JPH0581688U - Gas measuring device for gas insulation equipment - Google Patents

Abstract

(57) [Summary] [Purpose] If the work of collecting and measuring insulating gas from a gas-insulated device in which electrical equipment is housed and filled with insulating gas is repeatedly repeated, the pressure in the housing will drop. Solve this problem. [Structure] A sampling chamber 2 formed by a cylinder 1 and pistons 11 and 12 is provided with a housing 24 via a pipe line 21 having a solenoid valve 3.
To communicate with the upper oil chamber 15 and the lower oil chamber 16 for driving the pistons 11 and 12 by a communication pipe 19 having a solenoid valve 6 and a pump 7, and an analysis chamber 9 having a gas sensor.
The collection chamber 2 and the collection chamber 2 are connected by a pipe 20 having a pump 8 to form a circulation flow path.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a gas measuring device for a gas insulation device, in which insulating gas is sampled and returned to the original position after measurement.

[0002]

[Prior Art]

 In order to reduce the insulation distance and reduce the size of the equipment, a gas-insulated device is provided to house electrical equipment by enclosing an insulating gas inside the housing. The gas-insulated device may locally overheat inside the housing, and in such a case, insulating gas is collected from the housing and analyzed.

In this case, conventionally, insulating gas is extracted from the housing, and the extracted insulating gas is analyzed using gas chromatography, ion chromatography, or the like.

[0004]

[Problems to be solved by the device]

 However, if the number of times the insulating gas is sampled and analyzed increases, the pressure of the insulating gas in the housing decreases, so that the insulating gas cannot be analyzed frequently. In addition, insulating gas cannot be analyzed under high pressure.

Therefore, an object of the present invention is to provide a gas measuring device for a gas insulation device that solves the above problems.

[0006]

[Means for Solving the Problems]

 The configuration of the present invention for achieving such an object is to provide a sampling chamber for sampling the insulating gas between the cylinder and the piston that slides in the cylinder and is self-contained so that the insulating gas in the gas-insulated device is filled. The inside of the housing is connected to the gas sampling chamber via an on-off valve, and the analysis chamber equipped with the gas sensor and the gas sampling chamber are connected by a pipe line with a pump to form a circulation flow path, and the piston is A driving means for driving is provided.

[0007]

[Action]

 After driving the piston so that the gas sampling chamber has a constant volume, open the on-off valve to collect the insulating gas into the gas sampling chamber, then close the on-off valve and drive the piston to increase the volume of the gas sampling chamber. This lowers the pressure of the insulating gas. After that, the pump is driven to circulate the insulating gas in the circulation channel, and the insulating gas is measured by the gas sensor in the analysis chamber. After that, the on-off valve is opened and the piston is driven to return the insulating gas in the gas sampling chamber into the housing.

[0008]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings.

FIG. 1 shows the configuration of a gas measuring device for a gas insulation device according to the present invention. As shown in the drawing, pistons 11 and 12 are provided inside a cylindrical cylinder 1, and a rod 13 connecting the pistons 11 and 12 penetrates a partition wall 14 in an airtight manner. As a result, the inside of the cylinder 1 is divided into a sampling chamber 2 for sampling the insulating gas, an upper oil chamber 15, a lower oil chamber 16 and an open chamber 17. The open chamber 17 is opened to the atmosphere via the open / close valve 18.

When the upper oil chamber 15 and the lower oil chamber 16 are filled with oil for driving the pistons 11 and 12, and a communication pipe 19 for connecting the upper oil chamber 15 and the lower oil chamber 16 is provided. A pump 7 and a solenoid valve 6 are provided on the communication pipe 19. In other words, by moving the oil with the pump 7, the pistons 11 and 12 are indirectly moved.

The collection chamber 2 is connected to the analysis chamber 9 by a pipe line 20 and constitutes a circulation flow path. A gas sensor for analyzing the insulating gas is housed in the analysis chamber 9. The pipe 20 is provided with a pump 8 for circulating an insulating gas in the circulation passage.

Further, the collection chamber 2 is communicated with the inside of the housing 24 of the gas-insulated equipment via the pipe line 21, and the flow path 21 is provided with the solenoid valve 3. Then, in order to prevent the pressure of the insulating gas in the housing 24 from affecting the gas sensor in the analysis chamber 9, the solenoid valves 4 and 5 are provided in the pipeline 20, and the pressure of the insulating gas in the pipeline 20 is set. A conservator 10 is provided to mitigate fluctuations. Reference numeral 22 is a normally closed manual open / close valve, and 23 is a normally open manual open / close valve.

Next, the operation of the gas measuring device of such a gas insulation device will be described. When the insulating gas is not measured, the solenoid valves 3, 4, 5 and 6 are closed, and the piston 11 is set to the uppermost end of the cylinder 1. Next, in preparation for collecting the insulating gas from the inside of the housing 24 of the gas insulation device, the solenoid valve 6 is opened and the pump 7 is operated to move the oil from the upper oil chamber 15 to the lower oil chamber 16. , Thereby lowering the piston 11 to an intermediate position in the vertical direction. As a result, the sampling chamber 2 in a vacuumed state is formed. After that, when the solenoid valve 3 is opened, the insulating gas moves from the inside of the housing 24 into the sampling chamber 2 through the pipe 21 due to the pressure difference, and the inside of the housing 24 and the inside of the sampling chamber 2 have the same pressure. Then, when the solenoid valve 3 is closed, the collection of the insulating gas is completed.

Next, in order to adjust the pressure of the insulating gas in the sampling chamber 2, the solenoid valve 6 is opened and the pump 7 is operated to further move the oil in the upper oil chamber 15 to the lower oil chamber 16, thereby Move the piston 11 to the lowest end. Since the volume of the sampling chamber 2 is increased by lowering the piston 11, the pressure of the insulating gas can be reduced to atmospheric pressure. This completes the pressure adjustment of the insulating gas in the sampling chamber 2.

Next, the solenoid valves 4, 5 are opened to send the insulating gas in the sampling chamber 2 to the analysis chamber 9, and the pump 8 is operated. Then, since the insulating gas circulates in the pipe 20, the gas sensor in the analysis chamber 9 measures the insulating gas, and the analysis result is obtained. When the analysis is completed, the pump 8 is stopped and the solenoid valves 4 and 5 are closed.

Next, the solenoid valve 3 is opened to return the analyzed insulating gas into the housing 24. Then, by opening the electromagnetic valve 6 and operating the pump 7, the oil in the lower oil chamber 16 is moved to the upper oil chamber 15. As a result, the piston 11 is moved from the lowermost end to the uppermost end, and the insulating gas in the sampling chamber 2 is returned into the housing 24 via the pipe line 21. After that, if the solenoid valve 3 is closed, the work of returning the insulating gas is completed, and the work of analyzing the insulating gas is completed.

The above-described operation of the solenoid valve or the like is achieved by performing a step operation by a computer or a sequencer.

[0018]

[Effect of the device]

 As can be seen from the above description, the gas measuring device for gas insulated equipment according to the present invention has a sampling chamber capable of communicating with the inside of the housing filled with the insulating gas in the gas insulated equipment and increasing or decreasing the volume. Since the circulation channel is formed by connecting the analysis chamber having the gas sensor and the sampling chamber, the insulating gas in the housing can be sampled and measured, and then returned to the housing again. Therefore, even if the insulating gas is frequently measured, the pressure of the insulating gas in the housing does not drop.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a gas measuring device for a gas insulation device according to the present invention.

[Explanation of symbols]

 1 ... Cylinder 2 ... Collection chamber 3, 4, 5, 6 ... Solenoid valve 7, 8 ... Pump 9 ... Analysis chamber 11, 12 ... Piston 15 ... Upper oil chamber 16 ... Lower oil chamber 19 ... Communication pipe 20, 21 ... Pipe Road 24 ... Enclosure

Claims (1)

[Scope of utility model registration request] 1. A sampling chamber for sampling an insulating gas is provided between a cylinder and a piston slidable in the cylinder, and the inside of the housing in which the insulating gas in the gas insulating device is sealed and the gas sampling chamber are provided. It is characterized in that it is connected through an on-off valve, the analysis chamber provided with a gas sensor and the gas sampling chamber are connected by a pipe line having a pump to form a circulation flow path, and drive means for driving a piston is provided. Gas measuring device for gas insulation equipment.