CN103883786A - Full-automatic pulverized coal flow speed adjusting valve installed on powder conveying pipeline of powder manufacturing system - Google Patents
Full-automatic pulverized coal flow speed adjusting valve installed on powder conveying pipeline of powder manufacturing system Download PDFInfo
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- CN103883786A CN103883786A CN201410157486.XA CN201410157486A CN103883786A CN 103883786 A CN103883786 A CN 103883786A CN 201410157486 A CN201410157486 A CN 201410157486A CN 103883786 A CN103883786 A CN 103883786A
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- Prior art keywords
- pulverized coal
- semi
- valve
- lower semi
- flow rate
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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 full-automatic pulverized coal flow speed adjusting valve installed on a powder conveying pipeline of a powder manufacturing system. The full-automatic pulverized coal flow speed adjusting valve comprises a valve body and a valve element arranged in the valve body. The valve element comprises an upper semi-body, a lower semi-body, a drive device and a detection device, wherein the upper semi-body is of a sleeve shape with the upper end closed, the outer wall of the upper semi-body is fixed to the inner wall of the valve body through a plurality of supports arranged in the circumferential direction, the upper end of the lower semi-body is fixedly provided with an outer sleeve arranged on the outer wall of the upper semi-body in a sleeved mode, the drive device is used for driving the lower semi-body to vertically move, and the detection device is used for detecting the position of the lower semi-body. The lower semi-body of the valve element vertically slides in the valve body, the flow area between the bottom face of the lower semi-body and the inner wall of the valve body changes in a gradually-contracting mode from bottom to top until the portion with the minimum throttling area is reached, and finally the effect of adjusting the resistance of the pulverized coal conveying pipeline system is achieved by changing the air flow speed of pulverized coal.
Description
Technical field
The present invention relates to large coal-fired power plant coal powder boiler combustion control field, be specifically related to be arranged on the full automatic pulverized coal flow rate regulating valve 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 of every group of burner is 4～8.According to boiler design codes and standards, the be less than ± 10%(of pulverized coal mass flow distribution deviation between each group burner and the ratio of the mean value of all coal pipes).Determine that coal dust distributes the principal element of deviation to have 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, will distribute leveling by regulating coal dust flow velocity and concentration carry out coal dust.
But in the past, owing to cannot the coal dust flow velocity in coal dust Dual-Phrase Distribution of Gas olid being carried out to on-line measurement, therefore can only under cold conditions operating mode, replace coal dust to carry out coal dust with air and distribute leveling, to such an extent as to the pulverized coal flow speed deviation that enters into each coal pipe is very large, can not realize the mean allocation of coal dust, thereby affect the combustion efficiency of whole pulverized coal fired boiler.
Summary of the invention
Technical problem to be solved by this invention is to solve the larger problem of pulverized coal flow speed deviation in coal pulverizer coal pipe.
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 being arranged on pulverizing system pulverized coal feed pipe, comprises valve body and is arranged on the spool in described valve body, and described spool comprises:
Upper semi-body, is the sleeve-shaped of upper end closed, and the outer wall of described upper semi-body is fixed on by the support of the circumferential uniform setting in multiple edges on the inwall of described valve body, and the gap between multiple described supports 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 protruding 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 variation from bottom to top, until the position of orifice size minimum;
Drive unit, is arranged in described upper semi-body, for driving described lower semi-body to move up and down;
Detection device, is arranged in described upper semi-body, for detection of 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, vertically arranges, and lower end and described lower semi-body are fixed;
Second connecting rod, is horizontally disposed with, and the upper end of one end and described first connecting rod is hinged, and the other end is connected with the slide plate of described slide rheostat.
In such scheme, at least two described supports, be respectively equipped with the axial hole that connects 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;
The piston rod of described cylinder is fixed with described lower semi-body after passing successively described overhead gage and described lower pedal downwards.
In such scheme, between described outer sleeve and the outer wall of 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 that adopts in existing structure poor, easily enter the drawback of unstable regulatory region, this device is by lower semi-body axially the sliding up and down in valve body of spool, the gap length of change and valve interior wall, and then change breeze airflow flowing velocity by the flow area that changes pulverized coal channel, the final effect that realizes adjusting coal dust flow velocity.This device has good adjusting function and linear performance, and adjustment process is stable.
Brief description of the drawings
Fig. 1 is the structural representation while sliding to minimum point under lower semi-body in the present invention;
Fig. 2 is the structural representation while sliding to peak on lower semi-body in the present invention.
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 being arranged on pulverizing system pulverized coal feed pipe, comprise valve body 1 and be arranged on the spool 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, with bolt connection, for convenience detach, changes the each parts in spool.
Wherein, upper semi-body 3 is the sleeve-shaped of upper end closed, and the outer wall of upper semi-body 3 is fixed on the inwall of valve body 1 by the support 4 of the circumferential uniform setting in multiple edges, and the gap between multiple supports 4 forms coal dust flow channel.
Drive unit is arranged in upper semi-body 3, for driving lower semi-body 2 to move up and down.Drive unit is cylinder 5, and the cylinder body of cylinder 5 is fixed in upper semi-body, and the bottom surface of the piston rod of cylinder 5 and lower semi-body 2 is 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 detection of 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 vertically arranges, and lower end and lower semi-body 2 are fixing; Second connecting rod 7 is horizontally disposed with, and the upper end of one end and first connecting rod 6 is hinged, 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 fixing with lower semi-body 2; Upper sleeve pipe 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; The piston rod of cylinder 5 is fixed with lower semi-body after passing successively overhead gage and lower pedal downwards.
On at least two supports, be respectively equipped with the axial hole that connects valve body and upper semi-body inner chamber.The circuit relating in device all can connect layout by this axial hole, can realize in addition the circulation of valve core cavity and valve body outer air 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 being provided with between the outer wall of outer sleeve and upper semi-body 3, effectively ensures the inside and outside sealing effect of valve body spool.
By the relative sliding between upper and lower semi-body, the resistance of detection device slide rheostat also and then changes relatively, 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 dwindles from bottom to top gradually, until minimum flow area point, improve the mobile stability of coal dust, avoid adopting in existing structure flashboard type spool, regulate by producing eddy current mode, adjusting function is poor, easily enter the drawback of unstable regulatory region, this device slides 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 that changes pulverized coal channel, the final effect that realizes adjusting coal dust flow velocity.This device has good adjusting function and linear performance, and adjustment process is stable.
The present invention is by control unit control, control unit sends corresponding control signal according to current coal dust flow velocity measurement result, control cylinder is flexible, thereby 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 tapering type variation from bottom to top, until the position of orifice size minimum, by changing breeze airflow flow velocity, the final effect that realizes adjusting power transportation pipe system resistance.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn the structural change of making under enlightenment of the present invention, and every have identical or close technological scheme with the present invention, within all falling into protection scope of the present invention.
Claims (9)
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, is the sleeve-shaped of upper end closed, and the outer wall of described upper semi-body is fixed on by the support of the circumferential uniform setting in multiple edges on the inwall of described valve body, and the gap between multiple described supports 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 protruding 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 variation from bottom to top, until the position of orifice size minimum;
Drive unit, is arranged in described upper semi-body, for driving described lower semi-body to move up and down;
Detection device, is arranged in described upper semi-body, for detection of the position of described lower semi-body.
2. the full automatic pulverized coal flow rate regulating valve being arranged 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. the full automatic pulverized coal flow rate regulating valve being arranged on pulverizing system pulverized coal feed pipe as claimed in claim 1, 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. the full automatic pulverized coal flow rate regulating valve being arranged on pulverizing system pulverized coal feed pipe as claimed in claim 3, is characterized in that, described sensor is slide rheostat, and described linkage mechanism comprises:
First connecting rod, vertically arranges, and lower end and described lower semi-body are fixed;
Second connecting rod, is horizontally disposed with, and the upper end of one end and described first connecting rod is hinged, and the other end is connected with the slide plate of described slide rheostat.
5. the full automatic pulverized coal flow rate regulating valve being arranged on pulverizing system pulverized coal feed pipe as claimed in claim 1, is characterized in that, is respectively equipped with the axial hole that connects described valve body and described upper semi-body inner chamber at least two described supports.
6. the full automatic pulverized coal flow rate regulating valve being arranged on pulverizing system pulverized coal feed pipe as claimed in claim 1, is characterized in that, 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.
7. the full automatic pulverized coal flow rate regulating valve being arranged on pulverizing system pulverized coal feed pipe as claimed in claim 2, 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;
The piston rod of described cylinder is fixed with described lower semi-body after passing successively described overhead gage and described lower pedal downwards.
8. the full automatic pulverized coal flow rate regulating valve being arranged on pulverizing system pulverized coal feed pipe as claimed in claim 1, is characterized in that, between described outer sleeve and the outer wall of described upper semi-body, is provided with a seal ring.
9. the full automatic pulverized coal flow rate regulating valve being arranged on pulverizing system pulverized coal feed pipe as claimed in claim 1, 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 true CN103883786A (en) | 2014-06-25 |
| CN103883786B 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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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4067356A (en) * | 1974-10-19 | 1978-01-10 | Alfred Kreuz | Check valve for large conduits |
| 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 |
-
2014
- 2014-04-18 CN CN201410157486.XA patent/CN103883786B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4067356A (en) * | 1974-10-19 | 1978-01-10 | Alfred Kreuz | Check valve for large conduits |
| 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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| Publication number | Publication date |
|---|---|
| CN103883786B (en) | 2016-02-24 |
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