A dust removal device for building ventilation duct

Abstract

The present invention relates to a dust removal device, and in particular to a dust removal device for building ventilation ducts. The technical problem of the present invention is to provide a dust removal device for building ventilation ducts that can automatically remove dust from ventilation ducts. A dust removal device for building ventilation ducts includes a base, a support plate, a first rotating shaft, a fan, a motor, a sprinkler mechanism and a manual pressing mechanism. A support plate is provided on one side of the top of the base, a first rotating shaft is rotatably provided in the middle of the support plate, a fan is provided on the first rotating shaft, a motor is provided on the fan, a sprinkler mechanism is provided on the base, and a manual pressing mechanism is connected between the base and the sprinkler mechanism. The user places the device in the ventilation duct, drives the second rotating shaft to rotate through the bidirectional motor to rotate the wheel, and drives the fan to rotate through the motor at the same time, so that the fan can blow air to the ventilation duct, so that the dust inside the ventilation duct can be blown down, so that the ventilation duct can be automatically dusted.

Description

Technical Field

[0001] The invention relates to a dust removal device, in particular to a dust removal device for a building ventilation duct. Background Art

[0002] When constructing a building, large ventilation ducts are generally designed according to demand so that every location of the industrial building can be in a ventilated state.

[0003] Large ventilation ducts are generally exposed to the outside world, which will cause a lot of dust to accumulate in the large ventilation ducts. Workers are required to clean them regularly to prevent them from being abandoned. Large ventilation ducts are large, and people generally need to bend down and get into the ventilation ducts to perform simple dust removal on them, which makes it inconvenient for workers to clean them, and the cleaning tools that workers can carry are limited, which makes the dust removal effect low.

[0004] Therefore, it is necessary to design a dust removal device for building ventilation ducts that can automatically remove dust from the ventilation ducts. Summary of the invention

[0005] In order to overcome the disadvantages that people generally need to bend down and crawl into the ventilation duct to simply remove dust from the ventilation duct, which makes it inconvenient for workers to clean and the cleaning tools that workers can carry are limited, resulting in low dust removal effect, the technical problem of the present invention is: to provide a dust removal device for building ventilation ducts that can automatically remove dust from the ventilation duct.

[0006] A dust removal device for building ventilation ducts includes a base, a support plate, a first rotating shaft, a fan, a motor, a sprinkler mechanism and a manual pressing mechanism. A support plate is provided on one side of the top of the base, a first rotating shaft is rotatably provided in the middle of the support plate, a fan is provided on the first rotating shaft, a motor is provided on the fan, a sprinkler mechanism is provided on the base, and a manual pressing mechanism is connected between the base and the sprinkler mechanism.

[0007] In a preferred embodiment of the present invention, the sprinkler mechanism includes a support frame, a first fixed rod, a cylinder, a first pressure plate, a movable plate and a nozzle. A support frame is provided on the side of the top of the base away from the support plate, four first fixed rods are provided on one side of the top of the base, a cylinder is provided on the support frame, a first pressure plate is provided on the telescopic rod of the cylinder, a movable plate is slidably provided between two adjacent first fixed rods, nozzles are provided on the outer sides of the movable plates, and the movable plates are connected to the first pressure plates.

[0008] In a preferred embodiment of the present invention, the manual pressing mechanism includes a water tank, a second pressure plate, a first spring, a hose, a limiting ring, a baffle, a first torsion spring and a piston. A water tank is provided on the side of the top of the base away from the support plate, a second pressure plate is slidably provided in the water tank, a first spring is connected between the second pressure plate and the water tank, hoses are connected to the upper positions on both sides of the water tank, the hoses are connected to the nozzles on the same side, limiting rings are provided on the inner sides of the lower positions of the hoses, baffles are rotatably provided on the inner sides of the lower positions of the hoses, two first torsion springs are connected between the baffle and the hose, and a piston is movably provided on one side of the water tank.

[0009] In a preferred embodiment of the present invention, it also includes a stretching mechanism, which includes a handle, a pull rope, a first fixed plate, a clamping rod, a first rotating plate and a second torsion spring. The first fixed plate is sleeved on one side of the base, and a pull rope is connected to one side of the first fixed plate. The pull rope is connected to the handle. A clamping rod is rotatably provided on the lower side of the first fixed plate, and a first rotating plate is provided on the clamping rod. Second torsion springs are connected between the clamping rod and the first fixed plate on both sides.

[0010] In a preferred embodiment of the present invention, it also includes a moving mechanism, the moving mechanism includes a second fixed plate, a second rotating shaft, wheels, a bidirectional motor and a first flat belt, second fixed plates are symmetrically provided on both sides of the bottom of the base, a second rotating shaft is rotatably provided between the two second fixed plates on one side, and second rotating shafts are also rotatably provided on the two second fixed plates on the other side, the number of second rotating shafts is three, wheels are provided on both sides of the second rotating shaft on one side, and wheels are also provided on the second rotating shaft on the other side, a fixed frame is provided on the right side of the bottom of the base, a bidirectional motor is provided on the fixed frame, the output shafts on both sides of the bidirectional motor are respectively connected to the two second rotating shafts on the right side, and a first flat belt is wound around the second rotating shaft on one side and the second rotating shaft on the other side through a first pulley.

[0011] In a preferred embodiment of the present invention, it also includes an automatic pressing mechanism, which includes a first bracket, a special-shaped plate, a second bracket, a second rotating plate and a third torsion spring. The first bracket is connected between the movable plates, the special-shaped plate is provided on the first bracket, the second bracket is provided at a position close to the first bracket on the top of the base, the second rotating plate is rotatably provided on the second bracket, and the third torsion spring is connected between the second rotating plate and the second bracket on both sides.

[0012] In a preferred embodiment of the present invention, it also includes a rotating mechanism, which includes a wedge plate, a slide rail, a skateboard, a second spring, a rack, a second fixed rod, a third spring and a gear. A wedge plate is provided on one side of the first pressure plate, a slide rail is provided on one side of the top of the support plate, a skateboard is slidably provided on the slide rail, the top of the skateboard is connected to the first rotating shaft, a second spring is connected between both sides of the skateboard and the slide rail, a second fixed rod is provided on the support plate, a rack is slidably provided on the second fixed rod, a third spring is connected between the rack and the second fixed rod, and a gear is provided on the lower side of the first rotating shaft.

[0013] In a preferred embodiment of the present invention, a cleaning mechanism is also included, which includes a third bracket, a third rotating shaft, a brush, a fourth bracket, a grooved rod, a third fixed rod and a second flat belt. Four third brackets are provided on the support frame, and a third rotating shaft is rotatably provided between the third brackets on the upper and lower sides. Brushes are provided on the upper and lower sides of the third rotating shaft, and fourth brackets are provided on the front and rear sides of the support frame. The fourth brackets are rotatably provided with grooved rods, and third fixed rods are provided on the nozzles. The third fixed rods are slidably matched with the grooved rods, and the grooved rods and the adjacent third rotating shafts are connected with second flat belts through second pulleys.

[0014] Compared with the prior art, the present invention has the following advantages: 1. The user places the device in the ventilation duct, and drives the second rotating shaft to rotate through the bidirectional motor to rotate the wheel, and at the same time drives the fan to rotate through the motor, so that the fan can blow air to the ventilation duct, so that the dust inside the ventilation duct can be blown down, so that the ventilation duct can be automatically dusted.

[0015] 2. The special-shaped plate moves up and down and intermittently contacts the second pressing plate, so that the second pressing plate moves up and down, so that the second pressing plate squeezes the water in the water tank to the hose, so that the water in the hose is sprayed out through the nozzle, so that the dust can be reduced in the ventilation pipe.

[0016] 3. When the device automatically moves to reduce dust in the ventilation pipe, the user holds the handle to release the pull rope, thereby controlling the wheel rolling to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0018] Figure 2 It is a schematic diagram of a first partial three-dimensional structure of the present invention.

[0019] Figure 3 It is a schematic diagram of a second partial three-dimensional structure of the present invention.

[0020] Figure 4 It is a schematic diagram of a third partial three-dimensional structure of the present invention.

[0021] Figure 5 It is a schematic diagram of the first partial three-dimensional structure of the sprinkler mechanism of the present invention.

[0022] Figure 6 It is a schematic diagram of a second partial three-dimensional structure of the sprinkler mechanism of the present invention.

[0023] Figure 7 It is a schematic diagram of the first partial three-dimensional structure of the manual pressing mechanism of the present invention.

[0024] Figure 8 It is a schematic diagram of a second partial three-dimensional structure of the manual pressing mechanism of the present invention.

[0025] Fig. 9 It is a schematic diagram of the third partial three-dimensional structure of the manual pressing mechanism of the present invention.

[0026] Fig.10 It is a schematic diagram of a fourth partial three-dimensional structure of the manual pressing mechanism of the present invention.

[0027] Fig.11 It is a schematic diagram of the first partial three-dimensional structure of the stretching mechanism of the present invention.

[0028] Fig.12 It is a schematic diagram of a second partial three-dimensional structure of the stretching mechanism of the present invention.

[0029] Fig.13 It is a schematic diagram of a third partial three-dimensional structure of the stretching mechanism of the present invention.

[0030] Fig.14 It is a schematic diagram of a first partial three-dimensional structure of the moving mechanism of the present invention.

[0031] Fig.15 It is a schematic diagram of a second partial three-dimensional structure of the moving mechanism of the present invention.

[0032] Fig.16 It is a schematic diagram of the first partial three-dimensional structure of the automatic pressing mechanism of the present invention.

[0033] Fig.17 It is a schematic diagram of a second partial three-dimensional structure of the automatic pressing mechanism of the present invention.

[0034] Fig.18 It is a schematic diagram of the first partial three-dimensional structure of the rotating mechanism of the present invention.

[0035] Fig.19 It is a schematic diagram of a second partial three-dimensional structure of the rotating mechanism of the present invention.

[0036] Fig. 20 It is a schematic diagram of the first partial three-dimensional structure of the cleaning mechanism of the present invention.

[0037] Fig.21 It is a schematic diagram of the second partial three-dimensional structure of the cleaning mechanism of the present invention.

[0038] The markings of the components in the accompanying drawings are as follows: 1. base, 2. support plate, 3. first rotating shaft, 4. fan, 5. motor, 6. sprinkler mechanism, 61. support frame, 62. first fixed rod, 63. cylinder, 64. first pressure plate, 65. movable plate, 66. nozzle, 7. manual pressing mechanism, 71. water tank, 72. second pressure plate, 73. first spring, 74. hose, 75. limiting ring, 76. baffle, 77. first torsion spring, 78. piston, 8. stretching mechanism, 81. handle, 82. pull rope, 83. first fixed plate, 84. clamping rod, 85. first rotating plate, 86. second torsion spring, 9. moving mechanism, 91. second fixed plate, 92 , the second rotating shaft, 93, the wheel, 94, the bidirectional motor, 95, the first flat belt, 10, the automatic pressing mechanism, 101, the first bracket, 102, the special-shaped plate, 103, the second bracket, 104, the second rotating plate, 105, the third torsion spring, 11, the rotating mechanism, 111, the wedge plate, 112, the slide rail, 113, the slide plate, 114, the second spring, 115, the rack, 116, the second fixed rod, 117, the third spring, 118, the gear, 12, the cleaning mechanism, 121, the third bracket, 122, the third rotating shaft, 123, the brush, 124, the fourth bracket, 125, the groove stick, 126, the third fixed rod, 127, the second flat belt. DETAILED DESCRIPTION

[0039] First of all, it should be pointed out that in the different described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosure contained in the entire description can be transferred to the same parts with the same reference numerals or the same component names. Selected positional descriptions in the description, such as top, bottom, lateral, etc., also refer to the directly described and shown figures and are transferred to the new positions in the case of a change in position.

[0040] Example 1

[0041] A dust removal device for building ventilation ducts, such as Figure 1-10 As shown, it includes a base 1, a support plate 2, a first rotating shaft 3, a fan 4, a motor 5, a sprinkler mechanism 6 and a manual pressing mechanism 7. A support plate 2 is provided on the left side of the top of the base 1, a first rotating shaft 3 is rotatably provided in the middle of the support plate 2, a fan 4 is provided on the first rotating shaft 3, a motor 5 is provided on the fan 4, a sprinkler mechanism 6 is provided on the base 1, and a manual pressing mechanism 7 is connected between the base 1 and the sprinkler mechanism 6.

[0042] The sprinkler mechanism 6 includes a support frame 61, a first fixed rod 62, a cylinder 63, a first pressure plate 64, a movable plate 65 and a nozzle 66. A support frame 61 is provided on the top right side of the base 1, and the first fixed rods 62 are symmetrically provided on the front and rear sides of the top right side of the base 1. A cylinder 63 is provided on the support frame 61, and a first pressure plate 64 is provided on the telescopic rod of the cylinder 63. A movable plate 65 is slidably provided between two adjacent first fixed rods 62, and a nozzle 66 is provided on the outer side of the movable plate 65, and the movable plate 65 is connected to the first pressure plate 64.

[0043] The manual pressing mechanism 7 includes a water tank 71, a second pressure plate 72, a first spring 73, a hose 74, a limiting ring 75, a baffle 76, a first torsion spring 77 and a piston 78. A water tank 71 is provided on the top right side of the base 1, and a second pressure plate 72 is slidably provided in the water tank 71. A first spring 73 is connected between the second pressure plate 72 and the water tank 71. The upper positions of the front and rear sides of the water tank 71 are connected to hoses 74, and the hoses 74 are connected to the nozzles 66 on the same side. A limiting ring 75 is provided on the inner side of the lower position of the hose 74, and a baffle 76 is rotatably provided on the inner side of the lower position of the hose 74. Two first torsion springs 77 are connected between the baffle 76 and the hose 74, and a piston 78 is movably provided on the upper left side of the water tank 71.

[0044] When the user needs to remove dust from the ventilation pipe, the user can use the device, remove the piston 78, inject a certain amount of water into the water tank 71, and then put the piston 78 back to its original position. Since the ventilation pipe is large, the user places the device in the ventilation pipe, and then starts the motor 5. The motor 5 drives the fan 4 to rotate, so that the fan 4 can blow air to the ventilation pipe, so that the dust inside the ventilation pipe can be blown down. At the same time, the user moves the second pressing plate 72 up and down, the first spring 73 deforms adaptively, and the second pressing plate 72 presses the water in the water tank 71 to the hose 74 and sprays it out through the nozzle 66. When the water in the hose 74 flows, When the baffle plate 76 rotates and the first torsion spring 77 is deformed, and the second pressure plate 72 does not squeeze the water in the water tank 71, under the reset action of the first torsion spring 77 and the limiting action of the limiting ring 75, the baffle plate 76 rotates in the opposite direction to block the hose 74, so that the water in the hose 74 cannot flow back. The user starts the cylinder 63, and the telescopic rod of the cylinder 63 drives the first pressure plate 64 to move up and down, and the first pressure plate 64 drives the movable plate 65 and the nozzle 66 to move up and down, so that the nozzle 66 sprays water to reduce dust from the ventilation pipe in many aspects. After the dust removal is completed, the device is removed from the ventilation pipe, and then the cylinder 63 and the motor 5 are turned off.

[0045] Example 2

[0046] On the basis of Example 1, Figure 1 , Fig.11 , Fig.12 , Fig.13 , Fig.14 , Fig.15 , Fig.16 , Fig.17 , Fig.18 , Fig.19 , Fig. 20 and Fig.21 As shown, it also includes a stretching mechanism 8, which includes a handle 81, a pull rope 82, a first fixed plate 83, a clamping rod 84, a first rotating plate 85 and a second torsion spring 86. The first fixed plate 83 is sleeved on the right front side of the base 1, and the pull rope 82 is connected to the right side of the first fixed plate 83. The pull rope 82 is connected to the handle 81. The lower side of the first fixed plate 83 is rotatably provided with a clamping rod 84, and the clamping rod 84 is provided with a first rotating plate 85. The second torsion spring 86 is connected between the front and rear sides of the clamping rod 84 and the first fixed plate 83.

[0047] It also includes a moving mechanism 9, which includes a second fixed plate 91, a second rotating shaft 92, wheels 93, a bidirectional motor 94 and a first flat belt 95. The second fixed plates 91 are symmetrically arranged on the left and right sides of the bottom of the base 1. A second rotating shaft 92 is rotatably arranged between the two second fixed plates 91 on the left, and the two second fixed plates 91 on the right are also rotatably arranged with second rotating shafts 92. The number of second rotating shafts 92 is three, and wheels 93 are arranged on the front and back sides of the second rotating shaft 92 on the left, and wheels 93 are also arranged on the second rotating shaft 92 on the right. A fixing frame is provided on the right side of the bottom of the base 1, and a bidirectional motor 94 is provided on the fixing frame. The output shafts on the front and back sides of the bidirectional motor 94 are respectively connected to the two second rotating shafts 92 on the right, and a first flat belt 95 is wound around the second rotating shaft 92 on the left and the second rotating shaft 92 on the right rear side through a first pulley.

[0048] When the user places the device in the ventilation duct, the first rotating plate 85 and the card rod 84 can be flipped upwards, the second torsion spring 86 is deformed, and then the first fixing plate 83 is sleeved on the right front side of the base 1, and then no force is applied to the first rotating plate 85. Under the resetting action of the second torsion spring 86, the first rotating plate 85 rotates in the opposite direction to reset, and then the bidirectional motor 94 is started. The output shaft of the bidirectional motor 94 rotates to drive the two second rotating shafts 92 on the right side to rotate, and the second rotating shaft 92 on the left side is driven to rotate through the first pulley and the first flat belt 95, thereby causing the wheel 93 to rotate. In this way, the device can be automatically moved into the ventilation duct without manual follow-up. The user holds the handle 81 and continuously releases the pull rope 82. After the cleaning of the ventilation duct is completed, the output shaft of the bidirectional motor 94 is controlled to rotate in the opposite direction, so that the wheel 93 rolls in the opposite direction, thereby causing the device to automatically move out of the ventilation duct, and then the bidirectional motor 94 is turned off, and the user can reel in the pull rope 82 through the handle 81.

[0049] It also includes an automatic pressing mechanism 10, which includes a first bracket 101, a special-shaped plate 102, a second bracket 103, a second rotating plate 104 and a third torsion spring 105. The first bracket 101 is connected between the movable plates 65, the special-shaped plate 102 is provided on the right part of the first bracket 101, the second bracket 103 is provided on the right side of the top of the base 1, the second rotating plate 104 is rotatably provided on the second bracket 103, and the third torsion spring 105 is connected between the front and rear sides of the second rotating plate 104 and the second bracket 103.

[0050] Initially, the second rotating plate 104 is against the second pressure plate 72, so that the first spring 73 is in a stretched state. When the movable plate 65 drives the first bracket 101 and the special-shaped plate 102 to move up and down, the special-shaped plate 102 intermittently contacts the second rotating plate 104. Under the action of the third torsion spring 105, the second rotating plate 104 swings up and down, and the second rotating plate 104 intermittently presses the second pressure plate 72, thereby eliminating the need for manual pressing of the second pressure plate 72.

[0051] It also includes a rotating mechanism 11, which includes a wedge plate 111, a slide rail 112, a slide plate 113, a second spring 114, a rack 115, a second fixed rod 116, a third spring 117 and a gear 118. A wedge plate 111 is provided on the left side of the first pressure plate 64, a slide rail 112 is provided on the left side of the top of the support plate 2, a slide plate 113 is slidably provided on the slide rail 112, the top of the slide plate 113 is connected to the first rotating shaft 3, and the second spring 114 is connected between the front and rear sides of the slide plate 113 and the slide rail 112, a second fixed rod 116 is provided on the support plate 2, a rack 115 is slidably provided on the second fixed rod 116, a third spring 117 is connected between the rack 115 and the second fixed rod 116, and a gear 118 is provided on the lower side of the first rotating shaft 3, and the gear 118 and the rack 115 cooperate.

[0052] The first pressing plate 64 drives the wedge plate 111 to move downward, and the wedge plate 111 presses the rack 115, so that the rack 115 moves to the left, and the third spring 117 is compressed, and the rack 115 meshes with the gear 118, so that the first rotating shaft 3 drives the fan 4 and the slide plate 113 to rotate, and then the slide plate 113 slides to the rear side along the slide rail 112, and the second spring 114 is compressed. When the rack 115 moves to the left and disengages from the gear 118, under the reset action of the third spring 117, the slide plate 113 slides forward and resets along the slide rail 112, and drives the first rotating shaft 3 and the fan 4 to rotate in the opposite direction. When the first pressing plate 64 drives the wedge plate 11 1 moves upward, the wedge plate 111 no longer presses the rack 115, the third spring 117 is reset, so that the rack 115 moves to the right, and the rack 115 is meshed with the gear 118, so that the first rotating shaft 3 drives the fan 4 and the slide plate 113 to rotate, and then the slide plate 113 slides forward along the slide rail 112, and the second spring 114 is compressed. When the rack 115 moves to the right and disengages from the gear 118, under the reset action of the second spring 114, the slide plate 113 slides backward along the slide rail 112, and drives the first rotating shaft 3 and the fan 4 to rotate in the opposite direction. This is repeated, so that the rotation angle of the fan 4 can be increased, thereby improving the dust removal effect.

[0053] It also includes a cleaning mechanism 12, which includes a third bracket 121, a third rotating shaft 122, a brush 123, a fourth bracket 124, a grooved rod 125, a third fixed rod 126 and a second flat belt 127. Two third brackets 121 are provided on the front and rear sides of the right side of the support frame 61, and a third rotating shaft 122 is rotatably provided between the third brackets 121 on the upper and lower sides. Brushes 123 are provided on the upper and lower sides of the third rotating shaft 122, and fourth brackets 124 are provided on the front and rear sides of the support frame 61. Grooved rods 125 are rotatably provided on the fourth brackets 124. Third fixed rods 126 are provided on the nozzles 66. The third fixed rods 126 are slidably matched with the grooved rod 125. A second flat belt 127 is connected between the grooved rod 125 and the adjacent third rotating shaft 122 via a second pulley.

[0054] The nozzle 66 moves up and down, driving the third fixed rod 126 to move. When the third fixed rod 126 moves up and down until it contacts the grooved rod 125, the grooved rod 125 rotates. The rotation of the grooved rod 125 drives the third rotating shaft 122 and the brush 123 to rotate through the second pulley and the second flat belt 127, so that the brush 123 can clean the ventilation pipe, so that the ventilation pipe can be kept clean.

[0055] It should be understood that the above description is only for exemplary purposes and is not meant to limit the present invention. Those skilled in the art will appreciate that variations of the present invention will be included within the scope of the claims herein.

Claims

1. A dust removal device for building ventilation ducts, characterized by: The invention comprises a base (1), a support plate (2), a first rotating shaft (3), a fan (4), a motor (5), a water sprinkling mechanism (6) and a manual pressing mechanism (7), wherein a support plate (2) is provided on one side of the top of the base (1), a first rotating shaft (3) is rotatably provided in the middle of the support plate (2), a fan (4) is provided on the first rotating shaft (3), a motor (5) is provided on the fan (4), a water sprinkling mechanism (6) is provided on the base (1), and a manual pressing mechanism (7) is connected between the base (1) and the water sprinkling mechanism (6); The watering mechanism (6) comprises a support frame (61), a first fixed rod (62), a cylinder (63), a first pressure plate (64), a movable plate (65) and a nozzle (66); a support frame (61) is provided on a side of the top of the base (1) away from the support plate (2); four first fixed rods (62) are provided on one side of the top of the base (1); a cylinder (63) is provided on the support frame (61); a first pressure plate (64) is provided on a telescopic rod of the cylinder (63); a movable plate (65) is slidably provided between two adjacent first fixed rods (62); nozzles (66) are provided on the outer sides of the movable plates (65); and the movable plates (65) are connected to the first pressure plates (64); The manual pressing mechanism (7) comprises a water tank (71), a second pressing plate (72), a first spring (73), a hose (74), a limiting ring (75), a baffle (76), a first torsion spring (77) and a piston (78). A water tank (71) is provided on the top of the base (1) at a side away from the support plate (2). A second pressing plate (72) is slidably provided in the water tank (71). A first spring (73) is connected between the second pressing plate (72) and the water tank (71). The upper sides of both sides of the water tank (71) are connected to hoses (74). The hoses (74) are connected to the nozzles (66) on the same side. A limiting ring (75) is provided on the inner side of the lower side of the hose (74). A baffle (76) is rotatably provided on the inner side of the lower side of the hose (74). Two first torsion springs (77) are connected between the baffle (76) and the hose (74). A piston (78) is movably provided on one side of the water tank (71). The device also comprises a stretching mechanism (8), the stretching mechanism (8) comprising a handle (81), a pull rope (82), a first fixed plate (83), a clamping rod (84), a first rotating plate (85) and a second torsion spring (86); the first fixed plate (83) is sleeved on one side of the base (1); the pull rope (82) is connected to one side of the first fixed plate (83); the pull rope (82) is connected to the handle (81); a clamping rod (84) is rotatably provided on the lower side of the first fixed plate (83); the clamping rod (84) is provided with a first rotating plate (85); and second torsion springs (86) are connected between both sides of the clamping rod (84) and the first fixed plate (83); The mobile mechanism (9) further comprises a moving mechanism (9), which comprises a second fixed plate (91), a second rotating shaft (92), a wheel (93), a bidirectional motor (94) and a first flat belt (95). The second fixed plates (91) are symmetrically arranged on both sides of the bottom of the base (1). A second rotating shaft (92) is rotatably arranged between the two second fixed plates (91) on one side. The second rotating shaft (92) is also rotatably arranged on the two second fixed plates (91) on the other side. The number of the second rotating shafts (92) is three. Wheels (93) are arranged on both sides of the second rotating shaft (92) on one side. Wheels (93) are also arranged on the second rotating shaft (92) on the other side. A fixing frame is arranged on the right side of the bottom of the base (1). The bidirectional motor (94) is arranged on the fixing frame. The output shafts on both sides of the bidirectional motor (94) are respectively connected to the two second rotating shafts (92) on the right side. A first flat belt (95) is wound between the second rotating shaft (92) on one side and the second rotating shaft (92) on the other side via a first belt pulley. The automatic pressing mechanism (10) is also included. The automatic pressing mechanism (10) includes a first bracket (101), a special-shaped plate (102), a second bracket (103), a second rotating plate (104) and a third torsion spring (105). The first bracket (101) is connected between the movable plates (65). The special-shaped plate (102) is provided on the first bracket (101). A second bracket (103) is provided at a position near the first bracket (101) at the top of the base (1). A second rotating plate (104) is rotatably provided on the second bracket (103). The third torsion spring (105) is connected between both sides of the second rotating plate (104) and the second bracket (103).

2. A dust removal device for building ventilation ducts according to claim 1, characterized in that: The invention also comprises a rotating mechanism (11), wherein the rotating mechanism (11) comprises a wedge plate (111), a slide rail (112), a slide plate (113), a second spring (114), a rack (115), a second fixed rod (116), a third spring (117) and a gear (118); a wedge plate (111) is provided on one side of the first pressing plate (64); a slide rail (112) is provided on one side of the top of the support plate (2); a slide plate (113) is slidably provided on the slide rail (112); the top of the slide rail (113) is connected to the first rotating shaft (3); second springs (114) are connected between both sides of the slide rail (113) and the slide rail (112); a second fixed rod (116) is provided on the support plate (2); a rack (115) is slidably provided on the second fixed rod (116); a third spring (117) is connected between the rack (115) and the second fixed rod (116); and a gear (118) is provided on the lower side of the first rotating shaft (3).

3. A dust removal device for building ventilation ducts according to claim 2, characterized in that: The cleaning mechanism (12) further comprises a cleaning mechanism (12), the cleaning mechanism (12) comprising a third bracket (121), a third rotating shaft (122), a brush (123), a fourth bracket (124), a grooved rod (125), a third fixed rod (126) and a second flat belt (127). Four third brackets (121) are provided on the support frame (61), a third rotating shaft (122) is rotatably provided between the third brackets (121) on the upper and lower sides, a brush (123) is provided on the upper and lower sides of the third rotating shaft (122), a fourth bracket (124) is provided on the front and rear sides of the support frame (61), a grooved rod (125) is rotatably provided on the fourth bracket (124), a third fixed rod (126) is provided on the spray head (66), the third fixed rod (126) is slidably matched with the grooved rod (125), and a second flat belt (127) is connected between the grooved rod (125) and the adjacent third rotating shaft (122) via a second belt pulley.

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