Screw conveyor with ash discharge and self-cleaning functions for bag type dust collector

Abstract

The invention discloses a bag type dust collector screw conveyer with ash discharging and self-cleaning functions, and relates to the technical field of environmental engineering, the bag type dust collector screw conveyer comprises a machine shell, a screw blade, an air blowing assembly and a feeding and discharging adjusting assembly, the screw blade is fixedly installed in the center of the interior of the machine shell, and the air blowing assembly is fixedly installed on the inner wall of the machine shell in the axial direction; a feeding and discharging assembly is fixedly installed on the side face of the outer wall of the machine shell. By means of the air blowing assembly and the flexible scraping ring, the dust discharging and self-cleaning functions are achieved, the problem that manual cleaning operation is complex when waste is accumulated and left is solved, and secondary flying of dust in the dust remover can be avoided through efficient dust discharging.

Description

Technical Field

[0001] The invention relates to the technical field of environmental engineering, in particular to a screw conveyor for a bag-type dust collector with dust discharge and self-cleaning functions. Background Art

[0002] Bag dust collector is a dry dust filtering device. With the continuous improvement of people's awareness of environmental protection, the requirements for dust emission control in industrial production are becoming more and more stringent. As a highly efficient dust removal equipment, bag dust collector has been widely used in various industries, thus driving the market demand for related equipment such as supporting screw conveyors. In order to meet environmental protection requirements, enterprises must install efficient bag dust collectors and supporting screw conveyors to deal with dust generated in the production process. Driven by the concept of environmental protection, the treatment of industrial dust is no longer limited to emission control, but also focuses on the recycling of useful substances in dust.

[0003] With the development of technology, its processing air volume, dust removal efficiency and other performance are constantly improving, but there are still some problems in the dust discharge link. For example, dust is easy to accumulate and clog in the dust discharge device, affecting the normal operation and dust removal efficiency of the dust collector. Traditional screw conveyors are easy to clog and difficult to clean when conveying powdery materials such as dust. Moreover, the conveying capacity of the screw conveyor is generally relatively fixed. When the amount of dust collected by the bag dust collector is large, it cannot meet the needs of rapid dust discharge.

[0004] Therefore, it is very necessary for the present application to propose a screw conveyor for bag dust collector with dust discharge and self-cleaning function to solve the problems in the background.

[0005] 1. Patent document CN115848948B discloses a self-cleaning screw conveyor. The above patent realizes the fully automatic closed cleaning of the screw conveyor without disassembling and cleaning the screw conveyor, which solves the problem of manual disassembly and cleaning of the screw conveyor, greatly reduces the cleaning difficulty and reduces the labor intensity of cleaning. However, the above patent cannot realize the ash removal self-cleaning function.

[0006] 2. Patent document CN103057918B discloses an automatic atomizing humidifying dust suppression conveyor for cigarettes. The above patent realizes the functions of a screw conveyor being complete, with a high degree of automation, good control accuracy, a reasonable and compact structure, simple operation, a high degree of visualization, and convenient information parameter control. It can effectively solve the problems of clean production and on-site environmental protection, and is beneficial to the physical and mental health of employees. However, the above patent cannot realize the function of evenly regulating the input and output of materials.

[0007] 3. Patent document CN114275473B discloses a spiral conveyor device for blending shredded tobacco. The above patent solves the problem that the existing spiral conveyor device for blending shredded tobacco cannot have the functions of convenient movement and stable placement, which affects the transportation convenience and processing stability of the device, and does not have a self-cleaning function. A small amount of tobacco is easily left in the device, and the processing requirements of the user cannot be met. However, the above patent cannot achieve environmentally friendly sealing.

[0008] 4. Patent document CN109422074B discloses a screw conveying mechanism with a stirring function. The above patent realizes that the different components in the material can be fully and evenly mixed through the stirring action of the stirring plate during the conveying process, thereby avoiding the influence of uneven mixing on the normal progress of the subsequent process and reducing the use of special stirring equipment. However, the above patent cannot realize intelligent operation and maintenance.

[0009] In summary, the above patents cannot achieve the functions of uniformly regulating the inflow and outflow of materials, environmentally friendly sealing functions, intelligent operation and maintenance, and ash removal and self-cleaning functions, resulting in waste accumulation, complicated manual cleaning operations, uneven material transportation, blockage, dust leakage, impurity pollution, and untimely fault handling; To this end, the present application proposes a screw conveyor for a bag dust collector that can achieve the functions of uniformly regulating the inflow and outflow of materials, environmentally friendly sealing function, intelligent operation and maintenance, and dust discharge and self-cleaning functions. Summary of the invention

[0010] The object of the present invention is to provide a screw conveyor for a bag dust collector with ash discharge and self-cleaning functions, so as to solve the technical problems proposed in the above-mentioned background technology that the functions of uniformly adjusting the material inlet and outlet, environmentally friendly sealing function, intelligent operation and maintenance, and ash discharge and self-cleaning functions cannot be realized, resulting in waste accumulation and residual, complicated manual cleaning operation, uneven material transportation and blockage, dust leakage and impurity pollution, and untimely fault handling.

[0011] To achieve the above object, the present invention provides the following technical solution: a screw conveyor for a bag dust collector with dust discharge and self-cleaning function, comprising a casing, a spiral blade, an air blowing assembly and an inlet and outlet adjustment assembly, wherein a spiral blade is fixedly installed at the center of the casing, an air blowing assembly is fixedly installed along the axial direction on the inner wall of the casing, and an inlet and outlet assembly is fixedly installed on the side of the outer wall of the casing; The air blowing assembly comprises a nozzle, an air inlet interface and a rotary joint, the air inlet of the nozzle is connected to the rotary joint through a sealing adapter, a sealing ring is placed in the middle of the sealing adapter, the air inlet end of the rotary joint is connected to the air outlet end of the air inlet interface through a thread, the air inlet interface is connected to an external compressed air source through an air pipe, a positioning hole is provided around the air inlet of the nozzle, a positioning pin is fixedly installed at the connecting part of the nozzle and the rotary joint, the rotating shaft of the nozzle is connected to the output shaft of the motor through a gear set, and limited position units are fixedly installed on both sides of the outer wall of the rotary joint; The outer ring of the spiral blade contacts and cooperates with the inner ring of the auxiliary spiral blade. The outer ring of the auxiliary spiral blade is fixedly connected with a flexible scraper ring. One side of the flexible scraper ring is arranged along the radial direction of the auxiliary spiral blade. The end of the flexible scraper ring contacts and cooperates with the inner wall of the casing.

[0012] Preferably, a feed port is provided at the upper end of the outer wall of the casing, a discharge port is provided at the lower end of the outer wall of the casing, and gland structures are fixedly installed at the edges of the outer walls of the feed port and the discharge port, and rubber sealing gaskets are fixedly connected between the gland structures and the feed port and the discharge port, respectively, and upper supports are fixedly installed at the four corners on both sides of the bottom of the outer wall of the casing by bolts, a coil spring is fixedly installed at the bottom of the outer wall of the upper support, and a lower support is fixedly installed at the bottom of the outer wall of the coil spring; A connecting seat is fixedly installed on the side surface of the outer wall of the casing by means of bolts, a vibration motor is fixedly connected to the connecting seat by means of bolts, and a rubber shock-absorbing pad is fixedly installed between the vibration motor and the connecting seat.

[0013] Preferably, the spiral blade adopts a combined spiral blade structure, and the combined spiral blade structure is designed as a variable pitch form. The variable pitch form gradually increases from the feed port to the discharge port. The spiral blade is divided into three sections, the length of the first section at the feed end is L1, the length of the second section in the middle section is L2, and the length of the third section at the discharge end is L3. The ash discharge amount Q, the material stacking density ρ, the feed end pitch P1 is the ash discharge amount divided by the product of the axial speed of the material at the feed end and the filling coefficient, the middle section pitch P2 is the ash discharge amount divided by the product of the axial speed of the material in the middle section and the filling coefficient, and the discharge end pitch P3 is the ash discharge amount divided by the product of the axial speed of the material at the discharge end and the filling coefficient; L1 is 1-1.5 times P1, L2 is 3-5 times P2, and L3 is 1.5-2 times P3; The ratio of the pitch of the third section discharge end to the diameter of the circle formed by the outermost edge of the spiral blade is 1:1-1.2:1, and the ratio of the pitch of the first section feed end and the second section middle section to the diameter of the circle formed by the outermost edge of the spiral blade is 0.8:1-1:1.

[0014] Preferably, the casing adopts a U-shape, and the U-shaped bottom is easy to concentrate waste accumulation, a drive component is fixedly installed at one end of the outer wall of the casing, a protective cover is installed around the outer wall of the drive component, an inspection port is opened at the connection of the outer wall of the casing, the outer wall of the spiral blade is provided with a spiral pattern, and the spiral pattern is opposite to the material conveying direction, and guide plates are fixedly installed on both sides of the inner wall of the casing, and the outer wall of the guide plate is connected to the control system by a fixed electric push rod, the control system controls the electric push rod through electrical signals, and the electric push rod drives the guide plate through mechanical force, and the guide plate is connected to the casing through a connecting arm, and an electric push rod is fixedly installed on the top of the outer wall of the connecting arm. The adjustment angle range of the guide plate is 0-45 degrees, the surface of the guide plate is provided with an anti-stick coating, and the edge of the guide plate is provided with a rubber sealing strip, and the rubber sealing strip ensures that the guide plate is tightly fitted with the inner wall of the casing.

[0015] Preferably, a first ash discharge port is provided on the outer wall corresponding to the second section of the casing, a second ash discharge port is provided at the bottom of the outer wall of the casing, valves are fixedly installed inside the first ash discharge port and the second ash discharge port through flanges, and the valve stems of the valves are connected to the output shaft of the driving assembly; Flow sensors are fixedly installed on the inner walls of the No. 1 and No. 2 ash discharge ports, a No. 1 pressure sensor is fixedly installed on the outer wall side of the nozzle, and a No. 2 pressure sensor is fixedly installed at the gap position between the spiral blade and the casing.

[0016] Preferably, the feed port adopts a double-layer structure, the outer layer is set as a fixed feed hopper, the inner layer is set as a rotating adjustment cylinder, a feed hole is opened on the rotating adjustment cylinder, a dust accumulation sensor is fixedly installed on the inner wall of the casing and the spiral blade 5 meters away from the feed port, the dust accumulation sensor transmits the dust accumulation situation to the control system through wireless communication technology, a material level sensor is fixedly installed on the side of the outer wall of the feed port, and a semicircular collection trough is fixedly installed below the end of the outer wall of the discharge port; An exhaust port is provided at the bottom of the outer wall of the casing, which is connected to the negative pressure system of the bag dust collector through an air pipe. A filter is fixedly installed at the exhaust port. The driving assembly drives the rotating adjustment cylinder through gear transmission. The feed hole is in the shape of a long strip, and the length direction of the feed hole forms an angle of 30-60 degrees with the direction of material movement.

[0017] Preferably, a strain gauge is embedded inside the spiral blade, a displacement sensor is fixedly installed at each connection of the spiral blade, sealing rings are fixedly installed at both ends of the spiral blade, an elastic sealing rubber layer is sandwiched in the middle of the sealing ring, and an annular groove corresponding to the sealing ring is provided at both ends of the inner wall of the casing, the annular groove is composed of concentric circles, and a sealing cover is wrapped around the outer side of the annular groove; An annular support frame is fixedly installed below the outer walls of the feed port and the discharge port. The width of the annular support frame below the feed port is 1 / 3-1 / 2 of the diameter of the first section of the spiral blade, and the height is 1 / 2-2 / 3 of the height of the spiral blade. The width of the annular support frame below the discharge port is 1 / 4-1 / 3 of the diameter of the third section of the spiral blade, and the height is 1 / 3-1 / 2 of the height of the spiral blade.

[0018] Preferably, a permanent magnet is fixedly mounted on the output shaft of the motor, a drive shaft is fixedly mounted on both ends of the spiral blade, and a torque sensor is fixedly mounted on the transmission chain between the drive shaft and the drive assembly; The flexible scraper ring is made of rubber with a hardness of 65-85 Shore A and a thickness of 3-8mm. The contact pressure between the flexible scraper ring and the inner wall of the casing is 0.2-0.5Mpa, and a brush is embedded in the bottom of the outer wall of the flexible scraper ring.

[0019] Preferably, the control system integrates signal inputs of a flow sensor, a No. 1 pressure sensor, a No. 2 pressure sensor, a strain gauge, a displacement sensor, a torque sensor and a level sensor. The control system includes a main controller, a data acquisition module, a signal processing module and an execution control module. The main controller collects the sensor signals in real time through the data acquisition module. After analysis and processing by the signal processing module, the execution control module sends a control instruction to the actuator. An emergency stop instruction is provided inside the control system.

[0020] Preferably, the casing is made of wear-resistant steel, the inner wall is coated with an anti-stick coating, the spiral blade is made of alloy steel, the surface is hardened, the gap between the spiral blade and the casing is controlled at 2-5mm, the spray angle of the nozzle is adjusted within the range of 0-360 degrees, the execution control module is connected to the vibration motor via a data cable, and the limit unit uses a limit block to control the angle.

[0021] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention realizes the self-cleaning function of dust removal through the air blowing component and the flexible scraper ring, solves the problem of complicated manual cleaning operation of waste accumulation and residue, and the efficient dust removal can also prevent the secondary flying of dust in the dust collector; 2. The present invention realizes the function of uniformly regulating the inflow and outflow of materials through the combined spiral blade structure, solves the problem of blockage caused by uneven material transportation, helps to exert the self-cleaning function of ash discharge, and improves the stability and reliability of equipment operation; 3. The present invention realizes an environmentally friendly sealing function through an elastic sealant layer, solves the problem of dust leakage and impurity pollution, protects the health of operators, prolongs the service life of the equipment, and further saves the cost of equipment maintenance and replacement; 4. The present invention realizes intelligent operation and maintenance through an integrated control system, solves the problem of untimely fault handling, and improves the automation level of the equipment and the continuity of production. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a front view structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the front structure of the present invention; Figure 3 It is a schematic structural diagram of the sealing part of the present invention; Figure 4 It is a partial structural schematic diagram of the control system of the present invention; Figure 5 It is a structural schematic diagram of the material inlet and outlet adjustment part of the present invention; Figure 6 This is a schematic diagram of the structure of the dust removal self-cleaning part of the present invention; Figure 7 It is a partial structural schematic diagram of the support frame of the present invention.

[0023] In the figure: 1. Casing; 2. Spiral blade; 3. Nozzle; 4. Air inlet interface; 5. Rotary joint; 6. Sealing adapter; 7. Sealing ring; 8. Positioning pin; 9. Secondary spiral blade; 10. Flexible scraper ring; 11. Dust accumulation sensor; 12. Feed inlet; 13. Discharge outlet; 14. Rubber sealing gasket; 15. Protective cover; 16. Inspection port; 17. Upper support; 18. Spiral spring; 19. Lower support; 20. Connecting seat; 21. Vibration motor; 22. Rubber shock-absorbing pad; 23. Row 1 Ash outlet; 24. Ash outlet No. 2; 25. Valve; 26. Material level sensor; 27. Feed hopper; 28. Rotary adjustment cylinder; 29. ​​Air exhaust port; 30. Material guide plate; 31. Flow sensor; 32. Pressure sensor No. 1; 33. Pressure sensor No. 2; 34. Collecting tank; 35. Strain gauge; 36. Displacement sensor; 37. Permanent magnet; 38. Connecting arm; 39. Sealing ring; 40. Annular groove; 41. Sealing cover; 42. Annular support frame; 43. Drive shaft; 44. Torque sensor. 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] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] See also Figure 1 , Figure 2 and Figure 3 , an embodiment provided by the present invention: a screw conveyor for a bag-type dust collector with a dust discharge and self-cleaning function, comprising a casing 1, a spiral blade 2, an air blowing assembly and an inlet and outlet adjustment assembly, wherein a spiral blade 2 is fixedly installed at the center of the casing 1, an air blowing assembly is fixedly installed on the inner wall of the casing 1 along the axial direction, and an inlet and outlet assembly is fixedly installed on the side of the outer wall of the casing 1; the air blowing assembly comprises a nozzle 3, an air inlet interface 4 and a rotary joint 5, the air inlet of the nozzle 3 is connected to the rotary joint 5 through a sealing adapter 6, a sealing ring 7 is placed in the middle of the sealing adapter 6, the air inlet end of the rotary joint 5 is connected to the air outlet end of the air inlet interface 4 through a thread, the air inlet interface 4 is connected to an external compressed air source through an air pipe, a positioning hole is opened around the air inlet of the nozzle 3, a positioning pin 8 is fixedly installed at the connecting part of the nozzle 3 and the rotary joint 5, the rotating shaft of the nozzle 3 is connected to the output shaft of the motor through a gear set, and limited position units are fixedly installed on both sides of the outer wall of the rotary joint 5; The output shaft of the motor is fixedly mounted with a permanent magnet 37, and drive shafts 43 are fixedly mounted at both ends of the spiral blade 2. A torque sensor 44 is fixedly mounted on the transmission chain between the drive shaft 43 and the drive assembly; the flexible scraper ring 10 is made of rubber material, with a hardness of 65-85 Shore A and a thickness of 3-8 mm. The contact pressure between the flexible scraper ring 10 and the inner wall of the housing 1 is 0.2-0.5 MPa, and a brush is embedded in the bottom of the outer wall of the flexible scraper ring 10; The control system integrates the signal inputs of the flow sensor 31, the first pressure sensor 32, the second pressure sensor 33, the strain gauge 35, the displacement sensor 36, the torque sensor 44 and the material level sensor 26. The control system includes a main controller, a data acquisition module, a signal processing module and an execution control module. The main controller collects the sensor signals in real time through the data acquisition module. After the signals are analyzed and processed by the signal processing module, the execution control module sends a control command to the actuator. An emergency stop command is provided inside the control system. Further, the drive assembly is started to drive the spiral blade 2 to rotate and start conveying the material. At the same time, the motor is started to drive the nozzle 3 to rotate, and the valve of the air inlet interface 4 is opened, so that the compressed air enters the nozzle 3 through the rotary joint 5 and the sealing adapter 6, and the compressed air is sprayed into the inside of the casing 1 to remove the dust on the inner wall of the casing and the surface of the spiral blade. The vibration motor 21 is started to reduce the adhesion of the material on the inner wall of the casing by vibration. According to the signals of the material level sensor 26 and the dust accumulation sensor 11, the control system adjusts the position and size of the feed hole of the rotating adjustment cylinder 28 through the drive assembly, and adjusts the angle of the guide plate 30 through the electric push rod to ensure uniform and stable feeding and conveying of the material.

[0028] During operation, the flow sensor 31 monitors the ash discharge flow of the first ash discharge port 23 and the second ash discharge port 24 in real time, the first pressure sensor 32 and the second pressure sensor 33 monitor the air pressure at the nozzle 3 and the pressure between the spiral blade 2 and the housing 1 respectively, the strain gauge 35 and the displacement sensor 36 continuously monitor the force and deformation of the spiral blade 2, and the torque sensor 44 monitors the torque of the drive shaft 43. The control system analyzes the signals of these sensors through the signal processing module.

[0029] If the flow sensor 31 detects an abnormal ash discharge flow, the control system can adjust the opening of the valve 25; if the pressure sensor detects abnormal pressure, indicating that there is a problem with the gap between the air blowing component or the spiral blade 2 and the casing 1, the control system can issue an alarm or take corresponding adjustment measures; if the strain gauge 35 or the displacement sensor 36 detects abnormal deformation of the spiral blade 2, or the torque sensor 44 detects that the torque is too large, the control system will trigger an emergency stop command to stop the equipment operation and avoid further damage.

[0030] See also Figure 1 , Figure 3 and Figure 5 , an embodiment provided by the present invention: a screw conveyor for a bag dust collector with dust discharge and self-cleaning functions, a connecting seat 20 is fixedly installed on the outer wall side of the casing 1 by bolts, a vibration motor 21 is fixedly connected to the connecting seat 20 by bolts, and a rubber shock-absorbing pad 22 is fixedly installed between the vibration motor 21 and the connecting seat 20; The outer wall corresponding to the second section of the casing 1 is provided with a first ash discharge port 23, and the bottom end of the outer wall of the casing 1 is provided with a second ash discharge port 24. A valve 25 is fixedly installed inside the first ash discharge port 23 and the second ash discharge port 24 through a flange, and the valve stem of the valve 25 is connected to the output shaft of the driving component; a flow sensor 31 is fixedly installed on the inner wall of the first ash discharge port 23 and the second ash discharge port 24, a first pressure sensor 32 is fixedly installed on the outer wall side of the nozzle 3, and a second pressure sensor 33 is fixedly installed at the gap position between the spiral blade 2 and the casing 1; Further, first, prepare the housing 1, the connection base 20, the vibration motor 21 and the rubber shock-absorbing pad 22. The connection base 20 is fixedly installed at a designated position on the side of the outer wall of the housing 1 by bolts.

[0031] Next, the rubber shock-absorbing pad 22 is placed between the vibration motor 21 and the connecting base 20 to ensure that it is positioned accurately and can effectively absorb shock. Then, the vibration motor 21 and the connecting base 20 are firmly connected using bolts, so that the vibration motor 21 is stably installed on the housing 1. This installation method can buffer the vibration generated by the vibration motor 21 during operation through the rubber shock-absorbing pad 22, reducing the impact on the housing 1 and other connecting parts.

[0032] At the outer wall position corresponding to the second section of the casing 1, the first ash discharge port 23 is accurately opened, and the second ash discharge port 24 is opened at the bottom of the outer wall of the casing 1. The valve 25 is prepared and fixedly installed inside the first ash discharge port 23 and the second ash discharge port 24 through the flange. Ensure that the valve stem of the valve 25 is correctly connected to the output shaft of the drive assembly so that the opening and closing of the valve 25 can be controlled by the drive assembly. The flow sensor 31 is installed on the inner wall of the first ash discharge port 23 and the second ash discharge port 24. The flow sensor 31 should be installed firmly, and its probe part is accurately located in the fluid channel of the ash discharge port, which can accurately measure the material flow rate during the ash discharge process. The first pressure sensor 32 is fixedly installed on the side of the outer wall of the nozzle 3. During the installation process, attention should be paid to the close fit between the sensor and the surface of the nozzle 3 to ensure that it can accurately measure the pressure around the nozzle 3 when it is working, so as to reflect the working state of the air blowing assembly. The second pressure sensor 33 is installed in the gap between the spiral blade 2 and the casing 1. Be careful during installation to avoid interference with the normal rotation of the spiral blade 2. The second pressure sensor 33 can monitor the pressure changes between the spiral blade 2 and the casing 1 in real time. When the pressure is abnormal, such as the pressure increase caused by material accumulation, it can feedback information in time to provide a basis for judging and adjusting the operating status of the equipment.

[0033] See also Figure 1 , Figure 2 and Figure 7, an embodiment provided by the present invention: a screw conveyor for a bag dust collector with ash discharge and self-cleaning functions, the spiral blade 2 adopts a combined spiral blade structure, the combined spiral blade structure is designed as a variable pitch form, the variable pitch form gradually increases from the feed port 12 to the discharge port 13, the spiral blade 2 is divided into three sections, the first section feed end length is L1, the second section middle section length is L2, the third section discharge end length is L3, the ash discharge amount Q, the material stacking density ρ, the feed end pitch P1 is the ash discharge amount divided by the feed end material axial speed and filling coefficient The product of the pitch P2 of the middle section is the ash discharge volume divided by the product of the axial speed of the material in the middle section and the filling coefficient, and the pitch P3 of the discharge end is the ash discharge volume divided by the product of the axial speed of the material at the discharge end and the filling coefficient; L1 is 1-1.5 times P1, L2 is 3-5 times P2, and L3 is 1.5-2 times P3; the ratio of the pitch of the third section discharge end to the diameter of the circle formed by the outermost edge of the spiral blade 2 is 1:1-1.2:1, and the ratio of the pitch of the first section feed end and the second section middle section to the diameter of the circle formed by the outermost edge of the spiral blade 2 is 0.8:1-1:1; An annular support frame 42 is fixedly installed below the outer wall of the feed port 12 and the discharge port 13. The width of the annular support frame 42 below the feed port 12 is 1 / 3-1 / 2 of the diameter of the first section of the spiral blade 2, and the height is 1 / 2-2 / 3 of the height of the spiral blade 2. The width of the annular support frame 42 below the discharge port 13 is 1 / 4-1 / 3 of the diameter of the third section of the spiral blade 2, and the height is 1 / 3-1 / 2 of the height of the spiral blade 2. The housing 1 is made of wear-resistant steel, the inner wall is coated with an anti-stick coating, the spiral blade 2 is made of alloy steel, the surface is hardened, the gap between the spiral blade 2 and the housing 1 is controlled within 2-5 mm, the spray angle of the nozzle 3 is adjusted within the range of 0-360 degrees, the execution control module is connected to the vibration motor 21 through a data line, and the limit unit uses a limit block to control the angle; Further, the drive assembly is started to make the spiral blade 2 start to rotate. The material enters from the feed port 12. The double-layer structure of the feed port 12 can adjust the feed amount and feed direction through the drive assembly through the gear transmission to drive the rotating adjustment cylinder 28. During the material conveying process, the nozzle 3 of the air blowing assembly sprays air to the inner wall of the casing 1 according to the set spray angle to remove dust that may be attached. At the same time, the variable pitch design and the specific length of each section on the spiral blade 2 ensure that the material can be stably conveyed at different stages.

[0034] During operation, the main controller of the control system obtains sensor signals through the data acquisition module and analyzes and processes them through the signal processing module. The dust accumulation situation is monitored by the dust accumulation sensor 11. If an abnormality is found, the jet parameters of the air blowing component or the vibration frequency of the vibration motor 21 can be adjusted by the execution control module. The material level of the feed port 12 is monitored by the material level sensor 26 to ensure stable feeding. At the same time, the strain gauge 35 inside the spiral blade 2 and the displacement sensor 36 at each connection section monitor the stress and deformation of the spiral blade 2 in real time. If the data exceeds the normal range, the control system can issue an alarm or take corresponding protective measures in time. In addition, the flow sensor 31 in the No. 1 ash discharge port 23 and the No. 2 ash discharge port 24 can monitor the ash discharge situation, and the ash discharge amount can be controlled in conjunction with the valve 25. The No. 1 pressure sensor 32 on the side of the outer wall of the nozzle 3 and the No. 2 pressure sensor 33 at the gap position between the spiral blade 2 and the casing 1 can monitor the air blowing pressure and internal pressure to ensure safe and stable operation of the equipment.

[0035] The material is transported to the discharge port 13 under the push of the spiral blade 2, and the discharged material is collected in the semicircular collection groove 34 below the discharge port 13. Driven by the auxiliary spiral blade 9, the flexible scraper ring 10 scrapes off the dust and residual material on the inner wall of the casing 1 as the spiral blade 2 rotates, realizing the self-cleaning function.

[0036] See also Figure 1 , Figure 3 and Figure 6 , an embodiment provided by the present invention: a screw conveyor for a bag-type dust collector with dust discharge and self-cleaning functions, wherein a feed port 12 is provided at the upper end of the outer wall of the casing 1, and a discharge port 13 is provided at the lower end of the outer wall of the casing 1, and a gland structure is fixedly installed on the outer wall edges of the feed port 12 and the discharge port 13, and a rubber sealing gasket 14 is fixedly connected between the gland structure and the feed port 12 and the discharge port 13, and an upper support 17 is fixedly installed at the four corners on both sides of the bottom of the outer wall of the casing 1 by bolts, and a coil spring 18 is fixedly installed at the bottom of the outer wall of the upper support 17, and a lower support 19 is fixedly installed at the bottom of the outer wall of the coil spring 18; The feed port 12 adopts a double-layer structure, the outer layer is set as a fixed feed hopper 27, the inner layer is set as a rotating adjustment cylinder 28, the rotating adjustment cylinder 28 is provided with a feed hole, the inner wall of the housing 1 and the spiral blade 2 are fixedly installed with a dust accumulation sensor 11, the dust accumulation sensor 11 transmits the dust accumulation situation to the control system through wireless communication technology, the side of the outer wall of the feed port 12 is fixedly installed with a material level sensor 26, and the lower end of the outer wall of the discharge port 13 is fixedly installed with a semicircular collection groove 34; The casing 1 is in a U-shape, and the bottom of the U-shape is easy to concentrate waste accumulation. A driving component is fixedly installed at one end of the outer wall of the casing 1, and a protective cover 15 is installed around the outer wall of the driving component. An inspection port 16 is opened at the connection of the outer wall of the casing 1. The outer wall of the spiral blade 2 is provided with a spiral pattern, and the spiral pattern is opposite to the material conveying direction. Guide plates 30 are fixedly installed on both sides of the inner wall of the casing 1. The outer wall of the guide plate 30 is connected to the control system by a fixed electric push rod. The control system controls the electric push rod through an electric signal. The electric push rod drives the guide plate 30 through mechanical force. The guide plate 30 is connected to the casing 1 through a connecting arm 38. The top of the outer wall of the connecting arm 38 is fixedly installed with an electric push rod. The adjustment angle range of the guide plate 30 is 0-45 degrees. The surface of the guide plate 30 is provided with an anti-stick coating, and the edge of the guide plate 30 is provided with a rubber sealing strip. The rubber sealing strip ensures that the guide plate 30 is tightly matched with the inner wall of the casing 1. Further, the material enters the rotating adjustment cylinder 28 through the feed hopper 27, and the rotating adjustment cylinder 28 can adjust the position of the feed hole as needed to achieve a certain control of the feed amount and feed direction. The material level sensor 26 monitors the material situation of the feed port 12 in real time and feeds back the data to the control system.

[0037] The drive assembly is started to drive the spiral blade 2 to rotate. Since the spiral pattern on the outer wall of the spiral blade 2 is opposite to the material conveying direction, the material is conveyed along the housing 1 to the discharge port 13 under the action of the spiral blade 2. During the conveying process, the control system determines the dust accumulation on the housing 1 and the spiral blade 2 according to the information transmitted by the dust accumulation sensor 11, and can guide the conveying path of the material by adjusting the angle of the guide plate 30 to prevent the material from accumulating on the inner wall of the housing 1. The anti-stick coating and rubber sealing strip of the guide plate 30 ensure that it is well matched with the inner wall of the housing 1 to prevent material leakage and adhesion.

[0038] The material is finally discharged through the discharge port 13 and falls into the semicircular collection tank 34. During the whole process, the rubber sealing gaskets 14 of the feed port 12 and the discharge port 13 ensure the sealing of the equipment and prevent dust leakage. The U-shaped structure of the housing 1 facilitates the centralized accumulation of waste at the bottom for subsequent cleaning, and the support and buffer structure of the equipment can effectively reduce the vibration and displacement during the operation of the equipment, ensuring the stable operation of the equipment.

[0039] See also Figure 1 , Figure 4 and Figure 6 , an embodiment provided by the present invention: a screw conveyor for a bag-type dust collector with a dust discharge and self-cleaning function, the outer ring of the spiral blade 2 contacts and matches the inner ring of the auxiliary spiral blade 9, the outer ring of the auxiliary spiral blade 9 is fixedly connected with a flexible scraper ring 10, one side of the flexible scraper ring 10 is arranged along the radial direction of the auxiliary spiral blade 9, and the end of the flexible scraper ring 10 contacts and matches with the inner wall of the casing 1; A strain gauge 35 is embedded inside the spiral blade 2, a displacement sensor 36 is fixedly installed at each connection of the spiral blade 2, sealing rings 39 are fixedly installed at both ends of the spiral blade 2, and an elastic sealing rubber layer is sandwiched in the middle of the sealing ring 39. An annular groove 40 corresponding to the sealing ring 39 is provided at both ends of the inner wall of the housing 1. The annular groove 40 is composed of concentric circles, and a sealing cover 41 is wrapped around the outer side of the annular groove 40; An air suction port 29 is provided at the bottom of the outer wall of the casing 1, and the air suction port 29 is connected to the negative pressure system of the bag filter through an air pipe. A filter screen is fixedly installed at the air suction port 29, and the driving assembly drives the rotating adjustment cylinder 28 through gear transmission. The shape of the feed hole is a long strip, and the length direction of the feed hole forms an angle of 30-60 degrees with the direction of material movement; Furthermore, during the operation of the screw conveyor, the negative pressure system of the bag filter produces a suction effect on the housing 1 through the suction port 29, and the dust and some fine materials in the housing 1 can be sucked into the bag filter, further enhancing the dust removal function. The filter can prevent material particles from entering the suction pipe to avoid damage to the negative pressure system.

[0040] At the feed port, the drive assembly drives the rotating adjustment cylinder 28 through gear transmission. The feed hole is in the shape of a long strip. When installing, pay attention to make the length direction of the feed hole form an angle of 30-60 degrees with the direction of material movement. This design allows the material to contact the spiral blade 2 more smoothly when entering the housing 1, and can adjust the feed amount and feed direction by rotating the rotating adjustment cylinder 28 according to factors such as the characteristics of the material and the feed speed, so as to ensure that the material enters the screw conveyor evenly for transportation.

[0041] Working principle: the external compressed air source supplies air to the nozzle 3 through the air pipe, the air inlet interface 4, the rotary joint 5, and the sealing adapter 6. The nozzle 3 is fixed to the rotary joint 5 through the positioning hole and the positioning pin 8, and is connected to the motor through the gear set to achieve rotation. The spray angle can be adjusted within the range of 0-360 degrees, and the inside of the housing 1 can be blown and cleaned. The limit blocks on both sides of the outer wall of the rotary joint 5 control the angle; The outer ring of the spiral blade 2 is in contact with the inner ring of the auxiliary spiral blade 9. The flexible scraper ring 10 of the outer ring of the auxiliary spiral blade 9 has a contact pressure of 0.2-0.5Mpa with the inner wall of the casing 1. The brush is in contact with the inner wall of the casing 1. When the spiral blade 2 rotates, the auxiliary spiral blade 9 and the flexible scraper ring 10 rotate accordingly to scrape off the dust on the inner wall of the casing 1. The torque sensor 44 on the transmission chain monitors the transmission torque. The vibration motor 21 works to make the casing 1 vibrate, which helps to remove dust.

[0042] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A screw conveyor for bag dust collector with dust discharge and self-cleaning function, characterized in that: It comprises a casing (1), a spiral blade (2), an air blowing assembly and an inlet and outlet material adjustment assembly, wherein the spiral blade (2) is fixedly mounted in the center of the casing (1), the air blowing assembly is fixedly mounted in the axial direction on the inner wall of the casing (1), and the inlet and outlet material adjustment assembly is fixedly mounted on the side of the outer wall of the casing (1); The air blowing assembly comprises a nozzle (3), an air inlet interface (4) and a rotary joint (5); the air inlet of the nozzle (3) is connected to the rotary joint (5) via a sealing adapter (6); a sealing ring (7) is placed in the middle of the sealing adapter (6); the air inlet end of the rotary joint (5) is connected to the air outlet end of the air inlet interface (4) via a thread; the air inlet interface (4) is connected to an external compressed air source via an air pipe; a positioning hole is provided around the air inlet of the nozzle (3); a positioning pin (8) is fixedly installed at the connecting portion of the nozzle (3) and the rotary joint (5); the rotating shaft of the nozzle (3) is connected to the output shaft of the motor via a gear set; and limit units are fixedly installed on both sides of the outer wall of the rotary joint (5); The outer ring of the spiral blade (2) contacts and cooperates with the inner ring of the auxiliary spiral blade (9); the outer ring of the auxiliary spiral blade (9) is fixedly connected with a flexible scraper ring (10); one side of the flexible scraper ring (10) is arranged along the radial direction of the auxiliary spiral blade (9); and the end of the flexible scraper ring (10) contacts and cooperates with the inner wall of the casing (1).

2. The screw conveyor for bag dust collector with dust discharge and self-cleaning function according to claim 1, characterized in that: The upper end of the outer wall of the casing (1) is provided with a feed inlet (12), and the lower end of the outer wall of the casing (1) is provided with a discharge port (13). The outer wall edges of the feed inlet (12) and the discharge port (13) are fixedly installed with a gland structure, and the gland structure is respectively fixedly connected to the feed inlet (12) and the discharge port (13) with a rubber sealing gasket (14). The four corners on both sides of the bottom of the outer wall of the casing (1) are fixedly installed with an upper support (17) by bolts, and the bottom of the outer wall of the upper support (17) is fixedly installed with a coil spring (18), and the bottom of the outer wall of the coil spring (18) is fixedly installed with a lower support (19); A connecting seat (20) is fixedly mounted on the side surface of the outer wall of the housing (1) by means of bolts, a vibration motor (21) is fixedly connected to the connecting seat (20) by means of bolts, and a rubber shock-absorbing pad (22) is fixedly mounted between the vibration motor (21) and the connecting seat (20).

3. The screw conveyor for bag dust collector with dust discharge and self-cleaning function according to claim 1, characterized in that: The spiral blade (2) adopts a combined spiral blade structure, and the combined spiral blade structure is designed as a variable pitch form. The variable pitch form adopts a gradually increasing pitch from the feed port (12) to the discharge port (13). The spiral blade (2) is divided into three sections, the first section has a feed end length of L1, the second section has a middle section length of L2, and the third section has a discharge end length of L3. The ash discharge amount Q, the material stacking density ρ, the feed end pitch P1 is the ash discharge amount divided by the product of the axial speed of the material at the feed end and the filling coefficient, the middle section pitch P2 is the ash discharge amount divided by the product of the axial speed of the material at the middle section and the filling coefficient, and the discharge end pitch P3 is the ash discharge amount divided by the product of the axial speed of the material at the discharge end and the filling coefficient; L1 is 1-1.5 times P1, L2 is 3-5 times P2, and L3 is 1.5-2 times P3; The ratio of the pitch of the third section discharge end to the diameter of the circle formed by the outermost edge of the spiral blade (2) is 1:1-1.2:1, and the ratio of the pitch of the first section feed end and the second section middle section to the diameter of the circle formed by the outermost edge of the spiral blade (2) is 0.8:1-1:

1.

4. The screw conveyor for bag dust collector with dust discharge and self-cleaning function according to claim 1, characterized in that: The casing (1) is in a U-shaped form, and the bottom of the U-shaped form facilitates the accumulation of concentrated waste. A drive assembly is fixedly mounted on one end of the outer wall of the casing (1), and a protective cover (15) is installed around the outer wall of the drive assembly. An inspection port (16) is provided at the connection of the outer wall of the casing (1). The outer wall of the spiral blade (2) is provided with a spiral pattern, and the spiral pattern is opposite to the material conveying direction. Guide plates (30) are fixedly mounted on both sides of the inner wall of the casing (1), and the outer wall of the guide plate (30) is fixedly mounted with an electric push rod and a control The control system controls the electric push rod through an electric signal, and the electric push rod drives the guide plate (30) through a mechanical force. The guide plate (30) is connected to the housing (1) through a connecting arm (38). The electric push rod is fixedly mounted on the top of the outer wall of the connecting arm (38). The guide plate (30) has an adjustable angle range of 0-45 degrees. The surface of the guide plate (30) is provided with an anti-stick coating, and the edge of the guide plate (30) is provided with a rubber sealing strip. The rubber sealing strip ensures that the guide plate (30) and the inner wall of the housing (1) are tightly matched.

5. The screw conveyor for bag dust collector with dust discharge and self-cleaning function according to claim 1, characterized in that: The outer wall corresponding to the second section of the casing (1) is provided with a first ash discharge port (23), the bottom end of the outer wall of the casing (1) is provided with a second ash discharge port (24), valves (25) are fixedly installed inside the first ash discharge port (23) and the second ash discharge port (24) via flanges, and the valve stem of the valve (25) is connected to the output shaft of the drive assembly; A flow sensor (31) is fixedly mounted on the inner walls of the first ash discharge port (23) and the second ash discharge port (24), a first pressure sensor (32) is fixedly mounted on the side surface of the outer wall of the nozzle (3), and a second pressure sensor (33) is fixedly mounted at the gap position between the spiral blade (2) and the casing (1).

6. The screw conveyor for bag dust collector with dust discharge and self-cleaning function according to claim 2, characterized in that: The feed port (12) adopts a double-layer structure, the outer layer is configured as a fixed feed hopper (27), and the inner layer is configured as a rotating adjustment cylinder (28). The rotating adjustment cylinder (28) is provided with a feed hole. A dust accumulation sensor (11) is fixedly installed on the inner wall of the casing (1) and the spiral blade (2) 5 meters away from the feed port (12). The dust accumulation sensor (11) transmits the dust accumulation situation to the control system through wireless communication technology. A material level sensor (26) is fixedly installed on the side of the outer wall of the feed port (12), and a semicircular collection groove (34) is fixedly installed below the end of the outer wall of the discharge port (13); An air suction port (29) is provided at the bottom of the outer wall of the casing (1). The air suction port (29) is connected to the negative pressure system of the bag filter through an air pipe. A filter screen is fixedly installed at the air suction port (29). The driving component drives the rotating adjustment cylinder (28) through a gear transmission. The feed hole is in the shape of a long strip, and the length direction of the feed hole forms an angle of 30-60 degrees with the direction of material movement.

7. The screw conveyor for bag dust collector with dust discharge and self-cleaning function according to claim 1, characterized in that: A strain gauge (35) is embedded inside the spiral blade (2), a displacement sensor (36) is fixedly installed at each connection of the spiral blade (2), sealing rings (39) are fixedly installed at both ends of the spiral blade (2), an elastic sealing rubber layer is sandwiched in the middle of the sealing ring (39), and an annular groove (40) corresponding to the sealing ring (39) is provided at both ends of the inner wall of the housing (1), the annular groove (40) is composed of concentric circles, and a sealing cover (41) is wrapped around the outer side of the annular groove (40); An annular support frame (42) is fixedly installed below the outer walls of the feed port (12) and the discharge port (13); the width of the annular support frame (42) below the feed port (12) is 1 / 3 to 1 / 2 of the diameter of the first section of the spiral blade (2), and the height is 1 / 2 to 2 / 3 of the height of the spiral blade (2); the width of the annular support frame (42) below the discharge port (13) is 1 / 4 to 1 / 3 of the diameter of the third section of the spiral blade (2), and the height is 1 / 3 to 1 / 2 of the height of the spiral blade (2).

8. The screw conveyor for bag dust collector with dust discharge and self-cleaning function according to claim 1, characterized in that: The output shaft of the motor is fixedly mounted with a permanent magnet (37), the two ends of the spiral blade (2) are fixedly mounted with a drive shaft (43), and the transmission chain between the drive shaft (43) and the drive assembly is fixedly mounted with a torque sensor (44); The flexible scraper ring (10) is made of rubber with a hardness of 65-85 Shore A and a thickness of 3-8 mm. The contact pressure between the flexible scraper ring (10) and the inner wall of the housing (1) is 0.2-0.5 MPa. A brush is embedded in the bottom of the outer wall of the flexible scraper ring (10).

9. The screw conveyor for bag dust collector with dust discharge and self-cleaning function according to claim 4, characterized in that: The control system integrates signal inputs of a flow sensor (31), a first pressure sensor (32), a second pressure sensor (33), a strain gauge (35), a displacement sensor (36), a torque sensor (44) and a material level sensor (26). The control system comprises a main controller, a data acquisition module, a signal processing module and an execution control module. The main controller acquires the sensor signals in real time through the data acquisition module. After the signals are analyzed and processed by the signal processing module, the execution control module issues a control instruction to the actuator. An emergency stop instruction is provided inside the control system.

10. The screw conveyor for bag dust collector with dust discharge and self-cleaning function according to claim 1, characterized in that: The casing (1) is made of wear-resistant steel, and the inner wall is coated with an anti-stick coating. The spiral blade (2) is made of alloy steel, and the surface is hardened. The gap between the spiral blade (2) and the casing (1) is controlled within a range of 2-5 mm. The spray angle of the nozzle (3) is adjusted within a range of 0-360 degrees. The execution control module is connected to the vibration motor (21) via a data line, and the limit unit uses a limit block to control the angle.

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