SU791904A1 - Device for sinking holes in earth - Google Patents

Description

I

The invention relates to the field of construction and can be used for trenchless laying of communications.

A device for the formation of wells, which has a drive in the form of a screw-nut non-braking screw pair, is known, and the hydraulic cylinder 1 is feeding.

The drawbacks of the design of this device are: the difficulty of connecting the nut with the ground-compacted projectile screw drive and.1 eet contact with the ground, which contributes to the rapid wear of the screw pair.

In the known device, the pitch of the screw working tip must be equal to the pitch of the screw non-braking drive cutting, i Therefore, when this device is in operation in soils with small coefficients of friction (i.e., in wet), it is possible to unscrew the working member under the action of axial load on it.

It is known another device dp formation of wells in the ground, including a housing, a hydraulic cylinder, the piston of which is installed with

interaction with screw thread of the screw, and at the end of the rod is fixed screw working body. The screw engages with a spring-loaded K5ufta attached to the tip of the nut and is connected to the free end of the hydraulic cylinder rod 21. A disadvantage of the known device is that the spring-loaded

The coupling with the nut is structurally complex, and the thread cutting on the shaft of the screw member is hammered with soil.

15 In addition, since the pitch of the screw member is equal to the tuary non-braking of the shaft-nut spacing, it is possible that the working member spontaneously unscrews under load.

20 The purpose of the invention is to improve the reliability of the device.

This goal is achieved by the fact that in a device that includes a housing, a hydraulic cylinder, the piston of which is mounted with the ability to interact with the screw screw load, and at the end of the rod there is a screw working element fixed, the rod is hollow, and the piston is threaded

30 hole in which the screw is placed

with the possibility of movement in the stem bore.

In addition, the shaft of the screw of the working body is made with a guide groove and has an additional turn of the helix mounted to move in the right direction

Figure 1 shows the device, a longitudinal section; fig 2 is the same cross section; Fig, 3 - screw working body; Fig, 4 - the same, top view.

The device consists of a hydraulic cylinder body 1, inside which there is a piston 2, which interacts with a screw thread of a screw 3, one end of which is inserted into a hollow rod 4, on which a screw working body 5 is fixed. At the second end of a screw 3 there is a locking device 6 that controls The auxiliary hydraulic 7, the tip 8 with the bearing 9 and the longitudinal ribs 10, in which the oil pipes 11 and 12 are located, are attached to the cylinder body 1,

The screw body 5 consists of a shaft 13 fixed on the stem 4j of the coil 14, rigidly fixed on the shaft 13, and a spiral spring coil 15, which plays the ability to move along the shaft 13. On the spring coil 15 there is a protrusion 16, para. moving in the groove 17 of the shaft 13.

The device works as follows.

When supplying the working fluid under pressure through the pipe 12, it enters the auxiliary hydraulic cylinder 7, which stops the crane with the locking device 6 (ton 3. Under the pressure of the working fluid, the piston 2 moves in the hydraulic cylinder body 1, rotating along the screw thread 3. The rotary-progressive the movement of the piston 2 through the rod 4 is transmitted to the working body 5 which is screwed into the ground. The housing 1 is kept from rotating by the ribs 10. After screwing the working body 5 into the ground with a full code, the working fluid 2 is pressurized on line 11 fed to the sub gndrotsilindr 7 which otstoporivaet clutch device 6 of the screw 3, willows working chamber of the hydraulic cylinder 1.

Under the action of the working fluid is a progressive movement.

forward of the device body 1, while the screw 3 rotates freely in the paren 2, at the initial moment of the movement of the body 1 as a result of transmission through the rod 4, the force on the working body 5 spiral spring coil 15 is compressed by the length of the groove 17. In this case the turn of the coil 16 rests on the wall of the groove 17. This position of the blade prevents Q. Unintentional unscrewing of the working body 5 when the body 1 is tightened,

With the most advanced tightening of the body to the working body 5, screwed in. in the ground, the formation of the well D in the ground occurs.

After the housing has completely moved onto the piston stroke, the cycle is repeated.

The advantages of the invention are as follows: a screw threading screw is not clogged with soil.

and is always in the oil bath, which increases the durability and reliability of the drive; the dimensions of the drive are reduced, which contributes to the reduction of friction forces along the side 25 surfaces of the body; screwing and unscrewing the tool is provided.

Claims (2)

1. A device for the formation of wells in the ground, including a housing, a hydraulic cylinder, the piston of which is 5 Tanovlena with the ability to interact with the screw thread screw, and. A screw working body is fixed at the end of the thread, characterized in that, in order to increase the reliability of the device, the current is hollow, and the piston has a threaded hole in which a screw is placed so that it can move in the stem hole. 2. The device according to Claim 1, clause 1 and 5, in that the screw shaft is The working body is made with a guide groove and has an additional turn of the helix mounted with the possibility of movement in a guide groove. .. Sources of information taken into account in the examination 1. Copyright USSR USSR № 523164, cl. E 02 F 5/17, 29.01,73. e2. USSR author's certificate No. 303454, cl. E 02 F 5/30, 08.19.68 (prototype). 3 i