Oil-immersed transformer on-line monitoring sensing device with positioning structure

Abstract

The utility model relates to an oil-immersed transformer on-line monitoring sensing device with a positioning structure, the on-line monitoring sensing device comprises an intelligent fusion terminal and a multifunctional oil level gauge, the multifunctional oil level gauge comprises a gauge pipe, an oil level color code, an oil floater, a connecting pipe and an oil temperature sensor, the oil level color code is axially and slidably arranged in the meter tube and correspondingly arranged at the transparent window, the oil floater is located below the meter tube and connected to the oil level color code, the upper end and the lower end of the connecting tube are fixedly connected to the oil level color code and the oil floater respectively, the oil temperature sensor comprises a sensor body and a connecting rod, and the positioning structure comprises a positioning sleeve. The positioning sleeve is fixedly arranged on the lower portion of the meter tube, and the connecting tube is sleeved with the positioning sleeve in an axial sliding mode. The utility model aims to solve or at least alleviate the problem of single function of the existing oil level gauge, and provides the oil-immersed transformer on-line monitoring sensing device with the positioning structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil level gauges, and in particular relates to an online monitoring sensor device for an oil-immersed transformer with a positioning structure. Background Art

[0002] Oil level is one of the important monitoring parameters of power transformers. Monitoring the oil level of large oil-immersed transformers is a prerequisite for ensuring the safe operation of transformers. Timely detection of low or high oil levels and taking corresponding measures are of great significance to ensure the safe operation of power transformers.

[0003] Oil-immersed transformers use transformer oil as an insulating and cooling medium. In order to prevent safety problems caused by oil leakage, transformers are usually equipped with oil level gauges to monitor the oil level. The oil level gauge will sound an alarm when the oil level drops, reminding personnel to add transformer oil to ensure that electrical components continue to be well insulated and cooled.

[0004] However, the traditional oil level gauge can only perform a single measurement of the oil level, and the oil level can only be observed locally through the indicator window of the observation port, resulting in the transformer being unable to detect when it is short of oil, which can cause the transformer to overheat. At the same time, in order to monitor the oil temperature of the transformer, it is necessary to install a set of independent temperature measuring devices on the transformer to monitor the oil temperature, which not only increases the cost, but also takes up space in the transformer. Utility Model Content

[0005] The utility model aims to overcome the deficiencies in the prior art and provide an oil-immersed transformer online monitoring sensor device with a positioning structure.

[0006] The utility model is realized by the following technical solutions:

[0007] An online monitoring sensor device for an oil-immersed transformer with a positioning structure, the online monitoring sensor device comprising an intelligent fusion terminal and a multifunctional oil level gauge, the multifunctional oil level gauge comprising a gauge tube, an oil level color mark, an oil float, a connecting tube and an oil temperature sensor, the gauge tube being in the shape of a sealed circular tube with an opening at the lower end, the lower end of the gauge tube being mounted at the opening of a box cover of a fully sealed transformer, a transparent window being arranged in the middle of the gauge tube, the oil level color mark being axially slidably arranged in the gauge tube and being arranged correspondingly at the transparent window, the oil float being located below the gauge tube and being connected to the oil level color mark, the connecting tube being in the shape of a hollow straight tube, the upper and lower ends of the connecting tube being fixedly connected to the oil level color mark and the oil float respectively, the oil temperature sensor comprising a sensor body and a connecting rod, the connecting rod being fixedly arranged in the gauge tube and slidably sleeved in the connecting tube, the upper end of the connecting rod being located at the upper part of the gauge tube, the lower end extending downwardly out of the connecting tube and being provided with the sensor body;

[0008] The multifunctional oil level gauge also includes a positioning structure, which includes a positioning sleeve, the positioning sleeve is fixedly arranged at the lower part of the gauge tube, and the connecting tube is axially slidably sleeved in the positioning sleeve.

[0009] In order to further realize the utility model, the following technical solutions can be preferably selected:

[0010] Preferably, the meter tube comprises an upper sensor mounting section and a lower indicating section.

[0011] Preferably, the height value of the oil level color mark is not less than twice the height value of the transparent window, and the upper and lower parts of the oil level color mark are set to different colors.

[0012] Preferably, when the upper portion of the oil level color mark is located at the transparent window, the lower end of the oil level color mark abuts against the upper end of the positioning sleeve; when the lower portion of the oil level color mark is located at the transparent window, the upper end of the oil float abuts against the lower end of the meter tube.

[0013] Preferably, the multifunctional oil level gauge also includes a pressure relief valve, which includes a valve tube, a valve cover, a guide rod and a positioning plate. The lower end of the valve tube is fixedly sleeved on the upper end of the gauge tube, and the valve cover and the positioning plate are axially slidably arranged at the upper and lower ends of the valve tube respectively. The upper and lower ends of the guide rod are respectively fixedly connected to the valve cover and the positioning plate, and a spring is arranged between the valve cover and the positioning plate. The spring is slidably sleeved on the guide rod and its upper and lower ends respectively abut against the valve cover and the positioning plate.

[0014] Through the above technical solution, the beneficial effects of the utility model are:

[0015] The utility model controls the position of the oil level color mark by the oil float located in the transformer to realize the oil level monitoring function. At the same time, the utility model is also provided with an oil temperature sensor to achieve the effect of temperature monitoring and avoid overheating of the transformer due to failure to timely detect oil shortage.

[0016] The connecting rod of the oil level sensor of the utility model is sleeved in the connecting pipe, and the sensor body extends downward out of the connecting pipe and into the oil of the transformer, so the structure is reliable and the space occupied is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural sectional view of the utility model;

[0018] Figure 2 It is a schematic diagram of the structure of the utility model;

[0019] Figure 3 For the utility model Figure 1 Sectional view at AA in the middle;

[0020] Figure 4It is a schematic diagram of the assembly of the oil level color mark, oil float, connecting pipe and oil temperature sensor of the utility model;

[0021] Figure 5 It is a structural schematic diagram of the oil level color mark, oil float, connecting pipe and oil temperature sensor of the utility model;

[0022] Figure 6 It is a structural schematic diagram of the positioning sleeve of the utility model;

[0023] Figure 7 It is a structural cross-sectional view of the pressure relief valve of the utility model;

[0024] Among them: 1-meter tube; 2-oil level color mark; 3-oil float; 4-connecting tube; 5-oil temperature sensor; 6-positioning sleeve; 7-pressure release valve; 501-sensor body; 502-connecting rod; 701-valve tube; 702-valve cover; 703-guide rod; 704-positioning plate; 705-spring. DETAILED DESCRIPTION

[0025] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the following terms in the present invention can be understood according to specific circumstances.

[0026] The following will be combined with the drawings in the utility model embodiments to clearly and completely describe the technical solutions in the utility model embodiments. Obviously, the described embodiments are only part of the utility model embodiments, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Embodiment 1:

[0028] like Figure 1-Figure 7As shown, an online monitoring sensor device for an oil-immersed transformer with a positioning structure, the online monitoring sensor device includes an intelligent fusion terminal and a multifunctional oil level gauge, the multifunctional oil level gauge includes a meter tube 1, an oil level color mark 2, an oil float 3, a connecting tube 4 and an oil temperature sensor 5, the meter tube 1 is in the shape of a sealed circular tube with an opening at the lower end, the lower end of the meter tube 1 is installed at the opening of the box cover of the fully sealed transformer, a transparent window is arranged in the middle of the meter tube 1, the oil level color mark 2 is axially slidably arranged in the meter tube 1 and is correspondingly arranged at the transparent window, the oil float 3 is located below the meter tube 1 and is connected to the oil level color mark 2, the connecting tube 4 is in the shape of a hollow straight tube, the upper and lower ends of the connecting tube 4 are respectively fixedly connected to the oil level color mark 2 and the oil float 3, the oil temperature sensor 5 includes a sensor body 501 and a connecting rod 502, the connecting rod 502 is fixedly arranged in the meter tube 1 and slidably sleeved in the connecting tube 4, the upper end of the connecting rod 502 is located at the upper part of the meter tube 1, the lower end extends downwardly out of the connecting tube 4 and is provided with the sensor body 501;

[0029] In order to limit the oil level color mark 2 and facilitate more accurate oil level marking, the multifunctional oil level gauge also includes a positioning structure, which includes a positioning sleeve 6. The positioning sleeve 6 is fixedly arranged at the lower part of the meter tube 1, and the connecting tube 4 is axially slidably sleeved in the positioning sleeve 6.

[0030] The utility model is suitable for oil-immersed fully sealed transformers, and can monitor the oil level, oil temperature and internal pressure parameters of the transformer oil tank online in real time, and upload the collected data through RS485. The product can replace the traditional oil level gauge, oil surface thermometer and pressure relief valve 7 to realize the sensing function of online monitoring of the equipment. The sensor installation section on the upper part of the meter tube 1 is installed with a thick film pressure sensor, and the internal pressure parameters of the oil tank are monitored by the thick film pressure sensor. In this embodiment, the thick film pressure sensor adopts the joint measurement hard flat film pressure transmitter with the brand of sinomeasure and the model of SIN-P350.

[0031] As a lower computer, the utility model can be connected to the intelligent fusion terminal or other online monitoring devices to realize all the functions of online monitoring. When connected to the intelligent fusion terminal, the terminal is equipped with corresponding APP software.

[0032] The utility model controls the position of the oil level color mark 2 by the oil float 3 located in the transformer to realize the oil level monitoring function. At the same time, the utility model is also provided with an oil temperature sensor 5 to achieve the effect of temperature monitoring and avoid overheating of the transformer due to failure to timely detect oil shortage.

[0033] The connecting rod 502 of the oil level sensor of the utility model is sleeved in the connecting pipe 4, and the sensor body 501 extends downward out of the connecting pipe 4 and into the oil of the transformer, so the structure is reliable and the space occupied is small.

[0034] For ease of assembly, the meter tube 1 comprises an upper sensor mounting section and a lower indicator section.

[0035] In order to facilitate checking the oil level status, the height value of the oil level color mark 2 is not less than twice the height value of the transparent window, and the upper and lower parts of the oil level color mark 2 are set to different colors. In this embodiment, the upper and lower parts of the oil level color mark 2 are set to red and blue respectively.

[0036] When the upper part of the oil level color mark 2 is located at the transparent window, the lower end of the oil level color mark 2 abuts against the upper end of the positioning sleeve 6; when the lower part of the oil level color mark 2 is located at the transparent window, the upper end of the oil float 3 abuts against the lower end of the meter tube 1.

[0037] When the oil level in the transformer is high, the oil float 3 is located at a high position, and the lower part of the oil level color mark 2 is displayed in blue in the transparent window; when the oil level in the transformer is low, the oil float 3 is located at a low position, and the upper part of the oil level color mark 2 is displayed in red in the transparent window.

[0038] In order to prevent the pressure in the transformer from being too high, the multifunctional oil level gauge also includes a pressure relief valve 7, which includes a valve tube 701, a valve cover 702, a guide rod 703 and a positioning plate 704. The lower end of the valve tube 701 is fixedly sleeved on the upper end of the meter tube 1, and the valve cover 702 and the positioning plate 704 are axially slidably arranged at the upper and lower ends of the valve tube 701 respectively. The upper and lower ends of the guide rod 703 are fixedly connected to the valve cover 702 and the positioning plate 704 respectively. A spring 705 is arranged between the valve cover 702 and the positioning plate 704. The spring 705 is slidably sleeved on the guide rod 703 and its upper and lower ends respectively abut against the valve cover 702 and the positioning plate 704.

[0039] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An oil-immersed transformer online monitoring sensor device with a positioning structure, the online monitoring sensor device comprising an intelligent fusion terminal, characterized in that: The multifunctional oil level gauge comprises a meter tube (1), an oil level color mark (2), an oil float (3), a connecting tube (4) and an oil temperature sensor (5). The meter tube (1) is in the shape of a sealed circular tube with an opening at the lower end. The lower end of the meter tube (1) is mounted at the opening of the box cover of the fully sealed transformer. A transparent window is arranged in the middle of the meter tube (1). The oil level color mark (2) is axially slidably arranged in the meter tube (1) and is arranged correspondingly at the transparent window. The oil float (3) is located below the meter tube (1) and is connected to the transparent window. connected to the oil level color mark (2), the connecting tube (4) is in the shape of a hollow straight tube, the upper and lower ends of the connecting tube (4) are respectively fixedly connected to the oil level color mark (2) and the oil float (3), the oil temperature sensor (5) comprises a sensor body (501) and a connecting rod (502), the connecting rod (502) is fixedly arranged in the meter tube (1) and slidably sleeved in the connecting tube (4), the upper end of the connecting rod (502) is located at the upper part of the meter tube (1), and the lower end extends downwardly out of the connecting tube (4) and is provided with the sensor body (501); The multifunctional oil level gauge further comprises a positioning structure, wherein the positioning structure comprises a positioning sleeve (6), wherein the positioning sleeve (6) is fixedly arranged at the lower part of the gauge tube (1), and the connecting tube (4) is axially slidably sleeved in the positioning sleeve (6).

2. The oil-immersed transformer online monitoring sensor device with a positioning structure according to claim 1 is characterized in that: The meter tube (1) comprises an upper sensor mounting section and a lower indicating section.

3. The oil-immersed transformer online monitoring sensor device with a positioning structure according to claim 1 is characterized in that: The height value of the oil level color mark (2) is not less than twice the height value of the transparent window, and the upper and lower parts of the oil level color mark (2) are set to different colors.

4. The oil-immersed transformer online monitoring sensor device with a positioning structure according to claim 1 is characterized in that: When the upper portion of the oil level color mark (2) is located at the transparent window, the lower end of the oil level color mark (2) abuts against the upper end of the positioning sleeve (6); when the lower portion of the oil level color mark (2) is located at the transparent window, the upper end of the oil float (3) abuts against the lower end of the meter tube (1).

5. The oil-immersed transformer online monitoring sensor device with a positioning structure according to claim 1 is characterized in that: The multifunctional oil level gauge further comprises a pressure relief valve (7), the pressure relief valve (7) comprising a valve tube (701), a valve cover (702), a guide rod (703) and a positioning plate (704); the lower end of the valve tube (701) is fixedly sleeved on the upper end of the gauge tube (1); the valve cover (702) and the positioning plate (704) are axially slidably disposed on the upper and lower ends of the valve tube (701), the upper and lower ends of the guide rod (703) are respectively fixedly connected to the valve cover (702) and the positioning plate (704); a spring (705) is disposed between the valve cover (702) and the positioning plate (704); the spring (705) is slidably sleeved on the guide rod (703) and its upper and lower ends are respectively abutted against the valve cover (702) and the positioning plate (704).

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