EP0214224B1

EP0214224B1 - A nozzle for the application of jointing materials

Info

Publication number: EP0214224B1
Application number: EP86901541A
Authority: EP
Inventors: Ulf Gauffin
Original assignee: ALLMAN BYGGNADSSERVICE ABS AB
Current assignee: ALLMAEN BYGGNADSSERVICE AB ABS
Priority date: 1985-02-15
Filing date: 1986-02-04
Publication date: 1989-05-24
Also published as: WO1986004948A1; SE442034B; DK489286A; DK154234B; EP0214224A1; DE3663551D1; FI75638C; DK489286D0; SE8500711L; FI75638B; DK154234C; FI864091A; FI864091A0; SE8500711D0

Abstract

A piping nozzle for applying jointing material in the construction of masonry walls or facades includes a housing having an outlet (12) for jointing material which is introduced under pressure into the housing interior through an inlet (19). In accordance with the invention there is arranged in the housing interior an inlet means (20) which is connected to the inlet and which presents a slot (21) which faces away from the outlet (12); and a dividing means (22) adapted to divide the jointing material exiting through the slot into two flows, which are guided towards the outlet opening for the purpose of mixing the jointing material.

Description

The invention relates to a piping nozzle comprising a housing having an outlet opening for a liquid-containing jointing material which is introduced under pressure into the housing interior through an inlet opening provided in the wall of the housing, by means of a conduit and a tubular inlet means arranged outside the housing and connected to the inlet opening.
Nozzles of this type are known from DE-A-2 050 524 and intended for supplying jointing material, by which is meant here and in the following a pumpable mortar or like substance used to bind together building blocks or like elements in the construction of masonry walls or facades, form part of plant apparatus with which jointing material is pumped from a central storage container to the masonry site through hoses or some other form of conduit.
The device disclosed in DE-A-2 050 524 has tubular inlet means within the housing provided with outlet holes supplying jointing material to the interior of the housing, said housing being provided with outlet pipes for supplying strings of jointing material to the building blocks. One drawback encountered when transporting liquid-containing jointing material from a central station to the piping nozzle used to apply the jointing material in the consruction of a masonry wall or like structure resides in the friction created in the hose or like conduit, this friction causing the mortar conveyed through the conduit to obtain an outer layer comprised of finer material of lower viscosity than the jointing material or mortar located in the centre of the conduit. When the jointing material leaves the said tubular outlet means and said outlet pipes and is laid on respective building blocks, the aforesaid layer of lower viscosity tends to flow outwardly, for example on the outer surface of a facade wall, therewith blemishing said surface.
Accordingly, a prime object of the invention is to provide a piping nozzle which will fully restore, or at least substantially fully restore the mortar to its original consistency and viscosity, and mix the more readily flowing layer of mortar into the more sluggish mass of mortar.
This primary object of the invention is realized fully by means of the invention as defined in Claim 1 and described hereinafter with reference to the accompanying drawings, in which

Fig. 1 illustrates an exemplifying embodiment of a piping nozzle according to the invention used in the construction of a masonry wall;
Fig. 2 is a cross-sectional view taken on the line II-II in Fig. 1;
Fig. 3 is a cross-sectional view taken on the line III-III in Fig. 1; and
Fig. 4 illustrates the cross-section of a modified nozzle.

Figure 1 illustrates part of a masonry wall constructed from building blocks, of which three are referenced 1, 2 and 3. The building blocks are held together by bed joints, for example the bed joints 4, comprising mortar or some other liquid-containing jointing material, and heading joints, such as the illustrated heading joints 5 and 6. The upper building block 1, together with the remaining blocks incorporated in the same horizontal layer as the building block 1, is intended to receive a bedding layer of mortar for a subsequent layer of blocks, and the heading joints between adjacent blocks are to be filled. It is assumed here that the bed joints comprise two mutually parallel strings or beads of mortar applied during movement of the nozzle in the direction of the arrow C, with the aid of two strings of mortar A and B. The piping nozzle of this embodiment comprises a housing 7 having a forwardly located wall 8 (Fig. 2) as seen in the direction of movement C, and a rearwardly located wall 9, which is parallel with the forwardly located wall 8. The two walls 8 and 9 are connected to two mutually parallel, rectangular side- walls 10 and 11, the vertical extension of which is somewhat greater than the vertical extension of the rectangular walls 8 and 9, so as to leave a lower mortar exit opening 12 which presents a centrally located tongue-like scraper device 13, the lower edge part of which lies on the same level as lower, straight or optionally slightly arcuate edges 14, 15 of respective side- walls 10, 11, these edges 14, 15 forming «guides» for the housing 7 and sliding against the building blocks as the nozzle moves therealong. It is assumed here that the forwardly located wall 8, which similar to the rearwardly located wall 9 has a length corresponding substantially to the width D of the building blocks, has a lower edge located on the same level as the aforesaid edges 14 and 15, although this is not absolutely essential and an opening of, for example, the same height as the opening 12 can be left. This side-wall 11 has provided therein an inlet pipe 17 to which there is connected a hose or like conduit 18, through which mortar is conducted from the storage container or silo mentioned in the introduction. Connected to the inlet opening formed by the inlet pipe 17 (Fig. 2 and 3) is a tubular inlet means 20, which in the illustrated embodiment is assumed to have a circular cross-section, as has also the inlet pipe 17, and which extends between the two side- walls 10 and 11 and is terminated by the wall 10. The peripheral part of the inlet means 20 remote from the outlet opening 12 has formed therein an upwardly open slot 21. In the illustrated embodiment this slot has been formed by removing the pipe-wall in a plane such as to obtain a V-shaped opening, the greatest width of the opening being located at the side-wall 10 and its smallest width at the inlet opeing 19. This embodiment is of particular importance when relatively large quantities of mortar are pumped into the housing, the intention being to compensate for the pressure drop occurring along the whole length of the inlet means 20, and thus to cause the same quantity of mortar to flow out along the whole length of the inlet means. However, when extremely thin joints are desired, i.e. joints which in the main simply stick the blocks together, the slot 21 may be given a uniform or at least substantially uniform width. Arranged centrally above and along the slot 21 is a dividing means 22, which in the illustrated embodiment also form the roof of the housing 7 remote from the inlet opening 12. The dividing means 22 of the illustrated embodiment comprises two substantially semi-cylindrical plates 23 and 24, the mutually facing edge parts of which are joined together to form a wedge-shaped edge 25, the apex of which lies along the geometric centre axis of the inlet opening 19 and the inlet pipe 17, and which projects slightly inwardly of the defining line of the inlet opening 19. Two mutually parallel outer edges of the plates 23 and 24 are joined to the forward and rearward walls 8 and 9. When pressurized mortar is forced-up through the slot 21, the mass of mortar is divided by the wedge or V-shaped edge 25 into two substantially equal parts, which follow the inner contours of the plates 23 and 24 and are deflected on both sides of the inlet means 20, to then flow out through the outlet opening 12. The interior of the housing 7 will be filled substantially, with mortar or some other joint material used, and the streams of mortar are thoroughly mixed together, causing the mortar to be so agitated that when leaving the opening 12 the mortar has been restored substantially to its original consistency.
The illustrated arrangement merely constitutes an exemplifying embodiment of the invention, and can thus be modified in various ways. For example, the illustrated dividing means may be replaced with a metal plate bentto a triangular shape, as indicated by the broken line 26 in Fig. 2 and the apex of the triangle may be caused to project into the mass of mortar pumped through the opening 19. Although the dividing means 22 preferably extends along the whole width of the nozzle, as assummed in the aforegoing, said means may be made much shorter, for example half the aforesaid width, while still effectively mixing the mass of jointing material. When the dividing means has the form of a wedge 26, the mass of jointing material will not be subjected to the same preferred deflecting movement as that obtained with the semi-cylinders 23 and 24, although the defining or terminating walls 8 and 9 form requisite guide means. Optionally, the outer walls 8 and 9 of the housing 7 may have the form of part-cylinders, wherewith the guiding and mixing effect obtained is equally as good as that obtained with the dividing means 22. In this case, i.e. when the walls 8 and 9 are curved, part-cylindrical, the upper part may be provided with a single plate directed towards the gap 21, this plate being effective to divide the stream of jointing material flowing through the gap 21 in the manner desired. Such an embodiment is illustrated in Fig. 4, which is a sectional view taken in accordance with Fig. 2. In this later embodiment the two walls 8 and 9 have cylindrical upper parts whose edges are joined together along a line 28 which extends along the gap 21 and which is adjoined by an elongated, planar plate 27, which forms the dividing means.

Claims

1. A piping nozzle comprising a housing (7) having an outlet opening (12) for liquid-containing jointing material which is introduced under pressure into the housing interior through an inlet opening (19) provided in the wall of the housing, by means of a conduit (17, 18) arranged outside the housing (7) and a tubular inlet means (20) and connected to the inlet opening (19), characterized in that said tubular inlet means presents an open slot (21) distal from the outlet opening (12); and in that a dividing means (22; 27) which extends along the slot is arranged to divide the jointing material exiting through the slot (21) into two substantially equal flows of jointing material; and in that the dividing means or the housing is constructed to deflect the two flows of jointing material towards said outlet opening.

2. A nozzle according to Claim 1, characterized in that the width of the slot (21 ) increases in a direction away from the inlet opening (19).

3. A nozzle according to Claim 1 or 2, characterized in that the tubular inlet means (20) is of sustan- tially cylindrical configuration.

4. A nozzle according to any one of Claims 1 to 3, characterized in that the dividing means has the form of a wedge (26), the apex of which is directed towards the geometric centre line of the slot (21 and the base edges of which join with adjacent walls (8, 9) of the housing (7).

5. A nozzle according to any one of Claims 1 to 3, characterized in that the dividing means (22) comprises two part-cylindrical channels (23, 24) which are joined along two mutually parallel edge parts to form a wedge-shaped point (25) which extends along the geometric centre line of the slot (21) and the mutually distal edge parts of which are joined with two mutually opposite walls (8, 9) of the housing (7).

6. A nozzle according to any one of Claims 1 to 3, characterized in that dividing means (27) comprises a planar plate, the one edge of which is directed towards the geometric centre line of the slot (21) and the other edge of which is joined to parts of the housing located above the inlet means (20) and curved towards one another.