Device of pressure water supply into irrigation systems

FIELD: mechanics.

SUBSTANCE: device of pressure water supply to irrigation systems arranged on sections of shield mechanised support for underground mines, includes at least one system of plough or combine working element route irrigation in longwall, and at least one system for irrigation of worked space, upper ceiling and/or side mine with central water line for supply of spray nozzles of irrigation systems and switching valves. At the same time all switching valves for irrigation systems are installed in a single irrigation valve box, which is equipped with connection for water line and is arranged on section of shield mechanised support in the form of unit separated from hydraulic valve box.

EFFECT: improved operational safety of device for water supply into irrigation system.

8 cl, 4 dwg

 

The invention relates to a device for supplying pressurized water to the irrigation systems, located in sections mechanized shield roof support in underground mining, with at least one of the first irrigation system for irrigation of the path of the plow or the working body of the harvester in the face and at least one other irrigation system for irrigation of a goaf, upper floors and/or flanks production, as well as with the Central water line to supply spray irrigation systems and located in the valve box diverter valve for each irrigation system when enabling or disabling of various irrigation systems.

As used in underground mining sections of the shield powered roof supports for suppression occurs when the notch, such as coal, mining unit, in particular a plow or screw, or drum machine, harmful to human health coal dust has long been known the use of spray nozzles through which the front wastewater treatment works shortly before the passage of the mining unit irrigated with artesian water. For irrigation of the path of the plow or the working body of the harvester in the lava in most cases, each panel section has at least one spray nozzle for proper irrigation system path, and the La switching on and off of these injectors in the hydraulic valve box section mechanized shield lining provides a switching valve. Valve include, depending on the provisions of the mining unit through the control unit for the partition panel of powered roof supports in order to enforce or terminate the function of irrigation.

From the corresponding subject of the invention DE 19537448 A1 it is known that in addition to the irrigation system for the path of the plow or the working body of the harvester in the lava section mechanized shield lining install the irrigation system to hydrate the upper floors, as well as wetting-out space. As water under high pressure in the first place it is necessary to supply only the irrigation path between the Central high-pressure water line and the diverter valve, at least for some of the irrigation systems, installed pressure reducing valves through which the water pressure in the water supply lines can be reduced, often with 150-200 bar to the low pressure level of about 10-40 bar. Activated by the pressure of the same system working environment, and that all other valves, diverter valves for hydroptimale managed in a Central hydraulic valve box. To start hydroptimale and for switching the switching valves in this case, use the appropriate emulsion as, for example, trudnovosplamenjaemy working W is dcost (HFA), which through a separate hydroline is supplied to all sections mechanized shield roof support in underground mining face (the face).

Further, the prior art it is known that the control switch valve for the irrigation system is associated with certain features of the service sections of powered roof supports. Thus, in DE 3802992 C2 described, for example, a valve device for irrigation, in which the spray nozzle is automatically activated during the process of advancing the shield section of powered roof supports.

The objective of the invention is to underground sections of the shield mechanized roof supports to improve the operational safety of the device for supplying pressurized water to the sprinkler system.

This task according to the invention is solved by the fact that all valves for irrigation systems located within the same irrigation valve box, which is equipped with a connection for a water supply line and arranged to location or is located on a section of the shield of powered roof supports in the form of a separate hydraulic valve box unit. Corresponding to the invention the solution in its main idea is based on a complete separation of the liquid paths of irrigation water, on the one hand, and harmful for the environment and for human health of the working liquid is, on the other hand. At the same time provided according to the invention, the irrigation valve box creates conditions for each irrigation system on the partition panel of powered roof supports can be positioned separately managed switching valve without increasing the design space or cost of a hydraulic valve box. According to the invention, the changeover valves for each irrigation system is situated in an additional, separate irrigation valve box, and this irrigation valve box spatially separated from the hydraulic valve boxes.

According to a particularly preferred variant implementation of the change-over valves in the irrigation valve box is configured to control activation of the pressure and managed by the water pressure from the water line due to a change in pressure. Used to control the switching of the valves of the irrigation water applied at this level mainly in the filtered state. The use of irrigation water to control the diverter valve has, firstly, the advantage that in the irrigation valve box should not be, there is no connection for hydraulic fluid. Another advantage is that the pressure of the irrigation in the water in a water supply line, of 150 bar, considerably lower than the pressure of the hydraulic medium, a component usually about 300 bar, so that, in General, as the change-over valves and control valves in the valve box, and there are seals loaded to a lesser extent.

According to another preferred variant implementation of the change-over valves can be designed as 2/2-way valves, which in the first position connects the water supply line with a proper system of irrigation, and in the second position, disconnect the appropriate irrigation system from the water supply line. For activated control pressure switching valves each switching valve in the irrigation valve box electrically connected with, in particular, solenoid driven valve. Further, in the irrigation valve box preferably can be located four switching valve and four control valve, so that in total control and switch separately from each other four irrigation system. Control valves can be performed preferably by a 3/2-way valve, which in the first position connects the control line to the respective change-over valve with the release of flowing water in an irrigation valve box, and in the second position to activate per localseo valve connects the water supply line from the control line. As for managed pressure enable switching valve is used for irrigation water, which is at the closing of the switching valve in the control line irrigation water can drain through the line for flowing water, and eliminates harmful to the environment pollution of the material in the lava.

Further, the switching valve is preferably located in the receiving elements in the irrigation valve box, which are perpendicular to the receiving elements for the control valves. In addition, if one of the irrigation systems must be supplied with only slight water pressure in the irrigation valve box may be provided at least one pressure reducing device. Further, in the irrigation valve box can also be installed filtering device to filter the irrigation water used to control the diverter valve.

The invention relates also to the shield section of powered roof supports with the base section, through the fence, upper floors and their supporting racks that are attached spray nozzle of appropriate irrigation systems and hydraulic valve box and provided according to the invention, the irrigation valve box. Orositel the I valve box provided with preferably some or all of the above functions.

Other advantages and constructive variants of the invention ensue from the following description, schematically shown in the drawings exemplary embodiment. In the drawings shown:

Figure 1 is a schematically section shield of powered roof supports on the side view presented in an enlarged scale irrigation valve box;

Figure 2 - graphic separation of the hydraulic circuit of the environment and the water circuit;

Figure 3 schematically irrigation valve box on the side view and

Figure 4 is based on the simplified circuit of the switching control of the switching valves in the irrigation valve box.

Shown schematically in figure 1 panel 1 panel powered roof supports for maintaining the lava to get to the front of the treatment works, such as coal, by means not shown of the mining unit, such as a coal plough or screw, or drum machine has, as is known to the expert in the field of mining, two section base 2, dammed the fence 3, schematically denoted by a lever articulated chetyrehzvennoy 4, at least one of the upper overlapping 5, and two hydraulically given 6 hours to maintain the top of the slab 5. On facing the bottom face of the top slab 5 has two spray nozzles 7 system 8 on which osenia for irrigation path of a plane or screw, or drum Shearer and two spray nozzles 9 for the irrigation system 10 of the upper floor. On the dam fence 3 has multiple spray nozzles 11 system 12 irrigation goaf, and, in addition, on the side of installed spray nozzles 13 system 14 slot or lateral irrigation. Each of the systems 8, 10, 12 and 14 irrigation is connected through a separate feed line 15, 16, 17, 18 to their own connection W1, W2, W3 or W4 consumers in the irrigation valve box 20, with each connection W1-W4 consumers in the irrigation valve box 20, as will be discussed later, is associated with its own driven by the pressure switching valve 21, 22, 23, 24. In addition, in the valve box 20, there is shown schematically in figure 1, the connection 25 of the water for the Central water supply line 19, the supply of irrigation water under high pressure, for example 150 bar, and the hole 26 for flowing water.

Valve box 20 forms a self-contained unit that can be mounted and fixed separately, preferably even spatially separately from the hydraulic valve box 40, section 1 shield powered roof supports. Therefore, in figure 2 a schematic picture is shown as containing four switching valves 21-24 irrigation the valve box 20 is attached by means of respective supply 15-18 systems 8, 10, 12 or 14 irrigation, and a separate hydraulic valve box 40, in this case, only eight of the hydraulic change-over valve 41 to control various hydroptimale, such as stand in the shield section of powered roof supports, corrective cylinder upper floors, the plunger of the hydraulic cylinder, shifting, etc. Schematic representation in figure 2 clarifies that the irrigation valve box 20 is connected exclusively to the water supply line 19, while the hydraulic valve box 40 through hydroline 42 is fed to the hydraulic working fluid (for example, NFA emulsion). Exclusively electrically irrigation valve boxes 20 and hydraulic valve box 40 through a common electronic control device 45 which by means of schematically indicated electrical control lines 46 and 47 are connected with an electric actuating elements of the change-over valves in valve boxes 20 and 40 respectively.

Located in the irrigation valve box 20 valves 21-24 electrically controlled directly, but it is controlled by the pressure change is shown in figure 4 through the four control valves 31, 32, 33 or 34, each of which is associated respectively the one of the switching valves 21, 22, 23, 24. Therefore, irrigation valve box 20 is made integral with the first receiving unit 27 for switching valves 21-24 and other box-shaped unit 28 for the control valves 31-34, and their electrically driven actuators, such as solenoids. The adoptive elements for switching valves 22, 24 and the receiving elements for the control valves, as particularly shown in figure 3, are oriented perpendicular to each other.

Next, from the chart in figure 4 clearly shows that the change-over valves 21-24 designed as a 2/2-way valve from returning to its original position by the spring bolt. Shown in the figure 4 position valves 21-24 cut off the water supply line 19 from connections W1-W4 consumers; when the change in position of the change-over valve connection W1-W4 consumers connect to connect the irrigation system to the water line 19. Management managed pressure switching valves 21-24 carried the water for irrigation and the water pressure from the water supply line 19, which respectively control valve 31 through a designated stroke control lines 35, 36, 37 or 38 include front gate of the respective switching valves 21-24. In the case of control valves 31-34 it is, as a rule, the 3/2-way valve is, which the water supply line 19 and thus there are pre-filtered irrigation water is directed into the control line 35 to 38 for the corresponding valve 21-24 only when driven electric actuating element or the corresponding electromagnet of the control valve 31 to 34, so that the shutter of this control valve 31 to 34 from the position shown, in which the control line 35 is connected to the connection for the leaking water is shifted to another position, in which the water supply line 19 is connected to the corresponding control lines 35-38. As soon as the control valve 31 to 34 is returned to its original position, located in the corresponding control lines 35-38 water can drain connection 26 for flowing water, and the switching valve 21-24 under the action of the restoring force of the spring is returned to the closed position.

For professionals from the above description, followed by the numerous modifications which will fall within the scope of protection of the dependent claims. Of course, that irrigation valve box may also have other switching valves for the additional functions of the irrigation section of the shield of powered roof supports. Preferably the irrigation valve box and the hydraulic valve to obca mounted on the partition panel of powered roof supports with spatial separation from one another. For the separation between the paths of the two liquid media enough, however, made as a separate unit irrigation valve box to prefential, for example, to the side of the hydraulic valve box, as in this case, there arises the danger that fluid from one circuit may be in a different path.

1. The device for supplying pressurized water to the irrigation systems located on the shield sections of powered roof supports for underground mining, with at least one system (8) irrigation for irrigation path of the plow or the working body of the harvester in the face and at least one other system (10; 12; 14) irrigation for irrigation goaf, upper floors and/or production side, with a Central water supply line (19) to supply spray nozzles (7, 9, 11, 13) systems (8; 10; 12; 14) irrigation and located in the valve box diverter valve for each system (8; 10; 12; 14) irrigation, characterized in that all the switching valves (21, 22, 23, 24) for systems (8; 10; 12; 14) irrigation are hosted on the same irrigation valve box (20), which is equipped with a connection (25) for water supply lines (19) and made with the possibility of location or is located on a section of the shield of powered roof supports in the form of a separate hydraulic valve boxes (40) block.

p> 2. The device according to claim 1, characterized in that the switching valve (21, 22, 23, 24) is arranged to control the pressure and managed by the water pressure from the water supply line (19).

3. The device according to claim 1 or 2, characterized in that the switching valve (21, 22, 23, 24) is a 2/2-way valve, which in the first position connects the water supply line (19) with the corresponding system (8; 10; 12; 14) irrigation, and in the second position, disconnect the appropriate system (8; 10; 12; 14) irrigation from a water supply line (19).

4. The device according to claim 1, characterized in that each switching valve (21, 22, 23, 24) associated with the established in the irrigation valve box (20) electrically driven control valve(31, 32, 33, 34).

5. The device according to claim 4, characterized in that the irrigation valve box (20) has four switching valve (21-24) and four control valve (31-34).

6. The device according to claim 4, characterized in that the control valves (31-34) is a 3/2-way valve, which in the first position connects the control line (35-38) for the corresponding switching valve (21-24) with the release of (26) for flowing water in an irrigation valve box (20)and the second position connecting the water supply line (19) with the control line(35, 36, 37, 38).

7. The device according to claim 4 or 6, characterized in that the switching is e valves are located in the receiving elements in the irrigation valve box which is oriented perpendicularly to the receiving elements for the control valves.

8. The device according to claim 1, characterized in that in the valve box installed, at least one pressure reducing device and/or one filtering device for irrigation water.
Priority items: 01.12.2005 according to claims 1-8.



 

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