Elevator fire door industry

1. Introduction

In the design of the building, how to effectively curb the serious fire and its impact is more complex fire technology challenges. When a fire occurs in a high-rise building, it is not only necessary to consider how to limit the fire to a small space and area, but also to consider how to prevent the spread of fire and affect other floors.

In the case of fire, the elevator shaft becomes a natural chimney, and the fire damage to a certain extent is due to the chimney effect". In the event of a fire, these parts have become a pull out of the chimney, accelerate the spread of the fire, and the spread of many ways, fast. If the maximum inhibition of the elevator hoistway "chimney effect", can prevent or delay the fireworks along the elevator well spread and spread, at the same time as the trapped escape and fire rescue valuable time."

Elevator fire insulation doors have such effect. Generally speaking, is the elevator plus a thermal insulation door". If such a fireproof heat insulation layer door is installed on the elevator hall of high-rise building, will be very beneficial to the fire retarding fire through the well spread, so as to maximize the trapped and fire, heat and smoke isolation, to escape in time, save the trapped life. Therefore, the fire door for the protection of life safety, to prevent the spread of fire is of great significance.

Figure 1 elevator level fire protection is an important issue of fire safety

2. Requirements for elevator fire insulation doors and domestic and international standards

Fire is the process by which a combustible substance reacts with oxygen in the presence of oxygen to produce a flame, heat, and smoke. All three of them need to be on fire. In countries around the world, building components such as fire protection, such as door testing, need to reflect and meet these requirements, and the testing principles and requirements are also close to the. First of all, the product to be tested is clamped in a special furnace, which is then exposed to a controlled fire in a predetermined time. Then the results were evaluated by standard. Insulation performance and integrity.

In European countries, the performance test of the elevator door fire door is mainly based on DIN 1363-1 and DIN EN 1364-1 covering the non bearing building components of the fire test. The test is consistent with the current European centralized management in January 2004 published by the EN 81-58:2003 standard.
In the United States and Canada, the standard for E2226, after passing through the fire, may also be required to do a designated standard fire hose flow test. This is an additional test for simulating the integrity of test specimens under actual fire conditions.

China's Ministry of public security and the Ministry of housing launched the building design fire code GB50016-2014, the implementation date is May 1, 2015. The 6.2.9 clearly put forward the "fireresistance lift level should not be less than 1.00h, and should comply with the integrity and insulation of current national standard" lift test complete level of fire resistance, heat insulation and heat flux determination method "in accordance with the requirements of GB/T 27903". The technical standards belong to the B category, fire inspection, if not met, will be sentenced to substandard. The promulgation and implementation of this standard provides the basis for the design and production of the elevator door, which will play an important role in improving the quality of the elevator door and protecting the life safety of the firefighters and the persons in distress.

The elevator door of the fire-resistant performance of the standard, according to the refractory time divided into 30min, 60min, 90min, 120min four grades, grade fire-resistant performance of the single index of classification in Table 1, fire resistance rating by mixed indicators classification is shown in table 2. The significance of the fire resistance rating is as follows:
-Ett: according to meet the requirements of the integrity of the classification, refractory time is TT min;
-I TT: according to meet the requirements of thermal insulation rating, refractory time is TT min;
-W TT: according to meet the requirements of heat flux index classification, refractory time is TT min;
-EI TT: at the same time to meet the integrity of the index and the requirements of thermal insulation rating, refractory time is TT min;
-EW TT: at the same time to meet the integrity index and heat flux index requirements for classification, refractory time is TT min;

Table 1 Single fire resistance rating of elevator door

Specific fire resistance can be judged in accordance with the relevant standards.

3. The advantages of application of nano porous insulation board in elevator door system

Shanghai industry to develop new energy Mstar Technology Ltd HT-1000，MT-800 Insulation board is an ideal material for passive fire protection of elevator door. It has the following advantages, which can fully meet the relevant national standards:

- it does not burn, do not contain any combustible ingredients, in the process also does not break out of any harmful substances on the human body or the environment

  of fire, thermal insulation materials is green environmental protection and safety.

- it has good thermal insulation, due to its special structure and nano additives, can effectively reduce the convection, conduction and radiation heat transfer in various

  forms to the lowest level. With the increase of temperature, the thermal conductivity can be kept even lower than that of static air. Other traditional insulation materials,

  such as silicate ceramic fiber, calcium silicate, with the increase of temperature, the thermal conductivity increases rapidly, the heat insulation effect is not ideal or even

  can not work. (Figure 2)

Figure 2 thermal conductivity of different insulation materials at different temperatures

-It is 1/4-1/6 - thin, the thickness of the traditional thermal insulation materials, thermal insulation can play the same effect. According to the calculation, when the

thickness of the insulation board is 25mm, the temperature of the back surface is 128 DEG C and the heat flux is 1643W/m2, which is lower than the national standard

of 140 DEG C, and the heat flux <15000W/m2 is required at the temperature of 1160 DEG C. In this way, the thickness of the fire insulation elevator door is at the same

level as the thickness of the common elevator door, which provides great convenience for designers. But if you want to reach the ceramic fiber surface temperature of

140 degrees, the thickness of insulating materials (layer thickness of the gate) to reach more than 100mm.

- it has good integrity. The heat insulation board has a certain strength, and is wrapped in the non combustible glass fiber cloth, so as to ensure the cleanness of the

product and ensure no dust. The material in the normal lift operation, will maintain integrity. Once the fire occurs, the elevator door is attacked by fire when the exposure

temperature is high, the glass fiber coated fabric begins to shrink, shrink or even melt, but the main components of the core material itself integrity and thermal

insulation will not change.

Index of thermal insulation board industry company performance - give up to the foreign product performance and related standards, at the same time, based on the

domestic equipment, raw materials and reasonable market positioning, excellent performance, excellent material for the popularization and application to develop a good

opportunity.