Screening machine for processing traditional Chinese medicinal materials and use method of screening machine

Abstract

The invention discloses a screening machine for traditional Chinese medicine processing and a using method thereof, and relates to the field of traditional Chinese medicine processing. A screening machine for traditional Chinese medicinal material processing comprises a screening machine box, the upper end of one side of the screening machine box communicates with a feeding pipe, the side, away from the feeding pipe, of the screening machine box is rotationally connected with a discharging box door, the screening machine further comprises a screening plate which is connected into the screening machine box in a liftable mode, and the screening plate is located below the feeding pipe and the discharging box door; compared with the prior art, when processed traditional Chinese medicinal materials are placed on the screening plate to be subjected to screening and impurity removing treatment, the traditional Chinese medicinal materials and impurities can generate height difference under the action of gas resistance through gas jetted downwards, and due to the fact that the impurities fall down before the traditional Chinese medicinal materials, under the condition that the blocking action of the traditional Chinese medicinal materials is lacked, the traditional Chinese medicinal materials are separated from the impurities. And firstly falling impurities can better penetrate through the screening plate to fall to the bottom of the screening machine box, and the impurity screening efficiency is effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of traditional Chinese medicine processing, and in particular relates to a screening machine for preparing traditional Chinese medicine and a use method thereof. Background Art

[0002] Chinese medicine processing refers to the process of making medicines from Chinese herbal raw materials. There are processing methods such as fire processing, water processing, or water and fire processing. The main purpose is to enhance the efficacy of the medicine, reduce toxicity or side effects, and facilitate storage and administration.

[0003] After the Chinese medicinal materials are processed, in order to improve the quality of the medicine, enhance the efficacy, and facilitate storage and transportation, it is necessary to screen and remove the mixed impurities and impurities attached to the surface of the processed Chinese medicinal materials. With the development of science and technology, mechanical screening has gradually become the main method for screening Chinese medicine processing. However, in the prior art, when screening Chinese medicinal materials, vibration is mostly used to screen and remove impurities from Chinese medicinal materials. When the Chinese medicinal materials are vibrated and thrown up, since the mass of the impurities is less than the mass of the Chinese medicinal materials, the impurities will be thrown up higher than the Chinese medicinal materials, so that the Chinese medicinal materials will first fall and contact the screening plate. Since the Chinese medicinal materials are at the bottom and block the impurities, the impurities cannot quickly pass through the screening plate and separate from the Chinese medicinal materials, thereby affecting the screening efficiency of the Chinese medicinal materials. In view of this, the present invention is specially proposed. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a screening machine for preparing Chinese medicinal materials and a method of using the same which can overcome the above problems or at least partially solve the above problems.

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: a screening machine for preparing Chinese medicinal materials, including a screening box, an upper end of one side of the screening box is connected to a feed pipe, and a side of the screening box away from the feed pipe is rotatably connected to a discharge box door, and also includes: a screening plate, which can be raised and lowered and connected in the screening box, and the screening plate is located below the feed pipe and the discharge box door; an air storage chamber is opened at the upper end of the interior of the screening box, and a plurality of rows of nozzles are equidistantly connected to the lower end of the air storage chamber.

[0006] Furthermore, it also includes a motor, a rotating rod, a first eccentric disk and a first T-bar, the motor is fixedly connected to one side of the screening box through a bracket, the rotating rod is rotatably connected inside the screening box and is located below the screening plate, the rotating rod extends out of the screening box at one end close to the bracket and is fixedly connected to the output end of the motor, the first eccentric disk is symmetrically fixedly connected to both sides of the rotating rod, a circle of first T-slots is provided on the first eccentric disk, the first T-bar is slidably connected in the first T-slot of the first eccentric disk, and the upper end of the first T-bar is fixedly connected to the bottom of the screening plate.

[0007] Furthermore, it also includes an air cylinder and a first piston rod with a piston. The air cylinder is equidistantly arranged on both sides of the lower end of the air storage chamber and is fixedly connected to the inner wall of the screening box. The first piston rod is slidably connected in the air cylinder, and the lower end of the first piston rod is fixedly connected to the screening plate. Check valves are provided in the air inlet and outlet of the air cylinder, and the air outlet of the air cylinder is connected to the air inlet of the air storage chamber.

[0008] In order to facilitate impurities to pass through the screening plate better, further, an inclined guide frame is fixedly connected to the inside of the screening box above the screening plate, and the inclined guide frame is fixedly connected to the bottom of the air cylinder.

[0009] In order to facilitate better mixing of impurities into the water, further, a stirring fan blade group is provided inside the screening box below the screening plate, and the stirring fan blade group is connected to the first eccentric disk through a transmission assembly.

[0010] Furthermore, the transmission assembly includes a mounting plate, a second T-rod and a limit rod, the mounting plate is slidably connected to the inside of the screening case and is located below the first eccentric disk, the agitating fan blade group is rotatably connected to the mounting plate, the limit rod is symmetrically fixedly connected to both sides of the screening case, the mounting plate and the limit rod are slidably connected, the second T-rod is symmetrically fixedly connected to both sides of the mounting plate, the upper end of the second T-rod is slidably connected to the first T-slot on the first eccentric disk on the same side, and a drain pipe is connected to the bottom of the screening case, and an electric valve is installed on the drain pipe.

[0011] In order to facilitate the shaking of the screening box, it further includes a base, a side of the base close to the discharge box door is fixedly connected with a pillar, the upper end of the pillar is rotatably connected to the screening box, and a lifting mechanism is installed on the side of the base away from the pillar.

[0012] Furthermore, the jacking mechanism includes a first hydraulic cylinder, a second piston rod with a piston, a second hydraulic cylinder, and a third piston rod with a piston, the first hydraulic cylinder is rotatably connected to the base, the second piston rod is slidably connected in the first hydraulic cylinder, a tension spring is arranged in the first hydraulic cylinder, the two ends of the tension spring are respectively fixedly connected to the first hydraulic cylinder and the second piston rod, one end of the second piston rod extending upward out of the first hydraulic cylinder is rotatably connected to the bottom of the screening box, the second hydraulic cylinder is fixedly installed on the side of the screening box close to the motor, the third piston rod is slidably connected in the second hydraulic cylinder, the side of the rotating rod close to the motor is connected to the second eccentric disk through a ratchet, the second eccentric disk is provided with a circle of second T-slots, a T-block is slidably connected in the second T-slot, the upper end of the third piston rod is fixedly connected to the T-block, and the first hydraulic cylinder and the second hydraulic cylinder are connected through a hydraulic oil pipe.

[0013] In order to reduce the friction between the first T-rod, the second T-rod and the first eccentric disk, and reduce the friction between the T-block and the second eccentric disk, further, the first T-slot of the first eccentric disk and the second T-slot of the second eccentric disk are both circumferentially equidistantly movably connected with balls, and the balls roll against the first T-rod, the second T-rod and the T-block.

[0014] A method for using a screening machine for processing Chinese medicinal materials mainly comprises the following steps:

[0015] S1: First, the processed Chinese medicinal materials are transported to the screening plate in the screening box through the feeding pipe;

[0016] S2: Then start the motor, the motor will drive the screening plate to move up and down reciprocatingly through the rotating rod, the first eccentric disk and the first T-shaped rod, and then the Chinese medicinal materials will move up and down reciprocatingly under the drive of the screening plate;

[0017] S3: When the screening plate moves up and down, it will also drive the first piston rod to move back and forth in the gas cylinder, so that the gas cylinder can deliver gas to the gas storage chamber, so that when the screening plate throws the Chinese medicinal materials up, the gas storage chamber will just spray gas downward through the spray head;

[0018] S4: Then the heavier Chinese medicinal materials and the lighter impurities will produce a height difference under the resistance of the air. When the Chinese medicinal materials and the impurities fall, the impurities will first contact the screening plate and fall through the screening holes of the screening plate to the bottom of the screening box and be separated from the Chinese medicinal materials.

[0019] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art: the present invention uses a screening box, a screening plate, a rotating rod, a motor, a first eccentric wheel, a first T-rod, an air storage chamber, a nozzle, an air cylinder and a first piston rod and other components in coordination. Compared with the prior art method of only using vibration or shaking to screen and remove impurities from Chinese medicinal materials through a screening plate, when the processed Chinese medicinal materials are placed on the screening plate for screening and impurity removal, the downwardly sprayed gas will cause a height difference between the Chinese medicinal materials and the impurities under the action of gas resistance. Since the impurities will fall before the Chinese medicinal materials, the impurities that fall first will better pass through the screening plate and fall to the bottom of the screening box in the absence of the blocking effect of the Chinese medicinal materials, thereby effectively improving the efficiency of screening out impurities.

[0020] At the same time, when the thrown Chinese medicinal materials fall, the downwardly ejected gas will also produce a downward thrust on the Chinese medicinal materials, so that the Chinese medicinal materials can better collide with the screening plate, further improving the effect of removing some impurities attached to the surface of the Chinese medicinal materials, and effectively ensuring the quality of the Chinese medicinal materials after screening.

[0021] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In the attached picture:

[0023] Figure 1 It is a front view schematic diagram of the present invention;

[0024] Figure 2 It is a front view structural schematic diagram of the present invention;

[0025] Figure 3 For the present invention Figure 2 Schematic diagram of the structure of part A;

[0026] Figure 4 It is a schematic diagram of the structure of the first eccentric disk and the ball in the present invention;

[0027] Figure 5 It is a schematic structural diagram of the second eccentric disc, the ratchet wheel and the rotating rod in the present invention;

[0028] Figure 6 It is a schematic diagram of the structure of the stirring blade group and the mounting plate in the present invention.

[0029] In the figure: 1. screening chassis; 101. feed pipe; 102. discharge box door; 103. air storage chamber; 104. base; 105. pillar; 106. first hydraulic cylinder; 107. tension spring; 108. second piston rod; 109. second hydraulic cylinder; 1010. third piston rod; 1011. T-block; 1012. hydraulic oil pipe; 2. screening plate; 201. motor; 202. rotating rod; 203. first eccentric disk; 204. first T-bar; 205. ball; 206. air cylinder; 207. first piston rod; 208. tilting guide frame; 209. second T-bar; 2010. mounting plate; 2011. stirring fan blade group; 2012. limit rod; 2013. ratchet; 2014. second eccentric disk. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0031] Example 1: Reference Figure 1-Figure 6 A screening machine for preparing Chinese medicinal materials comprises a screening box 1, an upper end of one side of the screening box 1 is connected to a feed pipe 101, a side of the screening box 1 away from the feed pipe 101 is rotatably connected to a discharge box door 102, and further comprises: a screening plate 2, which can be lifted and connected in the screening box 1, and the screening plate 2 is located below the feed pipe 101 and the discharge box door 102; an air storage chamber 103 is opened at the upper end of the interior of the screening box 1, and a plurality of rows of nozzles are equidistantly connected to the lower end of the air storage chamber 103.

[0032] It also includes a motor 201, a rotating rod 202, a first eccentric disk 203 and a first T-bar 204. The motor 201 is fixedly connected to one side of the screening box 1 through a bracket. The rotating rod 202 is rotatably connected inside the screening box 1 and is located below the screening plate 2. The end of the rotating rod 202 close to the bracket extends out of the screening box 1 and is fixedly connected to the output end of the motor 201. The first eccentric disk 203 is symmetrically fixedly connected to both sides of the rotating rod 202. A circle of first T-slots is provided on the first eccentric disk 203. The first T-bar 204 is slidably connected in the first T-slot of the first eccentric disk 203. The upper end of the first T-bar 204 is fixedly connected to the bottom of the screening plate 2.

[0033] It also includes an air cylinder 206 and a first piston rod 207 with a piston. The air cylinder 206 is equidistantly arranged on both sides of the lower end of the air storage chamber 103 and is fixedly connected to the inner wall of the screening box 1. The first piston rod 207 is slidably connected in the air cylinder 206. The lower end of the first piston rod 207 is fixedly connected to the screening plate 2. Check valves are provided in the air inlet and outlet of the air cylinder 206. The air outlet of the air cylinder 206 is connected to the air inlet of the air storage chamber 103.

[0034] When the Chinese medicinal materials are processed and the impurities mixed in them and the harmful substances precipitated from the Chinese medicinal materials need to be screened out, the staff first adds the Chinese medicinal materials into the screening box 1 through the feeding pipe 101, so that the Chinese medicinal materials fall onto the screening plate 2, and then the motor 201 can be started, and the motor 201 will drive the first eccentric disk 203 to rotate through the rotating rod 202, and the first eccentric disk 203 will drive the screening plate 2 to move up and down through the first T-shaped rod 204, and the screening plate 2 will lift the Chinese medicinal materials and move with the screening plate 2 during the falling process. 2, and then some impurities attached to the Chinese medicinal materials will be separated from the Chinese medicinal materials under the action of the impact force. When the screening plate 2 moves downward, the screening plate 2 will drive the first piston rod 207 to move downward, and then the first piston rod 207 will suck the gas into the gas cylinder 206. When the screening plate 2 drives the first piston rod 207 to move upward, the first piston rod 207 will transport the gas sucked in the gas cylinder 206 into the gas storage chamber 103 and spray it downward through the nozzle, so that when the screening plate 2 throws the Chinese medicinal materials upward, the nozzle will simultaneously The air is jetted downwards. Since the mass of the Chinese medicinal materials is greater than that of the impurities, the height to which the Chinese medicinal materials are thrown upwards will be greater than the height to which the impurities are thrown upwards under the action of air resistance, thereby separating the Chinese medicinal materials from the impurities. Since the impurities will fall before the Chinese medicinal materials, the impurities that fall first will better pass through the screening plate 2 and fall to the bottom of the screening box 1 in the absence of the blocking effect of the Chinese medicinal materials, thereby effectively improving the efficiency of screening out the impurities. At the same time, when the thrown Chinese medicinal materials fall, the gas jetted downwards will also The material generates a downward thrust, so that the Chinese medicinal materials can better collide with the screening plate 2, further improving the effect of removing some impurities attached to the surface of the Chinese medicinal materials, and effectively ensuring the quality of the screened Chinese medicinal materials. When the screening of the Chinese medicinal materials is completed, the discharge box door 102 can be opened at this time, and then the screened Chinese medicinal materials can be taken out of the screening box 1, and the next screening operation can be carried out, and the screened Chinese medicinal materials can be sent to the next process for processing, effectively improving the efficiency and quality of impurity screening and separation of Chinese medicinal materials.

[0035] Example 2: Reference Figure 1-Figure 6, a screening machine for preparing Chinese medicinal materials, is basically the same as Example 1. Furthermore, an inclined guide frame 208 is fixedly connected to the top of the screening plate 2 inside the screening machine box 1, and the inclined guide frame 208 is fixedly connected to the bottom of the air cylinder 206.

[0036] By setting the inclined guide frame 208, when the Chinese medicinal materials are lifted up by the screening plate 2, the Chinese medicinal materials located on the outside can move toward the middle under the action of the inclined guide frame 208, so that the falling Chinese medicinal materials can fall to a relatively middle position of the screening plate 2, so that the impurities separated from the Chinese medicinal materials can better pass through the screening holes on the screening plate 2, effectively improving the screening effect of impurities.

[0037] Example 3: Reference Figure 1-Figure 6 A screening machine for preparing Chinese medicinal materials is basically the same as Example 2. Furthermore, a stirring blade group 2011 is arranged inside the screening box 1 below the screening plate 2, and the stirring blade group 2011 is connected to the first eccentric disk 203 through a transmission assembly.

[0038] The transmission assembly includes a mounting plate 2010, a second T-bar 209 and a limit rod 2012. The mounting plate 2010 is slidably connected to the inside of the screening case 1 and is located below the first eccentric disk 203. The stirring blade group 2011 is rotatably connected to the mounting plate 2010. The limit rod 2012 is symmetrically fixedly connected to both sides of the screening case 1. The mounting plate 2010 and the limit rod 2012 are slidably connected. The second T-bar 209 is symmetrically fixedly connected to both sides of the mounting plate 2010. The upper end of the second T-bar 209 is slidably connected to the first T-slot on the first eccentric disk 203 on the same side. A drain pipe is connected to the bottom of the screening case 1, and an electric valve is installed on the drain pipe.

[0039] When the first eccentric disk 203 drives the screening plate 2 to move up and down through the first T-bar 204, it will also drive the mounting plate 2010 to move up and down reciprocatingly under the screening box 1 through the second T-bar 209 and with the cooperation of the limit rod 2012. In the process of screening the Chinese medicinal materials, a certain amount of water can be first injected into the lower end of the inner part of the screening box 1, so that when the mounting plate 2010 drives the stirring blade group 2011 to move up and down in the water, the blades on the stirring blade group 2011 will rotate under the resistance of the water, so that the water can be stirred. When the dust and other impurities in the processed Chinese medicinal materials pass through the screening plate 2 and fall onto the water surface, they can be quickly dissolved in the water, avoiding some lighter impurities from accumulating on the water surface and thus being unable to contact with the water, so that the drier dust and other impurities that are not wetted by water float up again under the action of the airflow and adhere to the Chinese medicinal materials, effectively improving the effect of removing and collecting the dust and other impurities on the Chinese medicinal materials.

[0040] Example 4: Reference Figure 1-Figure 6 , a screening machine for preparing Chinese medicinal materials, is basically the same as Example 3, and further includes a base 104, a side of the base 104 close to the discharge box door 102 is fixedly connected with a support 105, the upper end of the support 105 is rotatably connected to the screening machine box 1, and a lifting mechanism is installed on the side of the base 104 away from the support 105.

[0041] The lifting mechanism includes a first hydraulic cylinder 106, a second piston rod 108 with a piston, a second hydraulic cylinder 109, and a third piston rod 1010 with a piston. The first hydraulic cylinder 106 is rotatably connected to the base 104, and the second piston rod 108 is slidably connected in the first hydraulic cylinder 106. A tension spring 107 is arranged in the first hydraulic cylinder 106, and both ends of the tension spring 107 are fixedly connected to the first hydraulic cylinder 106 and the second piston rod 108 respectively. One end of the second piston rod 108 extending upward from the first hydraulic cylinder 106 is rotatably connected to the bottom of the screening box 1. The second hydraulic cylinder 109 is fixedly installed on the side of the screening box 1 close to the motor 201, the third piston rod 1010 is slidably connected in the second hydraulic cylinder 109, the side of the rotating rod 202 close to the motor 201 is connected to the second eccentric disk 2014 through the ratchet 2013, the second eccentric disk 2014 is provided with a circle of second T-slots, and a T-block 1011 is slidably connected in the second T-slot, the upper end of the third piston rod 1010 is fixedly connected to the T-block 1011, and the first hydraulic cylinder 106 and the second hydraulic cylinder 109 are connected through the hydraulic oil pipe 1012.

[0042] When the rotating rod 202 drives the screening plate 2 to move up and down in the screening box 1 through the first eccentric disk 203, the rotating rod 202 can also drive the second eccentric disk 2014 to rotate, and the second eccentric disk 2014 will drive the third piston rod 1010 to move up and down in the second hydraulic cylinder 109 through the T-block 1011. When the third piston rod 1010 moves downward, the hydraulic oil stored in the second hydraulic cylinder 109 will be transported into the first hydraulic cylinder 106 through the hydraulic oil pipe 1012, and then the second piston rod 108 will overcome the jacking of the hydraulic oil. The tension of the tension spring 107 and the gravity of the screening box 1 move upward, so that the screening box 1 can be pushed to a tilted state, so that the screening box 1 can be pushed to a state of tilting toward the side of the support 105. When the second piston rod 108 moves upward, the excess hydraulic oil in the first hydraulic cylinder 106 will flow back into the second hydraulic cylinder 109, and then the screening box 1 will rotate back and forth and tilt downward toward the side away from the support 105. By repeating this process, the screening box 1 can be swung back and forth left and right, thereby further improving the screening effect on Chinese medicinal materials.

[0043] Furthermore, when the screening of the Chinese medicinal materials is completed and they need to be discharged, since the second eccentric disk 2014 is connected to the rotating rod 202 by the ratchet 2013, the second eccentric disk 2014 and the first eccentric disk 203 can be controlled to rotate together. After the screening box 1 is tilted to one side of the support 105, the rotating rod 202 can be controlled to rotate in the opposite direction, and then the second eccentric disk 2014 will not rotate under the action of the ratchet 2013, and then the screening box 1 will always be in a tilted state, and then the discharge box door 102 can be opened, and the first eccentric disk 203 can be controlled to rotate continuously, and the first eccentric disk 203 will drive the screening plate 2 to shake, and then the Chinese medicinal materials on the screening plate 2 will flow along the tilted screening plate 2 to the side of the discharge box door 102, so that the Chinese medicinal materials can be discharged from the screening box 1.

[0044] Example 5: Reference Figure 1-Figure 6 , a screening machine for preparing Chinese medicinal materials, is basically the same as Example 4, and further, balls 205 are movably connected in a circularly equidistant manner in the first T-slot of the first eccentric disk 203 and the second T-slot of the second eccentric disk 2014, and the balls 205 roll against the first T-bar 204, the second T-bar 209 and the T-block 1011.

[0045] By setting the ball 205, when the first T-bar 204 and the second T-bar 209 slide in the first T-slot and the T-block 1011 slides in the second T-slot, the friction between the first T-bar 204, the second T-bar 209 and the first eccentric disk 203 can be reduced, and the friction between the T-block 1011 and the second eccentric disk 2014 can be reduced, thereby effectively ensuring the smoothness of the first T-bar 204, the second T-bar 209 and the T-block 1011 when driving the screening plate 2, the mounting plate 2010 and the third piston rod 1010 to move.

[0046] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as above with a preferred embodiment, it is not used to limit the present invention.

Claims

1. A screening machine for processing Chinese medicinal materials, characterized in that: The invention comprises a screening machine box (1), wherein an upper end of one side of the screening machine box (1) is connected to a feed pipe (101), and a side of the screening machine box (1) away from the feed pipe (101) is rotatably connected to a discharge box door (102), and further comprises: A screening plate (2) is connected in a liftable manner in the screening box (1), and the screening plate (2) is located below the feed pipe (101) and the discharge box door (102); An air storage chamber (103) is provided at the upper end of the interior of the screening box (1), and a plurality of rows of air jets are equidistantly connected to the lower end of the air storage chamber (103); It also includes a motor (201), a rotating rod (202), a first eccentric disk (203) and a first T-shaped rod (204), wherein the motor (201) is fixedly connected to one side of the screening box (1) via a bracket, the rotating rod (202) is rotatably connected inside the screening box (1) and is located below the screening plate (2), one end of the rotating rod (202) close to the bracket extends out of the screening box (1) and is fixedly connected to the output end of the motor (201), the first eccentric disk (203) is symmetrically fixedly connected to both sides of the rotating rod (202), a circle of first T-shaped grooves is provided on the first eccentric disk (203), the first T-shaped rod (204) is slidably connected in the first T-shaped groove of the first eccentric disk (203), and the upper end of the first T-shaped rod (204) is fixedly connected to the bottom of the screening plate (2); A stirring blade group (2011) is arranged inside the screening box (1) and below the screening plate (2); the stirring blade group (2011) is connected to the first eccentric disk (203) via a transmission assembly; the transmission assembly comprises a mounting plate (2010), a second T-shaped rod (209) and a limit rod (2012); the mounting plate (2010) is slidably connected inside the screening box (1) and below the first eccentric disk (203); the stirring blade group (2011) is rotatably connected to the mounting plate (2010) and the second T-shaped rod (209) and the limit rod (2012). The screening box (1) is mounted on a plate (2010), the limiting rods (2012) are symmetrically fixedly connected to the two sides of the screening box (1), the mounting plate (2010) and the limiting rods (2012) are slidably connected, the second T-shaped rods (209) are symmetrically fixedly connected to the two sides of the mounting plate (2010), the upper ends of the second T-shaped rods (209) are slidably connected to the first T-shaped grooves on the first eccentric disk (203) on the same side, and the bottom of the screening box (1) is connected to a drain pipe, and an electric valve is installed on the drain pipe. The invention also comprises a base (104), a support (105) being fixedly connected to one side of the base (104) close to the discharge box door (102), the upper end of the support (105) being rotatably connected to the screening box (1), a lifting mechanism being installed on the side of the base (104) away from the support (105), the lifting mechanism comprising a first hydraulic cylinder (106), a second piston rod (108) with a piston, a second hydraulic cylinder (109), and a third piston rod (1010) with a piston, the first hydraulic cylinder (106) being rotatably connected to the base (104), the second piston rod (108) being slidably connected to the first hydraulic cylinder (106), a tension spring (107) being arranged in the first hydraulic cylinder (106), the two ends of the tension spring (107) being respectively connected to the first hydraulic cylinder (106) and the second piston rod (108). The second piston rod (108) is fixedly connected, one end of the second piston rod (108) extending upward from the first hydraulic cylinder (106) is rotatably connected to the bottom of the screening box (1), the second hydraulic cylinder (109) is fixedly installed on a side of the screening box (1) close to the motor (201), the third piston rod (1010) is slidably connected in the second hydraulic cylinder (109), the side of the rotating rod (202) close to the motor (201) is connected to a second eccentric disk (2014) through a ratchet (2013), a circle of second T-slots is provided on the second eccentric disk (2014), a T-block (1011) is slidably connected in the second T-slot, the upper end of the third piston rod (1010) is fixedly connected to the T-block (1011), and the first hydraulic cylinder (106) and the second hydraulic cylinder (109) are connected through a hydraulic oil pipe (1012).

2. A screening machine for processing Chinese medicinal materials according to claim 1, characterized in that: It also includes an air cylinder (206) and a first piston rod (207) with a piston. The air cylinder (206) is equidistantly arranged on both sides of the lower end of the air storage chamber (103) and is fixedly connected to the inner wall of the screening box (1). The first piston rod (207) is slidably connected in the air cylinder (206). The lower end of the first piston rod (207) is fixedly connected to the screening plate (2). Check valves are arranged in the air inlet and outlet of the air cylinder (206). The air outlet of the air cylinder (206) is connected to the air inlet of the air storage chamber (103).

3. A screening machine for processing Chinese medicinal materials according to claim 2, characterized in that: An inclined guide frame (208) is fixedly connected inside the screening box (1) and located above the screening plate (2); the inclined guide frame (208) is fixedly connected to the bottom of the air cylinder (206).

4. A screening machine for processing Chinese medicinal materials according to claim 1, characterized in that: Balls (205) are movably connected in a circumferentially equidistant manner in the first T-slot of the first eccentric disk (203) and in the second T-slot of the second eccentric disk (2014), and the balls (205) roll against the first T-bar (204), the second T-bar (209) and the T-block (1011).

5. A method for using a screening machine for processing Chinese medicinal materials, used for the screening machine for processing Chinese medicinal materials according to claim 2, characterized in that: The main steps include: S1: First, the prepared Chinese medicinal materials are transported to the screening plate (2) in the screening box (1) through a feeding pipe; S2: Then the motor (201) is started, and the motor (201) drives the screening plate (2) to move up and down reciprocatingly through the rotating rod (202), the first eccentric disc (203) and the first T-shaped rod (204), and then the Chinese medicinal materials move up and down reciprocatingly under the drive of the screening plate (2); S3: When the screening plate (2) moves up and down, it also drives the first piston rod (207) to move back and forth in the gas cylinder (206), so that the gas cylinder (206) delivers gas to the gas storage chamber (103), so that when the screening plate (2) throws the Chinese medicinal materials up, the gas storage chamber (103) just sprays gas downward through the spray head; S4: Then, the heavier Chinese medicinal materials and the lighter impurities will generate a height difference due to the resistance of the air. When the Chinese medicinal materials and the impurities fall, the impurities will first contact the screening plate (2) and fall through the screening holes of the screening plate (2) to the bottom of the screening box (1) and be separated from the Chinese medicinal materials.

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