SU610937A1 - Percussive-action device for making holes in soil - Google Patents

Description

The invention relates to construction technology. The device can be used when laying underground communications.

Known pneumatically: devices

percussion effect for the formation of wells in the ground, consisting of a housing with grooves and a stepped drummer with channels G. The drummer performs reciprocating movements under the action of compressed air.

The disadvantage of such devices is the very large impact power, since during the direct course of a striker, only a portion of its end area is under pressure.

The closest in technical essence and the achieved result - the invention is an impact device for the formation of wells in the field by compacting it, containing a hammer with a window cavity located in its tail section, and a projection mixed in a cylindrical case with an exhaust window under the action of compressed air, and an air distribution pipe with a window installed in the cavity of the hammer. A disadvantage of such a device is the presence of a movable sleeve, which is intermixed by the impact of its projections with the protrusion of the moving drummer, which can lead to a see or cut of these projections. After collision, the sleeve can move by inertia, which leads to violation of the air distribution mode, i.e. to reduce the reliability of the device in the driver.

The aim of the invention is to increase the reliability of the device in operation.

For this, the protrusion protrusion is located in the cavity of its tail section and is made with a central channel and windows. Such an embodiment of the device ensures that the pressure of the compressed air influences the entire end area of the striker during its working stroke, which increases the impact power of the device without reducing its durability and reliability by eliminating the movable sleeve.

The drawing schematically shows the proposed device in the front position (moment of impact) - above the axis, in the rear position - below the axis

Case 1 Usgroysva has an exhaust window 2, closed with a protective casing 3 with a valve 4. Inside the case there is a drummer 5 with a window 6, a protrusion 7 having a central channel 8 and a window 9 and 10. ; which includes the pipe 12 with a window 13. The pipe with air supply with a hose 14 is fixed in the nut 15. In the device there are rabechi. cameras 16,17 and 18,

The device works as follows

In the initial position, the striker 5 is in the extreme rear position 1 (lower section on the drawing). The face of the striker face entering chamber 16, channel 8 and cavity 11 are constantly under compressed air pressure. A portion of the end face of the firing pin, exiting the chamber 17, before starting the forward stroke also communicates with the compressed air network through the windows 10 and 13. Consequently, the entire end face of the firing pin is under compressed air pressure.

The drummer begins to move forward. Windows 10 and 13 overlap, and the further movement of the striker is carried out by expanding the air in chamber 17 and the pressure in chamber 16 of cavity 11 and channel 8. At the end of the stroke, the striker hits the bolt. impact device into the ground. At that, windows 2 and 6 are burned. Through window 2, air from chamber 17 is released into the atmosphere and through windows 9 and 6 is compressed, air enters the front chamber 18.

The return stroke of the striker begins under the action of air pressure in the chamber 18 entering through the windows 9 and 6. Windows 10 and 13 are closed, the chamber 17 is disconnected from the network. Due to the difference in the areas of the drummer, which are under pressure from the chambers 18 and 16, and the cavity 11, the drummer begins to move backwards (in the drawing to the right). When moving, it overlaps the window in

And disconnects the camera 18 with the network. Further movement of the hammer is accomplished by expanding the compressed air in the chamber 18.

At the end of the return stroke, the firing pin opens a window 2 ti the compressed air from the chamber 18 is exhausted to the atmosphere. At the same time, it is open (windows 10 and 13 are wrung and compressed air enters chamber 17. Under the action of compressed air from the side of cavity 11 and chambers 16 and 17, the striker stops and starts moving to the left again. Then the cycle repeats.

Placement of the cylindrical protrusion. The impactor in the cavity of its tail and making this protrusion with the central channel and windows allows the removal of the movable air distribution sleeve, which works with shock loading and is able to mix. by inertia. Removing the movable sleeve improves the operation of the air distribution system, enhances the reliability and durability of the device.

Claims (2)

1. Author's certificate 1u 34553, cl. B O2 P .5 / 18, 1972. 2. Authors witness.t. № 216403, cl. H O2 F 5/16, 1967.