Diaphragm type negative pressure valve used for conveying sewage water
A technology of sewage transportation and diaphragm type, which is applied in the direction of diaphragm valve, diaphragm, valve details, etc., to achieve the effect of reliable sealing, simple structure and reliable opening
Active Publication Date: 2009-02-18
ENVIROSYST BEIJING ENVIRONMENTAL ENG & TECH CO LTD
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
[0003] The purpose of the present invention is to provide a diaphragm negative pressure valve for sewage transportation, which mainly solves the technical problems of further improving the reliability of opening the negative pressure valve and speeding up the opening speed
Method used
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Embodiment 2
[0041] Example two such as image 3 As shown, the return and maintenance of the lifting device can be replaced by the return compression spring 26 instead of the permanent magnet attraction.
Embodiment 3
[0042] Embodiment three such as Figure 4 As shown, for the lifting device, when the stroke is large, the return of the lifting device may be affected due to the limitation of the effective suction distance of the permanent magnet. combination. The return compression spring 26 guarantees that the lifting device gets back in the effective attraction area of the permanent magnet 5 .
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The invention relates to a membrane passive valve used to transmitting sewage. The lower tube wall of valve between the sewage inlet and outlet is arranged with a cam higher than the middle axle of valve. The sealing membrane is elastic cover plate connected with the drawing rod of lifter. The low face of sealing membrane is toward to the cam. The support face at the edge of valve opening and above the cam is formed with a sealing face. The sealing face is connected with an annular middle compressor whose outer ring is covered by a lower cylinder. The middle ring of the middle compressor compresses the sealing face. The inner ring of the middle compressor forms an annular table supporting the upper and lower clamping plates. The annular table is embedded with a permanent magnet and a vibration reducing pad. The upper and lower clamping plates are fixed with the absorber that relative to the permanent magnet. The upper and lower clamping plates are arranged with a chamber between which contains the chamber at the upper end of the drawing rod of lifter, to form flexible connection. The invention has simple structure and reliable seal.
Description
(1) Technical field [0001] The invention relates to a valve of a negative pressure system, in particular to a negative pressure valve suitable for a sewage system. (2) Background technology [0002] Traditional negative pressure valves are used to open / close negative pressure channels. It mainly includes a valve body, a sealing diaphragm and a lifting device using negative pressure as the driving force. In most cases, the sewage inlet of the valve body is in a positive pressure state, while the sewage outlet on the other side is in a negative pressure state, with the center of the valve body as the boundary, half of the sealing diaphragm is under positive pressure, and the other half is under negative pressure. Since the tie rod and the lifting mechanism are rigidly connected, when the sealing diaphragm is compressed and deformed, installation stress will be generated, which often leads to deflection of the screw and the tie rod fixedly connected with it. When this deflecti...
Claims
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IPC IPC(8): F16K7/12F16K31/126F16K31/08
CPCF16K7/126F16K31/084F16K31/365
Inventor 张健高世宝
Owner ENVIROSYST BEIJING ENVIRONMENTAL ENG & TECH CO LTD