The mentally grueling stage finally passed. Looking at the floor tiles laid neatly, the house changed its chaotic and dirty appearance some time ago. The owners could not help but opened their mouths. Although it was a further step away from victory, this time it was very much necessary to get out of shape and relax the vigilance. Its solid wood stage is an important stage to test the home improvement company and test the owners. Some of the skill of handling details will emerge at this stage. How to judge whether the construction is scientific and reasonable, and how to do a good job of supervision, here's how to tell you a few points. Ceilings are almost one of the must-do projects in modern home decoration. However, the cracking of ceilings is a problem that many owners have to face after they have been renovated for several years. Yu Tangyin believes that this is because some construction workers have not scientifically dealt with the connection of suspended ceilings. So soon after the renovation, the wooden parts of the ceilings began to crack. So how do you do construction to avoid cracks in the ceiling? It is understood that the ordinary ceiling connection is like this: two wooden planks are nailed to the wooden keel, and a distance of about one centimeter is left between the panel and the panel to connect with AB glue. If the seam stays large, the unevenness between the board and the board is obvious. It does not look good. If the gap is small, the strength of the bonding is not enough, and the board is easily cracked. In fact, a more reasonable method is to cut the connection planes of the two plates obliquely, put them together in a "V" shape, and inject AB glue in the middle. This way, not only the seams are dense, but also the pulling force is large enough. Then, the seams are sealed with kraft paper so that even if the temperature and humidity change, the ceiling will not crack. â—†The balcony should not do too much ceiling Some families have large balconies, so they hope to be more sophisticated and make the balcony an independent space. However, insiders suggested that the balcony is less for ceilings. This is mainly due to the large temperature variation of the balcony, the wood is easily affected by the temperature for a while to shrink for a while to expand, long time the joint is easy to crack, it seems to affect the appearance. The cracking of the ceiling is originally a construction problem. Even the best construction must undergo the test of cracking. Therefore, if the ceiling of the balcony is to be decorated, nailing plaster lines will be appropriate. â—† Do a good job of moisture-proof engineering Wood is easily deformed by moisture, which almost everyone knows. However, how to do the moisture-proof process of woodwork, most owners have no heart. Yu Tangyin, the manager of a company's engineering department, believes that doing a good job of preventing moisture will have a very important significance in improving the service life and aesthetics of woodworking. Therefore, every owner should take this moisture barrier. First of all, wood products that come into contact with walls and floors should be protected against moisture. In particular, the back of the door and window cover, the back of the wall shape, the back of the foot line, the back of the cabinet on the bedside table of the wardrobe, and the wood products of the bathroom should be protected from moisture very cautiously. If you can, it's best to do more detailed moisture protection on the back of your wardrobe. In addition to applying a layer of moisture-proof paint on the wall, a layer of plastic foam film can also be glued on the back of the cabinet so that the moisture can be kept “outside the doorâ€. It should be noted that the moisture-proof coating should be coated as far as 1 cm beyond the outer edge of the wood product. Ceiling Mount Aisle Ceilings Living Room Ceiling Coating Bedsides Home Decorating Home Furnishing Windows Wardrobe Toilet Ceilings Bathroom Tiles Bathroom Doors
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â—† Ceiling connection must be handled with care
Motorcycle power devices are used in the internal combustion engine; people use diesel-fuel engine is known as the diesel engine, and the use of gasoline-fuel engine is known as gasoline engine. Because of the advantages of light weight, small volume, low noise, low vibration, easy starting and low cost, gasoline engine is widely used as its power device.
Two-stroke and four-stroke engine two-stroke engine for two-stroke engines and four-stroke engine: That is, the piston up and down reciprocating movement of two strokes to complete a work cycle of the engine. Four-stroke engine: where the engine crankshaft every rotation, that is, the piston up and down four-stroke reciprocating movement to complete a work cycle of the engine. Working cycle is the engine by the intake, compression, combustion expansion (work) , exhaust stroke composed of the work process. The process by which an engine completes one intake, compresses, works, and exhausts is called a work cycle, also known as a cycle.
Second, Cheng Chong and four-stroke engine work Principle A, two-stroke engine work principle the piston from the bottom stop to the top stop movement, it will complete the intake and compression process, the first stroke of reciprocating piston motion. The piston moves from the top dead center to the bottom dead center, it will complete the combustion expansion (work) and the exhaust working process, belongs to the piston reciprocating movement second stroke. When the piston moves from bottom to top and all vents and vents are closed, the exhaust and ventilation process is terminated and the fresh combustible mixture in the cylinder will begin to compress. At the same time, as the piston moves up, the capacity of the crankcase under the piston gradually increases, which causes the pressure in the crankcase to drop and forms a vacuum. When the vacuum of the crankcase reaches a certain degree, the reed valve automatically opens, the combustible mixture atomized by the carburetor is sucked into the crankcase. As the piston continues its upward motion, it will be near the TDC when an electric spark from the spark plug ignites the compressed combustible mixture. At this time the burning gas rapidly expand, so that the temperature and pressure of the combustion chamber rise sharply, forcing the piston down movement, piston that is through the connecting rod, crankshaft for useful work. When the piston moves from the top stop to the bottom stop, the pressure in the crankcase will increase with the decrease of the volume, and the reed valve will gradually close automatically. As the piston descends to the vent opening, exhaust gases are discharged into the atmosphere through the vent, the exhaust pipe, and the silencer. When the piston continues down to the vent opening, the precompressed fresh combustible mixture in the crankcase enters the cylinder through the vent and drives the exhaust gas in the cylinder to further discharge, this process is called scavenging. The engine then completes a working cycle. 4-stroke b, principle of four-stroke engine the first stroke -- intake stroke: When the piston is at a specified crank angle just before TDC, the intake valve opens and the combustible mixture is sucked into the cylinder. When the piston moves from the top dead center to the bottom dead center, the exhaust valve closes at a specified crankshaft angle at the top dead center, and the cylinder volume above the piston increases, make the cylinder to form a degree of vacuum mixture to continue through the intake valve intake intake. The intake valve closes when the piston reaches a specified crank angle after the BDC, at which point the intake process is completed. The second stroke-compression stroke: the piston from the bottom stop to the top stop movement, when the intake process is finished, the intake valve and the exhaust valve are closed, this time the cylinder's flammable mixture is compressed. On the compression stroke, when the piston moves up to a specified crank angle before the top dead center, a spark will be generated between the spark plug electrodes, which will be ignited by the compressed combustible mixture. The burning combustible mixture causes the temperature and pressure in the cylinder to rise rapidly, and the piston moves from the top dead center to the bottom dead center under the action of the high temperature and high pressure, and the connecting rod drives the crankshaft to rotate for useful work. The fourth stroke-exhaust stroke: in the combustion expansion stroke, when the piston to the lower stop before a specified crankshaft angle, exhaust valve open, exhaust gas through the exhaust valve began to discharge. The crankshaft continues to rotate and pushes the piston from the bottom to the top. Push the exhaust gas out of the cylinder. This exhaust process is terminated when the exhaust valve is closed at a specified crankshaft angle after the piston line has reached TDC.