Pneumatic percussion machine

 

The invention relates to the mining industry and construction, in particular for pneumatic machines percussion. The machine includes a barrel placed in the cavity of the barrel drummer, camera work and idling drummer, the air-distributing mechanism, a tubular valve cover, mounted on the shaft sleeve, the cavity of which is the control mechanism exhaust compressed air into the atmosphere from the cells of the trunk, including the annular valve seat with exhaust openings and movable stops made in the stem of the exhaust hole and command channels. The air-distributing mechanism provided with additional cavities therein, respectively stepped valve and non-return valve, which is, for example, a spring-loaded ball, interconnected top ring groove in the lid of the air distributing mechanism. Part of the cavity under a stepped valve communicated with the cavity of the handle, in which is placed the air-distributing mechanism, and the camera is idle, and part of the cavity above the stepped valve communicated with cameras idle and the stroke of the striker. The annular valve mechanism control exhaust installed helpname holes. The invention provides increased efficiency, reduction of aerodynamic noise. 1 C. p. F.-ly, 4 Il.

The invention relates to the mining industry and construction, in particular for pneumatic machines percussion.

Known pneumatic percussion machine, comprising a barrel, inside which moves the hammer under the action of compressed air supplied from the supply line into the working cavity through the air-distributing device located inside the barrel vozduhoprovodyaschih and command channels, disc with a groove, vozduhovyvodyaschie channel and exhaust openings, and the valve is located in vozduhovyvodyaschie channel, and between the command channels are exhaust holes (1).

The disadvantages of the known pneumatic machines are:

- unproductive consumption of compressed air due to wear of the sealing surfaces of the spools with the groove;

- high aerodynamic noise.

Known pneumatic percussion machine, comprising a barrel, inside which moves the hammer under the action of compressed air supplied from the supply line into the working cavity through the air-distributing device channel and exhaust openings, the valve is located in vozduhovyvodyaschie channel, and between the command channels are exhaust openings, the valve of the air guidance device mounted on the rod and connected by him with elastic elements, which are mounted in the housing of the air-distributing device, the elastic elements are the diaphragm and the spring, which is installed on the valve stem, the stem is made Luggage, which placed additional spring-loaded valve disc, when this part of the chamber above the valve communicated with the rear cavity of the machine and the camera, which is formed by housing the air-distributing device and the membrane, and the other part of the chamber below the valve communicated with the front cavity of the machine (2).

The disadvantages of the known pneumatic machines are;

- unproductive consumption of compressed air, due to wear of the sealing surfaces of the spools with the groove;

- the complexity of the manufacturing elements of the air distributing mechanism.

Closest to the technical essence is a pneumatic percussion machine, containing the barrel, placed in it the drummer, which divides the cavity of the barrel on the camera working and idling, the last of which is mmole sleeve, in the cavity where the control mechanism exhaust from the working chambers, the controls of which is formed with a cavity liner cavity control executed in the trunk of the exhaust hole and command channels, one of which connects the cavity to control the exhaust at idle drummer with the camera of the stroke, and the control mechanism controls the exhaust is made in the form of two annular valve placed in the cavities of the sleeve with the formation of annular cavities control the exhaust, with the annular valve interconnected by means of rods and the annular cavity control exhaust when working stroke of the striker connected with the channel idle through the command channel, the command channel connecting the chamber of the stroke with the annular cavity control exhaust at idle drummer, placed from the exhaust hole camera idling at a distance not exceeding the height of the piston part of the striker (3).

Known pneumatic percussion machine adopted for the prototype.

The disadvantages of the known pneumatic machines are:

- increased consumption of compressed air;

- high aerodynamic noise.

The task restaurany task is achieved, what features pneumatic percussion machine containing barrel placed in the cavity of the barrel drummer, which divides the cavity of the barrel at the chamber of variable volume working and idling drummer, the latter of which is connected by a channel in the barrel with the air-distributing mechanism comprising a saddle with intake ports, a tubular valve cover, mounted on the shaft sleeve, the cavity of which is the control mechanism exhaust compressed air into the atmosphere from the cells of the trunk, including the annular valve seat with exhaust openings and movable stops made in the stem of the exhaust hole and command channels, while the air-distributing mechanism provided with additional cavities therein, respectively stepped valve and non-return valve, which is, for example, a spring-loaded ball, interconnected top ring groove in the lid of the air-distributing mechanism, and a portion of the cavity beneath the stepped valve through the inlet opening in the saddle air distributing mechanism and the channel in the shaft communicates with the cavity of the handle, in which is placed the air-distributing mechanism, and a bachelors of mechanism, the cavity of the valve, the command channel command and the hole is alternately communicated with cameras idle and stroke cavity of the barrel, with team hole is located between the exhaust hole of the barrel, and an annular valve mechanism to control the exhaust of compressed air to interact with movable stops, preventing their rotation, provided with exhaust holes and exhaust holes of the seat control mechanism exhaust of compressed air is placed between the exhaust holes of the ring valve and manual valve air distributing mechanism provided with drainage channels.

In Fig.1 shows a pneumatic percussion machine of Fig.2 section a-a in Fig.1; Fig.3 the node In Fig.1; Fig.4 - section C-C in Fig.2.

Pneumatic machine includes a barrel 1, a working tool 2, the handle 3 with the trigger 4, provided with a channel 5, the cavity 6 and a device for the inlet of compressed air into the pneumatic machine (Fig.1 is not shown).

In the cavity 6 of the handle 3 posted by air-distributing mechanism, comprising a tubular valve 7, the cover 8 with the annular groove 9, the saddle 10, provided with a cavity 11, placed in her speed spool 12, is equipped with usname holes 17 and 18 for the passage of compressed air into the working cavity of the barrel 1 (see Fig.4). The check valve prevents leakage of compressed air from the cavity 11.

The working cavity of the barrel 1 are separated by a drummer 19 on the camera variable displacement E of the stroke and the chamber of variable volume F idling drummer 19. The barrel 1 provided with a channel 20 for supplying a compressed air into the chamber F, the command channel 21, the command opening 22 and the exhaust holes 23 and 24.

The barrel 1 is fixed to the sleeve 25 in the cavity where the control mechanism exhaust compressed air from the chambers E and F in the atmosphere, including the saddle 26, provided with exhaust holes 27 and movable lugs 28, the cavity 29 and 30, and an absorbent liner 31.

In the cavities 29 and 30 connected through the exhaust holes 23 and 24 with the chambers F and E, is placed a ring valves 32 and 33, provided with exhaust holes 34 (see Fig. 2 and 3).

Ring valves 32 and 33 mounted on the movable rod 28 so that the axis of the exhaust hole 34 is displaced relative to the axis of the exhaust hole 27 of the saddle 26 to the Central angle0=/2 (wherethe Central angle between the axes of the exhaust holes of the valves 32 and 33 and the saddle 26), forming a labyrinth for the passage of compressed air.

Pneumatic is istwo and channel 5 enters the cavity 6 of the arm 3, where through the gap between the end of the tubular valve 7 and the cover 8, the gap between the seat 10 and the inner surface of the tubular valve 7, the inlet openings 17 and 18 respectively supplied into the chamber E and the cavity 11 speed spool 12.

To access the compressed air in the chamber F through the inlet 18, the cavity 11 and the channel 20 prevents the stepped spool 12 in communication with the tubular valve 7 from the inlet 18 aerodynamically balanced.

Because the chamber E through the exhaust hole 23, the cavity 29, the holes 34 of the ring valve 32, the gap between the end surfaces of the valve 32 and the seat 26, the holes 27 of the saddle 26 and the porous sound-absorbing liner 31 is communicated with the atmosphere, a tubular valve 7 from the inlet 17 of the saddle 10 aerodynamically unbalanced.

The pressure of compressed air in the gap between the seat 10 and the inner surface of the tubular valve 7 from the inlet 18 is higher than that of the inlet openings 17 (see above), and a tubular valve 7 moves to the left in the drawing (see Fig.1 and 4). While the inlet opening 17 will be closed and the flow of compressed air into the chamber E will stop.

The valve 12 due to the differential cross sections of the steps under dnatm the spool 12 compressed air pressure on the latter will increase to maximum and it will move to its extreme upper position (all the way to the cap 8), fully opening the inlet opening 18, and the compressed air on channel 20 will flow into the chamber F. Under the action of compressed air drummer 19 will begin to move upwards. When the upward movement of the striker 19 first opens the exhaust hole 23 and the air from the chamber F will be received in the cavity 29 of the sleeve 25. The dynamic pressure of the flow of air into the cavity 29 with greater intensity due to the corresponding relative positions of the exhaust hole 27 of the saddle 26 and the exhaust hole 34 of the valve 32 acts on the latter, moving it up until it stops at the end of the seat 26, thus preventing the release of compressed air from the chamber F into the atmosphere.

Simultaneously with the valve 32 by moving the stops 28 moves up and annular valve 33, communicating with the chamber E through the exhaust hole 24, the cavity 30, the holes 34 of the valve 33, the gap between the end surfaces of the seat 26 and the valve 33, the holes 27 of the saddle 26 and the liner 31 with the atmosphere.

Upon further upward movement of the striker 19 will block the exhaust port 24 and will open a command-hole 22 and the compressed air from the chamber F through the command channel 21 acts on the ball 15 check valve, overcoming the resistance of spring 16 and moves it upwards.

Next stupenchaty the spool 12. Filling the cavity 11 with compressed air will be up until the pressure therein equal to the current pressure of compressed air in the chamber F. then the ball 15 check valve will cut off the cavity 11 from the chamber F, as the current pressure therein during movement of the striker 19 up will be reduced.

Because aerodynamic losses within the air flow channel 20, the chamber F, and so on (see above) are very high pressure in the cavity 11 speed spool 12 will be more and it will remain in the same position.

After the opening of the exhaust hole 24 F will be communicated with the atmosphere (see above) and the pressure in it and the channel 20 will be dramatically reduced, while in the chamber E to rise.

Due to the large length of the channel 20, the intensity of the lower air pressure is significantly lower than in the chamber F. as soon As the air pressure in the cavity 11 speed spool 12 will be below the pressure locked volume over speed valve 12, the latter will move down until it stops at the end of the channel 20 and the admission of compressed air into the chamber F will stop. The pressure of the air in the channel 20 and the chamber F will be close to atmospheric, and the pressure in the gap between the seat 10 and the inner surface of the tubular valve 7 SRA 18 dynamically balanced.

The pressure of compressed air in the chamber E, generated by a moving up in drummer 19, a tubular valve 7 from the inlet 17 will move it to the right in the drawing (see Fig.1) and network air from the cavity 6 of the arm 3 will flow into the chamber E. the Process of moving the tubular valve is performed in this case is much faster than in pneumatic machines with the traditional distribution system, which reduces wasteful leakage of compressed air at idle drummer. Under the action of compressed air, the movement of the striker 19 up will stop and it will start to move down.

At the time of changing the direction of movement of the striker 19 idle (see above) on the working stroke, the compressed air from the cavity 11 over speed valve 12 and the air migrating from the cavity 6 through leaks between the seat 10 and the inner surface of the tubular valve 7 into the cavity 11 under a stepped spool 12, is removed through the drain grooves 13 of the stepped spool 12, the channel 20 of the cavity F, etc. in the atmosphere.

In this regard, the cavity 11 speed spool 12 is stored pressure close to atmospheric, and the tubular valve 7 to the beginning of the working stroke of the striker 19 will be sustainable at Pervomaiskoe from the location of the ring valves 32 and 33 during operation of the pneumatic machine) into the atmosphere.

After plugging the exhaust holes 24 and 23, the drummer of the air in the chamber F will begin to shrink. Upon further downward movement of the striker 19 will open the exhaust port 24 and the compressed air from the chamber E will begin to flow into the cavity 30 of the sleeve 25.

Under the action of the dynamic pressure of the flow of air into the cavity 30, the valve 33 will press tightly to the side of the seat 26, preventing release of compressed air from the chamber E into the atmosphere through the exhaust hole 34 of the valve 33, the holes 27 of the saddle 26 and the liner 31. Thus the air in the chamber F will continue to shrink.

After drummer 19 during its downward movement will provide a command-hole 22 and the compressed air from the chamber E at command channel 21, the cavity 14 and the annular groove 9 of the cover 8 is fed into the cavity 11 over speed valve 12 (see above).

Under the pressure of compressed air speed of the spool 12 is firmly pressed against the end face of the channel 20 and stops the migration of compressed air from the cavity 11 speed spool 12 through the channel 20 into the chamber F.

The simultaneous admission of compressed air from the cavity 11 over the speed drummer 12 through its drainage grooves 13 in the cavity 11 speed spool 12 accelerates the process of pressure equalization with network pressure the valve 7 from the inlet 17 at this point will be below than in the cavity 11 speed spool 12 (see above), a tubular valve 7 moves to the left in the drawing (see Fig.1) and network admission of air into the chamber E will cease until the drummer 19 during its downward movement will open the exhaust hole 23 and will inform the chamber E with the atmosphere.

Thus, when the opening of the exhaust hole 23 emptying of chamber E into the atmosphere will occur without receipt in her network of air from the cavity 6, which is almost an order of magnitude reduces the time operaniuni and leads to a drastic reduction of unproductive losses of the network of air and aerodynamic noise. After opening the drummer 19 exhaust hole 23, the compressed air from the chamber E is discharged into the atmosphere.

At the end of the process operaniuni camera E compressed drummer 19, during its movement down the air in the chamber F through the channel 20 and the network air in the cavity 6 of the handle 3 at the same time affect the speed of the spool 12 from the bottom, moving it up until it stops in the cover 8, overcoming the residual pressure of the compressed air in the cavity 11 above the stepped spool 12. Network air from the cavity 6 through the inlet 18, the cavity 11, the channel 20 will flow into the chamber F. At this point the drummer 19 will strike the shank of the working and the Shem, the cycle will repeat.

SOURCES of INFORMATION TAKEN INTO CONSIDERATION

1. A. c. No. 456897, Ál. E 21 3/24, etc. 31.05.72.

2. A. c. No. 750055, Ál3. E 21 3/24, etc. 15.08.77.

3. A. c. No. I760I04, Ál5E 21 3/24 other 24.08.90, prototype.

Claims

1. Pneumatic percussion machine containing barrel placed in the cavity of the barrel drummer, which divides the cavity of the barrel at the chamber of variable volume working and idling drummer, the latter of which is connected by a channel in the barrel with the air-distributing mechanism comprising a saddle with intake ports, a tubular valve cover, mounted on the shaft sleeve, the cavity of which is the control mechanism exhaust compressed air into the atmosphere from the cells of the trunk, including the annular valve seat with exhaust openings and movable stops made in the stem of the exhaust hole and command channels, characterized in that that the air-distributing mechanism provided with additional cavities therein, respectively stepped valve and non-return valve, which is, for example, a spring-loaded ball, interconnected top ring groove in the lid of the air-distributing mechanism, and an hour and a channel in the shaft communicates with the cavity of the handle, hosts the air-distributing mechanism, and the camera is idle, and part of the cavity above the stepped spool through an annular groove in the lid of the air-distributing mechanism, the cavity of the valve, the command channel command and the hole is alternately communicated with cameras idle and stroke cavity of the barrel, with team hole is located between the exhaust hole of the barrel, and an annular valve mechanism to control the exhaust of compressed air mounted for cooperation with movable stops, preventing their rotation, and provided with exhaust holes and exhaust holes of the seat control mechanism exhaust of compressed air is placed between the exhaust holes of the ring valve.

2. Pneumatic machine under item 1, characterized in that the speed of the air distributing valve mechanism provided with drainage channels.

 

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