CN220027904U

CN220027904U - Coal mill structure

Info

Publication number: CN220027904U
Application number: CN202321564100.8U
Authority: CN
Inventors: 张晨; 焦广平; 赵琦; 刘延鹏; 王继凯
Original assignee: Jinan Jirong Energy Technology Co ltd
Current assignee: Jinan Jirong Energy Technology Co ltd
Priority date: 2023-06-19
Filing date: 2023-06-19
Publication date: 2023-11-17
Anticipated expiration: 2033-06-19

Abstract

The utility model belongs to the field of coal mills, and provides a coal mill structure which comprises a scraper seat, a scraper shaft, a connecting component and a scraper, wherein the connecting component comprises a fixed clamping plate, a movable clamping plate, a fixed flange, a movable flange, a torsion spring, a first nut and a second nut, clamping ends of the fixed clamping plate and the movable clamping plate are connected with the scraper, a scraping surface of the scraper is an inclined surface, a hanging buckle and a self-hanging plate are arranged on the back surface of the inclined surface, a triangular wedge surface extending towards the bottom surface of the scraper is arranged at the bottom of the self-hanging plate, and an elastic pressing plate is further arranged on the back surface of the inclined surface. The dynamic balance of the connecting component in the device can be kept under the influence of external force, which is beneficial to ensuring the scraping efficiency of the scraping plate and prolonging the actual service life of the scraping plate; the self-hanging plate, the elastic pressing plate and the scraping plate are also designed with inclined planes forming included angles with the self-hanging plate and the elastic pressing plate in the radial direction, so that the discharge efficiency of the coal mill is improved. The device has reasonable design, simple structure, higher scraping efficiency and longer service life, and is suitable for large-scale popularization.

Description

Coal mill structure

Technical Field

The utility model belongs to the field of coal mills, relates to a coal mill structure, and particularly relates to a scraper device for a coal mill.

Background

The coal mill is a machine for crushing and grinding coal blocks into coal powder, and is an important auxiliary device of a coal powder furnace. The coal grinding process is a process in which coal is crushed and the surface area thereof is continuously increased. Coal is ground into pulverized coal in a coal mill, and is mainly carried out in three modes of crushing, shredding and grinding. The scraper device of the coal mill is a device for discharging pebble coal in the coal mill from a side machine body, and each coal mill is generally provided with at least two scraper devices, is arranged below a millstone of the coal mill, rotates synchronously with the millstone and cleans the pebble coal in the rotating process.

The utility model discloses a coal pulverizer spring scraper device and coal pulverizer of current patent CN202120441565.9, belongs to the coal pulverizer technical field, including scraper blade seat, scraper blade axle, scraper blade and torsional spring, the scraper blade seat is used for fixing the bottom at the mill of coal pulverizer; the scraper shaft is fixedly arranged on the scraper seat; the scraping plate is rotatably arranged on the scraping plate shaft; the torsional spring is installed on the scraper blade axle, and links to each other with the scraper blade for provide torsion for the scraper blade. According to the spring scraper device of the coal mill, torsion is provided for the scraper through the torsion spring, when stone coal is cleaned and scraped, the scraper can keep a sagged posture when the scraper is rotationally scraped under the action of the torsion spring, the scraper can provide larger thrust, and the effect of cleaning and scraping the stone coal is greatly improved; because the elasticity of the torsion spring can play a role in buffering the action of the scraping plate, the impact force between the scraping plate and the larger stone coal or the heavier obstacle can be buffered, the impact abrasion degree of the scraping plate is reduced, and the service life of the scraping plate is prolonged. However, because a certain gap exists between the opposite surface of the scraper and the millstone seat, the blind area is scraped, and the scraper is positioned at a plurality of positions which are radially arranged, a part of coal stones cannot be scraped away in time and can be blocked at the end part of the scraper, so that the subsequent scraping performance of the scraper is affected; secondly, although the torsion spring of the device provides buffering for the scraper, once the scraper overturns too much, the scraper can cross the cobble, so that the work load of the later scraper is increased, and the discharging efficiency of the coal mill and the service life of the scraper are influenced.

Disclosure of Invention

Aiming at the technical problems of the spring scraper device for the coal mill, the utility model provides a coal mill structure which is reasonable in design, simple in structure, high in scraping efficiency and long in service life.

In order to achieve the above purpose, the technical scheme includes that the coal mill structure comprises a scraper seat, a scraper shaft is arranged on the scraper seat, a connecting component is arranged on the scraper shaft, a scraper is arranged at the bottom of the connecting component, the connecting component comprises a fixed clamping plate connected with the scraper shaft through a key and a movable clamping plate rotationally matched with the scraper shaft, a fixed flange and a movable flange are respectively arranged at opposite sides of the fixed clamping plate and the movable clamping plate, a torsion spring is arranged between the fixed flange and the movable flange, a first nut and a second nut which are tightly matched with the fixed clamping plate and the movable clamping plate are arranged at two ends of the scraper shaft, clamping ends of the fixed clamping plate and the movable clamping plate are connected with the scraper, a pair of waist-shaped holes are formed in the scraper, bolts connected with the fixed clamping plate and the movable clamping plate are arranged in the waist-shaped holes, a scraping surface of the scraper is an inclined surface, a hanging buckle is arranged at the back surface of the inclined surface, a self-hanging plate is arranged on the hanging buckle, a triangular surface extending towards the bottom surface of the scraper is arranged at the bottom of the self-hanging plate, an elastic bending section is further arranged towards the back surface of the movable bending section, and the elastic bending section is arranged at the back surface of the inclined section and is further contacted with the movable bending section by the elastic bending section.

Preferably, one side of the scraper blade seat is an arc surface, a first step surface, a second step surface and a third step surface which are distributed in three levels are arranged on the other side of the arc surface, screw holes are formed in the first step surface and the second step surface, and the third step surface is used for installing a scraper shaft.

Preferably, the clamping calibers of the fixed clamping plate and the movable clamping plate gradually decrease from top to bottom.

Preferably, the self-hanging plate comprises a hanging part matched with the hanging buckle, a back plate part is arranged on the outer side of the hanging part, and a wedge plate part is arranged at the bottom of the back plate part.

Preferably, the first bending section is provided with a Z-shaped connecting section on one side of the first bending section facing the self-hanging plate, a pair of screws connected with the scraping plate are arranged on the connecting section, and a second bending section matched with the self-hanging plate in a contact mode is arranged at the end portion of the connecting section.

Compared with the prior art, the utility model has the advantages and positive effects that:

1. according to the coal mill structure provided by the utility model, the scraping plate can generate local deformation under the condition of uneven stress, and the dynamic balance of the connecting component can be kept under the influence of external force, so that the scraping efficiency of the scraping plate is ensured, and the actual service life of the scraping plate is prolonged; the self-hanging plate automatically drops due to the self weight after being hung on the hanging buckle, and particularly, the triangular wedge surface ensures that the scraping plate has a relatively complete scraping plane, thereby being beneficial to improving the scraping efficiency; the elastic pressing plate can apply short-amplitude vibration to the coal stone close to the joint of the scraping plate and the millstone seat, so that the coal stone is prevented from being clamped in the scraping blind area of the scraping plate, the inclined plane forming an included angle with the scraping plate in the radial direction is designed on the scraping plate, the guiding effect on the coal stone can be achieved, and the discharge efficiency of the coal mill is improved. The device has reasonable design, simple structure, higher scraping efficiency and longer service life, and is suitable for large-scale popularization.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an isometric view of a coal pulverizer structure according to an embodiment;

FIG. 2 is an isometric view of a coal pulverizer structure in another direction as provided by the embodiments;

FIG. 3 is a side view of a coal pulverizer structure according to an embodiment;

FIG. 4 is an isometric view of a self-contained strap provided by an embodiment;

FIG. 5 is a side view of a self-hanging plate provided by an embodiment;

FIG. 6 is an isometric view of an elastic platen provided by an embodiment;

in the above figures, 1, a scraper seat; 1a, an arc surface; 1b, a first step surface; 1c, a second step surface; 1d, a third step surface; 1e, screw holes; 2. a scraper shaft; 3. a connection assembly; 31. a fixed clamping plate; 32. a movable clamping plate; 33. a fixed flange; 34. a movable flange; 35. a torsion spring; 36. a first nut; 37. a second nut; 38. a bolt; 4. a scraper; 41. an inclined plane; 5. hanging buckle; 6. a self-hanging plate; 61. triangular wedge surfaces; 62. a hanging part; 63. a back plate portion; 64. wedge plate portion; 7. an elastic pressing plate; 71. a first bending section; 72. a contact section; 73. a connection section; 74. a second bending section; 8. and (5) a screw.

Detailed Description

In order that the above objects, features and advantages of the utility model will be more clearly understood, a further description of the utility model will be rendered by reference to the appended drawings and examples. It should be noted that, without conflict, the embodiments of the present utility model and features in the embodiments may be combined with each other. For convenience of description, the words "upper", "lower", "left" and "right" are merely used herein to denote a correspondence with the upper, lower, left, and right directions of the drawing figures, and are not limiting on the structure.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, however, the present utility model may be practiced otherwise than as described herein, and therefore the present utility model is not limited to the specific embodiments of the disclosure that follow.

The embodiment is shown in fig. 1 to 6, and the coal mill structure provided by the utility model comprises a scraper seat 1, wherein a scraper shaft 2 is arranged on the scraper seat 1, a connecting component 3 is arranged on the scraper shaft 2, and a scraper 4 is arranged at the bottom of the connecting component 3. The scraper seat 1 is arranged on the side surface of the millstone, and drives the scraper 4 to synchronously rotate along with the rotation of the millstone, so that coal falling into the coal mill is scraped. On the basis, in order to improve the discharging efficiency of a coal mill, the connecting component 3 provided by the utility model comprises a fixed clamping plate 31 connected with a scraper shaft 2 through a key and a movable clamping plate 32 in rotary fit with the scraper shaft 2, wherein the opposite sides of the fixed clamping plate 31 and the movable clamping plate 32 are respectively provided with a fixed flange 33 and a movable flange 34, a torsion spring 35 is arranged between the fixed flange 33 and the movable flange 34, two ends of the scraper shaft 2 are provided with a first nut 36 and a second nut 37 which are tightly matched with the fixed clamping plate 31 and the movable clamping plate 32, clamping ends of the fixed clamping plate 31 and the movable clamping plate 32 are connected with the scraper 4, a pair of waist-shaped holes are formed in the scraper 4, bolts 38 connected with the fixed clamping plate 31 and the movable clamping plate 32 are arranged in the waist-shaped holes, the scraping surface of the scraper 4 is an inclined surface 41, the back surface of the inclined surface 41 is provided with a hanging buckle 5, the hanging buckle 5 is provided with a self-hanging plate 6, the back of the inclined surface 41 is further provided with an elastic pressing plate 7, the elastic pressing plate 7 comprises a first bending section 71 extending towards one end of the scraper 4, and the tail end 71 is provided with a movable bending section 72 for contacting with a grinding disc 72.

Specifically, the scraping plate 4 can generate local deformation under the condition of uneven stress, the movable clamping plate 32 and the movable flange 34 are driven to generate small-amplitude torsion, the torsion torque is transmitted to the torsion spring 35, the torsion spring 35 is used as a main balancing piece, the whole connecting assembly 3 can be quickly restored to balance under the influence of external force, and the dynamic restoring capability enables the scraping plate 4 to keep certain flexibility and rigidity, so that the scraping efficiency of the scraping plate 4 is improved, and the actual service life of the scraping plate 4 is prolonged. The self-hanging plate 6 automatically drops down due to the self-weight after being hung on the hanging buckle 5, and is always connected with the hanging buckle 5, the actual combined area of the self-hanging plate and the scraping plate 4 changes along with the height and angle change of the scraping plate 4, but the triangular wedge surface 61 is always and effectively lined at the bottom of the self-hanging plate 6, so that the scraping plate 4 has relatively complete scraping planes under different postures, and the scraping efficiency of the self-hanging plate is improved. Further, an elastic pressing plate 7 is arranged between the scraping plate 4 and a millstone seat in the coal mill, the contact section 72 of the elastic pressing plate is subjected to stirring force from the millstone seat, the first bending section of the elastic pressing plate has vibration with a certain frequency, and the vibration applies power to coal stones close to the joint of the scraping plate 4 and the millstone seat so as to prevent the coal stones from being blocked in a scraping blind area of the scraping plate 4; meanwhile, the scraper 4 is also provided with an inclined plane 41 which forms an included angle with the radial direction of the scraper, so that the scraper can guide coal stones, and the coal stones can be promoted to efficiently flow towards the discharge port of the coal mill under the centrifugal action and the scraping action, thereby improving the discharge efficiency of the coal mill.

In order to improve the connection reliability of the scraper blade seat 1 and the millstone, one side of the scraper blade seat 1 provided by the novel scraper blade seat is an arc surface 1a, a first step surface 1b, a second step surface 1c and a third step surface 1d which are distributed in three levels are arranged on the other side of the arc surface, screw holes are formed in the first step surface 1b and the second step surface 1c, and the third step surface 1d is used for installing the scraper blade shaft 2. In this way, not only the arc surface 1a matched with the grinding disc is designed to increase the connection area of the two, but also the connection nodes are increased through screws distributed in multiple stages, so that the connection reliability of the scraper seat 1 on the grinding disc is improved.

In order to improve the connection performance of the scraping plate 4 and the connecting component 3, the clamping calibers of the fixed clamping plate 31 and the movable clamping plate 32 provided by the utility model are gradually reduced from top to bottom, the bottom ends of the fixed clamping plate 31 and the movable clamping plate 32 directly clamp the scraping plate 4, and the part larger than the thickness of the scraping plate 4 is in the form of an open shoulder, so that the scraping performance of the whole connecting component 3 and the scraping plate 4 can be effectively improved by adopting an elastic plate. Wherein, the fixed clamping plate 31 and the movable clamping plate 32 both comprise shaft sleeves, key grooves are arranged in the shaft sleeves of the fixed clamping plate 31 and are matched with key structures arranged on the scraper shaft 2, the shaft sleeves of the movable clamping plate 32 are smooth surfaces, and the movable clamping plate 32 can rotate around the scraper shaft 2 by a certain angle under the action of force; the outside of axle sleeve all is provided with the centre gripping arm of pair, and the centre gripping arm is used for centre gripping scraper blade 4.

In order to improve the practicability of the self-hanging plate 6, the self-hanging plate 6 in the device comprises a hanging part 62 matched with the hanging buckle 5, the hanging part 62 has an L-shaped structure and can be directly hung on the opening part of the C-shaped hanging buckle 5 or the U-shaped hanging buckle 5, a back plate part 63 is arranged on the outer side of the hanging part 62, a wedge plate part 64 is arranged at the bottom of the back plate part 63, and the surface of the wedge plate part 64 forms a triangular wedge surface 61.

In order to improve the flicking performance of the elastic pressing plate 7 on the coal stone, a zigzag connecting section 73 is arranged on one side of the first bending section 71 facing the self-hanging plate 6, a pair of screws 8 connected with the scraping plate 4 are arranged on the connecting section 73, the connecting section 73 is positioned and fixed by the screws 8, the contact section 72 and the first bending section 71 are movable free ends, and elasticity can be generated to flick the coal stone. In order to improve the stability of the self-hanging plate 6, the end part of the connecting section 73 is provided with a second bending section 74 which is in contact fit with the self-hanging plate 6, and the self-hanging plate 6 is extruded by the second bending section 74 to increase the pressure between the two.

The present utility model is not limited to the above-mentioned embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical substance of the present utility model without departing from the technical content of the present utility model still belong to the protection scope of the technical solution of the present utility model.

Claims

1. The utility model provides a coal pulverizer structure, includes the scraper blade seat, be provided with the scraper blade axle on the scraper blade seat, be provided with coupling assembling on the scraper blade axle, coupling assembling's bottom is provided with the scraper blade, a serial communication port, coupling assembling include with the scraper blade axle pass through the fixed splint of key-type connection and with the rotatory complex movable clamp plate of scraper blade axle, the opposite side of fixed splint and movable clamp plate is provided with flange and movable flange respectively, be provided with the torsional spring between fixed flange and the movable flange, the both ends of scraper blade axle are provided with fixed splint and movable clamp plate tight fit's first nut and second nut, the clamping end of fixed splint and movable clamp plate all is connected with the scraper blade, be provided with a pair of waist type hole on the scraper blade, be provided with the bolt of being connected with fixed splint and movable clamp plate in the waist type hole, the back on inclined plane is provided with the hanging knot, be provided with from the link, the bottom of hanging the board is provided with towards the triangle wedge face that the scraper blade bottom surface extends, the back of inclined plane still is provided with the elastic pressing plate, the elastic pressing plate includes towards the first bending section of scraper blade and the end contact section that the end is provided with the mill.

2. The coal mill structure according to claim 1, wherein one side of the scraper seat is an arc surface, a first step surface, a second step surface and a third step surface which are distributed in three levels are arranged on the other side of the arc surface, screw holes are formed in the first step surface and the second step surface, and the third step surface is used for installing a scraper shaft.

3. The coal pulverizer structure of claim 2, wherein the fixed and movable cleats have a smaller gripping diameter from top to bottom.

4. The coal pulverizer structure of claim 3, wherein the self-hanging plate comprises a hanging portion engaged with the hanging buckle, a back plate portion is disposed on the outer side of the hanging portion, and a wedge plate portion is disposed at the bottom of the back plate portion.

5. The coal pulverizer structure of claim 4, wherein the first bending section is provided with a zigzag connecting section on a side facing the self-hanging plate, a pair of screws connected with the scraping plate are arranged on the connecting section, and a second bending section in contact fit with the self-hanging plate is arranged at the end of the connecting section.