Dust hood

Abstract

The invention provides a dust hood, and relates to the technical field of industrial dust removal. The exhaust hood comprises a hood body and an exhaust pipe fixedly installed at the top of the hood body, a lining hood is arranged in the hood body, two positioning rods are welded to each of two outer slopes of the lining hood, the four positioning rods are distributed in a rectangular array, two guide cylinders are welded to each of the two outer slopes of the hood body, and the two guide cylinders are arranged in the lining hood. The four positioning rods penetrate through the corresponding guide cylinders and are in sliding connection with the corresponding guide cylinders, supporting frames are arranged on the two sides of the cover body, winding devices are installed on the supporting frames, two lifting ropes are arranged on each winding device, and the lifting ropes are connected with the corresponding guide cylinders in a sliding mode. The ends, away from the corresponding winding devices, of the four lifting ropes are fixedly connected with the top ends of the corresponding positioning rods. The dust hood has the advantages that the workload and the working frequency of manual frequent cleaning can be effectively reduced, manual cleaning can be completed on the ground, the safety degree is high, and the arranged lining hood is high in installation stability.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial dust removal, and particularly relates to a dust suction hood. Background Art

[0002] Industrial dust suction hoods are important devices used to collect dust-containing air in industrial production environments. They are usually installed on the top of factory buildings and connected to dust removal equipment through exhaust pipes. Under the negative pressure generated by the dust removal equipment, they continuously suck in the dust-containing air in the factory building to achieve the filtration and collection of dust. Since some dust in the dust-containing air will adhere to the inner wall of the dust suction hood due to factors such as humidity and friction, over time, the accumulation of dust will cause a significant increase in air flow resistance, which not only affects the dust suction efficiency, but may also increase the operating load of the dust removal equipment, and even cause equipment failures or affect the air quality of the production environment. Therefore, it is necessary to regularly clean the dust accumulated on the inner wall of the dust suction hood to maintain its normal working performance and the cleanliness of the production environment.

[0003] When the existing dust suction hoods are in use, it is usually necessary for workers to climb to the equipment installation position for cleaning. This not only makes the operation process cumbersome, time-consuming and laborious, but also poses safety hazards for high-altitude operations. Especially for large factory buildings or dust suction hoods installed at high positions, the difficulty and risk of manual cleaning are significantly increased. For stubborn dust with strong adhesion, due to the limited personnel operation and inconvenience in carrying large tools and equipment during high-altitude dust cleaning operations, the cleaning effect is often limited, and it is easy to affect the long-term operation efficiency of the dust suction hood due to incomplete dust cleaning, forming a vicious cycle of high cleaning frequency, high maintenance cost and poor cleaning effect.

[0004] Therefore, it is necessary to provide a dust suction hood to solve the above technical problems. Summary of the Invention

[0005] The technical problem solved by the present invention is to provide a dust suction hood that combines automatic knocking dust cleaning and manual deep cleaning, which can effectively reduce the workload and working frequency of frequent manual cleaning. The manual cleaning can be completed on the ground with high safety, and the installed inner lining hood has high installation stability.

[0006] To solve the above technical problems, the dust suction hood provided by the present invention includes: a hood body and an exhaust pipe fixedly installed on the top of the hood body. An inner lining hood is arranged inside the hood body. Two positioning rods are welded on each of the two outer inclined surfaces of the inner lining hood, and the four positioning rods are distributed in a rectangular array. Two guiding cylinders are welded on each of the two outer inclined surfaces of the hood body. The four positioning rods all penetrate through the corresponding guiding cylinders and are slidably connected to the corresponding guiding cylinders. Support frames are arranged on both sides of the hood body, a hoisting device is installed on the support frames, and two lifting ropes are arranged on the hoisting device. One end of each of the four lifting ropes far from the corresponding hoisting device is fixedly connected to the top end of the corresponding positioning rod; On one side where the two support frames are close to each other, pulley guiding mechanisms for changing the direction of the suspension ropes are also fixedly installed, and both pulley guiding mechanisms are fixedly connected to the cover body; A mobile knocking mechanism for vibrating and cleaning the inner wall of the inner liner cover is also arranged on the outer inclined surface of the cover body.

[0007] Preferably, any one of the pulley guiding mechanisms includes two mounting plates, a fixed shaft, and two guiding pulleys. The fixed shaft is fixedly installed on the two mounting plates, and the two guiding pulleys are both rotatably sleeved on the fixed shaft. All four suspension ropes are located in the corresponding pulley grooves of the guiding pulleys, and the mounting plates are fixedly connected to the cover body.

[0008] Preferably, four fixing boxes adapted to the mounting plates are fixedly installed on the top of the cover body. The bottom ends of the four mounting plates all extend into the corresponding fixing boxes. Two limiting screws are threadedly installed on the outer wall of the fixing box away from the cover body. A pin rod is integrally formed at one end of the limiting screw close to the cover body. Two first insertion holes are formed in the mounting plate. Both pin rods penetrate through the corresponding first insertion holes and are slidably connected to the inner walls of the corresponding first insertion holes.

[0009] Preferably, the guiding cylinder includes a bottom pipe, a conical guiding pipe, and a top pipe. The bottom pipe is fixedly welded to the cover body. The conical guiding pipe is arranged at the top end of the bottom pipe. The top pipe is arranged at the top end of the conical guiding pipe. The bottom pipe, the conical guiding pipe, and the top pipe are integrally formed. The inner diameter of the top pipe is smaller than the inner diameter of the bottom pipe.

[0010] Preferably, the mobile knocking mechanism includes a long groove box, a long screw rod, a first motor, a sliding support block, a fixed rod, a swing arm, a knocking block, a torsion spring, a second motor and a cam. The long groove box is fixedly installed on the inclined surface of the corresponding cover body. The long screw rod is rotatably installed in the long groove box, and both ends of the long screw rod extend outside the long groove box. The sliding support block is slidably installed in the long groove box. The long screw rod penetrates through the sliding support block and is threadedly connected with the sliding support block. The first motor is fixedly installed at the bottom end of the long groove box, and the output end of the first motor is fixedly connected with one end of the corresponding long screw rod. The second motor is fixedly installed on the top of the sliding support block. The cam is fixedly sleeved on the output end of the second motor. The fixed rod is fixedly installed on the outer wall of the sliding support block close to the first motor. The swing arm is rotatably sleeved on the fixed rod. The knocking block is fixedly installed at the bottom end of the swing arm. A receiving block is integrally formed at the top end of the swing arm. The cam is in contact with the receiving block. The torsion spring is sleeved on the fixed rod. One end of the torsion spring is fixedly connected with the sliding support block, and the other end is fixedly connected with the swing arm.

[0011] Preferably, the joints between the end faces and the outer peripheral walls at both ends of the knocking block are chamfered.

[0012] Preferably, two limiting slots are formed on the outer wall of the positioning rod. A limiting plate is penetrated and slidably installed on the mounting plate. Two limiting plugs adapted to the limiting slots are integrally formed at one end of the limiting plate close to the cover body. The two limiting plugs are respectively located in the two limiting slots. A square tube adapted to the limiting plate is fixedly installed on the outer wall of the mounting plate away from the cover body. The limiting plate penetrates through the square tube and is slidably connected with the inner wall of the square tube. A second jack is formed in the limiting plate. A locking mechanism for locking the limiting plate in cooperation with the second jack is installed at the top of the square tube.

[0013] Preferably, the locking mechanism includes a C-shaped member, a locking plug, a sleeve piece, a spring and a circular top plate. The C-shaped member is fixedly installed at the top of the square tube. The locking plug is penetrated and slidably installed on the C-shaped member. The bottom end of the locking plug extends into the second jack. The sleeve piece is fixedly sleeved on the outer wall of the locking plug. The circular top plate is fixedly installed at the top end of the locking plug. The spring is sleeved on the locking plug. The top end of the spring is fixedly connected with the inner wall of the top of the C-shaped member, and the bottom end is fixedly connected with the sleeve piece.

[0014] Preferably, a strip-shaped limiting groove is formed at the top of the limiting plate, and the strip-shaped limiting groove communicates with the second jack. A limiting contact rod is fixedly installed at the top of the sleeve piece.

[0015] Preferably, the end face of the limiting plug near one end of the cover body and the joints of the adjacent four side outer walls are all chamfered.

[0016] Compared with the related art, the dust suction hood provided by the present invention has the following beneficial effects: The present invention provides a dust suction hood. By arranging a lining hood inside the hood body to replace the direct contact between the hood body and dust, it is convenient to clean the accumulated dust subsequently and can reduce the loss of the hood body. Combining the settings of the hoisting device and the mobile knocking mechanism, usually the mobile knocking mechanism can be started. With the cooperation of components such as the long lead screw and the cam, the knocking block reciprocally knocks along the outer inclined surface of the hood body, and the generated vibration can timely shake off the dust on the inner wall of the lining hood, effectively maintaining the smooth air flow during the dust suction process and reducing the problem of the reduction of the dust suction efficiency caused by dust accumulation. When it has been used for a certain period of time, the stubborn dust with strong adhesion is difficult to be removed by knocking. At this time, the hoisting device can be used to retract and release the suspension rope to smoothly lower the lining hood to a low position, so that the staff does not need to climb to a high place for dust cleaning operation and can comprehensively and carefully manually clean the inner wall of the lining hood on the ground. This design of combining daily automatic knocking dust cleaning with regular manual deep cleaning not only greatly reduces the workload and working frequency of frequent manual cleaning, reduces the labor cost, but also avoids the risk of high-altitude operation through low-position cleaning, ensures the safety of personnel. At the same time, the daily automatic dust cleaning can delay the formation of stubborn dust accumulation and extend the manual cleaning cycle, while the manual deep cleaning can thoroughly remove the dust that is difficult to handle by automatic dust cleaning, which can not only keep the dust suction hood running efficiently for a long time, but also significantly improve the economy and safety of the overall cleaning and maintenance; By opening a limiting slot on the positioning rod and combining with the arrangement of a limiting plate with a limiting plug on the mounting plate, after the limiting plug is inserted into the limiting slot, it can form a rigid support and limit for the positioning rod in the vertical direction, which is beneficial to enhancing the impact resistance and vibration resistance of the lining hood. At the same time, it shares the load of the suspension rope, which is beneficial to extending the service life of the suspension rope and improving the stability and safety of the lining hood. Through the arrangement of the locking mechanism composed of components such as the C-shaped part, the locking plug rod, the sleeve piece, and the spring, the function of quickly locking and unlocking the limiting plate is realized, which has the advantages of convenient operation and reliable locking. By opening a strip-shaped limiting slot at the top of the limiting plate and arranging a limiting contact rod on the sleeve piece, the function that the limiting plate can only move limitedly and cannot be completely pulled out of the square tube after unlocking is realized, which has the advantage of preventing the loss of the limiting plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the first embodiment of the dust suction hood provided by the present invention; Figure 2 is Figure 1 the top view of the shown dust suction hood; Figure 3 is Figure 1Schematic diagram of the assembly of the mounting plate and the fixing box shown; Figure 4 is Figure 1 Schematic diagram of the state with the inner lining cover placed under the dust suction hood shown; Figure 5 is Figure 1 Schematic diagram of the structure of the guide tube shown; Figure 6 is Figure 1 Schematic diagram of the structure of the cover body shown; Figure 7 is Figure 1 Schematic diagram of the structure of the mobile knocking mechanism shown; Figure 8 is Figure 7 Schematic diagram of a partial structure shown; Figure 9 Schematic diagram of the structure of the second embodiment of the dust suction hood provided by the present invention; Figure 10 is Figure 9 Enlarged view of part A shown; Figure 11 is Figure 9 Schematic diagram of the assembly of the positioning rod and the limiting plate shown; Figure 12 is Figure 11 Schematic diagram of the structure of the locking mechanism shown; Figure 13 is Figure 11 Schematic diagram of the structure of the limiting plate shown.

[0018] In the figure: 1. Cover body; 2. Exhaust pipe; 3. Inner lining cover; 4. Positioning rod; 401. Limiting slot; 5. Guide tube; 6. Support frame; 7. Hoisting device; 8. Suspension rope; 9. Mounting plate; 901. First jack; 10. Fixed shaft; 11. Guide pulley; 12. Fixing box; 13. Limiting screw; 14. Long groove box; 15. Long lead screw; 16. First motor; 17. Sliding support block; 18. Fixed rod; 19. Swing arm; 191. Resisting block; 20. Knocking block; 21. Torsion spring; 22. Second motor; 23. Cam; 24. Square tube; 25. Limiting plate; 251. Limiting plug; 2501. Second jack; 26. Square end plate; 27. C-shaped member; 28. Locking plug; 29. Sleeve piece; 30. Spring; 31. Circular top plate; 32. Limit contact rod. Detailed implementation manners

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] The First Embodiment Please refer to Figures 1 - 8 , in the first embodiment of the present invention, the dust suction hood includes: a hood body 1 and an exhaust pipe 2 fixedly installed on the top of the hood body 1. Reinforcing ribs are welded on the four outer inclined surfaces of the hood body 1. A lining hood 3 is arranged inside the hood body 1. The four outer inclined surfaces of the lining hood 3 are respectively attached to the four inner inclined surfaces of the hood body 1. The lining hood 3 contacts the dust directly instead of the hood body 1. Two positioning rods 4 are welded on each of the two outer inclined surfaces of the lining hood 3. The four positioning rods 4 are arranged in a rectangular array. Two guiding cylinders 5 are welded on each of the two outer inclined surfaces of the hood body 1. The four positioning rods 4 all penetrate through the corresponding guiding cylinders 5 and are slidably connected with the corresponding guiding cylinders 5. The guiding cylinder 5 includes a bottom pipe, a conical guiding pipe and a top pipe. The bottom pipe is welded and fixed on the hood body 1. The conical guiding pipe is arranged at the top end of the bottom pipe. The top pipe is arranged at the top end of the conical guiding pipe. The bottom pipe, the conical guiding pipe and the top pipe are integrally formed. The inner diameter of the top pipe is smaller than that of the bottom pipe. Four through holes are formed in the hood body 1. The four through holes are respectively communicated with the bottom pipes of the four guiding cylinders 5. During the ascending process of the lining hood 3, since the diameter of the positioning rod 4 is small, it can easily enter the bottom pipe through the through hole, and then enter the top pipe under the guiding action of the conical guiding pipe. The inner diameter of the top pipe is the same as the diameter of the positioning rod 4, so that the lining hood 3 can be forced to be centered and its horizontal position can be accurately found. Support frames 6 are arranged on both sides of the hood body 1. A hoisting device 7 is installed on the support frame 6. Two suspension ropes 8 are arranged on the hoisting device 7. The suspension ropes 8 are steel wire suspension ropes. One ends of the four suspension ropes 8 far away from the corresponding hoisting devices 7 are fixedly connected to the top ends of the corresponding positioning rods 4. The structure of the hoisting device 7 adopts the conventional design of an electric hoist in the prior art; In this embodiment, in order to change the direction of the lifting rope 8 and convert the horizontal pulling force of the hoisting device 7 into a vertical lifting force, pulley guiding mechanisms for changing the direction of the lifting rope 8 are fixedly installed on the sides of the two support frames 6 close to each other. Moreover, the two pulley guiding mechanisms are both fixedly connected to the housing 1. More specifically, any one of the pulley guiding mechanisms includes two mounting plates 9, a fixed shaft 10, and two guiding pulleys 11. A trapezoidal frame is fixedly installed on the two mounting plates 9 by bolts. On the sides of the two trapezoidal frames away from the mounting plates 9, they are both fixedly installed on the support frame 6 by bolts. The fixed shaft 10 is fixedly installed on the two mounting plates 9. The two guiding pulleys 11 are both rotatably sleeved on the fixed shaft 10. All four lifting ropes 8 are located in the groove of the corresponding guiding pulley 11. In order to achieve reliable support for the pulley guiding mechanism, the mounting plate 9 is fixedly connected to the housing 1; In this embodiment, in order to automatically clean the dust adhering to the inner wall of the inner lining cover 3 without lowering the inner lining cover 3, a mobile knocking mechanism for vibrating and cleaning the inner wall of the inner lining cover 3 is further provided on the outer inclined surface of the housing 1. In this embodiment, there are two groups of mobile knocking mechanisms, which are respectively fixedly installed on the outer inclined surfaces on the left and right sides of the housing 1. In some other embodiments, there can also be four groups of mobile knocking mechanisms, which are respectively fixedly installed on the four outer inclined surfaces of the housing 1.

[0021] In this embodiment, in order to facilitate the fixed connection between the mounting plate 9 and the housing 1, four fixed boxes 12 adapted to the mounting plate 9 are fixedly installed on the top of the housing 1. The bottom ends of the four mounting plates 9 all extend into the corresponding fixed boxes 12. Two internal thread cylinders are fixedly installed on the outer wall of the fixed box 12 away from the housing 1. Two limiting screws 13 are respectively threadedly installed in the two internal thread cylinders. A pin rod is integrally formed at one end of the limiting screw 13 close to the housing 1. Two first jacks 901 are opened on the mounting plate 9. The two pin rods both penetrate through the corresponding first jacks 901 and are slidably connected to the inner walls of the corresponding first jacks 901. After the mounting plate 9 is inserted into the fixed box 12 and in place, the two first jacks 901 will be axially aligned with the two internal thread cylinders respectively. Then, the pin rod on the limiting screw 13 is inserted into the internal thread cylinder, and then the limiting screw 13 is screwed clockwise into the internal thread cylinder. During the clockwise rotation of the limiting screw 13, it will move forward, so that the pin rod penetrates through the first jack 901.

[0022] In this embodiment, the mobile knocking mechanism specifically includes a long groove box 14, a long lead screw 15, a first motor 16, a sliding support block 17, a fixed rod 18, a swing arm 19, a knocking block 20, a torsion spring 21, a second motor 22 and a cam 23. The long groove box 14 is fixedly installed on the reinforcing rib on the inclined surface of the corresponding cover 1 to ensure the support strength. The long lead screw 15 is rotatably installed in the long groove box 14, and both ends of the long lead screw 15 extend outside the long groove box 14. The sliding support block 17 is slidably installed in the long groove box 14. The long lead screw 15 passes through the sliding support block 17 and is threadedly connected to the sliding support block 17. The first motor 16 is fixedly installed at the bottom end of the long groove box 14, and the output end of the first motor 16 is fixedly connected to one end of the corresponding long lead screw 15. The second motor 22 is fixedly installed on the top of the sliding support block 17, and the cam 23 is fixedly sleeved on the output end of the second motor 22. The fixed rod 18 is fixedly installed on the outer wall of the sliding support block 17 close to the first motor 16. The swing arm 19 is rotatably sleeved on the fixed rod 18. The knocking block 20 is fixedly installed at the bottom end of the swing arm 19. A receiving block 191 is integrally formed at the top end of the swing arm 19. The cam 23 is in contact with the receiving block 191. The torsion spring 21 is sleeved on the fixed rod 18. One end of the torsion spring 21 is fixedly connected to the sliding support block 17, and the other end is fixedly connected to the swing arm 19. Refer to Figure 8 , during the clockwise rotation of the protruding part of the cam 23, it will contact the receiving block 191 and drive it to rotate counterclockwise. The swing arm 19 follows the rotation of the receiving block 191, so that the knocking block 20 can be lifted, and the torsion spring 21 will be tightened. After the cam 23 rotates a certain angle, it will separate from the receiving block 191. Under the action of the torsion spring 21, the receiving block 191 makes a reset movement, so that the knocking block 20 knocks on the cover 1, and the vibration generated by the knocking is transmitted to the inner lining cover 3, so that most of the dust attached to the inner wall of the inner lining cover 3 can be shaken off.

[0023] In this embodiment, in order to prevent the knocking block 20 from contacting the reinforcing rib on the cover 1 during the movement, the connection between the end faces of both ends of the knocking block 20 and the outer peripheral wall is designed with chamfers.

[0024] In this embodiment: During use, the cover 1 is fixedly installed on the top of the factory building, and the two support frames 6 are respectively fixedly installed on both sides of the cover 1. After both are fixed, then install the pulley guiding mechanism. When installing, first fix the two mounting plates 9 in the corresponding two fixed boxes 12, and then fix the trapezoidal frame between the mounting plate 9 and the support frame 6 with bolts. In this way, the support frame 6 can share part of the pressure of the pulley guiding mechanism borne by the cover 1; The exhaust pipe 2 is connected to the intake end of the dust removal device. When the dust removal device is operating, a negative pressure is formed inside itself, and the dust-containing air in the workshop will be continuously sucked away and enter the dust removal device through the hood 1 and the exhaust pipe 2. Part of the dust will remain on the inner wall of the inner lining hood 3 due to humidity, friction, etc. Excessive accumulation of dust will cause too much air flow resistance, which will in turn affect the dust suction efficiency. By regularly starting the two groups of mobile knocking mechanisms for knocking, part of the dust on the inner wall of the inner lining hood 3 can be shaken off, so that the air flow smoothness can be maintained for a long time. Specifically, when the first motor 16 operates, it can drive the long lead screw 15 to rotate forward or backward. During the rotation of the long lead screw 15, the sliding support block 17 is driven to move upward or downward. When the second motor 22 operates, it will drive the cam 23 to rotate. During the rotation of the protruding part of the cam 23, it will first contact the receiving block 191, causing the receiving block 191 to rotate counterclockwise, and the swing arm 19 follows the receiving block 191 to move, causing the knocking block 20 to be lifted. During the above process, the torsion spring 21 will be tightened. When the cam 23 rotates a certain angle, it will separate from the receiving block 191. After losing the restraint, the torsion of the torsion spring 21 will be instantly released, driving the swing arm 19 to perform a clockwise reset movement. The knocking block 20 on the swing arm 19 will impact the hood 1, and the vibration formed by the impact is transmitted to the inner lining hood 3, so that part of the dust attached to the inner wall of the inner lining hood 3 can be shaken off. After the sliding support block 17 moves from top to bottom under the drive of the long lead screw 15, the knocking block 20 completes the knocking process of the hood 1 from top to bottom. After that, the first motor 16 drives the long lead screw 15 to reverse, so that the knocking block 20 can knock on the hood 1 from bottom to top, which has the advantage of a wide coverage area. Repeating this cycle several times can achieve a good dust cleaning effect; Some dust with strong adhesion cannot be shaken off by knocking and vibration. After a certain number of times of knocking and dust cleaning, it is necessary to manually clean the inner wall of the inner lining cover 3. In this case, start the operation of two sets of hoisting devices 7 at the same time to release the lifting ropes 8. Under the action of gravity, the inner lining cover 3 will gradually move downward as the lifting ropes 8 are released. Eventually, the inner lining cover 3 can be lowered to a lower position, enabling relevant personnel to clean the inner wall of the inner lining cover 3 on the ground. Firstly, it avoids relevant personnel climbing to high places for dust cleaning operations, and secondly, it is more convenient; after the cleaning is completed, start the operation of two sets of hoisting devices 7 to wind up the lifting ropes 8. As the lifting ropes 8 are continuously wound up, the inner lining cover 3 will gradually rise. After the inner lining cover 3 enters the cover body 1, the four positioning rods 4 will enter the corresponding guiding cylinders 5. Under the guiding action of the conical guiding pipes on the guiding cylinders 5, the positioning rods 4 enter the top pipes. In this way, the horizontal positions of the four positioning rods 4 can be accurately found. When the horizontal positions of the four positioning rods 4 are accurately found, the horizontal position of the inner lining cover 3 is also accurately found accordingly. The hoisting device 7 continues to operate, and the inner lining cover 3 continues to rise. Eventually, the four outer inclined surfaces of the inner lining cover 3 will respectively fit with the four inner inclined surfaces of the cover body 1. In this way, the inner lining cover 3 is installed in place, and then the hoisting device 7 can be shut down.

[0025] Compared with the related technology, the dust suction hood provided by the present invention has the following beneficial effects: By arranging the inner lining cover 3 in the cover body 1 to replace the direct contact between the cover body 1 and the dust, it is convenient for subsequent cleaning of the accumulated dust and can reduce the loss of the cover body 1. Combining the setting of the hoisting device 7 and the mobile knocking mechanism, usually, the mobile knocking mechanism can be started, and with the cooperation of components such as the long lead screw 15 and the cam 23, the knocking block 20 reciprocally knocks along the outer inclined surface of the cover body 1, and the generated vibration can timely shake off the dust on the inner wall of the inner lining cover 3, effectively maintaining the smooth air flow during the dust suction process and reducing the problem of the dust suction efficiency decline caused by dust accumulation; when it is used for a certain period of time, stubborn dust with strong adhesion is difficult to be removed by knocking. At this time, the hoisting device 7 can be used to wind and unwind the lifting ropes 8 to smoothly lower the inner lining cover 3 to a low position, so that the staff does not need to climb to high places for dust cleaning operations and can comprehensively and carefully manually clean the inner wall of the inner lining cover 3 on the ground. This design of combining daily automatic knocking and dust cleaning with regular manual deep cleaning not only greatly reduces the workload and working frequency of frequent manual cleaning, reduces the labor cost, but also avoids the risk of high-altitude operations through low-position cleaning, ensures the safety of personnel. At the same time, daily automatic dust cleaning can delay the formation of stubborn dust accumulation and extend the manual cleaning cycle, while manual deep cleaning can thoroughly remove the dust that is difficult to handle by automatic dust cleaning, which can not only keep the dust suction hood running efficiently for a long time, but also significantly improve the economy and safety of the overall cleaning and maintenance.

[0026] Second Embodiment: Based on the dust suction hood provided in the first embodiment of the present application, another dust suction hood is proposed in the second embodiment of the present application. The second embodiment is merely a preferred manner of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0027] The following further describes the second embodiment of the present invention in conjunction with the drawings and embodiments.

[0028] Please refer to Figures 9 - 13 , in the dust suction hood proposed in this embodiment, two limiting slots 401 are further opened on the outer wall of the positioning rod 4. A limiting plate 25 is installed through and slidably on the mounting plate 9. At one end of the limiting plate 25 close to the hood body 1, two limiting plugs 251 adapted to the limiting slots 401 are integrally formed. The two limiting plugs 251 are respectively located in the two limiting slots 401. The end face of the limiting plug 251 at the end close to the hood body 1 is chamfered at the connection with the outer walls of the adjacent four sides, so that the limiting plug 251 can be inserted into the limiting slot 401 more smoothly. A square tube 24 adapted to the limiting plate 25 is fixedly installed on the outer wall of the mounting plate 9 away from the hood body 1. The limiting plate 25 passes through the square tube 24 and is slidably connected to the inner wall of the square tube 24. A second jack 2501 is opened in the limiting plate 25. The limiting plate 25 forms a rigid support for the positioning rod 4, restricts the displacement of the inner lining hood 3 in the horizontal and vertical directions, significantly improves the impact resistance and vibration resistance of the inner lining hood 3, prevents the inner lining hood 3 from loosening due to external forces, and also shares the load of the suspension rope 8, which is beneficial to extending the service life of the suspension rope 8. A locking mechanism for locking the limiting plate 25 in cooperation with the second jack 2501 is installed at the top of the square tube 24; Specifically, the locking mechanism includes a C-shaped member 27, a locking plug 28, a sleeve 29, a spring 30, and a circular top plate 31. The C-shaped member 27 is fixedly installed at the top of the square tube 24. The locking plug 28 is installed through and slidably on the C-shaped member 27. The bottom end of the locking plug 28 extends into the second jack 2501. The sleeve 29 is fixedly sleeved on the outer wall of the locking plug 28. The circular top plate 31 is fixedly installed at the top of the locking plug 28. A pull ring is welded and fixed to the top of the circular top plate 31. The locking plug 28 can be lifted upward through the pull ring. The spring 30 is sleeved on the locking plug 28. The top end of the spring 30 is fixedly connected to the inner wall of the top of the C-shaped member 27, and the bottom end is fixedly connected to the sleeve 29.

[0029] In this embodiment, to prevent the limiting plate 25 from detaching from the square tube 24, a strip-shaped limiting groove is formed at the top of the limiting plate 25, and the strip-shaped limiting groove communicates with the second jack 2501. A limiting contact rod 32 is fixedly installed at the top of the sleeve piece 29. During the process of lifting the locking plug rod 28 upward, when the limiting contact rod 32 abuts against the inner bottom wall of the C-shaped member 27, it cannot rise further. At this time, the bottom end of the locking plug rod 28 is located within the strip-shaped limiting groove and does not protrude above the top surface of the limiting plate 25. This enables the limiting plate 25 to be pulled backward only for a certain distance and cannot be completely withdrawn from the C-shaped member 27, preventing the loss of the limiting plate 25. Additionally, after pulling the limiting plate 25 away from the positioning rod 4, when the locking plug rod 28 is released, the bottom end of the locking plug rod 28 will abut against the inner bottom wall of the limiting plate 25 under the elastic force of the spring 30, avoiding the situation where the large displacement of the limiting plate 25 due to mechanical vibration blocks the upward movement of the positioning rod 4.

[0030] In this embodiment: After the inner lining cover 3 is lifted by the hoisting device 7, the four positioning rods 4 will also reach the predetermined height. Thereafter, the locking plug rod 28 is lifted upward through the pull ring, causing the bottom end of the locking plug rod 28 to separate from the inner bottom wall of the strip-shaped limiting groove. Then, the limiting plate 25 is pushed forward until the square end plate 26 contacts the square tube 24. During this process, the two limiting plugs 251 on the limiting plate 25 will respectively insert into the two limiting slots 401 on the corresponding positioning rod 4, imposing a vertical restriction on the positioning rod 4. After the square end plate 26 contacts the square tube 24, the locking plug rod 28 and the second jack 2501 will also be axially aligned. When the pull ring is released, under the elastic force of the spring 30, the bottom end of the locking plug rod 28 will enter the second jack 2501 to lock the limiting plate 25, enabling the limiting plate 25 to reliably limit the positioning rod 4; By forming the limiting slots 401 on the positioning rod 4 and combining with the limiting plate 25 provided with the limiting plugs 251 on the mounting plate 9, after inserting the limiting plugs 251 into the limiting slots 401, a rigid support and limitation can be formed for the positioning rod 4 in the vertical direction, which is beneficial to enhancing the impact resistance and vibration resistance of the inner lining cover 3. At the same time, it shares the load of the lifting rope 8, which is beneficial to extending the service life of the lifting rope 8 and improving the stability and safety of the inner lining cover 3. Through the setting of the locking mechanism composed of components such as the C-shaped member 27, the locking plug rod 28, the sleeve piece 29, and the spring 30, the functions of quickly locking and unlocking the limiting plate 25 are realized, with the advantages of convenient operation and reliable locking. By forming a strip-shaped limiting groove at the top of the limiting plate 25 and setting the limiting contact rod 32 on the sleeve piece 29, the function that the limiting plate 25 can only move limitedly after unlocking and cannot be completely withdrawn from the square tube 24 is realized, with the advantage of preventing the loss of the limiting plate 25.

[0031] The above are only embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present invention.

Claims

1. A dust suction hood, comprising a hood body and an exhaust pipe fixedly installed at the top of the hood body, characterized in that, A lining cover is arranged inside the cover body. Two positioning rods are welded on each of the two outer inclined surfaces of the lining cover. The four positioning rods are distributed in a rectangular array. Two guiding cylinders are welded on each of the two outer inclined surfaces of the cover body. Each of the four positioning rods passes through the corresponding guiding cylinder and is slidably connected with the corresponding guiding cylinder. Support frames are arranged on both sides of the cover body. A hoisting device is installed on the support frame. Two lifting ropes are arranged on the hoisting device. One end of each of the four lifting ropes, which is far away from the corresponding hoisting device, is fixedly connected with the top end of the corresponding positioning rod; On one side of the two support frames close to each other, a pulley guiding mechanism for changing the direction of the lifting ropes is fixedly installed, and both pulley guiding mechanisms are fixedly connected with the cover body; A movable knocking mechanism for vibrating and cleaning the inner wall of the lining cover is also arranged on the outer inclined surface of the cover body.

2. The dust suction hood according to claim 1, characterized in that, Any one of the pulley guiding mechanisms includes two mounting plates, a fixed shaft and two guiding pulleys. The fixed shaft is fixedly installed on the two mounting plates. The two guiding pulleys are rotatably sleeved on the fixed shaft. The four lifting ropes are all located in the groove of the corresponding guiding pulley. The mounting plate is fixedly connected with the cover body.

3. The dust suction hood according to claim 2, characterized in that, Four fixing boxes adapted to the mounting plates are fixedly installed on the top of the cover body. The bottom ends of the four mounting plates all extend into the corresponding fixing boxes. Two limiting screws are threadedly installed on the outer wall of one side of the fixing box away from the cover body. A pin rod is integrally formed at one end of the limiting screw close to the cover body. Two first insertion holes are formed in the mounting plate. The two pin rods both pass through the corresponding first insertion holes and are slidably connected with the inner wall of the corresponding first insertion hole.

4. The dust suction hood according to claim 1, wherein, The guiding cylinder includes a bottom pipe, a conical guiding pipe and a top pipe. The bottom pipe is welded and fixed on the cover body. The conical guiding pipe is arranged at the top end of the bottom pipe. The top pipe is arranged at the top end of the conical guiding pipe. The bottom pipe, the conical guiding pipe and the top pipe are integrally formed. The inner diameter of the top pipe is smaller than that of the bottom pipe.

5. The suction hood according to claim 1, characterized in that, The mobile knocking mechanism includes a long groove box, a long lead screw, a first motor, a sliding support block, a fixed rod, a swing arm, a knocking block, a torsion spring, a second motor and a cam. The long groove box is fixedly installed on the inclined surface of the corresponding cover body. The long lead screw is rotatably installed in the long groove box, and both ends of the long lead screw extend outside the long groove box. The sliding support block is slidably installed in the long groove box. The long lead screw penetrates through the sliding support block and is threadedly connected to the sliding support block. The first motor is fixedly installed at the bottom end of the long groove box, and the output end of the first motor is fixedly connected to one end of the corresponding long lead screw. The second motor is fixedly installed on the top of the sliding support block. The cam is fixedly sleeved on the output end of the second motor. The fixed rod is fixedly installed on the outer wall of the sliding support block close to the first motor. The swing arm is rotatably sleeved on the fixed rod. The knocking block is fixedly installed at the bottom end of the swing arm. A receiving block is integrally formed at the top end of the swing arm. The cam contacts the receiving block. The torsion spring is sleeved on the fixed rod. One end of the torsion spring is fixedly connected to the sliding support block, and the other end is fixedly connected to the swing arm.

6. The dust suction hood according to claim 5, wherein, The joints between the end faces and the outer peripheral walls at both ends of the knocking block are chamfered.

7. The dust suction hood according to claim 2, wherein, Two limiting slots are formed in the outer wall of the positioning rod. A limiting plate is installed through and slidably in the mounting plate. Two limiting plugs adapted to the limiting slots are integrally formed at one end of the limiting plate close to the cover body. The two limiting plugs are respectively located in the two limiting slots. A square tube adapted to the limiting plate is fixedly installed on the outer wall of the mounting plate away from the cover body. The limiting plate penetrates through the square tube and is slidably connected to the inner wall of the square tube. A second jack is formed in the limiting plate. A locking mechanism for locking the limiting plate in cooperation with the second jack is installed at the top of the square tube.

8. The dust suction hood according to claim 7, characterized in that, The locking mechanism includes a C-shaped member, a locking plug, a sleeve piece, a spring and a circular top plate. The C-shaped member is fixedly installed at the top of the square tube. The locking plug is installed through and slidably on the C-shaped member. The bottom end of the locking plug extends into the second jack. The sleeve piece is fixedly sleeved on the outer wall of the locking plug. The circular top plate is fixedly installed at the top end of the locking plug. The spring is sleeved on the locking plug. The top end of the spring is fixedly connected to the inner wall of the top of the C-shaped member, and the bottom end is fixedly connected to the sleeve piece.

9. The suction hood according to claim 8, characterized in that, A strip-shaped limiting groove is formed at the top of the limiting plate, and the strip-shaped limiting groove communicates with the second jack. A limiting contact rod is fixedly installed at the top of the sleeve piece.

10. The suction hood according to claim 8, characterized in that, The joints between the end face at one end of the limiting plug close to the cover body and the adjacent four outer walls are chamfered.

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