CN221066680U - Assembled heat preservation template for concrete precast box girder - Google Patents
Assembled heat preservation template for concrete precast box girder Download PDFInfo
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- CN221066680U CN221066680U CN202322292715.6U CN202322292715U CN221066680U CN 221066680 U CN221066680 U CN 221066680U CN 202322292715 U CN202322292715 U CN 202322292715U CN 221066680 U CN221066680 U CN 221066680U
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- 238000004321 preservation Methods 0.000 title claims abstract description 59
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- 229910000831 Steel Inorganic materials 0.000 claims description 76
- 239000010959 steel Substances 0.000 claims description 76
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 69
- 239000010410 layer Substances 0.000 claims description 41
- 238000009413 insulation Methods 0.000 claims description 36
- 239000011248 coating agent Substances 0.000 claims description 30
- 238000000576 coating method Methods 0.000 claims description 30
- 239000004570 mortar (masonry) Substances 0.000 claims description 18
- 239000011241 protective layer Substances 0.000 claims description 12
- 239000000853 adhesive Substances 0.000 claims description 8
- 230000001070 adhesive effect Effects 0.000 claims description 8
- 230000002209 hydrophobic effect Effects 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 4
- 239000011178 precast concrete Substances 0.000 claims description 3
- 238000009415 formwork Methods 0.000 claims 7
- 238000010276 construction Methods 0.000 abstract description 24
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical class [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 17
- 239000000463 material Substances 0.000 description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 14
- 238000000034 method Methods 0.000 description 12
- 230000036571 hydration Effects 0.000 description 7
- 238000006703 hydration reaction Methods 0.000 description 7
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- 239000004965 Silica aerogel Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 5
- 238000005253 cladding Methods 0.000 description 4
- 239000012774 insulation material Substances 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000012779 reinforcing material Substances 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
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- 239000004793 Polystyrene Substances 0.000 description 2
- 229920005830 Polyurethane Foam Polymers 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 238000001723 curing Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
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- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011325 microbead Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
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- Building Environments (AREA)
Abstract
The utility model relates to the technical field of precast box girder construction, and discloses an assembled heat preservation template for a concrete precast box girder.
Description
Technical Field
The utility model relates to the technical field of precast box girder construction, in particular to an assembled heat-preservation template for a concrete precast box girder.
Background
With the continuous development of the bridge industry scale, in order to provide stable power for economic development, more and more bridge engineering is involved in construction. Under the development trend of the increasing number of projects, more and more construction units choose to construct in winter so as to deliver projects on time. The choice of construction in winter can naturally meet the requirements of the construction unit for the construction period, but also has stricter standards for specific operations in construction. In the winter construction process of the precast box girder, the cement hydration rate is reduced, the concrete strength is slowly developed, and the turnover rate of the mould is reduced due to lower air temperature. According to the current specification, if the construction process that the outdoor daily average air temperature is stably lower than 5 ℃ or the lowest temperature is lower than 0 ℃ for 5 days is called winter construction, in the winter construction process, the most important is to pay attention to heat preservation and maintenance work after concrete is poured, the surface temperature of the concrete is required to be kept to be more than or equal to 3 ℃, otherwise, the strength is also slowly increased. For winter construction, field measures of internal heating and external heat preservation are generally adopted.
At present, the traditional precast beam is generally maintained naturally, the strength of the precast beam body is gradually improved by manual sprinkling and proper heat preservation measures in production, and the precast beam is controlled to crack, but the method has the advantages of large occupied area, low production efficiency and high labor intensity, and the quality of the precast beam cannot be well controlled. The polyurethane thermal insulation material is directly sprayed on the outer side of the steel template to play a certain thermal insulation role, but the material can increase the self bonding strength when the ambient temperature is increased, so that the material is particularly troublesome when being removed from the template, the appearance and the subsequent use of the template are affected, and when the spraying construction is adopted, the environment is polluted, the construction is inconvenient, and when the environmental temperature is too low, the working performance of the polyurethane foam material is greatly affected.
Inorganic heat-insulating materials such as rock wool, glass wool, slag wool and the like which are popular in the market at present have large fiber pores, are extremely easy to absorb moisture to cause generation of mould, and are easy to cause reduction of heat-insulating performance after long-term use. Organic insulating materials such as polystyrene and polyurethane foam, etc., can generate harmful gases to the health of the human body. Therefore, a novel heat preservation measure is adopted as an effective way for improving the production quality of the precast beam
Disclosure of utility model
In order to overcome the defects in the prior art, the utility model aims to provide an assembled heat-insulating template for a concrete precast box girder, so as to solve the technical problem of poor heat insulation of the precast box girder in the prior art.
The utility model is realized by the following technical scheme:
An assembled heat preservation template for a concrete precast box girder comprises a box girder steel template assembly, a precast box girder and a protection heat preservation unit; the prefabricated box girder is arranged in the box girder steel template assembly, and the protection and heat preservation unit is coated on the outer side of the box girder steel template assembly.
Preferably, the box girder steel template assembly comprises a box girder steel template outer mold and a box girder steel template inner mold, wherein the box girder steel template inner mold is arranged inside the prefabricated box girder, the box girder steel template outer mold is arranged outside the prefabricated box girder, and the protection heat preservation unit is coated outside the box girder steel template outer mold.
Further, the protection heat preservation unit comprises a protection layer and a heat preservation layer, wherein the heat preservation layer is coated on the outer part of the steel template outer mold of the box girder, and the protection layer is coated on the outer part of the heat preservation layer.
Furthermore, the heat preservation layer is SiO 2 aerogel heat-insulating plate, and the SiO 2 aerogel heat-insulating plate is coated and arranged outside the outer die of the steel template of the box girder.
Furthermore, an adhesive is further arranged between the SiO 2 aerogel heat-insulating plate and the outer die of the steel die plate of the box girder, and the SiO 2 aerogel heat-insulating plate is coated and arranged outside the outer die of the steel die plate of the box girder through the adhesive.
Further, the protective layer is a hydrophobic modified SiO 2 aerogel coating, and the hydrophobic modified SiO 2 aerogel coating is coated outside the heat insulation layer.
Furthermore, a layer of SiO 2 aerogel mortar is coated between the hydrophobically modified SiO 2 aerogel coating and the heat insulation layer, and the hydrophobically modified SiO 2 aerogel coating is coated outside the heat insulation layer through the SiO 2 aerogel mortar.
Furthermore, the protective layer can also be SiO 2 aerogel heat-insulating felt.
Preferably, the prefabricated box girder template further comprises a plurality of box girder steel template pedestals, and the plurality of box girder steel template pedestals are arranged at the bottom of the box girder steel template assembly through a protection heat preservation unit.
Furthermore, the heights of the box girder steel template pedestals are the same.
Compared with the prior art, the utility model has the following beneficial technical effects:
The utility model provides an assembled heat preservation template for a concrete precast box girder, which is characterized in that the precast box girder is arranged in a box girder steel template assembly, and a protective heat preservation unit is coated on the outer side of the box girder steel template assembly, so that hydration heat of concrete per se can be fully utilized in a low-temperature environment, rapid precast of the concrete box girder in winter can be realized, the occupied area is small, the energy consumption is low, the heat preservation performance of the precast box girder is effectively improved, the precast box girder can be preserved and maintained by utilizing the hydration heat of the concrete per se, and negative surface shadow of the precast box girder by the outer side low temperature can be fully reduced, so that heat preservation and maintenance are carried out.
Further, the box girder steel template assembly comprises a box girder steel template outer mold and a box girder steel template inner mold, the box girder steel template inner mold is arranged inside the prefabricated box girder, the box girder steel template outer mold is arranged outside the prefabricated box girder, the prefabricated box girder is convenient to prefabricate rapidly, the protective heat preservation unit is coated outside the box girder steel template outer mold, and the heat preservation of the prefabricated box girder is improved.
Further, the protection heat preservation unit comprises a protection layer and a heat preservation layer, the heat preservation layer is coated on the outer portion of the steel template outer die of the box girder, the protection layer is coated on the outer portion of the heat preservation layer, and the protection and heat preservation of the prefabricated box girder are improved.
Further, the heat preservation is SiO 2 aerogel heat-insulating board, siO 2 aerogel heat-insulating board 8 cladding sets up in the outside of case roof beam steel form external mold, still is equipped with the binder between SiO 2 aerogel heat-insulating board and the case roof beam steel form external mold, and SiO 2 aerogel heat-insulating board 8 passes through the binder cladding to be set up in the outside of case roof beam steel form external mold 3, and SiO 2 aerogel material has the super high thermal insulation performance, adopts fibre as reinforcing material and its compound preparation fibre composite material, has compensatied SiO 2 aerogel material intensity low, fragile shortcoming, and its mechanical properties has great improvement.
Further, the protective layer is a hydrophobic modified SiO 2 aerogel coating, the hydrophobic modified SiO 2 aerogel coating is coated outside the heat-insulating layer, a layer of SiO 2 aerogel mortar is further coated between the hydrophobic modified SiO 2 aerogel coating and the heat-insulating layer, the hydrophobic modified SiO 2 aerogel coating is coated outside the heat-insulating layer through the SiO 2 aerogel mortar, and the novel heat-insulating mortar is prepared by mixing the aerogel and the vitrified microbeads.
Drawings
FIG. 1 is a schematic diagram of an assembled heat preservation template main body structure for a concrete precast box girder;
FIG. 2 is a block diagram of the outside thermal insulation measure of the steel form of the box girder in the present utility model
In the figure: 1-a protective layer; 2-an insulating layer; 3-an outer mold of the steel template of the box girder; 4-prefabricating a box girder; 5-inner mold of steel template of box girder; 6-a steel template pedestal of the box girder; 7-an adhesive; 8-SiO 2 aerogel thermal insulation board; 9-SiO 2 aerogel mortar; 10-hydrophobically modified SiO 2 aerogel coating.
Detailed Description
In order to better understand the solution of the utility model for the person skilled in the art; the drawings in the embodiments of the present utility model will be combined; the technical scheme in the embodiment of the utility model is clearly and completely described; obviously; the described embodiments are only examples of part of the utility model; but not all embodiments. Based on the embodiments in the present utility model; all other embodiments obtained by those skilled in the art without undue burden; are intended to fall within the scope of the present utility model.
It should be noted that; the terms first, second and the like in the description and in the claims of the utility model and in the above-described figures are used for distinguishing between similar objects; and not necessarily to describe a particular order or sequence. It should be understood that the data so used may be interchanged where appropriate; so that embodiments of the utility model described herein may be practiced otherwise than as specifically illustrated and described herein. Furthermore, it is provided that; the terms "comprising," "including," and "having," and any variations thereof; it is intended to cover a non-exclusive inclusion; for example; a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements explicitly listed; but may include other steps or elements not expressly listed or inherent to such process, method, article of manufacture, or apparatus.
The utility model is described in further detail below with reference to the attached drawing figures:
The utility model aims to provide an assembled heat-preserving template for a concrete precast box girder, which aims to solve the technical problem of poor heat preservation of the precast box girder in the prior art.
See fig. 1; the utility model provides an assembled heat-preserving template for a concrete precast box girder, which comprises a box girder steel template assembly, a precast box girder 4 and a protection heat-preserving unit; the prefabricated box girder 4 is arranged in the box girder steel template assembly, and the protection and heat preservation unit is coated on the outer side of the box girder steel template assembly.
Specifically, the box girder steel template assembly comprises a box girder steel template outer mold 3 and a box girder steel template inner mold 5, wherein the box girder steel template inner mold 5 is arranged inside a prefabricated box girder 4, the box girder steel template outer mold 3 is arranged outside the prefabricated box girder 4, and the protection heat preservation unit is coated outside the box girder steel template outer mold 3.
Specifically, according to the illustration in fig. 2, the protection and heat preservation unit includes inoxidizing coating 1 and heat preservation 2, heat preservation 2 cladding is in the outside of case beam steel form external mold 3, inoxidizing coating 1 cladding sets up in the outside of heat preservation 2.
According to the illustration in fig. 2, the heat-insulating layer 2 is a SiO 2 aerogel heat-insulating plate 8, and the SiO 2 aerogel heat-insulating plate 8 is coated and arranged outside the box girder steel template outer mold 3.
The SiO 2 aerogel heat-insulating plate 8 and the box girder steel template outer mold 3 are also provided with an adhesive 7, and the SiO 2 aerogel heat-insulating plate 8 is coated and arranged outside the box girder steel template outer mold 3 through the adhesive 7.
Specifically, according to fig. 2, the protective layer 1 is a hydrophobically modified SiO 2 aerogel coating 10, and the hydrophobically modified SiO 2 aerogel coating 10 is coated on the outside of the heat insulation layer 2.
Specifically, a layer of SiO 2 aerogel mortar 9 is further coated between the hydrophobically modified SiO 2 aerogel coating 10 and the heat insulation layer 2, and the hydrophobically modified SiO 2 aerogel coating 10 is coated outside the heat insulation layer 2 through the SiO 2 aerogel mortar 9.
The protective layer 1 in the utility model can also be SiO 2 aerogel heat insulation felt.
Specifically, prefabricated case roof beam template still includes a plurality of case roof beam steel form pedestal 6, and a plurality of case roof beam steel form pedestal 6 pass through the protection heat preservation unit setting in the bottom of case roof beam steel form subassembly, and the height of a plurality of case roof beam steel form pedestal 6 is the same.
The heat insulation material silicon oxide aerogel used in the utility model can be used within the temperature range of-200 ℃ to 1000 ℃, has very good applicability to heat insulation under extreme conditions, adopts SiO 2 aerogel heat insulation coating on the heat insulation of the template from the aspects of energy conservation and environmental protection, has excellent heat insulation performance, high temperature resistance and convenient construction, is directly coated on a wall body, reduces a plurality of construction procedures, has incombustibility, and has healthy and environmental protection production process flow.
Example 1
The embodiment provides a concrete precast box girder heat preservation template, which consists of a steel template, siO 2 aerogel heat insulation plates, siO 2 aerogel mortar, siO 2 heat insulation felt and a binder, wherein the SiO 2 aerogel heat insulation plates are placed on the outer side of the precast box girder steel template, the heat insulation plates are cut into proper sizes according to the appearance of the steel template, the heat insulation plates are adhered to the template by the binder, a layer of SiO 2 aerogel mortar is coated, and after the strength is formed, a SiO 2 aerogel coating with the thickness of about 1mm is coated on the outermost side.
In the embodiment, siO 2 aerogel is used as a heat insulation material; the SiO 2 aerogel thermal insulation board adopts the SiO 2 aerogel fiber composite material, the SiO 2 aerogel material has ultrahigh heat insulation performance, and the fiber is adopted as the reinforcing material to be compounded with the reinforcing material to prepare the fiber composite material, so that the defects of low strength and fragility of the SiO 2 aerogel material are overcome, and the mechanical property of the SiO 2 aerogel thermal insulation board is greatly improved.
The SiO 2 aerogel mortar adopted in the embodiment is characterized by being novel thermal insulation mortar prepared by mixing aerogel and vitrified micro bubbles.
The SiO 2 aerogel coating is a heat-insulating coating prepared by adding SiO 2 aerogel powder as a filler into the coating according to a certain proportion.
According to the embodiment, the SiO 2 aerogel heat-insulating material with ultrahigh heat-insulating performance is adopted, so that the heat released by hydration of concrete can be fully utilized, the curing methods such as steam heat-insulating shed curing and the like which are generally adopted in concrete winter construction are replaced, the site area requirements and the caused environmental resource waste are greatly reduced, the formation of concrete strength in a low-temperature environment is promoted, and the problem of concrete construction quality caused by low temperature is avoided.
The general structure of the template in the utility model is that an insulating layer and a protective layer mainly made of SiO 2 aerogel materials are adhered on the outer film of a prefabricated box girder steel template. The heat preservation layer 2 mainly comprises a material SiO 2 aerogel heat-insulating plate 8, and is connected with the box girder steel template outer mold 3 through an adhesive 7, so that the prefabricated box girder is subjected to health preservation and heat preservation. The protective layer 1 mainly comprises materials of SiO 2 aerogel mortar 9 and a hydrophobically modified SiO 2 aerogel coating 10, not only can protect the heat insulation layer, but also can play a certain role in heat insulation, a layer of SiO2 aerogel mortar 9 is uniformly brushed on the outer layer of the SiO 2 aerogel heat insulation plate 8, and then a layer of hydrophobically modified SiO 2 aerogel coating 10 is brushed.
The hydrophobically modified SiO 2 aerogel coating can be replaced by a hydrophobically modified SiO 2 aerogel heat insulation felt, the material is more on the market at present, the heat insulation effect is better, and the material has good heat insulation effect and waterproof and fireproof effects.
The assembled heat-insulating template for the concrete precast box girder can fully utilize self hydration heat of concrete in a low-temperature environment, can realize rapid precast of the concrete box girder in winter, has small occupied area and low energy consumption, adopts SiO2 aerogel as a novel environment-friendly material, is light in weight, can effectively lighten the load of dead weight on the template and a girder-making pedestal, is high-efficiency heat-insulating and fireproof, can replace flammable materials such as extruded polystyrene boards, rock cottons and cotton quilts which are more used in the existing building, is environment-friendly, reduces pollution to natural environment and damage to human bodies, is high-efficiency, does not need to build a factory shed, and can realize rapid preparation of precast concrete girders.
In summary, the utility model provides an assembled heat-insulating template for a precast concrete box girder, and the precast box girder has the advantages that in the winter construction process, the cement hydration rate is reduced due to lower air temperature, the concrete strength development is slow, the heat-insulating template is particularly important, the heat-insulating template consists of a steel template, a silica aerogel heat-insulating plate, silica aerogel mortar, a silica heat-insulating felt and a binder, the concrete is characterized in that the silica aerogel heat-insulating plate is placed on the outer side of the precast box girder steel template, the heat-insulating plate is cut into a proper size according to the shape of the steel template, the heat-insulating plate is adhered on the template by adopting the binder, a layer of silica aerogel mortar is coated, a silica aerogel coating is coated on the outermost side after the strength is formed, the used heat insulation material silicon dioxide aerogel can be used within the range of-200 ℃ to 1000 ℃, has very good applicability to heat insulation under extreme conditions, adopts SiO 2 aerogel heat insulation coating on the heat insulation of the template from the aspects of energy conservation and environmental protection, has excellent heat insulation performance, high temperature resistance, convenient construction, direct coating on a wall body, reduction of a plurality of construction procedures, incombustibility of the material, healthy and environmental protection of the production process flow, low cement hydration rate in the construction process of a precast box girder in winter due to lower air temperature, slow development of concrete strength, reduced turnover rate of a mould, great effect on improving the service life of the bridge, contribution to the formation of the concrete strength of the precast girder in the construction in winter, simple structure and convenient installation, the safety and convenience of precast beam preparation can be improved greatly.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same; although the present utility model has been described in detail with reference to the above embodiments; those of ordinary skill in the art will appreciate that: modifications and equivalents may be made to the specific embodiments of the utility model; without departing from the spirit and scope of the utility model, any modifications or equivalent substitutions; which are intended to be encompassed within the scope of the present utility model as defined by the appended claims.
Claims (8)
1. The assembled heat preservation template for the concrete precast box girder is characterized by comprising a box girder steel template assembly, a precast box girder (4) and a protection heat preservation unit; the prefabricated box girder (4) is arranged in the box girder steel template assembly, and the protection and heat preservation unit is coated on the outer side of the box girder steel template assembly;
The protective heat-insulating unit comprises a protective layer (1) and a heat-insulating layer (2), wherein the heat-insulating layer (2) is coated outside the box girder steel template outer mold (3), and the protective layer (1) is coated outside the heat-insulating layer (2);
The heat preservation layer (2) is a SiO 2 aerogel heat-insulating plate (8), and the SiO 2 aerogel heat-insulating plate (8) is coated and arranged outside the box girder steel template outer mold (3).
2. The assembled heat preservation template for the concrete precast box girder according to claim 1, wherein the box girder steel template assembly comprises a box girder steel template outer mold (3) and a box girder steel template inner mold (5), the box girder steel template inner mold (5) is arranged inside a precast box girder (4), the box girder steel template outer mold (3) is arranged outside the precast box girder (4), and the protective heat preservation unit is coated outside the box girder steel template outer mold (3).
3. The assembled heat preservation template for the concrete precast box girder according to claim 1 is characterized in that an adhesive (7) is further arranged between the SiO 2 aerogel heat-insulating plate (8) and the box girder steel template outer mold (3), and the SiO 2 aerogel heat-insulating plate (8) is coated and arranged outside the box girder steel template outer mold (3) through the adhesive (7).
4. The assembled heat preservation template for the concrete precast box girder according to claim 1, wherein the protective layer (1) is a hydrophobic modified SiO 2 aerogel coating (10), and the hydrophobic modified SiO 2 aerogel coating is coated on the outer part of the heat preservation layer (2).
5. The assembled heat preservation template for the concrete precast box girder according to claim 4, wherein a layer of SiO 2 aerogel mortar (9) is further coated between the hydrophobically modified SiO 2 aerogel coating (10) and the heat preservation layer (2), and the hydrophobically modified SiO 2 aerogel coating (10) is coated outside the heat preservation layer (2) through the SiO 2 aerogel mortar (9).
6. The assembled heat preservation template for the concrete precast box girder according to claim 4, wherein the protective layer (1) can be SiO 2 aerogel heat insulation felt.
7. The prefabricated heat preservation formwork for the concrete prefabricated box girder according to claim 1, wherein the prefabricated box girder formwork further comprises a plurality of box girder steel formwork pedestals (6), and the plurality of box girder steel formwork pedestals (6) are arranged at the bottom of the box girder steel formwork assembly through the protection heat preservation unit.
8. An assembled heat preservation formwork for precast concrete box girders according to claim 7, characterized in that the heights of several box girder steel formwork pedestals (6) are the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322292715.6U CN221066680U (en) | 2023-08-24 | 2023-08-24 | Assembled heat preservation template for concrete precast box girder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322292715.6U CN221066680U (en) | 2023-08-24 | 2023-08-24 | Assembled heat preservation template for concrete precast box girder |
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| Publication Number | Publication Date |
|---|---|
| CN221066680U true CN221066680U (en) | 2024-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322292715.6U Active CN221066680U (en) | 2023-08-24 | 2023-08-24 | Assembled heat preservation template for concrete precast box girder |
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| Country | Link |
|---|---|
| CN (1) | CN221066680U (en) |
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2023
- 2023-08-24 CN CN202322292715.6U patent/CN221066680U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |