SU817250A1 - Percussive-action device for hydromechanical breaking of rock - Google Patents

Description

one

The invention relates to impact devices for mechanohydraulic destruction of rocks.

A shock action device is known for destroying rocks with a pulsed jet of fluid, comprising a cylinder with a nozzle head and a hydraulic chamber and a piston freely moving with compressed gas in the cylinder, impinging blows on the fluid in the hydraulic chamber, causing the pressurized liquid to be thrown through the nozzle paspimiaeMyre breed 1. .

However, the destruction efficiency of hard rock is very low, as the energy of the jet of liquid is not enough to create a sufficiently large damage in the massif. .

A percussion device for the destruction of rocks is known, in which a shock pulse is transmitted from the striker to a rock-breaking tool through a fluid chamber 12.

However, in this case, the contact area is only subjected to

mechanical loading and effective-. The failure rate remains low.

The closest technical solution to the present invention is a percussion device for mechanohydraulic destruction of rocks, including an axially movable rock-breaking tool located in a housing, having a channel for ejecting a portion of fluid under pressure, connected to the chamber filled with fluid, and a striker to communicate blows to the tool and liquids in came5 re Gz.

However, in the known device, the impact pulse from the striker is transmitted to the plunger, which moves in the chamber filled with liquid and forces the fluid out of it along the tool lead to the contact loading zone. With further movement of the striker, it strikes a tool that

Claims (3)

5 mechanically loads the contact zone. As a result, the fluid impact in the contact zone is ahead of the mechanical one, and therefore the destruction efficiency does not reach the optimum value. The purpose of the invention is to increase the effectiveness of the destruction of solid rock. The goal is achieved. The fluid-filled chamber is formed in the annular space between the side surfaces of the instrument and the housing, and the instrument has a piston head that closes this chamber and transmits pressure to the fluid at. bang on it. In this case, the most effective destruction efficiency is achieved, as a result of the initial impact of the tool, fractures are formed in the contact rock in the contact zone, and at the same time, the fluid penetrates deep into the array by high pressure, acting as a hydraulic wedge and destroying the rock . The drawing shows a diagram of a percussion device for a mechano-guide for the equal destruction of a rock. The shock action device for mechanohydraulic destruction of rocks comprises a housing 1 in which a working tool is installed for axial movement of a working tool 2 having a central channel 3 for ejecting a portion of liquid. Tool 2 is equipped with a piston head 4, which receives blows from a displaced axial HianpaBJieHHH striker 5. In the annular space between the side surfaces of the tool 2 and the housing 1 there is a chamber 6 filled with liquid, which is connected to the central channel 3 of the tool 2 through radial channels 7. Camera b through a check valve 8 connects to the source (not shown) of the working fluid. Piston head 4 closes chamber b and, when struck on it, the hammer 5 transfers pressure to the liquid. The device works as follows. The rock-destructive tool 2 is installed on the rock to be destroyed by the rock and the working fluid is supplied to chamber 6 through valve 8. The liquid fills chamber b and channels 3 and 7 of tool 2, the striker 5 strikes piston head 4 of tool 2. It is related to tool 2, which produces contact between rocks in the contact zone and causes cracks in it. At the same time, it moves in the direction of impact and the piston head 4 acts on the fluid in the chamber 6, pushing it through the channels 3 and 7 of the tool 2 into the zone of contact with the rock. Fluid under high pressure penetrates the rock cracks, acting as a hydraulic wedge and producing an additional amount of fracture. When the pressure of the fluid in the chamber 6 is increased, the check valve 8 closes the line (not shown) for supplying the fluid from the source. Rational use of the energy of the shock pulse in the proposed device allows increasing the efficiency of rock destruction and technical and economic indicators of its operation. The claims of the percussion device for mechanohydraulic destruction of rocks, including an axially movable rock-breaking tool located in a housing, having a channel for ejecting a portion of liquid under pressure, connected to the fluid-filled chamber, and a hammer to communicate blows to the tool and fluid into the chamber. the fact that, with the aim of increasing the efficiency of the destruction of solid rocks, the chamber filled with liquid is formed in the annular space between the side surfaces The instrument and the housing and the tool has a piston head, and closing the chamber to transmit davleyie liquid by hitting the striker therein. Sources of information taken into account with the addendum 1. US Patent No. 3601983, cl. 60-54.5, published. 1971. 2. Authors certificate of the USSR 393402, cl. E 21 C 3/20, 1970. 3. Authors certificateSSSR 613098, cl. E 21 C 27/12, 1976.