SU616393A1 - Double-action percussive device - Google Patents

Description

(54) DOUBLE ACTION PIPE

one

The invention relates to a technique for drilling wells, namely to hydraulic hammer drilling machines.

A hydraulic hammer is known in which autonomous resonators 1 are used to improve the efficiency.

However, such a device is not sufficiently convenient to operate due to the bulkiness of the dimensions.

Closest to the proposed double-acting hydraulic hammer, including a prefabricated body, a slotted nut, an anvil with a bit, a differential ring valve and a spring-loaded piston. tray 2.

A disadvantage of this device is that the hydraulic stroke of the forward stroke is transmitted directly to the piston-hammer, which somewhat reduces the efficiency of the hydraulic hammer because of the loss of part of the energy of the hydraulic shock in the expansion pipe.

The aim of the invention is to increase the efficiency of the machine and reduce its dimensions.

This is achieved by the fact that the hydraulic hammer is equipped with a resonator made in the form of a hollow differential piston mounted concentrically in the housing with the ability to interact with a hammer with a hammer through its spring.

The drawing shows the proposed gpdroudarnik, longitudinal section.

The hydraulic hammer body consists of two screwed cylinders 1 and 2. In cylinder 1 there are holes 3, 4 and ring groove 5, and in cylinder 2 channels 6 and 7. In cylinders 1 and 2, there is a differential, respectively, Kotapan 8 with internal eccentric annular protrusion 9 and bores. 10 and piston-hammer 11 with annular protrusion 12. The diameter of the circumference of the annular section 12 of the piston tip - hammer 11 is smaller than the internal diameter of the eccentric protrusion 9 of the valve 8. With such 5 designs of these parts, the valve 8 can yt-fitted onto the piston hammer 11 m or removed from it is only hammers housing. In the case of a hydraulic hammer in connection with the eccentricity of one of the annular projections of these parts

0 valve with piston hammer excluded.

The cylinder 1 is closed by a slotted nut 13, in which the anvil 14 is placed, fastened to the bit 15. In the slotted nut 13 and the anvil 14, there are 5 channel channels 16. The piston-hammer 11 is dead in the area uncompensated by the pressure of the spring 17.

Cylinders 1 and 2 are placed in a cylindrical casing 18, which forms an annular channel 19 with cylinders. On the outer surface of the Norsky hammer, 1I is annular 20, serving as a channel, and axially made of a cam 21, connected by holes 22 with annular groove 20. The hydraulic hammer is equipped with a resonator, made in the form of a diff. Recess of the hollow piston 23, the small end of which is freely placed in chamber 21 and the large end in the flap 24 of the housing.

Porschep 23. can not move axially relative to the body and the northerner 11. With its uncompensated pressure, it rests on the spring 17. The cross-sectional area of the chamber 21 is smaller than the working piston area of the striker.

The device works as follows.

In the drawing, the details of the hydraulic hammer are shown in the original position, with this. Claian 8 is bent towards the anvil 14, as a result of which the exhaust ports 16 are closed, the valve bores 10 are opposite the annular groove 5 (at its upper edge), whereby the piston chamber the piston of the hammer 11 communicates through the holes 10, the annular groove 5, the holes 4, the channels 19, 7, 20, 22 with the piston axle chamber 21 and the pressure pipe.

Pressure fluid from a pipeline rigidly fastened with an end nut (pipeline in the drawing is not shown) enters through the cavity of the piston 23 into the above-piston axial chamber 21 and then through the channels 22, 20, 7, 19, 4, 5, 10 into the sub piston cavity of the Norsh - hammer 11, takes the piston-hammer back, compressing the spring 17.

Having traveled a predetermined distance, the piston of the hammer 11 touches with its fender 12 through the inner eccentric annular protrusion 9 of the valve 8 and tears the valve off the anvil 14, opening the exhaust ports 16. Thereafter, the valve 8 moves back. independently, because from the areas of its ends, front and rear, streamlined by pressurized water, the area of the front (bottom) end is greater than the area of the back (top) end by the amount of uncompensated pressure by area, I inform Shoy through holes 3 with camber space. In the initial period of its mixing, the back (upward) opening 10 of valve 8 is displaced relative to the annular

groove 5 and will quickly overlap. The hammer piston 11 stops, the fluid column in the pipeline also stops and a hydraulic shock occurs that transfers its energy through the piston 23 to the spring 17, and also acts directly on the hammer 11 through the bottom of its axial chamber 21..

Under the action of the spring 17 that is depressed and the fluid pressure to the bottom of the axial chamber 21, the piston-hammer 11 rushes forward, displaces water from the piston cavity out through the exhaust ducts 16. At this, the hammer-piston 11 encounters a valve 8 moving towards it with the pressure of the exhaust fluid and carries it together with itself, strikes the anvil 14, fastened with the chisel 15, presses the valve 8 to the anvil 14. As a result, the water is expelled to the outside of the podschnevnoy cavity with a hammer 11 and again a column of fluid in the pipeline tanavlivaets. A hydraulic shock occurs, which, in connection with the fact that the valve openings 10 in its lower position coincide with the annular groove 5, is transmitted through these openings into the pistol sub-cavity of the hammer. The force of the water hammer and the overpressure of the liquid is driven back by the hammer and the process is repeated.

The proposed hydraulic hammer scheme improves efficiency, since hydraulic shocks are transmitted to an elastic element that accumulates energy and transfers it to the hammer; and reduce the size of the device.

Claims (2)

1. USSR Author's Certificate No. 295854, cl. E 21 V 1/06, 1971. 2. USSR author's certificate number 549568, cl. E 21 V 5/00, 1972. 0 Iff 8 and J 5 it П 2 11 3 years 20 7