Crops growing in heifer provides many advantages cottagers, saving him from a variety of troubles.Heat-loving plants are protected from the harmful effects of the environment, developing in optimal conditions.Structures and materials for modern greenhouses create the most comfortable humidity and temperature conditions for growth, but full provision of an enabling environment is impossible without ventilation.To solve this issue helps cylinders for greenhouse vents that run automatically and independently of man.The presence of such a device makes the operation of suburban construction convenient and efficient in terms of getting a decent cleaner crop.
principle of operation of the hydraulic cylinder
classic example of the greenhouse cylinder - a factory automatic system that provides ventilation inside the structure.Operation of this device is based on the movement of the piston, which is activated as a result of expansion of the liquid in the cylinder under the action of solar heat.In the process of lowering the temperature of the hydraulic cylinder for greenhouses closes the window, because the fluid takes the original state with less.Such devices are universal, but have to pay for them.
In addition, there are non-standard design of greenhouses, which require machines with special characteristics.For example, if you want to ensure the rise of massive panes in a greenhouse, you'll need a more powerful cylinder for greenhouses, which do better with their own hands.When designing such a device, and you can make a variety of additions.In particular glued foil increases the rate of heating device that accelerates the process of opening the window.On the other hand, if you turn to the sun-sensitive element of the reverse side (not foil), it would take more time to achieve the moment of activation of the system.
What do ram?
For this purpose, usually used pneumatic shock absorber from the car, which is mounted on the hood or the rear door.Special requirements for the technical condition of the mechanism is not shown - the main thing that it was the pressure.You can check this by running stock.Even the hydraulic cylinder for the greenhouse from the damper from the old car is able to work for several years, which is a good result, given the intensity of the operation.
At the end of the cylinder is necessary to cut the ball in a way that left as much as possible the length of the holder.The cylinder is then clamped with a vise, but this should be done through the ends to the work item itself is not damaged.The firmly fixed cylinder drill is done 3 mm hole.At the time of formation of holes in the stump by the pressure of the air comes out.Chance of a small "puff" or no risk of swarf into the eyes - in this case it is necessary initially to prepare goggles or face shield.After tapping into the stump cylinder greenhouse will be ready.Next thread is formed on the stump.As can be seen, all the operations carried out exclusively with the outer surfaces of the shock absorber, so there is no need to penetrate into its interior.
tank to ram
The hydraulic cylinder must be provided and the presence of fluid reservoir.This part is also recommended in the automotive parts.In this case - of the universal joint, which are cut so-called ears.Cutting must be done strictly according to the estimated length of the specific greenhouse, then butt weld.The other end of the two holes are made.First serve for the connection, and the second for easy venting.The most difficult step in which the cylinder is made of shock-absorber for the greenhouses with their own hands, it is threading.And it is important not the severity of this procedure, and the responsibility - to any violation of symmetry can make the item unsuitable for further use.The parameters for the calculation are as follows: length of 80 cm and a diameter - 7 cm. The aggregate amount of up to 3 liters.If you use a larger volume of the tank, it is desirable to fill the extra space with metal elements.
connecting hose and spring
as a connecting element of the system, you can use the car brake hose.Again, the special requirements for it is not shown - it is important that the threads converged.Depending on the characteristics of the hose is cut corresponding thread on the reservoir and the cylinder.Optimal parameters - the height of 1cm increments of about 1.25 cm. Home-made cylinders to ventilate the greenhouses of the shock absorbers to withstand a load of 100 kg.That will be enough not only to the maintenance window, but the entire structure of the greenhouse.The only problem is that the independent rod return to their original positions can not be - the system draws the air through the seals.Therefore, the spring necessary, especially if the transom is underweight.
spring should cope with the weight of at least 5 kg, was carried on the rod to the back pressure.Since the balance weight is regulated on the transom, a standard doorstop.With it is possible to service multiple sections with the parameters of 1x2 m. In order to simplify the design pane are combined into a single system, a job that will provide the hydraulic cylinder for the greenhouse with sufficient traction.Sami sash is desirable to design so that ventilation is performed with the upper part, since this side is going to the hot air.
Which fluid to use?
cylinder is suitable for any liquid, but the best option would be oil.Many people mistakenly believe that the ether or alcohol increases the efficiency of the mechanism, but in fact it is not.It is quite normal motor oil, including working out of the engine.A simple cylinder for the greenhouse, you can fill out with your hands, and wash-up.If the hand was not appropriate fluids and have to go to the store, it means the type of oil M8 fit and at a price and performance.
When all the elements ready to separate, you can start assembly.In the first place with the help of a medical syringe filled with fluid in the shock absorber.You can use a funnel, pouring oil to the brim.Then you need to get out air bubbles from the outside - it will happen within a few hours.Further, the hydraulic cylinder is connected to a greenhouse with a hose by twisting.The rod is pressed so that the oil came out of the hose and bleed.In terms of structural feasibility of the air should not be left in the device, however, is completely free of bubbles, it is better not to leave the system, otherwise there is the risk of rupture of the cylinder.Air will serve as a damper and contract as the extension rod.
The installation is no big deal, but the process is different.Much will depend on the number of parameters and vents, as well as the construction of the structure itself.If the hydraulic cylinder for the greenhouses with their hands was made strictly under the specific size of the window for ventilation, then no problem.The main thing - to find a reference point and from the opening frames of the hydraulic cylinder.The very same tank must have direct access to the sun, otherwise the mechanism will not operate.
For optimal adjustment of the device must be attributed to the place of operation, wait until the heating tank under the sun and let the excess oil.Thus adjusting cylinder for greenhouses for use in construction with the flaps of a certain mass.Pre-calculated load will not work, so setup is done already, in practice, upon the use.If the pressure is insufficient, the air is discharged again to add a liquid, and if it is missing above the norm, then, conversely, the oil is drained.