CN203730990U - Coaxial bidirectional externally-pressed type torsion-resistant expansion joint - Google Patents
Coaxial bidirectional externally-pressed type torsion-resistant expansion joint Download PDFInfo
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- CN203730990U CN203730990U CN201420122199.0U CN201420122199U CN203730990U CN 203730990 U CN203730990 U CN 203730990U CN 201420122199 U CN201420122199 U CN 201420122199U CN 203730990 U CN203730990 U CN 203730990U
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- Prior art keywords
- expansion joint
- coaxial
- tube
- key bar
- outer tube
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- 230000002457 bidirectional effect Effects 0.000 title abstract description 8
- 238000006073 displacement reaction Methods 0.000 claims abstract description 15
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 5
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 230000010354 integration Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000001687 destabilization Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model discloses a coaxial bidirectional externally-pressed type torsion-resistant expansion joint. The coaxial bidirectional externally-pressed type torsion-resistant expansion joint consists of an inner tube, outer joints, corrugated tubes, inner joints, a key bar, an outer tube and pins, wherein the key bar which is mounted axially is fixedly connected to the internal wall of the middle segment of the outer tube; the inner tube extends into the internal chamber of the outer tube respectively from two ends, and the inner joints, the corrugated tubes and the outer joints are sequentially connected to an overlapped segment of the inner and outer tubes in a sleeved and sealed manner, so as to form a mutually-independent axial compensation assembly; axially-open grooves matched with the key bar are formed in the external walls of the inner joints, and an axial compensation assembly displacement track structure is formed through the relative motion of the inner joints and the key bar; holes of the two ends of the outer tube are in sealed connection with the assorted outer joints respectively, so as to form two symmetrically-placed integrated axial compensation assembly structures. According to the coaxial bidirectional externally-pressed type torsion-resistant expansion joint, the structure is simple, the integration level is high, unidirectional compensation can be carried out respectively, and bidirectional compensation can also be carried out synchronously; the built-in displacement track is coaxial, so that a role in resisting torsion is played while axial compensation is not hindered, the condition that the corrugated tubes do axial displacement movement only is ensured, and the prolongation of the service life of the expansion joint is facilitated.
Description
Technical field
The utility model relates to a kind of pipe safety device, and specifically, the utility model 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.
Model utility content
The utility model 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 utility model 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 utility model 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 the utility model structure 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 utility model is described in further detail.
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 utility model, 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 utility model 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 utility model, 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 utility model 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 |
|---|---|---|---|
| CN201420122199.0U CN203730990U (en) | 2014-03-19 | 2014-03-19 | Coaxial bidirectional externally-pressed type torsion-resistant expansion joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420122199.0U CN203730990U (en) | 2014-03-19 | 2014-03-19 | Coaxial bidirectional externally-pressed type torsion-resistant expansion joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203730990U true CN203730990U (en) | 2014-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420122199.0U Expired - Lifetime CN203730990U (en) | 2014-03-19 | 2014-03-19 | Coaxial bidirectional externally-pressed type torsion-resistant expansion joint |
Country Status (1)
| Country | Link |
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| CN (1) | CN203730990U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939703A (en) * | 2014-03-19 | 2014-07-23 | 江苏曙光压力容器有限公司 | Coaxial two-way external pressure type anti-twisting expansion joint |
-
2014
- 2014-03-19 CN CN201420122199.0U patent/CN203730990U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939703A (en) * | 2014-03-19 | 2014-07-23 | 江苏曙光压力容器有限公司 | Coaxial two-way external pressure type anti-twisting expansion joint |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140723 |
|
| CX01 | Expiry of patent term |