SU1469117A2 - Percussive assembly of electromagnetic perforator drill - Google Patents

Description

(61) 1167314

(21) 4274967 / 23-03

(22) 05/21/87

(46) 30.03.89. Bul № 12

(71) Institute of Mining, Academy of Sciences of the Kazakh SSR

(72) V.A. Svischev and A.A. Kalashnikov

(53) 621.643.2; 624.13 (088.8)

(56) Author's Certificate of the USSR No. 1167314, class, E 21 C 3/16, 1984.

(54) SHOCK.NY. TUBE OF ELECTROMAGNET PUNCHER

(57) The invention relates to the first technique and can be used.

in electromagnetic perforator, x, gfrednachenashenny for drilling holes and wells in hard rocks. The purpose of the invention is to increase the impact energy and the power unit strike of the impact node due to the additional cooling system. The impact node consists of rome 1 with poles 2–4, coils of 5.6 forward and reverse-arc strokes. 5 and 6 are mounted on a non-magnetic guide 7. Inside, there is a firing pin (B) 8 with a deep axial bore 10 and a shock absorber 12 with a central channel 14. The water supply tube (BT) 15 is fixed in the channel 14. The free end of the BT 15 enters the blind hole 10 B, the depth of which is O, 75- 0.8 length B 8, under the action of current pulses B 8 makes reciprocating movement relative to BT 15. For cooling B 8 in the zone of impact on the shank, water is fed at 18. Additionally B 8 is cooled with water from chamber 13 through W 15 to hole 10. Water flows out from the hole 10 through the gap between it and the BT 15, it cools the impact zone B 8 oo to the shock absorber 12. This allows the cooling fluid to be introduced inside B, additionally cooling the least accessible parts B 8. 1 Cp. f-ly, 1 ill. with

(L

The invention relates to a conventional technique and can be used in electromagnetic perforators for drilling holes and boreholes in hard rocks.

The purpose of the invention is to increase the efficiency of the impact unit and increase the energy of the impact due to the additional cooling system.

The drawing shows a shock knot, ate, general view.

The percussion unit of the electromagnetic perforator contains a magnetic core consisting of double-walled 1, front 2, middle 3 and rear 4 poles, forward 5 coils and reverse 6 coils, each of which consists of several sections. Coils 5 and 6 are mounted on a non-magnetic guide 7, in the internal cavity of which a ferromagnetic head 8 with longitudinal slots 9 is located on the side.

14)

surface with a blind axial bore 10, which interacts with the drill shank 11 and the shock absorber 12. The latter is located in the chamber 13 and enters the guide 7. In the shock absorber 12 there is a central channel 14 in which the water supply pipe 15 is reinforced the free end into the blind hole 10 of the striker 8, for communication with the chamber 13 of the shock absorber 12.

The cooling system encompasses all sections of coils 5 and 6, PMO 1, poles 2-4, guide 7 and chamber 13, which is connected via a check valve 16 to the pressure line 17. B to the front pole. 2, a channel 18 is provided with an adjustable choke 19 for supplying water from the cooling system to the guide 7, to the impact zone of the hammer 8 on the drill shank 11.

Impact site works as follows.

Under the action of current pulses generated by a power supply unit (not shown), the firing pin 8 makes a reciprocating motion, strikes the shank of the drill 11 in the direct course, and the shock absorber 12 - at

the reverse.

In hermetic annular gaps (cavities) between the sections of the coils 5 and 6, as well as between their extreme sections and the poles 2-4, cooling water coils 5 and 6 are supplied from the pressure head 17. Dp the cooling of the drill shank 11 and the striker 8 in the impact zone, water is supplied through the channel 18 with the choke 19.

The firing pin is additionally cooled from the inside with water coming under pressure from chamber 13 through a tube 15

bore hole 10. The amount of water for internal cooling is regulated by a choke (not shown), installed in front of the return valve 16. The treated water flows out of the hole 10 through the gap between it and the pipe 15, simultaneously cooling the impact zone of the striker 8 by the shock absorber 12. Then this water is removed through the drain holes .

Making a blind hole in the striker with the formation of a cavity inside the striker allows the coolant to be introduced into the striker, i.e. in the most difficult part of it to be cooled. The depth of this hole is 0.75-0.8 lengths of the striker and taken from the condition of maintaining the necessary strength of the striker face of the striker.

Claims (2)

1. Impact assembly of an electromagnetic perforator, auth.St. No. 1167314, characterized in that, in order to increase the efficiency of the impact unit and to increase the impact energy due to the additional cooling system, it is equipped with a water supply pipe, and a central channel is installed in the shock absorber, in which one end of the water supply pipe is fixed, the other end of which is placed with a gap in the blind axial hole made in the striker to communicate the cavity of the striker with the shock absorber chamber, while the striker is mounted for movement relative to the tube. 2. Node according to claim 1, characterized in that the depth of the blind axial hole is 0.75-0.8 of the striker length. 19 If 2 I I, 5 g ff 7; f