WO2021103445A1 - Production system for wax micro powder with set particle size - Google Patents

Abstract

Disclosed is a production system for a wax micro powder with a set particle size, the production system comprising a screening device (20), a driving electric motor (10) and an air induction device, wherein the screening device (20) comprises a shell (50) and a screen (60) rotatably arranged in the shell (50), the screen (60) is provided with an inner cavity (600), an output shaft of the driving electric motor (10) is connected to the screen (60) and used for driving the screen (60) to rotate, a separation cavity (200) is formed between the screen (60) and the shell (50), a feeding port (53) is provided in the shell (50), the feeding port (53) is in communication with the separation cavity (200), a coarse material outlet (54) is provided in the bottom of the shell (50), the coarse material outlet (54) is in communication with the separation cavity (200), the air induction device comprises an induced draft fan (40) and a cyclone separator (30), an inlet of the induced draft fan (40) is in communication with an exhaust pipe (35) of the cyclone separator (30), and a conical pipe (32) at the lower end of the cyclone separator (30) forms a discharging port. By means of the wax micro powder production system, a wax micro powder within a set particle size range can be smoothly separated out.

Description

A production system of wax micropowder with set particle size Technical field

The invention relates to a production system for wax micropowder with a set particle size.

Background technique

Wax micropowder refers to the processing of wax raw materials to a particle size of 100nm-100μm. After fine powdering, the surface molecular arrangement, electronic distribution structure and crystal structure will change, and there are peculiar surface effects and small size effects. , And more importantly, the ultrafine powder has a series of physical, chemical, surface and interface properties compared with conventional materials. After wax is micronized, it has excellent scratch resistance, abrasion resistance, stability, anti-sticking and other physical and chemical properties. It is widely used in leather, ink, coating, 3D printing, electronic capacitors, solar battery backsheets, lithium battery separators, etc. field.

In the actual application of wax powder, wax powder of a specific size is often required, such as 40-50 μm wax powder. The most commonly used, such as sand-grain wax, is added to the coating to make the coating show the sand-grain effect. It has very strict requirements on the particle size. It cannot have a large particle size that exceeds the size, and there can be no small particle powder. This kind of powder with special requirements is often difficult to achieve with conventional production equipment, because with the production of wax, the sieve holes used to filter the wax will become smaller as the wax powder adheres, thus making the sieve smaller. The particles under the sieve are getting finer and finer. Vibration or beating not only reduces the production efficiency, but also affects the use of the machine, and the effect is very limited.

Summary of the invention

In order to solve the above problems, the present invention proposes a wax micropowder production system. The wax micropowder production system can smoothly separate the wax micropowder within the set particle size range. The specific technical solutions are as follows:

A production system for wax micropowder with a set particle size, which comprises a screening device, a drive motor and an air-inducing device. The screening device includes a casing and a screen rotatably built in the casing. The screen has an inner cavity , The output shaft of the drive motor is connected to the screen for driving the screen to rotate; a separation cavity is formed between the screen and the housing, and a feed port is provided on the housing, and the feed port communicates with the separation Cavity; A coarse material outlet is provided at the bottom of the shell, and the coarse material outlet communicates with the separation cavity;

The air induction device includes an induced draft fan and a cyclone separator. The cyclone separator has a vertical tube extending in a vertical direction with a closed top. An exhaust pipe is arranged in the vertical tube, and the exhaust pipe extends upward and out of the vertical tube. A powder outlet is formed after the vertical cylinder; a powder inlet pipe is installed along the tangential direction on the upper part of the vertical cylinder, and the powder inlet pipe communicates with the annular cavity between the vertical pipe and the exhaust pipe;

A downwardly extending conical tube is provided at the lower end of the vertical cylinder, the powder inlet tube is connected to the inner cavity of the screen, and the exhaust pipe is connected to the air inlet of the induced draft fan; the lower end of the conical tube is formed as a discharge port.

When this application is working, two sets of production systems can be set up, where the screen of the first set of production system has a first set mesh, the screen of the second set of production system has a second set mesh, and the second set of The fixed mesh number is less than the first set mesh number, and then the wax micropowder is first sent to the first set of production system. Under the action of the induced draft fan, the primary material is separated, and the primary material is separated from the discharge port of the cyclone. Discharge, the particles larger than the first set mesh in the primary material have been separated. Then the primary selected material is sent to the second set of production system. In the second set of production system, the particles smaller than the second set mesh in the primary selected material are sucked away by the induced draft fan and passed through the cyclone separator. The discharge port is discharged, and the material discharged from the coarse material outlet of the second production system becomes wax fine powder with a particle size between the first set mesh and the second set mesh.

Of course, during production, the wax powder can also be passed through the second set of production system. The particles smaller than the second set mesh are first taken out, and the material discharged from the coarse material outlet becomes the primary material, and then the primary material The selected material passes through the first set of production system, and the material discharged from the discharge port of the cyclone separator is wax powder with a particle size between the first set mesh and the second set mesh.

Of course, it is also possible to use the same production system and replace screens of different meshes to complete the separation of particles of different particle sizes in the wax micropowder.

The application can smoothly produce wax micropowder with a set particle size range.

Specifically, the housing of the screening device includes a first end plate, a second end plate, and an intermediate plate part arranged between the first end plate and the second end plate, which extend in the vertical direction and are arranged in parallel. The one end plate and the second end plate are spaced apart along the extension direction of a reference axis, the reference axis extends in the horizontal direction; the opposite ends of the middle plate portion are fixedly mounted on the first end plate and the second end plate, respectively;

The screen includes a circular filter screen, and a first connecting plate and a second connecting plate fixedly connected to the two ends of the filter screen in the axial direction. The center axis of the filter screen is parallel to the reference axis, and the center axis of the filter screen is parallel to the reference axis. A short shaft extending in the direction of the reference axis is fixedly installed on the connecting plate, and a hollow shaft extending in the direction of the reference axis is fixedly installed on the second connecting plate; the short shaft is rotatably supported on the first end plate and extends out of the The first end plate is connected to the drive motor; the hollow shaft is rotatably supported on the second end plate and extends out of the second end plate to communicate with the powder inlet pipe of the cyclone separator, and the hollow shaft communicates with the inner cavity of the screen .

This design can form the separation cavity between the screen and the shell into an annular shape. After the wax powder enters the separation cavity through the feed port, it rotates with the screen. When the wax powder particles adhered to the outside of the screen, it follows the screen. When it rotates to the bottom, it will fall off the screen under the action of gravity, which reduces the amount of wax micropowder particles attached to the screen, thereby effectively prolonging the use time of the equipment.

Further, in order to enable the screen to rotate smoothly, a shaft end connecting assembly is provided on the outer side of the second end plate, and the shaft end connecting assembly includes a first sleeve fixed on the outer side of the second end plate and connected to The second sleeve on the first sleeve and the transition pipe connected to the second sleeve, the first sleeve, the second sleeve and the transition pipe are coaxially arranged and extend along the reference axis direction; the first sleeve , The second sleeve and the inner cavity of the transition pipe are jointly formed as a shaft hole, the hollow shaft is sealed into the shaft hole, the screen can rotate relative to the shaft end connection assembly; the transition pipe is fixedly connected with a discharge pipe, the outlet The feed pipe is connected to the powder inlet pipe of the cyclone separator. This design can make the screen rotate smoothly, and make the inner cavity of the screen communicate with the induced draft fan through the hollow shaft, so that the materials entering the screen can be discharged smoothly.

Further, in order to effectively seal the hollow shaft, a sealing ring is provided between the first sleeve and the hollow shaft, a lip seal ring is provided between the second sleeve and the hollow shaft, and the hollow shaft passes through the second bearing. It is rotatably supported in the transition pipe; a blowback pipe is installed on the second sleeve, and the blowback pipe penetrates the barrel wall of the second sleeve. The blowback pipe extends outward from the second sleeve and connects to the first compressed air device ; Along the reference axis direction, the blowback tube is closer to the second end plate relative to the lip seal ring.

Further, in order to make the wax powder on the outside of the screen smoothly detach from the screen, the screening device also includes a blow-off tube, one end of the blow-off tube is located in the inner cavity of the screen, and the other end of the blow-off tube passes through The inner cavity of the hollow shaft extends into the transition pipe, and then passes through the wall of the transition pipe to form a blow-off air inlet. The blow-off pipe is fixedly connected to the transition pipe and has no contact with the hollow shaft. The air port is connected to the second compressed air device; an end of the blow-off pipe located in the inner cavity of the screen is provided with an air jet hole.

Specifically, the blow-off pipe includes a porous pipe, a connecting elbow, an inner sleeve, and a fixed pipe that are sequentially connected. The porous pipe is located in the inner cavity of the screen, and the porous pipe is provided with jet holes facing downward. One end of the sleeve is connected to the porous tube through a connecting play tube, the other end of the inner sleeve passes through the inner cavity of the hollow shaft and then extends into the inner cavity of the transition tube. The fixed tube penetrates the wall of the transition tube. The fixed pipe is sealed and connected to the inner sleeve through a threaded short connection, and one end of the fixed pipe located on the outside of the transition pipe is formed as a blow-off air inlet.

Using the blow-off tube, compressed air can be continuously blown to the screen, so that the wax powder adhered to the screen is easier to fall off the screen, so as to effectively prolong the blocking time of the screen and improve the production efficiency.

Further, the hole diameter of the air injection hole is 1.5mm-3mm, and the blow-off tube is used to inject compressed air with a pressure of 0.1-0.8Mpa outward. Under this condition, the fine wax powder adhering to the screen can basically be blown off from the screen.

Specifically, the middle plate portion includes:

Half-circular arc plate, the semi-circular arc plate is in the shape of a semi-circular arc protruding upward, the two ends of the semi-circular arc plate in the circumferential direction face downward, and the semi-circular arc plate is located above the filter screen; the semi-circular arc plate The two ends of the plate are respectively formed as a first end and a second end, and the width direction of the semicircular arc plate extends along the extension direction of the reference axis;

An outer inlet vertical plate, the outer inlet vertical plate is formed by the first end portion extending downward in the vertical direction, the outer inlet vertical plate extends along the extension direction of the reference axis; the horizontal two ends of the outer inlet vertical plate Respectively connected to the first end plate and the second end;

An inner inlet vertical plate, the inner inlet vertical plate is parallel to the outer inlet vertical plate, and in the horizontal direction, the inner inlet vertical plate is located on the side of the outer inlet vertical plate facing the second end, the inner inlet vertical plate Extending along the extension direction of the reference axis; the two ends of the inner inlet vertical plate in the horizontal direction are respectively connected to the first end plate and the second end;

An inclined inlet plate, in the horizontal direction, the top of the inclined inlet plate is located on the side of the outer inlet vertical plate away from the second end, the inclined inlet plate extends along the extension direction of the reference axis, and the horizontal direction of the inclined inlet plate The two ends of the are respectively connected to the first end plate and the second end, and the distance between the inclined inlet plate and the inner inlet vertical plate gradually increases from bottom to top;

The inclined inlet plate and the inner inlet vertical plate form a feeding box, the feeding box has a feeding cavity; the inclined inlet plate and the outer inlet vertical plate form the feeding port, the feeding port faces upward, and Communicate with the feed cavity;

In the horizontal direction, the inner inlet vertical plate is located between the outer inlet vertical plate and the filter screen, and the top of the inner inlet vertical plate exceeds the bottom of the outer inlet vertical plate upwards and is lower than the central axis of the filter screen; the outer inlet vertical plate A feed channel extending in the up and down direction is formed between the vertical plate and the inner inlet, the feed channel communicates with the feed cavity downward; the feed channel communicates with the separation cavity upward along the rotation direction of the screen;

The middle plate part further includes:

A first discharging side plate, in the horizontal direction, the first discharging side plate is located on the side of the inner inlet vertical plate facing the second end; the top of the first discharging side plate is sealingly connected to the inner inlet vertical The two ends of the first discharge side plate in the horizontal direction are respectively connected to the first end plate and the second end;

A second discharging side plate, the second discharging side plate is formed by the second end portion extending obliquely downward, and the second discharging side plate extends obliquely in the direction of the first discharging side plate; the second outlet The two ends of the material side plate in the horizontal direction are respectively connected to the first end plate and the second end;

A coarse material discharging cavity is formed between the first discharging side plate and the second discharging side plate, and the coarse material outlet is formed at the bottom of the coarse material discharging cavity. Viewed in the vertical direction, the outer inlet vertical plate is located between the inclined inlet plate and the inner inlet vertical plate; preferably, the bottom of the outer inlet vertical plate is the same height as the top of the inclined inlet plate. So that the material entering the feeding box can smoothly enter the separation cavity through the feeding channel.

During production, the wax powder is first put into the feeding box, and the negative pressure generated by the induced draft fan is used to suck the wax powder in the feeding box into the separation chamber for separation, so as to avoid the feeding process due to the feeding amount. The fluctuation of the sieving device results in the fluctuation of the amount of wax micropowder entering the sieving device.

In order to facilitate the wax powder deposited in the feeding box, a waste outlet is arranged at the bottom of the feeding box, and a plug-in valve is installed on the waste outlet.

In order to enable the wax powder in the feeding box to enter the separation cavity in a dispersed state, a wind deflector is installed in the feeding channel, and the wind deflector is parallel to the inner inlet vertical plate.

Description of the drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Figure 2 is an elevation view of the screening device.

Fig. 3 is a view from the A-A direction in Fig. 2.

Detailed ways

1 to 3, a production system for wax powder with a set particle size includes a sieving device 20, a driving motor 10, and an air induction device. The sieving device 20 includes a housing 50 and is rotatably built in the housing 50 The inner screen 60 has an inner cavity 600, the output shaft of the drive motor 10 is connected to the reducer 12, and the output shaft of the reducer 12 is connected to the screen 60 for driving the screen to rotate.

A separation cavity 200 is formed between the screen 60 and the housing 50, and the housing 50 is provided with a feed port 53, and the feed port 50 communicates with the separation cavity 200. A coarse material outlet 54 is provided at the bottom of the shell.

The induced draft device includes an induced draft fan 40 and a cyclone separator 30.

The cyclone separator 30 has a vertical cylinder 31 extending in a vertical direction, and an exhaust pipe 35 is arranged in the vertical cylinder 31. The exhaust pipe 35 extends upwards through the vertical cylinder 31 to form a powder outlet 351. A powder inlet pipe 34 is installed on the upper part of the vertical cylinder 31 along the tangential direction, and the powder inlet pipe 34 communicates with the annular cavity between the vertical pipe and the exhaust pipe.

A tapered tube 32 extending downward is provided at the lower end of the vertical cylinder 31. The small end of the tapered tube 32 faces downward and is formed as a separation material outlet 33. The powder inlet pipe 34 is connected to the inner cavity 600 of the screen, the exhaust pipe 35 is connected to the air inlet 41 of the induced draft fan 40, and the outlet 42 of the induced draft fan is connected to a waste tank 45. The waste tank is used to temporarily store the wax powder sucked by the induced draft fan.

The sieving device will be described in detail below. The direction of the arrow M in FIG. 2 indicates the extending direction of the reference axis. The reference axis M extends in the horizontal direction.

The housing 50 of the screening device includes a first end plate 58 and a second end plate 59 that extend in the vertical direction and are arranged in parallel, and an intermediate plate portion connected between the first end plate 58 and the second end plate 59 51. The first end plate and the second end plate are spaced apart along the extension direction of the reference axis M, and opposite ends of the middle plate portion 51 are fixedly mounted on the first end plate and the second end plate, respectively.

The intermediate plate portion 51 includes a semi-circular arc plate 511 protruding upward. Both ends of the semi-circular arc plate in the circumferential direction face downward and are respectively formed as a first end 5111 and a second end 5112. The width direction of the circular arc plate 511 extends along the extension direction of the reference axis.

The first end 5111 extends downward in the vertical direction to form an outer inlet vertical plate 516, which extends along the extension direction of the reference axis M; the horizontal ends of the outer inlet vertical plate are respectively connected to the first One end of the board and the second end.

The inner inlet upright plate 514 is parallel to the outer inlet upright plate, and in the horizontal direction, the inner inlet upright plate 514 is located on the side of the outer inlet upright plate 516 facing the second end 5112, and the inner inlet upright plate 514 is along the reference axis The extension direction of M extends. The two horizontal ends of the inner inlet vertical plate 514 are respectively connected to the first end plate and the second end.

In the horizontal direction, the top of the inclined inlet plate 515 is located on the side of the outer inlet vertical plate 516 away from the second end, the inclined inlet plate 515 extends along the extension direction of the reference axis, and the horizontal ends of the inclined inlet plate They are respectively connected to the first end plate and the second end, and the distance between the inclined inlet plate 515 and the inner inlet vertical plate 514 gradually increases from bottom to top.

The inclined inlet plate 515 and the inner inlet vertical plate 514 form a feeding box 800. The feeding box 800 has a feeding cavity 801. The inlet 53 is formed between the inclined inlet plate and the outer inlet vertical plate. The feeding port 53 faces upwards and communicates with the feeding cavity 801.

In the horizontal direction, the inner inlet upright plate 514 is located between the outer inlet upright plate 516 and the filter screen 61, and the top 5142 of the inner inlet upright plate 514 exceeds the bottom of the outer inlet upright plate upwards and is lower than the following filter screen 61 central axis.

The outer inlet vertical plate 516 and the inner inlet vertical plate 514 form a feed channel 802 extending in the up and down direction. The feed channel 802 communicates with the feed cavity 801 downward; the feed channel 802 moves upward along the screen. The direction communicates with the separation chamber 200.

An air deflector 220 is installed in the feed cavity 801, and the air deflector 220 is parallel to the inner inlet vertical plate and fixed on the first end plate 58 and the second end plate 59.

In the horizontal direction, the first discharge side plate 513 is located on the side of the inner inlet vertical plate 514 facing the second end 5112; the top of the first discharge side plate 513 is hermetically connected to the inner inlet vertical plate 514, and It extends obliquely downward toward the direction away from the inner entrance vertical plate 514. The two horizontal ends of the first discharging side plate 513 are respectively connected to the first end plate and the second end.

The second discharging side plate 512 is formed by the second end 5112 extending obliquely downward. The second discharging side plate 512 extends obliquely in the direction of the first discharging side plate 513; The two ends in the horizontal direction are respectively connected to the first end plate and the second end.

In this embodiment, the semi-circular arc plate 511, the outer inlet vertical plate 516, the inner inlet vertical plate 514, the inclined inlet plate 515, the first discharge side plate 513, and the second discharge side plate 512 are collectively formed as the middle plate portion 51 .

A coarse material discharge cavity 210 is formed between the first discharge side plate and the second discharge side plate. A discharging barrel 52 is connected to the lower end of the first discharging side plate 513 and the second discharging side plate 512. The bottom of the discharging barrel forms a coarse material outlet 54, that is, the bottom of the coarse material discharging cavity forms the coarse material Exit.

A waste outlet 55 is provided at the bottom of the feeding box 800, and a plug-in valve 551 is installed on the waste outlet 55.

The screen 60 includes a ring-shaped filter screen 61 and a first connecting plate 62 and a second connecting plate 63 fixedly connected to the two ends of the filter screen in the axial direction. The center axis of the filter screen is parallel to the reference axis. M. A reinforcing plate 665 is installed on the outer side of the first connecting plate 62, a short shaft 64 extending in the direction of the reference axis M is fixedly installed on the reinforcing plate, and a hollow extending in the direction of the reference axis is fixedly installed on the second connecting plate 63轴65. The hollow shaft communicates with the inner cavity 600 of the screen.

A stub shaft sleeve 661 is installed on the first end plate 58, the stub shaft is supported on the stub shaft sleeve 661, and a rubber seal 662 and a first bearing are installed between the stub shaft sleeve 661 and the stub shaft 65 663, where the first bearing 663 is installed on the outside of the stub shaft sleeve, and is compressed with an annular end cover 664. The short shaft is connected to the output shaft of the reducer 12. That is, the short shaft is rotatably supported on the first end plate, and is connected to the driving motor after extending out of the first end plate.

A shaft end connection assembly 67 is provided on the outside of the second end plate 59. The shaft end connection assembly 67 includes a first sleeve 671 fixed on the outside of the second end plate, and a first sleeve 671 connected to the first sleeve 671. Two sleeves 674 and a transition pipe 677 connected to the second sleeve. The first sleeve 671, the second sleeve 674 and the transition pipe 677 are coaxially arranged and extend along the reference axis M direction.

The inner cavity of the first sleeve, the second sleeve and the transition pipe are jointly formed as a shaft hole, which is inserted into the shaft hole. A sealing ring 672 is provided between the first sleeve and the hollow shaft. A lip-shaped seal ring 678 is arranged between the cylinder and the hollow shaft, and the hollow shaft is rotatably supported in the transition pipe via a second bearing 676; an annular seal 673 is installed between the first sleeve and the second sleeve. That is, the hollow shaft is sealedly inserted into the shaft hole, and the screen can rotate relative to the shaft end connecting assembly.

A blowback pipe 675 is installed on the second sleeve. The blowback pipe 675 penetrates the wall of the second sleeve 674. The blowback pipe extends outward from the second sleeve and connects to the first compressed air device. Along the reference axis direction, the blowback tube is closer to the second end plate relative to the lip seal ring.

The transition pipe is fixedly connected with a discharge pipe 38, which is connected to the powder inlet pipe 34 of the cyclone separator 30, and is connected to the air inlet of the induced draft fan through the cyclone separator.

The screening device also includes a blow-off tube 70, one end of the blow-off tube is located in the inner cavity of the screen, the other end of the blow-off tube passes through the inner cavity of the hollow shaft and then extends into the transition tube, and then passes through the A blow-off air inlet is formed behind the pipe wall of the transition pipe. The blow-off pipe is fixedly connected to the transition pipe and has no contact with the hollow shaft. The blow-off air inlet communicates with the second compressed air device; the blow-off pipe is located on the screen Air jet holes are opened on one end of the inner cavity of the net. In this embodiment, the hole diameter of the air injection hole is 2.0 mm, and the blow-off tube is used to inject compressed air with a pressure of 0.3 Mpa outward. It can be understood that in other embodiments, the aperture of the air jet hole can also be 1.5 mm, 2.2 mm, 2.5 mm or 3.0 mm, and of course it can be other values between 1.5 mm and 3 mm. In other embodiments, according to different needs, the pressure of the compressed air injected from the blow-off tube can also be 0.1Mpa, 0.5Mpa, 0.6Mpa or 0.8Mpa, of course, it can also be other types between 0.1-0.8Mpa. data.

Specifically, in this embodiment, the blow-off tube 70 includes a porous tube 71, a connecting elbow 72, an inner sleeve 73, and a fixed tube 76 that are connected in sequence. The porous tube 71 is located in the inner cavity of the screen. An air jet hole facing downward is provided on the upper part. One end of the inner sleeve 73 is connected to the porous pipe 71 through the connecting pipe 72. The other end of the inner sleeve 73 penetrates the inner cavity of the hollow shaft and then extends into the transition pipe 677. In the inner cavity, the fixed pipe 76 penetrates the wall of the transition pipe 677, the fixed pipe 76 is sealed to the inner sleeve 73 via a threaded shorting 75, and the end of the fixed pipe located outside the transition pipe is formed as a blow-off Air inlet 761.

Claims (10)

A production system for wax powder with a set particle size, which is characterized in that it comprises a screening device, a drive motor and a draft device. The screening device includes a housing and a sieve rotatably built in the housing. The sieve has An inner cavity, the output shaft of the drive motor is connected to the screen, and is used to drive the screen to rotate; A separation cavity is formed between the screen and the housing, and the housing is provided with a feed port which communicates with the separation cavity; a coarse material outlet is provided at the bottom of the housing, and the coarse material outlet communicates with the separation cavity; The air induction device includes an induced draft fan and a cyclone separator. The cyclone separator has a vertical tube extending in a vertical direction with a closed top. An exhaust pipe is arranged in the vertical tube, and the exhaust pipe extends upward and out of the vertical tube. A powder outlet is formed after the vertical cylinder; a powder inlet pipe is installed along the tangential direction on the upper part of the vertical cylinder, and the powder inlet pipe communicates with the annular cavity between the vertical pipe and the exhaust pipe; A downwardly extending conical tube is provided at the lower end of the vertical cylinder, the powder inlet tube is connected to the inner cavity of the screen, and the exhaust pipe is connected to the air inlet of the induced draft fan; the lower end of the conical tube is formed as a discharge port. The production system according to claim 1, wherein the housing of the screening device includes a first end plate, a second end plate, and a first end plate and a second end plate that extend in a vertical direction and are arranged in parallel. The middle plate part between the end plates, the first end plate and the second end plate are spaced apart along the extension direction of a reference axis, the reference axis extends in the horizontal direction; the opposite ends of the middle plate part are fixedly installed on the The first end plate and the second end plate; The screen includes a circular filter screen, and a first connecting plate and a second connecting plate fixedly connected to the two ends of the filter screen in the axial direction. The center axis of the filter screen is parallel to the reference axis, and the center axis of the filter screen is parallel to the reference axis. A short shaft extending in the direction of the reference axis is fixedly installed on the connecting plate, and a hollow shaft extending in the direction of the reference axis is fixedly installed on the second connecting plate; the short shaft is rotatably supported on the first end plate and extends out of the The first end plate is connected with a driving motor; the hollow shaft is rotatably supported on the second end plate and extends out of the second end plate to communicate with the powder inlet pipe of the cyclone separator. The hollow shaft communicates with the inner cavity of the screen. The production system according to claim 2, wherein: A shaft end connection assembly is provided on the outer side of the second end plate, and the shaft end connection assembly includes a first sleeve fixed on the outer side of the second end plate, a second sleeve connected to the first sleeve, and The transition pipe connected to the second sleeve, the first sleeve, the second sleeve and the transition pipe are coaxially arranged and extend along the reference axis direction; the inner cavity of the first sleeve, the second sleeve and the transition pipe They are formed together as a shaft hole, the hollow shaft is inserted into the shaft hole in a sealed manner, the screen can rotate relative to the shaft end connection assembly; the transition pipe is fixedly connected with a discharge pipe which is connected to the powder inlet pipe of the cyclone separator . The production system according to claim 3, wherein: A sealing ring is provided between the first sleeve and the hollow shaft, a lip-shaped sealing ring is provided between the second sleeve and the hollow shaft, and the hollow shaft is rotatably supported in the transition pipe via a second bearing; A blowback pipe is installed on the second sleeve. The blowback pipe penetrates the barrel wall of the second sleeve. The blowback pipe extends outwards from the second sleeve and connects to the first compressed air device. Along the reference axis, the blowback pipe is connected to the first compressed air device. The blow pipe is closer to the second end plate relative to the lip seal ring. The production system according to claim 3 or 4, wherein: The screening device also includes a blow-off tube, one end of the blow-off tube is located in the inner cavity of the screen, the other end of the blow-off tube passes through the inner cavity of the hollow shaft and then extends into the transition tube, and then passes through the transition A blow-off air inlet is formed behind the pipe wall, the blow-off pipe is fixedly connected to the transition pipe and has no contact with the hollow shaft, and the blow-off air inlet is connected to the second compressed air device; the blow-off pipe is located on the screen An air jet hole is opened on one end of the inner cavity. The production system according to claim 5, wherein: The blow-off pipe includes a porous pipe, a connecting elbow, an inner sleeve, and a fixed pipe that are sequentially connected. The perforated pipe is located in the inner cavity of the screen. The perforated pipe is provided with jet holes facing downward. One end is connected to the porous tube through a connecting play tube, the other end of the inner sleeve passes through the inner cavity of the hollow shaft and then extends into the inner cavity of the transition tube. The fixed tube penetrates the wall of the transition tube, and the fixed tube passes through the inner cavity of the transition tube. A threaded short is connected to the inner sleeve in a sealing manner, and one end of the fixed pipe located on the outer side of the transition pipe is formed as a blow-off air inlet. The production system according to claim 6, wherein: The hole diameter of the air injection hole is 1.5mm-3mm, and the blow-off tube is used to inject compressed air with a pressure of 0.1-0.8Mpa outward. The production system according to claim 2, wherein: The middle board includes: Half-circular arc plate, the semi-circular arc plate is in the shape of a semi-circular arc protruding upward, the two ends of the semi-circular arc plate in the circumferential direction face downward, and the semi-circular arc plate is located above the filter screen; the semi-circular arc plate The two ends of the plate are respectively formed as a first end and a second end, and the width direction of the semicircular arc plate extends along the extension direction of the reference axis; An outer inlet vertical plate, the outer inlet vertical plate is formed by the first end portion extending downward in the vertical direction, the outer inlet vertical plate extends along the extension direction of the reference axis; the horizontal two ends of the outer inlet vertical plate Respectively connected to the first end plate and the second end; An inner inlet vertical plate, the inner inlet vertical plate is parallel to the outer inlet vertical plate, and in the horizontal direction, the inner inlet vertical plate is located on the side of the outer inlet vertical plate facing the second end, the inner inlet vertical plate Extending along the extension direction of the reference axis; the two ends of the inner inlet vertical plate in the horizontal direction are respectively connected to the first end plate and the second end; An inclined inlet plate, in the horizontal direction, the top of the inclined inlet plate is located on the side of the outer inlet vertical plate away from the second end, the inclined inlet plate extends along the extension direction of the reference axis, and the horizontal direction of the inclined inlet plate The two ends of the are respectively connected to the first end plate and the second end, and the distance between the inclined inlet plate and the inner inlet vertical plate gradually increases from bottom to top; The inclined inlet plate and the inner inlet vertical plate form a feeding box, the feeding box has a feeding cavity; the inclined inlet plate and the outer inlet vertical plate form the feeding port, the feeding port faces upward, and Communicate with the feed cavity; In the horizontal direction, the inner inlet vertical plate is located between the outer inlet vertical plate and the filter screen, and the top of the inner inlet vertical plate exceeds the bottom of the outer inlet vertical plate upwards and is lower than the central axis of the filter screen; the outer inlet vertical plate A feed channel extending in the up and down direction is formed between the vertical plate and the inner inlet, the feed channel communicates with the feed cavity downward; the feed channel communicates with the separation cavity upward along the rotation direction of the screen; The middle plate part further includes: A first discharging side plate, in the horizontal direction, the first discharging side plate is located on the side of the inner inlet vertical plate facing the second end; the top of the first discharging side plate is sealingly connected to the inner inlet vertical The two ends of the first discharge side plate in the horizontal direction are respectively connected to the first end plate and the second end; A second discharging side plate, the second discharging side plate is formed by the second end portion extending obliquely downward, and the second discharging side plate extends obliquely in the direction of the first discharging side plate; the second outlet The two ends of the material side plate in the horizontal direction are respectively connected to the first end plate and the second end; A coarse material discharging cavity is formed between the first discharging side plate and the second discharging side plate, and the coarse material outlet is formed at the bottom of the coarse material discharging cavity. The production system according to claim 8, wherein: A waste outlet is arranged at the bottom of the feeding box, and a plug-in valve is installed on the waste outlet. The production system according to claim 8, wherein: An air deflector is installed in the feed channel, and the air deflector is parallel to the inner inlet vertical plate.

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