CN2380765Y

CN2380765Y - Double-way non-return hard-sealed swing check valve

Info

Publication number: CN2380765Y
Application number: CN 99224084
Authority: CN
Inventors: 池凤彩
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-06-08
Filing date: 1999-06-08
Publication date: 2000-05-31
Anticipated expiration: 2009-06-08

Abstract

The utility model provides a swing check valve with double-way check and hard sealing. The utility model comprises a valve body, valve plates, valve shafts, a sealing cover, etc., wherein, the central part of the valve body is provided with a pair of valve seats with opposite sealing surfaces. The parts of two valve shafts extending into the valve body are respectively and fixedly provided with a press stick. The other end of each press stick is hinged with the valve plate. The valve plate is matched with the valve seats, and then a symmetrically swing-out and internal-closing type transmission valve is formed. The valve shaft on the exterior of the valve body is provided with a pair of gear wheels. The utility model is novel and reasonable, and has double-way check function. The two valve seats use two valve plates to simultaneously open and close. The utility model has the advantages of double-layer sealing function, good sealing effect, abrasion resistance, high temperature resistance, long service life, and labor-saving opening and closing.

Description

A kind of dual check seals Swing check valve firmly

The utility model belongs to the valve technology, relates in particular to a kind of backflow gate.

No matter the butterfly valve of present employed employing valve plate rotary-open type and safety check class are soft seal or hard sealing structure, all can only play unidirectional cut-out non-return or barrier effect.Its fatal shortcoming is: medium (gas or liquid) must enter by the direction of valve appointment, otherwise, when valve is in when closing, because the actuating pressure of flowing medium gives compaction forces greater than valve plate with contacting of sealing surface of seat, or other reasons causes valve plate and valve base chamber the gap to occur, will cause medium to leak round about, thus accidents caused or cause energy waste.Find by retrieval, notification number is that the Chinese patent " a kind of dual way check valve " of CN2148233Y discloses a kind of dual check valve technology, during this valve closing, commutation motion about valve plate can only be done, contact with valve seat is unidirectional, but be not that valve plate contacts with left and right sides valve seat simultaneously, it is the individual layer sealing configuration, and it is tight to be difficult to reach sealing, so for forbidding the occasion of dielectric leakage still can't use, especially as safety check, medium back flow can make valve plate and valve seat produce very big impact noise, not only influence life of valve, but also the noise of must taking measures to reduce.

The purpose of this utility model is overcoming under the prerequisite of unidirectional, the above-mentioned defective of individual layer safety check, provides the open and close simultaneously of a kind of bivalve seat bivalve plate, the dual check Swing check valve that its sealing surface is opposing.

The utility model is achieved in that this dual check seals Swing check valve firmly and comprises valve body, valve plate, valve shaft and sealing cover etc., the centre at material import and export two ends is provided with the opposing seal valve seat of a pair of its sealing surface in valve body, two valve shafts stretch into and respectively install a pressure on the axle of valve inner and turn, the other end that each pressure turns is hinged by link and valve plate, valve plate matches with seal valve seat, form the external opening and internal close type drive valve of a symmetry, by the valve shaft transmitting torque.

Two valve shafts of described Swing check valve are arranged in parallel, valve shaft stretch out valve body the axle on a pair of pitch wheel is housed, wherein a valve shaft is a driving shaft.Described gear is full-depth tooth or fan tooth gear, is connected with valve shaft with key, and manual, the pneumatic or electronic mode of driving shaft employing is come transmitting torque, at the other end of valve shaft counter weight device is housed.The opposing seal valve seat of described two sealing surfaces can adopt assembling type, also but integral solder forms, sealing surface of seat becomes 0 ° of-25 ° of angle of cut setting with the valve body vertical center line, the center line in valve shaft hole be located at the valve channel center line above or below, also can be located at a side perpendicular to channel centerline.Also can be provided with circulation through hole with exterior at the central space position of above-mentioned two seal valve seats.On described valve plate, be provided with earrings, can flexibly connect with pressing the axis hole that turns, press to turn and adopt transition fit, and available jackscrew is affixed with valve shaft by little axle.

The utility model dual way check valve novel structure, reasonable in design, not only be applicable to hard sealing, equally also be applicable to soft sealing structure; The boundary dimension (L) that this valve has kept original " flange Swing check valve series ", has real dual check function, the bivalve plate open and close simultaneously of bivalve seat, has the double-layer seal effect, when closing, no matter medium from which direction enters, and all will produce the dual check sealing function, can not leak; Owing to adopted the gear interlocking gear, can play the effect of mutual restriction again, pressure medium is big more, and sealing effect is just good more; In off position down, utilize two circulation through holes between the valve seat to inject freezing mixture and cool off valve seat and valve plate, can be high temperature resistant, and improve its working life; Before the unlatching, between valve seat and valve plate, inject circulation medium, can also reduce starting torque.

The utility model will be further described by embodiment below in conjunction with accompanying drawing.

Accompanying drawing 1 is the longitudinal sectional view of the utility model Swing check valve.

Accompanying drawing 2 is the side view of the utility model Swing check valve.

Accompanying drawing 3 is the side view of accompanying drawing 2.

As can see from Figure 1 this safety check mainly comprise two-way valve body 1, press turn 2, valve plate 5, valve shaft 6 and sealing cover 8.Centre apart from the material import and export two ends in valve body 1 is provided with the opposing valve seat of a pair of sealing surface 4, two valve seats 4 are symmetrical arranged, its sealing surface can become 0 ° of-25 ° of angle of cut with valve body 1 center line, and present embodiment is 0 ° of angle of cut, and promptly two sealing surfaces parallel perpendicular to valve body 1 center line.Valve seat 4 can adopt fabricated construction, makes of soft or hard sealing material, also can adopt integrated type weldering Hardmetal materials to make.Two valve shafts 6 are arranged in parallel, present embodiment valve shaft centerline hole is located at the top of valve body 1 channel centerline, valve shaft 6 stretches into to be fixed with to press on the axle of valve body 1 inside and turns 2, present embodiment adopts transition fit between the two, and affixed with jackscrew 7, to press and to turn 2 the other end and be hinged by link and valve plate 5, present embodiment is provided with a pair of earrings 3 at the back side of valve plate 5, flexibly connect with pressing the axis hole that turns on 2 by little axle 12 and baffle ring 13, and lock (as shown in Figure 2) with cotter pin 14.Valve plate 5 is to pack into from the two ends of valve body 1 respectively, thereby D ₁Must be greater than D _NValve plate 5 and valve seat 4 match, and form the external opening and internal close type drive valve of a symmetry.Stretch out at valve shaft 6 on the axle of valve body 1 an outside side pitch wheel 10 respectively is housed, and with key 9 connections, gear 10 can be full-depth tooth or fan tooth, decides on diameter valve that meshed center distance A should guarantee two gear mutual noninterferences, sees also accompanying drawing 2 and 3.The axis hole position of passing valve body 1 at valve shaft 6 is provided with flange, and seals (seeing accompanying drawing 2) with gland 11.Have the installation access hole above valve shaft 6, with sealing cover 8 sealings, sealing cover 8 preferred design become two, respectively two cavitys about the sealing.Handle is set up in outer end at a valve shaft 6, and as driving shaft, as long as handle with sleeve, by interlocking gear, promptly two gears 10 just can drive two valve plates 5 and make switching motion simultaneously, and this valve also can adopt pneumatic or electronic mode to come transmitting torque.For reducing switch moment, can counter weight device be housed at the other end of valve shaft 6, turn a ballasting method as employing.The space position of the utility model safety check between two valve seats 4 also can be provided with the circulation through hole 15 with exterior, during valve closing, by this through hole 15, inject refrigerant in the cavity of outside between valve seat 4 to the cooling that circulates of valve seat 4 and valve plate 5, just can improve its wear resistance and high temperature resistant property, open before the valve plate 5, in cavity, inject circulation medium (liquid or gas), can alleviate keying moment greatly.

Claims

1. a dual check seals Swing check valve firmly, comprise valve body, valve plate, valve shaft and sealing cover etc., the centre that it is characterized in that material import and export two ends in valve body is provided with the opposing seal valve seat of a pair of its sealing surface, two valve shafts stretch into and respectively install a pressure on the axle of valve inner and turn, the other end that each pressure turns is hinged by link and valve plate, valve plate matches with seal valve seat, forms the external opening and internal close type drive valve of a symmetry, by the valve shaft transmitting torque.

2. Swing check valve according to claim 1 is characterized in that described two valve shafts are arranged in parallel, valve shaft stretch out valve body the axle on a pair of pitch wheel is housed, wherein a valve shaft is a driving shaft.

3. Swing check valve according to claim 2 is characterized in that described gear is full-depth tooth or fan tooth gear, is connected with valve shaft with key, and manual, the pneumatic or electronic mode of driving shaft employing is come transmitting torque, at the other end of valve shaft counter weight device is housed.

4. according to claim 1,2 or 3 described Swing check valves, it is characterized in that the opposing seal valve seat of described two sealing surfaces adopts assembling type or integral solder to form, sealing surface of seat becomes 0 ° of-25 ° of angle of cut setting with the valve body vertical center line, the center line in valve shaft hole be located at the valve channel center line above or below, or perpendicular to a side of channel centerline.

5. Swing check valve according to claim 4 is characterized in that described sealing surface of seat becomes 0 ° of angle of cut setting with the valve body vertical center line, and the center line in valve shaft hole is located at the top of valve channel center line.

6. according to claim 1,2 or 3 described Swing check valves, it is characterized in that being provided with circulation through hole with exterior at the central space position of described two seal valve seats.

7. Swing check valve according to claim 1 is characterized in that being provided with earrings on described valve plate, flexibly connects with pressing the axis hole that turns by little axle, presses to turn with valve shaft and adopts transition fit, and is affixed with jackscrew.