Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Double-injection double-seal pressure-display memory type single hydraulic prop

A single hydraulic prop, double liquid injection technology, used in props/supports, mining equipment, earth-moving drilling and other directions, can solve the problems of easy damage to the sealing surface, leakage, and high sealing failure rate, so as to improve wear resistance and The effect of surface hardness, reduced possibility of damage, and reduced maintenance effort

Active Publication Date: 2013-01-16
XUZHOU SANHE MACHANICAL PARTS
View PDF8 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The existing suspension type and double telescopic single hydraulic props are sealed with the outer surface of the live column and the middle cylinder, the sealing surface is easily damaged, and the sealing failure rate is high, which increases the capital investment for maintenance and replacement
[0004] 2. The dynamic seals of various single hydraulic props, including the single telescopic type, all adopt single-channel seals, and the sealing surface is narrow, which is easy to cause liquid leakage and affect the safety support performance of the props
[0005] 3. The existing various single hydraulic props have no pressure display, and the change of the pressure on the props cannot be observed and monitored. This is also the biggest safety hazard when using single hydraulic props for support.

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
  • Double-injection double-seal pressure-display memory type single hydraulic prop
  • Double-injection double-seal pressure-display memory type single hydraulic prop
  • Double-injection double-seal pressure-display memory type single hydraulic prop

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] The present invention will be further described below in conjunction with drawings and embodiments.

[0031] Such as figure 1 As shown, the double-injection double-sealed pressure-memory hydraulic prop for mining includes an outer cylinder 44, a middle cylinder 32, and a live column 31. The handle body dustproof ring 8, the handle body guide ring 10 and the handle body one-way sealing ring 33, the handle body sealing anti-extrusion ring 34 are installed on the upper end of the outer cylinder 44.

[0032] The upper end of middle cylinder 32 is equipped with handle 25 through handle seal ring 6 and handle connection steel wire 7, handle dustproof ring 22, handle guide ring 5 and handle one-way seal ring 23, handle seal anti-extrusion ring 24 , the lower end is provided with a middle cylinder piston 41; the middle cylinder piston 41 lower end cooperates with the inner surface of the outer cylinder 44 through the middle cylinder piston guide ring 18, the middle cylinder pi...

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 discloses a double-injection double-seal pressure-display memory type single hydraulic prop, which belongs to the technical field of hydraulic props. A multi-purpose valve seat (27) for assembling a multi-purpose valve (29) is additionally arranged on a middle upper part of a middle cylinder (32), and a plunger liquid passing hole (35) is arranged on a plunger body above a plunger piston (38); two sealing rings are respectively arranged on each sliding sealing part of the prop; and a pressure-display meter (29-1) with a memory function is arranged on the multi-purpose valve (29) or on a handle body (9) and the multi-purpose valve seat (27). Even if the outer surface of the middle cylinder or the plunger is damaged to cause failure in seal, the prop can be used normally; liquid leakage is avoided under the condition that an axial continuous damaged length of a seal surface does not exceed a double-seal clearance range; and the pressure change and the liquid leakage of the prop can be observed and known timely, so that problems can be found and solved conveniently in time, and the safety of prop supporting is improved.

Description

technical field [0001] The invention relates to the technical field of hydraulic props, in particular to a single hydraulic prop used for supporting underground mining working faces. Background technique [0002] Single hydraulic props for roof support of underground mining working face mainly include three types: single telescopic type, suspension type and double telescopic type. The single telescopic pillar, because of the small stroke of the pillar and the limited support range, will increase the reserve of pillars of different specifications and the number of replacements, increase the labor intensity of workers, and affect production efficiency. Therefore, the pillars currently used in mines are mainly Suspended and double telescoping struts. After the analysis of the existing technology and the investigation of the field use, it is found that there are still some individual and common problems in the existing single hydraulic prop, such as: [0003] 1. The existing ...

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): E21D15/44
Inventor 赵士民
Owner XUZHOU SANHE MACHANICAL PARTS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products