Pulverized coal crushing and screening structure

Abstract

The utility model discloses a pulverized coal crushing and screening structure, and relates to the technical field of pulverized coal crushing. The pulverized coal crushing and screening structure comprises a crushing box, a feeding hopper is embedded in the surface of the top of the crushing box, a discharging opening is formed in the position, located at the bottom, of the surface of one side wall of the crushing box, a sealing door is arranged in an inner cavity of the discharging opening, the pulverized coal crushing and screening structure further comprises a crushing assembly, and the crushing assembly is arranged in the inner cavity of the crushing box and located under the feeding hopper; the crushing assembly is used for crushing pulverized coal; the guide hopper is arranged in the inner cavity of the crushing box and located under the crushing assembly, and the guide hopper is used for collecting pulverized coal crushed by the crushing assembly; the pulverized coal crushing and screening device not only can crush pulverized coal, but also can screen the crushed pulverized coal, and meanwhile can prevent the pulverized coal from being accumulated when the crushed pulverized coal is screened, so that the efficiency of crushing and screening the pulverized coal is improved, and the quality of the pulverized coal is improved to meet the requirement.

Description

Technical Field

[0001] The utility model relates to the technical field of coal powder crushing, in particular to a coal powder crushing and screening structure. Background Art

[0002] With the rapid development of industrialization, coal has become the main source of energy. However, there are some problems with the traditional direct use of lump coal, such as low combustion efficiency and difficult transportation. In order to overcome these problems, people began to try to process coal into fine particles of coal powder. In order to meet fuel needs, people found that grinding, screening and other processes to make coal powder can improve the utilization efficiency of coal and adapt to different application needs. At the same time, the fine particles of coal powder increase its surface area, making it easier for coal powder to contact with oxygen during combustion, thereby improving combustion efficiency. At the same time, the coal powder particles are evenly distributed, and the temperature and heat conduction during the combustion process are more uniform, which is conducive to fully releasing the energy in the coal.

[0003] However, the general coal powder crushing and screening structure directly screens the coal powder by dropping it on the filter net, which can easily cause the coal powder to clog the filter net, thereby causing coal powder to accumulate and fail to meet work requirements. Therefore, we propose a coal powder crushing and screening structure to solve the above problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a coal powder crushing and screening structure, which solves the problem that the general coal powder crushing and screening structure directly screens the coal powder by dropping it on the filter net, which easily causes the coal powder to clog the filter net, thereby causing coal powder to accumulate and thus failing to meet working requirements.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a coal powder crushing and screening structure, including a crushing box, a feed hopper is embedded on the top surface of the crushing box, a discharge port is opened on the surface of one side wall of the crushing box and located at the bottom, and a sealing door is provided in the inner cavity of the discharge port, and also includes:

[0006] A crushing assembly, the crushing assembly is arranged in the inner cavity of the crushing box and is located directly below the feed hopper, and the crushing assembly is used to crush the coal powder;

[0007] A guide hopper, which is arranged in the inner cavity of the crushing box and is located directly below the crushing assembly, and is used to collect the coal powder crushed by the crushing assembly;

[0008] A screening component, which is arranged in the inner cavity of the crushing box and is located directly below the guide hopper, and is used to screen the coal powder;

[0009] A storage assembly, which is disposed in the inner cavity of the crushing box and is located directly below the screening assembly, and is used to collect the screened coal powder; and

[0010] There are two pouring plates, which are respectively arranged on the two side walls of the inner cavity of the crushing box, and both of them are located directly above the crushing assembly. The pouring plates are used to prevent coal powder from falling to the two sides of the crushing box.

[0011] Preferably, the crushing assembly includes a protection box, which is arranged on the side wall of the inner cavity of the crushing box, and the protection box is located directly below the feed hopper;

[0012] The inner cavity of the protective box is provided with multiple motors, and the multiple motors are arranged in a linear array. The outer wall surface of the protective box is provided with multiple shaft rods, and one end of the multiple shaft rods passes through the side wall surface of the protective box and is respectively connected to the output ends of the multiple motors, and the multiple shaft rods are all sleeved with crushing rollers.

[0013] Preferably, the screening component comprises a hollow frame, the hollow frame is arranged in the inner cavity of the crushing box and is located directly below the guide hopper, a slot is provided in the middle of a side wall surface of the hollow frame, and a screening mesh plate is provided in the inner cavity of the slot;

[0014] The surfaces of both side walls of the hollow frame are provided with driving parts.

[0015] Preferably, a screw hole is opened on one side of the bottom surface of the hollow frame and in the middle, a limit screw is rotatably installed in the inner cavity of the screw hole, and one end of the limit screw is fitted with a position on one side of the bottom surface of the screening mesh plate.

[0016] Preferably, the driving part comprises a fixing frame, the fixing frame is arranged on a side wall of the inner cavity of the crushing box, and the fixing frame is located at a side position of the hollow frame;

[0017] An electric push rod is arranged in the inner cavity of the fixing frame, a connecting plate is arranged at the telescopic end of the electric push rod, and one end of the connecting plate is connected to a side wall of the hollow frame.

[0018] Preferably, the storage assembly comprises a storage box, the storage box is arranged in the inner cavity of the crushing box and is located directly below the hollow frame, and a support plate is arranged on the bottom surface of the crushing box;

[0019] Slide blocks are arranged at both sides of the bottom surface of the support plate, and slide rails are slidably installed at the bottom of the two slide blocks, and the bottom surfaces of the two slide rails are connected to the bottom surface of the inner cavity of the crushing box.

[0020] Preferably, magnets are embedded on the bottom surface of the storage box near the four corners, and the four magnets are magnetically connected to the top surface of the support plate.

[0021] Beneficial Effects

[0022] The utility model provides a coal powder crushing and screening structure. Compared with the prior art, it has the following beneficial effects:

[0023] When the staff needs to crush and screen the coal powder, the staff first turns on the crushing component and the screening component to operate them, and then pours the coal powder from the feed hopper into the crushing box, so that the coal powder falls onto the crushing component, and then the coal powder is crushed by the rotation of the crushing component, so that the larger lumps of coal powder can be decomposed into smaller particles, so as to achieve the effect of controlling the size of the coal powder to meet the needs of different processes, and then the crushed coal powder is collected through the guide hopper, so that the crushed coal powder can fall onto the screening component, and then the screening component is moved back and forth to screen the crushed coal powder on the screening component, so that the coal powder can be picked out, and the screening effect can be achieved;

[0024] The storage component can be used to store the coal powder that has fallen out of the screening component, thereby facilitating subsequent collection by the staff. When the staff needs to collect the screened coal powder, the staff opens the sealing door in the discharge port, thereby facilitating the staff to collect the screened coal powder, thereby improving the convenience of the staff in collecting coal powder. The two pouring plates in the crushing box can prevent the coal powder from falling onto the crushing component when pouring it. When the screening component stores a certain amount of retained large-particle coal powder, the staff can clean the screening component at this time, thereby ensuring the quality of subsequent screening of the screening component. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0026] Figure 2 This is a schematic diagram of the overall cross-sectional structure of the utility model;

[0027] Figure 3 This is a schematic diagram of the cross-sectional structure of the crushing component of the utility model;

[0028] Figure 4 This is a schematic diagram of the cross-sectional structure of the screening component of the utility model;

[0029] Figure 5 This is a schematic diagram of the structure of the drive unit of the utility model;

[0030] Figure 6 This is a schematic diagram of the cross-sectional structure of the practical storage component.

[0031] In the figure: 1. crushing box; 2. feed hopper; 3. discharge port; 4. sealing door; 5. pouring plate; 6. crushing assembly; 61. protection box; 62. motor; 63. shaft; 64. crushing roller; 7. guide hopper; 8. screening assembly; 81. hollow frame; 82. slot; 83. screening mesh plate; 84. screw hole; 85. limit screw; 86. driving part; 861. fixing frame; 862. electric push rod; 863. connecting plate; 9. storage assembly; 91. storage box; 92. support plate; 93. slider; 94. slide rail. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] See also Figure 1 , 2 The utility model provides a technical solution: a coal powder crushing and screening structure, including a crushing box 1, a feed hopper 2 is inlaid on the top surface of the crushing box 1, a discharge port 3 is opened on the surface of one side wall of the crushing box 1 and located at the bottom, and a sealing door 4 is provided in the inner cavity of the discharge port 3, and also includes: a crushing component 6, which is arranged in the inner cavity of the crushing box 1 and is located directly below the feed hopper 2, and the crushing component 6 is used to crush the coal powder; a guide hopper 7, which is arranged in the inner cavity of the crushing box 1 and is located directly below the crushing component 6, and the guide hopper 7 is used to collect the coal powder crushed by the crushing component 6 Coal powder; a screening component 8, which is arranged in the inner cavity of the pulverizing box 1 and is located directly below the guide hopper 7, and is used to screen the coal powder; a storage component 9, which is arranged in the inner cavity of the pulverizing box 1 and is located directly below the screening component 8, and is used to collect the screened coal powder; and a pouring plate 5, which is provided with two pouring plates 5, which are respectively arranged on the two side walls of the inner cavity of the pulverizing box 1, and the two pouring plates 5 are located directly above the crushing component 6, and the pouring plates 5 are used to prevent the coal powder from falling to the sides of the pulverizing box 1.

[0034] When the staff needs to crush and screen the coal powder, the staff first turns on the crushing component 6 and the screening component 8 to operate, and then pours the coal powder from the feed hopper 2 into the crushing box 1, so that the coal powder falls on the crushing component 6, and then the coal powder is crushed by the rotation of the crushing component 6, so that the larger lumps of coal powder can be decomposed into smaller particles, so as to achieve the effect of controlling the size of the coal powder to meet the needs of different processes, and then the crushed coal powder is collected through the guide hopper 7, so that the crushed coal powder can fall on the screening component 8, and then the screening component 8 is moved back and forth to screen the crushed coal powder on the screening component 8, so as to achieve The coal powder can be picked out to achieve the effect of screening. The coal powder that is screened out by the screening component 8 can be stored through the storage component 9, so as to facilitate the subsequent collection by the staff. When the staff needs to collect the screened coal powder, the staff opens the sealing door 4 in the discharge port 3, so as to facilitate the staff to collect the screened coal powder, so as to improve the convenience of the staff in collecting coal powder. The two pouring plates 5 in the crushing box 1 can prevent the coal powder from falling onto the crushing component 6 when pouring in. When the screening component 8 stores a certain amount of retained large-particle coal powder, the staff can clean the screening component 8 at this time, thereby ensuring the quality of subsequent screening of the screening component 8.

[0035] See also Figure 2 , Figure 3 The crushing assembly 6 includes a protective box 61, which is arranged on the side wall of the inner cavity of the crushing box 1, and the protective box 61 is located directly below the feed hopper 2; a plurality of motors 62 are arranged in a linear array in the inner cavity of the protective box 61, and a plurality of shaft rods 63 are arranged on the outer wall surface of the protective box 61, and one end of the plurality of shaft rods 63 passes through the side wall surface of the protective box 61 and is respectively connected to the output ends of the plurality of motors 62, and the plurality of shaft rods 63 are all sleeved with crushing rollers 64.

[0036] The protective box 61 in the crushing assembly 6 can be set on a side wall of the inner cavity of the crushing box 1, and can also provide an installation basis for multiple motors 62. When the staff needs to crush the coal powder, the staff first turns on the multiple motors 62 in the protective box 61. Since multiple shafts 63 are set on the outer wall surface of the protective box 61, and one end of the multiple shafts 63 passes through the side wall surface of the protective box 61 and is respectively connected to the output ends of the multiple motors 62, and the multiple shafts 63 are all sleeved with crushing rollers 64, so the motor 62 will drive the crushing rollers 64 to rotate through the shafts 63, so that the coal powder on the crushing rollers 64 can be crushed by the rotation of the multiple crushing rollers 64, thereby achieving the effect of crushing the coal powder.

[0037] See also Figure 1 , Figure 2 , Figure 4 , Figure 5 The screening component 8 includes a hollow frame 81, which is arranged in the inner cavity of the crushing box 1 and is located directly below the guide hopper 7. A slot 82 is provided in the middle position of the surface of one side wall of the hollow frame 81, and a screening mesh plate 83 is provided in the inner cavity of the slot 82; driving parts 86 are provided on the surface of both side walls of the hollow frame 81, a screw hole 84 is provided on one side of the bottom surface of the hollow frame 81 and is located in the middle position, and a limiting screw 85 is rotatably installed in the inner cavity of the screw hole 84, and one end of the limiting screw 85 is in contact with a position on one side of the bottom surface of the screening mesh plate 83, and the driving part 86 includes a fixing frame 861, which is arranged on one side wall of the inner cavity of the crushing box 1, and the fixing frame 861 is located on one side of the hollow frame 81; an electric push rod 862 is provided in the inner cavity of the fixing frame 861, and a connecting plate 863 is provided at the telescopic end of the electric push rod 862, and one end of the connecting plate 863 is connected to a side wall of the hollow frame 81.

[0038] The hollow frame 81 in the screening component 8 can be installed in the inner cavity of the crushing box 1 and provide a foundation for the slot 82. When the crushing roller 64 crushes the coal powder, the crushed coal powder will be collected by the guide hopper 7 and then fall onto the screening mesh plate 83 in the slot 82. Since the fixed frame 861 is located at one side of the hollow frame 81 and the inner cavity of the fixed frame 861 is provided with an electric push rod 862, and the telescopic end of the electric push rod 862 is provided with a connecting plate 863, and one end of the connecting plate 863 is connected to a side wall of the hollow frame 81, the electric push rod 862 in the fixed frame 861 moves forward and backward, so that the screening mesh plate 83 in the hollow frame 81 can be driven by the connecting plate 863. It moves back and forth to screen the crushed coal powder on the screening mesh plate 83, so as to prevent the coal powder from accumulating on the filter screen, thereby improving the efficiency of screening and crushing the coal powder. When the screening mesh plate 83 needs to be improved, the sealing door 4 is opened first, and then the limiting screw 85 in the screw hole 84 is rotated to release the limit on the screening mesh plate 83, so that the screening mesh plate 83 can be directly pulled out, which is convenient for the staff to replace the screening mesh plate 83. After the screening mesh plate 83 has been screened for a period of time, the staff opens the sealing door 4 to collect the unqualified coal powder screened out on the screening mesh plate 83, and then the unqualified coal powder can be crushed again to reduce the waste of coal powder.

[0039] See also Figure 1 , Figure 2 , Figure 6The storage component 9 includes a storage box 91, which is arranged in the inner cavity of the crushing box 1 and is located directly below the hollow frame 81. A support plate 92 is arranged on the bottom surface of the crushing box 1; sliders 93 are arranged on both sides of the bottom surface of the support plate 92, and slide rails 94 are slidably installed at the bottom of the two sliders 93, and the bottom surfaces of the two slide rails 94 are connected to the bottom surface of the inner cavity of the crushing box 1, and magnets are embedded on the bottom surface of the storage box 91 and near the four corners, and the four magnets are magnetically connected to the top surface of the support plate 92.

[0040] The storage box 91 in the storage assembly 9 can be installed in the inner cavity of the crushing box 1 and can also provide an installation foundation for the support plate 92. When the screening mesh plate 83 screens out qualified coal powder, the screened coal powder will fall into the storage box 91, thereby achieving the effect of collecting the qualified coal powder. When the qualified coal powder needs to be poured into the designated position, the sealing door 4 is opened first. Since the bottom surface of the crushing box 1 is provided with a support plate 92, and sliders 93 are provided on both sides of the bottom surface of the support plate 92, and slide rails 94 are slidably installed at the bottom of the slider 93, and the bottom surfaces of the two slide rails 94 are connected to the bottom surface of the inner cavity of the crushing box 1, pulling the storage box 91 will synchronously drive the two sliders 93 to slide on the two slide rails, so that the storage box 91 can be pulled out, and then the storage box 91 is lifted, so that the four magnets at the bottom of the storage box 91 release the magnetic attraction of the support plate, so that it is convenient for the staff to pour the qualified coal powder into the designated position, thereby improving the convenience of the staff.

[0041] During operation, when the staff needs to crush and screen the coal powder, the staff first starts the crushing component 6 and the screening component 8 to operate, and then pours the coal powder from the feed hopper 2 into the crushing box 1, so that the coal powder falls onto the crushing component 6, and then the coal powder is crushed by the rotation of the crushing component 6, so that the larger lumps of coal powder can be decomposed into smaller particles, so as to achieve the effect of controlling the size of the coal powder to meet the needs of different processes, and then the crushed coal powder is collected through the guide hopper 7, so that the crushed coal powder can fall onto the screening component 8, and then the screening component 8 is moved back and forth to screen the crushed coal powder on the screening component 8, so that it can be The coal powder can be picked out to achieve the effect of screening. The coal powder that is screened out by the screening component 8 can be stored through the storage component 9, so as to facilitate the subsequent collection by the staff. When the staff needs to collect the screened coal powder, the staff opens the sealing door 4 in the discharge port 3, so as to facilitate the staff to collect the screened coal powder, so as to improve the convenience of the staff in collecting coal powder. The two pouring plates 5 in the crushing box 1 can prevent the coal powder from falling onto the crushing component 6 when pouring in. When the screening component 8 stores a certain amount of retained large-particle coal powder, the staff can clean the screening component 8 at this time, thereby ensuring the quality of subsequent screening by the screening component 8.

[0042] The protective box 61 in the crushing assembly 6 can be set on a side wall of the inner cavity of the crushing box 1, and can also provide an installation basis for multiple motors 62. When the staff needs to crush the coal powder, the staff first turns on the multiple motors 62 in the protective box 61. Since multiple shafts 63 are set on the outer wall surface of the protective box 61, and one end of the multiple shafts 63 passes through the side wall surface of the protective box 61 and is respectively connected to the output ends of the multiple motors 62, and the multiple shafts 63 are all sleeved with crushing rollers 64, so the motor 62 will drive the crushing rollers 64 to rotate through the shafts 63, so that the coal powder on the crushing rollers 64 can be crushed by the rotation of the multiple crushing rollers 64, thereby achieving the effect of crushing the coal powder.

[0043] The hollow frame 81 in the screening component 8 can be installed in the inner cavity of the crushing box 1 and provide a foundation for the slot 82. When the crushing roller 64 crushes the coal powder, the crushed coal powder will be collected by the guide hopper 7 and then fall onto the screening mesh plate 83 in the slot 82. Since the fixed frame 861 is located at one side of the hollow frame 81 and the inner cavity of the fixed frame 861 is provided with an electric push rod 862, and the telescopic end of the electric push rod 862 is provided with a connecting plate 863, and one end of the connecting plate 863 is connected to a side wall of the hollow frame 81, the electric push rod 862 in the fixed frame 861 moves forward and backward, so that the screening mesh plate 83 in the hollow frame 81 can be driven by the connecting plate 863. It moves back and forth to screen the crushed coal powder on the screening mesh plate 83, so as to prevent the coal powder from accumulating on the filter screen, thereby improving the efficiency of screening and crushing the coal powder. When the screening mesh plate 83 needs to be improved, the sealing door 4 is opened first, and then the limiting screw 85 in the screw hole 84 is rotated to release the limit on the screening mesh plate 83, so that the screening mesh plate 83 can be directly pulled out, which is convenient for the staff to replace the screening mesh plate 83. After the screening mesh plate 83 has been screened for a period of time, the staff opens the sealing door 4 to collect the unqualified coal powder screened out on the screening mesh plate 83, and then the unqualified coal powder can be crushed again to reduce the waste of coal powder.

[0044] The storage box 91 in the storage assembly 9 can be installed in the inner cavity of the crushing box 1 and can also provide an installation foundation for the support plate 92. When the screening mesh plate 83 screens out qualified coal powder, the screened coal powder will fall into the storage box 91, thereby achieving the effect of collecting the qualified coal powder. When the qualified coal powder needs to be poured into the designated position, the sealing door 4 is opened first. Since the bottom surface of the crushing box 1 is provided with a support plate 92, and sliders 93 are provided on both sides of the bottom surface of the support plate 92, and slide rails 94 are slidably installed at the bottom of the slider 93, and the bottom surfaces of the two slide rails 94 are connected to the bottom surface of the inner cavity of the crushing box 1, pulling the storage box 91 will synchronously drive the two sliders 93 to slide on the two slide rails, so that the storage box 91 can be pulled out, and then the storage box 91 is lifted, so that the four magnets at the bottom of the storage box 91 release the magnetic attraction of the support plate, so that it is convenient for the staff to pour the qualified coal powder into the designated position, thereby improving the convenience of the staff.

[0045] In summary, the device can not only crush coal powder, but also screen the crushed coal powder, and can also prevent coal powder accumulation when screening the crushed coal powder, thereby improving the efficiency of crushing and screening the coal powder, and further improving the quality of the coal powder to meet the requirements.

[0046] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A coal powder crushing and screening structure, comprising a crushing box (1), wherein a feed hopper (2) is embedded on the top surface of the crushing box (1), a discharge port (3) is provided on a side wall surface of the crushing box (1) and at the bottom, and a sealing door (4) is provided in the inner cavity of the discharge port (3), characterized in that: Also includes: A crushing assembly (6), the crushing assembly (6) being arranged in the inner cavity of the crushing box (1) and located directly below the feed hopper (2), the crushing assembly (6) being used to crush the coal powder; A guide hopper (7), the guide hopper (7) being arranged in the inner cavity of the crushing box (1) and being located directly below the crushing assembly (6), the guide hopper (7) being used to collect the coal powder crushed by the crushing assembly (6); A screening component (8), the screening component (8) being arranged in the inner cavity of the crushing box (1) and being located directly below the guide hopper (7), the screening component (8) being used for screening coal powder; A storage component (9), the storage component (9) is arranged in the inner cavity of the crushing box (1), and the storage component (9) is located directly below the screening component (8), and the storage component (9) is used to collect the screened coal powder; as well as A dumping plate (5), wherein two dumping plates (5) are provided, and the two dumping plates (5) are respectively arranged on the two side walls of the inner cavity of the crushing box (1), and the two dumping plates (5) are both located directly above the crushing assembly (6), and the dumping plates (5) are used to prevent coal powder from falling to the two sides of the crushing box (1).

2. A coal powder crushing and screening structure according to claim 1, characterized in that: The crushing assembly (6) comprises a protection box (61), wherein the protection box (61) is arranged on the side wall of the inner cavity of the crushing box (1), and the protection box (61) is located directly below the feed hopper (2); The inner cavity of the protective box (61) is provided with a plurality of motors (62), and the plurality of motors (62) are arranged in a linear array. The outer wall surface of the protective box (61) is provided with a plurality of shafts (63), and one end of the plurality of shafts (63) passes through a side wall surface of the protective box (61) and is respectively connected to the output ends of the plurality of motors (62), and the plurality of shafts (63) are all sleeved with a crushing roller (64).

3. A coal powder crushing and screening structure according to claim 2, characterized in that: The screening component (8) comprises a hollow frame (81), the hollow frame (81) being arranged in the inner cavity of the crushing box (1) and being located directly below the guide hopper (7), a slot (82) being provided in the middle of a side wall surface of the hollow frame (81), and a screening mesh plate (83) being provided in the inner cavity of the slot (82); Driving parts (86) are provided on both side wall surfaces of the hollow frame (81).

4. A coal powder crushing and screening structure according to claim 3, characterized in that: A screw hole (84) is provided on one side of the bottom surface of the hollow frame (81) and in the middle thereof. A limit screw (85) is rotatably installed in the inner cavity of the screw hole (84), and one end of the limit screw (85) is in contact with a position on one side of the bottom surface of the screening mesh plate (83).

5. A coal powder crushing and screening structure according to claim 3, characterized in that: The driving part (86) comprises a fixing frame (861), the fixing frame (861) being arranged on a side wall of the inner cavity of the crushing box (1), and the fixing frame (861) being located on one side of the hollow frame (81); An electric push rod (862) is disposed in the inner cavity of the fixing frame (861), a connecting plate (863) is disposed at the telescopic end of the electric push rod (862), and one end of the connecting plate (863) is connected to a side wall of the hollow frame (81).

6. A coal powder crushing and screening structure according to claim 3, characterized in that: The storage assembly (9) comprises a storage box (91), the storage box (91) is arranged in the inner cavity of the crushing box (1) and is located directly below the hollow frame (81), and a support plate (92) is arranged on the bottom surface of the crushing box (1); Slide blocks (93) are provided at both sides of the bottom surface of the support plate (92), and slide rails (94) are slidably mounted at the bottom of the two slide blocks (93), and the bottom surfaces of the two slide rails (94) are connected to the bottom surface of the inner cavity of the crushing box (1).

7. A coal powder crushing and screening structure according to claim 6, characterized in that: Magnets are embedded on the bottom surface of the storage box (91) and near the four corners, and the four magnets are magnetically connected to the top surface of the support plate (92).

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