Protective device for hydrogen energy logistics vehicle

Abstract

The invention relates to the technical field of hydrogen tank transportation, in particular to a protective device for a hydrogen energy logistics vehicle, which comprises a fixed base, a plurality of clamping mechanisms mounted on the fixed base, and a plurality of driving elements for controlling the clamping mechanisms to clamp, and a plurality of weight sensors are arranged on the fixed base. A pressure sensor and an anti-skid sensor are arranged on a clamping block of the clamping mechanism; a driving element is electrically connected with a weight sensor, the pressure sensor and the anti-skid sensor; when the multiple weight sensors detect the numerical value larger than the preset weight and the numerical value difference between the multiple weight sensors is smaller than the preset difference value, the weight sensors control the driving element to start and control the clamping mechanism to conduct clamping; the driving elements are controlled by the pressure sensors on the corresponding clamping mechanisms to be closed so as to control the clamping mechanisms to stop clamping, the driving elements are controlled by the anti-skid sensors to be started so as to control the clamping mechanisms to increase the clamping force, and the clamping device has the advantage that false triggering of clamping is effectively reduced.

Description

Technical Field

[0001] This application relates to the technical field of hydrogen tank transportation, and in particular to a protective device for hydrogen-powered logistics vehicles. Background Technology

[0002] With the rapid development of the hydrogen energy industry, hydrogen tanks, as key equipment for storing and transporting hydrogen, are of paramount importance in terms of safety and stability during transportation. To ensure that hydrogen tanks do not shift or collide during transportation, they are usually secured using clamping methods. At the same time, to facilitate rapid loading, unloading, and protection of hydrogen tanks, this clamping structure needs to have good operability.

[0003] Currently, the driving methods for clamping and fixing hydrogen tanks are mainly divided into two types: manual and electric. The manual clamping method requires at least two sets of clamping structures. In actual operation, the operator needs to operate each set of clamping structures one by one, which makes the entire fixing process cumbersome, time-consuming, and labor-intensive. Especially in scenarios where hydrogen tanks need to be loaded and unloaded quickly, the efficiency is low.

[0004] In contrast, electric clamping methods utilize lead screws, hydraulics, and other technologies to control the clamping action. Operators can open and close the clamping structure simply by pressing a button, making operation relatively simple and significantly improving work efficiency. However, existing electric clamping control methods, such as button-based operation, still have certain limitations.

[0005] In response, innovative control methods based on sensor technology have emerged, such as using gravity sensors to achieve automatic clamping. This method can automatically trigger the clamping action after detecting that the hydrogen tank is in place, eliminating the need for manual button operation and further improving efficiency, especially suitable for highly automated transportation scenarios. However, this gravity-sensor-based automatic clamping method also faces the problem of accidental clamping. Summary of the Invention

[0006] To address the aforementioned technical problems, this application provides a protective device for hydrogen-powered logistics vehicles.

[0007] This application provides a protective device for hydrogen-powered logistics vehicles, employing the following technical solution: A protective device for hydrogen fuel cell logistics vehicles includes a fixed base, multiple clamping mechanisms mounted on the fixed base, and multiple driving elements for controlling the clamping of the clamping mechanisms. The fixed base is provided with multiple weight sensors, and the clamping blocks of the clamping mechanisms are provided with pressure sensors and anti-slip sensors. The driving elements are electrically connected to the weight sensors, pressure sensors, and anti-slip sensors. When multiple weight sensors detect values ​​greater than a preset weight and the difference between the values ​​detected by multiple weight sensors is less than a preset difference, the weight sensors control the driving element to start the clamping mechanism for clamping; the driving element is controlled by the pressure sensor on the corresponding clamping mechanism to turn off to control the clamping mechanism to stop clamping, and the driving element is controlled by the anti-slip sensor to start to control the clamping mechanism to increase the clamping force.

[0008] In one embodiment: the clamping mechanism further includes two drive arms for mounting the clamping blocks, the two drive arms move synchronously through a gear linkage mechanism, and the drive element is connected to one of the drive arms.

[0009] In one embodiment: the clamping block is provided with multiple pressure sensors. When the pressure difference between any two pressure sensors is greater than a preset pressure difference, or when the pressure of all pressure sensors reaches a preset pressure, all driving elements are controlled to close all clamping mechanisms to stop clamping.

[0010] In one embodiment: the clamping block is provided with a sliding groove and a sliding block installed in the sliding groove, both ends of the sliding block are provided with a return spring, and the anti-slip sensor is a distance sensor used to detect the position of the sliding block.

[0011] In one embodiment: the clamping block is provided with a rubber pad, the sliding block is provided with an anti-slip pad, and the anti-slip pad is raised on the rubber pad.

[0012] In one embodiment: when the distance sensor detects a distance change greater than a preset distance, it controls all driving elements to start in order to control the clamping mechanism to increase the clamping force; wherein, the distance change is characterized as the sum of distance changes detected by the distance sensor.

[0013] In one embodiment, the increase in clamping force is set to gradually decrease according to the number of times the distance sensor detects distance changes.

[0014] In one embodiment: when the distance sensor detects a distance change greater than a preset distance for the first time, the increase in clamping force is determined based on the length of time during which the distance change is greater than or equal to the preset distance, and the increase is inversely proportional to the length of time.

[0015] In one embodiment: the fixed base includes a mounting base and a placement base, the placement base is slidably mounted on the mounting base in a vertical direction, and a shock-absorbing spring is provided between the placement base and the mounting base.

[0016] In one embodiment: the number of the placement bases is the same as the number of clamping mechanisms, the weight sensor is disposed on the mounting base, the number of the shock-absorbing springs is the same as the number of weight sensors, and the shock-absorbing springs are mounted in an abutting manner with the weight sensors.

[0017] In summary, this application has the following beneficial effects: 1. By setting multiple weight sensors, the clamping situation is avoided due to a single sensor triggering the clamping mechanism. The position of multiple weight sensors can be set to effectively reduce false triggering. 2. The start and stop of the drive element are controlled by weight and pressure sensors to achieve automatic clamping after the hydrogen tank is placed, without the need for additional control; 3. The anti-slip sensor monitors the slippage of the hydrogen tank during transportation. When slippage occurs, the clamping force is increased to further clamp the hydrogen tank and prevent accidents. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the protective device used in this embodiment for hydrogen-powered logistics vehicles. Figure 1 ; Figure 2 This is a schematic diagram of the protective device used in this embodiment for hydrogen-powered logistics vehicles. Figure 2 ; Figure 3 This is a schematic diagram of the clamping mechanism in the protective device for hydrogen-powered logistics vehicles in this embodiment; Figure 4 This is a front view of the protective device used in this embodiment for a hydrogen-powered logistics vehicle; Figure 5 This is one of the control logic block diagrams for the protective device used in hydrogen fuel cell logistics vehicles in this embodiment; Figure 6 This is one of the control logic block diagrams for the protective device used in hydrogen-powered logistics vehicles in this embodiment.

[0019] In the diagram, 100 is a fixed base; 110 is a mounting base; 120 is a placement base; 130 is a shock-absorbing spring; 140 is a telescopic rod; 200 is a clamping mechanism; 210 is a drive arm; 220 is a gear linkage mechanism; 230 is a clamping block; 231 is a pressure sensor; 232 is a sliding block; 233 is a return spring; 234 is an anti-slip pad; 240 is a rubber pad; 250 is a distance sensor; and 300 is a driving element. Detailed Implementation

[0020] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structure, features and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0021] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0022] A protective device for hydrogen-powered logistics vehicles, such as Figure 1 and Figure 2 As shown, the device includes a fixed base 100, a clamping mechanism 200, and a driving element 300. The fixed base 100 includes a mounting base 110 and multiple placement bases 120, which are arranged side by side along the length of the hydrogen tank. In this embodiment, three placement bases 120 are used as an example. The placement bases 120 are slidably mounted on the mounting base 110 in a vertical direction. In this embodiment, the placement bases 120 and the mounting base 110 are connected by two telescopic rods 140, and a shock-absorbing spring 130 is provided between the placement bases 120 and the mounting base 110.

[0023] A weight sensor is installed on the mounting base 110. The number of shock-absorbing springs 130 is the same as the weight sensor, and the shock-absorbing springs 130 are installed in an abutting manner with the weight sensor. Thus, when force is applied to the placement base 120, it will act on the weight sensor through the shock-absorbing springs 130. The shock-absorbing springs 130 are used to cushion the hydrogen tank during placement, reducing damage to the hydrogen tank. They also provide shock absorption during transportation.

[0024] The number of clamping mechanisms 200 is the same as the number of placement bases 120. Each clamping mechanism 200 includes two drive arms 210, and a drive element 300 is used to drive the two drive arms 210 to move synchronously, thereby achieving clamping and releasing. Preferably, to better achieve synchronization between the two drive arms 210, the two drive arms 210 are synchronized via a gear linkage mechanism 220. In this embodiment, the gear linkage mechanism 220 consists of a rack and a gear, and the racks on the two drive arms 210 that mesh with the gears move synchronously.

[0025] In this embodiment, the drive element 300 has two forms. Taking a hydraulic cylinder as an example, the drive element 300 is connected to one of the drive arms 210. It should be noted that the number of drive elements 300 is the same as the number of clamping mechanisms 200.

[0026] A clamping block 230 is mounted on the drive arm 210. The clamping end face of the clamping block 230 adopts an arc-shaped design to cooperate with the hydrogen tank. In addition, a rubber pad 240 is mounted on the clamping end face to provide cushioning and protection during clamping, and at the same time, to provide better friction.

[0027] The clamping block 230 is equipped with multiple pressure sensors 231, and both the pressure sensors 231 and the weight sensors are electrically connected to the drive element 300. During operation, when multiple weight sensors detect values ​​greater than a preset weight, and the difference between the values ​​detected by the multiple weight sensors is less than a preset difference, the weight sensors control the drive element 300 to activate the clamping mechanism 200 for clamping. Conversely, when the pressure difference between any two pressure sensors 231 exceeds a preset pressure difference, or when the pressure of all pressure sensors 231 reaches a preset pressure, all drive elements 300 are controlled to close all clamping mechanisms 200 to stop clamping.

[0028] like Figure 3 As shown, the clamping block 230 is provided with a sliding groove and a sliding block 232 installed in the sliding groove. Both ends of the sliding block 232 are provided with a return spring 233. The return springs 233 at both ends are the same size. The return springs 233 at both ends keep the sliding block 232 in the middle position of the sliding groove when it is not subjected to external force.

[0029] A distance sensor 250 for detecting the position of the sliding block 232 is installed on the clamping block 230. The distance sensor 250 is also electrically connected to the driving element 300. The distance sensor 250 works in conjunction with the sliding block 232 to achieve the function of an anti-slip sensor.

[0030] like Figure 3 and 4 As shown, the sliding block 232 is provided with an anti-slip pad 234, which is raised on the rubber pad 240.

[0031] like Figure 5 As shown, in one embodiment, in order to reduce the problem of mis-clamping and achieve better clamping stability, the overall contact process achieved by the sensor is as follows: S1. When multiple weight sensors detect values ​​greater than the preset weight and the difference between the values ​​of multiple weight sensors is less than the preset difference, the weight sensor control drive element 300 starts to control the clamping mechanism 200 to clamp.

[0032] S2. After clamping is started, when the pressure difference between any two pressure sensors 231 is greater than the preset pressure difference, or when the pressure of all pressure sensors 231 reaches the preset pressure, control all drive elements 300 to close all clamping mechanisms 200 to stop clamping.

[0033] When the pressure difference between any two pressure sensors 231 is greater than the preset pressure difference, it indicates that there may be mis-clamping. At this time, an alarm will be triggered at the same time as stopping the clamping.

[0034] S3. When the distance sensor 250 detects a distance change greater than the preset distance, it controls all drive elements 300 to start in order to control the clamping mechanism 200 to increase the clamping force.

[0035] The detection process of the aforementioned distance sensor 250 continues until the transport is completed and the clamping is released. Throughout the detection process, if multiple detections show a distance change greater than a preset distance, each detection will trigger an increase in clamping force. However, to avoid excessive increase in clamping force, the increase in clamping force is set to gradually decrease based on the number of distance changes detected by the distance sensor 250.

[0036] It should also be noted that if slippage occurs between the hydrogen tank and the clamping mechanism 200, the direction of slippage is not fixed. Therefore, the distance change mentioned in this application, which is greater than the preset distance, refers to the total change in distance detected by the distance sensor 250. For example, if the hydrogen tank slides forward 'a', then backward 'b', then backward 'c', and finally forward 'd', the distance change is the sum of a, b, c, and d. When the sum is greater than the preset distance, the clamping force is increased.

[0037] In addition, such as Figure 6 As shown, in another embodiment, the time when the distance sensor 250 first detects a distance change greater than a preset distance can also be determined. During the distance change process, since the entire change is not continuous, the time when the distance sensor 250 detects a distance change is used as the start time of the change for calculation.

[0038] Specifically, when the distance sensor 250 detects a distance change greater than a preset distance for the first time, the increase in clamping force is determined based on the length of time during which the distance change is greater than or equal to the preset distance. The increase in clamping force is inversely proportional to the length of time; the shorter the time, the greater the increase in clamping force.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A protective device for hydrogen-powered logistics vehicles, characterized in that: The device includes a fixed base (100), multiple clamping mechanisms (200) mounted on the fixed base (100), and multiple drive elements (300) for controlling the clamping of the clamping mechanisms (200). The fixed base (100) is provided with multiple weight sensors, and the clamping blocks (230) of the clamping mechanisms (200) are provided with pressure sensors (231) and anti-slip sensors. The drive elements (300) are electrically connected to the weight sensors, pressure sensors (231), and anti-slip sensors. When multiple weight sensors detect values ​​greater than a preset weight and the difference between the values ​​detected by multiple weight sensors is less than a preset difference, the weight sensors control the driving element (300) to start the clamping mechanism (200) for clamping; the driving element (300) is controlled by the pressure sensor (231) on the corresponding clamping mechanism (200) to turn off so as to control the clamping mechanism (200) to stop clamping, and the driving element (300) is controlled by the anti-slip sensor to start so as to control the clamping mechanism (200) to increase the clamping force.

2. The protective device for hydrogen-powered logistics vehicles according to claim 1, characterized in that: The clamping mechanism (200) further includes two drive arms (210) for mounting the clamping blocks (230). The two drive arms (210) move synchronously through a gear linkage mechanism (220). The drive element (300) is connected to one of the drive arms (210).

3. The protective device for hydrogen-powered logistics vehicles according to claim 2, characterized in that: The clamping block (230) is equipped with multiple pressure sensors (231). When the pressure difference between any two pressure sensors (231) is greater than the preset pressure difference, or when the pressure of all pressure sensors (231) reaches the preset pressure, all driving elements (300) are controlled to close all clamping mechanisms (200) and stop clamping.

4. The protective device for hydrogen-powered logistics vehicles according to claim 1, characterized in that: The clamping block (230) is provided with a sliding groove and a sliding block (232) installed in the sliding groove. Both ends of the sliding block (232) are provided with a return spring (233). The anti-slip sensor is a distance sensor (250) used to detect the position of the sliding block (232).

5. The protective device for hydrogen-powered logistics vehicles according to claim 4, characterized in that: The clamping block (230) is provided with a rubber pad (240), and the sliding block (232) is provided with an anti-slip pad (234). The anti-slip pad (234) is raised on the rubber pad (240).

6. The protective device for hydrogen-powered logistics vehicles according to claim 4 or 5, characterized in that: When the distance sensor (250) detects a distance change greater than a preset distance, it controls all driving elements (300) to start in order to control the clamping mechanism (200) to increase the clamping force; wherein, the distance change is characterized as the sum of distance changes detected by the distance sensor (250).

7. The protective device for hydrogen-powered logistics vehicles according to claim 6, characterized in that: The increase in clamping force is set to gradually decrease based on the number of distance changes detected by the distance sensor (250).

8. The protective device for hydrogen-powered logistics vehicles according to claim 7, characterized in that: When the distance sensor (250) detects a distance change greater than a preset distance for the first time, it determines the increase in clamping force based on the time length during which the distance change is greater than or equal to the preset distance, and the increase is inversely proportional to the time length.

9. The protective device for hydrogen-powered logistics vehicles according to claim 1, characterized in that: The fixed base (100) includes a mounting base (110) and a placement base (120). The placement base (120) is slidably mounted on the mounting base (110) in the vertical direction. A shock-absorbing spring (130) is provided between the placement base (120) and the mounting base (110).

10. The protective device for hydrogen-powered logistics vehicles according to claim 9, characterized in that: The number of the placement bases (120) is the same as that of the clamping mechanism (200). The weight sensor is located on the mounting base (110). The number of the shock-absorbing springs (130) is the same as that of the weight sensor, and the shock-absorbing springs (130) are mounted in an abutting manner with the weight sensor.

Images