WO2012088827A1

WO2012088827A1 - Concrete pump and method for adjusting value of drive pressure to swinging actuator thereof

Info

Publication number: WO2012088827A1
Application number: PCT/CN2011/074610
Authority: WO
Inventors: 高荣芝; 王佳茜
Original assignee: 长沙中联重工科技发展股份有限公司; 湖南中联重科专用车有限责任公司
Priority date: 2010-12-28
Filing date: 2011-05-24
Publication date: 2012-07-05
Also published as: CN102094779B; RU2013131156A; BR112013016853A2; CN102094779A; EP2660467A1; RU2557815C2; BR112013016853B1

Abstract

A concrete pump and a method for adjusting the value of the drive pressure to the swinging actuator in the concrete pump are disclosed. The concrete pump includes a swinging actuator and an S-shaped distribution valve (17). The swinging actuator is driven by a swinging hydraulic loop and controls the swinging of the S-shaped distribution valve. The swinging hydraulic loop includes a swinging drive pressure control module. The swinging drive pressure control module adjusts the value F of the swinging drive pressure that the swinging hydraulic loop applies on the swinging actuator according to the first pressure value F1 and/or the second pressure value F2, wherein the first pressure value F1 is the oil liquid pressure value of the stirring hydraulic loop, and the second pressure value F2 is the oil liquid pressure value of the concrete cylinder hydraulic loop. The concrete pump avoids conditions that different attributions of the concrete or other different working conditions cause the actuator to provide over-high or over-low pressure to the S-shaped distribution valve. The concrete pump avoids the conditions that the S-shaped distribution valve generates high-speed impact and noise and the structural body generates inertia impact and vibration.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of concrete pumps, and more particularly to a concrete pump and a method of adjusting a driving pressure value of a swing actuator in the pump. BACKGROUND OF THE INVENTION As shown in FIGS. 1 and 2, a concrete pump includes a conveying pipe A for conveying concrete to a destination and a main body portion of a concrete pump. The main part of the concrete pump includes a hopper 18 and a pair of 砼Hong (first blush 20) And a second red 21, a pair of main oil red (first main oil red 13 and second main oil red 14), an S-shaped distribution valve 17 and a pair of oscillating cylinders (first oscillating oil rainbow 11 and second oscillating oil rainbow 12) etc. Among them, red is used to pump concrete from the hopper to the conveying pipe, driven by the alternating main oil red; the S-shaped distribution valve 17 is located in the hopper 18, and is connected with the conveying pipe, and the S-shaped distribution valve 17 is alternated. Connected to one of the 砼 rainbows to distribute the concrete, at which point another sump draws concrete from the hopper. Specifically, the alternating sway of the S-shaped distribution valve is caused by one or more actuators (eg, oscillating In addition, as shown in Fig. 3, the concrete pump further includes an accumulator 7 and a constant pressure pump 5. The accumulator 7 provides a pressure shock to cause the S-shaped distribution valve to achieve sufficient acceleration when oscillating and Speed to ensure pumping action and distribution tube Coordination and sufficient flow. The actuator is mainly used to drive the gravity of the S-shaped distribution valve, the friction between the S-shaped distribution valve and other mechanical parts, the cutting force of the concrete column in the S-shaped distribution valve and the resistance of the concrete in the hopper 18. The constant pressure pump 5 is used to supply the accumulator 7 with pressurized oil, and the upper limit of the pressure of the accumulator 7 is determined by the constant pressure pump 5. When the accumulator 7 is charged to the target value, the constant pressure pump 5 is cut off, The output flow rate of the constant pressure pump 5 is automatically reduced, even 0, and the pressure in the accumulator 7 is equal to the pressure cutoff value of the constant pressure pump 5. As shown in Fig. 2, the existing mixed soil pump is The pumping work logic is: when the first main oil rainbow 13 is propelled under the control of the control system, the first swing oil rainbow 11 and the second swing oil red 12 will drive the S-shaped distribution valve to open the first main oil red 13 side. First red 20, at this time, the first main cylinder 13 pushes the concrete in the first rainbow 20 into the S-shaped distribution valve, and the second main oil rainbow 14 draws the concrete in the hopper 18 into the second cylinder 21; When the main oil rainbow moves to the predetermined position, the following conversion will be performed, and the second main oil rainbow 14 is operated in the power source and the control system. When pushing down, the swinging oil rainbow will drive the S-shaped dispensing valve to swing to open the second red 21 on the second main oil red 14 side, at which time the second main oil red 14 pushes the concrete in the second cylinder 21 into the S shape. Dispensing valve, the first main oil rainbow 13 draws in concrete in the hopper 18 The first cylinder 20; until the two master cylinders move again to the predetermined position, the system will repeat all of the above logic. In this way, the concrete pump realizes the continuous delivery of the concrete in the hopper 18 to the S-shaped distribution valve and then to the destination of the delivery pipe (shown in Figure 1). Figure 3 shows a hydraulic control circuit for realizing the above logic, wherein the first electromagnetic reversing valve 1 and the first 'j, the hydraulic diverting valve 2 are used to drive the first hydraulic diverter valve 3 to commutate, first The hydraulic directional control valve 3 is used for driving the main cylinder to be reversed; similarly, the second electromagnetic directional control valve 8 and the second small hydraulic directional control valve 9 are used to drive the second hydraulic directional control valve 10 to reverse, and the second hydraulically directional control Valve 10 is used to drive the oscillating oil red commutation. The main oil red includes a first main oil red 13 and a second main oil red 14, and the swing oil red includes a first swing oil red 11 and a second swing oil rainbow 12. The first oil pump 4 is for driving the main oil rainbow, and the second oil pump 5 is for driving the swing cylinder. The second oil pump 5 supplies hydraulic oil to the accumulator 7, and the accumulator 7 drives the swing of the first swing cylinder 11 and the second swing cylinder 12. When pumping concrete of different nature, the oil pressure supplied by the accumulator 7 to the oscillating cylinder (actuator) may be too high or too low, causing the actuator to provide too much or too little pressure to the S-shaped dispensing valve. If the concrete in the hopper is low-viscosity concrete, the excessive pressure (energy) provided by the actuator will cause high-speed impact and noise of the S-shaped distribution valve, and at the same time cause inertial impact and vibration of the entire structure, which will also cause unnecessary Energy loss; if the viscosity of the concrete in the hopper is high, the insufficient pressure provided by the actuator will cause the S-shaped distribution valve to fail to swing. Occasionally, the operator may manually adjust the oil pressure supplied by the accumulator 7 to the oscillating oil (actuator) according to a certain pumping condition, thereby adjusting the pressure provided to the S-shaped distribution valve, but even Under the same conditions of pumping the same concrete, the pressure should also be variable. SUMMARY OF THE INVENTION One technical problem to be solved by the present invention is to provide a concrete pump capable of adjusting the swing driving pressure value of the swinging hydraulic circuit to the swinging actuator according to the magnitude of the resistance of the S-shaped dispensing valve. Another technical problem to be solved by the present invention is to provide a method of adjusting the driving pressure value of the swing actuator in the concrete pump. In order to solve the above technical problem, according to one aspect of the present invention, a concrete pump is provided, comprising: a hopper in which concrete is installed; an S-shaped distribution valve located in the hopper; and an oscillating actuator connected to the S-shaped distribution valve The swing hydraulic circuit is driven to control the swing of the S-shaped distribution valve; the stirring mechanism is located in the hopper, driven by the stirring hydraulic circuit to agitate the concrete in the hopper; and the cylinder is connected to one end of the S-shaped distribution valve through the hydraulic circuit of the cylinder Driving to output concrete or sucking concrete outward, the swing hydraulic circuit includes a swing driving pressure control module; the swing driving pressure control module is according to the first The pressure value F 1 and/or the second pressure value F2 adjust the swing driving pressure value F of the swing hydraulic circuit to the swing actuator, wherein the first pressure value F1 is the oil pressure value in the stirring hydraulic circuit, and the second pressure value F2 is The value of the oil pressure in the red hydraulic circuit. Further, a stirring pressure sensor is disposed in the stirring hydraulic circuit for sensing the oil pressure in the stirring hydraulic circuit to obtain a first pressure value F1; a pumping pressure sensor is disposed in the hydraulic circuit of the cylinder for sensing The oil pressure value in the cylinder hydraulic circuit obtains the second pressure value F2. Further, the swing drive pressure value F = Fl xa + F2xb, where a is the first coefficient and b is the second coefficient. Further, the first coefficient has a value ranging from 0.3 to 1, and the second coefficient has a value ranging from 0.1 to 0.6. Further, the swing actuator is a swing cylinder; the swing hydraulic circuit includes: an accumulator whose oil outlet is connected to a rod cavity or a rodless cavity of the swing oil rainbow to provide a driving pressure to the swing oil rainbow; a constant pressure pump, The oil outlet is connected to the oil inlet of the accumulator to supply hydraulic oil to the accumulator; the driving pressure control module is a pressure reducing valve, and is disposed between the oil outlet of the constant pressure pump and the oil inlet of the accumulator. In the road, it is used to adjust the pressure of the hydraulic oil output from the constant pressure pump to the accumulator. Further, the oscillating cylinder includes a first oscillating cylinder and a second oscillating cylinder; a second hydraulic directional control valve is disposed between the accumulator and the first oscillating cylinder and the second oscillating cylinder, and the main hydraulic oil of the second hydraulic directional control valve The port is connected to the oil outlet of the accumulator, the first working port is connected to the rodless cavity of the first swinging oil rainbow, and the second working port is connected to the no-drying chamber of the second swinging cylinder. Further, the red includes a first red and a second red; the red hydraulic circuit includes: a main oil pump; a first main oil red and a second main oil red, the first main oil red and the second main oil red piston rod are respectively connected to First red and second red; the first hydraulically operated reversing valve, the main oil inlet is connected to the oil outlet of the main oil pump, the first working oil port is connected to the first main cylinder and has 4 dry chambers, and the second working oil port is connected The second main cylinder has 4 dry chambers; the pumping pressure sensor is disposed in the oil passage between the oil outlet of the main oil pump and the main oil inlet of the first hydraulic directional control valve. Further, the stirring mechanism is a stirring shaft provided with a blade; the stirring hydraulic circuit comprises: a stirring hydraulic motor, the output shaft is connected to the stirring shaft; the stirring oil pump is connected to the oil inlet of the stirring hydraulic motor; the stirring pressure sensor is set at Stir the oil passage between the oil pump's oil outlet and the oil inlet of the agitating hydraulic motor. According to another aspect of the present invention, there is provided a method of adjusting a driving pressure value of a swing actuator in a concrete pump, comprising: receiving a first pressure value F1 and/or a second pressure value F2, wherein the first pressure value F1 Is the oil pressure value in the stirring hydraulic circuit; the second pressure value F2 is the oil pressure value in the pumping hydraulic circuit; the first pressure value F1 and/or the second pressure value F2 adjusts the swing hydraulic circuit to the swing actuator Drive pressure value F. Further, adjusting the step 4 of the driving pressure value F to the swing actuator according to the first pressure value F 1 and the second pressure value F2 comprises: calculating the driving pressure value F using the formula F = Fl xa + F2xb, wherein, a For the first coefficient, b is the second coefficient, and the first coefficient and the second coefficient are measured by an engineering test. Further, the first coefficient has a value ranging from 0.3 to 1, and the second coefficient has a value ranging from 0.1 to 0.6. The present invention has the following beneficial effects: The swing hydraulic circuit of the present invention includes a swing drive pressure control module, and the swing drive pressure control module adjusts the swing hydraulic circuit pair according to the first pressure value F 1 and/or the second pressure value F2 The swing driving pressure value F of the swing actuator, wherein the first pressure value F1 is an oil pressure value in the stirring hydraulic circuit, and the second pressure value F2 is an oil pressure in the cylinder hydraulic circuit value. Since the first pressure value F1 and the second pressure value F2 can reflect the magnitude of the resistance received when the S-shaped distribution valve swings, the swing driving pressure control module adjusts according to the first pressure value F1 and the second pressure value F2 at any time. The oscillating hydraulic circuit oscillates the pressure value F to the oscillating actuator. In this way, the actuator is prevented from providing too high or too low pressure to the S-shaped distribution valve due to different properties of the concrete or other working conditions, thereby avoiding high-speed impact and noise of the S-shaped distribution valve and the entire structure. Inertia shock and vibration, or S-shaped distribution valve can not swing. In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. ^ Below with reference to FIG. ^1, the present invention will be further described in detail. The drawings are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawings: Figure 1 is a schematic view of the overall structure of a concrete pump; Figure 2 is a schematic view of a concrete pump except for a conveying pipe; Figure 3 is a schematic view of a hydraulic control circuit of a concrete pump in the prior art; Figure 4 is a schematic view showing a hydraulic control circuit of a concrete pump according to a first embodiment of the present invention; Figure 5 shows the first according to the present invention A flow chart of a method of adjusting a drive pressure value of a swing actuator in a concrete pump of an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention are described in detail below with reference to the accompanying drawings. As shown in Fig. 2, the main engine structure of the concrete pump according to the first embodiment of the present invention is the same as that of the prior art concrete pump, and includes a hopper 18, an S-shaped distribution valve 17, an oscillating actuator, a stirring mechanism, and a boring cylinder. Wherein, the hopper 18 is filled with concrete; the S-shaped distribution valve 17 is located in the hopper 18; the swing actuator is connected to the S-shaped distribution valve 17, and is driven by the swing hydraulic circuit to control the swing of the S-shaped distribution valve 17; Not shown) located in the hopper 18, driven by the agitation hydraulic circuit, agitating the concrete in the hopper 18; red is connected to one end of the S-shaped distribution valve 17, and driven by the red hydraulic circuit to input and mix into the S-shaped distribution valve 17; Doubt soil or draw from the S-shaped distribution valve 17; suspect soil. Preferably, as can be seen from Fig. 2, in the present embodiment, the swing actuator is a swing cylinder, and more preferably includes a first swing cylinder 11 and a second swing cylinder 12. As can be seen from Fig. 3, the oscillating hydraulic circuit comprises an accumulator 7 and a constant pressure pump 5, wherein the oil outlet of the accumulator 7 is connected to the rod chamber of the first oscillating cylinder 11 and the second oscillating cylinder 12 or not The rod chamber, in the present embodiment, is a rodless chamber, and provides a driving pressure to the swing cylinder; the oil outlet of the constant pressure pump 5 is connected to the oil inlet of the accumulator 7, and the hydraulic oil is supplied to the accumulator 7. Preferably, a second hydraulic directional control valve 10 is disposed between the accumulator 7 and the first oscillating cylinder 11 and the second oscillating cylinder 12, and the main oil inlet of the second hydraulic directional control valve 10 is connected to the accumulator 7 The oil outlet, the first working oil port is connected to the rodless cavity of the first swing cylinder 11 , and the second working oil port is connected to the second swing oil rainbow

12 rodless cavity. Thus, the accumulator can drive the piston rod of the first swing cylinder 11 to extend, while the piston rod of the second swing cylinder 12 is retracted, or the piston rod of the first swing cylinder 11 is retracted, and the second swinging oil rainbow 12 The piston is extended to drive the S-shaped dispensing valve 17 to swing. In addition, preferably, as shown in FIG. 2 and FIG. 4, the stone red includes the first stone with the red 20 and the second stone with the red 21; the red hydraulic circuit further includes the main oil pump 4, the first main oil red 13 and a second main oil red 14 and a first hydraulic directional control valve 3. Wherein, the piston rods of the first main oil red 13 and the second main oil red 14 are respectively connected to the first a red 20 and a second red 21; the main oil inlet of the first hydraulic directional control valve 3 is connected to the oil outlet of the main oil pump 4, and the first working oil port is connected to the first main oil rainbow 13 with a ^2 empty, second The working oil port is connected to the rod chamber of the second main oil red 14, so that the main oil pump 4 can drive the piston rods of the first main oil red 13 and the second main oil red 14 to move in opposite directions, thereby driving the first red 20 The concrete is output outward, the second red 21 draws the concrete, or drives the first cylinder 20 to absorb the concrete, and the second cylinder 21 outputs the concrete outward. As shown in FIG. 4, in the present embodiment, the first electromagnetic directional control valve 1 and the first, j, hydraulic directional control valve 2 are used to drive the first hydraulic directional control valve 3 to reverse; the same reason, the second The electromagnetic reversing valve 8 and the second small hydraulic reversing valve 9 are used to drive the second hydraulic reversing valve 10 to reverse. In the present embodiment, the agitation mechanism described above is a stirring shaft provided with blades; and the agitation hydraulic circuit described above includes a stirring hydraulic motor 31 and a stirring oil pump 30. The output shaft of the agitating hydraulic motor 31 is connected to the agitating shaft; the oil outlet of the agitating oil pump 30 is connected to the oil inlet of the agitating hydraulic motor 31. In this way, the stirring shaft of the stirring mechanism can be driven to rotate, and the stirring shaft drives the blades on the rotation to play the role of agitating the concrete. In this embodiment, the swing hydraulic circuit includes a swing drive pressure control module; the swing drive pressure control module adjusts the swing drive pressure value F of the swing hydraulic circuit to the swing actuator according to the first pressure value F1 and the second pressure value F2, Alternatively, the swing driving pressure value F of the swing hydraulic circuit to the swing actuator is adjusted according to one of the first pressure value F1 and the second pressure value F2. The first pressure value F1 is the oil pressure value in the hydraulic circuit, and the second pressure value F2 is the oil pressure value in the red hydraulic circuit. It can be understood that, since the first pressure value F1 and the second pressure value F2 can reflect the magnitude of the resistance received when the S-shaped dispensing valve swings, the swing driving pressure control module can be based on the first pressure value F1 and the second pressure. The value F2 is used to adjust the swing driving pressure value F of the swinging hydraulic circuit to the swinging actuator at any time so as to maintain an appropriate size at any time corresponding to the condition of the concrete. In this way, the actuator is prevented from providing excessive or excessive pressure to the S-shaped distribution valve 17 due to different properties of the concrete or other working conditions, thereby preventing the S-shaped distribution valve 17 from generating high-speed impact and noise and the entire structure. The body generates inertial impact and vibration, or the S-shaped distribution valve 17 cannot swing. Preferably, as shown in FIG. 4, in the embodiment, the driving pressure control module is a pressure reducing valve 19, and is disposed between the oil outlet of the constant pressure pump 5 and the oil inlet of the accumulator 7. The pressure of the hydraulic oil output from the constant pressure pump 5 to the accumulator 7 is adjusted. The working principle of the constant pressure pump and accumulator is as follows: The constant pressure pump is used to supply the accumulator with pressure oil. The upper limit of the accumulator pressure is determined by the constant pressure pump. When the accumulator pressure is charged to the target value (called the constant pressure pump pressure cutoff value), the output flow of the constant pressure pump is automatically reduced, even 0. At this time, the pressure in the accumulator is equal to the pressure cutoff value of the constant pressure pump. It can be understood that the pressure of the hydraulic oil output from the constant pressure pump 5 to the accumulator 7 is adjusted by the pressure reducing valve 19, so that the accumulator 7 can be adjusted to the swing actuator (the first swing cylinder 11 and the second in this embodiment). The driving pressure of the oscillating oil rainbow 12) is adjusted to further adjust the driving force of the first oscillating oil rainbow 11 and the second oscillating oil rainbow 12 to the S-shaped distribution valve. Of course, the pressure reducing valve 19 is only an implementation method for adjusting the pressure of the hydraulic oil output from the constant pressure pump 5 to the accumulator 7. In practice, other various adjustment methods may be used, for example, a constant pressure may be used. The oil pump pressure cutoff value adjustment mechanism provided in the pump is adjusted. More preferably, as shown in FIG. 4, in the embodiment, the stirring hydraulic circuit is provided with a stirring pressure sensor S1 for sensing the oil pressure in the stirring hydraulic circuit to obtain the first pressure value F1; The red hydraulic circuit is provided with a pumping pressure sensor S2 for sensing the oil pressure value in the red hydraulic circuit to obtain the second pressure value F2. Specifically, it can be seen from the figure that the agitation pressure sensor S 1 is disposed in the oil passage between the oil outlet of the agitating oil pump 30 and the oil inlet of the agitating hydraulic motor 31; the pumping pressure sensor S2 is disposed in the main oil pump The oil outlet between the oil outlet of 4 and the main oil inlet of the second hydraulic directional control valve 3 is in the oil passage. In addition, preferably, the swing driving pressure value F can be calculated by the following formula: F = Fl xa

+ F2xb, where a is the first coefficient and b is the second coefficient. Both a and b are derived from engineering tests. More preferably, the first coefficient has a value ranging from 0.3 to 1, and the second coefficient has a value ranging from 0.1 to 0.6. According to another aspect of the present invention, there is also provided a method of adjusting a driving pressure value of a swinging hydraulic circuit driven by a swinging actuator in a concrete pump. As shown in FIG. 5, the method comprises the following steps: S101: receiving the first a pressure value F1 and/or a second pressure value F2, wherein the first pressure value F1 is an oil pressure value in the agitation hydraulic circuit; the second pressure value F2 is a hydraulic pressure value in the pumping hydraulic circuit;

S102: The first pressure value F1 and/or the second pressure value F2 adjust the driving pressure value F of the swing hydraulic circuit to the swing actuator. Wherein, step S102 comprises: calculating a driving pressure value F using a formula F = Fl xa + F2xb, wherein a is a first coefficient, b is a second coefficient, and the first coefficient and the second coefficient are measured by engineering test-risk. More preferably, the first coefficient has a value ranging from 0.3 to 1, and the second coefficient has a value ranging from 0.1 to 0.6. The method adjusts the swing drive pressure value F of the swing hydraulic circuit to the swing actuator at any time according to the first pressure value F1 and the second pressure value F2 so as to maintain an appropriate size at any time corresponding to the condition of the concrete. In this way, the actuator pair S is avoided due to the different properties of the concrete or other working conditions. The shape distribution valve 17 provides a pressure that is too high or too low, thereby preventing the S-shaped distribution valve 17 from generating high-speed impact and noise, and generating inertial impact and vibration of the entire structure, or the S-shaped distribution valve 17 cannot swing. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claims A concrete pump, including:

Hopper (18), which is filled with concrete;

An S-shaped distribution valve (17) located in the hopper (18);

a swing actuator connected to the S-shaped distribution valve (17) and driven by the swing hydraulic circuit to control the swing of the S-shaped distribution valve (17);

a stirring mechanism, located in the hopper (18), driven by a stirring hydraulic circuit, agitating the concrete in the hopper (18); and the stone is red, connected to one end of the S-shaped dispensing valve (17), passing the red The hydraulic circuit is driven to output to the outside; the soil or the suction is mixed;

It is characterized in that

The swing hydraulic circuit includes a swing driving pressure control module;

The swing driving pressure control module adjusts the swing driving pressure value F of the swing hydraulic circuit to the swing actuator according to the first pressure value F1 and/or the second pressure value F2, wherein the first pressure value F1 is The hydraulic pressure value in the agitating hydraulic circuit is the hydraulic pressure value in the red hydraulic circuit. A concrete pump according to claim 1, wherein

The stirring hydraulic circuit is provided with a stirring pressure sensor (S1) for sensing the oil pressure in the stirring hydraulic circuit to obtain the first pressure value F1;

The cylinder hydraulic circuit is provided with a pumping pressure sensor (S2) for sensing the oil pressure value in the cylinder hydraulic circuit to obtain the second pressure value F2. The concrete pump according to claim 2, wherein said swing driving pressure value F = Flxa + F2xb, wherein a is a first coefficient and b is a second coefficient. The concrete pump according to claim 3, wherein the first coefficient has a value ranging from 0.3 to 1, and the second coefficient has a value ranging from 0.1 to 0.6. A concrete pump according to claim 1, wherein

The swing actuator is a swing cylinder; The swing hydraulic circuit includes:

An accumulator (7) having an oil outlet connected to a rod cavity or a rodless cavity of the swing cylinder to provide a driving pressure to the swing cylinder;

a constant pressure pump (5) having an oil outlet connected to an oil inlet of the accumulator (7) to supply hydraulic oil to the accumulator (7);

The driving pressure control module is a pressure reducing valve (19) disposed in an oil passage between an oil outlet of the constant pressure pump (5) and an oil inlet of the accumulator (7), The pressure of the hydraulic oil output from the constant pressure pump (5) to the accumulator (7) is adjusted. A concrete pump according to claim 5, characterized in that

The swing cylinder includes a first swing cylinder (11) and a second swing oil rainbow (12); between the accumulator (7) and the first swing cylinder (11) and the second swing cylinder (12) a second hydraulic directional control valve (10) is provided, the main oil inlet of the second hydraulic directional control valve (10) is connected to the oil outlet of the accumulator (7), and the first working oil port is connected to the The rodless chamber of the first swing cylinder (11), the second working port is connected to the rodless chamber of the second swinging oil rainbow (12). The concrete pump according to claim 6, wherein

The cylinder includes a first cylinder (20) and a second cylinder (21);

The red hydraulic circuit includes:

Main oil pump (4);

a first main oil rainbow (13) and a second main oil rainbow (14), the piston rods of the first main oil rainbow (13) and the second main oil rainbow (14) are respectively connected to the first crucible ( 20) and the second cylinder (21);

a first hydraulic directional control valve (3) having a main oil inlet connected to an oil outlet of the main oil pump (4), and a first working oil port connected to a rod chamber of the first main oil rainbow (13), a working port connecting the rod chamber of the second main oil rainbow (14);

The pumping pressure sensor (S2) is disposed in an oil passage between an oil outlet of the main oil pump (4) and a main oil inlet of the first hydraulic directional control valve (3). A concrete pump according to claim 1, wherein

The stirring mechanism is a stirring shaft provided with blades;

The agitation hydraulic circuit includes: Agitating the hydraulic motor (31), the output shaft of which is coupled to the agitating shaft;

a stirring oil pump (30), the oil outlet is connected to the oil inlet of the stirring hydraulic motor (31); the stirring pressure sensor (S1) is disposed at the oil outlet of the stirring oil pump (30) and the stirring The oil circuit between the oil inlets of the hydraulic motor (31).

9. A method of adjusting a driving pressure value of a swinging actuator in a concrete pump, comprising:

Receiving a first pressure value F1 and/or a second pressure value F2, wherein the first pressure value F1 is an oil pressure value in the agitation hydraulic circuit; the second pressure value F2 is an oil pressure in the pumping hydraulic circuit Force value

The drive pressure value F of the swing hydraulic circuit to the swing actuator is adjusted according to the first pressure value F 1 and/or the second pressure value F2.

The method of claim 9, wherein the step of adjusting the driving pressure value F to the swing actuator according to the first pressure value F1 and the second pressure value F2 comprises:

Calculating the driving pressure value F using the formula F = Fl xa + F2xb,

Where a is a first coefficient and b is a second coefficient, and the first coefficient and the second coefficient are measured by an engineering test.

The method according to claim 10, wherein the first coefficient has a value ranging from 0.3 to 1, and the second coefficient has a value ranging from 0.1 to 0.6.