CN115305983A

CN115305983A - Dustproof device for engineering machinery vehicle

Info

Publication number: CN115305983A
Application number: CN202211130727.2A
Authority: CN
Inventors: 张江辉; 贾杨; 周涛; 杨杰; 秦翔; 刘洪伟; 王晓琴
Original assignee: Qingdao University of Science and Technology; Zhongqing Jianan Construction Group Co Ltd
Current assignee: Qingdao University of Science and Technology; Zhongqing Jianan Construction Group Co Ltd
Priority date: 2022-09-16
Filing date: 2022-09-16
Publication date: 2022-11-08
Anticipated expiration: 2042-09-16
Also published as: CN115305983B

Abstract

The invention belongs to the technical field of engineering machinery, and particularly relates to a dustproof device of an engineering machinery vehicle. This engineering machine vehicle dust keeper includes the excavator body, the bottom of the forearm of excavator body is equipped with fixed box, and the bottom of fixed box is the opening design, two L shaped plates of the equal symmetrical fixedly connected with in side around fixed box, run through on the L shaped plate and seted up the fixed orifices. When the excavator body is loading soil material or building stones, can remove the outlet pipe to the position relative with bucket bottom opening through the mating reaction of hydraulic stem and arm-tie, when soil material and building stones are poured from the bucket, the nozzle can spout water smoke, thereby spray the dust fall to the raise dust that building stones and soil material produced, and then reduce the production of excavator body at the in-process raise dust of feeding, after the excavator body is loaded and is accomplished, the bottom at excavator body forearm can be received to the outlet pipe, from not influencing the normal function of digging of excavator body.

Description

Dustproof device for engineering machinery vehicle

Technical Field

The invention belongs to the technical field of engineering machinery, and particularly relates to a dustproof device of an engineering machinery vehicle.

Background

Machines such as excavators, loaders, and bulldozers are important construction equipment for building construction. The excavator can be mainly used for excavating the ground and loading some soil materials and stones, but a large amount of dust can be generated by the soil materials and stones during the loading process of the excavator, particularly when the soil materials and stones are loaded and unloaded, and the dust is a main source of dust at a construction site.

In order to reduce the dust emission at the construction site, the prior solutions are mostly methods such as enclosure spraying, local water spraying, soil material and stone material spraying, carrier vehicle covering and the like, but the methods are all that dust fall treatment is carried out after the dust is diffused. Furthermore, existing dust protection devices are essentially not disposable during loading of the excavator due to the high loading height, at which time dust is spread.

Therefore, it is necessary to provide a dust-proof device for a construction machine vehicle to solve the above problems.

Disclosure of Invention

In view of the above problems, the present invention provides a dust-proof device for engineering machinery vehicle to solve the problems in the background art.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an engineering machinery vehicle dust keeper, includes the excavator body, the bottom of the forearm of excavator body is equipped with fixed box, and the bottom of fixed box is the open design, two L shaped plates of the equal symmetrical fixedly connected with in side around fixed box, run through on the L shaped plate and seted up the fixed orifices, and run through in the fixed orifices of two relative L shaped plates and peg graft and have same clamp plate, the top screw thread of clamp plate runs through and pegs graft and has the set screw, the inside of fixed box is equipped with transmission, the bottom of fixed box is equipped with water jet equipment, and the position of fighting of water jet equipment and excavator body is close to.

Further, transmission includes the hydraulic stem, the hydraulic stem runs through the one side of pegging graft and keeping away from water jet equipment at fixed box, the one end fixedly connected with first slider that the hydraulic stem is located fixed box, the one end that the hydraulic stem is located fixed box outside is connected with hydraulic pressure oil pipe, and hydraulic pressure oil pipe is connected with the hydraulic system of excavator body, one side that the hydraulic stem was kept away from to first slider is equipped with the dog, dog and fixed box inner wall fixed connection, the bottom of first slider is rotated and is connected with the arm-tie, and the arm-tie is parallel with the dog bottom, one side that first slider was kept away from to the dog is equipped with the second slider, second slider slidable mounting is in fixed box, the relative position of fixed box front and back side and second slider all runs through the spacing hole of seting up the bar, the equal fixedly connected with stopper in both ends of second slider, and the stopper keep away from the one end of second slider and lie in outside fixed box through the corresponding spacing hole, the part that the stopper is located fixed box outside the fixed box slides and pegs graft and has the spacing rod in the direction that is parallel with the fixed box, the equal fixedly connected with the fixed block in both ends of spacing rod, and cup joint, the spring is located one side that the spring is close to the spring.

Furthermore, water jet equipment includes the outlet pipe, the length of outlet pipe and the width phase-match of bucket, the top center department of outlet pipe rotates with the bottom of second slider to be connected, one side that the outlet pipe is close to the bucket is connected with a plurality of nozzles, the part that the outlet pipe top is close to its one end rotates with the bottom of arm-tie to be connected, the top fixedly connected with triangle-shaped locating plate of outlet pipe, one side of locating plate slope is relative with the arm-tie, the bottom center department of outlet pipe is connected with the inlet tube, the one end that the outlet pipe was kept away from to the inlet tube is connected with the water tank, the water tank is connected with the fuselage part fixed connection of excavator body, and installs the water pump in the water tank.

Furthermore, one side of the water outlet pipe, which is close to the excavator bucket, is provided with an arc-shaped protection plate, two ends of the arc-shaped protection plate are vertically and fixedly connected with baffle plates, the two baffle plates are respectively positioned at two ends of the water outlet pipe, the baffle plates are inserted with fixing shafts in a penetrating manner, one ends of the fixing shafts, which are close to the water outlet pipe, are rotatably connected with the circle center of the water outlet pipe, gears are fixedly sleeved at free ends of the fixing shafts, which are close to the pull plate, the tops of the gears correspond to the positions, teeth are annularly arranged at the bottoms of the pull plate, and the teeth are meshed with the gears.

Furthermore, the top of arc guard plate slides to peg graft there is rather than length assorted fly leaf, the perpendicular fixedly connected with in top of fly leaf has length assorted roof with it, the bottom of arc guard plate is equipped with length assorted bottom plate with it, bottom plate and outlet pipe fixed connection, and the bottom plate is located the bottom of nozzle, the recess has been seted up at the bottom plate top, and the recess is parallel with the outlet pipe, the magnetic stripe is all installed to the bottom of in the recess and arc guard plate, and the magnetic pole that two magnetic stripes are relative is opposite magnetic pole.

Furthermore, two clamping grooves are formed in the top of the pressing plate in a direction parallel to the front side of the pressing plate, two sides of each clamping groove are communicated with two sides of the pressing plate respectively, the two clamping grooves are opposite to the two L-shaped plates respectively, and the width of each clamping groove is the same as the thickness of each L-shaped plate.

Furthermore, the bottom of arm-tie rotates and is connected with fixed cover, fixed cover is relative with first slider position, and the inlet tube slides and pegs graft in fixed cover.

Further, a plurality of the nozzles are symmetrical about the center of the outlet pipe, and the free ends of the nozzles are inclined toward the end portion near the outlet pipe.

Furthermore, the sum of the length of the pulling plate and the half length of the water outlet pipe is greater than the maximum movement distance of the first sliding block, and the maximum movement distance of the second sliding block is equal to the half length of the water outlet pipe.

The invention has the technical effects and advantages that:

1. when the excavator body loads soil materials or stone materials, the water outlet pipe can be moved to a position opposite to an opening at the bottom of the excavator bucket through the matching action of the hydraulic rod and the pull plate, when the soil materials or the stone materials are poured out of the excavator bucket, the nozzles can spray water mist, so that dust generated by the stone materials and the soil materials is sprayed and reduced, the generation of the dust generated by the excavator body in the loading process is further reduced, and after the excavator body is loaded, the water outlet pipe can be collected at the bottom of the small arm of the excavator body, so that the normal excavating function of the excavator body is not influenced;

2. when the outlet pipe is received in the bottom position of excavator body forearm, the first half of fly leaf is located the outside of arc guard plate, and roof and bottom plate then are located the top and the bottom of nozzle respectively, the magnetic stripe of arc guard plate bottom and the magnetic stripe on the bottom plate can adsorb together simultaneously, thereby make the nozzle can be at the roof, the bottom plate, the baffle, the arc guard plate, the common mating reaction of fly leaf is down protected, and then avoid excavating the in-process or not the time spent, the nozzle is blockked up by dirt or dust, when the dust fall is sprayed to needs, the arm-tie can drive arc guard plate upward movement through the gear, and make the arc guard plate stagger with the nozzle of outlet pipe, and then can not exert an influence to the nozzle.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

In order to more clearly illustrate the embodiments of the present 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 some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a schematic perspective view of the excavator body forearm, bucket, water jet and transmission of the present invention;

FIG. 3 is a schematic perspective view of the water jet assembly and transmission of the present invention;

FIG. 4 is an internal perspective view of the mounting box of the present invention;

fig. 5 is a perspective view of the pull plate and the retaining sleeve of the present invention;

FIG. 6 is a perspective view of the outlet tube and base plate of the present invention;

fig. 7 is a perspective view of the arc-shaped protection plate, the movable plate, the top plate, the gear and the like in the invention.

In the figure: 1. an excavator body; 2. a fixing box; 3. an L-shaped plate; 4. pressing a plate; 5. fixing screws; 6. a transmission device; 60. a hydraulic lever; 61. a first slider; 62. a hydraulic oil pipe; 63. a stopper; 64. pulling a plate; 65. a second slider; 66. a limiting hole; 67. a limiting block; 68. a limiting rod; 69. a spring; 7. a water spraying device; 71. a water outlet pipe; 72. a nozzle; 73. positioning a plate; 74. a water inlet pipe; 75. a water tank; 76. a water pump; 8. an arc-shaped protection plate; 9. a baffle plate; 10. a fixed shaft; 11. a gear; 12. teeth; 13. a movable plate; 14. a top plate; 15. a base plate; 16. a magnetic strip; 17. a card slot; 18. a fixing sleeve.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides an engineering machinery vehicle dustproof device shown in figures 1-7, which comprises an excavator body 1, wherein a fixing box 2 is arranged at the bottom of a small arm of the excavator body 1, the bottom of the fixing box 2 is in an open design, two L-shaped plates 3 are symmetrically and fixedly connected to the front side and the rear side of the fixing box 2, fixing holes are formed in the L-shaped plates 3 in a penetrating mode, the same pressing plate 4 is inserted in the fixing holes of the two opposite L-shaped plates 3 in a penetrating mode, a fixing screw 5 is inserted in a penetrating mode through the top thread of the pressing plate 4, a transmission device 6 is arranged inside the fixing box 2, a water spraying device 7 is arranged at the bottom of the fixing box 2, the water spraying device 7 is close to the position of an excavator bucket of the excavator body 1, two clamping grooves 17 are formed in the direction that the top of the pressing plate 4 is parallel to the front side, the two sides of each clamping groove 17 are respectively communicated with the two sides of the pressing plate 4, the two clamping grooves 17 are respectively opposite to the two L-shaped plates 3, and the width of each clamping groove 17 is the same as the thickness of the L-shaped plate 3;

before the fixing box is used, the fixing box 2 is attached to the bottom of a small arm of an excavator body 1, the four L-shaped plates 3 are clamped on the front side and the rear side of the small arm respectively, then the two pressing plates 4 are inserted into fixing holes in the two opposite L-shaped plates 3 respectively, two clamping grooves 17 in the pressing plates 4 are clamped with the two L-shaped plates 3 respectively, then the fixing screws 5 are screwed, the fixing screws 5 can be tightly extruded with the top of the small arm, and therefore the fixing box 2 is fixed, and finally the transmission device 6 is connected with a hydraulic system of the excavator body 1;

when the excavator body 1 is used for loading soil materials or stone materials, the water spraying device 7 is moved to a position opposite to the bucket through the transmission device 6, the nozzle 72 of the water spraying device 7 is opposite to the bottom opening of the bucket, and when the soil materials and the stone materials are poured out of the bucket, the water spraying device 7 can spray water mist, so that dust generated by the stone materials and the soil materials is sprayed and reduced, and the generation of the dust generated by the excavator body 1 in the loading process is reduced;

after the excavator body 1 finishes loading, the transmission device 6 drives the water spraying device 7 to return to the original position and is collected at the bottom of the small arm of the excavator body 1, so that the normal excavating function of the excavator is not influenced.

As shown in fig. 1-6, the transmission device 6 includes a hydraulic rod 60, the hydraulic rod 60 is inserted into one side of the fixing box 2 far from the water spraying device 7, one end of the hydraulic rod 60 located in the fixing box 2 is fixedly connected with a first slide block 61, one end of the hydraulic rod 60 located outside the fixing box 2 is connected with a hydraulic oil pipe 62, the hydraulic oil pipe 62 is connected with a hydraulic system of the excavator body 1, one side of the first slide block 61 far from the hydraulic rod 60 is provided with a stop block 63, the stop block 63 is fixedly connected with the inner wall of the fixing box 2, the bottom of the first slide block 61 is rotatably connected with a pull plate 64, the pull plate 64 is parallel to the bottom of the stop block 63, one side of the stop block 63 far from the first slide block 61 is provided with a second slide block 65, the second slide block 65 is slidably mounted in the fixing box 2, the positions of the front side and the rear side of the fixing box 2 opposite to the second slide block 65 are both provided with a strip-shaped limiting hole 66, the front side and the rear side of the second sliding block 65 are fixedly connected with limiting blocks 67, one end of each limiting block 67, far away from the second sliding block 65, is positioned outside the fixed box 2 through a corresponding limiting hole 66, the part, outside the fixed box 2, of each limiting block 67 is in sliding, penetrating and inserting connection with a limiting rod 68 in a direction parallel to the fixed box 2, two ends of each limiting rod 68 are fixedly connected with fixed blocks, the fixed blocks are fixedly connected with the fixed box 2, a spring 69 is sleeved on each limiting rod 68, the spring 69 is positioned on one side, close to the hydraulic rod 60, of each limiting block 67, the bottom of each pulling plate 64 is rotatably connected with a fixed sleeve 18, the fixed sleeve 18 is opposite to the position of the first sliding block 61, a water inlet pipe 74 is in sliding and inserting connection with the fixed sleeve 18, the sum of the length of each pulling plate 64 and the half length of the water outlet pipe 71 is greater than the maximum movement distance of the first sliding block 61, the maximum movement distance of the second sliding block 65 is equal to half of the length of the water outlet pipe 71, the water spraying device 7 comprises a water outlet pipe 71, the length of the water outlet pipe 71 is matched with the width of the bucket, the center of the top of the water outlet pipe 71 is rotatably connected with the bottom of the second sliding block 65, one side, close to the bucket, of the water outlet pipe 71 is connected with a plurality of nozzles 72, the part, close to one end of the top of the water outlet pipe 71, of the water outlet pipe 71 is rotatably connected with the bottom of the pull plate 64, the top of the water outlet pipe 71 is fixedly connected with a triangular positioning plate 73, the inclined side of the positioning plate 73 is opposite to the pull plate 64, the center of the bottom of the water outlet pipe 71 is connected with a water inlet pipe 74, one end, far away from the water outlet pipe 71, of the water inlet pipe 74 is connected with a water tank 75, the water tank 75 is fixedly connected with the body part of the excavator body 1, a water pump 76 is installed in the water tank 75, the plurality of the nozzles 72 are symmetrical about the center of the water outlet pipe 71, and the free ends of the nozzles 72 are inclined towards the end close to the water outlet pipe 71;

when the fixed box 2 is connected with the small arm of the excavator body 1 through the L-shaped plate 3 and the pressure plate 4, the hydraulic oil pipe 62 is connected with a hydraulic system of the excavator body 1; when the excavator body 1 performs excavating operation, the hydraulic rod 60 and the spring 69 are both in a contraction state, and because the sum of the length of the pull plate 64 and the half length of the water outlet pipe 71 is greater than the maximum movement distance of the first slide block 61, one end of the pull plate 64 connected with the water outlet pipe 71 can deflect a certain angle towards the direction of the gear 11, and the water outlet pipe 71 can be kept approximately parallel to the small arm part of the excavator body 1 and is collected at the bottom of the fixed box 2, so that the water outlet pipe 71 can not influence the excavator bucket when the excavator body 1 performs excavating operation;

when the excavator body 1 is loaded with soil or stone, the hydraulic rod 60 is started to gradually push the first sliding block 61 to move, meanwhile, the second sliding block 65 moves along the limiting hole 66 under the pushing action of the spring 69 on the limiting block 67, in the process, the water outlet pipe 71 can keep an initial state to gradually approach the excavator bucket along the direction of the limiting hole 66, when the second limiting block 67 moves to the maximum displacement position, along with the continuous extension of the hydraulic rod 60, at the moment, the connecting end of the water outlet pipe 71 and the pull plate 64 can deflect in the direction that the middle of the water outlet pipe 71 is axially close to the excavator bucket under the pushing action of the pull plate 64, along with the further extension of the hydraulic rod 60, when the first sliding block 61 reaches the maximum displacement position, the pull plate 64 is just attached to the inclined surface of the positioning plate 73, at the moment, the water outlet pipe 71 is vertical to the small arm of the excavator body 1, the nozzle 72 part of the water outlet pipe 71 can be opposite to the bottom opening of the excavator bucket, when the soil and the stone are loaded from the excavator bucket, the water in the water tank 75 passes through the small arm 74, and finally sprays dust and the dust in the bottom opening of the excavator body 72, so that dust and the excavator bucket is reduced, and the dust is sprayed out of the excavator body 1, and the dust is sprayed.

As shown in fig. 3, 6 and 7, an arc-shaped protection plate 8 is arranged on one side of the water outlet pipe 71 close to the bucket, two ends of the arc-shaped protection plate 8 are vertically and fixedly connected with baffle plates 9, the two baffle plates 9 are respectively located at two ends of the water outlet pipe 71, a fixing shaft 10 penetrates through and is inserted into the baffle plates 9, one end of the fixing shaft 10 close to the water outlet pipe 71 is rotatably connected with the circle center of the water outlet pipe 71, a gear 11 is fixedly sleeved at the free end of the fixing shaft 10 close to the pulling plate 64, teeth 12 are annularly arranged at the bottom of the pulling plate 64 at the top of the gear 11 corresponding to the position, the teeth 12 are meshed with the gear 11, a movable plate 13 matched with the arc-shaped protection plate 8 is slidably inserted into the top of the arc-shaped protection plate 8, a top plate 14 matched with the movable plate 13 in length is vertically and fixedly connected with the top of the movable plate 13, a bottom of the arc-shaped protection plate 8 is provided with a bottom plate 15 matched with the arc-shaped protection plate in length, the bottom of the arc-shaped protection plate 8, the bottom of the arc-shaped protection plate 15 is fixedly connected with the water outlet pipe 71, the bottom of the nozzle 72, a groove is provided at the top of the bottom plate 15, the arc-shaped protection plate 15, the bottom of the arc-shaped protection plate 8, the arc-shaped protection plate is provided with the nozzle, the groove, and the arc-shaped protection plate, magnetic stripe 16, and the magnetic stripe 16 are provided with the magnetic pole opposite magnetic stripe 16 of the two magnetic poles of the arc-shaped protection plate 16 are provided;

when the water outlet pipe 71 is collected at the bottom of the forearm of the excavator body 1, the upper half part of the movable plate 13 is positioned outside the arc-shaped protection plate 8, the top plate 14 and the bottom plate 15 are respectively positioned at the top and the bottom of the nozzle 72, and the magnetic stripe 16 at the bottom of the arc-shaped protection plate 8 and the magnetic stripe 16 on the bottom plate 15 can be adsorbed together, so that the nozzle 72 can be protected under the combined action of the top plate 14, the bottom plate 15, the baffle 9, the arc-shaped protection plate 8 and the movable plate 13, and further, the nozzle 72 is prevented from being blocked by mud or dust in the excavating process or when the excavator is not used;

when spraying dust suppression is needed, along with the gradual extension of the hydraulic rod 60 and the spring 69, when the second slider 65 moves to the maximum displacement position, along with the further extension of the hydraulic rod 60, at this time, one end, connected with the water outlet pipe 71, of the pulling plate 64 can gradually rotate towards the direction of the gear 11, in the process, the teeth 12 at the bottom of the pulling plate 64 can drive the fixing shaft 10 to rotate through the gear 11, so that the arc-shaped protection plate 8 can gradually deflect upwards by taking the fixing shaft 10 as the screwing fixing shaft 10, at this time, the movable plate 13 can gradually retract into the arc-shaped protection plate 8, when the pulling plate 64 is in contact with the positioning plate 73, the hydraulic rod 60 stops extending, and at this time, the arc-shaped protection plate 8 can also be staggered with the nozzle 72 of the water outlet pipe 71 and located at the top of the nozzle 72, and further, the nozzle 72 cannot be affected.

Although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides an engineering machine tool vehicle dust keeper, includes excavator body (1), its characterized in that: the bottom of the forearm of excavator body (1) is equipped with fixed box (2), and the bottom of fixed box (2) is the open design, two L shaped plates (3) of the equal symmetry fixedly connected with of side around fixed box (2), run through on L shaped plate (3) and seted up the fixed orifices, and run through in the fixed orifices of two relative L shaped plates (3) and peg graft and have same clamp plate (4), the top screw thread of clamp plate (4) runs through and pegs graft and has fixed screw (5), the inside of fixed box (2) is equipped with transmission (6), the bottom of fixed box (2) is equipped with water jet equipment (7), and water jet equipment (7) are close to with the position of digging bucket of excavator body (1).

2. The construction machinery vehicle dustproof device according to claim 1, characterized in that: the transmission device (6) comprises a hydraulic rod (60), the hydraulic rod (60) penetrates through and is inserted into one side, away from the water spraying device (7), of the fixing box (2), a first sliding block (61) is fixedly connected to one end, located in the fixing box (2), of the hydraulic rod (60), one end, located outside the fixing box (2), of the hydraulic rod is connected with a hydraulic oil pipe (62), the hydraulic oil pipe (62) is connected with a hydraulic system of the excavator body (1), a stop block (63) is arranged on one side, away from the hydraulic rod (60), of the first sliding block (61), the stop block (63) is fixedly connected with the inner wall of the fixing box (2), a pull plate (64) is rotatably connected to the bottom of the first sliding block (61), the pull plate (64) is parallel to the bottom of the stop block (63), a second sliding block (65) is arranged on one side, away from the first sliding block (61), the second sliding block (65) is slidably mounted in the fixing box (2), the positions, opposite to the front side and the rear side of the fixing box (2) and to the second sliding block (65), a limiting hole (67) penetrates through a limiting block (66), and one end, of the second sliding block (67) is connected with a limiting block (67), the limiting block (67) is located the outside part of fixed box (2) and slides in the direction of being on a parallel with fixed box (2) and runs through and peg graft and have gag lever post (68), the equal fixedly connected with fixed block in both ends of gag lever post (68), and fixed block and fixed box (2) fixed connection, spring (69) has been cup jointed on gag lever post (68), and spring (69) are located one side that stopper (67) are close to hydraulic stem (60).

3. The construction machinery vehicle dustproof device according to claim 2, characterized in that: water jet equipment (7) include outlet pipe (71), the length of outlet pipe (71) and the width phase-match of bucket, the top center department of outlet pipe (71) rotates with the bottom of second slider (65) to be connected, one side that outlet pipe (71) are close to the bucket is connected with a plurality of nozzles (72), the part that outlet pipe (71) top is close to its one end rotates with the bottom of arm-tie (64) to be connected, the top fixedly connected with triangle-shaped locating plate (73) of outlet pipe (71), one side that locating plate (73) slope is relative with arm-tie (64), the bottom center department of outlet pipe (71) is connected with inlet tube (74), the one end that outlet pipe (71) were kept away from in inlet tube (74) is connected with water tank (75), the fuselage part fixed connection of water tank (75) and excavator body (1), and install water pump (76) in water tank (75).

4. The construction machine vehicle dust prevention device according to claim 3, characterized in that: one side that outlet pipe (71) is close to the bucket is equipped with arc guard plate (8), equal perpendicular fixedly connected with baffle (9) in both ends of arc guard plate (8), and two baffles (9) are located the position at outlet pipe (71) both ends respectively, it has fixed axle (10) to run through the grafting on baffle (9), the one end that fixed axle (10) are close to outlet pipe (71) is connected with the centre of a circle department rotation of outlet pipe (71) and is connect, wherein be close to with arm-tie (64) the free end of fixed axle (10) is fixed to be cup jointed gear (11), and gear (11) top corresponds the position arm-tie (64) bottom annular is provided with tooth (12), and tooth (12) and gear (11) meshing.

5. The construction machine vehicle dust prevention device according to claim 4, characterized in that: the top of arc guard plate (8) slides to peg graft there is rather than length assorted fly leaf (13), the perpendicular fixedly connected with in top of fly leaf (13) has length assorted roof (14) with it, the bottom of arc guard plate (8) is equipped with length assorted bottom plate (15) with it, bottom plate (15) and outlet pipe (71) fixed connection, and bottom plate (15) are located the bottom of nozzle (72), the recess has been seted up at bottom plate (15) top, and the recess is parallel with outlet pipe (71), magnetic stripe (16) are all installed to the bottom in the recess and arc guard plate (8), and two magnetic poles that magnetic stripe (16) are relative are opposite magnetic pole.

6. The construction machine vehicle dust prevention device according to claim 1, characterized in that: two clamping grooves (17) are formed in the direction, parallel to the front side of the pressing plate (4), of the top of the pressing plate (4), two sides of each clamping groove (17) are communicated with two sides of the pressing plate (4) respectively, the two clamping grooves (17) are opposite to the two L-shaped plates (3) respectively, and the width of each clamping groove (17) is the same as the thickness of each L-shaped plate (3).

7. The construction machine vehicle dust prevention device according to claim 3, characterized in that: the bottom of the pulling plate (64) is rotatably connected with a fixed sleeve (18), the fixed sleeve (18) is opposite to the position of the first sliding block (61), and the water inlet pipe (74) is inserted in the fixed sleeve (18) in a sliding manner.

8. The construction machine vehicle dust prevention device according to claim 5, characterized in that: the plurality of nozzles (72) are symmetrical about the centre of the outlet pipe (71), and the free ends of the nozzles (72) are inclined towards the end adjacent the outlet pipe (71).

9. The construction machine vehicle dust prevention device according to claim 8, characterized in that: the sum of the length of the pull plate (64) and the half length of the water outlet pipe (71) is larger than the maximum movement distance of the first sliding block (61), and the maximum movement distance of the second sliding block (65) is equal to the half length of the water outlet pipe (71).