CN113217782A - Extension type measuring instrument support for building construction - Google Patents
Extension type measuring instrument support for building construction Download PDFInfo
- Publication number
- CN113217782A CN113217782A CN202110478236.6A CN202110478236A CN113217782A CN 113217782 A CN113217782 A CN 113217782A CN 202110478236 A CN202110478236 A CN 202110478236A CN 113217782 A CN113217782 A CN 113217782A
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- Prior art keywords
- push rod
- rod
- sleeve
- mobile jib
- extension device
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- 238000009435 building construction Methods 0.000 title abstract description 11
- 238000010276 construction Methods 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/20—Undercarriages with or without wheels
- F16M11/24—Undercarriages with or without wheels changeable in height or length of legs, also for transport only, e.g. by means of tubes screwed into each other
- F16M11/242—Undercarriages with or without wheels changeable in height or length of legs, also for transport only, e.g. by means of tubes screwed into each other by spreading of the legs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
- F16M11/043—Allowing translations
- F16M11/045—Allowing translations adapted to left-right translation movement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/18—Heads with mechanism for moving the apparatus relatively to the stand
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses an extension type measuring instrument support for building construction, which comprises a longitudinal extension device and a transverse extension device, wherein the longitudinal extension device comprises a tripod, an adjustable screw, a main rod and an up-and-down sliding assembly, the tripod is used for fixing a device main body, the main rod is arranged on the tripod through the adjustable screw, so that the height of the main rod can be adjusted, the transverse extension device is arranged on the main rod through the sliding assembly, the transverse extension device can slide up and down on the main rod to adjust the position, the transverse extension device comprises a manual push rod device and a tubular sleeve, the tubular sleeve can extend towards the horizontal direction by rotating the manual push rod device, and the tubular sleeve is provided with a positioning rod to keep the device stable and can also be provided with other measuring instruments. The invention has simple structure, low manufacturing cost and convenient carrying, can carry out stretching type auxiliary positioning aiming at complex terrains, not only protects the safety of personnel, but also has obvious auxiliary measurement effect.
Description
Technical Field
The invention belongs to the technical field of constructional engineering measurement, and particularly relates to a constructional engineering measuring instrument support and an auxiliary positioning device.
Background
Engineering surveying is a science developed from practice, measurement work cannot be carried out from engineering start to completion, various plane positions and elevations on a design drawing are lofted on a construction working face by using measuring equipment (a GPS measuring instrument, a total station, a theodolite, a level gauge and the like) according to design requirements in the early stage of construction, the position of a building, the size and the installation position of the building are positioned in the construction, and whether various sizes and positions meet the requirements of the design drawing or not is rechecked after the construction is finished.
As is well known, an engineering measuring instrument support is an essential auxiliary device in the measuring process, but in areas with complex terrains, such as ditches, thorny trees or positions with small standing faces or suspended faces, of a side opening and the like, the traditional measuring instrument support has the problem that the accuracy of measured data is seriously influenced or cannot be erected and measured at all, and great inconvenience is brought to the measuring operation.
Disclosure of Invention
The invention aims to provide an extensible measuring instrument support for building construction, which is simple in structure and low in manufacturing cost, can perform extensible auxiliary positioning in a complicated terrain area where the traditional measuring support cannot be erected and positioned, improves the working efficiency of engineering measurement, and ensures the safety of measuring personnel in a dangerous area.
The invention is realized by the following steps:
the invention provides an extension type measuring instrument support for building construction, which comprises a longitudinal extension device and a transverse extension device, wherein the longitudinal extension device comprises a tripod, an adjustable screw, a main rod and a sliding assembly, the tripod is used for fixing a device main body, the main rod is arranged on the tripod through the adjustable screw, so that the height of the main rod can be adjusted, the transverse extension device is arranged on the main rod through the sliding assembly, and the transverse extension device can slide up and down on the main rod to adjust the position.
Preferably, vertical telescoping device include tripod, adjustable bolt, mobile jib and upper and lower slip subassembly, the tripod can be adjusted, can be used for fixing the device main part, also can finely tune to make mobile jib and ground keep perpendicular, the inside screw thread that is equipped with of mobile jib, the mobile jib passes through adjustable bolt and installs on the tripod, rotates the height that adjustable bolt can adjust the mobile jib, still be provided with on the mobile jib and be used for installing horizontal extension device slip subassembly.
Preferably, the sliding assembly comprises a sliding rail and a sliding table, the sliding rail is fixed on the main rod, the sliding table is used for installing a manual push rod device, the sliding table can slide up and down along the sliding rail, and the sliding table can be fixed on the sliding rail through a puller bolt after sliding to a specified position.
Preferably, the horizontal extension device include hand push rod ware and tubulose cover, hand push rod ware is including hand round and push rod sleeve, and hand push rod ware passes through the slip subassembly and installs perpendicularly on the mobile jib, makes hand push rod ware can pass through slip subassembly along the mobile jib up-down slip position regulation, the tubulose cover sets up on push rod sleeve's free end, can make the tubulose cover extend to the horizontal direction through rotating hand round.
Preferably, the push rod sleeve is provided with a level bubble for keeping the push rod sleeve horizontal, and the outer wall of the push rod sleeve is also provided with a supporting groove.
Preferably, the telescopic power tool further comprises a support rod, one end of the support rod is connected with the main rod through a hinge, the other end of the support rod can be clamped on a support groove in the outer wall of the push rod sleeve, the structure is more stable, and the support rod can be folded back when not used.
Preferably, the tubular sleeve is a sleeve with a circular hole in a side wall, the circular hole in the side wall is perpendicular to a through hole of the tubular sleeve, the circular hole is perpendicularly arranged at the free end of the telescopic rod, the two tubular sleeves are coaxially arranged, the side wall of the sleeve is provided with a screw hole and a fixing bolt arranged in the screw hole, the through hole of the tubular sleeve is used for installing a self-contained positioning rod or a tower ruler, the positioning rod can be tightly fixed in the tubular sleeve by screwing the fixing bolt, and the positioning rod can be used for installing and fixing measuring instruments such as a GPS (global positioning system) machine head and a prism and can also be used for being supported on the ground to enable the transverse extension device to be more stable.
The invention has the beneficial effects that:
the invention provides an extension type measuring instrument support for building construction, which mainly aims at solving the problem that a traditional measuring support is difficult to erect and position in a complex terrain or a critical area with high risk which is difficult to reach by some personnel.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a basic structure of an extended measuring instrument support for building construction according to an embodiment of the present invention.
Fig. 2 is a sectional view of a manual push rod in an extended gauge stand for construction according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a tubular sleeve in an extensional measuring instrument support for building construction according to an embodiment of the present invention.
Fig. 4 is a schematic work flow diagram of an extended gauge stand for building construction according to an embodiment of the present invention.
In the figure: 1-tripod, 2-adjustable screw, 3-main rod, 4-slide rail, 5-sliding table, 6-puller bolt, 7-measuring instrument, 8-push rod sleeve, 9-hand wheel, 10-mounting bracket, 11-telescopic rod, 12-push rod sleeve, 13-tubular sleeve, 14-positioning rod, 15-level bubble, 16-supporting rod, 17-supporting groove, 18-hinge, 19-fixing bolt, 20-screw, 21-bearing, 22-complex terrain area, 23-extension type measuring instrument bracket.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention discloses an extension type measuring instrument support for building construction, which comprises a longitudinal extension device and a transverse extension device as shown in figure 1, wherein the longitudinal extension device comprises a tripod 1, an adjustable screw 2, a main rod 3 and a sliding assembly, the tripod 1 is used for fixing a device main body on the ground, the main rod 3 is arranged on the tripod 1 through the adjustable screw 2, so that the height of the main rod 3 can be adjusted, the transverse extension device is arranged on the main rod 3 through the sliding assembly, so that the transverse extension device can slide up and down on the main rod 3 to adjust the position, the transverse extension device comprises a manual push rod device and a tubular sleeve 13, the tubular sleeve 13 can extend towards the horizontal direction by rotating the manual push rod device, the tubular sleeve 13 is used for arranging a tower ruler or a positioning rod, and the positioning rod is used for installing a measuring instrument 7 such as a machine head or a prism.
Specifically, the method comprises the following steps:
as shown in fig. 1, as a preferred embodiment, the longitudinal expansion device comprises a tripod 1, an adjustable screw 2, a main rod 3 and a sliding assembly, the adjustable tripod 1 commonly used in engineering measurement adopted by the tripod 1 has good stability, can adjust the verticality of the main rod 3 and is easy to purchase, the main rod 3 is a hollow tube with threads inside, the adjustable screw 2 is a screw rod matched with the internal threads of the main rod 3, one end of the adjustable screw 2 is connected with the main rod 3 by threads, the other end of the adjustable screw is connected with the tripod 1 by a bearing, the main rod 3 is mounted on the tripod 1 by the adjustable screw 2, the height of the main rod 3 can be adjusted by rotating the adjustable screw 2, the main rod 3 is further provided with an upper sliding assembly and a lower sliding assembly, the sliding assembly comprises a sliding rail 4 and a sliding table 5, the sliding rail 4 is fixed on the main rod 3, the sliding table 5 is mounted, still be equipped with on the slip table 5 and withstand the puller bolt 6 of slide rail 4, send out puller bolt 6 and enable the slip table and can slide from top to bottom along slide rail 4, also can lock slip table 5 on slide rail 4 through screwing up puller bolt 6 after sliding to suitable position.
As a preferred embodiment, a rack is arranged on the sliding rail 4, a gear meshed with the rack and a screwing handle fixedly connected with the gear are arranged on the sliding table 5, and the sliding table 5 is convenient to control the distance of moving up and down through the structural cooperation of the rack and the rack.
As shown in fig. 1 and 2, the horizontal extension device includes two pairs of manual push rod wares and two tubulose covers 13 from top to bottom, and every manual push rod ware is all installed on slip table 5 of a slip subassembly, and two tubulose covers 13 are installed respectively at the front end of two movable push rod wares, and two upper and lower manual push rod ware structures are the same, for example can adopt the manual push rod ware that has wide application on the market, manual push rod ware is including hand wheel 9, installing support 10, push rod sleeve 8 and telescopic link 11, be equipped with the screw rod 20 through the installation of bearing 21 in the push rod sleeve, hand wheel 9 is installed at push rod sleeve afterbody and with inside screw rod 20 fixed mounting, telescopic link 11 is installed in push rod sleeve 8 through the slip guide structure, and telescopic link 11 is close to that the end of screw rod 20 and is equipped with the screw rod through-hole of screw rod 20 cooperation installation, rotates hand wheel 9 and can drive the screw rod 20 rotatory and with telescopic link 11 outside push rod sleeve 8 the push rod sleeve 8 manual push rod ware through self-releasing The installing support 10 of area is installed perpendicularly on slip table 5 on mobile jib 3, make manual push rod ware can pass through slip subassembly along mobile jib 3 upper and lower slip adjusting position and locking, all install the air level 15 that is used for detecting 8 levelness of push rod sleeve on two upper and lower push rod sleeve 8, rotate hand wheel 9 and can guarantee that telescopic link 11 in the push rod sleeve 8 extends along the horizontal direction, and still be provided with on being arranged in the outer wall of a push rod sleeve 12 in the manual push rod ware of top and be used for letting bracing piece 16 support and fixed support groove 17 to manual push rod ware.
As a better embodiment, the scale is arranged on the manual push rod device, the telescopic length of the telescopic rod 11 can be read, so that the two tubular sleeves 13 can be ensured to be in a coaxial state, and the verticality of the positioning rod 14 can be improved.
As shown in fig. 1 and 3, the tubular sleeve 13 has two tubular sleeves, each of the two tubular sleeves 13 has a main structure of a sleeve with a circular hole on a side wall, the circular hole on the side wall is perpendicular to the through hole of the tubular sleeve 13, the sleeve is vertically installed at the free end of the telescopic rod 11 through the circular hole, the two tubular sleeves 13 are coaxially arranged, the side wall of the sleeve is provided with a screw hole and a fixing bolt 19 installed in the screw hole, the through hole of the tubular sleeve 13 is used for installing a self-contained positioning rod 14 or a tower ruler, the positioning rod 14 can be tightly fixed in the tubular sleeve 13 by screwing the fixing bolt 19, the positioning rod 14 can be used for installing and fixing measuring instruments 7 such as a GPS handpiece, a prism and the like, and can also be used for enabling the transverse extension device to stand on the ground when the device is used for extension type positioning, thereby increasing the stability of the device.
As shown in figure 1, because the manual handspike and the main rod 3 are vertically arranged, the two tubular sleeves 13 are coaxially arranged and vertically arranged on the telescopic rod, the axial lead of the tubular sleeve 13 and the axial lead of the main rod 3 can be always kept parallel by reading the extension length of the manual handspike, when the extension lengths of the two manual handspikes are the same, according to the quadrilateral principle, and the tripod 1 can be finely adjusted by observing the leveling bubble 15 on the handspike sleeve 8, so that the main rod 3 and the positioning rod 14 and the measuring instrument 7 on the tubular sleeve 13 can be kept vertical to the ground when the handspike sleeve 8 is kept horizontal, and it should be noted that the invention has higher requirement on the verticality, only is an auxiliary instrument such as a tower ruler, when the invention carries a GPS measuring instrument, a total station, a theodolite and the like through the positioning rod 14, high vertical accuracy is not required, and complicated vertical degree correction is not required.
As shown in fig. 1, in the embodiment of the present invention, a stay 16 is provided on the main rod 3 through a hinge 18, and the other end of the stay 16 can be supported and clamped on a support groove 17 on the outer wall of the first push rod sleeve 12, so that the structure is more stable, and the main rod 3 can be folded back when not in use.
The working process of the invention is as follows:
as shown in FIG. 4, when the extended measuring instrument support for building construction provided by the invention is used for measuring in a complicated terrain area, firstly, the device is fixed near a detection point by opening the tripod, the height of the main rod 3 (which is larger than the landing height of the positioning rod 14) is adjusted through the adjustable screw rod 2 according to actual conditions, after the height of the main rod 3 is adjusted properly, measuring equipment (GPS measuring instrument, total station, theodolite, level gauge and the like) is installed on the positioning rod 14, the positioning rod 14 is installed in the two tubular sleeves 13, the positioning rod is fixed with the tubular sleeves 13 through the fixing bolt 19, according to the position condition of a required measuring point, the telescopic rod 11 is transversely extended by rotating the hand wheel 9 on the hand rocker, so that the positioning rod 14 carrying the measuring equipment reaches the upper space of a corresponding position, and then the height of the hand rocker is reduced through the sliding component, make locating lever 14 slowly descend, the bottom falls to the ground, in the process of descending, then detect the levelness of two manual putter through air level 15, and in time adjust two manual putter relative altitude and fine setting tripod 1, make two manual putter keep the level, because manual putter is the vertical state with tubulose cover 13, and because the installation of locating lever 14 makes two tubulose covers 13 keep coaxial state, so, when two manual putter keep the horizontality, locating lever 14 keeps vertical state naturally, last support for push rod sleeve 8 through propping up vaulting pole 16, make horizontal extension device more firm, thereby the erection and the positioning work of measuring instrument 7 in earlier stage has been accomplished, also made preparation for subsequent engineering measurement when having guaranteed measurement accuracy.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. The utility model provides an extension formula measuring instrument support for construction which characterized in that: including vertical telescoping device and horizontal extension device, vertical telescoping device includes tripod, adjustable screw rod, mobile jib and slip subassembly, and the mobile jib passes through adjustable screw rod to be installed on the tripod, rotates the height that adjustable screw rod can adjust the mobile jib, horizontal extension device includes two manual push rod wares and installs the tubulose cover at manual push rod ware front end, and two manual push rod wares are installed on the mobile jib through two upper and lower slip subassemblies, make manual push rod ware pass through slip subassembly can slide adjusting position from top to bottom along the mobile jib, the tubulose cover sets up on push rod sleeve's free end, and flexible through manual push rod ware enables the tubulose cover to extend to the horizontal direction.
2. An extended gauge stand for construction according to claim 1, wherein: the sliding assembly comprises a sliding rail and a sliding table, the sliding rail is fixed on the main rod, the sliding table is used for installing a manual push rod device, a tightening bolt capable of propping the sliding rail is further arranged on the sliding table, the sliding table can slide up and down along the sliding rail, and the sliding table can be fixed on the sliding rail through the tightening bolt after sliding to a specified position.
3. An extended gauge stand for construction according to claim 1, wherein: manual putter includes hand wheel, push rod sleeve and telescopic link, be equipped with the screw rod through the bearing installation in the push rod sleeve, hand wheel install at push rod sleeve afterbody and with screw rod fixed mounting, the telescopic link passes through the slip guide structure and installs in the push rod sleeve, the telescopic link is close to the screw rod and is equipped with the screw thread through-hole of screw rod cooperation installation, be provided with on the push rod sleeve and be used for letting push rod sleeve keep horizontally air level, still be provided with on the push rod sleeve's the outer wall and support the groove.
4. An extended gauge stand for construction according to claim 1, wherein: the tubulose cover has two, and its major structure all is the sleeve of opening the cylinder that has the round hole and is provided with fixing bolt on a lateral wall, the through-hole of round hole perpendicular to tubulose cover on the lateral wall, the tubulose cover passes through the round hole is installed perpendicularly at the free end of telescopic link, two tubulose cover coaxial settings make the axial lead of installing and sheatheeing in the sopwith staff or locating lever and mobile jib axial lead can keep parallel on the tubulose, the locating lever can be used to install measuring instruments such as fixed GPS aircraft nose, prism, also can be used for supporting and make the lateral extension device more stable subaerial.
5. An extended gauge stand for construction according to claim 1, wherein: still including the vaulting pole, vaulting pole one end passes through hinged joint with the mobile jib, and the other end can block on the support groove on the telescopic outer wall of push rod, makes the structure more stable, can also roll over when not on the mobile jib.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110478236.6A CN113217782B (en) | 2021-04-30 | 2021-04-30 | Extension type measuring instrument support for building construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110478236.6A CN113217782B (en) | 2021-04-30 | 2021-04-30 | Extension type measuring instrument support for building construction |
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| Publication Number | Publication Date |
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| CN113217782A true CN113217782A (en) | 2021-08-06 |
| CN113217782B CN113217782B (en) | 2022-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110478236.6A Active CN113217782B (en) | 2021-04-30 | 2021-04-30 | Extension type measuring instrument support for building construction |
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| Country | Link |
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| CN (1) | CN113217782B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116607449A (en) * | 2023-05-15 | 2023-08-18 | 中冶天工集团有限公司 | Point location lofting fixing device and application method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118729123B (en) * | 2024-09-03 | 2025-02-11 | 福建信息职业技术学院 | A guide structure for surveying and mapping equipment |
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| CN212254105U (en) * | 2020-07-14 | 2020-12-29 | 南京林业大学 | A Prism Holder for Accurate and Fast Stakeout of Total Stations |
| CN112304279A (en) * | 2020-10-22 | 2021-02-02 | 中交第二航务工程局有限公司 | Device and method for adjusting vertical degree of tower ruler |
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2021
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CA2042715A1 (en) * | 1990-06-11 | 1991-12-12 | Randall L. May | Adjustable tripod stand |
| CN102944228A (en) * | 2012-11-07 | 2013-02-27 | 北京七彩风景科技发展有限公司 | Adjustable precise lofting device |
| CN106595614A (en) * | 2016-12-30 | 2017-04-26 | 中南大学 | Slot raise cuthole precise lofting device and application method thereof |
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| CN211694201U (en) * | 2020-01-22 | 2020-10-16 | 陕西交通职业技术学院 | Electronic level bar code chi strutting arrangement |
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| CN116607449A (en) * | 2023-05-15 | 2023-08-18 | 中冶天工集团有限公司 | Point location lofting fixing device and application method |
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| CN113217782B (en) | 2022-08-19 |
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