Mechanical warning device for road night risk identification

Abstract

The present application relates to the technical field of road warning, in particular to a mechanical warning device for road night risk identification, which comprises an induction assembly, a trigger assembly and a warning assembly; the induction assembly comprises a pre-tightening steel rope, a load induction piece is arranged on the pre-tightening steel rope, the load induction piece is connected with a pre-buried induction piece, and the pre-buried induction piece is arranged in a bridge or a slope; the trigger assembly comprises a trigger rope; one end of the trigger rope is connected with the pre-tightening steel rope, and the other end is connected with a release pin; the warning assembly comprises a stand column, a first warning board is fixedly installed on the stand column; further comprising a second warning board, the bottom of the second warning board is hinged with the bottom of the first warning board, and different information is displayed. After a collapse or subsidence accident occurs, the pre-tightening steel rope at the induction contact point is subjected to large displacement to generate tension, and the tension is further transmitted to the release pin through the trigger rope, after the release pin is pulled out, the folded signboard is unfolded, and a no-passing traffic sign is displayed to provide warning information for vehicles behind.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of road warning, in particular to a mechanical warning device for road night risk identification. BACKGROUND

[0002] In recent years, a large number of highway collapse and subsidence events have occurred in China, causing a large number of casualties and huge property losses, and exposing the deficiency of the detection and warning ability of the related warning device for the sudden events on the current highway major sudden events. For the collapse and subsidence accidents of the important structures (bridge, tunnel entrance, etc.) and high-risk slopes of the ordinary highway dangerous section at night, warning information needs to be sent to the vehicles driving behind to provide the last safety insurance for the vehicles driving close to the major disaster site, so as to avoid major casualties.

[0003] At present, after the collapse and subsidence accidents of the important structures (bridge, tunnel entrance, etc.) and high-risk slopes of the ordinary highway dangerous section at night, the vehicles driving at night are easy to cause secondary accidents after the collapse and subsidence accidents, and the existing warning device usually needs power supply for image recognition or uses sensors for risk identification, which has requirements for the power supply environment and temperature. SUMMARY

[0004] The purpose of the present application is to provide a mechanical warning device for road night risk identification, which can immediately send warning information to the vehicles driving behind after the collapse and subsidence accidents of the important structures (bridge, tunnel entrance, etc.) and high-risk slopes of the ordinary highway dangerous section at night, provide the last safety insurance for the vehicles driving close to the major disaster site, avoid major casualties, and does not depend on the power supply environment and temperature conditions.

[0005] To solve the above technical problems, the technical scheme adopted by the present application is as follows:

[0006] A mechanical warning device for road night risk identification, comprising a sensing assembly, a triggering assembly and a warning assembly; the sensing assembly comprises a pre-tightening steel rope, a load sensing piece is arranged on the pre-tightening steel rope, the load sensing piece is connected with a pre-buried sensing piece, and the pre-buried sensing piece is arranged in a bridge or a slope; the triggering assembly comprises a triggering rope; one end of the triggering rope is connected to the pre-tightening steel rope, and the other end is connected with a release pin; the warning assembly comprises a stand, a first warning board is fixedly installed on the stand; a second warning board is further included, the bottom of the second warning board is hinged to the bottom of the first warning board, different information is displayed through the folding and unfolding of the second warning board; when the second warning board is unfolded, the first warning board and the second warning board jointly display road collapse warning information; a plug rod is arranged on the second warning board, the plug rod passes through the first warning board and is connected with the release pin, the release pin limits the plug rod and further limits the unfolding of the second warning board, and when the release pin is pulled, the second warning board is unfolded.

[0007] Further, the insertion rod is provided with a spring, and the spring is located between the first warning board and the second warning board.

[0008] Further, a waterproof cover plate is installed on the top of the first warning board, and the waterproof cover plate covers the second warning board and the spring in a normal state.

[0009] Further, the pre-tightening steel ropes are provided with a plurality of pre-tightening steel ropes, each of which is connected with a load sensing element and a pre-buried sensing element, covers different sections of the slope or bridge, and is connected with a warning assembly similar to the section of the road or bridge covered by each pre-tightening steel rope.

[0010] Further, a steering wheel is further included, and the trigger rope passes through the steering wheel, and the steering wheel adjusts the force transmission path of the trigger rope.

[0011] Further, a buffer pad is installed at the lower end of the column, and the buffer pad is used to buffer the unfolded second warning board, so as to reduce the impact of the second warning board falling on the column when the second warning board is unfolded.

[0012] Further, when the second warning board is folded, the distance information of the road is displayed.

[0013] A mechanical warning device for night risk identification of a road comprises a plurality of warning assemblies, and the warning assemblies are arranged along the road or bridge and are denoted as J1, J2, J3, …; each warning assembly comprises a column, and a first warning board is fixedly installed on the column; a second warning board is further included, and the bottom of the second warning board is hingedly connected with the bottom of the first warning board; different information is displayed by folding and unfolding of the second warning board; when the second warning board is unfolded, the first warning board and the second warning board jointly display road collapse warning information; an insertion rod is arranged on the second warning board; a sensing assembly is further included, and different numbers of sensing assemblies are arranged according to the road or bridge; a single sensing assembly is used for an ordinary road and a one-span bridge; one or more sensing assemblies are used for a multi-span bridge according to the length of the bridge, and it is ensured that a plurality of warning assemblies are arranged on the multi-span bridge; the plurality of warning assemblies on the multi-span bridge divide the multi-span bridge into a plurality of sections, and one sensing assembly is used to cover the whole section, another sensing assembly is offset by one section to cover, and a further sensing assembly is offset by one section to cover, and the like; the sensing assembly comprises a pre-tightening steel rope, a load sensing element is arranged on the pre-tightening steel rope, the load sensing element is connected with a pre-buried sensing element, and the pre-buried sensing element is arranged in the bridge or slope; a trigger assembly is further included, and the trigger assembly is used to individually connect the warning assemblies in the coverage range; the trigger assembly comprises a trigger rope; one end of the trigger rope is connected to the pre-tightening steel rope, and the other end of the trigger rope is connected with a release pin; the insertion rod passes through the first warning board and is connected with the release pin, the release pin limits the insertion rod and further limits the unfolding of the second warning board, and when the release pin is pulled, the second warning board is unfolded.

[0014] Preferably, the interval distance of the warning component is 100m.

[0015] Preferably, when the total length of the multi-span bridge is not more than 100m, one sensing component is used; when the total length of the multi-span bridge is more than 100m, multiple sensing components are used.

[0016] Compared with the prior art, the present application has the following advantages and beneficial effects:

[0017] 1. Normal and stable operation in outdoor extreme environment: The device is composed of sensing components, triggering components and warning components, and can assist in night risk identification and warning. The device has simple structure, clear force transmission path, and strong adaptability to outdoor extreme conditions such as high altitude, high temperature, low solar intensity, heavy rainfall, snowstorm and lightning strike.

[0018] 2. No power supply is required: The device does not require power supply, and only relies on the tension of the pre-tightened steel rope to transmit force to the release pin to trigger the warning component.

[0019] 3. The device can also work continuously and normally at night. After the second warning sign is triggered, it can continue to play a warning effect and work continuously for 24 hours.

[0020] 4. Low cost, high reliability, maintenance-free and long service life: The device only needs to customize pre-embedded sensing parts, pre-tightened steel ropes, second warning signs, release pins, columns and steering wheels. The process is simple, easy to manufacture, and the raw materials are widely available. Most of them are finished products and do not need to be customized, so the product cost is low. The device uses mechanical sensing, triggering and warning, which is more reliable than electrical products. After good corrosion protection, it has the characteristics of maintenance-free and long service life.

[0021] 5. Meet the requirements of identifying night risks: The first warning sign and the second warning sign use strong reflective materials, and multiple warning components are arranged, so that the driver can more easily receive warning information and brake urgently when driving at night. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 Safety distance diagram for braking of small cars.

[0023] Figure 2 Relationship diagram of braking distance for small cars at different speeds.

[0024] Figure 3 Bridge disaster point sensing pre-embedded part layout diagram (one-span bridge).

[0025] Figure 4 Layout diagram of one sensing unit for one-span bridge.

[0026] Figure 5 Layout diagram of one sensing unit for multi-span bridge.

[0027] Figure 6 The schematic diagram of the arrangement of multiple induction units for a multi-span bridge.

[0028] Figure 7 The schematic diagram of the arrangement of one induction unit for a slope.

[0029] Figure 8 The schematic diagram of the arrangement of multiple induction units for a slope.

[0030] Figure 9 The schematic diagram of the arrangement of induction embedded parts and pre-tightening steel ropes for a bridge outside a tunnel entrance.

[0031] Figure 10 The schematic diagram of the arrangement of induction embedded parts and pre-tightening steel ropes for a road outside a tunnel entrance.

[0032] Figure 11 The schematic diagram of a force transmission path.

[0033] Figure 12 The general state diagram of a warning assembly.

[0034] Figure 13 The emergency state diagram of a warning assembly.

[0035] Figure 14 The enlarged view of A in Figure 12 .

[0036] Icon explanation: 1 - stand, 2 - first warning board, 3 - second warning board, 4 - insertion rod, 5 - spring, 6 - release pin, 7 - buffer pad. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application, so as to have a further understanding of the concept of the present application, the solved technical problems, the technical features constituting the technical solutions and the brought technical effects.

[0038] The road in the title of the present application is a broad concept in a higher level, including both side slopes, bridges and tunnels, etc.

[0039] As shown in Figure 3 , Figure 14 , a road night risk identification and warning device, comprising an induction assembly, a triggering assembly and a warning assembly; the induction assembly comprises a pre-tightening steel rope, a load induction part is arranged on the pre-tightening steel rope, the load induction part is connected with an embedded induction part, and the embedded induction part is arranged in a bridge or a slope; the triggering assembly comprises a triggering rope; one end of the triggering rope is connected to the pre-tightening steel rope, and the other end is connected with a release pin 6.

[0040] As shown in Figures 12-14 , a road night risk identification and warning device, comprising an induction assembly, a triggering assembly and a warning assembly; the induction assembly comprises a pre-tightening steel rope, a load induction part is arranged on the pre-tightening steel rope, the load induction part is connected with an embedded induction part, and the embedded induction part is arranged in a bridge or a slope; the triggering assembly comprises a triggering rope; one end of the triggering rope is connected to the pre-tightening steel rope, and the other end is connected with a release pin 6.As shown, the warning assembly comprises a column 1, a first warning board 2 is fixedly installed on the column 1; further comprising a second warning board 3, the bottom of the second warning board 3 is hinged to the bottom of the first warning board 2, different information is displayed by folding and unfolding of the second warning board 3; when the second warning board 3 is unfolded, the first warning board 2 and the second warning board 3 jointly display the road collapse warning information; the second warning board 3 is provided with a plug rod 4, the plug rod 4 passes through the first warning board 2 and is connected with the release pin 6, the release pin 6 limits the plug rod 4 and further limits the unfolding of the second warning board 3, when the release pin 6 is pulled, the second warning board 3 is unfolded.

[0041] In view of the characteristics of large displacement of the road, bridge, tunnel entrance and high-risk slope when collapse and subsidence occurs, the pre-tightening steel wire generates tension under the action of large displacement at the set sensing contact point, and the tension is further transmitted to the release pin 6 through the trigger rope, after the release pin 6 is pulled out, the folded signboard is unfolded, and the traffic prohibition sign with the reflective characteristic is displayed, providing warning information for the rear vehicles. In the warning assembly, the bottom of the first warning board 2 and the second warning board 3 is connected by a hinge, the second warning board 3 is provided with a plug rod 4, the plug rod 4 passes through the first warning board 2 and is connected with the release pin 6, the release pin 6 limits the plug rod 4 and further limits the unfolding of the second warning board 3, the state of the release pin 6 limiting the second warning board 3 is the normal state. After the collapse of the slope and the bridge, the sensing pre-embedded part is driven to have large displacement, the load sensing part is pulled off, the pre-tightening steel wire is retracted, the trigger rope is pulled, the release pin 6 is pulled out, and then the second warning board 3 is quickly unfolded under the action of the self-weight, the distance signboard becomes a warning board, and it is in an emergency state. The warning signal has a short delay time, once the disaster occurs, the warning board is quickly unfolded, the night vehicle light is reflected, and the driver is prompted to emergency brake. The device can provide emergency prompt for the driver, effectively cope with the sudden situation, and does not need to set power supply, and is quickly and automatically triggered.

[0042] Further, the plug rod 4 is provided with a spring 5, and the spring 5 is located between the first warning board 2 and the second warning board 3. The spring 5 provides an emergency state pushing force for the second warning board 3, so that the second warning board 3 can be unfolded more quickly.

[0043] Further, a waterproof cover plate is installed at the top of the first warning board 2, and the waterproof cover plate covers the second warning board 3 and the spring 5 in the normal state. In order to prevent the spring 5 and the release pin 6 device from being rusted by rainwater, the waterproof cover plate is designed to shield.

[0044] Further, the pre-tightening steel wire is provided with a plurality of pre-tightening steel wires, each pre-tightening steel wire is connected with the load sensing part and the pre-embedded sensing part, covers different sections of the road or the bridge, and each pre-tightening steel wire is connected with the similar warning assembly covering the section of the slope or the bridge. The plurality of pre-tightening steel wires cover different sections, trigger the warning assemblies of different sections when collapse occurs in different sections, and achieve a more accurate warning effect.

[0045] As Figure 11 Further, further comprising a steering wheel, the trigger rope around the steering wheel, the steering wheel adjusts the force transmission path of the trigger rope.

[0046] Further, the lower end of the column 1 is provided with a buffer pad 7, which is used to buffer the unfolded second warning sign 3, and can reduce the impact of the second warning sign 3 falling on the column 1 when it is unfolded.

[0047] Further, the second warning sign 3 is folded to show the distance information of the road.

[0048] As Figures 4-10 shown, an automatic warning device for bridge and road night risk identification is provided, which is specifically connected in different road conditions:

[0049] It comprises a plurality of warning assemblies, which are arranged along the road or bridge and are denoted as J1, J2, J3, …;

[0050] The warning assembly comprises a column 1, a first warning sign 2 is fixedly installed on the column 1; it further comprises a second warning sign 3, the bottom of the second warning sign 3 is hingedly connected with the bottom of the first warning sign 2, different information is displayed by folding and unfolding the second warning sign 3; when the second warning sign 3 is unfolded, the first warning sign 2 and the second warning sign 3 jointly display the road collapse warning information; a plug rod 4 is arranged on the second warning sign 3;

[0051] It further comprises a sensing assembly, different numbers of sensing assemblies are arranged according to the road or bridge conditions, a single sensing assembly is used for ordinary roads and a single-span bridge; one or more sensing assemblies are used for a multi-span bridge according to the length of the bridge, and it is ensured that a plurality of warning assemblies are arranged on the multi-span bridge, the plurality of warning assemblies on the multi-span bridge divide the multi-span bridge into a plurality of sections, one sensing assembly is used to cover the whole section, another sensing assembly is offset by one section to cover, and another sensing assembly is offset by another section to cover, and so on.

[0052] The sensing assembly comprises a pre-tightening steel rope, a load sensing piece is arranged on the pre-tightening steel rope, and a pre-buried sensing piece is connected with the load sensing piece and arranged in the bridge or slope.

[0053] It further comprises a triggering assembly, each warning assembly is connected with the warning assemblies in the coverage range by the triggering assembly.

[0054] The triggering assembly comprises a trigger rope; one end of the trigger rope is connected to the pre-tightening steel rope, and the other end is connected with a release pin 6; the plug rod 4 passes through the first warning sign 2 and is connected with the release pin 6, the release pin 6 limits the plug rod 4 and further limits the unfolding of the second warning sign 3, when the release pin 6 is pulled, the second warning sign 3 is unfolded.

[0055] Definition of sensing unit: The sensing unit in the sensing assembly refers to the disaster location sensing area, and the length of the sensing unit corresponds to the length of the section in the above.

[0056] Since the span of small and medium span bridges is usually not more than 50m, the sensing unit is divided as follows:

[0057] 1) One span bridge forms one sensing unit, and when only one span bridge connects the road, it only constitutes one sensing unit;

[0058] 2) Multiple span bridges form one sensing unit, and when the total length of the multiple span bridges connecting the road is short, one sensing unit can also be formed by multiple span bridges;

[0059] 3) Multiple span bridges form multiple sensing units, and when the total length of the multiple span bridges connecting the road is long, multiple sensing units can be divided.

[0060] When there is only one sensing unit, the sensing assembly only needs one pre-tightening steel wire; when there are multiple sensing units, multiple pre-tightening steel wires need to be connected in parallel. The specific triggering process is as follows:

[0061] 1) In one sensing unit, when any one span bridge collapses, it drives the sensing embedded part to have a large displacement, breaks the load sensing part, retracts the pre-tightening steel wire, pulls the triggering rope, and pulls out the release pin 6, triggering the warning assembly about 200m, 100m behind the accident.

[0062] 2) In multiple sensing units, when any one span bridge in sensing unit 1 collapses, it will directly trigger the warning assemblies J1, J2, and J3; when any one span bridge in sensing unit 2 collapses, it will directly trigger the warning assemblies J1-J4; when any one span bridge in sensing unit 3 collapses, it will directly trigger the warning assemblies J2-J5, and it may also trigger J1 passively; the triggering of the warning assemblies in other sensing units can be inferred in the same way.

[0063] As shown in Figure 1 , Figure 2 , preferably, the interval distance of the warning assembly is 100m. For ordinary highways, the speed is usually not more than 80km / h, and the longitudinal safety distance of small cars, large and medium-sized passenger cars and trucks can be taken as 100m. That is, the distance from the disaster accident site to the warning device to remind the driver to start braking should not be less than 100m. Considering the influence of actual operation process, such as overspeed and heavy rain, the farthest warning distance is set to 200m and 100m.

[0064] Preferably, when the total length of the multiple span bridges is not more than 100m, one sensing assembly is used; when the total length of the multiple span bridges is greater than 100m, multiple sensing assemblies are used.

[0065] For the ordinary road with slope, in order to improve the slope stability, the anchoring structure is usually provided, when the road slope subsides, the anchoring structure slides simultaneously, therefore the sensing steel rope is connected between the sensing component of the road disaster and the anchoring point (i.e. the sensing point in the figure), if the sensing point is inconvenient to operate, the pre-buried steel bar can be re-punched into the slope to become a new sensing point. The warning component is installed on the outside of the road railing.

[0066] The application scenario of the present application is:

[0067] 1. For the collapsed bridge at night caused by flood scouring, debris flow, rockfall, ship collision, etc., the device can provide warning for the vehicles driving behind, reducing personnel casualties.

[0068] 2. For the subsided road at night caused by landslide, etc., the device can provide warning for the vehicles driving behind, reducing personnel casualties.

[0069] 3. It can also be applied to the warning after the collapse or subsidence of the bridge and road in the transition area of bridge and tunnel.

[0070] The advantages of the present application are:

[0071] 1. Normal and stable operation in outdoor extreme environment: the device is composed of sensing components, triggering components and warning components, etc., assisting night risk identification and warning, with simple structure, clear force transmission path, strong adaptability to outdoor extreme conditions such as high altitude, high temperature, low solar intensity, heavy rainfall, snowstorm, lightning strike, etc.

[0072] 2. No power supply: the device does not need power supply, only relying on the pre-tightening of the steel rope after being pulled, the force is transmitted to the release pin 6 to trigger the warning component.

[0073] 3. It can also work continuously and normally at night, the second warning sign 3 can continue to play a warning effect after being triggered, working 24 hours without interruption.

[0074] 4. Low cost, high reliability, maintenance-free, long service life: the device only needs to customize pre-buried sensing parts, pre-tightening steel rope, second warning sign 3, release pin 6, stand 1 and steering wheel, etc. The process is simple, easy to make, and the raw materials are widely available, and most of them have finished parts that do not need to be customized, with low product cost. The mechanical sensing, triggering and warning are more reliable than electrical products, and after good corrosion protection, they have the characteristics of maintenance-free and long service life.

[0075] 5. Meet the requirements of identifying night risks: the first warning sign 2 and the second warning sign 3 use strong reflective materials, and multiple warning components are arranged, so that the driver can receive warning information more easily when driving at night and brake urgently.

[0076] Force transmission path design scheme:

[0077] Based on the preferred 100m warning distance in the technical solution, the warning assembly is arranged at the positions 100m and 200m away from each sensing unit in the driving direction of the vehicle, and the steering wheel is pre-buried at the position, so that the force transmission path between the pre-tightening steel rope, the trigger rope and the release pin 6 is clear. Through test and test, the critical breaking load of the load sensing part and the pre-tightening force of the steel rope are optimized, the reasonable structure parameters are determined, and it is ensured that the load sensing part is broken after the disaster. The trigger rope is fixed with the pre-tightening steel rope, and the trigger rope is pulled out of the release pin 6 by using the retracting force after the load sensing part is broken and the pulling force of the bridge collapse or the road subsidence, bypassing the steering wheel, to avoid the damage of the steel rope pulling force to the warning sign. The influence of the size parameters of the release pin 6 on the pulling force is compared to ensure that the trigger rope can smoothly pull out the release pin 6.

[0078] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand; it can still modify the technical solutions described in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A mechanical warning device for identifying nighttime road risks, characterized by: It includes a sensing component, a trigger component and a warning component; the sensing component includes a pre-tensioned steel rope, on which a load sensing component is provided, and the load sensing component is connected to a pre-embedded sensing component, which is arranged in the bridge or slope; The trigger assembly includes a trigger rope; one end of the trigger rope is connected to the pre-tensioned steel rope, and the other end is connected to a release pin; The warning assembly includes a column on which a first warning sign is fixedly mounted; and a second warning sign, the bottom of which is hinged to the bottom of the first warning sign. Different information is displayed by folding and unfolding the second warning sign. When the second warning sign is unfolded, the first warning sign and the second warning sign jointly display the road collapse warning information. The second warning sign is provided with an insertion rod, which passes through the first warning sign and is connected to the release pin. The release pin restricts the insertion rod and thus restricts the deployment of the second warning sign. When the release pin is pulled, the second warning sign is deployed.

2. The mechanical warning device for nighttime road risk identification according to claim 1, characterized in that: The outer sleeve of the insertion rod is provided with a spring, and the spring is located between the first warning sign and the second warning sign.

3. The mechanical warning device for nighttime road risk identification according to claim 1, characterized in that: A waterproof cover is installed on the top of the first warning sign, and the waterproof cover covers the second warning sign and the spring in a normal state.

4. The mechanical warning device for nighttime road risk identification according to claim 1, characterized in that: There are multiple pre-tensioning steel ropes, each of which covers different sections of the slope or bridge through the connected load sensing parts and embedded sensing parts. Each pre-tensioning steel rope is connected to a similar warning component covering the road or bridge section.

5. The mechanical warning device for nighttime road risk identification according to claim 1, characterized in that: It also includes a steering wheel, the trigger rope passes around the steering wheel, and the steering wheel adjusts the force transmission path of the trigger rope.

6. The mechanical warning device for nighttime road risk identification according to claim 1, characterized in that: A buffer block is installed at the lower end of the column, and the buffer block is used to buffer the unfolded second warning sign.

7. The mechanical warning device for nighttime road risk identification according to claim 1, characterized in that: When the second warning sign is folded, the distance information of the road is displayed.

8. A mechanical warning device for identifying nighttime road risks, characterized by: The system comprises a plurality of warning components, which are arranged along a road or bridge and are designated as J1, J2, J3, etc. The warning components include a column on which a first warning sign is fixedly mounted; a second warning sign, the bottom of which is hinged to the bottom of the first warning sign, and which displays different information by folding and unfolding the second warning sign; when the second warning sign is unfolded, the first warning sign and the second warning sign jointly display a road collapse warning message; and a plug is provided on the second warning sign. It also includes sensing components, with different numbers of sensing components set according to the road or bridge conditions. Ordinary roads and single-span bridges use a single sensing component; multi-span bridges use one or more sensing components based on the length of the bridge, and ensure that multiple warning components are set on the multi-span bridge. The multiple warning components on the multi-span bridge divide the multi-span bridge into multiple sections. One sensing component is used to cover the entire section, and another sensing component is offset by one section to cover it. The next sensing component is offset by another section to cover it, and so on. The sensing component includes a pre-tensioned steel rope, on which a load sensing part is provided, which is connected to a pre-embedded sensing part, and the pre-embedded sensing part is arranged in a bridge or a slope; it also includes a trigger component, and each warning component uses a trigger component to separately connect the warning components within the coverage area; the trigger component includes a trigger rope; one end of the trigger rope is connected to the pre-tensioned steel rope, and the other end is connected to a release pin; the insertion rod passes through the first warning sign and is connected to the release pin, and the release pin limits the insertion rod and thus limits the deployment of the second warning sign. When the release pin is pulled, the second warning sign is deployed.

9. The mechanical warning device for nighttime road risk identification according to claim 8, characterized in that: The warning components are set at an interval of 100m.

10. The mechanical warning device for nighttime road risk identification according to claim 8, characterized in that: When the total length of the multi-span bridge is no more than 100m, one sensing component is used; when the total length of the multi-span bridge is more than 100m, multiple sensing components are used.

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