An automated microwave drying equipment for traditional Chinese medicine decoction pieces processing and its control system

Abstract

The present invention provides an automatic microwave drying device for processing traditional Chinese medicine decoction pieces and its control system, belonging to the technical field of drying equipment for traditional Chinese medicine decoction pieces. It includes a dryer body, a first conveyor belt and a second conveyor belt. The first conveyor belt passes through the dryer body. A feeding hopper is arranged at the feeding end of the first conveyor belt outside the dryer body. The second conveyor belt is arranged in parallel on one side of the first conveyor belt, and the feeding end of the second conveyor belt is located inside the dryer body. A receiving platform is arranged at the discharging ends of the first conveyor belt and the second conveyor belt outside the dryer body; it further includes a return conveyor belt, a screening assembly and a feeding assembly, which can continuously dry the traditional Chinese medicine decoction pieces under the condition that the dryer body does not stop, and send out the decoction pieces until the set value of the moisture content is reached, without the need for operators to transfer the decoction pieces through manual operation, improving the drying efficiency of the decoction pieces and reducing the workload of workers.

Description

Technical Field

[0001] The present invention relates to the technical field of traditional Chinese medicine decoction pieces drying equipment, and particularly relates to an automatic microwave drying equipment for processing traditional Chinese medicine decoction pieces and its control system. Background Art

[0002] Traditional Chinese medicine decoction pieces are traditional Chinese medicines that have been processed and prepared according to traditional Chinese medicine theory and traditional Chinese medicine processing methods and can be directly used in clinical practice of traditional Chinese medicine. Current decoction piece manufacturing enterprises have greatly improved the production efficiency of traditional Chinese medicine decoction pieces through various automatic equipment, and can mass-produce various decoction pieces that meet the pharmaceutical standards for use in drug extraction, steaming, etc. in hospitals, clinics, pharmacies, etc.

[0003] During the automatic processing of traditional Chinese medicine decoction pieces, operations such as moistening, cutting, and drying of medicinal materials are required. In the drying process, commonly used equipment includes vacuum dryers, hot air dryers, and microwave dryers, etc. Microwave dryers can directly act on medicinal materials and heat and evaporate the moisture inside and outside the medicinal materials. Compared with vacuum dryer equipment, it is economical and affordable. Compared with hot air dryers, it has high drying efficiency and can better preserve the beneficial components of medicinal materials, and is gradually loved by enterprises.

[0004] However, due to the overall irregular shape of the medicinal materials, there is still a large volume difference between the decoction pieces after cutting, and the inconsistent stacking height of the decoction pieces when they are conveyed on the conveyor belt through the microwave dryer will also cause differences in the drying efficiency of the decoction pieces. In order to avoid burning the medicinal materials and losing the effective components due to too high heating temperature, the staff usually set the temperature of the microwave dryer at a relatively low value. After the decoction pieces pass through the microwave dryer, the staff needs to check the drying situation of the decoction pieces and manually collect the decoction pieces with higher humidity, and then send them into the microwave dryer again for repeated drying, which increases the workload of the staff and affects the efficiency of drying the decoction pieces. Summary of the Invention

[0005] In view of the above problems in the prior art, the present invention provides an automatic microwave drying equipment for processing traditional Chinese medicine decoction pieces and its control system.

[0006] In order to achieve the above invention purpose, the technical scheme adopted by the present invention is as follows:

[0007] In the first aspect, the present application provides an automatic microwave drying equipment for processing traditional Chinese medicine decoction pieces, including a dryer body, a first conveyor belt, and a second conveyor belt. The first conveyor belt penetrates through the dryer body. A feeding hopper is arranged at the feeding end of the first conveyor belt outside the dryer body. The second conveyor belt is arranged in parallel on one side of the first conveyor belt. The feeding end of the second conveyor belt is located inside the dryer body. A receiving platform is arranged at the discharging ends of the first conveyor belt and the second conveyor belt outside the dryer body;

[0008] It further includes a return conveyor belt. The feeding end of the return conveyor belt is close to the discharging end of the first conveyor belt, and the return conveyor belt extends parallel to the feeding direction of the second conveyor belt towards the feeding end of the second conveyor belt.

[0009] A screening assembly is provided between the discharging ends of the first conveyor belt and the second conveyor belt and the receiving platform. The discharging end of the first conveyor belt is separated into a plurality of discharging channels by a number of partition plates. Above the discharging end of the first conveyor belt, there are infrared on-line moisture measuring instruments corresponding to the discharging channels one by one and capable of detecting the moisture content of the Chinese herbal pieces passing through the discharging channels. When the infrared on-line moisture measuring instrument detects that the moisture content of the Chinese herbal pieces in the discharging channel exceeds the set value, the wet Chinese herbal pieces in the corresponding discharging channel are transferred to the return conveyor belt through the screening assembly.

[0010] On one side of the dryer body, there is a feeding assembly for lifting and moving the Chinese herbal pieces on the return conveyor belt into the second conveyor belt inside the dryer body.

[0011] Further, the screening assembly includes a number of groups of guiding boxes corresponding to each discharging channel one by one and a driving member. The side surface of the guiding box is D-shaped, the inside of the guiding box is hollow, the plane where the straight side of the D shape of the guiding box is located is open and faces the dryer body, the outer top wall of the guiding box is an inclined surface that slopes downward from the dryer body towards the receiving platform, the inner bottom wall of the guiding box is an inclined surface that slopes downward from the receiving platform towards the dryer body. The driving member is arranged below the guiding box and is used to drive the guiding box to lift vertically. A receiving hopper is also fixedly arranged below the guiding box. The upper opening of the receiving hopper faces the guiding box, and the lower opening faces the feeding end of the return conveyor belt.

[0012] Further, a brush piece is horizontally arranged on the upper edge of the side of the guiding box close to the dryer body.

[0013] Further, the feeding assembly includes a movable support and a receiving conveyor belt and a hoist installed on the movable support. A track is fixedly arranged below the dryer body along the feeding direction of the first conveyor belt. The movable support is installed on the track by rollers in a rolling manner. A first driving motor for driving at least one roller to rotate is arranged on the movable support. The receiving conveyor belt is vertically arranged on one side of the return conveyor belt and the upper plane is lower than the upper plane of the return conveyor belt. At least one discharging plate is fixedly arranged on the side of the receiving conveyor belt close to the downstream of the return conveyor belt. The discharging plate extends above the return conveyor belt, and a discharging inclined surface that gradually slopes from the side far away from the receiving conveyor belt to the other side along the feeding direction of the return conveyor belt is formed on the discharging plate. The hoist is connected to the discharging end of the receiving conveyor belt. The discharging end at the top of the hoist is connected to the inside of the dryer body through a return pipe and is located directly above the second conveyor belt.

[0014] Further, a strip-shaped hole is formed in the top wall of the dryer body along the conveying direction of the second conveyor belt. An installation plate is slidably arranged in the strip-shaped hole along the length direction of the strip-shaped hole. The return pipe passes through the installation plate and is fixedly connected to the installation plate. Microwave shielding components capable of closing the strip-shaped hole by expansion and contraction are arranged on both sides of the installation plate in the strip-shaped hole.

[0015] Further, the microwave shielding component includes two fixed plates and a plurality of movable plates. The two fixed plates are respectively fixedly connected to one end of the strip-shaped hole and one side edge of the installation plate. A guiding groove is formed in one side surface of the movable plate along the length direction of the strip-shaped hole, and a guiding block is fixedly arranged on the other side surface. The movable plate is slidably connected to the adjacent movable plate and / or the fixed plate through the guiding block and the guiding groove. Microwave shielding film layers are arranged on the installation plate, the fixed plates and the movable plates.

[0016] Further, the screening component extends between the second conveyor belt and the receiving platform. The discharging end on the second conveyor belt is also separated into a plurality of discharging channels by a plurality of partitions. Infrared on-line moisture measuring instruments corresponding to each discharging channel are arranged above each discharging channel on the second conveyor belt.

[0017] In a second aspect, the present application provides a control system for an automatic microwave drying device for processing traditional Chinese medicine decoction pieces, which is applied to an automatic microwave drying device for processing traditional Chinese medicine decoction pieces provided in the first aspect of the present application. The control system includes: a collection module, a processing module and an execution module. The execution module at least includes a lifting drive unit capable of respectively driving the guiding box to lift;

[0018] The collection module is used for collecting the moisture content of the decoction pieces passing through a plurality of discharging channels, and obtaining a plurality of moisture content data corresponding to the plurality of discharging channels one by one;

[0019] The processing module is used for receiving the plurality of moisture content data sent by the collection module, and when confirming that at least one moisture content is greater than the set value, sending a first driving signal to the lifting drive unit;

[0020] The lifting drive unit, in response to the first driving signal sent by the processing module, drives the guiding box on the discharging channel corresponding to the moisture content data with the moisture content greater than the set value to rise and then descend after a delay period.

[0021] Further, the execution module further includes a moving drive unit, and the moving drive unit is used for driving the movable bracket to move on the track;

[0022] The processing module is further used for, according to the moisture content data of each discharging channel at a plurality of moments sent by the collection module within a period of time, when determining that the moisture content of the decoction pieces passing through at least one discharging channel at at least one moment is greater than the set value, sending a second driving signal to the moving drive unit;

[0023] The moving drive unit drives the movable support to move on the track in response to the second drive signal sent by the processing module.

[0024] Furthermore, the system further includes a storage module for storing the one-to-one correspondence between multiple moisture contents and the positions of the movable support on the track.

[0025] The processing module is further configured to, when determining that the moisture content of the cut pieces passing through at least one discharge channel at at least one moment is greater than the set value, compare to find the target moisture content that is greater than the set value and closest to the set value, and send a target drive signal containing the corresponding target position of the movable support on the track corresponding to the target moisture content to the moving drive unit.

[0026] The moving drive unit controls the movable support to move to the target position on the track in response to the target drive signal sent by the processing module.

[0027] The beneficial effects of the present invention are as follows: The discharge ends of the first conveyor belt and the second conveyor belt are divided into multiple discharge channels to divide the cut pieces into small amounts and multiple segments. Then, the infrared on-line moisture measuring instrument is used to real-time detect the moisture content of the cut pieces passing through the discharge channels. When the detected moisture content is higher than the set value, the guiding box is controlled to rise, so that the cut pieces in the corresponding discharge channel fall onto the return conveyor belt after being guided by the guiding box, and then the cut pieces are lifted into the second conveyor belt in the dryer body through the feeding assembly. When the cut pieces pass through the second conveyor belt, they continue to be dried by microwave heating until the cut pieces are dried to a moisture content below the set value, and then the cut pieces can be discharged to the receiving platform. There is no need for operators to transfer the cut pieces manually. Without changing the parameter settings of the dryer body, the drying of the cut pieces can be continuously completed, improving the drying efficiency of the cut pieces and reducing the workload of workers. Description of the Drawings

[0028] Figure 1 It is a schematic diagram of the overall structure of the automatic microwave drying equipment according to Embodiment 1 of the present application;

[0029] Figure 2 It is a schematic diagram of the overall structure of the automatic microwave drying equipment from another perspective according to Embodiment 1 of the present application;

[0030] Figure 3 It is Figure 2 The enlarged schematic diagram of Part A;

[0031] Figure 4 It is a schematic diagram of the partial structure of the receiving platform and the screening assembly according to Embodiment 1 of the present application;

[0032] Figure 5 It is a schematic diagram of the partial structure of the conveying assembly and the microwave shielding assembly according to Embodiment 1 of the present application;

[0033] Figure 6For Figure 5 Schematic enlarged view of part B of

[0034] Figure 7 Schematic diagram of the logic circuit for manually controlling the moving state of the movable bracket in the control system of the automatic microwave drying equipment in Embodiment 2 of the present application;

[0035] Figure 8 Schematic diagram of the logic circuit for automatically controlling the moving state of the movable bracket in the control system of the automatic microwave drying equipment in Embodiment 2 of the present application.

[0036] Wherein, 1 is the dryer body; 11 is the feeding hopper; 12 is the receiving platform; 13 is the strip hole; 2 is the first conveyor belt; 3 is the second conveyor belt; 4 is the return conveyor belt; 5 is the screening assembly; 51 is the guiding box; 52 is the driving member; 53 is the receiving hopper; 54 is the brush piece; 6 is the partition; 61 is the discharge channel; 62 is the infrared on-line moisture measuring instrument; 7 is the feeding assembly; 71 is the movable bracket; 72 is the receiving conveyor belt; 73 is the elevator; 74 is the track; 75 is the roller; 76 is the discharge plate; 77 is the return pipe; 78 is the mounting plate; 8 is the microwave shielding assembly; 81 is the fixing plate; 82 is the movable plate; 83 is the guiding groove; 84 is the guiding block; 101 is the acquisition module; 102 is the processing module; 103 is the execution module; 104 is the lifting drive unit; 105 is the moving drive unit; 106 is the storage module. Specific embodiments

[0037] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the accompanying drawings of the specification and specific embodiments.

[0038] Embodiment 1

[0039] The embodiment of the present invention provides an automatic microwave drying equipment for processing traditional Chinese medicine decoction pieces. Referring to Figure 1 , it includes a dryer body 1, a first conveyor belt 2 and a second conveyor belt 3. The dryer body 1 is hollow inside, and one end in the horizontal direction is provided with an inlet and the other end is provided with an outlet. The first conveyor belt 2 penetrates through the dryer body 1. The feeding end of the first conveyor belt 2 passes out of the inlet of the dryer body 1, and the discharging end passes out of the outlet of the dryer body 1. The second conveyor belt 3 is arranged in parallel on one side of the first conveyor belt 2. The feeding end of the second conveyor belt 3 is located inside the dryer body 1, and the discharging end passes out of the outlet of the dryer body 1. A microwave generator is installed inside the dryer body 1 above the first conveyor belt 2 in the direction towards the second conveyor belt 3. An exhaust pipe is also connected to the top of the dryer body 1 for discharging the steam generated during the drying process.

[0040] Outside the dryer body 1 and above the feeding end of the first conveyor belt 2, a blanking hopper 11 is fixedly installed. The bottom of the blanking hopper 11 is open. By putting traditional Chinese medicine pieces into the blanking hopper 11, when the first conveyor belt 2 works, the pieces are taken out from the bottom opening of the blanking hopper 11 and conveyed towards the dryer body 1. On the outside of the dryer body 1 and on the side far from the dryer body 1 at the discharging ends of the first conveyor belt 2 and the second conveyor belt 3, a receiving platform 12 is also fixedly installed, which is used to receive the pieces conveyed outwards from the discharging ends of the first conveyor belt 2 and the second conveyor belt 3.

[0041] Refer to Figure 2 、 3 , a return conveyor belt 4 is arranged below the dryer body 1. The conveying direction of the return conveyor belt 4 is opposite to the conveying directions of the first conveyor belt 2 and the second conveyor belt 3. The feeding end of the return conveyor belt 4 extends to the lower part of the discharging ends of the first conveyor belt 2 and the second conveyor belt 3. A screening assembly 5 is also arranged between the discharging ends of the first conveyor belt 2 and the second conveyor belt 3 and the receiving platform 12, which can switch the pieces sent out from the discharging ends of the first conveyor belt 2 and the second conveyor belt 3 between being sent to the receiving platform 12 and the feeding end of the return conveyor belt 4.

[0042] An installation bracket is erected above the discharging ends of the first conveyor belt 2 and the second conveyor belt 3. Along the width direction of the dryer body 1, a plurality of partition plates 6 are fixedly installed at intervals on the installation bracket. The partition plates 6 are parallel to the conveying directions of the first conveyor belt 2 and the second conveyor belt 3, dividing the discharging ends of the first conveyor belt 2 and the second conveyor belt 3 into a plurality of discharging channels 61. An infrared on-line moisture measuring instrument 62 is also fixedly installed on the installation bracket by means of bolts and other installation methods. Above each discharging channel 61, an infrared on-line moisture measuring instrument 62 is correspondingly installed, so as to be able to detect the moisture content of the pieces passing through each discharging channel 61 respectively.

[0043] It also includes a control terminal, which can be a computer or a PLC controller. Each infrared on-line moisture measuring instrument 62 is electrically connected to the control terminal respectively, and is used to collect the moisture content of the pieces passing through the discharging channel 61 in real time. And a set value can be set through the control terminal. The set value can be the maximum allowable moisture content value when the pieces are dried qualified. The control terminal is communicatively connected to the screening assembly 5. When an infrared on-line moisture measuring instrument 62 detects that the moisture content of the pieces in the corresponding discharging channel 61 is higher than the set value, a signal is sent from the control terminal to the screening assembly 5 to transfer and cut the pieces with a moisture content higher than the set value in the corresponding discharging channel 61 onto the return conveyor belt 4.

[0044] On one side of the return conveyor belt 4, there is also a feeding component 7. The feeding component 7 is used to lift the cut herbs conveyed on the return conveyor belt 4 and send them onto the second conveyor belt 3 inside the dryer body 1. After the cut herbs are sent onto the second conveyor belt 3, the dryer body 1 continues to microwave-dry the cut herbs. After the moisture content of the cut herbs is lower than the set value, the cut herbs can be sent from the discharge end of the first conveyor belt 2 or the second conveyor belt 3 to the receiving platform 12, completing the drying operation of the cut herbs. There is no need for workers to readjust the parameters and perform secondary drying on the cut herbs after all the cut herbs are dried once, improving the drying efficiency of the cut herbs and the working efficiency of the operators.

[0045] Referring to Figure 4 , specifically, the screening component 5 includes a number of groups of guiding boxes 51 corresponding one-to-one to each discharge channel 61 and a driving member 52. The cross-section of the guiding box 51 is D-shaped, the inside of the guiding box 51 is hollow, and one side of the D-shaped straight long side of the guiding box 51 is designed with an opening. The guiding box 51 is located on one side of the discharge ends of the first conveyor belt 2 and the second conveyor belt 3, and the D-shaped straight long side of the guiding box 51 faces the first conveyor belt 2 or the second conveyor belt 3. The outer top wall of the guiding box 51 is an inclined surface that slopes downward from the dryer body 1 towards the receiving platform 12. When the guiding box 51 descends until the upper edge of the guiding box 51 is located below the discharge ends of the first conveyor belt 2 and the second conveyor belt 3, after the cut herbs are sent out from the discharge ends of the first conveyor belt 2 and the second conveyor belt 3, they fall onto the receiving platform 12 after being guided by the upper side wall of the guiding box 51, completing the transfer and collection of the cut herbs to the receiving platform 12. The inner bottom wall of the guiding box 51 is an inclined surface that slopes downward from the receiving platform 12 towards the dryer body 1. When the guiding box 51 rises until the discharge ends of the first conveyor belt 2 and the second conveyor belt 3 are located in the middle of the opening of the guiding box 51, the cut herbs are sent from the discharge ends of the first conveyor belt 2 and the second conveyor belt 3 into the inside of the guiding box 51 and are sent out from the lower half of the opening of the guiding box 51 to the return conveyor belt 4. A receiving hopper 53 is also provided between the guiding box 51 and the return conveyor belt 4. The upper opening of the receiving hopper 53 faces the guiding box 51, and the lower opening faces the feeding end of the return conveyor belt 4, so as to effectively collect and transfer the cut herbs.

[0046] In the embodiment of the present application, the driving member 52 is a cylinder. The cylinder is vertically and fixedly installed on the installation platform extending below the receiving platform 12 through bolts. The piston rod of the cylinder is fixedly connected to the bottom of the guiding box 51. The control terminal controls the intake direction of the gas in the cylinder, thereby controlling the lifting of the piston rod of the cylinder. In other embodiments, the driving member 52 can also be an electric push rod, a hydraulic cylinder, a linear slide rail, etc.

[0047] Furthermore, a brush piece 54 is horizontally and integrally fixed to the upper edge of the side of the guiding box 51 close to the dryer body 1. When the upper edge of the guiding box 51 descends below the discharging ends of the first conveyor belt 2 and the second conveyor belt 3, the edge of the brush piece 54 away from the guiding box 51 remains in sliding contact with the outer wall of the first conveyor belt 2 or the second conveyor belt 3 to ensure that the cut pieces can be smoothly fed onto the receiving platform 12.

[0048] Refer to Figure 5 、 6 In the embodiment of the present application, the feeding assembly 7 includes a movable bracket 71, a receiving conveyor belt 72 and a hoist 73 mounted on the movable bracket 71. On the ground below the dryer body 1, a track 74 is fixedly installed parallel to the feeding direction of the return conveyor belt 4. A roller 75 is rotatably installed at the bottom of the movable bracket 71. The movable bracket 71 is rollingly installed on the track 74 through the roller 75. A first driving motor is fixedly installed on the outer wall of the movable bracket 71 by bolts. The first driving motor can drive at least one roller 75 to rotate so that the movable bracket 71 can horizontally move along the length direction of the track 74. The receiving conveyor belt 72 is vertically arranged on one side of the return conveyor belt 4 and its upper plane is lower than the upper plane of the return conveyor belt 4. At least one discharging plate 76 is fixedly arranged on the side of the receiving conveyor belt 72 close to the downstream of the return conveyor belt 4. The discharging plate 76 extends above the return conveyor belt 4. A discharging inclined surface is formed on the discharging plate 76 which is gradually inclined from the side away from the receiving conveyor belt 72 to the other side along the feeding direction of the return conveyor belt 4. When the return conveyor belt 4 conveys the cut pieces to the position of the discharging plate 76, the cut pieces are scraped and guided by the discharging plate 76 and fall onto the receiving conveyor belt 72. In the embodiment of the present application, the discharging plate 76 is provided with three pieces, and the inclination angles of the three discharging plates 76 are different to improve the scraping effect on the cut pieces on the return conveyor belt 4.

[0049] The hoist 73 is connected to the discharging end of the receiving conveyor belt 72. The top of the hoist 73 is the discharging end of the hoist 73. A return pipe 77 is connected to the discharging end at the top of the hoist 73. The hoist 73 is connected into the dryer body 1 through the return pipe 77 and is located directly above the second conveyor belt 3. The hoist 73 can adopt a bucket elevator 73. The structure of the bucket elevator 73 is a conventional technology and will not be elaborated here. Both the first conveyor belt 2 and the second conveyor belt 3 are belt-type conveyor belts, which are composed of rollers at both ends, a belt wound around the rollers, and a driving motor for driving any one of the rollers to rotate. The first conveyor belt 2 and the second conveyor belt 3 in the dryer body 1 are supported by a support plate located below the upper belt surface to support the belt. The return conveyor belt 4 and the receiving conveyor belt 72 can be belt-type conveyor belts or chain-type conveyor belts for conveying the cut pieces.

[0050] On the top wall of the dryer body 1, a strip-shaped hole 13 is opened along the conveying direction of the second conveyor belt 3. An installation plate 78 is slidably installed in the strip-shaped hole 13 along the length direction of the strip-shaped hole 13. The return pipe 77 passes through the installation plate 78 and is fixedly connected to the installation plate 78. Microwave shielding components 8 are arranged on both sides of the installation plate 78 in the strip-shaped hole 13. Through the microwave shielding components 8, the space on both sides of the strip-shaped hole 13 is closed during the movement of the installation plate 78 in the strip-shaped hole 13, so as to prevent the microwave in the dryer body 1 from leaking from the strip-shaped hole 13.

[0051] In the embodiment of the present application, the microwave shielding component 8 includes two fixing plates 81 and several movable plates 82. The two fixing plates 81 are respectively fixedly connected to the end of the strip-shaped hole 13 and one side edge of the installation plate 78. The several movable plates 82 are arranged between the two fixing plates 81. A guiding groove 83 is opened along the length direction of the strip-shaped hole 13 on one side surface of the movable plate 82, and a guiding block 84 is fixedly arranged on the other side surface. The guiding groove 83 and the guiding block 84 are mutually adapted. Structures of the guiding groove 83 and the guiding block 84 are respectively arranged on the two fixing plates 81. When the guiding block 84 is matched with the guiding groove 83, the guiding block 84 can slide in the guiding groove 83 along the length direction of the guiding groove 83. The movable plate 82 is slidably connected to the adjacent movable plate 82 and / or the fixing plate 81 through the guiding block 84 and the guiding groove 83. Microwave shielding film layers are arranged on the fixing plate 81, the installation plate 78 and the movable plate 82. The microwave shielding film layers can be embedded in the plates or adhered to the surfaces of the plates by an adhesive bonding method. When the movable bracket 71 moves on the track 74, through the expansion and contraction of the microwave shielding component 8, the strip-shaped holes 13 on both sides of the installation plate 78 can be completely closed, maintaining a good shielding effect on the microwave in the dryer body 1.

[0052] Furthermore, a duckbill pipe opening is connected to the end of the return pipe 77 extending into the dryer body 1. The opening length direction of the duckbill pipe opening is parallel to the width direction of the second conveyor belt 3, so that the Chinese herbal pieces entering the dryer body 1 from the return pipe 77 can be evenly dropped on the second conveyor belt 3.

[0053] Furthermore, photoelectric sensors can be installed at the feeding end of the return conveyor belt 4 and the discharging end of the receiving conveyor belt 72 to mark the batches of the Chinese herbal pieces passing on the return conveyor belt 4 and the receiving conveyor belt 72, facilitating the control terminal to accurately identify and control the return of the Chinese herbal pieces to the second conveyor belt 3.

[0054] Embodiment 2

[0055] The embodiment of the present application also discloses a control system for an automatic microwave drying device for processing Chinese herbal pieces, which is applied to an automatic microwave drying device for processing Chinese herbal pieces provided in Embodiment 1 of the present application. Refer to Figure 7, including: a collection module 101, a processing module 102, and an execution module 103. The collection module 101 is an infrared on-line moisture measuring instrument 62 installed above the discharge end of the first conveyor belt 2 and the discharge end of the second conveyor belt 3. The processing module 102 is a control terminal. The execution module 103 at least includes a lifting drive unit 104 that can respectively drive the lifting of the guide box 51, and the lifting drive unit 104 is a cylinder.

[0056] The collection module 101 is used to collect the moisture content of the cut herbs passing through the multiple discharge channels 61, and obtain a plurality of moisture content data corresponding one by one to the multiple discharge channels 61. The processing module 102 is used to receive the multiple moisture content data sent by the collection module 101, and when it is confirmed that at least one moisture content is greater than the set value, send a first drive signal to the lifting drive unit 104. The set value is manually input by the staff at the control terminal, and the set value is the value of the maximum moisture content in the cut herb drying standard. The lifting drive unit 104, in response to the first drive signal sent by the processing module 102, drives the guide box 51 on the discharge channel 61 corresponding to the moisture content data greater than the set value to rise and then descend after a delay period. The delay time can be set by the staff at the control terminal. Further, it can also be set that the lifting drive unit 104 starts to delay after responding to the first drive signal to ensure that the wet cut herbs can be accurately sent into the guide box 51.

[0057] The movable support 71 can be manually controlled by the staff to move. The movable support 71 is moved to an appropriate position on the track 74. When the cut herbs are conveyed from the first conveyor belt 2 and the detected moisture content exceeds the set value, they are transferred to the return conveyor belt 4 and then sent back to the second conveyor belt 3 in the dryer body 1. After being dried twice by the second conveyor belt 3, they are discharged again and the moisture content is detected. The cut herbs with unqualified moisture content are still transferred to the return conveyor belt 4 for re-drying until the moisture content is qualified before being discharged onto the receiving platform 12. It can ensure that the moisture content of the sent cut herbs meets the standard, saving the operations of the workers in transferring the cut herbs and resetting the drying parameters, and completing the drying operation of all the cut herbs without stopping the dryer body 1, thereby improving the drying efficiency of the cut herbs.

[0058] Refer to Figure 8, Further, the execution module 103 further includes a mobile driving unit 105. The mobile driving unit 105 is used to drive the movable bracket 71 to move on the track 74, and the mobile unit is the first driving motor installed on the movable bracket 71. The processing module 102 is further used to, according to the moisture content data in each discharge channel 61 at multiple moments sent by the acquisition module 101 within a period of time, when it is determined that the moisture content of the cut pieces passing through at least one discharge channel 61 at at least one moment is greater than the set value, send a second driving signal to the mobile driving unit 105. The mobile driving unit 105, in response to the second driving signal sent by the processing module 102, drives the movable bracket 71 to move on the track 74.

[0059] The system further includes a storage module 106. The storage module 106 is integrated in the control terminal. The storage module 106 is used to store the one-to-one correspondence between multiple moisture contents and the positions of the movable bracket 71 on the track 74. The processing module 102 is further used to, when it is determined that the moisture content of the cut pieces passing through at least one discharge channel 61 at at least one moment is greater than the set value, compare and find the target moisture content that is greater than the set value and closest to the set value, and send a target driving signal containing the corresponding target position of the movable bracket 71 on the track 74 corresponding to the target moisture content to the mobile driving unit 105. The mobile driving unit 105, in response to the target driving signal sent by the processing module 102, controls the movable bracket 71 to move to the target position on the track 74.

[0060] When the moving position of the movable terminal on the track 74 is automatically controlled by the control terminal, the processing module 102 needs to record the change trajectory of the moisture content values measured by each infrared on-line moisture meter 62 within a period of time, such as 20 - 40 s. When it is confirmed that there are cut pieces with moisture content exceeding the set value within this period of time, obtain the target moisture content that exceeds the set value and is closest to the set value from the change trajectories of the moisture contents measured by each infrared on-line moisture meter 62. After querying the one-to-one correspondence between multiple moisture contents and the positions of the movable bracket 71 on the track 74 according to the target moisture content, obtain the corresponding target position of the movable bracket 71 on the track 74, and then the driving unit, in response to the target driving signal, controls the movable bracket 71 to move to the target position on the track 74. To complete the basic drying operation on the cut pieces with moisture content exceeding the set value and having the lowest moisture content, and to avoid over-drying of this part of the cut pieces resulting in burning of the cut pieces, move the movable bracket 71 to the position where the cut pieces with the lowest moisture content can just be dried, so as to complete the drying of this part of the cut pieces to the lowest extent. The cut pieces that are not completely dried will be sent back to the return conveyor belt 4 for multiple drying until the moisture content meets the standard, without the need for staff to manually adjust the position of the movable bracket 71, and can automatically and efficiently complete the drying operation of the cut pieces, improving the drying efficiency and drying effect of traditional Chinese medicine cut pieces.

[0061] Those skilled in the art will appreciate that although the preferred embodiments of the present invention have been described, additional changes and modifications can be made to these embodiments once the basic creative concept is known to those skilled in the art. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications falling within the scope of the present invention. Obviously, those skilled in the art can make various changes and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. An automated microwave drying device for traditional Chinese medicine decoction pieces processing, characterized in that, It includes a dryer body (1), a first conveyor belt (2) and a second conveyor belt (3). The first conveyor belt (2) runs through the dryer body (1). A feeding hopper (11) is arranged at the feeding end of the first conveyor belt (2) outside the dryer body (1). The second conveyor belt (3) is arranged in parallel on one side of the first conveyor belt (2). The feeding end of the second conveyor belt (3) is located inside the dryer body (1). A receiving platform (12) is arranged outside the dryer body (1) at the discharging ends of the first conveyor belt (2) and the second conveyor belt (3). It further includes a return conveyor belt (4). The feeding end of the return conveyor belt (4) is close to the discharging end of the first conveyor belt (2), and the return conveyor belt (4) extends parallel to the feeding direction of the second conveyor belt (3) towards the feeding end of the second conveyor belt (3). A screening assembly (5) is arranged between the discharging ends of the first conveyor belt (2) and the second conveyor belt (3) and the receiving platform (12). The discharging end of the first conveyor belt (2) is separated into a plurality of discharging channels (61) by a plurality of partition plates (6). Above the discharging end of the first conveyor belt (2), there is an infrared on-line moisture meter (62) corresponding to the discharging channels (61) one by one and capable of detecting the moisture content of the cut herbs passing through the discharging channels (61). When the infrared on-line moisture meter (62) detects that the moisture content of the cut herbs in the discharging channel (61) exceeds the set value, the wet cut herbs in the corresponding discharging channel (61) are transferred to the return conveyor belt (4) through the screening assembly (5). On one side of the dryer body (1), there is a feeding assembly (7) for lifting and moving the cut herbs on the return conveyor belt (4) into the second conveyor belt (3) inside the dryer body (1).

2. The automated microwave drying device for traditional Chinese medicine decoction pieces processing according to claim 1, characterized in that, The screening assembly (5) includes a plurality of groups of guiding boxes (51) corresponding to the discharging channels (61) one by one and a driving member (52). The side surface of the guiding box (51) is D-shaped. The inside of the guiding box (51) is hollow. The plane where the straight side of the D shape of the guiding box (51) is located is open and faces the dryer body (1). The outer top wall of the guiding box (51) is an inclined surface that slopes downward from the dryer body (1) towards the receiving platform (12). The inner bottom wall of the guiding box (51) is an inclined surface that slopes downward from the receiving platform (12) towards the dryer body (1). The driving member (52) is arranged below the guiding box (51) and is used to drive the guiding box (51) to move vertically up and down. A receiving hopper (53) is also fixedly arranged below the guiding box (51). The upper opening of the receiving hopper (53) faces the guiding box (51), and the lower opening faces the feeding end of the return conveyor belt (4).

3. The automated microwave drying device for traditional Chinese medicine decoction pieces processing according to claim 2, characterized in that, A brush piece (54) is horizontally arranged at the upper edge of the side of the guiding box (51) close to the dryer body (1).

4. The automated microwave drying device for traditional Chinese medicine decoction pieces processing according to claim 2, characterized in that, The feeding assembly (7) includes a movable bracket (71), a receiving conveyor belt (72) and an elevator (73) mounted on the movable bracket (71). A track (74) is fixedly arranged below the dryer body (1) along the feeding direction of the first conveyor belt (2). The movable bracket (71) is rollingly mounted on the track (74) through rollers (75). A first driving motor for driving at least one roller (75) to rotate is arranged on the movable bracket (71). The receiving conveyor belt (72) is vertically arranged on one side of the return conveyor belt (4), and the upper plane of the receiving conveyor belt (72) is lower than the upper plane of the return conveyor belt (4). At least one discharging plate (76) is fixedly arranged on the side of the receiving conveyor belt (72) close to the downstream of the return conveyor belt (4). The discharging plate (76) extends above the return conveyor belt (4), and a discharging inclined surface is formed on the discharging plate (76) which is gradually inclined from the side far away from the receiving conveyor belt (72) to the other side along the feeding direction of the return conveyor belt (4). The elevator (73) is connected to the discharging end of the receiving conveyor belt (72). The discharging end at the top of the elevator (73) is connected into the dryer body (1) through a return pipe (77) and is located directly above the second conveyor belt (3).

5. The automated microwave drying device for traditional Chinese medicine decoction pieces processing according to claim 4, characterized in that, A strip-shaped hole (13) is formed in the top wall of the dryer body (1) along the conveying direction of the second conveyor belt (3). A mounting plate (78) is slidably arranged in the strip-shaped hole (13) along the length direction of the strip-shaped hole (13). The return pipe (77) passes through the mounting plate (78) and is fixedly connected to the mounting plate (78). Microwave shielding assemblies (8) capable of being telescopically closed to close the strip-shaped hole (13) are arranged on both sides of the mounting plate (78) in the strip-shaped hole (13).

6. The automated microwave drying device for traditional Chinese medicine decoction pieces processing according to claim 5, characterized in that, The microwave shielding assembly (8) includes two fixing plates (81) and a plurality of movable plates (82). The two fixing plates (81) are respectively fixedly connected to one end of the strip-shaped hole (13) and one side edge of the mounting plate (78). A guiding groove (83) is formed in one side surface of the movable plate (82) along the length direction of the strip-shaped hole (13), and a guiding block (84) is fixedly arranged on the other side surface. The movable plate (82) is slidably connected to an adjacent movable plate (82) and / or the fixing plate (81) through the guiding block (84) and the guiding groove (83). Microwave shielding thin film layers are arranged on the mounting plate (78), the fixing plates (81) and the movable plates (82).

7. The automated microwave drying device for traditional Chinese medicine decoction pieces processing according to claim 4, characterized in that, The screening assembly (5) extends between the second conveyor belt (3) and the receiving platform (12). The discharging end of the second conveyor belt (3) is also separated into a plurality of discharging channels (61) by a plurality of partition plates (6). Infrared on-line moisture measuring instruments (62) corresponding to each discharging channel (61) are arranged above the second conveyor belt (3).

8. A control system for an automated microwave drying device for traditional Chinese medicine decoction pieces processing, characterized in that, Applied to an automated microwave drying device for processing traditional Chinese medicine decoction pieces as described in any one of claims 4-7, comprising: a collection module (101), a processing module (102), and an execution module (103), wherein the execution module (103) at least includes a lifting drive unit (104) for driving the lifting of the guiding box (51) respectively; The collection module (101) is used to collect the moisture content of the decoction pieces passing through multiple discharge channels (61), and obtain a plurality of moisture content data corresponding one-to-one to the multiple discharge channels (61); The processing module (102) is used to receive the plurality of moisture content data sent by the collection module (101), and when it is confirmed that at least one moisture content is greater than the set value, send a first drive signal to the lifting drive unit (104); The lifting drive unit (104), in response to the first drive signal sent by the processing module (102), drives the guiding box (51) on the discharge channel (61) corresponding to the moisture content data with a moisture content greater than the set value to rise and then descend after a delay period.

9. The control system for an automated microwave drying device for traditional Chinese medicine decoction pieces processing according to claim 8, characterized in that, The execution module (103) further includes a moving drive unit (105), and the moving drive unit (105) is used to drive the movable bracket (71) to move on the track (74); The processing module (102) is further used to, according to the moisture content data of each discharge channel (61) at multiple moments sent by the collection module (101) within a period of time, when it is determined that the moisture content of the decoction pieces passing through at least one discharge channel (61) at at least one moment is greater than the set value, send a second drive signal to the moving drive unit (105); The moving drive unit (105), in response to the second drive signal sent by the processing module (102), drives the movable bracket (71) to move on the track (74).

10. The control system for an automated microwave drying device for traditional Chinese medicine decoction pieces processing according to claim 9, characterized in that, The system further includes a storage module (106), and the storage module (106) is used to store the one-to-one correspondence between a plurality of moisture contents and the positions of the movable bracket (71) on the track (74); The processing module (102) is further used to, when it is determined that the moisture content of the decoction pieces passing through at least one discharge channel (61) at at least one moment is greater than the set value, compare to find the target moisture content that is greater than the set value and closest to the set value, and send a target drive signal including the corresponding target position of the movable bracket (71) on the track (74) corresponding to the target moisture content to the moving drive unit (105); The moving drive unit (105), in response to the target drive signal sent by the processing module (102), controls the movable bracket (71) to move to the target position on the track (74).

Images