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Digital valve unit and combination and control method thereof

A digital valve, valve block technology, applied in multi-port valves, valve devices, engine components, etc., can solve the problems of low flow resolution, unable to meet the flow resolution and accuracy requirements, etc., to achieve flexible control, improve control performance, Control simple effects

Active Publication Date: 2016-03-23
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Conventional on-off valves only have two states of "open" and "closed", so the flow resolution is low, which cannot meet the requirements for high flow resolution and accuracy.

Method used

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  • Digital valve unit and combination and control method thereof
  • Digital valve unit and combination and control method thereof
  • Digital valve unit and combination and control method thereof

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0034] Such as figure 1 As shown, the present invention provides a digital valve unit: including a valve block 1, a plurality of on-off valves 2, an oil outlet pressure sensor 3-1, an oil inlet pressure sensor 3-2, a valve block oil inlet 6, a valve block oil outlet 7,

[0035] Such as figure 2 As shown, the switch valve 2 is inserted on the valve block 1 in the form of threaded connection; there are two layers of oil passages inside the valve block 2, and the valve block 2 is provided with a valve block oil outlet 7 and a valve block oil inlet 6 , the oil inlet 6 of the valve block is connected to the lower oil passage inside the valve block, the oil outlet 7 of the valve block is connected to the upper oil passage inside the valve block, the pressure sensor 3-1 of the oil outlet is connected to the upper oil passage, and the oil inlet The pressure...

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Abstract

The invention discloses a digital valve unit and a combination and control method thereof. The digital valve unit comprises a valve block, multiple switch valves, an oil outlet pressure sensor, an oil inlet pressure sensor, a valve block oil inlet and a valve block oil outlet, and a digital valve combination unit is formed by connecting multiple digital valve units. All switch valve oil inlets are communicated with a lower layer oil channel inside the valve block, and all switch valve oil outlets are communicated with an upper layer oil channel inside the valve block. By means of the digital valve unit and the assembly and control method thereof, valve sets can be increased or decreased according to working conditions through quick-change connectors or bolted connection, control is more flexible to conduct, and more energy is saved. Through combination utilization of the switch valves with the multiple relation being that the valve port open area is multiplied by two, high-resolution output of needed flow and accurate control over the load backpressure are achieved. Through combination utilization of the high-speed switch valves, it is guaranteed that when a single cartridge valve is broken down, only the cartridge valve which is broken down needs to be replaced, it is not needed to replace the whole digital valve combination unit, therefore the maintenance cost and replacement cost are greatly lowered, and production cost is greatly lowered accordingly.

Description

technical field [0001] The invention relates to a digital valve unit and its combination and control method. Background technique [0002] Electro-hydraulic proportional control technology is an important branch of electro-hydraulic control technology. It has developed rapidly in the past 30 years and has been widely used in civil machinery, engineering machinery, military industry and other fields. The proportional valve can control the displacement of the spool according to the voltage value input by the user, output the flow of the corresponding value, and realize the output control of the flow analog quantity with high precision. But the structure of the proportional valve is complicated, the control is difficult, the price is high, and there are disadvantages such as the median dead zone and the sensitivity to oil pollution. Therefore, seeking a hydraulic valve with simple structure, convenient control and strong anti-pollution to replace the proportional valve with ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K11/22F15B13/02
CPCF15B13/02F16K11/22
Inventor 张斌钟麒马吉恩洪昊岑牛明杰杨华勇
Owner ZHEJIANG UNIV
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