JPH0710918U - Incombustible transformer - Google Patents

Abstract

(57) [Abstract] [Purpose] It is possible to set the vacuum injection amount of the non-combustible insulating liquid, detect leakage of the non-combustible insulating liquid filled part and intrusion of insulating gas into the liquid side, and indicate the displacement amount of the pressure response device and Providing incombustible transformers that can be automatically monitored. [Structure] A pressure response cell 10 and a spacer 11 in which a thin metal plate is press-formed and then welded inside a pressure equalizer tank 14.
Alternately arranged, the pressure responsive cells 10 are accommodated in parallel by the collecting pipe 12 to accommodate the pressure responsive portion 13, and the displacement detector 18 is disposed on the surface of the outermost pressure responsive cell 10.
The output of the displacement detector 18 is displayed on a displacement indicator 19 installed outside the pressure equalizer tank 14. Further, a non-combustion detector in which a pressure equalizing device is configured to send a signal from the displacement detector 18 to another instruction device and a monitoring device (not shown).

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a non-combustible transformer in which an insulating liquid and an insulating gas are separately sealed, and in particular, it is equipped with a pressure response device that absorbs the liquid volume expansion due to the temperature rise of the non-combustible insulating liquid and prevents the pressure increase in the liquid filled part. Incombustible transformer.

[0002]

[Prior art]

 2 is a vertical cross-sectional view showing the structure of a conventional non-combustible transformer, and FIG. 3 is a vertical cross-sectional view showing the structure of a pressure equalizer of a conventional non-combustible transformer. The conventional non-combustible transformer shown in FIGS. The winding part 2 wound around the iron core 1 is housed in the insulating container 4 together with the non-combustible insulating liquid 3, and the cooler 6 installed outside the transformer tank 5 and the insulating container 4 are connected to the cooling pipes 7 and 8. The transformer tank 5 is filled with an insulating gas 9 for ground insulation. Then, the pressure-responsive cells 10 and spacers 11 formed by welding a thin metal plate after press-molding are alternately arranged, and the pressure-responsive cells 10 are connected in parallel by a collecting pipe 12. A pressure-responsive device 13 is installed inside a pressure equalizer tank 14. , The collecting pipe 12 is communicated with the cooling pipe 7 through the liquid-conducting side connecting pipe seat 15, and the gap of the pressure equalizer tank 14 is connected through the gas-conducting side connecting pipe seat 16 to the transformer tank. 5 to prevent the pressure increase of the liquid filled part due to the volume expansion of the incombustible insulating liquid 3 due to the change of the liquid temperature, the incombustible insulating liquid 3 inside the insulating container 4 and the insulating gas 9 inside the transformer tank 5. A pressure equalizing device 17 for equalizing the pressures of and is attached to the outside of the transformer tank 4.

[0003]

[Problems to be solved by the device]

 However, since the pressure response device is housed inside the pressure equalizer tank, the movement of the pressure response cell portion that responds to the volume change of the non-combustible insulating liquid cannot be seen from the outside. The liquid leakage can be determined by comparing the liquid temperature of the non-flammable insulating liquid with the response amount obtained from the liquid amount, but it cannot be determined because expansion / contraction of the pressure-responsive cell cannot be confirmed.

(2) The nonflammable insulating liquid is sealed by vacuum-injecting an amount of the nonflammable insulating liquid according to the liquid temperature at the time of sealing into the insulating container, the cooler, the cooling pipe, and the pressure response device. The adjustment of the inflow of the water must be measured only by the flowmeter.

(3) When the insulating gas enters the non-combustible insulating liquid side, it is expected that the insulating gas will accumulate in the pressure response cell of the pressure response device installed at the highest position, and the insulation gas The volume hinders the securing of the required response amount, but this state cannot be detected from the relationship between the volume change of the pressure response device and the liquid temperature.

[0006] There was a problem such as.

The present invention has been made in view of the above points, and it is possible to set the vacuum injection amount of the noncombustible insulating liquid, and it is possible to detect the leakage of the noncombustible insulating liquid sealed portion and the intrusion of the insulating gas into the liquid side. , It is an object of the present invention to provide a non-combustible transformer capable of displaying the displacement amount of a pressure response device and automatically monitoring it.

[0008]

[Means for Solving the Problems]

 In the non-combustible transformer of the present invention, a displacement detector is provided on the surface of the outermost pressure response cell of the pressure response device provided in the pressure equalizer, and the output thereof is disposed outside the pressure equalizer tank. It is equipped with a pressure responsive device configured to display on a displacement indicator and to be automatically monitored by transmitting it as a signal of a transformer operation monitoring device.

[0009]

[Action]

 According to the above configuration, the response amount is obtained from the displacement amount by measuring the relationship between the volume change of the pressure response cell and the displacement at the measurement position of the displacement detector before it is sealed and housed in the transformer tank. be able to. Also, by displaying the output of the displacement detector with a displacement indicator installed outside the pressure equalizer tank, the amount of response can be constantly monitored, and by monitoring the amount of response, the noncombustible insulating liquid is vacuum-injected. You can set the amount of injection. Furthermore, it is possible to detect leakage of the incombustible insulating liquid enclosure and intrusion of insulating gas into the liquid side, and display and automatically monitor the displacement of the pressure response device.

[0010]

【Example】

 Hereinafter, a pressure equalizer for a non-combustible transformer according to the present invention will be described with reference to an embodiment shown in the drawings. Regarding the structure of the non-combustible transformer and the structure of the portion that responds to the pressure of the pressure responsive device, the structure of the conventional non-combustible transformer and the pressure of the pressure responsive device described with reference to FIGS. Since the structure is the same as that of the part, description thereof will be omitted.

FIG. 1 is a longitudinal sectional view showing the structure of an embodiment of a pressure equalizing device for a non-combustible transformer according to the present invention. In FIG. 1, a thin metal plate is press-formed and welded inside a pressure equalizing device tank 14. A pressure response device 13 in which the pressure response cells 10 and the spacers 11 are alternately arranged and the pressure response cells 10 are connected in parallel by a collecting pipe 12 is housed, and displacement detection is performed on the surface of the outermost pressure response cell 10. A device (type capable of electric output such as strain gauge type or differential transformer type) 18 is set, and this output is displayed on a displacement indicator 19 installed outside the pressure equalizer tank 14. Further, a signal is sent from the displacement detector 18 to another indicating device and a monitoring device (not shown).

[0012]

[Effect of device]

 As described above, the pressure-equalizing device for a non-combustible transformer of the present invention uses the displacement detector disposed on the surface of the outermost pressure-responsive cell of the pressure-responsive device to measure the displacement of the pressure-responsive cell surface. The displacement indicator installed on the outside of the tank indicates it, and it is also configured to be automatically monitored by transmitting it as a signal of the transformer operation monitoring device. By measuring the relationship between the volume change of the response cell and the displacement at the measurement position of the displacement detector, the response amount can be obtained from the displacement amount.

(2) By displaying the output of the displacement detector by a displacement indicator attached outside the pressure equalizer tank, the amount of response can be constantly monitored.

(3) By monitoring the response amount, (a) the injection amount when the non-combustible insulating liquid is vacuum-injected can be set.

(B) When a leak occurs in the non-combustible insulating liquid enclosure, it can be detected as an abnormality in the liquid temperature-response amount.

(C) When the insulating gas enters the liquid side and accumulates in the reaction cell, it can be detected as an abnormality of liquid temperature-response amount.

(4) Not only can the displacement amount of the pressure response device be displayed, but it can also be loaded into the operation monitoring panel and automatically monitored.

Excellent effects such as

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a pressure equalizing device for a nonflammable transformer according to the present invention.

FIG. 2 is a vertical cross-sectional view showing the structure of a conventional nonflammable transformer.

FIG. 3 is a vertical cross-sectional view showing the structure of a conventional pressure equalizing device for an incombustible transformer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Pressure response cell 11 ... Spacer 12 ... Collecting pipe 13 ... Pressure response device 14 ... Pressure equalizer tank 17 ... Pressure equalizer 18 ... Displacement detector 19 ... Displacement indicator

Claims (1)

[Scope of utility model registration request] 1. An insulating container is provided in a transformer tank, and a winding part wound around an iron core is housed in the insulating container together with a non-combustible insulating liquid, and a cooler installed outside the transformer tank and the insulation. The non-combustible insulating liquid is circulated by communicating with a container via a cooling pipe to cool the winding portion, and an insulating gas for ground insulation is sealed in the transformer tank, and a pressure-responsive cell and a spacer are provided. A pressure response device in which the pressure response cells are alternately arranged and communicated in parallel by a collection pipe is housed in a pressure equalizer tank, and the collection pipe is communicated with the cooling pipe through a liquid-conducting side communication pipe seat, and In a non-combustible transformer in which the gap of the pressure equalizer tank communicates with the transformer tank via the gas-side communication pipe seat, a displacement detector is provided on the surface of the outermost pressure response cell of the pressure response device. , By the displacement detector,
The pressure-responsive cell is constructed so that the displacement amount on the surface of the pressure-responsive cell is displayed on a displacement indicator provided outside the pressure equalizer tank and is automatically monitored by transmitting it as a signal from a transformer operation monitoring device. A nonflammable transformer characterized by having a device.