CN203272894U

CN203272894U - Swing check valve

Info

Publication number: CN203272894U
Application number: CN 201320157306
Authority: CN
Inventors: 胡倩; 郑园川
Original assignee: XIAMEN LISEN ELECTRIC POWER EQUIPMENT Co Ltd
Current assignee: XIAMEN LISEN ELECTRIC POWER EQUIPMENT Co Ltd
Priority date: 2013-04-01
Filing date: 2013-04-01
Publication date: 2013-11-06
Anticipated expiration: 2023-04-01

Abstract

The utility model discloses a swing check valve which comprises a valve body, a valve core and a lifting rod, wherein the valve body is a hollow tube body whose center is raised, and the inside of the valve body is a spherical cavity; a pressure seal type valve cover is embedded into the inner side at one end of the valve body; a lock nut is arranged on the pressure seal type valve cover; the lock nut is matched and clamped with the pressure type valve cover, so that a valve body port sealing structure is formed; the valve core is placed in the spherical cavity in the center of the valve body; one end of the valve core is contacted with the lower end surface of the pressure seal type valve cover; the valve core comprises a valve seat, a valve clack and a rocking mechanism; the valve seat is arranged on the inner wall of the spherical cavity of the valve body in a clamping manner; the valve clack is connected with the valve body; one end of the rocking mechanism is matched with a set screw through a retaining nut and locked at one end of the valve clack; the lifting rod penetrates through the lock nut and the pressure seal type valve cover sequentially and is placed in the lock nut and the pressure seal type valve cover; and the lifting rod is sleeved with a sleeve.

Description

Swing check valve

Technical field

The utility model relates to a kind of check valve structure, especially a kind of Swing check valve.

Background technique

The effect of safety check is only to allow medium to flow to a direction, and stops mobile in the other direction.Common this valve is automatic operation, and under the fluid pressure action that a direction flows, flap is opened; When fluid flows, act on valve seat by the flap of coincidence certainly of hydrodynamic pressure and flap in the other direction, flow thereby cut off.Safety check refers to rely on medium itself to flow and automatic open and close flap, is used for preventing the valve that medium flows backwards, and claims again check valve, one-way valve, reflux valve and back pressure valve.Its Main Function is to prevent that medium from flowing backwards, preventing pump and drive motor counter-rotating, and the releasing of vessel media.Safety check also can be used for may rising to the auxiliary system of pressing over system to wherein pressure to be provided on the pipeline of supply.Safety check mainly can be divided into Swing check valve (according to the center of gravity rotation) and Lift check valve (moving along axis).

Existing Swing check valve, the valve rod of flap are located at above pipeline, rely on own wt and the hydrodynamic pressure of flap that it is closed.Because the valve rod of flap is located at pipeline top, the valve body of safety check need to be above pipeline headspace, cause the volume of safety check larger, cost is also higher, in closing process, flap from valve rod the part away to rotate diameter large, stroke is longer, and potential energy is large, and flow-induced corrosion is comparatively serious, sealing is relatively poor, and then causes its long service life.

Thus, the inventor considers the safety check internal structure is improved, and this case produces thus.

The model utility content

For the deficiencies in the prior art, the utility model provides a kind of Swing check valve rational in infrastructure, easy to use, and the improvement of this safety check internal structure has the advantages such as the dismounting of being convenient to, good airproof performance, corrosion protection and long service life.

For achieving the above object, the utility model is achieved through the following technical solutions:

Swing check valve, this safety check comprises valve body, spool and lifting arm, wherein:

Valve body, it is the hollow tube of central uplift, and inside is spherical chamber, and described valve body one end inboard is embedded with wiper seal type valve gap, be provided with locking nut on this wiper seal type valve gap, this locking nut coordinates clamping to form the valve body port enclosed construction with wiper seal type valve gap;

Spool, it is placed in the spherical chamber of valve body central authorities, the one end contacts with the lower end surface of wiper seal type valve gap, this spool comprises valve seat, flap, wabbler mechanism, described valve seat is placed on the inwall of the spherical chamber of valve body, and flap is connected with valve body, and an end of described wabbler mechanism matches to merge by anti-return nut and set screw and lock onto on flap one end;

Lifting arm, its pass successively locking nut, wiper seal formula valve gap and be placed in locking nut and wiper seal formula valve gap in, this lifting arm outside is arranged with sleeve.

Further, described wabbler mechanism comprises rocking arm and rocking bar; This rocking bar is fixed in the spherical chamber of valve body, and with its formation integral structure, described rocking arm one end is sheathed on rocking bar, another end is fixed in flap one end.

Further, be disposed with pad and seal ring between described locking nut and wiper seal type valve gap, described seal ring is the four-piece type Split type structure.

Further, be coated with corrosion resistant coating on described valve seat, this corrosion resistant coating possesses wear resistance simultaneously.

Advantage of the present utility model and beneficial effect:

1, valve body has spherical cavity, and the opening angle that can reduce flap reduces pressure, and realizes farthest reducing the water hammer impact;

2, this novel employing set screw is guaranteed firm connection the between the anti-return nut of wabbler mechanism and flap one end; Flap can tighten voluntarily and close in the situation that there is no media flow;

3, seal ring is the four-piece type Split type structure, is convenient to dismounting, and then is convenient to change and check;

4 and valve seat is wear-resisting and anti-corrosion treatment, extended the working life of valve.

Description of drawings

Fig. 1 is the utility model structural representation.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing:

Embodiment: see also shown in Figure 1ly, Swing check valve, this safety check comprise valve body 1, spool 2 and lifting arm 3.

See also shown in Figure 1, valve body 1 is the hollow tube of central uplift, and inside is spherical chamber 11, described valve body 1 one end inboards are embedded with wiper seal type valve gap 4, be provided with locking nut 5 on this wiper seal type valve gap 4, this locking nut 5 coordinates clamping to form the valve body port enclosed construction with wiper seal type valve gap 4; Be disposed with pad 6 and seal ring 7 between described locking nut 5 and wiper seal type valve gap 4, described seal ring 7 is the four-piece type Split type structure, is convenient to dismounting.

See also shown in Figure 1, spool 2 is placed in the spherical chamber 11 of valve body central authorities, the one end contacts with the lower end surface of wiper seal type valve gap 4, this spool 2 comprises valve seat 21, flap 22, wabbler mechanism 23, described valve seat 21 is placed on the inwall of the spherical chamber 11 of valve body, and flap 22 is connected with valve body 1, and an end of described wabbler mechanism 23 matches to merge by anti-return nut 8 and set screw (not shown) and lock onto on flap 22 1 ends; Described wabbler mechanism 23 comprises rocking arm 231 and rocking bar 232; This rocking bar 232 is fixed in the spherical chamber 11 of valve body, and with its formation integral structure, described rocking arm 231 1 ends are sheathed on rocking bar 232, another end is fixed in flap 22 1 ends.

See also shown in Figure 1, lifting arm 3 pass successively locking nut 5, wiper seal formula valve gap 4 and be placed in locking nut 5 and wiper seal formula valve gap 1 in, this lifting arm 3 outsides are arranged with sleeve 9.

Be coated with corrosion resistant coating on valve seat described in the utility model, this corrosion resistant coating possesses wear resistance simultaneously.

The above record, only for utilizing the embodiment of this origination techniques content, modification, variation that any those skilled in the art use this creation to do all belong to the scope of the claims that this creation is advocated, and are not limited to those disclosed embodiments.

Claims

1. Swing check valve, it is characterized in that: this safety check comprises valve body, spool and lifting arm, wherein:

2. Swing check valve according to claim 1, it is characterized in that: described wabbler mechanism comprises rocking arm and rocking bar; This rocking bar is fixed in the spherical chamber of valve body, and with its formation integral structure, described rocking arm one end is sheathed on rocking bar, another end is fixed in flap one end.

3. Swing check valve according to claim 1, it is characterized in that: be disposed with pad and seal ring between described locking nut and wiper seal type valve gap, described seal ring is the four-piece type Split type structure.

4. Swing check valve according to claim 1, it is characterized in that: be coated with corrosion resistant coating on described valve seat, this corrosion resistant coating possesses wear resistance simultaneously.