Rotary anti-overload gas cleaning device

Abstract

A rotary anti-overload gas cleaning device, wherein the inside of the central tube is provided with a plurality of air passage channels, the air nozzles are connected to the periphery of the central tube, and each column of air nozzles is connected to an air hole scraping plate; an air passage side support is connected to one end of the central tube, a first bearing is arranged inside the air passage side support, and an air passage side pressing plate is connected to the inner side of the air passage side support; the air passage side support is formed with an air passage total hole, the central tube rotates to connect the air passage channels to the air passage total hole; a pressing wheel is connected to the other end of the central tube, the pressing wheel and the central tube are in contact through a wedge surface, the outer end of the pressing wheel is provided with a central shaft, a wheel side support is connected to the abutting position of the pressing wheel and the central tube, a second bearing is arranged inside the wheel side support, the central shaft extends from the side of the wheel side support, and an adjusting elastic member is arranged on the periphery of the central shaft and is located inside the wheel side support. The present application reduces wear, can perform anti-overload protection and multi-station conversion, and has good scraping effect.

Description

TECHNICAL FIELD

[0001] The application relates to a rotary anti-overload gas material cleaning device and belongs to the technical field of material conveying. BACKGROUND

[0002] Belt conveyors are widely used in various industries and can realize long-distance conveying of powdery or blocky materials. When conveying materials with high moisture content or high viscosity, part of the materials will often adhere to the belt. Incomplete material cleaning for a long time will cause material scattering and falling, material adhesion to the carrier roller and the drum, and further cause belt deviation and tearing, etc. accidents, and also cause pollution to the surrounding environment.

[0003] At present, in order to clean the materials adhered to the belt, a flexible material scraping plate made of polyurethane, old belt material, etc. is usually used, and a spring, a counterweight, a pneumatic or other power element is used to make the material scraping plate contact with the belt, so as to clean the adhered materials. However, such a scheme has certain limitations:

[0004] First, in order to increase the cleaning effect, the pre-tightening force of the material scraping plate contacting with the belt is too large, which causes serious belt wear;

[0005] Secondly, at the head wheel, if a hard object is stuck between the belt and the material scraping plate, the belt will be torn out of the groove, which has a great impact on the service life of the belt and also causes accidents;

[0006] Thirdly, since the pre-tightening force is a constant force, the materials are easily accumulated at the joint of the material scraping plate and the belt, thereby reducing the material scraping effect. SUMMARY

[0007] The application aims to provide a rotary anti-overload gas material cleaning device to solve the problems of traditional technology that the belt is seriously worn, the belt is easily torn out of the groove, and the material scraping effect is poor.

[0008] The technical scheme for solving the above technical problems is as follows: a rotary anti-overload gas material cleaning device for a belt conveyor, wherein the belt conveyor is provided with a conveying belt and a driving drum, and the device comprises a center pipe, an air nozzle, a gas hole scraping plate, a ventilation side support, a first bearing, a pressure roller, a wheel side support, a second bearing and an adjusting elastic element.

[0009] The inside of the center pipe is provided with a plurality of ventilation channels, the air nozzle is connected to the periphery of the center pipe, the number of columns of the air nozzle is the same as the number of the ventilation channels, and each column of the air nozzle conducts one ventilation channel; each column of the air nozzle is connected with one gas hole scraping plate;

[0010] The ventilation side support is connected to one end of the central pipe, the first bearing is arranged inside the ventilation side support, and the first bearing is arranged on the periphery of the central pipe; the ventilation side pressing plate is connected to the inner side of the ventilation side support, and the ventilation side pressing plate is arranged on the periphery of the central pipe;

[0011] The ventilation side support is formed with a ventilation total hole, and the central pipe rotates to make the ventilation channel communicate with the ventilation total hole;

[0012] The pressing wheel is connected to the other end of the central pipe, the pressing wheel and the central pipe are in contact through a wedge surface, and the outer end of the pressing wheel is provided with a central shaft; the wheel side support is connected to the abutting position of the pressing wheel and the central pipe, the second bearing is arranged inside the wheel side support, and the second bearing is arranged on the periphery of the central pipe; the central shaft extends from the side of the wheel side support, the adjusting elastic member is arranged on the periphery of the central shaft, and the adjusting elastic member is arranged on the inner side of the wheel side support.

[0013] As a preferred solution of the rotating anti-overload gas cleaning device, a plurality of ventilation channels are isolated from each other, and each ventilation channel is connected to a column of gas nozzles arranged outside the central pipe;

[0014] The gas hole scraping plate is formed with a plurality of blowing holes corresponding to the number of the gas nozzles, and the blowing holes are connected to the gas nozzles.

[0015] As a preferred solution of the rotating anti-overload gas cleaning device, the ventilation total hole is arranged above the central point of the ventilation side support; the central pipe rotates to make the ventilation channel corresponding to the gas hole scraping plate arranged directly below the conveying belt communicate with the ventilation total hole.

[0016] As a preferred solution of the rotating anti-overload gas cleaning device, a ventilation side pressing plate is further arranged, the ventilation side pressing plate is connected to the inner side of the ventilation side support, the ventilation side pressing plate is arranged on the periphery of the central pipe, and the position where the ventilation side pressing plate contacts the outer wall of the central pipe is provided with a first sealing ring.

[0017] As a preferred solution of the rotating anti-overload gas cleaning device, one end of the central pipe connected to the pressing wheel is in a closed state, so that the airflow of the ventilation channel enters the corresponding gas nozzle.

[0018] As a preferred solution of the rotating anti-overload gas cleaning device, the inner diameter of the ventilation total hole is smaller than the inner diameter of the ventilation channel, and a high-pressure air pipe is connected to the outer part of the ventilation total hole;

[0019] The position where the inner wall of the ventilation side support contacts the edge of the ventilation channel is provided with a second sealing ring.

[0020] As a preferred solution of the rotating anti-overload gas cleaning device, the number of the wedge-shaped surfaces at the contact position between the compression wheel and the center pipe is the same as the number of the air passage.

[0021] As a preferred solution of the rotating anti-overload gas cleaning device, a wheel-side pressing plate is further included, which is connected to the inner side of the wheel-side support, is located at the periphery of the center pipe, and is provided with a third sealing ring at the position where the wheel-side pressing plate contacts the outer wall of the center pipe.

[0022] As a preferred solution of the rotating anti-overload gas cleaning device, the outer side of the compression wheel is further provided with an auxiliary shaft, which is annularly distributed at the periphery of the center shaft and extends out from the outer side of the wheel-side pressing plate.

[0023] An auxiliary elastic member is sleeved on the auxiliary shaft and located at the inner side of the wheel-side pressing plate.

[0024] As a preferred solution of the rotating anti-overload gas cleaning device, a fourth sealing ring is connected to the position where the wheel-side pressing plate contacts the center shaft.

[0025] The center pipe, the air nozzle, the air hole scraping plate, the air passage side support, the first bearing, the compression wheel, the wheel-side support, the second bearing and the adjusting elastic member are provided; the inside of the center pipe is provided with a plurality of air passage, the air nozzle is connected to the periphery of the center pipe, the number of the air nozzle is the same as the number of the air passage, and each column of the air nozzle guides one air passage; each column of the air nozzle is connected with one air hole scraping plate; the air passage side support is connected to one end of the center pipe, the first bearing is arranged in the inside of the air passage side support, the first bearing is arranged at the periphery of the center pipe, and the air passage side pressing plate is connected to the inner side of the air passage side support; the air passage side support is formed with an air total hole, and the center pipe is rotated to make the air passage communicate with the air total hole; the compression wheel is connected to the other end of the center pipe, the compression wheel and the center pipe are in contact through a wedge-shaped surface, and the outer end of the compression wheel is provided with a center shaft; the wheel-side support is connected to the abutting position between the compression wheel and the center pipe, the second bearing is arranged in the inside of the wheel-side support, and the second bearing is arranged at the periphery of the center pipe; the center shaft extends out from the side of the wheel-side support, the adjusting elastic member is arranged at the periphery of the center shaft, and the adjusting elastic member is located at the inner side of the wheel-side support. The air cushion is formed between the air hole scraping plate and the conveying belt, and the abrasion is reduced; the anti-overload protection and the multi-station conversion can be performed, the conveying belt has strong running stability, long service life and high safety, and the material is more easily cleaned and less likely to accumulate at the joint surface, and the scraping effect is good. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required by the embodiments or the prior art description. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other drawings can be obtained from the provided drawings without creative labor.

[0027] The structures, proportions, sizes, etc. shown in the specification are only used to cooperate with the content disclosed in the specification, to be understood and read by those skilled in the art, and are not used to limit the conditions that the present application can be implemented, so they do not have technical significance. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effects and purposes that the present application can produce, should still fall within the scope of the technical content disclosed by the present application.

[0028] Figure 1 A three-dimensional schematic view of the rotating anti-overload gas cleaning equipment provided by the embodiment of the present application is provided.

[0029] Figure 2 A side view schematic view of the rotating anti-overload gas cleaning equipment provided by the embodiment of the present application is provided.

[0030] Figure 3 A three-dimensional schematic view of the rotating anti-overload gas cleaning equipment provided by the embodiment of the present application is provided.

[0031] Figure 4 A sectional view schematic view of the rotating anti-overload gas cleaning equipment provided by the embodiment of the present application is provided.

[0032] In the figure, in order to more clearly show the structure, only one group of air hole scrapers is shown; in addition, the auxiliary elastic member is not shown as an unnecessary technical feature; in the figure, 1, a conveying belt; 2, a transmission drum; 3, a center tube; 4, an air nozzle; 5, an air hole scraper; 6, a ventilation side support; 7, a first bearing; 8, a pressure roller; 9, a wheel side support; 10, a second bearing; 11, an adjusting elastic member; 12, a ventilation passage; 13, a ventilation total hole; 14, a wedge surface; 15, a center shaft; 16, a blowing hole; 17, a ventilation side pressing plate; 18, a first sealing ring; 19, a second sealing ring; 20, a wheel side pressing plate; 21, an auxiliary shaft; 22, a fourth sealing ring; 23, a third sealing ring. DETAILED DESCRIPTION

[0033] In order to make the above objectives, features and advantages of the present application more obvious and comprehensible, the specific embodiments of the present application are described in detail below with reference to the drawings. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, and therefore the present application is not limited to the specific embodiments disclosed below.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0035] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the embodiment of the present application provides a rotary anti-overload gas cleaning device for a belt conveyor, the belt conveyor is provided with a conveying belt 1 and a driving drum 2, and the device comprises a central pipe 3, an air nozzle 4, a gas hole scraper 5, a gas side support 6, a first bearing 7, a pressure roller 8, a wheel side support 9, a second bearing 10 and an adjusting elastic member 11.

[0036] The inside of the central pipe 3 is provided with six gas passage channels 12, the air nozzle 4 is connected to the periphery of the central pipe 3, the number of columns of the air nozzle 4 is the same as the number of the gas passage channels 12, and each column of the air nozzle 4 is connected to one gas passage channel 12; and each column of the air nozzle 4 is connected to one gas hole scraper 5.

[0037] The gas side support 6 is connected to one end of the central pipe 3, the first bearing 7 is arranged in the inside of the gas side support 6, the first bearing 7 is arranged at the periphery of the central pipe 3, and a gas side pressing plate 17 is connected to the inside of the gas side support 6.

[0038] The gas side support 6 is formed with a gas total hole 13, and the central pipe 3 rotates to connect the gas passage channels 12 to the gas total hole 13.

[0039] The pressure roller 8 is connected to the other end of the central pipe 3, the pressure roller 8 and the central pipe 3 are in contact through a wedge surface 14, the outer end of the pressure roller 8 is provided with a central shaft 15; the wheel side support 9 is connected to the abutting position of the pressure roller 8 and the central pipe 3, the second bearing 10 is arranged in the inside of the wheel side support 9, and the second bearing 10 is arranged at the periphery of the central pipe 3; the central shaft 15 extends from the side of the wheel side support 9, the adjusting elastic member 11 is arranged at the periphery of the central shaft 15, and the adjusting elastic member 11 is arranged at the inside of the wheel side support 9.

[0040] In the embodiment, the six ventilation channels 12 are isolated from each other, and each ventilation channel 12 is connected to a column of air nozzles 4 outside the central pipe 3; the air hole scraping plate 5 is formed with a number of air blowing holes 16 corresponding to the number of air nozzles 4, and the air blowing holes 16 are connected to the air nozzles 4. The ventilation total hole 13 is located above the center point of the ventilation side support 6; the rotation of the central pipe 3 makes the ventilation channel 12 corresponding to the air hole scraping plate 5 directly below the conveying belt 1 connected to the ventilation total hole 13.

[0041] Specifically, not all the ventilation channels 12 are ventilated, but only when the ventilation channel 12 is rotated to the position corresponding to the ventilation total hole 13, the high-pressure air source is connected, at this time, the ventilation channel 12 corresponding to the air hole scraping plate 5 directly below the conveying belt 1 is connected to the air source, the airflow is discharged through the air nozzle 4 and the air blowing hole 16, so that there is a layer of high-pressure gas between the air hole scraping plate 5 and the conveying belt 1, avoiding direct contact between the air hole scraping plate 5 and the conveying belt 1, thereby avoiding wear of the conveying belt 1, and at the same time, the conveying belt 1 can be assisted in cleaning, drying material and conveying.

[0042] In the embodiment, the ventilation side pressing plate 17 is also included, which is connected to the inner side of the ventilation side support 6, and the ventilation side pressing plate 17 is located at the periphery of the central pipe 3, and the position where the ventilation side pressing plate 17 contacts the outer wall of the central pipe 3 is provided with a first sealing ring 18.

[0043] Specifically, the ventilation side pressing plate 17 cooperates with the ventilation side support 6 to realize the installation and protection of the first bearing 7, and the first bearing 7 supports the rotation of the end of the central pipe 3. The first sealing ring 18 can prevent material from entering the inside of the ventilation side support 6, ensuring the stability of the operation of the first bearing 7.

[0044] In the embodiment, the inner diameter of the ventilation total hole 13 is smaller than the inner diameter of the ventilation channel 12, and the outside of the ventilation total hole 13 is connected to a high-pressure air pipe; the position where the inner wall of the ventilation side support 6 contacts the edge of the ventilation channel 12 is provided with a second sealing ring 19; and one end of the central pipe 3 connected to the pressing wheel 8 is in a closed state, so that the airflow of the ventilation channel 12 enters the corresponding air nozzle 4.

[0045] Specifically, the high-pressure airflow is introduced into the corresponding ventilation channel 12 from the ventilation total hole 13 through the high-pressure air pipe, and since one end of the central pipe 3 is closed, the airflow entering the ventilation channel 12 cannot leak from the other end of the central pipe 3, but can only enter the corresponding air nozzle 4 from the ventilation channel 12, thereby realizing the air jet effect of the air hole scraping plate 5. The design of the second sealing ring 19 avoids leakage of airflow from the joint between the ventilation total hole 13 and the ventilation channel 12.

[0046] In this embodiment, the number of wedge surfaces 14 at the contact position of the compression wheel 8 and the central tube 3 is the same as the number of ventilation channels 12; in addition, a wheel side pressing plate 20 is connected to the inner side of the wheel side support 9, the wheel side pressing plate 20 is located at the periphery of the central tube 3, and the position where the wheel side pressing plate 20 contacts the outer wall of the central tube 3 is provided with a third sealing ring 23; the outer side of the compression wheel 8 is also provided with an auxiliary shaft 21, which is annularly distributed at the periphery of the central shaft 15 and extends from the outer side of the wheel side pressing plate 20; the auxiliary shaft 21 is sleeved with an auxiliary elastic member, which is located at the inner side of the wheel side pressing plate 20.

[0047] Specifically, the end surface of the compression wheel 8 has six circumferentially distributed wedge surfaces 14, the other end of the compression wheel 8 has a central shaft 15 and six circumferentially distributed auxiliary shafts 21, and the end surface structure of the closed end of the central tube 3 is also six wedge surfaces 14, which can cooperate with the wedge surfaces 14 of the compression wheel 8.

[0048] Among them, the wheel side pressing plate 20 cooperates with the wheel side support 9 to realize the installation and protection of the second bearing 10, and the second bearing 10 supports the rotation of the end part of the central tube 3. The third sealing ring 23 can prevent material from entering the inside of the wheel side support 9, and ensure the stability of the operation of the second bearing 10.

[0049] Among them, the adjusting elastic member 11 adopts a spring or a leaf spring, which provides resistance through deformation, and compresses the wedge-shaped cooperation surface of the closed end of the compression wheel 8 and the central tube 3. When hard objects are blocked or other overloads occur, the air hole scraper plate 5 drives the central tube 3 to rotate, and the wedge surfaces 14 contacted by the compression wheel 8 and the central tube 3 are relatively displaced. When the stress exceeds the maximum deformation of the adjusting elastic member 11 (when the rotating torque overcomes the pre-tightening force provided by the spring of the adjusting elastic member 11), the central tube 3 will rotate 60 degrees (one circle has six wedge surfaces 14, and one wedge surface 14 corresponds to 60 degrees), and enter the next pair of wedge surfaces 14 engagement, thereby avoiding overload. At this time, the ventilation total hole 13 on the ventilation side support 6 will be connected with the new ventilation channel 12 on the central tube 3, and the new air hole scraper plate 5 will be in a ventilation working state.

[0050] Among them, the auxiliary elastic member can cooperate with the adjusting elastic member 11 to jointly prevent overload and ensure the reliability of overload prevention.

[0051] In this embodiment, the position where the wheel side pressing plate 20 contacts the central shaft 15 is connected with a fourth sealing ring 22. The fourth sealing ring 22 can seal the contact position of the central shaft 15 and the wheel side pressing plate 20, and prevent dust from entering and affecting the work of the adjusting elastic member 11.

[0052] According to the application, the center tube 3 is provided with a plurality of air passage channels 12, the air nozzles 4 are connected to the periphery of the center tube 3, the number of the air nozzles 4 is the same as that of the air passage channels 12, each column of the air nozzles 4 is connected to one air passage channel 12, each column of the air nozzles 4 is connected to one air hole scraping plate 5, the air passage side support 6 is connected to one end of the center tube 3, the first bearing 7 is arranged in the air passage side support 6, the first bearing 7 is arranged on the periphery of the center tube 3, the air passage side pressing plate 17 is connected to the inner side of the air passage side support 6, the air passage side support 6 is formed with an air passage total hole 13, the center tube 3 rotates to connect the air passage channels 12 to the air passage total hole 13, the pressing wheel 8 is connected to the other end of the center tube 3, the pressing wheel 8 and the center tube 3 are in contact through the wedge surface 14, the outer end of the pressing wheel 8 is provided with a center shaft 15, the wheel side support 9 is connected to the abutting position of the pressing wheel 8 and the center tube 3, the second bearing 10 is arranged in the wheel side support 9, the second bearing 10 is arranged on the periphery of the center tube 3, the center shaft 15 extends from the side of the wheel side support 9, the adjusting elastic element 11 is arranged on the periphery of the center shaft 15, and the adjusting elastic element 11 is arranged on the inner side of the wheel side support 9. The air passage channels 12 are not all connected to the air source, but only when the air passage channels 12 are rotated to the position corresponding to the air passage total hole 13, the air source is connected to the air passage channels 12, at this time, the air passage channels 12 corresponding to the air hole scraping plate 5 rotating below the conveying belt 1 are connected to the air source, the air flow is guided out through the air nozzles 4 and the air blowing holes 16, so that the air hole scraping plate 5 is isolated from the conveying belt 1 by a layer of high-pressure gas, direct contact between the air hole scraping plate 5 and the conveying belt 1 is avoided, the conveying belt 1 is prevented from being worn, and the conveying belt 1 can be assisted in cleaning, drying and conveying. The air passage side pressing plate 17 cooperates with the air passage side support 6 to realize the installation and protection of the first bearing 7, and the first bearing 7 supports the rotation of the end of the center tube 3. The first sealing ring 18 can prevent the material from entering the inside of the air passage side support 6, and ensure the stability of the operation of the first bearing 7. The high-pressure air flow is introduced into the corresponding air passage channels 12 through the high-pressure air pipe from the air passage total hole 13, the air flow entering the air passage channels 12 cannot leak from the other end of the center tube 3, but only enters the corresponding air nozzles 4 through the air passage channels 12, so that the air jet effect of the air hole scraping plate 5 is realized. The design of the second sealing ring 19 prevents the air flow from leaking from the abutting position of the air passage total hole 13 and the air passage channel 12. The adjusting elastic element 11 is a spring or a leaf spring, which provides resistance through deformation, and presses the wedge surface of the closed end of the pressing wheel 8 and the center tube 3.When the hard blockage or other overload occurs, the air hole scraper 5 drives the center tube 3 to rotate, the wedge surface 14 of the contact between the pressure wheel 8 and the center tube 3 is relatively displaced, when the force exceeds the elastic force of the maximum deformation of the adjusting elastic member 11 (the rotating torque overcomes the pre-tightening force provided by the spring of the adjusting elastic member 11), the center tube 3 will rotate 60 degrees (one circle has six wedge surfaces 14, one wedge surface 14 corresponds to 60 degrees), enter the next pair of wedge surfaces 14 engagement, thereby avoiding overload. At this time, the total air hole 13 on the air side support 6 will be connected with the new air passage 12 on the center tube 3, the new air hole scraper 5 is in working condition. The air cushion is formed between the air hole scraper 5 and the conveying belt 1, the wear is reduced; the overload protection and the multi-station conversion can be carried out, the conveying belt 1 is stable in operation, long in service life, high in safety, more easy to clean the material, and more not easy to make the material accumulate at the joint surface, the scraping effect is good.

[0053] The technical features of the above-mentioned embodiments can be combined arbitrarily, and in order to make the description simple, all possible combinations of the technical features in the above-mentioned embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered that it is within the scope of the present application.

[0054] The above-mentioned embodiments only express several embodiments of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of variations and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A rotary anti-overload gas cleaning device for a belt conveyor, said belt conveyor being provided with a conveyor belt (1) and a drive drum (2), characterised in that, The center tube (3), the air nozzle (4), the air hole scraping plate (5), the ventilation side support (6), the first bearing (7), the pressure wheel (8), the wheel side support (9), the second bearing (10) and the adjusting elastic element (11) are included. The inside of the center tube (3) is provided with a plurality of ventilation channels (12), the air nozzle (4) is connected to the periphery of the center tube (3), the number of the air nozzle (4) is the same as the number of the ventilation channel (12), each column of the air nozzle (4) is connected to one of the ventilation channels (12); each column of the air nozzle (4) is connected to one of the air hole scraping plates (5). The ventilation side support (6) is connected to one end of the center tube (3), the first bearing (7) is arranged in the inside of the ventilation side support (6), the first bearing (7) is arranged on the periphery of the center tube (3), and the ventilation side pressing plate (17) is connected to the inside of the ventilation side support (6). The ventilation side support (6) is formed with a ventilation total hole (13), and the center tube (3) is rotated to make the ventilation channel (12) communicate with the ventilation total hole (13). The pressure wheel (8) is connected to the other end of the center tube (3), the pressure wheel (8) and the center tube (3) are contacted through the wedge surface (14), the outer end of the pressure wheel (8) is provided with a center shaft (15); the wheel side support (9) is connected to the abutting place of the pressure wheel (8) and the center tube (3), the second bearing (10) is arranged in the inside of the wheel side support (9), and the second bearing (10) is arranged on the periphery of the center tube (3); the center shaft (15) is arranged on the periphery of the center tube (3), and the adjusting elastic element (11) is arranged on the periphery of the center shaft (15).

2. A rotating anti-overload gas cleaning device according to claim 1, characterized in that The plurality of ventilation channels (12) are isolated from each other, and each ventilation channel (12) is connected to a column of air nozzles (4) outside the center tube (3). The air hole scraping plate (5) is formed with a plurality of air blowing holes (16) corresponding to the number of the air nozzles (4), and the air blowing hole (16) is connected to the air nozzle (4).

3. A rotating anti-overload gas cleaning device according to claim 2, characterized in that The ventilation total hole (13) is above the center point of the ventilation side support (6); the center tube (3) is rotated to make the ventilation channel (12) corresponding to the air hole scraping plate (5) directly below the conveying belt (1) communicate with the ventilation total hole (13).

4. A rotating anti-overload gas cleaning device according to claim 1, characterized in that The ventilation side pressing plate (17) is arranged on the periphery of the center tube (3), and the first sealing ring (18) is arranged on the position of the ventilation side pressing plate (17) contacting the outer wall of the center tube (3).

5. A rotating anti-overload gas cleaning device according to claim 4, characterized in that The end of the center tube (3) connected to the pressure wheel (8) is in a closed state, so that the air flow of the ventilation channel (12) enters the corresponding air nozzle (4).

6. A rotating anti-overload gas cleaning device according to claim 5, characterized in that The inner diameter of the ventilation total hole (13) is smaller than the inner diameter of the ventilation channel (12), and the outside of the ventilation total hole (13) is connected to a high-pressure air pipe. The inner wall of the ventilation side support (6) is provided with a second sealing ring (19) contacting the edge of the ventilation channel (12).

7. A rotating anti-overload gas cleaning device according to claim 6, characterized in that The number of the wedge surfaces (14) at the contact position of the compression wheel (8) and the center tube (3) is the same as the number of the ventilation channels (12).

8. A rotating anti-overload gas cleaning device according to claim 7, characterized in that A wheel-side pressing plate (20) is further included, which is connected to the inner side of the wheel-side support (9) and contacts the outer wall of the center tube (3) at the position of the wheel-side pressing plate (20).

9. A rotating anti-overload gas cleaning device according to claim 8, characterized in that An auxiliary shaft (21) is further arranged on the outer side of the compression wheel (8), which is annularly distributed on the outer periphery of the center shaft (15) and extends out from the outer side of the wheel-side pressing plate (20). An auxiliary elastic member is sleeved on the auxiliary shaft (21) and located on the inner side of the wheel-side pressing plate (20).

10. A rotating anti-overload gas cleaning device according to claim 9, characterized in that A fourth sealing ring (22) is connected to the position where the wheel-side pressing plate (20) contacts the center shaft (15).

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