Fabrication process of rigid waterproofing sleeves
In order to construct the composite mortar in the inner cavity of the rigid waterproofing casing, a single prefabricated component should first be selected from the manufacturer. After the pipe construction is completed and electrically welded, the earth backfill deformation is stabilized and should be addressed at the inner cavity of the interface. Before construction of the inner cavity cement mortar project, it is necessary to check that its longitudinal deformation does not exceed the value required by the design scheme, but care must be taken that it does not exceed 2% of the pipe diameter. Before constructing a rigid waterproofing casing project, the pipe must be cleaned to remove loose oxidation skin from the rigid waterproofing casing, including dirt, soil, high quality and environment. The rigid waterproofing casing should not exceed one-third of the thickness of the cement mortar.
The advantages of rigid waterproof casing have been widely used in the selection of the masses. The product plays a vital role in the moisture-proof characteristics of the pipe. When choosing this product, customers should take into full consideration the scale of the manufacturer's operation and the characteristics of the commodity in order to achieve the desired practical effect in the case of application. The commodity is available in many specifications and models, and customers can choose and follow the construction regulations of the project.
As can be seen from the Internet sales market service platform, the sales market for rigid waterproof casing is very complicated at this stage. Customers must make a reasonable distinction when choosing to buy so that they can choose the ideal flexible waterproof casing product. Under the condition of choosing goods, customers with more working experience can choose the ideal flexible waterproof casing products that can make a reasonable resolution. Within 200mm on both sides of the circumferential weld, a production shop topcoat that is less likely to adversely affect the quality of the weld should be sprayed to prevent corrosion of the weld. After ring welding, secondary antirust treatment should be applied to the welded area and the thickness should be ensured by brushing with manual maintenance.
When the air humidity in the gas exceeds 85%, the surrounding air temperature of the thick steel plate is lower than 3℃ or higher than 60℃ and the working temperature is lower than 10℃, the painting cannot be carried out. Usually, each sewer well is equipped with only one inlet, and the design scheme gives a clear amount of inlet and outlet water as well as water flow. The water flow in the design scheme of the sewer well inlet is not suitable for large water flows. Too much water flow would result in relatively high hydraulic gradients, which would make the placement of steps difficult. In the preliminary design scheme, the water flow is recommended to be 0.5-1.0 M / s with a small diameter and a large diameter. The height to width ratio of the inlet should be within the height to width ratio of the water level in the sewer well, usually one third of the reasonable water depth. This aspect ratio keeps the specification in a constant swallowing condition.
Rigid waterproof casing outlet: In some waterworks, the secondary fire pump room immediately absorbs the water in the sewage well, so the outlet of the sewage well is the secondary fire pump room's moisture absorption pipe. If a separate suction well is provided, the sewer well is usually connected to the outlet. The diameter of the outlet usually exceeds the diameter of the inlet. Rigid waterproof casing overflow pipe: When the tank is full and the inflow and outflow exceed the outflow, it is not necessary to discharge the total flow from the overflow pipe. To ensure smooth overflow, the diameter of the overflow pipe should be appropriate, usually the same as the diameter of the water inlet. Rigid waterproof casing drainage pipe: In order to drain the sewage from the sewer well and discharge the residual water at the bottom, a special sewer pipe is required. Usually, there is no special drainage pipe for large, medium and small sump wells, but a backup submersible sewage pump is installed. When needed, temporary placement can be made to improve the metabolism of the sewer well. Fixed dedicated drainage pipes should only be installed if the drainage equipment is simple and the pipe diameter is not large.
