CN210106575U - High-pressure flange sealing structure for heat exchange device header - Google Patents
High-pressure flange sealing structure for heat exchange device header Download PDFInfo
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- CN210106575U CN210106575U CN201920779700.3U CN201920779700U CN210106575U CN 210106575 U CN210106575 U CN 210106575U CN 201920779700 U CN201920779700 U CN 201920779700U CN 210106575 U CN210106575 U CN 210106575U
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Abstract
The utility model discloses a high-pressure flange seal structure for on heat transfer device collection case, include: the main sealing strip is placed on the inner side of the retainer ring and then stuck to the inner side of the retainer ring through a plurality of main anti-falling blocks arranged on the header flange, and when the main sealing strip is in an uncompressed state, the height H of the main sealing strip is higher than the height H' of the retainer ring; the main sealing strip is formed by integrally forming a semicircular sealing ring and a rectangular sealing ring, the semicircular sealing ring is positioned on the inner side of the rectangular sealing ring, an annular through hole is formed in the semicircular sealing ring, and the annular through hole is concentric with the semicircular ring of the semicircular sealing ring in the same section. The high-pressure flange sealing structure used on the heat exchange device header has good sealing performance and can be suitable for occasions with high pressure and large temperature fluctuation.
Description
Technical Field
The utility model relates to a flue gas optimal utilization energy saving and emission reduction heat transfer device especially relates to a high-pressure flange seal structure for on heat transfer device collection case.
Background
Large pipelines related in the industries of electric power, steel and the like are generally connected by large flanges, and the sealing of the large flanges with low working condition pressure is generally sealed by flat gaskets, which is the most common forced sealing. The principle of flat gasket sealing is that under pretension and working pressure, enough pressing force is applied by fastening bolts on a large flange to realize sealing.
The flat gasket in the flat gasket seal is disposable, and for a large flange with large structural size and heavy structure, the flat gasket needs to be replaced again in each overhaul, and the flat gasket is replaced very frequently. In addition, the larger the structural size of the large flange is, the larger the working pressure born by the large flange is, the more difficult the flatness of the flange connecting surface is to be ensured, and therefore, the flat gasket is used for sealing, so that the leakage is difficult to avoid.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that needs to solve is: the high-pressure flange sealing structure for the heat exchange device header is good in sealing performance and suitable for occasions with high pressure and large temperature fluctuation.
The high-pressure flange sealing structure for the header of the heat exchange device is designed aiming at solving the sealing problem existing when the header is used for replacing each butt joint instead of a bent pipe-shaped butt joint used for connecting each heat exchange pipe in the original heat exchange device. The header comprises a header body and header side plates, a plurality of through holes corresponding to the heat exchange tubes are arranged on the header side plates, and the heat exchange tubes can extend into the header through the corresponding through holes in a sealing manner. The container comprises a container body, a container side plate and a plurality of fasteners, wherein the container body is provided with a container flange, the container side plate is provided with a container side plate flange, the container flange is uniformly provided with a plurality of flange connecting holes in a surrounding manner, the container side plate flange is provided with a plurality of flange through holes in one-to-one correspondence with the flange connecting holes, and the container flange and the container side plate flange are fixedly connected after the fasteners respectively penetrate through the corresponding flange connecting holes and the flange through holes. The joint of the header flange and the header side plate flange needs to adopt a sealing structure so as to prevent the liquid medium in the inner cavity of the header from leaking from the joint of the header flange and the header side plate flange.
In order to solve the above problem, the utility model adopts the following technical scheme: a high-pressure flange seal structure for on heat transfer device collection case, include: the flange of the side plate of the header is provided with a plurality of flange connecting holes which are in one-to-one correspondence with the flange connecting holes, and each fastener passes through the corresponding flange connecting hole and the flange through hole and then fastens and connects the flange of the header and the flange of the side plate of the header; a retainer ring is arranged on the header flange positioned on the inner side of the flange connecting hole, the main sealing strip is placed on the inner side of the retainer ring and then attached to the inner side of the retainer ring through a plurality of main anti-falling blocks arranged on the header flange, and when the main sealing strip is in an uncompressed state, the height H of the main sealing strip is higher than the height H' of the retainer ring; the main sealing strip is formed by integrally forming a semi-circular sealing ring and a rectangular sealing ring, the semi-circular sealing ring is positioned on the inner side of the rectangular sealing ring, and the diameter of the semi-circular sealing ring is the same as the height h of the rectangular sealing ring; the semicircular sealing ring is provided with an annular through hole, and the annular through hole is concentric with the semicircular ring of the semicircular sealing ring in the same section.
Further, according to the high-pressure flange sealing structure for the heat exchange device header, after the header flange is connected with the header side plate flange in a sealing manner through the fasteners, a gap is reserved between the retainer ring and the header side plate flange.
Further, aforementioned a high pressure flange seal structure for on heat transfer device collection case, wherein, the ratio of cyclic annular through-hole radius R and semicircle ring radius R of semicircle ring seal circle is: R/R =31% -49%.
Further, in the aforementioned high-pressure flange sealing structure for a header of a heat exchanger, a layer of grease is coated on each of the upper and lower top surfaces of the main sealing strip.
Further, according to the high-pressure flange sealing structure for the header of the heat exchange device, the header flange located outside the flange connecting hole is provided with the side pressure support ring, and after the header flange and the header side plate flange are hermetically connected through the plurality of fasteners, the side pressure support ring is supported against the header side plate flange.
Further, in the above-mentioned high-pressure flange sealing structure for a header of a heat exchanger, the side pressure sealing strip is placed inside the side pressure supporting ring and then stuck inside the side pressure supporting ring through a plurality of auxiliary anti-dropping blocks arranged on the header flange, and when the side pressure sealing strip is in an uncompressed state, the height L of the side pressure sealing strip is higher than the height L' of the side pressure supporting ring.
The utility model has the advantages of ① require lowly to connection structure rigidity, the leakage pressure that the main seal strip bore is bigger, then the good better from the sealing effect of main seal strip, be applicable to the occasion that high pressure and temperature fluctuation are great, ② setting up of grease layer is first be convenient for the installation location of main seal strip, second it reduces the frictional resistance between main seal strip and header flange and the header curb plate flange, make the main seal strip pressurized deformation move more smoothly, third it is more arbitrary and the surface is difficult for scotching that the main seal strip pressurized deformation is more arbitrary, ③ side pressure support ring set up and guarantee header flange and header curb plate flange and main seal strip contact balance, further improve sealing performance.
Drawings
Fig. 1 is a schematic structural view of a high-pressure flange sealing structure for a heat exchanger header of the present invention, which is arranged on the header.
Fig. 2 is a schematic structural diagram of a high-pressure flange sealing structure used on a header of the heat exchange device in the part a in fig. 1.
FIG. 3 is a schematic cross-sectional view of a primary seal strip.
Fig. 4 is a schematic structural view of the header flange of fig. 2.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and preferred embodiments.
The high-pressure flange sealing structure for the header of the heat exchange device is designed aiming at solving the sealing problem existing when the header is used for replacing each butt joint instead of a bent pipe-shaped butt joint used for connecting each heat exchange pipe in the original heat exchange device. The sealing structure for the high pressure flange on the header of the heat exchange device is described herein in connection with one of the header structures on the heat exchange device, with the sealing structures in the remaining headers being the same. As shown in fig. 1, the header is composed of a header body 1 and a header side plate 2, and the header side plate 2 is provided with a plurality of through holes corresponding to the heat exchange tubes, and the heat exchange tubes can be hermetically inserted into the header through the corresponding through holes. The container body 1 is provided with a container flange 11, the container side plate 2 is provided with a container side plate flange 21, the container flange 11 is uniformly provided with a plurality of flange connecting holes in a surrounding manner, the container side plate flange 21 is provided with a plurality of flange through holes in one-to-one correspondence with the flange connecting holes, and the container flange 11 and the container side plate flange 21 are fastened and connected after each fastener 3 respectively passes through the corresponding flange connecting holes and the flange through holes. The fastener 3 may be a bolt and nut fit kit.
The joint of the header flange 11 and the header side plate flange 21 needs to adopt a sealing structure to prevent the liquid medium in the header inner cavity from leaking from the joint of the header flange 11 and the header side plate flange 21. As shown in fig. 1, fig. 2 and fig. 4, the high-pressure flange sealing structure for a header of a heat exchange device according to the present embodiment includes: the header flange 11 and the header side plate flange 21 are provided with a retainer ring 4 on the header flange 11 positioned on the inner side of a flange connecting hole, the main sealing strip 5 is placed on the inner side of the retainer ring 4 and then attached to the inner side of the retainer ring 4 through a plurality of main anti-falling blocks 6 arranged on the header flange 11, and when the main sealing strip 5 is in an uncompressed state, the height H of the main sealing strip 5 is higher than the height H' of the retainer ring 4. Wherein, each main anti-drop block 6 is arranged at the inner side of the retainer ring 4 at intervals. When the header flange 11 and the header side plate flange 21 are connected through the fasteners 3 in a sealing manner, a gap is reserved between the retainer ring 4 and the header side plate flange 21, the main sealing strip 5 is positioned in a containing cavity formed by the header flange 11, the header side plate flange 21, the retainer ring 4 and the first anti-falling blocks 6 in a surrounding manner, the upper top surface 54 of the main sealing strip 5 is tightly attached to the header flange 11 in a sealing manner, and the lower bottom surface 55 of the main sealing strip 5 is tightly attached to the header side plate flange 21 in a sealing manner.
As shown in fig. 3, the main seal 5 is formed by integrally molding a semicircular seal ring 51 and a rectangular seal ring 52, the semicircular seal ring 51 is located inside the rectangular seal ring 52, and the diameter of the semicircular seal ring 51 is the same as the height h of the rectangular seal ring. The semicircular sealing ring 51 is provided with an annular through hole 53, the annular through hole 53 is concentric with the semicircular ring of the semicircular sealing ring 52 in the same cross section, and the ratio of the radius R of the annular through hole 52 to the radius R of the semicircular ring of the semicircular sealing ring 52 is as follows: R/R =31% -49%.
The primary seal strip 5 has an initial deformation during assembly so that a certain pressure is generated between the header flange 11 and the header side panel flange 21 to form an initial seal. As the arrow direction mark shown in FIG. 2 is the leakage pressure direction, during operation, under the influence of leakage pressure, the semi-circular ring surface 511 on the main seal strip 5 bears circumferential compression, forcing the main seal strip 5 to extend and deform towards both sides of the header flange 11 and the header side plate flange 21, the main seal strip 5 increases the contact area with the header side plate flange 21 due to hollow extrusion, and simultaneously the contact pressure between the main seal strip 5 and the header flange 11 and the header side plate flange 21 also increases, so that the main seal strip 5 is more tightly contacted with the header flange 11 and the header side plate flange 21, the sealing performance is good, and the self-sealing effect is realized. The larger the leakage pressure borne by the main sealing strip 5 is, the better the self-sealing effect of the main sealing strip 5 is, and the method is suitable for occasions with high pressure and large temperature fluctuation.
In this embodiment, the upper top surface 54 and the lower bottom surface 55 of the main seal strip 5 are coated with the grease layer 50. The lubricating grease layer 50 is arranged for facilitating the installation and positioning of the main sealing strip 5; secondly, the friction resistance between the main sealing strip 5 and the header flange 11 and the header side plate flange 21 is reduced, so that the main sealing strip 5 is pressed, deformed and moved more smoothly; thirdly, the main sealing strip 5 is more randomly deformed under pressure and the surface is not easily scratched.
As shown in fig. 2, in the present embodiment, the side pressure support rings 7 are provided on the header flange 11 located outside the flange attachment holes, and after the header flange 11 and the header side plate flange 21 are sealingly attached by the fastening members 3, the side pressure support rings 7 are supported against the header side plate flange 21. The side pressure sealing strips 8 are placed on the inner side of the side pressure support ring 7 and then are attached to the inner side of the side pressure support ring 7 through a plurality of auxiliary anti-falling blocks 9 arranged on a header flange 11, and when the side pressure sealing strips 5 are in an uncompressed state, the height L of the side pressure sealing strips 5 is higher than the height L' of the side pressure support ring 7. The sub anti-dropping blocks 9 are arranged at intervals inside the side pressure support ring 7.
As shown in fig. 1, the direction of the arrow is indicated as a simplified diagram of the compression of the header, the compression of the header generates a side pressure which forces the inner side of the header flange 11 to stretch outwards and the outer side of the header flange 11 to approach the header side plate flange 21, and the side pressure support ring 7 is arranged between the header flange 11 and the header side plate flange 21 in a blocking manner to resist the side pressure, so as to ensure that the header flange 11 and the header side plate flange 21 are in contact balance with the main seal 5, and further improve the sealing performance.
The high-pressure flange sealing structure can be used for sealing the joint of the header flange 11 and the header side plate flange 21 under the high-pressure working condition of 100-300 tons of header working pressure, and the sealing effect is very good.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any modifications or equivalent changes made in accordance with the technical spirit of the present invention are also within the scope of the present invention.
The utility model has the advantages that ① requirement on connection structure rigidity is low, the larger the leakage pressure that main sealing strip 5 bore, the better the self-sealing effect of main sealing strip 5 is, be applicable to the occasion that high pressure and temperature fluctuation are great, ② setting of grease layer is the first one be convenient for the installation location of main sealing strip 5, its second reduces the frictional resistance between main sealing strip 5 and header flange 11 and header curb plate flange 21, make main sealing strip 5 compressive deformation remove more smoothly, the third is that main sealing strip 5 compressive deformation is more arbitrary and the surface is difficult for scotching, ③ side pressure support ring 7 sets up and guarantees header flange 11 and header curb plate flange 21 and main sealing strip 5 contact balance, further improve sealing performance.
Claims (6)
1. A high-pressure flange seal structure for on heat transfer device collection case, its characterized in that: the method comprises the following steps: the flange of the side plate of the header is provided with a plurality of flange connecting holes which are in one-to-one correspondence with the flange connecting holes, and each fastener passes through the corresponding flange connecting hole and the flange through hole and then fastens and connects the flange of the header and the flange of the side plate of the header; a retainer ring is arranged on the header flange positioned on the inner side of the flange connecting hole, the main sealing strip is placed on the inner side of the retainer ring and then attached to the inner side of the retainer ring through a plurality of main anti-falling blocks arranged on the header flange, and when the main sealing strip is in an uncompressed state, the height H of the main sealing strip is higher than the height H' of the retainer ring; the main sealing strip is formed by integrally forming a semi-circular sealing ring and a rectangular sealing ring, the semi-circular sealing ring is positioned on the inner side of the rectangular sealing ring, and the diameter of the semi-circular sealing ring is the same as the height h of the rectangular sealing ring; the semicircular sealing ring is provided with an annular through hole, and the annular through hole is concentric with the semicircular ring of the semicircular sealing ring in the same section.
2. The high pressure flange seal arrangement for a heat exchange unit header of claim 1, wherein: after the header flange and the header side plate flange are connected in a sealing manner through the fasteners, a gap is reserved between the check ring and the header side plate flange.
3. The high pressure flange seal arrangement for a heat exchange unit header of claim 1, wherein: the proportion of the radius R of the annular through hole to the radius R of the semicircular ring sealing ring is as follows: R/R =31% -49%.
4. A high pressure flange seal arrangement for use on a heat exchange unit header as claimed in claim 1, 2 or 3, wherein: the upper top surface and the lower bottom surface of the main sealing strip are respectively coated with a lubricating grease layer.
5. A high pressure flange seal arrangement for use on a heat exchange unit header as claimed in claim 1, 2 or 3, wherein: and a side pressure support ring is arranged on the header flange positioned outside the flange connecting hole, and the side pressure support ring is supported on the header side plate flange in an abutting mode after the header flange and the header side plate flange are hermetically connected through a plurality of fasteners.
6. The high pressure flange seal arrangement for a heat exchange unit header of claim 5, wherein: the side pressure sealing strip is placed on the inner side of the side pressure supporting ring and then is attached to the inner side of the side pressure supporting ring through a plurality of auxiliary anti-falling blocks arranged on the header flange, and when the side pressure sealing strip is in an uncompressed state, the height L of the side pressure sealing strip is higher than the height L' of the side pressure supporting ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920779700.3U CN210106575U (en) | 2019-05-28 | 2019-05-28 | High-pressure flange sealing structure for heat exchange device header |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920779700.3U CN210106575U (en) | 2019-05-28 | 2019-05-28 | High-pressure flange sealing structure for heat exchange device header |
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| CN210106575U true CN210106575U (en) | 2020-02-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145599A (en) * | 2019-05-28 | 2019-08-20 | 江苏龙净节能科技有限公司 | High pressure flange sealing structure in heat-exchanger rig header |
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2019
- 2019-05-28 CN CN201920779700.3U patent/CN210106575U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145599A (en) * | 2019-05-28 | 2019-08-20 | 江苏龙净节能科技有限公司 | High pressure flange sealing structure in heat-exchanger rig header |
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