CN203835390U - Foam-spray dust removal system in heading machine - Google Patents

Abstract

The utility model discloses an internal spray foam dust removal system for a roadheader, which comprises a foam preparation system (1), a foam distribution system (2), a foam terminal injection system (3), a pressurized water pipeline (9) and a compressed air pipeline ( 10), the foam preparation system is fixedly installed on the machine cover of the roadheader through the permanent magnetic jack (4), and is connected to the foam distribution system through the foam delivery pipe; the foam delivery pipe is installed on the underside of the roadheader guard; the foam distribution The system is built into the cutting arm of the roadheader; both the pressurized water line and the pressurized air line are connected to the foam preparation system. The utility model makes use of the stackability of the foam to continuously cover and accumulate the injected foam on the pick, so that it can work in the foam package, moisten the coal and rock mass and suppress the generation of dust, reduce the generation of dust from the source, and has the function of dust removal. The unique advantages of good effect and low water consumption can dilute the gas, cool the pick and eliminate sparks, reduce the frequency of pick replacement, and prevent the occurrence of gas and coal dust explosions.

Description

Spray foam dust removal system inside roadheader

technical field

The utility model relates to a foam generating device, in particular to a foam spraying dust removal system inside a roadheader, which belongs to the field of foam generating devices.

Background technique

With the development of mechanized tunneling technology in coal mine underground tunnels, the power of the continuously updated roadheaders is getting higher and higher, the driving strength is getting bigger and bigger, and the dust production is gradually increasing. Rotation, the pick temperature is high, it is easy to rub sparks, induce coal dust and gas explosion, which not only restricts the safe production of coal mines, but also greatly threatens the life and health of workers.

At present, the dust removal methods used in the excavation working face mainly include measures such as ventilation and dust removal, spray dust removal or chemical dust suppression. However, these measures are limited by the defects of the technology itself or the actual situation of the operation point. Not strong defect. Among them, spray dust removal has become the most important dust removal method in the excavation process due to its flexible use and easy operation. damage, and the disadvantages of difficulty in controlling the atomization effect; and the spraying inside the roadheader avoids these shortcomings to a large extent, by building the pipeline inside the cutting arm of the roadheader, and placing the nozzle directly The front end is sprayed at the dust source, which has the characteristics of good dust removal effect and low water consumption. At the same time, it can dilute the gas, cool the pick and eliminate sparks. However, it should meet the requirements of atomization. The diameter of the nozzle is usually 1.5-2mm, and the nozzle is easy to block. And because the required high water pressure of atomization makes the water supply pipeline that is arranged on the inside of the cutting arm extremely unstable. The traditional chemical dust suppression structure is simple, stable and reliable, but it is far away from the dust source, the dust has spread, the dust suppression effect is poor, and the foam utilization rate is low.

Contents of the invention

Aiming at the above-mentioned problems in the prior art, the utility model provides a dust removal system for spraying foam inside the roadheader, which has simple preparation and distribution of foam, is not easy to block the nozzle, has high dust removal efficiency, and is easy to install and operate.

In order to achieve the above purpose, the internal spray foam dust removal system of the roadheader includes a foam preparation system, a foam distribution system, a foam terminal injection system, a pressurized water pipeline and a pressurized air pipeline, and the foam preparation system is fixed and installed by a permanent magnetic jack On the machine cover of the roadheader, and connected with the foam distribution system through the foam delivery pipe; the foam delivery pipe is installed on the underside of the roadheader guard; The terminal injection system is arranged in the middle of the cutting head of the roadheader, and the pressure water pipeline and the pressure air pipeline are both connected to the foam preparation system.

The foam preparation system includes a water joint, an air joint, a proportional mixer, a foamer and a pressure relief valve, the water joint is horizontally connected to the proportional mixer through a water pipeline, and a filter 1 and a regulating valve 1 are arranged on the water pipeline; The liquid inlet end of the proportional mixer is connected with a foaming agent suction pipeline, and a filter III and a micro-control valve are arranged on the foaming agent suction pipeline; Connection, the air pipeline is arranged with a filter II and a regulating valve II; the foamer is vertically connected with the outlet end of the proportional mixer; the pressure relief valve is installed at the end of the foam output pipeline at the outlet of the foamer; The pressure water pipeline is connected to the water joint; the pressure air pipeline is connected to the air joint.

The foam distribution system includes a water inlet sleeve and a central water guide pipe built in the cutting spindle of the roadheader. The water inlet sleeve is arranged between the cutting spindle of the roadheader and the cutting arm of the roadheader. There is a water guide hole at the end that communicates with the central water guide pipe. There are through holes communicated with the central water guide pipe on the cutting spindle of the roadheader, the water inlet sleeve and the cutting arm of the roadheader. Pipelines are installed at the through holes. The foam inlet at one end of the road, the central water guide pipe, the water guide hole and the water chamber are connected to each other; a water leakage plug is provided under the cutting arm of the roadheader and near the water inlet sleeve.

The foam terminal injection system includes a nozzle base and a special nozzle for internal spray foam installed on the nozzle base. The nozzle base is installed in the middle of the cutting head of the roadheader and communicates with the water cavity; The special nozzles for internal spray foam are connected by thread or by quick connection.

The special nozzle for internal foam spraying is a central through-hole structure with a pore diameter of 6-8mm, and filter screens are provided on both sides of the hole to prevent clogging.

Compared with the prior art, the utility model optimizes the advantages of large coverage area, strong wettability, good adhesion and large injection volume of the foam in the chemical dust suppression by spraying the foam inside the roadheader, and overcomes the need for internal spraying. Disadvantages of small caliber of atomizing nozzle, easily damaged nozzle, and unstable high-pressure distribution system. Spray the foam from the special foam nozzle on the cutting head to the dust source, make use of the accumulation of the foam, so that the injected foam continues to accumulate and cover the pick, so that it can work in the foam package and wet the coal Rock mass and suppress dust generation, reduce dust generation from the source, especially for respirable dust, the dust removal effect is better, and the water consumption is small, which can greatly reduce the water consumption of the operation point, reduce the subsidence of the roadheader, and the poor working conditions And so on a series of questions. At the same time, this technology can effectively dilute the gas, cool the pick and eliminate sparks, which not only reduces the frequency of pick replacement, but also prevents the occurrence of gas and coal dust explosions. In addition, the foam preparation system is fixed on the machine cover of the roadheader through a permanent magnetic jack, which is stable and easy to move, which greatly facilitates the installation and maintenance of the equipment.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of foam preparation system in the utility model;

Fig. 3 is the structural representation of foam distribution system in the utility model;

Fig. 4 is the main view of the special nozzle for spraying foam in the quick connection form in the utility model;

Fig. 5 is the top view of the special nozzle for spraying foam in the quick connection form in the utility model;

Fig. 6 is the main diagram of the special nozzle for spraying foam inside the threaded connection type in the utility model;

Fig. 7 is a top view of the threaded connection type special nozzle for internal spraying foam in the utility model.

In the figure: 1. Foam preparation system, 2. Foam distribution system, 3. Foam terminal injection system, 4. Permanent magnetic lifter, 5. Foam delivery pipe, 6. Roadheader guard plate, 7. Roadheader cutting arm , 8, roadheader cutting head, 9, pressure water pipeline, 10, pressure air pipeline, 11, water joint, 12, wind joint, 13-1, filter I, 13-2, filter II, 13- 3. Filter III, 14-1, Regulating valve I, 14-2, Regulating valve II, 15, Micro control valve, 16, Proportional mixer, 17, Foamer, 18, Pressure relief valve, 19, Roadheader Cutting spindle, 20, foam inlet, 21, central water guide pipe, 22, water guide hole, 23, water cavity, 24, water inlet sleeve, 25, nozzle base, 26, leaking plug, 27, special nozzle for internal spray foam , 28, filter screen.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figure 1, the utility model is an internal spray foam dust removal system for roadheaders, including a foam preparation system 1, a foam distribution system 2, a foam terminal injection system 3, a pressurized water pipeline 9 and a compressed air pipeline 10. The foam preparation system 1 is fixedly installed on the machine cover of the roadheader through the permanent magnetic jack 4, and is connected with the foam distribution system 2 through the foam delivery pipe 5; the foam delivery pipe 5 is installed on the underside of the roadheader guard plate 6; The foam distribution system 2 is built in the cutting arm 7 of the roadheader; the foam terminal injection system 3 is arranged in the middle of the cutting head 8 of the roadheader, and the pressure water pipeline 9 and the pressure air pipeline 10 are connected with the foam preparation system 1 connection.

As shown in Figure 2, the foam preparation system 1 includes a water connection 11, an air connection 12, a proportional mixer 16, a foamer 17 and a pressure relief valve 18, and the water connection 11 is horizontal to the proportional mixer 16 through a water pipeline. connection, a filter I13-1 and a regulating valve I14-1 are arranged on the water pipeline; the liquid inlet end of the proportional mixer 16 is connected with a foaming agent suction pipeline, and a filter is arranged on the foaming agent suction pipeline III13-3, micro control valve 15; the air joint 12 is connected horizontally with the bubbler 17 through the air pipeline, and a filter II13-2 and a regulating valve II14-2 are arranged on the air pipeline; the bubbler 17 and The outlet port of the proportional mixer 16 is vertically connected; the pressure relief valve 18 is installed at the end of the foam output pipeline at the outlet of the foamer 17; the pressure water pipeline 9 is connected with the water joint 11; the pressure air pipeline 10 Connect with wind connector 12. When working, after the pressure water passes through the jet parts in the proportional mixer 16, a negative pressure space is formed inside the proportional mixer 16, and the foaming agent can be sucked into the proportional mixer 16 through the filter III13-3 and the micro-control valve 15 Mix well with water to form a foaming liquid. The foaming liquid enters the foamer 17 vertically along with the pipeline, and the air inlet pipe is connected to the foamer 17 horizontally. Mix with air to form foam evenly. At the same time, the pressure relief valve 18 installed at the outlet of the foam pipeline, under normal circumstances, the foam can be smoothly output through the foam outlet. In the case of blockage of the foam distribution system or the special foam nozzle, the pressure relief valve 18 can remove the residual pressure. Effectively avoiding the damage of the high pressure to the internal rotating seal and other components of the cutting head 8 of the roadheader.

As shown in Figure 3, the foam distribution system 2 includes a water inlet sleeve 24 and a central water guide pipe 21 built in the cutting main shaft 19 of the roadheader. Between the cutting arms 7, the end of the cutting arm 7 of the roadheader has a water guide hole 22 communicated with the central water guide pipe 21, and the cutting main shaft 19 of the roadheader, the water inlet sleeve 24 and the cutting arm 7 of the roadheader are opened. There is a through hole communicating with the central water guide pipe 21, and a pipeline is installed at the through hole, and the foam inlet 20 at one end of the pipeline, the central water guide pipe 21, the water guide hole 22 and the water chamber 23 are connected to each other; the cutting arm of the roadheader The bottom of 7 is provided with leaking plug 26 near water inlet jacket 24 places. After the foam is full of the water chamber 24, it will be sprayed out from the fixed internal spray foam nozzle 27 on the nozzle base 25 connected with the water chamber 24. The leaking plug arranged under the cutting arm 7 of the roadheader in the foam distribution system 2 can ensure that after the water inlet sleeve or other sealing parts fail, the leaked foam is discharged, preventing the foam from entering the bearing in the cutting arm 7 of the roadheader, and improving the The reliability of the foam distribution system has a very strong original innovation.

The foam terminal injection system 3 includes a nozzle base 25 and a special nozzle 27 for spraying foam installed on the nozzle base 25. The nozzle base 25 is installed in the middle of the cutting head 8 of the roadheader and communicates with the water chamber 23. ; As shown in Fig. 4 to Fig. 7, the nozzle base 25 is threadedly connected with the special nozzle 27 for internal spray foam or connected by a quick connection.

Wherein, the special nozzle 27 for internal spray foam is a central through-hole structure with an aperture of 6-8 mm, and the both sides of the hole are provided with filter screens 28 to prevent clogging. The filter screen 28 can not only prevent dust from entering the special nozzle 27 for internal spray foam and In the foam dispensing system 2, the foam can also be foamed a second time.

When the roadheader begins to cut coal and rock, the regulating valve 14 on the air-water pipeline of the foam preparation system 1 and the micro-control valve 15 on the foaming agent pipeline can be opened, and the foam preparation system 1 starts to work to generate a large amount of high-quality dust-removing foam. The foam is stably sent to the foam terminal injection system 3 on the cutting head 8 of the roadheader through the foam distribution system 2, and the foam can be piled up to make the injected foam continue to accumulate on the pick, so that it can work in the foam package , Wet the coal and rock mass and suppress the generation of dust, reduce the generation of dust from the source, and at the same time cool the pick, eliminate sparks, and dilute the coal dust and gas. The system has strong intrinsic safety, easy operation and high reliability. The foam conveying pipeline is arranged on the lower side of the roadheader guard plate, which can prevent the foam conveying pipe from being smashed by the collapsing coal and rock, and ensures the efficient and stable operation of the equipment.

Claims (5)

1. A roadheader internal spray foam dust removal system, characterized in that it includes a foam preparation system (1), a foam distribution system (2), a foam terminal injection system (3), a pressurized water pipeline (9) and a compressed air pipeline (10), the foam preparation system (1) is fixedly installed on the machine cover of the roadheader through a permanent magnetic jack (4), and is connected to the foam distribution system (2) through a foam delivery pipe (5); the foam The delivery pipe (5) is installed on the underside of the roadheader guard plate (6); the foam distribution system (2) is built into the cutting arm (7) of the roadheader; the foam terminal injection system (3) is installed in the roadheader In the middle of the machine cutting head (8), the pressure water pipeline (9) and the pressure air pipeline (10) are both connected to the foam preparation system (1). 2. A roadheader internal spray foam dust removal system according to claim 1, characterized in that the foam preparation system (1) includes a water joint (11), an air joint (12), and a proportional mixer (16) , foamer (17) and pressure relief valve (18), the water joint (11) is horizontally connected to the proportional mixer (16) through a water pipeline, and a filter I (13-1) and a regulating valve are arranged on the water pipeline I (14-1); the liquid inlet end of the proportional mixer (16) is connected with a foaming agent suction pipeline, and a filter III (13-3) is arranged on the foaming agent suction pipeline, and micro-control valve (15); the air joint (12) is horizontally connected to the bubbler (17) through the air pipeline, and a filter II (13-2) and a regulating valve II (14-2) are arranged on the air pipeline; The foamer (17) is vertically connected to the outlet end of the proportional mixer (16); the pressure relief valve (18) is installed at the end of the foam output pipeline at the outlet of the foamer (17); the pressure water pipeline (9) is connected with the water joint (11); the pressure air pipeline (10) is connected with the air joint (12). 3. A roadheader internal spray foam dust removal system according to claim 1 or 2, characterized in that the foam distribution system (2) includes a water inlet jacket (24) and a cutting spindle (19) built into the roadheader ), the water inlet sleeve (24) is set between the cutting spindle (19) of the roadheader and the cutting arm (7) of the roadheader, and the end of the cutting arm (7) of the roadheader There is a water guide hole (22) connected with the central water guide pipe (21) at the top, and there is a water guide hole (22) connected with the central water guide pipe on the roadheader cutting main shaft (19), the water inlet sleeve (24) and the roadheader cutting arm (7). (21) Connected through holes, where a pipeline is installed, and the foam inlet (20), central water guide pipe (21), water guide hole (22) and water chamber (23) at one end of the pipeline are connected to each other; A water leakage plug (26) is provided near the water inlet sleeve (24) below the cutting arm (7) of the roadheader. 4. A roadheader internal spray foam dust removal system according to claim 3, characterized in that, the foam terminal spray system (3) includes a nozzle base (25) and a nozzle installed on the nozzle base (25) A special nozzle (27) for internal spray foam, the nozzle base (25) is installed in the middle of the cutting head (8) of the roadheader and communicated with the water chamber (23); the nozzle base (25) is connected to the internal spray foam The special nozzles (27) are threadedly connected or connected by a quick connection form. 5. A roadheader internal spray foam dust removal system according to claim 4, characterized in that the special spray head (27) for internal spray foam is a central through-hole structure with a diameter of 6-8mm, and the two sides of the hole are set There is a filter screen (28) to prevent clogging.