Oil level display device, oil conservator and power transformer

Abstract

The utility model belongs to the technical field of transformers, and provides an oil level display device, an oil conservator and a power transformer. The oil level pipe is fixedly arranged on the oil conservator box body, the bottom end of the oil level pipe communicates with the oil storage cavity of the oil conservator box body through a first connecting pipe, and the top end of the oil level pipe communicates with the oil storage cavity of the oil conservator box body through a second connecting pipe; the floating block is arranged in the oil level pipe, is in sliding connection with the oil level pipe, and can move in the oil level pipe along the longitudinal direction along with the change of the oil level in the oil level pipe; the detection module is electrically connected with the display module and used for detecting the position of the floating block and transmitting detected position information of the floating block to the display module, and the display module calculates the corresponding oil level according to the received position information of the floating block and displays the oil level in a digital mode. The oil level display device, the oil conservator and the power transformer are simple in structure and reasonable in design, and the oil level of the oil conservator can be checked conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to an oil level display device, an oil pillow and a power transformer. Background Art

[0002] The transformer oil pillow is the outside of the transformer. When the volume of the transformer oil expands or decreases with the temperature of the oil, the oil pillow plays the role of regulating the oil amount to ensure that the transformer oil tank is always full of oil.

[0003] At present, the oil pillow in the prior art is to observe the oil level position in the oil pillow through a transparent oil level display arranged on the oil pillow box. However, the installation height of the transformer oil pillow is more than 10m, so it is difficult for the inspection personnel to observe the oil level in the oil pillow from below. Summary of the invention

[0004] In view of the defects in the prior art, the purpose of the utility model is to provide an oil level display device, an oil pillow and a power transformer, so as to facilitate the observation of the oil level in the oil pillow.

[0005] In order to achieve the above-mentioned object, in a first aspect, the utility model provides an oil level display device, which is arranged on an oil pillow box, comprising:

[0006] Display module;

[0007] An oil level pipe, which is fixedly arranged on the oil pillow box, with its bottom end connected to the oil storage cavity of the oil pillow box through a first connecting pipe, and its top end connected to the oil storage cavity of the oil pillow box through a second connecting pipe;

[0008] A float, which is arranged in the oil level pipe and is slidably connected to the oil level pipe, and can move longitudinally in the oil level pipe as the oil level in the oil level pipe changes;

[0009] The detection module is electrically connected to the display module and is used to detect the position of the float and transmit the detected position information of the float to the display module. The display module calculates the corresponding oil level according to the received position information of the float and displays it in digital form.

[0010] Furthermore, the detection module includes a distance measuring sensor, which is arranged at one end of the oil level pipe and fixedly connected to the oil pillow box, and is used to detect the distance between the distance measuring sensor and the floating block.

[0011] Furthermore, the distance measuring sensor is a laser distance measuring sensor, and the laser distance measuring sensor is arranged at the top end of the oil level pipe.

[0012] Furthermore, a reflective plate is provided on one side of the floating block facing the laser ranging sensor, and the reflective plate is used for.

[0013] Furthermore, the detection module includes a pull-wire displacement sensor, which is arranged on the top of the oil level pipe. The steel wire of the pull-wire displacement sensor extends into the oil level pipe and is fixedly connected to the float.

[0014] Furthermore, it also includes:

[0015] A fixing ring, which is coaxially arranged in the oil level pipe and fixedly connected to the oil level pipe, and two fixing rings are provided, and the two fixing rings are arranged in the oil level pipe in sequence and at intervals in the longitudinal direction; and

[0016] The two ends of the guide rod are respectively fixedly connected to the two fixing rings, and a plurality of guide rods are provided. The plurality of guide rods are arranged in sequence and spaced apart around the axis of the fixing ring. The floating block is sleeved on the plurality of guide rods and fixedly connected to the guide rods.

[0017] Furthermore, a plurality of guide rods are evenly arranged around the axis of the fixing ring.

[0018] Furthermore, it also includes:

[0019] a wireless transmitting module, which is disposed on the oil pillow housing and is electrically connected to the detection module; and

[0020] The wireless receiving module is electrically connected to the display module.

[0021] In a second aspect, the utility model provides an oil pillow, comprising any one of the oil level display devices described above.

[0022] In a third aspect, the utility model provides a power transformer, comprising the above-mentioned oil pillow.

[0023] Beneficial effects of the utility model:

[0024] The oil level display device, oil pillow and power transformer provided by the utility model have simple structure and reasonable design, and are convenient for inspection personnel to check the oil level of the oil pillow. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0026] Figure 1A three-dimensional view of an oil level display device provided by an embodiment of the utility model;

[0027] Figure 2 for Figure 1 A cross-sectional view of the oil level display device shown;

[0028] Figure 3 for Figure 2 An enlarged view of section A is shown;

[0029] Figure 4 A three-dimensional view of an oil level display device provided by another embodiment of the utility model;

[0030] Figure 5 for Figure 4 A cross-sectional view of the oil level display device shown;

[0031] Figure 6 for Figure 5 An enlarged view of section B is shown;

[0032] Figure 7 A three-dimensional view of an oil pillow provided by an embodiment of the utility model;

[0033] Figure 8 A three-dimensional view of an oil pillow provided in yet another embodiment of the present utility model.

[0034] Reference numerals:

[0035] 100. Oil pillow housing; 210. Display module; 220. Oil level tube; 230. Float; 241. Laser distance sensor; 242. Reflector; 250. Wire displacement sensor; 251. Steel wire; 261. Fixing ring; 262. Guide rod. DETAILED DESCRIPTION

[0036] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0037] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.

[0038] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0039] In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present utility model, the meaning of "plurality" is more than two, unless otherwise clearly and specifically limited.

[0040] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0041] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] In one embodiment, Figure 1-6 As shown, the utility model provides an oil level display device, which is arranged on an oil pillow box 100 and includes a display module 210, an oil level tube 220, a float 230 and a detection module.

[0043] The display module 210 includes a digital display, and the display module 210 is installed in a position that is convenient for the inspector to view. The oil level pipe 220 is fixedly arranged on the oil pillow case 100, and the bottom end of the oil level pipe 220 is connected to the oil storage cavity of the oil pillow case 100 through the first connecting pipe, so that the oil in the oil pillow case 100 can enter the oil level pipe 220 through the first connecting pipe, and the top end of the oil level pipe 220 is connected to the oil storage cavity of the oil pillow case 100 through the second connecting pipe to ensure that the air pressure at the top end of the oil level pipe 220 is equal to the air pressure in the oil pillow case 100, so that the oil level pipe 220 and the oil pillow case 100 form a communicating vessel structure, and then when the oil level in the oil storage cavity in the oil pillow case 100 changes, the oil level in the oil level pipe 220 will also change accordingly, and the oil level in the oil level pipe 220 is always consistent with the oil level in the oil pillow case 100.

[0044] The float 230 is installed in the oil level tube 220. The float 230 is slidably connected to the oil level tube 220. The float 230 can move longitudinally in the oil level tube 220 as the oil level in the oil level tube 220 changes, that is, the average density of the float 230 is less than the density of the oil. Specifically, the float 230 floats on the liquid surface of the oil in the oil level tube 220. When the oil level in the oil level tube 220 rises, the float 230 moves upward under the action of buoyancy; when the oil level in the oil level tube 220 drops, the float 230 moves downward under the action of gravity. The detection module is used to detect the position of the float 230, and the detection module is electrically connected to the display module 210.

[0045] The detection module is electrically connected to the display module 210, and is used to detect the position of the float 230 and transmit the detected position information of the float 230 to the display module 210. The display module 210 calculates the corresponding oil level according to the received position information of the float 230 and displays it in digital form.

[0046] During use, when the oil level in the oil pillow box 100 drops, the oil level in the oil level tube 220 also drops, and the float 230 drops with the oil level under the action of gravity; when the oil level in the oil pillow box 100 rises, the oil level in the oil level tube 220 also rises, and under the action of buoyancy, the float 230 also rises with the rise of the oil level. In this process, the position of the float 230 is detected by the detection module, and the oil level in the oil pillow box 100 can be calculated. The detection module transmits the detected position information of the float 230 to the display module 210, and the display module 210 calculates the corresponding oil level according to the received position information of the float 230 and displays it in digital form. When inspecting, the inspection personnel only need to check the display module 210 installed at a lower position.

[0047] In one embodiment, the detection module includes a distance sensor, which is disposed at one end of the oil level pipe 220 and fixedly connected to the oil pillow box 100. The distance sensor is used to detect the distance between it and the float 230.

[0048] Specifically, when the distance measuring sensor is arranged at the top end of the oil level tube 220, the oil level in the oil level tube 220 rises, and the float 230 rises accordingly under the action of the buoyancy, thereby reducing the distance between the float 230 and the distance measuring sensor; the oil level in the oil level tube 220 drops, and the float 230 drops accordingly under the action of its own gravity, thereby increasing the distance between the float 230 and the distance measuring sensor. In this way, the position of the float 230 can be obtained according to the distance between the float 230 and the distance measuring sensor, thereby calculating the corresponding oil level. Similarly, when the distance measuring sensor is arranged at the bottom end of the oil level tube 220, the oil level in the oil level tube 220 rises, and the float 230 rises accordingly under the action of the buoyancy, thereby increasing the distance between the float 230 and the distance measuring sensor; the oil level in the oil level tube 220 drops, and the float 230 drops accordingly under the action of its own gravity, thereby decreasing the distance between the float 230 and the distance measuring sensor. In this way, the position of the float 230 can be obtained according to the distance between the float 230 and the distance measuring sensor, thereby calculating the corresponding oil level.

[0049] Preferably, the distance measuring sensor is arranged at the top end of the oil level tube 220 so that the distance measuring sensor will not be affected by the oil in the oil level tube 220, thereby improving the measurement accuracy.

[0050] Preferably, the distance sensor is a laser distance sensor 241, and the laser distance sensor 241 is arranged at the top of the oil level pipe 220. Preferably, a reflector 242 is arranged on the side of the float 230 facing the laser distance sensor 241, and the reflector 242 is used to reflect the laser emitted by the laser distance sensor 241.

[0051] In one embodiment, the detection module includes a pull-wire displacement sensor 250 , which is fixedly mounted on the top of the oil level pipe 220 . The steel wire 251 of the pull-wire displacement sensor 250 extends into the oil level pipe 220 and is fixedly connected to the float 230 .

[0052] During use, when the oil level in the oil level tube 220 rises, the float 230 rises accordingly under the action of buoyancy, and the steel wire 251 of the wire displacement sensor 250 retracts. When the oil level in the oil level tube 220 drops, the float 230 rises accordingly under the action of its own gravity, and the steel wire 251 of the wire displacement sensor 250 extends. In this way, the position of the float 230 can be obtained according to the amount of extension of the steel wire 251 of the wire displacement sensor 250, thereby calculating the oil level in the oil pillow box 100.

[0053] In one embodiment, the oil level display device further includes a fixing ring 261 and a guide rod 262 .

[0054] The fixing ring 261 is coaxially disposed in the oil level tube 220 and fixedly connected to the oil level tube 220 . Two fixing rings 261 are provided, and the two fixing rings 261 are disposed in the oil level tube 220 in sequence and at intervals along the longitudinal direction.

[0055] Both ends of the guide rod 262 are fixedly connected to two fixing rings 261 respectively. A plurality of guide rods 262 are provided, and the plurality of guide rods 262 are sequentially spaced around the axis of the fixing ring 261. Preferably, the plurality of guide rods 262 are evenly arranged around the axis of the fixing ring 261. The floating block 230 is sleeved on the plurality of guide rods 262 and fixedly connected to the guide rods 262.

[0056] The oil level display device in this embodiment guides the movement of the float 230 by providing a guide rod 262 so that the float 230 can only move in the longitudinal direction, thereby achieving the purpose of improving the detection accuracy.

[0057] In one embodiment, the oil level display device further includes a wireless transmitting module and a wireless receiving module.

[0058] The wireless transmitting module is arranged on the oil pillow box 100, and the wireless transmitting module is electrically connected to the detection module. The wireless receiving module is electrically connected to the display module 210. Specifically, the wireless receiving module is installed on the digital display and is electrically connected to the digital display.

[0059] The oil level display device in this embodiment, by providing a wireless transmitting module and a wireless receiving module, eliminates the need for electrical connection between the detection module and the display module 210 using wires, thereby facilitating installation of the oil level display device.

[0060] In one embodiment, Figure 7-8 As shown, the utility model provides an oil pillow, which includes an oil pillow box 100 and the oil level display device provided by any of the above embodiments.

[0061] In one embodiment, the utility model provides a power transformer, comprising the oil pillow provided in any of the above embodiments.

[0062] In the specification of the present utility model, a lot of specific details are described. However, it is understood that the embodiments of the present utility model can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this specification.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. An oil level display device, which is arranged on an oil pillow box (100), It is characterized in that include: Display module (210); An oil level pipe (220) fixedly arranged on the oil pillow case (100), with its bottom end being connected to the oil storage chamber of the oil pillow case (100) via a first connecting pipe, and its top end being connected to the oil storage chamber of the oil pillow case (100) via a second connecting pipe; a floating block (230) disposed in the oil level pipe (220), slidably connected to the oil level pipe (220), and capable of moving longitudinally in the oil level pipe (220) as the oil level in the oil level pipe (220) changes; A detection module, which is electrically connected to the display module (210), is used to detect the position of the float (230) and transmit the detected position information of the float (230) to the display module (210); the display module (210) calculates the corresponding oil level according to the received position information of the float (230) and displays it in digital form.

2. The oil level display device according to claim 1, It is characterized in that The detection module comprises a distance measuring sensor, which is arranged at one end of the oil level pipe (220) and fixedly connected to the oil pillow box (100), and is used to detect the distance between the distance measuring sensor and the floating block (230).

3. The oil level display device according to claim 2, It is characterized in that The distance measuring sensor is a laser distance measuring sensor (241), and the laser distance measuring sensor (241) is arranged at the top end of the oil level pipe (220).

4. The oil level display device according to claim 3, It is characterized in that A reflective plate (242) is provided on one side of the floating block (230) facing the laser distance measuring sensor (241).

5. The oil level display device according to claim 1, It is characterized in that The detection module comprises a pull-wire displacement sensor (250), the pull-wire displacement sensor (250) being arranged at the top end of the oil level pipe (220), and the steel wire (251) of the pull-wire displacement sensor (250) extending into the oil level pipe (220) and fixedly connected to the float (230).

6. The oil level display device according to any one of claims 1 to 5, It is characterized in that Also includes: a fixing ring (261) coaxially disposed in the oil level pipe (220) and fixedly connected to the oil level pipe (220), two fixing rings (261) being disposed in the oil level pipe (220) at intervals in the longitudinal direction; and The guide rod (262) has two ends respectively fixedly connected to the two fixing rings (261), and a plurality of guide rods (262) are provided. The plurality of guide rods (262) are arranged in sequence at intervals around the axis of the fixing ring (261), and the floating block (230) is sleeved on the plurality of guide rods (262) and fixedly connected to the guide rods (262).

7. The oil level display device according to claim 6, It is characterized in that The plurality of guide rods (262) are evenly arranged around the axis of the fixing ring (261).

8. The oil level display device according to claim 1, 2, 3, 4, 5 or 7, It is characterized in that Also includes: a wireless transmission module, which is arranged on the oil pillow box (100) and is electrically connected to the detection module; and A wireless receiving module is electrically connected to the display module (210).

9. An oil pillow, It is characterized in that The oil level display device comprises the oil level display device according to any one of claims 1 to 8.

10. A power transformer, It is characterized in that Including the oil pillow described in claim 9.

Images