LPG filling machine gun control module

Abstract

The utility model belongs to the technical field of electronic circuits, and particularly relates to a gun control module of an LPG (liquefied petroleum gas) filling machine, which is characterized in that a single chip microcomputer is respectively connected with a panel communication unit, an RS-485 communication unit, a keyboard interface unit, a digital isolation unit, a storage unit and a power supply unit; the digital isolation unit is connected with the LoRa wireless communication unit; the power supply unit is composed of a power supply I and a power supply II, the power supply I is an alternating current-direct current power supply with input of AC220V and output of + 5V, and the power supply II is an isolated power supply with input of + 5V and output of + 5V; the panel communication unit comprises a shift register and an eight-line total path transceiver. The utility model has the advantages that the problems of violation operation and potential safety accidents caused by the fact that operators in an LPG filling station perform filling operation on liquefied petroleum gas steel cylinders which do not conform to industrial regulations are solved, and the LPG filling machine conforms to the filling compliance management specifications, so that the gas cylinders which do not conform to the requirements cannot be filled.

Description

Technical Field

[0001] The utility model belongs to the technical field of electronic circuits, and in particular relates to a gun control module for an LPG filling machine. Background Art

[0002] An LPG filling station is a specialized facility for filling gas vehicle cylinders with liquefied petroleum gas (LPG). A complete LPG filling station should include the following components: a tank area (tanks, residual liquid tanks, access ladders, protective walls, etc.), a compressor room (compressors and associated motors), a steam tank loading and unloading platform (where raw materials are loaded and unloaded), a transformer room (electrical transformers and distribution equipment), a filling island (gas dispensers, etc.), a lightning tower, fire protection facilities, and office and living quarters.

[0003] LPG (liquefied petroleum gas) is a mixture of propane and butane, often with small amounts of propylene and butene. Ethyl mercaptan, a strong odorant, is added to LPG to make leaks easier to detect. LPG is produced during crude oil refining or as a volatilized gas from oil or natural gas extraction processes. Liquefied petroleum gas (LPG) is often mistaken for propane. LPG is actually a mixture of oil and natural gas under moderate pressure that exists as a liquid at room temperature. In the United States and Canada, this mixture is generally considered to be primarily propane, while in many European countries, the propane content of LPG is only 50% or less.

[0004] The Chinese invention patent application number 202010181972.0 discloses a non-sensing monitoring LPG cylinder filling system, including a filling machine, a non-sensing radio frequency reader and an electronic tag set on the bottom of the LPG cylinder; the bottom of the LPG cylinder is placed on the non-sensing radio frequency reader; the non-sensing radio frequency reader is connected to the filling machine; the filling machine includes a box; a filling pipeline set in the box; an electronic control system set in the box; the filling pipeline includes a filling pipeline and a return air pipeline; the filling pipeline includes The liquid inlet, filter, flow meter, temperature transmitter, first solenoid valve, pressure transmitter, and filling nozzle are included; the return air line includes a one-way valve and a second solenoid valve; the flow meter, temperature transmitter, first solenoid valve, pressure transmitter, and second solenoid valve are all electrically connected to the electronic control system; the non-contact radio frequency reader obtains the information recorded in the electronic tag and sends it to the electronic control system, which verifies it. If it passes the verification, it controls the above-mentioned solenoid valve to inflate the cylinder and collects information such as pressure and temperature in the filling line. This solution requires the modification of the liquefied petroleum gas pipeline and the configuration of a dedicated filling gun and dedicated angle valve. This increases the potential leakage points of liquefied petroleum gas, affecting the environmental safety of the operation site. There is a problem that LPG filling station operators may fill liquefied petroleum gas cylinders that do not meet industry regulations, resulting in illegal operations and potential safety accidents. Utility Model Content

[0005] The purpose of the utility model is to provide an LPG filling machine gun control module, which overcomes the shortcomings of the existing technology. The module only needs to be installed in the filling machine control box to prevent illegal filling. There is no need to install any devices on the liquefied petroleum gas pipeline, no need to install a special filling gun, and no need to use a special angle valve. It is beneficial to reduce possible leakage points of liquefied petroleum gas and solve the problem that LPG filling station operators perform filling operations into liquefied petroleum gas cylinders that do not comply with industry regulations, thereby causing illegal operations and potential safety accidents.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] The gun control module of the LPG filling machine includes a single-chip microcomputer, a LoRa wireless communication unit, a panel communication unit, an RS-485 communication unit, a keyboard interface unit, a digital isolation unit, a storage unit and a power supply unit. The single-chip microcomputer is respectively connected to the panel communication unit, the RS-485 communication unit, the keyboard interface unit, the digital isolation unit, the storage unit and the power supply unit; the digital isolation unit is connected to the LoRa wireless communication unit; the power supply unit is composed of a power supply 1 and a power supply 2. The power supply 1 is an AC-to-DC power supply with an input of AC220V and an output of +5V, and the power supply 2 is an isolated power supply with an input of +5V and an output of +5V. The panel communication unit includes a shift register and an eight-line main transceiver.

[0008] The model of the single chip microcomputer is STC8A8K64-45I-LQFP64.

[0009] The main chip of the LoRa wireless communication unit is ATK-MWCC68S; the main chip of the RS-485 communication unit is ADM2483.

[0010] The main chip of the shift register is 74HC164, and the main chip of the eight-line bus transceiver is AIP74HC245TA.TR.

[0011] The main chip of the keyboard interface unit is CD4066BM / TR.

[0012] The main chip of the digital isolation unit is π162E30; the main chip of the storage unit is 24C02 / TR.

[0013] The main chip of power supply 1 in the power supply unit is LM7805S2 / TR, and the main chip of power supply 2 is B0505S-1WR3.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1) This solution solves the problem of LPG filling station operators filling liquefied petroleum gas cylinders that do not comply with industry regulations, thereby violating regulations and creating potential safety hazards. It complies with the LPG filling machine filling compliance management regulations and prevents the filling of non-compliant gas cylinders.

[0016] 2) The module of the utility model only needs to be installed in the control box of the filling machine to prevent illegal filling. There is no need to install any devices on the liquefied petroleum gas pipeline, no need to install a special filling gun, and no need to use a special angle valve. It is beneficial to reduce possible leakage points of liquefied petroleum gas and ensure environmental safety at the operation site. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic block diagram of the structure of an embodiment of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the single chip microcomputer in the embodiment of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the LoRa wireless communication unit in an embodiment of the present utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the RS-485 communication unit in an embodiment of the present utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the digital isolation unit in the embodiment of the present utility model;

[0022] Figure 6 This is a schematic diagram of the storage unit structure in an embodiment of the present utility model;

[0023] Figure 7 This is a schematic structural diagram of a power supply unit in an embodiment of the present utility model;

[0024] Figure 8 It is a structural diagram of the power supply unit 2 in the embodiment of the present utility model. DETAILED DESCRIPTION

[0025] The technical solutions of the present invention will be described clearly and completely below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the specific embodiments required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the specific embodiments described below are some implementation methods of the utility model. For ordinary technicians in this field, other specific embodiments can be obtained based on these specific embodiments without paying creative work.

[0027] The components of the embodiments of the present invention generally described and shown in the specific embodiments herein can be arranged and designed in countless different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the specific embodiments is not intended to limit the scope of the claimed invention, but rather represents only selected embodiments of the present invention.

[0028] See Figure 1-8 , is a schematic structural diagram of an embodiment of the gun control module of an LPG filling machine of the present invention, which includes a single-chip microcomputer, a LoRa wireless communication unit, a panel communication unit, an RS-485 communication unit, a keyboard interface unit, a digital isolation unit, a storage unit, and a power supply unit. The single-chip microcomputer is respectively connected to the panel communication unit, RS-485 communication unit, keyboard interface unit, digital isolation unit, storage unit, and power supply unit; the digital isolation unit is connected to the LoRa wireless communication unit; the power supply unit consists of power supply 1 and power supply 2. Power supply 1 is an AC-to-DC power supply with an input of AC220V and an output of +5V, and power supply 2 is an isolated power supply with an input of +5V and an output of +5V. The panel communication unit includes a shift register and an eight-line bus transceiver.

[0029] In this embodiment, the microcontroller U7 is STC8A8K64-45I-LQFP64, and its functions are: 1) controlling the activation of designated keyboard keys; 2) collecting keyboard key values; and 3) transmitting filling data. The main chip U1 of the LoRa wireless communication unit is ATK-MWCC68S, which wirelessly communicates with the wireless gateway located in the LPG filling machine's control room. The main chip of the RS-485 communication unit U21 is ADM2483, which receives filling data from the LPG filling machine and transmits it to the wireless gateway via the LoRa wireless communication unit. The main chips U17-U18 of the shift registers are 74HC164, which collect key values ​​and transmit the data to the microcontroller. The main chip U20 of the eight-line bus transceiver is AIP74HC245TA.TR, which distributes key value data. The main chips U12-U14 of the keyboard interface unit are CD4066BM / TR, which output key values ​​to the LPG filling machine's keyboard. The digital isolation unit's main chip, U5, is a π162E30, essential for EMI, physically isolating the two power supply interfaces. The storage unit's main chip, U9, is a 24C02 / TR, storing device settings and address data. The TH-16P serves as the interface terminal for connecting to the LPG filling machine.

[0030] In the embodiment, the power supply unit is composed of power supply 1 and power supply 2. The main chip of power supply 1 in the power supply unit is LM7805S2 / TR. Power supply 1 is an AC-to-DC power supply with an input of AC220V and an output of +5V. Power supply 2 is an isolated power supply with an input of +5V and an output of +5V. The main chip of power supply 2 is B0505S-1WR3.

[0031] When in use, the LPG filling machine's gun control module connects to the machine's operating panel and keyboard via a data cable to achieve control. When the scanning device recognizes the unique identification code on the LPG cylinder to be filled, the single-chip microcomputer sends a compliance instruction via the LoRa wireless communication unit. Upon receiving the instruction, the LPG filling machine begins normal operation to fill the LPG cylinder. The keyboard interface unit receives the key control instructions from the single-chip microcomputer, monitors the status of the LPG filling machine's controlled keys in real time, and controls the enabling and disabling of function keys (such as the filling key) on the LPG filling machine's selected keyboard.

[0032] Multiple LPG filling machines can be networked through the LoRa wireless communication unit and RS-485 communication unit on the LPG filling machine gun control module, and connected to the production line management system, allowing managers to understand the working status of each LPG filling machine in the control room.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. LPG filling machine gun control module, characterized by: The system includes a single-chip microcomputer, a LoRa wireless communication unit, a panel communication unit, an RS-485 communication unit, a keyboard interface unit, a digital isolation unit, a storage unit and a power supply unit. The single-chip microcomputer is respectively connected to the panel communication unit, the RS-485 communication unit, the keyboard interface unit, the digital isolation unit, the storage unit and the power supply unit; the digital isolation unit is connected to the LoRa wireless communication unit; the power supply unit consists of a power supply 1 and a power supply 2. The power supply 1 is an AC-to-DC power supply with an input of AC220V and an output of +5V, and the power supply 2 is an isolated power supply with an input of +5V and an output of +5V; the panel communication unit includes a shift register and an eight-line main transceiver.

2. The gun control module of the LPG filling machine according to claim 1, characterized in that: The model of the single chip microcomputer is STC8A8K64-45I-LQFP64.

3. The gun control module of the LPG filling machine according to claim 1, characterized in that: The main chip of the LoRa wireless communication unit is ATK-MWCC68S; the main chip of the RS-485 communication unit is ADM2483.

4. The gun control module of the LPG filling machine according to claim 1, characterized in that: The main chip of the shift register is 74HC164, and the main chip of the eight-line bus transceiver is AIP74HC245TA.TR.

5. The gun control module of the LPG filling machine according to claim 1, characterized in that: The main chip of the keyboard interface unit is CD4066BM / TR.

6. The gun control module of the LPG filling machine according to claim 1, characterized in that: The main chip of the digital isolation unit is π162E30; the main chip of the storage unit is 24C02 / TR.

7. The gun control module of the LPG filling machine according to claim 1, characterized in that: The main chip of power supply 1 in the power supply unit is LM7805S2 / TR, and the main chip of power supply 2 is B0505S-1WR3.

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