CN107826771A - New type mining powdery or granular material air-transport system - Google Patents

Abstract

A kind of new type mining powdery or granular material air-transport system, by compressed air source, material sending cans, discharging dedusting cabin and screw feeding machine composition, screw feeding machine is mounted in discharging dedusting cabin discharge outlet, for conveying material into the hopper of materials equipment, conveying system is provided between material sending cans and discharging dedusting cabin, conveying system includes conveying pipeline, auxiliary tube and some tonifying Qi pipelines being equally spaced along conveying pipeline length direction, one end of tonifying Qi pipeline connects with conveying pipeline, the other end connects with auxiliary tube, the inner chamber of material sending cans and auxiliary tube connect with compressed air source, conveying pipeline one end connects with the discharging opening of material sending cans, the other end connects with the charging aperture of discharging dedusting cabin.Required material can directly be transported in the hopper of materials equipment, flexible arrangement by the use of compressed air stream as conveying power, can avoid air pollution and waste of raw materials, save manpower, reduce labor intensity, improve efficiency by the present invention in totally enclosed pipeline.

Description

New Pneumatic Conveying System for Mine Powder or Granular Materials

technical field

The invention relates to coal mine material conveying equipment, in particular to a pneumatic conveying system suitable for underground coal mines for conveying powdery or granular materials.

Background technique

A large amount of cement, sand and gravel and other powdery or granular materials are used in the construction of anchor shotcrete support, full anchor support, and coal seam grouting in coal mines, and the transportation of the above-mentioned materials in bulk or in bags is mostly carried out by mine trucks. It is transported to a place close to the work site, and then manually transported to the equipment, which has the disadvantages of high labor intensity, many people, and high cost. In addition, dust is everywhere during the entire transport process, which is very easy to pollute the environment. Sometimes, limited by site conditions, it is difficult for mine trucks to reach the vicinity of the work site, which further increases the burden on workers.

For a long time, this situation has not been effectively improved due to the constraints of the small underground space and many factors.

Contents of the invention

The technical problem to be solved by the present invention is to provide a new type of pneumatic conveying system for mine powdery or granular materials, which can be flexibly arranged and not limited by underground space and environment, and can directly transport the required materials to the hopper of the material-using equipment In order to avoid air pollution and waste of raw materials, greatly save manpower, reduce labor intensity of workers, and improve conveying efficiency.

The technical solution of the present invention is to provide a new mining powder or granular material pneumatic conveying system with the following structure, which is composed of a compressed air source, a material sending tank, a discharge dust removal bin and a screw feeder. The machine is installed at the discharge port of the unloading and dedusting bin, and is used to transport materials into the hopper of the material equipment, wherein, a material conveying system is set between the material sending tank and the unloading and dedusting bin, and the conveying system It includes a feeding pipe, an auxiliary pipe and a number of air supply pipelines arranged at equal intervals along the length direction of the feeding pipe. One end of the air supply pipeline is connected with the feeding pipe, and the other end is connected with the auxiliary pipe. The inner cavity of the material delivery tank and The auxiliary pipes are all connected with the compressed air source, one end of the feeding pipe is connected with the discharge port of the material delivery tank, and the other end is connected with the feed port of the unloading dust removal bin.

The new mine powdery or granular material pneumatic conveying system described in the present invention, wherein the material delivery tank is equipped with a pneumatic and electrical control system, the auxiliary pipe is connected with the compressed air source through the air supply control valve, and the discharge dust removal bin is equipped with The upper limit sensor and the lower limit sensor, the compressed air source, the air supply control valve, the screw feeder, the upper limit sensor and the lower limit sensor are all electrically connected with the pneumatic and electrical control system.

In the novel mine powdery or granular material pneumatic conveying system described in the present invention, a slot-type supercharger is installed at the discharge port of the material sending tank.

The new mine powdery or granular material pneumatic conveying system according to the present invention, wherein, the inner cavity lower side wall of the material sending tank is equipped with several air nozzles, and the air nozzles communicate with the compressed air source.

The new mine powdery or granular material pneumatic conveying system described in the present invention, wherein, the bottom of the inner cavity of the material delivery tank is equipped with a screw conveyor for feeding material to the discharge port.

The new mine powdery or granular material pneumatic conveying system described in the present invention, wherein, the material delivery cans are mounted on a flatbed truck, and the unloading dust removal bin and the screw feeder are mounted on a trolley.

The new mine powdery or granular material pneumatic conveying system described in the present invention, wherein, the material delivery tank adopts positive pressure pneumatic conveying of the material.

The new mine powdery or granular material pneumatic conveying system according to the present invention, wherein, the two ends of the conveying pipe communicate with the discharge port of the material delivery tank and the feed port of the discharge dust removal bin respectively through flexible hoses.

In the novel mine powder or granular material pneumatic conveying system described in the present invention, quick-connect joints are installed at the joints at both ends of the above-mentioned pipelines.

In the novel mine powdery or granular material pneumatic conveying system described in the present invention, a gate valve is installed at the discharge port of the discharge and dust removal bin.

After adopting the above structure, compared with the prior art, the new mining powdery or granular material pneumatic conveying system of the present invention has the following advantages: the powdery or granular material that needs to be transported underground is loaded into the material delivery tank in advance, and then opened Compressed air source, under the conveying power of the air flow, the powdery or granular material enters the discharge dust bin through the conveying pipe, and then the screw feeder moves to convey the powdery or granular material into the hopper of the material equipment. Since the powdery or granular materials are transported in a fully enclosed space, they are not affected by underground ventilation and humid environment along the line, and there is no scattering and dust in the whole process, thereby avoiding environmental pollution and waste of raw materials, and achieving clean transportation. At the same time, it also greatly saves manpower and reduces the labor intensity of workers. Compared with traditional conveying methods, the pneumatic conveying system of the present invention has higher conveying efficiency, simpler overall structure, flexible layout, free from underground space and environment constraints, convenient maintenance and management, easy automation, and good economy. The invention can realize long-distance and stable transportation of materials. The feeding pipe adopts a double-pipe accompanying blowing method, and the air supply pipelines arranged at equal intervals along the line are used for intermittent air replenishment. Intermittent air supply divides the long material plug in the delivery pipe into several small sections to ensure high concentration of materials, non-stratification of mixed materials, and smooth delivery at low speed, preventing the phenomenon of sudden eruption of powder at the end.

Description of drawings

Fig. 1 is the structural representation of the left half of the novel mining powdery or granular material pneumatic conveying system of the present invention;

Fig. 2 is the structural representation of the right half of the novel mining powdery or granular material pneumatic conveying system of the present invention;

Fig. 3 is a partial cross-sectional enlarged structural schematic diagram when the material plug in the material delivery pipe is divided into several small sections by means of intermittent air supply.

Detailed ways

The following is a further detailed description of the new mining powder or granular material pneumatic conveying system of the present invention in conjunction with the accompanying drawings and specific embodiments:

As shown in Fig. 1 and Fig. 2, in this specific embodiment, the pneumatic conveying system of the novel mining powdery or granular material of the present invention is composed of a compressed air source, a material delivery tank 10, an unloading dust removal bin 12 and a screw feeder Composed of 13, the screw feeder 13 is installed at the outlet of the discharge and dust removal bin 12, and is used to transport materials to the hopper of the material equipment. The material equipment shown in FIG. 2 is a jet machine 14. A conveying system 11 is arranged between the material sending tank 10 and the discharge and dedusting bin 12, and the conveying system 11 includes a conveying pipe 110, an auxiliary pipe 114 and a number of air supply pipelines 112 arranged at equal intervals along the length direction of the conveying pipe 110 , the feeding pipe 110 is arranged in parallel with the auxiliary pipe 114 and is connected together by a pipe bracket 115 . The distance between adjacent air supply pipelines 112 can be determined according to the characteristics of the materials to be sent and the conveying distance, and the calculation formula is common knowledge. A precision filter and a one-way valve 111 are installed in the inner cavity of the air supply pipeline 112 , and the one-way valve 111 is located at the air outlet to prevent the material in the feeding pipe 110 from entering the air supply pipeline 112 . By controlling the intermittent air supply of several air supply pipelines 112, the long material plug in the feed pipe 110 can be cut into several small sections, as shown in Fig. 3, forming an alternate arrangement of material plug sections 15 and compressed air sections 16, thereby ensuring This ensures that the material is transported forward in the delivery pipe 110 in a high-concentration, low-speed, stable and reliable manner. The feeding pipe 110 is the main pipeline, and the auxiliary pipe 114 is an auxiliary pipe for supplementing air. Several feeding pipes 110 are connected by flanges, which are reliable in sealing, easy to disassemble and assemble, and are convenient for the extension and transfer of the pipeline.

The material delivery tank 10 has a horizontal structure and is a sealed pressure vessel with two feed ports on the top and a pneumatic valve 101 for feeding and sealing, and a discharge port at the bottom. Both the inner cavity of the material sending tank 10 and the auxiliary pipe 114 are connected with the compressed air source, and positive pressure is used to transport the material. The outlet of the material delivery tank 10 is equipped with a gap-type supercharger, which can drive the material to advance faster, and can also re-mix the material with compressed air, so that the material can reach a higher concentration ratio and be transported forward smoothly. One end of the feeding pipe 110 communicates with the outlet of the material delivery tank 10 through the rubber hose 20, and the other end also communicates with the inlet of the discharge and dust removal bin 12 through the rubber hose, which is convenient for quick adjustment of the mutual position and connection. .

When the volume of the material delivery tank 10 is relatively large, a screw conveyor 104 for feeding material to the discharge port can be installed at the bottom of the inner cavity, which can clean the material in the tank and also have a certain mixing effect. In this embodiment, the screw conveyor 104 uses compressed air as a power source, and of course, electricity can also be used as a power source.

A number of air nozzles 105 are installed on both side walls of the lower inner cavity of the material delivery tank 10 to prevent the material from sticking to the wall, and the air nozzles 105 communicate with the compressed air source.

In order to facilitate the rapid movement of the present invention with the underground vehicle transportation system, improve mobility, and meet the needs of loading and changing the work site according to demand, the material delivery tank 10 is installed on the flatbed truck 103, and the unloading dust removal bin 12 and the screw feeder 13 is installed on the handcart 123, and the handcart 123 has three wheels, and it is manually promoted when moving, and supports with four lifting screw rods when fixing.

A pneumatic and electrical control system 102 is installed on the material sending tank 10 , and the auxiliary pipe 114 communicates with the compressed air source through the air supply control valve 113 . The unloading and dedusting bin 12 is used to separate the input material from the gas, remove dust and store the material. The upper part is a dust collector 120, and the lower part is a storage bin 125. A gate valve 124 is installed at the discharge port at the bottom of the storage bin 125. , used to adjust the delivery rate of the screw feeder 13 to match the material consumption of the material equipment. The upper limit sensor 121 and the lower limit sensor 122 are specifically installed on the storage bin 125, the compressed air source, the air supply control valve 113, the screw feeder 13, the upper limit sensor 121 and the lower limit sensor 122 are all connected with the pneumatic and electrical control system 102 electrical connections. When the material exceeds the height of the upper limit sensor 121, the pneumatic and electrical control system 102 automatically stops the pneumatic conveying of the material; when the material reaches the lower limit sensor 122, the pneumatic and electrical control system 102 starts the pneumatic delivery of the material to the hopper again, thereby realizing automation control. The air supply volume and intermittent air supply time of the air supply control valve 113 are also controlled by the pneumatic and electrical control system 102. In addition, the pneumatic and electrical control system 102 can also adjust the material delivery pressure of the conveying system according to the material characteristics to ensure the lowest air consumption , greatly saving operating costs.

The joints at both ends of the above-mentioned pipelines are equipped with quick-connect joints, which are convenient for quick disassembly and assembly, and save time.

The method of use of the present invention is as follows: first, put single or mixed finished materials into the horizontal material delivery tank 10, then connect the material delivery pipe 110 with the outlet of the material delivery tank 10 through a quick joint, and then turn on the compressed air source , under the transmission power of the air flow, the material is transported to the discharge and dust removal bin 12 at a long distance for material and gas separation and storage, and the material in the storage bin 125 is directly sent to the jet machine 14 through the screw feeder 13 in the hopper for construction use.

The invention breaks the long-standing traditional conveying mode of powdery or granular materials underground in coal mines, and uses air flow as the conveying power to carry powdery or granular solid materials in a fully enclosed pipeline. It can be used not only for a single material, but also for conveying mixed materials with different densities. The transportation pipeline can be flexibly arranged, and is basically not limited by the underground space and environment, and can directly transport the required materials to the material equipment. The present invention adopts a double-pipe accompanying blowing method (consisting of a feeding pipe and an auxiliary pipe), and uses an air supply pipeline along the line for intermittent air supply, and then realizes plug flow pulse dense-phase transportation in the feeding pipe, and the mixed material is not stratified, The transportation is stable, and it can realize long-distance transportation of more than several hundred meters. When transporting along the pipeline, it is not affected by underground ventilation and humid environment, without spilling and dust, avoiding environmental pollution and waste of raw materials, and realizes clean transportation. Compared with traditional transportation methods, it has higher transportation efficiency and greatly saves manpower. and labor intensity of workers. During the conveying process, the present invention has less material wear on the pipeline, and has a longer service life; the structure is relatively simple, the movement and maintenance management are very convenient, the automation is easy to realize, and the utility model has good economy.

In this specific embodiment, the compressed air source, the material sending tank 10, the screw conveyor 104, the pneumatic and electrical control system 102, the precision filter, the unloading dust removal bin 12, the screw feeder 13, and the upper limit sensor 121, the lower limit sensor 122, the valve, the trolley 123 and the flatbed cart 103 are all commercially available products, so their specific structures will not be repeated here.

The above-mentioned embodiments are only descriptions of preferred implementations of the present invention, and are not intended to limit the scope of the present invention. Variations and improvements should fall within the protection scope of the present invention.

Claims (10)

1. a kind of new type mining powdery or granular material air-transport system, by compressed air source, material sending cans (10), discharging Dedusting cabin (12) and screw feeding machine (13) composition, the screw feeding machine (13) are mounted in the discharging opening of discharging dedusting cabin (12) Place, for conveying material into the hopper of materials equipment, it is characterised in that：The material sending cans (10) and discharging dedusting cabin (12) be provided with conveying system (11) between, the conveying system (11) include conveying pipeline (110), auxiliary tube (114) and if The dry tonifying Qi pipeline (112) being equally spaced along conveying pipeline (110) length direction, one end of the tonifying Qi pipeline (112) with it is defeated Expects pipe (110) connects, and the other end connects with auxiliary tube (114), and the inner chamber of the material sending cans (10) and auxiliary tube (114) are equal Connected with compressed air source, described conveying pipeline (110) one end connects with the discharging opening of material sending cans (10), the other end and discharging The charging aperture connection of dedusting cabin (12).

2. new type mining powdery according to claim 1 or granular material air-transport system, it is characterised in that：The thing Pneumatic and electric control system (102), the auxiliary tube (114) are installed in material sending cans (10) and pass through gas supply control valve (113) connected with compressed air source, upper limit level sensor (121) and lower limit level sensor are housed on the discharging dedusting cabin (12) (122), the compressed air source, gas supply control valve (113), screw feeding machine (13), upper limit level sensor (121) and lower limit Sensor (122) electrically connects with pneumatic and electric control system (102).

3. new type mining powdery according to claim 2 or granular material air-transport system, it is characterised in that：The thing The discharge outlet of material sending cans (10) is equipped with clearance type booster.

4. new type mining powdery according to claim 3 or granular material air-transport system, it is characterised in that：The thing Some air nozzles (105), the air nozzle (105) and compressed air are installed on the inner chamber bottom two side of material sending cans (10) Source connects.

5. new type mining powdery according to claim 4 or granular material air-transport system, it is characterised in that：The thing Expect that the intracavity bottom of sending cans (10) is equipped with the conveying worm being used for discharging opening feeding.

6. new type mining powdery according to any one of claims 1 to 5 or granular material air-transport system, its feature exist In：On flat car (103), the discharging dedusting cabin (12) and screw feeding machine (13) are mounted in the material sending cans (10) On trolley (123).

7. new type mining powdery according to claim 6 or granular material air-transport system, it is characterised in that：The thing Material sending cans (10) use positive pneumatic transport material.

8. new type mining powdery according to claim 7 or granular material air-transport system, it is characterised in that：It is described defeated The both ends of expects pipe (110) pass through the charging of flexible pipe (20) and the discharging opening and discharging dedusting cabin (12) of material sending cans (10) respectively Mouth connection.

9. new type mining powdery according to claim 8 or granular material air-transport system, it is characterised in that：It is above-mentioned each The interface of pipe ends is mounted on quick union.

10. new type mining powdery according to claim 9 or granular material air-transport system, it is characterised in that：It is described The discharge outlet of discharging dedusting cabin (12) is equipped with gate valve (124).