Water erosion reducing highly-sealed centrifugal sand pump and working method thereof

Abstract

The invention discloses a water erosion reducing highly-sealed centrifugal sand pump. The sand pump comprises a pump shell, a motor shaft, an outer magnetic rotor, an isolation sleeve, an inner magnetic rotor, a transmission shaft, an impeller, an end cover, a feeding port, a discharging port and a flow slowing mechanism; the feeding port is formed in the center of the end cover, and the discharging port is formed in the side edge of the end cover; and the flow slowing mechanism is arranged on the feeding port, and the flow slowing mechanism comprises a flow slowing shell, a flow slowing groove, a flow slowing stop block and a flow slowing spring, wherein the flow slowing shell is fixedly arranged on the feeding port, the flow slowing groove is formed in the flow slowing shell, the flow slowing spring is fixedly arranged in the flow slowing groove, and the flow slowing stop block is arranged at one end of the flow slowing spring. According to the sand pump, on one hand, a buffering structure is adopted for the inner wall of a device, so that the pressure of fluid on the device is reduced, the damage to the device is reduced, and the service life of the device is long; and on the other hand, the pressure near a feeding pipe is increased, so that the cavitation problem is solved, the working quality of the device is improved, the device is not prone to being damaged, and the service life is long.

Description

technical field [0001] The invention belongs to the field of material transfer equipment, in particular to a high-seal centrifugal sand pump for reducing water erosion and its working method. Background technique [0002] The centrifugal sand pump is mainly used to support the circulating solid control system of the oil field drilling rig, and its function is to provide drilling fluid with a certain displacement and pressure for the desander, desilter, mixer, etc., so as to ensure the efficient operation of these equipment . Since the emergence of centrifugal pumps in the 1930s and 1940s, they have been in continuous development and have been in a state of great demand in the market. Nowadays, there are more than 600 pump manufacturing enterprises in my country, with an annual output value of nearly 20 billion, which is still rising. It can be seen that the centrifugal sand pump is an indispensable equipment in modern industrial production. [0003] However, due to the hu...

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Problems solved by technology

[0005] 1. The current centrifugal sand pump is prone to wear and tear. Since the sand pump uses centrifugal force to work, the fluid has a large pressure on the inner wall of the equipment, which is prone to wear and cracks, causing damage and destruction of the equipment and affecting the service life of the equipment.

[0006] 2. The pressure near the feeding pipe of the current centrifugal sand pump is low, and cavitation is easy to occur. The cavitation will rupture during the pressurization process, which is easy to cause damage and damage to the equipment and affect the service life of the equipment.

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