CN1121566C

CN1121566C - Valve device

Info

Publication number: CN1121566C
Application number: CN97125666A
Authority: CN
Inventors: 冈野正敏; 吉富昭三; 喜田义胜; 坪井直武; 那须利胜; 井本幸夫
Original assignee: Okano Valve Mfg Co Ltd
Current assignee: Okano Valve Mfg Co Ltd
Priority date: 1996-12-26
Filing date: 1997-12-25
Publication date: 2003-09-17
Anticipated expiration: 2017-12-25
Also published as: JP3242869B2; KR19980064034A; CN1190168A; KR100478094B1; JPH10238637A

Abstract

In a valve device, a disk bush to be integratedly connected to a boss part is arranged between a slide key provided in a rod and a boss part of a valve element. A washer is arranged around the disk bush, and the disk bush and the washer form a cylindrical assembly when they are closely fitted to each other. A bush having a notch in which the disk bush can be locally projected on a seat ring side is arranged around the washer. While the disk bush is projected from the notch, the valve element is moved straight. While the disk bush is retracted from the notch, the cylindrical assembly is turnably supported by the bush, and the valve element is turned together with the rod. The present invention is provides to keep the seal durability of a valve seat without any difficult work of excellent accuracy in machining the valve seat.

Description

Control valve unit

Technical field

The present invention relates to control valve unit, particularly, relate to a kind of its seal durability of making every effort to improve, the control valve unit of the improvement of the steering force when alleviating out valve as the butterfly valve.

Background technique

The butterfly valve in past generally uses rubber on valve seat, the flow passage that such butterfly valve is not suitable for high-temperature, high pressure fluid usually and is flow through.Therefore, under high-temperature and high-pressure conditions, in the used butterfly valve, adopted the valve seat made from metal.As butterfly valve with metal seat valve, known so-called oblique valve has been arranged, it has adopted metallic O ring as sealing material in valve seat part, and owing to make the central axis off-centre of the turning axle and the fluid passage of valve body, in the valve closing state, on the valve seat surface that tilts, add sealing load, to keep tightness.

Particularly in the occasion of the butterfly valve with metal seat valve, in order to ensure the sealing effect on the valve seat, valve body positively must be bearing on the assigned position of valve seat, therefore, the machining accuracy of valve body and valve seat must be done very highly.Specifically, on the valve seat that uses metallic O ring, when cut-off valve, the hermetic unit of valve body periphery must contact equably with the valve seat of metallic O ring, for this reason, must be careful the position relation of valve body and metallic O ring, and both must be made with highi degree of accuracy.

Also have, in the oblique butterfly valve, be totally enclosed place though should have only valve body and contacting of valve seat in design, in fact, because the mating part of the turning axle of above-mentioned valve body is lax, produce so-called gap, Once you begin open valve, valve body and valve seat must be wiped and close, also have, because turning axle off-centre, when cut-off valve, the imbalance that acts on the pressure on the valve body is also big.Because top situation, the moment that the butterfly valve of oblique is opened during from full cut-off is excessive, is difficult to valve is opened, and is not suitable for the sealing of high-pressure liquid especially.

Summary of the invention

Therefore, purpose of the present invention is for providing a kind of control valve unit, and it need not carry out the operation of difficulty with highi degree of accuracy in valve seat processing, and can simultaneously, can alleviate the steering force when opening valve keeping high seal durability through long-time back.

In order to achieve the above object, according to claim 1 of the present invention, this control valve unit has: the clack box that marks fluid passage in inside, be formed on the valve seat in this fluid passage, in order to interdict selectively and to open the aforesaid fluid path and can be located at valve body in the aforementioned clack box with respect to what aforementioned valve seat engaged and was supported with breaking away from, pass aforementioned clack box and enter the turning axle of this valve body of supporting of aforesaid fluid path, it is characterized by, for the aforementioned valve body that has engaged with aforementioned valve seat and the aforementioned valve seat that are located between aforementioned valve body and the aforementioned turning axle are broken away from, and for the aforementioned valve body that breaks away from aforementioned valve seat is engaged with aforementioned valve seat, it has motion changing mechanism, this mechanism is when rotating aforementioned turning axle, respond the revolution of the angular orientation in accordance with regulations of this turning axle, be the motion of straight line substantially what the rotation motion of this turning axle was transformed into aforementioned valve body.

In control valve unit as claimed in claim 1, when turning axle turned round in the angular range of regulation from full-shut position along valve opening position, motion changing mechanism was passed to valve body with the rotation motion of turning axle as the motion of basic straight line.Thus, in fact valve body and valve seat are not to slide, but press linearly operating basically.On the other hand, when turning round outside the angular range of turning axle in aforementioned regulation, motion changing mechanism is directly passed to valve body with the rotation motion of turning axle.The aforementioned movement shifting mechanism can be one, also can be a plurality of by being provided with at interval along the length direction of aforementioned turning axle.

The aforementioned movement shifting mechanism preferably is made of following part:

Be located at the cam gear on the aforementioned turning axle; The member that between aforementioned cam gear and aforementioned valve body, is provided with, be used for the motion of aforementioned cam gear is passed to transmitting movement aforementioned valve body, that have the camming surface that engages with aforementioned cam gear and that move integratedly with aforementioned valve body; Make substantially partly to surround the member straight line motion of this transmitting movement for the member that allows this transmitting movement and allow member for the motion of straight line; Be installed on the aforementioned clack box, support the member of aforementioned transmitting movement pivotally and allow to do aforementioned straight-line member, and form the motion-commutation component of the first outstanding dimple of member that the member make aforementioned transmitting movement can allow along the roughly axis direction of aforementioned valve seat from aforementioned straight line motion.

Also have, preferably, aforementioned cam gear is made of a pair of feather key that sets on the outer surface of aforementioned turning axle diametrically opposedly, the member of aforementioned transmitting movement is made of the cylindrical member that perimeter surface in it forms as aforementioned camming surface, aforementioned straight line motion allows that member is formed by the part cylindrical member, this part cylindrical member forms the inside that allows aforementioned cylindrical member to allow member with this straight line motion to side second dimple of outstanding size selectively, when aforementioned first and second dimple is pressed alignment, allow the member moving linearly of aforementioned transmitting movement.

Have again, the camming surface of aforementioned feather key is an arc surface, in order to make the aforementioned valve body that has engaged break away from aforementioned valve seat with aforementioned valve seat, and for the aforementioned valve body that has broken away from aforementioned valve seat is engaged with aforementioned valve seat, the aforementioned camming surface of the aforementioned cylindrical member that engages with aforementioned arc surface also is arc surface.But, at least a camming surface in the aforementioned a pair of feather key to be made the plane, if will also make the plane, then owing to be the face contact, so can rightly the rotation motion of valve rod be transformed into the straight line motion of valve body with the aforementioned camming surface of the aforementioned cylindrical member of this plane engagement.

Also have, aforementioned cam gear is except a pair of feather key, the center key that can also further contain the auxiliary aforementioned a pair of feather key on the external peripheral surface that is provided in turning axle, correspondingly, on the aforementioned inner peripheral surface of aforementioned cylindrical member, also can form the center key camming surface, this center key with camming surface when cartridge is non-extrusion position with respect to the 2nd dimple, with the travel direction side contacts of aforementioned middle key when opening valve events.

Also have, preferably the aforementioned movement shifting mechanism is made of following part: by on the outer surface of aforementioned turning axle, the cam gear that constitutes of diametrically opposed a pair of feather key that sets; The member of transmitting movement that between aforementioned cam gear and aforementioned valve body, set, that constitute by the cylindrical member that on interior perimeter surface, has the camming surface that engages with aforementioned cam gear for aforementioned valve body is passed in the motion of aforementioned cam gear, that move integratedly with aforementioned valve body; For the member that allows this transmitting movement do basic diametrically opposed for the motion of straight line, partly surround around the straight line motion of transmission of movement parts and allow member; Being installed in the member that supports aforesaid transmitting movement on the aforementioned clack box, pivotally and aforementioned straight line motion allows member and can allow that member is outstanding and diametrically opposed, partly make the member of the motion converter that surrounds along the roughly axial direction of aforementioned valve seat from aforementioned straight line motion for the member that makes aforementioned transmitting movement.In this occasion, first motion allows that the processing of member and motion-commutation component becomes easily, can look to reducing manufacture cost.

Aforementioned cam gear also can become one with aforementioned turning axle.

Description of drawings

Fig. 1 is the sectional elevation according to the control valve unit of the first embodiment of the present invention.

Fig. 2 is for illustrating the sectional view of the control valve unit of full-shut position along the x-x line of Fig. 1.

Fig. 3 illustrates out in the valve way for the x-x line along Fig. 1 or closes the sectional view of the control valve unit in the valve way.

Fig. 4 is for illustrating the sectional view of the control valve unit of full-gear along the x-x line of Fig. 1.

(a) of Fig. 5 illustrates first embodiment's of Fig. 1 valve rod, the dish type sleeve of control valve unit, the sectional view of packing ring and sleeve respectively to (d) with monomer.

(a) of Fig. 6 is the sectional view of the process that opens and closes for the difference that the motion changing mechanism of the control valve unit of the explanation first embodiment of the present invention illustrates control valve unit along the y-y line of Fig. 1 to (d).

Fig. 7 is the sectional view suitable with Fig. 6 (b) according to the control valve unit of the second embodiment of the present invention.

Fig. 8 is the sectional view suitable with Fig. 6 (b) according to the control valve unit of the third embodiment of the present invention.

(a) of Fig. 9 with (b) be that control valve unit and (a) Fig. 6 according to the 4th embodiment of the present invention reaches (b) suitable sectional view.

Figure 10 (a) is that stereogram, Figure 10 (b) of being formed with the sleeve of part protuberance are the stereograms that forms the valve body of recess in hub portion.

Figure 11 is the figure of the combination relation of sleeve shown in Figure 10 and valve body hub portion, (a) state of presentation graphs 6 (b), (b) state of presentation graphs 6 (d).

Embodiment

Describe most preferred embodiment of the present invention with reference to the accompanying drawings in detail, among the figure, prosign illustrates identical or corresponding part.In the following description, with regard to direction, right side with the paper of Fig. 1 is " front side ", the left side of paper is " rear side ", also have, in Fig. 1, the top of central axis 02 is that " upside ", below are " downside ", is " left side ", is " right side " with the back side of paper with the face side of the paper of Fig. 1.

Fig. 1 is the longitudinal sectional view of control valve unit that is in the present embodiment of full-shut position.Fig. 2 is the sectional view along the x-x line of Fig. 1, and Fig. 3 and Fig. 4 are for illustrating out the state in the valve way and the figure suitable with Fig. 2 of full-gear respectively.The control valve unit of present embodiment mainly is made of clack box 1, flange part 2, valve body 3, valve rod 4 and drive unit 20.

Clack box 1 is for to have the columnar member of being roughly of central axis 02, and fluid passage 1a is marked in its inside.Flowing shown in the arrow of R among Fig. 1 of fluid among the fluid passage 1a flows to rear side by the front side.Inner face at the clack box 1 that marks fluid passage 1a forms block 1b, and it can contact (referring to Fig. 2) with the block 3a that forms on valve body 3.In period about block 1b, 3a are in contact with one another, when the action of the described valve in explanation back, illustrate together.Parts shown in flange part 2 usefulness Fig. 2 are connected with the rear side of clack box 1.On flange part 2, the seat ring 2a with ring valve seat surface 12 is set integratedly.Above-mentioned central axis 02 is consistent with the axle center of valve seat surface 12.Also have, seat ring 2a also can be arranged with flange part in 2 minutes.

Valve body 3 is provided in the clack box 1 pivotally, on the circumferential surface of the rear side of this valve body 3, forms the valve seat surface 11 of frustum-like shape.Valve seat surface 11 as depicted in figs. 1 and 2, engages with aforementioned valve seat surface 12 when valve body 3 full cut-offs, blocking fluid passage 1a.Because valve seat surface 11 is made rigidity by metal etc., so can bring into play the suitable shape of its function with the maintenance of the valve seat method for repairing and mending in the general valve.Also have,

valve seat surface

11 and 12 also can be made the truncated cone shape same with common ball valve, particularly in the occasion of small diameter valve, if make the spherical valve seat surface, then more can bring into play high sealing effect.In the front part of valve body 3, as shown in Figure 1, form and mark the 1c of wall portion of the fluid passage 1a in the casing 1 close, with central axis O ₂For symmetry, each altogether hub portion 9 of two of one up and down.Valve body 3 is supported on the valve rod 4 (turning axle) by the dish type sleeve 10 (member of transmitting movement) that will describe in detail later at hub portion 9 places.

Valve rod 4 passes two hub portions 9 and extends along the vertical direction in Fig. 1, and is bearing on the clack box 1 by the sleeve (motion-commutation component) 6 that will describe in detail later on.The upper end of valve rod 4 is passed clack box 1 and is extended upward, is connected with that set as shown in the figure, common drive unit 20.On valve rod 4, on the circumferential surface of the part of surrounding, be formed with the keyway of prescribed level with hub portion 9.From Fig. 1 and Fig. 2 as can be seen, keyway separates roughly two positions of 180 ° and forms four altogether at two positions that separate along the stem shaft direction at circumferencial direction.In each keyway, chimeric have a feather key (cam gear) 5.Feather key 5 will contact with dish type sleeve 10 as will describing in detail later on.

The following describes motion changing mechanism.The motion changing mechanism of present embodiment is made of dish type sleeve (member of transmitting movement) 10, packing ring (straight line motion is allowed member) 7 and sleeve (motion-commutation component) 7.(a) of Fig. 5 illustrates the valve rod 4 of being with key, dish type sleeve 10, packing ring 7 and sleeve 6 with monomer respectively to (d).(a) of Fig. 6 is the sectional view that the open and-shut mode of valve is shown along the y-y line of Fig. 1 to (d).Dish type sleeve 10 is arranged between hub portion 9 and the valve rod 4, is fixed in the hub portion 9 integratedly with valve body 3 with moving.

The profile of dish type sleeve 10 by the radius of curvature that forms in front part be the curved surface S1 of D1/2, the radius of curvature that forms at rear section is D2/2 (the curved surface S2 of D2＞D1) and the planar S 3 that curved surface S1 and S2 couple together constituted.Also have, on dish type sleeve 10, be provided with the hole 13 that supplies valve rod 4 to pass of extending along axis direction, this hole 13 is divided into by camming surface or arc surface 10a～10g.These camming surfaces 10a～10g and cam projection (camming surface) 10h～10j concerted action, and as the action specification of back contact with feather key 5 on being entrenched in valve rod 4, make valve body 3 produce prescribed motion.Also have, no matter the shape of camming surface 10a～10g, cam projection 10h～10j will be designed in which angle, can not leave fully between feather key 5 and the dish type sleeve 10 when valve rod 4 revolutions.Like this, in the on-off action of control valve unit, can prevent the loosening of valve body 3.

In above-mentioned camming surface, camming surface 10b, 10d, 10f are the arc surfaces with essentially identical middle radius of curvature, camming surface 10a, 10c are respectively the circular arcs with bigger radius of curvature and smaller radius of curvature, and camming surface 10c, 10g are the planes that cam 10b and 10d are coupled together.Because each radius of curvature is poor, has cam projection 10h, 10i, 10j between each cam.

Being set to of packing ring 7 departed from the axis direction with respect to valve rod 4 on the position of valve body 3, partly surrounds the end of dish type sleeve 10.From Fig. 1 and Fig. 5 as can be seen, packing ring 7 is made of following part: be equipped with the hole of passing for valve rod 4 14, the plectane part 7a that its external diameter is D2 substantially in the centre; Substantially vertically extend along valve rod axis from this plectane part 7a, external diameter is that D2, internal diameter are the part annulus part 7b of D1 substantially substantially.The rear section of part annulus part 7B cuts the part suitable with the curved surface S2 of dish type sleeve 10, forms dimple 7c, also has, and the interior perimeter surface of part annulus 7b has curved surface S1 and planar S 3 corresponding shape with dish type sleeve 10.Therefore, when packing ring 7 and disk sleeve 10 were chimeric, the interior perimeter surface of part annulus part 7b contacted with the curved surface S1 and the planar S 3 of dish type sleeve 10, and as being understood by Fig. 1, the formation external diameter is the tubular assembly of D2.

Sleeve 6 is main as (d) by Fig. 1 and Fig. 5 found out to be made of following part: the cylindrical portions may 6a that diameter is relatively less, and it is fixed between clack box 1 and the valve rod 4, has the hole of passing for valve rod 4 15; Its internal diameter is roughly the part cylindrical portions may 6b of D2 between clack box 1 and packing ring 7.And this part cylindrical portions may 6b is adapted to and surrounds packing ring 7, by the chimeric above-mentioned tubular assembly that forms of this packing ring 7 and dish type sleeve 10 in part cylindrical portions may 6b by free rotaring ground supporting (referring to Fig. 6).

At the rear section of part cylindrical portions may 6b, form dimple 6c by arc with chord length H.The chord length H of dimple 6c preferably is substantially equal to the planar S 3 of dish type sleeve 10, the distance (referring to Fig. 5) between the S3.

The following describes the action of the control valve unit of present embodiment.In Fig. 2, the control valve unit when showing full cut-off.In (a) of Fig. 6, the feather key 5 when showing full cut-off and the relation of motion changing mechanism.When full cut-off, shown in Fig. 6 (a), among feather key 5, the feather key 5b of rear side contacts with cam projection 10i, and to pusher, the feather key 5a of front side then contacts with camming surface 10a with push-plate shape sleeve 10.Therefore, the rear side ora terminalis of the planar S 3 of dish type sleeve 10 stretches out Lmm along central axis 02 in the dimple 6c of sleeve 6, therefore, the interior perimeter surface of the curved surface S1 of dish type sleeve 10 and part annulus part 7b breaks away from, and produces gap 16 at curved surface S1 and in being somebody's turn to do between the perimeter surface.Also have, on the leading flank of valve body 3, with respect to flow direction R, the pressure P 1 (Fig. 1) of the upstream side fluid of valve body 3 is towards the directive effect of seat ring 2a.By this pressure P 1, the valve seat surface 11 of valve body 3 is pressed on the seat ring 2a, and the flowing of fluid passage 1a of valve body 3 crossed in blocking.Have, at this moment, the block 3a of aforementioned valve body 3 block 16 with clack box 1 leaves Lmm (referring to Fig. 2) again.

The following describes the action that valve body 3 is opened from above-mentioned full-shut position.In order to open valve body 3 during action driver 20, valve rod 4 is along the on every side revolution of the direction shown in the arrow Q of Fig. 2 and Fig. 6 (a) around vertical axle center 01 of valve rod 4, along with this revolution, the feather key 5 that is contained on the valve rod 4 also turns round along the direction of arrow Q.At this moment, because the distance camming surface decrescence in perimeter surface formation vertical axle center 01 of distance from arc surface 10a to projection 10h in the dish type sleeve, so the feather key 5a of front side one side pushes away dish type sleeve 10 forward, one side is turned round.Therefore, dish type sleeve 10 along central axis 02 in dimple 6c, protruding seat 7c and part annulus part 7b inside forward side direction slide.But as long as the planar S 3 of dish type sleeve 10 is outstanding to the inside of dimple 6c, even dish type sleeve 10 will turn round, because its planar S 3 tangles the end face 6d of the part cylindrical portions may 6b that marks dimple 6c, so dish type sleeve 10 can not be followed revolution owing to the revolution of valve rod 4 and feather key 5.

When dish type sleeve 10 when side is slided forward as previously mentioned, also be parallel to central axis 02 side shifting forward with the valve body 3 that this dish type sleeve 10 combines integratedly.Thus, make the valve seat surface 11 of valve body 3 leave the valve seat surface 12 of seat ring 2a and the pressure P 1 that acts on the leading flank of valve body 3 discharges at the rear side of valve body 3.

As mentioned above, in the present embodiment, when valve rod 4 when full-shut position is turned round about 20 °, the revolution of valve body 3 is prevented from, the rotation motion passive movement shifting mechanism of valve rod 4 is transformed into translational motion and passes to valve body 3, and valve body 3 is positively forwards moved.Also have, this angle is not a critical value, but can change according to the shape of camming surface, feather key etc., can be more than 20 ° or the various values below 20 °.Also have, the straight line motion of valve body also can change to circular-arc according to the shape of camming surface, feather key etc. from straight line shape, still, because move distance (Lmm) is very little, in fact can think straight line shape.Also have, particularly when valve is opened, open this valve body, so preferably make above-mentioned move distance to a certain degree little owing to overcoming the hydrodynamic pressure that acts on the valve body, so that by the motion changing mechanism power big, and can design the shape of camming surface, feather key etc. by this to the valve body effect.

The moving to turn round along the direction of arrow Q between about 20 ° with full-shut position and continue forwards of dish type sleeve 10 recited above and valve body 3 at valve rod 4.Just, when about 20 ° of valve rod 4 revolution, valve body 3 is from the state of Fig. 2 side shifting Lmm forward, and as shown in Figure 3, the block 3a of valve body 3 contacts with the block 1b of clack box 1.Simultaneously, dish type sleeve 10 is from the state of Fig. 6 (a) side shifting Lmm forward, and shown in Fig. 6 (b), the curved surface S1 of dish type sleeve 10 contacts with the interior perimeter surface of part annulus part 7b.Thus, because 3 of the planar S of dish type sleeve 10 side shifting Lmm forward, than the end face 6d retraction more to the inside that marks dimple 6c, therefore, with the bond-off of dimple 6c.Also have, in the inside of sleeve 6, dish type sleeve 10 is tightly chimeric with packing ring 7, and on both boundary lines in dimple, it is the tubular assembly of D2 that formation does not have concavo-convex diameter.Have, for feather key 5, the feather key 5a of front side is in the state that tangles projection 10h again, and the feather key 5b of rear side then is in the state (referring to (b) of Fig. 6) in the tight embedding camming surface 10e.

Be at the each several part of control valve unit after the state shown in (b) of Fig. 3 and Fig. 6, when valve rod 4 during further along the direction revolution of arrow Q, the turning power of valve rod 4 is intactly passed to dish type sleeve 10 as rotating force by feather key 5.Just, as top, because the feather key 5a of front side tangles projection 10h, planar S 3 is thrown off with dimple 6c, so the tubular assembly that is made of dish type sleeve 10 and packing ring 7 turns round (referring to (c) of Fig. 6) with valve rod 4 in sleeve 6, with dish type sleeve 10 connect integratedly valve body 3 also with valve rod 4 revolution, finally become the full-gear shown in (d) of Fig. 4 and Fig. 6.

In the present embodiment, valve rod 4 is turning round after about 20 ° from full-shut position as top, because valve body 3 can not move point-blank along central axis 02, the turning power of valve rod is then in statu quo passed to valve body 3 by motion changing mechanism as turning power, so valve body 3 positively turns round along valve opening position.

The following describes valve body 3 carries out closing motion from full-gear situation.When valve rod 4 turns round along the direction opposite with arrow Q with the state shown in Fig. 4 and Fig. 6 (d), the feather key 5b that is entrenched in the rear side among the camming surface 10e tangles projection 10d, and the tubular assembly court in sleeve 6 that is made of dish type sleeve 10 and packing ring 7 turns round with the identical direction of valve rod 4.Thus, the valve body 3 that links into an integrated entity with dish type sleeve 10 is also towards direction (the close valve direction) revolution identical with valve rod 4.When motion changing mechanism is in the state of (b) through the state of Fig. 6 (c), the angular orientation unanimity of the dimple 6c of angular orientation 5 sleeves 6 of the dimple 7c of packing ring 7 then, both come into line by straight line, simultaneously, being located at block 3a on the valve body 3 will be as shown in Figure 3 contact with the block 1b of a side of clack box, when valve rod 4 further turns round towards the direction opposite with arrow Q, because the rotation of valve body 3 is by block 1b, 3a stops, thus the dish type sleeve 10 that projection 10i is pushed by the feather key 5b of rear side along central hub 02 at dimple 6c, move backward in dimple 7c and the part annulus part 7b.Therefore, the valve body 3 that is connected with dish type sleeve 10 also is parallel to central hub 02 ground side shifting backward.When valve body 3 from the state of Fig. 3 rearward during mobile Lmm, valve seat surface 11 seals tightly with valve seat surface 12 and combines, control valve unit becomes full-shut position.

In the control valve unit of illustrated in the above present embodiment, in the occasion of carrying out opening action with full-shut position, because central shaft 02 ground that valve body 3 is parallel to valve seat surface 12 leaves from seat ring 2a, in fact can not produce the slip between the

valve seat surface

11,12 of valve body 3 and seat ring 2a.Therefore, can reduce the wearing and tearing of

valve seat surface

11,12, through still keeping good seal durability for a long time, simultaneously, owing to reduced the surface friction drag that produces by sliding, the steering force of valve body can be very little.

When cut-off valve, because the central axis 02 that valve body 3 is parallel to valve seat surface 12 moves and connect life with seat ring 2a, with the hydrodynamic pressure sealing, so can obtain very high sealing effect.

Because valve body moves as mentioned above substantially parallel, so valve seat surface does not need to carry out can keep bringing into play the appropriate shape of sealing function owing to adopting valve seat method for repairing and mending commonly used in the general valve to need high-precision difficult operation.

Above although understand the preferred embodiments of the present invention, still, the present invention is not limited to this embodiment, but can carry out various changes, for example, can change shown in Fig. 7 and Fig. 8 [with (b) suitable figure of Fig. 6 of previous embodiment] and implements.

Tediously long for fear of explanation, the main only explanation part different with previous embodiment.In the variant embodiment of Fig. 7, be located at valve rod 4 ' on feather key in the shape of camming surface b1 of Lower Half of feather key 5b ' of rear side can be with aforesaid identical, for circular-arc, but at the recessed wheel face b2 of the first half seen in Figure 7 then is the plane b2 of straight line shape basically, therefore, therewith the dish type sleeve 10 that engages of plane b2 ' the camming surface 10I plane of also making direct shape substantially.Also have, the feather key 5a ' of the opposing party's front side is made of the clinoplain of straight line shape at the camming surface a2 of the first half seen in Figure 7.Though the camming surface a1 of Lower Half removes beyond the true dip direction, also constitute by same straight line shape plane substantially, not necessarily must this, also can make circular-arc.Dish type sleeve 10 ' camming surface 10A and 10H have and the shape of such feather key 5a ' and the corresponding shape of moving, camming surface 10H then is a plane inclined.

Therefore, in this variant embodiment, when making valve rod 4 ' in the angular range of regulation along positive and negative direction revolution, when opening and closing valve body, no matter in which occasion, because feather key contacts with the clinoplain of straight line shape on the one hand with the dish type sleeve, on the one hand valve body is moved by straight line shape, the turning power of valve rod positively passes on the valve body, so the reliability of action improves, and is particularly suitable for using in major valve.

In the variant embodiment of Fig. 8, though the camming surface of feather key 5a ', 5b ' and dish type sleeve 10 ' shape and Fig. 7 identical of camming surface, sleeve 6 ' and packing ring 7 ' the shape difference.That is to say, owing to the part that on these members, must make for having above-mentioned dimple, the part that the revolution along with valve rod of dish type sleeve turns round and slide that leads simultaneously, so as the embodiment of Fig. 1～Fig. 7, section needn't form the U font, but can make as shown in the figure from clamp up and down dish type sleeve 10 ' structure.At this moment, sleeve 6 ' with gas ket 7 ' processing become simply, can reduce manufacture cost.

Also have, the present invention also can for example change shown in Fig. 9 (reaching (b) suitable figure with Fig. 6 (a)) and implement.

For the embodiment of this change, tediously long for fear of explanation, main only explanation and earlier figures 1 are to different part embodiment illustrated in fig. 6.In the embodiment of the change of Fig. 9, on the outer surface of valve rod 4, on the position at right angle, be provided with middle key 17 with respect to the feather key 5a of front side and the feather key 5b of rear side respectively.The camming surface of this middle key 17 forms circular-arc.First aspect between the camming surface 10a and camming surface 10f of dish type sleeve 10, forms camming surface 10K, 10m, 10n.Camming surface 10m is the essentially identical arc surface of curvature of the front half part side (the direction of advance side when opening valve events) of the circular-arc camming surface of curvature and middle key 17, when the state shown in Fig. 9 (b) promptly when the vertical axle center 01 that with respect to dimple 7c is the valve rod 4 of non-extrusion position is in the position that overlaps with the centre of curvature 03 of curved surface S1, the S3 of dish type sleeve 10, the camming surface 10m of dish type sleeve 10 forms whole contacting with the front half part side of the camming surface of middle key 17.Camming surface 10n is for connecting the curved surface of camming surface 10m and camming surface 10f, and its ratio of curvature camming surface 10m's is big, and it does not contact with middle key 17.Form the motion space of middle key 17 by this camming surface 10n.Camming surface 10K is for connecting camming surface 10a and camming surface 10m plane.Also have,, between camming surface 10K and camming surface 10m, have cam projection 10p because radius of curvature etc. is poor.

Begin out valve events during from the full cut-off shown in Fig. 9 (a), make valve rod 4 when the Q direction is turned round, the feather key 5a of front side is the sleeve of thruster dish type forward 10 on the one hand, the one side revolution, and dish type sleeve 10 advances along central axis 02 in packing ring 7.When dish type sleeve 10 advanced Lmm during with full cut-off, then shown in Fig. 9 (b), 03 was in the state that overlaps in the curvature of vertical axle center 01 of valve rod 4 and curved surface S1, the S2 of dish type sleeve 10.At this moment, middle key 17 does not contact with camming surface 10m and is arcuation and moves, and in the state shown in (b) of Fig. 9, the front half part side of middle key 17 engages with camming surface 10m.But, the wearing and tearing of the part that produces owing to the action of hundreds of thousands time or because implementer's machining accuracy during fabrication is not enough, between the camming surface of the feather key 5b of the feather key 5a of front side or rear side and dish type sleeve 10, produce the occasion in very little gap, in above-mentioned action, middle key 17 contacted with camming surface 10m or cam projection 10p move end of a period to the position shown in Fig. 9 (b) before, and in statu quo continue push-plate shape sleeve 10 forwards, the state that can cause vertical axle center 01 to overlap with centre of curvature 03.That is to say, in the present embodiment, except the feather key 5b of the feather key 5a of front side and rear side, owing to be provided with the middle key 17 of auxiliary these feather keys 5a, 5b work, so make in vertical axle center 01 and the curvature 03 to overlap more effectively.

Also have, for middle key 17, do not contact with camming surface 10n owing to as above said, therefore, compare with the feather key 5b of rear side with the feather key 5a of the front side that often contacts with the camming surface of dish type sleeve 10, abrasive conditions is good.Have again, middle key 17 shown in Fig. 9 (b) with after camming surface engages, at valve rod 4 further along the rotating occasion (not shown) of Q direction, because middle key 17 plays a part the turning power of valve rod 4 is passed to dish type sleeve 10, therefore, the burden that is added in the turning power on the feather key 5b of the feather key 5a of front side and rear side is alleviated.

Also have, as other change scheme, also can be from first to form the part (figure do not show) suitable with dish type sleeve 10 with hub portion 9.That is to say, that dish type sleeve 10 is additional as other member, but at the inner face in the hole of running through valve rod 4 of the hub portion 9 of valve body 3, directly form and play and above-mentioned camming surface, the projection 10a～camming surface of 10j same purpose, projection.

Also have, working as valve especially is the occasion of large-diameter valve, keyway and chimeric feather key can be set on valve rod 4, but the tabular cam with projection suitable with feather key 5 is set on valve rod 4, form the projection suitable at valve rod from one's body, feather key and valve rod are made the part that becomes one with feather key.Have again, though go up from the stable of supporting valve body, hub portion 9 best along valve rod vertically be provided with two,, also can have only one, also can be other number.

In the various embodiments described above, all be to form the block 1b of the on-off action of limiting valve body 3 at the inner face of clack box 1, but also this block can be set, and as illustrated in fig. 10, on sleeve b, form part protuberance 6e, in the hub portion 9 of valve body 3, form recess 9a with this part protuberance 6e combination.Part protuberance 6e end face from axis direction in the part cylindrical part 6b of sleeve 6 stretches out, and recess 9a is formed on the axis direction end face of hub portion 9.According to this structure, shown in Figure 11 (a), protruding 6e of part and recess 9a combine, the end face 9b of recess 9a engages with part protuberance 6e both ends of the surface 6g, play the effect of closing valve retainer that regulation valve body 3 closes the rotation of valve direction, and, shown in Figure 11 (b), the end face 9c of recess 9a engages with the end face 6f of part protuberance 6e, plays the effect of the standard-sized sheet block of regulation valve body 3 fully open positions.

From the above mentioned, according to control valve unit of the present invention, because essentially no slip between valve seat surface, so can prevent the wearing and tearing of valve seat, simultaneously, the frictional resistance when not needing in the past the sort of because opposing to slide makes the steering force under the situation that valve body moves, and it is very light that the opening and closing operations of valve body becomes.

Also have, the camming surface of the feather key in the cam gear and transmission of movement member are that the camming surface of dish type sleeve is that face contacts, so can improve the reliability of the on-off action of valve body.

Have again, because the middle key of auxiliary feather key is set on cam gear, so increased the reliability of the on-off action of valve body.

Claims

1. control valve unit, it has: the clack box (1) that marks fluid passage (1a) in inside; Be formed on the valve seat (2a) on this fluid passage (1a); In order to interdict selectively and to open aforesaid fluid path (1a) and can be located at the interior valve body (3) of aforementioned clack box (1) with respect to what aforementioned valve seat (2a) engaged and was supported with breaking away from; Pass aforementioned clack box (1) and enter the turning axle (4) of this valve body of supporting (3) of aforesaid fluid path (1a), it is characterized by, for the aforementioned valve body (3) that has engaged with aforementioned valve seat (2a) that is located between aforementioned valve body (3) and the aforementioned turning axle (4) is broken away from aforementioned valve seat (2a), and for the aforementioned valve body (3) that breaks away from aforementioned valve seat (2a) is engaged with aforementioned valve seat (2a), it has motion changing mechanism, when this mechanism turns round at aforementioned turning axle (4), respond the revolution of the angular orientation in accordance with regulations of this turning axle (4), the rotation motion of this turning axle (4) is transformed into the basic of aforementioned valve body (3) is the motion of straight line, the aforementioned movement shifting mechanism is made of following part: be located at the cam gear (5) on the aforementioned turning axle (4); The member (10) that between aforementioned cam gear (5) and aforementioned valve body (3), is provided with, be used for the motion of aforementioned cam gear (5) is passed to transmitting movement aforementioned valve body (3), that have the camming surface that engages with aforementioned cam gear and that move integratedly with aforementioned valve body (3); Partly surround the straight line motion of the member (10) of this transmitting movement for the member (10) that allows this transmitting movement is essentially the motion of straight line and allow member (7); Being installed in aforementioned clack box (1) goes up, supports pivotally the member (10) of aforementioned transmitting movement and straight line motion and allow member (7), and form the member (10) that makes aforementioned transmitting movement can be allowed first dimple (6c) that member (7) is given prominence to along the roughly axis direction of aforementioned valve seat (2a) from aforementioned straight line motion motion-commutation component (6).

2. a control valve unit as claimed in claim 1 is characterized in that, the aforementioned movement shifting mechanism is provided with a plurality of along the length direction of aforementioned turning axle (4) spaced-apartly.

3. control valve unit as claimed in claim 1, it is characterized in that, aforementioned cam gear (5) is by a pair of feather key (5a that sets on the outer surface of aforementioned turning axle (4) diametrically opposedly, 5b) constitute, the member of aforementioned transmitting movement (10) is made of the cylindrical member that interior perimeter surface forms as aforementioned camming surface, aforementioned straight line motion allows that member (7) is formed by the part cylindrical member, this part cylindrical member forms and allows aforementioned cylindrical member allows member (7) from this straight line motion inside to side second dimple (7c) of outstanding size selectively, as aforementioned first and second dimple (6c, during 7c) by alignment, allow member (10) moving linearly of aforementioned transmitting movement.

4. control valve unit as claimed in claim 2, it is characterized in that, aforementioned cam gear (5) is by a pair of feather key (5a that sets on the outer surface of aforementioned turning axle (4) diametrically opposedly, 5b) constitute, the member of aforementioned transmitting movement (10) is made of the cylindrical member that interior perimeter surface forms as aforementioned camming surface, aforementioned straight line motion allows that member (7) is formed by the part cylindrical member, this part cylindrical member forms and allows aforementioned cylindrical member allows member (7) from this straight line motion inside to side second dimple (7c) of outstanding size selectively, as aforementioned first and second dimple (6c, during 7c) by alignment, allow member (10) moving linearly of aforementioned transmitting movement.

5. control valve unit as claimed in claim 3, it is characterized in that, in the aforementioned cam gear (5), except aforementioned a pair of feather key (5a, 5b), also contain the middle key (17) of auxiliary this a pair of feather key (5a, 5b) on the outer surface that is provided in aforementioned turning axle (4).

6. control valve unit as claimed in claim 5, it is characterized in that, in aforementioned cylindrical member aforementioned on the perimeter surface, form the camming surface that middle key is used, at cartridge with respect to second dimple (7c) when being positioned at non-extrusion position, above-mentioned cam and the travel direction side contacts of aforementioned middle key (17) when opening valve events.

7. any one control valve unit as claim 3～6, it is characterized in that, the camming surface of aforementioned feather key (5a, 5b) is an arc surface, for the aforementioned valve body (3) that has engaged with aforementioned valve seat (2a) is broken away from aforementioned valve seat (2a), and for the aforementioned valve body (3) that breaks away from aforementioned valve seat (2a) is engaged with aforementioned valve seat (2a), the aforementioned camming surface of the aforementioned cylindrical member that engages with aforementioned arc surface also is an arc surface.

8. any one control valve unit as claim 3～6, it is characterized in that, at least one camming surface in the aforementioned a pair of feather key (5a, 5b) comprises the plane, for the aforementioned valve body (3) that has engaged with aforementioned valve seat (2a) is broken away from aforementioned valve seat (2a), and/or for the aforementioned valve body (3) that breaks away from aforementioned valve seat (2a) is engaged with aforementioned valve seat (2a), with the aforementioned camming surface of the aforementioned cylindrical member of aforementioned plane engagement also be the plane.

9. control valve unit as claim 1 or 2, it is characterized in that the aforementioned movement shifting mechanism is made of following part: by the cam gear (5) of a pair of feather key that on the outer surface of aforementioned turning axle (4), sets (5a, 5b) formation diametrically opposedly; The member (10) of transmitting movement that set between aforementioned cam gear (5) and aforementioned valve body (3) for aforementioned valve body (3) is passed in the motion of aforementioned cam gear (5), that constitute by the cylindrical member that on interior perimeter surface, has the camming surface that engages with aforementioned cam gear (5), that move integratedly with aforementioned valve body (3); Make substantially to surround the straight line motion of this transmission of movement member (10) for the member (10) that allows this transmitting movement and allow member for the diametrically opposed ground of the motion of straight line part; Be installed on the aforementioned clack box (1), support the member (10) of aforementioned transmitting movement and aforementioned straight line motion pivotally and allow member (7) and can allow member (7) motion-commutation component (6) outstanding and diametrically opposed, that partly surround from aforementioned straight line motion along the roughly axis direction of aforementioned valve seat (2a) for the member (10) that makes aforementioned transmitting movement.

10. any one control valve unit as claim 1～9, its aforementioned cam gear (5) is by partly constituting with aforementioned turning axle (4) all-in-one-piece.