CN112079320A

CN112079320A - Protection device for preventing fire and oil outflow during atomizing cooling of oiling machine

Info

Publication number: CN112079320A
Application number: CN202010989487.6A
Authority: CN
Inventors: 刘涯
Original assignee: Hangzhou Gangfang Machinery Technology Co ltd
Current assignee: Hangzhou Gangfang Machinery Technology Co ltd
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2020-12-15

Abstract

The invention discloses a protection device for preventing fire and oil outflow by spraying and cooling an oiling machine, which comprises a frame, the frame is provided with a protection cavity, the protection cavity is internally provided with an emergency cutoff fire-extinguishing mechanism, the left end and the right end of the frame are provided with anti-collision mechanisms, the upper end of the frame is provided with the spray cooling mechanism, the invention has simple structure and higher integration degree, and when the temperature is high in summer, spraying mechanism can effectively reduce the temperature of the whole environment of filling station, improves the air humidity of filling station, reduces the probability that the spark produced, is equipped with anemorumbometer, has effectively avoided a large amount of water smoke to be blown the produced potential safety hazard on the tanker aircraft in the reverse direction, anticollision institution can prevent vehicle direct impact tanker aircraft, promptly cuts off the supply of water and fluid simultaneously on the physical aspect of fire extinguishing mechanism, the emergence of initiative prevention conflagration falls the potential safety hazard to minimumly.

Description

Protection device for preventing fire and oil outflow during atomizing cooling of oiling machine

Technical Field

The invention relates to the field of green and environment-friendly equipment, in particular to a protection device for preventing fire and oil outflow during spray cooling of an oiling machine.

Background

As is known well, gas stations generally all set up outdoors, the oil commodity that gas stations sold has the flammable characteristics of exploding, easily volatilize, easy seepage, easily gather the static charge, high temperature can increase petrol and volatilize summer, the increase of petrol concentration can produce very big potential safety hazard in the air, cooling measures such as air conditioner can't be installed again to outdoor space, in addition, often have the driver to forget after adding oil and pull out oil pipe and just start the vehicle and drive away from, very big potential safety hazard has been produced, in case cause the conflagration only rely on the staff to use the fire extinguisher temporarily fear dangerous and inefficiency, consequently need design a protection device that tanker aircraft spraying cooling fire prevention grease proofing outflow of preventing to solve above-mentioned problem.

Disclosure of Invention

The invention aims to provide a protection device for preventing fire and oil outflow during atomizing temperature reduction of an oiling machine, which is used for overcoming the defects in the prior art.

The invention is realized by the following technical scheme. The invention relates to a protection device for preventing fire and oil outflow during atomizing temperature reduction of an oiling machine, which comprises a frame, wherein a protection cavity is arranged in the frame;

an emergency cutoff fire extinguishing mechanism is arranged in the protection cavity, an anti-collision mechanism is arranged at the left end and the right end of the frame, a spray cooling mechanism is arranged at the upper end of the frame, a first fixed block, a second fixed block, a third fixed block and a fourth fixed block are sequentially and fixedly arranged at the left end of the protection cavity from top to bottom, a fire extinguisher and an oiling machine are sequentially and fixedly arranged at the lower end of the protection cavity from left to right, a first rotating shaft is rotatably arranged on the first fixed block, a first gear and a first belt pulley are sequentially and fixedly arranged on the first rotating shaft from front to back, rack rods with upper ends and lower ends respectively provided with racks in different directions are slidably arranged on the second fixed block, the first gear can be meshed with the racks at the upper ends of the rack rods, a first fixed shaft which is symmetrical from front to back is fixedly arranged at the right end of the third fixed block, a sector gear is hinged on, the lower end of the sector gear is fixedly provided with a clamping rod, the left end of the oiling machine is fixedly provided with an oil pipe penetrating through the fourth fixed block, the lower end of the clamping rod can clamp the oil pipe, the right end of the oil pipe is fixedly provided with an oiling gun inserted into a slot on the oiling machine, the oil pipe is fixedly provided with a safety ring, a fuse is connected between the upper end of the safety ring and the lower end of the fourth fixed block, the lower end of the left end wall of the frame is internally fixed with a water inlet valve, the upper end of the water inlet valve is fixedly provided with a water inlet pipe, the left end wall of the protection cavity is provided with a rod chute, a first sliding rod is arranged in the rod chute in a sliding manner, the right end of the first sliding rod is fixedly provided with a second hinged shaft, the rack rod is fixedly provided with a third hinged shaft, a first connecting rod is hinged between the second hinged shaft and the third hinged, the fire extinguisher is characterized in that a safety bolt is arranged at the upper end of the fire extinguisher in a sliding mode, and a safety rope is connected and arranged at the left end of the safety bolt and the lower end of the safety ring.

Preferably, the fixed headstock that is equipped with in frame upper end, including the power cavity in the power cavity, power cavity rear end wall from left to right rotates in proper order and is equipped with second axis of rotation, sixth axis of rotation, fourth axis of rotation, the second axis of rotation is fixed third belt pulley, the second belt pulley of being equipped with in proper order after to in the front, the second belt pulley with it is equipped with first belt to connect between the first belt pulley, the sixth axis of rotation is fixed ninth belt pulley, the fifth belt pulley of being equipped with in proper order after to in the front, the fifth belt pulley with it is equipped with the second belt to connect between the third belt pulley, the fourth axis of rotation is fixed seventh belt pulley, second bevel gear in proper order after to in the front, the fixed fifth fixed block that is equipped with in power cavity upper end, it is equipped with the third axis of rotation on the fifth fixed block, the third axis of rotation is fixed sixth belt pulley of being equipped with in, The fourth belt is connected between the sixth belt pulley and the seventh belt pulley, a motor is fixedly arranged at the lower end of the power cavity, a motor shaft is arranged at the front end of the motor in a rotating mode, the fourth belt pulley is fixedly arranged at the front end of the motor shaft, a third belt is connected between the fourth belt pulley and the ninth belt pulley, a first hydraulic rod is fixedly arranged at the upper end of the motor, and push-pull rods which are symmetrical in the front-back mode are fixedly arranged at the front end of the first hydraulic rod.

Preferably, a first hinged shaft is fixedly arranged at the front end of the power cavity, a swinging rod is hinged to the first hinged shaft, an atomizing pipe is fixedly arranged at the lower end of the swinging rod, a spray head is fixedly arranged at the front end of the atomizing pipe, the rear end of the atomizing pipe is communicated with the upper end of the water inlet pipe, a fifth rotating shaft is arranged at the lower end of the power cavity in a rotating mode, a first bevel gear and a cam are sequentially and fixedly arranged on the fifth rotating shaft from top to bottom, the first bevel gear can be meshed with a second bevel gear, the cam can push the swinging rod to swing, a wind speed and direction detector is fixedly arranged at the right end of the power cavity, and a wind measuring rod is arranged at the upper end.

Preferably, the left end and the right end of the frame are fixedly provided with a bilateral symmetry buffer mechanism and an up-down symmetry buffer mechanism, the outer end of the buffer mechanism is fixedly provided with an anti-collision plate, and the front end of the frame is fixedly provided with a bilateral symmetry infrared inductor.

The invention has the beneficial effects that: the anti-collision device is simple in structure and high in integration degree, the spraying mechanism can effectively reduce the temperature of the whole environment of the gas station at high temperature in summer, improve the air humidity of the gas station and reduce the probability of spark generation, the anti-collision device is provided with the anemorumbometer, the potential safety hazard generated when a large amount of water mist is blown to the oiling machine reversely is effectively avoided, the anti-collision mechanism can prevent vehicles from directly colliding with the oiling machine, the emergency cut-off fire extinguishing mechanism simultaneously cuts off the supply of water and oil liquid on the physical level, the occurrence of fire is actively prevented, and the potential safety hazard is reduced to the minimum.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of FIG. 1;

FIG. 3 is an enlarged schematic view of A in FIG. 2;

FIG. 4 is an enlarged schematic view of B of FIG. 2;

FIG. 5 is an enlarged schematic view of C in FIG. 2;

FIG. 6 is a schematic diagram of D-D of FIG. 3;

fig. 7 is a schematic diagram of the structure of E-E in fig. 5.

Detailed Description

The invention will now be described in detail with reference to fig. 1-7, wherein for ease of description the orientations described below are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The protection device for mist cooling, fire prevention and oil outflow prevention of the oiling machine comprises a frame 10, a protection cavity 34 is arranged in the frame 10, an emergency cutoff fire extinguishing mechanism 85 is arranged in the protection cavity 34, anti-collision mechanisms 80 are arranged at the left end and the right end of the frame 10, a mist cooling mechanism 90 is arranged at the upper end of the frame 10, a first fixed block 22, a second fixed block 21, a third fixed block 20 and a fourth fixed block 19 are sequentially and fixedly arranged at the left end of the protection cavity 34 from top to bottom, a fire extinguisher 13 and the oiling machine 11 are sequentially and fixedly arranged at the lower end of the protection cavity 34 from left to right, a first rotating shaft 25 is rotatably arranged on the first fixed block 22, a first gear 24 and a first belt pulley 23 are sequentially and fixedly arranged on the first rotating shaft 25 from front to back, a rack rod 68 is slidably arranged on the second fixed block 21, and the upper end and the lower end of the, the first gear 24 can be engaged with a rack at the upper end of the rack bar 68, the right end of the third fixed block 20 is fixedly provided with a first fixed shaft 70 which is symmetrical front and back, the first fixed shaft 70 is hinged with a sector gear 69, the sector gear 69 can be engaged with a rack at the lower end of the rack bar 68, the lower end of the sector gear 69 is fixedly provided with a clamping bar 71, the left end of the oiling machine 11 is fixedly provided with an oil pipe 12 which penetrates through the fourth fixed block 19, the lower end of the clamping bar 71 can clamp the oil pipe 12, the right end of the oil pipe 12 is fixedly provided with an oiling gun 72, the oiling gun 72 is inserted into a slot on the oiling machine 11, the oil pipe 12 is fixedly provided with a safety ring 16, a fuse 17 is connected between the upper end of the safety ring 16 and the lower end of the fourth fixed block 19, the lower end of the left end wall of the frame 10 is, the left end wall of protection chamber 34 is equipped with rod spout 73, it is equipped with first slide bar 64 to slide in the rod spout 73, the fixed second articulated shaft 65 that is equipped with of first slide bar 64 right-hand member, the fixed third articulated shaft 67 that is equipped with on the rack bar 68, second articulated shaft 65 with it is equipped with first connecting rod 66 to articulate between the third articulated shaft 67, first slide bar 64 can slide left extrusion water pipe and cut off the water supply, fire extinguisher 13 upper end slides and is equipped with safety bar 14, safety bar 14 left end with safety ring 16 lower extreme is connected and is equipped with safety rope 15.

Beneficially, the fixed power box 35 that is equipped with in frame 10 upper end, including power chamber 40 in the power box 35, power chamber 40 rear end wall from left to right rotates in proper order and is equipped with second axis of rotation 37, sixth axis of rotation 61, fourth axis of rotation 54, second axis of rotation 37 is fixed in proper order from the front to the back and is equipped with third belt pulley 38, second belt pulley 36 with it is equipped with first belt 26 to connect between first belt pulley 23, sixth axis of rotation 61 is fixed in proper order from the front to the back and is equipped with ninth belt pulley 60, fifth belt pulley 49 with it is equipped with second belt 39 to connect between the third belt pulley 38, fourth axis of rotation 54 is fixed in proper order from the front to the back and is equipped with seventh belt pulley 53, second bevel gear 62, power chamber 40 upper end is fixed and is equipped with fifth fixed block 58, fifth fixed block 58 rotates upward and is equipped with third axis of rotation 51, third axis of rotation 51 is fixed in proper order from the front to the back and is equipped with sixth belt pulley 50, eighth belt pulley 59, sixth belt pulley 50 with it is equipped with fourth belt 52 to connect between the seventh belt pulley 53, the fixed motor 43 that is equipped with of power chamber 40 lower extreme, the rotation of motor 43 front end is equipped with motor shaft 45, the fixed fourth belt pulley 44 that is equipped with of motor shaft 45 front end, fourth belt pulley 44 with it is equipped with third belt 46 to connect between the ninth belt pulley 60, the fixed first hydraulic stem 47 that is equipped with in motor 43 upper end, the fixed push-and-pull rod 48 that is symmetrical around being equipped with of first hydraulic stem 47 front end.

Beneficially, a first hinge shaft 42 is fixedly arranged at the front end of the power cavity 40, a swing rod 29 is hinged on the first hinge shaft 42, a spray pipe 27 is fixedly arranged at the lower end of the swing rod 29, a spray head 28 is fixedly arranged at the front end of the spray pipe 27, the rear end of the spray pipe 27 is communicated with the upper end of the water inlet pipe 32, a fifth rotating shaft 56 is rotatably arranged at the lower end of the power cavity 40, a first bevel gear 55 and a cam 57 are fixedly arranged on the fifth rotating shaft 56 from top to bottom in sequence, the first bevel gear 55 can be meshed with the second bevel gear 62, the cam 57 can push the swing rod 29 to swing, a wind speed detector 41 is fixedly arranged at the right end of the power cavity 40, and a wind measuring rod 30 is rotatably arranged at the upper end of the wind.

Beneficially, the left and right ends of the frame 10 are fixedly provided with the left and right symmetric and up and down symmetric buffer mechanisms 63, the outer ends of the buffer mechanisms 63 are fixedly provided with the anti-collision plates 33, and the front end of the frame 10 is fixedly provided with the left and right symmetric infrared sensors 18.

The use steps herein are described in detail below with reference to fig. 1-7: in high-temperature weather, the spraying and cooling mechanism starts to work, the first hydraulic rod 47 extends to drive the push-pull rod 48 to move forward, the push-pull rod 48 moves forward to drive the third belt 46 to move forward, the third belt 46 moves forward to connect the fourth belt pulley 44 with the eighth belt pulley 59, the motor 43 is started to drive the motor shaft 45 to rotate, the motor shaft 45 rotates to drive the fourth belt pulley 44 to rotate, the fourth belt pulley 44 rotates to drive the third belt 46 to rotate, the third belt 46 rotates to drive the eighth belt pulley 59 to rotate, the eighth belt pulley 59 rotates to drive the third rotating shaft 51 to rotate, the third rotating shaft 51 rotates to drive the fourth belt 52 to rotate, and the fourth belt 52 rotates to drive the seventh belt pulley 53 to rotate, the seventh belt pulley 53 rotates to drive the fourth rotating shaft 54 to rotate, the fourth rotating shaft 54 rotates to drive the second bevel gear 62 to rotate, the second bevel gear 62 rotates to drive the first bevel gear 55 to rotate, the first bevel gear 55 rotates to drive the fifth rotating shaft 56 to rotate, the fifth rotating shaft 56 rotates to drive the cam 57 to rotate, the cam 57 rotates to push the swinging rod 29 to swing around the first hinge shaft 42, the swinging rod 29 swings to drive the spraying pipe 27 to swing, the water inlet valve 31 is opened, cold water passes through the water inlet pipe 32, the spraying pipe 27 and the nozzle 28 and is sprayed into air in a water mist state, when the infrared sensor 18 senses that a vehicle drives into a refueling parking space, the water inlet valve 31 is closed, the water mist is reduced and suspended to prevent wetting personnel, and when the wind speed and direction detector 41 determines that the wind direction faces the refueling machine 11 at the moment through the wind measuring rod 30 and the wind speed is high, the wind speed detector 41 controls that the The water inlet valve 31 is closed, so that potential safety hazards caused by blowing of a large amount of water mist to the oiling machine 11 are prevented, the water mist can be cooled and dedusted, accidental sparks can be effectively prevented, and fire disasters are prevented.

When the vehicle is started to move forward without pulling the fuel truck nozzle 72 inserted on the fuel tank, the fuel truck nozzle 72 is pulled by the vehicle, the fuel truck nozzle 72 moves to drive the fuel pipe 12 to elongate, the fuel pipe 12 elongates to drive the safety ring 16 to move, when the fuel pipe 12 is pulled to an extreme position, the safety ring 16 continues to move to break the fuse 17, after the fuse 17 is broken, the first hydraulic rod 47 shortens to drive the push-pull rod 48 to move backward, the push-pull rod 48 moves backward to drive the third belt 46 to move backward, the third belt 46 moves backward to connect the fourth belt pulley 44 with the ninth belt pulley 60, the motor 43 is started to drive the motor shaft 45 to rotate, the motor shaft 45 rotates to drive the fourth belt pulley 44 to rotate, the fourth belt pulley 44 rotates to drive the third belt 46 to rotate, the third belt 46 rotates to drive the ninth belt pulley 60 to rotate, the ninth belt pulley 60 rotates to drive the sixth rotating shaft 61 to rotate, the sixth rotating shaft 61 rotates to drive the fifth belt pulley 49 to rotate, the fifth belt pulley 49 rotates to drive the second belt 39 to rotate, the second belt 39 rotates to drive the third belt pulley 38 to rotate, the third belt pulley 38 rotates to drive the second rotating shaft 37 to rotate, the second rotating shaft 37 rotates to drive the second belt pulley 36 to rotate, the second belt pulley 36 rotates to drive the first belt 26 to rotate, the first belt 26 rotates to drive the first belt pulley 23 to rotate, the first belt pulley 23 rotates to drive the first rotating shaft 25 to rotate, the first rotating shaft 25 rotates to drive the first gear 24 to rotate, the fourth belt pulley 44 rotates to drive the rack bar 68 to move downwards, the rack bar 68 moves downwards to drive the third hinge shaft 67 to move downwards, the third hinge shaft 67 moves downwards to drive the first link 66 to move leftwards, the first link 66 moves leftwards to drive the second hinge shaft 65 to move leftwards, the second hinge shaft 65 moves leftwards to drive the first slide bar 64 to slide leftwards, the first slide bar 64 slides leftwards to press the water inlet pipe 32 to cut off the water supply emergently, the water mist stops, the rack bar 68 moves downwards to drive the sector gear 69 to rotate around the first fixed shaft 70, the sector gear 69 rotates to drive the clamping bar 71 to rotate, the clamping bar 71 rotates to clamp the oil pipe 12 to cut off the oil supply emergently and prevent the whole oil pipe from being pulled out of the fuel dispenser 11, if the oil pipe is pulled out of the clamping bar 71, the oil pipe 12 moves to drive the safety ring 16 to move, the safety ring 16 moves to drive the safety rope 15 to move, the safety rope 15 moves to pull out the safety bolt 14, the fire extinguisher 13 automatically sprays dry powder after the safety bolt 14 is pulled out, the residual oil in the oil pipe is prevented from being ignited, and when a vehicle impacts the anti-collision plate 33, the frame 10 or the infrared inductor 18 senses high temperature, the emergency cut-off fire-extinguishing mechanism 85 also works to prevent water and oil from further enhancing the fire.

When a vehicle is accidentally collided to the fuel dispenser 11 from the side, the vehicle firstly collides to the anti-collision plate 33, the anti-collision plate 33 firstly absorbs a part of energy through the buffer mechanism 63, and the anti-collision plate 33 and the frame 10 can also protect the fuel dispenser 11 from destructive damage by means of deformation generated by self collision, so that potential safety hazards caused by leakage of oil liquid are effectively prevented.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a protection device that grease proofing outflow of tanker aircraft mist cooling fire prevention, includes the frame, its characterized in that: the frame is internally provided with a protection cavity; an emergency cutoff fire extinguishing mechanism is arranged in the protection cavity, an anti-collision mechanism is arranged at the left end and the right end of the frame, a spray cooling mechanism is arranged at the upper end of the frame, a first fixed block, a second fixed block, a third fixed block and a fourth fixed block are sequentially and fixedly arranged at the left end of the protection cavity from top to bottom, a fire extinguisher and an oiling machine are sequentially and fixedly arranged at the lower end of the protection cavity from left to right, a first rotating shaft is rotatably arranged on the first fixed block, a first gear and a first belt pulley are sequentially and fixedly arranged on the first rotating shaft from front to back, rack rods with upper ends and lower ends respectively provided with racks in different directions are slidably arranged on the second fixed block, the first gear can be meshed with the racks at the upper ends of the rack rods, a first fixed shaft which is symmetrical from front to back is fixedly arranged at the right end of the third fixed block, a sector gear is hinged on, the lower end of the sector gear is fixedly provided with a clamping rod, the left end of the oiling machine is fixedly provided with an oil pipe penetrating through the fourth fixed block, the lower end of the clamping rod can clamp the oil pipe, the right end of the oil pipe is fixedly provided with an oiling gun inserted into a slot on the oiling machine, the oil pipe is fixedly provided with a safety ring, a fuse is connected between the upper end of the safety ring and the lower end of the fourth fixed block, the lower end of the left end wall of the frame is internally fixed with a water inlet valve, the upper end of the water inlet valve is fixedly provided with a water inlet pipe, the left end wall of the protection cavity is provided with a rod chute, a first sliding rod is arranged in the rod chute in a sliding manner, the right end of the first sliding rod is fixedly provided with a second hinged shaft, the rack rod is fixedly provided with a third hinged shaft, a first connecting rod is hinged between the second hinged shaft and the third hinged, the fire extinguisher is characterized in that a safety bolt is arranged at the upper end of the fire extinguisher in a sliding mode, and a safety rope is connected and arranged at the left end of the safety bolt and the lower end of the safety ring.

2. The protection device for preventing fire and oil outflow of atomizing cooling of a fuel dispenser of claim 1, wherein: the fixed headstock that is equipped with in frame upper end, including the power chamber in the power chamber, power chamber rear end wall from left to right rotates in proper order and is equipped with second axis of rotation, sixth axis of rotation, fourth axis of rotation, the second axis of rotation is fixed third belt pulley, the second belt pulley of being equipped with in proper order after to in the front of the follow, the second belt pulley with it is equipped with first belt to connect between the first belt pulley, sixth axis of rotation is fixed ninth belt pulley, the fifth belt pulley of being equipped with in proper order after to the front of the follow, the fifth belt pulley with it is equipped with the second belt to connect between the third belt pulley, the fourth axis of rotation is fixed seventh belt pulley, second bevel gear in proper order after to the front of the follow, the fixed fifth fixed block that is equipped with in power chamber upper end, it is equipped with the third axis of rotation to rotate on the fifth fixed block, the third axis of rotation, The fourth belt is connected between the sixth belt pulley and the seventh belt pulley, a motor is fixedly arranged at the lower end of the power cavity, a motor shaft is arranged at the front end of the motor in a rotating mode, the fourth belt pulley is fixedly arranged at the front end of the motor shaft, a third belt is connected between the fourth belt pulley and the ninth belt pulley, a first hydraulic rod is fixedly arranged at the upper end of the motor, and push-pull rods which are symmetrical in the front-back mode are fixedly arranged at the front end of the first hydraulic rod.

3. The protection device for preventing fire and oil outflow of atomizing cooling of a fuel dispenser of claim 2, wherein: the improved spraying device is characterized in that a first hinged shaft is fixedly arranged at the front end of the power cavity, a swinging rod is hinged to the first hinged shaft, a spraying pipe is fixedly arranged at the lower end of the swinging rod, a spray head is fixedly arranged at the front end of the spraying pipe, the rear end of the spraying pipe is communicated with the upper end of the water inlet pipe, a fifth rotating shaft is arranged at the lower end of the power cavity in a rotating mode, a first bevel gear and a cam are sequentially and fixedly arranged on the fifth rotating shaft from top to bottom, the first bevel gear can be meshed with a second bevel gear, the cam can push the swinging rod to swing, a wind speed and direction detector is fixedly arranged at the right end of the power cavity, and.

4. The protection device for preventing fire and oil outflow of atomizing cooling of a fuel dispenser of claim 2, wherein: the infrared sensor is characterized in that a left-right symmetric buffer mechanism and a top-bottom symmetric buffer mechanism are fixedly arranged at the left end and the right end of the frame, an anti-collision plate is fixedly arranged at the outer end of the buffer mechanism, and a left-right symmetric infrared sensor is fixedly arranged at the front end of the frame.