Full liquid receiving floating disc device with oil layer thickness monitoring and oil receiving functions

Abstract

The invention relates to the field of floating trays, in particular to a full-liquid-receiving floating tray device with oil layer thickness monitoring and oil receiving functions. A full-liquid-receiving floating disc device with oil layer thickness monitoring and oil receiving functions comprises a tank body, a floating disc body, a steel cable and the like. The tank body is slidably connected with a floating disc body; the tank body is fixedly connected with two steel cables; the floating disc body is in sliding connection with all the steel cables. The ultrasonic transmitter and the ultrasonic receiver are arranged at the upper part of the monitoring cylinder immersed in the liquid, and the inverted monitoring cylinder forms a stable isolation air chamber, so that the monitoring unit is prevented from being polluted and corroded by floating oil, the long-term monitoring precision is guaranteed, and meanwhile, the monitoring efficiency is improved. The independent annular transfer cylinder and the oil suction pipe and the oil guide pipe which are communicated with the transfer cylinder are arranged around the monitoring cylinder, an oil receiving channel integrated in the manhole core is formed, the oil receiving process is limited in the transfer cylinder, disturbance to a main oil layer in a tank body is remarkably reduced, and stable and accurate synchronous monitoring on the thickness of the oil layer is achieved while continuous oil receiving is achieved.

Description

Technical Field

[0001] This invention relates to the field of floating roofs, and more particularly to a fully liquid-contact floating roof device with oil layer thickness monitoring and oil recovery functions. Background Technology

[0002] A floating roof, also known as a floating plate, is an environmentally friendly and energy-saving device commonly used in oil storage tanks. The working principle of a floating roof is to place it on the oil, and then the floating roof rises and falls with the oil level, always covering the oil surface. This effectively compresses the space above the oil, preventing the oil from evaporating from the tank. A fully contactable tank-type floating roof typically consists of several box-shaped floats, unlike traditional cylindrical floats. This allows the floats to have a relatively flat bottom surface, ensuring full contact with the oil and preventing any space between the floating roof and the oil from evaporating, thus improving the safety and stability of the floating roof.

[0003] In industries such as petrochemicals and wastewater treatment, floating roof tanks are often used to separate oil-water mixtures by sedimentation and to recover the upper layer of floating oil. However, existing technologies still have limitations in achieving online monitoring of floating oil thickness and automated oil recovery. For example, Chinese patent CN116654477A discloses an automated control device for oxygen-isolated oil recovery with floating oil thickness detection. This device directly exposes an ultrasonic probe to the oil layer environment for thickness measurement and is linked to an oil recovery pump. However, this method makes the probe susceptible to contamination by viscous floating oil, leading to decreased measurement accuracy and frequent maintenance. Furthermore, the oil recovery port is typically located directly in the oil layer below the floating plate. The suction process agitates the oil layer interface, causing surface fluctuations, which in turn severely interferes with the stability of the ultrasonic ranging signal, resulting in distorted monitoring data and making it difficult to achieve true synchronization between oil recovery and thickness measurement. In addition, the floating plate may tilt or rise and fall due to changes in liquid level during operation, potentially creating localized oil and gas spaces below it. If oil and gas seep into the monitoring unit or cause pressure changes, it will further affect the accuracy of monitoring and environmental safety. Therefore, there is an urgent need for a fully liquid-contact floating plate device that can isolate the monitoring unit from the oily environment, ensure that the oil recovery process and thickness monitoring do not interfere with each other, and maintain stable monitoring environmental pressure under dynamic operating conditions. Summary of the Invention

[0004] In order to overcome the shortcomings of existing floating roof devices, such as the monitoring unit being easily contaminated by floating oil and the oil recovery process stirring up the oil layer and interfering with the thickness measurement signal, as well as the fact that the rise and fall of the floating roof can easily create oil and gas space, affecting the monitoring accuracy and environmental safety, this invention provides a fully liquid-contact floating roof device with oil layer thickness monitoring and oil recovery functions.

[0005] The technical solution is as follows: A fully liquid-contact floating roof device with oil layer thickness monitoring and oil recovery functions, comprising a tank; a floating roof body slidably connected to the tank; two steel cables fixedly connected to the tank; the floating roof body slidably connected to all the steel cables; several floating boxes detachably connected to the floating roof body; a honeycomb design inside the floating boxes; a manhole core fixedly connected to each floating box; a manhole cover detachably connected to each manhole core; a monitoring cylinder fixedly connected to each manhole core; each manhole core penetrating the lower part of a floating box; the lower part of the monitoring cylinder being flush with the bottom of the manhole core; an oil layer thickness monitoring unit connected to the upper part of the monitoring cylinder; a transfer cylinder fixedly connected between the manhole core and the monitoring cylinder; several oil suction pipes connected to the lower part of the transfer cylinder; the upper part of the oil suction pipes being close to the inner top wall of the transfer cylinder; an oil guide pipe connected to the lower part of the transfer cylinder; the opening of the oil guide pipe being close to the inner bottom wall of the transfer cylinder.

[0006] Furthermore, the floating roof body consists of connecting beams and pontoons; the floating roof body is provided with connecting beams; several pontoons are fixed to the connecting beams; the connecting beams are connected to all the pontoons.

[0007] Furthermore, it also includes a water inlet pipe and an oil return pipe; the tank body is connected to the water inlet pipe; the tank body is fixedly connected to the oil return pipe; and the oil guide pipe is connected to the oil return pipe.

[0008] Furthermore, a hollow screw is installed on the floating roof body, through which steel cables pass, and a PTFE packing ring is installed above the screw.

[0009] Furthermore, each oil suction pipe is equipped with an oil level sensor at the bottom.

[0010] Furthermore, the oil layer thickness monitoring unit includes an ultrasonic transmitter and an ultrasonic receiver; the monitoring cylinder is a hollow cylinder with an open bottom; the upper part of the monitoring cylinder is higher than the bottom of the pontoon; the ultrasonic transmitter and ultrasonic receiver are installed on the upper part of the monitoring cylinder; both the ultrasonic transmitter and ultrasonic receiver are higher than the bottom of the pontoon.

[0011] Furthermore, it also includes a sampling stage and a sealing ball; the sampling stage is installed on the upper part of the monitoring tube; the sampling stage is connected to the monitoring tube; the sampling stage is funnel-shaped; a sealing ball is detachably connected to the sampling stage; the diameter of the sealing ball is larger than the diameter of the hole at the bottom of the sampling stage.

[0012] Furthermore, it also includes a partition and a U-shaped tube; a partition is fixed between the manhole core and the monitoring cylinder; an annular cavity is formed between the transfer cylinder and the partition; several U-shaped tubes connect the transfer cylinder and the annular cavity; and the upper part of the monitoring cylinder is connected to the annular cavity.

[0013] Furthermore, all the U-shaped tubes penetrate the partition.

[0014] Furthermore, it also includes a ventilation pipe and an absorption cylinder; the partition connects two ventilation pipes; each ventilation pipe is detachably connected to an absorption cylinder; the absorption cylinder has an absorption chamber; each absorption chamber is connected to an adjacent ventilation pipe; each absorption cylinder has several air vents on its upper side wall; each air vent is equipped with a filter screen.

[0015] The beneficial effects are as follows: 1. By placing the ultrasonic transmitter and ultrasonic receiver on the upper part of the monitoring cylinder immersed in the liquid, the inverted monitoring cylinder forms a stable isolation chamber, which protects the monitoring unit from floating oil pollution and corrosion, ensuring long-term monitoring accuracy. At the same time, an independent annular transfer cylinder and an oil suction pipe and oil guide pipe connected to it are set around the monitoring cylinder, forming an oil collection channel integrated inside the manhole core. The oil collection process is confined within the transfer cylinder, which significantly reduces the disturbance to the main oil layer in the tank and realizes stable and accurate synchronous monitoring of the oil layer thickness while continuously collecting oil.

[0016] 2. By setting up baffles, U-shaped tubes, ventilation pipes, and absorption cylinders, the U-shaped tubes connect the transfer cylinder and the annular cavity, creating a constant air pressure environment. The internal air chamber of the monitoring cylinder is connected to the absorption cylinder containing activated carbon via the annular cavity and ventilation pipes. Ultimately, this, along with the manhole core and the atmospheric environment of the tank, discharges any additional oil and gas generated by the floating oil layer. This allows the pressure inside and outside the monitoring cylinder to automatically balance when the floating plate operates or the oil layer changes, preventing inaccurate liquid level measurements due to pressure fluctuations. Simultaneously, trace amounts of oil and gas are purified and discharged by the absorption cylinder, providing a clean and stable gaseous environment for ultrasonic monitoring, fundamentally improving the reliability and data accuracy of the monitoring system under complex operating conditions. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the fully liquid-contacting floating roof device with oil layer thickness monitoring and oil recovery functions according to the present invention. Figure 2 This is a schematic diagram of the internal structure of the tank of the present invention; Figure 3 This is a three-dimensional structural diagram of the floating disk body of the present invention; Figure 4 This is a three-dimensional structural diagram of the pontoon of the present invention; Figure 5 This is a partial cross-sectional view of the pontoon and manhole core of the present invention; Figure 6 This is a schematic diagram of the internal structure of the manhole core of the present invention; Figure 7 For the present invention Figure 6 A magnified view of point X in the middle.

[0018] Reference numerals: 1-Tank body, 2-Water inlet pipe, 3-Oil receiving pipe, 4-Float body, 5-Steel cable, 6-Float box, 7-Manhole core, 8-Manhole cover, 9-Monitoring cylinder, 10-Transfer cylinder, 11-Oil suction pipe, 12-Oil guide pipe, 13-Baffle plate, 14-U-shaped pipe, 15-Ventilation pipe, 16-Absorption cylinder, 401-Connecting beam, 402-Float, 901-Ultrasonic transmitter, 902-Ultrasonic receiver, 903-Sampling platform, 904-Sealing ball, 1601-Absorption chamber, 1602-Filter screen. Detailed Implementation

[0019] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0020] First embodiment: A fully liquid-contact floating roof device with oil layer thickness monitoring and oil recovery functions, according to... Figures 1-7 As shown, it includes a tank body 1, a floating roof body 4, and steel cables 5; the floating roof body 4 is slidably connected to the tank body 1; two symmetrically distributed steel cables 5 are fixed to the tank body 1; the floating roof body 4 is slidably connected to all the steel cables 5. It also includes pontoons 6, manhole cores 7, manhole covers 8, monitoring cylinders 9, transfer cylinders 10, oil suction pipes 11, oil guide pipes 12, and oil layer thickness monitoring units; the floating roof body 4 is detachably connected to several pontoons 6; the pontoons 6 adopt a honeycomb design to evenly distribute buoyancy; each pontoon 6 has a manhole core 7 fixedly connected inside; each manhole core 7 has a detachably connected manhole cover 8; each manhole core 7 has a monitoring cylinder 9 fixedly connected inside; each manhole core 7 penetrates the lower part of a pontoon 6, so that the manhole core 7... The manhole is submerged below the liquid surface to prevent the formation of an oil and gas space below the manhole. The lower part of the monitoring cylinder 9 is flush with the bottom of the manhole core 7. An oil layer thickness monitoring unit is connected to the upper part of the monitoring cylinder 9. An annular transfer cylinder 10 is fixed between the manhole core 7 and the monitoring cylinder 9. Several oil suction pipes 11 are connected to the lower part of the transfer cylinder 10. The upper part of the oil suction pipes 11 is close to the inner top wall of the transfer cylinder 10. An oil guide pipe 12 is connected to the lower part of the transfer cylinder 10. The oil guide pipe 12 and all the oil suction pipes 11 are arranged in a ring array. The opening of the oil guide pipe 12 is close to the inner bottom wall of the transfer cylinder 10.

[0021] The floating roof body 4 is composed of a connecting beam 401 and pontoons 402; the floating roof body 4 is provided with a connecting beam 401; several pontoons 402 are fixedly connected to the connecting beam 401; the connecting beam 401 is connected to all the floating boxes 6.

[0022] It also includes a water inlet pipe 2 and an oil collection pipe 3; the tank body 1 is connected to the water inlet pipe 2; the tank body 1 is fixedly connected to the oil collection pipe 3; the oil guide pipe 12 is connected to the oil collection pipe 3 through a flexible hose.

[0023] A hollow screw is installed on the floating roof body 4, and a steel cable 5 passes through the hollow screw. A PTFE packing ring is installed above the screw to seal the hollow screw and prevent oil and gas leakage.

[0024] Each oil suction pipe 11 is equipped with an oil level sensor at its bottom for monitoring the oil-water interface.

[0025] The oil layer thickness monitoring unit includes an ultrasonic transmitter 901 and an ultrasonic receiver 902; the monitoring cylinder 9 is a hollow cylinder with an open bottom; the monitoring cylinder 9 is inverted on the liquid surface; the upper part of the monitoring cylinder 9 is higher than the bottom of the float box 6; the ultrasonic transmitter 901 and ultrasonic receiver 902 are installed on the upper part of the monitoring cylinder 9; both the ultrasonic transmitter 901 and ultrasonic receiver 902 are higher than the bottom of the float box 6 to avoid the floating oil from corroding the ultrasonic transmitter 901 and ultrasonic receiver 902.

[0026] Before using this floating roof, wastewater from the oil well is first injected into tank 1 through inlet pipe 2. Due to the density difference between oil and water, after standing for a period of time, the oil and water separate into layers, with the oil layer on top. The floating roof floats on the oil layer, with the floating roof body 4 in full contact with the oil layer, thus isolating the floating oil from the atmosphere. Then, the floating oil is pumped away through the oil collection pipe 3 by the oil collection device on the float box 6, thus realizing the recovery of the floating oil. As the floating oil is pumped away, the liquid level of the floating oil drops, and the floating roof body 4 also drops along with the liquid level of the floating oil. However, in the existing technology, the floating roof is not sufficiently limited, so during the process of the oil layer descending, the friction between the floating roof and the inner wall of tank 1 changes the immersion depth of the floating roof, resulting in uneven stress on the floating roof, causing deformation of the floating roof, and consequently causing the floating oil to... Gaps exist between the floating roofs, allowing floating oil to evaporate. The oil vapors from the evaporated oil accumulate in these gaps, reducing the sealing performance of the floating roofs and posing a serious safety hazard. However, by redesigning the structure of the pontoon 6 to a honeycomb structure, higher strength and stability are achieved. This structure can evenly distribute stress, providing uniform buoyancy. Together with the pontoon 402, it effectively supports the weight of the floating roof. Two symmetrically distributed steel cables 5 move along the floating roof body 4 during descent, effectively preventing rotation of the floating roof body 4 during movement due to uneven stress. Furthermore, PTFE packing rings are used at the connection points between the floating roof body 4 and the steel cables 5 to seal the joints, effectively preventing oil and gas leakage and improving the safety and reliability of the floating roof.

[0027] When oil and water separate in tank 1, the oil layer thickness monitoring unit monitors the thickness of the floating oil layer in real time and recovers the floating oil. The ultrasonic transmitter 901 and ultrasonic receiver 902 are activated. The sound waves emitted by the ultrasonic transmitter 901 are partially reflected after reaching the surface of the floating oil. The reflected sound waves are received by the ultrasonic receiver 902, thus obtaining time T1. Part of the sound waves emitted by the ultrasonic transmitter 901 pass through the floating oil layer and come into contact with the water layer. The water layer also reflects the ultrasonic waves, which are then received by the ultrasonic receiver 902, thus obtaining time T1. T2, the time difference obtained by T2-T1, is multiplied by the propagation speed of the sound wave in the oil layer to obtain the distance the sound wave travels in one round trip in the floating oil layer. This distance is then divided by 2 to obtain the thickness of the floating oil layer. In order to avoid the problem of oil layer thickness being different in different places due to fluctuations in the floating oil layer, the oil layer thickness monitoring unit can be used to monitor the oil layer thickness at the same location multiple times within the same time interval. If the oil layer thickness value fluctuates only within a preset threshold, the oil layer thickness value is averaged to obtain the thickness of the oil layer.

[0028] After obtaining the oil layer thickness data, the external pump can be controlled to collect oil through the oil collection pipe 3. Since the manhole core 7 penetrates the lower part of the float 6, it is used to ensure that the manhole core 7 is submerged below the liquid surface, preventing the formation of an oil and gas space below the manhole. Therefore, the lower part of the monitoring cylinder 9 is also submerged in the oil layer. Under the action of gravity, the floating oil enters the transfer cylinder 10 through the oil suction pipe 11, and then the floating oil is discharged to the oil collection pipe 3 through the oil guide pipe 12. This achieves the recovery of the floating oil. Compared with the existing technology that directly sets the oil collection port at the lower part of the float, this method is more efficient during the oil collection process. As the floating oil is pumped away, the surface of the floating oil fluctuates, which leads to changes in the thickness of the floating oil layer. This can interfere with the ultrasonic detection of the floating oil layer thickness. The present invention transfers the floating oil into the transfer cylinder 10 first and extends the oil suction pipe 11 into the floating oil layer. The floating oil in the transfer cylinder 10 does not come into contact with the surface of the floating oil layer in the tank 1, which reduces the interference to the surface of the floating oil layer in the tank 1 during the oil collection process. This ensures that the oil layer thickness monitoring can still be carried out synchronously and the data is reliable during continuous oil collection operations.

[0029] Considering that as the floating oil is pumped away, the thickness of the oil layer decreases, and the floating plate body 4 will gradually approach the water layer, if the oil suction pipe 11 enters the water layer excessively, the water layer will also enter the transfer cylinder 10 through the oil suction pipe 11, increasing the load and cost of subsequent oil-water separation, and thus rendering the oil recovery ineffective. Therefore, an oil level sensor is installed at the lower part of the oil suction pipe 11. The difference in density between water and oil causes the position of the float in the sensor to change, thereby triggering different signals, which can be used to monitor the oil-water interface. The oil level sensor can accurately distinguish between the water layer and the oil layer. When the oil level sensor detects that the water layer has been reached, the oil recovery work of the external pump is stopped, achieving precise control of the oil recovery flow rate and preventing the water layer from entering the transfer cylinder 10.

[0030] As the oil recovery process proceeds, the buoyancy of the floating roof body 4 will change, which may cause the floating roof body 4 to float or tilt, causing the oil suction pipe 11 to separate from the oil layer surface of the floating oil. Gas will enter the oil suction pipe 11, which will cause the external oil recovery pump to run dry, potentially leading to overheating or seal damage, posing a safety risk. Therefore, the upper part of the oil suction pipe 11 is close to the inner top wall of the transfer cylinder 10, and the opening of the oil guide pipe 12 is close to the inner bottom wall of the transfer cylinder 10. The upper opening of the oil guide pipe 12 is located below the floating oil surface inside the transfer cylinder 10. Even if gas enters the transfer cylinder 10, the gas will only accumulate in the upper part of the transfer cylinder 10 and will not enter the oil guide pipe 12.

[0031] Second embodiment: Based on the first embodiment, according to Figures 1-7 As shown, it also includes a sampling stage 903 and a sealing ball 904; the sampling stage 903 is installed on the upper part of the monitoring cylinder 9; the sampling stage 903 is connected to the monitoring cylinder 9; the sampling stage 903 is funnel-shaped; the sealing ball 904 is detachably connected to the sampling stage 903; the diameter of the sealing ball 904 is larger than the diameter of the hole at the lower part of the sampling stage 903.

[0032] It also includes a partition 13 and a U-shaped tube 14; an annular partition 13 is fixed between the manhole core 7 and the monitoring cylinder 9; an annular cavity is formed between the transfer cylinder 10 and the partition 13; a number of U-shaped tubes 14 arranged in an annular array are connected between the transfer cylinder 10 and the annular cavity; and the upper part of the monitoring cylinder 9 is connected to the annular cavity.

[0033] All U-shaped tubes 14 penetrate the partition 13.

[0034] It also includes a ventilation pipe 15 and an absorption cylinder 16; the partition 13 connects two symmetrically distributed ventilation pipes 15; each ventilation pipe 15 is detachably connected to an absorption cylinder 16; the absorption cylinder 16 has an annular absorption chamber 1601; each absorption chamber 1601 is connected to an adjacent ventilation pipe 15; each absorption cylinder 16 has several air vents on its upper side wall; each air vent is provided with a filter screen 1602.

[0035] Based on the first embodiment, by setting a U-shaped tube 14, the gas in the transfer cylinder 10 can enter the annular cavity formed between the U-shaped tube 14 and the partition 13. The design of the U-shaped tube 14 can also effectively prevent the floating oil in the transfer cylinder 10 from flowing back into the annular cavity. Furthermore, the annular cavity is connected to the upper part of the monitoring cylinder 9, so that even if the floating body 4 floats or tilts, the floating oil layer in the monitoring cylinder 9 can communicate with the annular cavity. The annular cavity can also be connected to the manhole core 7 through the ventilation pipe 15 and the absorption cylinder 16. The manhole core 7 can be connected to the tank body 1. Therefore, the gas pressure of the floating oil layer in the monitoring cylinder 9 is the same as the atmospheric pressure in the tank body 1. The oil and gas can circulate between the monitoring cylinder 9 and the transfer cylinder 10 through the annular cavity formed between the transfer cylinder 10 and the partition 13, so that the pressure in the monitoring cylinder 9 and the transfer cylinder 10 is balanced, preventing the floating oil in the monitoring cylinder 9 from flowing back into the annular cavity when the floating body 4 floats or tilts. The change in the oil level affects the calculation of the subsequent floating oil layer thickness. The additional oil and gas generated by the floating oil layer can be discharged to the manhole core 7 through the ventilation pipe 15 and the absorption cylinder 16. To prevent oil and gas from accumulating at the bottom of the floating plate, activated carbon is filled in the absorption chamber 1601 of the absorption cylinder 16. When oil and gas enter the absorption chamber 1601 through the ventilation pipe 15, the activated carbon absorbs and purifies the oil and gas, effectively preventing pollution caused by oil and gas leakage. Then, the staff only needs to open the manhole cover 8 to enter the manhole core 7 to periodically remove and replace the absorption cylinder 16, which can effectively prevent oil and gas leakage. Then, the gas is released smoothly through the vent with filter screen 1602, providing a more stable pressure and cleaner gas composition measurement environment for the ultrasonic monitoring unit. This greatly reduces the impact of oil and gas fluctuations on the ultrasonic ranging accuracy and improves the reliability of the entire monitoring system in the real complex tank environment.

[0036] Furthermore, by removing the sealing ball 904, the floating oil can be manually sampled through the hole on the sampling stage 903. After sampling, the sealing ball 904 is placed back into the sampling stage 903. The funnel-shaped structure on the sampling stage 903 ensures that the sealing ball 904 fits precisely with the hole on the sampling stage 903, achieving a fully sealed effect and inhibiting the evaporation of oil from the source.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A full liquid floating disc device with oil layer thickness monitoring and oil collection functions, comprising a tank body (1); the tank body (1) is slidingly connected with a floating disc body (4); the tank body (1) is fixedly connected with two steel cables (5); the floating disc body (4) is slidingly connected with all the steel cables (5); characterized in that, The floating disc body (4) is detachably connected with a plurality of floating boxes (6); the floating box (6) is designed in a honeycomb shape; each floating box (6) is fixedly connected with a manhole core (7); each manhole core (7) is detachably connected with a manhole cover (8); each manhole core (7) is fixedly connected with a monitoring cylinder (9); each manhole core (7) penetrates a lower part of a floating box (6); the lower part of the monitoring cylinder (9) is flush with the bottom of the manhole core (7); the upper part of the monitoring cylinder (9) is connected with an oil layer thickness monitoring unit; the manhole core (7) and the monitoring cylinder (9) are fixedly connected with a transfer cylinder (10); the lower part of the transfer cylinder (10) is communicated with a plurality of oil suction pipes (11); the upper part of the oil suction pipe (11) is close to the inner top wall of the transfer cylinder (10); the lower part of the transfer cylinder (10) is communicated with an oil guide pipe (12); the opening of the oil guide pipe (12) is close to the inner bottom wall of the transfer cylinder (10).

2. The full-liquid floating disc device with oil layer thickness monitoring and oil collecting functions according to claim 1, characterized in that, The floating disc body (4) is composed of a connecting beam (401) and a float (402); the floating disc body (4) is provided with the connecting beam (401); the connecting beam (401) is fixedly connected with a plurality of floats (402); the connecting beam (401) is connected with all the floating boxes (6).

3. The full-liquid floating disc device with oil layer thickness monitoring and oil collecting functions according to claim 1, characterized in that, Further comprising a water inlet pipe (2) and an oil collecting pipe (3); the tank body (1) is communicated with the water inlet pipe (2); the tank body (1) is fixedly connected with the oil collecting pipe (3); the oil guide pipe (12) is communicated with the oil collecting pipe (3).

4. The full-liquid floating disc device with oil layer thickness monitoring and oil collecting functions according to claim 2, characterized in that, A hollow screw is arranged on the floating disc body (4), and the steel cable (5) passes through the hollow screw, and a tetrafluoro filler ring is additionally arranged above the screw.

5. The full-liquid floating disc device with oil layer thickness monitoring and oil collecting functions according to claim 1, characterized in that, An oil level sensor is arranged at the bottom of each oil suction pipe (11).

6. The full-liquid floating disc device with oil layer thickness monitoring and oil collecting functions according to any one of claims 1-5, characterized in that, The oil layer thickness monitoring unit comprises an ultrasonic transmitter (901) and an ultrasonic receiver (902); the monitoring cylinder (9) is a hollow cylinder with an open lower end; the upper part of the monitoring cylinder (9) is higher than the bottom of the floating box (6); the ultrasonic transmitter (901) and the ultrasonic receiver (902) are arranged on the upper part of the monitoring cylinder (9); the ultrasonic transmitter (901) and the ultrasonic receiver (902) are both higher than the bottom of the floating box (6).

7. The full-liquid floating disc device with oil layer thickness monitoring and oil collecting functions according to claim 6, characterized in that, Further comprising a sampling platform (903) and a sealing ball (904); the sampling platform (903) is arranged on the upper part of the monitoring cylinder (9); the sampling platform (903) is communicated with the monitoring cylinder (9); the sampling platform (903) is funnel-shaped; the sealing ball (904) is detachably connected to the sampling platform (903); the diameter of the sealing ball (904) is greater than the diameter of the hole at the lower part of the sampling platform (903).

8. The full-liquid floating disc device with oil layer thickness monitoring and oil collecting functions according to claim 7, characterized in that, Further comprising a partition plate (13) and a U-shaped pipe (14); the partition plate (13) is fixedly connected between the manhole core (7) and the monitoring cylinder (9); the transfer cylinder (10) and the partition plate (13) form an annular cavity; the transfer cylinder (10) is communicated with a plurality of U-shaped pipes (14) with the annular cavity; the upper part of the monitoring cylinder (9) is communicated with the annular cavity.

9. The full liquid receiving floating disc device with oil layer thickness monitoring and oil collecting functions according to claim 8, characterized in that, All the U-shaped pipes (14) penetrate the partition plate (13).

10. The full liquid receiving floating disc device with oil layer thickness monitoring and oil collecting functions according to claim 9, characterized in that, The air exchange pipe (15) and the absorption cylinder (16) are further included; the partition plate (13) is communicated with two air exchange pipes (15); one absorption cylinder (16) is detachably connected to each air exchange pipe (15); the absorption cavity (1601) is formed in the absorption cylinder (16); each absorption cavity (1601) is communicated with one adjacent air exchange pipe (15); a plurality of air vents are formed in the upper side wall of each absorption cylinder (16); and a filter screen (1602) is arranged in each air vent.

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