CN202228727U

CN202228727U - Novel wafer check valve

Info

Publication number: CN202228727U
Application number: CN2011200448749U
Authority: CN
Inventors: 李新华; 杨雪
Original assignee: Hangzhou xihu valve factory
Current assignee: Hangzhou xihu valve factory
Priority date: 2011-02-21
Filing date: 2011-02-21
Publication date: 2012-05-23
Anticipated expiration: 2021-02-21

Abstract

The utility model relates to a wafer check valve used for various industrial pipelines or appliances, which belongs to the valves used for various industrial pipelines or appliances and is particularly suitable for prevent the backward counterflow of media in a steam pipeline system. The wafer check valve is fixed in various pipelines or appliances by flange jointing and oppositely clamping. The wafer check valve is composed of a valve body 1, a valve clack 2, a spring 3 and a valve cover 4. The wafer check valve has the advantages of simple structure, reliable check, good seal performance, long service life, and convenience in mounting and maintenance, can close automatically, and can be installed all-dimensionally according to the principle of entry from the inlet, and exit from the outlet; a spring safe area is arranged between the valve clack and the valve cover, and the spring can not be crushed and knocked, and has a long service life; and the wafer check valve can replace the check valve with a guide post and the butterfly check valve which are commonly used at present.

Description

Novel Wafer Check Valves

Technical field

The utility model Wafer Check Valves belongs to industry and goes up the valve that various pipes or equipment are used, and is specially adapted to prevent in the system for recycling condensed water in high temperature water of condensation valve of adverse current back.

Background technique

Existing Wafer Check Valves has Swing check valve, butterfly check valve, Lift check valve.

Swing check valve: the flap of Swing check valve is in the form of annular discs; Rotating shaft around valve base channel rotates; Because of the valve internal channel becomes streamlined, flow resistance is littler than Lift check valve, is applicable to low flow velocity and the heavy caliber occasion that flows and seldom change; But should not be used for pulsed flow, its sealability is not as good as rise-fall type.

Butterfly check valve: the safety check that flap rotates around the bearing pin in the valve seat, simple in structure, rely on the torque spring forced seal, spring life is short, and sealing is relatively poor.

Lift check valve: the safety check that flap slides along the valve body vertical center line, Lift check valve can only be installed on the horizontal pipe.Flap top and bonnet lower are processed with pilot sleeve, the flap guide cylinder can be in the valve body guide cylinder free lifting, when the medium following current, flap leans on medium thrust to open, when medium arrheaed, flap leaned on from hanging down and drops on the valve seat, stops medium counter flow.The pilot sleeve wear rate of flap top and bonnet lower is big, and the pilot sleeve easy scale formation is stuck simultaneously, causes valve invalidation.

The model utility content

The purpose of the utility model provides a kind of low flow velocity, little occasion of mobile variation of not being only applicable to; Simultaneously also be applicable to pulsed flow, can arbitrarily angledly install after guaranteeing import and exporting, can be not stuck; Spring has the spring safety zone, the novel Wafer Check Valves of spring long service life.

Easy for installation, simple in structure, characteristics such as sealing reliability strong, long service life that this Wafer Check Valves also has.

In order to realize goal of the invention, the technological scheme of employing is following:

The utility model Wafer Check Valves comprises valve body, flap, spring and valve gap;

It is characterized in that:

Novel Wafer Check Valves valve body is hollow concave cylindrical worker's type body, and two ends are provided with through hole, and the entrance point through hole is a passing hole, passing hole upper end " O " type boss face and flap bottom surface fitted seal, and the outlet end size cooperates with valve gap;

Novel Wafer Check Valves flap is a little big cone table under the hollow spill; Be with the MEDIA FLOW through hole around the sidewall; The bottom surface is the plane sealing face; The frustum end face is slightly less than body cavity, and flap can only be done reciprocal translational motion in body cavity, and the spring of frustum inside top surface band one spring is spacing---spring seat;

Novel Wafer Check Valves spring is positioned between valve gap and the flap, and the control flap is done reciprocal translational motion in valve body;

Novel Wafer Check Valves valve gap is the concave cylindrical body; Two ends are through hole, and the profile size cooperates with the valve outlet end, and the valve gap upper end is a hexagonal through hole in; Interior hexagonal through hole sectional area is greater than the passing hole sectional area; Hexagonal through hole is said safety check outlet in this, and it is spacing that interior hexagonal lower end surface and sidewall constitute another spring of spring---spring seat, the reciprocal translational motion of control spring.

Valve body entrance point inner bottom surface and flap bottom surface are sealing surface, and valve gap is threadedly connected to the valve outlet end, have spring spacing between flap and the valve gap---spring seat, and the two ends of fixing spring, spring drives flap this safety check of control that moves reciprocatingly and opens and closes in valve body.Spring force makes flap get back to the valve body bottom when static, and this valve is in closed condition; Pressure medium promotes flap and makes spring shrink valve open when pressure medium reaches certain value, pressure medium during less than spring force spring force make flap get back to the valve body bottom valve to close.When guaranteeing that medium gets under the situation of valve body from entrance point, valve body is not influenced by velocity of medium and setting angle, and overcoming existing safety check can only level or vertically arranged defective.The spacing while of the spring of flap and valve cover chamber also is the safety zone of spring, and when flap contacted with valve gap, spring was in the ultimate resilience scope, and spring can not bumped against, the spring long service life.

Further, the flap of telling is the little down big hollow spill cone table of, and lower bottom part is the plane sealing face; The same size of flap sidewall band, equally distributed MEDIA FLOW through hole; And MEDIA FLOW through hole sectional area sum is greater than the latus rectum sectional area, and medium flows out from the MEDIA FLOW through hole, can not influence flow.Upper end band spring is spacing---spring seat, an end of retaining spring.The spring seat sidewall is the same with valve gap spring seat sidewall, all exceeds one section common safety zone that forms spring relatively, and spring is in the ultimate resilience scope when flap contacts with the spacing sidewall of valve gap spring, and spring can not be crushed to death.The frustum upper top is slightly less than the valve cavity internal diameter, guarantees that the reciprocal translational motion of flap in valve body is smooth and easy.

Description of drawings

Fig. 1 is the structural representation of the utility model Wafer Check Valves;

Fig. 2 is the outlet end schematic top plan view of the utility model Wafer Check Valves;

Fig. 3 is the entrance point plan view of the utility model Wafer Check Valves;

Fig. 4 is the flap schematic representation of the utility model Wafer Check Valves.

Embodiment

The utility model Wafer Check Valves is connected in various pipes or the equipment by flange, and the two ends of valve body face is solid to clamping with it through bolt by pipeline or vessel flange dish, below in conjunction with accompanying drawing the utility model is done further explanation:

The structural representation of the utility model comprises valve body 1, flap 2, spring 3, valve gap 4 shown in accompanying drawing one.

Valve body 1 is hollow concave cylindrical worker's type body, and the hole is opened at its two ends; Valve body 1 outlet end inner top is threaded with valve gap 4; The hole is opened in valve body 1 bottom, and through-hole diameter is a latus rectum; Passing hole upper end wide line of " O " type boss and the sealing of flap 2 bottom surfaces, sealing is strong;

Flap 2 places in valve body 1 bottom groove, and schematic representation is shown in figure four, and band evenly distributes with the MEDIA FLOW through hole of size on the sidewall, and the spring of frustum inside top surface band one spring 3 is spacing---spring seat; Flap 2 bottom surfaces are the plane sealing face, and the following little characteristics that big frustum make bottom surface and valve body 1 bottom surface position contacting how move total energy and hide valve body 1 passing hole;

Valve gap 4 is a hollow concave cylindrical body; An interior hexagonal through hole greater than valve body 1 bottom passing hole is opened on the top; Be convenient to valve dismounting, maintenance, be fixed in valve body 1 top with thread connecting mode, it is spacing that hexagonal through hole lower end surface and sidewall constitute another spring---spring seat;

Can arbitrarily angledly install according to " import is advanced; export out " valve; Valve gap 4 is spacing through spring with flap 2---and spring seat is fixed on spring 3 in the valve body 1, and flap 2 is done reciprocal translational motion at valve body 1 inner chamber, and valve is in closed condition when static; Medium makes spring 3 compressions open flap 2 through pressure, and medium flows out valve through flap 2 MEDIA FLOW through holes and gap; When pressure medium during less than spring 3 elastic force, valve closing, medium can not reflux, the non-return good reliability; The spring seat wall of valve gap 4 and flap 2 is high, and assurance spring 3 moves in the ultimate resilience scope and can not be crushed to death the spring long service life; Flap 2 spring seat positions are higher than flap MEDIA FLOW through hole, when flap 2 contacts with valve gap 4, do not influence this novel Wafer Check Valves flow.

Mounted valve is in closed condition, and when the MEDIA FLOW pressure of coming increases, flap 2 pressures are during greater than spring 3 elastic force, and flap 2 is to valve gap 4 direction motion valve opens, and medium is flowed through through flap 2 MEDIA FLOW through holes, and the hexagonal through holes flow out valves in the valve gap 4; The medium pressure that flows away reduces, and during less than spring 3 elastic force, spring 3 makes flap 2 get back to valve body 1 bottom to medium to the pressure of flap 2, and valve is closed automatically, so back and forth.

Claims

1. novel Wafer Check Valves, it comprises: valve body (1), flap (2), spring (3), valve gap (4);

It is characterized in that:

Novel Wafer Check Valves valve body (1) is hollow concave cylindrical worker's type body, and two ends are provided with through hole, and the entrance point through hole is a passing hole, passing hole upper end " O " type boss face and flap (2) bottom surface fitted seal, and the outlet end size cooperates with valve gap (4);

Novel Wafer Check Valves flap (2) is a little big cone table under the hollow spill; Be with the MEDIA FLOW through hole around the sidewall; The bottom surface is the plane sealing face; The frustum end face is slightly less than valve body (1) inner chamber, and flap (2) can only be done reciprocal translational motion in valve body (1) inner chamber, and the spring of frustum inside top surface band one spring (3) is spacing---spring seat;

Novel Wafer Check Valves spring (3) is positioned between valve gap (4) and the flap (2), and control flap (2) is done reciprocal translational motion in valve body (1);

Novel Wafer Check Valves valve gap (4) is the concave cylindrical body; Two ends are through hole, and the profile size cooperates with valve body (1) outlet end, and valve gap (4) upper end is a hexagonal through hole in; Interior hexagonal through hole sectional area is greater than the passing hole sectional area; Hexagonal through hole is said safety check outlet in this, and it is spacing that interior hexagonal lower end surface and sidewall constitute another spring of spring (3)---spring seat, back and forth translational motion of control spring (3).