CN111877766A - Device and method for digitally regulating rheological characteristics of pumped concrete - Google Patents
Device and method for digitally regulating rheological characteristics of pumped concrete Download PDFInfo
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- CN111877766A CN111877766A CN202010764700.3A CN202010764700A CN111877766A CN 111877766 A CN111877766 A CN 111877766A CN 202010764700 A CN202010764700 A CN 202010764700A CN 111877766 A CN111877766 A CN 111877766A
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- concrete
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- pump pipe
- pumped concrete
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/04—Devices for both conveying and distributing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention belongs to the technical field of building materials, and particularly relates to a device and a method for digitally regulating and controlling rheological properties of pumped concrete, aiming at improving the rheological properties of the pumped concrete. The device comprises an ultrasonic generator, an ultrasonic transducer, a self-climbing seat and a central control platform; the self-climbing seat is provided with a pair of clamping seats clamped by bolts, the roller is tightly held on the concrete pump pipe and driven by the motor to roll and drive the self-climbing seat to roll along the concrete pump pipe; an ultrasonic transducer is arranged on the outer side of the clamping seat. According to the method, the regulating devices are arranged on the concrete pump pipe at intervals, under the control of the central control platform, the ultrasonic transducer converts ultrasonic oscillation generated by the ultrasonic generator into mechanical vibration, the mechanical vibration is transmitted to pumped concrete in the concrete pump pipe through the concrete pump pipe, the pumped concrete generates mechanical vibration, and meanwhile, tiny air bubbles are generated in the pumped concrete to synergistically improve the rheological property of the pumped concrete.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a device and a method for digitally regulating rheological characteristics of pumped concrete.
Background
With the continuous rise of the construction of high and large structural buildings and structures at home and abroad, concrete pumping construction is widely popularized. Along with this, a series of problems such as concrete segregation, bleeding, slump loss, too high pumping resistance, pump blockage, pipe blockage and the like often occur in the pumping process of a construction site. The condition of excessive thixotropy or shear thickening of the pumped concrete can occur under the high pump pressure or the shearing action, so that the fluidity, the cohesiveness and the water retention property are quickly lost. These problems severely plague concrete production and construction technicians and hinder normal progress of engineering construction.
Ultrasonic waves, which are sound waves with a frequency higher than 20 khz, have many advantages of high power, strong penetration capability, good directivity and the like due to high frequency, and are widely applied to the fields of industry, agriculture, military, medicine and the like. The ultrasonic wave can be transmitted in three media of solid phase, liquid phase and gas phase. When ultrasonic waves propagate in a medium, the ultrasonic waves interact with the medium to cause physical and chemical changes of the medium, so that a series of mechanical, thermal, chemical and electromagnetic ultrasonic effects are caused: mechanical vibration effects, cavitation effects, thermal effects, and chemical effects.
Therefore, how to improve the rheological property of concrete pumping based on the ultrasonic effect is a technical problem which needs to be solved by the technical personnel in the field.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information is prior art that is known to a person skilled in the art.
Disclosure of Invention
The invention provides a device and a method for digitally regulating and controlling rheological characteristics of pumped concrete based on an ultrasonic effect, which are used for improving cohesiveness, water retention and fluidity of the concrete in a pumping process. By improving the rheological property of the pumped concrete, the concrete conveying efficiency of a construction site is improved, and the completion of engineering with quality and quantity guarantee is ensured.
In order to solve the technical problems, the invention comprises the following technical scheme:
a device for digitally regulating rheological characteristics of pumped concrete comprises:
the ultrasonic generator generates high-frequency alternating current through the ultrasonic generator and converts the high-frequency alternating current into ultrasonic oscillation with certain power output;
the ultrasonic transducer is connected with the ultrasonic generator and converts the ultrasonic oscillation generated by the ultrasonic generator into mechanical vibration;
the self-climbing seat comprises clamping seats and rollers, the two clamping seats are in clamping connection through bolts, the rollers are tightly held on the concrete pump pipe, and the rollers are driven by a motor reducer to drive the self-climbing seat to roll along the concrete pump pipe;
and the motor and the ultrasonic generator are connected with the central control platform.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the invention provides a device and a method for digitally regulating rheological characteristics of pumped concrete, wherein the regulating device is arranged on a concrete pump pipe at intervals and comprises an ultrasonic generator, an ultrasonic transducer, a self-climbing seat and a central control platform; the self-climbing seat is provided with a pair of clamping seats clamped by bolts, the roller is tightly held on the concrete pump pipe and driven by the motor to roll and drive the self-climbing seat to roll along the concrete pump pipe; the clamping seat is provided with an ultrasonic transducer on the outer side, under the control of the central control platform, the ultrasonic transducer converts ultrasonic oscillation generated by an ultrasonic generator connected with the ultrasonic transducer into mechanical vibration, and the mechanical vibration is transmitted to pumped concrete in a concrete pump pipe through the concrete pump pipe, so that the pumped concrete generates mechanical vibration, and meanwhile, tiny bubbles are generated in the pumped concrete, and the rheological property of the pumped concrete is improved in cooperation.
Further, the central control platform comprises a mobile phone or a tablet computer APP connected through WIFI or Bluetooth.
Furthermore, the ultrasonic transducer is installed on the outer side of the clamping seat, a mounting hole is formed in the side face of the clamping seat, and the mounting seat of the ultrasonic transducer is matched with the mounting hole, so that the ultrasonic transducer is fixed on the clamping seat.
Furthermore, a plurality of the regulating devices are distributed on the concrete pump pipe at certain intervals.
The invention also provides a pumped concrete rheological characteristic digital regulation and control method, which comprises the following steps:
step one, providing the pumping concrete rheological characteristic digital regulation and control device;
secondly, fixing the regulating and controlling device on the concrete pump pipe according to different intervals;
and step three, under the control of the central control platform, the ultrasonic transducer converts the ultrasonic oscillation generated by the ultrasonic generator into mechanical vibration, and the mechanical vibration is transmitted to the pumped concrete in the concrete pump pipe through the concrete pump pipe, so that the pumped concrete generates mechanical vibration, and simultaneously, micro bubbles are generated in the pumped concrete, and the rheological property of the pumped concrete is cooperatively improved.
Further, the central control platform comprises a mobile phone or a tablet computer APP connected through WIFI or Bluetooth.
Further, the ultrasonic transducer is installed on the outer side of the clamping seat.
Drawings
Fig. 1 is a schematic view of a pumped concrete rheological characteristic digital control device according to an embodiment of the present invention.
In the figure:
100-self-climbing seat; 200-concrete pump pipe; 300-ultrasonic transducer.
Detailed Description
The device and the method for digitally regulating rheological characteristics of pumped concrete provided by the invention are further described in detail with reference to the accompanying drawings and specific embodiments. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention. For convenience of description, the directions of "up" and "down" described below are the same as the directions of "up" and "down" in the drawings, but this is not a limitation of the technical solution of the present invention.
Example one
The concrete pumping rheological characteristic digital regulating device and method of the present invention are described in detail below with reference to fig. 1.
The concrete is a composite material which is formed by mixing cement, water, sand, stones, chemical additives and mineral admixtures if necessary and comprises gas-liquid-solid multiphase. The ultrasonic waves are innovatively applied to the pumped concrete, and the rheological property of the concrete can be improved by utilizing the mechanical vibration effect and the cavitation effect of the ultrasonic waves.
As shown in figure 1 of the drawings, in which,
a pumped concrete rheological characteristic digital regulating and controlling device comprises an ultrasonic generator (not shown), a self-climbing seat 100, an ultrasonic transducer 300 and a central control platform (not shown);
generating high-frequency alternating current by an ultrasonic generator, and converting the high-frequency alternating current into ultrasonic oscillation with certain power output;
the ultrasonic transducer 300 is connected to an ultrasonic generator, and converts ultrasonic oscillation generated by the ultrasonic generator into mechanical vibration;
the self-climbing seat 100 comprises clamping seats and rollers, the two clamping seats are clamped and connected through bolts, the rollers are tightly held on the concrete pump pipe 200, and the rollers are driven to drive the self-climbing seat 100 to roll along the concrete pump pipe 200 under the driving of a motor reducer;
the motor and the ultrasonic generator are connected with the central control platform, ultrasonic waves with different frequencies and different powers are set through the central control platform, and the distance, the moving distance and the speed of the regulating device can also be set, so that the digital work of the whole regulating device is realized.
Specifically, the embodiment provides a pumped concrete rheological characteristic digital regulating and controlling device, which is arranged on a concrete pump pipe 200 at intervals and comprises an ultrasonic generator, an ultrasonic transducer 300, a self-climbing seat 100 and a central control platform; the self-climbing seat 100 is provided with a pair of clamping seats clamped by bolts, the roller is tightly held on the concrete pump pipe 200 and driven by the motor to roll and drive the self-climbing seat to roll along the concrete pump pipe 200; the outer side of the clamping seat is provided with an ultrasonic transducer 300, under the control of the central control platform, the ultrasonic transducer 300 converts ultrasonic oscillation generated by an ultrasonic generator connected with the ultrasonic transducer into mechanical vibration, and the mechanical vibration is transmitted to pumped concrete in the concrete pump pipe 200 through the concrete pump pipe 200, so that the pumped concrete generates mechanical vibration, and meanwhile, tiny air bubbles are generated in the pumped concrete to improve the rheological property of the pumped concrete in a cooperative manner.
Particularly, under the action of ultrasonic waves of the regulating and controlling device, the pumped concrete can generate mechanical vibration which is equal to a secondary stirring effect, the homogeneity of the pumped concrete is improved, and the pumped concrete is prevented from segregation, bleeding and slump loss. Meanwhile, the cavitation effect of the ultrasonic waves on the pumped concrete is equal to the effect of the air entraining agent, and micro bubbles are generated in the pumped concrete, so that the friction resistance among concrete aggregates is reduced, the lubricating effect among the concrete aggregates is enhanced, and the plastic viscosity and the yield stress of the pumped concrete are reduced; on the other hand, the shear deformation of a lubricating layer of the pumped concrete can be reduced, the pumping friction resistance is weakened, and the fluidity of the pumped concrete in the concrete pump pipe 200 is comprehensively improved. In addition, the micro bubbles generated by the cavitation effect enable the water in the pumped concrete to be distributed on the surface of the pumped concrete, so that the free water content is reduced, the bleeding quantity of the pumped concrete is reduced, and the rheological property of the pumped concrete is synergistically improved. In this embodiment, more preferably, for convenient material taking, save cost, portable central control platform includes cell-phone or panel computer APP by WIFI or bluetooth connection.
In this embodiment, it is more preferable that the ultrasonic transducer 300 is mounted on the outer side of the clamping base, a mounting hole is formed on the side surface of the clamping base, and the mounting base of the ultrasonic transducer 300 is matched with the mounting hole, so as to fix the ultrasonic transducer on the clamping base. In this embodiment, it is more preferable that the control device has a plurality of control devices, and the control devices are movably assembled and disassembled, and the plurality of control devices are fixed on the concrete pump pipe 200 at different intervals.
With continued reference to fig. 1, the present invention further provides a pumped concrete rheological characteristic digital control method, which includes:
step one, providing the pumping concrete rheological characteristic digital regulation and control device;
secondly, fixing the regulating and controlling device on the concrete pump pipe 200 according to different intervals;
and step three, under the control of the central control platform, the ultrasonic transducer 300 converts the ultrasonic oscillation generated by the ultrasonic generator into mechanical vibration, and the mechanical vibration is transmitted to the pumped concrete in the concrete pump pipe through the concrete pump pipe, so that the pumped concrete generates mechanical vibration, and simultaneously, micro bubbles are generated in the pumped concrete, and the rheological property of the pumped concrete is cooperatively improved.
Compared with the prior art, the pumped concrete rheological property digital regulation and control method provided by the invention has the advantages that:
(1) the mechanical vibration effect of the ultrasonic effect is utilized to improve the concrete homogeneity and prevent the pumped concrete from segregation, bleeding and slump loss.
(2) The cavitation effect of the ultrasonic effect is utilized to enhance the lubricating effect among the aggregates of the pumped concrete, reduce the plastic viscosity and the yield stress of the pumped concrete, reduce the pumping friction resistance of the pumped concrete and improve the fluidity of the pumped concrete in the pumping process. The method improves the rheological property of the pumped concrete, improves the delivery efficiency of the pumped concrete on the construction site, and ensures the completion of the engineering with guaranteed quality and quantity.
The embodiment is based on the ultrasonic effect, provides a pumped concrete rheological characteristic digital regulation and control method based on the ultrasonic effect, and improves the cohesiveness, water retention and fluidity of the pumped concrete in the pumping process.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples. The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. The digital control device for rheological characteristics of pumped concrete is characterized by comprising:
the ultrasonic generator generates high-frequency alternating current through the ultrasonic generator and converts the high-frequency alternating current into ultrasonic oscillation with certain power output;
the ultrasonic transducer is connected with the ultrasonic generator and converts the ultrasonic oscillation generated by the ultrasonic generator into mechanical vibration;
the self-climbing seat comprises clamping seats and rollers, the two clamping seats are in clamping connection through bolts, the rollers are tightly held on the concrete pump pipe, and the rollers are driven by a motor reducer to drive the self-climbing seat to roll along the concrete pump pipe;
and the motor and the ultrasonic generator are connected with the central control platform.
2. The pumped concrete rheological characteristic digital control device of claim 1, wherein the central control platform comprises a mobile phone or a tablet computer APP connected by WIFI or Bluetooth.
3. The pumped concrete rheological characteristic digital control device according to claim 1, wherein the ultrasonic transducer is mounted on the outer side of the clamping seat.
4. The pumped concrete rheological characteristic digital control device of claim 1 wherein the plurality of control devices are distributed at intervals on the concrete pump pipe.
5. A pumped concrete rheological characteristic digital regulation and control method is characterized by comprising the following steps:
firstly, providing a pumped concrete rheological characteristic digital regulating and controlling device as claimed in claim 1;
secondly, fixing the regulating and controlling device on the concrete pump pipe according to different intervals;
and step three, under the control of the central control platform, the ultrasonic transducer converts the ultrasonic oscillation generated by the ultrasonic generator into mechanical vibration, and the mechanical vibration is transmitted to the pumped concrete in the concrete pump pipe through the concrete pump pipe, so that the pumped concrete generates mechanical vibration, and simultaneously, micro bubbles are generated in the pumped concrete, and the rheological property of the pumped concrete is cooperatively improved.
6. The method of claim 5, wherein the central control platform comprises a cell phone or tablet APP connected by WIFI or Bluetooth.
7. The method of claim 5, wherein the ultrasonic transducer is mounted outside of the clamping shoe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010764700.3A CN111877766A (en) | 2020-08-03 | 2020-08-03 | Device and method for digitally regulating rheological characteristics of pumped concrete |
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| CN202010764700.3A CN111877766A (en) | 2020-08-03 | 2020-08-03 | Device and method for digitally regulating rheological characteristics of pumped concrete |
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