CN2200090Y

CN2200090Y - Pressure reducing valve

Info

Publication number: CN2200090Y
Application number: CN 94225343
Authority: CN
Inventors: 苏恩远
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-02-21
Filing date: 1994-02-21
Publication date: 1995-06-07
Anticipated expiration: 2004-02-21

Abstract

The utility model relates to a stopping and pressure reducing combined valve, which is mainly applied to the water supply system of a high building. The outlet pressure reduced by the valve can maintain constant and is not influenced by the change of the inlet pressure. The utility model has the advantages of simple structure, low cost and reliable performance.

Description

Pressure reducing valve

What the present invention relates to is a kind of reduction valve that is used for the high rise building water supply system.

The present all kinds of reduction valve outlet pressures that use all can not be kept constant, and all influences that is subjected to inlet pressure in various degree by function, are not easy to device maintenance, and structure is more complicated also.

The purpose of this utility model provides a kind of reduction valve simple in structure, and the influence that its outlet pressure is not changed by inlet pressure can be kept constantly, and has the function of stop valve concurrently.

The purpose of this utility model is achieved in that this valve has a valve body, and a dividing plate is arranged in the valve body, valve body is divided into imports and exports two chambeies, and the dividing plate middle part has a garden cylinder hole that import and export are communicated with.A garden cylinder hole is also arranged at the top of valve body, the equal diameters in hole, garden on the diameter in this hole and the dividing plate, the piston that can slide up and down slides in this post hole, two gardens, and with round section joint ring respectively with the sealing of post hole, two gardens up and down, the position that piston moves upward is limited by an elastic scheibe.A pressure spring is arranged at piston top, and a bonnet is screwed in by screw thread pushes down pressure spring on the valve body.The piston upper end has a thin bar to reach bonnet outside, the position that has an elastic collar limited piston to move downward on the bar.The cavity of piston upper end is open to atmosphere.

Import and export during when piston and to be communicated with bottom, but because of piston upper and lower end equal diameters, so the axial force that the import high pressure water acts on the piston is cancelled each other.Outlet pressure acts on piston bottom, and the upwards thrust that is produced and the spring of piston upper end interact.Therefore when outlet pressure during greater than spring tension, piston moves upward and turns down inlet, adjusts mouth pressure automatically.When rotating up bonnet, the collar that bonnet drives on the piston tip upwards draws piston, and when moving the spacing collar on top to, the piston lower end diameter just in time enters in the post hole, garden on the dividing plate, and with the round section joint ring sealing, valve cuts out.

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

Accompanying drawing is the longitudinal section of present embodiment.

Among the figure the 1, the 2nd, the O RunddichtringO, the 3rd, piston, the 4th, bonnet, the 5th, packing ring, 6 and 8 is elastic collars, the 7th, pressure spring, the 9th, valve body.Left end is import, and right-hand member is outlet.

9 is valve body among the figure, piston 3 slides in the post hole, garden at valve body top and dividing plate middle part, and seal with post hole, garden with O shape circle 1 and 2, there is a pressure spring 7 the piston upper end, bonnet 4 usefulness screw threads are twisted and are pressed on the valve body, pressing spring 7, collar 8 are stuck in the movement position of going up most of limited piston on the valve body, and collar 6 is stuck in the movement position that descends most of piston upper limit piston.

When the lower end position of piston 3 in the left side, water from import by the garden post orifice flow on the valve body dividing plate to outlet, at this moment because piston equal diameters up and down, so the axial force on the inlet pressure apply piston is cancelled each other.The pressure of outlet during greater than the tension force of spring 7 piston just move upward and turn down the pressure that inlet is regulated outlet, the upper/lower positions of piston is by elastic collar 6 restrictions.When rotating up bonnet 4, bonnet upwards draws piston 3 by packing ring 5 and elastic collar 6, when moving the position of collar 8 to, corrects under the piston in the hole, garden that enters on valve body 8 dividing plates and by O shape and encloses 1 sealing, and valve is in closed condition, shown in right-hand part among the figure.

Claims

1, a kind of reduction valve, it has a valve body, an import and an outlet are arranged on the valve body, a bonnet is screwed in the top of valve body, it is characterized in that: a dividing plate is arranged in the valve body, post hole, a garden is arranged on the dividing plate, and post hole, a garden, the equal diameters in these two holes are also arranged at valve body top, a piston slides in these two holes, and, on the piston pressure spring is arranged with O shape circle and hole sealing, be pressed in below the bonnet, the thin bar of piston upper end stretches out the bonnet outside, collar is stuck in the movement position that descends most of limited piston on the bar, and another collar is stuck in the hole, garden on valve body top, limited piston go up movement position most.