Intelligent fence protection device for bridge engineering

By using a combination of support plates, railings, elevated frames and alarm mechanisms in the bridge protection device, the problem of inconvenient height adjustment in the prior art is solved, effective protection and safety improvement of vehicles and bridges is achieved, and interior vehicles are ensured. Safety of personnel.

CN222350421UInactive Publication Date: 2025-01-14NO 6 ENGINEERING CO LTD OF FHEC OF CCCC
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Patent Information

Application Number
CN202421099779.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-20
Publication Date
2025-01-14
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The existing bridge protection devices are not convenient to adjust height according to needs when used, resulting in the inability to effectively protect the vehicles and bridges when the vehicle speed is too fast, and pose a threat to the safety of personnel in the vehicle.

Method used

A smart fence protection device for bridge engineering is designed, using a combination of support plates, railings, elevated frames and alarm mechanisms. The laser rangefinder sensor and buzzer detects distant pedestrians or vehicles, and the elevated frames and connection mechanisms are used. Achieve height adjustment to enhance the stability and safety of the device.

Benefits of technology

The height of the protective device is adjusted as needed, the protection effect of vehicles and bridges is improved, the safety and stability of the device is enhanced, and the construction is reminded in front of the vehicle is reduced by alerting.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of bridge engineering equipment, in particular to an intelligent fence protection device for bridge engineering. Comprising a supporting plate, handrails are evenly distributed and fixed to the top of the supporting plate, a first connecting plate is fixed to the tops of the handrails, an alarm mechanism is installed at the top of the first connecting plate, the alarm mechanism comprises a protective cover, a second connecting plate, a supporting block, a buzzer and a laser range finder sensor, and the second connecting plate is slidably connected with the first connecting plate; a supporting block is fixed to the top of the second connecting plate, and a laser range finder sensor is fixed to one end in the supporting block. According to the intelligent fence protection device for bridge engineering, through cooperation of the supporting plates, the handrails, the heightening frames and the alarm mechanism, when the intelligent fence protection device is used, the heightening frames of different numbers can be assembled between the first connecting plate and the protection cover according to the height requirement; and meanwhile, the warning mechanism gives an alarm to pedestrians coming from the distance to remind front construction.
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Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering equipment, in particular to an intelligent fence protection device for bridge engineering. Background Art

[0002] Protective fences are mainly used for the protection and protection of personal safety and equipment facilities in residential areas, highways, commercial areas, public places, bridges and other occasions. Guardrails can be seen everywhere in people's lives. The price per meter of guardrails varies depending on the height. Guardrails are usually made of steel, such as: stainless steel, round steel pipes, square steel pipes or corrugated steel plates, iron wire, and the surface treatment process uses fully automatic electrostatic powder spraying (ie, plastic spraying) or painting. In recent years, aluminum alloy plug-in and assembled guardrails have also become more popular. The guardrail posts are fixed to the ground through expansion bolts.

[0003] The patent document with the announcement number (CN213086565U) discloses a bridge protection device for municipal engineering, including fence posts and a protection body, wherein the right side of the fence posts is welded to the left side of the wire fence, and the right side of the wire fence is welded to the left side of another fence post, and the inner sides of the two groups of fence posts are provided with mounting inner plates, and the front of the mounting inner plates is fixed with the protection body. The utility model solves the problem that the existing bridge protection measures for vehicles generally only have a protective net, which has a simple structure and poor safety protection effect. When the vehicle is traveling at a slow speed, it will also damage the vehicle when it collides with it, and it cannot protect the vehicle well. However, when the vehicle is traveling at an excessively fast speed, it will cause serious damage to the vehicle and the bridge fence, and even threaten the safety of the people in the vehicle. It can effectively protect the vehicle and reduce the impact force on the fence posts on the bridge, greatly improving the safety and practicality of the device;

[0004] When using the above technology, it was found that the following technical problems exist in the prior art: the existing protective device is not convenient for adjusting the height according to needs during use. For this reason, an intelligent fence protective device for bridge engineering is designed to provide another technical solution to the above technical problems. Utility Model Content

[0005] Based on this, it is necessary to provide an intelligent fence protection device for bridge engineering in response to the above technical problems, so as to solve the technical problem that the existing protection device is not convenient to adjust the height according to needs during use.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A smart fence protection device for bridge engineering, comprising a support plate, a railing evenly fixed on the top of the support plate, a first connecting plate fixed on the top of the railing, an alarm mechanism installed on the top of the first connecting plate, the alarm mechanism comprising a protective cover, a second connecting plate, a support block, a buzzer and a laser rangefinder sensor, the second connecting plate is slidably connected to the first connecting plate, a support block is fixed on the top of the second connecting plate, a laser rangefinder sensor is fixed at one end inside the support block, a buzzer is fixed at the other end inside the support block, and a protective cover is fixed on the top of the support block.

[0008] As a preferred embodiment of the intelligent fence protection device for bridge engineering provided by the utility model, an elevated frame is arranged between the first connecting plate and the second connecting plate, the top of the elevated frame is slidably connected to the second connecting plate, and the bottom of the elevated frame is slidably connected to the first connecting plate.

[0009] As a preferred embodiment of the intelligent fence protection device for bridge engineering provided by the utility model, translation sliding blocks are fixed at both ends of the bottom of the raising frame and the second connecting plate, and the second connecting plate and the raising frame, the second connecting plate and the first connecting plate, and the raising frame and the first connecting plate are all slidably connected through translation sliding blocks.

[0010] As a preferred embodiment of the intelligent fence protection device for bridge engineering provided by the utility model, a first connecting mechanism is installed inside the bottom end of the elevated frame, and a second connecting mechanism is installed inside the bottom end of the second connecting plate. The first connecting mechanism and the second connecting mechanism both include a clamping sliding block, a displacement drive motor, an adjusting gear and a displacement rack. Both ends of the bottom end of the second connecting plate are slidably connected with a clamping sliding block, a displacement drive motor is fixed inside the second connecting plate, and an adjusting gear is connected to the output end of the displacement drive motor. The top and bottom of the adjusting gear are meshed and connected with a displacement rack, and the end of the displacement rack away from the adjusting gear is fixed to the clamping sliding block.

[0011] As a preferred implementation of the intelligent fence protection device for bridge engineering provided by the utility model, an extrusion slope is provided on one side of the adjacent ends of the two clamping sliding blocks.

[0012] As a preferred embodiment of the intelligent fence protection device for bridge engineering provided by the utility model, the support plate is slidably connected to an assembly plate inside the support plate, and a positioning mechanism for connecting the support plate is installed inside the assembly plate, and the positioning mechanism includes a positioning block, a synchronous plate, an adjusting extrusion plate, an inclined plate and a push rod motor, the interiors of both ends of the assembly plate are slidably connected to positioning blocks, and the positioning blocks are slidably connected to the support plate, the adjacent sides of the two positioning blocks at the same end are fixed with synchronous plates, a compression spring is fixed between the two synchronous plates at the same end, the assembly plate is slidably connected to an adjusting extrusion plate, inclined plates are fixed on both sides of the two ends of the adjusting extrusion plate and at positions corresponding to the positioning blocks, and the inclined plate is slidably connected to the positioning block, and a push rod motor is fixed inside the assembly plate, and the push rod of the push rod motor is fixed to the adjusting extrusion plate.

[0013] It can be seen without a doubt that the above-mentioned technical solution of the present application can definitely solve the technical problem to be solved by the present application.

[0014] At the same time, through the above technical solutions, the utility model has at least the following beneficial effects:

[0015] The utility model provides an intelligent fence protection device for bridge engineering. Through the cooperation of a support plate, a railing, a heightening frame and an alarm mechanism, different numbers of heightening frames can be assembled between a first connecting plate and a protective cover according to height requirements when in use. At the same time, the alarm mechanism can be used to warn pedestrians coming from a distance to remind the construction ahead.

[0016] Through the cooperation of the clamping sliding block, the translation sliding block and the extrusion inclined surface, the second connecting plate and the first connecting plate or the heightening frame and the first connecting plate can be positioned after assembly, so that they can be more stable after assembly;

[0017] Through the cooperation of the assembly plate, the positioning block and the adjustment extrusion plate, when multiple protective devices are used at intervals, two adjacent support plates can be connected by sliding the assembly plate, and at the same time, the positioning block can move into the corresponding support plate to fix the two adjacent protective devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the protective device of the utility model after the height is increased;

[0021] Figure 3 It is a schematic diagram of the connection of multiple protective devices of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the utility model heightening frame;

[0023] Figure 5 This is a schematic diagram of the internal structure of the support plate of the utility model;

[0024] Figure 6 This is a schematic diagram of the structure of the clamping sliding block of the utility model;

[0025] Figure 7 It is a structural schematic diagram of the displacement rack of the utility model;

[0026] Figure 8 It is a schematic diagram of the internal structure of the assembly plate of the utility model.

[0027] In the figure: 1. support plate; 2. railing; 3. first connecting plate; 4. heightening frame; 5. protective cover; 6. assembly plate; 7. assembly groove; 8. second connecting plate; 9. support block; 10. buzzer; 11. laser rangefinder sensor; 12. clamping sliding block; 13. translation sliding block; 14. extrusion ramp; 15. displacement drive motor; 16. adjustment gear; 17. displacement rack; 18. positioning block; 19. synchronization plate; 20. adjustment extrusion plate; 21. tilting plate; 22. push rod motor. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0029] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0030] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] Embodiment 1

[0033] Reference Figure 1-Figure 8 , an intelligent fence protection device for bridge engineering, comprising a support plate 1, a railing 2 is evenly fixed on the top of the support plate 1, a first connecting plate 3 is fixed on the top of the railing 2, so that the support plates 1 can form a protective effect through the contact between the support plate 1 and the ground, an alarm mechanism is installed on the top of the first connecting plate 3, the alarm mechanism includes a protective cover 5, a second connecting plate 8, a supporting block 9, a buzzer 10 and a laser rangefinder sensor 11, the second connecting plate 8 is slidably connected to the first connecting plate 3, a supporting block 9 is fixed on the top of the second connecting plate 8, and one end of the support block 9 is fixed There is a laser rangefinder sensor 11, so that the laser rangefinder sensor 11 can detect pedestrians or vehicles at a long distance. The model of the laser rangefinder sensor 11 is SW-LDS50A. A buzzer 10 is fixed at the other end of the support block 9, so that after the laser rangefinder sensor 11 detects an object, the buzzer 10 emits an alarm to remind personnel to work ahead. A protective cover 5 is fixed on the top of the support block 9, so that the top of the support block 9 is protected by the protective cover 5 to prevent debris from falling or rain from damaging the buzzer 10 and the laser rangefinder sensor 11;

[0034] In this embodiment, a signal controller may be fixed inside the support block 9 , so as to allow the signal controller to directly control the operation of the buzzer 10 after receiving the signal from the laser rangefinder sensor 11 .

[0035] An elevating frame 4 is provided between the first connecting plate 3 and the second connecting plate 8, so that different heights of the protective cover 5 can be adjusted by different numbers of elevating frames 4, the top of the elevating frame 4 is slidably connected to the second connecting plate 8, and the bottom of the elevating frame 4 is slidably connected to the first connecting plate 3, so that the elevating frame 4 can be installed between the first connecting plate 3 and the second connecting plate 8 by translation;

[0036] Both ends of the bottom of the raising frame 4 and the second connecting plate 8 are fixed with translation sliding blocks 13, and the second connecting plate 8 and the raising frame 4, the second connecting plate 8 and the first connecting plate 3, and the raising frame 4 and the first connecting plate 3 are all slidably connected through the translation sliding blocks 13, so that the second connecting plate 8 can be translationally slidably installed on the top of the first connecting plate 3 through the corresponding translation sliding blocks 13, or the raising frame 4 can be translationally slidably installed between the raising frame 4 and the second connecting plate 8 through the corresponding translation sliding blocks 13; a first connecting mechanism is installed inside the bottom end of the raising frame 4, and a second connecting mechanism is installed inside the bottom end of the second connecting plate 8, so that when the second connecting plate 8 and the first connecting plate 3 are assembled, the position of the raising frame 4 and the first connecting plate 3 is fixed through the first connecting mechanism, and the position of the second connecting plate 8 and the raising frame 4 is fixed through the second connecting mechanism;

[0037] The first connecting mechanism and the second connecting mechanism both include a clamping sliding block 12, a displacement driving motor 15, an adjusting gear 16 and a displacement rack 17. Both ends of the bottom end of the second connecting plate 8 are slidably connected with the clamping sliding block 12, and both ends of the bottom end of the heightening frame 4 are also slidably connected with the clamping sliding block 12. The displacement driving motor 15 is fixed inside the second connecting plate 8, and the displacement driving motor 15 is also fixed inside the heightening frame 4. The output end of the displacement driving motor 15 is connected with the adjusting gear 16. The top and bottom of the adjusting gear 16 are meshed and connected with the displacement rack 17. The end of the displacement rack 17 away from the adjusting gear 16 is fixed to the clamping sliding block 12, so that the rotation of the adjusting gear 16 causes the two displacement racks 17 to move in the opposite direction, driving the two clamping sliding blocks 12 to move in the opposite direction. An extrusion slope 14 is provided on one side of the adjacent end of the two clamping sliding blocks 12, so that the clamping sliding block 12 can easily enter the first connecting plate 3 or the top of the heightening frame 4 that is slidably connected;

[0038] In this embodiment, assembly grooves 7 are provided inside the first connecting plate 3 and the second connecting plate 8 at positions corresponding to the clamping sliding block 12 , so that the clamping sliding block 12 can enter the assembly grooves 7 when moving.

[0039] In this embodiment, a storage battery may be fixed inside the support plate 1 to provide power to the electrical equipment in the utility model.

[0040] The use process of the intelligent fence protection device for bridge engineering provided by the utility model is as follows: when in use, first select whether to add the heightening frame 4 according to the needs, when the heightening frame 4 is not needed to be added for raising, place the alarm mechanism on the top of the first connecting plate 3, and at the same time, let the second connecting plate 8 in the alarm mechanism be connected with the first connecting plate 3 by translation and sliding through the corresponding translation sliding block 13, at this time, the second connecting plate 8 can only be separated from the first connecting plate 3 by translation and sliding, and then the second connecting mechanism inside the second connecting plate 8 works, so that the adjusting gear 16 drives the two displacement racks 17 to move in the opposite direction. The displacement rack 17 drives the corresponding clamping sliding block 12 to move, and after the clamping sliding block 12 enters the first connecting plate 3 of sliding connection, the two clamping sliding blocks 12 move closer to each other, so that the clamping sliding block 12 enters the inside of the assembly groove 7 through the extrusion slope 14. At this time, the two clamping sliding blocks 12 move closer to each other, and then are firmly installed on the top of the first connecting plate 3. Then, the laser rangefinder sensor 11 is used to detect pedestrians or vehicles coming from a long distance. When it is detected that it moves to the set threshold distance, the buzzer 10 is used to prompt the construction ahead by emitting a buzzer alarm sound.

[0041] When it is necessary to add an elevated frame 4 between the first connecting plate 3 and the second connecting plate 8, the top of the elevated frame 4 is assembled with the second connecting plate 8 by translational sliding, and the bottom of the elevated frame 4 is assembled with the first connecting plate 3 by translational sliding. After the elevated frame 4 is installed between the first connecting plate 3 and the second connecting plate 8, the first connecting mechanism on the elevated frame 4 is operated so that the elevated frame 4 and the first connecting plate 3 are connected and fixed by the corresponding clamping sliding blocks 12, and the second connecting mechanism on the second connecting plate 8 is operated so that the second connecting plate 8 and the elevated frame 4 are connected and fixed by the corresponding clamping sliding blocks 12.

[0042] Embodiment 2

[0043] Reference Figure 3 and Figure 8 , based on the above-mentioned embodiment 1, an intelligent fence protection device for bridge engineering is disclosed, the support plate 1 is internally slidably connected with an assembly plate 6, so that multiple protection devices can be connected adjacently through the assembly plate 6, and at the same time, the assembly plate 6 and the support plate 1 can only be assembled and disengaged by translational sliding, and a positioning mechanism for connecting the support plate 1 is installed inside the assembly plate 6, and the positioning mechanism includes a positioning block 18, a synchronization plate 19, an adjustment extrusion plate 20, an inclined plate 21 and a push rod motor 22, and the interiors of both ends of the assembly plate 6 are slidably connected with positioning blocks 18, and the positioning blocks 18 are slidably connected to the support plate 1, so that when the assembly plate 6 is inside the support plate 1, the positioning blocks 18 extend out of the assembly plate 6 by sliding into the interior of the support plate 1, and the assembly between the assembly plate 6 and the support plate 1 is stably fixed;

[0044] A synchronous plate 19 is fixed on the adjacent side of the two positioning blocks 18 at the same end, and a compression spring is fixed between the two synchronous plates 19 at the same end, so that after the two synchronous plates 19 move close to each other, they are reset by the rebound of the compression spring after the external force disappears. The internal sliding connection of the assembly plate 6 is provided with an adjusting extrusion plate 20, so that the adjusting extrusion plate 20 can only slide in translation inside the assembly plate 6, and the positions of both sides of the two ends of the adjusting extrusion plate 20 and corresponding to the positioning blocks 18 are fixed with inclined plates 21, and the inclined plates 21 are slidably connected with the positioning blocks 18, so that the movement of the assembly plate 6 toward one end or the other end allows the inclined plates 21 to squeeze the corresponding synchronous plates 19, so that the synchronous plates 19 drive the positioning blocks 18 to move, so that the two positioning blocks 18 at the same end can move close to each other, and a push rod motor 22 is fixed inside the assembly plate 6, and the push rod of the push rod motor 22 is fixed to the adjusting extrusion plate 20, and then the adjusting extrusion plate 20 is driven to reciprocate through the work of the push rod motor 22.

[0045] The use process of the intelligent fence protection device for bridge engineering provided by the utility model is as follows: when two adjacent support plates 1 are connected and fixed, the push rod motor 22 is powered to work, driving the adjustment squeeze plate 20 to move in one direction. At this time, the movement of the adjustment squeeze plate 20 drives the two positioning blocks 18 at one end to move closer through the inclined plate 21, and at the same time, the approach of the two positioning blocks 18 at one end drives the compression spring to be compressed through the synchronous plate 19, and then one end of the assembly plate 6 is inserted into the support plate 1 with sliding connection, and then the push rod motor 22 is driven to work to drive the adjustment squeeze plate 20 to move in the other direction. At this time, the adjustment squeeze plate 20 The other end of the assembly plate 6 moves in the direction of the other end, and the two positioning blocks 18 at the other end are driven to move closer through the inclined plate 21. At the same time, the approach of the two positioning blocks 18 at the other end drives the compression spring to be compressed through the synchronous plate 19, and then the other end of the assembly plate 6 enters the inside of the slidingly connected support plate 1, and then the push rod motor 22 drives the adjustment extrusion plate 20 to return to its original position. At this time, the inclined plate 21 on the adjustment extrusion plate 20 does not squeeze the synchronous plates 19 at both ends, so that the positioning blocks 18 at both ends are reset by the corresponding compression spring rebound after the external force extrusion disappears, so that the positioning blocks 18 enter the inside of the slidingly connected support plate 1, and complete the connection and fixation between the two adjacent support plates 1.

[0046] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An intelligent fence protection device for bridge engineering, characterized in that: The invention comprises a support plate (1), a railing (2) is evenly fixed on the top of the support plate (1), a first connecting plate (3) is fixed on the top of the railing (2), an alarm mechanism is installed on the top of the first connecting plate (3), the alarm mechanism comprises a protective cover (5), a second connecting plate (8), a supporting block (9), a buzzer (10) and a laser rangefinder sensor (11), the second connecting plate (8) is slidably connected to the first connecting plate (3), a supporting block (9) is fixed on the top of the second connecting plate (8), a laser rangefinder sensor (11) is fixed at one end inside the supporting block (9), a buzzer (10) is fixed at the other end inside the supporting block (9), and a protective cover (5) is fixed on the top of the supporting block (9).

2. The intelligent fence protection device for bridge engineering according to claim 1 is characterized in that: An elevated frame (4) is provided between the first connecting plate (3) and the second connecting plate (8); the top of the elevated frame (4) is slidably connected to the second connecting plate (8), and the bottom of the elevated frame (4) is slidably connected to the first connecting plate (3).

3. The intelligent fence protection device for bridge engineering according to claim 2 is characterized in that: Both ends of the bottom of the height-enhancing frame (4) and the second connecting plate (8) are fixed with translation sliding blocks (13); the second connecting plate (8) and the height-enhancing frame (4), the second connecting plate (8) and the first connecting plate (3), and the height-enhancing frame (4) and the first connecting plate (3) are all slidably connected via the translation sliding blocks (13).

4. The intelligent fence protection device for bridge engineering according to claim 2 is characterized in that: A first connecting mechanism is installed inside the bottom end of the heightening frame (4), and a second connecting mechanism is installed inside the bottom end of the second connecting plate (8). The first connecting mechanism and the second connecting mechanism both comprise a clamping sliding block (12), a displacement driving motor (15), an adjusting gear (16) and a displacement rack (17). Both ends inside the bottom end of the second connecting plate (8) are slidably connected with the clamping sliding block (12). The displacement driving motor (15) is fixed inside the second connecting plate (8). The output end of the displacement driving motor (15) is connected with the adjusting gear (16). The top and bottom of the adjusting gear (16) are meshedly connected with the displacement rack (17). The end of the displacement rack (17) away from the adjusting gear (16) is fixed to the clamping sliding block (12).

5. The intelligent fence protection device for bridge engineering according to claim 4 is characterized in that: An extrusion slope (14) is provided on one side of the adjacent ends of the two clamping sliding blocks (12).

6. The intelligent fence protection device for bridge engineering according to claim 1 is characterized in that: The support plate (1) is slidably connected to an assembly plate (6) inside, and a positioning mechanism for connecting the support plate (1) is installed inside the assembly plate (6), and the positioning mechanism includes a positioning block (18), a synchronization plate (19), an adjustment and extrusion plate (20), a tilting plate (21) and a push rod motor (22). The interiors of both ends of the assembly plate (6) are slidably connected to positioning blocks (18), and the positioning blocks (18) are slidably connected to the support plate (1), and the two positioning blocks (18) on the same end are adjacent to each other on one side. A synchronous plate (19) is fixed to each of them, and a compression spring is fixed between the two synchronous plates (19) at the same end. An adjusting extrusion plate (20) is slidably connected inside the assembly plate (6). Inclined plates (21) are fixed on both sides of both ends of the adjusting extrusion plate (20) and at positions corresponding to the positioning block (18), and the inclined plates (21) are slidably connected to the positioning block (18). A push rod motor (22) is fixed inside the assembly plate (6), and a push rod of the push rod motor (22) is fixed to the adjusting extrusion plate (20).

Citation Information

Patent Citations

  • Bridge protection device for municipal engineering

    CN213086565U