CN212622604U - Homogeneity measuring device for fresh concrete - Google Patents
Homogeneity measuring device for fresh concrete Download PDFInfo
- Publication number
- CN212622604U CN212622604U CN202021130597.9U CN202021130597U CN212622604U CN 212622604 U CN212622604 U CN 212622604U CN 202021130597 U CN202021130597 U CN 202021130597U CN 212622604 U CN212622604 U CN 212622604U
- Authority
- CN
- China
- Prior art keywords
- measuring
- fixed
- fresh concrete
- homogeneity
- barrel
- 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.)
- Active
Links
Images
Landscapes
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The utility model provides a homogeneity measuring device for fresh concrete. Constitute by capacity bucket, measuring bucket, pivot, bearing, A-frame, stay cord, tensiometer, drag hook, fixed bolster and experiment flatbed, the measuring bucket can be arranged in to the capacity bucket, the pivot is fixed in measuring bucket upper edge department, the bearing is fixed in the annular steel ring of A-frame, the pivot is embedded in the bearing hole, the A-frame symmetry is fixed in on the experiment flatbed, stay cord one end is fixed in measuring bucket bottom center department, and the other end links to each other with the drag hook, the tensiometer is connected on the stay cord, the fixed bolster is fixed in on the experiment flatbed. The utility model discloses utilize the balanced principle of static force to survey the focus position of fresh concrete in the capacity bucket to this quantitative homogeneity of judging fresh concrete has overcome the drawback that fresh concrete homogeneity relies on experience to judge, has accuracy and practicality.
Description
Technical Field
The utility model relates to a concrete mixing plant fresh concrete or concrete homogeneity for concrete construction unit detect, concretely relates to fresh concrete homogeneity measuring device.
Background
The concrete homogeneity refers to the characteristic that coarse aggregate, fine aggregate, slurry and other phases in the concrete are uniformly distributed in the space, and is a very important factor influencing the quality of the concrete. The good homogeneity of each item is the premise that the concrete realizes good working performance and mechanical property of the concrete. The thick and thin aggregate and slurry of the concrete in an ideal state are uniformly distributed in the space, but in practice, the concrete (particularly the pumping concrete) has the condition that the aggregate sinks to different degrees and the slurry floats, and the more obvious the upper layer and the lower layer of the concrete are, the worse the homogeneity is. At present, no effective quantitative detection means exists for the homogeneity of fresh concrete, and the qualitative judgment is generally carried out by experience, has obvious limitation and causes serious hidden danger of the concrete quality.
Disclosure of Invention
An object of the utility model is to provide a homogeneity measuring device for fresh concrete for detect fresh concrete homogeneity, realize judging the quantification of fresh concrete homogeneity, avoided the hysteresis risk of judging homogeneity again after the concrete sclerosis.
The utility model provides a homogeneity measuring device for fresh concrete, constitute including capacity bucket, measuring bucket, pivot, bearing, A-frame, stay cord, tensiometer, drag hook, fixed bolster and experiment flatbed, the measuring bucket can be arranged in to the capacity bucket, on two A-frame symmetries were fixed in experiment flatbed, in two bearings were fixed in corresponding A-frame's annular steel ring respectively, two pivot one end were fixed in measuring bucket both sides top edge department respectively, and the other end inlays respectively in corresponding bearing downthehole, and stay cord one end is fixed in measuring bucket bottom center department, and the other end links to each other with the drag hook, the tensiometer is connected on the stay cord, the fixed bolster is fixed in on the experiment flatbed.
The utility model discloses in, the capacity bucket is the plastics material, heavily is 0.5kg ~1.0kg, and the height to diameter ratio is 3/1~2/1, and capacity bucket wall thickness is 3mm ~5mm, and capacity bucket top is equipped with sealed lid, and the bung hole edge of capacity bucket is equipped with a pair of handle.
The utility model discloses in, the measurement bucket is light aluminum alloy material, and is heavy for 1.0~2.0kg, and the height to diameter ratio is 3/1~2/1, and the measurement bucket wall thickness is 3mm ~5 mm.
The utility model discloses in, the pivot is steel, and the diameter is 30mm ~40mm, and two pivots are located same space straight line.
The utility model discloses in, the A-frame is the steel material, wholly is three horn shapes, and on the bottom mounting was tested the flatbed, the upper end was equipped with annular bearing, is equipped with the annular steel ring on the annular bearing. The 2 triangular supports are symmetrically distributed and support the rotating shaft and the measuring barrel together.
The utility model discloses in, the stay cord is commercial wire rope, and the diameter is 1mm ~1.5mm, and length is 300~400mm, the bearing adopts commercial deep groove ball bearing, and the internal diameter is 30mm ~40 mm.
The utility model discloses in, the tensiometer is the commercial digital display tensiometer, sets up on the stay cord, and the pulling force value of measurable stay cord, the tensiometer range is 0~100N, and the division value is 0.25~ 0.5N.
In the utility model, the draw hook is a stainless steel draw hook.
In the utility model, the fixed support is made of iron material and is formed by welding 2 vertical rods and 1 horizontal rod, the axial direction of the horizontal rod is parallel to the axial direction of the rotating shaft, the horizontal rod is provided with a groove, and when the drag hook is hooked on the horizontal rod, the groove can limit the transverse displacement of the drag hook; the height of the vertical rod is 120 mm-160 mm, and the specific height setting principle is as follows: when the draw hook is hooked on the cross rod, the center point of the bottom of the measuring barrel is as high as the cross rod, and the fixed support is welded and fixed on the experiment flat car.
The utility model discloses in, the experiment is dull and stereotyped to be the iron material flatbed, and the bottom is provided with 4 wheels, convenient removal.
The utility model provides a measurement method of freshly mixed concrete homogeneity measuring device, concrete step is as follows:
(1) filling fresh concrete into a volumetric barrel, tamping or vibrating tightly, ensuring that the surface of the concrete is flush with the upper edge of the container, covering a barrel cover, weighing the mass of the concrete, and recording as Mc;
(2) lifting the capacity barrel filled with concrete and slowly loading the capacity barrel into the measuring barrel;
(3) pulling the draw hook to hook the draw hook at the groove of the fixed support, wherein the center point of the bottom of the measuring barrel and the cross rod are in the same horizontal plane;
(4) reading the tension value displayed by the tension meter and recording the tension value as F;
(5) the gravity center position of the concrete is calculated by utilizing the moment balance principle under the static balance lower system, and the calculation formula is expressed as follows:
wherein: x represents the distance from the gravity center point position of the concrete in the measuring barrel to the upper surface of the concrete, F is a tension value displayed by a tension meter, and the unit is cattle (N); theta represents the rotation angle of the rotating shaft of the measuring barrel when the draw hook is hooked on the cross rod of the fixed support, and the unit is Degree (DEG), g is a gravity unit, the value is equal to 9.8, and the unit is N/kg; mc represents the mass of the concrete in kg; m0Represents the total mass of the volumetric barrel and the measuring barrel 2 barrels in unit kg; l represents the height of the volume barrel in mm; in the formula, F is measured by a tension meter, Mc is obtained by weighing, g is a constant, theta and M0The 3 parameters, L, are all characteristic values of the device, determined and known, from which the value of x is calculated.
The beneficial effects of the utility model reside in that: the utility model discloses in packing into the staving that has the axis of rotation newly-mixed concrete, make the staving rotate certain angle along the top edge through the power of applying a parallel direction at the bottom center, recycle the moment balance principle, establish the moment balance equation of pivot department, and then derive the equation of concrete focus position to calculate concrete focus's position. The utility model discloses utilize moment balance principle direct calculation to obtain the focus position of fresh concrete, quantized fresh concrete's homogeneity to easy operation, suitable concrete mixing plant or concrete placement field usage again have accuracy and practicality.
Drawings
Fig. 1 is the utility model discloses a homogeneity measuring device schematic diagram for fresh concrete.
FIG. 2 is a schematic view of the connection point of the pull rope and the measuring barrel.
Fig. 3 is a schematic view of the manner of fastening the triangular bracket and the bearing.
Reference numbers in the figures: the device comprises a capacity barrel 1, a sealing cover 11, a handle 12, a measuring barrel 2, a rotating shaft 3, a bearing 4, a triangular support 5, a tension meter 6, a pull rope 7, a drag hook 8, a fixing support 9 and an experiment flat car 10.
Detailed Description
The present invention will be further explained with reference to the drawings and examples. It is to be understood that the description herein is only for purposes of illustrating and explaining embodiments of the present invention and is not intended to limit the embodiments of the present invention.
Example 1: referring to fig. 1, a homogeneity measuring device for fresh concrete is composed of a capacity barrel 1, a measuring barrel 2, a rotating shaft 3, a bearing 4, a triangular bracket 5, a pull rope 6, a tension meter 7, a draw hook 8, a fixed bracket 9 and an experimental flat car 10. The measuring barrel 1 can be arranged in the measuring barrel 2, the rotating shaft 3 is fixed at the upper edge of the measuring barrel 2, the bearing 4 is fixed in an annular steel ring of the triangular support 5, the rotating shaft 3 is embedded in an inner hole of the bearing 4, the triangular support 5 is symmetrically fixed on the test flat car 10, one end of the pull rope 7 is fixed at the center of the bottom of the measuring barrel 2, the other end of the pull rope is connected with the pull hook 8, the tension meter 6 is connected onto the pull rope 7, and the fixing support 9 is fixed on the test flat car 10.
The volume barrel 1 is made of plastic materials, is used as a fresh concrete container, weighs 0.5 kg-1.0 kg, has a height-diameter ratio of 2/1-3/1, has a barrel wall thickness of 3 mm-5 mm, is provided with a sealing cover 11, and is provided with a pair of handles 12 at the edge of a barrel opening.
The measuring barrel 2 is made of light aluminum alloy, the weight is 1.0-2.0 kg, the height-diameter ratio is 2/1-3/1, and the barrel wall thickness is 3-5 mm.
The rotating shafts 3 are made of steel materials, the diameter of each rotating shaft is 30 mm-40 mm, one end of each rotating shaft is welded on the wall of the measuring barrel 2, one end of each rotating shaft is embedded in the corresponding bearing 4, and the two rotating shafts 3 are located on the same space straight line to jointly form the rotating shafts 3.
The bearing 4 is a commercial deep groove ball bearing, the inner diameter is 30 mm-40 mm, the bearing is nested on the rotating shaft 3, and the outer diameter is fixed on the triangular support 5.
The triangular support 5 is made of steel and is integrally triangular, the bottom end of the triangular support is fixed on the experiment flat car 10, an annular bearing support is arranged at the upper end of the triangular support, and the bearing 4 is fixed on the bearing support. The 2 triangular supports 5 are symmetrically distributed and support the rotating shaft 3 and the measuring barrel 2 together.
The pull rope 7 is a commercially available steel wire rope, the diameter of the pull rope is 1 mm-1.5 mm, the length of the pull rope is 300-400 mm, one end of the pull rope is connected with the central point of the outer bottom surface of the measuring barrel 2 in a welding mode, and the other end of the pull rope is connected with the drag hook 8.
The tension meter 6 is a commercial digital display tension meter, is arranged on the pull rope 7, and can measure the tension value, the measuring range and the division value of the pull rope 7, wherein the measuring range is 0-100N, and the division value is 0.25-0.5N. The draw hook 8 is made of stainless steel and is connected with the pull rope 7.
The fixed support 9 is made of iron materials and formed by welding 2 vertical rods and 1 cross rod, the axial direction of the cross rod is parallel to the axial direction of the rotating shaft 3, a groove is formed in the cross rod, and when the drag hook 8 is hooked on the cross rod, the groove can limit the transverse displacement of the drag hook 8; the height of the vertical rod is 120 mm-160 mm, and the specific height setting principle is as follows: when the draw hook 8 is arranged on the cross rod, the center point of the bottom of the measuring barrel 2 is as high as the cross rod, and the fixed support 9 is welded and fixed on the experiment flat car 10. Experiment flatbed 10 is the iron material flatbed, is provided with 4 wheels, conveniently removes.
Referring to fig. 1-2, a method for measuring the homogeneity of fresh concrete comprises:
(1) filling fresh concrete into a volumetric barrel, tamping or vibrating tightly, ensuring that the surface of the concrete is flush with the upper edge of the container, covering a barrel cover, weighing the mass of the concrete, and recording as Mc;
(2) lifting the capacity barrel filled with concrete and slowly loading the capacity barrel into the measuring barrel;
(3) and pulling the draw hook to hook the draw hook at the groove of the fixed support, wherein the circle center point of the bottom of the measuring barrel and the cross rod are in the same horizontal plane.
(4) The tensile value indicated by the tension meter was read and recorded as F.
(5) The gravity center position of the concrete is calculated by utilizing the moment balance principle under the static balance lower system, and the calculation formula is expressed as follows:
wherein: x represents the distance from the gravity center point position of the concrete in the measuring barrel to the upper surface of the concrete, F is a tension value displayed by a tension meter, and the unit is cattle (N); theta represents the rotation angle of the rotating shaft of the measuring barrel when the draw hook is hooked on the cross rod of the fixed support, and the unit is Degree (DEG), g is a gravity unit, the value is equal to 9.8, and the unit is N/kg; mc represents the mass of the concrete in kg; m0Represents the total mass of the volumetric barrel and the measuring barrel 2 barrels in unit kg; l represents the height of the volume bucket in m.
In one embodiment, the height of the capacity barrel is 300mm, the sum of the mass of the capacity barrel and the mass of the measuring barrel is 2.0kg, when the draw hook is hooked at the groove of the fixed support, the rotation angle of the measuring barrel is 30 degrees, and the concrete gravity center position testing method comprises the following steps:
(1) filling fresh concrete into a volumetric barrel, tamping or vibrating tightly, ensuring that the surface of the concrete is flush with the upper edge of the container, covering a barrel cover, and weighing the fresh concrete with the mass of 22.0 kg;
(2) lifting the capacity barrel filled with concrete and slowly loading the capacity barrel into the measuring barrel;
(3) and pulling the draw hook to hook the draw hook at the groove of the fixed support, wherein the circle center point of the bottom of the measuring barrel and the cross rod are in the same horizontal plane.
(4) The tensile value indicated by the tensile gauge was read and recorded as 75.4N.
(5) The gravity center position of the concrete is calculated by utilizing the moment balance principle under the static balance lower system, and the calculation formula is expressed as follows:
wherein: x represents the distance from the gravity center point position of the concrete in the capacity barrel to the upper surface of the concrete, and F is a tension value displayed by a tension meter and is 75.4N; theta represents the rotation angle of the rotating shaft of the measuring barrel when the draw hook is hooked on the cross rod of the fixed support, and is 30 degrees, g is a gravity unit, and the value is equal to 9.8N/kg; mc represents the mass of the concrete and is 22.0 kg; m0The total mass of 2 buckets representing the volumetric bucket and the measuring bucket is 2.0 kg; l represents the height of the volume barrel and is 300 mm. The data are put into the formula x =168mm, namely the distance between the gravity center position of the fresh concrete and the upper surface is 168mm, the gravity center of the concrete in an ideal state is shifted downwards by 18mm, and therefore the homogeneity of the fresh concrete can be quantified as: the center of gravity is shifted down 18 mm.
The above description is only a preferred embodiment of the present invention, and therefore the scope of the present invention should not be limited by this description, and all equivalent changes made within the scope and the specification of the present invention should be considered within the scope of the present invention.
Claims (10)
1. The utility model provides a homogeneity measuring device for fresh concrete, comprises capacity bucket, measuring bucket, pivot, bearing, A-frame, stay cord, tensiometer, drag hook, fixed bolster and experiment flatbed, its characterized in that: the capacity bucket can be arranged in the measuring bucket, two A-frame symmetries are fixed in on the experimental flatbed, and in two bearings were fixed in the annular steel ring of corresponding A-frame respectively, two pivot one end were fixed in measuring bucket both sides top edge respectively, and the other end inlays respectively in corresponding bearing inner hole, and stay cord one end was fixed in measuring bucket bottom center department, and the other end links to each other with the drag hook, the tensiometer is connected on the stay cord, the fixed bolster is fixed in on the experimental flatbed.
2. The apparatus for measuring homogeneity for fresh concrete according to claim 1, characterized in that: the volume barrel is made of plastic materials, the weight is 0.5 kg-1.0 kg, the height-diameter ratio is 3/1-2/1, the wall thickness of the volume barrel is 3 mm-5 mm, a sealing cover is arranged at the top of the volume barrel, and a pair of handles are arranged at the edge of a barrel opening of the volume barrel.
3. The apparatus for measuring homogeneity for fresh concrete according to claim 1, characterized in that: the measuring barrel is made of light aluminum alloy, the weight is 1.0-2.0 kg, the height-diameter ratio is 3/1-2/1, and the wall thickness of the measuring barrel is 3 mm-5 mm.
4. The apparatus for measuring homogeneity for fresh concrete according to claim 1, characterized in that: the rotating shafts are made of steel materials, the diameters of the rotating shafts are 30 mm-40 mm, and the two rotating shafts are located on the same space straight line.
5. The apparatus for measuring homogeneity for fresh concrete according to claim 1, characterized in that: the triangular support is made of steel materials and is integrally triangular, the bottom end of the triangular support is fixed on the experiment flat car, an annular bearing support is arranged at the upper end of the triangular support, and an annular steel ring is arranged on the annular bearing support.
6. The apparatus for measuring homogeneity for fresh concrete according to claim 1, characterized in that: the pull rope is a commercially available steel wire rope, the diameter of the pull rope is 1 mm-1.5 mm, the length of the pull rope is 300-400 mm, the bearing is a commercially available deep groove ball bearing, and the inner diameter of the bearing is 30 mm-40 mm.
7. The apparatus for measuring homogeneity for fresh concrete according to claim 1, characterized in that: the tension meter is a commercially available digital display tension meter and is arranged on the pull rope, the tension value of the pull rope can be measured, the measuring range of the tension meter is 0-100N, and the division value is 0.25-0.5N.
8. The apparatus for measuring homogeneity for fresh concrete according to claim 1, characterized in that: the draw hook is a stainless steel draw hook.
9. The apparatus for measuring homogeneity for fresh concrete according to claim 1, characterized in that: the fixed support is made of iron materials and formed by welding 2 vertical rods and 1 cross rod, the axial direction of the cross rod is parallel to the axial direction of the rotating shaft, a groove is formed in the cross rod, and when the drag hook is hooked on the cross rod, the groove can limit the transverse displacement of the drag hook; the height of the vertical rod is 120 mm-160 mm, and the specific height setting principle is as follows: when the draw hook is hooked on the cross rod, the center point of the bottom of the measuring barrel is as high as the cross rod.
10. The apparatus for measuring homogeneity for fresh concrete according to claim 1, characterized in that: the experiment is dull and stereotyped for the iron material flatbed, and the bottom is provided with 4 wheels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021130597.9U CN212622604U (en) | 2020-06-18 | 2020-06-18 | Homogeneity measuring device for fresh concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021130597.9U CN212622604U (en) | 2020-06-18 | 2020-06-18 | Homogeneity measuring device for fresh concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212622604U true CN212622604U (en) | 2021-02-26 |
Family
ID=74717936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021130597.9U Active CN212622604U (en) | 2020-06-18 | 2020-06-18 | Homogeneity measuring device for fresh concrete |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212622604U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114199723A (en) * | 2021-12-21 | 2022-03-18 | 哈尔滨工业大学 | Rheological property testing device under vibration action of fresh concrete and using method thereof |
-
2020
- 2020-06-18 CN CN202021130597.9U patent/CN212622604U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114199723A (en) * | 2021-12-21 | 2022-03-18 | 哈尔滨工业大学 | Rheological property testing device under vibration action of fresh concrete and using method thereof |
| CN114199723B (en) * | 2021-12-21 | 2023-11-17 | 哈尔滨工业大学 | Rheological property testing device under vibration action of fresh concrete and application method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2943321B1 (en) | Concrete mixture measurement sensor and method | |
| CN212622604U (en) | Homogeneity measuring device for fresh concrete | |
| CN202092926U (en) | Accessory device using electronic scale to measure material density and apparatus including same | |
| CN205103124U (en) | Ground paste rheological behavior tester is filled to thick aggregate high concentration for coal mine | |
| WO2021253891A1 (en) | Method, device and system for detecting slump, and stirring-type engineering machine | |
| CN106522288A (en) | Control device for level of underwater concrete cast-in-place pile and use method thereof | |
| WO2011070331A1 (en) | Methods and systems for determining process variables using location of center of gravity | |
| CN110031021A (en) | A kind of hydrostatic level on-line calibration system and its calibration method | |
| CN101293560A (en) | Floating body carrier platform | |
| CN107675734B (en) | A kind of underwater directional vehicle construction dynamic monitoring method | |
| CN101403675B (en) | Novel mixed concrete viscosity measuring instrument | |
| CN107247156A (en) | A kind of flow rate measuring device and implementation based on pressure sensitive | |
| CN105880497A (en) | Method and device for measuring electromagnetic torque of electromagnetic stirrer of continuous casting crystallizer | |
| CN108896003A (en) | A kind of material table area measuring method | |
| CN210917492U (en) | Multidirectional-loading expansive soil pile foundation experimental device | |
| CN206352316U (en) | A kind of control device of underwater concrete filling pile absolute altitude | |
| CN110376094A (en) | A kind of bundled scrap specific weight measurer and measurement method | |
| CN205763720U (en) | A kind of measurement apparatus of continuous cast mold magnetic stirrer electromagnetic torque | |
| CN214952075U (en) | Detachable lower scale type bed load sand conveying rate measuring device | |
| CN109668603A (en) | A kind of battery core volume measurement device and method | |
| CN201298007Y (en) | Densimeter | |
| CN211504138U (en) | Intelligent response laser reinforced concrete structure swing optical detector | |
| CN212363342U (en) | Novel large container | |
| CN111576505A (en) | Device and method for testing pile top position of concrete cast-in-place pile | |
| CN204944624U (en) | Oil-water interface position measuring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |