Air puncher

 

The invention relates to machines for construction, and is intended for sinking wells in the ground especially considerable length and curved at the trenchless laying of underground utilities. Air puncher includes a housing, a channel which, with the possibility reciprocating motion posted by drummer with support belts, the expansion joint gap between the casing and the drummer, made in the form prescribed by the drummer sleeve of elastic material. Mate drummer and sleeves are made on spherical surfaces with the possibility of swinging movement relative to each other. The invention provides increased uptime by eliminating the jamming drummer in the body, and weight loss and, consequently, increase the rate of penetration while maintaining a minimum of unproductive consumption of compressed air. 1 C. p. F.-ly, 3 ill.

The invention relates to machines for carrying out construction works, namely for sinking wells in the ground especially considerable length and curved at the trenchless laying of underground utilities.

A device for punching the well is practical a groove for the inertial lock for their connections, the drummer placed in the channel of the housing with the possibility of reciprocating motion, bearing (outer) surface of which is made of the same diameter throughout its length. A disadvantage of this device are frequent failures due to jamming of the drummer in the body due to bending of the latter when working in heterogeneous soils and when drilling curved boreholes. The increasing gap between the casing and the drummer only partially solves this problem, but it leads to the increase of unproductive consumption of compressed air. The increased stiffness of the body by thickening its walls leads to weight gain and, consequently, to decrease the rate of penetration of wells because of the deteriorating conditions of transfer of the shock pulse from drummer body, as well as reducing the impact energy (the ratio of impact energy to the area well).

Known percussion machine for making holes in the ground (air puncher) patent of Russian Federation № 2122621, E 02 F 5/18, E 21 In 7/06, publ. in BI No. 33, 1998, including the case with longitudinal ribs formed in the interaction of the punch with the soil cavity, individually communicated with the source of compressed air. In the housing cavity with limited back-ongoing the ends. In this car, designed for sinking wells of considerable length, including curvilinear, such execution drummer allows you to reduce the number of failures due to jamming it in case, but still listed in the description of previous similar disadvantages occur.

The closest in technical essence and the achieved result to the invention is a control device to control the forward and backward stroke of the pneumatic drilling device (reversible air puncher) for U.S. patent No. 4284147, F 01 L 21/02, F 01 7/18, publ. 18.08.1981, including housing, in the channel with the possibility of reciprocating motion posted by drummer with the supporting bands around at the ends. About the middle of the rear support band drummer placed expansion joint gap between it and the casing in the form of a sleeve of elastic material, coupled with the drummer on the cylindrical surface. When the device (punch) sleeve (expansion joint gap) under the action of the elastic properties of the material and the pressure of the compressed air is pressed against the surface of the channel body. Thus the gap between the casing and the drummer is reduced to a minimum, thereby reducing so settled between the channel body and shoulder support band drummer limited that leads to jamming of the drummer in the body, that is, the failures, the elimination of which is necessary to increase the thickness of the wall of the body and this leads to an increase in the weight of the punch and, as consequence, to decrease in the rate of drilling a well.

The technical problem solved by the invention is to increase uptime by eliminating the jamming drummer in the body and decrease with weight and, consequently, improve the speed of drilling a well while maintaining a minimum of unproductive consumption of compressed air.

This is achieved by the fact that punch, punch, including housing, in the channel with the possibility of reciprocating motion posted by drummer with support belts, the expansion joint gap between the casing and the drummer, made in the form prescribed by the drummer sleeve of elastic material according to the invention, mate, drummer and sleeves are made on spherical surfaces with the possibility of swinging movement relative to each other. When the curvatures of the body punch in the operating conditions of the bushing in collaboration with the drummer reciprocating motion monitors the channel of the housing. Drummer at the same it Dvizheniye surface of the bushing. This allows the firing pin to move freely in a substantially curved body that it eliminates jamming. For this reason, it is possible to reduce the thickness of the casing wall, thereby reducing the weight of the punch and, as a consequence, increase the rate of penetration of wells when using it while maintaining a minimum of unproductive consumption of compressed air.

Suitable front end of the sleeve to do with the extension, the outer diameter of which is larger than the diameter of the channel housing that will contribute to maintaining a minimum of unproductive consumption of compressed air.

The invention is illustrated by the example of a specific implementation and drawings, of which Fig.1 shows the air puncher with a partial section; Fig.2 - the expansion joint gap in the form of a sleeve between the housing and the drummer in section on a larger scale; Fig.3 is a longitudinal section of the front end of the sleeve (the expansion joint gap).

Air puncher (Fig.1) has a housing 1 with an internal channel 2, in which the possibility of reciprocating motion posted by drummer 3. The drummer has 3 front 4 and rear 5 support belts for moving centering it over the surface 6 of the channel 2 of the housing 1 and the groove 7 is in the rear part of the housing 1 through the absorber 10 with the exhaust holes 11. Boring 8 channel 12 in the slide valve 9 is constantly communicated with the source of compressed air, and the holes 13 in the wall of the striker 3 is a front cavity 14. The latter is formed by a space between the front housing parts 1 and drummer 3 and the space between the surface 6 of the channel 2 of the housing 1 and the groove 7 of the striker 3 is provided between the channels (Fig.1 not shown), between the surface 6 and faces 15 on the front support belt 4 of the striker 3. The rear cavity 16 is constantly communicated with the atmosphere through the exhaust holes 11 in the shock absorber 10. Back support belt 5 of the striker 3 (Fig.2) is formed by a sleeve 17, ov paired his inner spherical surface 18 with the response of a spherical surface 19 of the striker 3 and the outer surface 20 of the housing 1 with the surface 6 of the channel 2. The geometric dimensions of the elements of the striker 3 and the sleeve 17 are selected in such a way that the drummer 3 and the sleeve 17 had the opportunity swinging movement relative to each other. The front end of the sleeve 17 is made with the extension 21 (Fig.3), the outer diameter D1which in a free state is larger than the diameter D of the channel 2 of the housing 1. The sleeve 17 is made of an elastic material, such as polyurethane, so that its front end 21 tightly pile is between the surface 6 of the channel 2 of the housing 1 and at the same time the rear support collar 5 of the striker 3.

Air puncher (Fig.1) works as follows. The compressed air on channel 12 in the slide valve 9 is supplied into the bore 8 of the striker 3 and further through the holes 13 in the front cavity 14. Since the area of the striker 3 from the side of the cavity 14 more of its area from the side of the bore 8, the drummer 3 begins to move toward the rear of the punch. After plugging the holes 13 of the spool 9 admission of compressed air into the cavity 14 will stop and it will start expanding clipped in her air. After opening the valve 9 holes 13 from the cavity 14 through the cavity 16 and the exhaust holes 11 in the shock absorber 10 will exhaust air, and drummer 3 will continue its movement by inertia. Not reaching a certain distance of the shock absorber 10, drummer 3 stops under the action of compressed air on it in the bore 8 will begin to move towards the front of the punch. After closing the valve 9 holes 13 in the cavity 14 will compress cut off air. After the opening of the holes 13 of the spool 9 in the cavity 14 is described by way of bore 8 will start flowing compressed air. Overcoming the back pressure side of the cavity 14, the striker 3 is a blow to the front of the housing 1, advancing it in the ground and is Bojnice sleeve 17 with their front end 21 is constantly pressed against the surface 6 of the channel 2 of the housing 1 because the set of its geometrical dimensions, material properties and under the action of pressure from the front cavity 14. This virtually eliminates wasteful consumption of compressed air through the gap between the surface 6 of the channel 2 of the housing 1 and the surface 20 of the sleeve 17. When the air pressure in the front cavity 14 above atmospheric, the sleeve 17 is pressed on the front part of its spherical surface 18 to the front of the spherical surface 19 of the striker 3, which also eliminates wasteful consumption of compressed air through the gap between the surfaces. When arising in the process, the curvature of the housing 1 sleeve 17, moving together with drummer 3, centered at the surface 20 on the surface 6 of the channel 2 of the housing 1. When this drummer 3, performing reciprocating motion, at the same time and makes swinging movement relative to the sleeve 17 when the slippage of its spherical surface 19 on the response of the spherical surface 18 of the sleeve 17. This helps to eliminate jamming of the striker 3 in the housing 1 when it is bent, and weight reduction by reducing the wall thickness of the housing 1, thereby improving the rate of penetration due to better conditions of transfer of impact energy from the drums 3 to the housing 1 and increase Udelny>

1. The punch, punch, including housing, in the channel with the possibility of reciprocating motion posted by drummer with support belts, the expansion joint gap between the casing and the drummer, made in the form prescribed by the drummer sleeve of elastic material, characterized in that the coupling between the drummer and the sleeves are made on spherical surfaces with the possibility of swinging movement relative to each other.

2. Air puncher under item 1, characterized in that the front end of the sleeve is made with the extension, the outer diameter of which is larger than the diameter of the channel of the housing.

 

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