Cascading device and power distribution vehicle

Abstract

The invention relates to a cascading device and a power distribution vehicle. The cascading device is used for the power distribution vehicle and comprises a cabinet body and a busbar. A wiring space is arranged in the cabinet body. The busbar is arranged in the cabinet body and provided with a first wiring terminal and a second wiring terminal, the first wiring terminal is located in the wiring space, and the second wiring terminal is located outside the cabinet body. The cascading device can be electrically connected with other cascading devices through the cascading cable. Specifically, the two ends of the cascading cable are electrically connected with the first wiring terminals of the two cascading devices respectively, and then the second wiring terminals of the two cascading devices are electrically connected with the corresponding switching stations of the power distribution vehicles, so that cascading between the power distribution vehicles is achieved. Thus, taking the switching station of each power distribution vehicle has N (N is a positive integer) outgoing lines as an example, M (M is a positive integer not less than 2) power distribution vehicles can realize cascade use through the cascade device, thereby realizing one incoming line and M * N outgoing lines, and being capable of meeting the scene requirements of connection of more outgoing lines.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and in particular to a cascade device and a power distribution vehicle. Background Technology

[0002] Conventional mobile substations need to be used in conjunction with distribution vehicles equipped with switch stations. However, due to road transport regulations, the cabin space of distribution vehicles is strictly compressed, resulting in a limited number of bays that can be accommodated (usually ≤6 outgoing lines).

[0003] Therefore, in related technologies, the switching stations of power distribution vehicles mostly adopt a single incoming line and 4-6 outgoing lines, which is difficult to meet the connection requirements of scenarios that require more outgoing lines. Summary of the Invention

[0004] Therefore, it is necessary to provide a cascade device and power distribution vehicle that can meet the needs of more outgoing line connection scenarios to address the above problems.

[0005] A cascaded device for use in a power distribution vehicle, comprising:

[0006] The cabinet contains wiring space.

[0007] The busbar is located in the cabinet and has a first terminal and a second terminal. The first terminal is located within the wiring space, and the second terminal is located outside the cabinet.

[0008] The aforementioned cascading device can be electrically connected to other cascading devices via cascading cables. Specifically, the two ends of the cascading cable are electrically connected to the first terminals of the two cascading devices, and the second terminals of the two cascading devices are then electrically connected to the switching stations of their respective distribution vehicles, thus realizing the cascading of distribution vehicles. For example, taking a switching station of each distribution vehicle with N (N is a positive integer) outgoing lines as an example, M (M is a positive integer not less than 2) distribution vehicles can be cascaded using the cascading device, thereby achieving 1 incoming line and M*N outgoing lines, which can meet the needs of scenarios requiring more outgoing line connections.

[0009] In one embodiment, the cabinet also has an operating opening that connects to the wiring space;

[0010] The cascaded device also includes a cabinet door, which is located at the operating opening and configured to operably open and close the operating opening.

[0011] In this way, while using the cabinet door to isolate the wiring space from the outside world, users can also open the cabinet door to inspect the inside of the wiring space or perform wiring operations.

[0012] In one embodiment, the cascade device further includes a door lock mechanism, which is disposed on the cabinet and / or the cabinet door and has a lock state and an unlock state that can be switched between each other;

[0013] In the locked state, the door lock mechanism locks the cabinet door relative to the cabinet body; in the unlocked state, the door lock mechanism allows the cabinet door to open and close the operating opening.

[0014] Thus, when the cascaded device is connected to the power distribution vehicle and the power distribution vehicle is powered on (i.e., the cascaded device is powered on), the door lock mechanism is switched to the locked state to lock the cabinet door and prevent it from being opened and causing risks such as electric shock.

[0015] In one embodiment, the cascade device further includes a power-on detector, which is located in the cabinet and is used to detect whether the cascade device is powered on.

[0016] The door lock mechanism is electrically connected to the power-on detector, and switches to the locked state when the cascaded device is powered on.

[0017] Thus, when the power detector detects that the cascaded device is powered on, the door lock mechanism can automatically switch to the locked state to lock the cabinet door without requiring the user to make a judgment or operate it.

[0018] In one embodiment, the power-on detector is an electromagnetic induction sensor, which is disposed within the wiring space;

[0019] And / or, the door lock mechanism is an electromagnetic lock;

[0020] And / or, the cascade device further includes a power indicator, which is located outside the cabinet and electrically connected to the power detector, and issues an alert signal when the cascade device is powered on.

[0021] Thus, the door lock mechanism boasts advantages such as fast response and simple opening and closing methods. The energized detector enables non-contact detection, eliminating the need for series connection to wiring, allowing for flexible installation locations, and minimizing impact on power distribution. When the cascaded device is energized, the energized indicator can issue a warning signal to alert the user and reduce their risk of electric shock.

[0022] In one embodiment, the cabinet also has a cable tray connecting to the wiring space, the cable tray being located at the bottom of the cabinet.

[0023] In this way, the cascade cable connecting the first terminal can extend to the bottom of the cabinet, pass through the bottom to the outside of the cabinet, and then pass through the cable passage of the cabinet of another cascade device on the power distribution vehicle, extending upwards to connect with the first terminal of the cascade device. In addition, since the cable passage is located at the bottom of the cabinet, it is less susceptible to external interference and less likely to cause users to accidentally come into contact with the internal cables.

[0024] In one embodiment, the cascade device further includes at least one cable clamp disposed in the wiring space and used to clamp the cable within the wiring space.

[0025] In this way, the cable clamp can fix the cascaded cables in the wiring space, constrain their routing, improve the reliability of the cable connection, reduce the pressure at the connection point with the first terminal, and increase the service life of the cascaded device.

[0026] In one embodiment, the cascading device further includes a cable tie, which is disposed in the cabinet and has at least two mounting positions;

[0027] Each of the cable clamps is selectively mounted in one of the mounting positions.

[0028] In this way, the cable clamps can be installed in the appropriate positions according to the actual wiring situation, which helps to improve the rationality of fixing cascaded cables and make the wiring and routing of cascaded cables smoother and more reasonable.

[0029] A power distribution vehicle includes the cascaded device as described above.

[0030] The aforementioned power distribution vehicle's cascading device can be electrically connected to the cascading devices of other power distribution vehicles via cascading cables. Specifically, both ends of the cascading cable are electrically connected to the first terminals of the two cascading devices, and the second terminals of the two cascading devices are then electrically connected to the corresponding switching stations of their respective power distribution vehicles, thus achieving cascading between power distribution vehicles. For example, taking a switching station with N outgoing lines per power distribution vehicle as an example, M power distribution vehicles can be cascaded together using the cascading device, thereby achieving 1 incoming line and M*N outgoing lines, which can meet the needs of more outgoing line connection scenarios.

[0031] In one embodiment, the power distribution vehicle further includes a cabin, and the cascade device is disposed in the cabin and located at one end of the cabin in the longitudinal direction.

[0032] In this way, the cascaded device is placed in the cabin in the form of a side cabinet, which makes more rational use of the space inside the cabin and facilitates operations such as cascaded wiring. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a partial structural diagram of a power distribution vehicle cascaded via a cascading device in one embodiment of this application.

[0035] Figure 2 for Figure 1 The diagram shows the structure of the cascaded device.

[0036] Figure 3 for Figure 2 Side view of the cascaded device shown.

[0037] Figure 4 for Figure 2 The bottom view of the cascaded device shown.

[0038] Figure 5 for Figure 2 A top view of the cascaded device shown.

[0039] Figure 6 for Figure 2 The diagram shows the structure of the cascaded device behind the hidden cabinet door.

[0040] Figure 7 for Figure 6 The front view of the cascaded device shown.

[0041] Figure 8 for Figure 1 The diagram shows the structure of the cascaded device from another angle.

[0042] Figure 9 for Figure 8 The diagram shows the structure of the cascaded device behind the hidden cabinet door.

[0043] Explanation of reference numerals in the attached drawings: 100, cascade device; 10, cabinet; 11, wiring space; 12, operating opening; 13, cable passage; 20, busbar; 21, first terminal block; 22, second terminal block; 30, cabinet door; 40, door lock mechanism; 50, live indicator; 60, cable clamp; 70, cable tie; 200, power distribution vehicle; 201, cabin; 300, cascade cable. Detailed Implementation

[0044] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0045] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms 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.

[0046] Furthermore, where the term "and / or" appears, it merely describes the relationship between related objects and indicates that three relationships can exist. For example, A and / or B can represent the relationship between A and B: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this document generally indicates an "or" relationship between the related objects before and after it. Where the terms "first" and "second" appear, these terms are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature specified with "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, four, five, etc., unless otherwise explicitly specified.

[0047] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0048] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0049] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0050] Please see Figures 1 to 7 The cascade device 100 provided in one embodiment of this application is used in a power distribution vehicle 200 and includes a cabinet 10 and a busbar 20. The cabinet 10 has a wiring space 11. The busbar 20 is disposed in the cabinet 10 and has a first terminal 21 and a second terminal 22. The first terminal 21 is located inside the wiring space 11, and the second terminal 22 is located outside the cabinet 10.

[0051] Understandably, the first terminal 21 is used for electrical connection of the cascade cable 300, and the second terminal 22 is used for electrical connection of the switch station of the power distribution vehicle 200. One end of the cascade cable 300 is electrically connected to the first terminal 21 of the first cascade device 100, and the other end is electrically connected to the first terminal 21 of another cascade device 100.

[0052] The cascade device 100 is used in the power distribution vehicle 200 and is installed inside the body 201 of the power distribution vehicle 200. Specifically, the body 201 of the power distribution vehicle 200 also has a switch station, and the power distribution vehicle 200 can be used to distribute power to mobile substations.

[0053] The aforementioned cascade device 100 can be electrically connected to other cascade devices 100 via cascade cables 300. Specifically, the two ends of the cascade cable 300 are electrically connected to the first terminals 21 of two cascade devices 100, and the second terminals 22 of the two cascade devices 100 are then electrically connected to the switching stations of their respective distribution vehicles 200, thus achieving cascading between distribution vehicles 200. For example, if each distribution vehicle 200's switching station has N (N is a positive integer) outgoing lines, M (M is a positive integer not less than 2) distribution vehicles 200 can be cascaded using the cascade device 100, thereby achieving one incoming line and M*N outgoing lines, meeting the needs of more outgoing line connection scenarios. Furthermore, the cabinet 10 of the cascade device 100 also protects the electrical structure and cable connections within its wiring space 11, contributing to improved electrical installation.

[0054] In some embodiments, the cabinet 10 further has an operating opening 12 that connects to the wiring space 11. The cascade device 100 also includes a cabinet door 30, which is located at the operating opening 12 and configured to operably open and close the operating opening 12.

[0055] In this way, while using the cabinet door 30 to isolate the wiring space 11 from the outside world, the user can also open the cabinet door 30 to inspect the inside of the wiring space 11 or perform wiring operations.

[0056] Specifically, the operating opening 12 is located in the direction surrounding the height of the cabinet 10 (e.g., Figure 3 The perimeter (shown in the X direction) is designed to allow users to inspect and connect devices within the compartment.

[0057] In some embodiments, the cascade device 100 further includes a door lock mechanism 40, which is disposed on the cabinet body 10 and / or the cabinet door 30 and has a lock state and an unlock state that can be switched between each other. In the locked state, the door lock mechanism 40 locks the cabinet door 30 relative to the cabinet body 10. In the unlocked state, the door lock mechanism 40 allows the cabinet door 30 to open and close the operation opening 12.

[0058] Thus, when the cascade device 100 is connected to the power distribution vehicle 200 and the power distribution vehicle 200 is energized (i.e., the cascade device 100 is energized), the door lock mechanism 40 is switched to the locked state to lock the cabinet door 30, preventing it from being opened and causing risks such as electric shock.

[0059] In some embodiments, the door lock mechanism 40 is an electromagnetic lock. The electromagnetic lock controls the generation and disappearance of the magnetic field by switching current on and off, thereby completing the locking and unlocking actions and switching between the locked and unlocked states. Thus, the door lock mechanism 40 has advantages such as fast response and simple opening and closing methods.

[0060] In some embodiments, the cascade device 100 further includes a power-on detector (not shown), which is located on the cabinet 10 and is used to detect whether the cascade device 100 is powered on. The door lock mechanism 40 is electrically connected to the power-on detector and switches to a locked state when the cascade device 100 is powered on.

[0061] Thus, when the power detector detects that the cascade device 100 is powered on, the door lock mechanism 40 can automatically switch to the locked state to lock the cabinet door 30 without requiring the user to make a judgment or operate it.

[0062] In some embodiments, the power-on detector is an electromagnetic induction sensor, which is located within the wiring space 11.

[0063] In this way, the power-on detector can achieve non-contact detection, does not need to be connected in series to the wiring, has flexible installation location, and has little impact on power distribution.

[0064] In some embodiments, the cascade device 100 further includes a power indicator 50, which is located outside the cabinet 10 and electrically connected to the power detector, and issues an alert signal when the cascade device 100 is powered on.

[0065] Understandably, the prompt signal can be, but is not limited to, signals that can be perceived and recognized by the user, such as lights, sounds, and images. Specifically, the live indicator 50 can be a live display.

[0066] Thus, when the cascade device 100 is powered on, the live indicator 50 can issue a warning signal to remind the user and reduce their risk of electric shock.

[0067] In some embodiments, the cabinet 10 also has a cable pass 13 connecting to the wiring space 11, and the cable pass 13 is located at the bottom of the cabinet 10. Understandably, the cable pass 13 can connect to the outside of the power distribution vehicle 200.

[0068] In this way, the cascade cable 300, which is electrically connected to the first terminal 21, can extend to the bottom of the cabinet 10, pass through the bottom to the outside of the cabinet 10, and then pass through the cable passage 13 of the cascade device 100 on another power distribution vehicle 200, and extend upward to electrically connect with the first terminal 21 of the cascade device 100. In addition, since the cable passage 13 is located at the bottom of the cabinet 10, it is less susceptible to external interference and less likely to cause users to accidentally come into contact with the internal cables.

[0069] Please refer to the following: Figure 8 and Figure 9In some embodiments, the cascade device 100 further includes at least one cable clamp 60 disposed in the wiring space 11 and used to clamp cables within the wiring space 11. Understandably, the cable clamp 60 may be located between the first terminal 21 and the cable passage 13.

[0070] In this way, the cable clamp 60 can fix the cascaded cable 300 within the wiring space 11, constrain its routing, provide a reliable support point for the cable connection, improve the reliability of the cable connection, reduce the pressure at its connection with the first terminal 21, and increase the service life of the cascade device 100.

[0071] Furthermore, the cascade device 100 also includes a cable tie 70, which is located in the cabinet 10 and has at least two mounting positions. Each cable clamp 60 is selectively mounted in one mounting position.

[0072] In this way, the cable clamp 60 can be installed in a suitable position according to the actual wiring situation, which helps to improve the rationality of fixing the cascaded cable 300 and make the wiring and routing of the cascaded cable 300 smoother and more reasonable.

[0073] Specifically, the cascade device 100 also includes at least two cable tie brackets 70, all of which are spaced apart in the height direction of the cabinet 10.

[0074] In this way, all cable tie frames 70 can be equipped with cable clamps 60, providing more mounting positions for the cable clamps 60, which is beneficial for fixing the cascaded cables 300.

[0075] This application also provides a power distribution vehicle 200, including the aforementioned cascade device 100.

[0076] Understandably, in order to achieve its normal function, the power distribution vehicle 200 also includes structures such as a switch station, whose functions may include, but are not limited to, secondary protection and electrical measurement.

[0077] The aforementioned power distribution vehicle 200, whose cascading device 100 can be electrically connected to the cascading devices 100 of other power distribution vehicles 200 via cascading cables 300, has all the beneficial effects of the aforementioned cascading device 100, which will not be elaborated here.

[0078] In some embodiments, the power distribution vehicle 200 further includes a cabin 201, and the cascade device 100 is disposed in the cabin 201 and located at one end of the cabin 201 in the longitudinal direction.

[0079] In this way, the cascade device 100 is placed in the compartment 201 in the form of a side cabinet, which makes more reasonable use of the space inside the compartment 201 and facilitates operations such as cascade wiring.

[0080] The aforementioned power distribution vehicle 200 includes a cascading device 100 comprising a cabinet 10, a busbar 20, a cabinet door 30, an electromagnetic lock, a cable clamp 60, a cable tie 70, and a live indicator. The cascading device 100 is installed inside the compartment 201 of the power distribution vehicle 200, located at one end of the compartment 201, either at the front or rear, to facilitate rapid connection between two power distribution vehicles 200 using cascading cables 300 during cascading. The busbar 20 of the cascading device 100 is installed on the side of the cabinet 10 near the switch station in the power distribution vehicle 200 and can be electrically connected to the switch station of the power distribution vehicle 200 to draw power from the switch station. Meanwhile, the busbar 20 is also electrically connected to the cascaded cable 300 in the wiring space 11 of the cabinet 10. The cascaded cable 300 enters and exits through the bottom cable port 13 and is fixed in the wiring space 11 by the cable clamp 60. The cable clamp 60 is fixed on the cable tie frame 70 at a suitable installation position, which facilitates the cascaded cable 300 to be electrically connected quickly and stably, and is suitable for application scenarios where mobile substations need to be connected quickly.

[0081] The cascade device 100 is built into the power distribution vehicle 200 in the form of a side cabinet. The cabinet 10 forms an independent power connection space in the compartment 201 of the power distribution vehicle 200. The cabinet 10 is equipped with a live indicator 50 and an electromagnetic lock for electrical protection, ensuring the safety and reliability of the cascaded power distribution vehicle 200.

[0082] Cascade device 100 may include at least three usage modes:

[0083] Method 1: Connect the busbars 20 of the cascading device 100 to two distribution vehicles 200 (each distribution vehicle 200 has N outgoing lines) using cascading cables 300, thus achieving cascading between the switching stations of the two distribution vehicles 200. In this way, M distribution vehicles 200 can be cascaded through the cascading device 100 to achieve an operating mode of one incoming line and M*N outgoing lines.

[0084] Method 2: Use a mobile substation for power transformation. Use a cascade cable 300 to connect the busbar 20 of the cascade device 100 on a distribution vehicle 200 (the distribution vehicle 200 has N outgoing lines) to the switch cabinet of the original substation (the switch cabinet has K outgoing lines, where K is a positive integer). This achieves the cascading between the switch station of the distribution vehicle 200 and the switch cabinet of the original substation, forming one incoming line and N+K outgoing lines. The switch cabinet of the original substation is used to extend the outgoing lines of the switch cabinet of the distribution vehicle 200.

[0085] Method 3: Utilize the existing substation for power transformation. Use cascaded cables 300 to connect the busbar 20 of the cascaded device 100 on a distribution vehicle 200 (which has N outgoing lines) to the switch cabinet of the existing substation (which has K outgoing lines), forming one incoming line and K+N outgoing lines. Use the switch station of the distribution vehicle 200 to expand the outgoing lines of the existing switch cabinet.

[0086] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0087] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A cascade device, characterized in that, The cascaded device is used in a power distribution vehicle and includes: Cabinet (10), which has wiring space (11) inside; The busbar (20) is located in the cabinet (10) and has a first terminal (21) and a second terminal (22). The first terminal (21) is located in the wiring space (11) and the second terminal (22) is located outside the cabinet (10).

2. The cascade device according to claim 1, characterized in that, The cabinet (10) also has an operation opening (12) that connects to the wiring space (11); The cascaded device also includes a cabinet door (30), which is located at the operating opening (12) and configured to operably open and close the operating opening (12).

3. The cascade device according to claim 2, characterized in that, The cascaded device also includes a door lock mechanism (40), which is located on the cabinet (10) and / or the cabinet door (30) and has a lock state and an unlock state that can be switched between each other; In the locked state, the door lock mechanism (40) locks the cabinet door (30) relative to the cabinet body (10); in the unlocked state, the door lock mechanism (40) allows the cabinet door (30) to open and close the operation opening (12).

4. The cascade device according to claim 3, characterized in that, The cascaded device also includes a power-on detector, which is located in the cabinet (10) and is used to detect whether the cascaded device is powered on; The door lock mechanism (40) is electrically connected to the power-on detector and switches to the locked state when the cascade device is powered on.

5. The cascade device according to claim 4, characterized in that, The power-on detector is an electromagnetic induction sensor, which is located in the wiring space (11). And / or, the door lock mechanism (40) is an electromagnetic lock; And / or, the cascade device further includes a power indicator (50), which is located outside the cabinet (10) and electrically connected to the power detector, and issues a warning signal when the cascade device is powered on.

6. The cascade device according to any one of claims 1-5, characterized in that, The cabinet (10) also has a cable passage (13) that connects to the wiring space (11), and the cable passage (13) is located at the bottom of the cabinet (10).

7. The cascade device according to any one of claims 1-5, characterized in that, The cascaded device further includes at least one cable clamp (60), which is disposed in the wiring space (11) and is used to clamp the cable in the wiring space (11).

8. The cascade device according to claim 7, characterized in that, The cascaded device also includes a cable tie (70), which is located in the cabinet (10) and has at least two mounting positions; Each of the cable clamps (60) is selectively mounted in one of the mounting positions.

9. A power distribution vehicle, characterized in that, Includes the cascaded device as described in any one of claims 1-8.

10. The power distribution vehicle according to claim 9, characterized in that, The power distribution vehicle also includes a cabin (201), and the cascade device is located inside the cabin (201) and at one end of the cabin (201) in the longitudinal direction.

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