Multifunctional warning flag

Abstract

The invention relates to the technical field of warning devices, and discloses a multifunctional warning flag which comprises a frame, universal wheels are arranged at the bottom end of the frame, a hook is fixedly mounted at the top end of the frame, a connecting frame is fixedly mounted at the rear end of the frame, a warning assembly is arranged on the frame, and the warning assembly comprises a fixing seat. According to the multifunctional warning flag, in order to improve the practicability of the warning flag body, the warning assembly is arranged and matched with a fixing base, a circular ring block, a spherical groove, a ball head, a connecting rod and a balancing weight, so that an elastic rod is better kept in a vertical state after being deformed under the action of external force, and a hydraulic supporting rod, a threaded block, a threaded sleeve and a vertical rod are matched; according to the warning flag, the light reflecting mark is arranged on the flag surface, so that the flag surface and the light reflecting mark can move up and down during warning, a cross rod, a top cylinder, an L-shaped groove, a servo air cylinder, a rack, a hinge seat and a gear are matched, the flag surface can be folded to facilitate storage when the warning flag body is not used, and therefore the practicability of the warning flag body is improved.

Description

Technical Field

[0001] The invention relates to the technical field of warning devices, in particular to a multifunctional warning flag. Background Art

[0002] Safety is of vital importance in the daily operation of refueling trucks at airports and other places. Refueling trucks transport flammable and explosive oil products, and their operating environment has a high safety risk. Therefore, effective warning signs are needed to ensure the safety of surrounding personnel and equipment. Traditional warning flags for refueling trucks often have a single function and only serve as a simple visual warning. With the development of science and technology and the continuous improvement of the safety performance requirements for refueling trucks, it is particularly necessary to develop a warning flag with multiple functions.

[0003] At present, some warning sign equipment with improved designs have appeared in some industrial scenes and transportation vehicles. However, traditional warning flags often rely only on visual warnings. For those who are distracted or have poor eyesight, it is difficult to serve as a timely and effective warning. Without other forms of alarm devices, people approaching dangerous areas cannot be reminded from multiple dimensions. The flagpoles of ordinary warning flags are usually fixed and cannot be extended or retracted up and down or moved left and right according to actual needs. The position of the warning flag cannot be flexibly adjusted when impacted. Traditional warning flags are mostly deployed manually, which is cumbersome to operate and may not be deployed in time in an emergency. Moreover, the manual deployment method may cause the flag to be insufficiently deployed due to negligence or improper operation of the operator, affecting the warning effect.

[0004] In view of this, we propose a multifunctional warning flag. Summary of the invention

[0005] The object of the present invention is to provide a multifunctional warning flag to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A multifunctional warning flag comprises a frame, a universal wheel is arranged at the bottom of the frame, a hook is fixedly installed at the top of the frame, a connecting frame is fixedly installed at the rear end of the frame, and a warning component is arranged on the frame, and the warning component comprises:

[0008] A fixing seat, the outer wall of the frame is fixedly installed with a fixing seat, a circular ring block is fixedly installed on the fixing seat, a spherical groove is opened on the circular ring block, a ball head is slidably installed inside the spherical groove, a connecting rod is fixedly installed on one end of the ball head, a counterweight block is fixedly installed on the connecting rod, one end of an elastic rod is fixedly installed on the other end of the ball head, and the other end of the elastic rod is fixedly connected to the fixed end of the hydraulic strut;

[0009] A threaded block, a threaded block is fixedly installed at the bottom end of the movable end of the hydraulic strut, a threaded sleeve is threadedly installed on the threaded block, the bottom end of the vertical rod is clamped inside the threaded block, the vertical rod is sleeved on the inner side of the vertical section of the flag, a reflective mark is arranged on the flag, the reflective mark is in an "X" shape, a cross bar is sleeved on the inner side of the horizontal section of the flag, a top cylinder is fixedly installed on the top of the movable end of the hydraulic strut, an L-shaped groove is opened on the top cylinder, the top end of the vertical rod is clamped on the inner side of the L-shaped groove, and the cross bar passes through the L-shaped groove;

[0010] A servo cylinder is fixedly mounted on the bottom inner surface of the top cylinder, a rack is fixedly mounted on the piston end of the servo cylinder, a hinge seat is fixedly mounted on the servo cylinder, a gear is rotatably mounted inside the hinge seat, the rack meshes with the gear, and the rectangular outer wall of the gear is fixedly connected to the outer wall of the cross bar.

[0011] Preferably, four sets of universal wheels are provided, so that the frame can move more smoothly.

[0012] Preferably, the frame is connected to the refueling vehicle body via a connecting frame.

[0013] Preferably, the vertical poles, flags, reflective signs, cross poles, L-shaped grooves, servo cylinders, racks, articulated seats and gears are arranged in three groups, and the three groups of vertical poles, flags, reflective signs, cross poles, L-shaped grooves, servo cylinders, racks, articulated seats and gears are arranged in an equally spaced circular array with the center of the circular cross section of the hydraulic support rod as the array center, thereby increasing the warning display area and improving the warning effect.

[0014] Preferably, an alarm component is provided on the top tube, and the alarm component includes a top cover, the top end of the top tube is clamped with the top cover, an arc groove is opened on the top tube, and a circular plate is fixedly installed on the inner side of the top end of the top tube.

[0015] Preferably, an ultrasonic sensor is fixedly mounted on the top of the circular plate, the ultrasonic sensor comprises a transmitter and a receiver, a microcontroller is fixedly mounted on the top of the center of the circular plate, and a warning light is fixedly mounted on the top of the top cover.

[0016] Preferably, four groups of arc grooves and ultrasonic sensors are provided, and the four groups of arc grooves and ultrasonic sensors are arranged in a circular array with equal spacing with the center of the circular cross section of the circular plate as the array center, so as to better perform multi-directional proximity distance alarm.

[0017] Preferably, an auxiliary component is provided at the bottom end of the hydraulic support rod, and the auxiliary component includes a threaded rod, the threaded rod is installed with internal threads of the counterweight block, and a knob is fixedly installed at one end of the threaded rod.

[0018] Preferably, a limiting groove is provided on the frame, the threaded rod passes through the limiting groove, a nut is threadedly mounted on the other end of the threaded rod, and the outer wall of the nut is slidably fitted to the inner side of the frame.

[0019] Preferably, the limiting groove is semicircular, and the projection of the center circle of the ball head in the vertical direction coincides with the cross-sectional center of the limiting groove in the vertical direction, thereby better constraining the movement direction of the hydraulic strut.

[0020] Compared with the prior art, the present invention provides a multifunctional warning flag, which has the following beneficial effects:

[0021] 1. In order to improve the practicality of the warning flag body, the multifunctional warning flag is provided with a warning component, which cooperates with a fixing seat, a circular ring block, a spherical groove, a ball head, a connecting rod and a counterweight block, so that the elastic rod can better maintain a vertical state after being deformed by an external force. The hydraulic support rod, the threaded block, the threaded sleeve and the vertical rod are cooperated so that the flag and the reflective mark can move up and down when giving a warning. The cross bar, the top tube, the L-shaped groove, the servo cylinder, the rack, the articulated seat and the gear are cooperated so that the flag can be folded up for easy storage when the warning flag body is not in use, thereby increasing the practicality of the warning flag body.

[0022] 2. In order to further enhance the versatility of the warning flag, the multifunctional warning flag is provided with an alarm component, which cooperates with a top cover, an arc groove, a circular plate and an ultrasonic sensor. The transmitter transmits ultrasonic pulses to the target object. The ultrasonic wave propagates in the air, reflects back after encountering the target object, and is received by the receiver. According to the time difference from the emission to the reception of the ultrasonic wave, when the detected distance is less than or equal to the set threshold, the microcontroller determines that an alarm signal needs to be issued, and sends a control instruction to the warning light, which warns the surrounding people with a striking visual signal to remind them to pay attention to possible dangers, thereby further enhancing the versatility of the warning flag.

[0023] 3. In order to improve the applicability of the warning flag body, the multifunctional warning flag is provided with an auxiliary component. When it is necessary to limit the movement direction of the warning flag body so that it can only swing back and forth, the threaded rod is screwed into the counterweight block through the knob, and then passed through the limiting groove, and then the nut is screwed on the outside of the threaded rod, so that the warning flag body can be limited so that it can only swing back and forth, so as to adapt to the use requirements in various environments, thereby improving the applicability of the warning flag body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic top view of the overall structure of the present invention;

[0025] Figure 2 It is a schematic top view of the overall structure of the present invention from another viewing angle;

[0026] Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure of the middle A area;

[0027] Figure 4 It is a schematic diagram of an explosion from the bottom up of a part of the structure of the present invention;

[0028] Figure 5 It is a schematic diagram of a partial exploded top view of the structure of the present invention;

[0029] Figure 6 For the present invention Figure 5 Schematic diagram of the enlarged structure of the middle B area;

[0030] Figure 7 It is a schematic cross-sectional view of part of the structure of the present invention;

[0031] Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged structure of the middle C area.

[0032] In the figure: 1, frame; 2, universal wheel; 3, hook; 4, connecting frame; 5, warning component; 51, fixing seat; 52, ring block; 53, spherical groove; 54, ball head; 55, connecting rod; 56, counterweight block; 57, elastic rod; 58, hydraulic support rod; 59, threaded block; 510, threaded sleeve; 511, vertical rod; 512, flag; 513, reflective logo; 514, cross bar; 515, top tube; 516, L-shaped groove; 517, servo cylinder; 518, rack; 519, hinged seat; 520, gear; 6, alarm component; 61, top cover; 62, arc groove; 63, round plate; 64, ultrasonic sensor; 641, transmitter; 642, receiver; 65, microcontroller; 66, warning light; 7, auxiliary component; 71, threaded rod; 72, knob; 73, limit groove; 74, nut. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the present application, the orientation or positional relationship indicated by the term "on" is based on the orientation or positional relationship shown in the accompanying drawings. It is mainly for the purpose of better describing the present application and its embodiments, and is not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, the term "on" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to the specific circumstances.

[0035] See also Figure 1 - Figure 8 , the present invention provides a technical solution:

[0036] A multifunctional warning flag comprises a frame 1. A universal wheel 2 is arranged at the bottom of the frame 1. In addition, four groups of universal wheels 2 are arranged, so that the frame 1 can move more smoothly. A hook 3 is fixedly installed at the top of the frame 1. A connecting frame 4 is fixedly installed at the rear end of the frame 1. In addition, the frame 1 is connected to a refueling truck body through the connecting frame 4.

[0037] In one embodiment of the present invention, a warning component 5 is provided on the vehicle frame 1, and the warning component 5 includes a fixing seat 51, and the fixing seat 51 is fixedly installed on the outer wall of the vehicle frame 1, and a circular ring block 52 is fixedly installed on the fixing seat 51, and a spherical groove 53 is opened on the circular ring block 52, and a ball head 54 is slidably installed inside the spherical groove 53, and a connecting rod 55 is fixedly installed at one end of the ball head 54. In the initial state, when the warning flag is at rest and not disturbed by external force, the ball head 54 is stably located in the spherical groove 53 of the circular ring block 52, and the elastic rod 57 is in a naturally vertical state. The flag surface 512 is maintained in a fixed position by the cooperation of the vertical rod 511, the threaded block 59 and the threaded sleeve 510. During the driving process of the vehicle frame 1, the elastic rod 57 moves slightly, so that the warning flag body swings slightly, and more The ball head 54 rotates at multiple angles in the spherical groove 53 to make the warning flag more eye-catching. When the warning flag is subjected to external force, such as being hit, the ball head 54 rotates at multiple angles in the spherical groove 53. This rotation characteristic enables the warning flag to flexibly respond to changes in the direction of the external force. A counterweight 56 ​​is fixedly installed on the connecting rod 55, and one end of an elastic rod 57 is fixedly installed on the other end of the ball head 54. At the same time, the connecting rod 55 connects the ball head 54 and the counterweight 56. The gravity of the counterweight 56 ​​will produce a stable torque to help the elastic rod 57 to better maintain a vertical state after deformation. When the external force disappears, the elastic rod 57 automatically resets after bending due to its own elastic restoring force, ensuring that the warning flag is always in a relatively stable warning state. When the height of the flag surface 512 needs to be adjusted, the other end of the elastic rod 57 is fixedly connected to the hydraulic support rod 58 fixed end, the bottom end of the movable end of the hydraulic support rod 58 is fixedly installed with a threaded block 59, and a threaded sleeve 510 is threadedly installed on the threaded block 59. The bottom end of the vertical rod 511 is clamped inside the threaded block 59. The vertical rod 511 is sleeved on the inner side of the vertical section of the flag surface 512. A reflective mark 513 is set on the flag surface 512, and the reflective mark 513 is in an "X" shape. A cross bar 514 is sleeved on the inner side of the horizontal section of the flag surface 512. When the operator presses the hydraulic support rod 58, the movable end of the hydraulic support rod 58 will produce an upward or downward linear motion, thereby driving the threaded block 59 connected to the movable end, the vertical rod 511 and the flag surface 512 to move up and down. When the hydraulic support rod 58 is released, the hydraulic structure inside it can be automatically reset. When installing and disassembling the flag surface 512, first remove the vertical rod 51 1 The bottom end is clamped on the thread block 59, and then the threaded sleeve 510 is tightened along the thread of the thread block 59, so that the flag surface 512 can be firmly installed, and during the warning process, a top cylinder 515 is fixedly installed on the top of the movable end of the hydraulic support rod 58, and an L-shaped groove 516 is opened on the top cylinder 515. The top of the vertical rod 511 is clamped on the inner side of the L-shaped groove 516, and the cross bar 514 passes through the L-shaped groove 516. A servo cylinder 517 is fixedly installed on the bottom surface of the top cylinder 515, and a rack 518 is fixedly installed on the piston end of the servo cylinder 517. A hinge seat 519 is fixedly installed on the servo cylinder 517. A gear 520 is rotatably installed inside the hinge seat 519, and the rack 518 meshes with the gear 520. The rectangular outer wall of the gear 520 is fixedly connected to the outer wall of the cross bar 514. In addition,The vertical rod 511, the flag 512, the reflective mark 513, the cross bar 514, the L-shaped groove 516, the servo cylinder 517, the rack 518, the hinge seat 519 and the gear 520 are arranged in three groups, and the three groups of vertical rods 511, the flag 512, the reflective mark 513, the cross bar 514, the L-shaped groove 516, the servo cylinder 517, the rack 518, the hinge seat 519 and the gear 520 are arranged in a circular array with equal spacing with the center of the circular cross section of the hydraulic support rod 58 as the center of the array, thereby increasing the warning display area and improving the warning effect. When the warning flag is to be stored, the servo cylinder 517 is started, and the piston end of the servo cylinder 517 moves upward in a straight line, thereby driving the rack 518 connected thereto to move upward. The rack 518 meshes with the gear 520 in the hinge seat 519, and the linear motion of the rack 518 is converted into the circular rotation of the gear 520. The gear 520 is fixedly connected to the cross bar 514, so the rotation of the gear 520 drives the cross bar 514 to move. The cross bar 514 is connected to the flag surface 512, and then drives the flag surface 512 to move, so that the flag surface 512 can be stored, and the warning flag can be stored conveniently.

[0038] In one embodiment of the present invention, an alarm component 6 is provided on the top tube 515, and the alarm component 6 includes a top cover 61, and the top cover 61 is clamped on the top of the top tube 515. An arc groove 62 is opened on the top tube 515, and a circular plate 63 is fixedly installed on the inner side of the top of the top tube 515. In addition, an ultrasonic sensor 64 is fixedly installed on the top of the circular plate 63. The ultrasonic sensor 64 includes a transmitter 641 and a receiver 642. Further, when the alarm component 6 is in a standby working state, the transmitter 641, the receiver 642, the microcontroller 65 and the warning light 66 are all powered on and ready to run. The transmitter 641 emits ultrasonic pulses to the surrounding space at a set time interval. These ultrasonic pulses propagate in the air at a speed of 340m / s. When the ultrasonic waves encounter the target objects in front, such as approaching vehicles and pedestrians, they will be reflected back. The reflected ultrasonic waves are received by the receiver 642. There is a time difference between the transmitter 641 emitting the ultrasonic waves and the receiver 642 receiving the reflected ultrasonic waves. According to the fixed propagation speed of ultrasonic waves in the air of 340m / s, the ultrasonic waves are reflected back by the receiver 642. s, using the formula "distance = speed of sound × time difference ÷ 2", the distance between the ultrasonic sensor 64 and the target object can be calculated. The reason for dividing by 2 here is that the ultrasonic wave propagates to the target object and then reflects back, and the distance traveled is twice the distance between the sensor and the target object. A distance threshold is preset inside the microcontroller 65. The microcontroller 65 is fixedly installed on the top center of the circular plate 63, and a warning light 66 is fixedly installed on the top of the top cover 61. In addition, four groups of arc grooves 62 and ultrasonic sensors 64 are provided, and the four groups of arc grooves 62 and ultrasonic sensors 64 are all arranged in a circular array with equal spacing around the center of the circular cross section of the circular plate 63 as the array center, so as to better perform multi-directional approach distance alarm. When the calculated distance is less than or equal to the set threshold, the microcontroller 65 will determine that there is a potential danger at this time and an alarm signal needs to be issued. Therefore, the microcontroller 65 sends a control instruction to the warning light 66. After receiving the instruction, the warning light 66 starts to work at a specific flashing frequency or light emission mode, and issues a warning to the surrounding personnel with a striking visual signal to remind them to pay attention to possible dangers.

[0039] In one embodiment of the present invention, an auxiliary component 7 is provided at the bottom end of the hydraulic support rod 58, and the auxiliary component 7 includes a threaded rod 71, and the threaded rod 71 is threadedly installed inside the counterweight block 56, and a knob 72 is fixedly installed at one end of the threaded rod 71. In addition, a limiting groove 73 is provided on the frame *1, and the threaded rod 71 passes through the limiting groove 73. A nut 74 is threadedly installed at the other end of the threaded rod 71, and the outer wall of the nut 74 slides and fits the inner side of the frame 1. In addition, the limiting groove 73 is semicircular, and the center center projection of the ball head 54 in the vertical direction coincides with the cross-sectional center of the limiting groove 73 in the vertical direction, so as to better constrain the movement direction of the hydraulic support rod 58. Furthermore, in the initial state, the threaded rod 71 is not screwed into the counterweight block 56, and the warning flag can swing freely in all directions. When the movement of the warning flag needs to be limited When the locking nut 77 is in the state of being moved forward and backward, the locking nut 77 is in the state of being moved forward and backward, so that the locking nut 77 can be locked in the state of being moved forward and backward, so that the locking nut 77 can be locked in the state of being moved forward and backward, and the locking nut 77 can be locked in the state of being moved forward and backward, so that the locking nut 77 can be locked in the state of being moved forward and backward, and the locking nut 77 can be locked in the state of being moved forward and backward, and the locking nut 77 can be locked in the state of being moved

[0040] Among them, the electrical components appearing in this application document are all electrically connected to the controller, and the controller is a conventional known device that can control the servo cylinder 517, ultrasonic sensor 64, transmitter 641, receiver 642, microcontroller 65 and warning light 66, and the frame 1 is provided with an air source for the servo cylinder 517. The standard parts used in this application document can all be purchased from the market, and the specific connection methods of each part are connected by conventional means such as mature rivets and welding in the prior art, and the machinery, parts and equipment are all conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0041] Working principle: In the initial state, when the warning flag is stationary and not disturbed by external forces, the ball head 54 is stably located in the spherical groove 53 of the annular block 52, the elastic rod 57 is in a naturally vertical state, and the flag surface 512 is kept in a fixed position by the cooperation of the vertical rod 511, the threaded block 59 and the threaded sleeve 510. During the driving process of the frame 1, the elastic rod 57 moves slightly, so that the warning flag body swings slightly, which is more eye-catching. When the warning flag is subjected to external forces, such as being hit, the ball head 54 rotates at multiple angles in the spherical groove 53. This rotational characteristic enables the warning flag to flexibly respond to changes in the direction of external forces. At the same time, the connecting rod 55 connects the ball head 54 and the counterweight 56. The gravity of the counterweight 56 ​​will generate a stable torque to help the elastic rod 57 to better maintain a vertical state after deformation. When the external force disappears, the elastic rod 57 automatically resets after bending by its own elastic restoring force, ensuring that the warning flag is always in a relatively stable warning state. When the height of the flag surface 512 needs to be adjusted, the operator presses the hydraulic support rod 58, and the activity of the hydraulic support rod 58 The movable end will produce an upward or downward linear motion, thereby driving the threaded block 59, the vertical rod 511 and the flag 512 connected to the movable end to move up and down. The hydraulic support rod 58 is loosened, and the hydraulic structure inside it can automatically reset. When installing and removing the flag 512, the bottom end of the vertical rod 511 is first clamped on the threaded block 59, and then the threaded sleeve 510 is tightened along the thread of the threaded block 59. In this way, the flag 512 can be firmly installed. In the warning process, when the flag 512 needs to be retracted for storage, the servo cylinder 517 is started. The piston end of the servo cylinder 517 will move linearly upward, thereby driving the rack 518 connected thereto to move upward, and the rack 518 is meshed with the gear 520 in the hinge seat 519, and the linear motion of the rack 518 is converted into the circular rotation of the gear 520, and the gear 520 is fixedly connected to the cross bar 514, so the rotation of the gear 520 will drive the cross bar 514 to move, and the cross bar 514 is connected to the flag 512, thereby driving the flag 512 to move, realizing the folding action of the flag 512, which is convenient for storing the warning flag.

[0042] Furthermore, when the alarm component 6 is in the standby working state, the transmitter 641, the receiver 642, the microcontroller 65 and the warning light 66 are all powered on and ready to run. The transmitter 641 transmits ultrasonic pulses to the surrounding space at a set time interval. These ultrasonic pulses propagate in the air at a speed of 340 m / s. When the ultrasonic wave encounters a target object in front, such as an approaching vehicle or pedestrian, it will be reflected back. The reflected ultrasonic wave is received by the receiver 642. There is a time difference between the transmitter 641 transmitting the ultrasonic wave and the receiver 642 receiving the reflected ultrasonic wave. According to the fixed propagation speed of ultrasonic wave in the air of 340 m / s, using the formula " Distance = speed of sound × time difference ÷ 2", the distance between the ultrasonic sensor 64 and the target object can be calculated. The reason for dividing by 2 here is that the distance traveled by the ultrasonic wave after it propagates to the target object and then reflects back is twice the distance between the sensor and the target object. A distance threshold is preset inside the microcontroller 65. When the calculated distance is less than or equal to the set threshold, the microcontroller 65 will determine that there is a potential danger at this time and an alarm signal needs to be issued. Therefore, the microcontroller 65 sends a control instruction to the warning light 66. After receiving the instruction, the warning light 66 starts to work at a specific flashing frequency or light-emitting mode, and sends a warning to the surrounding people with a striking visual signal, reminding them to pay attention to the possible danger.

[0043] When the locking nut 74 is in the unlocking state, the locking nut 77 is in the unlocking state, and the locking nut 77 is in the unlocking state, so that the locking nut 77 can be locked.

[0044] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A multifunctional warning flag, comprising a frame (1), a universal wheel (2) being arranged at the bottom end of the frame (1), a hook (3) being fixedly mounted at the top end of the frame (1), and a connecting frame (4) being fixedly mounted at the rear end of the frame (1), characterized in that: The vehicle frame (1) is provided with a warning component (5), and the warning component (5) comprises: A fixing seat (51), the outer wall of the vehicle frame (1) is fixedly mounted with the fixing seat (51), a circular ring block (52) is fixedly mounted on the fixing seat (51), a spherical groove (53) is provided on the circular ring block (52), a ball head (54) is slidably mounted inside the spherical groove (53), a connecting rod (55) is fixedly mounted on one end of the ball head (54), a counterweight block (56) is fixedly mounted on the connecting rod (55), one end of an elastic rod (57) is fixedly mounted on the other end of the ball head (54), and the other end of the elastic rod (57) is fixedly connected to the fixed end of a hydraulic support rod (58); A threaded block (59), a threaded block (59) is fixedly installed at the bottom end of the movable end of the hydraulic support rod (58), a threaded sleeve (510) is threadedly installed on the threaded block (59), the bottom end of a vertical rod (511) is clamped inside the threaded block (59), the vertical rod (511) is sleeved on the inner side of the vertical section of the flag surface (512), a reflective mark (513) is arranged on the flag surface (512), the reflective mark (513) is in an "X" shape, a cross bar (514) is sleeved on the inner side of the horizontal section of the flag surface (512), a top tube (515) is fixedly installed at the top of the movable end of the hydraulic support rod (58), an L-shaped groove (516) is opened on the top tube (515), the top end of the vertical rod (511) is clamped on the inner side of the L-shaped groove (516), and the cross bar (514) passes through the L-shaped groove (516); A servo cylinder (517), the servo cylinder (517) is fixedly installed on the bottom surface of the top cylinder (515), a rack (518) is fixedly installed on the piston end of the servo cylinder (517), a hinge seat (519) is fixedly installed on the servo cylinder (517), a gear (520) is rotatably installed inside the hinge seat (519), the rack (518) meshes with the gear (520), and the rectangular outer wall of the gear (520) is fixedly connected to the outer wall of the cross bar (514).

2. A multifunctional warning flag according to claim 1, characterized in that: The universal wheels (2) are provided in four groups.

3. A multifunctional warning flag according to claim 1, characterized in that: The vehicle frame (1) is connected to the fuel truck body via a connecting frame (4).

4. A multifunctional warning flag according to claim 1, characterized in that: The vertical rod (511), the flag (512), the reflective mark (513), the cross rod (514), the L-shaped groove (516), the servo cylinder (517), the rack (518), the hinge seat (519) and the gear (520) are arranged in three groups, and the three groups of the vertical rod (511), the flag (512), the reflective mark (513), the cross rod (514), the L-shaped groove (516), the servo cylinder (517), the rack (518), the hinge seat (519) and the gear (520) are arranged in a circular array with equal spacing, with the center of the circular cross section of the hydraulic support rod (58) as the center of the array.

5. A multifunctional warning flag according to claim 1, characterized in that: The top tube (515) is provided with an alarm component (6), the alarm component (6) comprises a top cover (61), the top end of the top tube (515) is clamped with the top cover (61), an arc groove (62) is provided on the top tube (515), and a circular plate (63) is fixedly mounted on the inner side of the top end of the top tube (515).

6. A multifunctional warning flag according to claim 5, characterized in that: An ultrasonic sensor (64) is fixedly mounted on the top of the circular plate (63), and the ultrasonic sensor (64) comprises a transmitter (641) and a receiver (642). A microcontroller (65) is fixedly mounted on the center top of the circular plate (63), and a warning light (66) is fixedly mounted on the top of the top cover (61).

7. A multifunctional warning flag according to claim 6, characterized in that: Four groups of arc-shaped grooves (62) and ultrasonic sensors (64) are provided, and the four groups of arc-shaped grooves (62) and ultrasonic sensors (64) are arranged in a circular array with equal spacing, with the center of the circular cross section of the circular plate (63) as the center of the array.

8. A multifunctional warning flag according to claim 1, characterized in that: An auxiliary component (7) is arranged at the bottom end of the hydraulic support rod (58), and the auxiliary component (7) comprises a threaded rod (71). The threaded rod (71) is installed with internal threads of the counterweight block (56), and a knob (72) is fixedly installed at one end of the threaded rod (71).

9. A multifunctional warning flag according to claim 8, characterized in that: The frame (1) is provided with a limiting groove (73), the threaded rod (71) passes through the limiting groove (73), a nut (74) is threadedly mounted on the other end of the threaded rod (71), and the outer wall of the nut (74) is slidably fitted on the inner side of the frame (1).

10. A multifunctional warning flag according to claim 9, characterized in that: The limiting groove (73) is semicircular in shape, and the projection of the center circle of the ball head (54) in the vertical direction coincides with the center circle of the cross section of the limiting groove (73) in the vertical direction.

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