Anti-corrosion screw vacuum pump

Abstract

The invention discloses an anti-corrosion screw vacuum pump, and relates to the technical field of vacuum pumps. The anti-corrosion screw vacuum pump comprises a screw vacuum pump body, the screw vacuum pump body comprises a body pipe, the body pipe is in the shape of a hollow elliptic cylinder with two wide ends and a narrow middle, a low-temperature water-cooling spacer bush is fixedly connected to the front side of the rear end of the body pipe, and the low-temperature water-cooling spacer bush is connected to the rear half portion of the body pipe in a covering mode. A main body device is arranged behind the main body pipe and comprises a main body plate, the main body plate is in threaded connection with a threaded rod connected to the rear side of the main body pipe, a collecting pipe device is arranged in the main body plate and comprises two collecting pipes, and the two collecting pipes are both embedded and fixedly connected into the main body plate; the two ends of the collecting pipe extend out of the main body plate, the collecting pipe is of a tubular structure with the large inner diameter of the front end and the small inner diameter of the rear end, and collecting grooves are evenly formed in the inner side wall of the collecting pipe at equal intervals.

Description

technical field [0001] The invention relates to the technical field of vacuum pumps, in particular to an anti-corrosion screw vacuum pump. Background technique [0002] A vacuum pump refers to a device or device that uses mechanical, physical, chemical or physicochemical methods to evacuate the evacuated container to obtain a vacuum. Generally speaking, a vacuum pump is a device that uses various methods to improve, generate and maintain vacuum in a certain closed space. According to the working principle of the vacuum pump, the vacuum pump can basically be divided into two types, namely, gas capture pump and gas transmission pump. . It is widely used in metallurgy, chemical industry, food, electronic coating and other industries. Commonly used vacuum pumps include dry screw vacuum pumps, water ring pumps, reciprocating pumps, slide valve pumps, rotary vane pumps, Roots pumps and diffusion pumps. It is an indispensable main pump type in the application of vacuum technology...

AI Technical Summary

Problems solved by technology

[0003] The publication number is CN112081745A, which discloses an anti-corrosion screw vacuum pump. The vacuum pump includes a motor, a transmission structure is provided on the right side of the motor, a coupling is provided on the right side of the transmission structure, and a transmission shaft is provided on the right side of the coupling. Two sets of universal joints are arranged at the right end of the transmission shaft, a connecting shaft is arranged between the two universal joints, a threaded rod is arranged on the right side of the connecting shaft, the threaded rod includes a screw, and an anti-corrosion layer is set on the screw. The anti-corrosion layer surrounds the threaded rod, the anti-corrosion layer includes a sticky layer, a plastic film tube is set outside the sticky layer, a sprayed layer is set outside the plastic film tube, and an anti-corrosion paint is set between the plastic film tube and the sprayed layer , A surrounding anti-corrosion layer is set on the threaded rod, and the innermost sticky layer of the anti-corrosion layer is tightly attached to the outer wall of the threaded rod. Through the setting of the outer plastic film tube, anti-corrosion paint, and spray coating, the anti-corrosion layer on the threaded rod can be effectively avoided. The metal material is eroded to ensure the service life of the threaded rod, which also improves the service life of the vacuum pump. However, the connecting ring is arranged between the stator and the threaded rod for connection, and to illustrate the specific connection structure, if the connecting ring is connected through a movable One of the stator or the threaded rod does not play a good role in preventing medium leakage. If the coatings on the connecting ring are connected to each other, the rotation of the coating on both sides will be caused by the connection between the stator and the threaded rod. In this way, the structure on the connecting ring will cause the body structure to be unstable due to frequent twisting, which will cause the problem of the fragility of the plastic film tube, making the device unable to effectively provide anti-corrosion protection for the screw vacuum pump for a long time

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