A DC converter transformer

Abstract

The present invention discloses a DC converter transformer, which belongs to the technical field of transformers, and comprises a transformer body, wherein bushings are arranged in a linear array on both the front and rear sides of the transformer body, a high-voltage terminal is arranged on the upper side of the inner part of the bushing, and a gas pipe is arranged on the right side of the upper end of the transformer body, and the gas pipe is connected to the transformer body. The present invention detects the temperature of the high-voltage terminal in real time through a temperature detection module, a data processing module, a control module and a cooling module, and cools the high-voltage terminal after the temperature of the high-voltage terminal rises rapidly. Since the heat generated by the high-voltage terminal during operation is monitored in real time, the cooling module will be adjusted according to the temperature rise of the high-voltage terminal to prevent the high-voltage terminal from accelerating the aging process of its internal material due to the rapid rise in its own temperature, thereby ensuring the mechanical strength and stability of the high-voltage terminal.

Description

[0001] technical field.

[0002] The present invention relates to the field of transformers, and more particularly to a direct current converter transformer. Background Art

[0003] The DC converter transformer is a core component of a DC converter station. Its primary function is to provide AC power with a 30° phase shift to the converter valves (on the sending side) or to convert the inverter's pulsed current into AC current (on the receiving side). In a DC transmission system, the DC converter transformer is connected to the converter to convert DC to AC. DC converter transformers are widely used in HVDC transmission systems, power electronics, communications, aerospace, and military applications. Within HVDC systems, they are a key component in enabling long-distance, high-capacity power transmission.

[0004] There are many problems that may occur in the daily use of DC converter transformers. These problems are mainly due to their complex operating environment and design requirements. During operation, the converter transformer has to withstand both AC stress and a large amount of DC stress. Therefore, the insulation problem is very prominent. The converter transformer should have a sufficiently large short-circuit impedance to limit the short-circuit current to prevent the conductive healthy valve from passing through excessive short-circuit current and damaging the components. The most intuitive mechanical and electrical failures are the burning of high-voltage terminals and the damage of high-voltage bushings.

[0005] In the prior art, since heat is generated when current passes through a conductor, the high-voltage terminal will also generate heat when current passes through. If the temperature of the high-voltage terminal rises too much in a short period of time or the temperature is too high, it will accelerate the aging process of the internal material of the high-voltage terminal, causing the structure of the high-voltage terminal to deform, which will affect the mechanical strength and stability of the terminal and may even cause the terminal to fail. Summary of the Invention

[0006] In view of the problems existing in the prior art, an object of the present invention is to provide a DC converter transformer.

[0007] To solve the above problems, the present invention adopts the following technical solution, which can achieve cooling of the high-voltage terminal after its temperature rises rapidly, so as to prevent the high-voltage terminal from accelerating the aging process of its internal materials due to its own rapid temperature rise, thereby ensuring the mechanical strength and stability of the high-voltage terminal.

[0008] A DC converter transformer comprises a transformer body, wherein bushings are arranged in a linear array on both the front and rear sides of the transformer body, high-voltage terminals are provided on the upper sides of the bushings, and a gas pipe is provided on the right side of the upper end of the transformer body, and the gas pipe is connected to the transformer body;

[0009] The inner and outer sides of the bushing are both provided with a temperature detection module, the left side of the front end of the transformer body is provided with a data processing module and a control module from top to bottom, and the right side of the transformer body is provided with a cooling module.

[0010] Furthermore, the temperature detection module is used to monitor the temperature of the high-voltage terminal in real time within a few minutes and transmit the collected data to the data processing module;

[0011] Data processing module: used to calculate the real-time data transmitted by the temperature sensor and send different data to the control module based on the calculation results;

[0012] Control module: By receiving the data transmitted by the data processing module, when the calculation result shows that the temperature of the high-voltage terminal rises rapidly within a few minutes, it controls the cooling module to operate and increase the power;

[0013] Cooling module: used to cool the high-voltage terminal;

[0014] The data processing module calculates the real-time surface temperature of the high-voltage terminal according to the data transmitted by the temperature detection module using the following formula:

[0015] ;

[0016] Where P is the temperature rise rate of the high voltage terminal, is the final temperature of the high voltage terminal within a few minutes, is the initial temperature of the high voltage terminal within a few minutes, It is the time for the temperature detection module to detect the temperature of the high-voltage terminal. When P is greater than the preset rate, the control module controls the cooling module to operate and inputs the airflow into the transformer body through the gas pipe. Then the airflow is transported to the outside of the high-voltage terminal through the bushing to cool the high-voltage terminal.

[0017] Furthermore, front guardrails are provided on both the front and rear sides of the transformer body, and a warning module is provided on the upper side of the front guardrails;

[0018] Warning module: used to warn pedestrians in the area where the transformer is located;

[0019] The data processing module calculates the real-time surface temperature of the high-voltage terminal according to the data transmitted by the temperature detection module using the following formula:

[0020] 0;

[0021] in, is the threshold value of the high voltage terminal surface temperature. When the warning module is in operation, the control module controls the warning module to start the warning module above the front guardrail.

[0022] Furthermore, the inner and outer sides of the transformer body are jointly provided with an isolation component, and the isolation component includes side guardrails fixed on the left and right sides of the transformer body, and the front and rear surfaces corresponding to the relative surfaces of the front guardrail move and are respectively squeezed and contacted with the front and rear sides of the side guardrail on the same side.

[0023] Furthermore, the left and right parts corresponding to the opposite sides of the front guardrail are fixedly connected with extension plates, the front and rear extension plates are staggered with each other, a through hole is opened inside the side guardrail, the extension plate is slidably connected in the through hole, and the lower side of the front guardrail is arranged in a linear array and is rotatably connected with rollers.

[0024] Furthermore, a movable groove is opened on the lower side of the transformer body, and the left and right parts on the front and rear sides of the movable groove are fixedly connected with electric push rods. The back side of the front guardrail at the front is fixedly connected to the telescopic ends of the two electric push rods in the middle, and the front side of the front guardrail at the rear is fixedly connected to the telescopic ends of the electric push rods on the left and right sides.

[0025] Furthermore, a climbing assembly is provided on the front surface of the transformer body and the inner and outer parts of the front guardrail. The climbing assembly includes a first hinge seat fixedly connected to the front surface of the transformer body.

[0026] Furthermore, a second hinge seat is fixedly connected to the front side of the front guardrail in front, a rotating seat is hinged inside the second hinge seat, and a limiting rod is fixedly connected to the left and right sides of the upper side of the rotating seat, and a ladder is hinged inside the first hinge seat, and the ladder is slidably connected to the inside of the front guardrail in front, and limiting grooves are provided on the left and right sides of the lower side of the ladder, and the limiting rod is slidably connected in the limiting groove, and a reset spring is fixedly connected between the inner upper side of the limiting groove and the limiting rod.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The present invention detects the temperature of the high-voltage terminal in real time through the set temperature detection module, data processing module, control module and cooling module, and cools the high-voltage terminal after the temperature of the high-voltage terminal rises rapidly. Since the heat generated by the high-voltage terminal during operation is monitored in real time, the cooling module will adjust according to the temperature rise of the high-voltage terminal to prevent the high-voltage terminal from accelerating the aging process of its internal material due to its own rapid temperature rise, thereby ensuring the mechanical strength and stability of the high-voltage terminal.

[0029] The present invention is activated by setting up a warning module when the surface temperature of the high-voltage terminal exceeds a temperature threshold. When the surface temperature of the high-voltage terminal is higher than the preset temperature threshold, the warning module will issue an alarm to prevent pedestrians from being injured due to accidental contact or approach when passing by the transformer body, thereby improving the safety of the transformer body. At the same time, it also makes it convenient for maintenance personnel to quickly find the location of the transformer body at night.

[0030] The front guardrail provided in the present invention can gradually move away from the transformer body after the surface temperature of the high-voltage terminal exceeds the temperature threshold. Since the position of the front guardrail will gradually move away from the transformer body after a fault occurs in the high-voltage terminal, the warning module provided above the front guardrail will move with the front guardrail, thereby expanding the warning range of the warning module. At the same time, the front guardrail will also isolate pedestrians from the transformer body. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the present invention;

[0032] Figure 2 It is a schematic diagram of the structure of the present invention when viewed from above;

[0033] Figure 3 It is a structural schematic diagram of the front guardrail of the present invention;

[0034] Figure 4 It is a structural schematic diagram of the side guardrail of the present invention;

[0035] Figure 5 It is a structural schematic diagram of the extension plate of the present invention;

[0036] Figure 6 It is a cross-sectional and partially enlarged schematic diagram of the ladder of the present invention;

[0037] Figure 7 This is a schematic diagram of the partial working framework of the temperature detection module, data processing module, control module, cooling module and warning module of the present invention;

[0038] Figure 8 It is a schematic diagram of the working process of the temperature detection module, data processing module, control module, cooling module and warning module of the present invention.

[0039] Description of the numbers in the figure:

[0040] 1. Transformer body; 11. Bushing; 12. High-voltage terminal; 13. Gas pipe; 14. Temperature detection module; 15. Data processing module; 16. Control module; 17. Cooling module; 2. Warning module; 3. Isolation component; 31. Side guardrail; 32. Front guardrail; 33. Extension plate; 34. Through hole; 35. Roller; 36. Moving slot; 37. Electric push rod; 38. Climbing assembly; 381. First hinge seat; 382. Second hinge seat; 383. Rotating seat; 384. Limit rod; 385. Ladder; 386. Limit slot; 387. Return spring. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0042] See also Figures 1 to 8 A DC converter transformer includes a transformer body 1, with bushings 11 arranged in a linear array on both the front and rear sides of the transformer body 1, a high-voltage terminal 12 provided on the upper side of the bushing 11, and a gas pipe 13 provided on the right side of the upper end of the transformer body 1, and the gas pipe 13 is connected to the transformer body 1;

[0043] A temperature detection module 14 is provided on both the inner and outer sides of the bushing 11 , a data processing module 15 and a control module 16 are provided on the left side of the front end of the transformer body 1 from top to bottom, and a cooling module 17 is provided on the right side of the transformer body 1 .

[0044] The temperature detection module 14 is used to monitor the temperature of the high-voltage terminal 12 in real time within a few minutes and transmit the collected data to the data processing module 15;

[0045] Data processing module 15: used to calculate the real-time data transmitted by the temperature sensor and send different data to the control module 16 based on the calculation results;

[0046] The control module 16 receives the data transmitted by the data processing module 15 and controls the cooling module 17 to operate and increase the power when the calculated result shows that the temperature of the high-voltage terminal 12 rises rapidly within a few minutes;

[0047] Cooling module 17: used to cool the high-voltage terminal 12;

[0048] The data processing module 15 calculates the real-time surface temperature of the high-voltage terminal 12 according to the data transmitted by the temperature detection module 14 using the following formula:

[0049] ;

[0050] Wherein, P is the temperature rise rate of the high voltage terminal 12, is the final temperature of the high voltage terminal 12 within a few minutes, is the initial temperature of the high voltage terminal 12 within a few minutes, The time for the temperature detection module 14 to detect the temperature of the high-voltage terminal 12. When P is greater than the preset rate, the control module 16 controls the cooling module 17 to operate and inputs the airflow into the transformer body 1 through the air pipe 13. Then the airflow is transported to the outside of the high-voltage terminal 12 through the bushing 11 and cools the high-voltage terminal 12.

[0051] By adopting the above technical solution, during the operation of the transformer body 1, the high-voltage terminal 12 inside the bushing 11 continuously generates heat due to the passage of current. During this process, the temperature detection module 14 detects the heat of the high-voltage terminal 12 in real time. After detecting the high-voltage terminal 12, the temperature detection module 14 transmits the data to the data processing module 15, which then analyzes the data. When the temperature rise rate of the high-voltage terminal 12 exceeds the preset rate within a few minutes, the data processing module 15 transmits the data to the control module 16, and the control module 16 controls the cooling module 17 according to the data transmitted by the data processing module 15. At this time, the air flow rate of the cooling module 17 into the bushing 11 will increase as the surface temperature of the high-voltage terminal 12 rises. Since the heat generated by the high-voltage terminal 12 during operation is monitored in real time, the cooling module 17 will adjust according to the temperature rise of the high-voltage terminal 12 to prevent the high-voltage terminal 12 from accelerating the aging process of its internal material due to its own rapid temperature rise, thereby ensuring the mechanical strength and stability of the high-voltage terminal 12.

[0052] like Figure 1 As shown, front guardrails 32 are provided on both the front and rear sides of the transformer body 1, and a warning module 2 is provided on the upper side of the front guardrail 32;

[0053] Warning module 2: used to warn pedestrians in the area where the transformer body 1 is located;

[0054] The data processing module 15 calculates the real-time surface temperature of the high-voltage terminal 12 according to the data transmitted by the temperature detection module 14 using the following formula:

[0055] 0;

[0056] in, is the threshold value of the surface temperature of the high voltage terminal 12. When the warning module 2 is turned on, the control module 16 controls the warning module 2 to operate so that the warning module 2 above the front guardrail 32 is started.

[0057] By adopting the above technical solution, after the temperature detection module 14 transmits the real-time detection data of the high-voltage terminal 12 to the data processing module 15, as the data processing module 15 analyzes the data, when the final temperature of the high-voltage terminal 12 within a few minutes is higher than the preset temperature threshold, the data processing module 15 transmits the data to the control module 16, and the control module 16 controls the warning module 2 according to the data transmitted by the data processing module 15, so that the warning module 2 above the front guardrail 32 is activated, and finally warns pedestrians passing around the transformer body 1. Since the surface temperature of the high-voltage terminal 12 is higher than the preset temperature threshold, the warning module 2 will issue a warning to prevent pedestrians from being injured due to accidental contact or approach when passing through the transformer body 1, thereby improving the safety of the transformer body 1. At the same time, it also makes it convenient for maintenance personnel to quickly find the location of the transformer body 1 at night.

[0058] like Figure 1 As shown, an isolation component 3 is provided on both the inner and outer sides of the transformer body 1. The isolation component 3 includes side guardrails 31 fixed on the left and right sides of the transformer body 1. The front and rear opposite surfaces of the corresponding front guardrails 32 move and are respectively squeezed and contacted with the front and rear sides of the side guardrails 31 on the same side.

[0059] Extension plates 33 are fixedly connected to the left and right parts of the opposite sides of the front guardrail 32. The front and rear extension plates 33 are staggered with each other. A through hole 34 is opened inside the side guardrail 31, and the extension plate 33 is slidably connected in the through hole 34. The lower side of the front guardrail 32 is arranged in a linear array and is rotatably connected to a roller 35.

[0060] A movable groove 36 is provided on the lower side of the transformer body 1, and electric push rods 37 are fixedly connected to the left and right parts of the front and rear sides of the movable groove 36. The back of the front guardrail 32 in the front is fixedly connected to the telescopic ends of the two electric push rods 37 in the middle, and the front of the front guardrail 32 in the rear is fixedly connected to the telescopic ends of the electric push rods 37 on the left and right sides.

[0061] By adopting the above technical solution, when the high-voltage terminal 12 is repaired, the electric push rod 37 in the movable groove 36 pushes the front and rear guardrails 32 respectively. As the front guardrails 32 gradually move away from the transformer body 1, the rollers 35 below the front guardrails 32 start to roll due to contact with the ground, and support the front guardrails 32. At the same time, the extension plates 33 fixed between the two front guardrails 32 are intertwined and inserted into the through holes 34 between the side guardrails 31. As the two front guardrails 32 move, the extension plates 33 will also slide inside the through holes 34, and the warning module 2 arranged above the front guardrails 32 will move with the front guardrails 32. Since the position of the front guardrail 32 will gradually move away from the transformer body 1 after the high-voltage terminal 1 fails, the warning module 2 arranged above the front guardrail 32 will move with the front guardrail 32, so that the warning range of the warning module 2 is expanded. At the same time, the front guardrail 32 will also isolate pedestrians from the transformer body 1.

[0062] like Figure 1 As shown, a climbing assembly 38 is provided on the front of the transformer body 1 and the inner and outer parts of the front guardrail 32 . The climbing assembly 38 includes a first hinge seat 381 fixedly connected to the front of the transformer body 1 .

[0063] A second hinge seat 382 is fixedly connected to the front of the front guardrail 32 in front, and a rotating seat 383 is hinged inside the second hinge seat 382. The left and right sides of the upper side of the rotating seat 383 are fixedly connected to the limiting rod 384. A ladder 385 is hinged inside the first hinge seat 381. The ladder 385 is slidably connected to the inside of the front guardrail 32 in front, and limiting grooves 386 are provided on the left and right sides of the lower side of the ladder 385. The limiting rod 384 is slidably connected in the limiting groove 386. A return spring 387 is fixedly connected between the upper inner side of the limiting groove 386 and the limiting rod 384.

[0064] By adopting the above technical solution, when the front guardrail 32 located in front of the transformer body 1 moves, the front guardrail 32 will drive the second hinge seat 382 to move, and the two limit rods 384 above the rotating seat 383 inside the second hinge seat 382 are hinged in the limit groove 386 inside the ladder 385. At the same time, the limit rod 384 is connected to the inner wall of the limit groove 386 through the return spring 387. When the front guardrail 32 starts to move, the rotating seat 383 will rotate inside the second hinge seat 382. , and pull the limit rod 384. Since the upper part of the ladder 385 is hinged in the first hinge seat 381, as the limit rod 384 is pulled, the ladder 385 as a whole will gradually be in a tilted state. After the front guardrail 32 located in the front is pushed, the ladder 385 hinged between the transformer body 1 and the front guardrail 32 is tilted due to the pulling of the limit rod. After the ladder 385 is tilted, it is convenient for maintenance personnel to climb, so that the maintenance efficiency of the maintenance personnel on the high-voltage terminal 12 is improved.

[0065] Working principle: During the operation of the transformer body 1, the high-voltage terminal 12 inside the bushing 11 continuously generates heat due to the passage of current. During this process, the temperature detection module 14 detects the heat of the high-voltage terminal 12 in real time, and the temperature detection module 14 transmits the data to the data processing module 15 after detecting the high-voltage terminal 12. The data processing module 15 then analyzes the data. When the temperature rise rate of the high-voltage terminal 12 exceeds the preset rate within a few minutes, the data processing module 15 transmits the data to the control module 16, and the control module 16 controls the cooling module 17 according to the data transmitted by the data processing module 15. At this time, the air flow rate from the cooling module 17 to the inside of the bushing 11 will increase with the increase in the surface temperature of the high-voltage terminal 12. When the final temperature of the high-voltage terminal 12 within a few minutes is higher than the preset temperature threshold, the data processing module 15 transmits the data to the control module 16, and the control module 16 controls the warning module 2 according to the data transmitted by the data processing module 15, so that the warning module 2 above the front guardrail 32 is activated, and finally the warning module 2 passing through the transformer body 1 is activated. When the high-voltage terminal 12 is being repaired, the electric push rod 37 in the movable slot 36 pushes the front and rear guardrails 32 respectively, so that the rollers 35 under the front guardrails 32 start to roll due to contact with the ground and support the front guardrails 32. At the same time, the extension plates 33 fixed between the two front guardrails 32 are intertwined and inserted into the through holes 34 between the side guardrails 31. After the front guardrail 32 moves, the warning module 2 arranged above the front guardrail 32 will move with the front guardrail 32, and the front guardrail 32 will bring When the second hinge seat 382 is moved, the two limit rods 384 above the rotating seat 383 hinged on the inside of the second hinge seat 382 are located in the limit groove 386 inside the ladder 385. At the same time, the limit rods 384 are connected to the inner wall of the limit groove 386 through the return spring 387. When the front guardrail 32 starts to move, the rotating seat 383 will rotate inside the second hinge seat 382 and pull the limit rods 384. Since the upper part of the ladder 385 is hinged on the first hinge seat 381, as the limit rods 384 are pulled, the ladder 385 as a whole will gradually be in a tilted state.

[0066] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A DC converter transformer, comprising a transformer body (1), characterized in that: Bushings (11) are arranged in a linear array on both the front and rear sides of the transformer body (1), a high-voltage terminal (12) is provided on the upper side of the bushing (11), and a gas pipe (13) is provided on the right side of the upper end of the transformer body (1), and the gas pipe (13) is connected to the transformer body (1); The inner and outer sides of the bushing (11) are provided with a temperature detection module (14); the left side of the front end of the transformer body (1) is provided with a data processing module (15) and a control module (16) from top to bottom; and the right side of the transformer body (1) is provided with a temperature reduction module (17); An isolation component (3) is provided on both the inner and outer sides of the transformer body (1), and the isolation component (3) includes side guardrails (31) fixedly connected to the left and right sides of the transformer body (1) and front guardrails (32) on the front and rear sides. The opposite surfaces of the front guardrails (32) on the front and rear sides move to respectively press and contact with the front and rear sides of the side guardrail (31) on the same side. The left and right parts of the front guardrails (32) on the opposite sides are fixedly connected to extension plates (33), and the front and rear extension plates (33) are staggered with each other. A through hole (34) is provided inside the side guardrail (31), and the extension plate (33) is slidably connected in the through hole (34). The lower side of the front guardrail (32) is arranged in a linear array and is rotatably connected to a roller (35); A movable groove (36) is provided on the lower side of the transformer body (1), and electric push rods (37) are fixedly connected to the left and right parts of the front and rear sides of the movable groove (36), the back of the front guardrail (32) located in the front is fixedly connected to the telescopic ends of the two electric push rods (37) located in the middle, and the front of the front guardrail (32) located in the rear is fixedly connected to the telescopic ends of the electric push rods (37) located on the left and right sides; The front surface of the transformer body (1) and the inner and outer portions of the front guardrail (32) are provided with a climbing assembly (38), wherein the climbing assembly (38) comprises a first hinge seat (381) fixedly connected to the front surface of the transformer body (1); A second hinge seat (382) is fixedly connected to the front face of the front guardrail (32) at the front, a rotating seat (383) is hingedly connected inside the second hinge seat (382), and a limiting rod (384) is fixedly connected to the left and right sides of the upper side of the rotating seat (383). A ladder (385) is hingedly connected inside the first hinge seat (381), and the ladder (385) is slidably connected to the inside of the front guardrail (32) at the front, and limiting grooves (386) are provided on the left and right sides of the lower side of the ladder (385). The limiting rod (384) is slidably connected to the limiting groove (386), and a return spring (387) is fixedly connected between the upper side of the inner side of the limiting groove (386) and the limiting rod (384).

2. A DC converter transformer according to claim 1, characterized in that: Temperature detection module (14): used to monitor the temperature of the high-voltage terminal (12) in real time and transmit the collected data to the data processing module (15); Data processing module (15): used to calculate the real-time data transmitted by the temperature sensor and send different data to the control module (16) based on the calculation results; The control module (16) receives the data transmitted by the data processing module (15), and when the calculated result shows that the temperature of the high-voltage terminal (12) rises rapidly, controls the cooling module (17) to operate and increase the power; Cooling module (17): used to cool the high-voltage terminal (12); The data processing module (15) calculates the real-time surface temperature of the high-voltage terminal (12) according to the data transmitted by the temperature detection module (14) using the following formula: ； Wherein, P is the temperature rise rate of the high voltage terminal (12), is the final temperature of the high voltage terminal (12), is the initial temperature of the high voltage terminal (12), The temperature detection module (14) detects the temperature of the high-voltage terminal (12). When P is greater than a preset rate, the control module (16) controls the cooling module (17) to operate and inputs the airflow into the interior of the transformer body (1) through the air pipe (13). The airflow is then transported to the outside of the high-voltage terminal (12) through the bushing (11) and cools the high-voltage terminal (12).

3. The DC converter transformer according to claim 1, characterized in that: A warning module (2) is provided on the upper side of the front guardrail (32); Warning module (2): used to warn pedestrians in the area where the transformer body (1) is located; The data processing module (15) calculates the real-time surface temperature of the high-voltage terminal (12) according to the data transmitted by the temperature detection module (14) using the following formula: 0； in, is the threshold value of the surface temperature of the high voltage terminal (12). When the warning module (2) is turned on, the control module (16) controls the warning module (2) to operate, so that the warning module (2) located above the front guardrail (32) is activated.

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