Design method of self-priming valve
A design method, self-priming valve technology, applied in mechanical equipment, liquid variable capacity machinery, variable capacity pump components, etc., can solve the problems of reduced pump efficiency and reliability, reduced self-priming performance, and lax valve closure. , to improve flow conditions, improve pump efficiency and reliability, improve performance and operational reliability
Active Publication Date: 2014-08-20
JIANGSU UNIV
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Problems solved by technology
[0003] At present, there are few design methods for this type of self-priming pump in China, especially for the design of the self-priming valve of this type of self-priming pump, which lacks a systematic design method. The valve is often used, although its principle and structure are simple, and it is convenient to control the self-priming of the pump, but there is also a relatively prominent problem, that is, the valve is not closed tightly, and the leakage is heavy, which cannot ensure that the pump is at a normal water level under variable working conditions. , when the displacement pump fails or the vacuuming stops, the self-priming valve cannot work effectively, which not only causes the hydraulic loss of the self-priming pump and the reduction of self-priming performance, but also reduces the efficiency and reliability of the pump
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[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.
[0034] figure 1 It is a schematic diagram of the structure of the self-priming valve, mainly composed of valve body 1, floating ball 2, ejector rod movable sleeve 3, ejector rod 4, air valve port cover 5, valve body cover 6, sealing rubber plate 7, rubber plate fastening nut 8 Composition, the air valve cover 5 is provided with a valve hole 9. The valve body cover 6 is connected to the air inlet of the vacuum pump, and the valve body 2 is connected to the top of the self-priming pump inlet. Before the normal operation of the self-priming pump, under the gravity of the floating ball 2, the sealing rubber plate 7 is separated from the air valve port cover 5, so that the valve hole 9 on the air valve port cover 5 is in an open state. Inhalation is carried out through the p...
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The invention provides a design method of a self-priming valve. According to the method, the diameter (D) of a floating ball, the opening area (s) of a valve bore and the wall thickness (a) of the floating ball of the self-priming valve are determined by adoption of several relational expressions. By means of the design method of the self-priming valve, hydraulic loss of a self-priming pump is reduced, the self-priming performance is improved, and efficiency and reliability of the pump are improved.
Description
technical field [0001] The invention belongs to the mechanical field, in particular to a design method of a self-priming valve. Background technique [0002] General self-priming pumps do not have other special self-priming devices, such as internal mixing and external mixing self-priming pumps. This type of self-priming pump has low pump efficiency and poor cavitation performance due to backflow holes, liquid storage chambers, etc. worse. The self-priming pump with a self-priming device needs to be equipped with a volumetric pump for vacuuming and other air pumping devices. In the design of the pump, the self-priming valve determines the self-priming performance of the pump and the vacuum degree of the pump to a large extent. plays a key role. [0003] At present, there are few design methods for this type of self-priming pump in China, especially for the design of the self-priming valve of this type of self-priming pump, which lacks a systematic design method. The valv...
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Inventor 付强朱荣生王秀礼
Owner JIANGSU UNIV