CN215353800U - Coal mill for thermal power plant - Google Patents

Abstract

The utility model discloses a coal mill for a thermal power plant, which comprises a body, a crushing cavity arranged in the body, a grinding cavity arranged at the bottom of the crushing cavity, a grinding part arranged in the grinding cavity, a crushing part arranged in the crushing cavity and a feed inlet arranged at the top of the body, wherein the crushing part comprises a rotating rod arranged in the crushing cavity, a plurality of groups of crushing cutters arranged on the rotating rod and a plurality of fly-away plates arranged at the bottom end of the rotating rod and matched with the bottom wall in the crushing cavity, the section of the bottom of the crushing cavity is triangular, and the fly-away plates are obliquely arranged on the rotating rod.

Description

Coal mill for thermal power plant

Technical Field

The utility model belongs to the technical field of coal mills, and particularly relates to a coal mill for a thermal power plant.

Background

The coal mill is a key device for crushing after the materials are crushed, and is also often used for preparing coal powder and producing powder with large coal gangue yield in special steel plants, thermal power plants and cement plants; the problems existing in the prior art are as follows: some coal mills can be crushed incompletely during the grinding process, so that incomplete combustion can be caused during final combustion, and waste is generated.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, the utility model provides the coal mill for the thermal power plant, which has the advantage of uniform grinding and solves the problems of incomplete combustion and waste caused by incomplete crushing in the prior art.

The coal mill for the thermal power plant comprises a body, a crushing cavity arranged in the body, a grinding cavity arranged at the bottom of the crushing cavity, a grinding part arranged in the grinding cavity, a crushing part arranged in the crushing cavity and a feed inlet arranged at the top of the body, wherein the crushing part comprises a rotating rod arranged in the crushing cavity, a plurality of groups of crushing cutters arranged on the rotating rod and a plurality of fly-away plates arranged at the bottom end of the rotating rod and matched with the bottom wall of the crushing cavity, the cross section of the bottom of the crushing cavity is triangular, and the fly-away plates are obliquely arranged on the rotating rod.

Preferably, the inner bottom wall of the crushing cavity is provided with a plurality of feeding holes for communicating with the grinding cavity.

Preferably, the polishing member includes a polishing block provided at a bottom portion of the rotating lever, a plurality of first polishing portions provided on a side wall of the polishing block, and a plurality of second polishing portions provided on an inner side wall of the polishing chamber and engaged with the first polishing portions, and the second polishing portions are not on the same plane as the first polishing portions.

Preferably, the bottom wall of the grinding cavity is provided with a discharge hole, the bottom of the discharge hole is provided with a discharge cylinder, and the bottom of the discharge cylinder is communicated with the bottom wall of the body.

Preferably, the outer bottom wall of the body is provided with an anti-overflow part matched with the discharging barrel.

Preferably, the bottom of the body is provided with a support ring for supporting the body, and the bottom of the support ring is provided with a plurality of support legs.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the utility model, the rotating rod, the crushing cutter and the flying plate are arranged, so that the material entering the crushing cavity can be crushed by the crushing cutter, and the effect of crushing the material is achieved.

2. According to the utility model, the feeding hole is arranged, so that completely crushed materials can enter the grinding cavity through the feeding hole, and a screening effect is achieved.

3. According to the utility model, by arranging the grinding block, the first grinding part and the second grinding part, when the grinding block rotates, materials enter the first grinding part and the second grinding part, the grinding effect is achieved, and the grinding performance is improved.

4. The discharging hole and the discharging barrel are arranged, so that ground materials can enter the discharging barrel from the discharging hole and then are discharged out of the body, and the discharging effect is achieved.

5. The overflow-preventing part is arranged, so that materials discharged from the discharging barrel cannot overflow, and a limiting effect is achieved.

6. According to the utility model, the support ring and the support legs are arranged, so that the body is fixed by the support ring and then supported by the support legs, and materials are taken from a space supported by the support legs.

Drawings

FIG. 1 is a schematic diagram of a structure provided by an embodiment of the present invention;

FIG. 2 is a left side view provided by an embodiment of the present invention;

fig. 3 is a cross-sectional view at a-a provided by an embodiment of the present invention.

In the figure: 1. a body; 11. a crushing chamber; 12. a grinding chamber; 13. a feed inlet; 14. rotating the rod; 15. a crushing knife; 16. a flying plate is struck; 21. a feed port; 31. grinding blocks; 32. a first polishing section; 33. a second polishing section; 41. a discharge hole; 42. a discharging barrel; 51. an anti-overflow part; 61. a support ring; 62. and (5) supporting legs.

Detailed Description

In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings.

The structure of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1 to 3, the coal mill for a thermal power plant according to an embodiment of the present invention includes a main body 1, a crushing chamber 11 disposed in the main body 1, a grinding chamber 12 disposed at the bottom of the crushing chamber 11, a grinding component disposed in the grinding chamber 12, a crushing component disposed in the crushing chamber 11, and a feed inlet 13 disposed at the top of the main body 1, where the crushing component includes a rotating rod 14 disposed in the crushing chamber 11, a plurality of sets of crushing cutters 15 disposed on the rotating rod 14, and a plurality of fly-plate impact plates 16 disposed at the bottom end of the rotating rod 14 and matched with the inner bottom wall of the crushing chamber 11, the bottom of the crushing chamber 11 has a triangular cross section, and the fly-plate impact plates 16 are obliquely disposed on the rotating rod 14.

Referring to fig. 3, a plurality of feeding holes 21 for communicating with the grinding chamber 12 are provided on the inner bottom wall of the crushing chamber 11.

Adopt above-mentioned scheme: through setting up feed opening 21, can make the complete material of being broken get into grinding chamber 12 through feed opening 21, played the effect of screening.

Referring to fig. 3, the grinding member includes a grinding block 31 disposed at the bottom of the rotating rod 14, a plurality of first grinding portions 32 disposed on the side walls of the grinding block 31, and a plurality of second grinding portions 33 disposed on the side walls of the grinding chamber 12 and engaged with the first grinding portions 32, wherein the second grinding portions 33 are not on the same plane as the first grinding portions 32.

Adopt above-mentioned scheme: through setting up grinding block 31, first grinding portion 32 and second grinding portion 33, when can making grinding block 31 rotate the material and get into first grinding portion 32 and second grinding portion 33 on, play the effect that rolls, improve crushing performance.

Referring to fig. 3, a discharge hole 41 is arranged on the bottom wall of the grinding chamber 12, a discharge barrel 42 is arranged at the bottom of the discharge hole 41, and the bottom of the discharge barrel 42 is communicated with the bottom wall of the body 1.

Adopt above-mentioned scheme: through setting up relief hole 41 and play feed cylinder 42, can make the material after being ground get into again and discharge to the body 1 outside in the feed cylinder 42 from relief hole 41, play the effect of the ejection of compact.

Referring to fig. 3, the outer bottom wall of the body 1 is provided with a spill prevention part 51 matched with the discharging cylinder 42.

Adopt above-mentioned scheme: through setting up anti-overflow portion 51, can make the material of following discharging barrel 42 internal discharge can not spill over, played the restriction effect.

Referring to fig. 3, the bottom of the body 1 is provided with a support ring 61 for supporting the body 1, and the bottom of the support ring 61 is provided with a plurality of support legs 62.

Adopt above-mentioned scheme: through setting up support ring 61 and supporting leg 62, can make body 1 fixed by support ring 61 and then by supporting leg 62 prop up, get the material in the space that supporting leg 62 propped up.

The working principle of the utility model is as follows:

when the material crusher is used, a material is placed into the crushing cavity 11 from the feeding hole 13, the rotating rod 14 is rotated at a high speed at the moment, the rotating rod 14 rotates to drive the crushing cutter 15 and the flying plate 16 to rotate, so that the material is crushed, the crushed material falls into the bottom of the crushing cavity 11, when the diameter of the material is smaller than that of the feeding hole 21, the material falls into the grinding cavity 12 through the feeding hole 21, the material is blown away by the flying plate 16 when the diameter of the material is larger than that of the feeding hole 21, at the moment, the material is blown away by the flying plate 16 rotating at a high speed because one surface of the flying plate 16 is lower than the other surface of the flying plate 16, the material is crushed again by the crushing cutter 15 until the diameter of the crushed material is smaller than that of the feeding hole 21 after being blown away, when the material enters a gap formed between the grinding block 31 in the grinding cavity 12 and the inner wall of the grinding cavity 12, the grinding block 31 rotates, the first grinding part 32 is matched with the second grinding part 33 to roll the material together, make the material crushing, in the last material gets into out feed cylinder 42 from relief hole 41, then outside discharging body 1, the material can appear scattering the condition of overflowing and can be restricted by anti-overflow portion 51 this moment when falling, can not make the material scatter, puts the container at body 1 bottom at last and can take out the material.

In summary, the following steps: this coal pulverizer is used in thermal power plant, through high-speed rotation dwang 14, dwang 14 rotates and drives broken sword 15 and hits and fly board 16 and rotate, make the material broken, can fall into broken chamber 11 bottom by broken material, the material can fall into grinding chamber 12 through feed port 21 when the diameter of material is less than the diameter of feed port 21, can be hit when the material diameter is greater than the diameter of feed port 21 and fly board 16 and hit and fly, so the material can hit and fly by high-speed rotatory hitting board 16 because the one side that hits and fly board 16 is less than the another side that hits and fly board 16 this moment, the material is hit and can be broken again by broken sword 15 after flying till being less than feed port 21 by broken material diameter, the current breakage is incomplete has been solved, incomplete burning when leading to final combustion, produce extravagant problem.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a coal pulverizer for thermal power plant, includes body (1), locates broken chamber (11) in body (1), locates grinding chamber (12) of broken chamber (11) bottom, locates the grinding part in grinding chamber (12), locates the broken part in broken chamber (11) and locates feed inlet (13) at body (1) top, its characterized in that: broken part is including locating dwang (14) in broken chamber (11), locating multiunit broken sword (15) on dwang (14) and locating dwang (14) bottom and broken chamber (11) inner bottom wall complex a plurality of hits and flies board (16), broken chamber (11) bottom cross-section is triangle-shaped, it sets up on dwang (14) to hit and flies board (16) slope.

2. The coal mill for thermal power plants of claim 1, wherein: a plurality of feeding holes (21) used for being communicated with the grinding cavity (12) are formed in the inner bottom wall of the crushing cavity (11).

3. The coal mill for thermal power plants of claim 1, wherein: the grinding part comprises a grinding block (31) arranged at the bottom of the rotating rod (14), a plurality of first grinding parts (32) arranged on the side wall of the grinding block (31) and a plurality of second grinding parts (33) arranged on the inner side wall of the grinding cavity (12) and matched with the first grinding parts (32), wherein the second grinding parts (33) are not positioned on the same plane with the first grinding parts (32).

4. The coal mill for thermal power plants of claim 1, wherein: be equipped with relief hole (41) on grinding chamber (12) diapire, relief hole (41) bottom is equipped with play feed cylinder (42), go out feed cylinder (42) bottom and body (1) inner diapire intercommunication.

5. The coal mill for thermal power plants of claim 4, wherein: an anti-overflow part (51) matched with the discharge barrel (42) is arranged on the outer bottom wall of the body (1).

6. The coal mill for thermal power plants of claim 1, wherein: the body (1) bottom is equipped with support ring (61) that is used for supporting body (1), support ring (61) bottom is equipped with a plurality of supporting legs (62).

Images