JP2013041773A - Switch - Google Patents

Abstract

The present invention provides a switch that can be manufactured by a simple method and has a predetermined breaking performance.
A first fixed terminal in which a through hole is formed and a second fixed hole that is disposed opposite to the first fixed terminal and that is disposed coaxially with the through hole. An insulating mold body in which a fixed terminal, the first fixed terminal, and the second fixed terminal are integrally molded, and an insertion hole that communicates the through hole and the accommodation hole is formed, and the first A movable conductor that is slidably inserted into the through-hole of the fixed terminal and that has an end portion that passes through the insertion hole of the insulating mold body and is slidably received in the receiving hole of the second fixed terminal. And a gas compartment formed between the insulating mold body, the movable conductor, and the fixed terminal and filled with gas.
[Selection] Figure 1

Description

  The present invention relates to a switch used, for example, in the air or in a pressurized tank.

In the conventional switch, the insulation and insulation performance was achieved using SF6 gas with high insulation and insulation performance. However, since SF6 gas is designated as one of the greenhouse gases, the development of switches that do not use SF6 gas has been underway in recent years. When gas such as dry air, nitrogen, carbon dioxide is used instead of SF6 gas, the cutoff performance and insulation performance of those gases is much lower than that of SF6 gas. Since the dimensions required for insulation and blocking are larger than those using the device, there is a disadvantage that the device becomes larger.

  Further, it is generally known that when the gas pressure is increased, both the insulation performance and the shut-off performance are improved. However, when the pressure is increased, the thickness of the tank in which the device is mounted increases, which causes an increase in cost.

  In Patent Document 1, by installing a terminal of a switch surrounded by an epoxy mold in a tank filled with nitrogen gas, and filling the space surrounded by the epoxy mold and the terminal with insulating oil, by the performance of the insulating oil, Achieves breaker performance and insulation performance of the switch.

  On the other hand, in Patent Document 2, a double pressure structure is provided by installing pressure vessels having different sealing pressures in the pressure vessel, and the insulation performance in the pressure vessel is improved by increasing the sealing pressure of the internal pressure vessel. Yes.

JP 2003-45301 A JP 2006-76721 A

The above-described conventional switch disclosed in Patent Document 1 can exhibit high insulation performance and breaking performance with insulating oil, but there is a concern about leakage of insulating oil. On the other hand, the conventional switch disclosed in Patent Document 2 can exhibit high insulation performance and shut-off performance in a pressure vessel with high pressure, but it is necessary to fill two pressure vessels with different pressures. There has been a problem that it becomes difficult.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a switch that can be manufactured by a simple method and has a predetermined breaking performance.

The switch according to the present invention includes a first fixed terminal having a through-hole formed therein, and a receiving hole that is disposed opposite to the first fixed terminal and is disposed coaxially with the through-hole. A second fixed terminal, the first fixed terminal, and the second fixed terminal are integrally molded, and an insulating mold body in which an insertion hole that connects the through hole and the accommodation hole is formed; The first fixed terminal is slidably inserted into the through hole, and an end portion is inserted through the insertion hole of the insulating mold body and is slidably received in the receiving hole of the second fixed terminal. And a gas compartment formed between the movable mold and the fixed terminal and filled with gas.

  Further, the switch according to the present invention has a first fixed terminal having a through hole formed therein, and a receiving hole that is arranged opposite to the first fixed terminal and is arranged coaxially with the through hole. An insulating mold in which the formed second fixed terminal, the first fixed terminal, and the second fixed terminal are integrally molded, and an insertion hole that connects the through hole and the accommodation hole is formed. Slidably inserted into the body and the through hole of the first fixed terminal, and the end portion is inserted through the insertion hole of the insulating mold body and slidable into the receiving hole of the second fixed terminal. A movable conductor housed in a gas compartment, a gas compartment formed between the insulating mold body and the movable conductor and the fixed terminal, in which a gas is sealed, and a tank in which the insulating mold body is housed and the gas is sealed. It is provided.

  According to the switch in the present invention, it is possible to obtain a switch that can be manufactured by a simple method and has a predetermined breaking performance.

It is sectional drawing which shows the cut state in the switch concerning Embodiment 1 of this invention. It is sectional drawing which shows the ON state in the switch concerning Embodiment 1 of this invention. It is sectional drawing which shows the cut state in the switch concerning Embodiment 2 of this invention. It is sectional drawing which shows the ON state in the switch concerning Embodiment 2 of this invention.

Embodiment 1 FIG.
Hereinafter, Embodiment 1 of the present invention will be described with reference to FIG. 1 and FIG. 2, and in each of the drawings, the same or equivalent members and parts will be described with the same reference numerals. 1 is a cross-sectional view showing a cut-off state in a switch according to Embodiment 1 of the present invention. FIG. 2 is a sectional view showing an on state in the switch according to Embodiment 1 of the present invention.

  In each of these drawings, 1 is a first fixed terminal in which a through hole 1a is formed, 2 is disposed opposite to the first fixed terminal 1, and an accommodation hole 2a disposed coaxially with the through hole 1a is provided. The formed second fixed terminal 3 is formed by integrally molding the first fixed terminal 1 and the second fixed terminal 2, and an insertion hole 3 a that connects the through hole 1 a and the accommodation hole 2 a is formed. For example, the insulating mold body 4 made of epoxy resin is slidably inserted into the through hole 1a of the first fixed terminal 1, the end portion 4a is inserted through the insertion hole 3a of the insulating mold body 3, and the second fixed terminal. The movable conductor 5 slidably accommodated in the second accommodation hole 2 a is formed between the insulating mold body 3 and the movable conductor 4, the first fixed terminal 1, and the second fixed terminal 2, and includes dry air, nitrogen, A gas compartment in which a gas such as carbon dioxide is enclosed.

Reference numeral 6 denotes a sliding contact provided on the first fixed terminal 1, and reference numeral 7 denotes a sliding contact provided on the second fixed terminal 2. Reference numeral 8 denotes an airtight seal body such as an O-ring or a T-ring disposed in the first fixed terminal 1 so that the gas in the gas compartment 5 does not leak outside. 9 is a triple junction formed by the insulating mold body 3 made of epoxy resin, the second fixed terminal 2 and the gas section 5, and because it is inside the second fixed terminal 2, the electric field is not concentrated,
This is advantageous for insulation.

  Next, the operation will be described. The operation from the switch-off state shown in FIG. 1 to the switch-on state shown in FIG. 2 is performed by passing the movable conductor 4 through the insertion hole 3a of the insulating mold body 3 toward the second fixed terminal 2 side. The end portion 4a of the second fixed terminal 2 is accommodated in the accommodating hole 2a of the second fixed terminal 2 through the triple junction 9.

  Thus, since the movable conductor 4 is accommodated in the accommodation hole 2a of the second fixed terminal 2 via the triple junction 9, the space in the gas compartment 5 is reduced, so that the gas in the gas compartment 5 is compressed and the pressure is increased. Get higher. That is, the pressure in the gas compartment 5 is higher than the pressure outside the insulating mold body 3 when the switch is turned on. Accordingly, by setting the high pressure only between the movable conductor 4 and the first fixed terminal 1 and the second fixed terminal 2 that require functions of interruption and insulation in the switch, the interruption and insulation performance can be improved. it can.

  The first fixed terminal 1 and the second fixed terminal 2 are energized using the sliding contacts 6 and 7 and the movable conductor 4. Moreover, it becomes possible to isolate | separate between the external space by the insulated mold body 3 between the movable conductor 4 which interrupts | blocks an electric current, the 1st fixed terminal 1, and the 2nd fixed terminal 2 in a switch.

  Further, the pressure of the gas compressed in the gas compartment 5 can be stored as pressure energy, and the pressure energy can be used as opening energy to increase the opening speed, thereby improving the blocking performance. it can. Also, it can be used as kinetic energy for driving the movable conductor 4.

As described above, a switch having a predetermined breaking performance can be obtained by using a simple method using gas such as dry air, nitrogen, carbon dioxide, etc. without using SF6 gas.

Embodiment 2. FIG.
A second embodiment of the present invention will be described with reference to FIGS. 3 and 4. In each figure, the same or equivalent members and parts will be described with the same reference numerals. FIG. 3 is a sectional view showing a cut state in the switch according to Embodiment 2 of the present invention. 4 is a cross-sectional view showing an on state in a switch according to Embodiment 2 of the present invention.

  In these drawings, 1 to 9 have the same configuration as that of the first embodiment described above. Reference numeral 10 denotes a tank in which the insulating mold body 3 is accommodated and a gas such as dry air, nitrogen, carbon dioxide, etc. enclosed in the gas compartment 5 is enclosed.

  Reference numeral 11 denotes a gas sealing hole provided in the second fixed terminal 2 so as to communicate with the receiving hole 21a, and reference numeral 12 denotes a gas sealing provided in the insulating mold body 3 so as to communicate with the gas sealing hole 11 and the inside of the tank 10. It is a hole.

  Reference numeral 13 denotes a gas pipe that fills the gas in the tank 10, and reference numeral 14 denotes a gas pipe branched from the gas pipe 13 and connected to the gas filling hole 12. Reference numeral 15 denotes a valve provided in the gas pipe 14. Reference numeral 16 denotes a gas supply unit that supplies gas to the gas pipe 13 and the gas pipe 14, and is provided with a pressure gauge (not shown). The gas supply into the gas compartment 5 formed between the insulating mold body 3, the movable conductor 4, the first fixed terminal 1, and the second fixed terminal 2 is performed through a gas pipe 14, The gas is supplied through the gas sealing hole 11.

Next, the operation will be described. At the time of assembly, the switch is turned off as shown in FIG. 3 and the valve 15 provided in the gas pipe 14 is opened so that dry air, nitrogen can be obtained using the pressure gauge and the gas supply unit 16. When the gas such as carbon dioxide is filled into the tank 10 through the gas pipe 13, the gas is also passed through the gas pipe hole 14 and the gas hole 11 into the gas compartment 5 in the insulating mold body 3 through the gas pipe 14. The pressure in the tank 10 and the gas compartment 5 is the same. In this way, by closing the valve 15 after one time of gas filling, two different gas compartments are formed, and a double pressure structure can be formed and the labor of gas filling can be simplified.

  The operation from the switch-off state shown in FIG. 3 to the switch-on state shown in FIG. 4 is performed by passing the movable conductor 4 through the insertion hole 3a of the insulating mold body 3 toward the second fixed terminal 2 side. The end portion 4a of the second fixed terminal 2 is accommodated in the accommodating hole 2a of the second fixed terminal 2 through the triple junction 9.

  Thus, since the movable conductor 4 is accommodated in the accommodation hole 2a of the second fixed terminal 2 via the triple junction 9, the space in the gas compartment 5 is reduced, so that the gas in the gas compartment 5 is compressed and the pressure is increased. Get higher. That is, the pressure in the gas compartment 5 is higher than the pressure outside the insulating mold body 3 when the switch is turned on. Accordingly, by setting the high pressure only between the movable conductor 4 and the first fixed terminal 1 and the second fixed terminal 2 that require functions of interruption and insulation in the switch, the interruption and insulation performance can be improved. it can.

  In addition, it becomes possible to isolate | separate between the external space by the insulated mold body 3 between the movable conductor 4 which interrupts | blocks an electric current, and the 1st fixed terminal 1 and the 2nd fixed terminal 2 in a switch. Moreover, the insulation mold body 3 is housed in the tank 10 and the pressure inside the tank 10 is increased from the atmospheric pressure, so that the insulation outside the insulation mold body 3 is further improved. Moreover, since it is in the tank 10, it is possible to prevent a decrease in insulation performance due to contamination outside the insulating mold body 3.

  In addition, the pressure of the gas compressed in the gas compartment 5 can be stored as pressure energy, and the pressure energy can be used as opening energy to increase the opening speed, thereby improving the blocking performance. it can. Also, it can be used as kinetic energy for driving the movable conductor 4.

As described above, a switch having a predetermined breaking performance can be obtained by using a simple method using gas such as dry air, nitrogen, carbon dioxide, etc. without using SF6 gas.
Furthermore, although the gas is sealed in the tank 10 once, a double pressure structure can be formed, and the pressure in the tank 10 may be low. Therefore, the thickness of the tank 10 can be reduced, and the cost can be reduced. It becomes possible.

  The present invention is suitable for realizing a switch that can be manufactured by a simple method and has a predetermined breaking performance.

DESCRIPTION OF SYMBOLS 1 1st fixed terminal 1a Through hole 2 2nd fixed terminal 2a Accommodating hole 3 Insulation mold body 3a Insertion hole 4 Movable terminal 4a End part 5 Gas section 10 Tank 15 Valve

Claims (6)

  A first fixed terminal in which a through hole is formed, a second fixed terminal that is disposed opposite to the first fixed terminal, and in which a receiving hole is formed coaxially with the through hole; The first fixed terminal and the second fixed terminal are integrally molded, an insulating mold body in which an insertion hole is formed to communicate the through hole and the accommodation hole, and the first fixed terminal A movable conductor that is slidably inserted into the through hole, an end of which is inserted into the insertion hole of the insulating mold body and is slidably received in the accommodation hole of the second fixed terminal; A switch comprising: a molded body, a gas compartment formed between the movable conductor and the fixed terminal and enclosing gas.   2. The switch according to claim 1, wherein the pressure in the gas compartment is higher than the pressure outside the insulating mold body when the movable conductor is operated and the switch is turned on.   The pressure in the gas compartment operates the movable conductor and puts a switch in an on state to store pressure energy in the gas compartment and use the pressure energy as opening energy. The switch according to claim 1 or 2.   A first fixed terminal in which a through hole is formed, a second fixed terminal that is disposed opposite to the first fixed terminal, and in which a receiving hole is formed coaxially with the through hole; The first fixed terminal and the second fixed terminal are integrally molded, an insulating mold body in which an insertion hole is formed to communicate the through hole and the accommodation hole, and the first fixed terminal A movable conductor that is slidably inserted into the through hole, an end of which is inserted into the insertion hole of the insulating mold body and is slidably received in the accommodation hole of the second fixed terminal; A switch comprising: a gas compartment formed between a mold body, the movable conductor, and the fixed terminal and enclosing gas; and a tank containing the insulating mold body and enclosing gas.   The pressure in the gas compartment in the insulating mold body is higher than the pressure in the tank when the movable conductor is operated and the switch is turned on to form a double pressure structure. Item 5. The switch according to item 4.   The insulating mold body is disposed in the tank, and when assembling, the gas compartment in the tank and the insulating mold body is the same, and after filling the gas in the tank, the valve connecting the tank and the insulating mold body is closed. The switch according to claim 4 or 5, wherein two gas sections are formed.

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