CA1147710A - Cock or the like and manufacturing methods relating thereto - Google Patents
Cock or the like and manufacturing methods relating theretoInfo
- Publication number
- CA1147710A CA1147710A CA000362566A CA362566A CA1147710A CA 1147710 A CA1147710 A CA 1147710A CA 000362566 A CA000362566 A CA 000362566A CA 362566 A CA362566 A CA 362566A CA 1147710 A CA1147710 A CA 1147710A
- Authority
- CA
- Canada
- Prior art keywords
- flange
- annular
- piece
- cock
- central opening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/10—Welded housings
- F16K27/107—Welded housings for taps or cocks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0626—Easy mounting or dismounting means
- F16K5/0631—Easy mounting or dismounting means between two flanges
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
- Valve Housings (AREA)
- Multiple-Way Valves (AREA)
Abstract
IN THE PATENT OFFICE
PATENT APPLICATION
entitled COCK OR THE LIKE AND MANUFACTURING
METHODS RELATING THERETO
in the name of Jean GACHOT
ABSTRACT OF THE DISCLOSURE
The cock comprises a body clamped between two flanges provided with a central opening. The body is traversed by a passage in which is mounted an obturator connected in rotation to a control shaft. The body comprises a tubular section whose annular ends are fitted into a groove of each of the flanges.
A fluid-tight seal is positioned at the bottom of the groove.
The invention is particularly useful in manufacturing light and economical ball-cocks.
PATENT APPLICATION
entitled COCK OR THE LIKE AND MANUFACTURING
METHODS RELATING THERETO
in the name of Jean GACHOT
ABSTRACT OF THE DISCLOSURE
The cock comprises a body clamped between two flanges provided with a central opening. The body is traversed by a passage in which is mounted an obturator connected in rotation to a control shaft. The body comprises a tubular section whose annular ends are fitted into a groove of each of the flanges.
A fluid-tight seal is positioned at the bottom of the groove.
The invention is particularly useful in manufacturing light and economical ball-cocks.
Description
BAC~GROUND OF THE INVEN~ION
1. Field of the Invention The present invention relates to a cock (this term here being synonymous with valve),eæp~a~y for industrial use, this cock having a structure of a nature enabling itB manufacture under particularly economical conditions. The invention also relates to the methods of manufacturing the cock concerned.
The cocks to which the invention relates compri~e a body clamped between flanges and traversed by a pas~age in which is mounted an obturator member connected in rotation to a control shaft.
1. Field of the Invention The present invention relates to a cock (this term here being synonymous with valve),eæp~a~y for industrial use, this cock having a structure of a nature enabling itB manufacture under particularly economical conditions. The invention also relates to the methods of manufacturing the cock concerned.
The cocks to which the invention relates compri~e a body clamped between flanges and traversed by a pas~age in which is mounted an obturator member connected in rotation to a control shaft.
2. DescriPtion of the Prior Art Cocks of this type are known in which the body has onthe sectionof eachannular end, Q groove in which is housed a ~eal ensuring the fluid-tightness of this body with the adja-cent flanges.
To permit the machining of thi~ groove $n the thick-ness of the body, it is the pr~ctice to use for these cocks, bodie~ produced from thick molded or forged blank~, according to a well established usage for a great many types of cock~.
The construction indicated above thus leads to a heavy cock whose cost price is high on account of its weight and of the ~anufacturing processe~ involved.
It is an object of the invention to overcome these drawbacks by providing a light and economical cock.
It is another object of the invention toprovide rapid and non-laborious methods for the industrial manufacture of such a cock.
~F , :114-~710 GENERAL DESCRIPTION OF THE INVENTION
According to the invention, there is provided in a cock comprising a tubular body having annular ends, two flanges each having a central opening and an annular groove surrounding the central opening, a fluidtight seal at the bottom of each groove, means releasably securing said body and flanges in assembled relationship with said ends of said body disposed in said grooves, an obturator ball having a passage therethrough disposed in said body, a control shaft for rotating the ball, the control shaft being sealingly and rotatably mounted in a bore in said body, and two annular seats, each annular seat being located at one respective annular end of said body and bearing against the obturator ball; the improvement comprising means located around the central opening of each flange, and independent of said releasable securing means for supporting said seats by the respective flanges.
According to an advantageous embodiment of the invention, each seat is borne by an annular diaphragm whose outer edge is fixed to the respective flange. This diaphragm ensures an elastic support of the seat against the ball.
According to another aspect of the invention, the manufacturing method for the above cock is characterized in that there are fitted against one another a diaphragm and a tubular coupling end-piece in the central opening of each flange, and in that by electron bombardment a cylindrical weld bead is formed on the periphery of this opening to fix the end-piece and the diaphragm to the flange simultaneously.
Thus, the assembly of the parts before welding is easy,
To permit the machining of thi~ groove $n the thick-ness of the body, it is the pr~ctice to use for these cocks, bodie~ produced from thick molded or forged blank~, according to a well established usage for a great many types of cock~.
The construction indicated above thus leads to a heavy cock whose cost price is high on account of its weight and of the ~anufacturing processe~ involved.
It is an object of the invention to overcome these drawbacks by providing a light and economical cock.
It is another object of the invention toprovide rapid and non-laborious methods for the industrial manufacture of such a cock.
~F , :114-~710 GENERAL DESCRIPTION OF THE INVENTION
According to the invention, there is provided in a cock comprising a tubular body having annular ends, two flanges each having a central opening and an annular groove surrounding the central opening, a fluidtight seal at the bottom of each groove, means releasably securing said body and flanges in assembled relationship with said ends of said body disposed in said grooves, an obturator ball having a passage therethrough disposed in said body, a control shaft for rotating the ball, the control shaft being sealingly and rotatably mounted in a bore in said body, and two annular seats, each annular seat being located at one respective annular end of said body and bearing against the obturator ball; the improvement comprising means located around the central opening of each flange, and independent of said releasable securing means for supporting said seats by the respective flanges.
According to an advantageous embodiment of the invention, each seat is borne by an annular diaphragm whose outer edge is fixed to the respective flange. This diaphragm ensures an elastic support of the seat against the ball.
According to another aspect of the invention, the manufacturing method for the above cock is characterized in that there are fitted against one another a diaphragm and a tubular coupling end-piece in the central opening of each flange, and in that by electron bombardment a cylindrical weld bead is formed on the periphery of this opening to fix the end-piece and the diaphragm to the flange simultaneously.
Thus, the assembly of the parts before welding is easy,
- 3 -.~
and the welding, produced in the mass and without oxidation by electron bombardment, is particularly strong, all the more since there is prior fitting of the parts.
According to another aspect of the invention, the manufacturing method of a ball-cock in which each seat is mounted in an annular recess formed around the central opening of each flange is characterized in that a tubular coupling end-piece is ensleeved in each of the flanges, in that this end-piece is welded to the flange by electron bombardment, and in that around the central opening of the flange there is machined for the seat an annular recess separated from the passage reserved for the flow by the annular end of the end-piece.
11~7710 This method leads to machining the ~nnular gap into or in the immediate proximity of the weld of the end-piece, which is made possible by the use of welding by electron bombardment which bonds the welded parts intimately together.
Thus, the seat i8 very close to the periphery of the opening of the flange without however creating a protuberance which impedes the flow in the open position of the cock.
Other features and advantages of the present inven-tion will emerge also from the description which follows.
BRIEF DESCRIPTION OF THE DRAWINGS
In the accompanying drawings, showing purely by way of non-limiting example~, preferred embodiment~ of the invention;
Figure 1 i8 a view, in section along the flow axis, of an embodiment of a cock according to the invention ;
Figure 2 is a front view, in partial section along the line II-II of the embodiment of Figure 1 ;
Figure 3 is a partial view of the embodiment of Figure 1 on an enlarged scale ;
Figure 4 is a perspective view of the tubular section of the body ;
E`i~ures 5 to 7 and 10 are partial views,in ~ection along the flow axis of the cock, of different embodiment~ of the cock aecording to the invention ; and Figures 8 and 9 sre partisl ~ectional views illustra-ting the manufacturing method of the cock of Figure 10.
-- 6 _ DESCXIPTION OF PREFERRED E~BODI~ENTS
The invention will be de~cribed more particularly, but without limitation, in its application to a ball-cock.
As is seen in~'igures 1 to 4, the cock comprise~
a body 1 clamped between two substantially square flanges 2 by mean~ of four tie-bolt~ 3 mounted at the four corners of the flanges 2.
The latter each have a central opening 4~of axi~ XX2 for the pa~sage of the fluid whose flow has to be control-led.
The body 1 i8 traver~ed by a cylindrical pas~age5, of axis XX (Figure 1), of diameter substantially greater than that of the openings 4. In thi~ passage 5 is mounted a ball 6 connected in rotation to a control shaft 7 of axis YY transverse to the axis XX. 'rhe end 8 of the shaft 7 directed towArds the ball 6 is flattened and engaged in a slot 9 of the ball 6 to ensure this connection in rotation.
The ball 6 is traversed by a cylindrical duct 11 coaxial with XX in the open position of the oock, and at right e~ngle~ to the axes XX and YY in the closed position.
According to the invention, the body 1 comprise~
a tubular section 12 whose two annular end~ 13 are each fitted in an annular groove 14, of rectangular section, formed on the surface of the flange~ 2 turned towards the ball 6, around the central opening 4.
An annular fluid-tight seAl 15, for ex~mple of ~1~7~10 polytetrafluorethyleneor other polyfluorinated resin, i5 confined between the end 13 of the tubular ~ection 12, the bottom and the two lateral ~urfaces of the groove 14.
The thickness of the wall of the section 12 i~
about 10 to 15 % of the radius of the passage 5 in the example ~hown, but could be different, e~p~i~4y according to the rated flow pressure.
Thi~ thickness may obviously be increa~ed well beyond the above values if there is no fear of increasing the weight and the cost price of the cock.
A packing-box 16, through which the shaft 7 passes is fixed to the section 12 by means of an annular weld bead 17 which encircles a bore 18 formed in the section 12 for the passage of the shaft 6. The box of the packing-box 16 carries two stops 19 which limit the travel, bet~een two extreme posi-tions, of a control handle 21 connected in rotation to the shaft 7 opposite the ball 6.
According to a particular feature of the invention, the tubular section 12 i8 sawn to the desired length ~rom an extruded tube. According to a modification (Figure 4), it is produced from a rectangular sheet metal part, initially flat, then rolled into a cylinder whose two edges thus brought opposite one another are bonded by a weld fillet 12a.
The ball 6 i8 supported between two annul~r seats 22 each mounted at one end of the passage 5, 80 as to encircle the ends of the duct 11 in the open position of the cock.
114771~) -- 8 _ Each of the seats 22, for example, of polytetra-fluorethylene or other polyfluorinated resin, i~ borne by the adjacent flange 2 through an annular diaphragm 23 against which it is glued, or ~imply clamped by the ball 6. The outer edge 24 of the diaphragm 23 is fixed to the surface of the flange 2 turned toward the other flange 2,by a weld bead 25 (Figure 3).
Each diaphragm 23 ha~ a substantially Z-shaped profile which includes beyond the outer, substantially radial edge24, a substantially cylindrical w~b 26 directed oppositely to ~he ball 6 and followed by an inner edge 27 directed almost radially towards the axis XX. The profile thus adopted confers a certain elasticity on the web 26 enabling it to work in flexion relative to the edge 24.
Each seat 22 has a profile complementary to that of the web 26 and the edge 27 enabling it to be fitted into the latter, and, on the outer side, a spherical support ~urface 32 for the ball 6 (Figure 3).
Each flange 2 bears a tubular end-piece 33 dire¢ted oppo~ite the ball 6 to enable the connection Or the cock to the piping (not shown). The end-piece~ 33 are fixed by annular weld bead3 34 again~t the ~urface of the flanges 2 opposite that which already bears the bead 25.
The cock described above i~ particularly light on account of it~ thin-walled body, and particularly economical 11'1771~
_ g _ to produce, if the simplicity of the section 12 i8 compared with the bodies of known cocks.
This embodiment necessitate~ however two weld beads 25and 34 for each flange 2.
To overcome this drawback, in the embodiment shown in Figure 5, the outer edge of the diaphragm 41 i~ interposed between the end-piece 33 and the flange 2, ~o that the weld bead 34 ~imultaneously ensures the fixing of the end-piece 33 and of the diaphragm 41.
The diaphragm 41 comprises a curved web 42 directed towards the axis XX' from its aforesaid outer edge, and a cylindrical rim 43. ~he seat 22 i~ fitted on the collar ring thus formed by the web 42 and the rim 43.
The manufacture of this cock ie simpler than that of the cocks shown in Figures 1 to 4. The weld bead 34 is how-ever rather delicate to produce,ecpeci~Uy as regards the holding of the parts before welding and there i8 a risk oi it~ being fragile in use.
In the embodiment ~hown in Figure 6, which tend~
to remedythi~ conetraint,the flange 52 is eimilar to the flange 2, except for its central opening 54 which i~ of enlarged diameter to enable the end-piece 33 and the diaphragm 23 (similar to that described with reference to Figure~ 1 to 4), to be fitted therein, the ~uter diameter of the diaphragm bei~B
the sa~e ~ t~lat o~ the end-piece 33.
11~7710 The diaphragm 23 and the end-piece 33 fitted again~t one another in the opening 54, are connected to the flange 52 by a common cylindrical weld bead 55 produced by electron bombardment along the surface of the opening 54.
Due to the prior fitting of the part~, which facili-tate~ their po~itioning before welding, and to the welding by ~ectxan banba~dment which i~ produced in the metal mass and without oxidation, this embodiment and its method of manufacture ensure a very solid fixing of the diaphragm 23 and of the end-piece 33 with a single weld bead.
In the embodiment shown in Figure 7, there are used, on the contrary, ~lange~ 62 whose opening 64 i8 of reduced diameter with respect to the flange~ 2.
The ~eat 22 is fitted into an annular groove created between the surface of the opening 64 of the flange 62 and an applied diaphragm 65 ~ith a Z-shaped profile fixed against this flange and whose central web 63 project~ towards the axis XX. The end-pieces 33 are fixed again~t the collar 67 of the flange~ 62 directed oppo~itely to the ball 5 by an annular weld bead 68. The latter also fixes the outer dge 69 of the diaphragm 65 and the flange 62.
As seen in F~ gure~ 8 to 10, it is not indi~pen~able to provide a diaphragm to support the seat.
According to the method of manufacture dsvi~ed for this construction, it commence~ by ensleeving (Figure 8) the 1~47710 1, _ end-piece 73, of smaller diameter than the end-piece 33, up to about the middle of the opening 74, also of reduced dia-meter, formed in the flange 72, and this end-piece 73 i9 welded to the flange 72 by a cylindrical weld bead 75 formed by electron bombardment along the peripheral Rurf~ce of the opening 74.
An annular gap 76 i8 then machined (Figure 9) around the opening 74, 80 that this machining involves at the same time the flask 72~ the end of the end-piece 73, as well as the weld bead 75.
The recess 76 is thus separated from the passage reserved for the flow by the thinned end of the end-piece 7~.
The seat 22 is then installed in this gap and borne by three adjacent faces re~pectively against the two cylindrical faces and the flat bottom of the recess ~6 (Figure 10).
The so-constituted cock includes a ball 6 whose conduit 11 has the same diameter as the end-pieoes 73, 80 that the pressure drop in the fully open position i~ particularly low.
All these embodiments can satisfy various uee~ of the cock or various conditions of manufacture, or again procure a more or less elastic support of the seats according to the nature of the latter, but generally, the invention enables the production of a particularly li~ht and economical cock by referring ~G the flanges, necessarily solid, all the mechanical ~ealing functions, which permits the utilization of a parti-cularly simple body.
1~7710 Of course, the invention i9 not limited to examples described, and numerous modifications may be introduced into these examples without departing from its scope.
Thus the seats could be borne by a radial collar of the flanges, without using a diaphragm nor making the end-piece to participate in the support of these 8eat8.
and the welding, produced in the mass and without oxidation by electron bombardment, is particularly strong, all the more since there is prior fitting of the parts.
According to another aspect of the invention, the manufacturing method of a ball-cock in which each seat is mounted in an annular recess formed around the central opening of each flange is characterized in that a tubular coupling end-piece is ensleeved in each of the flanges, in that this end-piece is welded to the flange by electron bombardment, and in that around the central opening of the flange there is machined for the seat an annular recess separated from the passage reserved for the flow by the annular end of the end-piece.
11~7710 This method leads to machining the ~nnular gap into or in the immediate proximity of the weld of the end-piece, which is made possible by the use of welding by electron bombardment which bonds the welded parts intimately together.
Thus, the seat i8 very close to the periphery of the opening of the flange without however creating a protuberance which impedes the flow in the open position of the cock.
Other features and advantages of the present inven-tion will emerge also from the description which follows.
BRIEF DESCRIPTION OF THE DRAWINGS
In the accompanying drawings, showing purely by way of non-limiting example~, preferred embodiment~ of the invention;
Figure 1 i8 a view, in section along the flow axis, of an embodiment of a cock according to the invention ;
Figure 2 is a front view, in partial section along the line II-II of the embodiment of Figure 1 ;
Figure 3 is a partial view of the embodiment of Figure 1 on an enlarged scale ;
Figure 4 is a perspective view of the tubular section of the body ;
E`i~ures 5 to 7 and 10 are partial views,in ~ection along the flow axis of the cock, of different embodiment~ of the cock aecording to the invention ; and Figures 8 and 9 sre partisl ~ectional views illustra-ting the manufacturing method of the cock of Figure 10.
-- 6 _ DESCXIPTION OF PREFERRED E~BODI~ENTS
The invention will be de~cribed more particularly, but without limitation, in its application to a ball-cock.
As is seen in~'igures 1 to 4, the cock comprise~
a body 1 clamped between two substantially square flanges 2 by mean~ of four tie-bolt~ 3 mounted at the four corners of the flanges 2.
The latter each have a central opening 4~of axi~ XX2 for the pa~sage of the fluid whose flow has to be control-led.
The body 1 i8 traver~ed by a cylindrical pas~age5, of axis XX (Figure 1), of diameter substantially greater than that of the openings 4. In thi~ passage 5 is mounted a ball 6 connected in rotation to a control shaft 7 of axis YY transverse to the axis XX. 'rhe end 8 of the shaft 7 directed towArds the ball 6 is flattened and engaged in a slot 9 of the ball 6 to ensure this connection in rotation.
The ball 6 is traversed by a cylindrical duct 11 coaxial with XX in the open position of the oock, and at right e~ngle~ to the axes XX and YY in the closed position.
According to the invention, the body 1 comprise~
a tubular section 12 whose two annular end~ 13 are each fitted in an annular groove 14, of rectangular section, formed on the surface of the flange~ 2 turned towards the ball 6, around the central opening 4.
An annular fluid-tight seAl 15, for ex~mple of ~1~7~10 polytetrafluorethyleneor other polyfluorinated resin, i5 confined between the end 13 of the tubular ~ection 12, the bottom and the two lateral ~urfaces of the groove 14.
The thickness of the wall of the section 12 i~
about 10 to 15 % of the radius of the passage 5 in the example ~hown, but could be different, e~p~i~4y according to the rated flow pressure.
Thi~ thickness may obviously be increa~ed well beyond the above values if there is no fear of increasing the weight and the cost price of the cock.
A packing-box 16, through which the shaft 7 passes is fixed to the section 12 by means of an annular weld bead 17 which encircles a bore 18 formed in the section 12 for the passage of the shaft 6. The box of the packing-box 16 carries two stops 19 which limit the travel, bet~een two extreme posi-tions, of a control handle 21 connected in rotation to the shaft 7 opposite the ball 6.
According to a particular feature of the invention, the tubular section 12 i8 sawn to the desired length ~rom an extruded tube. According to a modification (Figure 4), it is produced from a rectangular sheet metal part, initially flat, then rolled into a cylinder whose two edges thus brought opposite one another are bonded by a weld fillet 12a.
The ball 6 i8 supported between two annul~r seats 22 each mounted at one end of the passage 5, 80 as to encircle the ends of the duct 11 in the open position of the cock.
114771~) -- 8 _ Each of the seats 22, for example, of polytetra-fluorethylene or other polyfluorinated resin, i~ borne by the adjacent flange 2 through an annular diaphragm 23 against which it is glued, or ~imply clamped by the ball 6. The outer edge 24 of the diaphragm 23 is fixed to the surface of the flange 2 turned toward the other flange 2,by a weld bead 25 (Figure 3).
Each diaphragm 23 ha~ a substantially Z-shaped profile which includes beyond the outer, substantially radial edge24, a substantially cylindrical w~b 26 directed oppositely to ~he ball 6 and followed by an inner edge 27 directed almost radially towards the axis XX. The profile thus adopted confers a certain elasticity on the web 26 enabling it to work in flexion relative to the edge 24.
Each seat 22 has a profile complementary to that of the web 26 and the edge 27 enabling it to be fitted into the latter, and, on the outer side, a spherical support ~urface 32 for the ball 6 (Figure 3).
Each flange 2 bears a tubular end-piece 33 dire¢ted oppo~ite the ball 6 to enable the connection Or the cock to the piping (not shown). The end-piece~ 33 are fixed by annular weld bead3 34 again~t the ~urface of the flanges 2 opposite that which already bears the bead 25.
The cock described above i~ particularly light on account of it~ thin-walled body, and particularly economical 11'1771~
_ g _ to produce, if the simplicity of the section 12 i8 compared with the bodies of known cocks.
This embodiment necessitate~ however two weld beads 25and 34 for each flange 2.
To overcome this drawback, in the embodiment shown in Figure 5, the outer edge of the diaphragm 41 i~ interposed between the end-piece 33 and the flange 2, ~o that the weld bead 34 ~imultaneously ensures the fixing of the end-piece 33 and of the diaphragm 41.
The diaphragm 41 comprises a curved web 42 directed towards the axis XX' from its aforesaid outer edge, and a cylindrical rim 43. ~he seat 22 i~ fitted on the collar ring thus formed by the web 42 and the rim 43.
The manufacture of this cock ie simpler than that of the cocks shown in Figures 1 to 4. The weld bead 34 is how-ever rather delicate to produce,ecpeci~Uy as regards the holding of the parts before welding and there i8 a risk oi it~ being fragile in use.
In the embodiment ~hown in Figure 6, which tend~
to remedythi~ conetraint,the flange 52 is eimilar to the flange 2, except for its central opening 54 which i~ of enlarged diameter to enable the end-piece 33 and the diaphragm 23 (similar to that described with reference to Figure~ 1 to 4), to be fitted therein, the ~uter diameter of the diaphragm bei~B
the sa~e ~ t~lat o~ the end-piece 33.
11~7710 The diaphragm 23 and the end-piece 33 fitted again~t one another in the opening 54, are connected to the flange 52 by a common cylindrical weld bead 55 produced by electron bombardment along the surface of the opening 54.
Due to the prior fitting of the part~, which facili-tate~ their po~itioning before welding, and to the welding by ~ectxan banba~dment which i~ produced in the metal mass and without oxidation, this embodiment and its method of manufacture ensure a very solid fixing of the diaphragm 23 and of the end-piece 33 with a single weld bead.
In the embodiment shown in Figure 7, there are used, on the contrary, ~lange~ 62 whose opening 64 i8 of reduced diameter with respect to the flange~ 2.
The ~eat 22 is fitted into an annular groove created between the surface of the opening 64 of the flange 62 and an applied diaphragm 65 ~ith a Z-shaped profile fixed against this flange and whose central web 63 project~ towards the axis XX. The end-pieces 33 are fixed again~t the collar 67 of the flange~ 62 directed oppo~itely to the ball 5 by an annular weld bead 68. The latter also fixes the outer dge 69 of the diaphragm 65 and the flange 62.
As seen in F~ gure~ 8 to 10, it is not indi~pen~able to provide a diaphragm to support the seat.
According to the method of manufacture dsvi~ed for this construction, it commence~ by ensleeving (Figure 8) the 1~47710 1, _ end-piece 73, of smaller diameter than the end-piece 33, up to about the middle of the opening 74, also of reduced dia-meter, formed in the flange 72, and this end-piece 73 i9 welded to the flange 72 by a cylindrical weld bead 75 formed by electron bombardment along the peripheral Rurf~ce of the opening 74.
An annular gap 76 i8 then machined (Figure 9) around the opening 74, 80 that this machining involves at the same time the flask 72~ the end of the end-piece 73, as well as the weld bead 75.
The recess 76 is thus separated from the passage reserved for the flow by the thinned end of the end-piece 7~.
The seat 22 is then installed in this gap and borne by three adjacent faces re~pectively against the two cylindrical faces and the flat bottom of the recess ~6 (Figure 10).
The so-constituted cock includes a ball 6 whose conduit 11 has the same diameter as the end-pieoes 73, 80 that the pressure drop in the fully open position i~ particularly low.
All these embodiments can satisfy various uee~ of the cock or various conditions of manufacture, or again procure a more or less elastic support of the seats according to the nature of the latter, but generally, the invention enables the production of a particularly li~ht and economical cock by referring ~G the flanges, necessarily solid, all the mechanical ~ealing functions, which permits the utilization of a parti-cularly simple body.
1~7710 Of course, the invention i9 not limited to examples described, and numerous modifications may be introduced into these examples without departing from its scope.
Thus the seats could be borne by a radial collar of the flanges, without using a diaphragm nor making the end-piece to participate in the support of these 8eat8.
Claims (12)
PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In a cock comprising a tubular body having annular ends, two flanges each having a central opening and an annular groove surrounding the central opening, a fluidtight seal at the bottom of each groove, means releasably securing said body and flanges in assembled relationship with said ends of said body disposed in said grooves, an obturator ball having a passage there-through disposed in said body, a control shaft for rotating the ball, the control shaft being sealingly and rotatably mounted in a bore in said body, and two annular seats, each annular seat being located at one respective annular end of said body and bearing against the obturator ball; the improve-ment comprising means located around the central opening of each flange, and independent of said releasable securing means for supporting said seats by the respective flanges.
2. Cock according to claim 1 in which each seat is of a polyfluorinated resin.
3. Cock according to claim 1, in which each of the seats is borne, at least in part, by an annular member welded to the flange in the vicinity of the central opening thereof.
4. Cock according to claim 3, wherein each annular member is an end piece having an annular end ensleeved in the central opening of the respective flange, the seat being mounted in an annular recess defined commonly by the end piece and the flange.
5. Cock according to claim 3, in which each annular member is a metal diaphragm whose outer edge is welded to the respective flange.
6. Cock according to claim 5, wherein each flange bears a tubular end-piece, directed oppositely to the ball, and wherein the end-piece and the diaphragm are fixed to the flange by a common weld bead.
7. Cock according to claim 6, wherein the flange is welded against the annular end of the end-piece, with the interposition of the peripheral portion of the diaphragm.
8. Cock according to claim 6, wherein the diameter of the tubular section is greater than that of the end-piece, and wherein the end-piece is ensleeved in the central opening of the flange.
9. Cock according to claim 5, wherein the profile of the diaphragm permits its elastic deformation with respect to the flange whilst ensuring the fitting of the seat of the obturator.
10. Cock according to claim 1, wherein each set is mounted in an annular recess formed around the central opening of each flange.
11. Method of manufacturing a ball-cock in association with claim 8, com-prising fitting against one another an annular metal diaphragm and a tubular coupling end-piece in the central opening of each flange, and forming by electronic bombardment a cylindrical weld bead on the periphery of said opening to fix the end-piece and the diaphragm to the flange simultaneously.
12. Method of manufacturing a ball-cock in accordance with claim 4, com-prising ensleeving a tubular coupling end-piece having annular ends, in each of the flanges, welding said end-piece to the flange by electronic bombardment, and machining for receiving the seat for the obturator ball, around the central opening of the flange, an annular recess separated from said passage by the annular end of the end piece.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7926226 | 1979-10-23 | ||
| FR7926226A FR2468048A1 (en) | 1979-10-23 | 1979-10-23 | TAP OR THE LIKE AND METHODS OF MANUFACTURING THEREFOR |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1147710A true CA1147710A (en) | 1983-06-07 |
Family
ID=9230921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000362566A Expired CA1147710A (en) | 1979-10-23 | 1980-10-16 | Cock or the like and manufacturing methods relating thereto |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0027765B1 (en) |
| AT (1) | ATE4389T1 (en) |
| CA (1) | CA1147710A (en) |
| DE (1) | DE3064497D1 (en) |
| FR (1) | FR2468048A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE76948T1 (en) * | 1988-09-14 | 1992-06-15 | Honeywell Lucifer Sa | VALVE FOR FLUID. |
| US5401478A (en) * | 1993-08-03 | 1995-03-28 | Mobil Oil Corp. | Selective catalytic reduction of nitrogen oxides |
| ES2189548B1 (en) * | 1998-12-28 | 2004-04-16 | Pablo Fuente Viadas | BODIES OF MOTORIZED VALVES OF PROPORTIONAL CONTROL. |
| ATE344115T1 (en) | 2001-06-15 | 2006-11-15 | Josch Strahlschweisstechnik Gm | BASE BODY MADE OF JOINED PIECES OF PIPE AND METHOD FOR PRODUCING IT |
| CN102441771A (en) * | 2011-10-18 | 2012-05-09 | 天津国际机械有限公司 | Processing technique of valve parts in ball valve with hard seal structure |
| CN102748519A (en) * | 2012-07-09 | 2012-10-24 | 兰州高压阀门有限公司 | Novel high-pressure large-diameter fully-welded ball valve |
| CN108591518B (en) * | 2018-06-08 | 2024-01-02 | 五洲阀门股份有限公司 | Double positioning ball valve |
| CN114434112A (en) * | 2022-03-10 | 2022-05-06 | 苏州工业园区博斯塔机械有限公司 | Method for processing special-shaped hole ball |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1334748A (en) * | 1962-09-27 | 1963-08-09 | Raybestos Manhattan | Coated ball valve |
| FR1543939A (en) * | 1967-01-31 | 1968-10-31 | Advanced seal for ball valves | |
| US3545721A (en) * | 1967-11-06 | 1970-12-08 | Homer J Shafer | Welded ball valve and method of making |
| US3743242A (en) * | 1971-05-17 | 1973-07-03 | D Scaramucci | Apparatus for retaining in assembled condition a valve for use between flanges |
| FR2257831A1 (en) * | 1973-11-06 | 1975-08-08 | Gachot Sa | Sealing assembly for a ball valve - has seals cut from sheet of carbon fibres and expanded graphite |
| DE2427783C3 (en) * | 1974-06-08 | 1985-05-30 | Deutsche Audco Gmbh, 2081 Prisdorf | Welded housing for a ball valve |
-
1979
- 1979-10-23 FR FR7926226A patent/FR2468048A1/en active Granted
-
1980
- 1980-10-16 CA CA000362566A patent/CA1147710A/en not_active Expired
- 1980-10-17 EP EP80401479A patent/EP0027765B1/en not_active Expired
- 1980-10-17 AT AT80401479T patent/ATE4389T1/en active
- 1980-10-17 DE DE8080401479T patent/DE3064497D1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2468048B1 (en) | 1984-09-21 |
| FR2468048A1 (en) | 1981-04-30 |
| DE3064497D1 (en) | 1983-09-08 |
| EP0027765B1 (en) | 1983-08-03 |
| ATE4389T1 (en) | 1983-08-15 |
| EP0027765A1 (en) | 1981-04-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |