CN102221437B - Pipeline air pressure on-line detector and detection method - Google Patents
Pipeline air pressure on-line detector and detection method Download PDFInfo
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- CN102221437B CN102221437B CN2010101484920A CN201010148492A CN102221437B CN 102221437 B CN102221437 B CN 102221437B CN 2010101484920 A CN2010101484920 A CN 2010101484920A CN 201010148492 A CN201010148492 A CN 201010148492A CN 102221437 B CN102221437 B CN 102221437B
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Abstract
The invention discloses a pipeline air pressure on-line detector, comprising detection parts, a hand valve and an air inlet pipe. The detection parts comprise a piston housing, a piston and a piston rod, wherein one end of the housing is provided with a chamber cover, one end of the piston rod passes through the chamber cover, the piston rod is provided with a scale and both sides of the piston are respectively provided with a detection spring. The invention also discloses another pipeline air pressure on-line detection method. Under the conditions that the air inlet pipe communicates with the pipeline to be detected and the hand valve is opened, the piston moves under the effect of pipeline air pressure and the piston rod is driven to stretch. The air pressure state value of the pipeline can be detected through the reading of the scale. Therefore, the measuring apparatus has advantages such as high measurement accuracy, on-line detection option, positive and negative air pressure detection option, simple and convenient operation, high efficiency and the like.
Description
Technical field
The present invention relates to pipeline air pressure detection technique, more particularly, relate to a kind of pipeline gas and be pressed in line detector and detection method.
Background technology
In the testing of instrument system, the atmospheric pressure state of secondary instrument sampling pipe has direct influence to the accuracy of measuring.Because pipeline is the effective way that controlling object is passed to detection system through medium; Therefore it needs tight; Do not receive the influence of extraneous factor; Only in this way could guarantee the accuracy of transmittance process, thus, the correctness of pipeline gas pressure condition is one of important need that guarantees the control system reliability.In the actual job process;, pipeline loosening because of the pipe joint that the site environment vibration causes can't be avoided because of problems such as hot and cold dewfall cause freezing because of accumulation obstruction, pipeline that trachoma, pipe interior oxide appear in quality because of long-term open-air aging rhegma, the pipeline arranged fully; All might take place at any time, and on same pipeline, often insert multiple measurement instrument again, therefore intricate; In case the generation problem will be difficult to investigation, cause incuring loss through delay the time of fixing a breakdown.
At present, in the secondary instrument sampling pipe status detection work of instrument system, the staff adopts following method to detect:
(1) for the atmospheric pressure state of malleation pipeline, carries out, according to whether having bubble to produce the online judgement of carrying out through using liquid soap to smear in the pipeline outside;
(2) for the atmospheric pressure state of negative pressure line, then will give the certain malleation of pipeline then with system off-line earlier, after malleation was set up, the judgment principle according to above forward voltage diode line state detected again;
(3) for the pipe detection of important instrument, can't accomplish to carry out in real time, necessary off-line can image data.
But; Existing detection mode gets involved in the length consuming time of dealing with problems from work; Often because of the problem of piping erection position supplementary means such as need scaffold erecting, and if liquid soap own do not smear evenly, the trouble spot is easy to be left in the basket; Therefore very high to staff's operation requirement, there is any omission just can't find the reason of real fault during work; And to give certain positive pressure for negative-pressure pipeline, so auxiliary source of the gas must be installed, make workload increase; The most important thing is that original detection mode can involve a plurality of equipment because of same pipeline; In case off-line operation; Influence surface is very wide, so the pipeline of visual plant carries out the maintenance work demand of regular status monitoring, under existing detection method, does not more have feasibility; Up at present, still can't effectively address the above problem.
Summary of the invention
To the above-mentioned shortcoming that exists in the prior art, the purpose of this invention is to provide a kind of pipeline gas and be pressed in line detector and detection method, in order to realize the online detection of the positive and negative air pressure of pipeline.
For realizing above-mentioned purpose, the present invention adopts following technical scheme:
On the one hand, this pipeline gas is pressed in the line detector, comprising:
Detection part comprises piston shell, piston and piston rod, and housing one end is provided with the chamber lid, and piston is located in the housing, and piston rod one end links to each other with piston, and the other end passes the chamber lid, and piston rod is provided with scale, and the piston both sides are respectively equipped with detection springs;
The hand valve is located at the other end of piston shell, and communicates with enclosure interior;
Draft tube, an end is communicated with hand valve one end, and the other end is provided with in order to connect the pipe adapter of tested pipeline.
Described hand valve comprises valve body, hand push type spool and pipe connecting bolt, and valve body one side has the gas outlet that is communicated with piston shell, and the bottom is provided with the valve body flap of band back-moving spring; The hand push type spool is located in the valve body, and the hand push type spool is the big right cylinder in middle little two, and the lower end is provided with seam and offsets with back-moving spring one end, and valve body is stretched out in the upper end; The other end of back-moving spring and valve body flap offset; The pipe connecting bolt is connected in the valve body other end, has the air intake opening that is communicated with draft tube on the pipe connecting bolt.
Also be with two sealing rings on the described piston, described piston rod one end passes piston, and fixes through hold-down nut.
Described chamber lid is threaded with housing, and the chamber covers and has two gas equalizing ports that are used for the install adjustment spanner.
The described draft tube other end is provided with hose adapter, is connected through the air intake opening of hose adapter with the pipe connecting bolt.
On the other hand, it is following to adopt detector to carry out the concrete steps of online test method of pipeline air pressure:
A. through regulating the chamber lid, the scale of piston rod is returned to zero;
B. through pipe adapter draft tube is connected with tested pipeline;
C. press and open the hand valve, tested pipeline is communicated with enclosure interior, piston receives gas pressure and drives piston rod to move;
D. decontrol and close the hand valve, tested pipeline and enclosure interior are separated, piston continues to receive gas pressure and position after keeping moving;
E. scale is carried out the atmospheric pressure state of reading in order to the judgement tested pipeline, and tested pipeline is arranged barrier according to result of determination;
F. repeating step C to E is up to specification until rod reading;
G. unload lower inlet duct and by assistant's valve, carry out the housing venting, and make piston reset.
In step C:
When if tested pipeline air pressure is barotropic state, described piston rod stretches out outside the lid of chamber;
When if tested pipeline air pressure is negative pressure state, described piston rod is retraction in the lid of chamber.
In step e:
If when tested pipeline air pressure was barotropic state, the reading of described scale was a positive number;
If when tested pipeline air pressure was negative pressure state, the reading of described scale was a negative.
In technique scheme; Pipeline gas of the present invention is pressed in the line detector and comprises detection part, hand valve and draft tube; Detection part comprises piston shell, piston and piston rod, and housing one end is provided with the chamber lid, and piston rod one end passes the chamber lid; Piston rod is provided with scale, and the piston both sides are respectively equipped with detection springs.Be communicated with tested pipeline through draft tube; And through opening the hand valve; Can make piston moved by the pipeline gas pressure, and it is flexible to drive piston rod, can detects the atmospheric pressure state value of pipeline through reading scale; Therefore have the accuracy of measurement high, can onlinely detect, positive and negative air-pressure all can detect and simple, convenient, the efficient advantages of higher.
Description of drawings
Fig. 1 is the structure cut-open view that pipeline gas of the present invention is pressed in the line detector;
Fig. 2 is the cut-open view of hand valve open mode of the present invention;
Fig. 3 is the cut-open view of hand valve closed condition of the present invention;
Fig. 4 is the view that the present invention detects negative-pressure pipeline;
Fig. 5 is the view that the present invention detects the malleation pipeline;
Fig. 6 is the process flow diagram that pipeline gas of the present invention is pressed in line detecting method.
Embodiment
Further specify technical scheme of the present invention below in conjunction with accompanying drawing and embodiment.
See also shown in Figure 1ly, pipeline gas of the present invention is pressed in line detector 10 and comprises detection part 11, hand valve 12 and draft tube 13.Wherein, detection part 11 comprises piston shell 111, piston 112 and piston rod 113, and housing 111 1 ends are provided with chamber lid 114; Piston 112 is located in the housing 111, and is with two sealings 115 at piston 112, two chambers about housing 111 inside are separated into; Piston rod 113 1 ends pass piston 112, and fix through hold-down nut 116, and the other end passes chamber lid 114; Piston rod 113 is provided with scale 117, and piston 112 left and right sides are respectively equipped with detection springs 118; Hand valve 12 is located at the other end of piston shell 111, and communicates with housing 111 inside; Draft tube 13, one ends are communicated with hand valve 12 1 ends, and the other end is provided with in order to connect the pipe adapter 131 of tested pipeline.Hand valve 12 comprises valve body 121, hand push type spool 122 and pipe connecting bolt 123, and valve body 121 1 sides have the gas outlet 126 that is connected with piston 112 housings 111, and the bottom is provided with the valve body flap 125 of band back-moving spring 124; Hand push type spool 122 is located in the valve body 121, and hand push type spool 122 is the big right cylinders in middle little two, and the lower end is provided with seam 129 and offsets with back-moving spring 124 1 ends, and valve body 121 is stretched out in the upper end; The other end of back-moving spring 124 and valve body flap 125 offset; Pipe connecting bolt 123 is connected in valve body 121 other ends, has the air inlet 127 that is communicated with draft tube 13 on the pipe connecting bolt 123.Please combine Fig. 2, shown in Figure 3, when pressing down hand push type spool 122, hand valve 12 is in open mode, and gas outlet 126 is connected with air intake opening 127, thereby housing 111 inside are connected with tested pipeline; When decontroling hand push type spool 122, receive back-moving spring 124 effects to make hand push type spool 122 reset, hand valve 12 is in closed condition at this moment.Can adopt between above-mentioned chamber lid 114 and the housing 111 and be threaded; And on chamber lid 114, have two gas equalizing ports 119 that are used for the install adjustment spanner; Its effect is: one, cover 114 installation site through spanner scalable chamber, in order to proofread and correct the zero-bit of scale 117; Two, finish after hand valve 12 cuts out when inspection, when piston 112 resetted, left chamber can be inhaled venting accordingly through gas equalizing port 119, thereby realized air pressure balance.In addition, be provided with hose adapter 132, be connected through hose adapter 132 convenient air intake openings 127 with pipe connecting bolt 123 at draft tube 13 other ends.
See also shown in Figure 6ly, the online test method that the above-mentioned testing fixture of employing of the present invention carries out pipeline air pressure is following:
At first, cover 114 installation sites, return to zero, make piston 112 both sides spring action dynamic balances, and make piston 112 be in equilibrium state in order to scale 117 to piston rod 113 through regulating its chamber; Through pipe adapter 131 draft tube 13 is reserved joint with the sample valve of tested pipeline then and be connected, thereby insert the tested pipeline system; Press hand push type spool 122 again, hand valve 12 is opened,, and make piston 112 receive gas pressure and drive piston rod 113 and move tested pipeline and housing 111 internal communication; Please combine shown in Figure 4; If tested pipeline air pressure is when being negative pressure state, the pistons 112 in the housing 111 are moved right by suction function and compress the detection springs 118 on right side, thus drive piston rod 113 move right until stop stable after; Decontrol hand push type spool 122; Hand valve 12 cuts out, thereby detection part 11 is broken off with tested pipeline immediately, carry out reading to scale 117 this moment again; Its value is the state value (piston rod 113 of this moment is retraction in chamber lid 114, and the reading of scale 117 is a negative) of tested negative-pressure pipeline.Please combine shown in Figure 5; If tested pipeline air pressure is when being barotropic state, then the pistons 112 in the housing 111 are moved to the left by positive pressure and compress the detection springs 118 in left side, and are opposite with negative pressure; Piston rod 113 was outside chamber lid 114 and stretched out this moment, and the reading of scale 117 is a positive number.Need to prove at this, can online reading when carrying out scale 117 readings, close sample valve and carry out the off-line reading.According to the detected value that reads the state of tested pipeline system is judged, be not inconsistent, then carry out the fault handling of piping system immediately, after fault handling, open hand valve 12 once more and carry out duplicate measurements like detected value and setting, up to specification until reading.At this moment, take off draft tube 13, this moment, scale is not return-to-zero also because right chamber pressure also continues keeping.Exit by 12 pairs of right chambers of assistant's valve then, thereby make chamber internal gas pressure and atmospheric equilibrium, finally make scale 117 return to zero-bit, decontrol hand valve 12 at last, accomplish detecting operation.
In sum, adopt detector 10 of the present invention and detection method, can have following several big advantage:
One, utilizes the dynamic balance principle of work of piston 112 dual springs control, can just can not accomplish surveying work malleation or negative pressure state pipeline by any ancillary method;
The status values that two, can directly show tested pipeline provides data to carry out precision and judges to have scientific rationality more;
Three, can realize the difference online detection under (positive and negative) state of calming the anger, need not to install auxiliary source of the gas;
Four, the design of hand valve 12 can realize the quick response in the testing process, and the safety between control and the tested pipeline (system) is logical closes;
Five, easy and simple to handle, portability good, not only reduced the non-productive work time, also increase work efficiency.
Those of ordinary skill in the art will be appreciated that; Above embodiment is used for explaining the present invention; And be not to be used as qualification of the present invention; As long as in connotation scope of the present invention, all will drop in claims scope of the present invention variation, the modification of the above embodiment.
Claims (7)
1. a pipeline gas is pressed in the line detector, it is characterized in that,
Comprise:
Detection part comprises piston shell, piston and piston rod, and housing one end is provided with the chamber lid, and piston is located in the housing, and piston rod one end links to each other with piston, and the other end passes the chamber lid, and piston rod is provided with scale, and the piston both sides are respectively equipped with detection springs;
The hand valve is located at the other end of piston shell, and communicates with enclosure interior, and described hand valve comprises valve body, hand push type spool and pipe connecting bolt, and valve body one side has the gas outlet that is communicated with piston shell, and the bottom is provided with the valve body flap of being with back-moving spring; The hand push type spool is located in the valve body, and the hand push type spool is the big right cylinder in middle little two, and the lower end is provided with seam and offsets with back-moving spring one end, and valve body is stretched out in the upper end; The other end of back-moving spring and valve body flap offset; The pipe connecting bolt is connected in the valve body other end, has the air intake opening that is communicated with draft tube on the pipe connecting bolt;
Draft tube, an end is communicated with hand valve one end, and the other end is provided with in order to connect the pipe adapter of tested pipeline.
2. pipeline gas as claimed in claim 1 is pressed in the line detector, it is characterized in that,
Also be with two sealing rings on the described piston, described piston rod one end passes piston, and fixes through hold-down nut.
3. pipeline gas as claimed in claim 1 is pressed in the line detector, it is characterized in that:
Described chamber lid is threaded with housing, and the chamber covers and has two gas equalizing ports that are used for the install adjustment spanner.
4. pipeline gas as claimed in claim 1 is pressed in the line detector, it is characterized in that:
The described draft tube other end is provided with hose adapter, is connected through the air intake opening of hose adapter with the pipe connecting bolt.
5. an online test method that adopts detector as claimed in claim 1 to carry out pipeline air pressure is characterized in that,
The concrete steps of this method are following:
A. through regulating the chamber lid, the scale of piston rod is returned to zero;
B. through pipe adapter draft tube is connected with tested pipeline;
C. press and open the hand valve, tested pipeline is communicated with enclosure interior, piston receives gas pressure and drives piston rod to move;
D. decontrol and close the hand valve, tested pipeline and enclosure interior are separated, piston continues to receive gas pressure and position after keeping moving;
E. scale is carried out the atmospheric pressure state of reading in order to the judgement tested pipeline, and tested pipeline is arranged barrier according to result of determination;
F. repeating step C to E is up to specification until rod reading;
G. unload lower inlet duct and by assistant's valve, carry out the housing venting, and make piston reset.
6. online test method as claimed in claim 5 is characterized in that,
In step C:
When if tested pipeline air pressure is barotropic state, described piston rod stretches out outside the lid of chamber;
When if tested pipeline air pressure is negative pressure state, described piston rod is retraction in the lid of chamber.
7. online test method as claimed in claim 5 is characterized in that,
In step e:
If when tested pipeline air pressure was barotropic state, the reading of described scale was a positive number;
If when tested pipeline air pressure was negative pressure state, the reading of described scale was a negative.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101484920A CN102221437B (en) | 2010-04-15 | 2010-04-15 | Pipeline air pressure on-line detector and detection method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101484920A CN102221437B (en) | 2010-04-15 | 2010-04-15 | Pipeline air pressure on-line detector and detection method |
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| CN102221437A CN102221437A (en) | 2011-10-19 |
| CN102221437B true CN102221437B (en) | 2012-11-14 |
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| CN105031756B (en) * | 2015-08-31 | 2017-04-26 | 崔伟 | Extracorporeal circulation pipe of blood purifying device |
| CN109000844B (en) * | 2018-06-14 | 2020-11-06 | 王志华 | Pipeline pressure measuring device for thermal power plant |
| CN108730591B (en) * | 2018-07-11 | 2023-05-26 | 济南大学 | Balanced high-pressure wear-resistant angular regulating valve |
| CN113418649B (en) * | 2021-07-23 | 2024-12-20 | 中国电建集团贵州工程有限公司 | A pipeline pressure measuring device for thermal power plants |
| CN113586950B (en) * | 2021-08-06 | 2023-01-24 | 河北省特种设备监督检验研究院 | Monitoring device for boiler pressure container and using method thereof |
| CN113560298B (en) * | 2021-09-24 | 2021-12-28 | 南通优睿半导体有限公司 | A wafer surface cleaning device |
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| US4199992A (en) * | 1978-09-25 | 1980-04-29 | J. E. Myles, Inc. | Pressure indicator |
| GB2102351A (en) * | 1981-05-30 | 1983-02-02 | Jwt | Pressure indicating device |
| CN1598496A (en) * | 2003-09-17 | 2005-03-23 | 胡嘉林 | Precision metering system for transporting liquid and gas by pipeline |
| CN2731426Y (en) * | 2004-09-29 | 2005-10-05 | 濮阳市沃隆密封机械制造有限公司 | Safety pressure device |
| CN101071087A (en) * | 2007-04-29 | 2007-11-14 | 茹长渠 | Automobile tyre prewarning system |
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2010
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4199992A (en) * | 1978-09-25 | 1980-04-29 | J. E. Myles, Inc. | Pressure indicator |
| GB2102351A (en) * | 1981-05-30 | 1983-02-02 | Jwt | Pressure indicating device |
| CN1598496A (en) * | 2003-09-17 | 2005-03-23 | 胡嘉林 | Precision metering system for transporting liquid and gas by pipeline |
| CN2731426Y (en) * | 2004-09-29 | 2005-10-05 | 濮阳市沃隆密封机械制造有限公司 | Safety pressure device |
| CN101071087A (en) * | 2007-04-29 | 2007-11-14 | 茹长渠 | Automobile tyre prewarning system |
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