Dust removal equipment for concrete production

Abstract

The invention belongs to the technical field of concrete production, and discloses dust removal equipment for concrete production, which comprises a shell, a middle ring and a mounting frame. According to the raw material stirring device disclosed by the invention, the raw materials in the shell are scattered and attached to the wet screen plate along with stirring of the raw materials, the raw materials enter the range of the fan interface along with the mounting cylinder corresponding to the screen plate, and the suction force generated by the fan attracts the screen plate and lifts the screen plate upwards; at the moment, after the side edge of the screen plate enters the part where the vent groove is located, the fan does not attract the screen plate any more, and under the action of a reset spring, a sliding column collides with a limiting frame, so that wet particles and powder in the screen plate are vibrated to fall into the concrete in stirring; by means of the arrangement, the stirring device can capture scattered particles and powder generated in the stirring process, and dust falling of a production workshop is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete production, and in particular relates to dust removal equipment used in concrete production. Background Art

[0002] Concrete is a composite material composed of multiple materials, which is mainly composed of cement, coarse aggregate, fine aggregate, admixture, admixture and water. Cement, fine aggregate, admixture and admixture are all small particles or powdered substances. This makes these substances fly up from bottom to top as the stirring of the stirring rod during the concrete production process. At the same time, because coarse aggregate, cement, fine aggregate, admixture and admixture are added to the concrete in sequence during the feeding process, and finally water is injected into the mixer for stirring, which makes the admixture and admixture at the top most likely to fly outward due to the stirring of the stirring rod. The existing mixing equipment will connect a fan to the outer shell to extract these scattered particles and powder raw materials to achieve dust removal and dust reduction, resulting in the actual amount of admixtures and admixtures being less than the added amount, and as the raw materials are turned over, the cement at the bottom will also be turned up and scattered outward, resulting in the actual content of cement being less than the added amount. Both of these problems are likely to cause the actual performance of concrete to be lower than the calculated performance, making concrete unable to be used in the target project, resulting in a waste of resources. Summary of the invention

[0003] The object of the present invention is to provide a dust removal device for concrete production to solve the problems raised in the above background technology.

[0004] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a dust removal device for concrete production, comprising a base and a shell fixed thereon, the top of the shell is in a truncated cone shape, and a feed port is provided on its side, a cover plate is hingedly connected to the side of the shell, a fan interface is fixedly connected to the outer side of the cover plate, and the fan interface is communicated with the feed port, a rotating shaft is rotatably installed inside the shell, an upper plate is rotatably installed on the side of the rotating shaft, the top surface of the upper plate is fixedly connected to the inner top surface of the shell, the bottom surface of the upper plate is fixedly connected to the lower plate through a connecting rod, and the bottom surface of the upper plate and The top surface of the lower plate is fixedly connected with needle bearings, and a middle ring is abutted between two of the needle bearings. The outer side surface of the middle ring is fixedly connected with a plurality of centrally symmetrical mounting frames and fixing frames. The interior of the mounting frame is fixedly sleeved with a mounting tube, and the inner side surface of the mounting tube is provided with a plurality of ventilation grooves. A mesh plate is slidably connected inside the mounting tube, and the top surface of the mounting tube is fixedly connected with a limiting frame, and the center sliding sleeve of the limiting frame is connected with a sliding column, and the bottom end of the sliding column is fixedly connected to the center of the mesh plate, a return spring is movably sleeved on the sliding column, and a membrane is fixedly sleeved on the outer side surface of the mounting tube.

[0005] Preferably, the mounting frame and the fixing frame are arranged at intervals, a scraper is fixedly connected to the side of the fixing frame, and the scraper is tangent to the inner side surface of the frustum-shaped top of the outer shell.

[0006] Preferably, the inner diameter of the mounting cylinder is less than or equal to the diameter of the feed port opened on the outer shell, the inner diameter of the membrane is larger than the diameter of the feed port, and the membrane is elastic.

[0007] Preferably, the length of the ventilation groove is smaller than the height of the mounting tube, and the plurality of ventilation grooves are centrally symmetrically arranged about the central axis of the sliding column.

[0008] Preferably, a gear ring is fixedly sleeved on the inner side surface of the middle ring, a first gear is fixedly sleeved on the side surface of the rotating shaft, a rotating column is rotatably installed inside the upper plate, and a second gear and a third gear are fixedly sleeved on the side surface of the rotating column.

[0009] Preferably, the first gear is meshed with the second gear, and the third gear is meshed with the ring gear.

[0010] Preferably, the diameter of the first gear is greater than the diameter of the second gear, the first gear is a gear with partial teeth, and the number of teeth is equal to the number of teeth of the second gear.

[0011] Preferably, a water sprinkling port is fixedly connected to the outer side surface of the truncated cone-shaped top of the shell, and the water sprinkling port and the feed port correspond to a mounting tube respectively.

[0012] Preferably, the ends of the mounting frame and the fixing frame away from the middle ring are both fixedly connected to a connecting ring, and the center of the connecting ring coincides with the axis of the rotating shaft.

[0013] Preferably, a plurality of connection plates are fixedly sleeved on the side of the rotating shaft, a plurality of stirring rods with different distances from the rotating shaft are fixedly connected to the outer side of the connection plate, and a discharge port is fixedly provided on the bottom side of the shell.

[0014] The beneficial effects of the present invention are as follows:

[0015] 1. In the present invention, as the rotating shaft rotates to drive the stirring rod to stir the raw materials, the raw materials in the shell will fly with the movement of the stirring rod. After these raw materials are scattered and attached to the wet mesh plate, as the mounting tube corresponding to the mesh plate enters the range of the fan interface, the suction force generated by the fan attracts the mesh plate and pulls the mesh plate upward. At this time, after the side of the mesh plate enters the part where the ventilation groove is located, the fan no longer attracts the mesh plate, so that under the action of the reset spring, the sliding column collides with the limit frame, so that the wet particles and powder in the mesh plate are shaken off into the concrete being mixed. Through the above-mentioned arrangement, not only the stirring device can capture the scattered particles and powder generated during mixing, thereby realizing dust reduction in the production workshop, but also as the mesh of the mesh plate is sealed, the capturing capacity decreases, so that the suction force generated by the fan can realize automatic cleaning of the mesh plate, so that the dust removal of the equipment can be carried out continuously.

[0016] 2. Secondly, the present invention provides a watering port and a mounting cylinder. After the suction force generated by the fan cleans the mesh plate, the mesh plate moves to the next position as the shaft rotates. At this time, the water sprayed from the watering port impacts the mesh plate, thereby washing off the remaining wet particles and powder that may be attached to the mesh plate. At the same time, the pressurized water passes through the mesh of the mesh plate and is atomized, thereby making the water and other raw materials mixed more evenly. At the same time, after the water wets the mesh plate, the effect of capturing the scattered particles and powder is stronger, further preventing the raw materials from being sucked away by the fan and causing the mixed concrete parameters to fail to meet the standards.

[0017] 3. Finally, the scraper provided in the present invention rotates along with the rotation of the middle circle, thereby causing the scraper to scrape the inner top surface of the outer shell. During the mixing process of the concrete, some materials splash onto the inner top surface of the outer shell and are quickly dried and solidified due to the air flow generated by the fan. At this time, during the rotation of the mounting tube, the membrane on the upper part thereof rubs against the attached solidified concrete, thereby damaging the membrane. The damaged membrane will cause the installation tube and the fan interface to be unsealed and unable to be pulled when the fan attracts the mesh plate, thereby preventing the mesh plate from being automatically cleaned. As the middle circle rotates, the scraper automatically scrapes and cleans the inner top surface of the outer shell to protect the membrane. At the same time, the suspended concrete will fall into the concrete below under the action of gravity to prevent waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a cross-sectional view of the shell of the structure of the present invention;

[0020] Figure 3 It is an overall schematic diagram of the dust removal mechanism of the present invention;

[0021] Figure 4This is a cross-sectional view of the upper plate of the structure of the present invention;

[0022] Figure 5 It is a cross-sectional view of the structural mounting frame of the present invention.

[0023] In the figure: 1. base; 2. shell; 3. cover plate; 4. fan interface; 5. sprinkler port; 6. rotating shaft; 7. discharge port; 8. connecting plate; 9. stirring rod; 10. upper plate; 11. lower plate; 12. middle ring; 13. needle bearing; 14. rotating column; 15. first gear; 16. second gear; 17. third gear; 18. gear ring; 19. connecting ring; 20. mounting frame; 21. mounting cylinder; 22. ventilation groove; 23. mesh plate; 24. limit frame; 25. sliding column; 26. reset spring; 27. membrane; 28. fixing frame; 29. ​​scraper. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] like Figures 1 to 5 As shown, an embodiment of the present invention provides a dust removal device for concrete production, including a base 1 and a shell 2 fixed thereon, the top of the shell 2 is in a truncated cone shape, and a feed port is opened on its side, a cover plate 3 is hinged on the side of the shell 2, and a fan interface 4 is fixedly connected to the outer side of the cover plate 3, and the fan interface 4 is communicated with the feed port, a rotating shaft 6 is rotatably installed inside the shell 2, and an upper plate 10 is rotatably installed on the side of the rotating shaft 6, the top surface of the upper plate 10 is fixedly connected to the inner top surface of the shell 2, the bottom surface of the upper plate 10 is fixedly connected to the lower plate 11 through a connecting rod, and the bottom surface of the upper plate 10 and the top surface of the lower plate 11 are both fixedly connected to roller needles Bearing 13, a middle ring 12 is abutted between two needle bearings 13, and a plurality of centrally symmetrical mounting frames 20 and fixing frames 28 are fixedly connected to the outer side surface of the middle ring 12. A mounting tube 21 is fixedly sleeved inside the mounting frame 20, and a plurality of ventilation grooves 22 are provided on the inner side surface of the mounting tube 21. A mesh plate 23 is slidably connected inside the mounting tube 21, and a limiting frame 24 is fixedly connected to the top surface of the mounting tube 21. A sliding column 25 is slidably sleeved at the center of the limiting frame 24, and the bottom end of the sliding column 25 is fixedly connected to the center of the mesh plate 23. A reset spring 26 is movably sleeved on the sliding column 25, and a membrane 27 is fixedly sleeved on the outer side surface of the mounting tube 21.

[0026] In the present invention, as the rotating shaft 6 rotates to drive the stirring rod 9 to stir the raw materials, the raw materials in the shell 2 will fly with the movement of the stirring rod 9. After these raw materials are scattered and attached to the wet mesh plate 23, as the mounting tube 21 corresponding to the mesh plate 23 enters the range of the fan interface 4, the suction force generated by the fan attracts the mesh plate 23 and pulls the mesh plate 23 upward. At this time, after the side of the mesh plate 23 enters the part where the ventilation groove 22 is located, the fan no longer attracts the mesh plate 23, so that under the action of the reset spring 26, the sliding column 25 collides with the limit frame 24, so that the wet particles and powder in the mesh plate 23 are shaken off into the concrete being mixed. Through the above-mentioned arrangement, not only the stirring device can capture the scattered particles and powder generated during mixing to achieve dust reduction in the production workshop, but also as the mesh of the mesh plate 23 is sealed, the capturing capacity decreases, so that the suction force generated by the fan can realize automatic cleaning of the mesh plate 23, so that the dust removal of the equipment can be carried out continuously.

[0027] Secondly, through the provided watering port 5 and the mounting tube 21, after the suction force generated by the fan cleans the mesh plate 23, as the rotating shaft 6 rotates, the mesh plate 23 enters the next position, at this time, the water sprayed from the watering port 5 impacts the mesh plate 23, thereby washing off the remaining wet particles and powder that may be attached to the mesh plate 23, and at the same time, the pressurized water passes through the mesh of the mesh plate 23 and is atomized after passing through the mesh plate 23, so that the water is mixed with other raw materials more evenly, and at the same time, after the water wets the mesh plate 23, the effect of capturing the scattered particles and powder is stronger, further preventing the raw materials from being sucked away by the fan and causing the mixed concrete parameters to be substandard.

[0028] Finally, with the rotation of the middle ring 12, the scraper 29 rotates together with the scraper 29, so that the scraper 29 scrapes the inner top surface of the outer shell 2. During the mixing process of the concrete, some materials splash onto the inner top surface of the outer shell 2 and are quickly dried and solidified due to the air flow generated by the fan. At this time, during the rotation of the mounting cylinder 21, the membrane 27 on its upper part rubs against the attached solidified concrete, thereby damaging the membrane 27. The damaged membrane 27 will cause the mounting cylinder 21 and the fan interface 4 to be unsealed and unable to be pulled when the fan attracts the mesh plate 23, thereby making it impossible for the mesh plate 23 to be automatically cleaned. As the middle ring 12 rotates, the scraper 29 automatically scrapes and cleans the inner top surface of the outer shell 2 to protect the membrane 27. At the same time, the scraped concrete will fall into the concrete below under the action of gravity to prevent waste.

[0029] The mounting frame 20 and the fixing frame 28 are arranged at intervals, and a scraper 29 is fixedly connected to the side of the fixing frame 28 , and the scraper 29 is tangent to the inner side surface of the truncated cone-shaped top of the outer shell 2 .

[0030] The scraper 29 is set so that during the actual mixing process, as the stirring rod 9 stirs the concrete raw materials, part of the cement, fine aggregate, admixtures and additives mixed with water will splash onto the inner top surface of the outer shell 2. After these splashes adhere to the inner top surface, they will quickly dry and solidify due to the airflow generated by the fan exhaust. After the equipment has been used for a long time, a large amount of dry air-dried cement is easily accumulated on the top, causing wear to the membrane 27. At this time, the scraper 29 rotating with the middle circle 12 can scrape these materials off during the rotation process to prevent damage to the membrane 27, and at the same time prevent a large amount of air-dried cement from adhering to the inside of the outer shell 2, causing the center of gravity of the equipment to move upward. At the same time, scraping off the cement and other raw materials splashed on the top of the outer shell 2 can also ensure that during the mixing process, the metering of admixtures and admixtures in the concrete meets the design requirements.

[0031] Among them, the inner diameter of the mounting tube 21 is less than or equal to the diameter of the feed port opened on the outer shell 2, the inner diameter of the membrane 27 is larger than the diameter of the feed port, the membrane 27 is elastic, the length of the ventilation groove 22 is less than the height of the mounting tube 21, and the multiple ventilation grooves 22 are arranged symmetrically with the central axis of the sliding column 25.

[0032] As the fan connected to the fan interface 4 starts, one end of the membrane 27 moves toward the feed port on the housing 2. As the membrane 27 covers the feed port inside, the air pressure generated by the operation of the fan will pull the mesh plate 23 blocked by the wet concrete upward. The membrane 27 ensures the lifting effect of the fan. As the mesh plate 23 moves upward, as the edge of the mesh plate 23 reaches the part where the ventilation groove 22 is located, the sealing state of the installation cylinder 21 and the mesh plate 23 is broken. Under the push of the reset spring 26, the mesh plate 23 will move downward quickly, and the limiter at the top of the sliding column 25 will It collides with the limit frame 24, causing the installation cylinder 21 and the mesh plate 23 to vibrate. At this time, the mesh plate 23, under the impact force generated by the reset spring 26 and its own vibration, shakes the wet concrete blocked in the mesh holes into the inside of the shell 2, thereby preventing the particles and powder inside the shell 2 from being sucked out by the fan, reducing the workload of the filtering device at the production site and extending the working time of its filter element. At the same time, shaking the scattered particles and powder back into the shell 2 can prevent the actual addition amount of admixtures and additives in the upper layer from being too little, which will lead to the produced concrete not meeting the actual demand.

[0033] Among them, the inner side surface of the middle ring 12 is fixedly sleeved with a ring gear 18, the side surface of the rotating shaft 6 is fixedly sleeved with a first gear 15, the inner part of the upper plate 10 is rotatably installed with a rotating column 14, the side surface of the rotating column 14 is fixedly sleeved with a second gear 16 and a third gear 17, the first gear 15 is meshed with the second gear 16, the third gear 17 is meshed with the ring gear 18, the diameter of the first gear 15 is larger than the diameter of the second gear 16, the first gear 15 is a gear with partial teeth, and the number of teeth is equal to the number of teeth of the second gear 16.

[0034] As the equipment is running, the rotating shaft 6 rotates and drives the connecting plate 8 and the stirring rod 9 to stir and mix the raw materials in the outer shell 2. As the rotating shaft 6 rotates, it drives the first gear 15 to rotate. As the first gear 15 rotates together with the rotating shaft 6, the second gear 16 is driven to rotate, and the third gear 17 coaxial with the second gear 16 rotates. At this time, the third gear 17 drives the gear ring 18 meshing with it to rotate, and the rotation of the gear ring 18 drives the middle ring 12 on its outer side to rotate, and then the middle ring 12 drives the mounting frame 20 to rotate, so that one mounting cylinder 21 rotates to the position of the previous mounting cylinder 21, completing the switching of the mounting cylinder 21, and as the position of the mounting cylinder 21 changes, the fan and the sprinkler 5 clean the mesh plates 23 in different mounting cylinders 21.

[0035] The outer side surface of the truncated cone-shaped top of the housing 2 is fixedly connected with a water sprinkling port 5 , and the water sprinkling port 5 and the feed port correspond to a mounting tube 21 respectively.

[0036] During the concrete mixing process, it is necessary to add water while mixing, and water with a certain pressure is injected into the sprinkler port 5 so that the pressurized water is sprayed out from the sprinkler port 5 at the nozzle located in the shell 2. At this time, the water will be sprayed on the mesh plate 23, and then the mesh plate 23 will be flushed, so as to wash away the remaining wet particles and powder attached to the mesh plate 23. At this time, the stripped material flows with the water and falls into the concrete being mixed in the shell 2. At this time, after the mesh plate 23 continues to rotate and leaves the sprinkler port 5, its mesh part has moisture, which can better capture the particles and powder scattered in the shell 2, thereby reducing the possibility of particles and powder flying to the outside, and as the pressurized water impacts the mesh plate 23, the water changes from the pressurized state to the normal state, and is atomized by the mesh of the mesh plate 23, thereby improving the mixing uniformity of water and other raw materials.

[0037] The ends of the mounting frame 20 and the fixing frame 28 away from the middle circle 12 are fixedly connected to the connecting ring 19 , and the center of the connecting ring 19 coincides with the axis of the rotating shaft 6 .

[0038] The connecting ring 19 mainly serves to fix the mounting frame 20 and the fixing frame 28, ensuring the stability of the mounting frame 20 and the fixing frame 28 during the rotation of the middle ring 12, and at the same time stabilizing the corresponding mounting frame 20 when pressurized water enters the impact mesh plate 23 from the watering port 5.

[0039] Among them, a plurality of connecting plates 8 are fixedly sleeved on the side of the rotating shaft 6, and a plurality of stirring rods 9 with different distances from the rotating shaft 6 are fixedly connected to the outer side of the connecting plate 8. A discharge port 7 is fixedly set on the bottom side of the shell 2.

[0040] The plurality of stirring rods 9 at different distances from the rotating shaft 6 enable the concrete to be mixed and stirred uniformly in the vertical direction of the housing 2 .

[0041] Working principle:

[0042] At the beginning of the feeding stage, the raw materials of concrete are poured into the interior of the housing 2 by removing the installation cylinder 21 at the position of the fan interface 4, and after the feeding is completed, the installation cylinder 21 and the auxiliary parts are installed.

[0043] In the subsequent stirring process, as the motor drives the shaft 6 to rotate, the shaft 6 drives the stirring rod 9 to work, and the raw materials in the shell 2 are stirred and mixed. At this time, pressurized water is injected into the shell 2 through the sprinkler port 5. At this time, the pressurized water will be dispersed and atomized by the mesh plate 23, thereby preventing the water flow from directly impacting the raw materials. At the same time, the water will wet the mesh plate 23, so that the effect of the mesh plate 23 in capturing floating materials such as dust is improved. At the same time, the fan is turned on to make the floating particles and dust float toward the mesh plate 23 located at the fan interface 4. At this time, as the mesh of the mesh plate 23 is blocked by floating objects, the suction force generated by the fan attracts the mesh plate 23 to move upward. When the mesh plate 23 moves upward and causes its side to enter the ventilation groove 22, the mesh plate 23 loses the attraction of the fan, and under the action of the reset spring 26, the top of the sliding column 25 collides with the limit frame 24, so that the material on the mesh plate 23 is shaken off.

[0044] As the shaft 6 rotates, it drives the first gear 15 to rotate, and as the first gear 15 meshes with the second gear 16, it drives the second gear 16 to rotate, so that the second gear 16 drives the third gear 17 to rotate through the rotating column 14, and then drives the gear ring 18 to rotate. After the shaft 6 rotates one circle, multiple installation cylinders 21 rotate forward one position in turn. At this time, the subsequent mesh plates 23 enter the fan interface 4 and repeat the previous step. The mesh plates 23 in the previous step enter the sprinkler port 5 and are washed by the water flow, thereby washing down the remaining attachments, and in the installation cylinder 21 When switching positions, the fan and water pump are controlled to be turned off by the electronic circuit to prevent the fan from drawing out the concrete raw materials and pressurized water inside the shell 2 to directly impact the concrete when the installation tube 21 does not enter the position of the fan interface 4 or the sprinkler port 5. At the same time, according to actual needs, by adjusting the number and size of teeth of the first gear 15, the second gear 16 and the third gear 17 or increasing or decreasing gears to rotate the shaft 6 for different numbers of circles to drive the middle circle 12 to rotate, the time interval between the installation tube 21 entering the next position is adjusted, and then the shutdown interval of the fan and water pump is adjusted.

[0045] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dust removal device for concrete production, comprising a base (1) and a housing (2) fixed thereon, wherein the top of the housing (2) is in a truncated cone shape and a feed port is provided on its side, and is characterized in that: A cover plate (3) is hingedly connected to the side of the shell (2), and a fan interface (4) is fixedly connected to the outer side of the cover plate (3), and the fan interface (4) is communicated with the feed port. A rotating shaft (6) is rotatably installed inside the shell (2), and an upper plate (10) is rotatably installed on the side of the rotating shaft (6). The top surface of the upper plate (10) is fixedly connected to the inner top surface of the shell (2), and the bottom surface of the upper plate (10) is fixedly connected to the lower plate (11) through a connecting rod. The bottom surface of the upper plate (10) and the top surface of the lower plate (11) are both fixedly connected to needle bearings (13), and a middle ring (12) is abutted between the two needle bearings (13). The outer side of the middle ring (12) A plurality of centrally symmetrical mounting frames (20) and fixing frames (28) are fixedly connected on the surface; a mounting tube (21) is fixedly sleeved inside the mounting frame (20); a plurality of ventilation grooves (22) are provided on the inner side surface of the mounting tube (21); a mesh plate (23) is slidably connected inside the mounting tube (21); a limiting frame (24) is fixedly connected to the top surface of the mounting tube (21); a sliding column (25) is slidably sleeved at the center of the limiting frame (24); the bottom end of the sliding column (25) is fixedly connected to the center of the mesh plate (23); a return spring (26) is movably sleeved on the sliding column (25); and a membrane (27) is fixedly sleeved on the outer side surface of the mounting tube (21).

2. The dust removal equipment for concrete production according to claim 1, characterized in that: The mounting frame (20) and the fixing frame (28) are arranged at intervals, and a scraper (29) is fixedly connected to the side of the fixing frame (28), and the scraper (29) is tangent to the inner side surface of the truncated cone-shaped top of the outer shell (2).

3. A dust removal device for concrete production according to claim 2, characterized in that: The inner diameter of the mounting cylinder (21) is smaller than or equal to the diameter of the feed port opened on the outer shell (2), the inner diameter of the membrane (27) is larger than the diameter of the feed port, and the membrane (27) is elastic.

4. The dust removal equipment for concrete production according to claim 3 is characterized in that: The length of the ventilation groove (22) is smaller than the height of the mounting tube (21), and the plurality of ventilation grooves (22) are centrally symmetrically arranged about the central axis of the sliding column (25).

5. The dust removal equipment for concrete production according to claim 4, characterized in that: The inner side surface of the middle ring (12) is fixedly sleeved with a gear ring (18), the side surface of the rotating shaft (6) is fixedly sleeved with a first gear (15), the interior of the upper plate (10) is rotatably mounted with a rotating column (14), and the side surface of the rotating column (14) is fixedly sleeved with a second gear (16) and a third gear (17).

6. The dust removal equipment for concrete production according to claim 5, characterized in that: The first gear (15) is meshed with the second gear (16), and the third gear (17) is meshed with the ring gear (18).

7. The dust removal equipment for concrete production according to claim 6, characterized in that: The diameter of the first gear (15) is greater than the diameter of the second gear (16); the first gear (15) is a gear with partial teeth, and the number of teeth is equal to the number of teeth of the second gear (16).

8. The dust removal equipment for concrete production according to claim 7, characterized in that: A water sprinkling port (5) is fixedly connected to the outer side surface of the truncated cone-shaped top of the housing (2), and the water sprinkling port (5) and the feed port correspond to a mounting cylinder (21) respectively.

9. The dust removal equipment for concrete production according to claim 8, characterized in that: The ends of the mounting frame (20) and the fixing frame (28) away from the middle ring (12) are both fixedly connected to the connecting ring (19), and the center of the connecting ring (19) coincides with the axis of the rotating shaft (6).

10. The dust removal equipment for concrete production according to claim 9, characterized in that: A plurality of connection disks (8) are fixedly sleeved on the side of the rotating shaft (6), a plurality of stirring rods (9) at different distances from the rotating shaft (6) are fixedly connected to the outer side of the connection disk (8), and a discharge port (7) is fixedly provided on the bottom side of the housing (2).

Images