CN103616315A - Lifting-pulling type rheometer and concrete pumping equipment type selection method - Google Patents
Lifting-pulling type rheometer and concrete pumping equipment type selection method Download PDFInfo
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- CN103616315A CN103616315A CN201310653519.5A CN201310653519A CN103616315A CN 103616315 A CN103616315 A CN 103616315A CN 201310653519 A CN201310653519 A CN 201310653519A CN 103616315 A CN103616315 A CN 103616315A
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Abstract
The invention discloses a lifting-pulling type rheometer and a concrete pumping equipment type selection method. The lifting-pulling type rheometer comprises a base, a drive mechanism, a pulling cable, a piston, a speed sensor, a tension sensor and a cylinder barrel, wherein the cylinder barrel is vertically arranged on the base, the piston is arranged in the cylinder barrel in a slideable manner, one end of the pulling cable is connected with the drive mechanism, the other end of the pulling cable is connected with the piston, the tension sensor is arranged on the pulling cable, and used for detecting a tension of the pulling cable, the drive mechanism drives the piston to upwards move at a constant speed through the pulling cable, and the speed sensor is used for obtaining a movement speed of the piston. Through the lifting-pulling type rheometer, a coefficient of viscosity of concrete can be conveniently obtained, so that the theoretical foundation can be provided for type selection of concrete pumping equipment. In addition, a proportion of the concrete can be regulated according to the coefficient of viscosity of the concrete, and further the performance of the concrete is optimized.
Description
Technical field
The present invention relates to fluid property parameter detecting technology, be specifically related to a kind of pull-type flow graph.In addition, the present invention also proposes a kind of concrete pumping equipment selection method.
Background technology
At present, concrete, as basic material, has been widely used in all kinds of engineering constructions, and so, concrete performance parameter is self-evident on the impact of construction quality.And, in work progress, for improving operating efficiency, reduction of erection time, conventionally can use pumping machine (such as concrete mixer, drag pump or boom etc.) concrete pump to be delivered to the precalculated position of construction site, and concrete performance parameter also has important impact to pumpdown, viscosity coefficient especially; The concrete that viscosity coefficient is appropriate, can reduce the energy consumption of pumpdown, improves rate of pumping, and reduces the loss of pumping machine.Therefore, along with social progress, people start by studying concrete viscosity coefficient, can calculate pump concrete to the needed pumping pressure of predetermined altitude on the one hand, be beneficial to the type selecting of pumping equipment, on the other hand, can find the concrete of the most applicable pumping, to promote time benefit and the economic benefit of engineering construction.
China is in the industry standard < < Concrete Pumping Construction technical regulation > > of nineteen ninety-five promulgation, what proposed pump concrete loses experimental formula along stroke pressure, wherein calculates the method significant discomfort of viscosity coefficient for the current high-grade concrete generally using.For studying the pumping technology of various high-grade concretes, need to study concrete rheological characteristics (is concrete distortion and flowing property under external force, rheological characteristics is mainly relevant with viscosity coefficient), in order to instruct the optimization improvement of concrete proportioning and the type selecting of equipment; Therefore, propose a kind of equipment that detects concrete viscosity coefficient and just become those skilled in the art's technical matters urgently to be resolved hurrily.
Summary of the invention
In view of this, the present invention proposes a kind of pull-type flow graph, utilizes this pull-type flow graph can be to obtain concrete viscosity coefficient to facilitate.In addition, the present invention also proposes a kind of concrete pumping equipment selection method.
On the one hand, the present invention proposes a kind of pull-type flow graph, comprise base, driving mechanism, drag-line, piston, speed pickup, pulling force sensor and cylinder barrel, described cylinder barrel is vertically arranged on base, and described piston is slidably arranged in cylinder barrel; One end of described drag-line is connected with driving mechanism, and the other end is connected with piston; Described pulling force sensor is arranged on drag-line, for detection of the pulling force of drag-line; Described driving mechanism passes through up uniform motion of drag-line driven plunger, and described speed pickup is for obtaining the movement velocity of piston.
Further, driving mechanism comprises rotary part and fixed pulley, and described rotary part is arranged on base, and described fixed pulley is arranged on the top of described cylinder barrel, and described guy cable rounds fixed pulley is connected with rotary part.
Further, be also provided with support on described base, described fixed pulley is arranged on described support, and the rope stretching of described fixed pulley point is positioned on the central axis of described cylinder barrel.
Further, described rotary part comprises rolling wheel and motor, or described rotary part comprises rolling wheel and oil motor, and described rolling wheel is fixedly installed on the output shaft of described motor or oil motor and is connected with described drag-line.
Further, described speed pickup is arranged on piston, or described speed pickup is arranged on described motor or oil motor.
Further, described driving mechanism comprises telescopic oil cylinder, and described drag-line is connected with the piston rod of telescopic oil cylinder.
Further, described telescopic oil cylinder is coaxially arranged on the top of cylinder barrel.
Further, described pull-type flow graph also comprises data processing unit, and described data processing unit receives the pulling force information of pulling force sensor and the velocity information of speed pickup, and obtains concrete viscosity coefficient according to described pulling force information and velocity information.
Further, the position near described base on described cylinder barrel wall is provided with air hole, and described air hole is communicated with inside and outside cylinder barrel.
The pull-type flow graph that the present invention proposes comprises base, driving mechanism, drag-line, piston, speed pickup, pulling force sensor and cylinder barrel, and described cylinder barrel is vertically arranged on base, and described piston is slidably arranged in cylinder barrel; Described pulling force sensor is arranged on drag-line, for detection of the pulling force of drag-line; One end of described drag-line is connected with driving mechanism, and the other end is connected with piston; Described driving mechanism passes through up uniform motion of drag-line driven plunger, and described speed pickup is for obtaining the movement velocity of piston.The principle of work of this pull-type flow graph is: when initial, piston is positioned at the bottom of cylinder barrel, a certain amount of concrete is put into cylinder barrel and be placed in piston top, driving mechanism pulls up uniform motion of piston by drag-line, in uniform motion process, pulling force sensor detects the pulling force that drag-line is subject to, and speed pickup directly or indirectly obtains the movement velocity of piston; According to equilibrium of forces principle, the pulling force that the friction resistance while up moving by the gravity of piston, concrete gravity, piston and pulling force sensor detect, can obtain the total sticky resistance that concrete produces in inner wall of cylinder; In conjunction with the contact area of concrete and inner wall of cylinder and total sticky resistance, can obtain the sticky resistance (being called for short the sticky resistance of unit) that concrete produces in unit area inner wall of cylinder again; Adopt after several different motion speed tests, can obtain the sticky resistance of unit under friction speed, can obtain accordingly the two-dimentional relation curve between the sticky resistance of concrete unit and movement velocity, then this two-dimentional relation curve be carried out can obtaining viscosity coefficient after quadratic fit.Certainly, after obtaining concrete viscosity coefficient, can obtain concrete losing along stroke pressure under predetermined operating mode according to existing experimental formula, then, according to selecting suitable pumping equipment and pumping technology along stroke pressure loss.In addition, can also adjust concrete proportioning according to concrete viscosity coefficient, and then optimize concrete performance.
On the other hand, the invention allows for a kind of concrete pumping equipment selection method, comprise the following steps:
Adopt the indirect or direct concrete viscosity coefficient of above-mentioned pull-type flow graph;
According to described viscosity coefficient acquisition is concrete, along stroke pressure, lose;
According to the described model of selecting pumping equipment along stroke pressure loss.
When pump concrete, by above-mentioned pull-type flow graph, indirectly or directly obtain concrete viscosity coefficient, and then obtain concrete along stroke pressure loss, when type selecting, can be according to determine the parameters such as the power of concrete pumping equipment and extreme pressure along the size of stroke pressure loss; Therefore, by the method, select the model of concrete pumping equipment can avoid occurring concrete pumping equipment and the unmatched situation of job requirements.
Accompanying drawing explanation
The accompanying drawing that forms a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic perspective view of the pull-type flow graph of specific embodiment of the invention proposition;
Cut-open view when Fig. 2 is the concrete of pull-type rheometer test shown in Fig. 1.
Description of reference numerals:
1-base, 2-cylinder barrel, 3-piston, 4-drag-line, 5-pulling force sensor
6-support, 7-fixed pulley, 8-motor, 9-rolling wheel, 10-flange
11-concrete
Embodiment
It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the present invention can combine mutually.Below in conjunction with accompanying drawing 1 and 2 pairs of specific embodiments of the invention of accompanying drawing, be elaborated.
As shown in Figure 1, the pull-type flow graph that the specific embodiment of the invention proposes comprises base 1, driving mechanism, drag-line 4, piston 3, speed pickup, pulling force sensor 5 and cylinder barrel 2, cylinder barrel 2 is vertically arranged on base 1 by flange 10 and bolt, and piston 3 is slidably arranged in cylinder barrel 2; One end of drag-line 4 is connected with driving mechanism, and the other end is connected with piston 3; Pulling force sensor 5 is arranged on drag-line 4, for detection of the pulling force of drag-line 4; Driving mechanism passes through up uniform motion of drag-line 4 driven plunger 3, and speed pickup is for obtaining the movement velocity of piston 3; In the present embodiment, driving mechanism specifically comprises motor 8, rolling wheel 9 and fixed pulley 7, motor 8 is located on base 1, rolling wheel 9 is arranged on the output shaft of motor 8, one end of drag-line 4 is fixed on rolling wheel 9, is provided with support 6 on base 1, and fixed pulley 7 is arranged on support 6, and the rope stretching of fixed pulley 7 point is positioned on the central axis of cylinder barrel 2, drag-line 4 is walked around fixed pulley 7 and is connected with piston 3.
The principle of work of this pull-type flow graph is: when initial, piston 3 is positioned at the bottom of cylinder barrel 2, as shown in Figure 2, a certain amount of concrete 11 is put into cylinder barrel 2 and is placed in piston 3 tops, then, motor 8 drives rolling wheel 9 uniform rotation, drag-line 4 is involved in by rolling wheel 9, under the pulling force effect of rolling wheel 9, drag-line 4 drives piston 3 up to move, and then drive concrete 11 on piston 3 with a certain speed uniform motion that makes progress, in uniform motion process, pulling force sensor 5 detects the pulling force that drag-line 4 is subject to, and speed pickup directly or indirectly obtains the movement velocity of piston 3; According to equilibrium of forces principle, by the gravity of piston 3, the pulling force that friction resistance while up moving of the gravity of concrete 11, piston 3 and pulling force sensor 5 detect can obtain the total sticky resistance that concrete 11 produces on cylinder barrel 2 inwalls; In conjunction with concrete 11 and the contact area of cylinder barrel 2 inwalls and total sticky resistance, can obtain the sticky resistance (being called for short the sticky resistance of unit) that concrete 11 produces on unit area cylinder barrel 2 inwalls again; Adopt after several different motion speed tests, can obtain the sticky resistance of unit under friction speed, can obtain accordingly the sticky resistance of unit of concrete 11 and the two-dimentional relation curve between movement velocity, then this two-dimentional relation curve be carried out can obtaining viscosity coefficient after quadratic fit.It should be noted that, the friction resistance that the gravity of the gravity of piston 3, concrete 11 and piston 3 up move can record or calculate according to existing formula according to this pull-type flow graph self parameter before the viscosity coefficient of test concrete 11.In addition, above-mentioned speed pickup can be arranged on piston 3, for directly testing the linear velocity transducer of piston 3 speed (being equivalent to concrete 11 movement velocitys), can be also the angular-rate sensor that detects motor 8 rotating speeds; Different from the former, adopt angular-rate sensor to detect after motor 8 angular velocity, also need just can calculate piston 3 movement velocity up in conjunction with the radius of rolling wheel 9.
Certainly, after obtaining the viscosity coefficient of concrete 11, can obtain concrete 11 according to existing experimental formula (is understandable that under predetermined operating mode, the job parameter that the predetermined operating mode here relates in the time of should referring to concrete 11 pumpdown, such as pipe diameter, delivery head, horizontal range etc.) along stroke pressure, lose, then, according to selecting suitable pumping equipment and pumping technology along stroke pressure loss.In addition, can also adjust according to the viscosity coefficient of concrete 11 proportioning of concrete 11, and then optimize the performance of concrete 11.
In embodiment further, detect for convenience the processing of data, this pull-type flow graph is also provided with data processing unit, data processing unit receives the pulling force information of pulling force sensor 5 and the velocity information of speed pickup, and according to the pulling force information of test of many times and velocity information, automatically calculates the viscosity coefficient of concrete 11.
In embodiment further, the position near base 1 on cylinder barrel 2 walls is provided with air hole, and air hole is communicated with inside and outside cylinder barrel 2; By starting air hole at cylinder barrel 2 near the position of base 1, when piston 3 moves upward, air, in air hole enters into cylinder barrel 2, and then guarantees that the air pressure of piston 3 above and belows keeps balance, thereby preventing that air pressure is unbalanced has a negative impact to test result; In addition, in cylinder barrel 2 bottoms, offer the normal effect that air hole does not affect cylinder barrel 2 yet.
Hold intelligiblely, in other embodiments, can adopt oil motor to replace above-mentioned motor 8; Certainly, driving mechanism that also can other structure, such as telescopic oil cylinder, particularly, telescopic oil cylinder is coaxially arranged on the top of cylinder barrel 2, and drag-line 4 is connected with piston 3 bars of telescopic oil cylinder.
In addition, the concrete pumping equipment selection method that the specific embodiment of the invention proposes, comprises the following steps:
Adopt the indirect or direct concrete viscosity coefficient of above-mentioned pull-type flow graph;
According to viscosity coefficient acquisition is concrete, along stroke pressure, lose;
According to select the model of pumping equipment along stroke pressure loss.
When pump concrete, by above-mentioned pull-type flow graph, indirectly or directly obtain concrete viscosity coefficient, and then obtain concrete along stroke pressure loss, when type selecting, can be according to determine the parameters such as the power of concrete pumping equipment and extreme pressure along the size of stroke pressure loss; Therefore, by the method, select the model of concrete pumping equipment can avoid occurring concrete pumping equipment and the unmatched situation of job requirements.It should be noted that, the model of said concrete pumping equipment relates generally to the parameters such as pumping pressure, discharge capacity, pumping frequency here.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a pull-type flow graph, it is characterized in that, comprise base (1), driving mechanism, drag-line (4), piston (3), speed pickup, pulling force sensor (5) and cylinder barrel (2), it is upper that described cylinder barrel (2) is vertically arranged on base (1), and described piston (3) is slidably arranged in cylinder barrel (2); One end of described drag-line (4) is connected with driving mechanism, and the other end is connected with piston (3); It is upper that described pulling force sensor (5) is arranged on drag-line (4), for detection of the pulling force of drag-line (4); Described driving mechanism passes through up uniform motion of drag-line (4) driven plunger (3), and described speed pickup is used for obtaining the movement velocity of piston (3).
2. pull-type flow graph according to claim 1, it is characterized in that, driving mechanism comprises rotary part and fixed pulley (7), described rotary part is arranged on base (1), described fixed pulley (7) is arranged on the top of described cylinder barrel (2), and described drag-line (4) is walked around fixed pulley (7) and is connected with rotary part.
3. pull-type flow graph according to claim 2, it is characterized in that, on described base (1), be also provided with support (6), it is upper that described fixed pulley (7) is arranged on described support (6), and the rope stretching point of described fixed pulley (7) is positioned on the central axis of described cylinder barrel (2).
4. pull-type flow graph according to claim 2, it is characterized in that, described rotary part comprises rolling wheel (9) and motor (8), or, described rotary part comprises rolling wheel (9) and oil motor, and described rolling wheel (9) is fixedly installed on the output shaft of described motor (8) or oil motor and is connected with described drag-line (4).
5. pull-type flow graph according to claim 4, is characterized in that, it is upper that described speed pickup is arranged at piston (3), or described speed pickup is arranged on described motor (8) or oil motor.
6. pull-type flow graph according to claim 1, is characterized in that, described driving mechanism comprises telescopic oil cylinder, and described drag-line (4) is connected with the piston rod of telescopic oil cylinder.
7. pull-type flow graph according to claim 6, is characterized in that, described telescopic oil cylinder is coaxially arranged on the top of cylinder barrel (2).
8. according to the pull-type flow graph described in claim 1 to 7 any one, it is characterized in that, also comprise data processing unit, described data processing unit receives the pulling force information of pulling force sensor (5) and the velocity information of speed pickup, and obtains concrete viscosity coefficient according to described pulling force information and velocity information.
9. according to the pull-type flow graph described in claim 1 to 7 any one, it is characterized in that, the position near described base (1) on described cylinder barrel (2) wall is provided with air hole, and described air hole is communicated with inside and outside cylinder barrel (2).
10. a concrete pumping equipment selection method, is characterized in that, comprises the following steps:
Pull-type flow graph described in employing claim 1 to 9 any one obtains concrete viscosity coefficient indirectly or directly;
According to described viscosity coefficient acquisition is concrete, along stroke pressure, lose;
According to the described model of selecting pumping equipment along stroke pressure loss.
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Cited By (7)
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| CN104316438A (en) * | 2014-11-03 | 2015-01-28 | 北京新奥混凝土集团有限公司 | Traction-type concrete pumping performance tester and test method thereof |
| CN104895797A (en) * | 2015-04-20 | 2015-09-09 | 扬州大学 | Quantification comparison and selection method of types of large low-head pump devices |
| CN104989653A (en) * | 2015-05-25 | 2015-10-21 | 扬州大学 | Water pump selection method for low-lift pump unit based on impeller nominal average flow speed |
| CN105834077A (en) * | 2016-06-01 | 2016-08-10 | 中国建筑第八工程局有限公司 | Joint gluing device |
| CN107505234A (en) * | 2017-07-10 | 2017-12-22 | 中国建材检验认证集团贵州有限公司 | A kind of concrete pumping system safety testing device and method of testing |
| CN108709981A (en) * | 2018-09-17 | 2018-10-26 | 上海建工集团股份有限公司 | A kind of concrete ultra-high pumping simulating, verifying device and method |
| 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 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104316438A (en) * | 2014-11-03 | 2015-01-28 | 北京新奥混凝土集团有限公司 | Traction-type concrete pumping performance tester and test method thereof |
| CN104316438B (en) * | 2014-11-03 | 2016-06-15 | 北京新奥混凝土集团有限公司 | A kind of towed concrete pumping performance test instrument and test method thereof |
| CN104895797A (en) * | 2015-04-20 | 2015-09-09 | 扬州大学 | Quantification comparison and selection method of types of large low-head pump devices |
| CN104895797B (en) * | 2015-04-20 | 2016-04-27 | 扬州大学 | The quantification methods of comparison and selection of large-scale low-lift pump device type |
| CN104989653A (en) * | 2015-05-25 | 2015-10-21 | 扬州大学 | Water pump selection method for low-lift pump unit based on impeller nominal average flow speed |
| CN105834077A (en) * | 2016-06-01 | 2016-08-10 | 中国建筑第八工程局有限公司 | Joint gluing device |
| CN107505234A (en) * | 2017-07-10 | 2017-12-22 | 中国建材检验认证集团贵州有限公司 | A kind of concrete pumping system safety testing device and method of testing |
| CN108709981A (en) * | 2018-09-17 | 2018-10-26 | 上海建工集团股份有限公司 | A kind of concrete ultra-high pumping simulating, verifying device and method |
| 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 |
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