Liquefied gas steel cylinder residue extraction control device
By replacing manual valves with solenoid valves and regulating valves at liquefied gas filling stations, and combining them with control units and wireless communication modules, remote control and real-time monitoring of the residual gas cylinder pumping process have been achieved. This solves the safety hazards and recording difficulties caused by manual valve operation, and improves safety management and ease of operation.
Patent Information
- Application Number
- CN202423300674.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-31
AI Technical Summary
In existing LPG filling stations, manual valve operation poses safety hazards, and the operation records of operators cannot be monitored in real time, leading to issues of shirking responsibility.
By replacing manual valves with solenoid valves and regulating valves, and combining them with control units, sensors and wireless communication modules, remote control and real-time monitoring can be achieved. The opening and closing time and status of the valves can be viewed through the HMI human-machine interface screen.
It enables real-time monitoring by safety officers and convenient operation by workers, reducing safety hazards and improving operational safety and management efficiency.
Smart Images
Figure CN223579678U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of operation and transportation technology, and in particular to a residual gas cylinder extraction control device. Background Technology
[0002] Liquefied petroleum gas (LPG), a byproduct of the oil refining industry, has become a widely used civilian fuel with economic development. It not only solves the problem of disposing of byproducts from the oil refining industry but also benefits environmental protection and is convenient for residents, making it an ideal substitute for traditional fuels. However, many LPG filling stations have manual valves installed on the pipelines between the residual liquid tank and the LPG cylinder, and between the LPG cylinder and the compressor. This requires on-site personnel to manually open the corresponding valves. The standard operation is as follows:
[0003] The operator starts the compressor and, by observing the local pressure gauges and level scales on the residual liquid tank and storage tank, manually opens or closes the corresponding manual valves in sequence to pressurize the liquefied petroleum gas cylinder. Under pressure, the residual liquid enters the residual liquid tank until the residual liquid recovery is complete.
[0004] Sometimes, during the manual opening / closing of manual valves, operators may make mistakes and open valves that should not be opened, posing safety hazards. Safety officers cannot check the records of these erroneous operations, making it easy for operators to shirk responsibility. Summary of the Invention
[0005] The purpose of this invention is to provide a residual gas cylinder extraction control device that uses solenoid valves and regulating valves to replace manual valves. This eliminates the need for operators to be on-site to manually open / close the valves. Safety officers can monitor the valve opening and closing times at any time through the control unit, making it intuitive and convenient.
[0006] To achieve the above objectives, this utility model employs the following technical solution:
[0007] A residual gas cylinder extraction control device includes a residual liquid tank, a storage tank, and a gas cylinder. The residual liquid tank is connected to a compressor via a pipeline, the storage tank is connected to the compressor via a pipeline, and the gas cylinder is connected to the compressor via a pipeline. The storage tank, residual liquid tank, and gas cylinder are connected via pipelines. A solenoid valve is installed on the pipeline between the residual liquid tank and the compressor. A solenoid valve is installed on the pipeline between the storage tank and the compressor. A solenoid valve is installed on the pipeline between the gas cylinder and the compressor. A regulating valve is installed on the pipeline between the storage tank and the residual liquid tank. A solenoid valve is installed on the pipeline between the residual liquid tank and the gas cylinder. Solenoid valves 1, 2, 3, 4, 5, 1, and 2 are connected to a control unit. The control unit is connected to a remote control center. The remote control center includes a wireless communication module, which is connected to a remote terminal via a port.
[0008] The control unit includes a digital output module and a communication module 1. The digital output module and the communication module 1 are connected through a port. The communication module 1 is connected to a remote control center. The digital output module is connected to the coil of the relay group through a port. The normally open contacts of the relay group are connected to solenoid valve 1, solenoid valve 2, solenoid valve 3, solenoid valve 4, and solenoid valve 5 respectively. The number of each of the following solenoid valves is ≥1: 1.
[0009] Each storage tank and each residual liquid tank is equipped with a pressure sensor, a liquid level sensor, and a temperature sensor. The control unit also includes an analog input module, which is connected to the output of the isolation transmitter group. The input of the isolation transmitter group is connected to the pressure sensor, the liquid level sensor, and the temperature sensor, respectively.
[0010] The control unit also includes an analog output module, which is connected to regulating valve one and regulating valve two.
[0011] A relay group consists of several relays.
[0012] The isolation transmitter group includes an isolation transmitter group 1 and an isolation transmitter group 2. The input terminals of the isolation transmitter group 1 are connected to a pressure sensor and a level sensor, respectively, and the input terminal of the isolation transmitter group 2 is connected to a temperature sensor.
[0013] Isolation transmitter group one includes several isolation transmitters, each with an output of 0-20mA. Isolation transmitter group two includes several temperature isolation transmitters, with PT100 temperature sensors.
[0014] The remote control center includes a CPU module and a second communication module. The CPU module and the second communication module are connected via a port, and the second communication module is connected to the second communication module via a port.
[0015] The wireless communication module is any one or any combination of several of the following: 5G communication module, 4G communication module, Bluetooth module, WiFi module, GSM module, CDMA module, WCDMA module, TD-SCDMA module, Zigbee module, and LoRa module.
[0016] The control unit is a PLC.
[0017] Compared with the prior art, the beneficial effects of this utility model are:
[0018] 1. Safety officers can view the start and stop times of solenoid valves at any time through the HMI human-machine interface screen, which facilitates safety management;
[0019] 2. Operators can start and stop the solenoid valves through the HMI human-machine interface, which is simple to operate and saves time and effort;
[0020] 3. The digital output module is connected to the corresponding solenoid valve through the relay group, and the analog input module is connected to the pressure sensor, liquid level sensor and temperature sensor through the isolation transmitter group. The relay group and the isolation transmitter group are used to isolate the digital signal and the analog signal respectively to ensure the safe use of the digital output module and the analog input module.
[0021] 4. The analog output module is connected to the residual liquid return tank regulating valve and the residual liquid pressurization regulating valve through the port. The operator can operate the opening of the regulating valve through the buttons set on the HMI human-machine interface screen, which is convenient and intuitive.
[0022] 5. The CPU module connects to a remote terminal via a wireless communication module, allowing operators to check the equipment's operating status anytime via mobile phone or PC, making the gas filling station's safety management convenient.
[0023] 6. Both the residual liquid tank and the storage tank are equipped with pressure sensors and level sensors, replacing the local pressure gauges and level scales on the residual liquid tank and the storage tank. Temperature sensors are also installed in the residual liquid tank and the storage tank, allowing operators to view the temperature, pressure, and level information of the storage tank at any time through the HMI human-machine interface. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the residual removal control device for liquefied petroleum gas cylinders.
[0025] Figure 2 This is a schematic diagram of the PLC principle of the residual removal control device for liquefied petroleum gas cylinders.
[0026] Figure 3 This is a schematic diagram of the relay group.
[0027] Figure 4 This is a schematic diagram illustrating the residual gas extraction control principle of liquefied petroleum gas cylinders. Detailed Implementation
[0028] The present invention will now be described in detail with reference to the accompanying drawings. However, it should be noted that the implementation of the present invention is not limited to the following embodiments.
[0029] The following embodiments are implemented based on the technical solution of this utility model, providing detailed implementation methods and specific operation processes. However, the protection scope of this utility model is not limited to the following embodiments. Unless otherwise specified, the methods used in the following embodiments are conventional methods.
[0030] Example 1
[0031] After the modification, the manual valve was replaced with a solenoid valve and a regulating valve, see [link / details]. Figure 4A residual liquid control device for liquefied petroleum gas (LPG) cylinders includes an LPG cylinder, a compressor, a No. 1 storage tank, a No. 2 storage tank, and a residual liquid tank. Temperature sensors, pressure sensors, and liquid level sensors are installed in each of the No. 1, No. 2, and residual liquid tanks to detect the temperature, pressure, and liquid level in the respective tanks. The outlet of the No. 1 storage tank is connected to one end of the No. 1 storage tank outlet valve YV12, and the outlet of the No. 2 storage tank is connected to one end of the No. 2 storage tank outlet valve YV13. The vapor phase port of the No. 1 storage tank is connected to one end of the No. 1 storage tank vapor phase valve YV213, and the vapor phase port of the No. 2 storage tank is connected to one end of the No. 2 storage tank vapor phase valve YV313. The outlet of the residual liquid tank is connected to the residual liquid tank outlet valve YV12. One end of valve 11 is connected to the gas phase port of the residual liquid tank, which is connected to one end of the residual liquid tank gas phase valve YV113. The other ends of the outlet valves YV12 and YV13 of tank #1, and YV11 of the residual liquid tank are all connected to one end of the residual liquid return regulating valve YV21 via pipelines. The compressor inlet is connected to one end of the residual liquid booster regulating valve YV22, the other end of the gas phase valve YV213 of tank #1, the other end of the gas phase valve YV313 of tank #2, and the other end of the gas phase valve YV113 of the residual liquid tank. The compressor outlet is connected to one end of the residual liquid booster regulating valve YV22, the other end of the gas phase valve YV213 of tank #1, and the other end of the gas phase valve YV113 of tank #2. The other end of V313 is connected to the other end of the residual liquid tank vapor phase valve YV113. The other ends of the residual liquid return regulating valve YV21 and the residual liquid boosting regulating valve YV22 are both connected to the liquefied petroleum gas cylinder. The compressor inlet and the residual liquid boosting regulating valve YV22 are connected in sequence via pipelines to the compressor inlet valve YV01 and the residual liquid compression valve YV23. The compressor outlet and the residual liquid boosting regulating valve YV22 are connected in sequence via pipelines to the compressor outlet valve YV02 and the residual liquid compression valve YV24. The compressor inlet valve YV01 and the No. 1 storage tank vapor phase valve YV213 are connected via pipelines to the No. 1 storage tank vapor phase compression valve YV211. A gas phase compression valve YV311 for tank #2 is connected to YV01 and YV313 for tank #2 via a pipeline. A gas phase compression valve YV111 for tank #2 is connected to YV01 for compressor inlet valve and YV113 for residual liquid tank via a pipeline. A gas phase compression valve YV212 for tank #1 is connected to YV02 for compressor outlet valve and YV213 for tank #1 via a pipeline. A gas phase compression valve YV312 for tank #2 is connected to YV02 for compressor outlet valve and YV313 for tank #2 via a pipeline. A gas phase compression valve YV112 for tank #2 is connected to YV02 for compressor outlet valve and YV113 for residual liquid tank via a pipeline.
[0032] See Figures 1-3A device for extracting residual liquid from liquefied petroleum gas cylinders includes a control unit. The control unit comprises a power module, a digital output module, an analog output module, an analog input module 1, an analog input module 2, a communication module 1, a communication module 3, a wireless communication module, an HMI (Human-Machine Interface) screen, and a communication module 4. The HMI screen is connected to communication module 3 and is located in an operator's room for easy operation. The digital output module, analog input module 1, analog input module 2, analog output module, communication module 1, communication module 3, and communication module 4 are connected via a rack. Communication module 4 is connected to a compressor via a port and is used to transmit compressor start / stop signals to a remote control center. The HMI (Human-Machine Interface) screen starts and stops the compressor; the power module provides DC24V operating power, and its input is connected to AC220V. The digital output module is connected to the coils of relay group K1-K16 via a port. The normally open contacts of relay group K1-K16 are connected to solenoid valves, namely: 1# tank outlet valve YV12, 2# tank outlet valve YV13, residual liquid tank outlet valve YV11, 1# tank vapor phase valve YV213, 2# tank vapor phase valve YV313, residual liquid tank vapor phase valve YV113, compressor inlet valve YV01, residual liquid compression valve YV23, compressor outlet valve YV02, compressed residual liquid valve YV24, 1# tank vapor phase compression valve YV211, 2#... The gas phase compression valves YV311 (storage tank), YV111 (residual liquid tank), YV212 (1# storage tank), YV312 (2# storage tank), and YV112 (residual liquid tank) are connected. The analog output module is connected to the regulating valves via ports. The regulating valves are the residual liquid return regulating valve YV21 and the residual liquid pressurization regulating valve YV22. Analog input module one is connected to the output of isolation transmitter group one via ports. The input of each isolation transmitter in isolation transmitter group one is connected to the corresponding pressure sensor and level sensor. Analog input module two is connected to the output of the temperature isolation transmitter via ports. The input of the temperature isolation transmitter is connected to the corresponding temperature sensor. Remote control... The control center includes a CPU module and a communication module 1, which are connected via a rack. Communication module 1 is connected to a switch via a network cable, and communication module 2 is connected to the switch via a network cable. The CPU module is connected to a remote terminal via a port through a wireless communication module. The remote terminal is used to obtain data information from the wireless communication module, including the start / stop and running time information of the solenoid valve and the opening information of the regulating valve. The wireless communication module can be any one or a combination of several of the following: 5G communication module, 4G communication module, Bluetooth module, WiFi module, GSM module, CDMA module, WCDMA module, TD-SCDMA module, Zigbee module, and LoRa module. The control unit is a PLC.
[0033] Work process:
[0034] When the pressure difference between the residual liquid tank and the storage tank exceeds the set value, the residual liquid return regulating valve YV21 is opened. Under pressure, the residual liquid enters the residual liquid tank until recovery is complete. If the pressure between the residual liquid tank and the cylinder is less than the set value, pressurization is required. The residual liquid return regulating valve YV21 is opened to 0%. The No. 1 storage tank vapor phase valve YV213, the No. 1 storage tank vapor phase compression valve YV211, and the compressor inlet valve YV01 are opened, starting the compressor. The compressor outlet valve YV02 is then opened, compressing the residual liquid... When liquid valve YV24 and residual liquid pressurization regulating valve YV22 are opened, the liquefied petroleum gas cylinder is pressurized. When the pressure inside the liquefied petroleum gas cylinder is higher than the pressure set value of the residual liquid tank, YV213, YV211, YV01, YV02, YV24 and YV22 are all closed, and the residual liquid return regulating valve YV21 is opened. Under the action of pressure, the residual liquid enters the residual liquid tank until the residual liquid is recovered. When the pressure difference is lower than the minimum set value, the pressurization process is repeated until the residual liquid is recovered.
[0035] This utility model adopts an HMI (Human-Machine Interface) screen, allowing safety officers to view the start and stop times of solenoid valves at any time for convenient safety management. Operators can start and stop the solenoid valves directly through the HMI screen, simplifying operation and eliminating the need for manual on-site operation, saving time and effort. The digital output module is connected to the corresponding solenoid valve via relay groups, while the analog input module is connected to the pressure sensor, level sensor, and temperature sensor via isolation transmitter groups. The relay groups and isolation transmitter groups are used for isolation of digital and analog signals, ensuring the safe use of both the digital output and analog input modules. The analog output module connects to the residual current device via a port. The liquid return tank regulating valve and residual liquid pressurization regulating valve are connected, and operators can operate the regulating valve opening through buttons on the HMI human-machine interface screen, which is convenient and intuitive. The CPU module is connected to a remote terminal via a wireless communication module, allowing operators to check the equipment operating status at any time via mobile phone or PC, making the safety management of the gas filling station convenient. Both the residual liquid tank and the storage tank are equipped with pressure sensors and liquid level sensors, replacing the local pressure gauges and liquid level scales on the residual liquid tank and the storage tank. Temperature sensors are also installed in the residual liquid tank and the storage tank, allowing operators to check the temperature, pressure, and liquid level information of the storage tank at any time through the HMI human-machine interface screen.
Claims
1. A residual liquid control device for liquefied petroleum gas (LPG) cylinders, comprising a residual liquid tank, a storage tank, and a gas cylinder, wherein the residual liquid tank is connected to a compressor via a pipeline, the storage tank is connected to the compressor via a pipeline, the gas cylinder is connected to the compressor via a pipeline, and the storage tank, residual liquid tank, and gas cylinder are connected via pipelines, characterized in that, Solenoid valve one is installed on the pipeline between the residual liquid tank and the compressor; solenoid valve two is installed on the pipeline between the storage tank and the compressor; solenoid valve three and regulating valve two are installed sequentially on the pipeline between the gas cylinder and the compressor; solenoid valve four is installed on the pipeline between the storage tank and the residual liquid tank; and solenoid valve five and regulating valve one are installed sequentially on the pipeline between the residual liquid tank and the gas cylinder. Solenoid valves one, two, three, four, five, regulating valve one, and regulating valve two are connected to the control unit, which is connected to the remote control center. The remote control center includes a wireless communication module, which is connected to the remote terminal via a port.
2. The liquefied petroleum gas cylinder residual extraction control device according to claim 1, characterized in that, The control unit includes a digital output module and a communication module 1. The digital output module and the communication module 1 are connected through a port. The communication module 1 is connected to a remote control center. The digital output module is connected to the coil of a relay group through a port. The normally open contacts of the relay group are connected to solenoid valve 1, solenoid valve 2, solenoid valve 3, solenoid valve 4, and solenoid valve 5, respectively. The number of each of the following solenoid valves is ≥1:
1.
3. The residual gas cylinder extraction control device according to claim 1, characterized in that, Each storage tank and each residual liquid tank is equipped with a pressure sensor, a liquid level sensor, and a temperature sensor. The control unit also includes an analog input module, which is connected to the output of the isolation transmitter group. The input of the isolation transmitter group is connected to the pressure sensor, the liquid level sensor, and the temperature sensor, respectively.
4. The liquefied petroleum gas cylinder residual extraction control device according to claim 1, characterized in that, The control unit also includes an analog output module, which is connected to regulating valve one and regulating valve two.
5. The liquefied petroleum gas cylinder residual extraction control device according to claim 2, characterized in that, The relay group includes several relays.
6. The residual gas cylinder extraction control device according to claim 3, characterized in that, The isolation transmitter group includes an isolation transmitter group 1 and an isolation transmitter group 2. The input terminals of the isolation transmitter group 1 are connected to a pressure sensor and a level sensor, respectively, and the input terminal of the isolation transmitter group 2 is connected to a temperature sensor.
7. The residual gas cylinder extraction control device according to claim 6, characterized in that, The first isolation transmitter group includes several isolation transmitters, each of which outputs 0-20mA. The second isolation transmitter group includes several temperature isolation transmitters, with PT100 temperature sensors.
8. The residual gas cylinder extraction control device according to claim 2, characterized in that, The remote control center includes a CPU module and a second communication module. The CPU module and the second communication module are connected via a port, and the second communication module is connected to the second communication module via a port.
9. The residual gas cylinder extraction control device according to claim 1, characterized in that, The wireless communication module is any one or a combination of any of the following: 5G communication module, 4G communication module, Bluetooth module, WiFi module, GSM module, CDMA module, WCDMA module, TD-SCDMA module, Zigbee module, and LoRa module.
10. The residual gas cylinder extraction control device according to claim 1, characterized in that, The control unit is a PLC.