Spiral conveyor with ash self-cleaning function for bag-type dust collector

Abstract

The application discloses a spiral conveyor with ash discharging and self-cleaning functions for a bag-type dust collector and relates to the technical field of environmental engineering. The application discloses a spiral conveyor with ash discharging and self-cleaning functions for a bag-type dust collector and relates to the technical field of environmental engineering. The application discloses a spiral conveyor with ash discharging and self-cleaning functions for a bag-type dust collector and relates to the technical field of environmental engineering. The application discloses a spiral conveyor with ash discharging and self-cleaning functions for a bag-type dust collector and relates to the technical field of environmental engineering. The application discloses a spiral conveyor with ash discharging and self-cleaning functions for a bag-type dust collector and relates to the technical field of environmental engineering. The application discloses a spiral conveyor with ash discharging and self-cleaning functions for a bag-type dust collector and relates to the technical field of environmental engineering. The application discloses a spiral conveyor with ash discharging and self-cleaning functions for a bag-type dust collector and relates to the technical field of environmental engineering. The application discloses a spiral conveyor with ash discharging and self-cleaning functions for a bag-type dust collector and relates to the technical field of environmental engineering. The application discloses a spiral conveyor with ash discharging and self-cleaning functions for a bag-type dust collector and relates to the technical field of environmental engineering. The application discloses a spiral conveyor with ash discharging and self-cleaning functions for a bag-type dust collector and relates to the technical field of environmental engineering. The application discloses a spiral conveyor with ash discharging and self-cleaning functions for a bag-type dust collector

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of environmental engineering, in particular to a spiral conveyor with dust discharging and self-cleaning function for bag-type dust collector. BACKGROUND

[0002] The bag-type dust collector is a dry dust filtering device. With the continuous improvement of people's environmental protection awareness, the control requirements for dust emission in industrial production are becoming more and more stringent. As a high-efficiency dust removal equipment, the bag-type dust collector has been widely used in various industries, thereby driving the market demand for related equipment such as spiral conveyors. In order to meet the environmental protection requirements, enterprises must install high-efficiency bag-type dust collectors and supporting spiral conveyors to handle the dust generated in the production process. Under the promotion of environmental protection concept, the treatment of industrial dust is no longer limited to emission control, but also focuses on the recycling of useful substances in the dust.

[0003] With the development of technology, the performance of the bag-type dust collector, such as the handling air volume and dust removal efficiency, is continuously improved. However, there are still some problems in the dust discharging process, such as the accumulation and blockage of dust in the dust discharging device, which affects the normal operation and dust removal efficiency of the dust collector. The traditional spiral conveyor has the problems of easy blockage and difficult cleaning when conveying dust and other powdery materials. Moreover, the conveying capacity of the spiral conveyor is generally fixed, and when the bag-type dust collector collects a large amount of dust, it cannot meet the demand for rapid dust discharging.

[0004] Therefore, it is necessary to provide a spiral conveyor with dust discharging and self-cleaning function for bag-type dust collector to solve the problems in the background.

[0005] 1. Patent document CN115848948B discloses a self-cleaning spiral conveyor. The patent realizes full-automatic closed cleaning of the spiral conveyor without the need for disassembly and cleaning, solves the problem of manual disassembly and cleaning of the spiral conveyor, greatly reduces the cleaning difficulty, and reduces the labor intensity of cleaning. However, the patent cannot realize the function of dust discharging and self-cleaning.

[0006] 2. Patent document CN103057918B discloses a spiral conveyor for automatic atomization humidification and dust suppression for cigarettes. The patent realizes full functions of the spiral conveyor, high automation degree, good control precision, reasonable and compact structure, simple operation, high visualization degree, and convenient information parameter control, effectively solves the problems of clean production and on-site environmental protection, and is beneficial to the physical and mental health of workers. However, the patent cannot realize the function of uniform adjustment of material in and out.

[0007] 3. Patent document CN114275473B discloses a stem blending screw conveyor device. The existing stem blending screw conveyor device cannot be conveniently moved and placed stably, affecting the transportation convenience and processing stability of the device, and does not have a self-cleaning function, and the device content can easily leave a small amount of tobacco, which cannot meet the user's processing needs. However, the above-mentioned patent cannot realize environmental protection sealing.

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

[0009] In summary, the above-mentioned patents cannot realize the functions of uniform adjustment of material in and out, environmental protection sealing, intelligent operation and maintenance, and dust self-cleaning, resulting in waste accumulation, complex manual cleaning operation, uneven material conveying, blockage, dust leakage, impurity pollution, and untimely fault handling.

[0010] Therefore, the present application provides a screw conveyor for bag-type dust collector which can realize the functions of uniform adjustment of material in and out, environmental protection sealing, intelligent operation and maintenance, and dust self-cleaning. SUMMARY

[0011] The present application aims to provide a screw conveyor for bag-type dust collector with dust self-cleaning function, to solve the technical problems of being unable to realize the functions of uniform adjustment of material in and out, environmental protection sealing, intelligent operation and maintenance, and dust self-cleaning, resulting in waste accumulation, complex manual cleaning operation, uneven material conveying, blockage, dust leakage, impurity pollution, and untimely fault handling.

[0012] To achieve the above-mentioned purpose, the present application provides the following technical solution: a screw conveyor for bag-type dust collector with dust self-cleaning function, comprising a machine shell, a spiral blade, a gas blowing assembly and an in-out material adjusting assembly, the machine shell is internally centrally fixedly installed with a spiral blade, the machine shell inner wall is fixedly installed with a gas blowing assembly along the axial direction, and the machine shell outer wall side is fixedly installed with an in-out material assembly.

[0013] The air blowing assembly comprises a nozzle, an air inlet interface and a rotary joint, the air inlet of the nozzle is connected with the rotary joint through a sealing adapter, a sealing ring is arranged in the middle of the sealing adapter, the air inlet end of the rotary joint is connected with the air outlet end of the air inlet interface through threads, the air inlet interface is connected with an external compressed air source through an air pipe, positioning holes are arranged around the air inlet of the nozzle, a positioning pin is fixedly installed on the connecting part of the nozzle and the rotary joint, the rotating shaft of the nozzle is connected with the output shaft of the motor through a gear set, and a limiting unit is fixedly installed on the two sides of the outer wall of the rotary joint.

[0014] The outer ring of the spiral blade is in contact with the inner ring of the auxiliary spiral blade, the outer ring of the auxiliary spiral blade is fixedly connected with a flexible scraping ring, one side of the flexible scraping ring is arranged along the radial direction of the auxiliary spiral blade, and the end of the flexible scraping ring is in contact with the inner wall of the shell.

[0015] Preferably, the outer wall of the shell is provided with an inlet at the upper end and an outlet at the lower end, the outer wall edges of the inlet and the outlet are fixedly installed with gland structures, the gland structures are fixedly connected with rubber sealing gaskets between the inlet and the outlet, respectively, and the outer wall bottom of the shell is fixedly installed with an upper support at the four corners on both sides, the outer wall bottom of the upper support is fixedly installed with a spiral spring, and the outer wall bottom of the spiral spring is fixedly installed with a lower support.

[0016] The outer wall side of the shell is fixedly installed with a connecting seat through bolts, the connecting seat is fixedly connected with a vibration motor through bolts, and a rubber damping pad is fixedly installed between the vibration motor and the connecting seat.

[0017] Preferably, the spiral blade adopts a combined spiral blade structure, the combined spiral blade structure is designed in a variable pitch form, the variable pitch form gradually increases from the inlet to the outlet, the spiral blade is divided into three sections, the length of the first section is L1, the length of the second section is L2, the length of the third section is L3, the ash discharge Q, the material bulk density ρ, the pitch P1 of the inlet end is the product of the ash discharge and the axial velocity of the material at the inlet end and the filling coefficient, the pitch P2 of the middle section is the product of the ash discharge and the axial velocity of the material at the middle section and the filling coefficient, and the pitch P3 of the outlet end is the product of the ash discharge and the axial velocity of the material at the outlet end and the filling coefficient.

[0018] L1 is 1-1.5 times P1, L2 is 3-5 times P2, and L3 is 1.5-2 times P3.

[0019] The ratio of the pitch of the third section outlet 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 inlet 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.

[0020] Preferably, the shell shape adopts a U shape, the bottom of the U shape is easy to concentrate waste accumulation, one end of the outer wall of the shell is fixedly provided with a driving assembly, the outer wall of the driving assembly is circumferentially provided with a protective cover, the connecting part of the outer wall of the shell is provided with an access hole, the outer wall of the spiral blade is provided with a spiral pattern, the spiral pattern is opposite to the material conveying direction, the inner wall of the shell is fixedly provided with guide plates on both sides, the outer wall of the guide plate is connected with the control system through the fixedly provided electric push rod, the control system controls the electric push rod through electric signals, the electric push rod drives the guide plate through mechanical force, the guide plate is connected with the shell through a connecting arm, the outer wall of the top of the connecting arm is fixedly provided with an electric push rod, the adjusting angle range of the guide plate is 0-45 degrees, the surface of the guide plate is provided with an anti-sticking coating, 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 matched with the inner wall of the shell.

[0021] Preferably, the second section of the shell is provided with a first ash discharge opening on the corresponding outer wall, and a second ash discharge opening is formed at the bottom end of the outer wall of the shell, and a valve is fixedly installed in the first ash discharge opening and the second ash discharge opening through flanges;

[0022] A flow sensor is fixedly installed on the inner wall of the first ash discharge opening and the second ash discharge opening, a first pressure sensor is fixedly installed on the outer wall side of the nozzle, and a second pressure sensor is fixedly installed at the gap position between the spiral blade and the shell.

[0023] Preferably, the feeding port adopts a double-layer structure, the outer layer is provided as a fixed feeding hopper, and the inner layer is provided as a rotating adjusting cylinder, the rotating adjusting cylinder is provided with a feeding hole, a dust accumulation sensor is fixedly installed on the inner wall of the shell and the spiral blade at a distance of 5 meters from the feeding port, the dust accumulation sensor transmits the dust accumulation condition to the control system through wireless communication technology, a material level sensor is fixedly installed on the outer wall side of the feeding port, and a semicircular collecting groove is fixedly installed below the end of the outer wall of the discharging port;

[0024] An air outlet is formed at the bottom of the outer wall of the shell, the air outlet is connected with the negative pressure system of the bag-type dust collector through an air pipe, a filter screen is fixedly installed at the air outlet, the driving assembly drives the rotating adjusting cylinder through gear transmission, the feeding hole is in the shape of a long strip, and the length direction of the feeding hole forms an angle of 30-60 degrees with the material movement direction.

[0025] Preferably, the spiral blade is embedded with a strain gauge, a displacement sensor is fixedly installed at each connecting part of the spiral blade, sealing rings are fixedly installed at both ends of the spiral blade, an elastic sealing rubber layer is clamped in the middle of the sealing ring, annular grooves corresponding to the sealing rings are arranged at both ends of the inner wall of the shell, the annular grooves are composed of concentric circles, and the outer side of the annular grooves is wrapped with a sealing cover;

[0026] The outer wall below the feeding port and the discharging port is fixedly provided with an annular support frame, the annular support frame below the feeding port has a width of 1 / 3-1 / 2 of the diameter of the first section of the spiral blade and a height of 1 / 2-2 / 3 of the height of the spiral blade, and the annular support frame below the discharging port has a width of 1 / 4-1 / 3 of the diameter of the third section of the spiral blade and a height of 1 / 3-1 / 2 of the height of the spiral blade.

[0027] Preferably, the output shaft of the motor is fixedly provided with a permanent magnet, the two ends of the spiral blade are fixedly provided with driving shafts, and a torque sensor is fixedly arranged on the transmission chain between the driving shafts and the driving assembly.

[0028] The flexible scraping ring is made of rubber material, has a hardness value of 65-85 Shore A, and a thickness of 3-8 mm, the contact pressure between the flexible scraping ring and the inner wall of the shell is 0.2-0.5 Mpa, and the outer wall of the flexible scraping ring is embedded with a brush.

[0029] Preferably, the control system integrates the signal inputs of a flow sensor, a first pressure sensor, a second pressure sensor, a strain gauge, a displacement sensor, a torque sensor and a material level sensor, and comprises a main controller, a data acquisition module, a signal processing module and an execution control module; the main controller acquires the signals of the sensors in real time through the data acquisition module, analyzes and processes the signals through the signal processing module, and sends control instructions to the execution mechanism through the execution control module; and the control system is internally provided with an emergency stop instruction.

[0030] Preferably, the shell is made of wear-resistant steel material, the inner wall is coated with an anti-sticking coating, the spiral blade is made of alloy steel and is subjected to hardening treatment, the gap between the spiral blade and the shell is controlled to be 2-5 mm, the spraying angle of the nozzle is adjusted within the range of 0-360 degrees, the execution control module is connected to the vibration motor through a data line, and the angle is controlled by a limiting block.

[0031] Compared with the prior art, the present application has the following advantages:

[0032] 1. The present application realizes the self-cleaning function of dust removal through the air blowing assembly and the flexible scraping ring, solves the problem of complex manual cleaning operation caused by waste accumulation, and efficiently removes dust to avoid secondary flying of dust in the dust collector.

[0033] 2. The present application realizes the function of uniform adjustment of material in and out through the combined spiral blade structure, solves the problem of blockage caused by uneven material conveying, helps to play the self-cleaning function of dust removal, and improves the stability and reliability of equipment operation.

[0034] 3. The present application realizes the environmentally friendly sealing function through the elastic sealing rubber layer, solves the problem of dust leakage and impurity pollution, protects the health of the operator, prolongs the service life of the equipment, and further saves the cost of equipment maintenance and replacement.

[0035] 4. The application realizes intelligent operation and maintenance through the integrated control system, solves the problem of untimely fault handling, and improves the automation degree of equipment and the continuity of production. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is a front view structural schematic diagram of the application;

[0037] Figure 2 It is a front view structural schematic diagram of the application;

[0038] Figure 3 It is a front view structural schematic diagram of the application;

[0039] Figure 4 It is a front view structural schematic diagram of the application;

[0040] Figure 5 It is a front view structural schematic diagram of the application;

[0041] Figure 6 It is a front view structural schematic diagram of the application;

[0042] Figure 7 It is a front view structural schematic diagram of the application.

[0043] In the figure: 1, the machine shell; 2, the spiral blade; 3, the nozzle; 4, the air inlet; 5, the rotary joint; 6, the sealing adapter; 7, the sealing ring; 8, the positioning pin; 9, the secondary spiral blade; 10, the flexible scraping ring; 11, the dust accumulation sensor; 12, the feeding port; 13, the discharging port; 14, the rubber sealing washer; 15, the protective cover; 16, the access hole; 17, the upper support; 18, the spiral spring; 19, the lower support; 20, the connecting seat; 21, the vibration motor; 22, the rubber damping pad; 23, the first dust outlet; 24, the second dust outlet; 25, the valve; 26, the material level sensor; 27, the feeding hopper; 28, the rotary adjusting cylinder; 29, the air outlet; 30, the guide plate; 31, the flow sensor; 32, the first pressure sensor; 33, the second pressure sensor; 34, the collection groove; 35, the strain gauge; 36, the displacement sensor; 37, the permanent magnet; 38, the connecting arm; 39, the sealing ring; 40, the annular groove; 41, the sealing cover; 42, the annular support frame; 43, the driving shaft; 44, the torque sensor. DETAILED DESCRIPTION

[0044] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of the present application.

[0045] In the description of the present application, 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 the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0046] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be broadly understood, for example, "connection" can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] Please refer to Figure 1 , Figure 2 and Figure 3 , the present application provides an embodiment: a spiral conveyor with ash self-cleaning function for bag type dust collector, including shell 1, spiral blade 2, air blowing assembly and feeding and discharging adjusting assembly, the inside center of the shell 1 is fixedly installed with spiral blade 2, the inner wall of the shell 1 is fixedly installed with air blowing assembly along the axial direction, the outer wall side of the shell 1 is fixedly installed with feeding and discharging assembly;The air blowing assembly comprises a nozzle 3, an air inlet 4 and a rotary joint 5, the air inlet of the nozzle 3 is connected with the rotary joint 5 through a sealing adapter 6, a sealing ring 7 is placed in the inside of the sealing adapter 6, the air inlet end of the rotary joint 5 is connected with the air outlet end of the air inlet 4 through threads, the air inlet 4 is connected with the external compressed air source through an air pipe, positioning holes are formed around the air inlet of the nozzle 3, positioning pins 8 are fixedly installed on the connecting part of the nozzle 3 and the rotary joint 5, the rotary shaft of the nozzle 3 is connected with the output shaft of the motor through a gear set, limiting units are fixedly installed on the outer wall of the rotary joint 5 on both sides;

[0048] The output shaft of the motor is fixedly installed with a permanent magnet 37, and the two ends of the helical blade 2 are fixedly installed with a driving shaft 43. A torque sensor 44 is fixedly installed on the transmission chain between the driving shaft 43 and the driving assembly. The flexible scraping ring 10 is made of rubber material, and the hardness value is 65-85 Shore A, and the thickness is 3-8 mm. The contact pressure between the flexible scraping ring 10 and the inner wall of the shell 1 is 0.2-0.5 Mpa, and the outer wall of the flexible scraping ring 10 is embedded with a brush;

[0049] 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 acquires the signals of the sensors in real time through the data acquisition module. After analysis and processing by the signal processing module, the execution control module sends control instructions to the actuator. The control system is internally provided with an emergency stop instruction.

[0050] Further, the driving assembly is started to drive the helical 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, sprays compressed air into the shell 1, and removes dust on the inner wall of the shell and the surface of the helical blade. The vibration motor 21 is started to reduce the adhesion of the material to the inner wall of the shell through 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 rotary adjusting cylinder 28 through the driving 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.

[0051] During operation, the flow sensor 31 monitors the dust discharge flow of the first dust discharge port 23 and the second dust 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 helical blade 2 and the shell 1, respectively. The strain gauge 35 and the displacement sensor 36 continuously monitor the stress and deformation of the helical blade 2. The torque sensor 44 monitors the torque of the driving shaft 43. The control system analyzes the signals of these sensors through the signal processing module.

[0052] If the flow sensor 31 detects abnormal dust discharge flow, the control system can adjust the opening of the valve 25. If the pressure sensor detects abnormal pressure, it indicates that there is a problem with the air blowing assembly or the gap between the helical blade 2 and the shell 1. The control system can issue an alarm or take appropriate adjustment measures. If the strain gauge 35 or the displacement sensor 36 detects abnormal deformation of the helical blade 2, or the torque sensor 44 detects excessive torque, the control system will trigger the emergency stop instruction to stop the equipment operation and avoid further damage.

[0053] Please refer to Figure 1 、 Figure 3 and Figure 5 , the present application provides an embodiment: a spiral conveyor with dust self-cleaning function for bag type dust collector, the outer wall side of the shell 1 is fixedly installed with a connecting seat 20 through bolts, the connecting seat 20 is fixedly connected with a vibration motor 21 through bolts, a rubber shock pad 22 is fixedly installed between the vibration motor 21 and the connecting seat 20;

[0054] The second section of the shell 1 corresponds to the outer wall opening a first dust outlet 23, the bottom end of the outer wall of the shell 1 is provided with a second dust outlet 24, the inside of the first dust outlet 23 and the second dust outlet 24 is fixedly installed with a valve 25 through flange, the valve rod of the valve 25 is connected with the output shaft of the driving assembly; the inner wall of the first dust outlet 23 and the second dust outlet 24 is fixedly installed with a flow sensor 31, the outer wall side of the nozzle 3 is fixedly installed with a first pressure sensor 32, the gap position between the spiral blade 2 and the shell 1 is fixedly installed with a second pressure sensor 33;

[0055] Further, first, the shell 1, the connecting seat 20, the vibration motor 21 and the rubber shock pad 22 are prepared. The connecting seat 20 is fixedly installed on the outer wall side of the shell 1 at the specified position through bolts.

[0056] Then, the rubber shock pad 22 is placed between the vibration motor 21 and the connecting seat 20, ensuring its position is accurate and can effectively reduce vibration. Then the vibration motor 21 and the connecting seat 20 are firmly connected using bolts, so that the vibration motor 21 is stably installed on the shell 1. This installation method can make the vibration generated by the vibration motor 21 during work be buffered through the rubber shock pad 22, reducing the influence on the shell 1 and other connected parts.

[0057] In the second section of the shell 1 corresponding to the outer wall position, a first dust discharge port 23 is accurately opened, and a second dust discharge port 24 is opened at the bottom end of the outer wall of the shell 1. A valve 25 is prepared and fixedly installed inside the first dust discharge port 23 and the second dust discharge port 24 through a flange. Ensure that the valve rod of the valve 25 is correctly connected with the output shaft of the driving assembly, so as to control the opening and closing of the valve 25 through the driving assembly, and install a flow sensor 31 on the inner wall of the first dust discharge port 23 and the second dust discharge port 24. The flow sensor 31 should be firmly installed, and the probe part thereof is accurately located in the fluid passage of the dust discharge port, so as to accurately measure the material flow during the dust discharge process. A first pressure sensor 32 is fixedly installed on the outer wall side of the nozzle 3. During installation, attention should be paid to the close contact between the sensor and the surface of the nozzle 3, so as to ensure that the pressure around the nozzle 3 during operation can be accurately measured, thereby reflecting the working state of the air blowing assembly. A second pressure sensor 33 is installed at the gap position between the helical blade 2 and the shell 1. Careful operation is required during installation to avoid interference with the normal rotation of the helical blade 2. The second pressure sensor 33 can monitor the pressure change between the helical blade 2 and the shell 1 in real time. When the pressure is abnormal, such as when the material accumulation causes the pressure to increase, information can be fed back in time to provide a basis for the operation state judgment and adjustment of the equipment.

[0058] Please refer to Figure 1 、 Figure 2 and Figure 7 , the present application provides an embodiment: a spiral conveyor with dust self-cleaning function for bag-type dust collector, the helical blade 2 adopts combined helical blade structure, the combined helical blade structure is designed in variable pitch form, the variable pitch form gradually increases from the feed port 12 to the discharge port 13, the helical 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 dust discharge amount Q, the material accumulation density ρ, the feed end pitch P1 is the product of the dust discharge amount and the feed end material axial velocity and the filling coefficient, the middle section pitch P2 is the product of the dust discharge amount and the middle section material axial velocity and the filling coefficient, the discharge end pitch P3 is the product of the dust discharge amount and the discharge end material axial velocity and the filling coefficient; L1 is 1-1.5 times P1, L2 is 3-5 times P2, 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 helical blade 2 is 1:1-1.2:1, 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 helical blade 2 is 0.8:1-1:1;

[0059] The outer wall below the feeding port 12 and the discharging port 13 is fixedly provided with an annular support frame 42, the annular support frame 42 below the feeding port 12 has a width of 1 / 3-1 / 2 of the diameter of the first section of the spiral blade 2 and a height of 1 / 2-2 / 3 of the height of the spiral blade 2, and the annular support frame 42 below the discharging port 13 has a width of 1 / 4-1 / 3 of the diameter of the third section of the spiral blade 2 and a height of 1 / 3-1 / 2 of the height of the spiral blade 2;

[0060] The shell 1 is made of wear-resistant steel material, the inner wall is coated with an anti-sticking coating, the spiral blade 2 is made of alloy steel and the surface is subjected to hardening treatment, the gap between the spiral blade 2 and the shell 1 is controlled to be 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 limiting unit adopts a limiting block to control the angle;

[0061] Further, the driving assembly is started to make the spiral blade 2 start rotating. The material enters from the feeding port 12, the double-layer structure of the feeding port 12 can adjust the feeding amount and feeding direction by driving the rotation adjustment cylinder 28 through the gear transmission of the driving assembly. In the material conveying process, the nozzle 3 of the air blowing assembly sprays air to the inner wall of the shell 1 according to the set spray angle to remove the possible dust attached. At the same time, the variable pitch design on the spiral blade 2 and the specific length of each section ensure that the material can be stably conveyed at different stages.

[0062] In the running process, the main controller of the control system acquires the sensor signals through the data acquisition module and analyzes and processes the signals through the signal processing module. The dust accumulation sensor 11 is used to monitor the dust accumulation condition, and if an abnormality is found, the spray parameters of the air blowing assembly or the vibration frequency of the vibration motor 21 can be adjusted through the execution control module. The material level sensor 26 is used to monitor the material level of the feeding port 12 to ensure stable feeding. At the same time, the strain gauge 35 inside the spiral blade 2 and the displacement sensor 36 at the connection of each section can monitor the stress and deformation of the spiral blade 2 in real time, and 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 sensors 31 in the first dust discharge port 23 and the second dust discharge port 24 can monitor the dust discharge condition, and the valve 25 can be used to control the dust discharge amount. The first pressure sensor 32 on the outer wall side of the nozzle 3 and the second pressure sensor 33 at the gap position between the spiral blade 2 and the shell 1 can monitor the air blowing pressure and the internal pressure condition to ensure the safe and stable operation of the equipment.

[0063] The material is conveyed to the discharging port 13 under the push of the spiral blade 2, and the discharged material is collected in the semicircular collecting groove 34 below the discharging port 13. The flexible scraper ring 10 is driven by the auxiliary spiral blade 9 to scrape the dust and residual material on the inner wall of the shell 1 along with the rotation of the spiral blade 2, realizing the self-cleaning function.

[0064] Please refer toFigure 1 、 Figure 3 and Figure 6 The application provides a spiral conveyor with ash self-cleaning function for a bag-type dust collector, a feeding port 12 is formed in the outer wall of a shell 1, a discharging port 13 is formed in the lower end of the outer wall of the shell 1, a gland structure is fixedly installed on the edge of the outer wall of the feeding port 12 and the discharging port 13, rubber sealing gaskets 14 are fixedly connected between the feeding port 12 and the discharging port 13 and the gland structure, four corners on the bottom of the outer wall of the shell 1 are fixedly installed with upper supports 17 through bolts, the bottom of the outer wall of the upper support 17 is fixedly installed with a spiral spring 18, and the bottom of the outer wall of the spiral spring 18 is fixedly installed with a lower support 19.

[0065] The feeding port 12 adopts a double-layer structure, an outer layer is provided with a fixed feeding hopper 27, and an inner layer is provided with a rotating adjusting cylinder 28, the rotating adjusting cylinder 28 is provided with a feeding hole, dust accumulation sensors 11 are fixedly installed on the inner wall of the shell 1 and the spiral blade 2, the dust accumulation sensors 11 transmit dust accumulation conditions to a control system through wireless communication technology, a material level sensor 26 is fixedly installed on the side surface of the outer wall of the feeding port 12, and a semicircular collecting groove 34 is fixedly installed below the tail end of the outer wall of the discharging port 13.

[0066] The shell 1 adopts a U-shaped form, waste materials are easily accumulated at the bottom of the U-shaped form, a driving assembly is fixedly installed at one end of the outer wall of the shell 1, a protective cover 15 is installed in a surrounding mode on the outer wall of the driving assembly, an inspection opening 16 is formed at the connecting position of the outer wall of the shell 1, the outer wall of the spiral blade 2 is provided with spiral lines, the spiral lines are opposite to the material conveying direction, guide plates 30 are fixedly installed on the two sides of the inner wall of the shell 1, the outer wall of the guide plate 30 is fixedly installed with an electric push rod connected with the control system, 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 with the shell 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 adjusting angle range of the guide plate 30 is 0-45 degrees, the surface of the guide plate 30 is provided with an anti-sticking coating, the edge of the guide plate 30 is provided with a rubber sealing strip, and the rubber sealing strip ensures that the guide plate 30 is tightly matched with the inner wall of the shell 1.

[0067] Further, materials enter the rotating adjusting cylinder 28 through the feeding hopper 27, the rotating adjusting cylinder 28 can adjust the position of the feeding hole according to needs, and certain control of the feeding amount and the feeding direction is realized. The material level sensor 26 monitors the material condition of the feeding port 12 in real time, and feeds back data to the control system.

[0068] The driving assembly is started to drive the helical blade 2 to rotate. Since the helical pattern on the outer wall of the helical blade 2 is opposite to the conveying direction of the material, the material is conveyed along the casing 1 to the discharge port 13 under the action of the helical blade 2. In the conveying process, the control system judges the dust accumulation on the casing 1 and the helical 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 casing 1. The anti-sticking coating and the rubber sealing strip of the guide plate 30 ensure good cooperation with the inner wall of the casing 1, avoiding material leakage and sticking.

[0069] The material is finally discharged through the discharge port 13 and falls into the semicircular collecting groove 34. Throughout the process, the rubber sealing ring 14 of the inlet port 12 and the discharge port 13 ensures the sealing of the equipment to prevent dust leakage. The U-shaped structure of the casing 1 facilitates the accumulation of waste at the bottom, facilitating subsequent cleaning, and the support and buffer structure of the equipment can effectively reduce vibration and displacement during equipment operation, ensuring stable operation of the equipment.

[0070] Please refer to Figure 1 , Figure 4 and Figure 6 , the present application provides an embodiment: a spiral conveyor with dust removal and self-cleaning function for bag-type dust collector, the outer ring of the helical blade 2 is in contact with the inner ring of the auxiliary helical blade 9, the outer ring of the auxiliary helical 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 helical blade 9, and the end of the flexible scraper ring 10 is in contact with the inner wall of the casing 1.

[0071] The strain gauge 35 is embedded in the helical blade 2, the displacement sensor 36 is fixedly installed at each connection position of the helical blade 2, the sealing ring 39 is fixedly installed at both ends of the helical blade 2, the elastic sealing rubber layer is clamped in the sealing ring 39, the annular grooves 40 corresponding to the sealing ring 39 are arranged at both ends of the inner wall of the casing 1, the annular grooves 40 are composed of concentric circles, and the sealing cover 41 is wrapped outside the annular grooves 40.

[0072] The suction port 29 is arranged at the bottom of the outer wall of the casing 1, the suction port 29 is connected with the negative pressure system of the bag-type dust collector through the air pipe, the filter screen is fixedly installed at the suction port 29, the driving assembly drives the rotary adjusting cylinder 28 through gear transmission, and the shape of the feeding hole is long strip-shaped.

[0073] Further, in the operation process of the spiral conveyor, the negative pressure system of the bag-type dust collector generates a suction effect in the casing 1 through the suction port 29, so that the dust and some small materials in the casing 1 are sucked into the bag-type dust collector, and the dust removal function is further enhanced. The filter screen can prevent material particles from entering the suction pipeline, avoiding damage to the negative pressure system.

[0074] At the feeding port, the driving assembly drives the rotary adjusting cylinder 28 through gear transmission. The feeding hole is long strip-shaped, and the length direction of the feeding hole is arranged at an angle of 30-60 degrees with the material movement direction during installation. This design can make the material more smoothly contact with the spiral blade 2 when entering the casing 1, and can adjust the feeding amount and feeding direction through the rotation of the rotary adjusting cylinder 28 according to the characteristics of the material and the feeding speed and other factors, so as to ensure that the material uniformly enters the inside of the screw conveyor for conveying.

[0075] 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, the sealing adapter 6, the nozzle 3 is fixed with the rotary joint 5 through the positioning hole and the positioning pin 8, and is connected with the motor through the gear set to realize rotation, the spraying angle can be adjusted within 0-360 degrees, and the inside of the casing 1 can be blown and cleaned. The limiting block on the outer wall of the rotary joint 5 controls the angle;

[0076] The outer circle of the spiral blade 2 is in contact with the inner circle of the auxiliary spiral blade 9, the flexible scraper ring 10 on the outer circle of the auxiliary spiral blade 9 is in contact with the inner wall of the casing 1 with a contact pressure of 0.2-0.5 Mpa, and 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, and the dust on the inner wall of the casing 1 is scraped off, the torque sensor 44 on the transmission chain monitors the transmission torque, and the vibration motor 21 works to vibrate the casing 1, which helps the dust to fall off.

[0077] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended to encompass all changes falling within the meaning and scope of the equivalent elements of the claims. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A screw conveyor for a bag-type dust collector having a self-cleaning function of discharging dust, characterized by: The utility model relates to a kind of screw feeder, including shell (1), spiral blade (2), air blowing assembly and in-and-out material adjusting assembly, the inside center fixed mounting of shell (1) spiral blade (2), air blowing assembly is fixedly installed in the inner wall of shell (1) along the axial direction, in-and-out material assembly is fixedly installed in the outer wall side of shell (1). The air blowing assembly includes nozzle (3), air inlet (4) and rotary joint (5), the air inlet of nozzle (3) is connected with rotary joint (5) by sealed adapter seat (6), the inside middle of sealed adapter seat (6) is placed with sealing ring (7), the air inlet of rotary joint (5) is connected with the air outlet of air inlet (4) by thread, air inlet (4) is connected with external compressed air source by air pipe, positioning hole is provided around the air inlet of nozzle (3), positioning pin (8) is fixedly installed in the connecting part of nozzle (3) and rotary joint (5), the rotary shaft of nozzle (3) is connected with the output shaft of motor by gear set, limiting unit is fixedly installed on the both sides of the outer wall of rotary joint (5). The outer ring of spiral blade (2) is in contact with the inner ring of auxiliary spiral blade (9), the outer ring of auxiliary spiral blade (9) is fixedly connected with flexible scraping ring (10), one side of flexible scraping ring (10) is arranged along the radial direction of auxiliary spiral blade (9), and the end of flexible scraping ring (10) is in contact with the inner wall of shell (1). The upper end of the outer wall of shell (1) is provided with feeding port (12), the lower end of the outer wall of shell (1) is provided with discharging port (13), the outer wall edges of feeding port (12) and discharging port (13) are fixedly installed with gland structure, the rubber sealing gasket (14) is fixedly connected between the gland structure and feeding port (12) and discharging port (13) respectively, the bottom of the outer wall of shell (1) is fixedly installed with upper support (17) at the four corners of the two sides, the bottom of the outer wall of upper support (17) is fixedly installed with helical spring (18), and the bottom of the outer wall of helical spring (18) is fixedly installed with lower support (19). The outer wall side of shell (1) is fixedly installed with connecting seat (20) by bolt, the connecting seat (20) is fixedly connected with vibration motor (21) by bolt, and the rubber shock pad (22) is fixedly installed between vibration motor (21) and connecting seat (20). The spiral blade (2) adopts combined spiral blade structure, the combined spiral blade structure is designed in variable pitch form, the variable pitch form gradually increases from feeding port (12) to discharging port (13), the spiral blade (2) is divided into three sections, the length of the first section feeding end is L1, the length of the second section middle section is L2, the length of the third section discharging end is L3, the ash discharge capacity Q, the material bulk density ρ, the feeding end pitch P1 is the product of ash discharge capacity, material axial velocity and filling coefficient, the middle section pitch P2 is the product of ash discharge capacity, middle section material axial velocity and filling coefficient, and the discharging end pitch P3 is the product of ash discharge capacity, discharging end material axial velocity and 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 helical 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 helical blade (2) is 0.8:1-1:1; The feed inlet (12) adopts a double-layer structure, the outer layer is provided as a fixed feed hopper (27), and the inner layer is provided as a rotating adjusting cylinder (28), the rotating adjusting cylinder (28) is provided with a feed hole, a dust accumulation sensor (11) is fixedly installed on the inner wall of the machine shell (1) and the helical blade (2) at a distance of 5 meters from the feed inlet (12), the dust accumulation sensor (11) transmits the dust accumulation condition to the control system through wireless communication technology, a material level sensor (26) is fixedly installed on the outer wall side of the feed inlet (12), and a semicircular collecting groove (34) is fixedly installed below the end of the outer wall of the discharge outlet (13); An air outlet (29) is formed in the bottom of the outer wall of the machine shell (1), the air outlet (29) is connected with the negative pressure system of the bag-type dust collector through an air pipe, a filter screen is fixedly installed at the air outlet (29), the driving assembly drives the rotating adjusting 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 material movement direction; The helical blade (2) is embedded with a strain gauge (35), a displacement sensor (36) is fixedly installed at each connection position of the helical blade (2), sealing rings (39) are fixedly installed at both ends of the helical blade (2), an elastic sealing rubber layer is clamped in the middle of the sealing ring (39), and annular grooves (40) corresponding to the sealing rings (39) are arranged at both ends of the inner wall of the machine shell (1); the annular groove (40) is composed of concentric circles, and a sealing cover (41) is wrapped outside the annular groove (40); Annular support frames (42) are fixedly installed below the outer walls of the feed inlet (12) and the discharge outlet (13), the width of the annular support frame (42) below the feed inlet (12) is 1 / 3-1 / 2 of the diameter of the first section of the helical blade (2), the height is 1 / 2-2 / 3 of the height of the helical blade (2), the width of the annular support frame (42) below the discharge outlet (13) is 1 / 4-1 / 3 of the diameter of the third section of the helical blade (2), and the height is 1 / 3-1 / 2 of the height of the helical blade (2).

2. The screw conveyor with ash self-cleaning function for the bag-type dust collector according to claim 1, characterized in that: The shell (1) is in the form of a U-shaped, the bottom of the U-shaped is easy to concentrate waste accumulation, the outer wall of the shell (1) is fixedly installed with a driving assembly, the outer wall of the driving assembly is installed with a protective cover (15) in a surrounding manner, the connecting part of the outer wall of the shell (1) is provided with an access hole (16), the outer wall of the spiral blade (2) is provided with spiral lines, the spiral lines are opposite to the material conveying direction, the inner wall of the shell (1) is fixedly installed with guide plates (30) on both sides, the outer wall of the guide plates (30) is connected with the control system through the fixed installation of an electric push rod, the control system controls the electric push rod through electric signals, the electric push rod drives the guide plates (30) through mechanical force, the guide plates (30) are connected with the shell (1) through connecting arms (38), the outer wall top of the connecting arms (38) is fixedly installed with an electric push rod, the adjustment angle range of the guide plates (30) is 0-45 degrees, the surface of the guide plates (30) is provided with an anti-sticking coating, the edge of the guide plates (30) is provided with a rubber sealing strip, and the rubber sealing strip ensures that the guide plates (30) are tightly matched with the inner wall of the shell (1).

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

4. The screw conveyor with ash self-cleaning function for the bag-type dust collector according to claim 1, characterized in that: The output shaft of the motor is fixedly installed with a permanent magnet (37), the two ends of the spiral blade (2) are fixedly installed with driving shafts (43), and the torque sensor (44) is fixedly installed on the transmission chain between the driving shafts (43) and the driving assembly. The flexible scraping ring (10) is made of rubber material, the hardness value is 65-85 shore A, the thickness is 3-8 mm, the contact pressure of the flexible scraping ring (10) and the inner wall of the shell (1) is 0.2-0.5 Mpa, and the outer wall bottom of the flexible scraping ring (10) is embedded with a brush.

5. The screw conveyor with ash self-cleaning function for the bag-type dust collector according to claim 4, characterized in that: 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 acquires the signals of the sensors in real time through the data acquisition module, analyzes and processes the signals through the signal processing module, and sends control instructions to the execution mechanism through the execution control module, and the control system is internally provided with an emergency stop instruction.

6. The screw conveyor with ash self-cleaning function for the bag-type dust collector according to claim 1, characterized in that: The machine shell (1) is made of wear-resistant steel material, the inner wall is coated with an anti-sticking coating, the material of the spiral blade (2) is alloy steel, the surface is subjected to hardening treatment, the gap between the spiral blade (2) and the machine shell (1) is controlled to be 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 with the vibration motor (21) through a data line, and the limiting unit adopts a limiting block to control the angle.

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