Admixture piece and housing element for a mixing device

Patent metadata

Field	Value
Publication number	US-10160138-B2
Application number	US-201213978265-A
Country	US
Kind code	B2
Filing date	Jan 12, 2012
Priority date	Jan 12, 2011
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

A tubular admixture piece for receiving in a mixing device for controlled metering in of an adjuvant into a pumpable mixture has at least one sealing element for producing an at least partially fluid-tight connection between the admixture piece and the mixing device wherein the at least one sealing element is designed as an axial seal with respect to a longitudinal axis of the tubular admixture piece. A housing element of a mixing device has at least a sealing support for axial sealing of the admixture piece, and is also configured to exert a force that acts on the admixture piece in the axial direction and/or longitudinal direction of the through-flow opening, such that the axial seal of an admixture piece received at least partially in the through-flow opening can be pressed against the sealing support by the force.

First claim

The invention claimed is:

1. Tubular admixture piece for receiving in a mixing device for controlled metering of an additive into a pumpable mixture, wherein the admixture piece has a mixing section extending through the admixture piece for conveying the pumpable mixture, and, in a wall of the admixture piece, at least one opening leading into the mixing section is provided, for the purpose of introducing the additive into the mixing section, and wherein, on the admixture piece, at least one sealing element is present for establishing an at least partially fluid-tight connection between the admixture piece and the mixing device, the at least one sealing element being designed in reference to a longitudinal axis of the tubular admixture piece as an axial seal, wherein the axial seal is designed as a ring-shaped sealing lip,
wherein the axial seal is arranged on a front side of a flange formed on the admixture piece,
wherein the axial seal arranged on the front side of the flange is arranged spaced at least partially away from the wall of the admixture piece, so that a groove is present between the axial seal and the wall, wherein the groove comprises a concave curved delimitation surface,
wherein at least one additional sealing element is present, which is spaced in the direction of the longitudinal axis of the tubular admixture piece away from at least one sealing element, and wherein the additional sealing element is also designed as an axial seal and as a ring-shaped sealing lip,
wherein the at least one additional sealing element is oriented closer to the mixing section, in a radial direction of the tubular admixture piece, than the at least one sealing element is to the mixing section, and
wherein both the at least one sealing element and the at least one additional sealing element are oriented so as to point in a same direction.

2. Tubular admixture piece according to claim 1 , wherein a wedge angle of the sealing lip measures 10° - 80°.

3. Admixture piece according to claim 1 , wherein a maximum extent of the additional sealing element in a direction perpendicular to the longitudinal axis of the tubular admixture piece is smaller than a maximum extent of the at least one sealing element.

4. Tubular admixture piece according to claim 1 , wherein at least one sealing element is connected by substance bonding to the admixture piece.

5. Tubular admixture piece according to claim 1 , wherein the admixture piece, in the area of the at least one sealing element, is designed as an axial seal.

6. Tubular admixture piece according to claim 1 , wherein the at least one sealing element forms an integral component of the admixture piece.

7. Tubular admixture piece according to claim 1 , wherein the at least one sealing element, at least in the area of the at least one sealing element, consists of the same material as the admixture piece.

8. Tubular admixture piece according to claim 7 , wherein the admixture piece is manufactured, at least in the area of the at least one sealing element, from a plastic having a Shore A hardness of 50-120.

9. Tubular admixture piece according to claim 1 , wherein the admixture piece consists of a single-piece cast body and a reinforcing element embedded at least partially therein, wherein the cast body consists of a plastic.

10. Tubular admixture piece according to claim 1 , wherein a first surface of the axial seal extending away from the groove extends to a free end of the sealing lip where the first surface meets a second surface of the free end of the sealing lip, and a wedge angle between the first surface and the second surface is from 10° to 80°.

11. Housing element of a mixing device for the controlled injection of an additive into a pumpable mixture, wherein the housing element comprises a base body with a through-flow opening, and the through-flow opening is designed for receiving at least partially an admixture piece according to claim 1 , wherein at least one sealing support—arranged on the housing element—is present for the at least one sealing element of the admixture piece designed as an axial seal, and means are present for exerting a force acting in the axial direction and/or longitudinal direction of the through-flow opening onto the admixture piece, so that the axial seal of an admixture piece received at least partially in the through-flow opening can be pressed by the means for exerting force against the sealing support.

12. Housing element according to claim 11 , wherein, as means for exerting a force onto the admixture piece, a union nut that can be screwed to the base body is present.

13. Housing element according to claim 11 , wherein additionally an additional sealing support arranged in the base body is present for an additional sealing element present on the admixture piece and designed as an axial seal.

14. Housing element according to claim 13 , wherein the at least one sealing support is configured as an inner cone surface and/or the additional sealing support is configured as an outer cone surface.

15. Apparatus set, comprising a tubular admixture piece and a housing element according to claim 11 , wherein the admixture piece has a mixing section extending through the admixture piece for conveying the pumpable mixture, and, in a wall of the admixture piece, at least one opening leading into the mixing section is provided, for the purpose of introducing an additive into the mixing section, and wherein, on the admixture piece, at least one sealing element is present for establishing an at least partially fluid-tight connection between the admixture piece and the mixing device, the at least one sealing element being designed in reference to a longitudinal axis of the tubular admixture piece as an axial seal, wherein the axial seal is designed as a ring-shaped sealing lip,
wherein the axial seal is arranged on a front side of a flange formed on the admixture piece, and
wherein the axial seal arranged on the front side of the flange is arranged spaced at least partially away from the wall of the admixture piece, so that a groove is present between the axial seal and the wall, wherein the groove comprises a concave curved delimitation surface.

16. A method of metering an additive into an pumpable mixture, using a tubular admixture piece for receiving in a mixing device for controlled metering of an additive into a pumpable mixture, wherein the admixture piece has a mixing section extending through the admixture piece for conveying the pumpable mixture, and, in a wall of the admixture piece, at least one opening leading into the mixing section is provided, for the purpose of introducing the additive into the mixing section, and wherein, on the admixture piece, at least one sealing element is present for establishing an at least partially fluid-tight connection between the admixture piece and the mixing device, the at least one sealing element being designed in reference to a longitudinal axis of the tubular admixture piece as an axial seal, wherein the axial seal is designed as a ring-shaped sealing lip,
wherein the axial seal is arranged on a front side of a flange formed on the admixture piece,
wherein the axial seal arranged on the front side of the flange is arranged spaced at least partially away from the wall of the admixture piece, so that a groove is present between the axial seal and the wall, wherein the groove comprises a concave curved delimitation surface,
wherein at least one additional sealing element is present, which is spaced in the direction of the longitudinal axis of the tubular admixture piece away from at least one sealing element, a

Assignees

• Thoma Adrian
• Zehnder Stefan
• Sika Tech Ag

Inventors

• Thoma Adrian
• Zehnder Stefan

Classifications

• B28C5/026 Primary

  Mixing guns or nozzles; Injector mixers (applying plaster by gas pressure E04F21/12; both conveying and distributing concrete E04G21/04; conveying concrete B65G53/32; accelerating or decelerating material flow in troughs or tubes B65G53/58) · CPC title

• B01F5/048

  Operations & Transport · mapped topic

• E04F21/08

  Mechanical implements (E04F21/14 takes precedence; spraying in general B05B; sand-blasting B24C) · CPC title

• B01F25/31423

  with a plurality of perforations in the circumferential direction only and covering the whole circumference · CPC title