CN108072313A - Prefabricated part grouting sleeve and joint bar position acceptance device and acceptance method - Google Patents
Prefabricated part grouting sleeve and joint bar position acceptance device and acceptance method Download PDFInfo
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- CN108072313A CN108072313A CN201710352644.0A CN201710352644A CN108072313A CN 108072313 A CN108072313 A CN 108072313A CN 201710352644 A CN201710352644 A CN 201710352644A CN 108072313 A CN108072313 A CN 108072313A
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- scale
- vernier
- joint bar
- main scale
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000011440 grout Substances 0.000 claims description 35
- 238000005259 measurement Methods 0.000 claims description 25
- 238000007689 inspection Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 210000003205 muscle Anatomy 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B5/25—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
- G01B5/252—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes for measuring eccentricity, i.e. lateral shift between two parallel axes
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length-Measuring Instruments Using Mechanical Means (AREA)
Abstract
The invention provides a prefabricated part grouting sleeve and joint bar position acceptance device and an acceptance method. The clamping operation of the to-be-measured joint bar and the clamping operation of the to-be-measured sleeve are simple and fast in the measuring process, meanwhile, the main scale marks, the vernier scale marks and the joint bar central line are aligned automatically when the main scale notches and the vernier scale notches can guarantee the clamping operation, and the main scale marks, the vernier scale marks and the sleeve central line are aligned automatically when the main scale plugs and the vernier scale plugs can guarantee the clamping operation, so that the measuring accuracy is improved.
Description
Technical field
The present invention relates to construction engineering technical fields, and in particular to a kind of prefabricated components grout sleeve and joint bar position are checked and accepted
Device and acceptance method.
Background technology
Grout sleeve connection is that common connection mode, each prefabricated components are set between prefabricated components in industrialized building
Put multiple joint bars and sleeve, it is pre- that multiple joint bars of upper floor prefabricated components need to be properly inserted lower floor by whens construction and installation
In the correspondence sleeve of component processed, if joint bar and sleeve portion deviation are excessive, will cause prefabricated components can not normal mounting, influence
Project progress and construction quality." 13 " state key research and development plan problem " industrialized building inspection of quality method and standard
The correlative study that system " (2016YFC0701805) carries out prefabricated components grout sleeve and joint bar position is checked and accepted is checked with improving
The precision and work efficiency of measurement.Therefore, it is necessary to carry out an acceptance inspection to prefabricated components grout sleeve and joint bar position.In practical operation
The joint bar and sleeve of one group of correspondence installation into row position checks and accepts when, the first centre-to-centre spacing of measurement two of which joint bar, then measure correspondence
The centre-to-centre spacing of two sleeves, then compare joint bar centre-to-centre spacing and bushing core away from deviation, will by deviation and inspection of quality specification
It asks and is compared, so as to judge whether prefabricated components grout sleeve and joint bar position are up to standard.At present, in engineering joint bar centre-to-centre spacing with
Bushing core is away from tape measure is used, and tape measure precision is relatively low, error range 2mm or so, in addition, it is necessary to naked eyes estimation set
The center of cylinder and joint bar, measurement accuracy is relatively low, and error amount is larger, and work efficiency is relatively low.
The content of the invention
The technical problems to be solved by the invention are to provide the prefabricated structure that a kind of examination is quick and examination precision is higher
Device is checked and accepted in part grout sleeve and joint bar position.
To achieve the above object, the technical solution taken of the present invention is：A kind of prefabricated components grout sleeve and joint bar position
Check and accept device, including main scale and vernier scale, the main scale include main scale ruler body, for joint bar is carried out locking main scale recess with
And the main scale plug for being caught in sleeve inner, the main scale ruler body are equipped with main scale scale, the center line of the main scale recess, institute
State that the center line of main scale plug is conllinear with the start index of the main scale scale, and the vernier scale is set on the main scale ruler body,
The vernier scale includes vernier scale ruler body, for the locking vernier scale recess of joint bar progress and for being caught in sleeve inner
Vernier scale plug, the vernier scale ruler body are equipped with vernier scale scale, the center line of the vernier scale recess, the vernier scale plug
Center line is conllinear with the start index of the vernier scale scale.
The main scale recess, the main scale plug, the vernier scale recess and the vernier scale plug are sheet body structure.
The main scale recess and the vernier scale recess are sheet body structure, and the main scale plug and the vernier scale plug are
Cone structure.
The main scale recess and the vernier scale recess are wedge shape, and the main scale plug and the vernier scale plug are circular cone
Body.
The apex angle of the wedge shape is 30~60 °, upper opening 50mm, and 30~60 ° of the apex angle of the cone, bottom are straight
Footpath is 50mm.
The vernier scale is equipped with trip bolt, and the vernier scale is fixed on the main scale by the trip bolt.
The trip bolt is located on the vernier scale ruler body.
The technical problems to be solved by the invention also reside in provide and a kind of check and accept quick and check and accept higher prefabricated of precision
Component grout sleeve and joint bar position acceptance method.
To achieve the above object, the technical solution taken of the present invention is：
A kind of prefabricated components grout sleeve and joint bar position acceptance method, comprise the following steps:
S1, determine that applying man-hour requirement corresponds to one group of joint bar of installation and the position of sleeve, cleans out joint bar and sleeve table
Face；
S2, selection need measuring center away from two joint bars, use the prefabricated components grout sleeve and joint bar of said structure
Position check and accept device, the main scale is vertical with the holding of joint bar axis, adjust the vernier scale position, make the main scale recess with
The vernier scale recess blocks two joint bars respectively, applies appropriate pressure, and recess inner edge is made to be held out against with joint bar surface, realizes main scale
The automatic alignment of scale, vernier scale scale and joint bar center line carries out reading, according to reading to the main scale and the vernier scale
Outcome measurement simultaneously records joint bar centre-to-centre spacing；
S3, other joint bar centre-to-centre spacing are measured one by one using with step S2 same procedures；
S4, selection need measuring center away from two sleeves, use the prefabricated components grout sleeve and joint bar of said structure
Device is checked and accepted in position, and the main scale is vertical with sleeve axis holding, adjusts the vernier scale position, makes the main scale plug and institute
It states vernier scale plug and is inserted into two sleeve inners respectively, apply appropriate pressure, making ruler, edge is bonded closely with socket port beyond the Great Wall, is realized
The automatic alignment of main scale scale, vernier scale scale and sleeve centerline carries out reading to the main scale and the vernier scale, according to
Reading outcome measurement and record bushing core away from；
S5, using with step S4 same procedures measure one by one other bushing cores away from；
S6, according to measurement result, calculate correspondence position joint bar centre-to-centre spacing and bushing core away from deviation, with inspection of quality
Code requirement is compared, and completes the examination to prefabricated components grout sleeve and joint bar position.
Number reading method is described in S2 and S4：The start index of the vernier scale scale corresponding main scale scale during reading
Numerical value is main scale numerical value, is closest to the numerical value of the graduation mark to align with the main scale scale in the vernier scale scale
Vernier scale numerical value, by the main scale numerical value and the vernier scale numerical value be added as joint bar centre-to-centre spacing and bushing core away from measurement
As a result.
Device and acceptance method are checked and accepted in the prefabricated components grout sleeve of the present invention and joint bar position, set main scale and vernier
Ruler, vernier scale can move about on main scale, and main scale scale is set on main scale, and vernier scale scale, main scale setting pair are set on vernier scale
Joint bar carries out locking main scale recess and is caught in the main scale plug of sleeve, and vernier scale, which is set, carries out joint bar locking vernier scale recess
With the vernier scale plug for being caught in sleeve, vernier scale into row position is adjusted, makes main scale recess and vernier scale recess difference locking to be measured
Joint bar, according in the numerical value of the corresponding main scale scale of vernier scale start index and vernier scale scale with it is closest in main scale scale
The numerical computations of the graduation mark of alignment go out the centre-to-centre spacing of joint bar to be measured, then enter sleeve to be measured by main scale plug and vernier scale fork clip,
The centre-to-centre spacing of sleeve to be measured is measured using same procedure, calculate the joint bar centre-to-centre spacing of correspondence position and bushing core away from
Deviation is compared with inspection of quality code requirement, you can completes the examination to prefabricated components grout sleeve and joint bar position, surveys
It is simple and quick to the locking of joint bar to be measured and to being caught in for sleeve to be measured during amount, meanwhile, main scale recess and vernier
Main scale scale, the automatic alignment of vernier scale scale and joint bar center line, main scale plug and vernier scale plug when ruler recess can ensure locking
The automatic alignment of main scale scale, vernier scale scale and sleeve centerline when can ensure to be caught in, so as to improve the accuracy of measurement.
Description of the drawings
Fig. 1 is the internal structure schematic diagram of specific embodiments of the present invention one；
Fig. 2 is the reading schematic diagram of the main scale scale 111 and vernier scale 211 in Fig. 1；
Fig. 3 is the joint bar center distance measurement schematic diagram of specific embodiments of the present invention one；
Fig. 4 is the bushing core of specific embodiments of the present invention one away from instrumentation plan.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
The specific embodiment one of device is checked and accepted in the prefabricated components grout sleeve of the present invention and joint bar position, as shown in Figure 1 to Figure 4 institute
Show, including main scale 1 and vernier scale 2, main scale 1 include main scale ruler body 11, for joint bar is carried out locking main scale recess 12 and
For being caught in the main scale plug 13 of sleeve inner, main scale ruler body 11 is equipped with main scale scale 111, and 111 range of main scale scale about 800~
1000mm (not completely shown in figure), measurement accuracy 1mm, the center line of main scale recess 12, the center line of main scale plug 13 and master
The start index of ruler scale 111 is conllinear, and vernier scale 2 is set on main scale ruler body 11, and vernier scale 2 includes vernier scale ruler body 21, uses
In on the vernier scale plug 23 to the locking vernier scale recess 22 of joint bar progress and for being caught in sleeve inner, vernier scale ruler body 21
Equipped with vernier scale scale 211,211 range of vernier scale scale is 1mm, measurement accuracy 0.02mm, the center of vernier scale recess 22
Line, the center line of vernier scale plug 23 are conllinear with the start index of vernier scale scale 211.
The connection of grout sleeve prefabricated components is usually on one group of joint bar 5 and lower prefabricated components 6 on upper prefabricated components 4
One group of 7 position of sleeve be performed in accordance with grout sleeve connection, when carrying out an acceptance inspection, first to need measuring center away from position correspond to
The outer surface of two joint bars 5 and the internal face of two sleeves 7 cleared up, after cleaning first to the centre-to-centre spacing of two joint bars 5 into
Row measurement, during measurement, first makes main scale 1 vertical with the holding of 5 axis of joint bar, then adjusts the position of vernier scale 2 and make 12 He of main scale recess
Vernier scale recess 22 is locking by joint bar 5 respectively, applies appropriate pressure, and recess inner edge is made to be held out against with joint bar surface, realizes that main scale is carved
The automatic alignment of degree, vernier scale scale and joint bar center line, at this point, the number of the corresponding main scale scale 111 of 2 start index of vernier scale
Value is main scale numerical value, in vernier scale scale 211 in main scale scale 111 closest to the numerical value i.e. vernier footage of the graduation mark to align
Main scale numerical value and vernier scale numerical value are added as the centre-to-centre spacing of joint bar 5 to be measured by value, such as shown in Fig. 2, vernier scale 2 originates
Numerical value, that is, main scale numerical value of the corresponding main scale scale 111 of scale is 418mm, in vernier scale scale 211 in main scale scale 111 most
Close to numerical value, that is, vernier scale numerical value of the graduation mark of alignment, in vernier scale scale 211 the 23rd article of graduation mark with main scale scale 111 most
Close to alignment, therefore, vernier scale numerical value is 23*0.02=0.46mm, by main scale numerical value 418mm and vernier scale numerical value 0.46mm phases
Add the centre-to-centre spacing 418.46mm as joint bar 5 to be measured, then the centre-to-centre spacing of two sleeves 7 is measured, during measurement, first make main scale
1 is vertical with the holding of 7 axis of sleeve, then adjusting the position of vernier scale 2 makes main scale plug 13 and vernier scale plug 23 be respectively clamped into sleeve 7,
Apply appropriate pressure, making ruler, edge is bonded closely with socket port beyond the Great Wall, realizes main scale scale, vernier scale scale and sleeve centerline
Automatic alignment, at this point, numerical value, that is, main scale numerical value of the corresponding main scale scale 111 of 2 start index of vernier scale, vernier scale scale
In 211 in main scale scale 111 closest to the numerical value i.e. vernier scale numerical value of graduation mark to align, by main scale numerical value and vernier footage
Value is added as the centre-to-centre spacing of sleeve 7 to be measured, using same procedure to the centre-to-centre spacing of other joint bars 5 and the centre-to-centre spacing of sleeve 7 into
Row measurement, according to measurement result, calculates the deviation of the centre-to-centre spacing of the joint bar 5 of correspondence position and the centre-to-centre spacing of sleeve 7, is tested with quality
It receives code requirement to be compared, completes the examination to prefabricated components grout sleeve and joint bar position.
Preferably, main scale recess 12, main scale plug 13, vernier scale recess 22 and vernier scale plug 23 are sheet body structure, are used
Sheet body structure, examination device entirety occupied space is smaller, is convenient for carrying.
Preferably, main scale recess 12 and vernier scale recess 22 are sheet body structure, reduce the occupied space for checking and accepting device,
Main scale plug 13 and vernier scale plug 23 are cone structure, clamping level higher when main scale plug 13 and vernier scale plug 23 are caught in sleeve,
And then reduce measurement error.
Preferably, main scale recess 12 and vernier scale recess 22 are wedge shape, are more conducive to carry out joint bar using wedge structure
Locking, main scale plug 13 and vernier scale plug 23 are cone, on the one hand easy to process, on the other hand, main scale plug 13 and vernier scale
Clamping level higher when plug 23 is caught in sleeve, can reduce measurement error.
Preferably, wedge-shaped apex angle be 30~60 °, upper opening 50mm, so as to the joint bar of below internal diameter 40mm
Centre-to-centre spacing is measured, 30~60 ° of apex angle, the base diameter 50mm of cone, so as to the sleeve to below internal diameter 40mm
Centre-to-centre spacing is measured.
Preferably, vernier scale 2 is equipped with trip bolt 3, and vernier scale 2 is fixed on main scale 1, can avoid by trip bolt 3
When being measured to the centre-to-centre spacing of joint bar 5 or sleeve 7 measurement error is caused to obtain due to the slip of vernier scale 2.
Preferably, trip bolt 3 is located on vernier scale ruler body 21, is convenient for installing.
The prefabricated components grout sleeve of the present invention and the specific embodiment one of joint bar position acceptance method, including following step
Suddenly:
S1, determine that applying man-hour requirement corresponds to one group of joint bar 5 of installation and the position of sleeve 7, cleans out joint bar and sleeve
Surface；
S2, selection need two joint bars of measurement distance, using the prefabricated components grout sleeve in above-described embodiment and insert
Device is checked and accepted in muscle position, and main scale 1 is vertical with the holding of 5 axis of joint bar, and 2 position of adjustment vernier scale makes main scale recess 12 and vernier
Ruler recess 22 blocks two joint bars 5 respectively, applies appropriate pressure, and recess inner edge is made to be held out against with joint bar surface, realization main scale scale,
The automatic alignment of vernier scale scale and joint bar center line carries out reading, according to reading result to the main scale and the vernier scale
It measures and records the centre-to-centre spacing of joint bar 5；
S3, using the centre-to-centre spacing for measuring other joint bars 5 one by one with step S2 same procedures；
S4, selection need two sleeves 7 of measurement distance, using the prefabricated components grout sleeve in above-described embodiment and insert
Device is checked and accepted in muscle position, and main scale 1 is vertical with the holding of 7 axis of sleeve, and adjustment vernier scale position makes main scale plug 13 and vernier scale plug
23 are inserted into inside two sleeves 7 respectively, apply appropriate pressure, and making ruler, edge is bonded closely with socket port beyond the Great Wall, realizes that main scale is carved
The automatic alignment of degree, vernier scale scale and sleeve centerline carries out reading, according to reading knot to the main scale and the vernier scale
Fruit measures and records the centre-to-centre spacing of sleeve 7；
S5, using the centre-to-centre spacing for measuring other sleeves 7 one by one with step S4 same procedures；
S6, according to measurement result, the deviation of the centre-to-centre spacing of the joint bar 5 of correspondence position and the centre-to-centre spacing of sleeve 7 is calculated, with matter
Amount acceptance specification requirement is compared, and completes the examination to prefabricated components grout sleeve and joint bar position.
Number reading method is in S2 and S4：The number of the corresponding main scale scale 111 of the start index of vernier scale scale 211 during reading
It is main scale numerical value to be worth, and the numerical value in vernier scale scale 211 with the closest graduation mark to align in main scale scale 111 is vernier
Main scale numerical value and vernier scale numerical value are added as the measurement result of the centre-to-centre spacing of joint bar 5 and the centre-to-centre spacing of sleeve 7 by footage value.
Such as shown in Fig. 2, numerical value, that is, main scale numerical value of the corresponding main scale scale 111 of 2 start index of vernier scale is 418mm, vernier scale
In scale 211 in main scale scale 111 closest to the numerical value i.e. vernier scale numerical value of graduation mark to align, in vernier scale scale 211
23rd article of graduation mark is with main scale scale 111 closest to aliging, and therefore, vernier scale numerical value is 23*0.02=0.46mm, by main scale number
Value 418mm and vernier scale numerical value 0.46mm is added as the centre-to-centre spacing 418.46mm of joint bar 5 to be measured.
Claims (9)
1. device is checked and accepted in a kind of prefabricated components grout sleeve and joint bar position, which is characterized in that described including main scale and vernier scale
Main scale includes main scale ruler body, for the main scale plug to the locking main scale recess of joint bar progress and for being caught in sleeve inner, institute
Main scale ruler body is stated equipped with main scale scale, the center line of the main scale recess, center line and the main scale of the main scale plug are carved
The start index of degree is conllinear, and the vernier scale is set on the main scale ruler body, and the vernier scale includes vernier scale ruler body, is used for
Locking vernier scale recess is carried out to joint bar and the vernier scale plug for being caught in sleeve inner, the vernier scale ruler body are equipped with
Vernier scale scale, the starting of the center line of the vernier scale recess, the center line of the vernier scale plug and the vernier scale scale
Scale is conllinear.
2. device is checked and accepted in prefabricated components grout sleeve according to claim 1 and joint bar position, which is characterized in that the master
Ruler recess, the main scale plug, the vernier scale recess and the vernier scale plug are sheet body structure.
3. device is checked and accepted in prefabricated components grout sleeve according to claim 1 and joint bar position, which is characterized in that the master
Ruler recess and the vernier scale recess are sheet body structure, and the main scale plug and the vernier scale plug are cone structure.
4. device is checked and accepted in prefabricated components grout sleeve according to claim 3 and joint bar position, which is characterized in that the master
Ruler recess and the vernier scale recess are wedge shape, and the main scale plug and the vernier scale plug are cone.
5. device is checked and accepted in prefabricated components grout sleeve according to claim 4 and joint bar position, which is characterized in that the wedge
The apex angle of shape is 30~60 °, upper opening 50mm, 30~60 ° of apex angle, the base diameter 50mm of the cone.
6. device is checked and accepted in prefabricated components grout sleeve according to claim 1 and joint bar position, which is characterized in that the trip
Scale is equipped with trip bolt, and the vernier scale is fixed on the main scale by the trip bolt.
7. device is checked and accepted in prefabricated components grout sleeve according to claim 6 and joint bar position, which is characterized in that described tight
Gu screw is located on the vernier scale ruler body.
8. a kind of prefabricated components grout sleeve and joint bar position acceptance method, which is characterized in that comprise the following steps：
S1, determine that applying man-hour requirement corresponds to one group of joint bar of installation and the position of sleeve, cleans out in joint bar surface and sleeve
Wall surface；
S2, selection need measuring center away from two joint bars, use the prefabricated components as any one of claim 1 to 7
Device is checked and accepted in grout sleeve and joint bar position, and the main scale is vertical with the holding of joint bar axis, adjusts the vernier scale position, makes
The main scale recess and the vernier scale recess block two joint bars respectively, apply appropriate pressure, make recess inner edge and joint bar table
Face is held out against, and realizes main scale scale, the automatic alignment of vernier scale scale and joint bar center line, to the main scale and the vernier scale into
Row reading records joint bar centre-to-centre spacing according to reading result；
S3, other joint bar centre-to-centre spacing are measured one by one using with step S2 same procedures；
S4, selection need measuring center away from two sleeves, use the prefabricated components as any one of claim 1 to 7
Device is checked and accepted in grout sleeve and joint bar position, and the main scale is vertical with sleeve axis holding, adjusts the vernier scale position, makes
The main scale plug and the vernier scale plug are inserted into two sleeve inners respectively, apply appropriate pressure, make ruler edge and socket end beyond the Great Wall
Mouth fitting is close, the automatic alignment of main scale scale, vernier scale scale and sleeve centerline is realized, to the main scale and the vernier
Ruler carry out reading, according to reading result record bushing core away from；
S5, using with step S4 same procedures measure one by one other bushing cores away from；
S6, according to measurement result, calculate correspondence position joint bar centre-to-centre spacing and bushing core away from deviation, with inspection of quality specification
It is required that being compared, the examination to prefabricated components grout sleeve and joint bar position is completed.
9. prefabricated components grout sleeve according to claim 8 and joint bar position acceptance method, which is characterized in that S2 and S4
Described in number reading method be：The numerical value of the corresponding main scale scale of the start index of the vernier scale scale is main scale number during reading
It is worth, the numerical value in the vernier scale scale with the closest graduation mark to align in the main scale scale is vernier scale numerical value, will
The main scale numerical value and the vernier scale numerical value be added as joint bar centre-to-centre spacing and bushing core away from measurement result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710352644.0A CN108072313A (en) | 2017-05-18 | 2017-05-18 | Prefabricated part grouting sleeve and joint bar position acceptance device and acceptance method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710352644.0A CN108072313A (en) | 2017-05-18 | 2017-05-18 | Prefabricated part grouting sleeve and joint bar position acceptance device and acceptance method |
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| CN108072313A true CN108072313A (en) | 2018-05-25 |
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ID=62159120
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|---|---|---|---|
| CN201710352644.0A Pending CN108072313A (en) | 2017-05-18 | 2017-05-18 | Prefabricated part grouting sleeve and joint bar position acceptance device and acceptance method |
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| CN (1) | CN108072313A (en) |
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| CN109099986A (en) * | 2018-09-06 | 2018-12-28 | 北京市建筑设计研究院有限公司 | The visual detection and bracing means and method of reinforcing bar connection grout sleeve |
| CN113530740A (en) * | 2021-06-02 | 2021-10-22 | 中国长江电力股份有限公司 | Device and method for accurately measuring chord distance of stator positioning rib of hydroelectric generating set |
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| CN113530740A (en) * | 2021-06-02 | 2021-10-22 | 中国长江电力股份有限公司 | Device and method for accurately measuring chord distance of stator positioning rib of hydroelectric generating set |
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Application publication date: 20180525 |