CN104198134B - A kind of expansion tank leak-testing apparatus and detection method thereof - Google Patents
A kind of expansion tank leak-testing apparatus and detection method thereof Download PDFInfo
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- CN104198134B CN104198134B CN201410423043.0A CN201410423043A CN104198134B CN 104198134 B CN104198134 B CN 104198134B CN 201410423043 A CN201410423043 A CN 201410423043A CN 104198134 B CN104198134 B CN 104198134B
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Abstract
The invention belongs to detection field of mechanical technique, be specifically related to a kind of expansion tank leak-testing apparatus and detection method thereof.Checkout equipment comprises multiple expansion tank to be detected, frame, grip device and water feed apparatus; Wherein, expansion tank to be detected is made up of glass fiber reinforced plastics composite material, glass fiber reinforced plastics composite material becomes to be grouped into primarily of following parts by weight: novolac resin: 20-40 part, FB resin: 10-20 part, glass fibre: 40-60 part, filler: 5-15 part, hardening agent: 1-3 part, coupling agent: 1-3 part, aging resister: 1-3 part; This expansion tank quality is light, and intensity is high, good corrosion resistance, one-shot forming good integrity, good airproof performance, and cost is low, and the cycle is short, and economic effect is given prominence to.This equipment detection method comprises clamping, water inlet, pressurize and draining, and accuracy and detection efficiency are all higher.
Description
Technical field
The invention belongs to detection field of mechanical technique, be specifically related to a kind of expansion tank leak-testing apparatus and detection method thereof.
Background technology
Expansion tank is the vitals in hot water system and central air-conditioning waterway system, its effect is the breathing amount of water in collecting and bucking-out system, be widely used in the equipment such as central air conditioner, boiler, water heater, frequency conversion, constant pressure water supply, the fluctuation of its energy buffer system pressure, play the effect of voltage stabilizing off-load, when in system, hydraulic pressure slightly changes, the automatic expansion contraction of expansion tank air bag can have certain buffer action to the change of hydraulic pressure, can ensure the stable water pressure of system, water pump can not be opened frequently because of the change of pressure.
Therefrom visible, the sealing property of expansion tank is very important, and reveal if expansion tank air bag exists, namely sealing property is bad, can make equipment because of the instability of the excessive or hydraulic pressure of pressure causes damage, therefore needs a kind of equipment that can detect expansion tank sealing property.
Summary of the invention
The object of this invention is to provide a kind of can automatically control and detect the whether good equipment of expansion tank sealing property, and detection system and the detection method of accuracy of detection and detection efficiency can be improved.
To achieve these goals, an aspect of of the present present invention provides a kind of expansion tank leak-testing apparatus, comprising:
Multiple expansion tank to be detected, described expansion tank is made up of glass fiber reinforced plastics composite material, described glass fiber reinforced plastics composite material becomes to be grouped into primarily of following parts by weight: novolac resin: 20-40 part, FB resin: 10-20 part, glass fibre: 40-60 part, filler: 5-15 part, hardening agent: 1-3 part, coupling agent: 1-3 part, aging resister: 1-3 part;
Frame, described frame comprises top panel and lower panel, and top panel is provided with the touch-screen for running whole checkout equipment, and described lower panel comprises operator's console one and operator's console two, and described operator's console one is provided with grip device;
Grip device, described grip device comprises the cylinder block be installed in frame, be installed on the cylinder on cylinder block and be arranged at above operator's console one and be positioned at the water tank seat of cylinder lower end;
Water feed apparatus, described water feed apparatus comprises the tank and water pump that are arranged at lower panel inside, and for the water tank toward water filling in expansion tank, between described tank and water pump, connected by water pipe between water pump and water tank and between tank and expansion tank, and manual ball valve and seal valve are installed between water tank and expansion tank; The surplus valve of electric control is installed between tank and expansion tank; Detected expansion tank is positioned on water tank seat, and during detection, cylinder compresses expansion tank downwards, is docked by water pipe with expansion tank, and water pump starts to intake in expansion tank;
Wherein, detected expansion tank is positioned on water tank seat, and during detection, cylinder compresses expansion tank downwards, is docked by water pipe with expansion tank, and water pump starts to intake in expansion tank.And the expansion tank that the present invention is detected is made up of above-mentioned glass fiber reinforced plastics composite material, the expansion tank made with alloy materials such as stainless steels in prior art, the expansion tank quality that the present invention is detected is light, the 20-25% of the expansion tank approximately only having steel to make, but the expansion tank that intensity is but made with steel is close, even higher, steel can be replaced completely to prepare expansion tank.And the present invention's glass fiber reinforced plastics composite material to prepare the technique of expansion tank simple, can one-shot forming, good integrity, compared with preparing expansion tank with alloy materials such as steel, do not need to carry out metalworking technique, saved the cost of equipment such as manufacturing procedure and process tool greatly, cost is low, cycle is short, and economic effect is given prominence to.In addition, the expansion tank corrosion resistance that the present invention makes is very good, has good resistivity, expand the range of application of expansion tank of the present invention to the acid of air, water and general concentration, alkali, salt and multiple oils and solvent.
And, the glass fiber reinforced plastics composite material compatibility that the present invention prepares expansion tank is reasonable, FB resin decomposition temperature >500 DEG C in raw material, oxygen index 48.5, to glass fibre, fillers etc. have excellent adhesive property, by it and the blended use of novolac resin, by glass fibre, the raw materials such as filler are bonded together, make and can bear tension, bending, the hard expansion tank goods of compression and shear stress, and the working temperature of article swells water tank can be increased substantially, there will not be temperature at high temperature or after long-term work to raise and make the performances such as intensity occur the problem obviously declined.In addition, catabiosis is the common defects of the goods such as plastics, fiberglass, and the aging rear hydraulic performance decline easily causing goods, so the present invention adds aging resister to delay the aging of article swells water tank in the formula of glass fiber reinforced plastics composite material, make its longer service life, and aging resister can select the commercially available aging resister meeting arbitrarily application claims.
In above-mentioned a kind of expansion tank leak-testing apparatus, described glass fibre is one or more in S-1 glass fibre, S-2 glass fibre, S-3 glass fibre; The diameter of described glass fibre is 3-8 μm, and length is 5-10mm.S Series glass fiber selected by the present invention is high strength glass fiber, and it has the advantage of obvious performance compared to simple glass fiber (as E glass fibre).As the primary raw material of glass fiber reinforced plastics composite material, the more obvious S Series glass fiber of selectivity advantage of the present invention, makes the performance of its article swells water tank more superior.
In above-mentioned a kind of expansion tank leak-testing apparatus, described filler is one or more in porcelain earth, talcum powder, calcium carbonate; The particle diameter of described filler is 1-3 μm.Filler mainly plays filling, strengthens the performances such as intensity, reduces costs, select the less filler of particle size range so as not to goods because of particle diameter excessive, cause article swells water tank inside to there is space, in conjunction with the defect such as not tight, also prevent rough problem.
In above-mentioned a kind of expansion tank leak-testing apparatus, described hardening agent is one or both in urotropine, hexamethylene tetramine.Because novolac resin self does not possess the ability of solidification, therefore need to add hardening agent urotropine and hexamethylene tetramine, in the process of they and phenolics hot melt, all can decomposite methylene, play crosslinked action, impel novolac resin to solidify.Certainly, its consumption can not very little can not be excessive, and very little, resin solidification crosslinking degree is inadequate, then the performance such as intensity of article swells water tank is lower; Excessive, then can make resin crosslinks overreact, there is more defect, produce obvious fragility, also can cause the decline of the performances such as the intensity of article swells water tank, toughness.So the amount of the addition foundation novolac resin of the present invention of hardening agent controls in above-mentioned scope.
In addition, can also add the promoter of 0.5-1.5 part and hardening agent with the use of, accelerate the cross-linking reaction between novolac resin and hardening agent, reduce solidification temperature, shorten set time.Promoter preferential oxidation magnesium, particle diameter is 1-3 μm.
In above-mentioned a kind of expansion tank leak-testing apparatus, described coupling agent is one or more in silane coupling agent, titanate coupling agent.Coupling agent in fiber surface generation exchange reaction, also can react with resin, well be dissolved in the surface of resin, thus improve the cohesive force of interlayer, improves the shear resistance of goods.
In addition, the present invention can also add 10-20 part reinforcing fiber in the raw materials glass fiber reinforced plastics composite material of expansion tank, and the diameter of reinforcing fiber is also 3-8 μm, and length is also 5-10mm.Reinforcing fiber can be one or more in carbon fiber, boron fibre, aramid fiber, alumina fibre, silicon carbide fibre, and these high performance reinforcing fibers can strengthen the performances such as the intensity of glass fiber reinforced plastics composite material article swells water tank of the present invention further.
In above-mentioned a kind of expansion tank leak-testing apparatus, the preparation method of described expansion tank comprises the following steps:
Mixed ingredients: take raw material by the constituent of above-mentioned expansion tank and parts by weight thereof, put in high-speed mixer and mix;
Granulation: the above-mentioned material mixed is put into double screw extrusion machine feed hopper, is fed in double screw extrusion machine by feed hopper, extrudes, obtain pellet by granulator granulation from the head of double screw extrusion machine;
Injection moulding: pellet obtained above is joined in the barrel of injection machine, is heated to molten condition, then by the raw material of molten condition through nozzle injection in the mould of expansion tank, obtain expansion tank through pressurize, cooling forming, die sinking.
In above-mentioned a kind of expansion tank leak-testing apparatus, in described granulation process, double screw extrusion machine temperature is set in 230-290 DEG C, rotating speed 20-60r/min.
In above-mentioned a kind of expansion tank leak-testing apparatus, in described injection moulding process, nozzle temperature is 250-300 DEG C, mold temperature is 120-160 DEG C, and expulsion pressure is 80-100MPa, and injecting time is 3-8s, dwell pressure is 50-70MPa, and the dwell time is 30-80s, and cool time is 1-3min.
In above-mentioned a kind of expansion tank leak-testing apparatus, described operator's console two is provided with drying device, described drying device comprises expansion tank and fixes mounting, places expansion tank and fix the holder for fixed expansion water tank on mounting and be positioned over holder, and wait for airing detected after expansion tank.
Another object of the present invention is to provide a kind of detection method applying above-mentioned checkout equipment, comprises the following steps:
Clamping: detected expansion tank is placed on water tank seat, water pipe is docked with detected expansion tank, press the start button on touch-screen, cylinder is pushed down downwards and is compressed detected expansion tank;
Water inlet: open manual ball valve and seal valve, water tank is to detected expansion tank water filling until reach the default flooding time of equipment, now equipment can judge the force value in detected expansion tank, if force value is lower than the minimum pressure of testing requirement, and display alarm information on touch-screen; If force value is higher than the highest setting value, then controlling water kick valve is opened, and unnecessary water is flow back to tank;
Pressurize: close seal valve, and the force value in detected expansion tank is monitored, if the force value after pressurize is lower than force value 5KPa in dwell time section, now warning message on touch-screen in the dwell time section preset;
Draining: detect complete, closes seal valve, closing outflow valve, disconnects the water pipe that is connected with expansion tank, cylinder recovery initial position, the expansion tank after detection to be placed on drying device draining to tank.
The present invention compared with prior art has the following advantages:
1. the present invention utilizes programmed control checkout equipment to test the process of expansion tank sealing, improve accuracy of detection, by to water filling in detected expansion tank, real-time pressure in test and monitoring expansion tank judges whether expansion tank exists leakage, and show testing result on the touchscreen, use touch-screen to be conveniently man-machine interaction, so greatly reduce detection time, improve detection efficiency.
2. the expansion tank that the present invention is to be detected is made up of glass fiber reinforced plastics composite material, quality is light, intensity is high, and corrosion resistance is very good, good resistivity is had to the acid of air, water and general concentration, alkali, salt and multiple oils and solvent, steel can be replaced completely to prepare expansion tank, expand the range of application of expansion tank of the present invention.
3. to prepare the glass fiber reinforced plastics composite material compatibility of expansion tank reasonable in the present invention, make the hard expansion tank goods that can bear tension, bending, compression and shear stress, and the working temperature of article swells water tank can be increased substantially, to there will not be at high temperature or after long-term work, temperature raises and makes the performances such as intensity occur the problem obviously declined.
4. to prepare the technique of expansion tank simple for the present invention's glass fiber reinforced plastics composite material, one-shot forming, good integrity, compared with preparing expansion tank with alloy materials such as steel, do not need to carry out metalworking technique, saved the cost of equipment such as manufacturing procedure and process tool greatly, cost is low, cycle is short, and economic effect is given prominence to.
5. expansion tank of the present invention is obtained by glass fiber reinforced plastics composite material one-shot forming, and sealing is very good.
Accompanying drawing explanation
Fig. 1 is the explosive view of present device;
Fig. 2 is the schematic diagram that the present invention detects.
In figure: water tank 100; Frame 200; Grip device 300; Water feed apparatus 400; Top panel 210; Lower panel 220; Touch-screen 211; Operator's console 1; Operator's console 2 222; Cylinder block 310; Cylinder 320; Water tank seat 330; Tank 410; Water pump 420; Water tank 430; Water pipe 440; Manual ball valve 450; Seal valve 460; Surplus valve 470; Drying device 500; Fixing mounting 510; Holder 520;
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, a kind of expansion tank leak-testing apparatus, comprising: multiple expansion tank 100 to be detected, frame 200, grip device 300, water inlet combination 400 and drying device 500.
Frame 200 comprises top panel 210 and lower panel 220, and top panel 210 is provided with touch-screen 211, and described lower panel 220 comprises operator's console 1 and operator's console 2 222, and described operator's console 1 is provided with grip device 300.
Grip device 300 comprises the cylinder block 310 be installed in frame 100, be installed on the cylinder 320 on cylinder block 310 and be arranged at above operator's console 1 and be positioned at the water tank seat 330 of cylinder 320 lower end.
Water feed apparatus 400 comprises the tank 410 and water pump 420 that are arranged at lower panel 220 inside, and for the water tank 430 toward water filling in expansion tank 100, between described tank 410 and water pump 420, connected by water pipe 440 between water pump 420 and water tank 430 and between tank 410 and expansion tank 100, and manual ball valve 450 and seal valve 460 are installed between water tank 430 and expansion tank 100; The surplus valve 470 of electric control is installed between tank 410 and expansion tank 100, wherein detected expansion tank 100 is positioned on water tank seat 330, during detection, cylinder 320 compresses expansion tank 100 downwards, docked with expansion tank 100 by water pipe 440, water pump 420 starts to intake in expansion tank 100.
Operator's console two is provided with drying device 500, drying device 500 comprises expansion tank 100 and fixes mounting 510, places expansion tank and fix the holder 520 for fixed expansion water tank 100 on mounting 510 and be positioned over holder 520, and wait for airing detected after expansion tank 100.
As shown in Figure 2, present invention also offers a kind of detection method applying above-mentioned checkout equipment:
Clamping: detected expansion tank 100 is placed on water tank seat 330, water pipe 440 is docked with detected expansion tank 100, presses the start button on touch-screen 211, cylinder 320 is pushed down downwards and is compressed detected expansion tank 100;
Water inlet: open manual ball valve 450 and seal valve 460, water tank 430 is to the water filling of detected expansion tank 100 until reach the default flooding time of equipment, now equipment can judge the force value in detected expansion tank 100, if force value is lower than the minimum pressure of testing requirement, display alarm information on touch-screen 211; If force value is higher than the highest setting value, then controlling water kick valve 470 is opened, and unnecessary water is flow back to tank 410.
Pressurize: close seal valve 460; and in the dwell time section preset, the force value in detected expansion tank 100 is monitored; if the force value after pressurize is lower than force value 5KPa in dwell time section, then system alarm is shut down, now display alarm information on touch-screen 211.
Draining: detect complete, closes seal valve 460, closing outflow valve 470, and disconnect the water pipe 440 that is connected with expansion tank 100, cylinder 320 recovers initial position, the expansion tank 100 after detection to be placed on drying device 500 draining to tank 410.
Realization of the present invention is the process utilizing programmed control checkout equipment to test expansion tank sealing, improve accuracy of detection, by to water filling in detected expansion tank, real-time pressure in test and monitoring expansion tank judges whether expansion tank exists leakage, and show testing result on the touchscreen, use touch-screen to be conveniently man-machine interaction, so greatly reduce detection time, improve detection efficiency.
Above-mentioned expansion tank to be detected is made up of glass fiber reinforced plastics composite material, glass fiber reinforced plastics composite material becomes to be grouped into primarily of following parts by weight: novolac resin: 20-40 part, FB resin: 10-20 part, glass fibre: 40-60 part, filler: 5-15 part, hardening agent: 1-3 part, coupling agent: 1-3 part, aging resister: 1-3 part.Wherein glass fibre, filler and promoter, reinforcing fiber carry out mixed at high speed with other component after all can infiltrating 24-48 hour at the liquid oligomeric phenolics being added with surfactant again.
Table 1: the constituent of embodiment of the present invention 1-5 expansion tank and parts by weight thereof
Embodiment 1:
Take raw material by the constituent of embodiment in table 11 expansion tank and parts by weight thereof, in raw material, the particle diameter of powder is 1-2 micron, and the diameter of fiber is 3-5 μm, and length is 5-8mm, puts in high-speed mixer and mixes.Then the material mixed is put into double screw extrusion machine feed hopper; fed in double screw extrusion machine by feed hopper, double screw extrusion machine temperature is set in 230-260 DEG C, rotating speed 20r/min; extrude from the head of double screw extrusion machine, obtain pellet by granulator granulation.
Then the pellet obtained is joined in the barrel of injection machine, be heated to molten condition, and be that the nozzle of 250 DEG C is ejected in the mould of expansion tank under pressure is 80MPa condition through temperature by the raw material of molten condition, injecting time is 8s, and mould is heated to 120 DEG C in advance.Finally pressurize 80s under pressure is 50MPa condition, cooling 1min, shaping, die sinking obtains expansion tank.
Embodiment 2:
Take raw material by the constituent of embodiment in table 12 expansion tank and parts by weight thereof, in raw material, the particle diameter of powder is 1-2 micron, and the diameter of fiber is 4-6 μm, and length is 6-8mm, puts in high-speed mixer and mixes.Then the material mixed is put into double screw extrusion machine feed hopper; fed in double screw extrusion machine by feed hopper, double screw extrusion machine temperature is set in 240-280 DEG C, rotating speed 40r/min; extrude from the head of double screw extrusion machine, obtain pellet by granulator granulation.
Then the pellet obtained is joined in the barrel of injection machine, be heated to molten condition, and be that the nozzle of 280 DEG C is ejected in the mould of expansion tank under pressure is 90MPa condition through temperature by the raw material of molten condition, injecting time is 6s, and mould is heated to 140 DEG C in advance.Finally pressurize 50s under pressure is 65MPa condition, cooling 2min, shaping, die sinking obtains expansion tank.
Embodiment 3:
Raw material is taken by the constituent of embodiment in table 13 expansion tank and parts by weight thereof, and taking 0.5 part of promoter magnesium oxide and 10 parts of reinforcement carbon fibers, in raw material, the particle diameter of powder is 1-2 micron, and the diameter of fiber is 4-6 μm, length is 6-8mm, puts in high-speed mixer and mixes.Then the material mixed is put into double screw extrusion machine feed hopper; fed in double screw extrusion machine by feed hopper, double screw extrusion machine temperature is set in 240-280 DEG C, rotating speed 40r/min; extrude from the head of double screw extrusion machine, obtain pellet by granulator granulation.
Then the pellet obtained is joined in the barrel of injection machine, be heated to molten condition, and be that the nozzle of 280 DEG C is ejected in the mould of expansion tank under pressure is 90MPa condition through temperature by the raw material of molten condition, injecting time is 6s, and mould is heated to 140 DEG C in advance.Finally pressurize 50s under pressure is 65MPa condition, cooling 2min, shaping, die sinking obtains expansion tank.
Embodiment 4:
Raw material is taken by the constituent of embodiment in table 14 expansion tank and parts by weight thereof, and taking 1 part of promoter magnesium oxide and 15 parts of reinforcement aramid fibers, in raw material, the particle diameter of powder is 2-3 micron, and the diameter of fiber is 5-8 μm, length is 7-9mm, puts in high-speed mixer and mixes.Then the material mixed is put into double screw extrusion machine feed hopper; fed in double screw extrusion machine by feed hopper, double screw extrusion machine temperature is set in 250-290 DEG C, rotating speed 50r/min; extrude from the head of double screw extrusion machine, obtain pellet by granulator granulation.
Then the pellet obtained is joined in the barrel of injection machine, be heated to molten condition, and be that the nozzle of 280 DEG C is ejected in the mould of expansion tank under pressure is 95MPa condition through temperature by the raw material of molten condition, injecting time is 5s, and mould is heated to 150 DEG C in advance.Finally pressurize 45s under pressure is 68MPa condition, cooling 2min, shaping, die sinking obtains expansion tank.
Embodiment 5:
Raw material is taken by the constituent of embodiment in table 15 expansion tank and parts by weight thereof, and take 1.5 parts of promoter magnesium oxide and 20 parts of reinforcement silicon carbide fibres, in raw material, the particle diameter of powder is 2-3 micron, the diameter of fiber is 6-8 μm, length is 8-10mm, puts in high-speed mixer and mixes.Then the material mixed is put into double screw extrusion machine feed hopper; fed in double screw extrusion machine by feed hopper, double screw extrusion machine temperature is set in 240-290 DEG C, rotating speed 60r/min; extrude from the head of double screw extrusion machine, obtain pellet by granulator granulation.
Then the pellet obtained is joined in the barrel of injection machine, be heated to molten condition, and be that the nozzle of 300 DEG C is ejected in the mould of expansion tank under pressure is 100MPa condition through temperature by the raw material of molten condition, injecting time is 3s, and mould is heated to 160 DEG C in advance.Finally pressurize 30s under pressure is 70MPa condition, cooling 3min, shaping, die sinking obtains expansion tank.
The expansion tank that embodiment of the present invention 1-5 is obtained carries out Mechanics Performance Testing, and test result is as shown in table 2.
The mechanical experimental results of the expansion tank that table 2: embodiment of the present invention 1-5 obtains
As known from Table 2, the expansion tank excellent in mechanical performance that the present invention adopts the rational glass fiber reinforced plastics composite material of compatibility to make, the expansion tank that the alloy materials such as stainless steel are made can be substituted completely, and quality is light, good corrosion resistance, preparation technology is simple, the cycle is short, cost is low, pass through one-shot forming, good integrity, sealing is excellent, and economic effect is given prominence to.
The expansion tank that embodiment of the present invention 1-5 is obtained adopts expansion tank leak-testing apparatus of the present invention and detection method thereof to test its sealing property, all reaches test request, and sealing effectiveness is given prominence to.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Claims (6)
1. an expansion tank leak-testing apparatus, is characterized in that, comprising:
Multiple expansion tank to be detected, described expansion tank is made up of glass fiber reinforced plastics composite material, described glass fiber reinforced plastics composite material becomes to be grouped into primarily of following parts by weight: novolac resin: 20-40 part, FB resin: 10-20 part, glass fibre: 40-60 part, filler: 5-15 part, hardening agent: 1-3 part, coupling agent: 1-3 part, aging resister: 1-3 part; Described glass fibre is one or more in S-1 glass fibre, S-2 glass fibre, S-3 glass fibre; The diameter of described glass fibre is 3-8 μm, and length is 5-10mm;
Frame, described frame comprises top panel and lower panel, and top panel is provided with the touch-screen for running whole checkout equipment, and described lower panel comprises operator's console one and operator's console two, and described operator's console one is provided with grip device, and described operator's console two is provided with drying device;
Grip device, described grip device comprises the cylinder block be installed in frame, be installed on the cylinder on cylinder block and be arranged at above operator's console one and be positioned at the water tank seat of cylinder lower end;
Drying device, described drying device comprises expansion tank and fixes mounting, places expansion tank and fix the holder for fixed expansion water tank on mounting and be positioned over holder, and wait for airing detected after expansion tank;
Water feed apparatus, described water feed apparatus comprises the tank and water pump that are arranged at lower panel inside, and for the water tank toward water filling in expansion tank, between described tank and water pump, connected by water pipe between water pump and water tank and between tank and expansion tank, and manual ball valve and seal valve are installed between water tank and expansion tank; The surplus valve of electric control is installed between tank and expansion tank; Detected expansion tank is positioned on water tank seat, and during detection, cylinder compresses expansion tank downwards, is docked by water pipe with expansion tank, and water pump starts to intake in expansion tank; Wherein detect the method for expansion tank sealing, comprise the following steps:
Clamping: detected expansion tank is placed on water tank seat, water pipe is docked with detected expansion tank, press the start button on touch-screen, cylinder is pushed down downwards and is compressed detected expansion tank;
Water inlet: open manual ball valve and seal valve, water tank is to detected expansion tank water filling until reach the default flooding time of equipment, now equipment can judge the force value in detected expansion tank, if force value is lower than the minimum pressure of testing requirement, and display alarm information on touch-screen; If force value is higher than the highest setting value, then controlling water kick valve is opened, and unnecessary water is flow back to tank;
Pressurize: close seal valve, and the force value in detected expansion tank is monitored, if the force value after pressurize is lower than force value 5KPa in dwell time section, now warning message on touch-screen in the dwell time section preset;
Draining: detect complete, closes seal valve, closing outflow valve, disconnects the water pipe that is connected with expansion tank, cylinder recovery initial position, the expansion tank after detection to be placed on drying device draining to tank.
2. a kind of expansion tank leak tightness testing equipment according to claim 1, is characterized in that, described filler is one or more in porcelain earth, talcum powder, calcium carbonate; The particle diameter of described filler is 1-3 μm.
3. a kind of expansion tank leak tightness testing equipment according to claim 1, is characterized in that, described coupling agent is one or more in silane coupling agent, titanate coupling agent.
4. a kind of expansion tank leak tightness testing equipment according to claim 1, it is characterized in that, the preparation method of described expansion tank comprises the following steps:
Mixed ingredients: take raw material by the constituent of expansion tank described in claim 1 and parts by weight thereof, put in high-speed mixer and mix;
Granulation: the above-mentioned material mixed is put into double screw extrusion machine feed hopper, is fed in double screw extrusion machine by feed hopper, extrudes, obtain pellet by granulator granulation from the head of double screw extrusion machine;
Injection moulding: pellet obtained above is joined in the barrel of injection machine, is heated to molten condition, then by the raw material of molten condition through nozzle injection in the mould of expansion tank, obtain expansion tank through pressurize, cooling forming, die sinking.
5. a kind of expansion tank leak tightness testing equipment according to claim 4, it is characterized in that, in described granulation process, double screw extrusion machine temperature is set in 230-290 DEG C, rotating speed 20-60r/min.
6. a kind of expansion tank leak tightness testing equipment according to claim 4, it is characterized in that, in described injection moulding process, nozzle temperature is 250-300 DEG C, and mold temperature is 120-160 DEG C, and expulsion pressure is 80-100MPa, injecting time is 3-8s, dwell pressure is 50-70MPa, and the dwell time is 30-80s, and cool time is 1-3min.
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| CN1505752A (en) * | 2001-04-23 | 2004-06-16 | ̩���������ֶ��عɼ����ڹ�˾ | Method and device for detecting a leak in a heat exchanger, especially a plate-type heat exchanger |
| CN1730549A (en) * | 2005-08-29 | 2006-02-08 | 河北衡兴环保设备工程有限公司 | Modified ,high temperature resistant glass fibre reinforced plastic |
| CN102175406A (en) * | 2011-01-27 | 2011-09-07 | 中交四航工程研究院有限公司 | Test system and test method for water tightness test of tunnel deformation joint waterstop |
| CN103160068A (en) * | 2011-12-16 | 2013-06-19 | 常熟市发东塑业有限公司 | Phenolic glass fiber reinforced plastic composite material |
| CN103017988A (en) * | 2012-12-01 | 2013-04-03 | 山东统亚模塑科技实业有限公司 | Expansion vessel airtightness detecting system for automobile |
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| CN104198134A (en) | 2014-12-10 |
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Inventor after: Shang Weiyan Inventor after: Sheng Hanjiao Inventor after: Peng Hongda Inventor after: Qiu Min Inventor after: Zhao Jing Inventor before: Chen Xiaoping Inventor before: Hu Rufu Inventor before: Sheng Hanjiao Inventor before: Peng Hongda Inventor before: Zhao Jing Inventor before: Qiu Min |
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