Vertical anti-freezing self-priming piston pump

Abstract

The invention discloses a vertical anti-freezing self-priming piston pump. The vertical anti-freezing self-priming piston pump comprises a bracket, and an outer bracket positioned at the upper part of the bracket and formed integrally with a synchromesh gear case through casting. A reduction gearbox bearing base, a reduction gearbox cover, a motor bracket and an explosion-proof motor are arranged at the upper part of the synchromesh gear case in sequence. The vertical anti-freezing self-priming piston pump is characterized in that an upper sealing plate is arranged at the upper end of a cavity while a lower sealing plate is arranged at the lower end of the cavity; synchronous pistons are arranged between the upper sealing plate and the lower sealing plate; the two synchronous pistons are engaged with each other and rotate and the outer diameters of the pistons are in interference fit with the cavity; convex edges of upper and lower end surfaces are respectively in interference fit with the upper sealing plate and the lower sealing plate; an upper machine dynamic sealing ring, an upper machine static sealing ring, a lower machine dynamic sealing ring and a lower machine static sealing ring for sealing an auxiliary transmission shaft and a synchronous shaft are arranged at the upper parts and the lower parts of the synchronous pistons; and an electric heating water circulating device is disposed in an explosion-proof box at the upper part of a rear separated chamber of the cavity. The vertical anti-freezing self-priming piston pump has the advantages of small size, compact structure, good sealing performance and strong self-priming capacity, and effectively solves problems in freezing prevention and thermal insulation of a pump body.

Description

technical field [0001] The invention relates to a piston pump, in particular to a vertical antifreeze self-priming piston pump. Background technique [0002] In the practice of oilfield production, it is necessary to pump, dump, lift, and discharge media such as dirty oil and sewage. In this process, self-priming pumps are generally used to complete the process. Currently, known self-priming pumps, such as Chinese invention patents, The patent number is: 201210450786. It discloses an explosion-proof vertical self-priming pump, including explosion-proof motor, motor base, bearing seat, box body, pump cover, guide vane, impeller, main shaft, guide bearing, temperature measuring component, explosion-proof liquid level switch; the explosion-proof motor is installed on the motor seat, the bearing seat is installed on the box, and the motor shaft is connected to the pump main shaft with a diaphragm coupling. The main shaft is installed with metal bearings, mechanical seals, impel...

AI Technical Summary

Problems solved by technology

When starting the pump for the second time, although the pump does not need to be primed, the residual medium is leaked and evaporated, and fluid replacement is still required to start the pump to absorb liquid

Regardless of whether it is a partial insulation interlayer or a full interlayer, the insulation is considered outside the contact with the medium, and the heat source needs to be provided from the outside. It is also necessary to set the mixing heat pipeline to connect with the pump body to achieve insulation. If the site does not have external Heat source medium, pump body insulation can not be achieved

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