Model test device and test method for sealing performance of check valve connection part

Abstract

The invention discloses a model test device for the sealing performance of joints of check valves. The model test device comprises a water feeding pressure device and a sealing barrel. A water feeding pressure pipe orifice is arranged on the upper portion of the sealing barrel, the water feeding pressure device is connected with the sealing barrel by a connecting pipe, an air bleed valve and a first pressure gauge are arranged on the upper portion of the sealing barrel, a vertical pipe is arranged in the sealing barrel, the upper end of the vertical pipe is sealed, an upper-layer external pressure plate and a lower-layer external pressure plate are arranged at the bottom of the sealing barrel, a geotechnical membrane is arranged between the upper-layer external pressure plate and the lower-layer external pressure plate, the lower end surface of the lower-layer external pressure plate is connected with a check valve, a groove is arranged on the upper end surface of the upper-layer external pressure plate, the lower end of the vertical pipe is inserted into the groove, and the vertical pipe is hermetically connected with the upper-layer external pressure plate by the groove. The model test device has the advantages that the model test device is simple in structure and convenient to assemble and shift, a large quantity of inspection work for the sealing performance of the check valves in a construction site can be completed, loss and wastage of water resources are prevented, and benefits brought by reservoir engineering are increased.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to a model test device and a test method for the sealing performance of a connection part of a check valve. Background technique [0002] In the reservoir engineering in the plain area, a large area of ​​geomembrane should be laid to prevent the water storage of the reservoir from flowing into the ground. Due to the laying of the geomembrane, a large amount of gas will be generated after the water is stored. , the gas is discharged from the bottom to the ground through the check valve. The sealing performance of the connection part of the check valve is very important. If the check valve is not well sealed, water will seep into the ground from the check valve, resulting in loss of water resources and reducing the benefits of the reservoir project. Therefore, it is necessary to check its airtightness. Since there is no reasonable and effective device and method...

AI Technical Summary

Problems solved by technology

The sealing performance of the connecting part of the check valve is very important. If the check valve is not well sealed, water will seep into the ground from the check valve, resulting in loss of water resources and reducing the benefits of the reservoir project. Therefore, it is necessary to check its airtightness

Because there is no reasonable and effective device and method for checking the airtightness of the connection part of the check valve in the prior art, the workload of the existing inspection technology is heavy, and it is difficult to carry out convenient operation on the construction site

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