Transformer insulating oil monitoring device

Abstract

The utility model discloses a transformer insulating oil monitoring device, which belongs to the field of transformers, and comprises a transformer body, an oil supply tank fixedly arranged on the transformer body and communicated with the interior of the transformer body, and a monitoring structure arranged on the oil supply tank, the monitoring structure comprises a connecting pipe fixedly arranged at the bottom of one end of the oil supply tank and communicated with the interior of the oil supply tank, a piston arranged in the connecting pipe, a guide rod inserted into the oil supply tank and connected with the piston, and a vent hole formed in the top end of the connecting pipe. And an alarm mechanism is arranged on the connecting pipe. The piston and the guide rod are directly driven to move through the change of the liquid level of the insulating oil, the state of the insulating oil is monitored in real time, the monitoring timeliness and accuracy are improved, the structure is relatively simple, and manufacturing and maintenance are easy. Through the design of the alarm mechanism, intelligent monitoring of the liquid level of the insulating oil is realized, an alarm can be automatically given when the insulating oil is reduced to a rated value, and the timeliness and the accuracy of monitoring are improved.

Description

Technical Field

[0001] This application relates to the technical field of transformers, and specifically to a monitoring device for transformer insulating oil. Background Art

[0002] With the development of the power system, transformers, as key equipment in the power grid, their operating stability and safety have been increasingly emphasized. Transformer insulating oil, as an important medium for internal insulation and cooling of transformers, its state is directly related to the overall performance and lifespan of the transformer. However, in current monitoring practices of transformer insulating oil, the commonly adopted method is to install a transparent glass observation window on the insulating oil supply tank of the transformer, so as to visually check the position and changes of the oil.

[0003] Existing monitoring methods mainly rely on manual inspections. By regularly checking the position of the oil in the transparent glass observation window, the remaining amount and state of the insulating oil are judged. This method is simple and intuitive and can reflect the basic situation of the insulating oil to a certain extent. However, it is difficult to accurately judge whether the remaining amount of the insulating oil reaches the critical value only by visual observation, especially in the case of insufficient light or limited viewing angle, it is easier to produce errors. At the same time, when the insulating oil drops to the rated value, the existing device cannot automatically issue an alarm to remind the construction personnel to refuel in time. This may lead to excessive consumption of the insulating oil, affect the normal operation of the transformer, and even cause failures.

[0004] Therefore, this application provides a monitoring device for transformer insulating oil to solve the above problems. Utility Model Content

[0005] This application provides a monitoring device for transformer insulating oil, aiming to solve the problems in the background art that it is difficult to accurately judge whether the remaining amount of the insulating oil reaches the critical value only by visual observation, and at the same time, when the insulating oil drops to the rated value, the existing device cannot automatically issue an alarm to remind the construction personnel to refuel in time.

[0006] To achieve the above object, this application provides the following technical solution: A monitoring device for transformer insulating oil, including a transformer body, an oil supply tank fixedly arranged on the transformer body and communicating with the inside of the transformer body for introducing insulating oil, and a monitoring structure arranged on the oil supply tank for monitoring the insulating oil inside the oil supply tank;

[0007] Different from the existing transformer insulating oil monitoring devices: the monitoring structure includes a connecting pipe fixedly arranged at the bottom of one end of the oil supply tank and communicating with the inside of the oil supply tank, a piston arranged inside the connecting pipe, a guide rod inserted into the oil supply tank and connected to the piston, and a vent hole opened at the top end of the connecting pipe; when the liquid level of the insulating oil inside the transformer changes, the insulating oil will push or pull the piston inside the connecting pipe to move accordingly. During the upward movement of the piston, the gas located above the piston inside the connecting pipe is compressed and discharged through the vent hole; when the piston moves downward, the vent hole allows external air to enter the connecting pipe to supplement the compressed gas. The situation of the insulating oil inside the oil supply tank can be directly observed through the position change of the guide rod.

[0008] In order to give an alarm when the insulating oil inside the oil supply tank drops to the rated value: an alarm mechanism is arranged on the connecting pipe. The design of the alarm mechanism realizes the intelligent monitoring of the insulating oil liquid level, can automatically give an alarm when the insulating oil drops to the rated value, and improves the timeliness and accuracy of the monitoring.

[0009] Preferably, in order to improve the sealing performance between the piston and the connecting pipe: a sealing ring is arranged on the piston for sealing the gap between the piston and the connecting pipe. The design of the sealing ring significantly improves the sealing performance between the piston and the connecting pipe, and effectively prevents the leakage problem of the insulating oil during the monitoring process.

[0010] Preferably, the alarm mechanism includes a fixing plate fixedly sleeved on the top of the connecting pipe, an adjusting screw threadedly inserted on the fixing plate, a sensor fixedly installed at the top end of the adjusting screw, an alarm fixedly installed at the bottom end of the adjusting screw and connected to the sensor, and a positioning plate fixedly connected to the top end of the guide rod corresponding to the sensor. Through the height adjustment function of the adjusting screw, users can flexibly set the alarm threshold according to the different specifications of the transformer and the actual capacity of the insulating oil, enhancing the versatility and practicality of the monitoring device.

[0011] Preferably, in order to prevent the positioning plate from being misaligned with the sensor during the lifting and lowering of the guide rod: a guide rod is slidably inserted on the positioning plate, and the bottom end of the guide rod is fixedly connected to the top end of the fixing plate. The design of the guide rod significantly reduces the shaking and offset of the positioning plate during the lifting and lowering of the guide rod, thereby ensuring the accurate positioning of the sensor and improving the accuracy of measurement or detection.

[0012] Preferably, in order to prevent the sensor from being affected by foreign objects: a transparent cover is sleeved outside the alarm mechanism. The transparent cover effectively isolates the harmful substances such as dust, moisture, and corrosive gases in the external environment from eroding the sensor, extends the service life of the sensor, and improves the reliability of the monitoring device.

[0013] Preferably, in order to further facilitate the observation of the insulating oil inside the oil supply tank: scale numbers are provided on the transparent cover, and a pointer corresponding to the scale numbers is fixedly connected to the top end of the guide rod. Through the design of the scale numbers and the pointer, users can directly observe the real-time liquid level of the insulating oil inside the supply tank without complicated calculations or conversions, improving the intuitiveness and convenience of monitoring.

[0014] In this application, the movement of the piston and the guide rod is directly driven by the change of the insulating oil liquid level, realizing the real-time monitoring of the insulating oil state, improving the timeliness and accuracy of monitoring, with a relatively simple structure and being easy to manufacture and maintain. This direct measurement method avoids the possible errors and lags in traditional monitoring methods, improving the accuracy and timeliness of monitoring.

[0015] In this application, the intelligent monitoring of the insulating oil liquid level is realized through the design of the alarm mechanism, which can automatically send an alarm when the insulating oil drops to the rated value, improving the timeliness and accuracy of monitoring. Through the height adjustment function of the adjusting screw, users can flexibly set the alarm threshold according to the different specifications of the transformer and the actual capacity of the insulating oil, enhancing the versatility and practicality of the monitoring device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of a transformer insulating oil monitoring device;

[0017] Figure 2 is Figure 1 a partial structural sectional view of

[0018] Figure 3 It is a schematic structural diagram inside the transparent cover.

[0019] In the figure:

[0020] 1, transformer body; 2, supply tank; 3, monitoring structure; 31, connecting pipe; 32, piston; 321, sealing ring; 33, guide rod; 331, pointer; 34, vent hole; 4, alarm mechanism; 41, fixing plate; 42, adjusting screw; 43, sensor; 44, alarm; 45, positioning plate; 451, guide rod; 5, transparent cover; 51, scale numbers. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0022] This embodiment provides a monitoring device for transformer insulating oil, as Figures 1-3 shown. The monitoring device includes a transformer body 1, an oil supply tank 2 fixedly arranged on the transformer body 1 and communicating with the inside of the transformer body 1 for introducing insulating oil, and a monitoring structure 3 arranged on the oil supply tank 2 for monitoring the insulating oil inside the oil supply tank 2;

[0023] Different from the existing monitoring devices for transformer insulating oil: The monitoring structure 3 includes a connecting pipe 31 fixedly arranged at the bottom of one end of the oil supply tank 2 and communicating with the inside of the oil supply tank 2, a piston 32 arranged inside the connecting pipe 31, a guide rod 33 inserted on the oil supply tank 2 and connected to the piston 32, and a ventilation hole 34 opened at the top end of the connecting pipe 31; The movement of the piston 32 and the guide rod 33 is directly driven by the change in the insulating oil level. (When the piston 32 moves upward, the gas in the connecting pipe 31 above the piston 32 is discharged through the ventilation hole 34. When the piston 32 moves downward, the piston 32 replenishes air through the ventilation hole 34), realizing real-time monitoring of the state of the insulating oil, improving the timeliness and accuracy of monitoring, with a relatively simple structure, easy to manufacture and maintain. This direct measurement method avoids the possible errors and lags in traditional monitoring methods, improving the accuracy and timeliness of monitoring. The monitoring device can be applied to transformers of different specifications and models, and only needs to be appropriately adjusted according to the specific size and insulating oil capacity of the transformer. This wide applicability makes the device have broad application prospects in the power industry. When the liquid level of the insulating oil inside the transformer changes, the insulating oil will push or pull the piston 32 in the connecting pipe 31 to move accordingly. During the upward movement of the piston 32, the gas in the connecting pipe 31 above the piston 32 is compressed and discharged through the ventilation hole 34; when the piston 32 moves downward, the ventilation hole 34 allows external air to enter the connecting pipe 31 to supplement the compressed gas. The situation of the insulating oil inside the oil supply tank 2 can be directly observed through the position change of the guide rod 33.

[0024] Specifically, to improve the sealing performance between the piston 32 and the connecting pipe 31, a sealing ring 321 is provided on the piston 32 for sealing the gap between the piston 32 and the connecting pipe 31. The design of the sealing ring 321 significantly improves the sealing performance between the piston 32 and the connecting pipe 31, effectively preventing the leakage of insulating oil during the monitoring process. The sealing ring 321 is made of rubber or silica gel material with good elasticity and wear resistance to ensure good sealing effect during the frequent movement of the piston 32. The cross-sectional shape of the sealing ring 321 is usually circular or rectangular, and the specific shape is designed according to the inner wall shape of the connecting pipe 31 and the sealing requirements. During installation, the sealing ring 321 is compressed and closely fitted into the gap between the piston 32 and the connecting pipe 31 to form an effective sealing barrier. During the operation of the transformer insulating oil monitoring device, as the level of the insulating oil changes, the piston 32 moves up and down in the connecting pipe 31. At this time, the sealing ring 321, as the sealing element between the piston 32 and the connecting pipe 31, always closely fits into the gap between the two. No matter how the piston 32 moves, the sealing ring 321 can maintain its elasticity and sealing performance to prevent the insulating oil from leaking from the gap.

[0025] In order to give an alarm when the insulating oil in the supply oil tank 2 drops to the rated value, an alarm mechanism 4 is provided on the connecting pipe 31. The alarm mechanism 4 includes a fixing plate 41 fixedly sleeved on the top of the connecting pipe 31, an adjusting screw 42 threadedly inserted on the fixing plate 41, a sensor 43 fixedly installed at the top end of the adjusting screw 42, an alarm 44 fixedly installed at the bottom end of the adjusting screw 42 and connected to the sensor 43, and a positioning plate 45 fixedly connected to the top end of the guide rod 33 corresponding to the sensor 43. The design of the alarm mechanism 4 realizes the intelligent monitoring of the insulating oil level, can automatically give an alarm when the insulating oil drops to the rated value, and improves the timeliness and accuracy of the monitoring. Through the height adjustment function of the adjusting screw 42, users can flexibly set the alarm threshold according to the different specifications of the transformer and the actual capacity of the insulating oil, enhancing the versatility and practicality of the monitoring device. During the operation of the transformer, as the insulating oil is used and consumed, its level will gradually drop. When the level of the insulating oil drops to the preset rated value, the guide rod 33 will move downwards and drive the positioning plate 45 to move downwards. When the positioning plate 45 contacts the sensor 43, an electrical signal is generated. This electrical signal is processed and transmitted to the alarm 44 to trigger it to emit alarm signals such as sound and light. After receiving the alarm signal, the maintenance personnel can take timely measures to supplement the insulating oil or perform other necessary maintenance work to ensure the normal operation of the transformer.

[0026] Furthermore, in order to prevent the guide rod 33 from causing the positioning plate 45 and the sensor 43 to be misaligned during the lifting process: a guide rod 451 is slidably inserted on the positioning plate 45, and the bottom end of the guide rod 451 is fixedly connected to the top of the fixed plate 41. The design of the guide rod 451 significantly reduces the shaking and displacement of the positioning plate 45 during the lifting process of the guide rod 33, thereby ensuring the precise positioning of the sensor 43 and improving the accuracy of measurement or detection. The rigidity and stability of the entire structure are enhanced and the service life of the equipment is extended by the stable connection between the guide rod 451 and the positioning plate 45 and the fixed plate 41. When the guide rod 33 is lifted and lowered under the action of the piston 32, the positioning plate 45 moves up and down following the guide rod 33. Due to the existence of the guide rod 451, the movement of the positioning plate 45 is limited to the vertical direction.

[0027] Furthermore, in order to prevent the sensor 43 from being affected by foreign objects: a transparent cover 5 is provided on the outside of the alarm mechanism 4. The transparent cover 5 is made of high-strength, high-transmittance materials, such as transparent plastic, glass or acrylic plate, to ensure that while protecting the sensor 43, it does not hinder the maintenance personnel from observing and inspecting the internal state of the alarm mechanism 4. The transparent cover 5 effectively isolates the sensor 43 from being corroded by harmful substances such as dust, moisture, corrosive gases in the external environment, thereby extending the service life of the sensor 43 and improving the reliability of the monitoring device. As the external protective layer of the alarm mechanism 4, the transparent cover 5 works mainly on the principle of physical isolation. When harmful substances such as dust and moisture in the external environment try to approach the sensor 43, the transparent cover 5 will first block these substances to prevent them from directly contacting the surface of the sensor 43.

[0028] Furthermore, in order to further facilitate the observation of the insulating oil inside the oil supply tank 2: a scale number 51 is set on the transparent cover 5, and a pointer 331 corresponding to the scale number 51 is fixedly connected to the top of the guide rod 33. Through the design of the scale number 51 and the pointer 331, the user can directly observe the real-time liquid level of the insulating oil inside the oil supply tank 2 without complicated calculations or conversions, thereby improving the intuitiveness and convenience of monitoring. The user can understand the remaining amount of insulating oil at any time by checking the scale number 51 and the position of the pointer 331 on the transparent cover 5, without waiting for the alarm mechanism 4 to be triggered or performing other additional monitoring steps, thereby improving the efficiency and real-time nature of monitoring. During the operation of the transformer, as the insulating oil is used and consumed, its liquid level will change. This change will cause the guide rod 33 to move up and down in the connecting pipe 31. Since the pointer 331 is fixedly connected to the top of the guide rod 33, it will move synchronously with the rise and fall of the guide rod 33. When the user needs to know the remaining amount of insulating oil, he only needs to observe the scale number 51 and the position of the pointer 331 on the transparent cover 5.

[0029] As described above, it is only the preferred specific implementation manner of the present application. However, the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application should cover the protection scope of the present application by making equivalent substitutions or changes according to the technical solution and its concept of the present application.

Claims

1. A transformer insulating oil monitoring device, comprising a transformer body (1), an oil supply tank (2) fixedly arranged on the transformer body (1) and communicating with the inside of the transformer body (1) for introducing insulating oil, and a monitoring structure (3) arranged on the oil supply tank (2) for monitoring the insulating oil inside the oil supply tank (2); It is characterized in that: The monitoring structure (3) includes a connecting pipe (31) fixedly arranged at the bottom of one end of the oil supply tank (2) and communicating with the inside of the oil supply tank (2), a piston (32) arranged inside the connecting pipe (31), a guide rod (33) inserted into the oil supply tank (2) and connected to the piston (32), and a ventilation hole (34) opened at the top end of the connecting pipe (31); An alarm mechanism (4) is arranged on the connecting pipe (31).

2. The transformer insulating oil monitoring device according to claim 1, characterized in that: A sealing ring (321) for sealing the gap between the piston (32) and the connecting pipe (31) is arranged on the piston (32).

3. The transformer insulating oil monitoring device according to claim 1, characterized in that: The alarm mechanism (4) includes a fixing plate (41) fixedly sleeved on the top of the connecting pipe (31), an adjusting screw rod (42) threadedly inserted into the fixing plate (41), a sensor (43) fixedly installed at the top end of the adjusting screw rod (42), an alarm (44) fixedly installed at the bottom end of the adjusting screw rod (42) and connected to the sensor (43), and a positioning plate (45) fixedly connected to the top end of the guide rod (33) corresponding to the sensor (43).

4. The transformer insulating oil monitoring device according to claim 3, characterized in that: A guide rod (451) is slidably inserted into the positioning plate (45), and the bottom end of the guide rod (451) is fixedly connected to the top end of the fixing plate (41).

5. The transformer insulating oil monitoring device according to claim 1, characterized in that: A transparent cover (5) is sleeved outside the alarm mechanism (4).

6. The transformer insulating oil monitoring device according to claim 5, wherein: Scale numbers (51) are arranged on the transparent cover (5), and a pointer (331) corresponding to the scale numbers (51) is fixedly connected to the top end of the guide rod (33).

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