CN107727445A - A kind of hundred point sampling systems - Google Patents

Abstract

The invention discloses a hundred-point sampling system, which relates to the technical field of oil tank sampling. The system includes an oil tank, a sampling position positioning mechanism, a main flow mechanism, a sampling measurement mechanism, and a data collection and processing control mechanism. Oil, the sampling position positioning mechanism includes an oil suction device that can be lifted and lowered in the vertical direction in the oil tank according to the specified position. The main process mechanism includes a sampling tube that can be lifted and lowered with the oil suction device and connected with the oil suction device. Connect the oil pump outside the oil tank. The sampling and metering mechanism includes a pipeline connected to the oil pump. There is a sampling valve on the pipeline. The end of the pipeline is connected to a sampling bottle. The sampling bottle is connected to an oil and gas adsorption tank. sensor, the signal output end of the oil-water interface sensor is connected to the data collection and processing control mechanism. It has the characteristics of accurate liquid level measurement function, novel structure, stable working performance and good safety performance.

Description

A Hundred Point Sampling System

technical field

The invention relates to the technical field of oil tank sampling.

Background technique

At present, oil products in oil tanks are mainly sampled from the top, middle, bottom, and bottom using the principle of an equal ratio tracker. This method has a complex structure inside the tank, and the sampling tube is easy to loosen and fall off, resulting in inaccurate parameters, resulting in safety production accidents. Therefore, many companies have returned to the original manual sampling, and its drawbacks have been confirmed by countless examples. The hundred-point sampling system has completely solved the above problems.

Contents of the invention

The technical problem to be solved by the present invention is to provide a 100-point sampling system, which integrates liquid level measurement, sampling and dehydration, and has the characteristics of stable working performance and good safety performance.

The technical solution is a 100-point sampling system, which includes an oil tank, a sampling position positioning mechanism, a main process mechanism, a sampling measurement mechanism, and a data collection and processing control mechanism. Oil is placed in the oil tank, and the sampling The position positioning mechanism includes an oil suction device that can be lifted and lowered vertically in the oil tank according to a specified position. The main process mechanism includes a sampling tube that can be lifted and lowered with the oil product suction device and connected with the oil product suction device. The sampling tube Connect the oil pump outside the oil tank, the sampling and metering mechanism includes a pipeline connected to the oil pump, a sampling valve is arranged on the pipeline, a sampling bottle is connected to the end of the pipeline, and an oil gas adsorption tank is connected to the sampling bottle. The sampling valve is equipped with an oil-water interface sensor, and the signal output end of the oil-water interface sensor is connected to the data acquisition and processing control mechanism.

Preferably, the sampling position positioning mechanism also includes an inverted "W" type twisted rope liquid sealer, an explosion-proof servo motor and a reducer, a winch, a twisted rope, a fixed pulley, and a weight, and the explosion-proof servo motor is connected with a reducer , the explosion-proof servo motor is used to drive the winch to rotate, the winch is wound with a twisted rope, and the twisted rope bypasses the inverted "W" type twisted rope liquid sealer and then connects the weight and hangs down into the oil tank. The heavy hammer is provided with an oil inhaler, and the explosion-proof servo motor is controlled by a data acquisition and processing control mechanism.

Preferably, the sampling position positioning mechanism also includes an inverted "W" type twisted rope liquid sealer, a hand winch, a twisted rope, a fixed pulley, a weight, and an addressing scale, and the twisted rope is wound on the winch, The twisted rope bypasses the inverted "W" type twisted rope liquid sealer and then connects the weight and hangs down into the oil tank. The heavy hammer is equipped with an oil suction device, and the twisted rope is connected to the addressing scale The pointer of the ruler, the pointer can indicate the corresponding value along with the movement of the twisted rope.

Preferably, the pipeline in the sampling metering mechanism includes a return part and a sampling part, the sampling valve and the sampling bottle are installed in the sampling part, the return part communicates with the inside of the oil tank and is provided with a check valve, the return A water content measuring instrument and a dehydration valve are arranged on the upper part, the signal output end of the water content measuring instrument is connected to the signal input end of the data collection and processing control mechanism, and the signal output end of the data collection and processing control mechanism is connected to the dehydration valve. signal input.

Preferably, the oil pump is an intelligent explosion-proof circulating oil pump or a manual magnetic pump or a pneumatic magnetic pump or a turbo pump for a manual magnetic pump.

Preferably, the data collection and processing control mechanism includes a control cabinet, a PLC controller is arranged inside the control cabinet, and the signal output end of the water content measuring instrument or the oil-water interface sensor is connected to the signal input end of the PLC controller. The signal output end of the PLC controller is connected with the signal input ends of the explosion-proof servo motor, the oil pump and the dehydration valve.

Preferably, the explosion-proof servo motor is installed at the manhole above the oil tank. .

Preferably, there is a root filling valve at the root of the oil tank where the return part communicates, and the check valve is also arranged at the root of the tank.

The present invention completely subverts the sampling idea of the existing background technology. The system can address any height in the tank according to the requirements of on-site sampling. Integrate position measurement to realize automatic inventory. This system reduces the labor intensity of workers and meets the national requirements of "safety, health and environment". It reflects the modern scientific management mode and has important practical significance.

Description of drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of another embodiment of the present invention.

Among them, 1. Oil tank, 2. Sampling pipe, 3. Oil pump, 4. Sampling valve, 5. Sampling bottle, 6. Explosion-proof servo motor, 7. Winch, 8. Twisted rope, 9. Heavy hammer, 10. Water content measurement Instrument, 11. Control cabinet, 12. Oil gas adsorption tank, 13. "W" type twisted rope liquid sealer, 14. Hand winch, 15. Addressing scale, 16. Check valve, 17. Tank root valve.

detailed description

Below in conjunction with accompanying drawing and specific embodiment, the present invention is described in further detail: a kind of one-hundred-point sampling system as shown in Fig. 1 and Fig. 2, this system comprises oil tank 1, sampling position positioning mechanism, main process mechanism, sampling metering Mechanism, data acquisition and processing control mechanism, the oil tank 1 is filled with oil, the sampling position positioning mechanism includes an oil suction device that can be lifted and lowered in the vertical direction in the oil tank 1 according to the specified position, and the main process mechanism It includes a sampling pipe 2 that can be lifted and lowered with the oil suction device and connected with the oil suction device. The sampling pipe 2 is connected to the oil pump 3 outside the oil tank 1. The sampling and metering mechanism includes a pipeline connected to the oil pump 3. The pipeline is provided with a sampling valve 4, the end of the pipeline is connected with a sampling bottle 5, and the sampling bottle 5 is connected with an oil gas adsorption tank 12, the sampling valve 4 is provided with an oil-water interface sensor, and the signal of the oil-water interface sensor is The output end is connected to the data collection and processing control mechanism.

The sampling position positioning mechanism also includes an inverted "W" type twisted rope liquid sealer 13, an explosion-proof servo motor 6 and a reducer, a winch 7, a twisted rope 8, a fixed pulley, and a weight 9. The explosion-proof servo motor 6 is connected with a speed reducer. machine, the explosion-proof servo motor 6 is used to drive the winch 7 to rotate, the winch 7 is wound with a twisted rope 8, and the twisted rope 8 bypasses the inverted "W" type twisted rope liquid sealer 13 and then connects the weight 9 And droop into the oil tank 1, the heavy hammer 9 is provided with an oil inhaler, and the explosion-proof servo motor 6 is controlled by the data acquisition and processing control mechanism.

The sampling position positioning mechanism also includes an inverted "W" type twisted rope liquid sealer 13, a hand winch 14, a twisted rope 8, a fixed pulley, a weight 9, and an addressing scale 15, and the twisted rope is wound on the winch 7. 8. The twisted rope 8 bypasses the inverted "W" type twisted rope liquid sealer 13, and then connects the weight 9 and hangs down into the oil tank 1. The weight 9 is provided with an oil inhaler, and the twisted rope The rope 8 is connected to the pointer of the addressing scale 15 , and the pointer can indicate the corresponding value with the movement of the twisted rope 8 .

The pipeline in the sampling metering mechanism includes a return part and a sampling part, the sampling valve 4 and the sampling bottle 5 are all installed in the sampling part, the return part communicates with the inside of the oil tank 1 and is provided with a check valve 16, and the return part A water content measuring instrument and a dehydration valve are arranged on it, the signal output end of the water content measuring instrument 10 is connected to the signal input end of the data collection and processing control mechanism, and the signal output end of the data collection and processing control mechanism is connected to the dehydration valve. signal input.

The oil pump 3 is an intelligent explosion-proof circulating oil pump or a manual magnetic pump or a pneumatic magnetic pump or a turbo pump for a manual magnetic pump.

The data acquisition and processing control mechanism includes a control cabinet, in which a PLC controller is arranged in the control cabinet 11, and the signal output end of the water content measuring instrument 10 or the oil-water interface sensor is connected with the signal input end of the PLC controller, and the PLC control The signal output end of the device is connected with the signal input end of the explosion-proof servo motor 6, the oil pump 3, and the dehydration valve.

The explosion-proof servo motor 6 is installed at the manhole above the oil tank 1 . It can also be installed by opening a hole at a location selected by the user, and an inverted "W" type twisted rope liquid sealer 13 is welded above the installation hole to prevent oil and gas from overflowing along the steel rope and pollute the environment.

There is also a filling root valve 17 at the root of the oil tank 1 where the return flow part is connected, and the check valve 16 is also arranged at the root of the tank.

The motor current of the oil pump 3 is directly proportional to the load, and the instantaneous current when the oil pump 3 starts to evacuate is the liquid level position current. This signal output terminal is connected to the input terminal of the PLC controller to determine the height value of the liquid level, its stability, The measurement accuracy is obviously better than other liquid level gauges at home and abroad.

If it is a manual or pneumatic type, it is equipped with a fluid sight glass, you can see whether the manual or pneumatic magnetic pump is evacuated, and it is equipped with an addressable scale 15 or a winch counter, and the user can sample according to the value of the scale or counter The bit addressing of the height, the moment the pump is evacuated is the liquid level height.

The sampling pipe 2 is a corrugated hose, which has better flexibility in the oil tank 1, so that it can be positioned accurately. The sampling valve 4 is a needle valve. When the user needs to take a sample, open the sampling valve 4 to take a sample. The valve 4 is connected to the sampling bottle 5 for sampling, and the oil gas is discharged into the adsorption tank for purification and returns to the atmosphere. Use the addressing method to determine the current height of the liquid in the oil tank 1. When the sample flows through the water content measuring instrument, the water content value of the sample is automatically given, representing the water content value of the current position; The result of this analysis, combined with the mathematical model established by our research, gives the profile distribution of the water content of the entire large tank, and then obtains the results of the oil volume and water volume of the oil tank 1. The control cabinet 11 is installed in the control room, and electronic devices such as PLC are installed in it. , according to the results of the oil volume and water volume, the switch value is output to control the dehydration of the oil tank 1.

The PLC mainly controls the explosion-proof servo motor 6 to adjust the sampling height according to the data collected on site and the data set by the user; controls the oil pump 3 to circulate and accurately sample; outputs the switch signal according to the calculated oil-water interface height, and controls the dehydration valve of the oil tank 1 to perform dehydration; The moment when the oil pump 3 starts to evacuate is the height of the liquid level, which has the function of liquid level measurement. It can remind the user whether the sample extracted at the current setting height is oil, water or oil-water mixture. After the whole process is completed, the remote computer will automatically calculate the oil-water content corresponding to the sampling point, and no longer need the measurer to test, Look up to calculate pure oil volume. It greatly reduces the intensity of manual labor, saves manpower and material resources; it can save a lot of production costs every year. If sampling at different heights is performed multiple times, the real-time pure oil volume of the entire oil tank 1 can be further calculated, the automatic inventory function of the oil tank 1 can be realized, and the result report can be output.

The present invention completely subverts the sampling idea of the existing background technology. The system can address any height in the tank according to the requirements of on-site sampling. Integrate position measurement to realize automatic inventory. This system reduces the labor intensity of workers and meets the national requirements of "safety, health and environment". It reflects the modern scientific management mode and has important practical significance.

Claims (8)

1. A hundred-point sampling system, characterized in that: the system includes an oil tank, a sampling position positioning mechanism, a main flow mechanism, a sampling metering mechanism, a data collection and processing control mechanism, oil is placed in the oil tank, and the The sampling position positioning mechanism includes an oil inhaler that can be lifted and lowered in the vertical direction in the oil tank according to a specified position. The pipe is connected to the oil pump outside the oil tank. The sampling and metering mechanism includes a pipeline connected to the oil pump. A sampling valve is arranged on the pipeline. The end of the pipeline is connected to a sampling bottle, and an oil gas adsorption tank is connected to the sampling bottle. The sampling valve is equipped with an oil-water interface sensor, and the signal output end of the oil-water interface sensor is connected to the data acquisition and processing control mechanism. 2. A hundred-point sampling system according to claim 1, characterized in that: the sampling position positioning mechanism also includes an inverted "W" type twisted rope liquid sealer, an explosion-proof servo motor and a reducer, a winch, a winch Rope, fixed pulley, weight, the explosion-proof servo motor is connected with a reducer, the explosion-proof servo motor is used to drive the winch to rotate, the winch is wound with a twisted rope, and the twisted rope goes around the inverted "W" The twisted rope liquid sealer is connected with a heavy hammer and hangs down into the oil tank. The heavy hammer is provided with an oil inhaler, and the explosion-proof servo motor is controlled by the data acquisition and processing control mechanism. 3. A hundred-point sampling system according to claim 1, characterized in that: the sampling position positioning mechanism also includes an inverted "W" type twisted rope liquid sealer, hand winch, twisted rope, fixed pulley, Heavy hammer, addressing scale, twisted rope is wound on the winch, and the twisted rope is connected to the heavy hammer after bypassing the inverted "W" type twisted rope liquid sealer and hangs down into the oil tank. An oil inhaler is provided, the twisted rope is connected to the pointer of the addressing scale, and the pointer can indicate a corresponding value along with the movement of the twisted rope. 4. A kind of hundred-point sampling system according to claim 2 or 3, characterized in that: the pipeline in the sampling metering mechanism includes a return part and a sampling part, and the sampling valve and the sampling bottle are installed in the sampling part , the return part communicates with the inside of the oil tank and is provided with a check valve, the return part is provided with a water content measuring instrument and a dehydration valve, and the signal output end of the water content measuring instrument is connected to the signal input of the data acquisition and processing control mechanism terminal, and the signal output terminal of the data collection and processing control mechanism is connected to the signal input terminal of the dehydration valve. 5. A hundred-point sampling system according to claim 4, characterized in that: the oil pump is an intelligent explosion-proof circulating oil pump or a manual magnetic pump or a pneumatic magnetic pump or a turbo pump for a manual magnetic pump. 6. A kind of one-hundred-point sampling system according to claim 5, characterized in that: said data collection and processing control mechanism comprises a control cabinet, a PLC controller is arranged inside said control cabinet, said water content measuring instrument and oil-water The signal output end of the interface sensor is connected with the signal input end of the PLC controller, and the signal output end of the PLC controller is connected with the signal input ends of the explosion-proof servo motor, the oil pump and the dehydration valve. 7. A hundred-point sampling system according to claim 6, characterized in that: the explosion-proof servo motor is installed at the manhole above the oil tank. 8. A hundred-point sampling system according to claim 7, characterized in that: there is a root irrigation valve at the root of the oil tank where the return part is connected, and the check valve is also arranged at the root of the tank.