CN108643366B - High-precision pre-burying device and positioning method suitable for vertical shaft bar-shaped keels - Google Patents
High-precision pre-burying device and positioning method suitable for vertical shaft bar-shaped keels Download PDFInfo
- Publication number
- CN108643366B CN108643366B CN201810739043.XA CN201810739043A CN108643366B CN 108643366 B CN108643366 B CN 108643366B CN 201810739043 A CN201810739043 A CN 201810739043A CN 108643366 B CN108643366 B CN 108643366B
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- positioning
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- vertical shaft
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- clamping
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 17
- 239000010959 steel Substances 0.000 claims abstract description 17
- 238000010276 construction Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 229920003002 synthetic resin Polymers 0.000 claims description 3
- 239000000057 synthetic resin Substances 0.000 claims description 3
- 239000012634 fragment Substances 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/18—Adjusting tools; Templates
- E04G21/1841—Means for positioning building parts or elements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention discloses a device and a positioning method suitable for high-precision embedding of a vertical shaft strip-shaped keel, comprising a laser emission device and a positioning device, wherein the positioning device comprises a positioning platform, an adjusting device and a base platform, the positioning platform and the base platform are of two sector-shaped disc structures corresponding to each other, the positioning platform and the base platform are connected through an I-shaped steel, a clamping groove is formed in the position, corresponding to the circular arc edge of the base platform, of an embedded part, and a light-transmitting positioning hole is formed in the central angle of the positioning platform; at least 2 adjusting devices are arranged on the inner side of the circular arc edge of the positioning platform, the distance between the positioning platform and the well wall is adjusted to enable the center of the light-transmitting positioning hole to coincide with the center of the bottom of the vertical shaft through laser, and the position of the positioning device is determined; the clamping device is arranged in the middle of the inner side of the clamping groove, and the keel embedded part is fixed. The positioning device can accurately and rapidly position the keel embedded part; and the positioning error of the positioning device is reduced by utilizing a laser positioning mode.
Description
Technical Field
The invention relates to the technical field of embedded part installation, in particular to the technical field of high-precision installation of a vertical shaft bar-shaped keel embedded part.
Background
The shaft embedded part is a component which is pre-installed in the shaft and is used for lapping when the superstructure is built. As the number of the strip-shaped keel embedded parts in the vertical shaft is numerous, the precision requirement is very high, and the common construction method not only consumes a great deal of time and labor cost, but also is difficult to meet the precision requirement of installation.
Disclosure of Invention
The invention aims to provide a device and a positioning method suitable for high-precision embedding of a vertical shaft strip-shaped keel, so as to solve the problems.
The device suitable for high-precision pre-embedding of the vertical shaft bar-shaped keels comprises a laser emission device and a positioning device, wherein the laser emission device is arranged at the center of the bottom of the vertical shaft, and the positioning device is arranged in the vertical shaft and above the laser emission device; the positioning device comprises a positioning platform, an adjusting device and a base platform, wherein the positioning platform and the base platform are of two fan-shaped disc-shaped structures which are arranged up and down, have the same table top level and radius, have right angles and are completely corresponding to each other, the positioning platform and the base platform are connected through an I-shaped steel, clamping grooves are formed in the positions, corresponding to the embedded parts, of the circular arc edges of the positioning platform and the base platform, of the positioning platform, light-transmitting positioning holes are formed in the positions, corresponding to the embedded parts, of the circular arc edges of the positioning platform, the number and the positions of the clamping grooves of the positioning platform are the same as those of the base platform, the connecting line of the centers of the light-transmitting positioning holes of the positioning platform and the centers of the light-transmitting positioning holes of the base platform are perpendicular to the horizontal direction, hanging points are arranged on the upper part of the positioning platform, and pulleys are arranged on the lower part of the base platform; at least 2 adjusting devices are arranged on the inner side of the circular arc edge of the positioning platform, each adjusting device comprises a support, an adjusting screw rotating motor and an adjusting screw motor control device, the support is connected to the positioning platform, a horizontal threaded through hole is formed in the support, the adjusting screw penetrates through the threaded through hole and is connected with the adjusting screw rotating motor, the adjusting screw motor control device controls the adjusting screw rotating motor to rotate positively and reversely to drive the adjusting screw to advance and retreat, and therefore the distance between the positioning platform and a well wall is adjusted to enable the center of a light-transmitting positioning hole to coincide with the center of the bottom of a vertical shaft to enable the center of the light-transmitting positioning hole to coincide with the center of the bottom of the vertical shaft to be laser, and the position of the positioning device is determined; the clamping device is arranged in the middle of the inner side of the clamping groove and comprises a square support, a clamping screw rotating motor and a clamping screw motor control device, and the clamping screw motor control device controls the clamping screw rotating motor to rotate positively and negatively to drive the clamping screw to advance and retreat, so that the keel embedded part is fixed.
Further, 2 adjusting devices are arranged on the positioning platform, and the 2 adjusting devices are respectively arranged at two ends of the circular arc edge of the positioning platform.
Furthermore, at least 2 adjusting devices are arranged on the base platform, and the positions of the adjusting devices on the base platform are the same as the number and positions of the adjusting devices on the positioning platform.
Furthermore, the adjusting screw motor control device and the clamping screw motor control device are wireless remote control devices, and work of the motors is controlled through wireless remote control.
Further, the adjusting screw rotating motor and the clamping screw rotating motor are of the same model, all motors are numbered through codes, and all motors needing to rotate are controlled by the unified remote controller.
Further, all motors are powered by an external power supply.
Further, the positioning platform and the base platform are made of steel plates and are fixedly connected by welding of the I-shaped steel, an escalator is arranged between the positioning platform and the base platform, and the escalator is arranged at the straight edge of the positioning platform and the straight edge of the base platform directly.
Furthermore, the light-transmitting positioning hole is provided with a positioning sheet which is made of light-transmitting synthetic resin material.
A high-precision embedded positioning method for a vertical shaft bar-shaped keel, which is used for the block positioning device suitable for the high-precision embedded of the vertical shaft bar-shaped keel, comprises the following steps:
firstly, installing a positioning device on site, and arranging a laser emitting device in the center of the bottom of a vertical shaft;
secondly, hanging the positioning device above the construction platform;
thirdly, according to positioning points of the corresponding adjusting device on the shaft wall of the vertical shaft, moving the positioning device by utilizing the bottom pulley, and aligning the front end of an adjusting screw of the adjusting device to the positioning points;
fourthly, enabling the laser beam at the bottom of the vertical shaft to coincide with the center of the light-transmitting positioning hole by adjusting an adjusting screw of the adjusting device;
fifthly, fixing the positioning device by utilizing a hydraulic jack and channel steel;
sixthly, sequentially inserting the keel embedded parts into clamping grooves of the positioning device;
seventh, fixing the positions of the keel embedded parts on the positioning platform and the base platform respectively by using clamping devices;
eighth step, welding the fixed keel embedded part on the wall of the vertical shaft;
and ninth, removing the fixed channel steel, moving the positioning device to the next embedded part installation area, and repeating the third to eighth steps.
Further, when the sixth step is executed, the keel embedded parts are required to be inserted into corresponding clamping grooves of the positioning platform and the base platform at the same time; when the seventh step is executed, the radial distance between the keel embedded part and the inner side edge of the clamping groove is measured according to the construction size requirement when the keel embedded part is fixed by the clamping device.
The beneficial effects of the invention are as follows: the provided positioning device can accurately and rapidly position the keel embedded part; the positioning error of the positioning device is reduced by utilizing a laser positioning mode; the fan-shaped device structure and the using method are more flexible, and the material cost is saved.
Drawings
Fig. 1 is a schematic structural view of a device suitable for high-precision embedding of a vertical shaft bar-shaped keel.
Fig. 2 is a top view of a device suitable for high-precision embedding of vertical shaft bar keels.
Fig. 3 is an elevation view of a device suitable for high precision embedment of shaft bar keels.
Fig. 4 is a schematic structural view of the adjusting device.
Fig. 5 is a schematic structural view of the clamping device.
Fig. 6 is a schematic structural view of the spacer.
In the figure, a 1-positioning platform, a 2-base platform, 11-I-shaped steel, a 12-escalator, a 13-clamping device, a 14-adjusting device, a 15-pulley, a 21-clamping groove, a 41-support, a 42-adjusting screw, a 51-square support, a 52-clamping screw and a 61-light-transmitting positioning hole are arranged.
Detailed Description
Example 1
As shown in fig. 1-3, the device suitable for high-precision pre-embedding of the vertical shaft bar-shaped keels comprises a laser emitting device and a positioning device, wherein the laser emitting device is arranged at the bottom center of the vertical shaft, and the positioning device is arranged in the vertical shaft and above the laser emitting device; the positioning device comprises a positioning platform 1, an adjusting device 14 and a base platform 2, wherein the positioning platform 1 and the base platform 2 are of two fan-shaped disc-shaped structures which are arranged up and down, are horizontal in table top, have the same radius, have right angles in central angles and are completely corresponding to each other, the positioning platform 1 and the base platform 2 are connected through an I-shaped steel 11, clamping grooves 21 are formed in positions of the positioning platform 1, corresponding to the circular arc edges of the base platform 2, of embedded parts, light-transmitting positioning holes 61 are formed in central angles, the number and positions of the clamping grooves of the positioning platform 1 are the same as those of the clamping grooves of the base platform 2, the connecting line of the centers of the light-transmitting positioning holes of the positioning platform 1 and the centers of the light-transmitting positioning holes of the base platform 2 are perpendicular to the horizontal direction, a hanging point is arranged at the upper part of the positioning platform 1, and a pulley 15 is arranged at the lower part of the base platform 2; at least 2 adjusting devices 14 are installed on the inner side of the circular arc edge of the positioning platform 1, as shown in fig. 4, each adjusting device 14 comprises a support 41, an adjusting screw 42, an adjusting screw rotating motor and an adjusting screw motor control device, the support 41 is connected to the positioning platform 1, a horizontal threaded through hole is formed in the support 41, the adjusting screw 42 passes through the threaded through hole and is connected with the adjusting screw rotating motor, the adjusting screw motor control device controls the adjusting screw rotating motor to rotate positively and negatively to drive the adjusting screw 42 to advance and retreat, so that the distance between the positioning platform and a shaft wall is adjusted to enable the center of a light-transmitting positioning hole to coincide with the center of the bottom of a shaft, and the position of the positioning device is determined; the clamping device 13 is arranged in the middle of the inner side of the clamping groove 21, as shown in fig. 5, the clamping device 13 comprises a square support 51, a clamping screw 52, a clamping screw rotating motor and a clamping screw motor control device, and the clamping screw motor control device controls the clamping screw rotating motor to rotate positively and negatively to drive the clamping screw 52 to advance and retreat, so that the keel embedded part is fixed.
The adjusting screw motor control device and the clamping screw motor control device are wireless remote control devices, and work of the motors is controlled through wireless remote control. The adjusting screw rotating motor and the clamping screw rotating motor are of the same model, all the motors are numbered through codes, and all the motors which need to rotate are controlled by a unified remote controller. All motors are powered by an external power supply.
The positioning platform 1 and the base platform 2 are made of steel plates and are fixedly connected by an I-shaped steel 11 in a welded mode, an escalator 12 is arranged between the positioning platform 1 and the base platform 2 and is used for people to walk up and down, and the escalator 12 is arranged at the straight edge of the positioning platform 1 and the straight edge of the base platform 2 directly. As shown in fig. 6, the light-transmitting positioning hole 61 is provided with a positioning sheet made of a light-transmitting synthetic resin material.
The positioning platform 1 is a platform with a clamping groove 21 at one edge, the spacing between the clamping grooves 21 is the same as the spacing between the longitudinal keel embedded parts, the positions of the clamping grooves 21 are manufactured according to high-precision scales, and the mounting position accuracy of the embedded parts is ensured.
Example 2
This example was modified based on example 1.
The positioning platform 1 is provided with 2 adjusting devices 14, and the 2 adjusting devices 14 are respectively arranged at two ends of the circular arc edge of the positioning platform. On the circular arc edge of the positioning device, 2 adjusting devices 14 are symmetrically arranged at an interval of 90 degrees. The base platform 2 is also provided with 2 adjusting devices 14, and the positions of the adjusting devices 14 on the base platform 2 are the same as the number and positions of the adjusting devices 14 on the positioning platform 1.
Example 3
The high-precision pre-embedding positioning method for the vertical shaft bar-shaped keels, which is used for the device suitable for the high-precision pre-embedding of the vertical shaft bar-shaped keels and is described in the embodiment 1 or 2, comprises the following steps:
firstly, installing a positioning device on site, and arranging a laser emitting device in the center of the bottom of a vertical shaft;
secondly, hanging the positioning device above the construction platform;
thirdly, moving the positioning device by utilizing the bottom pulley 15 according to the positioning point of the corresponding adjusting device on the shaft wall of the vertical shaft, and aligning the front end of the adjusting screw 42 of the adjusting device 14 to the positioning point;
fourthly, the center of the laser beam at the bottom of the vertical shaft is overlapped with the center of the light-transmitting positioning hole 61 by adjusting the adjusting screw rod 42 of the adjusting device 14;
fifthly, fixing the positioning device by utilizing a hydraulic jack and channel steel;
sixthly, sequentially inserting the keel embedded parts into the clamping grooves 21 of the positioning device;
seventh, fixing the positions of the keel embedded parts on the positioning platform 1 and the base platform 2 by using clamping devices 13 respectively;
eighth step, welding the fixed keel embedded part on the wall of the vertical shaft;
and ninth, removing the fixed channel steel, moving the positioning device to the next embedded part installation area, and repeating the third to eighth steps.
When the sixth step is executed, the keel embedded parts are simultaneously inserted into the corresponding clamping grooves 21 of the positioning platform 1 and the base platform 2; when the seventh step is executed, the radial distance between the keel embedded part and the inner side edge of the clamping groove 21 is measured according to the construction size requirement when the keel embedded part is fixed by the clamping device 13.
Finally, it should be pointed out that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting. Although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. Device suitable for shaft bar fossil fragments high accuracy is pre-buried, its characterized in that: the device comprises a laser emission device and a positioning device, wherein the laser emission device is arranged at the bottom center of a vertical shaft, and the positioning device is arranged in the vertical shaft and above the laser emission device; the positioning device comprises a positioning platform (1), an adjusting device (14) and a base platform (2), wherein the positioning platform (1) and the base platform (2) are of two fan-shaped disc-shaped structures which are arranged up and down, have the same table top level and radius, have right angles and are completely corresponding to each other, the positioning platform (1) and the base platform (2) are connected through an I-shaped steel (11), clamping grooves (21) are formed in the positions, corresponding to the circular arc edges of the positioning platform (1) and the base platform (2), of embedded parts, light-transmitting positioning holes (61) are formed in the central angles, the number and positions of the clamping grooves of the positioning platform (1) are the same as those of the base platform (2), the central connecting line of the light-transmitting positioning holes of the positioning platform (1) is perpendicular to the horizontal direction, hanging points are arranged on the upper part of the positioning platform (1), and pulleys (15) are arranged on the lower part of the base platform (2). At least 2 adjusting devices (14) are arranged on the inner side of the circular arc edge of the positioning platform (1), each adjusting device (14) comprises a support (41), an adjusting screw (42), an adjusting screw rotating motor and an adjusting screw motor control device, each support (41) is connected to the positioning platform (1), a horizontal threaded through hole is formed in each support (41), each adjusting screw (42) penetrates through each threaded through hole and is connected with the corresponding adjusting screw rotating motor, the adjusting screw motor control device controls the adjusting screw rotating motor to positively rotate and reversely rotate to drive the adjusting screw (42) to advance and retreat, and accordingly the distance between the positioning platform and a well wall is adjusted to enable the center of a light-transmitting positioning hole to coincide with the center of the bottom of a vertical shaft in a laser mode, and the position of each positioning device is determined; clamping device (13) is arranged in the middle of the inner side of clamping groove (21), clamping device (13) comprises square support (51), clamping screw (52), clamping screw rotating motor and clamping screw motor control device, clamping screw motor control device controls clamping screw rotating motor to rotate positively and negatively to drive clamping screw (52) to advance and retreat, and therefore keel embedded parts are fixed.
2. The device suitable for high-precision embedding of vertical shaft bar keels according to claim 1, characterized in that: the positioning platform (1) is provided with 2 adjusting devices (14), and the 2 adjusting devices (14) are respectively arranged at two ends of the circular arc edge of the positioning platform.
3. The device suitable for high-precision embedding of vertical shaft bar keels according to claim 1, characterized in that: at least 2 adjusting devices (14) are also arranged on the base platform (2), and the positions of the adjusting devices (14) on the base platform (2) are the same as the number and the positions of the adjusting devices (14) on the positioning platform (1).
4. The device suitable for high-precision embedding of vertical shaft bar keels according to claim 1, characterized in that: the adjusting screw motor control device and the clamping screw motor control device are wireless remote control devices, and work of the motors is controlled through wireless remote control.
5. The device suitable for high-precision embedding of vertical shaft bar keels according to claim 1, characterized in that: the adjusting screw rotating motor and the clamping screw rotating motor are of the same model, all the motors are numbered through codes, and all the motors which need to rotate are controlled by a unified remote controller.
6. The device suitable for high-precision embedding of vertical shaft bar keels according to claim 1, characterized in that: all motors are powered by an external power supply.
7. The device suitable for high-precision embedding of vertical shaft bar keels according to claim 1, characterized in that: the positioning platform (1) and the base platform (2) are made of steel plates and are fixedly connected by an I-shaped steel (11) in a welded mode, an escalator (12) is arranged between the positioning platform (1) and the base platform (2), and the escalator (12) is arranged on the straight edge of the positioning platform (1) and the straight edge of the base platform (2) directly.
8. The device suitable for high-precision embedding of vertical shaft bar keels according to claim 1, characterized in that: and the light-transmitting positioning holes (61) are provided with positioning sheets which are made of light-transmitting synthetic resin materials.
9. A method for positioning a vertical shaft bar-shaped keel in a high-precision pre-buried mode, which uses the block positioning device which is suitable for the vertical shaft bar-shaped keel in the high-precision pre-buried mode and is characterized by comprising the following steps:
firstly, installing a positioning device on site, and arranging a laser emitting device in the center of the bottom of a vertical shaft;
secondly, hanging the positioning device above the construction platform;
thirdly, according to the locating points of the corresponding adjusting devices on the shaft wall of the vertical shaft, the bottom pulley (15) is utilized to move the locating devices, and the front ends of the adjusting screws (42) of the adjusting devices (14) are aligned to the locating points;
fourthly, the center of the laser beam at the bottom of the vertical shaft is overlapped with the center of the light-transmitting positioning hole (61) through adjusting the adjusting screw (42) of the adjusting device (14);
fifthly, fixing the positioning device by utilizing a hydraulic jack and channel steel;
sixthly, sequentially inserting the keel embedded parts into the clamping grooves (21) of the positioning device;
seventh, fixing the positions of the keel embedded parts on the positioning platform (1) and the base platform (2) by using clamping devices (13) respectively;
eighth step, welding the fixed keel embedded part on the wall of the vertical shaft;
and ninth, removing the fixed channel steel, moving the positioning device to the next embedded part installation area, and repeating the third to eighth steps.
10. The embedded positioning method according to claim 9, wherein the keel embedded parts are simultaneously inserted into corresponding clamping grooves (21) of the positioning platform (1) and the base platform (2) when the sixth step is executed; when the seventh step is executed, the radial distance between the keel embedded part and the inner side edge of the clamping groove (21) is measured according to the construction size requirement when the keel embedded part is fixed by the clamping device (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810739043.XA CN108643366B (en) | 2018-07-06 | 2018-07-06 | High-precision pre-burying device and positioning method suitable for vertical shaft bar-shaped keels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810739043.XA CN108643366B (en) | 2018-07-06 | 2018-07-06 | High-precision pre-burying device and positioning method suitable for vertical shaft bar-shaped keels |
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| Publication Number | Publication Date |
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| CN108643366A CN108643366A (en) | 2018-10-12 |
| CN108643366B true CN108643366B (en) | 2023-08-15 |
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| CN201810739043.XA Active CN108643366B (en) | 2018-07-06 | 2018-07-06 | High-precision pre-burying device and positioning method suitable for vertical shaft bar-shaped keels |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3418782A (en) * | 1966-03-31 | 1968-12-31 | Andersson Sven | Anchors for the parapets of balconies |
| JP5077856B1 (en) * | 2011-11-14 | 2012-11-21 | 茂男 渡部 | Construction method and construction jig |
| CN204899252U (en) * | 2015-09-02 | 2015-12-23 | 北京城建十六建筑工程有限责任公司 | Built -in fitting accuracy control regulator |
| CN205296802U (en) * | 2015-10-16 | 2016-06-08 | 北京博大经开建设有限公司 | Well steel platform |
| CN208533729U (en) * | 2018-07-06 | 2019-02-22 | 中国人民解放军63926部队 | A kind of device (sectional type) pre-buried suitable for vertical shaft bar shaped keel high-precision |
-
2018
- 2018-07-06 CN CN201810739043.XA patent/CN108643366B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3418782A (en) * | 1966-03-31 | 1968-12-31 | Andersson Sven | Anchors for the parapets of balconies |
| JP5077856B1 (en) * | 2011-11-14 | 2012-11-21 | 茂男 渡部 | Construction method and construction jig |
| CN204899252U (en) * | 2015-09-02 | 2015-12-23 | 北京城建十六建筑工程有限责任公司 | Built -in fitting accuracy control regulator |
| CN205296802U (en) * | 2015-10-16 | 2016-06-08 | 北京博大经开建设有限公司 | Well steel platform |
| CN208533729U (en) * | 2018-07-06 | 2019-02-22 | 中国人民解放军63926部队 | A kind of device (sectional type) pre-buried suitable for vertical shaft bar shaped keel high-precision |
Non-Patent Citations (1)
| Title |
|---|
| 刘世斌 ; 杜峰峰 ; 张笈玮 ; .某发射工位导流槽绳锯切割拆除技术.施工技术.2015,(03),96-99. * |
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