Powder pneumatic conveying multi-layer inspection flat screen device

Abstract

The invention relates to a powder pneumatic conveying multi-layer inspection flat screen device. The powder pneumatic conveying multi-layer inspection flat screen device comprises a support, a multi-layer screen cage, a driving mechanism, a jacking mechanism and a rapid fixing mechanism. The multi-layer screen cage mechanism comprises a top cover, a material blocking screen cage, an air baffle, a filter screen cage, a flow guide plate and a material collecting seat assembly, the top cover assembly comprises a top cover body, a top cover lug and a feeding pipe, the material blocking screen cage assembly comprises a material blocking screen cage ring shell and a material blocking screen, and the air baffle assembly comprises an air baffle ring shell and an air baffle. The filter screen cage assembly comprises a filter screen cage ring shell and a filter screen, the flow guide plate assembly comprises a flow guide plate ring shell and a flow guide plate, and the material collecting seat assembly comprises a material collecting seat body, a material collecting seat lug, a partition plate, a pure material connector and an impurity connector. The filtering length is increased through a reciprocating bent path, so that materials with very small aperture of a filtering screen on the filtering screen cage assembly can be screened cleanly, the impact force on the filtering screen is small, the filtering screen is not easy to damage, and the screening rate is high.

Description

Technical Field

[0001] This invention belongs to the technical field of powder pneumatic conveying devices, and specifically discloses a multi-layer inspection flat screen device for powder pneumatic conveying. Background Technology

[0002] During the pneumatic conveying of powder materials, impurities (woven bags, paper scraps, large clumps, insect pests, metal objects, etc.) are often present in the powder. This can lead to the malfunction of subsequent equipment and contamination of the finished product, such as blocked pipes, jammed equipment transmission, powder not reaching the required particle size, and insect pests in the finished powder product. Therefore, it is necessary to screen the powder during the conveying process.

[0003] Commonly used methods: 1. Add a pipe screen to the pneumatic conveying pipeline. When the material passes through the pipe screen, impurities are intercepted. Because the pipe screen has a small filtration area, the screen aperture cannot be too small, otherwise it will easily become clogged. It can only be used as a primary filter. When there are many impurities, the screen needs to be cleaned frequently.

[0004] 2. Using centrifugal force, the powder airflow flows tangentially through the screen. Fine powder passes through the screen under the action of centrifugal force, while impurities fall and are discharged due to gravity. However, this method will carry some fine powder with the impurities, resulting in a low screening rate. It is suitable for occasions where the screening rate requirement is not high.

[0005] 3. Online vibrating screen: The motor drives the high-speed rotating screen or scraper, which in turn causes the material to move centrifugally. Fine powder passes through the screen, while impurities are discharged from the outlet under the thrust of the spiral blades or scraper. However, this method requires a high-power motor due to the high-speed rotation, which is not energy-efficient. The screen aperture cannot be made too small, otherwise it will easily become clogged. If the screen aperture is too large, some small impurities or insect eggs cannot be intercepted. Furthermore, due to the high-speed rotation, impurities such as woven bags and paper scraps may be crushed and pass through the screen. Metallic impurities may also damage the screen and scraper, resulting in a high failure rate and difficult maintenance. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a multi-layer inspection flat screen device for pneumatic conveying of powder.

[0007] According to the technical solution provided by the present invention, the powder pneumatic conveying multi-layer inspection flat screen device includes a support, a multi-layer screen cage mechanism, a drive mechanism, a lifting mechanism and a quick fixing mechanism; the multi-layer screen cage mechanism and the drive mechanism are installed on the support, and the drive mechanism can drive the multi-layer screen cage mechanism to perform a swinging screen action. The multi-layer screen cage mechanism includes a top cover assembly, a material-blocking screen cage assembly, an air baffle assembly, a filter screen cage assembly, a guide plate assembly, and a material collection seat assembly; a material-blocking screen cage assembly is provided below the top cover assembly, an air baffle assembly is provided below the material-blocking screen cage assembly, at least two filter screen cage assemblies are provided below the air baffle assembly, a guide plate assembly is provided between two adjacent filter screen cage assemblies, and a material collection seat assembly is provided below the lowest filter screen cage assembly. The top cover assembly includes a top cover body, top cover ears, and a feed pipe. Top cover ears are provided on both sides of the outer wall of the top cover body in the diameter direction, and a feed pipe is provided at the center of the top cover body, with the upper end of the feed pipe protruding from the top cover body. The material-blocking screen cage assembly includes a material-blocking screen cage ring shell and a material-blocking screen. The front end and rear end of the material-blocking screen are connected to the inner wall of the material-blocking screen cage ring shell. Gas channels for the material-blocking screen cage are formed between the left side wall of the material-blocking screen and the inner wall of the material-blocking screen cage ring shell, and between the right side wall of the material-blocking screen and the inner wall of the material-blocking screen cage ring shell. A feed pipe through hole is provided at the center of the material-blocking screen. The air baffle assembly includes an air baffle ring shell and an air baffle. The middle part of the air baffle is a material blocking part, and guide discharge holes are evenly distributed on the outer periphery of the material blocking part. The front end and rear end of the air baffle are connected to the inner wall of the air baffle ring shell. An air baffle gas channel is formed between the left side wall of the air baffle and the inner wall of the air baffle ring shell, and between the right side wall of the air baffle and the inner wall of the air baffle ring shell. An air baffle pre-screen material channel is formed between the front side wall of the air baffle and the inner wall of the air baffle ring shell. The filter cage assembly includes a filter cage ring shell and a filter screen. The front and rear ends of the filter screen are connected to the inner wall of the filter cage ring shell. Gas channels are formed between the left side wall of the filter screen and the inner wall of the filter cage ring shell, and between the right side wall of the filter screen and the inner wall of the filter cage ring shell. A material channel is formed between the front or rear side wall of the filter screen and the inner wall of the filter cage ring shell. The guide plate assembly includes a guide plate ring shell and a guide plate. The front end and rear end of the guide plate are connected to the inner wall of the guide plate ring shell. The guide plate is a plate with a high center and low left and right sides. A guide plate gas channel is formed between the left side wall of the guide plate and the inner wall of the guide plate ring shell, and between the right side wall of the guide plate and the inner wall of the guide plate ring shell. A guide plate pre-screen material channel is formed between the front or rear side wall of the guide plate and the inner wall of the guide plate ring shell. The material collection seat assembly includes a material collection seat body, material collection seat ears, a partition, a pure material interface and an impurity interface. Material collection seat ears are provided on both sides of the outer wall of the material collection seat body in the diameter direction. A partition is provided inside the material collection seat body, which divides the internal space of the material collection seat body into a pure chamber and an impurity chamber. A pure material interface is provided at the bottom of the material collection seat body at the position corresponding to the pure chamber, and an impurity interface is provided at the bottom of the material collection seat body at the position corresponding to the impurity chamber. The lower end of the feed pipe passes through the feed pipe through hole of the baffle screen and is close to the baffle part of the air baffle. In the height direction of the multi-layer screen cage mechanism, the gas channel of the material blocking screen cage assembly, the gas channel of the air baffle assembly, the gas channel of the filter screen cage assembly, the gas channel of the guide plate assembly, and the gas channel of the guide plate assembly are aligned with the pure chamber on the material collection seat assembly. In the height direction of the multi-layer screen cage mechanism, the air baffle pre-screen material channel on the air baffle assembly and the filter cage pre-screen material channel on the filter cage assembly adjacent to the air baffle assembly are staggered. The filter cage pre-screen material channel on the filter cage assembly and the guide plate pre-screen material channel on the guide plate assembly located below and adjacent to the filter cage assembly are aligned. The filter cage pre-screen material channels on adjacent filter cage assemblies are staggered. The filter cage pre-screen material channel on the lowest filter cage assembly is aligned with the impurity chamber on the collection seat assembly. A lifting mechanism capable of lifting the top cover assembly is installed on the material collection seat ear and the top cover ear. A quick fixing mechanism capable of sealing and assembling the top cover assembly, the material blocking screen cage assembly, the air baffle assembly, the filter screen cage assembly, the guide plate assembly and the material collection seat assembly together is installed on the material collection seat body and the top cover body.

[0008] Preferably, the drive mechanism includes a drive motor, a transmission main shaft, an eccentric block, a guide rod, a crank, and a rocker arm. A drive motor is fixed on each side of the bracket and a transmission main shaft is installed thereon. The multi-layer sieve cage mechanism is supported on the two transmission main shafts. The drive motor drives the corresponding transmission main shaft. An eccentric block is fixed on each transmission main shaft. A guide rod is fixed at the upper end of the transmission main shaft. The guide rod is eccentrically set with respect to the transmission main shaft. A guide rod through hole is opened on the top cover ear. A seated bearing is fixed on the top cover ear outside the guide rod through hole. The guide rod is installed in the seated bearing. A drive shaft through hole is provided on the material collection seat ear. A seated bearing is fixed on the material collection seat ear outside the drive shaft through hole. The lower end of the drive shaft extends downward out of the seated bearing. A crank is fixed at the lower end of the drive shaft. A pin is installed at the other end of the crank. A rocker arm is provided below the main body of the aggregate holder, and pin seats are fixed at both ends of the rocker arm, with the pins installed in the pin seats.

[0009] Preferably, the lifting mechanism includes a cylinder seat and a lifting cylinder. A cylinder seat is provided on each of the material collection lugs, and a lifting cylinder is provided on the cylinder seat. The piston rod of the lifting cylinder is arranged vertically upward and fixed to the top cover lug.

[0010] Preferably, the quick-fixing mechanism includes a top cover pull rod seat, a material collection seat pull rod seat, a pull rod and a pull rod nut. The top cover pull rod seat is disposed on the outer wall of the top cover body, the material collection seat pull rod seat is disposed on the outer wall of the material collection seat body, the tail of the pull rod is provided with a threaded section, the head of the pull rod is installed in the top cover pull rod seat, and the tail of the pull rod passes through the material collection seat pull rod seat and the pull rod nut is sleeved on the threaded section of the pull rod.

[0011] This invention increases the filtration length through a reciprocating curved path, so that the aperture of the filter screen on the filter cage assembly can be made very small, and the material can be screened cleanly without clogging. It also reduces the impact force on the filter screen, making it less likely to be damaged. The screening rate is high, and it will not crush impurities and mix them with the material to cause contamination. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0013] Figure 2 This is a cross-sectional view of the multi-layer screen cage mechanism in this invention.

[0014] Figure 3 This is an exploded view of the multi-layer screen cage mechanism in this invention.

[0015] Figure 4 This is a schematic diagram of the drive mechanism in this invention.

[0016] Figure 5 This is a schematic diagram of the top cover assembly in this invention.

[0017] Figure 6 This is a schematic diagram of the material-blocking screen cage assembly in this invention.

[0018] Figure 7 This is a schematic diagram of the air baffle assembly in this invention.

[0019] Figure 8 This is a schematic diagram of the structure of the filter screen assembly in this invention.

[0020] Figure 9 This is a schematic diagram of the air deflector assembly in this invention.

[0021] Figure 10 This is a schematic diagram of the material collection seat assembly in this invention. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Due to the angle of the drawing, some parts may not be drawn, but their positions and connections can be understood from the text descriptions.

[0024] A multi-layer inspection flat sieve for pneumatic conveying of powder, such as Figures 1-10 As shown, it includes a support 1, a multi-layer screen cage mechanism 2, a drive mechanism 3, a lifting mechanism 4, and a quick fixing mechanism 5; the multi-layer screen cage mechanism 2 and the drive mechanism 3 are installed on the support 1, and the drive mechanism 3 can drive the multi-layer screen cage mechanism 2 to perform a swinging screen action. The multi-layer screen cage mechanism 2 includes a top cover assembly 2.1, a baffle screen cage assembly 2.2, an air baffle assembly 2.3, a filter screen cage assembly 2.4, a guide plate assembly 2.5, and a collection seat assembly 2.6. The baffle screen cage assembly 2.2 is located below the top cover assembly 2.1, the air baffle assembly 2.3 is located below the baffle screen cage assembly 2.2, and at least two filter screen cage assemblies 2.4 are located below the air baffle assembly 2.3. In an embodiment of the present invention, four filter screen cage assemblies 2.4 are located below the air baffle assembly 2.3, a guide plate assembly 2.5 is located between two adjacent filter screen cage assemblies 2.4, and a collection seat assembly 2.6 is located below the lowest filter screen cage assembly 2.4. The top cover assembly 2.1 includes a top cover body 2.11, top cover ears 2.12 and a feed pipe 2.13. Top cover ears 2.12 are provided on both sides of the outer wall diameter of the top cover body 2.11, and a feed pipe 2.13 is provided at the center of the top cover body 2.11. The upper end of the feed pipe 2.13 protrudes from the top cover body 2.11. The material-blocking screen cage assembly 2.2 includes a material-blocking screen cage ring shell 2.21 and a material-blocking screen 2.22. The front end and rear end of the material-blocking screen 2.22 are connected to the inner wall of the material-blocking screen cage ring shell 2.21. Gas channels for the material-blocking screen cage are formed between the left side wall of the material-blocking screen 2.22 and the inner wall of the material-blocking screen cage ring shell 2.21, and between the right side wall of the material-blocking screen 2.22 and the inner wall of the material-blocking screen cage ring shell 2.21. A feed pipe through hole is provided at the center of the material-blocking screen 2.22. The air baffle assembly 2.3 includes an air baffle ring shell 2.31 and an air baffle 2.32. The middle part of the air baffle 2.32 is a material blocking part, and guide discharge holes are evenly distributed on the outer periphery of the material blocking part. The front end and rear end of the air baffle 2.32 are connected to the inner wall of the air baffle ring shell 2.31. An air baffle gas channel is formed between the left side wall of the air baffle 2.32 and the inner wall of the air baffle ring shell 2.31, and between the right side wall of the air baffle 2.32 and the inner wall of the air baffle ring shell 2.31. An air baffle pre-screen material channel is formed between the front side wall of the air baffle 2.32 and the inner wall of the air baffle ring shell 2.31. The filter cage assembly 2.4 includes a filter cage ring shell 2.41 and a filter screen 2.42. The front end and rear end of the filter screen 2.42 are connected to the inner wall of the filter cage ring shell 2.41. Gas channels for the filter cage are formed between the left side wall of the filter screen 2.42 and the inner wall of the filter cage ring shell 2.41, and between the right side wall of the filter screen 2.42 and the inner wall of the filter cage ring shell 2.41. A material channel for the filter cage is formed between the front or rear side wall of the filter screen 2.42 and the inner wall of the filter cage ring shell 2.41. The guide plate assembly 2.5 includes a guide plate ring shell 2.51 and a guide plate 2.52. The front end and rear end of the guide plate 2.52 are connected to the inner wall of the guide plate ring shell 2.51. The guide plate 2.52 is a plate with a high center and low left and right sides. A guide plate gas channel is formed between the left side wall of the guide plate 2.52 and the inner wall of the guide plate ring shell 2.51, and between the right side wall of the guide plate 2.52 and the inner wall of the guide plate ring shell 2.51. A guide plate pre-screen material channel is formed between the front or rear side wall of the guide plate 2.52 and the inner wall of the guide plate ring shell 2.51. The material collection seat assembly 2.6 includes a material collection seat body 2.61, material collection seat ears 2.62, a partition 2.63, a pure material interface 2.64, and an impurity interface 2.65. The material collection seat ears 2.62 are provided on both sides of the outer wall diameter of the material collection seat body 2.61. The partition 2.63 is provided inside the material collection seat body 2.61, which divides the internal space of the material collection seat body 2.61 into a pure chamber and an impurity chamber. The pure material interface 2.64 is provided at the bottom of the material collection seat body 2.61 at the position corresponding to the pure chamber, and the impurity interface 2.65 is provided at the bottom of the material collection seat body 2.61 at the position corresponding to the impurity chamber. The lower end of the feed pipe 2.13 passes through the feed pipe through hole of the baffle screen 2.22 and is close to the baffle part of the air baffle 2.32; In the height direction of the multi-layer screen cage mechanism 2, the gas channel of the material blocking screen cage assembly 2.2, the gas channel of the air baffle assembly 2.3, the gas channel of the filter screen cage assembly 2.4, the gas channel of the guide plate assembly 2.5, and the pure chamber on the material collecting seat assembly 2.6 are aligned. In the height direction of the multi-layer screen cage mechanism 2, the air baffle pre-screen material channel on the air baffle assembly 2.3 and the filter cage pre-screen material channel on the filter cage assembly 2.4 adjacent to the air baffle assembly 2.3 are staggered. The filter cage pre-screen material channel on the filter cage assembly 2.4 and the guide plate pre-screen material channel on the guide plate assembly 2.5 located below and adjacent to the filter cage assembly 2.4 are aligned. The filter cage pre-screen material channels on adjacent filter cage assemblies 2.4 are staggered. The filter cage pre-screen material channel on the lowest filter cage assembly 2.4 is aligned with the impurity chamber on the collection seat assembly 2.6. A lifting mechanism 4 capable of lifting the top cover assembly 2.1 is installed on the material collection seat ear 2.62 and the top cover ear 2.12. A quick fixing mechanism 5 capable of sealing and assembling the top cover assembly 2.1, the material baffle cage assembly 2.2, the air baffle assembly 2.3, the filter cage assembly 2.4, the guide plate assembly 2.5, and the material collection seat assembly 2.6 together is installed on the material collection seat body 2.61 and the top cover body 2.11.

[0025] The drive mechanism 3 includes a drive motor 3.1, a transmission main shaft 3.2, an eccentric block 3.3, a guide rod 3.4, a crank 3.5, and a rocker arm 3.6. One drive motor 3.1 is fixed to each side of the bracket 1, and a transmission main shaft 3.2 is mounted on each side. Specifically, one upper and one lower vertical bearing with a mounting plate are fixed to each side of the bracket 1. The transmission main shaft 3.2 is installed inside the vertical bearing with a mounting plate, and a thrust bearing assembly is mounted on the transmission main shaft 3.2. The multi-layer screen cage mechanism 2 is supported on the two transmission main shafts 3.2. Specifically, the top cover lug 2... Both the top cover ear 2.12 and the collection seat ear 2.62 are supported by thrust bearing assemblies. The drive motor 3.1 drives the corresponding transmission main shaft 3.2 through the belt transmission assembly. An eccentric block 3.3 is fixed on each transmission main shaft 3.2. A guide rod 3.4 is fixed at the upper end of the transmission main shaft 3.2. The guide rod 3.4 is eccentrically set with the transmission main shaft 3.2. A guide rod through hole is opened on the top cover ear 2.12. A seated bearing (a square seated bearing can be used) is fixed on the top cover ear 2.12 outside the guide rod through hole. The guide rod 3.4 is installed in the seated bearing. A drive shaft through hole is provided on the material collection lug 2.62. A seated bearing (a square seated bearing can be used) is fixed on the material collection lug 2.62 outside the drive shaft through hole. The lower end of the drive shaft 3.2 extends downward out of the seated bearing. A crank 3.5 is fixed at the lower end of the drive shaft 3.2. A pin is installed at the other end of the crank 3.5. A rocker arm 3.6 is provided below the material collection base body 2.61, and pin seats are fixed at both ends of the rocker arm 3.6, with the pins installed in the pin seats.

[0026] The lifting mechanism 4 includes a cylinder seat 4.1 and a lifting cylinder 4.2. A cylinder seat 4.1 is provided on each of the material collection lugs 2.62, and a lifting cylinder 4.2 is provided on the cylinder seat 4.1. The piston rod of the lifting cylinder 4.2 is arranged vertically upward and fixed to the top cover lug 2.12.

[0027] The quick-fixing mechanism 5 includes a top cover pull rod seat 5.1, a material collection seat pull rod seat 5.2, a pull rod 5.3, and a pull rod nut 5.4. The top cover pull rod seat 5.1 is located on the outer wall of the top cover body 2.11, and the material collection seat pull rod seat 5.2 is located on the outer wall of the material collection seat body 2.61. The tail of the pull rod 5.3 is provided with a threaded section, the head of the pull rod 5.3 is installed in the top cover pull rod seat 5.1, and the tail of the pull rod 5.3 passes through the material collection seat pull rod seat 5.2 and the pull rod nut 5.4 is sleeved on the threaded section of the pull rod 5.3.

[0028] The drive motor 3.1 drives its respective transmission shaft 3.2 and the eccentric block 3.3 fixed on the transmission shaft 3.2 to rotate through the belt drive assembly. Due to the centrifugal motion, the multi-layer screen cage mechanism 2 vibrates under the action of centrifugal force, which helps the filter screen 2.42 on the filter screen cage assembly 2.4 to filter the powder material. The guide rod 3.4 rotates at a constant speed around the axis of the transmission shaft 3.2.

[0029] A drive shaft through hole is provided on the material collection seat ear 2.62. The lower end of the drive shaft 3.2 extends downward through the drive shaft through hole on the material collection seat ear 2.62. A crank 3.5 is fixed to the lower end of the drive shaft 3.2, and a pin is installed at the other end of the crank 3.5. A rocker arm 3.6 is provided below the material collection seat body 2.61. Pin seats are fixed at both ends of the rocker arm 3.6, and the pin is installed in the pin seat. The lower ends of the two drive shafts 3.2 move synchronously with the rocker arm 3.6 through the crank 3.5. Under the overall movement of the drive mechanism 3, the multi-layer screen cage mechanism 2 swings around the center, thereby realizing the action of the swing screen.

[0030] In operation, the material enters the feed pipe 2.13 through the flexible hose and encounters the baffle 2.32. A small portion of the material impacts the baffle screen 2.22 in the reverse direction and is filtered by the baffle screen 2.22. A small portion of the powder material passes through the baffle screen 2.22 and flows with the air. Most of the material before screening diffuses to the surrounding areas and falls into the next layer of screen through the material holes around the air baffle 2.22. Air tends to flow towards spaces with low resistance. The large internal space of the top cover body 2.11 and the through-passage on both sides allow the powder material and airflow to enter the internal space of the top cover body 2.11 with low resistance after passing through the baffle screen 2.22. The airflow, mixed with a small portion of the powder material, flows from the baffle screen cage gas channel on the baffle cage assembly 2.2, the air baffle gas channel on the air baffle assembly 2.3, the filter screen cage gas channel on the filter screen cage assembly 2.4, and the guide plate gas channel on the guide plate assembly 2.5 to the pure chamber on the collection seat assembly 2.6, thereby achieving the purpose of gas-solid separation.

[0031] Most of the powder material containing impurities before screening falls through the guide discharge hole on the air baffle 2.32 and lands on the filter screen 2.42 of the uppermost filter cage assembly 2.4. Under the action of the swing screen of the multi-layer filter cage mechanism 2, some powder material falls through the filter screen 2.42 onto the guide plate 2.52 of the guide plate assembly 2.5 and slides into the gas channel of the guide plate. It flows to the pure chamber on the collection seat assembly 2.6 through the airflow. The powder material containing impurities before screening falls through the filter cage material channel on the filter cage assembly 2.4 into the filter screen 2.42 of the next filter cage assembly 2.4. This process is repeated step by step in a serpentine filtration. After being filtered by multiple screens, only impurities remain. They enter the impurity chamber on the collection seat assembly 2.6 from the filter cage material channel on the lowermost filter cage assembly 2.4 and finally enter the impurity storage tank.

[0032] This invention increases the filtration length through a reciprocating curved path, so that the aperture of the filter screen 2.42 on the filter screen cage assembly 2.4 can be made very small, so that the material can be screened cleanly, and it is not easy to clog. The impact force on the filter screen 2.42 is small, and it is not easy to damage the filter screen 2.42. The screening rate is high, and it will not crush impurities and mix with the material to cause contamination.

[0033] In this invention, the four quick-fixing mechanisms 5 can be quickly disassembled, and then the two lifting cylinders 4.2 lift the top cover assembly 2.1 to make room. The material blocking screen cage assembly 2.2 and the filter screen cage assembly 2.4 are independent of each other and can be quickly removed, which facilitates quick replacement and maintenance of the material blocking screen cage assembly 2.2 and the filter screen cage assembly 2.4.

[0034] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A multi-layer inspection flat sieve device for pneumatic conveying of powder, characterized in that: It includes support (1), multilayer screen cage mechanism (2), drive mechanism (3), jacking mechanism (4) and quick fixing mechanism (5); Multilayer screen cage mechanism (2) and drive mechanism (3) are installed on support (1), drive mechanism (3) can drive multilayer screen cage mechanism (2) to do the action of swing screen; The multilayer screen cage mechanism (2) includes top cover assembly (2.1), material blocking screen cage assembly (2.2), air baffle assembly (2.3), filtering screen cage assembly (2.4), guide plate assembly (2.5) and material collecting seat assembly (2.6); Material blocking screen cage assembly (2.2) is provided below top cover assembly (2.1), air baffle assembly (2.3) is provided below material blocking screen cage assembly (2.2), at least two filtering screen cage assemblies (2.4) are provided below air baffle assembly (2.3), a guide plate assembly (2.5) is provided between adjacent two filtering screen cage assemblies (2.4), and material collecting seat assembly (2.6) is provided below the lowermost filtering screen cage assembly (2.4); The top cover assembly (2.1) includes a top cover body (2.11), a top cover ear (2.12) and a feed pipe (2.13), the top cover ear (2.12) is arranged on the two sides of the outer wall of the top cover body (2.11) in the diameter direction, and the feed pipe (2.13) is arranged at the center position of the top cover body (2.11), and the upper end of the feed pipe (2.13) is exposed from the top cover body (2.11); The material blocking screen cage assembly (2.2) includes a material blocking screen cage ring shell (2.21) and a material blocking screen (2.22), the front end and the rear end of the material blocking screen (2.22) are connected with the inner wall of the material blocking screen cage ring shell (2.21), the left side wall of the material blocking screen (2.22) and the inner wall of the material blocking screen cage ring shell (2.21) and the right side wall of the material blocking screen (2.22) and the inner wall of the material blocking screen cage ring shell (2.21) form a material blocking screen cage gas passage, and a feed pipe through hole is arranged at the center position of the material blocking screen (2.22); The air baffle assembly (2.3) includes an air baffle ring shell (2.31) and an air baffle (2.32), the middle part of the air baffle (2.32) is a material blocking part, the material blocking part is uniformly distributed with guide and discharge holes, the front end and the rear end of the air baffle (2.32) are connected with the inner wall of the air baffle ring shell (2.31), the left side wall of the air baffle (2.32) and the inner wall of the air baffle ring shell (2.31) and the right side wall of the air baffle (2.32) and the inner wall of the air baffle ring shell (2.31) form an air baffle gas passage, and the front side wall of the air baffle (2.32) and the inner wall of the air baffle ring shell (2.31) form an air baffle screen front material passage; The filter screen cage assembly (2.4) comprises a filter screen cage ring shell (2.41) and a filter screen (2.42), the front end and the rear end of the filter screen (2.42) are connected with the inner wall of the filter screen cage ring shell (2.41), the left side wall and the right side wall of the filter screen (2.42) and the inner wall of the filter screen cage ring shell (2.41) form filter screen cage gas channels, and the front side wall or the rear side wall of the filter screen (2.42) and the inner wall of the filter screen cage ring shell (2.41) form a filter screen cage pre-screen material channel; The guide plate assembly (2.5) comprises a guide plate ring shell (2.51) and a guide plate (2.52), the front end and the rear end of the guide plate (2.52) are connected with the inner wall of the guide plate ring shell (2.51), the guide plate (2.52) is a plate body with a high middle and low left and right sides, the left side wall and the right side wall of the guide plate (2.52) and the inner wall of the guide plate ring shell (2.51) form guide plate gas channels, and the front side wall or the rear side wall of the guide plate (2.52) and the inner wall of the guide plate ring shell (2.51) form a guide plate pre-screen material channel; The material collecting seat assembly (2.6) comprises a material collecting seat body (2.61), a material collecting seat ear (2.62), a partition plate (2.63), a pure material interface (2.64) and an impurity interface (2.65), the material collecting seat ear (2.62) is arranged on the outer wall of the material collecting seat body (2.61) in the diameter direction of the material collecting seat body (2.61), the partition plate (2.63) is arranged in the material collecting seat body (2.61), the partition plate (2.63) divides the internal space of the material collecting seat body (2.61) into a pure chamber and an impurity chamber, the pure material interface (2.64) is arranged at the bottom of the material collecting seat body (2.61) at the position corresponding to the pure chamber, and the impurity interface (2.65) is arranged at the bottom of the material collecting seat body (2.61) at the position corresponding to the impurity chamber; The lower end of the feeding pipe (2.13) penetrates the feeding pipe through hole of the material blocking screen (2.22) and is close to the material blocking part of the air baffle (2.32); In the height direction of the multi-layer screen cage mechanism (2), the material blocking screen cage gas channel of the material blocking screen cage assembly (2.2), the air baffle gas channel of the air baffle assembly (2.3), the filter screen cage gas channel of the filter screen cage assembly (2.4), the guide plate gas channel of the guide plate assembly (2.5) and the pure chamber of the material collecting seat assembly (2.6) are arranged in alignment. ​ In the height direction of the multi-layer screen cage mechanism (2), the air baffle screen front material channel on the air baffle assembly (2.3) and the filter screen cage screen front material channel on the filter screen cage assembly (2.4) adjacent to the air baffle assembly (2.3) are arranged in a staggered manner, the filter screen cage screen front material channel on the filter screen cage assembly (2.4) and the guide plate screen front material channel on the guide plate assembly (2.5) located below the filter screen cage assembly (2.4) are arranged in alignment, the filter screen cage screen front material channels on the adjacent filter screen cage assemblies (2.4) are arranged in a staggered manner, and the filter screen cage screen front material channel on the lowermost filter screen cage assembly (2.4) is arranged in alignment with the impurity chamber on the aggregate seat assembly (2.6); A jacking mechanism (4) capable of jacking up the top cover assembly (2.1) is installed on the aggregate seat ear (2.62) and the top cover ear (2.12), and a quick fixing mechanism (5) capable of sealingly assembling the top cover assembly (2.1), the material blocking screen cage assembly (2.2), the air baffle assembly (2.3), the filter screen cage assembly (2.4), the guide plate assembly (2.5), and the aggregate seat assembly (2.6) together is installed on the aggregate seat body (2.61) and the top cover body (2.11).

2. The powder pneumatic conveying multi-layer inspection flat screen apparatus according to claim 1, characterized in that: The driving mechanism (3) comprises a driving motor (3.1), a transmission main shaft (3.2), an eccentric block (3.3), a guide rod (3.4), a crank (3.5), and a rocker (3.6). One driving motor (3.1) and one transmission main shaft (3.2) are fixed on each side of the support (1). The multi-layer screen cage mechanism (2) is supported on the two transmission main shafts (3.2). The driving motor (3.1) drives the corresponding transmission main shaft (3.2). The eccentric block (3.3) is fixed on each transmission main shaft (3.2). The guide rod (3.4) is fixed on the upper end of the transmission main shaft (3.2). The guide rod (3.4) is eccentrically arranged with the transmission main shaft (3.2). A guide rod through hole is formed in the top cover ear (2.12). A bearing with seat is fixed on the outside of the top cover ear (2.12). The guide rod (3.4) is installed in the bearing with seat; A transmission main shaft through hole is formed in the aggregate seat ear (2.62). A bearing with seat is fixed on the outside of the aggregate seat ear (2.62). The lower end of the transmission main shaft (3.2) extends out of the bearing with seat. The crank (3.5) is fixed on the lower end of the transmission main shaft (3.2). A pin shaft is installed on the other end of the crank (3.5). A rocker (3.6) is arranged below the aggregate seat body (2.61). Pin shaft seats are fixed on both ends of the rocker (3.6). The pin shaft is installed in the pin shaft seat.

3. The powder pneumatic conveying multi-layer inspection flat screen apparatus according to claim 1, wherein: The jacking mechanism (4) comprises a cylinder seat (4.1) and a jacking cylinder (4.2). A cylinder seat (4.1) is arranged on each aggregate seat ear (2.62). A jacking cylinder (4.2) is arranged on the cylinder seat (4.1). The piston rod of the jacking cylinder (4.2) is vertically upwardly arranged and fixed with the top cover ear (2.12).

4. The powder pneumatically conveyed multi-layer inspection flat screen apparatus of claim 1, wherein: The quick fixing mechanism (5) comprises a top cover pull rod seat (5.1), a aggregate seat pull rod seat (5.2), a pull rod (5.3) and a pull rod nut (5.4), the top cover pull rod seat (5.1) is arranged on the outer wall of the top cover body (2.11), the aggregate seat pull rod seat (5.2) is arranged on the outer wall of the aggregate seat body (2.61), the tail of the pull rod (5.3) is provided with a threaded section, the head of the pull rod (5.3) is installed in the top cover pull rod seat (5.1), and the tail of the pull rod (5.3) is provided with a threaded section, the head of the pull rod (5.3) is installed in the top cover pull rod seat (5.1), and the tail of the pull rod (5.3) is provided with a threaded section, the head of the pull rod (5.3) is installed in the top cover pull rod seat (5.1), and the tail of the pull rod (5.3) is provided with a threaded section, the head of the pull rod (5.3) is installed in the top cover pull rod seat (5.1), and the tail of the pull rod (5.3) is provided with a threaded section, the head of the pull rod (5.3) is installed in the top cover pull rod seat (5.1), and the tail of the pull rod (5.3) is provided with a threaded section, the head of the pull rod (5.3) is installed in the top cover pull rod seat (5.1), and the tail of the pull rod (5.3) is provided with a threaded section, the head of the pull rod (5

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