Upper water and wire outlet structure of built-in submerged motor pump

Abstract

The invention provides an upper water and wire outlet structure of a built-in submerged motor pump. In the structure, a wiring box is arranged on the upper part of a machine set to change the wiring model of a motor coil, a cable of the machine set is led out from the upper part of the wiring box, the water outlet pipe and upper cover of the machine set are made an integrated part, the lower part of the water outlet pipe is communicated with a cooling cavity between an outer sleeve of the machine set and a shell of a motor, the flange on the upper part of the water outlet pipe deflects toward the axis of the machine set, a round hole is formed in the center of the upper cover of the machine set, the inside diameter of the round hole and the outside diameter of the wiring box are in radial clearance fit, and an O-shaped sealing ring is used for sealing. The structure has the advantages that: the wiring model of the motor coil can be conveniently changed on a user site to make the built-in submerged motor pump adapts to a power supply voltage of 660 to 1,140 volts; and the radial size of the machine set is small, so the machine site can be arranged and used in a narrow mine conveniently.

Description

Technical field [0001] The invention is a structural method for water outlet and wire outlet of a built-in submersible electric pump, especially for use in coal mines, it is necessary to change the wiring mode of the motor coil to adapt to the power supply voltage conversion mine flameproof built-in submersible electric pump The structural mode of the water outlet and wire outlet of the pump belongs to the technical field of general mechanical product manufacturing. Background technique [0002] At present, in order to facilitate its manufacture, installation and use, most of the built-in submersible pumps are located above the unit, that is, on the upper cover of the unit jacket, such as figure 1 shown. figure 1 It is the accompanying drawing of the patent specification of 200420015632.7. Its main feature is that the outlet line and the water outlet are on the same cover and the axis line of the outlet line is not on the axis line of the unit. The coincidence process of t...

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Problems solved by technology

figure 2 It is the accompanying drawing of the 200620084577.6 patent specification. Its main defect is that it is difficult to install a junction box that can change the wiring mode of the motor coil. If the user's power supply voltage changes, it cannot be used.

At present, there are also junction boxes on the top of the unit, and the water outlet is on the side of the unit, such as image 3 As shown, this kind of built-in submersible electric pump is relatively easy to manufacture, and the wiring method of the motor coil can be easily changed to adapt to different power supply voltages, but the disadvantage is that the radial size of the unit is too large, and it is inconvenient to install and use in a narrow mine

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