CN203297680U - Gas blocking valve with self-sweeping function - Google Patents
Gas blocking valve with self-sweeping function Download PDFInfo
- Publication number
- CN203297680U CN203297680U CN2013202786823U CN201320278682U CN203297680U CN 203297680 U CN203297680 U CN 203297680U CN 2013202786823 U CN2013202786823 U CN 2013202786823U CN 201320278682 U CN201320278682 U CN 201320278682U CN 203297680 U CN203297680 U CN 203297680U
- Authority
- CN
- China
- Prior art keywords
- valve
- gas occluding
- gas
- differential pressure
- valve pocket
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Measuring Volume Flow (AREA)
Abstract
The utility model relates to devices which are used for eliminating additional errors of differential pressure signal pipelines, in particular to a gas blocking valve with the self-sweeping function. The gas blocking valve with the self-sweeping function comprises a valve body, wherein a valve chamber is arranged in the valve body, tested media in a differential pressure transducer measuring tube flow into a pressure guiding tube through the valve chamber, a gas blocking valve chamber which is communicated with the valve chamber is formed in an inlet of the valve chamber, a gas blocker is arranged on an inlet of the gas blocking valve chamber, a valve rod is installed in the gas blocking valve chamber, the gas blocker is fixed at the bottom of the valve rod, the top of the valve rod penetrates out of the valve body, and a valve rod section on the top of the gas blocking valve chamber and the valve body are in seal connection through a seal ring. The gas blocking valve with the self-sweeping function has the advantages of improving the measuring accuracy of a flow meter, being simple in pipeline structure, and reducing use cost.
Description
Technical field
The utility model relates to the device of eliminating differential pressure signal pipeline complementary error, a kind of raising flowmeter measuring accuracy specifically, and pipeline structure is simple and reduce the gas occluding of the cleaning certainly valve of user cost.
Background technique
Differential pressure flowmeter is that a class is with a long history, at industrial consumption up to 50% flowmeter.Can differential pressure transmitter receive real differential pressure value, is decided by a series of factor, and wherein correct manufacturing, installation, the use of pressure pipe and pressure guiding pipeline is the key that guarantees to obtain true differential pressure value.The differential pressure signal pipeline is the weak link of differential pressure flowmeter, according to statistics in differential pressure flowmeter the fault of pilot pipeline at most (as obstruction, leakage, burn into freeze, spurious signal etc.), account for 70% of fault.Therefore international and domestic relevant criterion all has strict careful regulation to laying of differential pressure signal pipeline.
Be installed as example with the horizontal pipe differential pressure flowmeter, when measured medium is liquid and steam, should stop gas to enter PRESSURE PIPE; When measured medium is gas, should stop the gas medium transposition in differential pressure transducer sounding pipe and pilot pipeline, stop water vapour constantly to bring PRESSURE PIPE into.Referring to accompanying drawing 1, the differential pressure signal pipeline of prior art generally comprises differential pressure transmitter (6), be arranged on three valve groups (5) on differential pressure transmitter (6), be arranged on the PRESSURE PIPE (3) on three valve groups (5), PRESSURE PIPE (3) is communicated with differential pressure transducer sounding pipe (1) inner chamber by the entrance pressure mouth (2) that is arranged on differential pressure transducer sounding pipe (1) sidewall, and is arranged on the keying valve (4) on PRESSURE PIPE (3); Enter PRESSURE PIPE (3) or prevent that water vapour from constantly bringing the purpose of PRESSURE PIPE (3) (eliminating the complementary error of differential pressure signal pipeline) into for reaching above-mentioned prevention gas during use, according to different situations, gas-collecting device or depressor are set respectively in differential pressure signal pilot pipeline, and the related valve of gas-collecting device and depressor and pipe fitting, and also there are strict requirements to the gradient of laying of pilot pipeline.In the flowmeter running, the gas that positive/negative-pressure side gas-collecting device and depressor are collected and amount of liquid are not wait, and cause thus liquid-column height poor, i.e. corresponding error.Simultaneously, when exhaust or discharge opeing operation not in time or insufficient, when measuring media was liquid or steam, the liquid in the differential pressure signal pipeline may enter pilot pipeline or differential pressure transmitter by product gas, causes the differential pressure signal distortion; When measuring media was gas, the water vapor in gas may be condensed into liquid and enter differential pressure transmitter, causes complementary error.Therefore after the differential pressure signal pipeline correctly has been installed, still may bring the differential pressure signal pipeline to measure complementary error.
Be installed as example with gas-collecting device, generally positive/negative-pressure side gas-collecting device liquid-column height is poor is 150mmH
2False differential pressure signal between 0～1500Pa, just may appear in the O post in positive/negative-pressure side differential pressure signal pipeline in running, this spurious signal and current differential pressure value ratio are the relative value of the measurement complementary error that the differential pressure signal pipeline brings.When current differential pressure value was large, its relative error was little; Current differential pressure value hour, its relative error are just large.In the actual production running, its relative error does not wait to hundreds of from a few percent, tens.
The directional error that above-mentioned elimination differential pressure signal pipeline complementary error is used is larger, makes the flowmeter measuring accuracy low; The installation of gas-collecting device or depressor causes pipeline structure complicated, and engineering cost, mounting cost and maintenance expenses are high, also just make user cost high.
In sum, the device of prior art can't effectively be eliminated the complementary error of differential pressure signal pipeline, causes the flowmeter measuring accuracy low, and pipeline structure is complicated and user cost is high.
Summary of the invention
The purpose of this utility model is to provide a kind of raising flowmeter measuring accuracy, the simple gas occluding of the cleaning certainly valve with reducing costs of pipeline structure.
For realizing that the technological scheme that the utility model above-mentioned purpose adopts is: a kind of from cleaning the gas occluding valve, wherein: this certainly cleans the gas occluding valve and comprises valve body, be provided with in valve body for measured medium in the differential pressure transducer sounding pipe and flow into valve pocket in PRESSURE PIPE, in the inlet of valve pocket, be provided with the gas occluding valve pocket that is communicated with valve pocket;
The inlet of described gas occluding valve pocket is provided with the gas occluding device, in the gas occluding valve pocket, valve rod is installed, the gas occluding device is fixed on stem bottom, and the valve rod top passes valve body, is tightly connected by seal ring between the valve rod section at gas occluding valve pocket top place and valve body;
During use, the import of gas occluding valve pocket is communicated with differential pressure transducer sounding pipe inner chamber, the outlet of valve pocket is communicated with PRESSURE PIPE, eliminate signal in differential pressure flowmeter pilot pipeline by the gas occluding device and transmit distortion, guarantee that differential pressure signal accurately passes to differential pressure transmitter.
Due to said structure, described in the utility model cleaning the gas occluding valve has effectively simplified whole pipeline structure certainly, has reduced user cost; Eliminate signal transmission distortion in differential pressure flowmeter pilot pipeline by certainly cleaning the gas occluding valve simultaneously, guaranteed the accurate transmission of differential pressure signal, with this, improved the measuring accuracy of flowmeter.
Description of drawings
The utility model can further illustrate by the indefiniteness embodiment that accompanying drawing provides.
Accompanying drawing 1 is the structural representation of prior art differential pressure signal pipeline.
Accompanying drawing 2 is structural representation of the present utility model.
Accompanying drawing 3 is for certainly cleaning the structural representation of gas occluding valve in accompanying drawing 2.
Accompanying drawing 4 is the another embodiment's of differential pressure signal pipeline of the present utility model structural representation.
Accompanying drawing 5 is for certainly cleaning the structural representation of gas occluding valve in accompanying drawing 4.
Accompanying drawing 6 is the structural representation of the utility model gas occluding device.
Accompanying drawing 7 is arranged on structural representation on the gas occluding device for the utility model scraper.
In figure: 1, differential pressure transducer sounding pipe; 2, entrance pressure mouth; 3, PRESSURE PIPE; 4, open and close valve; 5, three valve groups; 6, differential pressure transmitter; 7, gas occluding valve pocket; 8, valve body; 9, gas occluding device; 10, scraper; 11, valve rod; 12, handle; 14, valve pocket.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples:
Referring to accompanying drawing 2 to 7, a kind of from cleaning the gas occluding valve, wherein: this certainly cleans the gas occluding valve and comprises valve body 8, be provided with in valve body 8 for measured medium in differential pressure transducer sounding pipe 1 and flow into valve pocket 14 in PRESSURE PIPE 3, in the inlet of valve pocket 14, be provided with the gas occluding valve pocket 7 that is communicated with valve pocket 14;
The inlet of described gas occluding valve pocket 7 is provided with gas occluding device 9, valve rod 11 is installed in gas occluding valve pocket 7, gas occluding device 9 is fixed on valve rod 11 bottoms, valve rod 11 tops pass valve body 8, are tightly connected by seal ring between 11 sections of the valve rods at gas occluding valve pocket 7 tops places and valve body 8;
During use, the import of gas occluding valve pocket 7 is communicated with differential pressure transducer sounding pipe 1 inner chamber, the outlet of valve pocket 14 is communicated with PRESSURE PIPE 3, eliminate signal in differential pressure flowmeter pilot pipeline by gas occluding device 9 and transmit distortion, guarantee that differential pressure signal accurately passes to differential pressure transmitter 6.In this embodiment, particularly: when measuring liquid and steam medium, be full of liquid in pilot pipeline 3, the measuring media product gas in sounding pipe 1, gas density is less than fluid density, therefore gas can rise, liquid can sink, and when pressure pipeline sectional area was enough large, the liquid in the gas in sounding pipe 1 and pilot pipeline 3 can replace, thereby make the gas in sounding pipe 1 enter pilot pipeline 3 and differential pressure transmitter 6, bring complementary error.Wall attachment effect due to fluid, there is frictional force between the body surface that fluid and it are flow through, caliber is less, the frictional force of tube wall (resistance) is larger, when adopting when cleaning the gas occluding valve, can be very little for the gap of fluid circulation between gas occluding device 9 and gas occluding valve pocket 7, resistance is large, stoped the gas rising, tube wall can stop liquid to descend to the viscous force of liquid.Therefore, can stop the gas in sounding pipe 1 to enter pilot pipeline 3 by certainly cleaning the gas occluding valve.When the measurement gas medium, difference because of temperature, there is the difference of density in gas in gas in sounding pipe 1 and pilot pipeline 3, same reason, low-density gas can rise, and highdensity gas can descend, when pressure pipeline sectional area is enough large, gas in sounding pipe 1 can enter pilot pipeline 3 and differential pressure transmitter 6, and the water vapour in measuring media can condense in pilot pipeline and differential pressure transmitter, cause measurement error.Can stop gas in sounding pipe 1 and the gas in PRESSURE PIPE 3 to replace by certainly cleaning the gas occluding valve.Therefore eliminate signal transmission distortion in differential pressure flowmeter pilot pipeline from cleaning the gas occluding valve, guaranteed the accurate transmission of differential pressure signal, with this, improved the measuring accuracy of flowmeter.And certainly clean the gas occluding valve and replaced the element such as gas-collecting device, depressor, condenser, isolator in prior art differential pressure flowmeter pilot pipeline, simplified whole pipeline structure, reduced user cost.
For avoiding the foul in medium to adhere to obstruction gas occluding device valve pocket, in above-described embodiment, preferably: the outer of described gas occluding device 9 is provided with scraper 10.Can clear up differential pressure transducer sounding pipe 1(by the scraper 10 on gas occluding device 9 is pressure pipe) in attachment.
For adapting to different measured mediums, in above-described embodiment, preferably: described gas occluding device 9 is 0.5～3mm with the gap of gas occluding valve pocket 7 chamber walls.Its gap length is determined by dielectric viscosity and temperature
For guaranteeing cleaning effect, in above-described embodiment, preferably: the height of described scraper 10 is 0.5～3mm.
For ease of operation, in above-described embodiment, preferably: the top of described valve rod 11 is fixed with handle 12, drives gas occluding device 9 by rotatable handle 12 and rotates in gas occluding valve pocket 7 and move up and down on gas occluding valve pocket 7 axis.During rotatable handle 12, gas occluding device 9 can be stretched into differential pressure transducer sounding pipe 1 inside, rely on hydrodynamic to wash away the attachment on gas occluding device surface.
For the needs according to different measured mediums, in above-described embodiment, preferably: be provided with on described valve body 8 to control on keying valve 4 that valve pocket 14 and measured medium whether circulate or described PRESSURE PIPE 3 and be provided with the keying valve 4 whether control PRESSURE PIPE 3 and measured medium circulate.
Obviously, all embodiments of foregoing description are a part of embodiments of the present utility model, rather than whole embodiments.Based on embodiment of the present utility model, those of ordinary skills are not making all other embodiments that obtain under the creative work prerequisite, all belong to the category of the utility model protection.
In sum, the utility model has improved the measuring accuracy of flowmeter, and pipeline structure is simple and reduced user cost.
Claims (6)
1. one kind is cleaned the gas occluding valve certainly, it is characterized in that: this certainly cleans the gas occluding valve and comprises valve body (8), be provided with in valve body (8) for measured medium in differential pressure transducer sounding pipe (1) and flow into valve pocket (14) in PRESSURE PIPE (3), in the inlet of valve pocket (14), be provided with the gas occluding valve pocket (7) that is communicated with valve pocket (14);
The inlet of described gas occluding valve pocket (7) is provided with gas occluding device (9), valve rod (11) is installed in gas occluding valve pocket (7), gas occluding device (9) is fixed on valve rod (11) bottom, valve rod (11) top passes valve body (8), is tightly connected by seal ring between valve rod (11) section at gas occluding valve pocket (7) top place and valve body (8);
During use, the import of gas occluding valve pocket (7) is communicated with differential pressure transducer sounding pipe (1) inner chamber, the outlet of valve pocket (14) is communicated with PRESSURE PIPE (3), eliminate signal in differential pressure flowmeter pilot pipeline by gas occluding device (9) and transmit distortion, guarantee that differential pressure signal accurately passes to differential pressure transmitter (6).
2. according to claim 1 from cleaning the gas occluding valve, it is characterized in that: the outer of described gas occluding device (9) is provided with scraper (10).
3. according to claim 1 and 2 from cleaning the gas occluding valve, it is characterized in that: described gas occluding device (9) is 0.5～3mm with the gap of gas occluding valve pocket (7) chamber wall.
4. according to claim 2 from cleaning the gas occluding valve, it is characterized in that: the height of described scraper (10) is 0.5～3mm.
5. according to claim 2 from cleaning the gas occluding valve, it is characterized in that: the top of described valve rod (11) is fixed with handle (12), drives gas occluding device (9) by rotatable handle (12) and rotates in gas occluding valve pocket (7) and move up and down on gas occluding valve pocket (7) axis.
6. according to claim 1 from cleaning the gas occluding valve, it is characterized in that: be provided with on described valve body (8) to control on keying valve (4) that in valve pocket (14), measured medium whether circulate or described PRESSURE PIPE (3) and be provided with and control the keying valve (4) whether the middle measured medium of PRESSURE PIPE (3) circulates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202786823U CN203297680U (en) | 2013-05-21 | 2013-05-21 | Gas blocking valve with self-sweeping function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202786823U CN203297680U (en) | 2013-05-21 | 2013-05-21 | Gas blocking valve with self-sweeping function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203297680U true CN203297680U (en) | 2013-11-20 |
Family
ID=49573687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202786823U Expired - Fee Related CN203297680U (en) | 2013-05-21 | 2013-05-21 | Gas blocking valve with self-sweeping function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203297680U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245383A (en) * | 2013-05-21 | 2013-08-14 | 项家从 | Method and device for eliminating signal transmission errors of pressure guide pipe of differential pressure flowmeter |
-
2013
- 2013-05-21 CN CN2013202786823U patent/CN203297680U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245383A (en) * | 2013-05-21 | 2013-08-14 | 项家从 | Method and device for eliminating signal transmission errors of pressure guide pipe of differential pressure flowmeter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103245383A (en) | Method and device for eliminating signal transmission errors of pressure guide pipe of differential pressure flowmeter | |
| CN202631182U (en) | Device for flushing flange type differential-pressure pressure transmitter | |
| CN203297680U (en) | Gas blocking valve with self-sweeping function | |
| CN203376230U (en) | Measuring device for pH (Potential of Hydrogen) value and density value of slurry | |
| CN201697644U (en) | Integrated differential pressure flowmeter | |
| CN203704987U (en) | Differential pressure type flow measuring system | |
| CN105181037A (en) | Online accurate measuring device and online accurate measuring method for fluid flow | |
| CN202661131U (en) | Improved liquid level measurement device for phosphoric acid condensation evaporation chamber | |
| CN204788515U (en) | Curved elbow meter of S | |
| CN204286549U (en) | A kind of liquid level emasuring device | |
| CN105424106A (en) | V-cone flowmeter vertical installation structure | |
| CN207779502U (en) | With the device for rinsing double flange diaphragm differential pressure transmitters measurement viscous medium liquid levels | |
| CN209639790U (en) | A kind of V cone flow meter being easily changed | |
| CN209605887U (en) | A kind of multi-parameter integral uniform velocity tube flowmeter | |
| CN204188215U (en) | A kind of level gauging cylinder continuously with online self-cleaning function | |
| CN204085644U (en) | A kind of flow calibrating device | |
| CN203732105U (en) | Isolated pressure acquiring device for steam flow measurement | |
| CN208921380U (en) | DBB valve leak detecting device | |
| CN206772361U (en) | A kind of differential pressure type gas flowmeter | |
| CN203241086U (en) | Sanitary vortex street flowmeter | |
| CN205861277U (en) | A kind of instrument pressure spacing container | |
| CN202255478U (en) | Automatic oil-measuring device | |
| CN203811233U (en) | Device for detecting liquid level of slurry of mineral floatation cell | |
| CN209148481U (en) | Dense-medium separation system media liquid measuring device | |
| CN103591987A (en) | Plastic tube rotor flow meter and measuring and installing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131120 Termination date: 20190521 |