Unlock instant, AI-driven research and patent intelligence for your innovation.

Oil inlet valve block and compound flow control multi-way valve

An oil inlet valve and oil inlet cavity technology, applied in the hydraulic field, can solve problems such as poor versatility of multi-way valves

Active Publication Date: 2014-05-14
ZHEJIANG HAIHONG HYDRAULIC TECH
View PDF5 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing multi-way valves are only suitable for one of the above-mentioned quantitative systems, negative flow systems or load sensing systems.
As we all know, there are many models of construction machinery products, and different models may use different hydraulic systems; in other words, the existing multi-way valves have the problem of poor versatility

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Oil inlet valve block and compound flow control multi-way valve
  • Oil inlet valve block and compound flow control multi-way valve
  • Oil inlet valve block and compound flow control multi-way valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Such as figure 1 and figure 2 As shown, the oil inlet valve block 1 includes an oil inlet valve body 1a, a throttle valve 1b and a control structure.

[0042] The oil inlet valve body 1a has an oil inlet chamber 1c, an oil return chamber 1d, a first load sensing chamber 1e and a negative flow feedback chamber 1f. The oil inlet valve body 1a is provided with an oil inlet port P1 connected with the oil inlet chamber 1c, an oil outlet port 1g connected with the oil inlet chamber 1c, an oil return port T1 connected with the oil return chamber 1d, and the first The load sensing port LS connected to the load sensing chamber 1e and the negative flow feedback port FK connected to the negative flow feedback chamber 1f. Specifically, the negative flow feedback chamber 1f is located between the oil inlet chamber 1c and the first load-sensing chamber 1e, and this arrangement structure is more conducive to the control of the control structure according to the oil pressure of the ...

Embodiment 2

[0064] The structure and principle of this embodiment are basically the same as that of Embodiment 1, the difference is that: Figure 14 to Figure 16 As shown, the composite control flow multi-way valve includes seven working valve blocks 2, one oil return valve block 3 and one oil inlet valve block 1; the oil inlet valve block 1 and the oil return valve block 3 are respectively located on both sides; in other words , press oil inlet valve block 1, first working valve block 2, second working valve block 2, third working valve block 2, fourth working valve block 2, fifth working valve block 2 from one side to the other side , the sixth working valve block 2, the seventh working valve block 2 and the oil return valve block 3 are stacked in sequence.

[0065] The oil pressure comparison structure of the shuttle valve includes six sets of shuttle valves 4, and a set of shuttle valves 4 is arranged between two adjacent working valve blocks 2; the shuttle valve 4 has two oil pressur...

Embodiment 3

[0070] The structure and principle of this embodiment are basically the same as that of Embodiment 1 or Embodiment 2, the difference is that: Figure 13 and Figure 17 As shown, when the oil inlet valve block 1 and the composite control flow multi-way valve are applied in the quantitative system, the load sensing interface LS and the negative flow feedback interface FK are blocked with the bolt plug 1n; and the throttle valve is removed 1b makes the negative flow feedback chamber 1f and the oil return chamber 1d straight through.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides an oil inlet valve block and a compound flow control multi-way valve and belongs to the field of hydraulic techniques. The problem that an existing multi-way valve is poor in universality is solved. The oil inlet valve block comprises an oil inlet valve body, wherein the oil inlet valve body is provided with a first load-sensitive cavity and a negative flow feedback cavity and is further provided with a load-sensitive interface communicated with the first load-sensitive cavity and a negative flow feedback interface communicated with the negative flow feedback cavity. The negative flow feedback cavity and an oil return cavity are communicated through a throttle valve or are directly communicated. A control structure for controlling whether an oil inlet cavity is communicated with the negative flow feedback cavity or not according to the oil inlet cavity oil pressure and the first load-sensitive cavity oil pressure is arranged in the oil inlet valve body. The compound flow control multi-way valve comprises at least two working valve blocks, an oil return valve block and the oil inlet valve block, adopts downstream pressure compensation and has a flow saturation resisting function, namely flows of execution elements can be distributed proportionally when the system flow is insufficient.

Description

technical field [0001] The invention belongs to the field of hydraulic technology, and relates to a hydraulic control valve, in particular to an oil inlet valve block. [0002] The invention belongs to the technical field of hydraulic pressure, and relates to a multi-way valve, in particular to a composite flow control multi-way valve. Background technique [0003] The multi-way valve adopts a unified modular design, which can provide reliable system solutions for manufacturers of engineering vehicles. Users can make different combinations of valve bodies according to functional requirements, which is simple and reliable. Therefore, multi-way valves are used in excavators, small loaders, backhoe loaders, drilling rigs, forklifts, mining machines, agricultural machinery and other fields. [0004] At present, the hydraulic systems used on construction machinery are mainly quantitative systems, negative flow systems or load sensing systems. However, the existing multi-way va...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/08F15B13/04F16K11/22
Inventor 何贤剑高军王军
Owner ZHEJIANG HAIHONG HYDRAULIC TECH