CN221723639U - Corrosion-resistant expansion joint capable of bearing high temperature and high positive and negative pressure - Google Patents
Corrosion-resistant expansion joint capable of bearing high temperature and high positive and negative pressure Download PDFInfo
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- CN221723639U CN221723639U CN202323476778.3U CN202323476778U CN221723639U CN 221723639 U CN221723639 U CN 221723639U CN 202323476778 U CN202323476778 U CN 202323476778U CN 221723639 U CN221723639 U CN 221723639U
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- expansion joint
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- 238000005260 corrosion Methods 0.000 title claims abstract description 26
- 230000007797 corrosion Effects 0.000 title claims abstract description 21
- 229920000840 ethylene tetrafluoroethylene copolymer Polymers 0.000 claims description 4
- 229920009441 perflouroethylene propylene Polymers 0.000 claims description 4
- 229920011301 perfluoro alkoxyl alkane Polymers 0.000 claims description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
- 238000009434 installation Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The utility model discloses an anti-corrosion expansion joint capable of bearing high temperature and high positive and negative pressure, which comprises: the top of the elastic expansion part is fixedly connected with the first flange, the bottom of the elastic expansion part is fixedly connected with the second flange, the limiting part is connected between the first flange and the second flange, the utility model provides an anti-corrosion expansion joint which has reliable structure, convenient installation, wide application range, corrosion resistance and high temperature and high positive and negative pressure resistance and can bear high temperature and high pressure environments.
Description
Technical Field
The utility model relates to the field of chemical equipment, in particular to an anti-corrosion expansion joint capable of bearing high temperature and high positive and negative pressure.
Background
The expansion joint is a flexible element which can effectively compensate axial deformation, shrinkage, dislocation and angular offset. For example, the expansion joint welded on the shell of the fixed tube-plate heat exchanger has large axial flexibility and is easy to deform, the thermal expansion difference of the tube and the shell caused by different wall temperatures can be compensated, and the axial load of the tube and the shell is reduced, so that the temperature difference stress of the tube, the tube plate and the shell is reduced, and the damage caused by strength damage, instability damage and tube pull-out damage is avoided.
As the expansion joint is used as an elastic compensation element capable of freely stretching, the expansion joint has the advantages of reliable work, good performance, compact structure and the like, and is widely applied to the departments of chemical industry, metallurgy, nuclear energy and the like. Particularly, expansion joints used in the chemical industry are required to have corrosion resistance and to be capable of withstanding high temperatures and high positive and negative pressures.
The expansion joint in the prior art does not have an anti-corrosion function at first, and further has serious deformation when being used in positive high-pressure or negative high-pressure equipment. The device is severely expanded under the condition of positive high pressure, severely invaginated or even closed under the condition of negative high pressure, and can not be used.
Disclosure of utility model
In order to solve the problems, the utility model aims to provide the corrosion-resistant expansion joint which has the advantages of reliable structure, convenient installation, wide application range, corrosion resistance and high temperature and high positive and negative pressure resistance and can bear high-temperature and high-pressure environments.
According to one aspect of the present utility model, there is provided an anti-corrosive expansion joint which can withstand high temperature and high positive and negative pressure, comprising: the device comprises a first flange, a second flange, an elastic expansion part and a limiting part, wherein the top of the elastic expansion part is fixedly connected with the first flange, the bottom of the elastic expansion part is fixedly connected with the second flange, the limiting part is connected between the first flange and the second flange, and the limiting part limits the position of the elastic expansion part in radial movement. The first flange and the second flange are connected with pipelines at two ends, and the limiting part is used for limiting the elastic telescopic part to move along the radial direction so as to be convenient to use in positive and negative high-pressure equipment.
In some embodiments, the first flange is provided with a plurality of first mounting holes, the first mounting holes are provided with a plurality of second mounting holes and distributed in an annular array with the axis of the first flange as the center of a circle, and at least 3 second mounting holes are arranged on the outer side of the first mounting holes. The device is convenient to connect with the equipment pipeline through the first mounting hole, and the limiting part is convenient to fix through the second mounting hole.
In some embodiments, the second flange is provided with a plurality of third mounting holes, the third mounting holes are provided with a plurality of third mounting holes and distributed in an annular array with the axis of the second flange as the center of a circle, and at least 3 fourth mounting holes are arranged on the outer side of the third mounting holes. The device is convenient to connect with the equipment pipeline through the third mounting hole, and the limiting part is convenient to fix through the fourth mounting hole.
In some embodiments, the first flange is vertically disposed above the second flange, the second mounting hole is disposed corresponding to the fourth mounting hole, and the limiting portion passes through the second mounting hole and the fourth mounting hole.
In some embodiments, the number of the limiting portions is equal to the number of the second mounting holes or the fourth mounting holes. By providing at least 3 limit parts, the first fixing ring and the second fixing ring are further limited to move outwards.
In some embodiments, the limit portion includes: the first bolt passes the fourth mounting hole, and the stop collar cover is established at the outer wall of first bolt and is arranged in between first flange and the second flange, and the second mounting hole is stretched out at the top of first bolt, and first nut is connected at the top of first bolt. The first fixing ring and the second fixing ring are limited to move outwards by blocking of the limiting sleeve.
In some embodiments, the first nut adjusts the spacing between the stop collar and the first flange bottom and the second flange top. The inner shrinkage dimension of the elastic expansion part is controlled by the blocking of the first flange and the second flange to the limit sleeve through the spacing between the top of the limit sleeve and the first flange and the second flange.
In some embodiments, the elastic telescoping portion includes: the first fixing ring, the second fixing ring, first elastic sheet, the second elastic sheet, second bolt and second nut, be equipped with a plurality of fifth mounting holes on the first fixing ring, be equipped with a plurality of sixth mounting holes on the second fixing ring, first elastic sheet one end is equipped with a plurality of seventh mounting holes, the other end fixed connection first flange of first elastic sheet, second elastic sheet one end is equipped with a plurality of eighth mounting holes, the other end fixed connection second flange of second elastic sheet, the second bolt passes sixth mounting hole in proper order, eighth mounting hole, seventh mounting hole and fifth mounting hole, second nut and second bolt threaded connection closely laminate first elastic sheet and second elastic sheet. The ends of the first elastic piece and the second elastic piece are sealed and fixed through the first fixing ring and the second fixing ring, and the second limit is the distance that the first elastic piece and the second elastic piece move outwards under the condition of positive high pressure.
In some embodiments, the stop collar has a gap with the outer walls of the first and second retainers, the stop collar defining outward movement of the first and second retainers. The distance between the first elastic piece and the second elastic piece which move outwards under the condition of positive high pressure is limited by the clearance between the limiting sleeve and the outer walls of the first fixing ring and the second fixing ring.
In some embodiments, the first and second elastic panels are made of PFA, FEP, ETFE or PTFE. The first elastic sheet and the second elastic sheet made of the materials have corrosion resistance, and can be used in a corrosion environment.
Compared with the prior art, the utility model has the beneficial effects of reliable structure, convenient installation, wide application range, corrosion resistance and high-temperature and high-pressure environment resistance; according to the utility model, the first flange and the second flange are connected with pipelines at two ends, and the elastic expansion part is limited by the limiting part to move along the radial direction, so that the elastic expansion part can be conveniently used in positive and negative high-pressure equipment; the first mounting hole and the third mounting hole are convenient to connect with the equipment pipeline, and the second mounting hole and the fourth mounting hole are convenient to fix the limiting part; by arranging at least 3 limiting parts, the first fixing ring and the second fixing ring are further limited to move outwards; the inner shrinkage dimension of the elastic expansion part is controlled by the blocking of the first flange and the second flange on the limit sleeve through the spacing between the top of the limit sleeve and the first flange and the second flange; the ends of the first elastic piece and the second elastic piece are sealed and fixed through the first fixing ring and the second fixing ring, and the distance of the first elastic piece and the second elastic piece moving outwards under the condition of positive high pressure is limited; the first elastic sheet and the second elastic sheet made of the materials have corrosion resistance, and can be used in a corrosion environment.
Drawings
FIG. 1 is a schematic diagram of an anti-corrosive expansion joint capable of bearing high temperature and high positive and negative pressure;
FIG. 2 is an exploded schematic view of an anti-corrosive expansion joint of the present utility model that can withstand high temperatures and high positive and negative pressures;
FIG. 3 is a top view of an anti-corrosive expansion joint of the present utility model that can withstand high temperatures and high positive and negative pressures;
fig. 4 is a cross-sectional view of B-B in fig. 3.
Detailed Description
The present utility model will be described in detail below with reference to the embodiments shown in the drawings, but it should be understood that the embodiments are not limited to the utility model, and equivalent changes or substitutions of functions, methods or structures according to the embodiments by those skilled in the art are included in the scope of the present utility model.
In the description of the present utility model, it should be noted that, unless otherwise specified and defined, the terms
"Mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, mechanical or electrical, or may be in communication with each other within two elements, directly or indirectly through intermediaries, as will be understood by those of ordinary skill in the art, and the specific meaning of the terms may be understood in view of the specific circumstances.
As shown in fig. 1 and 2, the anti-corrosion expansion joint capable of bearing high temperature and high positive and negative pressure according to the present utility model comprises: the device comprises a first flange 1, a second flange 2, an elastic telescopic part 3 and a limiting part 4, wherein the top of the elastic telescopic part 3 is fixedly connected with the first flange 1, the bottom of the elastic telescopic part 3 is fixedly connected with the second flange 2, the limiting part 4 is connected between the first flange 1 and the second flange 2, and the limiting part 4 limits the position of the elastic telescopic part 3 moving along the radial direction. The first flange 1 and the second flange 2 are connected with pipelines at two ends, and the limiting part 4 is used for limiting the elastic expansion part 3 to move along the radial direction so as to be convenient to use in positive and negative high-pressure equipment.
As shown in fig. 3, a plurality of first mounting holes 11 are formed in the first flange 1, the first mounting holes 11 are formed in a plurality of first mounting holes 11 and distributed in an annular array with the axis of the first flange 1 as the center of a circle, and at least 3 second mounting holes 12 are formed in the outer side of the first mounting holes 11. The first mounting holes 11 are convenient to connect with equipment pipelines, and the second mounting holes 12 are convenient to fix the limiting part 4. The second mounting holes 12 are also distributed in an annular array with the axis of the first flange 1 as the center of the circle, so the second mounting holes 12 are outside the first mounting holes 11.
The second flange 2 is provided with a plurality of third mounting holes 21, the third mounting holes 21 are provided with a plurality of fourth mounting holes which are distributed in an annular array by taking the axle center of the second flange 2 as the circle center, and at least 3 fourth mounting holes are arranged on the outer side of the third mounting holes 21. The third mounting hole 21 facilitates connection with the equipment pipeline, and the fourth mounting hole 22 facilitates fixing of the limiting portion 4. The fourth mounting holes 22 are also distributed in an annular array with the axis of the second flange 2 as the center of the circle, so the fourth mounting holes 22 are outside the third mounting holes.
The first flange 1 is vertically arranged above the second flange 2, the second mounting hole 12 is correspondingly arranged in the fourth mounting hole 22, and the limiting part 4 penetrates through the second mounting hole 12 and the fourth mounting hole 22.
The number of the limiting parts 4 is identical to that of the second mounting holes 12 or the fourth mounting holes 22. By providing at least 3 stopper portions 4, the first retainer ring 31 and the second retainer ring 32 are further restricted from moving outward.
As shown in fig. 4, the stopper 4 includes: the first bolt 41, the first nut 42 and the stop collar 43, the first bolt 41 passes through the fourth mounting hole 22, the stop collar 43 is sleeved on the outer wall of the first bolt 41 and is arranged between the first flange 1 and the second flange 2, the top of the first bolt 41 extends out of the second mounting hole 12, and the first nut 42 is connected with the top of the first bolt 41. The first retainer ring 31 and the second retainer ring 32 are restrained from moving outwardly by the stop of the stop collar 43.
The positions and more than 3 positions of the limiting parts 4 are mainly for moving the first fixing ring 31 and the second fixing ring 32, and if the number of the limiting parts 4 is 1 or 2, the limiting sleeve 43 can not block the movement of the first fixing ring 31 and the second fixing ring 32 in the process of shifting the first fixing ring 31 and the second fixing ring 32.
The first nut 42 adjusts the spacing between the stop collar 43 and the bottom of the first flange 1 and the top of the second flange 2. The inner shrinkage dimension of the elastic expansion part 3 is controlled by the blocking of the first flange 1 and the second flange 2 to the limit sleeve 43 through the spacing between the top of the limit sleeve 43 and the first flange 1 and the second flange 2.
The elastic expansion and contraction section 3 includes: the first fixing ring 31, the second fixing ring 32, the first elastic piece 33, the second elastic piece 34, the second bolt 35 and the second nut 36, a plurality of fifth mounting holes 37 are formed in the first fixing ring 31, a plurality of sixth mounting holes 38 are formed in the second fixing ring 32, a plurality of seventh mounting holes 39 are formed in one end of the first elastic piece 33, the other end of the first elastic piece 33 is fixedly connected with the first flange 1, a plurality of eighth mounting holes 310 are formed in one end of the second elastic piece 34, the other end of the second elastic piece 34 is fixedly connected with the second flange 2, the second bolt 35 sequentially penetrates through the sixth mounting holes 38, the eighth mounting holes 310, the seventh mounting holes 39 and the fifth mounting holes 37, and the second nut 36 and the second bolt 35 are in threaded connection to tightly attach the first elastic piece 33 and the second elastic piece 34. The ends of the first and second elastic pieces 33 and 34 of the first and second pairs are sealed and fixed by the first and second fixing rings 31 and 32, and the second limit the distance the first and second elastic pieces 33 and 34 move outward under positive high pressure.
The spacing collar 43 has a gap with the outer walls of the first and second fixing rings 31 and 32, and the spacing collar 43 limits the first and second fixing rings 31 and 32 to move outwardly. The distance that the first elastic piece 33 and the second elastic piece 34 move outwards under the condition of positive high pressure is limited by the clearance between the limiting sleeve 43 and the outer walls of the first fixing ring 31 and the second fixing ring 32.
The first elastic sheet 33 and the second elastic sheet 34 are made of PFA, FEP, ETFE or PTFE. The first elastic sheet 33 and the second elastic sheet 34 made of these materials provide the present utility model with corrosion resistance, and can be used in a corrosive environment.
The first elastic sheet 33 and the second elastic sheet 34 are made of PFA, FEP, ETFE or PTFE, so that the utility model has the characteristics of corrosion resistance and high temperature resistance, and in the specific implementation process, the first elastic sheet 33 and the second elastic sheet 34 have circular arc transition surfaces to realize expansion and expansion deformation, and the property of the adopted material determines that the first elastic sheet 33 and the second elastic sheet 34 are not deformed greatly under the condition of positive and negative high pressure.
In the using process, under the condition of normal pressure, the positions of the first elastic sheet 33 and the second elastic sheet 34 are not changed greatly, the spacing sleeve 43 is provided with gaps with the outer walls of the first fixing ring 31 and the second fixing ring 32, and the two ends of the spacing sleeve 43 are also provided with gaps with the first flange 1 and the second flange 2; under the condition of positive high pressure, the first elastic piece 33 and the second elastic piece 34 are expanded outwards due to the increase of the pressure in the pipeline, the first fixing ring 31 and the second fixing ring 32 are tightly attached to a limiting column, and the limiting column prevents the first fixing ring 31 and the second fixing ring 32 from continuously moving outwards, so that the first elastic piece 33 and the second elastic piece 34 can work normally; under the condition of negative high pressure, the first elastic piece 33 and the second elastic piece 34 shrink inwards due to the reduction of the pressure in the pipeline, the first fixing ring 31 and the second fixing ring 32 are relatively far away from the limit post, but the distance between the first flange 1 and the second flange 2 is reduced until the limit post stops the first flange 1 and the second flange 2 from being relatively close, and then the first elastic piece 33 and the second elastic piece 34 can work normally.
Because of the structure and material characteristics of the first elastic sheet 33 and the second elastic sheet 34, the first flange 1 and the second flange 2 with the diameters of 200mm are compensated by +/-10 mm, and if the distance required to be compensated is more than 20mm, a plurality of the elastic sheets are required to be overlapped for use.
While only certain embodiments of the present utility model have been described, it will be apparent to those skilled in the art that other modifications and improvements can be made without departing from the inventive concept of the present utility model.
Claims (9)
1. Can bear anticorrosive expansion joint of high temperature and high positive negative pressure, its characterized in that includes: the device comprises a first flange, a second flange, an elastic expansion part and a limiting part, wherein the first flange is fixedly connected with the top of the elastic expansion part, the second flange is fixedly connected with the bottom of the elastic expansion part, the limiting part is connected between the first flange and the second flange, the limiting part limits the radial moving position of the elastic expansion part, and the elastic expansion part comprises: the novel elastic fixing device comprises a first fixing ring, a second fixing ring, a first elastic sheet, a second bolt and a second nut, wherein a plurality of fifth mounting holes are formed in the first fixing ring, a plurality of sixth mounting holes are formed in the second fixing ring, a plurality of seventh mounting holes are formed in one end of the first elastic sheet, the other end of the first elastic sheet is fixedly connected with a first flange, a plurality of eighth mounting holes are formed in one end of the second elastic sheet, the other end of the second elastic sheet is fixedly connected with a second flange, the second bolt sequentially penetrates through the sixth mounting holes, the eighth mounting holes, the seventh mounting holes and the fifth mounting holes, and the second nut is in threaded connection with the second bolt to tightly attach the first elastic sheet and the second elastic sheet.
2. The corrosion-resistant expansion joint capable of bearing high temperature and high positive and negative pressure according to claim 1, wherein a plurality of first mounting holes are formed in the first flange, the first mounting holes are distributed in an annular array with the axis of the first flange as the center of a circle, and at least 3 second mounting holes are formed in the outer side of the first mounting holes.
3. The corrosion-resistant expansion joint capable of bearing high temperature and high positive and negative pressure according to claim 2, wherein a plurality of third mounting holes are formed in the second flange, the third mounting holes are distributed in an annular array with the axis of the second flange as the center of a circle, and at least 3 fourth mounting holes are formed in the outer side of the third mounting holes.
4. The corrosion-resistant expansion joint capable of bearing high temperature and high positive and negative pressure according to claim 3, wherein the first flange is vertically arranged above the second flange, the second mounting hole is correspondingly arranged in the fourth mounting hole, and the limiting part penetrates through the second mounting hole and the fourth mounting hole.
5. The corrosion-resistant expansion joint capable of bearing high temperature and high positive and negative pressure according to claim 4, wherein the number of the limiting parts is equal to the number of the second mounting holes or the fourth mounting holes.
6. The corrosion-resistant expansion joint capable of withstanding high temperatures and high positive and negative pressures according to claim 5, wherein the limiting portion comprises: the first bolt passes through the fourth mounting hole, the stop collar is sleeved on the outer wall of the first bolt and is arranged between the first flange and the second flange, the top of the first bolt extends out of the second mounting hole, and the first nut is connected with the top of the first bolt.
7. The corrosion-resistant expansion joint capable of withstanding high temperatures and high positive and negative pressures as recited in claim 6, wherein the first nut adjusts the spacing between the stop collar and the first flange bottom and the second flange top.
8. The corrosion-resistant expansion joint capable of withstanding high temperatures and high positive and negative pressures as set forth in claim 7 wherein said stop collar has a gap with the outer walls of the first and second retainer rings, said stop collar defining outward movement of said first and second retainer rings.
9. The corrosion resistant expansion joint according to claim 8, wherein said first and second elastic sheets are made of PFA, FEP, ETFE or PTFE.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323476778.3U CN221723639U (en) | 2023-12-20 | 2023-12-20 | Corrosion-resistant expansion joint capable of bearing high temperature and high positive and negative pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323476778.3U CN221723639U (en) | 2023-12-20 | 2023-12-20 | Corrosion-resistant expansion joint capable of bearing high temperature and high positive and negative pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221723639U true CN221723639U (en) | 2024-09-17 |
Family
ID=92680644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323476778.3U Active CN221723639U (en) | 2023-12-20 | 2023-12-20 | Corrosion-resistant expansion joint capable of bearing high temperature and high positive and negative pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221723639U (en) |
-
2023
- 2023-12-20 CN CN202323476778.3U patent/CN221723639U/en active Active
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