A soda ash pneumatic conveying device

Abstract

The present invention discloses a soda ash pneumatic conveying device, belonging to the technical field of pneumatic conveying. It includes a platform board, a processing box is arranged in the middle of the platform board, an air conveying pipe is arranged in the middle of the processing box, a Roots air blower is arranged on one side of the platform board, the other end of the air conveying pipe is connected with a discharge connecting pipe, one end of the discharge connecting pipe is connected with a powder discharge pipe, a discharge pipe is hermetically and rotatably arranged on the air conveying pipe, a powder loading box is arranged on one side of the top of the processing box, a crushing mechanism is arranged at the bottom of the powder loading box, the air inlet end of the electromagnetic air valve II is connected with a quick-release filtering and inflating mechanism, the quick-release filtering mechanism is connected with a pressure air tank, and a control mechanism is also arranged on the processing box. It can effectively weaken the influence of the powder blocks formed by soda ash powder on pneumatic conveying, and provide auxiliary air blowing power when the density of soda ash powder in the air blowing pipeline is relatively high.

Description

Technical Field

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

[0002] Baking soda, also known as sodium bicarbonate, is a commonly used raw material in food processing and industrial production. After large-scale processing, it needs to be dried first and then discharged into a silo. When performing batch packaging, a pneumatic conveying device is mostly used to discharge the baking soda powder stored in the silo through a pipeline to a powder drying device. After drying, packaging is carried out.

[0003] The advantages of using a pneumatic conveying device to transport baking soda powder from the silo to the powder drying device are as follows: The equipment occupies a small area, and some areas can be operated without human intervention, reducing the investment in labor costs. Secondly, using dry nitrogen as the medium of pneumatic force, the whole 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 pollution of the factory environment from mixing into the baking soda powder, ensuring the quality of the products.

[0004] In the existing device for pneumatic conveying of baking soda, the power source for providing pneumatic force is a Roots air blower. The discharge pipeline of the nitrogen generator is connected to the air filter pipeline of the Roots air blower. Through the setting of the air filter element in its air filter pipeline, the incoming chlorine gas is dehumidified and filtered. Finally, after the chlorine gas is pressurized by the Roots air blower, it is discharged into the air blowing pipeline. After the flap valve at the bottom of the silo pipeline is opened, the baking soda powder will enter the air blowing pipeline, and the baking soda powder in the air blowing pipeline is discharged to the powder drying device through the powder discharge pipe by high-speed and high-pressure air.

[0005] However, although this kind of pneumatic conveying equipment can quickly transport the baking soda powder to the drying equipment, it also has many defects: First, the baking soda powder stored in the silo is subjected to high weight extrusion and the air inside it, so it is inevitable that the baking soda powder in some areas forms lumps and directly enters the air blowing pipeline. Although it can be gradually pulverized under high-speed wind, when the amount is relatively large, it is easy to cause instantaneous blockage in the air blowing pipeline, which has a certain impact on the air transportation smoothness of the air blowing pipeline and the feeding speed of the silo. Secondly, some undamaged lumps will directly enter the drying equipment and are more likely to flow into the packaging bags without effective drying. Second, when the density of the baking soda powder in the air blowing pipeline is relatively large, the high-speed wind generated by the Roots air blower is weakened in providing pneumatic force for the transportation of the baking soda powder in the subsequent air transportation pipeline. At this time, under the continuous transportation of the front-stage air blowing pipeline, the operating load of the Roots air blower is increased.

[0006] Therefore, it is necessary to set up a pneumatic conveying device that uses a Roots air blower to provide the main air blowing power, effectively weakens the influence of the powder blocks formed by baking soda powder on pneumatic conveying, and provides auxiliary air blowing power when the density of baking soda powder in the air blowing pipeline is relatively high. 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 purpose, the present invention provides the following technical solution: A baking soda pneumatic conveying device includes a platform plate. A processing box is arranged in the middle of the platform plate. An air conveying pipe is arranged in the middle of the processing box. A Roots air blower is arranged on one side of the platform plate. The exhaust end of the Roots air blower is connected to an electromagnetic air valve I, and one end of the electromagnetic air valve I is connected to the other end of the air conveying pipe.

[0009] The other end of the air conveying pipe is connected to a discharge connecting pipe. One end of the discharge connecting pipe is connected to a powder discharge pipe. A discharge pipe is hermetically and rotatably arranged on the air conveying pipe. One side of the top of the processing box is provided with a powder loading box. A crushing mechanism is arranged at the bottom of the powder loading box. The crushing mechanism is used to pulverize the lumps existing in the baking soda powder discharged into the powder loading box and discharge them into the air conveying pipe through the discharge pipe.

[0010] A level gauge is arranged on one side of the powder loading box. The level gauge is used to sense the powder level height of the baking soda powder in the powder loading box. The top of the powder loading box is connected to a flap valve, and the feeding end of the flap valve is connected to the bottom of the silo through the discharge pipe.

[0011] A powder concentration sensor is arranged at the bottom of the discharge connecting pipe. The powder concentration sensor is used to sense the concentration of baking soda powder discharged into the discharge connecting pipe. Guide vanes are arranged in the upper part of the discharge connecting pipe. The upper end of the discharge connecting pipe is connected to a connecting pipe. One end of the connecting pipe is connected to an electromagnetic air valve II. The intake end of the electromagnetic air valve II is connected to a quick-release filtering and inflating mechanism. The quick-release filtering mechanism is connected to a pressure air tank. The quick-release filtering and inflating mechanism is used to receive the air pressure value in the pressure air tank in real time, filter the air discharged from the external compressed air station, inflate the pressure air tank, and switch its double-filtering setting.

[0012] A control mechanism is also arranged on the processing box. The control mechanism is used to receive external control signals and control the operation of the Roots air blower and the electromagnetic air valve, control the operation of the flap valve, the crushing mechanism, and the electromagnetic air valve II by analyzing the powder level signal input by the level gauge and the powder concentration signal input by the powder concentration sensor; control its inflation of the pressure air tank and the switching of its double-filtering setting by receiving and analyzing the air pressure value input by the quick-release filtering mechanism in real time.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] The baking soda pneumatic conveying device involved in the present invention crushes baking soda powder lumps into powder through its granulation mechanism and then discharges it into the pneumatic conveying pipe, thereby weakening the influence of the baking soda powder lumps in the silo on pneumatic conveying. Under the control of the control mechanism, it can automatically increase the granulation speed of the granulation mechanism when the discharge amount of baking soda powder is affected; the quick-disassembly filter inflation mechanism cooperates with the control mechanism to realize automatic inflation of the pressure gas tank, and can realize automatic switching and use of the double-filter setting of the quick-disassembly filter inflation mechanism without affecting inflation; the electromagnetic air valve two-way valve is controlled by the control mechanism, so that the high-pressure nitrogen in the pressure gas tank is instantaneously discharged downward, providing auxiliary air blowing power to ensure sufficient air power in the powder discharge pipe and more effectively discharging the baking soda powder inside it quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the front view schematic diagram of the present invention

[0016] Figure 2 is Figure 1 the partial sectional view schematic diagram of;

[0017] Figure 3 is Figure 2 the enlarged structural schematic diagram of the granulation mechanism in;

[0018] Figure 4 is Figure 3 the enlarged structural schematic diagram of the a position in;

[0019] Figure 5 is the top view of the quick-change filter inflation mechanism in the present invention;

[0020] Figure 6 is the sectional view schematic diagram of the filter cartridge in the present invention;

[0021] Figure 7 is the connection schematic diagram of each module in the development board of the present invention.

[0022] In the figure: 1 platform plate, 2 processing box, 3 air conveying pipe, 4 Roots air blower, 5 electromagnetic air valve I, 6 discharge connecting pipe, 7 powder discharge pipe, 8 support pipe, 9 sealed bearing, 10 inlet pipe, 11 powder loading box, 12 bearing I, 13 scraping blade, 14 guide head, 15 scraping tooth, 16 rotating bucket, 17 sieve hole, 18 support needle rod, 19 side scraping blade, 20 transmission box, 21 gear I, 22 gear II, 23 motor, 24 level gauge, 25 flap valve, 26 inlet pipe, 27 connecting pipe, 28 electromagnetic air valve II, 29 tee I, 30 electronic barometer, 31 pressure gas tank, 32 tee II, 33 electromagnetic air valve III, 34 inlet pipe, 35 filter cartridge, 36 sealing ring, 37 crimping disc, 38 air filter element, 39 insertion pipe, 40 discharge hole, 41 connecting pipe, 42 air connection hose, 43 support rod, 44 support plate, 45 electric telescopic rod, 46 support connecting plate, 47 protection box, 48 development board, 49 driver, 50 integrated relay, 101 air guiding blade, 102 powder concentration sensor, 103 industrial control computer. Detailed implementation manner

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0024] Refer to Figure 1 , Figure 2 , a sodium bicarbonate pneumatic conveying device, characterized in that: it includes a platform plate 1, a processing box 2 is bolted and fixed to the middle side of the platform plate 1, an air conveying pipe 3 is bolted and fixed to the middle of the processing box 2, a Roots air blower 4 is bolted and fixed to the left side of the platform plate 1, the air filter pipeline of the Roots air blower 4 is flange-connected to the discharge pipeline of the nitrogen generator, and the exhaust end of the Roots air blower 4 is flange-connected to the intake end of the electromagnetic air valve I 5, and the exhaust end of the electromagnetic air valve I 5 is flange-connected to the left end of the air conveying pipe 3;

[0025] The right end of the air conveying pipe 3 is flange-connected to the intake pipeline provided on the left side of the discharge connecting pipe 6 and communicated, the discharge connecting pipe 6 is a right-angle pipe with an intake pipeline integrally provided on the left side, the right end of the discharge connecting pipe 6 is flange-connected to the powder discharge pipe 7, and 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; an intake pipe 10 is rotatably sealed on the air conveying pipe 3, a powder loading box 11 is bolted and fixed to the left side of the top of the processing box 2, a crushing mechanism is provided at the bottom of the powder loading box 11, and the crushing mechanism is used to pulverize the lumps existing in the sodium bicarbonate powder discharged into the powder loading box 11 and discharge them into the air conveying pipe 3 through the intake pipe 10;

[0026] After the crushing mechanism pulverizes the sodium bicarbonate powder block into powder and then discharges it to the air conveying pipe 3, the influence of the sodium bicarbonate powder block in the silo on pneumatic conveying is weakened.

[0027] The upper left and lower parts of the powder loading box 11 are screwed with a level gauge 24, which is used to sense the powder level height of baking soda powder in the powder loading box 11; the top flange of the powder loading box 11 is connected to a flap valve 25, and the flap valve 25 is a stepping motor-driven electric flap valve. The feeding end of the flap valve 25 is connected to the bottom of the silo through a discharge pipe 26;

[0028] When both the upper level gauge 24 and the lower level gauge 24 sense the baking soda layer, this is the closed valve signal for controlling the flap valve 25. When the lower level gauge 24 instantaneously loses the sense of the baking soda layer, this is the signal for controlling the flap valve 25 to open. When the flap valve 25 opens, the baking soda powder in the silo will quickly fall into the powder loading box 11.

[0029] The bottom of the discharge connection pipe 6 is screwed with a powder concentration sensor 102, which is used to sense the concentration of baking soda powder discharged into the discharge connection pipe 6. The upper part of the inner wall of the discharge connection pipe 6 is bolted with a gas guiding piece 101. The gas guiding piece 101 is an arc-shaped plate with a 30-degree bend at the lower part, which is used to obliquely block the downward exhaust gas at the upper part of the discharge connection pipe 6 to the right end of the gas; the upper end flange of the discharge connection pipe 6 is connected to a connection pipe 27, and the upper end flange of the connection pipe 27 is connected to the air outlet end of the solenoid valve II 28. The air inlet end of the solenoid valve II 28 is connected with a quick-release filtering and inflating mechanism, and the quick-release filtering mechanism is connected with a pressure gas tank 31; the quick-release filtering and inflating 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, inflate the pressure gas tank 31, and switch its double-filter setting;

[0030] The quick-release filtering and inflating mechanism can realize the switching of the double-filter setting, so as to avoid affecting its normal filtering and inflating use when replacing one of the filter settings; during the inflation process, under the monitoring and analysis of the control mechanism on the change amount of the air pressure value per unit time, it is determined whether the currently used filter setting meets the inflation filtering requirements. If not, the filter setting will be switched immediately, and the control mechanism will quickly remove the problematic air filter setting of the quick-release filtering and inflating mechanism to facilitate the replacement of the air filter consumables. When the air pressure value is lower than the threshold range, it immediately inflates the pressure gas tank 31, and when the air pressure value is higher than the threshold range, it immediately stops inflating the pressure gas tank 31;

[0031] A control mechanism is also installed on the processing box 2. The control mechanism is used to receive external control signals and control the operation of the Roots air blower 4 and the solenoid valve I 5, and control the operation of the flap valve 25, the granulation mechanism and the solenoid valve II 28 by analyzing the powder level signal input by the level gauge 24 and the powder concentration signal input by the powder concentration sensor 102; it controls the inflation of the pressure gas tank 31 and the switching of its double-filter setting by receiving and analyzing the air pressure value input by the quick-release filtering mechanism in real time.

[0032] When the powder concentration received by the powder concentration sensor 102 is lower than the set powder concentration threshold, and the time period from when the upper level gauge 24 loses the sensed level signal to when the lower level gauge 24 loses the sensed level signal exceeds the calibrated time period, the control mechanism will control the crushing mechanism to operate at an accelerated speed, thereby accelerating the process of crushing the powder block. 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 crushing mechanism to operate at a reduced speed.

[0033] Refer to Figure 2 , on the upper left side of the pneumatic conveying pipe 3, a support pipe 8 is seamlessly welded. An interference fit seal bearing 9 is arranged inside the support pipe 8, and the inner ring of the interference fit seal bearing 9 is inserted into the discharge pipe 10 with an interference fit seal.

[0034] With such a setting, not only can the discharge pipe 10 rotate stably inside the support pipe 8, but also the baking soda powder in the powder loading box 11 can be discharged into the pneumatic conveying pipe 3 through the support pipe 8.

[0035] Refer to Figure 2 , Figure 3 and Figure 4 , the crushing mechanism includes a bearing one 12 inserted into the bottom of the powder loading box 11 with an interference fit. The discharge pipe 10 is inserted into the inner ring of the bearing one 12 with an interference fit. The upper end of the discharge pipe 10 passing through the powder loading box 11 is seamlessly welded with a rotary bucket 16. A bearing groove is provided on the inner wall of the powder loading box 11, and a sealed bearing ring is arranged on the inner wall of the bearing groove. The outer edge of the middle side of the rotary bucket 16 is hermetically inserted into the inner ring of the sealed bearing ring. The rotary bucket 16 is a double-conical circular bucket structure up and down; the upper surface of the rotary bucket 16 is evenly provided with sieve holes 17, and the mesh number of the sieve holes 17 is set to 80 meshes;

[0036] Scrapers 13 are fixed to the four sides inside the powder loading box 11 by bolts. A guide head 14 is welded between the tops of the scrapers 13. The guide head 14 is a conical structure; a cylinder is integrally arranged at the center position of the top of the rotary bucket 16. A bearing groove is arranged at the center position of the bottom of the guide head 14. A support bearing is inserted into the bearing groove with an interference fit. The cylinder is inserted into the inner ring of the support bearing. The guide head 14 forms an upper rotation bearing for the rotation of the rotary bucket 16, making the high-speed rotation of the rotary bucket 16 more stable. Scraping teeth 15 are provided at the bottom of the scraper 13, and the distance between adjacent scraping teeth 15 is 0.1 mm. The tip of each scraping tooth 15 is 0.02 mm away from the upper surface of the rotary bucket 16;

[0037] Therefore, when the rotary bucket 16 rotates at a high speed, the baking soda powder at the lower part inside the powder loading box 11 is driven by the rotary bucket 16 to move. Under the restriction of the scraper 13, the baking soda powder is distributed at a high speed above the rotary bucket 16. Under the brushing of the scraping teeth 15 below the scraper 13, the baking soda powder quickly passes through the sieve holes 17 and is discharged into the rotary bucket 16. The baking soda powder block is quickly pulverized under the action of the scraping teeth 15 and is also discharged into the sieve bucket 16 through the sieve holes 17.

[0038] The support anchor rod 18 is internally screwed in the air delivery pipe 3. The support anchor rod 18 is a round rod structure with a needle head at the upper end. The support anchor rod 18 penetrates through the discharge pipe 10 into the rotary bucket 16. One end of the support anchor rod 18 penetrating into the rotary bucket 16 is integrally provided with side scraping blades 19 in a circumferentially uniform manner. The side scraping blades 19 are V-shaped blades, and the clearance between the side scraping blades 19 and the inner wall of the rotary bucket 16 is set to 0.01 mm.

[0039] Under the high-speed rotation of the rotary bucket 16, the side scraping blades 19 can scrape off the baking soda powder accumulated on the inner wall of the rotary bucket 16, so that the baking soda powder in the rotary bucket 16 can effectively drain downward into the discharge pipe 10.

[0040] The bottom of the powder loading box 11 is bolted to the transmission box 20. One end of the discharge pipe 10 passing through the transmission box 20 is connected to the first gear 21 by interference key connection. The bottom right side of the transmission box 20 is bolted to the motor 23. The motor 23 is a stepper motor. One end of the rotor shaft of the motor 23 penetrating into the transmission box 20 is connected to the second gear 22 by interference key connection. The second gear 22 meshes with the first gear 21.

[0041] Under the operation of the motor 23, the second gear 22 drives the first gear 21 to rotate, thereby driving the discharge pipe 10 and the rotary bucket 16 to rotate.

[0042] Refer to Figure 1 、 Figure 2 、 Figure 5 and Figure 6 As shown in, the quick-release filter inflation mechanism includes a tee one 29 flange-connected to the intake end of the electromagnetic valve two 28. The upper end of the tee one 29 is flange-connected to the electronic barometer 30. The air connection end of the electronic barometer 30 is flange-connected to the intake pipe end of the pressure gas tank 31.

[0043] The electronic barometer 30 is used to monitor the air pressure of the high-pressure nitrogen in the pressure gas tank 31 in real time. When the electromagnetic valve two 28 is opened, the high-pressure nitrogen in the pressure gas tank 31 is instantaneously filled into the discharge connecting pipe 6 to provide auxiliary power for pneumatic conveying.

[0044] The right end of the tee one 29 is flange-connected to a tee two 32. Both ends of the tee two 32 are flange-connected to an electromagnetic valve three 33. The intake end of the electromagnetic valve three 33 is flange-connected to an inlet pipe 34. The inlet pipe 34 is flange-connected to the left end of the filter cartridge 35. The right end of the filter cartridge 35 is provided with a sealing ring groove 36. A sealing ring 36 is adhesively bonded in the sealing ring groove with a sealing glue. The material of the sealing ring 36 is neoprene. A pressing disk 37 is tightly pressed on the sealing ring 36. The pressing disk 37 is a circular plate structure with a flange connecting pipe at the center position of one end. In addition, a pressing convex ring is integrally provided at the outer edge of the left end of the pressing disk 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. An insertion pipe 39 is provided at one end of the air filter element 38 for the pressing disk 37 and the insertion pipe 39 is inserted into the air filter element 38. The insertion pipe 39 is evenly provided with discharge holes 40.

[0045] The right - hand flange of the crimping disc 37 is flange - connected to the exhaust end of the electromagnetic air valve III 33. The intake end flange of the electromagnetic air valve 33 is flange - connected to the connecting pipe 41, and an air - connecting hose 42 is press - fitted over the connecting pipe 41. The air - connecting hose 42 is fastened tightly with a hose clamp. The air - connecting hose 42 is connected to an external compressed air station. The intake end of the compressed air station is connected to the exhaust end of the gas dryer, and the intake end of the gas dryer is connected to the exhaust end of the nitrogen generator.

[0046] Therefore, when one of the electromagnetic air valves III 33 is opened, the compressed nitrogen is quickly discharged into the pressure gas tank 31, thus realizing the inflation of the pressure gas tank 31.

[0047] It should be noted that the capacity of the pressure gas tank 31 is 800L. The pressure gas tank 31 is a carbon - fiber high - pressure gas tank, and the maximum bearing pressure is 22MPa.

[0048] The middle side of the tee II 32 is welded with a support rod 43, and the right - hand end of the support rod 43 is bolt - fixed to the support plate 44. The two sides of the support plate 44 are bolt - fixed with electric telescopic rods 45. The electric telescopic rods 45 are electric telescopic rods driven by a stepping motor. The ejector rod of the electric telescopic rod 45 penetrates through the support plate 44 and is bolt - fixed to the connecting plate 46. The connecting plate 46 is integrally arranged on the crimping disc 37.

[0049] When the two electromagnetic air valves III 33 on either the front or the rear side are closed, the ejector rod of the electric telescopic rod 45 on that side extends, thus driving the crimping disc 37 to disengage from the pressing of the sealing ring 36, and the insertion pipe 39 disengages 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 ejector rod of the electric telescopic rod 45 retracts, thus driving the insertion pipe 39 to be pressed tightly in the inner groove of the air filter element 38, and the pressing convex ring of the crimping disc 37 presses the sealing ring 36 concave, thus ensuring the sealing performance of the cooperation between the crimping disc 37 and the filter cartridge 35.

[0050] After the nitrogen is dried by the gas dryer, it is discharged to the insertion pipe 39 through the compressed air station, and then discharged to the air filter element 38 through the uniformly arranged discharge holes 40. After passing through the water filtration and impurity removal of the air filter element 38, it is discharged, thus making the nitrogen charged into the pressure gas tank 31 purer.

[0051] Refer to Figure 1 and Figure 2 The control mechanism includes a protection box 47 bolt - fixed on the right side inside the processing box 2. A development board 48 is fixed with screws using an insulating pad inside the protection box 47. A driver 49 and an integrated relay 50 are bolt - fixed on the left side inside the processing box 2. The number of drivers 49 is 3, arranged front - to - back. The front part of the processing box 2 is fixed with an industrial control computer 103 using screws.

[0052] Among them, the power cord of the Roots air blower 4 is connected to the lower post of the wiring of the peripheral relay, the upper post of the wiring of the peripheral relay is connected to the peripheral power supply, and the coil terminal of the peripheral relay is connected to the power control terminal of the integrated relay 50 through a cable. The main power supply of the integrated relay 50 is connected to the peripheral power supply; the control terminals of the first electromagnetic air valve 5, the second electromagnetic air valve 28, and the third electromagnetic air valve 33 are connected to the power control terminal of the integrated relay 50 through cables; the power supply controlled terminal of the stepping motor of the flap valve 25 is connected to the power control output terminal of a driver through a cable, the power supply controlled terminal of the motor 23 is connected to the power control output terminal of a driver through a cable, and the power supply controlled terminals of the two electric telescopic rods 45 are connected to the power control output terminal of a driver through a cable. The main power input terminals of all drivers are connected to the peripheral power supply through cables.

[0053] Refer to Figure 7 , a control module is provided on the development board 48. 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 air pressure gauge 30 in real time. The signal access pin of the air pressure value receiving module is connected to the signal line of the electric air pressure gauge 30 through a cable; the material level signal receiving module is used to receive the signal of the material level gauge 24 in real time. The signal line of the material level gauge 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. The signal access pin of the dust concentration signal receiving module is connected to the transmission line of the powder concentration sensor 102.

[0054] 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 in a transmission manner. The analysis and processing module is connected to a control signal receiving module in a transmission manner. The control signal receiving module is used to receive the control signal input from the industrial control computer 103 in real time. The signal output terminal of the industrial control computer 103 is connected to the signal input pin of the control signal receiving module through a signal line.

[0055] In addition, the drive control program and the integrated relay control program are loaded in the industrial control 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 first relay control module, the second relay control module, the third relay control module, and the steering and speed control module through the industrial control computer 103. Under the judgment of the analysis and processing module, the instructions issued through the industrial control computer 103 are priority instructions.

[0056] The analysis and processing module is connected to a drive control module, a rotational speed control module, a relay control module 1, a relay control module 2, a relay control module 3, and a steering and rotational speed control module. The analysis and processing module is used to receive air pressure data and, when the air pressure data reaches the set air pressure threshold, issue an instruction to the relay control module 3 to turn on or off the power supply of the solenoid air valve 33. Among them, the air pressure threshold is divided into a low value S and a high value H. S is 9 MPa and H is 20 MPa. When the air pressure data reaches S, a relay control instruction to turn on the solenoid air valve 33 is issued to the relay control module 3. When the air pressure data reaches H, a relay control instruction to turn off the solenoid air valve 33 is issued to the relay control module 3, so as to control the quick-release type filter and inflation mechanism to inflate the pressure gas tank 31 and stop running; it also issues an operation instruction to the steering and rotational speed control module according to the change of air pressure data per unit time, so as to control the quick-release type filter and inflation mechanism to perform double filter gas switching. The calibrated pressure increase speed range stored in the analysis and processing module is VI-VT / min. When the pressure increase speed of the air pressure data is within the range of VI-VT / min for 20 consecutive minutes, no operation instruction is issued to the steering and rotational speed control module. When the pressure increase speed of the air pressure data is lower than VI / min for 2 consecutive minutes within 20 consecutive minutes, it indicates that there is a situation of filter air blockage, and an operation instruction is issued to the steering and rotational speed control module. Under the execution of this operation instruction, no operation instruction to extend the ejector rod is issued to the electric telescopic rod 45 on the side without filter air blockage, and an operation instruction to extend the ejector rod is issued to the electric telescopic rod 45 on the side with filter air blockage. Before executing this operation instruction, if the inflation state has not been carried out, the threshold condition for the completion of the closing valve instruction of the solenoid air valve 33 on the side with filter air blockage needs to be obtained first. If it is in the inflation state, in addition to obtaining the threshold condition for the completion of the closing valve instruction of the solenoid air valve 33 on the side with filter air blockage, the threshold condition for the completion of the opening valve instruction of the solenoid air valve 33 on the side without filter air blockage also needs to be obtained to run the instruction to extend the ejector rod of the electric telescopic rod 45 on the side with filter air blockage; the analysis and processing module is also used to receive and analyze the occurrence of the level gauge signal and issue an operation instruction to the drive control module to control the opening and closing operation of the flap valve 25; by analyzing the powder concentration data, a rotational speed change control instruction is issued to the rotational speed control module to control the running speed adjustment of the granulation mechanism, where the basic powder concentration value is R g / m 3 , where R is the rated concentration value of pneumatically transporting baking soda powder at the standard speed in the cross-sectional area and length of the unit powder discharge pipe 7 of the Roots air blower 4; when the continuously obtained powder concentration E is ≥R g / m 3 for 1 consecutive minute, no rotational speed change control instruction is issued; when the continuously obtained powder concentration E is <R g / m 3 for 1 consecutive minute, for every 40 g / m that E is lower than R 3When the speed increases at 0.4 r / s and the deceleration maximum speed limit is 28 r / s, and the maximum speed limit is reached, no more speed increase commands are issued. With such settings, when the powder volume in the lower row is low, the operating speed of the granule crushing mechanism can be increased to accelerate the processing of powder lumps in the baking soda powder and promote the sieving and falling of the baking soda powder; and it is also used to issue an opening and closing command for controlling the electromagnetic air valve 28 to the second relay control module. Among them, when the powder concentration E obtained in real time exceeds R g / m 3 ≥200 g / m 3 a valve opening command for controlling the electromagnetic air valve 28 is issued to the second relay control module;

[0057] The analysis and processing module is also connected with a control signal receiving module. The control signal receiving module is used to receive the control signals sent by the industrial control computer 103 in real time, and the analysis and processing module analyzes and processes the types of control signals, and correspondingly issues temporary control commands to the drive control module, the speed control module, the first relay control module, the second relay control module, the third relay control module and the steering and rotation speed control module;

[0058] Among them, the signal output pins of the drive control module, the speed control module and the steering and rotation speed control module are respectively connected to the signal input ends of a driver 49 through signal lines, while the signal output pins of the first relay control module, the second relay control module and the third relay control module are respectively connected to the signal access ends corresponding to the electromagnetic air valve 5, the electromagnetic air valve 28 and the electromagnetic air valve 328 on the integrated relay 50 through signal lines.

[0059] The first relay control module is used to control the opening and closing of the electromagnetic air valve 5. Under the control of the analysis and processing module, before the first relay control module issues a valve closing command, the integrated relay must first receive the command to close the roots air blower 4 issued by the industrial control computer 103, and after a delay of 4 seconds, the first relay control module can issue a valve closing command. Without the command to close the roots air blower 4, the valve closing command issued by the first relay control module is always intercepted by the analysis and processing module; and before the integrated relay receives the command to start the roots air blower 4 issued by the industrial control computer 103, it must first receive the valve opening command for the electromagnetic air valve 5 issued by the industrial control computer 103 to the first relay control module. After the valve opening command is issued for 2 seconds, the integrated relay can send out the command to start the roots air blower 4. Without the valve opening command for the electromagnetic air valve 5, the command to start the roots air blower 4 issued by the industrial control computer 103 is always intercepted by the analysis and processing module.

[0060] The working principle of this embodiment is as follows:

[0061] Granule crushing mechanism: The baking soda powder lumps are crushed into powder by the granule crushing mechanism and then discharged into the pneumatic conveying pipe 3, thereby weakening the influence of the baking soda powder lumps in the silo on pneumatic conveying;

[0062] Quick-disassembly filtering and inflation mechanism and control mechanism: The quick-disassembly filtering and inflation mechanism can realize the switching of double-filtering settings, thus avoiding affecting its normal filtering and inflation use when replacing one of the filtering settings; during the inflation process, under the monitoring and analysis of the control mechanism for the change amount of air pressure value per unit time, it is determined whether the currently used filtering setting meets the inflation filtering requirements, and with the control of the control mechanism, the pressure gas tank 31 is automatically inflated and deflated.

[0063] Crushing mechanism, powder concentration sensor 102 and control mechanism: By the control mechanism receiving and analyzing the real-time powder concentration input by the powder concentration sensor 102, the running speed of the crushing mechanism is controlled. When the amount of powder discharged downward is relatively low, the running speed of the crushing mechanism can be increased to accelerate the treatment of the powder lumps in the baking soda powder and promote the sieving and falling of the baking soda powder.

[0064] Second electromagnetic air 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 200 g / m of the Roots air blower 4 for air transportation 3 , a valve opening instruction for the second electromagnetic air valve 28 is sent to the second relay control module, so that the high-pressure nitrogen in the pressure gas tank 31 is instantaneously discharged downward to provide auxiliary air blowing power to ensure sufficient air power in the powder discharge pipe 7 and more effectively discharge the baking soda powder inside it quickly.

[0065] The above is only a preferred embodiment of the present invention and is not used to limit the protection scope of the present invention.

Claims

1. A pneumatic conveying device for baking soda, characterized in that: It includes a platform plate (1), a processing box (2) is arranged in the middle side of the platform plate (1), an air conveying 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), the exhaust end of the Roots air blower (4) is connected with an electromagnetic air valve I (5) and one end of the electromagnetic air valve I (5) is connected to the other end of the air conveying pipe (3); The other end of the air conveying pipe (3) is connected with a discharge connecting pipe (6), one end of the discharge connecting pipe (6) is connected with a powder discharge pipe (7), a discharge pipe (10) is hermetically and rotatably arranged on the air conveying pipe (3), a powder loading box (11) is arranged on one side of the top of the processing box (2), a crushing mechanism is arranged at the bottom of the powder loading box (11), and the crushing mechanism is used for pulverizing the lumps existing in the baking soda powder discharged into the powder loading box (11) and discharging them into the air conveying pipe (3) through the discharge pipe (10); A level gauge (24) is arranged on one side of the powder loading box (11), and the level gauge (24) is used for sensing the powder level height of the baking soda powder in the powder loading box (11); the top of the powder loading box (11) is connected with a flap valve (25) and the feeding end of the flap valve (25) is connected with the bottom of the silo through a discharge pipe (26); A powder concentration sensor (102) is arranged at the bottom of the discharge connecting pipe (6), and the powder concentration sensor (102) is used for sensing the baking soda powder concentration discharged into the discharge connecting pipe (6). A gas guiding sheet (101) is arranged in the upper part of the discharge connecting pipe (6). The upper end of the discharge connecting pipe (6) is connected with a connecting pipe (27), one end of the connecting pipe (27) is connected with an electromagnetic air valve II (28), the intake end of the electromagnetic air valve II (28) is connected with a quick-release filtering and inflating mechanism, and the quick-release filtering mechanism is connected with a pressure gas tank (31); the quick-release filtering and inflating mechanism is used for receiving the air pressure value in the pressure gas tank (31) in real time, filtering the air discharged from the external compressed air station, inflating the pressure gas tank (31), and switching its double-filtering setting; A control mechanism is also arranged on the processing box (2), and the control mechanism is used for receiving an external control signal to control the operation of the Roots air blower (4) and the electromagnetic air valve I (5), and controlling the operation of the flap valve (25), the crushing mechanism and the electromagnetic air valve II (28) by analyzing the powder level signal input by the level gauge (24) and the powder concentration signal input by the powder concentration sensor (102); controlling 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 by the quick-release filtering mechanism in real time.

2. The soda ash pneumatic conveying device according to claim 1, wherein: A support pipe (8) is communicated with the air conveying pipe (3), a sealing bearing (9) is arranged in the support pipe (8), and the inner ring of the sealing bearing (9) is provided with a discharge pipe (10).

3. The soda ash pneumatic conveying device according to claim 2, wherein: The granule crushing mechanism includes a first bearing (12) provided at the bottom of the powder loading box (11). The discharge pipe (10) is arranged inside the inner ring of the first bearing (12). One end of the discharge pipe (10) penetrating into the powder loading box (11) is connected with a rotary bucket (16). The upper surface of the rotary bucket (16) is evenly provided with sieve holes (17). Scraping blades (13) are fixedly installed on the four sides inside the powder loading box (11). A guide head (14) is connected between the tops of the scraping blades (13). The top of the rotary bucket (16) is rotatably arranged at the bottom of the guide head (14). Scraping teeth (15) are provided at the bottom of the scraping blades (13). A support needle rod (18) is connected inside the pneumatic conveying pipe (3). The support needle rod (18) penetrates through the discharge pipe (10) into the rotary bucket (16). Side scraping blades (19) are evenly arranged in a circumferential direction at one end of the support needle rod (18) penetrating into the rotary bucket (16). A transmission box (20) is arranged at the bottom of the powder loading box (11). One end of the discharge pipe (10) penetrating into the transmission box (20) is provided with a first gear (21). A motor (23) is arranged on one side at the bottom of the transmission box (20). One end of the rotor shaft of the motor (23) penetrating into the transmission box (20) is connected with a second gear (22). The second gear (22) meshes with the first gear (21).

4. The soda ash pneumatic conveying device according to claim 3, characterized in that: The quick-release filter inflation mechanism includes a first tee (29) connected to one end of the solenoid valve two (28). One end of the first tee (29) is connected with an electronic barometer (30). The air connection end of the electronic barometer (30) is connected with a pressure gas tank (31). The other end of the first tee (29) is connected with a second tee (32). Two ends of the second tee (32) are connected with solenoid valves three (33). The air inlet ends of the solenoid valves three (33) are connected with a filter cartridge (35) through a ventilation pipe (34). A sealing ring (36) is arranged at one end of the filter cartridge (35). A pressing disk (37) is tightly pressed on the sealing ring (36). An air filter element (38) is arranged inside the filter cartridge (35). An insertion pipe (39) is arranged at one end of the pressing disk (37) and the insertion pipe (39) is inserted into the air filter element (38). Drain holes (40) are evenly arranged on the insertion pipe (39). A connecting pipe (41) is arranged at the other end of the pressing disk (37) and the connecting pipe (41) is connected with an external compressed gas station through an air connection hose (42). One side of the second tee (32) is connected with a support rod (43) and one end of the support rod (43) is provided with a support plate (44). Electric telescopic rods (45) are arranged on both sides of the support plate (44). The top rods of the electric telescopic rods (45) penetrate through the support plate (44) and are connected with a support connecting plate (46). The support connecting plate (46) is connected to the pressing disk (37).

5. A sodium bicarbonate pneumatic conveying device according to claim 4, characterized in that: The control mechanism includes a protection box (47) arranged on one side inside the processing box (2). A development board (48) is arranged inside the protection box (47). A driver (49) and an integrated relay (50) are arranged on the other side inside the processing box (2). An industrial control computer (103) is arranged at the front of the processing box (2).

6. The soda ash pneumatic conveying device according to claim 5, characterized in that: A control module is provided on the development board (48). 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. The material level signal receiving module is used to receive the material level gauge (24) signal in real time. The dust concentration signal receiving module is used to receive the powder concentration data input by the powder concentration sensor (102) in real time; 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 in a transmission manner. The analysis and processing module is connected to a control signal receiving module in a transmission manner. The control signal receiving module is used to receive the control signal input from the industrial control computer (103) in real time; The analysis and processing module is connected to a drive control module, a rotation speed control module, a relay control module 1, a relay control module 2, a relay control module 3, and a steering and rotation 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, issue an instruction to turn on and off the power supply of the solenoid air valve 3 (33) to the relay control module 3, so as to control the quick-release filter inflation mechanism to inflate and stop running the pressure gas tank (31). It also issues an operation instruction to the steering and rotation speed control module for the two-side electric telescopic rods (45) according to the change of the air pressure data per unit time, so as to control the quick-release filter inflation mechanism to perform double-filter gas switching; The analysis and processing module is also used to receive and analyze the occurrence of the material level gauge signal and issue an operation instruction to the drive control module, so as to control the opening and closing operation of the flap valve (25); By analyzing the powder concentration data, issue a rotation speed change control instruction to the rotation speed control module, so as to control the operation speed adjustment of the granulation mechanism, and is also used to issue an opening and closing instruction for controlling the solenoid air 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 the control signal sent by the industrial control computer (103) in real time, and analyze and process the type of the control signal through the analysis and processing module, and correspondingly issue a temporary control instruction to the drive control module, the rotation speed control module, the relay control module 1, the relay control module 2, the relay control module 3, and the steering and rotation speed control module; The relay control module 1 is used to control the opening and closing of the solenoid air valve 1 (5).

Images