On-line monitoring and real-time protection device and method for position and posture of floating roof of oil and gas storage facility

Abstract

The invention discloses an oil and gas storage facility floating roof pose on-line monitoring and real-time protection device and method.The device comprises a floating disc, an emergency stop valve and a feeding and discharging pump, the floating disc is arranged in a storage tank, the emergency stop valve is arranged on a feeding and discharging port of the storage tank, and the feeding and discharging pump is connected with the feeding and discharging port of the storage tank; a plurality of strong magnetic floaters are arranged on the upper surface of the floating disc in the circumferential direction of the floating disc, a plurality of liquid level display and remote transmission units are arranged on the outer wall of the storage tank in the circumferential direction of the storage tank, each liquid level display and remote transmission unit is connected with a cloud data storage server, and the cloud data storage server is connected with an analysis terminal. The analysis terminal is connected with the emergency stop valve and the feeding and discharging pump; and the inclination angle of the floating disc is calculated through the analysis terminal, so that the floating disc is monitored and protected on line. The floating disc monitoring device solves the problems that a storage tank body of an existing floating disc monitoring device is large in fixed load and high in cost.

Description

Online monitoring and real-time protection device and method for the position and attitude of floating roofs in oil and gas storage facilities Technical Field

[0001] This invention belongs to the field of floating roof status monitoring technology, specifically relating to an online monitoring and real-time protection device for the floating roof position of oil and gas storage facilities, and also to a method for online monitoring and real-time protection of the floating roof position of oil and gas storage facilities. Background Technology: As a crucial component of storage tanks, floating roofs are prone to serious accidents such as sinking due to warping, deformation, displacement, or jamming during liquid inlet and outlet operations. This is especially true for large oil and gas storage tanks with a capacity of 100,000 cubic meters and a diameter of up to 80 meters. The ultra-large size leads to low floating roof rigidity, making condition monitoring of the floating roof during liquid inlet and outlet operations extremely important. Currently, a utility model patent with publication number CN218288950 discloses a floating roof monitoring system comprising a storage tank, multiple radar rangefinders, and a controller. The radar rangefinders are mounted on the tank to measure the distance to the floating roof, and the controller activates an alarm based on the distance, achieving automatic monitoring of the floating roof. However, this system is only suitable for monitoring the floating roof status of internal floating roof tanks. For external floating roof tanks, where there is no fixed roof structure, radar rangefinders cannot be installed. The invention patent with publication number CN105346881A discloses a horizontal status monitoring system for an external floating roof tank, which includes a odometer, a fixed support, wire ropes, and an early warning device. It can monitor the horizontal status of the floating roof during operation and provide early warnings for accidents such as floating roof tilting or sinking. Although it can be used for status monitoring of the floating roof of an external floating roof tank, the number and length of the required wire ropes are too large, resulting in excessive weight of the mechanism, significantly increasing the fixed load on the tank wall, and affecting the structural safety of the tank. Utility model patent CN207908011U discloses a floating roof status monitoring sensing device. The floating roof is equipped with several monitoring sensing units arranged in a cross-shaped symmetrical pattern. A corrugated pipe containing optical fibers is installed at the edge of the floating roof's foam baffle. An explosion-proof flexible pipe containing optical fibers is installed between the top platform of the floating roof tank and the top platform of the floating roof tank. A galvanized pipe containing optical fibers is installed between the top platform of the floating roof tank and a data demodulator on the bottom outer wall of the floating roof tank. A data demodulator and a wireless data transmission base station are installed on the bottom outer wall of the floating roof tank. The optical fibers inside the galvanized pipe are connected to the data demodulator, which is connected to the wireless data transmission base station. The monitoring sensing units can monitor the liquid accumulation on the surface of the floating roof and the floating roof's tilt angle. The cross-shaped symmetrical distribution of the monitoring sensing units on the floating roof effectively monitors the liquid accumulation and tilt angle at different locations, improving the accuracy of floating roof monitoring. However, the use of fiber optic grating elements results in a higher device cost. Summary of the Invention

[0002] The purpose of this invention is to provide an online monitoring and real-time protection device for the floating roof position of oil and gas storage facilities, which solves the problems of large fixed load on the tank body and high cost of existing floating roof monitoring devices.

[0003] Another objective of this invention is to provide a method for online monitoring and real-time protection of the floating roof position of oil and gas storage facilities.

[0004] The technical solution adopted in this invention is an online monitoring and real-time protection device for the floating roof position of an oil and gas storage facility, comprising a floating roof, an emergency shut-off valve, and inlet / outlet pumps. The floating roof is installed inside the storage tank, the emergency shut-off valve is installed at the inlet / outlet of the storage tank, and the inlet / outlet pumps are connected to the inlet / outlet of the storage tank. Several strong magnetic floats are arranged on the upper surface of the floating roof along its circumference. Several liquid level display and remote transmission units are arranged on the outer wall of the storage tank along its circumference. Each liquid level display and remote transmission unit is connected to a cloud data storage server, which is connected to an analysis terminal. The analysis terminal is connected to the emergency shut-off valve and the inlet / outlet pumps. A further feature of this invention is that each liquid level display and remote transmission unit includes a magnetic ball level gauge, which is connected to a reed switch remote transmitter. Both the magnetic ball level gauge and the reed switch remote transmitter are located on the outer wall of the storage tank.

[0005] Several strong magnetic floats are arranged at equal intervals along the circumference of the floating disk.

[0006] The number of liquid level display and remote transmission units is equal to the number of strong magnetic floats and they are set in a one-to-one correspondence.

[0007] The magnetic poles of the strong magnetic float are opposite to those of the float in the magnetic ball level gauge.

[0008] Another technical solution adopted in this invention is a method for online monitoring and real-time protection of the floating roof position of oil and gas storage facilities. Using the aforementioned online monitoring and real-time protection device for the floating roof position of oil and gas storage facilities, the specific process is as follows: a strong magnetic float moves up and down with the floating roof. When the strong magnetic float moves, it causes the float of the corresponding magnetic ball level gauge to change position, thereby displaying the height of the corresponding position of the floating roof through the magnetic ball level gauge. A reed switch remote transmitter sends the height information to a cloud data storage server. The cloud data storage server sends the stored data to an analysis terminal to calculate the floating roof tilt angle. The calculated tilt angle is compared with a set threshold. If the tilt angle is greater than the threshold, the emergency shut-off valve or the feed pump is controlled to close.

[0009] The present invention is further characterized in that the specific process of the analysis terminal to calculate the floating plate tilt angle is as follows: (1) After the analysis terminal obtains the floating plate height information of the corresponding position of the magnetic ball level gauge, it filters out the maximum height and the minimum height; (2) It obtains the height difference Δh, that is, the maximum height - the minimum height = the height difference; (3) It solves for the floating plate tilt angle A, the expression of which is:

[0010] In the formula, r is the radius of the floating disk.

[0011] The beneficial effects of the present invention are: (1) The online monitoring and real-time protection device for the floating roof position of the oil and gas storage facility of the present invention has a simple structure. Through the cooperation of the strong magnetic float and the magnetic ball level gauge, no additional wiring is required, thereby reducing the fixed load on the tank body. It can also realize remote transmission through the reed switch remote transmitter. It can be applied to internal floating roof or external floating roof storage tanks. At the same time, the equipment cost is low, the on-site anti-interference ability is strong, and it has good prospects for promotion and application; (2) The online monitoring and real-time protection method for the floating roof position of the oil and gas storage facility of the present invention uses the triangle principle to obtain the floating roof tilt angle. The calculation process is simple and highly accurate. Attached Figure Description

[0012] Figure 1 is a schematic diagram of the structure of the online monitoring and real-time protection device for the floating roof posture of the oil and gas storage facility of the present invention; Figure 2 is a schematic diagram of the principle of floating roof tilt angle measurement in the online monitoring and real-time protection method for the floating roof posture of the oil and gas storage facility of the present invention.

[0013] In the diagram, 1. Floating plate, 2. Strong magnetic float, 3. Magnetic ball level gauge, 4. Reed switch remote transmitter, 5. Cloud data storage server, 6. Analysis terminal, 7. Emergency shut-off valve, 8. Feed pump. Detailed Implementation

[0014] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0015] Example 1: The online monitoring and real-time protection device for the floating roof position of the oil and gas storage facility of the present invention is shown in Figure 1. It includes a floating roof 1, an emergency shut-off valve 7, and a feed pump 8. The floating roof 1 is installed inside the storage tank. The emergency shut-off valve 7 is installed at the inlet and outlet of the storage tank. The feed pump 8 is connected to the inlet and outlet of the storage tank. Both the feed pump 8 and the emergency shut-off valve 7 are used to control whether to feed or discharge. Several strong magnetic floats 2 are evenly spaced on the upper surface of the floating roof 1 along its circumference. Several liquid level display and remote transmission units are installed on the outer wall of the storage tank along its circumference. The number of liquid level display and remote transmission units is the same as the number of strong magnetic floats 2. The number of units is equal and they are set one-to-one. The liquid level display and remote transmission unit is used to display and measure the height of the floating plate 1 where the strong magnetic float 2 is located. Each liquid level display and remote transmission unit is connected to the cloud data storage server 5. The data storage server 5 is used to store the acquired height information and transmit the height information to the analysis terminal 6. The cloud data storage server 5 is connected to the analysis terminal 6. The analysis terminal 6 is used to analyze the tilt angle of the floating plate 1 and compare the tilt angle with the set threshold. Based on the comparison result, it controls the start and stop of the emergency shut-off valve 7 and the feed pump 8. The analysis terminal 6 is connected to the emergency shut-off valve 7 and the feed pump 8.

[0016] The equidistant arrangement of several strong magnetic floats 2 makes the measured tilt angle information more accurate.

[0017] Example 2: The present invention provides an online monitoring and real-time protection device for the floating roof position of an oil and gas storage facility, comprising a floating roof 1, an emergency shut-off valve 7, and an inlet / outlet pump 8. The floating roof 1 is installed inside the storage tank, the emergency shut-off valve 7 is installed at the inlet / outlet of the storage tank, and the inlet / outlet pump 8 is connected to the inlet / outlet of the storage tank. Both the inlet / outlet pump 8 and the emergency shut-off valve 7 are used to control whether material is being fed or discharged. A plurality of strong magnetic floats 2 are evenly spaced on the upper surface of the floating roof 1 along its circumference. A plurality of liquid level display and remote transmission units are installed on the outer wall of the storage tank along its circumference, the number of which is equal to the number of strong magnetic floats 2. Each liquid level display and remote transmission unit is configured to display and measure the height of the floating plate 1 where the strong magnetic float 2 is located. Each liquid level display and remote transmission unit is connected to the cloud data storage server 5. The data storage server 5 is used to store the acquired height information and transmit the height information to the analysis terminal 6. The cloud data storage server 5 is connected to the analysis terminal 6. The analysis terminal 6 is used to analyze the tilt angle of the floating plate 1 and compare the tilt angle with the set threshold. Based on the comparison result, it controls the start and stop of the emergency shut-off valve 7 and the feed pump 8. The analysis terminal 6 is connected to the emergency shut-off valve 7 and the feed pump 8.

[0018] Each level display and remote transmission unit includes a magnetic ball level gauge 3, which can directly display the height of the corresponding floating plate 1. The magnetic ball level gauge 3 is connected to a reed switch remote transmitter 4, which is used to transmit the height information to the cloud data storage server 5. Both the magnetic ball level gauge 3 and the reed switch remote transmitter 4 are installed on the outer wall of the storage tank and are not connected to the storage tank. The magnetic poles of the strong magnetic float 2 are opposite to those of the float in the magnetic ball level gauge 3, so that when the strong magnetic float 2 moves with the floating plate 1, it drives the float in the magnetic ball level gauge 3 to move up and down, thereby displaying the height information.

[0019] Example 3: The method for online monitoring and real-time protection of the floating roof position of the oil and gas storage facility of the present invention adopts the above-mentioned online monitoring and real-time protection device for the floating roof position of the oil and gas storage facility. The specific process is as follows: The strong magnetic float 2 moves up and down with the floating plate 1. When the strong magnetic float 2 moves, it drives the float in the magnetic ball level gauge 3 corresponding to the strong magnetic float 2 to change position. Thus, the height of the corresponding position of the floating plate 1 is displayed by the magnetic ball level gauge 3. The reed switch remote transmitter 4 sends the height information to the cloud data storage server 5. The cloud data storage server 5 sends the stored data to the analysis terminal 6 to calculate the floating plate tilt angle. The calculated tilt angle is compared with the set threshold. If the tilt angle is greater than the set threshold, the analysis terminal 6 controls the emergency shut-off valve or the feed pump 7 to close, thereby stopping the current feed operation. The emergency shut-off valve or the feed pump 7 performs relevant operations according to the instructions of the analysis terminal 6.

[0020] Example 4, based on Example 3, as shown in Figure 2, analyzes the specific process of calculating the floating plate tilt angle using the terminal as follows: (1) After obtaining the height information of the floating plate 1 at the corresponding position of the magnetic ball level gauge 3, the terminal filters out the maximum and minimum height values. The points of the maximum and minimum height values ​​are on a straight line, and the straight line passes through the circle of the floating plate 1. The two are centrally symmetrically set; (2) Obtain the height difference Δh, that is, the maximum height - the minimum height = the height difference; (3) Solve for the tilt angle A of the floating plate 1, the expression is:

[0021] In the formula, r is the radius of the floating disk (1); since the diameter and height difference of the floating disk after it tilts can be used as the hypotenuse and a right side of a right triangle, the tilt angle A can be obtained by using the two.

Claims

1. An online monitoring and real-time protection device for the floating roof position of an oil and gas storage facility, comprising a floating roof (1), an emergency shut-off valve (7), and an inlet / outlet pump (8), wherein the floating roof (1) is installed inside the storage tank, the emergency shut-off valve (7) is installed at the inlet / outlet of the storage tank, and the inlet / outlet pump (8) is connected to the inlet / outlet of the storage tank, characterized in that, The upper surface of the floating plate (1) is provided with several strong magnetic floats (2) along its circumference. The outer wall of the storage tank is provided with several liquid level display and remote transmission units along its circumference. Each liquid level display and remote transmission unit is connected to a cloud data storage server (5). The cloud data storage server (5) is connected to an analysis terminal (6). The analysis terminal (6) is connected to an emergency shut-off valve (7) and an inlet / outlet pump (8).

2. The online monitoring and real-time protection device for the floating roof position of oil and gas storage facilities according to claim 1, characterized in that, Each of the liquid level display and remote transmission units includes a magnetic ball level gauge (3), which is connected to a reed switch remote transmitter (4). Both the magnetic ball level gauge (3) and the reed switch remote transmitter (4) are installed on the outer wall of the storage tank.

3. The online monitoring and real-time protection device for the floating roof position of oil and gas storage facilities according to claim 1, characterized in that, Several of the aforementioned strong magnetic floats (2) are arranged at equal intervals along the circumference of the float (1).

4. The online monitoring and real-time protection device for the floating roof position of oil and gas storage facilities according to claim 3, characterized in that, The number of liquid level display and remote transmission units is equal to the number of strong magnetic floats (2) and they are set in a one-to-one correspondence.

5. In the online monitoring and real-time protection device for the floating roof position of the oil and gas storage facility according to claim 2, the magnetic poles of the strong magnetic float (2) are opposite to the magnetic poles of the float in the magnetic ball level gauge (3).

6. A method for online monitoring and real-time protection of the floating roof position of oil and gas storage facilities, characterized in that, The online monitoring and real-time protection device for the floating roof position of the oil and gas storage facility as described in any one of claims 1 to 5 is used in the following process: the strong magnetic float (2) moves up and down with the floating roof (1). When the strong magnetic float (2) moves, it drives the float of the magnetic ball level gauge (3) corresponding to the strong magnetic float (2) to change position. The height of the floating roof (1) is displayed by the magnetic ball level gauge (3). The reed remote transmitter (4) sends the height information to the cloud data storage server (5). The cloud data storage server (5) sends the stored data to the analysis terminal to calculate the floating roof tilt angle. The calculated tilt angle is compared with the set threshold. If the tilt angle is greater than the threshold, the emergency shut-off valve (7) or the feed pump (8) is controlled to close.

7. The method for online monitoring and real-time protection of the floating roof position of oil and gas storage facilities according to claim 6, characterized in that, The specific process of the analysis terminal to calculate the floating roof tilt angle is as follows: (1) After the analysis terminal obtains the height information of the floating roof (1) at the corresponding position of the magnetic ball level gauge (3), the maximum height and the minimum height are selected; (2) Obtain the height difference Δh, that is, the maximum height - the minimum height = the height difference; (3) Solve for the floating roof (1) tilt angle A, the expression is: In the formula, r is the radius of the floating disk (1).

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