CN201156500Y - Large-current high speed switch - Google Patents

Abstract

The utility model relates to a heavy current high-speed switch. A burst groove (3) of explosive (2) is arranged on a diversion bar (1); a burst groove support plate (4) shields the burst groove (3) and is stacked with the diversion bar (1); the back of the burst groove (3) is provided with a fracture groove (7); a fracture groove support plate (8) and the burst groove support plate (4) are oppositely insulated and stacked with the diversion bar (1) on the outside of the fracture groove (7); an electric detonator (5) is connected between an action command interface (6) and the explosive (2). The components except the action command interface (6) are sealed in a cylinder body (9). When an action command appears in the action command interface (6), the electric detonator ignites and detonates the explosive; the diversion bar is exploded in the burst groove and forms an air gap to isolate the fracture, thus interrupting the current path.

Description

A kind of big electric current speed-sensitive switch

Technical field

The utility model relates to a kind of big electric current speed-sensitive switch, is mainly used in to send out the path that the electric power system high speed is cut-off short circuit current.

Background technology

When the current supply circuit of power plant and transformer station is short-circuited fault, in the loop, flow through the 50Hz power frequency short circuit current of high amplitude, along with the growth of power system capacity, short-circuit current value increases year by year.The time that conventional primary cut-out cut-offs short circuit current is about 3～5 cycles (60～100ms), and generator and Transformer Winding Chang Yin are unable to bear the electric power of first cycle short circuit current and impact and deform and damage.Therefore, on-the-spot urgent need is cut-off the big faster electric current speed-sensitive switch of speed.

Patent name is that " rapid large-current spacer assembly ", the patent No. are 200420041539.3 Chinese patent, system makes the energy with explosive, when explosive charge, be stacked in water conservancy diversion on the insulation board and come its weakness and blown, form isolation fracture, reach the purpose of fast shut-off current channel.The main weak point of this method is: (1) water conservancy diversion row's isolation fracture is stacked on the insulation board, and the dielectric strength of isolation fracture and withstand voltage are determined along the face dielectric strength by insulation board.Blast dust and metal ion splash and be deposited on the insulation board surface are arranged during because of explosive charge, make insulation board lose the insulation property of expection, cause the dielectric strength of isolation fracture significantly to descend, so be difficult to satisfy the requirement of the relevant fracture withstand voltage of national standard.(2) for reaching the requirement of fracture withstand voltage, the length and the fracture quantity of fracture be must increase, thereby volume, weight and the cost of product strengthened.(3) be increased to after 4～5 when fracture quantity, because of the fracture voltage skewness causes the fracture withstand voltage not with the increase linear growth of fracture quantity, so be difficult to design the more product of voltage levels with this method.

Summary of the invention

The technical problems to be solved in the utility model is to overcome the deficiency described in the background technology, a kind of excellent performance is provided, is easy to the big electric current speed-sensitive switch to the development of voltage levels more.

The technical solution of the utility model is: be provided with the explosion groove of placing explosive on water conservancy diversion row, explosion groove supporting bracket hides the explosion groove, and explosion groove supporting bracket and water conservancy diversion row closed assembly are fastenedly connected, and electric cap is connected between action command interface and the explosive; The back side of explosion groove is provided with the fracture groove on water conservancy diversion row, and fracture groove supporting bracket is relative with explosion groove supporting bracket to be separated and arrange closed assembly at the outside of fracture groove and water conservancy diversion and be fastenedly connected;

Water conservancy diversion row, explosive, explosion groove, explosion groove supporting bracket, fracture groove, fracture groove supporting bracket all are closed within the cylindrical shell, and the action command interface is located at outside the cylindrical shell.By the action command of action command interface, from outside measure and control device, for example: be in earthy pulse transformer or optical fiber triggering system, or arrange the measurement control appliance that is in same potential with water conservancy diversion to the electric cap transmission.

Compared with prior art; the good effect that the utility model produced is: (1) is owing to designed the explosion groove on water conservancy diversion row; and in the explosion groove, be placed with explosive; explosion groove supporting bracket hides the explosion groove and water conservancy diversion row closed assembly is an one; when electric cap triggers explosive; weakness between weakness between explosion groove and the fracture groove or explosion groove and the water conservancy diversion row plane is blown up; and to fracture groove supporting bracket one rollover volume; form the air gap isolation fracture; thereby current path is disconnected at a high speed; faster one more than the order of magnitude than conventional circuit breaker, played protective effect better.(2) because fracture groove supporting bracket and relative separating of explosion groove supporting bracket, formed isolation fracture is the air gap fracture, thereby eliminated described in the technical background because of the insulation board surface insulation performance a series of problems such as causing the reduction of isolation fracture withstand voltage that descend, the electric property of this speed-sensitive switch is greatly improved, except that withstand voltage satisfies request of national standard, also can reduce volume, weight and the cost of device, and improve reliability of operation.(3) for being used for more voltage levels, on water conservancy diversion row, can distinguish at interval and design several explosion grooves and fracture groove, and the corresponding supporting bracket of closed assembly, the explosive in the explosion groove is linked to each other by explosive rope, explode simultaneously after receiving action command, constitute single cap sensitive formula multi-break structure.Owing to improved the fracture withstand voltage, so need not adopt too much fracture, the problem of linear growth is not easy to design the more product of voltage levels with the increase of fracture quantity thereby avoided the fracture withstand voltage; Connect an electric cap respectively can also for the explosive in each explosion groove, each electric cap is connected respectively on each self-corresponding action command interface, form many cap sensitives formula multi-break structure.

Description of drawings

Fig. 1: first example structure schematic diagram of the present utility model.

Fig. 2: second example structure schematic diagram of the present utility model.

Fig. 3: the 3rd example structure schematic diagram of the present utility model.

Fig. 4: the 4th example structure schematic diagram of the present utility model.

Fig. 5: the 5th example structure schematic diagram of the present utility model.

Embodiment

Fig. 1 represents first embodiment of the present utility model, is mainly on water conservancy diversion row 1 and is provided with the explosion groove 3 of placing explosive 2, and explosion groove supporting bracket 4 hides explosion groove 3 and arranges 1 closed assembly with water conservancy diversion, connects fastening by bolt 10.Explosive 2 is connected with action command interface 6 by electric cap 5 and holding wire, also can connect an explosive rope again between electric cap 5 and explosive 2.The back side of explosion groove 3 also is provided with fracture groove 7 on water conservancy diversion row 1, and fracture groove supporting bracket 8 and explosion groove supporting bracket 4 be relative to be separated and arrange 1 closed assembly at the outside and the water conservancy diversion of fracture groove 7, fastening by bolt 11 connections.

Water conservancy diversion row 1, explosive 2, explosion groove 3, explosion groove supporting bracket 4, fracture groove 7, fracture groove supporting bracket 8, fastening bolt 10, fastening bolt 11 are enclosed within the cylindrical shell 9 by end cap 12, action command interface 6 is located at outside the cylindrical shell 9, joins by holding wire and electric cap 5.

Fig. 2 represents the structural representation of second embodiment of the present utility model.But water conservancy diversion that explosion groove 3 be oppositely arranged identical at two block structures arranged between 1, closed assembly explosion groove supporting bracket 4 and fracture groove supporting bracket 8, and the explosives 2 in the explosion groove 3 link to each other by explosive rope 15.This structural design can make the rated current of this device expand and is twice, and constitutes the two water conservancy diversion row of single cap sensitive formula single break structure, the operating principle and the course of work and shown in Figure 1 identical.

Fig. 3 represents the structural representation of the 3rd embodiment of the present utility model.For being used for more voltage levels, on water conservancy diversion row 1, design two (or a plurality of) explosion grooves 3 and fracture groove 7 respectively at interval, except that its left and right sides difference closed assembly explosion groove supporting bracket 4 and fracture groove supporting bracket 8, the left end of closed assembly common support plate 13, this common support plate 13 and explosion groove supporting bracket 4 separate relatively in the middle, right-hand member hides explosion groove 3 and with 8 relative separating of fracture groove supporting bracket, positioning supporting part 14 is set in addition.Explosives 2 in each explosion groove 3 link to each other by explosive rope 15, receive blast simultaneously behind the action command, constitute the single water conservancy diversion row of single cap sensitive formula double break mouth (or multi-break) structure, the operating principle and the course of work and shown in Figure 1 identical.

Fig. 4 represents the structural representation of the 4th embodiment of the present utility model.System will be shown in Figure 3 the single water conservancy diversion row of single cap sensitive formula multi-break structural extended be the two water conservancy diversion row of single cap sensitive formula multi-break structure, be applicable to high voltage, the device of electric current greatly, the operating principle and the course of work and shown in Figure 1 identical.

Fig. 5 represents the structural representation of the 5th embodiment of the present utility model.Link to each other without explosive rope with the explosive 2 in the difference of structure shown in Figure 2 is explosion groove 3, and give the corresponding respectively connection of explosive 2 in each explosion groove 3 electric cap 5, each electric cap is connected respectively on each self-corresponding action command interface 6, forms the single water conservancy diversion row of many cap sensitives formula multi-break structure.This mode is applicable to two water conservancy diversion row frame modes of Fig. 4 too, constitutes the two water conservancy diversion row of many cap sensitives formula multi-break structure.Its operating principle and the course of work and shown in Figure 1 identical.

Said explosive 2 is prefabricated profiled bar shaped explosive or explosive rope or flexible linear shaped charge; Said cylindrical shell 9 is the insulating material tube; Said explosion groove supporting bracket 4, fracture groove supporting bracket 8 and common support plate 13 are insulation board or metallic plate; Said positioning supporting part 14 is insulating material or metal material.

With Fig. 1 is that example illustrates that the course of action of this device is as follows: during operate as normal, this device is connected in the current supply circuit, becomes current paths.When action command occurring on the action command interface 6, this action command just is transferred to electric cap 5 and makes it igniting.Said action command is from the outside measure and control device of otherwise designed, for example: be in earthy pulse transformer or optical fiber triggering system, or arrange the measurement control appliance that is in same potential with water conservancy diversion.The action of electric cap 5 causes explosive 2 blasts in the explosion groove 3, under the high temperature and hyperbar effect of explosion time, weakness between explosion groove 3 on the metal water conservancy diversion row 1 and the weakness between the fracture groove 7 or explosion groove 3 and the water conservancy diversion row plane is blown up and is rolled onto the final position 16 shown in the dotted line to 8 one rollovers of fracture groove supporting bracket, form the air gap isolation fracture, thereby current path is disconnected at a high speed.Receive action command moves to final position 16 to fracture time interval less than 250 μ s from electric cap 5,, played protective effect better than fast about 240 times of the circuit breaker of routine.Again because explosion groove supporting bracket 4 and 8 relative separating of fracture groove supporting bracket, formed isolation fracture is the air gap fracture, thereby eliminated described in the background technology because of the insulation board surface insulation performance a series of problems such as causing the reduction of isolation fracture withstand voltage that descend, the electric property of this speed-sensitive switch is greatly improved.

Structure shown in Figure 3 is compared with Fig. 1, difference is the double break mouth structure: when action command occurring on the action command interface 6, this action command is transferred to electric cap 5 and makes it igniting, and cause that explosives 2 explode simultaneously in explosives 2 in the left explosion groove 3, explosive rope 15 and the right explosion groove 3, form double break mouth tandem tap, make it to be applicable to higher electric pressure.Other course of action and shown in Figure 1 identical.

Structure shown in Figure 5 is compared with Fig. 1, and difference is many cap sensitives structure: when each action command interface 6 during simultaneously to corresponding with it electric cap 5 output ignition signals, each electric cap 5 is ignited simultaneously, and causes explosives 2 blasts in each explosion groove 3.Other course of action and shown in Figure 1 identical.

Claims (2)

1. one kind big electric current speed-sensitive switch, it is characterized in that: on water conservancy diversion row (1), be provided with the explosion groove (3) of placing explosive (2), explosion groove supporting bracket (4) hides explosion groove (3), explosion groove supporting bracket (4) is fastenedly connected with water conservancy diversion row (1) closed assembly, and electric cap (5) is connected between action command interface (6) and the explosive (2); The back side of going up explosion groove (3) described water conservancy diversion row (1) is provided with fracture groove (7), and fracture groove supporting bracket (8) is relative with explosion groove supporting bracket (4) to be separated and arrange (1) closed assembly at the outside of fracture groove (7) and water conservancy diversion and be fastenedly connected.

2. big electric current speed-sensitive switch according to claim 1, it is characterized in that: described water conservancy diversion row (1), explosive (2), explosion groove (3), explosion groove supporting bracket (4), fracture groove (7), fracture groove supporting bracket (8) all are enclosed within the cylindrical shell (9), and action command interface (6) is located at outside the cylindrical shell (9).

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