Large-flow filling industrial pump control system and method

Abstract

The invention discloses a large-flow filling industrial pump control system and method. The system comprises a pumping system, a power system and an electric control system. The power system comprises an oil tank, the oil tank is connected with a motor oil pump, and the motor oil pump is connected with a main oil way control valve; the pumping mechanism comprises a main oil cylinder, the main oil cylinder is connected with a main oil way control valve and a conveying cylinder, the conveying cylinder is connected with a swing valve, the swing valve is connected with a hopper, the swing valve is further connected with a distribution valve, and the distribution valve is connected with a conveying pipeline. The large-flow filling industrial pump control system further comprises an electric control system, the electric control system comprises a PLC, the PLC is connected with the motor oil pump, the main oil way control valve and the swing valve oil cylinder, and the control system further comprises a power source, communication equipment and a touch screen which are connected with the PLC. The system equipment adopts a complete machine split type design, consists of three parts, namely a pumping mechanism, a power unit and an electric control system, meets the requirements of large flow and high pressure, and is flexible to mount and arrange, high in adaptability and convenient to maintain.

Description

Technical Field

[0001] The invention belongs to the technical field of mining engineering, and in particular relates to a control system and method for a large-flow filling industrial pump. Background Art

[0002] With the development of mining machinery, mine filling pipeline technology has become an indispensable technology in mining. Industrial filling pumps used for high-concentration slurry transportation operations are widely used in high-concentration slurry discharge in mines, coal mine filling mining, tailings filling mining of metal mines and non-metallic mines, wastewater treatment and solid waste treatment in the metallurgical and petrochemical industries.

[0003] The filling pump must meet the needs of the coal mine paste filling process of pumping water - pumping mortar - pumping gangue slurry - pumping mortar - pumping water - pumping air. Traditional filling pumps are limited by flow rate and it is difficult to achieve long-term continuous operation conditions, and it is difficult to meet the needs of high-transportation projects. To solve this problem, it is generally necessary to configure multiple preparation systems to run simultaneously to ensure a set of pumping filling systems. There are defects such as a large number of equipment, high energy consumption, and low efficiency, and the degree of intelligence and automation is low, and it is impossible to achieve on-site and remote control, dynamically control the pumping system and realize correction. Summary of the invention

[0004] The present invention aims to overcome the shortcomings of the existing filling industrial pump system and provide a large-flow filling industrial pump control system and method.

[0005] In order to achieve the above object, the technical solution provided by the present invention is: The large-flow filling industrial pump control system comprises a pumping system, a power system, and an electronic control system; the power system comprises an oil tank (1), the oil tank (1) is connected to a motor oil pump (2), and the motor oil pump (2) is connected to a main oil circuit control valve (3); the pumping system comprises a main oil cylinder (4), the main oil cylinder (4) is connected to the main oil circuit control valve (3), the main oil cylinder (4) is connected to a delivery cylinder (5), the delivery cylinder (5) is connected to a swing valve (6), the swing valve (6) is connected to a hopper (7), the swing valve (6) is also connected to a distribution valve, and the distribution valve is connected to a delivery pipeline; the large-flow filling industrial pump control system also comprises an electronic control system, the electronic control system comprises a PLC, the PLC is connected to the motor oil pump, the main oil circuit control valve, and the swing valve oil cylinder, and the control system also comprises a power supply, a communication device, and a touch screen connected to the PLC.

[0006] Preferably, the master oil cylinder (4) is connected to a water tank (8), and the water tank (8) is connected to a delivery cylinder (5).

[0007] Preferably, the large-flow filling industrial pump control system further comprises a cooling system, the cooling system comprising an air cooler, the air cooler being connected to the oil return line of the main oil circuit control valve (3), and the oil return line of the main oil circuit control valve (3) being further connected to a filter.

[0008] Preferably, the power system comprises a plurality of groups of motor oil pumps (2), wherein the plurality of motor oil pumps (2) are arranged in parallel and are respectively connected to a main oil circuit control valve (3).

[0009] Preferably, a double mixer (9) is provided in the hopper (7), and the mixing device is connected to a PLC.

[0010] Preferably, the distribution valve is an S-type tube valve.

[0011] Preferably, the main oil circuit control valve (3) comprises an electro-hydraulic reversing valve, a distribution hydraulic reversing valve, and a main overflow valve.

[0012] Preferably, a manual emergency operating device is provided on the main oil circuit control valve (3).

[0013] Preferably, the PLC is connected to the host computer via Ethernet.

[0014] The large flow filling industrial pump control method based on the large flow filling industrial pump control system comprises the following steps: (1) Start the filling pump and enter the preset value in the control system; (2) The system self-checks whether the liquid level and temperature of the oil tank (1) and the material level in the hopper (7) are consistent with the preset values. If a fault occurs, the power system is shut down; (3) Start the pumping system and open the main oil circuit control valve (3), swing valve (6), oil cylinder, and dual mixer (9) in sequence; (4) Check whether the pressure value in the delivery pipeline is consistent with the preset value. If a fault occurs, shut down the power system; (5) The filling industrial pump operates normally.

[0015] The present invention will be further described below: The filling industrial pump of the present invention works as follows: The core of the working part of the S-tube valve filling industrial pump is the pumping system, which is mainly composed of the main oil cylinder, water tank, material piston, delivery cylinder, swing mechanism, stirring mechanism, hopper and S-tube valve. The hydraulic oil pump is driven by a motor, and the oil is converted from mechanical energy to hydraulic energy to enter the piston rod of the main oil cylinder to move back and forth, while the material piston in the delivery cylinder is connected to the main oil cylinder and also makes a reciprocating linear motion with the main oil cylinder; when the piston rod of the main oil cylinder drives the material piston to retreat, the paste material is sucked into the delivery cylinder; when the piston rod of the main oil cylinder drives the material piston forward, the paste material first sucked into the delivery cylinder is pressed into the delivery pipeline through the S-tube valve.

[0016] The S-tube triggers the induction switch when the cylinder piston stroke reaches the end. The induction switch outputs a signal to the PLC, which issues a command to control the free switching of the main cylinder and the swing cylinder, forming a cyclic repetitive motion.

[0017] When the pump is reversed, the conveying cylinder in the suction stroke is connected to the S pipe through the reverse pump operation, and the conveying cylinder in the propulsion stroke is connected to the hopper, so that the paste material in the pipeline is drawn back to the hopper.

[0018] This system adopts an open hydraulic system; a multi-pump confluence hydraulic system, the most advanced electro-hydraulic proportional reversing control technology; a multi-pump combined flow system technology, constant power control; the pumping reversing adopts electro-hydraulic combined step-down buffer reversing technology, stable flow output, swing mechanism, reasonable distribution of the maximum point energy output of the cylinder, solves the problem of S swing pipe locking, etc., the end of the cylinder adopts a swing valve cylinder with buffer and adjustable buffer effect, small impact and low noise; the hydraulic valve group is of excellent quality and easy to maintain. The main circuit adopts a large-flow electric control reversing valve, with a maximum flow of 3500L / min and a pressure of 350bar. Four groups are connected in parallel and integrated on a bottom block, with good synchronization and durability and high reliability.

[0019] It adopts automatic lubrication technology with hydraulic six-way synchronous control. The piston adopts thin oil lubrication system to extend the service life of the piston. The other moving parts are lubricated with dry oil. The lubrication system has its own lubrication blockage alarm device, hydraulic oil level and hydraulic oil temperature alarm device.

[0020] Control system: PLC control technology and field industrial bus technology are used to complete the automatic control of the filling pump system. The PLC control part includes CPU, power module, analog input module, analog output module, switch input module, switch output module, communication module, etc. The most advanced communication protocol profinet or profibus is used, which has fast speed, universal transmission medium, convenient debugging, easy system integration and upper computer management, and is directly connected to the main control system by communication, which is convenient for connection with the production management system. The structure is simple, the networking is flexible, and the overall performance is reliable. The operating equipment adopts keyboard and touch screen operation display terminal, and provides a full Chinese interface for simple operation. The alarm log provided can record events, information and alarms, which is convenient for equipment maintenance.

[0021] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a control system and method for a large-flow filling industrial pump. The system equipment adopts a whole-machine split design, and is composed of three major parts: a pumping mechanism, a power unit, and an electronic control system. The installation layout is flexible, the adaptability is strong, and the maintenance is convenient. The large-volume hopper is welded with wear-resistant steel plates and adopts an arc-shaped design, which does not accumulate materials, has a large maintenance space, and is easy to clean and maintain. The control system has functions such as real-time monitoring, fault diagnosis, and overload protection. A large-mouth S-type distribution valve is used, and the suction efficiency is high. In short, the unification of equipment and methods is achieved, the number of systems and equipment is reduced, the system energy consumption and investment are reduced, and the system efficiency and reliability are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the pumping system structure of the large flow filling industrial pump control system of the present invention; Figure 2 This is a schematic diagram of the power system structure of the large-flow filling industrial pump control system of the present invention.

[0023] In the figure: 1. Oil tank; 2. Motor oil pump; 3. Main oil circuit control valve; 4. Main oil cylinder; 5. Delivery cylinder; 6. Swing valve; 7. Hopper; 8. Water tank; 9. Double mixer. DETAILED DESCRIPTION

[0024] See also Figure 1 to Figure 2 The large-flow filling industrial pump control system includes a pumping system, a power system, and an electronic control system; the power system includes an oil tank 1, the oil tank 1 is connected to the motor oil pump 2, and the motor oil pump 2 is connected to the main oil circuit control valve 3; the pumping system includes a main oil cylinder 4, the main oil cylinder 4 is connected to the main oil circuit control valve 3, the main oil cylinder 4 is connected to the delivery cylinder 5, the delivery cylinder 5 is connected to the swing valve 6, the swing valve 6 is connected to the hopper 7, the swing valve 6 is also connected to the distribution valve, and the distribution valve is connected to the delivery pipeline; the large-flow filling industrial pump control system also includes an electronic control system, the electronic control system includes a PLC, the PLC is connected to the motor oil pump, the main oil circuit control valve, and the swing valve oil cylinder, and the control system also includes a power supply, communication equipment, and a touch screen connected to the PLC.

[0025] Among them, the main oil cylinder 4 is connected to the water tank 8, and the water tank 8 is connected to the delivery cylinder 5; the large-flow filling industrial pump control system also includes a cooling system, and the cooling system includes an air cooler, and the air cooler is connected to the return oil circuit of the main oil circuit control valve 3, and the return oil circuit of the main oil circuit control valve 3 is also connected to the filter; the power system includes multiple groups of motor oil pumps 2, and the multiple motor oil pumps 2 are arranged in parallel and are respectively connected to the main oil circuit control valve 3; a double mixer 9 is provided in the hopper 7, and the stirring device is connected to the PLC; the distribution valve adopts an S-type pipe valve; the main oil circuit control valve 3 includes an electro-hydraulic reversing valve, a distribution hydraulic reversing valve, and a main overflow valve; the main oil circuit control valve 3 is provided with a manual emergency operation device; the PLC is connected to the host computer via Ethernet.

[0026] The large flow filling industrial pump control method based on the large flow filling industrial pump control system comprises the following steps: (1) Start the filling pump and enter the preset value in the control system; (2) The system self-checks whether the liquid level and temperature of the oil tank 1 and the material level in the hopper 7 are consistent with the preset values. If a fault occurs, the power system is shut down; (3) Start the pumping system and open the main oil circuit control valve 3, the swing valve 6 cylinder, and the double mixer 9 in sequence; (4) Check whether the pressure value in the delivery pipeline is consistent with the preset value. If a fault occurs, shut down the power system; (5) The filling industrial pump operates normally.

Claims

1. A large flow filling industrial pump control system, characterized in that: The large-flow filling industrial pump control system comprises a pumping system, a power system, and an electronic control system; the power system comprises an oil tank (1), the oil tank (1) is connected to a motor oil pump (2), and the motor oil pump (2) is connected to a main oil circuit control valve (3); the pumping system comprises a main oil cylinder (4), the main oil cylinder (4) is connected to the main oil circuit control valve (3), the main oil cylinder (4) is connected to a delivery cylinder (5), the delivery cylinder (5) is connected to a swing valve (6), the swing valve (6) is connected to a hopper (7), the swing valve (6) is also connected to a distribution valve, and the distribution valve is connected to a delivery pipeline; the large-flow filling industrial pump control system also comprises an electronic control system, the electronic control system comprises a PLC, the PLC is connected to the motor oil pump, the main oil circuit control valve, and the swing valve oil cylinder, and the control system also comprises a power supply, a communication device, and a touch screen connected to the PLC.

2. The large flow filling industrial pump control system as claimed in claim 1, characterized in that: The main oil cylinder (4) is connected to a water tank (8), and the water tank (8) is connected to a delivery cylinder (5).

3. The large flow filling industrial pump control system according to claim 1, characterized in that: The large-flow filling industrial pump control system also includes a cooling system, the cooling system includes an air cooler, the air cooler is connected to the return oil circuit of the main oil circuit control valve (3), and the return oil circuit of the main oil circuit control valve (3) is also connected to a filter.

4. The large flow filling industrial pump control system according to claim 1, characterized in that: The power system comprises a plurality of groups of motor oil pumps (2), wherein the plurality of motor oil pumps (2) are arranged in parallel and are respectively connected to a main oil circuit control valve (3).

5. The large flow filling industrial pump control system according to claim 1, characterized in that: A double mixer (9) is provided in the hopper (7), and the mixing device is connected to the PLC.

6. The large flow filling industrial pump control system according to claim 1, characterized in that: The distribution valve adopts an S-type pipe valve.

7. The large flow filling industrial pump control system according to claim 1, characterized in that: The main oil circuit control valve (3) comprises an electro-hydraulic reversing valve, a distribution hydraulic reversing valve and a main overflow valve.

8. The large flow filling industrial pump control system according to claim 1, characterized in that: The main oil circuit control valve (3) is provided with a manual emergency operating device.

9. The large flow filling industrial pump control system according to claim 1, characterized in that: The PLC is connected to the host computer via Ethernet.

10. A method for controlling a large flow filling industrial pump based on the large flow filling industrial pump control system according to claim 1, characterized in that: The method comprises the following steps: (1) Start the filling pump and enter the preset value in the control system; (2) The system self-checks whether the liquid level and temperature of the oil tank (1) and the material level in the hopper (7) are consistent with the preset values. If a fault occurs, the power system is shut down; (3) Start the pumping system and open the main oil circuit control valve, swing valve (6), oil cylinder, and dual mixer (9) in sequence; (4) Check whether the pressure value in the delivery pipeline is consistent with the preset value. If a fault occurs, shut down the power system; (5) The filling industrial pump operates normally.

Images