GB2226301A - The injection of remedial liquids into structures - Google Patents
The injection of remedial liquids into structures Download PDFInfo
- Publication number
- GB2226301A GB2226301A GB8926850A GB8926850A GB2226301A GB 2226301 A GB2226301 A GB 2226301A GB 8926850 A GB8926850 A GB 8926850A GB 8926850 A GB8926850 A GB 8926850A GB 2226301 A GB2226301 A GB 2226301A
- Authority
- GB
- United Kingdom
- Prior art keywords
- liquid
- remedial
- injection
- rod
- cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/06—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies
- B05B13/0627—Arrangements of nozzles or spray heads specially adapted for treating the inside of hollow bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening
- B05B1/16—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening having selectively- effective outlets
- B05B1/1627—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening having selectively- effective outlets with a selecting mechanism comprising a gate valve, a sliding valve or a cock
- B05B1/1636—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening having selectively- effective outlets with a selecting mechanism comprising a gate valve, a sliding valve or a cock by relative rotative movement of the valve elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F11/00—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
- G01F11/02—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement
- G01F11/04—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement of the free-piston type
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Catching Or Destruction (AREA)
Abstract
Remedial liquids may be injected into structures, for example for the prevention or treatment of damp, or of insect or fungal infestations of buildings or parts of them by means of an injector comprising an outer hollow rod (24) housing an inner hollow rod, the outer rod having apertures intermediate its ends and the inner at its end, both rods being capable of being separately fed with remedial liquid under pressure whereby a double leaf wall may be treated, or comprising a pivotable spray head, pivoting movement being causable by slidable movement of a flexible supply conduct within a curved rigid outer tube whereby the spray head may be inserted through a hole in flooring and pivoted by movement of the flexible tube into an upstanding position whereby it may spray upwardly onto the underneath of floorboards. Either injection means may be fed by a unit comprising two mechanically interlinked three-port valves (7, 8), means connecting one port on each valve to a source of liquid under pressure (15), means connecting a second port (11, 11') on each valve to opposite ends of a double-acting cylinder (1) and delivery conduit means (12, 12') connected to each third port, the mechanical interlinking being such that at anytime one valve connects the source of liquid to a first end of the cylinder whilst the other valve connects the second end of the cylinder to the delivery conduit whereby a measured unit dose of liquid corresponding to the volume of the cylinder may be fed alternately through each delivery conduit. <IMAGE>
Description
The injection of remedial liquids into structures The present invention relates to injection apparatus and, more particularly, to apparatus specifically designed for the injection of liquids into structures for remedial purposes as in the prevention or treatment of damp or of insect or fungal infestation of buildings or the like together with methods of operation of such apparatus to achieve said injection. Liquids suitable for such purposes are hereafter referred to as "remedial liquid".
The apparatus of the present invention comprises three units, which may be used separately or in a suitable combination. The units are designed to be used in conjunction with a pump or the like providing treatment liquid (of an appropriate composition) at an appropriate pressure. Such pumps are well known and form no part of the present invention.
One proble:: frequently met with in this type of work is the need to deliver a measured unit dose of liquid, since insufficient liquid is ineffective whilst excess liquid is inefficient. Metering pumps are expensive and, under the conditions of use, timers are not reliable.
The first unit of the invention is designed to supply a constant volume of treatment liquid and comprises remedial liquid delivery means arranged for connection to a source of remedial liquid under pressure and to remedial liquid injection means, the delivery means comprising two mechanically interlinked three-port valves, a double acting cylinder of a vo'm~~e suitable to definea unit deliverv of remedial liquid, reans arranged for the connection of one port on each valve to a source of remedial liquid, means arranges for the connection of a second port on each valve to opposite ends of a aouble-actin cylinder, means arranged for the connection of the third port on each valve to said injection means and mechanical interlinking means capable of operation to alternately connect the source of remedial liquid to each end of the cylinder while the other end of the cylinder is connected to the injection means.
Desirably indicator means, such as a pointer, is associated with the piston rod of the cylinder so as to show when a. full unit delivery has been made. Audible warning means may also be provided.
The two delivery conduits may be connected together.
They may also include valve means.
In operation the delivery conduits are connected to a nozzle or nozzles and when the valve in this conduit is opened to cause a low pressure on one side of the piston this in turn causes the other side of the cylinder to be filled with the liquid. When the position of the three-port valves is reversed, the liquid under pressure is supplied to the empty cylinder and forces the full cylinder to be discharged through the nozzle.
The second unit is designed for treatment of walls by the injection of liquid so as, for example, to provide dampproofing. Normal house wails in the United Kingdom are made of house bricks which are 4.5 inches thick and the wall is two bricks thick. A cavity of up to 1.5 inches thick may be provided between the two leaves of the wall. Thus normal walls may be between 9 inches and 10.5 inches thick, plus a layer of plaster on the inner surface and possibly a layer of rendering on the outer surface. The injection of dampproofing liquid is preferably made from the exterior and it is obviously convenient to provide an injection rod capable of dealing with a wide variation in wall thicknesses.
According to this aspect of the invention, an injection rod arranged for connection via a remedial liquid delivery means to a source of remedial liquid under pressure comprises an outer hollow rod housing an inner hollow rod, the two rods being connectable to remedial liquid supply means, one rod having liquid release apertures intermediate its ends and the other rod having liquid release apertures at its end, the two rods being liquid-tightly sealed together, in combination with a selectable plurality of depth limiting sleeves for the outer rod.
Conveniently an extension piece for the two rods may be interposable, as by screwing, between the two sets of liquid release apertures to adjust their relative spacing.
In use a hole of suitable dimensions and depth is drilled into the wall. If necessary the spacing of the liquid release apertures is adjusted to the wall construction and also if necessary a sleeve of suitable dimensions is slid onto the outer rod to limit penetration into the wall. The rods are then connected to suitable valves and thence to suitable sources of treatment liquid, for example a unit as first described. If two injections are needed as in the treatment of double leaf walls, the two valves are then operated, preferably sequentially. If only one injection is needed, only one valve is used.
The third unit of the present invention is designed to spray cavities in a building for example the area below a suspended floor without the need to remove the floorboards which Inevitably causes de. . It comprises a curved rigid lance having a nozzle pivotally conected to one end in such a way that the nozzle can move from an in-line position to an upstanding position, the lance housing a flexible tube supplying the nozzle, endwise movement of the tube within the lance being capable of moving the nozzle between its two positions.
Very desirably a part of the lance adjacent the nozzle is cut away to permit the flexible tube to take up a suitable curve when the nozzle is in the upstanding position.
In use the lance, with the nozzle in the in-line cs - tIc, is introducedbelow tre floorboards by means of a suitable hole drilled between the joists, an adjustable stop on the lance conveniently beIng provided to ensure penetration to the correct depth. The upper end of the flexible tube is connected te a rigid tube capable of endwise sliding movement within the upper end of the lance, being guided by a suitable bush, to effect the necessary movement of the nozzle. This rigid tube can carry a suitable valve.
The part of the lance above the stop can carry a handle to facilitate control of the lance.
In order to use this unit, it is connected to a suitable source of treatment liquid under pressure, suitably the delivery conduits of a unit as first above described.
The lance is introduced through a hole in the floorboards to a depth controlled by the stop and is correctly located using the handle. The rigid tube is then depressed relative to the lance to effect endwise movement of the flexible tube and cause the nozzle to adopt its upstanding position and the valve is then opened to deliver a measured volume of treatment liquid through the nozzle to the underside of the floorboards. The lance is then re-positioned for the next delivery.
The apparatus provided by the present invention is more specifically described below with reference to the following drawings of which:
Figure 1 is a diagramatic part sectional view of the first unit of the invention.
Figure 2 is a diagramatic part sectional elevational view of the second unit of the invention inserted within a double leaf wall.
Figure 3 is a diagramatic elevational view of a portion of third unit of the invention in its upstanding use position.
The apparatus depicted in Figure 1 comprises a two-way cylinder 1 connected from the ends 2 and 3 via delivery conduits 4 and 5 (shown diagramatically) to an assembly 6 of two 3 port valves.The assembly comprises 3 port valves 7 and 8, each zor,prisirg a pivotable valve cylinder 9, 9' containing an - shaped orIfice 10, 1G' the cylinders being pivotable to connect the ends of the orifice 10, 10' to two of entry/exit ports 11, 11', delivery ports 12,12' and supply conduits 13113'.Supply port 14 is connectable via delivery conduit 15 to a source of remedial liquid under pressure.As depicted the piston 16 of the two way cylinder is operating in the direction shown by the arrow driven by a flow of remedial liquid under pressure supplied through supply conduit 13, port 11 and delivery conduit 5. The effect of this is to deliver remedial liquid through delivery conduit 4, port l1'and port 12'. The 3 way valves are rotatable to their alternate positions when the unit delivery has been completed by piston 16 by means of mechanical interlinking means (not shown) to cause the piston 16 to move in the opposite direction and to make a unit delivery of remedial liquid through port 12.
The apparatus depicted in Figure 2 comprises an injection apparatus 21 inserted in its operating position within a drilled cavity 20 in double leaf masonry wall 22 having a cavity 23. The apparatus comprises an outer hollow rod 24 having apertures 25, housing an inner hollow rod 26 having an aperture 27. The depth to which the rod assemby extends within the cavity 20 is determined by stop member 28 and may be adjusted by additional sleeves (not shown) if required. The distance between the apertures 25 and 27 may also be varied by the it2rpcsitio of an extension piece (not shown). The two inlet appertures 28, 29 may be separately valved and may be connected to a source of remedial liquid under pressure so that said liquid may be delivered to the two wall leafs though the apertures 25 and 27.
It is a particularly advantageous embodiment of the invention that apertures 25 and 27 may be connected to the two delivery ports 12 and 12' of the unit of Figure 1 so as to deliver alternate unit doses of remedial liquid through apertures 25 and 27.
T.e a- > aratus depicted in Figure 3 is an injection unit 31 designed to spray remea~a' liquid Fn=o cavities in a building for example below a suspended floor. The injection unit may comrrise a hollow tube curved through 900 so that, if the rod is inserted downwardly through a hole 30 in a floorboard, the end of the injector 31 assumes a horizontal position. The spray head 32 is mounted on the injector 31 by pivot mount 33 and is connected to flexible delivery conduit 34.
The delivery conduit 34 is loosely enclosed within the tubular injector member 31, is slidable axially therewithin and extends within the hollow tube 31 through the hole in the floorboard. The end of the delivery conduit distant from the spray head may be connected to a source of remedial liquid under pressure which may, advantageously, be a unit as depicted in figure 1 which is capable of dispensing measured unit doses thereto. The injection unit may be inserted through the floorboard with its spray head in line with the end of the tube 31. If the delivery conduit 34 is then moved slidably through the tube 31 in the direction of the spray head the effect is to cause the spray head to pivot to position 32', since the end of the conduit, due to the freedom of lateral movement allowed by cut-away portion 35 of the tube 31, tends to cause this by moving into position 34'. In this upstanding position 32' the apparatus may spray efficiently upwardly onto the underneath of floor member 36.
Claims (11)
1. Apparatus for use in the injection of remedial liquid
into the structure of a building the apparatus
comprising remedial liquid delivery means arranged for
connection to a source of remedial liquid under
pressure and to remedial liquid injection means, the
delivery means comprising an arrangement of two
mechanically linked three port valves, a double acting
cylinder, means arranged for the connection of one port
on each valve to the source of remedial liquid, means
arranged for the connection of a second port on each
valve to opposite ends of the double acting cylinder,
means arranged for the connection of the third port on
each valve via a delivery conduit to injection means
and mechanical valve interlinking means capable of
operation to alternately connect the source of remedial
liquid to each end of the cylinder while the other end
of the cylinder is connected to the injection means thereby te deliver a succession of measured its cf the remedial liquid to said injection means.
2. Apparatus as claimed in claim 1 including indicator
means associated with the piston rod of the cylinder so
as to show when a full unit delivery of remedial liquid
has been made.
3. Apparatus for use in the injection of remedial liquid
into the structure of a building the apparatus comprising a remedial liquid inJection rod arranged for c~....ect-c via a remedial liquid delivery means to a
source of remedial liquid under pressure, the Injection
rod comprising an outer hollow rod housing an inner
hollow rod, the two rods being connectable to remedial
liquid supply means, one rod having liquid release
apertures intermediate its ends and the other rod
having liquid release apertures at its end, the two
rods being liquid-tightly sealed together, in
combination with a selectable plurality of depth
limiting sleeves for the outer rod.
4. Apparatus as claimed in claim 3 wherein the outer rod
has liquid release apertures intermediate its ends and
the inner rod has liquid release apertures at its end.
5. Apparatus as claimed in claim 3 or 4 wherein the inner
and outer rods are separately connectable to a source of
a measured dose of remedial liquid.
6. Apparatus as claimed in claim 5 wherein the source of
the said measured dose is apparatus as claimed in claim
1 of which each end of the cylinder is connectable to a
different one of the inner and the outer rods of the
injection means thereby to supply alternate unit
deliveries of remedial liquid to each rod.
7. Apparatus for use in the injection of remedial liquid
into cavities in the structure of a building the
apparatus comprising a remedial liquid injection rod
arranged for connection via a remedial liquid delivery
means to a source of remedial liquid under pressure,
the injection rod comprising a curved rigid lance
having a nozzle pivotally connected to one end in such
a way that the nozzle can move from an in-line position
to an upstanding position, the lance having a flexible
tube supplying the nozzle, endwise movement of the tube
within the lance being capable of moving the nozzle
between its two positions.
8. Apparatus as claimed in claim 7 wherein a part of the
lance adjacent the nozzle is cut away to permit the
flexible tube to take up a suitable curve when the
nozzle is in the upstanding position.
9. Apparatus as claimed in claim 8 wherein the delivery
means is apparatus as claimed in claim 1 whereby
measured units of remedial liquid may be dispensed
from the lance.
W. Apparatus for use in the injection of remedial liquid
into the structure of a building substantially as
described herein and as claimed in anyone of claims 1,
3 or 7.
11. A method of treating the structure of a building
comprising applying remedial liquid thereto by means of
apparatus as claimed in any one of claims 1 to 9.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB888828105A GB8828105D0 (en) | 1988-12-01 | 1988-12-01 | Injection apparatus |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8926850D0 GB8926850D0 (en) | 1990-01-17 |
| GB2226301A true GB2226301A (en) | 1990-06-27 |
| GB2226301B GB2226301B (en) | 1993-01-13 |
Family
ID=10647814
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB888828105A Pending GB8828105D0 (en) | 1988-12-01 | 1988-12-01 | Injection apparatus |
| GB8926850A Expired - Fee Related GB2226301B (en) | 1988-12-01 | 1989-11-28 | The injection of remedial liquids into structures |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB888828105A Pending GB8828105D0 (en) | 1988-12-01 | 1988-12-01 | Injection apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB8828105D0 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2282084A (en) * | 1993-09-23 | 1995-03-29 | Remtox Chemicals Limited | Liquid Injector |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB698685A (en) * | 1950-11-01 | 1953-10-21 | Danco Exp & Imp Ltd | Apparatus for delivering measured quantities of liquid |
| GB807338A (en) * | 1954-11-02 | 1959-01-14 | Unilever Ltd | Automatic filling devices for liquid or plastic substances |
| GB901850A (en) * | 1960-01-26 | 1962-07-25 | Gaskell & Chambers Ltd | Improvements in or relating to liquid dispensing apparatus |
| GB934456A (en) * | 1961-06-27 | 1963-08-21 | Gaskell & Chambers Ltd | Liquid dispensing apparatus |
| GB935572A (en) * | 1961-06-19 | 1963-08-28 | Gaskell & Chambers Ltd | Improvements in or relating to liquid dispensing apparatus |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1402759A (en) * | 1972-06-26 | 1975-08-13 | Huskisson W H | Diffusion unit |
| SE390827C (en) * | 1976-03-22 | 1980-08-11 | Astra Dinol Ab | PROCEDURE FOR APPLICATION OF AN ANTI-PROTECTIVE EQUIPMENT IN RIGHT SAVEL AS A CROCKET HALL ROOM MEDIUM SPRAYING |
| GB1515162A (en) * | 1976-10-07 | 1978-06-21 | Pynford Ltd | Stabilization of cavity walls |
| GB2137273B (en) * | 1983-03-30 | 1986-08-06 | Alan Geoffrey Barnett | Improvements in or relating to wall ties |
-
1988
- 1988-12-01 GB GB888828105A patent/GB8828105D0/en active Pending
-
1989
- 1989-11-28 GB GB8926850A patent/GB2226301B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB698685A (en) * | 1950-11-01 | 1953-10-21 | Danco Exp & Imp Ltd | Apparatus for delivering measured quantities of liquid |
| GB807338A (en) * | 1954-11-02 | 1959-01-14 | Unilever Ltd | Automatic filling devices for liquid or plastic substances |
| GB901850A (en) * | 1960-01-26 | 1962-07-25 | Gaskell & Chambers Ltd | Improvements in or relating to liquid dispensing apparatus |
| GB935572A (en) * | 1961-06-19 | 1963-08-28 | Gaskell & Chambers Ltd | Improvements in or relating to liquid dispensing apparatus |
| GB934456A (en) * | 1961-06-27 | 1963-08-21 | Gaskell & Chambers Ltd | Liquid dispensing apparatus |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2282084A (en) * | 1993-09-23 | 1995-03-29 | Remtox Chemicals Limited | Liquid Injector |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8926850D0 (en) | 1990-01-17 |
| GB8828105D0 (en) | 1989-01-05 |
| GB2226301B (en) | 1993-01-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19981128 |