Laying of pipelines
In past engineering practice, you will find that some anti-theft alarm projects have hidden dangers in the pipeline construction. The hidden dangers we are talking about here do not refer to fire hazards, but to hidden dangers of man-made destruction. At the installation site of certain detectors, we can often see the use of PVC pipe sleeves or exposed alarm detection cables. The pipeline installation height is not enough and can be reached by human hands, so these can be regarded as hidden damage to the system. Some people think that this is not important, considering that the host part of the entire system may be equipped with a tamper-proof function, and any damage system can be detected. However, this may greatly affect the working efficiency of the system, or even cause the system to be shut down for repair. At this time, the system maintenance engineer needs to devote more effort and brain power to carefully find this fault point. If it cannot be found in a short time, it will be impossible for some systems to arm the system users within the warning time, because the system will think that the failure has not been ruled out.
The use of PVC pipes or tanks for the protection of anti-theft system pipelines in certain current projects is, I think, obviously wrong. At the same time, for construction or investors, this is extremely unprofessional. Compared to galvanized steel pipes, PVC pipes are very vulnerable to man-made damage. Although it is inexpensive, it is extremely deficient in the hardness index of galvanized steel pipes. From some media, you can see many overseas engineering companies installing pictures of anti-theft alarm probes. When you look carefully at the pictures, you can see that the sheath pipe that extends from the detector is a metal hose, and the special card connector Connect the hose to the detector. The other end of the hose is connected to a fully sealed metal box. The other end of the box is connected to a galvanized steel pipe.
The hidden nature of the pipeline
In the actual installation process, especially for some new buildings. In the design and installation, the concealment of the detector pipeline installation shall be fully taken into account. When pre-embedding the protection pipe, it is still necessary to consider pre-embedding. This work can be completed by the civil construction unit when pouring concrete with the building structure, so as to ensure the concealment of the entire transmission path to the greatest extent. At the same time, it should also be considered that the pre-buried pipe can be easily and conveniently connected with the main bridge, so that a small diameter steel can be pre-placed in each jacket pipe so as to facilitate the use of the threader later. cable.
Two of the cores are used to connect the detector power supply, and the other two cores are connected to the alarm switch signal. Instead of using a six-core cable to connect the switch and the working power, the remaining two cores are used to connect the tamper signal. . If the system does not connect to the tamper switch of each detector at this time, for a thief who understands the burglar alarm system, he can easily open each time the system is in the disarming period (that is, the non-working period). The detector and its "hands and feet", it can be imagined that such a system safety factor is very low. Of course, the connection of the tamper switch cannot be said to have completed the construction of high-security protection. At this time, the cable connected to the tamper switch should be connected to the host's 24-hour uninterrupted zone terminal block. In this case, it can be guaranteed. The entire system front-end probe device is in a tamper alert time of 24 hours. Here we can think about how many anti-theft alarm projects will seriously implement this process. I think such a project will be rare.
Pre-determined installation location
Determining the installation location of the detector is also easily overlooked in the actual project. The selection process of the installation position of the anti-theft alarm detector is different from the installation position of the camera. If the handling is not good, the false alarm rate and the missed report rate will continuously increase, which will affect the efficiency of the entire system. When the engineering installer finds that the location is not ideal, there are many problems to be discovered when moving the detector installation location. First of all, the pipeline needs to be moved; if it is easier to reduce the distance of the pipeline, it is feared that in the event of an extension of the pipeline, it is necessary to face the problem of extension of the cable connection. In order to facilitate future maintenance, it must be designed at this location. A junction box, this junction box will also have a hidden danger. I think the emergence of this problem is that owners do not want to see, so early determination of the location of the detector is very critical, of course, in addition to the above issues there is a problem that we can not ignore, that is, easy to change the installation location also The building decoration will be damaged. For example, you need to move a ceiling-mounted detector installed on a decorative surface consisting of a whole piece of three-plywood to another location. This will be regarded as impossible work.
Conclusion
Anti-theft alarm system detector installation process is a complex process, due to its working principle determines the particularity of the installation, and often this is easily overlooked by everyone, and with the closed-circuit television monitoring system camera installation profit coefficient This is a far cry from technical and profit perspectives. Therefore, we can more clearly see that we must design and install a good anti-theft alarm system, we must do a good job of planning and design work.
Physical Properties: white powder Assay: ≥98% Melting range: 110-125℃ Ash: ≤0.1% Light Transmittance: 425nm≥95% 500nm≥97% Volatiles: ≤0.5% Applications: This product is that a kind of pluralism is obstructed the phenol type and resisted oxygen pharmaceutical, have very good compatibility with most of polymer. There is good function of preventing the color changing form light and heat. It is widely used in the high polymer material such as PE,PP,PS,polyamide, polyformaldehyde,ABS resin, PVC, synthetic rubber,etc. It is used for preventing the hot oxygen of the oil and coating from wearing out too.
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Chemical name:
Pentaerythritol-tetra-[β-(3,5-di-tert-butyl-4-hydroxyphenyl)-propionate]
Introduction: This product is a kind of odorless and tasteless white powder with steady nature. It is apt to dissolve it in such solvents as the benzene,acetone and ester, etc, do not dissolve in water, dissolve in the ethanol a little. It is fine that this product is pollution-free, heat resisting and is able to bear water taking out and of good compatibility. It can develop the cooperative effect and raise the antioxidant result when mixed with AT-168,DLTDP,etc.
Coating Material Additive
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