Oil tank liquid level monitoring system and monitoring method thereof

Abstract

The invention belongs to the technical field of oil tank measurement, and discloses an oil tank liquid level monitoring system and a monitoring method.The oil tank liquid level monitoring system comprises an oil tank, a driving part and at least two capacitive sensors, the capacitive sensors are arranged on the outer side face of the oil tank in a sliding mode in the vertical direction, and the driving part is in transmission connection with the capacitive sensors; and the capacitive sensor is driven to move along the vertical direction until the change of the liquid level of oil stored in the oil tank is sensed. According to the oil tank liquid level monitoring system, the capacitive sensor is driven by the driving piece to move in the vertical direction to detect the change of the liquid level in the oil tank so as to automatically detect the oil storage liquid level, and the accuracy and reliability of oil storage liquid level data collection are improved; the driving piece and the capacitive sensor are both arranged on the outer side of the oil tank, so that installation is convenient, later maintenance and replacement are facilitated, and time and labor are saved.

Description

Technical Field

[0001] The present invention relates to the technical field of oil tank measurement, and in particular to an oil tank liquid level monitoring system and a monitoring method thereof. Background Art

[0002] The normal oil level of the main transformer in the substation plays a vital role in the safe operation of the power grid. When the main transformer oil level is too high, it is easy to cause the main transformer to spray oil or pressure release action. When the main transformer oil level is too low, it is easy to cause gas protection action. When there is a serious lack of oil, it will cause the core winding to get damp and the insulation to break down. Therefore, it is very important to accurately judge the main transformer oil level and take corresponding measures.

[0003] At present, the oil level of the main transformer is usually judged by operators observing the oil level gauge of the oil tank. However, some oil level gauges that have been in operation for a long time have been exposed to the sun and rain, and the dials are seriously aged, or even blurred. It is impossible to accurately read the dial readings with the naked eye, which brings great inconvenience to operators in checking the main transformer oil level and affects the accuracy and reliability of the main transformer oil level monitoring. Summary of the invention

[0004] The object of the present invention is to provide an oil tank liquid level monitoring system and a monitoring method thereof, which have a simple structure and a capacitive sensor arranged outside the oil tank, so that monitoring is convenient and accurate.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] In a first aspect, an oil tank level monitoring system is provided, comprising an oil tank, a driving member and at least two capacitive sensors, wherein the capacitive sensors are slidably arranged on the outer side of the oil tank along a vertical direction, and the driving member is transmission-connected to the capacitive sensors to drive the capacitive sensors to move along the vertical direction until a change in the oil level in the oil tank is sensed.

[0007] As a preferred solution of the oil tank liquid level monitoring system, the oil tank liquid level monitoring system also includes a controller and an alarm, the driving member, the capacitive sensor, and the alarm are all electrically connected to the controller, the oil tank has an upper oil level and a lower oil level arranged at intervals along the vertical direction, the driving member drives the capacitive sensor to move along the vertical direction until the oil storage level is sensed, the controller controls the driving member to stop and analyzes the position information of the oil storage level, and when the oil storage level is higher than the upper oil level or lower than the lower oil level, the controller controls the alarm to function.

[0008] As a preferred solution of the oil tank liquid level monitoring system, the oil tank liquid level monitoring system further includes a liquid adding pipe, the liquid adding pipe is connected to the oil tank, one end of the liquid adding pipe away from the oil tank is used to connect to an external oil source, a first pump body and a first valve are arranged on the liquid adding pipe, and the first valve is adjacent to the oil tank, and the controller is electrically connected to the first pump body and the first valve respectively; and / or,

[0009] The oil tank level monitoring system also includes a drain pipe, which is connected to the bottom of the oil tank. A second pump body and a second valve are arranged on the drain pipe, and the second valve is adjacent to the oil tank. The controller is respectively connected to the second pump body and the second valve.

[0010] As a preferred solution of the oil tank liquid level monitoring system, the oil tank liquid level monitoring system also includes a guide rail and a slider, the guide rail is arranged on the outer side of the oil tank, the slider is slidably arranged on the guide rail, the capacitive sensor is arranged on the slider, and the slider is connected to the driving end of the driving member.

[0011] As a preferred solution of the oil tank liquid level monitoring system, the driving member includes a motor and a pull rope, the motor is arranged at the top of the oil tank, and the rotation axis of the output shaft of the motor extends along a first direction, the pull rope is connected to the slider, and one end of the pull rope away from the slider is at least partially wrapped around the output shaft of the motor, and the first direction is arranged perpendicular to the vertical direction.

[0012] As a preferred solution of the oil tank liquid level monitoring system, the driving member also includes a transmission roller, which is rotatably connected to the top of the oil tank, the transmission roller is connected to the output end of the motor, and the rotation axis of the transmission roller extends along the first direction, and at least one capacitive sensor is respectively arranged on both sides of the oil tank along the second direction, each of the capacitive sensors is correspondingly provided with one of the guide rails, one of the sliders and one of the pull ropes, and all of the pull ropes are connected to the transmission roller.

[0013] As a preferred solution of the oil tank liquid level monitoring system, the driving component also includes a gravity block, and the gravity block is connected to the sliding block via a connecting rope.

[0014] As a preferred solution of the oil tank liquid level monitoring system, the guide rail is a flexible guide rail, the outer side surface of the oil tank is a curved surface, and the flexible guide rail can be detachably attached to the curved surface.

[0015] As a preferred solution of the oil tank liquid level monitoring system, a limiting groove is provided on the outer side of the oil tank, and the guide rail is inserted into the limiting groove.

[0016] In a second aspect, a monitoring method of an oil tank liquid level monitoring system is provided, providing the above-mentioned oil tank liquid level monitoring system, comprising the following steps:

[0017] S10, using the capacitive sensor of the oil tank liquid level monitoring system to detect the inside of the oil tank of the oil tank liquid level monitoring system, and obtaining a detection result to determine whether there is liquid;

[0018] S20, when the detection result is that liquid exists, the driving component of the oil tank liquid level monitoring system drives the capacitive sensor to move upward in the vertical direction until the capacitive sensor detects that there is no liquid inside the oil tank and stops, and the stop position is the oil storage level in the oil tank;

[0019] When the detection result is that there is no liquid, the driving component of the oil tank liquid level monitoring system drives the capacitive sensor to move downward in the vertical direction until the capacitive sensor detects the presence of liquid inside the oil tank and stops. The stop position is the oil storage level in the oil tank.

[0020] The beneficial effects of the present invention are as follows: the drive component is used to drive the capacitive sensor to move in the vertical direction to detect the change of the liquid level in the oil tank to realize automatic detection of the oil storage level, thereby improving the accuracy and reliability of oil storage level data collection; by arranging the drive component and the capacitive sensor on the outside of the oil tank, it is not only convenient to install, but also easy to maintain and replace later, saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described in detail below based on the accompanying drawings and embodiments.

[0022] Figure 1 is a schematic structural diagram of an oil tank liquid level monitoring system according to an embodiment of the present invention;

[0023] Figure 2 is a schematic diagram of electrical control of an oil tank liquid level monitoring system according to an embodiment of the present invention;

[0024] In the figure:

[0025] 1. Oil tank; 2. Driving part; 21. Motor; 22. Pull rope; 23. Transmission roller; 3. Capacitive sensor; 4. Controller; 5. Alarm; 6. Filling pipe; 7. First pump body; 8. First valve; 9. Discharge pipe; 10. Second pump body; 11. Second valve; 12. Guide rail. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0027] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 the present invention can be understood according to specific circumstances.

[0028] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0029] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0030] like Figure 1 and Figure 2 As shown, the oil tank level monitoring system of an embodiment of the present invention includes an oil tank 1, a driving member 2 and at least two capacitive sensors 3. The capacitive sensors 3 are slidably arranged on the outer side of the oil tank 1 along the vertical direction (the vertical direction is the Z direction in the figure), and the driving member 2 is transmission-connected to the capacitive sensors 3 to drive the capacitive sensors 3 to move along the vertical direction until the change of the oil storage level in the oil tank 1 is sensed.

[0031] It can be understood that by utilizing the driving member 2 to drive the capacitive sensor 3 to move in the vertical direction to detect the change of the liquid level in the oil tank 1, the automatic detection of the oil storage level can be realized, thereby improving the accuracy and reliability of the oil storage level data collection; by arranging the driving member 2 and the capacitive sensor 3 on the outside of the oil tank 1, it is not only convenient to install, but also easy to carry out maintenance and replacement in the later stage, thus saving time and effort.

[0032] In this embodiment, taking the setting of two capacitive sensors 3 as an example, the two capacitive sensors 3 are arranged side by side along the first direction; when driven by two driving members 2, each driving member 2 drives the capacitive sensor 3 to stop when sensing the oil storage level, and compares the oil storage level values ​​measured by the two capacitive sensors 3, so as to take the lower oil storage level value, thereby avoiding the situation where a single capacitive sensor 3 detects that there is oil adhering to the inside of the oil tank 1 and there is a false oil level, and further improves the accuracy and reliability of oil storage level data collection. In addition, the two capacitive sensors 3 can also be set at the driving end of the same driving member 2. If the connection height of the two capacitive sensors 3 is consistent, when the driving member 2 drives the two capacitive sensors 3 to move simultaneously and synchronously sense the change of the oil storage level, then this point is the accurate oil storage level value. If one capacitive sensor senses the change of the oil storage level first, and continues to drive until the other capacitive sensor 3 senses the change of the oil storage level, then the lower value is the accurate oil storage level value. Of course, in other embodiments, three, four or even more capacitive sensors 3 may be used to improve the accuracy and reliability of oil storage level data collection.

[0033] Furthermore, the oil tank level monitoring system also includes a controller 4 and an alarm 5. The drive member 2, the capacitive sensor 3, and the alarm 5 are all electrically connected to the controller 4. The oil tank 1 has an upper oil level and a lower oil level spaced apart in the vertical direction. The drive member 2 drives the capacitive sensor 3 to move in the vertical direction until the oil storage level is sensed. The controller 4 controls the drive member 2 to stop and analyzes the position information of the oil storage level. When the oil storage level is higher than the upper oil level or lower than the lower oil level, the controller 4 controls the alarm 5 to function. By using the controller 4 to analyze the oil storage level to control the alarm 5 to function, when the oil storage level is higher than the upper oil level or lower than the lower oil level, the alarm 5 sends out an alarm to remind the operator to perform the corresponding operation, thereby improving the safety of the oil tank 1.

[0034] Furthermore, the oil tank level monitoring system further includes a liquid adding pipe 6, which is connected to the oil tank 1, and one end of the liquid adding pipe 6 away from the oil tank 1 is used to connect to an external oil source, and a first pump body 7 and a first valve 8 are provided on the liquid adding pipe 6, and the first valve 8 is adjacent to the oil tank 1, and the controller 4 is electrically connected to the first pump body 7 and the first valve 8 respectively. When the oil storage level detected by the capacitive sensor 3 is lower than the lower oil level and is fed back to the controller 4, the controller 4 controls the first valve 8 to open and starts the first pump body 7 to extract the external oil storage and add it to the oil tank 1, so as to ensure the oil storage amount in the oil tank 1, realize the automatic refueling of the oil tank 1, and reduce the workload of the operators.

[0035] In addition, the oil tank liquid level monitoring system also includes a drain pipe 9, which is connected to the bottom of the oil tank 1. A second pump body 10 and a second valve 11 are arranged on the drain pipe 9, and the second valve 11 is adjacent to the oil tank 1. The controller 4 is connected to the second pump body 10 and the second valve 11 respectively. When the oil storage level detected by the capacitive sensor 3 is higher than the upper oil level and is fed back to the controller 4, the controller 4 controls the second valve 11 to open and start the second pump body 10 to discharge the oil stored in the oil tank 1, so as to ensure that the oil storage in the oil tank 1 is between the upper oil level and the lower oil level. Of course, in order to improve the utilization rate of the stored oil and avoid the discharged stored oil from polluting the environment, the other end of the liquid outlet pipe away from the oil tank 1 can be connected to an external oil source.

[0036] In some embodiments, the oil tank liquid level monitoring system also includes a guide rail 12 and a slider. The guide rail 12 is arranged on the outer side of the oil tank 1, and the slider is slidably arranged on the guide rail 12. The capacitive sensor 3 is arranged on the slider, and the slider is connected to the driving end of the driving member 2. By utilizing the cooperation between the guide rail 12 and the slider, the capacitive sensor 3 can move smoothly along the length direction of the guide rail 12, thereby improving the movement guidance and stability of the capacitive sensor 3.

[0037] Optionally, the driving member 2 includes a motor 21 and a pull rope 22. The motor 21 is disposed on the top of the oil tank 1, and the rotation axis of the output shaft of the motor 21 extends along a first direction (the first direction is the X direction shown in the figure). The pull rope 22 is connected to the slider, and the end of the pull rope 22 away from the slider is at least partially wound around the output shaft of the motor 21. The first direction is perpendicular to the vertical direction. The motor 21 is controlled to rotate forward to wind the pull rope 22, thereby lifting the slider and the capacitive sensor 3 connected to the stretching. The motor 21 is controlled to rotate reversely to unwind the pull rope 22. At the same time, the slider and the capacitive sensor 3 slide down along the guide rail 12 due to the gravity of their own structure. The driving structure is simple and easy to install and use.

[0038] Preferably, the driving member 2 further includes a transmission roller 23, which is rotatably connected to the top of the oil tank 1, and is connected to the output end of the motor 21, and the rotation axis of the transmission roller 23 extends along the first direction. At least one capacitive sensor 3 is respectively provided on both sides of the oil tank 1 along the second direction (the second direction is the Y direction in the figure), and each capacitive sensor 3 is correspondingly provided with a guide rail 12, a slider and a pull rope 22, and all the pull ropes 22 are connected to the transmission roller 23. Through the arrangement of the transmission roller 23, the transmission roller 23 can be driven to rotate by a motor 21 to realize the synchronous winding or unwinding of multiple stretches, thereby reducing the investment of the motor 21, thereby reducing the occupied space of the structure and the investment of the cost.

[0039] Furthermore, the driving member 2 further comprises a gravity block, which is connected to the slider via a connecting rope. The gravity block is used to increase the weight of the slider, thereby preventing the slider from getting stuck due to lack of gravity when sliding down the guide rail 12, and improving the stability of the slider when sliding downward.

[0040] Furthermore, the guide rail 12 is a flexible guide rail 12, and the outer side surface of the oil tank 1 is a curved surface, and the flexible guide rail 12 can be detachably attached to the curved surface. The flexible guide rail 12 adopts a bendable structure made of plastic or other materials, and the flexible guide rail 12 is deformed to fit the outer side surface of the oil tank 1 by utilizing the bendability of the flexible guide rail 12. Therefore, the outer side surface of the oil tank 1 is not limited to a single plane as a flat straight surface, so the flexible guide rail 12 can be set when the outer side surface of the oil tank 1 is multi-sided with an angle setting, an arc surface, etc., which is convenient for disassembly and assembly and has strong adaptability, especially for cylindrical containers such as oil pillows. It has good versatility and has good market application prospects. In addition, the flexible guide rail 12 can be detachably connected to the outside of the oil tank 1 by gluing or bolting, and no specific examples are given here.

[0041] For example, the flexible guide rail 12 can be two fixed blocks spaced apart along the first direction, and mounting grooves are respectively provided on the adjacent sides of the two fixed blocks, and the length of the mounting grooves extends along the length direction of the fixed blocks. The slider is provided with two guide parts protruding on both sides along the first direction, and the two guide parts are respectively inserted into the mounting grooves on both sides. Furthermore, a plurality of balls are spaced apart on the groove wall of the mounting groove to reduce the sliding friction between the guide part and the mounting groove, so that the slider moves smoothly.

[0042] Preferably, a limiting groove is provided on the outer side of the oil tank 1, and the guide rail 12 is inserted into the limiting groove. By providing the limiting groove, the installation accuracy of the guide rail 12 can be enhanced, and the installation convenience of the guide rail 12 can be improved. In addition, the straightness of the flexible guide rail 12 can be ensured, and the matching accuracy of the flexible guide rail 12 and the slider can be ensured.

[0043] like Figure 1 and 2As shown, an embodiment of the present invention further provides a monitoring method of an oil tank liquid level monitoring system, providing the above-mentioned oil tank liquid level monitoring system, comprising the following steps:

[0044] S10, using the capacitive sensor 3 of the oil tank level monitoring system to detect the inside of the oil tank 1 of the oil tank level monitoring system, and obtaining a detection result to determine whether there is liquid;

[0045] S20, when the detection result is that liquid exists, the driving member 2 of the oil tank liquid level monitoring system drives the capacitive sensor 3 to move upward in the vertical direction until the capacitive sensor 3 detects that there is no liquid inside the oil tank 1 and stops, and the stop position is the oil storage liquid level in the oil tank 1;

[0046] When the detection result is that there is no liquid, the driving component 2 of the oil tank liquid level monitoring system drives the capacitive sensor 3 to move downward in the vertical direction until the capacitive sensor 3 detects that there is liquid inside the oil tank 1 and stops. The stop position is the oil storage level in the oil tank 1.

[0047] The monitoring method realizes automatic detection of the oil storage level by utilizing the driving member 2 to drive the capacitive sensor 3 to move in the vertical direction to detect the change of the liquid level in the oil tank 1. The operation is simple, time-saving and labor-saving, and the accuracy and reliability of oil storage level data collection are effectively improved.

[0048] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An oil tank level monitoring system, characterized in that: The invention comprises an oil tank, a driving member and at least two capacitive sensors, wherein the capacitive sensors are slidably arranged on the outer side of the oil tank along a vertical direction, and the driving member is transmission-connected with the capacitive sensors to drive the capacitive sensors to move along the vertical direction until the change of the oil storage level in the oil tank is sensed.

2. The oil tank level monitoring system according to claim 1, characterized in that: It also includes a controller and an alarm, the driving member, the capacitive sensor, and the alarm are all electrically connected to the controller, the oil tank has an upper oil level and a lower oil level arranged at intervals along the vertical direction, the driving member drives the capacitive sensor to move along the vertical direction until the oil storage level is sensed, the controller controls the driving member to stop and analyzes the position information of the oil storage level, and when the oil storage level is higher than the upper oil level or lower than the lower oil level, the controller controls the alarm to function.

3. The oil tank level monitoring system according to claim 2, characterized in that: It also includes a liquid adding pipe, the liquid adding pipe is connected to the oil tank, one end of the liquid adding pipe away from the oil tank is used to connect to an external oil source, a first pump body and a first valve are arranged on the liquid adding pipe, and the first valve is adjacent to the oil tank, and the controller is electrically connected to the first pump body and the first valve respectively; and / or, It also includes a drain pipe, which is connected to the bottom of the oil tank. A second pump body and a second valve are arranged on the drain pipe, and the second valve is adjacent to the oil tank. The controller is respectively connected to the second pump body and the second valve.

4. The oil tank level monitoring system according to any one of claims 1 to 3, characterized in that: It also includes a guide rail and a slider, wherein the guide rail is arranged on the outer side of the oil tank, the slider is slidably arranged on the guide rail, the capacitive sensor is arranged on the slider, and the slider is connected to the driving end of the driving member.

5. The oil tank level monitoring system according to claim 4, characterized in that: The driving member includes a motor and a pull rope. The motor is arranged on the top of the oil tank, and the rotation axis of the output shaft of the motor extends along a first direction. The pull rope is connected to the slider, and one end of the pull rope away from the slider is at least partially wrapped around the output shaft of the motor. The first direction is arranged perpendicular to the vertical direction.

6. The oil tank level monitoring system according to claim 5, characterized in that: The driving member also includes a transmission roller, which is rotatably connected to the top of the oil tank, the transmission roller is connected to the output end of the motor, and the rotation axis of the transmission roller extends along the first direction. At least one capacitive sensor is respectively arranged on both sides of the oil tank along the second direction, and each of the capacitive sensors is correspondingly provided with one of the guide rails, one of the sliders and one of the pull ropes, and all of the pull ropes are connected to the transmission roller.

7. The oil tank level monitoring system according to claim 6, characterized in that: The driving member also includes a gravity block, and the gravity block is connected to the sliding block through a connecting rope.

8. The oil tank level monitoring system according to claim 4, characterized in that: The guide rail is a flexible guide rail, the outer side surface of the oil tank is a curved surface, and the flexible guide rail is detachably attached to the curved surface.

9. The oil tank level monitoring system according to claim 4, characterized in that: A limiting groove is arranged on the outer side of the oil tank, and the guide rail is inserted into the limiting groove.

10. A monitoring method for an oil tank liquid level monitoring system, characterized in that: Provided is an oil tank level monitoring system according to any one of claims 1 to 9, comprising the following steps: S10, using the capacitive sensor of the oil tank liquid level monitoring system to detect the inside of the oil tank of the oil tank liquid level monitoring system, and obtaining a detection result to determine whether there is liquid; S20, when the detection result is that liquid exists, the driving component of the oil tank liquid level monitoring system drives the capacitive sensor to move upward in the vertical direction until the capacitive sensor detects that there is no liquid inside the oil tank and stops, and the stop position is the oil storage level in the oil tank; When the detection result is that there is no liquid, the driving component of the oil tank liquid level monitoring system drives the capacitive sensor to move downward in the vertical direction until the capacitive sensor detects that there is liquid inside the oil tank and stops. The stop position is the oil storage level in the oil tank.

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