Oil cylinder assembly and full-automatic two-way pressurizing hydraulic brick press with same

Abstract

The invention discloses an oil cylinder assembly and a full-automatic two-way pressurizing hydraulic brick press with the same. The oil cylinder assembly is a lower oil cylinder used in cooperation with an upper oil cylinder. As part of a brick press body, the oil cylinder assembly and a hydraulic control system form the full-automatic two-way pressurizing hydraulic brick press. According to the oil cylinder assembly and the full-automatic two-way pressurizing hydraulic brick press provided with the same, the structure is simple, the performance is stable, and the production efficiency is high; the lower oil cylinder is of a large and small plunger structure, capable of achieving quick and slow control over a lower moving beam under the condition of small pressure oil supply amount by being provided with a filling valve, little in leakage and small in energy consumption; the lower oil cylinder drives a lower pressing head, so that powder in a middle mold frame can be pressurized from bottom to top, and compression-molded green bricks can be ejected from the middle mold frame.

Description

technical field [0001] The invention belongs to the technical field of press-formed wall material production, in particular to an oil cylinder assembly and a full-automatic two-way pressure hydraulic brick pressing machine. Background technique [0002] At present, the domestic mainstream wall material production equipment can be divided into vibration forming and pressing forming according to the raw material forming. Vibration molding is mostly used for concrete block products, while compression molding is mostly used to produce wall material products based on powder raw materials. At present, the most common pressing method of a kind of press in the market is pull-down pressing, also known as forced pressing. For example, the invention patent of CN101195237.1 discloses a two-way pressing mechanism of a brick press, and its pressing mode is Pull-down pressing generally includes an upper fixed beam, a lower fixed beam, a guide column and a power mechanism. The main points ...

AI Technical Summary

Problems solved by technology

Pull-down pressing has two major technical disadvantages: one is that the pressure distribution in the adobe is not uniform, layered cracking will occur, and cracks may occur during operation, which is not convenient for steam curing or sintering; the other is that this pressing method is not convenient for porous In the production of bricks, since the porous brick mold core needs to be fixed, and the pressing distance of the upper mold core is long, the mold core must bear a large friction force during the pressing process. When the friction force is greater than the strength limit of the mold core, There may be a phenomenon that the mold core is broken. If it is not found in time, it may further damage the entire mold box and cause greater losses.

In the pressing and pressurizing stage of the brick press, the working pressure of the hydraulic system can reach up to 31.5MPa, and the flow demand is small. If the quantitative pump is used, a large amount of high-pressure oil will flow back to the oil tank from the overflow valve, causing the temperature of the oil to rise. The hydraulic system The energy efficiency is not high, and the slide valve is more prone to leakage

[0004] The lower oil cylinder of the existing two-way pressurized hydraulic brick press mostly uses an ordinary single-rod piston cylinder, and the flow rate of the pressure oil entering the oil cylinder is controlled by the flow control valve to control the movement speed of the piston rod. The bore of the lower cylinder is very large, and the pressure oil flow required for the fast movement of the driving cylinder is very large. When using an ordinary piston cylinder, it must be equipped with a large-displacement hydraulic pump and a large-flow hydraulic control valve. These inevitably The volume of the hydraulic system is large, the leakage increases, and the energy consumption is too high

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