Air tightness testing device of shielding centrifugal pump

Abstract

The invention discloses an air tightness testing device of a shielding centrifugal pump. The air tightness testing device comprises an inner container, a shell and a pump body, the inner container isfixed to the inner wall of the top of the shell, and a partition plate is fixed inside the inner container; the interior of the inner container is divided into a detection tank and an installation tank through the partition plate, an opening is formed in the position, corresponding to the detection tank, of the top of the shell, and a sealing cover is arranged at the top of the opening; one side of the sealing cover is movably connected with the shell through a hinge, and the other side of the sealing cover is clamped to the shell through a lock catch; a lifting device is fixed in the detection tank, the pump body is arranged at the output end of the lifting device, and an air inlet is formed in one end of the pump body; a temperature control device is arranged on the outer side of the inner container; the temperature control device comprises an installation shell, a heating tube, an air blowing device, the temperature sensor and a control panel, and the installation shell is located on the outer side of the inner container. The air tightness testing device for the shielding centrifugal pump can be used for constant-temperature detection of the air tightness of the pump body; the connection sealing performance of the pump body and a detection device is better, so that errors of the air tightness detection of the pump body are reduced.

Description

technical field [0001] The invention relates to the technical field of air tightness testing of shielded centrifugal pumps, in particular to an air tightness test device of shielded centrifugal pumps. Background technique [0002] Ordinary centrifugal pumps are driven by connecting the impeller shaft of the pump with the electric shaft through a coupling, so that the impeller and the motor rotate together to work, while the canned pump is a sealless pump, the pump and the drive motor are sealed in a sealed In the pressure vessel filled with the pumped medium, the pressure vessel has only static seals, and a set of wires provides a rotating magnetic field and drives the rotor. This structure cancels the rotary shaft sealing device of the traditional centrifugal pump, so it can be completely leak-free. [0003] After the canned pump is produced, it is necessary to test the airtightness of the pump body. The structure of the device for testing the airtightness of the canned pu...

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Problems solved by technology

[0003] After the canned pump is produced, it is necessary to test the airtightness of the pump body. The structure of the device for testing the airtightness of the canned pump in the prior art is relatively simple, and the connection with the pump body is relatively low, which makes the detection data error larger , especially in the environment where the temperature difference changes greatly, because the change of temperature will easily cause the change of gas volume, which is not conducive to the reasonable detection of the air tightness of the pump body

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