CN201554472U - Composite material coal mine support column - Google Patents
Composite material coal mine support column Download PDFInfo
- Publication number
- CN201554472U CN201554472U CN2009202569064U CN200920256906U CN201554472U CN 201554472 U CN201554472 U CN 201554472U CN 2009202569064 U CN2009202569064 U CN 2009202569064U CN 200920256906 U CN200920256906 U CN 200920256906U CN 201554472 U CN201554472 U CN 201554472U
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- Prior art keywords
- composite material
- coal mine
- support post
- wall
- mine support
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- 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.)
- Expired - Lifetime
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- 239000002131 composite material Substances 0.000 title claims abstract description 70
- 239000003245 coal Substances 0.000 title claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 18
- 230000007704 transition Effects 0.000 claims abstract description 16
- 239000004744 fabric Substances 0.000 claims description 38
- 244000055346 Paulownia Species 0.000 claims description 19
- 239000002023 wood Substances 0.000 claims description 19
- 239000011347 resin Substances 0.000 claims description 12
- 229920005989 resin Polymers 0.000 claims description 12
- 239000000835 fiber Substances 0.000 claims description 9
- 239000006260 foam Substances 0.000 claims description 9
- 239000011521 glass Substances 0.000 claims description 8
- 229920006305 unsaturated polyester Polymers 0.000 claims description 8
- 229920006387 Vinylite Polymers 0.000 claims description 6
- 229920002748 Basalt fiber Polymers 0.000 claims description 5
- 239000003822 epoxy resin Substances 0.000 claims description 5
- 229920000647 polyepoxide Polymers 0.000 claims description 5
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 4
- 125000003118 aryl group Chemical group 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 229920007790 polymethacrylimide foam Polymers 0.000 claims description 4
- 239000011496 polyurethane foam Substances 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 238000007711 solidification Methods 0.000 claims description 4
- 230000008023 solidification Effects 0.000 claims description 4
- 239000011152 fibreglass Substances 0.000 claims description 3
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 9
- 239000010410 layer Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 238000005260 corrosion Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000004567 concrete Substances 0.000 description 5
- 210000001503 joint Anatomy 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000004804 winding Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000805 composite resin Substances 0.000 description 3
- 241000771208 Buchanania arborescens Species 0.000 description 2
- 239000011157 advanced composite material Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 244000050510 Cunninghamia lanceolata Species 0.000 description 1
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
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- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
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Abstract
A composite material coal mine support column is characterized in that the support column is of an integral hollow cylindrical structure or a hollow cylindrical structure consisting of at least two arc sheets, wherein the shell wall of the hollow cylindrical structure consists of a composite material inner wall (1 '), a composite material outer wall (1) and a sandwich material layer (2) clamped between the composite material inner wall (1') and the composite material outer wall (1); two ends of the hollow cylinder are respectively connected with a supporting surface connecting flange (6) which is used for being connected with a supporting top plate or another same coal mine supporting column; the shape of each hollow cylinder structure is in a dumbbell shape, the diameters of two ends are larger than the diameter of the middle section, and a stress transition area (7) is formed between each end and the middle section. The utility model has the advantages of simple structure, convenient manufacture, light weight and high strength.
Description
The utility model has been applied for patent of invention on the same day.
Technical field
The utility model relates to a kind of tunnel supporting articles for use, the support post of using always in especially a kind of underground coal mining operation that is used to support the tunnel, specifically a kind of coal mine support post of composite material.
Background technology
What at present, be used for the coal mine roof plate supporting mainly contains concrete column, steel column, pin etc.Concrete column weight is bigger, and carrying inconvenience also has the light weight concrete construction post at present, but needs dependence on import; The fluid pressure type steel column also has employing at present, but cost is higher; The bearing capacity discreteness of pin is bigger, and the bearing capacity of log is also limited, and rotten easily.Therefore employ new technology, that new material is made the coal mine roof plate support post is extremely urgent.
Fibrous composite has the remarkable advantage of high-strength light, corrosion-resistant, good weatherability.The utility model proposes a kind of fibrae circulares composite material support post of light wood sandwich, its main innovation is the composite material ring-type structure of its timber sandwich, and significantly the rigidity of reinforced composite tube wall solves the problem of its local buckling.Composite material coal mine roof plate support post adopts vacuum guiding and forming technique production, also can be used for column structures such as circular pier template, all kinds of supports.
Summary of the invention
The purpose of this utility model is to have cost height or short problem of life-span at existing all kinds of coal mine support posts, designs the coal mine support post of composite material of a kind of high-strength light, corrosion-resistant, easy carrying, easy assembly unit.
One of the technical solution of the utility model is:
A kind of coal mine support post of composite material, it is characterized in that the hollow circuit cylinder body structure that it is monolithic hollow circuit cylinder body structure or has at least two arc plates to form, the shell wall of described hollow circuit cylinder body structure by composite material inwall 1 ' and composite material outer wall 1 and be installed in composite material inwall 1 ' and composite material outer wall 1 between sandwich material layer 2 form; Respectively be connected with one at the two ends of described hollow circular cylinder and be used for supporting surface adpting flange 6 continuous with roof supporting or that identical coal mine support post with another links to each other; The profile of each hollow circuit cylinder body structure is inferior bell shape, and the diameter at two ends is greater than the interlude diameter, and each end and interlude all are formed with transition of stress district 7.
The both sides of described arc plate all are connected with flange arrangement 3, and its length direction of flange arrangement 3 upper edges offers between a plurality of bolt hole 4, two adjacent two arc plates and links to each other by the bolt 5 that passes bolt hole 4.
Described sandwich material layer 2 is paulownia wood, hard polyurethane foams, PVC foam, PEI foam, PMI foam or burning into sand layer.
Described composite material inwall 1 ' form with composite material outer wall 1 fibreglass cloth and resin solidification, glass fabric be twin shaft to cloth, multiaxis to cloth, grid cloth, fibrofelt, carbon cloth, basalt fiber cloth or aryl fiber cloth, resin is unsaturated polyester (UP), vinylite, epoxy resin or inorganic resin.
Described transition of stress district 7 tapered structures, arc-shaped structure or more than one step-like structure.
Described supporting surface adpting flange 6 is ring-type or the disk-like structure of diameter greater than hollow circuit cylinder body structure end diameter.
Two of the technical solution of the utility model is:
A kind of coal mine support post of composite material, it is characterized in that the cylindrical shape structure that it is made up of cylindrical, massive paulownia wood body 8 and the composite material outer wall 1 that is wrapped in solid paulownia wood body 8 surfaces, its integral body is inferior bell shape structure, is formed with transition of stress district 7 in end and middle junction; Be connected with discoid or circular supporting surface adpting flange 6 at the two ends of cylindrical shape structure.
The beneficial effects of the utility model:
(1) high-strength light, corrosion-resistant.Strong corrosion resistant, the superior fibre reinforced composites of mechanical characteristic have been adopted in the inside and outside top layer of support post, improve the rigidity of structural member with the paulownia wood sandwich in the middle of the fibrous composite panel of both sides, and constitute high performance paulownia wood core filled composite material.This advanced composite material (ACM) support post has high-strength light, performance such as corrosion-resistant, has characteristics such as specific strength and specific stiffness height, designability are strong, is fit to use under the moist adverse circumstances such as colliery.
(2) stressed reliable.The integral rigidity of composite material marmon clamp stem stem is by its external diameter decision, and the thick acquisition of interlayer post jamb that local stiffness is increased by the paulownia wood sandwich, glass fiber compound material hoop effect is (being similar to composite material reinforced concrete column) obviously, so power transmission is more reliable.
(3) cost is low.It is main that this support post adopts the ecological ideas material, and the paulownia wood of being adopted is green recyclable materials, and is cheap; Inside and outside wall glass fiber compound material thickness is less, and price is lower.
(4) installation is convenient.This support post is linked to be whole post by the lighter semicylinder of weight by flange bolt, is about 1/5 of concrete column weight, and convenient transport is easy for installation.
(5) show through axial compression test: the axial pressure that composite material support post of the present utility model can bear reaches more than the 150t, can satisfy the requirement of coal mine roof plate supporting pressure fully.
(6) the utlity model has simple in structure, high-strength light, corrosion-resistant, easy carrying, the easy advantage of assembly unit.
(7) the utility model is not only applicable to the roof timbering of coal mine roadway, can be used for the column structure in engineering fields such as circular pier template, all kinds of supports yet.
Description of drawings
Fig. 1 is a section structure schematic diagram of forming the arc plate of hollow composite support post of the present utility model.
Fig. 2 is the section structure schematic diagram of combined hollow composite material support post of the present utility model.
Fig. 3 is the structural representation of facing of Fig. 2.
The section structure schematic diagram of Fig. 4 overall structure formula of the present utility model hollow composite support post.
Fig. 5 is the structural representation of facing of Fig. 4.
Fig. 6 is the section structure schematic diagram of solid composite material support post of the present utility model.
Fig. 7 is the structural representation of facing of the support post formed of the combined type composite material pillar of two sections same structures.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further described.
Embodiment one.
As shown in Figure 1, 2, 3.
A kind of coal mine support post of composite material, it is the hollow circuit cylinder body structure that has at least two arc plates (Fig. 1) to form, each arc plate by composite material inwall 1 ' and composite material outer wall 1 and be installed in composite material inwall 1 ' and composite material outer wall 1 between sandwich material layer 2 form, the both sides of arc plate all are connected with flange arrangement 3, its length direction of flange arrangement 3 upper edges offers the bolt 5 continuous (Fig. 2) by passing bolt hole 4 between a plurality of bolt hole 4, two adjacent two arc plates.Respectively be connected with one at the two ends of described hollow circular cylinder and be used for and the supporting surface adpting flange 6 that roof supporting links to each other or identical coal mine support post with another links to each other, supporting surface adpting flange 6 is ring-type or the disk-like structure of diameter greater than hollow circuit cylinder body structure end diameter; The profile of each hollow circuit cylinder body structure is inferior bell shape, the diameter at two ends is greater than the interlude diameter, and each end and interlude all are formed with transition of stress district 7, and these transition of stress district 7 tapered structures, arc-shaped structure or more than one step-like structure are as Fig. 3.
Composite material inwall 1 ' form with composite material outer wall 1 fibreglass cloth and resin solidification, glass fabric be twin shaft to cloth, multiaxis to cloth, grid cloth, fibrofelt, carbon cloth, basalt fiber cloth or aryl fiber cloth, resin is unsaturated polyester (UP), vinylite, epoxy resin or inorganic resin.
Embodiment two.
Shown in Fig. 4,5.
Present embodiment is to have cancelled adpting flange 3 with the difference of implementing one.
Embodiment three.
As shown in Figure 6.
A kind of coal mine support post of composite material, the cylindrical shape structure that it is made up of cylindrical, massive paulownia wood body 8 and the composite material outer wall 1 that is wrapped in solid paulownia wood body 8 surfaces, its integral body is inferior bell shape structure, is formed with transition of stress district 7 in end and middle junction; Be connected with discoid or circular supporting surface adpting flange 6 at the two ends of cylindrical shape structure.
It is identical with embodiment one that present embodiment does not relate to part.
Embodiment four.
As shown in Figure 7.
Present embodiment and the difference of implementing one～three be it be by two (they also can be more than two) the support post of short same structure form the support post of a length than length by linking to each other at supporting surface adpting flange 6 places.
Specifically, composite material support post of the present utility model all in all, it is the sandwich circulus, referring to Fig. 1, circulus have the inside and outside wall 1 of composite material ', 1 and paulownia wood core 2, middle paulownia wood sandwich 2 is the rigidity of reinforced composite tube wall greatly, has solved the problem of its local buckling, and itself also has certain compressive strength.Support post generally by two semicircles (Fig. 2, or four 1/4 cylinders etc.) by flange 3 butt joints, be drilled with bolt hole 4 on the flange 3 at interval, after connecting by bolt 5, promptly form whole long cylinder.Single semicircle generally adopts hand to stick with paste technology or the preparation of vacuum introducing technology, and spliced whole coal mine roof plate supporting cylinder smooth in appearance is attractive in appearance; Also can adopt directly whole cylinder of preparation of winding process, this has just cancelled flange 3, can be ring-type sandwich structure (Fig. 4), also can directly twine fiber 1 on paulownia wood core 2, forms the cylindrical-shaped structure (Fig. 6) of fibrous composite constraint.The upper and lower end of every support post is provided with supporting surface flange 6, and the footpath of the post in the cylinder upper/lower terminal certain-length scope increases formation transition zone 7 gradually, guarantees the transition of stress and the stressed safety at support post two ends.Also available two sections short cylinders are connected into a support post (Fig. 7) by 6 pairs of flanges; The whole guard post elevation of drawing money on credit that two semicolumns are formed by connecting by flange 3 is referring to Fig. 3; The whole cylinder elevation that directly adopts the winding process preparation is referring to Fig. 5.
The inside and outside wall 1 of described fibrous composite is formed by glass fabric and resin solidification, glass fabric can adopt twin shaft to cloth, multiaxis to cloth, grid cloth, fibrofelt etc., special dimension also can adopt carbon cloth, basalt fiber cloth, aryl fiber cloth.Resin adopts unsaturated polyester (UP), vinylite, epoxy resin, inorganic resin.
Described core 2 is preferably paulownia wood, also can adopt sandwich materials such as other various light woods, hard polyurethane foams, PVC foam, PEI foam, PMI foam, burning into sand layer.
Described flange 3 is used for two semicylinder butt joints are combined into a cylinder, and flange is fiber and resin composite materials, also can increase the rigidity of flange at flange embedded set steel plate.
Described bolt hole 4 is holed on flange 3 at interval.
Described bolt 5 preferred high strength stainless steel bolts also can adopt common high-strength bolt or bolt zinc-plated or the antirust processing of chromium plating, or nylon bolt etc.
Described supporting surface flange 6 is fiber and resin composite materials, also can increase the rigidity of flange at flange embedded set steel plate; Supporting surface flange 6 can be diameter and also can be circular face more than or equal to the ring surface of cylinder external diameter.
Described transition zone 7 is that the post footpath in the cylinder upper/lower terminal certain-length scope increases the zone gradually, is fiber and resin composite materials.
Above-mentioned composite material support post adopts hand to stick with paste technology or vacuum introducing technology or winding shaping process preparation.
Example 1.
Composite material support post of the present utility model, it comprises the inside and outside wall 1 of four-axial glass fabric/vinylite composite material, the composite material wall thickness is 2mm; The middle paulownia wood sandwich 2 that adopts, thick 40mm, the external diameter of post are 700mm.The support post that 4m is high is spliced by flange 6 and bolt 5 by two sections high pillars of 2m, and every section high pillar of 2m is that two semicolumns form by flange 3 and bolt 5 butt joints.Every section high monolithic semicolumn of 2m adopts hand to stick with paste the technology preparation, 4 sections high monolithic semicolumns of 2m can be transported to colliery scene assembly unit, easy construction.
Example 2.
Composite material support post of the present utility model, it comprises the inside and outside wall 1 of carbon fiber/epoxy resin composite material, the composite material wall thickness is 1mm; Middle PVC foam core 2, the thick 30mm of adopting.The external diameter of post is 650mm, and the long post footpath of upper/lower terminal 30cm increases to 680mm gradually, forms transition zone 7, and column length 3.5m is that two semicolumns form by flange 3 and bolt 5 butt joints by the long semicylinder of two 3.5m, and the two ends of post are supporting surface flange 6.Every section high monolithic semicolumn of 3.5m adopts the preparation of vacuum introducing technology.
Example 3.
Composite material support post of the present utility model, it comprises the inside and outside wall 1 of basalt fibre/unsaturated polyester resin composite material, wall thickness is 3mm; Middle China fir sandwich 2, the thick 50mm of adopting.The external diameter of post is 550mm, and the long post footpath of upper/lower terminal 50cm increases to 600mm gradually, forms transition zone 7, column length 3m, and the two ends of post are supporting surface flange 6.This composite material support post adopts winding process or the preparation of vacuum guiding and forming technique Integratively, so cancelled abutted flange 3 and bolt 5.
The preparation method of above-mentioned composite material support post can adopt hand to stick with paste technology, vacuum guiding and forming technique or winding process preparation, is example with the vacuum guiding and forming technique, and idiographic flow is as follows:
A. the profile according to the coal mine support post monolithic semicylinder that will prepare prepares mould, and the material of mould can be steel mould, fiber reinforced plastic mold or wooden model tool;
B. the certain thickness glass fabric of lay, paulownia wood core 2, glass fabric successively on the semicircular pillar mould;
C. lay release cloth, flow-guiding cloth, vacuum bag and wind pipe equal vacuum consumptive material successively again, open vacuum pump after, vinylite promptly infiltrates in the vacuum die cavity under the atmospheric pressure effect automatically, solidify to form composite material inside and outside wall 1 with cloth;
D. 2 semicylinders are finished in preparation, with its butt joint, wherein be drilled with bolt hole 4 along flange 3 on the flange at interval, adopt high-strength bolt 5 will be combined into the cylindrical coal mine support post of complete composite material, its upper and lower cylinder end has transition zone 7, and upper/lower terminal has pivot flange.The utility model does not relate to the part prior art that maybe can adopt all same as the prior art to be realized.
Claims (7)
1. coal mine support post of composite material, it is characterized in that the hollow circuit cylinder body structure that it is monolithic hollow circuit cylinder body structure or has at least two arc plates to form, the shell wall of described hollow circuit cylinder body structure by composite material inwall (1 ') and composite material outer wall (1) and be installed in composite material inwall (1 ') and composite material outer wall (1) between sandwich material layer (2) form; Respectively be connected with one at the two ends of described hollow circular cylinder and be used for supporting surface adpting flange (6) continuous with roof supporting or that identical coal mine support post with another links to each other; The profile of each hollow circuit cylinder body structure is inferior bell shape, and the diameter at two ends is greater than the interlude diameter, and each end and interlude all are formed with transition of stress district (7).
2. coal mine support post according to claim 1, the both sides that it is characterized in that described arc plate all are connected with flange arrangement (3), its length direction of flange arrangement (3) upper edge offers a plurality of bolts hole (4), links to each other by the bolt (5) that passes bolt hole (4) between two adjacent two arc plates.
3. coal mine support post according to claim 1 is characterized in that described sandwich material layer (2) is paulownia wood, hard polyurethane foams, PVC foam, PEI foam, PMI foam or burning into sand layer.
4. coal mine support post according to claim 1, it is characterized in that described composite material inwall (1 ') and composite material outer wall (1) fibreglass cloth and resin solidification form, glass fabric be twin shaft to cloth, multiaxis to cloth, grid cloth, fibrofelt, carbon cloth, basalt fiber cloth or aryl fiber cloth, resin is unsaturated polyester (UP), vinylite, epoxy resin or inorganic resin.
5. coal mine support post according to claim 1 is characterized in that the tapered structure in described transition of stress district (7), arc-shaped structure or more than one step-like structure.
6. coal mine support post according to claim 1 is characterized in that described supporting surface adpting flange (6) is ring-type or the disk-like structure of diameter greater than hollow circuit cylinder body structure end diameter.
7. coal mine support post of composite material, it is characterized in that it is by cylindrical, massive paulownia wood body (8) be wrapped in the cylindrical shape structure that the composite material outer wall (1) on solid paulownia wood body (8) surface is formed, its integral body is inferior bell shape structure, is formed with transition of stress district (7) in end and middle junction; Be connected with discoid or circular supporting surface adpting flange (6) at the two ends of cylindrical shape structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202569064U CN201554472U (en) | 2009-11-10 | 2009-11-10 | Composite material coal mine support column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202569064U CN201554472U (en) | 2009-11-10 | 2009-11-10 | Composite material coal mine support column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201554472U true CN201554472U (en) | 2010-08-18 |
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ID=42614154
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202569064U Expired - Lifetime CN201554472U (en) | 2009-11-10 | 2009-11-10 | Composite material coal mine support column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201554472U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101718203B (en) * | 2009-11-10 | 2011-07-06 | 南京工业大学 | Composite material coal mine support column |
| CN110630298A (en) * | 2019-09-06 | 2019-12-31 | 山东鑫天河新材料科技有限公司 | Mining prop based on high polymer composite material, preparation device and method and application thereof |
-
2009
- 2009-11-10 CN CN2009202569064U patent/CN201554472U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101718203B (en) * | 2009-11-10 | 2011-07-06 | 南京工业大学 | Composite material coal mine support column |
| CN110630298A (en) * | 2019-09-06 | 2019-12-31 | 山东鑫天河新材料科技有限公司 | Mining prop based on high polymer composite material, preparation device and method and application thereof |
| CN110630298B (en) * | 2019-09-06 | 2023-10-20 | 山东鑫天河新材料科技有限公司 | Mining support based on polymer composite material, preparation device and method and application thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100818 Effective date of abandoning: 20091110 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20100818 Effective date of abandoning: 20091110 |