Filter for fuel dispenser system

Abstract

The invention provides a multifunctional filter for a fuel dispenser system. The filter comprises a filter body with a fluid inlet and a fluid outlet, and a filter cover, wherein at least two stage filter elements are arranged inside the filter body, and the diameter of each stage filter element is gradually increased, and each stage filter element is sleeved on the periphery of the superior filter element in sequence; and one end of the filter element is connected with the fluid inlet of the filter body, and the periphery of the filter element is connected with the fluid outlet of the filter body. In the multifunctional filter, the multi-stage filter elements are arranged inside the same filter body by adopting a sleeving connection mode, so the functions which can be realized after the conventional multi-stage filters are connected in series can be realized in one filter body, the structure of the filter is simplified, the space of the filter in the fuel dispenser is reduced, and materials and manufacture cost are simultaneously saved; and meanwhile, the lower part of a filter mesh at the fluid inlet is provided with a slag collecting trough, so impurities in fluid can be effectively stored, and are prevented from falling into crude oil.

Description

technical field [0001] The invention relates to a filter, in particular to a filter used in a fuel dispenser system. Background technique [0002] At present, in the fuel dispenser system, there are many kinds of filters used for filtering fluids such as fuel oil. When multi-stage filtration is required, the common filtering method is to add one or one filter on the basis of the fluid primary filter. The filter with similar structure above makes the fluid pass through multiple stages of filtration, so as to achieve the purpose of multi-stage filtration. When this method is adopted, the installation state of the filter in the system is as follows: figure 1 or figure 2 As shown, 1 in the figure is a multi-stage filter structure in which two first-stage filters are connected in series; however, this type of filter has a complex structure and is difficult to process, and bolts and spring washers are required for the connection of the two filter bodies It is not only inconveni...

AI Technical Summary

Problems solved by technology

[0002] At present, in the fuel dispenser system, there are many kinds of filters used for filtering fluids such as fuel oil. When multi-stage filtration is required, the common filtering method is to add one or one filter on the basis of the fluid primary filter. The filter with similar structure above makes the fluid pass through multiple stages of filtration, so as to achieve the purpose of multi-stage filtration. When this method is adopted, the installation state of the filter in the system is as follows: figure 1 or figure 2 As shown, 1 in the figure is a multi-stage filter structure in which two first-stage filters are connected in series; however, this type of filter has a complex structure and is difficult to process, and bolts and spring washers are required for the connection of the two filter bodies It is not only inconvenient to use, but also easy to affect the filtering effect due to poor sealing effect, and its material cost and maintenance cost are also greatly increased. In addition, the filter with this structure makes the flow of the fluid longer, and its pressure The loss is also large; due to the complex structure of this filter, sand casting is often used for its processing. This manufacturing method has poor molding performance, high manufacturing cost, and the filter has a rough appearance and poor quality reliability after molding.

[0003] In order to overcome the various defects of the above-mentioned filters, there are also multi-stage filters with a structure of multi-stage filter elements connected in series. Although the structure of the multi-stage filter is relatively simplified, it effectively overcomes the problems of the above-mentioned multiple filters connected in series. The sealing problem, but because the filter elements of all levels are connected in series, the filter housing is also long, so it cannot solve the defects of long fluid flow and large pressure loss; at the same time, due to the large volume of the filter body, and the Multiple filter caps may be used, so filter material and tooling costs are high

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