File destroying device for finance

Abstract

The financial document destroying device comprises a bottom plate, an extrusion cylinder is fixedly connected to the upper side of the bottom plate, a screw rod is rotatably connected to the interior of the extrusion cylinder, a breathable mesh cylinder is fixedly connected to the upper side of the extrusion cylinder, and the bottom end of the breathable mesh cylinder communicates with the interior of the extrusion cylinder; the upper end of the breathable mesh cylinder is fixedly connected with a crushing cylinder, a material storage cavity, a primary crushing cavity and a secondary crushing cavity are sequentially formed in the crushing cylinder from top to bottom, a feeding channel is formed in the bottom side wall of the material storage cavity, and the material storage cavity communicates with the primary crushing cavity through the feeding channel. Through mutual cooperation of the spiral rod, the first Laval nozzle, the second Laval nozzle, the air pump and other components, paper can be fully smashed through airflow, the smashed shredded paper can be compressed and discharged, the space occupied by the shredded paper is reduced, and chippings can be conveniently collected.

Description

Technical Field

[0001] The present invention relates to the technical field of document destruction, and particularly to a financial document destruction device. Background Art

[0002] As is well known, the economic confidentiality documents used in the financial system have a great impact on the operation of a company. Once leaked, they may cause huge property losses. Therefore, the economic confidentiality documents used in the financial system need to be destroyed in time after use. Among them, the economic confidentiality document destruction auxiliary device for the financial system is a device used to destroy the economic confidentiality documents for the financial system, and it has been widely used in the field of office supplies.

[0003] After the existing shredder shreds the documents, they directly fall into the storage box. Since the shredded paper after document shredding is fluffy, the inside of the storage box is easily filled up, the storage capacity is small, and the user needs to frequently clean the shredded paper in the storage box. Summary of the Invention

[0004] The present invention provides a financial document destruction device to solve the problems raised in the above background art.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A financial document destruction device includes a bottom plate. A pressing cylinder is fixedly connected to the upper side of the bottom plate. A spiral rod is rotatably connected inside the pressing cylinder. A breathable net cylinder is fixedly connected to the upper side of the pressing cylinder. The bottom end of the breathable net cylinder is communicated with the inside of the pressing cylinder. The upper end of the breathable net cylinder is fixedly connected to a crushing cylinder. Inside the crushing cylinder, a storage cavity, a primary crushing cavity, and a secondary crushing cavity are arranged from top to bottom in sequence. A feed channel is opened on the bottom side wall of the storage cavity. The storage cavity is communicated with the primary crushing cavity through the feed channel. A rotating cylinder is rotatably connected inside the storage cavity. A second rotating shaft is fixedly connected through the center of the rotating cylinder. The two ends of the second rotating shaft respectively penetrate through the two side walls of the storage cavity. A pushing device is arranged on one side of the rotating cylinder;

[0007] A machine box is fixedly connected to the side wall of the crushing cylinder. A motor is fixedly connected to the side wall of the machine box. The output shaft of the motor is fixedly connected to one end of the second rotating shaft. A sixth bevel gear is fixedly connected to one end of the second rotating shaft. A fifth bevel gear is meshed and connected to the side wall of the sixth bevel gear. A first rotating shaft is fixedly connected to the side wall of the fifth bevel gear. The bottom end of the first rotating shaft is rotatably connected to the upper side of the bottom plate. One end of the spiral rod extending out of the pressing cylinder is fixedly connected to a second bevel gear. The second bevel gear is meshed and connected to a first bevel gear. The first bevel gear is fixedly connected to the first rotating shaft;

[0008] On both side walls of the first-stage crushing chamber, straight pipes are respectively and fixedly connected. On the opposite sides of the two straight pipes, a plurality of second Laval nozzles are provided. A grid plate is fixedly connected to the inner side wall of the second Laval nozzle. An air blowing device is arranged on the bottom side of the grid plate. An air pump is fixedly connected to the upper side of the bottom plate. The output end of the air pump is fixedly connected to a first connecting pipe. Two third air guide pipes are fixedly connected to the side wall of the first connecting pipe. The two third air guide pipes are respectively communicated with the two straight pipes. A second-stage crushing and humidifying device is arranged in the second-stage crushing chamber.

[0009] Preferably, the pushing device includes a sliding rod. The sliding rod penetrates through the side wall of the storage chamber. One end of the sliding rod is fixedly connected with an extrusion plate. The other end of the spring is fixedly connected with a fixed block. A spring is sleeved on the sliding rod. The two ends of the spring are respectively fixedly connected to the fixed block and the side wall of the crushing cylinder.

[0010] Preferably, a baffle is slidably connected through the side wall of the storage chamber. One end of the baffle is fixedly connected with a pulling plate.

[0011] Preferably, the air blowing device includes a third rotating shaft. The third rotating shaft is rotatably connected between the two side walls of the first-stage crushing chamber. One end of the third rotating shaft extends out of the crushing cylinder and is fixedly connected with a third bevel gear. A fourth bevel gear is fixedly connected to the side wall of the third bevel gear. The fourth bevel gear is fixedly connected to the first rotating shaft. A reciprocating chute is formed on the side wall of the third rotating shaft. A moving block is slidably connected to the third rotating shaft. A through hole is formed in the moving block. The moving block is slidably connected to the third rotating shaft through the through hole. A slider is fixedly connected to the through hole in the moving block. One end of the slider extends into the reciprocating chute. A strip-shaped air outlet plate is fixedly connected to the upper side of the moving block. The upper side outlet of the strip-shaped air outlet plate abuts against the bottom side wall of the grid plate. A second air guide pipe is fixedly connected to the side wall of the strip-shaped air outlet plate. The second air guide pipe penetrates through the side wall of the crushing cylinder and is connected to the first connecting pipe.

[0012] Preferably, the reciprocating chute is arranged in a rhombic strip shape.

[0013] Preferably, the second-stage crushing and humidifying device includes an annular pipe. The annular pipe is fixedly connected to the outer side wall of the bottom of the crushing cylinder. First Laval nozzles are arranged around the inner part of the second-stage crushing chamber. The four first Laval nozzles are all connected to the annular pipe. A second connecting pipe is fixedly connected to the side wall of the first connecting pipe. The second connecting pipe is connected to the annular pipe through a first air guide pipe. A humidifier is fixedly connected to the upper side of the bottom plate. The output end of the humidifier is connected to the second connecting pipe.

[0014] Preferably, the outlet end of the extrusion cylinder is arranged with a gradually decreasing diameter.

[0015] Preferably, anti-slip patterns are provided on the outer side wall of the rotating cylinder.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] By cooperating with each other such components as the screw rod, the first Laval nozzle, the second Laval nozzle, and the air pump, the present invention can not only fully crush the paper by air flow, but also compress and discharge the shredded paper after crushing, reducing the space occupied by the shredded paper and facilitating the collection of the debris.

[0018] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly and implement it in accordance with the content of the specification, the following takes the preferred embodiments of the present invention and combines with the drawings to elaborate in detail as follows. The specific implementation manners of the present invention are given in detail by the following embodiments and their drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention, and constitute a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0020] Figure 1 is a three-dimensional structural schematic diagram of a financial document destruction device proposed by the present invention;

[0021] Figure 2 is a front sectional three-dimensional structural schematic diagram of a financial document destruction device proposed by the present invention;

[0022] Figure 3 is a side sectional three-dimensional structural schematic diagram of the crushing cylinder;

[0023] Figure 4 is Figure 3 a partial enlarged structural schematic diagram of A in

[0024] Figure 5 a structural schematic diagram between the third rotating shaft and the strip-shaped air outlet plate;

[0025] Figure 6 a structural schematic diagram of the strip-shaped air outlet plate and the moving block;

[0026] Figure 7 a side unfolded structural schematic diagram of the third rotating shaft;

[0027] Figure 8 a structural schematic diagram of the grid plate;

[0028] Figure 9 a top view structural schematic diagram of the primary crushing cavity in the crushing cylinder;

[0029] Figure 10 It is a schematic top view structure diagram of the secondary crushing cavity in the crushing cylinder.

[0030] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0031] 1. First bevel gear; 2. Second bevel gear; 3. Screw rod; 4. Ventilated mesh cylinder; 5. Annular pipe; 6. First air duct; 7. Extrusion cylinder; 8. Humidifier; 9. Second connecting pipe; 10. First connecting pipe; 11. Base plate; 12. First rotating shaft; 13. Third bevel gear; 14. Fourth bevel gear; 15. Fifth bevel gear; 16. Sixth bevel gear; 17. Second rotating shaft; 18. Crushing cylinder; 19. Baffle plate; 20. Pulling plate; 21. Second air duct; 22. Third air duct; 23. First Laval nozzle; 24. Third rotating shaft; 25. Grid plate; 26. Second Laval nozzle; 27. Rotating cylinder; 28. Feeding channel; 29. Motor; 30. Chassis; 31. Straight pipe; 32. Air pump; 33. Moving block; 34. Strip-shaped air outlet plate; 35. Secondary crushing cavity; 36. Primary crushing cavity; 37. Storage cavity; 38. Document to be crushed; 39. Extrusion plate; 40. Sliding rod; 41. Spring; 42. Fixed block; 43. Slide block; 44. Reciprocating chute. Detailed implementation manners

[0032] The principles and features of the present invention will be described below in conjunction with the attached drawings. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention. In the following paragraphs, the present invention will be described more specifically by way of example with reference to the attached drawings. It should be noted that the attached drawings are in very simplified forms and use non-precise scales, only for the purpose of conveniently and clearly assisting in explaining the embodiments of the present invention.

[0033] Please refer to Figures 1 to 10, in an embodiment of the present invention, a financial document destruction device includes a bottom plate 11. A pressing cylinder 7 is fixedly connected to the upper side of the bottom plate 11. The outlet end of the pressing cylinder 7 is arranged with a gradually decreasing diameter. A screw rod 3 is rotatably connected inside the pressing cylinder 7. A breathable mesh cylinder 4 is fixedly connected to the upper side of the pressing cylinder 7. The bottom end of the breathable mesh cylinder 4 is communicated with the inside of the pressing cylinder 7. The upper end of the breathable mesh cylinder 4 is fixedly connected to a crushing cylinder 18. Inside the crushing cylinder 18, a storage cavity 37, a primary crushing cavity 36, and a secondary crushing cavity 35 are arranged in sequence from top to bottom. A feed channel 28 is opened on the bottom side wall of the storage cavity 37. The storage cavity 37 is communicated with the primary crushing cavity 36 through the feed channel 28. A baffle 19 is slidably connected through the side wall of the storage cavity 37. One end of the baffle 19 is fixedly connected to a pull plate 20. A rotating cylinder 27 is rotatably connected inside the storage cavity 37. Anti-slip lines are provided on the outer side wall of the rotating cylinder 27. The rotating cylinder 27 is made of rubber material. A second rotating shaft 17 is fixedly connected through the center of the rotating cylinder 27. The two ends of the second rotating shaft 17 respectively penetrate through the two side walls of the storage cavity 37. A pressing device is arranged on one side of the rotating cylinder 27;

[0034] Please refer to Figure 3 , the pressing device includes a sliding rod 40. The sliding rod 40 penetrates through the side wall of the storage cavity 37. One end of the sliding rod 40 is fixedly connected to a pressing plate 39. The other end of a spring 41 is fixedly connected to a fixed block 42. The spring 41 is sleeved on the sliding rod 40. The two ends of the spring 41 are respectively fixedly connected to the fixed block 42 and the side wall of the crushing cylinder 18. Under the action of the spring 41, the pressing plate 39 can clamp the document to be crushed 38 between the rotating cylinder 27 and the pressing plate 39;

[0035] A chassis 30 is fixedly connected to the side wall of the crushing cylinder 18. A motor 29 is fixedly connected to the side wall of the chassis 30. The output shaft of the motor 29 is fixedly connected to one end of the second rotating shaft 17. A sixth bevel gear 16 is fixedly connected to one end of the second rotating shaft 17. A fifth bevel gear 15 is meshed and connected to the side wall of the sixth bevel gear 16. A first rotating shaft 12 is fixedly connected to the side wall of the fifth bevel gear 15. The bottom end of the first rotating shaft 12 is rotatably connected to the upper side of the bottom plate 11. One end of the screw rod 3 extending out of the pressing cylinder 7 is fixedly connected to a second bevel gear 2. The second bevel gear 2 is meshed and connected to a first bevel gear 1. The first bevel gear 1 is fixedly connected to the first rotating shaft 12.

[0036] Straight pipes 31 are respectively fixedly connected to the two side walls of the primary crushing cavity 36. A plurality of second Laval nozzles 26 are arranged on the opposite sides of the two straight pipes 31. A grid plate 25 is fixedly connected to the inner side wall of the second Laval nozzle 26. An air back-blowing device is arranged on the bottom side of the grid plate 25;

[0037] Please refer to Figure 2 , Figure 4 , Figure 5 , Figure 6 andFigure 7 The back-blowing device includes a third rotating shaft 24 which is rotatably connected between the two side walls of the primary crushing chamber 36. One end of the third rotating shaft 24 extends out of the crushing cylinder 18 and is fixedly connected with a third bevel gear 13. A fourth bevel gear 14 is fixedly connected to the side wall of the third bevel gear 13, and the fourth bevel gear 14 is fixedly connected to the first rotating shaft 12. A reciprocating chute 44 is formed in the side wall of the third rotating shaft 24. A moving block 33 is slidably connected to the third rotating shaft 24. A through hole is formed in the moving block 33, and the moving block 33 is slidably connected to the third rotating shaft 24 through the through hole. A slider 43 is fixedly connected to the through hole in the moving block 33. One end of the slider 43 extends into the reciprocating chute 44. The reciprocating chute 44 is arranged in a rhombic strip shape. A strip-shaped air outlet plate 34 is fixedly connected to the upper side of the moving block 33. The upper side outlet of the strip-shaped air outlet plate 34 abuts against the bottom side wall of the grid plate 25. A second air duct 21 is fixedly connected to the side wall of the strip-shaped air outlet plate 34. The second air duct 21 penetrates through the side wall of the crushing cylinder 18 and is connected to the first connecting pipe 10. When the first rotating shaft 12 rotates, the first rotating shaft 12 can drive the third rotating shaft 24 to rotate through the fourth bevel gear 14 and the third bevel gear 13. When the third rotating shaft 24 rotates, the slider 43 in the moving block 33 can slide along the reciprocating chute 44. The slider 43 sliding along the reciprocating chute 44 can drive the moving block 33 to move left and right on the third rotating shaft 24, thereby driving the strip-shaped air outlet plate 34 to move left and right under the grid plate 25. The air flow generated by the first connecting pipe 10 can enter the strip-shaped air outlet plate 34 through the second air duct 21. The air flow generated by the strip-shaped air outlet plate 34 can blow upward from the bottom of the grid plate 25. The upward back-blowing air flow can make the larger paper scraps that have not passed through the grid plate 25 re-enter the two rows of oppositely arranged supersonic air flows for shredding.

[0038] An air pump 32 is fixedly connected to the upper side of the bottom plate 11. The output end of the air pump 32 is fixedly connected with a first connecting pipe 10. Two third air ducts 22 are fixedly connected to the side wall of the first connecting pipe 10. The two third air ducts 22 are respectively communicated with the two straight pipes 31. A secondary crushing and humidifying device is arranged in the secondary crushing chamber 35;

[0039] Please refer to Figure 2 、 Figure 3 and Figure 10, the secondary crushing and humidifying device includes an annular pipe 5, the annular pipe 5 is fixedly connected to the outer bottom wall of the crushing cylinder 18, first Laval nozzles 23 are provided around the inner periphery of the secondary crushing cavity 35, and the four first Laval nozzles 23 are all connected to the annular pipe 5. A second connecting pipe 9 is fixedly connected to the side wall of the first connecting pipe 10, and the second connecting pipe 9 is connected to the annular pipe 5 through a first air duct 6. A humidifier 8 is fixedly connected to the upper side of the bottom plate 11, and the output end of the humidifier 8 is connected to the second connecting pipe 9. When the air flow of the air pump 32 enters the second connecting pipe 9, the humidifier 8 generates water mist which can be mixed with the air flow in the second connecting pipe 9, and is sprayed out from the four first Laval nozzles 23 through the first air duct 6 and the annular pipe 5.

[0040] The working principle of the present invention is:

[0041] During use, first, the baffle 19 can be pulled to open the top of the storage cavity 37, and then the document to be crushed 38 can be placed between the rotating cylinder 27 and the pressing plate 39. Under the action of the spring 41, the pressing plate 39 can clamp the document to be crushed 38 between the rotating cylinder 27 and the pressing plate 39. At this time, the feeding channel 28 is located below the position where the document to be crushed 38 is in contact with the rotating cylinder 27. Then, the baffle 19 is pushed to block the top opening of the storage cavity 37. After that, the motor 29 is started to drive the second rotating shaft 17 to rotate. The rotation of the second rotating shaft 17 can drive the rotating cylinder 27 to rotate. The rotation of the rotating cylinder 27 can continuously convey the documents to be crushed 38 downward into the feeding channel 28 one by one, so that the documents to be crushed 38 can continuously and automatically enter the primary crushing cavity 36;

[0042] At the same time, the air pump 32 and the humidifier 8 are started. The air flow generated by the air pump 32 can enter the two straight pipes 31 through the third air duct 22. The air flow is then sprayed out from the multiple second Laval nozzles 26 on the side walls of the straight pipes 31. The supersonic air flow is formed through the Laval nozzles and injected into the primary crushing cavity 36. The multiple second Laval nozzles 26 are arranged in two rows opposite to each other. When the paper enters the primary crushing cavity 36, the paper will be fully torn and crushed by the two rows of opposite supersonic air flows, forming small pieces of debris. The debris can fall through the grid plate 25 into the secondary crushing cavity 35;

[0043] When the air flow of the air pump 32 enters the second connecting pipe 9, the humidifier 8 generates water mist that can be mixed with the air flow in the second connecting pipe 9, and is ejected from the four first Laval nozzles 23 through the first air duct 6 and the annular pipe 5. The ejected water mist air flow can not only further crush the small debris in the secondary crushing chamber 35, but also make the debris contain a small amount of moisture, facilitating the adhesion of the debris to each other. After that, the debris falls into the extrusion cylinder 7 through the breathable mesh cylinder 4. While the second rotating shaft 17 rotates, the second rotating shaft 17 can drive the first rotating shaft 12 to rotate through the sixth bevel gear 16 and the fifth bevel gear 15. The rotation of the first rotating shaft 12 drives the screw rod 3 to rotate through the first bevel gear 1 and the second bevel gear 2. The rotation of the screw rod 3 can compress and convey a large amount of paper debris, and finally discharge the compressed paper debris from the outlet of the extrusion cylinder 7 for easy collection.

[0044] The above is only the preferred embodiment of the present invention, and it is not intended to limit the present invention in any form; any ordinary technician in the industry can smoothly implement the present invention according to the description in the accompanying drawings and the above description; however, any equivalent changes, such as slight modifications, evolutions made by those skilled in the art within the scope of the technical solution of the present invention using the technical content disclosed above, are equivalent embodiments of the present invention; at the same time, any equivalent changes, such as modifications, evolutions made to the above embodiments based on the essence of the present invention, still fall within the protection scope of the technical solution of the present invention.

Claims

1. A financial document destruction device, comprising a bottom plate (11), characterized in that: The upper side of the bottom plate (11) is fixedly connected to an extrusion cylinder (7), the interior of the extrusion cylinder (7) is rotatably connected to a spiral rod (3), the upper side of the extrusion cylinder (7) is fixedly connected to an air-permeable mesh cylinder (4), the bottom end of the air-permeable mesh cylinder (4) is connected to the interior of the extrusion cylinder (7), the upper end of the air-permeable mesh cylinder (4) is fixedly connected to a pulverizing cylinder (18), and the interior of the pulverizing cylinder (18) is provided with a storage chamber (37), a primary pulverizing chamber (36), a secondary pulverizing chamber (37) and a secondary pulverizing chamber (36) in sequence from top to bottom. A crushing chamber (35), a feeding channel (28) is provided on the bottom side wall of the material storage chamber (37), the material storage chamber (37) is connected with the primary crushing chamber (36) through the feeding channel (28), a rotating drum (27) is rotatably connected in the material storage chamber (37), a second rotating shaft (17) is fixedly connected to the center of the rotating drum (27), two ends of the second rotating shaft (17) respectively penetrate the two side walls of the material storage chamber (37), and a pushing device is provided on one side of the rotating drum (27); A case (30) is fixedly connected to the side wall of the crushing cylinder (18), a motor (29) is fixedly connected to the side wall of the case (30), an output shaft of the motor (29) is fixedly connected to one end of a second rotating shaft (17), one end of the second rotating shaft (17) is fixedly connected to a sixth bevel gear (16), a fifth bevel gear (15) is meshedly connected to the side wall of the sixth bevel gear (16), a first rotating shaft (12) is fixedly connected to the side wall of the fifth bevel gear (15), a bottom end of the first rotating shaft (12) is rotatably connected to the upper side of the bottom plate (11), an end of the spiral rod (3) extending out of the extrusion cylinder (7) is fixedly connected to a second bevel gear (2), the second bevel gear (2) is meshedly connected to the first bevel gear (1), and the first bevel gear (1) is fixedly connected to the first rotating shaft (12); The side walls of the primary pulverizing chamber (36) are respectively fixedly connected with straight tubes (31); a plurality of second Laval nozzles (26) are provided on opposite sides of the two straight tubes (31); a mesh plate (25) is fixedly connected to the inner wall of the second Laval nozzle (26); a back-blowing device is provided on the bottom side of the mesh plate (25); an air pump (32) is fixedly connected to the upper side of the bottom plate (11); a first connecting tube (10) is fixedly connected to the output end of the air pump (32); two third air guide tubes (22) are fixedly connected to the side wall of the first connecting tube (10); the two third air guide tubes (22) are respectively connected to the two straight tubes (31); and a secondary pulverizing humidifying device is provided in the secondary pulverizing chamber (35).

2. A financial document destruction device according to claim 1, characterized in that: The pushing device comprises a sliding rod (40), the sliding rod (40) passes through the side wall of the material storage chamber (37), one end of the sliding rod (40) is fixedly connected to the extrusion plate (39), the other end of the spring (41) is fixedly connected to the fixed block (42), the sliding rod (40) is sleeved with the spring (41), and the two ends of the spring (41) are respectively fixedly connected to the fixed block (42) and the side wall of the crushing cylinder (18).

3. A financial document destruction device according to claim 2, characterized in that: A baffle (19) is slidably connected to the side wall of the material storage cavity (37), and a pull plate (20) is fixedly connected to one end of the baffle (19).

4. A financial document destruction device according to claim 3, characterized in that: The back-blowing device comprises a third rotating shaft (24), the third rotating shaft (24) is rotatably connected between the two side walls of the primary crushing chamber (36), one end of the third rotating shaft (24) extends out of the crushing barrel (18) and is fixedly connected to a third bevel gear (13), a fourth bevel gear (14) is fixedly connected to the side wall of the third bevel gear (13), the fourth bevel gear (14) is fixedly connected to the first rotating shaft (12), a reciprocating slide groove (44) is provided on the side wall of the third rotating shaft (24), a moving block (33) is slidably connected to the third rotating shaft (24), and a moving block (33) is provided on the moving block (33). A through hole is provided, and the moving block (33) is slidably connected to the third rotating shaft (24) through the through hole. A slider (43) is fixedly connected to the through hole in the moving block (33), and one end of the slider (43) extends into the reciprocating slide groove (44). A strip air outlet plate (34) is fixedly connected to the upper side of the moving block (33), and the upper outlet of the strip air outlet plate (34) abuts against the bottom side wall of the grid plate (25). A second air guide pipe (21) is fixedly connected to the side wall of the strip air outlet plate (34), and the second air guide pipe (21) passes through the side wall of the pulverizing cylinder (18) and is connected to the first connecting pipe (10).

5. A financial document destruction device according to claim 4, characterized in that: The reciprocating slide groove (44) is arranged in a rhombus strip shape.

6. A financial document destruction device according to claim 5, characterized in that: The secondary crushing and humidifying device comprises an annular tube (5), the annular tube (5) being fixedly connected to the outer side wall of the bottom of the crushing cylinder (18), first Laval nozzles (23) being arranged around the inside of the secondary crushing chamber (35), the four first Laval nozzles (23) being connected to the annular tube (5), a second connecting tube (9) being fixedly connected to the side wall of the first connecting tube (10), the second connecting tube (9) being connected to the annular tube (5) via a first air guide tube (6), a humidifier (8) being fixedly connected to the upper side of the bottom plate (11), the output end of the humidifier (8) being connected to the second connecting tube (9).

7. A financial document destruction device according to claim 6, characterized in that: The outlet end of the extrusion cylinder (7) is arranged in a shape in which the diameter gradually decreases.

8. A financial document destruction device according to claim 7, characterized in that: The outer side wall of the rotating drum (27) is provided with anti-slip grooves.

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