Hydraulic lock system

Abstract

The invention discloses a hydraulic lock system which comprises a filter, a hand stop valve, a reducing valve, a solenoid directional valve, a pneumatic operated directional valve, a first gas-liquid booster pump, a pressure transmitter and hydraulic lock oil cylinders. The filter, the hand stop valve and the reducing valve are connected with the first gas-liquid booster pump through an instrument air pipeline. The pneumatic operated directional valve, the pressure transmitter and the hydraulic lock oil cylinders are connected with the first gas-liquid booster pump through a hydraulic oil pipeline. The solenoid directional valve is connected to a pipeline between the instrument air pipeline and the hydraulic oil pipeline. The hydraulic lock oil cylinders are mounted around a water chamber of a granulating crusher in an evenly distributed mode. By means of the hydraulic lock system, labor intensity is lowered for operators, and the quick lock function between the water chamber and a formwork can be achieved fundamentally; moreover, the hydraulic lock system is constant in lock pressure, safe, reliable, simple, light and handy, and convenient to install, check and maintain, saves energy and protects the environment.

Description

technical field [0001] The invention relates to a hydraulic locking system. Background technique [0002] In the prior art, the mixing extrusion granulation unit is one of the most important equipments for ethylene engineering in the petrochemical industry, and the locking of the underwater granulation water chamber and the head template is the key device of the mixing extrusion granulation unit , whether it can achieve fast locking, the size of the locking force, and whether it can achieve reliable locking is one of the necessary safety conditions for the normal operation of the unit. The water chamber here is filled with tens to hundreds of cubic meters of water per hour. Process water (de-salted water, etc.), the water pressure is 0.2-0.65MPa, the water temperature is generally 40-80°C, and the polyolefin polymer melt is extruded from the granulation belt of the template at several tons to dozens of tons per hour (The temperature is about 250°C), the cutter of the granul...

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Problems solved by technology

[0002] In the prior art, the mixing extrusion granulation unit is one of the most important equipments for ethylene engineering in the petrochemical industry, and the locking of the underwater granulation water chamber and the head template is the key device of the mixing extrusion granulation unit , whether it can achieve fast locking, the size of the locking force, and whether it can achieve reliable locking is one of the necessary safety conditions for the normal operation of the unit. The water chamber here is filled with tens to hundreds of cubic meters of water per hour. Process water (de-salted water, etc.), the water pressure is 0.2-0.65MPa, the water temperature is generally 40-80°C, and the polyolefin polymer melt is extruded from the granulation belt of the template at several tons to dozens of tons per hour (The temperature is about 250°C), the cutter of the granulator rotates at a speed of several hundred revolutions per minute to granulate, so the sealing of the end face here and the locking of the water chamber and the template are particularly important, because if there is leakage Leakage and leakage, a large amount of hot water spraying and pouring will cause equipment and personal safety accidents, which will cause the entire granulation line and even the upstream and downstream equipment to stop production, resulting in huge economic losses. Usually, the locking of the water chamber and the formwork here is manual. The advantages and disadvantages of manual locking and interlocking rotary (pressure cooker) are as follows: the manual locking method can be used on small machines, and two operators are required to operate manually on both sides; however, due to the The temperature of the body is high, about 200°C and above, which is dangerous; moreover, during the start-up process of a large-scale extrusion granulation unit, the locking time between the template and the water chamber should be as short as possible to avoid flow out of the template. Too much material will cause the phenomenon of knife wrapping; tooth insert rotary locking, its structure is similar to that of the lid and body of the pressure cooker, and its rotational power comes from the cylinder or oil cylinder, which solves the labor intensity problem of the operator; but Its structural components are bulky and heavy

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