Single-main-pump pumping hydraulic system and concrete pumping apparatus

Abstract

The application belongs to the field of engineering machinery, and discloses a single-main-pump pumping hydraulic system and a concrete pumping device. The single-main-pump pumping hydraulic system comprises a main pumping hydraulic circuit, a distribution hydraulic circuit, a main oil pump and a controller. The main oil pump is connected with the first pumping oil path between the pumping electromagnetic reversing valve. The main oil pump is connected with the second pumping oil path between the distribution electromagnetic reversing valve. The first and second pumping oil paths are in parallel. The controller is used for switching control of the pumping electromagnetic reversing valve and the distribution electromagnetic reversing valve to make the distribution oil cylinder and the pumping oil cylinder act alternately in the pumping process. In the application, two hydraulic circuits share one main oil pump. In the case of constant engine power, the main oil pump can obtain greater input power. Since one distribution oil pump is cancelled, the overall vehicle cost is lower. In the material waiting working condition, only the main oil pump and the stirring oil pump need to be driven, and the oil consumption is lower. Moreover, the matching of the pumping oil cylinder and the distribution oil cylinder can be improved through the control logic.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of engineering machinery hydraulic technology, and particularly relates to a single-main-pump pumping hydraulic system and a concrete pumping device. BACKGROUND

[0002] The concrete pumping device is widely applied in modern construction and is driven by a hydraulic system. Figure 1 As shown in the figure, the hydraulic system of the pumping device can specifically include a main pumping hydraulic circuit, a distribution hydraulic circuit and a mixing hydraulic circuit, and typically, the three hydraulic circuits are respectively driven by three independent oil pumps. It can be seen that the hydraulic system of the pumping device includes three oil pumps, which is relatively high in cost.

[0003] The working process of the pumping device can be further divided into a pumping process and a material waiting process. In the pumping process, the pumping oil cylinder and the distribution oil cylinder alternately act to realize the pumping operation, and the three hydraulic circuits are all working to realize the pumping operation of the concrete; the material waiting process is used during the material mixing of the concrete, and usually only the mixing hydraulic circuit works, and the main pumping hydraulic circuit and the distribution hydraulic circuit are in unloading or overflow state. Therefore, in the material waiting process, the main pumping oil pump and the distribution oil pump do not work, and the oil consumption is high. SUMMARY

[0004] In view of the above defects or deficiencies, the present application provides a single-main-pump pumping hydraulic system and a concrete pumping device, which are lower in cost, lower in oil consumption and improved in the matching of the pumping oil cylinder and the distribution oil cylinder.

[0005] To achieve the above-mentioned purpose, the present application provides a single-main-pump pumping hydraulic system, comprising:

[0006] a main pumping hydraulic circuit, comprising a pumping oil cylinder and a pumping electromagnetic directional valve;

[0007] a distribution hydraulic circuit, comprising a distribution oil cylinder and a distribution electromagnetic directional valve;

[0008] a main oil pump, a first pumping oil path is connected between a pump oil outlet of the main oil pump and an oil inlet of the pumping electromagnetic directional valve, a second pumping oil path is connected between the pump oil outlet and an oil inlet of the distribution electromagnetic directional valve, and the first pumping oil path and the second pumping oil path are arranged in parallel;

[0009] a controller for switching control of the pumping electromagnetic directional valve and the distribution electromagnetic directional valve to make the distribution oil cylinder and the pumping oil cylinder alternately act in the pumping process.

[0010] In some embodiments, the pumping oil cylinder comprises a first pumping oil cylinder and a second pumping oil cylinder, and the pumping electromagnetic directional valve comprises a first pumping electromagnet for switching driving of the first pumping oil cylinder in an electrified state and a second pumping electromagnet for switching driving of the second pumping oil cylinder in the electrified state;

[0011] The distribution oil cylinder includes a first distribution oil cylinder and a second distribution oil cylinder, and the distribution electromagnetic reversing valve includes a first distribution electromagnet for switching to drive the first distribution oil cylinder in an energized state and a second distribution electromagnet for switching to drive the second distribution oil cylinder in an energized state;

[0012] And the single master pump pumping hydraulic system further comprises:

[0013] A pressure detection device for detecting the oil pressure in the second pumping oil passage;

[0014] The controller is configured to:

[0015] Control the first distribution electromagnet to be energized to activate the first distribution oil cylinder;

[0016] After a first set time after the first distribution electromagnet is energized, the detected oil pressure of the pressure detection device is acquired in real time until it is determined that the detected oil pressure reaches a set threshold pressure;

[0017] In response to the detected oil pressure reaching the set threshold pressure, the corresponding first pumping electromagnet is controlled to be energized to activate the first pumping oil cylinder.

[0018] In some embodiments, the pumping oil cylinder further comprises an oil cylinder to position detection mechanism for triggering a detection to position signal when the pumping oil cylinder extends to an oil cylinder detection position, and the oil cylinder to position detection mechanism includes a first oil cylinder to position detection mechanism for detecting the first pumping oil cylinder and a second oil cylinder to position detection mechanism for detecting the second pumping oil cylinder;

[0019] The controller is further configured to:

[0020] Acquire a first detection to position signal sent by the first oil cylinder to position detection mechanism;

[0021] At a second set time after the first detection to position signal is acquired, the first pumping electromagnet is controlled to be de-energized to stop the first pumping oil cylinder.

[0022] In some embodiments, the controller is further configured to:

[0023] At a third set time after the first detection to position signal is acquired, the first distribution electromagnet is controlled to be de-energized;

[0024] At a fourth set time after the first distribution electromagnet is de-energized, the second distribution electromagnet is controlled to be energized to activate the second distribution oil cylinder;

[0025] After a first set time after the second distribution electromagnet is energized, the detected oil pressure of the pressure detection device is acquired in real time until it is determined that the detected oil pressure reaches a set threshold pressure;

[0026] In response to detecting that the oil pressure reaches a set threshold pressure, the corresponding second pumping solenoid is powered on to start the second pumping ram.

[0027] In some embodiments, the controller is further configured to:

[0028] acquire a second detected-in-position signal sent by the second ram-in-position detection mechanism;

[0029] at a second set time after acquiring the second detected-in-position signal, control the second pumping solenoid to be powered off to stop the second pumping ram;

[0030] at a third set time after acquiring the second detected-in-position signal, control the second distribution solenoid to be powered off;

[0031] at a fourth set time after the second distribution solenoid is powered off, re-control the first distribution solenoid to be powered on to start the first distribution ram, and complete a pumping stroke of a cycle period.

[0032] In some embodiments, the ram-in-position detection mechanism is a pressure switch, a proximity switch or a displacement sensor.

[0033] In some embodiments, the single-main-pump pumping hydraulic system further comprises:

[0034] an accumulator connected to the second pumping oil circuit; and

[0035] a pressure relief valve arranged in the second pumping oil circuit.

[0036] In some embodiments, the single-main-pump pumping hydraulic system further comprises:

[0037] a check valve arranged in series with the pressure relief valve in the second pumping oil circuit, the check valve being arranged to allow pressure oil to flow from the oil outlet of the pressure relief valve to the oil inlet of the distribution solenoid valve and to be reversely blocked.

[0038] In some embodiments, the single-main-pump pumping hydraulic system further comprises:

[0039] a main relief valve arranged between the oil outlet of the main oil pump and the oil tank.

[0040] In addition, the present application also provides a concrete pumping device comprising the single-main-pump pumping hydraulic system according to the above-mentioned application.

[0041] In some embodiments, the concrete pumping device further comprises a mixing hydraulic system independent of the single-main-pump pumping hydraulic system.

[0042] In the single main pump pumping hydraulic system and the concrete pumping device, the main pumping hydraulic circuit and the distribution hydraulic circuit share a main oil pump, the main oil pump can obtain greater input power under the condition that the engine power is unchanged, the vehicle cost is lower under the condition that one distribution oil pump is cancelled, and the oil consumption is lower when the material is waiting, only the main oil pump and the stirring oil pump are driven. On this basis, the controller for implementing the reversing control logic is additionally arranged to control the alternating operation of the distribution oil cylinder and the pumping oil cylinder, the matching of the pumping oil cylinder and the distribution oil cylinder is improved, and it is ensured that the distribution oil cylinder can move to the position every time.

[0043] Other features and advantages of the present application will be described in detail in the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0044] The accompanying drawings are included to provide an understanding of the application, and are incorporated in and constitute a part of the specification, illustrate embodiments of the application, and, together with the detailed description, serve to explain the principles of the application, but are not intended to limit the application. In the drawings:

[0045] Figure 1 A hydraulic system configuration diagram of the existing concrete pumping device;

[0046] Figure 2 A hydraulic principle diagram of the pumping hydraulic system of the existing concrete pumping device;

[0047] Figure 3 A hydraulic principle diagram of the pumping hydraulic system according to the embodiment of the present application;

[0048] Figure 4 A control flow diagram of the pumping hydraulic system according to the embodiment of the present application; and

[0049] Figure 5 A hydraulic system configuration diagram of the concrete pumping device according to the embodiment of the present application.

[0050] BRIEF DESCRIPTION OF DRAWINGS

[0051] 1 main oil pump 2 main overflow valve

[0052] 3 pumping oil pump 4 pumping oil cylinder

[0053] 5 distribution oil pump 6 oil tank

[0054] 7 accumulator 8 distribution electromagnetic reversing valve

[0055] 9 distribution oil cylinder 10 pressure reducing valve

[0056] 11 check valve 12 pressure detection device

[0057] 13 pumping electromagnetic reversing valve

[0058] 41 first pumping ram 42 second pumping ram

[0059] 81 first distribution electromagnet 82 second distribution electromagnet

[0060] 91 first distribution ram 92 second distribution ram

[0061] 131 first pumping electromagnet 132 second pumping electromagnet DETAILED DESCRIPTION

[0062] The specific embodiments of the present application will be described in detail hereinafter with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative and explanatory and are not intended to limit the present application.

[0063] The pumping hydraulic system of a single master pump and the concrete pumping equipment according to the present application are described below with reference to the accompanying drawings.

[0064] As described above, Figure 1 The hydraulic system of the existing pumping equipment shown mostly includes a main pumping hydraulic circuit, a distribution hydraulic circuit, and a mixing hydraulic circuit, which are respectively driven by three oil pumps. The cost of the oil pumps is high.

[0065] In combination Figure 2 As shown, the existing pumping hydraulic system is generally composed of a pumping oil pump 3, a distribution oil pump 5, a distribution electromagnetic reversing valve 8, a pumping electromagnetic reversing valve 13, a pumping ram 4, a distribution ram 9, and other main valve components. In addition, a main overflow valve 2, an accumulator 7, and the like can also be included. In order to improve the pumping efficiency, the optimal motion logic is as follows: the pumping ram 4 is in place → the distribution ram 9 is actuated → the distribution ram 9 is in place → the other pumping ram 4 starts to move. The distribution ram 9 requires fast actuation speed and needs to be moved to place each time, and therefore the accumulator 7 is usually provided in the distribution system. During the movement of the pumping ram 4, the pumping oil pump 3 is controlled through the pumping electromagnetic reversing valve 13 to drive the pumping ram 4 to move, at which time the distribution ram 9 is in a state of charging the accumulator 7 and being on standby. During the reversing process, the accumulator 7 and the distribution oil pump 5 are controlled through the distribution electromagnetic reversing valve 8 to drive the distribution ram 9 to move quickly, and the pumping oil pump 3 is in an unloading or overflow state.

[0066] The pumping oil pumps of the pumping equipment on the market are mostly controlled by constant power. The constant power parameter value largely represents the maximum capacity of the equipment. The available power of the main pumping hydraulic system = the available power of the engine - the maximum power of the mixing system - the maximum power of the distribution system. As described above, the pumping oil pump and the distribution oil pump are both in a state of not doing work within a certain period of time, which cannot maximize the capacity of the engine. During the material waiting process, the main pumping oil pump and the distribution oil pump are both not doing work, which results in high oil consumption.

[0067] In view of this, the present application aims to provide a single main pump pumping hydraulic system and a control method thereof, as shown in Figure 5 The single main pump pumping hydraulic system in one specific embodiment comprises:

[0068] As shown in Figure 3 The single main pump pumping hydraulic system in one specific embodiment comprises:

[0069] The main pumping hydraulic circuit comprises a pumping cylinder 4 and a pumping electromagnetic switching valve 13;

[0070] The distribution hydraulic circuit comprises a distribution cylinder 9 and a distribution electromagnetic switching valve 8;

[0071] The main oil pump 1 has a first pumping oil path connected between the pump oil outlet and the oil inlet of the pumping electromagnetic switching valve 13, and a second pumping oil path connected between the pump oil outlet and the oil inlet of the distribution electromagnetic switching valve 8, and the first and second pumping oil paths are arranged in parallel;

[0072] The controller is used to switch control of the pumping electromagnetic switching valve 13 and the distribution electromagnetic switching valve 8 to make the distribution cylinder 9 and the pumping cylinder 4 act alternately during pumping.

[0073] It can be seen that in the novel single main pump pumping hydraulic system of the present application, a single main oil pump 1 is used to drive the main pumping hydraulic circuit and the distribution hydraulic circuit simultaneously, which, compared with Figure 1 One distribution oil pump 5 is cancelled, and the cost is lower. When in the material waiting condition, only the main oil pump 1 and the stirring oil pump need to be driven, and the oil consumption is lower. When the main pumping hydraulic circuit and the distribution hydraulic circuit share one main oil pump 1, the main oil pump 1 can obtain greater input power under the condition that the engine power is unchanged.

[0074] On this basis, the controller is additionally arranged to control the alternating action of the distribution cylinder 9 and the pumping cylinder 4, which can improve the matching of the pumping cylinder 4 and the distribution cylinder 9 and ensure that the distribution cylinder can move to the position every time. The following will be specifically described. Figure 4

[0075] Referring to Figure 3 ​In a specific embodiment, the pumping ram 4 includes a first pumping ram 41 and a second pumping ram 42, the pumping electromagnetic reversing valve 13 includes a first pumping electromagnet 131 for switching to drive the first pumping ram 41 in an energized state and a second pumping electromagnet 132 for switching to drive the second pumping ram 42 in an energized state; the distribution ram 9 includes a first distribution ram 91 and a second distribution ram 92, the distribution electromagnetic reversing valve 8 includes a first distribution electromagnet 81 for switching to drive the first distribution ram 91 in an energized state and a second distribution electromagnet 82 for switching to drive the second distribution ram 92 in an energized state; and the single-main-pump pumping hydraulic system further includes:

[0076] a pressure detection device 12 for detecting the oil pressure in the second pumping oil circuit;

[0077] wherein, referring to Figure 4 the controller is configured to:

[0078] energize the first distribution electromagnet 81 to start the first distribution ram 91;

[0079] after a first set time of energizing the first distribution electromagnet 81, real-time acquisition of the detection oil pressure of the pressure detection device 12 is performed until it is determined that the detection oil pressure reaches a set threshold pressure;

[0080] in response to the detection oil pressure reaching the set threshold pressure, the corresponding first pumping electromagnet 131 is energized to start the first pumping ram 41.

[0081] It can be seen that by detecting and controlling the oil pressure in the second pumping oil circuit during the pumping reversing process through the pressure detection device 12, it can be ensured that the distribution ram 9 can move to the right position each time. After starting the first distribution ram 91, the oil pressure in the second pumping oil circuit gradually decreases, and when the detection oil pressure reaches the set threshold pressure, it represents that the cylinder extension position of the first distribution ram 91 is in place. At this time, the first pumping ram 41 can be started to perform the concrete pumping action.

[0082] Specifically, before the distribution ram 9 is actuated, the system pressure in the second pumping oil circuit can be greater than the set threshold pressure. With the pressure oil flowing into the distribution ram 9, the system pressure decreases, and after the distribution ram 9 moves to the right position, the pressure oil of the main oil pump 1 makes the system pressure increase. Therefore, the first set time is set so that the detection of the system pressure is started after the distribution ram 9 starts to act, avoiding false detection.

[0083] Further, Figure 3The pumping oil cylinder in the application can also include a cylinder-in-position detection mechanism for triggering a detection-in-position signal when the pumping oil cylinder reaches the cylinder detection position, which includes a first cylinder-in-position detection mechanism for detecting the first pumping oil cylinder 41 and a second cylinder-in-position detection mechanism for detecting the second pumping oil cylinder 42; such a cylinder-in-position detection mechanism can be a proximity switch, a pressure switch, or a displacement sensor, etc., and similarly, different cylinder-in-position detection mechanisms can be selected and arranged accordingly in the piston extension mode, the piston retraction mode, or the stroke control mode, etc., so as to determine whether the pumping oil cylinder reaches the cylinder detection position, which is well known to those skilled in the art and will not be described in detail here.

[0084] Among them, it should be ensured that on the basis of ensuring that the oil cylinder extends a large amount, the excessive extension is avoided to cause cylinder collision, therefore, the setting of the cylinder detection position is critical, which should be a safe position, which can be set before the maximum extension position of the oil cylinder, and a delay time (i.e. Figure 4 the second setting time in the application) is set according to the oil cylinder extension speed and other conditions to stop the oil pump from continuing to extend.

[0085] At this time, referring to Figure 4 , the controller can also be configured to:

[0086] obtain a first detection-in-position signal sent by the first cylinder-in-position detection mechanism;

[0087] at a second setting time after obtaining the first detection-in-position signal, control the first pumping electromagnet 131 to lose power to stop the first pumping oil cylinder 41.

[0088] It can be seen that after ensuring that the first pumping oil cylinder 41 extends to the preset cylinder detection position, a second setting time is delayed to ensure that the first pumping oil cylinder 41 is stopped after moving to position.

[0089] Further, the controller can also be configured to:

[0090] at a third setting time after obtaining the first detection-in-position signal, control the first distribution electromagnet 81 to lose power;

[0091] at a fourth setting time after the first distribution electromagnet 81 loses power, control the second distribution electromagnet 82 to be powered on to start the second distribution oil cylinder 92;

[0092] after the first setting time after the second distribution electromagnet 82 is powered on, the detection oil pressure of the pressure detection device 12 is obtained in real time until it is determined that the detection oil pressure reaches the set threshold pressure;

[0093] in response to the detection oil pressure reaching the set threshold pressure, control the corresponding second pumping electromagnet 132 to be powered on to start the second pumping oil cylinder 42.

[0094] The third and fourth set time settings ensure the matching of the operation of the pump oil cylinder and the operation of the distribution oil cylinder. Specifically, after the second set time is ensured after the first pump oil cylinder 41 is moved to the position, the first pump electromagnet 131 is controlled to lose power to stop the first pump oil cylinder 41. At the same time, after the third set time is ensured after the first pump oil cylinder 41 is moved to the position, the first distribution electromagnet 81 is controlled to lose power to no longer maintain the pressure of the first distribution oil cylinder 91 extended to the position, and then after the fourth set time, the second distribution electromagnet 82 is controlled to be powered on to start the second distribution oil cylinder 92, and the next distribution and pumping operation is performed.

[0095] Further, referring to Figure 4 , the controller can also be configured to:

[0096] obtain a second detection to position signal sent by the second oil cylinder to position detection mechanism;

[0097] control the second pump electromagnet 132 to lose power to stop the second pump oil cylinder 42 at the second set time after the second detection to position signal is obtained;

[0098] control the second distribution electromagnet 82 to lose power at the third set time after the second detection to position signal is obtained;

[0099] control the first distribution electromagnet 81 to be powered on again to start the first distribution oil cylinder 91 at the fourth set time after the second distribution electromagnet 82 loses power, and complete a cycle of pumping stroke.

[0100] Obviously, when the next distribution and pumping operation is performed, it is similar to the first distribution and pumping operation, which will not be repeated here. Among them, two consecutive distribution and pumping operations constitute a cycle of pumping stroke. Specifically, a cycle of pumping stroke includes: first distribution oil cylinder 91 operation → first distribution oil cylinder 91 to position → first pump oil cylinder 41 starts to move → first pump oil cylinder 41 extends to position → second distribution oil cylinder 92 operation → second distribution oil cylinder 92 to position → second pump oil cylinder 42 operation → second pump oil cylinder 42 extends to position. Through this reversing control logic, the matching of the pump oil cylinder and the distribution oil cylinder can be improved, and the pumping efficiency can be improved. Among them, the distribution oil cylinder 9 requires fast operation speed, and needs to be moved to the position each time.

[0101] In a cycle of pumping stroke, the interval time between each step can be set according to the specific situation, that is, the first set time, the second set time, the third set time and the fourth set time can be set according to the need, and the value can be 0. Of course, the parameter values can be modified according to different working conditions, and the present application is not particularly limited.

[0102] In addition, Figure 3The single-main-pump pumping hydraulic system also includes:

[0103] an accumulator 7 connected to the second pumping oil circuit; and

[0104] a pressure relief valve 10 arranged in the second pumping oil circuit.

[0105] The pressure relief valve 10 is used to set the maximum working pressure of the distribution hydraulic circuit, and the accumulator 7 is in communication with the P port of the distribution electromagnetic switching valve 8 to ensure the quick action of the distribution oil cylinder 9. As an example, the outlet port pressure of the pressure relief valve 10 in the embodiment is set to 21 MPa, and the detection pressure of the pressure detection device 12 is set to 19 MPa as the comparison standard, i.e., the set threshold pressure.

[0106] In addition, to prevent the backflow of pressure oil in the distribution hydraulic circuit, a check valve 11 is arranged in series with the pressure relief valve 10 in the second pumping oil circuit, and the check valve 11 is arranged to allow pressure oil to flow from the outlet port of the pressure relief valve 10 to the inlet port of the distribution electromagnetic switching valve 8 and to be blocked in the reverse direction. The main relief valve 2 is arranged between the pump oil outlet of the main oil pump and the oil tank to set the maximum working pressure of the system and to overflow when the pressure is too high to protect the safe operation of the system.

[0107] The single-main-pump pumping hydraulic system described above can be applied to various concrete pumping devices, such as pump trucks, truck-mounted pumps, and trailer pumps. The concrete pumping device generally also includes a mixing hydraulic system independent of the single-main-pump pumping hydraulic system. That is, the concrete pumping device includes two pumps, i.e., the main oil pump 1 and the mixing oil pump.

[0108] In the embodiment, Figure 3 In the embodiment, the pumping electromagnetic switching valve 13 is connected to the rodless cavity of the pumping oil cylinder 4, and the rod cavity of the first pumping oil cylinder 41 and the rod cavity of the second pumping oil cylinder 42 are in communication, i.e., in the high-pressure pumping state. However, those skilled in the art can understand that the present application also covers the low-pressure pumping state (i.e., the working oil port of the pumping electromagnetic switching valve 13 is connected to the rod cavity of the pumping oil cylinder 4, and the rodless cavity of the first pumping oil cylinder 41 and the rodless cavity of the second pumping oil cylinder 42 are in communication). In this embodiment, each switching valve can be a straight switching valve, a hydraulic switching valve, or an electro-hydraulic switching valve, etc.

[0109] In the description of the present application, it should be understood that the terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0110] In this application, unless otherwise clearly indicated, the terms "mounting", "connection", "connecting", "fixed", "fixedly connected" and the like should be understood in the broadest sense possible, such as it can be fixedly connected, detachably connected, or integral; it can be mechanical connection, or electrical connection, or communication with each other; it can be direct connection, or indirect connection via an intermediate medium; it can be the internal communication of two elements, or the interaction between two elements, unless otherwise clearly indicated. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0111] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0112] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A single main pump pumping hydraulic system characterized by, The single-main-pump pumping hydraulic system comprises: a main pumping hydraulic circuit comprising a pumping cylinder (4) and a pumping electromagnetic directional valve (13); a distribution hydraulic circuit comprising a distribution cylinder (9) and a distribution electromagnetic directional valve (8); a main oil pump (1), a first pumping oil path being connected between a pump oil outlet of the main oil pump (1) and an oil inlet of the pumping electromagnetic directional valve (13), a second pumping oil path being connected between the pump oil outlet and an oil inlet of the distribution electromagnetic directional valve (8), the first and second pumping oil paths being arranged in parallel; and a controller configured to switch control of the pumping electromagnetic directional valve (13) and the distribution electromagnetic directional valve (8) so that the distribution cylinder (9) and the pumping cylinder (4) act alternately during pumping; wherein the pumping cylinder (4) comprises a first pumping cylinder (41) and a second pumping cylinder (42), the pumping electromagnetic directional valve (13) comprises a first pumping electromagnet (131) configured to switch driving of the first pumping cylinder (41) in an energized state and a second pumping electromagnet (132) configured to switch driving of the second pumping cylinder (42) in an energized state; the distribution cylinder (9) comprises a first distribution cylinder (91) and a second distribution cylinder (92), the distribution electromagnetic directional valve (8) comprises a first distribution electromagnet (81) configured to switch driving of the first distribution cylinder (91) in an energized state and a second distribution electromagnet (82) configured to switch driving of the second distribution cylinder (92) in an energized state; the single-main-pump pumping hydraulic system further comprises a pressure detection device (12) configured to detect an oil pressure in the second pumping oil path; the controller is configured to: control the first distribution electromagnet (81) to be energized to start the first distribution cylinder (91); after a first set time of energization of the first distribution electromagnet (81), acquire a detection oil pressure of the pressure detection device (12) in real time until it is determined that the detection oil pressure reaches a set threshold pressure; in response to the detection oil pressure reaching the set threshold pressure, control the corresponding first pumping electromagnet (131) to be energized to start the first pumping cylinder (41).

2. The single main pump pumping hydraulic system of claim 1, wherein, The pumping cylinder further comprises a cylinder-in-position detection mechanism configured to trigger a detection-in-position signal when the pumping cylinder reaches a cylinder detection position, the cylinder-in-position detection mechanism comprising a first cylinder-in-position detection mechanism configured to detect the first pumping cylinder (41) and a second cylinder-in-position detection mechanism configured to detect the second pumping cylinder (42); the controller is further configured to: acquire a first detection-in-position signal sent by the first cylinder-in-position detection mechanism; after a second set time of acquisition of the first detection-in-position signal, control the first pumping electromagnet (131) to be de-energized to stop the first pumping cylinder (41).

3. The single main pump pumping hydraulic system of claim 2, wherein, the controller is further configured to: after a third set time of acquisition of the first detection-in-position signal, control the first distribution electromagnet (81) to be de-energized. The second distribution electromagnet (82) is powered to start the second distribution oil cylinder (92) after a fourth set time when the first distribution electromagnet (81) is powered off; The detection oil pressure of the pressure detection device (12) is acquired in real time after the first set time when the second distribution electromagnet (82) is powered, until the detection oil pressure reaches the set threshold pressure is determined; The second pumping electromagnet (132) is powered to start the second pumping oil cylinder (42) in response to the detection oil pressure reaching the set threshold pressure.

4. The single main pump pumping hydraulic system of claim 3, wherein, The controller is further configured to: acquire a second detection-to-position signal sent by the second oil cylinder-to-position detection mechanism; The second pumping electromagnet (132) is powered to start the second pumping oil cylinder (42) after a fourth set time when the first distribution electromagnet (81) is powered off; The second distribution electromagnet (82) is powered to start the second distribution oil cylinder (92) after a fourth set time when the first distribution electromagnet (81) is powered off; The second distribution electromagnet (82) is powered to start the second distribution oil cylinder (92) after a fourth set time when the first distribution electromagnet (81) is powered off; 5. The single main pump pumping hydraulic system of claim 3, wherein, The oil cylinder-to-position detection mechanism is a pressure switch, a proximity switch or a displacement sensor.

6. The single main pump pumping hydraulic system according to any one of claims 1 to 5, wherein, The single main pump pumping hydraulic system further comprises: an accumulator (7) connected to the second pumping oil circuit; and a pressure reducing valve (10) arranged in the second pumping oil circuit.

7. The single main pump pumping hydraulic system of claim 6, wherein, The single main pump pumping hydraulic system further comprises: a one-way valve (11) arranged in series with the pressure reducing valve (10) in the second pumping oil circuit, the one-way valve (11) being arranged to allow pressure oil to flow from the oil outlet of the pressure reducing valve (10) to the oil inlet of the distribution electromagnet reversing valve (8) and to be reversely cut off.

8. The single main pump pumping hydraulic system of claim 1, wherein, The single main pump pumping hydraulic system further comprises: a main overflow valve (2) arranged between the oil outlet of the main oil pump and the oil tank.

9. A concrete pumping apparatus, characterized by The concrete pumping device comprises the single main pump pumping hydraulic system according to any one of claims 1-8.

10. The concrete pumping apparatus of claim 9, wherein, The concrete pumping device further comprises a mixing hydraulic system independent of the single main pump pumping hydraulic system. The concrete pumping device further comprises a mixing hydraulic system independent of the single main pump pumping hydraulic system.

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