How to drain water in a greenhouse

Greenhouses are used to grow crops, whether they are vegetables, flowers or seedlings. In order to allow the crops in the greenhouse to grow better, many facilities need to be installed in the greenhouse, such as agricultural irrigation, drainage, etc. So how should drainage be done for greenhouses?

There are two common methods for determining the drainage slope of a greenhouse. One is to find the slope on the embedded parts, usually 4 meters apart with a height difference of 1 cm. This is a commonly used method for finding slopes in multi-span greenhouses. The second is to find a slope on the column, that is, when installing the main frame, all the embedded parts are flattened, and then the height of the column is cut or increased according to the drainage slope.

If the greenhouse does not have a drainage slope, there will be various disadvantages. I will share the various disadvantages with you, and everyone will know why the multi-span greenhouse needs a drainage slope.

1.If there is no drainage slope and all the columns are at the same elevation, in the event of heavy rain in the future, the drainage volume will be too large, and the water in the entire tank will most likely overflow from the tank, causing indoor rain leakage.

2.If there is no drainage slope, if there is light rain, the water volume will be too small and the drainage will not be smooth, and the water will accumulate in the sink. Even on a sunny day, it takes a long time for rainwater to evaporate. In this continuous cycle, the sink is very easy to rust. I have inserted a picture for your reference to show the consequences of poor drainage.

3. Some people suggested that instead of making a drainage slope, just add a few drainage pipes inside. In fact, this method is not impossible, but there are limits to adding internal drainage pipes. If there are too many internal drainage pipes, these internal drainage pipes are connected to the external environment, and the thermal insulation performance in winter will be affected. Especially in northern China, where freezing occurs in winter, adding internal drainage pipes is a great challenge to the insulation performance of the greenhouse.

4.The drainage slope of the building is also stipulated in the building, in order to better discharge rainwater from the top. If there is no drainage slope, rainwater will not drain smoothly, which will also have a certain impact on the load-bearing capacity of the building itself.

5.For Venlo-type multi-span greenhouses, if the drainage slope is not done properly, it will cause water dripping from the indoor dew collecting trough. Because the dew collecting tank is used to collect internal dew, once there is too much dew that cannot be discharged, it will overflow, causing dripping problems.

For greenhouses, if it generally does not exceed 40 meters, it can be made into single-end drainage. If it exceeds 40 meters, double-end drainage is required. If it is more than 80 meters or longer, you need to add drainage pipes inside to achieve good drainage effects.