CN107338956A - A kind of hole to be provided sleeve pipe and its application method - Google Patents
A kind of hole to be provided sleeve pipe and its application method Download PDFInfo
- Publication number
- CN107338956A CN107338956A CN201710601990.8A CN201710601990A CN107338956A CN 107338956 A CN107338956 A CN 107338956A CN 201710601990 A CN201710601990 A CN 201710601990A CN 107338956 A CN107338956 A CN 107338956A
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- China
- Prior art keywords
- center
- chain
- pole
- arc shrouds
- sleeve pipe
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Classifications
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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
- E04G15/00—Forms or shutterings for making openings, cavities, slits, or channels
- E04G15/06—Forms or shutterings for making openings, cavities, slits, or channels for cavities or channels in walls of floors, e.g. for making chimneys
-
- 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
- E04G15/00—Forms or shutterings for making openings, cavities, slits, or channels
- E04G15/06—Forms or shutterings for making openings, cavities, slits, or channels for cavities or channels in walls of floors, e.g. for making chimneys
- E04G15/063—Re-usable forms
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Revetment (AREA)
Abstract
The invention discloses a kind of hole to be provided sleeve pipe and its application method, its structure includes 2N pieces arc shrouds, fagging, fagging is in hub-and-spoke configuration and is configured with 2N extension, each extension in a tubular form and corresponding supports a piece of arc shrouds, it is used cooperatively with the extension of the fagging, it is each equipped with inserting the projection of extension inner chamber on the inwall of every arc shrouds, after the fagging is installed, all arc shrouds scrabble up circular tube shaped, that is every arc shrouds are to piece together 2N/mono- of rear pipe, and N here is >=1 natural number.A kind of hole to be provided sleeve pipe and its application method of the present invention compared with prior art, high recycling rate, effectively improves efficiency of construction, shortens worker and guards the time, saves material, practical, applied widely, has good application value.
Description
Technical field
The present invention relates to municipal construction equipment technical field, specifically a kind of hole to be provided sleeve pipe and its application method.
Background technology
In the electromechanical engineering construction of prior art, reserved a large amount of through-flooring holes, especially feedwater, draining, rain are required to
Water, air-conditioner water system are relatively conventional.Early stage, whether reserved opening quality height was smoothed out playing to pass to later stage electromechanical installation
Important effect.Conventional hole to be provided construction technology generally use PVC, steel sleeve pipe are directly pre-buried at present or are thus process
Common portable sleeve pipe.Need to be fixed in template with auxiliaries such as nail and tied silks for direct-burried sleeve pipe, and direct-burried set
Pipe and conventional portable sleeve pipe must be complete in concreting and extracted after reaching some strength, tight to time requirement, in extraction set
Artificial vestige can be left on concrete finished surface during pipe.Often occur during pre-buried in concrete sleeve pipe or cover
Situation that pipe can not take so can both destroy reserved opening, it is necessary to take out sleeve pipe by the way of tapping, again can be to sleeve pipe sheet
Body causes to damage, and prevents sleeve pipe from reusing.Traditional construction method is time-consuming, effort, consumptive material, has not met green construction
It is required that.
Based on above mentioned problem, the present invention proposes a kind of hole to be provided sleeve pipe and its application method, to solve existing technology
Defect.
The content of the invention
The technical assignment of the present invention is to be directed to above weak point, there is provided one kind can overcome prior art recycling rate of waterused
It is low, guard's time is long, hole to be provided sleeve pipe and its application method of reserved opening problem of poor quality.
A kind of hole to be provided sleeve pipe, its structure include 2N pieces arc shrouds, fagging, and fagging is in hub-and-spoke configuration and is configured with 2N
Extension, each extension in a tubular form and correspond to a piece of arc shrouds of support, are used cooperatively with the extension of the fagging,
It is each equipped with inserting the projection of extension inner chamber, after the fagging is installed, all arc shrouds on the inwall of every arc shrouds
Circular tube shaped is scrabbled up, i.e. every arc shrouds are to piece together 2N/mono- of rear pipe, and N here is >=1 natural number.
Per being flexibly connected between the adjacent arc shrouds of two panels by chain connector or loose-leaf, when using chain connector
During connection, the both ends of the chain connector are bolted in the adjacent arc shrouds of two panels respectively.
Two joint faces for being used to be connected with adjacent arc shrouds in every arc shrouds are inclined plane, two joint face
Respectively inclined plane one, inclined plane two, two joint faces of every arc shrouds can be used cooperatively, i.e., the inclination of every arc shrouds
Face one and the inclined plane two of adjacent arc shrouds are connected.
All arc shrouds are all connected on the shift mechanism for being placed on and piecing together in rear pipe, and the shift mechanism is by center
Bar, chain connector composition, one end of chain connector is fixed on the inwall of above-mentioned arc shrouds, the other end then passes through iron hoop
It is fixed on the outer wall of center-pole, the chain connector is divided into the N kinds that length sequence successively decreases：First chain, the second chain ...
N chains, and be linked in sequence between arc shrouds and center-pole, that is, connect the chain connector point of arc shrouds and center-pole
Wei not the first chain, the second chain ... N chains, the first chain, the second chain ... N chains.
All arc shrouds are all connected on the shift mechanism for being placed on and piecing together in rear pipe, and the shift mechanism is by center
Bar, central tube, chain connector composition, center-pole are socketed in central tube, and in the downside of center-pole, welding is configured with raised line, with
What the raised line was used cooperatively, slideway is offered on the downside of central tube, the length of the central tube is identical with arc shrouds length, in this
After heart sleeve pipe is placed on the pipe after piecing together Nei, its top, bottom with piece together after pipe flush；The chain connector
One end be fixed on the inwall of above-mentioned arc shrouds, the other end is then fixed on the outer wall of central tube by iron hoop, the chain
Connector is divided into the N kinds that length sequence successively decreases：First chain, the second chain ... N chains, and be linked in sequence in arc shrouds
Between central tube, that is, it is respectively the first chain, the second chain ... N to connect arc shrouds and the chain connector of central tube
Chain, the first chain, the second chain ... N chains.
When shift mechanism is made up of center-pole, chain connector, the recess for placing center-pole is offered on fagging；When carrying
When drawing mechanism is made up of center-pole, central tube, chain connector, the recess for placing center-pole is offered on fagging.
Handgrip is configured with the top of the center-pole, it is in " T " font that the handgrip coordinates with center-pole；The bottom of the center-pole
Screw thread drill bit is then configured with, the pipe after piecing together is stretched out in top, the bottom of the center-pole.
It is described piece together after pipe at the top of be configured with circular cover, the cover plate is socketed on center-pole and consolidated by nut
Fixed, corresponding, the top of center-pole is provided with the screw thread being used cooperatively with nut, and after cover plate is fixed, its excircle is with piecing together
Pipe excircle flush afterwards.
The arc shrouds are provided with four, and every arc shrouds are to piece together a quarter of rear pipe, corresponding, support
Plate is configured with four extensions, and the chain connector of shift mechanism is divided into different two kinds of length：First chain, the second chain.
The present invention also provides a kind of application method of hole to be provided sleeve pipe, and the implementation process of the application method is：
Drawing is consulted, according to beam or wall position, snap the line determines reserved opening center.
Snap the line determines reserved opening center first；
After determining reserved opening center, the pipe after piecing together is placed steadily, and the screw thread drill bit below center-pole is placed on
On reserved opening center；
Handgrip is rotated, the screw thread drill bit below center-pole is pierced into template, sleeve pipe is strutted with fagging after being fixedly secured, makes arc
Sleeve pipe is placed on reserved opening opening position；
After arc shrouds are placed by assigned position, square nut on rotation cover, cover plate is compressed downwards, arc shrouds are completed solid
It is fixed；
After concrete setting, loose nut, lift cover plate, fagging is taken out；
Rotary hand grip, the screw thread drill bit of center-pole is drilled out out of template；
Lift the handgrip of center-pole, sleeve pipe is integrally proposed out of concrete hole.
Compared to the prior art a kind of hole to be provided sleeve pipe and its application method of the present invention, has the advantages that：
The present invention a kind of hole to be provided sleeve pipe and its application method have less investment, convenient to assemble and disassemble, simple operation, conveniently moving,
The features such as economic and practical, present apparatus high recycling rate, efficiency of construction is effectively improved, shorten worker and guard the time, save material；
It need not be beaten after concrete setting, extraction is convenient, simple to operate, can improve reserved opening quality, not destroy concrete finished surface,
Avoid debris sleeve pipe；Fixation, prevent tube displacement；The present apparatus shortens the activity duration, saves cost of labor, subtracts
Lack waste of material, create preferable economic benefit, it is practical, it is applied widely, there is good application value.
Brief description of the drawings
Accompanying drawing 1 is overlooking surface structural representation of the invention.
Accompanying drawing 2 is A-A sectional views of the invention.
Accompanying drawing 3 is B-B sectional views of the invention.
Accompanying drawing 4 for the present invention C to sectional view.
Accompanying drawing 5 is fagging schematic diagram of the invention.
Mark in accompanying drawing represents respectively：
1st, handgrip, 2, nut, 3, cover plate, 4, arc shrouds, 5, bolt, 6, chain connector, the 7, first chain, 8, fagging, 9,
Projection, 10, central tube, 11, center-pole, the 12, second chain, 13, iron hoop, 14, raised line, 15, slideway, 16, inclined plane one, 17,
Inclined plane two, 18, recess.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment the invention will be further described.
As shown in accompanying drawing 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, a kind of hole to be provided sleeve pipe, its structure includes 2N pieces arc shrouds 4, support
Plate 8, fagging 8 is in hub-and-spoke configuration and is configured with 2N extension, and each extension is in a tubular form and the corresponding a piece of arc sleeve of support
Pipe 4, it is used cooperatively with the extension of the fagging 8, is each equipped with inserting in extension on the inwall of every arc shrouds 4
The projection 9 of chamber, after installing the fagging 8, all arc shrouds 4 scrabble up circular tube shaped, i.e. every arc shrouds 4 are to piece together rear pipe
2N/mono-, N here is >=1 natural number.
Per being flexibly connected between the adjacent arc shrouds 4 of two panels by chain connector 6 or loose-leaf, connected when using chain
When part 6 connects, the both ends of the chain connector 6 are fixed in the adjacent arc shrouds 4 of two panels by bolt 5 respectively.
Two joint faces for being used to be connected with adjacent arc shrouds 4 in every arc shrouds 4 are inclined plane, two connection
Face is respectively inclined plane 1, inclined plane 2 17, and two joint faces of every arc shrouds 4 can be used cooperatively, i.e. every arc sleeve
The inclined plane 2 17 of the inclined plane 1 of pipe 4 and adjacent arc shrouds 4 is connected.
All arc shrouds 4 are all connected on the shift mechanism for being placed on and piecing together in rear pipe, and the shift mechanism is by center
Bar 11, chain connector composition, one end of chain connector is fixed on the inwall of above-mentioned arc shrouds 4, the other end then passes through
Iron hoop 13 is fixed on the outer wall of center-pole 11, and the chain connector is divided into the N kinds that length sequence successively decreases：First chain, second
Chain ... N chains, and be linked in sequence between arc shrouds 4 and center-pole 11, that is, connect arc shrouds 4 and center-pole 11
Chain connector be respectively the first chain, the second chain ... N chains, the first chain, the second chain ... N chains.
Or：
All shift mechanisms are made up of center-pole 11, central tube 10, chain connector, and center-pole 11 is socketed in central tube 10,
In the downside of center-pole 11, welding is configured with raised line 14, is used cooperatively with the raised line 14, the downside of central tube 10 offers cunning
Road 15, the raised line 14 and slideway 15 and realizes being relatively fixed for following cover plates 3, and length and the arc shrouds 4 of the central tube 10 are grown
Spend it is identical, after the center sleeve is placed on the pipe after piecing together Nei, its top, bottom with piece together after pipe flush；Institute
The one end for stating chain connector is fixed on the inwall of above-mentioned arc shrouds 4, the other end is then fixed on central tube by iron hoop 13
On 10 outer wall, the chain connector is divided into the N kinds that length sequence successively decreases：First chain, the second chain ... N chains, and
It is linked in sequence between arc shrouds 4 and central tube 10, that is, connects arc shrouds 4 and the chain connector of central tube 10 is respectively
First chain, the second chain ... N chains, the first chain, the second chain ... N chains.
When shift mechanism is made up of center-pole 11, chain connector, the recess for placing center-pole 11 is offered on fagging 8
18；When shift mechanism is made up of center-pole 11, central tube 10, chain connector, is offered on fagging 8 and place center-pole 11
Recess 18.
The top of the center-pole 11 is configured with handgrip 1, and it is in " T " font that the handgrip 1 coordinates with center-pole 11；The center-pole
11 bottom is then configured with screw thread drill bit, and the pipe after piecing together is stretched out in top, the bottom of the center-pole 11.
It is described piece together after pipe at the top of be configured with circular cover 3, the cover plate 3 is socketed on center-pole 11 and passes through nut
2 fix, corresponding, and the top of center-pole 11 is provided with the screw thread being used cooperatively with nut 2, after cover plate 3 is fixed, its excircle
With piece together after pipe excircle flush.
Below by taking N=2 as an example, that is to say, that arc shrouds 4 in the present invention are provided with four, every arc shrouds 4
Corresponding to piece together a quarter of rear pipe, fagging 8 is configured with four extensions, the chain connector point of shift mechanism
Into different two kinds of length：First chain 7, the second chain 12.
The chain connector is iron chains, and the iron chains and above-mentioned iron hoop 13 are steel, arc shrouds 4 and bolt, nut 2
For zinc-plated component, remaining is ferrous material, and specific connection can use welding manner to realize.
The arc shrouds 4 of the central angles such as arc length such as it is for pintongs quarter circular arc sleeve pipe, the arc of each arc shrouds 4
Long edge angle is in 45 °.
For the iron chains and its fixing bolt between circular arc sleeve pipe, each each 15 ° of center of circle Angle Positions in circular arc sleeve pipe interface both sides,
Two fixing bolts are uniformly arranged up and down, using chain connector, i.e., are fixed compared with fine iron chain and fixing bolt, by each circular arc sleeve pipe
Connection.
It is in together for the first chain 7 for being connected between circular arc sleeve pipe and central tube 10, the connection end of the second chain 12
On one horizontal plane, fixing bolt is uniformly arranged up and down.The first chain 7 drawn in Fig. 2 is compared with the second chain 12 drawn in Fig. 3 slightly
It is long, and the excess length of the first chain 7 is the 1/3 of itself length, during reaching lifting fix bar, the in Fig. 2
One chain, 7 first stress, stress after the second chain 12 in Fig. 3, the purpose that the chain connector between circular arc sleeve pipe does not stress.
For central tube 10, the length of central tube 10 is highly equal with sleeve pipe, and can meet that center-pole 11 holds space, material
From 20 welded tubes.As shown in Fig. 2 the lower section both sides of central tube 10 are each to reserve the space that high 4cm arc chord angles are 90 °.
For iron hoop 13, the position of iron hoop 13 is identical with the fixing bolt horizontal level of arc shrouds 4, spacing by upper and lower two
Iron hoop 13 is limited to fixed horizontal plane by point, and the size of iron hoop 13 is big compared with the caliber of central tube 10 No. 1.
For fagging 8 and projection 9, projection 9 is located at the center of each vertical direction of arc shrouds 4, and 4 are supported point uniform minute
Cloth, as Figure 1-Figure 4, make fagging 8 can be with horizontal positioned, if Fig. 5 is the shape of fagging 8.When fagging 8 struts sleeve pipe, arc
Without obvious gap between shape sleeve pipe 4.
For center-pole 11, as shown in Figure 2 and Figure 3, the top sets a handgrip 1, is still further below one section of screw thread, is used for
Nut 2 limits cover plate 3, and lower section sets two restriction bars, and for lifting central tube 10, bottom is screw thread drill bit, is used for and mould
Plate is fixed.
For cover plate 3, the profile of cover plate 3 can compress cover plate 3 sleeve covers with nut 2, both having played prevents foreign matter from entering
The purpose of sleeve pipe, the purpose secured the cannula in template is played again.
Based on said structure, the present invention also provides a kind of application method of hole to be provided sleeve pipe, the specific implementation of the application method
Cheng Wei：
Drawing is consulted, according to beam or wall position, snap the line determines reserved opening center.
After determining reserved opening center, this placement is steady, and the screw thread drill bit below center-pole 11 is placed on reserved
On the center of hole.
Handgrip 1 is rotated, the screw thread drill bit of the lower section of center-pole 11 is pierced into template, will cover tube stay with fagging 8 after being fixedly secured
Open, sleeve pipe is placed on reserved opening opening position.
After sleeve pipe is placed by assigned position, square nut 2 on rotation cover 3, cover plate 3 is compressed downwards, sleeve pipe is completed to fix.
After concrete setting, loose nut 2, lift cover plate 3, fagging 8 is taken out.
Rotary hand grip 1, the screw thread drill bit of center-pole 11 is drilled out out of template.
Lift the handgrip 1 of center-pole 11, sleeve pipe is integrally proposed out of concrete hole.
By embodiment above, the those skilled in the art can readily realize the present invention.But should
Work as understanding, the present invention is not limited to above-mentioned embodiment.On the basis of disclosed embodiment, the technical field
Technical staff can be combined different technical characteristics, so as to realize different technical schemes.
It is the known technology of those skilled in the art in addition to the technical characteristic described in specification.
Claims (10)
- A kind of 1. hole to be provided sleeve pipe, it is characterised in that its structure include 2N pieces arc shrouds, fagging, fagging in hub-and-spoke configuration simultaneously 2N extension is configured with, each extension in a tubular form and corresponds to a piece of arc shrouds of support, matched somebody with somebody with the extension of the fagging Close what is used, be each equipped with inserting the projection of extension inner chamber, after the fagging is installed, institute on the inwall of every arc shrouds There are arc shrouds to scrabble up circular tube shaped, i.e. every arc shrouds are to piece together 2N/mono- of rear pipe, N here be >=1 from So number.
- 2. a kind of hole to be provided sleeve pipe according to claim 1, it is characterised in that per logical between the adjacent arc shrouds of two panels Cross chain connector or loose-leaf is flexibly connected, when using the connection of chain connector, the both ends of the chain connector pass through respectively It is bolted in the adjacent arc shrouds of two panels.
- 3. a kind of hole to be provided sleeve pipe according to claim 1 or 2, it is characterised in that be used for and phase in every arc shrouds Two joint faces that adjacent arc shrouds are connected are inclined plane, and two joint face is respectively inclined plane one, inclined plane two, every arc Two joint faces of shape sleeve pipe can be used cooperatively, i.e., the inclined plane one of every arc shrouds is matched somebody with somebody with the inclined plane two of adjacent arc shrouds Close connection.
- 4. a kind of hole to be provided sleeve pipe according to claim 1, it is characterised in that all arc shrouds, which are all connected to, to be placed on Piece together on the shift mechanism in rear pipe, the shift mechanism is made up of center-pole, chain connector, and one end of chain connector is consolidated It is scheduled on the inwall of above-mentioned arc shrouds, the other end is then fixed on the outer wall of center-pole by iron hoop, the chain connector point Into the N kinds of length decreasing order：First chain, the second chain ... N chains, and be linked in sequence in arc shrouds and center-pole Between, that is, the chain connector that connects arc shrouds and center-pole is respectively the first chain, the second chain ... N chains, the One chain, the second chain ... N chains.
- 5. a kind of hole to be provided sleeve pipe according to claim 4, it is characterised in that placement center-pole is offered on the fagging Recess.
- 6. a kind of hole to be provided sleeve pipe according to claim 1, it is characterised in that all arc shrouds, which are all connected to, to be placed on Piece together on the shift mechanism in rear pipe, the shift mechanism is made up of center-pole, central tube, chain connector, center-pole socket In central tube, in the downside of center-pole, welding is configured with raised line, is used cooperatively with the raised line, is offered on the downside of central tube Slideway, the length of the central tube is identical with arc shrouds length, and after the center sleeve is placed on the pipe after piecing together Nei, it is pushed up Portion, bottom with piece together after pipe flush；One end of the chain connector is fixed on the inwall of above-mentioned arc shrouds, The other end is then fixed on the outer wall of central tube by iron hoop, and the chain connector is divided into the N kinds that length sequence successively decreases：First chain Article, the second chain ... N chains, and be linked in sequence between arc shrouds and central tube, that is, connect arc shrouds and center The chain connector of pipe is respectively the first chain, the second chain ... N chains, the first chain, the second chain ... N chains Bar.
- 7. a kind of hole to be provided sleeve pipe according to claim 6, it is characterised in that placement center-pole is offered on the fagging Recess.
- 8. according to a kind of any described hole to be provided sleeve pipes of claim 4-7, it is characterised in that the top configuration of the center-pole There is handgrip, it is in " T " font that the handgrip coordinates with center-pole；The bottom of the center-pole is then configured with screw thread drill bit, the center-pole The pipe after piecing together is stretched out in top, bottom.
- A kind of 9. hole to be provided sleeve pipe according to claim 8, it is characterised in that it is described piece together after pipe at the top of be configured with Circular cover, the cover plate is socketed on center-pole and fixed by nut, corresponding, and the top of center-pole is provided with and nut The screw thread being used cooperatively, after cover plate is fixed, its excircle and the pipe excircle flush after piecing together.
- A kind of 10. application method of hole to be provided sleeve pipe, it is characterised in that based on reserved hole sleeve barrel described in the claims, its Specifically used process is：Drawing is consulted, according to beam or wall position, snap the line determines reserved opening center；Snap the line determines reserved opening center first；After determining reserved opening center, the pipe after piecing together is placed steadily, and the screw thread drill bit below center-pole is placed on On reserved opening center；Handgrip is rotated, the screw thread drill bit below center-pole is pierced into template, sleeve pipe is strutted with fagging after being fixedly secured, makes arc Sleeve pipe is placed on reserved opening opening position；After arc shrouds are placed by assigned position, square nut on rotation cover, cover plate is compressed downwards, arc shrouds are completed solid It is fixed；After concrete setting, loose nut, lift cover plate, fagging is taken out；Rotary hand grip, the screw thread drill bit of center-pole is drilled out out of template；Lift the handgrip of center-pole, sleeve pipe is integrally proposed out of concrete hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710601990.8A CN107338956A (en) | 2017-07-21 | 2017-07-21 | A kind of hole to be provided sleeve pipe and its application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710601990.8A CN107338956A (en) | 2017-07-21 | 2017-07-21 | A kind of hole to be provided sleeve pipe and its application method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107338956A true CN107338956A (en) | 2017-11-10 |
Family
ID=60216410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710601990.8A Pending CN107338956A (en) | 2017-07-21 | 2017-07-21 | A kind of hole to be provided sleeve pipe and its application method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107338956A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107939043A (en) * | 2017-11-20 | 2018-04-20 | 中铁四局集团第二工程有限公司 | Carry the accurate support pinner prepared hole die of positioning function |
| CN107965144A (en) * | 2017-12-07 | 2018-04-27 | 中国冶集团有限公司 | A kind of multi-functional reserved opening erecting device and mold method |
| CN114961227A (en) * | 2022-06-07 | 2022-08-30 | 中建八局第一建设有限公司 | Turnover type cantilever I-steel embedding device and implementation mode thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107939043A (en) * | 2017-11-20 | 2018-04-20 | 中铁四局集团第二工程有限公司 | Carry the accurate support pinner prepared hole die of positioning function |
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| CN114961227A (en) * | 2022-06-07 | 2022-08-30 | 中建八局第一建设有限公司 | Turnover type cantilever I-steel embedding device and implementation mode thereof |
| CN114961227B (en) * | 2022-06-07 | 2023-07-11 | 中建八局第一建设有限公司 | Turnover cantilever I-steel pre-embedding device and implementation mode thereof |
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Application publication date: 20171110 |