CN114687980B - Pumping equipment, pumping system and reversing parameter adjusting method thereof - Google Patents
Pumping equipment, pumping system and reversing parameter adjusting method thereof Download PDFInfo
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- CN114687980B CN114687980B CN202011593842.4A CN202011593842A CN114687980B CN 114687980 B CN114687980 B CN 114687980B CN 202011593842 A CN202011593842 A CN 202011593842A CN 114687980 B CN114687980 B CN 114687980B
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- pumping
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- oil cylinder
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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
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/34—Control not provided for in groups F04B1/02, F04B1/03, F04B1/06 or F04B1/26
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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
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/02—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having two cylinders
Abstract
The application provides pumping equipment, a pumping system and a reversing parameter adjusting method thereof, wherein the pumping system comprises a hydraulic driving unit, a control unit, an induction sensor and a pumping oil cylinder; the induction sensor is arranged at a reversing position corresponding to the piston of the pumping oil cylinder at one end of the pumping oil cylinder; the rear end of a piston rod of the pumping oil cylinder is connected with a piston, a first induction zone and a second induction zone are arranged at one side, close to the induction sensor, of the rear end of the piston rod, and the first induction zone and the second induction zone are arranged at intervals along the axial direction of the piston rod; the hydraulic driving unit is communicated with the pumping oil cylinder, and the control unit is electrically connected with the hydraulic driving unit and the induction sensor. The interval area and the two sensing areas are formed on the piston rod, and the control unit can adjust the reversing buffer time of the next reversing period based on the number of trigger signals received in the current reversing period, so that the stroke deviation of the oil cylinder is automatically corrected, and the problem that the pumping oil cylinder is subjected to premature reversing or too late reversing is solved.
Description
Technical Field
The application relates to the technical field of material pumping, in particular to pumping equipment, a pumping system and a reversing parameter adjusting method thereof.
Background
Pumping equipment (such as pump truck, drag pump, vehicle-mounted pump, fire engine, etc.) is a mechanical device for pressurizing fluid (or slurry) material and then conveying the fluid (or slurry) material to a preset position, and has the advantages of high operation efficiency, convenient movement, etc., and has been widely applied to engineering construction. The pumping equipment mainly comprises a tilt cylinder, a hydraulic pump, a reversing valve, two main oil cylinders and the like, and continuous pumping of the pumping equipment is realized through cooperation of the tilt cylinder and the two main oil cylinders. During pumping, the reversing of the master cylinder is usually required to be accurately controlled, and the reversing parameters of the existing pumping equipment are fixed, so that when the load of the equipment changes, the fixed reversing parameters can cause the problem of early reversing or too late reversing of the master cylinder. If the reversing is performed too early, the stroke of the main oil cylinder is short, the stroke of the main oil cylinder is not fully utilized, so that the displacement of the pumping system is reduced, the working efficiency is not improved, more reversing is needed for completing the pumping of the materials with the same volume, and the service life of the pumping system is reduced; if the reversing is too late, the master cylinder will collide (i.e. the piston hits the cylinder), causing mechanical losses and hydraulic shocks, and also reducing the service life of the pumping system.
Disclosure of Invention
The application provides pumping equipment, a pumping system and a reversing parameter adjusting method thereof, which are used for solving the problem that the reversing parameter of the existing pumping equipment is fixed, so that the main oil cylinder is subjected to premature reversing or too late reversing.
The application provides a pumping system which comprises a hydraulic driving unit, a control unit, an induction sensor and a pumping oil cylinder, wherein the hydraulic driving unit is connected with the control unit;
the induction sensor is arranged at a reversing position corresponding to the piston of the pumping oil cylinder at one end of the pumping oil cylinder;
the rear end of a piston rod of the pumping oil cylinder is connected with the piston, a first induction zone and a second induction zone are arranged at one side, close to the induction sensor, of the rear end of the piston rod, the first induction zone and the second induction zone are used for triggering the induction sensor to generate a trigger signal, and the first induction zone and the second induction zone are arranged at intervals along the axial direction of the piston rod so as to form an interval zone between the first induction zone and the second induction zone;
the inductive sensor is opposite to the spacing area under the condition that the piston moves to a reversing position at one end of the pumping oil cylinder;
the hydraulic driving unit is communicated with the pumping oil cylinder, and the control unit is electrically connected with the hydraulic driving unit and the induction sensor.
According to the pumping system provided by the embodiment of the application, the pumping oil cylinder comprises a first pumping oil cylinder and a second pumping oil cylinder which are arranged in a linkage way, and the induction sensor comprises a first induction sensor which is arranged corresponding to the first pumping oil cylinder and a second induction sensor which is arranged corresponding to the second pumping oil cylinder; or alternatively
The induction sensor comprises a first induction sensor and a second induction sensor, wherein the first induction sensor is arranged at a reversing position corresponding to the piston of the pumping oil cylinder at the front end of the pumping oil cylinder, and the second induction sensor is arranged at a reversing position corresponding to the piston of the pumping oil cylinder at the rear end of the pumping oil cylinder.
According to a pumping system of one embodiment of the present application, the rodless cavity of the first pumping cylinder communicates with the rodless cavity of the second pumping cylinder; the rod cavity of the first pumping oil cylinder and the rod cavity of the second pumping oil cylinder are communicated with the hydraulic driving unit; or alternatively, the process may be performed,
the rod cavity of the first pumping oil cylinder is communicated with the rod cavity of the second pumping oil cylinder; the rodless cavity of the first pumping oil cylinder and the rodless cavity of the second pumping oil cylinder are communicated with the hydraulic driving unit.
According to the pumping system of one embodiment of the application, the induction sensor is arranged at the front end of the pumping cylinder.
According to the pumping system provided by one embodiment of the application, the induction sensor is a proximity switch arranged on the pumping oil cylinder;
and a first protruding part and a second protruding part are arranged at one side of the rear end of the piston rod, which is close to the proximity switch, so as to respectively form the first sensing area and the second sensing area.
According to the pumping system provided by the embodiment of the application, the rear end of the piston rod is externally sleeved with an annular sensing block;
the sensing block is provided with a groove to form the spacing region, and a front wall and a rear wall of the groove respectively form the first sensing region and the second sensing region.
According to one embodiment of the pumping system of the present application, the hydraulic drive unit comprises a reversing valve and an overflow valve;
the reversing valve is communicated with the pumping oil cylinder, an oil inlet of the reversing valve is communicated with the overflow valve through an oil inlet pipeline, and a pressure sensor is arranged on the oil inlet pipeline and used for generating an oil inlet pressure signal of the reversing valve;
the control unit is electrically connected with the reversing valve, the overflow valve and the pressure sensor.
The application also provides a pumping device comprising a pumping system as described above.
The application also provides a reversing parameter adjusting method of the pumping system, which comprises the following steps:
determining the number of trigger signals received in the current commutation period;
and adjusting the commutation buffer time of the next commutation period based on the number of the trigger signals received in the current commutation period.
According to an embodiment of the present application, the method for adjusting a commutation parameter of a pumping system, based on the number of trigger signals received in the current commutation period, adjusts a commutation buffer time of a next commutation period, includes:
if the number of the received trigger signals in the current reversing period is N1, determining the reversing buffer time of the next reversing period to be T1;
if the number of the received trigger signals in the current reversing period is N2, determining the reversing buffer time of the next reversing period to be T2;
if the number of the received trigger signals in the current reversing period is N3, determining the reversing buffer time of the next reversing period to be T3;
wherein N1, N2 and N3 are positive integers, and N1 is less than N2 and less than N3.
According to an embodiment of the present application, the method for adjusting a commutation parameter of a pumping system, before adjusting a commutation buffer time of a next commutation period based on the number of trigger signals received in the current commutation period, further includes:
acquiring an oil inlet pressure signal of the current reversing period;
determining the type of pressure impact of the current reversing period based on the oil inlet pressure signal of the current reversing period, wherein the pressure impact comprises a cylinder collision impact and a valve core median impact;
and if the pressure impact of the current reversing period is determined to be the neutral impact of the valve core, increasing the power-off buffering time of the overflow valve of the next reversing period.
According to an embodiment of the present application, in the method for adjusting a commutation parameter of a pumping system, if the number of received trigger signals in the current commutation period is N3, determining the commutation buffer time of the next commutation period is T3 includes:
and under the condition that the pressure impact of the current reversing period is determined to be the cylinder collision impact, if the pressure value of the oil inlet of the current reversing period is larger than a pressure threshold value and the number of the received trigger signals in the current reversing period is N3, determining the reversing buffer time of the next reversing period to be T3.
According to the pumping equipment, the pumping system and the pumping method, the interval area and the two sensing areas are formed on the piston rod, and the control unit can adjust the reversing buffer time of the next reversing period based on the number of the trigger signals received in the current reversing period, so that the stroke deviation of the oil cylinder is automatically corrected, and the problem that the pumping oil cylinder is subjected to premature reversing or too late reversing is solved.
Drawings
In order to more clearly illustrate the application or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the application, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a pumping system according to the present application;
fig. 2 is a schematic flow chart of a method for adjusting reversing parameters of a pumping system according to the present application.
Reference numerals:
100: a pumping system; 1: an inductive sensor; 1a: a first inductive sensor; 1b: a second inductive sensor; 2: a pumping cylinder; 2a: a first pumping cylinder; 2b: a second pumping cylinder; 21: a piston rod; 22: a first sensing region; 23: a second sensing region; 24: a spacer; 25: an induction block; 3: a water tank.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The pumping system of the present application, which can be used for pumping equipment of a pump truck, a drag pump, a vehicle-mounted pump, a fire truck, etc., is described below with reference to fig. 1, and as shown in fig. 1, the pumping system 100 includes a hydraulic driving unit (not shown in the drawing), a control unit (not shown in the drawing), an induction sensor 1, and a pumping cylinder 2.
As shown in fig. 1, the induction sensor 1 is disposed at a reversing position corresponding to a piston (not shown in the figure) of the pumping cylinder 2 at one end of the pumping cylinder 2; the rear end of a piston rod 21 of the pumping cylinder 2 is connected with a piston, a first sensing area 22 and a second sensing area 23 are arranged at one side, close to the sensing sensor 1, of the rear end of the piston rod 21, the first sensing area 22 and the second sensing area 23 are used for triggering the sensing sensor 1 to generate a trigger signal, and the first sensing area 22 and the second sensing area 23 are arranged at intervals along the axial direction of the piston rod 21 so as to form a spacing area 24 between the first sensing area 22 and the second sensing area 23; in case the piston is moved to a reversing position at one end of the pumping cylinder 2, the inductive sensor 1 is opposite to the spacer 24.
Specifically, as shown in fig. 1, the pumping cylinder 2 generally includes a cylinder body, a piston rod 21, and a piston slidably installed in the cylinder body back and forth, the rear end of the piston rod 21 being connected to the piston, the front end of the piston rod 21 passing through the water tank 3. The piston will travel back and forth between the front and rear ends of the cylinder body once during one commutation period of the pumping cylinder 2.
The sensing sensor 1 is disposed at a reversing position corresponding to the piston of the pumping cylinder 2 at one end of the pumping cylinder 2, and may be disposed at a reversing position of the sensing sensor 1 near the front end or the rear end of the pumping cylinder 2, where the first sensing area 22, the second sensing area 23 and the spacing area 24 are located at the front side or the rear side of the piston, or partially located at the front side, partially located at the rear side, and partially located at the position of the piston. For example, as shown in fig. 1, the induction sensor 1 is disposed at a reversing position corresponding to the front end of the pumping cylinder 2, and the first induction zone 22 is located at the front side of the reversing position of the piston at the front end of the pumping cylinder 2, and the first induction zone 22 is located at the front side of the second induction zone 23.
The following will describe the working principle of determining whether the stroke of the pumping cylinder 2 is normal based on the induction sensor 1 in conjunction with the structure of the pumping system 100 in fig. 1:
if only the first sensing area 22 passes the sensing sensor 1 in a reversing period of the pumping cylinder 2, i.e. the stroke of the pumping cylinder 2 is too short, i.e. the pumping cylinder 2 is reversed prematurely in the reversing period, then the sensing sensor 1 is triggered only once in one round trip of the piston (the sensing sensor 1 is triggered by the first sensing area 22 in the process of the piston running to the front end of the pumping cylinder 2), and a trigger signal is generated; if the first sensing area 22 and the interval area 24 pass through the sensing sensor 1 in one reversing period of the pumping cylinder 2, that is, the stroke of the pumping cylinder 2 is normal, the sensing sensor 1 is triggered twice in one round trip of the piston (the sensing sensor 1 is triggered by the first sensing area 22 in the process of moving the piston to the front end of the pumping cylinder 2 (the piston moves leftwards in fig. 1), and the sensing sensor 1 is triggered by the first sensing area 22 again in the process of moving the piston to the rear end of the pumping cylinder 2 (the piston moves rightwards in fig. 1), so as to generate two trigger signals; if the first sensing area 22, the spacing area 24 and the second sensing area 23 pass through the sensing sensor 1 in one reversing period of the pumping cylinder 2, that is, the stroke of the pumping cylinder 2 is too long, that is, the pumping cylinder 2 reverses too late in the reversing period, then the sensing sensor 1 is triggered three times in one round trip of the piston (the sensing sensor 1 is triggered by the first sensing area 22 and the second sensing area 23 in turn in the process of moving the piston to the front end of the pumping cylinder 2, and the sensing sensor 1 is triggered again by the first sensing area 22 in the process of moving the piston to the rear end of the pumping cylinder 2), three trigger signals are generated. In this way, the stroke deviation of the pumping cylinder 2 can be determined based on the number of trigger signals generated by the inductive sensor 1 in one commutation period, wherein the trigger signals can be rising edge signals or falling edge signals.
The hydraulic driving unit is communicated with the pumping oil cylinder 2, and the control unit is electrically connected with the hydraulic driving unit and the induction sensor 1.
Specifically, the hydraulic drive unit is used to drive the pumping cylinder 2. In the current commutation period, after the induction sensor 1 is triggered to generate a trigger signal, the trigger signal is sent to the control unit. The control unit can firstly determine the number of the trigger signals received in the current reversing period, and then control the hydraulic driving unit based on the number of the trigger signals received in the current reversing period so as to adjust the reversing buffer time of the next reversing period, thereby realizing automatic correction of the stroke deviation of the pumping cylinder 2. For example, if the commutation buffer time of the current commutation period is T, and if the control unit determines that the number of trigger signals received in the current commutation period is 1, the control unit adjusts the commutation buffer time of the next commutation period to be t+Δt1, i.e. increases the commutation buffer time; under the condition that the control unit determines that the number of the received trigger signals in the current reversing period is 2, the control unit does not adjust the reversing buffer time of the next reversing period, namely the reversing buffer time of the next reversing period is T; and under the condition that the control unit determines that the number of the received trigger signals in the current reversing period is 3, the control unit adjusts the reversing buffer time of the next reversing period to be T-delta T2, namely the reversing buffer time is reduced.
According to the pumping system 100 provided by the application, the interval area 24 and the two sensing areas are formed on the piston rod 21, and the control unit can adjust the reversing buffer time of the next reversing period based on the number of the received trigger signals in the current reversing period, so that the stroke deviation of the oil cylinder is automatically corrected, and the problem that the pumping oil cylinder 2 is subjected to premature reversing or too late reversing is avoided.
The pumping apparatus is generally provided with two pumping cylinders 2, so in the present embodiment, as shown in fig. 1, the pumping cylinders 2 include a first pumping cylinder 2a and a second pumping cylinder 2b that are disposed in linkage, and the induction sensor 1 includes a first induction sensor 1a disposed corresponding to the first pumping cylinder 2a and a second induction sensor 1b disposed corresponding to the second pumping cylinder 2 b.
Specifically, the first pumping cylinder 2a and the second pumping cylinder 2b are generally arranged in parallel, the piston rod 21 of the first pumping cylinder 2a is provided with a first sensing area 22 and a second sensing area 23, and the first sensing sensor 1a is used for judging whether the stroke of the first pumping cylinder 2a is normal or not, and can also be used for judging whether the reversing of the second pumping cylinder 2b at the rear end is normal or not. The piston rod 21 of the second pumping cylinder 2b is also provided with a first sensing area 22 and a second sensing area 23, and the second sensing sensor 1b is used for judging whether the stroke of the second pumping cylinder 2b is normal or not, and can also be used for judging whether the reversing of the first pumping cylinder 2a at the rear end is normal or not. In addition, in other embodiments of the present application, the induction sensor 1 includes a first induction sensor 1a and a second induction sensor 1b, where the first induction sensor 1a and the second induction sensor 1b are respectively located at the front end and the rear end of the same pumping cylinder 2, and are used for determining whether the pumping cylinder 2 commutates at the front end and the rear end normally.
The specific implementation manner of the linkage arrangement of the first pumping cylinder 2a and the second pumping cylinder 2b is generally set according to practical situations, for example, in the embodiment, in a low-pressure pumping state, the rodless cavity of the first pumping cylinder 2a is communicated with the rodless cavity of the second pumping cylinder 2 b; the rod cavity of the first pumping cylinder 2a and the rod cavity of the second pumping cylinder 2b are both communicated with the hydraulic driving unit. In the high-pressure pumping state, the rod cavity of the first pumping cylinder 2a is communicated with the rod cavity of the second pumping cylinder 2 b; the rodless cavity of the first pumping cylinder 2a and the rodless cavity of the second pumping cylinder 2b are both communicated with the hydraulic drive unit.
The induction sensor 1 is arranged at a reversing position corresponding to the piston of the pumping oil cylinder 2 at one end of the pumping oil cylinder 2, and the induction sensor 1 can be directly arranged on the pumping oil cylinder 2; the induction sensor 1 may not be directly mounted on the pumping cylinder 2. Alternatively, as shown in fig. 1, in the present embodiment, an induction sensor 1 is provided at the front end of a pumping cylinder 2. The inductive sensor 1 is thus less susceptible to interference.
Specifically, the first induction sensor 1a is provided at the front end of the cylinder body of the first pumping cylinder 2a, and the probe of the first induction sensor 1a faces the axis of the first pumping cylinder 2 a. The second induction sensor 1b is provided at the front end of the cylinder body of the second pumping cylinder 2b, and the probe of the second induction sensor 1b faces the axis of the second pumping cylinder 2 b.
The first sensing area 22 and the second sensing area 23 on the piston rod 21 can trigger the sensing sensor 1 to generate a trigger signal, and the specific arrangement mode of the first sensing area 22 and the second sensing area 23 is related to the selection type of the sensing sensor 1, for example, the sensing sensor 1 is a hall switch, and the first sensing area 22 and the second sensing area 23 are both magnetic areas.
Optionally, as shown in fig. 1, the induction sensor 1 is a proximity switch provided to the pumping cylinder 2; a first protrusion and a second protrusion are provided at a rear end of the piston rod 21 near one side of the proximity switch to form a first sensing area 22 and a second sensing area 23, respectively.
Specifically, the proximity switch is arranged in the radial direction of the piston rod 21, and the probe of the proximity switch faces the piston rod 21. When the proximity switch is opposite to the piston rod 21, the piston rod 21 is positioned outside the sensing range of the proximity switch, so that the proximity switch cannot be triggered; when the proximity switch is opposite to the first sensing area 22, the first sensing area 22 is located within the sensing range of the proximity switch, so that the proximity switch is triggered to generate a trigger signal; when the proximity switch is opposite to the spacing area 24, the spacing area 24 is located outside the sensing range of the proximity switch, so that the proximity switch is not triggered; when the proximity switch is opposite to the second sensing region 23, the second sensing region 23 is located within the sensing range of the proximity switch, so that the proximity switch is triggered to generate a trigger signal
Further, as shown in fig. 1, in the present embodiment, an annular sensing block 25 is sleeved outside the rear end of the piston rod 21; the sensing block 25 is provided with grooves to form the spacers 24, and front and rear walls of the grooves form the first sensing region 22 and the second sensing region 23, respectively. The first sensing region 22, the spacing region 24 and the second sensing region 23 are formed in a relatively simple manner. And, the groove is typically an annular groove.
Optionally, in this embodiment, the hydraulic drive unit includes a reversing valve and an overflow valve; the reversing valve is communicated with the pumping cylinder 2, an oil inlet of the reversing valve is communicated with the overflow valve through an oil inlet pipeline, and a pressure sensor is arranged on the oil inlet pipeline and used for generating an oil inlet pressure signal of the reversing valve; the control unit is electrically connected with the reversing valve, the overflow valve and the pressure sensor.
Specifically, the pressure sensor can detect the oil inlet pressure of the reversing valve in real time or periodically and send an oil inlet pressure signal to the control unit. When the cylinder collision impact or the valve core middle position impact occurs, the control unit distinguishes the cylinder collision impact and the valve core middle position impact based on the oil inlet pressure signal of the current reversing period. If the current reversing period generates valve core neutral position impact, the control unit can control the overflow valve to increase the power-off buffering time of the overflow valve in the next reversing period until the valve core neutral position impact is eliminated, so that the protection of the reversing valve is realized.
The application also provides pumping equipment which comprises the pumping system, and the pumping equipment can be a pump truck, a drag pump, a vehicle-mounted pump, a fire engine and the like
According to the pumping equipment provided by the application, the interval area and the two induction areas are formed on the piston rod, and the control unit can adjust the reversing buffer time of the next reversing period based on the number of the trigger signals received in the current reversing period, so that the stroke deviation of the oil cylinder is automatically corrected, and the problem that the pumping oil cylinder is subjected to premature reversing or too late reversing is solved.
The application also provides a reversing parameter adjusting method of the pumping system, which is realized based on the pumping system, as shown in fig. 2, and comprises the steps of S210 and S220.
Step S210: the number of trigger signals received in the current commutation period is determined.
Specifically, in the current commutation period, after the induction sensor is triggered to generate a trigger signal, the trigger signal is sent to the control unit. After receiving the trigger signals, the control unit can determine the number of the received trigger signals in the current commutation period.
Step S220: and adjusting the commutation buffer time of the next commutation period based on the number of trigger signals received in the current commutation period.
Specifically, if the number of trigger signals received in the current commutation period is N1, for example, N1 is 1 in the present embodiment, when the commutation buffer time of the current commutation period is T, the control unit determines that the commutation buffer time of the next commutation period is T1, for example, t1=t+Δt1 in the present embodiment; if the number of received trigger signals in the current commutation period is N2, for example, in this embodiment, N2 is 2, the control unit determines that the commutation buffer time of the next commutation period is T2, for example, in this embodiment, t2=t; if the number of received trigger signals in the current commutation period is N3, for example N3 in the present embodiment, the control unit determines that the commutation buffer time of the next commutation period is T3, for example t3=t- Δt2 in the present embodiment. Wherein N1, N2, N3 are positive integers, N1 < N2 < N3, T2 is usually the commutation buffer time of normal commutation. The control unit adaptively adjusts the reversing buffer time of the next reversing period based on the number of the received trigger signals in the current reversing period until the stroke of the pumping cylinder is normal.
Optionally, before the control unit performs step S210, the control unit further performs: acquiring an oil inlet pressure signal of a current reversing period; determining the type of pressure impact of the current reversing period based on the oil inlet pressure signal of the current reversing period; if the pressure impact of the current reversing period is determined to be the neutral impact of the valve core, the power-off buffering time of the overflow valve of the next reversing period is increased.
Specifically, the pressure impact comprises a cylinder collision impact and a valve core neutral impact, and the oil inlet pressure signal can be a pressure impact oscillogram and the like. The pressure sensor can detect the oil inlet pressure of the reversing valve in real time or periodically and send an oil inlet pressure signal to the control unit. When the cylinder collision impact or the valve core middle position impact occurs, the control unit distinguishes the cylinder collision impact and the valve core middle position impact based on the oil inlet pressure signal of the current reversing period. If the current reversing period generates valve core neutral position impact, the control unit can control the overflow valve to increase the power-off buffering time of the overflow valve in the next reversing period until the valve core neutral position impact is eliminated, so that the protection of the reversing valve is realized.
Optionally, under the condition that the pressure impact of the current reversing period is determined to be the cylinder collision impact, if the pressure value of the oil inlet of the current reversing period is greater than the pressure threshold value and the number of the received trigger signals in the current reversing period is 3, determining the reversing buffer time of the next reversing period to be T3.
Specifically, under the condition that the control unit determines that the pressure impact of the current reversing period is the cylinder collision impact, the control unit can determine whether the stroke of the pumping cylinder in the current reversing period is overlong or not based on the oil inlet pressure value of the current reversing period and the number of trigger signals received in the current reversing period at the same time, so that the determination result can be more accurate.
According to the reversing parameter adjusting method of the pumping system, the interval area and the two sensing areas are formed on the piston rod, and the control unit can adjust the reversing buffering time of the next reversing period based on the number of the trigger signals received in the current reversing period, so that the stroke deviation of the oil cylinder is automatically corrected, and the problem that the pumping oil cylinder is subjected to premature reversing or too late reversing is solved.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims (11)
1. The pumping system is characterized by comprising a hydraulic driving unit, a control unit, an induction sensor and a pumping oil cylinder;
the induction sensor is arranged at a reversing position corresponding to the piston of the pumping oil cylinder at one end of the pumping oil cylinder;
the rear end of a piston rod of the pumping oil cylinder is connected with the piston, a first induction zone and a second induction zone are arranged at one side, close to the induction sensor, of the rear end of the piston rod, the first induction zone and the second induction zone are used for triggering the induction sensor to generate a trigger signal, and the first induction zone and the second induction zone are arranged at intervals along the axial direction of the piston rod so as to form an interval zone between the first induction zone and the second induction zone;
the inductive sensor is opposite to the spacing area under the condition that the piston moves to a reversing position at one end of the pumping oil cylinder;
the hydraulic driving unit is communicated with the pumping oil cylinder, and the control unit is electrically connected with the hydraulic driving unit and the induction sensor; in the current commutation period, the induction sensor is used for being triggered to generate a trigger signal, and the trigger signal is sent to the control unit; the control unit can determine the number of the trigger signals received in the current reversing period, and then control the hydraulic driving unit based on the number of the trigger signals received in the current reversing period so as to adjust the reversing buffer time of the next reversing period; so as to automatically correct the stroke deviation of the pumping cylinder.
2. The pumping system of claim 1, wherein the pumping cylinder comprises a first pumping cylinder and a second pumping cylinder arranged in a linkage manner, and the sensing sensor comprises a first sensing sensor arranged corresponding to the first pumping cylinder and a second sensing sensor arranged corresponding to the second pumping cylinder; or alternatively
The induction sensor comprises a first induction sensor and a second induction sensor, wherein the first induction sensor is arranged at a reversing position corresponding to the piston of the pumping oil cylinder at the front end of the pumping oil cylinder, and the second induction sensor is arranged at a reversing position corresponding to the piston of the pumping oil cylinder at the rear end of the pumping oil cylinder.
3. The pumping system of claim 2, wherein the rodless cavity of the first pumping cylinder communicates with the rodless cavity of the second pumping cylinder; the rod cavity of the first pumping oil cylinder and the rod cavity of the second pumping oil cylinder are communicated with the hydraulic driving unit; or alternatively, the process may be performed,
the rod cavity of the first pumping oil cylinder is communicated with the rod cavity of the second pumping oil cylinder; the rodless cavity of the first pumping oil cylinder and the rodless cavity of the second pumping oil cylinder are communicated with the hydraulic driving unit.
4. The pumping system of claim 1, wherein the inductive sensor is disposed at a front end of the pumping cylinder.
5. The pumping system of claim 1, wherein the inductive sensor is a proximity switch disposed on the pumping cylinder;
and a first protruding part and a second protruding part are arranged at one side of the rear end of the piston rod, which is close to the proximity switch, so as to respectively form the first sensing area and the second sensing area.
6. The pumping system of claim 5, wherein the rear end of the piston rod is externally sleeved with an annular sensing block;
the sensing block is provided with a groove to form the spacing region, and a front wall and a rear wall of the groove respectively form the first sensing region and the second sensing region.
7. The pumping system of claim 1, wherein the hydraulic drive unit comprises a reversing valve and a relief valve;
the reversing valve is communicated with the pumping oil cylinder, an oil inlet of the reversing valve is communicated with the overflow valve through an oil inlet pipeline, and a pressure sensor is arranged on the oil inlet pipeline and used for generating an oil inlet pressure signal of the reversing valve;
the control unit is electrically connected with the reversing valve, the overflow valve and the pressure sensor.
8. A pumping device comprising a pumping system according to any of claims 1-7.
9. A method of adjusting a commutation parameter of a pumping system, comprising:
determining the number of trigger signals received in the current commutation period;
based on the number of the received trigger signals in the current reversing period, adjusting reversing buffer time of the next reversing period; the control unit can determine the number of the trigger signals received in the current reversing period after receiving the trigger signals;
if the number of the received trigger signals in the current reversing period is N1, determining the reversing buffer time of the next reversing period to be T1;
if the number of the received trigger signals in the current reversing period is N2, determining the reversing buffer time of the next reversing period to be T2;
if the number of the received trigger signals in the current reversing period is N3, determining the reversing buffer time of the next reversing period to be T3;
wherein N1, N2 and N3 are positive integers, and N1 is less than N2 and less than N3.
10. The method for adjusting a commutation parameter of a pumping system of claim 9, wherein before adjusting the commutation buffer time of the next commutation period based on the number of received trigger signals in the current commutation period, further comprises:
acquiring an oil inlet pressure signal of the current reversing period;
determining the type of pressure impact of the current reversing period based on the oil inlet pressure signal of the current reversing period, wherein the pressure impact comprises a cylinder collision impact and a valve core median impact;
and if the pressure impact of the current reversing period is determined to be the neutral impact of the valve core, increasing the power-off buffering time of the overflow valve of the next reversing period.
11. The method for adjusting a commutation parameter of a pumping system according to claim 10, wherein determining the commutation buffer time of the next commutation period to be T3 if the number of received trigger signals in the current commutation period is N3 comprises:
and under the condition that the pressure impact of the current reversing period is determined to be the cylinder collision impact, if the pressure value of the oil inlet of the current reversing period is larger than a pressure threshold value and the number of the received trigger signals in the current reversing period is N3, determining the reversing buffer time of the next reversing period to be T3.
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Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59115479A (en) * | 1982-12-21 | 1984-07-03 | Mitsubishi Heavy Ind Ltd | Control device for concrete pressure-feed pump |
| EP0798502A1 (en) * | 1996-03-30 | 1997-10-01 | Robert Bosch Gmbh | Position or displacement sensor |
| CN101749301A (en) * | 2008-12-18 | 2010-06-23 | 中集车辆（集团）有限公司 | Hydraulic cylinder device and hydraulic cylinder behavior control system with same |
| CN102536787A (en) * | 2012-01-11 | 2012-07-04 | 三一重工股份有限公司 | Pumping mechanism and material pumping equipment comprising same |
| CN202746321U (en) * | 2012-09-11 | 2013-02-20 | 中联重科股份有限公司 | Cylinder assembly and concrete pumping equipment |
| CN103140678A (en) * | 2010-08-03 | 2013-06-05 | 西法股份公司 | Pumping unit for a machine to distribute concrete |
| CN103148062A (en) * | 2013-03-19 | 2013-06-12 | 中联重科股份有限公司 | Stroke control system, method and device of cylinders in series |
| CN103343741A (en) * | 2013-07-10 | 2013-10-09 | 中联重科股份有限公司 | Double-cylinder pumping device hydraulic oil displacement control method, double-cylinder pumping device and equipment |
| CN103410695A (en) * | 2012-06-08 | 2013-11-27 | 北汽福田汽车股份有限公司 | Pumping mechanism and pump truck provided with same |
| CN103470573A (en) * | 2013-09-04 | 2013-12-25 | 中联重科股份有限公司 | Oil supply and drainage control equipment, system and method for pumping units and engineering machine |
| CN203430755U (en) * | 2013-08-22 | 2014-02-12 | 徐州徐工施维英机械有限公司 | Concrete pump reversing system |
| CN103573727A (en) * | 2013-11-07 | 2014-02-12 | 中联重科股份有限公司 | Series oil cylinder reversing control method and device and concrete pumping system |
| CN203614343U (en) * | 2013-11-28 | 2014-05-28 | 北汽福田汽车股份有限公司 | Pumping machine |
| CN104196692A (en) * | 2014-07-15 | 2014-12-10 | 三一汽车制造有限公司 | Pumping equipment, pumping system and reversing control device and method of pumping system |
| CN105715622A (en) * | 2016-04-25 | 2016-06-29 | 北汽福田汽车股份有限公司 | Engineering machinery and pumping system thereof |
| CN105971862A (en) * | 2016-05-24 | 2016-09-28 | 北汽福田汽车股份有限公司 | Pumping system reversing control method and device |
| CN111050928A (en) * | 2017-09-07 | 2020-04-21 | 瓦格纳喷涂技术有限公司 | Piston limit sensing for fluid applications |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10036202A1 (en) * | 2000-07-24 | 2002-02-07 | Putzmeister Ag | Slurry pump |
| DE102004015416A1 (en) * | 2004-03-26 | 2005-10-13 | Putzmeister Ag | Apparatus and method for controlling a slurry pump |
-
2020
- 2020-12-29 CN CN202011593842.4A patent/CN114687980B/en active Active
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59115479A (en) * | 1982-12-21 | 1984-07-03 | Mitsubishi Heavy Ind Ltd | Control device for concrete pressure-feed pump |
| EP0798502A1 (en) * | 1996-03-30 | 1997-10-01 | Robert Bosch Gmbh | Position or displacement sensor |
| CN101749301A (en) * | 2008-12-18 | 2010-06-23 | 中集车辆（集团）有限公司 | Hydraulic cylinder device and hydraulic cylinder behavior control system with same |
| CN103140678A (en) * | 2010-08-03 | 2013-06-05 | 西法股份公司 | Pumping unit for a machine to distribute concrete |
| CN102536787A (en) * | 2012-01-11 | 2012-07-04 | 三一重工股份有限公司 | Pumping mechanism and material pumping equipment comprising same |
| CN103410695A (en) * | 2012-06-08 | 2013-11-27 | 北汽福田汽车股份有限公司 | Pumping mechanism and pump truck provided with same |
| CN202746321U (en) * | 2012-09-11 | 2013-02-20 | 中联重科股份有限公司 | Cylinder assembly and concrete pumping equipment |
| CN103148062A (en) * | 2013-03-19 | 2013-06-12 | 中联重科股份有限公司 | Stroke control system, method and device of cylinders in series |
| CN103343741A (en) * | 2013-07-10 | 2013-10-09 | 中联重科股份有限公司 | Double-cylinder pumping device hydraulic oil displacement control method, double-cylinder pumping device and equipment |
| CN203430755U (en) * | 2013-08-22 | 2014-02-12 | 徐州徐工施维英机械有限公司 | Concrete pump reversing system |
| CN103470573A (en) * | 2013-09-04 | 2013-12-25 | 中联重科股份有限公司 | Oil supply and drainage control equipment, system and method for pumping units and engineering machine |
| CN103573727A (en) * | 2013-11-07 | 2014-02-12 | 中联重科股份有限公司 | Series oil cylinder reversing control method and device and concrete pumping system |
| CN203614343U (en) * | 2013-11-28 | 2014-05-28 | 北汽福田汽车股份有限公司 | Pumping machine |
| CN104196692A (en) * | 2014-07-15 | 2014-12-10 | 三一汽车制造有限公司 | Pumping equipment, pumping system and reversing control device and method of pumping system |
| CN105715622A (en) * | 2016-04-25 | 2016-06-29 | 北汽福田汽车股份有限公司 | Engineering machinery and pumping system thereof |
| CN105971862A (en) * | 2016-05-24 | 2016-09-28 | 北汽福田汽车股份有限公司 | Pumping system reversing control method and device |
| CN111050928A (en) * | 2017-09-07 | 2020-04-21 | 瓦格纳喷涂技术有限公司 | Piston limit sensing for fluid applications |
Non-Patent Citations (1)
| Title |
|---|
| 王勇,郭蓉,黄康.液压激振试验台***设计研究.机械与电子.2004,(05),26-28. * |
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