CN211054239U - Tube plate processing die - Google Patents
Tube plate processing die Download PDFInfo
- Publication number
- CN211054239U CN211054239U CN201921881361.6U CN201921881361U CN211054239U CN 211054239 U CN211054239 U CN 211054239U CN 201921881361 U CN201921881361 U CN 201921881361U CN 211054239 U CN211054239 U CN 211054239U
- Authority
- CN
- China
- Prior art keywords
- tube plate
- fep composite
- die
- tube
- fep
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model relates to a tube sheet processing die, including tube sheet blank and the FEP composite bed of centre gripping in tube sheet blank both sides, the downside of FEP composite bed is equipped with the lower mould, the upside of FEP composite bed is equipped with the upper die, the equipartition has the flange hole on the outer fringe of tube sheet blank, and the position that upper die and lower mould correspond the flange hole is provided with the through-hole, and upper die, lower mould and tube sheet blank penetrate bolt fastening connection through-hole and flange hole; and a pressing plate is arranged in the middle of the upper die. Compared with the prior art, the beneficial effects of the utility model are that: 1. the sintering and die pressing process of the steel lining FEP composite tube plate fills the blank of the manufacturing technology of the tube plate of the silicon carbide heat exchanger in China, completely solves the problem of creep deformation of the tetrafluoro tube plate, and enables the silicon carbide heat exchanger to be used more stably and reliably. 2. The sintering and die pressing process of the steel lining FEP composite tube plate well combines the fluoroplastic and the carbon steel substrate together, and solves the problems that the adhesion force of the tetrafluoro material and the carbon steel substrate is not strong, the tetrafluoro material and the carbon steel substrate are easy to fall off and generate cracks.
Description
Technical Field
The utility model relates to a compound tube sheet processing technology field, specific tube sheet mold processing that says so.
Background
The silicon carbide has extremely high corrosion resistance, oxidation resistance and erosion resistance, can resist high-concentration sulfuric acid, nitric acid, phosphoric acid, mixed acid, strong base, oxidant and the like, is the only ceramic material capable of resisting the corrosion of hydrofluoric acid, and has long service life.
The silicon carbide heat exchanger as a novel material applied to the manufacture of chemical equipment is not widely popularized yet, the manufacturing technology of the silicon carbide heat exchanger is not mature enough, and particularly, the sealing form between the silicon carbide heat exchange tube and the tube plate of the heat exchanger has defects, so that the application of the silicon carbide heat exchanger under the working conditions of higher temperature and pressure is limited. Although the polytetrafluoroethylene tube plate can resist corrosion of most acid and alkali and is a reliable anticorrosive material, the mechanical strength of polytetrafluoroethylene at high temperature is greatly reduced, and compared with a metal material, the polytetrafluoroethylene has much higher expansion rate and creep property, and is easy to deform at high temperature, so that the sealing effect is not ideal; meanwhile, the silicon carbide heat exchange tube is easily extruded and broken in the process of shrinking and deforming the polytetrafluoroethylene tube plate. The inevitable after-sale problem of the silicon carbide heat exchanger caused by the deformation of the polytetrafluoroethylene tube plate causes the damage of the used equipment, greatly increases the manufacturing cost of the silicon carbide heat exchanger, and influences the quality credit of customers on the silicon carbide heat exchanger.
How to increase the mechanical strength of the polytetrafluoroethylene tube plate and improve the use temperature of the polytetrafluoroethylene tube plate becomes a great problem in the manufacture of the silicon carbide heat exchanger. FEP is formed by copolymerizing tetrafluoroethylene and hexafluoropropylene, the content of hexafluoropropylene is about 15%, and the FEP is a modified material of polytetrafluoroethylene; FEP has the characteristics similar to those of polytetrafluoroethylene and has good processability of thermoplastic plastics, so that the FEP makes up the defect of difficult processing of the polytetrafluoroethylene and becomes a material for replacing the polytetrafluoroethylene. The steel lining FEP composite tube plate can greatly improve the service pressure and the service temperature of the tube plate of the heat exchanger, and better promote the application and popularization of the silicon carbide heat exchanger in the chemical industry.
When adding a reinforced steel part into the existing molded polytetrafluoroethylene tube plate, the reinforced steel part needs to be completely embedded into polytetrafluoroethylene powder for mold pressing and then demolding and sintering at high temperature; because the reinforced steel part is completely embedded in the polytetrafluoroethylene, the reference level and the positioning center of tube plate turning cannot be accurately found, and tube plates are scrapped due to the fact that the base materials of the steel part are exposed easily by the aid of the turning drill pipe holes. After the polytetrafluoroethylene is subjected to die pressing sintering, the polytetrafluoroethylene and the carbon steel reinforcing piece have insufficient binding force due to different hot-up rates, and the polytetrafluoroethylene and the carbon steel reinforcing piece are easy to peel off at the joint to form cracks.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that exists among the above-mentioned prior art, the utility model provides a tube sheet processing mould and technology through designing novel mould, can let the flange hole portion of carbon steel base plate in the compound tube sheet of steel lining FEP can expose in the FEP composite bed outside, and numerical control processing can come accurate location through the flange hole, has solved the problem of the accurate processing of compound tube sheet. In addition, different from the cold-pressing and hot-sintering of the polytetrafluoroethylene of the die, the steel lining FEP composite tube plate is manufactured in a hot-pressing mode after hot-sintering. Because no steel lining FEP composite tube plate manufacturing experience exists in China, a set of sintering mould pressing process of the steel lining FEP composite tube plate is designed to manufacture the composite tube plate meeting the sealing requirement of the silicon carbide heat exchanger.
The utility model provides a technical scheme that its technical problem adopted is:
a tube plate processing die comprises a tube plate blank and FEP composite layers clamped on two sides of the tube plate blank, wherein a lower die is arranged on the lower side of the FEP composite layer, an upper die is arranged on the upper side of the FEP composite layer, flange holes are uniformly distributed in the outer edge of the tube plate blank, through holes are formed in the positions, corresponding to the flange holes, of the upper die and the lower die, and the upper die, the lower die and the tube plate blank are fixedly connected through bolts penetrating through the through holes and the flange holes; the middle part of the upper die is movably connected with a pressing plate for extruding the FEP composite layer and the tube plate blank to form the steel lining FEP composite tube plate, and the pressing plate is extruded by a die press so that the FEP composite layer and the tube plate blank are fused into the composite tube plate.
Further, go up the mould and the position of lower mould corresponding FEP composite bed is provided with the recess, and the recess degree of depth is less than the compound tube sheet side step height of shaping back steel lining FEP, the recess is the circular slot for carry out spacing fixed to FEP composite bed and tube sheet blank.
Preferably, the tube plate blank is disc-shaped and is made of carbon steel plate, stainless steel, alloy plate or aluminum plate.
Preferably, the FEP composite layer of the steel lining FEP composite tube plate can also adopt PFA or ETFE composite material.
A construction process of the tube plate processing die comprises the following construction steps:
a. the tube plate blank is attached to an FEP composite layer, the FEP composite layer is formed into two layers, the thickness of the thin plate is less than or equal to 10mm, and the end face of the tube plate which is formed by machining and compounded with the thin plate is correspondingly connected with the shell of the heat exchanger; the thickness of the thick plate is less than or equal to 50mm, the end face of the tube plate compounded with the thick plate after processing and forming is correspondingly connected with the end socket of the heat exchanger, and the tube plate is mainly used for contacting corrosive materials and exerting the corrosion resistance of the tube plate;
b. clamping the tube plate blank and the FEP composite layer by the upper and lower templates through bolts to form a clamping piece, and then feeding the clamping piece into a baking oven for heating;
b1, uniformly heating the furnace to 280 ℃, and consuming for 3 hours in the period;
b2, keeping the temperature of the oven at 280 ℃ for 3 hours;
b3, continuously and uniformly heating the oven to 330 ℃, wherein the time is 2 hours;
b4, preserving the heat of the oven at the temperature of 330 ℃ for N hours;
c. after sintering in a baking furnace, the FEP granules are in a semi-molten state and have no oxidation blackening phenomenon, and at the moment, in order to meet the requirement of mold pressing fluidity, the clamping piece is transferred to a mold press to start mold pressing work;
c1, operating the mould pressing machine to connect the stable pressing plate, and starting pressing work;
c2, uniformly pressurizing to 80barg/c square meter, and using for 5 hours in the period;
c3, keeping the mould press for 5h under the pressure of 80barg/c square meter;
c4, pressurizing for the second time to 120barg/c square meter, and using for 5 hours in the period;
c5, maintaining the mould press for N hours under the pressure of 120barg/c square meter;
d. naturally cooling to normal temperature and opening the die when the pressure is maintained for the required time;
e. and finally, carrying out finish machining by a demolding lathe to obtain the steel lining FEP composite tube plate required by the installation of the silicon carbide heat exchanger.
Preferably, the holding time in the step b4 is determined to be different according to different specifications of the molded steel lining FEP composite tube plate.
Preferably, the dwell time in the c5 step is determined to be different according to different specifications of the moulded steel lining FEP composite tube plate.
Preferably, in the pressurizing process of the step c, after the temperature is increased, the clamping piece is cooled by using a water mist spraying mold.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model provides a tube sheet mold processing and technology possesses following advantage:
1. the sintering and die pressing process of the steel lining FEP composite tube plate fills the blank of the manufacturing technology of the tube plate of the silicon carbide heat exchanger in China, completely solves the problem of creep deformation of the tetrafluoro tube plate, and enables the silicon carbide heat exchanger to be used more stably and reliably.
2. The sintering and die pressing process of the steel lining FEP composite tube plate well combines the fluoroplastic and the carbon steel substrate together, and solves the problems that the adhesion force of the tetrafluoro material and the carbon steel substrate is not strong, the tetrafluoro material and the carbon steel substrate are easy to fall off and generate cracks.
Drawings
The present invention will be further explained with reference to the drawings and examples.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a sintering temperature rise curve of the steel lining FEP composite tube plate of the present invention;
fig. 3 is a pressure curve of the steel lining FEP composite tube plate molding process of the present invention.
In the figure: 1. the manufacturing method comprises the following steps of a lower die, 2, an upper die, 3, a tube plate blank, 4, an FEP composite layer, 5, a pressing plate, 6, a flange hole, 7 and a bolt.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
Example one
As shown in fig. 1, the utility model relates to a tube sheet processing die, including tube sheet blank 3 and FEP composite layer 4 of centre gripping in tube sheet blank 3 both sides, the downside of FEP composite layer 4 is equipped with lower mould 1, the upside of FEP composite layer 4 is equipped with upper mould 2, the outer fringe of tube sheet blank 3 is equipped with flange hole 6 evenly, the position that upper mould 2 and lower mould 1 correspond to flange hole 6 is provided with the through-hole, upper mould 2, lower mould 1 and tube sheet blank 3 penetrate bolt 7 fastening connection through-hole and flange hole; the middle part of the upper die is movably connected with a pressing plate 5 used for extruding the FEP composite layer and the tube plate blank to form the steel lining FEP composite tube plate, and the pressing plate 5 is extruded by a die press machine, so that the FEP composite layer 4 and the tube plate blank 3 are fused into the composite tube plate.
Further, go up mould 2 and lower mould 1 and be provided with the recess corresponding to FEP composite bed 4's position, the recess degree of depth is less than the compound tube sheet side step height of shaping back steel lining FEP, the recess is the circular slot for carry out spacing fixed to FEP composite bed and tube sheet blank.
Preferably, the tube sheet blank 3 is disk-shaped and is a carbon steel substrate.
Preferably, the FEP composite layer 4 of the steel lining FEP composite tube sheet is FEP composite.
The construction process of the pipe plate processing die shown in fig. 2-3 comprises the following construction steps:
a. the tube plate blank is attached to an FEP composite layer, the FEP composite layer is formed into two layers, the thickness of the thin plate is 10mm, and the end face of the tube plate which is formed by machining and is compounded with the thin plate is correspondingly connected with a shell of the heat exchanger; the thick plate is 50mm thick, the end face of the tube plate compounded with the thick plate after processing and forming is correspondingly connected with the end socket of the heat exchanger, and the thick plate is mainly used for contacting with corrosive materials and exerting the corrosion resistance;
b. clamping the tube plate blank and the FEP composite layer by the upper and lower templates through bolts to form a clamping piece, and then feeding the clamping piece into a baking oven for heating;
b1, uniformly heating the furnace to 280 ℃, and consuming for 3 hours in the period;
b2, keeping the temperature of the oven at 280 ℃ for 3 hours;
b3, continuously and uniformly heating the oven to 330 ℃, wherein the time is 2 hours;
b4, keeping the temperature of the oven at 330 ℃ for 5 hours;
c. after sintering in a baking furnace, the FEP granules are in a semi-molten state and have no oxidation blackening phenomenon, and at the moment, in order to meet the requirement of mold pressing fluidity, the clamping piece is transferred to a mold press to start mold pressing work;
c1, operating the mould pressing machine to connect the stable pressing plate, and starting pressing work;
c2, uniformly pressurizing to 80barg/c square meter, and using for 5 hours in the period;
c3, keeping the mould press for 5h under the pressure of 80barg/c square meter;
c4, pressurizing for the second time to 120barg/c square meter, and using for 5 hours in the period;
c5, maintaining the mould press for 8 hours under the pressure of 120barg/c square meter;
d. naturally cooling to normal temperature and opening the die when the pressure is maintained for the required time;
e. and finally, carrying out finish machining by a demolding lathe to obtain the steel lining FEP composite tube plate required by the installation of the silicon carbide heat exchanger.
Example two
The construction process of the pipe plate processing die shown in fig. 2-3 comprises the following construction steps:
a. the tube plate blank is attached to an FEP composite layer, the FEP composite layer is formed into two layers, the thickness of the thin plate is 2mm, and the end face of the tube plate which is formed by machining and is compounded with the thin plate is correspondingly connected with a shell of the heat exchanger; the thick plate is 5mm thick, the end face of the tube plate compounded with the thick plate after processing and forming is correspondingly connected with the end socket of the heat exchanger, and the thick plate is mainly used for contacting with corrosive materials and exerting the corrosion resistance;
b. clamping the tube plate blank and the FEP composite layer by the upper and lower templates through bolts to form a clamping piece, and then feeding the clamping piece into a baking oven for heating;
b1, uniformly heating the furnace to 280 ℃, and consuming for 3 hours in the period;
b2, keeping the temperature of the oven at 280 ℃ for 3 hours;
b3, continuously and uniformly heating the oven to 330 ℃, wherein the time is 2 hours;
b4, keeping the temperature of the oven at 330 ℃ for 2 hours;
c. after sintering in a baking furnace, the FEP granules are in a semi-molten state and have no oxidation blackening phenomenon, and at the moment, in order to meet the requirement of mold pressing fluidity, the clamping piece is transferred to a mold press to start mold pressing work;
c1, operating the mould pressing machine to connect the stable pressing plate, and starting pressing work;
c2, uniformly pressurizing to 80barg/c square meter, and using for 5 hours in the period;
c3, keeping the mould press for 5h under the pressure of 80barg/c square meter;
c4, pressurizing for the second time to 120barg/c square meter, and using for 5 hours in the period;
c5, maintaining the mould press for 3 hours under the pressure of 120barg/c square meter;
d. naturally cooling to normal temperature and opening the die when the pressure is maintained for the required time;
e. and finally, carrying out finish machining by a demolding lathe to obtain the steel lining FEP composite tube plate required by the installation of the silicon carbide heat exchanger.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (2)
1. The tube plate processing die is characterized by comprising a tube plate blank and FEP composite layers clamped on two sides of the tube plate blank, wherein a lower die is arranged on the lower side of the FEP composite layer, an upper die is arranged on the upper side of the FEP composite layer, flange holes are uniformly distributed in the outer edge of the tube plate blank, through holes are formed in the positions, corresponding to the flange holes, of the upper die and the lower die, and the upper die, the lower die and the tube plate blank are fixedly connected through bolts penetrating through the through holes and the flange holes;
and the middle part of the upper die is movably connected with a pressing plate for extruding the FEP composite layer and the pipe plate blank to form the steel lining FEP composite pipe plate.
2. The tube plate processing die of claim 1, wherein the upper die and the lower die are provided with grooves at positions corresponding to the FEP composite layer, and the depth of the groove is smaller than the height of the step on the side surface of the formed steel lining FEP composite tube plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921881361.6U CN211054239U (en) | 2019-11-04 | 2019-11-04 | Tube plate processing die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921881361.6U CN211054239U (en) | 2019-11-04 | 2019-11-04 | Tube plate processing die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211054239U true CN211054239U (en) | 2020-07-21 |
Family
ID=71592652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921881361.6U Expired - Fee Related CN211054239U (en) | 2019-11-04 | 2019-11-04 | Tube plate processing die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211054239U (en) |
-
2019
- 2019-11-04 CN CN201921881361.6U patent/CN211054239U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101693279B (en) | Upsetting and extruding precision die-forging forming method for large titanium alloy deep tube parts | |
| CN110815688A (en) | Tube plate processing die and process | |
| CN109675998B (en) | Viscous medium pressure forming method for local curvature abrupt change thin-wall covering part | |
| CN108746374B (en) | Preparation method of hot stamping forming die insert with conformal cooling water channel | |
| CN101168228B (en) | Method for manufacturing high-strength abrasion-proof insert die | |
| CN112705709B (en) | Honeycomb sandwich piece and additive manufacturing method thereof | |
| CN102161151A (en) | Method of manufacturing oil cooler for automatic transmission | |
| CN107322236A (en) | A kind of processing technology of high temperature supporting plate self-lock nut | |
| CN110534765B (en) | Forming method of high-precision metal bipolar plate required by fuel cell | |
| CN211054239U (en) | Tube plate processing die | |
| CN107775594B (en) | The preparation method of electronic equipment liquid cooling pipe assembly | |
| JPH0521663B2 (en) | ||
| CN117382068A (en) | Processing technology of polytetrafluoroethylene coated tube plate | |
| CN110965081B (en) | Copper-steel composite cathode steel bar and manufacturing process thereof | |
| CN215151225U (en) | Special die for integrally forming anticorrosive coating on sealing surface of plastic-lined steel pipe | |
| CN115674541B (en) | Forming method of UHMWPE coated butterfly plate | |
| CN218640486U (en) | Oxidized non-grain aluminum alloy structure | |
| CN109759778A (en) | A kind of corrosion resistant alloy composite three-way pipe fitting production method | |
| CN219390634U (en) | Hot-pressing steel lining plate for heat exchanger | |
| CN115816765B (en) | Forming method of PFA coated butterfly plate without air lines | |
| KR101086319B1 (en) | Method for manufacturing metal tool using thermal spray | |
| CN110319730B (en) | Production process of graphite corrugated heat exchange plate | |
| CN109365598A (en) | A kind of corronil flange flange forming method | |
| CN219861046U (en) | Mold capable of directly molding infrared chalcogenide glass aspheric lens diffraction surface | |
| CN218670669U (en) | PFA coated butterfly plate without air lines |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200721 Termination date: 20211104 |