CN112942672A - PBL self-locking plate for reducing slippage of recycled concrete and section steel - Google Patents
PBL self-locking plate for reducing slippage of recycled concrete and section steel Download PDFInfo
- Publication number
- CN112942672A CN112942672A CN202110138442.2A CN202110138442A CN112942672A CN 112942672 A CN112942672 A CN 112942672A CN 202110138442 A CN202110138442 A CN 202110138442A CN 112942672 A CN112942672 A CN 112942672A
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- self
- side wall
- locking plate
- section steel
- recycled concrete
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/61—Connections for building structures in general of slab-shaped building elements with each other
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
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- Electromagnetism (AREA)
- Joining Of Building Structures In Genera (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Abstract
The invention discloses a PBL self-locking plate for reducing slippage of recycled concrete and section steel, which relates to the field of building construction and comprises a section steel body and two self-locking plate bodies, wherein the two self-locking plate bodies are arranged on the side wall of the upper end of the section steel body, the side wall of the upper end of the section steel body is symmetrically provided with two insertion grooves, the whole coordination between the recycled concrete and the section steel is effectively increased through the matched use among the self-locking plate bodies, side plates, connecting reinforcing bars, a sliding cavity, a binder, a push plate, a push rod and pull ropes, when the adhesion stress between the recycled concrete and the section steel is reduced to generate slippage, the recycled concrete drives the push plate to slide, the second slide block in the sliding cavity is driven by the pull rod to extrude the binder in the sliding cavity, a glue outlet is driven to be automatically opened, and the binder in the sliding cavity is automatically extruded into a slippage gap of the recycled concrete, the binding power of the recycled concrete is increased, and the binding slip between the recycled concrete and the section steel is effectively reduced.
Description
Technical Field
The invention relates to the field of building construction, in particular to a PBL self-locking plate for reducing slippage of recycled concrete and section steel.
Background
The section steel concrete structure is a structure mainly provided with section steel in concrete and provided with certain transverse stirrups and longitudinal stress reinforcing steel bars, and has high bearing capacity, high rigidity, good ductility and energy consumption performance, and good earthquake resistance. At present, a great deal of research is carried out on the regeneration of concrete aiming at the existence of a great deal of construction waste in the society, the regenerated concrete is used as a novel green environment-friendly material before being applied to actual engineering, a lot of performances are needed to be researched and solved, the bonding slip performance between the regenerated concrete and section steel is one of the problems needing to be solved, the bonding slip performance between the concrete and the section steel is taken as an important reference basis of a section steel concrete structure, the bonding slip performance is a foundation and a premise that the section steel and the concrete work cooperatively, and the two materials can realize the stress transmission due to the mutual bonding force existing in the interface between the concrete and the section steel, so that the external load bearing effect is realized, and the importance of the bonding slip performance on the section steel concrete structure is shown. (ii) a
The recycled concrete is different from the common aggregate concrete in that the aggregate is generated by crushing waste concrete, the interface condition of the recycled aggregate and cement mortar is far more complicated than that of the common aggregate, however, the bonding slip performance is just the interaction between the interfaces of two materials of the section steel and the recycled concrete, and the difference of the bonding interfaces between the section steel and the recycled concrete is inevitable due to the difference of the interfaces of the aggregates, so that the necessity of researching the bonding slip performance between the two materials is increased, in the prior art, in order to reduce the bonding slip between the recycled concrete and the section steel, a plurality of shear connectors (such as shear nails) are generally arranged on the side wall of the section steel, when the existing shear connectors are used, the existing shear connectors are installed in a welding mode, the construction process is slow, and the bonding slip resistance between the section steel and the recycled concrete is poor, so that a PBL self-locking plate for reducing the slip between the recycled concrete and the section steel is provided, the above problems are solved.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a PBL self-locking plate for reducing the slippage of recycled concrete and section steel.
In order to achieve the purpose, the invention adopts the following technical scheme:
a PBL self-locking plate for reducing slippage of recycled concrete and section steel comprises a section steel body and two self-locking plate bodies, wherein the two self-locking plate bodies are arranged on the upper end side wall of the section steel body, two insertion grooves are symmetrically formed in the upper end side wall of the section steel body, two insertion holes are symmetrically formed in the lower end side walls of the two insertion grooves in a penetrating mode, sliding grooves are formed in the lower end side walls of the two self-locking plate bodies, two first sliding blocks are symmetrically and slidably connected to the side walls of the sliding grooves, clamping hooks are fixedly connected to the lower end side walls of the two first sliding blocks, connecting rods are rotatably connected to the side walls of the two clamping hooks, the tail ends of the two connecting rods are rotatably connected with a connecting block together, a first spring is fixedly connected to the lower end side wall of the connecting block, the tail end of the first spring abuts against the lower end side wall of the insertion groove, and the tail ends of the, the clamping hook is abutted against the side wall of the section steel body, the side wall of the upper end of the self-locking plate body is symmetrically and fixedly connected with two side plates, a plurality of threaded holes are respectively arranged on the side walls of the two side plates in a penetrating way, a plurality of threaded holes of the side plates on the side walls of the two self-locking plate bodies are respectively and jointly in threaded connection with a plurality of connecting reinforcing bars, a sliding cavity is arranged in the side wall of the self-locking plate body, a displacement mechanism is arranged in the sliding cavity, the tail end of the displacement mechanism penetrates through the side wall of the sliding cavity and extends to the outside of the self-locking plate body, the side wall of the upper end of the sliding cavity is provided with a glue outlet in a penetrating way, the side wall of the glue outlet is provided with a containing groove, the side wall of the containing groove is connected with a baffle plate in a sliding way, the side wall of one end of the baffle is fixedly connected with a pull rope, and the tail end of the pull rope sequentially penetrates through the side walls of the accommodating groove and the sliding cavity and is fixedly connected with the side wall of the displacement mechanism.
Preferably, the extrusion mechanism includes the second slider of sliding connection on the sliding cavity lateral wall, the one end lateral wall fixedly connected with pull rod of second slider, the end of pull rod runs through the lateral wall of sliding cavity and extends to the outside from the jam plate body, the terminal fixedly connected with push pedal of pull rod, the other end lateral wall fixedly connected with second spring of second slider, the terminal fixed connection of second spring is on the lateral wall of sliding cavity, the one end fixed connection of stay cord is at the lateral wall of second slider.
Preferably, the push plate is tightly attached to the side wall of the self-locking plate body.
Preferably, the second sliding block is tightly attached to the side wall of the sliding cavity.
Preferably, the second spring is a tension spring and is made of stainless steel.
Preferably, the side wall of the connecting reinforcing bar is provided with a plurality of sections of threads.
Preferably, the first spring is an elastic spring and is made of stainless steel.
Preferably, the baffle is tightly attached to the side wall of the glue outlet.
Preferably, the slide cavity is filled with adhesive.
The invention has the beneficial effects that: according to the invention, through the matched use of the self-locking plate body, the side plates, the connecting reinforcing bars, the sliding cavity, the adhesive, the push plate, the push rod and the pull rope, firstly, through the arrangement of the connecting reinforcing bars, the overall coordination between the recycled concrete and the section steel can be effectively increased, when the bonding stress between the recycled concrete and the bonding surface of the section steel is reduced to generate slippage, the recycled concrete drives the push plate to slide, the pull rod drives the second slide block in the sliding cavity to extrude the adhesive in the sliding cavity, and meanwhile, the second slide block automatically opens the glue outlet on the side wall of the self-locking plate body through the pull rope, so that the adhesive in the sliding cavity can be automatically extruded into the slippage gap of the recycled concrete, the bonding force of the recycled concrete is increased, and the bonding slippage between the recycled concrete and the section steel is effectively reduced;
through the shaped steel body, from the jam plate body, first slider, the pothook, the connecting rod, first spring, cooperation between the inserting groove is used, when installing from the jam plate body, to insert from the pothook on the jam plate body lower extreme lateral wall in the socket of the inserting groove that matches on the shaped steel, through the elasticity extrusion between the lateral wall of first spring and inserting groove, make the connecting rod promote the pothook and open to automatic both sides, and then make pothook and shaped steel to the straining, realize from the quick installation of jam plate body, high convenience and fastness, and it is firm to connect.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a side view of the structure of the present invention.
Fig. 3 is a top view of the structure of the present invention.
FIG. 4 is a schematic view of the insertion groove of the present invention.
Fig. 5 is an enlarged view of a portion a of the present invention.
Fig. 6 is an enlarged view of part B of the present invention.
Reference numbers in the figures: 1 shaped steel body, 2 from jam plate body, 3 inserting groove, 4 sockets, 5 spout, 6 first slider, 7 pothooks, 8 connecting rods, 9 connecting blocks, 10 first spring, 11 curb plates, 12 screw holes, 13 connection arrangement of reinforcement, 14 smooth chamber, 15 second slider, 16 push rods, 17 push plates, 18 second spring, 19 play jiao kou, 20 accomodate groove, 21 baffle, 22 stay cord.
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.
Referring to fig. 1-6, a PBL self-locking plate for reducing slippage of recycled concrete and section steel comprises a section steel body 1 and two self-locking plate bodies 2, wherein the two self-locking plate bodies 2 are both arranged on the upper end side wall of the section steel body 1, two insertion grooves 3 are symmetrically formed in the upper end side wall of the section steel body 1, two insertion ports 4 are symmetrically formed in the lower end side walls of the two insertion grooves 3 in a penetrating manner, sliding grooves 5 are respectively formed in the lower end side walls of the two self-locking plate bodies 2, two first sliding blocks 6 are symmetrically and slidably connected to the side walls of the sliding grooves 5, hooks 7 are fixedly connected to the lower end side walls of the two first sliding blocks 6, connecting rods 8 are rotatably connected to the side walls of the two hooks 7, a connecting block 9 is rotatably connected to the ends of the two connecting rods 8 together, a first spring 10 is fixedly connected to the lower end side wall of the connecting block 9, the first spring 10 is an elastic spring and is made of stainless steel, and the spring made of stainless steel has good formability and corrosion resistance, so that the usability of the first spring 10 is improved, and the clamping hook 7 is ensured to be stably clamped on the side wall of the section steel body 1;
the tail end of the clamping hook 7 penetrates through the inside of the corresponding socket 4 and extends outwards, the clamping hook 7 is abutted against the side wall of the section steel body 1, the side wall of the upper end of the self-locking plate body 2 is symmetrically and fixedly connected with two side plates 11, the side walls of the two side plates 11 are respectively provided with a plurality of threaded holes 12 in a penetrating manner, the threaded holes 12 of the side plates 11 on the side walls of the two self-locking plate bodies 2 are respectively and jointly in threaded connection with a plurality of connecting reinforcing bars 13, the side wall of each connecting reinforcing bar 13 is provided with a plurality of sections of threads, the connecting reinforcing bars 13 can be connected with the side plates 11 on the side walls of the pair of self-locking plate bodies 2, and meanwhile, the surface of each connecting reinforcing bar 13 can be subjected to;
the self-locking plate is characterized in that a sliding cavity 14 is formed in the side wall of the self-locking plate body 2, a binder is filled in the sliding cavity 14, the binder can be made of multifunctional strong building glue, modified rosin powder, 707 resin, heavy calcium carbonate, quartz powder, precipitated barium sulfate, xylene, toluene and the like are used as raw materials, and the multifunctional strong building glue is reasonably prepared and processed, is low in cost, is cheaper in engineering cost than cement and 107 glue, is high in bonding strength, reliable in durability and high in hardening speed, and is beneficial to improving the efficacy of the binder;
the inner part of the sliding cavity 14 is provided with a displacement mechanism, the tail end of the displacement mechanism penetrates through the side wall of the sliding cavity 14 and extends to the outer part of the self-locking plate body 2, the side wall of the upper end of the sliding cavity 14 is provided with a glue outlet 19 in a penetrating way, the side wall of the glue outlet 19 is provided with an accommodating groove 20, the side wall of the accommodating groove 20 is connected with a baffle 21 in a sliding way, the baffle 21 is tightly attached to the side wall of the glue outlet 19, the sealing and the storage of a binder in the sliding cavity 14 are ensured when no sliding occurs between concrete and profile steel, the side wall of one end of the baffle 21 is fixedly connected with a pull rope 22, the tail end of the pull rope 22 sequentially penetrates through the accommodating groove 20 and the side wall of the sliding cavity 14 and is fixedly connected with the side wall of the displacement mechanism, the displacement mechanism comprises a second slide block 15 which is connected to the side wall of the sliding cavity 14 in a sliding way, the side wall of one end of the second slide block 15 is fixedly connected with a pull rod 16, and the tail end of, the terminal fixedly connected with push pedal 17 of pull rod 16, push pedal 17 is closely laminated with the lateral wall from jam plate body 2, the other end lateral wall fixedly connected with second spring 18 of second slider 15, the terminal fixed connection of second spring 18 is on the lateral wall of smooth chamber 14, second spring 18 is tension spring, and it is made for stainless steel material, can make push pedal 17 closely laminate from the lateral wall of jam plate body 2, avoid when concreting, push pedal 17 is strikeed by the concrete and takes place to slide, lead to the condition emergence of binder extrusion in the smooth chamber 14, the one end fixed connection of stay cord 22 is at the lateral wall of second slider 15.
The working principle is as follows: when the self-locking plate body 2 is installed, the clamping hooks 7 on the side wall of the lower end of the self-locking plate body 2 are abutted against the insertion grooves 3 on the side wall of the matched profile steel body 1, the tail ends of the clamping hooks 7 are abutted into the corresponding insertion holes 4, the first springs 10 are compressed, the tail ends of the clamping hooks 7 are clamped on the side wall of the profile steel body 1, the connecting block 9 is pushed by the elastic force of the first springs 10, the two connecting rods 8 on the side wall of the connecting block 9 rotate towards the sliding grooves 5, the connecting rods 8 push the clamping hooks 7, the two clamping hooks 7 are opened towards two sides, the tail ends of the clamping hooks 7 are ensured to be tightly clamped with the side wall of the profile steel body 1, and therefore, a plurality of pairs of self-locking plate bodies 2 are installed on the side wall of the profile steel body 1 in an insertion mode, the self-locking plate bodies 2 are installed quickly, and after the self-locking plate bodies 2 are installed, each pair of self-locking, the connecting function between the concrete and the self-locking plate body 2 can be increased through the connecting reinforcing bars 13, so that the overall coordination between the recycled concrete and the side wall of the section steel body 1 is increased, and the slippage is reduced;
when the bonding stress between the recycled concrete and the section steel body 1 is reduced and the sliding occurs, the concrete drives the push plate 17 to slide, the pull rod 16 is pulled outwards, and then the second sliding block 15 is driven to slide on the side wall of the sliding cavity 14, the second spring 18 is stretched, meanwhile, when the second sliding block 15 slides, the baffle 21 can be pulled through the pull rope 22, the baffle 21 is pulled towards the accommodating groove 20, so that the glue outlet 19 is automatically opened, the adhesive in the sliding cavity 14 can be extruded in the sliding process of the second sliding block 15, and then the sliding of the second sliding block 15 can extrude the adhesive in the sliding cavity 14 from the glue outlet 19, and the adhesive is extruded into the sliding gap of the recycled concrete, so that the bonding force of the recycled concrete is increased, and the sliding between the recycled concrete and the section steel can be effectively reduced.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. A PBL self-locking plate for reducing slippage of recycled concrete and section steel comprises a section steel body (1) and two self-locking plate bodies (2) and is characterized in that the two self-locking plate bodies (2) are arranged on the upper end side wall of the section steel body (1), the upper end side wall of the section steel body (1) is symmetrically provided with two insertion grooves (3), the lower end side walls of the two insertion grooves (3) are symmetrically provided with two insertion ports (4) in a penetrating manner, the lower end side walls of the two self-locking plate bodies (2) are respectively provided with a sliding groove (5), the side walls of the sliding grooves (5) are symmetrically and slidably connected with two first sliding blocks (6), the lower end side walls of the two first sliding blocks (6) are respectively and fixedly connected with a clamping hook (7), the side walls of the two clamping hooks (7) are respectively and rotatably connected with a connecting rod (8), and the tail ends of the two connecting rods (8) are jointly and, the lower end side wall of the connecting block (9) is fixedly connected with a first spring (10), the tail end of the first spring (10) is abutted against the lower end side wall of the inserting groove (3), the tail end of the clamping hook (7) penetrates through the inside of the corresponding inserting opening (4) and extends outwards, the clamping hook (7) is abutted against the side wall of the section steel body (1), the upper end side wall of the self-locking plate body (2) is symmetrically and fixedly connected with two side plates (11), the side walls of the two side plates (11) are respectively provided with a plurality of threaded holes (12) in a penetrating manner, a plurality of threaded holes (12) of the side plates (11) on the side wall of the two self-locking plate bodies (2) are respectively in threaded connection with a plurality of connecting reinforcing ribs (13) together, a sliding cavity (14) is formed in the side wall of the self-locking plate body (2), a squeezing mechanism is arranged in the sliding cavity (14), and the tail end of the squeezing mechanism penetrates through the side wall of the sliding cavity (14) and extends to the, the utility model discloses a mechanism of squeezing a plastic bag, including spout (19), go out the upper end lateral wall of smooth chamber (14) and run through and seted up out gluey mouth (19), seted up on the lateral wall of going out gluey mouth (19) and accomodate groove (20), sliding connection has baffle (21) on the lateral wall of accomodating groove (20), the one end lateral wall fixedly connected with stay cord (22) of baffle (21), the end of stay cord (22) runs through the lateral wall of accomodating groove (20), smooth chamber (14) in proper order and with the lateral wall fixed connection of the mechanism of crowding.
2. The PBL self-locking plate for reducing the slippage of recycled concrete and section steel according to claim 1, wherein the displacement mechanism comprises a second sliding block (15) slidably connected to the side wall of the sliding cavity (14), a pull rod (16) is fixedly connected to one end side wall of the second sliding block (15), the tail end of the pull rod (16) penetrates through the side wall of the sliding cavity (14) and extends to the outside of the self-locking plate body (2), a push plate (17) is fixedly connected to the tail end of the pull rod (16), a second spring (18) is fixedly connected to the other end side wall of the second sliding block (15), the tail end of the second spring (18) is fixedly connected to the side wall of the sliding cavity (14), and one end of the pull rope (22) is fixedly connected to the side wall of the second sliding block (15).
3. The PBL self-locking plate for reducing the slippage of recycled concrete and section steel as recited in claim 2, wherein the push plate (17) is tightly attached to the side wall of the self-locking plate body (2).
4. The PBL self-locking plate for reducing the slippage of recycled concrete and section steel as recited in claim 2, wherein the second sliding block (15) is tightly attached to the side wall of the sliding cavity (14).
5. The PBL self-locking plate for reducing the slippage of recycled concrete and section steel as recited in claim 2, wherein the second spring (18) is a tension spring and is made of stainless steel.
6. The PBL self-locking plate for reducing the slippage of recycled concrete and section steel as recited in claim 1, wherein the side wall of the connecting reinforcement bar (13) is provided with a plurality of sections of threads.
7. The PBL self-locking plate for reducing the slippage of recycled concrete and section steel as recited in claim 1, wherein said first spring (10) is a spring and is made of stainless steel.
8. The PBL self-locking plate for reducing the slippage of recycled concrete and section steel as recited in claim 1, wherein the baffle plate (21) is tightly attached to the side wall of the glue outlet (19).
9. The PBL self-locking plate for reducing the slippage of recycled concrete and section steel as recited in claim 1, wherein the inside of the sliding cavity (14) is filled with adhesive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110138442.2A CN112942672B (en) | 2021-02-01 | 2021-02-01 | PBL self-locking plate for reducing slippage of recycled concrete and section steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110138442.2A CN112942672B (en) | 2021-02-01 | 2021-02-01 | PBL self-locking plate for reducing slippage of recycled concrete and section steel |
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| Publication Number | Publication Date |
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| CN112942672A true CN112942672A (en) | 2021-06-11 |
| CN112942672B CN112942672B (en) | 2022-11-18 |
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| CN202110138442.2A Active CN112942672B (en) | 2021-02-01 | 2021-02-01 | PBL self-locking plate for reducing slippage of recycled concrete and section steel |
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| CN211257351U (en) * | 2019-10-17 | 2020-08-14 | 张春燕 | Building balcony is blowing knife coating device for waterproof construction |
| CN111719736A (en) * | 2020-07-16 | 2020-09-29 | 夏楠 | Assembly type building wallboard and installation method thereof |
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2021
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050220539A1 (en) * | 2004-04-01 | 2005-10-06 | Yee Alfred A | Precast concrete slab system and method therefor |
| CN105201965A (en) * | 2015-09-30 | 2015-12-30 | 方小龙 | Bolt and steel structure connecting mechanism |
| CN109331964A (en) * | 2018-10-18 | 2019-02-15 | 叶周航 | A kind of Digital Design and Manufacture device |
| CN209538391U (en) * | 2018-11-07 | 2019-10-25 | 西安理工大学 | Reduce the PBL self-locking plate and shear connector of regeneration concrete and fashioned iron sliding |
| CN210857573U (en) * | 2019-05-15 | 2020-06-26 | 合肥国瑞集成建筑科技有限公司 | Light noise elimination wallboard |
| CN210369317U (en) * | 2019-06-19 | 2020-04-21 | 无锡市中瑞铝业有限公司 | Buckle connecting device for special-shaped aluminum material |
| CN110410607A (en) * | 2019-08-07 | 2019-11-05 | 陈浩然 | A kind of environmental protection expansion bellow |
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| CN112942672B (en) | 2022-11-18 |
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