CN102155169A - Extension bar and long spiral drilling machine using same - Google Patents
Extension bar and long spiral drilling machine using same Download PDFInfo
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- CN102155169A CN102155169A CN2011100897719A CN201110089771A CN102155169A CN 102155169 A CN102155169 A CN 102155169A CN 2011100897719 A CN2011100897719 A CN 2011100897719A CN 201110089771 A CN201110089771 A CN 201110089771A CN 102155169 A CN102155169 A CN 102155169A
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Abstract
The invention relates to an extension bar and a long spiral drilling machine using the same. The extension bar is a straight bar and vertically arranged when in use; a through hole for pouring concrete is arranged axially on the extension bar; at least one key slot is vertically arranged on the circumferential surface of the extension bar; the key slot comprises a left slot wall and a right slot wall which are vertically arranged at intervals; the two ends of the left slot wall in the vertical direction are provided with an upper torque input section and a lower torque input section for inputting torque respectively; the upper end of the lower torque input section of the extension bar is provided with a lower block structure for preventing a power output key from sliding vertically; a gap that the power output key passes through vertically is arranged between the block structure and the right slot wall; and the lower end of the extension bar is provided with a spiral drill rod assembly end for assembling a long spiral drill rod. Through the invention, the effective drilling depth of the existing long spiral drilling machine is increased without heightening the drilling tower.
Description
Technical field
The present invention relates to the piling machinery field, relate in particular to a kind of extension bar and use the long-spiral drilling machine of this extension bar.
Background technology
Be accompanied by urban construction of China and the continuous development that high ferro is built, the base construction of stake building site obtains pulling, floor is more and more higher, require the degree of depth of stake also more and more darker, what penetration rate was at present the fastest is long-spiral drilling machine and rotary drilling rig, according to Chinese patent 200920258714.7 disclosed a kind of " long-spiral drilling machine ", this spiral drilling machine comprises chassis assembly, this chassis assembly has walking mechanism and rotary table, described walking mechanism is a hydraulic walking mechanism, described rotary table is the hydraulic gyration workbench, described rotary table is provided with boring tower, a driver's cabin and a rack device etc., be equipped with unit head on the boring tower, unit head can be done the oscilaltion campaign along body of the tower, long screw drill rod is installed on the unit head, also be provided with motor-driven hydraulic pump on the described rotary table, hydraulic motor is installed on the unit head, the clutch end of hydraulic pump and the power intake of hydraulic motor are in transmission connection, the clutch end of hydraulic motor and the power intake of unit head are in transmission connection, long-spiral drilling machine is once to bore down to bore soil continuously after desired depth, begin to use pump, Grouting Pipe is by drill pipe bore slip casting inward, Kelly Stubb portals and promptly finishes boring, and the shortcoming of existing long-spiral drilling machine is: the boring tower height of long-spiral drilling machine must be greater than more than 2.8 meters of hole depth, thereby the drilling depth of traditional long-spiral drilling machine is subjected to the serious restriction of boring tower height, at present, drilling depth generally is no more than 30 meters, if stake is dark again, a kind of method is to reach the dark requirement of brill by increasing the boring tower height, must increase simultaneously the diameter of boring tower, strengthen platform, increase counterweight, increase the stability that conditions such as support oil cylinder and diagonal brace oil cylinder satisfy complete machine, will cause complete machine heavy more like this, move inconvenience, the problem that cost increases; Another kind method adopts to revolve exactly digs brill, but because rotary drilling rig costs an arm and a leg, can cause the high problem of cost of production.
Summary of the invention
The object of the present invention is to provide a kind of extension bar, dark with the effective brill that increases existing long-spiral drilling machine, the present invention also aims to provide a kind of long-spiral drilling machine that uses this extension bar.
In order to address the above problem, the technical scheme of a kind of extension bar of the present invention is:
A kind of extension bar, described extension bar vertically is provided with when being straight-bar and use, described lengthening axially has the through hole that is used for concrete perfusion along it, vertically offer at least one keyway on the side face of described extension bar, described keyway comprises left cell wall and the right cell wall that vertically is provided with at interval, described left cell wall two ends vertically are respectively arranged with last moment of torsion input section and the following moment of torsion input section that is used for the moment of torsion input, described extension bar is provided with in the following upper end of moment of torsion input section and is used to the lower gear structure that stops the power run-out key vertically to slide, be provided with between described gear structure and described right cell wall and be used for the gap that the power run-out key vertically passes, the lower end of described extension bar is provided with the auger stem assembling end that is used for the long screw drill rod assembling.
Under the below of last moment of torsion input section be provided with towards right cell wall direction extension and be used to the last gear structure that stops the power run-out key vertically to slide, the described gear structure that goes up is for radially to extend the last gear block of setting along extension bar, described lower gear structure is for radially to extend the lower gear piece of setting along extension bar, and described upward gear block and lower gear interblock vertically are provided with and are used for the left feather key bar that the power run-out key vertically slides.
Described keyway circumferentially is evenly equipped with three along extension bar, described extension bar also comprises and is used for the right feather key bar that the power run-out key vertically slides, described right cell wall is the sidewall of right feather key bar, the described moment of torsion input section that goes up is provided with the last key bar that is used for power run-out key transfer torque, the described input of moment of torsion down section is provided with the following key bar that is used for power run-out key transfer torque, has been horizontally disposed with reinforcing rib between the left feather key bar of described adjacent keyway and right feather key.
The upper end of described extension bar is provided with the concrete input that is used for the concrete input, and described concrete input is provided with and is used for the swivel coupling that Grouting Pipe connects.
The technical scheme of long-spiral drilling machine of the present invention is:
Comprise chassis assembly, described chassis assembly comprises walking mechanism and rotary table, described rotary table is provided with boring tower, the dynamic head of slidable fit vertically on the described boring tower, described unit head is provided with the pilot hole that is used for the extension bar inserting, the inner peripheral surface of described pilot hole is provided with at least two power run-out keies towards the side extension of the pilot hole hole heart, described extension bar vertically is provided with when being straight-bar and use, described lengthening axially has the through hole that is used for concrete perfusion along it, vertically offer at least one keyway on the side face of described extension bar, described keyway comprises left cell wall and the right cell wall that vertically is provided with at interval, described left cell wall two ends vertically are respectively arranged with last moment of torsion input section and the following moment of torsion input section that is used for the moment of torsion input, described extension bar is provided with in the following upper end of moment of torsion input section and is used to the lower gear structure that stops the power run-out key vertically to slide, be provided with between described gear structure and described right cell wall and be used for the gap that the power run-out key vertically passes, the lower end of described extension bar is provided with the auger stem assembling end that is used for the long screw drill rod assembling.
Described keyway circumferentially is evenly equipped with three along extension bar, under the below of last moment of torsion input section be provided with towards right cell wall direction extension and be used to the last gear structure that stops the power run-out key vertically to slide, the described gear structure that goes up is for radially to extend the last gear block of setting along extension bar, described lower gear structure is for radially to extend the lower gear piece of setting along extension bar, and described upward gear block and lower gear interblock vertically are provided with and are used for the feather key bar that the power run-out key vertically slides.
Described keyway circumferentially is evenly equipped with three along extension bar, described extension bar also comprises and is used for the right feather key bar that the power run-out key vertically slides, described right cell wall is the sidewall of right feather key bar, the described moment of torsion input section that goes up is provided with the last key bar that is used for power run-out key transfer torque, and the described section of moment of torsion input down is provided with the following key bar that is used for power run-out key transfer torque.
The upper end of described extension bar is provided with the concrete input that is used for the concrete input, and described concrete input is provided with and is used for the swivel coupling that Grouting Pipe connects.
Described unit head top vertically is provided with the support limit bar that is used for the Grouting Pipe support limit, connect by linking arm between described extension bar and the support limit bar, one end of described linking arm is arranged on the described swivel coupling, described linking arm away from an end slidable fit of extension bar on described support limit bar.
The auger stem assembling end of described extension bar is connected by the adapter flange transition with long screw drill rod.
Beneficial effect of the present invention is: the present invention is by providing the long-spiral drilling machine of a kind of extension bar and this extension bar of use, vertically have keyway on the side face of this extension bar, the top and bottom of keyway are respectively equipped with last moment of torsion input section and the following moment of torsion input section that is used for the output of unit head moment of torsion, the moment of torsion run-out key of unit head is by with last, the key of following moment of torsion input section cooperates transfer torque, above following moment of torsion input section, be provided with the lower gear structure that is used to promote extension bar, the moment of torsion run-out key of unit head can vertically slide up and down along keyway, it is dark to realize increasing effective brill by the working region that changes unit head, come extension bar and auger stem are promoted by the lower gear structure, under the situation that does not increase the boring tower height, it is dark to utilize extension bar to increase effective brill of long-spiral drilling machine.
Description of drawings
Fig. 1 is the structural representation of extension bar embodiment of the present invention;
Fig. 2 is the structural representation of long-spiral drilling machine embodiment of the present invention;
Fig. 3 is the structural representation of Fig. 2 medium power head;
Fig. 4 is the vertical view of Fig. 3;
Fig. 5 is the left view of Fig. 3.
Fig. 6 is that the moment of torsion run-out key of Fig. 2 medium power head cooperates schematic diagram with the keyway of extension bar.
The specific embodiment
A kind of extension bar embodiment is as shown in Figure 1: described extension bar 2 axially offers the through hole that is used for concrete perfusion along it, described extension bar 2 vertically is provided with when being straight-bar and use, vertically offer at least one keyway 48 on the side face of described extension bar 2, in the present embodiment, described keyway 48 circumferentially is evenly equipped with three along extension bar 2, in other embodiments of the invention, keyway 48 also can be two, four etc. a plurality of, described keyway 48 comprises left cell wall and the right cell wall 40 that vertically is provided with at interval, right cell wall 40 is a sidewall of right feather key bar, described left cell wall two ends vertically are respectively arranged with last moment of torsion input section 30 and the following moment of torsion input section 36 that is used for the moment of torsion input, the described moment of torsion input section 30 that goes up is provided with the last key bar 31 that is used for power run-out key 20 transfer torques, the described input of moment of torsion down section 36 is provided with the following key bar 38 that is used for power run-out key 20 transfer torques, described extension bar 2 is provided with in the following upper end of moment of torsion input section 36 and is used to the lower gear structure that stops power run-out key 20 vertically to slide, described lower end of going up moment of torsion input section 30 is provided with towards a side of right cell wall 40 and is used to the last gear structure that stops power run-out key 20 vertically to slide, in the present embodiment, the described gear structure that goes up is the last gear block 32 that is connected with last key bar 31, described lower gear structure is the lower gear piece 35 that is connected with following key bar 38, in other embodiments of the invention, on described, the lower gear piece also can be independent of, following key bar is provided with, be provided with between described lower gear piece 35 described right cell walls and be used for the gap that power run-out key 20 vertically passes, described upward gear block 32 and 35 of lower gear pieces vertically are provided with and are used for the left feather key bar 33 that power run-out key 20 vertically slides, described keyway 48 is by last key bar 31, last 32 gear blocks, left side feather key bar 31, following key bar 38 and right feather key bar surround, be horizontally disposed with reinforcing rib 34 between the left feather key bar 33 of described adjacent keyway and right feather key bar, the lower end of described extension bar 2 is provided with the auger stem assembling end that is used for long screw drill rod 5 assemblings, the upper end of described extension bar 2 is provided with and is used for the concrete input that concrete pours into, described concrete input is provided with the swivel coupling 42 that is used for Grouting Pipe connection 44, the concrete input of described extension bar 2 rotates by bearing and is assemblied on the described swivel coupling 42, when this structure can be implemented in rig work, extension bar 2 then swivel coupling 42 do not change, and promptly Grouting Pipe 44 is not changeed.
Long-spiral drilling machine embodiment is shown in Fig. 2-6: this long-spiral drilling machine comprises chassis assembly, this chassis assembly has walking mechanism 11 and rotary table 8, this rotary table 8 is provided with boring tower 6, support 18 is used to guarantee to strengthen the stability of boring tower 6, this rig comprises unit head 3 and is used to increase the dark extension bar of effective brill 2, described unit head 3 by pawl leg assembly 24 vertically slidable fit on boring tower 6, described unit head 3 is provided with the moment of torsion output that is used for moment of torsion output, described moment of torsion output is provided with the pilot hole 21 that is used for extension bar 2 insertings, cooperate transfer torque by key between described moment of torsion output and the extension bar 2, described extension bar 2 structures are as implementing as described in 1, no longer do detailed description herein, described long screw drill rod 5 is fixed on the auger stem assembling end of described extension bar 2, described long screw drill rod 5 axis axially and described extension bar 2 axial consistent, described in the present embodiment long screw drill rod 5 is connected by adapter flange 4 with the auger stem assembling end of extension bar 2, in other embodiments of the invention, described long screw drill rod 5 is held with the auger stem assembling of extension bar 2 also can be by being threaded, described unit head 3 tops vertically are provided with the support limit bar 1 that is used for Grouting Pipe 44 support limit under the rig duty, connect by linking arm 43 between described extension bar 2 and the support limit bar 1, one end of described linking arm 43 is arranged on the described swivel coupling 42, described linking arm away from an end slidable fit of extension bar 2 on described support limit bar 1, the inner peripheral surface of the pilot hole 21 of the moment of torsion output of described unit head 3 is provided with at least two power run-out keies towards the side extension of the pilot hole 21 hole hearts, in the present embodiment, the inner peripheral surface in assembling 21 holes of described moment of torsion output is evenly distributed with three power run-out keies 20 towards the side extension of the pilot hole hole heart, and described three power run-out keies 20 cooperate transfer torque with three keyways 48, is connected on described pilot hole 21 outer peripheral faces to be provided with to drive gear ring 22, described unit head also comprises first gear 23 and second gear 25 that is used to drive gear ring 22 engaged transmission, described driving gear ring 22, first gear 23 and second gear, 25 coplanars are horizontally disposed with, and the described driving gear ring 22 and first gear 23 are in a ratio of gear wheel, and the described driving gear ring 22 and second gear 25 are in a ratio of gear wheel, described first gear 23 and second gear 25 are in transmission connection with the clutch end of corresponding hydraulic motor 27 and the clutch end of hydraulic motor 26 respectively, unit head 3 also comprises braced structures 29, also is provided with motor-driven hydraulic pump 15 on the described rotary table 8, and the power intake of the clutch end of described hydraulic pump 15 and hydraulic motor 26 and the power intake of hydraulic motor 27 are in transmission connection, the power intake of the clutch end of the clutch end of hydraulic motor 26 and hydraulic motor 27 and unit head 3 is in transmission connection, part 7 is sliding supports among the figure, and part 10 is drill bits, and part 9 is guide-localization supports of drill bit, part 17 is counterweights, part 12, part 13 and part 14 are hoist engines of three kinds of specifications, and part 19 is the pulley yoke assembly, during work, power set of the present invention adopt planetary structure, different hydraulic motors drives first gear 23 and second gear, 25, the first gears 23 and second gear 25 respectively and drives 22 rotations of driving gear ring, the variable principle-low-speed big of utilization hydraulic motor, the little moment of torsion of high speed changes therebetween mutually, realize infinitely variable speeds, give full play to its usefulness, overcome the consistent problem that has high energy consumption of traditional long-spiral drilling machine, improved the efficient of complete machine greatly, unit head 3 of the present invention is to drive separately hydraulic pump respectively with 2 motors, and the hydraulic system that inserts in parallel drives unit head 3 then, so 2 motors can not start simultaneously, so just reduced the impact to electrical network, the voltage range broad is when rig creeps into, unit head 3 turns clockwise, moment of torsion output by unit head 3 cooperates transfer torque with the key of extension bar 2, after getting into certain depth, and unit head 3 counter-rotating certain angles, the primer fluid writing that surpasses all the others is raised and is promoted unit head 3 to last moment of torsion input section 30, long screw drill rod 5 continues to bore dark under the effect of gravity, after reaching the predetermined degree of depth, and beginning slip casting, the hydraulic pressure elevator promotes unit head 3, drive extension bar 2 and long screw drill rod 5 risings, after certain height, stop slip casting, utilize the support force of concrete to long screw drill rod 5, unit head 3 counter-rotating certain angles, at this moment the hydraulic pressure elevator is imported section 36 with the following moment of torsion that unit head 3 is placed into extension bar 2, unit head 3 counter-rotating certain angles, under the effect of gear block 35, the hydraulic pressure elevator continue to promote unit head 3, and unit head 3 drives extension bars 2 and long screw drill rod 5 and continues to promote until proposing boring to drill bit 10, and this rig has solved existing long-spiral drilling machine and bored the height that need increase boring tower when dark because increase, be stability that guarantees complete machine and then the diameter that needs to increase boring tower this moment, strengthen the intensity of platform, increase a series of measures such as counterweight, the problem that the cost of production that causes increases.
Claims (10)
1. extension bar, it is characterized in that: described extension bar vertically is provided with when being straight-bar and use, described extension bar axially has the through hole that is used for concrete perfusion along it, vertically offer at least one keyway on the side face of described extension bar, described keyway comprises left cell wall and the right cell wall that vertically is provided with at interval, described left cell wall two ends vertically are respectively arranged with last moment of torsion input section and the following moment of torsion input section that is used for the moment of torsion input, described extension bar is provided with in the following upper end of moment of torsion input section and is used to the lower gear structure that stops the power run-out key vertically to slide, be provided with between described gear structure and described right cell wall and be used for the gap that the power run-out key vertically passes, the lower end of described extension bar is provided with the auger stem assembling end that is used for the long screw drill rod assembling.
2. a kind of extension bar according to claim 1, it is characterized in that: the below of affiliated last moment of torsion input section is extended to be provided with towards right cell wall direction and is used to the last gear structure that stops the power run-out key vertically to slide, the described gear structure that goes up is for radially to extend the last gear block of setting along extension bar, described lower gear structure is for radially to extend the lower gear piece of setting along extension bar, and described upward gear block and lower gear interblock vertically are provided with and are used for the left feather key bar that the power run-out key vertically slides.
3. a kind of extension bar according to claim 1, it is characterized in that: described keyway circumferentially is evenly equipped with three along extension bar, described extension bar also comprises and is used for the right feather key bar that the power run-out key vertically slides, described right cell wall is the sidewall of right feather key bar, the described moment of torsion input section that goes up is provided with the last key bar that is used for power run-out key transfer torque, the described input of moment of torsion down section is provided with the following key bar that is used for power run-out key transfer torque.
4. a kind of extension bar according to claim 1 is characterized in that: the upper end of described extension bar is provided with the concrete input that is used for the concrete input, and described concrete input is provided with and is used for the swivel coupling that Grouting Pipe connects.
5. long-spiral drilling machine, comprise chassis assembly, described chassis assembly comprises walking mechanism and rotary table, described rotary table is provided with boring tower, the dynamic head of slidable fit vertically on the described boring tower, described unit head is provided with the pilot hole that is used for the extension bar inserting, the inner peripheral surface of described pilot hole is provided with at least two power run-out keies towards the side extension of the pilot hole hole heart, it is characterized in that: described extension bar vertically is provided with when being straight-bar and use, described lengthening axially has the through hole that is used for concrete perfusion along it, vertically offer at least one keyway on the side face of described extension bar, described keyway comprises left cell wall and the right cell wall that vertically is provided with at interval, described left cell wall two ends vertically are respectively arranged with last moment of torsion input section and the following moment of torsion input section that is used for the moment of torsion input, described extension bar is provided with in the following upper end of moment of torsion input section and is used to the lower gear structure that stops the power run-out key vertically to slide, be provided with between described gear structure and described right cell wall and be used for the gap that the power run-out key vertically passes, the lower end of described extension bar is provided with the auger stem assembling end that is used for the long screw drill rod assembling.
6. long-spiral drilling machine according to claim 5, it is characterized in that: described keyway circumferentially is evenly equipped with three along extension bar, under the below of last moment of torsion input section be provided with towards right cell wall direction extension and be used to the last gear structure that stops the power run-out key vertically to slide, the described gear structure that goes up is for radially to extend the last gear block of setting along extension bar, described lower gear structure is for radially to extend the lower gear piece of setting along extension bar, and described upward gear block and lower gear interblock vertically are provided with and are used for the feather key bar that the power run-out key vertically slides.
7. long-spiral drilling machine according to claim 5, it is characterized in that: described keyway circumferentially is evenly equipped with three along extension bar, described extension bar also comprises and is used for the right feather key bar that the power run-out key vertically slides, described right cell wall is the sidewall of right feather key bar, the described moment of torsion input section that goes up is provided with the last key bar that is used for power run-out key transfer torque, and the described section of moment of torsion input down is provided with the following key bar that is used for power run-out key transfer torque.
8. long-spiral drilling machine according to claim 5 is characterized in that: the upper end of described extension bar is provided with the concrete input that is used for the concrete input, and described concrete input is provided with and is used for the swivel coupling that Grouting Pipe connects.
9. long-spiral drilling machine according to claim 5, it is characterized in that: described unit head top vertically is provided with the support limit bar that is used for the Grouting Pipe support limit, connect by linking arm between described extension bar and the support limit bar, one end of described linking arm is arranged on the described swivel coupling, described linking arm away from an end slidable fit of extension bar on described support limit bar.
10. long-spiral drilling machine according to claim 5 is characterized in that: the auger stem assembling end of described extension bar is connected by the adapter flange transition with long screw drill rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100897719A CN102155169A (en) | 2011-04-11 | 2011-04-11 | Extension bar and long spiral drilling machine using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100897719A CN102155169A (en) | 2011-04-11 | 2011-04-11 | Extension bar and long spiral drilling machine using same |
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| CN102155169A true CN102155169A (en) | 2011-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011100897719A Pending CN102155169A (en) | 2011-04-11 | 2011-04-11 | Extension bar and long spiral drilling machine using same |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106150391A (en) * | 2016-08-23 | 2016-11-23 | 山河智能装备股份有限公司 | A kind of have the piling machinery that support function followed by drilling rod |
| CN108374411A (en) * | 2018-03-19 | 2018-08-07 | 杭州好桩机械科技有限公司 | The dismountable screw pile machine of ultra-deep pile foundation drilling rod and the construction method of ultra-deep stake |
| CN109025816A (en) * | 2018-07-16 | 2018-12-18 | 深圳市工勘岩土集团有限公司 | Ultra-deep super thick dense sand stratum pile for prestressed pipe long spire drawing hole construction method |
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| EP0548900A2 (en) * | 1991-12-24 | 1993-06-30 | SOILMEC S.p.A. | Hydraulic drilling machine of telescopic tower type with a rod stowing and handling system |
| CN201162489Y (en) * | 2008-01-31 | 2008-12-10 | 王凤良 | Full screw earth auger |
| CN101824960A (en) * | 2010-05-06 | 2010-09-08 | 侯庆国 | Full-hydraulic screw drilling machine |
| CN202108422U (en) * | 2011-04-11 | 2012-01-11 | 河南省三力机械制造有限公司 | Lengthening bar and long-spiral drilling machine using same |
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2011
- 2011-04-11 CN CN2011100897719A patent/CN102155169A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0548900A2 (en) * | 1991-12-24 | 1993-06-30 | SOILMEC S.p.A. | Hydraulic drilling machine of telescopic tower type with a rod stowing and handling system |
| CN201162489Y (en) * | 2008-01-31 | 2008-12-10 | 王凤良 | Full screw earth auger |
| CN101824960A (en) * | 2010-05-06 | 2010-09-08 | 侯庆国 | Full-hydraulic screw drilling machine |
| CN202108422U (en) * | 2011-04-11 | 2012-01-11 | 河南省三力机械制造有限公司 | Lengthening bar and long-spiral drilling machine using same |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106150391A (en) * | 2016-08-23 | 2016-11-23 | 山河智能装备股份有限公司 | A kind of have the piling machinery that support function followed by drilling rod |
| CN106150391B (en) * | 2016-08-23 | 2019-07-05 | 山河智能装备股份有限公司 | It is a kind of to follow the piling machinery for helping function with drilling rod |
| CN108374411A (en) * | 2018-03-19 | 2018-08-07 | 杭州好桩机械科技有限公司 | The dismountable screw pile machine of ultra-deep pile foundation drilling rod and the construction method of ultra-deep stake |
| CN109025816A (en) * | 2018-07-16 | 2018-12-18 | 深圳市工勘岩土集团有限公司 | Ultra-deep super thick dense sand stratum pile for prestressed pipe long spire drawing hole construction method |
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Owner name: CHINA RAILWAY SANLI HEAVY INDUSTRY CO., LTD. Free format text: FORMER OWNER: HENAN SANLI MECHANICAL MANUFACTURE CO., LTD. Effective date: 20130208 Free format text: FORMER OWNER: HE WEIBIN Effective date: 20130208 |
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Effective date of registration: 20130208 Address after: 450016 No. sixth, 99 Avenue, Zhengzhou Economic Development Zone, Henan, China Applicant after: HENAN SANLI MECHANICAL MANUFACTURE CO., LTD. Address before: 450100 No. 1 Tashan Road, Zhengzhou, Henan, Xingyang Applicant before: Henan Sanli Mechanical Manufacture Co., Ltd. Applicant before: He Weibin |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110817 |