Pneumatic percussion machine

 

(57) Abstract:

The invention relates to mining and construction. Pneumatic percussion machine contains the barrel, placed in it the drummer, which divides the cavity of the barrel on the camera working and idle strokes, one of which is connected through channel idle with the air-distributing mechanism. To improve the efficiency of the machine controls the mechanism control exhaust made in the form of two-stage valve with the sealing and guide each step placed in the cavities of the housings of the device with the formation of the respective steps of the valve ring cavities management exhaust, manual valves are connected by means of lugs and the ring cavity control emissions associated with exhaust holes, the command channels and command-holes with cameras. 1 Il.

The invention relates to mining and construction.

Known pneumatic percussion machine, containing the barrel channel, pin, spring o-ring valve controlling the exhaust of air from the pneumatic working chambers of the machine, the sleeve [1]

The disadvantages of the known machine actions containing barrel with channels, the drummer, the spools with the separation stops controlling the exhaust of air from the working chambers of the machine, and the sleeve [2]

The disadvantages of the known machines are low efficiency due to wasteful leakage of compressed air from the working chambers of the machine when opening the drummer exhaust hole communicating with the atmosphere through the annular cavity of the control sleeve.

The goal of increasing efficiency, reliability and durability.

The objective is achieved by the fact that the time of the transfer ring valve, placed in the cavity of the control sleeve, since the opening drummer exhaust holes (e.g., at idle) should be lower in order to prevent the reduction of pressure in the working chamber of the machine, caused by the wasteful leakage of compressed air through the throttling gap and the channel of the saddle into the atmosphere.

To eliminate this disadvantage it is necessary that at the moment of opening the drummer exhaust holes at idle and working during the ring valves occupied position. However, this cannot be fully achieved even in the manufacture of the annular valve from ultra-light materials having high mechanical strength.

These drawbacks are eliminated due to the fact that the control mechanism controls the exhaust is made in the form of a two-stage valve with the sealing and guiding steps each, placed in the cavities of the housings of the device with the formation of the respective steps of the valve ring cavities management exhaust.

The invention consists in that in a pneumatic machine percussion, containing the barrel, placed in it the drummer, which divides the cavity of the barrel on the camera working and idle strokes with the air-distributing mechanism mounted on the barrel of the device, in the cavities of the housings of which is placed a control mechanism exhaust chamber of the barrel, the controls of which is formed in the cavities of the housings of the control cavity, made in the stem of the exhaust hole, the command channels and command-hole, which connects the cavity of the control chambers of the barrel, the control mechanism controls the exhaust is made in the form of a two-stage valve with the sealing and guiding steps each, placed in the cavities of the housings of the devices coord is vasani between themselves by means of lugs, and the annular cavity control exhaust are connected, respectively, exhaust holes, command-holes and command channels with cameras shaft, and inputs the command of holes at the command channels of the chambers of the barrel are placed from the exhaust holes, respectively, at a distance not exceeding the height of the piston portion of the striker, and guides the steps of the valve holes.

The drawing shows a pneumatic percussion machine, cut.

Pneumatic percussion machine includes a barrel 1, a working tool 2, the handle 3 in the collection, provided with a device for the inlet of compressed air (not shown), the trigger 4 and channel 5.

In the cavity 6 of the handle 3 posted by air-distributing mechanism, comprising a tubular valve 7, the valve seat 8, provided with channels 9, 10 and 11 for the passage of compressed air, and the cover 12.

The barrel 1, the working cavity which is separated by a drummer on 13 chambers a and B respectively of the working and idle strokes, provided with a channel 14 for supplying a compressed air into the chamber idling B, command channels 15 and 16, the command holes 17, 18 and 19, 20, and the exhaust holes 21 and 22.

On the shaft 1 lasertime 28, porous sound-absorbing liner 29, positioning sleeves 30 and 31, provided with tabs 32, a spring 33 and the sealing rings 34 each.

The housings 24 and 25 respectively provided with cavities 35 and 36, in which is placed a control mechanism exhaust compressed (exhaust) air from the chambers a and B of the barrel 1, comprising respectively the top 37 and bottom 38 manual valves with seal 39 and the guide 40 steps each, with the formation of the respective steps of the valve ring cavities 41 and 42 controls. The valves 37 and 38 are connected by means of lugs 43 and the alignment stage 40 each valve provided with ports 44.

Pneumatic percussion machine operates as follows.

When pressing the trigger 4, the compressed air pressure P through the suction device of the handle 3, channel 5 enters the cavity 6, where through the channel 9 of the valve seat 8, the channels 10, 11 of the valve seat 8 and the channel 14 of the barrel 1, respectively, into the chamber And the working and the camera B idle passages.

The camera And stroke through the exhaust hole 22, the cavity 36, the annular gap between the sealing step 39 of the lower speed valve 38 and the seat 26, the channels 27, the exhaust hole is on air insulated top drummer 13, the bottom shank of the working tool 2. In this regard, the chamber pressure And the stroke will be less than in the chamber B idling. Under the action of aerodynamic forces resulting from the pressure difference between the compressed air in the chambers a and B, the tubular valve 7 air distributing mechanism will move to the idle position (to the right in the drawing), channel 9 seat 8 will be closed and the flow of compressed air into the chamber And stopped.

The compressed air coming from the cavity 6, the channels 10 and 11 of the valve seat 8, the channel 14 of the barrel 1 into the chamber B of idling, the striker 13, will begin to move upwards.

When the upward movement of the striker 13 will open a command-hole 19 and the compressed air from the chamber B through the command channel 16, the command opening 20 will first be received in the annular cavity 42 of the lower control valve 38, and then through the exhaust hole 22, the cavity 36, the holes 44 in the guide part of the valve 38 and the annular gap between the sealing part 39 of the valve 38 and the seat 26, the channels 27, the exhaust holes 28, porous sound-absorbing liner 29 is supplied, respectively, in the annular cavity 41 of the control valve 38 and the atmosphere.

Under the action of compressed air of the lower valve 38 will plumage is moved upward and forms an annular gap between the sealing step 39 and the saddle 26.

When this sealing step 39 of the lower valve 38 will overlap the channels 27 in the saddle 26 and leakage of compressed air into the atmosphere when opening drummer 13 exhaust apertures 22 will not occur.

Upon further movement of the striker 13 up the air from the chamber And the stroke will be let out into the atmosphere through the exhaust hole 21, the cavity 35 of the casing 24, the annular gap between the sealing step 39 of the upper valve 37 and the seat 26, the channels 27, the exhaust holes 28 and the porous sound-absorbing liner 29.

After plugging the exhaust holes 21 of the air from the chamber And the stroke will be let out into the atmosphere through the command-hole 17, the command channel 15, the exhaust hole 21, the cavity 35, the annular gap, the channels 27 and so on

After passage of the striker 13 (piston part height H) of the exhaust holes 21 camera B idling will be communicated with the atmosphere and the pressure of compressed air in it will be heavily reduced, but the camera And stroke after closing command-holes 17 to rise.

When the pressure of compressed air (as the movement of the striker 13 and up) on a tubular valve 7 through the channel 9 of the camera And exceeds the pressure acting on it through the channels 10, 11 and 14 from the chamber B, TREI 6, through the channel 9 of the valve seat 8 air distributing mechanism will begin to flow into the chamber And the stroke and movement of the striker 13 and up will stop. will start cycle of the stroke and movement of the striker 13 and up will stop. Will start cycle of the stroke.

When driving down the striker 13 command opens the hole 17 and the compressed air from the chamber And through the command channel 15, the command opening 18 will first be received in the annular cavity 42 controls the upper valve 37, and then through the exhaust hole 21, the cavity 35, the holes 44 in the guide part of the valve 37 and the annular gap between the sealing part 39 of the valve 37 and the seat 26, the channels 27, the exhaust holes 28, porous sound-absorbing liner 29 is supplied, respectively, in the annular cavity 41 of the control valve 37 and the atmosphere.

Under the action of compressed air to the upper valve 37 will begin to move down, acting through the lugs 43 on the lower valve 38, which together with the upper valve 37 is also moved downward and forms an annular gap between the sealing step 39 and the saddle 26.

When this sealing step 39 top speed valve 37 will block the channels 27 in the saddle 26 and leakage of compressed air into the atmosphere when opening the camera B idling expelled into the atmosphere through the exhaust holes 22, the cavity 36 of the casing 25, the annular gap, etc.

After plugging the exhaust holes 22 of the air from the chamber B will be let out into the atmosphere through the command-hole 19, the command channel 16, and so on

After passage of the striker 13 (piston part height H) of the exhaust holes 22 of the chamber B is communicated with the atmosphere and the pressure of compressed air in it will be heavily reduced, and in the chamber B after stopping command-holes 19 to rise.

When the pressure of compressed air (as the movement of the striker 13 down) on the tubular valve 7 through the channel 14, the channels 11 and 10 from the chamber B exceeds the pressure acting on it through the channel 9 of the camera And he is (tubular valve 7) will come in the idle position (to the right in the drawing).

At the same time the drummer 13 will strike the shank of the working tool 2. Further, the cycle will repeat.

To eliminate unnecessary contamination of the compressed air from the chamber B idling through command-hole 19, the command channel 16 and the exhaust holes 22 in the camera And at idle and from the chamber And through the command-hole 17, the command channel 15 and the exhaust holes 21 into the chamber B when working stroke, bypassing the drummer 13, the height of the piston cha, respectively, between the exhaust holes 21 and command-hole 17 (i.e., always Hh).

The selection of this model has a command channels 15 and 16 almost in the areas of movement of the striker 13 length h can be reduced to very small values of the magnitude of the back pressure which prevents the move, which increases the power and efficiency of the blow.

Anticipating a supply of compressed air from the cavities B and a, respectively, at idle and working strokes of the striker 13, in the annular cavity 42 and 41 of the control valves 38 and 37 are stimulating effect, increasing movement speed manual valves 38 and 37 to the saddle 26.

The total force of compressed air, for example, on the guide 40 and the seal 39 stage valve 38 while reducing the pressure in the annular gap between the sealing step 39 and seat 26 by increasing the air flow rate flowing through the channels 27 of the saddle 26 briefly into the atmosphere, reduces the time of the transfer valve 38 is approximately one order of magnitude in comparison with the prototype.

Aerodynamic axial resistance of the valves 37 and 38 is also achieved through the holes 44 in the guide 40 degrees, which prevents radial CollabNet to reduce their weight, for example, performing the alignment stage 40 of thermoplastic with high mechanical strength and low coefficient of friction, which will reduce the shock load during transfer and friction losses.

PNEUMATIC PERCUSSION MACHINE, containing the barrel, placed in it the drummer, which divides the cavity of the barrel on the camera working and idling, one of which is connected through channel idle with the air-distributing mechanism mounted on the barrel of the device, in the cavities of the housings of which is placed a control mechanism exhaust chamber of the barrel, the controls of which is formed in the cavities of the housings of the control cavity, made in the stem of the exhaust hole, the command channels and command-hole, which connects the cavity of the control chambers of the barrel, characterized in that what controls the mechanism control exhaust made in the form of two-stage valve with the sealing and guiding steps each, placed in the cavities of the housings of the device with the formation of the respective steps of the valve ring cavities management exhaust, with manual valves are connected by means of lugs and the ring cavity control you the AMI of the barrel, moreover, the inputs command of holes at the command channels of the chambers of the barrel are placed from the exhaust holes respectively at a distance not exceeding the height of the piston portion of the striker, and guides the steps of the valve holes.

 

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Downhole air hammer // 2026480

Keyed connection // 2019694

FIELD: process engineering.

SUBSTANCE: invention relates to construction and mining, particularly, air-operated percussion tools. Percussion mechanism comprises cylindrical case with outlets, circular flange with central through bore, working tool with shank and stepped hammer with rod part. Rod with piston part is fitted in circular flange central through bore to stay permanently in thorough axial bore of stepped hammer. Pneumatic buffer has circular chamber. Cylindrical case bushing has the bore for rod part passage to make a circular web no pneumatic buffer circular chamber side that limits the stroke of steeped hammer. Cup with air feed channel is secured relative to cylindrical case. Circular distribution chamber is arranged in cylindrical case bushing while circuit air chamber is located on circular flange side. Idle stroke chamber is arranged on working tool shank retained by spring relative to cylindrical case. Channel-flat on rod piston part side surface features varying geometrical cross-section increasing from piston part side surface on rod side to the piston part end on the side of through axial bore of stepped hammer.

EFFECT: decreased counter pressure of air in idle stroke chamber, higher power of impact and frequency of impacts.

1 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to construction and mining, particularly, air-operated percussion tools. Percussion mechanism comprises cylindrical case with outlets, circular flange with central through bore, working tool with shank and stepped hammer with rod part. Rod with piston part is fitted in circular flange central through bore to stay permanently in thorough axial bore of stepped hammer. Pneumatic buffer has circular chamber. Cylindrical case bushing has the bore for rod part passage to make a circular web no pneumatic buffer circular chamber side that limits the stroke of steeped hammer. Cup with air feed channel is secured relative to cylindrical case. Circular distribution chamber is arranged in cylindrical case bushing. Circuit air chamber is arranged on circular filter side. Idle stroke chamber is arranged on working tool shank retained by spring relative to cylindrical case. Channels-grooves are made on rod piston part side surface to interact with steeped hammer through axial bore. Said channels-grooves feature variable lengths and total area of cross-sections increasing at area from full diametrical section of rod end part to end part end in through axial bore of stepped hammer.

EFFECT: decreased idle stroke chamber air counter pressure, and resistance to hammer stroke, higher power of impact and impact frequency.

2 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to construction and mining, particularly, air-operated percussion tools. Percussion mechanism comprises cylindrical case with outlets, circular flange with central through bore, working tool with shank and stepped hammer with rod part. Rod with piston part is fitted in circular flange central through bore to stay permanently in thorough axial bore of stepped hammer. Pneumatic buffer has circular chamber. Cylindrical case bushing has the bore for rod part passage to make a circular web no pneumatic buffer circular chamber side that limits the stroke of steeped hammer. Cup with air feed channel is secured relative to cylindrical case. Circular distribution chamber is arranged in cylindrical case bushing while circuit air chamber is located on circular flange side. Idle stroke chamber is arranged on working tool shank retained by spring relative to cylindrical case. Channel-groove on rod piston part side surface features varying geometrical cross-section increasing from piston part side surface on rod side to the piston part end on the side of through axial bore of stepped hammer.

EFFECT: decreased counter pressure of air in idle stroke chamber, higher power of impact and frequency of impacts.

1 dwg

FIELD: machine building.

SUBSTANCE: invention relates to building industry and mining, in particular to the pneumatic devices with impact action. The percussion mechanism includes cylindrical casing with inlet channels, ring flange with through central hole, work tool with shank, step striker with stock part, rod with piston part installed in the central hole of the ring flange, piston part is permanently in the through axial hole of the step striker, ring chamber of the pneumatic buffer, bushing of the cylindrical casing with hole for the stock part passage, creating from side of the ring chamber of the pneumatic buffer a ring bridge limiting movement of the step striker, secured relatively to the cylindrical casing of the sleeve with channel for ail feeding, ring distributing chamber in the bushing of the cylindrical casing, chamber of network air from the side of the ring flange, idle stroke chamber at side of the work tool shank, held by the spring relatively to the cylindrical casing. Channel-slot on the side surface of the rod piston part interacting with the through axial hole in the step striker is made helical.

EFFECT: reduced air backpressure in the idle stroke chamber at and of the work stroke, increased impact energy, and frequency of impact of the pneumatic striker.

1 dwg

FIELD: mining.

SUBSTANCE: device for directed drilling of blastholes using the drilling machine by earlier fixed reference point contains the indicator combined with the reference point in the form of the rod which is fitted with the linear goniometric scale graduated by the formula: , where Lα - the segment length corresponding to the size of the angle (α); α - angle size, deg.; b - distance from the drilling machine axis to the reference point; L - length along the axis of the drilling machine from blasthole spudding place on the wellhead plane to the reference point. Besides, the rod is fitted with a clamp, a slider with a stopper, and from the end face with the flat base arranged perpendicularly to the rod.

EFFECT: device has simple design, its use allows to orient the drilling machine in the pre-set direction within minimum time period.

4 dwg

FIELD: construction.

SUBSTANCE: invention relates to construction and mining industry, in particular to pneumatic shock action devices. A percussion mechanism comprises a cylindrical housing with discharge channels, a ring flange with a through central hole, a working tool with a shaft, a step drummer with a stem part, a rod with a piston part installed in the central hole of the ring flange, which is constantly located in the through axial hole of the step drummer, a ring chamber of the pneumatic buffer (stroke), a bushing of the cylindrical housing with a hole for passing of the stem part and the ring neck (formed by the bushing from the side of the ring chamber of the pneumatic buffer - stroke) limiting the size of movement of the step drummer, a barrel with a channel for air intake fixed with reference to the cylindrical housing, a ring distributive chamber in the bushing of the cylindrical housing, a network air chamber from the ring flange side, an idling chamber from the side of the shaft of the working tool held by a spring with reference to the cylindrical housing. Flat channels on the side surface of the piston part of the rod interacting with the through axial hole in the step drummer are implemented with varying lengths with the total area of cross sections increasing from the full diametrical section of the face part of the rod towards the end of the face part installed in the through axial channel of the step drummer. Implementation of the flat channels with varying geometrical sections allows to reduce air counter-pressure in the idling chamber, due to the smaller amount of air the initial stage of intake, through the smaller through passage section of the flat channels that reduces resistance to movement of the step drummer, and also keeps its pre-shock speed to the moment of impact onto the shaft of the working tool, thus increasing the energy of impact and the frequency of impacts of the pneumatic percussion mechanism.

EFFECT: design improvement.

2 dwg

FIELD: construction.

SUBSTANCE: machine comprises a housing and a striker arranged therein, forming the upper chamber and the lower chamber, a vacuum compressor located at the upper part of the housing, connected to the upper chamber and comprising at least one pair of centrifugal compression-vacuum mechanisms mounted oppositely to each other with suction openings connected to the disc and having a common channel through an opening in this disc, which forms chambers above and below the disc in the upper housing part. The chamber above the disc is connected to the atmosphere, and cuts off said upper chamber and the chamber under the disc from the atmosphere. Said centrifugal compression-vacuum mechanisms are electrically connected to a three-position switch electrically connected to the current source, a receiver connected to the upper chamber, a magnetic lock for the striker, installed in the upper chamber, and a working tool. The lower chamber is connected to the atmosphere. The receiver is located in the housing between the upper chamber and the vacuum compressor and is connected to the upper chamber through the openings of the centering disk separating the receiver from the upper chamber, and to the vacuum compressor - through the openings in the mounting disc separating the vacuum compressor from the receiver. The magnetic lock for the striker is connected to a regulator located in the receiver and made with the possibility to change its length.

EFFECT: ensuring the possibility to expand the energy of impacts and the frequency, to avoid pressure losses during the flow-over from the receiver to the upper chamber, to reduce the machine dimensions by width, and to work in hard-to-reach places.

3 cl, 1 dwg

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