A small storage medium destruction machine

Abstract

The present invention provides a small storage medium destruction machine, which includes a frame. The coarse material processing device is installed on the frame and includes: a coarse crushing device for performing primary crushing on the storage medium, and a screening device for continuously screening the material obtained after primary crushing; the fine material processing device is installed on the frame and includes: a material magnetic separation device for performing magnetic separation on the fine material obtained after continuous screening, a fine material crushing device for performing secondary crushing on the non-magnetic material obtained after magnetic separation, and an aggregate device for collecting the material obtained after secondary crushing. The present invention can destroy waste storage media with data that cannot be leaked by means of physical crushing and process them into debris; through the unique two-stage crushing of screening and sorting in the present invention, the crushing efficiency can be greatly improved while the crushing noise is reduced, and the power of the motor is reduced under the action of the adjustable gate and the material separator, greatly reducing the volume and weight of the equipment.

Description

Technical Field

[0001] The present invention belongs to the technical field of data storage medium destruction, and particularly relates to a small storage medium destruction machine. Background Art

[0002] During office activities, waste storage media are formed, and the data inside that cannot be leaked commercially or personally needs to be destroyed. Since waste storage media are relatively hard, ordinary crushers cannot crush them, and destruction methods such as using a hammer to hit or a drill to drill are unreliable; if they are transported to a large crusher for crushing after being centralized, there are risks such as leakage of secrets in the intermediate links and it is very inconvenient.

[0003] Therefore, designing a small crusher that can physically crush relatively hard data storage objects such as mechanical storage media into the desired particle size (destruction requirements) in an office environment is a technical problem that those skilled in the art urgently need to solve. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: to provide a small storage medium destruction machine that can effectively destroy waste storage media, and the overall structure is more miniaturized, meeting the requirements of daily storage medium destruction for general household and commercial use.

[0005] The present invention is implemented as follows: A small storage medium destruction machine includes a frame. The small storage medium destruction machine further includes:

[0006] A coarse material processing device, which is installed on the frame and includes:

[0007] A coarse crushing device for performing primary crushing on the storage medium,

[0008] A screening device for continuously screening the material obtained after primary crushing;

[0009] A fine material processing device, which is installed on the frame and includes:

[0010] A material magnetic separation device for performing magnetic separation on the fine material obtained after continuous screening,

[0011] A fine material crushing device for performing secondary crushing on the non-magnetic material obtained after magnetic separation,

[0012] An aggregate device for collecting the material obtained after secondary crushing.

[0013] Further, the coarse crushing device includes:

[0014] A crusher housing, which is fixedly installed;

[0015] The moving cutter shaft, and two moving cutter shafts are rotatably installed in parallel inside the crusher housing;

[0016] The crushing power device, and two crushing power devices are installed outside the crusher housing and are connected to the moving cutter shafts one by one;

[0017] The moving cutter, and an odd number of moving cutters are installed on one of the moving cutter shafts, and an even number of moving cutters are installed on the other moving cutter shaft; The moving cutters on the two moving cutter shafts are arranged staggeredly and form partial overlaps;

[0018] The regulating gate mechanism, and two regulating gate mechanisms are installed on the crusher housing, and it has two comb-shaped gates that can swing around an axis. One of the comb-shaped gates is provided with odd slots that cooperate with an odd number of moving cutters, and the other comb-shaped gate is provided with even slots that cooperate with an even number of moving cutters;

[0019] The crushing discharge hopper is fixedly installed, the top opening thereof is located below the overlapping part of the moving cutters, and the bottom opening extends to the upper side of the feeding side of the screening device on one side.

[0020] Furthermore, the regulating gate mechanism includes:

[0021] The gate shaft, and two gate shafts are rotatably installed on the crusher housing and are installed corresponding to the comb-shaped gates one by one;

[0022] The actuating member, and at least one actuating member is installed on the gate shaft;

[0023] The pulling member, and at least two pulling members are provided. One end thereof is connected to the crusher housing, and the other end is connected to the end of the corresponding actuating member.

[0024] Furthermore, the pulling member is a spring or an electric push rod.

[0025] Furthermore, the screening device includes:

[0026] The fixed ring is fixedly installed, the bottom thereof is provided with a feed inlet, the top thereof is provided with a discharge outlet, and the inner side thereof is provided with an annular baffle;

[0027] The drum sieve is coaxially sleeved on the outer periphery of the fixed ring, the outer side thereof is provided with a baffle, and the inner circular surface thereof is provided with a plurality of material deflecting plates, and a material annular cavity is formed between the two;

[0028] The screening power device is fixedly installed and drives the drum sieve to rotate;

[0029] The feed hopper, the top side of which extends to the lower side of the discharge outlet, and the bottom thereof is located above the feeding side of the coarse crushing device.

[0030] Furthermore, the material magnetic separation device includes:

[0031] A conveyor belt, which has a low-level horizontal part, an inclined part, and a high-level horizontal part arranged along the conveying direction. The low-level horizontal part is located below the discharge side of the screening device.

[0032] A magnetic attraction device, which is fixedly installed inside the high-level horizontal part.

[0033] Furthermore, the coarse material processing device further includes: an intermediate aggregate device, and the intermediate aggregate device includes:

[0034] A transition funnel, which is arranged between the low-level horizontal part of the conveyor belt and the discharge side of the screening device;

[0035] A funnel gate, which is movably installed at the bottom of the transition funnel;

[0036] An aggregate box, which is fixedly installed below the low-level horizontal part of the conveyor belt.

[0037] Furthermore, the fine material crushing device includes:

[0038] A fine crushing funnel, which is fixedly installed below the discharge side of the material magnetic separation device;

[0039] A fine crushing chamber, which is fixedly installed below the fine crushing funnel, and a crushing knife is arranged inside it;

[0040] A fine crushing motor, which is fixedly installed on the fine crushing chamber and drives the crushing knife to rotate.

[0041] Furthermore, a machine shell is also installed outside the frame. On the machine shell, there is a feeding port with a baffle, control buttons for controlling the coarse material processing device and the fine material processing device, and a display screen for displaying the operation data of the coarse material processing device and the fine material processing device.

[0042] Furthermore, the frame is divided into a first frame and a second frame that can be assembled. The machine shell is divided into a first machine shell and a second machine shell. The control buttons are divided into a first button and a second button. The display screen is divided into a first display screen and a second display screen;

[0043] The feeding port, the first button, and the first display screen are all installed on the first machine shell. The first machine shell and the coarse material processing device are all installed on the first frame;

[0044] The second button and the second display screen are all installed on the second machine shell. The second machine shell and the fine material processing device are all installed on the second frame.

[0045] The beneficial effects brought by the present invention are:

[0046] 1. The present invention is applicable to office environments and can destroy waste storage media with data that cannot be leaked through physical crushing during daily office work and process them into debris with a diameter of 1 to 16 mm. Through the unique two-stage crushing of screening and sorting in the present invention, the crushing efficiency can be greatly improved while reducing the crushing noise. With the action of the adjustable gate and the material sorting machine, the power of the motor is reduced, and the volume and weight of the equipment are greatly reduced. In particular, the unique assembly method makes the crusher very simple to move and deploy, making it suitable for use in office settings.

[0047] 2. The feeding side of the coarse crushing device of the present invention can greatly improve the crushing efficiency, significantly reduce the volume, weight, and power consumption of the equipment through the control of the open gate structure, and is particularly suitable for use in office settings.

[0048] 3. The material screening device in the present invention realizes the screening and conveying of the crushed material particles through the conveying method of the drum screen, with high screening efficiency, strong adaptability, simple structure, convenient adjustment, and can effectively prevent the screening holes from being blocked by the crushed particles.

[0049] 4. The material magnetic separation device in the present invention enables the fine crushing device to have a higher rotational speed, higher crushing efficiency, longer tool life, and lighter overall weight through magnetic separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 is a three-dimensional internal structure diagram of the small and medium-sized storage medium destroyer of the present invention;

[0051] Figure 2 is Figure 1 a three-dimensional structure diagram of the coarse material processing device in the shown small storage medium destroyer;

[0052] Figure 3 is Figure 2 a top view of the structure of the shown coarse material processing device;

[0053] Figure 4 is Figure 3 a sectional view of the structure in the A-A direction in

[0054] Figure 5 is Figure 2 a three-dimensional structure diagram of the coarse crushing device in the shown coarse material processing device;

[0055] Figure 6 is Figure 1 a three-dimensional structure diagram of the fine material processing device in the shown small storage medium destroyer;

[0056] Figure 7 is Figure 2 a three-dimensional structure diagram of the screening device in the shown coarse material processing device from a top view perspective;

[0057] Figure 8 For Figure 2 The three-dimensional structure diagram of the screening device in the coarse material processing device shown in the upward view

[0058] Figure 9 The three-dimensional structure diagram of the exterior of the small and medium-sized storage medium destruction machine of the present invention Specific embodiments

[0059] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention

[0060] As Figures 1 to 9 shown, a small storage medium destruction machine includes a frame 3, a coarse material processing device 1 and a fine material processing device 2

[0061] The coarse material processing device 1 is installed on the frame 3 and includes

[0062] A coarse crushing device 10 for performing primary crushing on the storage medium and a screening device 11 for continuously screening the material obtained after primary crushing

[0063] As Figures 2 to 5 shown, the coarse crushing device 10 includes a crusher housing 103, a moving knife shaft 113, a crushing power device, moving knives 102, an adjusting gate mechanism and a crushing discharge hopper 116. The crusher housing 103 is fixedly installed

[0064] Two moving knife shafts 113 are rotatably installed in parallel inside the crusher housing 103

[0065] Two crushing power devices are installed outside the crusher housing 103, and each includes a reduction gear 105 and a crushing motor 106. The main shaft of the crushing motor 106 is connected to the input shaft of the reduction gear 105, and the output shaft of the reduction gear 105 is connected to the corresponding moving knife shaft 113

[0066] An odd number of moving knives 102, such as 1, 3, or 5, are installed on one of the moving knife shafts 113, and an even number of moving knives 102, such as 2, 4, or 6, are installed on the other moving knife shaft 113. The moving knives 102 on the two moving knife shafts 113 are staggered and partially overlapped. The gap between the moving knives 102 is very small, so as to achieve the purpose of shear crushing

[0067] Two regulating gate mechanisms are installed on the crusher housing 103, each having two comb-shaped gates 112 that can swing around an axis. One of the comb-shaped gates 112 is provided with odd-numbered slots that cooperate with an odd number of moving blades 102, and the other comb-shaped gate 112 is provided with even-numbered slots that cooperate with an even number of moving blades 102. The regulating gate mechanism includes a gate shaft 118, a lever 119, and a tension member 114. Two gate shafts 118 are rotatably installed on the crusher housing 103 and are installed in one-to-one correspondence with the comb-shaped gates 112. Two levers 119 are installed on the gate shaft 118 and are respectively located at the shaft end positions. Four tension members 114 are provided, one end of which is connected to the crusher housing 103 and the other end is connected to the end of the corresponding lever 119. The tension member 114 is a spring or an electric push rod.

[0068] The teeth of the comb-shaped gate 112 are located between two moving blades 102 and are used to form an effective passage for the material to pass through. By adjusting the angle of the comb-shaped gate 112, the size of the effective passage is changed. The specific principle is as follows:

[0069] In the case of larger particles, the moving blade 102 pulls the particles into the overlapping area of the moving blades, and the particles automatically push open or use the electric push rod to push open the comb-shaped gate 112 to complete the crushing.

[0070] In the case of almost no particles or smaller particles, the comb-shaped gate 112 swings under the action of the tension member 114 or the electric push rod, causing the comb-shaped gate 112 to approach the outer edge of the opposite moving blade 102, making the coarse crushing area relatively small. The purpose is to prevent the particles from directly falling through the gap between the moving blades 102, thereby greatly improving the crushing efficiency.

[0071] The outer periphery of the moving blade 102 has a number of teeth. The distance from the root of the tooth to the center is less than the distance from the cutting edge to the center. When the moving blades 102 on the two moving blade shafts 113 rotate in opposite directions, the teeth move from top to bottom in the overlapping part. The material falls from above the middle of the crusher housing 103 between the two groups of moving blades 102 and is crushed under the rotating cutting action of the moving blades 102.

[0072] The crushing discharge hopper 116 is fixedly installed. Its top opening is located below the overlapping part of the moving blades 102, and its bottom opening extends to the upper side of the feeding side of the screening device 11.

[0073] To prevent larger material debris from getting stuck between the moving blades, a number of cleaners 117 are provided in the crusher housing 103 according to the number of moving blades 102. Each cleaner 117 is located in the gap between two moving blades 102, and the gap between its top and the outer cylindrical surface of the moving blade shaft 113 is very small, and the gap between its two sides and the side surface of the moving blade 102 is also very small. Thus, when the material debris gets stuck in the above position, it can be cleaned by the cleaner 117 as the moving blade shaft 113 rotates.

[0074] As Figure 7 and 8 shown, the screening device 11 includes a fixed ring 108, a drum sieve 110, a screening power device 115, and a feed hopper 111.

[0075] The fixed ring 108 is fixedly installed on the frame. It is provided with a feed inlet 127 at its bottom, a discharge outlet 129 at its top, and an annular baffle on its inner side. The drum sieve 110 is coaxially sleeved on the outer periphery of the fixed ring 108. It is provided with a baffle on its outer side and a plurality of material deflecting plates 128 on its inner circular surface, forming a material ring cavity therebetween. The screening power device 115 is fixedly installed and drives the drum sieve 110 to rotate. The screening power device 115 is a motor. One side of the top of the feed hopper 111 extends below the discharge outlet, and its bottom is located above the feed side of the coarse crushing device 10.

[0076] After the material is coarsely crushed, it falls into the feed inlet 127 through the lower crushing discharge hopper 116. Under the screening of the drum sieve 110, smaller particles directly pass through the drum sieve and fall outside, while larger particles roll upward under the drive of the material deflecting plates 128, then fall at the top and fall into the feed hopper 111 from the discharge outlet 129, and return to the coarse crushing device 10 again to achieve continuous cyclic crushing until the screening requirements are met. According to actual needs, the aperture of the drum sieve 110 can be selected between 4 - 18 mm. The rotation speed of the drum sieve 110 can be selected between 6 and 60 revolutions per minute, aiming to quickly stack the material at the feeding port and increase the crushing efficiency.

[0077] It should be noted that in order to better discharge the material, a splash-proof funnel 122 can also be provided below the drum sieve 110, so as to reduce particle splash when entering the next link.

[0078] As Figure 6 shown, the fine material processing device 2 is installed on the frame 3, and it includes a material magnetic separation device 20 for magnetic separation of the fine material obtained through continuous screening, a fine material crushing device 21 for secondary crushing of the non-magnetic material obtained through magnetic separation, and an aggregate device 22 for collecting the material obtained through secondary crushing.

[0079] The material magnetic separation device 20 includes a conveyor belt 230 and a magnetic attraction device 207.

[0080] The conveyor belt 230 has a low-level horizontal part, an inclined part, and a high-level horizontal part arranged along the conveying direction. The low-level horizontal part is located below the discharge side of the screening device 11. The magnetic attraction device 207 is fixedly installed inside the high-level horizontal part. The low-level horizontal part receives the smaller granular materials screened by the drum sieve 110, and then reaches the high-level horizontal part through the inclined part. Since the magnetic attraction device 207 is arranged inside the high-level horizontal part, the magnetic particles in the granular materials will be magnetically adsorbed, and then continue to bypass the front end and fall into the iron filings collection box 221 below away from the magnetic attraction device 207. The non-magnetic particles will fall off the surface of the conveyor belt at the moment of bypassing the end. The belt of the conveyor belt 230 is provided with a material conveying plate for carrying the materials to move upward.

[0081] The fine material crushing device 21 includes a fine crushing funnel 206, a fine crushing chamber 205, and a fine crushing motor 203.

[0082] The fine crushing funnel 206 is fixedly installed below the discharge side of the material magnetic separation device 20. The fine crushing chamber 205 is fixedly installed below the fine crushing funnel 206, and a crushing knife is arranged inside it. A screen is arranged at the bottom of the fine crushing chamber 205 with different aperture sizes required for different destruction requirements. The fine crushing motor 203 is fixedly installed on the fine crushing chamber 205 and drives the crushing knife to rotate. The non-magnetic particles will fall into the fine crushing funnel 206 and then enter the fine crushing chamber 205, and are further crushed under the action of the crushing knife. The crushing ability of the crushing knife is stronger than that of the moving knife 102, so finer particles are obtained. At the same time, since this part of the materials does not contain hard particles such as iron filings, the crushing knife can work at a higher rotational speed, and the service life of the crushing knife is also extended.

[0083] The aggregate device 22 is preferably a bagged vacuum cleaner with a super filter screen. When a certain quantity is reached and / or a material full alarm occurs, the power supply is turned off, the cabinet door and the vacuum cleaner are opened, and a new bag is replaced and then it runs again.

[0084] The coarse material processing device 1 further includes an intermediate aggregate device 12, and the intermediate aggregate device 12 includes a transition funnel 124, a funnel gate 126, and an aggregate box 120.

[0085] The transition funnel 124 is arranged between the low-level horizontal part of the conveyor belt 230 and the discharge side of the screening device 11. The funnel gate 126 is movably installed at the bottom of the transition funnel 124. The aggregate box 120 is fixedly installed below the low-level horizontal part of the conveyor belt 230, that is, below the transition funnel 124. When the feeding is closed, that is, the funnel gate 126 is closed, the material can be temporarily retained in the transition funnel 124. At this time, the conveyor belt 230 can be removed and the coarse material processing device can be used independently. After the conveyor belt 230 is placed back in its original position, the funnel gate 126 is opened again and normal magnetic separation can be carried out; if fine crushing is not required, the material directly goes into the lower aggregate box 120.

[0086] As Figure 9 shown, a casing 4 is also installed outside the frame 3. A feeding port 5 with a baffle is installed on the casing 4, control buttons 6 for controlling the coarse material processing device 1 and the fine material processing device 2, and a display screen 7 for displaying the operation data of the coarse material processing device 1 and the fine material processing device 2.

[0087] As a preferred solution, the frame 3 is divided into a first frame 31 and a second frame 32 that can be assembled and connected. The casing 4 is divided into a first casing 41 and a second casing 42. The control buttons 6 are divided into a first button 61 and a second button 62. The display screen 7 is divided into a first display screen 71 and a second display screen 72.

[0088] The feeding port 5, the first button 61 and the first display screen 71 are all installed on the first casing 41. The first casing 41 and the coarse material processing device 1 are both installed on the first frame 31. The second button 62 and the second display screen 72 are both installed on the second casing 42. The second casing 42 and the fine material processing device 2 are both installed on the second frame 32. Assembly methods such as magnetic attraction or snap connection can be used to make the coarse material processing part and the fine material processing part of this device be used separately, with better flexibility.

[0089] It can be known that there are electrical devices in the present invention, so there must also be a first controller and a second controller. The first controller is used to control the operation of the coarse material processing device 1. The first button 61 and the first display screen 71 are both electrically connected to the first controller. Similarly, the second controller is used to control the fine material processing device 2. The second button 62 and the second display screen 72 are both electrically connected to the second controller.

[0090] The controller can control the feeding speed, prevent the doors, covers, etc. from being opened during normal operation; once the doors or covers are opened, the crushing immediately stops; it can detect the working state and control the operation of the feeding mechanism, and relevant information can be displayed.

[0091] Before transportation and relocation, the power supply can be turned on. The operation unlocks the first frame 31 and the second frame 32, separates them, then turns off the power supply and separates them for relocation. After arriving at the destination, align them, then turn on the power supply and lock and fasten them after the operation.

[0092] In the case where the two need to work independently and separately, turn on the power supply to unlock, then disassemble the first frame 31 and the second frame 32, transport them to the destination separately, and then turn on the power supply and operate according to the operation prompts. After completion, align them again, turn on the power supply and lock and fasten them after the operation.

[0093] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, as well as a specific orientation structure and operation. Therefore, it should not be construed as a limitation to the present invention.

[0094] In addition, "first" and "second" are only for descriptive purposes, and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features.

[0095] Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0096] In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0097] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements.

[0098] For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0099] The above is only the preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art in the technical field, without departing from the technical principle of the present invention, several improvements and deformations can still be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. A small storage medium destruction machine, comprising a frame (3), characterized in that; Further comprising: A coarse material processing device (1), the coarse material processing device (1) is installed on the frame (3), and it includes: A coarse crushing device (10) for primary crushing of the storage medium, the coarse crushing device (10) includes: A crusher housing (103), the crusher housing (103) is fixedly installed; A moving knife shaft (113), two moving knife shafts (113) are rotatably installed in parallel inside the crusher housing (103); Crushing power devices, two crushing power devices are installed outside the crusher housing (103) and are respectively connected to the corresponding moving knife shafts (113); Moving knives (102), the moving knives (102) are installed on the corresponding moving knife shafts (113) and are staggered to form partial overlap; Adjusting gate mechanisms, two adjusting gate mechanisms are installed on the crusher housing (103), and each has two comb-shaped gates (112) that can swing around an axis. The comb-shaped gates (112) are provided with grooves that cooperate with the moving knives (102); A crushing discharge hopper (116), the crushing discharge hopper (116) is fixedly installed, the top opening thereof is located below the overlapping part of the moving knives (102), and the bottom opening extends to the upper side of the feeding side of the screening device (11); A screening device (11) for continuously screening the material obtained after primary crushing; A fine material processing device (2), the fine material processing device (2) is installed on the frame (3), and it includes: A material magnetic separation device (20) for magnetic separation of the fine material obtained after continuous screening, A fine material crushing device (21) for secondary crushing of the non-magnetic material obtained after magnetic separation, An aggregate device (22) for collecting the material obtained after secondary crushing.

2. The small storage medium destruction machine according to claim 1, wherein, An odd number of moving knives (102) are installed on one of the moving knife shafts (113), and an even number of moving knives (102) are installed on the other moving knife shaft (113); One of the comb-shaped gates (112) is provided with odd-numbered grooves that cooperate with the odd-numbered moving knives (102), and the other comb-shaped gate (112) is provided with even-numbered grooves that cooperate with the even-numbered moving knives (102).

3. The small storage medium destruction machine according to claim 2, characterized in that, The adjusting gate mechanism includes: Gate shafts (118), two gate shafts (118) are rotatably installed on the crusher housing (103) and are respectively installed corresponding to the comb-shaped gates (112); A lever (119), at least one lever (119) is installed on the gate shaft (118); Tension members (114), at least two tension members (114) are provided, one end of which is connected to the crusher housing (103), and the other end is connected to the end of the corresponding lever (119).

4. The small storage medium destroyer according to claim 3, characterized in that, The tension member (114) is a spring or an electric push rod, etc.

5. A small storage medium destruction machine according to claim 1, characterized in that, The screening device (11) includes: A fixed ring (108), the fixed ring (108) is fixedly installed, the bottom thereof is provided with a feed port (127), the top thereof is provided with a discharge port (129), and the inner side thereof is provided with an annular baffle; Rotary screen (110), the rotary screen (110) is coaxially sleeved on the outer periphery of the fixed ring (108), a baffle is arranged on its outer side, and a plurality of material deflecting plates (128) are arranged on its inner circular surface, and a material ring cavity is formed between the two; Screening power device (115), the screening power device (115) is fixedly installed and drives the rotary screen (110) to rotate; Feeding hopper (111), one side of the top of the feeding hopper (111) extends below the discharge port (129), and its bottom is located above the feeding side of the coarse crushing device (10).

6. The small storage medium destroyer according to claim 1, characterized in that, The material magnetic separation device (20) includes: Conveyor belt (230), the conveyor belt (230) has a low-level horizontal part, an inclined part and a high-level horizontal part arranged along the conveying direction, and the low-level horizontal part is located below the discharge side of the screening device (11); Magnetic attraction device (207), the magnetic attraction device (207) is fixedly installed inside the high-level horizontal part.

7. A small storage medium destruction machine according to claim 6, characterized in that, The coarse material processing device (1) further includes: an intermediate aggregate device (12), and the intermediate aggregate device (12) includes: Transition funnel (124), the transition funnel (124) is arranged between the low-level horizontal part of the conveyor belt (230) and the discharge side of the screening device (11); Funnel gate (126), the funnel gate (126) is movably installed at the bottom of the transition funnel (124); Aggregate box (120), the aggregate box (120) is fixedly installed below the low-level horizontal part of the conveyor belt (230).

8. A small storage medium destruction machine according to claim 1, characterized in that, The fine material crushing device (21) includes: Fine crushing funnel (206), the fine crushing funnel (206) is fixedly installed below the discharge side of the material magnetic separation device (20); Fine crushing chamber (205), the fine crushing chamber (205) is fixedly installed below the fine crushing funnel (206), and a crushing knife is arranged inside it; Fine crushing motor (203), the fine crushing motor (203) is fixedly installed on the fine crushing chamber (205) and drives the crushing knife to rotate.

9. A small storage medium destruction machine according to claim 1, characterized in that, An outer shell (4) is also installed outside the frame (3), and a feeding port (5) with a baffle is installed on the outer shell (4), control buttons (6) for controlling the coarse material processing device (1) and the fine material processing device (2), and a display screen (7) for displaying the operation data of the coarse material processing device (1) and the fine material processing device (2).

10. A small storage medium destruction machine according to claim 9, characterized in that, The frame (3) is divided into a first frame (31) and a second frame (32) that can be assembled, the outer shell (4) is divided into a first outer shell (41) and a second outer shell (42), the control buttons (6) are divided into a first button (61) and a second button (62), and the display screen (7) is divided into a first display screen (71) and a second display screen (72); The feeding port (5), the first button (61) and the first display screen (71) are all installed on the first outer shell (41), and the first outer shell (41) and the coarse material processing device (1) are both installed on the first frame (31); The second button (62) and the second display screen (72) are both mounted on the second housing (42), and the second housing (42) and the fine material processing device (2) are both mounted on the second frame (32).

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