Large-flow high-pressure fuel gas pre-charging control system

Abstract

The utility model relates to a high-flow high-pressure fuel gas pre-charging control system in the field of automatic control systems. Comprising a flowmeter base meter, a flow computer, a CPU (central processing unit) card controller, an industrial control computer, a programmable logic controller, a data collector, a valve electric actuator, a UPS (uninterrupted power supply), a power monitor, an indicator lamp, a VGA (video graphics array)-to-optical fiber transceiver, a central control room display screen, a pre-charging control cabinet and a flow computer cabinet. The flowmeter base meter is installed on a gas pipeline and connected with the flow computer. And the flow computer is arranged on the flow computer cabinet body and is connected with the CPU card in a control manner. And the CPU card controller is arranged on the pre-charging control cabinet body and is connected with the industrial control computer. And the industrial control computer is also connected with a programmable logic controller, a data collector and a VGA (Video Graphics Array)-to-optical fiber transmitter. And the programmable logic controller is also connected with the valve electric actuating mechanism, the indicating lamp and the power supply monitor. The valve electric actuator is installed on the gas pipeline valve, executes the operation of opening and closing the gas pipeline valve of the programmable logic controller and drives the gas pipeline valve to be opened and closed. The data collector is connected with the background management system in a wireless mode and monitors the operation condition of the gas pre-charging system in real time. The VGA-to-optical fiber transmitter is connected with the VGA-to-optical fiber receiver through an optical fiber, the VGA-to-optical fiber receiver is connected with a display screen of a central control room of a user, and information such as instantaneous gas volume, accumulated gas volume, residual amount and valve state of the pre-charging control system is displayed on the display screen of the user. The utility model relates to a comprehensive intelligent management system which is researched and developed for high-flow high-pressure gas users and comprises metering, billing, arrearage, power-down valve closing and data remote monitoring, and pre-charging management and control are carried out on the high-flow high-pressure gas users.

Description

Technical Field

[0001] The utility model relates to the field of automatic control, and in particular provides a large-flow and high-pressure gas pre-charge control system. Background Art

[0002] The pressure of urban gas pipelines is above 0.4MPa, which is sub-high pressure, and above 1.6MPa, which is high pressure. Usually, the pipeline diameter is above 200mm, which is called large-flow high-pressure gas users, and the gas consumption is large. However, the current pre-paid industrial flowmeter is only suitable for low-pressure and medium-pressure. The existing large-user pre-paid system also has the problem that the valve is not closed when the power is off, the user's gas consumption is not measured, and the data cannot be uploaded to the user's control room. One system cannot process the data of 2 or 3 flow meter base meters and flow computers at the same time, and cannot control 2 or 3 valves. Summary of the invention

[0003] The purpose of the utility model is to provide a large-flow and high-pressure gas pre-charging control system to solve the defects of the above-mentioned prior art.

[0004] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is:

[0005] A large-flow, high-pressure gas pre-charge control system, characterized in that it includes a flow meter base, a flow computer, a CPU card control, an industrial control computer, a programmable logic controller, a data acquisition device, a valve electric actuator, a power switch, a UPS, a power monitor, an indicator light, a VGA to optical fiber transceiver, a pre-charge control cabinet, and a flow computer cabinet. The flow meter base is installed on the gas pipeline, and the gas is measured under working conditions, and the temperature and pressure are measured, and it is connected to the flow computer by a wire. The flow computer is installed on the flow computer cabinet, collects the working condition flow, temperature, and pressure of the flow meter base, and is connected to the CPU card control through a twisted pair. The CPU card control is installed on the pre-charge control cabinet, communicates with the flow computer through a data communication line, reads the standard condition cumulative flow, working condition cumulative flow, standard condition instantaneous flow, working condition instantaneous flow, temperature, pressure and other data, and is connected to the industrial control computer through a data communication line. The industrial control computer is also connected to a programmable logic controller, a data acquisition device, and a VGA to optical fiber transmitter.

[0006] Furthermore, the prepaid charge control cabinet is also equipped with an industrial control computer, a programmable logic controller, a power switch, a power monitor, an indicator light, a VGA to optical fiber transmitter, a forced valve opening switch, and a forced valve closing switch.

[0007] Furthermore, the industrial control computer is an all-in-one industrial computer that integrates display, control and communication.

[0008] Furthermore, the industrial control computer is connected to the programmable logic controller using an RS485 communication line, sending valve opening and closing instructions to the programmable logic controller, and reading programmable logic controller and valve status data.

[0009] Furthermore, the programmable logic controller is also connected to the valve electric actuator, indicator light, and power supply monitor. The programmable logic controller controls the valve electric actuator through the DC24V signal, executes the valve opening and closing signals, and collects the status signal of the valve electric actuator, and feeds back to the industrial control computer at the same time. The indicator light is used to indicate the current valve opening and closing action, and displays the valve opening and closing status. The programmable logic controller is also connected to the forced valve opening and forced valve closing switches. When emergency gas is needed, the forced valve opening and forced valve closing switches can be used to control the programmable logic controller to output the valve opening and closing signals to the valve electric actuator. The valve electric actuator is installed on the ball valve of the gas pipeline to control the opening and closing actions of the ball valve.

[0010] Furthermore, the power monitor monitors the external input voltage of the power switch and transmits the power failure signal to the programmable logic controller. When the power failure exceeds a certain time, the programmable logic controller automatically outputs the valve closing signal to the electric actuator to prevent the valve from not closing when the power fails and the gas consumption is not metered.

[0011] Furthermore, the data collector is connected to the industrial control computer via an RS485 data communication line and is connected to the background management system wirelessly to monitor the operation of the gas prepayment system in real time.

[0012] Furthermore, the VGA to fiber optic transmitter is connected to the VGA to fiber optic receiver via optical fiber, the VGA to fiber optic receiver is connected to the user's control room display screen, and the instantaneous gas volume, accumulated gas volume, remaining amount, valve status and other information of the prepaid control system are displayed on the user's display screen.

[0013] Furthermore, it also includes backup power supplies UPS 1 and UPS 2. UPS 1 is used to supply power to the equipment in the flow computer cabinet, and UPS 2 is used to supply power to the equipment and valve electric actuator in the prepaid control cabinet.

[0014] Description of the drawings.

[0015] Figure 1 Prepaid charge control cabinet diagram

[0016] Figure 2 Flow computer cabinet diagram

[0017] Figure 3 Schematic diagram of large flow and high pressure gas pre-charge control system

[0018] Figure 4Schematic diagram of two sets of valve structures

[0019] Figure 5 Schematic diagram of three sets of valve structures DETAILED DESCRIPTION

[0020] In order to further describe the present invention, the specific implementation of the large-flow high-pressure gas pre-charging control system is further explained below in conjunction with the accompanying drawings. The following embodiments are explanations of the present invention and the present invention is not limited to the following embodiments.

[0021] The following is a detailed description of the large flow and high pressure gas pre-charge control system with two valves. Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown: it includes a flow meter base meter 1, a flow meter base meter 2, a flow computer 1 3, a flow computer 2 4, a CPU card control 1 5, a CPU card control 2 6, an industrial control computer 9, a programmable logic controller 15, a data acquisition device 10, a valve electric actuator 1 17, a valve electric actuator 2 18, a power switch 21, a UPS 1 7, a UPS 2 8, a power monitor 14, an indicator light 16, a VGA to optical fiber transmitter 11, a VGA to optical fiber receiver 12, a prepaid control cabinet 20, and a flow computer cabinet 25.

[0022] The flow meter base meter 1 is connected in series with the ball valve 24, and the flow meter base meter 2 is connected in series with the ball valve 26, and then installed on two parallel branches on the gas pipeline. The valve electric actuator 17 is installed on the ball valve 24, the valve electric actuator 28 is installed on the ball valve 26, and the flow computer 13 and the flow computer 24 are installed on the cabinet door of the flow computer cabinet 25. The flow computer 13 collects the working flow, temperature, and pressure data of the flow meter base meter 1, and the flow computer 24 collects the working flow, temperature, and pressure data of the flow meter base meter 2. The flow computer converts the flow into the standard flow after correction according to the temperature and pressure.

[0023] CPU card control 15 reads the standard condition cumulative flow, working condition cumulative flow, working condition instantaneous flow, standard condition instantaneous flow, temperature, and pressure of flow computer 13 through RS422, and uses the standard condition cumulative flow as the basis for charging. CPU card control 26 reads the standard condition cumulative flow, working condition cumulative flow, working condition instantaneous flow, standard condition instantaneous flow, temperature, and pressure of flow computer 24 through RS422, and uses the standard condition cumulative flow as the basis for charging. CPU card control 15 and CPU card control 26 have a CPU card recharge interface. After the user takes the user card to the gas charging system of the gas company to purchase gas, the user card is inserted into the recharge interface of the CPU card control, and the purchased gas volume is stored in the CPU card control. CPU card control 15 and CPU card control 26 calculate independently, and when arrears occur, they automatically output valve closing signals.

[0024] The industrial control computer 9 reads the data of the CPU card control 1 5 and the CPU card control 2 6 through RS485, monitors the valve opening and closing signals of the CPU card control 1 5 and the CPU card control 2 6, and displays them on the screen of the industrial control computer 9.

[0025] The industrial control computer 9 communicates with the programmable logic controller 15 via RS485, sends valve opening and closing instructions to the programmable logic controller 15 at regular intervals, and reads the programmable logic controller 15 and valve status data.

[0026] The programmable logic controller 15 controls the valve electric actuator 17 and the valve electric actuator 2 18 to open and close the ball valve 24 and the ball valve 26 respectively through a DC24V direct current signal. The programmable logic controller 15 also controls the indicator light 16 to indicate the current opening and closing of the valve, and to indicate the state of the valve opening and closing. The programmable logic controller 15 is connected to the forced opening and closing switches through DC24V. When emergency gas is needed, the forced opening and closing switches can be used to control the programmable logic controller to output the opening and closing valve signals to the valve electric actuator.

[0027] The power monitor 14 monitors the external input voltage of the power switch 21, and transmits the power failure signal to the programmable logic controller. When the power failure exceeds a certain time, the programmable logic controller automatically outputs the valve closing signal to the valve electric actuator 17 and the valve electric actuator 2 18 to close the ball valve 24 and the ball valve 26. This prevents the valve from not closing when the power fails and the gas consumption from not being metered.

[0028] The backup power supply UPS-7 is specially used to supply power to the equipment in the flow computer cabinet, and UPS-8 is used to supply power to the equipment and valve electric actuator in the pre-charge control cabinet.

[0029] The VGA to optical fiber transmitter 11 is connected to the industrial control computer 9 via a VGA line, and then connected to the VGA to optical fiber receiver 12 at the far end via an optical fiber. The VGA to optical fiber receiver 12 is connected to the user's central control room display screen 13 via a VGA line. The user's central control room display screen displays the data related to the two CPU card controls and the user, such as the standard condition accumulated gas consumption, instantaneous flow, remaining amount (or gas volume), temperature, pressure, valve status and other data.

[0030] As another embodiment of a large flow and high pressure gas pre-charge control system, Figure 5 As shown, three parallel branches can be controlled, and there are three sets of flow meter base meter, flow computer, CPU card control, valve electric actuator and ball valve.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A large-flow, high-pressure gas pre-charge control system. Features: It includes a flow meter base, a flow computer, a CPU card control, an industrial control computer, a programmable logic controller, a data acquisition device, a valve electric actuator, a UPS, a power monitor, an indicator light, a VGA to optical fiber transceiver, a prepaid control cabinet, and a flow computer cabinet. The flow meter base is installed on the gas pipeline and is electrically connected to the flow computer.

2. The large-flow, high-pressure gas pre-charge control system as claimed in claim 1, It is characterized in that The flow computer is installed on the flow computer cabinet and is electrically connected to the CPU card control. The CPU card control is installed on the pre-charge control cabinet and is electrically connected to the industrial control computer. The industrial control computer is also electrically connected to a programmable logic controller, a data collector, and a VGA to optical fiber transmitter.

3. According to the large flow and high pressure gas pre-charge control system of claim 1, Features: The prepaid charge control cabinet is also equipped with an industrial control computer, a programmable logic controller, a power switch, a power monitor, an indicator light, and a VGA to optical fiber transmitter.

4. According to claim 1, the large-flow high-pressure gas pre-charge control system, Features: The programmable logic controller is also electrically connected to the valve electric actuator, the indicator light and the power supply monitor.

5. According to the large flow and high pressure gas pre-charge control system of claim 1, Features: The data collector is connected to the background management system via wireless to monitor the operation of the gas prepayment system in real time.

6. According to claim 1, the large-flow high-pressure gas pre-charge control system, Features: The VGA to fiber optic transmitter is connected to the VGA to fiber optic receiver via optical fiber, and the VGA to fiber optic receiver is connected to the user's central control room display screen. The instantaneous gas volume, accumulated gas volume, remaining amount, and valve status information of the prepaid control system are displayed on the user's display screen.

7. According to claim 1, the large-flow high-pressure gas pre-charge control system, Features: It also includes UPS 1 and UPS 2. When the external power is off, UPS 1 supplies power to the equipment in the flow computer cabinet, and UPS 2 supplies power to the equipment in the prepayment control cabinet.

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