WASH LIQUID SPRAY NOZZLES FOR PULP MAT AND METHOD TO ASSEMBLE NOZZLE

Abstract

A nozzle assembly for spraying a wash liquid towards a pulp mat, the assembly including an integral fastener-nozzle having a conduit for the wash liquid, an outlet to the conduit for discharging the wash liquid and an attachment to secure the fastener-nozzle to an aperture in a wash liquid pipe, and a wash liquid direction device extending outwardly from the pipe and adapted to direct the wash liquid from the outlet towards the pulp mat.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a side view of a shower pipe and nozzle assembly, and a section of a pulp mat on a cylindrical dryer.

FIG. 2 is a cross-sectional view of the shower pipe and nozzle assembly, showing just one nozzle assembly.

FIG. 3 is a top view of the lip of the nozzle assembly.

FIG. 4 is an enlarged cross-sectional view of the nozzle assembly showing the hollow nozzle stem attached to an aperture in the pipe, a mounting block for the nozzle assembly, and a portion of the lip of the nozzle assembly.

FIG. 5 is a cross-sectional view of the shower pipe and nozzle assembly taken along line 5-5 in FIG. 1 and showing a side view of a portion of the pulp mat and cylindrical dryer.

FIG. 6 is an exploded isometric view of the nozzle assembly and a portion of the pipe.

Claims

1. A nozzle assembly for spraying a wash liquid towards a pulp mat, the assembly comprising: an integral fastener-nozzle having a conduit for the wash liquid, an outlet to the conduit for discharging the wash liquid and an attachment to secure the fastener-nozzle to an aperture in a wash liquid pipe, anda wash liquid direction device extending outwardly from the pipe and adapted to direct the wash liquid from the outlet towards the pulp mat.

2. A nozzle assembly as in claim 1 wherein the fastener-nozzle includes a threaded outer surface adapted to engage a threaded inner surface of the aperture in the wash liquid pipe.

3. A nozzle assembly as in claim 1 wherein in the fastener-nozzle the attachment and conduit are coaxial.

4. A nozzle assembly as in claim 1 wherein the conduit is in fluid communication with the wash liquid in the pipe.

5. A nozzle assembly as in claim 1 wherein the outlet of the conduit comprises a nozzle for the wash liquid.

6. A nozzle assembly as in claim 1 wherein the fastener-nozzle comprises a hollow stem and the conduit is an internal conduit through the hollow stem.

7. A nozzle assembly as in claim 1 wherein the fastener-nozzle comprises a head on a hollow stem, wherein the head secures the wash liquid direction device to the fastener-nozzle and the conduit is an interior conduit of the hollow stem.

8. A nozzle assembly as in claim 1 further comprising a block between the pipe and wash liquid direction device, wherein the block includes an offset aperture to receive the fastener-nozzle.

9. A nozzle assembly as in claim 1 wherein the wash liquid direction device comprises a lip including a curved fan-shaped surface extending from the outlet of the fastener-nozzle towards the mat.

10. An assembly for spraying a wash liquid onto a pulp mat comprising: a wash liquid pipe extending substantially parallel to the pulp mat and separated by a distance from the pulp mat, wherein the pipe includes a plurality of apertures for discharging wash liquid flowing through the pipe;a plurality of fasteners nozzle arranged along the wash liquid pipe and adapted to direct wash liquid towards the pulp mat;wherein the fasteners nozzle each comprise a hollow stem adapted to be inserted into one of said apertures in the pipe, anda wash liquid direction device extending outwardly from the pipe and adapted to direct the wash liquid from the outlet towards the pulp mat, wherein each wash liquid direction device is secured to the pipe by at least one fasteners nozzle.

11. An assembly as in claim 10 wherein the fasteners nozzle are arranged along at least one row parallel to an axis of the pipe.

12. An assembly as in claim 10 wherein the fasteners nozzle are arranged along the pipe in at least a first row and a second row, and the fasteners nozzle in the first row are staggered with respect to the fasteners nozzle in the second row.

13. An assembly as in claim 10 wherein the stem of each fasteners nozzle is threaded and engages a threaded surface of the corresponding aperture of the pipe.

14. An assembly as in claim 10 wherein the fastener-nozzles each comprise a head on a hollow stem, wherein the head secures the wash liquid direction device to the fastener-nozzle and the conduit is an interior conduit of the hollow stem.

15. An assembly as in claim 10 further comprising a block between the pipe and wash liquid direction device, wherein the block includes an offset aperture to receive the stem of the fastener-nozzle.

16. An assembly as in claim 10 wherein the wash liquid direction device comprises a lip including a curved fan-shaped surface extending from the outlet of one of the fastener-nozzles towards the mat.

17. A method to assemble a nozzle comprising: inserting a hollow stem of a fastener-nozzle through an aperture in a wash liquid direction device;attaching the fastener-nozzle to an aperture in a wash liquid pipe such that the hollow stem is in fluid communication with a wash liquid passage in the pipe and the wash liquid direction device is between the pipe and a head of the stem, andsecuring the fastener-nozzle to the pipe such that the wash liquid direction device is fixed with respect to the pipe by securing the fastener-nozzle.

18. A method as in claim 17 further comprising inserting the stem through a block after inserting the stem through the wash liquid direction device, and wherein securing the fastener-nozzle further comprises abutting an inside surface of the block against the pipe and an outside surface of the block against the wash liquid direction device.

19. A method as in claim 17 wherein securing the fastener-nozzle includes tightening threads on an outer surface of the stem into threads on an inner surface of the aperture in the pipe.

20. A method as in claim 17 wherein the wash liquid direction device is a lip including a flat surface with an aperture to receive the stem and a fan shaped surface to direct wash liquid, wherein securing the fastener-nozzle comprises fixing the flat surface to the pipe.