CN201141445Y - Bidirectional hard-sealing non-abrasion rail butterfly valve - Google Patents

Abstract

The utility model discloses a double hard-sealed zero wear rail butterfly valve. A guiding groove is arranged on an upper valve rod, a guide pin is arranged on a supporting frame, and one end of the guide pin is inserted into the guiding groove; an inclined plane is produced at the lower end of the upper valve rod, and forms a cam matching mechanism with the square eye at the upper part of a valve plate, and the other end of the valve plate is articulated with a lower valve rod; the lower valve rod and the upper valve rod share an axial line, and the other end of the lower valve rod is arranged in the axle hole at the bottom part of the valve body; the axial lines of the upper and lower valve rods are overlapped with the central axial line of the flange of the valve body; the valve plate forms a valve main seal pair with the floating valve seat installed in the valve body, the floating valve seat is an entity round sleeve arranged into the axle hole side of the valve body, the inner surface of the floating valve seat is a cone-shaped sealing surface, a sealing groove is arranged on the excircle surface, a sealing part is arranged into the sealing groove to be sealed with the valve body, the floating valve seat can axially slide in the valve body through the action of the medium pressure, and the spherical sealing surface of the valve plate and the cone-shaped sealing surface of the floating valve seat both adopt hard seal. The rail butterfly valve is a double hard-sealed zero wear rail butterfly valve which has zero wear, low torque and high intensity and can meet the use requirement of the double-sealed working condition.

Description

Two-way hard seal zero wearing and tearing Track butterfly valve

Technical field

The utility model relates to a kind of valve, particularly relates to a kind of two-way hard seal zero wearing and tearing Track butterfly valve.

Technical background

Existing butterfly valve has structural types such as center line formula, single off-centre, two off-centre and three off-centre, and sealing divides soft seal and hard sealing two classes.Center line formula, single off-centre, two off-centre mostly are soft sealing structure, and these several valves sealing surface when opening and closing all has friction in various degree, has the defective that bearing capacity is low, seal failure is fast; Two off-centre and three off-centre can adopt hard sealing structure, but its radial disbalance structure makes the valve plate unbalanced force big, causes valve opening and closing moment big, does not have the two way sealed performance.

The model utility content

Technical problem to be solved in the utility model provides a kind of intensity height, and zero wearing and tearing, low moment of torsion can satisfy the two-way hard seal zero wearing and tearing Track butterfly valve of two way sealed operating mode usage requirement.

In order to solve the problems of the technologies described above, the two-way hard seal that the utility model provides zero wearing and tearing Track butterfly valve, comprise drive part, support, valve body and valve plate, be installed in upper valve rod and the lower valve rod that is installed in the valve body bottom on valve body and the support, described upper valve rod is provided with guiding groove, described support is provided with guide finger, and described guide finger one end inserts and forces the orbiting motion of described upper valve rod along described guiding groove in the described guiding groove; Described upper valve rod lower end is shaped on the inclined-plane, forms the cam matching mechanism with the square earhole in described valve plate top, and the other end of described valve plate and described lower valve rod are hinged; Described lower valve rod and described upper valve rod coaxial line and the other end are located in the bottom axis hole of described valve body; Described upper and lower valve rod axis and valve flange central axes; Described valve plate is formed valve primary seal pair with the floating valve seat that is installed in the valve body, described floating valve seat is an entity circle cover that has the axis hole side to pack into from valve body, its internal surface is a conical seal (contact) face, periphery has seal groove, by pack at described seal groove Sealing and described valve seal, described floating valve seat can slide in described valve body vertically in the effect by pressure medium, and the spherical sealing surface of described valve plate and the conical seal (contact) face of described floating valve seat are hard sealing.

Described lower valve rod is connected with adjusting screw rod with gland nut by divided ring, and described gland nut is locking by screw locking, and described adjusting screw rod is connected and its side of being provided with, lower end tenon with tapped hole on the cover plate by the screw thread at its middle part; Locking nut by thread bush on described adjusting screw rod, and with cover plate locking, prevent that adjusting screw rod is loosening; Described cover plate is connected with described valve body by the 3rd bolt and nut.

Bottom covers described adjusting screw rod and is connected with described cover plate by the 4th bolt and nut.

Adopt the two-way hard seal zero wearing and tearing Track butterfly valve of technique scheme, break away from the back rotation mode earlier because valve plate and floating valve seat sealing surface adopt, thereby eliminated the phase mutual friction between sealing surface in the opening-closing process, reduce steering force and refuse, improve working life; Adopt relocatable hard entity valve seat simultaneously, when the valve positive pressurization, floating valve seat does not move under the support of valve body, and this moment, working principle was with common unidirectional butterfly valve, by the cut-out of forced seal realization medium; When the reverse pressurized of valve, floating valve seat can be under valve inlet outlet pressure differential active force, draw close from the trend valve plate, the resiliently deformable of compensation valve rod, valve plate, and in safety coefficient, the unsteady automatically adjustment displacement along with the variation of pressure medium, the contact that remains sealing surface realizes the cut-out of medium both having realized the requirement of two way sealed.Simultaneously be provided with the step that cooperates with valve body on valve seat, this step can prevent the jam of dirt by the effect of pushing, and ensures the flexible operation of valve seat.

When driving valve, drive the Stem Mut rotation by the handwheel on the driving mechanism, make on the upper valve rod by screw thread and to move, this moment, guide finger was in the straight trough part of upper valve rod guiding groove, upper valve rod drives valve plate by the tail end inclined-plane and promptly moves to deviating from floating valve seat sealing surface direction backward, thereby the sealing surface of valve plate is recessed backward from the floating valve seat sealing surface rapidly with approximate stop valve opening ways, after two sealing surfaces separate certain distance, guide finger begins to change over to the spiral chute part by the straight trough of upper valve rod, Stem Mut continues to drive valve rod and rises, force valve rod to pass through the square earhole in valve plate upper end and drive valve plate half-twist, valve complete opening; When closing valve, upper valve rod moves down, being subjected to the guide finger restriction must move along the helical trajectory of guiding groove, valve rod drives the valve plate half-twist by square earhole, guide finger is got back to upper valve rod guiding groove straight trough part, is rotated further handwheel upper valve rod is descended, and forces the inclined-plane to push down valve plate forward promptly to drawing close the motion of floating valve seat sealing surface direction, make the sealing surface of valve plate and the sealing surface of valve seat close the mode pressing with approximate stop valve, valve is closed fully; Driving valve and closing in the process of valve valve plate rotation, sealing surface is contactless all the time.The floating valve seat sealing surface is the conical surface, and valve plate is a sphere, because valve seat is installed in the valve body, is reserved with flying height, valve seat is had look for middle ability automatically.Simultaneously, because of the component machining error, during assembling, sealing surface of valve plate may be misfitted in Vertical direction with sealing surface of seat, at this moment, thereby can rotate the height that adjusting screw rod is adjusted lower valve rod, to adjust the height of valve plate with spanner, the sealing surface of its sealing surface and valve seat is fitted like a glove, reach the leakage test requirement.

In sum, adopt the two-way hard seal zero wearing and tearing Track butterfly valve of technique scheme, because the sealing surface of the sealing surface of valve plate and valve seat adopts entity to seal firmly, the sealing surface of valve plate motion conditions is to break away from rotation more earlier, defectives such as thereby it is low to have overcome intensity, easy to wear.Simultaneously, by entity floating valve seat structure, make this valve have the two way sealed performance.And single eccentric position structure of valve rod eliminated the unbalanced force of valve plate action under hydraulic action, reduced steering force and refused.Therefore this two-way hard seal zero wearing and tearing Track butterfly valve has the feature that the usage requirement of two way sealed operating mode is satisfied in zero wearing and tearing, low moment of torsion, intensity high energy.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is a structural representation of the present utility model;

Fig. 3 is the valve opening original state;

Fig. 4 is the valve closing state;

Fig. 5 is the sealing of valve forward, and valve body supports floating valve seat;

Fig. 6 is that valve oppositely seals, and the floating valve seat displacement replenishes valve rod, valve plate resiliently deformable.

Embodiment

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

Referring to Fig. 1 and Fig. 2,handwheel 1 drives Stem Mut 5 by gear-box 4, and protective housing 2 is enclosed within on the gear-box 4, has the hole on the protective housing 2, indicatesbar 3 and is installed in theupper valve rod 6 screw top holes, and protective housing 2 is passed on the top; The screw rod ofupper valve rod 6 can rotate under the transmission of Stem Mut 5 and move up and down; Gear-box 4 is installed on thesupport 14 by first bolt andnut 33; First plane bearing 9 and second plane bearing 91 are housed on the cylindrical of Stem Mut 5, be fixed in bybearing gland 7 in the top circular hole ofsupport 14, bearinggland 7 is connected withsupport 14 by the screw thread on the cylindrical, swivel bearinggland 7 can be adjusted the gap of first plane bearing 9 and second plane bearing 91, first plane bearing 9 and second plane bearing 91 are rotated flexibly, and prevent the loosening ofbearing gland 7 by theCock screw 8 that is installed in thesupport 14 top tapped holes; The middle part symmetry ofsupport 14 has two apertures, wherein is fixed withguide finger 12, and the other end ofguide finger 12 inserts in the guidinggroove 13 ofupper valve rod 6, forces the orbiting motion ofupper valve rod 6 along guidinggroove 13, andguide finger 12 ends are bygland 11 and screw 10 location; The bottom ofsupport 14 is provided with seam, cooperates with the cylindrical seam of sealingaxle sleeve 36 on being installed invalve body 15;Sealing 37 is installed in the seal groove of sealingaxle sleeve 36, and sealingaxle sleeve 36 is connected withvalve body 15 byscrew 34; The lower end ofupper valve rod 6 is provided with inclined-plane 19, forms the cam matching mechanism with thesquare earhole 191 invalve plate 18 tops, and the bottom square opening ofvalve plate 18 is hinged bypin 20 andlower valve rod 21; Square earhole is formed by two, is connected withvalve plate 18 with 391 withpositioning dowel 39 and 381 byscrew 38; The spherical sealing surface ofvalve plate 18 is formed hard sealing pair with thefloating valve seat 17 inner conical sealing surfaces that are installed in thevalve body 15; The other end oflower valve rod 21 inserts in the bottom axis hole ofvalve body 15, and is connected with adjustingscrew rod 24 withgland nut 23 by dividedring 22, and adjustingscrew rod 24 can rotate freely in the axis hole of the lower end oflower valve rod 21, but can not move up and down; Adjustingscrew rod 24 is connected with tapped hole on thecover plate 27 by the screw thread at its middle part, and the side of being provided with, thelower end tenon 31 of adjustingscrew rod 24 can be applied mechanically adjustable spanner and pull adjustingscrew rod 24 rotations; Lockingnut 30 by thread bush on adjustingscrew rod 24, and withcover plate 27 locking, prevent that adjustingscrew rod 24 is loosening.Cover plate 27 is connected withbottom 32 withvalve body 15 respectively with the 4th bolt andnut 29 by the 3rd bolt andnut 28.

Drive valve: referring to Fig. 3, counterclockwiserotate handwheel 1, driving Stem Mut 5 by gear-box 4 rotates, because Stem Mut 5 is limited in thesupport 14 by first plane bearing 9 and second plane bearing 91, under the effect ofbearing gland 7, can not move up and down, this moment,guide finger 12 was in the straight trough part of guidinggroove 13, therefore,rotation hand wheel 1 promptly drivesupper valve rod 6 and rises, promptly drivevalve plate 18 top jaws part backward by inclined-plane 19, move to deviating from sealing surface, the sealing surface that makes the sealing surface ofvalve plate 18 andfloating valve seat 17 is recessed rapidly backward with approximate stop valve opening ways; Be rotatedfurther handwheel 1,upper valve rod 6 continues to rise, andpin 12 enters the spiral part of guidinggroove 13, andupper valve rod 6 drives the track half-twist ofvalve plate 18 along guiding groove, valve complete opening by square earhole;

Close valve: referring to accompanyingdrawing 4, clockwise direction rotateshandwheel 1, driving Stem Mut 5 by gear-box 4 rotates, this moment,guide finger 12 was in the spiral part of guidinggroove 13, rotatinghandwheel 1 moves downupper valve rod 6, being subjected to guidefinger 12 restrictions must move along the helical trajectory of guidinggroove 13,drive valve plate 18 half-twists by inclined-plane, valve rodlower end 19,guide finger 12 is got back to the straight trough part of guidinggroove 13, being rotatedfurther handwheel 1 descendsupper valve rod 6, force inclined-plane 19 to push downvalve plate 18 backward, to drawing close the sealing surface motion, make the sealing surface ofvalve plate 18 and the sealing surface offloating valve seat 17 close the rapid pressing of mode with approximate stop valve, valve is closed fully.

The forward pressure-bearing: referring to Fig. 5,upper valve rod 6drives valve plate 18 under the driving force effect, press to valve seat, andfloating valve seat 17 makesvalve plate 18 andfloating valve seat 17 produce seal pressure by the support ofvalve body 15, realizes that medium cuts off.

Reverse pressure-bearing: referring to Fig. 6,valve plate 18 is under the pressure medium effect, driveupper valve rod 6 andlower valve rod 21 and produce resiliently deformable to deviating from the valve seat direction, at this moment, floatingvalve seat 17 is under the pressure medium effect, produce displacement to the direction of being close tovalve plate 18, replenish the resiliently deformable ofvalve plate 18 and last lower valve rod and produce specific pressure, realize that medium cuts off with sealing surface.

Assembling is adjusted: referring to Fig. 1 and Fig. 2, because the influence of component machining error, during assembling,valve plate 18 sealing surfaces may be misfitted in Vertical direction withfloating valve seat 17 sealing surfaces; At this moment, thereby can rotate the height that adjustingscrew rod 24 is adjustedlower valve rod 21 with the spanner side of clampingtenon 31, its sealing surface fits like a glove, and reaches the leakage test requirement.

Adopt the two-way hard seal zero wearing and tearing Track butterfly valve of technique scheme, because the sealing surface of the sealing surface of valve plate and valve seat adopts hard sealing, the sealing surface of valve plate motion conditions be that disengaging is rotated again earlier, thus defective such as it is low to have overcome intensity, easy to wear.Simultaneously, by the floating valve seat structure, make this valve have the two way sealed performance.And single eccentric position structure of valve rod eliminated the unbalanced force of valve plate action under hydraulic action, reduced steering force and refused.This two-way hard seal zero wearing and tearing Track butterfly valve has the feature that the usage requirement of two way sealed operating mode is satisfied in zero wearing and tearing, low moment of torsion, intensity high energy.

Claims (3)

1, a kind of two-way hard seal zero wearing and tearing Track butterfly valve, comprise drive part, support (14), valve body (15) and valve plate (18), be installed in the upper valve rod (6) on valve body (15) and the support and be installed in the lower valve rod (21) of valve body (15) bottom, it is characterized in that: described upper valve rod (6) is provided with guiding groove (13), described support (14) is provided with guide finger (12), and described guide finger (12) one ends insert and force the orbiting motion of described upper valve rod (6) along described guiding groove (13) in the described guiding groove (13); Described upper valve rod (6) lower end is shaped on inclined-plane (19), forms the cam matching mechanism with the square earhole in described valve plate (18) top (191), and the other end of described valve plate (18) and described lower valve rod (21) are hinged; Described lower valve rod (21) is located in the bottom axis hole of described valve body (15) with described upper valve rod (6) coaxial line and the other end; The axis of described upper valve rod (6) and lower valve rod (21) and the dead in line of valve body (15) flange center; Described valve plate (18) is formed valve primary seal pair with the floating valve seat (17) that is installed in the valve body (15), described floating valve seat (17) is an entity circle cover that has the axis hole side to pack into from valve body (15), its inner headed face is a conical seal (contact) face, periphery has seal groove, by Sealing (16) and described valve body (15) sealing of packing at described seal groove, described floating valve seat (17) can slide by the effect of pressure medium in described valve body (15) vertically, and the conical seal (contact) face of the spherical sealing surface of described valve plate (18) and described floating valve seat (17) is hard sealing.

2, two-way hard seal according to claim 1 zero wearing and tearing Track butterfly valve, it is characterized in that: described lower valve rod (21) is connected with adjusting screw rod (24) with gland nut (23) by divided ring (22), described gland nut (23) is locking by screw (25) locking, and described adjusting screw rod (24) is connected and its side of being provided with, lower end tenon (31) with tapped hole on the cover plate (27) by the screw thread in the middle part of it; Locking nut (30) by thread bush on described adjusting screw rod (24), and with cover plate (27) locking, prevent that adjusting screw rod (24) is loosening; Described cover plate (27) is connected with described valve body (15) by the 3rd bolt and nut.

3, two-way hard seal according to claim 2 zero wearing and tearing Track butterfly valve, it is characterized in that: bottom (32) covers described adjusting screw rod (24) and is connected with described cover plate (27) by the 4th bolt and nut (29).

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