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A dual-channel thousand-liter high-flow reversing valve

A large-flow, dual-channel technology, applied in mining equipment, earthwork drilling, pillars/supports, etc., can solve the problem that the reversing valve is not suitable for high-pressure, thousand-up and large-flow conditions, and achieve small hydraulic power and flexible and reliable movements , the effect of reducing flow resistance

Active Publication Date: 2017-01-18
TAIYUAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the existing reversing valve structure is not suitable for high-pressure, thousand-up and large-flow conditions, the present invention provides a dual-channel, thousand-up, high-flow reversing valve

Method used

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  • A dual-channel thousand-liter high-flow reversing valve
  • A dual-channel thousand-liter high-flow reversing valve

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Experimental program
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Embodiment Construction

[0015] Such as figure 1 , a double-channel thousand-upgrade high-flow reversing valve, including a valve body 1, a liquid inlet valve sleeve 2, a valve seat 3, a liquid return valve core 4, a liquid return valve sleeve 5, a liquid intake valve core 6, and a return spring 7 , metal retaining ring 8, sealing ring 9,10, screw plug 11. Inside the valve body, there is a double-sided symmetrical liquid supply main channel P that supplies liquid to the valve core. Symmetrical liquid return channel O, one end of the two-sided liquid return channel communicates through the auxiliary flow channel. Symmetrical dual channels reduce the radial unbalanced force of the spool and solve the problem of reversing hysteresis and deflection wear of large flow reversing valves.

[0016] The valve sleeve includes a liquid inlet valve sleeve 2 and a liquid return valve sleeve 5. The valve core includes a liquid inlet valve core 6 and a liquid return valve core 4. The liquid inlet valve core 6 is i...

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Abstract

The invention belongs to a reversing valve for controlling a hydraulic system of a hydraulic support, in particular to a double-channel, thousand-up, high-flow, reversing valve, which solves the problem that the existing reversing valve structure is not suitable for high-pressure, thousand-up, and large-flow working conditions. Inside the valve body, there are double-sided symmetrical main liquid supply channels that supply liquid to the valve core. Symmetrical return channel. The left end of the liquid inlet spool is provided with a hydraulic balance end face and a hydraulic control end face, and a hydraulic balance oil circuit and a hydraulic control oil circuit are correspondingly provided inside the valve body and the liquid return valve sleeve. The invention overcomes the deflection force caused by the asymmetry of the flow field of the traditional reversing valve, avoids the phenomenon of hysteresis, wear and failure of the reversing valve that occurs when the thousand-level high-flow reversing valve returns to its position, and reduces the sealing between the valve core and the valve seat. Surface contact stress; overcome the instability of the traditional cone valve; reduce the pressure loss.

Description

technical field [0001] The invention belongs to a reversing valve for controlling a hydraulic system of a hydraulic support, in particular to a dual-channel, thousand-upgrade, high-flow reversing valve. Background technique [0002] At present, with the increase of coal seam thickness, the demand for large mining height hydraulic support increases correspondingly, the oil cylinder increases and thickens, and the flow rate of the existing DN12 and DN20 reversing valves is small, which will inevitably bring about the problem of slow movement of the support. High pressure and large flow Hydraulic components have become a major development trend. At present, the user market has a strong demand for the thousand-up reversing valve for brackets, but there is no such product at home and abroad. Existing problems of the existing DN12 and DN20 reversing valves: 1. The inside of the valve body adopts single-channel and one-side liquid supply. The disadvantage is that this structure w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D23/16E21D15/51
Inventor 廖瑶瑶廉自生王登辉袁红兵郭永昌马树新李优
Owner TAIYUAN UNIV OF TECH
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