CN112824840A

CN112824840A - Oil level indicator

Info

Publication number: CN112824840A
Application number: CN201911147765.7A
Authority: CN
Inventors: 程启忠; 董新文; 王庆; 刘学萌; 柯昌红; 朱修桥; 王勇; 王承君; 刘伟; 潘海涛; 张惠玲; 黄建国; 向青松; 何静; 田金生
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2019-11-21
Filing date: 2019-11-21
Publication date: 2021-05-21
Anticipated expiration: 2039-11-21
Also published as: CN112824840B

Abstract

The utility model discloses an oil level gaugember belongs to oil-immersed electrical equipment technical field. The oil level gauge comprises an oil pipe, a floater, a magnet, a thermometer, a magnetic liquid level gauge and a pressure release valve; the floater can be arranged in the oil pipe in a sliding way, and the magnet is fixedly arranged on the floater; the first end of the oil pipe is provided with a connecting part for connecting with the oil-immersed electrical equipment, and the pressure release valve is arranged at the second end of the oil pipe and is detachably and hermetically connected with the oil pipe; the inner wall of the oil pipe is provided with a blind pipe, and the thermometer is arranged in the blind pipe and is used for measuring the temperature of oil in the oil pipe; the outer wall of the oil pipe is also provided with an installation cavity, the magnetic liquid level meter is arranged in the installation cavity, and the red and white overturning parts in the magnetic liquid level meter are driven to overturn according to the position of the magnet in the oil pipe, so that the oil height in the oil pipe is displayed; the oil pipe is provided with a thermometer observation window and an oil level observation window. The oil level indicator can realize multifunctional high integration of oil level display, temperature display, oil injection, pressure release and the like, reduces the structural size, and can be used in a non-electric environment.

Description

Oil level indicator

Technical Field

The disclosure relates to the technical field of oil-immersed electrical equipment, in particular to an oil level indicator.

Background

The oil-immersed electrical equipment is a common equipment in a power system, has functions of oil level monitoring, temperature monitoring and the like during operation, and can perform pressure release during oil injection and oil discharge and fault, so that the essential basic condition for safe and reliable operation of the oil-immersed electrical equipment is realized.

Traditional oily formula electrical equipment includes functional components such as oil level gaugember, thermometer, notes oil pipe and pressure release valve usually, and wherein, the oil level gaugember can be used for realizing oil level monitor function, and the thermometer can be used for realizing temperature monitor function, and the notes oil pipe can be used for realizing annotating the oil drain function, and pressure release valve can be used for carrying out pressure release when the trouble.

However, the functional components are all dispersed and independent structures, and occupy a large space in the oil-filled electrical equipment. And a plurality of functional components need to be monitored and controlled in the operation process of the oil-immersed electrical equipment so as to ensure the safe operation of the oil-immersed electrical equipment, and the low working efficiency can be caused. And the existing oil level gauge usually needs to be electrified for detection, and has certain requirements on the use environment.

Disclosure of Invention

The embodiment of the disclosure provides an oil level gauge, which can realize multifunctional high integration of oil level display, temperature display, oil injection, pressure release and the like, effectively reduce the structural size, improve the working efficiency and be used in a non-electric environment. The technical scheme is as follows:

the present disclosure provides an oil level gauge comprising an oil tube, a float, a magnet, a thermometer, a magnetic level gauge, and a pressure relief valve;

the oil pipe is a hollow pipe column, one end of the floater is slidably arranged in the oil pipe, the other end of the floater extends out of the oil pipe, and the magnet is fixedly arranged on the floater and is positioned in the oil pipe; the oil pipe is provided with a first end and a second end which are opposite, the first end of the oil pipe is provided with a connecting part used for being connected with oil-filled electrical equipment, and the pressure release valve is arranged at the second end of the oil pipe and is detachably connected with the oil pipe in a sealing manner;

a blind pipe with one closed end and one open end is arranged on the inner wall of the oil pipe, the open end of the blind pipe is close to the first end of the oil pipe, and the thermometer is arranged in the blind pipe; the outer wall of the oil pipe is also provided with an installation cavity, the magnetic liquid level meter is arranged in the installation cavity, and the magnetic liquid level meter is magnetically coupled with the magnet; and the oil pipe is provided with a thermometer observation window for observing the number of the thermometer and an oil level observation window for observing the number of the magnetic liquid level meter.

Further, the magnetic liquid level meter is a magnetic turning column liquid level meter or a magnetic turning plate liquid level meter.

Further, the thermometer observation window and the oil level observation window are adjacently arranged.

Further, the thermometer is a fluorescence thermometer.

Further, the oil level indicator further comprises a rain cover, and the rain cover is covered outside the pressure release valve.

Further, connecting portion include flange board and connecting bolt, be equipped with a plurality of bolt holes along its circumference on the flange board, every all be equipped with in the bolt hole connecting bolt.

Further, the oil level gauge further includes a seal member disposed between the flange plate and the oil-filled electrical device.

Further, a gap is formed between the float and the inner wall of the oil pipe.

Further, the floater is provided with a hollow pattern, and the hollow pattern is communicated with the oil pipe and the outside.

Furthermore, a blind pipe avoiding groove extending along the length direction of the floater is arranged on the side wall of the floater.

Further, an inner flange is arranged on the inner wall of the first end of the oil pipe, an outer flange is arranged on the side wall of the float, and the outer flange is positioned on one side, close to the pressure release valve, of the inner flange.

Further, the pressure relief valve is in threaded connection with the tubing.

The technical scheme provided by the embodiment of the disclosure has the following beneficial effects:

by arranging the oil level indicator, the thermometer is arranged in the oil level indicator, oil level display can be realized, the pressure release valve in the oil level indicator is detachably and hermetically connected with the second end of the oil pipe, and the pressure release valve can be detached from the oil pipe when oil needs to be filled, so that the oil is filled from the second end of the oil pipe. And when the pressure in the oil pipe is higher, a pressure relief valve can be adopted for pressure relief. Meanwhile, the oil level meter adopts a magnetic liquid level meter and a magnet to measure the oil height in the oil pipe in a magnetic coupling mode, oil level display can be achieved without electrifying, the oil level meter can be suitable for a non-electricity environment, and the application range is wider. The oil level indicator realizes multifunctional high integration of oil level display, temperature display, oil injection, pressure release and the like, has smaller occupied volume and more convenient and quicker use, is used for oil-immersed electrical equipment, and can improve the working efficiency of detecting the oil-immersed electrical equipment by workers.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

FIG. 1 is a cross-sectional view of an oil level gauge provided by an embodiment of the present disclosure;

FIG. 2 is a schematic structural view of an oil level gauge provided by an embodiment of the present disclosure;

FIG. 3 is a cross-sectional view of a float provided by an embodiment of the present disclosure;

fig. 4 is a sectional view a-a of fig. 3.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

Fig. 1 is a sectional view of an oil level gauge provided by an embodiment of the present disclosure, which includes an oil pipe 10, a float 20, a magnet 30, a thermometer 40, a magnetic liquid level gauge 50, and a pressure relief valve 60, as shown in fig. 1.

The tubing 10 is a hollow tubular string and one end of the float 20 is slidably arranged in the tubing 10 and the other end of the float 20 extends out of the tubing 10. The magnet 30 is fixedly disposed on the float 20 and within the tubing 10. Tubing 10 has opposite first and second ends. The first end of the oil pipe 10 is provided with a connecting part 11 for connecting with the oil-filled electrical equipment, and the pressure relief valve 60 is arranged at the second end of the oil pipe 10 and is detachably connected with the oil pipe 10 in a sealing way.

The inner wall of the oil pipe 10 is provided with a blind pipe 12 with one closed end and one open end. The open end of the blind pipe 12 is close to the first end of the oil pipe 10, and the thermometer 40 is arranged in the blind pipe 12. The outer wall of the oil pipe 10 is further provided with a mounting cavity S, the magnetic liquid level meter 50 is arranged in the mounting cavity S, and the magnetic liquid level meter 50 is magnetically coupled with the magnet 30.

Fig. 2 is a schematic structural diagram of an oil level gauge provided by an embodiment of the present disclosure, and as shown in fig. 2, a thermometer observation window 10a for observing the indication number of the thermometer 40 and an oil level observation window 10b for observing the indication number of the magnetic liquid level gauge 50 are arranged on the oil pipe 10.

The magnetic coupling means that the magnet 30 and the magnetic liquid level meter 50 interact with each other through a magnetic field, so that the liquid level height displayed by the magnetic liquid level meter 50 changes along with the position change of the magnet 30 in the oil pipe 10.

The oil level indicator is provided with the thermometer, so that oil level display can be realized, the pressure release valve in the oil level indicator is detachably and hermetically connected with the second end of the oil pipe, and the pressure release valve can be detached from the oil pipe when oil is required to be filled, and oil is filled from the second end of the oil pipe. And when the pressure in the oil pipe is higher, a pressure relief valve can be adopted for pressure relief. Meanwhile, the oil level meter adopts a magnetic liquid level meter and a magnet to measure the oil height in the oil pipe in a magnetic coupling mode, oil level display can be achieved without electrifying, the oil level meter can be suitable for a non-electricity environment, and the application range is wider. The oil level indicator realizes multifunctional high integration of oil level display, temperature display, oil injection, pressure release and the like, has smaller occupied volume and more convenient and quicker use, is used for oil-immersed electrical equipment, and can improve the working efficiency of detecting the oil-immersed electrical equipment by workers.

The oil level indicator provided by the embodiment of the disclosure can be used for measuring the oil level height of oil in oil-filled electrical equipment. In particular use, the connection part of the oil level indicator can be connected with an oil-filled electrical device, and one end of the float 20 in the oil level indicator, which extends out of the oil pipe, can be located in oil of the oil-filled device. When the oil level in the oil-filled electrical apparatus is lowered, the position of the float 20 in the oil pipe 10 is lowered, and when the oil level in the oil-filled electrical apparatus is raised, the position of the float 20 in the oil pipe 10 is raised, and the operator can observe the indication of the magnetic level gauge 50 through the oil level observation window 10 b. When need the oiling among the oily formula electrical equipment, can dismantle pressure release valve 60, from the second end of oil pipe to oil pipe oiling, make during fluid flows to oily formula electrical equipment through the oil pipe, accomplish the oiling operation.

In one implementation of the present disclosure, there is a gap between the float 20 and the inner wall of the oil pipe 10, so that when the oil filling operation is performed, oil can flow from the gap between the float 20 and the inner wall of the oil pipe 10 into the oil-filled electrical device connected to the oil level gauge without taking out the float 20.

In another implementation of the present disclosure, the float 20 has a hollow pattern thereon, and the hollow pattern communicates the oil pipe 10 with the outside. When the oil filling operation is performed, the oil can flow from the cutout pattern on the float 20 to the oil-filled electrical device connected to the oil level gauge.

In another implementation of the present disclosure, the float 20 has a gap with the inner wall of the oil pipe 10, and the float 20 has a hollow pattern thereon.

Fig. 3 is a cross-sectional view of a float according to an embodiment of the present disclosure, as shown in fig. 3, a blind pipe avoiding groove 20a extending in a length direction of the float 20 is formed on a side wall of the float 20, and the blind pipe 20 is located in the blind pipe avoiding groove 20 a. When the float 20 moves up and down in the tubing 10, the blind pipe 12 is located in the blind pipe avoiding groove 20a to prevent the blind pipe 12 from interfering with the movement of the float 20.

In the present embodiment, the length of the blind avoiding groove 20a is smaller than the axial length of the float 20, and the blind 12 can also play a certain role in blocking and preventing the float 20 from being positioned too high in the oil pipe 10.

Fig. 4 is a sectional view a-a of fig. 3, and as shown in fig. 4, in the present embodiment, the cross section of the float 20 is a quadrangle. In actual arrangement, the cross-sectional shape of the float 20 may be circular or polygonal.

Further, an inner flange 13 (see fig. 1) is provided on the inner wall of the first end of the tubing 10, and an outer flange 21 (see fig. 3) is provided on the side wall of the float 20, and the outer flange 21 is located on the side of the inner flange 13 close to the pressure relief valve 60 to limit the float 20 and prevent the float 20 from being pulled out from the first end of the tubing 10.

Optionally, the axis of the blind pipe 12 is parallel to the axis of the oil pipe 10, and the thermometer 40 is vertically disposed in the blind pipe 12 along the axis of the blind pipe 12 so as to read the indication of the thermometer 40.

It should be noted that the bottom of the thermometer 40 may be disposed to extend out of the blind pipe 12 so as to detect the temperature of the oil in the oil pipe 10. The maximum level of oil in the oil pipe 10 does not exceed the open end of the blind pipe 12.

Alternatively, the thermometer viewing window 10a may be a sealed chamber formed of double glazing, and the double glazing may serve to magnify the thermometer readings. The oil level observation window 10b may be a glass window opened outside the installation cavity S for observing the magnetic level gauge 50.

Further, the thermometer observation window 10a and the oil level observation window 10b are adjacently disposed, so that the operator can observe the indications of the thermometer 40 and the magnetic liquid level gauge 50 at the same time, and the integration of the oil level gauge is higher.

In the present embodiment, the magnetic level gauge 50 is a magnetic flip-column level gauge or a magnetic flip-plate level gauge.

Wherein, the upset portion of magnetism turn over post level gauge is cylindrical, and the magnet steel has been laid equally to inside, and its magnetic pole is on cylindrical positive and negative semicircle post, and the upset portion shape is cylindrical, and the material of upset portion generally uses more of plastics, for being suitable for the ultra-temperature operating mode.

The turnover part of the magnetic turning plate liquid level meter is in a rectangular square shape and is similar to a flat plate type, cylindrical magnetic steel is placed inside the turnover part, magnetic poles of the magnetic steel are arranged on two sides of the turnover part, and the turnover part is usually made of aluminum alloy and plastic.

In this implementation, the magnet 30 moves up and down with the float 20 in the tubing 10 as the fluid level in the tubing increases or decreases. Under the magnetic force of the magnet 30, the magnetic liquid level meter 50 drives the red and white overturning parts in the magnetic liquid level meter 50 to overturn by 180 degrees. When the liquid level rises, the turnover part turns from white to red, when the liquid level falls, the turnover part turns from red to white, and the boundary positions of red and white are the actual height of the liquid level of the medium in the container, so that the liquid level can be indicated.

Further, the thermometer 40 is a fluorescence thermometer 40. By providing the thermometer 40 in a fluorescent configuration, reading of the thermometer readings may be facilitated during nighttime conditions of darkness.

Further, referring to fig. 1, the oil level indicator further includes a rain cover 70, and the rain cover 70 covers the pressure relief valve 60, so as to protect the pressure relief valve 60.

The rain cover 70 can be made of plastic material.

Further, the connecting portion 11 includes a flange plate 111 and a connecting bolt 112, the flange plate 111 is provided with a plurality of bolt holes along a circumferential direction thereof, and each bolt hole is provided with the connecting bolt 112. The flange plate 111 at the first end of the oil pipe 10 and the flange plate of the oil-filled electrical device can be connected and fixed by the connecting bolt 112.

Further, the side of the flange plate 111 remote from the pressure relief valve 60 has an annular seal groove in which the seal 80 is disposed. By providing the seal member 80, leakage of oil in the oil pipe from between the flange plate 111 and the oil-filled electrical device can be prevented.

In this embodiment, the seal 80 may be an annular seal ring.

Further, the oil pipe 10 is a cast aluminum pipe which is light in weight, corrosion resistant, and low in cost.

Further, the float 20 is a plastic float 20, which is easy to manufacture.

Further, the pressure relief valve 60 is screwed with the oil pipe 10, and may play a role in sealing the inside of the oil pipe.

In particular use, one end of the float 20 may be extended into the oil pipe 10 from the second end of the oil pipe 10, such that one end of the float 20 extends from the first end of the oil pipe 10 into the oil-filled electrical device through the inner bore of the outer flange 13. While the other end of the float 20 is snapped onto the outer flange 13. Then the pressure release valve 60 is connected with the second end of the oil pipe 10 through threads, and finally the rain cover 70 is covered outside the pressure release valve 60.

The above description is intended to be exemplary only and not to limit the present disclosure, and any modification, equivalent replacement, or improvement made without departing from the spirit and scope of the present disclosure is to be considered as the same as the present disclosure.

Claims

1. An oil level gauge, characterized in that it comprises an oil tube (10), a float (20), a magnet (30), a thermometer (40), a magnetic level gauge (50), and a pressure relief valve (60);

the oil pipe (10) is a hollow pipe column, the floater (20) is slidably arranged in the oil pipe (10), one end of the floater (20) is positioned outside the oil pipe (10), and the magnet (30) is fixedly arranged on the floater (20) and positioned in the oil pipe (10); the oil pipe (10) is provided with a first end and a second end which are opposite, the first end of the oil pipe (10) is provided with a connecting part (11) used for being connected with oil-filled electrical equipment, and the pressure release valve (60) is arranged at the second end of the oil pipe (10) and is detachably connected with the oil pipe (10) in a sealing mode;

a blind pipe (12) with one closed end and one open end is arranged on the inner wall of the oil pipe (10), the open end of the blind pipe (12) is close to the first end of the oil pipe (10), and the thermometer (40) is arranged in the blind pipe (12); the outer wall of the oil pipe (10) is further provided with an installation cavity (S), the magnetic liquid level meter (50) is arranged in the installation cavity (S), and the magnetic liquid level meter (50) is magnetically coupled with the magnet (30); and a thermometer observation window (10a) for observing the indication number of the thermometer (40) and an oil level observation window (10b) for observing the indication number of the magnetic liquid level meter (50) are arranged on the oil pipe (10).

2. Oil level indicator according to claim 1, characterized in that said magnetic level gauge (50) is a magnetic flip-column level gauge or a magnetic flip-plate level gauge.

3. Oil level indicator according to claim 1 or 2, characterized in that the thermometer viewing window (10a) and the oil level viewing window (10b) are adjacently arranged.

4. Oil level indicator according to claim 1 or 2, characterized in that the thermometer (40) is a fluorescence thermometer.

5. Oil level indicator according to claim 1 or 2, characterized in that it further comprises a rain shield (70), said rain shield (70) being housed outside said pressure relief valve (60).

6. Oil level indicator according to claim 1 or 2, characterized in that the connecting portion (11) comprises a flange plate (111) and a connecting bolt (112), the flange plate (111) being provided with a plurality of bolt holes along its circumference, each bolt hole being provided with the connecting bolt (112).

7. Oil level indicator according to claim 6, characterized in that the flange plate (111) has an annular sealing groove in the side remote from the pressure relief valve (60), in which a seal (80) is arranged.

8. Oil level indicator according to claim 1 or 2, characterized in that there is a clearance between the float (20) and the inner wall of the oil pipe (10).

9. Oil level indicator according to claim 1 or 2, characterized in that the float (20) has a cut-out pattern thereon, which communicates the oil pipe (10) with the outside.

10. Oil level indicator according to claim 1 or 2, characterized in that a blind pipe avoiding groove (20a) extending in the length direction of the float (20) is provided on the side wall of the float (20).

11. Oil level indicator according to claim 1 or 2, characterized in that the inner wall of the first end of the oil pipe (10) is provided with an inner flange (13), and the float (20) has an outer flange (21) on its side wall, the outer flange (21) being located on the side of the inner flange (13) close to the pressure relief valve (60).

12. Oil level indicator according to claim 1 or 2, characterized in that the pressure relief valve (60) is screwed with the oil pipe (10).