We need to know the three major knowledge of the ozone aging test machine: the first point explains the test principle of the ozone aging test chamber; the second point focuses on the adjustment of the ozone concentration; the third point explains the environmental requirements of the test box. Let's take a look at the Shanghai Bao test together in detail:
1. Test principle of ozone aging test chamber
The vulcanized rubber or thermoplastic rubber sample was exposed to a static test chamber under static tensile strain conditions in a closed test chamber containing air and constant humidity at a constant ozone concentration, and the crack of the sample was examined for a predetermined period of time.
The evaluation of ozone cracking at selected ozone concentrations and test temperature conditions may be as follows:
a) After the specified test time, check the sample for cracks, and if necessary, evaluate the crack degree of the sample;
b) measuring the earliest cracking time of the sample under any specified tensile strain;
c) Determine the critical strain for any specified exposure time.
2. Adjustment of ozone concentration in ozone aging test chamber
When an ultraviolet lamp is used, the ozone concentration can be controlled by adjusting the voltage applied to the lamp, the gas flow rate, or the method of covering part of the lamp. When a silent discharge tube is used, the ozone concentration can be controlled by adjusting the voltage applied to the generator, the electrode size, the oxygen flow rate, or the air flow rate. These adjustment methods should keep the ozone concentration within the tolerance of the specified concentration. In addition, after opening the test chamber to place or inspect the sample, the ozone concentration should be restored to the concentration specified in the test within 30 minutes. The ozone in the test chamber must not exceed the concentration specified in the test under any circumstances.
3. Environmental requirements for ozone aging test chamber
The test chamber should be sealed and unlit, and the test temperature difference can be constantly controlled at ±2 °C. The inner wall of the test chamber, the conduit and the frame should be made of materials that are not easily decomposed by ozone (such as aluminum). The test chamber can be set to observe the surface change of the sample, and the light source can be installed to facilitate the inspection of the sample, but it should be kept dull during the test.
The above is a detailed discussion of the working principle of the ozone test chamber. Three points explain the external conditions of the test chamber and the internal factors. I hope that you can help you after reading this article.
Tower Crane cabin is the control center of the crane and is attached to the slewing unit. In order to get to the tower crane cab, the operator must climb a series of ladders within the mast.
The movement of the tower crane is controlled from the operator's cabin. Within the tower crane cabin, you'll find the operator's chair with joystick controller, electronic monitoring devices, and communication systems. Many cabins come with climate control to ensure a comfortable work environment. The Operator Cabin for Tower Crane is part of the slewing assembly.
A cabin for a tower crane is a small enclosed space located at the top of the tower crane Mast Section or tower crane jib. It is where the crane operator sits and controls the crane's movements and operations. The tower crane cabin is typically made of steel or aluminum and is designed to provide a safe and comfortable working environment for the operator. It is equipped with controls, instruments, and communication systems that allow the operator to maneuver the crane, lift and lower loads, and communicate with other personnel on the construction site. The cabin is often equipped with heating and air conditioning systems to ensure the operator's comfort in various weather conditions. Safety features such as guardrails, harness attachment points, and emergency controls are also included in the cabin design to protect the operator in case of accidents or emergencies.
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