CN101514632B - Rotary air flow type concrete dry-conveying and wet-concreting machine - Google Patents

Abstract

The invention discloses a rotary air flow type concrete dry conveying wet spraying machine, which is composed of a screw feeder, a spiral air flow generator, an air material mixer, a conveying pipeline and a decompression atomizing wet condenser; wherein the spiral air flow generator is used for In order to convert the compressed air in the mine pipeline into the rotating air flow as the power source, the concrete is fully mixed with the air material mixer to form a uniform mixture of gas and solid two phases; the decompression atomizing humidifier is used to make the concrete dry powder in the pipeline Add water to the end and atomize to form a viscous mixture. The invention provides mechanized equipment for filling concrete gob-side entry.

Description

Rotary Air Flow Concrete Dry Conveyor Wet Sprayer

technical field

The invention relates to the technical field of underground concrete forming and conveying in coal mines.

Background technique

In the underground mining of coal mines, it is required to keep a 10-meter protective coal pillar between the two working faces, and then 100,000 tons of protective coal pillars must be left in the 1 million-ton mining face. These coals cannot be mined and cause a serious waste of coal resources. At present, some mines use gobside entry filling concrete to replace the coal pillars, but manual concrete mixing, manual transportation, and use of vibrating rods to stir wet materials are required for concrete filling. The labor intensity of the workers is high, the concrete solidification and forming time is long, the strength is low, and the roof support effect is poor. Therefore, there is a great need for a mechanized concrete gob-side entry filling equipment

Contents of the invention

In order to solve the above-mentioned problems, the present invention provides a rotary air-flow type concrete dry conveying and wet spraying machine.

The technical solution is: it consists of a screw feeder, a spiral air flow generator, an air material mixer, a conveying pipeline and a decompression atomizing humidifier, wherein:

The structure of the spiral wind flow generator is to close one end of a pipe shell, connect 2-4 branch pipes obliquely evenly around the pipe wall, and connect with the underground high-pressure air pipe through the branch pipes; the other part of the pipe shell One end is used as the air outlet; the arrangement of the fork pipe should ensure that the axial direction of the outlet is at an angle of 30-40° to the axial direction of the pipe, and the positive pressure air will form a rotating air flow in the pipe after being connected with the mine high-pressure air pipe;

The structure of the air material mixer is: use one end of a pipe shell as the air inlet, and connect it with the air outlet of the spiral air flow generator; the top surface of the pipe shell pipe wall is provided with a feed port, and the feed port is connected to the screw feeder. The outlet is sealed and connected; the other end of the pipe shell is set as a trumpet-shaped outlet, through which the conveying pipeline is connected, and the outlet of the conveying pipeline is connected with a decompression atomizing humidifier;

The structure of the decompression atomizing humidifier is as follows: it includes a pipe shell larger than the diameter of the conveying pipeline, and one end of the pipe shell is provided with an interface connected to the conveying pipeline, and is connected to the conveying pipeline through the interface; the pipe shell The other end of the pump is opened as a discharge port, and several high-pressure atomizing nozzles are arranged on the pipe wall of the pipe shell, and each atomizing nozzle is connected to the downhole pressure water pipe through a water valve.

The working principle of the present invention is: firstly mix the stones, sand, cement and dehydrating agent according to a certain ratio, use the screw feeder as the feeding equipment, and use the spiral air flow generator to convert the compressed air of the mine pipeline into the rotating air flow As the power source, the concrete is fully mixed with an air-mixer to form a uniform mixture of gas and solid phases. Wear-resistant steel pipes are used as the delivery pipeline, and a decompression atomization humidifier is installed at the outlet of the delivery pipeline to make the The uniform dry concrete material is decelerated and depressurized at the outlet, atomized and formed, and filled into the preset box slab at the position of the gob-side entry retention. The concrete is dehydrated and solidified in a short time, and reaches a certain strength, which plays a role in supporting the goaf area, instead of protecting coal pillars and increasing exploitable reserves.

Advantage of the present invention is:

1. Concrete particles rub and collide with each other under the layer-by-layer extrusion of the screw feeder, and are stirred in the screw propulsion to form a uniform mixture without manual mixing or vibrating rods, which reduces the labor intensity of workers. At the same time, the concrete particles are screwed and pushed forward in the screw feeder to form a closed body, which completely eliminates the phenomenon of pipeline backwind.

2. The rotating air flow provided by the spiral air flow generator is used as a power source to make the mixed concrete particles spiral forward in the pipeline to the position of the lane design on the working surface, which prevents the pipeline blockage caused by the accumulation and sinking of concrete.

3. The rotating air flow provided by the spiral air flow generator is fully mixed with the concrete particles in the granular air material mixer to form a uniform gas-solid two-phase mixture, which enters the conveying pipeline in a floating state, and is not easy to block the pipeline.

4. The transmission pipeline is made of wear-resistant steel pipe, and the inner wall of the pipeline has good self-lubrication, which can effectively reduce the resistance of the inner wall of the pipeline and realize long-distance transportation; it is also wear-resistant and can be used for a long time.

5. The decompression atomizing humidifier installed at the end of the pipeline makes the dry concrete powder atomized by adding water at the end of the pipeline to form a viscous mixture, which realizes the transportation of concrete dry material and the outlet humidification forming filling, with strong compactness , high strength, and the formed solidification has a good supporting effect.

Description of drawings

The technical scheme of the utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a schematic diagram of the structural layout of the utility model;

Fig. 2 is the front view of the spiral wind flow generator;

Fig. 3 is the A-A sectional view of Fig. 1;

Fig. 4 is the front view of the decompression atomizing humidifier;

Fig. 5 is a front view of an embodiment of the wind material mixer.

In the attached drawings: 1-screw feeder, 2-high-pressure air pipe, 3-spiral wind flow generator, 4-air material mixer, 5-transport pipeline, 6-decompression atomizing humidifier, 7, 10, 14-pipe shell, 8-fork pipe, 9-air outlet, 11-air inlet, 12-inlet, 13-horn-shaped outlet, 15-high-pressure atomizing nozzle, 16-interface, 17-outlet Feed port, 18-water valve, 19-pressure water pipe.

Detailed ways

As shown in Figure 1, the utility model is composed of a screw feeder 1, a spiral air flow generator 3, an air material mixer 4, a delivery pipeline 5 and a decompression atomizing humidifier 6; wherein:

The structure of the spiral wind flow generator is shown in Figure 2. It closes one end of a pipe shell 7, and connects three fork pipes 8 uniformly and obliquely around the pipe wall, and connects the fork pipe 8 with the underground high-pressure air pipe. 2 connection; the other end of the pipe shell 7 is used as the air outlet 9; the arrangement of the fork pipe 8 is shown in Figure 3, and it can be seen from Figure 3 that the axial direction of the outlet of the fork pipe 8 and the axial direction of the pipe are α =30-40 ° angle, and tangent to the circumference of the pipe housing 7 sections, so that the positive pressure wind will form a swirling air flow in the pipeline after the fork pipe 8 is connected with the mine high-pressure air pipe 2.

The structure of wind material mixer 4 is as shown in Figure 5: it is to use one end of a section of pipeline housing 10 as air inlet 11, and is connected with the air outlet 9 of spiral wind generator 3; The feed port 12 is sealed and connected with the discharge port of the screw feeder 1 through the feed port 12; the other end of the pipe shell 10 is set as a trumpet-shaped discharge port 13, and the conveying pipeline 5 is connected through the trumpet-shaped discharge port 13 , the outlet of the delivery pipeline 5 is connected to the decompression atomizing humidifier 6;

The structure of the decompression atomizing humidifier 6 is shown in Figure 4: it includes a pipe housing 14 larger than the diameter of the delivery pipeline, and one end of the pipeline housing 14 is provided with an interface 16 connected to the delivery pipeline 5, and through the interface 16 is connected with the conveying pipeline 5; the other end of the pipeline shell 14 is opened as a discharge port 17, and several high-pressure atomizing nozzles 15 are arranged on the wall of the pipeline shell 14, and each atomizing nozzle 15 is connected through a water valve 18 On the downhole pressure water pipe 19.

Claims (1)

1. a rotary air flow type concrete dry-conveying and wet-concreting machine is characterized in that, it is made up of feed screw, spiral air flow generator, wind feed mixer, transfer pipeline and vacuum atomization condenser, wherein:

The structure of spiral air flow generator is with the end sealing of a segment pipe housing, at even oblique connection 2-4 breeches pipe of tube wall week side, to be connected with the down-hole high pressure airduct by a breeches pipe; The other end of pipeline shell is as air outlet; What the arrangement of breeches pipe should guarantee the exit axially is 30-40 ° angle with pipeline axial, and is connected with the mine high-pressure air hose afterwards malleation wind in pipeline, form rotate distinguished and admirable;

The structure of wind feed mixer is: an end of a segment pipe housing as air intake, and is connected with the air outlet of spiral air flow generator; Pipeline shell tube wall end face is provided with charging aperture, is tightly connected by charging aperture and feed screw discharging opening; The other end of pipeline shell is set to tubaeform discharging opening, connects transfer pipeline by tubaeform discharging opening, and the transfer pipeline outlet is gone up and connected vacuum atomization condenser;

The structure of vacuum atomization condenser is: it comprises one section pipeline shell greater than feed line diameters, the interface that an end setting of pipeline shell is connected with transfer pipeline, and be connected with transfer pipeline by interface; The other end of pipeline shell is uncovered to be discharging opening, and a plurality of atomizers are set on the pipeline shell tube wall, and each atomizer is connected on the down-hole pressure water pipe through penstock.

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