CN103939703A - Coaxial two-way external pressure type anti-twisting expansion joint - Google Patents
Coaxial two-way external pressure type anti-twisting expansion joint Download PDFInfo
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- CN103939703A CN103939703A CN201410100318.7A CN201410100318A CN103939703A CN 103939703 A CN103939703 A CN 103939703A CN 201410100318 A CN201410100318 A CN 201410100318A CN 103939703 A CN103939703 A CN 103939703A
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- coaxial
- expansion joint
- outer tube
- joints
- spigot
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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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joints Allowing Movement (AREA)
Abstract
The invention discloses a coaxial two-way external pressure type anti-twisting expansion joint. The coaxial two-way external pressure type anti-twisting expansion joint is composed of inner tubes, outer joints, corrugated tubes, inner joints, a key, an outer tube and pins jointly. The inner wall of the middle section of the outer tube is fixedly connected with the key which is arranged in the axial direction. The inner tubes extend into an inner cavity of the outer tube from the two ends of the outer tube respectively. The inner joints, the corrugated tubes and the outer joints are arranged on the overlapping sections between the inner tubes and the outer tube in a sleeved mode to form axial compensation assemblies which are independent of one another, wherein the inner joints, the corrugated tubes and the outer joints are sequentially connected in a sealed mode. The outer wall of each inner joint is provided with an axial open slot matched with the key. The inner joints and the key move relatively to form an axial compensation assembly displacement track structure. Orifices in the two ends of the outer tube are in sealing connection with the matched outer joints respectively to form two symmetrically-arranged axial compensation assembly integrated structures. The coaxial two-way external pressure type anti-twisting expansion joint is simple in structure, high in integration level and capable of conducting independent one-way compensation and synchronous two-way compensation. Built-in coaxial displacement tracks are coaxial, do not influence axial compensation and have an anti-twisting function, so it can be guaranteed that the corrugated tubes only conduct axial displacement movement and the service life of the expansion joint can be prolonged.
Description
Technical field
The present invention relates to a kind of pipe safety device, specifically, the present invention relates to a kind of expansion joint for heat supply pipeline, particularly the antitorque expansion joint of a kind of coaxial two-way external compression type.
Background technique
Urban heating network and the reason of industrial pipe network because expanding with heat and contract with cold, produce while making pipe network operation and have destructive internal stress and corresponding displacement, for the security needs of pipe network configure expansion joint at interdependent node, to absorb or compensating axial thrust and displacement.In engineering, generally apply internal pressure type axial expansion joint, the expansion joint structure of the type is simple, and compensation ability is strong, cheap, can reach the compensation object of expection.But prior art products is the expansion joint of Pipelines with Single Direction Compensation structure, only can do the compensation of a direction, uses and there is narrow limitation.Pipeline crisscross in reality pipe network is because of prestowage device location difference, load difference, certainly lead to the end thrust that is subject to both direction in end thrust or the displacement of non-equivalence and different direction, particularly same pipeline, two unidirectional expansion joints that compensation direction is contrary must be installed.In engineering, there is not technology barrier although two unidirectional expansion joints are installed at the same Nodes of pipeline.But two unidirectional expansion joints must tie up the limited position of node, this structure, except increasing linkage structure, also strengthens supporting cost.In addition, between two fixed supports of standard strict regulations, only allow to install 1 expansion joint.The rotary freedom of prior art products does not limit, and the pipeline that bears different direction axial force exists and reverses tendency, reverses and easily causes bellows fatigue damage frequently.
Summary of the invention
The present invention can not meet the requirement of heating network bidirectional compensating mainly for prior art products, proposes a kind of antitorque expansion joint of coaxial two-way external compression type of integral structure.This is simple and reasonable for structure, compact, and nose balance is flexible.
The present invention is achieved through the following technical solutions technical goal.
The antitorque expansion joint of coaxial two-way external compression type, it is made up of jointly inner tube, socket, bellows, spigot, key bar, outer tube and pin.Described outer tube is circle straight tube, and outer tube stage casing inner tubal wall is fixedly connected with the key bar of axial installation.Described inner tube stretches into outer tube bore from two ends respectively, on superposition section outer wall of inner tube, by the interior suit of order outward be tightly connected successively spigot, bellows and socket, the inner aperture of inner tube is tightly connected into separate nose balance assembly with spigot endoporus.Its improvements are: described spigot outer wall is provided with the shaft orientation opening groove coordinating with key bar, and both relative movement form nose balance assembly displacement rails structure.Aperture, described outer tube two ends is tightly connected with supporting socket respectively, forms two symmetrical nose balance assembly integral structures of putting.Described pin is straight pin, and at outer axial tube, to the uniform pin of radially installing on same cross section tube wall placed in the middle, pin forms the anti-excess in displacement structure of nose balance assembly.
As further improvement technological scheme, supporting bellows is that the common rolling of 2 layers～4 bed thickness 0.2mm～0.5mm Stainless Sheet Steel forms.
As further improvement technological scheme, supporting key sliver transvers section is rectangle, or U-shaped, triangle, with key bar directly supporting spigot outer wall be provided with corresponding opening slot, opening slot cross section is rectangle, or U-shaped, triangle.
The present invention compared with prior art, has following good effect:
1, two nose balance assemblies integrated design, simple in structure, level of integration is high, both Pipelines with Single Direction Compensations separately, also can synchronous bidirectional compensation;
2, adopt symmetric design, two nose balance modular construction parameters are identical, and non-directional restriction is installed, and facilitate user installation;
3, bellows is thin wall multi-layer structure, flexible, and compensation flexibly;
4, flexible bellows-sheathed is contained on the outer wall of inner tube of rigidity and bears external pressure, good stability, and compensation rate is large;
5, built-in displacement rails structure is coaxial, in not hindering nose balance, also has antitorque effect, guarantees that bellows only does axial displacement campaign, is conducive to improve the working life of expansion joint.
Brief description of the drawings
Fig. 1 is that structure of the present invention is partly cutd open schematic diagram.
Fig. 2 is Fig. 1 A-A sectional drawing.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, the invention will be further described.
The antitorque expansion joint of coaxial two-way external compression type shown in Fig. 1, it is made up of jointly inner tube 1, socket 2, bellows 3, spigot 4, key bar 5, outer tube 6 and pin 7.Described outer tube 6 is circle straight tube, and it is the housing structure in the present invention, and outer tube 6 stage casing inner tubal walls are fixedly connected with the key bar 5 of axial installation.Described inner tube 1 stretches into outer tube 6 inner chambers from two ends respectively, on superposition section inner tube 1 outer wall, by the interior suit of order outward be tightly connected successively spigot 4, bellows 3 and socket 2, the inner aperture of inner tube 1 is tightly connected into separate nose balance assembly with spigot 4 endoporus.The present embodiment is applied in urban heating network, bore DN=100mm, and the sensitivity to nose balance when this pipe network operation has strict demand.In order to reach user's usage requirement, the bellows 3 of joining adopts thin wall multi-layer structure, forms with the common rolling of austenitic stainless steel thin plate of 2 bed thickness 0.5mm.Bellows 3 is important elastic compensating devices, and its performance directly affects the sensitivity of compensating movement, can within the scope of 2 layers～4 bed thickness 0.2mm～0.5mm, select according to user's requirement.The flexible foot of bellows 3 of this kind of structure, compensates very flexibly, can meet the supporting requirement of user completely.For fear of bellows 3 unstabilitys, the present invention is sleeved on flexible bellows 3 on inner tube 1 outer wall of rigidity, adds the sealed at both ends connection of bellows 3, forms bellows 3 and bears external pressure.If increase compensation rate, bellows 3 is added longer, under this structural condition, can there are not bellows 3 destabilization problems yet.Described spigot 4 outer walls are provided with the shaft orientation opening groove coordinating with key bar 5, and both relative movement form nose balance assembly displacement rails structure.Described outer tube 6 apertures, two ends are tightly connected with supporting socket 2 respectively, form two symmetrical nose balance assembly integral structures of putting.The integrated design of two nose balance assemblies, simple in structure, level of integration is high, both Pipelines with Single Direction Compensations separately, also can synchronous bidirectional compensation.Built-in displacement rails is coaxial, in not hindering nose balance, also has antitorque effect, guarantees that bellows 3 only does axial displacement campaign, is conducive to improve the working life of expansion joint.There is excessive position for fear of nose balance assembly and move in the present invention, the uniform pin 7 of radially installing on the axial same cross section tube wall placed in the middle of outer tube 6, and pin 7 is straight pin, the pin 7 being fixedly connected with forms nose balance assembly spacing.
The present invention adopts symmetric design, and two nose balance modular construction parameters are identical, therefore non-directional restriction is installed, greatly facilitate user installation.
Claims (5)
1. the antitorque expansion joint of coaxial two-way external compression type, it is made up of jointly inner tube (1), socket (2), bellows (3), spigot (4), key bar (5), outer tube (6) and pin (7); Described outer tube (6) is circle straight tube, and outer tube (6) stage casing inner tubal wall is fixedly connected with the key bar (5) of axial installation; Described inner tube (1) stretches into outer tube (6) inner chamber from two ends respectively, on superposition section inner tube (1) outer wall, by interior order suit outward be tightly connected successively spigot (4), bellows (3) and socket (2), the inner aperture of inner tube (1) and spigot (4) endoporus are tightly connected into two separate nose balance assemblies; It is characterized in that: described spigot (4) outer wall is provided with the shaft orientation opening groove coordinating with key bar (5), both relative movement form nose balance assembly displacement rails structure; Described outer tube (6) aperture, two ends is tightly connected with supporting socket (2) respectively, forms two symmetrical nose balance assembly integral structures of putting; Described pin (7) is straight pin, the uniform pin (7) of radially installing on the axial same cross section tube wall placed in the middle of outer tube (6), and pin (7) forms the anti-excess in displacement structure of nose balance assembly.
2. the antitorque expansion joint of coaxial two-way external compression type according to claim 1, is characterized in that: described bellows (3) is that the common rolling of 2 layers～4 bed thickness 0.2mm～0.5mm Stainless Sheet Steel forms.
3. the antitorque expansion joint of coaxial two-way external compression type according to claim 1, is characterized in that: described key bar (5) cross section is rectangle, and spigot (4) the outer wall upper shed groove cross section matching is similarly rectangle.
4. the antitorque expansion joint of coaxial two-way external compression type according to claim 1, is characterized in that: described key bar (5) cross section is U-shaped, and spigot (4) the outer wall upper shed groove cross section matching is similarly U-shaped.
5. the antitorque expansion joint of coaxial two-way external compression type according to claim 1, is characterized in that: described key bar (5) cross section is triangle, and spigot (4) the outer wall upper shed groove cross section matching is similarly triangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410100318.7A CN103939703A (en) | 2014-03-19 | 2014-03-19 | Coaxial two-way external pressure type anti-twisting expansion joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410100318.7A CN103939703A (en) | 2014-03-19 | 2014-03-19 | Coaxial two-way external pressure type anti-twisting expansion joint |
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| Publication Number | Publication Date |
|---|---|
| CN103939703A true CN103939703A (en) | 2014-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410100318.7A Pending CN103939703A (en) | 2014-03-19 | 2014-03-19 | Coaxial two-way external pressure type anti-twisting expansion joint |
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| CN (1) | CN103939703A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105135068A (en) * | 2015-08-25 | 2015-12-09 | 天鼎联创密封技术（北京）有限公司 | Multilayer through-wall body and application method thereof |
| CN105221846A (en) * | 2015-08-25 | 2016-01-06 | 天鼎联创密封技术（北京）有限公司 | Wall penetration body and using method thereof |
| CN105860998A (en) * | 2016-06-02 | 2016-08-17 | 大连华锐重工焦炉车辆设备有限公司 | Top coal loading vehicle smokeless coal loading system |
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| CN2168156Y (en) * | 1993-05-26 | 1994-06-08 | 于宁 | External-pressure double-directional compensation corrugated expansion joint |
| CN2272095Y (en) * | 1996-01-23 | 1998-01-07 | 扬州市曙光波纹管厂 | Guiding external pressure multi-layer expansible joint |
| CN2329832Y (en) * | 1998-01-26 | 1999-07-21 | 苏文玉 | Axial corrugated expansion joint anti-torsion spacing structure for pipeline |
| CN2628842Y (en) * | 2003-06-18 | 2004-07-28 | 马恩强 | Metal external pressing bidirectional direct-buried corrugated pipe compensator |
| CN2702148Y (en) * | 2004-06-18 | 2005-05-25 | 江苏亚光机械工业有限公司 | External sealing device of corrugated expansion joint |
| DE202007012073U1 (en) * | 2007-08-30 | 2009-01-08 | Witzenmann Gmbh | Device for erasing resonances of a flexible line part and flexible line part |
| CN201661811U (en) * | 2010-03-19 | 2010-12-01 | 江苏扬光机械制造有限公司 | Coaxial two-way external compression type expansion joint |
| CN201723901U (en) * | 2010-07-22 | 2011-01-26 | 南通曙光波纹管制造有限公司 | Antitorque limiting external pressure axial compensator |
| CN203730990U (en) * | 2014-03-19 | 2014-07-23 | 江苏曙光压力容器有限公司 | Coaxial bidirectional externally-pressed type torsion-resistant expansion joint |
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2014
- 2014-03-19 CN CN201410100318.7A patent/CN103939703A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2168156Y (en) * | 1993-05-26 | 1994-06-08 | 于宁 | External-pressure double-directional compensation corrugated expansion joint |
| CN2272095Y (en) * | 1996-01-23 | 1998-01-07 | 扬州市曙光波纹管厂 | Guiding external pressure multi-layer expansible joint |
| CN2329832Y (en) * | 1998-01-26 | 1999-07-21 | 苏文玉 | Axial corrugated expansion joint anti-torsion spacing structure for pipeline |
| CN2628842Y (en) * | 2003-06-18 | 2004-07-28 | 马恩强 | Metal external pressing bidirectional direct-buried corrugated pipe compensator |
| CN2702148Y (en) * | 2004-06-18 | 2005-05-25 | 江苏亚光机械工业有限公司 | External sealing device of corrugated expansion joint |
| DE202007012073U1 (en) * | 2007-08-30 | 2009-01-08 | Witzenmann Gmbh | Device for erasing resonances of a flexible line part and flexible line part |
| CN201661811U (en) * | 2010-03-19 | 2010-12-01 | 江苏扬光机械制造有限公司 | Coaxial two-way external compression type expansion joint |
| CN201723901U (en) * | 2010-07-22 | 2011-01-26 | 南通曙光波纹管制造有限公司 | Antitorque limiting external pressure axial compensator |
| CN203730990U (en) * | 2014-03-19 | 2014-07-23 | 江苏曙光压力容器有限公司 | Coaxial bidirectional externally-pressed type torsion-resistant expansion joint |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105135068A (en) * | 2015-08-25 | 2015-12-09 | 天鼎联创密封技术（北京）有限公司 | Multilayer through-wall body and application method thereof |
| CN105221846A (en) * | 2015-08-25 | 2016-01-06 | 天鼎联创密封技术（北京）有限公司 | Wall penetration body and using method thereof |
| CN105221846B (en) * | 2015-08-25 | 2017-07-25 | 天鼎联创密封技术（北京）有限公司 | Wall penetration body |
| CN105860998A (en) * | 2016-06-02 | 2016-08-17 | 大连华锐重工焦炉车辆设备有限公司 | Top coal loading vehicle smokeless coal loading system |
| CN105860998B (en) * | 2016-06-02 | 2019-05-17 | 大连华锐重工焦炉车辆设备有限公司 | A kind of top charging car Anthracite coal system |
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Application publication date: 20140723 |