Floating type conservator oil level indicator

Abstract

The invention relates to a floating type oil conservator oil level indicator which comprises two guide rods vertically arranged in an oil conservator, and the two guide rods are provided with a first floating body and a second floating body which can be vertically installed in a sliding mode respectively. The first buoy body is provided with a laser transmitter for transmitting a laser beam in the horizontal direction to the second buoy body; the second buoy body reflects the laser beam from the horizontal direction to a reflecting plate in the vertical direction, and a laser receiver used for receiving the laser beam in the vertical direction is arranged at the top of the oil conservator; when the first floating body and the second floating body are located at the same horizontal position, a laser beam emitted by the laser emitter is reflected to the laser receiver through the reflecting plate. The floating type oil level gauge of the oil conservator is reasonable in design, high in oil level detection accuracy, convenient to use and practical, oil level monitoring is achieved in a laser ranging mode, the oil level of transformer oil in the oil conservator can be measured more accurately, stability and reliability are achieved, and the influence of the installation height of the oil conservator is avoided.

Description

Technical Field

[0001] The present invention relates to the field of conservator oil level gauges, and particularly to a floating conservator oil level gauge. Background Art

[0002] The conservator oil level gauge is a measuring instrument dedicated to the transformer conservator. The oil level gauge can monitor the oil level in the transformer conservator in real time to ensure that the oil level remains within the normal range, which is crucial for the cooling and insulation of the transformer. The oil level gauge can display the change of the oil level, thus helping maintenance personnel to judge whether there is internal leakage or other faults, and taking timely measures to prevent damage to the internal components of the transformer caused by too low oil level. In summary, the use of the conservator oil level gauge is of great significance for ensuring the safe operation of the transformer, extending the equipment life, and reducing the maintenance cost.

[0003] In the prior art, the float type oil level gauges are all externally connected to pipelines on the side, and the principle of the communicating vessel is used to use the float to determine the oil level in the conservator. However, the external installation method is prone to inaccurate readings and false oil level problems, especially for transformers and conservators with too high installation positions. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a floating conservator oil level gauge with high oil level detection accuracy, convenient to use, stable and reliable.

[0005] The present invention is implemented as follows: A floating conservator oil level gauge includes two guide rods vertically arranged in the conservator. A first floating body and a second floating body that can be vertically slidably installed are respectively arranged on the two guide rods. A laser emitter for emitting a horizontal laser beam towards the second floating body is provided on the first floating body. A reflecting plate for reflecting the laser beam from the horizontal direction to the vertical direction is provided on the second floating body. A laser receiver for receiving the vertical laser beam is provided at the top of the conservator. When the first floating body and the second floating body are in the same horizontal position, the laser beam emitted by the laser emitter is reflected by the reflecting plate to the laser receiver.

[0006] Further, an assembly cavity is provided inside the first floating body, and the laser emitter is installed in the assembly cavity. An annular hollow groove is provided on the peripheral wall of the first floating body, and an isolation ring made of a light-transmitting material for the laser beam to penetrate through is rotatably installed in the annular hollow groove.

[0007] Further, a plurality of scraping ears distributed along the rotation path of the isolation ring are also spaced apart on the outer peripheral part of the first floating body. A magnetic coupling mechanism for driving the isolation ring to rotate is provided inside the conservator.

[0008] Further, the magnetic coupling mechanism includes a plurality of magnetic bodies evenly distributed inside the isolation ring. A rotatable cover is provided around the guide rod where the first floating body is located. A plurality of vertical hollow slots for the laser beam to pass through are spaced on the peripheral wall of the cover, and a plurality of permanent magnets cooperating with the magnetic bodies are installed on the inner wall of the cover.

[0009] Further, the interior of the first floating body has a central column located on the axis of the first floating body. The laser emitter is installed on the outer wall of the central column and is located on the radial line of the central column.

[0010] Further, a plurality of counterweights are installed on the outer wall of the central column. The laser emitter and the plurality of counterweights are evenly distributed in a circle on the outer wall of the central column, and the counterweights have the same shape and mass as the laser emitter.

[0011] Further, a transparent oil-repellent coating is provided on the outer wall of the isolation ring. A rubber strip is provided on the inner side of the scraping ear and is attached to the surface of the isolation ring. The rubber strip is in an arc structure surrounding the outer wall of the isolation ring.

[0012] Further, the cross-section of the guide rod is a rounded rectangle, and a ceramic coating is provided on the outer wall of the guide rod.

[0013] Further, the second floating body is of a hollow structure, and the interior of the second floating body is filled with high-pressure air.

[0014] Further, a light guide groove of an L-shaped structure is provided inside the second floating body. The reflector is arranged at the corner inside the light guide groove, and the reflector is arranged at an inclination of 45°.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The floating oil conservator oil level gauge of the present invention is reasonably designed, has high oil level detection accuracy, is convenient and practical, uses the method of laser ranging to monitor the oil level, can more accurately measure the oil level of the transformer oil inside the oil conservator, is stable and reliable, and is not affected by the installation height of the oil conservator.

[0016] In addition, the floating oil conservator oil level gauge of the present invention also has many other advantages, which will be further described in detail in combination with the following specific embodiments.

[0017] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below through specific embodiments and related drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic three-dimensional structure diagram of the oil conservator in the embodiment of the present invention; Figure 2 It is a right view of the oil conservator in the embodiment of the present invention; Figure 3 For Figure 2 the sectional view taken along line A-A in Figure 4 the three-dimensional structural schematic diagram of the conservator with the cover body omitted inside the embodiment of the present invention; Figure 5 the three-dimensional structural schematic diagram of the first floating body in the embodiment of the present invention; Figure 6 the front view of the first floating body in the embodiment of the present invention; Figure 7 For Figure 5 the sectional view taken along line B-B in Figure 8 the three-dimensional internal structural schematic diagram of the first floating body in the embodiment of the present invention; Figure 9 the three-dimensional structural schematic diagram of the cover body in the embodiment of the present invention; Figure 10 the laser beam path diagram and the enlarged schematic diagram of the light guide groove in the embodiment of the present invention.

[0019] In the figure: 1, conservator; 2, guide rod; 3, first floating body; 4, second floating body; 5, isolation ring; 6, scraping ear; 7, rubber strip; 8, laser emitter; 9, counterweight; 11, magnetic body; 12, cover body; 13, permanent magnet; 14, light guide groove; 15, reflector; 16, laser receiver. Detailed implementation manners

[0020] It should be noted that the following detailed description is exemplary and is intended to provide further illustration of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0021] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary implementation manners according to the present application. As used herein, unless otherwise clearly specified in the context, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0022] Such as Figures 1 to 10As shown in the figure, a floating conservator oil level gauge includes two guide rods 2 vertically arranged in the conservator 1. A first floating body 3 and a second floating body 4 that can be slidably installed vertically are respectively arranged on the two guide rods 2. A laser transmitter 8 that emits a laser beam L in the horizontal direction towards the second floating body 4 is provided on the first floating body 3. A reflector 15 that reflects the laser beam L from the horizontal direction to the vertical direction is provided on the second floating body 4. A laser receiver 16 for receiving the laser beam L in the vertical direction is provided at the top of the conservator 1. When the first floating body 3 and the second floating body 4 are in the same horizontal position, the laser beam L emitted by the laser transmitter 8 is reflected by the reflector 15 to the laser receiver 16.

[0023] In the prior art, especially when the conservator is at a relatively high position, when observing the position of the external floating ball, since it is not a horizontal straight-line observation, the readings obtained will be deviated and inaccurate, and there will be a false oil level visually. Secondly, the oil level gauge with a floating ball connecting rod will also have the problem of false oil level. The bending deformation of the floating ball connecting rod or the mismatch between the connecting rod after replacement and the indicating instrument may lead to inaccurate oil level indication. The floating ball connecting rod is generally an aluminum alloy hollow round tube. During installation and maintenance, the floating ball connecting rod is easily bent and deformed by force. On the same oil surface, the deformed connecting rod drives the rotating part to rotate at inconsistent angles, resulting in inaccurate oil level indication of the oil level gauge. However, the present invention uses the method of laser ranging to realize the monitoring of the oil level. Since the distance between the two guide rods 2 is determined, the laser path emitted by the laser transmitter 8 to the reflecting surface of the reflector 15 will not change. And the distance of the laser beam L from the reflector 15 to the laser receiver 16 is variable. Therefore, when the height position of the reflector 15 changes, the time for the laser receiver 16 to receive the laser beam L will also change. By determining the height of the first floating body 3 and the second floating body 4 through time, the oil level of the transformer oil inside the conservator 1 can be measured more accurately.

[0024] Normally, both the first floating body 3 and the second floating body 4 float on the liquid surface of the transformer oil. However, during the process of pumping the transformer oil in or out, or during the severe vibration of the transformer, problems may occur with the liquid surface of the transformer oil in the conservator. Therefore, in the present invention, when the first floating body 3 and the second floating body 4 are not in the same horizontal position, the reflector 15 cannot receive the laser beam L emitted by the laser transmitter 8. The vertical limit of the guide rods 2 on the first floating body 3 and the second floating body 4 makes it impossible to measure the height of the liquid surface when the liquid surface is unstable, which can avoid misjudgment by the staff due to inaccurate oil level indication when the liquid surface is unstable.

[0025] In addition, the reflector 15 has a certain receiving range, which is convenient for the vibration of the transformer within a relatively weak range not to interfere with the reflector 15 receiving the laser beam L, and the normal working range vibration of the transformer itself does not affect the operation of the laser beam L.

[0026] As a further preferred embodiment, an assembly cavity is provided inside the first float body 3, and the laser emitter 8 is installed in the assembly cavity. The peripheral wall of the first float body 3 is provided with an annular hollow groove, and an isolation ring 5 made of a light-transmitting material for the laser beam L to penetrate is rotatably installed in the annular hollow groove. When the isolation ring 5 rotates, the scraper ear 6 can be used to clean the transformer oil splashed onto its surface.

[0027] When the transformer oil is pumped in, pumped out or in other situations, if the laser emitter 8 is directly exposed in the oil pillow, the transformer oil will inevitably adhere to the surface of the laser emitter 8. In the present invention, by placing the laser emitter 8 inside and arranging the isolating ring 5 for separation at its periphery, the transformer oil will only adhere to the outer wall of the isolating ring 5 during sputtering or fluctuation, and by designing the scraping ears 6, when the isolating ring 5 rotates, the transformer oil on the isolating ring 5 is scraped off by the rubber strip 7 by the effect of relative rotation, ensuring that the laser beam L emitted by the laser emitter 8 will not be blocked by the transformer oil, so that the path of the laser beam L is unobstructed, and the isolating ring 5 can be made of glass.

[0028] As a further preferred embodiment, a plurality of scraping ears 6 distributed along the rotation path of the isolation ring 5 are arranged at intervals on the outer periphery of the first float body 3, and a magnetic coupling mechanism for driving the isolation ring 5 to rotate is arranged inside the oil pillow 1.

[0029] As a further preferred embodiment, the magnetic coupling mechanism includes a plurality of magnetic bodies 11 evenly distributed on the inner side of the isolation ring 5, a rotatable cover body 12 is provided on the periphery of the guide rod 2 where the first float body 3 is located, a plurality of vertical hollow grooves for the laser beam L to pass through are arranged at intervals on the peripheral wall of the cover body 12, and a plurality of permanent magnets 13 cooperating with the magnetic body 11 are installed on the inner wall of the cover body 12, and the permanent magnets 13 and the magnetic body 11 can be non-contact magnetically coupled. When the cover body 12 and the permanent magnet 13 rotate, their rotation axes coincide with the rotation axis of the isolation ring 5. At this time, the distances between the corresponding permanent magnets 13 and the magnetic body 11 in each group are the same, and a magnetic coupling is formed between the permanent magnets 13 and the magnetic body 11. At this time, the rotation of the cover body 12 can drive the isolation ring 5 to rotate, and the magnetic coupling between the permanent magnet 13 and the magnetic body 11 is permanent. Therefore, when the cover body 12 is not driven, the isolation ring 5 will also remain stationary to ensure the stability of the isolation ring 5. Secondly, the cover body 12 has a hollow design for the passage of the laser beam L, and the design can prevent it from blocking the laser beam L.

[0030] As a further preferred embodiment, the upper end of the cover body 12 is provided with a rotating shaft that passes through the top of the oil pillow and rotates with the oil pillow to drive the cover body 12 to rotate. The rotating shaft can be rotated to drive the cover body 12 to rotate.

[0031] As a further preferred embodiment, the interior of the first float body 3 has a central column which is located on the axis of the first float body 3. The laser emitter 8 is mounted on the outer wall of the central column and the laser emitter 8 is located on the radial line of the central column.

[0032] As a further preferred embodiment, a plurality of counterweights 9 are mounted on the outer wall of the central column. The laser emitter 8 and the plurality of counterweights 9 are circumferentially and evenly distributed on the outer wall of the central column. The counterweights 9 are identical in shape and mass to the laser emitter 8. By using the cooperation of the plurality of counterweights 9 and the laser emitter 8, the first float body 3 can be made centrosymmetric by itself, avoiding the change of its center of gravity due to asymmetry, enabling its center of gravity to be near the axis of the first float body 3, and improving the stability and smoothness of its floating.

[0033] As a further preferred embodiment, the outer wall of the isolation ring 5 is provided with a transparent oil-repellent coating. On the inner side of the scraping ear 6, there is a rubber strip 7 attached to the surface of the isolation ring. The rubber strip 7 is in an arc structure surrounding the outer wall of the isolation ring 5. The rubber strip 7 can reduce the damage to the oil-repellent coating, and at the same time, the rubber strip 7 can scrape the transformer oil on the outer wall of the isolation ring 5 more gently.

[0034] As a further preferred embodiment, the cross-section of the guide rod 2 is a rounded rectangle, and the outer wall of the guide rod 2 is provided with a ceramic coating. The rounded rectangle can provide vertical limitation for the first float body 3 and the second float body 4. Secondly, the rounded rectangle can increase its radian and reduce dry sliding. Thirdly, the ceramic coating can improve the smoothness of the guide rod 2, reduce the friction force, and improve the floating smoothness of the first float body 3 and the second float body 4.

[0035] As a further preferred embodiment, the second float body 4 is of a hollow structure, and the interior of the second float body 4 is filled with high-pressure air. The hollow design enables the second float body 4 to increase the load. Secondly, the high-pressure air can increase the buoyancy of the second float body 4, making it float more stably on the oil surface, which is particularly important for a floating ball that needs to maintain a stable position on the oil surface. Secondly, by adding high-pressure air inside the second float body 4, the internal and external pressures can be balanced, and the second float body 4 can withstand a higher pressure, thus ensuring the tolerance ability.

[0036] As a further preferred embodiment, a light guide groove 14 with an L-shaped structure is provided inside the second float body 4. The reflector 15 is disposed at the corner inside the light guide groove 14 and is inclined at 45°. The two ends of the light guide groove 14 are respectively an incident end and an exit end. The laser beam L enters the inside of the light guide groove 14 through the incident end and shoots towards the reflector 15. The reflected laser beam L vertically shoots upward through the exit end. The laser receiver 16 is located directly above the exit end. Both the incident end and the exit end penetrate through the outer wall of the second float body 4, and light-transmitting plates are designed at the ports of the incident end and the exit end.

[0037] For any of the technical solutions disclosed in the present invention as described above, unless otherwise stated, if it discloses a numerical range, the disclosed numerical range is a preferred numerical range. Any person skilled in the art should understand that the preferred numerical range is only the numerical values with obvious technical effects or representativeness among many feasible numerical values. Since there are too many numerical values to enumerate, the present invention only discloses some numerical values to illustrate the technical solutions of the present invention. Moreover, the above-listed numerical values should not constitute a limitation to the protection scope of the present invention.

[0038] If the present invention discloses or involves components or structural members that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connected by bolts or screws), or can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integral structure (for example, manufactured by an integral casting process) (except when it is obviously impossible to adopt the integral forming process).

[0039] In addition, for the terms used to represent the positional relationship or shape in any of the technical solutions disclosed in the present invention as described above, unless otherwise stated, their meanings include states or shapes that are approximate, similar, or close to them.

[0040] Any component provided by the present invention can either be assembled from multiple separate components or be a single component manufactured by an integral forming process.

[0041] The above is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical solution content of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A floating oil level gauge, characterized in that: It comprises two guide rods vertically arranged in the oil pillow, on which a first float and a second float which can be slidably installed vertically are respectively arranged; the first float is provided with a laser transmitter which emits a horizontal laser beam toward the second float; the second float is provided with a reflection plate which reflects the laser beam from the horizontal direction to the vertical direction, and a laser receiver which receives the vertical laser beam is provided on the top of the oil pillow; when the first float and the second float are in the same horizontal position, the laser beam emitted by the laser transmitter is reflected to the laser receiver via the reflection plate.

2. The floating oil conservator oil level gauge according to claim 1 is characterized in that: An assembly cavity is provided inside the first float body, and the laser emitter is installed in the assembly cavity. An annular hollow groove is provided on the peripheral wall of the first float body, and an isolation ring made of a light-transmitting material is rotatably installed in the annular hollow groove for the laser beam to penetrate.

3. The floating oil conservator oil level gauge according to claim 2 is characterized in that: The outer periphery of the first float body is also provided with a plurality of scraping ears distributed along the rotation path of the isolation ring at intervals, and a magnetic coupling mechanism for driving the isolation ring to rotate is provided inside the oil pillow.

4. The floating oil conservator oil level gauge according to claim 3 is characterized in that: The magnetic coupling mechanism includes a plurality of magnetic bodies evenly distributed on the inner side of an isolation ring, a rotatable cover body is provided on the periphery of the guide rod where the first float body is located, a plurality of vertical hollow grooves for the laser beam to pass through are arranged at intervals on the peripheral wall of the cover body, and a plurality of permanent magnets that cooperate with the magnetic bodies are installed on the inner wall of the cover body.

5. The floating conservator oil level gauge according to claim 2 is characterized in that: The first float body has a central column inside, and the central column is located on the axis of the first float body. The laser transmitter is installed on the outer wall of the central column, and the laser transmitter is located on the radial line of the central column.

6. The floating conservator oil level gauge according to claim 5, characterized in that: A plurality of counterweights are installed on the outer wall of the central column. The laser emitter and the plurality of counterweights are evenly distributed on the outer wall of the central column in a circumferential manner. The counterweight has the same shape and mass as the laser emitter.

7. The floating conservator oil level gauge according to claim 3 is characterized in that: The outer wall of the isolation ring is provided with a transparent oleophobic coating, and the inner side of the scraper ear is provided with a rubber strip attached to the surface of the isolation ring, and the rubber strip is in an arc-shaped structure surrounding the outer wall of the isolation ring.

8. The floating conservator oil level gauge according to claim 1 is characterized in that: The cross section of the guide rod is a rounded rectangle, and the outer wall of the guide rod is provided with a ceramic coating.

9. The floating conservator oil level gauge according to claim 1, characterized in that: The second float body is a hollow structure, and the interior of the second float body is filled with high-pressure air.

10. The floating oil conservator oil level gauge according to claim 1, characterized in that: An L-shaped light guide groove is provided inside the second float body, and the reflector is arranged at a corner inside the light guide groove, and the reflector is inclined at 45°.

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