CQL-150 ozone aging test chamber has precise temperature control

With the rapid development of modern industrial technology, the application fields of rubber and plastic products are becoming increasingly broad, and the environmental conditions they are subjected to are becoming more and more complex and diverse. Only by reasonably stipulating the environmental conditions of the product and correctly selecting the environmental protection measures for the product can we ensure that the product is protected from damage during storage and transportation and is safe and reliable during use.
Ozone content in the atmosphere is very small but it is the main factor causing rubber cracks. The ozone aging chamber simulates and strengthens ozone conditions in the atmosphere, studies the action of ozone on rubber, and quickly identifies and evaluates the anti-ozone aging performance of rubber. and anti-ozonant protective effects, and then take effective anti-aging measures to extend the service life of rubber products. The imported ozone generator used in the equipment adopts medium frequency and high voltage power supply mode, and the quartz glass tube electrode is welded. The ozone concentration generated is stable. It is mixed with a certain amount of treated air in the device and then sent to the test chamber. UV ozone concentration is detected. The instrument feeds back the ozone concentration continuously detected online to the ozone generator control system, so that the control system can effectively control the generation of ozone according to the set value, so that the test chamber maintains an appropriate ozone concentration. The control system adopts programmable controller. In addition, the heating and humidification system works to meet all temperature and humidity test conditions.
Ozone aging test equipment can be used for rubber products such as vulcanized rubber, thermoplastic rubber, cable insulation sheaths and other products, under static stretching or continuous dynamic stretching deformation, or under intermittent dynamic stretching and static stretching Under alternating deformation, the sample is exposed to a closed, non-illuminated air containing constant ozone concentration and a constant temperature test chamber. The sample is tested at a predetermined time to evaluate the degree of cracks or other performance changes that occur on the surface of the sample. Ozone aging resistance of rubber.
Static tensile test
The standard stipulates that the two ends of the sample are clamped on special clamps, and an elongation rate is selected for stretching, usually %. The clamp is installed on a rotating sample rack, and the sample rack rotates at/ The test is carried out at a temperature of ℃, a relative humidity not greater than %, and a specified ozone concentration. After the specified time, check the cracks of the sample. General wire and cable ozone concentration selection (%).
Reference and implementation standards
Dynamic tensile test method for ozone aging resistance test of vulcanized rubber
Static tensile test method for ozone cracking resistance of vulcanized rubber or thermoplastic rubber
. Cable insulation and sheath materials General test methods
Special test methods for elastomer mixtures (high concentration ozone aging method)
and other test methods specified in relevant standards.
Main technical parameters
. Model studio size (DH) Overall dimensions (DH) Power
Qdh
Qdh
Qdh
Qdh
Qdh
Qdh
&. Temperature range: R+℃～℃
&. Temperature uniformity: &℃
&. Temperature fluctuation: .℃ /H
&. Temperature deviation: &℃
&. Time setting range: ~ hours
&. Ozone concentration: ~ (generally required concentration for wires and cables is between)
&. UV detection probe, long life , high precision or electrochemical detection probe
&. Sample rack rotation speed: (adjustable)
. The time for one rotation of the same specimen is
. Ozonation air flow rate
. Clamp elongation%~
. Power supply voltage
Structural design introduction
The ozone aging test equipment is made of high-quality materials, and the surface of the shell is spray-painted to make it beautiful and smooth. The colors are coordinated and the lines are smooth. The inner tank is designed to be a closed space without direct light when working. It can place samples for aging tests. It can constantly control the test temperature difference in degrees Celsius. It is made of imported high-quality stainless steel plates. Indoor sample racks, clamps, conduits and other accessories are made of stainless steel, aluminum and other materials that are not easily decomposed by ozone and affect ozone concentration. The lifting height, frequency and amplitude of the dynamic sample rack can be adjusted. The sample holder can be rotated and the rotation speed is adjustable.
A transparent window is set at a reasonable position on the door of the chamber to observe changes in the indoor sample. The observation window is made of multi-layer hollow tempered glass, which has the advantages of transparency, heat insulation, and resistance to steam frosting.
The interlayer between the liner and outer shell of the equipment is filled with high-density fiberglass wool to ensure that the box will not cause excessive temperature fluctuations due to temperature conduction, so that the temperature of the sample remains constant during the test.
The equipment uses a long-axis fan motor for stirring, and a stainless steel multi-wing impeller that is resistant to high and low temperatures to achieve strong convection and vertical diffusion circulation, making the temperature in the laboratory uniform and stable.
Double-layer high-temperature-resistant high-tensile sealing strips are used between the door and the box to ensure the sealing of the test area. Reaction-free door handles make operation easier. Set one or more test holes at a reasonable position on the left side of the box, which can be used to connect external test power cords or signal lines. The arrangement of the hole diameter or number of holes must be instructed by the user.