Digital intelligentized tank metering system

Abstract

The application discloses to the technical field of petroleum storage tank metering, in particular to a digital intelligent storage tank metering system, which comprises a PLC control terminal, which can drive a top cover device and a winding device, and can receive information of a detection device and other sensors, and is connected with an RTU concentrator; the RTU concentrator can optimize the bus wiring mode and improve the stability of the bus network, and is connected with the detection device, a TSD tank bottom display, the top cover device and the winding device; the TSD tank bottom display can display the detected data, can be connected with a pressure transmitter, and is arranged at the lower end of the outer wall of a storage device; the application can detect any area of the petroleum in the storage tank, realize multi-point position detection, make the conditions of each area of the petroleum known, and increase the detection accuracy.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of petroleum storage tank metering, in particular to a digital intelligent storage tank metering system. BACKGROUND

[0002] In the process of storing oil, the oil storage tank is an indispensable important storage tool, and the oil storage tank is a container for storing oil products and is the main facility of the oil depot. In pipeline transportation, it is the oil source interface of the oil pipeline.

[0003] In the oil storage tank, in order to ensure the quality and quantity of the stored oil, the liquid level and quality of the oil in the oil storage tank are detected. The existing oil in the oil storage tank is detected by using liquid level instruments and a plurality of other instruments or sensors for multiple detection of oil. However, since the oil in the oil storage tank is in a static state, the density will change with the sedimentation or decomposition of the oil, resulting in uneven distribution of the density. The temperature will be unevenly distributed under the influence of gravity and density. The existing fixed-point detection cannot accurately detect the quality of the oil. In addition, due to the imbalance of the placement of the oil storage tank or due to the large gravity of the oil, the bottom of the oil storage tank is concave, resulting in inaccurate liquid level of fixed-point detection and inability to determine how much oil is left in the oil storage tank. Therefore, we propose a digital intelligent storage tank metering system. SUMMARY

[0004] In view of the above and / or existing problems in a digital intelligent storage tank metering system, the present application is proposed.

[0005] Therefore, the purpose of the present application is to provide a digital intelligent storage tank metering system. By placing the detection device inside the winding device, controlling the detection position of the placement device by the top cover device, and releasing and recycling the placement device by the winding device, the above-mentioned problems can be solved.

[0006] To solve the above technical problems, according to one aspect of the present application, the present application provides the following technical scheme:

[0007] A digital intelligent storage tank metering system comprises a PLC control terminal, which can drive the top cover device and the winding device, and can receive information of the detection device and other sensors, and is connected with an RTU concentrator;

[0008] The RTU concentrator can optimize the bus wiring mode and improve the stability of the bus network, and is connected with the detection device, a TSD tank bottom display, the top cover device and the winding device;

[0009] The TSD tank bottom display can display the detected data and can be connected with a pressure transmitter, and is arranged at the lower end of the outer wall of the storage device;

[0010] The top cover device can be controlled by the PLC control terminal to rotate and adjust the placement position of the placement device, and the angle of rotation is transmitted to the PLC control terminal for display. The top cover device is detachably installed at the upper end of the storage device to seal the storage device.

[0011] The detection device can detect the oil quantity, density, stability, flow rate and real-time position of the oil in the storage device, and transmit the data to the PLC control terminal for display. The detection device is placed inside the placement device.

[0012] The winding device can place and recover the placement device, and transmit the placement and recovery position to the PLC control terminal for display. The winding device is arranged inside the top cover device.

[0013] As a preferred scheme of the digital intelligent tank metering system, the storage device comprises:

[0014] The tank can store oil and is placed on the ground.

[0015] The inlet can guide the oil into the inside of the tank and is arranged on the upper end of the outer wall of the tank.

[0016] The outlet can guide the oil out of the tank and is arranged on the lower end of the outer wall of the tank.

[0017] The limiting groove can limit the rotation of the rotating disc of the top cover device and is arranged on the upper end of the inner wall of the tank.

[0018] As a preferred scheme of the digital intelligent tank metering system, the top cover device comprises:

[0019] The cover plate can seal the oil in the tank and is detachably installed at the top end of the tank.

[0020] The rotating motor can rotate the placement device at the bottom of the rotating disc and adjust the position of the placement device. The rotating motor is arranged on the surface center of the cover plate.

[0021] The angle sensor can detect the angle of rotation of the rotating motor and transmit the angle information of rotation to the PLC control terminal for display. The angle sensor is connected to the outer wall of the output end of the rotating motor.

[0022] The rotating disc can place the placement device at the bottom and can be rotated and driven by the rotating motor. The surface center of the rotating disc is connected to the output end of the rotating motor.

[0023] The limiting block can limit the rotation of the rotating disc and is arranged on the outer wall of the rotating disc and rotatably connected to the inside of the limiting groove.

[0024] As a preferred scheme of the digital intelligent storage tank metering system, the placing device comprises:

[0025] The upper half body can be matched with the lower half body to place the detection device, and the top end is wound with a stainless steel wire connected to the winding device.

[0026] The placing groove can insert and position the detection device, and is arranged at the bottom of the upper half body.

[0027] The lower half body can be matched with the lower half body to place and position the detection device, and is connected with the upper half body.

[0028] The inner thread ring can connect the upper half body and the lower half body, the inner wall lower end is rotationally connected with the lower half body, and the inner wall upper end is threadedly connected with the lower end of the outer wall of the upper half body.

[0029] As a preferred scheme of the digital intelligent storage tank metering system, the upper half body comprises:

[0030] The through hole can cooperate with the side hole to discharge the oil inside the upper half body and the lower half body, and is arranged in two groups, the upper end of the through hole is arranged at the bottom of the upper half body, the lower end of the through hole is arranged at the bottom of the lower half body, and penetrates the lower half body.

[0031] The side hole can cooperate with the through hole to discharge the oil inside the upper half body and the lower half body, and is arranged at the outer wall of the upper half body.

[0032] As a preferred scheme of the digital intelligent storage tank metering system, the lower half body comprises:

[0033] The hollow groove can discharge the oil into the inside of the upper half body and the lower half body, and make the upper half body and the lower half body continuously dive in the oil, and is arranged at the outer wall of the lower half body.

[0034] As a preferred scheme of the digital intelligent storage tank metering system, the placing device is arranged in four groups, and the radius of the rotating disc is divided by the four groups of placing devices.

[0035] As a preferred scheme of the digital intelligent storage tank metering system, the detection device comprises:

[0036] The liquid level sensor can detect the liquid level of the oil inside the storage tank, and wirelessly transmit the oil data of the oil to the PLC control terminal and the TSD tank bottom display for display, and is placed inside the placing groove.

[0037] The density sensor can detect the density of the oil in the tank, and wirelessly transmit the oil quantity data of the oil to the PLC control terminal and the TSD tank bottom display for display, and is placed inside the placing groove.

[0038] The temperature sensor can detect the temperature of the oil in the tank, and wirelessly transmit the oil quantity data of the oil to the PLC control terminal and the TSD tank bottom display for display, and is placed inside the placing groove.

[0039] The flow rate sensor can detect the import and export rate of the oil in the tank, and wirelessly transmit the oil quantity data of the oil to the PLC control terminal and the TSD tank bottom display for display, and is placed inside the placing groove.

[0040] The GPS positioning device can detect the position of the placing device in real time, and wirelessly transmit the position information to the PLC control terminal for picture display, and is placed inside the placing groove at the bottom center of the upper half.

[0041] As a preferred scheme of the digital intelligent tank metering system, the winding device comprises:

[0042] The vertical plate can place the winding motor, and is arranged on the surface of the rotating disc;

[0043] The winding motor can rotate and drive the winding disc, and is arranged at the front end of the surface of the vertical plate;

[0044] The winding disc can wind and release the stainless steel wire through rotation, and is rotatably connected to the rear end of the vertical plate and connected to the output end of the winding motor;

[0045] The stainless steel wire can pull up and release the upper half and the lower half, and one end is wound inside the winding disc, and the other end is wound at the top end of the upper half.

[0046] As a preferred scheme of the digital intelligent tank metering system, the winding device further comprises:

[0047] The pulling rope sensor can detect the pulling up and releasing of the stainless steel wire, and transmit the displacement data of the stainless steel wire to the PLC control terminal for picture display, and the inner hub is wound with the stainless steel wire.

[0048] Compared with the prior art, the top cover device and the winding device can be driven by the PLC control terminal, and the information of the detection device and other sensors can be received, and the detection position of the placing device can be displayed in real time, so that the oil in the tank can be viewed by multi-point fixed-point detection.

[0049] The control terminal can be controlled by the top cover device, the placing position of the placing device is adjusted by rotation, and the rotation angle is transmitted to the PLC control terminal for picture display.

[0050] The detection device can be placed by the placing device, and the placing device is provided as four groups, the four groups of placing devices divide the radius of the rotating disc, so that the detection of any area of the oil in the storage tank can be realized under the driving of the rotating motor, the position detection of multiple points is realized, the condition of each area of the oil can be known, and the detection accuracy is improved.

[0051] The detection device can detect the oil quantity, density, stability, flow rate and real-time position of the oil in the storage device, and transmit the data to the PLC control terminal for picture display.

[0052] The placing device can be placed and recycled by the winding device, and the placing and recycling positions are transmitted to the PLC control terminal for picture display, so that the placing position of the placing device can be accurately monitored, and the detection state of the placing device is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0053] Figure 1 The system structure schematic diagram provided by the present application is provided;

[0054] Figure 2 The overall split structure schematic diagram provided by the present application is provided;

[0055] Figure 3 The storage device structure schematic diagram provided by the present application is provided;

[0056] Figure 4 The top cover device structure schematic diagram provided by the present application is provided;

[0057] Figure 5 The placing device structure schematic diagram provided by the present application is provided;

[0058] Figure 6 The placing device structure schematic diagram provided by the present application is provided;

[0059] Figure 7 The winding device structure schematic diagram provided by the present application is provided.

[0060] In the figure: PLC control terminal 1, storage device 2, storage tank 21, inlet 22, outlet 23, limiting groove 24, top cover device 3, cover plate 31, rotary motor 32, angle sensor 33, rotating disc 34, limiting block 35, placing device 4, upper half 41, placing groove 42, through hole 43, side hole 44, lower half 45, internal thread ring 46, hollow groove 47, detection device 5, liquid level sensor 51, density sensor 52, temperature sensor 53, flow rate sensor 54, GPS positioning device 55, winding device 6, vertical plate 61, winding motor 62, winding disc 63, stainless steel wire 64, pull cord sensor 65, RTU concentrator 7, TSD tank bottom display 8. DETAILED DESCRIPTION

[0061] To make the objects, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0062] The present application provides a digital intelligent storage tank metering system, which has the advantages that any area of the oil inside the storage tank 21 can be detected, thereby realizing multi-point position detection, the conditions of each area of the oil can be understood, and the detection accuracy is increased, please refer to Figures 1-7 , which comprises a PLC control terminal 1, a storage device 2, a top cover device 3, a placing device 4, a detection device 5, a winding device 6, an RTU concentrator 7 and a TSD tank bottom display 8.

[0063] The PLC control terminal 1 is connected to the RTU concentrator 7, the top cover device 3 and the winding device 6 can be driven through the PLC control terminal 1, the information of the detection device 5 and other sensors can be received, and the detection position of the placing device 4 can be displayed in real time, so that the multi-point fixed-point detection of the oil in the storage tank 21 can be viewed.

[0064] The storage device 2 is used for storing oil, the oil can be stored through the storage device 2, the storage device 2 comprises a storage tank 21, an inlet 22, an outlet 23 and a limiting groove 24, the storage tank 21 is placed on the ground and can store oil, the inlet 22 is arranged on the outer wall upper end of the storage tank 21 and can guide the oil into the inside of the storage tank 21, the outlet 23 is arranged on the outer wall lower end of the storage tank 21 and can guide the oil out of the storage tank 21, and the limiting groove 24 is arranged on the inner wall upper end of the storage tank 21 and can limit the rotation of the rotating disc 34 of the top cover device 3.

[0065] The top cover device 3 is detachably installed at the upper end of the storage device 2, seals the storage device 2, and through the top cover device 3, the control terminal 1 can be controlled by the PLC to rotate and adjust the placement position of the placement device 4, and the angle of rotation is transmitted to the PLC control terminal 1 for picture display. The top cover device 3 comprises a cover plate 31, a rotating motor 32, an angle sensor 33, a turntable 34 and a limiting block 35. The cover plate 31 is detachably installed at the top end of the storage tank 21, which can seal the petroleum in the storage tank 21. The rotating motor 32 is arranged at the surface center of the cover plate 31, which can rotate and adjust the position of the placement device 4 at the bottom of the turntable 34. The angle sensor 33 is connected to the outer wall of the output end of the rotating motor 32, which can detect the angle of rotation of the rotating motor 32 and transmit the angle information of the rotation to the PLC control terminal 1 for picture display. The turntable 34 is connected to the output end of the rotating motor 32 at the surface center, which can place the placement device 4 at the bottom and can be driven to rotate by the rotating motor 32. The limiting block 35 is arranged on the outer wall of the turntable 34 and is rotatably connected to the inside of the limiting groove 24, which can limit the rotation of the turntable 34.

[0066] The inside of the placing device 4 is placed with the detection device 5, which can be placed by the placing device 4, and is arranged as four groups by the placing device 4, which divides the radius of the rotating disc 34, so that under the drive of the rotating motor 32, any area of the oil in the storage tank 21 can be detected, so as to realize multi-point position detection, so that the condition of each area of the oil can be known, and the detection accuracy is increased. The placing device 4 includes an upper half body 41, a placing groove 42, a through hole 43, a side hole 44, a lower half body 45, an internal thread ring 46, and a hollow groove 47. The upper half body 41 is wound and connected with the stainless steel wire 64 of the winding device 6 at the top end, which can be matched with the lower half body 45 to place the detection device 5. The placing groove 42 is arranged around the bottom of the upper half body 41, which can be inserted into the detection device 5 and placed in position, and is arranged as five groups, which can place multiple devices. The lower half body 45 is connected with the upper half body 41, which can be matched with the lower half body 45 to place and limit the detection device 5. The inner wall of the internal thread ring 46 is rotationally connected with the lower half body 45 at the lower end, and the upper end of the inner wall is threadedly connected with the threads at the lower end of the outer wall of the upper half body 41, so that the upper half body 41 and the lower half body 45 can be connected, and the detection device 5 in the upper half body 41 and the lower half body 45 can be placed. The upper end through hole 43 is arranged around the bottom of the upper half body 41, and the lower end through hole 43 is arranged around the bottom of the lower half body 45 and penetrates the lower half body 45, which can be matched with the side hole 44 to discharge the oil in the upper half body 41 and the lower half body 45. The side hole 44 is arranged around the outer wall of the upper half body 41, which can be matched with the through hole 43 to discharge the oil in the upper half body 41 and the lower half body 45. The hollow groove 47 is arranged around the outer wall of the lower half body 45, which can discharge the oil into the inside of the upper half body 41 and the lower half body 45, and make the upper half body 41 and the lower half body 45 continuously dive in the oil. The oil is guided into the inside of the upper half body 41 and the lower half body 45 through the hollow groove 47, and is discharged from the inside of the upper half body 41 and the lower half body 45 through the cooperation of the through hole 43 and the side hole 44, so as to soak the oil, prevent the upper half body 41 and the lower half body 45 from diving due to buoyancy and oil viscosity, and make the upper half body 41 and the lower half body 45 dive stably in the oil, thereby increasing the detection accuracy;

[0067] The detection device 5 is placed inside the placing device 4, through the detection device 5, the oil quantity, density, stability, flow rate and real-time position of the oil inside the storage device 2 can be detected, and the data is transmitted to the PLC control terminal 1 for picture display, the detection device 5 includes a liquid level sensor 51, a density sensor 52, a temperature sensor 53, a flow rate sensor 54 and a GPS positioning device 55, the liquid level sensor 51 is placed inside the placing groove 42, which can detect the liquid level of the oil inside the storage tank 21, and the oil quantity data of the oil is wirelessly transmitted to the PLC control terminal 1 and the TSD tank bottom display 8 for display, the density sensor 52 is placed inside the placing groove 42, which can detect the density of the oil inside the storage tank 21, and the oil quantity data of the oil is wirelessly transmitted to the PLC control terminal 1 and the TSD tank bottom display 8 for display, the temperature sensor 53 is placed inside the placing groove 42, which can detect the temperature of the oil inside the storage tank 21, and the oil quantity data of the oil is wirelessly transmitted to the PLC control terminal 1 and the TSD tank bottom display 8 for display, the flow rate sensor 54 is placed inside the placing groove 42, which can detect the import and export rate of the oil inside the storage tank 21, and the oil quantity data of the oil is wirelessly transmitted to the PLC control terminal 1 and the TSD tank bottom display 8 for display, the GPS positioning device 55 is placed inside the placing groove 42 at the bottom center of the upper half 41, which can detect the position of the placing device 4 in real time, and the position information is wirelessly transmitted to the PLC control terminal 1 for picture display, and since the GPS positioning device 55 is placed at the bottom center of the upper half 41, it is surrounded by the liquid level sensor 51, the density sensor 52, the temperature sensor 53 and the flow rate sensor 54, so that the position display of the placing device 4 on the picture of the PLC control terminal 1 is more accurate;

[0068] Due to the liquid level sensor 51, the density sensor 52, the temperature sensor 53, the flow rate sensor 54 and the GPS positioning device 55, the transmission is carried out through the Silicon Labs Si4010 system on the chip of the microcontroller, the Silicon Labs Si4010 system is very suitable for only transmission, and promotes the bidirectional link, the RF analog kernel is combined with the core 8051 type microcontroller, including RAM, flash memory, EEPROM and Novram, when used for sensor interface, it can be used as a built-in hardware high-level encryption accelerator, which can encrypt and transmit the data of the sensor;

[0069] The winding device 6 is arranged inside the top cover device 3, the winding device 6 can put and recover the placing device 4, and the position of the placing device 4 is transmitted to the PLC control terminal 1 for picture display, so that the detection state of the placing device 4 is conveniently connected, the winding device 6 comprises a vertical plate 61, a winding motor 62, a winding disc 63, a stainless steel wire 64 and a pull rope sensor 65, the vertical plate 61 is arranged on the surface of the rotating disc 34, the winding motor 62 is arranged on the surface of the vertical plate 61, the winding disc 63 is rotatably connected to the rear end of the vertical plate 61 and is connected to the output end of the winding motor 62, the winding disc 63 can wind and unwind the stainless steel wire 64 through rotation, one end of the stainless steel wire 64 is wound in the winding disc 63, and the other end is wound on the top end of the upper half body 41, so as to control the placing device 4, the pull rope sensor 65 is arranged in the hub of the winding disc 63, the pull rope sensor 65 can detect the pulling and unwinding of the stainless steel wire 64, and the displacement data of the stainless steel wire 64 is transmitted to the wireless transmission PLC control terminal 1 for picture display, and the pull rope sensor 65 is improved, the outer wall of the stainless steel wire 64 is wound in the hub, the rotation of the hub makes the sensing element sense, and the material with increased friction is arranged on the surface of the hub, so that when the stainless steel wire 64 is pulled, the hub can rotate with the stainless steel wire 64, and the sensing of the sensing element is increased;

[0070] The RTU concentrator 7 is connected with the detection device 5, the TSD tank bottom display 25, the top cover device 3 and the winding device 6, the RTU concentrator 7 can optimize the bus wiring mode and improve the stability of the bus network, and has the functions of tank area signal and power supply lightning protection;

[0071] The TSD tank bottom display 8 is arranged on the lower end of the outer wall of the storage device 2, the TSD tank bottom display 8 can display the detected data, and can be connected with a pressure transmitter, and the TSD tank bottom display 8 is a TSD series tank bottom display, which is used for displaying liquid level information, average density and average temperature, and is convenient for oil depot site inspection.

[0072] In specific use, the person skilled in the art places the liquid level sensor 51, the density sensor 52, the temperature sensor 53, the flow rate sensor 54 and the GPS positioning device 55 inside the placement groove 42 of the upper half body 41, places the GPS positioning device 55 in the center placement groove, passes the lower half body 45 through the bottom end of the sensor, positions the sensor, rotates the inner threaded ring 46, connects the lower half body 4 with the upper half body 41, seals the cover plate 31, inserts the limiting block 35 of the outer wall of the rotating disc 34 into the inside of the limiting groove 24, guides the petroleum into the inside of the storage tank 21 through the inlet 22 for storage, guides the petroleum out through the outlet 23, starts the rotating motor 32 to detect the position of the placement device 4 through the PLC control terminal 1 when the petroleum needs to be detected, selects the placement device 4 of the position of the measurement area through the PLC control terminal 1, starts the winding motor 62 to drop the placement device 4 under the corresponding area, transmits the position information to the PLC control terminal 1 through the sensor, displays, operates the placement device 4 to dive into the area to be detected through the PLC control terminal 1, detects the petroleum volume, density, stability and flow rate through the detection sensor inside the placement device 4, and determines the state of the petroleum through multiple point detection, thereby achieving the detection of the petroleum in any area inside the storage tank 21, realizing the position detection of multiple points, making the condition of each area of the petroleum known, and increasing the detection accuracy.

[0073] Although the present application has been described with reference to the embodiments above, various modifications can be made to it without departing from the scope of the present application and equivalent components can be substituted therefor. In particular, each feature disclosed in the embodiments of the present application can be used in any combination with each other, provided that there is no structural conflict, and the combinations are not exhaustively described in the specification only for the purpose of omitting the length and saving resources. Therefore, the present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A digitally intelligent tank gauging system comprising: The PLC control terminal (1) can drive the top cover device (3) and the winding device (6), and can receive information of the detection device (5) and other sensors, and is connected with the RTU concentrator (7); the RTU concentrator (7) can optimize the bus wiring mode and improve the stability of the bus network, and is connected with the detection device (5), the TSD tank bottom display (25), the top cover device (3) and the winding device (6); the TSD tank bottom display (8) can display the detected data and can access the pressure transmitter, and is arranged at the lower end of the outer wall of the storage device (2); characterized in that: the top cover device (3) can be controlled by the PLC control terminal (1) to rotate and adjust the dropping position of the placing device (4), and transmit the rotation angle to the PLC control terminal (1) for picture display, and can be detachably installed at the upper end of the storage device (2) to seal the storage device (2); the detection device (5) can detect the oil quantity, density, stability, flow rate and real-time position of the oil in the storage device (2), and transmit the data to the PLC control terminal (1) for picture display, and is placed in the placing device (4); the winding device (6) can drop and recover the placing device (4), and transmit the dropping and recovering position to the PLC control terminal (1) for picture display, and is arranged in the top cover device (3); The storage device (2) comprises a storage tank (21) which can store oil and is placed on the ground; The top cover device (3) comprises a cover plate (31) which can seal the oil in the storage tank (21) and is detachably installed at the top end of the storage tank (21); a rotary motor (32) which can rotate the placing device (4) at the bottom of a rotating disc (34) and adjust the position of the placing device (4), and is arranged at the surface center of the cover plate (31); and the rotating disc (34) which can place the placing device (4) at the bottom and can be driven to rotate by the rotary motor (32), and the surface center is connected with the output end of the rotary motor (32). The placing device (4) comprises: an upper half body (41) which can cooperate with a lower half body (45), places the detection device (5), and the top end is wound with a stainless steel wire (64) connected with the winding device (6); the lower half body (45) which can cooperate with the lower half body (45), places and limits the detection device (5), and is connected with the upper half body (41); the through hole (43) which can cooperate with the side hole (44), discharges the oil inside the upper half body (41) and the lower half body (45), is provided as two groups, the upper end through hole (43) is arranged at the bottom of the four sides of the upper half body (41), the lower end through hole (43) is arranged at the bottom of the four sides of the lower half body (45), and penetrates the lower half body (45); the side hole (44) which can cooperate with the through hole (43), discharges the oil inside the upper half body (41) and the lower half body (45), and is arranged on the outer wall of the four sides of the upper half body (41); the hollow groove (47) which can discharge the oil into the inside of the upper half body (41) and the lower half body (45), and makes the upper half body (41) and the lower half body (45) continue to dive in the oil, and is arranged on the outer wall of the four sides of the lower half body (45); the placing device (4) is provided as four groups, and the radius of the rotating disc (34) is divided by the four groups of placing devices (4).

2. A digital smart tank gauging system as claimed in claim 1, wherein, The storage device (2) further comprises: the inlet (22) which can guide the oil into the inside of the storage tank (21), and is arranged on the outer wall of the upper end of the storage tank (21); the outlet (23) which can guide the oil out of the storage tank (21), and is arranged on the outer wall of the lower end of the storage tank (21); the limiting groove (24) which can limit the rotation of the rotating disc (34) of the top cover device (3), and is arranged on the inner wall of the upper end of the storage tank (21).

3. A digital smart tank gauging system as claimed in claim 1, wherein, The top cover device (3) further comprises: the angle sensor (33) which can detect the angle of the rotation of the rotating motor (32), and transmit the angle information of the rotation to the PLC control terminal (1) for picture display, and is connected with the outer wall of the output end of the rotating motor (32); the limiting block (35) which can limit the rotation of the rotating disc (34), and is arranged on the outer wall of the rotating disc (34), and is rotationally connected in the limiting groove (24).

4. A digital smart tank gauging system as claimed in claim 1, wherein, The placing device (4) further comprises: the placing groove (42) which can insert the detection device (5), and limit and place the detection device (5), and is arranged on the bottom of the four sides of the upper half body (41); the internal thread ring (46) which can connect the upper half body (41) and the lower half body (45), and rotationally connects the lower half body (45) at the lower end of the inner wall, and makes the upper end of the inner wall threadedly connect the thread of the lower end of the outer wall of the upper half body (41).

5. A digital smart tank gauging system as claimed in claim 1, wherein, The detection device (5) comprises: the liquid level sensor (51) which can detect the liquid level of the oil inside the storage tank (21), and wirelessly transmit the oil amount data of the oil to the PLC control terminal (1) and the TSD tank bottom display (8) for display, and is placed in the inside of the placing groove (42); The density sensor (52) can detect the density of the oil in the storage tank (21) and transmit the oil data wirelessly to the PLC control terminal (1) and the TSD tank bottom display (8) for display, and is placed inside the placement groove (42); The temperature sensor (53) can detect the temperature of the oil in the storage tank (21) and transmit the oil data wirelessly to the PLC control terminal (1) and the TSD tank bottom display (8) for display, and is placed inside the placement groove (42); The flow rate sensor (54) can detect the import and export rate of the oil in the storage tank (21) and transmit the oil data wirelessly to the PLC control terminal (1) and the TSD tank bottom display (8) for display, and is placed inside the placement groove (42); The GPS positioning device (55) can detect the position of the placement device (4) in real time and transmit the position information wirelessly to the PLC control terminal (1) for display, and is placed inside the placement groove (42) at the bottom center of the upper half (41).

6. A digital smart tank gauging system as claimed in claim 1, wherein, The winding device (6) comprises: The vertical plate (61) can place the winding motor (62) and is arranged on the surface of the turntable (34); The winding motor (62) can rotate and drive the winding disc (63) and is arranged at the front end of the surface of the vertical plate (61); The winding disc (63) can wind and release the stainless steel wire (64) by rotating, and is rotatably connected to the rear end of the vertical plate (61) and connected to the output end of the winding motor (62); The stainless steel wire (64) can pull up and release the upper half (41) and the lower half (45), and one end is wound inside the winding disc (63) and the other end is wound at the top end of the upper half (41).

7. A digital smart tank gauging system as claimed in claim 6, wherein, The winding device (6) further comprises: The pull rope sensor (65) can detect the pulling up and releasing of the stainless steel wire (64) and transmit the displacement data of the stainless steel wire (64) wirelessly to the PLC control terminal (1) for display, and the inner hub is wound with the stainless steel wire (64).

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