CN105987241B - A kind of pressure piping joint sealing device - Google Patents

A kind of pressure piping joint sealing device Download PDF

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Publication number
CN105987241B
CN105987241B CN201510052273.5A CN201510052273A CN105987241B CN 105987241 B CN105987241 B CN 105987241B CN 201510052273 A CN201510052273 A CN 201510052273A CN 105987241 B CN105987241 B CN 105987241B
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China
Prior art keywords
tube
fittings
sealing
connector
locking
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CN201510052273.5A
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Chinese (zh)
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CN105987241A (en
Inventor
王树龙
张文海
王强
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China National Petroleum Corp
CNPC Bohai Equipment Manufacturing Co Ltd
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China National Petroleum Corp
CNPC Bohai Equipment Manufacturing Co Ltd
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Priority to CN201510052273.5A priority Critical patent/CN105987241B/en
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Abstract

The invention discloses a kind of pressure piping joint sealing devices, belong to technical field of hydraulic pressure.The pressure piping joint sealing device includes the first connecting tube, the second connecting tube and connector, one end of first connecting tube is internally provided with step, the step surface of first connecting tube is taper, one end of second connecting tube is stretched into inside the first connecting tube, the conical step surface of the tapering point of second connecting tube and the first connecting tube cooperatively forms face sealing, fitting sleeve is outside the second connecting tube, and connector is fixedly connected with the second connecting tube, and connector is fixedly connected with the first connecting tube.The present invention connects the first connecting tube and the second connecting tube by connector, coordinated by the tapering point of the conical step surface inside first connecting tube one end and the second connecting tube, realize the sealing of joint, sealing effect is preferable, it avoids the problem that being connected through a screw thread the insecure problem of sealing under sealing and hyperbaric environment using can not achieve under low temperature environment caused by rubber seal.

Description

A kind of pressure piping joint sealing device
Technical field
The present invention relates to technical field of hydraulic pressure, more particularly to a kind of pressure piping joint sealing device.
Background technology
Hydraulic drive forms required various control loops using Hydraulic Elements, then by several circuit organic assemblings into The transmission of energy, conversion and control are completed for transmission system.In hydraulic drive required element mainly dynamic element, hold Units, control element, auxiliary element etc..Pipeline is a kind of hydraulic pressure auxiliary element.
In hydraulic technique, hydraulic system can be divided into low pressure, middle pressure, high pressure and super-pressure by pressing force size.It is low, In medium voltage network, the sealing at pipe joint is realized by rubber seal, in high pressure or even extra high voltage system, at pipe joint Sealing be connected through a screw thread realization.
In the implementation of the present invention, inventor has found that the prior art has at least the following problems:
The normal use temperature of rubber seal is -60 DEG C~300 DEG C, when the medium conveyed in hydraulic system pipeline is liquid Nitrogen is when cryogenic medias, because the boiling point of cryogenic media is well below -60 DEG C, expansion rate of the rubber seal under the temperature environment It is 0, it is impossible to realize sealing;And in hyperbaric environment, when the pretightning force of threaded connection is less than the pressure of medium in pipeline, pipeline The mutual changing of the relative positions easily occurs for joint, and the medium in pipeline is caused to be revealed, and sealing is unreliable.
Invention content
Sealing function cannot be played at low ambient temperatures in order to solve the rubber seal of the prior art, and in hyperbaric environment The insecure problem of seal with screwed joint, an embodiment of the present invention provides a kind of pressure piping joint sealing devices.The technology Scheme is as follows:
A kind of pressure piping joint sealing device, the pressure piping joint sealing device include the first connecting tube, second Connecting tube and connector, one end of first connecting tube are internally provided with step, and the step surface of first connecting tube is taper, institute The one end for stating the second connecting tube is stretched into inside first connecting tube, and second connecting tube is stretched into inside first connecting tube One end end for taper, the tapering point of second connecting tube and the conical step surface of first connecting tube cooperatively form face Sealing, outside second connecting tube, the connector is fixedly connected the fitting sleeve with second connecting tube, and described is connect Head is fixedly connected with first connecting tube.
Further, the connector includes snap ring and fittings body, and the snap ring, the fittings body are sequentially sleeved in described second Outside connecting tube, the snap ring is connected through a screw thread with second connecting tube, and one end of the fittings body withstands on the snap ring On, the fittings body is connected through a screw thread with first connecting tube, and the thread rotary orientation on the fittings body and the snap ring On thread rotary orientation it is opposite.
Further, the pressure piping joint sealing device further includes locking device, and the locking device is sleeved on described Outside second connecting tube, and one end of the locking device is fixedly connected with second connecting tube, the locking device it is another One end is fixedly connected with the fittings body, by the locking device prevent first connecting tube and second connecting tube it Between relative displacement occurs.
Specifically, the locking device is clamp nut, and one end of the clamp nut is sleeved on outside second connecting tube Portion, the clamp nut are fixedly connected with second connecting tube, and the other end of the clamp nut is sleeved on outside the fittings body Portion, the clamp nut are fixedly connected with the fittings body.
Further, the pressure piping joint sealing device further includes compression ring, and the compression ring is sleeved on described second Outside connecting tube, and the compression ring is between the clamp nut and the fittings body.
Specifically, the clamp nut and the compression ring are made of low temperature resistant stainless steel material.
Specifically, first connecting tube is three-way pipe, and second connecting tube is straight tube.
Specifically, the connector is made of low temperature resistant stainless steel material.
The advantageous effect that technical solution provided in an embodiment of the present invention is brought is:
The present invention connects the first connecting tube and the second connecting tube by connector, passes through the taper inside first connecting tube one end Step surface and the tapering point of the second connecting tube coordinate, and realize the sealing of joint, and sealing effect is preferable, avoid using rubber seal It the problem of can not achieve sealing under low temperature environment caused by circle and sealing is connected through a screw thread under hyperbaric environment insecure asks Topic.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, for For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings Attached drawing.
Fig. 1 is a kind of structure diagram of pressure piping joint sealing device provided in an embodiment of the present invention.
Wherein:
1 first connecting tube,
2 second connecting tubes,
3 connectors, 31 snap rings, 32 fittings bodies,
4 clamp nuts,
5 compression rings.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention Formula is described in further detail.
As shown in Figure 1, an embodiment of the present invention provides a kind of pressure piping joint sealing device, the pressure piping connector Sealing device includes the first connecting tube 1, the second connecting tube 2 and connector 3, and one end of first connecting tube 1 is internally provided with step, The step surface of first connecting tube 1 is taper, and one end of second connecting tube 2 is stretched into inside first connecting tube 1, institute It states the second connecting tube 2 and stretches into one end end inside first connecting tube 1 as taper, the tapering point of second connecting tube 2 Face sealing is cooperatively formed with the conical step surface of first connecting tube 1, the connector 3 is sleeved on outside second connecting tube 2, The connector 3 is fixedly connected with second connecting tube 2, and the connector 3 is fixedly connected with first connecting tube 1.
The operation principle of the present invention:
The present invention is for conveying medium-pressure or high pressure system media, the step processed inside one end of the first connecting tube 1, and Step surface is processed as taper, and the second connecting tube 2 is processed as the cone coordinated with step surface with one end end that the first connecting tube 1 is connected Shape is set inside one end of step in use, one end of taper is set to stretch into the first connecting tube 1 second connecting tube 2, by connecing First 3 make the second connecting tube 2 compress the first connecting tube 1, make 2 end of conical step surface and the second connecting tube in the first connecting tube 1 The conical surface be snuggly mated to together, realize sealing.
The present invention connects the first connecting tube 1 and the second connecting tube 2 by connector 3, inside 1 one end of the first connecting tube The tapering point of conical step surface and the second connecting tube 2 coordinates, and realizes the sealing of joint, and sealing effect is preferable, avoids using rubber The problem of can not achieve sealing under low temperature environment caused by glue sealing ring and be connected through a screw thread under hyperbaric environment sealing it is unreliable The problem of.
As shown in Figure 1, further, the connector 3 includes snap ring 31 and fittings body 32, the snap ring 31, the connector Body 32 is sequentially sleeved in outside second connecting tube 2, and the snap ring 31 is connected through a screw thread with second connecting tube 2, described One end of fittings body 32 is withstood on the snap ring 31, and the fittings body 32 is connected through a screw thread with first connecting tube 1, and institute The thread rotary orientation stated on fittings body 32 is opposite with the thread rotary orientation on the snap ring 31.
In the present embodiment, being coordinated by snap ring 31 and the second connecting tube 2, fittings body 32 is sleeved on outside the second connecting tube 2, 32 and first connecting tube 1 of fittings body coordinates and withstands on snap ring 31, and the thread rotary orientation on snap ring 31 and fittings body 32 is on the contrary, use In the process, the first connecting tube 1 is stretched into on the head of the second connecting tube 2 after first 31 and second connecting tube 2 of snap ring is fixed together Inside one end that step is set, then fittings body 32 is sleeved on outside the second connecting tube 2, by turning fittings body 32, fittings body 32 Snap ring 31 is headed on during coordinating with the first connecting tube 1 and compresses the first connecting tube 1 with the second connecting tube 2, makes the first connection Conical step surface on pipe 1 is fitted close with the tapered end face in the second connecting tube 2, realizes the sealing of joint, and because connect Head body 32 is opposite with the thread rotary orientation on snap ring 31, it is ensured that snap ring 31 will not fluff with the stubborn strength of connector 3.
As shown in Figure 1, further, the pressure piping joint sealing device further includes locking device, the locking dress It puts and is sleeved on outside second connecting tube 2, and one end of the locking device is fixedly connected with second connecting tube 2, it is described The other end of locking device is fixedly connected with the fittings body, and first connecting tube 1 and institute are prevented by the locking device It states and relative displacement occurs between the second connecting tube 2.
In the present embodiment, by connecing locking device in 2 outer cover of the second connecting tube, the first connecting tube 1 and second is prevented Relative displacement occurs between connecting tube 2, so that it is guaranteed that the cone in the conical step surface and the second connecting tube 2 in the first connecting tube 1 Shape end is fitted close always, it is ensured that sealing effect.
As shown in Figure 1, specifically, the locking device is clamp nut 4, and one end of the clamp nut 4 is sleeved on described Outside second connecting tube 2, the clamp nut 4 is fixedly connected with second connecting tube 2, the other end of the clamp nut 4 It is sleeved on outside the fittings body 32, the clamp nut 4 is fixedly connected with the connector 32.
In the present embodiment, clamp nut 4 is the nut with step inner face, by the second connecting tube 2 and fittings body 32 outsides are socketed clamp nuts 4, and external screw thread is equipped in the second connecting tube 2 and fittings body 32, and 4 internal diameter of clamp nut is smaller interior Flank coordinates with the second connecting tube 2, and the larger inner threaded surface of 4 internal diameter of clamp nut and fittings body 32 coordinate, and during work, tightens Clamp nut 4 prevents from relatively moving between the second connecting tube 2 and the first connecting tube 1 by clamp nut 4, it is ensured that sealing Effect.
Certainly, skilled person will appreciate that, locking device can also be and 32 integrally formed ladder cylinder of fittings body, ladder One end inner wall of the cylinder far from fittings body 32 is equipped with internal thread and the second connecting tube 2 and coordinates, simple in structure, during work, by twisting Dynamic fittings body 32, the internal thread during fittings body 32 coordinates with the first connecting tube 1 on locking device are matched with the second connecting tube It closes, realizes locking functions.Locking device can also be that other can be fixedly connected with 32 and second connecting tube 2 of fittings body and simultaneously with the The structure of two connecting tubes, 2 split.
As shown in Figure 1, further, the pressure piping joint sealing device further includes compression ring 5, the compression ring 5 It is sleeved on outside second connecting tube 2, and the compression ring 5 is between the clamp nut 41 and the fittings body 32.
In the present embodiment, by setting compression ring between clamp nut 4 and fittings body 32, pass through compression ring 5 and pressure Tight nut 4 prevents that relative displacement occurs between the first connecting tube 1 and the second connecting tube 2 jointly, it is ensured that sealing effect.
Referring to Fig. 1, specifically, the clamp nut 4 and the compression ring 5 are made of low temperature resistant stainless steel material.
In the present embodiment, clamp nut 4 and compression ring 5 are made of low temperature stainless steel, such as 304 or 316, it is ensured that this hair It is bright to can be suitably used for low temperature environment,
As shown in Figure 1, specifically, first connecting tube 1 is three-way pipe, second connecting tube 2 is straight tube.
In the present embodiment, the first connecting tube 1 is three-way pipe, and the second connecting tube 2 is straight tube, is connected by connector connection second 2 and first connecting tube 1 of take over, pressure or high-pressure system suitable for various.Certainly, skilled person will appreciate that, first connects 1 and second connecting tube 2 of take over can be the Hydraulic Elements of any required connection, such as straight tube, three-way pipe, four-way pipe, when the first company Whens 1 and second connecting tube 2 of take over is three-way pipe, four-way pipe etc., connector 3 is arranged in the Hydraulic Elements such as three-way pipe, four-way pipe One interface.
Referring to Fig. 1, specifically, the connector 3 is made of low temperature resistant stainless steel material.
In the present embodiment, snap ring 31, fittings body 32 are made of low temperature stainless steel so that work at low ambient temperatures of the invention The problems such as work is not in black brittleness transformation.Certainly, skilled person will appreciate that, when the present invention is not needed in low temperature environment During lower work, snap ring 31, fittings body 32 can also be made of ordinary metallic material.
The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.

Claims (1)

1. a kind of pressure piping joint sealing device, which is characterized in that the pressure piping joint sealing device includes first and connects It takes over, the second connecting tube and connector, one end of first connecting tube are internally provided with step, the step surface of first connecting tube For taper, one end of second connecting tube is stretched into inside first connecting tube, and second connecting tube stretches into described first One end end inside connecting tube is taper, the tapering point of second connecting tube and the conical step surface of first connecting tube Face sealing is cooperatively formed, outside second connecting tube, the connector is fixed with second connecting tube to be connected the fitting sleeve It connects, and the connector is fixedly connected with first connecting tube;
The connector includes snap ring and fittings body, and the snap ring, the fittings body are sequentially sleeved in outside second connecting tube, institute It states snap ring to be connected through a screw thread with second connecting tube, one end of the fittings body is withstood on the snap ring, the fittings body It is connected through a screw thread with first connecting tube, and the thread rotary orientation on the fittings body and the thread rotary orientation phase on the snap ring Instead;
First connecting tube is three-way pipe, and second connecting tube is straight tube;
The pressure piping joint sealing device further includes locking device, and the locking device is sleeved on outside second connecting tube Portion, and one end of the locking device is fixedly connected with second connecting tube, the other end of the locking device connects with described Head body is fixedly connected, and prevents that opposite position occurs between first connecting tube and second connecting tube by the locking device It moves;
The locking device is clamp nut, and one end of the clamp nut is sleeved on outside second connecting tube, the compression Nut is fixedly connected with second connecting tube, and the other end of the clamp nut is sleeved on outside the fittings body, the compression Nut is fixedly connected with the fittings body;
The pressure piping joint sealing device further includes compression ring, and the compression ring is sleeved on outside second connecting tube, and The compression ring is between the clamp nut and the fittings body;
The clamp nut and the compression ring are made of low temperature resistant stainless steel material;
The connector is made of low temperature resistant stainless steel material.
CN201510052273.5A 2015-01-30 2015-01-30 A kind of pressure piping joint sealing device Active CN105987241B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510052273.5A CN105987241B (en) 2015-01-30 2015-01-30 A kind of pressure piping joint sealing device

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Application Number Priority Date Filing Date Title
CN201510052273.5A CN105987241B (en) 2015-01-30 2015-01-30 A kind of pressure piping joint sealing device

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CN105987241B true CN105987241B (en) 2018-07-10

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111236948B (en) * 2020-01-13 2021-09-28 中国水利水电第七工程局有限公司 High-pressure branch pipe excavation method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2284240A (en) * 1993-11-27 1995-05-31 Stewart Buchanan Gauges Limite Connection Assembly
CN2446362Y (en) * 2000-07-27 2001-09-05 贵州凯撒铝业有限公司 End sealed sleeving type locking tube joint
CN201297461Y (en) * 2008-11-25 2009-08-26 荆州恒隆汽车零部件制造有限公司 Movable joint of pipeline
CN202017836U (en) * 2011-04-19 2011-10-26 杨伟津 Stainless steel hard-seal pipe connector
CN202972264U (en) * 2012-12-18 2013-06-05 郑州人造金刚石及制品工程技术研究中心有限公司 Combined type anti-loosing pipe joint sealing structure
CN204533897U (en) * 2015-01-30 2015-08-05 中国石油天然气集团公司 A kind of pressure piping joint sealing device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8196967B2 (en) * 2009-02-04 2012-06-12 Robert Bosch Gmbh Improvements to high pressure fuel fittings
WO2013166666A1 (en) * 2012-05-09 2013-11-14 Ge Wenyu Slideway-type locking pipe fitting

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2284240A (en) * 1993-11-27 1995-05-31 Stewart Buchanan Gauges Limite Connection Assembly
CN2446362Y (en) * 2000-07-27 2001-09-05 贵州凯撒铝业有限公司 End sealed sleeving type locking tube joint
CN201297461Y (en) * 2008-11-25 2009-08-26 荆州恒隆汽车零部件制造有限公司 Movable joint of pipeline
CN202017836U (en) * 2011-04-19 2011-10-26 杨伟津 Stainless steel hard-seal pipe connector
CN202972264U (en) * 2012-12-18 2013-06-05 郑州人造金刚石及制品工程技术研究中心有限公司 Combined type anti-loosing pipe joint sealing structure
CN204533897U (en) * 2015-01-30 2015-08-05 中国石油天然气集团公司 A kind of pressure piping joint sealing device

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