CN2628828Y

CN2628828Y - Self-operated auto-differential control valve

Info

Publication number: CN2628828Y
Application number: CN 03264206
Authority: CN
Inventors: 刘万岭; 符永正; 崔笑千; 周福全
Original assignee: Hebei Balance Valve Manufacture Co ltd
Current assignee: Hebei Balance Valve Manufacture Co ltd
Priority date: 2003-05-31
Filing date: 2003-05-31
Publication date: 2004-07-28
Anticipated expiration: 2013-05-31

Abstract

The utility model provides a self-operated self-psid controlling valve. A valve handle is arranged inside the inner cavity of a valve body, the top of the valve handle is fixed and connected with a pressure sensing membrane and a spring, and the bottom of the valve handle is arranged with a valve plug and a gland bush. The inner cavity of the valve body comprises three sub-cavities divided into by the pressure sensing membrane and the valve plug, i.e. a top airproof cavity, a left below entrance pressure cavity and a right below exit pressure cavity, and a connecting pipe arranged at the -the-membrane airproof cavity of the valve body and connected with the left below entrance pressure cavity. The utility model is novel in structure, innovative in design, steady in performance, reliable in controlling, low in cost, simple to operate and convenient to use. The valve has the prominent functions that when no pressure is exerted, the valve works as a normally closed valve plug. When exceeding the setting psid, the valve turns on automatically to keep fore-and-aft psid relatively invariable. The utility model is widely applicable to the protection of heat and cold source, central heating and other engineering applications, and is a novel self-operated psid-controlling valve.

Description

Self-powering type self differential pressure control valve

Technical field

The utility model relates to a kind of valve of mechanical engineering technical field, especially a kind of Differential Pressure Controller.

Background technique

Along with heat supply and the especially continuous development of household metering heating engineering of Air-conditioning Engineering, also more and more higher to the topology requirement and the technical requirements of Differential Pressure Controller.In known technology, existing Differential Pressure Controller mainly is made up of valve body load valve gap, valve seat, spool, valve plug, spring, pressure-sensitive diaphragm, seals and other component.It is to utilize to change pre-pressure of the spring, realizing the adjusting of control pressure reduction, is valve plug open in usual when no pressure, and the pressure-sensitive film drives the valve plug motion during valve work, keep controlled system pressure reduction constant, and this constant be because the operating pressure differential before and after the valve change to be realized, its complex structure, complex operation, control pressure reduction regulation range is little, application area is narrower, and use is severely limited, and causes inconvenience.

Summary of the invention

In order to overcome the technical deficiency of existing differential pressure control valve, the utility model provides a kind of novel structure, and cost is low, and control pressure reduction regulation range is big, and application is wide, manipulates easy new-type pressure reduction adjusting control valve.

The technological scheme that its technical problem that solves the utility model adopts is: with load valve rod in the body cavity of differential pressure control valve, valve rod top be connected pressure-sensitive film and spring, stem bottom installing valve plug and sealing gasket, body cavity is divided into top seal chamber and following left part inlet pressure chamber, three branch chambeies, lower right section outlet pressure chamber by pressure-sensitive film and valve plug, and be equiped with PRESSURE PIPE at valve body top seal chamber place and be communicated with valve body right part outlet pressure chamber, the self-powering type that consists of self differential pressure control valve (also claiming the bypass type differential pressure control valve).The outstanding function of this type valve is to be the Normally closed type valve plug when no pressure, after exceeding setting pressure reduction, open automatically, drive valve plug by the pressure-sensitive film and under differential pressure action, work automatically, when opening state is worked, no matter how the operating mode of system changes, and the inlet outlet pressure differential of valve remains constant relatively; In the time of in off position, the pressure reduction of valve both sides must reach the setting pressure difference and could open.The realization of these functions is without any need for external impetus, and its key is the unique texture that depends on valve self.

Self-powering type of the present utility model self differential pressure control valve is a household metering particularly in cold ﹠ heat source protection and centralized heating project, supports the novel modulating valve that the user moves from the main variable flow amount.Its application in heating and ventilation project: the one, the application aspect the protection cold ﹠ heat source.In Heat Supply Engineering, because meterage is carried out in heating, the user strengthens greatly from the consciousness of main regulation flow, and life changes greatly with hot water consumption within a day in addition, makes the flow of heating system that very big excursion be arranged.Therefore, this novel self-powering type self differential pressure control valve of installing just can guarantee that the flow of cold ﹠ heat source is relatively stable, has both protected cold ﹠ heat source, has improved the stability for the source unit operation again.The 2nd, the application in central heating system can be used for solving central heating engineering high building and the low constructional height desired aspects such as contradiction that pressure working condition is differed greatly and produces of each heating user that differ greatly effectively, has unique effect.This differential pressure control valve is that controlling object is different with the main distinction of other Differential Pressure Controller, and it is the pressure reduction of control valve self, makes it to keep constant.

Because technique scheme is adopted in the utility model design; it has novel structure; design innovation, stable performance, control is reliable; with low cost; economical and practical, simple to operate, advantage such as easy to use; extensively being suitable for using in engineerings such as cold ﹠ heat source protection and central heat supply, is a kind of novel Differential Pressure Controller.

Description of drawings

Below in conjunction with drawings and Examples the utility model is described in further detail.

Fig. 1 is the sectional view of the utility model embodiment concrete structure.

Reference character: 1 valve body, 2 pressure springs, 3 pressure-sensitive films, 4 PRESSURE PIPE, 5 valve rods, 6 valve plugs, 7 sealing gaskets.

Embodiment

Embodiment as shown in Figure 1, the utility model is by differential pressure control valve valve body 1, valve rod 5, pressure-sensitive film 3, spring 2, valve plug 6, sealing gasket 7 and PRESSURE PIPE 4 are formed, vertical load valve rod 5 in valve body 1 inner chamber, the top of valve rod 5 be connected pressure-sensitive film 3 and spring 2, the bottom load valve plug 6 and the sealing gasket 7 of valve rod 5, valve body 1 inner chamber is divided into Seal cage on the film by horizontal pressure-sensitive film 3, pressure-sensitive film 3 lower chamber are divided into left part inlet pressure chamber and right part outlet pressure chamber by valve plug 6 again, and the Seal cage place is fitted with the PRESSURE PIPE 4 of being with control valve on the film of valve body 1, PRESSURE PIPE 4 the other ends are communicated with the outlet pressure chamber of valve body 1 right part, the right chamber of valve body outlet pressure are imported the Seal cage on pressure-sensitive film top in the valve body by PRESSURE PIPE 4.And be shaped on the pod apertures that is communicated with the upper and lower chamber of pressure-sensitive film at valve rod 5 body of rod tops, and regulate the pressure ratio that changes pressure-sensitive film upper and lower cavity by the control valve on the PRESSURE PIPE 4, realize the adjusting of pressure reduction before and after the valve.

Claims

1, a kind of self-powering type self differential pressure control valve, it comprises valve body, the pressure-sensitive film, valve plug, spring, it is characterized in that also comprising valve rod (5), sealing gasket (7) and PRESSURE PIPE (4), vertical load valve rod (5) in valve body (1) inner chamber, the top of valve rod (5) be connected pressure-sensitive film (3) and pressure spring (2), the bottom load valve plug (6) of valve rod (5) and sealing gasket (7), the inner chamber of valve body (1) is divided into film top seal chamber by horizontal pressure-sensitive film (3), pressure-sensitive film lower chamber is divided into left part inlet pressure chamber by valve plug (6) again, right part outlet pressure chamber, and the Seal cage place is fitted with the PRESSURE PIPE (4) of being with modulating valve on the film of valve body (1), PRESSURE PIPE (4) the other end is communicated with the right part outlet pressure chamber of valve body (1), and is shaped on the connection pressure-sensitive film at valve rod (5) body of rod top, the pod apertures of cavity of resorption.