Instrument installation method

With the development of industrial automation instrumentation has become more and more widely used in many industries are inseparable from the use of instruments. We often encounter the work of the control room, including dashboard production and installation, bracket production and installation, instrument panel installation, school wiring, internal power supply installation, on-disk instrument debugging, and installation. What is the specific instrument installation method? Let's learn about it together.

(I) Instrument panel installation The instrument panel is installed on the basis of channel steel. The channel steel generally adopts No. 10 channel steel prefabrication, which is installed and fixed by using expansion bolts or embedded anchor bolts. If the instrument is installed on a dashboard that is affected by vibration, it should be equipped with shock absorption measures, cushion mats or shock absorbers. Multi-disc assembly trays should be tightly connected and securely fastened. Installation bolts, nuts, washers, etc. must have a rust-proof layer. The instrument panel must be firmly and horizontally fixed, and its verticality allowable deviation, horizontal tilt allowable deviation, top horizontal maximum height difference, disc surface seam unevenness deviation, seam gap and other indicators should meet the specification requirements. The instrument panel should be reliably grounded, and the protective earthing can be connected to the protective grounding wire of low-voltage electrical equipment. The grounding resistance is generally 4W, and the maximum is not more than 10W. There are special requirements for grounding. There should be a self-control professional own grounding electrode, which must be grounded separately. Do not repeat grounding.

(II) Instrument Panel Wiring Instrument Panel Wiring means that after the outsourcing kit is installed, the wiring, wiring, and schematic diagrams of the instrument panel are checked, corrected, modified, and eliminated. This type of school bus is called a school bus. . After the instrument on the disk is installed and the external cable causes the disk to be connected to the terminal after the disk is connected, a full-line test must be performed once again to confirm it again, which is called the secondary calibration. The instrument panel wiring work includes this secondary school line. Dashboard wiring, in addition to the original wiring, but also need to add wiring or self-made discs also need to carry out additional wiring work, with 0.75 ~ 1mm2 single-core copper wire or other copper wire, using banding or clips Fix or run wiring harness wiring. Wiring has been included in the wiring process.

(C) Control Room Power control room power is the driving force of automatic control instruments. From the instrument's total power supply to each instrument panel, from the instrument panel to each power meter (including standby), there should be a separate power supply circuit and protection device, and can not be used across and used. The instrument power supply, distribution box and switchboard must have reliable grounding.

(d) The function of the instrument box and the instrument box of the self-controlled instrument. The incubator has a heat-insulating sandwich, which contains heat-insulating material, measures the freeze protection of the instrument in the box, or prevents the measurement of the crystallization of the measuring medium. The protection box is provided with an insulation layer, which is one of the protection measures that are prevented from being damaged due to various influences after the installation of the field instrument and affect the measurement.

The junction box (box), sometimes called a cable box, is the wiring of the field cable. The terminal strip is built in, which is the take over place of the field signal pipe or pneumatic instrument gas source pipe. Commonly used for branching over multi-core cable.

Distribution box refers to a special instrument power box, which is a power box that supplies power to the field instrument.

2, the installation of the instrument box. Insulation boxes and protection boxes are installed and fixed on the support. The box supports are made of angle steel or channel steel. When installing, the bracket (seat) is welded to the embedded steel plate or fixed on the pre-installed bolt. Box supports generally have a civil foundation and are embedded with steel plates or anchor bolts or expansion bolts on the civil engineering foundation. The height of the box from the ground is 1.3 to 1.5m, which can be installed separately or in a centralized manner.

There are two ways to install the junction box and distribution box. The same installation method as the incubator and the protection box can be adopted, and the suspension can also be mounted on the bracket of the wall.

Insulation box, protection box box on the hole is to use drilling methods, and use the bulkhead connector to connect the inside and outside of the box or cable, so that the box is sealed. In the explosion-proof building, the instrument box adopts positive pressure ventilation, and the introduction of the cable is sealed by the sealing stuffing box. Positive pressure vented instrument boxes need to be replaced prior to power transmission and a ventilation unit and alarm or control device must be installed.