Air dustproof device for constructional engineering

Abstract

The utility model discloses an air dust-proof device for constructional engineering, which belongs to the technical field of constructional engineering and comprises a main body. The outer surface of the spraying barrel is movably connected to the upper part of the main body; the nozzle penetrates through the interior of the spraying barrel; the outer surface of the ejection device is connected to the inner surface of the nozzle in a sliding mode, and the ejection device comprises a sliding block and an ejection rod; the outer surface of the sliding block is connected to the inner surface of the nozzle in a sliding mode; the connecting assembly is fixedly connected to the rear end of the sliding block; the output assembly is arranged on the upper surface of the main body; the ejection device is arranged, the connecting assembly pushes the sliding block, impurities in the nozzle are pushed out, and the problems that after an existing dustproof device is used for a long time, the device cannot be cleaned for a long time, the nozzle is blocked by the impurities, the water yield of the nozzle is greatly reduced, and even water cannot flow out are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of construction engineering, and in particular relates to an air dust prevention device for construction engineering. Background Art

[0002] Construction projects refer to the planning, investigation, design, construction, completion and other technical work and completed engineering entities for the construction, reconstruction or expansion of buildings and ancillary structures and facilities, as well as the installation of supporting lines, pipelines and equipment. Construction projects will generate a lot of dust during the construction process. These dusts will not only affect the air quality, but also pollute the surrounding environment. Air dust prevention devices can reduce dust emissions through adsorption, sedimentation and other methods, thereby protecting the environment. Construction workers in construction projects are exposed to dust environments for a long time, which is prone to various respiratory diseases such as pneumoconiosis. Air dust prevention devices can effectively reduce dust concentration, improve the working environment and protect the health of personnel.

[0003] To solve the above problems, a device has appeared on the market, which can atomize the dust in the air into water through a high-pressure pump and an atomizing nozzle, and then push the water mist out through a strong wind fan to achieve functions such as dust prevention, cooling, and disinfection. However, after long-term use, if the device is not cleaned for a long time, the nozzle will be clogged with impurities, the water output of the nozzle will be greatly reduced or even no water will come out, which greatly reduces work efficiency. Utility Model Content

[0004] In view of the problems existing in the prior art, the utility model provides an air dust prevention device for construction projects, which has the advantage of unblocking the nozzle when the nozzle is blocked by impurities when the dust prevention device is used. This solves the problem that the existing dust prevention device is not cleaned for a long time after long-term use, resulting in the nozzle being blocked by impurities, and the water output of the nozzle is greatly reduced or even no water comes out.

[0005] The utility model is implemented as follows: an air dust prevention device for construction engineering, comprising:

[0006] main body;

[0007] Spray barrel: the outer surface of the spray barrel is movably connected to the upper part of the main body;

[0008] Nozzle: the nozzle runs through the inside of the spray barrel;

[0009] Ejector: The outer surface of the ejector is slidably connected to the inner surface of the nozzle, comprising:

[0010] Sliding blocks: a plurality of sliding blocks are provided, and the outer surfaces of the plurality of sliding blocks are slidably connected to the inner surface of the nozzle;

[0011] First connecting component: the first connecting component is fixedly connected to the rear end of the sliding block;

[0012] Output component: The output component is arranged on the upper surface of the main body.

[0013] As a preferred embodiment of the present invention, the first connecting component includes:

[0014] First connecting column: a plurality of first connecting columns are provided, and front ends of the plurality of first connecting columns are fixedly connected to the sliding block;

[0015] Connecting ring: The outer surface of the connecting ring is fixedly connected to the rear end of the first connecting column.

[0016] As a preferred embodiment of the present invention, a fixing rod is provided on the inner surface of the connecting ring, and two fixing rods are provided. Both fixing rods are fixedly connected to the inner surface of the connecting ring, and the fixing rods intersect crosswise.

[0017] As a preferred embodiment of the present invention, a second connecting assembly is provided at the center of the fixing rod, comprising:

[0018] Second connecting column: The bottom of the second connecting column is fixedly connected to the center of the fixing rod, a rectangular groove is provided at the front of the second connecting column, a third connecting column is provided on the outer surface of the second connecting column, the second connecting column passes through the third connecting column, and the outer surface of the second connecting column is rotatably connected to the inner surface of the third connecting column;

[0019] First connecting rod: two first connecting rods are provided, and the bottom ends of the two first connecting rods are fixedly connected to the inner surface of the rectangular groove;

[0020] Second connecting rod: two second connecting rods are provided, and the lower surfaces of the front ends of the two second connecting rods are both rotatably connected to the upper surface of the rear end of the first connecting rod;

[0021] Third connecting rod: two third connecting rods are provided, and the lower surfaces of the front ends of the two third connecting rods are both rotatably connected to the lower surface of the rear end of the second connecting rod;

[0022] Fourth connecting rod: two fourth connecting rods are provided, and the upper surfaces of the front ends of the two fourth connecting rods are both rotatably connected to the lower surface of the rear end of the second connecting rod;

[0023] Fifth connecting rod: two fifth connecting rods are provided, and the upper surfaces of the front ends of the two fifth connecting rods are both rotatably connected to the lower surface of the rear end of the fourth connecting rod;

[0024] Sixth connecting rod: two sixth connecting rods are provided, and both of the six connecting rods are provided on the outer surface of the second connecting column;

[0025] Seventh connecting rod: two seventh connecting rods are provided, and the upper surfaces of the rear ends of the two seventh connecting rods are both rotatably connected to the lower surface of the front end of the fifth connecting rod.

[0026] As a preferred embodiment of the present invention, a gear set is provided on the upper surface of the rear end of the third connecting rod, including:

[0027] Fourth connecting column: two fourth connecting columns are provided, and the bottoms of the two fourth connecting columns are fixedly connected to the upper surface of the rear end of the third connecting rod;

[0028] Gear: There are two gears, and the lower surfaces of the two gears are fixedly connected to the upper surface of the third connecting column;

[0029] Fixed column: two fixed columns are provided, and the inner surfaces of the two fixed columns are rotatably connected to the outer surface of the third connecting column;

[0030] "L"-shaped connecting rod: Two "L"-shaped connecting rods are provided, one end of each of the two "L"-shaped connecting rods is fixedly connected to the outer surface of the fixing column, and the other end of the "L"-shaped connecting rod is fixedly connected to the upper surface of the main body.

[0031] As a preferred embodiment of the present invention, the outer surface of the nozzle is provided with a fixing assembly, including:

[0032] Fixed ring: the inner ring of the fixed ring is fixedly connected to the outer surface of the nozzle;

[0033] Sliding rod: The front end of the sliding rod is fixedly connected to the outer surface of the fixing ring, and the rear end of the sliding rod is fixedly connected to the connecting ring.

[0034] As a preferred embodiment of the present invention, an output assembly is provided on the upper surface of the main body, including:

[0035] Motor: The bottom of the motor is fixedly connected to the upper surface of the main body;

[0036] Output rod: There are two output rods, the upper surfaces of the two output rods are fixedly connected to the lower surface of the front end of the seventh connecting rod, and the bottom of the output rod is rotatably connected to the output end of the motor.

[0037] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0038] 1. The utility model is provided with an ejection device. When the air dust is not cleaned for a long time, the staff will start the motor in the output assembly. The motor provides power for the output rod, indirectly drives the connecting ring in the first connecting assembly, so that the connecting ring reciprocates back and forth, the connecting ring drives the first connecting column, so that the first connecting column moves with the movement of the connecting ring, and the first connecting rod drives the sliding block to move back and forth, so as to achieve the effect of pushing out the impurities inside the nozzle from the nozzle mouth after long-term use, when the device is not cleaned for a long time, the nozzle is blocked by impurities, the water output of the nozzle is greatly reduced or even no water can be output.

[0039] 2. The utility model sets a second connecting assembly and a gear set. Under the action of the output rod, the seventh connecting rod starts to rotate, the seventh connecting rod drives the fifth connecting rod to rotate, and the fifth connecting rod drives the fourth connecting rod to rotate. Since the fourth connecting rod is connected to the second connecting rod, the second connecting rod starts to rotate, the second connecting rod drives the third connecting rod, and the third connecting rod is connected to the fourth connecting column, so that the fourth connecting column starts to rotate. The third connecting column is connected to the gear, so that the gear starts to rotate. The gears are engaged with each other, driving the second connecting assembly on the other side. Since the fifth connecting rod is connected to the sixth connecting rod, the sixth connecting rod is fixedly connected to the third connecting column. Under the interaction of the sixth connecting rod and the fifth connecting rod, the third connecting rod moves along the outer surface of the second connecting column. The second connecting rod drives the first connecting rod to rotate, so that the ejection device can move inside the nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of a three-dimensional structure provided by an embodiment of the utility model;

[0041] Figure 2 yes Figure 1 A local enlarged schematic diagram of the middle A;

[0042] Figure 3 It is a full cross-sectional schematic diagram provided by an embodiment of the utility model;

[0043] Figure 4 yes Figure 3 A partial enlarged schematic diagram of point B in the middle;

[0044] Figure 5 yes Figure 2 Explosion diagram.

[0045] In the figure: 1. main body; 2. spray gun; 3. nozzle; 4. ejection device; 410. sliding block; 420. first connecting assembly; 421. first connecting column; 422. connecting ring; 430. output assembly; 431. motor; 432. output rod; 5. fixed rod; 6. second connecting assembly; 601. second connecting column; 602. rectangular groove; 603. third connecting column; 604. first connecting rod; 605. second connecting rod; 606. third connecting rod; 607. fourth connecting rod; 608. fifth connecting rod; 609. sixth connecting rod; 610. seventh connecting rod; 7. gear set; 701. fourth connecting column; 702. gear; 703. fixed column; 704. "L" shaped connecting rod; 8. fixed assembly; 801. fixed ring; 802. sliding rod. DETAILED DESCRIPTION

[0046] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0047] The structure of the utility model is described in detail below in conjunction with the accompanying drawings.

[0048] like Figures 1 to 5 As shown, an air dust prevention device for construction engineering provided by an embodiment of the utility model comprises:

[0049] Subject 1;

[0050] Spray tube 2: The outer surface of spray tube 2 is movably connected to the upper part of main body 1;

[0051] Nozzle 3: Nozzle 3 penetrates inside the spray barrel 2;

[0052] Ejector 4: The outer surface of the ejector 4 is slidably connected to the inner surface of the nozzle 3, and includes:

[0053] Sliding blocks 410: A plurality of sliding blocks 410 are provided, and the outer surfaces of the plurality of sliding blocks 410 are slidably connected to the inner surface of the nozzle 3;

[0054] First connecting component 420: The first connecting component 420 is fixedly connected to the rear end of the sliding block 410;

[0055] Output component 430 : The output component 430 is disposed on the upper surface of the main body 1 .

[0056] refer to Figure 1 , Figure 3 and Figure 4 As shown, the first connection component 420 includes:

[0057] First connecting pillars 421: a plurality of first connecting pillars 421 are provided, and front ends of the plurality of first connecting pillars 421 are fixedly connected to the sliding block 410;

[0058] Connecting ring 422 : The outer surface of the connecting ring 422 is fixedly connected to the rear end of the first connecting column 421 .

[0059] By adopting the above scheme: since the connecting ring 422 is fixedly connected to the first connecting column 421, the connecting ring 422 can drive the first connecting ring 422 to move forward and backward, and the first connecting rod 604 can drive the sliding block 410 to slide inside the nozzle 3, so that impurities inside the nozzle 3 can be pushed out from the nozzle 3 outlet.

[0060] refer to Figure 1 and Figure 2 As shown, a fixing rod 5 is provided on the inner surface of the connecting ring 422 , and two fixing rods 5 are provided. The two fixing rods 5 are both fixedly connected to the inner surface of the connecting ring 422 , and the fixing rods 5 intersect crosswise.

[0061] With the above solution, the fixing rod 5 mainly serves to stabilize the connecting ring 422 .

[0062] refer to Figure 1 and Figure 5 As shown, a second connecting assembly 6 is provided at the center of the fixing rod 5, comprising:

[0063] Second connecting column 601: The bottom of the second connecting column 601 is fixedly connected to the center of the fixing rod 5, a rectangular groove 602 is opened at the front of the second connecting column 601, and a third connecting column 603 is arranged on the outer surface of the second connecting column 601. The second connecting column 601 passes through the third connecting column 603, and the outer surface of the second connecting column 601 is rotatably connected to the inner surface of the third connecting column 603;

[0064] First connecting rod 604: Two first connecting rods 604 are provided, and the bottom ends of the two first connecting rods 604 are fixedly connected to the inner surface of the rectangular groove 602;

[0065] Second connecting rod 605: Two second connecting rods 605 are provided, and the lower surfaces of the front ends of the two second connecting rods 605 are both rotatably connected to the upper surface of the rear end of the first connecting rod 604;

[0066] Third connecting rod 606: Two third connecting rods 606 are provided, and the lower surfaces of the front ends of the two third connecting rods 606 are both rotatably connected to the lower surface of the rear end of the second connecting rod 605;

[0067] Fourth connecting rod 607: Two fourth connecting rods 607 are provided, and the upper surfaces of the front ends of the two fourth connecting rods 607 are both rotatably connected to the lower surface of the rear end of the second connecting rod 605;

[0068] Fifth connecting rod 608: Two fifth connecting rods 608 are provided, and the upper surfaces of the front ends of the two fifth connecting rods 608 are both rotatably connected to the lower surface of the rear end of the fourth connecting rod 607;

[0069] Sixth connecting rod 609: Two sixth connecting rods 609 are provided, and the two sixth connecting rods 609 are both provided on the outer surface of the second connecting column 601;

[0070] Seventh connecting rod 610 : Two seventh connecting rods 610 are provided, and the upper surfaces of the rear ends of the two seventh connecting rods 610 are both rotatably connected to the lower surface of the front end of the fifth connecting rod 608 .

[0071] The above scheme is adopted: the seventh connecting rod 610 rotates, the seventh connecting rod 610 drives the fifth connecting rod 608 to rotate, the fifth connecting rod 608 drives the fourth connecting rod 607 to rotate, and since the fourth connecting rod 607 is connected to the second connecting rod 605, the second connecting rod 605 starts to rotate, the second connecting rod 605 drives the third connecting rod 606 to rotate, the second connecting rod 605 is rotatably connected to the first connecting rod 604, and the second connecting rod 605 rotates at one end of the first connecting rod 604. Since the fifth connecting rod 608 is connected to the sixth connecting rod 609, the sixth connecting rod 609 is fixedly connected to the third connecting column 603. Under the interaction between the sixth connecting rod 609 and the fifth connecting rod 608, the third connecting column 603 moves along the outer surface of the second connecting column 601, and the second connecting rod 605 drives the first connecting rod 604 to rotate, so that the second connecting column 601 reciprocates back and forth along the inner surface of the third connecting column 603.

[0072] refer to Figure 1 and Figure 5 As shown, a gear set 7 is provided on the upper surface of the rear end of the third connecting rod 606, including:

[0073] Fourth connecting column 701: Two third connecting columns 603 are provided, and the bottoms of the two fourth connecting columns 701 are fixedly connected to the upper surface of the rear end of the third connecting rod 606;

[0074] Gear 702: Two gears 702 are provided, and the lower surfaces of the two gears 702 are fixedly connected to the upper surface of the third connecting column 603;

[0075] Fixed column 703: Two fixed columns 703 are provided, and the inner surfaces of the two fixed columns 703 are both rotatably connected to the outer surface of the third connecting column 603;

[0076] “L”-shaped connecting rod 704 : Two “L”-shaped connecting rods 704 are provided, one end of each of the two “L”-shaped connecting rods 704 is fixedly connected to the outer surface of the fixing column 703 , and the other end of the “L”-shaped connecting rod 704 is fixedly connected to the upper surface of the main body 1 .

[0077] The above scheme is adopted: since the fourth connecting column 701 is fixedly connected to the third connecting rod 606, the third connecting rod 606 rotates, driving the fourth connecting column 701 to start rotating, and the fourth connecting column 701 drives the gear 702, causing the gear 702 to start rotating, and the gears 702 engage with each other to drive the connecting rod on the other side. The fixed column 703 mainly serves to prevent the fourth connecting column 701 from deviating when the fourth connecting column 701 rotates, and the "L"-shaped connecting rod 704 mainly serves to stabilize the fixed column 703.

[0078] refer to Figure 4 As shown, the outer surface of the nozzle 3 is provided with a fixing assembly 8, including:

[0079] Fixed ring 801: The inner ring of the fixed ring 801 is fixedly connected to the outer surface of the nozzle 3;

[0080] Sliding rod 802 : The front end of the sliding rod 802 is fixedly connected to the outer surface of the fixing ring 801 , and the rear end of the sliding rod 802 is fixedly connected to the connecting ring 422 .

[0081] The above solution is adopted: the sliding rod 802 mainly connects the fixing ring 801 with the connecting ring 422. The movement of the connecting ring 422 can drive the fixing ring 801 to move. Since the fixing ring 801 is fixedly connected to the outer surface of the nozzle 3, the fixing ring 801 moves forward, so that the nozzle 3 is separated from the nozzle 3, making it easier for the sliding block 410 to push out impurities.

[0082] refer to Figure 1 and Figure 5 As shown, the upper surface of the main body 1 is provided with an output assembly 430, including:

[0083] Motor 431: The bottom of the motor 431 is fixedly connected to the upper surface of the main body 1;

[0084] Output rod 432: Two output rods 432 are provided, and the upper surfaces of the two output rods 432 are fixedly connected to the lower surface of the front end of the seventh connecting rod 610, and the bottom of the output rod 432 is rotatably connected to the output end of the motor 431.

[0085] The above solution is adopted: the motor 431 is started, the motor 431 drives the output rod 432 to make the output rod 432 start to rotate, and the output rod 432 drives the seventh connecting rod 610 to make the seventh connecting rod 610 start to rotate.

[0086] The working principle of this utility model:

[0087] When in use, the motor 431 is started, and the motor 431 drives the output rod 432 to rotate, and the output rod 432 starts to rotate, and the output rod 432 drives the seventh connecting rod 610 to make the seventh connecting rod 610 start to rotate, and the seventh connecting rod 610 drives the fifth connecting rod 608 to rotate, and the fifth connecting rod 608 drives the fourth connecting rod 607 to rotate. Since the fourth connecting rod 607 is connected to the second connecting rod 605, the second connecting rod 605 starts to rotate, and the second connecting rod 605 drives the third connecting rod 606, and the third connecting rod 606 is connected to the fourth connecting column 701, so that the fourth connecting column 701 starts to rotate, and the third connecting column 603 is connected to the gear 702, so that the gear 702 starts to rotate, and the gears 702 are meshed with each other, driving the second connecting rod on the other side. Connecting assembly 6, since the fifth connecting rod 608 is connected to the sixth connecting rod 609, the sixth connecting rod 609 is fixedly connected to the third connecting column 603, the third connecting column 603 moves along the outer surface of the second connecting column 601 under the interaction between the sixth connecting rod 609 and the fifth connecting rod 608, the second connecting rod 605 drives the first connecting rod 604 to rotate, so that the second connecting assembly 6 starts to move back and forth, the second connecting assembly 6 drives the fixed rod 5, the fixed rod 5 is fixedly connected to the connecting ring 422, and the second connecting rod 605 indirectly drives the ejection device 4 to move back and forth, so as to achieve the effect of pushing out the impurities inside the nozzle from the nozzle mouth after long-term use, when the device is not cleaned for a long time, the nozzle is blocked by impurities, the water output of the nozzle is greatly reduced or even no water can be discharged.

[0088] To sum up: this air dust prevention device for construction projects, through the main body 1, spray barrel 2, nozzle 3, ejection device 4, fixing rod 5, second connecting component 6, gear 702 group 7 and fixing component 8, solves the problem of existing dust prevention devices. After long-term use, the device is not cleaned for a long time, resulting in the nozzle being blocked by impurities, the water output of the nozzle is greatly reduced or even no water comes out.

[0089] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0090] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air dust prevention device for construction engineering, characterized in that: include: Subject (1); Spray barrel (2): the outer surface of the spray barrel (2) is movably connected to the upper part of the main body (1); Nozzle (3): the nozzle (3) penetrates the interior of the spray barrel (2); Ejection device (4): the outer surface of the ejection device (4) is slidably connected to the inner surface of the nozzle (3), comprising: Sliding blocks (410): a plurality of sliding blocks (410) are provided, and the outer surfaces of the plurality of sliding blocks (410) are all slidably connected to the inner surface of the nozzle (3); First connecting component (420): the first connecting component (420) is fixedly connected to the rear end of the sliding block (410); Output component (430): the output component (430) is arranged on the upper surface of the main body (1).

2. The air dust prevention device for construction engineering as claimed in claim 1, characterized in that: The first connection component (420) comprises: First connecting pillars (421): a plurality of first connecting pillars (421) are provided, and front ends of the plurality of first connecting pillars (421) are fixedly connected to the sliding block (410); Connecting ring (422): the outer surface of the connecting ring (422) is fixedly connected to the rear end of the first connecting column (421).

3. The air dust prevention device for construction engineering as claimed in claim 2, characterized in that: The inner surface of the connecting ring (422) is provided with a fixing rod (5), and two fixing rods (5) are provided. The two fixing rods (5) are both fixedly connected to the inner surface of the connecting ring (422), and the fixing rods (5) intersect each other in a cross shape.

4. The air dust prevention device for construction engineering as claimed in claim 3, characterized in that: A second connecting assembly (6) is arranged at the center of the fixing rod (5), comprising: Second connecting column (601): The bottom of the second connecting column (601) is fixedly connected to the center of the fixing rod (5), a rectangular groove (602) is provided at the front of the second connecting column (601), a third connecting column (603) is provided on the outer surface of the second connecting column (601), the second connecting column (601) penetrates the third connecting column (603), and the outer surface of the second connecting column (601) is rotatably connected to the inner surface of the third connecting column (603); First connecting rod (604): two first connecting rods (604) are provided, and the bottom ends of the two first connecting rods (604) are fixedly connected to the inner surface of the rectangular groove (602); Second connecting rod (605): two second connecting rods (605) are provided, and the lower surfaces of the front ends of the two second connecting rods (605) are both rotatably connected to the upper surface of the rear end of the first connecting rod (604); Third connecting rod (606): two third connecting rods (606) are provided, and the lower surfaces of the front ends of the two third connecting rods (606) are both rotatably connected to the lower surface of the rear end of the second connecting rod (605); Fourth connecting rod (607): two fourth connecting rods (607) are provided, and the upper surfaces of the front ends of the two fourth connecting rods (607) are both rotatably connected to the lower surface of the rear end of the second connecting rod (605); Fifth connecting rod (608): two fifth connecting rods (608) are provided, and the upper surfaces of the front ends of the two fifth connecting rods (608) are both rotatably connected to the lower surface of the rear end of the fourth connecting rod (607); Sixth connecting rod (609): two sixth connecting rods (609) are provided, and both of the six connecting rods (609) are provided on the outer surface of the second connecting column (601); Seventh connecting rod (610): Two seventh connecting rods (610) are provided, and the upper surfaces of the rear ends of the two seventh connecting rods (610) are both rotatably connected to the lower surface of the front end of the fifth connecting rod (608).

5. The air dust prevention device for construction engineering as claimed in claim 4, characterized in that: The rear end upper surface of the third connecting rod (606) is provided with a gear set (7), comprising: Fourth connecting column (701): two third connecting columns (603) are provided, and the bottoms of the two fourth connecting columns (701) are fixedly connected to the upper surface of the rear end of the third connecting rod (606); Gear (702): Two gears (702) are provided, and the lower surfaces of the two gears (702) are fixedly connected to the upper surface of the third connecting column (603); Fixed column (703): Two fixed columns (703) are provided, and the inner surfaces of the two fixed columns (703) are both rotatably connected to the outer surface of the third connecting column (603); "L"-shaped connecting rod (704): Two "L"-shaped connecting rods (704) are provided, one end of each of the two "L"-shaped connecting rods (704) is fixedly connected to the outer surface of the fixing column (703), and the other end of the "L"-shaped connecting rod (704) is fixedly connected to the upper surface of the main body (1).

6. The air dust prevention device for construction engineering as claimed in claim 2, characterized in that: The outer surface of the nozzle (3) is provided with a fixing assembly (8), comprising: Fixed ring (801): the inner ring of the fixed ring (801) is fixedly connected to the outer surface of the nozzle (3); Sliding rod (802): the front end of the sliding rod (802) is fixedly connected to the outer surface of the fixing ring (801), and the rear end of the sliding rod (802) is fixedly connected to the connecting ring (422).

7. The air dust prevention device for construction engineering as claimed in claim 4, characterized in that: An output assembly (430) is provided on the upper surface of the main body (1), comprising: Motor (431): the bottom of the motor (431) is fixedly connected to the upper surface of the main body (1); Output rod (432): Two output rods (432) are provided, and the upper surfaces of the two output rods (432) are fixedly connected to the lower surface of the front end of the seventh connecting rod (610), and the bottom of the output rod (432) is rotatably connected to the output end of the motor (431).

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