Dust falling device based on green house building construction and working method of dust falling device

Abstract

The invention relates to the technical field of construction dust falling devices, and discloses a dust falling device based on green house building construction and a working method thereof.The dust falling device comprises a direction changing mechanism, a guide plate, a rotator, a base table, a gun fog device and a spray head ring; the position, inserted into the blocking ring, of the blocking rod is manually adjusted, the blocking rod blocks the connecting plate, then the arc-shaped rotating range of the gun fog device supported by the supporting rod is adjusted, by adjusting the rotating angle, water mist is sprayed in a large range, the air humidity is reduced, the dust falling effect is achieved, and the rotating range can be adjusted according to requirements; and air blown by the fan blows a plastic plate to stretch a second spring, and the air is annularly blown out from three circulation grooves in three different directions, so that the water dispersion effect is improved, formed water mist is excessively dispersed and does not accumulate, the retention time of the water mist in the air is prolonged, the air humidifying effect is improved, and dust falling is conducted on the air.

Description

Technical Field

[0001] The invention relates to the technical field of construction dust reduction devices, and in particular to a dust reduction device based on green building construction and a working method thereof. Background Art

[0002] The green building construction dust reduction device mainly uses spraying water mist to settle the dust floating in the air to prevent the dust from floating indoors and being inhaled into the lungs of construction workers. It mainly uses fog cannons to humidify the air to achieve the effect of dust reduction. The existing fog cannons use fans to blow water forcefully, so that the water is blown into water mist to humidify the air. However, the fog cannons are in a fixed state, and the building construction site is too large. During the humidification and dust reduction process of the fog cannon, the water mist itself needs to float to the surrounding area for humidification. The spray range of the fog cannon is too small, which affects the humidification and dust reduction range of the construction site. The gas blown out by the fan blows the moisture, and the moisture is blown out inclined to the middle, while the gas blown out by the fan is blown straight and evenly, and the moisture is concentrated in the middle by the gas and blown out. The water mist converted by the moisture is too dense in the middle and easily condenses into water droplets and falls quickly, thereby reducing the length of time the water mist stays in the air and affecting the humidification effect. Summary of the invention

[0003] The present invention provides a dust suppression device based on green building construction and a working method thereof, which overcomes the shortcomings described in the background technology.

[0004] The technical solution adopted by the present invention to solve its technical problem is: A dust suppression device based on green house construction, comprising a direction-changing mechanism, a guide plate, a rotator, a base, a fog gun, and a nozzle ring. The direction-changing mechanism is vertically arranged on the lower surface of the fog gun, and supported and rotated in the base. The two side supports of the rotator are fixed on the outside of the fog gun, and rotate through a turntable at the bottom of the rotator. A water pump is arranged inside the base to extract water and spray it from the nozzle ring. A fan is arranged inside the fog gun, and the fan blows gas in the direction of the guide plate so that the fan blows away the water sprayed from the nozzle ring. The direction-changing mechanism is provided with a rotating rod, a blocking ring, a first gear rod, a blocking rod, a limiting ring, a supporting rod, and a connecting plate. The blocking ring is arranged on the inner side of the limiting ring, and the limiting ring and the rotating rod are located on the same central axis. The two first gear rods rotate synchronously, meshing the transmission rotating rod to rotate, and the rotating rod drives the connecting plate to slide in the blocking ring. Blocking rods for limiting the swing angle of the connecting plate are respectively arranged on both sides of the blocking ring, and are blocked by the blocking rods inserted into the blocking ring. The two supporting rods arranged on the upper end of the connecting plate drive the cannon mist device to move in an arc shape, and make the cannon mist device rotate around the rotator to spray water; The two first gear rods are driven to rotate by motors respectively, and the surfaces of the two first gear rods are provided with equidistantly arranged tooth blocks, so as to drive the first gear rods to rotate and drive the connecting plate to swing by the motors.

[0005] A better technical solution: the rotating rod includes a second gear rod and a connecting rod. The second gear rod is meshed with the first gear rod and drives the two first springs arranged on the outside of the connecting rod to stretch. The movable plate is arranged on the outside of the connecting plate and drives the connecting plate to move in an arc shape.

[0006] A better technical solution: the surface of the blocking ring is provided with a track groove, the connecting plate slides in the track groove, circular grooves are equidistantly provided in the track groove, the blocking rod is inserted into the circular groove and limits the swing angle of the connecting plate.

[0007] A preferred technical solution: There are four symmetrically distributed circular grooves in the track groove, and after the two side baffles are inserted into the track groove, the maximum arc formed by the two baffles on both sides of the connecting plate is 180°, and the minimum arc is 120°.

[0008] A better technical solution: the support rod includes a sliding rod, a forked rod, and a telescopic rod. The telescopic rod is connected to the sliding rod through the forked rod. The bearing arranged in the middle of the sliding rod slides in an arc in a limiting ring. The telescopic rod is connected to the lower end of the cannon fogger.

[0009] A preferred technical solution: the telescopic rod is divided into an inner tube and an outer tube, the surfaces of the inner and outer tubes are both provided with holes, and the telescopic rod is fixed by a pin that simultaneously penetrates the holes provided on the surfaces of the inner and outer tubes.

[0010] A better technical solution: the guide plate is provided with a second spring, a support frame, a plastic plate, and a circulation groove. The plastic plate is divided into four pieces by the three circulation grooves on the same central axis, and the outermost plastic plate is arranged on the side of the support frame. The surfaces of the other three plastic plates are provided with a second spring, and the second spring is fixed to the side of the support frame. The gas blown out by the fan passes through the support frame and acts on the plastic plate. The gas blows the plastic plate to stretch the second spring and increase the gap of the circulation groove among the four plastic plates.

[0011] A better technical solution: the three circulation grooves are arranged obliquely in the plastic plate, the smallest circulation groove is inclined at 45°, and the largest circulation groove is inclined at 135°. The gas blown out by the fan drives the plastic plate to stretch and is blown out from the three circulation grooves in different directions.

[0012] A working method of a dust suppression device based on green building construction: the working method comprises the following specific steps: S1: The base is transported to the building construction site, and the water pump inside the base is connected to the water storage barrel, so as to control the water transported by the water pump pipeline to spray water from the ring position of the nozzle to the middle in an inclined manner; S2: Control the fan in the cannon fogger to blow gas toward the guide plate, and scatter and blow out the water sprayed by the nozzle ring under the dispersion of gas by the guide plate. The obliquely sprayed water is blown in three directions and dispersed into water mist; S3: When spraying water mist to moisten the air for dust reduction, the motor inside the control base rotates the two first gear rods synchronously, and drives the rotating rod to rotate left and right, and the connecting plate slides in the blocking ring while the supporting rod slides in the limiting ring, and drives the cannon fogger to swing back and forth with the rotator as the center; S4: While the rotating rod rotates left and right, insert the blocking rod into the blocking ring, adjust the blocking position of the blocking rod on the connecting plate in the middle of the blocking ring, and then the connecting plate is blocked by the blocking rod when it rotates with the rotating rod, so that the maximum angle of the cannon fogger driven by the connecting plate is changed and adjusted; S5: The telescopic rod is connected to the support of the cannon fog device, and the fixed position of the telescopic rod is adjusted by a latch, and the elevation angle of the cannon fog device supported by the telescopic rod is adjusted.

[0013] Compared with the prior art, this technical solution has the following advantages: In the present invention, the motor drives the two first gear rods to rotate synchronously, and the rotating rod drives the connecting plate to swing back and forth. At this time, the connecting plate slides at the blocking ring position, and the support rod is limited in an arc-shaped sliding manner in the limit ring. Before rotating the rotating rod, the position of the blocking rod inserted into the blocking ring is manually adjusted. The blocking rod blocks the connecting plate, and then the arc-shaped rotation range of the fog gun supported by the support rod is adjusted to prevent the fog gun from rotating in a range that is too large or too small. By adjusting the rotation angle, a large range of water mist can be sprayed to reduce air humidity and achieve dust reduction effect, and the rotation range can be adjusted according to needs.

[0014] In the present invention, the support frame is fixed on the inner side of the outlet end of the cannon fogger, and the gas blown out by the fan blows the plastic plate to stretch the second spring, and makes the gas blown out by the fan be blown out in a circular shape in three different directions from the three circulation grooves, thereby increasing the dispersion effect of moisture, and cooperating with the cannon fogger driven by the rotator to swing back and forth, thereby increasing the range of the air sprayed water mist and the dispersion effect of moisture, making the formed water mist too dispersed and not accumulated, increasing the residence time of the water mist in the air, and improving the air humidification effect on air dust reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0016] Figure 1 This is an overall diagram of the present invention.

[0017] Figure 2 It is a plan view of the direction-changing mechanism.

[0018] Figure 3 A three-dimensional schematic diagram of a rotating rod.

[0019] Figure 4 A partial three-dimensional schematic diagram of the barrier ring.

[0020] Figure 5 A three-dimensional schematic diagram of the support rod.

[0021] Figure 6 It is a cross-sectional stereoscopic schematic diagram of the guide plate.

[0022] Figure 7 A schematic plan view of the guide plate.

[0023] In the figure: direction-changing mechanism-1, guide plate-2, rotator-3, base-4, spray gun-5, nozzle ring-6.

[0024] Rotating rod 11, blocking ring 12, first gear rod 13, blocking rod 14, limiting ring 15, supporting rod 16, connecting plate 17, second gear block rod 111, first spring 112, connecting rod 113, movable plate 114.

[0025] Track groove-122, bifurcated rod-161, telescopic rod-162, sliding rod-163.

[0026] The second spring 21, the support frame 22, the plastic plate 23, and the circulation groove 24. DETAILED DESCRIPTION

[0027] like Figures 1 to 7 As shown, the present invention proposes a dust suppression device based on green house construction, including a redirection mechanism 1, a guide plate 2, a rotator 3, a base 4, a fog gun 5, and a nozzle ring 6. The redirection mechanism 1 is vertically arranged on the lower surface of the fog gun 5, and supported and rotated in the base 4. The two sides of the rotator 3 are supported and fixed on the outside of the fog gun 5, and rotate through the turntable at the bottom of the rotator 3. A water pump is arranged inside the base 4 to extract water and spray it from the nozzle ring 6. A fan is arranged inside the fog gun 5, and the fan blows gas in the direction of the guide plate 2, so that the fan blows away the water sprayed from the nozzle ring 6; The direction-changing mechanism 1 is provided with a rotating rod 11, a blocking ring 12, a first gear rod 13, a blocking rod 14, a limiting ring 15, a supporting rod 16, and a connecting plate 17. The blocking ring 12 is arranged on the inner side of the limiting ring 15, and the limiting ring 15 and the rotating rod 11 are located on the same central axis. The two first gear rods 13 rotate synchronously, meshing the transmission rotating rod 11 to rotate, and the rotating rod 11 drives the connecting plate 17 to slide in the blocking ring 12. The blocking ring 12 is respectively provided with blocking rods 14 on both sides for limiting the swing angle of the connecting plate 17, and is blocked by the blocking rods 14 inserted into the blocking ring 12. The two supporting rods 16 arranged on the upper end of the connecting plate 17 drive the cannon fog device 5 to move in an arc shape, and make the cannon fog device 5 rotate around the rotator 3 as the center to spray water; The two first gear rods 13 are driven to rotate by motors respectively, and the surfaces of the two first gear rods 13 are provided with equidistantly arranged tooth blocks, so that the motors can drive the first gear rods 13 to rotate and drive the connecting plate 17 to swing.

[0028] In the present invention, the water pump draws water in the base 4 and sprays it from the nozzle ring 6, and blows the water out to form water mist through the fan in the fog gun 5. When the air humidity is increased to settle dust, the motor inside the base 4 drives the two first gear rods 13 to rotate synchronously, and makes the rotating rod 11 drive the connecting plate 17 to swing back and forth. At this time, the connecting plate 17 slides at the position of the blocking ring 12, and makes the support rod 16 slide in an arc shape in the limit ring 15. Before rotating the rotating rod 11, the position of the blocking rod 14 inserted into the blocking ring 12 is manually adjusted. The blocking rod 14 can block the connecting plate 17, and then adjust the arc rotation range of the fog gun 5 supported by the support rod 16 to prevent the rotation range of the fog gun 5 from being too large or too small. The water mist sprayed by the guide plate 2 is relatively loose, and the dust reduction effect is achieved by adjusting the rotation angle to achieve a large-scale spraying of water mist to reduce air humidity.

[0029] Among them, the rotating rod 11 includes a second gear rod 111 and a connecting rod 113. The second gear rod 111 is meshed with the first gear rod 13 and drives the two first springs 112 arranged on the outside of the connecting rod 113 to stretch. The movable plate 114 is arranged on the outside of the connecting plate 17 and drives the connecting plate 17 to move in an arc.

[0030] In addition, a track groove 122 is provided on the surface of the blocking ring 12, and the connecting plate 17 slides in the track groove 122. Circular grooves are equidistantly provided in the track groove 122, and the blocking rod 14 is inserted into the circular groove to limit the swing angle of the connecting plate 17.

[0031] Furthermore, there are four circular grooves symmetrically distributed in the track groove 122 , and after the blocking rods 14 on both sides are inserted into the track groove 122 , the maximum arc formed by the two blocking rods 14 on both sides of the connecting plate 17 is 180°, and the minimum arc is 120°.

[0032] In the present invention, the connecting plate 17 slides in the track groove 122 in the middle of the blocking ring 12, and the arc-shaped rotation range of the connecting plate 17 is blocked by the blocking rod 14 in the blocking ring 12, thereby limiting the rotation range of the fog gun 5 supported by the support rod 16. By adjusting the position of the blocking rod 14 and blocking the sliding length of the connecting plate 17 on the blocking ring 12, the rotation range of the fog gun 5 is limited to the track groove 122.

[0033] Among them, the support rod 16 includes a sliding rod 163, a forked rod 161, and a telescopic rod 162. The telescopic rod 162 is connected to the sliding rod 163 through the forked rod 161. The bearing arranged in the middle of the sliding rod 163 slides in an arc in the limiting ring 15. The telescopic rod 162 is connected to the lower end of the cannon fog device 5.

[0034] Furthermore, the telescopic rod 162 is divided into an inner tube and an outer tube, and holes are arranged on the surfaces of the inner and outer tubes. The telescopic rod 162 is fixed by a pin that simultaneously passes through the holes arranged on the surfaces of the inner and outer tubes.

[0035] In the present invention, after the connecting rod 113 drives the first spring 112 to rotate, when the connecting plate 17 connected to the movable plate 114 slides to the position of the blocking rod 14 in the blocking ring 12, the connecting plate 17 is blocked by the blocking rod 14. At this time, the connecting rod 113 continues to be driven to rotate by the second tooth block rod 111 and the tooth block on the left side of the first gear rod 13. Therefore, when the connecting plate 17 is blocked, the connecting rod 113 continues to rotate and is pulled and bent by the first spring 112. The connecting rod 113 continues to rotate and is elastically bent by the first spring 112 to prevent the continued rotation of the connecting rod 113 from being affected, so that the connecting rod 113 rotates 180° left and right, and the blocking of the connecting plate 17 by the blocking rod 14 is used to achieve the effect of adjusting the rotation range.

[0036] In the present invention, the sliding rod 163 is fixed in the connecting plate 17 while the bearing part slides in an arc shape in the limiting ring 15, so that the fogger 5 supported by the upper end of the telescopic rod 162 maintains an arc-shaped rotation, and the support height is adjusted by the telescopic rod 162 to adjust the elevation angle of the fogger 5, thereby increasing the spraying angle of the fogger 5, increasing the spraying height of the water mist and extending the time it takes to fall to the ground, so that the water mist can stay in the air longer, thereby improving the effect of humidifying the air and reducing dust.

[0037] The guide plate 2 is provided with a second spring 21, a support frame 22, a plastic plate 23, and a circulation groove 24. The plastic plate 23 is divided into four pieces by three circulation grooves 24 on the same central axis, and the outermost plastic plate 23 is arranged on the side of the support frame 22. The surfaces of the other three plastic plates 23 are provided with a second spring 21, and the second spring 21 is fixed to the side of the support frame 22. The gas blown by the fan passes through the support frame 22 and acts on the plastic plate 23. The gas blows the plastic plate 23 to stretch the second spring 21 and increase the gap between the four plastic plates 23 by the circulation groove 24.

[0038] Furthermore, the three circulation grooves 24 are arranged obliquely in the plastic plate 23 , the smallest circulation groove 24 is inclined at 45°, and the largest circulation groove 24 is inclined at 135°. The gas blown out by the fan drives the plastic plate 23 to stretch and is blown out from the three circulation grooves 24 in different directions.

[0039] In the present invention, the support frame 22 is fixed on the inner side of the outlet end of the mist gun 5, and the gas blown out by the fan blows the plastic plate 23 to stretch the second spring 21, and makes the gas blown out by the fan be blown out in a circular shape in three different directions from the three circulation grooves 24, so that the moisture sprayed by the nozzle ring 6 is blown to three different directions, thereby increasing the dispersion effect of the moisture, and cooperating with the mist gun 5 driven by the rotator 3 to swing back and forth, the range of the air spraying water mist is increased while increasing the dispersion effect of the moisture, so that the formed water mist is too dispersed and not accumulated, and the residence time of the water mist in the air is increased, thereby improving the air humidification effect on air dust reduction.

[0040] A working method of a dust suppression device based on green building construction: the working method comprises the following specific steps: S1: The base 4 is transported to the building construction site, and the water pump inside the base 4 is connected to the water storage barrel, so as to control the water transported by the water pump pipeline to spray water in a circular shape from the position of the nozzle ring 6 to the middle; S2: Control the fan in the cannon fogger 5 to blow gas toward the guide plate 2, and scatter and blow out the water sprayed by the nozzle ring 6 under the dispersion of gas by the guide plate 2, and the obliquely sprayed water is blown in three directions to disperse into water mist; S3: When spraying water mist to moisten the air for dust reduction, the motor inside the control base 4 rotates the two first gear rods 13 synchronously, and drives the rotating rod 11 to rotate left and right, and the connecting plate 17 slides in the blocking ring 12 while the support rod 16 slides in the limiting ring 15, and drives the cannon fogger 5 to swing back and forth with the rotator 3 as the center; S4: While the rotating rod 11 rotates left and right, the blocking rod 14 is inserted into the blocking ring 12, and the blocking position of the blocking rod 14 on the connecting plate 17 in the middle of the blocking ring 12 is adjusted, so that the connecting plate 17 is blocked by the blocking rod 14 when rotating with the rotating rod 11, so that the maximum angle of rotation of the cannon fog device 5 driven by the connecting plate 17 is changed and adjusted; S5: The telescopic rod 162 is connected to the support of the cannon fog device 5, and the fixed position of the telescopic rod 162 is adjusted by a latch, and the elevation angle of the cannon fog device 5 supported by the telescopic rod 162 is adjusted.

[0041] The above description is only a preferred embodiment of the present invention, and therefore cannot be used to limit the scope of the present invention. That is, equivalent changes and modifications made according to the patent scope of the present invention and the contents of the specification should still fall within the scope of the present invention.

Claims

1. A dust suppression device based on green building construction, characterized in that: The invention comprises a direction-changing mechanism (1), a guide plate (2), a rotator (3), a base (4), a spray gun (5), and a nozzle ring (6), wherein the direction-changing mechanism (1) is vertically arranged on the lower surface of the spray gun (5) and supported and rotated in the base (4), the two sides of the rotator (3) are supported and fixed on the outer side of the spray gun (5) and rotated by a turntable at the bottom of the rotator (3), a water pump is arranged inside the base (4) to extract water and spray it from the nozzle ring (6), and a fan is arranged inside the spray gun (5), and the fan blows gas in the direction of the guide plate (2) so that the fan blows away the water sprayed from the nozzle ring (6); The direction-changing mechanism (1) is provided with a rotating rod (11), a blocking ring (12), a first gear rod (13), a blocking rod (14), a limiting ring (15), a supporting rod (16), and a connecting plate (17); the blocking ring (12) is arranged inside the limiting ring (15), and the limiting ring (15) and the rotating rod (11) are located on the same central axis; the two first gear rods (13) rotate synchronously, meshing with the rotating rod (11) to rotate, and the rotating rod (11) drives the connecting plate (17) to slide in the blocking ring (12); blocking rods (14) for limiting the swing angle of the connecting plate (17) are respectively arranged on both sides of the blocking ring (12), and are blocked by the blocking rods (14) inserted into the blocking ring (12); two supporting rods (16) arranged on the upper end of the connecting plate (17) drive the spray gun (5) to move in an arc shape, and make the spray gun (5) rotate around the rotator (3) to spray water; The two first gear rods (13) are respectively driven to rotate by a motor, and the surfaces of the two first gear rods (13) are provided with tooth blocks arranged at equal distances, so that the motor drives the first gear rods (13) to rotate and drives the connecting plate (17) to swing.

2. A dust suppression device based on green building construction according to claim 1, characterized in that: The rotating rod (11) comprises a second gear rod (111) and a connecting rod (113); the second gear rod (111) meshes with the first gear rod (13) and drives two first springs (112) arranged outside the connecting rod (113) to stretch; the movable plate (114) is arranged outside the connecting plate (17) and drives the connecting plate (17) to move in an arc shape.

3. A dust suppression device based on green building construction according to claim 1, characterized in that: The surface of the blocking ring (12) is provided with a track groove (122), the connecting plate (17) slides in the track groove (122), circular grooves are equidistantly provided in the track groove (122), the blocking rod (14) is inserted into the circular groove, and limits the swing angle of the connecting plate (17).

4. A dust suppression device based on green building construction according to claim 1, characterized in that: The support rod (16) comprises a sliding rod (163), a bifurcated rod (161), and a telescopic rod (162). The telescopic rod (162) is connected to the sliding rod (163) via the bifurcated rod (161). A bearing arranged in the middle of the sliding rod (163) slides in an arc shape in a limiting ring (15). The telescopic rod (162) is connected to the lower end of the cannon fog device (5).

5. A dust suppression device based on green building construction according to claim 4, characterized in that: The telescopic rod (162) is divided into an inner tube and an outer tube, and holes are provided on the surfaces of the inner and outer tubes. The telescopic rod (162) is fixed by a pin that simultaneously penetrates the holes provided on the surfaces of the inner and outer tubes.

6. A dust suppression device based on green building construction according to claim 1, characterized in that: The guide plate (2) is provided with a second spring (21), a support frame (22), a plastic plate (23), and a circulation groove (24); the plastic plate (23) is divided into four pieces by three circulation grooves (24) on the same central axis, and the outermost plastic plate (23) is arranged on the side of the support frame (22); the surfaces of the other three plastic plates (23) are provided with a second spring (21), and the second spring (21) is fixed to the side of the support frame (22); the gas blown out by the fan passes through the support frame (22) and acts on the plastic plate (23); the gas blows the plastic plate (23) to stretch the second spring (21), and the circulation groove (24) increases the gap between the four plastic plates (23).

7. A dust suppression device based on green building construction according to claim 6, characterized in that: The three circulation grooves (24) are arranged in an inclined manner in the plastic plate (23), the smallest circulation groove (24) is inclined at 45 degrees, and the largest circulation groove (24) is inclined at 135 degrees. The gas blown out by the fan drives the plastic plate (23) to stretch and is blown out from the three circulation grooves (24) in different directions.

8. A working method of a dust suppression device for green building construction according to claim 4: characterized in that, The working method comprises the following specific steps: S1: The base (4) is transported to the building construction site, and the water pump inside the base (4) is connected to the water storage barrel, so as to control the water transported by the water pump pipeline to spray water in a circular shape from the nozzle ring (6) to the middle; S2: Control the fan in the cannon fogger (5) to blow gas toward the guide plate (2), and disperse the water sprayed by the nozzle ring (6) under the dispersion of the gas by the guide plate (2), so that the obliquely sprayed water is blown in three directions and dispersed into water mist; S3: When spraying water mist to moisten the air for dust reduction, the motor inside the control base (4) causes the two first gear rods (13) to rotate synchronously, and drives the rotating rod (11) to rotate left and right, and the connecting plate (17) slides in the blocking ring (12) while the supporting rod (16) slides in the limiting ring (15), and drives the cannon fogger (5) to swing back and forth with the rotator (3) as the center; S4: While the rotating rod (11) rotates left and right, the blocking rod (14) is inserted into the blocking ring (12), and the blocking position of the blocking rod (14) on the connecting plate (17) in the middle of the blocking ring (12) is adjusted, so that the connecting plate (17) is blocked by the blocking rod (14) when rotating with the rotating rod (11), so that the maximum angle of rotation of the cannon fog device (5) driven by the connecting plate (17) is changed and adjusted; S5: The telescopic rod (162) is connected to the support of the cannon fog device (5), and the fixed position of the telescopic rod (162) is adjusted by a latch, and the elevation angle of the cannon fog device (5) supported by the telescopic rod (162) is adjusted.

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