CN109440809A - A kind of Construction of Steel Structure pre-embedded bolt protective device - Google Patents
A kind of Construction of Steel Structure pre-embedded bolt protective device Download PDFInfo
- Publication number
- CN109440809A CN109440809A CN201811588287.9A CN201811588287A CN109440809A CN 109440809 A CN109440809 A CN 109440809A CN 201811588287 A CN201811588287 A CN 201811588287A CN 109440809 A CN109440809 A CN 109440809A
- Authority
- CN
- China
- Prior art keywords
- embedded bolt
- screw thread
- protective device
- construction
- plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
Abstract
The present invention relates to a kind of Construction of Steel Structure pre-embedded bolt protective devices, including built-in fitting and protective device, protective device is symmetrically arranged at left and right sides of the upper end of the built-in fitting, built-in fitting includes concrete base, template is equipped on the outside of concrete base upper end, pre-buried steelframe is equipped with inside template, the lower end of pre-buried steelframe is fixedly connected with the upper end of concrete base, the middle part of pre-buried steelframe is connected with pre-embedded bolt by reinforcing bar, the upper end of pre-embedded bolt side wall is equipped with securing plate, is connected with reinforced steel between the lower end of securing plate and pre-buried steelframe.When the present invention can solve steel construction suspension column casting concrete as the stability of pre-embedded bolt is poor, to lack protection wrong it is defeated caused by pre-embedded bolt deviate, the problems such as existing bracing means is complicated for operation, limitation is big and cannot reuse, the safeguard function to pre-embedded bolt may be implemented, have the advantages that stability is strong, easy to operate and reusable.
Description
Technical field
The present invention relates to field of steel structure, in particular to a kind of Construction of Steel Structure pre-embedded bolt protective device.
Background technique
In recent years, steel construction in engineering project with more and more common, it is good, strong with light weight, anti-seismic performance
The advantages that degree height, plasticity good toughness, speed of application is fast, in the work progress of steel construction, suspension column is the base of steel construction
Plinth, meanwhile, and it is easiest to the place to go wrong.
Under existing execution conditions, the construction of the suspension column of steel construction often occurs that pre-embedded bolt positioning is inaccurate, heel slab arbitrarily expands
The problems such as gap cannot effectively fill under hole, heel slab, wherein the reason of causing pre-embedded bolt deviation mainly has:
(1): measurement error, this error is generally in one two millimeters, within the scope of allowable error；
(2): pre-embedded bolt only relies on simple reinforced bar support after the completion of erection, and stability is poor；
(3): when suspension column casting concrete, since the impact force of concrete is larger, and pre-embedded bolt lack it is necessary anti-
Shield measure, so that pre-embedded bolt shifts；
Under existence conditions, a small number of devices that can be reinforced to pre-embedded bolt still remain problem:
(4): bracing means is complicated for operation and mostly welder, can not repeatedly be used；
(5): bracing means can only be fixed for a kind of pitch of bolts, when pre-embedded bolt spacing changes, fixed dress
It sets and is not just available, the limitation used is larger.
About the relevant issues of steel construction pre-embedded bolt, the country has some exploration and practices, and number of patent application is
201721270435.3 Chinese utility model patent disclose a kind of positioning rack of pre-buried ground bolt, for by foundation bolt
It is fixed on earth's surface, accurate positioning ensure that the accuracy of subsequent Construction of Steel Structure, improve the integral construction quality of steel construction；Specially
Application No. is 201320149069.1 Chinese utility model patents to disclose a kind of steel construction embedding anchor bolts strengthening frame for benefit,
It uses fashioned iron to be welded, and has enough intensity and rigidity, meets construction demand, guarantee in the construction process not because it is various not
Determine that bolt offset occurs for factor, such as construction machinery, vibrating head collided gudgeon.
Therefore, still it is necessary to which making a kind of device can solve problem as described above.
Summary of the invention
To solve the above-mentioned problems, it the present invention provides a kind of Construction of Steel Structure pre-embedded bolt protective device, can solve
Certainly steel construction suspension column casting concrete when as the stability of pre-embedded bolt is poor, to lack protection wrong it is defeated caused by pre-embedded bolt it is inclined
The problems such as shifting, existing bracing means is complicated for operation, limitation is big and cannot reuse, the protection to pre-embedded bolt may be implemented
Function has the advantages that stability is strong, easy to operate and reusable.
To achieve the goals above, the present invention uses following technical scheme, and a kind of Construction of Steel Structure is protected with pre-embedded bolt
The upper end left and right sides of device, including built-in fitting and protective device, the built-in fitting is symmetrically arranged with protective device.
The built-in fitting includes concrete base, and template is equipped on the outside of concrete base upper end, is equipped with inside template pre-
Steelframe is buried, the lower end of pre-buried steelframe is fixedly connected with the upper end of concrete base, and the middle part of pre-buried steelframe is connected with by reinforcing bar
Pre-embedded bolt, the upper end of pre-embedded bolt side wall are equipped with securing plate, reinforcing are connected between the lower end of securing plate and pre-buried steelframe
Reinforcing bar.
The protective device includes fixed mechanism, and the threaded upper ends of securing plate are connected with fixed mechanism, fixed mechanism
The right end of left end and supporting mechanism is hinged, and the left end of supporting mechanism and the right end of clamp system are hinged, and clamp system is fixed on pre-
The upper end of embedded part.
Preferably, the fixed mechanism includes fixed bottom plate, and the middle part of fixed bottom plate is equipped with fixing groove, a left side for fixing groove
Right side wall is equipped with sliding slot, and sliding block is connected with by way of being slidably matched in sliding slot, is equipped with lantern ring between sliding block, lantern ring it is upper
End is equipped with screw thread disk by lower bearing, and the upper end of screw thread disk is connected with protective jacket, lantern ring, screw thread disk, upper axis by upper bearing (metal)
Hold, lower bearing it is identical as the diameter of protective jacket, and the inner sidewall of screw thread disk be equipped with thread groove, the screw thread of thread groove and pre-embedded bolt
It matches, when work, fixed mechanism can either be fixed pre-embedded bolt and can protect the screw thread of pre-embedded bolt.
Preferably, the clamp system includes clamping bottom plate, and the right end for clamping bottom plate is connected by the lower end with screw rod
It connects, the front and rear sides for clamping bottom plate are symmetrically arranged with clamping branch.
Preferably, the clamping branch includes support shaft, is connected with hinge eyes by bearing on the side wall of support shaft, is cut with scissors
It connects and is symmetrically equipped with clamping plate on the side wall of ring, fastening seat is equipped on the inside of clamping plate upper end.
Preferably, the clamping plate is made of left clamp and right clamping plate, and clamping plate is in scissor construction, under clamping plate
End inside is equipped with connecting plate, is equipped with clamping tooth on connecting plate.
Preferably, the fastening seat includes ball screw thread, and the upper end of clamping plate is equipped with circular hole, is hinged with screw thread in circular hole
Ball, ball screw thread are internally threaded hole, and threaded hole internal screw thread is connected with anchorage bar, is equipped with fastening plate in the middle part of anchorage bar side wall,
When work, clamp system can be fixed in template, provide support force for the fixation of pre-embedded bolt.
Preferably, the supporting mechanism includes support rod, and the left and right ends of support rod are equipped with through-hole, the left and right of support rod
Two sides are equipped with adjustment disk by bearing, and adjustment disk internal screw thread is connected with screw rod, and the top and bottom of screw rod pass through hinged ball
It is connected respectively at the left end of fixed bottom plate with the right end of clamp system, when work, supporting mechanism can play fixed mechanism
The effect of support, it can pre-embedded bolt is supported.
The beneficial effects of the present invention are:
One, the present invention is provided with fixed mechanism, and fixed mechanism can also be to its screw thread while fixed to pre-embedded bolt
It is protected；
Two, the present invention is provided with supporting mechanism, and supporting mechanism can be supported pre-embedded bolt, strengthens pre-embedded bolt
Stability；
Three, the present invention is provided with clamp system, and clamp system is fixed in template, is pre-buried spiral shell compared with pre-buried steelframe
The stability that bolt provides is more preferable；
Four, protective device of the invention installation and removal are simple and convenient, can be repeated as many times and utilize.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the structural schematic diagram between template of the invention, pre-embedded bolt, securing plate and protective device.
Specific embodiment
Below with reference to the accompanying drawings the embodiment of the present invention is illustrated.In the process, for ensure illustrate definition and
Convenience, we may the width to lines in diagram or constituent element the mark exaggerated of size.
In addition, term hereinafter is defined based on the function in the present invention, it can be according to the intention of user, fortune user
Or convention and difference.Therefore, these terms are defined based on the full content of this specification.
As shown in Figure 1 to Figure 2, a kind of Construction of Steel Structure pre-embedded bolt protective device, including built-in fitting 1 and protective device
2, the upper end left and right sides of the built-in fitting 1 is symmetrically arranged with protective device 2.
The built-in fitting 1 includes concrete base 11, is equipped with template 12 on the outside of 11 upper end of concrete base, in template 12
Portion is equipped with pre-buried steelframe 13, and the lower end of pre-buried steelframe 13 is fixedly connected with the upper end of concrete base 11, in pre-buried steelframe 13
Portion is connected with pre-embedded bolt 14 by reinforcing bar, and the upper end of 14 side wall of pre-embedded bolt is equipped with securing plate 15, the lower end of securing plate 15
Reinforced steel 16 is connected between pre-buried steelframe 13.
The protective device 2 includes fixed mechanism 21, and the threaded upper ends of securing plate 15 are connected with fixed mechanism 21, fixed
The left end of mechanism 21 and the right end of supporting mechanism 22 are hinged, and the left end of supporting mechanism 22 and the right end of clamp system 23 are hinged, folder
Tight mechanism 23 is fixed on the upper end of built-in fitting 1.
The fixed mechanism 21 includes fixed bottom plate 211, and the middle part of fixed bottom plate 211 is equipped with fixing groove, fixing groove
Left and right sidewall is equipped with sliding slot, is connected with sliding block 212 by way of being slidably matched in sliding slot, is equipped with lantern ring between sliding block 212
213, the upper end of lantern ring 213 is equipped with screw thread disk 215 by lower bearing 214, and the upper end of screw thread disk 215 is connected by upper bearing (metal) 216
It is connected to protective jacket 217, lantern ring 213, screw thread disk 215, upper bearing (metal) 216, lower bearing 214 are identical as the diameter of protective jacket 217, and spiral shell
The inner sidewall of line disk 215 is equipped with thread groove, and thread groove matches with the screw thread of pre-embedded bolt 14, when work, the general of sliding slider 212
213 sets of lantern ring are connected on pre-embedded bolt 14, and rotation screw thread disk 215 is threadedly coupled screw thread disk 215 with pre-embedded bolt 14, together
When, fixed mechanism 21 moves down, and is moved to and is bonded with securing plate 15, and protective jacket 217 plays the work of protection to pre-embedded bolt 14
With to can either be fixed and can protect the screw thread of pre-embedded bolt 14 to pre-embedded bolt 14.
The clamp system 23 includes clamping bottom plate 231, and the right end for clamping bottom plate 231 passes through the lower end with screw rod 223
It is connected, the front and rear sides for clamping bottom plate 231, which are symmetrically arranged with, clamps branch 24.
The clamping branch 24 includes support shaft 241, is connected with hinge eyes by bearing on the side wall of support shaft 241
242, it is symmetrically equipped with clamping plate 25 on the side wall of hinge eyes 242, fastening seat 26 is equipped on the inside of 25 upper end of clamping plate.
The clamping plate 25 is made of left clamp and right clamping plate, and clamping plate 25 is in scissor construction, under clamping plate 25
End inside is equipped with connecting plate 251, and clamping tooth 252 is equipped on connecting plate 251.
The fastening seat 26 includes ball screw thread 261, and the upper end of clamping plate 25 is equipped with circular hole, is hinged with ball screw thread in circular hole
261, ball screw thread 261 is internally threaded hole, and threaded hole internal screw thread is connected with anchorage bar 262, installation in the middle part of 262 side wall of anchorage bar
There is a fastening plate 263, when work, clamp system 23 is placed into template 12, fastening plate 263, ball screw thread 261 and clamping plate are rotated
25 rotation connections, thus anchorage bar 262 can inwardly or outwardly move clamping plate 25 simultaneously, under the action of hinge eyes 242,
Clamping tooth 252 snaps fit onto template 12, so that clamp system 23 can be fixed in template 12, mentions for the fixation of pre-embedded bolt 14
For support force.
The supporting mechanism 22 includes support rod 221, and the left and right ends of support rod 221 are equipped with through-hole, support rod 221
Left and right sides are equipped with adjustment disk 222 by bearing, and 222 internal screw thread of adjustment disk is connected with screw rod 223, the upper end of screw rod 223
It is connected respectively at the left end of fixed bottom plate 211 with the right end of clamp system 23 with lower end by hinged ball 224, when work, root
According to clamp system 23 at a distance from fixed mechanism 21, adjustment disk 222 is rotated, supporting mechanism 22 is adjusted and arrives suitable length, from
And supporting mechanism 22 can play the role of support to fixed mechanism 21, it can be supported to pre-embedded bolt 14.
Prepare before fixed mechanism 21 is fixed: 213 sets of lantern ring are connected on pre-embedded bolt 14 by sliding slider 212；
The fixation of fixed mechanism 21: rotation screw thread disk 215 is threadedly coupled screw thread disk 215 with pre-embedded bolt 14, meanwhile,
Fixed mechanism 21 moves down, and is moved to and is bonded with securing plate 15, and protective jacket 217 plays the role of protection to pre-embedded bolt 14；
The fixation of clamp system 23: clamp system 23 is placed into template 12, rotate fastening plate 263, ball screw thread 261 with
Clamping plate 25 is rotatablely connected, thus anchorage bar 262 can inwardly or outwardly move clamping plate 25 simultaneously, in hinge eyes 242
Under effect, clamping tooth 252 is snapped fit onto template 12, so that clamp system 23 can be fixed in template 12；
The adjusting of supporting mechanism 22: according to clamp system 23 at a distance from fixed mechanism 21, adjustment disk 222 is rotated, will be propped up
Support mechanism 22, which is adjusted, arrives suitable length, so that supporting mechanism 22 can play the role of support to fixed mechanism 21.
Workflow in summary realizes the safeguard function to pre-embedded bolt 14, solve steel construction suspension column pour it is mixed
When solidifying soil as the stability of pre-embedded bolt 14 is poor, to lack protection wrong it is defeated caused by the offset of pre-embedded bolt 14, existing bracing means
The problems such as complicated for operation, limitation is big and cannot reuse, has reached purpose.
The embodiment that the present invention only refers to drawing illustration is illustrated, it is believed that has related fields basic
The personnel of knowledge can carry out the other embodiments of diversified deformation and peer-level based on this.
Claims (6)
1. a kind of Construction of Steel Structure pre-embedded bolt protective device, including built-in fitting (1) and protective device (2), it is characterised in that:
Protective device (2) are symmetrically arranged at left and right sides of the upper end of the built-in fitting (1)；Wherein:
The protective device (2) includes fixed mechanism (21), and the threaded upper ends of securing plate are connected with fixed mechanism (21), fixed
The left end of mechanism (21) and the right end of supporting mechanism (22) are hinged, the left end of supporting mechanism (22) and the right end of clamp system (23)
Hingedly, clamp system (23) is fixed on the upper end of built-in fitting (1)；
The fixed mechanism (21) includes fixed bottom plate (211), and the middle part of fixed bottom plate (211) is equipped with fixing groove, fixing groove
Left and right sidewall be equipped with sliding slot, is connected with by way of being slidably matched sliding block (212) in sliding slot, sliding block is installed between (212)
Have lantern ring (213), the upper end of lantern ring (213) is equipped with screw thread disk (215) by lower bearing (214), the upper end of screw thread disk (215)
Protective jacket (217) are connected with by upper bearing (metal) (216)；
The clamp system (23) includes clamping bottom plate (231), and the right end for clamping bottom plate (231) passes through the lower end phase with screw rod
Connection, the front and rear sides for clamping bottom plate (231), which are symmetrically arranged with, clamps branch (24)；
The clamping branch (24) includes support shaft (241), is connected with hinge eyes by bearing on the side wall of support shaft (241)
(242), clamping plate (25) symmetrically are equipped on the side wall of hinge eyes (242), fastening seat is equipped on the inside of clamping plate (25) upper end
(26)。
2. a kind of Construction of Steel Structure pre-embedded bolt protective device according to claim 1, it is characterised in that: described is pre-
Embedded part (1) includes concrete base (11), is equipped with template (12) on the outside of concrete base (11) upper end, is equipped with inside template (12)
The lower end of pre-buried steelframe (13), pre-buried steelframe (13) is fixedly connected with the upper end of concrete base (11), pre-buried steelframe (13)
Middle part is connected with pre-embedded bolt (14) by reinforcing bar, and the upper end of pre-embedded bolt (14) side wall is equipped with securing plate (15), securing plate
(15) reinforced steel (16) are connected between lower end and pre-buried steelframe (13).
3. a kind of Construction of Steel Structure pre-embedded bolt protective device according to claim 1, it is characterised in that: the branch
Support mechanism (22) includes support rod (221), and the left and right ends of support rod (221) are equipped with through-hole, the left and right sides of support rod (221)
Face is equipped with adjustment disk (222) by bearing, and adjustment disk (222) internal screw thread is connected with screw rod (223), the upper end of screw rod (223)
It is connected respectively at the left end of fixed bottom plate (211) with the right end of clamp system (23) with lower end by hinged ball (224).
4. a kind of Construction of Steel Structure pre-embedded bolt protective device according to claim 1, it is characterised in that: the folder
Tight plate (25) is made of left clamp and right clamping plate, and clamping plate (25) is in scissor construction, and the lower end inside of clamping plate (25) is installed
Have connecting plate (251), clamping tooth (252) are installed on connecting plate (251).
5. a kind of Construction of Steel Structure pre-embedded bolt protective device according to claim 1, it is characterised in that: described is tight
Gu seat (26) includes ball screw thread (261), the upper end of clamping plate (25) is equipped with circular hole, is hinged with ball screw thread (261), screw thread in circular hole
Ball (261) is internally threaded hole, and threaded hole internal screw thread is connected with anchorage bar (262), is equipped in the middle part of anchorage bar (262) side wall
Fastening plate (263).
6. a kind of Construction of Steel Structure pre-embedded bolt protective device according to claim 1, it is characterised in that: the set
Ring (213), screw thread disk (215), upper bearing (metal) (216), lower bearing (214) are identical as the diameter of protective jacket (217), and screw thread disk
(215) inner sidewall is equipped with thread groove, and thread groove matches with the screw thread of pre-embedded bolt (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811588287.9A CN109440809A (en) | 2018-12-25 | 2018-12-25 | A kind of Construction of Steel Structure pre-embedded bolt protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811588287.9A CN109440809A (en) | 2018-12-25 | 2018-12-25 | A kind of Construction of Steel Structure pre-embedded bolt protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109440809A true CN109440809A (en) | 2019-03-08 |
Family
ID=65535432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811588287.9A Pending CN109440809A (en) | 2018-12-25 | 2018-12-25 | A kind of Construction of Steel Structure pre-embedded bolt protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109440809A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114150773A (en) * | 2021-11-19 | 2022-03-08 | 河南五建城乡建设发展有限公司 | Concrete built-in fitting reinforced structure |
| CN114607158A (en) * | 2022-03-22 | 2022-06-10 | 中国建筑第五工程局有限公司 | Pre-buried bolt protector is used in construction of steel construction roofing |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59179937A (en) * | 1983-03-31 | 1984-10-12 | Isamu Kubota | Placement of anchor bolt |
| CN201369519Y (en) * | 2009-03-19 | 2009-12-23 | 安徽送变电工程公司 | Adjustable anchor bolt fixing support for transmission line foundation |
| CN102518145A (en) * | 2011-12-26 | 2012-06-27 | 中国十七冶集团有限公司 | Device for wholly positioning and strengthening groups of embedded bolts in ranks on device foundations |
| CN203918325U (en) * | 2014-06-25 | 2014-11-05 | 广东吉达铁塔科技有限公司 | A kind of foundation bolt assembly welding mould |
| CN104290058A (en) * | 2014-10-11 | 2015-01-21 | 重庆大江动力设备制造有限公司 | Shear type clamping device |
| CN204225145U (en) * | 2014-10-20 | 2015-03-25 | 中国建筑第六工程局有限公司 | A kind of simple and easy orientation tool for basic embedding anchor bolts |
| CN204456923U (en) * | 2015-01-15 | 2015-07-08 | 四川庞源机械工程有限公司 | Pre-embedded bolt location and installation assembly |
| CN206436235U (en) * | 2016-12-21 | 2017-08-25 | 山东飞越钢结构工程有限公司 | A kind of sheet material gripping manipulator |
| CN207776464U (en) * | 2018-01-19 | 2018-08-28 | 中建筑港集团有限公司 | A kind of pre-embedded bolt auxiliary fixing device |
-
2018
- 2018-12-25 CN CN201811588287.9A patent/CN109440809A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59179937A (en) * | 1983-03-31 | 1984-10-12 | Isamu Kubota | Placement of anchor bolt |
| CN201369519Y (en) * | 2009-03-19 | 2009-12-23 | 安徽送变电工程公司 | Adjustable anchor bolt fixing support for transmission line foundation |
| CN102518145A (en) * | 2011-12-26 | 2012-06-27 | 中国十七冶集团有限公司 | Device for wholly positioning and strengthening groups of embedded bolts in ranks on device foundations |
| CN203918325U (en) * | 2014-06-25 | 2014-11-05 | 广东吉达铁塔科技有限公司 | A kind of foundation bolt assembly welding mould |
| CN104290058A (en) * | 2014-10-11 | 2015-01-21 | 重庆大江动力设备制造有限公司 | Shear type clamping device |
| CN204225145U (en) * | 2014-10-20 | 2015-03-25 | 中国建筑第六工程局有限公司 | A kind of simple and easy orientation tool for basic embedding anchor bolts |
| CN204456923U (en) * | 2015-01-15 | 2015-07-08 | 四川庞源机械工程有限公司 | Pre-embedded bolt location and installation assembly |
| CN206436235U (en) * | 2016-12-21 | 2017-08-25 | 山东飞越钢结构工程有限公司 | A kind of sheet material gripping manipulator |
| CN207776464U (en) * | 2018-01-19 | 2018-08-28 | 中建筑港集团有限公司 | A kind of pre-embedded bolt auxiliary fixing device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114150773A (en) * | 2021-11-19 | 2022-03-08 | 河南五建城乡建设发展有限公司 | Concrete built-in fitting reinforced structure |
| CN114150773B (en) * | 2021-11-19 | 2023-02-10 | 河南五建城乡建设发展有限公司 | Concrete built-in fitting reinforced structure |
| CN114607158A (en) * | 2022-03-22 | 2022-06-10 | 中国建筑第五工程局有限公司 | Pre-buried bolt protector is used in construction of steel construction roofing |
| CN114607158B (en) * | 2022-03-22 | 2023-09-26 | 中国建筑第五工程局有限公司 | Pre-buried bolt protector is used in steel construction roofing construction |
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Application publication date: 20190308 |
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