CN212221700U

CN212221700U - Powder conveying device

Info

Publication number: CN212221700U
Application number: CN202020648644.2U
Authority: CN
Inventors: 张继锋; 刘红星; 程嘉懿
Original assignee: Xi'an Fred Food And Beverage Co ltd
Current assignee: Xi'an Fred Food And Beverage Co ltd
Priority date: 2020-04-25
Filing date: 2020-04-25
Publication date: 2020-12-25
Anticipated expiration: 2030-04-25

Abstract

The utility model discloses a powder conveyor relates to conveyor technical field. The technical key points are as follows: the feeding device comprises a first feeding pipe, one end of the feeding pipe is connected with a vacuum pump, a feeding chamber is arranged above one end, close to the vacuum pump, of the first feeding pipe, an inlet pipe is arranged on the feeding chamber in the vertical direction, the inlet pipe is communicated with the first feeding pipe, the other end of the first feeding pipe is connected with a cooling assembly, a filter screen is connected onto the cooling assembly, the cooling assembly is flexibly connected with the top of the filter screen, a storage tank is arranged below the filter screen in the vertical direction, a damping device is arranged between the filter screen and the storage tank in the vertical direction, a vibration motor is arranged on the side wall of the filter screen, a discharge port is arranged below the filter screen, the discharge port is flexibly connected with the storage tank, and a sundry outlet is formed in the side wall of the filter screen. The utility model has the advantages of high product quality.

Description

Powder conveying device

Technical Field

The utility model belongs to the technical field of conveyor technique and specifically relates to a powder conveyor is related to.

Background

When the oil tea is produced, flour needs to be fried, then the flour and other raw materials need to be conveyed to a stirrer to be stirred, and when powder materials are conveyed, the powder materials need to be conveyed by a conveying device.

The utility model discloses a powder conveyor at chinese utility model patent of publication No. CN204473874U, its technical essential is: the device comprises a feeding pipe, wherein one end of the feeding pipe is connected with a vacuum pump, the other end of the feeding pipe is connected with a cyclone separator, a feeding chamber is arranged above the end, close to the vacuum pump, of the feeding pipe, the upper part of the feeding chamber is cylindrical, the lower part of the feeding chamber is conical, the top of the feeding chamber is connected with a feeding pipe, the bottom of the feeding chamber is connected with the feeding pipe through a vertical pipe, and the vertical pipe is provided with a one-way valve.

The above prior art solution has the following drawbacks: above-mentioned technical scheme can carry the powder, can not cause dust pollution moreover, but when having the powder of stir-fry paste in the last process in the powder that contains impurity and the powder that carries, the powder that contains impurity also can drop to the holding vessel in, influences the quality of product, and product quality is poor.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a powder conveyor, it has the advantage that product quality is high.

The above object of the present invention can be achieved by the following technical solutions:

the utility model provides a powder conveyor, includes first conveying pipe, the one end of first conveying pipe is connected with the vacuum pump, the one end top that first conveying pipe is close to the vacuum pump is provided with the feed space, be provided with the inlet pipe along vertical direction on the feed space, inlet pipe and first conveying pipe intercommunication, the other one end of first conveying pipe is connected with cooling module, the last filter sieve that is connected with of cooling module, cooling module and the top flexonics of filter sieve, the below of filter sieve is provided with the storage tank along vertical direction, be provided with damping device along vertical direction between filter sieve and the storage tank, the filter sieve lateral wall is provided with vibrating motor, the filter sieve below is provided with the discharge gate, discharge gate and storage tank flexonics, miscellaneous mouthful has been seted up to the lateral wall of filter sieve.

Through adopting above-mentioned technical scheme, when carrying the powder of system of frying, at first by the feed chamber to the inlet pipe pay-off, then carry out the negative pressure pay-off by the vacuum pump that is equipped with, send the powder into in the cooling module through the conveying pipe that is equipped with, after cooling the powder by the cooling module, fall into and filter on the sieve, vibrating motor vibrates the filter sieve, make the filter sieve luffing motion, damping device carries out the shock attenuation to the filter sieve, the filter sieve sieves the powder after the cooling, qualified powder after the screening falls into the storage tank through the discharge gate that the filter sieve below was equipped with, the powder of the paste of frying and impurity carry out the play miscellaneous mouthful discharge that sets up through the lateral wall of filter sieve, can in time sieve qualified powder and unqualified powder, the quality of product has been improved.

The present invention may be further configured in a preferred embodiment as: the cooling assembly comprises a primary cyclone separator and a secondary cyclone separator, the primary cyclone separator is communicated with the secondary cyclone separator through a second feeding pipe, one end of the second feeding pipe is communicated with the bottom end of the primary cyclone separator, the other end of the second feeding pipe is communicated with the secondary cyclone separator and is positioned at the upper end of the secondary cyclone separator, and exhaust pipes are arranged at the upper ends of the primary cyclone separator and the secondary cyclone separator.

Through adopting above-mentioned technical scheme, after the powder that will fry the system passes through vacuum pump negative pressure pay-off, the temperature of powder is higher this moment, send the powder into one-level cyclone through the pay-off pipe at first, the air exchanges heat with the powder, one-level cyclone cools down the powder, the gas that produces after the cooling is discharged one-level cyclone by the blast pipe that is equipped with, the powder temperature at this moment is still higher, the powder after the cooling is sent into in the second cyclone through the second pay-off pipe, the second cyclone cools down the powder once more, the gas that produces after the cooling is discharged through the blast pipe that is equipped with on the second cyclone, the powder after the cooling falls into and filters it on the filter sieve, cool off high temperature powder, can not influence going on of follow-up work, made things convenient for the filter sieve to sieve the flour of frying the paste.

The present invention may be further configured in a preferred embodiment as: damping device includes loop bar, sleeve, damping spring, the filter sieve includes a sieve section of thick bamboo, screen cloth, the muffjoint is in the outside of loop bar, loop bar and sleeve sliding connection, telescopic one end and the diapire fixed connection of a sieve section of thick bamboo are kept away from to the loop bar, the sleeve is kept away from the one end of loop bar and the last top wall fixed connection of storage tank, damping spring is located between storage tank and the loop bar, damping spring's one end and the one end fixed connection that the filter sieve was kept away from to the loop bar, damping spring's other one end and the roof fixed connection of storage tank, be provided with between loop bar and the sleeve and prevent that the loop bar from breaking away from telescopic anticreep subassembly.

Through adopting above-mentioned technical scheme, when the filter sieve filters the powder, need to filter the sieve shock attenuation, vibrating motor makes the filter sieve constantly go up and down, the loop bar slides in the sleeve this moment, the anticreep subassembly that is equipped with makes loop bar and sleeve can not break away from, the spring is compressed and extension, loop bar and telescopic life have been prolonged, the cushioning effect of filter sieve in the screening in-process has also been realized, moreover, the steam generator is simple in structure, easy to operate, to the more thorough of unqualified powder screening, the product quality who produces is high.

The present invention may be further configured in a preferred embodiment as: the anticreep subassembly includes spacing ring, guide ring, the spacing ring is located the sleeve towards the one end inside wall of loop bar, the guide ring is located the lateral wall of loop bar towards sleeve one end.

Through adopting above-mentioned technical scheme, when carrying out spacingly to loop bar and sleeve, the guide ring slides in the sleeve, slides when the loop bar keeps away from storage tank one end to the sleeve, and the spacing ring that the sleeve inside wall was equipped with is injectd the position of loop bar, and the loop bar can not the roll-off sleeve, and the filter sieve can not damaged.

The present invention may be further configured in a preferred embodiment as: the screen is arranged in the screen cylinder in an inclined mode, and the impurity outlet is located at the lower end of the screen.

Through adopting above-mentioned technical scheme, the filter sieve is to the raw materials screening backs such as the flour of stir-fry system, need take out from the screen cloth the flour of stir-fry paste, sets up the slope of screen cloth, and the flour of stir-fry paste all gathers in the lower end of screen cloth, has made things convenient for raw materials such as the flour of stir-fry paste in time to take out from the filter sieve, can not influence the filter sieve and sieve the raw materials of stir-fry system, and screening effect is good, and the product quality of producing is high.

The present invention may be further configured in a preferred embodiment as: the discharge gate is hourglass hopper-shaped.

Through adopting above-mentioned technical scheme, screening the material after, the material falls into the storage tank in following the filter sieve, if the lower extreme of filter sieve sets up to circular, the material can fall out the storage tank, can raise great dust moreover, the polluted environment causes the loss to the raw materials, sets up the discharge gate into leaking hopper-shaped, has made things convenient for the business turn over of material, and raw materials such as flour can not the polluted environment.

The present invention may be further configured in a preferred embodiment as: go out miscellaneous mouthful department and be provided with the deflector, the deflector slope set up and with a sieve section of thick bamboo fixed connection, the lateral wall of a sieve section of thick bamboo is provided with the L shaped plate along vertical direction, the L shaped plate forms with a sieve section of thick bamboo lateral wall and holds the chamber, it is provided with the closing plate along vertical direction to hold the intracavity, the closing plate with hold chamber sliding connection, be provided with the spring catch on the L shaped plate towards one side inside wall of miscellaneous mouthful, the pointed end of spring catch is the button head form, the closing plate is kept away from miscellaneous mouthful one side and is seted up with spring catch complex recess.

Through adopting above-mentioned technical scheme, after the filter sieve sieves the flour of frying, the flour of frying the paste need take out the material through going out miscellaneous mouthful, at the in-process that takes out, the deflector of setting has made things convenient for taking out of flour, the flour of frying the paste can not drop in other positions, can not cause environmental pollution, at the screening in-process, the closing plate slides in the intracavity that holds that L shaped plate and sieve section of thick bamboo formed, go out miscellaneous mouthful jam, the filter sieve sieves, the spring catch that is equipped with has restricted the removal of closing plate with the recess cooperation, when the material of frying the paste after the screening needs to be taken out, remove the closing plate once more and open miscellaneous mouthful, when the closing plate rises to the highest point, through the spring catch that is equipped with and the recess cooperation that the top was equipped with once more, it prescribes a limit to the position of closing plate, the taking out and the screening of frying the paste.

The present invention may be further configured in a preferred embodiment as: be connected with the exhaust tube on the blast pipe, the exit of exhaust tube is provided with the filter screen, the filter screen can be dismantled with the exhaust tube and be connected, filter screen department is connected with the air exhauster, second grade cyclone's top is provided with the supporting seat, the organism and the supporting seat fixed connection of air exhauster.

Through adopting above-mentioned technical scheme, carry out refrigerated in-process to the flour of stir-fry, need discharge steam from the blast pipe, the air exhauster provides wind-force for the exhaust column, and the exhaust column will be taken out rather than the steam in the blast pipe of intercommunication, takes out the in-process and can cause environmental pollution with partly powder suction one-level cyclone and second grade cyclone, and the filter screen that is equipped with has avoided causing the pollution to the environment.

To sum up, the utility model discloses a following at least one useful technological effect:

1. through the arrangement of the filter sieve, the vibration motor and the damping device, when the fried flour is screened, the vibration motor is driven to shake, so that the filter sieve is lifted, the damping spring plays a damping role on the filter sieve, the filter sieve is convenient to screen, the fried flour is screened more thoroughly, and the quality of the screened product is high;

2. through setting up the miscellaneous mouthful, the deflector, hold the chamber, the closing plate, the spring catch, a groove, when the flour clearance of frying the paste after screening on the filter sieve, at first slide holding the intracavity through the closing plate that is equipped with, when rising to a take the altitude, the miscellaneous mouthful is opened with the spring catch cooperation that is equipped with in the holding tank to the recess of seting up on the closing plate, the deflector that the material was equipped with from miscellaneous mouthful department flows, the material that has made things convenient for to fry the paste in time takes out from the filter sieve, can not influence the screening to frying system flour, product quality after the screening is high.

Drawings

FIG. 1 is a schematic view of the overall construction of a powder conveying apparatus;

FIG. 2 is a schematic view of a filter screen attachment configuration;

FIG. 3 is a perspective sectional view taken along line A-A of FIG. 2;

fig. 4 is a schematic view of a connection structure of the sealing plate and the receiving groove.

Reference numerals: 1. a first feed pipe; 2. a vacuum pump; 3. a feed chamber; 4. a feed pipe; 5. filtering and screening; 51. a screen cylinder; 52. screening a screen; 6. a material storage tank; 7. a vibration motor; 8. a discharge port; 9. a sundry outlet; 10. a primary cyclone separator; 11. a secondary cyclone separator; 12. a second feed tube; 13. an exhaust pipe; 14. a loop bar; 15. a sleeve; 16. a damping spring; 17. a limiting ring; 18. a guide ring; 19. a guide plate; 20. an L-shaped plate; 21. an accommodating chamber; 22. a sealing plate; 23. a spring pin; 24. a groove; 25. an air exhaust pipe; 26. a filter screen; 27. an exhaust fan; 28. and (4) supporting the base.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, a powder conveying device disclosed by the present invention comprises a first feeding pipe 1, one end of the first feeding pipe 1 is connected with a vacuum pump 2, a feeding chamber 3 is arranged above one end of the first feeding pipe 1 close to the vacuum pump 2, a feeding pipe 4 is fixedly connected to the feeding chamber 3 along the vertical direction, the feeding pipe 4 is communicated with the first feeding pipe 1, the other end of the first feeding pipe 1 is connected with a cooling assembly, the cooling assembly is connected with a filter sieve 5, the cooling assembly is flexibly connected with the top of the filter sieve 5, the connection part is a rubber hose, a storage tank 6 is connected below the filter sieve 5 along the vertical direction, a damping device is arranged between the filter sieve 5 and the storage tank 6 along the vertical direction, the side wall of the filter sieve 5 is fixedly connected with 2 symmetrical vibrating motors 7, a discharge port 8 is arranged below the filter sieve 5, the discharge port 8 is flexibly connected with the storage tank 6, and the connection part is a rubber hose, when the material fell into storage tank 6 in the filter sieve 5, the material may fall out storage tank 6, can raise great dust moreover, and the polluted environment causes the loss to the raw materials, and discharge gate 8 is hourglass hopper-shaped, has made things convenient for the business turn over of material, and raw materials such as flour can not the polluted environment, and impurity outlet 9 has been seted up to the lateral wall of filter sieve 5. When the fried powder is conveyed, firstly, the feeding pipe 4 is fed by the feeding chamber 3, then, the vacuum pump 2 is arranged for negative pressure feeding, the powder is fed into the cooling assembly through the feeding pipe, the powder is cooled by the cooling assembly and then falls onto the

filter sieve

5, 2 vibration motors 7 vibrate the filter sieve 5, the filter sieve 5 swings up and down, the vibration absorption device absorbs vibration of the filter sieve 5, the filter sieve 5 sieves the cooled powder, the screened qualified powder falls into the storage tank 6 through the discharge port 8 arranged below the filter sieve 5, the powder and impurities which are fried with paste are discharged through the impurity outlet 9 arranged on the side wall of the filter sieve 5, the qualified powder and the unqualified powder can be screened in time, and the product quality is improved.

In this embodiment, cooling unit includes one-level cyclone 10, second grade cyclone 11, one-level cyclone 10 and second grade cyclone 11 pass through second conveying pipe 12 intercommunication, the one end of second conveying pipe 12 and the bottom intercommunication of one-level cyclone 10, the other one end of second conveying pipe 12 and second grade cyclone 11 intercommunication and be located the upper end of second grade cyclone 11, the upper end of one-level cyclone 10 and second grade cyclone 11 all is provided with blast pipe 13. After the fried powder is fed by the vacuum pump 2 under negative pressure, the temperature of the powder is higher and ranges from 100 ℃ to 120 ℃, the powder is firstly fed into a primary cyclone separator 10 through a feeding pipe, air exchanges heat with the powder, the primary cyclone separator 10 cools the powder by 50 ℃ to 80 ℃, gas generated after cooling is discharged out of the primary cyclone separator 10 through a discharge pipe 13, the temperature of the powder is still higher, the cooled powder is fed into a secondary cyclone separator 11 through a second feeding pipe 12, the secondary cyclone separator 11 cools the powder again, the temperature of the powder is reduced by 30 ℃ to 50 ℃ again, the gas generated after cooling is discharged through the discharge pipe 13 arranged at the upper end of the secondary cyclone separator 11, the cooled powder falls onto a filter sieve 5 to be filtered, and the high-temperature powder is cooled, the follow-up work can not be influenced, and the filter sieve 5 is convenient for sieving the fried flour.

The in-process that carries out the refrigerated to the flour of stir-fry, need discharge steam from blast pipe 13, be connected with exhaust tube 25 on the blast pipe 13, the exit of exhaust tube 25 is provided with filter screen 26, and filter screen 26 passes through the bolt can dismantle with exhaust tube 25 and be connected, and filter screen 26 department is connected with air exhauster 27, and the top of second grade cyclone 11 is provided with supporting seat 28, air exhauster 27's organism and supporting seat 28 fixed connection. The exhaust fan 27 provides wind power for the exhaust pipe, the exhaust pipe pumps hot air in the exhaust pipe 13 communicated with the exhaust pipe, a part of powder is sucked out of the primary cyclone separator 10 and the secondary cyclone separator 11 in the pumping process, so that environmental pollution is caused, and the filter screen 26 is arranged to avoid environmental pollution.

Referring to fig. 3, in this embodiment, the damping device includes a loop bar 14, a sleeve 15, and a damping spring 16, the filter sieve 5 includes a sieve tube 51, a screen 52, the sleeve 15 is sleeved outside the loop bar 14, the loop bar 14 is slidably connected to the sleeve 15, one end of the loop bar 14 away from the sleeve 15 is fixedly connected to a bottom wall of the sieve tube 51, one end of the sleeve 15 away from the loop bar 14 is fixedly connected to an upper top wall of the storage tank 6, the damping spring 16 is located between the storage tank 6 and the loop bar 14, one end of the damping spring 16 is fixedly connected to one end of the loop bar 14 away from the filter sieve 5, the other end of the damping spring 16 is welded to a top wall of the storage tank 6, and an anti-falling assembly for preventing the loop bar 14 from falling off the sleeve 15 is provided between. When filter sieve 5 filters the powder, need filter sieve 5 shock attenuation, vibrating motor 7 makes filter sieve 5 constantly go up and down, loop bar 14 slides in sleeve 15 this moment, the anticreep subassembly that is equipped with makes loop bar 14 can not break away from with sleeve 15, the spring is compressed and extension, loop bar 14 and sleeve 15's life has been prolonged, filter sieve 5 also has been realized at the cushioning effect of screening in-process, moreover, the steam generator is simple in structure, and the steam generator is easy to operate, more thorough to unqualified powder screening, the product quality who produces is high.

In this embodiment, anticreep subassembly includes spacing ring 17, guide ring 18, spacing ring 17 is located sleeve 15 towards the one end inside wall of loop bar 14, guide ring 18 is located loop bar 14 towards the lateral wall of sleeve 15 one end, when carrying on spacingly to loop bar 14 and sleeve 15, guide ring 18 slides in sleeve 15, when loop bar 14 slides to sleeve 15 and keeps away from 6 one end of storage tank, spacing ring 17 that the sleeve 15 inside wall was equipped with is injectd loop bar 14's position, loop bar 14 can not the roll-off sleeve 15, filter sieve 5 can not damaged.

After the filter sieve 5 sieves the fried flour and other raw materials, the fried flour which is fried and burnt needs to be taken out from the screen mesh 52, the screen mesh 52 is obliquely arranged in the screen cylinder 51, the impurity outlet 9 is positioned at the lower end of the screen mesh 52, the fried and burnt flour is gathered at the lower end of the screen mesh 52, so that the fried and burnt flour and other raw materials can be taken out from the filter sieve 5 in time, the filter sieve 5 can not be influenced to sieve the fried raw materials, the sieving effect is good, and the quality of the produced product is high.

Referring to fig. 2 and 4, a guide plate 19 is arranged at the trash outlet 9, the guide plate 19 is obliquely arranged and welded with a screen cylinder 51, a L-shaped plate 20 is arranged on the side wall of the screen cylinder 51 along the vertical direction, the L-shaped plate 20 and the side wall of the screen cylinder 51 form an accommodating cavity 21, a sealing plate 22 is arranged in the accommodating cavity 21 along the vertical direction, the sealing plate 22 is in sliding connection with the accommodating cavity 21, a spring pin 23 is arranged on the inner side wall of the L-shaped plate 20 facing the trash outlet 9, the tip of the spring pin 23 is round, and a groove 24 matched with the spring pin 23 is formed in the side, far away from the trash outlet 9, of the sealing plate 22. After the filter sieve 5 sieves the flour of stir-fry, take out the material through miscellaneous mouthful 9, in the in-process of taking out, the deflector 19 that sets up has made things convenient for taking out of flour, the flour of stir-fry paste can not drop in other positions, can not cause environmental pollution, in the screening process, closing plate 22 slides in the holding chamber 21 that L shaped plate 20 and sieve section of thick bamboo 51 formed, block up miscellaneous mouthful 9 of going out, filter sieve 5 sieves, the spring catch 23 that is equipped with cooperates with recess 24 and has restricted the removal of closing plate 22, when the material of stir-fry paste after the screening needs to take out, remove closing plate 22 once more and open miscellaneous mouthful 9, when closing plate 22 ascends to the highest point, cooperate with the recess 24 that the top was equipped with once more through spring catch 23 that is equipped with, the position of closing plate 22 is injectd, make things convenient for taking out and sieving of stir-fry paste material, and improved product quality.

The implementation principle of the embodiment is as follows: when fried powder is conveyed, firstly, a feeding pipe 4 is fed by a feeding chamber 3, then negative pressure feeding is carried out by an arranged vacuum pump 2, then the powder is firstly cooled by an arranged primary cyclone separator 10, then secondary cooling is carried out by a secondary cyclone separator 11, hot gas generated after cooling is discharged to the outside by an exhaust pipe 13 under the action of an exhaust fan 27, the cooled powder falls into a filter sieve 5 to be sieved, qualified materials fall into a storage tank 6 through a funnel-shaped discharge port 8 arranged below the filter sieve 5, when the sieved powder of fried paste is discharged through a sundry outlet 9 arranged on a sieve cylinder 51, a sealing plate 22 slides in a containing cavity 21 to enable a spring pin 23 to be matched with a groove 24, the sundry outlet 9 is opened to clean the fried paste powder, and the burnt powder can be screened and cleaned in time, the produced product has high quality.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A powder conveying device comprises a first conveying pipe (1), one end of the first conveying pipe (1) is connected with a vacuum pump (2), a feeding chamber (3) is arranged above one end, close to the vacuum pump (2), of the first conveying pipe (1), a feeding pipe (4) is arranged on the feeding chamber (3) in the vertical direction, the feeding pipe (4) is communicated with the first conveying pipe (1), the powder conveying device is characterized in that the other end of the first conveying pipe (1) is connected with a cooling assembly, a filtering screen (5) is connected onto the cooling assembly, the cooling assembly is flexibly connected with the top of the filtering screen (5), a storage tank (6) is arranged below the filtering screen (5) in the vertical direction, a damping device is arranged between the filtering screen (5) and the storage tank (6) in the vertical direction, and a vibration motor (7) is arranged on the side wall of the filtering screen (5), a discharge port (8) is arranged below the filter sieve (5), the discharge port (8) is flexibly connected with the storage tank (6), and a sundry outlet (9) is formed in the side wall of the filter sieve (5).

2. The powder conveying device as claimed in claim 1, wherein the cooling assembly comprises a primary cyclone separator (10) and a secondary cyclone separator (11), the primary cyclone separator (10) is communicated with the secondary cyclone separator (11) through a second feeding pipe (12), one end of the second feeding pipe (12) is communicated with the bottom end of the primary cyclone separator (10), the other end of the second feeding pipe (12) is communicated with the secondary cyclone separator (11) and is positioned at the upper end of the secondary cyclone separator (11), and exhaust pipes (13) are arranged at the upper ends of the primary cyclone separator (10) and the secondary cyclone separator (11).

3. The powder conveying device according to claim 1, wherein the damping device comprises a loop bar (14), a sleeve (15) and a damping spring (16), the filter screen (5) comprises a screen drum (51) and a screen (52), the sleeve (15) is sleeved outside the loop bar (14), the loop bar (14) is connected with the sleeve (15) in a sliding manner, one end of the loop bar (14) far away from the sleeve (15) is fixedly connected with the bottom wall of the screen drum (51), one end of the sleeve (15) far away from the loop bar (14) is fixedly connected with the upper top wall of the storage tank (6), the damping spring (16) is positioned between the storage tank (6) and the loop bar (14), one end of the damping spring (16) is fixedly connected with one end of the loop bar (14) far away from the filter screen (5), and the other end of the damping spring (16) is fixedly connected with the top wall of the storage tank (6), an anti-falling component for preventing the loop bar (14) from being separated from the sleeve (15) is arranged between the loop bar (14) and the sleeve (15).

4. The powder conveying device of claim 3, wherein the anti-dropping assembly comprises a limiting ring (17) and a guide ring (18), the limiting ring (17) is positioned on the inner side wall of one end of the sleeve (15) facing the sleeve rod (14), and the guide ring (18) is positioned on the outer side wall of one end of the sleeve rod (14) facing the sleeve rod (15).

5. A powder conveying device as claimed in claim 3, characterized in that the screen (52) is arranged obliquely in the screen drum (51), and the outlet (9) is located at the lower end of the screen (52).

6. A powder conveying device as claimed in claim 1, characterised in that the outlet opening (8) is funnel-shaped.

7. The powder conveying device according to claim 5, wherein a guide plate (19) is arranged at the impurity outlet (9), the guide plate (19) is obliquely arranged and fixedly connected with the screen drum (51), an L-shaped plate (20) is arranged on the side wall of the screen drum (51) along the vertical direction, an accommodating cavity (21) is formed by the L-shaped plate (20) and the side wall of the screen drum (51), a sealing plate (22) is arranged in the accommodating cavity (21) along the vertical direction, the sealing plate (22) is slidably connected with the accommodating cavity (21), a spring pin (23) is arranged on the inner side wall of the L-shaped plate (20) facing the impurity outlet (9), the tip of the spring pin (23) is round, and a groove (24) matched with the spring pin (23) is formed on the side of the sealing plate (22) away from the impurity outlet (9).

8. The powder conveying device according to claim 2, wherein an exhaust pipe (25) is connected to the exhaust pipe (13), a filter screen (26) is arranged at an outlet of the exhaust pipe (25), the filter screen (26) is detachably connected to the exhaust pipe (25), an exhaust fan (27) is connected to the filter screen (26), a support base (28) is arranged at the top end of the secondary cyclone separator (11), and a body of the exhaust fan (27) is fixedly connected to the support base (28).