CN103883786B - Be arranged on the full automatic pulverized coal flow rate regulating valve on pulverizing system pulverized coal feed pipe - Google Patents
Be arranged on the full automatic pulverized coal flow rate regulating valve on pulverizing system pulverized coal feed pipe Download PDFInfo
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- CN103883786B CN103883786B CN201410157486.XA CN201410157486A CN103883786B CN 103883786 B CN103883786 B CN 103883786B CN 201410157486 A CN201410157486 A CN 201410157486A CN 103883786 B CN103883786 B CN 103883786B
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- Prior art keywords
- pulverized coal
- semi
- lower semi
- flow rate
- feed pipe
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/12—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with streamlined valve member around which the fluid flows when the valve is opened
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
- F16K1/38—Valve members of conical shape
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a kind of full automatic pulverized coal flow rate regulating valve be arranged on pulverizing system pulverized coal feed pipe, comprise valve body and be arranged on the spool in described valve body, described spool comprises upper and lower semi-body and drive unit and detection device, wherein, upper semi-body is the sleeve-shaped of upper end closed, and the outer wall of described upper semi-body is fixed on the inwall of described valve body by the support of multiple circumferentially uniform setting; The upper end of lower semi-body is fixed with outer sleeve, and described outer sleeve is sleeved on the outer wall of described upper semi-body; Drive unit moves up and down for driving described lower semi-body; Detection device is for detecting the position of described lower semi-body.The present invention is slided up and down in valve body by the lower semi-body of spool, circulation area between the bottom surface of lower semi-body and the inwall of valve body is from bottom to top in tapering type change, until the position that orifice size is minimum, by changing breeze airflow flow velocity, the final effect realizing adjustment power transportation pipe system resistance.
Description
Technical field
The present invention relates to large coal-fired power plant coal powder boiler combustion control field, be specifically related to the full automatic pulverized coal flow rate regulating valve be arranged on pulverizing system pulverized coal feed pipe.
Background technique
The coal pulverizer of large coal-fired power plant pulverized coal fired boiler generally adopts unit pulverized-coal system to provide coal dust for burner, and the quantity often organizing burner is 4 ~ 8.According to boiler design codes and standards, the pulverized coal mass flow between each group burner distributes deviation and is less than ± the ratio of 10%(and the mean value of all coal pipes).Determine that the principal element of coal powder distribation deviation has flow resistance deviation between coal pipe, coal powder density deviation, fineness of pulverized coal and a coal-air ratio.After fineness of pulverized coal and a coal-air ratio reach predetermined range, coal powder distribation leveling will be carried out by regulating coal dust flow velocity and concentration.
But in the past, due to on-line measurement cannot be carried out to the coal dust flow velocity in coal dust Dual-Phrase Distribution of Gas olid, therefore can only coal dust be replaced to carry out coal powder distribation leveling with air under cold conditions operating mode, to such an extent as to the pulverized coal flow speed deviation entering into each coal pipe is very large, namely can not realize the mean allocation of coal dust, thus affect the combustion efficiency of whole pulverized coal fired boiler.
Summary of the invention
Technical problem to be solved by this invention solves the problem that in coal pulverizer coal pipe, pulverized coal flow speed deviation is larger.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is to provide a kind of full automatic pulverized coal flow rate regulating valve be arranged on pulverizing system pulverized coal feed pipe, and comprise valve body and be arranged on the spool in described valve body, described spool comprises:
Upper semi-body, the sleeve-shaped in upper end closed, the outer wall of described upper semi-body is fixed on the inwall of described valve body by the support of multiple circumferentially uniform setting, and the gap between multiple described support forms coal dust flow channel;
Lower semi-body, its upper end is fixed with outer sleeve, and described outer sleeve is sleeved on the outer wall of described upper semi-body, and its end face is lower convex arc surface or conical surface-shaped; Circulation area between the bottom surface of described lower semi-body and the inwall of described valve body is tapering type change from bottom to top, until the position that orifice size is minimum;
Drive unit, is arranged in described upper semi-body, moves up and down for driving described lower semi-body;
Detection device, is arranged in described upper semi-body, for detecting the position of described lower semi-body.
In such scheme, described drive unit is cylinder, and the cylinder body of described cylinder is fixed in described upper semi-body, and the piston rod of described cylinder and the bottom surface of described lower semi-body are fixed.
In such scheme, described detection device comprises:
Sensor, is arranged in described upper semi-body;
Linkage mechanism, one end is connected with described lower semi-body, and the other end is connected with described sensor.
In such scheme, described sensor is slide rheostat, and described linkage mechanism comprises:
First connecting rod, is vertically arranged, and lower end and described lower semi-body are fixed;
Second connecting rod, is horizontally disposed with, the upper end thereof of one end and described first connecting rod, and the other end is connected with the slide plate of described slide rheostat.
In such scheme, at least two described supports are respectively equipped with the axial hole of through described valve body and described upper semi-body inner chamber.
In such scheme, described lower semi-body surface adopts wear-resisting spraying treatmen; The end face of described upper semi-body is provided with wear-resistant block, and the end face of described wear-resistant block is arc surface or the conical surface-shaped of epirelief.
In such scheme, also comprise inner sealing device, described inner sealing device comprises:
Casing running, its lower end is provided with lower pedal, and described lower pedal and described lower semi-body are fixed;
Upper sleeve pipe, its upper end outer wall is provided with overhead gage, and the end face of described overhead gage and described upper semi-body is fixed, and described upper sleeve plug is in described casing running;
Fix with described lower semi-body after the piston rod of described cylinder passes described overhead gage and described lower pedal downwards successively.
In such scheme, between the outer wall of described outer sleeve and described upper semi-body, be provided with a seal ring.
In such scheme, described drive unit is fluid pressure drive device or motor drive unit.
The present invention, adopt with cone type valve core structure, avoid the flashboard type spool adjusting function adopted in existing structure poor, easily enter the drawback of unstable regulatory region, this device is by the axially lower slider of lower semi-body in valve body of spool, change the gap length with valve interior wall, and then change breeze airflow flowing velocity by the flow area changing pulverized coal channel, finally realize the effect regulating coal dust flow velocity.This device has good adjusting function and linear performance, and adjustment process is stablized.
Accompanying drawing explanation
Fig. 1 is structural representation when sliding to minimum point in the present invention under lower semi-body;
Fig. 2 is structural representation when lower semi-body sliding in the present invention peak.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
As depicted in figs. 1 and 2, the invention provides a kind of full automatic pulverized coal flow rate regulating valve be arranged on pulverizing system pulverized coal feed pipe, the spool comprising valve body 1 and be arranged in valve body 1.Spool comprises upper and lower semi-body 3,2, drive unit, detection device and inner sealing device.Valve body 1 upper and lower end is provided with adpting flange, and valve body 1 is made up of upper and lower two-part, connects with bolt, for convenience detach, changes each parts in spool.
Wherein, the sleeve-shaped of upper semi-body 3 in upper end closed, the outer wall of upper semi-body 3 is fixed on the inwall of valve body 1 by the support 4 of multiple circumferentially uniform setting, and the gap between multiple support 4 forms coal dust flow channel.
Its upper end of lower semi-body 2 is fixed with outer sleeve, and outer sleeve is sleeved on the outer wall of upper semi-body 3, and the end face of lower semi-body 2 is lower convex arc surface or conical surface-shaped, and its arc surface or conical surface-shaped design are convenient to regulate the circulation area between lower semi-body and valve body.
Drive unit is arranged in upper semi-body 3, moves up and down for driving lower semi-body 2.Drive unit is cylinder 5, and the cylinder body of cylinder 5 is fixed in upper semi-body, and the piston rod of cylinder 5 and the bottom surface of lower semi-body 2 are fixed.Drive unit also can adopt fluid pressure drive device or motor drive unit, and in the present embodiment, drive unit adopts cylinder.
Detection device is arranged in upper semi-body 3, for detecting the position of lower semi-body 2.Detection device comprises sensor and linkage mechanism, and wherein, sensor setting is in upper semi-body 3; One end of linkage mechanism is connected with lower semi-body 2, and the other end is connected with sensor.Sensor is slide rheostat, and linkage mechanism comprises first, second connecting rod 6,7, and wherein, first connecting rod 6 is vertically arranged, and lower end and lower semi-body 2 are fixed; Second connecting rod 7 is horizontally disposed with, the upper end thereof of one end and first connecting rod 6, and the other end is connected with the slide plate of slide rheostat.
Inner sealing device comprises upper and lower sleeve pipe, and wherein, casing running lower end is provided with lower pedal 8, and lower pedal 8 is fixed with lower semi-body 2; Upper sleeve upper end outer wall is provided with overhead gage 9, and overhead gage 9 is fixed with the end face of upper semi-body 3, and upper sleeve plug is in casing running; Fix with lower semi-body after the piston rod of cylinder 5 passes overhead gage and lower pedal downwards successively.
At least two supports are respectively equipped with the axial hole of through valve body and upper semi-body inner chamber.The circuit related in device all can carry out connection by this axial hole and arrange, the circulation of valve core cavity and valve body outer air can be realized additionally by this axial hole, make inner and outer air pressure identical, avoid the resistance of air that cause different from spool internal pressure in valve body.
The end face of upper semi-body 3 is provided with wear-resistant block, and the end face of wear-resistant block is arc surface or the conical surface-shaped of epirelief.Seal ring together with outer sleeve is provided with between the outer wall of upper semi-body 3, effectively ensures sealing effect inside and outside valve body spool.
By the relative sliding between upper and lower semi-body, the resistance also and then change relatively of detection device slide rheostat, thus generation current change information, thus make drive unit cylinder according to detection signal drives Telescopic-cylinder.
The present invention, adopt cone type valve core structure, make in the process of slidable adjustment, valve body flow area reduces from bottom to top gradually, until minimum flow area point, improve the stability of coal dust flowing, avoid in existing structure and adopt flashboard type spool, regulate by producing vortex-like fashion, adjusting function is poor, easily enter the drawback of unstable regulatory region, this device is slided up and down in valve body by the lower semi-body of spool, regulate the gap length with valve interior wall, and then change breeze airflow flow resistance by the flow area changing pulverized coal channel, the final effect realizing adjustment coal dust flow velocity.This device has good adjusting function and linear performance, and adjustment process is stablized.
The present invention is controlled by control unit, control unit sends corresponding control signal according to current coal dust flow velocity measurement result, control cylinder stretches, thus drive lower semi-body to slide up and down on upper semi-body, circulation area between the bottom surface of lower semi-body and the inwall of valve body is from bottom to top in tapering type change, until the position that orifice size is minimum, by changing breeze airflow flow velocity, the final effect realizing adjustment power transportation pipe system resistance.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn the structural change made under enlightenment of the present invention, and every have identical or close technological scheme with the present invention, all falls within protection scope of the present invention.
Claims (8)
1. be arranged on the full automatic pulverized coal flow rate regulating valve on pulverizing system pulverized coal feed pipe, comprise valve body and be arranged on the spool in described valve body, it is characterized in that, described spool comprises:
Upper semi-body, the sleeve-shaped in upper end closed, the outer wall of described upper semi-body is fixed on the inwall of described valve body by the support of multiple circumferentially uniform setting, and the gap between multiple described support forms coal dust flow channel;
Lower semi-body, its upper end is fixed with outer sleeve, and described outer sleeve is sleeved on the outer wall of described upper semi-body, and the end face of described lower semi-body is lower convex arc surface or conical surface-shaped; Circulation area between the bottom surface of described lower semi-body and the inwall of described valve body is tapering type change from bottom to top, until the position that orifice size is minimum; Described lower semi-body surface adopts wear-resisting spraying treatmen; The end face of described upper semi-body is provided with wear-resistant block, and the end face of described wear-resistant block is arc surface or the conical surface-shaped of epirelief;
Drive unit, is arranged in described upper semi-body, moves up and down for driving described lower semi-body;
Detection device, is arranged in described upper semi-body, for detecting the position of described lower semi-body.
2. be arranged on the full automatic pulverized coal flow rate regulating valve on pulverizing system pulverized coal feed pipe as claimed in claim 1, it is characterized in that, described drive unit is cylinder, and the cylinder body of described cylinder is fixed in described upper semi-body, and the piston rod of described cylinder and the bottom surface of described lower semi-body are fixed.
3. be arranged on the full automatic pulverized coal flow rate regulating valve on pulverizing system pulverized coal feed pipe as claimed in claim 1, it is characterized in that, described detection device comprises:
Sensor, is arranged in described upper semi-body;
Linkage mechanism, one end is connected with described lower semi-body, and the other end is connected with described sensor.
4. be arranged on the full automatic pulverized coal flow rate regulating valve on pulverizing system pulverized coal feed pipe as claimed in claim 3, it is characterized in that, described sensor is slide rheostat, and described linkage mechanism comprises:
First connecting rod, is vertically arranged, and lower end and described lower semi-body are fixed;
Second connecting rod, is horizontally disposed with, the upper end thereof of one end and described first connecting rod, and the other end is connected with the slide plate of described slide rheostat.
5. be arranged on the full automatic pulverized coal flow rate regulating valve on pulverizing system pulverized coal feed pipe as claimed in claim 1, it is characterized in that, at least two described supports are respectively equipped with the axial hole of through described valve body and described upper semi-body inner chamber.
6. be arranged on the full automatic pulverized coal flow rate regulating valve on pulverizing system pulverized coal feed pipe as claimed in claim 2, it is characterized in that, also comprise inner sealing device, described inner sealing device comprises:
Casing running, its lower end is provided with lower pedal, and described lower pedal and described lower semi-body are fixed;
Upper sleeve pipe, its upper end outer wall is provided with overhead gage, and the end face of described overhead gage and described upper semi-body is fixed, and described upper sleeve plug is in described casing running;
Fix with described lower semi-body after the piston rod of described cylinder passes described overhead gage and described lower pedal downwards successively.
7. be arranged on the full automatic pulverized coal flow rate regulating valve on pulverizing system pulverized coal feed pipe as claimed in claim 1, it is characterized in that, between the outer wall of described outer sleeve and described upper semi-body, be provided with a seal ring.
8. be arranged on the full automatic pulverized coal flow rate regulating valve on pulverizing system pulverized coal feed pipe as claimed in claim 1, it is characterized in that, described drive unit is fluid pressure drive device or motor drive unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410157486.XA CN103883786B (en) | 2014-04-18 | 2014-04-18 | Be arranged on the full automatic pulverized coal flow rate regulating valve on pulverizing system pulverized coal feed pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410157486.XA CN103883786B (en) | 2014-04-18 | 2014-04-18 | Be arranged on the full automatic pulverized coal flow rate regulating valve on pulverizing system pulverized coal feed pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103883786A CN103883786A (en) | 2014-06-25 |
| CN103883786B true CN103883786B (en) | 2016-02-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410157486.XA Active CN103883786B (en) | 2014-04-18 | 2014-04-18 | Be arranged on the full automatic pulverized coal flow rate regulating valve on pulverizing system pulverized coal feed pipe |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2449857C3 (en) * | 1974-10-19 | 1979-04-05 | Rheinische Armaturen- Und Maschinenfabrik Albert Sempell, 4050 Moenchengladbach | Check valve for pipelines |
| CN201568581U (en) * | 2009-12-19 | 2010-09-01 | 安徽铜都阀门股份有限公司 | Flow regulating valve |
| CN201944282U (en) * | 2011-03-12 | 2011-08-24 | 安徽铜都阀门股份有限公司 | Straight-through rapid cut-off valve |
| CN203836347U (en) * | 2014-04-18 | 2014-09-17 | 青岛立宇科技开发有限公司 | Full-automatic pulverized coal flow velocity regulating valve installed on powder conveying pipeline of coal pulverizing system |
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2014
- 2014-04-18 CN CN201410157486.XA patent/CN103883786B/en active Active
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| Publication number | Publication date |
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| CN103883786A (en) | 2014-06-25 |
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