CA2145119A1 - Shut-off valve for pipelines, in particular for liquid containers - Google Patents
Shut-off valve for pipelines, in particular for liquid containersInfo
- Publication number
- CA2145119A1 CA2145119A1 CA 2145119 CA2145119A CA2145119A1 CA 2145119 A1 CA2145119 A1 CA 2145119A1 CA 2145119 CA2145119 CA 2145119 CA 2145119 A CA2145119 A CA 2145119A CA 2145119 A1 CA2145119 A1 CA 2145119A1
- Authority
- CA
- Canada
- Prior art keywords
- shut
- valve
- sealing
- closing body
- valve according
- 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.)
- Abandoned
Links
- 239000007788 liquid Substances 0.000 title claims description 11
- 238000007789 sealing Methods 0.000 claims abstract description 44
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 5
- 239000010959 steel Substances 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 11
- 239000010935 stainless steel Substances 0.000 claims description 2
- 244000043261 Hevea brasiliensis Species 0.000 claims 1
- 229910010293 ceramic material Inorganic materials 0.000 claims 1
- 239000013013 elastic material Substances 0.000 claims 1
- 229920001971 elastomer Polymers 0.000 claims 1
- 229920003052 natural elastomer Polymers 0.000 claims 1
- 229920001194 natural rubber Polymers 0.000 claims 1
- 239000004033 plastic Substances 0.000 claims 1
- 229920001296 polysiloxane Polymers 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract description 7
- 239000012459 cleaning agent Substances 0.000 abstract description 4
- 239000003566 sealing material Substances 0.000 abstract description 3
- 239000006185 dispersion Substances 0.000 abstract description 2
- 230000001747 exhibiting effect Effects 0.000 abstract description 2
- 235000013336 milk Nutrition 0.000 abstract description 2
- 239000008267 milk Substances 0.000 abstract description 2
- 210000004080 milk Anatomy 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- -1 foodstuffs Substances 0.000 abstract 1
- 239000011344 liquid material Substances 0.000 abstract 1
- 238000004140 cleaning Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 235000013365 dairy product Nutrition 0.000 description 3
- 230000008021 deposition Effects 0.000 description 2
- 239000000645 desinfectant Substances 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000036512 infertility Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 230000009974 thixotropic effect Effects 0.000 description 2
- 244000052616 bacterial pathogen Species 0.000 description 1
- 235000014121 butter Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 235000019197 fats Nutrition 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 230000005226 mechanical processes and functions Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- 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
- F16K5/0605—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 with particular plug arrangements, e.g. particular shape or built-in means
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
- Lift Valve (AREA)
Abstract
The invention relates to an environmentally friendly shut-off valve for passing liquid materials, chemicals, dispersions, foodstuffs, milk and the like which are in particular sensitive to temperature and movement. The shut-off valve made of a high-grade steel and provided with sealing materials which are allowed for the various mediums enables a large passage exhibiting little turbulence, whilst avoiding the disadvantageous formation of deposits. The shut-off valve, which has no dead spaces, consists of only three different parts and can be perfectly cleaned by mechanical means without using cleaning agents which burden the environment. Exchanging the sealings can be done particularly quickly and in a simple manner.
Description
A shut-off valve for pipelines, in particular for liquid containers.
The invention relates to a shut-off valve for pipelines, in particular for liquid containers, comprising at least one closing body capable of pivoting through 90 and a passage provided transversely to the pivot axis for opening and closing the internal passage over its entire section, whereby said closing body is free fram material on one side near said passage, in a direction transversely to the longitudinal axis, and whereby said closing body has a so-called C-shape.
A great advantage of ball valve cocks of the known kind, which comprise passages for opening and closing the cock recessed transversely to the pivoting direction, whereby the internal passage is released over its entire section, in comparison with the known shut-off valves comprising hinged flaps is that in the open position of the valve a substantially laminar flow exhibiting little turbulence can be achieved.
Undesirable formation of deposits on the parts of the shut-off valve present within the passage is thus substantially prevented.
A major drawback of ball valves of this kind is, however, that in the closed position of the ball valve a residual amount of the liquid medium is left behind in the passage of the closing ball, and that a disadvantageous formation of deposits takes place at that location. It is not possible to remove this entrapped residual material, whilst it is furthermore not possible to clean the valve mechanically in the closed position of the ball valve.
From DE-OS 23 18 476 a rotary ball valve is known, which is U-shaped, that is free from material on one side, transversely to the longitudinal axis. In the case of nuclear water operation this configuration must make it possible to remove such a closing body from a shut-off valve welded in a pipeline. Because of the presence of the sealing ring let down into the ball segment, which only provides a sealing function, considerable dead spaces are formed beside the passage between the shut-off valve and the housing. Not only do these dead spaces generate a substantial amount of harmful turbulence, but in addition to this these dead spaces become clogged, for example with dairy products or other mediums which have a tendency to precipitate, which blockages cannot be removed by flushing. With this known shut-off valve the problem according to the object of the present invention, that is to improve the through-flow ` 2145119 of sensitive liquid mediums which have a tendency to precipitate, does not arise at all and this known shut-off valve is unsuitable for that purpose, for that matter.
A further drawback of these known shut-off valves is that their construction is too complicated, with a complicated housing for the bearing of the control spindle, the two sealing half shells for the ball and the additional side shells, which in turn are sealed against the sealing half shells by means of additional sealing elements, such as contact rings. It has become apparent that with sensitive liquid mediums, for example with dairy products, the formation of deposits near the two sealings cannot be avoided. Even when agressive cleaning agents are used such deposits are very difficult to remove and the required freedom from germs can hardly be achieved without using disinfectants, which constitute a burden to the environment.
In addition to this the housing is too complicated and furthermore a spherical valve of this kind with the comparatively hard half shells requires highly accurate and laborious machining with the closest tolerances in order to achieve an adequate sealing. Furthermore a likewise complicated compact sealing of the control spindle for the shut-off valve is required when this construction is used, since otherwise air may be sucked into the transport pipeline through the spindle sealing, in particular when the flow velocity of the medium to be transported is high, as the known half-shell sealings are indeed manufactured to close tolerances, but are not made gas pressure-tight.
The liquid transport of certain materials and substances which are sensitive to movement and temperature presents difficulties when this ball valve is used, however, for example in the case of the liquid transport of thixotropic materials, which tend to form lumps or deposits resulting from kinetic energy or when at rest. A major drawback is furthermore the fact that the passage is small in comparison with the ball size and that a great flow velocity is thus required for passing the same amount of material, which leads to strong turbulence. With dispersions this leads to disadvantageous deposition. In that case required through-flow of the medium is no longer guaranteed and this may result in serious disruption of the normal course of production. In addition to this a comparatively large, impractical construction requiring a lot of material is needed for the passage, which can only be small.
21~5119 From the prospectus of the firm of Neotecha AG, CH-8634 Hornbrechtikon a shut-off valve comprising a so-called C-cock is known, which already has two identical housing parts. As is the case with the usual ball valves, the C-ball cock retained between the two housing parts is retained and sealed on both sides in the axis of flow by only one non-readjustable annular ball seat and one ball ring respectively.
Consequently, in the open position of the C-cock the medium flows into the dead space thus formed, all around the C-cock, as far as the spindle seal at the material-free side of the C-shape between the two sealing rings (3a and 3b), whereby the formation of deposits around the C-cock cannot be avoided with products containing solids.
A further indication for the fact that the C-cock is not completely sealed can be derived from the technically highly complicated spindle seal, which is necessary with all ball valves. With the subiect matter of the invention such a complicated spindle seal is no longer necessary as a result of the complete sealing of the spherical closing means.
Consequently the sterility required for foodstuffs cannot be achieved with this known shut-off valve.
Otherwise this manner of sealing corresponds with the prior art with all the drawbacks described from which the present invention proceeds, namely to prevent this dead space in order to obtain a high degree of sterility and a better cleaning possibility.
In view of the above reasons these known shut-off valves are in many cases unsuitable for the transport of liquid foodstuffs, such as milk, in spite of the clean use of high-grade steel and the use of sealing material allowable for foodstuffs, since unfavourable temperatures and kinetic energy will unavoidably lead to the deposition of fats or the formation of butter in the valve housing.
It has become apparent that the cleaning of all shut-off valves of this known type by a mechanical process is very difficult without using solvents and cleaning agents which are harmful to the environment, whilst in the closed position of the shut-off valve this is altogether impossible. The use of agressive cleaning agents and disinfectants, which constitute a high burden to the environment, cannot be prevented thereby.
Furthermore, in many cases even the costly disassembly of such a known shut-off valve is required in order to clean the valve.
214~119 The object of the invention is therefore to develop a shut-off valve of the kind referred to in the introduction, whereby the above-described drawbacks are overcome. With a shut-off valve of this type the intrusion and being left behind of liquid mediums in dead spaces of the shut-off valve and the associated disadvantageous formation of deposits with dairy products and thixotropic materials must be prevented.
Furthermore it must be possible to clean such a shut-off valve perfectly from both sides by mechanical flushing in the closed position of the valve.
Another object of the invention is to simplify the costly manufacturing process of the shut-off valve, with complicated housing parts for the bearing of the spindle and the accurate spindle seals required for this purpose, for example, to reduce the number of separate parts and to improve the seals, whereby a quicker and simpler assembly and exchangeability of all parts subject to wear is ensured.
According to the invention this objective is accomplished by a shut-off valve of the kind referred to in the preamble and comprising the characterizing features of claim 1.
Because of its configuration, which is advantageous with regard to the through-flow, a shut-off valve comprising the above features enables a laminar flow of the medium, whereby also in the closed position a perfect mechanical cleaning in both directions of flow is possible. The spherical closing body with the fully enclosing, tolerance-free sealing ensures an optimum sealing not known so far and an easy control as a result of the floating bearing, whereby as a result of the advantageous constructional configuration comprising few parts no more disadvantageous dead spaces will be present.
Further advantageous embodiments of the invention are subject matter of the subclaims.
The invention will be explained in more detail by means of embodiments, wherein reference is made to the drawings.
Figure 1 is an exploded view of the shut-off valve.
Figure 2 shows a detail of the shut-off valve.
Figure 3 shows a further development of the sealing shells.
Figure 4 shows the shut-off valve of Figure 1 in assembled condition.
`- ` 2145119 In Figure 1 the shut-off valve according to the invention is illustrated in exploded view. The spherical closing body 1, illustrated on a larger scale in Figure 2, is on one side free from material, in the direction of the arrow 6, over the height 2 of the passage 3 and the corresponding width 4 of the passage, transversely to the axis 5 of the passage. The remaining outer wall of the closing body 1 makes up the sealing surface 7, which is aligned in closing position with respect to the axis of flow 8 in this Figure. A pivot pin 10 is provided on the closing body 1 in the axis of rotation 9, for opening and closing the shut-off valve in the direction of the arrow 12, with a square extension piece 16 projecting from the housing 11 for operating purposes, for example for a grip or for a mechanical coupling.
The pivot pins 10, 10' are provided with 0-rings 13, which engage in the recesses 14 of the housing 11 provided for this purpose. The pivot pin 10 is provided, in a manner known per se, with a switch toggle 15, which is loosely inserted in the closing body 1 and which is movable in the direction of the arrow 20. As a result of this a jamming-free bearing of the closing body 1 and the pivot pin 10 is achieved, as well as a low-friction operation of the square extension piece 16.
The opposite pivot pin 10' may be left out, if desired, since the closing body 1 is optimally guided in the fully enclosing tolerance-free soft sealing 17 and the switch toggle 15 cannot become detached from the closing body 1.
The sealing and bearing of the closing body 1 takes place via two identical sealing shells 17' and 17Z which, according to the degree of softness of the sealing material used, are fitted with a stainless steel bearing body 18 let down therein, as is apparent from Figure 3. A similar sealing shell 17' is already present in the housing part 11', into which the closing body may be inserted.
Pressed together in the assembled position the sealing shells 171 and 172 form an integral function and furthermore sealingly enclose the pivot pins 10 and 101 before the 0-rings 13. As is apparent from Figure 3 the sealing shells 17 may be integral with bearing extension pieces 19, which make it possible to realize the bearing as well as the sealing of the pivot pins 10 and 10' at the same time. The special advantage of this is that as a result it is no longer necessary to use 0-rings and/or other means for bearing and sealing the pivot pins, and that all processing measures required for this have become advantageously unnecessary.
The tolerance-free bearing of the closing body 1 in the soft sealing shells 17 makes it possible to realize a sealing which is that simple, since a gas-tight bearing of the closing body is thus ensured and no air can be sucked into the transport flow through the bearing of the pivot pins with a high transport velocity of the medium and the resulting sub-atmospheric pressure.
Furthermore the bearing and the sealing of the pivot pin 10 are simultaneously renewed in an advantageous manner, by the simple exchange of the sealing shells 17 for the closing body 1.
After the closing body 1 has been inserted into the housing part 11' fitted with the sealing shell 171, the housing part 112 with the sealing shell 17Z is placed on the closing body 1 and the two housing parts 11' and 112 are interconnected by means of screws 21. Thus the shut-off valve according to the invention, which consists of only three different parts, the housing part 11, the sealing shell 17 and the closing body 1 comprising the pivot pins, is ready for operation. Then the shut-off valve can be mounted in the intended pipeline or on a container by means of the threaded stub 22.
Instead of the threaded stub 22 the housing 11 may also be fitted with other usual or normalized connecting elements as a standard feature.
The invention relates to a shut-off valve for pipelines, in particular for liquid containers, comprising at least one closing body capable of pivoting through 90 and a passage provided transversely to the pivot axis for opening and closing the internal passage over its entire section, whereby said closing body is free fram material on one side near said passage, in a direction transversely to the longitudinal axis, and whereby said closing body has a so-called C-shape.
A great advantage of ball valve cocks of the known kind, which comprise passages for opening and closing the cock recessed transversely to the pivoting direction, whereby the internal passage is released over its entire section, in comparison with the known shut-off valves comprising hinged flaps is that in the open position of the valve a substantially laminar flow exhibiting little turbulence can be achieved.
Undesirable formation of deposits on the parts of the shut-off valve present within the passage is thus substantially prevented.
A major drawback of ball valves of this kind is, however, that in the closed position of the ball valve a residual amount of the liquid medium is left behind in the passage of the closing ball, and that a disadvantageous formation of deposits takes place at that location. It is not possible to remove this entrapped residual material, whilst it is furthermore not possible to clean the valve mechanically in the closed position of the ball valve.
From DE-OS 23 18 476 a rotary ball valve is known, which is U-shaped, that is free from material on one side, transversely to the longitudinal axis. In the case of nuclear water operation this configuration must make it possible to remove such a closing body from a shut-off valve welded in a pipeline. Because of the presence of the sealing ring let down into the ball segment, which only provides a sealing function, considerable dead spaces are formed beside the passage between the shut-off valve and the housing. Not only do these dead spaces generate a substantial amount of harmful turbulence, but in addition to this these dead spaces become clogged, for example with dairy products or other mediums which have a tendency to precipitate, which blockages cannot be removed by flushing. With this known shut-off valve the problem according to the object of the present invention, that is to improve the through-flow ` 2145119 of sensitive liquid mediums which have a tendency to precipitate, does not arise at all and this known shut-off valve is unsuitable for that purpose, for that matter.
A further drawback of these known shut-off valves is that their construction is too complicated, with a complicated housing for the bearing of the control spindle, the two sealing half shells for the ball and the additional side shells, which in turn are sealed against the sealing half shells by means of additional sealing elements, such as contact rings. It has become apparent that with sensitive liquid mediums, for example with dairy products, the formation of deposits near the two sealings cannot be avoided. Even when agressive cleaning agents are used such deposits are very difficult to remove and the required freedom from germs can hardly be achieved without using disinfectants, which constitute a burden to the environment.
In addition to this the housing is too complicated and furthermore a spherical valve of this kind with the comparatively hard half shells requires highly accurate and laborious machining with the closest tolerances in order to achieve an adequate sealing. Furthermore a likewise complicated compact sealing of the control spindle for the shut-off valve is required when this construction is used, since otherwise air may be sucked into the transport pipeline through the spindle sealing, in particular when the flow velocity of the medium to be transported is high, as the known half-shell sealings are indeed manufactured to close tolerances, but are not made gas pressure-tight.
The liquid transport of certain materials and substances which are sensitive to movement and temperature presents difficulties when this ball valve is used, however, for example in the case of the liquid transport of thixotropic materials, which tend to form lumps or deposits resulting from kinetic energy or when at rest. A major drawback is furthermore the fact that the passage is small in comparison with the ball size and that a great flow velocity is thus required for passing the same amount of material, which leads to strong turbulence. With dispersions this leads to disadvantageous deposition. In that case required through-flow of the medium is no longer guaranteed and this may result in serious disruption of the normal course of production. In addition to this a comparatively large, impractical construction requiring a lot of material is needed for the passage, which can only be small.
21~5119 From the prospectus of the firm of Neotecha AG, CH-8634 Hornbrechtikon a shut-off valve comprising a so-called C-cock is known, which already has two identical housing parts. As is the case with the usual ball valves, the C-ball cock retained between the two housing parts is retained and sealed on both sides in the axis of flow by only one non-readjustable annular ball seat and one ball ring respectively.
Consequently, in the open position of the C-cock the medium flows into the dead space thus formed, all around the C-cock, as far as the spindle seal at the material-free side of the C-shape between the two sealing rings (3a and 3b), whereby the formation of deposits around the C-cock cannot be avoided with products containing solids.
A further indication for the fact that the C-cock is not completely sealed can be derived from the technically highly complicated spindle seal, which is necessary with all ball valves. With the subiect matter of the invention such a complicated spindle seal is no longer necessary as a result of the complete sealing of the spherical closing means.
Consequently the sterility required for foodstuffs cannot be achieved with this known shut-off valve.
Otherwise this manner of sealing corresponds with the prior art with all the drawbacks described from which the present invention proceeds, namely to prevent this dead space in order to obtain a high degree of sterility and a better cleaning possibility.
In view of the above reasons these known shut-off valves are in many cases unsuitable for the transport of liquid foodstuffs, such as milk, in spite of the clean use of high-grade steel and the use of sealing material allowable for foodstuffs, since unfavourable temperatures and kinetic energy will unavoidably lead to the deposition of fats or the formation of butter in the valve housing.
It has become apparent that the cleaning of all shut-off valves of this known type by a mechanical process is very difficult without using solvents and cleaning agents which are harmful to the environment, whilst in the closed position of the shut-off valve this is altogether impossible. The use of agressive cleaning agents and disinfectants, which constitute a high burden to the environment, cannot be prevented thereby.
Furthermore, in many cases even the costly disassembly of such a known shut-off valve is required in order to clean the valve.
214~119 The object of the invention is therefore to develop a shut-off valve of the kind referred to in the introduction, whereby the above-described drawbacks are overcome. With a shut-off valve of this type the intrusion and being left behind of liquid mediums in dead spaces of the shut-off valve and the associated disadvantageous formation of deposits with dairy products and thixotropic materials must be prevented.
Furthermore it must be possible to clean such a shut-off valve perfectly from both sides by mechanical flushing in the closed position of the valve.
Another object of the invention is to simplify the costly manufacturing process of the shut-off valve, with complicated housing parts for the bearing of the spindle and the accurate spindle seals required for this purpose, for example, to reduce the number of separate parts and to improve the seals, whereby a quicker and simpler assembly and exchangeability of all parts subject to wear is ensured.
According to the invention this objective is accomplished by a shut-off valve of the kind referred to in the preamble and comprising the characterizing features of claim 1.
Because of its configuration, which is advantageous with regard to the through-flow, a shut-off valve comprising the above features enables a laminar flow of the medium, whereby also in the closed position a perfect mechanical cleaning in both directions of flow is possible. The spherical closing body with the fully enclosing, tolerance-free sealing ensures an optimum sealing not known so far and an easy control as a result of the floating bearing, whereby as a result of the advantageous constructional configuration comprising few parts no more disadvantageous dead spaces will be present.
Further advantageous embodiments of the invention are subject matter of the subclaims.
The invention will be explained in more detail by means of embodiments, wherein reference is made to the drawings.
Figure 1 is an exploded view of the shut-off valve.
Figure 2 shows a detail of the shut-off valve.
Figure 3 shows a further development of the sealing shells.
Figure 4 shows the shut-off valve of Figure 1 in assembled condition.
`- ` 2145119 In Figure 1 the shut-off valve according to the invention is illustrated in exploded view. The spherical closing body 1, illustrated on a larger scale in Figure 2, is on one side free from material, in the direction of the arrow 6, over the height 2 of the passage 3 and the corresponding width 4 of the passage, transversely to the axis 5 of the passage. The remaining outer wall of the closing body 1 makes up the sealing surface 7, which is aligned in closing position with respect to the axis of flow 8 in this Figure. A pivot pin 10 is provided on the closing body 1 in the axis of rotation 9, for opening and closing the shut-off valve in the direction of the arrow 12, with a square extension piece 16 projecting from the housing 11 for operating purposes, for example for a grip or for a mechanical coupling.
The pivot pins 10, 10' are provided with 0-rings 13, which engage in the recesses 14 of the housing 11 provided for this purpose. The pivot pin 10 is provided, in a manner known per se, with a switch toggle 15, which is loosely inserted in the closing body 1 and which is movable in the direction of the arrow 20. As a result of this a jamming-free bearing of the closing body 1 and the pivot pin 10 is achieved, as well as a low-friction operation of the square extension piece 16.
The opposite pivot pin 10' may be left out, if desired, since the closing body 1 is optimally guided in the fully enclosing tolerance-free soft sealing 17 and the switch toggle 15 cannot become detached from the closing body 1.
The sealing and bearing of the closing body 1 takes place via two identical sealing shells 17' and 17Z which, according to the degree of softness of the sealing material used, are fitted with a stainless steel bearing body 18 let down therein, as is apparent from Figure 3. A similar sealing shell 17' is already present in the housing part 11', into which the closing body may be inserted.
Pressed together in the assembled position the sealing shells 171 and 172 form an integral function and furthermore sealingly enclose the pivot pins 10 and 101 before the 0-rings 13. As is apparent from Figure 3 the sealing shells 17 may be integral with bearing extension pieces 19, which make it possible to realize the bearing as well as the sealing of the pivot pins 10 and 10' at the same time. The special advantage of this is that as a result it is no longer necessary to use 0-rings and/or other means for bearing and sealing the pivot pins, and that all processing measures required for this have become advantageously unnecessary.
The tolerance-free bearing of the closing body 1 in the soft sealing shells 17 makes it possible to realize a sealing which is that simple, since a gas-tight bearing of the closing body is thus ensured and no air can be sucked into the transport flow through the bearing of the pivot pins with a high transport velocity of the medium and the resulting sub-atmospheric pressure.
Furthermore the bearing and the sealing of the pivot pin 10 are simultaneously renewed in an advantageous manner, by the simple exchange of the sealing shells 17 for the closing body 1.
After the closing body 1 has been inserted into the housing part 11' fitted with the sealing shell 171, the housing part 112 with the sealing shell 17Z is placed on the closing body 1 and the two housing parts 11' and 112 are interconnected by means of screws 21. Thus the shut-off valve according to the invention, which consists of only three different parts, the housing part 11, the sealing shell 17 and the closing body 1 comprising the pivot pins, is ready for operation. Then the shut-off valve can be mounted in the intended pipeline or on a container by means of the threaded stub 22.
Instead of the threaded stub 22 the housing 11 may also be fitted with other usual or normalized connecting elements as a standard feature.
Claims (12)
1. A shut-off valve for pipelines, in particular for liquid containers, comprising at least one closing body capable of pivoting through 90° and a passage provided transversely to the pivot axis for opening and closing the internal passage over its entire section, whereby said closing body is free from material on one side near said passage, in a direction transversely to the longitudinal axis, characterized in that said spherical closing body (1) is fully enclosed by the embracing sealing shells (17) as far as the passage (3) of the axis of flow and is slidingly journalled between said sealing shells, in such a manner that the remaining outer wall of the closing body (1) directed towards the opposite side only forms the sealing closing surface (7) of the internal passage (3) in the axis of flow (8) and that said sealing shells (17) are enclosed by a valve housing (11) consisting of two identical, radially formed housing parts (111, 112) and can be interconnected by fastening means known per se, for example by means of bolts (21).
2. A shut-off valve according to claim 1, characterized in that said sealing shells (17) fully enclosing said closing body (1) and acting as a unit in the assembled condition consist of two identical half sealing shells (171, 172).
3. A shut-off valve according to claims 1 and 2, characterized in that said sealing shells (17) are made of a sof elastic material, such as plastic material or rubber, for example silicone natural rubber (VQM).
4. A shut-off valve according to claims 1 - 3, characterized in that said sealing shells (17) are provided with an internal rigid bearing body (18), for example in the form of a ring of a high-grade steel.
5. A shut-off valve according to claims 1 - 4, characterized in that a pivot pin (10) passed outside through the valve housing (11) in the direction of the axis of rotation (9) is mounted on at least one side of the closing body (1).
6. A shut-off valve according to claim 1 - 5, characterized in that the pivot pin(s) (10, 101) is ( are) provided with means guiding and/or sealing the spindle, for example in the shape of O-rings (13) fitted into the recess(es) (14).
7. A shut-off valve according to claims 1 - 6, characterized in that said means guiding and/or sealing the spindle, which are intended to receive the pivot pin (10, 101), are formed with correspondingly manufactured bearing extension pieces as a result of the expanded, one-piece configuration of the sealing shell (17).
8. A shut-off valve according to claims 1 - 7, characterized in that the spherical closing body (1) is connected with a switch toggle (15) of the pivot pin (10) which is loosely fitted into a corresponding recess and which is movable in the direction of the arrow (20).
9. A shut-off valve according to claims 1 - 8, characterized in that the pivot pin (10) is provided with a connecting part projecting from the housing, for example a square extension piece (16)
10. A shut-off valve according to claims 1 - 9, characterized in that said closing body (1) is made of a corrosion-resistant steel, a high-grade steel, for example V 4A.
11. A shut-off valve according to claims 1 - 10, characterized in that said closing body (1) is made of a ceramic material.
12. A shut-off valve according to claims 1 - 11, characterized in that said valve housing (11) is made of a high-grade steel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4409796.4 | 1994-03-22 | ||
| DE19944409796 DE4409796C1 (en) | 1994-03-22 | 1994-03-22 | Shut-off valve for pipe lines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2145119A1 true CA2145119A1 (en) | 1995-09-23 |
Family
ID=6513486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2145119 Abandoned CA2145119A1 (en) | 1994-03-22 | 1995-03-21 | Shut-off valve for pipelines, in particular for liquid containers |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0674127A1 (en) |
| JP (1) | JPH0842721A (en) |
| CA (1) | CA2145119A1 (en) |
| DE (1) | DE4409796C1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018103056A1 (en) * | 2016-12-09 | 2018-06-14 | 卓金星 | Ball valve for fermentation tank and fermentation tank having ball valve |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19539045C2 (en) * | 1995-10-20 | 1999-08-12 | Centra Buerkle Gmbh & Co | Valve |
| DE19630001A1 (en) * | 1996-07-25 | 1998-01-29 | Janhsen Jakobus | Shut-off valve has conical plug which swivels within a matching pipe aperture |
| DE19633793C1 (en) * | 1996-08-22 | 1998-04-23 | K & H Armaturen Gmbh | Stop valve for liquid container |
| DE19726143C1 (en) * | 1996-08-22 | 1999-02-18 | K & H Armaturen Gmbh | Stop valve for pipelines, in particular, for liquid containers |
| ID17883A (en) * | 1996-08-27 | 1998-02-05 | Low Han Sin | VALVES OR TAPES AND METHODS TO PRODUCE ITS PARTS |
| DE19701213C1 (en) * | 1997-01-16 | 1998-10-01 | Goldsweer Karl W | Shut-off valve for pipes |
| DE20310203U1 (en) * | 2003-06-26 | 2004-11-04 | Roman Seliger Gmbh | Ball valve with open flow channel for use in e.g. dry clutches hast wo valve elements with passages and end apertures defining non-linear flow channel of constant diameter |
| KR101273212B1 (en) * | 2011-05-03 | 2013-06-12 | 주식회사 현대케피코 | Engine oil level gage for vehicles |
| DE202020104887U1 (en) | 2020-08-24 | 2020-09-10 | GULBINAT Systemtechnik GmbH & Co. KG | Ball valve |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE7333464U (en) * | 1974-11-28 | Isola Werke Ag | Fitting, in particular shut-off device for pipeline systems | |
| DE1217157B (en) * | 1961-09-15 | 1966-05-18 | Whitey Research Tool Co | Valve with rotatable valve plug |
| DE1245238B (en) * | 1963-03-18 | 1967-07-20 | Crane Co | Ball valve |
| CA982104A (en) * | 1972-08-07 | 1976-01-20 | Brunswick Corporation | Rotary plug valve |
| DE2506386A1 (en) * | 1975-02-15 | 1976-08-26 | Plessey Handel Investment Ag | Stopcock with tubular housing - has spring loaded taper plug with seals at both ends |
| US4177832A (en) * | 1977-07-11 | 1979-12-11 | Lee Industries, Inc. | Inline ball valve |
| US4552335A (en) * | 1983-11-03 | 1985-11-12 | Vapor Corporation | Ball valve |
| DE3512227A1 (en) * | 1985-04-03 | 1986-10-16 | Rudolf Ing. Wien Zelenka | Shut-off cock |
| DE3545547A1 (en) * | 1985-12-21 | 1987-07-02 | B & S Metalpraecis Gmbh | Ball cock as a shut-off and regulating fitting for flows of gaseous and liquid substances, particularly those containing abrasive solids |
| DE3710858A1 (en) * | 1987-04-01 | 1988-10-20 | Ecker Gmbh Maschbau | Ball valve |
| DE3744452A1 (en) * | 1987-12-29 | 1989-07-13 | Burgmann Dichtungswerk Feodor | BALL VALVE |
-
1994
- 1994-03-22 DE DE19944409796 patent/DE4409796C1/en not_active Expired - Fee Related
-
1995
- 1995-03-17 EP EP95200647A patent/EP0674127A1/en not_active Withdrawn
- 1995-03-21 CA CA 2145119 patent/CA2145119A1/en not_active Abandoned
- 1995-03-22 JP JP6323695A patent/JPH0842721A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018103056A1 (en) * | 2016-12-09 | 2018-06-14 | 卓金星 | Ball valve for fermentation tank and fermentation tank having ball valve |
| US11174951B2 (en) | 2016-12-09 | 2021-11-16 | Chin-Hsing CHUO | Ball valve for fermentation tank and fermentation tank including the same |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4409796C1 (en) | 1995-06-29 |
| JPH0842721A (en) | 1996-02-16 |
| EP0674127A1 (en) | 1995-09-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |