CN102220969B - Concrete pumping method for preventing pipe blockage and relieving method for preventing pipe blockage - Google Patents
Concrete pumping method for preventing pipe blockage and relieving method for preventing pipe blockage Download PDFInfo
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- CN102220969B CN102220969B CN 201110161157 CN201110161157A CN102220969B CN 102220969 B CN102220969 B CN 102220969B CN 201110161157 CN201110161157 CN 201110161157 CN 201110161157 A CN201110161157 A CN 201110161157A CN 102220969 B CN102220969 B CN 102220969B
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Abstract
The invention discloses a concrete pumping method for preventing pipe blockage and a relieving method for preventing pipe blockage. The concrete pumping method comprises the following steps of: pumping concrete by using a first pumping displacement and a first pumping thrust, and detecting pumping pressure by using a pressure sensor; when the detected pumping pressure exceeds a threshold value, pumping concrete for a first preset time by using second pumping displacement smaller than the first pumping displacement; after the first preset time, if the detected pumping pressure is within a normal range, increasing the second pumping displacement to the first pumping displacement; and if the detected pumping pressure is not within the normal range, pumping concrete by using a second pumping thrust greater than the first pumping thrust on the basis of maintaining the second pumping displacement. By adopting the technical scheme of reducing pumping displacement and increasing pumping thrust, various working conditions are fully considered, pipe blockage is pretreated, and thus, the phenomenon of pipe blockage can be effectively reduced or relieved.
Description
Technical field
The present invention relates to a kind of method of releiving that prevents the concrete pumping method of plugging and in the concrete pumping process, prevent plugging.
Background technique
Pump concrete has fast, the cost-effective characteristics of speed of application; but concrete pumping equipment often can be because a variety of causes causes the plugging phenomenon in pumping procedure; this has brought many troubles for concrete production enterprise and unit in charge of construction, has affected project progress and quality.Therefore how avoiding and reduce the plugging phenomenon, is the key that improves construction technology.
Early stage pump truck is when the plugging phenomenon occurs, and the pumping pressure resistance increases, and pressure raises, and serious meeting causes the damage of booster or oil hydraulic pump.Thereby the transfer pump operator must energy in pumping construction concentrate, and note the reading of pumping pressure table constantly, in case find that pressure gauge reading increases suddenly, a manual anti-pump 2-3 stroke immediately, pump just just can be got rid of the plugging phenomenon again.
Existing pipe-blocking-proof control device is this micro-judgment to be merged control in programmable controller, the pumping pressure value of utilizing programmable controller to read pressure transducer is judged the plugging situation, utilize programmable controller that the pumping state is transformed into anti-pump state, alleviate concrete plugging phenomenon with this.
Fig. 1 shows the electrical equipment theory diagram of existing pipe-blocking-proof control system.As shown in Figure 1, existing system is comprised of pumping pressure sensor 1, programmable controller 2, relay 3 and solenoid directional control valve 4 usually, when plugging will occur, pressure in the pipeline can occur unusually, pressure transducer 1 can pass to programmable controller 2 with this abnormal signal, programmable controller 2 sends warning immediately, simultaneously by relay 3 control solenoid directional control valves 4, and then make pumping switch to anti-pump state, and automatically adjust anti-pump number of times or carry out positive pump dredging according to the situation of plugging.
Above-mentioned treatment measures are fairly simple, can not process plugging according to the situation of load and regulate in real time.In addition, the event after above-mentioned treatment measures only occur plugging is processed, and does not consider the pretreatment of pipe-blocking-proof.
Summary of the invention
The object of the present invention is to provide a kind of concrete pumping method, with according to loading condition to the control of releiving of concrete pumping process, prevent plugging.The present invention also aims to provide a kind of method of releiving that in the concrete pumping process, prevents plugging.
For this reason, according to an aspect of the present invention, provide a kind of concrete pumping method that prevents plugging, may further comprise the steps: adopted the first pump displacement and the first pumping thrust to carry out concrete pumping, and utilize pressure transducer testing pump pressurization pressure; When the described pumping pressure that detects surpasses threshold value, adopt the second pump displacement less than described the first pump displacement to make first scheduled time of concrete pumping; And after described first scheduled time, if the pumping pressure that detects then is increased to described the first pump displacement with described the second pump displacement in normal range (NR); If the described pumping pressure that detects not in normal range (NR), then adopts on the basis of keeping described the second pump displacement and carries out concrete pumping greater than the second pumping thrust of described the first pumping thrust.
Further, before above-mentioned employing the first pump displacement and the first pumping thrust are carried out the step of concrete pumping, also be included in the back and forth movable repeatedly step so that the concrete in the hopper is loosened of the distributing valve that makes concrete pump in the process of the material such as termination of pumping and concrete piston.
Further, above-mentioned the first pumping thrust is corresponding with the rod chamber oil-feed of the master cylinder of concrete pump, and described the second pumping thrust is corresponding with the rodless cavity oil-feed of described master cylinder.
Further, above-mentioned the second pump displacement is 30～50% of the first pump displacement, and described first scheduled time is 60～100 seconds, and the threshold value of described pumping pressure is 1.5 times of described the first pumping thrust.
According to a further aspect in the invention, provide a kind of concrete pumping method that prevents plugging, may further comprise the steps: adopted the first pump displacement and the first pumping thrust to carry out concrete pumping, and utilize pressure transducer to detect described pumping pressure; When described pumping pressure surpasses threshold value, adopt less than the second pump displacement of described the first pump displacement with greater than the second pumping thrust of the first pumping thrust and make second scheduled time of concrete pumping; And after described second scheduled time, simultaneously or carry out in tandem following two operations: described the second pump displacement is increased to the first pump displacement, the second pumping thrust is reduced to described the first pumping thrust.
Further, above-mentioned concrete pumping method also is included in before the pumping, makes distributing valve and the reciprocal movable repeatedly step so that the concrete in the hopper is loosened of concrete piston of concrete pump.
Further, above-mentioned the first pumping thrust is corresponding with the rod chamber oil-feed of the master cylinder of concrete pump, and described the second pumping thrust is corresponding with the rodless cavity oil-feed of described master cylinder.
Further, above-mentioned the second pump displacement is 60～70% of the first pump displacement, and described first scheduled time is 30～60 seconds.
According to another aspect of the invention, a kind of method of releiving that prevents plugging in the concrete pumping process is provided, in the concrete pumping process, real-time testing pump pressurization pressure is if described pumping pressure is higher than threshold value, then reduce pump displacement, after this, normal if described pumping pressure recovers, then recover original pump displacement, otherwise improve pumping thrust, with the plugging phenomenon of releiving.
The present invention also provides a kind of method of releiving that prevents plugging in the concrete pumping process, in the concrete pumping process, real-time testing pump pressurization pressure is if described pumping pressure is higher than threshold value, then reduce pump displacement and improve pumping thrust, with the plugging phenomenon of releiving.
The present invention adopts the technological means that reduces pump displacement and improve pumping thrust, has taken into full account various operating modes and the plugging phenomenon has been carried out pretreatment, so, can effectively reduce or alleviate the plugging phenomenon.The measure of existing concrete pump pipe-blocking-proof is comparatively simple, and only automatic pump reversing is back and forth several, does not often have actual effect, and does not consider that the plugging that causes owing to concrete coagulation in waiting material process may.
Except purpose described above, feature and advantage, other purpose, feature and advantage that the present invention has are described in further detail in connection with accompanying drawing.
Description of drawings
Consist of this specification a part, be used for further understanding accompanying drawing of the present invention and show the preferred embodiments of the present invention, and be used for illustrating principle of the present invention with specification.Among the figure:
Fig. 1 shows the theory diagram according to existing pipe-blocking-proof control system;
Fig. 2 shows the schematic representation according to concrete pump of the present invention;
Fig. 3 shows the control block diagram according to concrete pump of the present invention;
Fig. 4 shows the handling process according to the first embodiment of concrete pumping method of the present invention;
Fig. 5 shows the flow process flow process according to the second embodiment of concrete pumping method of the present invention;
Fig. 6 shows according to the releive handling process of method of first of plugging that prevents in the concrete pumping process of the present invention; And
Fig. 7 shows according to the releive handling process of method of second of plugging that prevents in the concrete pumping process of the present invention.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
Fig. 2 shows the schematic representation of concrete pump, as shown in Figure 2, concrete conveyance pumping mechanism is mainly by two master cylinders 111 and 113, two concrete cylinders 107 and 109, hopper 101, distributing valve 103 (being the S valve), discharge port 105, and drive swing arm and two oscillating oil cylinder (not shown)s compositions that distributing valve 103 swings.
Fig. 3 shows the control block diagram according to concrete pump of the present invention.In conjunction with reference to Fig. 2 and Fig. 3, master cylinder solenoid valve 121, tilt cylinder solenoid valve 123, high-pressure solenoid valve 125, low-voltage solenoid valve 127, discharge of main pump valve 129 are electrically connected with industrial control unit (ICU) 119, and pressure transducer 117 and approach switch 115 are electrically connected with controller 119.Controller 119 is directly controlled action logic and the rate of pumping of master cylinder and tilt cylinder.
When two master cylinders 111,113 piston alternate reciprocating motion, the piston in two concrete cylinders is alternate reciprocating motion thereupon, so as in two concrete cylinders one another carries out pumping when carrying out suction.Distributing valve 103 1 termination discharge ports 105, the other end is connected with swing arm, under the oscillating oil cylinder effect, can swing, and is communicated with to select one with two master cylinders 111,113, certainly also can be communicated with hopper 101.
When the pumped concrete earth material, the commutation signal that controller provides according to approach switch 115 or other hydraulic commutator, control master cylinder solenoid valve 121 makes two master cylinder commutations, so that two master cylinders carry out alternating motion, distributing valve 103 swings, is communicated with the master cylinder of execution pump action in two master cylinders simultaneously, has so realized concrete uninterrupted pumping.
During anti-pump, the concrete cylinder that is in suction stroke (suction) is communicated with distributing valve, is in the concrete cylinder that pushes stroke (pumping) and is communicated with hopper, thereby the concrete in the pipeline is drawn back hopper.
The concrete pumping method of plugging that prevents of the present invention can directly be used in existing concrete pump, with the plugging phenomenon in the pumping procedure of releiving.The below describes each embodiment of the concrete pumping method of plugging that prevents of the present invention.
The first embodiment
Fig. 4 shows the flow chart according to the first embodiment of concrete pumping method of the present invention.In conjunction with reference to Fig. 2 to Fig. 4, this concrete pumping method comprises S202: in the process of the material such as termination of pumping, make the distributing valve of concrete pump and concrete piston back and forth movable repeatedly, the concrete in the hopper is loosened; S204: adopt the first pump displacement and the first pumping thrust to carry out concrete pumping, and utilize pressure transducer testing pump pressurization pressure; S206: judge whether the pumping pressure that detects surpasses threshold value? S208: if the pumping pressure that detects surpasses threshold value, then adopt the second pump displacement less than the first pump displacement to make first scheduled time of concrete pumping, recycling pressure transducer testing pump pressurization pressure; S210: judge whether the pumping pressure that detects surpasses threshold value? S212: if surpass threshold value, then adopt greater than the second pumping thrust of the first pumping thrust and carry out concrete pumping.
Particularly, controller is by pumping pressure sensor 117 Real-Time Monitoring pipeline pressure, and when plugging will occur, the pipeline mounted pump pressurization pressure can increase, pressure transducer 117 can be with this signal feed back to controller 119, and the difference that controller 119 is directed to the pumping state has adopted the following measure of releiving:
1, opens pump material alive: in the process of the material such as pumping system termination of pumping, allow the tilt cylinder teeter allow for 2-3 time the concrete material in the hopper loosening, control again the master cylinder piston longitudinally-moving and allow for 2-3 time the concrete material in the master cylinder loosening, when this will prevent to start because the generation of the plugging phenomenon that the concrete of gelling brings.Preferably, the value of monitoring pumping pressure sensor when pumping starts when the pumping pressure value surpasses predetermined value, opens pump material alive again.
2, pumping procedure is releived automatically: in pumping procedure, if the plugging phenomenon occurs, the value of pumping pressure sensor can increase, this moment is under the prerequisite that does not change engine output, control system reduces pump displacement, take the mode of slow-speed pumping to dredge, after pumping pressure recovers normally, recover again former pump displacement to improve rate of pumping.
3, automatic switchover pumping state: if the plugging phenomenon still is not resolved after reducing pump displacement, controller is outputted to high pressure pumping state with control so, take the mode of high pressure pumping to strengthen the thrust that acts on master cylinder, allow the plugging phenomenon be alleviated.
During the low pressure pumping, low-voltage solenoid valve 127 gets electric, and hydraulic oil is from rod chamber 112 oil-feeds of master cylinder 111; During the high pressure pumping, high-pressure solenoid valve 125 gets the electric hydraulic oil of then controlling from rodless cavity 114 oil-feeds of master cylinder 111, thereby can control changing to high pressure conditions from low-pressure state of pumping system.
In the first embodiment, detect pumping pressure when too high at pumping startup control device processed, control distributing valve and master cylinder move back and forth and dredge concrete in the concrete cylinder of living; In pumping procedure, can reduce the hydraulic fluid flow rate that enter master cylinder by control discharge of main pump Proportional valve when too high and make pumping switch at a slow speed state the plugging situation is releived when controller detects pumping pressure; When the small displacement pumping can't solve the plugging state, then control high-pressure solenoid valve and get electricly, the pumping state is switched to high pressure conditions alleviate plugging.
The second embodiment
Fig. 5 shows the flow chart according to the second embodiment of concrete pumping method of the present invention.Present embodiment and first embodiment's difference are: employing step S209 and S211 replace step S208 and S210 and the S212 among the first embodiment.Wherein, step S209: if the pumping pressure that detects greater than threshold value, then adopts less than the second pump displacement of the first pump displacement with greater than second second scheduled time of pumping thrust pumping of the first pumping thrust; Step S211: after second scheduled time, side by side or in tandem return to the first pump displacement and the first pumping thrust, be about to the first pump displacement and be increased to the first pump displacement, the second pumping thrust is reduced to the first pumping thrust.
In the present embodiment, if when the plugging phenomenon occurs, not only reduce pump displacement, improve simultaneously pumping thrust, so after pumping a period of time, side by side or in tandem reduce pump displacement and pumping thrust.
Fig. 6 shows according to the releive handling process of method of first of plugging that prevents in the concrete pumping process of the present invention, and as shown in Figure 6, originally the method for releiving may further comprise the steps: S302: in the concrete pumping process, and the examinations pumping pressure; S304: judge that the pumping pressure that detects is greater than threshold value? S306: if greater than threshold value, then reduce pump displacement; S308: after this, continue to judge whether pumping pressure surpasses threshold value? S308: if greater than threshold value, then improve pumping thrust.
Releive in the method first, real-time testing pump pressurization pressure is if find that pumping pressure is higher than threshold value, then reduce pump displacement, the testing pump pressurization pressure is normal if pumping pressure recovers again, then recover original pump displacement, otherwise improve pumping thrust, with the plugging phenomenon of releiving.
Fig. 7 shows according to the releive handling process of method of second of plugging that prevents in the concrete pumping process of the present invention, as shown in Figure 7, method and the shown in Figure 6 first method difference of releiving of originally releiving is: adopt step S307 and S309 to replace step S306, S308 and S310.Wherein, step S307: reduce simultaneously pump displacement and improve pumping thrust; S309: so, after pumping a period of time, simultaneously or recover in tandem original pump displacement and pumping thrust.
Releive in the method second, the testing pump pressurization pressure if find that pumping pressure is higher than threshold value, then reduces pump displacement and improves pumping thrust in real time, so after pumping a period of time, then recovers original pump displacement and pumping thrust, with the plugging phenomenon of releiving.
In sum, the present invention has taken into full account various operating modes and the plugging phenomenon has been carried out pretreatment, so, can effectively reduce or alleviate the plugging phenomenon.The measure of existing concrete pump pipe-blocking-proof is comparatively simple, if only automatic pump reversing is back and forth several when the pumping superpressure, does not often have actual effect.And lack the processing that plugging is expected, do not consider that the plugging that causes owing to concrete coagulation may in waiting material process.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a concrete pumping method that prevents plugging is characterized in that, may further comprise the steps:
Adopt the master cylinder of the first pump displacement, concrete pump to adopt the first pumping thrust to carry out concrete pumping main pump, and utilize pressure transducer testing pump pressurization pressure;
When the described pumping pressure that detects surpasses threshold value, adopt the second pump displacement less than described the first pump displacement to make first scheduled time of concrete pumping; And
After described first scheduled time, if the pumping pressure that detects then is increased to described the first pump displacement with described the second pump displacement in normal range (NR); If the described pumping pressure that detects not in normal range (NR), then adopts on the basis of keeping described the second pump displacement and carries out concrete pumping greater than the second pumping thrust of described the first pumping thrust.
2. concrete pumping method according to claim 1, it is characterized in that, adopt before the first pumping thrust carries out the step of concrete pumping at the described master cylinder that main pump is adopted the first pump displacement, concrete pump, also be included in the back and forth movable repeatedly step so that the concrete in the hopper is loosened of the distributing valve that makes concrete pump in the process of the material such as termination of pumping and concrete piston.
3. concrete pumping method according to claim 1 is characterized in that, described the first pumping thrust is corresponding with the rod chamber oil-feed of the master cylinder of described concrete pump, and described the second pumping thrust is corresponding with the rodless cavity oil-feed of described master cylinder.
4. a concrete pumping method that prevents plugging is characterized in that, may further comprise the steps:
Adopt the master cylinder of the first pump displacement, concrete pump to adopt the first pumping thrust to carry out concrete pumping main pump, and utilize pressure transducer testing pump pressurization pressure;
When described pumping pressure surpasses threshold value, adopt less than the second pump displacement of described the first pump displacement with greater than the second pumping thrust of the first pumping thrust and make second scheduled time of concrete pumping; And
After described second scheduled time, simultaneously or carry out in tandem following two operations: described the second pump displacement is increased to described the first pump displacement, described the second pumping thrust is reduced to described the first pumping thrust.
5. concrete pumping method according to claim 4 is characterized in that, also is included in before the pumping, makes distributing valve and the reciprocal movable repeatedly step so that the concrete in the hopper is loosened of concrete piston of concrete pump.
6. concrete pumping method according to claim 4 is characterized in that, described the first pumping thrust is corresponding with the rod chamber oil-feed of the master cylinder of described concrete pump, and described the second pumping thrust is corresponding with the rodless cavity oil-feed of described master cylinder.
7. method of releiving that in the concrete pumping process, prevents plugging, it is characterized in that, in the concrete pumping process, real-time testing pump pressurization pressure is if described pumping pressure is higher than threshold value, then reduce the pump displacement of main pump, after this, normal if described pumping pressure recovers, then recover original pump displacement, otherwise improve the pumping thrust of the master cylinder of concrete pump, with the plugging phenomenon of releiving.
8. method of releiving that in the concrete pumping process, prevents plugging, it is characterized in that, in the concrete pumping process, real-time testing pump pressurization pressure, if described pumping pressure is higher than threshold value, then reduce the pump displacement of main pump and improve the pumping thrust of the master cylinder of concrete pump, with the plugging phenomenon of releiving.
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| CN 201110161157 CN102220969B (en) | 2011-06-15 | 2011-06-15 | Concrete pumping method for preventing pipe blockage and relieving method for preventing pipe blockage |
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| CN 201110161157 CN102220969B (en) | 2011-06-15 | 2011-06-15 | Concrete pumping method for preventing pipe blockage and relieving method for preventing pipe blockage |
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| CN102220969B true CN102220969B (en) | 2013-03-20 |
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| CN102841567B (en) * | 2012-09-28 | 2015-03-18 | 三一汽车制造有限公司 | Pump truck, dredging control system and dredging control method thereof |
| CN104454483B (en) * | 2014-11-20 | 2016-04-20 | 徐州徐工施维英机械有限公司 | The controlling method of load stickiness and control system and pumping equipment |
| CN106017401B (en) * | 2016-06-13 | 2018-11-09 | 上海建工集团股份有限公司 | The monitoring device of ultra-high pump concrete conveying blockage and monitoring and evaluation method |
| CN106404274A (en) * | 2016-09-27 | 2017-02-15 | 中建三局集团有限公司 | Wireless monitoring technology based early warning system and method for high-rise floor construction pump pipe clogging |
| CN109579903B (en) * | 2018-11-16 | 2020-05-26 | 中联重科股份有限公司 | Method and device for diagnosing pipe blockage of concrete equipment |
| CN110173278A (en) * | 2019-04-29 | 2019-08-27 | 安百拓（南京）建筑矿山设备有限公司 | The pumping control method of wet-spraying machine |
| CN113565746B (en) * | 2021-07-26 | 2022-08-23 | 中联重科股份有限公司 | Method, processor, device and pumping equipment for pressure switching of pumping equipment |
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| CN114233599B (en) * | 2021-11-25 | 2023-12-12 | 徐州徐工施维英机械有限公司 | Concrete pumping machine and control method of pre-blocking prevention pipe of concrete pumping machine |
| CN114412766B (en) * | 2022-01-17 | 2024-01-23 | 三一汽车制造有限公司 | Pumping speed control method and device, pumping system and working machine |
| CN114922819B (en) * | 2022-05-23 | 2023-01-31 | 中联重科股份有限公司 | Identification method of newly transported concrete in pumping equipment and pumping control method |
| CN114909281B (en) * | 2022-06-20 | 2023-12-22 | 中联重科股份有限公司 | Method and device for determining pumpability of material and pumping control method and device |
| CN115013277B (en) * | 2022-06-20 | 2024-02-02 | 中联重科股份有限公司 | Method and device for determining pumpability of material and pumping control method and device |
| CN116816654B (en) * | 2023-07-14 | 2023-11-17 | 睢宁兴港商砼有限公司 | Intelligent control system of concrete delivery pump |
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| JPS6182075U (en) * | 1984-11-01 | 1986-05-30 | ||
| CN2334923Y (en) * | 1997-03-10 | 1999-08-25 | 许畅 | High/low pressure pumping automatic switching device for concrete delivering pump |
| CN2668888Y (en) * | 2003-11-14 | 2005-01-05 | 段会强 | Concrete pump with pipe-blocking-proof function |
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