On-line detection device for quantity of liquid petroleum products in tank

Abstract

An on-line detection device for the number of liquid petroleum products in a tank comprises a detection probe, the detection probe comprises a connecting base, the two ends of the connecting base are connected with a sealing protection pipe and an outer protection pipe respectively, and a water content sensor and a density sensor are installed below the connecting base side by side; a signal processing unit is arranged in the sealing protective pipe on the connecting seat; the signal output ends of the moisture content sensor and the density sensor are electrically connected with the signal processing unit; a connecting sleeve is detachably connected to the upper end of the sealing protection pipe, a cable locking piece is fixed to the upper end of the connecting sleeve, the signal output end of the signal processing unit is connected with a load-bearing cable through a sealing joint, and the load-bearing cable penetrates out of the cable locking piece and is clamped through the cable locking piece; the device is further provided with a throwing device, and the upper end of the load-bearing cable penetrates into a machine base of the throwing device and is wound on a winding drum of the throwing device. The device can realize online, automatic and accurate detection of the quantity of liquid petroleum products in the petrochemical tank, and is high in detection precision and high in speed.

Description

Technical Field

[0001] The utility model relates to an on - line detection device, in particular to an on - line detection device for the quantity of liquid petroleum products in a tank. Background Art

[0002] The quantity detection of the oil in the oil tank in the petroleum and petrochemical industries is an important technical detection work for liquid petroleum products. The traditional method of obtaining quantity data by measuring the volume of the liquid in the tank adopts a manual detection method, and the main steps are as follows: manually climb the large tank to take samples from the upper, middle and lower layers, the laboratory makes samples and analyzes the water content of each layer, collect the liquid level height signal through a radar liquid level gauge, manually deduct the total water content therein, and finally obtain the volume quantity of the liquid in the tank.

[0003] This traditional manual detection method has great problems: one is the high labor intensity; the second is that the operator climbing the large tank has safety risks; the third is the slow measurement speed and large measurement error; the fourth is that it is easy to have human cheating. These problems have caused great economic losses to the country and petrochemical enterprises. Therefore, the traditional detection method has fallen behind the development needs of the petroleum and petrochemical industries. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide an on - line detection device for the quantity of liquid petroleum products in a tank, which can realize on - line, automatic and accurate detection of the quantity of liquid petroleum products in a petrochemical tank.

[0005] The technical solution of the utility model is as follows:

[0006] An on - line detection device for the quantity of liquid petroleum products in a tank includes a detection probe. The detection probe includes a connecting seat, a sealing protection tube and an outer protection tube are respectively connected to the upper and lower ends of the connecting seat. A water content sensor and a density sensor are installed in parallel below the connecting seat, which are respectively used for collecting the water content and density at different positions in the oil tank; the outer protection tube is sleeved outside the water content sensor and the density sensor for protecting the water content sensor and the density sensor;

[0007] A signal processing unit is arranged in the sealing protection tube above the connecting seat. The signal output ends of the water content sensor and the density sensor are electrically connected to the signal processing unit, which is used for receiving the signals collected by the sensors, processing them and then transmitting them to the single - chip microcomputer controller;

[0008] An adapter sleeve is detachably connected to the upper end of the sealing protection tube, a cable locking part is fixed at the upper end of the adapter sleeve, the signal output end of the signal processing unit is connected with a load - bearing cable through a sealing joint arranged at the lower end inside the adapter sleeve, and the load - bearing cable passes through the cable locking part and is clamped by the cable locking part;

[0009] The device is also provided with a feeding device. The upper end of the load-bearing cable penetrates into the base of the feeding device and is wound around the reel of the feeding device, so as to facilitate the lifting and lowering of the detection probe.

[0010] As a further preference, a temperature sensor is provided at the lower end of the density sensor. The signal output end of the temperature sensor passes through the density sensor and is electrically connected to the signal processing unit, which is used to detect the temperature at different positions in the oil tank.

[0011] As a further preference, an eccentrically arranged pressure tapping hole is provided on the connecting seat, and a pressure sensor is installed in the pressure tapping hole. The signal output end of the pressure sensor is electrically connected to the signal processing unit, which is used to detect the pressure at different positions in the oil tank.

[0012] As a further preference, the water content sensor is an SH type radio frequency water content sensor, and the upper end is fixed on the connecting seat by threaded connection.

[0013] As a further preference, the density sensor is a tuning fork type liquid density sensor, and the upper end is fixed on the connecting seat by threaded connection.

[0014] As a further preference, the signal processing unit includes a signal conversion module, a microprocessor and a communication module connected in sequence. The signal conversion module is an analog-to-digital conversion chip, which is used to receive the signals of each sensor and perform conversion; the microprocessor is used to receive the converted data and transmit it to the single-chip microcomputer controller through the communication module.

[0015] As a further preference, the feeding device includes a base. An explosion-proof housing is provided on one side of the base. A reduction motor is installed in the explosion-proof housing. A hollow main shaft is installed through the output end of the reduction motor. One end of the main shaft is inserted into the base and the reel is fixed. A rotary encoder and a conductive slip ring are provided between the other end of the main shaft and the body of the reduction motor. The upper end of the load-bearing cable is wound around the reel and then passes through the central hole of the main shaft and is electrically connected to the conductive slip ring, and is connected to the single-chip microcomputer controller through the conductive slip ring.

[0016] As a further preference, the single-chip microcomputer controller is fixed on one side of the body of the reduction motor.

[0017] The beneficial effects of the present utility model are:

[0018] Lower the detection probe through the load-bearing cable by the delivery device, so that the detection probe passes through and identifies the oil layer, mixed layer, and water layer of the liquid petroleum product in the oil tank from top to bottom; the moisture content sensor installed in the detection probe can directly detect the liquid moisture content in the oil tank, and the density sensor installed in the detection probe can directly detect the liquid density value in the oil tank; the temperature sensor installed at the lower end of the density sensor can directly detect the liquid temperature value in the oil tank; the pressure sensor installed in the detection probe can directly detect the liquid pressure value; the signal processing unit installed in the detection probe receives the signals collected by each sensor, processes them, and then transmits them to the single-chip microcomputer controller. Through the calculation of the single-chip microcomputer controller, the volume quantity data of the liquid petroleum product in the oil tank can be automatically obtained. Therefore, this device can realize on-line, automatic, and accurate detection of the quantity of liquid petroleum products in petrochemical tanks, with high detection accuracy and speed, can avoid the safety risks brought by manual operations, and at the same time can completely eliminate the phenomenon of cheating by human factors and prevent the loss of national property. Brief Description of the Drawings

[0019] Figure 1 is the structural schematic diagram of the present utility model.

[0020] Figure 2 is the structural schematic diagram of the detection probe of the present utility model.

[0021] Figure 3 is Figure 2 the A-A sectional view of

[0022] Figure 4 is the partial sectional view of the connecting seat.

[0023] Figure 5 is the structural block diagram of the signal processing unit.

[0024] Figure 6 is the structural sectional view of the delivery device.

[0025] Figure 7 is Figure 6 the B-B sectional view of

[0026] In the figure: detection probe 1, machine base 2, load-bearing cable 3, reel 4, explosion-proof housing 5, connecting seat 6, sealing tube 7, adapter sleeve 8, cable lock 9, sealing sleeve 10, sealing joint 11, signal processing unit 12, pressure sensor 13, density sensor 14, temperature sensor 15, moisture content sensor 16, outer protection tube 17, sealing cover 18, joint seat 19, main shaft 20, reduction motor 21, rotary encoder 22, slip ring 23, copper stud 24, sealing joint 25, single-chip microcomputer controller 26. Detailed Embodiment

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] As Figures 1-4 shown, an on-line detection device for the quantity of liquid petroleum products in a tank according to the present invention includes a detection probe 1. The detection probe 1 includes a connection base 6. A sealing protection tube 7 and an outer protection tube 17 are respectively connected to the upper and lower ends of the connection base 6 by threads. A water content sensor 16 and a density sensor 14 are installed in parallel below the connection base 6, which are respectively used to collect the water content and density at different positions in the oil tank; the outer protection tube 17 is sleeved outside the water content sensor 16 and the density sensor 14 to protect the water content sensor 16 and the density sensor 14; a plurality of rectangular long holes are evenly distributed along the circumferential direction on the outer wall of the outer protection tube 17 so that the liquid to be detected can flow in.

[0029] The water content sensor 16 is an SH-type radio frequency water content sensor, and the upper end is fixedly connected to the connection base 6 by threads; the density sensor 14 is a tuning fork type liquid density sensor, and the upper end is fixedly connected to the connection base 6 by threads.

[0030] A signal processing unit 12 is installed in the sealing protection tube 7 above the connection base 6. The signal output ends of the water content sensor 16 and the density sensor 14 are electrically connected to the signal processing unit 12, which is used to receive the signals collected by the sensors and process them and then transmit them to the single-chip microcomputer controller 26; a connection sleeve 8 is inserted and fixedly connected to the upper end of the sealing protection tube 7 by a setscrew. A cable locking part 9 is fixed to the upper end of the connection sleeve 8. The signal output end of the signal processing unit 12 is connected to a load-bearing cable 3 through a sealing joint 11 arranged at the lower end inside the connection sleeve 8. The load-bearing cable 3 passes through the cable locking part 9 and is clamped by the cable locking part 9. A sealing sleeve 10 is sleeved outside the load-bearing cable 3 inside the connection sleeve 8.

[0031] The cable locking part 9 is formed by buckling two semi-cylinders and connected by screws. The lower end of the cable locking part 9 is stuck in the annular groove at the upper end of the connection sleeve 8.

[0032] A temperature sensor 15 is fixedly welded to the lower end of the density sensor 14. The temperature sensor uses PT100 and the signal output end passes through the density sensor 14 and is electrically connected to the signal processing unit 12, which is used to detect the temperature at different positions in the oil tank.

[0033] A stepped pressure guiding hole arranged eccentrically is provided on the connecting seat 6. A pressure sensor 13 is installed in the pressure guiding hole by means of a thread. The signal output end of the pressure sensor 13 is electrically connected to the signal processing unit 12 and is used for detecting the pressures at different positions inside the oil tank.

[0034] As Figure 2 and Figure 5 shown, the signal processing unit 12 includes a circuit board fixed on the connecting seat 6 by means of copper studs. A signal conversion module, a microprocessor and a communication module are sequentially arranged on the circuit board. The signal conversion module is an ADS analog-to-digital conversion chip and is used for receiving the signals of each sensor and performing conversion; the microprocessor adopts ATMEGA128A and is used for receiving the converted data and transmitting same to the single-chip microcomputer controller 26 through the communication module. The communication module adopts an RS485 module and is used for connecting the power line and the signal line.

[0035] The device is further provided with a dropping device. The upper end of the load-bearing cable 3 penetrates into the base of the dropping device and is wound around the reel of the dropping device so as to facilitate controlling the lifting of the detection probe 1.

[0036] As Figure 6 and Figure 7 shown, the dropping device includes a base 2. An explosion-proof housing 5 is fixedly connected to one side of the base 2 through a joint seat 19. A reduction motor 21 is installed inside the explosion-proof housing 5. A hollow main shaft 20 is installed through the output end of the reduction motor 21. One end of the main shaft 20 penetrates through the joint seat and then inserts into the base 2 and is fixed with the reel 4 through a flange. A rolling bearing is installed between the joint seat 19 and the main shaft 20. A rotary encoder 22 and a slip ring 23 are arranged between the other end of the main shaft 20 and the body of the reduction motor 21. The stators of the rotary encoder 22 and the slip ring 23 are respectively fixed on the body of the reduction motor 21 by means of copper studs 24. The rotors of the rotary encoder 22 and the slip ring 23 are sequentially fixed to the other end of the main shaft 20. The upper end of the load-bearing cable 3 is wound around the reel 4 and then passes through the central hole of the main shaft 20 and is electrically connected to the slip ring 23 and is electrically connected to the single-chip microcomputer controller 26 through the slip ring 23; the signal output end of the rotary encoder 22 is electrically connected to the single-chip microcomputer controller 26 and is used for detecting the lifting height of the detection probe 1.

[0037] The single-chip microcomputer controller 26 is fixed to one side of the body of the reduction motor 21. A sealing joint 25 is inserted into the central hole at one end of the main shaft 20. A sealing cover 18 is connected to the outer end of the flange at one end of the main shaft 20. The load-bearing cable 3 is inserted into the sealing cover 18 and is electrically connected to the slip ring 23 through the sealing joint 25 and a wire.

[0038] In use, the dispensing device is fixed to the detection port at the upper end of the oil tank through the machine base 2, and the detection probe 1 is inserted into the oil tank through the detection port. During detection, the control deceleration motor 21 is started to drive the reel 4 to rotate and release the load-bearing cable 3, and the detection probe 1 moves downward by its own weight into the liquid in the oil tank, so that the detection probe 1 sequentially passes through and identifies the oil layer, mixed layer, and water layer of the liquid petroleum product in the oil tank from top to bottom; the moisture content sensor 16 provided in the detection probe 1 can directly detect the moisture content of the liquid in the oil tank, and the density sensor 14 provided in the detection probe 1 can directly detect the liquid density value in the oil tank; the temperature sensor provided at the lower end of the density sensor 14 can directly detect the liquid temperature value in the oil tank; the pressure sensor 13 provided in the detection probe 1 can directly detect the liquid pressure value; the signal processing unit 12 provided in the detection probe 1 receives the signals collected by each sensor, processes them, and then transmits them to the single-chip microcomputer controller 26. Through the calculation of the single-chip microcomputer controller 26, the volume quantity data of the liquid petroleum product in the oil tank can be automatically obtained.

[0039] Although the embodiments of the present invention have been disclosed above, it is not limited to the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the illustrated and described examples here.

Claims

1. An online detection device for the amount of liquid petroleum products in a tank, characterized by: The detection probe includes a connection seat, and a sealing protective tube and an outer protective tube are respectively connected to the upper and lower ends of the connection seat. A water content sensor and a density sensor are installed in parallel below the connection seat, respectively used to collect the water content and density at different positions in the oil tank; the outer protective tube is sleeved outside the water content sensor and the density sensor, and is used to protect the water content sensor and the density sensor; A signal processing unit is provided on the connection seat in the sealing protective tube, and the signal output ends of the moisture content sensor and the density sensor are electrically connected to the signal processing unit, which is used to receive the signals collected by the sensors and transmit them to the single-chip controller after processing; A connection sleeve is detachably connected to the upper end of the sealing protective tube, a cable lock is fixed to the upper end of the connection sleeve, the signal output end of the signal processing unit is connected to a load-bearing cable through a sealing joint arranged at the lower end of the connection sleeve, and the load-bearing cable passes through the cable lock and is clamped by the cable lock; The device is also provided with a launching device, the upper end of the load-bearing cable penetrates into the base of the launching device and is wound on the reel of the launching device, so as to control the lifting and lowering of the detection probe.

2. The device for online detection of the amount of liquid petroleum products in a tank according to claim 1 is characterized in that: A temperature sensor is provided at the lower end of the density sensor. The signal output end of the temperature sensor passes through the density sensor and is electrically connected to the signal processing unit for detecting the temperature at different positions in the oil tank.

3. The device for online detection of the amount of liquid petroleum products in a tank according to claim 1 or 2, characterized in that: An eccentrically arranged pressure-inducing hole is provided on the connecting seat, a pressure sensor is installed in the pressure-inducing hole, and a signal output end of the pressure sensor is electrically connected to a signal processing unit for detecting pressure at different positions in the oil tank.

4. The device for online detection of the amount of liquid petroleum products in a tank according to claim 1 is characterized in that: The moisture content sensor is an SH type radio frequency moisture content sensor, and the upper end is fixed on the connection base through a threaded connection.

5. The device for online detection of the amount of liquid petroleum products in a tank according to claim 1 is characterized in that: The density sensor is a tuning fork type liquid density sensor, and the upper end is fixed on the connecting seat through a threaded connection.

6. The device for online detection of the amount of liquid petroleum products in a tank according to claim 1 is characterized in that: The signal processing unit includes a signal conversion module, a microprocessor and a communication module connected in sequence. The signal conversion module is an analog-to-digital conversion chip used to receive and convert signals from various sensors; the microprocessor is used to receive the converted data and transmit it to the single-chip controller through the communication module.

7. The device for online detection of the amount of liquid petroleum products in a tank according to claim 1 is characterized in that: The delivery device includes a machine base, an explosion-proof shell is provided on one side of the machine base, a reduction motor is installed in the explosion-proof shell, a hollow main shaft is installed through the output end of the reduction motor, one end of the main shaft is inserted into the machine base and the reel is fixed thereon, a rotary encoder and a conductive slip ring are provided between the other end of the main shaft and the body of the reduction motor, the upper end of the load-bearing cable is wound around the reel and passes through the center hole of the main shaft to be electrically connected to the conductive slip ring, and is connected to the single-chip microcomputer controller through the conductive slip ring.

8. The device for online detection of the amount of liquid petroleum products in a tank according to claim 7 is characterized in that: The single chip microcomputer controller is fixed on one side of the body of the reduction motor.

Images