If you take a green leather train and stick your head out of the window-of course, it's not allowed now-you will see rows of black and greasy wood under the tracks. They are called sleepers. These guys look humble, but they are the backbone of the railway. The weight of the train is on it, and it is soaked in the sun and rain. If there is no "hard work", it will rot into slag in three to five years.
So what on earth is "plotting against" these sleepers and making them retire early?
The number one killer is water.
This thing, wood, naturally loves to absorb water. You put it on the ground for a while, and when the rain comes, it sucks, when the dew comes, it sucks, and when the underground moisture comes back, it doesn't refuse. As soon as the water enters, the mold will have a hotbed, and the fungus will start to build infrastructure and slowly chew the wood fiber into powder. Have you seen the rotten rafter under the eaves of an old house in the countryside? That's the truth. Sleepers in the open air can experience the cycle of "bathing-insolating-bathing again" in one day, which will cause people to collapse early.
The second troublemaker is a worm.
Larvae of termites, wood bees and longicorn beetles. These guys treat sleepers as free apartments. They drill holes, settle down, have children, and eat a solid pine like a sponge. By the time the train runs over it, most of the sleepers may have been hollow inside, and they are all supported by a layer of skin outside. How long do you think this thing will last?
The third is fatigue.
The train is not an embroidered pillow. A heavy-duty freight train passes by, with an axle load of several tens of tons, and the sleepers are repeatedly crushed, vibrated and twisted. Even if you use fine pine, you can't bear the "beating" day after day and year after year. Just like you bend a wire repeatedly, it will always break. Although the fatigue of wood comes slowly, it will not be absent.
At this time, we have to invite our protagonist today-oil-immersed anticorrosive sleepers.
How was this thing made? To put it bluntly, it's not complicated: put the selected pine wood-the advantage of pine wood is its uniform texture and good oil absorption-into a huge closed tank, vacuum it first, and "vent" the air and water vapor in the wood cell cavity. Then, when it is "thirsty", put the anticorrosive oil pressure heated to a certain temperature into it, and let the oil drill hard into the wood and into every fiber cell.
The most powerful thing about this technology is that it solves the above three problems.
Let's talk about waterproofing first. Oil and water are incompatible. When the antiseptic oil penetrates into the wood fiber and takes up all the space that should have been reserved for water, there is no place for water to stay. Without water, what can fungi reproduce with? Oil-soaked sleepers are such a truth-they are "oily skin" from the inside out, water can't stay at all, and bacteria can't live.
Let's talk about pest control. Termites or moths, if they want to settle down in wood, there must be a premise: this wood is the "food" they are used to eating. However, the sleepers soaked in oil are full of antiseptic ingredients, and the insects will frown when they bite-this thing is poisonous and won't be eaten. What's more, the depth of oil immersion can often reach more than 13 mm, which means that a dense protective layer is formed on the surface, and insects can't even get in the door, let alone hold a party in it.
Finally, anti-fatigue. This is not the direct credit of oil immersion, but the toughness of pine itself and the lubricating effect of oil. After oil immersion, the fibers of the sleeper are filled with oil, which is equivalent to putting "lubricating oil" on each fiber. When subjected to repeated vibration, the fibers are not easy to dry-grind and break, and their toughness and durability are much higher than those of plain wood.
After all, the fate of a sleeper is decided from the moment it enters the jar. Those untreated vegetarian trees were "young men" when they were buried, and they became "old bones" in three to five years; Oil-soaked sleepers, however, have been "impervious to all poisons" since they were buried, and they have been lying on the railway line for a decade or two, ignoring wind, rain, insects and bacteria.
Why do you ask it? With that "armor" soaked in more than 13 mm. When the train runs over it, it may mutter in its heart, "That's it? I'm not afraid to press for another 20 years. "
This is probably the bottom spirit of oil-immersed sleepers.
