CN113187712B - Piston movement speed matching method for improving suction performance of concrete pumping - Google Patents
Piston movement speed matching method for improving suction performance of concrete pumping Download PDFInfo
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- CN113187712B CN113187712B CN202110469454.3A CN202110469454A CN113187712B CN 113187712 B CN113187712 B CN 113187712B CN 202110469454 A CN202110469454 A CN 202110469454A CN 113187712 B CN113187712 B CN 113187712B
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- piston
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Classifications
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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
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/20—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by changing the driving speed
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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
- B28C5/16—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 vertical or steeply inclined 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
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/02—Controlling the operation of the mixing
- B28C7/022—Controlling the operation of the mixing by measuring the consistency or composition of the mixture, e.g. with supply of a missing component
- B28C7/026—Controlling the operation of the mixing by measuring the consistency or composition of the mixture, e.g. with supply of a missing component by measuring data of the driving system, e.g. rotational speed, torque, consumed power
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Structural Engineering (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention provides a piston movement speed matching method for improving the suction performance of concrete pumping, which mainly comprises the following steps: (1) The rotation speed of the stirring blade in the concrete sucking process is given, and the average torque T of the stirring blade at the rotation speed is measured by a torque sensor 0 Then, the optimal speed of the piston movement is calculated and corrected, and the speed of the piston movement is regulated by a feedback regulation module. (2) The piston sucking movement speed is divided into three phases, namely a piston accelerating movement phase, a piston uniform movement phase and a piston decelerating movement phase. When the concrete fluidity is good, the movement speed of the piston can be increased, the sucking frequency of the piston in unit time is increased while the sucking property is ensured, when the concrete fluidity is low, the movement speed of the piston can be reduced, the sucking quantity is improved, the reversing frequency of an S pipe is reduced, the abrasion of wearing parts such as eye rings is reduced, and the energy consumption is reduced.
Description
Technical Field
The invention provides the technical field of pumping and sucking performance lifting of concrete, and particularly relates to a piston movement speed matching method for pumping and sucking performance lifting of concrete.
Background
With the rapid development of the economy in China and the sustainable development of the construction of domestic infrastructure, the method drives the domestic commercial concrete industry to fly, promotes the high-speed development of engineering machinery and related concrete conveying machinery, provides a larger market space for concrete pump trucks, and has been widely used.
In the process of conveying the concrete, the mobility of the concrete when the concrete reaches a pumping site can be affected to a certain extent due to the time and the conveying route, so that the moving speed of the concrete is lower than that of the piston when the moving speed of the piston is too high if the mobility of the concrete is too poor in the process of sucking the concrete by the piston cylinder after the concrete is discharged to the pumping hopper. A vacuum area is formed between the concrete and the piston, and the material absorbing performance of the concrete is reduced. Therefore, the piston movement speed matching method for improving the suction performance of the concrete pumping ensures that the concrete and the piston move synchronously, and has obvious practical significance for reducing the vacuum area between the concrete and the piston.
Disclosure of Invention
In order to solve the problems, the invention provides a piston movement speed matching method for improving the suction performance of concrete pumping.
The invention adopts the technical scheme for solving the technical problems that:
the method for matching the motion speed of the concrete pumping suction lifting piston is used in combination with the existing concrete mixture suction system, and specifically comprises the following steps:
(1) Setting the velocity v of the piston in the constant velocity stage 0 And the time of each stage;
(2) The torque sensor records the average torque T of the stirring blade in a certain time 0 ；
(3) Repeating the step (2), and recording the average torque T of the stirring blade in the ith period by using the torque sensor i ；
(4) The data acquisition and control module calculates a speed change value Deltav through a set formula and corrects the constant-speed stage speed v of the piston 2 ；
(5) And (5) repeating the step (4) until the pumping is finished.
The method for matching the motion speed of the pumping sucking lifting piston of the concrete pump is characterized in that the motion of the piston is divided into three stages of acceleration, uniform speed and deceleration, and the function of each stage is specifically as follows:
0≤t≤t 1 ，
t 1 ≤t≤t 2 ，v 2 ＝v 0 +Δv
t 2 ≤t≤t 3 ，
wherein: v 1 、v 2 、v 3 For the acceleration, uniform and deceleration phases of the piston, t 1 、t 2 、t 3 For the time of the piston acceleration, constant velocity and deceleration phases, v 0 The motion speed of the piston in the constant-speed stage is preset, and Deltav is a speed change value.
The method for matching the motion speed of the pumping sucking lifting piston of the concrete pump is characterized in that the concrete formula for speed correction is as follows:
wherein: t (T) 0 T is the average torque of the stirring blade in a certain time i The average torque of the stirring blade in the ith period, alpha is a correction coefficient,alpha has a value range of 1-5, tau 0 Is the yield stress (Pa), ρ is the concrete density (kg/m) 3 ) The specific piston movement speed variation is shown in fig. 1.
An adjusting device for matching the movement speed of a piston for improving the suction performance of concrete pumping, comprising: piston cylinder I (1), concrete piston (2), torque sensor (3), hydraulic motor (4), hopper (5), S pipe (6), stirring vane and axle (7), piston cylinder (II) (8), wherein, piston movement speed monitoring system constitute by hydraulic motor (4), data acquisition and control module, variable speed output device hydraulic motor (4) link to each other with variable speed output device, variable speed output device links to each other with the (mixing) shaft.
According to the piston movement speed matching and adjusting device for improving the suction performance of concrete pumping, in the piston movement speed monitoring system, a hydraulic motor provides motive power, the motive power is transmitted to a variable speed output device after passing through a data acquisition and control module, the variable speed output device outputs a certain regular rotating speed to a stirring shaft, and then the movement speed of a piston is set according to the function.
According to the piston movement speed matching adjusting device for improving the suction performance of the concrete pumping, the piston movement speed is adjusted, so that the amount of sucked concrete in the piston cylinder is more, the reversing times of the S pipe are reduced, and the pumping efficiency of the pumping suction system is improved.
Drawings
FIG. 1 is a concrete pumping flow chart.
FIG. 2 is a device diagram of a concrete pumping system.
Fig. 3 is a diagram of the velocity of piston movement.
In the figure: 1-piston cylinder (I), 2-concrete piston, 3-torque sensor, 4-hydraulic motor, 5-hopper, 6-S pipe, 7-stirring blade and shaft, 8-piston cylinder (II)
Detailed Description
The invention is further described below in connection with specific embodiments.
A method for matching the motion speed of a pumping sucking lifting piston of a concrete pump comprises the following detailed steps:
(1) Providing a concrete mixture sucking system;
(2) When concrete is added into a mixing hopper, a stirring device is started, and when the concrete is added into the mixing hopper and the mixing hopper is in a certain position, the initial movement speed v of a piston of a suction cylinder is set 0 Let piston start to move, pump start, =1 m/s;
(3) The torque sensor detects the average torque T of the stirring blade in a certain time under the current rotating speed 0 And record T through the data storage unit 0 Is a numerical value of (2);
more specifically, the torque sensor detects the average torque T of the stirring blade at the rotation speed of 25r/min within 2.5s of the single suction time of the piston 0 ＝355N·m。
(4) Repeating the step (3), and recording the average torque T in the ith period by the data storage unit i The values of (i=2, 3··of), the data acquisition and control moduleComparison T 0 And T is 1 、T i The magnitude (i=2, 3··is) of the piston, the corrected piston movement speed is calculated according to a set formula, and then the piston movement speed is regulated by a feedback regulating unit;
in more detail, in this example, the acceleration period and the deceleration period of the piston are both 0.2s, and the constant speed period is 2.1s.
In more detail, in this example, the C35 concrete density is 2400kg/m 3 The yield stress was 300Pa, the correction coefficient was 2.85, and T is given in the following table i The speed of the constant velocity phase is calculated according to a correction formula.
| Cycle time | Average torque T i (N·m) | Torque comparison | Corrected piston constant velocity phase velocity (m/s) |
| 2 | 375 | T 2 >T 0 | 0.84 |
| 3 | 361 | T 3 >T 0 | 0.95 |
| 4 | 345 | T 4 <T 0 | 1.08 |
(5) And (4) repeating the step (4) until the pumping is finished.
Claims (3)
1. A piston movement speed matching method for improving the suction performance of concrete pumping is used by combining with the existing concrete mixture suction system, and specifically comprises the following steps:
(1) Setting the velocity v of the piston in the constant velocity stage 0 And the time of each stage;
(2) The torque and rotation speed sensor records the average torque T of the stirring blade in a certain time 0 ；
(3) Repeating the step (2), and recording the average torque T of the stirring blade in the ith period by using the torque rotation speed sensor i ；
(4) Calculating a speed change value delta v through a set formula, and correcting the constant-speed stage speed v of the piston 2 The method comprises the steps of carrying out a first treatment on the surface of the The set formula is specifically that
Wherein: t (T) 0 T is the average torque of the stirring blade in a certain time i The average torque of the stirring blade in the ith period, a is a correction coefficient,a has a value ranging from 1 to 5, tau 0 Is the yield stress (Pa), ρ is the concrete density (kg/m) 3 )；
(5) And (5) repeating the step (4) until the pumping is finished.
2. The method for matching the movement speed of a piston for improving the suction performance of concrete pumping according to claim 1, wherein the movement of the piston in the step (1) is divided into an acceleration stage, a constant speed stage and a deceleration stage, and the function of each stage is specifically as follows:
0≤t≤t 1 ，
t 1 ≤t≤t 2 ，v 2 ＝v 0 +Δv
t 2 ≤t≤t 3 ，
wherein: v 1 、v 2 、v 3 The speed of the piston in the acceleration, uniform speed and deceleration stages is t is time, t 1 、t 2 、t 3 V is the time of the acceleration, constant velocity and deceleration phases of the piston 0 The motion speed of the piston in the constant-speed stage is preset, and Deltav is a speed change value.
3. The method for matching the piston movement speed for improving the suction performance of concrete pumping according to claim 1, which is used in combination with the existing concrete mixture suction system, and is characterized by comprising the following steps: piston cylinder I (1), concrete piston (2), torque sensor (3), hydraulic motor (4), hopper (5), S pipe (6), stirring vane and stirring shaft (7), piston cylinder II (8); wherein the concrete piston is arranged in the piston cylinder; the stirring blade is arranged on a stirring shaft, and the stirring shaft is connected with the torque sensor and then connected with the hydraulic motor; one end of the S pipe is connected with the piston cylinder, and the other end is connected to the hopper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110469454.3A CN113187712B (en) | 2021-04-28 | 2021-04-28 | Piston movement speed matching method for improving suction performance of concrete pumping |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110469454.3A CN113187712B (en) | 2021-04-28 | 2021-04-28 | Piston movement speed matching method for improving suction performance of concrete pumping |
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| Publication Number | Publication Date |
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| CN113187712A CN113187712A (en) | 2021-07-30 |
| CN113187712B true CN113187712B (en) | 2023-09-01 |
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| CN202110469454.3A Active CN113187712B (en) | 2021-04-28 | 2021-04-28 | Piston movement speed matching method for improving suction performance of concrete pumping |
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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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1987100A (en) * | 2006-12-12 | 2007-06-27 | 浙江大学 | Metering method and system for real time discharge volume of piston type concrete pump |
| CN201474886U (en) * | 2009-05-31 | 2010-05-19 | 长沙中联重工科技发展股份有限公司 | Concrete pumping device |
| CN201568245U (en) * | 2009-05-31 | 2010-09-01 | 长沙中联重工科技发展股份有限公司 | Concrete pumping unit and concrete pumping device |
| CN103557149A (en) * | 2013-10-29 | 2014-02-05 | 中联重科股份有限公司 | Control equipment, method and system of concrete piston and engineering machinery |
| CN111055378A (en) * | 2019-12-31 | 2020-04-24 | 湘潭大学 | Concrete intelligent pumping system and operation method |
-
2021
- 2021-04-28 CN CN202110469454.3A patent/CN113187712B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1987100A (en) * | 2006-12-12 | 2007-06-27 | 浙江大学 | Metering method and system for real time discharge volume of piston type concrete pump |
| CN201474886U (en) * | 2009-05-31 | 2010-05-19 | 长沙中联重工科技发展股份有限公司 | Concrete pumping device |
| CN201568245U (en) * | 2009-05-31 | 2010-09-01 | 长沙中联重工科技发展股份有限公司 | Concrete pumping unit and concrete pumping device |
| CN103557149A (en) * | 2013-10-29 | 2014-02-05 | 中联重科股份有限公司 | Control equipment, method and system of concrete piston and engineering machinery |
| CN111055378A (en) * | 2019-12-31 | 2020-04-24 | 湘潭大学 | Concrete intelligent pumping system and operation method |
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| CN113187712A (en) | 2021-07-30 |
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