CN103213854A - Fast loading device for program control measuring - Google Patents

Abstract

The invention relates to an electronic weighing device, in particular to a program-controlled measuring and quick loading device. The program-controlled metering and quick-loading device includes a storage hopper, a hopper scale, a discharge hopper, a load-bearing frame for supporting the storage hopper and the hopper scale, and a control system. The control system includes a feed gate, a discharge gate, and a hydraulic control system. , input/output control box, weighing display controller and remote control computer, the feed gate and discharge gate are hydraulically driven; the input/output control box installed on the storage hopper provides the weighing sensor at the bottom of the hopper Power supply, the state output signal of the feeding gate, the discharge gate and the output signal of the weighing sensor are connected to the weighing display controller through the input/output control box; the remote control computer is connected to the weighing display controller through the communication interface and input/output control box. The program-controlled metering quick-loading device of the present invention has the advantages of accurate metering, reliable operation, convenient operation and stable performance, and significantly improves the automatic degree of quantitative loading.

Description

Program-controlled metering and quick loading device

technical field

The invention relates to an electronic weighing device, in particular to a program-controlled measuring and quick loading device.

Background technique

Electronic weighing devices are widely used in various fields such as coal, chemical industry, construction, cement, etc., for the measurement of materials and production batching. However, most of the current weighing devices are crawler continuous measurement. First, the measurement accuracy is not high and the error is relatively large. Second, the use is limited. There is also a combination of silo discharge and weighbridge measurement. This loading measurement method is also very inconvenient and cannot be loaded quantitatively, so it is not suitable for quantitative loading in the transportation industry.

Contents of the invention

Aiming at the inconvenience of the metering and loading methods in the prior art, the present invention proposes a program-controlled metering and quick-loading device, which is controlled by a computer and supplied according to the quantity to complete the metering and loading at one time.

The technical scheme adopted in the present invention:

A program-controlled metering and quick-loading device, comprising a storage hopper (1), a hopper scale (2), an unloading hopper (3), a load-bearing frame (4) for supporting the storage hopper and the hopper scale, a control system, and the control system The system includes a feed gate (5), a discharge gate (6), a hydraulic control system, an input/output control box (7), a weighing display controller and a remote control computer, and the feed gate is installed in a storage hopper (1 ), the discharge gate (6) is installed at the bottom of the hopper scale (2), the feed gate and discharge gate are driven by hydraulic pressure, and a proximity switch is used to detect the switch state of the gate, the feed gate and discharge gate The drive cylinder of the gate is connected with the hydraulic control system, and the input/output control box (7) installed on the storage hopper (1) provides power for the weighing sensor at the bottom of the hopper scale (2). The status output signal of the load cell and the output signal of the weighing sensor are connected to the weighing display controller through the input/output control box (7); the output signal of the weighing display controller is connected to the The electromagnetic valves of the material gate and the discharge gate; the remote control computer is connected with the weighing display controller and the input/output control box (7) through the communication interface.

In the program-controlled metering and quick-loading device, a vibrator is installed on the hopper scale (2), and the control system includes a control circuit of the vibrator.

In the program-controlled metering and quick-loading device, the connecting parts of the storage hopper (1) and the hopper scale (2) as well as the hopper scale (2) and the discharge hopper (3) are provided with a soft connection filter cloth, which is connected to the hopper scale (2) It is connected and equipped with a dust suction device (9) to prevent flying dust from entering the weighing chamber.

The program-controlled metering and quick loading device is provided with an air balance tube (10) in cooperation with the storage hopper (1), and an automatic vacuum door and its control mechanism are provided in cooperation with the air balance tube (10). The mechanism is controlled and connected to the control system, and when feeding and unloading, the air is allowed to enter the balance pipe through the automatic vacuum door to compensate for the air pressure difference during dust discharge.

In the program-controlled metering and quick-loading device, heating cables are installed on the surface of the storage hopper (1), and a level gauge is installed inside the storage hopper. The control circuit of the heating cables is connected to the control system, and the output of the level gauge Signals are also fed into the control system.

Beneficial positive effect of the present invention:

1. The program-controlled metering and quick-loading device of the present invention has high metering accuracy, stable performance, reliable operation, convenient operation, and significantly improves the automation degree of quantitative loading. A batch of bulk coal to be weighed is automatically divided into thousands of discontinuous loads to be weighed, each weight is weighed in turn, all weighing results are accumulated, and the weighed materials are discharged in sequence. Its metering performance accuracy level meets the requirements of level 0.2 in OIML R107. It can be used for trade settlement and batching control in the production process. It is the first choice for modern storage, port and other enterprises to measure bulk materials with high precision. It is suitable for automatic weighing and loading of solid granular materials, customized loading on demand, one-time loading, fast loading, accurate measurement, less labor input, high degree of mechanization, and high efficiency.

2. The program-controlled metering and quick-loading device of the present invention can perform corresponding technical treatment for abrasive and corrosive materials such as coal, cement, iron ore, etc., so as to meet the user's use requirements to the greatest extent. For example, by installing polymer wear-resistant linings on the wear-resistant parts of the feed hopper and weighing hopper, the wear resistance of the equipment is improved, and the long-term stability and reliability of the scale body are enhanced.

3. The program-controlled metering and quick-loading device of the present invention is equipped with a vibrator on the hopper scale, which can empty the scale body and avoid the phenomenon of material accumulation in view of the coal has a certain water content and poor fluidity. By installing heating cables on the surface of the silo, it can ensure that the temperature of the silo is at a constant temperature (the temperature can be adjusted, the temperature is higher than the set range to stop heating, and the temperature is lower than the set range to automatically heat), effectively ensuring the loading speed and loading quality . It overcomes the problem of unsmooth unloading caused by moisture in the coal and condensation on the surface of the steel structure caused by the condensation of moisture in the coal and the surface of the steel structure when the equipment is loaded in winter.

4. The program-controlled metering and quick-loading device of the present invention has a good dust-proof effect. A soft connection filter cloth is provided at the junction of the storage hopper and the hopper scale, and the hopper scale and the unloading hopper, and is connected with the hopper scale and provided with The dust suction device can effectively prevent flying dust from entering the weighing chamber.

5. The program-controlled metering and quick-loading device of the present invention is provided with a magnetic start-up control system on the upper end of the bucket body in the middle of the hopper scale, and the balance of the scale body and the information provided by the weighing sensor are processed by computer data to control the storage bin When the gate is opened and closed, and the scale body is unbalanced, the storage bin is guaranteed to be closed, and at the same time passed to the vibrator and the hydraulic control system to adjust the position and state until it is balanced before it can be automatically opened (self-adjusting weighing, opening the valve unloading effect).

6. The program-controlled metering and quick-loading device of the present invention is equipped with a hydraulic control system at the bottom of the hopper scale and the weighing platform, which mainly solves the imbalance problem caused by the materials in the hopper scale, and is connected with the computer database to ensure the balance of the scale body. Make sure the weighing measurement is accurate.

Description of drawings

Figure 1: Schematic diagram of the structure of the program-controlled metering and quick-loading device of the present invention;

Fig. 2: The principle block diagram of the control system of the program-controlled metering and quick-loading device of the present invention.

Detailed ways

Embodiment 1: Referring to Fig. 1 and Fig. 2, the program-controlled metering and quick-loading device of the present invention includes a storage hopper 1, a hopper scale 2, an unloading hopper 3, a load-bearing frame 4 for supporting the storage hopper and the hopper scale, and a control system, The control system includes a feed gate 5, a discharge gate 6, a hydraulic control system, an input/output control box 7, a weighing display controller and a remote control computer. The material gate 6 is installed at the bottom of the hopper scale 2, the feed gate and the discharge gate are hydraulically driven, and a proximity switch is used to detect the switch state of the gate, and the driving cylinders of the feed gate and the discharge gate are connected to the hydraulic control system , the remote input/output control box 7 installed on the storage hopper 1 provides power for the load cell 12 at the bottom of the hopper scale 2, and the state output signals of the feeding gate and the discharge gate and the output signal of the load cell pass through The input/output control box 7 is connected to the weighing display controller; the output signal of the weighing display controller is connected to the solenoid valve of the feeding gate and the discharge gate through the input/output control box 7; The communication interface connects the weighing display controller and the input/output control box 7 .

The load-bearing frame 4 is a frame supporting the load cell 12 and the weighing bucket, and the hopper scale 2 is installed through the weighing platform 13 . There is a flange with anchor bolt holes on each corner of the load-bearing frame 4, so that anchor holes can be made on the flange without moving the support. The junction boxes for the proximity switches and sensors that detect the closed position of the discharge gate are mounted on this bracket.

There are one or two fan-shaped discharge gates at the bottom of the hopper scale 2, which are driven by an oil cylinder, and the oil cylinder is controlled by a solenoid valve. The closed position of the discharge gate is detected by a proximity switch.

There are also weight platforms (one on each side) on both sides of the hopper scale for placing test weights. These weights are used to calibrate the scales during commissioning and first qualification and subsequent inspections by the metrology department. It is also possible to suspend a platform for test weights from the weighing bucket and place it at a lower level (e.g. on the floor) to simplify the testing process.

The two feeding gates at the bottom of the storage hopper 1 are driven by two oil cylinders, which are controlled by electromagnetic valves. The opening position of the feeding gate is detected by the proximity switch, and the feeding speed is determined by the opening of the feeding gate. According to the size of the material density, the value of the coarse feed and fine feed of the material can be set to optimize the weight of the ingredients. A two-stage feed rate adjustment is performed.

The hydraulic control system includes hydraulic components such as oil cylinders, solenoid valves, regulators, pressure gauges, pipe joints and oil pipes installed on the scale body. The working pressure is within the specified range.

The remote input/output control box (RIO) provides power for the MICX junction box (connected to the load cell), and is connected to the weighing display controller at the same time. The input and output signals of the hopper scale, such as the feed gate, discharge gate and level gauge signals, are all controlled by the RIO. The interface program chip is equipped with a short-circuit protection input circuit, and the output signal is provided by a relay.

The weighing display controller realizes the collection of material weight signals, and is generally placed near the hopper scale, and can also be installed in the centralized control room.

As the heart of the control system, the remote control computer terminal is connected with the weighing display controller and the RIO control box through the RS232 or Rs485 communication port, reads the weighing data and sends out relevant instructions, the control system works normally, and the working status of the system is displayed on the display interface displayed above. The operator enters process parameters and necessary operating data through the keyboard to realize man-machine dialogue. Handler software including user dialogs (process and configuration parameters, test and inspection methods, etc.), control of weighing data, process monitoring, fault detection and signaling systems. An external printer can be connected to print the weighing data and corresponding process parameters.

The working process of the program-controlled metering and quick-loading device of the present invention is as follows: The initial state of the system is: the maintenance gate is opened, and the feeding gate and unloading gate are closed. The operator enters the loading weight into the computer operating system, turns the "manual/automatic" button to "automatic" and then presses the "start" button, the feeding gate opens, and the coal flows from the raw material bin to the weighing hopper (feeding cycle ), after the coal enters the weighing hopper, its weight signal is converted into an analog signal by the sensor and sent to the weighing display controller, and then converted into a digital signal by pre-amplification and A/D conversion and displayed on the instrument in real time. The computer system analyzes and calculates the data and transmits the results to the PLC for control; when the coal weight reaches the set maximum weight, the feeding gate is closed, and the system opens after recording the weight of coal in the weighing hopper The discharge gate discharges the coal from the weighing hopper into the vehicle (discharge cycle). After the weighing hopper is filled with material, the discharge door is closed, and the controller records the weight of the remaining material in the weighing hopper (tare weight record).

After recording the gross weight and tare weight, the program calculates the net weight of the material and starts the next weighing. After each weighing, its net weight is added to the previous accumulated net weight. When the accumulated net weight reaches the loading weight, the weighing process will automatically stop operation. For long car loading, two scales can be controlled by computer to load at the same time.

Embodiment 2: Referring to FIG. 1 , the program-controlled metering and quick-loading device of this embodiment is based on Embodiment 1. A vibrator is installed on the hopper scale 2, and the control system includes a control circuit for the vibrator. In view of the characteristics of coal having a certain water content and poor fluidity, by installing a vibrator on the equipment, the scale body can be emptied to avoid the phenomenon of material accumulation.

Embodiment 3: Referring to FIG. 1, the program-controlled metering and quick-loading device of this embodiment is different from Embodiment 1 or Embodiment 2 in that: further, an air balance tube 10 is provided in conjunction with the storage hopper 1, and the The air balance pipe 10 is equipped with an automatic vacuum door and its control mechanism. The control mechanism is controlled and connected to the control system. When feeding and unloading, air is allowed to enter the balance pipe through the automatic vacuum door to compensate for dust discharge. Air pressure difference.

The program-controlled metering and quick-loading device of the present invention is provided with a soft connection filter cloth through the connecting parts of the storage hopper 1 and the hopper scale 2, and the hopper scale 2 and the discharge hopper 3, and is connected with the hopper scale 2 to be provided with a dust suction device 9, which can Play a dust-proof role to prevent flying dust from entering the weighing chamber.

When the equipment is loaded in winter, because the temperature is too low, the water in the coal and the surface of the steel structure will condense, causing unsmooth unloading. For this reason, heating cables are installed on the surface of the storage hopper 1 to ensure that the temperature of the silo is at a constant temperature (the temperature Can be adjusted, the temperature is higher than the set range to stop heating, and the temperature is lower than the set range to automatically heat), effectively ensuring the loading speed and loading quality.

A material level gauge is installed inside the storage hopper, and the output signal of the material level gauge is also connected to the control system.

By installing polymer wear-resistant linings on the wear-prone parts of the feed hopper and weighing hopper, the wear resistance of the equipment can be improved, and the long-term stability and reliability of the scale body can be enhanced.

The program-controlled metering quick-loading device of the present invention is installed and used indoors, and should have reliable windproof and waterproof measures. The scale installation should be easy to access for operation and maintenance personnel. At least 1.5 meters of space should be left around the scale for installation, calibration and maintenance. The ambient air should be free of corrosive gases and dust particles, because they will have a corrosive effect on the processing surface of the scale body, and condensation of air on or inside the scale body should be avoided.

The bottom of the hopper scale 2 and the weighing platform 13 are provided with a hydraulic balance system 14. The hydraulic balance system 14 is connected to the computer database and can solve the imbalance problem caused by the materials in the hopper scale to ensure the balance of the scale body and ensure Accurate weighing and measuring.

By setting the magnetic force start control system 8 on the upper end of the hopper body in the middle of the hopper scale 2, the balance of the scale body and the information provided by the load cell are processed by the computer to control the opening and closing of the gate of the storage bin and the unbalance of the scale body At the same time, ensure that the storage bin is closed, and at the same time pass it to the vibrator and hydraulic control system to adjust the position and state. Number 11 in Fig. 1 is the inspection channel.

Claims (6)

1. program control metering quick-mounting device, comprise storage bin hopper (1), hopper claims (2), discharge hopper (3) and being used to supports the load-bearing frame (4) that described storage bin hopper and hopper claim, control system, it is characterized in that: described control system comprises gate (5), discharge gate (6), hydraulic control system, I/O control box (7), weighing displaying controller and remote control computer, described gate is installed in the bottom of storage bin hopper (1), discharge gate (6) is installed in the bottom that hopper claims (2), described gate and discharge gate adopt hydraulic-driven, and adopt near switch and detect the knife switch state, the driving oil cylinder of described gate and discharge gate is connected with hydraulic control system, the I/O control box (7) that is installed on the storage bin hopper (1) provides power supply, described gate for hopper claims the LOAD CELLS of (2) bottom, the state output signal of discharge gate and the output signal of LOAD CELLS insert weighing displaying controller by described I/O control box (7); The weighing displaying controller output signal connects the electromagnetic valve of gate and discharge gate by described I/O control box (7); Described remote control computer connects weighing displaying controller and I/O control box (7) by communication interface.

2. program control metering quick-mounting device according to claim 1 is characterized in that: claim on (2) vibrator to be installed the control circuit of described control system involving vibrations device at described hopper.

3. program control metering quick-mounting device according to claim 1, it is characterized in that: described storage bin hopper (1) and hopper claim (2) and hopper to claim the junction of (2) and discharge hopper (3) to be provided with the filter cloth that is flexible coupling, claim (2) to be connected with described hopper and be provided with dust eliminating equipment (9), enter weighing chamber with the dust that prevents to fly upward.

4. program control metering quick-mounting device according to claim 2, it is characterized in that: described storage bin hopper (1) and hopper claim (2) and hopper to claim the junction of (2) and discharge hopper (3) to be provided with the filter cloth that is flexible coupling, claim (2) to be connected with described hopper and be provided with dust eliminating equipment (9), enter weighing chamber with the dust that prevents to fly upward.

5. according to each described program control metering quick-mounting device of claim 1～4, it is characterized in that: cooperate with described storage bin hopper (1) to be provided with air balance pipe (10), cooperate with described air balance pipe (10) and to be provided with automatic vacuum door and control mechanism thereof, the described control system of the controlled connection of described control mechanism, in reinforced and discharging, allow the air admission equalizing pipe with complemental air pressure reduction when the dust discharge by the automatic vacuum door.

6. program control metering quick-mounting device according to claim 5, it is characterized in that: at described storage bin hopper (1) mounted on surface heating tape, storage bin hopper inside is equipped with level-sensing device, and described heating tape control circuit inserts described control system, and the output signal of described level-sensing device also inserts described control system.

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