CN211538125U - Grinding device of coal powder machine - Google Patents

Abstract

The utility model relates to a pulverized coal mill grinding device, belonging to the field of pulverized coal mills. A blower mechanism is provided, and one end of the side wall of the case away from the blower mechanism is fixedly connected with a discharge pipe that communicates with the case. The end of the box away from the crushing box is provided with a feeding port, a crushing blade fan is arranged in the crushing box, a first driving device for driving the crushing blade fan to rotate is arranged outside the crushing box, and a crushing roller shaft is arranged below the crushing blade fan. A second driving device for driving the rotation of the pulverizing roller shaft is arranged outside, and the utility model has the effect of improving the quality of pulverized coal.

Description

A pulverized coal grinding device

technical field

The utility model relates to the field of pulverized coal machines, in particular to a pulverized coal machine pulverizing device.

Background technique

The pulverized coal machine is a combined machine of hammer mill pulverization and centrifugal air supply. annealing) kiln, etc., the pulverized coal machine has the characteristics of completing the supply crushing, conveying and other technological processes at one time.

The existing Chinese patent with publication number CN2754722Y discloses a pulverized coal machine, which includes a frame and a casing, and a partition is arranged in the casing, and the partition divides the casing into a pulverizing chamber and a powder feeding chamber. There is a pulverized coal passage connecting the pulverizing chamber and the powder feeding chamber on the partition. There is a pulverized coal outlet on the side wall of the shell of the chamber, and the shaft of the pulverized coal machine is arranged at the axial position of the casing to drive the breaker and the pulverized coal blowing device to rotate. There is a drive unit.

The above-mentioned prior art solutions have the following defects: when the pulverized coal machine is in operation, only the breaker is used to pulverize the coal blocks, so that the quality of the pulverized coal is not fine enough and of high quality, and the effect of the pulverized coal combustion is reduced.

Utility model content

The purpose of the utility model is to provide a pulverized coal grinding device to achieve the effect of improving the quality of pulverized coal.

The above-mentioned utility model purpose of the present utility model is achieved through the following technical solutions:

A pulverized coal mill grinding device, comprising a chassis and a base for supporting the chassis, characterized in that: the top of the chassis is provided with a pulverizing box that communicates with the chassis, an end of the chassis close to the pulverizing box is provided with a blowing mechanism, and the side of the chassis is provided with a blowing mechanism. One end of the wall away from the blowing mechanism is fixedly connected with a discharge pipe that communicates with the chassis. The discharge pipe is close to the bottom end of the chassis. One side of the pulverizing box is provided with a feeding box that communicates with the pulverizing box. There is a feeding port, a crushing blade fan is arranged in the crushing box, a first driving device for driving the crushing blade fan to rotate is arranged outside the crushing box, a crushing roller shaft is arranged under the crushing blade fan, and a crushing roller is arranged outside the crushing box for driving the crushing blade A second drive for shaft rotation.

By adopting the above technical solution, when the coal enters the crushing box from the outlet through the feeding box, it is firstly crushed by the crushing blade fan running at high speed, and then falls onto the crushing roller shaft for crushing and grinding. Crushing the coal reduces the pressure of the crushing roller, making the crushing roller more stable during crushing. The double grinding structure makes the grinding quality more delicate and high-quality. The effect of pulverized coal combustion.

The utility model is further configured as follows: the feed port is provided with a cover plate hinged with the feed box, and the cover plate is used to close the feed port.

By adopting the above technical solution, when it rains or snows in bad weather, the cover plate closes the feeding port, so that rain and snow will not enter the crushing box from the feeding port, preventing rainwater from affecting the crushing blade fan and crushing roller. The erosion and damage of the shaft improves the service life of the crushing blade and crushing roller.

The utility model is further provided that: the pulverizing roller shaft is located at the communication place between the pulverizing box and the box, the axis of the pulverizing roller axis is located in the pulverizing box, and the bottom end of the pulverizing roller axis is located in the box.

By adopting the above technical solution, the position of the crushing roller shaft is located at the connection between the feeding box and the box body, and the bottom end of the crushing roller shaft is located in the box body. A part of the pulverizing roller realizes the cleaning of the pulverizing roller, so that the pulverizing process of the pulverizing roller remains efficient.

The utility model is further configured as follows: one end of the pulverizing roller shaft is fixedly connected with a rotating rod passing through the pulverizing box, each of the rotating rods is fixedly connected with rotating gears that mesh with each other, and one end of the rotating rod away from the pulverizing roller shaft is connected to the rotating rod. The second drive is connected.

By adopting the above technical solution, the driving device drives the rotating rod to rotate, and the rotating rod drives the rotating gears meshing with each other to rotate, so that the two crushing roller shafts rotate towards each other, which strengthens the crushing ability of the crushing roller shafts and improves the after crushing. quality of pulverized coal.

The utility model is further provided that: the blowing mechanism includes a fan and a fourth driving device for driving the fan to rotate.

By adopting the above technical solution, the driving device drives the fan to rotate, and the fan is located at one end of the box close to the pulverizing shaft.

The utility model is further provided that: the horizontal position of the top end of the fan is higher than the horizontal position of the bottom end of the crushing roller shaft.

By adopting the above technical solution, the part of the pulverizing roller located in the casing is subjected to the blowing force of the fan, which strengthens the cleaning of the pulverizing roller. The pulverizing effect of the pulverizing roller is improved.

The utility model is further configured as follows: a rotating wheel is arranged between the crushing blade fan and the crushing roller shaft, and a third driving device for driving the rotating wheel to rotate is arranged outside the crushing box.

By adopting the above technical solution, the coal crushed by the crushing blade fan falls onto the rotating wheel, the rotating wheel collects the coal, and the rotating wheel rotates, so that the coal on the rotating wheel falls on the crushing roller in an orderly manner, preventing the A large amount of coal falls on the pulverizing rollers at the same time, and at the same time, the pulverized coal after being pulverized by the pulverizing rollers will not accumulate in the chassis in large quantities. .

The utility model is further configured as follows: the discharge pipe is connected with the chassis through a flange.

By adopting the above technical solution, the discharge pipe connected by the flange is easier to disassemble. If coal powder accumulates in the discharge pipe, it is more convenient to clean up. At the same time, the sealing between the discharge pipe and the box is ensured, preventing The pulverized coal diffuses out of the outside from the junction of the discharge pipe and the box, causing waste.

The utility model is further configured as follows: an exhaust fan is arranged at the corner in the discharge pipe.

By adopting the above technical scheme, the setting of the exhaust fan enhances the ventilation efficiency of the discharge pipe, and at the same time prevents pulverized coal from accumulating at the corner of the discharge pipe, thereby effectively improving the discharge effect of the pulverized coal from the discharge pipe.

The utility model is further set as follows: the cross-section of the communication between the feeding box and the pulverizing box is circular, and the cross-sectional area of the feeding port is larger than the cross-sectional area of the communication between the feeding box and the pulverizing box.

By adopting the above technical scheme, the feeding box is a structure with a gradually reduced cross section from the feeding port to the place where the feeding box and the crushing box communicate, so that the coal plays a guiding role when sliding in the feeding box, and the coal is improved. the efficiency of concentrated crushing.

To sum up, the beneficial technical effects of the present utility model are:

1. The setting of the crushing blade fan and the crushing roller makes the grinding quality more delicate and high-quality, and the pulverized coal is more completely burned during combustion, which improves the combustion effect of the pulverized coal;

2. The setting of the rotating wheel prevents a large amount of coal from falling onto the pulverizing roller at the same time, and at the same time, the pulverized coal after being pulverized by the pulverizing roller will not accumulate in the box in large quantities, which ensures the high efficiency and stability of the grinding process;

3. The positional relationship between the pulverizing roller and the fan achieves the effect of cleaning the pulverizing roller. The pulverized coal blown by the fan from the pulverizing roller is located in the cabinet, which prevents the waste of pulverized coal and improves the pulverizing effect of the pulverizing roller. .

Description of drawings

Fig. 1 is the structural representation of a kind of pulverized coal mill grinding device of the present utility model;

Fig. 2 is the structural schematic diagram of the utility model when the cover plate is opened;

Fig. 3 is to show the structural representation of blower mechanism;

Fig. 4 is the structural representation in order to show the structure in the crushing box;

Fig. 5 is the structural representation in order to show the inner structure of the material pipe;

FIG. 6 is a schematic structural diagram for showing the rotational relationship of the pulverizing rollers.

In the figure, 1, chassis; 11, discharge pipe; 12, exhaust fan; 2, machine base; 3, crushing box; 31, crushing blade fan; 32, rotating wheel; 33, crushing roller; 34, rotating rod; 35, rotating gear; 36, first drive device; 37, second drive device; 38, third drive device; 4, feed box; 41, feed port; 42, cover plate; 5, blower mechanism; 51, A fan; 52. A fourth driving device.

Detailed ways

The present utility model will be described in further detail below in conjunction with the accompanying drawings.

Referring to FIG. 1 , a pulverized coal mill disclosed by the utility model includes a casing 1 and a base 2 for supporting the casing 1 .

As shown in Figures 1 and 2, the case 1 is an inner hollow structure, the side wall of the case 1 is provided with a discharge pipe 11, the discharge pipe 11 is close to the bottom end of the case 1, the discharge pipe 11 communicates with the case 1, and discharges The pipe 11 and the chassis 1 are connected by flanges, which makes the discharge pipe 11 easier to disassemble. If coal powder accumulates in the discharge pipe 11, it is more convenient to clean up. The discharge pipe 11 is provided with an exhaust fan 12 (refer to FIG. 5 ). ), the exhaust fan 12 is located at the corner of the discharge pipe 11, the top of the casing 1 is fixedly connected with a crushing box 3 that communicates with the casing 1, the crushing box 3 is vertically arranged, and the crushing box 3 is located on the casing 1 away from the discharging pipe At one end of 11, the side wall of the crushing box 3 away from the discharge pipe 11 is connected with the feeding box 4, the feeding box 4 is arranged obliquely, and the end of the feeding box 4 away from the crushing box 3 is provided with a feeding port 41. 4. The abutment with the crushing box 3 is circular, the feeding port 41 is rectangular, and the feeding port 41 is provided with a cover plate 42 hinged to the feeding box 4, and the cover plate 42 is used to close the feeding port 41, Effectively prevent foreign objects or rainwater from entering the chassis 1 .

As shown in FIG. 3 and FIG. 4 , a blower mechanism 5 is provided at one end of the box close to the crushing box 3 . The blower mechanism 5 includes a fan 51 and a fourth drive device 52 that drives the fan 51 to rotate. In this embodiment, the fourth drive device 52 It is a motor, the fan 51 is located inside the casing 1, the feed box 4 and the crushing roller shaft 33 are connected vertically with a crushing blade fan 31, and a first driving device 36 for driving the crushing blade fan to rotate is provided outside the crushing box 3, In this embodiment, the first driving device 36 is a motor, and two crushing roller shafts 33 are arranged horizontally at the communication between the crushing box 3 and the casing 1 . Located in the cabinet 1, a rotating wheel 32 is arranged between the crushing blade fan 31 and the crushing roller shaft 33, the rotating wheel 32 is located in the crushing box 3, and a third driving device 38 for driving the rotating wheel is arranged outside the crushing box 3. In the embodiment, the third driving device 38 is a motor, and both ends of the rotating wheel 32 in the length direction are in contact with the inner wall of the pulverizing box 3. The rotating wheel 32 prevents a large amount of coal from falling onto the pulverizing roller shaft 33 at the same time, and passing through the pulverizing roller shaft at the same time. 33 The pulverized pulverized coal will not accumulate in the chassis 1 in large quantities, which ensures the high efficiency and stability of the grinding process.

As shown in FIG. 6 , one end of the pulverizing roller shaft 33 is fixedly connected with a rotating rod 34 passing through the pulverizing box 3 . There are two rotating rods 34 , and one of the rotating rods 34 is connected with a second driving device 37 . The second driving device 37 is a motor, and the two rotating rods 34 are fixed with mutually meshing rotating gears 35. The second driving device 37 drives the rotating rod 34 to rotate, the rotating rod 34 drives the rotating gear 35 to rotate, and the rotating gear 35 drives the crushing The roller shaft 33 rotates, and the pulverizing roller shafts 33 rotate toward each other during rotation, which strengthens the pulverizing ability of the pulverizing roller shaft 33 and improves the quality of the pulverized coal.

The implementation principle of this embodiment is: before using the pulverized coal machine, start the first driving device 36, the second driving device 37, the third driving device 38 and the fourth driving device 52, so that the crushing blade fan 31, the rotating wheel 32, the crushing The roller shaft 33, the fan 51 and the exhaust fan 12 rotate, the cover plate 42 is turned up, and the coal enters from the feeding port 41, and the coal reaches the crushing blade fan 31 through the feeding box 4, and falls to the crushing blade fan 31 after being crushed. On the rotating wheel 32, the rotating wheel 32 rotates so that the crushed coal falls on the crushing roller shaft 33 in an orderly manner, and the crushing roller shaft 33 crushes the crushed coal into coal powder, and the coal powder falls into the cabinet 1 and is crushed. The fan 51 blows towards the discharge pipe 11, and the exhaust fan 12 in the discharge pipe 11 extracts the pulverized coal in the casing 1. In this embodiment, the structure in the crushing box 3 makes the grinding quality more delicate and high-quality, improving the The quality of the pulverized coal is improved, and the pulverized pulverized coal is more complete during combustion, which improves the combustion effect of the pulverized coal.

The examples of this specific embodiment are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore: all equivalent changes made according to the structure, shape and principle of the present invention are not It should be covered within the protection scope of the present invention.

Claims (10)

1. The utility model provides a coal pulverizer grinding device, includes quick-witted case (1) and frame (2) that are used for supporting quick-witted case (1), its characterized in that: the crushing device is characterized in that a crushing box (3) communicated with the machine box (1) is arranged at the top end of the machine box (1), an air blowing mechanism (5) is arranged at one end, close to the crushing box (3), of the machine box (1), a discharging pipe (11) communicated with the machine box (1) is fixedly connected to one end, far away from the air blowing mechanism (5), of the side wall of the machine box (1), the discharging pipe (11) is close to the bottom end of the machine box (1), a feeding box (4) communicated with the crushing box (3) is arranged on one side of the crushing box (3), a feeding hole (41) is formed in one end, far away from the crushing box (3), of the feeding box (4), a crushing knife fan (31) is arranged in the crushing box (3), a first driving device (36) used for driving the crushing knife fan (31) to rotate is arranged outside the crushing box (3), a crushing roller shaft (33) is arranged below the crushing knife fan (31.

2. The pulverizing device of coal pulverizer as claimed in claim 1, wherein: and a cover plate (42) hinged with the feeding box (4) is arranged on the feeding hole (41), and the cover plate (42) is used for sealing the feeding hole (41).

3. The pulverizing device of coal pulverizer as claimed in claim 1, wherein: the crushing roller shaft (33) is positioned at the communication position of the crushing box (3) and the case (1), the axis of the crushing roller shaft (33) is positioned in the crushing box (3), and the bottom end of the crushing roller shaft (33) is positioned in the case (1).

4. The pulverizing device of coal pulverizer as claimed in claim 3, wherein: the equal fixedly connected with in crushing roller (33) one end wears out dwang (34) of smashing case (3), and each fixedly connected with intermeshing's rotating gear (35) on dwang (34), the one end of keeping away from crushing roller (33) on one of them dwang (34) is connected with second drive arrangement (37).

5. The pulverizing device of coal pulverizer as claimed in claim 3, wherein: the air blowing mechanism (5) comprises a fan (51) and a fourth driving device (52) for driving the fan (51) to rotate.

6. The pulverizing device of coal pulverizer as claimed in claim 5, wherein: the horizontal position of the top end of the fan (51) is higher than the horizontal position of the bottom end of the crushing roller shaft (33).

7. The pulverizing device of coal pulverizer as claimed in claim 1, wherein: a rotating wheel (32) is arranged between the crushing blade fan (31) and the crushing roller shaft (33), and a third driving device (38) for driving the rotating wheel (32) to rotate is arranged outside the crushing box (3).

8. The pulverizing device of coal pulverizer as claimed in claim 1, wherein: the discharge pipe (11) is connected with the case (1) through a flange.

9. The pulverizing device of coal pulverizer as claimed in claim 7, wherein: an exhaust fan (12) is arranged at a corner in the discharge pipe (11).

10. The pulverizing device of coal pulverizer as claimed in claim 1, wherein: the cross section of the communicating part of the feeding box (4) and the crushing box (3) is circular, and the cross section area of the feeding port (41) is larger than that of the communicating part of the feeding box (4) and the crushing box (3).

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