CN102878381A - Maintenance-free external-pressing direct buried expansion joint - Google Patents

Maintenance-free external-pressing direct buried expansion joint Download PDF

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Publication number
CN102878381A
CN102878381A CN2012103800870A CN201210380087A CN102878381A CN 102878381 A CN102878381 A CN 102878381A CN 2012103800870 A CN2012103800870 A CN 2012103800870A CN 201210380087 A CN201210380087 A CN 201210380087A CN 102878381 A CN102878381 A CN 102878381A
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CN
China
Prior art keywords
guide
plate
pressing plate
bellows
expansion joint
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2012103800870A
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Chinese (zh)
Inventor
周雄伟
刘向红
吉慧萍
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JIANGSU HENGFENG BELLOWS CO Ltd
Original Assignee
JIANGSU HENGFENG BELLOWS CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JIANGSU HENGFENG BELLOWS CO Ltd filed Critical JIANGSU HENGFENG BELLOWS CO Ltd
Priority to CN2012103800870A priority Critical patent/CN102878381A/en
Publication of CN102878381A publication Critical patent/CN102878381A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a maintenance-free external-pressing direct buried expansion joint. The joint comprises an inlet tube, a guide cylinder, an outer sheath, a bellows and an outlet tube, wherein the inlet tube is connected with the guide cylinder and connected with the outer sheath through an annular plate; the bellows is connected with the outer sheath and the outlet tube, and one end of the bellows is connected with a guide plate through an end ring; the guide plate is connected with the outlet tube; the other end of the bellows is connected with the outer sheath through an end plate which is connected with a guide ring; a seal ring is arranged in a seal cavity formed by the guide ring and the outlet tube; and a platen I and the end plate are connected and press the seal ring tightly. The bellows and a double seal structure are adopted for the joint, therefore even if the bellows leaks due to fatigue, the double seal structure of the expansion joint can block media effectively and enable the expansion joint not to leak; gland packing is fed through a guide nozzle, reliable seal and normal use of the expansion joint can be guaranteed for a long time, and the joint is free of maintenance; and the expansion joint is not easy to leak, long in service life, low in maintenance cost and safe and reliable in operation.

Description

Non-maintaining external pressure direct built-in expansion joint
Technical field
The present invention relates to the pipeline extension expansion compensation device, especially a kind of non-maintaining external pressure direct built-in expansion joint that adopts bellows and double seal protection structure.
Background technique
At present, existing heat supply pipeline all needs segmentation that some expansion joints for the compensation pipeline extension are installed, and particularly is embedded in underground length for delivery of high temperature, high-pressure medium apart from heat supply pipeline, and the wall thickness of expansion joint is large, intensity is higher.In the using process, because the extending amount that heat supply pipeline produces is larger, the bellows wave number is more, therefore the bellows of expansion joint needs periodic maintenance or changes expansion joint easily because local leakage appears in fatigue, causes the working life of expansion joint shorter, the workload of safeguarding and changing is large, and cost is higher.
Summary of the invention
For the deficiency of above existing expansion joint, the purpose of this invention is to provide a kind of difficult leakage, long service life, non-maintaining external pressure direct built-in expansion joint in the using process.
The objective of the invention is by realizing by the following technical solutions:
Non-maintaining external pressure direct built-in expansion joint, comprise entrance sleeve, guide shell, oversheath, bellows and discharge connection, the internal surface of described entrance sleeve is connected with guide shell, the outer surface of entrance sleeve is fixedly connected with oversheath by ring flat-plate, described bellows-sheathed is located between oversheath and the discharge connection and is connected with discharge connection with oversheath respectively, described guide shell extend in the discharge connection, one end of described bellows is fixedly connected with guide plate by end ring, guide plate is fixedly connected with the end of discharge connection near entrance sleeve, the other end of described bellows is fixedly connected with the internal surface of oversheath by end plate, and described end plate is connected with sealing packing device;
Described sealing packing device comprises guide ring, seal ring, pressing plate I, described guide ring is fixedly connected with end plate, described seal ring is located in the Seal cage that consists of between guide ring and the discharge connection outer surface, described pressing plate I is provided with bulge loop, and the pressing plate I is connected with end plate by bolt and makes described bulge loop press seal circle.
As the preferred technical solution of the present invention, described sealing packing device also comprises pressing plate II, stuffing box packing and guide mouth, described pressing plate II is fixedly connected with the pressing plate I, be provided with packing cavity between pressing plate II and the pressing plate I, be provided with stuffing box packing in the packing cavity, described guide mouth is located on the pressing plate II and with packing cavity and is communicated with.
As the preferred technical solution of the present invention, described stuffing box packing is can pouring-in filler.
As the preferred technical solution of the present invention, described guide mouth is provided with sealed cap.
As the preferred technical solution of the present invention, described pressing plate I is connected and fixed by the outer surface of fixed plate and described discharge connection.
The invention has the beneficial effects as follows: with respect to prior art; expansion joint of the present invention adopts bellows and double seal protection structure; even the bellows of expansion joint local leakage occurs because of fatigue in the using process; the double sealing structure of expansion joint can effectively stop medium, makes expansion joint can not occur on the whole leaking.The present invention can also inject stuffing box packing by the guide mouth, strengthens the sealability of expansion joint, keeps for a long time reliable sealing and normal use of expansion joint, thereby realizes non-maintaining purpose.It is low, safe and reliable that the present invention is difficult for leakage, long service life, maintenance cost.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing and specific embodiment:
Fig. 1 is structural representation of the present invention;
Fig. 2 is the partial structurtes enlarged diagram at A place among Fig. 1.
Among the figure: 1, entrance sleeve, 2, guide shell, 3, ring flat-plate, 4, guide plate, 5, end ring, 6, bellows, 7, oversheath, 8, seal ring, 9, end plate, 10, the pressing plate I, 11, bolt, 13, discharge connection, 14, guide ring, 15, the pressing plate II, 16, the guide mouth, 17, stuffing box packing.
Embodiment
As depicted in figs. 1 and 2, non-maintaining external pressure direct built-in expansion joint, comprise entrance sleeve 1, guide shell 2, oversheath 7, bellows 6 and discharge connection 13, the internal surface of described entrance sleeve 1 is connected with guide shell 2, the outer surface of entrance sleeve 1 is fixedly connected with oversheath 7 by ring flat-plate 3, bellows 6 is set between oversheath 7 and the discharge connection 13 and is connected with discharge connection with oversheath 7 respectively and is connected, guide shell 2 extend in the discharge connection 13, one end of bellows 6 is fixedly connected with guide plate 4 by end ring 5, guide plate 4 is fixedly connected with the end of discharge connection 13 near entrance sleeve 1, the other end of bellows 6 is fixedly connected with by the internal surface of end plate 9 with oversheath 7, and end plate 9 is connected with sealing packing device.
Described sealing packing device comprises guide ring 14, seal ring 8, pressing plate I 10, guide ring 14 is fixedly connected with end plate 9, seal ring 8 is located in the Seal cage that consists of between guide ring 14 and discharge connection 13 outer surfaces, pressing plate I 10 is provided with bulge loop, and pressing plate I 10 is connected with end plate 9 by bolt 11 and makes described bulge loop press seal circle 8.
In the present embodiment, described sealing packing device also comprises pressing plate II 15, stuffing box packing 17 and guide mouth 16, pressing plate II 15 is fixedly connected with pressing plate I 10, be provided with packing cavity between pressing plate II 15 and the pressing plate I 10, be provided with stuffing box packing 17 in the packing cavity, described guide mouth 16 is located on the pressing plate II 15 and with packing cavity and is communicated with; The described stuffing box packing 17 of present embodiment is can pouring-in filler, and guide mouth 16 is provided with sealed cap.Described pressing plate I 10 is connected and fixed by the outer surface of fixed plate 12 with discharge connection 13.

Claims (5)

1. non-maintaining external pressure direct built-in expansion joint, comprise entrance sleeve (1), guide shell (2), oversheath (7), bellows (6) and discharge connection (13), the internal surface of described entrance sleeve (1) is connected with guide shell (2), the outer surface of entrance sleeve (1) is fixedly connected with oversheath (7) by ring flat-plate (3), described bellows (6) is set between oversheath (7) and the discharge connection (13) and is connected 13 with oversheath (7) with discharge connection respectively) be connected, described guide shell (2) extend in the discharge connection (13), it is characterized in that: an end of described bellows (6) is fixedly connected with guide plate (4) by end ring (5), guide plate (4) is fixedly connected with the end of discharge connection (13) near entrance sleeve, the other end of described bellows (6) is fixedly connected with by the internal surface of end plate (9) with oversheath (7), and described end plate (9) is connected with sealing packing device;
Described sealing packing device comprises guide ring (14), seal ring (8), pressing plate I (10), described guide ring (14) is fixedly connected with end plate (9), described seal ring (8) is located in the Seal cage that consists of between guide ring (14) and discharge connection (13) outer surface, described pressing plate I (10) is provided with bulge loop, and pressing plate I (10) is connected with end plate (9) by bolt (11) and makes described bulge loop press seal circle (8).
2. non-maintaining external pressure direct built-in expansion joint according to claim 1, it is characterized in that: described sealing packing device also comprises pressing plate II (15), stuffing box packing (17) and guide mouth (16), described pressing plate II (15) is fixedly connected with pressing plate I (10), be provided with packing cavity between pressing plate II (15) and the pressing plate I (10), be provided with stuffing box packing (17) in the packing cavity, described guide mouth (16) is located at pressing plate II (15) and upward and with packing cavity is communicated with.
3. non-maintaining external pressure direct built-in expansion joint according to claim 2, it is characterized in that: described stuffing box packing (17) is can pouring-in filler.
4. according to claim 2 or 3 described non-maintaining external pressure direct built-in expansion joints, it is characterized in that: described guide mouth (16) is provided with sealed cap.
5. non-maintaining external pressure direct built-in expansion joint according to claim 1 and 2 is characterized in that: described pressing plate I (10) is connected and fixed by the outer surface of fixed plate (12) with described discharge connection (13).
CN2012103800870A 2012-10-08 2012-10-08 Maintenance-free external-pressing direct buried expansion joint Pending CN102878381A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012103800870A CN102878381A (en) 2012-10-08 2012-10-08 Maintenance-free external-pressing direct buried expansion joint

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012103800870A CN102878381A (en) 2012-10-08 2012-10-08 Maintenance-free external-pressing direct buried expansion joint

Publications (1)

Publication Number Publication Date
CN102878381A true CN102878381A (en) 2013-01-16

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CN2012103800870A Pending CN102878381A (en) 2012-10-08 2012-10-08 Maintenance-free external-pressing direct buried expansion joint

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103215947A (en) * 2013-02-06 2013-07-24 徐州市城市轨道交通有限责任公司 Novel freezing pipe
CN107345610A (en) * 2016-05-08 2017-11-14 江苏贝特管件有限公司 Anti-corrosion direct-burried external-compression type expansion bellow
CN107781563A (en) * 2016-08-31 2018-03-09 吉慧萍 The non-maintaining self- steering sealed expansion joint of external pressure straight pipe pressure-equalizing

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3701635A (en) * 1969-11-18 1972-10-31 Uhde Gmbh Friedrich Pipe connector for the interior of reaction vessels
CN2192788Y (en) * 1994-05-28 1995-03-22 田震 Pipe-compensater with quick sealing function
CN201326864Y (en) * 2008-12-05 2009-10-14 北京兴达波纹管有限公司 Direct-buried external pressure compensator
CN101608723A (en) * 2008-06-21 2009-12-23 洛阳双瑞特种装备有限公司 A kind of non-maintaining sleeve compensator with double sealing structure
CN202132636U (en) * 2011-06-17 2012-02-01 江苏华电管道设备有限公司 Dual-seal filling type rotary compensator
CN202901675U (en) * 2012-10-08 2013-04-24 江苏恒丰波纹管有限公司 Maintenance-free external pressure directly-buried expansion joint

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3701635A (en) * 1969-11-18 1972-10-31 Uhde Gmbh Friedrich Pipe connector for the interior of reaction vessels
CN2192788Y (en) * 1994-05-28 1995-03-22 田震 Pipe-compensater with quick sealing function
CN101608723A (en) * 2008-06-21 2009-12-23 洛阳双瑞特种装备有限公司 A kind of non-maintaining sleeve compensator with double sealing structure
CN201326864Y (en) * 2008-12-05 2009-10-14 北京兴达波纹管有限公司 Direct-buried external pressure compensator
CN202132636U (en) * 2011-06-17 2012-02-01 江苏华电管道设备有限公司 Dual-seal filling type rotary compensator
CN202901675U (en) * 2012-10-08 2013-04-24 江苏恒丰波纹管有限公司 Maintenance-free external pressure directly-buried expansion joint

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103215947A (en) * 2013-02-06 2013-07-24 徐州市城市轨道交通有限责任公司 Novel freezing pipe
CN107345610A (en) * 2016-05-08 2017-11-14 江苏贝特管件有限公司 Anti-corrosion direct-burried external-compression type expansion bellow
CN107781563A (en) * 2016-08-31 2018-03-09 吉慧萍 The non-maintaining self- steering sealed expansion joint of external pressure straight pipe pressure-equalizing

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Application publication date: 20130116