Load holding valve and engineering machinery
A load holding valve and holding valve technology, applied in mechanical equipment, fluid pressure actuation devices, servo motor components, etc., can solve the problems of poor anti-pollution ability, stuck, and high cost
Active Publication Date: 2021-07-16
CHANGDE ZHONGLIAN ZHONGKE HYDRAULIC
View PDF8 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] Although this kind of load holding valve can keep the boom at the desired height position, as mentioned above, the structure inside the end cover of the holding valve is complicated and the cost is high. In addition, the clearance between the push rod, ejector rod, valve sleeve, etc. is small , there is a risk of jamming, and the anti-pollution ability is poor
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0026] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0027] refer to figure 1 and image 3 , The load holding valve 30 provided by the specific embodiment of the present invention includes a valve body 1, a positioning plug 6 and a holding valve core 8, wherein the valve body 1 includes a load port 2, a holding channel 3, a multi-way valve cavity 4 and a communication channel 5 , wherein the communication channel 5 communicates the load port 2 with the multi-way valve cavity 4, and the maintenance channel 3 communicates with the communication channel 5; the positioning plug 6 is blocked in the maintenance channel 3, and the positioning plug 6 is formed with a first oil channel 7 , wherein the first oil passage 7...
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
Login to View More Abstract
The invention relates to the technical field of load holding, and discloses a load holding valve and engineering machinery. In the load holding valve, a load port and a multi-way valve cavity communicate through a communicating channel; a holding channel communicates with the communicating channel; a positioning plug is arranged in the holding channel in a plugging manner; a first oil channel has a through-flow state and a cut-off state; a holding valve element can be movably assembled in the holding channel, and is positioned between the positioning plug and the communicating channel; a pressure applying cavity communicates with the communicating channel through the second oil channel; the first oil channel communicates with the pressure applying cavity; a valve port positioned on a moving path of the holding valve element is formed in the communicating channel; when the first oil channel is in the cut-off state, the holding valve element can stretch out, so that the valve port can be plugged by a plugging head of the holding valve element and then the flow in the communicating channel can be cut off; and when the first oil channel is in the through-flow state, the holding valve element can retract, so that the valve port can be opened by the plugging head and then the flow in the communicating channel can be enabled. The load holding valve is simple in structure, low in cost, and capable of stably and reliably achieving the load holding function.
Description
technical field [0001] The invention relates to the technical field of load holding, in particular to a load holding valve and an engineering machine. Background technique [0002] During the actual operation of the excavator, the boom may need to be kept at a desired height due to actual needs. At this time, the boom cylinder needs to be stretched out and bear the load applied by the boom. [0003] In the prior art, there is a load holding valve for a boom. The load holding valve is composed of a boom control block and a holding valve end cover. The boom control block includes a main valve core of the holding valve, a return spring and a gasket. The retaining valve end cover includes parts such as push rod, push rod return spring, ejector rod, valve sleeve and plunger. When not in operation, the oil in the large chamber of the boom communicates with the spring chamber of the main spool of the holding valve, preventing the oil from passing through the main spool of the hold...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02F15B21/00
CPCF15B13/02F15B21/00
Inventor 李林岩罗炎热
Owner CHANGDE ZHONGLIAN ZHONGKE HYDRAULIC