Liquefied petroleum gas tank truck unloading control device
By using solenoid valves and regulating valves during the unloading process of liquefied petroleum gas tank trucks, combined with a PLC control system and a wireless communication module, the safety and convenience of the unloading process of liquefied petroleum gas tank trucks have been achieved, and the problem of easy errors in manual valve operation has been solved.
Patent Information
- Application Number
- CN202423300713.8
- 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
During the unloading process of existing liquefied petroleum gas tank trucks, manual valve operation is prone to errors, posing safety hazards and making real-time monitoring and information recording inconvenient.
Solenoid valves and regulating valves are used to replace manual valves. Combined with a PLC control system and a wireless communication module, remote control and real-time monitoring are achieved. The valve status can be viewed and operated through an HMI human-machine interface.
It improves the safety and ease of operation of the unloading process, reduces human error, and enables real-time monitoring and convenient management of valve status.
Smart Images
Figure CN223579679U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to liquefied gas filling technical field especially relates to a liquefied petroleum gas tank truck unloading control device. BACKGROUND
[0002] Liquefied gas is transported by liquefied petroleum gas tank truck, and the liquefied petroleum gas tank truck is loaded and unloaded in the form of a whole vehicle entering the unloading area, the compressor is used to extract the gas phase of the liquid storage tank, and the liquefied petroleum gas tank vehicle is compressed into the liquefied petroleum gas tank vehicle, and the medium in the liquefied petroleum gas tank vehicle is pressed into the liquid storage tank by the pressure difference. In the prior art, a manual valve is installed on the pipeline between the liquid storage tank and the compressor, on the pipeline between the liquid storage tank and the liquefied petroleum gas tank vehicle, and on the pipeline between the liquefied petroleum gas tank vehicle and the compressor, and the operator needs to be on site to manually open the corresponding manual valve, and the conventional operation is as follows:
[0003] The liquefied petroleum gas tank vehicle is parked in the unloading position, the corresponding liquid storage tank is selected, the corresponding manual valve is manually opened, the compressor is turned on, the liquid level scale provided on the liquid storage tank is manually observed, and when the liquid level scale reaches the required position, the compressor is turned off, the corresponding manual valve is manually closed, and the unloading is completed.
[0004] During the manual opening / closing of the manual valve by the operator, sometimes, the wrong operation occurs, the manual valve that should not be opened is opened, and there is a safety hazard, the safety officer cannot query the record information of the wrong operation, and the operator is easy to evade responsibility. SUMMARY
[0005] The utility model aims at providing a liquefied petroleum gas tank truck unloading control device, and the manual valve is replaced by the electromagnetic valve and the regulating valve, the operator does not need to arrive at the scene, manually opens / closes the valve, the safety officer can check the opening / closing time of the valve at any time through the control unit, and the utility model is intuitive and convenient.
[0006] To achieve the above object, the utility model realizes the following technical scheme:
[0007] The application discloses a liquefied petroleum gas tank truck unloading control device, which comprises n liquid storage tanks, one end of each liquid storage tank is connected with a compressor through a pipeline, the other end of each liquid storage tank is connected with one end of a gas tank truck through a pipeline, the other end of the gas tank truck is connected with the compressor through a pipeline, an electromagnetic valve one is arranged on the pipeline of the compressor at the one end of each liquid storage tank, an electromagnetic valve two, an adjusting valve one and an electromagnetic valve three are sequentially arranged on the pipeline at the other end of each liquid storage tank, an electromagnetic valve four and an adjusting valve two are sequentially arranged on the pipeline of the compressor at the other end of the gas tank truck, the electromagnetic valve one and the electromagnetic valve two are connected with a liquid storage tank control unit, the adjusting valve one, the adjusting valve two, the electromagnetic valve three and the electromagnetic valve four are connected with a public auxiliary control unit, and the public auxiliary control unit and the liquid storage tank control unit are connected with a remote control center.
[0008] Each liquid storage tank control unit comprises a digital quantity output module one and a communication module four, the digital quantity output module one and the communication module four are connected through a port, the communication module four is connected with the remote control center, the digital quantity output module one is connected with a coil of a relay group one through a port, and the normally open contact of the relay group one is connected with the electromagnetic valve one and the electromagnetic valve two; the number of the electromagnetic valve one and the electromagnetic valve two is greater than or equal to 1, and the relay group one comprises a plurality of relays.
[0009] The public auxiliary control unit comprises a digital quantity output module two and a communication module five, the communication module five is connected with the remote control center, the digital quantity output module two is connected with a coil of a relay group two through a port, the normally open contact of the relay group two is connected with the electromagnetic valve three and the electromagnetic valve four, the number of the electromagnetic valve three and the electromagnetic valve four is greater than or equal to 1, and the relay group two comprises a plurality of relays.
[0010] A pressure sensor, a liquid level sensor and a temperature sensor are arranged in each liquid storage tank, each liquid storage tank control unit further comprises an analog quantity input module, the analog quantity input module is connected with an output end of an isolation transmitter group, and the input end of the isolation transmitter group is connected with the pressure sensor, the liquid level sensor and the temperature sensor.
[0011] The public auxiliary control unit further comprises an analog quantity output module, the analog quantity output module, the digital quantity output module two and the communication module five are connected through a port, and the analog quantity output module is connected with the adjusting valve one and the adjusting valve two.
[0012] The isolation transmitter group comprises an isolation transmitter group one and an isolation transmitter group two, the input end of the isolation transmitter group one is connected with the pressure sensor and the liquid level sensor, and the input end of the isolation transmitter group two is connected with the temperature sensor.
[0013] The first isolation transmitter group comprises a plurality of isolation transmitters, each outputting 0-20mA, and the second isolation transmitter group comprises a plurality of temperature isolation transmitters, and the temperature sensor adopts PT100.
[0014] The remote control center comprises a CPU module and a communication module one, the CPU module and the communication module one are connected through a port, and the communication module one is connected with the communication module four and the communication module five through a port respectively.
[0015] Each liquid storage tank control unit and the public auxiliary control unit are PLCs.
[0016] The wireless communication module is any one or combination of 5G communication module, 4G communication module, Bluetooth module, WiFi module, GSM module, CDMA module, CDMA module, WCDMA module, TD-SCDMA module, Zigbee module and LoRa module.
[0017] Compared with the prior art, the utility model has the advantages that:
[0018] 1. Each liquid storage tank is provided with a corresponding liquid storage tank control unit, the temperature sensor, pressure sensor, liquid level sensor, electromagnetic valve one and electromagnetic valve two of each liquid storage tank are connected with the liquid storage tank control unit, the adjusting valve one, adjusting valve two, electromagnetic valve three and electromagnetic valve four are connected with the public auxiliary control unit, and the maintenance personnel can check the equipment operation state at any time through the HMI man-machine interaction screen, so that the maintenance is portable, time-saving and labor-saving.
[0019] 2. The safety officer can check the operation state of the electromagnetic valve and adjusting valve at any time through the HMI man-machine interaction screen, so that the safety management is facilitated.
[0020] 3. The operation personnel can turn on / off the electromagnetic valve through the HMI man-machine interaction screen, so that the operation is simple, time-saving and labor-saving.
[0021] 4. The digital output module is connected with the corresponding electromagnetic valve through the relay group, the analog input module is connected with the pressure sensor, liquid level sensor and temperature sensor through the isolation transmitter group, and the relay group and isolation transmitter group are used for the isolation of digital and analog signals, so that the safe use of the digital output module and analog input module is ensured.
[0022] 5. The analog output module is connected with the adjusting valve through the port, and the operation personnel can operate the adjusting valve opening degree through the button set on the HMI man-machine interaction screen, so that the operation is convenient and intuitive.
[0023] 6. The CPU module is connected with the remote terminal through the wireless communication module, and the operation personnel can check the equipment operation state at any time through the mobile phone or PC, so that the safety management of the inflation station is convenient.
[0024] 7、The liquid storage tank is provided with a pressure sensor, a liquid level sensor, replaces the on-site pressure gauge of the liquid storage tank and the liquid level scale provided on the liquid storage tank, and is provided with a temperature sensor, so that the operator can check the temperature, pressure and liquid level information in the liquid storage tank at any time through the HMI man-machine interaction screen. BRIEF DESCRIPTION OF DRAWINGS
[0025] Figure 1 Figure 7 is a schematic diagram of the PLC structure of the liquefied petroleum gas tank truck unloading control device.
[0026] Figure 2 Figure 7 is a schematic diagram of the PLC structure of the liquefied petroleum gas tank truck unloading control device.
[0027] Figure 3 Figure 7 is a schematic diagram of the PLC structure of the liquefied petroleum gas tank truck unloading control device.
[0028] Figure 4 Figure 7 is a schematic diagram of the PLC structure of the liquefied petroleum gas tank truck unloading control device. DETAILED DESCRIPTION
[0029] The utility model will be described in detail below in combination with the drawings of the specification, but it should be pointed out that the implementation of the utility model is not limited to the following embodiments.
[0030] The following examples are implemented on the premise of the technical scheme of the utility model, and detailed implementation modes and specific operation processes are given, but the protection scope of the utility model is not limited to the following examples. The methods used in the following examples are all conventional methods unless otherwise specified.
[0031] Example 1
[0032] The pressure and liquid level on-site instruments of each liquid storage tank are replaced by pressure sensors and liquid level sensors, the liquid inlet valve YV401, the gas phase compressor valve YV101, the gas phase valve YV103, the compressor gas phase valve YV102 and the increased temperature sensor of each liquid storage tank, the pressure sensor, the liquid level sensor and the temperature sensor are connected with the control unit of the corresponding liquid storage tank; flow regulating valve YV006 and speed regulating valve YV003 are added before unloading liquid phase valve YV007 and unloading gas phase valve YV005 respectively, and unloading liquid phase valve YV007, unloading gas phase valve YV005, flow regulating valve YV006, speed regulating valve YV003, compressor inlet valve YV001 and compressor outlet valve YV002 are connected with the auxiliary control unit.
[0033] See Figure 3 The control unit of each liquid storage tank includes a power module, a digital input module, a digital output module, an analog input module and a communication module four, the power module, the digital input module, the digital output module, the analog input module and the communication module four are connected through ports, and the control unit of one of the liquid storage tanks is taken as an example for description, and the contents are as follows:
[0034] The input end of the power module is connected with AC 220V, the digital output module is connected with the coil of the relay group KA11~KA14 through the port, the normally open contact of the relay group KA11~KA14 is connected with the liquid inlet valve YV401, the gas phase valve YV103, the gas phase compressor valve YV101 and the compressor gas phase valve YV102 respectively; the analog input module is connected with the output end of the isolation transmitter group through the port, the isolation transmitter group includes isolation transmitter one and temperature transmitter, the input end of the isolation transmitter one is connected with the pressure sensor and the liquid level sensor respectively, the input end of the temperature isolation transmitter is connected with the corresponding temperature sensor; the input end of the digital input module is connected with the on / off limit switch of the liquid inlet valve YV401, the gas phase valve YV103, the gas phase compressor valve YV101 and the compressor gas phase valve YV102 through the port; the communication module four is connected with the remote control center.
[0035] See Figure 2 The public auxiliary control unit includes a power module, a digital input module, a digital output module, an analog output module, a communication module five, a communication module six, the power module, the digital input module, the digital output module, the analog output module, the communication module five and the communication module six are connected through the port, the communication module six is connected with the compressor through the port, the communication module six is used for transmitting the start / stop signal of the compressor to the remote control center, and the compressor is started / stopped through the HMI human-computer interaction screen; the analog output module is connected with the flow regulating valve YV006 and the speed regulating valve YV003 through the port; the digital output module is connected with the coil of the relay group KA21~KA25 through the port, the normally open contact of the relay group KA21~KA25 is connected with the compressor inlet valve YV001, the unloading liquid phase valve YV007, the unloading gas phase valve YV005, the compressor outlet valve YV002 and the compressor unloading gas phase valve YV004 respectively; the digital input module is connected with the on / off limit switch of the compressor inlet valve YV001, the unloading liquid phase valve YV007, the unloading gas phase valve YV005, the compressor outlet valve YV002 and the compressor unloading gas phase valve YV004 through the port; the communication module five is connected with the remote control center.
[0036] The liquid storage tank control unit and the public auxiliary control unit are installed in the corresponding control box, the control box is an explosion-proof control box, the explosion-proof control box includes a 1# liquid storage tank substation explosion-proof control box, a 2# liquid storage tank substation explosion-proof control box, a 3# liquid storage tank substation explosion-proof control box and a public auxiliary substation explosion-proof control box, each explosion-proof operation box is connected with the corresponding external equipment (see Figure 2 , Figure 3The corresponding external devices include electromagnetic valves, regulating valves and sensors, and are connected through cables, so that each explosion-proof control box is installed nearby to save cable length, and if a problem occurs in a module in the corresponding explosion-proof control box or the corresponding external device, the power module of the corresponding explosion-proof control box can be stopped, without affecting the operation of other explosion-proof control boxes, thereby facilitating maintenance.
[0037] See Figure 1 The remote control center comprises a power module, a CPU module, a communication module one, a communication module two and a communication module three, the power module, the CPU module, the communication module one, the communication module two and the communication module three are connected through ports, the communication module one is connected with a communication module four of a control unit of each liquid storage tank and a communication module five of a public auxiliary control unit through a communication cable, the communication module two is connected with an HMI human-computer interaction screen, the HMI human-computer interaction screen is arranged in an operation room, the CPU module is connected with a remote terminal through a wireless communication module, the remote terminal is used for acquiring data information of the wireless communication module, the data information comprises start-stop and running time information of electromagnetic valves and opening degree information of regulating valves; the wireless communication module is any one or any combination of a 5G communication module, a 4G communication module, a Bluetooth module, a WiFi module, a GSM module, a CDMA module, a WCDMA module, a TD-SCDMA module, a Zigbee module and a LoRa module; the control unit of each liquid storage tank and the public auxiliary control unit are PLCs.
[0038] See Figure 4The application discloses a liquefied petroleum gas tank truck unloading control device, which comprises a compressor, liquid storage tanks and a control unit, wherein the liquid storage tanks are three in number, each of the liquid storage tanks is provided with a temperature sensor, a pressure sensor and a liquid level sensor for detecting the temperature, pressure and liquid level of the liquid storage tank respectively, the liquid inlet of each of the liquid storage tanks is connected with a liquid inlet valve YV401, the gas phase port of each of the liquid storage tanks is connected with a gas phase valve YV103, the inlet of the compressor is provided with a compressor inlet valve YV001, the outlet of the compressor is provided with a compressor outlet valve YV002, the output end of the liquid inlet valve YV401 is connected with the liquid phase port of the liquefied petroleum gas tank truck through an unloading discharge pipe, the output end of the gas phase valve YV103 is connected with the input end of an unloading gas phase valve YV005 through an unloading booster pipe one, the output end of the gas phase valve YV103 is also connected with the input end of the compressor inlet valve YV001, the unloading discharge pipe is sequentially provided with a flow regulating valve YV006 and an unloading liquid phase valve YV007, the unloading booster pipe one is sequentially provided with a speed regulating valve YV003 and the unloading gas phase valve YV005, the outlet of the compressor is connected with the input end of the unloading gas phase valve YV005 through an unloading booster pipe two, the unloading booster pipe two is sequentially provided with the compressor outlet valve YV002 and a compressor unloading gas phase valve YV004, the gas phase valve YV103 and the unloading booster pipe one are provided with a gas phase compressor valve YV101, and the gas phase valve YV103 and the unloading booster pipe two are provided with a compressor gas phase valve YV102; the liquid inlet valve YV401, the gas phase valve YV103, the unloading liquid phase valve YV007, the unloading gas phase valve YV005, the compressor outlet valve YV002, the compressor unloading gas phase valve YV004, the compressor inlet valve YV001, the gas phase compressor valve YV101, the compressor gas phase valve YV102 are solenoid valves, and the flow regulating valve YV006 and the speed regulating valve YV003 are regulating valves.
[0039] Working process: the liquefied petroleum gas tank truck is parked on the unloading position, and the unloading discharge pipe, the unloading booster pipe one and the unloading booster pipe two are connected with the liquefied petroleum gas tank truck. The unloading is operated on the HMI man-machine interaction screen, and the specific steps include the following steps.
[0040] S1, selecting the medium (liquefied petroleum gas tank truck) to be unloaded;
[0041] S2, selecting the target liquid storage tank (for example, the 1# liquid storage tank) to be unloaded;
[0042] S3, selecting the required unloading liquid level (namely, the unloading amount);
[0043] S4, selecting the valve opening option (the unloading station valve is opened), and opening the tank truck valve under the monitoring condition;
[0044] S5, opening the compressor, and after reaching the required liquid level, the compressor is automatically closed, and the liquefied petroleum gas pressure pipeline unloading station electric control valve is automatically closed.
[0045] S6, manually close the tank truck valve, and unloading is finished.
[0046] The utility model discloses each liquid storage tank is equipped with corresponding liquid storage tank control unit, and the temperature sensor, pressure sensor, liquid level sensor, solenoid valve no.
Claims
1. A control device for unloading a liquefied petroleum gas tank truck, comprising n number of liquid storage tanks, one end of each of the liquid storage tanks being connected to a compressor via a pipe, the other end of each of the liquid storage tanks being connected to one end of a tank truck via a pipe, the other end of the tank truck being connected to the compressor via a pipe, characterized in that, One end of each liquid storage tank is provided with an electromagnetic valve one on the pipeline of the compressor, and the other end of each liquid storage tank is sequentially provided with an electromagnetic valve two, an adjusting valve one, and an electromagnetic valve three on the pipeline of one end of the gas tank truck, and the other end of the gas tank truck is sequentially provided with an electromagnetic valve four and an adjusting valve two on the pipeline of the compressor, the electromagnetic valve one and the electromagnetic valve two are connected with the control unit of each liquid storage tank, the adjusting valve one, the adjusting valve two, the electromagnetic valve three, and the electromagnetic valve four are connected with the auxiliary control unit, and the auxiliary control unit and the control unit of each liquid storage tank are connected with the remote control center; the remote control center comprises a wireless communication module, and the wireless communication module is connected with the remote terminal through a port.
2. The LPG tank truck unloading control device according to claim 1, characterized by Each control unit of the liquid storage tank comprises a digital output module one and a communication module four, the digital output module one and the communication module four are connected through a port, the communication module four is connected with the remote control center, the digital output module one is connected with the coil of a relay group one through a port, and the normally open contact of the relay group one is connected with the electromagnetic valve one and the electromagnetic valve two; the number of the electromagnetic valve one and the electromagnetic valve two is greater than or equal to one, and the relay group one comprises a plurality of relays.
3. The LPG tank truck unloading control device according to claim 1, characterized by The auxiliary control unit comprises a digital output module two and a communication module five, the communication module five is connected with the remote control center, the digital output module two is connected with the coil of a relay group two through a port, the normally open contact of the relay group two is connected with the electromagnetic valve three and the electromagnetic valve four, the number of the electromagnetic valve three and the electromagnetic valve four is greater than or equal to one, and the relay group two comprises a plurality of relays.
4. The LPG tank truck unloading control device according to claim 1, characterized by Each liquid storage tank is provided with a pressure sensor, a liquid level sensor, and a temperature sensor, and each control unit of the liquid storage tank further comprises an analog input module, the analog input module is connected with the output end of an isolation transmitter group, and the input end of the isolation transmitter group is connected with the pressure sensor, the liquid level sensor, and the temperature sensor.
5. The LPG tank truck unloading control device according to claim 3, wherein The auxiliary control unit further comprises an analog output module, the analog output module, the digital output module two, and the communication module five are connected through a port, and the analog output module is connected with the adjusting valve one and the adjusting valve two.
6. The LPG tank truck unloading control device according to claim 4, wherein The isolation transmitter group comprises an isolation transmitter group one and an isolation transmitter group two, the input end of the isolation transmitter group one is connected with the pressure sensor and the liquid level sensor, and the input end of the isolation transmitter group two is connected with the temperature sensor.
7. The LPG tank truck unloading control device according to claim 6, wherein The isolation transmitter group one comprises a plurality of isolation transmitters, each isolation transmitter outputs 0-20mA, the isolation transmitter group two comprises a plurality of temperature isolation transmitters, and the temperature sensor adopts PT100.
8. The LPG tank truck unloading control device according to claim 1, characterized by The remote control center comprises a CPU module and a communication module one, the CPU module and the communication module one are connected through a port, and the communication module one is connected with the communication module four and the communication module five through a port.
9. The LPG tank truck unloading control device according to claim 1, wherein Each control unit of the liquid storage tank and the auxiliary control unit are PLC.
10. The LPG tank truck unloading control device according to claim 1, characterized by The wireless communication module is any one or any combination of 5G communication module, 4G communication module, Bluetooth module, WiFi module, GSM module, CDMA module, WCDMA module, TD-SCDMA module, Zigbee module, and LoRa module.