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A tent is a shelter consisting of sheets of fabric or other material draped over, attached to a frame of poles or attached to a supporting rope. While smaller tents may be free-standing or attached to the ground, large tents are usually anchored using guy ropes tied to stakes or tent pegs. First used as portable homes by nomads, tents are now more often used for recreational camping and as temporary shelters. A form of tent called a teepee or tipi, noted for its cone shape and peak smoke-hole, was also used by Native American tribes and Aboriginal Canadians of the Plains Indians since ancient times, variously estimated from 10,000 years BC to 4,000 BC. Tents range in size from "bivouac" structures, just big enough for one person to sleep in, up to huge circus tents capable of seating thousands of people. Tents for recreational camping fall into two categories. Tents intended to be carried by backpackers are the smallest and lightest type. Small tents may be sufficiently light that they can be carried for long distances on a touring bicycle, a boat, or when backpacking. The second type are larger, heavier tents which are usually carried in a car or other vehicle. Depending on tent size and the experience of the person or people involved, such tents can usually be assembled (pitched) in between 5 and 25 minutes; disassembly (striking) takes a similar length of time. Some very specialised tents have spring-loaded poles and can be pitched in seconds, but take somewhat longer to strike (take down and pack). Over the past decade, tents have also been increasingly linked with the homelessness crisis in the U.S., Canada, and other countries and places experiencing issues with homelessness. Places of multiple homeless people living in tents closely pitched or plotted near each other are often referred to as tent cities.
Camp tents refer to tents that can be camped outdoors. They are slightly more advanced tents than entry-level tents. Usually, the functions include rainproof, sunscreen, windproof, breathable and temperature insulation. When choosing, you should pay attention to the camping weather and activity environment to choose the style and fabric material of the tent, the size of the interior space, etc. The tent is designed with different uses in mind, and there are different styles. As far as the shape of the tent is concerned, there are generally five styles of common tents. Triangular tent: The front and back are made of herringbone iron pipes, and the middle frame is connected by a cross bar to support the inner tent and install the outer tent. This is the most common tent style in the early days. Dome-shaped tent (also known as yurt type): It adopts double-pole cross-support, and it is relatively easy to disassemble and assemble. It is the most popular style on the market. Hexagonal tent: It adopts three-pole or four-pole cross-support, and some adopts six-pole design, which pays attention to the stability of the tent and is a common style of "alpine" tent. Bottom-shaped tent: After being propped up, it looks like a boat that is buckled upside down. It can be divided into two-pole and three-pole different support methods. Generally, the middle is the bedroom and the two ends are the hall shed, and the design pays attention to the windproof streamline. This is also one of the common tent styles. Ridge-shaped tent: The shape is like an independent small tile house, the support is usually four corners and four columns, and a ridge-shaped structural roof is placed on it. This kind of tent is generally tall and heavy, and is suitable for motorists as an outdoor camping tent. Therefore, it is called a car tent.
A hammock tent is a camping product that combines the characteristics of a hammock and a tent. It is actually a hammock that can be hung, but it has more tops than a hammock. Hammock tents need to be built between triangular trees to prevent the danger of falling, and it is also difficult to climb into the hammock tent. Hammock tents, that is, the combination of "hammock + tent", this combination is specially designed for camping enthusiasts who are tired of sleeping in traditional tents. Sleeping in such a hanging tent, which can integrate with nature without really "getting in touch" with the rough ground, is simply the best choice for wild camping. This technology has been used as early as during World War II, when US troops were equipped with jungle camouflage hammock tents when marching. The hammock tents of the early 2000s were much more luxurious than that, more like the sleeping pods that the Na'vi people used to sleep in in the movie "Avatar."
The awning is a commercial product. The system uses the motor to drive the aluminum alloy coil to rotate, so that the fabric wound on the coil can rise and fall. At the same time, the fabric is tightened by the spring force in the arm support rod. The maximum opening angle of the system is 0~130 degrees, which can be operated by various control methods such as switch, remote control, and wind control. The awning has a comprehensive external shading function, which can completely block ultraviolet radiation, reduce indoor temperature, and reduce air conditioning load; it has energy-saving effect, which is of great significance from the perspective of energy saving and environmental protection; The strong sunlight is reflected into the interior in the form of diffused light, so that the interior light is bright and not dazzling, and it does not affect the landscape outside the window seen from the interior, extending people's living space from indoors to outdoors, creating a new living space; the special anti-ultraviolet function of 4×4 awning not only protects human skin from ultraviolet rays, but also greatly prolongs the service life of interior decoration and furniture. The sunshade has a variety of cloth patterns and colors. Users can choose according to their needs.
A winch is a mechanical device that is used to pull in (wind up) or let out (wind out) or otherwise adjust the tension of a rope or wire rope (also called "cable" or "wire cable"). In its simplest form, it consists of a spool (or drum) attached to a hand crank. Traditionally, winches on ships accumulated wire or rope on the drum; those that do not accumulate, and instead pass on the wire/rope (see yacht photo above), are called capstans. Despite this, sailboat capstans are most often referred to as winches. Winches are the basis of such machines as tow trucks, steam shovels and elevators. More complex designs have gear assemblies and can be powered by electric, hydraulic, pneumatic or internal combustion drives. It might include a solenoid brake and/or a mechanical brake or ratchet and pawl which prevents it unwinding unless the pawl is retracted. The rope may be stored on the winch. When trimming a line on a sailboat , the crew member turns the winch handle with one hand, while tailing (pulling on the loose tail end) with the other to maintain tension on the turns. Some winches have a "stripper" or cleat to maintain tension. These are known as " self-tailing" winc hes.
According to the different motive power of the winch, there are mainly the following six types: Electric winches are the most common winches. Relying on the vehicle's own power system to drive the winch, advantages: it can be basically used normally when the vehicle is on fire, which is unmatched by other winches, especially for areas with a lot of water, it is easy to install and can be installed in multiple locations and quickly. shift. Disadvantages: It cannot be used for a long time (the vehicle's own power system is limited, it is easy to heat itself, etc.), most of the electric winches can provide a small driving force, and can only apply force in one direction (installed in front of the vehicle can only be used to Pull forward, installed in the rear can only be pulled back). PTO winch uses the output power of the transfer case as the power source, it can continuously provide a large pulling force, a single use time is long (there is no heat problem), and it can provide multi-directional pulling force (front, rear, even left and right), it is military use The best choice for vehicles or serious high-performance off-road. The hydraulic winch uses the power of the vehicle and the power steering system as its power source, and uses the power steering pump to provide the source power. It is easy to install. Because its external fixed part is basically universal, it can even be interchanged in the field. The driving force is between the electric and PTO winches, and the chance of high temperature is extremely rare. Wheel winch is a relatively new winch system, that is, the driving force is provided by the wheel shaft. The principle is to use 4 of the 6 fixing screws on most off-road wheels to secure the winch. It is extremely easy to install/remove (and changing tires is a step), extremely lightweight (lighter than any other winch without the fatal extra weight of the front suspension), inexpensive, and provides both front and rear pull. Hand winch is a winch driven by the longitudinal or circular motion of the human hand. Due to the limitation of manpower work, the manual winch usually has a small pulling force. The pneumatic winch has the same design and working principle as the hydraulic winch, but the power is changed from compressed liquid to compressed gas. |
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14.11.2022 |
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14.11.2022 |
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