Hunan day Metropolis Daily on June 7 dispatch (reporter Chen Xi) is the floor able to bear or endure not how is wear-resisting measured? Can set up an electric circuit maintain commonly after fireproof electrical wiring receives ammunition how long? Is solar energy water heater unqualified what is the project basically?
Now, the reporter walks into Hubei to save qualitative check courtyard, explore these things are how to undertake check-up, achieve what kind of index to just consider check-up eligible.
Compound floor is turned to be ground 6000 times by sand paper
Walk into compound floor to detect room, there is temperature humidity monitor on the wall, "Temperature 23.8 ℃ , humidity 57.5% , detect should be in the environment with constant temperature wet constant. " Du Ming of senior engineer of place of this courtyard building materials introduces, detect here the wear-resisting of the floor is spent, intensity and coefficient of expansion.
Wear-resisting spends examine, set the floor go up in rotary table, the friction that the edge accepts sand paper 6000 times turns by the side of, every 500 turn should trade sand paper. "Family expenses the compound floor of one class, be ground at least 6000 times above, skin did not defeat ability to calculate qualification, family expenses the need of compound floor is in 2 class 4000 times above, and real wood floor needs to be ground 100 times only, its paint film is not broken namely eligible. " Du Ming explains.
The edge turns to be ground by sand paper by the side of the floor
Fireproof electrical wiring burns 1 hour still electrify
Fireproof electrical wiring already became family or unit decorate first selection. It is especially in urgent operation, fireproof electrical wiring can yield operation success. What kind of electrical wiring ability considers fireproof?
In Electromechanical place lab, have a heater, measure fireproof sex, anti-flammability, rate of spread of flame and smoke thickness.
"Place electrical wiring in burner combustion still maintains set up an electric circuit 1 hour, after involving fire, can continue electrify 45 minutes, the wire that maintains set up an electric circuit 105 minutes in all, just consider fireproof sex eligible. " Yao Yuan of Electromechanical place undersecretary introduces.
After electrical wiring be on fire, can have smother, if be low smoke electrical wiring, reduce pair of human body effects. How be measured?
Yao Yuan says: "Put its in the combustion in the furnace of 9 square metre, make a bundle of light next, see light transmittance how. See light transmittance how..
The electrical wiring that measures intensity already by taut
In addition, the intensity of electrical wiring also matters to person safety. For instance, cross river high tension line, should bear not only self-prossessed, fight wind-force even, if intensity is no good, can be out of shape prolapse ruptures directly even. "Be out of shape safe height is insufficient after prolapse, can cause hazard getting an electric shock. " Yao Yuan explained further be out of shape brought harm.
How is electrical wiring intensity measured? It is simple and crude pull electrical wiring, see the strength that draws have how old, the electrical wiring of size of different cross section, its intensity is different. Yesterday, staff member spot demonstrated to measure sectional the experiment that is intensity of electrical wiring of 70 square millimeter, will after electrical wiring is taut, the cap of eject is prevented on the lid, 1 minute, this electrical wiring is pulled.
Long-term need not solar energy water heater needs cover
Solar energy of courtyard of province qualitative check detects the institute is national level, often assume national selective examination detect the task. This inspector Wen Shurong introduces, from old national selective examination in light of, the percent of pass of solar energy water heater is in 80-90% .
Is unqualified project basically in what respect?
"Hot property, can capacity of effect value, cistern fraction defective of these 3 index is most. " Wen Shurong says, for instance can effect value is its energy-saving capacity, some exaggerated energy-saving grade, cistern capacity also is such, actual size is done not have nominal so big. When proposal consumer buys solar energy water heater, buy a brand, percent of pass is met relatively a few taller.
The cap on the lid, prevent electrical wiring to pull bring up the rear to shoot a person
Using on, wen Shurong suggests solar energy water heater does not want at noon to sail upstream, have the risk that scamper runs otherwise; Go out for a long time, solar energy is being basked in for nothing namely, the proposal takes the article such as cloth its cover, avoid to insolate.
