CN112376446A - Road and bridge crack reinforced structure - Google Patents
Road and bridge crack reinforced structure Download PDFInfo
- Publication number
- CN112376446A CN112376446A CN202011326705.4A CN202011326705A CN112376446A CN 112376446 A CN112376446 A CN 112376446A CN 202011326705 A CN202011326705 A CN 202011326705A CN 112376446 A CN112376446 A CN 112376446A
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- China
- Prior art keywords
- plate
- road
- trapezoidal plate
- bridge
- wall
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/06—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs
- F16F15/067—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs using only wound springs
Abstract
The invention discloses a road and bridge crack reinforcing structure which comprises a road and bridge body and a first trapezoidal plate, wherein the first trapezoidal plate is fixedly connected to the upper surface of the road and bridge body, and a fixing device is installed inside the road and bridge body. This road and bridge crack reinforced structure, can support first trapezoidal plate through the concrete column, fix first trapezoidal plate and concrete column through the second bolt simultaneously, thereby make first trapezoidal plate more stable, can drive the threaded rod through the handle and rotate, the threaded rod drives the second diaphragm through the L shaped plate and removes, make the second diaphragm drive first trapezoidal plate and remove, thereby the fixed effect of this device has been improved, when the T shaped plate moves down, the T shaped plate can extrude the second spring, thereby can play the effect of shock attenuation buffering to first trapezoidal plate through the elasticity performance that the second was sent forward to the spring, and then the life of this device has been improved.
Description
Technical Field
The invention relates to the technical field of roads and bridges, in particular to a road and bridge crack reinforcing structure.
Background
Road and bridge, generally by road bed, road surface, bridge, tunnel engineering and traffic engineering facility etc. several major parts make up, the road and bridge of our country are mainly prestressed concrete structure, for example some stride big river (river), extra large bridge construction of gulf, both reflect the level of building the bridge of the passerby, guaranteed high standard, high quality of the bridge, but the road and bridge is used for a long time, also can be cracked, this needs to strengthen the road and bridge producing crack, but the reinforcing apparatus structure among the prior art is too single, it is not good to strengthen the effect, and life is lower, cause the new crack easily.
Disclosure of Invention
The invention aims to provide a road and bridge crack reinforcing structure to solve the problems that the reinforcing device in the prior art provided in the background art is single in structure and poor in reinforcing effect.
In order to achieve the purpose, the invention provides the following technical scheme: a road and bridge crack reinforcing structure comprises a road and bridge body and a first trapezoidal plate, wherein the first trapezoidal plate is fixedly connected to the upper surface of the road and bridge body, a plurality of grooves are formed in the upper portion of the first trapezoidal plate, and a fixing device is installed in the road and bridge body;
the fixing device comprises a mortar layer, a concrete layer, a first transverse plate, a first bolt, a concrete column and a second bolt;
the mortar layer links to each other with the inside of road and bridge body is fixed, the concrete layer has been pour to the top on mortar layer, there are a plurality of first diaphragms in the top on concrete layer through a plurality of first bolt threaded connection, the upper surface rigid coupling of first diaphragm has the concrete column, the upper surface of concrete column is laminated with the lower surface of first trapezoidal plate mutually, the concrete column links to each other with first trapezoidal plate screw thread through the second bolt.
Preferably, the concrete column is perpendicular to the first transverse plate.
Preferably, a rotating device is installed on the inner side of the concrete column;
the rotating device comprises a rectangular block, an L-shaped plate, a threaded rod, a handle, a second transverse plate, a convex baffle, an arc-shaped clamping plate and a first spring;
control the inside of rectangular block links to each other with the outer wall of concrete column is fixed, the inboard rigid coupling of rectangular block has the L shaped plate, the inside top threaded connection of L shaped plate has the threaded rod, the top outer wall rigid coupling of threaded rod has the handle, the top of handle is equipped with the second diaphragm, the second diaphragm rotates with the top outer wall of threaded rod and links to each other, the upper surface of second diaphragm links to each other with the lower fixed surface of first trapezoidal plate, the inboard of second diaphragm is equipped with a plurality of convex baffles, the upper surface of convex baffle links to each other with the lower fixed surface of first trapezoidal plate, arc splint are all installed to the left and right sides outer wall of convex baffle, and are adjacent arc splint's preceding terminal surface has first spring through pivot swivelling joint.
Preferably, the adjacent arc-shaped clamping plates are symmetrically distributed.
Preferably, the midpoint of the handle is on the same vertical line as the midpoint of the threaded rod.
Preferably, a propping device is arranged above the concrete layer;
the abutting device comprises a box body, a support plate, a T-shaped plate, a second spring and a second trapezoidal plate;
control the lower surface outer wall of box links to each other with concrete layer's last fixed surface, the inside processing of the upper surface of box has the opening, the left and right sides outer wall rigid coupling of box has the extension board, the lower surface outer wall of extension board links to each other with concrete layer's last fixed surface, the T shaped plate is installed to the inside top of box, the below and the middle outer wall of T shaped plate respectively with the inner wall and the opening part outer wall clearance fit of box, the second spring is installed to the inside below of box, the outer wall of second spring and the inner wall clearance fit of box, the below outer wall of second spring links to each other with T shaped plate and box are fixed respectively, the top of box is equipped with the second trapezoidal plate, the lower surface of second trapezoidal plate links to each other with the last fixed surface of T shaped plate, the second trapezoidal plate rotates with arc splint through the pivot and links to each other.
Preferably, the length dimension of the lower part of the T-shaped plate is larger than the length dimension of the upper opening of the box body.
Preferably, the second trapezoidal plate and the first trapezoidal plate are arranged in parallel.
Compared with the prior art, the invention has the beneficial effects that:
this road and bridge crack reinforced structure through mutually supporting between mortar layer, concrete layer, first diaphragm, first bolt, concrete column and the second bolt isotructure, can support first trapezoidal plate through the concrete column, fixes first trapezoidal plate and concrete column through the second bolt simultaneously to it is more stable to make first trapezoidal plate.
This road and bridge crack reinforced structure through mutually supporting between structures such as rectangular block, L shaped plate, threaded rod, handle and second diaphragm, can drive the threaded rod through the handle and rotate, and the threaded rod drives the second diaphragm through the L shaped plate and removes, makes the second diaphragm drive first trapezoidal plate and removes to the fixed effect of this device has been improved.
This road and bridge crack reinforced structure, through mutually supporting between first trapezoidal plate, convex baffle, arc splint and the first spring isotructure, when the arc wall department of arc splint was entered into to the convex baffle, the arc splint can press from both sides the convex baffle tightly through the elasticity performance of first spring to make the drive arc splint that the convex baffle can be better remove.
This road and bridge crack reinforced structure, through mutually supporting between box, extension board, T shaped plate, second spring and the second trapezoidal plate isotructure, when the T shaped plate moves down, the T shaped plate can extrude the second spring to the elasticity performance of going to the spring through the second can play the effect of shock attenuation buffering to first trapezoidal plate, and then has improved the life of this device.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the mortar layer, the concrete layer and the first cross plate in FIG. 1;
FIG. 3 is a schematic structural view of the second bolt, the concrete column and the rectangular block of FIG. 1;
FIG. 4 is a schematic view of the handle, threaded rod and second cross plate of FIG. 1;
FIG. 5 is a schematic view of the structure of the arc-shaped cleat of FIG. 1, the first spring and the second trapezoidal plate;
fig. 6 is a schematic structural diagram of the second spring, the box body and the support plate in fig. 1.
In the figure: 1. road and bridge body, 2, first trapezoidal plate, 3, fixing device, 301, mortar layer, 302, concrete layer, 303, first diaphragm, 304, first bolt, 305, concrete column, 306, second bolt, 4, rotating device, 401, rectangular block, 402, L shaped plate, 403, threaded rod, 404, handle, 405, second diaphragm, 406, convex baffle, 407, arc splint, 408, first spring, 5, support device, 501, box, 502, extension board, 503, T shaped plate, 504, second spring, 505, second trapezoidal plate.
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. 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.
Referring to fig. 1-6, the present invention provides a technical solution: a road and bridge crack reinforced structure comprises a road and bridge body 1 and a first trapezoidal plate 2, wherein the upper surface of the road and bridge body 1 is fixedly connected with the first trapezoidal plate 2, 2 grooves are processed in the upper part of the first trapezoidal plate 2, a fixing device 3 is installed in the road and bridge body 1, the fixing device 3 comprises a mortar layer 301, a concrete layer 302, a first transverse plate 303, first bolts 304, concrete columns 305 and second bolts 306, the mortar layer 301 is fixedly connected with the interior of the road and bridge body 1, the mortar layer 301 can play a role of shock absorption and buffering, the concrete layer 302 is poured above the mortar layer 301, 2 first transverse plates 303 are in threaded connection with the upper part of the concrete layer 302 through 4 first bolts 304, each first transverse plate 303 is fixed on the concrete layer 302 through 2 first bolts 304, the upper surface of each first transverse plate 303 is fixedly connected with a concrete column 305, the upper surface of each concrete column 305 is attached to the lower surface of the first trapezoidal plate 2, the concrete column 305 is in threaded connection with the first trapezoidal plate 2 through the second bolt 306, the first trapezoidal plate 2 is fixed to the concrete column 305 through the second bolt 306, and the concrete column 305 and the first transverse plate 303 are arranged vertically.
The inner side of the concrete column 305 is provided with a rotating device 4, the rotating device 4 comprises a rectangular block 401, an L-shaped plate 402, a threaded rod 403, a handle 404, a second transverse plate 405, a convex baffle 406, an arc-shaped clamping plate 407 and a first spring 408, the inner parts of the left and right rectangular blocks 401 are fixedly connected with the outer wall of the concrete column 305, the inner side of the rectangular block 401 is fixedly connected with the L-shaped plate 402, the threaded rod 403 is in threaded connection with the upper part of the inner part of the L-shaped plate 402 and can move through the L-shaped plate 4023, the handle 404 is fixedly connected with the outer wall above the threaded rod 403, the second transverse plate 405 is arranged above the handle 404 and is rotatably connected with the outer wall above the threaded rod 403, the threaded rod 403 can drive the second transverse plate 405 to move, the upper surface of the second transverse plate 405 is fixedly connected with the lower surface of the first trapezoidal plate 2, the inner side of the second transverse plate 405 is provided with 2 convex baffles, arc-shaped clamping plates 407 are mounted on the outer walls of the left side and the right side of the convex baffle 406, the front end faces of the adjacent arc-shaped clamping plates 407 are in rotating connection with first springs 408 through rotating shafts, when the arc-shaped clamping plates 407 rotate outwards, the first springs 408 are in a stretching state, the adjacent arc-shaped clamping plates 407 are symmetrically distributed, and the middle points of the handles 404 and the middle points of the threaded rods 403 are on the same vertical line.
The abutting device 5 is arranged above the concrete layer 302, the abutting device 5 comprises a box body 501, a support plate 502, a T-shaped plate 503, a second spring 504 and a second trapezoidal plate 505, the outer walls of the lower surfaces of a left box body 501 and a right box body 501 are fixedly connected with the upper surface of the concrete layer 302, an opening is processed in the upper surface of the box body 501, the support plates 502 are fixedly connected with the outer walls of the left side and the right side of the box body 501, the outer wall of the lower surface of the support plate 502 is fixedly connected with the upper surface of the concrete layer 302, the support plate 502 can enable the box body 501 to be more stable, the T-shaped plate 503 is arranged above the interior of the box body 501, the lower part and the middle outer wall of the T-shaped plate 503 are respectively in clearance fit with the inner wall of the box body 501 and the outer wall of the opening, the second spring 504 is arranged below the interior of the box body 501, when the T-shaped plate 503 moves downwards, the second spring 504 is in a compressed state, the elastic performance of the second spring 504 can play a role in shock absorption and buffering, the second trapezoidal plate 505 is arranged above the box body 501, the lower surface of the second trapezoidal plate 505 is fixedly connected with the upper surface of the T-shaped plate 503, the second trapezoidal plate 505 is rotatably connected with the arc-shaped clamping plate 407 through a rotating shaft, the length of the lower part of the T-shaped plate 503 is greater than that of the upper opening of the box body 501, and the second trapezoidal plate 505 and the first trapezoidal plate 2 are arranged in parallel.
When an operator needs to use the road and bridge crack reinforcing structure, firstly, the operator drives the first cross plate 303 to move above the concrete layer 302 through the concrete column 302, and fixes the first cross plate 303 with the concrete layer 302 through the second bolt 306, drives the second cross plate 405 to move through the first trapezoidal plate 2, drives the threaded rod 403 to move to the position of the L-shaped plate 402 through the second cross plate 405, rotates the handle 404, drives the threaded rod 403 to rotate through the handle 404, drives the second cross plate 405 to move downwards through the L-shaped plate 402 through the threaded rod 403, so that the first trapezoidal plate 2 is tightly attached to the upper part of the road and bridge body 1, then fixes the first trapezoidal plate 2 with the concrete column 305 through the second bolt 306, so that the fixing effect is improved, when the first trapezoidal plate 2 moves downwards, the first trapezoidal plate 2 can drive the convex baffle 406 to move, the convex baffle 406 extrudes the arc-shaped clamping plate 407, make arc splint 407 to the outside rotation, thereby stretch first spring 408, when the below lug department of convex baffle 406 enters into the arc wall department of arc splint 407, arc splint 407 supports convex baffle 406 tightly under the spring action of first spring 408, thereby make convex baffle 406 drive second trapezoidal plate 505 downstream through arc splint 407, second trapezoidal plate 505 drives T shaped plate 503 and removes, make T shaped plate 503 extrude second spring 504, thereby elasticity performance through second spring 504 can play the effect of shock attenuation buffering to first trapezoidal plate 2, and then improved the life of this device.
In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a road and bridge crack reinforced structure, includes road and bridge body (1) and first trapezoidal plate (2), the upper surface rigid coupling of road and bridge body (1) has first trapezoidal plate (2), the inside processing in top of first trapezoidal plate (2) has a plurality of recesses, its characterized in that: the road and bridge is characterized in that a fixing device (3) is installed inside the road and bridge body (1).
2. A road and bridge crack reinforcing structure as claimed in claim 1, wherein: the fixing device (3) comprises a mortar layer (301), a concrete layer (302), a first transverse plate (303), a first bolt (304), a concrete column (305) and a second bolt (306).
3. A road and bridge crack reinforcing structure as claimed in claim 2, wherein: mortar layer (301) links to each other with the inside of road and bridge body (1) is fixed, concrete layer (302) have been pour to the top on mortar layer (301), there are a plurality of first diaphragm (303) top on concrete layer (302) through a plurality of first bolt (304) threaded connection, the upper surface rigid coupling of first diaphragm (303) has concrete column (305), the upper surface of concrete column (305) laminates with the lower surface of first trapezoidal plate (2) mutually, concrete column (305) link to each other with first trapezoidal plate (2) screw thread through second bolt (306).
4. A road and bridge crack reinforcing structure as claimed in claim 2, wherein: the concrete column (305) and the first transverse plate (303) are arranged vertically.
5. A road and bridge crack reinforcing structure as claimed in claim 2, wherein: the inner side of the concrete column (305) is provided with a rotating device (4); the rotating device (4) comprises a rectangular block (401), an L-shaped plate (402), a threaded rod (403), a handle (404), a second transverse plate (405), a convex baffle (406), an arc-shaped clamping plate (407) and a first spring (408).
6. A road and bridge crack reinforcing structure as claimed in claim 5, wherein: the inner part of the rectangular block (401) is fixedly connected with the outer wall of a concrete column (305), an L-shaped plate (402) is fixedly connected to the inner side of the rectangular block (401), a threaded rod (403) is connected to the upper part of the inner part of the L-shaped plate (402) in a threaded manner, a handle (404) is fixedly connected to the upper outer wall of the threaded rod (403), a second transverse plate (405) is arranged above the handle (404), the second transverse plate (405) is rotatably connected with the upper outer wall of the threaded rod (403), the upper surface of the second transverse plate (405) is fixedly connected with the lower surface of a first trapezoidal plate (2), a plurality of convex baffle plates (406) are arranged on the inner side of the second transverse plate (405), the upper surface of each convex baffle plate (406) is fixedly connected with the lower surface of the first trapezoidal plate (2), and arc-shaped clamping plates (407) are respectively installed on the outer walls of the left side, the front end surface of the adjacent arc-shaped clamping plate (407) is in rotary connection with a first spring (408) through a rotating shaft.
7. A road and bridge crack reinforcing structure as claimed in claim 3, wherein: the adjacent arc-shaped clamping plates (407) are symmetrically distributed; the middle point of the handle (404) and the middle point of the threaded rod (403) are on the same vertical line.
8. A road and bridge crack reinforcing structure as claimed in claim 2, wherein: a propping device (5) is arranged above the concrete layer (302); the abutting device (5) comprises a box body (501), a support plate (502), a T-shaped plate (503), a second spring (504) and a second trapezoidal plate (505); the outer wall of the lower surface of the left box body (501) and the outer wall of the right box body (501) are fixedly connected with the upper surface of a concrete layer (302), an opening is formed in the inner portion of the upper surface of the box body (501), support plates (502) are fixedly connected with the outer walls of the left side and the right side of the box body (501), the outer walls of the lower surface of the support plates (502) are fixedly connected with the upper surface of the concrete layer (302), T-shaped plates (503) are installed above the inner portion of the box body (501), the lower portion and the middle outer wall of each T-shaped plate (503) are in clearance fit with the inner wall and the outer wall of the opening of the box body (501) respectively, a second spring (504) is installed below the inner portion of the box body (501), the outer wall of the second spring (504) is in clearance fit with the inner wall of the box body (501), the outer walls of the upper portion and the lower portion of the second spring (, the lower surface of the second trapezoidal plate (505) is fixedly connected with the upper surface of the T-shaped plate (503), and the second trapezoidal plate (505) is rotatably connected with the arc-shaped clamping plate (407) through a rotating shaft.
9. A road and bridge crack reinforcing structure as claimed in claim 8, wherein: the length dimension of the lower part of the T-shaped plate (503) is larger than the length dimension of the opening at the upper part of the box body (501).
10. A road and bridge crack reinforcing structure as claimed in claim 8, wherein: the second trapezoidal plate (505) and the first trapezoidal plate (2) are arranged in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011326705.4A CN112376446A (en) | 2020-11-23 | 2020-11-23 | Road and bridge crack reinforced structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011326705.4A CN112376446A (en) | 2020-11-23 | 2020-11-23 | Road and bridge crack reinforced structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112376446A true CN112376446A (en) | 2021-02-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011326705.4A Withdrawn CN112376446A (en) | 2020-11-23 | 2020-11-23 | Road and bridge crack reinforced structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN112376446A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011179197A (en) * | 2010-02-26 | 2011-09-15 | Ube Nitto Kasei Co Ltd | Implement for fixing net for preventing exfoliation of concrete |
| CN206318225U (en) * | 2016-12-01 | 2017-07-11 | 谷金明 | A kind of bottle packing case for being easy to damping |
| CN207891756U (en) * | 2017-12-14 | 2018-09-21 | 姜祯 | A kind of road and bridge crack reparation telescopic device |
| CN210507176U (en) * | 2019-06-14 | 2020-05-12 | 张军政 | Road and bridge crack reinforced structure |
| CN111443780A (en) * | 2020-03-27 | 2020-07-24 | 深圳技术大学 | Hard disk installation device with protection function for video data storage |
| CN211646044U (en) * | 2019-12-31 | 2020-10-09 | 李亮 | Road and bridge crack reinforced structure |
| CN211646040U (en) * | 2019-11-23 | 2020-10-09 | 榆林市天元路业有限公司 | Crack reinforcing apparatus for road and bridge |
-
2020
- 2020-11-23 CN CN202011326705.4A patent/CN112376446A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011179197A (en) * | 2010-02-26 | 2011-09-15 | Ube Nitto Kasei Co Ltd | Implement for fixing net for preventing exfoliation of concrete |
| CN206318225U (en) * | 2016-12-01 | 2017-07-11 | 谷金明 | A kind of bottle packing case for being easy to damping |
| CN207891756U (en) * | 2017-12-14 | 2018-09-21 | 姜祯 | A kind of road and bridge crack reparation telescopic device |
| CN210507176U (en) * | 2019-06-14 | 2020-05-12 | 张军政 | Road and bridge crack reinforced structure |
| CN211646040U (en) * | 2019-11-23 | 2020-10-09 | 榆林市天元路业有限公司 | Crack reinforcing apparatus for road and bridge |
| CN211646044U (en) * | 2019-12-31 | 2020-10-09 | 李亮 | Road and bridge crack reinforced structure |
| CN111443780A (en) * | 2020-03-27 | 2020-07-24 | 深圳技术大学 | Hard disk installation device with protection function for video data storage |
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Application publication date: 20210219 |
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