Device for reducing the risk of ignition when using sinking machinery of partial cutting

 

(57) Abstract:

The invention relates to mining and can be used to reduce the risk of ignition at work heading machines with nozzles for supplying air and/or water-air mixtures. The objective of the invention is a reliable prevention of the ignition of the gas mixture released from the broken rocks without a substantial increase in cooling water and softening of the soil. Device for reducing the risk of ignition when using sinking machinery of partial cutting contains a nozzle for the discharge of air and/or water-air mixtures. The nozzle is installed on is connected to zarubinym bar of apoderados. At least part of the axes of the nozzles in any position of rotation Zarubova bar covers the corner of the tunneling machine to 45 in the direction of the breast slaughter. Nozzles can be installed in aplodermatinae can be rotated. Soldertail and/or nozzles can be installed with the possibility of rotation depending on the position of the turning bar. Aplodiravali or nozzles can be installed with the possibility of a separate connection. Towards the bottom of the nozzle can cover a horizontal area on both sides zarubinyh heads on the Central nervous system, the ut to cover the corner from the 30oinside and up to 60 outwards, measured from parallel to the longitudinal axis of the tunnel straight through the top of these angles. In addition to pointing to the sole and a horizontally oriented nozzles can be made up to the other face of the nozzle, in which the emitted quantity is less than 33% other nozzles. The air can be thrown with a speed of more than 75% of the speed of sound. The flow of water and air, you can choose 1:250-1:2000 l/min, and water is fed at a higher pressure than the air. The impact velocity of the air jet can be installed over 1.0 m/s 9 C.p. f-crystals, 6 ill.

The invention relates to mining and can be used in devices for reducing the risk of ignition at work heading machines with nozzles for supplying air and/or water-air mixtures.

A device for reducing the risk of ignition when using tunneling machines with nozzles, part of the axis which is oriented on the bare bottom, and the nozzle is installed on is connected to zarubinym bar aplodermatinae can be rotated (application Germany N 3609754, CL E 21 C 35/22, publ. 24.09.78).

The closest known is a device for reducing the risk of Vespula, at least part of the axes of the nozzles are oriented on the bare bottom and directed to lying before the loading device is smitten rock, the nozzle is installed on is connected to zarubinym bar aplodermatinae can be rotated and a separate connection (application Germany N 2635405, CL E 21 C 35/22, publ. 14.12.78).

In continuous operation the cutters wear, which can lead to chipping of the cutting extremely hot parts and their contact on the bottom of the excavation. Breed, hemmed tunneling or mining machine partial cutting, also, at least partially falls on the bottom before being captured by the loading conveyor or loading device. Hot side cutters or steel bodies, as well as pyrite inclusions may contact such repulsed breed possess even so flammable potential that emerging from the surface of the smitten rock methane can be ignited. A substantial increase in the quantity of cooling water, which could subsequently cause a corresponding cooling of the sole, which, however, has the disadvantage that the latter can be softened, for which reliable and accurate movement Ironman or sinking machinery no longer abazovoy mixture, coming out of the smitten rock, without a significant increase in the total amount of cooling water and at the same time ensuring that the soil is unacceptable not softened.

To solve this problem in the device to reduce the danger of fire when using sinking machinery of partial cutting containing a nozzle for the discharge of air and/or water-air mixtures, the nozzle is installed on is connected to zarubinym bar aplodermatinae, at least part of the axes of the nozzles in any position of rotation Zarubova bar covers the angle perpendicular to the unconformity from the 30otowards the breast slaughter. Nozzles can be installed in aplodermatinae can be rotated. Soldertail and/or nozzles can be installed with the possibility of rotation depending on the position of the turning bar. Aplodiravali or nozzles can be installed with the possibility of a separate connection. Towards the bottom of the nozzle can cover a horizontal area on both sides zarubinyh head of the Central angle less than 90omeasured in projection on the sole. Weekend angles when viewed from above the horizontal zone can cover the corner from the 30oinside and up to 60ooutput, measured from the computers is dasve and a horizontally oriented nozzles can be made upward to the chest of the bottom nozzle, have released the number is 33% vol. other nozzles. The air can be thrown with a speed of more than 75% of the speed of sound. The flow of water and air can be selected 1:250-1:2000 l/min, while water is fed at a higher pressure than the air. Aimed directly at the smitten rock nozzle should prevent capable of ignition of the mixture in the zone of the smitten rock. For this purpose, in principle, enough air at a corresponding speed, accent, and can be used water-air mixture, in which the danger of softening soles eliminated by using a small amount of water. These aimed at smitten rock nozzle, as this corresponds to a preferred variant of execution of the device, can be located on the United with a cutting bar aplodermatinae, and nozzle mainly installed in aplodermatinae can be rotated. By turning the nozzle in such aplodermatinae, if necessary together with him, corresponds to the angle of the stress can be accurately set while minimizing the number of hitting the water, so that the danger of ignition can be reliably eliminated. By turning just sublokatorka regardless of the position of rotation of the cutting bar and in particular, regardless of such rotation of the cutting bar up additional irrigated reliably only repulsed the breed, whereby the angle of the stress at which the air or air / water mixture should be thrown on the smitten rock, and thereby also opening number can be significantly reduced.

Weekend angles directed to the sole nozzles cover the angle perpendicular to the unconformity from the 30oin the direction of the tunneling machine to 45otowards the breast slaughter, and such execution even without turning apoderados provides reliable irrigation and the prevention of the danger of ignition is smitten rock in all positions of the lifting of the cutting bar. These angles can be significantly reduced if soldertail and/or nozzles are installed with the possibility of rotation depending on the position of the turning bar.

Towards the bottom of the nozzle can cover a horizontal area on both sides zarubinyh head of the Central angle less than 90omeasured in projection on the sole, thereby reliably eliminated the fire hazard zone, which can chip side cutters or steel bodies or pyrite vclosure on the horizontal zone cover corner from the 30oinside and up to 60ooutput, measured from parallel to the longitudinal axis of the tunneling machine a straight line across the top of these angles.

If the same irrigation should be also the total irrigation in the form of formation of spray mist over the area covered zarubnami instruments, performing predominantly implemented so that, in addition to directed to the sole and a horizontally oriented nozzles provided upward to the chest of the bottom nozzle, in which the emitted quantity is less than 33% other nozzles, and to prevent the danger of fire, quite naturally, the smaller the discard amount.

So when using air to ensure sufficient dilution, it may still be available or out of methane, chiefly so that the air is thrown with a speed of more than 75% of the speed of sound, and the velocity of the air jet stress mainly installed over 1.0 m/s

When using water-air mixtures, it is possible to minimize the consumption of water and reduce the risk of softening the soles to do so that the flow of water and air to choose 1:250-1:2000 l/the example run schematically shown in the drawing, in which Fig. 1,2 and 3 presents zarubei bar in a lowered position with simultaneous image corners spraying individual located on the chopping bar nozzles, and Fig. 4, 5 and 6 is similar to the image when raised Zarubina bar.

In Fig. 1 schematically shows electric or tunneling machine 1 with a cutting bar 3 mounted with the possibility of rotation around the vertical axis 2 of rotation. The rotation of the cutting bar 3 with the cutting head 4 around the vertical axis 2 causes the horizontal rotation of the cutting bar 3, and in addition to such horizontal rotation provides a turn-up around a horizontal axis 5 of rotation. On the front end of the crawler travel gear 6 electric machine mounted loading device 7. On the rear end of the visible discharge end 8 of the transport device 9.

On Zarubina bar 3 are aplodiravali 10, carrying a large number of downward facing nozzles. In Fig. 1 shows three downward facing nozzle with the axis 11. Shaded areas 12 the indicated amount of air or air and water, emitted such nozzles to the surface, and sections 12 at the same time explain raspadinha device 7 and approximately 45oin the direction of the chest 13 slaughter, thanks to smitten rock and the bare face for cutting tools or cutting heads 4 reliably irrigated by air or water-air mixtures.

In Fig. 2 the longitudinal axis of the tunneling machine schematically shown POS. 14. Shows two horizontal zones 15 covered by the nozzles having an axis 11. The nozzle is oriented so that the opening of these streams converge on the longitudinal mid or on the longitudinal middle axis 14 and cover a horizontal area, and the angles, from parallel to the longitudinal middle axis 14 straight towards the middle of the machine, approximately 30oand towards out - maximum 60o.

In Fig. 3 schematically shows a front view in the direction of the arrow III in Fig. 2, and it shows the horizontal distribution of the two jets with axis II. In General, when this is the location of the nozzles and a relatively small throw away the number is reliable irrigation repulsed rocks in front of the electric machine. Selected corners well enough when turning Zarubova bar upward as shown in Fig. 4,5 and 6, reliably irrigate smitten rock without turning apoderados.

As can be seen from the m it is sufficient if both rear nozzles with axis II will be air or water-air mixture, and directed forward of the nozzle will be turned off in order to still ensure the appropriate angle of irrigation smitten rock. Enough, as can be seen from Fig. 6, the decrease in the upturned position, the number of nozzles to which the supplied air or water-air mixture, so that they, nevertheless, reliably cover the desired area.

1. Device for reducing the risk of ignition when using tunneling machines I partial cutting containing a nozzle for the discharge of air and/or water-air mixtures, and the nozzle is installed on is connected to zarubinym bar 3 aplodermatinae 10, characterized in that at least part of the axis II nozzle in any position of rotation Zarubova bar 3 cover angle perpendicular to the unconformity from the 30oin the direction of the tunneling machine I to 45otowards the breast slaughter.

2. The device under item 1 or 2, characterized in that the nozzle is installed in aplodermatinae can be rotated.

3. The device according to p. 2, characterized in that soldertail and/or nozzles are installed with the possibility of rotation depending on the position of the rotation is with the possibility of a separate connection.

5. Device according to one of paragraphs.1 to 4, characterized in that towards the bottom of the nozzle cover a horizontal area on both sides zarubinyh head of the Central angle less than 90omeasured in projection on the soles.

6. The device under item 5, characterized in that the output angles when viewed from above the horizontal zone cover corner from the 30oinside and up to 60ooutput, measured from parallel to the longitudinal axis of the tunneling machine a straight line across the top of these angles.

7. Device according to one of paragraphs.1 - 6, characterized in that in addition to directed to the sole and a horizontally oriented nozzles made upward to the chest of the bottom nozzle, in which the emitted quantity is less than 33% other nozzles.

8. Device according to one of paragraphs.1 to 7, characterized in that the air is thrown with a speed of more than 75% of the speed of sound.

9. Device according to one of paragraphs.1 to 8, characterized in that the flow of water and air is selected 1 : 250 - 1 : 2000 l/min, and water is fed at a higher pressure than the air.

10. Device according to one of paragraphs.1 to 8, characterized in that the speed of the air jet stress mainly installed over 1.0 m/s

 

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