WO1995012776A1

WO1995012776A1 - Device, especially a valve, for the passage of a fluid

Info

Publication number: WO1995012776A1
Application number: PCT/DK1994/000410
Authority: WO
Inventors: Hans Kurt Petersen
Original assignee: Danfoss A/S
Priority date: 1993-11-04
Filing date: 1994-11-01
Publication date: 1995-05-11
Also published as: DE4337525A1; DE4337525C2

Abstract

A device, especially a valve, for the passage of a fluid has a housing (2) which is arranged to be connected to a pipe (1) so that the fluid is conveyed through a first duct (5) out of the pipe (1) into the housing (2) and through a second duct (6) out of the housing (2) back into the pipe (1). In the known case, the housing is built into the pipe. The housing is a valve housing in which the valve seat and the valve closure member are arranged in the housing and the actuating element for the valve closure member is lead through the wall of the housing and the pipe to the outside. So that the device can be more generously dimensioned, simpler to mount and manufacture, according to the invention the housing (2) is arranged to be mounted on the outside of the pipe (1) and a stopper (7) of the device defining the first and the second duct (5, 6) is arranged to be inserted in the pipe (1).

Description

Device, especially a valve, for the passage of a fluid.

The invention relates to a device, especially a valve, for the passage of a fluid, having a housing which is arranged to be connected to a pipe so that the fluid is conveyed through a first duct out of the pipe into the housing and through a second duct out of the housing back into the pipe.

In a known device of that kind (DE 26 50 071 Al) , the housing of a valve is inserted in the pipe and the actuating rod of a valve closure member is lead, sealed, through the housing and the pipe wall to the outside. In this case, the construction of the housing is limited by the given internal diameter of the pipe. The flow through the pipe is restricted by the housing of the valve to the cross-section of the duct leading through the valve housing, and the installation of the actuating rod for the valve closure member is difficult.

The invention is based on the problem of providing a device of the kind mentioned in the introduction which can be more generously dimensioned and is simpler to mount and manufacture.

According to the invention, this problem is solved in that the housing is arranged to be mounted on the outside of the pipe and a stopper of the device defining the first and the second duct is arranged to be inserted in the pipe.

In this construction, the housing and the parts arranged therein can be substantially of any desired construction; in particular, the dimensions of the housing can be very much larger than the diameter of the pipe. Only the stopper has to be matched to the internal diameter of the pipe, so that it blocks the flow through the pipe at the point at which it is installed. Depending on the application, the pipe can be a pipe that is already in situ, or a length of pipe subsequently inserted in the run of a pipeline.

Advantageous constructions of the solution according to the invention are characterized in the subsidiary claims.

The invention and its constructions are described in greater detail hereinafter with reference to drawings of preferred embodiments. In the drawings,

Fig. la is a longitudinal section through a straight pipe and a part of a first embodiment of a device according to the invention joined to the pipe,

Fig. lb is a cross-section through the pipe according to Fig. la and the device connected thereto, looking to the right in Fig. la,

Figs 2a and 2b show the same sectional views as in Figs la and lb of an angled pipe and a second embodiment of a device according to the invention that has been modified somewhat in respect of the housing,

Figs 3a and 3b show the same sectional views as those according to Figs la and lb of a third embodiment having a slightly modified straight pipe,

Figs 4a and 4b show the same embodiment as that according to Figs 3a and 3b, but with an angled pipe,

Figs 5a and 5b show a similar embodiment to that according to Figs 3a and 3b, but with an additional joining member between the housing and the pipe,

Figs 6a and 6b show the same embodiment as that according to Figs 5a and 5b, but with an angled pipe instead of a straight pipe, Fig. 7a and 7b show the same sectional views as those according to Figs la and lb of a seventh embodiment, Figs 8a and 8b show sectional views of an eighth embodiment of the device according to the invention, Figs. 9a and 9b show sectional views of a ninth embodiment of a device according to the invention, Figs. 10a and 10b show sectional views of a tenth embodiment of a device according to the invention, Figs lla and lib show sectional views of an eleventh embodiment of a device according to the invention, Fig. lie is a plan view of a stopper of the embodiment according to Figs lla and lib, Figs. 12a and 12b show sectional views of a twelfth embodiment of a device according to the invention, Fig. 12c is a plan view of a stopper of the embodiment according to Figs 12a and 12b, Figs. 13a and 13b show sectional views of a thirteenth embodiment of a device according to the invention, and Figs. 14a and 14b show a sectional view and a side view of a fourteenth embodiment of a device according to the invention.

The device according to Figs la and lb is a valve having a housing 2, a valve seat 3 and a valve closure member 4, joined to a straight pipe 1. The remaining parts of the valve have been omitted to simplify the illustration.

The fluid passed through the pipe 1 flows through a first duct 5 out of the pipe 1 into the housing 2 and through a second duct 6 out of the housing 2 back into the pipe 1 for as long as the valve is open. The housing 2 is secured to the outside of the pipe 1. A stopper 7 defining the first duct 5 and the second duct 6 is inserted non-movably, sealed, in the pipe 1, for example, by frictional engagement, or by material engagement (adhesion, welding or soldering) . The pipe wall has a first hole 8, the edge of which surrounds the first duct 5, and a second hole 9, the edge of which surrounds the second duct 6. The stopper 7 is inserted between the holes 8 and 9.

The housing 2 has in a base two openings 10 and 11 which, when the pipe 1 and housing 2 are joined, are coaxial with or align with a respective one of the holes 8, 9 of the pipe 1. On its outside, the base of the housing 2 has a groove 12 matched to the cylindrical shape of the pipe 1 and which receives the pipe 1. The opening 11 in the base of the housing 2 is defined by an inwardly projecting pipe stub 13, the edge of which opening positioned inside the housing forms the valve seat 3.

The pipe 1 can be an existing pipe of a piping system, in the pipe wall of which only the holes 8 and 9 require to be made; the stopper 7 is then introduced either through one of the holes 8 and 9, if these are made sufficiently large, or is introduced from a connecting end of the pipe 1 into the pipe between the holes 8 and 9. Apart from the groove 12, the housing 2 may largely be of any construction desired, and internally may have a wide variety of components, in this particular case the valve seat 3 and the closure member 4 with associated actuating elements, which are not illustrated. The construction illustrated is therefore largely independent of the shape and size of the pipe 1 and can also be connected subsequently to an existing installed pipe 1. The connection between the pipe 1 and the housing 2 can be a simple material connection, effected, for example, by adhesion, welding or soldering.

The embodiment according to Figs 2a and 2b differs from that according to Figs la and lb merely in that the pipe la is angled.

The embodiment according to Figs 3a and 3b differs from that according to Figs la and lb merely in that the base of the housing 2a has no groove on its outside and instead the edges of the holes 8 and 9 are extended outwards from the pipe lb and are inserted in a respect; e one of the openings 10 and 11 of the housing 2a.

The embodiment according to Figs 4a and 4b differs from that according to Figs 3a and 3b merely in that the pipe lc is angled.

The embodiment according to Figs 5a and 5b differs from that according to Figs 3a and 3b in that the pipe 1 is of the same construction as the embodiment according to Figs la and lb, and the housing 2a is connected to a connecting piece 14 which has holes 15 and 16, the edges of which, on one side, are drawn into the openings 10 and 11 of the housing 2a and, on the other side, are joined to edges of the holes 8 and 9 of the pipe 1. For receiving the pipe 1, the connecting piece 14 has on its underside a groove 17 matched to the cylindrical contour of the pipe 1. In this construction, the base of the housing 2a can again be flat on its underside and a pipe 1 that has already been installed can bs used.

The embodiment according to Figs 6a and 6b differs fr that according to Figs la and lb merely in that tb-***.* pipe la is angled.

In the embodiment according to Figs 7a and 7b, the pipe Id is T-shaped and its one end portion 18 is inserted with a matching fit into the pipe stub 13. The hole 8 that aligns with the opening 10 in the base of the housing 2a is made in the other end portion 19 of the T-pipe Id. The base of the housing 2a is here likewise provided with a groove 12 as in the embodiment according to Figs la and lb. The end portions 19 and 20 of the pipe Id received by the groove 12 extend in the normal flow direction of the fluid.

The embodiment according to Figs 8a and 8b differs from that according to Figs 7a and 7b merely in that the end portions 19 and 20 of the pipe le are at right angles to one another and the end portions 18 and 20 are coaxial with one another.

In the embodiment according to Figs 9a and 9b, the stopper 7a is in the form of a tubular member which defines the second duct 6. The stopper 7a in the form of a tubular member projects through the second hole 9 of the pipe 1 into the housing 2 and its opening edge positioned in the housing 2' forms the valve seat 3. The end of the stopper 7a projecting into the pipe 1 is held between two inwardly pressed beads 21 formed in the pipe wall. Because the stopper 7a is constructed as a tubular member, the pipe stub 13 necessary in the preceding embodiments can be omitted. For the rest, this embodiment can be of the same construction as that according to Figs la and lb.

In the embodiment according to Figs 10a and 10b, the stopper 7b is likewise constructed as a tubular member, which defines the second duct 6. The stopper 7b is likewise introduced through the second hole 9 of the pipe 1 into the housing 2b, and its opening edge lying in the housing 2b is constructed as a valve seat 3. The pipe 1 is passed through openings 22 and 23 in the lateral walls of the housing 2b and is sealed therein, for example, by adhesion, welding or soldering. In this construction, the base of the housing 2b can be completely flat and the pipe stub 13 can also be omitted. When assembling the pipe 1 and housing 2b, no attention need then be paid to aligning the holes 8 and 9 of the pipe 1 with corresponding openings in the housing. This simplifies mounting. Unlike the length of pipe 7a, the end of which projecting into the pipe 1 is closed at the bottom and is open laterally, the length of pipe 7b can be of straight construction since at its end projecting into the pipe 1 it is bevelled, as illustrated in Fig. 10a.

In the embodiment according to Figs lla to lie, the stopper 7c is also in the form of a tubular member and is passed through a single hole 8 in the pipe wall and an opening 10 of the housing 2c aligned with this hole 8. At its side lying above the fluid flow 24 in the pipe If, the stopper 7c is spaced from the edges of the holes 8 and the opening 10 so that together with the hole 8 and the opening 10 it defines the first duct 5. As shown in Fig. lib, the housing 2c in its turn has a continuous groove 12 in its base, in which the pipe If is fixed. The valve seat 3 is again constructed at the opening edge of the stopper 7c lying inside the housing. The stopper 7c has an angled bore and is furthermore secured in a groove 25 in the pipe wall which is pressed radially outwards and is of rectangular cross-section in Fig. lib.

The embodiment according to Figs 12a to 12c differs from that according to Figs lla to lie substantially only in that the pipe lg is again of continuous cylindrical construction and the portion of the -topper 7d in the form of a tubular member passing thr _*gh the opening 8 into the pipe lg is not rectangular in cross-section but is rounded, to correspond to the cylindrical shape of the pipe lg. The pipe lg is then passed through openings 22 and 23 in the lateral walls of the housing 2b.

The embodiment according to Figs 13a and 13b differs from that according to Figs 12a to 12c in that the stopper 7e in the form of an angled tubular member projects coaxially with its inner end portion into the pipe lh and is secured, sealed, therein. The embodiment according to Figs 14a and 14b corresponds substantially to the embodiment according to Figs 9a to 13b. An electromagnetic valve is illustrated as an example, to the magnet armature 26 of which the valve closure member 4 is secured. The electromagnetic valve has a magnetic core 27 which is surrounded by a magnetic winding, not illustrated. When the magnet is energized, the magnetic armature 26 is drawn against the force of a spring 28 towards the magnetic core 27 so that it lifts the valve closure member 4 away from the valve seat 3 and opens the valve.

The range of application is not restricted to valves. Instead, the device can be used in filters, flow meters, calorimeters, thermometers, other measuring appliances, inspection windows, and so on.

Claims

Patent Claims

1. A device, especially a valve, for the passage of a fluid, having a housing (2; 2'; 2a-2d) which is arranged to be connected to a pipe (1; la-lh) so that the fluid is conveyed through a first duct (5) out of the pipe (1; la-lh) into the housing (2; 2 ; 2a-2d) and through a second duct (6) out of the housing (2; 2 ' ; 2a-2d) back into - iβ pipe (1; la-lh), characterized in that the housing (2; 2 ; 2a-2d) is arranged to be mounted on the outside of the pipe (1; la-lh) and a stopper (7; 7a-7e) of the device defining the first and the second duct (5, 6) is arranged to be inserted in the pipe (1; la-lh) .

2. A device according to claim 1, characterized in that the pipe wall has a first hole (8) , the edge of which surrounds the first duct (5) , and a second hole

(9) , the edge of which surrounds the second duct (6) .

3. A device according to claim 2, characterized in that the housing (2; 2 ' ; 2a) has in a base two openings (10, 11) which, when the housing (2; 2 ' ; 2a) and the pipe (1; la-le) are joined, are coaxial with a respective one of the holes (8, 9) of the pipe (1; la- le) .

4. A device according to claim 2 or 3, characterized in that the stopper (7) is arranged to be inserted between the holes (8, 9).

5. A device according to claim 3 or 4, characterized in that the base of the housing (2a) is substantially flat on its outside.

6. A device according to one of claims 3 to 5, characterized in that the edges of the holes (8, 9) are drawn out of the pipe (lb; lc) and are arranged to be introduced into a respective one of the openings (10, 11) of the housing (2a) .

7. A device according to one of claims 3 to 5, characterized in that the base of the housing (2; 2 ; 2a) has on its outside a groove (12) matched to the cylindrical shape of the pipe (1; la; Id; le) .

8. A device according to one of claims 3 to 5, characterized in that the housing (2a) is connected to a connecting piece (14) which has holes (15, 16) , the edges of which are drawn on one side into the openings (10, 11) of the housing (2a) and on the other side are arranged to be joined to edges of the holes (8, 9) of the pipe (1; la) .

9. A device according to claim 8, characterized in that the side of the connecting piece (14) remote from the housing (2a) is matched to the cylindrical shape of the pipe (1; la) .

10. A device according to one of claims 3 to 9, characterized in that one opening (11) in the base of the housing (2; 2a) is defined by an inwardly projecting pipe stub (13) , the opening edge of which lying inside the housing (2; 2a) is in the form of a valve seat (3) .

11. A device according to claim 10, characterized in that the pipe (Id; le) is in the form of a T-shaped pipe, the one end portion (18) of which is inserted with a matching fit in the pipe stub (13) .

12. A device according to claim 1, characterized in that the stopper (7a-7e) is in the form of a length of pipe which defines the second duct (6) .

13. A device according to claim 3 and 12, characterized in that the length of pipe (7a-7e) projects right through a hole (8; 9) in the pipe (1; lf-lh) into the housing (2; 2'; 2b-2d) and its opening edge lying in the housing is in the form of a valve seat (3) .

14. A device according to claim 12, characterized in that the stopper (7c-7e) in the form of a length of pipe is guided through a hole (8) in the pipe wall and optionally an opening (10) of the housing (2d-2d) aligned with this hole (8) , and on its side lying above the fluid flow (24) in the pipe (lf-lh) is spaced from the edge of the hole (8) and optionally the opening (10) so that together with the hole (8) and optionally the opening (10) it defines the first duct (5) .

15. A device according to one of claims 12 to 14, characterized in that the pipe (1; lg; lh) is passed right through the housing (2b) .