CN205435979U - Nozzle cascade with adjustable medium speed pulverizer - Google Patents
Nozzle cascade with adjustable medium speed pulverizer Download PDFInfo
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- CN205435979U CN205435979U CN201620174248.4U CN201620174248U CN205435979U CN 205435979 U CN205435979 U CN 205435979U CN 201620174248 U CN201620174248 U CN 201620174248U CN 205435979 U CN205435979 U CN 205435979U
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- screw mandrel
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Abstract
The medium speed pulverizer adjustable nozzle cascade for the regulation is to the mill wind speed of district's air feed of coal pulverizer, and including fixing moving the nozzle cascade, install the quiet nozzle cascade on well support body on the mill, the improvement of doing is: add the just round adjustable ring that links up by several sections constant diameter circular arc pieces between nozzle cascade and the quiet nozzle cascade, the radial position adjustment mechanism of ring circumference of installation adjustable ring on the casing moving. The utility model discloses an actively the effect is: the radial position adjustment mechanism of adjustable ring that the multistage constant diameter circular arc plain film set up links up and each section plain film can be under the circumstances of not shutting down, adjusts wind gap opening size in the coal pulverizer outside through the adjustment adjustable ring to swiftly conveniently adjusting the wind gap wind speed, having avoided in the past shut down to change the in -process of nozzle cascade, it is many to disassemble the part, and material consumption is big, man -hour is long or install inconvenient scheduling problem because of the heaviness. Save a large amount of repair time and manpower, material resources.
Description
Technical field
The invention belongs to mechanical field, be specifically related to large-scale coal yard raw coal pulverizing medium-speed pulverizer.
Background technology
The First air of medium-speed pulverizer enters, by nozzle ring, the district that mills from the bottom to top, and the effect of nozzle ring is an up wind speed, and make the distribution of air-flow more uniform, nozzle ring wind speed designs according to designing coal quality, this wind speed makes the coal dust ground can be delivered to separator with air-flow, is ultimately discharged into boiler or powder cabin, and the impurity that pebble coal, stone, iron block etc. can not crush is because of action of gravity, fall into scraper plate room by nozzle ring air port, be ultimately discharged into dreg discharging box.Current domestic and international most of coal fired power plants all exist and use coal and change problem frequently, burning coal is the biggest with designing coal quality deviation sometimes, and the jet blade angle of medium-speed pulverizer and the openings of sizes in air port were fixing nonadjustable in the past, it is difficult to take into account the coal that several difference is bigger.Coal pulverizer is when grinding the coal higher than design coal moisture content, in order to meet the drying capacity of coal pulverizer, need the air quantity that system offer is bigger, wind speed at coal pulverizer nozzle ring air port so will be caused higher, accelerate the abrasion of coal pulverizer inner structural members, be substantially reduced service life of equipment；When grinding the coal lower than design coal moisture content, the air quantity needing system to provide is less, at this moment the wind speed at nozzle ring air port is on the low side, coal pulverizer bed drain purge can be caused to increase, so the most fixing nonadjustable nozzle ring cannot adapt to the situation that coal varitation is bigger, the replacing of coal can only be adapted to by the method changing nozzle ring.The process changing nozzle ring is the most loaded down with trivial details, first has under conditions of power station generation load is the highest, and coal pulverizer just can be with maintenance down, and the replacing options of different types of medium-speed pulverizer nozzle ring is the most different.The medium-speed pulverizers such as MP, ZGM, HP need all to remove separator and internals changing nozzle ring when, its workload is equivalent to whole coal pulverizer and does installation again, MPS-HP-II type medium-speed pulverizer carries out nozzle ring dismounting by maintenance door position, although it is easier than the maintenance mode of the medium-speed pulverizers such as MP, ZGM, HP, but taking time and effort the most very much, more transducer set nozzle ring takes around 3 day time.
Adjustable nozzle ring by adjusting regulation ring outside coal pulverizer, can adjust air port openings of sizes under the conditions of coal pulverizer is non-stop-machine; thus adjust air port wind speed; adapting to various ature of coal, its whole adjustment polyvinyl chloride is convenient, can save substantial amounts of repair time and human and material resources.
Utility model content
The purpose of this utility model is to provide a kind of medium-speed pulverizer adjustable nozzle ring, the wind speed of district's air feed of milling to coal pulverizer for regulation, overcomes the aforementioned deficiency that air feed of existing coal pulverizer exists.
Adjustable nozzle ring of the present utility model includes the dynamic nozzle ring being fixed on mill, the quiet nozzle ring being arranged on middle support body, improvements introduced is: sets up the positive round regulation ring being connected by several sections of isometrical arc plates between dynamic nozzle ring and quiet nozzle ring, installs the arc plate radial position guiding mechanism of composition regulation ring in casing；The circumferential position that regulation ring therein is positioned at dynamic nozzle ring, quiet nozzle ring is located relatively, flexible gap is left between each section of circular arc plain film of composition regulation ring, every section of circular arc plain film of composition regulation ring is supported by several supports being fixed in casing, screw mandrel, activity that arc plate radial position guiding mechanism therein by the screw rodb base being fixed in casing, is assemblied on screw rodb base are assemblied in the rocking handle of one end outside screw mandrel casing and form, and the one end in screw mandrel casing is connected with arc plate.It it is more than basic technical scheme of the present utility model.
The adjacent circular arc sheet that the arc plate processed horizontal direction in radial position adjusts that is limited swings and occurs is relative to termination radial misalignments, further improvement of the utility model is: the arc plate radial position guiding mechanism of composition regulation ring is by the screw rodb base being fixed in casing, by unthreaded hole with move axially the screw mandrel that stop pin, block or axial retention bearing are assemblied in screw rodb base, the rocking handle of the movable assembling on screw mandrel casing external end head, the nut being assemblied on screw mandrel, fixing with nut is connected, is slidedly assemblied in screw rodb base upper push-rod and forms.Termination in push rod casing is connected with the circular arc plain film of corresponding composition adjustment ring, every section of corresponding circular arc plain film radial position guiding mechanism of circular arc plain film.
For preventing screw rodb base from leaking out with push rod clearance, set the seal of closure screw rodb base and push rod clearance at internal side of shell.
During for preventing inner seal body because of high temperature or using, breakage occurs, and then there is leakage powder problem with screw mandrel end in the screw rodb base protruding casing surface outside, at casing periphery wrapping wire pole socket fixed blade guard seat, on protective cover seat, assembling can the protective cover that hide screw rodb base and screw mandrel termination of demolition, installation.
Good effect of the present utility model is: what the multistage isometrical circular arc plain film set up was connected regulates ring and the radial position guiding mechanism of each section of plain film, can be in the case of non-stop-machine, by adjusting regulation ring outside coal pulverizer, adjust air port openings of sizes, thus efficient and convenient adjustment air port wind speed, overcome existing coal pulverizer when grinding the ature of coal bigger with design coal moisture content difference, can only be by the way of the nozzle ring that more moves, solve because air quantity changes, to solve the problems such as inner structural members abrasion quickening or bed drain purge increase, medium-speed pulverizer is made to adapt to coal wider. during avoiding conventional shutdown replacing nozzle ring, disassemble parts many, consumable quantity is big, man-hour length or because heaviness installs the problems such as inconvenient.Substantial amounts of repair time and human and material resources can be saved.
Accompanying drawing explanation
Fig. 1 is this utility model entirety sectional view.
Fig. 2 is the partial enlarged view that this utility model represents arc plate radial position guiding mechanism.
Detailed description of the invention
nullRefering to Fig. 1、Fig. 2，Adjustable nozzle ring of the present utility model includes the dynamic nozzle ring 7 being fixed on mill 10、It is arranged on the quiet nozzle ring 1 of casing 8 inner surface，The positive round regulation ring being connected by the isometrical arc plate 6 of decile eight sections is set up between dynamic nozzle ring 7 and quiet nozzle ring 1，Casing is installed the radial position guiding mechanism of arc plate 6，The regulation ring of arc plate 6 composition is positioned at dynamic nozzle ring 7、The circumferential position that quiet nozzle ring 1 is located relatively，Flexible gap is left between each section of circular arc plain film 6 of composition regulation ring，Every section of arc plate 6 is supported by several supports 11 being fixed in casing，The radial position guiding mechanism of arc plate 6 includes the screw rodb base 14 being fixed in casing、The screw mandrel 4 being assemblied in screw rodb base by unthreaded hole and axial retention bearing，The rocking handle 5 of the movable assembling on screw mandrel 4 casing external end head，Nut 12 is assembled on screw mandrel 4，Nut 12 be slidedly assemblied on screw rodb base 14 and the push rod parallel with screw mandrel 4 13 is fixing is connected，Termination in push rod 13 casing is connected with the arc plate 6 of corresponding composition adjustment ring，Every section of corresponding circular arc plain film radial position guiding mechanism of circular arc plain film.The seal 2 of closure push rod 13 and screw rodb base 14 gap is set inside casing 8.At the peripheral wrapping wire pole socket 14 fixed blade guard seat 3 of casing 8, on protective cover seat 3, assembling can the protective cover 11 that hide screw rodb base 14 and screw mandrel 4 termination of demolition, installation.
The work process of the present embodiment is: during use, first protective cover 11 is pulled down, regulation rocking handle 5 is installed to screw mandrel 4 end, shake regulation rocking handle 5 so that the arc plate 6 being connected on push rod 13 forms horizontal displacement with push rod, the air port radial opening size of the dynamic nozzle ring 7 of regulation, i.e. complete air rate adjustment, being taken off by regulation handle 5 after regulation, be again installed on protective cover seat 3 by protective cover 11, seal 2 and protective cover 11 play the effect of sealing.
Claims (4)
1. medium-speed pulverizer adjustable nozzle ring, including the dynamic nozzle ring being fixed on mill, the quiet nozzle ring that is arranged on middle support body, it is characterized in that: between dynamic nozzle ring and quiet nozzle ring, set up the positive round regulation ring being connected by several sections of isometrical arc plates, casing is installed the arc plate radial position guiding mechanism of composition regulation ring；The circumferential position that regulation ring therein is positioned at dynamic nozzle ring, quiet nozzle ring is located relatively, flexible gap is left between each section of circular arc plain film of composition regulation ring, every section of circular arc plain film of composition regulation ring is supported by several supports being fixed in casing, screw mandrel, activity that arc plate radial position guiding mechanism therein by the screw rodb base being fixed in casing, is assemblied on screw rodb base are assemblied in the rocking handle of one end outside screw mandrel casing and form, and the one end in screw mandrel casing is connected with arc plate.
Medium-speed pulverizer adjustable nozzle ring the most according to claim 1, it is characterized in that: the arc plate radial position guiding mechanism of described composition regulation ring is by the screw rodb base being fixed in casing, by unthreaded hole and move axially stop pin, the screw mandrel that block or axial retention bearing are assemblied in screw rodb base, the rocking handle of the movable assembling on screw mandrel casing external end head, the nut being assemblied on screw mandrel, fix with nut and be connected, it is slidedly assemblied in screw rodb base upper push-rod composition, termination in push rod casing is connected with the circular arc plain film of corresponding composition adjustment ring, every section of corresponding circular arc plain film radial position guiding mechanism of circular arc plain film.
Medium-speed pulverizer adjustable nozzle ring the most according to claim 1, is characterized in that: set the seal of closure screw rodb base and push rod clearance at internal side of shell.
Medium-speed pulverizer adjustable nozzle ring the most according to claim 1, is characterized in that: at casing periphery wrapping wire pole socket fixed blade guard seat, and on protective cover seat, assembling can the protective cover that hide screw rodb base and screw mandrel termination of demolition, installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620174248.4U CN205435979U (en) | 2016-03-08 | 2016-03-08 | Nozzle cascade with adjustable medium speed pulverizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620174248.4U CN205435979U (en) | 2016-03-08 | 2016-03-08 | Nozzle cascade with adjustable medium speed pulverizer |
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| Publication Number | Publication Date |
|---|---|
| CN205435979U true CN205435979U (en) | 2016-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620174248.4U Active CN205435979U (en) | 2016-03-08 | 2016-03-08 | Nozzle cascade with adjustable medium speed pulverizer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109667625A (en) * | 2019-02-01 | 2019-04-23 | 中国船舶重工集团公司第七0三研究所 | It is a kind of for can backing turbine windage loss test cantilever rotor |
| CN116328902A (en) * | 2023-01-03 | 2023-06-27 | 华能安源发电有限责任公司 | Coal mill and maintenance method for coal mill |
-
2016
- 2016-03-08 CN CN201620174248.4U patent/CN205435979U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109667625A (en) * | 2019-02-01 | 2019-04-23 | 中国船舶重工集团公司第七0三研究所 | It is a kind of for can backing turbine windage loss test cantilever rotor |
| CN116328902A (en) * | 2023-01-03 | 2023-06-27 | 华能安源发电有限责任公司 | Coal mill and maintenance method for coal mill |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 3388 century street, Changchun Economic Development Zone, Jilin Province, Jilin Patentee after: China Electric Construction Group Changchun power generation equipment Co., Ltd. Address before: Two district Huairenlu 130031 Jilin province Changchun No. 1 Patentee before: Changchun Power Generation Equipment Plant |
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| CP03 | Change of name, title or address |