SU1373030A1 - Hydraulic percussive mechanism - Google Patents

Abstract

The invention relates to the mining industry and makes it possible to increase the reliability of the mechanism by eliminating the influence of leaks and the performance by regulating the energy and frequency of impacts. The mechanism includes a housing 1, in which the head 2 with a piston 3 and a rod 4 is located. They form a cocking 5 n overflow 6 chambers and a cavity 7 of the energy accumulator. The stepped valve (K) 8 is movably mounted coaxially to the striker 2. It forms its inner surface with a corner

Description

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Gatoka A annular cavity (CP) 9. Supporting K 14 is installed in the pressure line 15. A sleeve 10 is placed on the stem 4 with the possibility of axial movement and entry into the gearbox 9. During the operation of the mechanism, fluid from the line 15 enters the chamber 5 and lifts the head 2 with K 8 “Sleeve 10 is included in gearbox 9, and the pressure in it increases.

373030

When the gearbox 9 is connected to the camera 5, the striker strives to strike. Subsequently, K 8 is lowered and aligned with the piston 3. The cycle is repeated. The frequency of impacts and the stored energy depend on the position of the sleeve 10, which is moved when the tool 17 is inserted into the ground by the impact of the striker 2. 1C. f-ly, 10 silt

The invention relates to the mining industry and can be used to create hydraulic mechanisms of percussive action for the destruction of rocks.

The purpose of the invention is to increase the reliability of the mechanism by eliminating the influence of leaks between the body and the striker stem on the operation of the mechanism.

The drawing shows the proposed mechanism.

The hydraulic percussion mechanism comprises a housing 1, a firing pin 2 with a piston 3 and a stem 4, located in housing 1 and forming with it a cocking 5 and overflow 6 chambers and a cavity 7. of energy accumulator 7 filled with gas.

In the stem 4, the stepped valve 8 is coaxially displaced axially biased to periodically interact with the piston 3 of the striker 2 o The annular cavity 9 of the valve is formed by the inner surface of the stepped valve 8 and the surface of the rod 4. On the stem 4 of the striker 2 a sleeve 10 is installed with the possibility of axial movement and made with the possibility of its entrance into the cavity 9. In the housing 1 is made channels 11, 12 13. Channel 11 is connected to channel 12 through the retaining valve 14 and to the pressure line 15 through valve 14 o Channel 13 is connected to the drain line 16. In the lower part of the housing 1, an instrument 17 is installed, which with the housing 1 forms a cavity 18o. The latter is connected to the cavity 19 of the movable sleeve 10 through a check valve 20 and a throttle 21 "

The hydraulic percussion mechanism works as follows.

The working fluid flows from the pressure line 15 through the pressure valve 14 into the charging chamber 5 and moves the firing pin 2 with the valve 8 up, acting on the active area of the piston 3 of the striker 2. When the sleeve 10 enters the cavity 9, the overflow chamber 6

disconnects (loses connection) from cavity 9 and pressure in the latter begins to increase, disconnecting the striker 2 from valve 8. Kdk only cavity 9 is connected to the charging chamber 5,

hammer 2 rushes to blow under

the action of gas in the cavity 7 of the energy accumulator and the pressure in the charging chamber 5 drops. Pressure is established in pressure line 15,

determined by the retaining valve 14 and which through the channel 12 acts on the stepped valve B, moving it down. In the lower position, the piston 3 of the striker 2 is aligned with the stepped valve 8 and the cycle is repeated. The sleeve 10 is installed in the overflow chamber b movably. The height of the platoon of the striker 2, and therefore the frequency of impacts and energy, is reserved

battery, depending on the position of the sleeve 10 on the rod 4. The height of the platoon of the striker 2 can be adjusted automatically using the sleeve.

Depending on the strength of the medium being developed, the introduction of the tool 17 per blow due to the energy of the striker 2 will be different. Having introduced a tool 17, it displaces the working fluid from the cavity 18 through the check valve 20 and the throttle 21 into the cavity 19 of the sleeve 10, moving it.

Claims (2)

1. Hydraulic percussion mechanism, comprising a housing, a firing pin with a piston and a rod, located in the housing and forming with it the charging and overflow chambers and the energy accumulator cavity, a stepped valve mounted coaxially with axial displacement, the inner surface of which forms the valve annular cavity with the stem surface of the retaining valve installed in the discharge line, and a drain line differing from that, in order to increase the reliability of the mechanism at the expense of IS373030. The key is affected by leaks, it is equipped with a sleeve mounted on the striker rod, the sleeve being configured to enter the annular cavity of the valve. 2. The mechanism of the pop, 1, distinguished by the fact that, in order to increase productivity by adjusting the energy and frequency of impacts, the sleeve is installed on the striker rod with the possibility of axial movement.