CN111055378B - Concrete intelligent pumping system and operation method - Google Patents
Concrete intelligent pumping system and operation method Download PDFInfo
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- CN111055378B CN111055378B CN201911410437.1A CN201911410437A CN111055378B CN 111055378 B CN111055378 B CN 111055378B CN 201911410437 A CN201911410437 A CN 201911410437A CN 111055378 B CN111055378 B CN 111055378B
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- concrete
- rotating speed
- hopper
- stirring
- torque
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/10—Mixing in containers not actuated to effect the mixing
- B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
- B28C5/14—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers the stirrers having motion about a horizontal or substantially horizontal axis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/0806—Details; Accessories
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B23/00—Pumping installations or systems
- F04B23/04—Combinations of two or more pumps
- F04B23/06—Combinations of two or more pumps the pumps being all of reciprocating positive-displacement type
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention discloses an intelligent concrete pumping system and an operation method thereof, wherein one end of an S pipe is connected with a conveying pipe, the other end of the S pipe is connected with a concrete cylinder, and the intelligent concrete pumping system also comprises stirring devices arranged at the left side and the right side of a hopper; the stirring device comprises a hydraulic motor, a speed reducer, stirring blades and a rotating shaft, the hydraulic motor drives the stirring blades to rotate after the speed reducer decelerates, a concrete piston I, II is respectively installed in a concrete cylinder I, II, an information acquisition and measurement module comprises a torque rotating speed sensor and a data storage unit, the torque rotating speed sensor is installed on the left side and the right side of the stirring device, and an intelligent control module comprises an error comparison unit and a feedback adjustment unit. And detecting the torque and the rotating speed of the stirring blade in the rotating process through a torque rotating speed sensor, and adjusting the rotating speed through a feedback adjusting unit after correction. The invention has simple structure, and achieves the purposes of reducing stirring energy consumption and improving the material suction rate by the method of adjusting the rotating speed of the stirring blade and not synchronizing the left rotating speed and the right rotating speed.
Description
Technical Field
The invention belongs to the technical field of concrete pumping, and particularly relates to an intelligent concrete pumping system and an operation method.
Background
Concrete pumping is widely applied to the construction of basic facilities such as transportation, energy industry, super high floors and the like because time and labor are saved, labor intensity is reduced, the transportation and the pouring are integrated, the consumption of finished concrete is reduced, and the transportation efficiency is improved. In the pumping process, the flow field change in the hopper is complex, fresh concrete has time-varying property and thixotropy, namely, the rheological property changes all the time, the fluidity of the concrete is detected on the current construction site, the flowing capacity of the concrete is simply measured through slump and expansion degree before construction, the actual pumping process is in a state of certain pressure and certain initial speed, and researches show that the slump value obtained by a slump test is related to the yield strength, and the parameters for measuring the rheological property of the concrete are plastic viscosity and the yield strength. Therefore, the rotating speed and the average torque of the stirring blades need to be monitored in a time period, so that the change condition of the rheological property of the concrete in the hopper is monitored, and the fluidity of the concrete in the pumping process is conveniently judged.
In the existing pumping equipment, the stirring blades are basically located on the same shaft, experiments and simulations prove that when a concrete piston sucks materials, the rotation of the stirring blades is beneficial to the concrete piston at the material sucking side to suck the materials, the influence of the stirring blades at the non-material sucking side on the materials is small, however, the stirring blades are arranged on the same shaft and have the same rotating speed, so that the energy consumption is increased, and the expected material sucking effect is not achieved.
Therefore, how to reduce the energy consumption of pumping equipment while meeting the requirement of online detection of the flow performance of fresh concrete under the pumping condition of the pumping equipment is an urgent problem to be solved by technical personnel in the field.
Disclosure of Invention
In order to solve the problems, the invention provides an intelligent concrete pumping system and an operation method thereof, which are used for intelligently controlling the concrete pumping process.
The technical scheme adopted by the invention is as follows:
an intelligent concrete pumping system, comprising: the system comprises a hopper, an S pipe, a conveying pipe, a stirring device, a concrete piston I, a concrete piston II, a concrete cylinder I, a concrete cylinder II, an information acquisition and measurement module and an intelligent control module; one end of the S pipe is connected with the conveying pipe, and the other end of the S pipe is connected with the concrete cylinder; the stirring device comprises a hydraulic motor, a speed reducer, stirring blades and a rotating shaft, wherein the stirring device is respectively arranged on the left side and the right side of the hopper, the stirring blades are fixedly connected with the rotating shaft, and the hydraulic motor is adopted to drive the stirring blades to rotate after being decelerated by the speed reducer; the concrete piston I, II is arranged in the concrete cylinder I, II in a matching way; the information acquisition and measurement module comprises a torque and rotation speed sensor and a data storage unit, wherein the torque and rotation speed sensor is respectively arranged in the stirring devices at the left side and the right side, the installation position of the torque and rotation speed sensor is between the speed reducer and the rotating shaft and is used for detecting the torque and the rotation speed of the stirring blades in the rotation process, and the data storage unit is used for recording the torque and the rotation speed measured by the torque and rotation speed sensor; the intelligent control module comprises an error comparison unit and a feedback regulation unit.
The intelligent concrete pumping system is characterized in that the stirring blades are independently controlled and rotated on the left side and the right side of the hopper, the installation axes of the stirring blades are the same, but the rotation speed directions are the same while the rotation speeds can be different during working.
The concrete intelligent pumping system is characterized in that the concrete cylinder I and the concrete cylinder II are continuously and alternately changed for sucking and pushing materials, and the change period is consistent with the reversing time T of the S pipe; if the concrete cylinders I and II are in a material suction state, the corresponding hopper area is defined as a hopper material suction side, the corresponding concrete cylinder is defined as a material suction cylinder, the other hopper area is defined as a non-hopper material suction side, and the corresponding concrete cylinder is defined as a non-material suction cylinder.
The operation method of the intelligent concrete pumping system is characterized by comprising the following steps:
(1) providing a concrete intelligent pumping system as described above;
(2) filling the fresh concrete to a proper position of a hopper, starting a stirring device, and simultaneously starting pumping the fresh concrete;
(3) and setting an initial rotating speed according to whether the stirring blade is positioned on the material suction side of the hopper, wherein the rotating speed of the stirring blade on the material suction side of the hopper is n times (the value range of n is 1.5-2.5) of the rotating speed of the stirring blade on the material suction side of the non-hopper.
(4) The S pipe is connected with the non-suction cylinder, and the torque rotating speed sensor detects the average torque T of the stirring blade at the suction side of the hopper in the time T at the current rotating speed1And records T through the data storage unit1The value of (d);
(5) and (4) repeating the step (4), and recording the average torque T in the ith period by the data storage unit i2, 3. the error comparison unit in the intelligent control module compares T1、TiThe corrected rotating speed is calculated according to a set formula, and then the rotating speed of the stirring blade is adjusted through a feedback adjusting unit;
(6) and (5) repeating the step until the pumping is finished.
The operation method of the intelligent concrete pumping system is characterized in that the corrected rotating speed in the step (5) meets the following conditions:
n＝n0+Δn
in the formula: n is the corrected rotation speed, Deltan is the corrected rotation speed, n0For the current rotational speed, T1Is the average torque, T, of the stirring blade at the material suction side of the hopper in the 1 st periodiThe average torque of the stirring blade at the material suction side of the hopper in the ith period is shown, k is a correction coefficient, and k is (rho g-45 tau)0)/(ρg+45τ0) K is in the range of 0.1 to 0.5, τ0Rho is the concrete density and g is the acceleration of gravity for yield stress.
The operation method of the intelligent concrete pumping system is characterized in that the rotating speed of the stirring blade in the step (3) is not more than 2 times of the initial rotating speed at the maximum rotating speed, and is not less than 0.4 times of the initial rotating speed at the minimum rotating speed.
Drawings
Fig. 1 is a block diagram of a concrete intelligent pumping system.
FIG. 2 is a flow chart of operation of the intelligent concrete pumping system.
In the figure: 1-hopper, 2-S pipe, 3-delivery pipe, 4-concrete cylinder I, 5-concrete piston I, 6-concrete cylinder II, 7-concrete piston II, 8-torque speed sensor, 9-speed reducer, 10-hydraulic motor, 11-rotating shaft, 12-stirring blade.
Detailed Description
The invention is further described below with reference to specific examples.
The operation method of the intelligent concrete pumping system provided by the invention comprises the following specific steps:
(1) providing an intelligent concrete pumping system;
(2) filling the fresh concrete to a proper position of a hopper, starting a stirring device, and simultaneously starting pumping the fresh concrete;
(3) and setting an initial rotating speed according to whether the stirring blade is positioned on the material suction side of the hopper, wherein the rotating speed of the stirring blade on the material suction side of the hopper is n times (the value range of n is 1.5-2.5) of the rotating speed of the stirring blade on the material suction side of the non-hopper.
More specifically, if the initial rotation speed of the stirring blade on the hopper suction side is set to 36r/min and n is 2, the rotation speed of the stirring blade on the non-hopper suction side is 18 r/min.
(4) The S pipe is connected with the non-suction cylinder, and the torque rotating speed sensor detects the average torque T of the stirring blade at the suction side of the hopper in the time T at the current rotating speed1And records T through the data storage unit1The value of (d);
more specifically, T is the time of the concrete piston to suck, and the torque speed sensor detects the average torque T of the stirring blade at the material suction side of the hopper in the period of 2.5s at 36r/min1＝365N·m。
(5) And (4) repeating the step (4), and recording the average torque T in the ith period by the data storage unit i2, 3. the error comparison unit in the intelligent control module compares T1、TiThe corrected rotating speed is calculated according to a set formula, and then the rotating speed of the stirring blade is adjusted through a feedback adjusting unit;
more specifically, the density of the C30 concrete is 2290kg/m3The gravity acceleration is 10m/s2Yield stress of 260Pa, correction factor of 0.32, and T is given in the table belowi Group 3 examples.
| Period of time | Mean torque Ti(N·m) | Magnitude comparison of torques | Corrected speed (r/min) |
| 2 | 380 | T1＜T2 | 36.47 |
| 3 | 385 | T1＜T3 | 36.63 |
| 4 | 378 | T1＜T4 | 36.42 |
(6) And (5) repeating the step until the pumping is finished.
Claims (4)
1. An intelligent concrete pumping system, comprising: the system comprises a hopper, an S pipe, a conveying pipe, a stirring device, a concrete piston I, a concrete piston II, a concrete cylinder I, a concrete cylinder II, an information acquisition and measurement module and an intelligent control module; one end of the S pipe is connected with the conveying pipe, and the other end of the S pipe is connected with the concrete cylinder; the stirring device comprises a hydraulic motor, a speed reducer, stirring blades and a rotating shaft, wherein the stirring device is respectively arranged on the left side and the right side of the hopper, the stirring blades are fixedly connected with the rotating shaft, and the hydraulic motor is adopted to drive the stirring blades to rotate after being decelerated by the speed reducer; the concrete piston I, II is arranged in the concrete cylinder I, II in a matching way; the information acquisition and measurement module comprises a torque and rotation speed sensor and a data storage unit, wherein the torque and rotation speed sensor is respectively arranged in the stirring devices at the left side and the right side, and is arranged between the speed reducer and the rotating shaft and used for detecting the torque and the rotation speed of the stirring blades in the rotation process; the data storage unit is used for recording the torque and the rotating speed measured by the torque rotating speed sensor; the intelligent control module comprises an error comparison unit and a feedback regulation unit;
the concrete cylinder I and the concrete cylinder II are continuously and alternately changed for sucking and pushing materials, and the change period is consistent with the time T for reversing the S pipe; if the concrete cylinder I or the concrete cylinder II is in a material suction state, defining the corresponding hopper area as a hopper material suction side, and defining the concrete cylinder corresponding to the hopper area as a material suction cylinder; the hopper area at the other side is defined as a non-hopper material suction side, and the concrete cylinder corresponding to the hopper area is defined as a non-material suction cylinder;
the stirring blades are independently controlled and rotated at the left side and the right side of the hopper, the installation axes of the stirring blades are the same, and the rotating speeds are the same in direction but different in magnitude when the stirring blades work; the rotating speed of the stirring blade at the material suction side of the hopper is greater than that of the stirring blade at the material non-suction side of the hopper.
2. A method of operating the intelligent concrete pumping system of claim 1, comprising the steps of:
(1) providing a concrete intelligent pumping system as claimed in claim 1;
(2) filling the fresh concrete to a proper position of a hopper, starting a stirring device, and simultaneously starting pumping the fresh concrete;
(3) setting an initial rotating speed according to whether the stirring blade is positioned on the material suction side of the hopper or not, wherein the rotating speed of the stirring blade on the material suction side of the hopper is greater than that of the stirring blade on the material non-suction side of the hopper;
(4) the S pipe is connected with the non-suction cylinder, and the torque rotating speed sensor detects the average torque T of the stirring blade at the suction side of the hopper in the time T at the current rotating speed1And records T through the data storage unit1The value of (d);
(5) and (4) repeating the step (4), and recording the average torque T in the ith period by the data storage uniti2, 3. the error comparison unit in the intelligent control module compares T1、TiThe size of (a) is (b),calculating a correction rotating speed according to a set formula, and adjusting the rotating speed of the stirring blade through a feedback adjusting unit;
(6) and (5) repeating the step until the pumping is finished.
3. A method for operating the intelligent pumping system for concrete according to claim 2, wherein the corrected rotation speed in the step (5) satisfies the following condition:
Δn＝[(Ti-T1)×n0×k]/T1；
n＝n0+Δn；
in the formula: Δ n is the corrected speed, n0For the current rotational speed, T1Is the average torque, T, of the stirring blade at the material suction side of the hopper in the 1 st periodiThe average torque of the stirring blade at the material suction side of the hopper in the ith period is shown, k is a correction coefficient, and k is (rho g-45 tau)0)/(ρg+45τ0) K is in the range of 0.1 to 0.5, τ0Rho is the concrete density and g is the acceleration of gravity, which is the yield strength.
4. A method for operating the intelligent pumping system for concrete according to claim 2, wherein the rotating speed of the mixing blade in the step (3) has a maximum rotating speed not exceeding 2 times of the initial rotating speed and a minimum rotating speed not less than 0.4 times of the initial rotating speed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911410437.1A CN111055378B (en) | 2019-12-31 | 2019-12-31 | Concrete intelligent pumping system and operation method |
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| CN201911410437.1A CN111055378B (en) | 2019-12-31 | 2019-12-31 | Concrete intelligent pumping system and operation method |
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| CN111055378A CN111055378A (en) | 2020-04-24 |
| CN111055378B true CN111055378B (en) | 2021-02-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114800860B (en) * | 2021-01-29 | 2023-05-12 | 三一汽车制造有限公司 | Control method of stirring device, stirring device and pumping equipment |
| CN113187712B (en) * | 2021-04-28 | 2023-09-01 | 湘潭大学 | Piston movement speed matching method for improving suction performance of concrete pumping |
| CN113187711B (en) * | 2021-04-28 | 2023-07-14 | 湘潭大学 | Piston stroke matching method for improving pumping and sucking efficiency of concrete pump |
| CN115366252B (en) * | 2022-08-29 | 2023-07-25 | 湘潭大学 | Coaxial non-uniform concrete stirring device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2039848U (en) * | 1988-11-03 | 1989-06-21 | 北京建筑工程学院 | Portable computerized detector for concrete slump |
| JP3145488B2 (en) * | 1992-07-10 | 2001-03-12 | 三菱重工業株式会社 | Concrete pump S type gate valve sliding surface close contact device |
| CN102944670B (en) * | 2012-11-28 | 2015-03-04 | 徐州徐工施维英机械有限公司 | Method and device for detecting concrete slump of premixed concrete of mixer truck |
| CN107965430A (en) * | 2017-12-12 | 2018-04-27 | 北京中企卓创科技发展有限公司 | A kind of intelligent concrete using proximity sensor statistics input amount pumps |
| CN208323815U (en) * | 2018-06-21 | 2019-01-04 | 郑勇良 | Concrete slump real time monitoring adjustment device in a kind of concrete delivery truck |
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