EP1008812B1 - Flow-through member for an expansion tank - Google Patents
Flow-through member for an expansion tank Download PDFInfo
- Publication number
- EP1008812B1 EP1008812B1 EP19990204167 EP99204167A EP1008812B1 EP 1008812 B1 EP1008812 B1 EP 1008812B1 EP 19990204167 EP19990204167 EP 19990204167 EP 99204167 A EP99204167 A EP 99204167A EP 1008812 B1 EP1008812 B1 EP 1008812B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flow
- guidance element
- basic part
- directing
- expansion tank
- 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 - Lifetime
Links
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 25
- 210000002445 nipple Anatomy 0.000 description 18
- 125000006850 spacer group Chemical group 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
- F24D3/1008—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system expansion tanks
- F24D3/1041—Flow-through
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
- F24D3/1008—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system expansion tanks
Definitions
- the invention relates to a flow-through member for an expansion tank according to the preamble of claim 1.
- a flow-through member of this nature is known, for example, from DE 296 21 353-U.
- the flow-through member When secured in the connecting passage, the flow-through member forms at least two passages in the connecting passage of the expansion tank.
- a through-flow expansion tank which is formed in this way is connected to a pipe of a water supply system.
- the flow-through member projects through a connection socket of the connection piece, one end of the flow-through member extending all the way into a flow passage in the water supply system.
- An inlet opening and an outlet opening are arranged in the corresponding end, which openings are on opposite sides of the end of the flow-through member, with their axes substantially parallel to the centre axis of the flow passage.
- a drawback of the known flow-through member is that it is extremely complex and is therefore expensive to produce.
- Another drawback of the known flow-through member is that it has to be positioned in a predetermined orientation in the connection piece so that it has the proper orientation in the flow passage of the water supply system.
- the object of the present invention is to provide a flow-through member which does not have the abovementioned drawbacks.
- the flow-through member according to the invention is relatively simple and therefore unexpensive.
- the orientation of the flow-guidance element can be independent of the orientation of the basic part.
- the invention also relates to an expansion tank provided with a flow-through member according to the invention.
- the flow-through member 1 which is shown in Figure 1 comprises a basic part 1a with a cylindrical sleeve 4 which is preferably circular in cross section.
- One end of the cylindrical sleeve 4 has a flange edge 5, by means of which the basic part 1a can bear against an internal surface of an expansion tank 3 (cf. Figure 2).
- That end of the cylindrical sleeve 4 which is provided with the flange edge 5 forms a first connection end of the flow-through member 1, by means of which the flow-through member 1 can be placed in communication with a liquid-holding space of the expansion tank 3 in which the flow-through member 1 is mounted.
- the opposite end of the flow-through member 1 forms a second connection end, by means of which the flow-through member 1 can be placed in communication with a flow passage of a water supply system.
- the outside contour of the cylindrical sleeve 4 substantially corresponds to the inside contour of the connection nipple 2 of the expansion tank 3 in question, the connection nipple 2 defining a connecting passage of the expansion tank 3.
- the cylindrical sleeve 4 can be fitted into the connection nipple 2, and friction between an inner surface of the connection nipple 2 and an outer surface of the cylindrical sleeve 4 brings about coupling between the cylindrical sleeve 4 and the connection nipple 2.
- the coupling can be made stronger by arranging elastically deformable clamping edges on the outer circumference of the cylindrical sleeve 4, so that the cylindrical sleeve 4 can be fixed immovably in the connection nipple by means of a press-fit.
- the cylindrical sleeve 4 preferably extends from the inner surface of the expansion tank 3 to an outer edge of the connection nipple 2.
- the basic part 1a furthermore comprises an inner sleeve 7 which is preferably arranged concentrically in the cylindrical sleeve 4. Spacers 6 ensure that the inner sleeve 7 is positioned concentrically in the cylindrical sleeve 4.
- the space inside the inner sleeve 7 forms at least part of a first flow-through passage 30, and the space between the cylindrical sleeve 4 and the inner sleeve 7 forms a second flow-through passage 40.
- the inner sleeve 7 preferably extends from the first connection end of the flow-through member 1 to the plane of the outer edge of the connection nipple 2.
- a preferably tubular flow-guidance element 14 is arranged in the inner sleeve 7.
- the flow-guidance element 14 is arranged rotatably in the inner sleeve 7.
- the inner sleeve 7 has an internal diameter which is stepped, so that a stop 19 is formed, defining the maximum depth for the flow-guidance element 14 to be placed in the inner sleeve 7.
- an encircling rib 15 is arranged on the outer circumference of the flow-guidance element 14, in the vicinity of that end of the flow-guidance element 14 which has been pushed into the inner sleeve 7.
- An associated groove 16, which interacts with the rib 15 in order to lock the flow-guidance element 14 in the inner sleeve 7, is arranged in the inner wall of the inner sleeve 7.
- the dimensions of the rib 15 and the groove 16 allow a rotary movement of the flow-guidance element 14.
- the rib 15 may also be arranged on the inner wall of the inner sleeve 7, with the associated groove 16 on the outer circumference of the flow-guidance element 14.
- the flow-guidance element 14 may have an incision which extends from the end which has been pushed into the inner sleeve 7, over a predetermined distance in the longitudinal direction of the flow-guidance element 14.
- the flow-guidance element 14 is fitted into the inner sleeve 7 from the side of the second connection end of the flow-through member 1.
- two or more grooves 16 are formed in the inner wall of the inner sleeve 7.
- the free end of the flow-guidance element 14 lies at a distance from the basic part 1a.
- an inlet opening 8 is arranged on the circumference of the tubular flow-guidance element 14.
- the flow-guidance element 14 has a bended end wall which also defines a part of the contour of the inlet opening 8 (fig. 1).
- the inlet opening allows water to flow into the flow-guidance element 14, the direction of flow as the water flows in forming an angle with the centre axis of the flow-guidance element 14.
- the free end of the flow-guidance element 14 is shaped in such a way that a liquid which is flowing inwards through the inlet opening 8 at least during operation flows to the first connection end of the flow-through member 1 via the first flow-through passage 30.
- an expansion tank which is provided with a flow-through member 1 according to the invention is used in a water supply system
- the expansion tank is connected to the water supply system in such a manner that the first connection end of the flow-through member 1 is in communication with a flow passage in the water supply system.
- the flow-guidance element 14 projects so far beyond the basic part 1a that the free end which has the inlet opening 8 is located in the flow passage in question, all this in such a manner that the outlet opening can direct itself towards the upstream direction of a flow which is present in the flow passage at least during operation.
- Figure 2 shows part of the expansion tank 3 (in cross section) in which a flow-through member 1 according to the invention is arranged.
- the basic part 1a is pressed into the connection nipple 2 of the expansion tank 3 so far that the flange edge 5 bears against the inner wall of the expansion tank 3.
- connection nipple 2 is provided with an external screw thread, so that the expansion tank 3 can be screwed into a suitable connecting means of a water supply system.
- the expansion tank shown in Figure 2 is connected to the water supply system with the aid of a conventional T-piece 9.
- the T-piece 9 has a first connection sleeve 10 and a second connection sleeve 11 which are coaxial and between which a main flow passage 50 is formed.
- the T-piece 9 also has a connection socket 12, the centre axis of which is preferably perpendicular to the common centre axis of the first connection sleeve 10 and the second connection sleeve 11.
- the connection socket 12 is provided with an internal screw thread, by means of which the T-piece 9 can be screwed onto the connection nipple 2, which is provided with an external screw thread, of the expansion tank 3.
- the free end of the flow-guidance element 14 which has the inlet opening 8 is situated between the first connection sleeve 10 and the second connection sleeve 11, in the main flow passage 50.
- the free end of the flow-guidance element 14 is preferably located substantially at the level of the common centre axis of the first connection sleeve 10 and the second connection sleeve 11. In the position shown in Figure 2, the inlet opening 8 faces towards the first connection sleeve 10.
- a surface which is defined by the contour of the inlet opening 8 has a projected surface which lies on a plane which is perpendicular to the centre axis of the flow passage 50.
- the thrust pressure causes an increase in pressure in the first flow-through passage 30, while in the downstream direction of the main flow through the T-piece 9 the pressure of the water is reduced with respect to the flow-guidance element 14.
- a directing element 18 is arranged on the outer surface of the flow-guidance element 14, in the vicinity of the free end.
- the water exerts a force which is directed in the direction of flow on the directing element 18. If the surface of the directing element 18 forms an angle with the direction of flow of the flowing water, the force which the water exerts on the directing element 18 causes a moment force, with the result that the flow-guidance element 14 rotates until the surface of the directing element 18 substantially coincides with the direction of flow.
- the directing element 18 thus acts as a vane.
- the expansion tank 3 having the flow-through member 1 according to the invention is suitable for any system of pipes which has a connection socket 12 with dimensions which corresponds to the dimensions of the connection nipple 2 of the expansion tank 3.
- the connection socket 12 may also, for example, be welded directly onto a pipe in the system of pipes.
- the expansion tank 3 may also be connected to the system of pipes in other ways, for example with the aid of a nut.
- the cylindrical sleeve 4 and the inner sleeve 7 are concentric in the preferred embodiment illustrated in Figures 1 and 2.
- the inner sleeve 7 is positioned in the cylindrical sleeve 4 with the aid of four spacers 6.
- the number of spacers is preferably 3 or more, so that the inner sleeve 7 is positioned in the cylindrical sleeve 4 in a stable, vibration-free manner.
- the cylindrical sleeve 4, the spacers 6 and the inner sleeve 7 form a single unit.
- Figures 3 and 4 show two variants of the flow-through member 1, which can be arranged in the connection nipple 2 of the expansion tank 3 if it has not already been provided with the flow-through member 1 during assembly.
- the flow-through member 1 shown in Figure 3 corresponds to the flow-through member 1 shown in Figure 2, except that the flange edge 5 has been removed from the basic part 1a and the basic part 1a is provided with a flange 21 on the side of the second connection end of the flow-through member 1.
- the flange 21 bears against the outer edge of the connection nipple 2. If a suitable material is selected, the flange 21 can be used as a sealing ring between the connection nipple 2 and the connection socket 12.
- the inner sleeve 7 has been eliminated and grooves 16 are arranged in the spacers 6, in which grooves the rib 15 of the flow-guidance element 14 can be positioned.
- the flow-guidance element 14 extends at least as far as the first connection end of the flow-through element 1. If desired, openings may be formed in that end of the flow-guidance element 14 which is located in the vicinity of the first connection end, through which openings water can flow in the radial direction.
- FIG. 5 shows the flow-through member 1 shown in Figure 1, with a V-shaped directing element 18 arranged on the flow-guidance element 14. Consequently, the flow-guidance element 14 will rotate into the correct position more quickly. Moreover, the V-shaped directing element 18 causes downstream turbulence in the water, resulting in a greater difference between the pressure in the first flow-through passage 30 and the pressure in the main flow passage 50 downstream of the flow-guidance element 14. This has a beneficial effect on the flow through the expansion tank 3.
- the flow-through member according to the invention is made from a material which is simple to process, such as a plastics material.
- the flow-through member may also be made from any other material which is suitable for use in a water supply system, such as stainless steel or brass.
- a flow-through member 1 of this nature can be arranged in an expansion tank which has already been assembled.
- first flow-through passage 30 and the second flow-through passage 40 may be eccentric with respect to one another.
- the basic part 1a may comprise a solid part with a first hole in which the flow-guidance part 14 can be arranged, and a plurality of drilled holes with a smaller diameter than the diameter of the first hole, in order to allow water flowing through the first hole to flow back.
- the inlet opening 8 and the directing vane 18 are arranged in or on a separate element which is positioned rotatably over an axial opening at the free end of the flow-guidance element 14.
- the flow-guidance element 14 may be provided, on the side of the inlet opening 8, with a projecting edge which is perpendicular to the outer circumference and closes off part of the second flow-through passage 40.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pipe Accessories (AREA)
- Devices For Dispensing Beverages (AREA)
- Joints Allowing Movement (AREA)
- Sanitary Device For Flush Toilet (AREA)
Description
- The invention relates to a flow-through member for an expansion tank according to the preamble of
claim 1. - A flow-through member of this nature is known, for example, from DE 296 21 353-U. When secured in the connecting passage, the flow-through member forms at least two passages in the connecting passage of the expansion tank. With the aid of a conventional connection piece, a through-flow expansion tank which is formed in this way is connected to a pipe of a water supply system. The flow-through member projects through a connection socket of the connection piece, one end of the flow-through member extending all the way into a flow passage in the water supply system. An inlet opening and an outlet opening are arranged in the corresponding end, which openings are on opposite sides of the end of the flow-through member, with their axes substantially parallel to the centre axis of the flow passage.
- A drawback of the known flow-through member is that it is extremely complex and is therefore expensive to produce.
- Another drawback of the known flow-through member is that it has to be positioned in a predetermined orientation in the connection piece so that it has the proper orientation in the flow passage of the water supply system.
- The object of the present invention is to provide a flow-through member which does not have the abovementioned drawbacks.
- This object is achieved with a flow-through member according to
claim 1. - The flow-through member according to the invention is relatively simple and therefore unexpensive. The orientation of the flow-guidance element can be independent of the orientation of the basic part.
- The invention also relates to an expansion tank provided with a flow-through member according to the invention.
- The invention will be explained in the following description of preferred embodiments of a flow-through element according to the invention, with reference to the appended drawing, in which:
- Figure 1 shows a cross-sectional view of a preferred embodiment of a flow-through member,
- Figure 2 shows a cross-sectional view of the flow-through member shown in Figure 1, which is arranged in a connection nipple of an expansion tank which is connected to a water supply system,
- Figure 3 shows a cross-sectional view of a flow-through member which can be fitted into an expansion tank from the outside,
- Figure 4 shows a cross-sectional view of a flow-through member without an inner sleeve, and
- Figure 5 shows a plan view of a flow-through member with a V-shaped directing element.
-
- The flow-through
member 1 which is shown in Figure 1 comprises a basic part 1a with acylindrical sleeve 4 which is preferably circular in cross section. One end of thecylindrical sleeve 4 has aflange edge 5, by means of which the basic part 1a can bear against an internal surface of an expansion tank 3 (cf. Figure 2). That end of thecylindrical sleeve 4 which is provided with theflange edge 5 forms a first connection end of the flow-throughmember 1, by means of which the flow-throughmember 1 can be placed in communication with a liquid-holding space of theexpansion tank 3 in which the flow-throughmember 1 is mounted. The opposite end of the flow-throughmember 1 forms a second connection end, by means of which the flow-throughmember 1 can be placed in communication with a flow passage of a water supply system. - The outside contour of the
cylindrical sleeve 4 substantially corresponds to the inside contour of theconnection nipple 2 of theexpansion tank 3 in question, theconnection nipple 2 defining a connecting passage of theexpansion tank 3. Thecylindrical sleeve 4 can be fitted into theconnection nipple 2, and friction between an inner surface of theconnection nipple 2 and an outer surface of thecylindrical sleeve 4 brings about coupling between thecylindrical sleeve 4 and theconnection nipple 2. The coupling can be made stronger by arranging elastically deformable clamping edges on the outer circumference of thecylindrical sleeve 4, so that thecylindrical sleeve 4 can be fixed immovably in the connection nipple by means of a press-fit. Thecylindrical sleeve 4 preferably extends from the inner surface of theexpansion tank 3 to an outer edge of theconnection nipple 2. - The basic part 1a furthermore comprises an inner sleeve 7 which is preferably arranged concentrically in the
cylindrical sleeve 4.Spacers 6 ensure that the inner sleeve 7 is positioned concentrically in thecylindrical sleeve 4. - The space inside the inner sleeve 7 forms at least part of a first flow-through passage 30, and the space between the
cylindrical sleeve 4 and the inner sleeve 7 forms a second flow-throughpassage 40. - The inner sleeve 7 preferably extends from the first connection end of the flow-through
member 1 to the plane of the outer edge of theconnection nipple 2. - A preferably tubular flow-
guidance element 14 is arranged in the inner sleeve 7. In the preferred embodiment of the flow-through member according to the invention which is illustrated, the flow-guidance element 14 is arranged rotatably in the inner sleeve 7. The inner sleeve 7 has an internal diameter which is stepped, so that astop 19 is formed, defining the maximum depth for the flow-guidance element 14 to be placed in the inner sleeve 7. To prevent the flow-guidance element 14 from being able to slide out of the inner sleeve 7, an encircling rib 15 is arranged on the outer circumference of the flow-guidance element 14, in the vicinity of that end of the flow-guidance element 14 which has been pushed into the inner sleeve 7. Anassociated groove 16, which interacts with the rib 15 in order to lock the flow-guidance element 14 in the inner sleeve 7, is arranged in the inner wall of the inner sleeve 7. The dimensions of the rib 15 and thegroove 16 allow a rotary movement of the flow-guidance element 14. Obviously, the rib 15 may also be arranged on the inner wall of the inner sleeve 7, with the associatedgroove 16 on the outer circumference of the flow-guidance element 14. - To allow elastic deformation of the flow-
guidance element 14 when it is arranged in the inner sleeve 7, the flow-guidance element 14 may have an incision which extends from the end which has been pushed into the inner sleeve 7, over a predetermined distance in the longitudinal direction of the flow-guidance element 14. The flow-guidance element 14 is fitted into the inner sleeve 7 from the side of the second connection end of the flow-throughmember 1. - Preferably, two or
more grooves 16 are formed in the inner wall of the inner sleeve 7. In this way, it is possible to adapt the distance by which the flow-guidance element 14 extends outside the basic part 1a to a connecting member which is used to connect the expansion tank in which the flow-throughmember 1 is arranged to the water supply system. The free end of the flow-guidance element 14 lies at a distance from the basic part 1a. At the free end, an inlet opening 8 is arranged on the circumference of the tubular flow-guidance element 14. At the free end the flow-guidance element 14 has a bended end wall which also defines a part of the contour of the inlet opening 8 (fig. 1). The inlet opening allows water to flow into the flow-guidance element 14, the direction of flow as the water flows in forming an angle with the centre axis of the flow-guidance element 14. The free end of the flow-guidance element 14 is shaped in such a way that a liquid which is flowing inwards through the inlet opening 8 at least during operation flows to the first connection end of the flow-throughmember 1 via the first flow-through passage 30. - If an expansion tank which is provided with a flow-through
member 1 according to the invention is used in a water supply system, the expansion tank is connected to the water supply system in such a manner that the first connection end of the flow-throughmember 1 is in communication with a flow passage in the water supply system. The flow-guidance element 14 projects so far beyond the basic part 1a that the free end which has the inlet opening 8 is located in the flow passage in question, all this in such a manner that the outlet opening can direct itself towards the upstream direction of a flow which is present in the flow passage at least during operation. - Figure 2 shows part of the expansion tank 3 (in cross section) in which a flow-through
member 1 according to the invention is arranged. During assembly of theexpansion tank 3, the basic part 1a is pressed into theconnection nipple 2 of theexpansion tank 3 so far that theflange edge 5 bears against the inner wall of theexpansion tank 3. - The
connection nipple 2 is provided with an external screw thread, so that theexpansion tank 3 can be screwed into a suitable connecting means of a water supply system. - The expansion tank shown in Figure 2 is connected to the water supply system with the aid of a conventional T-piece 9. The T-piece 9 has a
first connection sleeve 10 and asecond connection sleeve 11 which are coaxial and between which amain flow passage 50 is formed. The T-piece 9 also has aconnection socket 12, the centre axis of which is preferably perpendicular to the common centre axis of thefirst connection sleeve 10 and thesecond connection sleeve 11. Moreover, theconnection socket 12 is provided with an internal screw thread, by means of which the T-piece 9 can be screwed onto theconnection nipple 2, which is provided with an external screw thread, of theexpansion tank 3. - When the T-piece 9 has been screwed on to the
connection nipple 2, the free end of the flow-guidance element 14 which has the inlet opening 8 is situated between thefirst connection sleeve 10 and thesecond connection sleeve 11, in themain flow passage 50. The free end of the flow-guidance element 14 is preferably located substantially at the level of the common centre axis of thefirst connection sleeve 10 and thesecond connection sleeve 11. In the position shown in Figure 2, the inlet opening 8 faces towards thefirst connection sleeve 10. - If water flows from the first connection sleeve 10, via the
main flow passage 50, towards thesecond connection sleeve 11, at least some of the water will flow through the inlet opening 8 in the flow-guidance element 14 and will be diverted towards theexpansion tank 3. To achieve this effect, a surface which is defined by the contour of the inlet opening 8 has a projected surface which lies on a plane which is perpendicular to the centre axis of theflow passage 50. The thrust pressure causes an increase in pressure in the first flow-through passage 30, while in the downstream direction of the main flow through the T-piece 9 the pressure of the water is reduced with respect to the flow-guidance element 14. This results in flow from the first flow-through passage 30, via anaxial opening 17 in the inner sleeve 7, at the first connection end of the flow-throughmember 1, through the second flow-throughpassage 40 to themain flow passage 50. At the level of theflange edge 5, the water flowing out of theaxial opening 17 flows radially outwards and then back through the second flow-throughpassage 40 towards theflow passage 50. - In order to ensure that the flow-
guidance element 14 is positioned correctly, with the inlet opening 8 facing upstream, a directingelement 18 is arranged on the outer surface of the flow-guidance element 14, in the vicinity of the free end. When water flows past the directingelement 18, the water exerts a force which is directed in the direction of flow on the directingelement 18. If the surface of the directingelement 18 forms an angle with the direction of flow of the flowing water, the force which the water exerts on the directingelement 18 causes a moment force, with the result that the flow-guidance element 14 rotates until the surface of the directingelement 18 substantially coincides with the direction of flow. The directingelement 18 thus acts as a vane. - The
expansion tank 3 having the flow-throughmember 1 according to the invention is suitable for any system of pipes which has aconnection socket 12 with dimensions which corresponds to the dimensions of theconnection nipple 2 of theexpansion tank 3. Theconnection socket 12 may also, for example, be welded directly onto a pipe in the system of pipes. Obviously, theexpansion tank 3 may also be connected to the system of pipes in other ways, for example with the aid of a nut. - The
cylindrical sleeve 4 and the inner sleeve 7 are concentric in the preferred embodiment illustrated in Figures 1 and 2. The inner sleeve 7 is positioned in thecylindrical sleeve 4 with the aid of fourspacers 6. The number of spacers is preferably 3 or more, so that the inner sleeve 7 is positioned in thecylindrical sleeve 4 in a stable, vibration-free manner. Preferably, thecylindrical sleeve 4, thespacers 6 and the inner sleeve 7 form a single unit. - Figures 3 and 4 show two variants of the flow-through
member 1, which can be arranged in theconnection nipple 2 of theexpansion tank 3 if it has not already been provided with the flow-throughmember 1 during assembly. - The flow-through
member 1 shown in Figure 3 corresponds to the flow-throughmember 1 shown in Figure 2, except that theflange edge 5 has been removed from the basic part 1a and the basic part 1a is provided with aflange 21 on the side of the second connection end of the flow-throughmember 1. When the basic part 1a is mounted in theconnection nipple 2, theflange 21 bears against the outer edge of theconnection nipple 2. If a suitable material is selected, theflange 21 can be used as a sealing ring between theconnection nipple 2 and theconnection socket 12. - In the flow-through
member 1 illustrated in Figure 4, the inner sleeve 7 has been eliminated andgrooves 16 are arranged in thespacers 6, in which grooves the rib 15 of the flow-guidance element 14 can be positioned. In this case, the flow-guidance element 14 extends at least as far as the first connection end of the flow-throughelement 1. If desired, openings may be formed in that end of the flow-guidance element 14 which is located in the vicinity of the first connection end, through which openings water can flow in the radial direction. - Figure 5 shows the flow-through
member 1 shown in Figure 1, with a V-shapeddirecting element 18 arranged on the flow-guidance element 14. Consequently, the flow-guidance element 14 will rotate into the correct position more quickly. Moreover, the V-shapeddirecting element 18 causes downstream turbulence in the water, resulting in a greater difference between the pressure in the first flow-through passage 30 and the pressure in themain flow passage 50 downstream of the flow-guidance element 14. This has a beneficial effect on the flow through theexpansion tank 3. - Preferably, the flow-through member according to the invention is made from a material which is simple to process, such as a plastics material. Obviously, the flow-through member may also be made from any other material which is suitable for use in a water supply system, such as stainless steel or brass.
- The embodiments described above are given as non-limiting examples. It will be clear to a person skilled in the art that numerous changes and modifications may be made to the exemplary embodiments without departing from the scope of the invention as defined in the appended claims.
- For example, it is possible to replace the basic part 1a by a sealing ring with spacers in which the flow-
guidance element 14 can be rotatably arranged. A flow-throughmember 1 of this nature can be arranged in an expansion tank which has already been assembled. - Furthermore, the first flow-through passage 30 and the second flow-through
passage 40 may be eccentric with respect to one another. - Also, the basic part 1a may comprise a solid part with a first hole in which the flow-
guidance part 14 can be arranged, and a plurality of drilled holes with a smaller diameter than the diameter of the first hole, in order to allow water flowing through the first hole to flow back. - In another embodiment, the inlet opening 8 and the directing
vane 18 are arranged in or on a separate element which is positioned rotatably over an axial opening at the free end of the flow-guidance element 14. - The flow-
guidance element 14 may be provided, on the side of the inlet opening 8, with a projecting edge which is perpendicular to the outer circumference and closes off part of the second flow-throughpassage 40.
Claims (8)
- Flow-through member (1) which is suitable for being positioned in a connecting passage of an expansion tank in order to define a first flow-through passage (30) and a second flow-through passage (40) in the connecting passage, the flow-through member (1) comprising a basic part (1a), by means of which the flow-through member (1) can be secured in the connecting passage, and a flow-guidance element (14), which is connected to the basic part (1a) and has an inlet opening (8) with an inlet direction which forms an angle with the centre axis of the flow-guidance element (14), characterized in that the flow-guidance element (14) is movably connected to the basic part (1a).
- Flow-through member according to claim 1, wherein the flow-guidance element (14) is rotatably connected to the basic part (1a).
- Flow-through member according to claim 2, wherein the flow-guidance element (14) is substantially cylindrical and is arranged in an axially displaceable manner in the basic part (1a), the basic part (1a) being provided with first coupling means which interact with associated second coupling means arranged on the flow-guidance element (14), so that the flow-guidance element (14) can be arranged in at least two positions, which are axially offset with respect to one another, in the basic part (1a), the coupling means being designed to lock the axial position of the flow-guidance element (14) in the basic part (1a) and to allow rotation of the flow-guidance element (14).
- Flow-through member according to one of claims 1-3, wherein the flow-guidance element (14) is provided with directing means in order to direct the inlet opening towards the upstream direction of a flow around the flow-guidance element (14) at least during operation.
- Flow-through member according to claim 4, wherein the directing means comprise a directing vane (18), the directing vane (18) being substantially planar and being arranged on the outer circumference and on the side which lies opposite to the inlet opening of the flow-guidance element (14), in a plane running through the centre axis of the flow-guidance element (14).
- Flow-through member according to claim 4, wherein the directing means comprise a directing element which is substantially V-shaped in cross section, the bisector plane of the V-shaped directing element being a plane which runs through the centre axis of the flow-guidance element (14).
- Flow-through member according to one of claims 1-6, wherein which the flow-guidance element (14) comprises a substantially tubular flow part and an inlet part, a first axial end of the tubular flow part being connected to the basic part (1a), and a rotatable inlet part being arranged at a second axial end, which lies at a distance from the basic part (1a), of the tubular flow part, the inlet part being provided with the inlet opening (8).
- Expansion tank provided with a flow-through member (14) according to one of claims 1 to 7.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL1010744A NL1010744C2 (en) | 1998-12-07 | 1998-12-07 | Expansion vessel provided with a flow-through member. |
NL1010744 | 1998-12-07 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1008812A1 EP1008812A1 (en) | 2000-06-14 |
EP1008812B1 true EP1008812B1 (en) | 2003-06-25 |
Family
ID=19768267
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19990204167 Expired - Lifetime EP1008812B1 (en) | 1998-12-07 | 1999-12-06 | Flow-through member for an expansion tank |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1008812B1 (en) |
DE (1) | DE69909043T2 (en) |
NL (1) | NL1010744C2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1010978C2 (en) * | 1999-01-07 | 2000-07-11 | Flamco Bv | Flow divider. |
EP3048374A1 (en) | 2015-01-22 | 2016-07-27 | Global Water Solutions Ltd. | Retrofitable flow-through connector assembly and expansion tank apparatus |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE8507703U1 (en) * | 1985-03-15 | 1985-08-01 | Flamco B.V., Gouda | Connection piece for an expansion tank |
DE19609375C1 (en) * | 1996-02-29 | 1997-06-12 | Otto Heat Heizungs | Connecting fitment for expansion vessel in water supplies |
-
1998
- 1998-12-07 NL NL1010744A patent/NL1010744C2/en not_active IP Right Cessation
-
1999
- 1999-12-06 DE DE69909043T patent/DE69909043T2/en not_active Expired - Lifetime
- 1999-12-06 EP EP19990204167 patent/EP1008812B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE69909043D1 (en) | 2003-07-31 |
EP1008812A1 (en) | 2000-06-14 |
DE69909043T2 (en) | 2004-05-19 |
NL1010744C2 (en) | 2000-06-08 |
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