Dust collector for constructional engineering

Abstract

The invention discloses a dust collector for constructional engineering, and relates to the technical field of dust collectors for constructional engineering, the dust collector for constructional engineering comprises a box body, a suction fan is fixed on the top of the box body, a dust hood is fixed on the top of the suction fan, a discharge pipe is fixed on the left side of the box body, and a filter screen is fixed on the inner wall of the box body. According to the dust collector for constructional engineering, when air with dust enters the heating box, dust in humid air can be dried through the arrangement of a heating ring, the problem that the dust is humid and adheres to the surface of a filter screen is solved, a rotating rod can drive a small gear to rotate by starting a motor, and therefore the dust collector is convenient to use. According to the heating device, the small gear can drive the large gear and the heating box to rotate, so that when gas enters the heating box, the heating box drives the heating ring to rotate, humid air can make uniform contact with the heating ring, the heating effect on humid dust is better, and uniform heating is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dust collectors for construction engineering, in particular to a dust collector for construction engineering. BACKGROUND

[0002] A large amount of dust will be generated at a construction site, and according to regulations, dust removal treatment must be carried out. Common methods include washing the road surface, vehicles and water spraying for dust suppression. In areas with dense building materials, targeted dust removal equipment also needs to be used.

[0003] Patent No. CN208032105U discloses a construction dust collection device. The device works by allowing external air to enter the box through the inlet hood, filtering the air through the filter, and then discharging the filtered air from the outlet hood through the inlet and outlet pipes. The surface of the filter is cleaned by the spray head, effectively improving the filtering efficiency of the filter and ultimately effectively collecting dust outside the box, reducing the impact on workers' health. However, the above-mentioned construction dust collection device has the following problems. Since water is continuously sprayed for dust suppression at the construction site, when the dust needs to be collected, the dust will be moistened by the water, causing the moist dust to easily stick to the surface of the filter when it enters the box, which can quickly clog the filter and affect its filtering effect, requiring frequent cleaning. SUMMARY

[0004] To overcome the above-mentioned problems in the background art, the present application provides a dust collector for construction engineering.

[0005] To achieve the above-mentioned purposes, the present application is implemented by the following technical solutions: a dust collector for construction engineering, comprising a box, a suction fan fixed to the top of the box, a dust suction hood fixed to the top of the suction fan, an exhaust pipe fixed to the left side of the box, a filter screen fixed to the inner wall of the box, a heating device for drying dust inside the box, an auxiliary device for intermittent exhaust inside the box, and a drying device at the bottom of the heating device. The heating device comprises a motor, a rotating rod, a pinion, a gear, a heating box, a heating ring and a guide plate. The motor is fixed to the top of the box, the rotating rod is fixed to the bottom output end of the motor, the rotating rod penetrates the top of the box and is rotatably connected at the penetration point, the pinion is fixed to the outer wall of the rotating rod, a connecting pipe is rotatably installed at the top of the inner wall of the box, and the top of the connecting pipe is in communication with the bottom output end of the suction fan. When the motor is started, it drives the rotating rod to rotate, thereby rotating the pinion.

[0006] According to the technical scheme, the heating box is fixed to the outer wall of the connecting pipe, the large gear is fixed to the outer wall of the heating box, the small gear is engaged with the large gear, and the inner wall of the heating box is slidably connected with the heating ring.

[0007] According to the technical scheme, the guide plate is fixed to the inner wall of the connecting pipe.

[0008] According to the technical scheme, the auxiliary device comprises a T-shaped rod, a semicircular block, a connecting spring, a rotating rod, a rotating block, a torsion spring, a baffle, a concave-convex plate, a connecting block, a fixed block and a reset spring; the T-shaped rod penetrates through the large gear and is slidably connected at the penetration position; the semicircular block is fixed to the top of the T-shaped rod; one side of the connecting spring is fixed to the bottom of the semicircular block; the other side of the connecting spring is fixed to the top of the large gear; when the large gear rotates, the T-shaped rod and the semicircular block are driven to rotate, so that the arc surface of the semicircular block moves in the concave-convex plate, and the semicircular block is pressed, so that the T-shaped rod is driven to move downward and the connecting spring is compressed and deformed.

[0009] According to the technical scheme, the bottom of the heating box is fixed with an exhaust hood, the exhaust hood is communicated with the heating box, the rotating rod penetrates through the heating box and is rotatably connected at the penetration position, and the baffle is fixed to the outer wall of the rotating rod.

[0010] According to the technical scheme, the rotating block is fixed to the end of the rotating rod, one side of the torsion spring is fixed to the outer wall of the rotating block, the other side of the torsion spring is fixed to the outer wall of the heating box, the connecting block is fixed to the bottom of the heating ring, the fixed block is fixed to the inner wall of the heating box, one side of the reset spring is fixed to the bottom of the heating ring, the other side of the reset spring is fixed to the top of the fixed block, and the end of the fixed block is slidably connected with the outer wall of the connecting block; when the T-shaped rod moves downward, the T-shaped rod presses the top of the rotating block, so that the rotating block drives the rotating rod to rotate, and the baffle rotates.

[0011] According to the technical scheme, the dry device comprises an inclined block, a return spring, a moving block, a transmission spring, an L-shaped tooth block, a rotating shaft, a placing frame, a dry plate, a friction ring, a disc, an inclined block, an auxiliary spring, a tooth ring, a clamping tooth and a mounting plate; the inclined block penetrates through the side wall of the exhaust hood and is slidingly connected at the penetration position; one side of the return spring is fixed to the top outer wall of the inclined block; the other side of the return spring is fixed to the outer wall of the exhaust hood; the moving block is slidingly arranged on the outer wall of the exhaust hood; one side of the transmission spring is fixed to the bottom of the moving block; and the other side of the transmission spring is fixed to the inner side of the outer wall of the exhaust hood; when the baffle rotates, the baffle extrudes the inclined block, the inclined block moves out of the exhaust hood, and the return spring is stretched; and when the inclined block moves, the inclined surface of the moving block is extruded, and the moving block moves downward under the extrusion force.

[0012] According to the technical scheme, the rotating shaft penetrates through the exhaust hood and is rotationally connected at the penetration position; the placing frame is fixed to the outer wall of the rotating shaft; the dry plate is attached to the placing frame; the mounting plate is detachably installed on the outer wall of the placing frame by means of bolts; the disc is fixed to the outer wall of the rotating shaft; the inclined block is slidingly installed on the inner wall of the disc; one side of the auxiliary spring is fixed to the inner wall of the disc; and the other side of the auxiliary spring is fixed to the bottom of the inclined block.

[0013] According to the technical scheme, the tooth ring is rotationally installed on the outer wall of the exhaust hood; the clamping teeth are fixed in a circumferential array on the inner wall of the tooth ring; the friction ring is fixed to the inner wall of the exhaust hood; and the inner wall of the friction ring is attached to the inner wall of the rotating shaft; when the moving block moves downward, the L-shaped tooth block moves downward, the teeth of the L-shaped tooth block drive the tooth ring to rotate, and the clamping teeth fixed in the tooth ring extrude the inclined block, thereby driving the disc and the rotating shaft to rotate.

[0014] The application provides a dust collector for construction engineering. 1. The heating device is provided, when the air containing dust enters the heating box, the dust in the humid air can be dried through the setting of the heating ring, the problem that the dust is relatively humid and adheres to the surface of the filter screen is solved, and the rotation of the rotating rod drives the pinion to rotate through the starting of the motor, so that the pinion drives the gear wheel and the heating box to rotate, so that when the gas enters the heating box, the rotation of the heating ring driven by the heating box can make the humid air uniformly contact with the heating ring, the heating effect of the humid dust is better, and the humid dust is uniformly heated.

[0015] 2. The auxiliary device is arranged, when the gear rotates, the cooperation of the semicircular block, the concave-convex plate, the T-shaped rod, the rotating block, the torsional spring, the rotating rod and the baffle can make the baffle open and close, thereby the effect of intermittent air discharge into the box is achieved, the residence time of the humid air in the heating box is increased, the problem that the humid air is directly discharged downward quickly when passing through the heating box and thereby the heating is uneven is solved, when the baffle is opened, the baffle does not contact the connecting block, the cooperation of the reset spring can drive the heating ring to move downward, when the baffle is closed, the connecting block and the heating ring can be pressed to reset upward, the dust attached to the outer wall of the heating ring is shaken off through the up-down shaking of the heating ring, the problem that the dust attached to the outer wall of the heating ring affects heat conduction is solved, and the drying effect on the humid dust is reduced.

[0016] 3. The drying device, when air is discharged from the exhaust hood, the effect of secondary drying of the moisture in the air is achieved through the arrangement of the drying plate, the problem that the air is still in a humid state and thereby the dust is still humid is solved, when the baffle rotates, the cooperation of the inclined block, the moving block, the L-shaped tooth block, the tooth ring, the inclined block and the disc can drive the drying plate to rotate through the rotating shaft, the drying plate can be replaced intermittently, the problem that the fixed drying plate is saturated (adsorption capacity decreases) on the side opposite to the exhaust hood when adsorbing water, thereby the subsequent air cannot be effectively dehumidified is solved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the application; Figure 2 It is a schematic diagram of the internal structure of the application; Figure 3 It is a schematic diagram of part of the structure of the application; Figure 4 It is a schematic diagram of the local structure of the application; Figure 5 It is a schematic diagram of the local sectional structure of the application; Figure 6 It is a schematic diagram of the exhaust hood structure of the application; Figure 7 It is a schematic diagram of the drying device structure of the application; Figure 8 It is a schematic diagram of part of the drying device structure of the application.

[0018] In the figure: 1, box; 2, suction fan; 3, dust cover; 4, discharge pipe; 5, filter screen; 6, connecting pipe; 71, motor; 72, rotating rod; 73, pinion; 74, heating box; 75, gear; 76, heating ring; 77, guide plate; 81, concave-convex plate; 82, T-shaped rod; 83, semicircular block; 84, connecting spring; 85, rotating rod; 86, rotating block; 87, torsional spring; 88, baffle; 89, connecting block; 810, fixed block; 811, return spring; 9, exhaust hood; 101, inclined block; 102, return spring; 103, moving block; 104, transmission spring; 105, L-shaped tooth block; 106, rotating shaft; 107, placing frame; 108, drying plate; 109, friction ring; 110, tooth ring; 111, disc; 112, auxiliary spring; 113, inclined block; 114, clamping tooth; 115, mounting plate. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0020] Please refer to Figures 1-8 An embodiment of the present application is: a dust collector for construction engineering, comprising a box 1, a suction fan 2 fixed at the top of the box 1, a dust cover 3 fixed at the top of the suction fan 2, a discharge pipe 4 fixed at the left side of the box 1, a filter screen 5 fixed on the inner wall of the box 1, and a heating device for drying dust arranged in the box 1; The heating device comprises a motor 71, a rotating rod 72, a pinion 73, a gear 75, a heating box 74, a heating ring 76 and a guide plate 77. The motor 71 is fixed at the top of the box 1, the rotating rod 72 is fixed at the bottom output end of the motor 71, the rotating rod 72 penetrates through the top of the box 1 and is rotationally connected at the penetrating position, the pinion 73 is fixed on the outer wall of the rotating rod 72, a connecting pipe 6 is rotationally installed on the top inner wall of the box 1, the top of the connecting pipe 6 is communicated with the bottom output end of the suction fan 2, the heating box 74 is fixed on the outer wall of the connecting pipe 6, the gear 75 is fixed on the outer wall of the heating box 74, the pinion 73 and the gear 75 are meshed with each other, the heating ring 76 is slidably connected on the inner wall of the heating box 74, and the guide plate 77 is fixed on the inner wall of the connecting pipe 6.

[0021] When the air with dust enters into the heating box 74, the dust in the humid air can be dried through the arrangement of the heating ring 76, solving the problem that the dust is relatively humid and adheres to the surface of the filter screen 5; and by starting the motor 71, the rotating rod 72 can drive the pinion 73 to rotate, so that the pinion 73 drives the gear wheel 75 and the heating box 74 to rotate, so that when the gas enters the heating box 74, the rotation of the heating ring 76 driven by the heating box 74 can make the humid air uniformly contact with the heating ring 76, so that the effect of heating the humid dust is better and the humid dust is uniformly heated; by arranging the guide plate 77, the air entering the heating box 74 can diffuse to both sides, so that the humid air is in large area contact with the heating ring 76, solving the problem that the air is only discharged to one position of the heating ring 76, resulting in that part of the humid air cannot be effectively heated; When the dust on the construction site needs to be collected, the device is moved to the position where collection is needed, and by starting the air suction fan 2, the dust outside can be sucked into the box body 1 through the dust suction cover 3, and the air with dust is filtered through the filter screen 5, so that the filtered air is discharged through the discharge pipe 4, and before the dust enters the box body 1 for filtering, the air enters the heating box 74, and by starting the heating wire, the humid dust entering the heating box 74 is dried, and when the motor 71 is started, the rotating rod 72 can be driven to rotate, and when the rotating rod 72 rotates, the pinion 73 can be driven to rotate, so that the pinion 73 drives the gear wheel 75 to rotate, so that the heating box 74 can be driven to rotate.

[0022] Please refer to Figures 1-8On the basis of the above-mentioned embodiment, in another embodiment of the present application, the inside of the box 1 is provided with an auxiliary device for intermittent exhaust, the bottom of the heating device is provided with a drying device, the auxiliary device comprises a T-shaped rod 82, a semicircle block 83, a connecting spring 84, a rotating rod 85, a rotating block 86, a torsional spring 87, a baffle 88, a concave-convex plate 81, a connecting block 89, a fixed block 810 and a reset spring 811; the T-shaped rod 82 penetrates through the large gear 75 and is slidingly connected at the penetration position, the semicircle block 83 is fixed at the top of the T-shaped rod 82, one side of the connecting spring 84 is fixed at the bottom of the semicircle block 83, the other side of the connecting spring 84 is fixed at the top of the large gear 75, the bottom of the heating box 74 is fixed with an exhaust hood 9, the exhaust hood 9 communicates with the heating box 74, the rotating rod 85 penetrates through the heating box 74 and is rotationally connected at the penetration position, the baffle 88 is fixed on the outer wall of the rotating rod 85, the rotating block 86 is fixed at the end point of the rotating rod 85, one side of the torsional spring 87 is fixed on the outer wall of the rotating block 86, the other side of the torsional spring 87 is fixed on the outer wall of the heating box 74, the connecting block 89 is fixed at the bottom of the heating ring 76, the fixed block 810 is fixed on the inner wall of the heating box 74, one side of the reset spring 811 is fixed at the bottom of the heating ring 76, the other side of the reset spring 811 is fixed at the top of the fixed block 810, and the end of the fixed block 810 is slidingly connected with the outer wall of the connecting block 89.

[0023] The baffle 88 is provided with two groups, and the two groups of baffles 88 are symmetrically arranged with the center line in the vertical direction of the exhaust hood 9 as the axis of symmetry, when the large gear 75 rotates, the baffle 88 can be opened and closed through the cooperation of the semicircle block 83, the concave-convex plate 81, the T-shaped rod 82, the rotating block 86, the torsional spring 87, the rotating rod 85 and the baffle 88, thereby achieving the effect of intermittent discharge of air into the box 1, increasing the residence time of humid air in the heating box 74, and solving the problem of uneven heating caused by the direct downward and rapid discharge of humid air when passing through the heating box 74. When the baffle 88 is opened, the baffle 88 does not contact the connecting block 89, and through the cooperation of the reset spring 811, the heating ring 76 can be driven to move downward, and when the baffle 88 is closed, the connecting block 89 and the heating ring 76 can be pressed to reset upward, through the up-and-down shaking of the heating ring 76, the dust attached to the outer wall of the heating ring 76 can be shaken off, solving the problem that a layer of dust attached to the outer wall of the heating ring 76 affects heat conduction, and reducing the drying effect on humid dust.

[0024] The drying device comprises an inclined block 101, a return spring 102, a moving block 103, a transmission spring 104, an L-shaped tooth block 105, a rotating shaft 106, a placing frame 107, a drying plate 108, a friction ring 109, a disc 111, an inclined block 113, an auxiliary spring 112, a tooth ring 110, a clamping tooth 114 and a mounting plate 115; the inclined block 101 penetrates through the side wall of the exhaust hood 9 and is slidingly connected at the penetration position; one side of the return spring 102 is fixed to the top outer wall of the inclined block 101, and the other side of the return spring 102 is fixed to the outer wall of the exhaust hood 9; the moving block 103 slides on the outer wall of the exhaust hood 9; one side of the transmission spring 104 is fixed to the bottom of the moving block 103, and the other side of the transmission spring 104 is fixed to the inner side of the outer wall of the exhaust hood 9; the rotating shaft 106 penetrates through the exhaust hood 9 and is rotationally connected at the penetration position; the placing frame 107 is fixed to the outer wall of the rotating shaft 106; the drying plate 108 is attached in the placing frame 107; the mounting plate 115 is detachably mounted on the outer wall of the placing frame 107 by bolts; the drying plate 108 in the placing frame 107 can be taken out and replaced by detaching the mounting plate 115; the disc 111 is fixed to the outer wall of the rotating shaft 106; the inclined block 113 is slidingly mounted on the inner wall of the disc 111; the teeth of the L-shaped tooth block 105 are engaged with the outer wall of the tooth ring 110; one side of the auxiliary spring 112 is fixed to the inner wall of the disc 111, and the other side of the auxiliary spring 112 is fixed to the bottom of the inclined block 113; the tooth ring 110 is rotationally mounted on the outer wall of the exhaust hood 9; the clamping teeth 114 are fixed in a circumferential array on the inner wall of the tooth ring 110; the friction ring 109 is fixed to the inner wall of the exhaust hood 9; the inner wall of the friction ring 109 is attached to the inner wall of the rotating shaft 106; the friction ring 109 is tightly attached to the inner wall of the rotating shaft 106 by the setting of the friction ring 109, so as to increase the friction; when the L-shaped tooth block 105 moves upward, the inclined surface of the clamping teeth 114 inside the tooth ring 110 will press the inclined surface of the inclined block 113, so as to compress the auxiliary spring 112 and make the inclined block 113 move downward; when the clamping teeth 114 abut against the inclined surface of the inclined block 113, the rotating shaft 106 will not be rotated, so as to make the drying plate 108 rotate in one direction and be replaced.

[0025] When air is discharged from the exhaust hood 9, the setting of the drying plate 108 can achieve the effect of secondary drying of the moisture in the air, solving the problem that the air is still in a humid state, resulting in the problem that dust is still humid; when the baffle 88 rotates, the cooperation of the inclined block 101, the moving block 103, the L-shaped tooth block 105, the tooth ring 110, the inclined block 113, the inclined block 113 and the disc 111 can make the rotating shaft 106 drive the drying plate 108 to rotate, so as to intermittently rotate and replace the drying plate 108, solving the problem that the fixed drying plate 108 will quickly reach saturation (decrease in adsorption capacity) when it is opposite to the exhaust hood 9 during adsorption of water, resulting in the problem that subsequent air cannot be effectively dehumidified.

[0026] When the large gear 75 rotates, the T-shaped rod 82 is rotated, the semicircle block 83 at the top of the T-shaped rod 82 is pressed against the concave slope of the concave-convex plate 81, the semicircle block 83 is pressed and moves downward, the T-shaped rod 82 moves downward, the connecting spring 84 is compressed, the bottom of the T-shaped rod 82 presses the rotating block 86, the rotating block 86 rotates downward, the rotating rod 85 rotates the baffle 88 downward, the torsional spring 87 is compressed and deformed, the air outlet cover 9 is opened, the air after drying is discharged, when the semicircle block 83 is aligned with the concave groove of the concave-convex plate 81, the connecting spring 84 is compressed, the T-shaped rod 82 moves upward, the bottom of the T-shaped rod 82 no longer presses the rotating block 86, the torsional spring 87 is in the compressed state, the rotating rod 85 and the baffle 88 are rotated upward and reset, the rotation of the large gear 75 is intermittent, the baffle 88 does not press the bottom of the connecting block 89, the reset spring 811 is in the stretched state, the reset spring 811 moves the heating ring 76 downward, when the baffle 88 rotates upward and resets, the elastic coefficient of the torsional spring 87 is five times the elastic coefficient of the reset spring 811, when the baffle 88 rotates upward, the connecting block 89 is pressed and moves upward, the heating ring 76 moves upward, and the reset spring 811 is stretched.

[0027] When the baffle 88 rotates downward, the baffle 88 extrudes the inclined block 101, the inclined block 101 is extruded to move outward of the air outlet cover 9, the return spring 102 is stretched, and when the inclined block 101 moves outward of the air outlet cover 9, the inclined surface of the inclined block 101 extrudes the inclined surface on the top of the moving block 103, when the inclined surface of the moving block 103 is extruded, the moving block 103 moves downward to compress the transmission spring 104, the moving block 103 drives the L-shaped tooth block 105 to move downward, when the L-shaped tooth block 105 moves downward, the L-shaped tooth block 105 drives the tooth ring 110 to rotate inward, so that the tooth ring 110 drives the catch 114 to rotate, the plane of the catch 114 extrudes the plane of the inclined block 113, so that the catch 114 drives the inclined block 113 to rotate, when the inclined block 113 rotates, the inclined block 113 drives the disc 111 to rotate, the rotating shaft 106 drives the placing frame 107 and the drying plate 108 to rotate and change positions; when the baffle 88 rotates upward, the baffle 88 does not extrude the inclined block 101, because the return spring 102 is in a stretched state, the return spring 102 drives the inclined block 101 to reset, so that the inclined block 101 does not extrude the moving block 103, because the transmission spring 104 is in a compressed state, the transmission spring 104 drives the moving block 103 to move upward to reset, when the moving block 103 moves upward, the L-shaped tooth block 105 moves upward, so that the L-shaped tooth block 105 drives the tooth ring 110 to rotate outward, the inclined surface of the catch 114 contacts the inclined surface of the inclined block 113, and because the elastic coefficient of the transmission spring 104 is five times the elastic coefficient of the auxiliary spring 112, the inclined surface of the catch 114 extrudes the inclined block 113 to move downward, the auxiliary spring 112 is compressed, so that the inclined block 113 is not driven to rotate, preventing the catch 114 from driving the inclined block 113 to rotate when the L-shaped tooth block 105 moves upward to reset, so that the drying plate 108 rotates and resets, so that the drying plate 108 can only be switched between two plates, and the dehumidification effect is not good.

[0028] Although the embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A dust collector for construction work, comprising a box (1), characterized in that: The top of the box (1) is fixed with a suction fan (2), the top of the suction fan (2) is fixed with a dust cover (3), the left side of the box (1) is fixed with a discharge pipe (4), the inner wall of the box (1) is fixed with a filter screen (5), the inside of the box (1) is provided with a heating device for drying dust, the inside of the box (1) is provided with an auxiliary device for intermittent exhaust, the bottom of the heating device is provided with a drying device; Wherein, the heating device comprises motor (71), rotating rod (72), pinion (73), gear (75), heating box (74), heating ring (76) and guide plate (77), the motor (71) is fixed on the top of the box (1), the rotating rod (72) is fixed on the bottom output end of the motor (71), the rotating rod (72) penetrates through the top of the box (1), and the penetrating portion is rotatably connected, the pinion (73) is fixed on the outer wall of the rotating rod (72), the top of the inner wall of the box (1) is rotatably installed with a connecting pipe (6), the top of the connecting pipe (6) is communicated with the bottom output end of the suction fan (2).

2. A dust collector for construction work according to claim 1, characterized in that: The heating box (74) is fixed on the outer wall of the connecting pipe (6), the gear (75) is fixed on the outer wall of the heating box (74), the pinion (73) and the gear (75) are engaged with each other, and the inner wall of the heating box (74) is slidably connected with the heating ring (76).

3. A dust collector for construction work according to claim 2, characterized in that: The guide plate (77) is fixed on the inner wall of the connecting pipe (6).

4. A dust collector for construction work according to claim 3, characterized in that: The auxiliary device comprises T-shaped rod (82), semicircle block (83), connecting spring (84), rotating rod (85), rotating block (86), torsional spring (87), baffle (88), concave-convex plate (81), connecting block (89), fixed block (810) and reset spring (811); the T-shaped rod (82) penetrates through the gear (75), and the penetrating portion is slidably connected, the semicircle block (83) is fixed on the top of the T-shaped rod (82), one side of the connecting spring (84) is fixed on the bottom of the semicircle block (83), and the other side of the connecting spring (84) is fixed on the top of the gear (75).

5. A dust collector for construction work according to claim 4, characterized in that: The bottom of the heating box (74) is fixed with an exhaust hood (9), the exhaust hood (9) is communicated with the heating box (74), the rotating rod (85) penetrates through the heating box (74), and the penetrating portion is rotatably connected, and the baffle (88) is fixed on the outer wall of the rotating rod (85).

6. A dust collector for construction work according to claim 5, characterized in that: The rotating block (86) is fixed on the end point of the rotating rod (85), one side of the torsional spring (87) is fixed on the outer wall of the rotating block (86), the other side of the torsional spring (87) is fixed on the outer wall of the heating box (74), the connecting block (89) is fixed on the bottom of the heating ring (76), the fixed block (810) is fixed on the inner wall of the heating box (74), one side of the reset spring (811) is fixed on the bottom of the heating ring (76), the other side of the reset spring (811) is fixed on the top of the fixed block (810), and the end of the fixed block (810) is slidably connected with the outer wall of the connecting block (89).

7. A dust collector for construction work according to claim 6, characterized in that: The drying device includes an inclined block (101), a return spring (102), a moving block (103), a transmission spring (104), an L-shaped tooth block (105), a rotating shaft (106), a placing frame (107), a drying plate (108), a friction ring (109), a disc (111), an inclined block (113), an auxiliary spring (112), a tooth ring (110), a clamping tooth (114) and a mounting plate (115); the inclined block (101) penetrates the side wall of the exhaust hood (9) and is slidingly connected at the penetration position; one side of the return spring (102) is fixed to the top outer wall of the inclined block (101); the other side of the return spring (102) is fixed to the outer wall of the exhaust hood (9); the moving block (103) slides on the outer wall of the exhaust hood (9); one side of the transmission spring (104) is fixed to the bottom of the moving block (103); the other side of the transmission spring (104) is fixed to the inner side of the outer wall of the exhaust hood (9).

8. A dust collector for construction work according to claim 7, characterized in that: The rotating shaft (106) penetrates the exhaust hood (9) and is rotationally connected at the penetration position; the placing frame (107) is fixed to the outer wall of the rotating shaft (106); the drying plate (108) is attached to the placing frame (107); the mounting plate (115) is detachably installed on the outer wall of the placing frame (107) through bolts; the disc (111) is fixed to the outer wall of the rotating shaft (106); the inclined block (113) is slidingly installed on the inner wall of the disc (111); one side of the auxiliary spring (112) is fixed to the inner wall of the disc (111); the other side of the auxiliary spring (112) is fixed to the bottom of the inclined block (113).

9. A dust collector for construction work according to claim 8, characterized in that: The tooth ring (110) is rotationally installed on the outer wall of the exhaust hood (9); the clamping tooth (114) is fixed in a circumferential array on the inner wall of the tooth ring (110); the friction ring (109) is fixed to the inner wall of the exhaust hood (9); and the inner wall of the friction ring (109) is attached to the inner wall of the rotating shaft (106).

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