Grinding device for solid waste recycling

By introducing a cooling medium delivery system into the grinding device, the problem of damage to the grinding components due to high temperature was solved, and effective cooling and stable operation of the device were achieved.

CN224672789UActive Publication Date: 2026-08-25HUNAN CHANGLUN RENEWABLE RESOURCES COMPREHENSIVE UTILIZATION CO LTD
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Patent Information

Application Number
CN202521962029.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-09-12
Publication Date
2026-08-25
Estimated Expiration
2035-09-12

AI Technical Summary

Technical Problem

Existing grinding and pulverizing components are damaged due to high temperatures generated by friction during long-term rotation and grinding, and lack an effective cooling mechanism.

Method used

A grinding device for solid waste recycling was designed, which adopts an internal grinding mechanism and a through-feed mechanism. It is connected to the condenser through a cooling medium conveying mechanism to realize the circulation input and discharge of the cooling medium and avoid high temperature damage.

Benefits of technology

It effectively reduces the temperature of the grinding components, avoids friction damage, and improves the service life and grinding efficiency of the device.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a kind of grinding devices for solid waste recovery, it is related to environmental protection brick production and processing equipment technical field, its technical key points include solid waste recovery tank body;Inner side grinding mechanism, the inner side grinding mechanism is fixed in the inner wall middle of solid waste recovery tank body;Rotary grinding mechanism, the rotary grinding mechanism is installed and is connected in the upper end inner side of solid waste recovery tank body, the lower end of the rotary grinding mechanism is located in the inner middle of inner side grinding mechanism;Through input mechanism, two the through input mechanism is symmetrically fixed on inner side grinding mechanism, technical effect is that inner side grinding mechanism can be input and discharge cooling medium by the through input mechanism of two ends, medium can be cooling gas or cooling liquid, through input mechanism can input or discharge medium by corresponding cooling medium conveying mechanism, cooling medium conveying mechanism is connected with condenser, so that cooling cooling can be carried out in circulation, avoid high temperature damage to appear grinding.
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Description

Technical Field

[0001] This utility model relates to the technical field of environmentally friendly brick production and processing equipment, specifically a grinding device for solid waste recycling. Background Technology

[0002] Coal gangue is a mineral solid waste generated during coal mining and washing. The rock types include shale, siltstone, mudstone, claystone, etc. The carbon it contains can provide heat when making sintered bricks, saving firing energy. It can also act as a foaming agent, forming more pores and giving the bricks better thermal insulation. When grinding and recycling solid waste, coal gangue requires grinding equipment for solid waste recycling.

[0003] The existing Chinese patent CN220514384U, disclosed on February 23, 2024, is an integrated waste crushing and recycling device, belonging to the field of construction waste treatment technology. It includes a support frame, a processing shell, and a feeding shell. The feeding shell houses a crushing and extrusion assembly, while the processing shell houses a grinding and pulverizing assembly for grinding and pulverizing the incoming construction waste. A grinding chamber is formed inside the processing shell, consisting of an upper and lower connected cavity. The lower cavity of the grinding chamber gradually expands outwards, and a gradually narrowing pulverizing passage is formed between the grinding and pulverizing assembly and the inner walls of the upper and lower cavities. The upper end of the pulverizing passage is connected to the feeding shell. Construction waste enters the pulverizing passage and is ground and pulverized from top to bottom within the gradually narrowing pulverizing passage. This effectively prevents solid particles from escaping. The waste is spirally propelled at the connection point between the two pulverizing stages, effectively reducing the chance of blockage and also having a dust reduction effect, thus improving the efficiency of construction waste crushing and recycling.

[0004] However, in actual use, the grinding and pulverizing components of the above-mentioned device generate high temperatures due to friction during long-term rotation and grinding. The grinding and pulverizing components cannot effectively cool down on their own, which can easily lead to high-temperature damage during long-term grinding.

[0005] Therefore, we propose a novel grinding device for solid waste recycling to solve the above-mentioned technical problems. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] To address the shortcomings of existing technologies, this utility model provides a grinding device for solid waste recycling, which solves the problem that in actual use of the above-mentioned devices, the grinding and crushing components generate high temperatures due to friction during long-term rotation and grinding, and the grinding and crushing components cannot effectively cool down on their own, thus easily leading to high-temperature damage during long-term grinding.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model provides the following technical solution: a grinding device for solid waste recycling, comprising:

[0010] Solid waste recycling tank;

[0011] An inner grinding mechanism is fixedly connected to the middle of the inner wall of the solid waste recycling tank.

[0012] A rotary grinding mechanism is installed and connected to the inner side of the upper end of the solid waste recycling tank, and the lower end of the rotary grinding mechanism is located in the middle of the inner grinding mechanism.

[0013] Two through-input mechanisms are symmetrically and through-fixed to the inner grinding mechanism;

[0014] A cooling medium conveying mechanism is installed on a through-input mechanism and connected to a condenser. There are two cooling medium conveying mechanisms: one is an inlet mechanism for inputting cooling medium, and the other is a drain mechanism for discharging cooling medium. The inlet mechanism and the drain mechanism are respectively connected and fixed to the two through-input mechanisms.

[0015] Preferably, the solid waste recycling tank includes a recycling tank shell, an electromagnetic valve is fixedly connected through the middle of the lower end of the recycling tank shell, a tank support column is fixedly connected to the outer side of the electromagnetic valve on the lower outer wall of the recycling tank shell, two electromagnetic vibrators are symmetrically fixedly connected to the lower outer wall of the recycling tank shell, a tank cover plate is installed on the inner side of the upper end of the recycling tank shell by screws, an environmental protection brick preparation solid waste feed pipe is fixedly connected through the inner side of the left end of the tank cover plate, and a rotating grinding mechanism is installed in the middle of the inner side of the tank cover plate.

[0016] Preferably, the rotary grinding mechanism includes a rotary motor, which is mounted on the tank cover plate by screws. A first coupling is fixedly connected to the output shaft end of the rotary motor. A rotating shaft is fixedly connected to the lower end of the first coupling. A connecting end block is fixedly connected to the lower end of the rotating shaft. A grinding roller is fixedly connected to the lower end of the connecting end block.

[0017] Preferably, the inner grinding mechanism includes a grinding shell, a grinding groove is formed in the middle of the grinding shell, a hollow fixed shell is fixedly connected to the outer wall of the grinding shell, a through groove is formed at the inner end of the hollow fixed shell, and through input cavities are symmetrically formed on the outer wall of the hollow fixed shell. A through input mechanism is fixedly installed on the hollow fixed shell through the input cavities, and the hollow fixed shell is fixedly connected to the outer shell of the recycling tank.

[0018] Preferably, the through-input mechanism includes a hollow cover, with a through-connecting cover fixedly connected to the inner end of the hollow cover. The through-connecting cover is fixedly connected to the hollow fixed shell. An outer input pipe is installed at the front end of the hollow cover by screws, and a cooling medium conveying mechanism is fixedly connected to the outer end of the outer input pipe.

[0019] Preferably, the cooling medium conveying mechanism includes a connecting horizontal pipe, one end of which is fixedly connected to the outer input pipe, a wrapping sleeve is sleeved around the periphery of the connecting horizontal pipe, a support rod is fixedly connected to the inner end of the wrapping sleeve, and a first valve is fixedly connected to the outer wall of the other end of the connecting horizontal pipe, and an outer connecting pipe is fixedly connected to the outer end of the first valve.

[0020] Preferably, the grinding roller body is sleeved in the grinding groove cavity of the grinding shell, and a grinding gap is provided between the grinding roller body and the grinding shell.

[0021] (III) Beneficial Effects

[0022] Compared with the prior art, the present invention provides a grinding device for solid waste recycling, which has the following beneficial effects:

[0023] 1. The inner grinding mechanism of this utility model can input and discharge cooling medium through the through-input mechanism at both ends. The medium can be cooling gas or cooling liquid. The through-input mechanism can input or discharge the medium through the corresponding cooling medium conveying mechanism. The cooling medium conveying mechanism is connected to the condenser, so that cooling can be circulated to avoid high temperature damage during grinding.

[0024] 2. This utility model features an internal grinding mechanism structure, which effectively contacts the cooling medium for cooling and temperature reduction. The grinding shell of the internal grinding mechanism has a grinding groove in the middle, which facilitates the falling of solid waste from environmentally friendly bricks for grinding. The grinding shell is cooled by the cooling medium inside the hollow fixed shell, thus preventing frictional high temperatures during grinding and avoiding frictional damage and deformation caused by high temperatures. The hollow fixed shell has a through groove that facilitates contact between the cooling medium and the grinding shell, enabling efficient heat exchange. The hollow fixed shell is fixedly installed with a through-feed mechanism through the input cavity, which facilitates installation and connection, and allows for the input and discharge of the cooling medium. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the grinding device for solid waste recycling according to this utility model;

[0026] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0027] Figure 3This is a schematic diagram of the combined structure of the cooling medium conveying mechanism and the through input mechanism of this utility model;

[0028] Figure 4 This is a schematic diagram of the rotating grinding mechanism, the solid waste recycling tank, and the inner grinding mechanism of this utility model.

[0029] Figure 5 This is a cross-sectional schematic diagram of the inner grinding mechanism of this utility model.

[0030] In the picture:

[0031] 1. Tank cover; 11. Solid waste feed pipe for environmentally friendly brick preparation; 2. Rotary motor; 21. First coupling; 22. Rotating shaft; 23. Grinding roller; 24. Connecting end block; 3. Connecting horizontal pipe; 31. Supporting end rod; 32. Wrapping sleeve; 4. Outer shell of recycling tank; 41. Electromagnetic vibrator; 42. Electromagnetic valve; 43. Tank support column foot; 5. Hollow cover; 51. Through-connecting cover; 52. Outer input pipe; 6. Outer connecting pipe; 61. First valve; 7. Hollow fixed shell; 71. Grinding shell; 72. Through groove; 73. Input sleeve cavity; 74. Grinding groove cavity. Detailed Implementation

[0032] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0033] Example 1

[0034] This embodiment provides a technical solution: a grinding device for solid waste recycling, such as... Figures 1-5 As shown, it includes a solid waste recycling tank, an inner grinding mechanism, a rotating grinding mechanism, a through-feed mechanism, and a cooling medium conveying mechanism.

[0035] The inner grinding mechanism is fixedly connected to the middle of the inner wall of the solid waste recycling tank. It can be stably placed in the middle of the inner wall of the tank and can receive and grind the solid waste from the preparation of environmentally friendly bricks. The rotating grinding mechanism is installed and connected to the inner upper part of the solid waste recycling tank. It can rotate within the inner upper part of the tank, with its lower end located in the middle of the inner grinding mechanism. During rotation, it can effectively grind the solid waste from the preparation of environmentally friendly bricks that falls between the two, thus grinding it into the corresponding particle size, facilitating subsequent processing and preparation of environmentally friendly bricks. Two through-feed input mechanisms are symmetrically connected to the inner grinding mechanism. The inner grinding mechanism can input and discharge cooling medium through the through-feed input mechanisms at both ends. The medium can be cooling gas or cooling liquid. A cooling medium conveying mechanism is installed on the through-feed input mechanism. It can input or discharge medium through the corresponding cooling medium conveying mechanism. The cooling medium conveying mechanism is connected to the condenser, allowing for cyclical cooling and preventing high-temperature damage during grinding.

[0036] like Figure 1 , Figure 2 and Figure 4 As shown, the solid waste recycling tank includes a tank shell 4. An electromagnetic valve 42 is fixedly connected to the lower middle of the tank shell 4. The ground materials used in the production of environmentally friendly bricks inside the tank shell 4 can be discharged and collected through the electromagnetic valve 42, facilitating subsequent processing and production of environmentally friendly bricks. Tank support columns 43 are fixedly connected to the outer side of the electromagnetic valve 42 on the lower outer wall of the tank shell 4. The symmetrical distribution of the four tank support columns 43 at the lower end of the tank shell 4 ensures stable support. Two electromagnetic vibrators 41 are symmetrically fixed to the lower outer wall of the tank shell 4. During material discharge, the two electromagnetic vibrators 41... The shaking can cause the outer shell 4 of the recycling tank to shake and discharge materials. The inner side of the upper end of the outer shell 4 of the recycling tank is equipped with a tank cover plate 1 by screws. The tank cover plate 1 can effectively seal the upper opening of the outer shell 4 of the recycling tank to prevent the entry of external materials and the flying out of the grinding material. The inner side of the left end of the tank cover plate 1 is connected to the feed pipe 11 for solid waste prepared by environmental protection bricks. The tank cover plate 1 can receive solid waste prepared by environmental protection bricks through the feed pipe 11 for addition. It can be effectively added to the upper part of the inner side of the outer shell 4 of the recycling tank. A rotating grinding mechanism is installed in the middle of the inner side of the tank cover plate 1. The rotating grinding mechanism can perform grinding rotation on the tank cover plate 1.

[0037] The electromagnetic vibrator 41 is model YZU-10-4, with a vibration frequency of 75Hz and an amplitude of 2mm. When the electromagnetic valve 42 opens to discharge material, the electromagnetic vibrator 41 is started synchronously and vibrates continuously for 5-10 seconds before being shut off to ensure that the material is completely discharged.

[0038] The rotary grinding mechanism includes a rotary motor 2, which is mounted on the tank cover plate 1 with screws for easy installation and removal. The output shaft of the rotary motor 2 can rotate through the tank cover plate 1. A first coupling 21 is fixedly connected to the end of the output shaft of the rotary motor 2. When the output shaft of the rotary motor 2 rotates, it can drive the first coupling 21 to rotate. A rotating shaft 22 is fixedly connected to the lower end of the first coupling 21. When the first coupling 21 rotates, it can drive the rotating shaft 22 to rotate. The rotating shaft 22 is set along the central axis of the tank cover plate 1 to ensure the stability of rotation later. A connecting end block 24 is fixedly connected to the lower end of the rotating shaft 22. The rotating shaft 22 can drive the connecting end block 24 to rotate. A grinding roller 23 is fixedly connected to the lower end of the connecting end block 24. The connecting end block 24 can drive the grinding roller 23 to rotate, thus enabling rotational grinding. An inner grinding mechanism is fixedly connected to the periphery of the grinding roller 23 on the inner wall of the outer shell 4 of the recycling tank. The grinding roller 23 can rotate and grind inside the inner grinding mechanism.

[0039] During use, the inner grinding mechanism can be stably placed in the middle of the inner wall of the solid waste recycling tank. It can receive and grind the solid waste from the preparation of environmentally friendly bricks. The rotating grinding mechanism can rotate inside the upper part of the solid waste recycling tank, and the lower part of the rotating grinding mechanism can rotate inside the middle of the inner grinding mechanism. During rotation, it can effectively grind the solid waste from the preparation of environmentally friendly bricks that falls between the two, thereby grinding it into the corresponding particle size, which is convenient for the subsequent processing and preparation of environmentally friendly bricks. The inner grinding mechanism can input and discharge cooling medium through the through-input mechanism at both ends. The medium can be cooling gas or cooling liquid. The through-input mechanism can input or discharge the medium through the corresponding cooling medium conveying mechanism. The cooling medium conveying mechanism is connected to the condenser, so that cooling can be circulated to avoid high temperature damage during grinding.

[0040] Example 2

[0041] This embodiment is a further optimization based on Embodiment 1. The parts that are the same as those described above will not be repeated here. Figure 1 , Figure 3 , Figure 4 and Figure 5As shown, to further better realize this utility model, the following configuration is specifically adopted: the inner grinding mechanism includes a grinding shell 71, which is made of wear-resistant metal, such as high manganese steel or wear-resistant cast iron. This effectively improves the overall service life and avoids friction damage during grinding. A grinding groove 74 is opened in the middle of the interior of the grinding shell 71 to facilitate the falling of solid waste from environmentally friendly bricks for grinding. The grinding groove 74 of the grinding shell 71 is concentric with the rotating shaft 22 to ensure the stability of the grinding rotation. A hollow fixed shell 7 is fixedly connected to the outer wall of the grinding shell 71. The grinding shell 71 can be cooled by the cooling medium inside the hollow fixed shell 7. Effective cooling is achieved to prevent the grinding shell 71 from experiencing high frictional temperatures during grinding, thus avoiding frictional damage and deformation caused by high temperatures. A through groove 72 is provided at the inner end of the hollow fixed shell 7. The through groove 72 facilitates contact between the cooling medium and the grinding shell 71, enabling efficient heat exchange. Symmetrical through-hole input cavities 73 are provided on the outer wall of the hollow fixed shell 7. The hollow fixed shell 7 can be connected and installed through the area of ​​the input cavity 73. A through-hole input mechanism is fixedly installed on the hollow fixed shell 7 through the input cavity 73, facilitating installation and connection. The hollow fixed shell 7 is fixedly attached to the outer shell 4 of the recovery tank, allowing for stable placement during grinding preparation.

[0042] The grinding roller 23 is fitted into the grinding groove 74 of the grinding housing 71 and can rotate within it. A grinding gap with a width of 5mm is provided between the grinding roller 23 and the grinding housing 71 to meet the grinding particle requirements of solid waste from environmentally friendly bricks, so that the solid waste material from environmentally friendly bricks can fall in for grinding.

[0043] The through-input mechanism includes a hollow cover 5, with a through-connecting cover 51 fixedly connected to the inner end of the hollow cover 5. The hollow cover 5 can transport the cooling medium into the through-connecting cover 51. The through-connecting cover 51 is fixedly connected to the hollow fixed shell 7. The through-connecting cover 51 can transport the cooling medium into the hollow fixed shell 7. An outer input pipe 52 is installed at the front end of the hollow cover 5 by screws. The hollow cover 5 can receive the cooling medium input by the outer input pipe 52. A cooling medium conveying mechanism is fixedly connected to the outer end of the outer input pipe 52. The outer input pipe 52 can receive the cooling medium conveyed by the cooling medium conveying mechanism.

[0044] There are two cooling medium conveying mechanisms: one is an inlet mechanism for inputting the cooling medium, and the other is a drain mechanism for discharging the cooling medium. The inlet mechanism and the drain mechanism are respectively connected and fixed to the two through-inlet mechanisms.

[0045] The cooling medium conveying mechanism includes a connecting horizontal pipe 3, which is hollow inside and can convey the cooling medium. One end of the connecting horizontal pipe 3 is fixedly connected to the outer input pipe 52, and the connecting horizontal pipe 3 can convey the cooling medium into the outer input pipe 52. A wrapping sleeve 32 is sleeved around the connecting horizontal pipe 3, and the connecting horizontal pipe 3 can be wrapped and positioned by the wrapping sleeve 32. A support rod 31 is fixedly connected to the inner end of the wrapping sleeve 32, and the wrapping sleeve 32 can be supported by the support rod 31. The support rod 31 is installed on the outer wall of the outer shell 4 of the recovery tank by screws, so that it can be stably placed and supported. A first valve 61 is fixedly connected to the outer wall of the other end of the connecting horizontal pipe 3, and the connecting horizontal pipe 3 can be easily opened by the first valve 61 to allow the internal cooling medium to flow. An outer connecting pipe 6 is fixedly connected to the outer end of the first valve 61, and the first valve 61 can facilitate the flow of the cooling medium through the outer connecting pipe 6.

[0046] After the cooling medium flows out of the condenser, it enters the hollow fixed shell 7 through the outer connecting pipe 6 of the liquid inlet mechanism, the first valve 61, the connecting horizontal pipe 3, the outer input pipe 52, and the through connecting cover 51. After exchanging heat with the grinding shell 71, it flows back to the condenser through the through connecting cover 51, the outer input pipe 52, the connecting horizontal pipe 3, the first valve 61, and the outer connecting pipe 6 on the other side, thus realizing circulating cooling.

[0047] The wiring diagrams of the electromagnetic vibrator 41 and electromagnetic valve 42 in this utility model are common knowledge in the field. Their working principle is a well-known technology. The appropriate model is selected according to the actual use. Therefore, the control method and wiring arrangement of the electromagnetic vibrator 41 and electromagnetic valve 42 will not be explained in detail.

[0048] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of this utility model.

Claims

1. A grinding device for recycling solid waste, characterized in that, include: Solid waste recycling tank; An inner grinding mechanism is welded and fixed to the middle of the inner wall of the solid waste recycling tank. A rotary grinding mechanism is installed and connected to the inner side of the upper end of the solid waste recycling tank, and the lower end of the rotary grinding mechanism is located in the middle of the inner grinding mechanism. Two through-input mechanisms are symmetrically and through-fixed to the inner grinding mechanism; A cooling medium conveying mechanism is installed on a through-input mechanism and connected to a condenser. There are two cooling medium conveying mechanisms: one is an inlet mechanism for inputting cooling medium, and the other is a drain mechanism for discharging cooling medium. The inlet mechanism and the drain mechanism are respectively connected and fixed to the two through-input mechanisms.

2. The grinding device for solid waste recycling according to claim 1, characterized in that: The solid waste recycling tank includes a recycling tank shell (4), an electromagnetic valve (42) is fixedly connected through the middle of the lower end of the recycling tank shell (4), a tank support column (43) is fixedly connected to the outer side of the electromagnetic valve (42) on the lower outer wall of the recycling tank shell (4), two electromagnetic vibrators (41) are symmetrically fixedly connected to the lower outer wall of the recycling tank shell (4), a tank cover plate (1) is installed on the inner side of the upper end of the recycling tank shell (4) by screws, and an environmental protection brick preparation solid waste feed pipe (11) is fixedly connected through the inner side of the left end of the tank cover plate (1).

3. The grinding device for solid waste recycling according to claim 1, characterized in that: The rotary grinding mechanism includes a rotary motor (2), which is mounted on the tank cover plate (1) by screws. The output shaft end of the rotary motor (2) is fixedly connected to a first coupling (21), the lower end of the first coupling (21) is fixedly connected to a rotating shaft (22), the lower end of the rotating shaft (22) is fixedly connected to a connecting end block (24), and the lower end of the connecting end block (24) is fixedly connected to a grinding roller body (23).

4. The grinding device for solid waste recycling according to claim 1, characterized in that: The inner grinding mechanism includes a grinding shell (71), a grinding groove (74) is provided in the middle of the interior of the grinding shell (71), a hollow fixed shell (7) is fixedly connected to the outer wall of the grinding shell (71) around the perimeter, a through groove (72) is provided at the inner end of the hollow fixed shell (7), and through input cavities (73) are symmetrically provided on the outer wall of the hollow fixed shell (7). A through input mechanism is fixedly installed on the hollow fixed shell (7) through the input cavity (73), and the hollow fixed shell (7) is fixedly connected to the outer shell (4) of the recycling tank.

5. A grinding device for solid waste recycling according to claim 1, characterized in that: The through-input mechanism includes a hollow cover (5), with a through-connecting cover (51) fixedly connected to the inner end of the hollow cover (5). The through-connecting cover (51) is fixedly connected to the hollow fixed shell (7). An outer input pipe (52) is installed at the front end of the hollow cover (5) by screws. A cooling medium conveying mechanism is fixedly connected to the outer end of the outer input pipe (52).

6. The grinding device for solid waste recycling according to claim 5, characterized in that: The cooling medium conveying mechanism includes a connecting horizontal pipe (3), one end of which is fixedly connected to the outer input pipe (52), a wrapping sleeve (32) is sleeved around the connecting horizontal pipe (3), a support end rod (31) is fixedly connected to the inner end of the wrapping sleeve (32), and a first valve (61) is fixedly connected to the outer wall of the other end of the connecting horizontal pipe (3), and an outer connecting pipe (6) is fixedly connected to the outer end of the first valve (61).

7. A grinding device for solid waste recycling according to claim 3, characterized in that: The grinding roller (23) is sleeved in the grinding groove (74) of the grinding housing (71), and a grinding gap is provided between the grinding roller (23) and the grinding housing (71).

Citation Information

Patent Citations

  • Integrated waste crushing and recycling device

    CN220514384U