CN101462369B - Method for preparing pipe sheet for heat-exchange facility and products produced thereby - Google Patents

Method for preparing pipe sheet for heat-exchange facility and products produced thereby Download PDF

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Publication number
CN101462369B
CN101462369B CN 200810208174 CN200810208174A CN101462369B CN 101462369 B CN101462369 B CN 101462369B CN 200810208174 CN200810208174 CN 200810208174 CN 200810208174 A CN200810208174 A CN 200810208174A CN 101462369 B CN101462369 B CN 101462369B
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Prior art keywords
inserts
tube sheet
plates
holes
tube
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CN101462369A (en
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黄争鸣
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黄争鸣
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02Header boxes; End plates
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/06Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
    • F28F21/067Details

Abstract

The present invention provides a method for preparing tube plates for heat exchangers. The method comprises the following steps: a cylindrical die having two end plates is adopted; at least on of the end plates is a movable end plate; the two end plates are provided with a plurality of holes; the number of the holes does not exceed that of tube holes on a tube plate; the positions of the holes are consistent with the positions of the holes on a to-be-machined tube plate; continuous fiber impregnated with thermosetting resin is spread in the cylindrical die; the two end plates are shut, fixed, solidified and made into a tube-plate slab; the slab in an inner cavity of the die is perforated and demolded; the tube holes and bolt holes are machined; the bolt holes with counter bored holes are chambered; the counter bored holes are coated with adhesive; inserts are inlaid in the counter bored holes and bonded; and the middle part of each insert is provided with a through hole communicated with the bolt holes. The tube plate has the advantages of high strength, good rigidity, light weight, excellent anti-fatigue performance, preeminent corrosion resistance and the like, is low in cost, saves resources, and can completely replace metal tube plates and graphite tube plates at a heat exchange temperature not higher than 300 DEG C.

Description

Preparation method of pipe sheet for heat-exchange facility and products thereof
Technical field
The present invention relates to the tube plate structure in shell and tube or the shell-and-tube heat exchanger.
Background technology
Be used for fixing the tube sheet of heat-exchange tube in shell and tube or shell-and-tube heat exchanger or condenser, the tube sheet surface has been covered with pore, and periphery then is furnished with bolt hole, is convenient to pass through bolting between the shell flange with tube sheet and heat exchanger or condenser.The working environment of tube sheet is very abominable: dielectric corrosion, and the thermal stress that the high and low temperature difference causes, operating pressure, strict sealing property requirement also has the impulsive force of media flow generation etc.Present tube sheet generally all is that as cast iron, carbon steel, aluminium alloy, stainless steel, titanium alloy etc., the metal surface is lined with anticorrosion macromolecular material such as rubber, polytetrafluoroethylene (PTFE) etc., or is made by impregnated graphite by metal.Yet, metal material be easy to the corrosion and cost higher.Though improved antiseptic power behind the line with rubber of metal surface, defective such as the thermal coefficient of expansion of glue-line and metal core is inconsistent, the line with rubber layer is aging causes the crack and the wearing and tearing of glue-line easily, and corrosive medium immerses and causes tube sheet to lose efficacy behind the core or scrap.Though graphite has excellent corrosion resisting performance, but a kind of fragile material, under elevated pressures, be easy to generate the moment fracture, cause equipment scrapping even can cause serious security incident, therefore, generally must not surpass 3 atmospheric pressure, the highlyest be no more than 5 atmospheric pressure based on the heat exchanger operating pressure of graphite tube plate.In addition, the impregnating resin of graphite often makes the range of application of its tube sheet limited, as phenolic resins commonly used alkali resistance corrosive medium not just.Therefore, press for the more excellent tube sheet material of invention price ratio.
With continuous carbon fibre, glass fibre etc. is the advanced composite material that reinforcing material is made, compare with metal material and to have numerous excellent properties, big as specific stiffness, specific strength is high, especially the fatigue resistance under alternate stress, thermal stress obviously is better than the common metal material, decay resistance then is that metal material hardly matches, compare with graphite material, strength and stiffness surpass one more than the order of magnitude, and toughness and reliability graphite material especially are difficult to reach.Advanced composite material becomes at first material of aerospace field already.
China utility model patent ZL92227460.6 and ZL200520013504.3 all disclose a kind of fiberglass tube sheet, and the moulding compound of preparing with unsaturated-resins such as aralkyl phenol is a raw material, are that reinforcing material adopts hot press moulding to obtain with the glass fibre.This composite glass steel pipe plate has following some deficiency: 1, the conventional composite tube sheet adopts chopped strand to strengthen, and the clad tubesheet strength and stiffness are relatively low, only are equivalent to 1/3rd to 1/5th of continuous fiber reinforced composite materials strength and stiffness; 2, there is tiny hole in the tube sheet cross section that goes out of mold pressing, and filler in the moulding compound such as calcium carbonate are water wetted materials, can produce swelling after water vapour enters and cause the tube sheet performance degradation, the tube sheet after the swelling also can increase the pressure to the pipeline linkage section, quickens pipeline destroyed; 3, used resin can only be resisted the partial corrosion medium, and as phenolic resins alkali-proof medium not just, the heatproof of unsaturated-resins such as aralkyl phenol is restricted its range of application generally below 180 ℃.
In the practice, the bolt hole of a lot of heat exchanger tube sheet peripheries alternately is designed to hole countersunk, shown in the bolt hole in the accompanying drawing 13, so that went ahead of the rest fixed tube sheet before heat exchanger tube is installed.Counterbore is for burying nut or bolt end is required.When the other end at bolt added screwing force, nut or termination in the counterbore will produce local tension to the edge (intersection of countersunk head cylinder and contact plane, intersection A among Fig. 3,4) of contact-making surface.Because the laminated tearing intensity of continuous fiber reinforced composite materials is relatively very little, and intensity is very high in the face, this local tension is torn by the fibrage of tube sheet bottom counterbore or layering appears in intersection A place, causes the shell side dielectric leakage, causes tube sheet to be scrapped.
Summary of the invention
It is reinforcing material with the continuous fiber that technical problem to be solved by this invention is to provide a kind of, various thermosetting resins or thermoplastic polyester abbreviation high polymer with heatproof and excellent anti-corrosion performance are matrix material, and in the hole countersunk bolt hole, be inlaid with the preparation method of the heat exchanger tube sheet of novel insert structure, the method that comprises processing continuous fiber reinforced composite materials tube sheet, and the method for sink bolt hole.
The Tube Sheet of Heat Exchanger panel products that provides above-mentioned preparation method to obtain is provided another problem to be solved by this invention.
The present invention solves the problems of the technologies described above the technical scheme of being taked: a kind of preparation method of pipe sheet for heat-exchange facility, tube sheet is made by fibre-reinforced thermosetting resin matrix or thermal plasticity high polymer matrix, periphery has the bolt hole of most bolts hole that run through and band counterbore, the middle part is covered with most pores, wherein, described fiber is a continuous fiber, and the preparation method comprises the steps:
Employing has the barrel molds of two end plates, and have at least one to be portable end plate, two end plates is provided with most eyelets, the number in hole is no more than the number (being equal to or less than the number of pore on the tube sheet) of pore on the tube sheet, the position consistency in the hole on the position in hole and the tube sheet to be processed, diameter is not more than the diameter of pore
The first step: the preparation of tube sheet blanket, adopt a kind of in following A, B, C, four kinds of methods of D:
A, the continuous fiber that will be impregnated with thermosetting resin are layered in the barrel molds, two end plates are closed up and fixing, 10 ℃~200 ℃ curing, make the tube sheet blanket;
B, continuous fiber is layered in the barrel molds, two end plates is closed up and fixing, inject thermosetting resin to inner chamber and fill in the inner chamber of close die, continuous fiber is soaked into fully, 10 ℃~200 ℃ curing, makes the tube sheet blanket;
C, continuous fiber and thermal plasticity high polymer film or particle are layered in the barrel molds, thermal plasticity high polymer film or particle are positioned at the outside of continuous fiber, and two end plates is closed up, and cooling curing again after 80 ℃~500 ℃ following fusions is made the tube sheet blanket;
D, continuous fiber and thermal plasticity high polymer fiber are mixed, make fiber cloth, be layered in the barrel molds, two end plates is closed up, cooling curing again after 80 ℃~500 ℃ following fusions is made the tube sheet blanket;
Second step: the blanket in the dies cavity is punched from the end plate eyelet of barrel molds;
The 3rd step: open portable end plate, the demoulding, processing pore and bolt hole;
The 4th step: the bolt hole to the band counterbore carries out reaming, the contact-making surface that the inner surface of counterbore is cooperatively interacted with the outer surface of inserts and be connected with the tube sheet outer face is the conical surface, counterbore place coating adhesive is embedded in inserts in the counterbore bondingly, and inserts middle part is provided with the through hole with bolt hole UNICOM.
The present invention need prepare a cylindrical die with enough rigidity in advance, is made of upper head plate, bottom plate and cylindrical shell, has at least an end plate removable, is connected with cylindrical shell by fixture such as bolt.The interior space that the fixing back of the upper and lower end plate of tube is enclosed has constituted shape and the volume for the treatment of the tubulation plate, the inner surface of upper and lower end plate has identical curvature with the upper surface and the lower surface of tube sheet to be prepared respectively, and the spacing between the inner surface of upper and lower end plate then is the thickness of tube sheet.Preparation is a flat board if desired, and the inner surface of cylindrical die two end plates is parallel plane.
Bottom plate and cylindrical shell are fixed, and upper head plate separates with cylindrical shell.When adopting thermosetting resin such as unsaturated-resin (as vinylite), phenolic resins or epoxy resin, select for use dry method or wet processing that continuous fiber is laid in the unlimited cylindrical shell respectively as matrix material.So-called dry method is laid and is meant the dried cloth of reinforcement fibers of impregnation (not resin pickup) not is laid in the unlimited cylindrical shell.So-called wet method is laid and is meant that then the wet cloth of reinforcement fibers that will be soaked with resin in advance is laid in the unlimited cylindrical shell.Notice that the process of shop one deck fiber cloth brush one deck resin is also referred to as wet method and lays.After laying finishes according to design requirement, upper head plate and cylindrical shell are fixed.If selected the dry method laying for use, so, after upper head plate and cylindrical shell are fixing, also need injecting resin in cylindrical shell, be called for short injecting glue, original dried fiber cloth is soaked into fully.
When adopting thermal plasticity high polymer such as nylon (Nylon), polypropylene (PP), polyether-ether-ketone (PEEK), polyimides (PI), polyphenylene sulfide (PPS), polyether-ketone (PEK), polytetrafluoroethylene (PTFE) etc. as matrix material, must be to mold heated.Can be at the cylindrical shell of mould and embedding heating element heater in the end plate up and down, so that can also can when needed mould be placed in the environment stove, so that realize to mold heated to mold heated.
On the basis of such scheme, the A method of the first step comprises in regular turn: spread one deck airfelt on the end plate of barrel molds earlier, repave the barrier film with holes that layer of surface is coated with releasing agent, tiling is impregnated with the continuous fiber of thermosetting resin then, spread the barrier film with holes that layer of surface is coated with releasing agent again, repave one deck airfelt at last, then two end plates is closed up and fixing, solidify.
On the basis of such scheme, the length of described single continuous fiber and its diameter ratio are not less than 1000: 1, and the volume of continuous fiber is not less than 30% of tube sheet blanket volume.No matter to lay the back injecting glue still be that wet method is laid fiber cloth behind the impregnation to dry method, must guarantee that fiber volume fraction wherein is not less than 30%.Throughput claims the weight of used cloth of reinforcement fibers and resin matrix, according to the density of fiber and matrix, just can estimate fiber volume fraction again.Be cured then, can also can solidify (10 ℃~200 ℃) under middle temperature in room temperature, cylindrical shell will guarantee that with the rigidity of end plate up and down the blanket of composite tube sheet does not deform in solidification process.
On the basis of such scheme, described thermosetting resin is unsaturated-resin (as vinylite), phenolic resins or epoxy resin.
On the basis of such scheme, described thermal plasticity high polymer is nylon, polypropylene, polyether-ether-ketone, polyimides, polyphenylene sulfide, polyether-ketone or polytetrafluoroethylene (PTFE).These high polymers can be graininess, film shape, also can be fibrous.
If high polymer is fibrous, high polymer fibre and continuous fortifying fibre must be mixed into composite yarn, be made into fiber cloth with composite yarn again such as 1: 1, be called blended cloth, be laid in the mould blended cloth is stacked; If high polymer is particle or film shape; can cloth of reinforcement fibers and high polymer is cross layered in cylindrical shell, promptly spread one deck polymer film or particle, repave one deck cloth of reinforcement fibers; up to reaching the desired number of plies, wherein the lowermost layer and the superiors must be polymer film or stratum granulosum.
After the shop layer finished, upper head plate closed.It should be noted that upper head plate at this moment can not fix with the cylindrical shell of mould, but can further move down under pressure.Mould behind the matched moulds is placed between the last lower platen of press, and mould is warmed to melting temperature a little more than high polymer,, depend on the processing characteristics of different high polymers such as high 5~50 degree.Again to the pressurization of the end plate of mould, insulation, pressurize certain hour are after thoroughly soaking into up to all high polymer fusions and with fortifying fibre, stop heating and cooling, but palpus maintenance or intensified pressure solidify the high polymer of fusion up to cooling, obtain continuous fiber reinforced composite materials tube sheet blanket.
On the basis of such scheme, in the 4th step, described inserts is the taper inserts of inversed taper platform shape, or is the countersunk head inserts of an inversed taper platform shape and cylindrical formation one shape.
On the basis of such scheme, described inserts is a kind of the making in metal material, ceramic material, the composite.
On the basis of such scheme, described insert surface is lined with one deck anti-corrosive rubber or polytetrafluoroethylene (PTFE).
On the basis of such scheme, described continuous fiber is one or more in glass fibre, carbon fiber, basalt fibre, silicon nitride fiber, the silicon carbide fibre.
No matter adopting thermosetting resin still to adopt thermal plasticity high polymer is that matrix material prepares the composite tube sheet, all can have residual stress in the blanket.Under the situation of thermosetting resin, residual stress is to be caused by resin solidification heat release (especially the heat release meeting when tube sheet is very thick is very considerable) and curing after-contraction; Under the situation of thermal plasticity high polymer, residual stress is because the temperature stress from high-temperature fusion to the cold curing process causes.These residual stress may be very considerable, to such an extent as to can produce the buckling deformation that is difficult to accept in the practical application when the composite blanket takes out (being the demoulding) from mould after.Plate is thick more, and the residual stress that is produced can be high more, and on the other hand, plate is thin more, is easy to generate buckling deformation more.
For avoiding the warpage of plate, best bet is the residual stress that discharges before the demoulding in the blanket.In view of the surface arrangement of tube sheet has numerous pores, can be in advance in the upper and lower side twist drill hole of mould, all the hole on the end plate is sealed up before the blanket preparation by the plug bolt, also can be by diaphragm seal.After the blanket preparation is finished, is solidified, back out the plug bolt, just can pass end plate the composite blanket is punched, also can directly sealing film be punched, after treating that whole pores or part pore have been beaten, the residual stress in the blanket is fully discharged, the demoulding more thereafter at the eyelet place.The distortion of blanket in the time of can effectively avoiding the demoulding like this.The aperture of being punched can be consistent with the pore diameter of reality, also can be less than design load, treat after the blanket demoulding that reaming is to needed size again.And, the number of holing on the end plate about the mould can be consistent with the number of pore, the number that also can be less than pore, extreme case descends even need not and holing on the end plate up and down, as long as the residual stress in the blanket can access enough release, the buckling deformation that makes blanket after the demoulding no longer occur being difficult to accept gets final product.Then, finish the processing of all pores and peripheral bolt hole again according to the designing requirement of tube sheet, on each the pore cylinder that processes the hole defective can not be arranged.
According to technological requirement, the bolt hole of a lot of tube sheet peripheries alternately is designed to the sink formula, so that went ahead of the rest fixed tube sheet before heat exchanger tube is installed.In the reality, also have many board-like structures of other similar composite such as flange because the special process requirement must be processed with sink formula bolt hole.Counterbore is for burying nut or bolt end is required.Make clad tubesheet be torn or layering occurs for fear of local tension at intersection A place at the fibrage of counterbore bottom, employing can be born inserts of materials processing of bolt tension in addition, such as adopting carbon steel material processing inserts rear surface lining anti-corrosive rubber or polytetrafluoroethylene (PTFE), be embedded in the counterbore the added power of holding nut or bolt end.The design principle of inserts is can guarantee after the bolt reinforcing composite tube sheet is produced compression from top to bottom, just to the material production compression between two surfaces about the tube sheet, therefore, the present invention is designed to the conical surface that ecto-entad draws in gradually with the contact-making surface of inserts and counterbore, thereby transmit pressure better, thereby stop the part of tube sheet to be torn or layering.
Pipe sheet for heat-exchange facility product at above-mentioned preparation method's acquisition, its pore cylinder does not have visual slit, be inlaid with inserts in the bolt hole of band counterbore, the outer surface of inserts cooperatively interacts with the inner surface of counterbore and the contact-making surface that is connected with the tube sheet outer face is the conical surface, inserts middle part is provided with the through hole with bolt hole UNICOM, between inserts and counterbore by adhesives.
The invention has the beneficial effects as follows:
The present invention provides a kind of new tube sheet for widely used field of heat exchangers, have intensity height, good rigidity, in light weight, advantages such as anti-fatigue performance is excellent, decay resistance brilliance, and with low cost, saving resource, be not higher than in heat exchange temperature under 300 ℃ the situation, fully can the substituted metal tube sheet, graphite tube plate, advantage is more obvious, has broad application prospects.
Description of drawings
Fig. 1 is the structural representation of tube sheet of the present invention.
Fig. 2 is the sectional structure schematic diagram of the bolt hole of band counterbore of the present invention.
The sectional structure schematic diagram that Fig. 3 cooperates with bolt hole for taper inserts of the present invention.
The sectional structure schematic diagram that Fig. 4 cooperates with bolt hole for countersunk head inserts of the present invention.
Fig. 5 is for adopting the continuous fiber reinforced composite materials tube sheet photo of the technology of the present invention preparation.
1-tube sheet 11-outer face
The 2-bolt hole
3-bolt hole 31-counterbore
The 4-pore
5-taper inserts 51-through hole
6-countersunk head inserts 61-through hole
7-contact-making surface A-intersection
The specific embodiment
Embodiment 1
See also Fig. 1 for the structural representation of tube sheet of the present invention and Fig. 2 for shown in the sectional structure schematic diagram of the bolt hole of band counterbore of the present invention, a kind of preparation method of pipe sheet for heat-exchange facility, tube sheet 1 is made by fibre-reinforced thermosetting resin, periphery has the bolt hole 3 of most bolts hole that run through 2 and band counterbore 31, the middle part is covered with most pores 4, wherein, described fiber is a continuous fiber, and the preparation method comprises the steps:
Preparation process:
Adopt the metal material processing mould, having three is bottom plate, cylindrical shell and upper head plate, two end plates is provided with most eyelets, the number in hole is no more than the number of pore on the tube sheet, the position of center line in hole is consistent with the position of center line of tubesheet holes to be processed, diameter then is equal to or less than the diameter of tubesheet holes, and bottom plate and mould cylindrical shell are fixed.
See also shown in the sectional structure schematic diagram that Fig. 3 cooperates with bolt hole for taper inserts of the present invention, adopt high performance ceramic material to make the taper inserts 5 of inversed taper platform shape, taper inserts 5 middle parts are provided with the through hole 51 with bolt hole UNICOM.
The first step: lay from bottom to top successively the lower surface of barrel molds: spread one deck airfelt earlier, repave the barrier film with holes that layer of surface is coated with releasing agent, successively lay the continuous fiber that is impregnated with epoxy resin then, the content of epoxy resin will be just to have soaked into continuous fiber for good, guarantee that fiber volume fraction is not less than 30% of blanket volume, by designing requirement lay finish after, spread the barrier film with holes that layer of surface is coated with releasing agent again, repave one deck airfelt at last, two end plates closed up and fixing, be warmed to 60~170 ℃ of curing, make the tube sheet blanket;
Second step: from the upper head plate eyelet of barrel molds the blanket after solidifying is punched, all beaten up to the hole of institute's perforation correspondence;
The 3rd step: the end plate that takes apart a die, take out the blank in the mould, after peeling off airfelt and barrier film with holes, further finish the processing of all tubesheet holes and the processing of fixed bolt hole according to designing requirement, on each the pore cylinder that processes no viewing hole eyelet crack just be considered as qualified; The 4th step: the bolt hole 3 to band counterbore 31 carries out reaming, the contact-making surface 7 that the inner surface of counterbore 31 is cooperatively interacted with the outer surface of taper inserts 5 and be connected with tube sheet outer face 11 is the conical surface, counterbore place 31 coating adhesives are embedded in the counterbore 31 taper inserts 5 bonding.
Embodiment 2
Tube plate structure is identical with embodiment 1.
A kind of preparation method of pipe sheet for heat-exchange facility comprises the steps:
Preparation process:
Adopt the metal material processing mould, having three is bottom plate, cylindrical shell and upper head plate, two end plates is provided with most eyelets, the number in hole is no more than the number of pore on the tube sheet, the position of center line in hole is consistent with the position of center line of tubesheet holes to be processed, and diameter then is equal to or less than the diameter of tubesheet holes, and a plug bolt that can seal is all joined in each hole, correct position at mould is laid injection orifice and venthole, and bottom plate and mould cylindrical shell are fixed.
See also shown in the sectional structure schematic diagram that Fig. 4 cooperates with bolt hole for countersunk head inserts of the present invention, adopt metal material to make the countersunk head inserts 6 of an inversed taper platform shape and cylindrical formation one shape, countersunk head inserts 6 middle parts are provided with the through hole 61 with bolt hole UNICOM, and the surface of countersunk head inserts 6 is lined with one deck polytetrafluoroethylene (PTFE).
The first step: continuous fiber is layered in the barrel molds, upper head plate closed up and fixing, in the inner chamber of close die, inject vinylite, all obtain soaking into and unnecessary resin overflows from venthole up to all continuous fibers, the consumption of resin will guarantee that fiber volume fraction is not less than 30% of blanket volume, at room temperature solidify, make the tube sheet blanket;
Second step: the plug bolt of the end plate up and down of mould is shed, pass the bolt eyelet, all beaten up to the hole of institute's perforation correspondence to the blanket punching after solidifying;
The 3rd step: the end plate that takes apart a die, take out blanket, further finish the processing of tubesheet holes and the processing of fixed bolt hole according to designing requirement, on each the pore cylinder that processes no viewing hole eyelet crack just be considered as qualified;
The 4th step: the bolt hole 3 to band counterbore 31 carries out reaming, the contact-making surface 7 that the inner surface of counterbore 31 is cooperatively interacted with the outer surface of countersunk head inserts 6 and be connected with tube sheet outer face 11 is the conical surface, counterbore place 31 coating adhesives are embedded in the counterbore 31 countersunk head inserts 6 bonding.
Embodiment 3
Tube plate structure is identical with embodiment 1.
A kind of preparation method of pipe sheet for heat-exchange facility comprises the steps:
Preparation process:
Adopt the metal material processing mould, having three is bottom plate, cylindrical shell and upper head plate, embedding in the mould have a heating element heater, two end plates is provided with most holes, the number in hole is no more than the number of pore on the tube sheet, and the position of center line in hole is consistent with the position of center line of tubesheet holes to be processed, and diameter then is equal to or less than the diameter of tubesheet holes, a plug bolt that can seal is all joined in each hole, and bottom plate and mould cylindrical shell are fixed.
Adopt metal material to make the taper inserts 5 of inversed taper platform shape, taper inserts 5 middle parts are provided with the through hole 51 with bolt hole UNICOM, and the surface of taper inserts 5 is lined with one deck and contains fluorubber.
The first step: polypropylene film intersected by designing requirement with continuous glass fibre cloth successively be laid in the mould, wherein the lowermost layer and the superiors are polypropylene film, polyacrylic consumption will guarantee that fiber volume fraction is not less than 30% of blanket volume, want after upper head plate closes and to move down, barrel molds is placed between the last lower platen of press, to mold heated to being higher than 194 ℃ of polypropylene fusion temperature, after surpassing 180 ℃ everywhere, the temperature (adopting infrared radiation thermometer to measure) of insulation in mould be incubated 30 minutes again, mould is pressurizeed 0.5MPa after about 10 minutes, stop heating, treat progressively to increase after temperature in the mould is reduced to 170 ℃ pressure to 2.5MPa until naturally cooling to room temperature;
Second step: the plug bolt of end plate about the mould is shed, pass the bolt eyelet, all beaten up to the hole of institute's perforation correspondence to the blanket punching after solidifying;
The 3rd step: the end plate that takes apart a die, take out blanket, further finish the processing of tubesheet holes and the processing of fixed bolt hole according to designing requirement, on each the pore cylinder that processes no viewing hole eyelet crack just be considered as qualified;
The 4th step: the bolt hole 3 to band counterbore 31 carries out reaming, the contact-making surface 7 that the inner surface of counterbore 31 is cooperatively interacted with the outer surface of taper inserts 5 and be connected with tube sheet outer face 11 is the conical surface, counterbore place 31 coating adhesives are embedded in the counterbore 31 taper inserts 5 bonding.

Claims (8)

1. the preparation method of a pipe sheet for heat-exchange facility, tube sheet is made by fibre-reinforced thermosetting resin or thermal plasticity high polymer, periphery has the bolt hole of most bolts hole that run through and band counterbore, the middle part is covered with most pores, it is characterized in that: described fiber is a continuous fiber, and the preparation method comprises the steps:
Employing has the barrel molds of two end plates, and has at least one to be portable end plate, and two end plates is provided with most eyelets, and the number in hole is no more than the number of pore on the tube sheet, the position consistency in the hole on the position in hole and the tube sheet to be processed,
The first step: the preparation of tube sheet blanket, adopt a kind of in A, B, four kinds of methods of C, D:
A, the continuous fiber that will be impregnated with thermosetting resin are layered in the barrel molds, two end plates are closed up and fixing, 10~200 ℃ of curing, make the tube sheet blanket;
B, continuous fiber is layered in the barrel molds, two end plates is closed up and fixing, inject thermosetting resin to inner chamber and fill in the inner chamber of close die, continuous fiber is soaked into fully, 10~200 ℃ of curing, makes the tube sheet blanket;
C, continuous fiber and thermal plasticity high polymer film or particle are layered in the barrel molds, thermal plasticity high polymer film or particle are positioned at the outside of continuous fiber, and two end plates is closed up, and cooling curing again after 80~500 ℃ of following fusions is made the tube sheet blanket;
D, continuous fiber and thermal plasticity high polymer fiber are mixed, make fiber cloth, be layered in the barrel molds, two end plates is closed up, cooling curing again after 80~500 ℃ of following fusions is made the tube sheet blanket;
Second step: the blanket in the dies cavity is punched from the end plate eyelet of barrel molds;
The 3rd step: open portable end plate, the demoulding, processing pore and bolt hole;
The 4th step: the bolt hole to the band counterbore carries out reaming, the inner surface of counterbore is cooperatively interacted and the contact-making surface that is connected with the tube sheet outer face is the conical surface, counterbore place coating adhesive with the outer surface of inserts, be embedded in the counterbore inserts bonding, the inserts middle part is provided with the through hole with bolt hole UNICOM, wherein
Described continuous fiber is one or more in glass fibre, carbon fiber, basalt fibre, silicon nitride fiber, the silicon carbide fibre, the length of single continuous fiber and its diameter ratio are not less than 1000: 1, and the volume of continuous fiber is not less than 30% of tube sheet blanket volume.
2. the preparation method of pipe sheet for heat-exchange facility according to claim 1, it is characterized in that: the A method of the first step comprises in regular turn: spread one deck airfelt on the end plate of barrel molds earlier, repave the barrier film with holes that layer of surface is coated with releasing agent, tiling is impregnated with the continuous fiber of thermosetting resin then, spread the barrier film with holes that layer of surface is coated with releasing agent again, repave one deck airfelt at last, then two end plates is closed up and fixing, solidify.
3. the preparation method of pipe sheet for heat-exchange facility according to claim 1 and 2, it is characterized in that: described thermosetting resin is unsaturated-resin, phenolic resins or epoxy resin.
4. the preparation method of pipe sheet for heat-exchange facility according to claim 1 and 2, it is characterized in that: described thermal plasticity high polymer is nylon, polypropylene, polyether-ether-ketone, polyimides, polyphenylene sulfide, polyether-ketone or polytetrafluoroethylene (PTFE).
5. the preparation method of pipe sheet for heat-exchange facility according to claim 1 and 2 is characterized in that: in the 4th step, described inserts is the taper inserts of inversed taper platform shape, or is the countersunk head inserts of an inversed taper platform shape and cylindrical formation one shape.
6. the preparation method of pipe sheet for heat-exchange facility according to claim 5, it is characterized in that: described inserts is a kind of the making in metal material, ceramic material, the composite.
7. the preparation method of pipe sheet for heat-exchange facility according to claim 6, it is characterized in that: described insert surface is lined with the fluorine-containing rubber of one deck.
8. the pipe sheet for heat-exchange facility product that obtains at the described preparation method of one of claim 1 to 7, its pore cylinder is seamless, be inlaid with inserts in the bolt hole of band counterbore, the outer surface of inserts cooperatively interacts with the inner surface of counterbore and the contact-making surface that is connected with the tube sheet outer face is the conical surface, inserts middle part is provided with the through hole with bolt hole UNICOM, between inserts and counterbore by adhesives.
CN 200810208174 2008-12-30 2008-12-30 Method for preparing pipe sheet for heat-exchange facility and products produced thereby Expired - Fee Related CN101462369B (en)

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CN102107534B (en) * 2009-12-29 2013-06-26 合肥杰事杰新材料股份有限公司 Method for manufacturing bicycle frame by using continuous fiber reinforced thermoplastic composite materials
CN102285124A (en) * 2011-04-30 2011-12-21 南京玻璃纤维研究设计院 Manufacturing method of unidirectional fibre reinforced plastic flat plates
CN102950781B (en) * 2012-11-23 2015-04-15 成都飞机工业(集团)有限责任公司 Hole making method of thin-walled honeycomb sandwich composite structural member
CN103411462B (en) * 2013-07-18 2015-07-01 辽宁瑟克赛斯热能科技有限公司 Plate heat exchanger pressing plate and manufacturing method thereof
CN103604305B (en) * 2013-10-22 2016-12-07 徐连波 A kind of barometric condenser peculiar to vessel and preparation method thereof and closed circulation system peculiar to vessel
CN104139530A (en) * 2014-06-25 2014-11-12 福建海源新材料科技有限公司 Compression molding method for carbon fiber reinforced thermoplastic polyimide
CN106166844B (en) * 2016-07-01 2018-11-20 山东省科学院能源研究所 Fluoroplastics heat exchange structure

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