RU1798165C - Hydraulic hammer - Google Patents

Abstract

Usage: the field of mechanization of the processes of destruction of rocks, oversized, frozen soils, the immersion of piles, dowels and leaders, pillars of concrete, metal, soil compaction. Essence: the system of reciprocating movement of the shock part is made in the form of a combination of two hydraulic cylinders, one of which is mounted above the shock part and pivotally connected to it by a rod, and the body with the hammer body, and the body of the second hydraulic cylinder is rigidly fixed laterally to the hammer body . Its height in height after the maximum extension of the rod does not extend beyond the corresponding size of the hammer case, while the piston cavities of the hydraulic cylinders are connected by a large cross-section pipe, and the rod cavities by channels with a control system made in the form of a combination of hydraulic accumulators fixed to the side of the hammer case torus, electro-hydraulic on-off spool with a fixed position of the pilot spool and two electrical limit switches. The working cavity of the hydraulic accumulator and the pressure channel of the on-off valve are connected to the pipeline supplying the working fluid from the hydraulic drive head when the hydraulic hammer is turned on, the drain and drainage channels of the on-off valve are connected to the drain line by the hydraulic drive, and the control channels of the valve are connected to the rod cavities hydraulic cylinders. 2 ill. fe

Description

The invention relates to the field of mechanization of the processes of destruction of rocks, oversized, frozen soils, pillars of concrete and metal, compaction of soils, immersion of piles, dowels and leaders, and is intended to provide pulsed force. .:

The aim of the invention is to expand operational capabilities.

Figures 1 and 2 show a hydraulic hammer.

The hydraulic hammer consists of tools placed in a single housing 1 (for example, peaks, headgear, leader, stamp, rams), a hammer 2 connected in the upper part to the rod of the hydraulic cylinder 3, hydraulic cylinder 4, the housing of which is fixedly fixed on the side hammer body surface. On the rod. Parallel to the housing, a guide 5 with stops 6 is rigidly fixed to turn on the electrical limit switches 7 and 8, also fixed on the housing

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of the electrohydraulic on-off distributor 9 with the fixed position of the pilot valve and the hydraulic fluid accumulator 10 (for example, hydropneumatic) located there. The piston cavities of the hydraulic cylinders 3 and 4 are interconnected by a pipeline and filled with it with an almost inelastic fluid. The rod cavities of these connected hydraulic cylinders are connected to the control channels of the electro-hydraulic on-off distributor 9, to the plate of which pressure and drain pipelines from the hydraulic system of the base machine (for example, a tractor, excavator, mining complex, self-propelled regiment installation, etc.) are connected . A hydraulic fluid accumulator is installed in front of the distributor in the pressure line of the system.

The operation of the hammer is as follows.

After the tool 1 is placed in a working position, for example, on peaks, on an oversized or collapsible pillar, on the pile head, by switching on the hammer from the base machine system, the working fluid is supplied to the hydraulic fluid accumulator 10 and the electro-hydraulic spool 9. Since its hammer is located before the hammer starts operation in the lower position, by means of the limit switch 8, the electro-hydraulic distributor 9 is immediately switched on to supply the working fluid to the rod cavity of the hydraulic cylinder: cylinder 4. Therefore, it starts lifting and withdrawing the hammer 2 from the tool 1. When the stopper b fixed on the guide 5 turns on the electric limit switch 7, the electro-hydraulic on-off valve 9 switches to supply pressure fluid to the rod cavity of the hydraulic cylinder 4 and drain it from the rod cavity of the hydraulic cylinder 3. Therefore the hammer 2 accelerates downward and strikes the instrument 1.

After the impact, the limit switch 8 is turned on and the cycle is repeated until the operator of the base machine turns on the supply of working fluid.

The system of reciprocating movement of the shock part and the control system of the hydraulic hammer can be made of standard elements, which greatly simplifies the manufacturing, maintenance and repair of hammers in comparison with Yuntan hammers. The absence of a rod extended upward when lifting the shock by 1.5 ... 2 m (see figure 2) reduces the technological height of the hammer, which significantly expands

its field of application (e.g., in cramped mining conditions and indoors);

Thus, the proposed technical solution allows to expand the operational capabilities of the hydraulic hammer.,.

Claims (1)

The claims A hydraulic hammer comprising a housing mounted therein with axial movement of the hammer, an associated hammer reciprocating system, a tool and a control system, characterized in that; that, in order to expand operational capabilities, the system of reciprocating movement of the hammer is made in the form of two hydraulic cylinders, one of the cylinders is mounted on the housing coaxially with the hammer and pivotally connected to it, the other hydraulic cylinder is mounted on the side surface of the housing, the piston cavities of the hydraulic cylinders are connected to each other, their rod cavities are connected to the control system, and the latter is made in the form of fixed on the side surface of the housing of the hydraulic accumulator, electro-hydraulic on-off slide valve with a fixed position of the pilot valve, two limit switches and a guide with stops, rigidly mounted on the rod of the second hydraulic cylinder for interactions with limit switches, the hydraulic accumulator and the on-off spool are connected to the rod cavities of the hydraulic cylinders, the drain and drain channels of the on-off the spool are connected to the drain line, and its control channels are connected to the rod cavities of the hydraulic cylinders.