Impact action device

FIELD: mining.

SUBSTANCE: impact action device includes housing provided with an inner bore that receives and allows axial displacement of an impact piston and working tool (spear) arranged coaxially towards said piston. On the top portion of a tool shank there is an annular groove. The lateral surface of said groove mates a limitedly axially displaceable split ring receiving the working tool and at the same time mating the housing surface. Besides, the thickness of said ring is less than the thickness of said groove and its bottom end surface permanently contacts the top end of a rubber-metal shock absorber receiving the working tool. The bottom end of the shock absorber permanently contacts an annular boss formed on the inner side of the housing.

EFFECT: enhancement of reliability, design simplicity and economic feasibility of the device.

2 cl, 5 dwg

 

Device impact refers to the mining, construction, metallurgy and can be used for crushing of oversized, destruction of solid materials, loosening frozen soils in mining, construction, metallurgy and other industries.

The known device impact companies such as Krupp, Rammer, and others, the device according to the Japan patent No. 0236721, as well as devices for A.S. USSR №777211, IPC EV 1/14 and RF patent No. 2182226, IPC IS 37/00. In these devices working tool made in the form of a cylindrical rod having at its shank one or two flats, interacting with fingers, fixed in the housing of the device. This ensures a constant angle relative to its longitudinal axis position and limited movement along the axis. The disadvantage of this solution is to reduce the strength of the tool by reducing the cross-section of the shank of the tool by the presence of faces.

Also known device, as the USSR №1078051, IPC IS 37/00 and A.S. USSR №1079834, IPC IS 37/00, where to limit longitudinal movement of the tool at the end made the annular ledge. With this choice, the strength of the tool is not reduced, but its production requires increased consumption of material, moreover, is complicated by design.

The main disadvantage inherent in semireclined devices, is the lack of elements for damping the residual energy of the tool during attacks on weak material and especially at idle impacts. As a result, the instrument after impact with considerable speed collides with his body. This leads to large dynamic stresses in the tool, in the fingers and body elements, and, ultimately, to failure.

The closest technical solution to the claimed is a device as. the USSR №564415, IPC IS 37/00, selected as a prototype.

The known device comprises a striking mechanism, in the edge of which side of the tool are hydraulic cylinders, the cavity of which channels communicated with the hydraulic system of the device. When interacting in the end of the stroke of the annular protrusion of the tool with cylinders occurs damping of its residual energy.

The disadvantages of the known device should include the complexity and the large diameter of the projection on the shank of the tool, which requires increased material consumption and more complex designs.

Thus, the disadvantages of the known devices are of low reliability, design complexity and increased cost.

The task, which is aimed by the invention is a device percussion, ex the different high reliability, constructive simplicity and efficiency.

To solve the problem the essence of the invention is that in contrast to the known devices percussion, comprising a housing, the inner bore with the possibility of longitudinal movement are piston-drummer and coaxially with it tool (peak), according to the invention on the shank of the tool in its upper part is made annular groove, with the lateral surface of which involves covering the split tool is limited movable along the axis of the ring, while its outer surface conjugate with the surface. The thickness of the said ring is less than the width of the said grooves, and its lower end surface is in constant contact with the upper end of the covering instrument rubber-metal buffer, which its bottom end is in constant contact with the annular protrusion formed on the inner side of the case.

In addition, the cross section of the tool shank in the groove and mating with the surface of the split ring are in the form of a circle or polygon with number of sides three or more (in the limit - circle), and on the outer surface of each of the two halves of the said ring is made of at least one longitudinal groove, the side on top of the spine which are associated with key, fixedly mounted in the housing.

The technical result that can be obtained from the use of the invention is to simplify the construction of the device, increasing its reliability and reducing the cost.

The invention is illustrated by drawings.

Figure 1 shows the structural diagram of the inventive device, percussion; figure 2 shows a section A-a of Fig 1; figure 3 shows a view "B" of figure 1; figure 4 - example of a specific embodiment; figure 5 shows a section A-a figure 4.

The device includes a housing 1, in the internal bore of which, with the possibility of longitudinal displacement posted by piston-drummer 2. In the lower part (in the drawing) of the housing 1 coaxially with the piston-drummer 2 in the guide rails 3 and 4 posted by tool - peak 5.

On the tool shank spades made annular groove 6 having side 7 and two end surfaces 8 and 9. Its side 7 of the surface of the groove 6 is associated with the inner surface of the split ring 10 consists of two half-rings 101and 102while the thickness of the said ring is less than the width of the said grooves 6.

Its outer surface of the split ring 10 is mated with the inner surface of the housing 1. Its upper end surface of the aforementioned split ring 10 rests on the shoulder 11 of the housing 1 and the lower end surface is STU - on rubber-metal buffer 12, which in turn is in contact with the upper end of the guide sleeve 13, mounted stationary in the housing 1 by means of the outer sleeve 14 and the fingers 15.

An example of the apparatus for impact action, in which the surface of the groove 6 of the tool 5 has the shape of a polyhedron, coupled with the similar surface of the split ring 10, as shown in figure 2. The number of faces can be three or more (in the limit - circle).

In addition, in this case on the outer surface of each of the two halves 101and 102the ring 10 is made of longitudinal grooves connected with the pins 16, fixed in the housing 1. This attachment eliminates the rotating tool 5 peaks around its axis during operation. This is necessary if the working part of the tool is made in the form of a wedge or shovels.

The device operates as follows. In the initial position of the lower end of the tool - peaks rests on the surface of the processed material, such as rocks. The lower end surface 9 of the ring groove 6 is in contact with the split ring 10, which rests on the shoulder 11 of the housing 1.

When working stroke (downward movement) of the piston-drummer 2 at the end of its stroke strikes the tool - peak 5. Under the action of the punch tool - peak 5 is moved along the axis down, somnogenic penetrating into the material being processed. The magnitude of this movement (introduction) 1 depends on the strength (strength) of the processed material and usually does not exceed the value of L, is equal to the difference of the width of the annular groove 6 and the ring 10, i.e. L=C-D, where C is the width of the annular groove, and D is the thickness of the split ring. This means that the impact energy is extinguished on the way 1<L.

During operation of the impact device is constantly pressed against destructible material, providing contact the lower end surface 9 of the ring groove 6 to the split ring 10.

If handled too weak material, the impact energy on the way of implementing equal to L, not hitting, and tool - peak 5 after contact of the upper end surface 8 of the annular grooves 6 split ring 10 continues to move down, deforming the rubber-metal buffer 12 and thereby stermaria tool - peak 5. This limits the peak load on the body 1 of the device.

And, finally, a possible case of "pure shot" or idle stroke when the stroke tool - peak 5 does not concern the processed material. In this case, all the impact energy is extinguished due to the deformation of the rubber-metal buffer 12.

The percussion device made according to the invention, has a more durable tool with a minimum consumption of material, and such is the position in the tool and the clamping minimal even at idle impacts ("pure shot"), which improves the reliability of the device, to simplify its operation and reduce the cost.

1. The percussion device, comprising a housing, the inner bore with the possibility of longitudinal movement are piston-drummer and coaxially with it tool (peak), characterized in that the shank of the tool in its upper part is made annular groove, with the lateral surface of which involves covering the split tool is limited movable along the axis of the ring, while its outer surface conjugate with the surface, the thickness of the said ring is less than the width of the said grooves, and its lower end surface is in constant contact with the upper end of the covering instrument rubber-metal buffer, which its bottom end is constantly exposed to annular ledge formed on the inner side of the case.

2. The device according to claim 1, characterized in that the cross-section of the tool shank in the groove and mating with the surface of the split ring are in the form of a circle or polygon with number of sides three or more, and on the outer surface of each of the two halves of the said ring is made of at least one longitudinal groove, the side surfaces of which are associated with key, NEPAD is tenderly fixed in the case.



 

Same patents:

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7 dwg

Pneumatic hammer // 2244828

FIELD: mechanical engineering; jack hammers.

SUBSTANCE: proposed hammer has housing with two working chambers, upper and lower ones, arranged in tandem and divided by bridge with hole. Striker in form of rod with two pistons end ends, upper and lower ones, is installed in chambers. Striker is in contact with shank of working tool. Hammer is provided with air distributor and channels in housing. Channel along which compressed air is supplied to execute idle stroke of striker are laid only to lower part of upper chamber under upper piston. Chamber under lower piston is in constant communication with atmosphere through holes in walls of housing in zone of contact of striker with shank of working tool.

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2 cl, 2 dwg

FIELD: construction.

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EFFECT: higher reliability.

2 dwg

FIELD: mining industry, particularly use of explosive substances based on calcium oxide for developing decorative rock, for safe breaking building structures and objects taken out of service.

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EFFECT: improved quality, increased inner friction of hardening mix, provision of breaking force exceeding 180 MPa and 1.5-2 fold cost reduction in comparison with prior art method using rotary furnaces.

2 cl, 1 tbl

FIELD: mining industry.

SUBSTANCE: device has hollow cylindrical body with radial apertures and ring-shaped shelves at the ends and self-compacting collars. These are mounted on opposite ends of body and are adjacent by bases to its ring-shaped shelves. On the latter barrels are fitted with central apertures in bases. Through barrels and body a pipe is let with possible longitudinal displacement relatively to body, having radial apertures, ring-shaped shelf at one end and outer thread at other end. Pipe is pressurized on the side of ring-shaped shelf, its radial apertures are in zone of radial apertures of body, one barrel is stopped against ring-shaped shelf of pipe, and other barrel is connected to pipe by threaded connection.

EFFECT: higher efficiency.

1 dwg

FIELD: mining industry, particularly devices for drilling and reaming wells in hard rock.

SUBSTANCE: drilling device has drilling tool made as boring rod with rock-cutting members and flame-jet burner installed at end thereof. Device also comprises pipelines for supplying fuel, water and air from discharge compressor outlet to flame-jet burner, as well as compressor with filter arranged at suction pipe inlet. Filter comprises body with condensate-tapper, converging nozzle and deflector. Flame-jet burner is made as a plurality of nozzles. Number of burner nozzles is divisible by 2. Each nozzle has curvilinear grooves extending from inlet orifice to outlet one in longitudinal direction. Curvature of groove generatrix of one nozzle advances in clockwise direction. Curvature of groove generatrix of another nozzle advances in counterclockwise direction.

EFFECT: reduced power inputs due to improved parameters of temperature fields and fields of stresses in well body where high-temperature fuel combustion processes cooperate with rock of complex structure and texture.

3 dwg

Percussion device // 2258138

FIELD: dislodging equipment for cutting rock, artificial frangible materials, for loosening frozen ground and for compacting fill-up soil, particularly replaceable tool adapted to be connected to shovel boom and operative tool of fixed high-strength rock dislodging plant.

SUBSTANCE: device has resilient seals, hydropneumatic accumulator piston movably installed in device body and comprising cylindrical shaft connected to piston end facing hydraulic chamber thereof and mating device body. Cylindrical shaft has annular groove formed in medium part thereof and brings end chamber of distribution means having larger diameter into communication with draining pipeline or with working liquid source through body channels. End chamber having lesser diameter permanently communicates with working liquid source. Rear cavity of working stroke chamber located behind working end of percussion piston communicates with working liquid source or with working stroke chamber through body channels and two check valves.

EFFECT: increased efficiency, simplicity and reliability, reduced cost and size, improved manufacturability, prevention of working fluid flow between working stroke chamber and idle stroke chamber, increased impact frequency with a given pump capacity and impact energy.

2 cl, 1 dwg

FIELD: mining, particularly hand tools or hand-held power-operated tools specially adapted for dislodging minerals.

SUBSTANCE: pneumatic hammer comprises arm with cup, executive tool, body with outlet channel closed with lid from arm side and defining annular prechamber for system air between cup and lid, working and idle stroke chambers, displacement chamber located between lid and larger body step and pressurizing chamber defined by recess with cut-off edges permanently formed on inner side surface of central stepped channel by annular prechamber communicated with compressed air system. Hammer also has inlet throttle channel formed in pressurizing chamber wall, annular neck portion located in central stepped lid channel between pressurizing and displacement chambers, bypass displacing channel having radial outlet formed in the body and communicating with working stroke chamber arranged between pressurizing chamber and outlet channel formed in the body and striker with upper and lower cut-off edges located in central stepped channel along body axis. Distance between the striker edges is greater than distance between displacement chamber outlet and cutoff edge of larger central channel step. Hammer is additionally provided with inlet throttle channel made in the lid and permanently communicated with annular prechamber. Radial bypass displacing channel inlet is formed in the annular neck portion between pressurizing and displacing chambers from displacing chamber side so that distance between cut-off edges of displacing chamber on side central stepped body channel surface is greater than distance between cut-off striker edges.

EFFECT: increased power of hammer stroke.

1 dwg

FIELD: mining, particularly hand tools or hand-held power-operated tools specially adapted for dislodging minerals.

SUBSTANCE: pneumatic hammer has body with radial outlet channel and central channel, lid with annular shoulder and central orifice supported by body end in air-tight manner, striker with through axial channel dividing central body channel into working and idle stroke chambers, tube having blind shoulder arranged from lid side, longitudinal and radial channels. The tube is installed coaxially in central body channel and cooperates with through axial channel of the striker and with central lid orifice by side wall thereof so that annular dap is created between tube and lid. The annular gap may be closed with blind lid shoulder. Hammer has cup, which is air-tightly installed relative annular shoulder and body so that annular accumulation chamber is formed between side cup surface and lid. Annular accumulation chamber is permanently communicated with idle stroke chamber by radial bypass channel in the body. Annular lid shoulder and cup with air inlet channel define prechamber. Air inlet channel permanently communicate prechamber with compressed air system through air hose and nipple releasable connected to the cup. Hammer comprises ring with outlet orifices forming outlet chamber between the body and outlet channel, executive tool with shank and shoulder cooperating with body end and with shank cooperating with hammer, cap with annular shock absorber retaining executive tool from falling out of central body channel. Executive tool shank is provided with central blind hole for receiving tube rested upon bottom thereof. Side surfaces of the tube and central blind hole cooperate to define annular channel having throat, which is not less than that of longitudinal tube channel.

EFFECT: increased operational reliability and power of hammer stroke.

2 dwg

FIELD: mining and building, particularly control methods for hydraulic driven pulse systems, to design hydraulic percussion machines.

SUBSTANCE: method involves permanently connecting return stroke chamber to system comprising liquid source and accumulator; connecting forward stroke chamber alternately to liquid source or to drain means adapted to discharge liquid into vessel through hydraulic distribution means including the first and the second control chambers, wherein forward stroke chamber is connected to liquid source in response to a control signal which controls striker shifting into forward stroke, and forward stroke chamber is connected to drain means in response to a control signal which controls striker shifting into return stroke after striker fixation; exerting permanent additional force upon the second control chamber connected to upper striker location sensor. Above alternate connection between forward stroke chamber and liquid source or drain means is carried out by means of quick-acting valve connected to liquid source, to drain means and to the first chamber of hydraulic distribution means. Above control signals for striker shifting into forward or return strokes are transmitted to quick-acting valve from control unit. Time delays for control signal transmission are set manually or with the use of control unit to provide quick-acting valve shifting relative synchronization moment set by timing sensor in accordance to operation condition sensor signal magnitude.

EFFECT: increased efficiency and operational reliability.

2 cl, 1 dwg

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