GB1583088A - Lownoise valve - Google Patents

Description

(54) LOW-NOISE VALVE (71) -We, JOH. VAILLANT KG, A company of the Federal Republic of Germany, at 5630 Remscheid, Postfach 10 10 20, Berghauser Strasse 4O, Federal Republic of Germany, do hereby declare the invention, for which we pray that a patnt may be granted to us, and the method by which it is to be performed to be particularly described in and by the following statement: This invention relates to a low-noise valve.

According to the present invention we provide a valve comprising an annular valve seat, and a conical valve body having webs that each protrude beyond the generators of the cone, the thickness of each web being equal to or greater than l/lOth of the diameter of the cone at its base and each of the leading edge surfaces of said webs having substantially the same inclination to the axis of the cone.

The invention will be more fully understood from the following description given by way of example only in relation to the figures of the accompanying drawings, in which: Figures 1 and 2 are views on 1st angle orthographic projection of a side elevation and plan respectively of a valve of the invention.

In Figure 1, on the left the valve is shown in a closed state with the valve on its seating and on the right in an open state with the valve away from the seating.

Figure 2A is a scrap section on the section station II II of Figure 2.

Figures 3 and 4 are views similar to Figures 1 and 2 of another valve of the invention.

In each of the four figures the same reference numerals refer to the same details.

An annular valve seating 1 of a thermostat valve of a central heating system not shown in greater detail receives liquid in the direction of arrow 20 and co-operates with a valve body 2 in the area of a seating surface 3 (sealing plane 31 3it). The valve body 2 is comprised of a right cylindrical part 4 of circular section to which there is attached a connecting rod 5, and a frustoconical part 6 which is a frustum of the cone having generator G1G2 apex at G2 and mounted on the right cylindrical part 4 and covered by a rounded cap 7. On part 6 there are mounted webs 9 that have inclined leading edge surfaces 10 beginning adjacent the area of the cap 7 and connected with the frusto-conical part 6 at position 111 via outer surfaces 13 parallel to central axis 12 of the frusto-conical part 6 and at position 112 via inner surfaces 14.

For a specific diameter a (Figure 2) at position 111 a thickness b of the web is selected so that it is equal to or greater than l/lOth of the diameter a; The less webs that are distributed across the part 6 the greater is the thickness of each of the webs. In Figures 1 and 2, the webs 9 are each arranged tangentially to the cap 7 as shown by tangents t1t tg. All edges 10 of the webs 9 are inclined in one direction such that each of the inclined leading edge surfaces 10 has an inclination that is provided from the side surface 13 towards the longer inner surface 14 of the web 9.

The inclination of the inclined surface 10 is such (see arrow 15 Figures 2 and 4) that it is either tangential or radial and an extension shown by line El E2 passes beyond the surface 3 to meet it extended at P2 (Figure 1) in sealing plane 31311 which point P1 is radially outside the annular valve seat to cause water passing thereby not to impinge upon the seating surface 3.

The inclination circumferentially in the direction of arrow 16 Figure 2 is such that an extension of it contacts the seating surface 3 at a position behind the next following web. This is made clear in the scrap section at Figure 2A where the inclined line EE of web 10 contacts the sealing plane 31311 at P1 behind the next following web 109.

In Figures 3 and 4 the webs 10 are arranged radially with respect to the axis 12, the side surface 13 of the webs being parallel to the inner walls 17 opening into the valve seat 1. The individual webs may be separate bodies placed in a die and subsequently around which material of the frusto-conical part 6 is die-cast. The valve receives liquid in the direction of the arrow 20.

The modus operandi of the valves described above is as follows:- When the connecting rod 5 is forced upwardly by a thermostat attachment from the open state (Figures 1 and 3 on the right hand side) a through-pass gap 18 between surface 3 and valve seat 1 is narrowed, liquid is divided by the webs 9 in the area of walls 17 of inflow channel 19. A division takes place into a partial stream impinging on to the inclined leading edge surfaces 10 and a partial stream impinging onto the surface of the part 6 forming two streams superimposed so that the formation of eddy currents is avoided and this results in a silent operating valve.

WHAT WE CLAIM IS: 1. A valve comprising an annular valve seat, and a conical valve body having webs that each protrude beyond the generators of the cone, the thickness of each web being equal to or greater than l/lOth of the diameter of the cone at its base and each of the leading edge surfaces of said webs having substantially the same inclination to the axis of the cone.

2. The valve according to Claim 1, wherein the inclination is radial of the base of the cone.

3. The valve according to any preceding claim, wherein the inclination is such that when extended it intersects a sealing plane radially outside the said annular valve seat.

4. The valve according to Claim 3, wherein the inclination is so arranged that when extended circumferentially it contacts the sealing plane behind the next following web.

5. The valve according to any preceding claim, wherein the webs are placed tangentially to the cone.

6. The valve according to any preceding claim, wherein the valve body is a frustum of a cone.

7. A valve constructed and arranged substantially as herein described and shown in Figures 1 and 2 of the accompanying drawings.

8. A valve constructed and arranged substantially as herein described and shown in Figures 3 and 4 of the accompanying drawings.

**WARNING** end of DESC field may overlap start of CLMS **.

Claims (8)

**WARNING** start of CLMS field may overlap end of DESC **. part 6 is die-cast. The valve receives liquid in the direction of the arrow 20. The modus operandi of the valves described above is as follows:- When the connecting rod 5 is forced upwardly by a thermostat attachment from the open state (Figures 1 and 3 on the right hand side) a through-pass gap 18 between surface 3 and valve seat 1 is narrowed, liquid is divided by the webs 9 in the area of walls 17 of inflow channel 19. A division takes place into a partial stream impinging on to the inclined leading edge surfaces 10 and a partial stream impinging onto the surface of the part 6 forming two streams superimposed so that the formation of eddy currents is avoided and this results in a silent operating valve. WHAT WE CLAIM IS:

1. A valve comprising an annular valve seat, and a conical valve body having webs that each protrude beyond the generators of the cone, the thickness of each web being equal to or greater than l/lOth of the diameter of the cone at its base and each of the leading edge surfaces of said webs having substantially the same inclination to the axis of the cone.

2. The valve according to Claim 1, wherein the inclination is radial of the base of the cone.

3. The valve according to any preceding claim, wherein the inclination is such that when extended it intersects a sealing plane radially outside the said annular valve seat.

4. The valve according to Claim 3, wherein the inclination is so arranged that when extended circumferentially it contacts the sealing plane behind the next following web.

5. The valve according to any preceding claim, wherein the webs are placed tangentially to the cone.

6. The valve according to any preceding claim, wherein the valve body is a frustum of a cone.

7. A valve constructed and arranged substantially as herein described and shown in Figures 1 and 2 of the accompanying drawings.

8. A valve constructed and arranged substantially as herein described and shown in Figures 3 and 4 of the accompanying drawings.