Insect net at the end of sampling tube of breathing smoke fire detector

The precise placement of aspirating smoke detectors ensures that they adequately cover all potential fire areas, so that smoke can be detected very early in the fire. This not only reduces the risk of fire spreading, but also provides more time for evacuation and fire response. If the installation is improper, such asPPsampling tube position is not correct or sampling hole is not compliant,the end of the sampling tube is not insect-proof treatment, it may lead to detection dead angle, so that the fire can not be found in time at the critical period, increasing the safety hazard.

Selection of sampling tubes

With the development of the times, people's requirements for environmental protection are becoming more and more strict, and more and more attention is paid to the safety of public places. Therefore, in the sampling tubes of extremely early smoke warning systems in modern high-rise buildings, subways, hospitals, colleges and large shopping malls and other densely populated places,people require a sampling tube made of ordinaryPVC material that is safer, more reliable, and more environmentally friendly——, low-smoke, zero-halogen, flame retardant, environmentally friendly, fire and low temperature resistant sampling tube.

In order to meet the safety and environmental protection requirements in the sampling tube of aspirating smoke detector,weusesyntheticraw materials to manufacture low smoke, halogen free, flame retardant and low temperature resistant sampling tubes after a large amount of research data. Compared with ordinaryPVC sampling tube,PP low smokezero halogenlow temperature and high temperaturesampling tube is an environmental protection product that meets modern safety requirements.

In the event of a fire, the smoke released from the burning sampling tube is non-toxic and corrosive, thus greatly reducing the damage to human body and objects.

PPsampling tubecharacteristics

Toxic and corrosive

When ordinaryPVC sampling tubes burn, chlorine and hydrogen in them combine to release hydrogen chloride gas. PVC sampling tubes are prohibited when sampling tubes are required not to produce excessive smoke and toxic substances, or when elevated temperatures do not enhance their toxicity. Thelow-smokehalogen-free sampling tube uses halogen-free polyolefin as the base material, which does not produce acid gases during combustion, so its toxicity and corrosivity are much lower than ordinaryPVC sampling tubes.

V0 Flame retardant

BecausePVC and other halogen-containing materials made of sampling tubes although have a certain flame retardant properties, but because of its smoke and toxic and corrosive gases, in the modern society for safety and environmental protection requirements are getting higher and higher,low smokehalogen-free flame retardant sampling tubes become an inevitable choice.

In thelow smokehalogen free flame retardant, the main flame retardant is a large number of filled aluminum or magnesium hydroxide and other flame retardant fillers. This substance can release crystal water when the sampling tube is burned, absorb a large amount of heat, thereby slowing down the temperature rise of the polymer, delaying thermal decomposition and reducing the combustion rate. In addition, the water vapor generated by dehydration decomposition can dilute flammable gases, thus playing a flame retardant effect.

Of course, adding too much combustible material to organic matter will greatly reduce the mechanical properties of the material. Therefore, how to make halogen-free materials have both good flame retardant properties and good mechanical properties has once become a difficult problem to solve. After mass material screening and a large number of experimental data, ourR & D capabilities make it possible to comply withGB/T5169.16-2017,UL94,IEC 61386 standards.

fire resistance characteristics

PP low smoke halogen freefire resistant sampling tube cansafely operate for a certain time under 100℃ environment. WhenPVC sampling tube burns, it will release corrosive and ionic gases that destroy mica sealing edge, resulting in a guided environment.

Low smoke: when burning, only light mist, visible distance ofmore than 60 meters.

Non-toxic: Free of any toxic substances (lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyls, polybrominated diphenyl ethers, phthalates (DEHP, BBP, DBP, DIBP).

Flame retardant:V0 flame retardant

Long life:100 years

High temperature resistance:100℃

Low temperature resistance:-50℃

Environmental standards:comply with international (EU and Japan) environmental standards.

Sampling tube opening requirements

Accordingtothe Code for Design, Construction and Acceptance of Suction Smoke Detection and Alarm System, in order to avoid impurities remaining in the sampling pipe, the sampling hole shall be drilled first, and the debris around the sampling hole and in the pipeline shall be treated before adhesion with the installed pipe network.

During installation, the sampling tube should be fixed first, and then the sampling hole should be drilled. This sequence is based on considerations of cleanliness within the sampling tube. If the sampling hole is drilled first, the untreated hole may become a channel for dust and impurities, which will be very difficult to clean once they enter the sampling tube and may affect the sensing effect of the detector. Therefore, according to the standard process, the sampling pipe network should be laid out and fixed according to the design drawing first, so as to ensure that each area can be effectively monitored.

After fixing the sampling tube, great care must also be taken when drilling. Specialtools shall be used in the drilling process to ensure that the size, shape and position of sampling holes meet the design standards. Once drilling is complete, the area around the sampling hole and any debris that may have been generated in the pipe must be cleaned thoroughly. This step is critical because it prevents any debris or impurities from entering the installed pipe network and adversely affecting detector performance.

Sampling tube end pest control solution

"aspirated smoke detection alarm system design, construction and acceptance specifications" end cap hole requirements, standard sampling methods such as under the ceiling sampling, floor sampling, cabinet top sampling, etc., do not need to open the end of the hole, the aperture value of 3-6mm; Opening the end hole at the end can effectively adjust the transmission speed of air samples in the sampling pipe network, enhance the balance of air flow, the end of the sampling hole is generally 3-6mm, due to the larger aperture, in actual use there will be unknown insects (to prevent common pests, such as flies, mosquitoes, cockroaches, etc.) or debris into the sampling pipe, thus affecting the balance of air flow and the accuracy of equipment detection by interference.

In the face of these end insects/debris invasion, special insect net end cap, perfect solution to the end airflow balance and insect/debris invasion and other issues.

Insect terminal cap polyethylene as raw material, added anti-aging, anti-ultraviolet and other chemical additives, with tensile, heat, water, corrosion resistance, non-toxic and odorless characteristics.

In order to further ensure the reliability of the system, it is recommended not to rush to connect the pipe network with the detector after the construction of the sampling pipe network is completed. The installed sampling network should be purged with high pressure air to remove dust and other fine particles that may remain in the pipe during installation. This ensures that when the detector is connected to the sampling network, the interior is completely clean, thus ensuring the best working condition and accuracy of the detector.

The installation of aspirating smoke detectors is a process that cannot be neglected. It requires strict adherence to the correct procedures and methods to ensure that the detector performs as it should. From fixing sampling tubes to drilling sampling holes to high-pressure air purging, every link must be carefully constructed to provide a safe and reliable fire warning system to protect people's lives and property.