A pulsed dry powder automatic fire extinguishing device adopts a pulse jet method. No matter how much weight is required, the fire extinguishing agent is all sprayed in only one second. Suspension pressure storage type fire extinguishing equipment adopts continuous injection method, fire extinguishing agent needs to discharge for more than ten seconds, and it takes even a few tens of seconds for heavy weight.
2. The feature of the pulse injection method is that all fire extinguishing agent is released within one second, and there is a certain momentum when releasing. The fire extinguishing agent spreads to both sides under the action of the impact force, sprays to the ground and then returns to the top, and is evenly distributed to every corner to achieve the best fire-extinguishing effect. Suspended storage pressure fire extinguishing equipment is an improved product of a portable fire extinguisher. The jet impulse has no large pulse. The fire extinguishing agent spreads to both sides when it is sprayed on the ground. There is no power to return, especially for the top fire. It takes a few seconds for portable fire extinguishers to inject directly into the combustibles. It is suspended to spray the extinguishing agent on the ground, and the fire on the combustibles can be destroyed by splashing. It is difficult to achieve the effect of fire extinguishing.
3. We know that the extinguishing agent extinguishes the fire on the premise that the extinguishing agent reaches the set extinguishing concentration. Because the pressure accumulator type fire extinguisher adopts the continuous injection method, it takes ten seconds or tens of seconds to release all the extinguishing agent. The continuous fire extinguishing agent has a long time to extinguish the fire, and the corresponding fire extinguishing time is long. The length of the fire extinguishing time determines the degree of fire damage. For the fire field, it will be damaged due to this seemingly short time.
Second: Different ways of starting fire fighting equipment
1, pulse dry powder automatic fire extinguishing device has two sets of system start function, one set is linked with the alarm system, electric start; the other set is through the self-integrated temperature sensing module automatically start. To achieve early fire extinguishing, the loss is small, and the probability of false start is zero.
2. Suspension pressure storage type fire extinguishing equipment adopts electric start-up mode when the system is linked, and the equipment itself does not have automatic linkage function. The automatic start is limited to a single device, because each suspension of the pressure storage type fire extinguishing equipment has a glass bubble activation element at the bottom, the device is based on the glass bubble temperature signal transmission, automatic start, linkage is to rely on the thermal cable to connect, using point gun The form of linkage starts. Practice has proved that the heat-sensitive wire will inevitably bury the risk of mis-startup for subsequent construction.
Third, different starting reliability 1, pulse dry powder automatic fire extinguishing device with temperature sensing module, temperature sensing element in the heat collecting area. The module is embedded in the fire extinguishing device. The automatic start function will not be damaged by the fire, and there is no problem of being unable to start. The starting reliability is high and the fire damage is small.
2. Suspended pressure-storage type fire extinguishing equipment uses heat-sensitive wires to string up the products, but it can only mimic the appearance of a linkage and cannot solve the fundamentals. It is well known that the temperature rises upward after a fire and forms a heat collection area at the top of a building, about 12 centimeters. Placing the temperature sensing element outside the heat collecting zone means that the time for starting the fire extinguishing device is prolonged. The farther the temperature sensing element is away from the heat collecting zone, the slower the starting of the fire extinguishing device is, and the greater the fire loss is. Suspended storage pressure fire extinguishing equipment places the temperature sensing element on the bottom of the fire extinguishing device, far beyond the heat collection area, and the fire extinguishing loss can be imagined.
3. Glass bulbs should be installed on the top of the building (such as office buildings, hotels, etc.) as temperature sensors. They cannot be mounted too low, and they cannot go beyond the heat collection area. Narrow cable tunnels, dense cable clutter, glass bubbles installed in the bottom of the device, do not say the temperature, slow start, easy to crush when replacement and maintenance, causing misfiring.
Fourth, different ways of maintaining management
1. The portable and cart type dry powder fire extinguishing equipment belongs to mobile fire extinguishing equipment. The maintenance period is one year. The maintenance items are to check the pressure and replace the fire extinguishing agent inside. Suspended pressure storage type fire extinguishing equipment belongs to the family of portable and push-type fire extinguishing equipment. In addition to the shape changed from long to round, the use mode is changed from mobile to fixed, the internal structure has not changed, the nature of pressure storage No change. Since the nature of things has not changed, the maintenance cycle and maintenance projects naturally cannot change.
2. Since there are hundreds of mobile fire extinguishing equipment manufacturers nationwide, and the maintenance site is dense, users will send mobile fire extinguishing equipment to the maintenance site to inflate and change the powder. The suspended storage pressure fire extinguishing equipment belongs to the fixed fire extinguishing equipment. There are few manufacturers and there is no site to speak of. The pulsed dry powder automatic fire extinguishing device is stored at normal pressure, there is neither leakage problem nor clogging, so it can be free of maintenance for five years, and the effective period of the product can reach more than ten years.
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