Chinese medicine powder screening device and process

Abstract

The invention discloses a Chinese medicine powder screening device and a process thereof, which belongs to the field of screening technology, and comprises the following steps: step one: drying the Chinese medicine powder particles; step two: performing iron removal and pre-screening operations on the Chinese medicine powder particles; step three: selecting the screening fineness on the Chinese medicine powder screening device, continuously adding powdered Chinese medicine to the Chinese medicine powder screening device, and further screening the powdered Chinese medicine through the Chinese medicine powder screening device; step four: cleaning the retained and unqualified Chinese medicine powder particles in the Chinese medicine powder screening device, and taking out the qualified Chinese medicine powder particles screened by it; step five: performing iron removal and drying on the screened Chinese medicine powder particles. The Chinese medicine grinding powder is first subjected to rotary drying, and iron removal and pre-screening operations are performed after drying, and the Chinese medicine powder screening device is used for grade selection screening, which can not only accelerate the screening speed, but also is more convenient when adjusting the screening fineness.

Description

Technical Field

[0001] The invention belongs to the technical field of screening, and in particular relates to a traditional Chinese medicine powder screening device and a screening process thereof. Background Art

[0002] For some products with Chinese medicine as the main ingredients, such as facial masks and topical medicines, the powder fineness requirements for the Chinese medicine powder are relatively high. Under different Chinese medicine powder finenesses, the effects of the drug ingredients reaching the skin directly are different.

[0003] Therefore, for some commonly used Chinese herbal medicine powders, when producing them into external application Chinese herbal medicine products, in addition to the Chinese herbal medicine grinding process with the corresponding fineness level, the ground Chinese herbal medicine powders also need to be screened to ensure that the fineness of the Chinese herbal medicine powders meets the requirements of being processed into external application Chinese herbal medicine products.

[0004] At present, the common screening method is: use a screen-type screening machine to screen the Chinese medicine powder, and use the vibration mechanism combined with the screening in the screen-type screening machine to realize the vibration screening of the screen, so that qualified Chinese medicine powder can pass through the mesh of the screen; secondly, this type of screen-type screening machine can adjust the screening fineness by replacing the screens with different screening mesh sizes according to different screening fineness requirements.

[0005] However, this type of screen-type screening machine only uses a vibrating screening method during the screening process. For Chinese herbal medicine powder, which is originally light in texture, the screening speed is slow. Secondly, when adjusting its screening fineness, the screen needs to be disassembled and assembled from the inside, which is not very convenient. Summary of the invention

[0006] The purpose of the present invention is to provide a traditional Chinese medicine powder screening process to solve the problems existing in the prior art.

[0007] The Chinese medicine powder screening device comprises a pedestal, a screening cylinder is arranged on one side of the upper part of the pedestal, a plurality of groups of sieve holes are evenly arranged vertically on the screening cylinder, and the inner diameter of the holes in the plurality of groups of sieve holes on the screening cylinder gradually decreases from bottom to top;

[0008] The top of the screening cylinder is detachably provided with a top cover, and the top cover is detachably provided with a top plate, and the pedestal is provided with a lifting drive mechanism, and the lifting drive mechanism is used to drive the top plate and the top cover to perform lifting operations;

[0009] The top plate and the sieving cylinder are provided with a spraying mechanism, which is used to deliver and spray the Chinese medicine powder particles in the sieving cylinder to the sieve holes;

[0010] A powder feeding mechanism is provided on one side of the upper part of the screening cylinder, and the powder feeding mechanism is used to add Chinese medicine powder into the screening cylinder;

[0011] The pedestal and the screening cylinder are provided with a grading mechanism, which is used to grade the sieve holes on the screening cylinder and to absorb and collect the sieved Chinese medicine powder particles;

[0012] The pedestal is provided with a control mechanism, which is used to control the operation of the lifting drive mechanism, the spraying mechanism, the powder feeding mechanism and the grade selection mechanism.

[0013] Preferably, the top cover is sleeved on the top of the screening cylinder, bolts are screwed on both sides of the screening cylinder, slide grooves are provided on both sides of the top plate, sliders are slidably provided in the slide grooves, insertion ports are provided on both sides of the top cover, and an insertion rod is connected to the bottom of the slider, the insertion rod is a rod pile structure with a convex head at the lower end, and the insertion rod is inserted into the insertion port.

[0014] Preferably, the lifting drive mechanism comprises an electric telescopic rod arranged on one side of the pedestal, a top rod of the electric telescopic rod is connected to a connecting plate and one end of the connecting plate is connected to the top plate.

[0015] Preferably, the spraying mechanism comprises a rotating plate arranged in the screening cylinder, a middle section pipe is arranged at the center of the rotating plate, a row of pipes is evenly arranged in an annular direction on the middle section pipe, and bristles are evenly arranged at the ends of the row of pipes, and the bristles are in sliding contact with the screening cylinder;

[0016] The top of the middle section pipe is connected with a conduit, the conduit slides through the center of the top cover, the conduit is rotatably arranged on the top plate, a cover is arranged on the top plate, a motor three is arranged on one side of the top of the cover, the rotor shaft of the motor three penetrates into the cover and is connected with a gear one, the conduit is provided with a gear two and the gear one meshes with the gear two;

[0017] A support frame is connected to one side of the top plate, a connecting pipe is arranged on the support frame, the lower end of the connecting pipe is rotatably arranged on the top of the conduit, and the connecting pipe is connected to an external compressed air pump through a soft pipe.

[0018] Preferably, the powder feeding mechanism includes a through pipe connected to one side of the upper part of the screening cylinder, a sealing cover is provided at one end of the through pipe, a material guide hopper is provided at the top of the through pipe, a second motor is provided on the sealing cover, a rotor shaft of the second motor passes through the sealing cover and is connected to an auger shaft, and a soft cover is provided at one end of the auger shaft.

[0019] Preferably, the selection mechanism comprises a retaining ring sleeved on the screening cylinder, the inner wall of the retaining ring is provided with a closed ring, the closed ring is attached to the outer wall of the screening cylinder, and the upper part of the screening cylinder is provided with a top ring;

[0020] The pedestal is connected with a slide bar which passes through a retaining ring, the top of the slide bar is connected to the top ring, an air guide ring is arranged on the outer side of the retaining ring, the top of the air guide ring is connected with a telescopic tube, and the top of the telescopic tube is connected to the bottom of the top ring;

[0021] A motor 1 is arranged at the bottom of the pedestal, a rotor shaft of the motor 1 is connected with a lead screw which is screwed to one side of the retaining ring, and a top of the lead screw is rotatably arranged on the top ring;

[0022] The slide rod and the lead screw are both sleeved with a telescopic outer cover, and the upper and lower ends of the telescopic outer cover are bonded to the retaining ring and the top ring by means of a sealant;

[0023] A powder suction pump is arranged on the pedestal, and a powder suction end of the powder suction pump is connected to one side of the air guide ring through a suction pipe. A storage box is arranged on the pedestal and close to the powder suction pump, and a powder discharge end of the powder suction pump is connected to the storage box. A rotating ring is screwed on the top of the storage box, and rotating rods are evenly arranged on the outer circumference of the rotating ring.

[0024] A filter plate is arranged in the rotating ring, a support ring is arranged on the storage box, and the bottom of the rotating ring is pressed tightly on the support ring;

[0025] A powder concentration detector is arranged on one side of the storage box and at a position corresponding to the powder discharge end of the powder suction pump.

[0026] Preferably, the control mechanism comprises a support column connected to the pedestal, the top of the support column is connected to a control box, a protection box is arranged in the control box and a development board is arranged in the protection box, a guard frame is arranged at the inner bottom of the control box, a driver is arranged in the guard frame, and an industrial computer is arranged on the cover of the control box;

[0027] The development board is provided with a control module, which includes a control signal receiving module and a powder concentration signal receiving module. The control signal receiving module is used to receive a control signal input by an external computer, and the powder concentration signal receiving module is used to receive powder concentration information sent by a powder concentration detector in real time.

[0028] The control signal receiving module and the powder concentration signal receiving module are connected to the analysis and processing module, and the analysis and processing module is connected to the steering speed control module 1, the steering speed control module 2, the steering speed control module 3, the speed control module 1 and the speed control module 2;

[0029] The analysis and processing module is used to classify the control signals in the external computer and distribute them to the steering speed control module 1, the steering speed control module 2, the steering speed control module 3, the speed control module 1 and the speed control module 2, and adapt the running speed of the spraying mechanism and the powder feeding mechanism in combination with the powder concentration information;

[0030] The steering speed control module 1 is used to control the operation of the lifting drive mechanism, the steering speed control module 2 is used to control the operation of the powder feeding mechanism, the speed control module 1 is used to control the operation of the spraying mechanism, and the steering speed control module 3 and the speed control module 2 are used to control the operation of the grade selection mechanism.

[0031] A Chinese medicine powder screening process using a Chinese medicine powder screening device comprises the following steps:

[0032] Step 1: Dry the Chinese medicine powder;

[0033] Step 2: Remove iron from the Chinese medicine powder and pre-screen it;

[0034] Step 3: Selecting a screening fineness on the Chinese medicine powder screening device, continuously adding powdered Chinese medicine to the Chinese medicine powder screening device, and further screening the powdered Chinese medicine through the Chinese medicine powder screening device;

[0035] Step 4: Clean the retained and unqualified Chinese medicine powder particles in the Chinese medicine powder screening device, and take out the qualified Chinese medicine powder particles that have passed the screening;

[0036] Step 5: Remove iron and dry the sieved Chinese medicine powder.

[0037] Preferably, in step 1, a double-cone rotary dryer is used to dry the Chinese medicine powder particles, and the heating and drying temperature is 80°C.

[0038] Preferably, in the step 2, a drawer-type powder deironing device is used for deironing, and the deironing times are at least 3 times. A rotary vibrating screen with a screening accuracy of 160 μm is used to vibrate and screen the deironed Chinese medicine powder to screen out unqualified Chinese medicine powder.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] The Chinese medicine powder screening device of the present invention has a plurality of sieve holes arranged on the screening cylinder from bottom to top, and the cooperation of the lifting drive mechanism and the grading mechanism can realize the rapid adjustment of the fineness of the Chinese medicine powder particles, and the cooperation of the spraying mechanism and the grading mechanism can not only realize the rapid screening of qualified Chinese medicine powder particles, but also prevent the sieve holes from being blocked by unqualified Chinese medicine particles.

[0041] Driven by the lifting drive mechanism, when the insertion rod is inserted into the insertion port, the top cover and the top plate are vertically combined with each other. When the bolt is screwed out of the slot, the lifting drive mechanism drives the top cover and the top plate to move upward as a whole, making it convenient to add Chinese medicine powder into the screening cylinder and to remove unqualified Chinese medicine powder from the screening cylinder.

[0042] The Chinese medicine powder screening process of the present invention first performs rotary drying on the Chinese medicine powder, performs iron removal and pre-screening operations after drying, and performs grade screening through a Chinese medicine powder screening device, which can not only accelerate the screening speed but also is more convenient in adjusting the screening fineness. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a front view schematic diagram of the present invention;

[0044] Figure 2 for Figure 1 A partial cutaway diagram of

[0045] Figure 3 It is a schematic diagram of the connection of the rotating plate of the present invention;

[0046] Figure 4 for Figure 2 A schematic diagram of the structure at a is enlarged;

[0047] Figure 5 for Figure 1 Schematic diagram of the section at AA;

[0048] Figure 6 for Figure 2 Enlarged structural diagram of the middle control box;

[0049] Figure 7 It is a schematic diagram of the connection of each module in the control and operation module of the present invention.

[0050] In the figure: 1 base, 2 screening cylinder, 3 sieve hole, 4 rotary plate, 5 middle section pipe, 6 row pipe, 7 bristles, 8 retaining ring, 9 closing ring, 10 top ring, 11 air guide cover ring, 12 telescopic pipe, 13 sliding rod, 14 telescopic outer cover, 15 motor 1, 16 screw, 17 through pipe, 18 guide hopper, 19 motor 2, 20 auger shaft, 21 soft cover, 22 powder suction pump, 23 suction pipe, 24 storage box, 25 rotary ring, 26 rotary rod, 27 filter plate, 2 8 support ring, 29 soft ring, 30 powder concentration detector, 31 top cover, 32 bolt, 33 top plate, 34 slider, 35 plug rod, 36 connecting plate, 37 electric telescopic rod, 38 catheter, 39 cover, 40 motor three, 41 gear one, 42 gear two, 43 sealed bearing, 44 connecting pipe, 45 soft pipe, 46 support frame, 47 support column, 48 control box, 49 protection box, 50 development board, 51 guard frame, 52 driver, 53 industrial computer. DETAILED DESCRIPTION

[0051] 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.

[0052] The Chinese medicine powder screening process comprises the following steps:

[0053] Step 1: Dry the Chinese medicine powder; in step 1, a double-cone rotary dryer is used to dry the Chinese medicine powder, the heating and drying temperature is 80°C, and the drying time is 2 hours.

[0054] Step 2: De-ironize and pre-screen the Chinese medicine powder; in step 2, use a drawer-type powder de-ironizer to remove iron, the de-ironization times are 4 times, and use a rotary vibrating screen with a screening accuracy of 160μm to vibrate and screen the de-ironized Chinese medicine powder to screen out unqualified Chinese medicine powder.

[0055] In step 2, the purpose of using the rotary vibration screen for screening is to perform preliminary screening of the Chinese medicine powder particles and reduce the screening pressure of the Chinese medicine powder screening device.

[0056] Step 3: Selecting a screening fineness on the Chinese medicine powder screening device, continuously adding powdered Chinese medicine to the Chinese medicine powder screening device, and further screening the powdered Chinese medicine through the Chinese medicine powder screening device;

[0057] An appropriate amount of Chinese medicine powder is added to the Chinese medicine powder screening device through the powder feeding mechanism, the grading mechanism grades the screening fineness, and the spraying mechanism cooperates with the grading mechanism to achieve rapid screening of the Chinese medicine powder.

[0058] Step 4: Clean the retained and unqualified Chinese medicine powder particles in the Chinese medicine powder screening device, and take out the qualified Chinese medicine powder particles that have passed the screening;

[0059] Qualified Chinese medicine powder particles can be taken out from the grading mechanism, and the top plate 33 and the top cover 31 are driven up by the lifting drive mechanism, so as to take out unqualified Chinese medicine powder particles from the screening cylinder 2.

[0060] Step 5: Remove iron and dry the sieved Chinese medicine powder.

[0061] The Chinese medicine powder sieved by the Chinese medicine powder screening device was deironed by a drawer-type powder remover. The deironing times were 2 times. Then the deironed Chinese medicine powder was added into a double-cone rotary dryer for drying. The heating and drying temperature was 80°C and the drying time was 3 hours.

[0062] See also Figure 1 and Figure 2 The Chinese medicine powder screening device comprises a pedestal 1, the four sides of the pedestal 1 are fixed to the ground by expansion bolts, a screening cylinder 2 is fixed by bolts on the middle side of the upper part of the pedestal 1, a plurality of groups of sieve holes 3 are evenly arranged vertically on the screening cylinder 2, and the inner diameters of the 13 groups of sieve holes 3 on the screening cylinder 2 gradually decrease from bottom to top, and are respectively: 150μm, 140μm, 130μm, 120μm, 100μm, 90μm, 80μm, 70μm, 60μm, 50μm, 40μm, 20μm, 10μm, each group of sieve holes 3 has four layers, and the spacing between each layer is 0.5 mm;

[0063] The top of the screening drum 2 is detachably provided with a top cover 31, and the top cover 31 is detachably provided with a top plate 33. The pedestal 1 is provided with a lifting drive mechanism, which is used to drive the top plate 33 and the top cover 31 to perform lifting operations;

[0064] By removing the top cover 31 from the screening cylinder 2 and driving the top plate 33, the top cover 31 and its upper components upward through the lifting drive mechanism, it is convenient to remove the unqualified Chinese medicine powder from the screening cylinder 2; in addition, through the lifting drive mechanism, the rotary plate 4 can be driven to move upward to the lower part of different groups of sieve holes 3, blocking the Chinese medicine powder from being discharged from the sieve holes 3 at the lower part of the rotary plate 4, which is an auxiliary screening and grading.

[0065] A spray mechanism is provided in the top plate 33 and the sieving cylinder 2, and the spray mechanism is used to deliver and spray the Chinese medicine powder in the sieving cylinder 2 to the sieve hole 3;

[0066] The qualified Chinese medicine powder particles are accelerated to pass through the sieve hole 3 by rotating and spraying the spray mechanism.

[0067] A powder feeding mechanism is provided on one side of the upper part of the screening cylinder 2, and the powder feeding mechanism is used to add Chinese medicine powder into the screening cylinder 2;

[0068] By setting the powder feeding mechanism, the Chinese medicine powder particles can be rotated into the screening cylinder 2. During the rotation process, the Chinese medicine powder particles are dispersed in the process of rolling back and forth.

[0069] The pedestal 1 and the screening cylinder 2 are provided with a grading mechanism, which is used to grade the sieve holes 3 on the screening cylinder 2 and to absorb and collect the sieved Chinese medicine powder particles;

[0070] A control mechanism is arranged on the pedestal 1, and the control mechanism is used to control the operation of the lifting drive mechanism, the spraying mechanism, the powder feeding mechanism and the grade selection mechanism.

[0071] See also Figure 1 , Figure 2 and Figure 4 The top cover 31 is slidably sleeved on the top of the screening cylinder 2. Bolts 32 are screwed on the left and right sides of the screening cylinder 2. Slots are provided on the left and right sides of the upper part of the screening cylinder 2. The bolts 32 are screwed into the slots, so that the top cover 31 is stably installed in the screening cylinder 2. Slide grooves are provided on the left and right sides of the bottom of the top plate 33. Slide blocks 34 are slidably provided in the slide grooves. The cross-sections of the slide grooves and the slide blocks 34 are isosceles trapezoids that are wide at the top and narrow at the bottom. Insertion ports are provided on the left and right sides of the top cover 31. The bottom of the slide block 34 is integrally connected with an insertion rod 35. The insertion rod 35 is a rod pile structure with a convex head integrally provided at the lower end, and the diameter of the convex head is larger than the front and rear width of the insertion port. The insertion rod 35 is slidably inserted into the insertion port, and the convex head of the insertion rod 35 slides and contacts the lower end of the insertion port.

[0072] Therefore, when the rod 35 is inserted into the insertion port, the top cover 31 and the top plate 33 are vertically combined with each other, and when the bolt 32 is screwed into the slot, the spray mechanism can be stably operated. When the bolt 32 is screwed out of the slot, the top cover 31 and the top plate 33 are driven to move upward as a whole by the lifting drive mechanism, which is convenient for adding Chinese medicine powder into the screening cylinder 2 and for removing unqualified Chinese medicine powder from the screening cylinder 2. When the rod 35 is out of the insertion port and the bolt 32 is screwed into the slot, the rotary plate 4 rises in the screening cylinder 2 and corresponds to the position below the sieve holes 3 of different groups, and the top cover 31 is tightly covered on the top of the screening cylinder 2, thereby assisting screening and grading.

[0073] See also Figure 1 and Figure 2 The lifting drive mechanism includes an electric telescopic rod 37 bolted to the right side of the pedestal 1. The electric telescopic rod 33 is a stepper motor driven electric telescopic rod. The top rod flange of the electric telescopic rod 37 is connected to a connecting plate 36 and the left end of the connecting plate 36 is welded to the right side of the top plate 33.

[0074] The top plate 33 is moved up and down by the lifting of the top rod of the electric telescopic rod 33 .

[0075] See also Figure 1 , Figure 2 , Figure 3 and Figure 5 The spray mechanism includes a rotary plate 4 that is slidably inserted into the screening cylinder 2, and the rotary plate 4 cooperates with the inner wall of the screening cylinder 2 to meet the following conditions: the Chinese medicine powder on the upper part of the rotary plate 4 cannot enter the cooperation between the rotary plate 4 and the inner wall of the screening cylinder 2. A middle section pipe 5 is seamlessly welded at the center of the rotary plate 4, and a row pipe 6 is evenly connected and integrated on the middle section pipe 5 in an annular direction. The ends of the row pipe 6 are evenly provided with bristle grooves, and bristles 7 are welded in the bristle grooves. The material of the bristles 7 is tungsten-vanadium alloy, and the bristles 7 slide in contact with the screening cylinder 2;

[0076] When compressed gas is introduced into the middle section pipe 5, it will be discharged through the evenly arranged discharge pipe 6 in the annular direction, and the rotation of the rotary plate 4 causes the Chinese medicine powder to move toward the inner wall of the screening cylinder 2. During the process, the compressed gas discharged from the rotating discharge pipe 6 can effectively spray the Chinese medicine powder, accelerate the fluidity of the Chinese medicine powder, and realize the dispersion of the Chinese medicine powder. With the brushing of the bristles 7, qualified Chinese medicine powder can quickly pass through the sieve holes 3 on the upper layer of the rotary plate 5.

[0077] In addition, the compressed gas is discharged through the rotating discharge pipe 6 and the bristles 7 are repeatedly brushed, so that the sieve holes 3 are not easily blocked by unqualified Chinese medicine particles during the long screening process.

[0078] The top of the middle section pipe 5 is connected and integrally provided with a conduit 38, which slides through the center of the top cover 31. The center of the top cover 31 is inserted into the graphite copper ring through interference, and the conduit 38 slides to fit the inner wall of the graphite copper ring. The degree of fit between the two satisfies that: the fit between the conduit 38 and the graphite copper ring satisfies that Chinese medicine powder particles cannot enter the fit gap between the two. In addition, the fit between the conduit 38 and the graphite copper ring has good lubricity, so that the conduit 38 moves up and down or rotates stably and smoothly in the graphite copper ring. The conduit 38 is rotatably arranged on the top plate 33. More specifically, a bearing groove is provided at the center of the top plate 33, and a sealed bearing is inserted through interference in the bearing groove. A cover 39 is bolted to the top plate 33, and a motor three 40 is bolted to the right side of the top of the cover 39. The rotor shaft of the motor three 40 slides into the cover 39 and is connected to the gear one 41 through an interference key. The top of the conduit 38 is connected to the gear two 42 through an interference key, and the gear one 41 meshes with the gear two 42.

[0079] Therefore, when the motor 3 40 is running, the guide tube 38 is driven to rotate through the meshing cooperation of the gear 1 41 and the gear 2 42 .

[0080] The left side bolts of the top plate 33 are fixed with a support frame 46, the top bolts of the support frame 46 are fixed with a connecting pipe 44, the lower end of the connecting pipe 44 is provided with a bearing groove, the bearing groove is sealed with an interference fit and a sealed bearing is inserted into the inner ring of the sealed bearing, the top of the conduit 38 is sealed with an interference fit and inserted into a soft conduit 45 and is tightened by a throat clamp, and is connected to the exhaust end of an external compressed air pump through the soft conduit 45.

[0081] In such a coordinated manner, the compressed gas is discharged smoothly into the conduit 38 while ensuring that the conduit 38 rotates independently.

[0082] See also Figure 1 and Figure 2 The powder feeding mechanism includes a flange connected to an opening through-tube 17 on the left side of the upper part of the screening cylinder 2, a cover is flanged on the left end of the through-tube 17, a guide hopper 18 is integrally arranged on the left side of the top of the through-tube 17, a motor 2 19 is bolted to the cover, the motor 2 19 is a stepping motor, the rotor shaft of the motor 2 19 passes through the cover and is flanged to an auger shaft 20, a soft cover 21 is installed on the right end of the auger shaft 20, the material of the soft cover 21 is chloroprene rubber, the thickness is 0.6 cm, the soft cover 21 is a conical original cover structure with a convex column set at the center of the left end, and in a natural state, its end edge is effectively attached to the inner wall of the through-tube 17.

[0083] When the motor 2 19 is running and Chinese medicine powder is added to the guide hopper 18, the auger shaft 20 rotates. During this process, the Chinese medicine powder presses against the soft cover 21, and the soft cover 21 turns inward, so that the Chinese medicine powder is brought into the screening cylinder 2. When the feeding is completed, the motor 2 19 stops running, and the end edge of the soft cover 21 is effectively attached to the inner wall of the through pipe 17, thereby preventing the Chinese medicine powder of the screening cylinder 2 from entering the through pipe 17.

[0084] See also Figure 1 , Figure 2 and Figure 5 The classifying mechanism includes a retaining ring 8 sleeved on the screening cylinder 2, the inner wall of the retaining ring 8 is bonded with a closing ring 9 by resin glue, the material of the closing ring 9 is chloroprene rubber, the closing ring 9 is tightly attached to the outer wall of the screening cylinder 2, and a top ring 10 is seamlessly welded on the upper part of the screening cylinder 2;

[0085] Therefore, when the retaining ring 8 moves up and down, the closing ring 9 clings tightly to the inner wall of the screening cylinder 2, so that after the retaining ring 8 and the rotary plate 4 rise, when the tops of the two are in the same plane, the Chinese medicine powder is prevented from being discharged through the sieve holes 3 at the bottom of the rotary plate 4.

[0086] The slide bar 13 is fixed by screws on the pedestal 1 and the slide bar 13 slides through the retaining ring 8. The top of the slide bar 13 is fixed by screws on the top ring 10. The outer side of the retaining ring 8 is seamlessly welded with an air guide ring 11. The air guide ring 11 is a circular ring structure with a U-shaped cross section. The top of the air guide ring 11 is sealed and fixed with a telescopic tube 12, and the top of the telescopic tube 12 is sealed and fixed to the bottom of the top ring 10. The material of the telescopic tube 12 is neoprene.

[0087] Through the arrangement of the telescopic tube 12, in addition to being able to expand and contract in coordination with the up and down movement of the retaining ring 8, the Chinese medicine powder particles discharged through the sieve holes 3 on the upper part of the rotary plate 4 can also be blocked inside the telescopic tube 12.

[0088] A motor 15 is bolted to the right side of the bottom of the pedestal 1. The motor 15 is a stepper motor. The rotor shaft of the motor 15 passes through the pedestal 1 and is flange-connected with a lead screw 16. The lead screw 16 is screwed to the right side of the retaining ring 8. The top of the lead screw 16 is rotatably arranged on the right side of the top ring 10. More specifically, a bearing groove is provided on the right side of the top ring 10. A bearing is inserted into the bearing groove through interference. A connecting shaft is keyed to the top center of the lead screw 16. The connecting shaft is inserted into the inner ring of the bearing through interference.

[0089] When the motor 15 is running, it can drive the retaining ring 8 to move up and down, the telescopic tube 12 shrinks, and the rotating plate 4 matched therewith rises to the top of the retaining ring 8 flush with the top of the retaining ring 8, thus completing the screening and classification operation.

[0090] Through the blocking arrangement of the telescopic tube 12 , the air guide ring 11 , the baffle ring 8 and the rotary plate 4 , the Chinese medicine powder particles discharged through the sieve holes 3 on the upper part of the rotary plate 4 are concentrated in the telescopic tube 12 and the air guide ring 11 .

[0091] The slide bar 13 and the lead screw 16 are both covered with a telescopic cover 14, and the upper and lower ends of the telescopic cover 14 are bonded to the baffle ring 8 and the top ring 10 by sealant, and a vent is provided in the area covered by the baffle ring 8 and the telescopic cover 14. The telescopic cover 14 is made of chloroprene rubber, and the telescopic cover 14 cooperates to telescope during the upward movement of the baffle ring 8. Therefore, during the screening process of the Chinese medicine powder particles, the Chinese medicine powder particles are prevented from contacting the slide bar 13 and the lead screw 16, thereby achieving the smoothness of the up and down movement of the baffle ring 8.

[0092] A powder suction pump 22 is fixed by bolts on the left side of the pedestal 1. The powder suction end of the powder suction pump 22 is fixed to a suction pipe 23 through a throat clamp. The powder suction pump 22 is a high-speed motor driven powder suction pump. The suction pipe 23 is a rubber tube with steel wire inner reinforcement. The suction pipe 23 is interference-fitted to a feed pipe integrally arranged on the left side of the air guide ring 11. A storage box 24 is fixed by screws on the pedestal 1 and close to the powder suction pump 22. The powder discharge end of the powder suction pump 22 is flange-connected to a discharge pipe integrally arranged on the right side of the storage box 24.

[0093] When the powder suction pump 22 is running, the qualified Chinese medicine powder particles in the air guide ring 11 and the telescopic tube 12 are sucked and discharged into the storage box 24 at an accelerated speed.

[0094] The top of the storage box 24 is threadedly locked with a rotating ring 25, and a rotating rod 26 is evenly welded to the outside of the rotating ring 25 in an circumferential direction. A filter plate 27 is welded inside the rotating ring 25, and the mesh diameter of the filter plate 27 is 8 microns. A support ring 28 is integrally provided on the storage box 24, and the bottom of the support ring 28 is bonded to a rubber ring with resin glue, and the bottom of the rotating ring 25 is pressed against the support ring 28;

[0095] By setting the filter plate 27 in the rotating ring 25, not only can the Chinese medicine powder in the storage box 24 be prevented from being discharged from the storage box 24, but also the gas discharged into the storage box 24 can be filtered out; and when the powder suction pump 22 stops running, the Chinese medicine powder that has passed the screening can be taken out from the storage box 24 by rotating the rotating ring 25 out of the storage box 24.

[0096] A powder concentration detector 30 is screwed to the left side of the storage box 24 and corresponds to the powder discharge end of the powder suction pump 22. The powder concentration of the Chinese medicine powder discharged into the storage box 24 is detected by the powder concentration detector 30, which provides a basis for the subsequent control mechanism to control the operating speed of the powder suction and discharge pump 22 and the motor 3 40.

[0097] See also Figure 1 , Figure 2 , Figure 6 and Figure 7The control mechanism includes a support column 47 fixed on the pedestal 1 by bolts, a control box 48 is fixed by bolts on the top of the support column 47, a protection box 49 is fixed by screws on the upper left side of the control box 48, and a development board 50 is fixed by screws in the protection box 49 with an insulating pad, a guard frame 51 is fixed by screws on the inner bottom of the control box 48, a driver 52 is fixed by the guard frame 51, and the number of drivers 52 is five, the main power supply access end of the driver 52 is connected to the peripheral power supply through a cable, and the power control output end of the driver 52 is respectively connected to the motor power supply controlled end of the motor 15, the motor 2 19, the electric telescopic rod 37, the motor 3 40 and the powder suction pump 22, a box cover is fixed by screws on the right end of the control box 48, and an industrial computer 53 is fixed by screws on the box cover;

[0098] The development board 50 is provided with a control module, which includes a control signal receiving module and a powder concentration signal receiving module. The control signal receiving module is used to receive a control signal input by an external computer. Further, the signal output end of the external computer is connected to a signal access pin of the control signal receiving module through a signal line. The powder concentration signal receiving module is used to receive powder concentration information sent by the powder concentration detector 30 in real time. Further, the transmission line of the powder concentration detector 30 is connected to the signal access pin of the powder concentration signal receiving module.

[0099] The control signal receiving module and the powder concentration signal receiving module are connected to the analysis and processing module, and the analysis and processing module is connected to the steering speed control module 1, the steering speed control module 2, the steering speed control module 3, the speed control module 1 and the speed control module 2;

[0100] The analysis and processing module is used to classify the control signals in the peripheral computer and distribute them to the steering speed control module 1, steering speed control module 2, steering speed control module 3, speed control module 1 and speed control module 2, and adapt the running speed of the spraying mechanism and the powder feeding mechanism in combination with the powder concentration information;

[0101] The steering speed control module 1 is used to control the operation of the lifting drive mechanism, wherein the signal output pin of the steering speed control module 1 is connected to the signal input end of the driver 52 connected to the electric telescopic rod 37 through a signal line; the steering speed control module 2 is used to control the operation of the powder feeding mechanism, wherein the signal output pin of the steering speed control module 2 is connected to the signal input end of the driver 52 connected to the motor 2 19 through a signal line; the speed control module 1 is used to control the operation of the spraying mechanism, wherein the signal output pin of the speed control module 1 is connected to the signal input end of the driver 52 connected to the motor 3 40 through a signal line; the steering speed control module 3 and the speed control module 2 are used to control the operation of the grade selection mechanism, wherein the signal output pin of the speed control module 2 is connected to the signal access end of the driver 52 connected to the motor of the powder suction pump 22 through a signal line, and the signal output pin of the steering speed control module 3 is connected to the signal input end of the driver 52 connected to the motor 1 15 through a signal line.

[0102] During the analysis and processing of the analysis and processing module, the calibrated powder concentration Q and the start-stop command are input into the control signal receiving module by the peripheral computer, and then input into the analysis and processing module. When the powder concentration D≥Q input in real time by the analysis and processing module and received by the powder concentration signal receiving module, the speed of the motor 40 is maintained at 50r / min, and the motor speed of the powder suction pump 22 is maintained at 300r / min; when the powder concentration D<Q input in real time by the analysis and processing module and received by the powder concentration signal receiving module, the speed of the motor 40 is increased by 10r / min for every powder concentration lower than 50mg / m³, and the motor speed of the powder suction pump 22 is increased by 20r / min. The upper limit of the speed of the motor 40 is 200r / min, and the upper limit of the motor speed of the powder suction pump 22 is 660r / min. The analysis and processing module issues speed control commands and start-stop commands to the speed control module 1 and the speed control module 2, and controls the motor connected to the motor 40 and the powder suction pump 22 respectively. The driver 52 is driven and executed.

[0103] After receiving the start-up instruction of the control motor 2 19 from the external computer, the analysis and processing module sends a control instruction to the steering speed control module 2, and the steering speed control module 2 sends an operation instruction to the driver 52 connected to the motor 2 19.

[0104] It is worth noting that, among the control instructions processed by the analysis and processing module, except for the steering speed control module 1 which has the longest extension instruction of the top rod of the electric telescopic rod 37, under the remaining instructions, the steering speed control module 1 and the steering speed control module 3 have the same operation drive form, both divided into 12 steps. When each step is executed, the top of the rotating plate 4 and the retaining ring 8 will be flush and located below the sieve hole 3 of the corresponding group. The aperture data of each sieve hole 3 is stored in the driver control program list in the external computer, and the aperture data of each sieve hole 3 is linked to the corresponding control step signal. When the corresponding sieve hole aperture data is selected, the analysis and processing module calculates the direction and number of revolutions from the current step to the target step, and issues operation instructions to the steering speed control module 1 and the steering speed control module 3.

[0105] The working principle of this embodiment is as follows:

[0106] The Chinese medicine powder screening process of the present invention first performs rotary drying on the Chinese medicine powder, performs iron removal and pre-screening operations after drying, and performs grade screening through a Chinese medicine powder screening device, which can not only accelerate the screening speed, but also is more convenient in adjusting the screening fineness.

[0107] The Chinese medicine powder screening device of the present invention has a plurality of sieve holes 3 arranged on the screening cylinder 2 from bottom to top, and the fineness of the Chinese medicine powder particles can be quickly adjusted by the cooperation of the lifting drive mechanism and the grading mechanism, and the cooperation of the spraying mechanism and the grading mechanism can not only quickly screen out the qualified Chinese medicine powder particles, but also prevent the sieve holes 3 from being blocked by unqualified Chinese medicine particles.

[0108] In addition, driven by the lifting drive mechanism, when the insertion rod 35 is inserted into the insertion port, the top cover 31 and the top plate 33 are vertically combined with each other, and when the bolt 32 is screwed out of the slot, the lifting drive mechanism drives the top cover 31 and the top plate 33 to move upward as a whole, making it convenient to add Chinese medicine powder into the screening cylinder 2 and to remove unqualified Chinese medicine powder from the screening cylinder 2.

[0109] 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 Chinese medicine powder screening device, characterized in that: It comprises a pedestal (1), a screening cylinder (2) being arranged on one side of the upper part of the pedestal (1), a plurality of groups of screening holes (3) being evenly arranged vertically on the screening cylinder (2), and the inner diameters of the holes in the plurality of groups of screening holes (3) on the screening cylinder (2) gradually decrease from bottom to top; The top of the screening cylinder (2) is detachably provided with a top cover (31), and the top cover (31) is detachably provided with a top plate (33), and the pedestal (1) is provided with a lifting drive mechanism, and the lifting drive mechanism is used to drive the top plate (33) and the top cover (31) to perform lifting operations; A spray mechanism is provided in the top plate (33) and the sieving cylinder (2), and the spray mechanism is used to deliver and spray the Chinese medicine powder particles in the sieving cylinder (2) toward the sieve holes (3); A powder feeding mechanism is provided on one side of the upper portion of the screening cylinder (2), and the powder feeding mechanism is used to add Chinese medicine powder particles into the screening cylinder (2); The pedestal (1) and the screening cylinder (2) are provided with a grading mechanism, the grading mechanism being used to grade the sieve holes (3) on the screening cylinder (2) and to absorb and collect the sieved Chinese medicine powder particles; The pedestal (1) is provided with a control mechanism, which is used to control the operation of the lifting drive mechanism, the spraying mechanism, the powder feeding mechanism and the grade selection mechanism; The spray mechanism comprises a rotating plate (4) arranged in a screening cylinder (2), a middle section pipe (5) being arranged at the center of the rotating plate (4), a row of pipes (6) being arranged on the middle section pipe (5) in an annularly uniform manner, and bristles (7) being evenly arranged at the ends of the row of pipes (6), the bristles (7) being in sliding contact with the screening cylinder (2); The grading mechanism comprises a retaining ring (8) sleeved on the screening cylinder (2), the inner wall of the retaining ring (8) being provided with a closing ring (9), the closing ring (9) being attached to the outer wall of the screening cylinder (2), and a top ring (10) being provided on the upper part of the screening cylinder (2); The pedestal (1) is connected to a slide bar (13) and the slide bar (13) passes through a retaining ring (8); the top of the slide bar (13) is connected to a top ring (10); an air guide ring (11) is arranged on the outside of the retaining ring (8); the top of the air guide ring (11) is connected to a telescopic tube (12) and the top of the telescopic tube (12) is connected to the bottom of the top ring (10); A powder suction pump (22) is arranged on the pedestal (1), and a powder suction end of the powder suction pump (22) is connected to a side of the air guide ring (11) via a suction pipe (23).

2. The Chinese medicine powder screening device according to claim 1, characterized in that: The top cover (31) is sleeved on the top of the screening drum (2), bolts (32) are screwed on both sides of the screening drum (2), slide grooves are provided on both sides of the top plate (33), sliders (34) are slidably provided in the slide grooves, insertion openings are provided on both sides of the top cover (31), and a plug rod (35) is connected to the bottom of the slider (34), the plug rod (35) is a rod pile structure with a convex head provided at the lower end, and the plug rod (35) is inserted into the insertion opening.

3. The Chinese medicine powder screening device according to claim 2, characterized in that: The lifting drive mechanism comprises an electric telescopic rod (37) arranged on one side of the pedestal (1), a top rod of the electric telescopic rod (37) being connected to a connecting plate (36), and one end of the connecting plate (36) being connected to the top plate (33).

4. The Chinese medicine powder screening device according to claim 3, characterized in that: The spray mechanism further comprises a conduit (38) connected to the top of the middle section pipe (5), the conduit (38) slidingly passing through the center of the top cover (31), the conduit (38) rotatably arranged on the top plate (33), a cover (39) arranged on the top plate (33), a motor three (40) arranged on one side of the top of the cover (39), a rotor shaft of the motor three (40) passing through the cover (39) and connected to a gear one (41), a gear two (42) arranged on the conduit (38), and the gear one (41) meshing with the gear two (42); A support frame (46) is connected to one side of the top plate (33), a connecting pipe (44) is arranged on the support frame (46), the lower end of the connecting pipe (44) is rotatably arranged on the top of the guide tube (38), and the connecting pipe (44) is connected to an external compressed air pump through a soft pipe (45).

5. The Chinese medicine powder screening device according to claim 4, characterized in that: The powder feeding mechanism comprises a through pipe (17) connected to one side of the upper part of the screening cylinder (2), a cover is provided at one end of the through pipe (17), a guide hopper (18) is provided at the top of the through pipe (17), a second motor (19) is provided on the cover, a rotor shaft of the second motor (19) passes through the cover and is connected to an auger shaft (20), and a soft cover (21) is provided at one end of the auger shaft (20).

6. The Chinese medicine powder screening device according to claim 5, characterized in that: The grade selection mechanism further comprises a motor 1 (15) arranged at the bottom of the pedestal (1), the rotor shaft of the motor 1 (15) being connected to a lead screw (16) and the lead screw (16) being screwed to one side of the retaining ring (8), and the top of the lead screw (16) being rotatably arranged on the top ring (10); The slide bar (13) and the lead screw (16) are both sleeved with a telescopic outer cover (14), and the upper and lower ends of the telescopic outer cover (14) are bonded to the retaining ring (8) and the top ring (10) by means of a sealant; A storage box (24) is arranged on the pedestal (1) and near the powder suction pump (22); a powder discharge end of the powder suction pump (22) is connected to the storage box (24); a rotating ring (25) is screwed on the top of the storage box (24); rotating rods (26) are evenly arranged in a circumferential direction on the outside of the rotating ring (25); A filter plate (27) is arranged inside the rotating ring (25), a support ring (28) is arranged on the storage box (24), and the bottom of the rotating ring (25) is pressed tightly against the support ring (28); A powder concentration detector (30) is provided on one side of the storage box (24) and at a position corresponding to the powder discharge end of the powder suction pump (22).

7. The Chinese medicine powder screening device according to claim 6, characterized in that: The control mechanism comprises a support column (47) connected to the pedestal (1); a control box (48) is connected to the top of the support column (47); a protection box (49) is arranged in the control box (48); a development board (50) is arranged in the protection box (49); a protection frame (51) is arranged at the inner bottom of the control box (48); a driver (52) is arranged in the protection frame (51); and an industrial computer (53) is arranged on the cover of the control box (48); The development board (50) is provided with a control module, the control module comprising a control signal receiving module and a powder concentration signal receiving module, the control signal receiving module is used to receive a control signal input from an external computer, and the powder concentration signal receiving module is used to receive powder concentration information sent by a powder concentration detector (30) in real time; The control signal receiving module and the powder concentration signal receiving module are connected to the analysis and processing module, and the analysis and processing module is connected to the steering speed control module 1, the steering speed control module 2, the steering speed control module 3, the speed control module 1 and the speed control module 2; The analysis and processing module is used to classify the control signals in the external computer and distribute them to the steering speed control module 1, the steering speed control module 2, the steering speed control module 3, the speed control module 1 and the speed control module 2, and adapt the running speed of the spraying mechanism and the powder feeding mechanism in combination with the powder concentration information; The steering speed control module 1 is used to control the operation of the lifting drive mechanism, the steering speed control module 2 is used to control the operation of the powder feeding mechanism, the speed control module 1 is used to control the operation of the spraying mechanism, and the steering speed control module 3 and the speed control module 2 are used to control the operation of the grade selection mechanism.

8. A Chinese medicine powder screening process using the Chinese medicine powder screening device according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: Dry the Chinese medicine powder; Step 2: Remove iron from the Chinese medicine powder and pre-screen it; Step 3: Selecting a screening fineness on the Chinese medicine powder screening device, continuously adding powdered Chinese medicine to the Chinese medicine powder screening device, and further screening the powdered Chinese medicine through the Chinese medicine powder screening device; Step 4: Clean the retained and unqualified Chinese medicine powder particles in the Chinese medicine powder screening device, and take out the qualified Chinese medicine powder particles that have passed the screening; Step 5: Remove iron and dry the sieved Chinese medicine powder.

9. The Chinese medicine powder screening process according to claim 8, characterized in that: In the step 1, a double-cone rotary dryer is used to dry the Chinese medicine powder particles, and the heating and drying temperature is 80°C.

10. The Chinese medicine powder screening process according to claim 9, characterized in that: In the step 2, a drawer-type powder deironing device is used to remove iron, and the number of deironing times is at least 3 times. A rotary vibrating screen with a screening accuracy of 160 μm is used to vibrate and screen the deironed Chinese medicine powder particles to screen out unqualified Chinese medicine powder particles.

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