Load-sensitive proportional multi-way valve
A proportional multi-way valve and load-sensing technology, which is applied in the field of multi-way valves, can solve the problems of insufficient and compact structure of load-sensitive proportional multi-way valves, and achieve the effects of improving precision, superior operating performance and reducing volume
Pending Publication Date: 2020-08-04
JIANGSU KEMAI HYDRAULIC CONTROL SYST
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Problems solved by technology
However, the above-mentioned load-sensitive proportional multi-way valve lacks a closed loop of main spool displacement feedback, and the control accuracy and dynamic response can be further improved. In addition, the structure of the load-sensitive proportional multi-way valve is not compact enough, and the compactness of the structure can be further improved.
Method used
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[0040] Attached below Figure 1~10 The present invention is described in detail, and the following examples are used to illustrate the present invention, but are not used to limit the scope of the present invention.
[0041] The invention provides a load sensitive proportional multi-way valve, which comprises at least two valve blocks. see Figure 1~6 , the valve block includes a valve body 1 (usually a three-position four-way valve), and the valve body 1 is provided with a valve core chamber, an oil inlet 13 and an oil outlet 14, wherein the oil inlet 13 and the oil inlet in the valve body 1 The oil outlet 14 communicates with the oil outlet cavity in the valve body 1, and the main valve core 10 is arranged in the valve core cavity; one end of the valve body 1 is connected with a connecting block 1 by a screw, and the other end is fixedly connected with a Connection block 2 3 (that is, connection block 1 2, valve body 1 and connection block 2 3 are integrated into one);
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The invention discloses a load-sensitive proportional multi-way valve, relates to the technical field of multi-way valves, and particularly relates to the improvement of the load-sensitive proportional multi-way valve. The provided load-sensitive proportional multi-way valve is characterized in that accurate control over the position of main valve elements is achieved through double-end proportional electromagnets, pressure reducing valves and oil ways communicating with cavities in the two ends of the main valve elements, the load-sensitive proportional multi-way valve has excellent operation performance and comprises at least two valve blocks, the valve blocks comprises valve bodies, valve element cavities, oil inlet cavities and oil return cavities are formed in the valve bodies, the main valve elements are arranged in the valve element cavities, connecting blocks I are integrated at one ends of the valve bodies, connecting blocks II are integrated at the other ends of the valve bodies, displacement sensors and built-in amplifiers are fixedly sealed in protective covers, and the protective covers and the connecting blocks I are integrated. The valve is easy to assemble and disassemble, has the excellent operation performance, and improves the displacement precision of the main valve elements.
Description
technical field [0001] The invention relates to the technical field of multi-way valves, in particular to an improvement of a load-sensitive proportional multi-way valve. Background technique [0002] At present, the multi-way valve products used in construction machinery, construction machinery, petroleum machinery, mining machinery and ship machinery in the market all have the demand for upgrading, from the original ordinary multi-way valve to upgrade to load-sensitive multi-way valve, Even upgrade to a load sensing proportional valve. With the gradual intensification of competition in these industries, the increase of energy utilization efficiency, the need for environmental protection and the improvement of user's mechanical manipulation performance, the multi-way valve with load-sensitive proportional system has been widely praised. [0003] In order to meet the market demand for relatively higher-end load-sensing proportional valves, a load-sensing proportional valve ...
Claims
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Login to View More IPC IPC(8): F15B13/02F16K31/06F16K37/00
CPCF15B13/021F16K31/0603F16K37/0041
Inventor 陈奕泽全庆宇陈璐
Owner JIANGSU KEMAI HYDRAULIC CONTROL SYST