the lower end of the first insulating sleeve are respectively fixedly connected with the opposite ends of the two clapboards, a first current-equalizing ring is fixedly arranged above the inner part of the first insulating sleeve, the inner side wall of the first current-equalizing ring is fixedly connected with the rod wall of the conducting rod at the same side, the middle position of the inner part of the first insulating sleeve is fixedly connected with a second current-equalizing ring, and the inner side wall of the second current-equalizing ring is fixedly sleeved with the side wall of the valve block group, a plurality of evenly distributed shunt rods are fixedly arranged between the first current sharing ring and the second current sharing ring, two connecting terminals are fixedly connected to the opposite ends of the electrodes, penetrate through the upper end and the lower end of the outer barrel respectively, and extend to the outside.

Preferably, two one side that binding post is located the urceolus outside all overlaps and is equipped with the internal thread cover, and two internal thread cover one end in opposite directions respectively with the upper and lower both ends fixed connection of urceolus, two the equal threaded connection of inside wall of internal thread cover has a sealed cowling, two the equal fixedly connected with annular sealing strip of the opposite one end of sealed cowling, two lead to the line hole has all been seted up to the opposite one end of sealed cowling, and two lead to the inside in line hole and all fixedly be equipped with annular rubber pad.

Preferably, two the one end outside that binding post is located two baffle outsides all is equipped with the insulating cover of second, two the insulating cover of second is located respectively and fixes the setting between two opposite one sides of baffle and the urceolus inside wall.

Preferably, the left side of the upper end of the outer barrel is fixedly connected with an air inlet pipe, the upper end of the outer side wall of the air inlet pipe is in threaded connection with a sealing cover, the left side and the right side of the upper end of each of the two partition plates are provided with air vents, and sulfur hexafluoride gas is filled in gaps between the inner side wall of the outer barrel and the two second insulating sleeves and between the inner side wall of the outer barrel and the first insulating sleeves.

Preferably, the equal fixedly connected with bracing piece in the lower extreme left and right sides of urceolus, and the equal fixedly connected with mount pad of lower extreme of two bracing pieces, two equal threaded connection in one side opposite in upper end of mount pad has a set of construction bolt.

Preferably, the inner rings of the two annular rubber pads are both arranged in a conical shape, and the two annular rubber pads are symmetrically arranged relative to the horizontal center line of the outer barrel.

Compared with the prior art, the utility model provides a heavy load middling pressure arrester possesses following beneficial effect:

1. this heavy load middling pressure arrester, through the urceolus that is equipped with, two baffles, two electrodes, mutually supporting of two binding post and valve block group, can protect electrical equipment, through the first current sharing ring that is equipped with, mutually supporting of second current sharing ring and a plurality of reposition of redundant personnel pole, can shunt the leading-in electric current of conducting rod of upside, when the excessive pressure that produces when outside thunder and lightning leads to excessive pressure and electric power system operation, instantaneous current volume when can reducing and the contact of valve block group, avoid damaging because of instantaneous load excessively causes the arrester, improve the life of arrester.

2. This heavy load middling pressure arrester through the first insulating cover and two second insulating covers that are equipped with, can carry out insulation protection, through mutually supporting of two internal thread covers, two sealed cowlings, two annular sealing strips and two annular rubber pads that are equipped with, can seal protection two binding post departments, further reduce the possibility of outside and binding post contact, improve the security performance, through the intake pipe that is equipped with, can be with the inside sulfur hexafluoride protective gas that fills of urceolus.

The part that does not relate to in the device all is the same with prior art or can adopt prior art to realize, the utility model discloses instantaneous current volume when can reducing and the contact of valve block group avoids causing the arrester to damage because of instantaneous load is too big, can seal the protection to two binding post departments simultaneously, further reduces the possibility of outside and binding post contact, improves the security of using.

Drawings

Fig. 1 is a schematic structural view of a heavy-load medium-voltage arrester according to the present invention;

fig. 2 is an enlarged view of a portion a of fig. 1.

In the figure: the device comprises an outer cylinder 1, a partition plate 2, electrodes 3, a conducting rod 4, a valve plate group 5, a first insulating sleeve 6, a first current-sharing ring 7, a second current-sharing ring 8, a wiring terminal 9, an internal thread sleeve 10, a sealing cover 11, an annular sealing strip 12, an annular rubber pad 13, a second insulating sleeve 14, an air inlet pipe 15, a supporting rod 16, an installation seat 17, an installation bolt 18 and a shunt rod 19.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-2, a heavy load medium voltage arrester comprises an outer cylinder 1, wherein the upper and lower sides of the inside of the outer cylinder 1 are fixedly connected with partition plates 2, the upper ends of the two partition plates 2 are respectively provided with a through hole and fixedly connected with electrodes 3 through the through holes, the opposite ends of the two electrodes 3 are respectively fixedly connected with conducting rods 4, a valve block group 5 is arranged between the two partition plates 2, the upper and lower ends of the valve block group 5 are respectively fixedly connected with the opposite ends of the two conducting rods 4, the outer side of the valve block group 5 is sleeved with a first insulating sleeve 6, the upper and lower ends of the first insulating sleeve 6 are respectively fixedly connected with the opposite ends of the two partition plates 2, a first current equalizing ring 7 is fixedly arranged above the inside of the first insulating sleeve 6, the inner side wall of the first current equalizing ring 7 is fixedly connected with the rod wall of the conducting rod 4 on the same side, a second current equalizing ring 8 is fixedly connected at the middle position of the inside of the first insulating sleeve 6, and the inside wall of the second current sharing ring 8 is fixedly sleeved with the side wall of the valve plate group 5, a plurality of uniformly distributed shunt rods 19 are fixedly arranged between the first current sharing ring 7 and the second current sharing ring 8, one ends of the two electrodes 3 opposite to each other are fixedly connected with connecting terminals 9, and the two connecting terminals 9 respectively penetrate through the upper end and the lower end of the outer barrel 1 and extend to the outside.

The inner thread sleeves 10 are sleeved on one sides of the two wiring terminals 9 positioned outside the outer barrel 1, opposite ends of the two inner thread sleeves 10 are fixedly connected with the upper end and the lower end of the outer barrel 1 respectively, the inner side walls of the two inner thread sleeves 10 are in threaded connection with sealing covers 11, opposite ends of the two sealing covers 11 are fixedly connected with annular sealing strips 12, opposite ends of the two sealing covers 11 are provided with through holes, annular rubber pads 13 are fixedly arranged inside the through holes, before wiring, cables penetrate through the through holes in the sealing covers 11 at corresponding positions, the sealing performance between the sealing covers 11 and the cables can be ensured by the annular rubber pads 13, the sealing covers 11 are screwed into the inner thread sleeves 10 at corresponding positions, the annular sealing strips 12 are extruded, so that the sealing of the wiring terminals 9 can be ensured, and the possibility of contact between the outside and the wiring terminals 9 is further reduced, the use safety is improved.

The one end outside that two binding post 9 are located two baffles 2 outsides all is equipped with the insulating cover of second 14, and two insulating covers of second 14 are located respectively and fix the setting between two opposite one sides of baffle 2 and the urceolus 1 inside wall, can be located the inside position of urceolus 1 to two electrodes 3 and two binding post 9 and carry out insulation protection.

The upper end left side fixedly connected with intake pipe 15 of urceolus 1, and threaded connection has sealed lid on the lateral wall of intake pipe 15, and the air vent has all been seted up to the upper end left and right sides of two baffles 2, and the clearance packing between the inside wall of urceolus 1 and two insulating cover 14 of second and first insulating cover 6 has sulfur hexafluoride gas, can be to the inside sulfur hexafluoride protective gas that fills of urceolus 1 through intake pipe 15.

The equal fixedly connected with bracing piece 16 of the lower extreme left and right sides of urceolus 1, and the equal fixedly connected with mount pad 17 of the lower extreme of two bracing pieces 16, the equal threaded connection in the opposite one side in upper end of two mount pads 17 has a set of construction bolt 18, can be convenient for carry out stable installation to urceolus 1.

The inner rings of the two annular rubber pads 13 are both arranged in a conical shape, and the two annular rubber pads 13 are symmetrically arranged relative to the horizontal center line of the outer barrel 1, so that the sealing performance of a cable passing through the annular rubber pads 13 is improved.

In the utility model, when in use, when overvoltage is caused by external thunder and overvoltage is generated during operation of the power system, current enters through the wiring terminal 9 at the upper side and is led into the valve block group 5 through the electrode 3 and the conducting rod 4 at the upper side, part of the current on the conducting rod 4 at the upper side is shunted by the first current equalizing ring 7 before entering the valve block group 5, and is led into the second current equalizing ring 8 through the plurality of shunting rods 19, and the current is led into the valve block group 5 by the second current equalizing ring 8 and is led out from the conducting rod 4, the electrode 3 and the wiring terminal 9 at the lower side so as to protect the electrical equipment, because the current is shunted out of one part before contacting the valve block group 5, thereby when overvoltage is generated during operation of the external thunder and the power system, the instantaneous current amount when contacting the valve block group 5 can be reduced, and damage caused by the overlarge instantaneous load is avoided, the service life of the lightning arrester is prolonged.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A heavy-load medium-voltage arrester comprises an outer barrel (1) and is characterized in that partition plates (2) are fixedly connected to the upper side and the lower side of the interior of the outer barrel (1), through holes are formed in the upper ends of the two partition plates (2), electrodes (3) are fixedly connected to the upper ends of the two partition plates (2), opposite ends of the two electrodes (3) are fixedly connected with conducting rods (4), a valve piece group (5) is arranged between the two partition plates (2), the upper end and the lower end of the valve piece group (5) are fixedly connected with opposite ends of the two conducting rods (4), a first insulating sleeve (6) is sleeved on the outer side of the valve piece group (5), the upper end and the lower end of the first insulating sleeve (6) are fixedly connected with opposite ends of the two partition plates (2), a first current-equalizing ring (7) is fixedly arranged above the interior of the first insulating sleeve (6), the inner side wall of the first current-equalizing ring (7) is fixedly connected with the rod walls of the conducting rods (4) at the same side, the inside intermediate position fixedly connected with second current sharing ring (8) of first insulating cover (6), and the inside wall of second current sharing ring (8) and the lateral wall of valve block group (5) are fixed to be cup jointed, fixed reposition of redundant personnel pole (19) that are equipped with a plurality of evenly distributed between first current sharing ring (7) and second current sharing ring (8), two the equal fixedly connected with binding post (9) of the opposite one end of electrode (3), and two binding post (9) run through the upper and lower both ends of urceolus (1) respectively and extend to the outside.

2. The heavy load medium voltage arrester as claimed in claim 1, wherein one side of each of the two connecting terminals (9) located outside the outer cylinder (1) is sleeved with an internal thread sleeve (10), opposite ends of the two internal thread sleeves (10) are fixedly connected with the upper end and the lower end of the outer cylinder (1), inner side walls of the two internal thread sleeves (10) are respectively and threadedly connected with a sealing cover (11), opposite ends of the two sealing covers (11) are respectively and fixedly connected with an annular sealing strip (12), opposite ends of the two sealing covers (11) are respectively provided with a through hole, and an annular rubber gasket (13) is fixedly arranged inside each of the two through holes.

3. A heavy load medium voltage arrester as claimed in claim 1, characterized in that the two terminal blocks (9) are provided with a second insulating sleeve (14) at the outer side of the two partition plates (2), and the two second insulating sleeves (14) are respectively fixedly arranged between the opposite sides of the two partition plates (2) and the inner side wall of the outer cylinder (1).

4. The heavy load medium voltage arrester as claimed in claim 3, wherein the left side of the upper end of the outer cylinder (1) is fixedly connected with an air inlet pipe (15), the upper end of the outer side wall of the air inlet pipe (15) is in threaded connection with a sealing cover, the left and right sides of the upper end of the two partition plates (2) are provided with vent holes, and the gap between the inner side wall of the outer cylinder (1) and the two second insulating sleeves (14) and the first insulating sleeve (6) is filled with sulfur hexafluoride gas.

5. The heavy load medium voltage arrester as claimed in claim 1, wherein the left and right sides of the lower end of the outer cylinder (1) are fixedly connected with supporting rods (16), the lower ends of the two supporting rods (16) are fixedly connected with mounting seats (17), and the opposite sides of the upper ends of the two mounting seats (17) are respectively in threaded connection with a set of mounting bolts (18).

6. A heavy load medium voltage arrester according to claim 2 characterized in that the inner rings of both of the annular rubber mats (13) are arranged conically and that both annular rubber mats (13) are arranged symmetrically with respect to the horizontal centre line of the outer cylinder (1).