Automatic particle screening and weighing device and screening method

Abstract

The invention relates to the technical field of PVC floor forming machining, in particular to an automatic particle screening and weighing device and a screening method.The automatic particle screening and weighing device comprises a bottom frame and a motor and further comprises a shell, a screening plate, a blocking plate, a blocking connecting rod, a switching rod, a longitudinal screening part, a transverse screening part, a blocking part, a lifting part and a weighing part; by arranging the longitudinal screening component and the transverse screening component, the cam is matched with the longitudinal screening component and the transverse screening component when rotating forwards, the screening plate is driven to conduct transverse screening and longitudinal screening on materials at the upper end of the screening plate, by arranging the blocking component, when the cam rotates backwards, the blocking block can block meshes of the screening plate, and the materials clamped in the meshes are cleaned to the position above the screening plate; when the cam rotates reversely, the screening plate can be gradually inclined, materials can be conveniently taken out and weighed, the material taking-out speed is increased, and the measurement accuracy of the crushing degree of material particles is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of PVC floor forming and processing, and particularly to an automatic particle screening and weighing device and a screening method. Background Art

[0002] In the production process of homogeneous through-core PVC floors, the raw materials are first melted to improve their fluidity, making it easier to mix fully with other additives (such as fillers, plasticizers, stabilizers, etc.). Then, they are cooled and roll-pressed and broken into particles. Finally, the broken particles are formed by hot roll-pressing. Breaking them before the hot roll can help improve the fluidity of the material, eliminate large lumps, make it easier to pass through the hot roll-pressing for forming, and at the same time, ensure that the material is more uniform, thereby improving the consistency and quality of the product during the production process. Also, when producing multi-color PVC floors, different colored PVC material particles only need to be laid before the hot roll to produce different PVC floors. Therefore, the process of breaking the melted and cooled formed PVC material is particularly important.

[0003] In the prior art, in order to detect the degree of particle breakage and adjust the crusher to ensure the crushing effect of the particles, a certain mass of particles is randomly selected from the broken particles, and then the particles are screened by a screening machine. The particles are screened into different particle groups according to the particle size, and then the particles on each layer are taken out in turn, placed on a weighing device and weighed successively in a stacked manner, and the weight of the particles on each layer and the total mass of all the particles finally are used to calculate the proportion of the mass of the particles on different layers in the total particles, so as to judge the crushing effect of the PVC material, and the crushing effect of the crusher is reasonably adjusted according to the crushing effect.

[0004] For example, a screening device with the patent number CN104148275B is provided. By arranging multiple layers of horizontally arranged screens with different mesh sizes in a screening bucket and cooperating with a swing driving device, the material rolls on each layer of the screen, so that the material is dispersed on each layer of the screen, which is beneficial to the thorough screening of the material. After screening, the screening bucket is tilted by the swing driving device, and then the discharge doors located on the side wall are opened in turn, and the materials with different particle sizes can be conveniently collected. Although the prior art provides a device that can screen different particle sizes and can dump and take out the particles, when screening the material particles, there will be a phenomenon that the particles just match the size of the screen mesh of the screening plate, causing the mesh to be stuck by the particles. When taking out the material particles, it is easy for the operator to miss or waste the taking-out time, which further affects the weighing detection efficiency and detection accuracy of the material particles and affects the judgment of the crushing degree of the material particles.

[0005] Therefore, an automatic particle screening and weighing device and a screening method are proposed. Summary of the Invention

[0006] The purpose of the present invention is to provide a particle automatic screening and weighing device and a screening method to solve the problem that in the prior art, the mesh of the screening plate is prone to jamming material particles, affecting the extraction efficiency and measurement accuracy.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] The particle automatic screening and weighing device includes a chassis and a motor, the motor is fixed on the chassis, and further includes a housing, a screening plate, a plugging plate, a plugging connecting rod, a switching rod, a longitudinal screening component, a transverse screening component, a plugging component, a lifting component and a weighing component. The housing is slidably connected to the chassis, the screening plate is arranged in the housing, the screening plate is provided with meshes, the plugging plate is slidably connected in the screening plate, the plugging connecting rod is connected to the left side of the plugging plate, the switching rod is slidably connected in the plugging connecting rod, the longitudinal screening component is arranged on the housing, which makes the whole housing move up and down when the motor rotates forward, the transverse screening component is arranged outside the screening plate, which makes the screening plate and the plugging plate keep horizontally fixed when the motor rotates forward, and drives the screening plate to move left and right under the cooperation of the switching rod. The plugging component is arranged on the plugging plate, which releases the horizontal fixation between the plugging plate and the screening plate when the motor rotates reversely, and cooperates with the plugging plate to block the meshes of the screening plate. The lifting component is arranged at the bottom of the housing, which cooperates with the longitudinal screening component to lift the left end of the screening plate after the horizontal fixation between the plugging plate and the screening plate is released, so that the material on the screening plate rolls to the right. The weighing component is arranged at the right end of the housing, which automatically weighs the collected material after it is opened.

[0009] Preferably, the longitudinal screening component includes a cam, a longitudinal screening plate, a longitudinal screening groove, a longitudinal screening column and a longitudinal screening spring. The cam is fixed on the motor, the longitudinal screening plate is fixed on the left side of the housing, the longitudinal screening groove is opened at the bottom of the housing, the longitudinal screening column is fixed on the upper end of the chassis, the longitudinal screening column is slidably connected with the longitudinal screening groove, both ends of the longitudinal screening spring are respectively connected with the bottom of the housing and the upper end of the chassis, and the cam cooperates with the longitudinal screening plate.

[0010] Preferably, the transverse screening component includes a transverse screening block, a transverse screening chamfer, a synchronization unit, a hinge column, a hinge rod, a transverse screening baffle, a transverse screening spring, a clamping turntable and a turntable baffle. The transverse screening block is fixed on the left end of the switching rod, the transverse screening chamfer is opened at the upper end of the transverse screening block, the transverse screening chamfer cooperates with the cam, the synchronization unit is arranged at the side of the switching rod, the hinge column is fixed at the rear end of the plugging connecting rod, the hinge rod is fixed on the left side of the plugging plate, the plugging connecting rod is rotatably connected with the plugging connecting rod through the hinge rod and the hinge column. The transverse screening baffle is fixed on the screening plate, the clamping turntable is rotatably connected in the housing, the screening plate is slidably connected with the clamping turntable, the turntable baffle is fixed on the clamping turntable, and both ends of the transverse screening spring are respectively fixed with the transverse screening baffle and the turntable baffle.

[0011] Preferably, the synchronization unit includes a fixing groove, a fixing spring, a fixing block, a fixing chamfer and a fixing ring. The fixing groove is formed in the plugging connecting rod, the switching rod is slidably connected to the fixing groove, the two ends of the fixing spring are respectively connected to the upper end of the switching rod and the inner wall of the plugging connecting rod, the fixing block is arranged on the left side of the switching rod, the fixing chamfer is formed on the fixing block, the fixing ring is fixedly connected to the lower left end of the screening plate, and the fixing ring cooperates with the fixing block.

[0012] Preferably, the plugging component includes a sieve plate groove, a sieve plate spring, a plugging groove, a plugging spring, a plugging block and a material passing groove. The sieve plate groove is formed in the screening plate, the plugging plate is slidably connected to the sieve plate groove, the two ends of the sieve plate spring are respectively connected to the front end of the plugging plate and the inner wall of the screening plate, the plugging groove is formed in the plugging plate, the plugging block is slidably connected to the plugging groove, the two ends of the plugging spring are respectively connected to the lower end of the plugging block and the bottom of the plugging plate, the upper end of the plugging block cooperates with the mesh, the material passing groove is formed in the plugging plate, and the material passing groove cooperates with the mesh.

[0013] Preferably, the lifting component includes a yielding groove, a yielding spring, a yielding rack, a yielding chamfer, a gear, a lifting rack, a lifting spring and a stabilizing unit. The yielding groove is formed in the vertical screening column, the yielding rack is slidably connected to the yielding groove, the two ends of the yielding spring are respectively connected to the left end of the yielding rack and the inner wall of the vertical screening column, the yielding chamfer is formed in the yielding groove, the gear is rotatably connected to the bottom of the housing, the yielding chamfer cooperates with the gear, the lifting rack is longitudinally slidably connected in the housing, the lifting rack cooperates with the right end of the gear, the two ends of the lifting spring are respectively connected to the lower end of the lifting rack and the inner wall of the housing, the upper end of the lifting rack cooperates with the lower end of the lowermost screening plate, and the stabilizing unit is arranged in the housing.

[0014] Preferably, the stabilizing unit includes a stabilizing groove, a transverse pushing groove, a transverse pushing spring, a transverse pushing block, a stabilizing ring, a reset spring and a reset retaining ring. The stabilizing groove is formed in the housing, the hinged column is slidably connected to the stabilizing groove. The stabilizing groove includes a transverse movement section, an arc section and a locking section. The transverse pushing groove is formed at the lower end of the stabilizing groove, the transverse pushing block is slidably connected to the stabilizing groove, the two ends of the transverse pushing spring are respectively connected to the left end of the transverse pushing block and the inner wall of the housing, the upper end of the transverse pushing block extends into the transverse movement section of the transverse pushing groove, an unlocking chamfer is arranged at the upper end of the transverse pushing block, and the unlocking chamfer cooperates with the hinged column. The stabilizing ring is fixedly connected to the rear end of the gear, a stabilizing chamfer is arranged at the rear end of the stabilizing ring, and the stabilizing chamfer cooperates with the right end of the transverse pushing block. The reset retaining ring is arranged at the front end of the gear, the reset retaining ring rotates synchronously with the gear, the two ends of the reset spring are respectively connected to the front end of the gear and the rear end of the reset retaining ring, and the front end of the reset retaining ring is in contact with the housing.

[0015] Preferably, the weighing component includes a fitting groove, a fitting plate, a fitting spring, and an object-taking groove. An outlet is provided at the right end of the housing. The fitting groove is formed in the housing. The fitting plate is slidably connected in the fitting groove. The two ends of the fitting spring are respectively connected to the upper end of the fitting plate and the inner wall of the housing. The object-taking groove is formed in the fitting plate. The upper end of the screening plate is in contact with the upper end of the object-taking groove.

[0016] Preferably, an unlocking plate is provided at the rear end of the housing, and the unlocking plate is connected to a hinge column.

[0017] A screening method includes the above-mentioned particle automatic screening and weighing device. By controlling the motor to drive the cam to rotate forward, the cam cooperates with the horizontal screening block to drive the screening plate to vibrate left and right in the housing for screening;

[0018] By controlling the motor to drive the cam to rotate, the cam cooperates with the vertical screening plate to drive the housing to vibrate up and down on the chassis for screening;

[0019] By controlling the motor to drive the cam to rotate in the reverse direction, the cam cooperates with the horizontal screening block and the blocking component to block the mesh holes of the screening plate;

[0020] By providing a lifting component, after the mesh holes are blocked, the lifting component cooperates with the up-and-down vibration of the housing to lift one side of the screening plate.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] By providing a cam on the chassis, when the cam rotates forward, it cooperates with the vertical screening component and the horizontal screening component to drive the screening plate to perform horizontal screening and vertical screening on the material above it. By providing a blocking component, when the cam rotates in the reverse direction, the blocking block can block the mesh holes of the screening plate and clean the material stuck in the mesh holes to above the screening plate. By providing a lifting component, when the cam rotates in the reverse direction, the screening plate can be gradually inclined, facilitating the taking out and weighing of the material, accelerating the material taking-out speed, and ensuring the accuracy of the measurement of the crushing degree of the material particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the overall three-dimensional structure schematic diagram of the present invention;

[0024] Figure 2 is the overall cross-sectional structure schematic diagram of the present invention;

[0025] Figure 3 is the cross-sectional structure schematic diagram at the horizontal screening component of the present invention;

[0026] Figure 4 is of the present invention Figure 3 magnified structure schematic diagram at C in;

[0027] Figure 5Schematic cross-sectional structure diagram of the stabilizing unit of the present invention;

[0028] Figure 6 Schematic cross-sectional structure diagram of the plugging component of the present invention;

[0029] Figure 7 Schematic cross-sectional structure diagram of the lifting component of the present invention;

[0030] Figure 8 Schematic overall cross-sectional structure diagram of the screening plate in the lifted state of the present invention;

[0031] Figure 9 Schematic structure diagram of the unlocking plate of the present invention;

[0032] Figure 10 For the present invention Figure 9 Enlarged structure diagram at position D in

[0033] In the figure: A, chassis; B, motor; 1, housing; 2, screening plate; 21, mesh; 3, plugging plate; 4, plugging component; 5, weighing component; 6, plugging connecting rod; 7, longitudinal screening component; 8, switching rod; 9, transverse screening component; 10, lifting component; 71, cam; 72, longitudinal screening plate; 73, longitudinal screening groove; 74, longitudinal screening column; 75, longitudinal screening spring; 91, transverse screening baffle; 92, transverse screening spring; 93, turntable baffle; 94, clamping turntable; 95, transverse screening chamfer; 96, transverse screening block; 97, hinge column; 98, hinge rod; 991, fixing groove; 992, fixing spring; 993, fixing block; 994, fixing chamfer; 995, fixing ring; 41, screening plate groove; 42, screening plate spring; 43, material passing groove; 44, plugging spring; 45, plugging groove; 46, plugging block; 101, retracting groove; 102, retracting spring; 103, retracting rack; 104, retracting chamfer; 105, gear; 106, lifting rack; 107, lifting spring; 1081, stabilizing groove; 10811, transverse movement section; 10812, arc section; 10813, locking section; 1082, transverse pushing groove; 1083, transverse pushing spring; 1084, transverse pushing block; 1085, stabilizing ring; 1085, stabilizing chamfer; 1086, reset spring; 1087, reset retaining ring; 11, discharge port; 51, fitting groove; 52, fitting spring; 53, fitting plate; 54, object taking groove; 12, unlocking plate. Detailed implementation manners

[0034] In the drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if terms such as "upper", "lower", "left", "right", "front", "rear", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and cannot be construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0035] Embodiment 1

[0036] Please refer to Figures 1 to 5 , the present invention provides a particle automatic screening and weighing device, including a chassis A and a motor B. The motor B is fixed on the chassis A. It also includes a housing 1, a screening plate 2, a sealing plate 3, a sealing link 6, a switching rod 8, a longitudinal screening component 7, a transverse screening component 9, a sealing component 4, a lifting component 10, and a weighing component 5. The housing 1 is slidably connected to the chassis A. The screening plate 2 is arranged inside the housing 1. The screening plate 2 is provided with meshes 21. The sealing plate 3 is slidably connected inside the screening plate 2. The sealing link 6 is connected to the left side of the sealing plate 3. The switching rod 8 is slidably connected inside the sealing link 6. The longitudinal screening component 7 is arranged on the housing 1, which makes the whole housing 1 move up and down when the motor B rotates forward. The transverse screening component 9 is arranged outside the screening plate 2, which makes the screening plate 2 and the sealing plate 3 keep horizontally fixed when the motor B rotates forward, and drives the screening plate 2 to move left and right under the cooperation of the switching rod 8. The sealing component 4 is arranged on the sealing plate 3, which releases the horizontal fixation between the sealing plate 3 and the screening plate 2 when the motor B rotates reversely, and cooperates with the sealing plate 3 to block the meshes 21 of the screening plate 2. The lifting component 10 is arranged at the bottom of the housing 1, which cooperates with the longitudinal screening component 7 to lift the left end of the screening plate 2 after the horizontal fixation between the sealing plate 3 and the screening plate 2 is released, so that the materials on the screening plate 2 roll to the right. The weighing component 5 is arranged at the right end of the housing 1, which collects the materials and conducts automatic weighing after being opened.

[0037] Specifically, a plurality of screening plates 2 are arranged from top to bottom, and a sealing plate 3 is correspondingly arranged in each screening plate 2. Among them, the lowest screening plate 2 and the sealing plate 3 are provided with meshes 21, a sealing groove 45, a sealing spring 44, a sealing block 46, and a material passing groove 43. A plurality of horizontal stoppers are arranged at the corresponding positions of the screening plates 2 in the housing 1. When the screening plate 2 is in a horizontal position, the lower ends of the horizontal stoppers are in contact with the lower end of the screening plate 2. A corresponding number of transverse screening components 9 are arranged on the side of each screening plate 2 and the sealing plate 3.

[0038] Specifically, the longitudinal screening component 7 includes a cam 71, a longitudinal screening plate 72, a longitudinal screening groove 73, a longitudinal screening column 74, and a longitudinal screening spring 75. The elastic force of the longitudinal screening spring 75 is relatively large. While satisfying the reset elasticity of the housing 1, it enables the housing 1 to move downward only after receiving a sufficient downward force. The cam 71 is fixed on the motor B, the longitudinal screening plate 72 is fixed on the left side of the housing 1, the longitudinal screening groove 73 is opened at the bottom of the housing 1, the longitudinal screening column 74 is fixed at the upper end of the chassis A, and the longitudinal screening column 74 is slidably connected to the longitudinal screening groove 73. Both ends of the longitudinal screening spring 75 are respectively connected to the bottom of the housing 1 and the upper end of the chassis A. The cam 71 cooperates with the longitudinal screening plate 72. Here, the cooperation means that the shortest side of the cam 71 from the rotation center never contacts the longitudinal screening plate 72. When the motor B drives the cam 71 to rotate, the longest side of the rotation center of the cam 71 will gradually fit with the longitudinal screening plate 72 and push the longitudinal screening plate 72 downward, causing the longitudinal screening plate 72 to drive the housing 1 to move downward along the longitudinal screening column 74 and compress the longitudinal screening spring 75. As the cam 71 continues to rotate, the longest side of the cam 71 from its rotation center moves to the uppermost side of the longitudinal screening plate 72 and disengages from the longitudinal screening plate 72. At this time, the housing 1 is reset under the action of the longitudinal screening spring 75, enabling the motor B to drive the housing 1 and the longitudinal screening plate 72 inside it to move up and down repeatedly during multiple rapid rotations of the cam 71, achieving the effect of longitudinal vibration screening.

[0039] Specifically, the transverse screening component 9 includes a transverse screening block 96, a transverse screening chamfer 95, a synchronization unit, a hinge column 97, a hinge rod 98, a transverse screening baffle 91, a transverse screening spring 92, a clamping turntable 94, and a turntable baffle 93. The elastic force of the transverse screening spring 92 can support the weights of the screening plate 2 and the blocking plate 3. The transverse screening block 96 is fixed at the left end of the switching rod 8, the transverse screening chamfer 95 is opened at the upper end of the transverse screening block 96, and the transverse screening chamfer 95 cooperates with the cam 71. Here, the cooperation means that when the motor B drives the cam 71 to rotate forward, the longest side of the cam 71 from its rotation center will gradually fit with the transverse screening chamfer 95 on the upper left side of the transverse screening block 96 and push the transverse screening block 96 to the left along the transverse screening chamfer 95, causing the transverse screening block 96 to drive the blocking connecting plate, the blocking plate 3, and the screening plate 2 to move synchronously to the right under the action of the synchronization unit, making the transverse screening baffle 91 on the screening plate 2 approach the turntable baffle 93 relatively and compress the turntable spring. After the longest side of the cam 71 from its rotation center disengages from the transverse screening block 96, the screening plate 2 is reset under the action of the transverse screening spring 92, thereby achieving the effect of repeated transverse vibration screening. The synchronization unit is arranged on the side of the switching rod 8. The hinge column 97 is fixed at the rear end of the blocking connecting rod 6, the hinge rod 98 is fixed on the left side of the blocking plate 3, and the blocking connecting rod 6 is rotatably connected to the blocking connecting rod 6 through the hinge rod 98 and the hinge column 97. The transverse screening baffle 91 is fixed on the screening plate 2, the clamping turntable 94 is rotatably connected inside the housing 1, the screening plate 2 is slidably connected to the clamping turntable 94, the turntable baffle 93 is fixed on the clamping turntable 94, and both ends of the transverse screening spring 92 are respectively fixed to the transverse screening baffle 91 and the turntable baffle 93.

[0040] Specifically, the rotation center of the clamping turntable 94 is collinear with the symmetry center of the screening plate 2 and the plugging plate 3. The plugging connecting rod 6 on the left, the longitudinal clamping turntable 94 on the right, and the middle plugging plate 3 and screening plate 2 form a parallelogram, so that when one end of the screening plate 2 close to the plugging connecting rod 6 is lifted, the plugging plate 3 can move synchronously with the screening plate 2.

[0041] Specifically, the synchronization unit includes a fixing groove 991, a fixing spring 992, a fixing block 993, a fixing chamfer 994 and a fixing ring 995. The fixing groove 991 is opened in the plugging connecting rod 6, the switching rod 8 is slidably connected with the fixing groove 991, both ends of the fixing spring 992 are connected with the upper end of the switching rod 8 and the inner wall of the plugging connecting rod 6 respectively, the fixing block 993 is arranged on the left side of the switching rod 8, the fixing chamfer 994 is opened on the fixing block 993, the fixing ring 995 is fixedly connected to the lower end of the left side of the screening plate 2, and the fixing ring 995 cooperates with the fixing block 993. The cooperation here means that when in the horizontal screening state, the fixing block 993 is on the left side of the fixing ring 995. When the horizontal screening block 96 drives the switching rod 8, the plugging connecting rod 6 and the plugging plate 3 to move to the right, the fixing block 993 on the switching rod 8 can push the fixing ring 995 to move synchronously to the right, so that the screening plate 2 can move synchronously with the plugging plate 3 during horizontal screening.

[0042] Working principle: When it is necessary to detect the crushing degree of PVC materials to facilitate adjusting the crushing effect of the crusher on PVC materials and ensure the production quality of subsequent PVC bottom plates, the operator first randomly takes appropriate materials from the crushed materials and then places them on the uppermost screening plate 2 in the housing 1. Then, the operator turns on the motor B to drive the cam 71 to rotate forward. When the cam 71 rotates forward, it first cooperates with the horizontal screening chamfer 95, so that the horizontal screening block 96 drives the switching rod 8, the plugging connecting rod 6, the plugging plate 3, the fixing block 993, the fixing ring 995 and the screening plate 2 to move synchronously horizontally, making the horizontal screening baffle 91 on the screening plate 2 approach the turntable baffle 93 and squeeze the turntable spring. After the cam 71 disengages from the horizontal screening block 96, the screening plate 2 resets under the action of the horizontal screening spring 92. With the multiple rotations of the cam 71, the effect of repeatedly horizontally vibrating and screening the crushed materials is achieved.

[0043] Meanwhile, during the forward rotation of the cam 71, after the cam 71 disengages from the transverse sieve block 96, the longest side of the rotation center of the cam 71 will gradually fit with the longitudinal sieve plate 72 and push the longitudinal sieve plate 72 downward, causing the longitudinal sieve plate 72 to drive the housing 1 to move downward along the longitudinal sieve column 74 to compress the longitudinal sieve spring 75. As the cam 71 continues to rotate, the longest side of the cam 71 away from its rotation center moves to the upper side of the longitudinal sieve plate 72 to disengage from the contact with the longitudinal sieve plate 72. At this time, the housing 1 is reset under the action of the longitudinal sieve spring 75, enabling the motor B to drive the housing 1 and the longitudinal sieve plate 72 inside it to move up and down repeatedly during multiple rapid rotations of the cam 71, achieving the effect of longitudinal vibration screening, realizing the combination of the horizontal screening and the longitudinal screening of the screening plate 2 for the material, making the material screening more sufficient, so as to ensure that the data is more accurate when measuring the crushing effect of the material.

[0044] Embodiment 2

[0045] Please refer to Figures 5 to 6 , a particle automatic screening and weighing device is provided, including a plugging component 4. The plugging component 4 includes a sieve plate groove 41, a sieve plate spring 42, a plugging groove 45, a plugging spring 44, a plugging block 46, and a material passing groove 43. The sieve plate groove 41 is opened in the screening plate 2, and the plugging plate 3 is slidably connected in the sieve plate groove 41. The two ends of the sieve plate spring 42 are respectively connected to the front end of the plugging plate 3 and the inner wall of the screening plate 2. The plugging groove 45 is opened on the plugging plate 3, and the plugging block 46 is slidably connected in the plugging groove 45. The two ends of the plugging spring 44 are respectively connected to the lower end of the plugging block 46 and the bottom of the plugging plate 3. The upper end of the plugging block 46 cooperates with the mesh 21. Here, the cooperation means that when the plugging plate 3 slides to the right relative to the screening plate 2, the plugging plate 3 can drive the plugging block 46 to slide along the inner wall of the screening plate 2 until the plugging block 46 moves to directly below the mesh 21, and the plugging block 46 plugs the mesh 21 under the action of the plugging spring 44. The material passing groove 43 is opened on the plugging plate 3, and the width of the material passing groove 43 is greater than the diameter of the mesh 21. The material passing groove 43 cooperates with the mesh 21. Here, the cooperation means that when the fixed block 993 is in contact with the left side of the fixed ring 995, the material passing groove 43 is located directly below the mesh 21, and when the plugging block 46 plugs the mesh 21, the upper end of the material passing groove 43 is completely plugged by the inner wall of the screening plate 2.

[0046] The remaining structures are the same as those in Embodiment 1.

[0047] Working principle: When it is necessary to weigh the material after the screening is completed, in order to prevent a small number of material particles from blocking the mesh 21 of the screening plate 2, which may affect the test results, and also to prevent it from affecting the next screening use of the screening plate 2, the operator only needs to control the motor B to reverse, so that the cam 71 reverses. During the reverse process of the cam 71, the cam 71 repeatedly contacts the longitudinal screening plate 72, so that the housing 1 always maintains the effect of longitudinal vibration. When the cam 71 moves to the transverse screening block 96, the cam 71 fits with the bottom of the transverse screening block 96 and lifts the transverse screening block 96, so that the switching rod 8 presses the fixing spring 992. When the switching rod 8 is lifted, it drives the fixing block 993 to move upward, so that the fixing block 993 moves to the upper end of the fixing ring 995. After the fixing block 993 moves to the upper end of the fixing ring 995, the blocking plate 3 moves relatively to the screening plate 2 to the right under the action of the screening plate spring 42 until the right end of the blocking plate 3 fits with the blocking block at the lower right end of the screening plate 2. At this time, the blocking block 46 is aligned with the mesh 21, and the blocking block 46 moves upward under the action of the blocking spring 44 to fit and block the mesh 21, so that the material particles blocked in the mesh 21 are pushed to the upper end of the screening plate 2, which is convenient for subsequent weighing. Moreover, since the mesh 21 is blocked after screening, it is also convenient for the operator to take out the screened material, preventing the material particles from getting stuck at the mesh 21 when taken out, which may affect the efficiency of taking out and weighing.

[0048] Embodiment 3

[0049] Please refer to Figures 6 to 10, based on the above two embodiments, this embodiment further includes a lifting member 10. The lifting member 10 includes a retraction groove 101, a retraction spring 102, a retraction rack 103, a retraction chamfer 104, a gear 105, a lifting rack 106, a lifting spring 107 and a stabilizing unit. The retraction groove 101 is formed in the longitudinal sieve column 74. The retraction rack 103 is slidably connected in the retraction groove 101. Both ends of the retraction spring 102 are respectively connected to the left end of the retraction rack 103 and the inner wall of the longitudinal sieve column 74. The retraction chamfer 104 is formed on the retraction groove 101. The gear 105 is rotatably connected to the bottom of the housing 1. The retraction chamfer 104 cooperates with the gear 105. The lifting spring 107 has a certain elasticity. When the gear 105 moves downward to cooperate with the retraction chamfer 104, the lifting rack 106 will not move and the gear 105 will not rotate. Here, the cooperation means that after the gear 105 moves to the same plane as the retraction rack 103, when the housing 1 moves downward relative to the retraction rack 103 under the action of the cam 71, the gear 105 gradually fits with the retraction chamfer 104 on the retraction rack 103 and pushes the retraction rack 103 to the left along the retraction chamfer 104, causing the retraction rack 103 to compress the retraction spring 102. When the housing 1 moves upward and resets under the action of the longitudinal sieve spring 75, the housing 1 drives the gear 105 to move upward, so that the lower end of the retraction rack 103 meshes with the gear 105, enabling the gear 105 to rotate, and thus driving the lifting rack 106 at the right end of the gear 105 to move upward. The lifting rack 106 is longitudinally slidably connected in the housing 1. The lifting rack 106 cooperates with the right end of the gear 105. Both ends of the lifting spring 107 are respectively connected to the lower end of the lifting rack 106 and the inner wall of the housing 1. The upper end of the lifting rack 106 cooperates with the lower end of the lowermost screening plate 2. Here, the cooperation means that when the lifting rack 106 moves upward, the lifting rack 106 pushes the left end of the lowermost screening plate 2 upward, causing the screening plate 2 to tilt. The stabilizing unit is arranged in the housing 1. The lifting spring 107 can make the upper end of the lifting rack 106 always fit with the lowermost screening plate 2.

[0050] Specifically, the stabilizing unit includes a stabilizing groove 1081, a transverse pushing groove 1082, a transverse pushing spring 1083, a transverse pushing block 1084, a stabilizing ring 1085, a reset spring 1086 and a reset retaining ring 1087. The stabilizing groove 1081 is provided in the housing 1, and the hinge column 97 is slidably connected to the stabilizing groove 1081. The stabilizing groove 1081 includes a transverse moving section 10811, an arc section 10812 and a locking section 10813. The transverse pushing groove 1082 is provided in the stabilizing groove 1081. At the lower end, the horizontal push block 1084 is slidably connected in the stable groove 1081, and the two ends of the horizontal push spring 1083 are respectively connected to the left end of the horizontal push block 1084 and the inner wall of the shell 1, and the upper end of the horizontal push block 1084 extends into the lateral movement section 10811 of the horizontal push groove 1082. The upper end of the horizontal push block 1084 is provided with an unlocking chamfer, and the stable ring 1085 is fixedly connected to the rear end of the gear 105. The rear end of the stable ring 1085 is provided with a stable chamfer 1085, and the stable chamfer 1085 is connected to the horizontal push block 1 084 right end cooperates, and the cooperation here means that when the horizontal push block 1084 moves to the right under the action of the horizontal push spring 1083, the right end of the horizontal push block 1084 gradually fits with the stable chamfer 1085, and pushes the stable ring 1085 forward along the stable chamfer 1085, and the stable ring 1085 moves forward to drive the gear 105 to move forward until the left end of the horizontal push block 1084 moves completely to the rear end of the stable ring 1085, so that the front end of the horizontal push block 1084 and the stable ring The rear end of 1085 fits in, and at this time, the gear 105 is completely moved to the middle of the retreat rack 103 and the lifting rack 106, so that the two ends of the gear 105 cooperate with the retreat rack 103 and the lifting rack 106, and the reset retaining ring 1087 is set at the front end of the gear 105, and the reset retaining ring 1087 rotates synchronously with the gear 105. The two ends of the reset spring 1086 are respectively connected to the front end of the gear 105 and the rear end of the reset retaining ring 1087, and the front end of the reset retaining ring 1087 fits in with the shell 1.

[0051] Specifically, the inner diameter of the mesh 21 of the screening plate 2 increases from top to bottom, and the shape of the blocking block 46 matches the shape of the mesh 21, so that after the blocking block 46 blocks the mesh 21, after being subjected to a certain force, the blocking block 46 can slide out of the mesh 21, and a blocking block is provided on the lower side of the right end of the screening plate 2. When the blocking block 46 of the blocking plate 3 blocks the mesh 21, the right end of the blocking plate 3 fits into the blocking block.

[0052] Specifically, the stabilizing groove 1081 includes a transverse movement section 10811, an arc section 10812, and a locking section 10813. There are multiple locking sections 10813, which are distributed at intervals on the arc section 10812. The arc section 10812 is concentric with the clamping turntable 94. When the fixed block 993 is located on the left side of the fixed ring 995, the hinge column 97 at the rear end of the plugging connecting rod 6 is located in the transverse movement section 10811. The transverse movement section 10811 can effectively limit the longitudinal movement of the plugging plate 3, so that the screening plate 2 in the housing 1 will not have longitudinal deviation during transverse screening, preventing the fixed block 993 from moving to the upper end of the fixed ring 995 during transverse screening. After the fixed block 993 moves to the upper end of the fixed ring 995, the plugging plate 3 moves to the right end of the screening plate 2 under the action of the screening plate spring 42. At the same time, the transverse push block 1084 moves to the right under the action of the transverse push spring 1083 until the hinge column 97 moves to the locking section 10813 at the junction of the transverse movement section 10811 and the arc section 10812. At this time, the front end of the transverse push block 1084 fits with the rear end of the stabilizing ring 1085. The gear 105 cooperates with the retracting rack 103 and the lifting rack 106, and the plugging block 46 completely blocks the mesh 21. When the left end of the screening plate 2 is lifted, the screening plate 2 drives the plugging plate 3 and the hinge column 97 to move upward along the arc section 10812. At this time, there is a slight displacement between the plugging plate 3 and the screening plate 2, and the plugging plate 3 slightly compresses the screening plate spring 42, so that the plugging block 46 opens a small part along the curvature of the mesh 21. When the left end of the screening plate 2 stops lifting, at this time, the hinge column 97 slides into the upper locking section 10813 again under the action of the screening plate spring 42 on the plugging plate 3, its own gravity, and the acting force between the plugging block 46, the plugging spring 44 and the mesh 21, so that the lifted screening plate 2 will not move downward and reset.

[0053] Specifically, the weighing component 5 includes a fitting groove 51, a fitting plate 53, a fitting spring 52, a material taking groove 54 and a weighing platform (not shown in the figure). An outlet 11 is provided at the right end of the housing 1. The fitting groove 51 is formed in the housing 1. The fitting plate 53 is slidably connected in the fitting groove 51. The two ends of the fitting spring 52 are respectively connected to the upper end of the fitting plate 53 and the inner wall of the housing 1. The material taking groove 54 is formed in the fitting plate 53. The upper end of the screening plate 2 is in contact with the upper end of the material taking groove 54. During the process of the left end of the screening plate 2 being lifted and tilted, the upper part of the right end of the screening plate 2 is always in contact with the fitting plate 53, preventing the materials on the screening plate 2 from rolling out of the screening plate 2 when the screening plate 2 is tilted or screened. A telescopic cylinder (not shown in the figure) is provided at the bottom of the fitting plate 53. The telescopic cylinder is fixedly connected to the housing 1 and can be controlled by the operator to drive the fitting plate 53 to move upward to compress the fitting spring 52 and make the material taking groove 54 communicate with the upper end of the screening plate 2, so that the materials can roll through the material taking groove 54 onto the weighing platform. The weighing platform is fixedly connected to the right side of the housing 1 on the chassis A. The left end of the weighing platform is slidably connected to the right end of the housing 1. The weighing platforms are provided in multiple numbers corresponding to the number of screening plates 2. Each weighing platform has a weighing function. The weighing platforms are arranged at the lower left side of the outlet 11 of the housing 1, so that when the telescopic cylinder lifts the fitting plate 53, the materials on the screening plate 2 can be automatically dumped onto the weighing platform outside the housing 1 for automatic weighing.

[0054] Specifically, an unlocking plate 12 is provided at the rear end of the housing 1. The unlocking plate 12 is connected to the hinge column 97. The unlocking chamfer cooperates with the hinge column 97. Here, the cooperation means that when the hinge column 97 moves from the arc section 10812 to the transverse movement section 10811, the hinge column 97 can be in contact with the unlocking chamfer and push the transverse push block 1084 to the left along the unlocking chamfer until the hinge column 97 completely moves to the right end of the transverse push block 1084.

[0055] The rest of the structure is the same as that of Embodiment 2.

[0056] Working principle: When it is necessary to take out and weigh the sieved materials, the operator only needs to control the reverse rotation of motor B, so that the plugging plate 3 first moves to the right relative to the screening plate 2 to plug the mesh 21 of the screening plate 2. During the process of the plugging plate 3 moving to the right, the plugging plate 3 drives the plugging connecting rod 6 and the hinge column 97 to move to the right. The hinge column 97 moves along the transverse movement section 10811 of the stable groove 1081 to the locking section 10813 at the junction of the transverse movement section 10811 and the arc section 10812. The transverse push block 1084 moves to the right under the action of the transverse push spring 1083. The right end of the transverse push block 1084 gradually fits with the stable chamfer 1085 and pushes the stable ring 1085 forward along the stable chamfer 1085. The forward movement of the stable ring 1085 drives the gear 105 to move forward until the left end of the transverse push block 1084 completely moves to the rear of the stable ring 1085, and the front end of the transverse push block 1084 fits with the rear end of the stable ring 1085. At this time, the gear 105 moves to the middle of the retracting rack 103 and the lifting rack 106, so that both ends of the gear 105 cooperate with the retracting rack 103 and the lifting rack 106.

[0057] When the cam 71 rotates in reverse and drives the housing 1 to move up and down along the longitudinal screening column 74, when the housing 1 moves downward, the housing 1 drives the gear 105 to gradually fit with the retracting chamfer 104 on the retracting rack 103 and pushes the retracting rack 103 to the left along the retracting chamfer 104, so that the retracting rack 103 compresses the retracting spring 102. When the housing 1 moves upward and resets under the action of the longitudinal screening spring 75, the housing 1 drives the gear 105 to move upward, so that the lower end of the retracting rack 103 meshes with the gear 105, enabling the gear 105 to rotate under the action of the retracting rack 103, thereby driving the lifting rack 106 at the right end of the gear 105 to move upward, causing the left end of the lowest-layer screening plate 2 to move upward, and enabling the screening plate 2 to rotate a certain angle along the clamping turntable 94, and the screening plate 2 tilts upward at a certain angle from left to right.

[0058] When the left end of the screening plate 2 is lifted, the screening plate 2 drives the plugging plate 3 and the hinge column 97 to move upward along the arc section 10812. At this time, a slight displacement occurs between the plugging plate 3 and the screening plate 2, and the plugging plate 3 slightly compresses the sieve plate spring 42, so that the plugging block 46 slightly opens a part along the curvature of the mesh 21. When the left end of the screening plate 2 stops lifting, at this time, under the action of the sieve plate spring 42 on the plugging plate 3, its own gravity, and the acting force between the plugging block 46, the plugging spring 44 and the mesh 21, the hinge column 97 slides into the upper locking section 10813 again, and the plugging block 46 completely plugs the mesh 21 again, so that the lifted screening plate 2 will not move downward and reset. When the left end of the screening plate 2 is not lifted, the stability of the screening plate 2 is maintained.

[0059] After the cam 71 reverses for a period of time, the lifting rack 106 moves to the upper right of the gear 105, and the articulated column 97 moves to the locking section 10813 at the uppermost end. At this time, the screening plate 2 tilts to the maximum angle, and as the cam 71 continues to reverse, the housing 1 continuously vibrates up and down, driving the screening plate 2 to vibrate up and down. As a result, the materials on the screening plate 2 are vibrated and collected to the rightmost end of the screening plate 2. When weighing is required, the operator only needs to control the motor B to stop the rotation of the cam 71, and then control the telescopic cylinder to lift the fitting plate 53, so that the materials on the screening plate 2 can be automatically poured onto the weighing platform outside the housing 1 for automatic weighing, achieving accurate detection of the total mass of material particles of different sizes, thereby calculating the crushing effect of the materials, facilitating subsequent adjustment of the crushing effect of the materials, ensuring the accuracy of the detection, making it more convenient to take out the materials, and there will be no residue on the mesh 21 of the screening plate 2.

[0060] When it is necessary to reset the screening plate 2 and the blocking plate 3 after the detection, the operator only needs to pull the unlocking plate 12 at the rear end of the housing 1, so that the unlocking plate 12 drives the articulated column 97 out of the unlocking section, and moves the articulated column 97 along the upper end of the arc section 10812 to the right end of the transverse movement section 10811, so that the screening plate 2 and the blocking plate 3 rotate along the clamping turntable 94 and return to the horizontal position. When the articulated column 97 moves from the arc section 10812 to the transverse movement section 10811, the articulated column 97 can fit with the unlocking chamfer and push the transverse push block 1084 to the left along the unlocking chamfer until the articulated column 97 completely moves to the right end of the transverse push block 1084. Then the operator pushes the unlocking plate 12, so that the unlocking plate 12 drives the articulated column 97 to move to the left. The articulated column 97 drives the transverse push block 1084, the blocking link 6, and the blocking plate 3 to move to the left. The transverse push block 1084 moves to the left and squeezes the transverse push spring 1083, so that the transverse push block 1084 moves to the right end of the stabilizing ring 1085. The stabilizing ring 1085 and the gear 105 move backward under the action of the return spring 1086. The gear 105 disengages from the cooperation with the retracting rack 103 and the lifting rack 106 until the fixed block 993 moves to the left end of the fixed ring 995. At this time, the blocking plate 3 and the screening plate 2 are horizontally relatively fixed, the mesh 21 is completely opened and communicated with the material passing groove 43 on the blocking plate 3, and the gear 105 is not connected to the retracting rack 103 and the lifting rack 106, so that when the cam 71 rotates forward, the sieve plate can realize the function of longitudinal screening of the horizontal screening machine again.

[0061] Embodiment 4

[0062] A screening method is provided, including the particle automatic screening and weighing device of the above embodiments, and the following steps:

[0063] By controlling the motor B to drive the cam 71 to rotate forward, the cam 71 cooperates with the horizontal screening block 96 to drive the screening plate 2 to vibrate left and right for screening in the housing 1;

[0064] By controlling the motor B to drive the cam 71 to rotate forward, the cam 71 cooperates with the horizontal sieve block 96 to drive the sieve plate 2 to vibrate left and right for screening inside the housing 1;

[0065] By controlling the motor B to drive the cam 71 to rotate, the cam 71 cooperates with the longitudinal sieve plate 72 to drive the housing 1 to vibrate up and down for screening on the chassis A;

[0066] By controlling the motor B to drive the cam 71 to rotate in the reverse direction, the cam 71 cooperates with the horizontal sieve block 96 and the plugging component 4 to plug the mesh 21 of the sieve plate 2;

[0067] By setting the lifting component 10, after the mesh 21 is plugged, the lifting component 10 cooperates with the up and down vibration of the housing 1 to lift one side of the sieve plate 2.

[0068] By arranging the cam 71 on the chassis A, when the cam 71 rotates forward, it cooperates with the longitudinal sieve component 7 and the horizontal sieve component 9 to drive the sieve plate 2 to perform horizontal and longitudinal sieving on the material at its upper end. By setting the plugging component 4, when the cam 71 rotates in the reverse direction, the plugging block 46 can plug the mesh 21 of the sieve plate 2 and clean the material stuck in the mesh 21 above the sieve plate 2. By setting the lifting component 10, when the cam 71 rotates in the reverse direction, the sieve plate 2 can be gradually tilted, facilitating the taking out and weighing of the material, accelerating the material taking-out speed, and ensuring the accuracy of the measurement of the crushing degree of the material particles.

[0069] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not restrictive. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A particle automatic screening and weighing device, characterized in that: It includes a screening plate (2), a sealing plate (3), a sealing component (4), a weighing component (5), a longitudinal screening component (7), a cam (71), a transverse screening component (9) and a lifting component (10). The sealing plate (3) is slidably connected to the screening plate (2). The cam (71) is arranged on the left side of the screening plate (2). When the cam (71) rotates forward, the longitudinal screening component (7) causes the whole housing (1) to move up and down. When the cam (71) rotates forward, the transverse screening component (9) keeps the screening plate (2) and the sealing plate (3) horizontally fixed and drives the screening plate (2) to move left and right. When the cam (71) rotates reversely, the sealing component (4) releases the horizontal fixation between the sealing plate (3) and the screening plate (2) and cooperates with the sealing plate (3) to block the mesh holes (21) of the screening plate (2). After the horizontal fixation between the sealing plate (3) and the screening plate (2) is released, the lifting component (10) cooperates with the longitudinal screening component (7) to lift the left end of the screening plate (2) so that the materials on the screening plate (2) roll to the right. After being opened, the weighing component (5) collects the materials for automatic weighing.

2. The particle automatic screening and weighing device according to claim 1, characterized in that: The longitudinal screening component (7) includes a longitudinal screening plate (72), a longitudinal screening groove (73), a longitudinal screening column (74) and a longitudinal screening spring (75). The longitudinal screening plate (72) is fixed to the left side of the housing (1). The longitudinal screening groove (73) is opened at the bottom of the housing (1). The longitudinal screening column (74) is fixed to the upper end of the chassis (A). The longitudinal screening column (74) is slidably connected to the longitudinal screening groove (73). A longitudinal screening spring (75) is connected between the housing (1) and the chassis (A). The cam (71) cooperates with the longitudinal screening plate (72).

3. The particle automatic screening and weighing device according to claim 1, characterized in that: The transverse screening component (9) includes a transverse screening baffle (91), a transverse screening spring (92), a turntable baffle (93), a clamping turntable (94), a transverse screening chamfer (95), a transverse screening block (96), a hinged column (97), a hinged rod (98) and a synchronization unit. A sealing connecting rod (6) is arranged on the left side of the sealing plate (3). A switching rod (8) is slidably connected inside the sealing connecting rod (6). The transverse screening block (96) is fixed to the left end of the switching rod (8). The transverse screening chamfer (95) is opened at the upper end of the transverse screening block (96). The transverse screening chamfer (95) cooperates with the cam (71). The synchronization unit is arranged on the side of the switching rod (8) and is used to make the screening plate (2) and the sealing plate (3) move synchronously. The hinged column (97) is fixed to the rear end of the sealing connecting rod (6). The hinged rod (98) is fixed to the left side of the sealing plate (3). The sealing connecting rod (6) is rotatably connected to the sealing connecting rod (6) through the hinged rod (98) and the hinged column (97). The transverse screening baffle (91) is fixed to the screening plate (2). The clamping turntable (94) is rotatably connected inside the housing (1). The screening plate (2) is slidably connected to the clamping turntable (94). The turntable baffle (93) is fixed to the clamping turntable (94). A transverse screening spring (92) is connected between the transverse screening baffle (91) and the turntable baffle (93).

4. The particle automatic screening and weighing device according to claim 3, characterized in that: The synchronization unit includes a fixing groove (991), a fixing spring (992), a fixing block (993), a fixing chamfer (994) and a fixing ring (995). The fixing groove (991) is formed in the blocking connecting rod (6), the switching rod (8) is slidably connected to the fixing groove (991), a fixing spring (992) is connected between the upper end of the switching rod (8) and the inner wall of the blocking connecting rod (6), the fixing block (993) is arranged on the left side of the switching rod (8), the fixing chamfer (994) is formed on the fixing block (993), the fixing ring (995) is fixedly connected to the lower left side of the screening plate (2), and the fixing ring (995) cooperates with the fixing block (993).

5. The particle automatic screening and weighing device according to claim 3, characterized in that: The blocking component (4) includes a sieve plate groove (41), a sieve plate spring (42), a material passing groove (43), a blocking spring (44), a blocking groove (45) and a blocking block (46). The sieve plate groove (41) is formed in the screening plate (2), the blocking plate (3) is slidably connected to the sieve plate groove (41), a sieve plate spring (42) is connected between the front end of the blocking plate (3) and the inner wall of the screening plate (2), the blocking groove (45) is formed in the blocking plate (3), the blocking block (46) is slidably connected to the blocking groove (45), a blocking spring (44) is connected between the blocking block (46) and the blocking plate (3), the upper end of the blocking block (46) cooperates with the mesh (21), the material passing groove (43) is formed in the blocking plate (3), and the material passing groove (43) cooperates with the mesh (21).

6. The particle automatic screening and weighing device according to claim 5, wherein: The lifting component (10) includes a retracting groove (101), a retracting spring (102), a retracting rack (103), a retracting chamfer (104), a gear (105), a lifting rack (106), a lifting spring (107) and a stabilizing unit. The retracting groove (101) is formed in the longitudinal screening column (74), the retracting rack (103) is slidably connected to the retracting groove (101), a retracting spring (102) is connected between the left end of the retracting rack (103) and the inner wall of the longitudinal screening column (74), the retracting chamfer (104) is formed on the retracting groove (101), the gear (105) is rotatably connected to the bottom of the housing (1), the retracting chamfer (104) cooperates with the gear (105), the lifting rack (106) is longitudinally slidably connected in the housing (1), the lifting rack (106) cooperates with the right end of the gear (105), a lifting spring (107) is connected between the lower end of the lifting rack (106) and the inner wall of the housing (1), the upper end of the lifting rack (106) cooperates with the lower end of the lowermost screening plate (2), and the stabilizing unit is arranged in the housing (1).

7. The particle automatic screening and weighing device according to claim 6, characterized in that: The stabilizing unit includes a stabilizing groove (1081), a transverse pushing groove (1082), a transverse pushing spring (1083), a transverse pushing block (1084), a stabilizing ring (1085), a reset spring (1086) and a reset retaining ring (1087). The stabilizing groove (1081) is formed in the housing (1), and the hinge post (97) is slidably connected to the stabilizing groove (1081). The stabilizing groove (1081) includes a transverse movement section (10811), an arc section (10812) and a locking section (10813). The transverse pushing groove (1082) is formed at the lower end of the stabilizing groove (1081). The transverse pushing block (1084) is slidably connected in the stabilizing groove (1081). A transverse pushing spring (1083) is connected between the left end of the transverse pushing block (1084) and the inner wall of the housing (1). The upper end of the transverse pushing block (1084) extends into the transverse movement section (10811) of the transverse pushing groove (1082). An unlocking chamfer is provided at the upper end of the transverse pushing block (1084), and the unlocking chamfer cooperates with the hinge post (97). The stabilizing ring (1085) is fixedly connected to the rear end of the gear (105). A stabilizing chamfer (1085) is provided at the rear end of the stabilizing ring (1085), and the stabilizing chamfer (1085) cooperates with the right end of the transverse pushing block (1084). The reset retaining ring (1087) is provided at the front end of the gear (105), and the reset retaining ring (1087) rotates synchronously with the gear (105). A reset spring (1086) is connected between the front end of the gear (105) and the rear end of the reset retaining ring (1087). The front end of the reset retaining ring (1087) is in contact with the housing (1).

8. The particle automatic screening and weighing device according to claim 7, wherein: The weighing component (5) includes a fitting groove (51), a fitting spring (52), a fitting plate (53) and an object taking groove (54). An outlet (11) is provided at the right end of the housing (1). The fitting groove (51) is formed in the housing (1). The fitting plate (53) is slidably connected in the fitting groove (51). A fitting spring (52) is connected between the upper end of the fitting plate (53) and the inner wall of the housing (1). The object taking groove (54) is formed in the fitting plate (53). The upper end of the screening plate (2) is in contact with the upper end of the object taking groove (54).

9. The particle automatic screening and weighing device according to claim 3, characterized in that: An unlocking plate (12) is provided at the rear end of the housing (1), and the unlocking plate (12) is connected to the hinge post (97).

10. A screening method, characterized in that: The particle automatic screening and weighing device according to any one of claims 1 to 9 includes the following steps; By the forward rotation of the cam (71), the cam (71) cooperates with the transverse screening block (96) to drive the screening plate (2) to vibrate left and right for screening in the housing (1); By the rotation of the cam (71), the cam (71) cooperates with the longitudinal screening plate (72) to drive the housing (1) to vibrate up and down for screening on the chassis (A); By the reverse rotation of the cam (71), the cam (71) cooperates with the transverse screening block (96) and the blocking component (4) to block the mesh holes (21) of the screening plate (2); By setting the lifting member (10), after the mesh (21) is blocked, the lifting member (10) cooperates with the up-and-down vibration of the housing (1) to lift one side of the screening plate (2); By arranging a weighing platform on the side of the screening plate (2), after one side of the screening plate (2) is lifted, the material automatically rolls onto the weighing platform for weighing.

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