CN215761732U

CN215761732U - Anti-impact energy absorber for hydraulic support

Info

Publication number: CN215761732U
Application number: CN202122399684.5U
Authority: CN
Inventors: 李明飞; 徐永强; 郑子淦; 禹果; 包更传; 杨培海; 钟博
Original assignee: Zhengzhou Fengsen Machinery Co ltd
Current assignee: Zhengzhou Fengsen Machinery Co ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-02-08
Anticipated expiration: 2031-09-30

Abstract

The utility model provides an anti-impact energy absorber for a hydraulic support, which relates to the technical field of roadway support equipment, and comprises the following components: the cylinder barrel and the installation respectively at the last cylinder cap and the lower cylinder cap of cylinder barrel top and bottom, the safety valve that is linked together rather than inside is installed to outer wall one side bottom of cylinder barrel, the installation of cylinder barrel both ends respectively with last cylinder cap and lower cylinder cap fixed connection's first spacing post, the inside movable mounting of cylinder barrel has lower piston and last piston that slides along first spacing post outer wall single degree of freedom, the top of lower piston and last piston is fixed mounting respectively has and is used for preventing dashing first elastic energy-absorbing spare and second elastic energy-absorbing spare that absorbs energy. Can press in hydraulic support again with inside whole liquid of cylinder, in time resume hydraulic prop's the support resistance, ensure the stable in structure of tunnel country rock.

Description

Anti-impact energy absorber for hydraulic support

Technical Field

The utility model relates to the technical field of roadway support equipment, in particular to an anti-impact energy absorber for a hydraulic support.

Background

Under the conditions of high ground stress and complex geological environment, roadway rock burst disasters are gradually increased and released energy is gradually increased, a hydraulic support becomes support equipment commonly used for deep rock burst roadways, but strong shock waves generated by deep mining rock burst are transmitted to the roadway hydraulic support by surrounding rocks to generate strong instantaneous dynamic pressure on the hydraulic support, hydraulic pillars on the conventional common hydraulic support are limited in liquid discharge speed and flow rate due to safety valves and cannot be quickly opened in a very short time, liquid is quickly discharged, so that the pressure of the hydraulic pillars exceeds a limit value in a short time, the phenomena of breakage such as buckling, thickening, bursting, breaking and the like of the pillars occur, finally the roadway is deformed and damaged, even collapses and damaged, and serious casualties and property loss are caused, and at present, the impact energy is absorbed by energy absorption boxes arranged on top beams or the hydraulic pillars of the hydraulic supports, prevent the hydraulic support from being damaged due to dynamic load impact.

The Chinese patent with the publication number of CN113074007A discloses an anti-impact energy absorber for a hydraulic support, which comprises an upper cylinder cover, a cylinder barrel and a lower cylinder cover which are sequentially connected from top to bottom, wherein a spring is sequentially arranged in the cylinder barrel from top to bottom, an upper piston, an energy absorption box and a lower piston, a first through hole is formed in the middle of the upper piston, emulsion enters the upper part of the upper piston through the first through hole, a liquid discharge pipe is fixedly connected with the lower cylinder cover, the upper part of the liquid discharge pipe penetrates through the lower piston to extend into the energy absorption box, a second through hole is formed in the top of the liquid discharge pipe, and a third through hole is formed in the upper part of the side surface of the liquid discharge pipe.

However, above-mentioned technical scheme still has following defect, and when the device was gone into hydraulic prop with the emulsified liquid in the scour protection energy-absorber, be not convenient for impress the emulsified liquid that enters into the space more than the lower piston in the hydraulic prop to impact protection energy-absorber next time produces the influence, makes the interior emulsified liquid of hydraulic prop reduce simultaneously, influences hydraulic prop's strut effect.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an anti-impact energy absorber for a hydraulic support, and aims to solve the problems that when the anti-impact energy absorber in the prior art is used for pressing emulsified liquid in the anti-impact energy absorber into a hydraulic strut, the emulsified liquid entering a space above a lower piston is inconvenient to press into the hydraulic strut, so that the next anti-impact energy absorber effect is influenced, and meanwhile, the emulsified liquid in the hydraulic strut is reduced, and the supporting effect of the hydraulic strut is influenced.

In order to achieve the purpose, the utility model adopts the following technical scheme: the impact-resistant energy absorber for the hydraulic support comprises: the cylinder barrel and the installation respectively at the last cylinder cap and the lower cylinder cap of cylinder barrel top and bottom, the safety valve that is linked together rather than inside is installed to outer wall one side bottom of cylinder barrel, the installation of cylinder barrel both ends respectively with last cylinder cap and lower cylinder cap fixed connection's first spacing post, the inside movable mounting of cylinder barrel has lower piston and last piston that slides along first spacing post outer wall single degree of freedom, the top of lower piston and last piston is fixed mounting respectively has and is used for preventing dashing first elastic energy-absorbing spare and second elastic energy-absorbing spare that absorbs energy.

In order to enable the hydraulic support to have the function of carrying out graded impact prevention and energy absorption on the hydraulic support, the hydraulic support further adopts the technical scheme that at least two through holes uniformly distributed along the circumferential direction are formed in the periphery of the top end of the upper piston, and at least two second limiting columns uniformly distributed along the circumferential direction are fixedly mounted on the periphery of the top of the lower piston.

According to a further technical scheme, the number of the second limiting columns is the same as that of the through holes, the two groups of the second limiting columns correspond to the positions of the through holes, and the lower piston is in sliding connection with the upper piston through the matching of the second limiting columns and the through holes.

According to a further technical scheme, two ends of the first elastic energy-absorbing piece are fixedly connected with the upper cylinder cover and the upper piston respectively, and two ends of the second elastic energy-absorbing piece are fixedly connected with the lower piston and the upper piston respectively.

According to a further technical scheme, the first elastic energy absorbing piece and the second elastic energy absorbing piece are both springs, and the elasticity of the first elastic energy absorbing piece is larger than that of the second elastic energy absorbing piece.

According to a further technical scheme, a limiting baffle ring used for limiting the ascending of the upper piston is fixedly mounted at the top end of the inner wall of the cylinder barrel, the liquid inlet communication pressure of the safety valve is the same as the maximum supporting resistance of the hydraulic support, and the liquid discharge pressure of the safety valve is smaller than the elastic force of the first elastic energy-absorbing piece and the second elastic energy-absorbing piece.

The utility model has the beneficial effects that:

when the device works, when the liquid pressure in the cylinder body of the hydraulic prop exceeds the maximum supporting resistance of the hydraulic support, the liquid in the cylinder body of the hydraulic prop enters a space below a lower piston in the cylinder barrel through the safety valve and drives the lower piston to ascend, the second elastic energy-absorbing part absorbs energy and contracts at the moment, when the contraction quantity of the second elastic energy-absorbing part reaches the maximum value, redundant impact energy still exists, the lower piston drives the upper piston to ascend at the moment, the first elastic energy-absorbing part absorbs energy and contracts, after the impact-proof energy absorption is finished, the lower piston and the upper piston reset under the elastic force action of the second elastic energy-absorbing part and the first elastic energy-absorbing part, all liquid in the cylinder barrel is pressed into the hydraulic support again, the supporting resistance of the hydraulic prop is restored in time, and the structural stability of roadway surrounding rocks is guaranteed.

Drawings

Fig. 1 is an external structural view of an embodiment of the present invention.

Fig. 2 is a schematic diagram of the internal structure of the embodiment of the present invention.

In the figure: 1. a cylinder barrel; 2. an upper cylinder cover; 3. a lower cylinder cover; 4. a safety valve; 5. a lower piston; 6. an upper piston; 7. a limit stop ring; 8. a first limit post; 9. a second limit post; 10. a first elastic energy absorbing member; 11. a second elastic energy absorbing member.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings.

1-2, an impact absorber for a hydraulic mount, comprising: the cylinder barrel 1 and the upper cylinder cover 2 and the lower cylinder cover 3 which are respectively arranged at the top and the bottom of the cylinder barrel 1, the safety valve 4 communicated with the inside of the cylinder barrel 1 is arranged at the bottom of one side of the outer wall of the cylinder barrel 1, the cylinder barrel 1 is provided with a first limiting column 8, two ends of the first limiting column are respectively fixedly connected with the upper cylinder cover 2 and the lower cylinder cover 3, the inner part of the cylinder barrel 1 is movably provided with a lower piston 5 and an upper piston 6 which slide along the outer wall of the first limiting column 8 in a single degree of freedom, and the top of the lower piston 5 and the top of the upper piston 6 are respectively and fixedly provided with a first elastic energy absorbing piece 10 and a second elastic energy absorbing piece 11 which are used for preventing impact energy absorption.

In the embodiment, when the device works, when the liquid pressure in the cylinder body of the hydraulic prop exceeds the maximum supporting resistance of the hydraulic support, the liquid in the cylinder body of the hydraulic prop enters the space below the lower piston 5 in the cylinder barrel 1 through the safety valve 4 and drives the lower piston 5 to ascend, the second elastic energy-absorbing part 11 absorbs energy and contracts at the moment, when the contraction amount of the second elastic energy-absorbing part 11 reaches the maximum, redundant impact energy still exists, the lower piston 5 drives the upper piston 6 to ascend at the moment, the first elastic energy-absorbing part 10 absorbs energy and contracts, after the impact-proof energy absorption is finished, the lower piston 5 and the upper piston 6 reset under the elastic force of the second elastic energy-absorbing part 11 and the first elastic energy-absorbing part 10, the liquid in the cylinder barrel 1 is pressed into the hydraulic support again, the supporting resistance of the hydraulic prop is restored in time, and the structure stability of the surrounding rock is guaranteed.

Specifically, at least two through holes uniformly distributed along the circumferential direction are formed in the periphery of the top end of the upper piston 6, and at least two second limiting columns 9 uniformly distributed along the circumferential direction are fixedly mounted on the periphery of the top of the lower piston 5.

Furthermore, the number of the second limiting columns 9 is the same as that of the through holes, the positions of the two groups of the second limiting columns correspond to that of the through holes, and the lower piston 5 is in sliding connection with the upper piston 6 through the matching of the second limiting columns 9 and the through holes.

Specifically, two ends of the first elastic energy-absorbing member 10 are fixedly connected with the upper cylinder head 2 and the upper piston 6, respectively, and two ends of the second elastic energy-absorbing member 11 are fixedly connected with the lower piston 5 and the upper piston 6, respectively.

Preferably, the first elastic energy-absorbing piece 10 and the second elastic energy-absorbing piece 11 are both springs, and the elasticity of the first elastic energy-absorbing piece 10 is greater than that of the second elastic energy-absorbing piece 11, so that the hydraulic support can be subjected to graded impact resistance and energy absorption.

Specifically, a limit stop ring 7 used for limiting the ascending of the upper piston 6 is fixedly mounted at the top end of the inner wall of the cylinder barrel 1, the liquid inlet communication pressure of the safety valve 4 is the same as the maximum support resistance of the hydraulic support, and the liquid discharge pressure of the safety valve 4 is smaller than the elastic force of the first elastic energy-absorbing part 10 and the second elastic energy-absorbing part 11.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. An impact absorber for a hydraulic mount, comprising: the cylinder barrel (1) and the installation respectively at last cylinder cap (2) and lower cylinder cap (3) of cylinder barrel (1) top and bottom, its characterized in that, the safety valve (4) that are linked together rather than inside is installed to the outer wall one side bottom of cylinder barrel (1), the installation of cylinder barrel (1) both ends respectively with last cylinder cap (2) and lower cylinder cap (3) fixed connection's first spacing post (8), the inside movable mounting of cylinder barrel (1) has lower piston (5) and last piston (6) that slide along first spacing post (8) outer wall single degree of freedom, the top of lower piston (5) and last piston (6) is fixed mounting respectively has first elasticity energy-absorbing spare (10) and second elasticity energy-absorbing spare (11) that are used for preventing dashing the energy-absorbing.

2. The anti-impact energy absorber for the hydraulic support according to claim 1, wherein the periphery of the top end of the upper piston (6) is provided with at least two through holes which are uniformly distributed along the circumferential direction, and the periphery of the top of the lower piston (5) is fixedly provided with at least two second limiting columns (9) which are uniformly distributed along the circumferential direction.

3. An anti-impact energy absorber for a hydraulic support according to claim 2, wherein the number of the second limiting columns (9) is the same as that of the through holes, the positions of the two groups of the second limiting columns correspond to that of the through holes, and the lower piston (5) is in sliding connection with the upper piston (6) through the matching of the second limiting columns (9) and the through holes.

4. An impact-proof energy absorber for a hydraulic support according to claim 1, wherein both ends of the first elastic energy-absorbing member (10) are fixedly connected with the upper cylinder head (2) and the upper piston (6), respectively, and both ends of the second elastic energy-absorbing member (11) are fixedly connected with the lower piston (5) and the upper piston (6), respectively.

5. An impact protection energy absorber for a hydraulic support according to claim 4, wherein the first elastic energy absorbing member (10) and the second elastic energy absorbing member (11) are both springs, and the first elastic energy absorbing member (10) has a greater elastic force than the second elastic energy absorbing member (11).

6. The impact-proof energy absorber for the hydraulic support according to any one of claims 1-5, wherein a limit stop ring (7) for limiting the ascending of the upper piston (6) is fixedly installed at the top end of the inner wall of the cylinder barrel (1), the liquid inlet communication pressure of the safety valve (4) is the same as the maximum support resistance of the hydraulic support, and the liquid discharge pressure of the safety valve (4) is smaller than the elastic force of the first elastic energy-absorbing piece (10) and the second elastic energy-absorbing piece (11).