Small-sized drill pile-up valve

Abstract

This invention discloses a small-sized drill pile-up valve, which comprises a valve body. The small-sized drill pile-up valve is characterized in that: a reversing valve, an overloading valve and a balanced one-way throttle valve are arranged in the valve body; the valve cavity of the overloading valve and the valve cavity of the balanced one-way throttle valve are communicated with the valve cavity of the reversing valve through casting flow channels respectively; and the valve body is provided with a first oil port, a second oil port, a third oil port, a fourth oil port and a pressure gaugeport. The integrated control valve adopts an inserting mode, is organically fused and integrated with the reversing functions into a whole, has the advantages of compact structure, high working pressure, low loss of flow channel pressure, sensitive feedback, convenient operation, attractive appearance, and convenient maintenance. The small-sized drill pile-up valve is suitable for coal seam drilling machinery and small-sized drilling machinery for geological prospecting, is also suitable for small-sized engineering machinery, highway machinery, environmental health sanitation machinery, agricultural machinery and the like.

Description

technical field [0001] The invention belongs to components of a hydraulic control device, in particular to an integrated valve for a small drilling rig. It is a hydraulic combination valve that can be separately controlled by applying hydraulic technology to change the direction of oil movement, adjust the movement speed, and system pressure. It is mainly used in small drilling machinery for coal seam drilling and geological exploration, and is also suitable for small construction machinery, Road machinery, sanitation machinery, agricultural machinery, etc. Background technique [0002] The oil circuit control methods used by the existing small drilling rigs for coal seam drilling and geological exploration are; [0003] (1) Multi-way reversing valves are used to realize the conversion of oil movement direction and pressure control, and a one-way throttle valve is externally connected to the hydraulic system to realize the control requirements for the movement speed of the ...

AI Technical Summary

Problems solved by technology

[0003] (1) Multi-way reversing valves are used to realize the conversion of oil movement direction and pressure control, and a one-way throttle valve is externally connected to the hydraulic system to realize the control requirements for the movement speed of the actuator, resulting in complicated pipeline connections and large volume. Large and inconvenient to operate, increasing the possibility of external leakage

Most of the multi-way reversing valves use direct-acting relief valves or pilot-operated relief valves to adjust and control the working pressure. The use of direct-acting relief valves has poor opening and closing characteristics, large power loss, and serious system heating.

If the conventional pilot relief valve is used, since the fixed damping hole is only Φ0.8mm, it is easy to cause blockage and cause the system to fail, the anti-pollution ability is poor, and the system reliability is reduced.

[0004] (2) The manual valve is externally connected to the overflow valve and the one-way throttle valve control method, and its external pipelines are more than the first method above, and the reliability is low

[0005] (3) The working pressure of the existing multi-way reversing valve or manual valve is below 21Mpa

And it is an old-fashioned structure designed many years ago (such as ZS series multi-way valve and 34S-L※H series manual valve), which makes it difficult to control the reversing operation, the sealing design of the slide valve is not good, and oil leakage occurs from time to time

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