One-way valve of manual oil pump

Abstract

The invention relates to a one way valve of a manual oil pump, which comprises a valve plate, a spring, a valve seat with a through valve hole and an outer cover connected with the valve seat; the valve plate and the spring are sequentially positioned between the valve seat and the outer cover; the valve plate is in sealed fit with the valve seat through the spring; and at least one flow passage communicated with the through valve hole is arranged on the outer cover. After the structure is used, the one way valve is used as an independent component and is wholly pressed in the inner end of an oil inlet passage and the other end of an oil outlet passage close to a cavity; sealing positions are totally in the one way valve; two ends can place the one way valve so as to have little metalworking difficulty in the oil inlet passage and the oil outlet passage; in addition, the return of the valve plate depends on the action of the elastic force of the spring in order that the valve plate can be obliquely positioned and has reliable return; and the one way valve has good sealing effect. Therefore, in the using process of a diesel oil-water separation precipitator, the working reliability of the manual oil pump is improved to ensure continuous normal operation of the manual oil pump and bring convenience for a user to use.

Description

technical field [0001] The invention relates to a one-way valve, in particular to a one-way valve suitable for being arranged on a hand oil pump. Background technique [0002] At present, the diesel water separation precipitator includes a hand oil pump, a filter, and a water level alarm connected up and down in sequence. It is a product integrating manual oil pumping, filtration, oil-water separation, and water level alarm. [0003] The hand oil pump includes an oil inlet pipe, an oil outlet pipe, an oil inlet check valve, an oil outlet check valve, and a pump cover and a filter seat that are connected up and down to form a chamber. The side of the filter seat is connected to the oil inlet pipe and the oil outlet pipe. There are oil inlet passages, oil outlet passages and installation passages in the filter seat. The lower side of the filter seat relative to the pump cover is a groove. The outer end of the oil inlet passage and the upper end of the installation passage are...

AI Technical Summary

Problems solved by technology

[0006] 1. Since the sealing positions of the two one-way valves are all in the filter seat, the metal processing of the oil inlet passage and the oil outlet passage is difficult, and the smoothness and flatness of the inner end of the oil inlet passage and the other end of the oil outlet passage are difficult to achieve. Sealing requirements, and aluminum chips are easily produced in the filter seat during processing;

[0007] 2. Since the oil inlet valve plate and the inner end of the oil inlet channel are metal-to-metal, the oil inlet check valve is not tightly sealed and the sealing effect is poor;

[0008] 3. Since the horizontally arranged oil inlet valve slice floats in the oil, the buoyancy of the oil makes the return speed of the oil inlet valve slice slower, and the return of the oil inlet valve slice depends on its own gravity, so that the return of the oil inlet valve slice Unreliable;

[0009] 4. Regardless of the processing method (stamping, wire cutting or laser cutting, etc.), the sides of the processed oil inlet valve and oil outlet valve generally have small burrs and sharp edges, which may cause the corresponding valve The corresponding one-way valve loses its sealing effect due to the card being stuck;

[0010] 5. Due to the quality problem of domestic diesel oil, no matter what kind of impurities and dirt fall on the above-mentioned sealing and matching positions of the two one-way valves, it may cause the corresponding one-way valve to lose its sealing performance

[0011] The two one-way valves have the above-mentioned structural design defects, which cause the hand oil pump to fail and fail to work normally during the use of the diesel water separation precipitator, which brings a lot of inconvenience to the user.

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