Pulverized coal sampling machine

Abstract

The utility model provides a pulverized coal sampling machine which comprises a coal pulverizing machine, a crushing box and a grinding chamber are sequentially arranged in the coal pulverizing machine, a feeding chute communicated with the coal pulverizing machine is arranged above the coal pulverizing machine, and a storage box communicated with the coal pulverizing machine is arranged below the coal pulverizing machine; two crushing rollers which rotate relatively are arranged in the crushing box, a rotating millstone is arranged in the grinding chamber, a pulverizing and discharging slide way is arranged below the millstone, a fixed cylinder is fixedly arranged on the pulverizing and discharging slide way, a motor is fixedly arranged at the bottom of the fixed cylinder, an output shaft of the motor is connected with the millstone through a main shaft for driving, and a spring is arranged between the fixed cylinder and the millstone; one end of the spring abuts against the fixing cylinder, the other end of the spring abuts against the millstone through the baffle ring and the bearing, and the main shaft is arranged in the fixing cylinder and the spring to rotate. The crushing rollers rotating relatively and the grinding disc rotating at a high speed in the grinding chamber are arranged, proper pressure is applied to the grinding disc in combination with the spring loading system, effective crushing and fine grinding of coal are ensured, and the powder making efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of pulverizers, in particular to a coal powder sample making machine. Background Art

[0002] In the field of coal industry and energy research, accurate analysis of coal samples is the basis for evaluating coal quality, guiding mining and utilization strategies, and optimizing the combustion process. Therefore, coal pulverization has become an indispensable pretreatment link, aiming to convert coal into uniform and fine powder for subsequent chemical composition analysis, calorific value testing, etc. However, the existing coal powder preparation process generally faces the problems of low pulverization efficiency and substandard pulverization quality, which poses a challenge to the accuracy of data and the repeatability of experiments.

[0003] Traditional coal powder making machines may have reduced grinding efficiency due to equipment aging, wear of key components or design defects, and may not be able to effectively crush and grind coal to the required fineness, affecting the quality of powder making. If the large amount of dust generated during the powder making process cannot be effectively collected and discharged, it will not only cause environmental pollution, but also cause insufficient negative pressure in the grinding chamber due to air leakage, affecting the efficiency and quality of powder making. Utility Model Content

[0004] The main purpose of the utility model is to provide a coal powder sample making machine to solve the problem that the grinding efficiency of the traditional coal powder sample making machine may be reduced due to equipment aging, wear of key components or design defects.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: comprising a powder making machine, wherein a crushing box and a grinding chamber are sequentially arranged in the powder making machine, a feeding chute connected to the powder making machine is arranged above the powder making machine, and a storage box connected to the powder making machine is arranged below the powder making machine;

[0006] Two relatively rotating crushing rollers are provided in the crushing box, a rotating grinding disc is provided in the grinding chamber, a powder-making discharge chute is provided under the grinding disc, a fixed cylinder is fixed on the powder-making discharge chute, a motor is fixed at the bottom of the fixed cylinder, the output shaft of the motor is connected and driven by the grinding disc through the main shaft, a spring is provided between the fixed cylinder and the grinding disc, one end of the spring rests on the fixed cylinder, and the other end rests on the grinding disc through a retaining ring and a bearing, and the main shaft rotates in the fixed cylinder and the spring.

[0007] Preferably, the top of one end of the feed chute is a feed port, and the bottom of the other end is a discharge port, and the discharge port is connected to the crushing box through a bag tube;

[0008] A negative pressure exhaust port is provided above the discharge port of the feed chute to prevent dust;

[0009] A vibrator is fixed under the feeding chute to speed up material feeding.

[0010] Preferably, a feed hopper is fixedly provided above the crushing box, and the top of the feed hopper is connected to the feed chute through a bag tube;

[0011] Two relatively rotating crushing rollers are arranged directly below the feed hopper, a crushing discharge chute is arranged below the crushing rollers, and a vibrator is fixedly arranged on the outer side of the crushing discharge chute.

[0012] Preferably, a spiral shaft is fixedly provided on the top of the grinding disc, and the spiral shaft is connected to the crushing box and the grinding chamber to speed up the grinding feed.

[0013] Preferably, a plurality of vibrators are fixedly provided on the outer side of the flour making discharge chute.

[0014] Preferably, a discharge port is provided at the bottom of the flour making machine, and the discharge port is connected to the storage box through a bag tube.

[0015] The utility model provides a coal powder sample making machine, which has the following beneficial effects:

[0016] 1. By setting the relatively rotating crushing roller and the high-speed rotating grinding disc in the grinding chamber, combined with the spring loading system to apply appropriate pressure to the grinding disc, the effective crushing and fine grinding of the coal material is ensured, and the powder making efficiency is improved. The introduction of the spiral shaft accelerates the feeding process of the grinding chamber, further improves the overall processing speed, and ensures the uniform distribution of materials, improving the powder making quality;

[0017] 2. The vibrators on the feed chute and crushing discharge chute effectively promote the flow of materials, reduce the risk of blockage, and ensure continuous and stable material transmission. The multi-point vibrator design further enhances this effect, ensuring the smooth progress of the entire process from feeding to milling and then to discharging;

[0018] 3. The setting of spring, retaining ring and bearing not only provides stable support for the grinding disc, but also protects the equipment from resonance damage by absorbing vibration and reducing impact, thus extending the service life of the equipment;

[0019] 4. The bag tube and negative pressure exhaust port design of the feeding chute discharge port effectively control dust, reduce environmental pollution, improve the working environment, protect the health of operators, and meet modern safety production standards;

[0020] 5. The direct connection between the feed hopper and the crushing box, the fast material transmission design of the spiral shaft, and the flexible connection between the discharge port and the storage box through the bag tube form a closed and efficient material handling process, reducing material loss and facilitating operation control and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0022] Figure 1 It is a front cross-sectional view of the overall structure of the utility model;

[0023] Figure 2 This utility model Figure 1 A partial enlarged view a in FIG.

[0024] In the figure: feed chute 1; negative pressure exhaust port 101; mill 2; feed hopper 3; crushing box 4; crushing roller 5; crushing discharge chute 6; screw shaft 7; grinding disc 8; milling discharge chute 9; fixed cylinder 901; discharge port 10; storage box 11; vibrator 12; main shaft 13; retaining ring 14; spring 15; bag tube 16; motor 17. DETAILED DESCRIPTION

[0025] like Figure 1~2 As shown, a coal powder making machine comprises a powder making machine 2, in which a crushing box 4 and a grinding chamber are arranged in sequence, a feeding chute 1 is arranged above the powder making machine 2 and connected thereto, and a storage box 11 is arranged below the powder making machine 2 and connected thereto;

[0026] Two relatively rotating crushing rollers 5 are arranged in the crushing box 4, a rotating grinding disc 8 is arranged in the grinding chamber, a powder-making material discharge chute 9 is arranged below the grinding disc 8, a fixed cylinder 901 is fixed on the powder-making material discharge chute 9, a motor 17 is fixed at the bottom of the fixed cylinder 901, the output shaft of the motor 17 is connected and driven with the grinding disc 8 through the main shaft 13, a spring 15 is arranged between the fixed cylinder 901 and the grinding disc 8, one end of the spring 15 abuts against the fixed cylinder 901, and the other end abuts against the grinding disc 8 through the retaining ring 14 and the bearing, and the main shaft 13 is arranged in the fixed cylinder 901 and the spring 15 and rotates. With this structure, the coal enters the crushing box 4 through the feed chute 1, is initially crushed by the two relatively rotating crushing rollers 5, and then enters the grinding chamber, and is further ground and powdered by the rotating grinding disc 8, and the grinding disc 8 can be pushed against the grinding chamber by the spring 15 to ensure the quality of grinding and powdering.

[0027] The equipment receives raw coal through the feed chute 1, which facilitates the continuous and uniform entry of materials into the system, reduces the need for manual operation and improves efficiency. The processed coal powder falls into the storage box 11 through the pulverizing chute 9, ready for subsequent processing or analysis.

[0028] The two relatively rotating crushing rollers 5 in the crushing box 4 are the key components of primary crushing. They crush the large coal pieces by shearing and squeezing, laying the foundation for the subsequent grinding process. This design can effectively reduce the size of coal while maintaining a high processing capacity.

[0029] The rotating grinding disc 8 in the grinding chamber is the core component, which drives the main shaft 13 to rotate through the motor 17, thereby grinding the crushed coal material at a deeper level.

[0030] The spring 15 not only ensures a constant contact pressure between the grinding disc 8 and the grinding chamber wall, but also allows the grinding disc to adapt to coal materials of different hardness and volume, automatically adjusting to maintain the best grinding effect. This dynamic adjustment mechanism is essential to maintain stable grinding performance and ensure the quality of coal powder.

[0031] The design of the fixing cylinder 901 provides a stable installation platform for the motor and the main shaft, while the combination of the spring 15, the retaining ring 14 and the bearing ensures the stability of power transmission and the durability of the system. Such a mechanical structure design helps to reduce wear and extend the service life of the equipment.

[0032] In summary, this coal powder sample preparation machine achieves high-efficiency and high-quality preparation of coal samples by integrating efficient crushing and grinding mechanisms, supplemented by an intelligent spring loading system, and is suitable for a variety of scenarios such as laboratory analysis and fuel preparation. Its design reflects the high attention paid to process optimization and equipment reliability.

[0033] Preferably, the top of one end of the feed chute 1 is a feed port, and the bottom of the other end is a discharge port, and the discharge port is connected to the crushing box 4 through the bag tube 16;

[0034] A negative pressure exhaust port 101 is provided above the discharge port of the feed chute 1 for dust prevention;

[0035] A vibrator 12 is fixedly provided below the feed chute 1 to speed up the feeding.

[0036] The bag tube 16 functions as a "flexible connection" and can provide a certain degree of freedom of movement between the feed chute 1 and the crushing box 4. This design can effectively absorb or reduce the vibration generated during the operation of the equipment, avoid or reduce the resonance phenomenon, and protect the equipment from structural fatigue or damage caused by long-term vibration. Especially in systems with high-speed rotating parts, reducing resonance is particularly important, which can improve the stability and life of the entire machine.

[0037] Negative pressure exhaust port 101 In the process of powder processing, dust prevention measures are essential to meet the standards of safe production and environmental protection. Negative pressure exhaust can not only effectively control the spread of dust and keep the working area clean, but also help improve the health and safety level of operators.

[0038] The vibrating kinetic energy generated by the vibrating device 12 can significantly improve the fluidity of the material in the feed chute 1, especially for coal materials that are prone to agglomeration or adhesion, and can effectively prevent blockage and ensure continuous and uniform feeding, which is crucial to maintaining the stable operation of the entire production line.

[0039] Preferably, a feed hopper 3 is fixedly provided above the crushing box 4, and the top of the feed hopper 3 is connected to the feed chute 1 through a bag tube 16;

[0040] Two relatively rotating crushing rollers 5 are arranged directly below the feed hopper 3 , a crushing discharge chute 6 is arranged below the crushing rollers 5 , and a vibrator 12 is fixedly arranged on the outer side of the crushing discharge chute 6 .

[0041] The feed hopper 3 added above the crushing box 4 not only provides temporary storage space, making the feeding process smoother, but also can realize flexible connection with the feed chute 1 through the bag tube 16 on the top. This design not only ensures the continuous supply of materials, but also reduces the vibration or impact that may be caused by direct hard connection through the buffering effect of the bag tube, thereby enhancing the stability of the system.

[0042] The two crushing rollers 5 are arranged directly below the feed hopper 3, and directly receive the coal material dropped from the feed hopper 3, ensuring that the material can enter the crushing process efficiently and continuously. The design of the two crushing rollers 5 rotating relative to each other increases the contact area and efficiency of crushing, and can effectively crush large pieces of coal material.

[0043] The crushed material moves down through the crushing material chute 6, and a vibrator 12 is fixed on the outside of the chute. The vibrator 12 can not only help the crushed coal material to pass through the chute quickly and smoothly, reducing the risk of blockage, but also can further loosen the material by vibration to a certain extent, making better preparations for the subsequent grinding process.

[0044] Preferably, a spiral shaft 7 is fixedly provided on the top of the grinding disc 8, and the spiral shaft 7 is connected to the crushing box 4 and the grinding chamber to speed up the grinding feed.

[0045] The spiral shaft 7 connects the crushing box 4 and the grinding chamber, and serves as an efficient material conveying channel. The coal material that has been initially crushed can be continuously and evenly conveyed to the top of the grinding disc through the spiral shaft. This design avoids the impact and accumulation that may be caused by direct falling, which is conducive to maintaining the continuity and stability of the grinding process.

[0046] The active material conveying method through the screw shaft 7 may reduce the risk of blockage inside the grinding chamber and reduce energy consumption compared to relying entirely on gravity or other passive methods. The efficient material conveying mechanism can shorten the residence time of the material in the grinding chamber and improve the processing capacity and energy utilization efficiency of the equipment as a whole.

[0047] Preferably, a plurality of vibrators 12 are fixedly provided on the outer side of the flour making discharge chute 9 .

[0048] During the transportation process, coal powder or other powdery materials are easily gathered or adhered to the slideway wall due to factors such as static electricity, humidity or friction between particles, resulting in blockage. The vibrator 12 can effectively loosen the materials and make them flow smoothly by generating periodic vibrations, thereby preventing accumulation and blockage.

[0049] Vibration can also help ensure that the powder material is more evenly distributed in the chute, avoiding large pieces or agglomerated materials affecting the continuity and uniformity of material discharge. This is crucial for subsequent processing because it directly affects the quality of the final product and production efficiency.

[0050] Preferably, a discharge port 10 is provided at the bottom of the flour making machine 2 , and the discharge port 10 is connected to the storage box 11 through a bag tube 16 .

[0051] The bag tube 16 is a transition part connecting the discharge port 10 and the storage box 11. One of its main functions is to further capture and filter the fine coal powder particles discharged from the pulverizer. This can reduce dust emissions and keep the working environment clean. At the same time, it also protects the quality of the coal powder in the storage box and avoids pollution or quality degradation caused by dust backflow.

[0052] As mentioned before, the use of the bag tube 16 also provides a flexible connection between devices, which can absorb and alleviate the vibration generated by the flour mill during operation, avoid resonance or structural damage that may be caused by direct rigid connection, and enhance the stability and durability of the system.

[0053] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A coal powder prototyping machine, characterized by: The invention comprises a powder making machine (2), wherein a crushing box (4) and a grinding chamber are sequentially arranged in the powder making machine (2), a feeding chute (1) connected thereto is arranged above the powder making machine (2), and a material storage box (11) connected thereto is arranged below the powder making machine (2); Two crushing rollers (5) are provided in the crushing box (4) and rotate relative to each other. A rotating grinding disc (8) is provided in the grinding chamber. A powder-making material discharge chute (9) is provided below the grinding disc (8). A fixed cylinder (901) is fixedly provided on the powder-making material discharge chute (9). A motor (17) is fixedly provided at the bottom of the fixed cylinder (901). The output shaft of the motor (17) is connected to the grinding disc (8) through a main shaft (13) for driving. A spring (15) is provided between the fixed cylinder (901) and the grinding disc (8). One end of the spring (15) abuts against the fixed cylinder (901), and the other end abuts against the grinding disc (8) through a retaining ring (14) and a bearing. The main shaft (13) is arranged in the fixed cylinder (901) and the spring (15) and rotates.

2. A coal powder sample making machine according to claim 1, characterized in that: The top of one end of the feed chute (1) is a feed opening, and the bottom of the other end is a discharge opening, and the discharge opening is connected to the crushing box (4) through a bag tube (16); A negative pressure exhaust port (101) is provided above the discharge port of the feed chute (1) for preventing dust; A vibrator (12) is fixedly provided below the feeding chute (1) to speed up feeding.

3. A coal powder sample making machine according to claim 1, characterized in that: A feed hopper (3) is fixedly provided above the crushing box (4), and the top of the feed hopper (3) is connected to the feed chute (1) through a bag tube (16); Two relatively rotating crushing rollers (5) are arranged directly below the feed hopper (3), a crushing discharge chute (6) is arranged below the crushing rollers (5), and a vibrator (12) is fixedly arranged on the outer side of the crushing discharge chute (6).

4. A coal powder sample making machine according to claim 1, characterized in that: A spiral shaft (7) is fixedly arranged on the top of the grinding disc (8), and the spiral shaft (7) is connected to the crushing box (4) and the grinding chamber to speed up the grinding feed.

5. A coal powder sample making machine according to claim 1, characterized in that: A plurality of vibrators (12) are fixedly arranged on the outer side of the flour-making discharge chute (9).

6. A coal powder sample making machine according to claim 1, characterized in that: A discharge port (10) is provided at the bottom of the flour making machine (2), and the discharge port (10) is connected to the material storage box (11) through a bag tube (16).

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