Shovel plate lifting hydraulic control integrated valve block and continuous coal cutter

Abstract

The invention discloses a shovel plate lifting hydraulic control integrated valve block. The shovel plate lifting hydraulic control integrated valve block comprises a valve body, the valve body is internally provided with an interconnected first oil channel and second oil channel, the two ends of the first oil channel respectively form a port A and a port C1 on the valve body, the two ends of thesecond oil channel form a port P and a port T respectively on the valve body, the first oil channel communicates with a sequential valve, an oil inlet of the sequential valve communicates with the port A, and an oil outlet of the sequential valve communicates with the port C1, the communication position of the first oil channel and the second oil channel is located between the sequential valve andthe port C1, the second oil channel successively communicates with a pressure reducing valve, a one-direction valve and an adjustable throttle valve from the port P to the port T, the oil inlet of the pressure reducing valve communicates with the port P and the oil outlet of the pressure educing valve communicates with the oil inlet of one-direction valve, the oil outlet of the one-direction valve communicates with the adjustable throttle valve, and the communication position of the first oil channel and the second oil channel is located between the one-direction valve and the adjustable throttle valve.

Description

technical field [0001] The invention relates to a continuous coal mining machine, in particular to a shovel plate hydraulic control integrated valve block of the continuous coal mining machine. Background technique [0002] At present, in the field of hydraulic drive and control technology, people have focused their attention on: aiming at integration, high efficiency and high cost performance, creating and possessing competitive products as a new development strategy. [0003] Usually, when controlling the lifting height of the shovel in the continuous miner, a typical and common hydraulic cylinder such as a single-rod double-acting cylinder is used for control, but when the double-acting cylinder is used to control the lifting of the shovel, the shovel of the continuous miner is required The height of the plate can be safely locked to receive goods. The locomotive workers need to pay attention to the height of the shovel plate at all times, and constantly adjust it accordi...

AI Technical Summary

Problems solved by technology

[0003] Usually, when controlling the lifting height of the shovel in the continuous miner, a typical and common hydraulic cylinder such as a single-rod double-acting cylinder is used for control, but when the double-acting cylinder is used to control the lifting of the shovel, the shovel of the continuous miner is required The height of the plate can be safely locked to receive the goods. The locomotive needs to pay attention to the height of the shovel plate at all times, and constantly adjust it according to the needs, which makes the spirit of the locomotive worker always in a tense state when working, which greatly increases the labor intensity of the workers.

[0004] When the single-acting single-rod oil cylinder is in use, the oil rod extends out when the oil is supplied, and the oil supply is stopped to close the oil inlet pipeline to ensure that the blade height of the continuous mining machine is locked, which greatly reduces the labor intensity of the locomotive, but in actual use Among them, the single-acting single-rod cylinder is prone to rapid drop of the blade when the oil return circuit is opened. If the speed is too fast during the descent, it will produce impact and damage the blade. Therefore, single-acting single-rod is used for continuous miners. The movement of the scraper controlled by the oil cylinder has put forward special requirements. It is necessary to install a hydraulic integrated valve block in the hydraulic control system of the scraper that can realize the safety self-locking of the scraper and the oil return backup pressure buffer function to meet the requirements of the scraper control. Action requirements in the system make the overall installation simple and convenient

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