Combined control valve

A combined control and control port technology, which is applied in the direction of servo motor components, fluid pressure actuators, mechanical equipment, etc., can solve the problem of increasing the flow rate of the column hydraulic control check valve, increasing the flow rate of the main control reversing valve, and increasing the cost. Major and other issues

Active Publication Date: 2011-05-25
BEIJING TIANMA INTELLIGENT CONTROL TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the flow rate of the hydraulic control check valve is limited by the main control reversing valve (operating valve). To realize the functions of quickly lowering and raising the column, it is necessary not only to increase the flow rate of the hydraulic control check valve of the column, but also to increase the flow rate of the main control valve. The flow rate of the reversing valve, and increasing the flow rate of the main control reversing valve will significantly increase the cost

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0024] See attached figure 1 , which describes a preferred embodiment of the invention.

[0025] A combination control valve includes a reversing valve core 3, a reversing valve core 4, a hydraulic control check valve core 1 and a hydraulic control check valve core 2, and the hydraulic control check valve core 1 and the hydraulic control check valve core 2 The control port is connected to the control port of the hydraulically controlled one-way spool of the combined control valve, the control ports of the reversing spool 3 and 4 are connected to the control port of the reversing spool of the combined control valve, and the control port of the hydraulically controlled one-way spool 2 The liquid inlet end is connected to the liquid return path R through the quick bypass liquid return port of the combined control valve, the liquid outlet is connected to the rodless chamber of the hydraulic cylinder through the working port of the combined control valve, and the liquid inlet end o...

Embodiment 2

[0029] See attached figure 2 , which discloses another preferred embodiment of the present invention.

[0030] A combined control valve includes a reversing valve core 3, a reversing spool 4, a hydraulically controlled one-way valve core 1 and a hydraulically controlled one-way valve core 2, and the control ports of the reversing valve core 3 and the reversing valve core 4 are respectively connected The reversing spool control ports A and A' of the combined control valve, the control ports of the hydraulic control check spool 1 and the hydraulic control check spool 2 are respectively connected to the check spool control ports B' and B of the combined control valve, The liquid outlets of the hydraulic control check valve core 1 and the hydraulic control check valve core 2 are respectively connected to the two combined control valve working ports D and D' of the combined control valve, and the liquid inlet port of the reversing valve core 3 and the reversing valve The liquid i...

Embodiment 3

[0037] See attached image 3 , which discloses another preferred embodiment of the present invention.

[0038] The difference from Embodiment 2 is that the combined control valve only controls one hydraulic cylinder. Therefore, it is sufficient to set only one control port of the one-way spool and one working port of the combined control valve, and the liquid outlets of the two hydraulically controlled one-way spools are connected to the hydraulic cylinder through the working port of the combined control valve at the same time. Its specific working mode is similar to that of the combined control valve in Embodiment 2.

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PUM

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Abstract

The invention discloses a combined control valve, which comprises more than two hydraulic control one-way valve cores and more than two change valve cores, wherein control openings of the change valve cores are connected with a change valve core control opening of the combined control valve; liquid inlets of the change valve cores are connected with a liquid inlet of the combined control valve, and liquid return openings of the change valve cores are connected with a liquid return opening of the combined control valve; control openings of the hydraulic control one-way valve cores are connected with a one-way valve core control opening of the combined control valve; liquid discharge ends of the hydraulic control one-way valve cores are connected with a working opening of the combined control valve; a liquid inlet end of the at least one hydraulic control one-way valve core is connected with a working opening of the at least one change valve core; and the working openings of all change valve cores are connected with the liquid inlet end of the at least one hydraulic control one-way valve core.

Description

technical field [0001] The invention relates to a combined control valve, in particular to a combined control valve which integrates a reversing valve and a hydraulically controlled one-way valve for a hydraulic support. Background technique [0002] As the core component of the support hydraulic system, the column hydraulic control check valve is one of the key hydraulic components to ensure that it can effectively support the roof. The structure of large flow column check valve has direct acting type, side guiding type and two-stage opening type. The structure of the direct-acting column check valve is simple. Generally, the traditional hydraulic control check valve has this structure. The flow rate of this hydraulic control check valve is generally not very large, and the nominal pressure cannot be too high, because the impact of this structure is relatively large. Although some measures have been taken to reduce the impact in the process of lowering the column, such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02
Inventor 韦文术宋艳亮刘晓萌王伟王巍
Owner BEIJING TIANMA INTELLIGENT CONTROL TECH CO LTD
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