RU45441U1 - SUBMERSIBLE SHOULDER - Google Patents

Abstract

The utility model, a submersible hammer with zolotnik-free distribution, relates to the mining industry, in particular to submersible pneumatic impact machines, for drilling wells for various purposes in underground and opencast mining for the extraction of ores and other minerals. Closed-end pneumatic hammer with a central exhaust comprising a cylinder body; a piston-drummer located in its cavity with air distribution channels dividing the cavity into working and idle chambers; lead tube; adapter and axle box for fastening the tool (crown) The drum on the outer diameter is made by a stepless cylinder, and a step boring is made in the lower part of the drummer to enter the exhaust pipe of the crown tool. Compressed air through the inlet tube and the drummer’s channels is alternately supplied to the working and idle chamber, forcing the drummer to move in one direction or another, making the hammer working and returning. All exhaust air is exhausted through the exhaust pipe of the tool-crown thereby ensuring its cooling and removing the spent sludge from the face.

Description

The proposal relates to the mining industry, in particular to submersible pneumatic impact machines, when drilling wells for various purposes in underground and opencast mining for the extraction of ores and other minerals.

Known submersible hammer with valve distribution with a lateral radial exhaust containing the housing, the shock placed therein, an air distribution device in the form of a plate ring valve, an air supply tube and a tool holder. (1, p. 16, Scheme No. 1.11).

The presence of exhaust side windows on the cylinder body leads to the ingress of spent sludge on the friction surfaces of the piston-hammer and the cylinder, premature wear of the friction surfaces and loss of productivity.

The closest analogue, widely used, was a submersible hammer with an ashless distribution of a closed type with a central exhaust.

Contains: body-cylinder, step piston-drummer with air distribution channels separating the cylinder into two cavities, a supply tube, an adapter and an axle box with a nipple for mounting the tool. (2, p. 36, scheme No. 1.50)

The advantage of this model is the central exhaust air exhaust, which is aimed at cooling the crown tool and purging the well, which leads to an increase in the speed of penetration and durability of the crown tool.

The disadvantage of this hammer is the low resistance of the loaded part of the piston-hammer due to the fact that the piston-hammer is made stepped along the outer diameter, with a decrease in diameter to the direction of the impact end. In the place of the diameter difference, stress concentrators are created, which leads to breakdowns of this part at maximum loads.

The inventive utility model solves the problem of increasing the resistance of the piston-hammer, the service life and reducing the complexity of manufacturing a hammer, as well as increasing the speed of penetration by increasing the resistance of the tool-crown

The inventive utility model contains the following distinctive features from the closest analogue:

The piston drummer on the outer diameter, made as a stepless smooth cylinder and shortened in length.

There is no nipple in the lower part of the hammer, which, in contact with the outer diameter of the last stage of the hammer, controlled the exhaust from the reverse chamber.

According to a new scheme, the exhaust process is carried out due to the interaction of a stepped bore in the lower part of the hammer and the exhaust pipe of the tool-crown. Due to changes in the design of the hammer, its dimensions and weight are reduced.

The essence of the utility model is illustrated by the drawing, where in Fig.1 shows a General view of the hammer.

The operation of the hammer occurs due to the supply of compressed air energy from the line at the rod end through adapter 1, the distribution pipe - 2, the piston-hammer cavity - 3 into the forward chamber - A or reverse - B stroke.

When air enters through channels - B (firing pin - 3) into the return chamber - B, the piston-firing pin moves in the cylinder body - 4 towards the adapter - 1 on the return stroke.

When air enters the cavity - G, channels - D and into the forward stroke chamber - A, the piston-hammer moves from the side of the axle box - 5, a stroke occurs on the stroke along the end of the crown tool - 6.

The exhaust from the working stroke chamber - A is carried out when the piston-striker moves to the reverse stroke, through the channel - D, cavity G, the central channel - E (hammer 3), the channel - Zh, the tube - 7 crown tool - 6.

The exhaust from the reverse chamber - B occurs through the pipe - 7 crown tool - 6.

Sources of information:

1. Machines for drilling wells with submersible hammers in underground conditions. Institute of Mining. Novosibirsk 1965

2. Pneumatic impact machines for sinking wells and holes. NN Esin et al. Novosibirsk: Science 1965

Claims (1)

A submersible hammer with a zolotnik-free distribution of a closed type with a central exhaust, comprising a cylinder body, a step piston-hammer with air distribution channels, a supply pipe, an adapter, a nipple and an axle box for mounting the tool, characterized in that the outer diameter of the piston-hammer is stepless, and a stepped bore is made in its inner central channel, into which, when moving on the move, the exhaust pipe of the tool enters.