CN2767786Y

CN2767786Y - Swing check valve

Info

Publication number: CN2767786Y
Application number: CN 200520038850
Authority: CN
Inventors: 马泽强
Original assignee: Shanghai Municipal Engineering Design Insitute Group Co Ltd
Current assignee: Shanghai Municipal Engineering Design Insitute Group Co Ltd
Priority date: 2005-01-10
Filing date: 2005-01-10
Publication date: 2006-03-29
Anticipated expiration: 2015-01-10

Abstract

The utility model discloses a swing check valve which is characterized in that the check valve also comprises a magnetic attracting mechanism arranged in a valve body, wherein the magnetic attracting mechanism comprises a magnet; a magnetic pole of the magnet points at the free end of a valve clack made of ferromagnetic material. When fluid upward pushes aside the valve clack of the swing check valve, the attraction of the magnetic attracting mechanism generates upward opening force moment to the valve clack so that the valve clack keeps in a fully opened state and the fluid does not need to consume static pressure energy for keeping the valve clack opened. Compared with the swing check valve in the prior art, the energy consumption and the adverse effect of the valve clack on the fluid flow state of the utility model are small when the fluid passes through the valve.

Description

A kind of Swing check valve

Technical field:

The utility model relates to a kind of valve, the Swing check valve on specifically a kind of pipeline that is applied to not allowing fluid countercurrent current.

Background technique:

Present known Swing check valve mainly is made up of valve body, flap and valve gap.During following current, fluid enters valve from the import of Swing check valve, and fluid is subjected to stopping of sagging flap, and flow rate of fluid reduces, and the part dynamic pressure changes into hydrostatic pressure on flap, and the flap rotation is upwardly opened; During adverse current, fluid passes back into valve from the outlet of Swing check valve, and the hydrostatic pressure of fluid makes that flap is sagging closes on the flap of opening, and flap stops fluid reflux.

Swing check valve is after following current is opened, and flap is subjected to two equal and opposite in directions, moment loading that direction is opposite all the time, and one is the sagging moment of closing that is produced by gravity, and another is the moment that upwardly opens that is produced by hydrostatic pressure.The angle that the flap unlatching is hovered is determined by the size of two moments, and changes along with the variation of two moment values.Hence one can see that, keep the Swing check valve flap to be in the static energy that opening state needs to consume fluid all the time, the opening angle of flap fluctuates because of the variation of fluid flow state, and the flap of fluctuation can produce reaction by convection cell again, the variation of aggravation fluid flow state.

Summary of the invention:

The purpose of this utility model provides a kind of Swing check valve, can reduce the energy loss of fluid when the valve, alleviates the adverse effect of flap fluid flow state.

For achieving the above object, the technical solution of the utility model is: a kind of Swing check valve, it mainly comprises valve body, the valve gap of fixedlying connected with valve body, and the flap that is positioned at valve body, one end and the valve body of this flap are rotatably connected, the other end is moving type, it is characterized in that: described safety check also comprises the magnetic mechanism that is installed in the valve body, and magnetic mechanism comprises a magnet again, the magnetic pole of this magnet points to the movable end of flap, and flap is made by ferromagnetic material.

Adopt this structure, after fluid upwardly opens the flap of this Swing check valve, the attraction force of described magnetic mechanism magnetic pole produces a moment that upwardly opens to flap, makes flap keep full-gear, and fluid need not to consume static energy into keeping flap to open.The utility model is compared with the Swing check valve of prior art, and the energy loss when fluid passes through valve and the adverse effect of fluid flow state are much smaller.

Description of drawings:

Fig. 1 is the utility model one embodiment's a structural representation

Fig. 2 is the schematic representation of the magnetic mechanism of Fig. 1

Embodiment:

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

The utility model mainly comprises valve body 1, flap 2, valve gap 3, valve gap is fixedlyed connected with valve body, be arranged in the valve body, one end of flap 2 and valve body 1 are for being rotatably connected, the other end is moving type freely, and it is different from prior art and is: described safety check also comprises the magnetic mechanism 4 that is installed in the valve body, and magnetic mechanism 4 comprises a magnet 7 again, the magnetic pole of this magnet points to the movable end of flap, and flap is made by ferromagnetic material; Magnet 7 is a horse-shoe magnet in the enforcement, described magnetic mechanism 4 also comprises support 5 and regulates bolt 6, support 5 is fixed on the inwall of valve body 1, one aperture is arranged on the support 5, one screw is arranged on the horse-shoe magnet 7, the aperture that adjusting bolt 6 passes on the support 5 screws in the screw of horse-shoe magnet 7, makes the magnetic pole of horse-shoe magnet 7 point to the movable end of flap 2.Bolt 6 is regulated in rotation, can make horse-shoe magnet 7 along the axis moving linearly of regulating bolt 6, thereby changes the distance size of the magnetic pole and the flap of horse-shoe magnet 7.Behind flap 2 standard-sized sheets, regulate the distance of magnetic pole and flap 2, change poles attract power to the moment size that flap produces, make this moment values equal to allow flap 2 keep the minimum value of full-gear.So, fluid need not to consume static energy into keeping flap 2 to open, in case and fluid countercurrent current, the hydrostatic pressure of fluid can make flap 2 sagging closing easily, the prevention fluid reflux.The end face of 7 two magnetic poles of horse-shoe magnet is the inclined-plane, and during flap 2 standard-sized sheets, the inclined-plane is parallel with flap 2, has strengthened the acting surface of pole pair flap 2, increases the effect of poles attract power to flap 2.

Claims

1. Swing check valve, it mainly comprises valve body (1), the valve gap (3) of fixedlying connected with valve body (1), and the flap (2) that is positioned at valve body (1), an end of flap (2) and valve body (2) are for being rotatably connected, and the other end is moving type, it is characterized in that: it also comprises the magnetic mechanism (4) that is installed in the valve body (1), described magnetic mechanism comprises a magnet (7) again, and the magnetic pole of this magnet (7) points to the movable end of flap (2), and flap (2) is made by ferromagnetic material.

2. a kind of Swing check valve as claimed in claim 1 is characterized in that: described magnet (7) is a horse-shoe magnet.

3. a kind of Swing check valve as claimed in claim 1 or 2, it is characterized in that: described magnetic mechanism (4) also comprises support (5) and regulates bolt (6), support (5) is fixed on the inwall of valve body (1), support has an aperture on (5), horse-shoe magnet has a screw on (7), and the aperture that adjusting bolt (6) passes on the support (5) screws in the screw of horse-shoe magnet (7).

4. a kind of Swing check valve as claimed in claim 1 or 2 is characterized in that: the magnetic pole end face of described horse-shoe magnet (7) is the inclined-plane, and the magnetic pole end face can be parallel with flap (2).