CN206019960U - Lift non-return valve work seal detection means - Google Patents

Lift non-return valve work seal detection means Download PDF

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Publication number
CN206019960U
CN206019960U CN201620902879.3U CN201620902879U CN206019960U CN 206019960 U CN206019960 U CN 206019960U CN 201620902879 U CN201620902879 U CN 201620902879U CN 206019960 U CN206019960 U CN 206019960U
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China
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valve
lift
return valve
medium
false
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CN201620902879.3U
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Inventor
董东升
朱马超
曹登洪
徐建泉
王灿灿
段游
黄英明
张本贺
白云长
张福雨
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China General Nuclear Power Corp
CGN Power Co Ltd
Yangjiang Nuclear Power Co Ltd
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China General Nuclear Power Corp
CGN Power Co Ltd
Yangjiang Nuclear Power Co Ltd
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Abstract

This utility model is related to a kind of lift non-return valve work seal detection means, including be threadedly coupled with the valve body of lift non-return valve (100) (110) false valve gap (200), for the power set (300) that inject pressure medium in false valve gap (200).False valve gap (200) are on lift non-return valve, after medium is injected in pipeline (211) entrance valve pocket by medium, by exhaust line (221) drain intracavity gas, when when valve cavity pressure is online with valve, system pressure is identical, close medium injection pipeline (211) and exhaust line (221) valve, confined space is formed in valve pocket, and now valve element (130) becomes unique leakage point with valve seat (120).Pressurize 5min, now the pressure of observation precision pressure gauge (420), if valve cavity pressure reduces, illustrates there is leakage, and valve tightness are unqualified;If not reducing in valve pocket, No leakage is described, valve tightness are qualified.

Description

Lift non-return valve work seal detection means
Technical field
This utility model is related to the detection of pipe-work, in particular, be related to petrochemical industry, metallurgy, electric power, water conservancy, The lift non-return valve work seal detection means of the technical fields such as urban construction, fire-fighting, machinery, coal, food, medicine.
Background technology
For the lift non-return valve of flange connection, typically valve integral demounting can be got off after valve maintenance Valve tightness are verified in the bulge test of row valve;For the lift non-return valve being welded on pipeline, conventional authentication valve seal The method of property is:The general sealing for confirming valve by blue oil test after the completion of valve maintenance.Therefore these methods are had Shortcoming have:
1) for the valve of flange connection, suppressing offline needs to dismantle again and return dress valve, can increase the duration, increase people Power puts into, and increases flange gasket consumption, increases the risk of flange leakage;
2) blue oil test's checking sealing precision is relatively low;
3) blue oil test's the result is relevant with personal experience, has certain subjectivity;
4) blue oil test is qualified, and valve there will still likely be leakage;
5) for sealing requirements are high, and the serious system of consequence is leaked, blue oil checking risk is higher.
Utility model content
The technical problems to be solved in the utility model is:A kind of lift non-return valve work seal detection dress is provided Put, solve the problems such as lift non-return valve precision when blue oil test is carried out is relatively low, increase flange gasket consumes.
This utility model is in order to solve the above problems, there is provided technical scheme be:There is provided a kind of lift non-return valve online Device for detecting sealability, including be connected with the valve body screw thread of lift non-return valve false valve gap, for pressure medium is injected institute The power set in false valve gap are stated, medium inlet and air vent on the false valve gap, is provided with, the medium inlet passes through pipeline It is connected with the power set;Be provided with medium isolating valve on the pipeline being connected with the medium inlet, the medium every Pressure gauge is provided between valve and the medium inlet, on the pipeline being connected with the air vent, air bleeding valve is provided with.
In the lift non-return valve work seal detection means that this utility model is provided, the false valve gap includes arranging Externally threaded lid body and extend from the lid body with what the valve seat of the lift non-return valve was abutted against close Envelope portion, the bottom of the sealing are mounted with that gasket seal and the valve seat planes of the lift non-return valve are abutted against.
In the lift non-return valve work seal detection means that this utility model is provided, the inner surface of the lid body It is provided with the valve element guide part being adapted with the valve element shape of the lift non-return valve.
In the lift non-return valve work seal detection means that this utility model is provided, in the appearance of the lid body Spiral shell side is set on face, and the medium inlet and the air vent is opened up in the spiral shell side.
In the lift non-return valve work seal detection means that this utility model is provided, the medium inlet and described Air vent is provided with female thread.
In the lift non-return valve work seal detection means that this utility model is provided, in the power set and institute Give an account of setting vacuum tank between matter isolating valve.
In the lift non-return valve work seal detection means that this utility model is provided, the power set are manual Pump or air driven pump, arrange filter rising between source inlet and the power set.
Implement this utility model, have the advantages that:
1) kit small volume, lightweight, convenient in carrying, scene are with strong applicability;
2) by Pneumatic booster pump (or increasing pump manually), power source can be selected according to field condition, in addition test pressure Adjustable, can meet and different suppress demand;
3) certainty of measurement is high, and this device is configured with 0.2 grade of digital display and/or pointer pressure gauge, can precision to 0.01bar;
4) power set increase accumulator, with medium volume in increase system, reduce such environmental effects;
5) false valve gap is detachable, replaceable, goes for the non-return valve of different bores, different size.
Description of the drawings
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Test principle figures of the Fig. 1 for this utility model lift non-return valve work seal detection means preferred embodiment;
Fig. 2 is the seal tightness test principle of false valve gap in this utility model lift non-return valve work seal detection means Figure;
Fig. 3 is that the plan structure of false valve gap in this utility model lift non-return valve work seal detection means is illustrated Figure;
Fig. 4 is that the sectional structure of false valve gap in this utility model lift non-return valve work seal detection means is illustrated Figure.
Specific embodiment
Embodiment of the present utility model is specifically described below in conjunction with accompanying drawing.
For the lift non-return valve of flange connection, typically valve integral demounting can be got off after valve maintenance Valve tightness are verified in the bulge test of row valve;For the lift non-return valve being welded on pipeline, conventional authentication valve seal The method of property is:The general sealing for confirming valve by blue oil test after the completion of valve maintenance.Main wound of the present utility model New point is to provide a kind of work seal detection that need not dismantle lift non-return valve, is situated between by the installation and pressure of false valve gap The injection of matter, reduces situation during normal work, accurate detection its sealing.
Fig. 1 shows the test of 100 work seal detection means preferred embodiment of this utility model lift non-return valve Principle, as shown in figure 1, the detection means includes false valve gap 200 and power set 300.
200 structure of false valve gap is similar with the valve cover structure part of live lift non-return valve 100, by being threaded into valve body 110 parts are threadedly coupled with the valve body 110 of lift non-return valve 100.Medium inlet 210 and aerofluxuss are provided with false valve gap 200 Mouth 220, is respectively mounted medium injection pipeline 211 and exhaust line 221.False valve gap 200 is removable, and different manufacturers are produced Lift non-return valve 100, or the lift non-return valve 100 of the different bores of identical manufacturer production, valve gap size be different, So as to need using different false valve gaps 200.Therefore, scene needs to process different size according to the actual size of equipment, with full Sufficient work seal detection needs.
Power set 300 are used for injecting pressure medium in false valve gap 200, the species of medium and lift non-return valve 100 Purposes related, i.e., the pipeline residing for lift non-return valve 100 is used for water conservancy diversion which kind of medium, and which kind of is just situated between by power set 300 In the false valve gap 200 of matter injection.Medium inlet 210 is connected with power set 300 by pipeline;It is connected with medium inlet 210 Medium isolating valve 410 is provided with pipeline, is provided with pressure gauge 420 between medium isolating valve 410 and medium inlet 210, with Air bleeding valve 430 is provided with the pipeline that air vent 220 is connected.
After the threaded connection valve body 110 of false valve gap 200 of the work seal detection means, the inner space of false valve gap 200 Isolate with 130 top of valve element jointly and be created as airtight chamber, the pressure medium of demand is noted by pipeline by power set 300 Enter the airtight chamber on 130 top of valve element, after reaching demand pressure, medium isolating valve 410 and air bleeding valve 430 are closed, by close The observation pressure change of pressure gauge 420 of closed chamber room, so that judge valve seal situation.
Preferably, vacuum tank 440 is set between power set 300 and medium isolating valve 410, for stablizing power set 300 outlet pressure, it is to avoid because experimental result deviation caused by the outlet pressure of power set 300 is unstable.Other are mainly attached Part also include for contain the media Containers 460 of medium, the delivery gauge 470 between power set 300 and vacuum tank 440, Unloader 480 between 300 export pipeline of power set and media Containers 460.
Preferably, power set 300 are manual pump or air driven pump, set between air source inlet 490 and power set 300 Put filter 450, it is ensured that source of the gas free from admixture enters power set 300.Can also set between filter 450 and power set 300 Air relief valve 491 and source of the gas pressure gauge 492 is put, the moment detects bleed pressure.Air driven pump directly from outside producer product, for example, is selected With the pneumatic pressuring pump of German HOCHDRUCKTECHNIK manufacturer productions, it is 1~10bar to supply bleed pressure scope, and output is most Big pressure is 90bar, and the air driven pump physical dimension is little, and pressure limit is big, with the preferable suitability, in addition can be according to reality Situation is purchased;Manual pressuring pump can be according to existing manual pressuring pump, and the pressure limit for needing is selected, and is selected on demand Take.
Fig. 2 shows the test of false valve gap 200 in 100 work seal detection means of this utility model lift non-return valve Principle, as shown in Fig. 2 lift non-return valve 100 includes that valve body 110, valve seat 120 and lift are moved for control valve The valve element 130 of switch, valve inlet 140, valve export 150.When reverse fluid flow, valve element 130 falls into valve seat 120 Put, valve inlet is closed, prevent reverse fluid flow.False valve gap 200 include being provided with externally threaded lid body 230 and The sealing 240 abutted against with lift non-return valve 100 valve seat 120 that is extending from lid body 230, sealing 240 Bottom is mounted with that gasket seal 250 and 120 plane of valve seat of lift non-return valve 100 are abutted against.Due to false valve gap 200 and valve Between body 110,120 plane of valve seat pushed down by threaded connection, gasket seal 250, forms confined space in valve pocket, now valve element 130 with Valve seat 120 becomes unique leakage point.Pressure medium is introduced valve pocket by power set 300, and is built using false valve gap 200 Li Liao airtight chamber, realizes the detection of real valve slip after line.
200 structure of false valve gap is similar with the valve cover structure part of live lift non-return valve 100, by being threaded into valve body , there is valve element guide part 260 110 parts inside false valve gap 200, it is ensured that valve element 130 correctly returns seat;The setting of gasket seal 250 is true Guarantor suppresses non-return valve and will not leak into valve upstream and downstream pipeline;In addition medium inlet 210 and air vent 220 guarantee to suppress medium Enter the exclusion with inner air;Additionally include and the devices such as the pipeline of external connection, medium isolating valve 410.
The bottom of sealing 240 be install gasket seal 250 groove, by install gasket seal 250 for example with flute profile The teflon gasket that shape is adapted ensures that the sealing of lower part, medium are not flowed into the upper and lower outbound pipeline of valve;Threaded portion Screw in valve body 110, it is ensured that connection is reliable;Two apertures are provided with top spiral shell side 231, respectively as medium inlet 210 and aerofluxuss Mouth 220, install medium injection pipeline 211 and exhaust line 221, are provided with isolating valve on exhaust line 221.Medium is by being situated between After matter injection pipeline 211 is entered in valve pocket, by 221 drain intracavity gas of exhaust line, when valve cavity pressure and valve exist When system pressure is identical during line, medium injection 221 valve of pipeline 211 and exhaust line is closed, confined space, side in valve pocket, is formed Boundary checks No leakage, and now valve element 130 becomes unique leakage point with valve seat 120.Pressurize 5min, now observes precision pressure gauge 420 pressure, if 420 reading of pressure gauge reduces, illustrates there is leakage between 130 valve seat 120 of valve element, and valve tightness do not conform to Lattice;If 420 reading of pressure gauge does not reduce, valve element 130 valve seat, 120 No leakages are described, valve tightness are qualified.Additionally, needing Ensure work seal detection means and connecting pipeline border No leakage, sealing is good.
Fig. 3 shows Depending on structure, Fig. 4 shows the section view of false valve gap 200 in 100 work seal detection means of this utility model lift non-return valve Structure, as shown in Figure 3,4, the inner surface setting of lid body 230 is had and is adapted with 130 shape of valve element of lift non-return valve 100 Valve element guide part 260.The valve element 130 of lift non-return valve 100 is usually column structure, and within the chamber has valve element guide part 260, Guarantee that valve element 130 is taken a seat normally;
Spiral shell side 231 is set on the outer surface of lid body 230, and medium inlet 210 and air vent is opened up in spiral shell side 231 220.200 upper part of false valve gap is spiral shell side 231, and such as hexagonal spiral shell side 231 is selected into vacation by spanner when installing false valve gap 200 Valve gap 200, and ensure the decrement and certain sealing force of lower gasket by certain force;Medium inlet 210 and air vent 220 connectivity ports for being provided with female thread, medium injection pipeline 211 and exhaust line 221 arrange the external screw thread being adapted, just In Fast Installation.
By taking air driven pump as an example, (manual pump process is similar to, and during use unclamps joint, pulls down air driven pump, installs manually below Pump), the operating process of 100 work seal detection means of this utility model lift non-return valve is described:
1) teflon gasket will be installed in 200 lower channel of false valve gap, false valve gap 200 is screwed in scene needs checking In valve body 110, and suitably tightened with spanner;
2) source of the gas is accessed by power set 300 by snap joint, and is adjusted for the air relief valve 491 on air circuit, will pressure Power is adjusted to minima;
3) power set 300 are coupled together with false valve gap 200 with hydralic hose, by the air bleeding valve 430 on false valve gap 200 Standard-sized sheet;
4) media Containers 460 are opened, and water is poured into water tank with water pipe by such as tank lid, and observation high water tank is suitable;
5) air relief valve 491 in gas circuit, the air of purging line are adjusted;
6) after the completion of pipeline air exhaust water action, air relief valve 491 and unloader 480 is closed, when pressure is that 5bar is acted on, is beaten The aerofluxuss that the air valve 430 that begins to rehearse is carried out in lift non-return valve 100 notice air vent 220 can not be needed to carry out two to people and equipment more Secondary, and notice that observing pointer pressure gauge 420 is preferably digital display manometer 420, until suppressing the operating pressure for requiring, records number The pressure change of aobvious pressure gauge 420.And the leakage situation of valve is judged by the change of 420 pressure of pressure gauge.Need especially to say Bright, the operating pressure of above-mentioned requirements is pressure when lift non-return valve 100 is connected to normal work on pipeline, this practicality Basic principle of the new work seal detection means when its sealing is detected is situation when reducing normal work.
This utility model lift non-return valve work seal detection means, through the peace of unit up stage a few deck valve doors Note non-return valve test is disposably qualified, and the valve after checking is qualified did not occurred any exception during unit operation yet, and existing The field term of execution can effectively reduction of erection time and the metering of reduction staff collective.Through on-site verification and confirmation, the work seal The property detection means suitability is wide, easy to operate, highly reliable.
This utility model technology is as follows to the contribution made by power plant's productivity ratio:
1st, economic benefit:
For 1, power station unit, 7 deck valve door, overhaul is often taken turns, when the up stage 25bar peaces note non-return valve of unit is tested, Have a deck valve door sealing test unqualified, then need spend time be:5 days (unit falls back on low low water level)+2 days (1 non-return valves Maintenance)+5 days (unit is up to 25bar)=12 day, economic benefit 1000W generated electricity for 1 day according to 1 unit then avoided calculating There is exceeded minimum saving expense 12*1000W=1.2 hundred million of internal hemorrhage due to trauma in 1 deck valve door.If in other set states, the loss for being brought To be bigger;
2nd, other benefits:
A, maintenance duration can be shortened using the specific purpose tool, improve maintenance qualification rate, can largely shorten workman and exist High dose area is measured by photograph;
B, for band seal weld lift non-return valve, every time maintenance is required to cutting sealing weldering, after seal weld cuts 3 times, Valve need scrap, using the specific purpose tool after, valve service life increase.
Embodiment of the present utility model is described above in conjunction with accompanying drawing, but this utility model is not limited to The specific embodiment that states, above-mentioned specific embodiment be only schematically, rather than restricted, this area common Technical staff under enlightenment of the present utility model, without departing from this utility model objective and scope of the claimed protection situation Under, a lot of forms can be made also, these are belonged within protection of the present utility model.

Claims (7)

1. a kind of lift non-return valve work seal detection means, it is characterised in that include and lift non-return valve (100) False valve gap (200) that valve body (110) is threadedly coupled, the power set for injecting pressure medium in false valve gap (200) (300) medium inlet (210) and air vent (220) are provided with false valve gap (200), and medium inlet (210) pass through Pipeline is connected with the power set (300);Medium isolating valve is provided with the pipeline being connected with the medium inlet (210) (410) pressure gauge (420) is provided between medium isolating valve (410) and the medium inlet (210), with the row Air bleeding valve (430) is provided with the pipeline that QI KOU (220) is connected.
2. lift non-return valve (100) work seal detection means according to claim 1, it is characterised in that described False valve gap (200) include be provided with externally threaded lid body (230) and extend from lid body (230) with institute State the sealing (240) that the valve seat of lift non-return valve (100) is abutted against, the bottom of sealing (240) is mounted with close Gasket (250) is abutted against with valve seat (120) plane of lift non-return valve (100).
3. lift non-return valve (100) work seal detection means according to claim 2, it is characterised in that described The inner surface setting of lid body (230) has the valve element being adapted with valve element (130) shape of lift non-return valve (100) to lead To portion (260).
4. lift non-return valve (100) work seal detection means according to claim 2, it is characterised in that in institute State on the outer surface of lid body (230) setting spiral shell side (231), open up on the spiral shell side (231) medium inlet (210) and Air vent (220).
5. lift non-return valve (100) work seal detection means according to claim 1, it is characterised in that described Medium inlet (210) and the air vent (220) are provided with female thread.
6. lift non-return valve (100) work seal detection means according to claim 1, it is characterised in that in institute State.
7. lift non-return valve (100) work seal detection means according to claim 1, it is characterised in that described Power set (300) are manual pump or air driven pump, arrange filter between air source inlet and the power set (300) (450).
CN201620902879.3U 2016-08-18 2016-08-18 Lift non-return valve work seal detection means Active CN206019960U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107179169A (en) * 2017-06-14 2017-09-19 中广核工程有限公司 A kind of nuclear power station check valve action test set and test method
CN108562408A (en) * 2018-03-26 2018-09-21 广东鸿图南通压铸有限公司 A kind of device of the unidirectional Pcv valve leakproofness of independent detection

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107179169A (en) * 2017-06-14 2017-09-19 中广核工程有限公司 A kind of nuclear power station check valve action test set and test method
CN108562408A (en) * 2018-03-26 2018-09-21 广东鸿图南通压铸有限公司 A kind of device of the unidirectional Pcv valve leakproofness of independent detection

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