Ozone aging test chamber

1.1.use way-The low concentration of ozone in the atmosphere is the main factor causing rubber cracking,This productSimulate and enhance ozone conditions in the atmosphere,Study on the effect of ozone on rubber,Method for rapid identification and evaluation of rubber's resistance to ozone aging and the protective efficacy of anti ozone agents.Reference standard:GB/T7762-2003Static tensile test formula for ozone cracking resistance of vulcanized rubber or thermoplastic rubberGB/T2951.21-2008General Test Methods for Cable Insulation and Sheath MaterialsGB/T 11206-2009Rubber aging test surface cracking method,The test methods specified in other relevant standards.

1.2.Principles and Methods-The experimental methods can be divided into "static" and "dynamic" according to the experimental methods and standards. Static refers to the sample being stretched and then placedtest chamberTo conduct testing, dynamic testing involves placing the sample intest chamberOn the fixture, conduct the test while stretching, and the fluctuation of the stretching is the test sample itself5%-45%左右

2、 Main technical parameters

2.1.Temperature range:5℃-70℃ Humidity range:20~98%

2.2.Temperature fluctuation: ±0.5Temperature distribution accuracy in ℃: ±2.0℃

2.3.Ozone concentration accuracy:10~1000pphm±10%

2.4.Sample rack lifting frequency:2R/min(optional)

2.5.Sample rack rotation speed：360Rotating sample holder(speed1~3Rotate per minute or choose adjustable)

3、 Structural features

3.1.knot Structure:Integrated machine.

a) 3.2.material quality-inner box: SUS304stainless steel plate

b) outer box: SUS304Stainless steel plate or baked paint (off white).

c) insulation:Rigid polyurethane foam+Aluminum silicate insulation cotton for dual protection.

a) 3.3.box door-single door,Turn left.

b) window frame/Two silicone rubber sealing strips and anti condensation electric heating device for door frame.

c) Observation windows on top of doors and windowsW300xH450Mm, lighting fixtures.

3.4.Requirements for sample rack

a) (Dynamic experiment; selection)-Fix the two ends of the sample with a fixture under the required elongation, and when in contact with ozone air, the length direction of the sample should be basically parallel to the direction of the airflow

b) The fixture should be made of materials that are not easily decomposed by ozone(For example, aluminum)make.

c) Rotate the sample at a speed of(20^-25) mm/sBetween them, in a plane perpendicular to the dry airflow, each specimen moves continuously along the same path

d) The time for the same sample to rotate once is(8^-12) min.The minimum scanning area of the sample is the effective area of the test chamber40%.

e) Sample preparation should comply withGB/T 9865.1The regulations. It is best to cut the sample from the newly molded test piece, and if necessary, it can be cut from the finished product. The sample should meet at least one test condition3A sample. The width of the long standard specimen shall not be less than10mm, thickness2.Ommscholar0.2mmThe length of the specimen between the two ends of the fixture before stretching shall not be less than40mm.

Standard static testing fixture-

a) 3.5.Control Panel-Controller display screen

b) power switch

c) Lighting button,

a) 3.6.Box configuration-Internally equipped with stainless steelSUS #304One storage rack turntable

b) φ50mmLead holeLead hole:1One,And equipped with hole covers and silicone rubber plugs.

c) Mobile wheels4only

d) Horizontal fixed tripod4only

e) There is a drainage hole located at the bottom of the rear of the box,To facilitate the drainage of condensate water from the unit;

4、 Air circulation regulation

4.1.adjustment method

4.2.circulating fan-FLOW THROWair supply mode;Horizontal diffusion, vertical heat exchange, arc-shaped cycle.

Energy saving motor+Stainless steel extended axis connected multi centrifugal circulating fan.

5heating system

5.1.Heater

5.2.Control method-Fin type heat dissipation tube shaped stainless steel electric heater for heating.

-IDRegulating and executing components: solid-state relays.

VIrefrigeration system

6.1.working method:Mechanical refrigeration/Air cooled type.

6.2.Control method:The controller of the control system automatically adjusts the operating conditions of the refrigeration machine according to the test conditions.

6.3.compressor:Famous European and American brand low-temperature and high-efficiency fully enclosed compressor. (France; Taikang)

6.4.Evaporator:Fin type multi-stage automatic load capacity adjustment. (Japan; Egret Palace)

6.5.Condenser:Wind condenser. (Japan; Shuangling)

6.6.expansion system:Freezing system with automatic capacity control

6.7.refrigerant:environmentally friendly refrigerantR404The ozone depletion index is0）. (United States; DuPont)

6.8.Refrigeration process:Nitrogen shielded welding,Double stage rotary vane pump for vacuum pumping,Ensure the internal cleanliness of the refrigeration system, design a water tray at the bottom of the compressor, and discharge condensed water outside the box through the drainage pipe at the back of the box.

a) 6.9.Refrigeration accessories:expansion valve (Denmark;DANFOSS）

b) solenoid valve （Japan; Omron)

c) filter （Denmark;DANFOSS）

d) pressure controller （Denmark;DANFOSS）

e) globe valve (Italy;CASTEL）

f) Oil separator (Europe and America;ALCO）

6.10.Appendix document:desiccant,Oil separator, refrigerant flow window,Repair it,High voltage protection switch..

seven、Ozone detection system

7.1ozone generator-(Generating ozone using a voltage silent discharge tube

7.2Ozone sensor-Imported ozone concentration sensor from the UK, capable of achieving precise control

7.3Ozone exhaust system-After the experiment is completed, the ozone inside the experimental box is discharged to the outside through a dedicated exhaust fan and duct

7.4Ozone flow regulator-Using high-precision glass flow rotor meter for precise measurement

adjust

eighty percent、control system

7.1.biography feel device:(Generating ozone using a voltage silent discharge tube

7.2.control manufacture device:Imported ozone concentration sensor from the UK, capable of achieving precise control

The temperature sensor is made of platinumDIN PT-100ΩAdopting South KoreaTEMI,7Inch colorLCDTouch based human-machine interface controller,Ultra large field of view image,Equipped with screen lock(LOCK)function.Switch between Chinese and English

7.3.Controller specifications-precision:±0.1℃＋1digit.

a) temperature resolution: 0.1.

b) Set range for each time period:0~530Hours can be freely set.

c) Temperature input force signal platinumPT100type.

d) P.I.DControl parameter setting,P. I.DAutomatic calculation.

a) 7.4.Screen display function-Using graphic control software for visual dialogue,Screen direct touch options: including program settings, curve display, historical data, manual operation, automatic operation, auxiliary settings, etc.

b) Display execution status, temperature and time settings, remaining time, and remaining number of cycles.

c) Having a separate program editing screen,Can input temperature,Time and number of cycles.

d) Temperature program settings displayed as graphical curves,Real time display of program curve execution function.

e) Display the fault status and explain the troubleshooting methods.

f) Temperature setting（SV）Compared to reality（PV）The value is displayed directly.

g) The screen can be adjusted for backlight,The screen display protection function can be timed,Close the settings.

7.5.Program capacity and

a) control function-The production of the program adopts a conversational function.

b) number of cycles:reachable1-9999Secondary adjustable.

c) Can use program groups:maximum50aPATTEN(i.e50Each test specification can be independently set and stored

d) Having power-off program memory,Automatically start and continue executing program functions after power restoration.

e) Real time display of graphical curves during program execution.

f) Equipped with scheduled startup and shutdown functions.

g) Having a date,Time adjustment function.