CN2292200Y - Double-sealing ring pressure-relief valve - Google Patents

Abstract

The utility model relates to a double-sealing ring pressure-relief valve which is installed on a water return pipe of a heating water return system of a full automatic oil-fired boiler. The utility model is mainly composed of a pressure-relief water tank 1, a ball float valve 2, a gate valve 3, the water return pipe 5, a valve body 6, a valve cover 7, an upper press cover 13, an O-shaped sealing ring 14, double-sealing rings 15, a piston 16, a piston rod 17, a lower press cover 18, a sealing gasket 19 and a guide cover 20. The utility model is characterized in that a water inflow manner is different, the double-sealing rings are arranged on the piston, the utility model has no leakage and has high sensitivity in working condition, the pressure of the heating system of a high building can be endured, volumes of the pressure-relief water tank and the ball float valve are reduced, the utility model has convenient transportation and installation, and the utility model is suitable for various devices which need the pressure relief.

Description

A kind of double density seal reduction valve

The utility model relates to a kind of double density seal reduction valve that uses on the reduction valve that uses on the boiler, particularly fully automatic oil-fired boiler.

Reduction valve on the popular in the market fully automatic oil-fired boiler is to adopt single seal ring mostly, and water advances from the side of valve body.This reduction valve is difficult to bear the pressure of high rise building heating system, and flow is wayward, cause leaking, and supporting break pressure cistern volume is bigger many and difficult installation of the material of consumption.

The purpose of this utility model is exactly a kind of double density seal reduction valve that is provided in order to overcome above-mentioned deficiency on the fully automatic oil-fired boiler.

Technical solution of the present utility model is such: a kind of double density seal reduction valve, mainly constitute by valve body, valve gap, upper press cover, bolt, nut, packing ring, double density seal, piston, piston rod, lower cover, sealing gasket, guide cover, and with break pressure cistern, float valve, gate valve, return pipe flange, screw and nut connect.

Now in conjunction with the accompanying drawings structure of the present utility model is illustrated.

Description of drawings:

Fig. 1 is the schematic representation of break pressure cistern.

Fig. 2 is the sectional view of double density seal reduction valve.

Mark in the accompanying drawing:

Break pressure cistern 1, float valve 2, gate valve 3, double density seal reduction valve 4, return pipe 5, valve body 6, valve gap 7, bolt 8, nut 9, packing ring 10, nut 11, packing ring 12, upper press cover 13, O RunddichtringO 14, double density seal 15, piston 16, piston rod 17, lower cover 18, sealing gasket 19, guide cover 20.

Guide cover 20, sealing gasket 19, lower cover 18 are equipped with in the bottom of piston 17, and connect with nut, packing ring, piston 16 is equipped with on the top of piston 17, two seal rings 15 are contained on the piston 16 and with upper press cover 13 and nut 11, packing ring 12 and connect, and valve body 6 connects with valve gap 7 usefulness bolts 8, nut 9, packing ring 10.

The utility model will be further described below in conjunction with accompanying drawing.

Double density seal reduction valve 4 is installed on the return pipe 5 of heating water return system, a little more than boiler water level.Under the effect of recycle pump, water advances from the lower nozzle of valve body 6, and the side pipe mouth flows out, flow to break pressure cistern 1 after, enter boiler again.The open and close of double density seal reduction valve 4 are opening and closing and realize automatic control by float valve 2 mainly, when recycle pump in the system pipeline starts, the elevated tank water level rises, the corresponding decline of water level in the stove, the float of float valve 2 is with drawdown, at this moment, water in the double density seal reduction valve 4 sluices in break pressure cistern 1 by pilot line and float valve 2, piston 16 is by system's backwater jack-up, and system water circulates, and water level rises in the stove, the float of float valve 2 also rises with water level, cause the water yield in the valve body 6 to increase, pressure also increases gradually, and piston 16 descends and makes system descending pipeline backwater close voluntarily.

The utility model has the advantage of:

1, pipeline backwater time of closing and magnetic valve or spring open and close valve compare longer, System pipeline and radiator will can not produce the hydraulic shock phenomenon.

2, compared with similar products, this valve has the water intake mode difference, the sealing on the piston After circle changed Double seal ring into, dependable performance did not have leakage and highly sensitive during duty, really Protected in service safe and reliable.

3, can bear the pressure of high rise building heating system, dwindle the volume of break pressure cistern and float valve, be convenient to transportation and installation, be suitable in the various equipment that need to reduce pressure.

Claims (1)

1, a kind of double density seal reduction valve, mainly by break pressure cistern 1, float valve 2, gate valve 3, return pipe 5, valve body 6, valve gap 7, upper press cover 13, the close circle 14 of O type, double density seal 15, piston 16, piston rod 17, lower cover 18, sealing gasket 19, guide cover 20 constitutes, guide cover 20 is equipped with in the bottom that it is characterized in that piston rod 17, sealing gasket 19, lower cover 18, and use nut, packing ring connects, piston 16 is equipped with on the top of piston rod 17, two seal rings 15 be contained on the piston 16 and with upper press cover 13 and nut 11, packing ring 12 connects, valve body 6 and valve gap 7 usefulness bolts 8, nut 9, packing ring 10 connects.

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