CN103115191A - Non-glue-injection high-pressure leak point under-pressure plug device - Google Patents

Non-glue-injection high-pressure leak point under-pressure plug device Download PDF

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Publication number
CN103115191A
CN103115191A CN2013100584874A CN201310058487A CN103115191A CN 103115191 A CN103115191 A CN 103115191A CN 2013100584874 A CN2013100584874 A CN 2013100584874A CN 201310058487 A CN201310058487 A CN 201310058487A CN 103115191 A CN103115191 A CN 103115191A
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China
Prior art keywords
valve
pressure
annular recess
diameter
rubber seal
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Granted
Application number
CN2013100584874A
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Chinese (zh)
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CN103115191B (en
Inventor
孙建涛
刘营泽
王纪宏
冯志强
王红军
程红星
吕永刚
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DATANG LINZHOU THERMOELECTRICITY Co Ltd
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DATANG LINZHOU THERMOELECTRICITY Co Ltd
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Priority to CN201310058487.4A priority Critical patent/CN103115191B/en
Publication of CN103115191A publication Critical patent/CN103115191A/en
Application granted granted Critical
Publication of CN103115191B publication Critical patent/CN103115191B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The invention discloses a non-glue-injection high-pressure leak point under-pressure plug device and relates to a hermetical mechanical device. The non-glue-injection high-pressure leak point under-pressure plug device comprises a leak plug fixture and a fixing device. The leak plug fixture comprises a barrel-type fixture body, and a fixture cavity is formed in the fixture body and communicated with a pipeline which is directly welded to the fixture body and provided with a pipe valve. The fixture body covers on a valve bonnet of the pipe valve and is fixed by the fixing device. A valve stem through hole is arranged on the top of the fixture body and allows a valve stem to penetrate. An annular groove A is arranged on the bottom wall of the fixture body, and an O-shaped rubber sealing ring A is built in the annular groove A. An annular groove B is arranged around the valve stem through hole, and an O-shaped rubber sealing ring B is built in the annular groove B. The non-glue-injection high-pressure leak point under-pressure plug device has the advantages of simple structure, convenience in operation, good leak plug effect, no welding, applicability to under-pressure plug of leaks of combustible explosive oil systems, balance sealing of same medium pressure, capability of normal operation after leaks of the valve stem is plugged under pressure, no glue and no pollution after under-pressure leak plug.

Description

Non-injection rubber type high-pressure leakage point tape-pressure leakage clogging device
Technical field
The present invention relates to field of mechanical technique, is further a kind of sealing machine device, especially a kind of tape-pressure leakage clogging device of non-injection rubber type high-pressure leakage point.
Background technique
Existing injection rubber type pressure sealing technique: make the injecting glue mold, mold is arranged on leakage position, then inject sealing leakage glue in mold, make sealing leakage glue be full of the mold chamber, reach the purpose of stopping a leak.
As shown in Figure 1, the top of valve body 1 is provided with valve gap 2, the interior medium channel 6 that arranges of valve body 1, medium channel 6 middle parts are communicated with switch cavity 5, the switch cavity 5 vertical valve rod holes of tops connection, and valve rod hole leads to valve gap 2, the built-in valve rod 3 of valve rod hole, valve plug 7 is placed in switch cavity 5; Whether opening of medium channel 6 is by the valve plug 7 of valve rod 3 bottoms is controlled; Be provided with the valve stem seal groove in valve gap 2, the built-in seal ring 4 of valve stem seal groove is used for the gap between sealed valve stem 3 and valve rod hole.
When seal ring damaged, from the gap between sealed valve stem 3 and valve rod hole, working medium (oil plant) can leak out.
For addressing this problem, be provided with the leak stopping mold.Its structure as shown in Figure 2 and Figure 3, the leak stopping mold comprises barrel-shaped carcass 8, interior formation tire chamber 10, tire chamber 10 connecting pipes 12, pipeline 12 is directly welded on carcass 8, is provided with the effect that pipe valve 9(serves as rubber injecting valve herein on pipeline 12); Valve rod perforation 11 is set at carcass 8 tops, is used for passing valve rod 3.
During installation, as shown in Fig. 4,5, edge under the leak stopping mold is placed on valve body, it is non-leakage for guaranteeing that the tire chamber 10 of leak stopping mold has covered valve gap 2(, usually need carcass 8 is welded on valve body 1), bottom plate 15 is placed in valve body 1 time, upper mounted plate 13 is placed on the leak stopping mold, upper mounted plate 13 and bottom plate 15 are tightened up by connecting bolt 14.Form the sealing chamber between mold and valve gap 2.
Afterwards, open pipe valve 9, the gum-injecting port of colloid-injecting gun is connected on pipe valve 9, with colloid-injecting gun injecting glue in the mold, the sealing chamber that glue is full of form between mold and valve body.After sealing leakage glue is full of, leaks and eliminate.In the injecting glue process, a small amount of sealing leakage glue can along the reverse working medium that enters in gap between valve rod and valve gap, pollute working medium.
Prior art has following defective: 1, pressure sealing often need to carry out online weld job at leakage position, and existing technique is not suitable for inflammable and explosive oil system pressure sealing.2, after the leakage at existing injection rubber type pressure sealing process treating valve door bar position, valve can't carry out switching manipulation, is not suitable for the pressure sealing that needs the valve door bar of often operation position to leak.3, existing injection rubber type leak-stopping technique, sealing leakage glue has a small amount of colloid and enters in working medium along leakage position is reverse under the effect of high-pressure injection plastic rifle, medium is produced certain pollution, and the method is not suitable for the pressure sealing of the demanding lubricating oil system of turbidity test, hydraulic oil system leakage.
Summary of the invention
The purpose of this invention is to provide a kind of non-injection rubber type high-pressure leakage point tape-pressure leakage clogging device, it adopts non-glue leak-stopping technique, but Operating Pressure effectively solves high-pressure leakage point pressure sealing problem.Do not produce simultaneously pollution.
The objective of the invention is to realize by following scheme:
O-ring seals is to be circular annulus by its cross section that the oil resistant rubber compacting forms.Its action principle is to utilize O-ring seals that certain precompression is arranged when mounted, is subjected to simultaneously the oil pressure effect to produce distortion, is close to sealing surfaces and realizes sealing.O-ring seals is most widely used compact type Sealing, and is used in large quantities static seal, and sealing load can reach 80MPa.Its specification internal diameter and diameter of section (d * d 0) represent.O-ring seals and all standardization of installation groove thereof.O-ring seals is simple in structure, good airproof performance, easy for installation, cost is low, and high low pressure is all available, and has certain auto-compensation ability after wearing and tearing.
This device utilizes the excellent sealing effect of O shape rubber seal to realize sealing.The characteristics of O shape rubber seal are just can bear high pressure after installing fully, this technique is fully observed these characteristics, before O shape rubber seal installs fully, do not make O shape rubber seal bear any pressure, after installing fully, O shape rubber seal bears again high pressure, the purpose of reach reliable sealing, stopping a leak.
(1) respectively under mold along establishing O shape rubber seal with valve body junction plane place, valve rod place, utilize the excellent sealing performance of O shape rubber seal to seal, replaces in former technique by the sealing leakage glue filling chink, stop up the gap and realize the technique that seals.
(2) O shape rubber seal has and just can bear the characteristics of high pressure after installing fully, according to these characteristics, before being clamped fully by fixture, mold drains working medium (oil plant) by draining valve, the mold cavity indoor pressure can not be set up, (this moment, O shape rubber seal possessed the condition of bearing high pressure) closes draining valve again after mold is fully clamped, namely eliminated leakage this moment, reached the purpose of outaged equipment not system, canbe used on line pressure sealing.
Concrete scheme is:
Non-injection rubber type high-pressure leakage point tape-pressure leakage clogging device comprises leak stopping mold and fastening device, and the leak stopping mold comprises barrel-shaped carcass, interior formation tire chamber, and tire chamber connecting pipe, pipeline is directly welded on carcass, is provided with pipe valve on pipeline; Carcass covers on the valve gap of valve body, and fastening by fastening device institute; The valve rod perforation is set at the carcass top, is used for passing valve rod; It is characterized in that: at the bottom of carcass along annular recess A is set on wall, annular recess A is built-in with O shape rubber seal A; Around the valve rod perforation, annular recess B is set, annular recess B is built-in with O shape rubber seal B.
Further:
Described annular recess A cross section is rectangle, and its opening is to edge, the end; Annular recess B cross section is rectangle, and its opening is inside.
The inside and outside diameter of described annular recess A respectively with the inside and outside equal diameters of O shape rubber seal A, the little 0.4-0.6 mm of diameter of section of the depth ratio O shape rubber seal A of annular recess A is preferably 0.5mm; The outer diameter of annular recess B is preferably 0.10mm than the little 0.09-0.11 mm of outer diameter of the O shape rubber seal B that selects, and the little 0.14-0.16 mm of diameter of section of the aspect ratio O shape rubber seal B of annular recess B is preferably 0.15mm; The inner diameter of the O shape rubber seal B that selects is preferably 0.3mm than the little 0.2-0.3 mm of stem diameter.Above-mentioned difference in size is used for guaranteeing that O-ring seals has certain precompression when mounted.
Described O shape rubber seal A, O shape rubber seal B all select fluorine rubber material heat-resisting, fine corrosion resistance.
The structure of described valve body is: the top of valve body is provided with valve gap, and medium channel is set in valve body, be communicated with switch cavity in the middle part of medium channel, and the vertical valve rod hole of switch cavity top connection, valve rod hole leads to valve gap, the built-in valve rod of valve rod hole, valve plug is placed in switch cavity; Whether opening of medium channel is by the valve plug of stem lower portion is controlled; Be provided with the valve stem seal groove in valve gap, the built-in seal ring of valve stem seal groove is used for the gap between sealed valve stem and valve rod hole.
Further again:
A kind of installation method of non-injection rubber type high-pressure leakage point tape-pressure leakage clogging device, it is characterized in that: at first, the leak stopping mold is placed on the valve body of leakage, the carcass of leak stopping mold has covered valve gap (being that valve gap is placed in the tire chamber), open the draining valve draining, the pressure in mold can not be set up; Secondly, bottom plate is placed under valve body, upper mounted plate is placed on the leak stopping mold, upper mounted plate and bottom plate are tightened up the sealing chamber that forms between mold and valve gap by connecting bolt; After mold is compacted, close pipe valve, in mold, the pressure in (tire chamber) reaches the pressure of working medium gradually; At this moment, leak stopping work is eliminated, has been completed in leakage.
The invention has the beneficial effects as follows: 1, simple in structure, easy and simple to handle, plugging effect is good.2, need not the high-pressure leakage point is carried out in wire bonding, comprise inflammable and explosive oil system pressure sealing needs thereby be applicable to various occasions.3, solved in traditional blocking method the problem that can't operate after the under-pressure leakage-plugging of valve door bar position.Than prior art, glue-free due to the pressure medium balanced seal, thereby adopt this technique leak stopping late gate to work, normal running.4, solved in traditional blocking method, after pressure sealing, medium has been produced the problem of polluting.Same medium is adopted in sealing, and is glue-free, therefore pollution-free.
Description of drawings
Fig. 1 is prior art valve mechanism schematic diagram, Fig. 2 is prior art leak stopping positioner structure schematic diagram, Fig. 3 is that the A of Fig. 2 is to structural representation, Fig. 4 is the prior art scheme of installation, Fig. 5 be the A of Fig. 4 to schematic diagram, Fig. 6 is leak stopping positioner structure schematic diagram of the present invention, Fig. 7 is scheme of installation of the present invention, Fig. 8 is O shape coil structures schematic diagram, and Fig. 9 is the seal with O ring principle schematic.
In figure: 1 is valve body, and 2 is valve gap, and 3 is valve rod, and 4 is seal ring, 5 is switch cavity, and 6 is medium channel, and 7 is valve plug, 8 is carcass, and 9 is valve, and 10 is the tire chamber, 11 are the valve rod perforation, and 12 is pipeline, and 13 is upper mounted plate, 14 is connecting bolt, and 15 is bottom plate, and 16 is O shape rubber seal A, 17 is O shape rubber seal B, and 18 are the situation before the precompression of O shape circle, and 19 is the situation under O-ring seals pressure-bearing working state.
Embodiment
In order to make those skilled in the art person understand better the present invention program, and above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with embodiment.
Valve body structure as shown in Figure 1, the top of valve body 1 is provided with valve gap 2, the interior medium channel 6 that arranges of valve body 1, medium channel 6 middle parts are communicated with switch cavity 5, the switch cavity 5 vertical valve rod holes of tops connection, and valve rod hole leads to valve gap 2, the built-in valve rod 3 of valve rod hole, valve plug 7 is placed in switch cavity 5; Whether opening of medium channel 6 is by the valve plug 7 of valve rod 3 bottoms is controlled; Be provided with the valve stem seal groove in valve gap 2, the built-in seal ring 4 of valve stem seal groove is used for the gap between sealed valve stem 3 and valve rod hole.
The leak stopping mold as shown in Figure 6, the leak stopping mold comprises barrel-shaped carcass 8, interior formation tire chamber 10, tire chamber 10 connecting pipes 12, pipeline 12 is directly welded on carcass 8, is provided with pipe valve 9 on pipeline 12; Valve rod perforation 11 is set at carcass 8 tops, is used for passing valve rod 3, the diameter of valve rod perforation 11 is than the large 0.1mm of stem diameter; Along annular recess A is set on wall, annular recess A cross section is rectangle at 8 ends of carcass, and its opening is to edge, the end; Annular recess A is built-in with O shape rubber seal A, (inner diameter is seen the d in Fig. 8 to the inside and outside diameter of annular recess A with the inside and outside equal diameters of the O shape rubber seal of selecting respectively, outer diameter is seen the D in Fig. 8, lower same), the diameter of section of the depth ratio O shape rubber seal of annular recess A (is seen the d in Fig. 8 0) little 0.5mm; Annular recess B is set around valve rod perforation 11, and annular recess B cross section is rectangle, and its opening is inside, namely towards valve rod.Annular recess B is built-in with O shape rubber seal B17, and the outer diameter of annular recess B is than the little 0.10mm of outer diameter D of the O shape rubber seal B17 that selects, the little 0.15mm of diameter of section of the aspect ratio O shape rubber seal B17 of annular recess B.The inner diameter of the O shape rubber seal B17 that selects should be than the little 0.3mm of stem diameter.Above-mentioned difference in size is used for guaranteeing that O-ring seals has certain precompression when mounted, and after precompression, the cross section of O-ring seals is become by circle and meets annular recess A or annular recess B long-round-shape or class rectangle.Above-mentioned two O shape rubber seal are all selected fluorine rubber material heat-resisting, fine corrosion resistance.Referring to Fig. 8 and Fig. 9, in figure, p represents medium (oil) approach axis.
During installation, as shown in Figure 7, at first, the leak stopping mold is placed on the valve body of leakage, the tire chamber 10 of leak stopping mold has covered valve gap 2, opens the draining valve draining, and the pressure in mold can not be set up.
Secondly, bottom plate 15 is placed in valve body 1 time, upper mounted plate 13 is placed on the leak stopping mold, upper mounted plate 13 and bottom plate 15 are tightened up by connecting bolt 14.The sealing chamber that forms between mold and valve gap 2.Use the clamp mold, make that mold is pressed on valve body, gapless and certain tight power will be arranged between mold and valve body.Close pipe valve 9 after mold is compacted, the pressure in mold reaches the pressure of working medium gradually.At this moment, leak stopping work is eliminated, has been completed in leakage.After leak stopping is completed, valve rod still can carry out normal open and close operation and can not occur leaking.Solved the problem that can't operate after the original device leak stopping.Whole Process of Leaking Stoppage can not pollute working medium.
In prior art, pipeline 12 is used for injecting glue; In the present invention, pipeline 12 is used for row's medium (oil).
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement are within all should being encompassed in protection scope of the present invention.

Claims (7)

1. non-injection rubber type high-pressure leakage point tape-pressure leakage clogging device, comprise leak stopping mold and fastening device, and the leak stopping mold comprises barrel-shaped carcass, interior formation tire chamber, and tire chamber connecting pipe, pipeline is directly welded on carcass, is provided with pipe valve on pipeline; Carcass covers on the valve gap of valve body, and fastening by fastening device institute; The valve rod perforation is set at the carcass top, is used for passing valve rod; It is characterized in that: at the bottom of carcass along annular recess A is set on wall, annular recess A is built-in with O shape rubber seal A; Around the valve rod perforation, annular recess B is set, annular recess B is built-in with O shape rubber seal B.
2. non-injection rubber type high-pressure leakage point tape-pressure leakage clogging device according to claim 1 is characterized in that: described annular recess A cross section is rectangle, and its opening is to edge, the end; Annular recess B cross section is rectangle, and its opening is inside.
3. non-injection rubber type high-pressure leakage point tape-pressure leakage clogging device according to claim 1, it is characterized in that: the inside and outside diameter of described annular recess A respectively with the inside and outside equal diameters of O shape rubber seal A, the little 0.4-0.6 mm of diameter of section of the depth ratio O shape rubber seal A of annular recess A; The outer diameter of annular recess B is than the little 0.09-0.11 mm of outer diameter of the O shape rubber seal B that selects; The little 0.14-0.16 mm of diameter of section of the aspect ratio O shape rubber seal B of annular recess B; The inner diameter of the O shape rubber seal B that selects is than the little 0.2-0.3 mm of stem diameter.
4. non-injection rubber type high-pressure leakage point tape-pressure leakage clogging device according to claim 1, it is characterized in that: the inside and outside diameter of described annular recess A respectively with the inside and outside equal diameters of O shape rubber seal A, the little 0.5mm of diameter of section of the depth ratio O shape rubber seal A of annular recess A; The outer diameter of annular recess B is than the little 0.10mm of outer diameter of the O shape rubber seal B that selects, the little 0.15mm of diameter of section of the aspect ratio O shape rubber seal B of annular recess B; The inner diameter of the O shape rubber seal B that selects is than the little 0.3mm of stem diameter.
5. according to claim 1 or 3 or 4 described non-injection rubber type high-pressure leakage point tape-pressure leakage clogging devices, it is characterized in that: described O shape rubber seal A, O shape rubber seal B all select fluorine rubber material heat-resisting, fine corrosion resistance.
6. non-injection rubber type high-pressure leakage point tape-pressure leakage clogging device according to claim 1, it is characterized in that: the structure of described valve body is: be provided with valve gap on valve body, medium channel is set in valve body, the medium channel middle part is communicated with switch cavity, switch cavity top is communicated with vertical valve rod hole, valve rod hole leads to valve gap, the built-in valve rod of valve rod hole, and valve plug is placed in switch cavity; Whether opening of medium channel is by the valve plug of stem lower portion is controlled; Be provided with the valve stem seal groove in valve gap, the built-in seal ring of valve stem seal groove is used for the gap between sealed valve stem and valve rod hole.
7. the installation method of non-injection rubber type high-pressure leakage point tape-pressure leakage clogging device as claimed in claim 1, it is characterized in that: at first, the leak stopping mold is placed on the valve body of leakage, the carcass of leak stopping mold has covered valve gap, open the draining valve draining, the pressure in mold can not be set up; Secondly, bottom plate is placed under valve body, upper mounted plate is placed on the leak stopping mold, upper mounted plate and bottom plate are tightened up the sealing chamber that forms between mold and valve gap by connecting bolt; After mold is compacted, close pipe valve, the pressure in mold reaches the pressure of working medium gradually; At this moment, leak stopping work is eliminated, has been completed in leakage.
CN201310058487.4A 2013-02-25 2013-02-25 Non-glue-injection high-pressure leak point under-pressure plug device Expired - Fee Related CN103115191B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108226396A (en) * 2017-12-29 2018-06-29 合肥通用机械研究院 Down-hole formation misses emergency processing experimental rig
CN110541957A (en) * 2019-06-27 2019-12-06 中海油(福建)应急维修有限责任公司 Be applied to plugging device of liquefied natural gas valve leak hunting department

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2132060Y (en) * 1992-06-23 1993-05-05 罗启昌 Leakage-stopping unit for pipeline with water or steam running in it
CN2594588Y (en) * 2002-12-23 2003-12-24 中国石油天然气股份有限公司乌鲁木齐石化分公司 Device for stopping leakage of special valve
CN2725675Y (en) * 2004-07-09 2005-09-14 中国石油天然气股份有限公司 Pressurized leak chocking clamp used for high temperature high pressure valve
JP2006083906A (en) * 2004-09-15 2006-03-30 Chugoku Electric Power Co Inc:The Method for preventing fluid leak
CN201487473U (en) * 2009-08-28 2010-05-26 宝钢集团新疆八一钢铁有限公司 Pressure leakage stopping device for large-caliber gas pipeline
TWM404919U (en) * 2010-12-16 2011-06-01 wan-rong Gong Leakage stopping device for valve
CN201923545U (en) * 2010-12-29 2011-08-10 淄博职业学院 Pressurized plugging-up sealing component for storage tank
CN102606847A (en) * 2012-03-29 2012-07-25 广西壮族自治区特种设备监督检验院 Flow guiding type pressure leaking stoppage technology
CN102853087A (en) * 2012-07-25 2013-01-02 盐城市中液液压件有限公司 Pressure balancing high-pressure stop valve

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2132060Y (en) * 1992-06-23 1993-05-05 罗启昌 Leakage-stopping unit for pipeline with water or steam running in it
CN2594588Y (en) * 2002-12-23 2003-12-24 中国石油天然气股份有限公司乌鲁木齐石化分公司 Device for stopping leakage of special valve
CN2725675Y (en) * 2004-07-09 2005-09-14 中国石油天然气股份有限公司 Pressurized leak chocking clamp used for high temperature high pressure valve
JP2006083906A (en) * 2004-09-15 2006-03-30 Chugoku Electric Power Co Inc:The Method for preventing fluid leak
CN201487473U (en) * 2009-08-28 2010-05-26 宝钢集团新疆八一钢铁有限公司 Pressure leakage stopping device for large-caliber gas pipeline
TWM404919U (en) * 2010-12-16 2011-06-01 wan-rong Gong Leakage stopping device for valve
CN201923545U (en) * 2010-12-29 2011-08-10 淄博职业学院 Pressurized plugging-up sealing component for storage tank
CN102606847A (en) * 2012-03-29 2012-07-25 广西壮族自治区特种设备监督检验院 Flow guiding type pressure leaking stoppage technology
CN102853087A (en) * 2012-07-25 2013-01-02 盐城市中液液压件有限公司 Pressure balancing high-pressure stop valve

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108226396A (en) * 2017-12-29 2018-06-29 合肥通用机械研究院 Down-hole formation misses emergency processing experimental rig
CN108226396B (en) * 2017-12-29 2019-08-30 合肥通用机械研究院有限公司 Down-hole formation misses emergency processing experimental rig
CN110541957A (en) * 2019-06-27 2019-12-06 中海油(福建)应急维修有限责任公司 Be applied to plugging device of liquefied natural gas valve leak hunting department

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