A passive extendable refuge walkway end fall arrest device
By installing a passively extendable anti-fall device at the end of the escape lane, and using hydraulic cylinders and hydraulic pumps to provide cushioning, the problem of vehicles running out due to insufficient escape lane length was solved, thus achieving safe parking of vehicles and protection of personnel.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 四川乐西高速公路有限责任公司
- Filing Date
- 2025-08-14
- Publication Date
- 2026-08-04
AI Technical Summary
When the length and gradient of the emergency escape lane on a long, continuous downhill section are insufficient, out-of-control vehicles may not be able to stop completely, causing them to run out of the emergency escape lane and resulting in personal injury or serious vehicle damage.
A passively extendable fall arrestor is installed at the end of the escape lane. It includes a hollow interlayer and a slidingly connected extension support plate. Hydraulic cylinders and hydraulic pumps provide cushioning, and the extension support plate cushions and stops the vehicle. Combined with a fall arrestor rope collection device, it prevents people from falling.
It effectively prevents vehicles from running off the escape lane and crashing, avoids casualties, reduces the impact force between vehicles and the retaining wall, and ensures that vehicles stop safely.
Smart Images
Figure CN224591256U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of traffic safety facilities, and in particular relates to a passively extendable fall prevention device at the end of an emergency escape lane. Background Technology
[0002] When driving on a long, continuous downhill section of road, drivers must continuously apply the brakes to maintain a safe speed. Continuous braking causes the brake pads to overheat rapidly, quickly reducing braking effectiveness and potentially leading to brake system failure, thus causing a traffic accident. Providing an escape lane on one side of the road is an effective technical measure. To ensure that vehicles with brake failure stop safely before the end of the escape lane, its minimum length should be the minimum distance required for an out-of-control truck to stop. However, due to terrain limitations, some sections of road do not meet the required length and gradient for the escape lane. The braking ramp of the escape lane may not be able to completely stop an out-of-control vehicle, and some vehicles may still run off the end of the escape lane, causing injuries or fatalities. Conversely, if the end of the escape lane has a higher strength rating, it can easily result in severe vehicle damage and serious passenger injuries or fatalities. Utility Model Content
[0003] In view of the problems existing in the prior art, the purpose of this utility model is to provide a passively extendable fall prevention device for the end of a safety lane.
[0004] To solve the above problems, the present invention adopts the following technical solution: A passively extendable fall arresting device for the end of an escape lane includes a hollow interlayer formed below the surface of the escape lane and an extension support plate slidably connected within the hollow interlayer. The hollow interlayer is parallel to the surface of the escape lane and has an opening facing the end of the escape lane. The front end of the extension support plate is connected to the hollow interlayer, and the rear end extends out of the hollow interlayer. A limit block is provided below the opening of the hollow interlayer, and the top surface of the limit block is supported on the bottom surface of the extension support plate. A stop block is connected to the bottom of the front end of the extension support plate. A first hydraulic cylinder is connected between the limit block and the stop block, and the first hydraulic cylinder is connected to a hydraulic pump. A retaining wall is provided at the top of the rear end of the extension support plate, and a tire wall is stacked in front of the retaining wall.
[0005] Preferably, an operating platform is provided extending downward and outward from the opening of the cavity interlayer, and the hydraulic pump is mounted on the operating platform.
[0006] Preferably, the top surface of the cavity interlayer is provided with a plurality of first rollers, which are connected between the top surface of the cavity interlayer and the top surface of the extension support plate; the top surface of the limiting block is provided with a plurality of second rollers, which are connected between the top surface of the limiting block and the bottom surface of the extension support plate; and the bottom surface of the stop block is provided with a plurality of third rollers, which are connected between the bottom surface of the stop block and the bottom surface of the cavity interlayer.
[0007] Preferably, a fall arresting rope collection device is provided on each of the top two sides of the end of the escape lane. The fall arresting rope collection device includes a housing and a winding column. The housing is a hollow column with a rope outlet on the side of the housing facing the retaining wall. A bearing is connected to each of the upper and lower side walls of the winding column and is rotatably connected to the housing through the bearing. A spring is connected between the top of the winding column and the top of the housing, and between the bottom of the winding column and the bottom of the housing. The spring provides the winding column with rotational reset torque when the winding column rotates. Several fall arresting ropes are wound on the winding column from top to bottom. The other end of the fall arresting rope in the two fall arresting rope collection devices extends out from the rope outlet and is connected to the two side walls of the retaining wall respectively.
[0008] Preferably, the spring is a torsion spring or a spiral spring.
[0009] Preferably, the present invention further includes an auxiliary support device, which includes a second hydraulic cylinder, a sensor, and a controller. One end of the second hydraulic cylinder is hinged to the operating platform and the other end is hinged to the bottom end of the extension support plate. The second hydraulic cylinder is connected to a hydraulic pump. The sensor is set at the end of the escape lane to detect vehicle passage. The sensor and the hydraulic pump are electrically connected to the controller.
[0010] Preferably, the sensor is a pressure sensor, which is disposed on the surface at the end of the escape lane.
[0011] Preferably, the sensor further includes an infrared sensor, which is disposed between the two fall arrestor rope collection devices at a height of 1m-1.5m above the surface of the escape lane.
[0012] The beneficial effects of this utility model are: Compared with existing technologies, the advantages of this utility model are: This utility model prevents vehicles from running off the escape lane and crashing by setting an extended support plate at the end of the escape lane, which is provided by a first hydraulic cylinder. It also buffers and stops the vehicles to avoid large impact forces between the vehicles and the retaining wall, thus preventing casualties. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a top view of the present invention; Figure 3 This is a schematic diagram of the anti-fall rope collection device of this utility model.
[0014] In the diagram: 1. Escape lane; 11. Operating platform; 2. Cavity interlayer; 21. Limiting block; 22. First roller; 23. Second roller; 24. Third roller; 3. Extension support plate; 31. Stop block; 4. First hydraulic cylinder; 5. Hydraulic pump; 6. Retaining wall; 7. Tire wall; 8. Fall arrest rope collection device; 81. Outer shell; 811. Rope outlet; 82. Winding column; 83. Bearing; 84. Spring; 85. Fall arrest rope; 91. Second hydraulic cylinder; 92. Pressure sensor; 93. Infrared sensor. Detailed Implementation
[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0016] like Figure 1-3 As shown, this utility model provides a technical solution: a passively extendable fall arresting device for the end of an escape lane, comprising a hollow interlayer 2 formed below the surface of the escape lane 1 and an extension support plate 3 slidably connected within the hollow interlayer 2. The hollow interlayer 2 is parallel to the surface of the escape lane 1 and has an opening facing the end of the escape lane 1. The front end of the extension support plate 3 is connected to the hollow interlayer 2 and the end extends out of the hollow interlayer 2. A limiting block 21 is provided below the opening of the hollow interlayer 2. The top surface of the limiting block 21 is supported on the bottom surface of the extension support plate 3. A stop block 31 is connected to the bottom of the front end of the extension support plate 3. A first hydraulic cylinder 4 is connected between the limiting block 21 and the stop block 31. The first hydraulic cylinder 4 is connected to a hydraulic pump 5. A retaining wall 6 is provided at the top of the end of the extension support plate 3. A tire wall 7 is stacked on the front side of the retaining wall 6.
[0017] In normal operation, the hydraulic pump 5 pressurizes the first hydraulic cylinder 4, keeping it pressurized. When a vehicle veers off the edge of the escape lane 1, it impacts the tire wall 7, creating a buffer. The vehicle's inertia pushes the tire wall 7 and the retaining wall 6, causing the extension support plate 3 to slide outward within the cavity 2. The extension support plate 3 then causes the stop block 31 to compress the first hydraulic cylinder 4. Because the limiting block 21 blocks the outside of the first hydraulic cylinder 4, the compression of the first hydraulic cylinder 4 further buffers the extension support plate 3 and the vehicle on it, thus preventing the vehicle from veer off the edge of the escape lane. After rescuing the vehicle, the extension support plate 3 is pushed back to its original position by pressurizing the first hydraulic cylinder 4 again with the hydraulic pump 5.
[0018] This utility model prevents vehicles from running off the escape lane 1 and crashing by setting an extended support plate 3 at the end of the escape lane 1 through a first hydraulic cylinder 4, and also buffers and stops the vehicles to avoid large impact forces between the vehicles and the retaining wall 6, which could cause casualties.
[0019] Furthermore, an operating platform 11 is provided extending downward and outward from the opening of the cavity interlayer 2, and the hydraulic pump 5 is installed on the operating platform 11, which facilitates road management personnel to go down from the service lane to the operating platform 11 to operate the hydraulic pump 5, or to inspect and maintain components such as the extended support plate 3 and the first hydraulic cylinder 4 inside the cavity interlayer 2.
[0020] In specific implementation, the foundation and operating platform 11 under the escape lane 1 can be integrally cast using reinforced concrete to ensure its strength; the extension support plate 3, the stop block 31, and the retaining wall 6 can be made of steel structure. While ensuring strength, the steel structure is lighter and more resilient than reinforced concrete, preventing breakage when the extension support plate 3 extends out of the cavity interlayer 2; the limiting block 21 can be made of steel structure and connected by pre-embedded bolts below the opening of the cavity interlayer 2, ensuring high strength and facilitating installation. Alternatively, a steel frame can be installed inside the cavity interlayer 2 to further ensure its strength and prevent the upward tilting force of the extension support plate 3 when it extends out of the cavity interlayer 2, which could cause cracking of the road surface at the top of the cavity interlayer 2.
[0021] Furthermore, the top surface of the cavity interlayer 2 is provided with a plurality of first rollers 22, which are connected between the top surface of the cavity interlayer 2 and the top surface of the extension support plate 3; the top surface of the limiting block 21 is provided with a plurality of second rollers 23, which are connected between the top surface of the limiting block 21 and the bottom surface of the extension support plate 3; the bottom surface of the stop block 31 is provided with a plurality of third rollers 24, which are connected between the bottom surface of the stop block 31 and the bottom surface of the cavity interlayer 2, so that the sliding friction between the various contact surfaces of the extension support plate 3 and the cavity interlayer 2 and the limiting block 21 is changed into rolling friction, thereby reducing the frictional force and preventing the extension support plate 3 from getting stuck in the cavity interlayer 2 or from being damaged by friction.
[0022] Furthermore, a fall arresting rope collection device 8 is provided on each of the top two sides of the end of the escape lane 1. The fall arresting rope collection device 8 includes a housing 81 and a winding column 82. The housing 81 is a hollow column. The housing 81 has a rope outlet 811 on the side facing the retaining wall 6. A bearing 83 is connected to each of the upper and lower side walls of the winding column 82 and is rotatably connected to the housing 81 through the bearing 83. A spring 84 is connected between the top of the winding column 82 and the top of the housing 81, and between the bottom of the winding column 82 and the bottom of the housing 81. The spring 84 provides the rotational return torque for the winding column 82 when it rotates. Several fall arresting ropes 85 are wound on the winding column 82 from top to bottom. The other end of the fall arresting ropes 85 in the two fall arresting rope collection devices 8 extends out from the rope outlet 811 and is connected to the two side walls of the retaining wall 6 respectively. When the extension support plate 3 slides outward within the cavity interlayer 2, the retaining wall 6 pulls the fall arrest rope 85 to block both sides of the extension support plate 3, forming a protective barrier to prevent personnel on the vehicle or rescue personnel from falling from both sides of the extension support plate 3. When the retaining wall 6 pulls the fall arrest rope 85, the fall arrest rope 85 drives the winding column 82 to rotate. The spring 84 provides the winding column 82 with the torque to rotate and reset. When the hydraulic pump 5 pressurizes the first hydraulic cylinder 4 to push the extension support plate 3 to reset, the winding column 82 rotates in the opposite direction, allowing the fall arrest rope 85 to be rewound onto the winding column 82.
[0023] Specifically, the spring 84 is a torsion spring or a spiral spring.
[0024] Furthermore, this utility model also includes an auxiliary support device, which includes a second hydraulic cylinder 91, a sensor, and a controller. One end of the second hydraulic cylinder 91 is hinged to the operating platform 11, and the other end is hinged to the bottom end of the extension support plate 3. The second hydraulic cylinder 91 is connected to a hydraulic pump 5. The sensor is installed at the end of the escape lane 1 to detect vehicle passage. The sensor and the hydraulic pump 5 are electrically connected to the controller. When the sensor detects a vehicle passing, it sends an electrical signal to the controller. When the controller receives the electrical signal, it controls the hydraulic pump 5 to pressurize the second hydraulic cylinder 91, causing the second hydraulic cylinder 91 to extend and provide auxiliary support to the extension support plate 3.
[0025] Specifically, the sensor is a pressure sensor 92, which is installed on the surface at the end of the escape lane 1. When a vehicle passes by, the pressure sensor 92 is triggered by pressure, thereby detecting the passage of the vehicle.
[0026] Furthermore, the sensor also includes an infrared sensor 93, which is positioned between the two fall arrestor rope collection devices 8. The controller can be configured to only control the hydraulic pump 5 to pressurize the second hydraulic cylinder 91 when it simultaneously receives electrical signals triggered by both the infrared sensor 93 and the pressure sensor 92, thus preventing small animals from accidentally triggering the pressure sensor 92. Even with the infrared sensor 93 positioned at a height less than 1m, there is still a possibility of small animals accidentally triggering both the infrared sensor 93 and the pressure sensor 92 simultaneously. However, if it is positioned above 1.5m, some cars may not be able to trigger the infrared sensor 93. Therefore, the infrared sensor 93 is positioned at a height of 1m-1.5m above the surface of the escape lane 1. Specifically, the controller can be implemented using a PLC programmable controller, housed in a control cabinet and placed on the operating platform 11 for easy debugging and maintenance by operators.
[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A passive extendable refuge walkway end fall arrest device, characterized by, The system includes a cavity interlayer (2) located below the surface of the escape lane (1) and an extension support plate (3) slidably connected within the cavity interlayer (2). The cavity interlayer (2) is parallel to the surface of the escape lane (1) and has an opening facing the end of the escape lane (1). The front end of the extension support plate (3) is connected within the cavity interlayer (2) and the end extends out of the cavity interlayer (2). A limit block (21) is provided below the opening of the cavity interlayer (2). The top surface of the limit block (21) is supported on the bottom surface of the extension support plate (3). A stop block (31) is connected to the bottom of the front end of the extension support plate (3). A first hydraulic cylinder (4) is connected between the limit block (21) and the stop block (31). A hydraulic pump (5) is connected to the first hydraulic cylinder (4). A retaining wall (6) is provided at the top of the end of the extension support plate (3). A tire wall (7) is stacked on the front side of the retaining wall (6).
2. The passive extendable end-of-deck fall arrest device of claim 1, wherein, An operating platform (11) is provided extending outward from the opening of the cavity interlayer (2), and the hydraulic pump (5) is provided on the operating platform (11).
3. The passive extendable end-of-deck fall arrest device of claim 1, wherein, The top surface of the cavity interlayer (2) is provided with a plurality of first rollers (22), which are connected between the top surface of the cavity interlayer (2) and the top surface of the extension support plate (3); the top surface of the limiting block (21) is provided with a plurality of second rollers (23), which are connected between the top surface of the limiting block (21) and the bottom surface of the extension support plate (3); the bottom surface of the stop block (31) is provided with a plurality of third rollers (24), which are connected between the bottom surface of the stop block (31) and the bottom surface of the cavity interlayer (2).
4. The passive extendable end-of-deck fall arrest device of claim 2, wherein, At the top of the end of the escape lane (1), there is a fall arrest rope collection device (8) on each side. The fall arrest rope collection device (8) includes a housing (81) and a winding column (82). The housing (81) is a hollow column. The housing (81) has a rope outlet (811) on the side facing the retaining wall (6). The winding column (82) has a bearing (83) connected to each of its upper and lower side walls and is rotatably connected to the housing (81) through the bearings (83). The top of the winding column (82) A spring (84) is connected between the top end of the winding column (82) and the top end of the outer shell (81), and between the bottom end of the winding column (82) and the bottom end of the outer shell (81). The spring (84) provides the winding column (82) with rotational reset torque when the winding column (82) rotates. Several anti-fall ropes (85) are wound on the winding column (82) from top to bottom. The other end of the anti-fall rope (85) in the two anti-fall rope collection devices (8) extends out from the rope outlet (811) and is connected to the two side walls of the retaining wall (6) respectively.
5. The passive extendable end-of-deck fall arrest device of claim 4, wherein, The spring (84) is a torsion spring or a spiral spring.
6. The passive extendable end-of-deck fall arrest device of claim 4, wherein, It also includes an auxiliary support device, which includes a second hydraulic cylinder (91), a sensor and a controller. One end of the second hydraulic cylinder (91) is hinged to the operating platform (11) and the other end is hinged to the bottom end of the extension support plate (3). The second hydraulic cylinder (91) is connected to a hydraulic pump (5). The sensor is set at the end of the escape lane (1) to detect the passage of vehicles. The sensor and the hydraulic pump (5) are electrically connected to the controller.
7. The passive extendable end-of-deck fall arrest device of claim 6, wherein, The sensor is a pressure sensor (92), which is installed on the end surface of the escape lane (1).
8. The passive extendable end-of-deck fall arrest device of claim 7, wherein, The sensor also includes an infrared sensor (93), which is located between two fall arrest rope collection devices (8) at a height of 1m-1.5m above the surface of the escape lane (1).