CN214637236U - Prevent impeller device and coal pulverizer of blowing loss - Google Patents
Prevent impeller device and coal pulverizer of blowing loss Download PDFInfo
- Publication number
- CN214637236U CN214637236U CN202022583227.7U CN202022583227U CN214637236U CN 214637236 U CN214637236 U CN 214637236U CN 202022583227 U CN202022583227 U CN 202022583227U CN 214637236 U CN214637236 U CN 214637236U
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- impeller device
- connecting piece
- guard flap
- impeller
- grinding bowl
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- Crushing And Pulverization Processes (AREA)
Abstract
The utility model discloses an impeller device of anti-blowing loss, impeller device is used on the coal pulverizer, impeller device includes connecting piece, guard flap, steady voltage regulating plate, blade and outer lane board, the blade is established the connecting piece with between the outer lane board, in airflow exit be equipped with steady voltage regulating plate on the blade with guard flap, guard flap establishes on the connecting piece, guard flap has the inclined plane with the air current contact. The surface of the protective baffle plate contacting with the air flow is set to be an inclined surface, so that the flow area of the air flow is reduced, the air speed and the air pressure are improved, the accumulation of pulverized coal is reduced, the vortex effect is avoided, the ventilation resistance is effectively reduced, and the abrasion of the impeller device is greatly reduced.
Description
Technical Field
The utility model relates to an equipment structure for the coal pulverizer, in particular to impeller device in coal pulverizer and the coal pulverizer.
Background
The medium speed coal mill is the main equipment for grinding coal powder in iron works and power plants at present, and the main working principle is as follows: raw coal is fed into a rotating grinding bowl through a coal feeding pipe at the center of the grinding machine, moves outwards along the radial direction to a grinding ring under the action of centrifugal force, and passes through a grinding roller device rotating around a shaft. The grinding roller device enables coal to form a coal bed under the grinding roller and grinds the coal into powder between the grinding ring and the grinding roller.
During the milling of the coal, smaller and lighter particles are continuously blown up from the milling bowl into the storage device by the action of the hot air. Besides fixing the grinding bowl, the impeller device can also blow air flow uniformly from the edge of the grinding bowl. The existing impeller device is easy to have vortex effect in the blowing process, so that the impeller device is seriously abraded. In addition, the bolt joint between the impeller device and the grinding bowl extension ring is easily damaged after 4000 hours of operation.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that the impeller device is seriously abraded due to the vortex effect easily generated in the blowing process, the invention provides the following technical scheme:
the utility model provides an impeller device of anti-blowing loss, impeller device is used on the coal pulverizer, impeller device includes connecting piece, guard flap, steady voltage regulating plate, blade and outer lane board, the blade is established the connecting piece with between the outer lane board, at airflow exit be equipped with on the blade steady voltage regulating plate with guard flap, guard flap establishes the connecting piece is last, guard flap has the inclined plane with the air current contact.
In one embodiment, the protective baffle is made of a bimetal composite steel plate with wear resistance.
In another embodiment, the substrate of the protective barrier is Q345B.
In another embodiment, the blades, the pressure stabilizing adjusting plate and the protective baffle form a popular airflow channel.
In another embodiment, the connecting piece comprises a longitudinal connecting portion, and the longitudinal connecting portion is connected with the grinding bowl extending ring along the axial direction of the impeller device.
In another embodiment, the connecting piece includes longitudinal connecting portion, and relative the installation department that longitudinal connecting portion buckled, guard flap establishes the outside of installation department.
Another embodiment comprises a fixing piece for fixing the connecting piece and the grinding bending extension ring, wherein the fixing piece extends and fixes the grinding bowl.
In another embodiment, the impeller device comprises a cover body arranged outside the outer ring plate, and the cover body can adjust the gap between the cover body and the guide device.
In another embodiment, the cover body is provided with an adjusting groove, and the cover body is fixed on the outer ring plate at the position of the adjusting groove through a detachable fixing piece.
Still provide the technical scheme of a coal pulverizer: the impeller device is arranged on the machine base, and the annular outer edge of the grinding bowl is fixed on the impeller device.
From the above disclosure, the impeller device is provided with the pressure stabilizing adjusting plate and the protective baffle at the airflow outlet, and the protective baffle is arranged on the connecting piece, and the two are used together to make the through-flow hole streamline, reduce the ventilation resistance and make the hot air distribution more uniform. In addition, the surface of the protective baffle, which is in contact with the airflow, is arranged to be an inclined surface, so that the flow area of the airflow is reduced, the wind speed and the wind pressure are improved, the accumulation of pulverized coal is reduced, the vortex effect is avoided, the ventilation resistance is effectively reduced, and the abrasion of the impeller device is greatly reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic top view of an impeller device
Fig. 2 is a partial sectional view taken along a-a of fig. 1.
Marking:
grinding a bowl 1; a connecting piece 2; a longitudinal connecting portion 11; a mounting portion 12; a blade 3; a cover body 4; a protective baffle 5; a fixing member 6; a voltage stabilizing adjustment plate 7; a guide device 8; an outer ring plate 9.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the embodiments shown in fig. 1-2.
An impeller device for use on a coal pulverizer is disclosed. The impeller device comprises a connecting piece 2, a protective baffle 5, a pressure stabilizing adjusting plate 7, blades 3 and an outer ring plate 9.
The blade 3 is established between connecting piece 2 and outer lane board 9, is equipped with steady voltage regulating plate 7 and guard flap 5 on airflow outlet department blade 3, and guard flap 5 establishes on connecting piece 2, guard flap 5 has the inclined plane with the air current contact.
The impeller device is through having set up steady voltage regulating plate 7 and guard flap 5 at airflow outlet department, and establish guard flap 5 on connecting piece 2, and the two uses simultaneously in coordination makes the discharge orifice be streamlined, and the draft resistance reduces, also makes hot-air distribution better even. In this time, still set up the face that guard flap 5 and air current contacted into the inclined plane for the flow area of air current reduces, improves the wind speed wind pressure and has reduced the buggy and piled up, has still avoided the vortex effect, has effectively reduced the draft resistance, greatly reduced impeller device's wearing and tearing.
In one embodiment, the protective baffle 5 is a bimetal clad steel plate with wear resistance. Have stronger stability can, can extremely effectually avoid the risk that impeller device drops from the frame of coal pulverizer. More preferably, the substrate material of the protective barrier 5 is Q345B, which further increases the stability and reliability of the protective barrier 5.
In another embodiment, the blades 3, the pressure stabilizing adjusting plate 7 and the protective baffle 5 form a popular airflow channel. Through the shape cooperation of the three, an airflow channel which is favorable for reducing the ventilation resistance is formed, the separation effect of the coal mill can be improved, and then the pulverized coal cannot be excessively accumulated on the impeller device, and the abrasion of the impeller device can also be reduced.
The connecting piece 2 is used for connecting with a grinding bowl 1 of a coal mill, and the connecting piece 2 is arranged around the outer edge of the grinding bowl 1 and is connected with the grinding bowl 1. The connecting piece 2 adopts an annular structure and is arranged around the outer edge of the grinding bowl 1. In another embodiment, a plurality of annular spaced apart connections are provided at the outer edge of the grinding bowl 1.
In another embodiment, the connecting member 2 includes a longitudinal connecting portion 11 and a mounting portion 12 bent with respect to the longitudinal connecting portion 11. The grinding bowl 1 extension ring is connected with the longitudinal connecting part 11 along the axial direction of the impeller device. Through extending the ring with connecting piece 2 and grinding bowl 1 on vertical and be connected, solved among the current impeller device and grinding bowl 1 and extend ring and adopt transverse connection mode mounting 6 easily by the blow-off, lead to the impeller device to drop easily in the coal pulverizer, damage the problem of other parts of coal pulverizer. Namely, the fixing piece 6 is not easy to be damaged, and the impeller device is prevented from falling off.
The protective baffle 5 is arranged on the outer side of the mounting part 12, the protective baffle 5 is tightly attached to the outer side surface of the mounting part 12, and the protective baffle 5 is fixed on the connecting piece 2 through welding means, so that the protective baffle 5 can have better stability and reliability in the using process.
The longitudinal connecting portion 11 and the mounting portion 12 are bent by about 90 degrees, a hole is formed in the longitudinal connecting portion 11, the fixing member 6 fixes the connecting member 2 and the fixing member 6 of the grinding bending extending ring, and the fixing member 6 extends and fixes the grinding bowl 1. The fixing adopts structures such as bolts and screws, which is convenient for the disassembly and assembly of the grinding bowl 1.
The blade 3 is arranged between the connecting piece 2 and the outer ring plate 9, the pressure stabilizing adjusting plate 7 and the protective baffle 5 are arranged on the blade 3 at the airflow outlet, the protective baffle 5 is arranged on the connecting piece 2, and the protective baffle 5 is provided with an inclined plane contacted with the airflow.
In another embodiment, the impeller device comprises a cover 4 arranged outside the outer ring plate 9, and the cover 4 can adjust the gap between the cover and the guide device 8. The cover 4 is provided with an adjustment groove, and the cover 4 is fixed to the outer ring plate 9 at the position of the adjustment groove by a detachable fixing member. The adjustment slot extends in the longitudinal direction and enables different conditions of the cover 4 to be adjusted towards or away from the guide 8. The gap generated between the impeller device and the guide device 8 is adjusted by arranging the adjustable cover body 4, so that the loss of primary air due to the gap in the blowing and attaching process can be effectively prevented.
In another embodiment, a coal mill comprises a base, a grinding bowl 1 and an impeller device in any one of the above embodiments, wherein the impeller device is arranged on the base, and the annular outer edge of the grinding bowl 1 is fixed on the impeller device.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and inventive features disclosed herein.
Claims (10)
1. An anti-blow-loss impeller device for use on a coal pulverizer, comprising: impeller device includes connecting piece, guard flap, steady voltage regulating plate, blade and outer lane board, the blade is established the connecting piece with between the outer lane board, at airflow outlet department be equipped with on the blade steady voltage regulating plate with guard flap, guard flap establishes on the connecting piece, guard flap has the inclined plane with the air current contact.
2. The impeller device of claim 1, wherein: the protective baffle is made of a bimetal composite steel plate with wear resistance.
3. The impeller device of claim 2, wherein: the substrate material of the protective baffle is Q345B.
4. The impeller device of claim 1, wherein: the blades, the pressure stabilizing adjusting plate and the protective baffle form a popular airflow channel.
5. The impeller device of claim 1, wherein: the connecting piece comprises a longitudinal connecting part, and the longitudinal connecting part is connected with the grinding bowl extending ring along the axial direction of the impeller device.
6. The impeller device of claim 1, wherein: the connecting piece includes longitudinal connecting portion, and relative the installation department that longitudinal connecting portion buckled, guard flap establishes the outside of installation department.
7. The impeller device of claim 5, wherein: the grinding bowl fixing device comprises a fixing piece for fixing the connecting piece and the grinding bowl extending ring, wherein the fixing piece extends and fixes the grinding bowl.
8. The impeller device of claim 1, wherein: the impeller device comprises a cover body arranged on the outer side of the outer ring plate, and the cover body can adjust the gap between the cover body and the guide device.
9. The impeller device of claim 8, wherein: the cover body is provided with an adjusting groove, and the cover body is fixed on the outer ring plate at the position of the adjusting groove through a fixing piece capable of being disassembled and assembled.
10. A coal pulverizer, characterized in that: comprising a machine base, a grinding bowl and an impeller device according to any one of claims 1 to 9, wherein the impeller device is arranged on the machine base, and the annular outer edge of the grinding bowl is fixed on the impeller device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022583227.7U CN214637236U (en) | 2020-11-10 | 2020-11-10 | Prevent impeller device and coal pulverizer of blowing loss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022583227.7U CN214637236U (en) | 2020-11-10 | 2020-11-10 | Prevent impeller device and coal pulverizer of blowing loss |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214637236U true CN214637236U (en) | 2021-11-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022583227.7U Active CN214637236U (en) | 2020-11-10 | 2020-11-10 | Prevent impeller device and coal pulverizer of blowing loss |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214637236U (en) |
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2020
- 2020-11-10 CN CN202022583227.7U patent/CN214637236U/en active Active
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