US3776505A

US3776505A - Valve

Info

Publication number: US3776505A
Application number: US00297992A
Authority: US
Inventors: S Nakanishi
Original assignee: Kobe Steel Ltd
Current assignee: Kobe Steel Ltd
Priority date: 1971-09-30
Filing date: 1972-10-02
Publication date: 1973-12-04
Anticipated expiration: 1990-12-04
Also published as: JPS4841324A; DE2247789A1; GB1402004A; JPS5036689B2; DE2247789B2

Abstract

A valve comprising a valve plate for closing a through fluid passageway which is first retracted from the valve seat and then rotated in order to open, a valve rod having an eccentric portion rotatably supporting the valve plate, a retraction guide pin for the valve plate engaging with the body of the valve to guide the valve plate during its retraction upon rotating the valve rod through a first portion, and a rotation guide pin to lock the valve plate with the valve rod only during a second portion of rotation of the valve rod for movement therewith.

Description

Nakanishi 51 Dec. 4, 1973 VALVE [75] Inventor: Sadayuki Nakanishi, Kobe, Japan [73] Assignee: Kobe Steel, Ltd., Kobe, Japan 22 Filed: Oct. 2, 1972 21 Appl. No.: 297,992

3,033,513 5/1962 Vullicz 251/163 Primary Examiner-Martin P. Schwadron Assistant ExaminerDavid R. Matthews Attorney-Norman F. Oblon et a1.

[57] ABSTRACT A valve comprising a valve plate for closing a through Foreign Application Priority Data fluid passageway which is first retracted from the Sept. 30, 1971 Japan 46/77224 valve seat and then rotated in order to p a valve rod having an eccentric portion rotatably supporting [52] us. Cl. 251/163, 251/215 the valve p a retraction g i p n f r h alve [51] Int. Cl. F16k 5/14 pl ngaging with the bo y of the valve to guide the [58] Field of Search 251/56, 157, 162, valve p ate during its retraction upon rotating the 251/163, 192, 203, 204, 213, 215 valve rod through a first portion, and a rotation guide pin to lock the valve plate with the valve rod only dur- [56] References Cited ing a second portion of rotation of the valve rod for UNITED STATES PATENTS movement therewith- 2,9l9,885 1/1960 Daigle 251/163 X 6 Claims, 13 Drawlng' Figures Y r \N i QQQQ PATENTEUOEB M913 3.776.505

' SHEET 3 [If 5 VALVE BACKGROUND OF THE INVENTION 1. Field Of The Invention:

The present invention relates generally to a valve, and more particularly to a valve including a valve body forming a fluid passageway therethrough, an annular valve seat coaxial with the axis of the fluid passageway, a valve rod rotatably disposed on the valve body being oriented perpendicular to the axis of the valve seat and adapted to operate from outside the valve body, and a valve plate adapted to engage the valve seat and thereby open and close the fluid passageway in response to operation of the valve rod.

2. Description Of The Prior Art:

Conventional valves having metallic engaging surfaces are widely utilized for opening and closing fluid passageways. However, such conventional type valves as angle valves and ball valves are generally heavy in weight, high in manufacturing cost, and large in operating power. Conventional throttle type valves are apt to leak while in their fully closed positions and thus necessi'tate non-metallic surface means to stop the leak. Further, throttle valves having metallic engaging surfaces are generally complex in construction and operation.

In one known proposed valve of the aforementioned kind, in the valve opening process, the valve plate is first retracted from the valve seat and then rotated through 90 without disturbing the valve seat. 'However, such known valves are complex in construction and lack reliability in operation, so that they cannot be widely used.

SUMMARY OF THE INVENTION It is the primary object of the present invention to provide an improved valve having the last mentioned operating principleand yet being of simple andrugged construction and more reliablein operation.

The foregoing object and othersare attained, according to the present invention, through the provision of a valverod which is provided with an integral eccentric portion to rotatably support the valve plate. A first guide pin actingas a retraction guide pin and a second guide ,pin acting as a rotation guide pin are disposed on the valve platefThe first guide pin cooperates with a first groove formed in the valve body at a first portion of the rotation of the valve rod to retract the valve plate from the valve seat as the eccentric portion revolves about the axial center of the valve rod. The second guide pin cooperates with a recess meansof the valve rod only at a second portion of the rotation of the valve rod tol'ock the valve plate with the valverod so that it will rotate'therewith."Consequently, in the valve opening operation, the valve plate first :is 'retracted from the valve seat to clear a rotation path and then is rotated with the valve 'ro'dto a fully open position.

To engage the second guide pin with the recess means, a-second'guide'groove may be' providedto allow projection of-the second guide ":pin only at the second portion ofthe rotation of'the valve-rod.

The construction is very simple andrelative sliding parts are few, so that the valve, according to'theinvention, is easy to'm'anu'facture and has along operational life.

'BRIEF DESCRIPTION OF THE DRAWINGS Various other objects, featuresand attendantiadvantages of the present invention will be more fully appreciated as the same becomes better understood from the following detailed description when considered in connection with the accompanying drawings, in which like reference characters designate like or corresponding parts, and wherein:

FIG. 1 diagrammatically shows a longitudinal sectional view of one embodiment of the valve according to the present invention;

FIG. 2 diagrammatically shows a plan view, a portion thereof being broken away, of the moving part of the valve shown in FIG. 1;

FIG. 3 is similar to FIG. 2, illustrating the open position of the valve;

FIG. 4 is a diagrammatic illustration of the open position of the valve;

FIG. 5 to FIG. 7 show relative positions of the valve elements on an enlarged scale, in which FIG. 5 shows the valve in its closed position, FIG. 6 shows the valve in its parallel retracted position, and FIG. 7 shows the valve in its open position;

FIG. 8 to FIG. 10 show three relative positions of the pins and the corresponding guide grooves on an enlarged scale, generally corresponding to FIGS. 5 to 7;

FIG. 11 is generally similar to FIG. 8, showing an alternative form of the engaging pin;

FIG. 12 is generally similar to FIG. 2, showing another embodiment to urge the valve plate; and,

FIG. 13 shows a diagrammatical sectional view of an other embodiment of the guide pin shown in FIG. 1.

DETAILED DESCRIPTION OF THE ILLUSTRATED EMBODIMENTS Referring now to the drawing, and more particularly to FIG. 1 thereof, a valve, according to the present invention is shown in its closed position. The valve provides a valve body '1 having a fluid passageway 1' axially .formed therethrough and being adapted for insertion into a fluid pipe line, not shown, by suitable retaining means, such as bolts, also not shown. The valve body '1 forms a valve chamber to receive a valve plate 3, a valve plate actuating assembly, which will be described more fully hereinafter, and a valve seat 18 to be engaged by the valve plate 3 in its closed position. The valve seat 18 is shown as being a portion of the valve body 1,but it should be understood that the valve seat '18 can be separately formed as an annular ring which may be secured with the valve body 1 in known manner, such as by press fitting therein.

An elongate valve rod 2 is rotatably inserted in the valve chamber transversely extending across the'fluid passageway '1 The top end of the valve rod '2 is formed to receive a valve operating member, not shown, such as, for example, a lever, a handle or other suitable mechanism, 'to rotate the valve rod 2 between the closed and opened positions thereof.

The valve chamber isclosed '

bycovers

22 and 23 which also ,guide the valve rod .2 by suitable bearing means disposed therein not shown. A portion-of the tionalgguide pin-9 to rotate theretractedvalve plate 3 to a fully open position. The retraction guide pin 10 is secured within the mounting block 4 and projects radially outwards from the outer surface thereof. The rotation guide pin 9 is slidably engaged in hole 14 and is urged outwardly by a spring 11 which engages the bottom surface of pin 9. In FIG. 1, the

guide pins

9 and 10 are shown as being arranged at one side of the rod 2 for convenience of illustration, however, the

guide pins

9 and 10 are preferably arranged diametrically opposite of the center of the eccentric portion 2' of the valve rod 2 and parallel to the valve plate 3, as shown more clearly in FIGS. 2 and 5 to 7. As the upper and lower mechanisms are similar to each other, only the upper mechanism is described fully herein.

The fixed ring 6 encircling the valve rod 2 is secured to the valve body 1 by one or more pins 12. The fixed ring 6 has a guide groove 17 formed on its inner surface for engaging the projected portion of the retraction guide pin and a guide groove 16 to receive the projection of the rotation guide pin 9. As to the guide grooves 16 and 17, detailed description will be given hereinafter, referring to FIGS. 5 to 7.

An annular moving ring 7 is disposed in a cylindrical recess of the fixed ring 6 and is secured to the valve rod 2 by one or more pins 13. The inner surfaces of the rings 6 and 7 engage the outer surface of the mouunting block 4. The moving ring 7 has a through opening disposed at a radius r from the center 0 of the valve rod 2 and diametrically opposite to the center 0 of the eccentric portion 2' or just as the position shown in FIG. 1. The opening 15 slidably accommodates an engaging pin 8, the top surface of which is engaged by the guide groove 16 and the bottom surface of which is engaged by the rotation guide pin 9. The length of the engaging pin 8 corresponds to the thickness of the moving ring 7. The relative positions of the engaging pin 8, guide pin 9 and the guide groove 16 are arranged such that, in the closed position of the valve plate 3, no relative engagement is present, as shown in FIG. 5, and after the rod 2 is rotated through 90 and the valve plate 3 is retracted, the engaging pin 8, guide pin 9 and the guide groove 16 are aligned as shown in FIG. 6, and the guide pin 9 is thus projected into the hole 15 by the spring 11 to guide the valve plate 3 so that it rotates to the open position. In the engaging and disengaging position of the pin 8 and the groove 16, the groove 16 is tapered to decrease the depth of the groove, to guide the head of the engaging pin 8, as shown in FIG. 9.

FIG. 5 shows the relative positions of the

pins

8, 9 and 10 and the

grooves

16 and 17 in the closed position of the valve. From the center 0 of the valve rod 2, the YY axis is parallel to the center axis of the valve opening 1' and the X-X axis is perpendicular to the YY axis and parallel to the surface of the valve seat 18. In the closed position, center 0 of the eccentric portion 2' of the rod 2 aligns with the YY axis at a distance I from the center 0.

rant of the X-Y axis as a 90 arcuate groove having a center radius r about center 0. The center of the hole 7 15 and the engaging pin 8 are spaced the same distance r from the center 0. The guide pin 9 is arranged at a distance s from the center 0' and parallel with the X- axis, and the distance s r I, so that when the center 0' is on the X-axis, the guide pin 9 aligns with the groove 16.

The guide pin 10 is arranged at a distance T from the center 0' at opposite side of the pin 9. The guide groove 17 consists of two different curves, the first of which starts from the closed position of the pin 10, that is at the distance T along the X-axis and the distance I along the Y-axis and the radius of the curve is I, having its center at the X axis at the distance T from the center 0. The end of the first curve aligns with the X-axis, and is connected with the second curve of a radius T I having a center 0. The second curve extends about Thus the guide groove 17 guides the guide pin 10 along a full operating position of the valve.

The operation of the valve is as follows: FIG. 1 and the solid line of FIG. 2 show the closed position of the valve plate 3 which engages the valve seat 18 to shut off the fluid passageway 1. By rotating the valve rod 2 by suitable means, such as a lever, the valve plate 3 retracts from the valve seat for some distance, as shown by a dot-and-dash line in FIG. 2 and FIG. 6, and upon further rotation of the valve rod 2, the valve plate 3 rotates 90 to its fully open position, as shown in FIG. 3 and FIG. 7. Relative positions of the

pins

8, 9 and 10 and

grooves

16 and 17 are shown in FIGS. 5 and 8 in the valve closed position, FIGS. 6 and 9 in its retracted position, and FIGS. 7 and 10 in its fully open position.

From the closed position shown in FIGS. 2 and 5, the valve rod 2 is rotated clockwise to open the valve. The eccentric portion 2' of the valve rod 2 rotates about the center 0 of the valve rod 2 by the radius of eccentricity I. When the valve rod 2 rotates 90, the center 0 of the eccentric portion aligns with the X-axis as shown in FIG. 6, the new position of the eccentric portion being shown as O" in FIG. 6. As the valve plate 3 and the mounting block 4 are not secured with the eccentric portion 2, and the guide pin 10 is guided by the first portion of the guide groove 17 of the fixed ring 6, the valve plate 3 and the mounting block 4 retract from the valve seat 18 and displace rightward at eccentricity l. The curvature of the first portion of the guide groove 17 and the path of center 0' of the eccentric portion are the same, that is, the periphery of a circle having radius 1, as described before, thus the valve plate 3 retracts from the valve seat maintaining a relatively parallel position.

As the other guide pin 9 also moves along the periphery of a circle having a radius I, in the full retracted position shown in FIG. 6, the rotation guide pin 8 aligns on the X-axis and also aligns with the guide groove 16. Upon the rotation of the valve rod 2, the engaging pin 8, which is accommodated in the hole 15 of the moving ring 7 which is secured with the valve rod 2, rotates with the valve rod 2 and aligns on the X-axis and also aligns with the guide pin 9 and the guide groove 16. As shown in FIG. 9, the engaging pin 8 begins to enter into the tapered portion of the guide groove 16 and the guide pin 9 first enters into the hole 15 of the moving ring 7. When the guide pin 9 enters into the hole 15 of the moving ring 7, the mounting block 4 is locked to the moving ring 7, in turn being'secured to the valve rod 2. Thus, as long as the guide'pin 9 is in the hole 15, the mounting block 4 and the valve plate 3 rotate with the moving ring 7 and also with the valve rod 2. That is, the valve plate 3 rotates as the valve rod 2 is rotated in the latter 90 rotation thereof to the fully open position of the valve plate 3, shown in FIGS. 3, 7 and 10. More precisely, while the top end of the engaging pin 8 is in the guide groove 16, the guide pin 9 is urged upwards by the spring 11 to press the engaging pin 8 upward to the inner wall of the guide groove 16. Thus, the top portion of the guide pin 9 is projected into the hole to lock the mounting'block 4 to the moving ring 7. Both end portions of the groove 16 are tapered to facilitateentry thereinto and departure therefrom of the engaging pin 8.

At the end of the rotation of the valve rod 2, the moving ring 7,,the mounting block 4 and the valve plate 3 reach the fully open position shown in FIGS. 3, 7 and 10. The

pins

8, 9 and 10 align on the Y-axis and the valve plate 3 rotates without contacting the valve seat 18.

As the valve rod 2 rotates 180 from the closed position, in which the valve plate 3 closes the valve seat 18, to the fully open position, in which the valve plate 3 is parallel to the axis of the valve, the center'O of the eccentric portion 2, that is, the center of the valve plate 3 retracts twice the eccentricity, or 21. Consequently, although the outside diameter D of the valve plate 3 is larger than the inside diameter D of the valve seat 18, the valve plate 3 can be rotated without contacting the valve seat 18. The eccentricity l of the eccentric portion 2' can be selected from the outside diameter D of the valve plate 3, inside diameter D of the valve seat 18 and the distance W between the center of the valve rod 2 and the valve seat surface.

To close the valve, the operation is simply reversed. The valve rod 2 is rotated counterclockwise 180. With the first 90 of rotation, the valve plate rotates 90to the retracted position shown in FIG. 6, and with the next 90 of rotation, the valve plate 3 contacts the valve seat 18 to provide the closed position.

The fixed ring 6, moving ring 7, pins 8, 9 and 10, guide

grooves

16 and 17 are preferably provided at both the upper and lower portions of the valve rod '2, as shown in FIG. 1. The valve operating mechanism is very simple and positive operation is readily attained.

FIG. 11 shows an alternative embodiment of the engaging pin 8. A ball is inserted in a recess at the top surface of the pin 8. The ball 20 can pass through the tapered portion of the guide groove 16 easily and smoothly without causing excessive wear.

FIG. 12 shows another embodiment for urging the valveplate 3 to the valve seat 18 upon operation of the valve rod 2. In the closed position of the valve plate 3, shown in FIG. 12, the center of the eccentric portion 2' does not meet with the Y-axis and forms an angle a relative to the Y-axis. By displacing the center 0 of the valve rod leftward and inward from the position shown in FIG. 2, the closed'position shown in FIG. 12 can be attained. In this case, the rotation angle of the valve rod 2 to retract the valve plate 3 is decreased to 90 a. As

the angle a is small, a large urging force can be attained by relatively small rotational movement of the valve rod 2. If desired, the same effect can be attained by providing a slightly higher valve seat 18 in the first described embodiment. In this case the center axis of the valveseat and that of the valve plate are slightly displaced. I

FIG. 13 shows another embodiment of the guide pin 10 and the guide groove 17. The guide pin 10 guides the valve plate "3 only during retraction of the valve plate 3, so'that only the first curved portion having a I operation is also very simple. The valve can be closed 6 radius 1 is effective. By inserting a spring 21 underthe guide pin 'l0,the, guide groove 17 can be limited only to the first'portion as shown in FIG. 13. The three posipositively without causing excesssive wear.

Obviously many modifications and variations of the present invention are possible in light of these teachings. It is to be understood therefore that within the scope of the appended claims, the invention may be practiced otherwise than as specifically described herein.

What is claimed as new and desired to be secured by Letters Patent of the United States is:

1. In a valve including a valve body forming a fluid passageway therethrough, an annular valve seat coaxial with the axis of said fluid passageway, and a valve rod means rotatably disposed on the valve body perpendicular to the axis of said valve seat and adapted to be operated from outside said valve body, the improvement characterized by:

said valve rod having an integral eccentric portion;

a valve plate rotatably supported by said eccentric portion and engagable with said valve seat;

a first and a second guide pin disposed in said valve plate;

said valve body having a first guide groove to guide said first guide pin to retract said valve plate during a first portion of rotation of said valve rod;

said valve rod means forming recess means adapted to engage with said second guide pin;

means to engage said recess means with said second guide pin only during a second portion of rotation of said valve rod, whereby said valve plate first is retracted from said valve seat and then is rotated with said valve rod by rotation of the valve rod to open the valve.

2. A valve according to claim 1, further comprising:

mounting block means mounting said valve plate to said valve rod, said first and second guide pins being disposed in said mounting block means.

3. A valve according to claim 1, further comprising:

said valve rod means including a moving ring secured to said valve rod and having a through hole being said recess means;

and said means for engaging said recess means with said second guide pin being an engaging pin slidably disposed in said through hole and engageable with said second guide pin;

said valve body having a second guide groove engageable with said engaging pin, whereby during said second portion of rotation of the valve rod, said engaging pin engages said second guide groove and allows said second guide pin 'to slide into said through hole to lock said valveplate to saidvalve rod to rotate therewith.

4. A valve according to claim 1, wherein the relative positions in the valve closed position of said valve rod, said eccentric portion, said valve plate and said valve seat are determined such that a line through the centers of said valve rod and said eccentric portion forms an angle to the axis of said valve seat, whereby operation of said valve rod urges the valve plate toward the valve seat.

5. A valve according to claim 2, wherein the relative positions in the valve closed position of said valve rod, said eccentric portion, said valve plate and said valve seat are determined such that a line through the centers of said valve rod and said eccentric portion froms an angle to the axis of said valve seat, whereby operation of said valve rod urges the valve plate toward the valve seat.

Claims

1. In a valve including a valve body forming a fluid passageway therethrough, an annular valve seat coaxial with the axis of said fluid paSsageway, and a valve rod means rotatably disposed on the valve body perpendicular to the axis of said valve seat and adapted to be operated from outside said valve body, the improvement characterized by: said valve rod having an integral eccentric portion; a valve plate rotatably supported by said eccentric portion and engagable with said valve seat; a first and a second guide pin disposed in said valve plate; said valve body having a first guide groove to guide said first guide pin to retract said valve plate during a first portion of rotation of said valve rod; said valve rod means forming recess means adapted to engage with said second guide pin; means to engage said recess means with said second guide pin only during a second portion of rotation of said valve rod, whereby said valve plate first is retracted from said valve seat and then is rotated with said valve rod by rotation of the valve rod to open the valve.

2. A valve according to claim 1, further comprising: mounting block means mounting said valve plate to said valve rod, said first and second guide pins being disposed in said mounting block means.

3. A valve according to claim 1, further comprising: said valve rod means including a moving ring secured to said valve rod and having a through hole being said recess means; and said means for engaging said recess means with said second guide pin being an engaging pin slidably disposed in said through hole and engageable with said second guide pin; said valve body having a second guide groove engageable with said engaging pin, whereby during said second portion of rotation of the valve rod, said engaging pin engages said second guide groove and allows said second guide pin to slide into said through hole to lock said valve plate to said valve rod to rotate therewith.

6. A valve according to claim 3, wherein the relative positions in the valve closed position of said valve rod, said eccentric portion, said valve plate and said valve seat are determined such that a line through the centers of said valve rod and said eccentric portion forms an angle to the axis of said valve seat, whereby operation of said valve rod urges the valve plate toward the valve seat.