CN207003502U - It is a kind of to be fetched earth deviation correcting device for basement - Google Patents

It is a kind of to be fetched earth deviation correcting device for basement Download PDF

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Publication number
CN207003502U
CN207003502U CN201720845668.5U CN201720845668U CN207003502U CN 207003502 U CN207003502 U CN 207003502U CN 201720845668 U CN201720845668 U CN 201720845668U CN 207003502 U CN207003502 U CN 207003502U
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CN
China
Prior art keywords
support frame
ratchet
underframe
basement
slot
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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 - Fee Related
Application number
CN201720845668.5U
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Chinese (zh)
Inventor
张润财
王擎忠
王立中
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hangzhou Shengji Construction Special Project Co Ltd
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Hangzhou Shengji Construction Special Project Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Priority to CN201720845668.5U priority Critical patent/CN207003502U/en
Application granted granted Critical
Publication of CN207003502U publication Critical patent/CN207003502U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

Fetched earth deviation correcting device for basement the utility model discloses a kind of, the one kind includes underframe for the basement deviation correcting device that fetches earth, the support frame being rotatablely connected with respect to underframe and the reduction box being arranged on support frame, auger stem is connected with the reduction box, the reduction box is slided up and down by lowering or hoisting gear drives edge support frame, some standing grooves are offered on the underframe, corresponded in the standing groove and be provided with roller, the roller is hidden in standing groove or is connected to ground by drive device driving and underframe is suspended on into ground, walked with promotion whole device is easy to, the advantages of reducing intensity of workers.

Description

It is a kind of to be fetched earth deviation correcting device for basement
Technical field
It the utility model is related to and a kind of fetched earth deviation correcting device for basement.
Background technology
Subgrade stress release method, also known as drill spoil disposal correcting method, refers to that inclined building settles less side drilling, presses Plan regularly mud in cleaning eye, cause foundation soil lateral stress to release, substrate mud is outwards extruded, so as to cause this Side setting of ground, it is finally reached the purpose of rectification.Subgrade stress release method is applied to be built in the larger weak soil of thickness(As become silted up Mud, muck soil, peat, cumulosol, rinse fill etc.)The rectification of building on ground.
Twist bit is that more universal pile foundation construction equipment can also be used for the rectification work that fetches earth, and it has simple to operate It is easy to use, drilling efficiency is high the advantages of, in general twist bit is made up of crane and drill bit, is formed large-scale spiral and is bored Machine, boring extracting soil is carried out to ground, reaches the purpose of building inclination rectification.
When to building basement layer carry out boring extracting soil when, due to height of house limit, such a large-scale spiral rig without Method is entered in building and constructed, therefore designs compact spiral rig as shown in Figure 6, can be entered in basement and be carried out Work, such a twist bit include the support frame 2 that underframe 1 and relative underframe 1 can rotate, set on support frame as described above 2 There is the reduction box 3 slided up and down along support frame 2, auger stem 4 is connected with the output shaft of reduction box 3, support frame 2 passes through hydraulic cylinder Support phase is rotated to underframe 1 and is limited in a certain angle, and the different hole in angle of inclination is drilled out to ground for controlling, is met Different construction requirements.
It is in place of the deficiencies in the prior art, such a twist bit itself does not possess locomotivity, it is necessary to which more people are to rig Lift fortune is carried out, operation is cumbersome and causes intensity of workers to increase.
Utility model content
The purpose of this utility model is to provide a kind of basement that is used for and fetched earth deviation correcting device, has and is easy to promotion whole device Walking, reduce intensity of workers the advantages of.
Above-mentioned technical purpose of the present utility model technical scheme is that:
One kind is used for basement and fetched earth deviation correcting device, including the support frame that is rotatablely connected of underframe, relative underframe and setting In being connected with auger stem on the reduction box on support frame, the reduction box, the reduction box passes through lowering or hoisting gear drives edge branch Support is slided up and down, and some standing grooves are offered on the underframe, is corresponded in the standing groove and is provided with roller, the rolling Wheel is hidden in by drive device driving in standing groove or be connected to ground is suspended on ground by underframe.
Using said structure, when needing transfer location to carry out boring extracting soil operation, roller is driven to revolve by drive device Produce and abutted outside standing groove with ground, underframe is suspended on ground, consequently facilitating pushing meanss are walked, avoid manpower from directly removing Fortune, reduce the labor intensity of staff;When needing to stop carrying out boring extracting soil operation in situ, it will be rolled by drive device Wheel is hidden in standing groove, and underframe lower end abuts with ground, its whole device is smoothly positioned on ground, so that can Stable carries out boring extracting soil operation to ground.
More preferably:The drive device includes the rotary shaft being fixed in standing groove, is fixed in the rotary shaft There is ratchet, the roller relatively rotates axle by connecting rod one and is rotatablely connected, is provided with one end of the counter roller of connecting rod one Drive shaft, is rotatably connected to the ratchet engaged with ratchet in the drive shaft, and the ratchet is caught in or taken off by the way that locating part is spacing From the state of ratchet, when ratchet is caught in ratchet, limitation roller routs up downwards the unidirectional upset of standing groove, in the standing groove The limited block that limitation roller is overturn toward other direction is additionally provided with, the roller is vertically connected to ground and underframe is suspended on into ground When, upper surface abuts with limited block.
Using said structure, drive roller to be overturn by the center of circle of rotary shaft by drive shaft, support its roller one end Be connected to limited block limited roller continue upset when, roller is connected to ground and underframe is suspended on ground, and then passes through locating part Ratchet is limited to engage to the state of ratchet, it is limited the bidirectional turning of roller, so that it easily pushing meanss can walk; Drive roller to carry out circular motion upset by the center of circle of rotary shaft by drive shaft simultaneously, its drive shaft is formed lever, so as to Reach more laborsaving, operate more easily effect.
More preferably:Connected between drive shaft described in homonymy by a connecting rod two.
Using said structure, by being connected between homonymy drive shaft by connecting rod two, it is set to directly drive connecting rod two During motion, it can synchronously drive the drive shaft of homonymy two to drive roller upset, reach effect easy to operation.
More preferably:Both sides connecting rod two is connected with respect between one end of auger stem by connecting rod three, described The handle for being easy to drive link three to move is provided with connecting rod three.
Using said structure, both sides connecting rod two is connected by connecting rod three, when making the motion of its drive link three, even Under the active force of bar two, it can synchronously drive all rollers to overturn, reach effect easy to operation;And then by being set on connecting rod three The handle put, it is easy to staff's drive link three to move.
More preferably:The locating part include grafting block, the slot one opened up on drive shaft end face, slot two with And the slot three that ratchet relative drive shaft rotation process connects with slot one, slot two respectively, the grafting block insertion slot one, When in slot three, limitation ratchet is caught in ratchet;When in grafting block insertion slot two, slot three, ratchet releases the limit to ratchet Position effect.
Using said structure, when needing the limited roller unidirectionally to overturn, by by grafting block insert slot one with slot three, will Ratchet is limited in the state for being caught in ratchet, so as to limit the unidirectional upset of roller;Put when that roller need to be tilted out or is hidden in When putting in groove, by the way that grafting block is inserted in slot two and slot three, ratchet is limited in the state for departing from ratchet, so that its Roller may be reversed.
More preferably:The lowering or hoisting gear includes setting respectively along support frame length direction both sides and turned with support frame The drive roll and driven voller of connection are moved, sprocket wheel is respectively fixed with the drive roll and driven voller, passes through a chain between two sprocket wheels Bar is connected, and the chain is fixed with reduction box, is provided with support frame as described above and is only capable of for reduction box along support frame length side To the slideway of slip, the positive and negative motor of driving drive roll rotation is provided with support frame as described above.
Using said structure, it is necessary to when carrying out boring extracting soil operation to ground, pass through positive and negative motor driven driving wheel and chain Positive and negative rotation is taken turns, under the gear engaging force of chain and sprocket wheel, driving reduction box slides up and down along support frame length direction, Reduction box drives auger stem to rotate simultaneously, and boring extracting soil work is carried out to ground.
More preferably:The side of the underframe towards auger stem drill bit is provided with support base one, the support base It is provided with mounting seat one on one, is correspondingly arranged on mounting seat two with mounting seat one on support frame as described above, is passed through by a jointed shaft Mounting seat one and mounting seat two, realize the rotation connection between support frame and underframe, are additionally provided with the underframe for driving Support frame is with respect to the actuator that underframe is overturn.
Using said structure, jacking driving is carried out to support frame by actuator, makes its support frame using jointed shaft as the center of circle Circular motion is carried out, so as to adjust the gradient that auger stem is drilled to ground, adapts to more different construction requirements.
More preferably:The support base for supporting support frame is provided with the side of the underframe relative support seat one Two, rubber sleeve is arranged on the upper surface of support base two.
Using said structure, when boring work need not be carried out, support frame is overturn to lower parallel with underframe, reduction entirety The height of device, it is easy to transport device to elsewhere, and then support frame is supported by support base two, makes its support When under frame upset, one side actuator is not required to continue to support force to support frame, so as to extend the service life of actuator, separately On the one hand more stable support can be carried out to support frame;And then by the rubber sleeve on support base two, support can be reduced Mutual abrasion between frame and support base two.
More preferably:Support frame as described above is towards being provided with what is passed through for auger stem on one end of auger stem drill bit Sheath.
,, can be to local products because auger stem is constantly in high-speed rotation during auger stem boring extracting soil using said structure Raw operating on centrifugal force, soil is got rid of to surrounding, spacing to the soil progress thrown away by sheath, is got rid of its taking-up soil and is fallen within certain model In enclosing, mitigate cleaning task afterwards.
In summary, the utility model has the advantages that:
1st, underframe outside standing groove may be reversed by roller and is suspended on ground and click and limited block limitation roller Continue inverting action power, make it easy to promote single unit system walking, reach the effect for reducing intensity of workers;
2nd, homonymy drive shaft is connected by connecting rod two and connecting rod three connects both sides connecting rod two, driving connects When bar three moves, all rollers can be driven to overturn under the interlink function power of connecting rod two, reach effect easy to operation.
Brief description of the drawings
Fig. 1 is the structural representation of embodiment one, shows overall structure;
Fig. 2 is the structural representation of embodiment one, shows the attachment structure between support frame and underframe;
Fig. 3 is the partial structural diagram of embodiment two, shows the attachment structure between all rollers;
Fig. 4 is the partial structural diagram of embodiment two, shows the attachment structure between roller and drive device;
Fig. 5 is the enlarged diagram at A in Fig. 4, shows the attachment structure of locating part;
Fig. 6 is the structural representation of prior art, shows overall structure.
In figure, 1, underframe;2nd, support frame;3rd, reduction box;4th, auger stem;5th, lowering or hoisting gear;51st, drive roll;52nd, it is driven Roller;53rd, sprocket wheel;54th, chain;55th, positive and negative motor;6th, standing groove;7th, roller;8th, drive device;81st, rotary shaft;82nd, ratchet; 83rd, ratchet;84th, drive shaft;85th, limited block;86th, connecting rod one;9th, locating part;91st, grafting block;92nd, slot one;93rd, slot two; 94th, slot three;10th, connecting rod two;11st, connecting rod three;12nd, handle;13rd, slide;14th, slideway;15th, actuator;16th, mounting seat one; 17th, mounting seat two;18th, jointed shaft;19th, sheath;20th, rubber sleeve;21st, support base one;22nd, support base two.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
Embodiment 1:It is a kind of to be fetched earth deviation correcting device for basement, as illustrated in fig. 1 and 2, including underframe 1, support frame 2 and The reduction box 3 slided up and down along support frame 2, auger stem 4, support frame as described above 2 and underframe are connected with the output shaft of reduction box 3 1 rotation connection, reduction box 3 are slided up and down by the drives edge support frame 2 of lowering or hoisting gear 5, and boring extracting soil is carried out to ground.
Both sides are respectively fixed with support base 1 and support base 2 22 along its length on underframe 1, two on support base 1 Side is respectively fixed with mounting seat 1, is correspondingly arranged on mounting seat 2 17 with mounting seat on support frame 2, is worn by a jointed shaft 18 Mounting seat 1 and mounting seat 2 17 are crossed, and then drives support frame 2 to be overturn with respect to underframe 1 by an actuator 15.
Wherein, actuator 15 is arranged to hydraulic cylinder, and hydraulic cylinder one end is rotatablely connected with underframe 1,2 turns of the other end and support frame Dynamic connection, rotated by the telescopic drive support frame 2 of hydraulic cylinder output shaft with respect to underframe 1.
When support frame 2 is parallel with underframe 1, the upper end of support base 2 22 is connected to support frame 2 and support frame 2 is propped up Support;Wherein, rubber sleeve 20 is fixed in the upper end of support base 2 22.
Above-mentioned lowering or hoisting gear 5 includes being arranged at support frame 2 both sides and passes through bearing along its length(Not shown in figure) The drive roll 51 and driven voller 52 that relative support frame 2 is rotatablely connected, sprocket wheel 53 is respectively fixed with drive roll 51 and driven voller 52, Coiling has a chain 54 on two sprocket wheels 53;Reduction box 3 is provided with slide 13 along its width both sides, and the both sides of support frame 2 are set Be equipped with the slideway 14 slided for slide 13, reduction box 3 fixes with chain 54, so as in positive and negative motor 55 driving drive roll 51 and Under the positive and negative rotation active force of sprocket wheel 53, reduction box 3 is driven to be slided up and down along support frame 2 and the band of reduction box 3 by chain 54 Under the rotary action power of dynamic auger stem 4, boring extracting soil is carried out to ground.
Wherein, the fixed plate one and fixed plate two that slide 13 is fixed by reduction box 3 form, and fixed plate one passes through fastening bolt Fixed with fixed plate two and form U-shaped with fixed plate two, be sticked on slideway 14.
Support frame 2 is towards being provided with the sheath 19 that is passed through for auger stem 4 on one end of the drill bit of auger stem 4.
The operation principle of embodiment 1:When needing to carry out boring extracting soil operation, by hydraulic cylinder extension by support frame 2 to cut with scissors Spindle 18 overturns for the center of circle, after turning to required angle, drives drive roll 51 to rotate forward by positive and negative motor 55, so as to pass through chain The drive chains 54 of wheel 53 rotate, and under the fixation power of chain 54 and reduction box 3, driving reduction box 3 is along support frame 2 towards cunning It is dynamic, while reduction box 3 drives auger stem 4 to rotate, and boring work is carried out to ground;Needed for getting into during height, positive and negative motor 55 Drive drive roll 51 to overturn, drive reduction box 3 to be slided upward along support frame 2 by chain 54, drilling rod is detached into drilling, so as to Complete boring procedure.
Embodiment 2:As shown in figs. 1 and 3, the difference with embodiment 1 is, above-mentioned 1 four corners of underframe are opened respectively Provided with standing groove 6, be respectively arranged with roller 7 in standing groove 6, roller 7 be hidden in by a drive device 8 driving in standing groove 6 or It is that prominent standing groove 6 is outer to abut with ground and underframe 1 is suspended on into ground.
Reference picture 3 and 4, above-mentioned drive device 8 include the rotary shaft 81 being fixed in standing groove 6, fixed in rotary shaft 81 There is ratchet 82, the upper end of roller 7 is fixed with connecting rod 1 and relatively rotates axle 81 by connecting rod 1 and is rotatablely connected, connecting rod 1 Drive shaft 84 is provided with one end of counter roller 7, the ratchet engaged with ratchet 82 is rotatably connected on one end of drive shaft 84 83, ratchet 83 passes through the spacing state for being caught in or departing from ratchet 82 of locating part 9, when ratchet 83 is caught in ratchet 82, limitation rolling Wheel 7 routs up downwards the unidirectional upset of standing groove 6, is further fixed on limiting the limited block that roller 7 is overturn towards other direction in standing groove 6 85, when needing the pushing meanss to walk, by the way that roller 7 is tilted out into standing groove 6, upper end abuts with limited block 85, and ratchet 83 is caught in spine In wheel 82, limitation roller 7 continues to overturn, and makes it easy to pushing meanss walking.
With reference to Figure 4 and 5, wherein, locating part 9 includes grafting block 91, the slot 1, the slot that open up on the one end of drive shaft 84 2 93 and ratchet 83 on the slot 3 94 that opens up, when grafting block 91 is inserted into slot 1 with slot 3 94, at ratchet 83 In the state being caught in ratchet 82;When grafting block 91 inserts slot 2 93 with slot 3 94, ratchet 83, which is in, to be departed to spine The state of the limitation of wheel 82, roller 7 may be reversed in standing groove 6.
Reference picture 3 and 4, wherein, connected between the drive shaft 84 of homonymy two by connecting rod 2 10, the both ends of connecting rod 2 10 point It is not rotatablely connected with both sides drive shaft 84.
Reference picture 3 and 4, wherein, connected on one end of the relative support seat 1 of both sides connecting rod 2 10 by connecting rod 3 11 Come, the both sides of connecting rod 3 11 are rotatablely connected with both sides connecting rod 2 10 respectively, are further fixed on being easy to drive link 3 11 on connecting rod 3 11 The handle 12 of motion.
The operation principle of embodiment 2:When needing to carry spiral soil borrowing device, it is right that grafting block 91 is first extracted into releasing ratchet 83 The position-limiting action of ratchet 82, and then overturn by the drivening rod 3 11 of handle 12, under the interlink function power of connecting rod 2 10, drive Drive shaft 84 is that circular motion is done in the center of circle with rotary shaft 81, and roller 7 is tilted out outside standing groove 6 and is connected to ground by underframe 1 Ground is suspended on, until the upper end of roller 7 abuts with limited block 85, then ratchet 83 is caught in ratchet 82, grafting block 91 is inserted Enter slot 1 and in slot 3 94, limitation roller 7 continues to overturn, so as to which light pushing meanss are walked;
When needing to carry out boring extracting soil work, first grafting block 91 is extracted, ratchet 83 is dug into releasing to ratchet 82 Position-limiting action, and then overturn by the drivening rod 3 11 of handle 12, under the active force of connecting rod 2 10, drive all rollers 7 slow It is slow to be inverted into standing groove 6, after direct underframe 1 abuts with ground completely, clamping jaw is caught in ratchet 82, inserted by grafting block 91 Enter slot 1 and in slot 3 94, limitation roller 7 downwardly turns over, make its device is stable to be positioned on ground, after being easy to Continuous boring extracting soil operation.
This specific embodiment is only that it is not to limitation of the present utility model, ability to explanation of the present utility model Field technique personnel can make the modification of no creative contribution to the present embodiment as needed after this specification is read, but As long as all protected in the scope of protection of the utility model by Patent Law.

Claims (9)

  1. Fetched earth deviation correcting device 1. one kind is used for basement, including the support frame (2) that is rotatablely connected of underframe (1), relative underframe (1) with And the reduction box (3) on support frame (2) is arranged at, auger stem (4), the reduction box (3) are connected with the reduction box (3) Slided up and down by lowering or hoisting gear (5) drives edge support frame (2), it is characterized in that:Some standing grooves are offered on the underframe (1) (6), corresponded in the standing groove (6) and be provided with roller (7), the roller (7) is hidden in by a drive device (8) driving In standing groove (6) or be connected to ground is suspended on ground by underframe (1).
  2. 2. it is according to claim 1 it is a kind of fetched earth deviation correcting device for basement, it is characterized in that:The drive device (8) Including the rotary shaft (81) being fixed in standing groove (6), ratchet (82), the roller (7) are fixed with the rotary shaft (81) Axle (81) is relatively rotated by connecting rod one (86) to be rotatablely connected, and is provided with one end of described (86) counter roller (7) of connecting rod one Drive shaft (84), the ratchet (83) engaged with ratchet (82) is rotatably connected on the drive shaft (84), and the ratchet (83) is logical Cross the spacing state for being caught in or departing from ratchet (82) of locating part (9), when ratchet (83) be caught in ratchet (82) it is interior when, limit roller (7) the unidirectional upset of standing groove (6) is routed up downwards, and limitation roller (7) is additionally provided with the standing groove (6) and is turned over toward other direction The limited block (85) turned, when the roller (7) is vertically connected to ground underframe (1) is suspended on into ground, upper surface and limited block (85) abut.
  3. 3. it is according to claim 2 it is a kind of fetched earth deviation correcting device for basement, it is characterized in that:Drive shaft described in homonymy (84) connected between by a connecting rod two (10).
  4. 4. it is according to claim 3 it is a kind of fetched earth deviation correcting device for basement, it is characterized in that:Both sides connecting rod two (10) phase To being connected between one end of auger stem (4) by connecting rod three (11), it is provided with the connecting rod three (11) and is easy to drive The handle (12) of connecting rod three (11) motion.
  5. 5. it is according to claim 2 it is a kind of fetched earth deviation correcting device for basement, it is characterized in that:Locating part (9) bag Include grafting block (91), the slot one (92), slot two (93) and the ratchet (83) that open up on drive shaft (84) end face are relative drives The slot three (94) that moving axis (84) rotation process connects with slot one (92), slot two (93) respectively, the grafting block (91) are inserted Enter slot one (92), slot three (94) it is interior when, limitation ratchet (83) be caught in ratchet (82);Grafting block (91) inserts slot two (93) when, slot three (94) is interior, ratchet (83) releases the position-limiting action to ratchet (82).
  6. 6. it is according to claim 1 it is a kind of fetched earth deviation correcting device for basement, it is characterized in that:The lowering or hoisting gear (5) Including the drive roll (51) and driven voller for setting along support frame (2) length direction both sides and being rotatablely connected with support frame (2) respectively (52) sprocket wheel (53), is respectively fixed with the drive roll (51) and driven voller (52), two sprocket wheels pass through a chain between (53) (54) connect, the chain (54) is fixed with reduction box (3), is provided with support frame as described above (2) and is only capable of for reduction box (3) Along the slideway (14) of support frame (2) length direction slip, a driving drive roll (51) rotation is provided with support frame as described above (2) Positive and negative motor (55).
  7. 7. it is according to claim 1 it is a kind of fetched earth deviation correcting device for basement, it is characterized in that:Underframe (1) direction The side of auger stem (4) drill bit is provided with support base one (21), and mounting seat one (16) is provided with the support base one (21), Mounting seat two (17) is correspondingly arranged on mounting seat one (16) on support frame as described above (2), installation is passed through by a jointed shaft (18) One (16) of seat and mounting seat two (17), realize the rotation connection between support frame (2) and underframe (1), are also set on the underframe (1) It is equipped with for driving support frame (2) with respect to the actuator (15) of underframe (1) upset.
  8. 8. it is according to claim 7 it is a kind of fetched earth deviation correcting device for basement, it is characterized in that:The underframe (1) is relative It is provided with the side of support base one (21) for supporting the support base two (22) of support frame (2), on the support base two (22) Rubber sleeve (20) is arranged on end face.
  9. 9. it is according to claim 1 it is a kind of fetched earth deviation correcting device for basement, it is characterized in that:Support frame as described above (2) court The sheath (19) passed through for auger stem (4) is provided with to one end of auger stem (4) drill bit.
CN201720845668.5U 2017-07-13 2017-07-13 It is a kind of to be fetched earth deviation correcting device for basement Expired - Fee Related CN207003502U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720845668.5U CN207003502U (en) 2017-07-13 2017-07-13 It is a kind of to be fetched earth deviation correcting device for basement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720845668.5U CN207003502U (en) 2017-07-13 2017-07-13 It is a kind of to be fetched earth deviation correcting device for basement

Publications (1)

Publication Number Publication Date
CN207003502U true CN207003502U (en) 2018-02-13

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109629848A (en) * 2019-01-10 2019-04-16 江苏工程职业技术学院 A kind of quantitative deviation correcting device of building
CN111322005A (en) * 2020-04-15 2020-06-23 上海艺盛实业有限公司 Rock drill

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109629848A (en) * 2019-01-10 2019-04-16 江苏工程职业技术学院 A kind of quantitative deviation correcting device of building
CN109629848B (en) * 2019-01-10 2020-11-24 江苏工程职业技术学院 Quantitative deviation correcting device of building
CN111322005A (en) * 2020-04-15 2020-06-23 上海艺盛实业有限公司 Rock drill

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Granted publication date: 20180213

Termination date: 20190713