RU2678218C1 - Device for production of water mist in coal mine - Google Patents

Abstract

FIELD: coal industry.SUBSTANCE: invention relates to the coal industry, to a device for the production of water mist and the supply of this mist to the mine workings due to the air movement of the mine ventilation system. Device produces water mist using the static pressure of water in the fire and irrigation piping of the mine. For the production of water mist, fogging hydraulic nozzles, fogging pneumatic-hydraulic nozzles installed on the collectors, a portable collapsible fine water filter assembly assembled with the control unit body are used, along with portable collapsible fine filter compressed air assembly with the control unit housing, interconnected by high-pressure hoses with quick-disconnect couplings. Device is used to fight dust in coal mines.EFFECT: technical result is the creation of a technical adjustable and at the same time sufficiently effective device for the production of water mist in the coal mine.7 cl, 10 dwg

Description

The invention relates to the coal industry to a device for the production of water fog and the supply of this fog through the mine workings. An effective and relatively inexpensive technical solution for suppressing coal dust by spraying water with an equivalent particle diameter of 20 μm to 100 μm into the dust generation zone is known from the general technical level. Particles of water with an equivalent diameter of 20 μm to 100 μm can soar in the air for a certain time, attract dust particles to themselves and, as a result, bind the dust particles, then precipitate under their weight. If dust particles are not attracted to water particles by their physicochemical properties, then part of the dust particles collide with water particles, due to this it loses speed and then also precipitates. Particles of water mist with an equivalent diameter of 10 to 50 microns give the greatest dust suppression efficiency. From the general technical information provided on the Internet on the official websites of companies, it is known that various companies have mastered the production of nozzles for the production of water fog with an equivalent diameter of water particles from 15 μm to 100 μm, and such type of nozzles are designated as fog-forming nozzles. These nozzles are of two types. The first type is two-phase or pneumohydraulic nozzles, in foreign technical literature - “air atomizing nozzles”. Two-phase nozzles are nozzles in which 2 media (2 phases) liquid (water) and gaseous (compressed air) are mixed; in this case, one medium 1 (compressed air) moves along the nozzle design with a speed of at least 20 times greater than the other medium 2 (water), as a result, when mixing the media, medium 1 moving at a higher speed colliding with medium 2 causes in medium 2 mechanical vibrations (waves) that destroy the medium 2 and give it an impulse for movement, as a result of which the water breaks up into very small drops, equivalent in diameter from 15 microns to 100 microns, which then fly out of the nozzle. For the effective operation of pneumohydraulic nozzles, a relatively small water pressure of 2 at. up to 10 at., while the quality of the water, that is, the presence of mechanical impurities in the water, does not have a decisive effect on the quality of the nozzles, but compressed air with a pressure of at least 2 at., and a constant flow rate is required to ensure stable operation of the nozzles. The second type of nozzles are single-phase hydraulic mist-forming nozzles. Single-phase nozzles are nozzles in which one liquid medium (one phase) due to the design features of the nozzle and high water pressure, gets inside it is crushed into small parts and then flies out of the nozzle. For the effective operation of hydraulic fogging nozzles, water with a minimum of mechanical impurities and a high pressure of 10 atm are required. Manufacturers of effective fogging nozzles, single-phase or two-phase, test nozzles to determine the size of water mist droplets at various pressure values applied to the nozzles water and compressed air. In the patent RU 2477798 a method for producing water fog is described. Water without adding air, at a water pressure of at least 200 bar, is fed through a nozzle onto a flat reflective surface for spraying in the form of mist droplets. This method of producing fog from water in a coal mine is considered as an alternative to the use of water-air (pneumohydraulic) nozzles to produce water fog. The patent states that a water pressure of 200 bar is created by a special pump of the hydraulic system, which is used in the mine in various technological processes, while water is understood to mean the working fluid of the hydraulic system, the water flow rate for this method of fogging is 7-10 liters per minute for one nozzle with a diameter of 0.8 mm. The description of the patent does not discuss the comparison of the application of the method with conventional fog-forming hydraulic nozzles, for example, with a single-phase axial polo-cone fog-forming nozzle of high pressure for dust suppression of the 220 series (Axial-flow hollow cone nozzles) manufactured by Lechler GmbH (information from the website of the company www.lechler. de), which is issued in the country where the initial priority for the invention was obtained. This nozzle produces fog from water at a water pressure of 10 bar to 100 bar, with a maximum water flow rate of 1.75 liters per 1 minute. The nozzle design has been tested, its serial production has been mastered. There is no practical restriction on the use of the nozzle in the mine, subject to the requirement of supplying water to the nozzle with minimal impurities, to prevent clogging. But this requirement is also practically necessary to fulfill for the method specified in the patent, since the nozzle diameter of the patent is less than 1 mm. Patent RU 2477798 has a number of technological disadvantages in practical application in a coal mine, such as: using the existing hydraulic system to generate water fog, which leads to additional energy costs for the operation of the hydraulic system; hydraulic fluid consumption for the formation of water fog; the need to use a pump to increase the water pressure to a level of at least 200 bar to ensure the method, in the absence of the necessary hydraulic system; a sufficiently large flow rate of 7-10 liters per minute, which will lead to undesirable moistening of the soil production. In the patent RU 53722 for a utility model, a mine steam generator is presented, which generates water vapor by heating water in a hydrodynamic heat generator. Steam mixes with air and moves along it along the mine, penetrates into the most inaccessible places of mining, cools, turns into condensate, and during this process it coagulates and precipitates coal dust. The description does not provide an example of the practical application of a mine steam generator for suppressing coal dust. The mine steam generator indicated in the utility model operates using an electric motor. In an extensive network of underground mine workings of a coal mine there are areas where the supply of electric energy for applying the specified method of generating water vapor for dust suppression is associated with significant economic costs. The use of this mine steam generator in a mine is characterized by the distance at which the steam from the steam generator moving with the mine air condenses and precipitates, that is, along the length of the extended mine working with dust sources (for example, a conveyor drift 1.5-2 km long with installed with a belt conveyor) it is necessary to install several steam generators, which entails additional technological work related to the supply of electricity and the provision of explosion protection orudovaniya steam.

According to the requirements of regulatory documents: "Instructions for the development of a fire protection project for a coal mine. RD 05-365-00"; "Instructions for the design of fire-irrigation water supply for mines. RD 05-366-00" all underground mine workings of coal mines should be equipped with a fire-irrigation pipeline to: provide water to extinguish the fire and the installation of water curtains on the way it spreads anywhere in the mountain mine workings; water supply for irrigation and dust suppression. The diameter of the pipeline is regulated from 100 mm. The instructions indicate that the dynamic pressure of water during the development of formations at a depth of more than 200 meters should decrease and not exceed at the exit from fire hydrants with a normalized flow rate of 0.6-1.5 MPa for fire fighting in a network. Pressure reduction is regulated by reducing hydraulic units or by means of unloading ponds. In the absence of discharge ponds in the hydraulic network of the mine’s fire-irrigation pipeline, the static pressure of the water in the pipeline in at. will be equal to the pressure of the water column in height from the location of the tank with water that feeds the fire-irrigation pipeline to the depth at which the pipeline is laid in at., where 1 at. = 10 m of water column. According to the requirements (“Instructions for the fight against dust in coal mines”, Order of Rostekhnadzor dated 10/14/2014 N 462), it is regulated to install dust-free fog-forming curtains in the face and tunnel faces. When promoting a face or a face, respectively, installation or dismantling of a fire-irrigation pipeline is carried out. At the same time, for objective technological reasons, during the installation and dismantling works, rock and dust fall into the fire-irrigation pipeline. Currently, various companies have mastered the production of fogging nozzles single-phase or two-phase. For these nozzles, the parameters of water and air pressures are determined at which they work most efficiently and produce water fog with stable sizes of water particles. For most fogging nozzles, it is necessary to provide a water supply with a minimum content of impurities.

The technical problem to which the present invention is directed is the creation of a cheap, technically simple to maintain, but sufficient effective device for the production of water fog in a coal mine. The problem is solved by using a device for the production of fine water fog UPMVT RSDF.612451.001 according to TU28.25.14-007-50576573-2016, which consists of: a portable collapsible filter housing for water purification with a control unit housing with a throttle and pressure gauges, a portable collapsible shell compressed air purification filter assembly with control unit housing with throttle and pressure gauge, high-pressure hoses with quick couplings, manifolds with installed pneumatic-hydraulic or fog-forming fogging with hydraulic nozzles, the collectors are suspended on the roof of a mine. To generate fine water mist, the UPMVT device uses the static pressure of water in the mine’s fire-irrigation pipeline. The minimum required water pressure for the fogging hydraulic nozzles used in the device to generate fine water fog is 10 at., The water flow rate per nozzle does not exceed 20 liters per 1 hour of operation. The maximum water pressure for the fog-forming pneumohydraulic nozzles used in the device is 10 at., The water flow rate per nozzle for generating fine water mist does not exceed 20 liters per 1 hour of nozzle operation. SUMMARY OF THE INVENTION

Each mine in a coal mine is equipped with a fire-irrigation pipeline. The value of the static pressure of water in the fire-irrigation pipe is equal to the pressure of the water column, a height equal to the depth of generation from the location of the tank with water that feeds the fire-irrigation pipe. When developing coal deposits with long pillars along strike, as the tunneling face advances during drift or when equipment moves along the drift while advancing the working face, the depth of the drift from the mine’s surface changes slightly over the entire length of the drift, depending on the bedding conditions, by 5 m to 20 m. That is, changes in the pressure of the water column in the drift when moving equipment along the drift will be from 0.5 at. up to 2 at. Such a change in pressure is insignificant and for this reason, to reduce the pressure of the water supplied from the mine’s fire-irrigation pipeline to the fogging nozzles, a simple and cheap device can be used - a water flow regulator (throttle) in which, by reducing the cross-sectional area through which water passes, it decreases water pressure at a constant flow rate and almost unchanged pressure of water supply to the throttle. In the throttle body (1) of FIG. 1 there is a calibrated hole in the form of a cylinder into which a screw with a cylinder (2) of the corresponding diameter is screwed. As a result of this, the flow rate of water through the throttle sharply slows down, which, with a constant flow rate of water, by hydraulic fogging and pneumohydraulic fogging nozzles, reduces the pressure of the water head and, accordingly, the pressure of the water supplied to the nozzles. At the same time, as the device moves along the length of the drift, constant adjustment of the throttle is not required, since the change in the static water pressure is insignificant. For water purification, taking into account the constant movement of tunneling and treatment equipment along the drift, a collapsible portable filter housing is used assembled with the control unit housing, FIG. 3. The filter housing is made of a thick-walled hot-deformed pipe (7) to which a collar flange (8) is welded on one side, and a plate (9) is welded to it on the other side of the pipe with a round hole in the center through which it is inserted into the pipe (7) and then the hollow rod (4) of FIG. 2 with holes for water passage, a cylindrical plug (5) with an external thread is welded on one side of the rod, a hollow sleeve (6) with an external thread is welded on the other side of the rod, a special nut (10) is screwed onto the stem plug to fix the filter element ( 11) with a conditional fineness of filtration of 5 μm, made of textured propylene or polyamide yarns, which is mounted on the rod inside the pipe (7). The collar flange (8) is closed using studs with a plug (12) in which the hole is made, a l-shaped quick-connect coupling (13) is welded into the hole. A throttle (14) is screwed onto the stem bushing (6) of the rod (4), the throttle (14) is connected with a flexible high-pressure rubber sleeve (15) with a quick disconnect coupling (16). A metal box (17) with hinged lids is welded on top of the plate (9), which covers the throttle (14) from mechanical damage during operation of the filter in a mine. For suspension to structural elements and for carrying the filter housing to the pipe (7) and to the metal box (17), the loops (18) of the metal cable are welded. To clean from contamination of the inner surface of the pipe (7) and the outer surface of the filter element (11) using water or compressed air, a thick-walled tube (19) with an internal thread is welded into the pipe (7). Fogging hydraulic nozzles (20), FIG. 4, FIG. 5 are mounted on a special saddle (21) with quickly detachable connections, the saddles are connected to each other by high-pressure hoses (22), designed for a pressure of 350 bar, with quick disconnect connections in prefabricated manifolds with nozzles: in a closed line of FIG. four; into the open line of FIG. 5. Prefabricated collectors are attached to the roof of the mine using metal rings (25). For a more efficient supply of water mist to the cutting zone of a roadheader in a tunnel face, prefabricated collectors assembled in a closed line, FIG. 4, suspended in the center of the axis of the ventilation pipe at a distance of not more than 1 m from the end of the ventilation pipe. Fog-forming pneumohydraulic nozzles (28) are connected by means of overhangs (29) to a collector (30) made of pipes welded into a closed line through which water is supplied and, using flexible rubber high-pressure hoses (32), are connected to a collector (31) made of welded into an open pipe line through which compressed air is supplied.

The device is connected to the mine’s fire-irrigation pipeline using a special insert with flanges (46) and a quick-connect connection (47), FIG. 9. A ball valve with quick couplings is attached to the insert, high-pressure hoses with quick couplings are connected to the ball valve. The operation of the device with hydraulic fog nozzles. The hydraulic circuit of the device is shown in FIG. 7. At a coal seam development depth of more than 200 m from the level of the surface, the static pressure of the water column in the fire-irrigation pipeline is more than 20 at. Such a pressure is sufficient to generate fine water mist with the hydraulic mist-forming nozzles used in the device. The device’s water consumption when using 10-15 nozzles on the collectors of the device will be 200-300 liters per 1 hour of continuous operation of the device. After opening the tap (38), water from the fire-irrigation pipe of the shaft (39) enters through a high-pressure hose with quick-disconnect connections (26) into the body of a collapsible portable water filter (37), then passes through the filter element (11) and flows through the rod (4) to the throttle (14), passing through the throttle, water reduces the pressure to the value optimal for the operation of fogging nozzles, then through the high-pressure sleeve (15) and high-pressure sleeve (26) with quick-disconnect connections, the water enters the fogging hydra personal nozzles (20) installed on a collection rail (32) in a closed line and installed on a collection rail (33) in an open line. In the mist-forming nozzles (20), the water breaks up into small droplets ranging in size from 50 μm to 100 μm and then is pushed out of the nozzles into the mine working in the form of fine water fog. Due to the movement of air through the mine, finely dispersed water fog moves along the mine, where drops of fog collide with rock and coal dust, resulting in the deposition of rock and coal dust on the soil of the mine. As the device operates, after a certain time of continuous operation, a mandatory regular replacement of the filter element (11) is performed. Before replacing the filter element (11), the inner surface of the pipe (7) is cleaned with water pressure by connecting a high-pressure hose with water to the pipe (19) after opening the plug (12). When driving a face or moving a face, moving the filter, prefabricated manifolds with fogging nozzles and high-pressure hoses in the direction of movement of the faces, respectively, with the installation or dismantling of the fire-irrigation pipe (39).

The order of operation of the device with fog-forming pneumohydraulic nozzles. The hydraulic circuit of the device is shown in FIG. 8. At a coal seam development depth of less than 200 m from the level of the day surface, the static pressure of the water column in the fire-irrigation pipe is less than 20 atm. Such pressure is not enough for the efficient generation of fine water mist by hydraulic mist-forming nozzles. In this case, the maximum water pressure for the effective operation of pneumohydraulic fog-forming nozzles requires 10 at. The device’s water consumption when using 10-15 fog-forming pneumohydraulic nozzles on the device’s manifolds will be 200-300 liters per 1 hour of continuous operation of the device at a maximum water pressure of 10 atm. To operate the device with pneumohydraulic fog-forming nozzles, it is necessary to supply compressed air from the impurities and purified water from the impurities to the nozzles. After the tap (38) is opened, water from the fire-irrigation pipe of the shaft (39) enters through a high-pressure hose with quick-disconnect connections (26) into the body of a collapsible portable water filter (43), then it passes through the filter element (11) and flows through the rod (4) to the throttle (14), passing through the throttle, the water reduces the pressure to the value optimal for the operation of fog-forming pneumohydraulic nozzles, then through the high-pressure sleeve (15) and high-pressure sleeve (26) with quick-disconnect connections, water flows to manoeuvrable pneumohydraulic nozzles (27) mounted on a manifold (40) made of pipes welded into a closed line. To reduce the pressure supplied to the pneumohydraulic fog-forming nozzle, an adjustable throttle (14) is used. The portable collapsible filter for cleaning compressed air (42) is similar in design to the portable collapsible filter for water (Fig. 3) is connected to the supply line of compressed air (44). Compressed air from the line (44) after opening the valve (38) enters the collapsible portable filter housing (42) along the high-pressure sleeve (26) passes through the filter element (11) and is cleaned of impurities, then it flows through the high-pressure hoses with quick-disconnect connections ( 26) into pneumohydraulic nozzles (27). In the chambers of pneumohydraulic nozzles, compressed air at a pressure of 5 atm. up to 8 at. crushes water into drops with an equivalent diameter of up to 15 microns and then pushes the drops through the nozzle nozzle into the mine. Due to the movement of air through the mine, finely dispersed water fog moves along the mine, where drops of fog collide with rock and coal dust, resulting in the deposition of rock and coal dust on the mine soil. As the device operates, after a certain time of continuous operation, a mandatory regular replacement of the filter element (11) in the filter for water and compressed air is performed. Before replacing the filter element (11), the inner surface of the pipe (7) is cleaned by blowing with compressed air by connecting a high-pressure hose with compressed air to the tube (19) after opening the plug (12). When advancing the face or when moving the working face, the filter, collector with fog-forming nozzles and high-pressure hoses are moved in the direction of movement of the faces, respectively, with the installation or dismantling of the fire-irrigation pipe (39) and the compressed air supply pipe (44).

Usage example.

Example 1. When conducting mining at one of the mines in Kuzbass by mixed slaughter, the irrigation system of a roadheader did not allow to effectively suppress coal and rock dust. With an increase in the number of hydraulic nozzles that were additionally installed on a roadheader, the dust suppression increased slightly, but at the same time the water consumption increased significantly, as a result of which the soil of the mine was moistened and lost its compressive strength. Installation of rock dust suppression system using pneumohydroirrigation was not possible due to the inability to ensure the supply of compressed air in the required amount. To solve the problem of dust suppression in the face, a device was installed UPMVT RSDF.612451.001 according to TU28.25.14-007-50576573-2016. The hydraulic circuit of the device is shown in FIG. 7. The device was connected to a local fire and irrigation pipeline (39). The depth of production from the surface was 420 m, the static pressure of the water in the fire-irrigation pipe exceeded 20 atm. 7 hydraulic fog-forming nozzles (20) were installed on the prefabricated collector (32) in the closed line of the device, and the collector in an open line ( 33) 6 fogging nozzles (20) were installed. Technical characteristics of nozzles (20): the minimum pressure of water supplied to the nozzle for generating fine water mist with an average equivalent diameter of droplets of 50 μm is 10 atm; water consumption per nozzle does not exceed 20 liters per 1 hour of operation. The prefabricated collector (33) was mounted on the working rabbit perpendicular to the working axis above the reloader (50) of the combine (49) of FIG. 10, the prefabricated collector (32) was suspended from the roof of the mine at a distance of 1 m from the end of the ventilation pipe (48). During production by a tunneling machine (49), air from a ventilation pipe (48) captured drops of fine water mist, which was produced by hydraulic fog-forming nozzles of a prefabricated collector (32) as a result of which drops of water fog fell into the cutting zone of a tunneling machine (51) where they collided with particles coal and rock dust, as a result of which particles of coal and rock dust lost speed and precipitated. The second prefabricated collector (33) produced water fog, which was produced by hydraulic fog-forming nozzles above the combine reloader (50). A stream of air (52) mixed particles of coal, rock dust and fine water fog generated by the collector (33), as a result of which particles of coal and rock dust collided with water particles and precipitated. An uncontrolled throttle (36) was installed in the control unit housing for the water filter housing (37) to reduce the pressure of the water supplied to the fog-forming hydraulic nozzles (20) to a value at which the optimum relationship was achieved between the average equivalent particle diameter of the water fog and the flow rate of liters / hour one nozzle. The relationship between the value of the pressure of the water supplied to the nozzle, the value of the average equivalent diameter of the droplets of water mist and the flow rate of water is indicated by the manufacturer of the fogging hydraulic nozzles used on the device. As a result of the use of the UPMVT RSDF.612451.001 device according to TU28.25.14-007-50576573-2016 with hydraulic fog-forming nozzles, it was possible to achieve a significant reduction in air dustiness during production due to moistening of the cutting zone and the zone of the combine loader, while the use of the device did not lead to significant wetting soil drift. The use of the device did not change the technology of mining and did not increase the cost of production.

Example 2. To combat coal dust during coal mining, at a depth of 160 m from the level of the day surface, the UPMVT RSDF.612451.001 device according to TU28.25.14-007-50576573-2016 with pneumohydraulic fog nozzles was used. The device diagram is shown in FIG. 8. The device was connected to a local fire and irrigation pipeline (39). On the collector of the device (40), made of pipes welded into a closed line, 4 fog-forming pneumohydraulic nozzles (27) were installed. Technical characteristics of nozzles (27): maximum pressure of water supplied to the nozzle is 8 at .; maximum pressure of compressed air supplied to the nozzle is 8 at .; technically achievable minimum equivalent diameter of water mist droplets of 15 microns. The collector (40) was suspended from the roof of the mine at a distance of 1 m from the end of the ventilation pipe (48). During production by a roadheader (49), air from the ventilation pipe (48) captured drops of fine water mist, which was produced by the pneumohydraulic mist-forming nozzles of the collector (40), as a result of which water droplets fell into the cutting zone (51) of the roadheader. A stream of air (52) mixed particles of coal, rock dust and fine water fog generated by the collector (40), as a result of which particles of coal and rock dust collided with water particles and precipitated. An adjustable throttle (14) was installed in the control unit housing for the water filter housing (43) to reduce the pressure of the water supplied to the fog-forming pneumohydraulic nozzles (27). An adjustable throttle (14) was installed in the housing of the control unit of the filter housing for compressed air (42) to reduce the pressure of compressed air and its flow rate supplied to the fog-forming pneumohydraulic nozzles (27). To obtain the most optimal pressure of water and compressed air supplied to the nozzles (27) for a minimum water flow rate, a minimum compressed air flow rate when reaching the maximum dust suppression, water flow rate measurements were carried out, which were determined by the water flow meter (45), at a water pressure value using a pressure gauge (41), the pressure value of compressed air according to the pressure gauge (41). Lowering or increasing the pressure of water and compressed air, which were supplied to the nozzles (27) was carried out using an adjustable throttle (14). As a result, the optimal values of the pressure of water and compressed air supplied to the fogging nozzles were determined, at which the maximum dust suppression efficiency was achieved with a minimum water consumption. When moving the device after the advancement of the face, the control was carried out using manometers (41) of the pressure of water and compressed air supplied to the nozzles (27) and, when the pressure values changed, the pressure was regulated using chokes (14) to the optimum values. As a result of the use of the UPMVT RSDF.612451.001 device according to TU28.25.14-007-50576573-2016 with pneumohydraulic fog-forming nozzles, it was possible to reduce air dust due to the use of pneumohydroirrigation of the cutting zone with water fog supplied by a fresh air stream into the cutting zone. The use of the device did not change the technology of the development and did not increase the cost of production.

Brief explanation of the drawings.

In FIG. 1 is a schematic sectional view of an adjustable throttle:

1. Throttle body;

2. Adjusting screw with cylinder;

3. Technological stub.

In FIG. 2 is a schematic sectional view of a precast rod:

4. Hollow stem with holes for water passage;

5. Cylindrical plug with external thread;

6. Hollow sleeve with external thread.

In FIG. Figure 3 shows an assembly schematic section of a collapsible portable housing for the RSDF.061152.003 water filter assembly with the housing of the RSDF.614337.001-01 control unit:

7. Thick-walled hot-deformed pipe;

8. Collar flange;

9. A plate with a hole in the center;

10. Special nut;

11. Filter element made of textured propylene or polyamide yarns;

12. Cap for the collar flange;

13. L-shaped quick-connect coupling;

14. Adjustable throttle RSDF.306412.001;

15. High pressure sleeve;

16. Quick coupler coupling;

17. Metal box with hinged lids;

18. A loop from a cable;

19. Thick-walled tube with internal thread.

In FIG. 4 shows a schematic representation of a prefabricated in a closed line collector RSDF.306543.001 device UPMVT RSDF.612451.001 according to TU28.25.14-007-50576573-2016:

20. Hydraulic fogging nozzle;

21. Saddle with quick-release couplings;

22. High pressure sleeve with quick couplings DN 10 WP 350 bar;

23. Angular quick coupler coupling DN 10;

24. Coupling of quick disconnect connection t-shaped DN 10 / DN12;

25. Metal ring from rolled round AIII, rolled diameter 8 mm;

26. High-pressure hose DN 12 WP 160 bar with quick couplings.

In FIG. 5 is a schematic representation of an assembly into an open line collector RSDF.306543.001 device UPMVT RSDF.612451.001 according to TU28.25.14-007-50576573-2016:

27. Cap for quick coupler coupling.

In FIG. Figure 6 shows a schematic representation of a collector made of pipes welded into a closed line RSDF.306542.002 device UPMVT RSDF.612451.001 according to TU28.25.14-007-50576573-2016:

28. Pneumohydraulic nozzle;

29. Sgon;

30. A collector for water;

31. A collector for compressed air;

In FIG. 7 shows the hydraulic circuit of the UPMVT RSDF.612451.001 device according to TU28.25.14-007-50576573-2016 for working with hydraulic fog nozzles:

32. Collector in a closed line collector RSDF.306543.001-01 with hydraulic fogging nozzles;

33. Collector in an open line collector RSDF.306543.002-01 with hydraulic fog nozzles;

34. Flow divider;

35. Pressure gauge DM2029U2-10MPa;

36. Non-adjustable throttle RSDF.306412.002;

37. Portable collapsible housing for the RSDF.061152.003 water filter assembly with the housing of the RSDF.614337.001-01 control unit;

38. Ball valve with quick couplings;

39. Fire and irrigation pipeline in a mining.

In FIG. 8 shows the hydraulic circuit of the UPMVT RSDF.612451.001 device according to TU28.25.14-007-50576573-2016 for working with pneumohydraulic fog-forming nozzles:

40. A collector made of RSDF.306542.002 pipes welded into a closed line with pneumohydraulic fog-forming nozzles;

41. Pressure gauge DM2029U2-1.6MPa;

42. Portable collapsible housing filter for compressed air RSDF.061439.001 complete with the body of the control unit RSDF.614337.001-02;

43. Portable collapsible housing; water filter RSDF.061152.002 complete with housing of the control unit RSDF.614337.001-01;

44. Pipeline for compressed air in a mine;

45. Water consumption meter.

In FIG. 9 is a schematic illustration of an insert with flanges:

46. Insert with flanges;

47. Quick coupler coupling.

In FIG. 10 is a schematic representation of a plan for a tunnel face:

48. Ventilation pipe;

49. Roadheader;

50. Loader for roadheader;

51. Cutting zone during mining;

52. The direction of air movement in the face.

Literature.

1. RU 2477798.

2. www.lechler.de

3. RU 53722.

4. Instructions for the development of a project for the fire protection of a coal mine. RD 05-365-00.

5. Instruction for the design of fire-irrigation water supply for mines. RD 05-366-00.

6. TU28.25.14-007-50576573-2016.

Claims (7)

1. A device for generating water fog in a coal mine, consisting of a collapsible portable water purification filter assembly with a control unit body, a throttle and pressure gauges, high-pressure hoses with quick disconnect connections, a manifold with fog-forming nozzles, is connected to the mine fire-irrigation pipeline, characterized in that the filter housing is made of a thick-walled hot-deformed pipe to which a collar flange is welded on one side, and a round plate is welded to it on the other side of the pipe with a central hole through which a hollow rod with holes for water passage is inserted into the pipe and then welded to the plate, a cylindrical plug with an external thread is welded on one side of the rod, a hollow sleeve with an external thread is welded on the other side of the rod, a special plug is screwed on a nut that fixes a filter element with a conditional filtration fineness of 5 μm, made of textured propylene or polyamide threads, which is mounted on the rod inside the pipe, collar flange The core is closed with studs with a plug in which the hole is made, a quick-connect coupling is welded into the hole, a throttle is screwed onto the stem sleeve, a hole is made in the form of a cylinder in the throttle body, into which a screw with a cylinder is screwed, a metal box with hinged lids is welded on top of the plate , which closes the throttle from mechanical damage during operation of the filter in a mine, a metal cable loop is welded to the pipe and to the metal box to clean it of the inner surface of the filter housing pipe and the outer surface of the filter element, a thick-walled pipe with a female thread is welded to the pipe with the help of water pressure; a high-pressure hose with water is connected to it; a fog-forming hydraulic nozzle spends maximum 20 for generating water fog with an average equivalent diameter of water droplets of 50 μm liters of water for 1 hour of operation, the minimum water pressure for the nozzle is 10 atm, the nozzle is mounted on a special saddle with quick-disconnect connections between them, saddles are connected by high-pressure sleeves with quick-disconnect connections to the collector in a closed line or in an open line, the collector is attached to the roof of the mine using metal rings, the rings are welded to the saddles, water is supplied from the collapsible portable filter assembly with the housing control unit with a throttle and pressure gauges on high-pressure hoses with quick-disconnect couplings in a prefabricated manifold for nozzles. 2. The device according to claim 1, characterized in that for supplying water fog to the cutting zone of the roadheader in the face, a pre-assembled collector with fog-forming hydraulic nozzles, assembled in a closed line, is suspended from the roof of the mine in the center of the axis of the ventilation pipe at a distance of not more than 1 m from the end of the ventilation pipe. 3. The device according to claim 1, characterized in that a thick-walled tube with a quick disconnect coupling is welded into the pipe. 4. A device for generating water fog in a coal mine, consisting of a collapsible portable filter for water treatment complete with a control unit body, a throttle and pressure gauges, a collapsible portable filter for cleaning compressed air complete with a control unit body, a throttle and pressure gauges, high-pressure hoses with quick disconnect connections, the collector with fogging nozzles, the device is connected to the fire-irrigation pipe of the mine and to the compressed air supply, characterized in that the filter housing for For water, it is made of a thick-walled hot-deformed pipe to which a collar flange is welded on one side, and a plate with a round hole in the center is welded to it on the other side of the pipe, through which a hollow rod with holes for water passage is inserted and then welded to the plate, with a cylindrical plug with an external thread is welded on one side of the stem, a hollow sleeve with an external thread is welded on the other side of the stem, a special nut is screwed onto the stem plug to fix the filter an element with a conditional filtration fineness of 5 μm, made of textured propylene or polyamide threads, which is mounted on the rod inside the pipe, the collar flange is closed with studs with a plug in which the hole is made, a quick-disconnect coupling is welded into the hole, a throttle is screwed onto the stem bushing, The throttle case has a hole in the form of a cylinder into which a screw with a cylinder is screwed; a metal box with hinged covers is welded on top of the plate, which closes the other the loops from mechanical damage during operation of the filter in a mine, a metal cable loop is welded to the pipe and to the metal box, to thicken the inner surface of the filter housing pipe and the outer surface of the filter element, a thick-walled tube is welded to the pipe with water pressure, to which a high-pressure hose with water is connected, the fog-forming pneumohydraulic nozzle spends to generate water fog with a technically achievable minimum equiv a valence diameter of water droplets of 15 μm, a maximum of 20 liters of water per 1 hour of operation, the maximum water pressure for operation of the nozzle is 10 atm, the nozzle is mounted with the aid of the exhaust nozzles onto a manifold made of pipes welded into a closed line, a quick-disconnect coupling is welded to the collector, connected to the coupling high-pressure hoses with quick disconnect connections for supplying water to the collector from a portable water purification filter assembly with a control unit housing with a throttle and pressure gauges, the collector is attached to the roof of a mine and with the help of metal rings, the rings are welded to the collector, a portable collapsible water filter assembly with a control unit housing, a throttle and a manometer is used to purify compressed air, compressed air from the filter is supplied to fog-forming pneumohydraulic nozzles along high-pressure hoses with quick-disconnect connections, high-pressure hoses connected to a manifold made of pipes welded into a closed line, using a quick-connect coupling, which is welded to the collector, from llektora compressed air is supplied by high-pressure sleeves to fogging pneumohydraulic injectors. 5. The device according to claim 4, characterized in that for supplying water fog to the cutting zone of the roadheader in the face, the collector, made of pipes welded into a closed line with fog-forming pneumohydraulic nozzles, is suspended from the roof of the mine in the center of the ventilation pipe axis at a distance not more than 1 m from the end of the ventilation pipe. 6. The device according to claim 4, characterized in that compressed air is used to clean the inner surface of the filter housing pipe and the outer surface of the filter element from contamination. 7. The device according to claim 4, characterized in that the manifold for supplying compressed air is made of pipes welded into an open line and connected to a collector for supplying water made from pipes welded into a closed line.

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