Automatic composite screening and weighing device for fine ammonium perchlorate and working method of automatic composite screening and weighing device

Abstract

The invention discloses an automatic composite screening and weighing device for fine ammonium perchlorate and a working method of the automatic composite screening and weighing device. The automatic composite screening and weighing device comprises a lifting and pouring mechanism, a short vibration feeding mechanism, a screening mechanism, a long vibration feeding mechanism and a weighing mechanism. The lifting and pouring mechanism comprises a charging barrel, the lifting and pouring mechanism can achieve lifting and rotary pouring of the charging barrel, ammonium perchlorate in the charging barrel is poured into the short vibration feeding mechanism, the short vibration feeding mechanism is used for achieving vibration feeding of the ammonium perchlorate to the screening mechanism, the screening mechanism comprises a screen, and the screen is used for filtering the ammonium perchlorate with different granularities. The long vibration feeding mechanism is used for feeding the ammonium perchlorate filtered by the screening mechanism into a charging bucket, and the charging bucket is positioned on the weighing mechanism. Through combination and cooperation of a plurality of functional units, automatic compounding, sieving and weighing of ammonium perchlorate can be realized, unmanned material pouring process and automatic sieving and weighing can be automatically improved, the working efficiency is improved, and the safety risk of personnel contact is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of ammonium perchlorate production, and in particular relates to an automatic composite screening and weighing device for fine ammonium perchlorate and a working method thereof. Background Art

[0002] At present, fine ammonium perchlorate needs to be manually transported to the screening station, screened manually, weighed after screening, and loaded into the material tank. Since the screening amount is limited and the time is long each time, it needs to be weighed in batches multiple times. The ammonium perchlorate in the material tank will be transferred to the next process only after it reaches a certain weight. Crusher with different particle sizes cannot enter the same screening device at the same time, resulting in low utilization rate of the screening device. At the same time, ammonium perchlorate is a hazardous chemical, which is sensitive to heat, temperature, impact, friction, static electricity and sparks. During the manual screening process, the fine ammonium perchlorate rubs against the screen, which can easily cause static electricity accumulation and high-concentration dust. In addition, fine ammonium perchlorate has strong water absorption. Multiple manual screening and inaccurate weight accuracy after weighing will cause certain troubles to the mixing process in the subsequent process. During the screening and weighing process, workers will often come into contact with ammonium perchlorate, which is very harmful to personnel health; the efficiency of manual screening is not high, and there are safety accidents caused by improper operation of personnel; multiple batches of manual weighing are required to complete the screening, which makes the ammonium perchlorate exposed to the air for a long time, resulting in inaccurate weighing, and there are dangers such as high dust and static electricity accumulation in the manual screening and weighing process, which poses a great safety hazard. Summary of the invention

[0003] In view of the above technical problems, the present invention provides an automatic composite screening and weighing device for fine ammonium perchlorate and a working method thereof, which realizes the requirements of automatic composite screening and weighing of fine ammonium perchlorate, achieves human-machine isolation, and avoids safety risks.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] An automatic composite screening and weighing device for fine ammonium perchlorate, comprising a lifting and pouring mechanism, a short vibration feeding mechanism, a screening mechanism, a long vibration feeding mechanism and a weighing mechanism;

[0006] The lifting and pouring mechanism includes a barrel, and the lifting and pouring mechanism can realize the lifting and rotating pouring of the barrel, and pour the ammonium perchlorate in the barrel into the short vibration feeding mechanism, and the short vibration feeding mechanism is used to realize the vibration feeding of ammonium perchlorate to the screening mechanism, and the screening mechanism includes a screen, and the screen is used to filter ammonium perchlorate of different particle sizes. The long vibration feeding mechanism is used to feed the ammonium perchlorate filtered by the screening mechanism into a material tank, and the material tank is located on the weighing mechanism.

[0007] Furthermore, the screening mechanism also includes a screening silo, a rake plate, a rotating assembly, a translation assembly, a lifting assembly and a lower silo assembly, the screen is located at the bottom of the screening silo, the inlet of the screening silo is connected to the outlet of the short vibration feeding mechanism, the rake plate is fixed on the rotating assembly, the rake plate is used to apply a flexible extrusion force to the ammonium perchlorate material to screen the material, the rotating assembly is used to drive the rake plate to rotate, the translation assembly can drive the rotating assembly to move left and right, the lifting assembly can drive the rotating assembly to move up and down, and the lower silo assembly is used to realize the connection between the screening silo and the long vibration feeding mechanism.

[0008] Furthermore, the screening silo comprises at least two inlets.

[0009] Furthermore, the rake plate includes a stainless steel body, a static conductive rubber, a pressure plate, a locking pad, and an oil receiving groove. The pressure plate is fixedly connected to the bottom of the stainless steel body. The static conductive rubber is fixed on the pressure plate for stirring ammonium perchlorate powder. The locking pad is used to lock the pressure plate and the stainless steel body. The oil receiving groove is located on the stainless steel body and on the upper part of the pressure plate.

[0010] Furthermore, the rotating component includes a bracket, a motor, a reducer, a driving shaft, a seal and a bearing. The bracket is used to support the rotating component. The motor is connected to one end of the driving shaft through the reducer. The other end of the driving shaft is connected to the stainless steel body. The seal and the bearing are arranged on the outside of the driving shaft.

[0011] Furthermore, the translation assembly includes a translation cylinder and a translation linear guide, the lifting assembly includes a lifting cylinder and a lifting linear guide, the lower bin assembly includes a lower bin, a flexible connection and a pneumatic vibrator, the lower bin is connected to the screening bin, the flexible connection is connected to the long vibration feeding mechanism, and the pneumatic vibrator is located outside the lower bin.

[0012] Furthermore, the lifting and unloading mechanism also includes a vertical lifting component, a rotating motion component and a clamping component. The vertical lifting component can drive the rotating motion component to move up and down. The rotating motion component drives the slewing support through a motor to realize ° rotational movement. The clamping component can clamp the barrel. The clamping component is fixed on the slewing support. When the slewing support rotates, it can drive the clamping component to rotate, thereby realizing the rotation and unloading of the barrel.

[0013] Furthermore, the short vibration feeding mechanism includes a first driver, a feeder bin body, a feeder bin cover and a first locking bolt. The first driver is located at the bottom of the feeder bin body and can realize high-frequency vibration feeding. The feeder bin body is welded into a rectangle with stainless steel, and the feeding port is a bell mouth. The feeder bin cover is fixed to the feeder bin body by a first locking bolt.

[0014] The long vibration feeding mechanism includes a second driver, a feeding bin body, a feeding bin cover and a second locking bolt. The second driver is located at the bottom of the feeding bin cover and can realize high-frequency vibration feeding. The feeding bin body is welded into a long rectangle with stainless steel. The inlet of the feeding bin body is connected with the outlet of the screening mechanism, and the outlet of the feeding bin body is connected with the material tank. The feeding bin cover is fixed to the feeding bin body by the second locking bolt.

[0015] Furthermore, it also includes a dust removal port, a discharging and blocking mechanism, the dust removal port is located at the upper end of the long vibrating feeding mechanism, the discharging and blocking mechanism includes a discharging mechanism assembly and a blocking mechanism assembly, the discharging docking mechanism includes a first cylinder, a first linear guide rail, an anti-static cover, a connecting bracket, a sealing cover and a telescopic tube, one end of the connecting bracket is connected to the first linear guide rail, and the other end is connected to the sealing cover, the first cylinder is used to drive the connecting bracket to move in the vertical direction along the first linear guide rail, the anti-static cover is used for dust prevention of the first linear guide rail, the upper end of the telescopic tube is connected to the outlet of the long vibrating feeding mechanism, and the lower end is connected to the sealing cover, the sealing cover and the telescopic tube are connected at a hole, and the sealing cover is used to seal the material tank mouth when loading;

[0016] The material blocking mechanism assembly includes a rotating cylinder, a material blocking plate, a connecting shaft, a guide sleeve, and a second cylinder. The material blocking plate is used to block the outlet of the long vibration feeding mechanism. The material blocking plate is connected to the connecting shaft. The rotating cylinder is used to drive the material blocking plate to rotate. The guide sleeve is used for linear guidance of the connecting shaft. The second cylinder is used to drive the material blocking plate to move up and down.

[0017] A working method of an automatic composite screening and weighing device for fine ammonium perchlorate comprises the following steps:

[0018] First, the unloading mechanism is lifted to lift the barrel to a predetermined height. The rotating motion component is connected to the inlet of the short vibration feeding mechanism by continuously adjusting the angle of the barrel. The ammonium perchlorate is poured into the feeder bin of the short vibration feeding mechanism. The outlet of the short vibration feeding mechanism is connected to the inlet of the screening mechanism through an anti-static soft cloth. When the ammonium perchlorate is transported to the screening bin of the screening mechanism, the rotating component on the screening mechanism drives the rake plate to rotate and squeeze the ammonium perchlorate at different speeds. The extruded ammonium perchlorate is screened through the screen. After screening, the ammonium perchlorate powder enters the feeding bin of the long vibration feeding mechanism and is vibrated. After feeding, the material is sent to the outlet of the feeding silo. When it is about to reach the outlet, the material blocking plate of the material blocking mechanism assembly is moved away from under the outlet of the feeding silo. The first cylinder of the discharging mechanism assembly drives the sealing cover to move downward to the inlet of the material tank. At the same time, the telescopic tube also moves downward synchronously, so that the outlet of the long vibrating feeding mechanism is connected with the inlet of the material tank. The ammonium perchlorate powder enters the material tank from the outlet of the feeding silo through the telescopic tube. When the weight of the material tank reaches the set value, the long vibrating feeding mechanism slows down the feeding until it stops. At this time, the discharging mechanism assembly lifts the sealing cover, and the material blocking plate of the material blocking mechanism assembly blocks the outlet of the telescopic tube to transfer the material tank away.

[0019] Compared with the prior art, the advantages of the present invention include:

[0020] (1) The present invention, through the new design of the device, can realize the automation of the automatic composite screening and weighing of ammonium perchlorate through the combination and coordinated cooperation of multiple functional units, the automatic lifting and unloading process is unmanned, the screening and weighing are automated, and the multiple entrances of the screening silo can improve the utilization rate of the screening device, improve work efficiency, and reduce the safety risk of human contact;

[0021] (2) The present invention has carried out targeted innovative design on the screening mechanism, so that its structure and function are reasonable, and its operation is stable, flexible and efficient.

[0022] In addition to the features and advantages described above, the principles and other features and advantages of the present invention are further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the automatic composite screening and weighing device for fine ammonium perchlorate.

[0024] Figure 2 It is a top view of the structure of the automatic composite screening and weighing device for fine ammonium perchlorate.

[0025] Figure 3 It is a schematic diagram of the overall structure of the lifting and pouring mechanism.

[0026] Figure 4 It is a schematic diagram of the partial structure of the lifting and pouring mechanism.

[0027] Figure 5 It is a schematic diagram of the short vibration feeding mechanism structure.

[0028] Figure 6 It is a three-dimensional diagram of the short vibration feeding mechanism.

[0029] Figure 7 It is a schematic diagram of the screening mechanism structure.

[0030] Figure 8 It is a schematic diagram of the screening mechanism structure.

[0031] Fig. 9 It is a schematic diagram of the rake plate structure.

[0032] Fig.10 It is a schematic diagram of the rotating component structure.

[0033] Fig.11 It is a schematic diagram of the structure of the lower silo component.

[0034] Fig.12 It is a schematic diagram of the structure of the long vibration feeding mechanism.

[0035] Fig.13 It is a schematic diagram of the structure of the discharging and blocking mechanism.

[0036] Fig.14 It is a schematic diagram of the structure of the discharge mechanism components.

[0037] Fig.15 It is a schematic diagram of the structure of the material blocking mechanism component. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. The implementation of the present invention is described in detail below in conjunction with the specific embodiments.

[0039] Combination Figure 1-7 The invention discloses an automatic composite screening and weighing device for fine ammonium perchlorate, comprising a lifting and pouring mechanism 1, a short vibration feeding mechanism 2, a screening mechanism 3, a long vibration feeding mechanism 4 and a weighing mechanism 5. The weighing mechanism 5 is an electronic platform scale, which can realize the weighing of fine ammonium perchlorate and feedback signals.

[0040] The lifting and unloading mechanism 1 includes a barrel 11, and the lifting and unloading mechanism 1 can realize the lifting and rotating unloading of the barrel 11, and pour the ammonium perchlorate in the barrel 11 into the short vibration feeding mechanism 2. The short vibration feeding mechanism 2 is used to realize the vibration feeding of ammonium perchlorate to the screening mechanism 3. The screening mechanism 3 includes a screen 17, and the screen 17 is used to filter ammonium perchlorate of different particle sizes. The long vibration feeding mechanism 4 is used to feed the ammonium perchlorate filtered by the screening mechanism 3 into a material tank, and the material tank is located on the weighing mechanism 5.

[0041] Preferably, combined Figure 7-8 The screening mechanism 3 also includes a screening bin 16, a rake plate 18, a rotating assembly 19, a translation assembly 20, a lifting assembly 21, a window 22 and a lower bin assembly 23. The screen 17 is located at the bottom of the screening bin 16. The screen 17 can be stamped into a disc shape using a 316 stainless steel plate, and the filter screen is then punched to filter ammonium perchlorate powder of different particle sizes by replacing different screen apertures. The inlet of the screening bin 16 is connected to the outlet of the short vibration feeding mechanism 2, and the rake plate 18 is fixed. On the rotating assembly 19, the rake plate 18 is used to apply a flexible extrusion force to the ammonium perchlorate material to screen the material. The rotating assembly 19 is used to drive the rake plate 18 to rotate. The translation assembly 20 can drive the rotating assembly 19 to move left and right. The lifting assembly 21 can drive the rotating assembly 19 to move up and down. The lower bin assembly 23 is used to realize the connection between the screening bin 16 and the long vibrating feeding mechanism 4. The window 22 is fixed on the bracket of the rotating assembly 19 for personnel to observe the inside of the screening bin 16.

[0042] Preferably, the screening bin 16 includes at least two inlets, one of which is connected to the outlet of the short vibration feeding mechanism 2, and the remaining inlets can be connected to the outlets of the remaining crushers to achieve a composite function. Crusher with different material particle sizes can be selected according to needs to perform the operation, thereby improving the applicability and working efficiency of the device.

[0043] Preferably, combined Fig. 9The rake plate 18 includes a stainless steel body 181 for conducting electricity, a static conductive rubber 182, a pressing plate 183, a locking pad 184, and an oil receiving groove 185 (for receiving materials when the reducer leaks oil). The pressing plate 183 is fixedly connected to the bottom of the stainless steel body 181, the static conductive rubber 182 is fixed on the pressing plate 183 for stirring ammonium perchlorate powder, the locking pad 184 is used to achieve the locking of the pressing plate 183 and the stainless steel body 181, and the oil receiving groove 185 is located on the stainless steel body 181 and on the upper part of the pressing plate 183. There is a gap of 5 to 20 mm between the rake plate body and the vibrating screen 17, and the middle gap is made of static conductive rubber 182 to fit the surface of the screen 17. An intermittent rake plate is used to apply a controllable flexible extrusion force to the material to screen the material.

[0044] Preferably, combined Fig.10 The rotating component 19 includes a bracket 191, a motor 192, a reducer 193, a driving shaft 194, a seal 195 and a bearing 196. The bracket 191 is used to support the rotating component 19. The motor 192 is connected to one end of the driving shaft 194 through the reducer 193. The other end of the driving shaft 194 is connected to the stainless steel body 181. The seal 195 and the bearing 196 are arranged on the outside of the driving shaft 194.

[0045] Preferably, combined Figure 8 The translation assembly 20 includes a translation cylinder 201 and a translation linear guide rail 202, and the lifting assembly 21 includes a lifting cylinder 211 and a lifting linear guide rail 212. Fig.11 The lower material bin assembly includes a lower material bin 231, a flexible connection 232 and a pneumatic vibrator 233. The lower material bin 231 is connected to the screening bin 16, the flexible connection 232 is connected to the long vibration feeding mechanism 4, and the pneumatic vibrator 233 is located outside the lower material bin 231.

[0046] Preferably, combined Figure 3-4 The lifting and unloading mechanism 1 also includes a vertical lifting component 8, a rotating motion component 9 and a clamping component 10. The vertical lifting component 8 is driven by a motor to drive a trapezoidal screw rod to drive the rotating motion component 9 to move up and down. The rotating motion component 9 drives a slewing support through a motor to achieve 360° rotation. The clamping component 10 uses a motor to drive a double spiral screw rod to achieve left and right clamping, and can clamp the barrel 11. The clamping component 10 is fixed on the slewing support. When the slewing support rotates, it can drive the clamping component 10 to rotate, so as to realize the rotating unloading of the barrel 11. The barrel 11 is formed by stamping an aluminum alloy round barrel.

[0047] Preferably, combined Figure 5-6The short vibration feeding mechanism 2 includes a first driver 12, a feeder bin body 13, a feeder bin cover 14 and a first locking bolt 15. The first driver 12 is located at the bottom of the feeder bin body 13 and can realize high-frequency vibration feeding. When the exciting force generated by the first driver 12 acts on the working conveying trough of the feeder bin body 13, the trough body performs directional forced vibration under the constraint of the main vibration spring to realize vibration feeding. The feeder bin body 13 is welded into a rectangle with stainless steel, and the feeding port is a trumpet mouth. The feeder bin cover 14 is cut and formed with anti-static transparent PC and is fixed to the feeder bin body 13 by the first locking bolt 15.

[0048] Combination Fig.12 The long vibration feeding mechanism 4 includes a second driver 24, a feeding bin body 25, a feeding bin cover 26 and a second locking bolt 27. The second driver 24 is located at the bottom of the feeding bin cover 26 to realize high-frequency vibration feeding. The feeding bin body 25 is welded into a long rectangle with stainless steel. The inlet of the feeding bin body 25 is connected to the outlet of the screening mechanism 3, and the outlet of the feeding bin body 25 is connected to the material tank. The feeding bin cover 26 is fixed to the feeding bin body 25 by the second locking bolt 27.

[0049] Preferably, combined Figure 1 , 13 -15, also includes a dust removal port 6, a discharging and blocking mechanism 7, the dust removal port 6 is located at the upper end of the long vibration feeding mechanism 4, and can collect dust during the vibration feeding process, the discharging and blocking mechanism 7 is used to block the residual powder at the outlet of the long vibration feeding mechanism 4 and to introduce the discharging, including a discharging mechanism assembly 28 and a blocking mechanism assembly 29, the discharging docking mechanism 28 includes a first cylinder 281, a first linear guide rail 282, an antistatic cover 283, a connecting bracket 284, a sealing cover 285 and a telescopic tube 286, One end of the connecting bracket 284 is connected to the first linear guide 282, and the other end is connected to the sealing cover 285. The first cylinder 281 is used to drive the connecting bracket 284 to move along the first linear guide 282 in the vertical direction. The antistatic cover 283 is used to prevent dust from the first linear guide. The upper end of the telescopic tube 286 is connected to the outlet of the long vibration feeding mechanism 4, and the lower end is connected to the sealing cover 285. The sealing cover 285 and the telescopic tube 286 are connected at a hole, and the sealing cover 285 is used to seal the material tank opening when loading.

[0050] The material blocking mechanism assembly 29 includes a rotating cylinder 291, a material blocking plate 292, a connecting shaft 293, a guide sleeve 294, and a second cylinder 295. The material blocking plate 292 is used to block the outlet of the long vibration feeding mechanism 4. The material blocking plate 292 is connected to the connecting shaft 293. The rotating cylinder 291 is used to drive the material blocking plate 292 to rotate. The guide sleeve 294 is used for linear guidance of the connecting shaft 293. The second cylinder 295 is used to drive the material blocking plate 292 to move up and down.

[0051] The working method of the fine ammonium perchlorate automatic composite screening and weighing device of the present invention comprises the following steps:

[0052] First, the unloading mechanism 1 is lifted to lift the barrel 11 to a predetermined height, and the rotating motion component 9 is connected to the inlet of the short vibration feeding mechanism 2 by continuously adjusting the angle of the barrel 11, and the ammonium perchlorate is poured into the feeder bin 13 of the short vibration feeding mechanism 2. The outlet of the short vibration feeding mechanism 2 is connected to the inlet of the screening mechanism 3 through an anti-static soft cloth. When the ammonium perchlorate is transported to the screening bin 16 of the screening mechanism 3, the rotating component 19 on the screening mechanism 3 drives the rake plate 18 to rotate and squeeze the ammonium perchlorate at different speeds. The extruded ammonium perchlorate is screened through the screen 17. After the screening is completed, the ammonium perchlorate powder enters the feeding bin 25 of the long vibration feeding mechanism 4, and is sent to the feeding bin after vibration feeding. At the outlet of the silo 25, when it is about to reach the outlet, the blocking plate 292 of the blocking mechanism assembly 29 is moved away from under the outlet of the feeding silo 25, and the first cylinder 281 of the discharging mechanism assembly 28 drives the sealing cover 285 to move downward to the entrance of the material tank, and at the same time, the telescopic tube 286 also moves downward synchronously, so that the outlet of the long vibrating feeding mechanism 4 is connected with the entrance of the material tank, and the ammonium perchlorate powder enters the material tank from the outlet of the feeding silo 25 through the telescopic tube 286. When the weight of the material tank reaches the set value, the long vibrating feeding mechanism 4 slows down the feeding until it stops. At this time, the discharging mechanism assembly 28 lifts the sealing cover 285, and at the same time, the blocking plate 292 of the blocking mechanism assembly 29 blocks the outlet of the telescopic tube 286 to transfer the material tank away.

[0053] Since fine ammonium perchlorate is a hazardous chemical, the device needs to have dust-proof, anti-static and explosion-proof safety designs. The present invention combines a lifting and pouring mechanism, a short vibration feeding mechanism, a screening mechanism, a long vibration feeding mechanism, a weighing mechanism, a dust removal mechanism, a discharging mechanism and a material blocking mechanism. Through the cooperation of several mechanisms, the requirements of automatic composite screening and weighing of fine ammonium perchlorate can be achieved, human-machine isolation can be achieved, and safety risks can be avoided.

[0054] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An automatic composite screening and weighing device for fine ammonium perchlorate, characterized in that: It comprises a lifting and pouring mechanism (1), a short vibration feeding mechanism (2), a screening mechanism (3), a long vibration feeding mechanism (4) and a weighing mechanism (5); The lifting and pouring mechanism (1) comprises a barrel (11), and the lifting and pouring mechanism (1) can realize the lifting and rotating pouring of the barrel (11), and pour the ammonium perchlorate in the barrel (11) into the short vibration feeding mechanism (2), and the short vibration feeding mechanism (2) is used to realize the vibration feeding of the ammonium perchlorate to the screening mechanism (3), and the screening mechanism (3) comprises a screen (17), and the screen (17) is used to filter ammonium perchlorate of different particle sizes. The long vibration feeding mechanism (4) is used to feed the ammonium perchlorate filtered by the screening mechanism (3) into a material tank, and the material tank is located on the weighing mechanism (5).

2. The automatic composite screening and weighing device for fine ammonium perchlorate according to claim 1, characterized in that: The screening mechanism (3) further comprises a screening bin (16), a rake plate (18), a rotating assembly (19), a translation assembly (20), a lifting assembly (21) and a lower bin assembly (23); the screen (17) is located at the bottom of the screening bin (16); the inlet of the screening bin (16) is connected to the outlet of the short vibration feeding mechanism (2); the rake plate (18) is fixed on the rotating assembly (19); the rake plate (18) is used to apply a flexible extrusion force to the ammonium perchlorate material to screen the material; the rotating assembly (19) is used to drive the rake plate (18) to rotate; the translation assembly (20) can drive the rotating assembly (19) to move left and right; the lifting assembly (21) can drive the rotating assembly (19) to move up and down; and the lower bin assembly (23) is used to realize the connection between the screening bin (16) and the long vibration feeding mechanism (4).

3. The automatic composite screening and weighing device for fine ammonium perchlorate according to claim 2, characterized in that: The screening bin (16) comprises at least two inlets.

4. The automatic composite screening and weighing device for fine ammonium perchlorate according to claim 3, characterized in that: The rake plate (18) comprises a stainless steel body (181), an electrostatic conductive rubber (182), a pressing plate (183), a locking pad (184), and an oil receiving groove (185); the pressing plate (183) is fixedly connected to the bottom of the stainless steel body (181); the electrostatic conductive rubber (182) is fixed on the pressing plate (183) for stirring ammonium perchlorate powder; the locking pad (184) is used to achieve locking of the pressing plate (183) and the stainless steel body (181); and the oil receiving groove (185) is located on the stainless steel body (181) and on the upper part of the pressing plate (183).

5. The automatic composite screening and weighing device for fine ammonium perchlorate according to claim 4, characterized in that: The rotating assembly (19) comprises a bracket (191), a motor (192), a reducer (193), a driving shaft (194), a seal (195) and a bearing (196); the bracket (191) is used to support the rotating assembly (19); the motor (192) is connected to one end of the driving shaft (194) via the reducer (193); the other end of the driving shaft (194) is connected to the stainless steel body (181); and the seal (195) and the bearing (196) are arranged outside the driving shaft (194).

6. The automatic composite screening and weighing device for fine ammonium perchlorate according to claim 5, characterized in that: The translation assembly (20) comprises a translation cylinder (201) and a translation linear guide rail (202); the lifting assembly (21) comprises a lifting cylinder (211) and a lifting linear guide rail (212); the lower bin assembly comprises a lower bin (231), a flexible connection (232) and a pneumatic vibrator (233); the lower bin (231) is connected to a screening bin (16); the flexible connection (232) is connected to a long vibration feeding mechanism (4); and the pneumatic vibrator (233) is located outside the lower bin (231).

7. The automatic composite screening and weighing device for fine ammonium perchlorate according to any one of claims 2 to 6, characterized in that: The lifting and unloading mechanism (1) also includes a vertical lifting component (8), a rotary motion component (9) and a clamping component (10). The vertical lifting component (8) can drive the rotary motion component (9) to move up and down. The rotary motion component (9) drives the rotary support through a motor to realize 360° rotation. The clamping component (10) can clamp the barrel (11). The clamping component (10) is fixed on the rotary support. When the rotary support rotates, it can drive the clamping component (10) to rotate, thereby realizing the rotation and unloading of the barrel (11).

8. The automatic composite screening and weighing device for fine ammonium perchlorate according to claim 7, characterized in that: The short vibration feeding mechanism (2) comprises a first driver (12), a feeder bin body (13), a feeder bin cover (14) and a first locking bolt (15); the first driver (12) is located at the bottom of the feeder bin body (13) and can realize high-frequency vibration feeding; the feeder bin body (13) is welded into a rectangle using stainless steel, and the feeding port is a bell-shaped port; the feeder bin cover (14) is fixed to the feeder bin body (13) by the first locking bolt (15); The long vibration feeding mechanism (4) comprises a second driver (24), a feeding bin body (25), a feeding bin cover (26) and a second locking bolt (27); the second driver (24) is located at the bottom of the feeding bin cover (26) and can realize high-frequency vibration feeding; the feeding bin body (25) is welded into a long rectangle using stainless steel; the inlet of the feeding bin body (25) is connected to the outlet of the screening mechanism (3); the outlet of the feeding bin body (25) is connected to the material tank; the feeding bin cover (26) is fixed to the feeding bin body (25) by the second locking bolt (27).

9. The automatic composite screening and weighing device for fine ammonium perchlorate according to claim 8, characterized in that: The invention also comprises a dust removal port (6), a material discharging and material blocking mechanism (7), wherein the dust removal port (6) is located at the upper end of the long vibration feeding mechanism (4), the material discharging and material blocking mechanism (7) comprises a material discharging mechanism assembly (28) and a material blocking mechanism assembly (29), the material discharging mechanism assembly (28) comprises a first cylinder (281), a first linear guide rail (282), an antistatic cover (283), a connecting bracket (284), a sealing cover (285) and a telescopic tube (286), one end of the connecting bracket (284) is connected to the first linear guide rail (28 2) connected, and the other end is connected to the sealing cover (285), the first cylinder (281) is used to drive the connecting bracket (284) to move along the first linear guide rail (282) in the vertical direction, the antistatic cover (283) is used to prevent dust on the first linear guide rail, the upper end of the telescopic tube (286) is connected to the outlet of the long vibration feeding mechanism (4), and the lower end is connected to the sealing cover (285), the sealing cover (285) and the telescopic tube (286) are connected at the connection point, and the sealing cover (285) is used to seal the material tank mouth when loading; The material blocking mechanism assembly (29) comprises a rotating cylinder (291), a material blocking plate (292), a connecting shaft (293), a guide sleeve (294), and a second cylinder (295); the material blocking plate (292) is used to block the outlet of the long vibration feeding mechanism (4); the material blocking plate (292) is connected to the connecting shaft (293); the rotating cylinder (291) is used to drive the material blocking plate (292) to rotate; the guide sleeve (294) is used for linear guidance of the connecting shaft (293); and the second cylinder (295) is used to drive the material blocking plate (292) to move up and down.

10. A working method of the automatic composite screening and weighing device for fine ammonium perchlorate according to claim 9, characterized in that: The following steps are involved: First, the pouring mechanism (1) is lifted to lift the barrel (11) to a predetermined height. The rotating motion component (9) is connected to the inlet of the short vibration feeding mechanism (2) by continuously adjusting the angle of the barrel (11). The ammonium perchlorate is poured into the feeder bin (13) of the short vibration feeding mechanism (2). The outlet of the short vibration feeding mechanism (2) is connected to the inlet of the screening mechanism (3) through an antistatic soft cloth. When the ammonium perchlorate is transported to the screening bin (16) of the screening mechanism (3), the rotating component (19) on the screening mechanism (3) drives the rake plate (18) to rotate and squeeze the ammonium perchlorate at different speeds. The squeezed ammonium perchlorate is screened through the screen (17). After the screening is completed, the ammonium perchlorate powder enters the feeding bin (25) of the long vibration feeding mechanism (4) and is sent to the feeding bin after vibration feeding. At the outlet of the silo (25), when it is about to reach the outlet, the blocking plate (292) of the blocking mechanism assembly (29) is moved away from below the outlet of the feeding silo (25), and the first cylinder (281) of the discharging mechanism assembly (28) drives the sealing cover (285) to move downward to the inlet of the material tank, and at the same time, the telescopic tube (286) also moves downward synchronously, so that the outlet of the long vibrating feeding mechanism (4) is docked with the inlet of the material tank, and the ammonium perchlorate powder enters the material tank from the outlet of the feeding silo (25) through the telescopic tube (286). When the weight of the material tank reaches the set value, the long vibrating feeding mechanism (4) slows down the feeding until it stops. At this time, the discharging mechanism assembly (28) lifts the sealing cover (285), and at the same time, the blocking plate (292) of the blocking mechanism assembly (29) blocks the outlet of the telescopic tube (286) to transfer the material tank away.

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