CN111288835B - Prefabricated joint type fluoroplastic heat exchange tube and tube plate connecting structure and installation method - Google Patents
Prefabricated joint type fluoroplastic heat exchange tube and tube plate connecting structure and installation method Download PDFInfo
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- CN111288835B CN111288835B CN202010284501.2A CN202010284501A CN111288835B CN 111288835 B CN111288835 B CN 111288835B CN 202010284501 A CN202010284501 A CN 202010284501A CN 111288835 B CN111288835 B CN 111288835B
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- tube
- heat exchange
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- exchange tube
- plate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/04—Arrangements for sealing elements into header boxes or end plates
- F28F9/06—Arrangements for sealing elements into header boxes or end plates by dismountable joints
- F28F9/10—Arrangements for sealing elements into header boxes or end plates by dismountable joints by screw-type connections, e.g. gland
Abstract
The invention discloses a prefabricated joint type fluoroplastic heat exchange tube and tube plate connecting structure and a mounting method, wherein the structure comprises a metal tube plate, and a heat exchange tube mounting hole is formed in the metal tube plate; the upper surface and the lower surface of the metal tube plate are respectively covered with a layer of PTFE base plate, a heat exchange tube mounting hole on the metal tube plate penetrates through the upper PTFE base plate and the lower PTFE base plate, and a heat exchange tube is arranged in the heat exchange tube mounting hole. The invention does not need PTFE welding, greatly saves labor cost, and adopts a metal tube expansion mode to fix the heat exchange tube supporting tube, so that the fixation is safer and firmer. The invention prefabricates the heat exchange tubes and the joints, can be produced in batch by using a tube expanding machine, only needs to penetrate the tubes for fixing during installation, has simple operation, ensures the product quality and saves labor.
Description
Technical Field
The invention relates to a fluoroplastic heat exchange tube and tube plate connecting structure and an installation method.
Background
The fixing mode of the traditional heat exchange tube and the tube plate is as follows: and (4) connecting the tetrafluoro pipe with a tetrafluoro base plate on the pipe plate by adopting tetrafluoro welding. The welding requirement is extremely high, the connecting surface is small, and the pipe is easy to fall off after long-term use. The fixing mode of the traditional heat exchange tube and the tube plate is as follows: the heat exchange tube and the tube plate are directly fixed by adopting a tube expansion mode. The heat exchange tube has the advantages that the groove needs to be formed in the mounting hole in the tube plate, machining precision is high, the thickness of the tube plate needs to be increased, the tube expansion is manually operated on the tube plate after the heat exchange tube is penetrated on the tube plate, operation difficulty is high, and quality is unstable.
Disclosure of Invention
The invention aims to provide a prefabricated joint type fluoroplastic heat exchange tube and tube plate connecting structure which is safe to fix and simple to operate and an installation method.
The technical solution of the invention is as follows:
the utility model provides a prefabricated joint formula fluoroplastics heat exchange tube and tube sheet connection structure, characterized by: the heat exchange tube comprises a metal tube plate, wherein a heat exchange tube mounting hole is formed in the metal tube plate; the upper surface and the lower surface of the metal tube plate are respectively covered with a layer of PTFE base plate, a heat exchange tube mounting hole on the metal tube plate penetrates through the upper PTFE base plate and the lower PTFE base plate, and a heat exchange tube is mounted in the heat exchange tube mounting hole;
the heat exchange tube is a prefabricated joint type fluoroplastic heat exchange tube and comprises a metal support tube, wherein the lower part of the metal support tube is provided with threads, and the inner wall of the metal support tube is provided with an upper groove and a lower groove; a boss is formed on the upper edge of the metal supporting tube through a folded edge, and a plurality of positioning pin holes are formed on the lower edge of the boss;
the inner side of the metal supporting tube is provided with a tetrafluoro protection tube, the lower part of the tetrafluoro protection tube is longer than the metal supporting tube, and the upper edge of the tetrafluoro protection tube is tightly attached to a boss of the metal supporting tube;
the inner side of the polytetrafluoroethylene protection tube is provided with a fluoroplastic heat exchange tube, the upper edge of the fluoroplastic heat exchange tube is provided with a flanging which is tightly attached to the upper edge flanging of the polytetrafluoroethylene protection tube, and the bottom end of the fluoroplastic heat exchange tube is flanged for limiting and fixing the bottom;
the inner side of the fluoroplastic heat exchange tube is provided with a metal expansion tube, the upper edge of the fluoroplastic heat exchange tube and the upper edge of the tetrafluoro protection tube are wrapped by the flanging of the upper edge of the metal expansion tube, the lower edge of the metal expansion tube is shorter than the tetrafluoro protection tube and longer than the metal supporting tube, and the part longer than the metal supporting tube inclines inwards to ensure that the edge of the metal expansion tube does not touch the heat exchange tube;
a flat nut is screwed at the lower thread of the metal supporting tube, a plurality of symmetrical power-assisted holes are formed in the flat nut and used for screwing the nut during installation, and a sealing gasket is arranged between the flat nut and a lower polytetrafluoroethylene base plate on the metal tube plate;
the positioning pin is arranged in the positioning pin hole, the upper part of the positioning pin is contacted with the boss of the metal supporting tube, and the lower part of the positioning pin is contacted with the upper PTFE base plate on the metal tube plate, so that the positioning pin plays a role in limiting and fixing;
when the prefabricated joint type fluoroplastic heat exchange tube is installed, the whole prefabricated joint type fluoroplastic heat exchange tube penetrates through the heat exchange tube installation hole, the flat nut is screwed towards the direction of the metal tube plate, and the prefabricated joint type fluoroplastic heat exchange tube is tightly sealed with the metal tube plate, the upper PTFE base plate, the lower PTFE base plate and the sealing washer.
A method for installing a connection structure of a prefabricated joint type fluoroplastic heat exchange tube and a tube plate is characterized by comprising the following steps: the connecting structure comprises a metal tube plate, and a heat exchange tube mounting hole is formed in the metal tube plate; the upper surface and the lower surface of the metal tube plate are respectively covered with a layer of PTFE base plate, a heat exchange tube mounting hole on the metal tube plate penetrates through the upper PTFE base plate and the lower PTFE base plate, and a heat exchange tube is mounted in the heat exchange tube mounting hole;
the heat exchange tube is a prefabricated joint type fluoroplastic heat exchange tube and comprises a metal support tube, wherein the lower part of the metal support tube is provided with threads, and the inner wall of the metal support tube is provided with an upper groove and a lower groove; a boss is formed on the upper edge of the metal supporting tube through a folded edge, and a plurality of positioning pin holes are formed on the lower edge of the boss;
the inner side of the metal supporting tube is provided with a tetrafluoro protection tube, the lower part of the tetrafluoro protection tube is longer than the metal supporting tube, and the upper edge of the tetrafluoro protection tube is tightly attached to a boss of the metal supporting tube;
the inner side of the polytetrafluoroethylene protection tube is provided with a fluoroplastic heat exchange tube, the upper edge of the fluoroplastic heat exchange tube is provided with a flanging which is tightly attached to the upper edge flanging of the polytetrafluoroethylene protection tube, and the bottom end of the fluoroplastic heat exchange tube is flanged for limiting and fixing the bottom;
the inner side of the fluoroplastic heat exchange tube is provided with a metal expansion tube, the upper edge of the fluoroplastic heat exchange tube and the upper edge of the tetrafluoro protection tube are wrapped by the flanging of the upper edge of the metal expansion tube, the lower edge of the metal expansion tube is shorter than the tetrafluoro protection tube and longer than the metal supporting tube, and the part longer than the metal supporting tube inclines inwards to ensure that the edge of the metal expansion tube does not touch the heat exchange tube;
a flat nut is screwed at the lower thread of the metal supporting tube, a plurality of symmetrical power-assisted holes are formed in the flat nut and used for screwing the nut during installation, and a sealing gasket is arranged between the flat nut and a lower polytetrafluoroethylene base plate on the metal tube plate;
the positioning pin is arranged in the positioning pin hole, the upper part of the positioning pin is contacted with the boss of the metal supporting tube, and the lower part of the positioning pin is contacted with the upper PTFE base plate on the metal tube plate, so that the positioning pin plays a role in limiting and fixing;
when the prefabricated joint type fluoroplastic heat exchange tube is installed, the whole prefabricated joint type fluoroplastic heat exchange tube penetrates through the heat exchange tube installation hole, the flat nut is screwed towards the direction of the metal tube plate, and the prefabricated joint type fluoroplastic heat exchange tube is tightly sealed with the metal tube plate, the upper PTFE base plate, the lower PTFE base plate and the sealing washer.
The invention does not need PTFE welding, greatly saves labor cost, and adopts a metal tube expansion mode to fix the heat exchange tube supporting tube, so that the fixation is safer and firmer. The invention prefabricates the heat exchange tubes and the joints, can be produced in batch by using a tube expanding machine, only needs to penetrate the tubes for fixing during installation, has simple operation, ensures the product quality and saves labor.
Drawings
The invention is further illustrated by the following figures and examples.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
A prefabricated joint type fluoroplastic heat exchange tube and tube plate connecting structure comprises a metal tube plate 7, wherein a heat exchange tube mounting hole is formed in the metal tube plate; the upper surface and the lower surface of the metal tube plate are respectively covered with a layer of PTFE base plate, a heat exchange tube mounting hole on the metal tube plate penetrates through the upper PTFE base plate 8 and the lower PTFE base plate 9, and a heat exchange tube is mounted in the heat exchange tube mounting hole;
the heat exchange tube is a prefabricated joint type fluoroplastic heat exchange tube and comprises a metal support tube 1, wherein the lower part of the metal support tube is provided with threads 1-1, and the inner wall of the metal support tube is provided with upper grooves 1-2 and lower grooves 1-3; a boss 1-4 is formed on the upper edge of the metal supporting tube, and a plurality of positioning pin holes 1-4-1 are uniformly distributed on the lower edge of the boss;
the inner side of the metal supporting tube is provided with a tetrafluoro protection tube 2, the lower part of the tetrafluoro protection tube is longer than the metal supporting tube, and the upper edge of the tetrafluoro protection tube is tightly attached to a boss 1-4 of the metal supporting tube along a flanging 2-1;
a fluoroplastic heat exchange tube 3 is arranged on the inner side of the polytetrafluoroethylene protection tube, a folded edge 3-1 is arranged on the upper edge of the fluoroplastic heat exchange tube and is tightly attached to a folded edge 2-1 on the upper edge of the polytetrafluoroethylene protection tube, and a folded edge 3-2 is arranged at the bottom end of the fluoroplastic heat exchange tube and is used for limiting and fixing the bottom;
the inner side of the fluoroplastic heat exchange tube is provided with a metal expansion tube 4, the upper edge of the fluoroplastic heat exchange tube and the upper edge of the tetrafluoro protection tube are wrapped by a metal expansion tube upper edge flanging 4-1, the lower edge of the metal expansion tube is shorter than the tetrafluoro protection tube and longer than the metal supporting tube, and the part longer than the metal supporting tube inclines inwards to ensure that the edge of the metal expansion tube does not touch the heat exchange tube;
a flat nut 5 is screwed at the lower thread of the metal supporting tube, a plurality of symmetrical boosting holes 5-1 are formed in the flat nut and used for screwing the nut during installation, and a sealing gasket 10 is arranged between the flat nut and a lower polytetrafluoroethylene base plate 9 on the metal tube plate;
the positioning pin 6 is arranged in the positioning pin hole 1-4-1, the upper part of the positioning pin is contacted with the boss 1-4 of the metal supporting tube, and the lower part of the positioning pin is contacted with the upper PTFE base plate 8 on the metal tube plate, so that the limiting and fixing effects are realized;
when the prefabricated joint type fluoroplastic heat exchange tube is installed, the whole prefabricated joint type fluoroplastic heat exchange tube penetrates through a heat exchange tube installation hole, the flat nut is screwed towards the direction of the metal tube plate 7, and the prefabricated joint type fluoroplastic heat exchange tube is tightly sealed with the metal tube plate 7, the upper and lower PTFE base plates 8 and 9 and the sealing washer 10.
Claims (2)
1. The utility model provides a prefabricated joint formula fluoroplastics heat exchange tube and tube sheet connection structure, characterized by: the heat exchange tube comprises a metal tube plate, wherein a heat exchange tube mounting hole is formed in the metal tube plate; the upper surface and the lower surface of the metal tube plate are respectively covered with a layer of PTFE base plate, a heat exchange tube mounting hole on the metal tube plate penetrates through the upper PTFE base plate and the lower PTFE base plate, and a heat exchange tube is mounted in the heat exchange tube mounting hole;
the heat exchange tube is a prefabricated joint type fluoroplastic heat exchange tube and comprises a metal support tube, wherein the lower part of the metal support tube is provided with threads, and the inner wall of the metal support tube is provided with an upper groove and a lower groove; a boss is formed on the upper edge of the metal supporting tube through a folded edge, and a plurality of positioning pin holes are formed on the lower edge of the boss;
the inner side of the metal supporting tube is provided with a tetrafluoro protection tube, the lower part of the tetrafluoro protection tube is longer than the metal supporting tube, and the upper edge of the tetrafluoro protection tube is tightly attached to a boss of the metal supporting tube;
the inner side of the polytetrafluoroethylene protection tube is provided with a fluoroplastic heat exchange tube, the upper edge of the fluoroplastic heat exchange tube is provided with a flanging which is tightly attached to the upper edge flanging of the polytetrafluoroethylene protection tube, and the bottom end of the fluoroplastic heat exchange tube is flanged for limiting and fixing the bottom;
the inner side of the fluoroplastic heat exchange tube is provided with a metal expansion tube, the upper edge of the fluoroplastic heat exchange tube and the upper edge of the tetrafluoro protection tube are wrapped by the flanging of the upper edge of the metal expansion tube, the lower edge of the metal expansion tube is shorter than the tetrafluoro protection tube and longer than the metal supporting tube, and the part longer than the metal supporting tube inclines inwards to ensure that the edge of the metal expansion tube does not touch the heat exchange tube;
a flat nut is screwed at the lower thread of the metal supporting tube, a plurality of symmetrical power-assisted holes are formed in the flat nut and used for screwing the nut during installation, and a sealing gasket is arranged between the flat nut and a lower polytetrafluoroethylene base plate on the metal tube plate;
the positioning pin is arranged in the positioning pin hole, the upper part of the positioning pin is contacted with the boss of the metal supporting tube, and the lower part of the positioning pin is contacted with the upper PTFE base plate on the metal tube plate, so that the positioning pin plays a role in limiting and fixing;
when the prefabricated joint type fluoroplastic heat exchange tube is installed, the whole prefabricated joint type fluoroplastic heat exchange tube penetrates through the heat exchange tube installation hole, the flat nut is screwed towards the direction of the metal tube plate, and the prefabricated joint type fluoroplastic heat exchange tube is tightly sealed with the metal tube plate, the upper PTFE base plate, the lower PTFE base plate and the sealing washer.
2. A method for installing a connection structure of a prefabricated joint type fluoroplastic heat exchange tube and a tube plate according to claim 1, which is characterized in that: the connecting structure comprises a metal tube plate, and a heat exchange tube mounting hole is formed in the metal tube plate; the upper surface and the lower surface of the metal tube plate are respectively covered with a layer of PTFE base plate, a heat exchange tube mounting hole on the metal tube plate penetrates through the upper PTFE base plate and the lower PTFE base plate, and a heat exchange tube is mounted in the heat exchange tube mounting hole;
the heat exchange tube is a prefabricated joint type fluoroplastic heat exchange tube and comprises a metal support tube, wherein the lower part of the metal support tube is provided with threads, and the inner wall of the metal support tube is provided with an upper groove and a lower groove; a boss is formed on the upper edge of the metal supporting tube through a folded edge, and a plurality of positioning pin holes are formed on the lower edge of the boss;
the inner side of the metal supporting tube is provided with a tetrafluoro protection tube, the lower part of the tetrafluoro protection tube is longer than the metal supporting tube, and the upper edge of the tetrafluoro protection tube is tightly attached to a boss of the metal supporting tube;
the inner side of the polytetrafluoroethylene protection tube is provided with a fluoroplastic heat exchange tube, the upper edge of the fluoroplastic heat exchange tube is provided with a flanging which is tightly attached to the upper edge flanging of the polytetrafluoroethylene protection tube, and the bottom end of the fluoroplastic heat exchange tube is flanged for limiting and fixing the bottom;
the inner side of the fluoroplastic heat exchange tube is provided with a metal expansion tube, the upper edge of the fluoroplastic heat exchange tube and the upper edge of the tetrafluoro protection tube are wrapped by the flanging of the upper edge of the metal expansion tube, the lower edge of the metal expansion tube is shorter than the tetrafluoro protection tube and longer than the metal supporting tube, and the part longer than the metal supporting tube inclines inwards to ensure that the edge of the metal expansion tube does not touch the heat exchange tube;
a flat nut is screwed at the lower thread of the metal supporting tube, a plurality of symmetrical power-assisted holes are formed in the flat nut and used for screwing the nut during installation, and a sealing gasket is arranged between the flat nut and a lower polytetrafluoroethylene base plate on the metal tube plate;
the positioning pin is arranged in the positioning pin hole, the upper part of the positioning pin is contacted with the boss of the metal supporting tube, and the lower part of the positioning pin is contacted with the upper PTFE base plate on the metal tube plate, so that the positioning pin plays a role in limiting and fixing;
when the prefabricated joint type fluoroplastic heat exchange tube is installed, the whole prefabricated joint type fluoroplastic heat exchange tube penetrates through the heat exchange tube installation hole, the flat nut is screwed towards the direction of the metal tube plate, and the prefabricated joint type fluoroplastic heat exchange tube is tightly sealed with the metal tube plate, the upper PTFE base plate, the lower PTFE base plate and the sealing washer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010284501.2A CN111288835B (en) | 2020-04-13 | 2020-04-13 | Prefabricated joint type fluoroplastic heat exchange tube and tube plate connecting structure and installation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010284501.2A CN111288835B (en) | 2020-04-13 | 2020-04-13 | Prefabricated joint type fluoroplastic heat exchange tube and tube plate connecting structure and installation method |
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| Publication Number | Publication Date |
|---|---|
| CN111288835A CN111288835A (en) | 2020-06-16 |
| CN111288835B true CN111288835B (en) | 2021-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010284501.2A Active CN111288835B (en) | 2020-04-13 | 2020-04-13 | Prefabricated joint type fluoroplastic heat exchange tube and tube plate connecting structure and installation method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19536300C1 (en) * | 1995-09-29 | 1997-04-03 | Balcke Duerr Gmbh | Heat exchanger with at least one metallic tube plate |
| CN204963654U (en) * | 2015-07-22 | 2016-01-13 | 沃斯坦热力设备（天津）有限公司 | A tube sheet assembly structure for hydrophily jie's fluoroplastics gas gas heater |
| CN205482515U (en) * | 2016-01-29 | 2016-08-17 | 浙江东氟塑料科技有限公司 | Heat exchange tube location structure of roof |
| CN206787369U (en) * | 2017-04-28 | 2017-12-22 | 上海金由氟材料股份有限公司 | PTFE tube ends fixed structure in a kind of heat exchanger |
| CN207889164U (en) * | 2017-12-25 | 2018-09-21 | 浙江鼎诚环保科技有限公司 | A kind of fluoroplastics exchanger tubes and tubesheets connection structure |
-
2020
- 2020-04-13 CN CN202010284501.2A patent/CN111288835B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19536300C1 (en) * | 1995-09-29 | 1997-04-03 | Balcke Duerr Gmbh | Heat exchanger with at least one metallic tube plate |
| CN204963654U (en) * | 2015-07-22 | 2016-01-13 | 沃斯坦热力设备（天津）有限公司 | A tube sheet assembly structure for hydrophily jie's fluoroplastics gas gas heater |
| CN205482515U (en) * | 2016-01-29 | 2016-08-17 | 浙江东氟塑料科技有限公司 | Heat exchange tube location structure of roof |
| CN206787369U (en) * | 2017-04-28 | 2017-12-22 | 上海金由氟材料股份有限公司 | PTFE tube ends fixed structure in a kind of heat exchanger |
| CN207889164U (en) * | 2017-12-25 | 2018-09-21 | 浙江鼎诚环保科技有限公司 | A kind of fluoroplastics exchanger tubes and tubesheets connection structure |
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| Publication number | Publication date |
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| CN111288835A (en) | 2020-06-16 |
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