CN110219988A - A kind of high working face hydraulic support column cylinder mouth new type sealing device - Google Patents
A kind of high working face hydraulic support column cylinder mouth new type sealing device Download PDFInfo
- Publication number
- CN110219988A CN110219988A CN201910427142.9A CN201910427142A CN110219988A CN 110219988 A CN110219988 A CN 110219988A CN 201910427142 A CN201910427142 A CN 201910427142A CN 110219988 A CN110219988 A CN 110219988A
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- Prior art keywords
- wall
- ring
- seal
- cylinder body
- guide sleeve
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- Pending
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- 238000007789 sealing Methods 0.000 title claims abstract description 32
- 230000005291 magnetic effect Effects 0.000 claims abstract description 22
- 229920001971 elastomer Polymers 0.000 claims abstract description 11
- 239000000806 elastomer Substances 0.000 claims abstract description 11
- 229920002635 polyurethane Polymers 0.000 claims abstract description 8
- 239000004814 polyurethane Substances 0.000 claims abstract description 8
- 229920000459 Nitrile rubber Polymers 0.000 claims abstract description 6
- 238000005065 mining Methods 0.000 description 7
- 238000000518 rheometry Methods 0.000 description 5
- 239000003245 coal Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005294 ferromagnetic effect Effects 0.000 description 2
- 239000006249 magnetic particle Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- E21D15/50—Component parts or details of props
- E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
- F16J15/43—Sealings between relatively-moving surfaces by means of fluid kept in sealing position by magnetic force
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Sealing Devices (AREA)
Abstract
A kind of high working face hydraulic support column cylinder mouth new type sealing device, including outer cylinder body, middle cylinder body and piston rod, middle cylinder body is slidedly assemblied in outer cylinder body, piston rod is slidedly assemblied in middle cylinder body, outer cylinder body upper inside wall is provided with seal assembly on first, middle inboard wall of cylinder block top is provided with seal assembly on second, seal component architecture is identical on seal assembly and second on first, seal assembly includes guide sleeve and interstage sleeve on first, guide sleeve is located at the lower section of interstage sleeve, guide sleeve outer wall offers wide annular groove, electromagnet is equipped in wide annular groove, electromagnet connects external power supply；Guide sleeve inner wall offers seal groove, and y-type seal ring, the second O-ring seal and third retaining ring are embedded in seal groove, and y-type seal ring is made of polyurethane magnetic current elastomer, and the second O-ring seal is made of nitrile rubber based magnetic rheologic elastomer.The present invention can change the elasticity modulus and rigidity of two kinds of sealing rings, the effective support performance of lifting system sealing performance and working face.
Description
Technical field
The present invention relates to technical field of mechanical, specifically, are related to a kind of high working face hydraulic support column cylinder mouth use
New type sealing device.
Background technique
With the development that high-efficient automatic coal-mining technique and shaft production automate in recent years, high working face hydraulic support technology exists
It continues to develop and updates, but because coal working face operating condition is complicated, the sealing of high working face hydraulic support is still faced with friction, abrasion, corruption
A variety of unfavorable factors such as erosion, there are working media leakage problems.Currently, working media used in most high working face hydraulic supports
It is emulsion, once leaking, not only results in the wasting of resources, also will cause environmental pollution, and will lead to hydraulic branch
Frame can not provide effective support for working face, will cause the generation of the accidents such as fully-mechanized mining working large area roof fall when serious, increase
The security risk of exploitation work, hinders the further exploitation of coal resources, and then constrain further building for coal mining enterprise
If.
Seal failure is to cause the fundamental factor of hydraulic support leakage, and most typically and important sealing are that column is close on bracket
Envelope, sealing reliability is the important guarantee of fully-mechanized mining working support system reliability, and sealing technique is the core of hydraulic support
One of heart technology.Current most of high working face hydraulic support cylinder mouths are all made of using polyurethane matter y-type seal ring as main seal ring
Compound seal, with the increase of internal system pressure, polyurethane matter y-type seal ring contact stress constantly increases so that sealing
Interface barometric gradient is integrally on a declining curve, and sealing performance gradually weakens.Furthermore in high working face hydraulic support real work
In, roof weighting has the characteristics that sudden, instantaneous, pressure is big mostly, cause the sealing system of bracket oil cylinder for a long time by
The impacting with high pressure load of alternation acts on, this can undoubtedly make sealing ring generate the contact stress of alternation, causes the fatigue of sealing ring
Abrasion and destruction, lead to seal failure.
In order to solve the above problems, people are seeking always a kind of ideal technical solution.
Summary of the invention
The object of the present invention is to provide a kind of high working face hydraulic support column cylinder mouth new type sealing devices, can be according to top plate
It presses the elasticity modulus and rigidity of situation adaptive change sealing ring, effectively improves the barometric gradient of seal interface contact stress,
The effective support performance of lifting system sealing performance and working face can further increase the anti-ability of biting of sealing ring and wear-resisting
Property, its fretting wear degree is reduced, is effectively prolonged its service life, maintenance cost and the fully-mechanized mining working for reducing hydraulic system are dynamic
Power calamity source degree.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of high working face hydraulic support column cylinder mouth new type sealing device, including be arranged along the vertical direction outer cylinder body, in
Cylinder body and piston rod, outer cylinder body, middle cylinder body and piston rod are hollow structure and top is open, the middle coaxial sliding dress of cylinder body
It fits in outer cylinder body, piston rod is coaxial to be slidedly assemblied in middle cylinder body, and outer cylinder body upper inside wall is provided with and middle outer wall of cylinder block
It is slidingly sealed seal assembly on the first of cooperation, middle inboard wall of cylinder block top, which is provided with, is slidingly sealed the of cooperation with piston rod outer wall
Seal assembly on two, seal component architecture is identical on seal assembly and second on first, and seal assembly includes being set on first
The guide sleeve and interstage sleeve of middle outer wall of cylinder block, outer cylinder body inner wall are provided with the ring-shaped step for axially position guide sleeve, guide sleeve
And interstage sleeve outer wall and outer cylinder body inner wall between and guide sleeve and interstage sleeve inner wall and middle cylinder body outer wall between equal gap
Cooperation, guide sleeve are located at the lower section of interstage sleeve, and guide sleeve outer wall is successively spaced apart from bottom to up equipped with narrow annular groove and width annular
Groove is embedded with first O-ring seal and first retaining ring in narrow annular groove, is equipped with one in wide annular groove
The electromagnet of cirque structure, electromagnet connect external power supply by electrified wire, and interstage sleeve outer wall is lower thin and upper thick, and whole is in ladder
Shape structure, and snap ring is arranged at its ladder, the outer diameter of snap ring is greater than the maximum outside diameter of interstage sleeve, and outer cylinder body inner wall corresponds to interstage sleeve
The first card slot is offered at ladder, the outer circumference portion matching of snap ring is fastened in the first card slot, the lower end surface of snap ring and guide sleeve
Upper surface compressive contact, outer cylinder body inner wall upper end cylinder oral area offers the second card slot, the second retaining ring is arranged in the second card slot,
The lower end surface of second retaining ring and the upper surface compressive contact of interstage sleeve, the second retaining ring pass through the fixed company of several screws being circumferentially arranged
It connects on the upper surface of interstage sleeve；Guide sleeve inner wall is successively spaced apart is equipped with guide groove and seal groove from bottom to up, on interstage sleeve inner wall
Dustproof groove is offered, guide ring is embedded in guide groove, y-type seal ring, the second O-ring seal and third are embedded in seal groove
Retaining ring, the second O-ring seal are folded in the clamp mouth part of y-type seal ring, and the upper end inner circle of y-type seal ring is equipped with ring-shaped step slot,
Third retaining ring is fastened in ring-shaped step slot, the medial surface of y-type seal ring and third retaining ring with middle outer wall of cylinder block compressive contact,
Y-type seal ring is made of polyurethane magnetic current elastomer, and the second O-ring seal is made of nitrile rubber based magnetic rheologic elastomer,
Dust-proof seal ring is embedded in dustproof groove.
There are two narrow annular groove settings.
Guide sleeve inner wall on second in seal assembly is also provided with the guide groove being located above seal groove.
Guide sleeve upper surface is provided in the axial direction with the first threading hole being connected to wide annular groove, and interstage sleeve upper surface is along axial direction
The second threading hole transparent and corresponding with the first threading hole is offered, electrified wire passes through the first threading hole and the second threading
Hole is connect with external power supply.
Sliding is equipped with respectively between outer cylinder body inner wall and middle outer wall of cylinder block and between middle inboard wall of cylinder block and piston rod outer wall
It is sleeved on the distance set of middle outer wall of cylinder block and piston rod outer wall.
The lower end of piston rod is welded with the piston for being slidably fitted in middle inner chamber of cylinder block, and the upper end of piston rod is welded with movable post.
The present invention has substantive distinguishing features outstanding and significant progress compared with the prior art, specifically, Y of the invention
Type sealing ring is made of polyurethane magnetic current elastomer, and the second O-ring seal is made of nitrile rubber based magnetic rheologic elastomer, by
It is that the ferromagnetic particle of micron order scale is incorporated into high molecular polymer matrix in magnetic rheology elastic body, and in magnetic field environment
Under solidify, the intracorporal magnetic-particle of base forms chain or column structure, therefore magnetorheological elasticity under the action of an external magnetic field
Physical efficiency shows significant magnetic rheology effect, and its elasticity modulus and rigidity can change with the variation of applied field strengths, such as
The input current of electromagnet is adaptively adjusted according to hydraulic support roof weighting situation in this, to change y-type seal ring and
The elasticity modulus and rigidity of two O-ring seals effectively improve the barometric gradient of seal interface contact stress, lifting system leakproofness
Can and working face effective support performance, the anti-ability of biting of y-type seal ring and the second O-ring seal and resistance to can be further increased
Mill property, reduces its fretting wear degree, effectively prolongs its service life, reduce the maintenance cost and fully-mechanized mining working of hydraulic system
Dynamic disaster degree of risk.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Fig. 2 is partial enlarged view at A in Fig. 1.
Specific embodiment
The following is further explained with reference to the attached drawings the embodiment of the present invention.
As depicted in figs. 1 and 2, a kind of high working face hydraulic support column cylinder mouth new type sealing device, including along vertical
Outer cylinder body 1, middle cylinder body 2 and the piston rod 3 of direction setting, outer cylinder body 1, middle cylinder body 2 and piston rod 3 are hollow structure and top
Open, middle cylinder body 2 is coaxial to be slidedly assemblied in outer cylinder body 1, and piston rod 3 is coaxial to be slidedly assemblied in middle cylinder body 2, outer shell
1 upper inside wall of body, which is provided with, is slidingly sealed seal assembly on the first of cooperation with middle 2 outer wall of cylinder body, and middle 2 upper inside wall of cylinder body is set
It is equipped with and is slidingly sealed seal assembly on the second of cooperation with 3 outer wall of piston rod, seal assembly on seal assembly and second on first
Structure is identical, and seal assembly includes the guide sleeve 4 and interstage sleeve 5 for being set in middle 2 outer wall of cylinder body, the setting of 1 inner wall of outer cylinder body on first
Have a ring-shaped step 21 for axially position guide sleeve 4, between the inner wall of the outer wall and outer cylinder body 1 of guide sleeve 4 and interstage sleeve 5 and
Equal clearance fit between the outer wall of the inner wall and middle cylinder body 2 of guide sleeve 4 and interstage sleeve 5, guide sleeve 4 are located at the lower section of interstage sleeve 5, guiding
It covers 4 outer walls and is successively spaced apart from bottom to up and be equipped with narrow annular groove and wide annular groove, one the is embedded in narrow annular groove
One O-ring seal 6 and first retaining ring 7 are equipped with the electromagnet 8 of a cirque structure, electromagnet 8 in wide annular groove
External power supply is connected by electrified wire, 5 outer wall of interstage sleeve is lower thin and upper thick, whole stepped structure, and is arranged at its ladder
There is a snap ring 9, the outer diameter of snap ring 9 is greater than the maximum outside diameter of interstage sleeve 5, and 1 inner wall of outer cylinder body, which corresponds to, offers the at 5 stepped locations of interstage sleeve
The outer circumference portion matching of one card slot, snap ring 9 is fastened in the first card slot, and the lower end surface of snap ring 9 and the upper surface of guide sleeve 4 are pressed
Contact, 1 inner wall upper end cylinder oral area of outer cylinder body offer the second card slot, the second retaining ring 10, the second retaining ring are arranged in the second card slot
10 lower end surface and the upper surface compressive contact of interstage sleeve 5, the second retaining ring 10 pass through the fixed company of several screws 11 being circumferentially arranged
It connects on the upper surface of interstage sleeve 5；4 inner wall of guide sleeve is successively spaced apart is equipped with guide groove and seal groove, 5 inner wall of interstage sleeve from bottom to up
On offer dustproof groove, the guide ring 12 for being socketed in middle 2 outer wall of cylinder body is embedded in guide groove, it is close to be embedded with Y type in seal groove
Seal 13, the second O-ring seal 14 and third retaining ring 15, the second O-ring seal 14 are folded in the clamp mouth part of y-type seal ring 13, Y
The upper end inner circle of type sealing ring 13 is equipped with ring-shaped step slot, and third retaining ring 15 is fastened in ring-shaped step slot, 13 He of y-type seal ring
The medial surface of third retaining ring 15 is with middle 2 outer wall compressive contact of cylinder body, and y-type seal ring 13 is by polyurethane magnetic current elasticity system
At the second O-ring seal 14 is made of nitrile rubber based magnetic rheologic elastomer, and dust-proof seal ring 22 is embedded in dustproof groove.
There are two narrow annular groove settings.
4 inner wall of guide sleeve on second in seal assembly is also provided with the guide groove being located above seal groove.
4 upper surface of guide sleeve is provided in the axial direction with the first threading hole 16 being connected to wide annular groove, 5 upper surface edge of interstage sleeve
The second threading hole 17 transparent and corresponding with the first threading hole 16 is axially offered, electrified wire passes through the first threading hole 16
It is connect with the second threading hole 17 with external power supply.
It is slided respectively between 2 outer wall of 1 inner wall of outer cylinder body and middle cylinder body and between 3 outer wall of 2 inner wall of middle cylinder body and piston rod
18 are covered equipped with the distance for being sleeved on middle 2 outer wall of cylinder body and 3 outer wall of piston rod.
The lower end of piston rod 3 is welded with the piston 19 for being slidably fitted in middle 2 inner cavity of cylinder body, and the upper end of piston rod 3 is welded with
Movable post 20.
Y-type seal ring 13 of the invention is made of polyurethane magnetic current elastomer, and the second O-ring seal 14 is by nitrile rubber
Based magnetic rheologic elastomer is made, since magnetic rheology elastic body is that the ferromagnetic particle of micron order scale is incorporated into high molecular polymerization
In object matrix, and solidify under magnetic field environment, the intracorporal magnetic-particle of base forms chain or column structure, therefore is adding outside
Magnetic rheology elastic body can show significant magnetic rheology effect under magnetic fields, and its elasticity modulus and rigidity can be with externally-applied magnetic fields
The variation of intensity and change, in this way, the input current of electromagnet 8 is adaptively adjusted according to hydraulic support roof weighting situation, from
And change the elasticity modulus and rigidity of y-type seal ring 13 and the second O-ring seal 14, effectively improve seal interface contact stress
The effective support performance of barometric gradient, lifting system sealing performance and working face, can further increase y-type seal ring 13 and second
The anti-ability of biting and wearability of O-ring seal 14 reduce its fretting wear degree, effectively prolong its service life, and reduce liquid
The maintenance cost and fully-mechanized mining working dynamic disaster degree of risk of pressure system.
The above embodiments are only used to illustrate and not limit the technical solutions of the present invention, although referring to above-described embodiment to this hair
It is bright to be described in detail, those skilled in the art should understand that；Still the present invention can be modified or be waited
With replacement, without departing from the spirit or scope of the invention, or any substitutions, should all cover in power of the invention
In sharp claimed range.
Claims (6)
1. a kind of high working face hydraulic support column cylinder mouth new type sealing device, including be arranged along the vertical direction outer cylinder body,
Middle cylinder body and piston rod, outer cylinder body, middle cylinder body and piston rod are hollow structure and top is open, the middle coaxial sliding of cylinder body
It is assemblied in outer cylinder body, piston rod is coaxial to be slidedly assemblied in middle cylinder body, and outer cylinder body upper inside wall is provided with external with middle cylinder
Wall is slidingly sealed seal assembly on the first of cooperation, and middle inboard wall of cylinder block top, which is provided with, is slidingly sealed cooperation with piston rod outer wall
Seal assembly on second, it is characterised in that: seal component architecture is identical on seal assembly and second on first, sealing group on first
Part includes the guide sleeve and interstage sleeve for being set in middle outer wall of cylinder block, and outer cylinder body inner wall is provided with the annular for axially position guide sleeve
Between the outer wall of step, guide sleeve and interstage sleeve and the inner wall of outer cylinder body and the outer wall of the inner wall of guide sleeve and interstage sleeve and middle cylinder body
Between equal clearance fit, guide sleeve is located at the lower section of interstage sleeve, and guide sleeve outer wall is successively spaced apart that be equipped with narrow annular recessed from bottom to up
Slot and wide annular groove, are embedded with first O-ring seal and first retaining ring in narrow annular groove, in wide annular groove
It is equipped with the electromagnet of a cirque structure, electromagnet connects external power supply by electrified wire, and interstage sleeve outer wall is lower thin and upper thick,
Whole stepped structure, and snap ring is arranged at its ladder, the outer diameter of snap ring are greater than the maximum outside diameter of interstage sleeve, in outer cylinder body
Wall corresponds to and offers the first card slot at interstage sleeve stepped locations, and the outer circumference portion matching of snap ring is fastened in the first card slot, snap ring
The upper surface compressive contact of lower end surface and guide sleeve, outer cylinder body inner wall upper end cylinder oral area offer the second card slot, in the second card slot
It is arranged with the second retaining ring, the lower end surface of the second retaining ring and the upper surface compressive contact of interstage sleeve, the second retaining ring, which passes through, to be circumferentially arranged
Several screws are fixedly connected on the upper surface of interstage sleeve；Guide sleeve inner wall is successively spaced apart equipped with guide groove and close from bottom to up
Sealing groove offers dustproof groove on interstage sleeve inner wall, guide ring is embedded in guide groove, y-type seal ring, second are embedded in seal groove
O-ring seal and third retaining ring, the second O-ring seal are folded in the clamp mouth part of y-type seal ring, the upper end inner circle of y-type seal ring
Equipped with ring-shaped step slot, third retaining ring is fastened in ring-shaped step slot, and the medial surface of y-type seal ring and third retaining ring is and middle cylinder
External wall compressive contact, y-type seal ring are made of polyurethane magnetic current elastomer, and the second O-ring seal is by nitrile rubber base magnetic
Magnetorheological elastomer is made, and dust-proof seal ring is embedded in dustproof groove.
2. a kind of high working face hydraulic support column cylinder mouth new type sealing device according to claim 1, it is characterised in that:
There are two narrow annular groove settings.
3. a kind of high working face hydraulic support column cylinder mouth new type sealing device according to claim 2, it is characterised in that:
Guide sleeve inner wall on second in seal assembly is also provided with the guide groove being located above seal groove.
4. a kind of high working face hydraulic support column cylinder mouth new type sealing device according to claim 1-3,
Be characterized in that: guide sleeve upper surface is provided in the axial direction with the first threading hole being connected to wide annular groove, and interstage sleeve upper surface is along axis
To the second threading hole transparent and corresponding with the first threading hole is offered, electrified wire passes through the first threading hole and second and wears
String holes is connect with external power supply.
5. a kind of high working face hydraulic support column cylinder mouth new type sealing device according to claim 4, it is characterised in that:
It is slided respectively between outer cylinder body inner wall and middle outer wall of cylinder block and between middle inboard wall of cylinder block and piston rod outer wall equipped in being sleeved on
The distance set of outer wall of cylinder block and piston rod outer wall.
6. a kind of high working face hydraulic support column cylinder mouth new type sealing device according to claim 5, it is characterised in that:
The lower end of piston rod is welded with the piston for being slidably fitted in middle inner chamber of cylinder block, and the upper end of piston rod is welded with movable post.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910427142.9A CN110219988A (en) | 2019-05-22 | 2019-05-22 | A kind of high working face hydraulic support column cylinder mouth new type sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910427142.9A CN110219988A (en) | 2019-05-22 | 2019-05-22 | A kind of high working face hydraulic support column cylinder mouth new type sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110219988A true CN110219988A (en) | 2019-09-10 |
Family
ID=67821698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910427142.9A Pending CN110219988A (en) | 2019-05-22 | 2019-05-22 | A kind of high working face hydraulic support column cylinder mouth new type sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110219988A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115163145A (en) * | 2022-09-05 | 2022-10-11 | 河南省豫煤矿机有限公司 | Double-telescopic upright post for hydraulic support of high-speed coal mine |
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| DE202005017073U1 (en) * | 2005-10-28 | 2005-12-29 | Dbt Bergbau-Service Gmbh | Hydraulic prop for use as pit prop, has sleeve retainer fastened at front side of cylinder tube casing and comprising retaining grooves for sealing and guiding unit, where edges of grooves are provided with bronze coated weld |
| CN201310364Y (en) * | 2008-12-16 | 2009-09-16 | 郑州煤矿机械集团股份有限公司 | Rapid feed-return liquor shock resistance double-telescopic prop of hydraulic support |
| CN102140923A (en) * | 2011-04-12 | 2011-08-03 | 天地科技股份有限公司 | Guide ring overwelding seam large-cylinder bottom double-telescopic upright column |
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| CN205936669U (en) * | 2016-08-26 | 2017-02-08 | 兖矿集团有限公司 | Stand with card key formula jar mouth dustproof mechanism |
| CN206608401U (en) * | 2017-03-28 | 2017-11-03 | 金耀辉 | A kind of hydraulic support column seal with annular groove attachment structure |
| CN107312215A (en) * | 2017-07-17 | 2017-11-03 | 王再国 | A kind of magnetic rubber sealing ring |
| CN108361269A (en) * | 2018-03-07 | 2018-08-03 | 湘潭大学 | A kind of magnetic rheology elastic body washer and its control device |
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2019
- 2019-05-22 CN CN201910427142.9A patent/CN110219988A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202005017073U1 (en) * | 2005-10-28 | 2005-12-29 | Dbt Bergbau-Service Gmbh | Hydraulic prop for use as pit prop, has sleeve retainer fastened at front side of cylinder tube casing and comprising retaining grooves for sealing and guiding unit, where edges of grooves are provided with bronze coated weld |
| CN201310364Y (en) * | 2008-12-16 | 2009-09-16 | 郑州煤矿机械集团股份有限公司 | Rapid feed-return liquor shock resistance double-telescopic prop of hydraulic support |
| CN102140923A (en) * | 2011-04-12 | 2011-08-03 | 天地科技股份有限公司 | Guide ring overwelding seam large-cylinder bottom double-telescopic upright column |
| CN202832572U (en) * | 2012-08-13 | 2013-03-27 | 山东鲁南装备制造有限公司 | Vertical column applied to hydraulic support |
| CN205936669U (en) * | 2016-08-26 | 2017-02-08 | 兖矿集团有限公司 | Stand with card key formula jar mouth dustproof mechanism |
| CN206608401U (en) * | 2017-03-28 | 2017-11-03 | 金耀辉 | A kind of hydraulic support column seal with annular groove attachment structure |
| CN107312215A (en) * | 2017-07-17 | 2017-11-03 | 王再国 | A kind of magnetic rubber sealing ring |
| CN108361269A (en) * | 2018-03-07 | 2018-08-03 | 湘潭大学 | A kind of magnetic rheology elastic body washer and its control device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115163145A (en) * | 2022-09-05 | 2022-10-11 | 河南省豫煤矿机有限公司 | Double-telescopic upright post for hydraulic support of high-speed coal mine |
| CN115163145B (en) * | 2022-09-05 | 2022-11-18 | 河南省豫煤矿机有限公司 | Double-telescopic upright post for hydraulic support of high-speed coal mine |
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Application publication date: 20190910 |
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| RJ01 | Rejection of invention patent application after publication |