JP3334566B2 - Pressure thermometer for electrical equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a pressure thermometer of an electric device which is attached to an electric device such as a transformer and measures the pressure and temperature of the electric device.

[0002]

2. Description of the Related Art Conventionally, a pressure gauge and a thermometer of electric equipment are shown in FIG.
This will be described with reference to FIGS. As shown in FIG. 11, in order to measure the internal temperature and pressure of the electric device 31 in which gas or the like is sealed, a thermometer 32 and a pressure gauge 33 are separately attached to the electric device 31. As shown in FIG. 12, the thermometer 32 is a rod-shaped thermometer such as JIS-B-7412 “a glass rod-shaped thermometer” or a JIS-B-75 as shown in FIG.
There is a dial thermometer of 28 "mercury full pressure type indicating thermometer". In addition, as shown in FIG.
-B-7505 There is a dial type pressure gauge or compound gauge such as "Bourdon tube pressure gauge".

[0003] The operation of the pressure gauge and the thermometer of the electric apparatus configured as described above will be mainly described with reference to Figs. Now, a value is read from the thermometer 32 and the pressure gauge 33, and the nameplate 35 displaying the temperature-pressure characteristic curve of FIG.
It is checked whether or not the intersection of the read values is within the black portion 35a.
Is determined to be abnormal.

[0004]

Since the conventional pressure thermometer of the electric equipment is constructed by mounting two instruments of the thermometer 32 and the pressure gauge 33 as described above, a large mounting space is required. There was a problem. In addition, when checking whether the temperature value and the pressure value in the electric device 31 are normal, the operator reads the values of the thermometer 32 and the pressure gauge 33, and the relationship between the read temperature value and the pressure value is determined. It must be checked whether the value is in a normal value or not, and whether it is in the black portion 35a of the nameplate 35 on which the temperature-pressure characteristic curve of FIG. 15 is described. There was a problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and requires only a small space for mounting a thermometer and a pressure gauge, and checks whether the relationship between the temperature value and the pressure value is a normal value. It is an object of the present invention to provide a pressure thermometer of an electric device, which can easily confirm whether or not the pressure is no.

[0006]

According to a first aspect of the present invention, there is provided a pressure thermometer for an electric device, a rod-shaped thermometer for measuring a temperature value inside the electric device, and a pressure gauge for measuring a pressure value inside the electric device. And a case accommodating the bar thermometer and the pressure gauge, wherein the bar thermometer is erected and fixed in the case, and an upper portion of the bar thermometer is provided. Alternatively, a bellows of the pressure gauge is provided at a lower portion, one end of the bellows is fixed to a bar, and a reference portion for reading a pressure value is provided on the bar or a marker member fixed to the bar, and a pressure scale corresponding to the reference portion is provided. the installed in the case, in the above case, the scale portion of the rod-shaped thermometer, a window provided to the reference portion is visible, the pressure value of the pressure gauge
The indicating member that indicates the corresponding allowable temperature range
It is characterized by being connected to .

According to a second aspect of the present invention, there is provided a pressure thermometer for electric equipment, comprising: a rod-shaped thermometer for measuring a temperature value inside the electric equipment;
A pressure gauge that measures the pressure value inside electrical equipment
A case containing the thermometer and the pressure gauge.
A pressure thermometer for electric equipment, wherein a rod-shaped temperature
Vertically fix the thermometer, and place it on the top or bottom of this thermometer.
The bellows of the pressure gauge is provided, and one end of this bellows is
Fixed on the stick or the sign member fixed to the stick
Indicator indicating the allowable temperature range corresponding to the pressure value of the pressure gauge
Connected to the case, the liquid column of the rod thermometer
A window is provided so that the tip and the indicator
It is characterized by the following.

In a pressure thermometer for an electric device according to a third aspect of the present invention, a bellows of the pressure gauge is provided above the rod-shaped thermometer, and when the pressure in the electric device increases, the bellows contracts, When the pressure drops, the projection of the bellows is inserted into the case so that the bellows extends, and the end of the bellows is fixed to the case.

In a pressure thermometer for an electric device according to a fourth aspect of the present invention, a bellows of the pressure gauge is provided below the rod-shaped thermometer, and when the pressure in the electric device increases, the bellows contracts, The end of the bellows is fixed to the case so that the bellows extends when the pressure decreases.

In a pressure thermometer for electric equipment according to a fifth aspect of the present invention, a bellows of the pressure gauge is provided above the rod-shaped thermometer, and when the pressure in the electric equipment rises, the bellows expands, An opening of the bellows is fixed to the case so that the bellows contracts when the pressure decreases.

In a pressure thermometer for an electric device according to a sixth aspect of the present invention, a bellows of the pressure gauge is provided below the rod-shaped thermometer, and when the pressure in the electric device increases, the bellows expands, When the pressure decreases, the projection of the bellows is inserted into the case so that the bellows contracts, and the opening of the bellows is fixed to the case.

According to a seventh aspect of the present invention, there is provided a pressure thermometer for electric equipment, wherein the inside of the bellows is evacuated.

A pressure thermometer for an electric device according to an eighth aspect of the present invention is characterized in that a cap for hermetically covering the outside of the bellows and a space surrounded by the cap and the bellows are evacuated. Things.

According to a ninth aspect of the present invention, there is provided a pressure thermometer for an electric device, wherein a temperature-sensitive portion for detecting the temperature of the rod-shaped thermometer and an inner surface of the case have a better heat conductivity than a refrigerant inside the electric device. It is characterized by being filled with a substance.

A pressure thermometer for an electric device according to a tenth aspect of the present invention is characterized in that a temperature sensing part for detecting the temperature of the rod-shaped thermometer is brought into contact with the inner surface of the case.

According to an eleventh aspect of the present invention, there is provided a pressure thermometer for an electric device, wherein a temperature sensing part for detecting the temperature of the rod-shaped thermometer is soaked with a liquid.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 An embodiment of the present invention will be described with reference to FIG. FIG. 1 is a side sectional view showing a main part of a pressure thermometer of an electric device according to an embodiment of the present invention. In FIG. 1, a pressure thermometer 100 of an electric device includes a thermometer unit 30 that detects and displays a temperature of a refrigerant inside the electric device, and a pressure gauge unit 50 that detects and displays a pressure inside the electric device. Are housed in a cylindrical main body case 1, and the lower end of the main body case 1 is inserted into an electric device 31, and the main body case 1 is fixed to a mounting seat 22 provided on a top cover 31 a of the electric device 31. Have been.

The main body case 1 is provided with a long hole-shaped viewing window 2 outside the electric equipment 31, an opening 4 at the lower end so as to communicate with the inside of the electric equipment 31, and a transparent inside. Tube 3
Is installed.

The thermometer section 30 includes upper and lower parts 2 in the main body case 1.
Holes 10 and 11 are provided at the center of the holding plates 8 and 9 provided at the locations, and the rod-shaped thermometers 7 are erected and fixed in the holes 10 and 11 so that the scale appears in the viewing window 2.

The pressure gauge section 50 has an outer diameter smaller than the inner diameter of the main body case 1 and contracts when the internal pressure of the electric equipment 31 increases and expands when the internal pressure decreases. A protrusion (inside) 15a of the bellows 15 maintained at the same pressure as that of the bellows 15 is provided above the rod-shaped thermometer 7, and the upper end of the bellows 15 is hermetically sealed and fixed to the main body case 1. A hole 13 is provided at an eccentric position of the upper holding plate 8 and a cap 6 which is covered to prevent dust and the like from entering the inside of the device, and the hole 13 is vertically movable in parallel with the rod-shaped thermometer 7. The indicator rod 12 is inserted through the bellows 15, and one end of the indicator rod 12 is fixed to the tip end surface of the bellows 15. Air enters through the gap between the caps 6 and the like, and the inside of the protruding portion 15a of the bellows 15 is set to the atmospheric pressure.

The lower end of the indicator rod 12 is bent in an arc shape in the horizontal direction to form a marker (marker member) 16 as a reference portion. The marker 16 is loosely inserted into the bar-shaped thermometer 7, and the marker 16 is It is formed so as to be able to move up and down along a pressure scale 17 provided along the edge of the viewing window 2.

[0022] as an indicator member an auxiliary needle 21 is pressure gauge unit 5
It is connected to the mark 16 of 0 , and is configured to indicate the allowable temperature range by the scale of the bar-shaped thermometer 7 corresponding to the pressure value indicated by the mark 16.

The operation of the pressure thermometer 100 of the electric apparatus configured as described above will be described with reference to FIG. The temperature sensing part of the rod-shaped thermometer 7 in the gas of the electric device 31 detects the gas temperature, and based on this, the liquid column of the rod-shaped thermometer 7 moves to display the gas temperature.

On the other hand, when the gas pressure in the electric device 31 increases, the bellows 15 contracts, and when the gas pressure decreases, the bellows 15 expands, and the movement of the bellows 15 is linked. Then, the indicator rod 12 moves up and down, the marker 16 also moves up and down, and the gauge pressure at this time is displayed from the position of the marker 16 and the pressure scale 17.

The relationship between the gas temperature value and the gas pressure value can be known from whether or not the tip of the liquid column of the rod-shaped thermometer 7 is within the range of the arrow of the auxiliary needle 21 connected to the marker 16. If the scale of the thermometer is within the range of the auxiliary needle 21, it can be checked that the electric device 31 is in a normal state.

As shown in FIG. 2, the inside of the bellows 15 is evacuated by sealing the opening at the upper end of the bellows 15 with the sealing member 1a, so that the indication of the sign 16 indicates the absolute pressure. You may do it.

Embodiment 2 FIG. Another embodiment of the present invention will be described with reference to FIG. FIG. 3 is a side sectional view showing a main part of a temperature and pressure gauge of an electric device according to another embodiment of the present invention. In FIG. 3, FIG.
The same reference numerals denote the same or corresponding parts, and a description thereof will be omitted.

Pressure gauge section 1 of pressure thermometer 200 for electric equipment
Reference numeral 50 denotes an outer diameter smaller than the inner diameter of the main body case 1, and is maintained at the same pressure as that of the inside of the electric equipment 31 so as to expand when the internal pressure of the electric equipment 31 increases and to contract when the internal pressure decreases. An opening 19a of the bellows 19 is provided above the rod-shaped thermometer 7, and an opening 1 at the upper end of the main body case 1 is provided.
z, and air enters through a gap of the cap 6 covered on the outside of the bellows 19 and the outside of the bellows 19 is brought to the atmospheric pressure.

The operation of the pressure thermometer 200 of the electric apparatus configured as described above will be described with reference to FIG. The temperature sensing part of the thermometer 7 in the gas of the electric device 31 detects the gas temperature, and based on this, the liquid column of the rod-shaped thermometer 7 moves to display the gas temperature.

On the other hand, when the gas pressure in the electric device 31 rises, the bellows 19 expands, and when the gas pressure decreases, the bellows 19 contracts and moves in conjunction with the movement of the bellows 19. The indicator rod 12 moves up and down, and the marker 16 also moves up and down. The position of the marker 16 and the scale 17 indicate the gauge pressure at this time.

As shown in FIG. 3, the space between the bellows 19 and the cap 6 may be evacuated to improve the airtightness. In this case, the indicator 16 indicates the absolute pressure. Further, a space is formed by the outside of the bellows 19 and the cap 6, but instead of the cap 6, the main body case 1
Needless to say, the space may be formed by the above method.

Embodiment 3 FIG. Another embodiment of the present invention will be described with reference to FIG. FIG. 4 is a sectional side view showing a main part of a pressure thermometer in which a bellows according to another embodiment of the present invention is attached to a lower portion. In the drawing, the same reference numerals as those in FIG. Omitted. In FIG. 4, the thermometer section 300 is a main body case 1.
A hole 11 is provided at the center of the holding plate 9 provided at two places (one not shown) at the lower part of the rod, and the bar-shaped thermometer 7 is erected and fixed so that the scale appears from the viewing window 2 in the hole 11. I have.

The pressure gauge section 500 has a bellows 11 whose outer diameter is smaller than the inner diameter of the main body case 1 so that it contracts when the internal pressure of the electric device 31 increases and expands when the internal pressure decreases.
5 is fixed around the lower end of the main body case 1, and a hole 13 is provided at an eccentric position of the lower holding plate 9.
One end of the indicator rod 12 is fixed to the bottom of the bellows 115 by passing through the rod 3 so as to be movable up and down in parallel with the rod-shaped thermometer 7. Note that the operation of this embodiment is almost the same as that of the first embodiment, and a description thereof will be omitted.

Also, as shown in FIG. 5 corresponding to FIG. 3, the outer diameter is smaller than the inner diameter of the main body case 1, and it expands when the internal pressure of the electric device 31 increases, and when the internal pressure decreases. A base 119 is provided at the lower part of the rod-shaped thermometer 7 so as to contract, and an opening 119a is formed at an opening 1z at the lower end of the main body case 1.
It is fixed around. The operation of this embodiment is almost the same as that of the second embodiment, and the description is omitted.

Further, as shown in FIG. 6, the temperature-sensitive part of the rod-shaped thermometer 7 may be fixed by contacting the inner surface of the main body case 1, or as shown in FIG. Is provided at the lower portion of the inner surface of the main body case 1 and has a cylindrical heat transfer member 120 formed of a material having better heat conductivity than the refrigerant inside the electric device, for example, rubber to which cabon is added,
A cylindrical hole may be provided in the center of the heat transfer member 120, and the rod-shaped thermometer 7 may be erected and fixed by engaging the temperature-sensitive part of the rod-shaped thermometer 7 with this hole. In the configuration of the pressure thermometer in FIG. 5, the temperature-sensitive part of the rod-shaped thermometer 7 may be immersed in the liquid 121 having good heat conduction as shown in FIG.

In the case of the embodiment shown in FIGS. 6 to 8, the temperature sensing portion of the rod-shaped thermometer 7 is in contact with the heat transfer member 120, the liquid 121 having good heat conduction, and the inner surface of the main body case 1. Either configuration allows the temperature of the cooling gas or the like inside the electric device to be quickly transmitted to the temperature-sensitive portion of the rod-shaped thermometer 7.

Further, as shown in FIG. 9, a double bellows may be used. In FIG. 9, a donor-shaped hole 1 z is formed in the bottom surface of the main body case 1, and a sealing portion of a first bellows 23 disposed inside is fixed to a central portion,
An end of a second bellows 24 concentrically arranged outside the first bellows 23 is fixed to an end of the case 1, and an end of the first bellows 23 in the case 1 and a second The end of the second bellows 24 is joined by a flat plate 25. The tip of the rod-shaped thermometer 7 is inserted inside the first bellows 23. The pressure thermometer of the electric device configured as described above improves the accuracy of the measured value of the pressure.

Further, as shown in FIG.
Provided in the interior of the bellows 23 may be inserted distal end portion having a temperature sensing portion of the rod-shaped thermometer 7 in the cylinder 26.

Although the pressure scale 17 is read by providing the marker 16 in the above embodiment, a parallel line or the like as a reference is drawn on the indicator rod 12 and the pressure scale 17 is read using this as a reference portion. May be.

[0040]

According to the first and second aspects of the present invention , the temperature and the pressure inside the electric equipment can be known with one instrument, and only one instrument needs to be attached, so that the mounting process on the electric equipment side can be performed. There is an effect that it can be mounted in a narrow space with only one. In addition, the temperature value and pressure
There is no need to compare the force value with the temperature-pressure characteristic curve.
In addition, the nameplate of the temperature-pressure characteristic curve in the electrical equipment
There is an effect that it can be made unnecessary.

According to the third invention, the first invention and the second invention
In addition to the effects of the invention , the bellows shrinks even when the pressure inside the electric device rises, so that the bellows are hardly damaged, and the temperature sensing part of the rod-shaped thermometer is easily operated.

According to the fourth aspect , in addition to the effects of the first and second aspects, the bellows shrinks even when the pressure inside the electric device increases, so that the bellows is damaged. It has the effect of being difficult.

According to the fifth invention, the first invention and the second invention
In addition to the effects of the invention , the opening of the bellows is fixed to the case so that the bellows expands when the pressure in the electric device increases and the bellows contracts when the pressure decreases. There is an effect that the pressure value can be easily read by the marker member which moves as the bellows expands or contracts in response to the increase or decrease of the pressure in the electric device.

According to the sixth aspect , in addition to the effects of the first and second aspects, when the pressure in the electric device increases, the bellows expands and the pressure decreases. In this case, the projection of the bellows is inserted into the case so that the bellows contracts, and the opening of the bellows is fixed to the case. Thus, there is an effect that the pressure value can be easily read by the marker member which moves as the bellows expands or contracts.

According to the seventh aspect , in addition to the effect of the third aspect , since the inside of the bellows is evacuated, an absolute pressure can be indicated as a pressure value in the electric equipment.

According to the eighth aspect , in addition to the effect of the fifth aspect , since the space surrounded by the outside of the bellows and the cap is evacuated, an absolute pressure can be indicated as a pressure value in the electric equipment. effective.

According to the ninth invention, the fourth invention or the sixth invention
In addition to the effects of the invention of the present invention , since the temperature sensing part for detecting the temperature of the rod-shaped thermometer and the inner surface of the case are filled with a substance having a higher thermal conductivity than the refrigerant inside the electric device, the rod-shaped thermometer This has the effect that the temperature sensing part can quickly detect the temperature of the refrigerant of the electric equipment.

According to the tenth aspect , the fourth aspect or the fourth aspect
In addition to the effect of the sixth aspect, since the temperature sensing part for detecting the temperature of the rod-shaped thermometer is brought into contact with the inner surface of the case, the temperature sensing part of the rod-shaped thermometer can quickly detect the temperature of the refrigerant inside the electric equipment. This has the effect.

According to the eleventh aspect , in addition to the effects of the ninth aspect , the liquid is immersed in the temperature-sensitive part for detecting the temperature of the rod-shaped thermometer, so that the temperature-sensitive part of the rod-shaped thermometer quickly becomes an electric device. This has the effect that the temperature of the refrigerant can be detected.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a main part of a pressure thermometer of an electric device according to an embodiment of the present invention.

FIG. 2 is a side sectional view showing a main part of a pressure thermometer of an electric device according to another embodiment of the present invention.

FIG. 3 is a side sectional view showing a main part of a pressure thermometer of an electric device according to another embodiment of the present invention.

FIG. 4 is a side sectional view showing a main part of a pressure thermometer of an electric device according to another embodiment of the present invention.

FIG. 5 is a side sectional view showing a main part of a pressure thermometer of an electric device according to another embodiment of the present invention.

FIG. 6 is a side sectional view showing a main part of a pressure thermometer of an electric device according to another embodiment of the present invention.

FIG. 7 is a side sectional view showing a main part of a pressure thermometer of an electric device according to another embodiment of the present invention.

FIG. 8 is a side sectional view showing a main part of a pressure thermometer of an electric device according to another embodiment of the present invention.

FIG. 9 is a side sectional view showing a main part of a pressure thermometer of an electric apparatus using a double bellows according to another embodiment of the present invention.

FIG. 10 is a side sectional view showing a main part of a pressure thermometer of an electric device using a double bellows according to another embodiment of the present invention.

FIG. 11 is a front view in which a pressure thermometer of a conventional electric device is fixed.

FIG. 12 is an external view of a rod-shaped thermometer.

FIG. 13 is an external view of a conventional dial thermometer.

FIG. 14 is an external view of a conventional Bourdon tube pressure gauge.

FIG. 15 is a front view of a nameplate having a conventional temperature-pressure curve.

[Explanation of symbols]

1 body case, 2 viewing window, 11 holes, 7 rod thermometer, 12 indicator rod, 15, 19, 115, 119 bellows, 15a, 115a bellows projection, 16 marker member, 17 pressure scale, 19a, 119a Open part of bellows, 21 auxiliary needle (pointing member), 23 first bellows, 25 second bellows, 31 electrical equipment, 10
0,200 pressure thermometer, 121 liquid.

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G01L 7/06 G01K 5/32 G01K 5/00

Claims (11)

(57) [Claims] 1. A bar thermometer for measuring a temperature value inside an electric device, a pressure gauge for measuring a pressure value inside the electric device, and a case accommodating the bar thermometer and the pressure gauge. Pressure thermometer for electrical equipment,
A bar-shaped thermometer is erected and fixed in the space, and a bellows of the pressure gauge is provided above or below the bar-shaped thermometer, and one end of the bellows is fixed to the bar, and a sign member fixed to the bar or the bar is provided. A reference portion for reading a pressure value is provided, and a pressure scale corresponding to the reference portion is provided in the case.The case has a scale portion of the rod-shaped thermometer, and a window is provided so that the reference portion can be visually recognized . For the pressure value of the above pressure gauge
An indicating member indicating the permissible temperature range corresponding to
A pressure thermometer for electrical equipment, which is connected . 2. A bar for measuring a temperature value inside an electric device.
Thermometer and pressure gauge for measuring the pressure value inside electrical equipment
And a case containing the rod-shaped thermometer and the pressure gauge
And a pressure thermometer for electrical equipment comprising:
The rod thermometer is set up and fixed in the
Or, install the bellows of the above pressure gauge
One end of the rod is fixed to a rod, and this rod or a mark
The allowable temperature range corresponding to the pressure value of the pressure gauge
The indicating member shown is connected to the case,
So that the tip of the liquid column and the indicating member
Pressure thermometer for electrical equipment, characterized by having a window. 3. The bellows of the pressure gauge is provided above the rod-shaped thermometer, and the bellows contracts when the pressure in the electric equipment increases, and the bellows when the pressure decreases. - the tongue so's is extended - the protrusion of's is inserted into the case, the tongue - claims the end of's characterized by being fixed to the casing 1 or
2. A pressure thermometer for an electric device according to 2 . 4. The bellows of the pressure gauge is provided below the rod-shaped thermometer, and when the pressure in the electric equipment increases, the bellows contracts, and when the pressure decreases, the bellows decreases. - the tongue so's stretches - claims the end of's characterized by being fixed to the casing 1 or
2. A pressure thermometer for an electric device according to 2 . 5. The bellows of the pressure gauge is provided above the rod-shaped thermometer, and the bellows expands when the pressure in the electric device increases, and the bellows increases when the pressure decreases. - the tongue so's shrinks - the claim 1 an opening of's characterized by being fixed to the casing
Is a pressure thermometer of the electric device according to 2 . 6. The bellows of the pressure gauge is provided below the rod-shaped thermometer, and when the pressure in the electric equipment increases, the bellows expands, and when the pressure decreases, the bellows increases. - the tongue so's contracts - the protrusion of's is inserted into the case, the Vero - the claim 1 an opening of's characterized by being fixed to the casing
Is a pressure thermometer of the electric device according to 2 . 7. The pressure thermometer for an electric device according to claim 3 , wherein the inside of said bellows is evacuated. 8. The pressure and temperature of an electric device according to claim 5 , wherein a cap for hermetically covering the outside of said bellows and a space surrounded by said cap and said bellows are evacuated. Total. 9. A temperature sensing part for detecting a temperature of the rod-shaped thermometer, and an inner surface of the case are filled with a substance having a higher thermal conductivity than a refrigerant inside the electric device. The pressure thermometer for an electric device according to claim 4 . 10. A temperature sensing part for detecting a temperature of the rod-shaped thermometer is brought into contact with an inner surface of the case.
A pressure thermometer for an electric device according to claim 4 . 11. A claims, characterized in that as the temperature sensing unit for sensing the temperature of the rodlike thermometer, liquid immersed
Item 10. A pressure thermometer for an electric device according to item 9 .