Throttle valve

• US 4,109,683 A
• Filed: 11/24/1976
• Issued: 08/29/1978
• Est. Priority Date: 12/11/1975
• Status: Expired due to Term

• Current Assignee: Gestra AG (Spirax-Sarco Engineering PLC)
• Original Assignee: Gestra-Ksb Vertriebsgesellschaft
• Inventors: Strache, Wilhelm
• Primary Examiner(s): Rosenthal, Arnold
• Application Number:
  US05/744,550
• Time in Patent Office: 643 Days
• Field of Search: 137/625.37, 137/625.3, 251/205, 251/208, 138/45 A, 138/43
• US Class Current: 137/625.3
• CPC Class Codes: F16K 3/34 Arrangements for modifying the way in which the rate of flow varies during the actuation of the valve
• CPC Class Codes: F16K 47/08 for decreasing pressure or noise level and having a throttling member separate from the closure member , e.g. screens, slots, labyrinths
• CPC Class Codes: Y10T 137/86734 With metering feature
• CPC Class Codes: Y10T 137/86791 Piston

Abstract

A throttle valve formed from two jackets each having through bores. Each jacket includes two groups of bores, one group of bores being equally spaced from each other and the other group of bores having an intermediate bore unequally spaced from the outer end bores. The jackets are rotatable relatively to each other so as to align the bores for maximum and minimum flow.

Claims

1. A throttle valve, comprising:

a throttle member including at least two telescopically and coaxially disposed, substantially cylindrical jackets, each of said jackets having an equivalent number of groups of radially-extending throughflow bores distributed over at least a portion of the circumference thereof, the bores in each group being spaced apart from one another such that their axes lie in spaced apart planes normal to the longitudinal axes of said jackets, at least the axes of some of the bores of one group being offset relative to the axes of corresponding bores of an other group in a longitudinal axial direction of said jackets up to a maximum distance equivalent to the cross-section dimensions of said bores, the degree of said offset of corresponding bores of different groups differs from corresponding planes of axes to corresponding planes of axes, said jackets being rotatable relative to another so that, in a first position, the throughflow bores of said one group and said other group of one of said jackets are, respectively, at least partially alignable with the throughflow bores of said one group and said other group of the other of said jackets and, in a second position, the throughflow bores of said one group and said other group of one of said jackets are, respectively, at least partially alignable with the throughflow bores of said other group and said one group of the other of said jackets; and

a slide-locking portion coaxially disposed relative to said jackets, at least one of said locking portion and said throttle member being longitudinally axially displaceable to permit relative movement therebetween so as to permit opening and closing of said bores.

2. The valve according to claim 1 wherein said groups of bores each comprise a multiplicity of bores including two end bores, one of which is first opened by means of relative displacement between said throttle member and said locking portion and at least one intermediate bore, wherein at least some of said bores offset relative to said corresponding bores of said other group comprise said at least one intermediate bore and said first-opened end bore which are offset relative to the corresponding at least one intermediate bore and said first-opened end bore of said other group, respectively, the degree of offset between said corresponding bores progressively decreasing from the corresponding first-opened bore to at least the corresponding intermediate bores adjacent to the other end bore.

3. The valve according to claim 2 wherein the distance between adjacent planes in which the axes of the said bores of each of said groups lie, progressively decreases from the plane of said first-opened end bore to the plane of the other end bore in each group.

4. The valve according to claim 1 wherein the bores of all groups have the same diameter.

5. The valve according to claim 1 wherein said other end bores of each of said groups, each has an axis which lies in the same plane normal to the axes of said jackets.

6. The valve according to claim 1 wherein said bores on each of said jackets are identically arranged and in one position of said jackets relative to each other, said bores coincide with one another.

7. The valve according to claim 6 additionally including a wall having a connection opening formed therethrough, one end of said jackets being received on said wall concentrically-disposed relative to said opening thereof, and a hold down member engaged with the other end of said jackets for holding said jackets against said wall and wherein said locking member is longitudinally axially displaceable.

8. The valve according to claim 6 wherein said groups of bores each include at least three bores of equal diameter, two ends bores and an intermediate bore aligned in a row parallel to the axes of said jackets, said groups of bores on each of said jackets are arranged in two sets, including a first set of groups of bores in which the end bores of each group are equally spaced from the intermediate bore and a second set of groups of bores in which the end bores of each group are unequally spaced from the intermediate bore, said first set of groups of bores being radially positioned over approximately one-half the circumferential extent of each of said jackets and said other set of said groups being radially positioned over approximately the other half of the circumferential extent of each of said jackets, the axes of the intermediate bores of the said groups in said first set lying in a plane offset from the plane in which the axes of the intermediate bores of the said groups in said second set lie, the distance between said planes of said intermediate bores being no greater than the diameter of said bores.

9. The valve according to claim 6 wherein said groups of bores each include at least three bores of equal diameter, two ends bores and an intermediate bore aligned in a row parallel to the axes of said jackets, said groups of bores on each of said jackets are arranged in two alternating sets, with a group of one set disposed adjacent to a group of the other set, said sets including a first set of groups of bores in which the end bores of each group are equally spaced from the intermediate bore and a second set of groups of bores in which the end bores of each group are unequally spaced from the intermediate bore, said first set of groups of bores being radially positioned over the entire circumferential extent of each of said jackets and said other end of said groups being radially positioned over the entire circumferential extent of each of said jackets, the axes of the intermediate bores of said groups in said first set lying in a plane offset from the plane in which the axes of the intermediate bores of said groups in said second set lie, the distance between said planes of said intermediate bores being no greater than the diameter of said bores.