CN210089479U - Steel lining tetrafluoro tube plate sealing device for silicon carbide heat exchanger - Google Patents
Steel lining tetrafluoro tube plate sealing device for silicon carbide heat exchanger Download PDFInfo
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- CN210089479U CN210089479U CN201920462880.2U CN201920462880U CN210089479U CN 210089479 U CN210089479 U CN 210089479U CN 201920462880 U CN201920462880 U CN 201920462880U CN 210089479 U CN210089479 U CN 210089479U
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- tube sheet
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- silicon carbide
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Abstract
The utility model discloses a carborundum heat exchanger steel lining tetrafluoro tube sheet sealing device, including first steel lining tube sheet, second steel lining tube sheet, a supporting plate, sealing and leak hunting portion, the backup pad sets up between first steel lining tube sheet and second steel lining tube sheet, leak hunting portion sets up in the backup pad, leak hunting portion includes that the edge of contacting at backup pad and first steel lining tube sheet is equipped with the arch, and form the clearance between arch and the first steel lining tube sheet, the backup pad top is equipped with the detection pipeline, the one end intercommunication clearance of detection pipeline, the manometer is connected to the other end of detection pipeline, the bottom of backup pad is equipped with drainage portion, sealing is including establishing the first sealing between first steel lining tube sheet and carborundum pipe and establishing the second sealing between second steel lining tube sheet and carborundum pipe. The utility model discloses have that structural strength is high, anticorrosive effectual, in time monitor medium leakage, maintain and change facility, sealed effectual, reduce work load, long service life beneficial effect.
Description
Technical Field
The utility model relates to a chemical machinery equipment field, more specifically relates to a carborundum heat exchanger steel lining tetrafluoro tube sheet sealing device.
Background
The silicon carbide heat exchanger is a novel heat exchanger which uses silicon carbide ceramic material as heat transfer medium. The silicon carbide ceramic has the excellent characteristics of corrosion resistance, high temperature resistance, high thermal conductivity, high hardness, wear resistance and the like. The material has excellent performances of high temperature resistance and thermal shock resistance, and cracks do not appear after the air cooling is carried out for more than 50 times from 1000 ℃ to room temperature; the heat conductivity coefficient is equal to that of stainless steel; has good corrosion resistance in oxidizing and acidic media. Therefore, the core of the technology on the silicon carbide heat exchanger lies in how to solve the problems of corrosion prevention, strength improvement and sealing of the tube plate, and two solutions are generally provided for solving the problem of corrosion prevention of the tube plate, namely, enamel is carried out on the metal tube plate to realize corrosion prevention; and secondly, realizing corrosion prevention by using a tetrafluoro tube plate. The enamel process on the metal tube plate is complex, and the enamel explosion can occur when the treatment is not good, so that the whole tube plate is scrapped; the PTFE tube plate has high price, and the strength of the PTFE tube plate is reduced after the PTFE tube plate is heated and pressurized, so that the sealing problem is easily caused.
In the prior art, a fixed pressing mode is usually adopted for pressing a sealing element on a silicon carbide pipe, but the pressing mode is heated and cooled for many times, the sealing material is aged, gaps are formed, and leakage of media is caused. Meanwhile, the whole medium is sealed, so that leakage cannot be found in time even if the leakage occurs.
And because leakage only occurs on individual silicon carbide tubes, the prior art can find that all the ends of the silicon carbide tubes have media after the leakage occurs because the two tube plates are attached together, and cannot know that the leakage occurs on the specific silicon carbide tube, so that the sealing parts of all the silicon carbide ends need to be replaced, and the workload is high.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, an object of the utility model is to provide a structural strength is high, anticorrosive effectual, in time monitor medium leakage, maintain and change convenience, sealed effectual, reduce work load, long service lifeSilicon carbide heat exchanger Steel lining PTFE tube plate sealing device。
According to an aspect of the utility model, a silicon carbide heat exchanger steel lining tetrafluoro tube plate sealing device is provided, including first steel lining tube plate, second steel lining tube plate, a supporting plate, sealing and leak hunting portion, the backup pad sets up between first steel lining tube plate and second steel lining tube plate, leak hunting portion sets up in the backup pad, leak hunting portion includes that the edge in backup pad and first steel lining tube plate contact is equipped with the arch, and form the clearance between arch and the first steel lining tube plate, the backup pad top is equipped with the detection pipeline, the one end intercommunication clearance of detection pipeline, the manometer is connected to the other end of detection pipeline, the bottom of backup pad is equipped with drainage portion, the sealing is including establishing the first sealing between first steel lining tube plate and silicon carbide pipe and establishing the second sealing between second steel lining tube plate and silicon carbide pipe.
In some embodiments, the first steel lining plate comprises a steel lining and a tetrafluoro coating, the steel lining comprises a contact part and a fixing part, the fixing part is arranged around the contact part, a plurality of fixing holes are regularly distributed on the fixing part, a plurality of mounting holes are regularly arranged on the contact part, the tetrafluoro coating is coated on the outer sides of the contact part and the mounting holes, a first fixing part is arranged between the contact part and the tetrafluoro coating, and a second fixing part is arranged between the mounting holes and the tetrafluoro coating.
In some embodiments, the first fixing member is provided with at least one groove, and the first fixing member is a groove in which the width of the notch provided on the contact portion is smaller than the width of the groove bottom.
In some embodiments, the first fixing member is preferably a T-shaped groove provided on the contact portion.
In some embodiments, the first fixing member is preferably a dovetail groove provided on the contact portion.
In some embodiments, the second fixing member is a regular and/or irregular protrusion disposed radially along the mounting hole.
In some embodiments, the second fixing member is preferably provided with an isosceles trapezoid projection along the radial direction of the mounting hole.
In some embodiments, the second fixing member is preferably provided with an isosceles triangle protrusion along the radial direction of the mounting hole.
In some embodiments, the first steel liner plate and the second steel liner plate are identical in structure.
In some embodiments, the first sealing portion comprises a tetrafluoro washer, an O-ring, a tetrafluoro washer, a soft tetrafluoro packing, an O-ring, and a first end socket which are sequentially arranged in a direction away from the supporting plate, the first end socket abuts against the supporting plate, the second sealing portion comprises a tetrafluoro washer, an O-ring, a tetrafluoro washer, a soft tetrafluoro packing, an O-ring, and a second end socket which are sequentially arranged in a direction close to the supporting plate, and the second end socket is in threaded connection with the second steel bushing plate.
The combination of the metal tube plate and the PTFE coating ensures the structural strength of the tube plate and the corrosion resistance; the adhesion between the polytetrafluoroethylene coating and the metal tube plate is enhanced by arranging the first fixing piece and the second fixing piece, the polytetrafluoroethylene coating is prevented from being peeled off, a gap is formed between the support plate and the first steel lining plate and communicated with the pressure gauge, and the condition of medium leakage can be timely found out when the pressure in the gap and the original pressure change under the condition of medium leakage; because the tube plates in the prior art are attached together, if the end parts of all the silicon carbide tubes are stained with media, the specific sealing leakage of which silicon carbide tube or which silicon carbide tubes can not be found in time, so that the silicon carbide tubes are required to be replaced completely, the specific leakage silicon carbide tubes can be found after gaps exist, the replacement and maintenance efficiency is improved, and the workload is reduced.
Drawings
FIG. 1 is a schematic structural diagram of a PTFE tube plate sealing device of a silicon carbide heat exchanger steel lining of the present invention;
FIG. 2 is a cross-sectional view of a PTFE tube plate sealing device of a silicon carbide heat exchanger steel lining of the present invention;
FIG. 3 is a schematic structural diagram of a first steel lining tube plate of the sealing device for the steel lining PTFE tube plate of the silicon carbide heat exchanger of the present invention;
FIG. 4 is a top view of FIG. 3;
FIG. 5 is a sectional view taken along line A-A of FIG. 4;
FIG. 6 is a schematic view of another embodiment of the first fixing member of the sealing device for the PTFE tube sheet of the steel lining of the SiC heat exchanger according to the present invention;
FIG. 7 is a partial enlarged view of B in FIG. 5;
FIG. 8 is a schematic view of another embodiment of a second fixing member of the sealing device for the PTFE tube sheet of the steel lining of the SiC heat exchanger according to the present invention;
fig. 9 is a schematic structural diagram of a sealing part of the silicon carbide heat exchanger steel lining tetrafluoro tube plate sealing device of the present invention.
Detailed Description
The present invention will be further described with reference to the following embodiments.
As shown in fig. 1 and fig. 2, the sealing device for rapid leak detection of a silicon carbide heat exchanger according to the present invention comprises a first steel liner plate 1, a second steel liner plate 2, a supporting plate 3, a sealing portion 4 and a leak detection portion 5, wherein the supporting plate 3 is disposed between the first steel liner plate 1 and the second steel liner plate 2, the leak detection portion 5 is disposed on the supporting plate 3, the leak detection portion 5 comprises a protrusion 51 disposed at an edge of the supporting plate 3 contacting with the first steel liner plate 1, and a gap 52 is formed between the protrusion 51 and the first steel lining plate 1, a detection pipeline is arranged at the top of the support plate 3, one end of the detection pipeline is communicated with the gap 52, the other end of the detection pipeline is connected with a pressure gauge 53, a liquid discharge part 54 is arranged at the bottom of the support plate 3, and the sealing part 4 comprises a first sealing part 4 arranged between the first steel lining plate 1 and the silicon carbide pipe and a second sealing part 4 arranged between the second steel lining plate 2 and the silicon carbide pipe.
The combination of the metal tube plate and the PTFE coating ensures the structural strength of the tube plate and the corrosion resistance; the adhesion between the tetrafluoro coating and the metal tube plate is enhanced by arranging the first fixing piece and the second fixing piece, the tetrafluoro coating is prevented from being peeled off, the gap 52 is arranged between the support plate 3 and the first steel liner plate 1 and is communicated with the pressure gauge 53, and the condition of medium leakage can be timely found out when the pressure in the gap 52 and the original pressure change under the condition of medium leakage; because the tube plates in the prior art are attached together, if the medium leaks, the end parts of all the silicon carbide tubes are stained with the medium, and the specific sealing leakage of which silicon carbide tube or which silicon carbide tubes cannot be found in time, so that the silicon carbide tubes are required to be replaced completely, and the specific leakage silicon carbide tubes can be found after the gap 52 exists, so that the replacement and maintenance efficiency is improved, and the workload is reduced.
The bulge 51 is an annular step surrounding the circumference of one side of the support plate 3, a sealing ring is arranged between the bulge 51 and the first steel liner plate 1, and a sealing ring is also arranged between the support plate 3 and the second steel liner plate 2 to prevent the medium from leaking. Drain 54 is a tap or valve in communication with gap 52.
As shown in fig. 3 and 4, the first steel liner plate 1 includes a steel liner 11 and a tetrafluoro coating 12, the steel liner 11 includes a contact portion 111 and a fixing portion 112, the fixing portion 112 is disposed around the contact portion 111, a plurality of fixing holes 113 are regularly distributed on the fixing portion 112, a plurality of mounting holes 114 are regularly disposed on the contact portion 111, and the tetrafluoro coating 12 covers the outer sides of the contact portion 111 and the mounting holes 114. The steel lining 11 is coated with the tetrafluoro coating 12, so that the structural strength of the tube plate and the corrosion resistance are guaranteed. And the production cost is far lower than that of the PTFE tube plate, the processing and production difficulty is lower than that of an enamel tube plate, the yield is high, and waste is not easy to cause.
As shown in fig. 5, a first fixing member 115 is provided between the contact portion 111 and the tetrafluoro coating 12, and a second fixing member 116 is provided between the mounting hole 114 and the tetrafluoro coating 12. The adhesion between the tetrafluoro coating 12 and the metal tube sheet is enhanced by providing the first fixture 115 and the second fixture 116, and the tetrafluoro coating 12 is prevented from being peeled off.
As shown in fig. 6, the first fixing member 115 is provided with at least one, and the first fixing member 115 is a groove in which the width of the notch provided on the contact portion 111 is smaller than the width of the groove bottom. Such a groove enhances adhesion between the tetrafluoro coating 12 and the metal tube sheet, and prevents the tetrafluoro coating 12 from being peeled off. In the working process, the pressure is still high under the condition that the contact surface of the tetrafluoro and the heat exchanger has higher temperature, so that the adhesion between the tetrafluoro coating 12 and the metal tube plate needs to be increased by utilizing the first fixing frame.
The first fixing member 115 is preferably a T-shaped groove provided on the contact portion 111. Because there is great right-angle side in the bottom in T-slot to make anti peel force improve greatly, but because the tube sheet is circular in the course of working, so the processing degree of difficulty of production T-slot can increase.
The first fixing member 115 is preferably a dovetail groove provided in the contact portion 111. The bottom of the dovetail groove and the notch part have larger bevel edges so that the stripping resistance is greatly improved, but the bevel edges are smaller than the T-shaped groove, and the processing difficulty of the dovetail groove is smaller than that of the T-shaped groove. Although other irregular grooves are provided, the T-shaped groove and the dovetail groove are preferably selected, and the T-shaped groove or the dovetail groove can be selected to be used according to the requirement of the peeling resistance in specific use, and even the T-shaped groove or the dovetail groove and a plurality of T-shaped grooves or dovetail grooves are used simultaneously.
As shown in fig. 7, the second fixing member 116 is a regular and/or irregular protrusion 51 radially disposed along the mounting hole 114. By using the protrusions 51 radially arranged in the mounting holes 114, the contact area between the tetrafluoro coating 12 and the mounting holes 114 is firstly increased, and the blocking and anti-stripping effects of the radial protrusions 51 of the mounting holes 114 on the second tetrafluoro coating 12 are better.
The second fixing member 116 is preferably provided with an isosceles trapezoid projection 51 along the radial direction of the mounting hole 114. By using the protrusions 51 radially arranged in the mounting holes 114, the contact area between the tetrafluoro coating 12 and the mounting holes 114 is firstly increased, and the blocking and anti-stripping effects of the radial protrusions 51 of the mounting holes 114 on the second tetrafluoro coating 12 are better.
As shown in fig. 8, the second fixing member 116 is preferably provided with an isosceles triangle projection 51 along the radial direction of the mounting hole 114. When the second fixing member 116 is an equilateral triangle, the contact area between the tetrafluoro coating 12 and the mounting hole 114 is doubled, and the anti-peeling effect is better.
The thickness of the tetrafluoro coating layer 12 is 2 to 5 mm. So as to obtain better corrosion prevention effect and save raw materials.
The combination of the metal tube plate and the PTFE coating 12 ensures the structural strength of the tube plate and the corrosion resistance; the adhesion between the tetrafluoro coating 12 and the metal tube sheet is enhanced by providing the first fixture 115 and the second fixture 116, and the tetrafluoro coating 12 is prevented from being peeled off.
The first steel liner plate 1 and the second steel liner plate 2 have the same structure.
As shown in fig. 9, the first sealing portion 41 includes a tetrafluoro washer, an O-ring, a tetrafluoro washer, a soft tetrafluoro filler, an O-ring, and a first sealing head, which are sequentially disposed in a direction away from the support plate 3, the first sealing head abuts against the support plate 3, the second sealing portion 42 includes a tetrafluoro washer, an O-ring, a tetrafluoro washer, a soft tetrafluoro filler, an O-ring, and a second sealing head, which are sequentially disposed in a direction close to the support plate 3, and the second sealing head is in threaded connection with the second steel bushing plate 2.
The foregoing is only a few embodiments of the present invention, and it should be noted that, for those skilled in the art, other modifications and improvements can be made without departing from the inventive concept of the present invention, and all of them belong to the protection scope of the present invention.
Claims (10)
1. Silicon carbide heat exchanger steel lining tetrafluoro tube sheet sealing device, its characterized in that includes first steel lining tube sheet, second steel lining tube sheet, backup pad, sealing and leak hunting portion, the backup pad sets up between first steel lining tube sheet and second steel lining tube sheet, leak hunting portion sets up in the backup pad, leak hunting portion includes that the edge of backup pad and first steel lining tube sheet contact is equipped with the arch to and form the clearance between protruding and the first steel lining tube sheet, the backup pad top is equipped with the detection pipeline, the one end intercommunication clearance of detection pipeline, the manometer is connected to the other end of detection pipeline, the bottom of backup pad is equipped with drain portion, the sealing is including establishing the first sealing between first steel lining tube sheet and carborundum pipe and establishing the second sealing between second steel lining tube sheet and carborundum pipe.
2. The silicon carbide heat exchanger steel lining tetrafluoro tube sheet sealing device according to claim 1, wherein the first steel lining plate comprises a steel lining and a tetrafluoro coating, the steel lining comprises a contact part and a fixing part, the fixing part is arranged around the contact part, a plurality of fixing holes are regularly distributed on the fixing part, a plurality of mounting holes are regularly arranged on the contact part, the tetrafluoro coating covers the outer sides of the contact part and the mounting holes, a first fixing part is arranged between the contact part and the tetrafluoro coating, and a second fixing part is arranged between the mounting holes and the tetrafluoro coating.
3. The silicon carbide heat exchanger steel-lined tetrafluoro-tube sheet sealing device as claimed in claim 2, wherein the first fixture is provided with at least one, and the first fixture is a groove provided on the contact portion with a notch having a width smaller than a groove bottom width.
4. The silicon carbide heat exchanger steel liner tetrafluoro tube sheet sealing device according to claim 3, wherein the first fixing member is preferably a T-shaped groove provided on the contact portion.
5. The silicon carbide heat exchanger steel liner tetrafluoro tube sheet sealing device according to claim 3, wherein the first fixing member is preferably a dovetail groove provided on the contact portion.
6. The silicon carbide heat exchanger steel lining tetrafluoro tube sheet sealing device according to claim 2, wherein the second fixing member is a regular and/or irregular projection provided radially along the mounting hole.
7. The silicon carbide heat exchanger steel lining tetrafluoro tube plate sealing device as claimed in claim 6, wherein the second fixing member is preferably provided with an isosceles trapezoid projection along a radial direction of the mounting hole.
8. The silicon carbide heat exchanger steel lining tetrafluoro tube plate sealing device as claimed in claim 6, wherein the second fixing member is preferably provided with isosceles triangle projections along the radial direction of the mounting hole.
9. The silicon carbide heat exchanger steel lining tetrafluoro tube sheet sealing device as claimed in claim 1, wherein the first steel lining tube sheet and the second steel lining tube sheet are identical in structure.
10. The silicon carbide heat exchanger steel lining tetrafluoro tube plate sealing device as claimed in claim 1, wherein the first sealing portion comprises a tetrafluoro washer, an O-ring, a tetrafluoro washer, a soft tetrafluoro filler, an O-ring and a first end socket which are sequentially arranged in a direction away from the supporting plate, the first end socket abuts against the supporting plate, the second sealing portion comprises a tetrafluoro washer, an O-ring, a tetrafluoro washer, a soft tetrafluoro filler, an O-ring and a second end socket which are sequentially arranged in a direction close to the supporting plate, and the second end socket is in threaded connection with the second steel lining plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920462880.2U CN210089479U (en) | 2019-04-08 | 2019-04-08 | Steel lining tetrafluoro tube plate sealing device for silicon carbide heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920462880.2U CN210089479U (en) | 2019-04-08 | 2019-04-08 | Steel lining tetrafluoro tube plate sealing device for silicon carbide heat exchanger |
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| Publication Number | Publication Date |
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| CN210089479U true CN210089479U (en) | 2020-02-18 |
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| CN201920462880.2U Active CN210089479U (en) | 2019-04-08 | 2019-04-08 | Steel lining tetrafluoro tube plate sealing device for silicon carbide heat exchanger |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111678363A (en) * | 2020-07-10 | 2020-09-18 | 贵州兰鑫石墨机电设备制造有限公司 | Double-tube-plate silicon carbide heat exchanger with single-plate double-seal structure |
| CN113865408A (en) * | 2020-06-30 | 2021-12-31 | 中国科学院广州能源研究所 | Plastic sealing element structure |
-
2019
- 2019-04-08 CN CN201920462880.2U patent/CN210089479U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113865408A (en) * | 2020-06-30 | 2021-12-31 | 中国科学院广州能源研究所 | Plastic sealing element structure |
| CN113865408B (en) * | 2020-06-30 | 2024-04-02 | 中国科学院广州能源研究所 | Plastic sealing element structure |
| CN111678363A (en) * | 2020-07-10 | 2020-09-18 | 贵州兰鑫石墨机电设备制造有限公司 | Double-tube-plate silicon carbide heat exchanger with single-plate double-seal structure |
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