1. Overview of quantitative loading controller
HY-C Flameproof Distributed Quantitative Loading Controller is a new type of intelligent explosion-proof explosion-proof instrument with advanced intelligent controller as the core. Its core components adopt world-renowned brand intelligent controllers and operation terminals, combined with general industrial control configuration software and advanced control algorithms, with high control accuracy, reliable performance, easy maintenance and use. At the same time, the loader provides a fully open communication protocol for easy interface with the user management system.
The quantitative loading controller is a general-purpose product, which can be matched with various flow meters, thermometers, liquid level switches, grounding switches, control valves, upper computers, etc., to form a complete distributed quantitative loading control system. The system can be operated stand-alone, operated and monitored by the operator on the spot; It can also be connected to the computer in the control room through the communication cable, and the loading operation control is realized by the computer, and the on-site loading situation is summarized in the control room for centralized management by the computer, and various loading reports are displayed and printed.
It is suitable for the control of liquid material loading, barreling, quantitative batching and other processes in petroleum, chemical, pharmaceutical and other industries.
The company provides users with high-quality service and reliable technical support.
2. Features and functions
The HY-C quantitative loading controller has the following functional characteristics:
1. A HY-C quantitative loading controller can control the oil generation of two oil crane pipes separately;
2. HY-C quantitative loading controller can control the ratio of materials;
3. It has a temperature compensation function, and there are two compensation methods: manual temperature setting and automatic temperature collection.
4. It has the function of electrostatic grounding protection, that is, it cannot start loading or stop loading immediately when it is not well grounded;
5. It has the function of oil spill protection, accepts the signal of the oil spill controller, automatically closes the valve and stops the pump;
6. It has an emergency stop function, that is, in the event of an emergency, press the "emergency stop" button to stop loading immediately;
7. It has two working modes: remote and local, and can be switched freely;
8. It has the function of power loss protection, that is, it saves the record of non-oil generation and other various parameters in the case of power outage, and can continue to load the vehicle according to the oil generation record before the power outage after power supply. The parameter storage time is more than one year;
9. Equipment self-test function, when the loading instrument fails, it will alarm and prompt;
10. The operation permission setting function can set a variety of operation permissions and multi-level passwords to ensure the security of data and system;
11. HY-C has an open communication protocol, which can communicate with the host computer or other systems through Ethernet protocol or MODBUS protocol;
3. Main technical indicators
1. Power supply
Input Power ...... 220VAC
Output Power ...... 220VAC or 24VDC (for peripheral sensors and actuators)
2. Input signal
Flow ...... 0~10KHz pulse signal
Compensate for temperature ...... It can be arbitrarily configured according to the site situation (generally recommended 0~100°C)
Valve Reply...... Passive contacts (current or voltage type, especially famous when ordering)
Level switch...... Passive contacts (current or voltage type, especially famous when ordering)
3. Output signal
Valve Control Signals...... Capacity 24VDC, 0.5/1A or 220VAC optional.
Control signal hold time...... 1~98 minutes or infinite length
Control logic...... Eight solenoid coils can be controlled, and the way and sequence of valve switches can be configured
4. Display mode
Full LCD display
5. Key structure
16 buttons (one machine), 24 buttons (two positions per machine)
6. Precision
System control accuracy......±0.1%
7. Set the amount
Quantitative setting range...... 1~999999 kg/l
Density setting range...... 0.0001～2.0000
Flow coefficient setting range...... 0.1000～99999
The expansion coefficient sets the range...... 0.1000～1000×10-6/℃
8. Operation mode
Continuous operation
9. Communication
(1) RS485 mode
MODBUS protocol
Baud rate...... 1200、2400、4800、9600
Maximum distance...... 1.2KM
(2) Ethernet mode
TCP/IP protocol
Hundreds of kilometers are transmitted using optical fiber
10. Conditions of use
Ambient temperature ......-40~70°C
Air relative humidity...... Not more than 95%
Explosion class II and class B of combustible gas or flammable gas mixtures in the environment
11. Storage temperature
-40～60℃
12. Explosion-proof level
ExdⅡBT4
13. Overall dimensions
440mm×350mm× 150mm (length× width× height) one machine
440mm×350mm× 170mm (length×width× height) two positions in one machine
14. Weight
15kg (one person per machine)
18kg (two people in one machine)
4. Working principle
1. Hardware composition
The system hardware is mainly composed of intelligent controller module, integrated LCD operation panel, 24V industrial power supply, explosion-proof control box, etc. The intelligent controller mainly completes the data collection, conversion, logic operation and control signal output. The integrated LCD operation panel includes a keyboard and an LCD display, which is mainly used for data input and operations such as starting, stopping, etc.
2. Traffic collection and accumulation
The HY-C type quantitative loading controller can be connected to various flow meters according to the user's requirements. The output signal of the general flowmeter adopts the pulse mode, the falling edge is triggered, and the frequency range: 0~10KHz. Reserve 4~20mA flowmeter interface. It is convenient for users to choose, set the advance coefficient, and can set the time advance amount (0~99 seconds) or advance quantity (0~500 kg or liter) to achieve accurate sending of materials.
3. Control and return message of valves and pumps
The delay time (0~99 seconds or minutes) of the control switches of the four groups of valves can be entered by the panel according to the prompts of the operation panel. When the set time is reached, the loader automatically opens the valve, and when the loading is completed, the loader automatically closes the valve according to the delay time. Different control methods are adopted according to different on-site control situations. The start and stop control method of the pump is also the same as that of the valve. The switching status of valves and pumps can be displayed graphically on the operation panel in real time.
4. Temperature input and temperature compensation
The loader adopts an integrated temperature sensor signal, generally 4~20mA, which is used for automatic compensation calculation of system temperature. Convert the volumetric flow rate at the actual temperature of the pipeline at t°C to the standard volume flow rate at 20°C:
Q=q【1-r(t-20)】
where Q is the volumetric flow rate at 20°C; q is the volume flow rate at the detected t°C; r is the expansion coefficient; The temperature of the flow rate in the pipeline changes continuously, so when compensating for the calculation, the cumulative flow rate in a short period of time is taken to calculate the standard volume flow rate in that time, and then the total volume flow rate can be calculated by doing integral operation. If calculated by weight, the weight of the liquid is W=Q*Db, where Db is the standard density value of the liquid at 20°C.
5. Chain and alarm
The liquid level switch is installed slightly higher than the tank car level alarm. When the loading liquid level exceeds the liquid level alarm and reaches the installation position of the liquid level switch, the liquid level switch sends a signal, the loader closes all valves, sends an alarm bell, and displays the alarm information on the operation panel.
In order to avoid fire accidents caused by excessive static electricity accumulation caused by friction between materials and air during loading, tank trucks are required to have a good grounding system. After the loader starts, the grounding alarm signal is first detected, if it is greater than the specified grounding resistance (100 ohms), the grounding alarm bell will be issued, refusing to perform loading, and the operation panel will display the grounding alarm information.
The explosion-proof operator is a new intelligent explosion-proof instrument with intelligent controller as the core.
1. Industrial-grade core intelligent controller
2. Industrial-grade integrated LCD screen operation terminal
3. Quantitative loading and barreling of liquid materials in petroleum, chemical, pharmaceutical and other industries
4. Quantitative batching and quantitative control of other processes in the production process
Its characteristics: simple structure, performance and stability; Modular design and easy maintenance; Provide standard RS485 and RJ45 communication interfaces; Provide standard MODBUSRTU and TCP/IP protocols to facilitate networking, configuration, and other PLCDCS system communication; It provides a variety of data acquisition connectors such as pulse input and AIAODI]DO, which can be used in a wide range of applications.
Key features:
1. Automatic oil generation and centralized management function: it can realize the automation of the oil generation process, and ensure that the loading accuracy is ± more than 0.2% and improve production efficiency
2. Safety alarm protection function: It can realize various fault alarms, as well as electrostatic oil spill protection and emergency stop protection
3. Loading process monitoring function: online monitoring of the oil production status of each crane position
4. Ticket exchange and fuel issuance: can be customized to print loading tickets, and store these tickets, with password recognition function
5. Offline loading function: when the upper machine cannot be operated, it can be easily switched to the site for on-site loading
6. Management function: accept the production data and production plan of the superior management network to arrange production, generate reports and purchase, sales and inventory system
7. Communication networking function: provide standard DDE and OPC interfaces, which can easily communicate with DCSERP and other control and management systems
Key features:
1. AWZ type quantitative loading controller with domestic price and imported performance
2. Unique Ethernet and RS485 two optional networking methods
3. The communication between the host computer and the loader adopts standard TCP/IP and MODBUSRTU methods
4. The host computer software can use general configuration software for easy maintenance
5. Flexible configuration method, no need to worry about the selection of on-site instruments
6. Both the upper and lower computers are completely Chinese environments
7. Easy to expand and integrate with modern network technology
AWZ explosion-proof quantitative loading controller
AWZ explosion-proof distributed quantitative loading controller (hereinafter referred to as AWZ quantitative loading controller) is a new intelligent explosion-proof instrument with intelligent controller as the core.
Equipment structure:
1. Industrial-grade core intelligent controller
2. Industrial-grade integrated LCD screen operation terminal
3. Other industrial accessories
Applications:
1. Quantitative loading and barreling of liquid materials in petroleum, chemical, pharmaceutical and other industries;
2. Quantitative batching and quantitative control in the production process
Key features:
1. Data collection and quantitative control functions
2. Parameter setting and sequence control function
3. Oil spill chain, grounding chain, emergency stop chain, and power loss protection function
4. Remote/on-site loading conversion function
5. Real-time monitoring and alarm functions
6. Communication networking function
7. Device self-test and password protection function
Key features:
1. Simple structure and extremely stable performance
2. Modular design and easy maintenance
3. Provide standard RS485 and RJ45 communication interfaces
4. Provide standard MODBUSRTU and TCP/IP protocols for networking, configuration and communication with other PLC, DCS and other systems
5. Provide pulse input, AI, AO, DI, DO, and other data acquisition interfaces, with a wide range of uses
Technical Instructions:
Overview of the loading skid:
Skid-mounted equipment (skid-mounted literally translated is "mounted on a sliding bottom plate", taken from "sled") skid-mounted refers to fixing a group of equipment on a chassis made of angle steel or I-beam, which can be moved and positioned by skid-mounted and modern lifting equipment.
Loading sled refers to the integration of loading controller, flowmeter valve, pipeline, auxiliary equipment, crane pipe, intermediate connectors, cables, trays, etc. on an integral steel structure platform, only reserving process connection ports and control power supply and communication interfaces, this overall integration part is called loading skid.
Key features:
1》Flexible and small size
Skid-mounted equipment is generally optimized in the factory, so it is small in size, and it is made into one by using skid-mounting
Overall, it is more convenient to move, relocate, etc.
2》High integration ratio, easy to install and maintain
The loading skid will control the instrument, flow meter, valves, pipes, accessories, crane pipes, intermediate connectors and electricity
The cable, tray, etc. are integrated, which is easy to install on site and easy to maintain as a whole.
3》Eliminate the trouble of on-site installation, low cost and short construction period
The loading skid eliminates the tedious and manufacturing time of traditional on-site process installation and instrument installation, and is made in the factory
It is more convenient to make and test, find problems and rectify them, and the quality can be more guaranteed.
Types of loading sled sets:
In the process of regular use, the loading skid group is divided into the following categories according to the different mediums and their loading and unloading methods:
底部装车橇装组 顶部装车橇装组 活动式装车橇装组
There are two types of bottom-loading skid groups:
1. Gas-liquid two-phase closed loading skids such as alkanes, hydrocarbons, ammonia, ethers, etc.
2. Refined oil bottom closed loading skid
Comparison of loading skids and traditional field installations
