A passive punishment type intelligent speed limit roadblock unit, system and method

Abstract

The application discloses a passive punishment type intelligent speed limit roadblock unit, system and method, and belongs to the technical field of road speed limit deceleration traffic facilities. The passive punishment type intelligent speed limit roadblock unit comprises a roadblock flap, a transmission mechanism and a pneumatic control mechanism, wherein one end of the roadblock flap is hingedly installed on a first hinged support on a road surface, and the middle part is connected with the pneumatic control mechanism through the transmission mechanism; the pneumatic control mechanism comprises a pneumatic cylinder, the free end of the piston rod of the pneumatic cylinder is hingedly connected with the roadblock flap through the transmission mechanism, a speed control check valve is arranged in the piston of the pneumatic cylinder, a flow guide hole in communication with the speed control check valve is arranged in the end of the piston rod connected with the piston, and the extension and retraction of the piston rod are controlled through the pneumatic cylinder, so that the lifting and lowering of the roadblock flap are controlled. The intelligent speed limit roadblock system adopts the application and can realize self-provided energy, does not need additional energy, and can adjust the height of the roadblock according to different passing speeds of vehicles.

Description

A passive penalty-type intelligent speed limit barrier unit, system, and method Technical Field

[0001] This invention belongs to the technical field of road speed limit and deceleration traffic facilities. More specifically, it relates to a road barrier and method that can automatically identify speeding behavior and automatically raise its height to force it to decelerate and limit its speed. Background Technology

[0002] In daily life, speed bumps are often set up on roads with heavy traffic and pedestrian flow to slow down vehicles for traffic safety. Conventional speed bumps usually have a fixed clearance height, causing all vehicles, regardless of whether they are speeding, to bump through, affecting the comfort of passengers. Long-term use of these bumps can also damage the vehicle's shock absorption system. More importantly, existing bumps cannot distinguish between different drivers' speeding behaviors and apply different levels of penalties. Therefore, developing an intelligent bumper has significant application value.

[0003] A search revealed that Chinese utility model patent application number 200920083282.0 discloses a vibration-free deceleration roadblock. It utilizes the deformation of flexible materials and the deceleration effect of a cylinder to reduce the height of the roadblock by the weight of the vehicle when it passes through, thus reducing the bumpy feeling when the vehicle passes through. However, the roadblock made of flexible materials is prone to repeated deformation and fatigue damage. In the absence of an external air supply and after long-term use, the cylinder gas will leak and fail to lift the roadblock. The piston retraction stroke under pressure cannot be controlled and adjusted. As a result, the actual application effect of this solution is poor.

[0004] Several Chinese patent applications, including patent numbers 98244309.9, 201020119407.3, 201220014022.X, and 201511016641.7, disclose a large category of roadblocks that use hydraulic control systems to drive flaps to stop vehicles. The flaps, hydraulic pump stations, electrical control systems, and actuators adjust the height of the flaps to force vehicles to slow down. However, these roadblocks share the following characteristics: large size, deep embedment, large amount of installation and construction work, complex systems, high implementation costs, and the need for a hydraulic station to provide a power source or the use of an external power source. These shortcomings and defects make them unsuitable for field implementation, and the equipment is expensive and complex to maintain.

[0005] Chinese patent application No. 201810463497.9 discloses a speed-limiting and shock-absorbing road barrier. It controls the opening and closing of the flip-up plate via a ramp-operated device, and resets the ramp and flip-up plate via a return torsion spring. The triggering mechanism of this road barrier is a precision pressure bar. The tire touches the pressure bar to detect the vehicle's speed. However, because the pressure bar is exposed, it is prone to getting stuck by debris and is affected by different tire tread patterns, leading to malfunctions such as false activation or failure to activate. Furthermore, this application has the following shortcomings: the road barrier can only achieve either obstruction or non-obstruction of passage, and cannot implement different levels of obstruction based on different vehicle speeds. Summary of the Invention

[0006] The purpose of this invention is to provide a passive, penalty-type intelligent speed-limiting roadblock unit, system, and method, thereby solving the shortcomings of existing intelligent speed-limiting roadblocks, such as requiring external energy input, being unable to operate independently, or having complex control systems that cannot adjust the blocking height according to vehicle speed. The intelligent speed-limiting roadblock system of this invention can achieve energy self-sufficiency, does not require external energy input, and can adjust the height of the roadblock according to different vehicle speeds.

[0007] To achieve the above objectives, the technical solution provided by the present invention is as follows:

[0008] This invention provides a passive penalty-type intelligent speed limit road barrier unit, including a road barrier flap, a transmission mechanism and a pneumatic control mechanism, wherein one end of the road barrier flap is hinged to a first hinge support on the road surface, and the middle part is connected to the pneumatic control mechanism through the transmission mechanism.

[0009] The pneumatic control mechanism includes a cylinder. The free end of the piston rod of the cylinder is hinged to the road barrier flap via a transmission mechanism. A speed control check valve is installed inside the piston of the cylinder. A guide hole connected to the speed control check valve is machined inside the piston rod. The extension and retraction of the piston rod is controlled by the cylinder, thereby controlling the raising and lowering of the road barrier flap.

[0010] The roadblock system of this invention can raise the roadblock flaps to achieve different roadblock heights according to the vehicle's speed. This allows vehicles and drivers who comply with speed limits to be free from bumps and vibrations, while the roadblock height increases when vehicles exceeding the speed limit pass through. The higher the speed, the higher the roadblock, and the stronger the bumps and vibrations felt by the vehicles and drivers. Such roadblocks have the characteristic of clear rewards and punishments, overcoming the defect of indiscriminate rewards and punishments when all vehicles are subjected to bumps and vibrations.

[0011] Meanwhile, to facilitate road construction and actual road use, this invention adopts a passive system design that can utilize the vehicle's own weight and kinetic energy to provide energy for the system, without requiring external energy sources of any kind. This makes it particularly suitable for the installation and implementation of outdoor terrace equipment such as roadblocks.

[0012] Furthermore, the transmission mechanism includes a connecting rod, one end of which is hinged to the middle of the barrier flap, and the other end of which is hinged to a slider. The slider is slidably mounted on a guide rail, and the free end of the piston rod is hinged to the slider. The cooperation between the slider and the guide rail guides the movement of the free end of the piston rod, ensuring the smoothness of the barrier flap's raising and lowering.

[0013] Furthermore, a return spring is fitted around the free end of the piston rod. This return spring allows the barrier flap to be reset after a vehicle has passed, ready for the next vehicle to pass. Even further, in this invention, the return spring is a compression spring, which raises the barrier flap during reset.

[0014] Furthermore, the pneumatic control mechanism is installed in the equipment pit below the road surface, and the cylinder is hinged to the second hinge support in the equipment pit. The second hinge support allows the cylinder to rotate slightly, thereby preventing deformation of the piston rod during extension and retraction, which would affect its service life.

[0015] Furthermore, an air intake port is provided at the air inlet on the rod chamber side of the cylinder, and an air intake check valve is installed between the cylinder and the air intake port in the forward direction to prevent the gas inside the cylinder from being discharged outward.

[0016] The present invention also provides a passive penalty-type intelligent speed limit roadblock system, which consists of at least two levels of speed limit roadblock units spaced apart along the direction of road travel. The speed limit roadblock units adopt the aforementioned speed limit roadblock units, and the cylinder rodless chambers of each level of speed limit roadblock unit are connected by air pipes and one-way valves, with the one-way valves installed in the forward direction.

[0017] This invention sets up at least two levels of speed-limiting roadblock units along the road, and the rodless chambers of the cylinders of adjacent two-level speed-limiting roadblock units are connected by air pipes and one-way valves. This can improve the speed-limiting effect and use the gas discharged from the cylinder of the previous level as the power source for the piston movement of the cylinder of the next level, without the need for additional power input.

[0018] Furthermore, the system is equipped with three levels of speed-limiting roadblock units. In the first and second level units, the return springs outside the piston rods are compression springs, which raise the roadblock flap when the springs return to their original position. In the third level unit, the return spring is a tension spring, which lowers the roadblock flap when the springs return to their original position.

[0019] This invention also provides a passive penalty-type intelligent speed limiting method. Using the aforementioned intelligent speed limiting roadblock unit, when the front wheels of a vehicle pass over the roadblock flap, the speed control one-way valve controls whether the guide hole opens or closes according to the vehicle's speed. At high speeds, the guide hole is blocked, the speed control one-way valve is shut off, the cylinder piston cannot move, and the flap cannot be pressed down, obstructing the vehicle from passing. When the vehicle is traveling at low speeds, the speed control one-way valve remains open, the piston moves to the right, thereby causing the flap to descend and the vehicle to pass smoothly.

[0020] This invention also provides another passive penalty-type intelligent speed limiting method. Using the aforementioned intelligent speed limiting roadblock system, when the vehicle's front wheels pass over the first-stage roadblock flap, the flap is depressed, causing a piston rod to move forward via a transmission mechanism. As the piston moves within the cylinder, a speed-controlled one-way valve installed on the piston's guide orifice controls the opening and closing of the guide orifice based on the airflow speed. At high speeds, the guide orifice is blocked, the speed-controlled one-way valve is closed, the piston moves, and the gas in the cylinder is pushed to the next stage cylinder, causing the corresponding speed-controlled one-way valve to close. The high-speed airflow causes the piston of that stage to move to the left, thereby raising the corresponding flap and obstructing the vehicle's passage. When the piston moves to the right at low speed, the first-stage speed-controlled one-way valve keeps the guide orifice open, preventing the piston's movement from outputting gas, allowing the vehicle to pass without obstruction.

[0021] In summary, compared with the prior art, the present invention can achieve the following beneficial effects:

[0022] (1) The speed limit penalty in this invention is targeted, and different road barrier heights are given to different vehicle speeds, thereby achieving different penalty effects; at the same time, the intelligent speed limit road barrier uses the vehicle's own weight to drive the system, without consuming external energy.

[0023] (2) This invention can stack multiple penalty-type intelligent speed limiting units, thereby improving the speed limiting effect. On the other hand, it can detect the speed of the vehicle when passing through the previous level flap and use it as the lifting control parameter for the next level flap. The faster the vehicle speed detected by the previous level flap, the higher the next level flap will be raised. The road barrier flaps are raised step by step, thus achieving stepless height adjustment.

[0024] (3) The device of the present invention has low installation and construction requirements and causes little damage to existing road surfaces. Attached Figure Description

[0025] Figure 1 is a schematic diagram of the passive penalty-type intelligent speed-limiting road barrier system according to one embodiment of the present invention;

[0026] Figure 2 is a schematic diagram of the cylinder according to an embodiment of the present invention;

[0027] Figure 3 is a partially enlarged structural schematic diagram of the cylinder according to an embodiment of the present invention.

[0028] Label Explanation:

[0029] 1. Roadblock flap; 2. First hinge support; 3. Equipment pit; 4. Connecting rod; 5. Guide rail; 6. Slider; 7. Cylinder; 701. Cylinder body; 702. Speed ​​control check valve; 703. Piston rod; 704. End cap; 705. Rod chamber; 706. Rodless chamber; 707. Guide hole; 708. Piston; 709. Air inlet; 710. Exhaust port; 8. Intake check valve; 9. Intake port; 10. Check valve; 11. Return spring; 12. Second hinge support. Detailed Implementation

[0030] To further understand the content of this invention, the invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0031] The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the invention. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of implementation. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0032] Example 1

[0033] Referring to Figure 1, this embodiment of the invention provides a passive penalty-type intelligent speed-limiting road barrier unit, including a road barrier flap 1, a transmission mechanism, and a pneumatic control mechanism. One end of the road barrier flap 1 is hinged to a first hinge support 2 on the road surface, and the middle part is connected to the pneumatic control mechanism through the transmission mechanism. The pneumatic control mechanism can control the raising and lowering of the road barrier flap 1, thereby achieving the obstruction or release of vehicle passage.

[0034] Specifically, the pneumatic control mechanism of this embodiment includes a cylinder 7. The free end of the piston rod 703 of the cylinder 7 is hinged to the road barrier flap 1 through a transmission mechanism. The piston rod 703 is driven by the cylinder piston 708 to perform telescopic movement, thereby driving the road barrier flap 1 to rise and fall through the transmission mechanism.

[0035] As a further improvement to this embodiment, the cylinder 7 is a one-way overtaking cylinder. The cylinder 7 controls the extension and retraction of the piston rod 703, thereby controlling the raising and lowering of the roadblock flap 1. As shown in Figures 2 and 3, the one-way overtaking cylinder of this embodiment includes a cylinder body 701. A piston 708 is slidably installed inside the cylinder body 701. The piston 708 divides the interior of the cylinder body 701 into a rodless chamber 706 and a rod chamber 705. One end of the piston rod 703 passes through the end cover 704 and extends into the interior of the cylinder body 701 and is connected to the piston 708. A speed-controlled one-way valve 702 is installed inside the piston 708. The end of the piston rod 703 connected to the piston 708 has a guide hole 707 that communicates with the speed-controlled one-way valve 702. The throttling orifice plate of the speed-controlled one-way valve 702 is located inside the guide hole 707, and its valve core is located in the rodless chamber 706 of the cylinder.

[0036] It should be noted that the specific structure of the aforementioned speed-controlled check valve 702 can be found in the patent application with application number 2020115024502, and will not be described again here.

[0037] As one implementation of the transmission mechanism, the transmission mechanism includes a connecting rod 4, one end of which is hinged to the middle of the road barrier flap 1, and the other end is hinged to a slider 6. The slider 6 is slidably mounted on the guide rail 5, and the free end of the piston rod 703 is hinged to the slider 6. When the piston rod 703 moves telescopically, the slider 6 guides the movement of the free end of the piston rod 703, causing the free end of the piston rod 703 to move horizontally along the guide rail 5. Furthermore, the bottom of the cylinder 7 is hinged to the second hinge support 12, which allows the cylinder to rotate slightly and prevents the piston rod 703 from deforming. Preferably, the pneumatic control mechanism, guide rail 5, and slider 6 are all installed in the equipment pit 3 below the road surface.

[0038] As a further improvement to this embodiment, a return spring 11 is sleeved on the outside of the free end of the piston rod 703. When the vehicle passes over the barrier flap 1, the flap is reset by the action of the return spring 11. Specifically, in this embodiment, the return spring 11 is a compression spring so that the barrier flap 1 is raised when reset.

[0039] In this embodiment, an air intake port 9 is provided at the air inlet 709 on the rod chamber 705 side of the cylinder 7, and an air intake check valve 8 is installed between the cylinder 7 and the air intake port 9 in the forward direction, thereby preventing the gas inside the cylinder 7 from being discharged outward.

[0040] In the intelligent speed-limiting road barrier unit of this embodiment, when the front wheels of a vehicle pass over the road barrier flap 1, the speed control one-way valve 702 controls whether the guide hole 707 is opened or closed according to the vehicle's speed. At high speed, the guide hole is blocked, the speed control one-way valve 702 is cut off, the cylinder piston cannot move, and the flap cannot be pressed down, thus obstructing the vehicle from passing. When the vehicle is traveling at low speed, the speed control one-way valve 702 remains open, the piston moves to the right, thereby causing the flap to descend and the vehicle to pass smoothly.

[0041] Example 2

[0042] This embodiment provides a passive penalty-type intelligent speed-limiting roadblock system. The system consists of at least two levels of speed-limiting roadblock units spaced apart along the direction of road travel. The structure of the speed-limiting roadblock unit is the same as in Embodiment 2. Furthermore, each level of cylinder 7 has an air inlet 709 on the rod chamber 705 side and an exhaust port 710 on the rodless chamber side. The rodless chambers 706 of each level of cylinder 7 are connected to each other through air pipes and one-way valves 10. The one-way valves 10 are all installed facing forward.

[0043] By coordinating multiple speed-limiting barrier units, the speed-limiting effect can be improved. Furthermore, the gas discharged from the first-stage cylinder can enter the rodless chamber of the next-stage cylinder, thus providing power for the lifting of the next-stage flap. In addition, the vehicle's speed can be detected by the speed at which the flap is pressed down when the vehicle passes, allowing for the use of a speed-controlled one-way valve to control whether and by how much the next-stage flap is raised.

[0044] As a preferred embodiment of the present invention, the intelligent speed limiting roadblock system is provided with three levels of speed limiting roadblock units. In the first and second level units, the return springs 11 outside the piston rod are compression springs, which lift the flap when the springs return to their original position. In the third level unit, the return spring 11 is a tension spring, which flattens the flap when the springs return to their original position.

[0045] The intelligent speed-limiting roadblock system of this invention has multi-level speed-limiting roadblock units. It can monitor the speed of a vehicle passing through the previous level flap and control the lifting amount of the next level flap according to the vehicle speed. The faster the vehicle speed detected by the previous level flap, the higher the next level flap will be raised. When the vehicle passes through the next level flap, the air pressure output by the cylinder resets the previous level flap. Therefore, the flaps can be set in a multi-level form. Specifically, the number of roadblock flap levels can be arbitrarily stacked as needed. It should be noted that the passive pneumatic control system of this invention can also be replaced by a hydraulic control system, simply by replacing the fluid in the corresponding working cylinder with liquid.

[0046] Working principle: The passive penalty-type intelligent speed-limiting road barrier system of this invention first creates equipment pits on the road. The transmission mechanism (in this embodiment, a linkage mechanism) is placed underground, with its hinges fixed to the bottom of the pit. The road barrier flap is placed on the ground, its hinges fixed to the road. After installation and testing, it is ready for use. When the front wheels of a vehicle pass over the road barrier flap, it presses down, driving the slider in the linkage mechanism to move forward, causing the piston rod to move forward. As the piston moves within the cylinder, a speed-controlled one-way valve installed on the piston guide hole controls the opening and closing of the guide hole according to the airflow speed. At high speeds, the guide hole is closed, allowing the piston to push the gas out of the cylinder into the next cylinder, pushing the piston of the next stage cylinder to the left. This, through the linkage, pushes the next stage flap up, obstructing the vehicle's passage. When the piston moves to the right at low speed, the speed-controlled one-way valve keeps the guide hole open, preventing the piston from outputting gas, allowing the vehicle to pass without obstruction. The height of the flap's rise is directly proportional to the vehicle's speed.

[0047] The following describes the specific working process of the intelligent speed-limiting roadblock system of the present invention, taking the setting of a three-level intelligent speed-limiting roadblock unit as an example:

[0048] The vehicle passes through the first level of roadblock unit:

[0049] (1) When the vehicle passes the first-stage obstacle flap 1 at high speed (the limit can be set according to the actual situation), the flap is quickly pressed down, and the piston 708 moves forward rapidly. At this time, the speed control one-way valve 702 is closed, and all the high-speed gas pushed out by the piston enters the air pipe and opens the one-way valve 10. The high-speed airflow enters the subsequent cylinders, causing the corresponding speed control one-way valve 702 to close. The high-speed airflow causes the piston 708 in the subsequent cylinders to move to the left, thereby raising the corresponding obstacle flap 1. The height of the flap is related to the gas flow rate entering the cylinder, and the gas flow rate is related to the moving speed of the piston 708. After the wheel passes, the first-stage obstacle flap is raised under the action of the return spring 11, waiting for the next wheel to press down.

[0050] (2) When the vehicle passes the first-stage obstacle flap 1 at low speed, the flap slowly presses down, and the piston moves forward slowly. At this time, the speed control check valve 702 cannot be closed, and the gas in the rodless chamber 706 enters the rod chamber 705 through the guide hole 707. The piston 708 moves freely in the cylinder and cannot push out or pushes out a small amount of gas into the air pipe to open the check valve 10. The low-speed airflow enters the subsequent cylinders and cannot close the corresponding speed control check valve. The low-speed airflow flows freely through the guide hole on the piston and cannot make the piston in the subsequent cylinder move to the left, thus preventing the corresponding obstacle flap from rising. When the speed is below the speed limit, the flap can be easily pressed down without resistance, and the vehicle can pass through without obstacles. After the wheel passes, the first-stage obstacle flap rises under the action of the return spring, waiting for the next wheel to press down.

[0051] Vehicles pass through the second level of roadblock unit:

[0052] (1) When the wheel passes through the intermediate-level obstacle flap at high speed, the flap quickly presses down, and the piston moves forward rapidly. At this time, the speed control check valve is closed, and all the high-speed gas pushed out by the piston enters the air pipe, opening the corresponding check valve. The high-speed airflow enters the third-stage cylinder, causing the corresponding speed control check valve to close. The high-speed airflow causes the piston in the third-stage cylinder to move to the left, thereby raising the corresponding obstacle flap. If the vehicle passes through the first-stage flap at high speed, the output airflow causes the third-stage flap to rise to its limit, and the second-stage flap cannot output airflow, so it cannot be pressed down. At this time, the vehicle will be hindered by the raised and unpressable second-stage flap, and will bump through. The height of the second-stage obstacle flap is related to the gas flow rate entering the third-stage cylinder, and the gas flow rate is related to the movement speed of the second-stage piston. After the wheel passes, the second-stage flap rises under the action of the second-stage return spring, waiting for the next wheel to press down.

[0053] (2) When the vehicle passes the intermediate flap (second-stage flap) at low speed, the flap slowly presses down, and the piston moves forward slowly. At this time, the speed control check valve cannot close, the second-stage piston cannot be pushed out, or a small amount of gas is pushed into the air pipe to open the check valve. The low-speed airflow enters the third-stage cylinder, which cannot close the corresponding speed control check valve. The low-speed airflow cannot make the piston in the third-stage cylinder move to the left, so the third-stage flap cannot rise. When the speed is below the speed limit, the vehicle can pass through without obstruction. After the wheel passes, the second-stage flap rises under the action of the second-stage return spring, waiting for the next wheel to pass over it.

[0054] Vehicles pass through the third level of roadblock unit:

[0055] (1) When the wheel passes the final stage flap (third-stage obstacle flap) at high speed, it pushes the third-stage piston to move forward rapidly. At this time, the corresponding speed control check valve is closed, and all the high-speed gas pushed out by the third-stage piston enters the air pipe. However, the check valve is closed in the reverse direction, and the high-speed airflow cannot be discharged. Therefore, the third-stage piston cannot move due to the gas pressure. The third-stage flap always maintains the highest lifting height, and the vehicle passes through the obstacle with the highest bump. After the wheel passes, under the tension of the third-stage return spring, the airflow passage is formed due to the action of the third-stage speed control check valve. The third-stage piston moves freely to the left in the cylinder, and the third-stage flap descends, waiting for the next vehicle to pass.

[0056] (2) When the vehicle passes the final-stage flap at low speed, the flap slowly presses down, and the third-stage piston moves forward slowly. At this time, the speed control check valve cannot be shut off, and the gas in the third-stage cylinder flows freely in the cylinder, and the piston also moves freely. The vehicle moving at low speed can easily press down the third-stage flap, achieving unobstructed passage. After the wheel passes, under the action of the third-stage return spring, the third-stage flap descends to the ground, waiting for the next wheel to press down.

[0057] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A passive penalty-type intelligent speed-limiting road barrier unit, characterized in that, The device includes a road barrier flap (1), a transmission mechanism, and a pneumatic control mechanism. One end of the road barrier flap (1) is hinged to a first hinge support (2) on the road surface, and the middle part is connected to the pneumatic control mechanism through the transmission mechanism. The pneumatic control mechanism includes a cylinder (7). The free end of the piston rod (703) of the cylinder (7) is hinged to the road barrier flap (1) through the transmission mechanism. A speed control one-way valve (702) is installed inside the piston (708) of the cylinder (7). A guide hole (707) communicating with the speed control one-way valve (702) is machined inside the piston rod (703) connected to the piston (708). The cylinder (7) controls the extension and retraction of the piston rod (703), thereby controlling the lifting and lowering of the road barrier flap (1).

2. The passive penalty-type intelligent speed-limiting road barrier unit according to claim 1, characterized in that, The transmission mechanism includes a connecting rod (4), one end of which is hinged to the middle of the road barrier flap (1), and the other end is hinged to the slider (6). The slider (6) is slidably mounted on the guide rail (5), and the free end of the piston rod (703) is hinged to the slider (6).

3. The passive penalty-type intelligent speed-limiting road barrier unit according to claim 2, characterized in that, A return spring (11) is sleeved on the outside of the free end of the piston rod (703).

4. The passive penalty-type intelligent speed-limiting roadblock unit according to any one of claims 1-3, characterized in that, The pneumatic control mechanism is installed in the equipment pit (3) below the road surface, and the cylinder (7) is hinged to the second hinge support (12) in the equipment pit (3).

5. The passive penalty-type intelligent speed-limiting roadblock unit according to any one of claims 1-3, characterized in that, An air intake port (9) is provided at the air inlet (709) on one side of the rod chamber (705) of the cylinder (7), and an air intake check valve (8) is installed between the cylinder (7) and the air intake port (9) in the forward direction to prevent the gas inside the cylinder (7) from being discharged outward.

6. A passive, penalty-type intelligent speed-limiting road barrier system, characterized in that, The system consists of at least two levels of speed-limiting roadblock units spaced apart along the direction of road travel. The speed-limiting roadblock units are the speed-limiting roadblock units according to any one of claims 1-5. The rodless chambers (706) of the cylinders (7) of each level of speed-limiting roadblock unit are connected by air pipes and one-way valves (10). The one-way valves (10) are installed in the positive direction.

7. The passive penalty-type intelligent speed-limiting road barrier system according to claim 6, characterized in that, The system is equipped with three levels of speed-limiting roadblock units. The return springs (11) outside the piston rods in the first and second level units are compression springs, while the return springs (11) in the third level unit are tension springs.

8. A passive penalty-based intelligent speed limiting method, characterized in that, Using the intelligent speed-limiting road barrier unit according to any one of claims 1-5, when the front wheels of the vehicle pass over the road barrier flap (1), the speed control one-way valve (702) controls whether the guide hole (707) is open or closed according to the vehicle's driving speed. When the speed is high, the guide hole is blocked, the speed control one-way valve (702) is cut off, the cylinder piston cannot move, and the flap cannot be pressed down, thus hindering the vehicle from passing; while when the vehicle is traveling at low speed, the speed control one-way valve (702) remains open, the piston moves to the right, thereby causing the flap to descend and the vehicle to pass smoothly.

9. A passive penalty-based intelligent speed limiting method, characterized in that, Using the intelligent speed-limiting road barrier system described in claim 6 or 7, when the front wheels of the vehicle pass over the first-stage road barrier flap (1), the flap will be pressed down, thereby pushing the piston rod (703) forward through the transmission mechanism. When the piston (708) moves in the cylinder, the speed control one-way valve (702) installed on the piston guide hole controls whether the guide hole is open or closed according to the speed of the airflow. When the speed is high, the guide hole is blocked, the speed control one-way valve (702) is cut off, the piston (708) moves, and pushes the gas in the cylinder to the subsequent stages of cylinders, so that the corresponding speed control one-way valve (702) is cut off. The high-speed airflow causes the piston (708) in the subsequent stages of cylinders to move to the left, thereby raising the corresponding flap and obstructing the passage of the car. When the piston moves to the right at a low speed, the first-stage speed control one-way valve (702) keeps the guide hole open, the movement of the piston cannot output gas, and the car passes through without obstruction.

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