CN217272706U - Sealing device for fan coal mill - Google Patents
Sealing device for fan coal mill Download PDFInfo
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- CN217272706U CN217272706U CN202122867295.0U CN202122867295U CN217272706U CN 217272706 U CN217272706 U CN 217272706U CN 202122867295 U CN202122867295 U CN 202122867295U CN 217272706 U CN217272706 U CN 217272706U
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- coal mill
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- sealing device
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model discloses a fan coal mill sealing device, which comprises a coal mill gate, an expansion joint mechanism and a high-temperature furnace smoke pipeline, and is characterized in that a sealing filler groove is fixedly arranged on the inlet of the coal mill gate along the horizontal direction, and sealing filler is filled in the sealing filler groove; the fixed sealing ring that is provided with of horizontal direction is followed down to the telescopic joint mechanism, just the sealing ring follows the downward movement of telescopic joint mechanism falls the inside in order to compress tightly the gland packing of gland packing inslot, the utility model discloses a sealing device can effectively avoid calorific loss and leak out, leak phenomenons such as powder, improves the degree of safety.
Description
Technical Field
The utility model relates to a coal pulverizer seals technical field, and more specifically the saying so relates to a fan coal pulverizer gate closure adjustment and telescopic joint sealing device.
Background
The Huanen Heilal thermal power plant # 1 and #2 furnaces have 12 fan coal mills in total, and the inlet of each fan coal mill and the tail of a smoke pipeline of the high-temperature furnace are provided with telescopic joint mechanisms which are matched with the inlet of a gate of the coal mill for sealing. The telescopic joint mechanism can move along the smoke pipeline of the high-temperature furnace in the radial direction, and specifically, before the coal mill runs, the hand wheel can be operated to move the telescopic joint downwards to the upper edge plane of the gate inlet of the coal mill for sealing; when the coal mill is overhauled, the hand wheel can be operated to move the expansion joint upwards to perform other corresponding operations.
The traditional expansion joint sealing mechanism usually realizes sealing by matching an upper edge plane of a gate inlet of a coal mill with a lower edge plane of an expansion joint, so that gaps are easily generated, and the phenomena of air leakage, heat leakage, powder leakage and the like exist. In addition, the coal mill has deformation of different degrees in the closing process of the gate after multiple overhauls, the situation that the sealing surface cannot tightly compact the gate packing still exists after the locking bolt of the gate is fastened in place, the deformation degrees of the sealing surface of the gate of each coal mill are different, and the situations of air leakage and powder leakage of different degrees exist.
Therefore, an urgent need exists in the art to provide a device for adjusting the closing of a gate and sealing an expansion joint of a fan coal mill.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a fan coal pulverizer sealing device can effectively avoid calorific loss and phenomenons such as leaking out, leaking powder, improves the degree of safety.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a sealing device of a fan coal mill comprises a coal mill gate, an expansion joint mechanism and a high-temperature furnace smoke pipeline, wherein a sealing filler groove is fixedly arranged on an inlet of the coal mill gate along the horizontal direction, and sealing fillers are filled in the sealing filler groove; and a sealing ring is fixedly arranged below the telescopic joint mechanism along the horizontal direction, and the sealing ring falls into the sealing filler groove along with the downward movement of the telescopic joint mechanism so as to compress the sealing filler.
The utility model discloses an above-mentioned fan coal pulverizer sealing device can effectively eliminate the not tight condition of telescopic joint mechanism and coal pulverizer gate cooperation.
Preferably, in the sealing device for the fan coal mill, the sealing filler groove is composed of two concentric rings with different diameters.
Preferably, in the above-mentioned fan coal mill sealing device, the diameter of the sealing ring is larger than the diameter of the small ring of the packing groove and smaller than the diameter of the large ring of the packing groove.
Preferably, in the sealing device for the fan coal mill, the sealing filler is a graphite nickel-based packing.
Preferably, in the sealing device for the fan coal mill, the outer side of the sealing filler groove abuts against the upper edge of the entrance of the coal mill gate through a triangular rib.
Preferably, in the sealing device for the fan coal mill, the fastening bolt of the coal mill gate is made of 20G.
Preferably, in the sealing device for the fan coal mill, the horizontal axial distance between the joint surface of the coal mill gate and the coal mill casing is adjusted, so that the coal mill gate and the coal mill casing are tightly combined without staggered openings.
Can know via foretell technical scheme, compare with prior art, the utility model discloses a closed adjustment in fan coal pulverizer gate and telescopic joint sealing device has following beneficial effect:
(1) the heat loss of the inlet of the coal mill can be reduced, the inlet temperature of the coal mill is improved, and the output of the coal mill is increased;
(2) the coal powder is prevented from leaking through the expansion joint, the coal powder accumulated at the inlet of the coal mill is eliminated, and the fire danger is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be 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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic perspective view of the sealing device of the present invention;
fig. 2 is a side view of the sealing device of the present invention;
fig. 3 is a top view of the sealing device of the present invention;
FIG. 4 is a schematic view of a gate bolt of the coal mill of the present invention;
fig. 5 is a schematic view of the ground track of the adjusting gate of the present invention;
figure 6 is the utility model discloses consolidate gate bracing piece sketch map.
In the figure:
the coal mill gate is 1, the telescopic joint mechanism is 2, the high-temperature furnace smoke pipeline is 3, the sealing filler groove is 4, the sealing groove is 5, the triangular rib is 6, the gate track is 7, the supporting rod is 8, the fixing device is 9 and the screw rod is 10.
Detailed Description
The technical solutions in the embodiments of the present invention will be described below clearly and completely, and it should be apparent that the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model discloses a sealing device of a fan coal mill, which comprises a coal mill gate 1, an expansion joint mechanism 2 and a high-temperature furnace smoke pipeline 3, wherein a sealing filler groove 4 is fixedly arranged on the inlet of the coal mill gate 1 along the horizontal direction, and sealing filler is filled in the sealing filler groove 4; and a sealing ring 5 is fixedly arranged below the telescopic joint mechanism 2 along the horizontal direction, and the sealing ring 5 falls into the sealing filler groove 4 along with the downward movement of the telescopic joint mechanism 2 so as to compress the sealing filler.
In order to further optimize the above technical solution, the gland packing groove 4 is composed of two concentric rings with different diameters.
In order to further optimize the technical scheme, the diameter of the sealing ring 5 is larger than that of the small ring of the sealing packing groove 4 and smaller than that of the large ring of the sealing packing groove 4.
In order to further optimize the technical scheme, the sealing filler is a graphite nickel-based packing.
In order to further optimize the technical scheme, the outer side of the sealing filler groove 4 is abutted against the upper edge of the entrance of the coal mill gate through a triangular rib 6.
In order to further optimize the technical scheme, the fastening bolt of the coal mill gate 1 is made of 20G.
In order to further optimize the technical scheme, the horizontal axial distance between the joint surface of the coal mill gate 1 and the coal mill casing is adjusted, so that the two are tightly combined without staggered openings.
Hereinafter, the sealing device of the fan coal mill of the present invention will be explained in detail by way of specific examples.
Referring to the attached drawings 1-3, in order to eliminate the loose fit condition of the expansion joint mechanism and the coal mill gate, the utility model discloses a sealing device of a fan coal mill, which comprises a coal mill gate 1, an expansion joint mechanism 2 and a high-temperature furnace flue pipe 3, wherein a sealing filler groove 4 is welded on the inlet of the coal mill gate 1 along the horizontal direction, the sealing filler groove 3 consists of two concentric rings with different diameters, the concentric rings are formed by welding flat steels with the diameter of 60mm multiplied by 5mm, the diameter of the small ring is 1840mm, and the diameter of the large ring is 1960 mm; further preferably, the outer side of the sealing filler groove 4 abuts against the upper edge of a gate inlet of the coal mill through a triangular rib 6, the side length of the triangular rib 6 is 60mm, the triangular rib 6 is made of flat steel with the diameter of 60mm multiplied by 5mm, the specific triangular rib 6 is uniformly welded by taking 8 points along the outer ring of a ring with the diameter of 1960mm, and the sealing filler groove 4 is reinforced to prevent deformation due to tightening force.
The sealing packing is filled in the sealing packing groove 4, and specifically, a graphite nickel-based packing with the diameter of 50mm multiplied by 50mm is used as the sealing packing.
The lower edge of the telescopic joint mechanism 2 is fixedly provided with a sealing ring 5 along the horizontal direction, the sealing ring 5 falls into a sealing filler groove 4 along with the downward movement of the telescopic joint mechanism 2 so as to compress sealing fillers, and the specific sealing ring 5 is a 1870mm circular ring formed by welding flat steel of 50mm multiplied by 5 mm.
In addition, on the basis of solving the problem that the matching between the telescopic joint mechanism and the coal mill gate is not tight, and in order to solve the problem of poor sealing caused by the deformation of the coal mill gate, the coal mill gate is subjected to closed regulation and transformation, and the method is specifically carried out in the following way:
and replacing part of the fastening bolt. Referring to fig. 4, the original bolt Q235A is insufficient in strength, cannot provide enough tightening force for the coal mill gate, part of the coal mill gate tightening buckle is deformed, cannot tighten the gate, the tightening force of the gate is improved by replacing the material 20G of the coal mill gate bolt, the length of the screw rod is lengthened, enough distance is provided for adjusting the angle of the gate, and the gate is adjusted to be uniformly stressed integrally.
And adjusting the ground track of the gate. Referring to the attached drawing 5, when the ground is cracked, sunk and cracked after the original ground is operated for a long time, the foundation of the coal mill gate rail 7 is reinforced again in the ground reinforcing and replacing process, so that the sinking displacement of the coal mill gate rail 7 is reduced or unchanged, and the horizontal axial distance between the coal mill gate and the coal mill shell joint surface is adjusted again, so that the coal mill gate and the coal mill shell joint surface are tightly combined without staggered joints.
And a gate supporting rod of the reinforced coal mill. Referring to the attached drawing 6, radial movement traces exist in the lateral displacement condition of a gate support 8 of an original coal mill in the long-period operation of the coal mill, the root part of a pin at the upper part of the gate support rod 8, which is close to the gate, is reinforced through a fixing device 9, the angle of the gate is adjusted through a support rod at the rear part of the gate, the gate is parallel to the coal mill and sealed in an annular mode, and the gate is guaranteed not to move in the radial direction through adjusting a threaded screw rod 10.
And adjusting a sealing line of a coal mill gate. When the coal mill runs, the radial sealing line deforms, the upper part of the sealing line deforms seriously, and the length of the sealing line at the upper part of the coal mill gate is readjusted to seal the gate.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the scheme disclosed in the embodiment, the method corresponds to the method disclosed in the embodiment, so the description is simple, and the relevant points can be referred to the description of the method part.
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 novel features disclosed herein.
Claims (7)
1. A fan coal mill sealing device comprises a coal mill gate, an expansion joint mechanism and a high-temperature furnace smoke pipeline, and is characterized in that a sealing filler groove is fixedly arranged on an inlet of the coal mill gate along the horizontal direction, and sealing fillers are filled in the sealing filler groove; and a sealing ring is fixedly arranged below the telescopic joint mechanism along the horizontal direction, and the sealing ring falls into the sealing filler groove along with the downward movement of the telescopic joint mechanism so as to compress the sealing filler.
2. The sealing device for a fan coal mill according to claim 1, wherein the sealing filler groove is composed of two concentric rings with different diameters.
3. The sealing device of the fan coal mill according to claim 2, wherein the diameter of the sealing ring is larger than the diameter of the small ring of the packing groove and smaller than the diameter of the large ring of the packing groove.
4. The sealing device of the fan coal mill according to claim 1, wherein the sealing filler is a graphite nickel-based packing.
5. The sealing device of the fan coal mill as claimed in claim 1, wherein the outside of the sealing filler groove abuts against the upper edge of the entrance of the coal mill gate through a triangular rib.
6. The sealing device for the fan coal mill as claimed in claim 1, wherein the fastening bolt of the coal mill gate is 20G.
7. The sealing device of a fan coal mill as claimed in claim 1, wherein the horizontal axial distance between the joint surface of the coal mill gate and the coal mill casing is adjusted so that the two are tightly combined without any gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122867295.0U CN217272706U (en) | 2021-11-22 | 2021-11-22 | Sealing device for fan coal mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122867295.0U CN217272706U (en) | 2021-11-22 | 2021-11-22 | Sealing device for fan coal mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217272706U true CN217272706U (en) | 2022-08-23 |
Family
ID=82882764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122867295.0U Active CN217272706U (en) | 2021-11-22 | 2021-11-22 | Sealing device for fan coal mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217272706U (en) |
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2021
- 2021-11-22 CN CN202122867295.0U patent/CN217272706U/en active Active
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