CN112824840B

CN112824840B - Oil level gauge

Info

Publication number: CN112824840B
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: 2023-07-25
Anticipated expiration: 2039-11-21
Also published as: CN112824840A

Abstract

The disclosure discloses an oil level gauge, belonging to the technical field of oil-immersed electrical equipment. 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 is slidably arranged in the oil pipe, 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 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, the thermometer is arranged in the blind pipe, and the temperature of oil in the oil pipe is measured; 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 turnover parts in the magnetic liquid level meter are driven to turn over according to the position of the magnet in the oil pipe, so that the oil liquid level 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 gauge can realize multifunctional high integration of oil level display, temperature display, oil injection, pressure release and the like, reduce the structural size and can be used in an electroless environment.

Description

Oil level gauge

Technical Field

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

Background

The oil-immersed electrical equipment is common equipment in an electric power system, has functions of oil level monitoring, temperature monitoring and the like in operation, and can release pressure when oil is injected and discharged and fails, so that the oil-immersed electrical equipment is an essential basic condition for safe and reliable operation.

Conventional oil-immersed electrical equipment typically includes functional components such as an oil level gauge, a thermometer, an oil filler pipe, and a pressure relief valve, wherein the oil level gauge may be used to implement an oil level monitoring function, the thermometer may be used to implement a temperature monitoring function, the oil filler pipe may be used to implement an oil filler-drain function, and the pressure relief valve may be used to perform pressure relief upon failure.

However, the functional components are all of a scattered and independent structure, and occupy a large space in the oil-immersed 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 working efficiency is low. And the existing oil level gauge generally 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, oiling, pressure release and the like, effectively reduces the structural size, improves the working efficiency and can be used in an electroless environment. The technical scheme is as follows:

the present disclosure provides an oil level gauge comprising an oil pipe, 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 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 immersed type electric 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 with one closed end and one open end, one 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; the oil pipe is provided with a thermometer observation window for observing the thermometer indication number and an oil level observation window for observing the magnetic liquid level indicator indication number.

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

Further, the thermometer viewing window and the oil level viewing window are disposed adjacent.

Further, the thermometer is a fluorescent thermometer.

Further, the oil level gauge further includes a rain cover provided outside the pressure relief valve.

Further, the connecting portion comprises a flange plate and connecting bolts, a plurality of bolt holes are formed in the flange plate along the circumferential direction of the flange plate, and each of the bolt holes is internally provided with the connecting bolts.

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

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

Further, the float is provided with a hollowed pattern, and the hollowed pattern is communicated with the oil pipe and the outside.

Further, blind pipe avoiding grooves extending along the length direction of the floater are formed in 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 floater, and the outer flange is positioned on one side of the inner flange, which is close to the pressure release valve.

Further, the pressure relief valve is threadably coupled to the oil line.

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

through setting up an oil level gauge, be equipped with the thermometer in this oil level gauge, can realize that the oil level shows and the pressure relief valve in this oil level gauge is with the second end detachably sealing connection of oil pipe, can dismantle pressure relief valve and oil pipe when needing the oiling, follow the second end oiling of oil pipe. And when the pressure in the oil pipe is high, the pressure release valve can be adopted for pressure release. Meanwhile, the oil level indicator adopts magnetic liquid level meter and magnet magnetic coupling to measure the oil level in the oil pipe, so that oil level display can be realized without electrifying, the oil level indicator can be suitable for an electroless environment, and the application range is wider. The oil level gauge realizes the multifunctional high integration of oil level display, temperature display, oil injection, pressure release and the like, occupies smaller volume, is simpler, more convenient and faster to use, is used in 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 of the embodiments of the present disclosure, the drawings required for the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

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 in 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

For the purposes of clarity, technical solutions and advantages of the present disclosure, the following further details the embodiments of the present disclosure with reference to the accompanying drawings.

Fig. 1 is a sectional view of an oil level gauge provided in an embodiment of the present disclosure, and as shown in fig. 1, the oil level gauge includes an oil pipe 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 string, one end of the float 20 is slidably disposed in the oil pipe 10, and the other end of the float 20 extends out of the oil pipe 10. The magnet 30 is fixedly disposed on the float 20 and is located within the oil pipe 10. The tubing 10 has opposite first and second ends. The first end of the oil pipe 10 is provided with a connection portion 11 for connection with an oil-filled electrical device, and a pressure relief valve 60 is provided at the second end of the oil pipe 10 and is detachably and sealingly connected with the oil pipe 10.

The inner wall of the oil pipe 10 is provided with a blind pipe 12 with one end closed and the other end open. The open end of the blind pipe 12 is adjacent to the first end of the oil pipe 10 and a thermometer 40 is provided in the blind pipe 12. The outer wall of the oil pipe 10 is also provided with a mounting cavity S, and 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 view of the structure of an oil level gauge according to an embodiment of the present disclosure, and as shown in fig. 2, a thermometer observation window 10a for observing the readings of the thermometer 40 and an oil level observation window 10b for observing the readings of the magnetic level gauge 50 are provided on the oil pipe 10.

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

According to the embodiment of the disclosure, the oil level indicator is provided with the thermometer, oil level display can be achieved, the pressure release valve in the oil level indicator is detachably connected with the second end of the oil pipe in a sealing mode, and when oil injection is needed, the pressure release valve can be detached from the oil pipe, and oil is injected from the second end of the oil pipe. And when the pressure in the oil pipe is high, the pressure release valve can be adopted for pressure release. Meanwhile, the oil level indicator adopts magnetic liquid level meter and magnet magnetic coupling to measure the oil level in the oil pipe, so that oil level display can be realized without electrifying, the oil level indicator can be suitable for an electroless environment, and the application range is wider. The oil level gauge realizes the multifunctional high integration of oil level display, temperature display, oil injection, pressure release and the like, occupies smaller volume, is simpler, more convenient and faster to use, is used in oil-immersed electrical equipment, and can improve the working efficiency of detecting the oil-immersed electrical equipment by workers.

The oil level gauge provided by the embodiment of the disclosure can be used for measuring the oil level of oil in oil-immersed electrical equipment. In particular use, the connection of the oil level gauge may be connected to an oil-filled electrical device, and the end of the float 20 in the oil level gauge extending beyond the oil pipe may be located in the 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 10b. When oil injection is needed in the oil-immersed electrical equipment, the pressure release valve 60 can be disassembled, oil is injected into the oil pipe from the second end of the oil pipe, so that the oil flows into the oil-immersed electrical equipment through the oil pipe, and the oil injection operation is completed.

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 oil can flow from the gap between the float 20 and the inner wall of the oil pipe 10 to the oil-immersed electrical equipment connected to the oil level gauge without taking out the float 20 when the oil filling operation is performed.

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

In yet another implementation of the present disclosure, there is a gap between the float 20 and the inner wall of the oil pipe 10, and the float 20 has a hollowed-out pattern thereon.

Fig. 3 is a cross-sectional view of a float provided in an embodiment of the present disclosure, and as shown in fig. 3, a blind pipe escape groove 20a extending in a length direction of the float 20 is provided on a sidewall of the float 20, and the blind pipe 20 is positioned in the blind pipe escape groove 20 a. When the float 20 moves up and down in the oil pipe 10, the blind pipe 12 is positioned in the blind pipe avoiding groove 20a to prevent the blind pipe 12 from interfering with the movement of the float 20.

In this embodiment, the length of the blind pipe avoiding groove 20a is smaller than the axial length of the float 20, so that the blind pipe 12 can also play a role in blocking to prevent the float 20 from being 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 this embodiment, the cross section of the float 20 is quadrangular. In actual setting, the cross-sectional shape of the float 20 may be set to be circular or polygonal.

Further, an inner flange 13 (see fig. 1) is provided on the inner wall of the first end of the oil pipe 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 release valve 60, so as to limit the float 20 and prevent the float 20 from being pulled out of the first end of the oil pipe 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 to facilitate reading the reading of the thermometer 40.

It should be noted that the bottom of the thermometer 40 may extend out of the blind pipe 12 to facilitate the detection of 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 function 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 provided adjacently, so that an operator can observe the readings of the thermometer 40 and the magnetic level meter 50 at the same time, and the integration level of the oil level meter is higher.

In this embodiment, the magnetic level gauge 50 is a magnetic inversion column level gauge or a magnetic inversion plate level gauge.

Wherein the turnover part of the magnetic turnover column liquid level meter is cylindrical, the inside is also provided with magnetic steel, the magnetic poles of the magnetic steel are arranged on the front half cylinder and the back half cylinder of the cylinder, the shape of the turnover part is cylindrical, and the turnover part is made of more plastic and is suitable for the ultra-high temperature working condition.

The turnover part of the magnetic turnover plate liquid level meter is rectangular square, is similar to a flat plate, is internally provided with cylindrical magnetic steel, magnetic poles of the magnetic steel are arranged on two sides of the turnover part, and the turnover part is made of two materials, namely aluminum alloy and plastic.

In this implementation, the magnet 30 moves up and down with the float 20 in the tubing 10 as the level of liquid in the tubing rises or falls. The magnetic level meter 50 drives the red and white turning parts in the magnetic level meter 50 to turn 180 degrees under the action of the magnetic force of the magnet 30. When the liquid level rises, the turning part turns from white to red, and when the liquid level falls, the turning part turns from red to white, and the red and white boundary positions are the actual height of the medium liquid level in the container, so that the indication of the liquid level can be realized.

Further, the thermometer 40 is a fluorescent thermometer 40. By arranging the thermometer 40 in a fluorescent configuration, reading the thermometer's reading can be facilitated in the night-time non-light state.

Further, referring to fig. 1, the oil level gauge further includes a rain cover 70, and the rain cover 70 is provided outside the pressure release valve 60 to protect the pressure release valve 60.

The rain cover 70 may be made of a plastic material.

Further, the connection portion 11 includes a flange plate 111 and connection bolts 112, a plurality of bolt holes are provided in the flange plate 111 along the circumferential direction thereof, and the connection bolts 112 are provided in each of the bolt holes. The flange plate 111 at the first end of the oil pipe 10 and the flange plate of the oil-immersed electrical equipment can be connected and fixed through the connecting bolts 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 80, oil in the oil pipe can be prevented from leaking between the flange plate 111 and the oil-immersed electrical equipment.

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

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

Further, the float 20 is a plastic float 20 to facilitate manufacturing shaping.

Further, the pressure relief valve 60 is screwed into the oil pipe 10, and can seal the inside of the oil pipe.

In particular use, one end of the float 20 may be extended into the oil tube 10 from the second end of the oil tube 10 such that one end of the float 20 extends from the first end of the oil tube 10 into the oil-filled electrical device through the inner bore of the outer flange 13. While the other end of the float 20 snaps over the outer flange 13. The pressure relief valve 60 is then threaded onto the second end of the tubing 10 and finally a rain cover 70 is provided over the pressure relief valve 60.

The foregoing description of the preferred embodiments of the present disclosure is provided for the purpose of illustration only, and is not intended to limit the disclosure to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, alternatives, and alternatives falling within the spirit and principles of the disclosure.

Claims

1. An oil level gauge characterized by comprising an oil pipe (10), a float (20), a magnet (30), a thermometer (40), a magnetic level gauge (50) and a pressure release 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 immersed type electric 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;

the inner wall of the oil pipe (10) is provided with a blind pipe (12) with one end being closed and one end being open, the axis of the blind pipe (12) is parallel to the axis of the oil pipe (10), one end of the open of the blind pipe (12) is close to the first end of the oil pipe (10), the thermometer (40) is vertically arranged in the blind pipe (12) along the axis of the blind pipe (12), the bottom of the thermometer (40) extends out of the blind pipe (12), and the thermometer (40) is a fluorescent thermometer; the outer wall of the oil pipe (10) is also provided with an installation cavity (S), the magnetic liquid level meter (50) is arranged in the installation cavity (S), the magnetic liquid level meter (50) is magnetically coupled with the magnet (30), and the magnetic liquid level meter (50) is a magnetic turnover column liquid level meter or a magnetic turnover plate liquid level meter; the oil pipe (10) is provided with a thermometer observation window (10 a) for observing the readings of the thermometer (40) and an oil level observation window (10 b) for observing the readings of the magnetic liquid level meter (50), the thermometer observation window (10 a) and the oil level observation window (10 b) are adjacently arranged, the thermometer observation window (10 a) is a sealed cavity formed by double-layer glass, and the double-layer glass is used for amplifying the readings of the thermometer;

the cross section of float (20) is the quadrangle, be equipped with on the lateral wall of float (20) along blind pipe dodge groove (20 a) that the length direction of float (20) extends, the length that blind pipe dodge groove (20 a) is less than the axis length of float (20), the one end that blind pipe dodge groove (20 a) is located float (20) is close to on the terminal surface of pressure release valve (60), blind pipe (12) are located in blind pipe dodge groove (20 a), be equipped with inward flange (13) on the inner wall of the first end of oil pipe (10), have outward flange (21) on the lateral wall of float (20), outward flange (21) are located one side that is close to of inward flange (13) pressure release valve (60).

2. The oil level gauge according to claim 1, further comprising a rain cover (70), the rain cover (70) being covered outside the pressure relief valve (60).

3. The oil level gauge according to claim 1 or 2, characterized in that the connecting portion (11) includes a flange plate (111) and connecting bolts (112), a plurality of bolt holes are provided in the flange plate (111) along a circumferential direction thereof, and the connecting bolts (112) are provided in each of the bolt holes.

4. -oil level gauge according to claim 3, characterised in that the side of the flange plate (111) remote from the pressure relief valve (60) has an annular sealing groove in which a seal (80) is arranged.

5. The oil level gauge according to claim 1 or 2, characterized in that there is a gap between the float (20) and the inner wall of the oil pipe (10).

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

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