CN213660275U - Lightning protection type isolating switch - Google Patents

Abstract

The utility model discloses a lightning protection type isolating switch, which comprises a base, wherein both sides of the top end of the base are respectively provided with a lightning protection insulator, the top ends of the two lightning protection insulators are respectively provided with a connecting terminal, one side of the top end of one of the connecting terminals is rotatably connected with a knife switch, one side of the knife switch is connected with a static contact seat at the top end of the other connecting terminal in a clamping way, cavities are arranged inside the two lightning protection insulators, channels are arranged at the bottoms inside the two lightning protection insulators, pressure relief holes are arranged at the bottoms of the outer walls of the two lightning protection insulators, sealing blocks are connected inside the two pressure relief holes in a sliding way, and pressure relief grooves are arranged at the tops and the bottoms of the outer walls of the two sealing blocks, so that high-pressure flue gas in the utility model enters the channels from the cavities and pushes the sealing blocks to move towards the direction, and release the pressure release hole with sealed piece, the high-pressure flue gas is discharged through the pressure release groove, avoids leading to the inside pressure of lightning protection insulator too high because the high-pressure flue gas can't in time be discharged.

Description

Lightning protection type isolating switch

Technical Field

The utility model relates to an isolator, in particular to lightning protection type isolator.

Background

An isolating switch (commonly called as a knife switch) generally refers to a high-voltage isolating switch, namely an isolating switch with rated voltage of 1kV or more, usually called as an isolating switch for short, is the most used electrical appliance in high-voltage switching electrical appliances, and has simple working principle and structure. The main characteristic of the isolating switch is that it has no arc-extinguishing capability, and can only open and close the circuit under the condition of no load current. The isolating switch is used for each stage of voltage, is used for changing circuit connection or isolating lines or equipment from a power supply, has no current-breaking capacity, and can be operated only after other equipment is used for disconnecting the lines. Typically with an interlock to prevent inadvertent operation of the switch when loaded, a pin is sometimes required to prevent opening of the switch under the magnetic force of a large fault.

The existing isolating switch has some defects, the existing insulator is lack of a pressure relief structure, so that high-pressure smoke generated by instantaneous strong arc combustion of lightning voltage is released everywhere in time, the shell of the insulator is easy to damage, and meanwhile, in the process of diffusing the high-pressure smoke in the shell, smoke falls on the surfaces of other parts, so that the normal function and the service life of the parts are easy to influence, and the lightning protection type isolating switch is provided based on the situation.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a lightning protection type isolator to solve the insulator on the isolator that proposes among the above-mentioned background art and lack the pressure release structure, the problem of the unable timely release of high-pressure flue gas.

In order to achieve the above object, the utility model provides a following technical scheme: lightning protection type isolator, the on-line screen storage device comprises a base, the both sides on base top all are equipped with lightning protection insulator, two lightning protection insulator's top all is equipped with binding post, and one side on one of them binding post top is rotated and is connected with the plug-in strip, one side of plug-in strip is connected, two with the stationary contact block on another binding post top lightning protection insulator's inside all is equipped with the cavity, two the passageway has all been seted up, two to the inside bottom of lightning protection insulator the passageway communicates each other with the cavity that corresponds respectively, two the pressure release hole has all been seted up, two to the bottom of lightning protection insulator outer wall the pressure release hole communicates each other with the passageway.

As a preferred technical scheme of the utility model, two the equal sliding connection in inside in pressure release hole has sealed piece, two one side of sealed piece respectively with be located the inside of corresponding passageway, and the sealed piece is located the inside one end of passageway and is the inclined plane.

As an optimized technical scheme of the utility model, two the pressure relief groove has all been seted up to the top and the bottom of sealed piece outer wall.

As a preferred technical scheme of the utility model, two the bottom of sealed piece one side is all fixed and is equipped with the fixed plate, two the middle part of fixed plate one side is all fixed and is equipped with the spring, two the one end of spring respectively with the lateral wall fixed connection who corresponds the passageway.

As a preferred technical scheme of the utility model, the mounting hole has all been seted up, two to the both sides on base top the middle part of lightning protection insulator bottom is the fixed double-screw bolt that is equipped with all, two the double-screw bolt alternates with the mounting hole that corresponds respectively and is connected.

As an optimal technical scheme of the utility model, two the equal threaded connection of outer wall of double-screw bolt has lock nut.

As a preferred technical scheme of the utility model, two breachs, two have been seted up to one side of base the position of breach respectively with the position phase-match that corresponds the mounting hole.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses lightning protection type isolator, through setting up pressure release hole, sealed piece and pressure release groove, the high-pressure flue gas that lightning voltage momentary strong arc burning produced gets into the passageway from the cavity, promote sealed piece to the direction motion of keeping away from the passageway, and release the pressure release hole with sealed piece, the pressure release groove exposes this moment, the high-pressure flue gas is discharged through the pressure release groove, avoid because the high-pressure flue gas can't discharge in time and lead to the too high pressure of lightning protection insulator inside, be favorable to protecting the lightning protection insulator, guarantee the normal work of inside spare part, improve its life;

2. the utility model discloses lightning protection type isolator inserts the inside of mounting hole with the double-screw bolt, can screw or loosen the nut through the breach, need not to fall base and lightning protection insulator, can install and dismantle the lightning protection insulator, makes things convenient for operating personnel's work.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the bottom of the lightning protection insulator of the present invention;

FIG. 3 is a schematic structural view of the fixing plate and the spring in FIG. 2;

fig. 4 is a partially enlarged view of the point B in fig. 1 according to the present invention.

In the figure: 1. a base; 2. a lightning protection insulator; 3. a wiring terminal; 4. a knife switch; 5. a stud; 6. a nut; 7. a notch; 8. a cavity; 9. a channel; 10. a sealing block; 11. a pressure relief vent; 12. a fixing plate; 13. A pressure relief groove; 14. a spring.

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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution of a lightning protection type isolation switch:

according to the figures 1-4, the device comprises a base 1, wherein lightning protection insulators 2 are arranged on two sides of the top end of the base 1, connecting terminals 3 are arranged on the top ends of the two lightning protection insulators 2, one side of the top end of one connecting terminal 3 is rotatably connected with a knife switch 4, one side of the knife switch 4 is connected with a stationary contact seat on the top end of the other connecting terminal 3 in a clamping manner, cavities 8 are arranged inside the two lightning protection insulators 2, channels 9 are arranged at the bottoms inside the two lightning protection insulators 2, the two channels 9 are respectively communicated with the corresponding cavities 8, parts such as a resistor disc, a resistor ring, a discharge electrode and the like are arranged inside the cavities 8, pressure relief holes 11 are arranged at the bottoms of the outer walls of the two lightning protection insulators 2, the two pressure relief holes 11 are respectively communicated with the corresponding channels 9, and high-pressure flue gas generated by instantaneous strong arc combustion of, the phenomenon that the pressure inside the lightning protection insulator 2 is too high due to the fact that high-pressure smoke can not be discharged in time is avoided, the lightning protection insulator 2 is protected, normal work of internal parts is guaranteed, and the service life of the lightning protection insulator is prolonged.

Wherein, the inside of two pressure relief holes 11 is connected with a sealing block 10 in a sliding manner, one side of each sealing block 10 is respectively positioned inside the corresponding channel 9, one end of each sealing block 10 positioned inside the channel 9 is an inclined plane, the inclined plane points to the cavity 8, the top and the bottom of the outer wall of each sealing block 10 are respectively provided with a pressure relief groove 13, high-pressure flue gas enters the channel 9 from the cavity 8, the sealing blocks 10 are pushed to move in the direction away from the channel 9 and push the sealing blocks 10 out of the pressure relief holes 11, at the moment, the pressure relief grooves 13 are exposed, the high-pressure flue gas is discharged through the pressure relief grooves 13, the bottom of one side of each sealing block 10 is respectively and fixedly provided with a fixing plate 12, the middle part of one side of each fixing plate 12 is respectively and fixedly provided with a spring 14, one end of each spring 14 is respectively and fixedly connected with the side wall of the corresponding channel 9, in the process that the sealing blocks 10 are pushed out of the pressure, the spring 14 returns to deform, and the sealing block 10 is retracted to the inside of the pressure relief hole 11.

According to fig. 1 and 4, the mounting hole has all been seted up to the both sides on 1 top of base, the middle part of 2 bottoms of two lightning protection insulators is all fixed and is equipped with double-screw bolt 5, two double-screw bolts 5 alternate with the mounting hole that corresponds respectively and be connected, the equal threaded connection of outer wall of two double-screw bolts 5 has lock nut 6, two breach 7 have been seted up to one side of base 1, the position of two breach 7 respectively with the position phase-match that corresponds the mounting hole, insert the inside of mounting hole with double-screw bolt 5, can screw or loosen nut 6 through breach 7, need not to fall base 1 and lightning protection insulator 2, can install and dismantle lightning protection insulator 2, make things convenient for operating personnel's work.

When in specific use, the lightning protection type isolating switch of the utility model is characterized in that firstly, the stud 5 of the lightning protection insulator 2 is inserted into the mounting hole, the nut 6 can be screwed through the gap 7 without laying down the base 1 and the lightning protection insulator 2, the lightning protection insulator 2 can be installed, high-pressure flue gas generated by instantaneous high-arc combustion of lightning voltage enters the channel 9 from the cavity 8 to push the sealing block 10 to move in the direction far away from the channel 9, and the sealing block 10 is pushed out of the pressure relief hole 11, at the moment, the pressure relief groove 13 is exposed, the high-pressure smoke is discharged through the pressure relief groove 13, the phenomenon that the pressure in the lightning protection insulator 2 is too high due to the fact that the high-pressure smoke cannot be discharged in time is avoided, the spring 14 is compressed when the sealing block 10 is pushed out of the pressure relief hole 11, when the pressure inside the cavity 8 is lower than the pushing force of the spring 14, the spring 14 returns to deform, and finally the sealing block 10 is retracted to the inside of the pressure relief hole 11.

In the description of the present invention, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

In the present invention, unless otherwise explicitly specified or limited, for example, it may be fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. Lightning protection formula isolator, including base (1), its characterized in that: the both sides on base (1) top all are equipped with lightning protection insulator (2), two the top of lightning protection insulator (2) all is equipped with binding post (3), and one side on one of them binding post (3) top is rotated and is connected with plug-in strip (4), one side and the stationary contact seat block on another binding post (3) top of plug-in strip (4) are connected, two the inside of lightning protection insulator (2) all is equipped with cavity (8), two passageway (9) have all been seted up to the inside bottom of lightning protection insulator (2), two passageway (9) communicate each other with cavity (8) that correspond respectively, two pressure release hole (11) communicate each other with passageway (9) that correspond respectively.

2. The lightning protection type disconnector according to claim 1, characterized in that: two equal sliding connection in inside of pressure release hole (11) has sealed piece (10), two one side of sealed piece (10) respectively with be located the inside of corresponding passageway (9), and sealed piece (10) are located the inside one end of passageway (9) and are the inclined plane.

3. The lightning protection type disconnector according to claim 2, characterized in that: and the top and the bottom of the outer wall of each of the two sealing blocks (10) are provided with pressure relief grooves (13).

4. The lightning protection type disconnector according to claim 2, characterized in that: the bottom of one side of each sealing block (10) is fixedly provided with a fixing plate (12), the middle of one side of each fixing plate (12) is fixedly provided with a spring (14), and one end of each spring (14) is fixedly connected with the side wall of the corresponding channel (9).

5. The lightning protection type disconnector according to claim 1, characterized in that: the mounting hole has all been seted up to the both sides on base (1) top, two the middle part of lightning protection insulator (2) bottom all is fixed and is equipped with double-screw bolt (5), two double-screw bolt (5) alternate with the mounting hole that corresponds respectively and be connected.

6. The lightning protection type disconnector according to claim 5, characterized in that: the outer walls of the two studs (5) are in threaded connection with locking nuts (6).

7. The lightning protection type disconnector according to claim 5, characterized in that: two notches (7) are formed in one side of the base (1), and the positions of the two notches (7) are respectively matched with the positions of the corresponding mounting holes.

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