CN113418036B - CEMS high-efficient purge valve device based on pneumatic control - Google Patents
CEMS high-efficient purge valve device based on pneumatic control Download PDFInfo
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- CN113418036B CN113418036B CN202110397555.4A CN202110397555A CN113418036B CN 113418036 B CN113418036 B CN 113418036B CN 202110397555 A CN202110397555 A CN 202110397555A CN 113418036 B CN113418036 B CN 113418036B
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0473—Multiple-way safety valves
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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
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/04—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves
- F16K11/044—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves with movable valve members positioned between valve seats
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/12—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side weight-loaded
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
- G01N1/2258—Sampling from a flowing stream of gas in a stack or chimney
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- Mechanical Engineering (AREA)
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- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a CEMS (continuous emission monitoring system) efficient purge valve device based on pneumatic control, which comprises a valve body, a valve core, a valve rod and a spring, wherein the valve body is provided with a valve core; a stepped cylindrical blind hole is formed in the valve body and is divided into a first inner cavity and a second inner cavity; the first inner cavity is communicated with a measuring cavity of the sampling probe through a first through hole, and the second inner cavity is connected with the filter element or the purging area through a second through hole; the spring is arranged in the first inner cavity and the second inner cavity, the valve core is arranged in the second inner cavity, the valve core is a hollow cylinder with a sealed top and an open bottom, and the valve rod comprises a tubular structure and a flange structure; the tubular structure penetrates through the porous structure of the flange structure to be connected with the flange structure, the flange structure is plugged at the bottom of the valve body, and the outer diameter of the flange structure is larger than the inner diameter of the inner cavity II; the valve rod is positioned in the inner cavity II, when no external force acts, the through hole I is communicated with the through hole II under the action of the gravity of the valve core and the spring, the valve core moves upwards under the action of upward force until the valve core blocks the lower end opening of the inner cavity I, and the valve rod is communicated with the through hole II.
Description
Technical Field
The invention relates to a CEMS high-efficiency purge valve device based on pneumatic control.
Background
When the existing CEMS sampling probe samples for a long time, particulate matters such as smoke dust in smoke easily block a sampling probe rod, a filter element and the like, and high-frequency high-pressure purging is necessary for the existing probe. In the existing probes for in-situ measurement and extraction measurement, a back-blowing valve is an electromagnetic valve used at normal temperature, a certain distance exists between the electromagnetic valve and a blowing area, and the blowing impact force is weakened when the electromagnetic valve is opened and reaches the blowing area. The in-situ measurement has great guiding significance for denitration optimization and accurate ammonia spraying, and as the electromagnetic valve cannot be installed on the probe in the high-temperature environment of the flue, the purge gas can enter the measurement cavity during purging to cause pressure relief, and simultaneously, the pollution and the thermal deformation of the measurement cavity are caused to influence the measurement reliability and accuracy, so that the in-situ measurement cannot be widely applied. Besides, the prior art has the following problems: 1) the pressure of the purge gas is relieved because the purge gas enters the measuring cavity, the rear end pipeline and the like before reaching the purge area, and the back flushing efficiency is low; 2) because the electronic and rubber parts cannot be used in the high-temperature environment of the flue, a usable high-temperature switch valve is unavailable; 3) the in-situ measurement has great guiding significance for denitration optimization and accurate ammonia spraying, and as the electromagnetic valve cannot be installed on the probe in the high-temperature environment of the flue, the purge gas can enter the measurement cavity during purging to cause pressure relief, and simultaneously, the pollution and the thermal deformation of the measurement cavity are caused to influence the measurement reliability and accuracy, so that the in-situ measurement cannot be widely applied.
The present invention has been made to solve these problems.
Disclosure of Invention
The invention aims to provide a CEMS high-efficiency purge valve device based on pneumatic control.
The purpose of the invention can be realized by the following technical scheme:
a CEMS high-efficiency purge valve device based on pneumatic control comprises a valve body, a valve core, a valve rod and a spring; a stepped cylindrical blind hole is formed in the valve body and is divided into a first inner cavity and a second inner cavity; the inner diameter of the inner cavity II is larger than that of the inner cavity I, the inner cavity I is communicated with a measuring cavity of the sampling probe through the through hole I, and the inner cavity II is connected with the filter element or the purging area through the through hole II; the spring is arranged in the first inner cavity and the second inner cavity, the valve core is arranged in the second inner cavity, the outer diameter of the valve core is smaller than the inner diameter of the second inner cavity and larger than the outer diameter of the first inner cavity, the valve core is a hollow cylinder with a sealed top and an open bottom, and the valve rod comprises a tubular structure and a flange structure; the tubular structure penetrates through the hole-shaped structure of the flange structure to be connected with the flange structure, the flange structure is plugged at the bottom of the valve body, the valve rod is positioned in the inner cavity II and extends into the valve core for a certain distance, when no external force is applied, the valve core is communicated with the through hole I and the through hole II under the action of self gravity and the spring, the valve core moves upwards under the action of upward force until the valve core plugs the lower end opening of the inner cavity I, and the valve rod is communicated with the through hole II.
Preferably, the two sides of the valve body are respectively provided with a measuring cavity connecting end and a filter element connecting end, the measuring cavity connecting end is communicated with the first through hole, the measuring cavity connecting end is connected with the measuring cavity, the filter element connecting end is communicated with the second through hole, and the filter element connecting end is connected with the filter element or the purging area.
Further, the tubular structure of the valve rod is communicated with the purge gas.
Further, the length of the spring is greater than that of the first inner cavity.
The beneficial technical effects are as follows:
1. the valve core of the invention ingeniously utilizes high-pressure blowing gas as power, the blowing gas and the valve core synchronously act, the blowing gas is prevented from entering a measuring cavity and a rear end pipeline to cause pressure relief during blowing, cooling condensed water of a heat tracing pipeline, pollution and thermal deformation of the measuring cavity and the like are caused, the measuring reliability and accuracy are influenced, the low-temperature blowing gas enters the heat tracing pipe or the measuring cavity to generate condensed water to cause pollution or blockage, and the thermal deformation of an in-situ measuring probe is also caused to influence the measuring reliability and accuracy.
2. The purging valve device can stably act for a long time in a high-temperature environment of the flue, and the blank of a valve in the high-temperature environment is solved; the purge valve has simple and reliable structure and extremely low failure rate.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a block diagram of a purge valve.
FIG. 2 is another schematic view of the purge valve configuration.
Fig. 3 is a schematic view of the valve cartridge structure.
Fig. 4 is a schematic view of a valve stem configuration.
FIG. 5 is a schematic view of purge valve operation.
FIG. 6 is a schematic view of the purge valve installed in place with the measurement probe.
In the figure: 1-valve body, 11-blind hole, 111-inner cavity I, 112-inner cavity II, 113-through hole I, 114-through hole II, 2-valve core, 3-valve rod, 31-flange structure, 32-tubular structure, 4-spring, 5-sampling probe, 6-measuring cavity and 7-filter element.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, the CEMS efficient purging valve based on pneumatic control comprises a valve body 1, a valve core 2, a valve rod 3 and a spring 4, wherein a stepped cylindrical blind hole 11 is formed in the valve body 1, the blind hole 11 is divided into a first inner cavity 111 and a second inner cavity 112, the inner diameter of the second inner cavity 112 is larger than that of the first inner cavity 111, the first inner cavity 111 is communicated with a measuring cavity 6 of a sampling probe 5 through a first through hole 113, and the second inner cavity 112 is connected with a filter element 7 or a purging area through a second through hole 114; the spring 4 is arranged in the first inner cavity 111 and the second inner cavity 112, the length of the spring 4 is greater than that of the first inner cavity 111, the valve core 2 is arranged in the second inner cavity 112, the outer diameter of the valve core 2 is smaller than the inner diameter of the second inner cavity 112 and greater than that of the first inner cavity 111, the valve core 2 is a hollow cylinder with a sealed top and an open bottom, and the valve rod 3 comprises a tubular structure 32 and a flange structure 31; the tubular structure 32 penetrates through the hole-shaped structure of the flange structure 31 to be connected with the flange structure 31, the flange structure 31 is blocked at the bottom of the valve body 1, the valve rod 3 is positioned in the second inner cavity 112 and extends into the valve core 2 for a certain distance, when no external force acts, the valve core 2 moves downwards under the action of the self gravity of the valve core 2 and the spring 4, the first through hole 113 is communicated with the second through hole 114, the valve core 2 moves upwards under the action of the upward force until the valve core 2 blocks the lower end opening of the first inner cavity 111, and the valve rod 3 is communicated with the second through hole 114. The tubular structure 32 of the valve stem 3 is accessible for purging gas.
When in use, the purge valve is arranged on the CEMS sampling probe 5 and can be positioned in a high-temperature area in the flue; when the probe 5 is in the sampling working time, no purging gas exists in the valve rod 3, the valve core 2 moves downwards under the action of the self gravity and the elastic force of the spring 4, the measuring cavity 6 is communicated with the purging area when the valve is opened, and the sample gas flows to the measuring cavity 6 through the purging valve to finish the sampling and measuring work; when the sampling is finished and the purging is started, the low-pressure purge gas reaching the position of the valve core 2 firstly is blocked for short suppressing pressure, when the accumulated pressure is greater than the elastic force of the spring 4 and the gravity of the valve core 2, the valve core 2 moves upwards under the impact force of compressed air, the high-pressure compressed air instantly flows to the filter core 7 or a purging area to achieve a high-pressure cleaning effect, the communication channel between the measurement cavity 6 and the purging area is closed, the purge gas can be prevented from entering the measurement cavity 6 to be decompressed to influence the purging effect, and the purge gas can also be prevented from entering a heat tracing pipe at the rear end of the sampling probe or producing condensate water in the measurement cavity to cause pollution or blockage and cause thermal deformation of the in-situ measurement probe to influence the measurement reliability and accuracy.
A measuring cavity connecting end 12 and a filter element connecting end 13 are respectively arranged on two sides of the valve body 1, the measuring cavity connecting end 11 is communicated with the first through hole 113, the measuring cavity connecting end 11 is connected with the measuring cavity 6, the filter element connecting end 13 is communicated with the second through hole 114, and the filter element connecting end 13 is connected with the filter element 7 or the purging area; the tubular structure 32 of the valve stem 3 communicates with the purge gas.
When the scavenging gas through the valve rod 3 is closed or opened, the valve core 2 is opened or closed to measure the chamber and sweep the district intercommunication passageway in valve body 1 reciprocating motion under the effect of scavenging gas impact force and spring elasticity, can prevent that the scavenging gas from getting into to measure the chamber pressure release and influencing the effect of sweeping and measuring the chamber pollution and warping, this scavenging valve simple structure is reliable, and the ingenious scavenging gas linkage of utilizing is opened or is closed, sweeps efficiently, can use for a long time under flue high temperature environment.
The valve core action ingeniously utilizes high-pressure purge gas as power, the purge gas and the valve core act synchronously, and the purge gas is prevented from entering the measuring cavity and a rear end pipeline to cause pressure relief during purging, so that a heat tracing pipeline cools condensed water, the measuring cavity is polluted and thermally deformed, and the measuring reliability and accuracy are influenced.
The invention has high purging efficiency, can greatly reduce the maintenance period of the probe filter element, simultaneously solves the problem that the in-situ measuring probe cannot be widely applied due to purging influence, and has great use significance for denitration optimization and accurate ammonia injection; the invention adopts a modular design concept, is convenient to install and can be installed and used on probes with various structures.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.
Claims (4)
1. A CEMS efficient purge valve device based on pneumatic control is characterized by comprising a valve body (1), a valve core (2), a valve rod (3) and a spring (4); a stepped cylindrical blind hole (11) is formed in the valve body (1), and the blind hole (11) is divided into a first inner cavity (111) and a second inner cavity (112); the inner diameter of the inner cavity II (112) is larger than that of the inner cavity I (111), the inner cavity I (111) is communicated with a measuring cavity (6) of the sampling probe (5) through a through hole I (113), and the inner cavity II (112) is connected with the filter element (7) or the purging area through a through hole II (114); the spring (4) is arranged in the first inner cavity (111) and the second inner cavity (112), the valve core (2) is arranged in the second inner cavity (112), the outer diameter of the valve core (2) is smaller than the inner diameter of the second inner cavity (112) and larger than the outer diameter of the first inner cavity (111), the valve core (2) is a hollow cylinder with a sealed top and an open bottom, and the valve rod (3) comprises a tubular structure (32) and a flange structure (31); the tubular structure (32) penetrates through the hole-shaped structure of the flange structure (31) to be connected with the flange structure (31), the flange structure (31) is blocked at the bottom of the valve body (1), the valve rod (3) is positioned in the second inner cavity (112) and extends into the valve core (2) for a certain distance, when no external force is applied, the valve core (2) moves downwards under the action of the self gravity and the spring (4), the first through hole (113) is communicated with the second through hole (114), the valve core (2) moves upwards under the action of upward force until the valve core (2) blocks the lower end opening of the first inner cavity (111), and the valve rod (3) is communicated with the second through hole (114).
2. A CEMS high-efficiency purging valve device based on pneumatic control as claimed in claim 1 wherein, the valve body (1) is provided with a measuring cavity connecting end (12) and a filter element connecting end (13) on two sides respectively, the measuring cavity connecting end (12) is communicated with the first through hole (113), the measuring cavity connecting end (12) is connected with the measuring cavity (6), the filter element connecting end (13) is communicated with the second through hole (114), and the filter element connecting end (13) is connected with the filter element (7) or the purging area.
3. A CEMS high-efficiency purge valve apparatus based on pneumatic control as claimed in claim 2 wherein the tubular structure (32) of the valve stem (3) communicates purge gas.
4. A CEMS high efficiency purge valve apparatus based on pneumatic control as claimed in claim 1, wherein the spring (4) length is greater than the length of lumen one (111).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110397555.4A CN113418036B (en) | 2021-04-14 | 2021-04-14 | CEMS high-efficient purge valve device based on pneumatic control |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110397555.4A CN113418036B (en) | 2021-04-14 | 2021-04-14 | CEMS high-efficient purge valve device based on pneumatic control |
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| Publication Number | Publication Date |
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| CN113418036A CN113418036A (en) | 2021-09-21 |
| CN113418036B true CN113418036B (en) | 2022-06-10 |
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| CN202110397555.4A Active CN113418036B (en) | 2021-04-14 | 2021-04-14 | CEMS high-efficient purge valve device based on pneumatic control |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115921426A (en) * | 2022-11-10 | 2023-04-07 | 上海氢美健康科技有限公司 | A pulsed gas flow generator and its generation method used in the manufacturing process of magnesium hydrogen |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7377931B2 (en) * | 2004-08-11 | 2008-05-27 | Medtronic Vascular, Inc | Balloon catheter with self-actuating purging valve |
| CN201155611Y (en) * | 2008-02-03 | 2008-11-26 | 王文昌 | Valve type pulse soot cleaning valve |
| US8459297B2 (en) * | 2009-07-02 | 2013-06-11 | Tescom Corporation | Balanced valve cartridge |
| CN205350373U (en) * | 2016-01-12 | 2016-06-29 | 合肥通用机械研究院 | Modified pulse blowback valve |
| CN208221609U (en) * | 2018-05-15 | 2018-12-11 | 浙江亚光科技股份有限公司 | Novel blowing valve |
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