CN108361464B - Pressure balance type expansion joint based on end face sliding seal compensation technology - Google Patents
Pressure balance type expansion joint based on end face sliding seal compensation technology Download PDFInfo
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- CN108361464B CN108361464B CN201810008621.2A CN201810008621A CN108361464B CN 108361464 B CN108361464 B CN 108361464B CN 201810008621 A CN201810008621 A CN 201810008621A CN 108361464 B CN108361464 B CN 108361464B
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- expansion joint
- sliding seal
- face sliding
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L51/00—Expansion-compensation arrangements for pipe-lines
- F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
- F16L51/03—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube comprising two or more bellows
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Abstract
A pressure balance type expansion joint based on an end face sliding seal compensation technology comprises an inlet end pipe, a working corrugated pipe I, a balance corrugated pipe, a working corrugated pipe II, an outlet end pipe and a plurality of groups of pull rod structures which are connected in sequence, wherein each pull rod structure comprises an end plate I fixedly sleeved on the inlet end pipe, a middle pipe assembly I and a middle pipe assembly II arranged on two sides of the balance corrugated pipe, an end plate II fixedly sleeved on the outlet end pipe and a pull rod, an end face sliding seal compensation structure is arranged on the outlet end pipe between the end plate II and the working corrugated pipe II, the end face sliding seal compensation structure comprises an end flange A fixedly sleeved on the outlet end pipe A, an end flange B fixedly sleeved on the outlet end pipe B, a sliding gasket, a flange sealing element, a flange bolt and a flange nut, and the technology improves the transverse displacement compensation capacity of the pressure balance type expansion joint, meanwhile, the stress of the end flange used for end face sliding sealing is reduced, the flange is thinned, and the cost of the flange is reduced.
Description
Technical Field
The invention belongs to the technical field of sealing, and particularly relates to a pressure balance type expansion joint based on an end face sliding seal compensation technology.
Background
The general technical conditions of the expansion joint standard GB/T12777 metal corrugated pipe expansion joint in China are defined as the following: the expansion joint is composed of two working corrugated pipes positioned at two ends, a balance corrugated pipe positioned in the middle, a pull rod, an end plate and other structural members, and is mainly used for absorbing axial displacement and balancing pressure thrust of the corrugated pipes. In order to increase the lateral displacement compensation capability of the straight pipe pressure balance type expansion joint, the CN201520791414.0 straight pipe pressure balance type compensator is designed into a compound corrugated pipe for one of the working corrugated pipes, and the compound corrugated pipe can increase the lateral displacement compensation capability by controlling the effective length. CN200420074568.X discloses a sliding seal type expansion joint, which realizes the transverse displacement compensation of a pipeline, reduces the transverse displacement counter force, and indicates that the sliding seal structure can be used on a single type expansion joint for absorbing transverse displacement and a straight pipe pressure balance type expansion joint.
For a piping system provided with a non-constraint expansion joint connected by a flange, the stress state of the flange is changed, in order to enable the expansion joint to freely stretch and retract along with the expansion and contraction of a pipeline and not to be stretched by pressure thrust, a main fixed support is usually arranged at an elbow, so that the main fixed support bears the pressure thrust of the pipeline and reduces the stress of a flange bolt, at the moment, an end flange and a sliding flange of a sliding seal type expansion joint do not need to bear the pressure thrust of the pipeline, and therefore strength and rigidity check of the end flange and the sliding flange are easy to pass. The straight pipe pressure balance type expansion joint belongs to a constraint type expansion joint, when a sealing mode of a sliding sealing type expansion joint is directly applied to the straight pipe pressure balance type expansion joint, the connection of an end flange and a sliding flange at the moment belongs to a typical flange connection structure, because the constraint type expansion joint is installed on a pipeline without a fixed support, when the direction of the pipeline changes, axial thrust force caused by pressure acting on an elbow needs to be borne by flange bolts, the bolts also need to provide sealing pretightening force of an O-shaped sealing ring, the stress of the end flange of the structure is harsh, and the flange needs to be designed to be thick to meet the sliding and sealing requirements, so that the sliding sealing structure has the defect of being uneconomical when being applied to the straight pipe pressure balance type expansion joint.
Disclosure of Invention
In order to solve the technical problems, the invention provides a pressure balance type expansion joint based on an end face sliding seal compensation technology, which improves the transverse displacement compensation capability of the pressure balance type expansion joint, reduces the stress of an end flange used for end face sliding seal, realizes the thinning design of the flange and reduces the cost of the flange.
In order to realize the technical purpose, the adopted technical scheme is as follows: a pressure balance type expansion joint based on an end face sliding seal compensation technology comprises an inlet end pipe, a working corrugated pipe I, a balance corrugated pipe, a working corrugated pipe II and an outlet end pipe which are connected in sequence, and a plurality of groups of pull rod structures arranged around the outer circumference of the expansion joint, wherein each pull rod structure consists of an end plate I fixedly sleeved on the inlet end pipe, a middle pipe assembly I and a middle pipe assembly II arranged on two sides of the balance corrugated pipe, and an end plate II and a pull rod fixedly sleeved on the outlet end pipe, the end plate I is rigidly connected with the middle pipe assembly II through the pull rod, the end plate II is rigidly connected with the middle pipe assembly I through the pull rod, an end face sliding seal compensation structure is arranged on the outlet end pipe between the end plate II and the working corrugated pipe II, the outlet end pipe at the end face sliding seal compensation structure is divided into an outlet end pipe A and an outlet end pipe B which are equal in diameter and are mutually, the end face sliding seal compensation structure is composed of an end flange A fixedly sleeved on an outlet end pipe A, an end flange B fixedly sleeved on the outlet end pipe B, a sliding gasket, a flange sealing element, flange bolts and flange nuts, wherein the flange sealing element is clamped between the end flange A and the end flange B, a plurality of bolt holes A matched with the flange bolts are formed in the circumferential direction of the end flange A, bolt holes B are formed in the circumferential direction of the end flange B corresponding to the bolt holes A, the hole diameter of each bolt hole B is larger than the diameter of each flange bolt, each flange bolt sequentially penetrates through the bolt holes A, the bolt holes B and the sliding gasket, and the end flange A and the end flange B are connected in a sealing mode through the flange nuts.
The end flange B and the end plate II are the same component.
A sliding antifriction gasket is also clamped between the flange nut and the end flange B.
The flange sealing element is a flange gasket or an O-shaped sealing ring.
The invention has the beneficial effects that:
1. the end face sliding sealing technology is used, the transverse displacement compensation capacity of the straight pipe pressure balance type expansion joint is improved, the transverse compensation gap △ is reserved on the end flange B, the end flange A, the end flange B and the flange bolts do not bear blind plate force in a pipeline, the stress of the end flange A is improved, and the end flange A and the end flange B can be designed to be thinned.
2. And the end plate II is used as an end flange B, so that the axial size of the expansion joint is reduced, and the installation space is saved.
Drawings
FIG. 1 is a schematic diagram of a prior art structure;
FIG. 2 is a schematic structural diagram of embodiment 1 of the present invention;
FIG. 3 is a schematic structural diagram of an embodiment 2 of the present invention;
FIG. 4 is a schematic view of a first embodiment of the sliding face seal compensation configuration of the present invention;
FIG. 5 is a second structural schematic view of the end face sliding seal compensation structure of the present invention;
in the figure: 1. the anti-friction device comprises an inlet end pipe, 2, working corrugated pipes I and 3, a balance corrugated pipe, 4, working corrugated pipes II and 5, an outlet end pipe, 5-1, outlet end pipes A and 5-2, outlet end pipes B and 6, end plates I and 7, a pull rod, 8, middle pipe assemblies I and 9, middle pipe assemblies II and 10, end flanges A and 11, end flanges B and 12, end plates II and 13, sliding gaskets, 14, flange bolts, 15, flange nuts, 16, bolt holes A and 17, bolt holes B and 18, flange gaskets, 19, O-shaped sealing rings, 20 and sliding anti-friction gaskets.
Detailed Description
A pressure balance type expansion joint based on an end face sliding seal compensation technology comprises an inlet end pipe 1, a working corrugated pipe I2, a balance corrugated pipe 3, a working corrugated pipe II 4, an outlet end pipe 5 and a plurality of groups of pull rod structures arranged around the outer circumference of the expansion joint, wherein the pull rod structures are formed by an end plate I6 fixedly sleeved on the inlet end pipe 1, an intermediate pipe assembly I8 and an intermediate pipe assembly II 9 arranged on two sides of the balance corrugated pipe, an end plate II 12 and a pull rod 7 fixedly sleeved on the outlet end pipe 5, the end plate I6 is rigidly connected with the intermediate pipe assembly II 9 through the pull rod 7, the end plate II 12 is rigidly connected with the intermediate pipe assembly I8 through the pull rod 7, the expansion joint is a conventional pressure balance type expansion joint, an end face sliding seal compensation structure is arranged on the outlet end pipe 5 between the end plate II 12 and the working corrugated pipe II 4, the outlet end pipe 5 at the end face sliding seal compensation structure is divided into an outlet end pipe A5-1 and an outlet end pipe B5-2 which are equal in diameter and independent from each other, the outlet end pipe A5-1 and the outlet end pipe B5-2 through bolts, a bolt hole equivalent to a bolt hole of a flange 99-9, a bolt hole of.
And a sliding antifriction pad 20 is clamped between the flange nut 15 and the end flange B11.
Fig. 4 and 5 show the flange sealing method used in the face sliding seal compensation technology, and the flange sealing element is a flange gasket 18 or an O-ring 19.
Example 1
A pressure balance type expansion joint adopting end face sliding seal compensation technology is shown in figure 1, the main structure of the pressure balance type expansion joint is consistent with that of a straight pipe pressure balance type expansion joint in GB/T12777, an end face sliding seal compensation structure is added, a pull rod is provided to be connected with an end plate I and an end plate II according to the drawing, as shown in figure 2, improvement is carried out on the basis of figure 1, an end plate II 12 and an outlet end pipe 5 form an external rigid connection structure through a pull rod 7 and an intermediate pipe assembly I8, a new end flange B11 is added to the outlet end pipe 5 to serve as a sliding flange, an end flange A10, the sliding flange, a flange bolt 14, a flange gasket 18, a sliding antifriction gasket 20, a sliding gasket 13 and a flange nut 15 form an end face sliding seal compensation structure, the end face sliding seal compensation structure is located in the external rigid connection structure, a transverse compensation gap △ is reserved in a bolt hole B on the sliding flange, when a pipeline connected by the expansion joint has transverse displacement, the sliding flange A10 at the opposite end face slides radially, the reserved transverse compensation gap △ meets the requirements of radial sliding compensation structure, the sliding flange A, the sliding friction resistance is reduced, the sliding end face sliding flange A sliding compensation structure, the sliding flange A sliding flange is installed in the sliding end face sliding flange structure, the sliding flange structure, the sliding flange sliding.
Example 2
In the pressure balance type expansion joint ii using the end face sliding seal compensation technique shown in fig. 3, the end plate ii of the pressure balance type expansion joint shown in fig. 3 is used as the end flange B, so that the installation space can be shortened, the components can be saved, and other structures are the same as those in embodiment 1.
Claims (3)
1. The utility model provides a pressure balance type expansion joint based on end face sliding seal compensation technique, expansion joint are including the import end pipe (1), work bellows I (2), balanced bellows (3), work bellows II (4) and export end pipe (5) that connect gradually to and the multiunit pull rod structure that sets up around the outside circumference of expansion joint, pull rod structure constitute by fixed end plate I (6) of establishing on import end pipe (1), set up in intermediate tube subassembly I (8) and intermediate tube subassembly II (9) of balanced bellows both sides, fixed end plate II (12) and pull rod (7) of establishing on export end pipe (5), end plate I (6) are through pull rod (7) and intermediate tube subassembly II (9) rigid connection, end plate II (12) are through pull rod (7) and intermediate tube subassembly I (8) rigid connection, its characterized in that: an end face sliding seal compensation structure is arranged on an outlet end pipe (5) between an end plate II (12) and a working corrugated pipe II (4), the outlet end pipe (5) at the end face sliding seal compensation structure is divided into an outlet end pipe A (5-1) and an outlet end pipe B (5-2) which are equal in diameter and are mutually independent, the end face sliding seal compensation structure is composed of an end flange A (10) fixedly sleeved on the outlet end pipe A (5-1), an end flange B (11) fixedly sleeved on the outlet end pipe B (5-2), a sliding gasket (13), a flange sealing piece, a flange bolt (14) and a flange nut (15), the end flange B (11) and the end plate II (12) are the same part, the flange sealing piece is clamped between the end flange A (10) and the end flange B (11), a plurality of bolt holes A (16) matched with the flange bolt (14) are arranged in the circumferential direction of the end flange A (10), the end flange is characterized in that bolt holes B (17) are formed in the circumferential direction of the end flange B (11) corresponding to the bolt holes A (16), the hole diameter of each bolt hole B (17) is larger than the diameter of each flange bolt (14), the flange bolts (14) sequentially penetrate through the bolt holes A (16), the bolt holes B (17) and a sliding gasket, and the end flange A (10) and the end flange B (11) are connected in a sealing mode through flange nuts (15).
2. The pressure balance type expansion joint based on the end face sliding seal compensation technology as claimed in claim 1, wherein: and a sliding antifriction gasket (20) is clamped between the flange nut (15) and the end flange B (11).
3. The pressure balance type expansion joint based on the end face sliding seal compensation technology as claimed in claim 1, wherein: the flange sealing element is a flange gasket (18) or an O-shaped sealing ring (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810008621.2A CN108361464B (en) | 2018-01-04 | 2018-01-04 | Pressure balance type expansion joint based on end face sliding seal compensation technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810008621.2A CN108361464B (en) | 2018-01-04 | 2018-01-04 | Pressure balance type expansion joint based on end face sliding seal compensation technology |
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| CN108361464A CN108361464A (en) | 2018-08-03 |
| CN108361464B true CN108361464B (en) | 2020-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109681712A (en) * | 2019-01-28 | 2019-04-26 | 秦皇岛市泰德管业科技有限公司 | A kind of pressure self-balancing type expansion joint |
| CN111503403B (en) * | 2020-04-03 | 2024-04-19 | 中船双瑞(洛阳)特种装备股份有限公司 | Constrained bellows expansion joint capable of compensating axial displacement |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29603292U1 (en) * | 1996-02-23 | 1996-06-13 | Schwerionenforsch Gmbh | Flange coupling for connecting vacuum containers |
| CN2725688Y (en) * | 2004-08-31 | 2005-09-14 | 中国船舶重工集团公司第七二五研究所 | Sliding sealed expansion joint |
| KR101047341B1 (en) * | 2010-11-15 | 2011-07-07 | 주식회사 동우 이앤씨 건축사사무소 | Pipe connector |
| CN103398261A (en) * | 2013-08-05 | 2013-11-20 | 洛阳双瑞特种装备有限公司 | Internal pressure type straight pipe pressure balance type expansion joint capable of compensating lateral displacement |
-
2018
- 2018-01-04 CN CN201810008621.2A patent/CN108361464B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29603292U1 (en) * | 1996-02-23 | 1996-06-13 | Schwerionenforsch Gmbh | Flange coupling for connecting vacuum containers |
| CN2725688Y (en) * | 2004-08-31 | 2005-09-14 | 中国船舶重工集团公司第七二五研究所 | Sliding sealed expansion joint |
| KR101047341B1 (en) * | 2010-11-15 | 2011-07-07 | 주식회사 동우 이앤씨 건축사사무소 | Pipe connector |
| CN103398261A (en) * | 2013-08-05 | 2013-11-20 | 洛阳双瑞特种装备有限公司 | Internal pressure type straight pipe pressure balance type expansion joint capable of compensating lateral displacement |
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| CN108361464A (en) | 2018-08-03 |
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Address after: No.88, Binhe North Road, hi tech Zone, Luoyang City, Henan Province Patentee after: CSSC Shuangrui (Luoyang) special equipment Co.,Ltd. Address before: No.88, Binhe North Road, hi tech Zone, Luoyang City, Henan Province Patentee before: LUOYANG SUNRUI SPECIAL EQUIPMENT Co.,Ltd. |
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