JP2001050799A - Liquid level display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate need for opening and closing of a manhole lid, to simplify an equipment, and to easily allow confirmation wether a reservoir tank is empty or not. SOLUTION: A display main body 13 is attached onto an existing pipe 2 for exhaust equipped in a ceiling part 1a of a reservoir tank 1, and the display main body 13 is provided with a float member 8 movable vertically in response to vertical movement of a liquid level of the tank 1, a liquid level displaying member 10 moving vertically accompanied by the movement of the float member 8 to display a liquid level, and a guide rod 9 with the float member 8 fixed to its lower end and with the liquid level displaying member 10 fixed to its upper end.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid level display device for displaying whether or not a storage tank for storing oil discharged from a transformer at the time of a transformer accident at a substation, for example, is empty. About.

[0002]

2. Description of the Related Art Conventionally, storage tanks of this type are often buried underground with their surrounding walls made of concrete or metal, and when a transformer accident occurs, oil discharged from the transformer is introduced. I keep it. However, if rainwater or dew condensation water accumulates in the storage tank, the amount of introduced oil may exceed the capacity of the storage tank, causing the oil to overflow to the ground surface. You need to make sure it is in a state.

[0003] Conventionally, in order to confirm that the storage tank is empty, an operator opens a manhole cover provided in the storage tank and visually checks the storage tank.

[0004]

However, when confirming that the storage tank is empty as described above, an operator must open a heavy manhole cover and visually check the state. In addition, when the manhole cover is closed after the confirmation, especially in the case of an outdoor installation, a water leakage prevention means must be provided between the manhole and the manhole cover.

In order to solve this problem, there is also a means for electrically measuring the water level of the storage tank. However, this measuring means requires a large-scale facility, increases the number of failures, and deteriorates the maintainability. is there.

[0006] Transformer accidents occur rarely, and it is uneconomical to install such large-scale electrical measurement equipment as described above in order to deal with such rare accidents. There is also a problem that is.

The present invention has been made in view of the above circumstances, and does not require the opening and closing of a manhole cover, simplifies the equipment, and makes it possible to easily check whether or not the storage tank is empty. It is an object to provide a display device.

[0008]

In order to solve the above-mentioned problem, according to the first aspect of the present invention, a display device main body is attached to an existing exhaust pipe installed on a ceiling portion of a storage tank, The main body includes a float member that can move up and down corresponding to the liquid level of the storage tank, a liquid level display member that moves up and down with the movement of the float member to display a liquid level, and the float member. A guide rod fixed to the lower end and having the liquid level display member fixed to the upper end is provided.

According to the first aspect of the invention, the liquid level display member moves up and down with the movement of the float member to display the liquid level, so that the storage tank can be operated without opening and closing the manhole cover. It can be easily confirmed whether or not it is empty.

In addition, since the display device main body is attached to the existing exhaust pipe, it is not necessary to separately form an opening for mounting the display device main body on the ceiling portion of the storage tank or to newly install a mounting member. Therefore, the number of construction steps and the construction cost can be reduced.

According to a second aspect of the present invention, the float member according to the first aspect is connected to the lower end of the guide rod via an operation connecting means.

According to the second aspect of the present invention, since the guide rod is connected to the float member via the operation connecting means, the length of the guide rod can be shortened, and the size of the display device body can be reduced. It becomes possible.

According to a third aspect of the present invention, in the liquid level measuring device according to the first aspect, the display device main body is formed on the ceiling of the storage tank in place of the existing pipe for exhaust installed on the ceiling of the storage tank. It is characterized by being attached to the opening.

According to the third aspect of the present invention, the display device main body can be attached simply by fitting it into the opening formed in the ceiling of the storage tank, so that the construction can be performed very easily.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing a first embodiment of a liquid level measuring apparatus according to the present invention, and FIG. 2 is a sectional view showing a state before mounting the liquid level measuring apparatus of the first embodiment.

As shown in FIG. 2, a storage tank 1 for storing oil discharged in the event of a transformer accident at a substation.
Has a peripheral wall made of, for example, concrete, and an existing pipe 2 for exhaust is previously installed on the ceiling 1a.
The existing pipe 2 is a straight pipe 2 embedded in the ceiling 1a.
The elbow 2b, the straight pipe section 2c, and the elbow 2d are sequentially connected to a.

In the liquid level measuring device of the present embodiment, the elbow 2
b, after removing the straight pipe section 2c and the elbow 2d, FIG.
As shown in FIG. 1, a cheese 3 made of galvanized steel is fixed to the upper end of the straight pipe portion 2a of the existing pipe 2 by welding, and the straight pipe portion 2c and the elbow 2d of the existing pipe 2 are connected to the cheese 3 in this order. Used for exhaust inside.

That is, flanges 3a and 3b are fixed to the upper and lower ends of the cheese 3 by welding, and a flange 4 for attaching a guide pipe, which will be described later, is fixed to the flange 3a by a fastening member such as a bolt. It is fixed to the straight pipe portion 2a of the pipe 2. Further, a protection member described later is attached to the flange 3b via the flange 5.

The guide pipe 6 has an upper end fixed to the flange 4 and inserted through the straight pipe portion 2a of the existing pipe 2, and a lower end extending to near the bottom of the storage tank 1, and a plurality of flow pipes for flowing air. A hole 7 is drilled in the axial direction.

Inside the guide pipe 6, there is provided a float member 8 which is movable in a direction perpendicular to the liquid surface along the guide pipe 6, and this float member 8 is formed of a synthetic resin and made of stainless steel. A liquid level display member 10 that moves up and down with the movement of the float member 8 to display a liquid level is fixed to the lower end of the guide rod 9. Therefore, the guide rod 9 is connected to the flange 4,
It extends into the protection member 11 via the flange 3a, the cheese 3, the flange 3b and the flange 5.

The liquid level display member 10 moves up and down in a protection member 11 mounted on the flange 5, and the protection member 1
Numeral 1 is made of a transparent acrylic resin so that the vertical movement of the liquid level display member 10 can be seen, and has a double pipe structure provided outside the storage tank 1 to increase the strength.

The liquid level display member 10 in the protection member 11
The range of movement is set at a dangerous liquid level where rainwater and dew condensation water may accumulate in the storage tank 1 and may overflow when oil discharged from the transformer is introduced in the event of a transformer accident. I have. That is, when the liquid level display member 10 rises in the protection member 11, it indicates that rainwater, dew condensation water, and the like accumulate in the storage tank 1 and there is a danger.

Further, a guide flange 12 for guiding the axial movement of the guide rod 9 is provided between the flange 3b and the flange 5.

The display device main body 13 of the present embodiment is attached to the straight pipe portion 2a of the existing pipe 2 for exhaust, and is capable of moving up and down corresponding to the liquid level of the storage tank 1 and the float member 8; A guide pipe 6 in which a float member 8 is provided to guide the vertical movement of the float member 8, a liquid level display member 10 which moves up and down in the protection member 11 with the movement of the float member 8 to display a liquid level; And a guide rod 9 having a float member 8 fixed to the lower end and a liquid level display member 10 fixed to the upper end.

Next, the operation of the present embodiment will be described.

In the liquid level measuring device of the present embodiment, when the rainwater or dew condensation water accumulates in the storage tank 1 and the liquid level rises in the storage tank 1, the float member 8 moves the liquid along the inner wall of the guide pipe 6. Ascends perpendicular to the plane. Then, the liquid level display member 10 rises inside the protection member 11 via the guide rod 9, so that the worker can
It can be visually confirmed that rainwater, dew condensation water, and the like are stored inside.

As described above, according to the present embodiment, the display device main body 13 is attached via the flange 4 to the straight pipe portion 2a of the existing exhaust pipe 2 installed on the ceiling 1a of the storage tank 1. The guide pipe 6 and the guide pipe 6
A float member 8 movable in a direction perpendicular to the liquid surface along the inner wall of the pipe 2;
A transparent protection member 11 attached via the 3a, the cheese 3 and the flanges 3b, 5; and a liquid level display member 10 which moves up and down in the protection member 11 with the movement of the float member 8 to display the liquid level. , The float member 8 is fixed to the lower end, and the guide rod 9 to which the liquid level display member 10 is fixed to the upper end is provided, so that the equipment can be simplified and the manhole cover can be opened and closed. The water level of the storage tank 1 can be confirmed.

According to the present embodiment, the existing pipe 2
Pipe 2a, cheese 3, straight pipe 2c and elbow 2d
By attaching the display device main body 13 of the present embodiment to the existing pipe 2 while maintaining the exhaust function, an opening for mounting the liquid level measuring device is separately formed or mounted on the ceiling 1a of the storage tank 1. Since there is no need to newly install members, it is possible to reduce the number of construction steps and the construction cost.

Further, according to the present embodiment, the guide rod 9 can be moved up and down smoothly by being guided by the guide flange 12 provided in the axial direction thereof, The reliability of the device can be improved.

Furthermore, according to the present embodiment, the display device main body 13 is applied to the storage tank 1 for storing oil discharged in the event of a transformer accident at a substation, so that the oil from the storage tank 1 is removed. Overflow can be prevented beforehand.

FIG. 3 is a sectional view showing a second embodiment of the liquid level measuring device according to the present invention.

In this embodiment, the storage tank is applied to the same one as in the first embodiment, and is a storage tank 1 for storing oil discharged at the time of a transformer accident at a substation.
The peripheral wall is made of, for example, concrete, and an existing pipe 2 for exhaust is previously installed on the ceiling 1a thereof as in FIG.

In the liquid level measuring device of the present embodiment, an exhaust pipe 18 is attached to the upper end of the straight pipe portion 2a of the existing pipe 2. That is, this exhaust pipe 18 is
An elbow 20 is fixed to the bottom of the cheese 19 by welding, a chuck portion 21 is fixed to the lower end of the cheese 19, and the exhaust pipe 18 is attached to the straight pipe portion 2a via the chuck portion 21. The display device main body 22 is attached. Here, the chuck portion 21 is a chuck in which a plurality of set screws are radially implanted at predetermined intervals in a circumferential direction, and the chuck portion 21 is inserted into the straight pipe portion 2a and fixed with the set screw. I have to.

The display device main body 22 has a chuck portion 23, and is attached to the upper end of the cheese 19 via the chuck portion 23. The chuck portion 23 is
A chuck in which a plurality of setscrews are radially implanted at predetermined intervals in the circumferential direction in the same manner as described above. The chuck portion 23 is inserted into the upper end of the cheese 19 and fixed with the set screws. .

The display device main body 22 includes the chuck 2
A transparent protective member 24 made of resin is attached to the upper part of the device 3, and a scale 25 is attached to the protective member 24. Further, an upper end of a guide pipe 26 is attached to a lower portion of the chuck portion 23, and a connecting mechanism 27 composed of two plates is fixed to a lower end of the guide pipe 26.

A guide groove 28 is formed in a vertical direction of the connecting mechanism 27, and a slider 29 movable in the guide groove 28 is mounted. A support shaft 30 is mounted on a lower portion of the connection mechanism 27, and one end of a float rod 31 is fixed to the support shaft 30, and the other end of the float rod 31 corresponds to the upper and lower sides of the liquid level of the storage tank 1. A vertically movable float member 32 is fixed.

In the vicinity of the support shaft 30 of the float rod 31,
One end of the link 33 is attached by a rotation shaft 34, and the other end of the link 33 is supported by the slider 29. A lower end of a guide rod 35 is fixed to the slider 29, and the float member 3 is attached to an upper end of the guide rod 35.
A liquid level display member 36, which moves up and down in the protection member 24 with the movement of 2, to display the liquid level, is fixed.

Therefore, in this embodiment, the operation connecting means for operatively connecting the float member 32 and the guide rod 35 is constituted by the slider 29, the support shaft 30, the float rod 31, the link 33, and the rotation shaft.

Next, the operation of the present embodiment will be described.

In the liquid level measuring device of the present embodiment, when rainwater or dew condensation water accumulates in the storage tank 1 and the liquid level rises in the storage tank 1, the float member 32 is supported in response to the rise in the liquid level. It rotates around the shaft 30. Then, the slider 29 is moved upward in the guide groove 28 via the rotation shaft 34 of the float rod 31 and the link 33.

As a result, the guide rod 35 rises, and the liquid level display member 36 rises inside the protection member 24, and the scale 25
By reading the vertical position of the liquid level display member 36 with respect to, the operator can visually confirm that rainwater, dew water, and the like are stored in the storage tank 1.

As described above, according to the present embodiment, the exhaust pipe 18 attached to the straight pipe section 2a of the existing exhaust pipe 2 installed on the ceiling 1a of the storage tank 1, and the exhaust pipe 18 A transparent protection member 24 attached to the upper part of the storage tank 1, a float member 32 that can move up and down corresponding to the level of the liquid in the storage tank 1, and a vertical movement within the protection member 24 with the movement of the float member 32. The lower end is connected to the float member 32 via the operation connecting means, while the lower end is connected to the float member 32 via the operation connecting means.
6 is provided with the guide rod 35 to which it is fixed, as in the first embodiment, the equipment can be simplified, and the water level of the storage tank 1 can be confirmed without opening and closing the manhole cover. Can be.

According to the present embodiment, the existing pipe 2
By attaching the exhaust pipe 18 to the straight pipe portion 2a of the storage tank 1 and attaching the display device main body 22 to the exhaust pipe 18, an opening for mounting the liquid level measuring device is separately formed in the ceiling 1a of the storage tank 1. In addition, since it is not necessary to newly install a mounting member, it is possible to reduce the number of construction steps and the construction cost.

Further, since the guide rod 35 is connected to the float member 32 via the operation connecting means, the length of the guide rod 35 can be shortened, and the display device main body 22 can be used.
Can be reduced in size.

FIG. 4 is a sectional view showing a modification of the second embodiment of the liquid level measuring device according to the present invention. The same portions as those in the second embodiment are denoted by the same reference numerals, and the configuration and operation of the liquid level measuring device are the same as those in the second embodiment, and thus description thereof will be omitted.

In this modification, the display device main body 22 is attached to the opening 37 formed in the ceiling 1a of the storage tank 1 without using the existing exhaust pipe as in the first and second embodiments. It is a thing. That is, the opening 3
The display device main body 22 is attached to the storage tank 1 by directly fitting the chuck portion 23 of the display device main body 22 into 7.

Therefore, according to the above-described modification, the display device main body 22 can be attached simply by fitting the display device main body 22 into the opening 37 formed in the ceiling portion 1a of the storage tank 1, so that it is extremely easy. It is possible to work on.

The present invention can be variously modified without being limited to the above embodiments and modified examples. For example, in each of the above embodiments and modifications, the case where the present invention is applied to a storage tank for storing oil discharged at the time of a transformer accident in a substation has been described, but the present invention is also applied to other water storage tanks and the like. be able to.

[0050]

As described above, according to the present invention,
Since the liquid level display member moves up and down with the movement of the float member to display the liquid level, it is possible to check whether the storage tank is empty without opening and closing the manhole cover. it can.

In addition, since the display device main body is attached to the existing exhaust pipe, an opening for mounting the liquid level measuring device can be separately formed on the ceiling of the storage tank, or a new mounting member can be installed. Since this is eliminated, the number of construction steps and the construction cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of a liquid level measuring device according to the present invention.

FIG. 2 is a cross-sectional view showing a state before mounting the liquid level measuring device according to the first embodiment.

FIG. 3 is a sectional view showing a second embodiment of the liquid level measuring device according to the present invention.

FIG. 4 is a cross-sectional view showing a modification of the second embodiment of the liquid level measuring device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Storage tank 1a Ceiling part 2 Existing pipe 2a Straight pipe part 2b Elbow 2c Straight pipe part 2d Elbow 3 Cheese 3a, 3b Flange 4 Flange 5 Flange 6 Guide pipe 7 Flow hole 8 Float member 9 Guide rod 10 Liquid level display member 11 Protection Member 12 Guide flange 13 Display device main body 18 Exhaust pipe 19 Cheese 20 Elbow 21 Chuck portion 22 Display device main body 23 Chuck portion 24 Protective member 25 Scale 26 Guide pipe 27 Connecting mechanism 28 Guide groove 29 Slider 30 Support shaft 31 Float rod 32 Float Member 33 Link 34 Rotating shaft 35 Guide rod 36 Liquid level display member 37 Opening

Claims (3)

[Claims] 1. A display device main body is attached to an existing exhaust pipe installed on a ceiling portion of a storage tank, and the display device main body is a float member that can move up and down corresponding to the level of the liquid level of the storage tank. A liquid level display member that moves up and down with the movement of the float member to display a liquid level, and a guide rod that has the float member fixed to the lower end while the liquid level display member is fixed to the upper end. A liquid level measuring device comprising: 2. The liquid level measuring device according to claim 1, wherein the float member is connected to a lower end of the guide rod via an operation connecting means. 3. The liquid level measuring device according to claim 1, wherein
A liquid level measuring device, wherein the display device main body is attached to an opening formed in the ceiling instead of an existing exhaust pipe installed in the ceiling of the storage tank.