CH619306A5 - Flow limiter for media flowing in conduits - Google Patents

Description

619306 2

PATENT CLAIMS 10. Flow limiter according to claims 1 and 9,

1. Flow limiter for media flowing in lines, characterized in that the slope of the cone (38) of the pressure difference, which is accommodated in a housing and is steeper under the conical insert (3 ') than that of the wall which forms the wall when flowing through, ( 40) of the housing cavity receiving it.

change the flow cross-section depending on its deformation - 5 11. flow limiter according to claims 1, 9 and 10,

the elastic body and with from the inlet side to the characterized in that the outlet holes (37) after the

Outflow side of the limiter extending, are flared conically between the outlet side.

12. Flow limiter formed according to claim 1, characterized in that the housing (1) acts as a line, in particular running spaces (4,21,22; 36,49 ) arranged symmetrically to the flow axis io in the outlet of a line or a fitting part and at least for the most part formed by a circular cylindrical sleeve that can be tapered, and that at Chen (5,18,27; 32,38,40) limits its circumference as flow guiding surfaces are an O-ring (25) in an outer annular groove (26). is used as a seal.

2. Flow limiter according to claim 1, characterized in 13. Flow limiter according to claim 1, characterized in that the elastic body as a throttle element (2) in 15 shows that the housing (1) is formed on the inflow side with an essentially conical shape that in the winch (23) and on the outlet side with an external thread (24) housing (1) that narrows towards the outlet side can be seen (Fig. 6).

conical seat (18) is arranged, and that the 14th flow restrictor according to claim 1, characterized in

Flow spaces (21, 4, 22) between the conical seat shows that the housing (1) is inserted into a connecting piece (44).

Surface (18) and the elastically supporting throttle 20 is set on it, which are formed on the inflow side internal thread (45) and on the organ (2). Outflow side has external thread (46) (Fig. 11).

3. flow limiter according to claims 1 and 2,

characterized in that the throttle member (2) on its

Base has a collar (16) of through holes

(10) is penetrated, and that the throttle member (2) is clamped by means of this zs collar (16) in the housing (1).

4. Flow limiter according to claims 1 and 3, the invention relates to a flow limiter for in Lei-characterized in that the cone-shaped seat surface (18) lines flowing media, with a in a housing underneath in an outside essentially circular cylindrical, brought into itself deforming under the housing (1) forming and flowing through the insert (3) forming pressure difference, depending on its deformation the flow cross-section changing elastic body and with

5. Flow limiter according to claims 1 to 4, characterized from the inlet side to the outlet side of the limiter, characterized in that the insert (3) with thread (13) extending between the elastic body and housing-fine screwed the housing (1) and the collar (16) of the throttling parts formed through-flow spaces.

selorgans (2) between the inner end of the insert (3) and 35 flow restrictors of this type are known.

a counter surface of the housing (1) is clamped. In a known type, the elastic body was on

6. Flow limiter according to claims 1 to 5, O-ring or a hose-like ring, which is characterized in that on the circumference of the collar (16) when flowing through a medium under which ring webs (8,9) are formed , one of which (8) placed in a ring-shaped recess provided for this purpose, undulating the pressure difference against the support cams, in the interior of the 40 perimeter of a core body fixed to the housing, housing (1) and the other (9) on an outer annular shoulder which between the ring and the circumferential cam remaining (12) of the insert (3) fits. Passages depending on the degree of elastic deformation of the

7. Flow limiter according to claim 1, characterized in that the ring forms free passage cross sections of different sizes in that the housing (1) has a bottom on the inlet side. It was already considered here that the flow passage, in the middle of which an inflow opening (7) is arranged to reduce 45 noise; This aim should be based on the arrangement of the cones which are expediently conical in the flow direction or by the largest possible number of rounded main cams

Rounding its leading edge is narrowed. serve the scope of the core body fixed to the housing. In spite of

8. flow limiter according to claims 1 to 3 and 7, relatively complicated design of the use here-characterized in that the collar (16) of the throttle organ satisfies the parts achievable noise reduction

(2) on its surface facing the inflow opening (7) does not have a 50, but because the counter cone (27) protruding into the inflow opening (7), viewed in the direction of the passage, the cross-sectional change towards the outlet side is not sufficient.

9. Flow limiter according to claim 1, characterized in that it progressed gradually; in addition, the well-known design tends to show that the elastic body still has limescale deposits on the inflow side.

conically expanded throttle ring (2 '), which is based on the object of the invention,

To create the inflow side of the housing (1) into a flow limiter of the type mentioned in the introduction,

ter (31) forming cylindrical recess (30) is used, which is as quiet as possible and the required flow

that an essentially conical quantity is reached in the housing (1) at the lowest possible pressure, but is inserted via a shaped insert (3 ') with a flange (33) which is as large as possible, at least the whole in public water

has a preferably cylindrical spigot (35), which keeps the pressure range to be found in the supply networks almost constant in the throttle ring (2 ') while maintaining a distance 60, so that the longest possible trouble-free protrudes from its inner wall and that one reaches the operating life is exposed to the current

(3 ') receiving, towards the drainage side conical parts should be as insensitive to calcification, expanding cavity is provided in the housing (1), which is simple in construction, inexpensive to manufacture and

Wall (40) together with the conical surface (38) of the use of media flowing easily in lines, in particular water,

(3 ') delimits a conical annular gap (49), in which the 65 z. B. to be installed in sanitary fittings.

Flange (33) of the insert which closes the housing cavity. According to the invention, this object is achieved by

(3 ') to the annular gap (49) adjoining outlet holes (37) that the flow spaces are arranged in a ring shape symmetrically to the flow axis. arranged and at least for the most part by conical surfaces

619306

Chen are limited as flow control surfaces.

Details result from the following description of several exemplary embodiments with reference to the drawing.

1 shows a first embodiment of a flow limiter designed according to the invention in section with the parts at rest,

2 shows a section along line II-II in FIG. 1,

3 shows a section along line III-III in FIG. 1,

1 corresponding section in the working position of the parts,

5 shows a throttle cone half in view, half in section, FIG. 6 shows an illustration of a second exemplary embodiment, half in view, half in section,

7 shows a section through a third embodiment in the rest position of the parts,

8 shows a section corresponding to FIG. 7 when the parts are in the working position,

9 shows an insert of the embodiment according to FIGS. 7 and 8 in view, partly in section,

Fig. 10 is a plan view of the insert of Fig. 9 and Fig. 11 is an illustration of a fourth embodiment half in view, half in section.

In the examples according to FIGS. 1 to 6, the limiter, in contrast to the examples according to FIGS. 7 to 11, is also designed as a check valve.

The flow restrictors designed according to the invention are composed of three main parts, namely a housing 1, an insert 3 or 3 'fixed to the housing and an elastic body 2 or 2', which leaves flow spaces between them and the insert. In the example of FIGS. 1 to 5, the housing 1 is in a liquid, for. B. water pipe to be inserted, therein to be held against axial movement in the direction of the liquid pressure in any suitable manner sleeve (cartridge); In an annular groove 26 of the circular cylindrical shell of this sleeve, an O-ring 25 made of easily deformable elastic material is used as a seal. The bottom of the housing 1 facing the inflow direction and level on its rear side has an inflow bore 7 with a rounded inlet edge; its flat inner surface is surrounded by a recess 11 forming an annular groove. At its lower outlet end in FIGS. 1 and 4, the housing 1 has an internal thread. For this purpose, the insert 3 has a suitable external thread 13 with which it can be screwed into the housing 1. The housing 1 is rigid and consists of a material that is dimensionally stable with respect to all stresses, preferably of corrosion-resistant metal.

The insert 3 is an essentially circular cylindrical outside, fitting into the housing 1, inside towards the outlet side up to an outlet opening 6 forming a conical seat surface 18, that is to say a cone-shaped constricted sleeve-like body made of dimensionally stable, corrosion-resistant material, preferably hard plastic. At its end facing the inlet side it forms an outer annular shoulder 12. In its area facing the outlet end, which has the greatest wall thickness due to the conical shape of its passage space, blind hole bores 14 are provided, into which pins of a key can be inserted if the insert 3 is used its thread 13 is screwed into the housing.

The throttle body is designed here as a whole as a cone 2 with the tip 5 pointing in the discharge direction and clamped between the bottom of the housing 1 and the insert 3. It has at its base a collar 16 which is penetrated by through holes 10 arranged on a circle described about the point of intersection of the cone axis. On the circumference of the federal government 16, an annular web 8 is formed on the inlet side and an annular web 9 is formed on the outlet side.

The ring web 8 fits into the housing recess 11 and the outer ring shoulder 12 of the insert 3 fits onto the ring web 9. The tip 5 of the throttle cone 2 projects into the outlet opening 6 of the insert 3. Towards the outlet side, the collar 16 forms a cylindrical skirt 15 of the diameter of the cone base. In this apron notches 4 are provided, which extend to the cone shell, the base areas of which lie on the cone shell. There are as many notches 4 as there are holes 10 in the collar 16. On the side facing the outlet opening, the apron 15 forms a circular edge 20 which has the shape of a circle broken through by the notches 4. A counter cone 27 is formed on the area 19 of the collar 16 of the throttle cone 2 facing the inflow bore 7 in the region of this inflow bore 7. 15 The throttle cone 2 consists of resiliently flexible material, such as the restoring forces necessary to restore the initial shape, such as rubber, synthetic rubber or soft plastic.

In the exemplary embodiment according to FIG. 6, the housing 20 is extended towards the inlet side via an intermediate floor 28 containing the inflow bore 7. A sealing ring 29 is placed on the intermediate floor 28. The housing extension contains internal thread 23, with which the housing can be screwed onto a corresponding external thread-carrying line 25 or fitting part. At the outlet end, the housing in the example according to FIG. 6 carries an external thread 24 on which further fitting parts, e.g. B. screw an aerator or aerator of a known type.

In the rest position, as long as the inflow of a medium to be supplied under pressure to the flow limiter is blocked, as shown in FIGS. 1 and 6, the surface 19 of the throttle cone 2 facing the inflow bore 7 lies on the bottom or intermediate floor of the housing which delimits the inflow bore at; in the described examples, the counter cone 27 projects into the inflow bore 7. The inflow bore 7 is closed in this way against flow in the opposite direction, so that the flow limiter additionally acts as a backflow preventer in the exemplary embodiments described.

40 If the inflow of a medium under pressure, in particular water, is released while there is no or a lower overpressure on the outlet side of the flow limiter, the surface 19 of the collar 16 of the throttle cone 2 with the counter cone 27 is pressed away from the inflow bore 7 45, so that an opening gap 17 is formed. From the inflow bore 7, the flowing medium supplied under excess pressure passes through this gap 17 into the passage extinguisher 10 passing through the collar 16, from which it exits into a free space 21 in front of the seat cone 5o provided on the insert 3, surface 18. From this it gets into the through-channels formed by the notches 4 in the apron 15 of the throttle cone 2, which are delimited by the seat cone surface where the edge of the apron is supported on the seat cone surface 18 with elastic deformation. The largest part of the boundary surface of the flow channels is, however, formed by the material of the throttle cone, which deforms elastically and therefore does not tend to limescale deposits or begins to repel limescale deposits. Subsequently, between the tip 5 of the throttle cone 2 6o and the seat cone surface 18 of the insert 3, an annular gap 22 narrowing conically after the outlet opening 16 is formed, which the flowing medium emerging from the notch 4 in the apron 15 of the cone 2 without a sudden change in cross section of the outlet cross section feeds the opening 6. Since there are 65 as many notches 4 as through holes 10, the free space 21 behaves as if there were continuous transitions between the through holes 10 and the notches 4 without giving rise to noise.

619306

In the examples described, the bottom or intermediate bottom of the housing 1 containing the inflow bore 7 is made in one piece with it, while the seat cone surface 18 is formed on the special insert 3 of the housing 1. Modifications arise if, conversely, the housing bottom or intermediate floor containing the inlet bore 7 is a special part connected to the housing, while the part forming the conical seat surface 18 consists of one piece with the housing, i.e. the housing itself forms the conical seat surface 18 . Another group of modified embodiments results when the throttle cone 2 is not clamped into the housing 1 with a collar 16, as in the examples described, but instead is simply placed on the conical seat surface 18 without being clamped with a special collar . If the flow restrictor is also intended to be a backflow preventer, it can also be clamped between the conical seat surface 18 and the surface of the bottom or intermediate bottom of the housing 1 containing the inlet bore 7 and the outlet opening 6 under elastic prestress. As with the clamped collar 16, the flow gap 17 is then formed by elastic deformation of the throttle cone 2 and the flow is opened when the inflow of medium under pressure is released.

If the clamping collar 16 is omitted, special through holes 10 are also eliminated; the throttle cone is then freely flowed around from the inlet side.

In the example of FIGS. 7 and 8, the housing 1 is as in the example of FIGS. 1 to 5 as in a liquid, for. B. water pipe to be inserted, therein to be held against axial movement in the direction of the liquid pressure in any suitable manner sleeve (cartridge); In an annular groove 26 of the circular cylindrical jacket of this sleeve, an O-ring 25 made of easily deformable, elastic material is used as a seal. On the side facing the inflow direction, the housing 1 has a cylindrical recess 30 which forms a planar shoulder 31 in the housing 1. A throttle ring 2 ′, which surrounds the inflow opening and rests on the planar shoulder 31, is inserted into the recess 30 as an elastic body and has a conical widening 32 toward the inflow side.

On the outflow side, an insert 3 'with a flange 33 through which outlet holes 37 pass is inserted centrally and firmly into a recess 34 in the housing 1. It projects with a central, preferably cylindrical pin 35 into the space 36 enclosed by the throttle ring 2 'with the widening 32 adjoining on the inflow side.

Where the pin 35 attaches, the insert 3 'forms a shoulder 39. The central part 38 of the insert 3' extends conically from this shoulder 39 to the flange 33. Its conical surface is preferably somewhat steeper than the surrounding conical surface of the central housing cavity 40, in which the insert 3 'is inserted. In this way, a conical annular gap 49 which widens towards the outlet side is formed as a continuous space between the insert 3 'and the housing cavity 40. The exit holes 37 are ring-shaped in the flange 33 so that they lie in front of the mouth of the conical annular gap 49. The holes 37 themselves are flared towards the outlet side

In the example shown, the shoulder 39 (FIG. 9) of the insert 3 ′, when installed (FIGS. 7, 8 and 11), lies in the same plane as the flat shoulder 31 in the housing 1.

The housing 1 and the insert 3 'are rigid and consist of a dimensionally stable material, preferably corrosion-resistant metal, with respect to all occurring stresses.

Like the throttle cone 2 of the previously described exemplary embodiments, the throttle ring 2 'consists of elastic, resilient material, such as rubber, synthetic rubber or soft plastic, which provides the restoring forces necessary to restore the initial shape, in the event of elastic deformation.

If the flow limiter and thus the throttle ring 2 'is under pressure, the throttle ring 2' deforms such that it forms a bulge 41 (FIG. 8). This bulge narrows the cross section of the space 36 formed between the inner jacket of the throttle ring 2 'and the pin 35 and accordingly the flow rate; through the bulge 41, the wall in the area of the originally cylindrical space 36 forms a conical surface which widens towards the outlet side. All conical surfaces contribute to the reduction of noise generation and noise radiation.

In the exemplary embodiment according to FIG. 11, the outer shape of the housing is modified in such a way that it fits into the cylindrical cavities 42 and 43 of a connecting piece 44 that are intended to receive it. The inflow-side half of the connecting piece 44 has an internal thread 45 with which the flow limiter can be screwed onto a corresponding line or fitting part carrying an external thread. The drain-side half has an external thread 46 on which other fitting parts, e.g. B. screw an aerator or aerator of a known type. In the connector 44, a plan shoulder 47 is formed, on which a sealing ring 48 is placed

4th

5

10th

15

20th

25th

30th

35

40

45

G

2 sheets of drawings