CN111207994A - Steel strength detection device for building detection - Google Patents
Steel strength detection device for building detection Download PDFInfo
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- CN111207994A CN111207994A CN202010053662.0A CN202010053662A CN111207994A CN 111207994 A CN111207994 A CN 111207994A CN 202010053662 A CN202010053662 A CN 202010053662A CN 111207994 A CN111207994 A CN 111207994A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0044—Pneumatic means
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Abstract
The invention relates to the technical field of building detection, in particular to a steel strength detection device for building detection, which comprises a base, wherein the top of the base is provided with a seat plate, a bearing plate is arranged on the base, the bottom end of the bearing plate is arranged on the seat plate through a supporting spring, two ends of the bearing plate are respectively provided with a side connecting plate, two ends of each side connecting plate are provided with a force application pull rod, two ends of the seat plate are connected with pull ropes, a pressure measurement frame is arranged on a fixed frame, the pressure measurement frame is respectively provided with an outer cylinder frame and an inner cylinder roller, the inner cylinder roller is arranged in the outer cylinder frame in a penetrating manner, the middle position of the inner cylinder roller is provided with a movable rotating shaft, two sides of the outer cylinder frame are respectively connected with the front shaft end and the rear shaft end of the movable rotating shaft through fixed rods. This application is whole from gravity, the conversion of multi-angle is carried out to the intensity of steel from three data points of pressure and deformation volume, guarantees its detection accuracy.
Description
Technical Field
The invention relates to the technical field of building detection, in particular to a steel strength detection device for building detection.
Background
A large amount of steel such as various steel bars, steel plates, section steel and the like are usually used in places such as construction sites, the strength of the building steel refers to the capacity of resisting breakage of materials under the action of external force, the strength of the building steel is an important index which must be measured when the materials are used, the steel can be used after the mechanical properties of the steel are inspected to be qualified, and the conventional steel strength detection device for building detection is large in size and high in price, generally only available in a professional laboratory, is not suitable for inspection of a building construction site anytime and anywhere, and is not beneficial to use of people.
Chinese patent (No. CN 201820461448.7) discloses a steel strength detection device for building detection, which is convenient to use by arranging a fixing block, a supporting block, a motor, a first connecting rod, a fixing rod, a second connecting rod, a gear, a tooth block, a guide block, a fixing plate, a clamping rod, a supporting plate, a hydraulic cylinder and a pressing rod. However, the patent has certain defects, and the steel strength needs to be detected from the basis of data due to the importance of steel strength detection.
Disclosure of Invention
The invention aims to provide a steel strength detection device for building detection, which solves the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a steel strength detection device for building detection comprises a base, wherein a seat plate is arranged at the top of the base, fixing frames are arranged at two ends of the seat plate, an upper edge support is arranged on each fixing frame, a positioning frame plate is arranged on each upper edge support, a bearing plate is arranged on the base, the bottom end of each bearing plate is arranged on the seat plate through a supporting spring, side connecting plates are arranged at two ends of each bearing plate, force application pull rods are arranged at two ends of each side connecting plate, pull ropes are connected with two ends of the seat plate, a pressure measurement frame is arranged on each fixing frame, the main body of the pressure measurement frame is of a cylindrical structure, an outer cylinder frame and an inner cylinder roller are arranged on each pressure measurement frame respectively, the inner cylinder roller penetrates through the outer cylinder frame, a movable rotating shaft is arranged at the middle position of the inner cylinder roller, the inner cylinder roller is fixedly arranged and does not, the outer cylinder frame and the inner cylinder roller are coaxially arranged, the two sides of the outer cylinder frame are connected with the front shaft end and the rear shaft end of the movable rotating shaft through fixing rods respectively, the roller surface of the inner cylinder roller is wound with a curling spring, and the two ends of the curling spring are connected with the fixing rods on the front side and the rear side respectively.
As a further scheme of the invention: the pull rope is made of a steel wire rope, and the upper rope and the lower rope are fixedly twisted.
As a further scheme of the invention: and the inner cylinder roller is provided with an elasticity detector.
As a further scheme of the invention: and the positioning frame plate is provided with a gravity test frame.
As a further scheme of the invention: the inner chamber of gravity test frame installs the slide bar, be sliding connection on the slide bar and install the sliding sleeve, the sliding sleeve is slidable mounting on the slide bar, the side of gravity test frame is along installing the sliding block, the sliding block is connected with the sliding sleeve, the external tension rod of installing of sliding block, the tension rod is connected through the activity bolt with the application of force pull rod.
As a further scheme of the invention: the side of gravity test frame is along being provided with photosensitive scale, the other end of sliding sleeve is connected with photosensitive mark spare, photosensitive mark spare and photosensitive scale phase-match.
As a further scheme of the invention: install the deformation volume test jig on the left and right sides locating support plate, actuating cylinder is installed to the bottom of deformation volume test jig, actuating cylinder's pneumatic end has been saved the telescopic link, the bottom rod end of telescopic link is installed down the pressure head, the central line notch has been seted up to the central line position of pressure head down, central line notch top is provided with pressure detector.
As a further scheme of the invention: the contact surface of the lower pressure head is of a hemispherical structure.
As a further scheme of the invention: the bottom of pressure detector is provided with the dead lever, the bottom rod end of dead lever is movable cover and is equipped with movable sleeve, contact block is installed to movable sleeve's bottom.
As a still further scheme of the invention: an extrusion spring is wound on the fixed rod, the bottom end of the extrusion spring is fixedly connected to the top end of the movable sleeve, and the top end of the extrusion spring is connected with the pressure detector.
Compared with the prior art, the invention has the beneficial effects that:
through slide bar mechanism, treat that the holding power of spring reaches balanced back with steel, judge the displacement interval of sliding sleeve, the effect of short-term test steel gravity, this application detects in step from both sides moreover, effectively detects out the equilibrium at steel both ends to the material homogeneity to steel carries out preliminary judgement.
And secondly, the re-curling spring generates screwing type deformation, and an elastic force detector arranged in the inner cylinder roller detects and processes the curling spring, so that the extrusion condition of the steel is analyzed, and the extrusion condition of the steel is judged from two directions.
The deformation quantity testing mechanism is further arranged and matched with the elastic mechanism through the driving air cylinder. The deformation is estimated according to the elastic coefficient, so that the deformation condition of the steel is judged, the whole operation is simple and effective, the micro deformation data can be accurately converted, the workload is reduced, and the detection precision is ensured.
The spring is adopted as a conversion object in the whole application, three data points of gravity, pressure and deformation are started, data sampling is conducted on the left end and the right end, multi-angle conversion is conducted on the strength of steel, and the detection precision is guaranteed.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application. Also, the drawings and the description are not intended to limit the scope of the present concepts in any way, but rather to illustrate the concepts of the present disclosure to those skilled in the art by reference to specific embodiments.
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic structural diagram of the gravity testing jig of the present invention.
Fig. 3 is a schematic structural view of the pressure measuring rack of the present invention.
Fig. 4 is a schematic structural view of the coil spring according to the present invention.
FIG. 5 is a schematic view of the structure of the pressure detector according to the present invention.
In the figure: 1-base, 11-seat plate, 12-fixed frame, 13-upper edge bracket, 14-locating frame plate, 15-bearing plate, 16-supporting spring, 17-side connecting plate, 2-gravity testing frame, 21-sliding rod, 22-sliding sleeve, 24-sliding block, 25-tension rod, 26-photosensitive scale, 27-photosensitive standard, 31-pull rope, 32-pressure measuring frame, 34-inner cylinder roller, 35-outer cylinder frame, 36-curling spring, 37-movable rotating shaft, 38-fixed rod, 4-deformation testing frame, 41-driving cylinder, 42-telescopic rod, 43-lower pressure head, 44-midline notch, 45-pressure detector, 46-fixed rod, 47-extruding spring, 48-movable sleeve pipe, 49-contact block.
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, examples of which are shown in the drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements, unless otherwise indicated.
It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1, the steel strength detection device for building detection includes a base 1, a seat plate 11 is disposed at the top of the base 1, fixing frames 12 are mounted at two ends of the seat plate 11, an upper edge support 13 is mounted on the fixing frames 12, and a positioning frame plate 14 is mounted on the upper edge support 13. In this application, bedplate 11 is the mechanism of placing of base 1 for as bearing weight of steel. For detecting the strength of steel, the method starts from three directions of gravity, pressure and deformation to judge the overall strength of the steel.
Referring to fig. 1 and 2, a bearing plate 15 is arranged on a base 1, the bottom end of the bearing plate 15 is mounted on a seat plate 11 through a support spring 16, side connection plates 17 are mounted at both ends of the bearing plate 15, force application pull rods 18 are mounted at both ends of the side connection plates 17, a gravity test frame 2 is mounted on a positioning frame plate 14, a slide rod 21 is mounted in an inner cavity of the gravity test frame 2, a slide sleeve 22 is slidably mounted on the slide rod 21, the slide sleeve 22 is slidably mounted on the slide rod 21, a slide block 24 is mounted at a side edge of the gravity test frame 2, the slide block 24 is connected with the slide sleeve 22, a tension rod 25 is externally mounted on the slide block 24, and the tension rod 25 is connected with the force application pull rods 18 through movable bolts.
In this application, loading board 15 passes through supporting spring 16 to be installed on bedplate 11, place steel after, loading board 15 receives steel's pressure to move down, the application of force pull rod 18 that is connected with loading board 15 moves down in step, and then sliding sleeve 22 slides along slide bar 21, treat that the holding power of spring reaches balanced back with steel, sliding sleeve 22 stops to remove, thereby judge sliding sleeve 22's displacement interval, the deformation volume of spring promptly, from reaching the effect of short-term test steel gravity, and this application detects from both sides in step, effectively detect out the degree of balance at steel both ends, thereby carry out preliminary judgement to the material homogeneity of steel.
Referring to fig. 1, 3 and 4, two ends of the seat plate 11 are connected with pull ropes 31, a pressure measurement frame 32 is mounted on the fixed frame 12, a main body of the pressure measurement frame 32 is of a cylindrical structure, an outer cylinder frame 35 and an inner cylinder roller 34 are respectively disposed on the pressure measurement frame 32, the inner cylinder roller 34 is inserted into the outer cylinder frame 35, a movable rotating shaft 37 is mounted in the middle of the inner cylinder roller 34, the inner cylinder roller 34 is fixedly mounted and does not rotate along with the movable rotating shaft 37, the outer cylinder frame 35 and the inner cylinder roller 34 are coaxially arranged, two sides of the outer cylinder frame 35 are respectively connected with front and rear shaft ends of the movable rotating shaft 37 through fixing rods 38, a curling spring 36 is wound on a roller surface of the inner cylinder roller 34, and two ends of the curling spring 36 are respectively connected with the fixing rods 38 on the front and rear sides. The inner cylinder roller 34 is provided with an elasticity detector. The pull rope 31 is made of a steel wire rope, and the upper and lower ropes are fixedly twisted.
The seat plate is used as a whole, the steel material is extruded to generate a falling condition, the pull rope 31 is tightened at the moment, the outer cylinder frame 35 is driven to rotate, the fixed rod 38 is pulled to rotate by taking the movable rotating shaft 37 as an axis while the outer cylinder frame 35 rotates, the inner curling spring 36 is driven to generate rotary-screwing type deformation, the curling spring 36 is detected and processed by the built-in elasticity detector of the inner cylinder roller 34, the steel material extrusion condition is analyzed, and the steel material extrusion condition is judged from two directions.
Referring to fig. 1 and 5, the left and right fixture plate 14 are provided with a deformation amount testing jig 4, the bottom end of the deformation quantity testing frame 4 is provided with a driving cylinder 41, the pneumatic end of the driving cylinder 41 is provided with an expansion link 42, the bottom rod end of the telescopic rod 42 is provided with a lower pressure head 43, the contact surface of the lower pressure head 43 is of a hemispherical structure, a midline notch 44 is arranged at the midline position of the lower pressure head 43, a pressure detector 45 is arranged at the top of the midline notch 44, the bottom end of the pressure detector 45 is provided with a fixed rod 46, the bottom rod end of the fixed rod 46 is movably sleeved with a movable sleeve 48, a contact block 49 is installed at the bottom end of the movable sleeve 48, a pressing spring 47 is wound on the fixed rod 46, the bottom end of the extrusion spring 47 is fixedly connected to the top end of the movable sleeve 48, and the top end of the extrusion spring 47 is connected with the pressure detector 45.
The device is also provided with a deformation quantity testing mechanism, the telescopic rod 42 is pushed to move downwards by the driving cylinder 41, the steel is extruded by the lower pressure head 43, thereby detecting the deformation condition of the steel contact surface, the middle line position of the lower pressure head 43 is provided with a middle line notch 44, the top of the center line notch 44 is provided with a pressure detector 45, the pressure detector 45 is contacted with the deformation area of the steel material through a contact block 49 at the bottom, thereby pushing the contact block 49 to move down to be attached to the steel surface to the pressing spring 47, the compression amount of the pressing spring 47 is reduced, that is, the length is increased, the pressure detector 45 is converted by the elastic force of the pressing spring 47, and the amount of deformation is estimated from the elastic modulus, therefore, the deformation condition of the steel is judged, the whole operation is simple and effective, the micro deformation data can be accurately converted, the workload is reduced, and the detection precision is guaranteed.
This application wholly adopts the spring as the conversion object, from gravity, three data points of pressure and deformation volume start to control both ends and carry out data sampling, carry out the conversion of multi-angle to the intensity of steel, guarantee its detection accuracy.
Example two:
referring to fig. 2, this embodiment is a further optimization of the embodiment, and on the basis of this, a photosensitive scale 26 is disposed on a side edge of the gravity testing jig 2, and a photosensitive standard 27 is connected to the other end of the sliding sleeve 22, and the photosensitive standard 27 is matched with the photosensitive scale 26. The acceleration change that steel moved down can also be judged through photosensitive equipment's assistance to itself, and then make the auxiliary calculation to the displacement of short distance, reduce spring vibration's influence factor, reduce experimental data error.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The steel strength detection device for building detection comprises a base (1), wherein a seat plate (11) is arranged at the top of the base (1), fixing frames (12) are installed at two ends of the seat plate (11), an upper edge support (13) is installed on the fixing frames (12), and a positioning frame plate (14) is installed on the upper edge support (13), and is characterized in that a bearing plate (15) is arranged on the base (1), the bottom end of the bearing plate (15) is installed on the seat plate (11) through a supporting spring (16), side connecting plates (17) are installed at two ends of the bearing plate (15), force application pull rods (18) are installed at two ends of the side connecting plates (17), pull ropes (31) are connected at two ends of the seat plate (11), a pressure measurement frame (32) is installed on the fixing frames (12), and the main body of the pressure measurement frame (32) is of a cylindrical structure, be provided with outer barrel frame (35) and inner tube roller (34) on pressure measurement frame (32) respectively, inner tube roller (34) are worn to establish in outer barrel frame (35), movable pivot (37) are installed to the intermediate position of inner tube roller (34), inner tube roller (34) are fixed installation and do not rotate along with movable pivot (37), outer barrel frame (35) and inner tube roller (34) are the coaxial line and arrange, be connected through dead lever (38) between the both sides of outer barrel frame (35) and the front and back axle head of activity pivot (37) respectively, the winding has coil spring (36) on the roll surface of inner tube roller (34), coil spring (36)'s both ends are connected with dead lever (38) of both sides around respectively again.
2. The steel strength detecting device for building inspection according to claim 1, wherein the pulling rope (31) is made of a steel wire rope, and the upper and lower ropes are fixedly twisted.
3. The steel material strength detection device for building detection according to claim 1, wherein an elastic force detector is provided to the inner cylindrical roller (34).
4. The steel strength detecting device for building inspection according to claim 1, wherein a gravity test jig (2) is mounted on the locator plate (14).
5. The steel strength detection device for building detection according to claim 4, characterized in that a slide bar (21) is installed in the inner cavity of the gravity test frame (2), a slide sleeve (22) is installed on the slide bar (21) in a sliding connection manner, the slide sleeve (22) is installed on the slide bar (21) in a sliding manner, a slide block (24) is installed on the side edge of the gravity test frame (2), the slide block (24) is connected with the slide sleeve (22), a tension rod (25) is installed outside the slide block (24), and the tension rod (25) is connected with the force application pull rod (18) through a movable bolt.
6. The steel strength detection device for building detection according to claim 5, wherein a photosensitive scale (26) is arranged on the side edge of the gravity test frame (2), a photosensitive standard (27) is connected to the other end of the sliding sleeve (22), and the photosensitive standard (27) is matched with the photosensitive scale (26).
7. The steel strength detection device for building detection according to any one of claims 1 to 5, wherein deformation amount test frames (4) are mounted on left and right side locator frame plates (14), a driving cylinder (41) is mounted at the bottom end of each deformation amount test frame (4), an expansion link (42) is arranged at the pneumatic end of each driving cylinder (41), a lower pressure head (43) is mounted at the bottom rod end of each expansion link (42), a central line notch (44) is formed in the central line position of each lower pressure head (43), and a pressure detector (45) is arranged at the top of each central line notch (44).
8. The steel strength detecting device for building inspection according to claim 7, wherein the contact surface of the lower ram (43) has a hemispherical structure.
9. The steel strength detecting device for building detection according to claim 7, wherein a fixed rod (46) is provided at the bottom end of the pressure detector (45), a movable sleeve (48) is movably sleeved at the bottom rod end of the fixed rod (46), and a contact block (49) is installed at the bottom end of the movable sleeve (48).
10. The steel strength detecting device for building detection according to claim 9, wherein a pressing spring (47) is wound on the fixing rod (46), a bottom end of the pressing spring (47) is fixedly connected to a top end of the movable sleeve (48), and a top end of the pressing spring (47) is connected to the pressure detector (45).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010053662.0A CN111207994A (en) | 2020-01-17 | 2020-01-17 | Steel strength detection device for building detection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010053662.0A CN111207994A (en) | 2020-01-17 | 2020-01-17 | Steel strength detection device for building detection |
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| CN111207994A true CN111207994A (en) | 2020-05-29 |
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| CN202010053662.0A Pending CN111207994A (en) | 2020-01-17 | 2020-01-17 | Steel strength detection device for building detection |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111521357A (en) * | 2020-06-18 | 2020-08-11 | 赵桂荣 | Working method of steel structure building main beam stability detection device |
| CN111776414A (en) * | 2020-07-03 | 2020-10-16 | 岳阳经济技术开发区弘发物流有限公司 | Protector is used in logistics distribution |
| CN112833958A (en) * | 2021-01-22 | 2021-05-25 | 成都建工集团有限公司 | Quality control system for house fine decoration |
| CN115855702A (en) * | 2023-02-08 | 2023-03-28 | 山东省建设建工（集团）有限责任公司 | Wall strength detecting instrument for building construction based on interval variation |
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| CN208140492U (en) * | 2018-04-03 | 2018-11-23 | 浙江峰邦机械科技有限公司 | A kind of building detection steel strength detection device |
| CN208366722U (en) * | 2018-06-08 | 2019-01-11 | 广东大兴钢铁实业有限公司 | A kind of construction material steel bar quality detection device |
| CN109883845A (en) * | 2019-03-01 | 2019-06-14 | 武汉理工大学 | A kind of five gold bullion quality detection devices |
| CN209280453U (en) * | 2018-11-23 | 2019-08-20 | 江苏建盛工程质量鉴定检测有限公司 | Reinforcement stresses device for measurement of strain |
| CN110426281A (en) * | 2019-07-29 | 2019-11-08 | 泸州临港工业化建筑科技有限公司 | A kind of construction steel structure intensity detecting device convenient for recycling |
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2020
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN208140492U (en) * | 2018-04-03 | 2018-11-23 | 浙江峰邦机械科技有限公司 | A kind of building detection steel strength detection device |
| CN208366722U (en) * | 2018-06-08 | 2019-01-11 | 广东大兴钢铁实业有限公司 | A kind of construction material steel bar quality detection device |
| CN209280453U (en) * | 2018-11-23 | 2019-08-20 | 江苏建盛工程质量鉴定检测有限公司 | Reinforcement stresses device for measurement of strain |
| CN109883845A (en) * | 2019-03-01 | 2019-06-14 | 武汉理工大学 | A kind of five gold bullion quality detection devices |
| CN110426281A (en) * | 2019-07-29 | 2019-11-08 | 泸州临港工业化建筑科技有限公司 | A kind of construction steel structure intensity detecting device convenient for recycling |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111521357A (en) * | 2020-06-18 | 2020-08-11 | 赵桂荣 | Working method of steel structure building main beam stability detection device |
| CN111521357B (en) * | 2020-06-18 | 2022-07-19 | 山东鼎启莱钢结构工程有限公司 | Working method of steel structure building main beam stability detection device |
| CN111776414A (en) * | 2020-07-03 | 2020-10-16 | 岳阳经济技术开发区弘发物流有限公司 | Protector is used in logistics distribution |
| CN112833958A (en) * | 2021-01-22 | 2021-05-25 | 成都建工集团有限公司 | Quality control system for house fine decoration |
| CN115855702A (en) * | 2023-02-08 | 2023-03-28 | 山东省建设建工（集团）有限责任公司 | Wall strength detecting instrument for building construction based on interval variation |
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Application publication date: 20200529 |
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