WO2011139145A2 - Method, fluid feed assembly and test system - Google Patents
Method, fluid feed assembly and test system Download PDFInfo
- Publication number
- WO2011139145A2 WO2011139145A2 PCT/NL2011/050279 NL2011050279W WO2011139145A2 WO 2011139145 A2 WO2011139145 A2 WO 2011139145A2 NL 2011050279 W NL2011050279 W NL 2011050279W WO 2011139145 A2 WO2011139145 A2 WO 2011139145A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fluid
- fluid supply
- barrier
- supply assembly
- fluid barrier
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/12—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing elastic covers or coatings, e.g. soapy water
Abstract
The present invention relates to a method for testing a fluid-tightness of a fluid barrier, such as a floor of a space for handling chemicals, wherein the method comprises steps for: - applying an overpressure to the underside of the fluid barrier relative to the ambient air pressure; - determining the fluid-tightness by determining the absence of a leakage, such as by means of a bubble forming solution, wherein - the steps for applying the overpressure comprise steps for supplying a fluid from the upper side of the fluid barrier for passage thereof through the fluid barrier and subsequently through the ground below the fluid barrier. The present invention also relates to a fluid supply assembly. The present invention further relates to a test installation.
Description
METHOD, FLUID FEED ASSEMBLY AND TEST SYSTEM
The present invention relates to a method for testing a fluid-tightness of a fluid barrier, such as a floor of a space for handling chemicals. The present invention also relates to a fluid supply assembly for such tests. The present invention also relates to a test installation comprising a fluid supply assembly according to the present invention.
Field of the invention
The present invention relates generally to a method for measuring the degree of impermeability (or conversely: the degree of permeability) of a floor, paving, wall. The present invention relates more particularly relates to method for testing the tightness or permeability of a floor, paving, wall of a hard material such as for instance asphalt, stone or concrete or the like, or a ge- omembrane or geotextile resting on a ground surface of for instance sand, or a sand/cement mixture or the like, wherein air is pumped from above or from the side into the floor/paving/wall construction and, for instance by observing soap bubbles forming on the visible sides of these constructions, a test is performed as to whether air is escaping from the construction. The present invention also relates to testing whether a floor, paving, wall of a filling station, including the conduits passing
therethrough and/or connections optionally arranged therein, have leakages, and will therefore be elucidated below for this possible application. It is however expressly noted that the invention can also be applied in other fields, such as floors, pavings, walls in industry (such as for instance (petro) chemicals, food industry, agricul-
ture, workplaces and the like. For the protection of the environment legal requirements have been laid down with which ground protection constructions must comply in order to prevent harmful and/or toxic substances being able to penetrate through the floor into the ground and/or into the groundwater. It is necessary to check with some regularity whether the floor/paving/wall is fluid-tight, and possibly detected leakages will have to be sealed.
Known prior art installations require components to be introduced into the fluid barrier. Use is for instance made of such a system in the case of liquid-tight floors of filling stations, wherein valves are arranged in the liquid-tight floor to which air hoses can be connected for the purpose of performing a test of the airtightness of the floor.
In order to obviate the drawbacks of the prior art the present invention provides a method for testing a fluid-tightness of a fluid barrier, such as a floor of a space for handling chemicals, wherein the method comprises steps for:
- applying an overpressure to the underside of the fluid barrier relative to the ambient air pressure;
- determining the fluid-tightness by determining the absence of a leakage, such as by means of a bubble- forming solution, wherein
- the steps for applying the overpressure comprise steps for supplying a fluid from the upper side of the fluid barrier for passage thereof through the fluid barrier and subsequently through the ground below the fluid barrier.
A first advantage of such a method according to the present invention is that a fluid pressure is applied only from the surface of the fluid barrier, such as the
liquid-tight floor. The insertion of components into the fluid barrier is not necessary here. Such a method can be performed in simple manner by applying a fluid-sealing member.
According to a first preferred embodiment the method is applied for this purpose using a fluid supply nozzle which can be placed over a known opening or leakage in the fluid barrier, wherein the fluid supply nozzle comprises a sealing member for sealing the fluid supply rela- tive to the fluid barrier. Performing of the method at a relatively high pressure level becomes possible by means of such a sealing member.
A further aspect of the present invention relates to a fluid supply assembly for use in testing a fluid- tightness of a fluid barrier such as a floor of a space for handling chemicals, wherein the fluid supply assembly comprises :
- a frame,
- coupling means mounted on the frame for coupling to a fluid supply from a compressor for the fluid;
- a fluid supply nozzle for feeding a fluid to the fluid barrier; wherein the fluid supply nozzle comprises:
- a sealing member for providing a fluid seal between the fluid supply nozzle and the fluid barrier; and
- fixation means for temporarily fixing the fluid supply assembly relative to the fluid barrier.
It becomes possible by means of such a fluid supply assembly to perform a reliable test on a fluid barrier without components having to be inserted into the fluid barrier. A reliable test of the fluid-tightness hereby becomes possible by means of a simple method according to the present invention.
In a further preferred embodiment according to the present invention the fluid supply assembly comprises one, preferably two underpressure spaces for arrangement relative to the fluid barrier and for holding the fluid supply assembly fixed against the fluid barrier by means of an underpressure. Performing of the method hereby becomes possible in simple manner by loosely placing the fluid supply assembly, subsequently creating underpressure in the underpressure spaces and then introducing a fluid with overpressure into the fluid barrier. A possible leakage in the fluid barrier can then be detected in a manner which is per se known in the prior art.
In a further preferred embodiment the fixation means comprise a mass suitable for holding down the fluid supply assembly during activation of the fluid supply nozzle for the purpose of introducing fluid into the fluid barrier. The fixation of the fluid supply assembly relative to the fluid barrier is hereby realized in alternative manner.
The fixation means alternatively comprise placing means for placing thereon a mass, such as a weight or a person, for the purpose of holding down the fluid supply assembly. During placing a relatively light assembly can hereby be applied which is weighted after placing thereof. The maximum weight of the combination can therefore be reduced.
In a further preferred embodiment the sealing member comprises a substantially annular body comprising a compressible material such as a rubber, open-cell or closed-cell foam, preferably having fluid-sealing properties relative to a rough material of a fluid barrier. A reliable fluid seal can be realized by means of such materials .
The fluid supply assembly more preferably comprises an arrangement of a supply nozzle with an underpressure space on either side. A reliable distribution of the forces is realized by means of such a symmetrical arrangement.
A further aspect of the present invention relates to a test installation for testing a fluid-tightness of a fluid barrier such as a floor of a space for handling chemicals, wherein the fluid supply assembly comprises:
- a compressor for providing a fluid with an over- pressure,
- a fluid supply assembly according to the present invention. Such a test installation provides advantages as described in the foregoing in respect of the method.
The test installation more preferably comprises an underpressure generator for providing an underpressure in an underpressure space.
A further aspect of the present invention relates to a method with use of a fluid supply nozzle and/or a test installation according to the present invention. Such a method provides advantages as indicated in the foregoing and will be further described hereinbelow with reference to a description of preferred embodiments.
Further advantages, features and details of the present invention will be described in greater detail hereinbelow on the basis of one or more preferred embodiments with reference to the accompanying figures.
Fig. 1 is a schematic representation of a first preferred embodiment according to the present invention.
Fig. 2 is a schematic representation of a further preferred embodiment according to the present invention.
Fig. 3 shows three side views of a further preferred embodiment according to the present invention.
A first preferred embodiment (Fig. 1) according to the present invention relates to a test installation 700. The mobile air testing system 700 comprises a suitable air source of sufficient capacity. In this preferred embodi- ment this is a compressor 710 or blower 750 with an outlet connection 711. Outlet connection 711 of the air source is connected by means of a flexible hose 712 of a sufficient diameter to an inlet connection 713 of an air unit 720. Air unit 720 comprises a number of filters 721, 722, 723 coupled in series.
These filters are designed to remove undesirable components such as water, grease and oil from the compressed air provided by air source 710 (in this case a compressor) . Air unit 720 is further provided for the pur- pose of safety requirements with a reduction block 724 and a pressure-relief valve 725. As illustrated, a distributor block 725 with a plurality of outlet connections 726 is preferably mounted on the outlet of the final filter. Outlet connection 726 of distributor block 725 is connected by means of a flexible hose 727 of sufficient diameter to inlet connection 728 of the fluid supply unit 730. Inlet connection 728 is provided with a pressure control valve 729.
The fluid supply unit 730 is positioned above the leakage 740 present or forced in a joint seal. It is noted that connections 711, 713, 726 and 728 are preferably provided with shut-off valves (not shown) .
In the shown application example the paving 20 arranged on ground surface 10 consists of concrete elements 21, 21-1, 21-2. Situated between these concrete elements is a narrow intermediate space or joint 22 in which a seal 23, for instance a plastic sealing compound, is arranged close to the surface of the concrete elements. The fluid
supply unit 730 is positioned above a leakage 740 present or forced in joint seal 23.
Situated on the top side of vacuum chambers 30a and 30b of fluid supply unit 730 is a closable suction valve 32 which is connected by means of a flexible hose 741 to a vacuum unit 740. Suction valve 32 is also provided with a pressure gauge. Inner chamber 30c is an air injection chamber. This chamber 30c is provided on the upper side with an inlet connection 728 for connection to a com- pressor hose 727. As optional provision chamber 30c is also provided on the upper side with a screw cap closure. A supply hose for connection to an alternative fluid supply can be coupled thereto.
Vacuum chambers 30a and 30b and the pressure cham- ber 30c are provided on the underside with a chemically- resistant, flexible sealing profile 31 which can be sealed airtightly and follows the ground surface. The air injection chamber is also provided with a manometer 35.
All suction and pressure valves to vacuum unit 740, compressor 710 and blower 750 connected to the fluid supply unit 730 can be separately closed by means of shut- off valves or screw caps; the valves are not shown in figure 1.
The operation of the fluid supply unit 730 and the method for performing the air test are described hereinbe- low. It is noted that it is not important for the application of this invention whether the fluid barrier to be tested is a new or existing one.
The positioning of the fluid supply unit 730 is first determined by the operator. A starting point here is that air is detectable on the outside of the fluid barrier to be tested. The fluid supply unit 730 is then positioned above a leakage 740 present or forced in joint seal 23.
Pressure chamber 30c must here be situated above the available opening 740. Vacuum is subsequently created by opening closing valve 32 in vacuum charabers 30a and 30b of the fluid supply unit 730, whereby the flexible seals 31 of the fluid supply unit 730 are pressed down in compressed manner by the outside pressure such that an airtight closure is created with the fluid barrier 21, 21-1, 21-2 to be tested.
The air source is then switched on and air is in- troduced under controlled pressure into pressure chamber 30c of the fluid supply unit 730. The supplied air displaces very rapidly under the joint seals 23 via the narrow intermediate space or joint 22 between the parts of paving construction 21, 21-1, 21-2. The concrete elements 21, 21-1, 21-2 are not raised here. Once the check of a part of the floor, paving, wall is completed, the air supply in pressure chamber 30c of the fluid supply unit 730 is closed.
The vacuum in vacuum chambers 30a and 30b of the fluid supply unit 730 is then released. The fluid supply unit 730 is then displaced to an adjacent surface for testing, or the test is ended. The opening 740 which is present or forced for the purpose of the air injection is then sealed with a joint seal in accordance with the cri- teria applicable for this purpose.
A very important advantage of the present invention is that no component at all is inserted into the floor, paving, wall. The system can be deployed directly without location restriction and without being committed to intensive drilling operations.
Figure 2 illustrates an embodiment variant of the fluid supply unit 730. In this embodiment variant use is made of weighting instead of fixation by means of under-
pressure. Pressure chamber 30c is similar to that described with reference to figure 1.
An airtight connection to the floor, paving, wall is generated by applying and maintaining a mechanical load on the fluid supply unit 730 during the test. The method of testing is similar to that described for figure 1.
Figure 3 shows a view of a preferred embodiment of a fluid supply assembly 10 according to the present invention. This fluid supply assembly comprises a frame 11 on which a fluid supply nozzle and two underpressure chambers 14 are mounted. Two handles 17 are also attached to the frame .
The fluid supply nozzle 13 is provided with a sealing ring 12 for the purpose of providing the described seal with fluid barrier 21, 21-1, 21-2. The fluid supply nozzle 13 is also provided with a coupling 18 to hose 727 (figure 1) .
Underpressure chambers 14 are mutually coupled with a connecting pipe 16 for providing a fluid connection for the purpose of providing an equal pressure in both chambers . Both chambers hereby have the same grip on the fluid barrier. The connecting pipe is also provided with coupling means for coupling to conduit 18 or for coupling to a hose 741 (figure 1) .
The present invention has been described in the foregoing on the basis of several preferred embodiments. Different aspects of different embodiments are deemed described in combination with each other, wherein all combinations which can be deemed by a skilled person in the field as falling within the scope of the invention on the basis of reading of this document are included. These preferred embodiments are not limitative for the scope of
protection of this document. The rights sought are defined in the appended claims.
Claims
1. Method for testing a fluid-tightness of a fluid barrier, such as a floor of a space for handling chemi- cals, wherein the method comprises steps for:
- applying an overpressure to the underside of the fluid barrier relative to the ambient air pressure;
- determining the fluid-tightness by determining the absence of a leakage, such as by means of a bubble- forming solution, wherein
- the steps for applying the overpressure comprise steps for supplying a fluid from the upper side of the fluid barrier for passage thereof through the fluid barrier and subsequently through the ground below the fluid barrier.
2. Method as claimed in claim 1 using a fluid supply nozzle which can be placed over a known opening or leakage in the fluid barrier, wherein the fluid supply nozzle comprises a sealing member for sealing the fluid supply relative to the fluid barrier.
3. Fluid supply assembly for use in testing a fluid-tightness of a fluid barrier such as a floor of a space for handling chemicals, wherein the fluid supply assembly comprises :
- a frame,
- coupling means mounted on the frame for coupling to a fluid supply from a compressor for the fluid;
- a fluid supply nozzle for feeding a fluid to the fluid barrier; wherein the fluid supply nozzle comprises:
- a sealing member for providing a fluid seal between the fluid supply nozzle and the fluid barrier; and - fixation means for temporarily fixing the fluid supply assembly relative to the fluid barrier.
4. Fluid supply assembly as claimed in claim 3, wherein the fixation means comprise at least one, preferably two underpressure spaces for arrangement relative to the fluid barrier and for holding the fluid supply assembly fixed against the fluid barrier by means of an underpressure.
5. Fluid supply assembly as claimed in claim 3 or 4, wherein the fixation means comprise a mass suitable for holding down the fluid supply assembly during activation of the fluid supply nozzle for the purpose of introducing fluid into the fluid barrier.
6. Fluid supply assembly as claimed in one or more of the claims 3-5, wherein the fixation means comprise placing means for placing thereon a mass, such as a weight or a person, for the purpose of holding down the fluid supply assembly.
7. Fluid supply assembly as claimed in one or more of the claims 3-6, wherein the sealing member comprises a substantially annular body comprising a compressible material such as a rubber, open-cell or closed-cell foam, preferably having fluid-sealing properties relative to a rough material of a fluid barrier.
8. Fluid supply assembly as claimed in one or more of the claims 3-7, comprising an arrangement of a supply nozzle with an underpressure space on either side.
9. Test installation for testing a fluid-tightness of a fluid barrier such as a floor of a space for handling chemicals, wherein the fluid supply assembly comprises:
- a compressor for providing a fluid with an over- pressure,
- a fluid supply assembly as claimed in one or more of the claims 3-8.
10. Test installation as claimed in claim 9, com- prising an underpressure generator for providing an underpressure in an underpressure space.
11. Method as claimed in claim 1 or 2 with use of a fluid supply nozzle and/or a test installation according to one or more of the foregoing claims 3-10.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL2004590A NL2004590C2 (en) | 2010-04-21 | 2010-04-21 | METHOD, FLUID FEED COMPOSITION AND TEST INSTALLATION. |
| NL2004590 | 2010-04-21 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| WO2011139145A2 true WO2011139145A2 (en) | 2011-11-10 |
| WO2011139145A9 WO2011139145A9 (en) | 2015-06-25 |
| WO2011139145A3 WO2011139145A3 (en) | 2015-10-29 |
Family
ID=42751791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/NL2011/050279 WO2011139145A2 (en) | 2010-04-21 | 2011-04-21 | Method, fluid feed assembly and test system |
Country Status (2)
| Country | Link |
|---|---|
| NL (1) | NL2004590C2 (en) |
| WO (1) | WO2011139145A2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4979390A (en) * | 1988-12-01 | 1990-12-25 | Morris Schupack | Method and apparatus for testing relative permeability of materials |
| EP0933628A1 (en) * | 1998-02-03 | 1999-08-04 | De Zeven Son B.V. | Method for testing the tightness of a floor, as well as test-nipple and mobile air-test-system. |
| EP1160558A2 (en) * | 2000-05-30 | 2001-12-05 | De Zeven Son B.V. | Method for examining the closeness of a seal, as well as a penetrating element for use in the method |
-
2010
- 2010-04-21 NL NL2004590A patent/NL2004590C2/en not_active IP Right Cessation
-
2011
- 2011-04-21 WO PCT/NL2011/050279 patent/WO2011139145A2/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4979390A (en) * | 1988-12-01 | 1990-12-25 | Morris Schupack | Method and apparatus for testing relative permeability of materials |
| EP0933628A1 (en) * | 1998-02-03 | 1999-08-04 | De Zeven Son B.V. | Method for testing the tightness of a floor, as well as test-nipple and mobile air-test-system. |
| EP1160558A2 (en) * | 2000-05-30 | 2001-12-05 | De Zeven Son B.V. | Method for examining the closeness of a seal, as well as a penetrating element for use in the method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011139145A3 (en) | 2015-10-29 |
| NL2004590C2 (en) | 2011-10-25 |
| WO2011139145A9 (en) | 2015-06-25 |
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