CN2405089Y

CN2405089Y - Noise elimination check valve

Info

Publication number: CN2405089Y
Application number: CN 00210693
Authority: CN
Inventors: 田旭景; 田荣辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-01-26
Filing date: 2000-01-26
Publication date: 2000-11-08
Anticipated expiration: 2010-01-26

Abstract

The utility model relates to a novel noise-elimination check valve. At present, the interior of the noise-elimination check valve used at home and abroad is provided with a compression spring to push up a valve clack, the head loss is large, and the energy consumption is serious. The micro-resistance and slow-closing check valve is used for replacing the noise-elimination check valve at home, which has backward flowing of water and backward rotation of pumps before closing, the service life of the machine is affected, and the noise-elimination effect is poor. The interior of a valve body of the utility model is provided with a piston cylinder. The interior of the piston cylinder is provided with a piston component. The end part of the piston component is connected with a valve clack. A compression spring is sheathed between the piston cylinder and the valve clack. When the pump operates, the utility model can eliminate the backward pressure application of the compression spring on the liquid flow. When the pump is stopped, the water does not backwards flow, the pump does not backwards rotate, and the utility model is closed without noise. The utility model has the characteristics of energy saving, good noise-elimination effect, simple structure, safety, durability, no influence on the service life of the machine, etc.

Description

Novel damping check valve

The utility model relates to a kind of safety check.The water hammer noise pollution work or the living environment that produce during for the elimination closure of check ring, delivery side of pump should be adorned damping check valve.

At present, abroad some industrially developed country as U.S.'s tall building water supply system, generally adopt flat damping check valve.More domestic architects from reducing the energy dissipation angle consider how to replace with Tiny Drag Slow Shut Check Valves.The former is equipped with pressure spring to withstand flap in valve, liquid stream must overcome spring after the flap applied pressure behind the turn on pump, and valve could be opened.Execute to the increasing of the reverse pressure of liquid stream in company with valve opening and increase owing to spring, therefore this valve loss of head is big, and energy very take seriously.Its noise elimination effect is to be that cost exchanges for long-term energy dissipation.The latter is complex structure, valve body heaviness not only, makes and the maintenance cost height, and maintenance is inconvenient, and the noise elimination effect is not good enough; Simultaneously liquid flows backwards before the valve closing, the unit reversing, relative reduction unit durability.

For overcoming above-mentioned defective, the purpose of this utility model is to design a kind of not only energy-conservation but also effective novel damping check valve of eliminating the noise.

The utility model is made up of valve body, flap, piston assembly, piston cylinder and pressure spring, piston assembly 6 is loaded in the piston cylinder 7, the end is connected with flap 4, flap 4 outer rims are equipped with O RunddichtringO 3, piston cylinder 7 is loaded on the center of valve body 9, pressure spring 5 is set between the afterbody and flap 4 of piston cylinder 7, and cylinder cap 8 is equipped with in piston cylinder 7 ends.

The utlity model has energy saving, eliminate characteristics such as noise, safety durable, low cost of manufacture.

Accompanying drawing is the utility model longitudinal sectional drawing, represents this valve closed condition.

Below in conjunction with description of drawings the utility model working principle:

After pump started, because spring is oppositely exerted pressure to liquid stream, when flap was not opened as yet, liquid stream entered the A chamber of piston cylinder 7 by the hollow tube of piston assembly 6.Pump rotates, and valve water inlet pressure increases, and piston assembly 6 drives flaps 4 and moves to the B chamber, and spring 5 is compressed, so it flows reverse applied pressure to liquid and be eliminated, and flap 4 is opened.Open the back owing to the resistance of valve internal to liquid stream, still there are pressure reduction in valve inlet and outlet, prevent 6 resiliences of flap assembly, and liquid stream need not to overcome the pressure of spring 5, so has reduced loss of head, has eliminated the chronic energy waste.

When cutting off the electricity supply, liquid stream is at the pressure reduction of valve inlet and outlet, to dwindle in company with the reduction gradually of pump rotating speed and liquid in pipe flow velocity, the pressure reduction in piston cylinder 7A, B two chambeies can not stop pressure spring 5 to flap 4 pressuring directions, therefore, before liquid in pipe was reduced to zero flow velocity, valve just can noiselessly be closed, and realized the purpose of not only energy-conservation but also noise elimination.

Claims

1. novel damping check valve is made up of valve body, piston assembly and piston cylinder, it is characterized in that: piston assembly 6 is loaded in the piston cylinder 7, the end is connected with flap 4, the cone outer rim of flap 4 is equipped with O RunddichtringO 3, piston cylinder 7 is loaded on the center of valve body 9, pressure spring 5 is set between the cylinder tail and flap 4 of piston cylinder 7, cylinder cap 8 is equipped with in piston cylinder 7 ends, the steady nail 2 of valve seat 1 usefulness is fixed in the flange plate of valve water inlet, reaches the open and close of flap 4 with medium in the A chamber of piston cylinder 7 and the stretching of pressure reduction control pressure spring 5 in B chamber.