A hydraulic prop double injection system
A hydraulic prop and double-injection technology, which is applied in props/supports, mining equipment, earthwork drilling and mining, etc., can solve problems such as easy bruising, reset of the middle cylinder, and affecting the working life of hydraulic props, so as to solve the difficulty of handling and ensure The effect of service life
Active Publication Date: 2016-01-20
江苏闽达重工科技有限公司
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Problems solved by technology
However, for two-stage or multi-stage props, when resetting, the return spring generally cannot fully reset the middle cylinder, and there will be 100mm-150mm protruding out of the hydraulic prop, and the protruding middle cylinder is easily deformed by force during transportation. The surface of the cylinder is also easy to be scratched, which affects the working life of the hydraulic prop
Method used
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[0011] The present invention will be further described below in conjunction with accompanying drawing.
[0012] Such as figure 1 , figure 2 and image 3 As shown, a hydraulic prop double injection system of the present invention includes a live column 1, a middle cylinder 2, a middle cylinder 2 3, a three-purpose valve seat 4 for a rising column, a three-purpose valve for a rising column 5, a channel for lifting a column 6, and an oil cylinder 7 and the piston 8 and return spring of the middle cylinder two; the live column 1 is set in the middle cylinder one 2, the middle cylinder one 2 is set in the middle cylinder two 3, and the middle cylinder two 3 is set in the oil cylinder 7 inner chamber; the lifting column three The lower end of the valve seat 4 is connected to the oil cylinder 7 through a steel wire, and the upper end is slidably sealed with the middle cylinder 2 3. The three-purpose valve 5 for the rising column is assembled on the three-purpose valve seat 4 for t...
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The invention discloses a hydraulic support column double-liquid-injection system which comprises a column return passage (9), a column return three-use valve (10), a column return three-use valve seat (11), and a remote liquid-injection system. A column lifting passage (6) is formed in an inner passage of an oil cylinder (7). The upper portion of the column return three-use valve seat (11) is in slide seal with a second middle cylinder (3). The lower portion of the column return three-use valve seat (11) is connected with the oil cylinder (7). The column return three-use valve (10) us assembled in the column return three-use valve seat (11). The column return passage (9) is disposed in a passage between the outer wall of the second middle cylinder (3) and the inner wall of the oil cylinder (7) and communicated with the end face of a piston (8) of the second middle cylinder. The remote liquid-injection system comprises a three-way valve (12), a high-pressure rubber pipe (13), a liquid-injection nozzle (14) and an unloading device (15). By the column return passage, the middle cylinder of a two-stage support column or a multi-stage support column can reset completely, the problems of carrying difficulty and easy middle cylinder scratch which are caused by incomplete column return are solved effectively, and the service lives of the hydraulic support columns are guaranteed.
Description
technical field [0001] The invention relates to a mine support equipment, in particular to a double liquid injection system of a hydraulic prop. Background technique [0002] The single hydraulic prop is one of the main supporting equipment in the mining industry, mainly used in underground roadway support and coal mining face support. At present, the single hydraulic prop is mainly composed of a live column, a middle cylinder, a return spring, a three-purpose valve, and an oil cylinder. During work, the three-purpose valve is used to inject liquid into the oil cylinder, and the oil cylinder lifts the middle cylinder, and the middle cylinder drives the movable column. To work, when unloading, first return to the live column and then return to the middle cylinder; when resetting, it mainly relies on the return spring to reset, and the reset sequence of the pillar is: first the live column is reset, and then the middle cylinder is reset. However, for two-stage or multi-stage ...
Claims
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IPC IPC(8): E21D15/44E21D15/51
Inventor 武文成
Owner 江苏闽达重工科技有限公司