Pneumatic baking soda conveying device

Abstract

The invention discloses a baking soda pneumatic conveying device, which belongs to the technical field of pneumatic conveying and comprises a platform plate, a treatment box is arranged on the middle side of the platform plate, a gas conveying pipe is arranged in the middle of the treatment box, a Roots gas blower is arranged on one side of the platform plate, the other end of the gas conveying pipe is connected with a discharge pipe, and one end of the discharge pipe is connected with a powder discharge pipe. A gas conveying pipe is arranged on the top of the treatment box, an exhaust pipe is rotationally arranged on the gas conveying pipe in a sealed mode, a powder loading box is arranged on one side of the top of the treatment box, a particle crushing mechanism is arranged at the bottom of the powder loading box, the gas inlet end of the second electromagnetic gas valve is connected with a quick-release type filtering gas inflation mechanism, the quick-release type filtering mechanism is connected with a pressure gas tank, and a control mechanism is further arranged on the treatment box. The air blowing device can effectively weaken the influence of powder blocks formed by baking soda powder on pneumatic conveying, and when the density of the baking soda powder in the air blowing pipeline is large, auxiliary air blowing power is provided.

Description

Technical Field

[0001] The invention belongs to the technical field of pneumatic conveying, and in particular relates to a baking soda pneumatic conveying device. Background Art

[0002] Baking soda, also known as sodium bicarbonate, is a common raw material for food processing and industrial production. After large-scale processing, it needs to be dried first and then discharged into the silo. When packaging in batches, pneumatic conveying devices are often used to discharge the baking soda stored in the silo through pipes to the powder drying equipment. After drying, it is packaged.

[0003] The advantages of using a pneumatic conveying device to transport the baking soda powder in the silo to the powder drying equipment are: the equipment occupies a small area, some areas can be unmanned, and the labor cost investment is reduced. Secondly, dry nitrogen is used as the pneumatic medium. The entire conveying process is carried out in the pipeline, which can effectively prevent the baking soda powder from getting damp. Secondly, it can also prevent the dirt in the factory environment from mixing with the baking soda powder, thereby ensuring the product quality.

[0004] The existing device for pneumatic conveying of baking soda is a Roots air blower that provides a pneumatic power source. The discharge pipe of the nitrogen generator is connected to the air filter pipe of the Roots air blower. The air filter element in the air filter pipe is arranged to dehumidify and filter the discharged chlorine gas. Finally, the chlorine gas is pressurized by the Roots air blower and discharged into the air blowing pipe. After the flap valve of the pipe at the bottom of the silo is opened, the baking soda powder will enter the air blowing pipe, and the baking soda powder in the air blowing pipe will be discharged to the powder drying equipment through the powder discharge pipe by the high-speed high-pressure air.

[0005] However, although this type of pneumatic conveying equipment can quickly convey baking soda powder blocks to the drying equipment, it also has many defects: first, the baking soda powder stored in the silo is squeezed by the high weight and the air inside it, which inevitably causes the baking soda powder in some areas to form powder blocks and directly enter the air blowing pipeline. Although it can be gradually pulverized under high-speed wind force, when the amount is large, it is easy to cause instantaneous blockage in the air blowing pipeline, which has a certain impact on the air transmission smoothness of the air blowing pipeline and the material discharge speed of the silo. Secondly, some undamaged powder blocks will directly enter the drying equipment and are more likely to flow into the packaging bag without effective drying; secondly, if the density of baking soda powder in the air blowing pipeline is large, the high-speed wind force generated by the Roots air blower at this time will weaken the air force provided for the transportation of baking soda powder in the air transmission pipe of the subsequent stage. At this time, the continuous transportation of the air blowing pipeline of the previous stage will increase the operating load of the Roots air blower.

[0006] To this end, it is necessary to set up a pneumatic conveying device that uses a Roots air blower to provide the main air blowing power, effectively weaken the influence of the powder lumps formed by baking soda powder on pneumatic conveying, and provide auxiliary air blowing power when the density of baking soda powder in the air blowing pipeline is large. Summary of the invention

[0007] The purpose of the present invention is to provide a baking soda pneumatic conveying device to solve the problems existing in the prior art.

[0008] To achieve the above object, the present invention provides the following technical solution: a baking soda pneumatic conveying device, comprising a platform plate, a processing box is arranged on the middle side of the platform plate, a gas transmission pipe is arranged in the middle of the processing box, a Roots air blower is arranged on one side of the platform plate, an exhaust end of the Roots air blower is connected to an electromagnetic air valve 1, and one end of the electromagnetic air valve 1 is connected to the other end of the gas transmission pipe; The other end of the gas pipeline is connected to a discharge pipe, one end of the discharge pipe is connected to a powder discharge pipe, a discharge pipe is provided on the gas pipeline in a sealing and rotatable manner, a powder loading box is provided on one side of the top of the processing box, a particle crushing mechanism is provided at the bottom of the powder loading box, and the particle crushing mechanism is used to pulverize the lumps existing in the baking soda powder discharged into the powder loading box, and discharge the lumps into the gas pipeline through the discharge pipe; A level meter is provided on one side of the powder loading box, and the level meter is used to sense the powder level of baking soda powder in the powder loading box; a flap valve is connected to the top of the powder loading box, and the feed end of the flap valve is connected to the bottom of the silo through a discharge pipe; A powder concentration sensor is provided at the bottom of the discharge pipe, and the powder concentration sensor is used to sense the concentration of baking soda discharged into the discharge pipe. An air guide sheet is provided at the upper inner part of the discharge pipe, and the upper end of the discharge pipe is connected to a pipe, and one end of the pipe is connected to an electromagnetic valve 2, and the air inlet end of the electromagnetic valve 2 is connected to a quick-detachable filter and inflation mechanism, and the quick-detachable filter mechanism is connected to a pressure gas tank; the quick-detachable filter and inflation mechanism is used to receive the air pressure value in the pressure gas tank in real time, filter the air discharged from the external compressed gas station, and inflate the pressure gas tank, as well as switch its double filtering setting; The processing box is also provided with a control mechanism, which is used to receive external control signals to control the operation of the Roots air blower and the electromagnetic valve, and control the operation of the flap valve, the particle crushing mechanism and the electromagnetic valve by analyzing the powder level signal input by the level meter and the powder concentration signal input by the powder concentration sensor; and control the inflation of the pressure gas tank and the switching of its double filtration setting by receiving and analyzing the air pressure value input in real time by the quick-detachable filter mechanism.

[0009] Compared with the prior art, the present invention has the following beneficial effects: The baking soda pneumatic conveying device of the present invention breaks baking soda powder blocks into powder through its particle breaking mechanism, and then discharges it to the air transmission pipe, thereby weakening the influence of baking soda powder blocks in the silo on the pneumatic conveying, and under the control of the control mechanism, the particle breaking speed of the particle breaking mechanism can be automatically increased when the discharge volume of baking soda powder is affected; the quick-detachable filtering and inflating mechanism cooperates with the control mechanism to realize automatic inflation of the pressure gas cylinder, and can realize automatic switching of the double filtering setting of the quick-detachable filtering and inflating mechanism without affecting the inflation; the control mechanism controls the electromagnetic gas valve to open the second valve, so that the high-pressure nitrogen in the pressure gas cylinder is instantly discharged downward, providing auxiliary air blowing power, ensuring that the air force in the powder discharge pipe is sufficient, and the baking soda powder inside is more effectively discharged quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 The main schematic diagram of the present invention is Figure 2 for Figure 1 A partial cutaway diagram of Figure 3 for Figure 2 An enlarged structural diagram of the medium particle crushing mechanism; Figure 4 for Figure 3 The enlarged structural diagram at a in the middle; Figure 5 A top view of the quick-change filter and inflation mechanism of the present invention; Figure 6 It is a schematic cross-sectional view of the filter cartridge of the present invention; Figure 7 This is a schematic diagram of the connection of each module in the development board of the present invention.

[0011] In the figure: 1 platform plate, 2 treatment box, 3 air pipe, 4 Roots air blower, 5 electromagnetic air valve 1, 6 row pipe, 7 row powder pipe, 8 support pipe, 9 sealed bearing, 10 discharge pipe, 11 powder loading box, 12 bearing 1, 13 scraper, 14 guide head, 15 scraper, 16 rotary bucket, 17 sieve hole, 18 support needle rod, 19 side scraper, 20 transmission box, 21 gear 1, 22 gear 2, 23 motor, 24 material level meter, 25 flap valve, 26 discharge pipe, 27 pipe, 28 electromagnetic air valve 2 , 29 three-way one, 30 electronic barometer, 31 pressure gas tank, 32 three-way, 33 electromagnetic gas valve three, 34 inlet pipe, 35 filter cartridge, 36 sealing ring, 37 crimping plate, 38 air filter element, 39 insertion pipe, 40 row of holes, 41 connecting pipe, 42 air hose, 43 support rod, 44 support plate, 45 electric telescopic rod, 46 connecting plate, 47 protection box, 48 development board, 49 driver, 50 integrated relay, 101 air guide plate, 102 powder concentration sensor, 103 industrial computer. DETAILED DESCRIPTION

[0012] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0013] See also Figure 1 , Figure 2 A pneumatic conveying device for baking soda, characterized in that it comprises a platform plate 1, a processing box 2 is fixed by bolts on the middle side of the platform plate 1, a gas transmission pipe 3 is fixed by bolts in the middle of the processing box 2, a Roots gas blower 4 is fixed by bolts on the left side of the platform plate 1, a filter air pipeline of the Roots gas blower 4 is flange-connected to a discharge pipeline of a nitrogen generator, an exhaust end flange of the Roots gas blower 4 is flange-connected to an air inlet end of an electromagnetic gas valve 5, and an exhaust end flange of the electromagnetic gas valve 5 is flange-connected to the left end of the gas transmission pipe 3; The right end flange of the gas pipeline 3 is connected to the discharge pipe connected to the left side of the discharge pipe 6. The discharge pipe 6 is a right-angle pipe with a discharge pipe integrally arranged on the left side. The right end flange of the discharge pipe 6 is connected to the powder discharge pipe 7. The right end of the powder discharge pipe 7 is connected to the feed pipe of the feed bin of the external air-blowing dryer. The gas pipeline 3 is sealed and rotatably provided with a discharge pipe 10. The left side of the top of the processing box 2 is bolted to fix the powder loading box 11. The bottom of the powder loading box 11 is provided with a granulation mechanism. The granulation mechanism is used to pulverize the lumps existing in the baking soda discharged into the powder loading box 11, and discharge them into the gas pipeline 3 through the discharge pipe 10. The baking soda powder blocks are broken into powder by the granulation mechanism and then discharged to the air pipeline 3, thereby weakening the influence of the baking soda powder blocks in the silo on the pneumatic conveying.

[0014] The upper and lower parts of the left side of the powder loading box 11 are screwed with a level meter 24, which is used to sense the powder level of baking soda in the powder loading box 11; the top flange of the powder loading box 11 is connected to a flap valve 25, which is a stepper motor driven electric flap valve, and the feed end of the flap valve 25 is connected to the bottom of the silo through a discharge pipe 26; When both the upper material level meter 24 and the lower material level meter 24 sense the baking soda layer, this is a valve closing signal for controlling the flap valve 25. When the lower material level meter 24 instantly loses the sensing of the baking soda layer, this is a valve opening signal for controlling the flap valve 25. When the flap valve 25 opens, the baking soda in the silo will quickly fall into the powder loading box 11.

[0015] The bottom of the discharge pipe 6 is screwed with a powder concentration sensor 102, which is used to sense the concentration of baking soda discharged into the discharge pipe 6. The upper inner wall of the discharge pipe 6 is bolted to fix an air guide plate 101, which is an arc-shaped plate with a 30-degree bend at the bottom, and is used to obliquely block and discharge the lower gas of the upper part of the discharge pipe 6 to the right end of the gas; the upper end flange of the discharge pipe 6 is connected to the pipe 27, and the upper end flange of the pipe 27 is connected to the outlet end of the electromagnetic valve 28, and the inlet end of the electromagnetic valve 28 is connected to a quick-detachable filter and inflation mechanism, and the quick-detachable filter mechanism is connected to a pressure gas tank 31; the quick-detachable filter and inflation mechanism is used to receive the air pressure value in the pressure gas tank 31 in real time, filter the air discharged from the external compressed gas station, and inflate the pressure gas tank 31, as well as switch its double filtering setting; The quick-detachable filter and inflation mechanism can realize the switching of dual filter settings, so as to avoid affecting the normal filtering and inflation use when changing one of the filter settings; and during the inflation process, the control mechanism monitors and analyzes the change in air pressure value per unit time, so as to determine whether the currently used filter setting meets the inflation filtration requirements. If not, the filter setting will be switched immediately, and the quick-detachable filter and inflation mechanism will be controlled to quickly remove the problematic filter setting to facilitate the replacement of filter consumables. When the air pressure value is lower than the threshold range, the pressure gas tank 31 will be inflated immediately, and when the air pressure value is higher than the threshold range, the pressure gas tank 31 will be stopped from being inflated immediately; A control mechanism is also installed on the processing box 2, and the control mechanism is used to receive external control signals to control the operation of the Roots air blower 4 and the electromagnetic valve 5, and control the operation of the flap valve 25, the particle crushing mechanism and the electromagnetic valve 28 by analyzing the powder level signal input by the level meter 24 and the powder concentration signal input by the powder concentration sensor 102; and control the inflation of the pressure gas tank 31 and the switching of its double filtering setting by receiving and analyzing the air pressure value input in real time by the quick-detachable filtering mechanism.

[0016] When the powder concentration received by the powder concentration sensor 102 is lower than the set powder concentration threshold, and the time from the upper level meter 24 losing the sensing layer signal to the lower level meter 24 losing the sensing layer signal exceeds the calibration time, the control mechanism will control the particle crushing mechanism to accelerate the operation, thereby speeding up the process of crushing the powder blocks. When the powder concentration received by the powder concentration sensor 102 is higher than the set powder concentration threshold, the control mechanism will control the particle crushing mechanism to decelerate.

[0017] See also Figure 2 A support pipe 8 is seamlessly welded to the upper left side of the gas transmission pipe 3, a sealing bearing 9 is provided in the support pipe 8 through interference sealing, and the inner ring of the sealing bearing 9 is inserted into the discharge pipe 10 through interference sealing.

[0018] Under such a configuration, not only can the discharge pipe 10 be stably rotated in the support pipe 8 , but the baking soda in the powder loading box 11 can be discharged into the gas pipeline 3 through the support pipe 8 .

[0019] See also Figure 2 , Figure 3 and Figure 4 The crushing mechanism includes a bearing 12 inserted into the bottom of the powder loading box 11 with interference sealing, a discharge pipe 10 inserted into the inner ring of the bearing 12 with interference sealing, a seamlessly welded rotary bucket 16 at the upper end of the discharge pipe 10 penetrating into the powder loading box 11, a shaft groove is provided on the inner wall of the powder loading box 11, a sealing shaft ring is provided on the inner wall of the shaft groove, and the inner ring of the sealing shaft ring is inserted into the middle outer edge of the rotary bucket 16 with interference sealing, and the rotary bucket 16 is an upper and lower double-conical circular bucket structure; sieve holes 17 are evenly arranged on the top of the rotary bucket 16, and the mesh number of the sieve holes 17 is set to 80 meshes; The scraper blade 13 is fixed by bolts on four sides of the powder loading box 11, and the guide head 14 is welded between the tops of the scraper blades 13. The guide head 14 is a conical structure. A cylinder is integrally set at the top center of the rotary bucket 16, and a bearing groove is set at the bottom center of the guide head 14. The support bearing is inserted into the bearing groove with interference fit, and the cylinder is inserted into the inner ring of the support bearing. The guide head 14 forms an upper rotation support for the rotation of the rotary bucket 16, making the high-speed rotation of the rotary bucket 16 more stable. The bottom of the scraper blade 13 is provided with scraping teeth 15, and the distance between adjacent scraping teeth 15 is 0.1 mm, and the distance between the tooth tip of each scraping tooth 15 and the upper surface of the rotary bucket 16 is 0.02 mm. Therefore, when the swivel bucket 16 rotates at a high speed, the baking soda powder in the lower part of the powder loading box 11 is moved by the swivel bucket 16, and under the limitation of the scraper 13, the baking soda powder is arranged at a high speed on the upper part of the swivel bucket 16, and under the guidance of the scraper teeth 15 at the lower part of the scraper blade 13, the baking soda powder quickly passes through the sieve holes 17 and is discharged into the swivel bucket 16, and the baking soda powder blocks are quickly pulverized by the scraper teeth 15, and are also discharged into the sieve bucket 16 through the sieve holes 17.

[0020] The gas transmission pipe 3 is internally threaded with a support needle rod 18, which is a round rod structure with a needle head arranged at the upper end. The support needle rod 18 penetrates the discharge pipe 10 to the rotary bucket 16, and a side scraper 19 is evenly arranged in an annular direction at one end of the support needle rod 18 that penetrates the rotary bucket 16. The side scraper 19 is a V-shaped piece, and the gap between the side scraper 19 and the inner wall of the rotary bucket 16 is set to 0.01 mm. When the swirl bucket 16 rotates at a high speed, the side scrapers 19 can scrape off the baking soda accumulated on the inner wall of the swirl bucket 16 , so that the baking soda in the swirl bucket 16 can be effectively discharged into the discharge pipe 10 .

[0021] The bottom bolts of the powder loading box 11 are fixed to the transmission box 20, and the discharge pipe 10 penetrates into one end of the transmission box 20 and is connected to the gear one 21 through an interference key. The bottom right side of the transmission box 20 is bolted to the motor 23, and the motor 23 is a stepping motor. The rotor shaft of the motor 23 penetrates into one end of the transmission box 20 and is connected to the gear two 22 through an interference key, and the gear two 22 meshes with the gear one 21.

[0022] When the motor 23 is running, the gear 2 22 drives the gear 1 21 to rotate, thereby driving the discharge pipe 10 and the rotary bucket 16 to rotate.

[0023] See also Figure 1 , Figure 2 , Figure 5 and Figure 6 The quick-detachable filter-inflating mechanism includes a three-way 29 flange-connected to the air inlet end of the electromagnetic air valve 28, the upper end of the three-way 29 is flange-connected to the electronic barometer 30, and the air connection end of the electronic barometer 30 is flange-connected to the air inlet pipe end of the pressure gas tank 31; The electronic barometer 30 is used to monitor the pressure of the high-pressure nitrogen in the pressure gas tank 31. When the electromagnetic gas valve 28 is opened, the high-pressure nitrogen in the pressure gas tank 31 is instantly filled into the discharge pipe 6 to provide auxiliary power for pneumatic transportation.

[0024] The right end flange of the three-way 1 29 is connected to the three-way 2 32, and the two end flanges of the three-way 2 32 are connected to the electromagnetic valve 33. The air inlet end flange of the electromagnetic valve 33 is connected to the access pipe 34, and the access pipe 34 is flange-connected to the left end of the filter cartridge 35. A sealing ring groove 36 is provided at the right end of the filter cartridge 35. The sealing ring 36 is bonded with a sealing adhesive in the sealing ring groove. The material of the sealing ring 36 is chloroprene rubber, and the sealing ring 36 is tightly pressed on the pressing plate 37. The pressing plate 37 is a circular plate structure with a flange connection pipe arranged at the center position of one end. In addition, a pressing convex ring is integrally arranged on the outer edge of the left end of the pressing plate 37. An air filter element 38 is filled in the filter cartridge 35. The air filter element 38 is a ceramic air filter element for filtering impurities and removing water. The air filter element 38 is an insertion tube 39 arranged at one end of the pressing plate 37, and the insertion tube 39 is inserted into the air filter element 38. The insertion tube 39 is evenly provided with rows of holes 40. The right end flange of the crimping plate 37 is connected to the exhaust end of the electromagnetic valve 33, the air inlet flange of the electromagnetic valve 33 is connected to the connecting pipe 41, and the connecting pipe 41 is inserted into the air hose 42 through interference fit, the air hose 42 is clamped with a throat clamp, the air hose 42 is connected to the external compressed gas station, the air inlet end of the compressed gas station is connected to the exhaust end of the gas dryer, and the air inlet end of the gas dryer is connected to the exhaust end of the nitrogen generator; Therefore, when one of the electromagnetic valves 33 is opened, the compressed nitrogen is quickly discharged into the pressure gas tank 31, thereby filling the pressure gas tank 31.

[0025] It is worth noting that the capacity of the pressure gas tank 31 is 800L. The pressure gas tank 31 is a carbon fiber high-pressure gas tank with a maximum bearing pressure of 22MPa.

[0026] A support rod 43 is welded to the middle side of the three-way two 32 and the right end of the support rod 43 is bolted to the support plate 44. The two sides of the support plate 44 are bolted to the electric telescopic rod 45. The electric telescopic rod 45 is a stepper motor driven electric telescopic rod. The top rod of the electric telescopic rod 45 passes through the support plate 44 and is bolted to the support plate 46. The support plate 46 is integrally arranged on the crimping plate 37.

[0027] When the two electromagnetic air valves 33 on either side of the front and rear are closed, the top rod of the electric telescopic rod 45 on that side extends out, thereby driving the crimping plate 37 to break away from the pressure on the sealing ring 36, and the insertion tube 39 to escape from the air filter element 38. At this time, the air filter element 38 can be removed from the filter cartridge 35, and a new air filter element 38 can be filled into the filter cartridge 35. The top rod of the electric telescopic rod 45 retracts, thereby driving the insertion tube 39 to be pressed tightly into the inner groove of the air filter element 38, and the convex ring of the crimping plate 37 presses the concave sealing ring 36, thereby ensuring the sealing performance of the crimping plate 37 and the filter cartridge 35.

[0028] After being dried by the gas dryer, the nitrogen is discharged into the insertion pipe 39 through the compressed gas station, and then discharged into the gas filter element 38 through the evenly arranged discharge holes 40. After being filtered and impurities removed by the gas filter element 38, the nitrogen is discharged, thereby making the nitrogen injected into the pressure gas tank 31 purer.

[0029] See also Figure 1 and Figure 2 The control mechanism includes a protection box 47 fixed by bolts on the right side of the processing box 2, a development board 48 fixed by screws using insulating pads in the protection box 47, a driver 49 and an integrated relay 50 fixed by bolts on the left side of the processing box 2, three drivers 49 arranged front to back, and an industrial computer 103 fixed by screws on the front of the processing box 2.

[0030] Among them, the power cord of the Roots air blower 4 is connected to the lower wiring pile of the external relay, the upper wiring pile of the external relay is connected to the external power supply, and the wiring terminal of the external relay coil is connected to the power control terminal of the integrated relay 50 through a cable, and the main power supply of the integrated relay 50 is connected to the external power supply; the control terminal of the solenoid valve 1 5, the solenoid valve 2 28 and the solenoid valve 3 33 is connected to the power control terminal of the integrated relay 50 through a cable; the power controlled end of the stepper motor of the flap valve 25 is connected to the power control input end of a driver through a cable, the power controlled end of the motor 23 is connected to the power control input end of a driver through a cable, and the power controlled ends of the two electric telescopic rods 45 are connected to the power control output end of a driver through a cable, and the main power input ends of all drivers are connected to the external power supply through cables.

[0031] See also Figure 7 , a control module is provided on the development board 48, and the control module includes an air pressure value receiving module, a material level signal receiving module and a dust concentration signal receiving module. The air pressure value receiving module is used to receive the air pressure data input by the electronic barometer 30 in real time, and the signal access pin of the air pressure value receiving module is connected to the signal line of the electric barometer 30 through a cable; the material level signal receiving module is used to receive the signal of the material level meter 24 in real time, and the signal line of the material level meter 24 is connected to the signal access pin of the material level signal receiving module; the dust concentration signal receiving module is used to receive the powder concentration data input by the powder concentration sensor 102 in real time, and the signal access pin of the dust concentration signal receiving module is connected to the transmission line of the powder concentration sensor 102; The air pressure value receiving module, the material level signal receiving module and the dust concentration signal receiving module are connected to the analysis and processing module, and the analysis and processing module is connected to the control signal receiving module. The control signal receiving module is used to receive the control signal input from the industrial computer 103 in real time. The signal output end of the industrial computer 103 is connected to the signal input pin of the control signal receiving module through a signal line; In addition, the driver and integrated relay control programs are loaded into the industrial computer 103, and a control protocol is reached with the control signal receiving module. Therefore, temporary operation instructions can be issued to the drive control module, the speed control module, the relay control module 1, the relay control module 2, the relay control module 3 and the steering speed control module through the industrial computer 103. Under the judgment of the analysis and processing module, the instructions issued by the industrial computer 103 are priority instructions.

[0032] The analysis and processing module is connected to the drive control module, the speed control module, the relay control module 1, the relay control module 2, the relay control module 3 and the steering speed control module. The analysis and processing module is used to receive the air pressure data, and when the air pressure data reaches the set air pressure threshold, it issues an instruction to the relay control module 3 to turn on and off the power supply of the electromagnetic air valve 3 33, wherein the air pressure threshold is divided into a low value S and a high value H, S is 9MPa, and H is 20MPa. When the air pressure data reaches S, a relay control instruction to turn on the electromagnetic air valve 3 33 is issued to the relay control module 3, and when the air pressure data reaches H, a relay control instruction to turn on the electromagnetic air valve 3 33 is issued to the relay control module 3. The control module 3 issues a relay control instruction to disconnect the electromagnetic valve 33, thereby controlling the quick-detachable filter inflation mechanism to inflate the pressure gas tank 31 and stop running; according to the change of the air pressure data per unit time, the steering speed control module issues an operation instruction to the electric telescopic rods 45 on both sides, thereby controlling the quick-detachable filter inflation mechanism to switch to double filter gas, and the analysis and processing module stores a calibrated boost speed interval of VI-VT / min. When the air pressure data is within 20 consecutive minutes and the boost speed is at VI-VT / min, no operation instruction is issued to the steering speed control module, and when the air pressure data is within 20 consecutive minutes and the boost speed is at VI-VT / min, no operation instruction is issued to the steering speed control module. If the pressure increase rate is lower than VI / min for 2 minutes in a row within 20 minutes, it indicates that there is filter blockage, and an operation instruction is issued to the steering speed control module. When the operation instruction is executed, the push rod extension operation instruction is not issued to the electric telescopic rod 45 on the side where no filter blockage occurs, and the push rod extension operation instruction is issued to the electric telescopic rod 45 on the side where filter blockage occurs. Before executing the operation instruction, if there is no inflation state, it is necessary to first obtain the threshold condition that the valve closing instruction of the solenoid valve 33 on the side where the filter blockage occurs is executed. If it is in the inflation state, in addition to obtaining the filter blockage occurrence, In addition to the threshold condition that the electromagnetic valve 33 closing command on the gas side has been executed, it is also necessary to obtain the threshold condition that the electromagnetic valve 33 opening command on the gas side without filter blockage has been executed, so that the electric telescopic rod 45 push rod extension command can be issued on the filter blockage side; the analysis and processing module is also used to receive and analyze the occurrence of the level meter signal and issue an operation command to the drive control module, thereby controlling the opening and closing operation of the flap valve 25; by analyzing the powder concentration data, a speed change control command is issued to the speed control module, thereby controlling the particle crushing mechanism to adjust the operating speed, where the basic powder concentration value is R g / m 3 , where R is the rated concentration of baking soda powder transported by Roots air blower 4 at standard speed under unit cross-sectional area and length of powder discharge pipe 7; when the real-time powder concentration E is ≥R g / m for 1 minute continuously 3 When the real-time powder concentration E is less than R g / m for 1 minute, no speed change control command is issued. 3 When E is lower than R by 40g / m 3When the speed is increased by 0.4r / s, the maximum speed limit of the deceleration is 28r / s. When the maximum speed limit is reached, the speed increase command is not issued. Under such a setting, when the amount of powder discharged is low, the speed of the crushing mechanism can be increased, the powder block processing in the baking soda powder can be accelerated, and the baking soda powder can be sieved and dropped; and it is also used to issue the opening and closing command of the electromagnetic valve 28 to the relay control module 2, wherein, when the real-time powder concentration E exceeds R g / m 3 ≥200g / m 3 When the relay control module 2 is turned on, a valve opening command for the electromagnetic valve 28 is issued to the relay control module 2; The analysis and processing module is also connected to a control signal receiving module, which is used to receive the control signal sent by the industrial computer 103 in real time, and analyze and process the control signal type through the analysis and processing module, and issue temporary control instructions to the drive control module, the speed control module, the relay control module 1, the relay control module 2, the relay control module 3 and the steering speed control module; Among them, the signal output pins of the drive control module, the speed control module and the steering speed control module are respectively connected to the signal input end of a driver 49 through signal lines, and the signal output pins of the relay control module 1, the relay control module 2 and the relay control module 3 are respectively connected to the signal access ends of the integrated relay 50 corresponding to the control of the solenoid valve 1 5, the solenoid valve 2 28 and the solenoid valve 3 28 through signal lines.

[0033] The relay control module 1 is used to control the opening and closing of the electromagnetic gas valve 5. Under the control of the analysis and processing module, before the relay control module issues a valve closing instruction, the integrated relay must first receive the industrial computer 103 to close the Roots gas blower 4 instruction. After a delay of 4 seconds, the relay control module can issue a valve closing instruction. When there is no Roots gas blower 4 closing instruction, the valve closing instruction issued by the relay control module is always intercepted by the analysis and processing module; and before the integrated relay receives the industrial computer 103 to start the Roots gas blower 4 instruction, it must first receive the electromagnetic gas valve 5 opening instruction issued by the industrial computer 103 to the relay control module. 2 seconds after the valve opening instruction is issued, the integrated relay can issue the starting Roots gas blower 4 instruction. Before there is the electromagnetic gas valve 5 opening instruction, the starting Roots gas blower 4 instruction issued by the industrial computer 103 is always intercepted by the analysis and processing module.

[0034] The working principle of this embodiment is as follows: Crushing mechanism: The baking soda powder blocks are crushed into powder by the crushing mechanism and then discharged to the air pipeline 3, thereby weakening the influence of the baking soda powder blocks in the silo on the pneumatic conveying; Quick-detachable filter inflation mechanism and control mechanism: The quick-detachable filter inflation mechanism can realize the switching of dual filter settings, so as to avoid affecting the normal filtering and inflation use when changing one of the filter settings; and during the inflation process, the control mechanism monitors and analyzes the change in air pressure value per unit time, so as to determine whether the currently used filter setting meets the inflation filtration requirements, and cooperates with the control mechanism to control it, and automatically inflate and cut off the pressure gas tank 31.

[0035] Particle crushing mechanism, powder concentration sensor 102 and control mechanism: The control mechanism receives and analyzes the real-time powder concentration input by the powder concentration sensor 102, thereby controlling the running speed of the particle crushing mechanism. When the amount of powder discharged is low, the running speed of the particle crushing mechanism can be increased, thereby accelerating the processing of powder lumps in baking soda and promoting the baking soda to pass through the sieve and fall.

[0036] Solenoid valve 28, control mechanism, powder concentration sensor 102 and pressure gas tank 31: When the powder concentration obtained by the control mechanism in real time exceeds the rated powder concentration of 200g / m 3 At this time, a command to open the electromagnetic valve 28 is sent to the relay control module 2, so that the high-pressure nitrogen in the pressure gas tank 31 is instantly discharged, providing auxiliary air blowing power to ensure that there is sufficient air force in the powder discharge pipe 7, and the baking soda inside it is more effectively discharged quickly.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A baking soda pneumatic conveying device, characterized in that: It comprises a platform plate (1), a processing box (2) is arranged on the middle side of the platform plate (1), a gas transmission pipe (3) is arranged in the middle of the processing box (2), a Roots air blower (4) is arranged on one side of the platform plate (1), an exhaust end of the Roots air blower (4) is connected to an electromagnetic air valve (5), and one end of the electromagnetic air valve (5) is connected to the other end of the gas transmission pipe (3); The other end of the gas pipeline (3) is connected to a discharge pipe (6), one end of the discharge pipe (6) is connected to a powder discharge pipe (7), a discharge inlet pipe (10) is provided on the gas pipeline (3) in a sealed and rotatable manner, a powder loading box (11) is provided on one side of the top of the processing box (2), and a granulation mechanism is provided at the bottom of the powder loading box (11), the granulation mechanism is used to pulverize lumps in the baking soda discharged into the powder loading box (11), and discharge the lumps into the gas pipeline (3) through the discharge inlet pipe (10); A level meter (24) is provided on one side of the powder loading box (11), and the level meter (24) is used to sense the powder level of baking soda powder in the powder loading box (11); a flap valve (25) is connected to the top of the powder loading box (11), and the feed end of the flap valve (25) is connected to the bottom of the silo via a discharge pipe (26); A powder concentration sensor (102) is provided at the bottom of the discharge pipe (6), and the powder concentration sensor (102) is used to sense the concentration of baking soda discharged into the discharge pipe (6). An air guide sheet (101) is provided at the upper inner portion of the discharge pipe (6). The upper end of the discharge pipe (6) is connected to a pipe (27), one end of the pipe (27) is connected to a second electromagnetic valve (28), the air inlet end of the second electromagnetic valve (28) is connected to a quick-detachable filter and air-charging mechanism, and the quick-detachable filter and air-charging mechanism is connected to a pressure gas tank (31); the quick-detachable filter and air-charging mechanism is used to receive the air pressure value in the pressure gas tank (31) in real time, filter the air discharged from the external compressed air station, and inflate the pressure gas tank (31), as well as switch the dual filtering setting thereof; The processing box (2) is also provided with a control mechanism, which is used to receive external control signals to control the operation of the Roots air blower (4) and the electromagnetic valve 1 (5), and to control the operation of the flap valve (25), the particle crushing mechanism and the electromagnetic valve 2 (28) by analyzing the powder level signal input by the material level meter (24) and the powder concentration signal input by the powder concentration sensor (102); and to control the inflation of the pressure gas tank (31) and the switching of the double filtering setting thereof by receiving and analyzing the air pressure value input in real time by the quick-detachable filtering mechanism.

2. A baking soda pneumatic conveying device according to claim 1, characterized in that: The gas transmission pipe (3) is connected to a support pipe (8), a sealing bearing (9) is arranged inside the support pipe (8), and an inner ring of the sealing bearing (9) is provided with a discharge pipe (10).

3. A baking soda pneumatic conveying device according to claim 2, characterized in that: The granulation mechanism comprises a bearing (12) arranged at the bottom of the powder loading box (11), a discharge pipe (10) arranged on the inner ring of the bearing (12), one end of the discharge pipe (10) penetrating into the powder loading box (11) is connected to a rotating bucket (16), and sieve holes (17) are evenly arranged on the upper surface of the rotating bucket (16); Scrapers (13) are fixedly installed on four sides of the powder loading box (11), a guide head (14) is connected between the tops of the scrapers (13), the top of the rotary bucket (16) is rotatably arranged at the bottom of the guide head (14), and scraping teeth (15) are provided at the bottom of the scrapers (13); A support needle rod (18) is connected to the gas transmission pipe (3), and the support needle rod (18) penetrates the discharge pipe (10) to the rotary bucket (16). Side scrapers (19) are evenly arranged in a circumferential direction at one end of the support needle rod (18) that penetrates the rotary bucket (16); A transmission box (20) is arranged at the bottom of the powder loading box (11); a gear 1 (21) is arranged at one end of the discharge pipe (10) that penetrates into the transmission box (20); a motor (23) is arranged at one side of the bottom of the transmission box (20); a rotor shaft of the motor (23) penetrates through one end of the transmission box (20) and is connected to a gear 2 (22); the gear 2 (22) meshes with the gear 1 (21).

4. A baking soda pneumatic conveying device according to claim 3, characterized in that: The quick-detachable filtering and inflating mechanism comprises a three-way valve (29) connected to one end of the electromagnetic valve (28), one end of the three-way valve (29) is connected to an electronic pressure gauge (30), and the air connection end of the electronic pressure gauge (30) is connected to a pressure gas tank (31); The other end of the three-way one (29) is connected to the three-way two (32), and the two ends of the three-way two (32) are connected to the electromagnetic valve three (33). The air inlet end of the electromagnetic valve three (33) is connected to the filter cartridge (35) through the inlet pipe (34). A sealing ring (36) is provided at one end of the filter cartridge (35), and a pressing plate (37) is tightly pressed on the sealing ring (36). An air filter element (38) is provided in the filter cartridge (35). An insertion tube (39) is provided at one end of the pressing plate (37), and the insertion tube (39) is inserted into the air filter element (38). The insertion tube (39) is evenly provided with rows of holes (40); The other end of the crimping plate (37) is provided with a connecting pipe (41), and the connecting pipe (41) is connected to an external compressed gas station via an air connection hose (42); A support rod (43) is connected to one side of the three-way connection (32), and a support plate (44) is provided at one end of the support rod (43). Electric telescopic rods (45) are provided on both sides of the support plate (44). The top rod of the electric telescopic rod (45) passes through the support plate (44) and is connected to a supporting plate (46). The supporting plate (46) is connected to the crimping plate (37).

5. A baking soda pneumatic conveying device according to claim 4, characterized in that: The control mechanism comprises a protection box (47) disposed on one side of a processing box (2), a development board (48) disposed in the protection box (47), a driver (49) and an integrated relay (50) disposed on the other side of the processing box (2), and an industrial computer (103) disposed at the front of the processing box (2).

6. A baking soda pneumatic conveying device according to claim 5, characterized in that: The development board (48) is provided with a control module, the control module comprising an air pressure value receiving module, a material level signal receiving module and a dust concentration signal receiving module, the air pressure value receiving module is used to receive in real time the air pressure data input by the electronic barometer (30), the material level signal receiving module is used to receive in real time the signal of the material level meter (24), and the dust concentration signal receiving module is used to receive in real time the powder concentration data input by the powder concentration sensor (102); The air pressure value receiving module, the material level signal receiving module and the dust concentration signal receiving module are connected to an analysis and processing module, and the analysis and processing module is connected to a control signal receiving module, and the control signal receiving module is used to receive a control signal input from an industrial computer (103) in real time; The analysis and processing module is connected to the drive control module, the speed control module, the relay control module 1, the relay control module 2, the relay control module 3 and the steering speed control module. The analysis and processing module is used to receive air pressure data and, when the air pressure data reaches a set air pressure threshold, to issue an instruction to the relay control module 3 to switch on and off the power supply of the electromagnetic valve 3 (33), thereby controlling the quick-detachable filter inflation mechanism to inflate and stop the pressure gas tank (31). According to the change of the air pressure data per unit time, the steering speed control module issues an operation instruction to the electric telescopic rods (45) on both sides, thereby controlling the quick-detachable filter inflation mechanism to switch between dual filter gases. The analysis and processing module is also used to receive and analyze the occurrence of the material level meter signal and issue an operation instruction to the drive control module, thereby controlling the flap valve (25) to open and close. By analyzing the powder concentration data, the speed control module issues a speed change control instruction, thereby controlling the particle crushing mechanism to adjust the operating speed. The module is also used to issue an opening and closing instruction to the electromagnetic valve 2 (28) to the relay control module 2. The analysis and processing module is also connected to a control signal receiving module, the control signal receiving module is used to receive a control signal sent by the industrial computer (103) in real time, and analyze and process the control signal type through the analysis and processing module, and issue temporary control instructions to the drive control module, the speed control module, the relay control module 1, the relay control module 2, the relay control module 3 and the steering speed control module; The relay control module 1 is used to control the opening and closing of the electromagnetic valve 1 (5).

Images