Introduction: What is the installation method of the explosion-proof positive pressure cabinet? For all explosion-proof positive pressure cabinets, there is a set of rules for installation and construction that users need to follow. In order to avoid a little user's wrong operation method...............................
What is the installation method of the explosion-proof positive pressure cabinet? For all explosion-proof positive pressure cabinets, there is a set of rules for installation and construction that users need to follow. In order to avoid the erroneous operation methods of a few users, let Zhengzhou explosion-proof positive pressure cabinet manufacturers explain to us.
The box seals must be installed with the following construction. The seals must be solid and reliable, and the internal space of the wire ducts must be cut off. Sealing fibers should be used to fill the seals at certain locations to prevent them from flowing out. Dissolve the seal packing manufacturer's instructions and fill the seals from the fill port so that the effective thickness of the fill layer is greater than the inner tube of the wire tube by a minimum of 16 mm. This is because we believe that the thread toothing formed by the thick steel wire pipe thread generally does not have the firmness required for the connection of the metal pipe in the hazardous area and is filled with the sealing fiber smoothly so that there is no gap. Above the filling layer of the sealing filler, voids are easily generated due to the floating and evaporation of the remaining moisture, so when filling the sealing filler with the sealing member on the horizontal piping, the position of the injection inlet should be as high as possible, and the solution should be considered to reduce The mixing ratio.
For the construction and installation, the connection of the wire tube, the wire tube accessory and the electrical equipment in the connection of the metal pipe wiring should adopt parallel threads instead of thick steel wire pipe thread. Mechanical connection. In order to isolate the inner wall of the sealing member from the insulated wire and between the insulated wires as much as possible, the appropriate Luoque lubricants perform the thread processing of the wire tube with certainty. It is difficult to ensure that the effective screwing of the connection is more than 5 deduction when the pipe joint is inserted into the connection using a pipe joint, and the mechanical strength is reduced when the thread cutting part is exposed more. Therefore, it is preferable to use a joint pipe joint for connecting the wire pipe to each other. Due to corrosive gases, the use of parallel threaded dies for tubes, and filling of hermetic fillers for explosion-proof positive pressure cabinets, the seals should be tapped lightly, with the hermetic fillers penetrating into each part, and then allowed to stand until hardened, confirming After it has been hardened and the filling layer is free from defects, the plug of the filling port is firmly installed. In order to prevent the packing from flowing out of the packing and forming the filling layer, the most important thing is that moisture gas or water easily invades from the threaded part, which may corrode the piping thread or accelerate the insulation of the wiring and equipment, so it should be in the threaded part. After applying a non-cured etchant such as a liquid packing sheet, a screw connection is made.
In the construction site, explosion-proof positive pressure cabinets must be flameproof or increased safety type explosion-proof structure flexible pipe fittings where it is necessary to connect the explosion-proof flexible pipe. The inner radius of the curved part of the attachment must be equal to or more than 5 times the outer diameter of the fitting tube of the flexible tube.
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