CN101975279B - Early warning stop valve - Google Patents
Early warning stop valve Download PDFInfo
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- CN101975279B CN101975279B CN2010105294817A CN201010529481A CN101975279B CN 101975279 B CN101975279 B CN 101975279B CN 2010105294817 A CN2010105294817 A CN 2010105294817A CN 201010529481 A CN201010529481 A CN 201010529481A CN 101975279 B CN101975279 B CN 101975279B
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Abstract
The invention discloses an early warning stop valve. a framework ring sheathed on a valve rod is arranged above an inversed sealing device of a valve bonnet and is provided with a filler A and a filler B, which are sheathed on the valve rod, a filler gland is arranged above the filler B, a spacer bush is arranged between the filler A and the filler B, one middle section of the spacer bush along the length direction of the valve rod is recessed inwards and is provided with a radial through hole communicated with the radial through hole of the spacer bush, a medium leakage detection hole is arranged on a cavity wall of the valve bonnet, and a leakage detection probe is arranged on the medium leakage detection hole so as to trigger a warning facility. The stop valve provided in the invention is sealed in a multi-stage way so that the detection cycle and the service life of the stop valve are effectively prolonged; and under the situation that the first several sealing stages are invalid and internal medium leakage occurs, the last sealing stage is still effective, and an early warning signal can be generated before the medium is leaked to the outside of the valve.
Description
Technical field
The present invention relates to a kind of stop valve.
Background technique
Stop valve be through manual rotation hand wheel with the moving up and down of the valve rod that drives stop valve, perhaps moving up and down of the valve rod of motivational drive stop valve, and then drive the up-down of flap realized it and opened and close.Existing stop valve mostly is a primary seal, perhaps is secondary seal, because the continuous switch of stop valve must cause between valve rod and the Sealing, cause wearing and tearing between the filler, produces the gap, very easily causes the medium through stop valve to leak outside.
People are also continuing for the improvement of stop valve, constantly improve the sealability of stop valve.For example: the flap in the valve body is connected one with valve rod now, and is set on the valve rod by sylphon seal, has realized the sealing of the first order, and the isolation of valve rod and medium has prolonged the working life of valve rod and stop valve.With the valve body make-up and place the back seal device in the valve gap, can under the not out-of-work situation of stop valve, realize the replacing of filler.
But in case above-mentioned seal failure, under the situation that stop valve is opened, medium will be along valve rod; See through Sealing and packing leaking to the outside, pressure is high more, and situation is serious more, and many high-risk media are particularly arranged in the chemical industry; For example: chlorine, liquid chlorine, hydrogen fluoride gas; Liquid gas and strong acid and strong base liquid, in case leak, consequence is hardly imaginable.
The sealing progression of stop valve is not enough at present, and structure is improper, causes the probability of dielectric leakage high, and repair rate is high; When dielectric leakage, can not make timely warning, judge accurately to help people; When normal the use, people know nothing for the sealing state of stop valve, can't intervene in advance; When it dielectric leakage occurs usually; Also be the moment of stop valve afterbody seal failure, this on-call maintenance and replacing for stop valve has brought great trouble and danger.
The safety consciousness of Along with people's constantly improves, and national government ensures that the resolution of people's safety of life and property is increasing.Prevent and be better than possible trouble, therefore, press for a kind of valve,, before particularly leaking appears in danger medium, can make promptly and accurately judgement and warning, will drop to minimum the loss of people's life and property to the medium of being flowed through in the valve.
Summary of the invention
The object of the present invention is to provide a kind of effectively multi-stage sealed scheme of sealing of stop valve that realizes, effectively prolong the repair cycle and the working life of stop valve; And can in preceding what seal failure, medium occurs under the situation of internal leakage, and the afterbody sealing is still effective, before medium can not leak into the valve outside, can produce early warning signal.
For achieving the above object, the technological scheme that the present invention adopts is:
The valve gap 5 that the early warning stop valve comprises valve body 1, place the valve body 1 inner flap 2 that cooperates with valve base sealing, be set in valve rod 3 and the seal bellows 4 that seals with valve rod 3, be fixed together with valve body 1 make-up and place the interior back seal device 12 of valve gap 5, run through valve gap 5 and back seal device 12 and the valve rod 3 that is fixedly connected with flap 2, be installed in the handwheel 18 and the support thereof of valve rod 3 the other ends; It is characterized in that: the skeleton ring 6 that is set in valve rod 3 is set on the back seal device 12 of valve gap 5; Filler A7 and the filler B11 that is set in valve rod 3 is set on skeleton ring 6; Gland 15 is set above filler B11; Between filler A7 and filler B11, spacer 10 is set, spacer 10 is recessed inwards along one section of the centre of valve rod 3 length directions, and offers radial direction through hole 19; Be connected with the radial direction through hole 19 of spacer 10; Offer dielectric leakage exploration hole 13 at valve gap 5 chamber walls, and survey on 13 holes at dielectric leakage the probe 14 that leaks hunting is installed, to trigger warning facility.
Be connected with dielectric leakage exploration hole 13 recited above, on the valve cover cavity wall corresponding, offer a calibrated holes 9, calibrated holes plug 8 is installed on calibrated holes with radial direction through hole 19 the other ends.
Described a kind of probe that leaks hunting is the bellows pressure probe that leaks hunting; Early warning bellows 14-3 is installed among the shell 14-5; The front end of early warning bellows 14-3 is connected with joint 14-2 through bellows gasket 14-1; Joint 14-2 is connected with dielectric leakage exploration hole 13; The rear end of early warning bellows 14-3 connects motion bar 14-4; The explosion-proof ceramic partition 14-6 that motion bar 14-4 passes shell 14-5 bottom and is arranged in shell 14-5 bottom enters into the closed chamber 14-7 that is connected to form by sealing cover 14-9 and shell 14-5 bottom, and the end that motion bar 14-4 is arranged in closed chamber 14-7 is provided with conducting plate 14-8, setting and the corresponding Alarm contactor 14-10 of conducting plate 14-8 on sealing cover 14-9.
Optional, an end that is arranged in closed chamber 14-7 at the above motion bar 14-4 is provided with the iron plate of a magnetic conduction, be provided with on the sealing cover 14-9 one to the iron plate induction of magnetic conduction near switch, can realize contactless induction of signal.
Identical function and purpose realize that the described probe 14 that leaks hunting can be pressure switch or pressure transducer.The described signal that leaks hunting probe 14 transmits via wireless device, can carry out remote monitoring.
Further, described valve gap 5 and spacer 10 are I-shaped structure along the longitudinal profile of valve rod 3 length directions.
From the above mentioned, the present invention has embodied following technique effect:
Stop valve of the present invention, the valve rod working position all is in sealing state, seals between valve rod and the Sealing; Do not receive the influence of medium, only wear first, second and third grade sealing, under the situation that promptly occurs behind seal bellows, skeleton ring, the filler A leaking at medium; Prior-warning device just can send alarm signal; But fourth stage sealing be filler B also in proper functioning, this moment, valve did not externally produce leakage, under the prerequisite that does not cause any property loss with personnel's injury; To trigger warning facility, reliably tell extraneous valve to safeguard and to change through the probe that leaks hunting realistically.Overcome at dielectric leakage outside, when having caused in various degree loss and injury of property and personnel, just found, just gone the defective that solves by the people with the stop valve of pre-structure.And the multi-stage sealed technological scheme through seal bellows, skeleton ring, three layers of lower sealing device of filler A and filler B one deck upper sealing device; The repair cycle of valve be can prolong greatly, also can after prior-warning device is reported to the police, enough replacings, engineering time be left simultaneously.
Description of drawings
Accompanying drawing 1: the overall construction drawing of an embodiment of the present invention.
Accompanying drawing 2: the structural representation of a kind of probe that leaks hunting of the present invention.
Accompanying drawing 3: valve gap of the present invention is along the longitudinal sectional drawing of shaft length direction.
Accompanying drawing 4: the stereogram of valve gap of the present invention.Among the figure: 1, valve body, 2, flap, 3, valve rod, 4, seal bellows, 5, valve gap, 6, skeleton ring; 7, filler A, 8, the calibrated holes plug, 9, calibrated holes, 10, spacer, 11, filler B, 12, the back seal device; 13, medium leak detection hole, 14, the probe that leaks hunting, 14-1, bellows gasket, 14-2, joint, 14-3, early warning bellows, 14-4, motion bar; 14-5, shell, 14-6, explosion-proof ceramic partition, 14-7, closed chamber, 14-8, conducting plate, 14-9, sealing cover, 14-10, Alarm contactor; 15, Gland, 16, supporting post, 17, the Stem Mut mounting plate, 18, handwheel, 19, radial direction through hole.
Specific embodiment
Through accompanying drawing and preferred embodiment the present invention is done further description below.
Referring to Fig. 1, on the valve body 1 of stop valve, offer medium import and outlet, valve body 1 inner flap 2 is fixedly connected with valve rod 3 and cooperates with the valve base sealing of valve body 1, realizes the throttling for medium.Seal bellows 4 and valve rod 3 sealing suits that valve body 1 is inner can prevent contacting of medium and valve rod 3, and it can be used for the occasion to the strictness of valve rod 3 seal requests; Can make valve rod 3 positions not have leakage; Do not have fluid loss, reduce energy loss, improve safety of factory equipment; Can prolong the working life of valve rod 3 effectively, not only improve the use energy efficiency, the Security that increases manufacturing facilities reduces maintenance frequency, reduces operating cost.Seal bellows 4 stretches with the up-down of valve rod 3, and its Maximum operating pressure depends on the compressive strength and the fatigue strength of seal bellows 4.
Seal bellows 4 is the first order sealing of stop valve of the present invention.
Valve body 1 and valve gap 5 are fixed through bolt, are provided with back seal device 12 at the center of the bottom of valve gap 5.Under the state that stop valve is opened, through the seal action of back seal device 12, can be implemented in does not influence under the valve normal working its replacing with the filler on top.
Valve gap 5 in the embodiment of the invention, in order to realize the demand of its set inside sealed member, it is the chamber shape structure of a hollow, it is connected with valve body 1 down, goes up to be connected with supporting post 16.Because it will possess the function that connects valve body 1 and supporting post 16 up and down, be I-shaped structure along the longitudinal profile of valve rod 3 length directions.
In the chamber of valve gap 5; Except the back seal device 12 that the bottom is provided with, also be provided with respectively of the present invention second and third, level Four sealing, i.e. skeleton ring 6, filler A7 and filler B11; And the spacer 10 between filler A7 and filler B11, valve rod 3 runs through described various piece respectively.
Skeleton ring 6 of the present invention is a novel sealing technique, referring to inventor's granted patent 200920313033.6.Its lips cartilage frame seal ring, its cross section roughly is down " V " shape, and its inboard is respectively equipped with inward flange up and down, and the relevant position of said valve gap is provided with corresponding annular groove, is used to hold lips cartilage frame seal ring.This novel regulating valve special for chlorine has simple in structure, good seal performance, closes little, the advantage of easy to leak not of torsion.
The skeleton ring 6 be set in valve rod 3 is set on the back seal device 12 of valve gap 5, filler A7 and the filler B11 that is set in valve rod 3 is set on skeleton ring 6, Gland 15 is set above filler B11, in order to seal and fixing filler B11.Between filler A7 and filler B11, be provided with spacer 10, spacer 10 is recessed inwards along one section of the centre of valve rod 3 length directions.Referring to Fig. 3, Fig. 4, spacer 10 is an I-shaped structure along the longitudinal profile of valve rod 3 length directions, and offers radial direction through hole 19, and radial direction through hole 19 helps leaking medium and outwards overflows from valve rod 3.Be connected with the radial direction through hole 19 of spacer 10, offer dielectric leakage exploration hole 13, and on dielectric leakage exploration hole 13, the probe 14 that leaks hunting is installed, to trigger warning facility at valve gap 5 chamber walls.
The quantity of skeleton ring 6 can be used one, for more reliably, the quantity of skeleton ring 6 can adopt two or more.
The leakage of medium possibly appear in the stop valve multiple switching.Medium just can be come the spacer 10 between filler A7 and filler B11 after passing first, second and third sealing of stop valve.Medium passes spacer 10 from the gap of valve rod 3 radial direction through hole 19 flows to dielectric leakage exploration hole 13.
Referring to Fig. 2; The probe that leaks hunting of present embodiment bellows comprises that two ends are provided with the shell 14-5 of screw thread; Early warning bellows 14-3 is installed among the shell 14-5; Early warning bellows 14-3 front end is connected with joint 14-2 through bellows gasket 14-1; Joint 14-2 is connected with dielectric leakage exploration hole 13, and the rear end of early warning bellows 14-3 connects motion bar 14-4, and the explosion-proof ceramic partition 14-6 that motion bar 14-4 passes shell 14-5 bottom and is arranged in shell 14-5 bottom enters into the closed chamber 14-7 that bottom sealing cover 14-9 and shell 14-5, is connected to form; The end that motion bar 14-4 is arranged in closed chamber 14-7 is provided with conducting plate 14-8, on sealing cover 14-9, is provided with and the corresponding Alarm contactor 14-10 of conducting plate 14-8.
Very little or when not having pressure when pressure, according to the spring performance that bellows self is had, can be automatically in a state of nature, conducting plate 14-8 and Alarm contactor 14-10 are in separated state among the closed chamber 14-7, externally do not have alarm output signal.When leaking appears in first three level sealing, under the effect of pressure medium, promote early warning bellows 14-3, drive motion bar 14-4 to closed chamber 14-7 one side shifting.Along with the increase of pressure, conducting plate 14-8 is with after Alarm contactor 14-10 contacts, and can trigger itself and the outside warning piece that is connected, the for example buzzer of sound alarm, loudspeaker, the beacon of light warning etc.At this moment, can transmit leakage signal out to external world, thereby reach the purpose of dielectric leakage early warning.
Another embodiment of the probe that leaks hunting of above-mentioned bellows is; Conducting plate 14-8 is replaced by the iron plate of a magnetic conduction; Sealing cover 14-9 central authorities be provided with one to the induction of the iron plate of magnetic conduction sensitive near switch, when early warning bellows 14-3 drives motion bar 14-4 to closed chamber 14-7 one side shifting, when reaching certain distance; Will produce actuating signal near switch, its warning piece that is connected with the outside can reach the function of warning.Owing to iron plate and near switch is contactless, therefore more reliable.
As another kind of embodiment, the probe 14 that leaks hunting that dielectric leakage exploration hole 13 is installed also can be a pressure transducer, and pressure transducer can become the size conversion of pressure correspondent voltage signal or current signal, handles for level unit, back.
The probe 14 that leaks hunting that dielectric leakage exploration hole 13 is installed also can be a pressure switch, and when the pressure of leaking medium reached certain numerical value, the inner contact of pressure switch just can be connected, and the back grade of alarm unit that is connected with the contact will reach the purpose of warning.
For because of dielectric leakage by leak hunting the probe 14 signals detected; Level unit, back can be provided with acoustic-optic alarm in the locality; Also can carry out the monitoring control room of remote transmission to center system to 14 signals detected of probe of leaking hunting, monitor and handle by central control room.The teletransmission of 14 signals detected of probe of leaking hunting can be adopted wire transmission, also can take wireless transmission, can be at the stop valve place signalization wireless launcher, at central control room radio receiver is set, realize wireless telecommunications.
Even pressure constantly increases, when puncturing bellows, because whole casing 14-5 still is in sealing state, medium can be toward external leakage, and stop valve can continue normal use.Can be not long but hold time, do not keep in repair for a long time yet and external leakage can occur.
During maintenance, rotation hand wheel 18 is closed back seal device 12, and the Gland 15 of dismounting filler B11 takes out filler B11 and spacer 10, fills up filler A7 again, and the parts of removal and installation in order compress Gland 12 again.
Further, be connected, on the valve gap corresponding 5 chamber walls, offer a calibrated holes 9, calibrated holes plug 8 is installed on calibrated holes 9 with radial direction through hole 19 the other ends of spacer 10 with described dielectric leakage exploration hole 13.When regularly or need detect the probe 14 that leaks hunting after the maintenance time, open a check and correction mouthful plug 8, whether the special-purpose verifying unit check probe 14 that leaks hunting is installed qualified.If defective, the probe 14 that then will leak hunting is changed, and adds sealer after qualified and shuts a check and correction mouthful plug 20 and get final product.
Conventional, supporting post 16 is set above valve gap 5, the top of supporting post 16 connects Stem Mut mounting plate 17, and handwheel 18 is installed on the Stem Mut mounting plate 17.Rotate handwheel 18 drive valve rods 3 and move up and down, thus the switch of control stop valve.
Claims (10)
1. early warning stop valve; Comprise valve body, place flap that valve inner cooperates with valve base sealing, be set in valve rod and the valve gap that is fixed together with the seal bellows of valve stem seal, with the valve body make-up and place back seal device in the valve gap, run through valve gap and back seal device and the valve rod that is fixedly connected with flap, the handwheel that is installed in the valve rod the other end and support thereof; It is characterized in that: the skeleton ring that is set in valve rod is set on the back seal device of valve gap; Filler A and the filler B that is set in valve rod is set on skeleton ring, above filler B, Gland is set, between filler A and filler B, spacer is set; Spacer is recessed inwards along one section of the centre of shaft length direction; And offer radial direction through hole, and be connected with the radial direction through hole of spacer, offer the dielectric leakage exploration hole at the valve cover cavity wall; And the probe that leaks hunting is installed on the dielectric leakage exploration hole, to trigger warning facility; The described probe that leaks hunting is the bellows pressure probe that leaks hunting; The early warning bellows is installed in the shell; Early warning bellows front end is connected with joint through bellows gasket; Joint is connected with the dielectric leakage exploration hole, and the rear end of early warning bellows connects motion bar, and the explosion-proof ceramic partition that motion bar passes outer casing bottom and is arranged in outer casing bottom enters into the closed chamber that is connected to form by sealing cover and outer casing bottom; The end that motion bar is arranged in closed chamber is provided with conducting plate, on sealing cover, is provided with and the corresponding Alarm contactor of conducting plate.
2. early warning stop valve according to claim 1 is characterized in that: on the valve cover cavity wall corresponding with the radial direction through hole the other end, offer a calibrated holes, be connected with described dielectric leakage exploration hole, the calibrated holes plug is installed on calibrated holes.
3. early warning stop valve; Comprise valve body, place flap that valve inner cooperates with valve base sealing, be set in valve rod and the valve gap that is fixed together with the seal bellows of valve stem seal, with the valve body make-up and place back seal device in the valve gap, run through valve gap and back seal device and the valve rod that is fixedly connected with flap, the handwheel that is installed in the valve rod the other end and support thereof; It is characterized in that: the skeleton ring that is set in valve rod is set on the back seal device of valve gap; Filler A and the filler B that is set in valve rod is set on skeleton ring, above filler B, Gland is set, between filler A and filler B, spacer is set; Spacer is recessed inwards along one section of the centre of shaft length direction; And offer radial direction through hole, and be connected with the radial direction through hole of spacer, offer the dielectric leakage exploration hole at the valve cover cavity wall; And the probe that leaks hunting is installed on the dielectric leakage exploration hole, to trigger warning facility: the described probe that leaks hunting is pressure switch or pressure transducer;
4. early warning stop valve according to claim 3 is characterized in that: on the valve cover cavity wall corresponding with the radial direction through hole the other end, offer a calibrated holes, be connected with described dielectric leakage exploration hole, the calibrated holes plug is installed on calibrated holes.
5. early warning stop valve according to claim 1 is characterized in that: the described signal that leaks hunting probe transmits via wireless device.
6. early warning stop valve according to claim 1 is characterized in that: described valve gap is an I-shaped structure along the longitudinal profile of shaft length direction.
7. early warning stop valve according to claim 1 is characterized in that: described spacer is an I-shaped structure along the longitudinal profile of shaft length direction.
8. early warning stop valve according to claim 3 is characterized in that: the described signal that leaks hunting probe transmits via wireless device.
9. early warning stop valve according to claim 3 is characterized in that: described valve gap is an I-shaped structure along the longitudinal profile of shaft length direction.
10. early warning stop valve according to claim 3 is characterized in that: described spacer is an I-shaped structure along the longitudinal profile of shaft length direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010105294817A CN101975279B (en) | 2010-11-03 | 2010-11-03 | Early warning stop valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105294817A CN101975279B (en) | 2010-11-03 | 2010-11-03 | Early warning stop valve |
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| CN101975279A CN101975279A (en) | 2011-02-16 |
| CN101975279B true CN101975279B (en) | 2012-07-25 |
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| CN2010105294817A Active CN101975279B (en) | 2010-11-03 | 2010-11-03 | Early warning stop valve |
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| CN101975279A (en) | 2011-02-16 |
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Effective date of registration: 20200409 Address after: 251700, Shandong, Binzhou Province, Huimin County, Mulberry Town, mulberry West Village Patentee after: SHANDONG FURUI INDUSTRY AND TRADE Co.,Ltd. Address before: Zibo City Development Zone, Shandong province 255000 Private Industrial Park Road No. 36 Min'an Patentee before: ZIBO HUIHUA VALVE INDUSTRY Co.,Ltd. |
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Application publication date: 20110216 Assignee: TIANJIN HUIHUA VALVE INDUSTRY Co.,Ltd. Assignor: SHANDONG FURUI INDUSTRY AND TRADE Co.,Ltd. Contract record no.: X2021980010596 Denomination of invention: Early warning stop valve Granted publication date: 20120725 License type: Common License Record date: 20211012 |