Hydraulic support column double-liquid-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, middle cylinder reset, deformation, etc., and achieve the effect of ensuring service life and solving difficult handling
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[0011] The present invention will be further described below in conjunction with the drawings.
[0012] Such as figure 1 , figure 2 with image 3 As shown, a hydraulic prop dual injection system of the present invention includes a movable column 1, a middle cylinder 1, a middle cylinder 2, a valve seat 4 for lifting a column, a valve 5 for a lifting column, a column passage 6, a cylinder 7 and the piston 8 of the middle cylinder two; the movable column 1 is set in the middle cylinder 1-2, the middle cylinder 1-2 is set in the middle cylinder two and 3, and the middle cylinder two and 3 are set in the inner cavity of the oil cylinder 7; 4 The lower end is connected with the oil cylinder 7 by a steel wire, and the upper end is slidingly sealed with the middle cylinder 2 and 3. The column lifting valve 4 is assembled on the lifting column valve seat 5, and it also includes the column return channel 9, the column return valve 10, and The column three-purpose valve seat 11 and the r...
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