A shredding apparatus for destroying confidential paper

Abstract

The utility model relates to paper medium crushing technical field of destruction center, concretely is a kind of for destroying classified paper shredding equipment, including horizontal interval distribution's first-stage crusher and second-stage crusher, the discharge outlet of first-stage crusher is set with second-stage feeding belt between the feeding port of second-stage crusher, second-stage feeding belt is provided with fire alarm component in the connection place of first-stage crusher, the classified paper shredding equipment for destroying classified paper is destroyed effect and the destruction processing quantity is big;Subsection integral cutter has the advantages such as big strength, small assembling error, when blade unit wears or the situation such as cutter head breaks, cutter body is not lysed, does not affect to continue to use, when tool is seriously broken, only need to replace the blade group that appears problem, and do not need to replace entire subsection integral cutter group, maintenance cost is low;Equipment height is low, can adapt to with a large number of places, and it is convenient to maintain;Equipment has fire alarm function, effectively prevent the occurrence of fire.

Description

Technical Field

[0001] This utility model relates to the field of paper media shredding technology in destruction centers, specifically a shredding device for destroying confidential paper. Background Technology

[0002] Currently available paper destruction equipment has relatively low processing capacity and efficiency, failing to meet destruction requirements. Most products on the market use single-blade assemblies, resulting in low blade strength, rapid wear, and the potential for individual blade failure to detach and damage other blades. Therefore, a shredding device with high destruction efficiency and processing capacity is designed. This device features a segmented, integral blade assembly with high strength, minimal assembly error, and the ability to maintain its function even when blade units wear down or the blade head breaks. In cases of severe blade breakage, only the faulty blade assembly needs replacement, eliminating the need to replace the entire segmented, integral blade assembly, thus reducing maintenance costs. The device is also low-profile, adaptable to various locations, and easy to maintain. Furthermore, it has a fire alarm function to effectively prevent fires. This shredding equipment is designed for destroying confidential paper. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this utility model provides a shredding device for destroying confidential paper, offering high shredding efficiency and processing capacity. The segmented integral blades feature high strength and minimal assembly error. Even when blade units wear down or the blade head breaks, the blade body does not disintegrate, ensuring continued use. In cases of severe blade breakage, only the faulty blade assembly needs replacement, eliminating the need to replace the entire segmented integral blade assembly, resulting in low maintenance costs. The device has a low profile, making it suitable for various locations and facilitating maintenance. Furthermore, the device includes a fire alarm function, effectively preventing fires.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model provides the following technical solution: a shredding device for destroying confidential paper, comprising a primary shredder and a secondary shredder horizontally spaced apart, a secondary feeding belt being provided between the discharge port of the primary shredder and the feed port of the secondary shredder, a fire alarm component being provided at the connection between the secondary feeding belt and the primary shredder, and a magnetic separation conveyor belt being provided above the secondary feeding belt.

[0007] Preferably, the secondary crusher includes a secondary crushing frame with two crushing blade groups rotatably connected in parallel at the center. The two crushing blade groups are respectively designated as crushing blade group one and crushing blade group two. Both crushing blade group one and crushing blade group two include a spline shaft. The spline shaft has a guide sleeve with multiple integral blade groups. The integral blade groups include multiple blades fixed as one piece. Both ends of the multiple integral blade groups are locked to the spline shaft by lock nuts.

[0008] Preferably, the secondary crushing frame includes two sets of bearing side plates and two sets of vertical plates fixedly connected in a ring. Bearings are installed on both sides of the spline shaft. Bearing sleeves that are rotatably connected to the bearings are fixedly installed on the bearing side plates. Two grates are fixedly connected between the two bearing side plates and are respectively located on both sides of the two crushing blade sets.

[0009] Preferably, the bearing includes a deep groove ball bearing and a tapered roller bearing that have a rotatable sliding fit with the bearing sleeve.

[0010] Preferably, a two-stage crushing motor is fixedly installed on the outer side of each of the two upright plates. The output shaft of the two-stage crushing motor on the same side is connected to the crushing blade assembly via a sprocket and chain drive. A transmission assembly is provided between the two crushing blade assemblies. The transmission assembly includes two synchronous gears that are fixedly installed on the two crushing blade assemblies respectively, and the two synchronous gears mesh with each other.

[0011] Preferably, it also includes a primary feeding belt for feeding the primary crusher, and the front end of the primary feeding belt also includes a storage belt.

[0012] Preferably, one end of the magnetic separation conveyor belt is also equipped with an iron impurity tailings box.

[0013] Preferably, it also includes an electrical control cabinet, wherein the storage belt, the primary feeding belt, the primary crusher, the secondary feeding belt, the secondary crusher, and the magnetic separation conveyor belt are all electrically connected to the electrical control cabinet.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, this utility model provides a shredding device for destroying confidential paper, which has the following beneficial effects:

[0016] This shredding equipment for destroying confidential paper boasts high destruction efficiency and processing capacity. Its segmented, integral blades offer high strength and minimal assembly error. Even when blade units wear down or the blade head breaks, the blade body does not disintegrate, allowing for continued use. In cases of severe blade breakage, only the faulty blade assembly needs replacement, eliminating the need to replace the entire segmented, integral blade assembly, resulting in low maintenance costs. The equipment's low profile allows it to be used in various locations and facilitates maintenance. It features a fire alarm function to effectively prevent fires and meets the needs of large-scale paper destruction in destruction centers. Employing a two-stage distributed shredder core arrangement, it can destroy no less than 5 tons per hour, achieving the secondary destruction technical requirements for paper media in BMB21-2019 "Security and Confidentiality Requirements for the Destruction and Elimination of Carriers Involving State Secrets." Furthermore, it can be linked with a 6-ton fully automatic baler at the back end. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the front structure of this utility model;

[0018] Figure 2 This is a top view of the overall structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the magnetic roller and the upper drive roller of this utility model.

[0020] Figure 4 This is a schematic diagram of the structure of the two-stage pulverizer of this utility model;

[0021] Figure 5 This is a schematic diagram of the disassembled structure of the two-stage pulverizer of this utility model;

[0022] Figure 6 This is a structural schematic diagram of the disassembled shredder assembly of this utility model.

[0023] The attached diagram is labeled as follows: 1. Primary crusher; 2. Secondary crusher; 3. Secondary feeding belt; 4. Magnetic separator conveyor belt; 5. Magnetic roller; 6. Upper drive roller; 7. Crushing blade assembly one; 8. Crushing blade assembly two; 9. Splined shaft; 10. Integral blade assembly; 11. Lock nut; 12. Bearing side plate; 13. Vertical plate; 14. Bearing sleeve; 15. Deep groove ball bearing; 16. Tapered roller bearing; 17. Grate; 18. Secondary crushing motor; 19. Sprocket and chain; 20. Synchronous gear; 21. Primary feeding belt; 22. Storage belt; 23. Iron impurity tailings bin; 24. Electrical control cabinet. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example:

[0026] Please see Figure 1-6 A shredding device for destroying confidential paper includes a primary shredder 1 and a secondary shredder 2 horizontally spaced. A secondary feeding belt 3 is installed between the discharge port of the primary shredder 1 and the feed port of the secondary shredder 2. A fire alarm component is installed at the connection between the secondary feeding belt 3 and the primary shredder 1. A magnetic separation conveyor belt 4 is installed above the secondary feeding belt 3. The magnetic separation conveyor belt 4 is driven and supported by magnetic rollers 5 and is equipped with a magnetic separation drive motor to drive the magnetic rollers 5 to rotate. The secondary feeding belt 3 is driven and supported by an upper driving roller 6, a lower driven roller, and a guide roller, and is equipped with a secondary feeding motor to drive the driving roller to rotate. The magnetic separation conveyor belt 4 is used to prevent iron media such as dovetail clips from entering the secondary shredder 2 and damaging the blades. The magnetic separation belt uses magnetic rollers 5 to recover iron media sandwiched in the paper and prevent them from entering the secondary shredder 2 and damaging the blades. When the iron media is conveyed on the secondary feeding belt 3 and passes through the magnetic rollers 5, it is attracted and then conveyed to the iron impurity tailings box 23 by the rotation of the magnetic separation belt 4.

[0027] The primary shredder 1 shreds the paper into strips 40mm wide, reducing the pressure of the secondary shredder and destroying paper storage media and embedded metal items such as small dovetail clips. Primary shredder 1 is a conventional technique in this field and will not be described in detail here. Secondary shredder 2 further shreds the particles from the primary shredder to meet secondary standards, thus completing the paper destruction. A baling machine can be connected at the rear to collect the media.

[0028] This shredding equipment for destroying confidential paper meets the needs of the destruction center for large-scale paper destruction. It adopts a two-stage distributed shredder core arrangement, with a destruction capacity of no less than 5 tons per hour. The destruction effect meets the technical requirements for secondary destruction of paper media in BMB21-2019 "Security and Confidentiality Requirements for the Destruction and Information Elimination of Carriers Involving State Secrets". Furthermore, it can be linked with a 6-ton fully automatic baler at the back end.

[0029] Specifically, the secondary crusher 2 includes a secondary crushing frame with two crushing blade groups rotatably connected in parallel at the center. The two crushing blade groups are respectively designated as crushing blade group one 7 and crushing blade group two 8. Both crushing blade group one 7 and crushing blade group two 8 include a splined shaft 9. The splined shaft 9 has a guide sleeve with multiple integral blade groups 10. Each integral blade group 10 includes multiple blades fixed as one piece. Both ends of the integral blade group 10 are locked to the splined shaft 9 by lock nuts 11. The use of segmented integral blade groups reduces the cumulative error of the blades during equipment assembly, the blade strength is better than that of single blades, and the number of times parts can be replaced is reduced. The inconsistent helical tangents of adjacent blades make it easier to cut materials. Because the blades are segmented integral blades, the blades are strong and can crush more particles at one time, thereby increasing the output of the equipment. When the blade unit wears or the blade head breaks, the blade body does not disintegrate and does not affect continued use. When the blade is severely broken, only the problematic blade group needs to be replaced, without replacing the entire segmented integral blade group, which greatly reduces maintenance costs.

[0030] Specifically, the secondary crushing frame includes two sets of bearing side plates 12 and two sets of vertical plates 13 fixedly connected in a ring. Bearings are installed on both sides of the spline shaft 9. Bearing sleeves 14 that are rotatably connected to the bearings are fixedly installed on the bearing side plates 12. Two grates 17, which are respectively located on both sides of the two crushing blade groups, are fixedly connected between the two bearing side plates 12. The blades are locked by lock nuts 11. The bearing sleeves 14 and the bearings are installed on the bearing side plates 12 for easy equipment maintenance.

[0031] Specifically, the bearing includes a deep groove ball bearing 15 and a tapered roller bearing 16 that are rotatably and slidingly fitted with the bearing sleeve 14.

[0032] Specifically, a secondary crushing motor 18 is fixedly installed on the outer side of each of the two upright plates 13. The output shaft of the secondary crushing motor 18 on the same side is connected to the crushing blade assembly via a sprocket and chain 19. A transmission assembly is provided between the two crushing blade assemblies. The transmission assembly includes two synchronous gears 20 fixedly installed on the two crushing blade assemblies respectively. The two synchronous gears 20 mesh with each other. When the secondary crushing motor 18 is started, the two crushing blades are rotated inside the screen through the transmission connection of the sprocket and chain 19 and the synchronous gears 20, thereby performing the crushing operation.

[0033] Specifically, it also includes a primary feeding belt 21 that supplies material to the primary crusher 1. The front end of the primary feeding belt 21 also includes a storage belt 22. The storage belt 22 stores the material, allowing it to be fed slowly to reduce the pressure of the primary crushing and prevent the equipment from stalling or stopping, keeping it in an active state. The primary feeding belt 21 receives material from the storage belt 22 and conveys it into the primary crusher 1.

[0034] Specifically, one end of the magnetic separation conveyor belt 4 is also equipped with an iron impurity tailing box 23 to facilitate the receipt of iron media magnetically attracted from the magnetic separation conveyor belt 4.

[0035] Specifically, it also includes an electrical control cabinet 24, and the storage belt 22, the primary feeding belt 21, the primary crusher 1, the secondary feeding belt 3, the secondary crusher 2, and the magnetic separation conveyor belt 4 are all electrically connected to the electrical control cabinet 24.

[0036] Working process: The material is placed in the storage belt 22 and then conveyed to the primary feeding belt 21 and then to the primary crusher 1 for primary crushing. The particles after primary crushing are fed into the secondary crusher 2 via the secondary feeding belt 3 to reach the secondary standard. Since there is a magnetic separation conveyor belt 4 above the secondary feeding belt 3, iron media will be attracted when it is conveyed on the secondary feeding belt 3 and passes through the magnetic roller 5. After being attracted, the magnetic separation belt 4 rotates and conveys it to the iron impurity tail box 23 to prevent iron media such as dovetail clips from entering the secondary crusher and damaging the blades.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A shredding device for destroying confidential paper, characterized in that: It includes a primary crusher (1) and a secondary crusher (2) arranged horizontally at intervals. A secondary feeding belt (3) is provided between the discharge port of the primary crusher (1) and the feeding port of the secondary crusher (2). A fire alarm component is provided at the connection between the secondary feeding belt (3) and the primary crusher (1). A magnetic separation conveyor belt (4) is provided above the secondary feeding belt (3).

2. The shredding equipment for destroying confidential paper according to claim 1, characterized in that: The secondary crusher (2) includes a secondary crushing frame with two crushing blade groups connected in parallel and symmetrical rotation in the middle. The two crushing blade groups are respectively set as crushing blade group one (7) and crushing blade group two (8). Both crushing blade group one (7) and crushing blade group two (8) include a spline shaft (9). The spline shaft (9) has a multi-segment integral blade group (10) on the guide sleeve. The integral blade group (10) includes multiple blades fixed as one piece. Both ends of the multi-segment integral blade group (10) are locked to the spline shaft (9) by lock nuts (11).

3. The shredding equipment for destroying confidential paper according to claim 2, characterized in that: The secondary crushing frame includes two sets of bearing side plates (12) and two sets of vertical plates (13) fixedly connected in a ring. Bearings are installed on both sides of the spline shaft (9). Bearing sleeves (14) that are rotatably connected to the bearings are fixedly installed on the bearing side plates (12). Two grates (17) respectively located on both sides of the two crushing blade groups are fixedly connected between the two bearing side plates (12).

4. The shredding device for destroying confidential paper according to claim 3, characterized in that: The bearings include a deep groove ball bearing (15) and a tapered roller bearing (16) that are rotatably and slidingly fitted with the bearing sleeve (14).

5. The shredding device for destroying confidential paper according to claim 4, characterized in that: Two secondary crushing motors (18) are fixedly installed on the outer sides of the two upright plates (13). The output shaft of the secondary crushing motor (18) on the same side is connected to the crushing blade group through a sprocket chain (19). A transmission assembly is provided between the two crushing blade groups. The transmission assembly includes two synchronous gears (20) that are fixedly installed on the two crushing blade groups respectively, and the two synchronous gears (20) mesh with each other.

6. The shredding device for destroying confidential paper according to claim 5, characterized in that: It also includes a primary feeding belt (21) for feeding the primary crusher (1), and the front end of the primary feeding belt (21) also includes a storage belt (22).

7. The shredding device for destroying confidential paper according to claim 6, characterized in that: One end of the magnetic separation conveyor belt (4) is also equipped with an iron impurity tailings box (23).

8. The shredding device for destroying confidential paper according to claim 7, characterized in that: It also includes an electrical control cabinet (24), and the storage belt (22), the primary feeding belt (21), the primary crusher (1), the secondary feeding belt (3), the secondary crusher (2) and the magnetic separation conveyor belt (4) are all electrically connected to the electrical control cabinet (24).

Images