CN108612883A

CN108612883A - Check-valves

Info

Publication number: CN108612883A
Application number: CN201810742571.0A
Authority: CN
Inventors: 周启年
Original assignee: King Quality Group Ltd
Current assignee: King Quality Group Ltd
Priority date: 2018-07-09
Filing date: 2018-07-09
Publication date: 2018-10-02

Abstract

A kind of check-valves, including valve body, valve deck, valve seat, flap, spring, guiding trestle, the outer of the guiding trestle front end is equipped with cricoid flap guide sleeve, and the front end of the flap guide sleeve is docked with the side of valve seat, and multiple flowing holes are equipped on the flap guide sleeve；It is whole that the valve seat, flap, spring and guiding trestle are assembled into a pressure control component；The pressure control component is integrally attached in valve body using a limited block.It is an advantage of the invention that：Using approximate Venturi tube structure, fluid resistance is small, the pressure loss is few；Using shaft flow structure short stroke design, flap without hit, mechanical shock is small, noise is low；Inner body integral design facilitates repair.

Description

Check-valves

Technical field

It is to solve existing check-valves present in oilfield water extraction engineering process the present invention relates to a kind of check-valves Problem newly designs.

Background technology

Substantially there are swing check valve, lift check valve and axis stream in the check-valves that oilfield water extraction engineering uses Three kinds of formula check-valves：

1, swing check valve：Flap 5 is hinged by swing arm 9 and valve body 1, and the keying of valve is realized by the rotation of swing arm 9.It is excellent Point is that flow resistance is relatively small；The disadvantage is that poor sealing performance, water bell pressure is big, sealing surface is easy to damage, service life is short, and repairs It is inconvenient（See Fig. 1）.

2, lift check valve：Flap 5 is slidably connected at by elevating lever 10 in the slideway on 1 top of valve body, and lifting is passed through The keying of valve is realized in the lifting of bar 10.Advantage is that good seal performance, water bell pressure are small, easy to maintenance；The disadvantage is that flow resistance is big（See Fig. 2）.

3, axial flow type check valve：The side center of flap 5 is connect with guide rod 8, and guide rod 8, which is slidably inserted into, is located at valve body 1 In guiding trestle on axis, it is set with spring 6 outside guide rod 8, passes through the keying of the flexible realization valve of guide rod 8.It is excellent Point is good seal performance, water bell pressure is small, flow resistance is small；The disadvantage is that repair is inconvenient（See Fig. 3）.

Above-mentioned prior art common problem is：Since there are solid impurity, these impurity in pipeline and medium It can be stuck on sealing surface, keep flap pass not in place, valve sealing face can be also damaged when serious, so that valve is can not achieve its due Function；It is unstable additionally, due to strata pressure, cause the pressure change of system frequent, be mounted on the check-valves before pump need it is frequent It opens and closes, this just makes the reduced service life of valve and noise is big；So often needing repairing or replacing valve.

Invention content

The purpose of the present invention is in view of the deficienciess of the prior art, providing a kind of reasonable design, technologically advanced novel Product, the product flow resistance be small, good seal performance, water bell pressure are small, easy to maintenance.

To achieve the above object, this present invention is adopted the technical scheme that：A kind of check-valves, including valve body, valve deck, valve Seat, flap, spring, guiding trestle, valve deck are mounted on top end of the valve body and form valve cavity, set respectively in the front-end and back-end of valve body There is entrance and exit, valve seat is equipped in the entrance inner end；Middle part in valve cavity is equipped with guiding trestle, flap back center Guide rod be slidably inserted into the axle center hole at guiding trestle rear portion, spring, the front side of flap and valve seat pair are housed on the guide bar It answers, which is characterized in that the outer of the guiding trestle front end is equipped with cricoid flap guide sleeve, the front end of the flap guide sleeve It is docked with the side of valve seat, multiple flowing holes is equipped on the flap guide sleeve；The valve seat, flap, spring and guiding trestle group It is whole to dress up a pressure control component；The pressure control component is integrally attached in valve body using a limited block.

It is an advantage of the invention that：Using approximate Venturi tube structure, fluid resistance is small, the pressure loss is few；Using axial-flow type knot Structure short stroke design, flap without hit, mechanical shock is small, noise is low；

Inner body integral design facilitates repair.

Description of the drawings

Fig. 1 is the overall structure diagram of existing swing check valve；

Fig. 2 is the overall structure diagram of existing lift check valve；

Fig. 3 is the overall structure diagram of existing axial flow type check valve；

Fig. 4 is the overall structure diagram of the present invention;

Fig. 5 is the A-A sectional views (removal pressure control component) of Fig. 4；

Fig. 6 is the B-B sectional views (removal pressure control component) of Fig. 4.

Specific implementation mode

Referring to Fig. 4, a kind of check-valves of the present invention, including valve body 1, valve deck 2, valve seat 4, flap 5, spring 6, guiding trestle 7, Valve deck 2 is mounted on 1 top of valve body and forms valve cavity, and entrance 11 and outlet 12 are respectively equipped in the front-end and back-end of valve body 1, The entrance inner end is equipped with valve seat 4；Middle part in valve cavity is equipped with guiding trestle 7, and the guide rod 8 of 5 back center of flap is slided It is dynamic to be inserted into the axle center hole at 7 rear portion of guiding trestle, spring 6 is housed on guide rod 8, the front side of flap 5 is corresponding with valve seat 4, It is characterized in that, the outer of 7 front end of guiding trestle is equipped with cricoid flap guide sleeve 71, the front end of the flap guide sleeve 71 It is docked with the side of valve seat 4, multiple flowing holes 72 is equipped on the flap guide sleeve 71；It the valve seat 4, flap 5, spring 6 and leads It is whole it to be assembled into a pressure control component to holder 7；The pressure control component is integrally attached in valve body 1 using a limited block 3.

11 inner end of entrance in the valve body 1 and outlet inner end be respectively equipped with after valve seat 4 and flap guide sleeve 71 Hold the preceding U-lag 13 and back support of cooperation（Slot）14, by the valve seat 4 of the pressure control component entirety front end and flap guide sleeve 71 Rear end is able to be mounted in preceding U-lag 13 and back support 14 from valve body openings above；The limited block 3 it is following Shape and the top of valve seat 4 coordinate, and the both ends of the limited block 3 are respectively fixed by the top of screw and U-lag 11.

Flap guide sleeve 71 is oriented to for flap 5, and the axle center hole with 7 rear portion of guiding trestle is that the guide rod 8 of flap 5 is oriented to, Ensure that flap 5 moves in the axial direction at work, overcomes the prior art and be only oriented to by 7 rear portion of guiding trestle（Due to being oriented to The abrasion of bar 8）It is easy to cause the drawbacks of leakproofness declines caused by 5 radial deflection of flap.

It is tapered rounding off at the valve cavity and the inner end of outlet 12, valve cavity is designed as approximate text Structure in mound, when fluid flows through valve flowing channel the cross section in channel be gradually expanded, diminishing process again, reduce to greatest extent The generation of vortex, the pressure loss for reducing valve.

The pressure control component that movable valve seat 4 is assembled into flap 5, spring 6 and guiding trestle 7 is an entirety, is mounted on In the inner cavity of valve body 1.The input end of valve body 1（Left end in figure）If there are one the supports of smooth plane and a lower semicircular shape （Referring to Fig. 5）, outlet end is set there are three supporting plane（Referring to Fig. 6）；The smooth flat of input end forms the close of valve with valve seat 4 Cover ensures not leak when valve is closed；The plane of input end and the three of outlet end supporting planes limit pressure control component jointly Axial displacement；Semicircle support and limited block 3 limit the radial displacement of pressure control component jointly.When needing repairing, only need to open Valve deck 2, the screw for backing out limited block 3, you can the pressure control component part of all inside is disposably taken out, it is convenient and efficient.

Claims

1. a kind of check-valves, including valve body, valve deck, valve seat, flap, spring, guiding trestle, valve deck is formed mounted on top end of the valve body Valve cavity is respectively equipped with entrance and exit in the front-end and back-end of valve body, and valve seat is equipped in the entrance inner end；In valve cavity Interior middle part is equipped with guiding trestle, and the guide rod of flap back center is slidably inserted into the axle center hole at guiding trestle rear portion, is leading Spring is housed on bar, the front side of flap is corresponding with valve seat, which is characterized in that the outer of the guiding trestle front end is equipped with ring The flap guide sleeve of shape, the front end of the flap guide sleeve are docked with the side of valve seat, and multiple mistakes are equipped on the flap guide sleeve Discharge orifice；It is whole that the valve seat, flap, spring and guiding trestle are assembled into a pressure control component；Using a limited block by the pressure control Component is integrally attached in valve body.

2. check-valves as described in claim 1, which is characterized in that the entrance inner end in the valve body and outlet inner end point The preceding U-lag and back support that She You not coordinate with valve seat and flap guide sleeve rear end, by the valve of the pressure control component entirety front end The rear end of seat and flap guide sleeve is able to be mounted in preceding U-lag and back support from valve body openings above；Described The following shape of limited block and the top of valve seat coordinate, and the both ends of the limited block are respectively fixed by the top of screw and U-lag.

3. check-valves as described in claim 1, which is characterized in that be tapered at the inner end of the valve cavity and outlet Rounding off.