CN203948854U - A kind of expansion joint load-carrying construction - Google Patents
A kind of expansion joint load-carrying construction Download PDFInfo
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- CN203948854U CN203948854U CN201420352687.0U CN201420352687U CN203948854U CN 203948854 U CN203948854 U CN 203948854U CN 201420352687 U CN201420352687 U CN 201420352687U CN 203948854 U CN203948854 U CN 203948854U
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- expansion joint
- inner barrel
- cylindrical body
- carrying construction
- joint load
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Abstract
The utility model provides a kind of expansion joint load-carrying construction, comprise outer cylinder body and inner barrel, wherein, described outer cylinder body is connected to form by one section of conic tube and a cylindrical section body, described conic tube top is near inner barrel one side end and join with inner barrel, the end side of described inner barrel, for being connected with bellows, is provided with ring-type stressed member in described outer cylinder body outside.Can effectively solve differential expansion and thermal stress issues, also can solve the intrinsic problem of floating ring structure simultaneously, make the load-carrying construction of expansion joint more reasonable, ensure expansion joint safe operation at high temperature.
Description
Technical field
The utility model belongs to petrochemical industry, is specifically related to a kind of expansion joint load-carrying construction, for the hot wall expansion joint of petroleum refining catalytic cracking (cracking) device high temperature pipe.
Background technique
In petroleum refining catalytic cracking (cracking) device, arranged some hot wall pipelines, the operating temperature of these pipelines can reach 700 DEG C, in order to absorb the thermal expansion of these high temperature pipes, use various expansion joints.Fig. 1 shows more typical a kind of high temperature hot wall hinge expansion joint, comprises cylindrical shell A-1, two enforced loop plane A-2, gusset A-3, linkage A-4, bellows A-5.Its working principle is the rotation by linkage, makes the distortion of compliant member bellows absorb angular displacement, and then complete the absorption to whole piping thermal expansion together with other expansion joint.Linkage in expansion joint is actuating mechanism and stressed member, and what bear is the axial force being produced by interior pressure.This power numerical value is huge, and it acts on cylindrical shell A-1 by dual collar plate A-2 and gusset A-3.In hot wall pipeline, the stress form of the expansion joint of other type and bearing position and above-mentioned expansion joint are similar, and the expansion joint of the type only having is with pull bar, but not hinge plate (as shown in Figure 2).
In the common structure of prior art, no matter be hinge type structure or drawbar structure, the axial force of final expansion joint still acts on cylindrical shell by dual collar plate and gusset, makes this place's working stress larger; Another problem of prior art common structure is because cylindrical shell is different with the temperature of structural member (being dual collar plate, gusset), and thermal expansion amount is also just different, can in cylindrical shell and structural member, produce very large thermal stress.Facts have proved, above working stress and thermal stress are superimposed, and often cause structural damage.For solving above-mentioned thermal stress issues, the patent No. is the way that 200920283566.4 patent adopts a kind of floating ring, mainly comprise a ring-type stressed member, between itself and cylindrical shell, radially leaving certain interval, this gap is for absorbing differential expansions different from barrel temperature due to ring-type stressed member and that radially produced; Front and rear in this structure are provided with block, the effect of block is that axial force transmission that ring-type stressed member is born is to cylindrical shell, between block and cylindrical shell, adopt welded structure, between block and ring-type stressed member, do not weld, and in the time axially leaving gap, so just can absorb work because ring-type stressed member is different from barrel temperature at axial produced differential expansion.This structure is because ring-type stressed member is to float on cylindrical shell, so be called as floating ring.This structure can solve due to the thermal stress issues between the structural member and the cylindrical shell that produce because temperature is different between load-carrying construction part and cylindrical shell.But because all axial forces are to be delivered on cylindrical shell by block again, the intensity of block has just become problem, the shearing that between block and cylindrical shell, weld seam is subject to is very large, hard to carry in the time that working pressure is higher, if the cross section of block is expanded, between itself and cylindrical shell, also can produce thermal stress; In addition, because floating ring is apart from only having a very little gap between high temperature cylindrical shell, the temperature of itself is still higher, and the allowable stress of material is significantly reduced.
Model utility content
The technical problems to be solved in the utility model is to overcome the above-mentioned defect that known technology exists, and a kind of expansion joint load-carrying construction of safety and reliability is provided, to ensure expansion joint safe operation at high temperature.
The utility model is achieved through the following technical solutions, a kind of expansion joint load-carrying construction providing according to the utility model, comprise reducing cylinder and inner barrel, described reducing cylinder is made up of the first cylindrical body joining successively, conic tube and the second cylindrical body, one end of described inner barrel is connected with the inner of the first cylindrical body, the other end is for being connected with bellows, and described the second cylindrical body outside is provided with ring-type stressed member.
The utility model can also take following technological scheme further to realize:
Aforesaid expansion joint load-carrying construction wherein, is provided with thermal-protective coating between conic tube, the second cylindrical body and inner barrel, and described thermal-protective coating is full of the cavity forming between conic tube, the second cylindrical body and inner barrel.
Aforesaid expansion joint load-carrying construction, wherein, at the opening end of described the second cylindrical body, is provided with some blocks along circumference between itself and inner barrel, described block be welded on inner barrel and and the second cylindrical body between leave gap.
Aforesaid expansion joint load-carrying construction, wherein, one end of described inner barrel and the first being connected to of cylindrical body the inner are welded to connect.
Aforesaid expansion joint load-carrying construction, wherein, described ring-type stressed member is provided with hinge plate.
Aforesaid expansion joint load-carrying construction, wherein, described ring-type stressed member is provided with pull bar.
Adopt above structure, solved the thermal stress issues producing due to differential expansion between ring-type stressed member and inner barrel, make the load-carrying construction of expansion joint rationally, reliably.
Brief description of the drawings
Fig. 1 is hinge expansion joint structural representation of the prior art;
Fig. 2 is compound pull bar expansion joint structure schematic diagram in prior art;
Fig. 3-1 is the utility model expansion joint load-carrying construction (hinge template) schematic diagram;
Fig. 3-2 are that the A-A of Fig. 3-1 is to view;
Fig. 4-1 is the utility model expansion joint load-carrying construction (pull rod type) schematic diagram;
Fig. 4-2 are that the B-B of Fig. 4-1 is to view;
Fig. 5 is the schematic diagram of the utility model embodiment's single entry hinge type expansion joint;
Fig. 6 is the schematic diagram of the utility model embodiment's single entry universal type expansion joint;
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, to structure of the present utility model, feature and effect thereof, be described in detail as follows:
As shown in Fig. 3-1,3-2, a kind of expansion joint load-carrying construction that the utility model provides, comprise reducing cylinder 1 and inner barrel 2, described reducing cylinder is made up of the first cylindrical body 11 joining successively, conic tube 12 and the second cylindrical body 13, one end of described inner barrel 2 is connected with the inner of the first cylindrical body 11, the other end is for being connected with bellows, and described the second cylindrical body outside is provided with ring-type stressed member 3.
Present embodiment can further be passed through structure below and realize:
Aforesaid expansion joint load-carrying construction wherein, is provided with thermal-protective coating 6 between conic tube 12, the second cylindrical body 13 and inner barrel 2, and described thermal-protective coating is full of the cavity forming between conic tube 12, the second cylindrical body 13 and inner barrel 2.
Aforesaid expansion joint load-carrying construction, wherein, at the opening end of described the second cylindrical body 13, is provided with some blocks 7 along circumference between itself and inner barrel, described block 7 be welded on inner barrel and and the second cylindrical body between leave gap.
Aforesaid expansion joint load-carrying construction, wherein, one end of described inner barrel 2 and the first being connected to of cylindrical body 11 the inners are welded to connect.
Aforesaid expansion joint load-carrying construction, wherein, described ring-type stressed member is provided with hinge plate 4 (as shown in Fig. 3-1,3-2).
Aforesaid expansion joint load-carrying construction, wherein, described ring-type stressed member is provided with pull bar 5 (as shown in Fig. 4-1,4-2).
By conic tube and the second cylindrical body are set, the first cylindrical body and the inner barrel of ring-type stressed member and high temperature are kept apart, so just ensured that radial and axial differential expansion between ring-type stressed member and inner barrel can not produce thermal stress bearing on the first cylindrical body of interior pressure and inner barrel; By conic tube is set, the interior pressure axial force that ring-type stressed member bears is delivered on the first cylindrical body by conic tube itself, more reliable than other structure; By thermal-protective coating is set, the temperature of the second cylindrical body and ring-type stressed member is significantly reduced, greatly improved the allowable stress of ring-type stressed member; Due to the features of shape of conic tube and inner thermal-protective coating thereof, the temperature that makes conic tube is transitioned into and the second cylindrical body and the identical low temperature of ring-type stressed member gradually by the high temperature identical with inner barrel with the first cylindrical body, and this temperature gradient can reduce until eliminate the thermal stress of conic tube itself; By support block is set, be conducive to maintain the shape of the second cylindrical body and ring-type stressed member.
As shown in Figure 5, above-mentioned expansion joint load-carrying construction can be used for single entry hinge type expansion joint, and the two ends of its bellows are symmetrically connected with above-mentioned expansion joint load-carrying construction, and the hinge plate arranging on its two ends ring-type stressed member connects by bearing pin.Above-mentioned expansion joint load-carrying construction also can be used for universal type expansion joint (as shown in Figure 6).
Except illustrating above, above-mentioned expansion joint load-carrying construction also can be used for multiple hinge type expansion joint, universal double-jointed hinge type expansion joint, universal double-jointed arm-tie type expansion joint, compound free pull rod type expansion joint, knee pipe pressure balance type expansion joint etc., Placement can adopt prior art, does not repeat them here.
In sum, compared with prior art, the expansion joint load-carrying construction providing according to the utility model can effectively solve differential expansion and thermal stress issues, also can solve the intrinsic problem of floating ring structure simultaneously, make the load-carrying construction of expansion joint more reasonable, ensured expansion joint safe operation at high temperature.
The above is only preferred embodiment of the present utility model, and every any simple modification and equivalents of above embodiment being carried out according to the technical solution of the utility model all belongs to the scope that the utility model is protected.
Claims (6)
1. an expansion joint load-carrying construction, comprise reducing cylinder and inner barrel, described reducing cylinder is made up of the first cylindrical body joining successively, conic tube and the second cylindrical body, one end of described inner barrel is connected with the inner of the first cylindrical body, the other end is for being connected with bellows, and described the second cylindrical body outside is provided with ring-type stressed member.
2. expansion joint load-carrying construction according to claim 1, is characterized in that, between conic tube, the second cylindrical body and inner barrel, is provided with thermal-protective coating, and described thermal-protective coating is full of the cavity forming between conic tube, the second cylindrical body and inner barrel.
3. expansion joint load-carrying construction according to claim 2, is characterized in that, at the opening end of described the second cylindrical body, between itself and inner barrel, is provided with some blocks along circumference, described block be welded on inner barrel and and the second cylindrical body between leave gap.
4. expansion joint load-carrying construction according to claim 3, is characterized in that, one end of described inner barrel and the first being connected to of cylindrical body the inner are welded to connect.
5. according to the expansion joint load-carrying construction described in any one in claim 1 to 4, it is characterized in that, described ring-type stressed member is provided with hinge plate.
6. according to the expansion joint load-carrying construction described in any one in claim 1 to 4, it is characterized in that, described ring-type stressed member is provided with pull bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420352687.0U CN203948854U (en) | 2014-06-26 | 2014-06-26 | A kind of expansion joint load-carrying construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420352687.0U CN203948854U (en) | 2014-06-26 | 2014-06-26 | A kind of expansion joint load-carrying construction |
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| Publication Number | Publication Date |
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| CN203948854U true CN203948854U (en) | 2014-11-19 |
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| CN201420352687.0U Active CN203948854U (en) | 2014-06-26 | 2014-06-26 | A kind of expansion joint load-carrying construction |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106090515A (en) * | 2016-08-30 | 2016-11-09 | 洛阳双瑞特种装备有限公司 | A kind of low-voltage high-temperature restricted type expansion joint floating installation |
| CN108246368A (en) * | 2016-12-28 | 2018-07-06 | 中国石化工程建设有限公司 | The self tuning mode main air distributor of thermal expansion |
-
2014
- 2014-06-26 CN CN201420352687.0U patent/CN203948854U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106090515A (en) * | 2016-08-30 | 2016-11-09 | 洛阳双瑞特种装备有限公司 | A kind of low-voltage high-temperature restricted type expansion joint floating installation |
| CN108246368A (en) * | 2016-12-28 | 2018-07-06 | 中国石化工程建设有限公司 | The self tuning mode main air distributor of thermal expansion |
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| GR01 | Patent grant |