DE1634579B1 - Device for making horizontal or slightly inclined holes in soft ground - Google Patents

Claims (5)

1 2 The invention relates to a device for pegs 6 and 7 guided in the housing 1, whereby set horizontal or slightly inclined a clearance between the mentioned guide ring holes in soft soil with one in a gene 6, 7 and the impact body 2 remains, the one Impact body used in the housing, which allows the housing 1 to be bent slightly. Of the Compressed air is applied, impact pulses on the 5 rear guide ring 7 is encased with sealing rings 8 exercises, and with one in the rear part of the see, while the front guide ring 6 through housing existing control device. aisles 9 for the air to flow through. Such holes can, for example, under In the rear part of the impact body 2 are in the man- Road or railway embankments may be required around tel3 holes 12, which make it possible laying pipes or cables through them. io that the working chamber 11 with the air supply line Devices for this purpose are known, each via a channel 15 in the stepped socket 14 but their widespread use so far is connectable. limits the disadvantages associated with them. The socket 14 and the flange 16 are through a Very often it has not been possible to connect the plastic pipe 17 to one another,
any reason stuck in the hole 15 The gradation in the front part of the socket 14 he device to get going again. Either the floor had to be lifted into the cavity 10 of the striking body 2 or, in the case of and covering concrete ceilings when the striking body 2 was moved, the entire device had to periodically move the bores 12.
left in the hole. The reason for the plastic tube 17 getting stuck between the bushing 14 was in most cases that 20 and the flange 16 enable their mutual movement when the housing 1 is bent, with any intermediate position of the impact body.
Starting the device is no longer guaranteed The device works as follows:
is, even when using a start valve, as a result of the impact body 2 is in the insufficient functional speed. Position shown in the drawing and is compressed air in In some devices, moreover, often 25 pass through the cavity 10, so the compressed air penetrates Foreign bodies in the device, which then lead to a through the holes 12, the space between Clamping the impactor leads. the jacket 3 and the housing 1 and through the The invention is based on the object of the passages 9 in the guide ring 6 in the working impact body with such a compressed air control chamber 11. Since the front boundary surface of the Mechanism to equip that he always 30 working space 11 the air pressure a greater starting the device and thus offers a permanent grip area than the rear one, the rear and reliable work guaranteed. running movement. According to the invention, this task is achieved at the moment in which during the return movement triggers that the control device from one with the air- the front part of the bushing 14 the bores 12 supply line connected, a gradation that releases in 35 after passing the steps 18, the for Impact body from existing holes periodically - return the impact body 2 to the working chamber covers, having socket and an elastic with mer 11 used working air through the holes this socket is connected to the flange. 12 now in the cavity between the socket 14 and Due to this special design of the control unit the housing 1 via the openings 19 in the flange direction, the advantage is achieved that the device 40 16 and the elastic valve 20 on the flange 16 ins device is pressed again in every position of the firing pin, can drive. When further supplying compressed air into the To prevent the penetration of foreign body cavity 10, the impact body 2 begins in the pern in the device is preferably to move on the flange housing 1 in the forward direction and an elastic valve is provided which transmits an outflow 45 to the housing 1 at the end of its stroke the used working air allows, but an impact pulse through which the housing 1 penetrate of foreign bodies that are driven by the forward movement. the suction caused by the impactor is prevented. Wei- Da during the working stroke in the cavity between Further features of the invention are the subject of the socket 14 and the housing 1 a negative pressure Claim 5. 50 arises, foreign bodies could pass through the opening 19 Attempts to penetrate the device with devices according to the invention. This prevents that achieved an operating time of over 500 operating hours on the flange 16 arranged elastic valve 20, the where the impact energy is around 18 to 20kp / m ^{: there is} no resistance to the outflow of the exhaust air. and the number of strokes was 380 to 400 per minute. opposed, but the ingress of foreign objects The invention is prevented by means of an embodiment,
example with reference to the drawing
explained. The drawing shows a section through a previous patent claim:
direction according to the invention. In a tubular housing 1, which is pointed at the front 60 1. Device for producing horizonta, an impact body 2 is arranged, which consists of len or slightly inclined holes in white Sheath 3 and a bolt 4 consists of chem soil with a penetration in a housing a cone 5 are connected to one another. The set impact body, the impact body that is loaded by compressed air 2 can be made in several parts, impacts, impact pulses on the housing ausweil he is then more flexible and thus practices at the same 65, and with one in the rear part of the case Impact energy the housing 1 is less stressed, existing control device, thereby Gewodurch a longer service life is guaranteed. indicates that the control device is off The jacket 3 is connected to the air supply line (13) by means of two short guides. NEN, a gradation that periodically covers existing holes (12) in the impact body (2), having Bush (14) and a flange (16) elastically connected to this bush (14). 2. Apparatus according to claim 1, characterized in that the socket (14) and the Flange (16) are connected by a plastic tube (17). 3. Apparatus according to claim 1 or 2, characterized in that the rigid in the housing (1) has inserted flange (16) openings (19). 4. Device according to one of claims 1 to 3, characterized in that the flange (16) an elastic valve (20) is arranged. 5. Device according to one of claims 1 to 4, characterized in that the impact body (2) is mounted in the housing (1) by means of short guide rings (6,7), of which the front (6) has passages (9) for the compressed air and the rear (7) sealing rings (8). 1 sheet of COPY drawings