CN113074007A - Anti-impact energy absorber for hydraulic support - Google Patents
Anti-impact energy absorber for hydraulic support Download PDFInfo
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- CN113074007A CN113074007A CN202110463834.6A CN202110463834A CN113074007A CN 113074007 A CN113074007 A CN 113074007A CN 202110463834 A CN202110463834 A CN 202110463834A CN 113074007 A CN113074007 A CN 113074007A
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- hydraulic support
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- 239000006096 absorbing agent Substances 0.000 title claims abstract description 27
- 239000000839 emulsion Substances 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims description 51
- 238000007599 discharging Methods 0.000 claims description 29
- 238000010521 absorption reaction Methods 0.000 claims description 26
- 238000007789 sealing Methods 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 239000011435 rock Substances 0.000 abstract description 39
- 238000005266 casting Methods 0.000 abstract 4
- 230000009471 action Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 239000003245 coal Substances 0.000 description 5
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 230000003139 buffering effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Geology (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Vibration Dampers (AREA)
Abstract
An anti-impact energy absorber for a hydraulic support belongs to the technical field of roadway supporting equipment. A scour protection energy-absorber for hydraulic support includes the last cylinder cap that from the top down connected gradually, cylinder and lower cylinder cap, from the top down has set gradually the spring in the cylinder, go up the piston, energy-absorbing box and lower piston, the middle part of going up the piston is provided with first through-hole, make the emulsion enter into the upper portion of last piston through first through-hole, lower cylinder cap fixedly connected with casting tube, the upper portion of casting tube is passed down inside the piston stretches into the energy-absorbing box, the top of casting tube is provided with the second through-hole, the side upper portion of casting tube is provided with the third through-hole. The anti-impact energy absorber for the hydraulic support and the hydraulic support are arranged separately, so that the pressure of impact load on the hydraulic support can be reduced when rock burst occurs, the pressure of a hydraulic support is enabled to be within a supporting range of a support, the supporting performance and the energy-absorbing anti-impact capacity of the hydraulic support are improved, and the stability of a roadway is maintained.
Description
Technical Field
The invention relates to the technical field of roadway supporting equipment, in particular to an anti-impact energy absorber for a hydraulic support.
Background
With the rapid development of coal resources, the front coal resources are gradually reduced, and the coal mining depth is gradually increased. Under the conditions of high ground stress and complex geological environment, roadway rock burst disasters of deep coal mines are gradually increased, released energy is gradually increased, and the hydraulic support becomes common supporting equipment for deep rock burst roadways. However, the strong shock waves generated by the rock burst in deep mining are transmitted to a roadway hydraulic support by surrounding rocks to generate strong instantaneous dynamic pressure on the hydraulic support, and the hydraulic support on the conventional common hydraulic support cannot be quickly opened and drained due to limited drainage speed and flow of a safety valve in a very short time, so that the pressure of the hydraulic support exceeds a limit value in a short time, and the phenomena of buckling, thickening, bursting, breaking and the like of the upright are generated, and finally the roadway is deformed and damaged, even collapsed and damaged, and serious casualties and property loss are caused.
At present, an energy-absorbing impact-preventing hydraulic support absorbs impact energy through an energy-absorbing box arranged on a top beam of the hydraulic support or a hydraulic strut to prevent the hydraulic support from being damaged due to dynamic load impact, but the energy-absorbing box is directly arranged on the hydraulic support or the hydraulic strut and is in a compressed state for a long time, and can be subjected to fatigue damage under the action of small impact load for many times to reduce the energy-absorbing performance of the energy-absorbing box. On the other hand, the rated working resistance of the hydraulic strut is lower than the minimum load of the energy absorption box during deformation energy absorption work, so when the impact load is small, the energy absorption box cannot play a role in deformation energy absorption, the instant supporting pressure of the hydraulic strut is increased, although obvious deformation damage does not occur, fatigue damage also occurs under the action of multiple small-energy impact loads, and the surrounding rock deforms under the action of the impact load, so that the supporting resistance of the hydraulic support is reduced, and the supporting performance and the energy absorption performance of the hydraulic support are influenced. In order to improve the support performance and the energy-absorbing impact-resisting capability of the hydraulic support and maintain the stability of a roadway, an energy absorber is needed, and the phenomena of fatigue damage and support resistance reduction are avoided when small-energy rock burst occurs; when high-energy rock burst occurs, the energy absorption box can be used for timely absorbing energy and buffering to prevent the main body of the hydraulic support from being damaged; when the catastrophic rock burst with extra-large energy occurs, the energy absorption box is utilized to absorb energy and buffer, the hydraulic prop can be quickly drained, a larger deformation space is provided for surrounding rocks in time, and the whole instability damage caused by local overload of the hydraulic support is avoided.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides an anti-impact energy absorber for a hydraulic support, which is arranged separately from the hydraulic support, when rock burst occurs, the pressure of liquid in a hydraulic prop of a roadway is quickly reduced by utilizing energy-absorbing members such as an energy-absorbing box and a spring and the like and the quick liquid discharge of a liquid discharge pipe, the pressure of impact load on the hydraulic support is reduced, the buffering and energy-absorbing effects are achieved, the pressure of the hydraulic prop is ensured to be within the bearing range of the prop, the supporting performance and the energy-absorbing anti-impact capability of the hydraulic support are improved, and the stability of the roadway is maintained.
In order to achieve the purpose, the technical scheme of the invention is as follows:
an anti-impact energy absorber for a hydraulic support is connected to a hydraulic strut of the hydraulic support and comprises an upper cylinder cover, a cylinder barrel and a lower cylinder cover which are sequentially connected from top to bottom;
a spring, an upper piston, an energy absorption box and a lower piston are sequentially arranged in the cylinder barrel from top to bottom, and a first through hole is formed in the middle of the upper piston, so that emulsion enters the upper part of the upper piston through the first through hole;
the lower cylinder cover is fixedly connected with a liquid discharging pipe, the upper portion of the liquid discharging pipe penetrates through the lower piston and extends into the energy absorption box, a second through hole is formed in the top of the liquid discharging pipe, and a third through hole is formed in the upper portion of the side face of the liquid discharging pipe.
Further, a connector is arranged below the cylinder barrel and connected with a liquid injection hole of the hydraulic prop, and a valve is arranged on the connector.
Further, a safety valve is arranged below the cylinder barrel.
Furthermore, the bottom surface of the liquid discharging pipe is fixedly connected with the inner wall of the lower cylinder cover, a second through hole is formed in the top of the liquid discharging pipe, and a plurality of third through holes are formed in the upper portion of the side face of the liquid discharging pipe.
Preferably, the upper portion of the upper piston is provided with a boss for fixing the spring.
Preferably, the inner diameter of the upper part of the cylinder barrel is smaller than that of the lower part of the cylinder barrel.
Preferably, the upper piston, the lower piston and the cylinder barrel are sealed through sealing rings, and the liquid discharge pipe and the lower piston are sealed through sealing rings.
The invention has the beneficial effects that:
the invention can obviously improve the rock burst prevention and control technical level of the rock burst mine and the safety guarantee capability of the coal mine, effectively prevent the rock burst from occurring or control the damage degree of the tunnel when the rock burst accident occurs, reduce the casualties and property loss, reduce the maintenance cost of the tunnel bracket, and has good social benefits, and the concrete advantages are as follows:
1) the anti-impact energy absorber is arranged separately from the hydraulic support, belongs to an external anti-impact energy absorber, is placed outside the hydraulic prop, is convenient for replacing an energy absorption box after being impacted, can be simultaneously connected with a plurality of hydraulic props, can be directly additionally arranged on a common hydraulic prop, and has the advantages of simple connection, convenient replacement, low use cost and the like;
2) when the roadway rock burst occurs, different parts are utilized to prevent and control rock bursts of different levels, at the moment of the occurrence of the rock burst, the spring and the energy absorption box are utilized to quickly absorb impact energy, and emulsion in the hydraulic strut is quickly transferred into the anti-impact energy absorber, so that the hydraulic strut can be ensured to quickly yield and relieve pressure, and the hydraulic strut and the hydraulic support are protected from being damaged by impact;
3) the spring has two functions of energy absorption and energy storage, when the roadway surrounding rock is deformed due to rock burst, and the support resistance of the hydraulic prop is reduced, the emulsion in the anti-impact energy absorber can be timely pressed into the hydraulic prop by the elastic energy stored in the spring, so that the support resistance of the hydraulic prop is recovered, and the structural stability of the roadway surrounding rock is guaranteed.
Additional features and advantages of the invention will be set forth in part in the detailed description which follows.
Drawings
Fig. 1 is a schematic structural diagram of an anti-impact energy absorber for a hydraulic bracket according to an embodiment of the present invention.
Reference numerals in the drawings of the specification include:
1-an upper cylinder cover, 2-a spring, 3-an upper piston, 4-a cylinder barrel, 5-an energy absorption box, 6-a liquid discharge pipe, 7-a lower piston, 8-a valve, 9-a joint, 10-a safety valve, 11-a lower cylinder cover, 12-a first through hole, 13-a second through hole and 14-a third through hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations and positional relationships based on those shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In order to solve the problems in the prior art, as shown in fig. 1, the invention provides an anti-impact energy absorber for a hydraulic support, which is connected to a hydraulic strut of the hydraulic support, and comprises an upper cylinder cover 1, a cylinder barrel 4 and a lower cylinder cover 11 which are sequentially connected from top to bottom;
the spring 2, the upper piston 3, the energy absorption box 5 and the lower piston 7 are sequentially arranged in the cylinder barrel 4 from top to bottom, and the middle part of the upper piston 3 is provided with a first through hole 12, so that emulsion enters the upper part of the upper piston 3 through the first through hole 12;
the lower cylinder cover 11 is fixedly connected with a liquid discharging pipe 6, the upper portion of the liquid discharging pipe 6 penetrates through the lower piston 7 and extends into the energy absorption box 5, a second through hole 13 is formed in the top of the liquid discharging pipe 6, and a third through hole 14 is formed in the upper portion of the side face of the liquid discharging pipe 6.
In this embodiment, the upper cylinder cover 1 and the lower cylinder cover 11 are both fixedly connected with the cylinder barrel 4 through threads, the spring 2 is placed between the upper cylinder cover 1 and the upper piston 3, the energy absorption box 5 is of a cylindrical structure with an upper opening and a lower opening, and is placed between the upper piston 3 and the lower piston 7, the upper piston 3 and the cylinder barrel 4 are sealed through a sealing ring, the liquid discharge pipe 6 and the lower piston 7 are sealed through a sealing ring, and the lower piston 7 and the cylinder barrel 4 are sealed through a sealing ring.
In the invention, a joint 9 is arranged below the cylinder barrel 4, the joint 9 is connected with a liquid injection hole of the hydraulic prop, and the joint 9 is provided with a valve 8, in the embodiment, the joint 9 is fixedly connected with the cylinder 4 through threads, the joint 9 is connected with a liquid injection hole of the hydraulic prop through a pressure hose, the valve 8 is used as a switch for controlling the flow of emulsion in the pipeline, when rock burst occurs, roadway surrounding rocks impact the hydraulic support, emulsion in the hydraulic support enters the cylinder barrel 4 through the pressure hose, impact energy released by the surrounding rocks is absorbed by the spring 2 and the energy absorption box 5 respectively, when the releasing energy of the surrounding rock is larger and the lower piston 7 moves upwards for a certain distance, the emulsion is quickly released between the upper piston 7 and the lower piston 7 into the cylinder barrel 4 by the liquid discharging pipe 6, make hydraulic prop can be in the short time quick tapping shrink, avoid under the impact load hydraulic support to buckle because of transshipping and destroy.
In the invention, a safety valve 10 is also arranged below the cylinder barrel 4, and the safety valve 10 adopts the prior art, can be connected with an oil supply pipe and is used for supplying emulsion into an anti-impact energy absorber; the emulsion in the anti-impact energy absorber can be discharged according to the set pressure.
In the invention, the bottom surface of the liquid discharging pipe 6 is fixedly connected with the inner wall of the lower cylinder cover 11, the top of the liquid discharging pipe 6 is provided with a second through hole 13, the upper part of the side surface of the liquid discharging pipe 6 is provided with a plurality of third through holes 14, so that when the lower piston 7 rises to a certain height under the action of emulsion, the emulsion enters the liquid discharging pipe 6 through the third through holes 14 on the side surface of the liquid discharging pipe 6 and below the lower piston 7, and then enters the cylinder barrel 4 above the upper surface of the lower piston 7 through the second through hole 13 on the top surface of the liquid discharging pipe 6 and the third through holes 14 on the side surface of the liquid discharging pipe 6 and above the lower piston 7.
Preferably, the upper portion of the upper piston 3 is provided with a boss for fixing the spring 2.
Preferably, the inner diameter of the upper part of the cylinder 4 is smaller than that of the lower part thereof, so as to restrict the upper limit of upward movement of the upper piston 3, ensure that the compression amount of the spring 2 does not exceed the maximum compression amount, and avoid the excessive compression amount of the spring 2 from causing plastic deformation damage.
Preferably, the upper piston 3, the lower piston 7 and the cylinder 4 are sealed by sealing rings, and the liquid discharge pipe 6 and the lower piston 7 are sealed by sealing rings.
The invention relates to a one-time use process of an anti-impact energy absorber for a hydraulic support, which comprises the following steps:
the injection hole of the roadway hydraulic prop is connected with the connector 9 of the anti-impact energy absorber through a pressure hose, then the valve 8 is opened, the emulsion starts to be injected through the safety valve 10, the emulsion enters the cylinder barrel 4 and is injected into the hydraulic prop through the connector 9, and the injection is stopped when the initial supporting force of the hydraulic prop is reached;
when the tunnel surrounding rock is slowly deformed and the supporting force of the hydraulic prop exceeds the maximum supporting force, emulsified hydraulic pressure in the hydraulic prop enters the cylinder barrel 4 through the pressure hose through the joint 9 and is discharged through the safety valve 10, so that the supporting force of the hydraulic prop is kept within a rated range;
when rock burst occurs, the rock burst is in a weak rock burst grade, the impact load is small, the supporting force of the hydraulic prop exceeds the rated maximum value instantly, the liquid discharge speed of the safety valve 10 is slow, the liquid discharge is not in time to discharge and release the pressure, the pressure of the emulsion in the cylinder barrel 4 is increased, the lower piston 7 is rapidly pushed to move upwards, the lower piston 7 pushes the energy absorption box 5, the energy absorption box 5 pushes the upper piston 3, the upper piston 3 compresses the spring 2, and the spring 2 is rapidly contracted, so that the supporting resistance of the hydraulic prop is rapidly reduced, if the supporting resistance of the hydraulic prop caused by the deformation of the surrounding rock of the roadway is reduced after the rock burst occurs, the spring 2 in a compressed state can rapidly rebound, the upper piston 3, the energy absorption box 5 and the lower piston 7 are pushed to move downwards, the emulsion is injected into the hydraulic prop, the supporting resistance of the hydraulic prop is improved, and if the surrounding rock pressure is still high, when the supporting resistance exceeds the rated supporting resistance of the hydraulic prop, the safety valve 10 will slowly discharge liquid, and the supporting resistance of the hydraulic prop is reduced to the rated supporting resistance;
when the rock burst is over medium rock burst in the class, the impact load is large, the supporting force of the hydraulic prop exceeds the rated maximum value instantly, the spring 2 contracts to the limit, the upper piston 3 reaches the upper limit position and does not move upwards any more, but the bearing force of the hydraulic prop cannot be reduced to the rated working resistance, the energy-absorbing box 5 is compressed, absorbed and deformed so as to rapidly reduce the supporting resistance, absorbed and impacted energy of the hydraulic prop, if the energy released by the rock burst is particularly large, the energy-absorbing box 5 is rapidly compressed to the maximum compression amount, the third through hole 14 on the side surface of the liquid discharging pipe 6 is positioned below the lower surface of the lower piston 7, the emulsion enters the liquid discharging pipe 6 through the third through hole 14 on the side surface of the liquid discharging pipe 6 and enters the space of the cylinder barrel 4 above the upper surface of the lower piston 7 through the second through hole 13 on the upper surface of the liquid discharging pipe 6, and is released into the cylinder barrel 4 at an extremely high speed, the supporting resistance of the hydraulic prop is reduced, the hydraulic prop is protected from being damaged due to overlarge bearing capacity, when the bearing capacity of the hydraulic prop is reduced to the rated bearing capacity, the spring 2 rebounds rapidly at the moment to push the upper piston 3, the energy absorption box 5 and the lower piston 7 to move downwards, so that the third through hole 14 in the side face of the liquid discharge pipe 6 is located above the upper surface of the lower piston 7, emulsion is prevented from continuously entering a space above the upper surface of the lower piston 7 of the cylinder barrel 4, the supporting resistance of the hydraulic prop is kept near the rated supporting resistance, and tunnel surrounding rocks are prevented from collapsing and being damaged due to reduction of the supporting resistance of the hydraulic prop.
Compared with the existing energy-absorbing impact-preventing hydraulic prop, the impact-preventing energy absorber has the advantages that through the deformation of the spring 2 and the energy-absorbing box 5 and the quick liquid discharging action of the through hole on the liquid discharging pipe 6, when impact ground pressure occurs, when the liquid pressure in the cylinder body of the hydraulic prop exceeds the maximum supporting resistance of a hydraulic support, firstly, the spring 2 contracts to absorb energy, and emulsion in the hydraulic prop quickly enters a space below a lower piston 7 in the cylinder barrel 4, so that the hydraulic prop is quickly retracted; when the contraction amount of the spring 2 reaches the maximum, redundant impact energy still exists, when the pressure of the emulsion in the hydraulic prop exceeds a rated value and the upper piston 3 rises to the maximum value, the energy absorption box 5 is used for plastic deformation energy absorption, and more emulsion in the hydraulic prop quickly enters a space below a lower piston 7 in the cylinder 4; when the energy released by the rock burst is very large and the dynamic load borne by the hydraulic strut is very large, the emulsion rapidly enters the space above the lower piston 7 through the third through hole 14 on the side surface of the liquid discharge pipe 6 along with the continuous rising of the lower piston 7 and reaches the position of the third through hole 14 on the side surface of the liquid discharge pipe 6, so that the emulsion pressure in the hydraulic strut is rapidly reduced, a larger deformation space is provided for surrounding rocks of a roadway, the breaking strength of the hydraulic support is enhanced, the graded energy absorption of the rock burst of different grades is realized, the defect that the strut resistance cannot be actively adjusted in the conventional energy-absorbing impact-resisting hydraulic strut is overcome, the energy-absorbing box 5 is in a compression state and a repeated cyclic impact load action state for a long time, and the defects of creep and fatigue deformation damage.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (7)
1. An anti-impact energy absorber for a hydraulic support is connected with a hydraulic strut of the hydraulic support and is characterized by comprising an upper cylinder cover, a cylinder barrel and a lower cylinder cover which are sequentially connected from top to bottom;
a spring, an upper piston, an energy absorption box and a lower piston are sequentially arranged in the cylinder barrel from top to bottom, and a first through hole is formed in the middle of the upper piston, so that emulsion enters the upper part of the upper piston through the first through hole;
the lower cylinder cover is fixedly connected with a liquid discharging pipe, the upper portion of the liquid discharging pipe penetrates through the lower piston and extends into the energy absorption box, a second through hole is formed in the top of the liquid discharging pipe, and a third through hole is formed in the upper portion of the side face of the liquid discharging pipe.
2. An impact-resistant energy absorber for a hydraulic support according to claim 1, wherein a joint is arranged below the cylinder barrel, the joint is connected with a liquid injection hole of the hydraulic prop, and the joint is provided with a valve.
3. An impact-prevention energy absorber for a hydraulic support according to claim 2, wherein a safety valve is further provided below the cylinder.
4. An impact-proof energy absorber for a hydraulic support according to claim 3, wherein the bottom surface of the liquid discharge pipe is fixedly connected with the inner wall of the lower cylinder cover, the top of the liquid discharge pipe is provided with a second through hole, and the upper part of the side surface of the liquid discharge pipe is provided with a plurality of third through holes.
5. An impact absorber for a hydraulic support according to any one of claims 1 to 4 wherein the upper portion of the upper piston is provided with a boss for retaining a spring.
6. An impact absorber for a hydraulic mount according to any one of claims 1 to 4 wherein the inner diameter of the upper portion of the cylinder is smaller than the inner diameter of the lower portion thereof.
7. An impact-proof energy absorber for a hydraulic support according to any one of claims 1 to 4, wherein the upper piston and the lower piston are sealed with the cylinder by sealing rings, and the liquid discharge pipe is sealed with the lower piston by a sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110463834.6A CN113074007B (en) | 2021-04-26 | 2021-04-26 | Anti-impact energy absorber for hydraulic support |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110463834.6A CN113074007B (en) | 2021-04-26 | 2021-04-26 | Anti-impact energy absorber for hydraulic support |
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| Publication Number | Publication Date |
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| CN113074007A true CN113074007A (en) | 2021-07-06 |
| CN113074007B CN113074007B (en) | 2022-09-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110463834.6A Active CN113074007B (en) | 2021-04-26 | 2021-04-26 | Anti-impact energy absorber for hydraulic support |
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| CN (1) | CN113074007B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113530579A (en) * | 2021-08-25 | 2021-10-22 | 中煤北京煤矿机械有限责任公司 | Hydraulic support stand is with buffering energy-absorbing mechanism convenient to replacement |
| CN114086996A (en) * | 2021-11-16 | 2022-02-25 | 重庆大学 | Graded energy-absorbing self-starting anti-impact device and method |
| CN114109459A (en) * | 2021-11-23 | 2022-03-01 | 辽宁工程技术大学 | Anti-impact danger-relieving roadway support-surrounding rock spalling integrated system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE4401480A1 (en) * | 1993-07-14 | 1995-07-27 | Vos Richard Grubenausbau Gmbh | Mine support prop with integral pressure limiting value sleeve |
| CN103982208A (en) * | 2014-05-19 | 2014-08-13 | 辽宁工程技术大学 | Mine inner and outer turnover resistive energy-absorption anti-impact device |
| CN104100281A (en) * | 2014-06-16 | 2014-10-15 | 山东科技大学 | Mining multilevel pressure-relief anti-scouring support device, support system and use methods thereof |
| CN105041350A (en) * | 2015-06-02 | 2015-11-11 | 辽宁工程技术大学 | Hydraulic prop having anchoring force energy-absorbing buffering function |
| CN111470043A (en) * | 2020-04-30 | 2020-07-31 | 中国飞机强度研究所 | Combined buffering energy-absorbing structure and air-drop protection device |
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2021
- 2021-04-26 CN CN202110463834.6A patent/CN113074007B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4401480A1 (en) * | 1993-07-14 | 1995-07-27 | Vos Richard Grubenausbau Gmbh | Mine support prop with integral pressure limiting value sleeve |
| CN103982208A (en) * | 2014-05-19 | 2014-08-13 | 辽宁工程技术大学 | Mine inner and outer turnover resistive energy-absorption anti-impact device |
| CN104100281A (en) * | 2014-06-16 | 2014-10-15 | 山东科技大学 | Mining multilevel pressure-relief anti-scouring support device, support system and use methods thereof |
| CN105041350A (en) * | 2015-06-02 | 2015-11-11 | 辽宁工程技术大学 | Hydraulic prop having anchoring force energy-absorbing buffering function |
| CN111470043A (en) * | 2020-04-30 | 2020-07-31 | 中国飞机强度研究所 | Combined buffering energy-absorbing structure and air-drop protection device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113530579A (en) * | 2021-08-25 | 2021-10-22 | 中煤北京煤矿机械有限责任公司 | Hydraulic support stand is with buffering energy-absorbing mechanism convenient to replacement |
| CN114086996A (en) * | 2021-11-16 | 2022-02-25 | 重庆大学 | Graded energy-absorbing self-starting anti-impact device and method |
| CN114086996B (en) * | 2021-11-16 | 2023-12-01 | 重庆大学 | Hierarchical energy-absorbing self-starting anti-impact device and method |
| CN114109459A (en) * | 2021-11-23 | 2022-03-01 | 辽宁工程技术大学 | Anti-impact danger-relieving roadway support-surrounding rock spalling integrated system |
| CN114109459B (en) * | 2021-11-23 | 2023-12-12 | 辽宁工程技术大学 | Anti-impact and anti-danger roadway support-surrounding rock expansion integrated system |
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| Publication number | Publication date |
|---|---|
| CN113074007B (en) | 2022-09-27 |
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