Pumping hydraulic control system, pumping device and engineering machinery

Abstract

This application proposes a pumping hydraulic control system, a pumping device, and engineering machinery. The pumping hydraulic control system includes: a first oil cylinder, a second oil cylinder, a first oil pump, a second oil pump, a first reversing valve, a second reversing valve, a third reversing valve, and an on-off valve. The pumping hydraulic control system can control the operation of the first oil cylinder and the second oil cylinder separately through the first reversing valve and the second reversing valve to achieve single-cylinder single-pump operation, and can also control the first oil cylinder and the second oil cylinder to operate simultaneously after the first oil pump and the second oil pump are merged through the third reversing valve to achieve large-displacement pumping. This can provide a larger displacement when needed to meet the working requirements of large flow and high pressure, and has better practicality.

Description

Technical Field

[0001] The present application relates to the field of pumping technology, and in particular to a pumping hydraulic control system, a pumping device and engineering machinery. Background Art

[0002] At present, engineering machinery pumping equipment usually adopts S valve, gate valve, skirt valve and other distribution valves, refer to Figure 1 During pumping, the main oil cylinder is used to push the concrete in the delivery cylinder. The concrete on one side is pushed out from the delivery cylinder, and the concrete on the other side is sucked into the delivery cylinder. After a single stroke is completed, wait for the distribution valve to switch, the concrete on the suction side is pushed out, and the concrete on the other side is sucked in. The double cylinders alternate to achieve repeated pumping of concrete.

[0003] However, in actual applications, due to the large liquid resistance when the oil passes through the spool of the reversing valve, and the long path when discharging and absorbing oil, the follow-up speed of the cylinder piston rod is often not fast enough, resulting in the need to reduce the production cycle, and in severe cases, it may also affect product quality.

[0004] As users' requirements for production efficiency continue to increase, related technologies usually increase the specifications of the reversing valve and the pipe diameter of the entire oil system, which leads to a significant increase in costs, a relatively bulky mechanism, and unsatisfactory implementation results. Summary of the Invention

[0005] This application aims to solve at least one of the technical problems existing in the related art.

[0006] To this end, a first aspect of the present application is to propose a pumping hydraulic control system.

[0007] A second aspect of the present application is to provide a pumping device.

[0008] The third aspect of the present application is to provide an engineering machine.

[0009] In view of this, according to the first aspect of the present application, a pumping hydraulic control system is proposed, comprising: a first oil pump; a first oil cylinder, comprising a first rodless chamber and a first rod chamber; a first reversing valve, connecting the first oil pump and the first oil cylinder to control the reversing of the first oil cylinder; the first reversing valve has a first working oil port, a second working oil port and a first oil inlet; the first working oil port is connected to the first rodless chamber of the first oil cylinder, the second working oil port is connected to the first rod chamber of the first oil cylinder, and the first oil inlet is connected to the first oil pump; a second oil pump; a second oil cylinder, comprising a second rodless chamber and a second rod chamber; a second reversing valve, connecting the second oil pump and the second cylinder to control the reversing of the second cylinder; the second reversing valve has a third working oil port, a fourth working oil port and The second oil inlet; the third working oil port is connected to the second rodless chamber of the second oil cylinder, the fourth working oil port is connected to the second rod chamber of the second oil cylinder, and the second oil inlet is connected to the second oil pump; wherein, the pumping hydraulic control system also includes a switch valve and a third reversing valve; the third reversing valve includes a third oil inlet, a fifth working oil port and a sixth working oil port; the third oil inlet is connected to the first oil pump, and / or the third oil inlet is connected to the second oil pump; the switch valve connects the first rod chamber and the second rod chamber, the fifth working oil port is connected to the first rodless chamber, and the sixth working oil port is connected to the second rodless chamber; or, the switch valve connects the first rodless chamber and the second rodless chamber, the fifth working oil port is connected to the first rod chamber, and the sixth working oil port is connected to the second rod chamber.

[0010] Among them, in the first mode, the switch valve and the third reversing valve are closed, and the first oil pump supplies oil to the first oil cylinder through the first reversing valve; the second oil pump supplies oil to the second oil cylinder through the second reversing valve; in the second mode, the first reversing valve and the second reversing valve are closed, the switch valve and the third reversing valve are opened, and the first oil pump and / or the second oil pump supplies oil to the first oil cylinder or the second oil cylinder through the third reversing valve.

[0011] In the above technical solution, the first and second oil pumps can independently drive the first and second oil cylinders, respectively, achieving single-pump, single-cylinder operation. Furthermore, the oil provided by the first and / or second oil pumps can be combined through the third reversing valve before entering the first or second oil cylinder. This enables high-displacement pumping, providing greater displacement when needed to meet high-flow, high-pressure requirements and providing improved practicality.

[0012] Specifically, the first and second reversing valves are controlled to close, and the on-off valve is opened. This connects the first rod chamber of the first oil cylinder and the second rod chamber of the second oil cylinder. The third reversing valve is controlled to open, and the first and / or second oil pumps merge. Subsequently, the piston of the first oil cylinder begins to absorb material, while the piston of the second oil cylinder delivers material at the same speed because the first and second rod chambers of the first and second oil cylinders are connected. Conversely, the piston of the second oil cylinder begins to absorb material, while the piston of the first oil cylinder delivers material at the same speed because the first and second rod chambers of the first and second oil cylinders are connected. This completes a pumping cycle for the first and second oil cylinders, i.e., a high-displacement pumping cycle.

[0013] In some technical solutions, optionally, at least one of the first reversing valve, the second reversing valve and the third reversing valve is a three-position four-way reversing valve.

[0014] In the above technical solution, the neutral position function of the three-position four-way directional valve is Y-type.

[0015] In some technical solutions, optionally, in the first mode, the switch valve and the third reversing valve are closed; the first cylinder and the second cylinder are independently controlled by the first reversing valve and the second reversing valve respectively; the sum of the suction stroke time and the reversing time of any one of the first cylinder and the second cylinder is less than or equal to the feeding stroke time of the other cylinder, and the feeding speed of one of the cylinders gradually decreases from the target feeding speed to zero before the feeding stroke is switched to the suction stroke, and the feeding speed of the other cylinder gradually increases from zero to the target feeding speed after the suction stroke is switched to the feeding stroke; when the first cylinder and the second cylinder are feeding at the same time, the sum of the feeding speeds of the first cylinder and the second cylinder is equal to the target feeding speed.

[0016] In the above technical solution, the two cylinders operate independently, and the sum of the suction stroke time and the reversing time of any one of the first and second cylinders is less than or equal to the feeding stroke time of the other cylinder. This allows suction to be completed in a shorter time, providing more buffer time for the reversing process, thereby facilitating control and ensuring that at any given moment, at least one cylinder is feeding, which helps maintain system continuity and efficiency. Furthermore, the sum of the feeding speeds of the two cylinders when feeding simultaneously remains constant. This reduces fluid shock during reversing, achieving a smooth transition.

[0017] In some technical solutions, optionally, in the second mode, the first reversing valve and the second reversing valve are closed, the switch valve and the third reversing valve are opened, and then the first oil cylinder and / or the second oil cylinder supplies oil to the first oil pump or the second oil pump through the third reversing valve, so that one of the first oil cylinder and the second oil cylinder performs a suction action, and the other of the first oil cylinder and the second cylinder performs a feeding action.

[0018] According to a second aspect of the present application, a pumping device is provided, comprising: a first delivery cylinder, a second delivery cylinder, a pump outlet, a hopper, and a pumping hydraulic control system as provided in the first aspect of the present application; wherein the first oil cylinder is connected to the first delivery cylinder; the second oil cylinder is connected to the second delivery cylinder; the first delivery cylinder is connected to the pump outlet or the hopper via a first distributing valve; and the second delivery cylinder is connected to the pump outlet or the hopper via a second distributing valve. Thus, the pumping device has all the beneficial effects of any of the above-mentioned technical solutions, which will not be further elaborated here.

[0019] In actual applications, the distribution valve controls the flow of material between the delivery cylinder and the hopper or pump outlet. During the suction phase, the delivery cylinder and the hopper are connected, allowing material to enter the delivery cylinder. During the delivery phase, the delivery cylinder and the pump outlet are connected, thereby delivering the material to the target location. In this way, the coordinated operation of the first distribution valve and the second distribution valve enables the entire pumping device to operate continuously and efficiently, thereby achieving continuous and stable pumping.

[0020] In some technical solutions, optionally, the pumping device also includes: a fourth reversing valve and a fifth reversing valve; the fourth reversing valve is connected to the first drive structure of the first distributing valve to control the action of the first distributing valve; the fifth reversing valve is connected to the second drive structure of the second distributing valve to control the action of the second distributing valve.

[0021] In the above technical solution, a third oil pump and a fourth oil pump are also included. The third oil pump is connected to the fourth reversing valve, and the fourth oil pump is connected to the fifth reversing valve.

[0022] In the above technical solution, independent third and fourth oil pumps are provided to supply oil to the fourth and fifth reversing valves respectively, so that the first and second distributing valves can be independently controlled, which helps to improve the flexibility and reliability of control.

[0023] In some technical solutions, optionally, both the first distributing valve and the second distributing valve are S-valves, wherein both the first distributing valve and the second distributing valve are disposed in the hopper. The S-valves facilitate smooth material flow within the S-valves, and because the S-valves have a certain degree of curvature, they can more naturally adapt to changes in space.

[0024] In some technical solutions, the pumping device optionally further includes a first eye plate and a second eye plate; the first eye plate is disposed between the first feed port of the first distributing valve and the hopper, for opening or closing the first feed port; the second eye plate is disposed between the second feed port of the second distributing valve and the hopper, for opening or closing the second feed port. Thus, during reversal, the eye plate opens or closes the feed port of the distributing valve, connecting the oil cylinder to the pump outlet or the hopper. This also prevents leakage, thereby improving pumping stability and continuity.

[0025] In some technical solutions, optionally, a blind groove is provided on the opposite side of the first eye plate and the first distributing valve; the bottom surface of the blind groove is in contact with the first feed port of the first distributing valve; a through hole is provided in the blind groove for communication between the first distributing valve and the first conveying cylinder; wherein the second eye plate has the same structure as the first eye plate.

[0026] In the above technical solution, by setting a blind groove, a clear boundary is provided for the movement of the S valve during the swinging process. When the S valve switches between the first state (connected to the conveying cylinder) and the second state (disconnected from the conveying cylinder), the movement trajectory and amplitude of the S valve can be limited, which helps to improve the stability of the entire pumping device and ensure the continuity and accuracy of material transmission.

[0027] According to a third aspect of this application, this application provides an engineering machine comprising the pumping hydraulic control system as provided in the first aspect of this application or the pumping device as provided in the second aspect of this application. Thus, this engineering machine has all the beneficial effects of any of the above technical solutions, which will not be further elaborated here.

[0028] Additional aspects and advantages of the present application will become apparent in the following description or may be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0030] Figure 1 A schematic diagram of a pumping device of related art;

[0031] Figure 2 It is a structural diagram of a pumping feeding mechanism of the related art;

[0032] Figure 3 One of the principle schematic diagrams of the pumping hydraulic control system in the embodiment of the present application is shown;

[0033] Figure 4 FIG2 shows a second schematic diagram of the principle of the pumping hydraulic control system in an embodiment of the present application;

[0034] Figure 5 One of the structural schematic diagrams of the pumping device in the embodiment of the present application is shown;

[0035] Figure 6 The second structural diagram of the pumping device in the embodiment of the present application is shown;

[0036] Figure 7 A schematic diagram showing a pumping hydraulic control system in an embodiment of the present application in a first working state;

[0037] Figure 8 A schematic diagram showing a pumping hydraulic control system in an embodiment of the present application in a second working state;

[0038] Figure 9 A schematic diagram showing a pumping hydraulic control system in an embodiment of the present application in a third working state;

[0039] Figure 10 A schematic diagram showing a pumping hydraulic control system in an embodiment of the present application in a fourth working state;

[0040] Figure 11 The third structural diagram of the pumping device in the embodiment of the present application is shown;

[0041] Figure 12 FIG2 shows a schematic structural diagram of a first eye plate in an embodiment of the present application;

[0042] Figure 13 One of the schematic diagrams of the working state of the pumping device in the embodiment of the present application is shown;

[0043] Figure 14 The second schematic diagram shows the working state of the pumping device in the embodiment of the present application;

[0044] Figure 15 The third schematic diagram shows the working state of the pumping device in the embodiment of the present application;

[0045] Figure 16 FIG4 shows a fourth schematic diagram of the working state of the pumping device in an embodiment of the present application.

[0046] in, Figure 2 The corresponding relationship between the reference numerals and component names is as follows:

[0047] 100'-hopper; 110'-discharge position; 200'-valve control module; 210'-valve seat; 220'-gate valve drive assembly; 300'-feeding module; 310'-feeding pipe; 311'-first feed pipe; 312'-second feed pipe; 313'-third feed pipe; 400'-discharge module;

[0048] Figures 3 to 16 The corresponding relationship between the reference numerals and component names is as follows:

[0049] 10- Pumping hydraulic control system; 100- First oil cylinder; 101- First rodless chamber; 102- First rod chamber; 110- Second oil cylinder; 111- Second rodless chamber; 112- Second rod chamber; 120- First oil pump; 130- Second oil pump; 140- First reversing valve; 141- First working oil port; 142- Second working oil port; 143- First oil inlet; 144- First oil return port; 150- Second reversing valve; 151- Third working oil port; 152- Fourth working oil port; 153- Second oil inlet; 154- Second oil return port; 160- Third reversing valve; 161- Fifth working oil port; 162- Sixth working oil port; 163- Third oil inlet; 164- Third oil return port; 170- Switch valve;

[0050] 20-pumping device; 200-first delivery cylinder; 210-second delivery cylinder; 220-pump outlet; 221-main body; 222-branch pipeline; 230-hopper; 240-first distributing valve; 241-first drive structure; 242-first feed port; 250-second distributing valve; 251-second drive structure; 252-second feed port; 260-first eye plate; 261-blind groove; 262-through hole; 270-second eye plate; 280-third oil pump; 281-fourth reversing valve; 290-fourth oil pump; 291-fifth reversing valve. DETAILED DESCRIPTION

[0051] In order to more clearly understand the above-mentioned objects, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other in the absence of conflict.

[0052] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0053] Reference Figure 2In order to suppress pumping pulses and achieve continuous pumping, thereby alleviating the vibration problem during the pumping process, a pumping feeding mechanism is used in the related art, including a hopper 100', a valve control module 200', a feeding module 300', and a discharging module 400'. Among them, the valve control module 200' is set at the discharging position 110' of the hopper 100'; the feeding module 300' includes three feeding pipes 310' (a first feeding pipe 311', a second feeding pipe 312', and a third feeding pipe 313'), and the suction port and the pushing outlet of the feeding pipe 310' are respectively connected to the valve control module 200'; the discharging module 400' includes three feeding ports connected to the valve control module 200', and the valve control module 200' can control the suction port of each feeding pipe 310' to alternately connect with the hopper 100', the pushing outlet, and the corresponding feeding port.

[0054] Specifically, the valve control module 200' includes a valve seat 210' and a gate valve driving assembly 220'. The gate valve driving assembly 220' is used to control the first valve port and the second valve port on the feed pipe 310' and the valve seat 210' to alternately open and close.

[0055] However, in actual use, the pumping feeding mechanism is relatively complex in structure and has poor feasibility. In addition, continuous pumping is achieved through three cylinders, which makes control difficult and has a high failure rate.

[0056] In order to solve the above problems, the present application proposes a pumping hydraulic control system, a pumping device and an engineering machine.

[0057] The following combination Figures 3 to 16 , the pumping hydraulic control system, pumping device and engineering machinery provided in the embodiments of the present application are described in detail through specific embodiments and their application scenarios.

[0058] Reference Figure 3 Some embodiments of the present application disclose a pumping hydraulic control system 10, whose structure includes a first oil cylinder 100, a second oil cylinder 110, a first oil pump 120, a second oil pump 130, a first reversing valve 140, a second reversing valve 150, a third reversing valve 160, and a switch valve 170.

[0059] Specifically, the first oil cylinder 100 includes a first rodless chamber 101 and a first rod chamber 102; the first reversing valve 140 connects the first oil pump 120 and the first oil cylinder 100 to control the reversing of the first oil cylinder 100, and the first reversing valve 140 has a first working oil port 141, a second working oil port 142 and a first oil inlet 143; the first working oil port 141 is connected to the first rodless chamber 101 of the first oil cylinder 100, the second working oil port 142 is connected to the first rod chamber 102 of the first oil cylinder 100, and the first oil inlet 143 is connected to the first oil pump 120; the second oil cylinder 110 includes a second rodless chamber 111 and a second rod chamber 112; the second reversing valve 150 connects the second oil pump 130 and the second oil cylinder 110 to control the reversing of the second oil cylinder 110, and the second reversing valve 150 has a third working oil port 151, a fourth working oil port 152 and a second oil inlet 153; the third working oil port 151 is connected to the second rodless chamber 111 of the second oil cylinder 110, the fourth working oil port 152 is connected to the second rod chamber 112 of the second oil cylinder 110, and the second oil inlet 153 is connected to the second oil pump 130; the third reversing valve 160 includes a third oil inlet 163, a fifth working oil port 161 and a sixth working oil port 162; the third oil inlet 163 is connected to the first oil pump 120, and / or the third oil inlet 163 is connected to the second oil pump 130; the switch valve 170 connects the first rod chamber 102 and the second rod chamber 112, the fifth working oil port 161 is connected to the first rodless chamber 101, and the sixth working oil port 162 is connected to the second rodless chamber 111.

[0060] Among them, in the first mode, the switch valve 170 and the third reversing valve 160 are closed, and the first oil pump 120 supplies oil to the first oil cylinder 100 through the first reversing valve 140; the second oil pump 130 supplies oil to the second oil cylinder 110 through the second reversing valve 150; in the second mode, the first reversing valve 140 and the second reversing valve 150 are closed, the switch valve 170 and the third reversing valve 160 are opened, and the first oil pump 120 and / or the second oil pump 130 supplies oil to the first oil cylinder 100 or the second oil cylinder 110 through the third reversing valve 160.

[0061] In the above embodiment, the first oil pump 120 and the second oil pump 130 can respectively drive the first oil cylinder 100 and the second oil cylinder 110 to achieve single-pump single-cylinder pumping (first mode). At the same time, the oil provided by the first oil pump 120 and / or the second oil pump 130 can also be combined through the third reversing valve 160 to enter the first oil cylinder 100 or the second oil cylinder 110, and then enter the second oil cylinder 110 or the first oil cylinder 100 through the switch valve 170, thereby linking the first oil cylinder 100 and the second oil cylinder 110. This allows for high-displacement pumping (second mode), thereby providing a larger displacement when needed to meet high-flow and high-pressure working requirements, and improving practicality.

[0062] Specifically, in the first mode, the switch valve 170 and the third reversing valve 160 are closed; the first cylinder 100 and the second cylinder 110 are independently controlled by the first reversing valve 140 and the second reversing valve 150 respectively; the sum of the suction stroke time and the reversing time of any one of the first cylinder 100 and the second cylinder 110 is less than or equal to the feeding stroke time of the other cylinder, and the feeding speed of one of the cylinders gradually decreases from the target feeding speed to zero before the feeding stroke is switched to the suction stroke, and the feeding speed of the other cylinder gradually increases from zero to the target feeding speed after the suction stroke is switched to the feeding stroke; the sum of the feeding speeds when the two cylinders are feeding at the same time is equal to the target feeding speed. In this way, the two cylinders operate independently, and the sum of the suction stroke time and the reversing time of any one of the first cylinder 100 and the second cylinder 110 is less than or equal to the feeding stroke time of the other cylinder. This allows suction to be completed in a shorter time, providing more buffer time for the reversing process, thereby facilitating control and ensuring that at any given moment, at least one cylinder is feeding, which helps maintain system continuity and efficiency. At the same time, the sum of the feeding speeds of the two cylinders when feeding simultaneously remains constant. This reduces fluid shock during reversing, achieving a smooth transition.

[0063] In the second mode, the first reversing valve 140 and the second reversing valve 150 are controlled to be closed, and the switch valve 170 is opened. At this time, the first rod chamber 102 of the first cylinder 100 and the second rod chamber 112 of the second cylinder 110 are connected. The third reversing valve 160 is opened to allow the oil provided by the first oil pump 120 and / or the second oil pump 130 to merge. Subsequently, the piston of the first cylinder 100 is caused to suck the material. Since the first rod chamber 102 of the first cylinder 100 and the second rod chamber 112 of the second cylinder 110 are connected, the piston of the second cylinder 110 is caused to feed the material at the same speed. Conversely, the piston of the second cylinder 110 is caused to suck the material. At the same time, since the first rod chamber 102 of the first cylinder 100 and the second rod chamber 112 of the second cylinder 110 are connected, the piston of the first cylinder 100 is caused to feed the material at the same speed. In this way, one pumping cycle of the first oil cylinder 100 and the second oil cylinder 110, ie, a large-displacement pumping cycle, is completed.

[0064] It is understandable that the switch valve 170 can also connect the first rodless chamber 101 and the second rodless chamber 111. In this case, the fifth working oil port 161 is connected to the first rod chamber 102, and the sixth working oil port 162 is connected to the second rod chamber 112.

[0065] In some embodiments, at least one of the first reversing valve 140 , the second reversing valve 150 , and the third reversing valve 160 is a three-position four-way reversing valve.

[0066] In some embodiments, the first reversing valve 140 is a three-position four-way reversing valve; the first reversing valve 140 has a first working oil port 141, a second working oil port 142, a first oil inlet 143 and a first oil return port 144; the first working oil port 141 is connected to the first rodless chamber 101 of the first oil cylinder 100, the second working oil port 142 is connected to the first rod chamber 102 of the first oil cylinder 100, and the first oil inlet 143 is connected to the first oil pump 120; when working, the first oil return port 144 is connected to the first working oil port 141 or the second working oil port 142.

[0067] The second reversing valve 150 is a three-position four-way reversing valve having a third working oil port 151, a fourth working oil port 152, a second oil inlet 153 and a second oil return port 154; the third working oil port 151 is connected to the second rodless chamber 111 of the second oil cylinder 110, the fourth working oil port 152 is connected to the second rod chamber 112 of the second oil cylinder 110, and the second oil inlet 153 is connected to the second oil pump 130; when working, the second oil return port 154 is connected to the third working oil port 151 or the fourth working oil port 152.

[0068] The third reversing valve 160 is a three-position four-way reversing valve, including a fifth working oil port 161, a sixth working oil port 162, a third oil inlet 163 and a third oil return port 164; the fifth working oil port 161 is connected to the first rodless chamber 101 of the first oil cylinder 100, the sixth working oil port 162 is connected to the second rodless chamber 111 of the second oil cylinder 110, and the third oil inlet 163 is connected to the first oil pump 120 and the second oil pump 130 at the same time; when the third reversing valve 160 is working, the third oil return port 164 is connected to the fifth working oil port 161 or the sixth working oil port 162.

[0069] In the above embodiment, the first oil pump 120 and the second oil pump 130 can respectively control the operation of the first oil cylinder 100 and the second oil cylinder 110, achieving single-pump single-cylinder pumping. At the same time, the oil provided by the first oil pump 120 and the second oil pump 130 can also be combined through the third reversing valve 160 to enter the first oil cylinder 100 or the second oil cylinder 110, and then enter the second oil cylinder 110 or the first oil cylinder 100 through the switch valve 170. In this way, large-displacement pumping can be achieved.

[0070] Specifically, in the second mode, the first reversing valve 140 and the second reversing valve 150 are controlled to be closed, and the switch valve 170 is opened. At this time, the first rod chamber 102 of the first oil cylinder 100 and the second rod chamber 112 of the second oil cylinder 110 are connected, and the oil provided by the first oil pump 120 and the second oil pump 130 are combined. The fifth working oil port 161 of the third reversing valve 160 is controlled to be connected to the first rodless chamber 101. At this time, the piston of the first oil cylinder 100 performs the material suction action, and due to the first oil cylinder 100's The first rod chamber 102 is connected to the second rod chamber 112 of the second cylinder 110, and the piston of the second cylinder 110 delivers material at the same speed. Conversely, the sixth working oil port 162 of the third reversing valve 160 is controlled to be connected to the second rodless chamber 111. At this time, the piston of the second cylinder 110 sucks material. At the same time, because the first rod chamber 102 of the first cylinder 100 and the second rod chamber 112 of the second cylinder 110 are connected, the piston of the first cylinder 100 delivers material at the same speed. This completes a pumping cycle of the first and second cylinders 100, i.e., a high-displacement pumping cycle.

[0071] In the above embodiment, the neutral position function of the three-position four-way reversing valve is Y-shaped.

[0072] Reference Figures 7 to 10 The operating principle of the pumping hydraulic control system 10 provided herein is described in detail. When the pumping hydraulic control system 10 provided herein is applied to a pumping device, when pumping is required, the pistons of the first cylinder 100 and the second cylinder 110 are positioned in the required delivery cylinders, respectively. Arrows pointing toward the cylinders indicate suction, while arrows pointing away from the cylinders indicate delivery.

[0073] Reference Figure 3 and Figure 7 First, close the third reversing valve 160 and the switch valve 170 to control the pumping hydraulic control system 10 to be in the first working state; at this time, the first oil pump 120 is connected to the first oil cylinder 100, and pushes the piston of the first oil cylinder 100 to suck the material, and the second oil pump 130 is connected to the second oil cylinder 110, and pushes the piston of the second oil cylinder 110 to feed the material.

[0074] Reference Figure 3 and Figure 8 Then, before the second oil cylinder 110 is switched, the pumping hydraulic control system 10 is controlled to be in the second working state. At this time, the first reversing valve 140 is used to make the piston of the first oil cylinder 100 perform the feeding action and gradually accelerate to the target feeding speed, while the second reversing valve 150 is used to make the piston of the second oil cylinder 110 maintain the feeding action and gradually decelerate to zero.

[0075] Reference Figure 3 and Figure 9 Then, after the second oil cylinder 110 completes the reversal, the pumping hydraulic control system 10 is controlled to be in the third working state. At this time, the piston of the second oil cylinder 110 performs the material suction action, while the first reversing valve 140 does not move, so that the piston of the first oil cylinder 100 maintains the feeding action.

[0076] Reference Figure 3 and Figure 10 Then, before the first oil cylinder 100 is switched, the pumping hydraulic control system 10 is controlled to be in the fourth working state. At this time, the second reversing valve 150 is used to make the piston of the second oil cylinder 110 perform the feeding action and gradually accelerate to the target feeding speed. The first reversing valve 140 is used to make the piston of the first oil cylinder 100 maintain the feeding action and gradually decelerate to zero.

[0077] Finally, after the first oil cylinder 100 completes the reversal, the pumping hydraulic control system 10 is controlled to return to the first working state, completing one cycle, ie, a continuous pumping cycle.

[0078] In the above embodiment, oil from the first oil pump 120 flows into the first cylinder 100, driving it; oil from the second oil pump 130 flows into the second cylinder 110, driving it. Furthermore, when the first or second cylinder 100, 110 switches direction, the first and second cylinders 100, 110 maintain synchronous feeding, and the sum of their feeding speeds remains constant. This prevents discontinuous pumping and helps improve pumping continuity and stability. This achieves continuous pumping with a single pump, single cylinder, and single valve.

[0079] In some embodiments, the first reversing valve 140, the second reversing valve 150, and the third reversing valve 160 are all solenoid valves. The on-off valve 170 is a hydraulic valve. In practical applications, the first reversing valve 140, the second reversing valve 150, and the third reversing valve 160 can also be manual valves or hydraulic valves, and this embodiment is not limited thereto.

[0080] In some embodiments, in the second mode, the first reversing valve 140 and the second reversing valve 150 are controlled to be closed, the switch valve 170 is opened, and the third reversing valve 160 is opened; the first cylinder 100 and / or the second cylinder 110 supplies oil to the first oil pump 120 and the second oil pump 130 through the third reversing valve 160, so that one of the first cylinder 100 and the second cylinder 110 performs a suction action, and the other of the first cylinder 100 and the second cylinder 110 performs a feeding action at the same speed.

[0081] Reference Figures 4 to 16According to the second aspect of the present application, in some embodiments, the present application further provides a pumping device 20, comprising a first delivery cylinder 200, a second delivery cylinder 210, a pump outlet 220, a hopper 230, and the pumping hydraulic control system 10 provided in any of the above embodiments; wherein the first oil cylinder 100 is connected to the first delivery cylinder 200, the second oil cylinder 110 is connected to the second delivery cylinder 210; the first delivery cylinder 200 is connected to the pump outlet 220 or the hopper 230; and the second delivery cylinder 210 is connected to the pump outlet 220 or the hopper 230. Thus, the pumping device 20 has all the beneficial effects of any of the above embodiments, which will not be elaborated upon here.

[0082] Reference Figure 5 、 Figure 6 and Figure 11 In some embodiments, the pumping device 20 further includes a first dispensing valve 240 and a second dispensing valve 250 .

[0083] Specifically, the hopper 230 is used to store the material to be pumped. The first delivery cylinder 200 is connected to the hopper 230 or the pump outlet 220 via the first distribution valve 240 ; the second delivery cylinder 210 is connected to the hopper 230 or the pump outlet 220 via the second distribution valve 250 .

[0084] In this way, the distribution valve controls the flow of material between the delivery cylinder and the hopper 230 or the pump outlet 220. During the suction phase, the delivery cylinder and the hopper 230 are connected, allowing the material to enter the delivery cylinder. During the delivery phase, the delivery cylinder and the pump outlet 220 are connected, thereby delivering the material to the target location. In this way, through the coordinated operation of the first distribution valve 240 and the second distribution valve 250, the entire pumping device 20 operates continuously and efficiently, thereby achieving continuous and stable pumping.

[0085] Reference Figure 4 and Figure 11 In the above embodiment, the pumping device further includes a third oil pump 280 and a fourth oil pump 290. Specifically, the third oil pump 280 is connected to the first drive structure 241 of the first distributing valve 240 via the fourth reversing valve 281 to control the operation of the first distributing valve 240, thereby connecting or disconnecting the first distributing valve 240 and the first delivery cylinder 200, i.e., connecting the first delivery cylinder 200 to the pump outlet 220 or the hopper 230. The fourth oil pump 290 is connected to the second drive structure 251 of the second distributing valve 250 via the fifth reversing valve 291 to control the operation of the second distributing valve 250, thereby connecting or disconnecting the second distributing valve 250 and the second delivery cylinder 210, i.e., connecting the second delivery cylinder 210 to the pump outlet 220 or the hopper 230.

[0086] In the above embodiment, the independent third oil pump 280 and fourth oil pump 290 are provided, which helps to improve the flexibility and reliability of control.

[0087] In actual application, the fourth reversing valve 281 and the fifth reversing valve 291 are both three-position four-way reversing valves. The connection relationship between them and the corresponding drive structure can refer to the connection relationship of the reversing valves described above. This is not difficult for those skilled in the art and will not be described in detail here.

[0088] Reference Figures 11 to 16 In some embodiments, the first distributing valve 240 and the second distributing valve 250 are S-valves. This helps to ensure smooth flow of materials in the S-valves. At the same time, since the S-valves have a certain degree of curvature, they can more naturally adapt to changes in space.

[0089] Specifically, the first distributing valve 240 and the second distributing valve 250 are arranged in the hopper 230, and the discharge ports of the first distributing valve 240 and the second distributing valve 250 are both connected to the pump outlet 220. The first feed port 242 of the first distributing valve 240 and the second feed port 252 of the second distributing valve 250 swing under the oil provided by the third oil pump 280 and the fourth oil pump 290, thereby connecting or disconnecting with the corresponding conveying cylinder.

[0090] In the above embodiment, the pumping device 20 further includes a first eye plate 260 and a second eye plate 270. Specifically, the first eye plate 260 is disposed between the first feed port 242 of the first distributing valve 240 and the hopper 230 to open or close the first feed port 242. When the first distributing valve 240 and the first delivery cylinder 200 are disconnected, the first eye plate 260 can seal the first feed port 242. Similarly, the second eye plate 270 is disposed between the second feed port 252 of the second distributing valve 250 and the hopper 230 to open or close the second feed port 252. When the second distributing valve 250 and the second delivery cylinder 210 are disconnected, the second eye plate 270 can seal the second feed port 252. Thus, during reversal, the eye plate opens or closes the feed port of the distributing valve, connecting the oil cylinder to the pump outlet or hopper. Furthermore, after reversal, material leakage is prevented, thereby improving pumping stability and continuity.

[0091] Reference Figure 11 and Figure 12 In some embodiments, a blind groove 261 is defined on a surface of the first eye plate 260 that faces the first feed port 242 of the first distributing valve 240. The bottom surface of the blind groove 261 abuts against the first feed port 242 of the first distributing valve 240. A through hole 262 is defined in the blind groove 261 to form a material passageway for communication between the first distributing valve 240 and the first delivery cylinder 200.

[0092] In the above embodiment, by providing the blind groove 261, a clear boundary is provided for the movement of the S valve during the swinging process. When the S valve switches between the first state (connected to the conveying cylinder) and the second state (disconnected from the conveying cylinder), the movement trajectory and amplitude of the S valve can be limited, thereby helping to improve the stability of the entire pumping device 20 and ensure the continuity and accuracy of material transmission.

[0093] In some embodiments, the structure of the second eye plate 270 is the same as that of the first eye plate 260. This facilitates processing.

[0094] Among them, reference Figures 13 to 16 , the working process of the pumping device of the present application is described in detail. Among them, the direction of the arrow toward the hopper 230 represents feeding, and the direction of the arrow away from the hopper 230 represents suction.

[0095] Reference Figure 13 , set the initial working state, so that the first conveying cylinder 200 sucks the material and the second conveying cylinder 210 delivers the material; at this time, the first conveying cylinder 200 and the first distribution valve 240 are disconnected, and the second conveying cylinder 210 and the second distribution valve 250 are connected;

[0096] Reference Figure 14 Before the second delivery cylinder 210 completes feeding, the first delivery cylinder 200 and the first distribution valve 240 are connected. At this time, the first delivery cylinder 200 and the second delivery cylinder 210 feed the materials at the same time;

[0097] Reference Figure 15 After the second delivery cylinder 210 completes the feeding, the second delivery cylinder 210 is disconnected from the second distribution valve 250. At this time, the second delivery cylinder 210 is sucking the material, and the first delivery cylinder 200 keeps feeding the material;

[0098] Reference Figure 16 Before the first conveying cylinder 200 completes feeding, the second conveying cylinder 210 and the second distributing valve 250 are connected. At this time, the first conveying cylinder 200 and the second conveying cylinder 210 feed the materials at the same time;

[0099] After the first conveying cylinder 200 completes feeding, it returns to the initial working state.

[0100] In some embodiments, the first distributing valve 240 and the second distributing valve 250 may also be gate valves (see Figure 5 and Figure 6 ) or cone valve, etc., but this embodiment is not limited thereto.

[0101] In some embodiments, the first conveying cylinder 200 and the second conveying cylinder 210 are arranged in parallel on the same side of the hopper 230 , thereby facilitating the overall layout.

[0102] In the above embodiment, the pump outlet 220 includes a main body 221 and two branch pipes 222. The two branch pipes 222 are respectively connected to the discharge ports of the first distributing valve 240 and the second distributing valve 250, so that the materials of the first distributing valve 240 and the second distributing valve 250 can be collected on the main body 221, ensuring that the materials can be discharged uniformly, thereby helping to further improve the continuity and stability of pumping.

[0103] In some embodiments, the pumping device 20 further includes a stirring mechanism (not shown in the drawings). The stirring mechanism is disposed in the hopper 230 and is used to stir the material in the hopper 230, thereby improving the uniformity of the material and thus helping to improve the stability of transportation.

[0104] According to the third aspect of the present application, in some embodiments, the present application also proposes an engineering machinery, which has a pumping hydraulic control system 10 or a pumping device 20 proposed in any of the above embodiments. Thus, the engineering machinery has all the beneficial effects of any of the above embodiments, which will not be repeated here.

[0105] Exemplarily, the engineering machinery includes a concrete pump truck, a slurry pump truck, and the like.

[0106] It should be clarified that in the claims, specification and drawings of this application, the term "plurality" refers to two or more. Unless otherwise clearly defined, the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the purpose of more conveniently describing this application and making the description process simpler, and is not intended to indicate or imply that the device or element referred to must have the specific orientation described, be constructed and operated in a specific orientation. Therefore, these descriptions cannot be understood as limitations on this application. The terms "connect", "install", "fix" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection between multiple objects, or a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects, or an indirect connection between multiple objects through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood based on the specific circumstances of the above data.

[0107] In the claims, specification, and drawings of this application, the terms "one embodiment," "some embodiments," "a specific embodiment," and the like mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of this application. In the claims, specification, and drawings of this application, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0108] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A pumping hydraulic control system, characterized in that: include: First oil pump; The first oil cylinder includes a first rodless cavity and a first rod cavity; a first reversing valve connecting the first oil pump and the first oil cylinder to control the reversing of the first oil cylinder; the first reversing valve includes a first working oil port, a second working oil port, and a first oil inlet; the first working oil port is connected to the first rodless chamber of the first oil cylinder, the second working oil port is connected to the first rod chamber of the first oil cylinder, and the first oil inlet is connected to the first oil pump; Second oil pump; The second oil cylinder includes a second rodless cavity and a second rod cavity; a second reversing valve, connecting the second oil pump and the second oil cylinder to control the reversing of the second oil cylinder; the second reversing valve includes a third working oil port, a fourth working oil port, and a second oil inlet; the third working oil port is connected to the second rodless chamber of the second oil cylinder, the fourth working oil port is connected to the second rod chamber of the second oil cylinder, and the second oil inlet is connected to the second oil pump; The pumping hydraulic control system further comprises: a switch valve and a third reversing valve; the third reversing valve comprises a third oil inlet, a fifth working oil port and a sixth working oil port; the third oil inlet is connected to the first oil pump, and / or the third oil inlet is connected to the second oil pump; The switch valve connects the first rod chamber and the second rod chamber, the fifth working oil port is connected to the first rodless chamber, and the sixth working oil port is connected to the second rodless chamber; or The switch valve connects the first rodless chamber and the second rodless chamber, the fifth working oil port is connected to the first rod chamber, and the sixth working oil port is connected to the second rod chamber; In the first mode, the switch valve and the third reversing valve are closed, the first oil pump supplies oil to the first oil cylinder through the first reversing valve, and the second oil pump supplies oil to the second oil cylinder through the second reversing valve; In the second mode, the first reversing valve and the second reversing valve are closed, the switch valve and the third reversing valve are opened, and the first oil pump and / or the second oil pump supplies oil to the first oil cylinder or the second oil cylinder through the third reversing valve.

2. The pumping hydraulic control system according to claim 1, characterized in that: At least one of the first reversing valve, the second reversing valve and the third reversing valve is a three-position four-way reversing valve.

3. The pumping hydraulic control system according to claim 1 or 2, characterized in that: In the first mode, the switch valve and the third reversing valve are closed; the first cylinder and the second cylinder are independently controlled by the first reversing valve and the second reversing valve respectively; the sum of the suction stroke time and the reversing time of any one of the first cylinder and the second cylinder is less than or equal to the feeding stroke time of the other cylinder, and the feeding speed of one cylinder gradually decreases from the target feeding speed to zero before the feeding stroke switches to the suction stroke, and the feeding speed of the other cylinder gradually increases from zero to the target feeding speed after the suction stroke switches to the feeding stroke; When the first oil cylinder and the second oil cylinder feed materials simultaneously, the sum of the feeding speeds of the first oil cylinder and the second oil cylinder is equal to the target feeding speed.

4. The pumping hydraulic control system according to claim 1 or 2, characterized in that: In the second mode, the first reversing valve and the second reversing valve are closed, and the switch valve and the third reversing valve are opened; the first oil pump and / or the second oil pump supplies oil to the first oil cylinder or the second oil cylinder through the third reversing valve, so that one of the first oil cylinder and the second oil cylinder performs a suction action, and the other of the first oil cylinder and the second oil cylinder performs a feeding action.

5. A pumping device, characterized in that: include: a first delivery cylinder, a second delivery cylinder, a pump outlet, a hopper, and a pumping hydraulic control system according to any one of claims 1 to 4; Wherein, the first oil cylinder is connected to the first delivery cylinder; the second oil cylinder is connected to the second delivery cylinder; The first delivery cylinder is connected to the pump outlet or the hopper through a first distribution valve; The second delivery cylinder is connected to the pump outlet or the hopper through a second distribution valve.

6. The pumping device according to claim 5, characterized in that The pumping device further comprises: a fourth reversing valve, the fourth reversing valve being in communication with the first driving structure of the first distributing valve to control the movement of the first distributing valve; A fifth reversing valve is connected to the second driving structure of the second distributing valve to control the action of the second distributing valve.

7. The pumping device according to claim 6, characterized in that Also includes: a third oil pump, connected to the fourth reversing valve; The fourth oil pump is connected to the fifth reversing valve.

8. The pumping device according to claim 6 or 7, characterized in that The first distributing valve and the second distributing valve are both S valves; Wherein, the first distributing valve and the second distributing valve are both arranged in the hopper; The pumping device also includes a first eye plate and a second eye plate; The first eye plate is arranged between the first feed port of the first distributing valve and the hopper, and is used to open or close the first feed port; The second eye plate is arranged between the second feed port of the second distributing valve and the hopper, and is used to open or close the second feed port.

9. The pumping device according to claim 8, characterized in that A blind groove is provided on a side of the first eye plate opposite to the first distributing valve; the bottom surface of the blind groove is in contact with the first feed port of the first distributing valve; a through hole is provided in the blind groove for communication between the first distributing valve and the first delivery cylinder; The second eye plate has the same structure as the first eye plate.

10. An engineering machine, characterized in that: include: The pumping hydraulic control system according to any one of claims 1 to 4; or A pumping device as claimed in any one of claims 5 to 9.

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