CN204036792U - A kind of preparation system of One-step production insulating tube - Google Patents
A kind of preparation system of One-step production insulating tube Download PDFInfo
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- CN204036792U CN204036792U CN201420465302.1U CN201420465302U CN204036792U CN 204036792 U CN204036792 U CN 204036792U CN 201420465302 U CN201420465302 U CN 201420465302U CN 204036792 U CN204036792 U CN 204036792U
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- outer jacket
- steel pipe
- insulating tube
- electrode
- preparation system
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- 238000002360 preparation method Methods 0.000 title claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 65
- 239000010959 steel Substances 0.000 claims abstract description 65
- 239000004033 plastic Substances 0.000 claims abstract description 41
- 229920003023 plastic Polymers 0.000 claims abstract description 41
- 238000009413 insulation Methods 0.000 claims abstract description 36
- 238000002347 injection Methods 0.000 claims abstract description 35
- 239000007924 injection Substances 0.000 claims abstract description 35
- 238000010438 heat treatment Methods 0.000 claims abstract description 31
- 238000005187 foaming Methods 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 18
- 238000003851 corona treatment Methods 0.000 claims abstract description 17
- 239000011550 stock solution Substances 0.000 claims abstract description 9
- 238000007493 shaping process Methods 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 19
- 239000002184 metal Substances 0.000 claims description 16
- 229910052751 metal Inorganic materials 0.000 claims description 16
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 12
- 229910052802 copper Inorganic materials 0.000 claims description 12
- 239000010949 copper Substances 0.000 claims description 12
- 239000012948 isocyanate Substances 0.000 claims description 10
- 150000002513 isocyanates Chemical class 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 8
- 230000002745 absorbent Effects 0.000 claims description 7
- 239000002250 absorbent Substances 0.000 claims description 7
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 239000003643 water by type Substances 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 abstract description 3
- 230000001070 adhesive effect Effects 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 6
- 239000006260 foam Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 238000005422 blasting Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920001617 Vinyon Polymers 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 238000007348 radical reaction Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
A kind of preparation system of One-step production insulating tube, described insulating tube comprises the steel pipe, heat-insulation layer, the outer jacket that successively arrange from inside to outside, described preparation system comprises steel pipe market device, for the plastic extruder of shaping outer jacket, the high pressure foaming machine to the foaming stock solution of injection formation heat-insulation layer between outer jacket and steel pipe, is provided with the frequency heating device of steel pipe being carried out to preheating between described steel pipe market device and plastic extruder; The discharge end that described plastic extruder forms outer jacket is provided with corona treatment plant, and described corona treatment plant comprises interior electrode, external electrode, high voltage source, and interior electrode supporting is arranged on the inner surface of outer jacket, and external electrode is coated on the outer surface of outer jacket.The utility model, by increasing sided corona treatment, heating in medium frequency process, adds the adhesive force between outer jacket and heat-insulation layer, guarantees that the compact density of heat-insulation layer is even, achieves the Trinitarian tight structure of insulating tube.
Description
Technical field
The utility model relates to a kind of preparation system of prefabricated insulated piping, specifically a kind of preparation system by one step processing explained hereafter insulating tube.
Background technology
Insulating tube is the abbreviation of insulated piping, for the conveying of liquid, gas and other media, is all widely used in the adiabatic heat-insulation engineering of the pipelines such as oil, chemical industry, space flight, military affairs, central heating, central air-conditioning, municipal administration.
Usually, insulating tube is from inside to outside divided into three-decker,
Ground floor: working steel tube layer, is called for short steel pipe.Steel pipe is according to Customer design and require generally to select seamless steel pipe, spiral steel pipe and steel pipes with straight.Steel tube surface, after impeller blasting PROCESS FOR TREATMENT, reaches the requirement of relevant criterion.
The second layer: polyurethane insulation coating, is called for short heat-insulation layer.Heat-insulation layer is coated on the outer surface of steel pipe layer, is foamed make in production by high pressure foaming machine.
Third layer: high density polyethylene protective coating, is called for short outer jacket or outer pillar.Normally there is the black of certain wall thickness or yellow vinyon tubing.Its effect one is that protection heat-insulation layer exempts from mechanical hard object destruction, and two is anticorrosion, waterproof.
Existing One-step production insulating tube preparation system mainly comprises steel pipe market device, plastic extruder, high pressure foaming machine, its production technology is: pretreated steel pipe by conveying device delivery forward, penetrate the centre bore of head from the side of plastic extruder, stretch out plastic extruder from opposite side afterwards.After the distance of stretching out plastic extruder when steel pipe reaches design length, formation outer jacket extruded by the plastic raw materials in plastic extruder.Outer jacket is wrapped outside steel pipe with the form retaining certain interval, travels forward with steel pipe synchronous uniform velocity.In outer jacket traveling process synchronous with steel pipe, the gun barrel of high pressure foaming machine injects RPUF stoste in the cavity between outer jacket and steel pipe, stoste is foaming immediately, and between outer jacket and steel pipe, foaming forms heat-insulation layer, " the tube-in-tube foaming " that be commonly called as.This technique synchronously forms insulating tube in same step, therefore claims one step processing.
Preparation system and the technics comparing of existing one-step method are simple, but there is certain shortcoming: 1. in actual production, influenced by ambient temperature, heat-insulation layer foam density is uneven, heat-insulation layer near steel tube surface can not effectively foam, one deck sclerderm may be produced, waste raw material, affect associativity and the heat insulation effect of steel pipe and heat-insulation layer.2. heat-insulation layer is formed by there is chemical reaction after PPG and isocyanates mixing.Wherein isocyanates is very sensitive to the moisture in air, and in the storage of Isocyanate prepolymers body, the moisture of the moisture in air and chamber wall attachment can make isocyanate group content reduce, and makes performed polymer viscosity become large even gel.In producing, use charge pump material feeding, gel occurring by directly irregularly destroying the charge pump of isocyanates, causing normally producing.3., in actual use, the effect of being expanded with heat and contract with cold, outer jacket and heat-insulation layer easily depart from, and " shelling " phenomenon occurs.
Utility model content
The utility model technical issues that need to address are to provide a kind of preparation system of One-step production insulating tube, and the phenomenon that shells not easily occurs the insulating tube produced.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is:
A kind of preparation system of One-step production insulating tube, described insulating tube comprises the steel pipe successively arranged from inside to outside, heat-insulation layer, outer jacket, described preparation system comprises steel pipe market device, for the plastic extruder of shaping outer jacket, to the high pressure foaming machine injecting the foaming stock solution forming heat-insulation layer between outer jacket and steel pipe, after improvement, the discharge end that described plastic extruder forms outer jacket is provided with corona treatment plant, described corona treatment plant comprises interior electrode, external electrode, high voltage source, interior electrode supporting is arranged on the inner surface of outer jacket, external electrode is coated on the outer surface of outer jacket.
The preparation system of above-mentioned One-step production insulating tube, the head place of described plastic extruder arranges the calibration sleeve corresponding with the internal diameter of outer jacket, the side that calibration sleeve stretches out the shaping outer jacket of plastic extruder arranges interior electrode, interior electrode comprises the copper mesh sticking on calibration sleeve outer ring surface, and copper mesh connects the positive pole of high voltage source by the high-voltage conducting wires that passes calibration sleeve inner ring; The top of calibration sleeve arranges external electrode, and dispatch from foreign news agency very waters the water applied on outer jacket, and the below of external electrode arranges water tank, and the bottom of water tank is connected to the negative pole of high voltage source by high-voltage conducting wires.
The preparation system of above-mentioned One-step production insulating tube, described copper mesh is 80 ~ 100 object silk screens, wraps up polytetrafluoro pipe insulation layer outside high-voltage conducting wires.
The preparation system of above-mentioned One-step production insulating tube, be fixed with the absorbent material preventing the water of external electrode from immersing head outside the head of described plastic extruder, the centre bore corresponding with the external diameter of outer jacket is offered at the center of absorbent material.
The preparation system of above-mentioned One-step production insulating tube, described interior electrode comprises bracing frame and the uniform bristle electrode of solid matter, bracing frame arranges the centre bore corresponding with the external diameter of steel pipe, the uniform bristle electrode of solid matter in the form of a ring, is radially close-coupled on the outer shroud of bracing frame, the outside of outer shroud is all stretched out in the end of every root bristle electrode, and the uniform bristle electrode of solid matter stretches out the track formed outside outer shroud and mates with the internal diameter of outer pillar;
The annular metal electrode of described dispatch from foreign news agency very ring set pillar outer surface outside, described annular metal Electrode connection is to the negative pole of high voltage source, and the uniform bristle Electrode connection of described solid matter is to the positive pole of high voltage source.
The preparation system of above-mentioned One-step production insulating tube, described annular metal electrode is fixed by pedestal, and support frame as described above is fixed on head place by bracing wire.
The preparation system of above-mentioned One-step production insulating tube, is provided with the frequency heating device of steel pipe being carried out to preheating between described steel pipe market device and plastic extruder; Frequency heating device comprises intermediate frequency power supply, medium-frequency heating coil, sensor and controller, the rated power of described intermediate frequency power supply is 600kW, intermediate frequency power supply connects the medium-frequency heating coil being preset in the outer surface of steel pipe, the side of the steel pipe of sensor setting after heating in medium frequency process, sensor, intermediate frequency power supply are all connected with controller.
The preparation system of above-mentioned One-step production insulating tube, the foaming stock solution of described heat-insulation layer comprises isocyanates, the Raw material pail of splendid attire isocyanates arranges air pressure material feeding bung, air pressure material feeding bung comprises bung body, be arranged on air injection pipe on bung body and discharge nozzle, air injection pipe is communicated to the bung place of Raw material pail, and discharge nozzle stretches into the bottom of Raw material pail.
The preparation system of above-mentioned One-step production insulating tube, described air injection pipe arranges pressure-reducing valve, discharge nozzle arranges filter, junction, the bung body of described bung body and Raw material pail and arrange sealing ring between air injection pipe and discharge nozzle.
The preparation system of above-mentioned One-step production insulating tube, described bung body and Raw material pail are made as integrative-structure, the internal diameter of air injection pipe is greater than the external diameter of discharge nozzle, one end that discharge nozzle connects Raw material pail is sleeved in air injection pipe, the other end of discharge nozzle is separated with air injection pipe by a separator, and the discharge nozzle isolating air injection pipe arranges filter.
The utility model, after employing technique scheme, has the effect of following technological progress:
The utility model makes in the process of insulating tube at one step processing, sided corona treatment is carried out to outer jacket, its principle utilizes high-frequency high-voltage to produce low temperature plasma in the inner surface electric shock of outer jacket, make generation radical reaction and make polymer occur to be cross-linked, the inner surface of outer jacket is roughening, adhesive ability is enhanced, thus improves the associativity of outer jacket and heat-insulation layer, effectively prevents the generation of shelling phenomenon.
The utility model is by the design and installation cleverly of the positive pole of corona in calibration sleeve, and negative pole water and high-voltage conducting wires return corona power distribution cabinet, safely and effectively products quality guarantee.And for the insulating tube of larger diameter model, then arrange internal hair brush electrode as positive pole, fixing annular metal electrode by embedded bracing frame and be set to negative pole, the impact by outer jacket active force is less, and working stability is reliable.
The utility model carries out heating in medium frequency process to the steel pipe in propelling, and the heat-insulation layer foam density uniformity produced after heating, sclerderm phenomenon does not occur yet, improve heat insulation effect, decrease wastage of material.
The utility model considers that isocyanates is subject to the particularity that moisture effects is larger, the Raw material pail of design band air pressure material feeding bung, air pressure is added in Raw material pail, by air pressure in direct for the stoste in Raw material pail injection device container, structure is simple, do not re-use mechanical system material feeding, avoid pump clogging.
The utility model, by increasing sided corona treatment, heating in medium frequency process in one step processing process, considerably increases the adhesive force between outer jacket and heat-insulation layer, guarantees that the compact density of heat-insulation layer is even, thus achieves the Trinitarian tight structure of insulating tube.
Accompanying drawing explanation
Fig. 1 is the primary structure schematic diagram of embodiment 1;
Fig. 2 is the structural representation of the Raw material pail of embodiment 1;
Fig. 3 is the structural representation of embodiment 2;
Fig. 4 is the right view of Fig. 3;
Fig. 5 is the structural representation of the Raw material pail of embodiment 3.
In figure, each label is expressed as: 1, the head of plastic extruder, 2, outer jacket, 21, annular metal electrode, 22, internal hair brush electrode, 221, bristle electrode, 222, bracing frame, 23, support wheel, 24, bracing wire, 3, absorbent material, 4, water pipe, 5, copper mesh, 6, calibration sleeve, 7, steel pipe, 8, gun barrel, 9, water tank, 10, Raw material pail, 101, staving, 102, bung body, 103, discharge nozzle, 104, air injection pipe, 105, pressure-reducing valve, 106, filter, 107, filter screen, 108, sealing ring, 109, suction nozzle, 110, discharging gate, 111, separator, 11, medium-frequency heating coil, 12, blender, 13, high pressure foaming machine.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in further details:
Embodiment 1
Insulating tube of the present invention comprises steel pipe 7 successively coated from inside to outside, heat-insulation layer, outer jacket 2; Described preparation system comprise the steel pipe market device set gradually, the frequency heating device that steel pipe is heated, carry out for the plastic extruder of shaping outer jacket, externally pillar sided corona treatment corona treatment plant, to the high pressure foaming machine injecting the foaming stock solution forming heat-insulation layer between outer jacket and steel pipe.
According to the moulding process of insulating tube, preparation system of the present utility model is described below:
A. the pretreatment such as impeller blasting are carried out to the outer surface of steel pipe 7, make it meet associated specifications.After pretreatment, steel pipe 7 is advanced forward under the conveying of steel pipe market device (carrying roller).When steel pipe 7 runs to the frequency heating device near plastic extruder, heating in medium frequency process is carried out to the outer surface of steel pipe 7.
Use the intermediate frequency power supply of rated power 600kV, primary voltage 380V, inlet wire current 960A to carry out heating in medium frequency process to steel pipe 7, the device used also comprises medium-frequency heating coil 11, sensor and controller.Described medium-frequency heating coil 11 arranges some groups, and often organize medium-frequency heating coil 11 and all connect intermediate frequency power supply, some groups of medium-frequency heating coil 11 apart windings are at the outer surface of steel pipe 7.Described sensor is infrared temperature measurement gun, and temperature-measuring gun is fixedly mounted on the side of the steel pipe after carrying out heating in medium frequency process.Controller connecting sensor, intermediate frequency power supply.Sensor measurement carries out the temperature of the steel pipe after heating in medium frequency process, this temperature value is fed back to controller, controller is according to the difference of design temperature (controlling the temperature about 30 DEG C of steel pipe) with measuring tempeature, the group number of the adjustment output valve of intermediate frequency power supply and/or the medium-frequency heating coil 11 of connection, thus the setting target that guarantee reaches the heating in medium frequency that steel pipe carries out.
B. the steel pipe 7 after frequency heating device heating moves forward, and enters the centre bore of the head 1 of plastic extruder, and stretch out plastic extruder from the opposite side of centre bore from the side of plastic extruder.After the distance of stretching out plastic extruder when steel pipe 7 reaches design length, the plastic raw materials in plastic extruder is extruded and is formed outer jacket 2.The outer jacket 2 extruded is coaxially arranged with steel pipe 7, and outer jacket 2 is looped around outside steel pipe 7, and and leaves certain cavity between copper pipe 7.When the outer jacket 2 extruded reaches preseting length value, by corona treatment plant, sided corona treatment is carried out to the inner surface of outer jacket 2.
Corona treatment plant comprises high voltage source, interior electrode, external electrode.The voltage of high voltage source is 20 ~ 25kV, frequency is the dc source of 16 ~ 23Hz, and interior electrode supporting is arranged on the inner surface of outer jacket, and external electrode is coated on the outer surface of outer jacket.
Interior electrode in the present embodiment is arranged on the inner surface of outer jacket 2 by a calibration sleeve 6, and dispatch from foreign news agency is very flushed in the water of outer jacket 2 outer surface.Concrete, as shown in Figure 1, arrange a calibration sleeve 6 at head 1 place of plastic extruder, calibration sleeve 6 is the central column structure of band central through hole, and the external loop diameter of calibration sleeve 6 is corresponding with the internal diameter of outer jacket 2.Calibration sleeve 6 ensures that outer jacket moves ahead smoothly along calibration sleeve, and calibration sleeve 6 pairs of outer jackets have certain supporting role simultaneously.In addition, calibration sleeve 6 also arranges water jacket samdwich, uses as coolant jacket.A part for calibration sleeve 6 is located in the centre bore at head place of plastic extruder, and another part stretches out plastic extruder, and the corresponding side shaping at outer jacket of external part.
Interior electrode is arranged on the side that calibration sleeve 6 stretches out plastic extruder, and interior electrode mainly comprises 80 ~ 100 object copper mesh 5.Copper mesh 5 sticks and is looped around calibration sleeve 6 and stretches out on the outer ring surface of the far-end of plastic extruder, copper mesh 5 connects high-voltage conducting wires, polytetrafluoro pipe insulation layer is wrapped up outside high-voltage conducting wires, and penetrate the inner ring of calibration sleeve 6 away from the end of plastic extruder from calibration sleeve 6, stretch out from the other end of calibration sleeve 6 afterwards, be finally connected to the positive pole of high voltage source.
External electrode is arranged on the top of calibration sleeve 6, dispatch from foreign news agency very waters the water applied on outer jacket by water pipe 4, the below of external electrode arranges water tank 9, and the bottom of water tank 9 connects the high-voltage conducting wires of parcel polytetrafluoro pipe insulation layer, and the other end of high-voltage conducting wires is connected to the negative pole of high voltage source.
The absorbent material 3 preventing the water of external electrode from immersing head is fixed with at head 1 place near plastic extruder.In the present embodiment, absorbent material 3 is sponge, and the centre bore corresponding with the external diameter of outer jacket is offered at the center of sponge.The size of centre bore, to ensure the smooth and easy center by sponge of outer jacket, can also absorb moisture simultaneously and prevent moisture inflow head place from being good.The centre bore arranged outside metal intermediate plate of sponge, intermediate plate is connected to head place by a standing screw, thus realizes the fixing of sponge.
The corona treatment plant of the present embodiment is applicable to the insulating tube that diameter range is 32 ~ 1420mm.
C. outer jacket after sided corona treatment 2 and steel pipe 7 continue synchronous uniform velocity and travel forward, and when advancing to setpoint distance, the gun barrel 8 of high pressure foaming machine injects foaming stock solution to the cavity between outer jacket 2 and steel pipe 7, and foaming stock solution foams formation heat-insulation layer immediately.
As shown in Figure 1, the gun barrel 8 in the present embodiment is set in the inner ring of calibration sleeve 6, the outside of steel pipe 7, and the end of fluid injection is positioned at the far-end that calibration sleeve 6 stretches out plastic extruder.The foaming stock solution of heat-insulation layer is the chemical reactant of PPG and isocyanates, in production, the stoste of two kinds of raw materials is contained in Raw material pail 10 respectively in advance, during foaming, two kinds of Raw material pails share a blender 12, blender 12 coordinates Raw material pail to extract out wherein while a kind of stoste, also by negative pressure, the stoste of another kind of raw material is extracted out, after two kinds of stostes fully mix in blender 12, sprayed by gun barrel 8 after jointly entering high pressure foaming machine 13.
Raw material pail 10 is set to the structure with air pressure material feeding bung by the present embodiment, and as depicted in figs. 1 and 2, the bung place, top of Raw material pail 10 arranges air pressure material feeding bung.Air pressure material feeding bung comprises bung body 102, air injection pipe 104 and discharge nozzle 103.One end of air injection pipe 104 connects source of the gas, and the other end is concordant with the lower surface of bung body 102 through bung body 102.For ensureing that Raw material pail internal gas pressure is unlikely to too high, air injection pipe 104 is arranged pressure-reducing valve 105.One end of discharge nozzle 103 is through the bottom stretching into Raw material pail 10 after bung body 102, and the other end is connected to the feed end of high pressure foaming machine 13 through a blender 12.Junction, the bung body 102 of bung body 102 and Raw material pail 10 and between air injection pipe 104 and discharge nozzle 103, sealing ring 108 is set.During use, air injection pipe 104 is communicated to the bung place of Raw material pail 10, and the stoste in Raw material pail 10 enters discharge nozzle 103 by gas pressure bottom Raw material pail 10, enters high pressure foaming machine 13 after stoste enters discharge nozzle 103 through blender 12.
Embodiment 2
The difference of the present embodiment and embodiment 1 is: carrying out electrode in sided corona treatment to outer jacket is an internal hair brush electrode 22, and dispatch from foreign news agency is an annular metal electrode 21 very.
Concrete, as shown in Figure 3 and Figure 4, internal hair brush electrode 22 comprises bracing frame 222 and bristle electrode 221, and wherein, bracing frame 222 is made up of center ring, support bar and outer shroud.Described center ring and outer shroud are arranged with one heart, and the internal diameter of center ring mates with the external diameter of steel pipe 7, and steel pipe 7 can be allowed to pass through smoothly in center ring, and the external diameter of outer shroud is slightly less than the internal diameter of outer jacket, and support bar is radially evenly connected between center ring and outer shroud.Some bristle electrodes 221 are close-coupled on outer shroud, and every root bristle electrode 221 is all disposed radially, and the inside and outside both sides of outer shroud are all stretched out at the two ends of bristle electrode 221.Bristle electrode 221 stretches out the track formed outside outer shroud and mates with the internal diameter of outer jacket 2, ensures that bristle electrode 221 can contact outer jacket 2, but to outer jacket 2 not damaged.Support bar between inner ring with outer shroud is connected the high-voltage conducting wires of a parcel polytetrafluoro pipe insulation layer, high-voltage conducting wires passes the centre bore of plastic extruder to the rightabout of advancing, and connects the positive pole of high voltage source afterwards.Support bar or inner ring also connect two bracing wires, and bracing wire to be through inside outer pillar and to be fixed on head place, can ensure that outside in the shaping advance process of pillar, the position of bracing frame is relatively stable like this.
Described annular metal electrode 21 is for being coated on the circulus of outer pillar outer surface, and annular metal electrode 21 is irony.By a pedestal, annular metal electrode 21 is fixed on a position in Fig. 4, prevents annular metal electrode to be moved by the active force of outer pillar.Pedestal can be insulated by insulator and ground.Annular metal electrode connects high-voltage conducting wires, and the other end of high-voltage conducting wires connects the negative pole of high voltage source.
Between the inner ring in the present embodiment, bracing frame 222 being arranged on to the gun barrel 8 of the cavity fluid injection between outer jacket 2 and copper pipe 7 and outer shroud, and support member should be set in one end that gun barrel 8 is relative with fluid injection end.When in order to gain in strength, when support bar is set to metallic plate, then offer some via holes mated with high-voltage conducting wires on a metal plate.
In order to pre-cooled to outer jacket, fix a ring-shaped water jacket at the head place of plastic extruder, while water jacket cooling outer jacket, also have certain supporting role to outer jacket, the interval, below of outer jacket arranges support wheel 23 simultaneously.
Embodiment 3
The distinctive points of the present embodiment and embodiment 2 is: as shown in Figure 5, bung body 102 and the Raw material pail 10 of air pressure material feeding bung is made as integrative-structure, and Raw material pail 10 only connects an import and export pipeline, i.e. air injection pipe 104.The internal diameter of air injection pipe 104 is greater than the external diameter of discharge nozzle 103, after discharge nozzle 103 being sleeved on air injection pipe 104 inside, is connected with Raw material pail 10 by air injection pipe 104.The end of air injection pipe 104 is communicated with the highest point at Raw material pail 10 top, and no longer to downward-extension, discharge nozzle 103 extends to the bottom of the staving 101 of Raw material pail 10.Be convenient to the position of human users in the side of Raw material pail 10, air injection pipe 104 outputs bypass by separator 111 from side, bypass is arranged pressure-reducing valve 105, and the end of bypass arranges the suction nozzle 109 connecting source of the gas; Discharge nozzle 103 stretches out from the position of separator 111.The end of the discharge nozzle 103 after separation arranges a discharging gate 110, the discharge nozzle 103 between discharging gate 110 and separator is connected to filter 106, arranges filter screen 108 in filter 106.Described separator 111 is for arranging the closed structure of the first connector, the second connector, the 3rd connector, wherein the first connector connects the pipeline that air injection pipe 104 arranges pressure-reducing valve 105, suction nozzle 109, second connector connects the pipeline that air injection pipe 104 is set with discharge nozzle 103, and discharge nozzle 103 passes separator 111 inside from the second connector and passes from the 3rd connector and connects filter 106.During actual use, the pipeline that discharge nozzle 103 both can flow out as stoste, also can as the feeding pipe injecting stoste in Raw material pail 10.
Claims (10)
1. the preparation system with One-step production insulating tube, described insulating tube comprises the steel pipe (7) successively arranged from inside to outside, heat-insulation layer, outer jacket (2), described preparation system comprises steel pipe market device, for the plastic extruder of shaping outer jacket, to the high pressure foaming machine (13) injecting the foaming stock solution forming heat-insulation layer between outer jacket and steel pipe, it is characterized in that: the discharge end that described plastic extruder forms outer jacket (2) is provided with corona treatment plant, described corona treatment plant comprises interior electrode, external electrode, high voltage source, interior electrode supporting is arranged on the inner surface of outer jacket (2), external electrode is coated on the outer surface of outer jacket (2).
2. the preparation system of a kind of One-step production insulating tube according to claim 1, it is characterized in that: the head place of described plastic extruder arranges the calibration sleeve (6) corresponding with the internal diameter of outer jacket (2), the side that calibration sleeve (6) stretches out the shaping outer jacket of plastic extruder arranges interior electrode, interior electrode comprises the copper mesh (5) sticking on calibration sleeve (6) outer ring surface, and copper mesh (5) connects the positive pole of high voltage source by the high-voltage conducting wires that passes calibration sleeve inner ring; The top of calibration sleeve (6) arranges external electrode, and dispatch from foreign news agency very waters the water applied on outer jacket (2), and the below of external electrode arranges water tank (9), and the bottom of water tank (9) is connected to the negative pole of high voltage source by high-voltage conducting wires.
3. the preparation system of a kind of One-step production insulating tube according to claim 2, is characterized in that: described copper mesh (5) is 80 ~ 100 object silk screens, wraps up polytetrafluoro pipe insulation layer outside high-voltage conducting wires.
4. the preparation system of a kind of One-step production insulating tube according to claim 3, it is characterized in that: be fixed with the absorbent material (3) preventing the water of external electrode from immersing head outside the head of described plastic extruder, the centre bore corresponding with the external diameter of outer jacket (2) is offered at the center of absorbent material (3).
5. the preparation system of a kind of One-step production insulating tube according to claim 4, it is characterized in that: described interior electrode comprises bracing frame (222) and the uniform bristle electrode (221) of solid matter, bracing frame (222) arranges the centre bore corresponding with the external diameter of steel pipe (7), the uniform bristle electrode (221) of solid matter in the form of a ring, radially be close-coupled on the outer shroud of bracing frame (222), the outside of outer shroud is all stretched out in the end of every root bristle electrode (221), the uniform bristle electrode (221) of solid matter stretches out the track formed outside outer shroud and mates with the internal diameter of outer pillar (2),
The annular metal electrode (21) of described dispatch from foreign news agency very ring set pillar outer surface outside, described annular metal electrode (21) is connected to the negative pole of high voltage source, and the uniform bristle electrode (221) of described solid matter is connected to the positive pole of high voltage source.
6. the preparation system of a kind of One-step production insulating tube according to claim 5, is characterized in that: described annular metal electrode (21) is fixed by pedestal, and support frame as described above (222) is fixed on plastic extruder by bracing wire (24).
7. the preparation system of a kind of One-step production insulating tube according to claim 6, is characterized in that: be provided with the frequency heating device of steel pipe (7) being carried out to preheating between described steel pipe market device and plastic extruder; Frequency heating device comprises intermediate frequency power supply, medium-frequency heating coil (11), sensor and controller, the rated power of described intermediate frequency power supply is 600kW, intermediate frequency power supply connects the medium-frequency heating coil (11) being preset in the outer surface of steel pipe, the side of the steel pipe of sensor setting after heating in medium frequency process (7), sensor, intermediate frequency power supply are all connected with controller.
8. the preparation system of a kind of One-step production insulating tube according to any one of claim 1 ~ 7, it is characterized in that: the foaming stock solution of described heat-insulation layer comprises isocyanates, the Raw material pail (10) of splendid attire isocyanates arranges air pressure material feeding bung, air pressure material feeding bung comprises bung body (102), be arranged on air injection pipe (104) on bung body (102) and discharge nozzle (103), air injection pipe (104) is communicated to the bung place of Raw material pail (10), and discharge nozzle (103) stretches into the bottom of Raw material pail (10).
9. the preparation system of a kind of One-step production insulating tube according to claim 8, it is characterized in that: described air injection pipe (104) is arranged pressure-reducing valve (105), discharge nozzle (103) is arranged filter (106), junction, the bung body (102) of described bung body (102) and Raw material pail (10) and between air injection pipe (104) and discharge nozzle (103), sealing ring (108) is set.
10. the preparation system of a kind of One-step production insulating tube according to claim 9, it is characterized in that: described bung body (102) and Raw material pail (10) are made as integrative-structure, the internal diameter of air injection pipe (104) is greater than the external diameter of discharge nozzle (103), one end that discharge nozzle (103) connects Raw material pail (10) is sleeved in air injection pipe (104), the other end of discharge nozzle (103) is separated with air injection pipe (104) by a separator (111), and the discharge nozzle (103) isolating air injection pipe (104) arranges filter (106).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420465302.1U CN204036792U (en) | 2014-08-18 | 2014-08-18 | A kind of preparation system of One-step production insulating tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420465302.1U CN204036792U (en) | 2014-08-18 | 2014-08-18 | A kind of preparation system of One-step production insulating tube |
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| Publication Number | Publication Date |
|---|---|
| CN204036792U true CN204036792U (en) | 2014-12-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420465302.1U Expired - Lifetime CN204036792U (en) | 2014-08-18 | 2014-08-18 | A kind of preparation system of One-step production insulating tube |
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| CN (1) | CN204036792U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109027524A (en) * | 2018-09-04 | 2018-12-18 | 唐山兴邦管道工程设备有限公司 | Can early warning insulating tube and one one-step production method, sizing cooling jacket and step molding machine |
| CN109648774A (en) * | 2019-01-28 | 2019-04-19 | 唐山兴邦管道工程设备有限公司 | A kind of insulating tube heating equipment |
-
2014
- 2014-08-18 CN CN201420465302.1U patent/CN204036792U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109027524A (en) * | 2018-09-04 | 2018-12-18 | 唐山兴邦管道工程设备有限公司 | Can early warning insulating tube and one one-step production method, sizing cooling jacket and step molding machine |
| CN109648774A (en) * | 2019-01-28 | 2019-04-19 | 唐山兴邦管道工程设备有限公司 | A kind of insulating tube heating equipment |
| CN109648774B (en) * | 2019-01-28 | 2024-01-09 | 唐山兴邦管道工程设备有限公司 | Insulating tube firing equipment |
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