CN217503327U - Automatic control system for large LNG storage tank construction - Google Patents
Automatic control system for large LNG storage tank construction Download PDFInfo
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- CN217503327U CN217503327U CN202220572860.2U CN202220572860U CN217503327U CN 217503327 U CN217503327 U CN 217503327U CN 202220572860 U CN202220572860 U CN 202220572860U CN 217503327 U CN217503327 U CN 217503327U
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Abstract
The utility model discloses an automatic control system for large LNG storage tank construction, which comprises an automatic monitoring stage for gas jacking construction and an automatic control stage for pressure maintaining construction, wherein the automatic monitoring stage for gas jacking construction comprises a booster fan, an automatic control terminal for booster fan and an intelligent laser monitoring terminal for offset on the wall of a tank body, the booster fan is controlled by the automatic control terminal for booster fan, and a camera device is arranged on a tower crane beside the tank body; the automatic control stage of pressure maintaining construction comprises a pressure maintaining fan, an automatic control terminal of the pressure maintaining fan and intelligent air pressure monitoring equipment on the wall of the tank body, wherein the pressure maintaining fan is controlled by the automatic control terminal of the pressure maintaining fan. High-precision full-automatic control of the gas jacking construction process and full-automatic control of pressure maintaining construction of the tank body are realized.
Description
Technical Field
The utility model relates to a large-scale LNG storage tank construction control field, concretely relates to large-scale LNG storage tank construction automated control system.
Background
Large LNG storage tanks, i.e., large LNG storage tanks, are specialized products for storing LNG, special equipment, and three types of pressure vessels, and are generally constructed in places where people have little smoke or are convenient for shipping, such as seasides, ports, and gobi. The tank is generally a cylinder with a diameter of about one hundred meters and a height of several tens of meters. After the tank wall of the storage tank is constructed, the tank top spliced on the ground needs to be blown to the top of the tank wall through an air blower in a mode of blowing air from bottom to top, and the tank top is welded and fixed. The professional term of the process is called 'gas jacking', and the process is commonly called 'capping'. The air jacking is the most complex construction process in the whole tank construction process, and the measurement precision requirement is the highest. After the capping is finished, air needs to be continuously blown into the tank body through the blower for 24 hours, so that constant air pressure is always kept in the tank body for measuring the air tightness and the firmness of the tank body.
In the construction process of the existing air jacking, the rising data of the tank top is mainly recorded in a manual measurement and manual calculation mode, the rising data comprises rising height, residual distance, air pressure in the tank and the like, the data such as the deflection angle, the rotation angle and the like of the tank top cannot be measured, and the data can be roughly estimated only through a visual observation mode. When the tank top rises, the early warning cannot be performed through the measured data when the abnormal conditions occur. The manual measurement mode has the natural defects that the measurement difficulty is high, the data precision is low, the data is incomplete, the measurement is not timely, early warning cannot be timely performed and the like, and huge hidden dangers are brought to the construction safety and the construction quality. In the process of jacking the gas, the air inlet volume of the air blower needs to be controlled, and the rising speed of the tank top is strictly controlled. In the existing gas jacking process, a manager stands at the top of a tank wall, estimates the current lifting speed of the tank top in a visual observation mode, and then informs a ground blower operator to increase or decrease the gear of the blower through an interphone by virtue of experience to achieve the purpose of controlling the lifting speed of the tank top. The problems that speed estimation is inaccurate, communication is not timely, managers cannot know the actual running condition of the air blower in time and cannot accurately control the speed generally exist.
In the pressure maintaining process of the tank body, a person needs to be sent to stay beside the tank body for 24 hours and stares at the data of the barometer. If the air pressure in the tank is smaller than the standard constant value, the air blower needs to be opened immediately to blow air into the tank, the air pressure in the tank is increased, and after the air pressure reaches the standard constant value, the air blower needs to be closed immediately to prevent the air pressure in the tank from being increased. Workers need to continuously stay for 24 hours for one month, and a large amount of manpower and material resources are consumed. Moreover, if the pressure in the tank deviates from the standard constant value for too long, the construction of the whole pressure maintaining process fails.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem lie in providing a large-scale LNG storage tank construction automated control system. High-precision full-automatic control of the gas jacking construction process and full-automatic control of pressure maintaining construction of the tank body are realized.
The utility model provides a following technical scheme:
the automatic control system for the construction of the large LNG storage tank comprises an automatic monitoring stage for gas jacking construction and an automatic control stage for pressure maintaining construction, wherein the automatic monitoring stage for the gas jacking construction comprises a booster fan, an automatic control terminal for the booster fan and an offset laser intelligent monitoring terminal on the wall of a tank body, the booster fan is controlled by the automatic control terminal for the booster fan, camera equipment is arranged on a tower crane beside the tank body, the offset laser intelligent monitoring terminal transmits signals to first signal receiving equipment, and the first signal receiving equipment is electrically connected with a first notebook computer; the automatic control stage of pressurize construction includes pressurize fan, pressurize fan automatic control terminal and the intelligent atmospheric pressure monitoring facilities on the tank body wall, the pressurize fan is controlled by pressurize fan automatic control terminal, pressurize fan automatic control terminal and booster fan automatic control terminal give the second signal reception equipment with signal transmission, and second signal reception equipment is connected with the second notebook computer electricity.
Further, the camera equipment is connected with a first video network bridge, the first video network bridge is wirelessly transmitted with a second video network bridge, the second video network bridge is connected with a switch, the switch is electrically connected with the video recorder, the switch is transmitted with the video server through 5G, and the video server is connected with the automatic intelligent monitoring platform for the air jacking of the storage tank.
Compared with the prior art, the beneficial effects of the utility model are that:
the control system mainly solves two key construction steps of 'gas jacking' and 'pressure maintaining' which are the most complex in process, the highest in measurement precision requirement and the most in manpower and material resource consumption in the construction process of the large LNG storage tank.
The intelligent distance measuring equipment replaces the traditional manual measurement, so that the measurement is safer and the precision is higher; the air pressure inside and outside the tank is monitored more timely and more accurately; the equipment installation and software deployment are convenient and rapid, the resource occupation is less, and the safety and the pollution are avoided; the safety and the accuracy of control through the system are higher, so that the construction safety and the construction quality are higher guaranteed.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is the schematic diagram of the video monitoring structure of the present invention.
In the figure:
110. a tank body; 220. tower crane; 330. an automatic intelligent monitoring platform for gas jacking of the storage tank;
1. a booster fan; 2. the booster fan automatic control terminal; 3. an offset laser intelligent monitoring terminal; 4. a camera device; 5. a first signal receiving device; 6. a first notebook computer; 7. a pressure maintaining fan; 8. an automatic control terminal of the pressure maintaining fan; 9. intelligent air pressure monitoring equipment; 10. a second signal receiving device; 11. a second notebook computer; 12. a first video bridge; 13. a second video bridge; 14. a switch; 15. a video recorder; 16. and a video server.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Please refer to fig. 1-2, the utility model discloses an automatic control system for large-scale LNG storage tank construction, including the automatic monitoring stage of gas jacking construction and the automatic control stage of pressurize construction, the automatic monitoring stage of gas jacking construction includes booster fan 1, booster fan automatic control terminal 2, offset laser intelligent monitoring terminal 3 on the wall of the tank body 110, booster fan 1 is controlled by booster fan automatic control terminal 2, set up camera equipment 4 on the tower crane 220 next to the tank body 110, offset laser intelligent monitoring terminal 3 transmits the signal to first signal receiving equipment 5, first signal receiving equipment 5 is connected with first notebook computer 6 electricity;
the pressure maintaining construction automatic control stage comprises a pressure maintaining fan 7, a pressure maintaining fan automatic control terminal 8 and intelligent air pressure monitoring equipment 9 on the wall of the tank body 110, the pressure maintaining fan 7 is controlled by the pressure maintaining fan automatic control terminal 8, the pressure maintaining fan automatic control terminal 8 and the booster fan automatic control terminal 2 transmit signals to second signal receiving equipment 10, and the second signal receiving equipment 10 is electrically connected with a second notebook computer 11.
The booster fan automatic control terminal 2 can select a fan controller, the fan controller can select U8F2484L, and the air inlet volume of the air blower is controlled, so that the ascending speed of the tank top is controlled.
The offset laser intelligent monitoring terminal 3 is used for distance monitoring and can select a laser range finder.
The automatic control terminal 8 of the pressure maintaining fan can select a fan intelligent controller, the fan intelligent controller can select GYXF2000-1SF to control the fan to work, blast air into the tank and increase the air pressure in the tank.
The intelligent air pressure monitoring equipment 9 is an air pressure detector, and the air pressure detector can be DT-8920 to monitor an air pressure value.
As shown in fig. 2, the camera device 4 is connected to the first video bridge 12, the first video bridge 12 is wirelessly transmitted to the second video bridge 13, the second video bridge 13 is connected to the switch 14, the switch 14 is electrically connected to the video recorder 15, the switch 14 is transmitted to the video server 16 by 5G, and the video server 16 is connected to the automatic intelligent monitoring platform 330 for air-lifting of the storage tank.
An automatic control method for the construction of a large LNG storage tank mainly comprises a gas jacking stage and a pressure maintaining stage,
1. gas jacking stage
The automatic monitoring of the whole 'gas jacking' process takes control software as a core and various measuring devices as assistance. Before the 'gas jacking' is started, intelligent equipment for data measurement and blower control, including an offset laser intelligent monitoring terminal (for distance monitoring), an air pressure measuring device and a blower automatic control terminal, is deployed on the tank body and the blower. The eagle eye camera equipment is arranged at the tower crane or the high position beside the tank body, the overall appearance of the whole tank body can be shot, and the whole process of 'gas jacking' is recorded. Before the start of the "gas jacking", all equipment is deployed and started.
After the 'gas jacking' is started, the hardware equipment deployed on site starts to carry out continuous measurement, and transmits the measurement data back to the control software in real time. The control software calculates the average rising height, the maximum altitude difference, the rising speed, the average air pressure, the three-dimensional deflection angle of the tank top, the deviation of each measuring point and the average value, the horizontal rotation angle, the position of the height measuring point and the like in real time according to the received measuring data, and displays the data in a control software webpage in a three-dimensional simulation animation mode. Meanwhile, the eagle eye camera deployed on site can transmit the real-time picture back to the control software, and the control software can switch the simulation picture and the live-action picture.
Managers accessible control software knows the rising speed of tank deck and the operation gear condition of air-blower in real time, and the accessible is operated in control software, sends to fan control equipment and controls the instruction, reaches the purpose that increases or reduce air-blower operation gear, controls the air-blower intake to the rising speed of control tank deck can no longer need the air-blower operator to carry out manual operation.
The control software can not only log in through a computer end, but also log in through a mobile end, and check the real-time gas jacking condition and various monitoring data at any time and any place, for example, in the gas jacking process, abnormal data are found through measurement and calculation, operators can be automatically prompted in an audible and visual alarm mode, the abnormal condition is confirmed and processed, and the construction safety is ensured. Through the steps, high-precision and full-automatic control over the 'gas jacking' construction process is realized.
2. Pressure maintaining stage
Before the pressure maintaining construction of the tank body is started, firstly, air pressure monitoring equipment is deployed in the tank body, a 24-hour monitoring mode is started, an automatic pressure maintaining fan control terminal is deployed on a pressure maintaining fan, and then communication is established between control software and intelligent control equipment through network connection. The running gear of the fan can be set on the control software, and a standard constant air pressure value is set. The control software can be logged in through a computer terminal and also can be logged in through a mobile terminal.
After the pressure maintaining construction is started, the air pressure monitoring equipment in the tank body continuously transmits the air pressure data in the tank back to the control software for 24 hours, and the control software automatically compares the currently transmitted real-time air pressure value in the tank with the set standard constant air pressure value. If the current air pressure in the tank body is lower than the set standard constant air pressure value, the control software immediately sends an instruction to the fan control equipment to control the fan to start working, blows air into the tank, increases the air pressure in the tank, keeps a certain air pressure value, and cannot be lower than the set standard constant air pressure value. Meanwhile, the control software reports the current air pressure condition in the tank and the running condition of the blower to the manager in a message prompting mode. The manager can check the current air pressure reading in the tank body and the running condition of the blower at any time and any place through the mobile terminal. When the air pressure in the tank reaches the set standard constant air pressure value again, the control software sends an instruction to the fan control equipment to stop the fan and report the current air pressure value in the tank and the running condition of the fan to a manager.
Through the operation steps, the pressure maintaining construction can realize 24-hour unattended full-automatic control.
The control system mainly solves two key construction steps of 'gas jacking' and 'pressure maintaining' which are the most complex in process, the highest in measurement precision requirement and the most in manpower and material resource consumption in the construction process of the large LNG storage tank. The control system completely abandons the traditional manual measurement mode still applied in large scale at present, and adopts a mode of full-automatic control and combination of software and hardware. The advantages can be summarized as follows:
1, the intelligent distance measuring equipment replaces the traditional manual measurement, so that the measurement is safer and the precision is higher; the air pressure inside and outside the tank is monitored more timely and more accurately; the equipment installation and software deployment are convenient and fast, the resource occupation is less, and the method is safe and pollution-free.
2, a brand-new attitude measurement mode fills the data vacancy that the deflection attitude and the horizontal rotation of the tank top cannot be measured in the tank jacking process in the traditional measurement mode.
And 3, automatically calculating required final data according to the original measurement data, wherein the final data comprises data such as the rising speed of the tank top, the average height, the maximum height difference, the average air pressure and the like, and the final data is automatically calculated in real time.
4, a virtual and real combined display mode can be freely switched between a field monitoring picture and a three-dimensional tank body simulation picture.
All the operations of manual measurement and control are required before 5, and all the operations can be replaced by a system, so that the labor cost is reduced by more than 90%; the safety and the accuracy of control through the system are higher, so that the construction safety and the construction quality are higher guaranteed.
The data of the exchange work is exported automatically, the data is detailed and accurate, the manual input of data making is saved, and the trueness and the reliability of the data of the exchange work are improved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. Automatic control system of large-scale LNG storage tank construction, its characterized in that: the automatic monitoring stage of the gas jacking construction comprises a booster fan (1), a booster fan automatic control terminal (2) and an offset laser intelligent monitoring terminal (3) on the wall of a tank body (110), wherein the booster fan (1) is controlled by the booster fan automatic control terminal (2), a camera device (4) is arranged on a tower crane (220) beside the tank body (110), the offset laser intelligent monitoring terminal (3) transmits a signal to a first signal receiving device (5), and the first signal receiving device (5) is electrically connected with a first notebook computer (6); the automatic control stage of pressurize construction includes intelligent atmospheric pressure monitoring facilities (9) on pressurize fan (7), pressurize fan automatic control terminal (8) and jar body (110) wall, pressurize fan (7) are controlled by pressurize fan automatic control terminal (8), second signal reception equipment (10) are given with signal transmission to pressurize fan automatic control terminal (8) and booster fan automatic control terminal (2), and second signal reception equipment (10) are connected with second notebook computer (11) electricity.
2. The automated control system for large-scale LNG storage tank construction according to claim 1, wherein: the camera equipment (4) is connected with a first video bridge (12), the first video bridge (12) is wirelessly transmitted with a second video bridge (13), the second video bridge (13) is connected with a switch (14), the switch (14) is electrically connected with a video recorder (15), the switch (14) is transmitted with a video server (16) through 5G, and the video server (16) is connected with an automatic intelligent monitoring platform (330) for air jacking of the storage tank.
3. The automated control system for large-scale LNG storage tank construction according to claim 1, wherein: the booster fan automatic control terminal (2) selects a fan controller, the fan controller selects U8F2484L, and the air inlet volume of the air blower is controlled.
4. The automated control system for large-scale LNG storage tank construction according to claim 1, wherein: the offset laser intelligent monitoring terminal (3) is used for distance monitoring and selects a laser range finder.
5. The automated control system for large-scale LNG storage tank construction according to claim 1, wherein: and the automatic control terminal (8) of the pressure maintaining fan selects an intelligent fan controller, the intelligent fan controller selects GYXF2000-1SF, and the fan is controlled to blow air into the tank to maintain the air pressure in the tank.
6. The automated control system for large-scale LNG storage tank construction according to claim 1, wherein: the intelligent air pressure monitoring equipment (9) adopts an air pressure detector, the air pressure detector adopts DT-8920 to monitor an air pressure value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220572860.2U CN217503327U (en) | 2022-03-17 | 2022-03-17 | Automatic control system for large LNG storage tank construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220572860.2U CN217503327U (en) | 2022-03-17 | 2022-03-17 | Automatic control system for large LNG storage tank construction |
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| CN217503327U true CN217503327U (en) | 2022-09-27 |
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| CN202220572860.2U Active CN217503327U (en) | 2022-03-17 | 2022-03-17 | Automatic control system for large LNG storage tank construction |
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