Device for supplying irrigating fluid to the cutter mining machine

 

(57) Abstract:

The invention relates to cutters of mining machines. The inventive device for supplying irrigating fluid to the cutter mining machine includes a cutter holder, a cutter with working part and a cylindrical shank, an annular channel for the passage of irrigating fluid, the locking element, the working cavity, the channel for supplying irrigating fluid, the sealing element and the locking device. Tool holder fixed to the body of the Executive body and has a through longitudinal channel. A cutter mounted in the longitudinal channel of the tool holder with the possibility of rotation and limited axial movement. The locking element is located in the annular groove on the rear side of the holder is rigidly connected to the tool holder. The locking device is made in the form of two oppositely directed truncated conical cavities coupled between a cylindrical neck. Sealing element placed freely in a truncated conical working cavity that faces towards the support surface of the valve body and in communication with the channel for supplying irrigating fluid. The working part of the cutter is made in the form of a conical head with continue the acquisition relates to the mining industry, mainly to coal, and can be used for dust control and explosions from frictional sparking, heat cutters and track cutting in the process of mining machines in the sewage tunnel workings, in conditions where a relatively small flow of irrigating fluid if its low pressure.

A device for supplying irrigating fluid to the cutter mining machine (patent USSR N 1819326 A3, class E 21 C 25/38, 35/18, 1993), including a holder, a cutter with a working head and a cylindrical shank, the locking element, the channel for supplying irrigating fluid shut-off device, which is made in the form of an annular sealing element of elastic material and the rings, while the sealing element and the ring is installed in the annular groove of the cutter holder, the locking element is rigidly connected to the tool holder, and a ring located between the locking and sealing elements.

A disadvantage of this device are large leakage of irrigation fluid, as the low pressure of the irrigating fluid is not able to compress the annular sealing element and to block the flow area. In addition, this device does not allow you to use cutters which which exceeds the diameter of the tool holder.

The closest in technical essence is a device for supplying irrigating fluid to the cutter mining machine (patent RF N 2006579 C1, class E 21 C 25/38, 35/22, 1994), including fixed to the body of the Executive body of the tool holder with a longitudinal through channel mounted in the longitudinal through-channel of the tool holder can be rotated around its longitudinal axis and for limited axial movement of the cutter with working part and a cylindrical holder having a tail portion formed by the wall of the longitudinal channel in the holder and the outer lateral surface of the cylindrical holder annular channel for the passage of irrigating fluid, placed in the annular groove on the rear side of the holder and rigidly connected to the tool holder locking element for locking the cutter in a longitudinal end-to-end channel of the tool holder formed in the bearing surface of the valve body and the walls of the longitudinal through-channel of the working cavity located in the housing of the Executive body of the channel for supplying irrigating fluid, the sealing element and the locking device.

A disadvantage of this device, as well as analogue, are large leakage geostatical, the diameter of the conical working head in place mates with a cylindrical holder exceeds the diameter of the tool holder.

The positive effect of the invention is achieved by taking into account these common characteristics are the closest to the technical nature of the device, the locking device is made in the form of two oppositely directed truncated conical cavities coupled between a cylindrical neck with a common longitudinal axis, and a cylindrical neck configured to accommodate a cylindrical tail portion of the shank of the cutter and interaction directed toward the working side of the cutter side wall of the ring groove with a locking element, and a truncated conical cavity facing the support surface of the valve body, performed with the opportunity to freely accommodate a sealing element and interaction is facing towards the shank of the cutter surface of the sealing element with a conical surface of the cavity and is in communication with the channel for supplying irrigating fluid, a working portion of the cutter is made in the form of a conical head with longitudinal channels communicated with the annular channel for ignea longitudinal surface which is associated with the outer lateral surface of the cylindrical holder. The cutter head is made of at least four longitudinal channels. The sealing element is designed in the form of a ball.

The rationale for the positive effect of the invention by using distinctive signs following.

1. The execution of the closure devices in the form of two oppositely directed truncated conical cavities and communicated between a cylindrical neck with a common longitudinal axis, as well as free accommodation of the sealing element in a truncated conical cavity facing the support surface of the valve body allows when there is no load on the cutter securely block the path to the expiration of irrigating fluid.

2. The working portion of the cutter in the form of a conical head high durability with longitudinal channels communicated with the annular channel for the passage of irrigating fluid, will allow you to apply irrigating fluid directly to the sources Pyle and sparking and to ensure reliable pylevzryvozashchite.

3. In a new technical solution to any given topic are needed, and all together are sufficient to achieve a positive effect.

4. In known tehnicheskie diagram of the device in the absence of interaction cutter with rock; in Fig.2 scheme of the closure devices in the absence of interaction cutter with rock (enhanced); Fig.3 scheme of the closure devices in the interaction of the cutter with rock (enhanced); Fig.4 section a-a of Fig.1; Fig.5 sealing element in the form of a ball (an embodiment).

Device for supplying irrigating fluid to the cutter mining machine contains fixed to the body 1 of the Executive body of the tool holder 2 with a longitudinal through channel 3, mounted in the longitudinal through-channel of the tool holder can be rotated around its longitudinal axis and for limited axial movement of the cutter 4 with working part 5 and the cylindrical holder 6, having a tail portion 7 formed by the walls 8 of the longitudinal channel in the holder and the outer side surface 9 of the cylindrical holder ring channel 10 for the passage of irrigating fluid, placed in the annular groove 11 on the rear side of the holder and rigidly connected to the tool holder locking element 12 to lock the cutter in a longitudinal end-to-end channel of the tool holder, formed bearing surface 13 of the valve body and the walls of the longitudinal through-channel of the working cavity 14, raspolojennoe device 17. The locking device is made in the form of two oppositely directed truncated conical cavities 18 and 14, connected between a cylindrical neck 19 with a common longitudinal axis O-O. the Cylindrical neck is arranged to accommodate a cylindrical rear part 7 of the tool holder cutter and interaction directed toward the working side of the cutter side wall 20 of the ring with a locking element 12. A truncated conical cavity 14 facing the support surface 13 of the valve body, performed with the opportunity to freely accommodate a sealing element 16 and the engagement faces of the cutter holder surface 21 of the sealing element with a conical surface 22 of the cavity 14 and is in communication with the channel 15 for supplying irrigating fluid. The working part 5 of the cutter 4 is made in the form of a conical head 23 with the longitudinal channels 24 communicated with the annular channel 10 for the passage of irrigating fluid. The longitudinal channels in the head cutter is made, for example, in the form of grooves, the bottom longitudinal surface 25 which is associated with the outer side surface 9 of the cylindrical holder 6. The cutter head is made of at least four longitudinal channels. Upl is l1less distance l2between the sealing element and the support surface of the housing Executive body and less than the distance l3between the faces of the stopper element 12 of the side wall 26 and the locking element.

Device for supplying irrigating fluid to the cutter mining machine operates as follows.

Irrigating fluid is supplied under pressure through the channel 15 of the housing 1 of the Executive body and enters into the working cavity 14. In the absence of interaction cutter with rock, i.e. when there is no load on the cutter, irrigating fluid pressure on the sealing element 16 and pushes it forward with the cutter until then, until the surface 21 of the sealing element comes into engagement with the conical surface 22 of the working cavity 14. Further displacement of the cutter forward will occur as the compression of the sealing element depending on the magnitude of the pressure of the irrigation fluid and the elastic force of the sealing element to the interaction of the side wall 20 of the annular groove of the tool holder cutter with a locking element 12. The interaction of the sealing element with the wall of the working cavity block the path to the expiration of irrigating fluid to the cutter, ESEC served on the value of l1to interaction of the cutter head 4 with the tool holder 2, by shifting its motion sealing element. The surface 21 of the sealing element 16 moves away from the conical surface 22 of the working cavity 14 and opens the path to the expiration of irrigating fluid from the cavity 14 through the cylindrical neck 19 into the conical cavity 18. Of the conical cavity 18 irrigating fluid enters the annular channel 10 and then through the longitudinal channels 24 of the conical head 23 is fed to the bottom to sources of dust and sparking, accompanying the process of cutting and fracture of rocks. When removing the load on the cutter supply of irrigating fluid to the cutting zone and fracture of rocks ceases. Next, the processes of filing and termination of fluid will rotate depending on whether or not the load on the cutter.

Experimental verification of the operation of the device for supplying irrigating fluid to the cutter mining machine carried out in laboratory conditions. In the trials used standard cutter. When there is no load on the cutter locking device worked at a water pressure of 0.06 MPa in cases where the cutter was in a horizontal position and when giving the ke on the cutter water consumption varied from 1.98 to 7,8 l/min with a change in water pressure at the cutter from 0.02 to 0.5 MPa. For different types of harvesters and conditions the water flow can be reduced or increased by varying the cross-section of the annular channel for the passage of irrigating fluid, i.e., by changing the diameter of the longitudinal channel in the tool holder.

The base object (Guidance on dust control in coal mines. M. Nedra, 1979, S. 38) contains the Executive body established by the Executive body of the holders with the tools, channels for supplying irrigating fluid and unregulated flow of fluid nozzles or sprinklers (nozzles), i.e. always running, regardless of whether there is or there is no load on the cutter. Nozzles and sprinklers have low reliability due to frequent clogging of nozzles whose diameter is 1-2 mm or less. The nozzles takes more than 1 h per shift. Blockage of nozzles nozzles and sprinklers leads to the termination of supply of irrigating fluid into the zone of dust and sparking when breaking rocks. The termination of supply of irrigating fluid leads to high airborne dust in the mine. Moreover, according to the Oriental research Institute for the safe conduct of work in the mining industry, corking 2-3 sprinklers can create a dangerous situation for istwo for supplying irrigating fluid to the cutter mining machine is free from the above drawbacks closest analogue and especially the underlying object. It allows the use of cutters of high resistance, the diameter of the conical working head in place mates with a cylindrical holder exceeds the diameter of the tool holder, and provides a small flow of irrigating fluid if its low pressure by eliminating leaks fluid when there is no load on the cutter. The execution of the closure devices in the form of two oppositely directed truncated conical cavities and communicated between a cylindrical neck with a common longitudinal axis allowed in the work process to eliminate abrasion cylindrical neck walls of truncated conical cavities, especially the working cavity of the cylindrical holder and to maintain the cleanliness of processing not only the conical surface of the cavity, and the sealing element, because it is freely available on the truncated conical working cavity. In addition, the operation of the device at low pressure irrigating fluid will refuse pumping systems and reduce energy costs, since the fluid pressure in the fire protection piping, component according to the Rules of safety in coal and shale mines 0.6 to 1.5 MPa, will be sufficient for normal funkcionirovanie the ptx2">

1. Device for supplying irrigating fluid to the cutter mining machine, comprising fixed to the body of the Executive body of the tool holder with a longitudinal through channel mounted in the longitudinal through-channel of the tool holder can be rotated around its longitudinal axis and for limited axial movement of the cutter with working part and a cylindrical holder having a tail portion formed by the wall of the longitudinal channel in the holder and the outer lateral surface of the cylindrical holder annular channel for the passage of irrigating fluid, placed in the annular groove on the rear side of the holder and rigidly connected to the tool holder locking element for locking the cutter in a longitudinal end-to-end channel of the tool holder, formed in the bearing surface of the valve body and the walls of the longitudinal through-channel of the working cavity located in the housing of the Executive body of the channel for supplying irrigating fluid, the sealing element and the locking device, characterized in that the locking device is made in the form of two oppositely directed truncated conical cavities coupled between a cylindrical neck ical tail holder cutter and interaction directed toward the working side of the cutter side wall of the ring groove with a locking element, and a truncated conical cavity facing the support surface of the valve body, performed with the opportunity to freely accommodate a sealing element and interaction is facing towards the shank of the cutter surface of the sealing element with a conical surface of the cavity and is in communication with the channel for supplying irrigating fluid, a working portion of the cutter is made in the form of a conical head with longitudinal channels communicated with the annular channel for the passage of irrigating fluid.

2. The device under item 1, characterized in that the longitudinal channels in the head cutter is made, for example, in the form of grooves, the lower longitudinal surface of which is associated with the outer lateral surface of the cylindrical holder.

3. The device according to PP. 1 and 2, characterized in that the cutter head is made of at least four longitudinal channels.

4. The device under item 1, characterized in that the sealing element is designed in the form of a ball.

 

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