Dust falling mechanism and milling excavator

Abstract

The dust falling mechanism comprises a spraying assembly, a flexible water pipe and a water tank assembly, the water tank assembly is connected to a main machine body of the milling excavator, and the spraying assembly comprises a water conveying pipe connected to the rear upper portion of a milling and excavating head and a plurality of first spray heads and second spray heads connected to the periphery of the water conveying pipe. The first nozzles and the second nozzles are sequentially and alternately arranged at intervals in the axial direction of the water conveying pipe and face the front side of the milling excavator main body, the first nozzles incline towards the side away from the milling and excavating head, the second nozzles incline towards the axis side of the milling and excavating head, and the flexible water pipe is connected between the water tank assembly and the water conveying pipe. According to the dust falling mechanism provided by the utility model, the first spray head is used for spraying water to the milling and digging working face, and the second spray head is used for spraying water to the milling and digging head in work, so that the generation of flying dust in the milling and digging process is effectively reduced, the pollution of dust to the construction environment and the harm to the health of constructors are avoided, and the improvement of the construction efficiency is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of milling excavator equipment, and in particular relates to a dust reduction mechanism and a milling excavator. Background Art

[0002] Drum milling machines provide a new construction method for tunnel excavation. Due to their advantages such as not damaging soil structure and low noise, they are widely used in tunnel, ditch, municipal pipeline excavation, highway pavement crushing, mining, rock and frozen soil excavation and other construction fields.

[0003] During the construction process of the existing milling and drilling machines, due to the lack of corresponding dust removal devices, a large amount of dust will be raised on the working surface, making the working conditions very bad, which not only affects the surrounding environment, but also harms the health of the construction workers. Utility Model Content

[0004] The embodiment of the utility model provides a dust reduction mechanism, which can effectively reduce the generation of dust during the milling and excavation process, which not only avoids the pollution of the construction environment by dust and the harm to the health of construction workers, but also helps to improve the construction efficiency.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: in the first aspect, a dust reduction mechanism is provided, including a spray assembly, a flexible water pipe and a water tank assembly, the water tank assembly is connected to the main body of the milling machine, the spray assembly includes a water pipe connected to the upper rear of the milling head and a plurality of first nozzles and second nozzles connected to the outer periphery of the water pipe, the water pipe extends along the width direction of the main body of the milling machine, the first nozzle and the second nozzle are alternately arranged in sequence along the axial direction of the water pipe, and are both arranged toward the front side of the main body of the milling machine, the first nozzle is inclined to the side away from the milling head, and the second nozzle is inclined to the axial side of the milling head, and the flexible water pipe is connected between the water tank assembly and the water pipe.

[0006] As another embodiment of the utility model, the water pipe is connected to the milling head through two mounting brackets, and the two mounting brackets are arranged at intervals along the axial direction of the water pipe. The mounting brackets include a connecting rod connected to the milling head, a mounting seat connected to the upper end of the connecting rod, and an arc-shaped cover plate connected to the top of the mounting seat. The mounting seat is provided with a first arc-shaped groove, and the arc-shaped cover plate is provided with a second arc-shaped groove. The first arc-shaped groove and the second arc-shaped groove enclose a clamping hole for the water pipe to pass through.

[0007] As another embodiment of the utility model, the connecting rod comprises a lower screw connected to the milling head, an upper screw connected to the mounting seat, and an adjusting screw sleeve threadedly sleeved on the outer periphery of the lower screw and the upper screw.

[0008] As another embodiment of the utility model, the dust reduction mechanism also includes a clamping assembly for clamping and guiding the flexible water pipe, the clamping assembly includes a lower clamping seat connected to the working arm of the milling machine and an upper clamping seat connected to the upper part of the lower clamping seat, and a guide hole for the flexible water pipe to pass through is formed between the upper clamping seat and the lower clamping seat.

[0009] As another embodiment of the utility model, the clamping assembly further includes a support block supported below the lower clamping seat, the support block is connected to the side wall of the working arm, and a weight-reducing groove opening downward is provided on the support block.

[0010] As another embodiment of the utility model, a guide cylinder is sleeved in the guide hole. The guide cylinder includes a sleeve portion located in the guide hole and a flared portion respectively connected to both ends of the sleeve portion. The outer end diameter of the flared portion gradually increases.

[0011] As another embodiment of the utility model, the dust reduction mechanism further comprises a water baffle plate connected to the working arm, the water baffle plate is located outside and behind the spray assembly, and a through hole for the flexible water pipe to pass through is provided on the water baffle plate.

[0012] As another embodiment of the utility model, an auxiliary baffle is slidably connected to the outer side of the water baffle, a first long hole extending in the up-down direction is provided on the water baffle, a second long hole extending in the up-down direction is provided on the auxiliary baffle, and the water baffle and the auxiliary baffle are connected by fasteners that pass through the first long hole and the second long hole.

[0013] As another embodiment of the utility model, the water tank assembly includes a box body arranged on the main body of the milling machine and a water pump motor unit connected to the top of the box body, a flexible water pipe is connected to the water outlet of the water pump motor unit, and a protective cover is connected to the box body and arranged above the water pump motor unit.

[0014] The beneficial effect of the dust reduction mechanism provided by the utility model is that compared with the prior art, the dust reduction mechanism of the utility model supplies water to the spray assembly through a water tank assembly and a flexible water pipe, and the spray assembly utilizes a first nozzle arranged toward the front side of the main body of the milling machine to spray water toward the milling working surface, and simultaneously utilizes a second nozzle arranged obliquely toward the axial side of the milling head to spray water toward the working milling head, thereby effectively reducing the generation of dust during the milling process, which not only avoids the pollution of dust to the construction environment and the harm to the health of construction personnel, but also helps to improve construction efficiency.

[0015] In a second aspect, an embodiment of the utility model further provides a milling excavator, comprising the dust reduction mechanism proposed in any one of the aforementioned items.

[0016] The beneficial effects of the milling machine provided in this embodiment are the same as the beneficial effects of the aforementioned dust reduction mechanism, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 A schematic diagram of the front view of a milling machine provided with a dust reduction mechanism according to an embodiment of the utility model;

[0019] Figure 2 For the utility model embodiment Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0020] Figure 3 A schematic diagram of the top view of the structure of a milling machine provided with a dust reduction mechanism according to an embodiment of the utility model;

[0021] Figure 4 For the utility model embodiment Figure 3 The enlarged structural diagram of the middle B part;

[0022] Figure 5 A schematic diagram of the structure of a clamping assembly provided in an embodiment of the utility model;

[0023] Figure 6 A schematic diagram of the structure of the guide cylinder provided in the embodiment of the utility model;

[0024] Figure 7 A schematic diagram of the structure of the mounting bracket provided in the embodiment of the utility model;

[0025] Figure 8 A schematic diagram of the structure of a water baffle and an auxiliary baffle provided in an embodiment of the utility model;

[0026] Fig. 9 A schematic structural diagram of a dust reduction mechanism provided in an embodiment of the utility model.

[0027] Among them, the reference numerals in the figure are:

[0028] 1. Spray assembly; 11. Water pipe; 12. First nozzle; 13. Second nozzle; 2. Flexible water pipe; 3. Water tank assembly; 31. Box; 32. Water pump motor unit; 33. Protective cover; 4. Mounting bracket; 41. Connecting rod; 411. Lower screw; 412. Upper screw; 413. Adjusting screw sleeve; 42. Mounting seat; 421. First arc groove; 43. Arc cover plate; 431. Second arc groove; 5. Clamping assembly; 51. Lower clamping seat; 52. Upper clamping seat; 53. Support block; 531. Weight reduction groove; 54. Guide cylinder; 541. Socket joint; 542. Expanding portion; 6. Water baffle; 61. Through hole; 62. First long hole; 63. Fastener; 7. Auxiliary baffle; 71. Second long hole; 10. Main body; 20. Milling head; 30. Working arm. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on another element or indirectly on another element. It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "back", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meanings of "multiple" and "several" are two or more, unless otherwise clearly and specifically defined.

[0031] Please also read Figure 1 and Fig. 9The dust suppression mechanism provided by the utility model is now described. The dust suppression mechanism includes a spray assembly 1, a flexible water pipe 2 and a water tank assembly 3. The water tank assembly 3 is connected to the main body 10 of the milling machine. The spray assembly 1 includes a water pipe 11 connected to the upper rear of the milling head 20 and a plurality of first nozzles 12 and second nozzles 13 connected to the outer periphery of the water pipe 11. The water pipe 11 extends along the width direction of the main body 10 of the milling machine. The first nozzle 12 and the second nozzle 13 are alternately arranged in sequence along the axial direction of the water pipe 11 and are both arranged toward the front side of the main body 10 of the milling machine. The first nozzle 12 is inclined toward the side away from the milling head 20, and the second nozzle 13 is inclined toward the axial center side of the milling head 20. The flexible water pipe 2 is connected between the water tank assembly 3 and the water pipe 11.

[0032] Compared with the prior art, the dust reduction mechanism provided in the present embodiment supplies water to the spray assembly 1 through the water tank assembly 3 and the flexible water pipe 2. The spray assembly 1 utilizes the first nozzle 12 arranged toward the front side of the milling machine main body 10 to spray water toward the milling working surface, and simultaneously utilizes the second nozzle 13 inclined toward the axial side of the milling head 20 to spray water toward the working milling head 20, thereby effectively reducing the generation of dust during the milling process, which not only avoids the pollution of dust to the construction environment and the harm to the health of construction personnel, but also helps to improve construction efficiency.

[0033] In this embodiment, the first nozzle 12 and the second nozzle 13 adopt the structure of an atomizing nozzle. The water tank assembly 3 supplies water to the water pipe 11 through the flexible water pipe 2. The water in the water pipe 11 is sprayed by the first nozzle 12 and the second nozzle 13 to form water mist, which acts on the milling head 20 and the working surface near the milling head 20, and can effectively suppress the dust generated when the milling head 20 is working.

[0034] As a specific implementation of the dust reduction mechanism provided by the utility model, see Figure 4 and Figure 7 The water pipe 11 is connected to the milling head 20 through two mounting brackets 4. The two mounting brackets 4 are arranged at intervals along the axial direction of the water pipe 11. The mounting bracket 4 includes a connecting rod 41 connected to the milling head 20, a mounting seat 42 connected to the upper end of the connecting rod 41, and an arc-shaped cover plate 43 connected to the upper end of the mounting seat 42. The mounting seat 42 is provided with a first arc-shaped groove 421, and the arc-shaped cover plate 43 is provided with a second arc-shaped groove 431. The first arc-shaped groove 421 and the second arc-shaped groove 431 enclose a clamping hole for the water pipe 11 to pass through.

[0035] In this embodiment, the arc cover plate 43 and the mounting seat 42 are detachably connected by hexagonal bolts, which facilitates the subsequent disassembly and cleaning of the water pipe 11. Specifically, when installing the water pipe 11, the two ends of the water pipe 11 are first placed in the first arc grooves 421 of the two mounting seats 42, respectively, and then the two arc cover plates 43 are connected to the two mounting seats 42 one by one. After tightening the hexagonal bolts, the first arc groove 421 and the second arc groove 431 are tightly attached to the outer wall of the water pipe 11 to clamp the water pipe 11.

[0036] As a specific implementation of the dust reduction mechanism provided by the utility model, see Figure 7 The connecting rod 41 includes a lower screw rod 411 connected to the milling head 20 , an upper screw rod 412 connected to the mounting seat 42 , and an adjusting screw sleeve 413 threadedly sleeved on the outer periphery of the lower screw rod 411 and the upper screw rod 412 .

[0037] In this embodiment, the thread rotation directions of the lower screw rod 411 and the upper screw rod 412 are opposite, and the two ends of the adjusting screw sleeve 413 are respectively provided with threads that cooperate with the lower screw rod 411 and the upper screw rod 412. Rotating the adjusting screw sleeve 413 can make the upper screw rod 412 and the lower screw rod 411 approach each other or separate in the axial direction, thereby adjusting the length of the connecting rod 41.

[0038] Specifically, the lower end of the lower screw rod 411 is fixedly connected to the side of the milling head 20 by welding, and the upper end of the upper screw rod 412 is connected to the water pipe 11 through the mounting seat 42. The lower screw rod 411 is fixed by rotating the adjusting screw sleeve 413, and the adjusting screw sleeve 413 and the upper screw rod 412 slide axially relative to the lower screw rod 411. At the same time, the upper screw rod 412 slides axially relative to the adjusting screw sleeve 413 to adjust the length of the connecting rod 41, thereby adjusting the installation height of the water pipe 11, so that the installation height of the water pipe 11 can adapt to the milling construction of tunnels of different heights, and avoid the position interference between the water pipe 11 and the tunnel milling working surface.

[0039] As a specific implementation of the dust reduction mechanism provided by the utility model, see Figure 1 and Figure 5 The dust reduction mechanism also includes a clamping assembly 5 for clamping and guiding the flexible water pipe 2. The clamping assembly 5 includes a lower clamping seat 51 connected to the working arm 30 of the milling machine and an upper clamping seat 52 connected above the lower clamping seat 51. A guide hole for the flexible water pipe 2 to pass through is formed between the upper clamping seat 52 and the lower clamping seat 51.

[0040] It should be noted that when the milling machine is performing milling construction, the working arm 30 will drive the milling head 20 to swing up and down, and the spray assembly 1 is connected to the milling head 20, and its position will change with the swing of the milling head 20. One end of the flexible water pipe 2 is connected to the water tank assembly 3 and is fixed, while the other end is connected to the water pipe 11 of the spray assembly 1 and moves synchronously with the spray assembly 1.

[0041] In this embodiment, a clamping assembly 5 is provided to clamp and guide the flexible water pipe 2, so as to prevent the flexible water pipe 2 from being entangled and twisted during the movement of the spray assembly 1, thereby affecting the water supply function. Specifically, a plurality of clamping assemblies 5 can be provided, and are arranged at intervals on the side wall of the working arm 30. The flexible water pipe 2 sequentially passes through the guide holes on each clamping assembly 5, so that the flexible water pipe 2 can swing synchronously with the working arm 30, and at the same time, stretch and slide under the guidance of each guide hole, so as to prevent the flexible water pipe 2 from being scattered, entangled, and twisted.

[0042] Furthermore, the upper clamping seat 52 and the lower clamping seat 51 are connected by bolts to facilitate the clamping and installation of the flexible water pipe 2. It should be understood that the clamping of the flexible water pipe 2 by the upper clamping seat 52 and the lower clamping seat 51 mainly supports the flexible water pipe 2 to prevent the flexible water pipe 2 from being scattered, and the flexible water pipe 2 will be pulled and slid along the guide hole while the working arm 30 swings. Therefore, the upper clamping seat 52 and the lower clamping seat 51 cannot clamp the flexible water pipe 2 too tightly.

[0043] Furthermore, a plurality of guide holes may be provided on each clamping assembly 5 , which can not only comb out and guide the flexible water pipe 2 , but also comb out and guide other flexible pipelines on the milling machine, thereby improving the practicality of the clamping assembly 5 .

[0044] As a specific implementation of the dust reduction mechanism provided by the utility model, see Figure 5 The clamping assembly 5 also includes a support block 53 supported below the lower clamping seat 51. The support block 53 is connected to the side wall of the working arm 30. The support block 53 is provided with a weight-reducing groove 531 opening downward.

[0045] In this embodiment, the weight-reducing groove 531 is provided on the support block 53, which helps to reduce the weight of the equipment and save material consumption. Specifically, the support block 53 can adopt a steel structure of a channel steel to reduce production costs. The end wall of the support block 53 is welded and fixed to the side wall of the working arm 30, and the lower clamp seat 51 is provided on the top surface of the support block 53, which helps to improve the reliability of the connection between the clamping assembly 5 and the working arm 30.

[0046] As a specific implementation of the dust reduction mechanism provided by the utility model, see Figure 5 and Figure 6A guide cylinder 54 is sleeved in the guide hole. The guide cylinder 54 includes a sleeve portion 541 located in the guide hole and a flared portion 542 respectively connected to both ends of the sleeve portion 541. The outer end diameter of the flared portion 542 gradually increases.

[0047] In this embodiment, the guide tube 54 can be an integral structure, firstly the guide tube 54 is inserted into the outer periphery of the flexible water pipe 2, and then the guide tube 54 is clamped between the upper clamp seat 52 and the lower clamp seat 51; the guide tube 54 can also be a split structure symmetrical up and down, and is respectively arranged in the upper clamp seat 52 and the lower clamp seat 51. When the upper clamp seat 52 and the lower clamp seat 51 are connected, the guide tube 54 can be clamped on the outer periphery of the flexible water pipe 2. The guide tube 54 is made of elastic materials such as rubber to protect the flexible water pipe 2.

[0048] Furthermore, the sleeve portion 541 is sleeved on the outer periphery of the flexible water pipe 2 to prevent the upper clamping seat 52 and the lower clamping seat 51 from over-clamping the flexible water pipe 2; the setting of the flared portion 542 can, on the one hand, protect the flexible water pipe 2 from being scratched by the end wall of the guide hole when it is pulled out, and on the other hand, it can also prevent the guide tube 54 from slipping out of the guide hole, thereby improving the reliability of the clamping action of the clamping assembly 5.

[0049] As a specific implementation of the dust reduction mechanism provided by the utility model, see Figure 1 , Figure 2 and Figure 8 The dust reduction mechanism also includes a water baffle plate 6 connected to the working arm 30. The water baffle plate 6 is located outside and behind the spray assembly 1. The water baffle plate 6 is provided with a through hole 61 for the flexible water pipe 2 to pass through.

[0050] In this embodiment, the water baffle 6 can prevent the water columns sprayed by the first nozzle 12 and the second nozzle 13 from splashing backwards, and at the same time, the water columns splashed onto the water baffle 6 can be reflected by the water baffle 6 to form a finer water mist, which helps to improve the dust reduction efficiency. The water baffle 6 is provided with a through hole 61 for the flexible water pipe 2 to pass through, thereby preventing the flexible water pipe 2 from bending and affecting the water supply effect.

[0051] It should be noted that in the existing milling and drilling machines, the milling head 20 and the working arm 30 are connected by bolts. The bottom of the water baffle plate 6 in this embodiment is provided with through holes corresponding to the above-mentioned bolts. The water baffle plate 6 can be installed at the connection position between the milling head 20 and the working arm 30, thereby improving the installation convenience of the mechanism.

[0052] As a specific implementation of the dust reduction mechanism provided by the utility model, see Figure 8The outer side of the water baffle plate 6 is slidably connected with an auxiliary baffle plate 7, the water baffle plate 6 is provided with a first long hole 62 extending in the up-down direction, the auxiliary baffle plate 7 is provided with a second long hole 71 extending in the up-down direction, the water baffle plate 6 and the auxiliary baffle plate 7 are connected by a fastener 63 which is provided through the first long hole 62 and the second long hole 71.

[0053] In this embodiment, the auxiliary baffle plate 7 can be connected to the water baffle plate 6 through the cooperation of the first elongated hole 62, the second elongated hole 71 and the fastener 63, and the auxiliary baffle plate 7 can be moved up and down along the water baffle plate 6 to adjust the water-blocking height of the water baffle plate 6. The water-blocking height of the water baffle plate 6 is adjusted corresponding to the installation height of the water pipe 11 to avoid position interference with the milling and excavation working surface.

[0054] As a specific implementation of the dust reduction mechanism provided by the utility model, see Fig. 9 The water tank assembly 3 includes a box body 31 arranged on the main body 10 of the milling machine and a water pump motor unit 32 connected to the top of the box body 31. The flexible water pipe 2 is connected to the water outlet of the water pump motor unit 32. The box body 31 is connected to a protective cover 33 arranged above the water pump motor unit 32.

[0055] In this embodiment, the box 31 is a closed water tank, which is provided with auxiliary accessories such as a liquid level gauge, and water needs to be regularly supplied to the box 31 to ensure that there is sufficient water in the box 31. The protective cover 33 is a thin steel plate structure cover arranged above the water pump motor unit 32 to protect the water pump motor unit 32 from being polluted by dust or damaged by other debris.

[0056] Based on the same inventive concept, an embodiment of the present application also provides a milling excavator, comprising a dust reduction mechanism as proposed in any of the aforementioned items.

[0057] The beneficial effects of the milling machine provided in the embodiment are the same as the beneficial effects of the aforementioned dust reduction mechanism, which will not be repeated here.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Dust reduction mechanism, characterized in that: It includes a spray assembly, a flexible water pipe and a water tank assembly, the water tank assembly is connected to the main body of the milling machine, the spray assembly includes a water pipe connected to the upper rear of the milling head and a plurality of first and second nozzles connected to the outer periphery of the water pipe, the water pipe extends along the width direction of the main body of the milling machine, the first nozzle and the second nozzle are alternately arranged in sequence along the axial direction of the water pipe and are both arranged toward the front side of the main body of the milling machine, the first nozzle is inclined to the side away from the milling head, and the second nozzle is inclined to the axial side of the milling head, and the flexible water pipe is connected between the water tank assembly and the water pipe.

2. The dust suppression mechanism according to claim 1, characterized in that: The water pipe is connected to the milling head through two mounting brackets, and the two mounting brackets are arranged at intervals along the axial direction of the water pipe. The mounting bracket includes a connecting rod connected to the milling head, a mounting seat connected to the upper end of the connecting rod, and an arc-shaped cover plate connected to the top of the mounting seat. The mounting seat is provided with a first arc-shaped groove, and the arc-shaped cover plate is provided with a second arc-shaped groove. The first arc-shaped groove and the second arc-shaped groove enclose a clamping hole for the water pipe to pass through.

3. The dust suppression mechanism according to claim 2, characterized in that: The connecting rod comprises a lower screw connected to the milling head, an upper screw connected to the mounting seat, and an adjusting screw sleeve threadedly sleeved on the outer periphery of the lower screw and the upper screw.

4. The dust suppression mechanism according to claim 1, characterized in that: The dust reduction mechanism also includes a clamping assembly for clamping and guiding the flexible water pipe, the clamping assembly includes a lower clamping seat connected to the working arm of the milling machine and an upper clamping seat connected above the lower clamping seat, and a guide hole for the flexible water pipe to pass through is formed between the upper clamping seat and the lower clamping seat.

5. The dust suppression mechanism according to claim 4, characterized in that: The clamping assembly also includes a support block supported below the lower clamping seat, the support block is connected to the side wall of the working arm, and a weight-reducing groove opening downward is provided on the support block.

6. The dust suppression mechanism according to claim 4, characterized in that: A guide cylinder is sleeved in the guide hole. The guide cylinder comprises a sleeve portion located in the guide hole and flared portions respectively connected to two ends of the sleeve portion. The outer end diameter of the flared portion gradually increases.

7. The dust suppression mechanism according to claim 1, characterized in that: The dust suppression mechanism further comprises a water baffle plate connected to the working arm, the water baffle plate is located outside and behind the spray assembly, and a through hole for the flexible water pipe to pass through is provided on the water baffle plate.

8. The dust suppression mechanism according to claim 7, characterized in that: An auxiliary baffle is slidably connected to the outer side of the water baffle, a first long hole extending in the up-down direction is provided on the water baffle, a second long hole extending in the up-down direction is provided on the auxiliary baffle, and the water baffle and the auxiliary baffle are connected by fasteners penetrating the first long hole and the second long hole.

9. The dust suppression mechanism according to claim 1, characterized in that: The water tank assembly includes a box body arranged on the main body of the milling excavator and a water pump motor unit connected to the top of the box body, the flexible water pipe is connected to the water outlet of the water pump motor unit, and the box body is connected to a protective cover arranged above the water pump motor unit.

10. A milling machine, characterized in that: It comprises the dust reduction mechanism as described in any one of claims 1 to 9.

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