WO2000057140A1 - Instrument for concrete volume measurement - Google Patents

Instrument for concrete volume measurement Download PDF

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Publication number
WO2000057140A1
WO2000057140A1 PCT/IL2000/000169 IL0000169W WO0057140A1 WO 2000057140 A1 WO2000057140 A1 WO 2000057140A1 IL 0000169 W IL0000169 W IL 0000169W WO 0057140 A1 WO0057140 A1 WO 0057140A1
Authority
WO
WIPO (PCT)
Prior art keywords
cement
concrete
grout
tubular segment
section
Prior art date
Application number
PCT/IL2000/000169
Other languages
French (fr)
Inventor
Magali Shachar
Original Assignee
Magali Shachar
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Magali Shachar filed Critical Magali Shachar
Publication of WO2000057140A1 publication Critical patent/WO2000057140A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/10—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects using rotating vanes with axial admission
    • G01F1/11—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects using rotating vanes with axial admission with mechanical coupling to the indicating device
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
    • G01F1/78—Direct mass flowmeters

Definitions

  • Concrete is a mixture of aggregates, send, cement, additives and water. Those materials are rough, non uniform, abrasive and not captured. Concrete is not liquid nor solid. As a result, most the techniques of volume meters are not applicable.
  • measuring the concrete volume is carried out by weighing and dividing the result by the specific gravity. If concrete is pumped inside a pipe, and it is required to measure the volume of pumped concrete, it is customary to apply one of the two methods specified in the following:
  • the concrete discharge measurement system measures the pressure in the pipe and with mathematical tools, detects the waves and counts them. Multiplying the number of waves by the volume of concrete pumped in each stroke gives the volume of concrete flown in the pipe.
  • the first method (counting waves) is very much dependent on the mathematical parameters. Each concrete pump has its own properties therefore several parameters should be adjusted to it accordingly. Any change in the concrete pump requires re-calibration of the system. There are situations where the waves, as they are received by the pressure gauges, are distorted so that the mathematical system will not identify them well - and the result of the concrete volumes flown into the pipe will be distorted too.
  • the measurement resolution of the system is a single wave - volume of concrete pumped through one strike of a piston. This volume is usually about 50 liter. In many cases a better distinction is required.
  • the second method is sensitive to the magnetic properties of the concrete components therefore it requires a different calibration for each sources of concrete supply.
  • the velocity of concrete flow varies constantly per cycle time of approximately 2 seconds. In most cases, the measurement system is incapable of keeping track of the rapid changes in the flow rate therefore it averages the results. Hence this method depends on the working frequency of the concrete pump and the ability of distinction of the method that equals the volume of one pump stroke which is about 50 liter.
  • the electromagnetic measurement system is expensive both to buy as well as to maintain.
  • the invention offered herewith discusses an instrument to measure the volume of concrete flown in a pipe.
  • the instrument is simple, inexpensive, reliable, precise arid totally independent of the technique of concrete pumping.
  • Concrete discharge gauge consisting of two main parts plus several secondary parts.
  • the first main part is a segment of pipe located in the route of the concrete flow (Fig. No. 1 Part (1)).
  • This tubular segment may be rotated around its longitudinal axis.
  • the pipe segment consists of rips which main direction is in a certain pitch angle towards the longitudinal axis of the tubular segment.
  • the rips may be regarded as an inside thread in the tubular segment.
  • the rips are built in a way that the concrete flows in the tubular segment results in a rotation of the latter around its main axis.
  • the tubular segment together with the rips may be regarded as a turbine (spiral) core - linear motion of concrete along the main axis results in a rotary motion of the tubular segment, along with the rips, around its longitudinal axis.
  • the rips may be male (protruding to the inner space of the tubular segment) and/or female (shaped as a recess embedded in the inner wall of the tubular segment).
  • the second main part is a tachometer (encoder) (Fig No. 1 Part (3)).
  • the tachometer measures the rotary motion of the tubular segment around its main axis. Since the rotary motion is proportional to the volume of concrete passing through the tubular segment - measuring the rotary motion is equivalent to measuring the volume of concrete passing through the tubular segment.
  • Measuring the rotary motion may be done through an encoder (per Fig. No. 1 ), and/or proximity switch, and/or resolver and/or any other way. Passing the motion (if any) between the tubular segment and the rotary motion measurement system may be achieved through a belt (Fig. No. 1 Part (4)), chain, wheel or any other way.
  • the rotary motion may be measured with no physical contact between the tubular segment and the measurement system, e.g., using a proximity switch and/or using an electro-optic system and/or any other way.
  • the secondary parts are seals/bearings (Fig. No. 1 Part (2)), housing (Fig. No. 1 Part (5)), connectors, bolts and the like.
  • the secondary parts are used for the physical and/or mechanical and/or maintenance purposes of the concrete discharge gauge.
  • Preventing the passage of concrete outside the piping system may be achieved by sealing between two identical metals, between two different metals, between a metal and a plastic and/or polymer, between two identical and/or different plastics and/or polymers or any other way.
  • the concrete discharge gauge does not necessarily have to be completely sealed - it will function well even if there is a certain leakage of concrete and/or concrete components from the concrete carrying pipes. As long as the amount of concrete and/or concrete components leaking from the concrete carrying piping system through the concrete discharge gauge seals is not a problem by itself and does not affect the performances of the concrete discharge gauge - no maintenance operation is required and one may continue measuring the concrete discharge as usual. The leakage has to be cleaned and removed as per common with concrete and moving parts.
  • Fig No. 1 describes a principal structure of the concrete volume meter.
  • the easiest way to build the concrete volume meter is as per Fig. No. 1.
  • the seals/bearings (Fig. No. 1 Part (2)) as to be built from polymer, the belt (Fig. No. 1 Part (4)) is a common automobile one, the encoder (Fig. 1 Part (3)) may be any general purpose one with suitable resolution, and the rest of the parts are steel made.
  • the dimensions are as needed per functions and strength purposes and as it is customary.
  • the concrete volume meter has to be connected along the concrete pipe.
  • the inner diameter of the concrete pipe has to be as closed as possible to the inner diameter of the tubular rotating part. It will be convenient to have some openings in the housing (Fig. No. 1 Part (5)) for concrete cleaning purposes.
  • the current invention is useful for any application it which the concrete is supplied through a pipe, and the volume of the consumption is needed.

Abstract

This invention supplies a solution for direct, accurate and reliable tool for measuring the volume of concrete flowing through a tube. The main part is a segment (1) of pipe located in the route of the concrete flow. This tubular segment may be rotated around its longitudinal axis. The pipe segment consists of rips which main direction is in a certain pitch angle towards the longitudinal axis of the tubular segment. The rips are built in a way that the concrete flows in the tubular segment results in a rotation of the latter around its main axis. Since the rotary motion is proportional to the volume of concrete passing through the tubular segment, measuring the rotary motion is equivalent to measuring the volume of concrete passing through the tubular segment. Measuring the rotary motion is done through an encoder (3).

Description

Instrument for concrete volume measurement
Wherever it says "concrete", it should be read as "concrete and/or mortar and/or cement and/or grout and/or lime and/or cement water and/or cement grout".
Technical Field
In many cases the volume of the poured concrete is important. In the field of foundation it is some times critical. In spite of the need, there is no easy and reliable way to measure the volume of the consumed concrete.
Concrete is a mixture of aggregates, send, cement, additives and water. Those materials are rough, non uniform, abrasive and not captured. Concrete is not liquid nor solid. As a result, most the techniques of volume meters are not applicable.
Background Art
In most cases, measuring the concrete volume is carried out by weighing and dividing the result by the specific gravity. If concrete is pumped inside a pipe, and it is required to measure the volume of pumped concrete, it is customary to apply one of the two methods specified in the following:
1. In most cases, concrete is pushed inside the pipe by a pump. The most common type of pumps is based on the principle of pistons pushing the concrete intermittently. As one piston pushes the concrete inside the pipe, the other is filled up with concrete and so on and so forth.
Due to the batch-like operation of the concrete pump as well as switching the two pistons, pressure waves are generated inside the concrete pipe. The concrete discharge measurement system measures the pressure in the pipe and with mathematical tools, detects the waves and counts them. Multiplying the number of waves by the volume of concrete pumped in each stroke gives the volume of concrete flown in the pipe.
2. Electromagnetic measurements using the fact that concrete flow in a magnetic (electric) field changes the electric (magnetic) field in a way that depends on the velocity of flow.
Each of the aforementioned two methods has their own drawback:
The first method (counting waves) is very much dependent on the mathematical parameters. Each concrete pump has its own properties therefore several parameters should be adjusted to it accordingly. Any change in the concrete pump requires re-calibration of the system. There are situations where the waves, as they are received by the pressure gauges, are distorted so that the mathematical system will not identify them well - and the result of the concrete volumes flown into the pipe will be distorted too.
The measurement resolution of the system is a single wave - volume of concrete pumped through one strike of a piston. This volume is usually about 50 liter. In many cases a better distinction is required.
The second method (electromagnetic) is sensitive to the magnetic properties of the concrete components therefore it requires a different calibration for each sources of concrete supply.
The velocity of concrete flow varies constantly per cycle time of approximately 2 seconds. In most cases, the measurement system is incapable of keeping track of the rapid changes in the flow rate therefore it averages the results. Hence this method depends on the working frequency of the concrete pump and the ability of distinction of the method that equals the volume of one pump stroke which is about 50 liter.
The electromagnetic measurement system is expensive both to buy as well as to maintain.
The invention offered herewith discusses an instrument to measure the volume of concrete flown in a pipe. The instrument is simple, inexpensive, reliable, precise arid totally independent of the technique of concrete pumping.
Disclosure of Invention
Concrete discharge gauge consisting of two main parts plus several secondary parts.
The first main part is a segment of pipe located in the route of the concrete flow (Fig. No. 1 Part (1)). This tubular segment may be rotated around its longitudinal axis. The pipe segment consists of rips which main direction is in a certain pitch angle towards the longitudinal axis of the tubular segment. The rips may be regarded as an inside thread in the tubular segment. The rips are built in a way that the concrete flows in the tubular segment results in a rotation of the latter around its main axis. The tubular segment together with the rips may be regarded as a turbine (spiral) core - linear motion of concrete along the main axis results in a rotary motion of the tubular segment, along with the rips, around its longitudinal axis.
The rips may be male (protruding to the inner space of the tubular segment) and/or female (shaped as a recess embedded in the inner wall of the tubular segment). The second main part is a tachometer (encoder) (Fig No. 1 Part (3)). The tachometer measures the rotary motion of the tubular segment around its main axis. Since the rotary motion is proportional to the volume of concrete passing through the tubular segment - measuring the rotary motion is equivalent to measuring the volume of concrete passing through the tubular segment.
Measuring the rotary motion may be done through an encoder (per Fig. No. 1 ), and/or proximity switch, and/or resolver and/or any other way. Passing the motion (if any) between the tubular segment and the rotary motion measurement system may be achieved through a belt (Fig. No. 1 Part (4)), chain, wheel or any other way.
The rotary motion may be measured with no physical contact between the tubular segment and the measurement system, e.g., using a proximity switch and/or using an electro-optic system and/or any other way.
The secondary parts are seals/bearings (Fig. No. 1 Part (2)), housing (Fig. No. 1 Part (5)), connectors, bolts and the like.
The secondary parts are used for the physical and/or mechanical and/or maintenance purposes of the concrete discharge gauge.
There is no restriction and/or special requirement associated with the secondary parts as long as they meet the strength requirements, allow the rotation of the tubular segment around its longitudinal axis and prevent passage of considerable amounts of concrete from the piping system. Preventing the passage of concrete outside the piping system may be achieved by sealing between two identical metals, between two different metals, between a metal and a plastic and/or polymer, between two identical and/or different plastics and/or polymers or any other way.
The concrete discharge gauge does not necessarily have to be completely sealed - it will function well even if there is a certain leakage of concrete and/or concrete components from the concrete carrying pipes. As long as the amount of concrete and/or concrete components leaking from the concrete carrying piping system through the concrete discharge gauge seals is not a problem by itself and does not affect the performances of the concrete discharge gauge - no maintenance operation is required and one may continue measuring the concrete discharge as usual. The leakage has to be cleaned and removed as per common with concrete and moving parts.
Brief Description of Drawing
Fig No. 1 describes a principal structure of the concrete volume meter.
Best Mode of Carrying Out the Invention
The easiest way to build the concrete volume meter is as per Fig. No. 1. The seals/bearings (Fig. No. 1 Part (2)) as to be built from polymer, the belt (Fig. No. 1 Part (4)) is a common automobile one, the encoder (Fig. 1 Part (3)) may be any general purpose one with suitable resolution, and the rest of the parts are steel made.
The dimensions are as needed per functions and strength purposes and as it is customary.
The concrete volume meter has to be connected along the concrete pipe. The inner diameter of the concrete pipe has to be as closed as possible to the inner diameter of the tubular rotating part. It will be convenient to have some openings in the housing (Fig. No. 1 Part (5)) for concrete cleaning purposes.
Industrial Applicability
The current invention is useful for any application it which the concrete is supplied through a pipe, and the volume of the consumption is needed.
In general construction, that information is important for material calculations, process quality control, "as made" reports, accounting, site managing and safety. In the piling (foundation) industry there are some techniques is which the knowledge of the accurate volume of the used concrete is necessary. The quality control of Continue Flight Auger as well as of Cast in Place piles is some times based on concrete volume balancing.

Claims

Claims
1. Instrument to measure the discharge of concrete and/or mortar and/or cement and/or grout and/or lime and/or cement water and/or cement grout, by using a tubular segment located in the route of flow of concrete and/or mortar and/or cement and/or grout and/or lime and/or cement water and/or cement grout, containing inner rips, positioned at a certain pitch angle to the main direction of motion of the concrete and/or mortar and/or cement and/or grout and/or lime and/or cement water and/or cement grout, causing it to rotate around its longitudinal axis as the concrete and/or mortar and/or cement and/or grout and/or lime and/or cement water and/or cement grout flows through it.
The angle of rotation of the tubular segment around its longitudinal axis is proportional to the volume of concrete and/or mortar and/or cement and/or grout and/or lime and/or cement water and/or cement grout passing through it.
2. Like section 1 above, yet as measuring the angle of rotation of the tubular segment around its main axis is done through a tachometer receiving the rotary motion through some kind of a mechanical system.
3. Like section 1 above, yet as measuring the angle of rotation of the tubular segment around its main axis is done through instrument not physically connected to the tubular segment, e.g., proximity switch and/or switches, electro-optical system and/or systems or any other way.
4. Like section 1 -3 above, yet as the tubular segment is built of a single unit or several units. The concoction between the units may be parallel to the main axis of the cylindrical segment and/or perpendicular to it and/or in any other relative angle to it.
5. Like section 4 above, yet as a certain amount of concrete and/or mortar and/or cement and/or grout and/or lime and/or cement water and/or cement grout and/or of their components and/or of several components of them leak from the concrete carrying system at the time of measuring the discharge and/or as a result of measuring the discharge.
6. Like section 4 above, yet as the sealing between the tubular segment rotating as the concrete and/or mortar and/or cement and/or grout and/or lime and/or cement water and/or cement grout flows and the part and/or parts that are not rotating is done through a contact between two identical metals, between two different metals, between a metal and a plastic and/or polymer, or between two identical and/or different plastics and/or polymers, or with no contact at all between them.
7. Like section 4 above, yet as the rips protrude from the inner wall of the tubular segment inwards.
8. Like section 4 above, yet as the rips are niches located on the inner wall of the tubular segment.
9. Like section 4 above, yet as the rips are partly protruding from the inner wall and partially recessed in the inner wall.
10. Like section 4 above, yet as all or part of the tubular segment is twisted and/or distorted and as a result of that an effect similar to the one achieved by the rips - a linear flow of the concrete and/or mortar and/or cement and/or grout and/or lime and/or cement water and/or cement grout is obtained generating a rotary motion of the tubular segment around its main axis.
1 1. Like section 8 and 9 above, yet as there is only one rip and/or one niche or as there are several rips and/or niches.
12. Like section 1 1 above, yet as the pitch of the rips and/or niches is uniform and/or non-uniform.
13. Like section 12 above, yet as the inward protrusion of the rips from the inner wall of the tubular segment and/or of the recesses located on the inner wall of the tubular segment are of uniform and/or varying protrusion and/or recession.
PCT/IL2000/000169 1999-03-21 2000-03-16 Instrument for concrete volume measurement WO2000057140A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL12907599A IL129075A0 (en) 1999-03-21 1999-03-21 Instrument for concrete volume measurement
IL129075 1999-03-21

Publications (1)

Publication Number Publication Date
WO2000057140A1 true WO2000057140A1 (en) 2000-09-28

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Country Status (2)

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WO (1) WO2000057140A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1859071A (en) * 1929-09-17 1932-05-17 Walter D Burger Grease metering device
US3318147A (en) * 1964-09-29 1967-05-09 Perkins Pipe Linings Inc Rate of flow indicator for mortar
US4649756A (en) * 1985-06-07 1987-03-17 Feller Murray F Flow sensors

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1859071A (en) * 1929-09-17 1932-05-17 Walter D Burger Grease metering device
US3318147A (en) * 1964-09-29 1967-05-09 Perkins Pipe Linings Inc Rate of flow indicator for mortar
US4649756A (en) * 1985-06-07 1987-03-17 Feller Murray F Flow sensors

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Publication number Publication date
IL129075A0 (en) 2000-02-17

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