Large-scale coal feeding and conveying coal mill

Abstract

A slag separating groove is formed between a coal mill shell and a grinding disc, the lower end of the slag separating groove is communicated with a plurality of slag outlets, the lower ends of the slag outlets are communicated with a crusher, a gate plate is arranged between the crusher and the slag outlets, the gate plate is connected with a gate plate hydraulic cylinder, the lower end of the crusher is communicated with a conveying belt, and the lower end of the conveying belt is connected with a motor. A plurality of grinding rollers above the grinding disc are obliquely arranged on a rolling frame, the rolling frame is in sliding connection with the top of the coal mill shell through a plurality of guide rods, a plurality of adjusting rods are further arranged outside the coal mill shell, one end of each adjusting rod is connected with the rolling frame, and the other end of each adjusting rod is connected with an adjusting hydraulic cylinder on the ground. By means of the mode that the crusher is matched with the conveying belt, automatic crushing and conveying of impurities are achieved, a large amount of dust generated in the manual conveying process of a traditional trolley is effectively avoided, the working environment is remarkably improved, and the health of operators is protected.

Description

Technical Field

[0001] The utility model relates to the field of coal mills, in particular to a coal mill for large-scale coal feeding and coal conveying. Background Art

[0002] The coal mill in the large-scale coal feeding and coal conveying system is one of the key equipment indispensable in industrial facilities such as thermal power plants. The main function of these coal mills is to grind raw coal into fine powder for subsequent combustion. However, there are some problems to be solved in the actual operation process.

[0003] Impurities that cannot be further pulverized (such as stones, metal fragments, etc.) generated during the coal grinding process are usually separated and collected in the slag separation tank. The current method is to use a trolley to collect these impurities and transport them out of the coal mill area manually. This process not only has low efficiency, but also generates a large amount of dust during the handling process, posing a threat to the health of operators.

[0004] The distance between the grinding roller and the grinding disc in the coal mill is crucial for the coal grinding effect. The current adjustment method is relatively complex and often requires manual adjustment after shutdown, which not only increases the maintenance cost and time consumption, but also may affect the coal grinding quality and equipment life due to improper adjustment. Content of the Utility Model

[0005] The main purpose of the utility model is to provide a coal mill for large-scale coal feeding and coal conveying, and solve the problems of using a trolley to collect these impurities and transport them out of the coal mill area manually and the adjustment of the distance between the grinding roller and the grinding disc.

[0006] To solve the above technical problems, the technical solution adopted by the utility model is: a coal mill for large-scale coal feeding and coal conveying, a slag separation tank is formed between the coal mill shell and the grinding disc, the lower end of the slag separation tank is communicated with a plurality of slag outlets, the lower end of the slag outlet is communicated with a crusher, a gate plate is arranged between the crusher and the slag outlet, the gate plate is connected with a gate plate hydraulic cylinder, the lower end of the crusher is communicated with a conveyor belt, a plurality of grinding rollers above the grinding disc are obliquely arranged on a rolling frame, the rolling frame is slidably connected with the top of the coal mill shell through a plurality of guide rods, and a plurality of adjusting rods are further arranged outside the coal mill shell, one end of the adjusting rod is connected with the rolling frame, and the other end is connected with an adjusting hydraulic cylinder on the ground.

[0007] In a preferred embodiment, the crusher is internally provided with at least two crushing shafts, the ends of the two crushing shafts are meshed through two gears, and the driving motor is connected with one of the crushing shafts.

[0008] In a preferred embodiment, a plurality of vertical plates are arranged on the conveyor belt body.

[0009] In a preferred embodiment, an outlet is formed by the external part of the top feed inlet of the coal mill shell and a conical shell. The conical shell is connected to a guide rod, and a rolling frame is slidably connected to the guide rod.

[0010] In a preferred embodiment, a plurality of guide sleeves are further provided outside the coal mill shell. The upper end of the adjusting rod passes through the guide sleeve and abuts against the lower end face of the rolling frame.

[0011] In a preferred embodiment, the telescopic end of the adjusting hydraulic cylinder is connected to the adjusting rod. A buffer tank is further provided on one side of the adjusting hydraulic cylinder, and the buffer tank is communicated with the hydraulic inlet of the adjusting hydraulic cylinder.

[0012] In a preferred embodiment, a support base embedded in the foundation is further provided, and the support base is hinged to the cylinder body of the adjusting hydraulic cylinder.

[0013] The utility model provides a coal mill for large-scale coal feeding and coal conveying. By setting the cooperation mode of a crusher and a conveyor belt, automatic crushing and transportation of impurities are realized, effectively avoiding a large amount of dust generated during the traditional manual transportation by trolley, significantly improving the working environment, and protecting the health of operators. At least two crushing shafts are provided inside the crusher, and synchronous rotation is achieved through gear meshing, improving the crushing efficiency and reliability. Through the cooperation of the adjusting hydraulic cylinder and the adjusting rod, automatic adjustment of the rolling distance between the grinding roller and the grinding disc is realized, simplifying the adjustment process and improving the working efficiency and safety. The introduction of an automatic slag discharge and crushing system and an automatic adjustment mechanism for the gap between the grinding roller and the grinding disc not only solves the slag discharge and adjustment problems in the prior art, but also improves the working efficiency and environmental protection performance of the overall equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The following further illustrates the utility model with reference to the drawings and embodiments:

[0015] Figure 1 is the overall external structure diagram of the utility model;

[0016] Figure 2 is the structure diagram of the installation position of the crusher of the utility model;

[0017] Figure 3 is the internal installation structure diagram of the crusher of the utility model;

[0018] Figure 4 is the structure diagram of the installation of the adjusting rod of the utility model.

[0019] In the figure: outlet 1; feed inlet 2; guide rod 3; rolling frame 4; grinding roller 5; grinding disc 6; transmission shaft 7; crushing motor 8; adjusting rod 9; gate hydraulic cylinder 10; gate 1001; conveyor belt 11; vertical plate 1101; adjusting hydraulic cylinder 12; buffer tank 1201; support base 1202; crusher 13; crushing shaft 1301; slag separation tank 14; guide sleeve 15. Detailed implementation mode

[0020] As Figures 1 to 4 shown, a coal mill for large-scale coal feeding and coal conveying, a slag separation tank 14 is formed between the coal mill shell and the grinding table 6. The lower end of the slag separation tank 14 is communicated with a plurality of slag outlets, the lower end of the slag outlet is communicated with a crusher 13, a gate 1001 is arranged between the crusher 13 and the slag outlet, the gate 1001 is connected with a gate hydraulic cylinder 10, the lower end of the crusher 13 is communicated with a conveyor belt 11. A plurality of grinding rollers 5 above the grinding table 6 are inclinedly arranged on a rolling frame 4. The rolling frame 4 is slidably connected with the top of the coal mill shell through a plurality of guide rods 3. A plurality of adjusting rods 9 are further arranged outside the coal mill shell. One end of the adjusting rod 9 is connected with the rolling frame 4, and the other end is connected with an adjusting hydraulic cylinder 12 on the ground.

[0021] A slag separation tank 14 is formed between the coal mill shell and the grinding table 6 for collecting impurities that cannot be ground during the coal grinding process. The lower end of the slag separation tank 14 is communicated with a plurality of slag outlets, and these slag outlets are connected with the crusher 13. A gate 1001 is arranged between the crusher 13 and the slag outlet, and the gate is controlled by a gate hydraulic cylinder 10 to realize the controllable discharge of impurities. The lower end of the crusher 13 is connected with the conveyor belt 11, and the crushed impurities are conveyed through the conveyor belt.

[0022] A plurality of grinding rollers 5 are inclinedly arranged on the rolling frame 4, and this design helps to improve the coal grinding efficiency. The rolling frame 4 is slidably connected with the top of the coal mill shell through a plurality of guide rods 3, ensuring the stability and accuracy of the rolling frame during the up and down movement. A plurality of adjusting rods 9 are arranged outside the coal mill shell. One end of these adjusting rods is connected with the rolling frame 4, and the other end is connected with an adjusting hydraulic cylinder 12 on the ground. The distance between the grinding roller and the grinding table is adjusted by pushing the adjusting rod through the adjusting hydraulic cylinder. At least two crushing shafts 1301 are arranged inside the crusher 13. The ends of the two crushing shafts are meshed through two gears, and the driving motor is connected with one of the crushing shafts to ensure the effectiveness and reliability of the crushing process.

[0023] A plurality of vertical plates are arranged on the belt body of the conveyor belt 11, which helps to prevent the scattered of the crushed impurities during the conveying process. The external of the feeding port 2 at the top of the coal mill shell and the shell of the conical structure form a discharge port 1. The shell of the conical structure is connected with the guide rod 3, and the rolling frame 4 is slidably connected with the guide rod 3, ensuring the smooth entry of materials and the effective separation of impurities. A plurality of guide sleeves 15 are further arranged outside the coal mill shell. The upper end of the adjusting rod 9 passes through the guide sleeve 15 and abuts against the lower end face of the rolling frame 4, ensuring the stability of the adjusting rod during the adjustment process. The telescopic end of the adjusting hydraulic cylinder 12 is connected with the adjusting rod 9. A buffer tank 1201 is further arranged on one side of the adjusting hydraulic cylinder 12, and the buffer tank 1201 is communicated with the hydraulic inlet of the adjusting hydraulic cylinder 12 to ensure the smoothness of the adjustment process.

[0024] In the preferred solution, the crusher 13 is internally provided with at least two crushing shafts 1301. The ends of the two crushing shafts 1301 are meshed through two gears, and the driving motor is connected to one of the crushing shafts 1301. The crusher is internally provided with at least two crushing shafts 1301, and the ends of these two crushing shafts are meshed with each other through two gears. The driving motor is connected to one of the crushing shafts 1301 for driving the two crushing shafts to rotate. The crusher can efficiently crush the large impurities discharged from the slag separation tank 14, enabling the subsequent conveyor belt 11 to smoothly convey the crushed impurities, thereby improving the operating efficiency of the entire system and the environmental protection level.

[0025] In the preferred solution, a plurality of vertical plates are provided on the belt body of the conveyor belt 11. The provision of a plurality of vertical plates on the belt body of the conveyor belt 11 helps to prevent the scattered of the crushed impurities during the conveying process.

[0026] In the preferred solution, the top feed port 2 of the coal mill housing is externally combined with a housing of a conical structure to form a discharge port 1. The housing of the conical structure is connected to the guide rod 3, and the rolling frame 4 is slidably connected to the guide rod 3. A plurality of guide sleeves 15 are further provided outside the coal mill housing. The upper end of the adjusting rod 9 passes through the guide sleeve 15 and abuts against the lower end surface of the rolling frame 4, ensuring the stability of the adjusting rod during the adjustment process.

[0027] In the preferred solution, a plurality of guide sleeves 15 are further provided outside the coal mill housing. The upper end of the adjusting rod 9 passes through the guide sleeve 15 and abuts against the lower end surface of the rolling frame 4. A plurality of guide sleeves 15 are provided outside the coal mill housing, and these guide sleeves are used to guide the up and down movement of the adjusting rod 9, ensuring the stability and straightness of the adjusting rod during the adjustment process. The upper end of the adjusting rod 9 passes through the guide sleeve 15 and is abutted and connected to the lower end surface of the rolling frame 4, rather than the traditional rigid fixed connection. Due to the adoption of the abutting connection instead of the rigid fixation, the vibration can be effectively reduced from being transmitted from the adjusting rod 9 to the rolling frame, thereby reducing the vibration of the entire coal mill and improving the operating stability of the equipment. Reducing the rigid connection can reduce the potential safety risks caused by the vibration of the equipment.

[0028] In the preferred solution, the telescopic end of the adjusting hydraulic cylinder 12 is connected to the adjusting rod 9, and a buffer tank 1201 is further provided on one side of the adjusting hydraulic cylinder 12. The buffer tank 1201 is communicated with the hydraulic inlet of the adjusting hydraulic cylinder 12. When the rolling frame 4 descends, the generated vibration force will be transmitted to the adjusting hydraulic cylinder 12. By transmitting the force squeezed inside the adjusting hydraulic cylinder to the inside of the buffer tank 1201, this part of the impact force can be effectively dispersed and absorbed, thereby reducing the pressure on the adjusting hydraulic cylinder and extending its service life. The presence of the buffer tank 1201 helps to maintain the stability of the hydraulic system, reduce the system fluctuations caused by the impact, and ensure the smoothness and accuracy of the adjustment process. By reducing the wear and faults of the adjusting hydraulic cylinder 12 caused by frequent impacts, the maintenance cost can be reduced and the overall operating efficiency of the equipment can be improved.

[0029] In a preferred embodiment, a support base 1202 embedded in the foundation is further provided, and the support base 1202 is hinged to the cylinder block of the adjusting hydraulic cylinder 12. The support base 1202 embedded in the foundation is used to provide a stable basic support to ensure the stability of the adjusting hydraulic cylinder 12 during operation.

[0030] The support base 1202 is connected to the cylinder block of the adjusting hydraulic cylinder 12 in a hinged manner. This connection method allows the adjusting hydraulic cylinder to swing freely within a certain range to adapt to the vibration and displacement generated during the operation of the coal mill. The support base 1202 embedded in the foundation provides a stable support foundation, which helps to ensure the stability of the adjusting hydraulic cylinder 12 during operation and reduces the unstable factors caused by uneven ground or vibration.

[0031] The above embodiments are only the preferred technical solutions of the present invention and should not be regarded as limitations on the present invention. The protection scope of the present invention should be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, the equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A large coal-feeding and coal-conveying coal mill, characterized by: A slag separation groove (14) is formed between the coal mill housing and the grinding disc (6). The lower end of the slag separation groove (14) is connected to a plurality of slag outlets. The lower end of the slag outlet is connected to a crusher (13). A gate plate (1001) is provided between the crusher (13) and the slag outlet. The gate plate (1001) is connected to a gate plate hydraulic cylinder (10). The lower end of the crusher (13) is connected to a conveyor belt (11). A plurality of grinding rollers (5) above the grinding disc (6) are tiltedly arranged on a rolling frame (4). The rolling frame (4) is slidably connected to the top of the coal mill housing through a plurality of guide rods (3). A plurality of adjustment rods (9) are also provided outside the coal mill housing. One end of the adjustment rod (9) is connected to the rolling frame (4), and the other end is connected to an adjustment hydraulic cylinder (12) on the ground.

2. A large-scale coal conveying and coal transportation pulverizer according to claim 1, characterized in that: The crusher (13) is provided with at least two crushing shafts (1301) inside, the ends of the two crushing shafts (1301) are meshed through two gears, and the driving motor is connected to one of the crushing shafts (1301).

3. A large-scale coal conveying and coal transportation pulverizer according to claim 1, characterized in that: A plurality of vertical plates are arranged on the belt body of the conveyor belt (11).

4. A large-scale coal conveying and coal transportation pulverizer according to claim 1, characterized in that: The outside of the feed port (2) at the top of the coal mill housing and the shell of the conical structure form a discharge port (1), the shell of the conical structure is connected to the guide rod (3), and the rolling frame (4) is slidably connected to the guide rod (3).

5. A large-scale coal conveying and coal transportation pulverizer according to claim 1, characterized in that: A plurality of guide sleeves (15) are also provided outside the coal mill housing, and the upper end of the adjusting rod (9) passes through the guide sleeve (15) and abuts against the lower end surface of the rolling frame (4).

6. A large-scale coal conveying and coal transportation pulverizer according to claim 5, characterized in that: The telescopic end of the regulating hydraulic cylinder (12) is connected to the regulating rod (9), and a buffer tank (1201) is also provided on one side of the regulating hydraulic cylinder (12), and the buffer tank (1201) is communicated with the hydraulic inlet of the regulating hydraulic cylinder (12).

7. A large-scale coal conveying and coal transportation pulverizer according to claim 5, characterized in that: A supporting base (1202) pre-buried in the foundation is also provided, and the supporting base (1202) is hingedly connected to the cylinder body of the regulating hydraulic cylinder (12).

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