In this paper, self-developed non-standard seals are used to provide elastic force by elastic deformation of O-rings, adjust the compression amount or hardness, and provide support surface as the fulcrum to make microscopic deformation of the sealing surface and close to the outer surface of the mandrel. The elasticity required for sealing performance. The inner hole of the sealing ring cooperates with the mandrel, and the outer hole is matched with the sleeve, and two rectangular slots are opened thereon for mounting the O-ring. The O-ring is made of virgin rubber with a Shore hardness of about 80. The support ring is made of PTFE, domestic and imported non-reinforced nylon. Under strong shear conditions, the negative pressure effect is not ideal. Finally, 30 glass fiber reinforced nylon is used. manufacture. It is also difficult for the elastic element to provide sufficient spring force in a limited space. Generally, it is only possible to seal an oil-like fluid having a relatively large molecular weight subjected to a positive pressure. For a small molecule fluid such as water or a negative pressure, the sealing effect is not good, and the gas is difficult to seal. The torque sensor measures the shear torque of the fluid at different shear rates. The drive controller controls the speed of the servo motor and measures the motor drive current and other parameters.
The rotating outer cylinder of the rheometer must be transparent. The outer cylinder is made of tempered glass or plexiglass, which can meet the visual functional requirements under the condition of bearing pressure (negative pressure or positive pressure). If tempered glass is used for high-speed grinding by a diamond wheel, the inner diameter of the outer cylinder can be rotated to obtain a high-precision size, shape and positional accuracy, but complicated shapes such as threaded holes at the upper and lower joints are difficult to form, and when pressed, There is a cracking problem. It is easy to cause condensate in the flue gas inside the pipeline. If the external temperature of the pipeline is lower than the dew point temperature of the flue gas, dew point corrosion will also occur.
Crowd Control Barrier introduction:
Heavy duty crowd control/pedestrian barriers (Portable Fence, Temporary Fence or Removable Fence
, Steel Barriers ,welded Wire mesh rolls), it plays the role of protection in house site, major public events, sports, concerts, festivals, gatherings, swimming pools and many other uses for secure construction sites and private property.
Inter-locking "hook and eye" systems for quick installation. Crowd control barriers are designed to be linked together via hooks. Each hook is made of a 5//8" steel rod. The feet are either flat or arched.
crowd control barrier surface treatment: hot dip galvanized or powder coated after welded
crowd control barrier size: 914mm*2440mm, 1090*2000mm, 1090*2010mm, 940*2500mm
crowd control barrier frame: O.D 20, 25, 32, 40, 42, 48
crowd control barrier infill picket: OD 12, 14, 16, 20
crowd control barrier feet: Flat feet, Bridge feet and Tube feet
Crowd Control Barrier
Steel Crowd Control Barrier,Metal Crowd Control Barrier,Heavy Duty Crowd Control Barrier,Road Barrier,Steel Barriers
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