Pumping hydraulic control system, pumping device and engineering machinery

Abstract

The invention provides a pumping hydraulic control system, a pumping device and engineering machinery. The pumping hydraulic control system comprises 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 a switch valve, the first oil cylinder and the second oil cylinder can be controlled to work through the first reversing valve and the second reversing valve respectively, single-cylinder single-pump work is achieved, the first oil cylinder and the second oil cylinder can be controlled to work simultaneously after the first oil pump and the second oil pump converge through the third reversing valve, and large-displacement pumping is achieved. And therefore, larger displacement can be provided when needed, the working requirements of large flow and high pressure are met, and the practicability is better.

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 uses distribution valves such as S valves, gate valves, skirt valves, etc. 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 at the same time, 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, since the liquid resistance is large when the oil passes through the valve core of the reversing valve, and the path through which the oil is discharged and absorbed is also long, 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, the relevant 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] The present 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 provide 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 a construction 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 oil cylinder to control the reversing of the second oil 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 oil pump and the second oil pump can drive the first oil cylinder and the second oil cylinder separately to realize single pump single cylinder operation; at the same time, the oil provided by the first oil pump and / or the second oil pump can also enter the first oil cylinder or the second oil cylinder after being combined through the third reversing valve. In this way, large displacement pumping is realized, so that a larger displacement can be provided when needed to meet the working requirements of large flow and high pressure, and the practicality is better.

[0012] Specifically, the first reversing valve and the second reversing valve are controlled to be closed, and the switch valve is opened. At this time, the first rod chamber of the first oil cylinder and the second rod chamber of the second oil cylinder are connected. The third reversing valve is controlled to be opened. At this time, the first oil pump and / or the second oil pump merge, and then the piston of the first oil cylinder performs a suction action, and because the first rod chamber of the first oil cylinder and the second rod chamber of the second oil cylinder are connected, the piston of the second oil cylinder performs a feeding action at the same speed; conversely, the piston of the second oil cylinder performs a suction action, and at the same time, because the first rod chamber of the first oil cylinder and the second rod chamber of the second oil cylinder are connected, the piston of the first oil cylinder performs a feeding action at the same speed. In this way, a pumping cycle of the first oil cylinder and the second oil cylinder is completed, that is, a large-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 middle position function of the three-position four-way reversing valve is Y-type.

[0015] In some technical schemes, 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 before the feeding stroke is switched to the suction stroke, the feeding speed of one of the cylinders gradually decreases from the target feeding speed to zero, and after the suction stroke is switched to the feeding stroke, the feeding speed of the other cylinder gradually increases from zero to the target feeding speed; 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 oil cylinders operate independently, and the sum of the suction stroke time and the reversing time of any one of the first oil cylinder and the second oil cylinder is less than or equal to the feeding stroke time of the other oil cylinder, so that the suction can be completed in a shorter time, so that more buffer time can be provided for the reversing process, so as to facilitate control and ensure that at any time, at least one oil cylinder is performing the feeding operation, which helps to maintain the continuity and efficiency of the system. At the same time, the sum of the feeding speeds of the two oil cylinders when feeding at the same time is kept constant, so that when reversing, the fluid shock can be reduced to achieve a smooth transition.

[0017] In some technical schemes, 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 oil cylinder performs a feeding action.

[0018] According to the second aspect of the present application, the present application proposes a pumping device, comprising: a first delivery cylinder, a second delivery cylinder, a pump outlet, a hopper, and a pumping hydraulic control system as proposed 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 through the first distribution valve; the second delivery cylinder is connected to the pump outlet or the hopper through the second distribution valve. Therefore, the pumping device has all the beneficial effects of any of the above technical solutions, which will not be repeated here.

[0019] In practical applications, the distribution valve is used to control the flow of materials between the delivery cylinder and the hopper or pump outlet. In the suction stage, the delivery cylinder and the hopper are connected to allow the material to enter the delivery cylinder. In the delivery stage, the delivery cylinder and the pump outlet are connected to deliver the material to the target location. In this way, the first distribution valve and the second distribution valve work together to enable the entire pumping device to operate continuously and efficiently, thereby achieving continuous and stable pumping.

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

[0021] In the above technical solution, it also includes a third oil pump and a fourth oil pump, 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 distributing valve and the second distributing valve can be independently controlled, which helps to improve the flexibility and reliability of control.

[0023] In some technical solutions, optionally, the first distribution valve and the second distribution valve are both S valves; wherein the first distribution valve and the second distribution valve are both arranged in the hopper. The S valve helps to make the material flow smoothly in the S valve, and at the same time, because the S valve has a certain curvature, it can more naturally adapt to changes in space.

[0024] In some technical solutions, the pumping device may further include 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, and is used to open or close the first feed port; the second eye plate is disposed between the second feed port of the second distributing valve and the hopper, and is used to open or close the second feed port. In this way, when switching, the feed port of the distributing valve is opened or closed by the eye plate, so that the oil cylinder is connected to the pump outlet or the hopper, and at the same time, leakage can be avoided, thereby helping to improve the stability and continuity of pumping.

[0025] In some technical schemes, optionally, a blind groove is provided on the side opposite to 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 connecting 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 with 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 the third aspect of the present application, the present application proposes an engineering machine, including the pumping hydraulic control system as proposed in the first aspect of the present application or the pumping device as proposed in the second aspect of the present application. Therefore, the engineering machine has all the beneficial effects of any of the above technical solutions, which will not be repeated here.

[0028] Additional aspects and advantages of the present application will become apparent in the following description or will 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 schematic diagram of a pumping feeding mechanism of the related technology;

[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 The second schematic diagram of the principle of the pumping hydraulic control system in the embodiment of the present application is shown;

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

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

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

[0041] Fig.12 A schematic structural diagram of a first eye plate in an embodiment of the present application is shown;

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

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

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

[0045] Fig.16 A fourth schematic diagram of the working state of the pumping device in the embodiment of the present application is shown.

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

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

[0048] Figures 3 to 16 The corresponding relationship between the reference numerals and the 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-switching valve;

[0050] 20-pumping device; 200-first delivery cylinder; 210-second delivery cylinder; 220-pump outlet; 221-main body; 222-branch pipe; 230-hopper; 240-first distribution valve; 241-first drive structure; 242-first feed port; 250-second distribution 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 purposes, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without 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 realize 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 be alternately connected with the hopper 100', the pushing outlet and the corresponding feeding port.

[0054] Specifically, the valve control module 200' comprises 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 switch on and off alternately.

[0055] However, in actual use, the pumping feeding mechanism has a complex structure and poor feasibility, and continuous pumping is achieved through three cylinders, which is difficult to control 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] Combine the following 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 realize 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 enter the first oil cylinder 100 or the second oil cylinder 110 after confluence through the third reversing valve 160, and enter the second oil cylinder 110 or the first oil cylinder 100 through the switch valve 170, and the first oil cylinder 100 and the second oil cylinder 110 are linked. In this way, large-displacement pumping (second mode) can be realized, so that a larger displacement can be provided when needed to meet the working requirements of large flow and high pressure, and the practicality is better.

[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, so that the suction can be completed in a shorter time, which can provide more buffer time for the reversing process, thereby facilitating control and ensuring that at any time, at least one cylinder is performing the feeding operation, which helps to maintain the continuity and efficiency of the system. At the same time, the sum of the feeding speeds of the two cylinders when feeding at the same time remains constant, so that when reversing, the fluid shock can be reduced to achieve 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, and 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, and 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 performs a feeding action at the same speed; conversely, the piston of the second cylinder 110 is caused to suck the material, and 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 performs a feeding action at the same speed. In this way, a 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 actions of the first oil cylinder 100 and the second oil cylinder 110 to realize 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 enter the first oil cylinder 100 or the second oil cylinder 110 after merging through the third reversing valve 160, and 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 realized.

[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, and the fifth working oil port 161 of the third reversing valve 160 is controlled to be connected with the first rodless chamber 101. At this time, the piston of the first oil cylinder 100 performs a suction action, and due to the first oil cylinder 100 The first rod chamber 102 is connected to the second rod chamber 112 of the second oil cylinder 110, and the piston of the second oil cylinder 110 performs a feeding action 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 oil cylinder 110 performs a suction action, and at the same time, since 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, the piston of the first oil cylinder 100 performs a feeding action at the same speed. In this way, a pumping cycle of the first oil cylinder 100 and the second oil cylinder 110 is completed, that is, a large displacement pumping cycle.

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

[0072] Reference Figures 7 to 10 , the working principle of the pumping hydraulic control system 10 provided by the present application is described in detail. When the pumping hydraulic control system 10 provided by the present application is applied to a pumping device, when pumping is required, the pistons of the first oil cylinder 100 and the second oil cylinder 110 are respectively located in the required delivery cylinders. Among them, the arrow toward the oil cylinder indicates the suction action, and the arrow away from the oil cylinder indicates the feeding action.

[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 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 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 piston of the first oil cylinder 100 is fed through the first reversing valve 140 and gradually accelerated to the target feeding speed, while the piston of the second oil cylinder 110 is kept feeding and gradually decelerated to zero through the second reversing valve 150.

[0075] Reference Figure 3 and Fig. 9 Then, after the second oil cylinder 110 is switched, 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 Fig.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 piston of the second oil cylinder 110 is fed through the second reversing valve 150 and gradually accelerated to the target feeding speed. The piston of the first oil cylinder 100 is kept in the feeding action and gradually decelerated to zero through the first reversing valve 140.

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

[0078] In the above embodiment, the oil of the first oil pump 120 flows into the first oil cylinder 100 to drive the first oil cylinder 100 to move; the oil of the second oil pump 130 flows into the second oil cylinder 110 to drive the second oil cylinder 110 to move. In addition, when the first oil cylinder 100 or the second oil cylinder 110 is switched, the first oil cylinder 100 and the second oil cylinder 110 keep feeding synchronously, and the sum of the feeding speeds remains constant, thereby avoiding the phenomenon of discontinuous pumping, which helps to improve the continuity and stability of pumping. In this way, continuous pumping of a single pump, a single cylinder and a single valve is achieved.

[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 switch 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 the present 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 oil cylinder 100 and / or the second oil 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 oil cylinder 100 and the second oil cylinder 110 performs a suction action, and the other of the first oil 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 proposes a pumping device 20, which includes a first delivery cylinder 200, a second delivery cylinder 210, a pump outlet 220, a hopper 230, and a pumping hydraulic control system 10 proposed 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; the second delivery cylinder 210 is connected to the pump outlet 220 or the hopper 230. Therefore, the pumping device 20 has all the beneficial effects of any of the above embodiments, which will not be repeated here.

[0082] Reference Figure 5 , Figure 6 and Fig.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 through the first distribution valve 240 ; the second delivery cylinder 210 is connected to the hopper 230 or the pump outlet 220 through the second distribution valve 250 .

[0084] In this way, the material flow between the delivery cylinder and the hopper 230 or the pump outlet 220 is controlled by the distribution valve. In the suction stage, the delivery cylinder and the hopper 230 are connected to allow the material to enter the delivery cylinder. In the delivery stage, the delivery cylinder and the pump outlet 220 are connected to deliver the material to the target location. In this way, the first distribution valve 240 and the second distribution valve 250 work together to make the entire pumping device 20 operate continuously and efficiently, so that the entire pumping device 20 can achieve continuous and stable pumping.

[0085] Reference Figure 4 and Fig.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 distribution valve 240 through the fourth reversing valve 281 to control the action of the first distribution valve 240, so that the first distribution valve 240 and the first delivery cylinder 200 are connected or disconnected, even if the first delivery cylinder 200 is connected to the pump outlet 220 or connected to the hopper 230; the fourth oil pump 290 is connected to the second drive structure 251 of the second distribution valve 250 through the fifth reversing valve 291 to control the action of the second distribution valve 250, so that the second distribution valve 250 and the second delivery cylinder 210 are connected or disconnected, even if the second delivery cylinder 210 is connected to the pump outlet 220 or connected to the hopper 230.

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

[0087] In practical applications, 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 mentioned above. For those skilled in the art, there is no difficulty and it will not be repeated 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 make the material flow smoothly in the S valve. At the same time, since the S valve has a certain curvature, it 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 outlets of the first distributing valve 240 and the second distributing valve 250 are 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 cylinders.

[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, and 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, and 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. In this way, when switching, the feed port of the distributing valve is opened or closed by the eye plate, so that the oil cylinder and the pump outlet or the hopper are connected, and at the same time, after switching, leakage can be avoided, thereby helping to improve the stability and continuity of pumping.

[0091] Reference Fig.11 and Fig.12 In some embodiments, a blind groove 261 is provided on a side of the first eye plate 260 opposite to the first feed port 242 of the first distributing valve 240, and the bottom surface of the blind groove 261 is in contact with the first feed port 242 of the first distributing valve 240. A through hole 262 is provided in the blind groove 261 to form a material channel for the first distributing valve 240 to communicate with the first delivery cylinder 200.

[0092] In the above embodiment, by setting 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 with 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 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. In this way, processing is facilitated.

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

[0095] Reference Fig.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 Fig.14 Before the second delivery cylinder 210 completes the 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 are feeding at the same time;

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

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

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

[0100] In some embodiments, the first dispensing valve 240 and the second dispensing valve 250 may also be gate valves (see Figure 5 and Figure 6 ) or cone valve, etc., but the present 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 has a body 221 and two branch pipes 222. The two branch pipes 222 are respectively connected to the discharge ports of the first distribution valve 240 and the second distribution valve 250, so that the materials of the first distribution valve 240 and the second distribution valve 250 can be collected on the body 221, ensuring that the materials can be uniformly output, 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 the 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 construction machinery includes a concrete pump truck, a mud pump truck, and the like.

[0106] It should be clarified that in the claims, specification and drawings of the present application, the term "multiple" refers to two or more than two. Unless otherwise clearly defined, the orientation or position relationship indicated by the terms "upper" and "lower" is based on the orientation or position relationship shown in the drawings, which is only for the purpose of more conveniently describing the present application and making the description process easier, rather than indicating or implying that the device or element referred to must have the specific orientation described, be constructed and operated in a specific orientation, so these descriptions cannot be understood as limitations on the present 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 the present application, the description of the terms "one embodiment", "some embodiments", "specific embodiments" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the claims, specification and drawings of the present application, the 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 one or more embodiments or examples in a suitable manner.

[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 substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A pumping hydraulic control system, characterized in that: include: First oil pump; A first oil cylinder, comprising a first rodless chamber and a first rod chamber; A first reversing valve is connected to 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 a first rodless chamber of the first oil cylinder, the second working oil port is connected to a 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 chamber and a second rod chamber; A second reversing valve is connected to 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; Wherein, the pumping hydraulic control system further 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; 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 oil cylinder and the second oil 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 oil cylinder and the second oil cylinder is less than or equal to the feeding stroke time of the other oil cylinder, and before the feeding stroke is switched to the suction stroke, the feeding speed of one of the oil cylinders gradually decreases from the target feeding speed to zero, and after the suction stroke is switched to the feeding stroke, the feeding speed of the other oil cylinder gradually increases from zero to the target feeding speed; 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 as claimed in 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 communicated with 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 also includes: a fourth reversing valve, the fourth reversing valve being in communication with the first driving structure of the first distributing valve to control the action 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 disposed 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 disposed 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 one 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 to allow the first distributing valve to communicate with 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: A 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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