CN214416562U

CN214416562U - Enhanced ceramic composite roller sleeve applied to medium-speed coal mill in thermal power plant

Info

Publication number: CN214416562U
Application number: CN202120146255.4U
Authority: CN
Inventors: 刘义成; 徐日庆
Original assignee: Jiangsu Risheng Electric Power Machine Co ltd
Current assignee: Jiangsu Risheng Electric Power Machine Co ltd
Priority date: 2021-01-20
Filing date: 2021-01-20
Publication date: 2021-10-19
Anticipated expiration: 2031-01-20

Abstract

The utility model relates to a medium speed coal mill accessory technical field specifically is a be applied to compound roller shell of enhancement mode pottery of medium speed coal mill in thermal power factory, the outside of roller shell is located middle section position department and is fixed with grinding roller cover bulge loop, the both sides that grinding roller cover bulge loop are located border position department and all evenly set up twenty four bulge loop screw holes that are the circumference and arrange. The utility model discloses, through components of a whole that can function independently roller shell mechanism, with the outside board concatenation of milling in the outside of grinding the roller shell, when the board of milling damages, only need to change the components of a whole that can function independently roller shell mechanism at the board place of milling of damage, need not to change the whole board of milling, maintenance duration has not only been saved, and cost of maintenance has been reduced, through damping ring with outside board of milling and grinding roller shell elastic connection, can absorb the impact force that outside board of milling and coal cinder produced, reduce the damage probability of outside board of milling, increase of service life.

Description

Enhanced ceramic composite roller sleeve applied to medium-speed coal mill in thermal power plant

Technical Field

The utility model relates to a medium speed coal mill accessory technical field specifically is a be applied to compound roller shell of enhancement mode pottery of medium speed coal mill in thermal power factory.

Background

A large amount of coal is needed in the operation of a thermal power plant, and in order to enable the coal to be fully combusted and improve the combustion efficiency, a coal mill is needed to be used for grinding coal blocks, so that the coal blocks are changed into coal powdered carbon. The coal mill is a machine for crushing and grinding coal briquettes into coal powder, is an important auxiliary device of a coal powder furnace, and has various models such as a vertical mill, a high-pressure suspension roller mill, a medium-speed micro-powder mill, an overpressure trapezoidal mill, a Raymond mill and the like; the rotational speed of the massage coal working member can be classified into three types, i.e., a low-speed coal mill, a medium-speed coal mill, and a high-speed coal mill.

A low-speed coal mill mainly is a roller type steel ball mill, generally called steel ball mill or ball mill for short, and is a rotating cylindrical roller or a roller with two conical ends, the roller is internally provided with steel balls, the rotating speed of the roller is 15-25 rpm, when the low-speed coal mill is in use, the steel balls in the roller continuously impact and extrude coal briquettes to mill the coal briquettes of the coal mill into coal dust, then the coal is dried by hot air introduced into the roller and sent out, after separation by a separator, the coal dust with certain granularity is sent into a coal dust bin or directly into a coal dust burner, and the low-speed coal mill is heavy, high in power consumption and large in noise, but has wide application range to coal types and reliable in operation, and is particularly suitable for milling hard anthracite.

The common characteristics of the medium-speed coal mill are that the grinding part is composed of two groups of grinding bodies which move relatively, coal blocks are extruded and ground between the surfaces of the two groups of grinding bodies, the coal blocks are crushed by introducing hot air into the coal mill to dry the coal, the coal powder is sent to a separator at the upper part of a grinding area, the separated coal powder with a certain granularity is taken out of the mill along with air flow, and the coal powder with coarse particles is returned to the grinding area for re-grinding.

The high-speed coal mill has the rotating speed of 500-1500 rpm, mainly comprises a high-speed rotor and a mill shell, is commonly provided with a fan mill, a hammer mill and the like, coal briquettes are impacted with the mill shell at high speed by the high-speed rotor in the fan mill and collide with each other, and the coal briquettes are ground by mutual impact.

In the operation of the medium-speed coal mill, coal and the like impact and wear the roller sleeve of the coal mill during operation, so that the indentation appears on the surface of the roller sleeve after long-time use, which affects normal use, and the roller sleeve needs to be maintained and replaced regularly.

However, when the existing roller sleeve is damaged, the whole roller sleeve needs to be replaced, and the damaged part cannot be replaced, so that the difficulty of replacement and maintenance is increased, the replacement and maintenance cost is increased, the existing roller sleeve does not have the function of absorbing impact force, and the damage probability of the roller sleeve is increased when harder coal briquettes are milled. Accordingly, one skilled in the art provides an enhanced ceramic composite roll shell for a medium speed coal mill in a thermal power plant to solve the above problems in the background art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a be applied to thermal power factory intermediate speed coal pulverizer's compound roller shell of enhancement mode pottery to solve the problem that provides in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a be applied to compound roller shell of enhancement mode pottery of thermal power factory intermediate speed coal pulverizer, includes the grinding roller cover, the outside of grinding roller cover is located middle section position department and is fixed with grinding roller cover bulge loop, the both sides that grinding roller cover bulge loop are located border position department and all evenly set up twenty four bulge loop screw holes that are circumference range, the outer outside position department that is located grinding roller cover bulge loop of edge of grinding roller cover cup joints and is provided with eight components of a whole that can function independently roller shell mechanisms that are circumference range.

As a further aspect of the present invention: the board installation lantern ring that mills in the mill roller cover bulge loop outside is located including the cover to components of a whole that can function independently roller shell mechanism, the position department that the both sides of the board installation lantern ring of milling correspond six bulge loop screw holes all rotates and inserts and be equipped with set screw, six set screw's one end all rotates the inboard of connecting in six bulge loop screw holes through the screw thread, the outside of the board installation lantern ring of milling is located middle section position department and is fixed with solid fixed ring, gu fixed ring's the outside is fixed with the damping ring, the outside position department that is located solid fixed ring and damping ring along the outer edge of the board installation lantern ring of milling cup joints and is fixed with the outside milling board.

As a further aspect of the present invention: the damping ring adopts the component of rubber material, the grinding plate installation lantern ring all adopts stainless steel's component with solid fixed ring.

As a further aspect of the present invention: the outside grinding plate is made of a component made of composite ceramic materials, and the inner side of the outside grinding plate is in interference fit with the outer side of the damping ring.

As a further aspect of the present invention: the grinding roller sleeve convex ring and the grinding roller sleeve are formed by turning, and the width of the grinding roller sleeve convex ring is 0.8 times of the width of the grinding roller sleeve.

As a further aspect of the present invention: grinding roller sleeve mounting holes which are arranged circumferentially are formed in the positions, located on the inner edge, of the two sides of the grinding roller sleeve, and internal threads are formed in the inner sides of the grinding roller sleeve mounting holes.

Compared with the prior art, the beneficial effects of the utility model are that:

1. through components of a whole that can function independently roller shell mechanism, mill the board with the outside and splice in the outside of grinding roller shell, when the board of milling damages, only need to change the components of a whole that can function independently roller shell mechanism that the board of milling that damages was located, need not to mill the board change wholly, not only saved maintenance time, reduced cost of maintenance moreover.

2. Through the damping ring with outside grinding plate and grinding roller cover elastic connection, can absorb the impact force that outside grinding plate and coal cinder produced, reduce the damage probability of outside grinding plate, increase of service life.

3. The outer side grinding plate is made of a component made of composite ceramic materials, has high strength and good wear resistance, and prolongs the service life of the outer side grinding plate.

Drawings

FIG. 1 is a schematic structural diagram of an enhanced ceramic composite roll sleeve applied to a medium-speed coal mill in a thermal power plant;

FIG. 2 is a schematic structural diagram of the interior of an enhanced ceramic composite roll sleeve applied to a medium-speed coal mill in a thermal power plant;

fig. 3 is an enlarged schematic structural view of a portion a in fig. 2 of an enhanced ceramic composite roll shell applied to a medium-speed coal mill in a thermal power plant.

In the figure: 1. grinding a roller sleeve; 2. a grinding roller is sleeved with a convex ring; 3. a convex ring screw hole; 4. mounting a lantern ring on the grinding plate; 5. a set screw; 6. a fixing ring; 7. a shock-absorbing ring; 8. an outer grinding plate; 9. and (5) grinding roller sleeve mounting holes.

Detailed Description

Please refer to fig. 1-3, in the embodiment of the present invention, an enhanced ceramic composite roller sleeve for a medium speed coal pulverizer in a thermal power plant, includes a roller sleeve 1, a roller sleeve convex ring 2 is fixed at the middle position of the outer side of the roller sleeve 1, twenty-four convex ring screw holes 3 arranged in a circumferential direction are uniformly provided at the edge position of both sides of the roller sleeve convex ring 2, and eight split roller sleeve mechanisms arranged in a circumferential direction are sleeved at the outer position of the roller sleeve 1 located at the outer side of the roller sleeve convex ring 2.

In fig. 3: the split roller sleeve mechanism comprises a milling plate mounting sleeve ring 4 sleeved outside a milling roller sleeve convex ring 2, fixing screws 5 are rotatably inserted in positions, corresponding to six convex ring screw holes 3, of two sides of the milling plate mounting sleeve ring 4, one ends of the six fixing screws 5 are rotatably connected to the inner sides of the six convex ring screw holes 3 through threads, a fixing ring 6 is fixed at the middle section position of the outer side of the milling plate mounting sleeve ring 4, a damping ring 7 is fixed at the outer side of the fixing ring 6, an outer side milling plate 8 is fixedly sleeved at the outer side positions, located at the fixing ring 6 and the damping ring 7, of the outer edge of the milling plate mounting sleeve ring 4, the outer side milling plate 8 is spliced outside the milling roller sleeve 1, when the grinding plate is damaged, only the split roller sleeve mechanism where the damaged grinding plate is located needs to be replaced, the whole grinding plate does not need to be replaced, maintenance time is saved, and maintenance cost is reduced.

In fig. 3: damping ring 7 adopts the component of rubber material, and the board installation lantern ring 4 that mills all adopts stainless steel's component with solid fixed ring 6, through damping ring 7 with outside grinding plate 8 and grinding roller cover 1 elastic connection, can absorb the impact force that outside grinding plate 8 and coal cinder produced, reduces the damage probability of outside grinding plate 8, increase of service life.

In fig. 3: the outside grinding plate 8 is made of a composite ceramic material, the inner side of the outside grinding plate 8 is in interference fit with the outer side of the damping ring 7, the outside grinding plate 8 is made of a composite ceramic material, and the outside grinding plate has high strength and good wear resistance and prolongs the service life of the outside grinding plate 8.

In fig. 3: the grinding roller sleeve convex ring 2 and the grinding roller sleeve 1 are formed by turning, the width of the grinding roller sleeve convex ring 2 is 0.8 times of that of the grinding roller sleeve 1, and the turning has better firmness.

In fig. 1: the grinding roller sleeve mounting holes 9 which are arranged circumferentially are formed in the positions, located along the inner edges, of the two sides of the grinding roller sleeve 1, internal threads are formed in the inner sides of the grinding roller sleeve mounting holes 9, and the grinding roller sleeve mounting holes 9 are used for mounting the roller sleeve.

The utility model discloses a theory of operation is: firstly, a grinding roller sleeve 1 is sleeved and connected with the outer side of a grinding roller, then the grinding roller sleeve 1 is fixed through a screw and a grinding roller sleeve mounting hole 9, after the fixing is finished, a grinding plate mounting sleeve ring 4 at one side of a split roller sleeve mechanism is sleeved and arranged at the outer side of a grinding roller sleeve convex ring 2, then the grinding plate mounting sleeve ring 4 is fixed through the rotary connection between six fixing screws 5 and six convex ring screw holes 3, the six fixing screws 5 are reversely rotated and screwed off, the split roller sleeve mechanism can be detached, the installation and the detachment are convenient, the maintenance time is saved, the eight split roller sleeve mechanisms can be independently installed and detached, only the damaged split roller sleeve mechanism needs to be replaced during the maintenance, so that the outer grinding plate 8 can be replaced, the whole roller sleeve does not need to be detached and replaced, the maintenance time is saved, the maintenance cost is reduced, when the roller sleeve runs, coal blocks are ground between the outer grinding plate 8 and a grinding disc, adopt the damping ring 7 of rubber material to have good elasticity, when outside grinding plate 8 received the impact of harder coal cinder, outside grinding plate 8 can carry out a certain amount of compression with damping ring 7, makes temporarily increase the clearance between outside grinding plate 8 and the mill, can reduce the impact that the coal cinder caused to outside grinding plate 8, reduces outside grinding plate 8's damage probability to help increase of service life.

The above-mentioned, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a be applied to compound roller cover of enhancement mode pottery of thermal power factory intermediate speed coal pulverizer, includes grinding roller cover (1), its characterized in that, the outside of grinding roller cover (1) is located middle section position department and is fixed with grinding roller cover bulge loop (2), the both sides of grinding roller cover bulge loop (2) are located border position department and all evenly set up twenty four bulge loop screw holes (3) that are the circumference and arrange, the outer border position department that is located grinding roller cover bulge loop (2) of grinding roller cover (1) cup joints and is provided with eight components of a whole that can function independently roller cover mechanisms that are the circumference and arrange.

2. The enhanced ceramic composite roll sleeve applied to a medium-speed coal mill in a thermal power plant according to claim 1, it is characterized in that the split roller sleeve mechanism comprises a milling plate mounting lantern ring (4) sleeved outside a milling roller sleeve convex ring (2), fixing screws (5) are rotatably inserted into positions, corresponding to the six convex ring screw holes (3), of two sides of the milling plate mounting lantern ring (4), one ends of the six fixing screws (5) are rotatably connected to the inner sides of the six convex ring screw holes (3) through threads, a fixing ring (6) is fixed at the middle section position outside the milling plate mounting lantern ring (4), the outside of solid fixed ring (6) is fixed with damping ring (7), the outer position department that is located solid fixed ring (6) and damping ring (7) along the outer edge of the grinding plate installation lantern ring (4) cup joints and is fixed with outside grinding plate (8).

3. The enhanced ceramic composite roll sleeve applied to the coal pulverizer in the thermal power plant is characterized in that the damping ring (7) is made of a rubber component, and the grinding plate mounting sleeve ring (4) and the fixing ring (6) are made of stainless steel components.

4. The enhanced ceramic composite roller sleeve applied to the medium-speed coal mill in the thermal power plant is characterized in that the outer side grinding plate (8) is made of a composite ceramic material, and the inner side of the outer side grinding plate (8) is in interference fit with the outer side of the damping ring (7).

5. The enhanced ceramic composite roll sleeve applied to the medium-speed coal mill in the thermal power plant is characterized in that the part between the grinding roll sleeve convex ring (2) and the grinding roll sleeve (1) is formed by turning, and the width of the grinding roll sleeve convex ring (2) is 0.8 times of the width of the grinding roll sleeve (1).

6. The enhanced ceramic composite roll sleeve applied to the medium-speed coal mill in the thermal power plant is characterized in that grinding roll sleeve mounting holes (9) which are circumferentially arranged are formed in positions, located on the inner edge, of two sides of the grinding roll sleeve (1), and internal threads are formed in the inner sides of the grinding roll sleeve mounting holes (9).