SU861536A1 - Drill bit washing unit - Google Patents

Description

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The invention relates to a porsdo destructive tool of a jetting type, namely, their washing units.

A drill bit of the drill bit is known, which includes a nozzle with an extension ring, which is inserted into the socket of the flushing channel and fixed by means of a locking element in the yide of the threaded rod II.

The drawbacks of such a flushing unit are manufacturing complexity and low operational reliability.

The most closest to the technical essence and the achieved result is the flushing unit of the drill bit, which includes the housing, the channel for. flushing, fluid, nest, made eccentric with respect to the channel and one end of the collar for the nozzle, sealing element and locking screw f2}.

This flushing unit has insufficient reliability of the creagyuni nozzle due to the gap between the nozzle and the housing.

The aim of the invention is to increase the fastenness of attachment of the nozzle.

This is achieved by the fact that the washing unit is provided with an insert placed in the nest between the nozzle and the housing with the possibility of fixing with a locking screw.

FIG. 1 shows the wash

5 node in section, general view; on

FIG. 2 is a view A of FIG. one; in fig. 3 is a variant of the first assembly knot with an extended extension in FIG. 4 - liner, general view.

О The flushing unit has a housing 1 with a socket 2 and a channel 3 for the washing liquid, which are eccentrically relative to each other. In slot 2, collar 4 is mounted on .15 cage 5 with sealing element 6 placed on its upper end. Between nozzle 5 and housing 1 in slot 2, warm up the liner 7, fixed by a locking screw 8. For installation and installation 9, and for dismantling, a recess 10 is provided for the hook device 1.

The presence of the collar 4, having a significant height, prevents the nozzle 5 from being squeezed out with a flushing fluid and washed away by the reflected jet. At the same time, due to the use of stepped nozzles 5, the necessary approach of their output end to the face is provided. The use of the liners 7 improves the alignment of the nozzle 5 in the nest 2 and the operating conditions of the stress element 6. All this increases the reliability of the sealing of the flushing unit and the reliability of fastening the nozzle 5.

Formula inventions

A piercing drill bit assembly that includes a housing, a channel for flushing fluid, a tee, a socket, made extradeutrically relative to the channel, and

having a collar for the nozzle, a sealing element and a locking screw, characterized in that, in order to increase the reliability of the attachment of the nozzle, it is provided with a insert housed in the slot between the hinge and the housing with the possibility of locking by the locking screw.

Sources of information taken into account in the examination

1. Patent C3UA No. 3137354, cl. 17 | -340, pub. 1964.

2. The USSR USSR Certificate in Application No. 2541516 / 22-03,

cl. E 21 V 9/35, 1S77 (prototype).

8and A

Fig /

FIG. 2

6

(Pui. Do

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Claims (1)

Claim The flushing unit of the drill bit, comprising a housing, a channel for flushing fluid, a socket made eccentrically relative to the channel and having a collar for the nozzle, a sealing element and a locking screw, characterized in that, in order to increase the reliability of attachment of the nozzle, it is provided with an insert placed in the slot between the nozzle 5 and the housing with the possibility of fixing with a locking screw.