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Pressure reducing valve

A pressure reducing valve, pressure technology, applied in valve device, valve details, fluid pressure control and other directions, to achieve the effect of improving sealing, realizing light weight, and improving anti-shedding load

Inactive Publication Date: 2012-06-06
KEIHIN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, it has been considered to reduce the cost by using a diaphragm made of a disc-shaped rubber plate whose thickness at the sealing part is constant in a natural state, but in this case, it is necessary to secure the diaphragm. Sealing and detachment becomes a problem

Method used

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Examples

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Embodiment 1

[0049] Figure 1 to Figure 14 shows an embodiment of the present invention.

[0050] First, in figure 1 Among them, the pressure reducing valve for gas is used to depressurize compressed natural gas as fuel gas and supply it to the engine (not shown), and the pressure reducing valve for gas includes: The main body 16 which is combined and constituted, and the diaphragm cover 17 which is combined with the main body 16, the valve mechanism 20 is housed in the said main body 16, and the relief valve 21 is arrange|positioned.

[0051] The main body 16 is configured by stacking the first main body member 18 and the second main body member 19 up and down and fastening them at multiple places. A receiving hole 23 is provided in the central part of the first main body part 18. The receiving hole 23 extends in the vertical direction and has an inward shoulder 22 protruding radially inward at the upper end. The receiving hole 23 passes through the inward shoulder. From the 22 side, t...

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Abstract

A pressure reducing valve in which a diaphragm rod interconnected with a valve body of a valve mechanism is connected to the center of a diaphragm whose peripheral edge is held between a body and a diaphragm cover. The diaphragm (28) is constructed from a disc-shaped rubber plate whose thickness at least at its peripheral edge is uniform in a natural state. The peripheral edge of the diaphragm (28) is compressed and held between a flange (17b) of the diaphragm cover (17) and a holding surface (91) of the body (16), and thus the diaphragm cover (17) is fixed to the body (16). In this state, that portion of the diaphragm (28) which is located between the flange (17b) and the holding surface (91) and at which the gap between them is the smallest is located on the inside radially of that portion of the diaphragm (28) at which the gap is the largest. The construction reduces the weight and cost of the pressure reducing valve, improves sealing ability of the diaphragm, and prevents the diaphragm from coming out of place.

Description

technical field [0001] The present invention relates to a pressure reducing valve, wherein the peripheral portion of the diaphragm is clamped between the main body of the housing valve mechanism and the diaphragm cover fixed to the main body, and a pressure acting chamber is formed between the diaphragm and the main body , and a spring chamber is formed between the diaphragm and the diaphragm cover, the spring accommodated in the spring chamber is compressed and arranged between the diaphragm case and the diaphragm, and the central part of the diaphragm The connected diaphragm rod is connected to the spool of the valve mechanism. Background technique [0002] In Patent Document 1, there is known a pressure reducing valve in which a peripheral portion of a diaphragm is sandwiched between a partition wall member and a bottomed cylindrical diaphragm cover, the partition wall member constitutes a part of the main body, and the diaphragm The cover is formed by performing die mol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K31/128F16K31/365F16K51/00
CPCG05D16/0663F16K31/128
Inventor 山本博晓千叶豊斋藤芳夫中岛要治
Owner KEIHIN CORP
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