CN201517370U - Adjustable drill bit of multidirectional soil-cement mixed pile - Google Patents
Adjustable drill bit of multidirectional soil-cement mixed pile Download PDFInfo
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- CN201517370U CN201517370U CN2009200879992U CN200920087999U CN201517370U CN 201517370 U CN201517370 U CN 201517370U CN 2009200879992 U CN2009200879992 U CN 2009200879992U CN 200920087999 U CN200920087999 U CN 200920087999U CN 201517370 U CN201517370 U CN 201517370U
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Abstract
The utility model provides an adjustable drill bit of a multidirectional soil-cement mixed pile, which includes an outer drill stem, an inner drill stem, an outer drill bit blade, an inner drill bit blade, an inner drill bit, an inner drill bit nozzle, a centering drill bit, a diverter valve, a diverter loop and an outer drill bit nozzle, wherein the outer drill bit blade is fixedly connected with the outer drill stem, the inner drill bit blade is fixedly connected with the inner drill bit, the centering drill bit is arranged at the lower end of the inner drill bit, the diverter valve is mounted in the inner drill stem and the inner drill bit, and an outer drill bit nozzle is arranged on the outer drill stem. When the drill bit drills downwards, the lower end nozzle injects cement slurry; and when the drill bit lifts upwards and stirs, the upper end nozzle injects cement slurry under the action of the diverter valve, ,so that upper and lower slurry channels are adjustable. In addition, under the forcing stir action of mutual extrusion formed by different cutting angles of bidirectional stirring blades, the utility model solves the problem that the soil body stirred around a stirring shaft rotates along with the stirring shaft, improves the uniformity of the soil-cement mixed pile body, overcomes the up injection of cement slurry, and ensures the whole quality of the pile body.
Description
Technical field
The utility model relates to a kind of cement-soil mixing pile machine tool drill bit of the realm of building construction, particularly relates to the adjustable drill bit of multidirectional cement mixing method.
Background technology
Cement mixing method now is widely used in railway, highway and civil building field.But cement mixing method makes load can not effectively be delivered to the pile body bottom because pile strength is low, has influenced the application of cement mixing method.Cement paste and bury mix the pile body uniformity of the stirring pile body that forms, the intensity of decision pile body and the consolidation effect of ground.
Number of patent application is 200810197379.4 multi-direction multi-shaft stirring concrete earth pile machine, a kind of multi-direction multi-shaft stirring concrete earth pile machine is provided, comprise fuselage, motor, gearbox, it is characterized in that: also comprise positive and negative case, rotating disk, outer drilling rod, interior drilling rod, transmission case stirs drill bit and the interior drill bit that stirs outward; Motor main shaft is connected with the driving wheel of gearbox; The driven pulley of gearbox is connected with the driving wheel of positive and negative case; The driven pulley of positive and negative case is connected with rotating disk by power transmission shaft; It is coaxial with rotating disk that outer drilling rod passes rotating disk; Interior drilling rod passes the centre bore of outer drilling rod; Driving wheel in the transmission case is connected with outer drilling rod, and reverse wheel rotates by drilling rod in driving with interior drilling rod gears engaged; The outer drill bit that stirs is fixed on the outer drilling rod; The interior drill bit that stirs is fixed on the interior drilling rod; Transmission case is positioned at outer drilling rod top; Motor is positioned at the underframe position of fuselage.The present invention mixes the pile body uniformity effect of improving of the stirring pile body that forms to cement paste and bury.
But by research to Deep Mixing Piles Construction, an outstanding problem that influences pile strength is that stirring is inhomogeneous, the soil body that stirs pine around the shaft rotates with shaft, and cement grout is with the space of stirring the body that loosens the soil, prolong on the shaft and scurry, form the aperture and emit slurry, cause cement paste evenly not mix, influenced pile quality with bury.Multi-direction multi-shaft stirring concrete earth pile machine has overcome above-mentioned deficiency under the pressure stirring action of multidirectional, multiaxis stirring vane, improved pile quality.But drill bit that this machine is joined is a single lower end nozzle-type, when creeping into downwards, and institute's spraying cement slurries, all can be through the abundant stirring of top multilayer blade, and upwards promote when stirring, the small amount of cement slurries that sprayed place the drill bit lower end because of stirring vane, then fail to stir fully.
Summary of the invention
The purpose of this utility model provides the adjustable drill bit of a kind of multidirectional cement mixing method, the adjustable drill bit of this multidirectional cement mixing method uses on multi-direction multi-shaft stirring concrete earth pile machine, stir the problem that the loose soil body rotates with shaft around effectively solving shaft, and under the pressure stirring action of the mutual extrusion that the different cutting angles of two-way multilayer stirring vane form, improve the uniformity of cement mixing method pile body, overcome cement grout on emit, improve to guarantee the total quality of pile body.
In order to achieve the above object, the adjustable drill bit of multidirectional cement mixing method of the present utility model, comprise outer drilling rod, interior drilling rod, outer bit blades, interior bit blades, interior drill bit and interior bit nozzle, it is characterized in that: also comprise pilot bit, diaphragm valve, water conservancy diversion ring set and outer bit nozzle;
Outer bit blades is vertical with outer drilling rod and fixedly connected with outer drilling rod, its blade evenly divides outside around the drilling rod, interior bit blades is vertical with interior drill bit and fixedly connected with interior drill bit, its blade evenly divides around interior drill bit, interior drilling rod is outside in the drilling rod, between interior drilling rod and the outer drilling rod sealing ring is arranged, fixedly connected with interior drill bit in interior drilling rod lower end, there is pilot bit interior drill bit lower end, in interior drilling rod and interior drill bit diaphragm valve is installed, fixedly connected with the diaphragm valve lower end in the pilot bit upper end, outer bit nozzle is arranged on the outer drilling rod, interior bit nozzle is arranged on the interior drill bit, interior drilling rod and outside the water conservancy diversion ring set is installed between the drilling rod.
Described diaphragm valve is the quill shaft member, and its radial direction has the hole, and the effect in hole is when work, and cement grout to the water conservancy diversion ring set, flows to outer bit nozzle by the water conservancy diversion ring set by this orifice flow again.
Described pilot bit lower end is pointed for awl, and the upper end is a quill shaft, and quill shaft radially has the hole, and the effect in its hole is that cement grout is by the inside bit nozzle of this orifice flow when work.
Described water conservancy diversion ring set is an annular component, the inside and outside annular groove that has, porose connection between the inner and outer rings connected in star.
Described outer bit nozzle is a hollow member, and outer bit nozzle is vertical with outer drilling rod, and an end is fixedlyed connected with outer drilling rod, and its hole is communicated with water conservancy diversion ring set outer ring groove.
Bit nozzle is a hollow member in described, and interior bit nozzle is vertical with interior drill bit, and an end is fixedlyed connected with interior drill bit.
Described outer bit blades is bilayer or multilayer.
There is interior bit nozzle the lower end of the adjustable drill bit of multidirectional cement mixing method, there is outer bit nozzle the upper end, when creeping into downwards by the interior bit nozzle gunite of lower end, and upwards promote when stirring, under the effect of diaphragm valve, change outer bit nozzle whitewashing, realize the adjustable of upper and lower slurry channels by the upper end, make down brill and on carry that cement grout all can stir fully when creeping into.Thereby stir the problem that the loose soil body rotates with shaft around effectively solving shaft, and under the pressure stirring action of the mutual extrusion that the different cutting angles of two-way multilayer stirring vane form, improve the uniformity of cement mixing method pile body, overcome cement grout on emit, improve to guarantee the total quality of pile body.
In work progress, when multidirectional agitation pile crept into downwards, its cement paste was through the endoporus of the interior drilling rod endoporus to interior drill bit, again by interior bit nozzle ejection, cement grout, makes and mixes and stirs fully with cutting soil under the effect that multidirectional revolution is stirred through the multilayer blade on its top; Creep into end when downwards, promote when upwards stirring construction, the pilot bit outside is subjected to the reaction force that soil body extruding forms, diaphragm valve in driving in the drill bit moves down, and this moment, diaphragm valve in the whitewashing passage, was opened the slurry channels of upper end blade under sealing, cement flow is to the water conservancy diversion ring set, flow to outer bit nozzle by the water conservancy diversion ring set again, realize that the outer bit nozzle of upper end is whitewashed, the blade that makes lower floor stirs when proposing operation fully last.Bore down whitewashing down by multidirectional cement mixing method, on stir whitewashing, make cement and soil stir more fully, overcome the whitewashing of conventional soil cement agitation pile deep layer and stirred uneven deficiency, solved the problem of overflowing and starch in the aperture, improved the intensity of agitation pile, reduced influence surrounding environment.
The use of the adjustable drill bit of the multidirectional cement mixing method of the utility model, stir the problem that the loose soil body rotates with shaft around effectively solving shaft, and under the pressure stirring action of the mutual extrusion that the different cutting angles of two-way multilayer stirring vane form, improve the uniformity of cement mixing method pile body, overcome cement grout on emit, improve to guarantee the total quality of pile body, simple in structure, easy to use, economical and practical.
Description of drawings
Fig. 1 is that the adjustable drill bit of the utility model embodiment creeps into the stirring schematic diagram downwards.
Fig. 2 upwards creeps into the stirring schematic diagram.
Fig. 3 is the vertical view of Fig. 1.
Fig. 4 is the structural representation of water conservancy diversion ring set.
The specific embodiment
The explanation of Fig. 1 mark: outer drilling rod 1, interior drilling rod 2, sealing ring 3, water conservancy diversion ring set 4, outer bit nozzle 5, diaphragm valve 6, interior drill bit 7, interior bit nozzle 8, pilot bit 9.
The explanation of Fig. 3 mark: outer bit blades 10, interior bit blades 11.
Referring to Fig. 1, the embodiment of the adjustable drill bit of multidirectional cement mixing method of the present utility model comprises outer drilling rod 1, interior drilling rod 2, outer bit blades 10, interior bit blades 11, interior drill bit 7, interior bit nozzle 8, also comprises pilot bit 9, diaphragm valve 6, water conservancy diversion ring set 4 and outer bit nozzle 5.
Diaphragm valve 6 is the quill shaft member, and its radial direction has the hole, and the effect in hole is when work, and cement grout to water conservancy diversion ring set 4, flows to outer bit nozzle 5 by water conservancy diversion ring set 4 by this orifice flow again.
Referring to Fig. 4, water conservancy diversion ring set 4 is an annular component, the inside and outside annular groove that has, porose connection between the inner and outer rings connected in star.
Outer bit nozzle 5 is a hollow member, and outer bit nozzle 5 is vertical with outer drilling rod 1, and an end is fixedlyed connected with outer drilling rod 1, and its hole is communicated with water conservancy diversion ring set 4 outer ring grooves.
Interior bit nozzle 8 is a hollow member, and interior bit nozzle 8 is vertical with interior drill bit 7, and an end is fixedlyed connected with interior drill bit 7.
Present embodiment China and foreign countries bit blades 10 is double-deck.
In work progress, the adjustable drill bit of multidirectional cement mixing method is installed on the multidirectional cement-soil mixing pile machine, when multidirectional agitation pile creeps into downwards, its cement paste arrives the endoporus of interior drill bit 7 through the endoporus of interior drilling rod 2, again by interior bit nozzle 8 ejections, cement grout, makes and mixes and stirs fully with cutting soil under the effect that multidirectional revolution is stirred through the multilayer blade on its top; Creep into end when downwards, promote when upwards stirring construction, pilot bit 9 outsides are subjected to the reaction force that soil body extruding forms, and the diaphragm valve 6 in driving in the drill bit moves down, referring to Fig. 2, this moment diaphragm valve 6 the sealing under the whitewashing passage in, open the slurry channels of upper end blade, cement flow flows to outer bit nozzle 5 by water conservancy diversion ring set 4 again to water conservancy diversion ring set 4, realize outer bit nozzle 5 whitewashings of upper end, the blade that makes lower floor stirs when proposing operation fully last.Bore down whitewashing down by multidirectional cement mixing method, on stir whitewashing, make cement and soil stir more fully, overcome the whitewashing of conventional soil cement agitation pile deep layer and stirred uneven deficiency, solved the problem of overflowing and starch in the aperture, improved the intensity of agitation pile, reduced influence surrounding environment.
The use of the adjustable drill bit of the multidirectional cement mixing method of the utility model, stir the problem that the loose soil body rotates with shaft around effectively solving shaft, and under the pressure stirring action of the mutual extrusion that the different cutting angles of two-way multilayer stirring vane form, improve the uniformity of cement mixing method pile body, overcome cement grout on emit, improve the total quality that guarantees pile body, simple in structure, easy to use, economical and practical, promoting the use of of it has positive effect to improving workmanship.
Claims (6)
1. the adjustable drill bit of multidirectional cement mixing method comprises outer drilling rod, interior drilling rod, outer bit blades, interior bit blades, interior drill bit and interior bit nozzle, it is characterized in that: also comprise pilot bit, diaphragm valve, water conservancy diversion ring set and outer bit nozzle;
Outer bit blades is vertical with outer drilling rod and fixedly connected with outer drilling rod, its blade evenly divides outside around the drilling rod, interior bit blades is vertical with interior drill bit and fixedly connected with interior drill bit, its blade evenly divides around interior drill bit, interior drilling rod is outside in the drilling rod, between interior drilling rod and the outer drilling rod sealing ring is arranged, fixedly connected with interior drill bit in interior drilling rod lower end, there is pilot bit interior drill bit lower end, in interior drilling rod and interior drill bit diaphragm valve is installed, fixedly connected with the diaphragm valve lower end in the pilot bit upper end, outer bit nozzle is arranged on the outer drilling rod, interior bit nozzle is arranged on the interior drill bit, interior drilling rod and outside the water conservancy diversion ring set is installed between the drilling rod.
2. the adjustable drill bit of multidirectional cement mixing method according to claim 1 is characterized in that: diaphragm valve is the quill shaft member, and its radial direction has the hole.
3. the adjustable drill bit of multidirectional cement mixing method according to claim 1 is characterized in that: the pilot bit lower end is pointed for awl, and the upper end is a quill shaft, and quill shaft radially has the hole.
4. the adjustable drill bit of multidirectional cement mixing method according to claim 1 is characterized in that: the water conservancy diversion ring set is an annular component, the inside and outside annular groove that has, porose connection between the inner and outer rings connected in star.
5. the adjustable drill bit of multidirectional cement mixing method according to claim 1 is characterized in that: outer bit nozzle is a hollow member.
6. the adjustable drill bit of multidirectional cement mixing method according to claim 1 is characterized in that: outer bit blades is bilayer or multilayer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200879992U CN201517370U (en) | 2009-08-12 | 2009-08-12 | Adjustable drill bit of multidirectional soil-cement mixed pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200879992U CN201517370U (en) | 2009-08-12 | 2009-08-12 | Adjustable drill bit of multidirectional soil-cement mixed pile |
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| Publication Number | Publication Date |
|---|---|
| CN201517370U true CN201517370U (en) | 2010-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009200879992U Expired - Fee Related CN201517370U (en) | 2009-08-12 | 2009-08-12 | Adjustable drill bit of multidirectional soil-cement mixed pile |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102505683A (en) * | 2011-11-11 | 2012-06-20 | 刘松玉 | Drilling tool for two-way soil-cement mixed pile |
| CN104032733A (en) * | 2013-03-06 | 2014-09-10 | 上海城地建设股份有限公司 | Cement soil mixing pile device capable of switching up and down to spray slurry and construction method |
| CN104563124A (en) * | 2013-10-29 | 2015-04-29 | 上海城地建设股份有限公司 | Cement-soil mixing pile device capable of vertically converting for spraying slurry and operation method of cement-soil mixing pile device |
| CN104674798A (en) * | 2013-11-27 | 2015-06-03 | 上海城地建设股份有限公司 | Construction method for non-replacement and up-and-down convertible spouting five-shaft cement mixing pile |
| CN104674797A (en) * | 2013-11-27 | 2015-06-03 | 上海城地建设股份有限公司 | Construction method for five-shaft cement mixing pile without squeezing soil |
| CN106677172A (en) * | 2017-02-09 | 2017-05-17 | 徐玉杰 | Once pile formation multi-blade pile machine |
| CN106930702A (en) * | 2017-04-21 | 2017-07-07 | 浙江省水利水电勘测设计院 | A kind of bit system of tree root mixing pile |
| CN107165162A (en) * | 2017-06-22 | 2017-09-15 | 吴应寿 | The multidirectional jet cement-soil mixing pile machine of multiaxis and the multidirectional cement-soil mixing pile machine of single shaft |
| CN108643845A (en) * | 2018-06-07 | 2018-10-12 | 中交二航局第二工程有限公司 | Jackrod structure for two-way cement mixing pile |
| CN108909325A (en) * | 2016-12-13 | 2018-11-30 | 王国涛 | A kind of separate type drill bit |
| CN109718712A (en) * | 2019-03-06 | 2019-05-07 | 潍坊鑫起机械科技有限公司 | A kind of agitating shaft with stirring and grinding function |
| CN110258544A (en) * | 2019-07-26 | 2019-09-20 | 北京中岩大地科技股份有限公司 | The stirring drill bit of deep-layer stirring is realized based on drop resistance mode |
| CN112227958A (en) * | 2020-10-09 | 2021-01-15 | 山东省机械施工有限公司 | Construction method of stirring swing-spraying combined type cement anti-seepage wall |
| CN112921959A (en) * | 2021-01-29 | 2021-06-08 | 中建协和建设有限公司 | Double-shaft bidirectional cement mixing pile construction equipment and cement mixing pile construction method |
| CN113718762A (en) * | 2021-09-09 | 2021-11-30 | 浙江浩达基础工程有限公司 | Single-channel cement stirring pile head with bidirectional discharge port |
| CN114607282A (en) * | 2022-03-30 | 2022-06-10 | 山东高速建设管理集团有限公司 | Construction drill bit and method capable of constructing polymorphic cement soil mixing pile |
| CN114875902A (en) * | 2022-05-26 | 2022-08-09 | 广东建联建筑设计有限公司 | Multistage cement mixing stake supporting construction |
| CN114908740A (en) * | 2022-04-29 | 2022-08-16 | 天津建工城市建设发展有限公司 | Operation method of mixing pile |
| CN115262559A (en) * | 2022-07-29 | 2022-11-01 | 东南大学 | Stirring device design parameter optimization method, stirring device and contaminated soil pile forming method |
| CN115369863A (en) * | 2022-09-23 | 2022-11-22 | 同济大学 | In-situ soil and underground water remediation method adopting double-pipe double-channel liquid adding, powder spraying and stirring |
| CN115488144A (en) * | 2022-09-23 | 2022-12-20 | 同济大学 | In-situ repair device and equipment for double-pipe double-channel liquid adding, powder spraying and stirring |
-
2009
- 2009-08-12 CN CN2009200879992U patent/CN201517370U/en not_active Expired - Fee Related
Cited By (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102505683B (en) * | 2011-11-11 | 2013-12-25 | 刘松玉 | Drilling tool for two-way soil-cement mixed pile |
| CN102505683A (en) * | 2011-11-11 | 2012-06-20 | 刘松玉 | Drilling tool for two-way soil-cement mixed pile |
| CN104032733A (en) * | 2013-03-06 | 2014-09-10 | 上海城地建设股份有限公司 | Cement soil mixing pile device capable of switching up and down to spray slurry and construction method |
| CN104032733B (en) * | 2013-03-06 | 2018-12-28 | 上海城地建设股份有限公司 | A kind of cement-soil mixing pile device that can convert whitewashing up and down |
| CN104563124A (en) * | 2013-10-29 | 2015-04-29 | 上海城地建设股份有限公司 | Cement-soil mixing pile device capable of vertically converting for spraying slurry and operation method of cement-soil mixing pile device |
| CN104674798A (en) * | 2013-11-27 | 2015-06-03 | 上海城地建设股份有限公司 | Construction method for non-replacement and up-and-down convertible spouting five-shaft cement mixing pile |
| CN104674797A (en) * | 2013-11-27 | 2015-06-03 | 上海城地建设股份有限公司 | Construction method for five-shaft cement mixing pile without squeezing soil |
| CN108909325A (en) * | 2016-12-13 | 2018-11-30 | 王国涛 | A kind of separate type drill bit |
| CN108909325B (en) * | 2016-12-13 | 2019-11-26 | 应剑军 | A kind of separate type drill bit |
| CN106677172A (en) * | 2017-02-09 | 2017-05-17 | 徐玉杰 | Once pile formation multi-blade pile machine |
| CN106930702A (en) * | 2017-04-21 | 2017-07-07 | 浙江省水利水电勘测设计院 | A kind of bit system of tree root mixing pile |
| CN106930702B (en) * | 2017-04-21 | 2023-08-11 | 浙江省水利水电勘测设计院有限责任公司 | Drill bit system of root-shaped mixing pile |
| CN107165162A (en) * | 2017-06-22 | 2017-09-15 | 吴应寿 | The multidirectional jet cement-soil mixing pile machine of multiaxis and the multidirectional cement-soil mixing pile machine of single shaft |
| CN108643845A (en) * | 2018-06-07 | 2018-10-12 | 中交二航局第二工程有限公司 | Jackrod structure for two-way cement mixing pile |
| CN109718712A (en) * | 2019-03-06 | 2019-05-07 | 潍坊鑫起机械科技有限公司 | A kind of agitating shaft with stirring and grinding function |
| CN109718712B (en) * | 2019-03-06 | 2022-11-29 | 宜昌天仁药业有限责任公司 | Stirring shaft with stirring and grinding functions |
| CN110258544A (en) * | 2019-07-26 | 2019-09-20 | 北京中岩大地科技股份有限公司 | The stirring drill bit of deep-layer stirring is realized based on drop resistance mode |
| CN112227958A (en) * | 2020-10-09 | 2021-01-15 | 山东省机械施工有限公司 | Construction method of stirring swing-spraying combined type cement anti-seepage wall |
| CN112921959A (en) * | 2021-01-29 | 2021-06-08 | 中建协和建设有限公司 | Double-shaft bidirectional cement mixing pile construction equipment and cement mixing pile construction method |
| CN113718762A (en) * | 2021-09-09 | 2021-11-30 | 浙江浩达基础工程有限公司 | Single-channel cement stirring pile head with bidirectional discharge port |
| CN113718762B (en) * | 2021-09-09 | 2022-08-09 | 浙江浩达基础工程有限公司 | Single-channel cement stirring pile head with bidirectional discharge port |
| CN114607282B (en) * | 2022-03-30 | 2023-12-01 | 山东高速建设管理集团有限公司 | Construction drill bit and method capable of constructing polymorphic cement-soil mixing pile |
| CN114607282A (en) * | 2022-03-30 | 2022-06-10 | 山东高速建设管理集团有限公司 | Construction drill bit and method capable of constructing polymorphic cement soil mixing pile |
| CN114908740A (en) * | 2022-04-29 | 2022-08-16 | 天津建工城市建设发展有限公司 | Operation method of mixing pile |
| CN114875902A (en) * | 2022-05-26 | 2022-08-09 | 广东建联建筑设计有限公司 | Multistage cement mixing stake supporting construction |
| CN115262559A (en) * | 2022-07-29 | 2022-11-01 | 东南大学 | Stirring device design parameter optimization method, stirring device and contaminated soil pile forming method |
| CN115262559B (en) * | 2022-07-29 | 2024-02-13 | 东南大学 | Design parameter optimization method for stirring device, stirring device and contaminated soil piling method |
| CN115488144A (en) * | 2022-09-23 | 2022-12-20 | 同济大学 | In-situ repair device and equipment for double-pipe double-channel liquid adding, powder spraying and stirring |
| CN115369863A (en) * | 2022-09-23 | 2022-11-22 | 同济大学 | In-situ soil and underground water remediation method adopting double-pipe double-channel liquid adding, powder spraying and stirring |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 430062, Wuhan City, Hubei province Wuchang District 158 East Avenue, D classic building, room 1802 Patentee after: Wuhan Qiancheng Piling Technology Co., Ltd. Address before: 430062, Wuhan City, Hubei province Wuchang District 158 East Avenue, D classic building, room 1802 Patentee before: Wuhan High Iron Pickets Work Technology Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100630 Termination date: 20180812 |