CN105041350A - Hydraulic prop having anchoring force energy-absorbing buffering function - Google Patents
Hydraulic prop having anchoring force energy-absorbing buffering function Download PDFInfo
- Publication number
- CN105041350A CN105041350A CN201510297577.8A CN201510297577A CN105041350A CN 105041350 A CN105041350 A CN 105041350A CN 201510297577 A CN201510297577 A CN 201510297577A CN 105041350 A CN105041350 A CN 105041350A
- Authority
- CN
- China
- Prior art keywords
- energy
- hydraulic prop
- lever
- pads
- push
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
A hydraulic prop having an anchoring force energy-absorbing buffering function comprises a prop main body part. An anchoring force energy-absorbing buffering mechanism part is arranged at the end of a movable column of the prop main body part, so as to overcome the shortcoming that an existing hydraulic prop is weak in impact resistance. When the hydraulic prop is subjected to impact of an external load and when the loading force is not enough to break open a clamping pin in an anchoring force supporting state, the impact load can be resisted through the rigid supporting of the clamping pin; and when the loading force exceeds the anchoring force supporting force of the clamping pin, the clamping pin cannot support an outer sleeve any longer and is obliged to retract towards an inner sleeve. While the clamping pin retracts, an energy-absorbing block is compressed in first time to absorb energy, precious buffering time is provided for the opening of a hydraulic prop safety valve, the safety valve is prevented from being damaged in an instant by huge impact force, the occurrence probability of cylinder explosion, sealing ring crushing and prop instability and bending is reduced, the impact resistance of the hydraulic prop is improved, and the safety factor of the hydraulic prop and a supporting system where the hydraulic prop is located is improved.
Description
Technical field
The invention belongs to safety of coal mines support technology field, particularly relate to and a kind of there is the hydraulic prop determining power energy-absorbing buffering function.
Background technology
Hydraulic prop, because it has the function of extremely strong enabling capabilities and self regulating and control load, be widely used in, in current coal mine support, being common in the heavy support apparatus such as comprehensive mining hydraulic bracket, brettis and self-advancing hydraulic support, also having the use of partial monosomy hydraulic prop.Hydraulic prop form of structure is succinct, method of operating is easy, only need can reach higher setting load by outside fluid injection, and when external applied load exceedes the threshold value of hydraulic prop setting, safety valve is then opened immediately and is carried out discharge opeing pressure release, when load is down within threshold value, safety valve then cuts out automatically, in this way the function of teaching display stand regulation and control load.Therefore, hydraulic prop is provided with extremely strong adaptive capacity under complicated, severe coal mine support condition, makes it in coal mine support, serve important function.
However, still there is a critical defect in hydraulic prop.Hydraulic prop due to safety valve opening time and discharge opeing pressure release speed be all certain, and happen suddenly in mining process ore deposit shake, bump or roof break time, country rock is extremely of short duration to the percussion of the prop in tunnel or work plane, therefore just occurred that safety valve is not yet opened, just by the situation of huge impact force transient breakdown, even detonation, sealing ring crushing, the bending of pillar unstability etc., and then the supporting causing whole support or support system was lost efficacy.Therefore, be necessary to design a kind of novel hydraulic prop, make up the defect that existing hydraulic prop impact resistance is on the weak side, and then improve the safety factor of hydraulic prop and place support system thereof.
Summary of the invention
For prior art Problems existing, the invention provides and a kind of there is the hydraulic prop determining power energy-absorbing buffering function, effectively can improve the impact resistance of hydraulic prop, and improve the safety factor of hydraulic prop and place support system thereof.
To achieve these goals, the present invention adopts following technical scheme: a kind of have the hydraulic prop determining power energy-absorbing buffering function, comprise support-column main body part, described support-column main body part comprises post alive, cylinder body and safety valve, described post alive is arranged in cylinder body, and safety valve is positioned at cylinder body outside and is connected with cylinder interior; Be provided with in the column end alive of described support-column main body part and determine power energy-absorbing buffering mechanism section.
The described power of determining energy-absorbing buffering mechanism section comprises energy-absorbing section and determines power section, described energy-absorbing section comprises termination, outer sleeve, energy absorbent block and pressing plate, the described power of determining section comprises inner sleeve, bayonet lock, lever, push-pads, limiting stand, volution and bottom, described termination is fixedly installed in outer sleeve one end, energy absorbent block and pressing plate are positioned at outer sleeve inside, energy absorbent block one end and termination fit, and the energy absorbent block other end and pressing plate fit; Described inner sleeve one end is positioned at outer sleeve and is connected mutually with pressing plate, and it is outer and be fixedly connected with bottom that the inner sleeve other end is positioned at outer sleeve, and described bottom is connected mutually with work post; Offer pin-and-hole in the pressing plate side of described inner sleeve, the outer sleeve inwall that pin-and-hole is corresponding offers groove, and described bayonet lock is positioned at pin-and-hole, and bayonet lock head is positioned at groove, and bayonet lock afterbody is positioned at inner sleeve inside; Offer open slot in the bottom side of described inner sleeve, described push-pads is positioned at open slot, and push-pads head end is set to inclined-plane, and push-pads afterbody is positioned at inner sleeve inside; Described lever is positioned at inner sleeve, and lever one end and bayonet lock afterbody fit, and the lever other end and push-pads afterbody fit; Described limiting stand is arranged on inner sleeve inside center place, and is connected with bottom, and limiting stand outer end props up lever, and the contact point of limiting stand and lever is as the fulcrum of lever; Described volution is threaded connection on bottom, and push-pads head end contacts with volution inner surface and coordinates.
Described push-pads tail end face is set to convex arc surface, and the contact surface of described lever and push-pads afterbody is set to concaved circular cambered surface.
Described limiting stand is connected by adjusting bolt with between bottom, and the distance between limiting stand and bottom is regulated by adjusting bolt.
The quantity of described bayonet lock, lever and push-pads is some and equal, and bayonet lock, lever and push-pads are along the uniform setting of inner sleeve circumference.
Beneficial effect of the present invention:
The present invention is in order to make up existing hydraulic prop impact resistance defect on the weak side, install additional in the column end alive of hydraulic prop and determined power energy-absorbing buffering mechanism section, when hydraulic prop is subjected to suddenly external shock effect under normal supporting state, the amplitude of impact load is reduced instantaneously by the distortion energy-absorbing of Ding Li energy-absorbing buffering mechanism and process of stepping down, percussion that what relieving hydraulic pillar was subject to exceed the quata, also for the unlatching of hydraulic prop safety valve provides the valuable time, safety valve is prevented to be washed out instantaneously by huge impact, reduce detonation, sealing ring crushes, the occurrence probability of the consequences such as pillar unstability bending, thus improve the impact resistance of hydraulic prop, and improve the safety factor of hydraulic prop and place support system thereof.
Accompanying drawing explanation
Fig. 1 of the present inventionly a kind ofly has the hydraulic prop structural representation determining power energy-absorbing buffering function;
Fig. 2 is I portion enlarged drawing in Fig. 1;
Fig. 3 is outer sleeve structure schematic diagram of the present invention;
Fig. 4 is inner sleeve structure schematic diagram of the present invention;
Fig. 5 is limiting stand structural representation of the present invention;
Fig. 6 is the top view of Fig. 5;
In figure, 1-termination, 2-outer sleeve, 3-energy absorbent block, 4-pressing plate, 5-inner sleeve, 6-bayonet lock, 7-lever, 8-push-pads, 9-limiting stand, 10-volution, 11-bottom, 12-pin-and-hole, 13-groove, 14-open slot, 15-adjusting bolt, 16-post of living, 17-cylinder body.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in figs. 1 to 6, have the hydraulic prop determining power energy-absorbing buffering function, comprise support-column main body part, described support-column main body part comprises post 16 alive, cylinder body 17 and safety valve, described post alive 16 is arranged in cylinder body 17, and safety valve is positioned at cylinder body 17 outside and is connected with cylinder body 17 inside; Be characterized in: be provided with in post alive 16 end of described support-column main body part and determine power energy-absorbing buffering mechanism section.
The described power of determining energy-absorbing buffering mechanism section comprises energy-absorbing section and determines power section, described energy-absorbing section comprises termination 1, outer sleeve 2, energy absorbent block 3 and pressing plate 4, the described power of determining section comprises inner sleeve 5, bayonet lock 6, lever 7, push-pads 8, limiting stand 9, volution 10 and bottom 11, described termination 1 is fixedly installed in outer sleeve 2 one end, it is inner that energy absorbent block 3 and pressing plate 4 are positioned at outer sleeve 2, energy absorbent block 3 one end and termination 1 fit, and energy absorbent block 3 other end and pressing plate 4 fit; Described inner sleeve 5 one end is positioned at outer sleeve 2 and is connected mutually with pressing plate 4, and it is outer and be fixedly connected with bottom 11 that inner sleeve 5 other end is positioned at outer sleeve 2, and described bottom 11 is connected mutually with work post; Offer pin-and-hole 12 in the pressing plate side of described inner sleeve 5, outer sleeve 2 inwall of pin-and-hole 12 correspondence offers groove 13, and described bayonet lock 6 is positioned at pin-and-hole 12, and bayonet lock 6 head is positioned at groove 13, and it is inner that bayonet lock 6 afterbody is positioned at inner sleeve 5; Offer open slot 14 in the bottom side of described inner sleeve 5, described push-pads 8 is positioned at open slot 14, and push-pads 8 head end is set to inclined-plane, and it is inner that push-pads 8 afterbody is positioned at inner sleeve 5; Described lever 7 is positioned at inner sleeve 5, and lever 7 one end and bayonet lock 6 afterbody fit, and lever 7 other end and push-pads 8 afterbody fit; Described limiting stand 9 is arranged on inner sleeve 5 inside center place, and is connected with bottom 11, and limiting stand 9 outer end props up lever 7, and the contact point of limiting stand 9 and lever 7 is as the fulcrum of lever 7; Described volution 10 is threaded connection on bottom 11, and push-pads 8 head end contacts with volution 10 inner surface and coordinates.
Described push-pads 8 tail end face is set to convex arc surface, and described lever 7 is set to concaved circular cambered surface with the contact surface of push-pads 8 afterbody.
Described limiting stand 9 is connected by adjusting bolt 15 with between bottom 11, and the distance between limiting stand 9 and bottom 11 is regulated by adjusting bolt 15.
The quantity of described bayonet lock 6, lever 7 and push-pads 8 is some and equal, and bayonet lock 6, lever 7 and push-pads 8 are along the circumferential uniform setting of inner sleeve 5.
Below in conjunction with accompanying drawing, a use procedure of the present invention is described:
In the present embodiment, bayonet lock 6, the quantity of lever 7 and push-pads 8 is all set to 8, lever 7 adopts steel spring plate to make, energy absorbent block 3 adopts honeycomb structure energy-absorbing material to make, the position of limiting stand 9 is adjusted by adjusting bolt 15, realize the adjustment to the position of the fulcrum of lever 7, then volution 10 is screwed, screw in process at volution 10, volution 10 inner surface constantly inwardly can extrude push-pads 8, inwardly lever 7 one end is promoted by extruding push-pads 8, under leverage, realize lever 7 other end and outwards promote bayonet lock 6, bayonet lock 6 pairs of outer sleeves 2 are made to apply external support force, along with constantly screwing of volution 10, the external support force of bayonet lock 6 pairs of outer sleeves 2 increases gradually, until external support force reaches setting value, now, outer sleeve 2 is supported on inner sleeve 5 by 8 bayonet locks 6 completely, in an initial condition, energy absorbent block 3 is not squeezed power.
When hydraulic prop is subjected to suddenly external shock effect under normal supporting state, if impact force is less, when being not enough to break the bayonet lock 6 being in and determining power holding state, just this part shock loading can be resisted by the rigid support of bayonet lock 6, if impact force is larger, exceed bayonet lock 6 determine power support force time, bayonet lock 6 cannot support outer sleeve 2 again, thus be forced to retract to inner sleeve 5, while bayonet lock 6 is retracted, energy absorbent block 3 will be carried out energy-absorbing in the very first time by compressing, thus the amplitude of impact load is reduced instantaneously by the distortion energy-absorbing of Ding Li energy-absorbing buffering mechanism and process of stepping down, percussion that what relieving hydraulic pillar was subject to exceed the quata, also for the unlatching of hydraulic prop safety valve provides the valuable time, safety valve is prevented to be washed out instantaneously by huge impact, reduce detonation, sealing ring crushes, the occurrence probability of the consequences such as pillar unstability bending, thus improve the impact resistance of hydraulic prop, and improve the safety factor of hydraulic prop and place support system thereof.
Scheme in embodiment is also not used to limit scope of patent protection of the present invention, and the equivalence that all the present invention of disengaging do is implemented or changed, and is all contained in the scope of the claims of this case.
Claims (5)
1. have the hydraulic prop determining power energy-absorbing buffering function, comprise support-column main body part, described support-column main body part comprises post alive, cylinder body and safety valve, and described post alive is arranged in cylinder body, and safety valve is positioned at cylinder body outside and is connected with cylinder interior; It is characterized in that: be provided with in the column end alive of described support-column main body part and determine power energy-absorbing buffering mechanism section.
2. according to claim 1 a kind ofly have the hydraulic prop determining power energy-absorbing buffering function, it is characterized in that: the described power of determining energy-absorbing buffering mechanism section comprises energy-absorbing section and determines power section, described energy-absorbing section comprises termination, outer sleeve, energy absorbent block and pressing plate, the described power of determining section comprises inner sleeve, bayonet lock, lever, push-pads, limiting stand, volution and bottom, described termination is fixedly installed in outer sleeve one end, energy absorbent block and pressing plate are positioned at outer sleeve inside, energy absorbent block one end and termination fit, and the energy absorbent block other end and pressing plate fit; Described inner sleeve one end is positioned at outer sleeve and is connected mutually with pressing plate, and it is outer and be fixedly connected with bottom that the inner sleeve other end is positioned at outer sleeve, and described bottom is connected mutually with work post; Offer pin-and-hole in the pressing plate side of described inner sleeve, the outer sleeve inwall that pin-and-hole is corresponding offers groove, and described bayonet lock is positioned at pin-and-hole, and bayonet lock head is positioned at groove, and bayonet lock afterbody is positioned at inner sleeve inside; Offer open slot in the bottom side of described inner sleeve, described push-pads is positioned at open slot, and push-pads head end is set to inclined-plane, and push-pads afterbody is positioned at inner sleeve inside; Described lever is positioned at inner sleeve, and lever one end and bayonet lock afterbody fit, and the lever other end and push-pads afterbody fit; Described limiting stand is arranged on inner sleeve inside center place, and is connected with bottom, and limiting stand outer end props up lever, and the contact point of limiting stand and lever is as the fulcrum of lever; Described volution is threaded connection on bottom, and push-pads head end contacts with volution inner surface and coordinates.
3. according to claim 2 a kind ofly have the hydraulic prop determining power energy-absorbing buffering function, it is characterized in that: described push-pads tail end face is set to convex arc surface, and the contact surface of described lever and push-pads afterbody is set to concaved circular cambered surface.
4. according to claim 2 a kind ofly have the hydraulic prop determining power energy-absorbing buffering function, and it is characterized in that: described limiting stand is connected by adjusting bolt with between bottom, the distance between limiting stand and bottom is regulated by adjusting bolt.
5. according to claim 2 a kind ofly have the hydraulic prop determining power energy-absorbing buffering function, it is characterized in that: the quantity of described bayonet lock, lever and push-pads is some and equal, and bayonet lock, lever and push-pads are along the uniform setting of inner sleeve circumference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510297577.8A CN105041350B (en) | 2015-06-02 | 2015-06-02 | Hydraulic prop having anchoring force energy-absorbing buffering function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510297577.8A CN105041350B (en) | 2015-06-02 | 2015-06-02 | Hydraulic prop having anchoring force energy-absorbing buffering function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105041350A true CN105041350A (en) | 2015-11-11 |
| CN105041350B CN105041350B (en) | 2017-05-17 |
Family
ID=54448272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510297577.8A Active CN105041350B (en) | 2015-06-02 | 2015-06-02 | Hydraulic prop having anchoring force energy-absorbing buffering function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105041350B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422145A (en) * | 2015-12-30 | 2016-03-23 | 辽宁工程技术大学 | U-steel yieldable support with resistance increase and energy absorption functions |
| CN109323935A (en) * | 2018-11-23 | 2019-02-12 | 中国汽车技术研究中心有限公司 | A kind of protective device and impact device of impact device load transducer |
| CN110206567A (en) * | 2019-05-23 | 2019-09-06 | 天地科技股份有限公司 | A kind of energy-absorbing erosion control shock resistance telescopic column and its shock resistance method |
| CN110593920A (en) * | 2019-10-08 | 2019-12-20 | 河南工程学院 | Temporary anti-impact supporting device capable of absorbing blasting vibration energy in driving roadway |
| CN113074007A (en) * | 2021-04-26 | 2021-07-06 | 辽宁工程技术大学 | Anti-impact energy absorber for hydraulic support |
| CN113107554A (en) * | 2021-05-20 | 2021-07-13 | 辽宁工程技术大学 | Buffering support device that steps down with negative stiffness energy-absorbing characteristic |
| 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 |
| WO2022141581A1 (en) * | 2020-12-31 | 2022-07-07 | 山东科技大学 | Hydraulic support double-cavity post jack structure and energy-absorption, impact-resistance and constant-resistance method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL2030437B1 (en) * | 2022-01-05 | 2023-07-10 | Univ Liaoning Technical | Support-spallation integrated system for preventing damage of surrounding rock of roadway by rock burst |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2150005C1 (en) * | 1999-03-24 | 2000-05-27 | Институт горного дела СО РАН | Hydraulic prop with protection from dynamic loads |
| CN202055845U (en) * | 2011-05-25 | 2011-11-30 | 兖矿集团有限公司 | Single hydraulic prop |
| CN102606177A (en) * | 2012-03-28 | 2012-07-25 | 北京诚田恒业煤矿设备有限公司 | Hydraulic prop for hydraulic support system |
| CN102748042A (en) * | 2012-07-10 | 2012-10-24 | 北京诚田恒业煤矿设备有限公司 | Valve-column integrated type hydraulic bracket supporting column for coal mine |
| CN202659253U (en) * | 2012-06-26 | 2013-01-09 | 姚鸿俊 | Energy conservation and environmental protection type corrosion resistance single hydraulic prop |
-
2015
- 2015-06-02 CN CN201510297577.8A patent/CN105041350B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2150005C1 (en) * | 1999-03-24 | 2000-05-27 | Институт горного дела СО РАН | Hydraulic prop with protection from dynamic loads |
| CN202055845U (en) * | 2011-05-25 | 2011-11-30 | 兖矿集团有限公司 | Single hydraulic prop |
| CN102606177A (en) * | 2012-03-28 | 2012-07-25 | 北京诚田恒业煤矿设备有限公司 | Hydraulic prop for hydraulic support system |
| CN202659253U (en) * | 2012-06-26 | 2013-01-09 | 姚鸿俊 | Energy conservation and environmental protection type corrosion resistance single hydraulic prop |
| CN102748042A (en) * | 2012-07-10 | 2012-10-24 | 北京诚田恒业煤矿设备有限公司 | Valve-column integrated type hydraulic bracket supporting column for coal mine |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422145A (en) * | 2015-12-30 | 2016-03-23 | 辽宁工程技术大学 | U-steel yieldable support with resistance increase and energy absorption functions |
| CN109323935A (en) * | 2018-11-23 | 2019-02-12 | 中国汽车技术研究中心有限公司 | A kind of protective device and impact device of impact device load transducer |
| CN110206567A (en) * | 2019-05-23 | 2019-09-06 | 天地科技股份有限公司 | A kind of energy-absorbing erosion control shock resistance telescopic column and its shock resistance method |
| CN110206567B (en) * | 2019-05-23 | 2021-06-22 | 天地科技股份有限公司 | Energy-absorbing impact-resistant telescopic upright column and impact-resistant method thereof |
| CN110593920A (en) * | 2019-10-08 | 2019-12-20 | 河南工程学院 | Temporary anti-impact supporting device capable of absorbing blasting vibration energy in driving roadway |
| CN110593920B (en) * | 2019-10-08 | 2020-11-24 | 河南工程学院 | Temporary anti-impact supporting device capable of absorbing blasting vibration energy in driving roadway |
| WO2022141581A1 (en) * | 2020-12-31 | 2022-07-07 | 山东科技大学 | Hydraulic support double-cavity post jack structure and energy-absorption, impact-resistance and constant-resistance method thereof |
| CN113074007A (en) * | 2021-04-26 | 2021-07-06 | 辽宁工程技术大学 | Anti-impact energy absorber for hydraulic support |
| CN113074007B (en) * | 2021-04-26 | 2022-09-27 | 辽宁工程技术大学 | Anti-impact energy absorber for hydraulic support |
| CN113107554A (en) * | 2021-05-20 | 2021-07-13 | 辽宁工程技术大学 | Buffering support device that steps down with negative stiffness energy-absorbing characteristic |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105041350B (en) | 2017-05-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105041350A (en) | Hydraulic prop having anchoring force energy-absorbing buffering function | |
| CN104989436B (en) | A kind of shock proof drift section hydraulic support of energy-absorption type | |
| CN103821547B (en) | A kind of shock resistance large deformation anchor rod | |
| CN103573279A (en) | Mining telescopic energy adsorption anti-impact viscous damping anchor rod and supporting method thereof | |
| CN108119175B (en) | A kind of resigning buffering energy-absorbing impact preventing anchor rod | |
| CN103557020B (en) | Energy-absorption and impact-prevention supporting and protecting device for combined type circular tunnel | |
| CN203296794U (en) | Yielding extensible fiber reinforced plastic anchor rod | |
| CN108868856A (en) | Anti- HI high impact large deformation energy-absorbing anchoring tray component and its energy-absorbing anchoring process | |
| CN203669901U (en) | Mining telescopic energy absorption and scour prevention viscous damping anchor rod | |
| CN105298525B (en) | Press to protecting against shock lengthening anchor pole | |
| CN202718693U (en) | Ring-shaped pressure-buffering shock-absorbing device for support of anchor stock or anchor cable | |
| CN205422770U (en) | Recoverable anchor rope of constant -resistance large deformation | |
| CN107676115A (en) | A kind of screw thread shearing type energy-absorbing erosion control hydraulic vertical prop | |
| CN103982212B (en) | The anti-energy-absorbing checking motion that allows of mining hexagon tubular type | |
| CN102536280A (en) | Resistance-increasing yielding anchor rod | |
| CN203769818U (en) | Shock-resisting large-deformation anchor bolt | |
| CN208793023U (en) | Anti- HI high impact large deformation energy-absorbing anchoring tray component | |
| CN209430225U (en) | A kind of hydraulic vertical prop stepped down with the quick energy-absorbing of accumulator | |
| CN103628901B (en) | Mining diameter-expanding type anti-impact single hydraulic bracket | |
| CN106194226A (en) | A kind of energy-absorbing pallet of self adaptation stress | |
| CN210829316U (en) | Strong energy-absorbing hydraulic support pillar with rock burst resistance function | |
| CN205277468U (en) | Novel yielding bolt | |
| CN208267886U (en) | A kind of adaptively release can anchor pole | |
| CN209908543U (en) | Multistage yielding large-deformation anchor rod | |
| CN110206567B (en) | Energy-absorbing impact-resistant telescopic upright column and impact-resistant method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |