CN2076631U

CN2076631U - Pressure reducing valve

Info

Publication number: CN2076631U
Application number: CN 90223846
Authority: CN
Inventors: 厉述淮
Original assignee: Aimeike Metallic Products Ltd Ningbo
Current assignee: Aimeike Metallic Products Ltd Ningbo
Priority date: 1990-11-14
Filing date: 1990-11-14
Publication date: 1991-05-08

Abstract

The utility model relates to a pressure reducing valve, comprising a valve body, a valve clack rack, a valve clack, a valve cover, a film, a spring, a regulating bolt, etc. The pressure reducing valve is characterized in that the valve clack rack with a double-pull rod structure ensures the simultaneous movement of the valve clack and the sensing element film, and a bent pipe arranged in the internal cavity of the valve body makes the valve clack rack pass around a medium channel. When outlet pressure exceeds a setting value, the film overcomes spring force to synchronously drive the valve clack to lift upward, and when the valve clack reaches to sealing specific pressure, an inlet medium is broken. When outlet pressure decreases, the spring force drives the film and the valve clack rack to move downward. When a valve seat is opened, outlet mediums are communicated, and the pressure increases again to obtain a dynamic pressure reducing effect. The pressure reducing valve has simple structure, low cost, rapid response without hysteresis, small pressure pulsating value, high valve quality, and long service life.

Description

Pressure reducing valve

The utility model relates to reduction valve, particularly the water supply system reduction valve.

Along with developing by leaps and bounds of national economy, tall building constantly occurs, but level the more, supplies water more to be a problem, toward dirty, pressure increases water gradually from the top layer water tank, causes overpressure and destroys pipeline and tap, floor rooms 30 for example, when the water that top layer gets off arrived the 20th layer, its pressure was 4kgf/cm ², when arriving the 10th layer, pressure increases to 8kgf/cm ², to bottom, pressure reaches 12kgf/cm ², and the pipeline authorized pressure of civil building has only 2kgf/cm ², office building 3kgf/cm ², above-mentioned each stressor layer has all exceeded permitted value.Traditional solution is to take 1--2 dwelling unit every the 8--10 layer to make water tank, carries out segmentation and supplies water, and this just causes the waste in a large amount of rooms for building, if replace these intermediate water tanks with reduction valve, is effective way.The reduction valve of prior art, as the direct effect Diaphragm reducing valve of Ministry of Machine and Electronics Industry, not only these valve complex structures, and with the flap of the cutout of medium for export with disconnected from each other as the film of sensing element, can not synchronization motion, flap reset and dynamic seal (packing) power is provided by thrust spring.After the medium cutout, because the differential pressure action of outlet pressure and inlet pressure, flap is continued to compress to valve seat, this moment, outlet pressure moved down, as opening flap, must overcome the hydrostatic pressure that is caused by pressure reduction earlier, prolonged the time, make outlet pressure that bigger pulsating quantity be arranged, further the increase export pulsating quantity of pressure of the effect of inertia of flap and spring has reduced the quality of reduction valve.In addition, because the static pressure of pressure reduction makes flap be subjected to surpassing the required pressure of seal pressure, this alternating stress greatly reduces the life-span of the flap of being made by elastic material, often makes defective valve.

The purpose of this utility model is to avoid the deficiencies in the prior art and provides a kind of simple in structure to society, reduction valve reasonable in design, that cost is low, it can make as the flap of outlet medium cutout and film as sensing element and be synchronized with the movement, thereby reduce the outlet pressure pulsating quantity, improve the quality of valve.

Accompanying drawing is a structural representation of the present utility model.

Be described in detail according to above-mentioned accompanying drawing embodiment below.

The embodiment of the utility model reduction valve is the improvement that directly acts on Diaphragm reducing valve.Inner chamber at valve body (1) is equipped with valve petal shelf (11), this valve petal shelf (11) has the duplex pull rod structure, plate by upper and lower two parallel disks and both sides links into an integrated entity, integral cast forms, it is walked around medium channel film (9) direct and that be positioned between valve body (1) and the valve gap (8) and is fastenedly connected by lower spring cup (4), the lower end of valve petal shelf (11) and lower cover (12) Spielpassung, the valve petal shelf (11) that can lead is done upper and lower axial motion together with the flap (10) of screw on it.The valve petal shelf of duplex pull rod structure (11) assurance that to be flap (10) be synchronized with the movement with film (9) as sensing element.There are one 90 ° of bend pipes (3) in valve body (1) inner chamber inlet, its end communicates with the medium import, the other end promptly becomes valve seat (2), it imports and exports the medium cutout by flap (10) control, bend pipe (3) stretches in the middle of interior two plates of valve petal shelf (11), and realization valve petal shelf (11) is walked around the purpose of medium channel.The spring (5) of regulating film (9) amount of deformation is positioned between upper spring seat (6) and the lower spring cup (4), by regulating the adjusting that is used for reaching the outlet pressure setting value of bolt (7).

Medium enters bend pipe (3) by import, and enter outlet plenum by the gap between valve seat (1) and the flap (10), when outlet plenum pressure surpasses setting value, static pressure makes film (9) overcome spring (5) pressure and upwards lifts, driving valve petal shelf (11) and flap (10) synchronously upwards lifts, when flap (10) contacts with valve seat (2) and reaches seal pressure, the cutout of import medium, promptly reach the static pressure decompression, when the outlet medium continued outflow, outlet plenum pressure descended, at this moment, spring (5) thrust makes film (9) drive valve petal shelf (11) and moves down, and flap (10) is lifted off a seat (2), and the import medium is communicated with the outlet medium, pressure rises to setting value again, press the said process cycling, promptly reach dynamic decompression purpose, and make outlet pressure remain on less pulsating quantity.

Press the pressure-reducing valve of the utility model design, Yu Yuan You pressure-reducing valve Xiang ratio, it is simple in structure, the Zao valency is low, flap Yu the Yun of film movingly has that the Ying of Xianging is fast, behind no Zhi, the You points such as no additonal pressure have improved the Zhi amount of pressure-reducing valve, the service life that Yan has grown valve. Simultaneously, also have the fixed economic benefit of Yi and social benefit, take skyscraper as example, suppose that per 10 layers are established 1 water tank, its Zhan of Yi is according to lives in Zhai area 60m²Meter, Zao valency 2000 Yuan of skyscraper/m² Zong expense Wei 120,000 Yuan, as use this pressure-reducing valve, every layer of 8 unit of Yi, 10 layers of totally 80 unit calculating, price 150 Yuan of valve/platform meter, 150 Yuan/platform * 80=1.2 ten thousand Yuan, ten/Yi that Zhe explanation Zong expense Zhi You Yuan comes simultaneously, also economizes out the housing unit of Zuo Wei water tank for society need.

Claims

1, a kind of reduction valve, the valve petal shelf (11), flap (10), upper and lower spring seat (6), (4), spring (5), the adjusting bolt (7) that comprise valve body (1), valve gap (8) inner chamber, film (9) is positioned between valve body (1) and the valve gap (8), it is characterized in that:

A. the valve petal shelf (11) that is positioned at valve body (1) inner chamber has the duplex pull rod structure, it walk around medium channel directly and film (9) be fastenedly connected, be fixed with the lower end and lower cover (12) Spielpassung of the valve petal shelf (11) of flap (10);

B. there are one 90 ° of bend pipes (3) in valve body (1) inner chamber inlet, and the one end communicates with import, and the other end is valve seat (2);

C. bend pipe (3) stretches in the valve petal shelf (11).

2, reduction valve as claimed in claim 1 is characterized in that described valve petal shelf (11) is that plate by upper and lower two parallel disks and its both sides is connected in aggregates.