CN202810927U - Fly ash cementation automatic filling system - Google Patents

Abstract

The utility model relates to a fly ash cementing automatic filling system, which is composed of a fly ash mixing tank, a glue solid material tank, a slurry mixing tank, a filling slurry delivery pipeline and an electric automatic control part, and the bottom of the fly ash mixing tank is connected to a prefabricated The slurry output pipeline; the glue solid material discharge port is set at the bottom of the glue solid material tank; the slurry mixing tank is set under the first two; the slurry mixing tank discharge port is connected to the filling slurry delivery pipeline; the pre-pulp of the fly ash mixing tank The output pipeline is connected to the slurry mixing tank through the control valve; a screw conveyor is installed between the discharge port of the glue solid material tank and the feeding port of the slurry mixing tank; the electrical automatic control part is composed of an automatic control system with PLC as the core, a pneumatic control valve, A flow automatic adjustment device composed of a liquid level gauge and a flow meter. The utility model has the advantages of simple and compact layout, small space occupation, low construction cost, self-flowing without pumping for filling slurry, high degree of automatic control, convenient operation, stable and reliable system operation, and 90% reduction in downtime rate.

Description

Fly ash cemented automatic filling system

technical field

The utility model belongs to mine filling systems (including coal mines and non-coal mines), in particular to an automatic filling system for fly ash cementation. the

Background technique

Mine filling has a history of hundreds of years, but the development of mine filling system as a technology has a history of less than 60 years in foreign countries, and nearly 40 years in China, and the development is relatively fast and mature mainly in metal mines. Compared with metal mines, the research and development of coal mine filling technology is much slower; however, with the increasingly prominent environmental problems of coal mining, the country's increasing emphasis on environmental and land issues, and the sharp rise in coal prices, coal filling mining has become more and more popular in recent years. to be highly valued. Since the beginning of the 20th century, some experts have put forward the idea of filling coal mining, and carried out a lot of experimental research work. Taiping Coal Mine has invested heavily in the country and adopted filling technology earlier. Since 2003, the mine has invested more than 60 million yuan. Using German slurry preparation and transportation technology, river sand, power plant fly ash, special cementing material and water are used to prepare a paste slurry, which is pumped to the underground filling mine. empty area. The Suncun Coal Mine of Xinwen Mining Bureau uses coal gangue as the main material, and adds fly ash and early strength agent to make a paste-like slurry for filling. Hebei Xingtai Mine has also carried out experimental research on paste filling. the

In the prior art, the domestic mine filling system mainly includes a filling main material transmission system, an auxiliary material storage system, a stirring system, a pumping pressurization system, a pipeline delivery system, and a water supply system composed of multiple water pumps. Its disadvantages are:

①The filling process system is huge and complex, taking up a lot of space; ②It is difficult to install, complicated to operate, and high in construction costs; ③The filling slurry needs to be pumped and cannot achieve self-flow. ④ The degree of automation control is low, and there are many operators. the

Taking the scale of filling volume of 100m ³ /h as an example, the paste filling project of Daizhuang Coal Mine in Shandong covers an area of about 6000m ² , with more than 260 filling equipment and an investment of 110 million yuan. The filling slurry needs to be pumped and cannot achieve self-flowing. The degree of automation control is low, and about 30 operators are used.

Utility model content

The purpose of the invention of the utility model is to solve the defects of the prior art and provide an automatic filling system for fly ash cementation. the

The technical scheme that the utility model adopts for solving the problems of the technologies described above is:

A fly ash cemented automatic filling system is developed, which is mainly composed of a fly ash mixing tank, a glue solid material tank, a slurry mixing tank, a filling slurry delivery pipeline and an electrical automatic control part. Its characteristics are:

A stirring device for pre-pulping is arranged in the fly ash stirring tank, and a fly ash feed pipe and a water supply pipeline are arranged on the top cover of the tank, and the conical bottom of the tank is connected to the pre-pulping output pipeline through a control valve;

The top of the glue solid material tank is provided with a feeding pipeline and a material level gauge, and an electric vibrator is arranged at the conical surface of the tank bottom; the glue solid material discharge port is set at the bottom of the conical tank;

The slurry mixing tank is arranged under the fly ash mixing tank and the glue solid material tank; the slurry mixing tank is provided with a stirring device and a liquid level gauge, and the discharge port at the lower end of the slurry mixing tank is connected with the filling slurry delivery pipeline;

The prefabricated slurry output pipeline of the fly ash mixing tank is connected with the slurry mixing tank through the control valve; a screw conveyor is installed between the discharge port of the cement material tank and the feeding port of the slurry mixing tank;

The upper end of the filling slurry delivery pipeline is connected to the discharge port of the slurry mixing tank; the lower end of the filling slurry delivery pipeline is connected to the filling slurry delivery pipeline that flows to the underground filling face of the mine;

The electric automatic control part is composed of an automatic control system with PLC as the core, a pneumatic control valve, a flow automatic adjustment device composed of a liquid level meter and a flow meter. the

The above-mentioned fly ash cemented automatic filling system is characterized in that the water supply pipeline, material delivery pipeline and pre-pulp output pipeline of the fly ash mixing tank are provided with electromagnetic valves and flow meters. the

The above-mentioned fly ash cemented automatic filling system is characterized in that the glue-solid material discharge port of the glue-solid material tank is provided with a feeding frequency conversion screw conveyor and a metering screw conveyor connected in series. the

The above-mentioned fly ash cemented automatic filling system is characterized in that the slurry delivery pipeline at the discharge port of the slurry mixing tank is provided with a pneumatic regulating valve and an electromagnetic flowmeter. the

The above-mentioned fly ash cemented automatic filling system is characterized in that in the electrical automatic control part, the output of the module 332-5HF00 is connected to the start-up regulating valve; the input of the module 331-1KF02 is connected to the liquid level instrument; the module 331-1KF02 The input is connected to the flow meter. the

The beneficial effects of the utility model are:

The utility model is a special filling system designed according to the characteristics of filling slurry. The fly ash cemented automatic filling system is simple and compact in layout and occupies a small space. Taking the scale of filling volume of 100m3/h as an example, the paste filling project of Shandong Daizhuang Coal Mine , covering an area of about 6,000m ² , with more than 260 filling equipment and an investment of 110 million yuan. The filling slurry needs to be pumped and cannot achieve self-flow. The degree of automation control is low, and there are about 30 operators.

The utility model only needs to occupy an area of about 1500m ² , does not need to fill the main material transmission system, only 17 sets of filling equipment are needed, and the construction cost is only more than 6 million yuan. Only about 3 operators are needed, the operation is convenient, the system is stable and reliable, and the downtime rate is reduced by 90%.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the utility model;

Fig. 2 is a schematic diagram of the connection relationship between the modules of the electric automatic control part of the utility model. the

Detailed ways

As shown in Figure 1, 1 fly ash mixing tank, 2 glue solid material tank, 3 radar level gauge of glue solid material tank, 4 motor vibrator, 5 feeding frequency conversion screw conveyor, 6 metering screw conveyor, 7 slurry The radar level gauge of the stirring tank, 8 the filling and conveying pipeline of the underground filling face of the mine, 9 the slurry conveying pipeline, the pneumatic regulating valve of the 10-1 slurry conveying pipeline, and the pneumatic control valve of the 10-2 fly ash mixing tank discharging pipeline Regulating valve, 11-1 Electromagnetic flowmeter of slurry delivery pipeline, 11-2 Electromagnetic flowmeter of fly ash mixing tank discharge pipeline, 12 Slurry mixing tank, 13 Electromagnetic gate valve of fly ash mixing tank discharge port, 14 Radar level gauge for fly ash mixing tank. the

Shown in Fig. 2, the working situation brief introduction of electric automatic control part module. the

Signal module composed of switch input module SM321-1BL00, switch output module SM322-1BL00, analog input module SM331-1KF01 and analog output module S332-5HF00;

One end of the signal module is connected to the central control computer through the CPU and communication interface; the other end is connected to field electrical appliances and instruments. the

The switch value input module is SM321-1BL00, which mainly receives the operation and fault signals from the electrical part, and transmits these signals to the CPU for processing, and displays them on the computer screen. the

The switching value output module is SM322-1BL00, which is mainly used to control the switching value output of the on-site motor and on-off valve, and isolate the on-site signal through the DC24V relay to ensure the safety of the module. the

The analog input module is SM331-1KF01, which mainly receives analog signals such as on-site liquid level and flow rate, and transmits these signals to the CPU for processing, displays the values on the computer screen, and displays an out-of-range alarm. the

The analog output module S332-5HF00 is mainly used to control the frequency converter and the regulating valve. It is operated on the computer screen during manual operation, and the frequency converter and regulating valve are controlled through the CPU; when it is automatic, the parameters are set on the computer, and the CPU automatically adjusts the frequency conversion through the parameters. The regulator and regulating valve meet the process requirements. the

For the wiring schematic diagram of the module, refer to "PLC Wiring Diagram of Filling Station 20110714". When the module 321 is working, the external passive node is connected, and the green LED light at the corresponding position is on. When the module 322 is working, the output LED green light is on, and the relay coil is connected to control the connection of 220V electricity. When the module 331 is working, the analog signal 4-20mA is input into the module, and then the result is sent to the host computer for display after the module processing. When the module 332 is working, it converts the required frequency or valve opening into 4-20mA, and then outputs it to the corresponding actuator. the

Example

The raw material fly ash comes from the raw ash of the local power plant, and the cement solid material is cemented with high water to cement the commercially available goods. the

Required equipment and instruments: fly ash mixing tank Φ4000mm, glue solid material tank Ф3000mm, slurry mixing tank Ф2000mm, feeding frequency conversion screw conveyor model LGX250-00, Ф250mm, metering screw conveyor model JLGX25, electromagnetic gate valve model ZCZP-10C, DN80, radar liquid level gauge models HVV-16C, DN80, etc. are commercially available. the

The fly ash cemented automatic filling system is equipped with a PLC automatic control system to realize automatic control. the

The electric control part adopts the automatic control system with PLC as the core, and the self-programming (DCS control system) microcomputer operates all the equipment. the

The system can operate continuously in the field environment with high electronic noise, radio frequency interference and vibration without degrading the performance of the system. The system design uses various anti-noise techniques, including optical isolation, high common-mode rejection ratio, proper grounding and shielding. the

The electromagnetic interference and radio frequency interference with a working frequency of 470MHz and a power output of 5W emitted beyond 1.2m from the electronic equipment will not affect the normal operation of the system. the

The system can operate continuously in an environment with an ambient temperature of 0-40°C and a relative humidity of 10-95% (no condensation). the

Through probation, reach effect and satisfy the expected invention purpose. the

Claims (5)

1. the cementing automatic filling of flyash system, mainly by the flyash agitator tank, the solid batch can of glue, the slurry agitation tank, filling slurries conveyance conduit and electric automatic control partly consist of, and it is characterized in that:

The mixing plant of pre-slurrying is set in the described flyash agitator tank, flyash feed pipe and supply channel are set on its top ends of cans, connect pre-slurrying output pipe through control valve at the bottom of its tapered shaped can;

The solid batch can top of described glue arranges conveying pipeline and level-sensing device, and the taper surface place arranges electric vibrator at the bottom of the tank; Glue is set at the bottom of the tapered shaped can admittedly expects drain hole;

Described slurry agitation tank is arranged on flyash agitator tank and the solid batch can of glue below; The slurry agitation tank arranges mixing plant and tank gage, and slurry agitation tank lower end drain hole is connected with filling slurries conveyance conduit;

The pre-slurrying output pipe of flyash agitator tank is connected with the slurry agitation tank through control valve; Between the solid batch can drain hole of glue and slurry agitation tank charging aperture conveying worm is set;

Described filling slurries conveyance conduit upper end is connected with slurry agitation tank drain hole; Filling slurries conveyance conduit lower end is connected with the filling grout pipe line that flows automatically to mine retrofilling work plane;

Described electric automatic control part is by the automatic control system take PLC as core, pneumatic control valve, the automatic flow rate adjusting device that tank gage and flow meter consist of.

2. the cementing automatic filling of flyash according to claim 1 system is characterized in that supply channel, conveying pipeline and the pre-slurrying output pipe of described flyash agitator tank is provided with electromagnetic valve and flow meter.

3. the cementing automatic filling of flyash according to claim 1 system is characterized in that the glue of the solid batch can of described glue expects that admittedly drain hole is provided with feed frequency conversion conveying worm and the metering screw conveyer of series connection.

4. the cementing automatic filling of flyash according to claim 1 system is characterized in that the slurries conveyance conduit of described slurry agitation tank drain hole end is provided with pneumatic control valve and electromagnetic flowmeter.

5. the cementing automatic filling of flyash according to claim 1 system is characterized in that in the described electric automatic control part, the output of module 332-5HF00 is connected with the startup control valve; The input of module 331-1KF02 is connected with liquid level instrument; The input of module 331-1KF02 is connected with flow meter.

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