A small-scale gas transmission station simulation device

Abstract

This invention relates to the field of gas transmission station technology, specifically to a small-scale gas transmission station simulation device, which includes an air compressor, an inlet main electric ball valve, a first main pipeline, a first backup pipeline, a second main pipeline, a second backup pipeline, an outlet main electric ball valve, and an outlet manual ball valve. The first main pipeline and the first backup pipeline are connected in parallel, and after being connected in parallel, they are connected to the inlet main electric ball valve. The second main pipeline and the second backup pipeline are connected in parallel, and the second main pipeline is connected to the first main pipeline and the outlet main electric ball valve. An outlet temperature transmitter and an outlet pressure transmitter are installed on the inlet pipe of the outlet main electric ball valve. This invention has a simple structure and low cost; furthermore, different functions can be simulated through different combinations of ball valves and pipelines, providing comprehensive simulation capabilities.

Description

Technical Field

[0001] The invention relates to the technical field of gas transmission stations, and in particular to a small-scale gas transmission station simulation device. Background Art

[0002] As the energy structure continues to advance towards a low-carbon transition, natural gas will occupy an increasingly important position in the primary energy consumption structure. The security capacity of natural gas pipelines is the cornerstone of the development of the natural gas industry. At present, my country has built a national natural gas pipeline network consisting of cross-border pipelines, trunk lines and regional connecting lines, inter-city pipelines within the province, urban gas distribution networks and large industrial direct supply pipelines. At present, my country has formed three major supply patterns of "across the east and west, across the north and south, and connecting abroad". However, the density of my country's natural gas trunk pipelines is far lower than the world average, and there is great potential for development. The rapid development of the pipeline industry will surely drive the continuous development of the oil and gas storage and transportation industry.

[0003] The gas transmission simulation device at the station is a centralized simulation device for gas transmission pipelines, gas sources, valve groups, transmitters, flow meters and their control systems, etc. It plays an extremely important role in the performance testing of gas transmission pipeline-related products and the simulation calculation and personnel training of related technologies. At present, most gas transmission station simulation devices are built in petroleum colleges or petroleum research institutes, but they all have problems such as not being consistent with the actual site, only being able to simulate part of the gas transmission process at the station, aging equipment, low degree of automation control, and insufficient measurement accuracy.

[0004] The patent with application number CN200620153519.4 discloses a pipeline gas transmission simulation device, including pipelines, gas storage tanks, compressor rooms and valves. The device is characterized in that a multi-layer mode is adopted in the construction of the gas transmission pipeline. The process pipeline is divided into four layers from top to bottom, each layer is four rows of pipelines, and the pipeline length is more than 2,000 meters; the valve group is composed of ball valves, check valves, safety shut-off valves, etc.; in terms of operation, manual operation and manual recording are performed by using the actual data display function of the measurement and control instrument, and microcomputer control, data monitoring and collection are performed by using the SCADA control system. Since the simulation device adopts a four-layer structure that is relatively complex, the cost is extremely high, it has a large footprint and is complex to install; in addition, since the SCADA software used is relatively old and is a foreign product, it does not meet the requirements of the current localization environment. Therefore, in order to continuously meet the gas transmission needs of natural gas stations, an advanced small-scale gas transmission station simulation device is urgently needed. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a small-scale gas transmission station simulation device, which solves the technical problems of complex structure, high cost and incomplete simulation function.

[0006] The technical solution of the present invention to solve the above technical problems is as follows: a small gas transmission station simulation device, including an air compressor, an inlet main electric ball valve, a first main pipeline, a first backup pipeline, a second main pipeline, a second backup pipeline, an outlet main electric ball valve and an outlet manual ball valve; the outlet of the air compressor is connected to the inlet of the inlet main electric ball valve through a pipeline, the first main pipeline is connected in parallel with the first backup pipeline, and the inlet of the first main pipeline and the first backup pipeline in parallel is connected to the outlet of the inlet main electric ball valve through a pipeline, the second main pipeline is connected in parallel with the second backup pipeline, and the second main pipeline is connected to the second backup pipeline. The parallel inlet is connected to the outlet of the first main line and the first backup line in parallel through a pipeline, the outlet of the second main line and the second backup line in parallel is connected to the inlet of the outlet main electric ball valve through a pipeline, and the outlet of the outlet main electric ball valve is connected to the inlet of the outlet manual ball valve; the outlet of the inlet main electric ball valve is also connected to the inlet of the outlet main electric ball valve through a pipeline; an inlet total temperature transmitter and an inlet total pressure transmitter are provided on the outlet pipeline of the inlet main electric ball valve; an outlet total temperature transmitter and an outlet total pressure transmitter are provided on the inlet pipeline of the outlet main electric ball valve.

[0007] Based on the above technical solution, the present invention can also be improved as follows.

[0008] Further, the first main line includes a first electric ball valve of the main channel, a first pressure transmitter of the main channel, a second pressure transmitter of the main channel and a main channel ultrasonic flowmeter; the inlet of the first electric ball valve of the main channel is connected with the outlet of the inlet main electric ball valve through a pipeline, the outlet of the first electric ball valve of the main channel is connected with the inlet of the main channel ultrasonic flowmeter through a pipeline, the first pressure transmitter of the main channel is arranged on the pipeline connecting the outlet of the first electric ball valve of the main channel and the inlet of the main channel ultrasonic flowmeter, and the second pressure transmitter of the main channel is arranged on the outlet pipeline of the main channel ultrasonic flowmeter.

[0009] Further, the first spare pipeline includes a first electric ball valve for a spare channel, a first pressure transmitter for a spare channel, a second pressure transmitter for a spare channel and an ultrasonic flowmeter for a spare channel; the inlet of the first electric ball valve for the spare channel is connected to the outlet of the inlet main electric ball valve through a pipeline, the outlet of the first electric ball valve for the spare channel is connected to the inlet of the ultrasonic flowmeter for the spare channel through a pipeline, the first pressure transmitter for the spare channel is arranged on the pipeline connecting the outlet of the first electric ball valve for the spare channel and the inlet of the ultrasonic flowmeter for the spare channel, and the second pressure transmitter for the spare channel is arranged on the outlet pipeline of the ultrasonic flowmeter for the spare channel.

[0010] Further, the second main line includes a main channel third pressure transmitter, a main channel self-operated regulating valve and a main channel second electric ball valve; the inlet of the main channel self-operated regulating valve is connected to the outlet of the main channel ultrasonic flowmeter through a pipeline, the outlet of the main channel self-operated regulating valve is connected to the inlet of the main channel second electric ball valve through a pipeline, the outlet of the main channel second electric ball valve is connected to the inlet of the outlet main electric ball valve through a pipeline, and the main channel third pressure transmitter is arranged on a pipeline connecting the outlet of the main channel self-operated regulating valve and the inlet of the main channel second electric ball valve.

[0011] Further, the second backup pipeline includes a third pressure transmitter for a backup channel, a self-operated regulating valve for a backup channel, and a second electric ball valve for a backup channel; the inlet of the self-operated regulating valve for the backup channel is connected to the outlet of the ultrasonic flowmeter for the backup channel through a pipeline, the outlet of the self-operated regulating valve for the backup channel is connected to the inlet of the second electric ball valve for the backup channel through a pipeline, the outlet of the second electric ball valve for the backup channel is connected to the inlet of the outlet main electric ball valve through a pipeline, and the third pressure transmitter for the backup channel is arranged on a pipeline connecting the outlet of the self-operated regulating valve for the backup channel and the inlet of the second electric ball valve for the backup channel.

[0012] Furthermore, it also includes a mounting frame, which has an upper and lower double-layer structure; the air compressor, the first pressure transmitter of the main channel, the first pressure transmitter of the spare channel, the second pressure transmitter of the main channel, the second pressure transmitter of the spare channel, the main channel ultrasonic flowmeter, the spare channel ultrasonic flowmeter, the total temperature transmitter, the inlet total pressure transmitter, the main channel third pressure transmitter, the spare channel third pressure transmitter, the outlet total temperature transmitter and the outlet total pressure transmitter are all installed in the upper structure of the mounting frame; the inlet total electric ball valve, the main channel first electric ball valve, the spare channel first electric ball valve, the main channel self-operated regulating valve, the spare channel self-operated regulating valve, the main channel second electric ball valve, the spare channel second electric ball valve, the outlet total electric ball valve and the outlet manual ball valve are all installed in the lower structure of the mounting frame.

[0013] Furthermore, it also includes a rack, on which a PLC cabinet, a touch screen, a PCS server and a workstation are installed, and the PLC cabinet is electrically connected to the touch screen, the workstation and the PCS server respectively; the air compressor, the inlet main electric ball valve, the main channel first electric ball valve, the spare channel first electric ball valve, the main channel first pressure transmitter, the spare channel first pressure transmitter, the main channel second pressure transmitter, the spare channel second pressure transmitter, the main channel ultrasonic flowmeter, the spare channel ultrasonic flowmeter, the total temperature transmitter, the inlet total pressure transmitter, the main channel third pressure transmitter, the spare channel third pressure transmitter, the outlet total temperature transmitter and the outlet total pressure transmitter, the main channel self-operated regulating valve, the spare channel self-operated regulating valve, the main channel second electric ball valve, the spare channel second electric ball valve and the outlet main electric ball valve are all connected to the PLC cabinet.

[0014] Furthermore, the pipeline composed of the air compressor, the inlet main electric ball valve, the first main line, the second main line, the outlet main electric ball valve and the outlet manual ball valve is used to realize the positive flow function; the pipeline composed of the air compressor, the inlet main electric ball valve, the first backup line, the second backup line, the outlet main electric ball valve and the outlet manual ball valve is used to realize the redundant flow function.

[0015] Furthermore, the pipeline formed by the air compressor, the inlet main electric ball valve, the outlet main electric ball valve and the outlet manual ball valve is used to realize the cross-station process function.

[0016] Furthermore, the pipeline formed by the air compressor, the inlet main electric ball valve, the first spare pipeline, the second spare pipeline, and the outlet main electric ball valve is used to realize the distribution process function.

[0017] The beneficial effects of the present invention are as follows: a small gas transmission station simulation device of the present invention is composed of an air compressor, an inlet main electric ball valve, a first main line, a first spare pipeline, a second main line, a second spare pipeline, an outlet main electric ball valve and an outlet manual ball valve, and has a simple structure and low cost; in addition, different functions can be simulated through different ball valve and pipeline combinations, and the simulation functions are complete. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural block diagram of a small-scale gas transmission station simulation device of the present invention;

[0019] Figure 2 The figure is a schematic diagram of the pipeline structure of a small-scale gas transmission station simulation device of the present invention.

[0020] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0021] 1. Air compressor; 2. Inlet main electric ball valve; 3. First electric ball valve of main channel; 4. First electric ball valve of spare channel; 5. First pressure transmitter of main channel; 6. First pressure transmitter of spare channel; 7. Second pressure transmitter of main channel; 8. Second pressure transmitter of spare channel; 9. Ultrasonic flowmeter of main channel; 10. Ultrasonic flowmeter of spare channel; 11. Total temperature transmitter; 12. Inlet total pressure transmitter; 13. Third pressure transmitter of main channel; 14. Third pressure transmitter of spare channel; 15. Total temperature transmitter of outlet; 16. Total pressure transmitter of outlet; 17. Self-operated regulating valve of main channel; 18. Self-operated regulating valve of spare channel; 19. Second electric ball valve of main channel; 20. Second electric ball valve of spare channel; 21. Total electric ball valve of outlet; 22. Manual ball valve of outlet. DETAILED DESCRIPTION

[0022] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0023] like Figure 1 As shown, a small gas transmission station simulation device includes an air compressor 1, an inlet main electric ball valve 2, a first main pipeline, a first backup pipeline, a second main pipeline, a second backup pipeline, an outlet main electric ball valve 21 and an outlet manual ball valve 22; the outlet of the air compressor 1 is connected to the inlet of the inlet main electric ball valve 2 through a pipeline, the first main pipeline is connected in parallel with the first backup pipeline, and the inlet of the first main pipeline and the first backup pipeline in parallel is connected to the outlet of the inlet main electric ball valve 2 through a pipeline, the second main pipeline is connected in parallel with the second backup pipeline, and the inlet of the second main pipeline and the second backup pipeline in parallel is connected to the outlet of the inlet main electric ball valve 2 through a pipeline. A main pipeline is connected in parallel with the outlet of the first backup pipeline, and the outlet of the second main pipeline is connected in parallel with the second backup pipeline and is connected to the inlet of the outlet main electric ball valve 21 through a pipeline, and the outlet of the outlet main electric ball valve 21 is connected to the inlet of the outlet manual ball valve 22; the outlet of the inlet main electric ball valve 2 is also connected to the inlet of the outlet main electric ball valve 21 through a pipeline; the outlet pipeline of the inlet main electric ball valve 2 is provided with an inlet total temperature transmitter 11 and an inlet total pressure transmitter 12; the inlet pipeline of the outlet main electric ball valve 21 is provided with an outlet total temperature transmitter 15 and an outlet total pressure transmitter 16.

[0024] In this specific embodiment, Figure 2As shown: the first main pipeline includes a first electric ball valve 3 of the main channel, a first pressure transmitter 5 of the main channel, a second pressure transmitter 7 of the main channel and a main channel ultrasonic flowmeter 9; the inlet of the first electric ball valve 3 of the main channel is connected with the outlet of the inlet main electric ball valve 2 through a pipeline, the outlet of the first electric ball valve 3 of the main channel is connected with the inlet of the main channel ultrasonic flowmeter 9 through a pipeline, the first pressure transmitter 5 of the main channel is arranged on the pipeline connecting the outlet of the first electric ball valve 3 of the main channel and the inlet of the main channel ultrasonic flowmeter 9, and the second pressure transmitter 7 of the main channel is arranged on the outlet pipeline of the main channel ultrasonic flowmeter 9. The first spare pipeline includes a first electric ball valve 4 for a spare channel, a first pressure transmitter 6 for a spare channel, a second pressure transmitter 8 for a spare channel and an ultrasonic flowmeter 10 for a spare channel; the inlet of the first electric ball valve 4 for the spare channel is connected to the outlet of the inlet main electric ball valve 2 through a pipeline, the outlet of the first electric ball valve 4 for the spare channel is connected to the inlet of the ultrasonic flowmeter 10 for the spare channel through a pipeline, the first pressure transmitter 6 for the spare channel is arranged on the pipeline connecting the outlet of the first electric ball valve 4 for the spare channel and the inlet of the ultrasonic flowmeter 10 for the spare channel, and the second pressure transmitter 8 for the spare channel is arranged on the outlet pipeline of the ultrasonic flowmeter 10 for the spare channel. The second main line includes a main channel third pressure transmitter 13, a main channel self-operated regulating valve 17 and a main channel second electric ball valve 19; the inlet of the main channel self-operated regulating valve 17 is connected to the outlet of the main channel ultrasonic flowmeter 9 through a pipeline, the outlet of the main channel self-operated regulating valve 17 is connected to the inlet of the main channel second electric ball valve 19 through a pipeline, the outlet of the main channel second electric ball valve 19 is connected to the inlet of the outlet main electric ball valve 21 through a pipeline, and the main channel third pressure transmitter 13 is arranged on a pipeline connecting the outlet of the main channel self-operated regulating valve 17 and the inlet of the main channel second electric ball valve 19. The second spare pipeline includes a spare channel third pressure transmitter 14, a spare channel self-operated regulating valve 18 and a spare channel second electric ball valve 20; the inlet of the spare channel self-operated regulating valve 18 is connected to the outlet of the spare channel ultrasonic flowmeter 10 through a pipeline, the outlet of the spare channel self-operated regulating valve 18 is connected to the inlet of the spare channel second electric ball valve 20 through a pipeline, the outlet of the spare channel second electric ball valve 20 is connected to the inlet of the outlet main electric ball valve 21 through a pipeline, and the spare channel third pressure transmitter 14 is arranged on a pipeline connecting the outlet of the spare channel self-operated regulating valve 18 and the inlet of the spare channel second electric ball valve 20.

[0025] Specifically, the present invention uses compressed air generated by an air compressor as the gas source to simulate the natural gas in the long-distance pipeline, uses a Φ63.5 304 stainless steel pipe as the gas pipeline, and installs an actuator on the ball valve to realize automatic remote control, simulating the large-caliber and high-torque ball valve in the station field. By installing an electric actuator on a small regulating valve, the electric actuator can realize remote and local control, and can also realize valve position control, so as to simulate the actual electric regulating valve function of the station field, and installs a pressure transmitter, a temperature transmitter and a flow meter at the corresponding position to simulate the actual station field remote transmission instrument function. The present invention can not only simulate a small station field pipeline gas transmission process, but also simulate the necessary working conditions during the station field PID adjustment, and can simultaneously perform manual and automatic triggering modes.

[0026] In this specific embodiment: it also includes a mounting frame, which is an upper and lower double-layer structure; the air compressor 1, the main channel first pressure transmitter 5, the standby channel first pressure transmitter 6, the main channel second pressure transmitter 7, the standby channel second pressure transmitter 8, the main channel ultrasonic flowmeter 9, the standby channel ultrasonic flowmeter 10, the total temperature transmitter 11, the inlet total pressure transmitter 12, the main channel third pressure transmitter 13, the standby channel third pressure transmitter 14, The outlet total temperature transmitter 15 and the outlet total pressure transmitter 16 are both installed in the upper structure of the mounting frame; the inlet total electric ball valve 2, the main channel first electric ball valve 3, the spare channel first electric ball valve 4, the main channel self-operated regulating valve 17, the spare channel self-operated regulating valve 18, the main channel second electric ball valve 19, the spare channel second electric ball valve 20, the outlet total electric ball valve 21 and the outlet manual ball valve 22 are all installed in the lower structure of the mounting frame.

[0027] The present invention is composed of pipelines, air compressors, valve groups, transmitters, and flow meters. The valve group is composed of electric ball valves and regulating valves. In order to reduce the footprint of the device, the mounting frame adopts an upper and lower double-layer design, using stainless steel plates as the bottom plates of the upper and lower layers; the upper layer is the metering area, and the lower layer is the pressure regulating area, which is convenient for operation.

[0028] In this specific embodiment: the present invention also includes a rack, on which a PLC cabinet, a touch screen, a PCS server and a workstation are installed, and the PLC cabinet is electrically connected to the touch screen, the workstation and the PCS server respectively; the air compressor 1, the inlet main electric ball valve 2, the main channel first electric ball valve 3, the standby channel first electric ball valve 4, the main channel first pressure transmitter 5, the standby channel first pressure transmitter 6, the main channel second pressure transmitter 7, the standby channel second pressure transmitter 8, the main The channel ultrasonic flowmeter 9, the standby channel ultrasonic flowmeter 10, the total temperature transmitter 11, the inlet total pressure transmitter 12, the main channel third pressure transmitter 13, the standby channel third pressure transmitter 14, the outlet total temperature transmitter 15 and the outlet total pressure transmitter 16, the main channel self-operated regulating valve 17, the standby channel self-operated regulating valve 18, the main channel second electric ball valve 19, the standby channel second electric ball valve 20 and the outlet total electric ball valve 21 are all connected to the PLC cabinet.

[0029] The rack is set up next to the installation frame, with PLC cabinets, touch screens, PCS servers and workstations on it, simulating the automatic control system in the station, making the simulation experiment effect more realistic and the measured data closer to the actual gas transmission situation.

[0030] Specifically, the overall gas transmission process is provided by the air compressor, which passes through the flow meter after filtering and is finally discharged into the atmosphere after the valve regulating valve flow meter. In terms of the station PID adjustment working condition, the transmitter value and the self-acting regulating valve can be logically interlocked through the algorithm pre-designed by the software, thereby controlling the pressure and temperature at the outlet. In terms of operation, the actual data display function of the measurement and control instrument is used for operation and recording, and the PCS control system is used for program self-control, data monitoring and collection. Through the switching of different valves, the processes of positive transmission, over-station transmission, and sub-transmission can be realized; the PCS control system is composed of a power unit, a PLC cabinet, a control cable, a pressure transmitter, a temperature transmitter, a PCS server, a workstation, etc., which mainly displays various process parameters on-site and transmits the signal to a touch screen remotely. The host computer can directly control the process flow and read the process parameters. The present invention links together various links in the gas transmission, storage and transportation industry, and can carry out many process experiments in the industry, thereby avoiding repeated investment in equipment and instruments; through advanced PCS control system data collection and monitoring, the accuracy of the obtained experimental data is improved, and the accuracy of research results is guaranteed; the present invention will play an important role in practical teaching and scientific research. The present invention has a wide range of applicability, and can be used to simulate gas pipeline transportation, distribution and transmission processes, and PID adjustment conditions.

[0031] In this specific real-time example: the pipeline composed of the air compressor 1, the inlet main electric ball valve 2, the first main line, the second main line, the outlet main electric ball valve 21 and the outlet manual ball valve 22 is used to realize the forward transmission process function. The pipeline composed of the air compressor 1, the inlet main electric ball valve 2, the first backup line, the second backup line, the outlet main electric ball valve 21 and the outlet manual ball valve 22 is used to realize the redundant process function. The pipeline composed of the air compressor 1, the inlet main electric ball valve 2, the outlet main electric ball valve 21 and the outlet manual ball valve 22 is used to realize the cross-station process function. The pipeline composed of the air compressor 1, the inlet main electric ball valve 2, the first backup line, the second backup line, the outlet main electric ball valve 21 is used to realize the distribution process function.

[0032] Specific:

[0033] Positive transmission process: the air compressor 1 is used as the air source, after passing through the inlet main electric ball valve 2, it passes through the main channel first electric ball valve 3, and after filtration, it passes through the main channel ultrasonic flow meter 9, and after being controlled by the main channel self-operated regulating valve 17, it passes through the main channel second electric ball valve 19, and finally the outlet manual ball valve 22 is exported to the atmosphere.

[0034] Redundant process: The air compressor 1 is used as the air source. After passing through the inlet main electric ball valve 2, it passes through the first electric ball valve 4 of the backup channel, is filtered, passes through the backup channel ultrasonic flow meter 10, is controlled by the backup channel self-operated regulating valve 18, passes through the backup channel second electric ball valve 20, and is finally exported to the atmosphere through the outlet manual ball valve 22.

[0035] Cross-station process: The air compressor 1 is used as the air source. After passing through the inlet main electric ball valve 2, the outlet main electric ball valve 21 is opened, the first electric ball valve 3 of the main channel and the first electric ball valve 4 of the backup channel are closed, and finally the air is exported to the atmosphere through the outlet manual ball valve 22.

[0036] Distribution process: The air compressor 1 is used as the air source. After passing through the inlet main electric ball valve 2, the first electric ball valve 4 of the spare channel, after filtering, it passes through the spare channel ultrasonic flow meter 10, is controlled by the spare channel self-operated regulating valve 18, passes through the spare channel second electric ball valve 20, and finally passes through the outlet main electric ball valve 21 to the downstream users. The flow rate and flow rate can be freely adjusted according to user needs.

[0037] The present invention can be mainly used for:

[0038] 1. Training: The main purpose is to provide automation training for the entire life cycle of the gas pipeline control system. It can focus on intermediate and advanced knowledge training of the automation system. Different key courses can be set in each cycle of the automation system to fully cover the training needs of station technicians, while taking into account basic knowledge training of the automation system and technical training of other majors. Through training, we can further understand the metering and distribution process of small gas transmission stations, and complete the flow control and pressure control of downstream users through PID adjustment. Under the general trend of localization, we will learn the operation and use of domestic software and foreign software and compare their differences.

[0039] 2. Product testing: The present invention can be used to create an environment in the laboratory that is completely consistent with the actual on-site environment for gas transmission station application products, and obtain accurate test data. The test records can be analyzed later to further optimize the functionality, practicality, and reliability of the product. Taking the basic function test of PLC as an example, the gas transmission simulation platform is used to simulate the on-site equipment, test the control performance of the tested PLC, and display the control effect through the human-computer interface to verify the sensitivity and reliability of the product. In addition, the functionality of the tested software and other commonly used software in other stations can be compared and tested. Such as software (redundant switching of gas transmission process) testing, equipment (control valves, actuators) testing, etc.

[0040] The present invention utilizes a relatively small space to simulate a long-distance natural gas pipeline transmission station, miniaturizes the transmission station, and uses compressed air generated by a small air compressor as a gas source. The gas source pressure is 150-300 kPa, which can simulate and realize various process control functions of the station, realize automatic distribution function, and simplify the distribution control difficulty of downstream users. The low pressure will not cause significant harm to personnel, and the exhaust of gas to air will not cause environmental pollution, thus meeting the safety and environmental protection requirements.

[0041] The present invention completely simulates the actual metering and distribution conditions of a gas transmission station, and can be used as a training base to conduct systematic automated training and product testing for multiple people at the same time, obtain test result feedback in real time, save time and cost without affecting the normal operation of the actual station, and ensure production safety.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A small-scale gas transmission station simulation device, characterized in that: The invention comprises an air compressor (1), an inlet main electric ball valve (2), a first main pipeline, a first backup pipeline, a second main pipeline, a second backup pipeline, an outlet main electric ball valve (21) and an outlet manual ball valve (22); the outlet of the air compressor (1) is connected to the inlet of the inlet main electric ball valve (2) through a pipeline, the first main pipeline is connected in parallel with the first backup pipeline, and the inlet of the first main pipeline and the first backup pipeline connected in parallel is connected to the outlet of the inlet main electric ball valve (2) through a pipeline, the second main pipeline is connected in parallel with the second backup pipeline, and the inlet of the second main pipeline and the second backup pipeline connected in parallel is connected to the outlet of the first main pipeline and the first backup pipeline through a pipeline. The outlets after parallel connection are connected, the outlets after the second main pipeline and the second backup pipeline are connected in parallel are connected to the inlet of the outlet main electric ball valve (21) through a pipeline, and the outlet of the outlet main electric ball valve (21) is connected to the inlet of the outlet manual ball valve (22); the outlet of the inlet main electric ball valve (2) is also connected to the inlet of the outlet main electric ball valve (21) through a pipeline; the outlet pipeline of the inlet main electric ball valve (2) is provided with an inlet total temperature transmitter (11) and an inlet total pressure transmitter (12); the inlet pipeline of the outlet main electric ball valve (21) is provided with an outlet total temperature transmitter (15) and an outlet total pressure transmitter (16); The pipeline formed by the air compressor (1), the inlet main electric ball valve (2), the first main pipeline, the second main pipeline, the outlet main electric ball valve (21) and the outlet manual ball valve (22) is used to realize a positive flow function; the pipeline formed by the air compressor (1), the inlet main electric ball valve (2), the first backup pipeline, the second backup pipeline, the outlet main electric ball valve (21) and the outlet manual ball valve (22) is used to realize a redundant flow function; The pipeline formed by the air compressor (1), the inlet main electric ball valve (2), the outlet main electric ball valve (21) and the outlet manual ball valve (22) is used to realize the cross-station process function; The pipeline formed by the air compressor (1), the inlet main electric ball valve (2), the first spare pipeline, the second spare pipeline, and the outlet main electric ball valve (21) is used to realize a distribution flow function.

2. The small-scale gas transmission station simulation device according to claim 1 is characterized in that: The first main pipeline comprises a first electric ball valve (3) of the main channel, a first pressure transmitter (5) of the main channel, a second pressure transmitter (7) of the main channel and an ultrasonic flowmeter (9) of the main channel; the inlet of the first electric ball valve (3) of the main channel is connected to the outlet of the inlet main electric ball valve (2) through a pipeline, the outlet of the first electric ball valve (3) of the main channel is connected to the inlet of the ultrasonic flowmeter (9) of the main channel through a pipeline, the first pressure transmitter (5) of the main channel is arranged on the pipeline connecting the outlet of the first electric ball valve (3) of the main channel and the inlet of the ultrasonic flowmeter (9) of the main channel, and the second pressure transmitter (7) of the main channel is arranged on the outlet pipeline of the ultrasonic flowmeter (9) of the main channel.

3. The small-scale gas transmission station simulation device according to claim 2 is characterized in that: The first standby pipeline comprises a first electric ball valve (4) of a standby channel, a first pressure transmitter (6) of a standby channel, a second pressure transmitter (8) of a standby channel and an ultrasonic flowmeter (10) of a standby channel; the inlet of the first electric ball valve (4) of the standby channel is connected to the outlet of the inlet main electric ball valve (2) through a pipeline, the outlet of the first electric ball valve (4) of the standby channel is connected to the inlet of the ultrasonic flowmeter (10) of the standby channel through a pipeline, the first pressure transmitter (6) of the standby channel is arranged on the pipeline connecting the outlet of the first electric ball valve (4) of the standby channel and the inlet of the ultrasonic flowmeter (10) of the standby channel, and the second pressure transmitter (8) of the standby channel is arranged on the outlet pipeline of the ultrasonic flowmeter (10) of the standby channel.

4. The small-scale gas transmission station simulation device according to claim 3 is characterized in that: The second main pipeline comprises a third pressure transmitter (13) of the main channel, a self-operated regulating valve (17) of the main channel and a second electric ball valve (19) of the main channel; the inlet of the self-operated regulating valve (17) of the main channel is connected to the outlet of the ultrasonic flow meter (9) of the main channel through a pipeline, the outlet of the self-operated regulating valve (17) of the main channel is connected to the inlet of the second electric ball valve (19) of the main channel through a pipeline, the outlet of the second electric ball valve (19) of the main channel is connected to the inlet of the outlet main electric ball valve (21) through a pipeline, and the third pressure transmitter (13) of the main channel is arranged on a pipeline connecting the outlet of the self-operated regulating valve (17) of the main channel and the inlet of the second electric ball valve (19) of the main channel.

5. The small-scale gas transmission station simulation device according to claim 4 is characterized in that: The second backup pipeline comprises a backup channel third pressure transmitter (14), a backup channel self-operated regulating valve (18) and a backup channel second electric ball valve (20); the inlet of the backup channel self-operated regulating valve (18) is connected to the outlet of the backup channel ultrasonic flowmeter (10) through a pipeline, the outlet of the backup channel self-operated regulating valve (18) is connected to the inlet of the backup channel second electric ball valve (20) through a pipeline, the outlet of the backup channel second electric ball valve (20) is connected to the inlet of the outlet main electric ball valve (21) through a pipeline, and the backup channel third pressure transmitter (14) is arranged on a pipeline connecting the outlet of the backup channel self-operated regulating valve (18) and the inlet of the backup channel second electric ball valve (20).

6. The small-scale gas transmission station simulation device according to claim 5 is characterized in that: The system also includes a mounting frame, wherein the mounting frame is a double-layer structure of upper and lower layers; the air compressor (1), the first pressure transmitter (5) of the main channel, the first pressure transmitter (6) of the standby channel, the second pressure transmitter (7) of the main channel, the second pressure transmitter (8) of the standby channel, the main channel ultrasonic flowmeter (9), the standby channel ultrasonic flowmeter (10), the total temperature transmitter (11), the inlet total pressure transmitter (12), the main channel third pressure transmitter (13), the standby channel third pressure transmitter (14), the outlet The total temperature transmitter (15) and the outlet total pressure transmitter (16) are both installed in the upper structure of the mounting frame; the inlet total electric ball valve (2), the main channel first electric ball valve (3), the backup channel first electric ball valve (4), the main channel self-operated regulating valve (17), the backup channel self-operated regulating valve (18), the main channel second electric ball valve (19), the backup channel second electric ball valve (20), the outlet total electric ball valve (21) and the outlet manual ball valve (22) are all installed in the lower structure of the mounting frame.

7. The small-scale gas transmission station simulation device according to claim 5 is characterized in that: The system also includes a rack, on which a PLC cabinet, a touch screen, a PCS server and a workstation are installed, and the PLC cabinet is electrically connected to the touch screen, the workstation and the PCS server respectively; the air compressor (1), the inlet main electric ball valve (2), the main channel first electric ball valve (3), the standby channel first electric ball valve (4), the main channel first pressure transmitter (5), the standby channel first pressure transmitter (6), the main channel second pressure transmitter (7), the standby channel second pressure transmitter (8), the main channel ultrasonic flowmeter (9) , the standby channel ultrasonic flow meter (10), the total temperature transmitter (11), the inlet total pressure transmitter (12), the main channel third pressure transmitter (13), the standby channel third pressure transmitter (14), the outlet total temperature transmitter (15) and the outlet total pressure transmitter (16), the main channel self-operated regulating valve (17), the standby channel self-operated regulating valve (18), the main channel second electric ball valve (19), the standby channel second electric ball valve (20) and the outlet total electric ball valve (21) are all connected to the PLC cabinet.

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