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Check valve

A check valve, closed-stop technology, applied in the direction of control valves, valve devices, functional valve types, etc., can solve problems such as troublesome molding, increased flow resistance, and complex shapes of opening restriction parts

Inactive Publication Date: 2011-07-27
TOYODA GOSEI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the opening degree restricting part has a problem that the shape is complicated and molding is troublesome
In addition, there is another problem that when the valve plate is elastically deformed to open the valve largely, the flow path resistance increases, making it difficult to smoothly supply fuel.

Method used

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Examples

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Embodiment Construction

[0035] (1) Outline structure of oil supply unit FS

[0036] figure 1 It is a schematic diagram showing a fuel supply device FS for supplying fuel to a fuel tank FT of an automobile. Such as figure 1 As shown, the fuel supply device FS is connected to the fuel tank FT, and delivers the fuel supplied from the fuel supply gun (not shown) to the fuel tank FT. Inlet; metal or resin oil inlet pipe IP, which is connected to one end of the filling nozzle FN; rubber oil inlet hose H, which is connected to the oil inlet pipe IP; fuel tank pipe connector 10, which is connected to the oil inlet One end of the hose H is connected and welded to the fuel tank FT; and the check valve 20 is integrally assembled with the fuel tank pipe connection body 10 . The fuel inlet hose H is press-fitted into the fuel tank pipe connection body 10 and fastened with the clamp CP. According to the structure of the above-mentioned fuel supply device FS, if the fuel cap FC is removed during fuel supply, an...

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PUM

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Abstract

The invention provides a check valve, which has a simple structure and can prevent a stop closure part (31) of a valve plate (30) opened or closed on a convection outlet (21b) from being excessively opened and reduce the flow path resistance during a valve opening process. The check valve comprises a path forming part (21) and a valve plate formed by cutting and bending a flexible thin plate. The path forming part comprises an installing part (24) for installing the valve plate. The valve plate comprises a stop closure part, an installed part (34) and a flexible deforming part (36). The installing part has an opening-degree limit part (28) provided with a limiting plane (28a). The limiting plane is provided with a following space which substantially keeps an angle bending state and meanwhile performs flexible deformation with a part connecting the flexible deforming part and the installed part as a pivot when the stop closure part is pushed by the fluids flowing through a path (21a). By the abutting against the flexible deforming part of the limiting plane, the opening angle of the stop closure part relative to the fluid outlet is limited.

Description

technical field [0001] The present invention relates to a check valve mounted on a fuel supply pipe or the like for introducing fuel into a fuel tank of a vehicle. Background technique [0002] Currently, it is known that a fuel tank of an automobile has a check valve for preventing the fuel from returning to the outside due to the rising internal pressure of the fuel tank when fuel supply is stopped (for example, refer to Patent Document 1). . That is, the check valve includes: a passage forming member having an outflow port through which fuel flows out of the passage; and a valve plate attached to the passage forming member to open and close the outflow port. An attached portion is formed by bending the valve plate at one end of the closing portion, and by attaching the attached portion to a mounting portion formed on the outer peripheral portion of the passage forming member, the outlet is opened and closed by the closing portion. [0003] In the above-mentioned check v...

Claims

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Application Information

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IPC IPC(8): F16K15/16B60K15/04
Inventor 金子健一郎
Owner TOYODA GOSEI CO LTD
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