Pumping control system, method and device, engineering machinery and medium

Abstract

The invention provides a pumping control system, method and device, engineering machinery and a medium. The system comprises a controller and an oil pump system, the oil pump system comprises a first oil cylinder, a second oil cylinder, a first conveying cylinder connected with the first oil cylinder through a piston rod, a second conveying cylinder connected with the second oil cylinder through a piston rod, and an oil supplementing and draining valve connected with the controller. A rod cavity of the first oil cylinder is communicated with a rod cavity of the second oil cylinder, or a rodless cavity of the first oil cylinder is communicated with a rodless cavity of the second oil cylinder; detection devices connected with the controller are respectively arranged in the first oil cylinder and the second oil cylinder and are used for detecting the positions of piston rods in the first oil cylinder and the second oil cylinder; the controller is used for controlling the oil supplementing and draining valve to supplement oil or drain oil into the first oil cylinder and / or the second oil cylinder according to the detection result of the detection device so as to adjust the stroke of the piston rod in the first oil cylinder and / or the second oil cylinder. According to the method, the stroke of the oil cylinder can be automatically adjusted, and the effect of effectively preventing the phenomenon of cylinder collision or stroke shortening of the oil cylinder is achieved.

Description

Technical Field

[0001] This application relates to the field of control, and particularly to a pumping control system, method, device, construction machinery and medium. Background Art

[0002] Concrete pumps play an important role in construction machinery and are widely used for concrete transportation and pouring in roads, bridges, hydropower, mines, high-rise buildings and national defense projects. The oil pump system is the core part of the concrete pump. Through the reciprocating movement of the piston rod of the hydraulic cylinder, the conveying cylinder and the concrete piston are driven, and in cooperation with the switching of the distribution valve, the conveying cylinder alternately completes suction and pushing of materials from the hopper, so as to realize the continuous operation of concrete suction and pushing.

[0003] However, during the pumping operation, the oil cylinders in the oil pump system will inevitably leak, and the occurrence of oil leakage in the oil cylinders will cause abnormal strokes of the two oil cylinders, and further lead to the phenomenon of cylinder collision or shortened stroke. Therefore, there is an urgent need for a solution that can automatically adjust the stroke of the oil cylinder. Summary of the Invention

[0004] The pumping control system, method, device, construction machinery and medium provided by the embodiments of this application can automatically adjust the stroke of the oil cylinder, so as to effectively prevent the phenomenon of cylinder collision or shortened stroke of the oil cylinder.

[0005] In a first aspect, the embodiments of this application provide a pumping control system, including:

[0006] An oil pump system and a controller;

[0007] Wherein, the oil pump system includes: a first oil cylinder, a second oil cylinder, a first conveying cylinder connected to the first oil cylinder through a piston rod, a second conveying cylinder connected to the second oil cylinder through a piston rod, and a make-up and drain valve connected to the controller;

[0008] The rod chambers of the first oil cylinder and the second oil cylinder are communicated, or the rodless chambers of the first oil cylinder and the second oil cylinder are communicated;

[0009] Detection devices are respectively arranged in the first oil cylinder and the second oil cylinder, and the detection devices are all connected to the controller;

[0010] The detection device is used to detect the positions of the piston rods in the first oil cylinder and the second oil cylinder;

[0011] The controller is used to control the make-up and drain valve to supply oil or drain oil to the first oil cylinder and / or the second oil cylinder according to the detection results of the detection device, so as to adjust the piston rod stroke in the first oil cylinder and / or the second oil cylinder.

[0012] In a possible implementation, the make-up and relief valve includes a make-up and relief oil port, an oil inlet port, and an oil drain port; two one-way valves are provided between the oil pipelines of the first oil cylinder and the second oil cylinder;

[0013] If the oil pump system is a rodless cavity oil inlet system, the make-up and relief oil port communicates with the rod cavity of the first oil cylinder and / or the second oil cylinder, the oil inlet port is connected between the oil pipelines of the first oil cylinder and the second oil cylinder, and the oil drain port communicates with the fuel tank;

[0014] If the oil pump system is a rod cavity oil inlet system, the make-up and relief oil port communicates with the rodless cavity of the first oil cylinder and / or the second oil cylinder, the oil inlet port is connected between the first one-way valve and the second one-way valve, and the oil drain port communicates with the fuel tank.

[0015] When the make-up and relief valve makes up oil to the first oil cylinder and / or the second oil cylinder, the one-way valve on the high-pressure oil side in the oil pipelines of the first oil cylinder and the second oil cylinder is communicated, and the high-pressure oil enters the first oil cylinder and / or the second oil cylinder through the oil inlet port and the make-up and relief oil port of the make-up and relief valve.

[0016] In a possible implementation, the make-up and relief valve is an electro-hydraulic directional valve.

[0017] In a possible implementation, the detection device includes a proximity switch or a displacement sensor.

[0018] In a possible implementation, if the detection device is a proximity switch, a first proximity switch and a second proximity switch are respectively arranged at positions preset lengths away from both ends of the first oil cylinder, and a third proximity switch and a fourth proximity switch are respectively arranged at positions preset lengths away from both ends of the second oil cylinder.

[0019] In a possible implementation, if the detection device is a displacement sensor, a first displacement sensor is arranged inside the first oil cylinder along the moving direction of the piston rod, and a second displacement sensor is arranged inside the second oil cylinder along the moving direction of the piston rod;

[0020] The first displacement sensor is used to detect the displacement of the piston rod in the first oil cylinder, and the second displacement sensor is used to detect the displacement of the piston rod in the second oil cylinder.

[0021] In a possible implementation, the oil pump system further includes a motor and a motor, the pressure relief valve and the motor are respectively electrically connected to the controller, and the motor is used to drive the motor to rotate;

[0022] In a possible implementation, the oil pump system further includes: a pressure relief valve; one end of the pressure relief valve is respectively connected to one end of the motor and the oil delivery pipeline of the first oil cylinder or the oil delivery pipeline of the second oil cylinder, and the other end of the pressure relief valve is respectively connected to the other end of the motor and the oil delivery pipeline of the second oil cylinder or the oil delivery pipeline of the first oil cylinder;

[0023] The controller is used for the detection result of the detection device to control the pressure relief valve to connect the second oil cylinder and the first oil cylinder for pressure relief.

[0024] In a second aspect, an embodiment of the present application provides a pumping control method, which is applied to the controller of the pumping control system described in the first aspect and / or various possible implementations of the first aspect, and includes:

[0025] Obtain the detection results detected by the detection devices in the first oil cylinder and the second oil cylinder in the pumping control system, and the detection results are used to indicate the positions of the piston rods in each oil cylinder;

[0026] According to the detection results, control the make-up and bleed valve in the pumping control system to make up oil or bleed oil to the first oil cylinder and / or the second oil cylinder, so as to adjust the piston rod stroke in the first oil cylinder and / or the second oil cylinder.

[0027] In a possible implementation, if the rod chambers of the first oil cylinder and the second oil cylinder in the pumping control system are connected, then according to the detection results, controlling the make-up and bleed valve in the pumping control system to make up oil or bleed oil to the first oil cylinder and / or the second oil cylinder includes:

[0028] If the detection results indicate that the piston rod in the first oil cylinder extends to a first preset position and the piston rod in the second oil cylinder does not retract to a second preset position, then control the make-up and bleed valve to make up oil to the rod chambers of the first oil cylinder and / or the second oil cylinder;

[0029] If the detection results indicate that the piston rod in the second oil cylinder retracts to the second preset position and the piston rod in the first oil cylinder does not extend to the first preset position, then control the make-up and bleed valve to bleed oil from the rod chambers of the first oil cylinder and / or the second oil cylinder;

[0030] If the detection results indicate that the piston rod in the first oil cylinder retracts to a third preset position and the piston rod in the second oil cylinder does not extend to a fourth preset position, then control the make-up and bleed valve to bleed oil from the rod chambers of the first oil cylinder and / or the second oil cylinder;

[0031] If the detection result indicates that the piston rod in the second oil cylinder extends to the fourth preset position and the piston rod in the first oil cylinder does not retract to the third preset position, then control the make-up and bleed valve to supply oil to the rod chambers in the first oil cylinder and / or the second oil cylinder.

[0032] In a possible implementation manner, if the rodless chambers of the first oil cylinder and the second oil cylinder in the pumping control system are communicated, then according to the detection result, controlling the make-up and bleed valve in the pumping control system to supply or bleed oil to the first oil cylinder and / or the second oil cylinder includes:

[0033] If the detection result indicates that the piston rod in the first oil cylinder extends to the first preset position and the piston rod in the second oil cylinder does not retract to the second preset position, then control the make-up and bleed valve to supply oil to the rodless chambers in the first oil cylinder and / or the second oil cylinder;

[0034] If the detection result indicates that the piston rod in the second oil cylinder retracts to the second preset position and the piston rod in the first oil cylinder does not extend to the first preset position, then control the make-up and bleed valve to bleed oil from the rodless chambers in the first oil cylinder and / or the second oil cylinder;

[0035] If the detection result indicates that the piston rod in the first oil cylinder retracts to the third preset position and the piston rod in the second oil cylinder does not extend to the fourth preset position, then control the make-up and bleed valve to bleed oil from the rodless chambers in the first oil cylinder and / or the second oil cylinder;

[0036] If the detection result indicates that the piston rod in the second oil cylinder extends to the fourth preset position and the piston rod in the first oil cylinder does not retract to the third preset position, then control the make-up and bleed valve to supply oil to the rodless chambers in the first oil cylinder and / or the second oil cylinder.

[0037] In a possible implementation manner, the method further includes:

[0038] When the detection result indicates that the piston rod in the first oil cylinder reaches the first preset position and / or the piston rod in the second oil cylinder reaches the second preset position, or when the detection result indicates that the piston rod in the first oil cylinder reaches the third preset position and / or the piston rod in the second oil cylinder reaches the fourth preset position, control the motor in the pumping control system to reverse;

[0039] And / or,

[0040] When the detection result indicates that the piston rod in the first oil cylinder reaches the first preset position, and / or the piston rod in the second oil cylinder reaches the second preset position, or when the detection result indicates that the piston rod in the first oil cylinder reaches the third preset position, and / or the piston rod in the second oil cylinder reaches the fourth preset position, control the pressure relief valve in the pumping control system to relieve pressure on the first oil cylinder and the second oil cylinder.

[0041] In a third aspect, an embodiment of the present application provides a pumping control device, including:

[0042] An acquisition unit configured to acquire the detection results detected by the detection devices in the first oil cylinder and the second oil cylinder in the pumping control system, where the detection results are used to indicate the positions of the piston rods in each oil cylinder;

[0043] A control unit configured to, according to the detection results, control the oil filling and draining valve in the pumping control system to fill oil or drain oil into and / or from the first oil cylinder and / or the second oil cylinder, so as to adjust the piston rod stroke in the first oil cylinder and / or the second oil cylinder.

[0044] In a possible implementation manner, if the rod chambers of the first oil cylinder and the second oil cylinder in the pumping control system are communicated, the control unit is specifically configured to:

[0045] If the detection result indicates that the piston rod in the first oil cylinder extends to the first preset position and the piston rod in the second oil cylinder does not retract to the second preset position, then control the oil filling and draining valve to fill oil into the rod chambers of the first oil cylinder and / or the second oil cylinder;

[0046] If the detection result indicates that the piston rod in the second oil cylinder retracts to the second preset position and the piston rod in the first oil cylinder does not extend to the first preset position, then control the oil filling and draining valve to drain oil from the rod chambers of the first oil cylinder and / or the second oil cylinder;

[0047] If the detection result indicates that the piston rod in the first oil cylinder retracts to the third preset position and the piston rod in the second oil cylinder does not extend to the fourth preset position, then control the oil filling and draining valve to drain oil from the rod chambers of the first oil cylinder and / or the second oil cylinder;

[0048] If the detection result indicates that the piston rod in the second oil cylinder extends to the fourth preset position and the piston rod in the first oil cylinder does not retract to the third preset position, then control the oil filling and draining valve to fill oil into the rod chambers of the first oil cylinder and / or the second oil cylinder;

[0049] In a possible implementation, if the rodless chambers of the first oil cylinder and the second oil cylinder in the pumping control system are connected, the control unit is specifically configured to:

[0050] If the detection result indicates that the piston rod in the first oil cylinder extends to a first preset position and the piston rod in the second oil cylinder does not retract to a second preset position, control the make-up and bleed valve to supply oil to the rodless chambers of the first oil cylinder and / or the second oil cylinder;

[0051] If the detection result indicates that the piston rod in the second oil cylinder retracts to the second preset position and the piston rod in the first oil cylinder does not extend to the first preset position, control the make-up and bleed valve to bleed oil from the rodless chambers of the first oil cylinder and / or the second oil cylinder;

[0052] If the detection result indicates that the piston rod in the first oil cylinder retracts to a third preset position and the piston rod in the second oil cylinder does not extend to a fourth preset position, control the make-up and bleed valve to bleed oil from the rodless chambers of the first oil cylinder and / or the second oil cylinder;

[0053] If the detection result indicates that the piston rod in the second oil cylinder extends to the fourth preset position and the piston rod in the first oil cylinder does not retract to the third preset position, control the make-up and bleed valve to supply oil to the rodless chambers of the first oil cylinder and / or the second oil cylinder.

[0054] In a possible implementation, the pumping control device further includes:

[0055] When the detection result indicates that the piston rod in the first oil cylinder reaches the first preset position and / or the piston rod in the second oil cylinder reaches the second preset position, or when the detection result indicates that the piston rod in the first oil cylinder reaches the third preset position and / or the piston rod in the second oil cylinder reaches the fourth preset position, control the motor in the pumping control system to reverse;

[0056] And / or,

[0057] When the detection result indicates that the piston rod in the first oil cylinder reaches the first preset position and / or the piston rod in the second oil cylinder reaches the second preset position, or when the detection result indicates that the piston rod in the first oil cylinder reaches the third preset position and / or the piston rod in the second oil cylinder reaches the fourth preset position, control the pressure relief valve in the pumping control system to relieve pressure on the first oil cylinder and the second oil cylinder.

[0058] In a fourth aspect, an embodiment of the present application provides a controller, including: a memory, a processor;

[0059] The memory stores computer-executable instructions;

[0060] The processor executes the computer-executable instructions stored in the memory, such that the processor executes the various possible implementation manners of the above two aspects and / or the second aspect.

[0061] In a fifth aspect, an embodiment of the present application provides a construction machinery, in which a pumping control system as described in the above first aspect and / or various possible implementation manners of the first aspect is provided.

[0062] In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium, in which computer-executable instructions are stored, and when the computer-executable instructions are executed by a processor, they are used to implement the various possible implementation manners of the above second aspect and / or the second aspect.

[0063] In a seventh aspect, an embodiment of the present application provides a computer program product, including a computer program, which when executed by a processor, implements the various possible implementation manners of the above second aspect and / or the second aspect.

[0064] The pumping control system, method, device, construction machinery and medium provided by the embodiments of the present application are provided. By providing a make-up and bleed valve connected to a controller in an oil pump system, and respectively providing detection devices connected to the controller in a first oil cylinder and a second oil cylinder of the oil pump system for detecting the positions of the piston rods in the first oil cylinder and the second oil cylinder. The controller can control the make-up and bleed valve to supply oil or drain oil to the first oil cylinder and / or the second oil cylinder according to the detection results of the detection devices, so as to adjust the piston rod strokes in the first oil cylinder and / or the second oil cylinder. This method enables the oil pump system to automatically adjust the cylinder stroke, so as to effectively prevent the phenomenon of cylinder collision or shortened stroke. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] The accompanying drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0066] Figure 1 It is a schematic structural diagram of a common oil pump system;

[0067] Figure 2 It is one of the schematic structural diagrams of the oil pump system provided in Embodiment 1 of the present application;

[0068] Figure 3 It is another schematic structural diagram of the oil pump system provided in Embodiment 1 of the present application;

[0069] Figure 4 It is one of the schematic diagrams of the installation manner of the detection device provided in Embodiment 2 of the present application;

[0070] Figure 5 Schematic diagram II of the installation method of the detection device provided for the second embodiment of the present application;

[0071] Figure 6 Specific structural schematic diagram of the pumping control system provided for the third embodiment of the present application;

[0072] Figure 7 Schematic flow diagram of a pumping control method provided for the fourth embodiment of the present application;

[0073] Figure 8 Structural schematic diagram of the pumping control device provided for the sixth embodiment of the present application;

[0074] Figure 9 Structural schematic diagram of the pumping control device provided for the seventh embodiment of the present application;

[0075] Figure 10 Structural schematic diagram of the controller provided for the present application.

[0076] Explanation of reference numerals: 10 - oil pump system; 101 - first oil cylinder; 102 - second oil cylinder; 103 - first delivery cylinder; 104 - second delivery cylinder; 105 - charge and drain valve; 1051 - charge and drain port; 1052 - inlet port; 1053 - outlet port; 106 - detection device; 1061 - first proximity switch; 1062 - second proximity switch; 1063 - third proximity switch; 1064 - fourth proximity switch; 1065 - first displacement sensor; 1066 - second displacement sensor; 1071 - oil delivery pipeline of the first oil cylinder; 1072 - oil delivery pipeline of the second oil cylinder; 108 - fuel tank; 1091 - first check valve; 1092 - second check valve; 110 - motor; 111 - motor; 112 - pressure relief valve; 113 - makeup oil pump; 114 - overflow valve; 1151 - first safety valve; 1152 - second safety valve; 1161 - third check valve; 1164 - fourth check valve; 20 - controller.

[0077] Through the above-mentioned drawings, specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and text descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed Description of the Invention

[0078] Exemplary embodiments will be described in detail herein, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0079] Figure 1 FIG. 4 is a schematic structural diagram of a commonly used oil pump system 10. For the convenience of understanding the present solution, hereinafter, taking the rodless cavity oil inlet system as an example, in combination with Figure 1 the pumping process of the oil pump system 10 will be introduced:

[0080] When the first oil cylinder 101 is in the extended working condition, hydraulic oil flows into the rodless cavity of the first oil cylinder 101, so that the piston rod in the first oil cylinder 101 extends, realizing the pushing of the transported material in the first conveying cylinder 103. At the same time, the hydraulic oil in the rod cavity of the first oil cylinder 101 will enter the rod cavity of the second oil cylinder 102 through the channel between the first oil cylinder 101 and the second oil cylinder 102, so that the piston rod in the second oil cylinder 102 retracts, realizing the suction of the transported material in the second conveying cylinder 104. At the same time, the hydraulic oil in the rodless cavity of the second oil cylinder 102 flows out;

[0081] When the second oil cylinder 102 is in the extended working condition, hydraulic oil flows into the rodless cavity of the second oil cylinder 102, so that the piston rod in the second oil cylinder 102 extends, realizing the pushing of the transported material in the second conveying cylinder 104. At the same time, the hydraulic oil in the rod cavity of the first oil cylinder 101 will enter the rod cavity of the first oil cylinder 101 through the channel between the first oil cylinder 101 and the second oil cylinder 101, so that the piston rod in the first oil cylinder 101 retracts, realizing the suction of the transported material in the first conveying cylinder 103. At the same time, the hydraulic oil in the rodless cavity of the first oil cylinder 101 flows out.

[0082] During the pumping process, the above two working conditions alternate and cycle to realize the continuous pumping of the oil pump system 10.

[0083] Next, the problems in the background art will be introduced in detail in combination with the above pumping process. Taking the first oil cylinder 101 in the extended working condition as an example, when the piston rod in the first oil cylinder 101 extends, if there is relatively more oil in the rod cavities of the first oil cylinder 101 and the second oil cylinder 101, there will be a risk of piston hitting the cylinder in the second oil cylinder 102; if there is relatively less oil in the rod cavities of the first oil cylinder 101 and the second oil cylinder 102, the working stroke of the second oil cylinder 102 will become shorter, the conveying volume of the transported material will decrease, and the overall working efficiency of the oil pump system 10 will be affected.

[0084] In view of the above technical problems, when the inventor was researching the pumping control method, it was found that by respectively arranging position detection devices on two oil cylinders of an oil pump system to obtain the positions of the piston rods in the two oil cylinders during the pumping operation to detect the oil cylinder stroke, and arranging a make-up and bleed valve in the oil pump system to perform a make-up or bleed operation on the oil cylinder when it is determined that the oil cylinder stroke is abnormal based on the detection result of the detection device, so as to adjust the stroke of the oil cylinder, effectively prevent the problem of shortened service life of the oil cylinder caused by the cylinder collision phenomenon of the oil cylinder, and effectively prevent the problem of reduced pumping efficiency caused by the shortened stroke phenomenon of the oil cylinder. The following uses specific embodiments to detail the technical solution of the present application and how the technical solution of the present application solves the above technical problems. These several specific embodiments below can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below with reference to the drawings.

[0085] Embodiment 1 of the present application provides a pumping control system, including: an oil pump system and a controller.

[0086] Specifically, the oil pump system includes: a first oil cylinder, a second oil cylinder, a first conveying cylinder connected to the first oil cylinder through a piston rod, a second conveying cylinder connected to the second oil cylinder through a piston rod, and a make-up and bleed valve connected to the controller; the rod chambers of the first oil cylinder and the second oil cylinder are communicated, or the rodless chambers of the first oil cylinder and the second oil cylinder are communicated; detection devices are respectively arranged in the first oil cylinder and the second oil cylinder, and the detection devices are both connected to the controller.

[0087] Among them, the detection device is used to detect the positions of the piston rods in the first oil cylinder and the second oil cylinder; the controller is used to control the make-up and bleed valve to make up or bleed oil to the first oil cylinder and / or the second oil cylinder according to the detection result of the detection device, so as to adjust the piston rod stroke in the first oil cylinder and / or the second oil cylinder.

[0088] It should be understood that in this solution, two detection devices are used to detect the positions of the piston rods in the two oil cylinders. During continuous pumping, if the controller determines that the movement strokes of the two piston rods are abnormal based on the detection results of the detection devices, it means that there is oil leakage in the first oil cylinder and / or the second oil cylinder. Therefore, by controlling the make-up and bleed valve by the controller to perform a make-up or bleed operation on the first oil cylinder and / or the second oil cylinder, the adjustment of the piston rod stroke in the first oil cylinder and / or the second oil cylinder can be realized.

[0089] It is worth noting that in practical applications, common oil pump systems include a rod chamber oil inlet system and a rodless chamber oil inlet system. When the oil pump system is a rodless chamber oil inlet system, the rod chambers of the first oil cylinder and the second oil cylinder are communicated; when the oil pump system is a rod chamber oil inlet system, the rodless chambers of the first oil cylinder and the second oil cylinder are communicated.

[0090] In the specific implementation of the solution, the purpose of the make-up and bleed valve in this application to supply oil or bleed oil to the first oil cylinder and / or the second oil cylinder is to adjust the stroke of the piston in the oil cylinder. Regarding the specific ways of supplying oil and bleeding oil for the make-up and bleed valve, this application does not limit it.

[0091] Exemplarily, the make-up and bleed port of the make-up and bleed valve is communicated with the rod chamber (or rodless chamber) of the first oil cylinder and / or the second oil cylinder, the oil supply port and the oil discharge port are communicated with the rodless chamber (or rod chamber) of the first oil cylinder and / or the second oil cylinder, and oil is supplied or bled to the rod chamber (or rodless chamber) of the first oil cylinder and / or the second oil cylinder through the rodless chamber (or rod chamber) of the first oil cylinder and / or the second oil cylinder it is communicated with;

[0092] Or, for example, the make-up and bleed port of the make-up and bleed valve is communicated with the rod chamber (or rodless chamber) of the first oil cylinder and / or the second oil cylinder, the oil discharge port is communicated with the fuel tank, the oil inlet port is communicated with the rodless chamber (or rod chamber) of the first oil cylinder and / or the second oil cylinder, and oil is supplied or bled to the rod chamber (or rodless chamber) of the first oil cylinder and / or the second oil cylinder through the fuel tank and the rodless chamber (or rod chamber) of the first oil cylinder and / or the second oil cylinder it is communicated with in cooperation.

[0093] In addition, it is worth noting that in order to prevent excessive adjustment of the stroke of the piston rod in the first oil cylinder and / or the second oil cylinder, it is necessary to control the amount of oil supplied or bled in the first oil cylinder and / or the second oil cylinder. When controlling the make-up and bleed valve to supply oil or bleed oil to the first oil cylinder and / or the second oil cylinder in this application, only fine-tuning of the oil in the first oil cylinder and / or the second oil cylinder is performed. Exemplarily, fine-tuning of the oil in the first oil cylinder and / or the second oil cylinder can be achieved by controlling the time of oil supply and oil bleeding. For example, when the commutation working condition ends, the controller stops controlling the make-up and bleed valve until the next commutation working condition is reached, and when it is determined that oil needs to be supplied or bled to the first oil cylinder and / or the second oil cylinder, the controller will control the make-up and bleed valve again.

[0094] Further, in some specific implementation manners, Figure 2 and Figure 3 are both schematic structural diagrams of the oil pump system provided in the first embodiment of this application. Among them, Figure 2 shows the structure of the rodless chamber oil inlet system; Figure 3 shows the structure of the rod chamber oil inlet system. The make-up and bleed valve 105 includes a make-up and bleed port 1051, an oil inlet port 1052, and an oil discharge port 1053. There are two one-way valves provided between the oil delivery pipeline 1071 of the first oil cylinder and the oil delivery pipeline 1072 of the second oil cylinder, namely the first one-way valve 1091 and the second one-way valve 10952.

[0095] Next, it will be combined with Figure 2 and Figure 3, in the pumping control system provided in this embodiment, the specific structure in the oil pump system will be described in detail as follows:

[0096] When the oil pump system is a rodless cavity oil pump system, as Figure 2 shown, the oil pump system provided in this application includes: a first oil cylinder 101, a second oil cylinder 102, a first delivery cylinder 103 connected to the first oil cylinder 101 through a piston rod, a second delivery cylinder 104 connected to the second oil cylinder 102 through a piston rod, and a make-up and drain valve 105; the rodless cavities of the first oil cylinder 101 and the second oil cylinder 102 are communicated; detection devices 106 are respectively arranged in the first oil cylinder 101 and the second oil cylinder 102, and each detection device 106 is used to detect the positions of the piston rods in the first oil cylinder 101 and the second oil cylinder 102.

[0097] Among them, the make-up and drain port 1051 of the make-up and drain valve 105 is communicated with the rodless cavity of the first oil cylinder 101 and / or the second oil cylinder 102, the oil inlet 1052 is connected between a first check valve 1091 and a second check valve 1092, and the drain port 1053 is communicated with the oil tank 102.

[0098] In the specific implementation of the solution, please continue to refer to Figure 2 , when the controller needs to control the make-up and drain valve 105 to make up oil to the rodless cavity of the first oil cylinder 101 and / or the second oil cylinder 102, the oil inlet 1052 and the make-up and drain port 1051 of the make-up and drain valve 105 will be opened, and the drain port 1053 will be kept in a closed state. The check valves 109 on the high-pressure oil side in the oil delivery pipelines 1071 of the first oil cylinder and the oil delivery pipelines 1072 of the second oil cylinder are communicated, so that the oil in the oil cylinder with high-pressure oil in the rodless cavity of the first oil cylinder or the second oil cylinder flows through the oil inlet 1052 and the make-up and drain port 1051 of the make-up and drain valve 105 to the rodless cavity of the first oil cylinder 101 and / or the second oil cylinder 102, realizing the make-up oil to the rodless cavity of the first oil cylinder 101 and / or the second oil cylinder 102; when the controller 20 needs to control the make-up and drain valve to drain the rodless cavity of the first oil cylinder 101 and / or the second oil cylinder 102, the make-up and drain port 1051 and the drain port 1053 of the make-up and drain valve will be opened, and the oil inlet 1052 will be kept in a closed state, so that the oil in the rodless cavity of the first oil cylinder 101 and / or the second oil cylinder 102 flows to the oil tank 108, realizing the drainage of the rodless cavity of the first oil cylinder 101 and / or the second oil cylinder 102. When the oil pump system is a rod cavity oil pump system, as Figure 3As shown in the figure, the oil pump system 10 provided by the present application includes: a first oil cylinder 101, a second oil cylinder 102, a first delivery cylinder 103 connected to the first oil cylinder 101 through a piston rod, a second delivery cylinder 104 connected to the second oil cylinder 102 through a piston rod, and a make-up and drain valve 105; the rodless chambers of the first oil cylinder 101 and the second oil cylinder 102 are communicated; detection devices 106 are respectively arranged in the first oil cylinder 101 and the second oil cylinder 102, and each detection device 106 is used to detect the positions of the piston rods in the first oil cylinder 101 and the second oil cylinder 102.

[0099] Among them, the make-up and drain port 1051 of the make-up and drain valve 105 is communicated with the rodless chambers of the first oil cylinder 101 and the second oil cylinder 102, the oil inlet port 1052 is connected between a first one-way valve 1091 and a second one-way valve 1092, and the drain port 1053 is communicated with the fuel tank 108.

[0100] In the specific implementation of the solution, please continue to refer to Figure 3 , when the controller needs to control the make-up and drain valve 105 to supply oil to the rodless chambers of the first oil cylinder 101 and / or the second oil cylinder 102, the make-up and drain port 1051 and the oil inlet port 1052 of the make-up and drain valve 105 will be opened, the drain port 1053 will be kept in a closed state, and the one-way valves 109 on the high-pressure oil side in the oil delivery pipeline 1071 of the first oil cylinder and the oil delivery pipeline 1072 of the second oil cylinder will be communicated, so that the oil in the oil cylinder with high-pressure oil in the rod chamber of the first oil cylinder or the second oil cylinder will flow through the oil inlet port 1052 and the make-up and drain port 1051 of the make-up and drain valve 105 to the rodless chambers 102 of the first oil cylinder 101 and / or the second oil cylinder 102, realizing the oil supply to the rodless chambers of the first oil cylinder 101 and / or the second oil cylinder 102; when the controller 20 needs to control the make-up and drain valve 105 to drain the oil from the rodless chambers of the first oil cylinder 101 and / or the second oil cylinder 102, the make-up and drain port 1051 and the drain port 1053 of the make-up and drain valve 105 will be opened, the oil inlet port 1052 will be kept in a closed state, so that the oil in the rodless chambers of the first oil cylinder make-up and drain port 101 and / or the second oil cylinder 102 will flow to the fuel tank 108, realizing the drainage of the oil from the rodless chambers of the first oil cylinder 101 and / or the second oil cylinder 102.

[0101] It should be understood that since the rod chambers of the first oil cylinder and the second oil cylinder of the rodless chamber oil supply system are communicated, when supplying oil or draining oil to the rod chamber of the first oil cylinder or the second oil cylinder, it is equivalent to supplying oil or draining oil to the rod chambers of the first oil cylinder and the second oil cylinder at the same time; since the rodless chambers of the first oil cylinder and the second oil cylinder of the rod chamber oil supply system are communicated, when supplying oil or draining oil to the rodless chamber of the first oil cylinder or the second oil cylinder, it is equivalent to supplying oil or draining oil to the rodless chambers of the first oil cylinder and the second oil cylinder at the same time.

[0102] It should be noted that both the first one-way valve 1091 and the second one-way valve 1192 are control valves that allow hydraulic oil to flow freely in one direction while preventing it from flowing in the opposite direction. Among them, based on the setting of the first one-way valve 1091 and the second one-way valve 1092 between the oil pipeline 1071 and the oil pipeline 1072 of the second oil cylinder, when the control compensation and drainage valve 105 supplies oil to the rod chamber of the first oil cylinder 101 and / or the second oil cylinder 102, the high-pressure oil can smoothly flow to the rodless chamber (or rod chamber) of the oil cylinder 101 and / or the second oil cylinder.

[0103] In this embodiment, based on the specific connection methods of the compensation and drainage valve in the above two oil pump systems (rod chamber oil inlet system and rod chamber oil inlet system), the controller can control the compensation and drainage valve to supply oil or drain oil to the first oil cylinder and the second oil cylinder, so as to adjust the stroke of the piston rod in the first oil cylinder and the second oil cylinder.

[0104] In addition, it is worth noting that when the compensation and drainage valve is not controlled by the controller, its compensation and drainage ports, oil inlet port, and oil drain port are all in a closed state.

[0105] In a specific implementation manner, the compensation and drainage valve 105 can be an electro-hydraulic directional valve. This electro-hydraulic directional valve opens and closes its compensation and drainage ports, oil inlet port, and oil drain port according to the control signal of the controller.

[0106] The pumping control system provided in this embodiment, by setting a compensation and drainage valve connected to the controller in the oil pump system, and respectively setting detection devices connected to the controller in the first oil cylinder and the second oil cylinder of the oil pump system, for detecting the positions of the piston rods in the first oil cylinder and the second oil cylinder. So that the controller can control the compensation and drainage valve to supply oil or drain oil to the first oil cylinder and / or the second oil cylinder according to the detection results of the detection device, so as to adjust the stroke of the piston rod in the first oil cylinder and / or the second oil cylinder. This method enables the oil pump system to automatically adjust the oil cylinder stroke, so as to effectively prevent the phenomenon of the oil cylinder hitting the cylinder head or the stroke becoming shorter. In addition, this embodiment also gives the specific connection methods of the compensation and drainage valve in the rodless chamber oil inlet system and the rod chamber oil inlet system. Based on this connection method, the controller can control the compensation and drainage valve to supply oil or drain oil to the first oil cylinder and the second oil cylinder, so as to adjust the stroke of the piston rods in the first oil cylinder and the second oil cylinder.

[0107] Figure 4 and Figure 5 Both are schematic diagrams of the installation methods of the detection devices provided in the second embodiment of the present application. In this embodiment, the detection device in the pumping control system in the above embodiment is a proximity switch or a displacement sensor. On the basis of the above embodiment, in the pumping control system provided in the second embodiment of the present application, the installation methods of the proximity switch or the displacement sensor are also given, and the specific content is as follows:

[0108] Figure 4 When the detection device is a proximity switch, the specific installation method of the proximity switch is shown. Please refer to Figure 4 , if the detection device 106 is a proximity switch, a first proximity switch 1061 and a second proximity switch 1062 are respectively arranged at positions preset lengths away from both ends of the first oil cylinder 101, and a third proximity switch 1063 and a fourth proximity switch 1064 are respectively arranged at positions preset lengths away from both ends of the second oil cylinder 102.

[0109] It should be understood that if the proximity switch is used as the detection device, when the piston rod reaches the position where the proximity switch is located, the proximity switch will send a detection result to the controller, and this detection result will indicate that the piston rod is in place.

[0110] Among them, the preset length is set according to the length of the oil cylinder. Since the purpose of setting the proximity switch is to detect whether the piston rod extends / retracts in place, the position of the proximity switch should be close to both ends of the oil cylinder. The present application does not limit the specific value of the preset length.

[0111] Please continue to refer to Figure 4 , the following describes how the controller supplements or drains oil from the first oil cylinder and / or the second oil cylinder according to the detection results of the proximity switch:

[0112] If the first oil cylinder 101 is in the extended working condition, the controller 20 can judge whether it is necessary to supplement or drain oil from the first oil cylinder 101 and / or the second oil cylinder 102 according to the first proximity switch 1061 and the fourth proximity switch 1064. Specifically, if the piston rod in the first oil cylinder 101 extends to the first proximity switch 1061 while the piston rod in the second oil cylinder 102 retracts to the fourth proximity switch 1064, it indicates that the strokes of the piston rods in the first oil cylinder 101 and the second oil cylinder 102 are normal, and at this time, there is no need to judge whether to supplement or drain oil from the first oil cylinder 101 and / or the second oil cylinder 102; otherwise, it indicates that the strokes of the piston rods in the first oil cylinder 101 and the second oil cylinder 102 are abnormal, and at this time, it is necessary to supplement or drain oil from the first oil cylinder and / or the second oil cylinder.

[0113] Furthermore, according to the sequence of the piston rod in the first oil cylinder 101 extending to the first proximity switch 1061 and the piston rod in the second oil cylinder 102 retracting to the fourth proximity switch 1064, it can be judged whether it is necessary to supplement oil to the first oil cylinder 101 and / or the second oil cylinder 102 or drain oil from the first oil cylinder 101 and / or the second oil cylinder 102.

[0114] If the second oil cylinder 102 is in the extended working condition, it can be judged whether it is necessary to supplement or drain oil from the first oil cylinder 101 and / or the second oil cylinder 102 according to the third proximity switch 1063 and the fourth proximity switch 1064. The specific implementation process is similar to that when the first oil cylinder 102 is in the extended working condition, and will not be elaborated here.

[0115] Exemplarily, taking the first oil cylinder in the extended working condition as an example, if the piston rod in the first oil cylinder extends to the first proximity switch while the piston rod in the second oil cylinder retracts to the fourth proximity switch, the detection result may include: the signals of the first proximity switch and the fourth proximity switch are 1, and the signals of the second proximity switch and the third proximity switch are 0; if the piston rod in the first oil cylinder extends to the first proximity switch while the piston rod in the second oil cylinder does not retract to the fourth proximity switch, the detection result may include: the signal of the first proximity switch is 1, and the signals of the second proximity switch, the third proximity switch, and the fourth proximity switch are 0.

[0116] Figure 5 When the detection device is a displacement sensor, for the specific installation method of the displacement sensor, please refer to Figure 5 , if the detection device 106 is a displacement sensor, a first displacement sensor 1065 is arranged inside the first oil cylinder 101 along the moving direction of the piston rod, and a second displacement sensor 1066 is arranged inside the second oil cylinder along the moving direction of the piston rod; wherein, the first displacement sensor 1065 is used to detect the displacement of the piston rod in the first oil cylinder, and the second displacement sensor is used to detect the displacement of the piston rod in the second oil cylinder.

[0117] It should be understood that if the displacement sensor is used as the detection device, the detection result can be the displacement collected by the displacement sensor. The controller can judge whether the piston rod is in place based on the preset displacement and the actual displacement of the piston rod. Among them, the design principle of the preset displacement is similar to the design principle of the preset length when the proximity switch is used as the detection device, and will not be elaborated here.

[0118] The pumping control system provided in this embodiment gives the specific installation method of the detection device. Based on this connection method, the controller can judge whether the strokes of the piston rods in the first oil cylinder and the second oil cylinder are abnormal according to the detection results of the detection device, and when the strokes of the piston rods are abnormal, it can determine whether to replenish oil or drain oil to the first oil cylinder and / or the second oil cylinder according to the sequence of the piston rods in the first oil cylinder and the second oil cylinder in place indicated in the detection results, so as to realize the adjustment of the strokes of the piston rods in the first oil cylinder and the second oil cylinder.

[0119] Figure 6 This is a specific structural schematic diagram of the pumping control system provided in the third embodiment of the present application. In this embodiment, the oil pump system is a rodless cavity oil inlet system, the detection device is a proximity switch, and the oil replenishing / draining valve is an electronic commutator, as shown in Figure 6As shown in the figure, the pumping control system provided in this embodiment includes: a controller 20, a first oil cylinder 101, a second oil cylinder 102, a first delivery cylinder 103, a second delivery cylinder 104, a make-up and bleed valve 105 (including a make-up and bleed port 1051, an oil inlet 1052, and an oil drain port 1053), a first proximity switch 1061, a second proximity switch 1062, a third proximity switch 1063, a fourth proximity switch 1064, an oil delivery pipeline 1071 of the first oil cylinder, an oil delivery pipeline 1072 of the second oil cylinder, an oil tank 108, a first one-way valve 1091, a second one-way valve 1092, a motor 110, a motor 111, a pressure relief valve 112, a make-up oil pump 113, a relief valve 114, a first safety valve 1151, a second safety valve 1152, a third one-way valve 1161, and a fourth one-way valve 1162.

[0120] Among them, the first oil cylinder 101 is connected to the first delivery cylinder 103 through a piston rod, and the second oil cylinder 102 is connected to the second delivery cylinder 104 through a piston rod; the rodless chambers of the first oil cylinder 101 and the second oil cylinder 102 are connected;

[0121] A first one-way valve 1091 and a second one-way valve 1092 are arranged between the oil delivery pipeline 1071 of the first oil cylinder and the oil delivery pipeline 1072 of the second oil cylinder; the make-up and bleed port 1051 of the make-up and bleed valve 105 is communicated with the rodless chamber of the first oil cylinder 101, the oil inlet 1052 of the make-up and bleed valve 105 is connected between the first one-way valve 1091 and the second one-way valve 1092, and the oil drain port 1053 of the make-up and bleed valve 105 is communicated with the oil tank 108; the make-up and bleed valve 105 is electrically connected to the controller 20 (not shown in the figure);

[0122] A first proximity switch 1061 and a second proximity switch 1062 are respectively arranged at positions with a preset length from both ends of the first oil cylinder 101, and a third proximity switch 1063 and a fourth proximity switch 1064 are respectively arranged at positions with a preset length from both ends of the second oil cylinder 102; the first proximity switch 1061, the third proximity switch 1062, the second proximity switch 1063, and the fourth proximity switch 1064 are all electrically connected to the controller 20 (not shown in the figure);

[0123] One end of the pressure relief valve 112 is respectively connected to one end of the motor 111 and the oil delivery pipeline of the first oil cylinder, and the other end of the pressure relief valve 112 is respectively connected to the other end of the motor 111 and the oil delivery pipeline of the second oil cylinder; the pressure relief valve 112 and the motor 110 are respectively electrically connected to the controller 20 (not shown in the figure);

[0124] One end of the make-up oil pump 113 is connected to the oil delivery pipeline of the first oil cylinder through a third one-way valve 1161, and is connected to the oil delivery pipeline of the second oil cylinder through a fourth one-way valve 1162, and the other end of the make-up oil pump 113 is communicated with the oil tank 108;

[0125] One end of the overflow valve 114 is connected to the pipeline between the makeup oil pump 113, the third one-way valve 1161 and the fourth one-way valve 1162, and the other end of the overflow valve 114 communicates with the fuel tank;

[0126] A first safety valve 1151 is provided between the oil delivery pipeline of the first oil cylinder 101 and the makeup oil pump 113, and a second safety valve 1152 is provided between the oil delivery pipeline of the second oil cylinder 102 and the makeup oil pump 113.

[0127] In this embodiment, both the third one-way valve 1161 and the fourth one-way valve 1162 are control valves that allow hydraulic oil to flow freely in one direction and prevent it from flowing in the opposite direction. The purpose of setting the third one-way valve 1161 and the fourth one-way valve 1162 is to only allow the hydraulic oil in the makeup oil pump 113 to flow into the system and not allow the oil in the system to flow back to the makeup oil pump, thereby effectively ensuring the stable operation of the system.

[0128] In practical applications, the fuel tank 108 connected to the above-mentioned makeup oil pump 113, the fuel tank 108 connected to the overflow valve 114, and the fuel tank 108 connected to the drain port of the makeup and drain valve can be independent of each other or can be used in cooperation. Exemplarily, the above three fuel tanks can be the same fuel tank; or, the fuel tank connected to the makeup oil pump and the fuel tank connected to the overflow valve are the same fuel tank, and the fuel tank connected to the drain port of the makeup and drain valve is a fuel tank, etc. This application does not limit whether the fuel tanks are independent and how they are used in cooperation, and the setting of the fuel tanks is not limited to the above-listed situations.

[0129] Further, the first proximity switch 1061 and the second proximity switch 1062 are used to detect the position of the piston rod in the first oil cylinder 101, and the third proximity switch 1063 and the fourth proximity switch 1064 are used to detect the position of the piston rod in the second oil cylinder 102;

[0130] The controller 20 is used to control the makeup and drain valve 105 to supply oil or drain oil to the rod chamber of the second oil cylinder 102 according to the detection results of the first proximity switch 1061, the second proximity switch 1062, the third proximity switch 1063 and the fourth proximity switch 1064, so as to adjust the piston rod stroke in the first oil cylinder 101 and / or the second oil cylinder 102;

[0131] If any one of the first proximity switch 1061, the second proximity switch 1062, the third proximity switch 1063 or the fourth proximity switch 1064 detects that the piston rod reaches the position set by the proximity switch, the proximity switch sends a in-place signal (i.e., the detection result) to the controller 20 to indicate that the piston rod extends or retracts in place.

[0132] The controller 20 is further configured to control the pressure relief valve 112 to connect the second oil cylinder 102 and the first oil cylinder 101 for pressure relief according to the detection results of the first proximity switch 1061, the second proximity switch 1062, the third proximity switch 1063, and the fourth proximity switch 1064. Specifically, when the detection results indicate that the piston rod in the first oil cylinder reaches the first preset position and / or the piston rod in the second oil cylinder reaches the second preset position, or when the detection results indicate that the piston rod in the first oil cylinder reaches the third preset position and / or the piston rod in the second oil cylinder reaches the fourth preset position, the pressure relief valve in the pumping control system is controlled to relieve pressure on the first oil cylinder and the second oil cylinder. It should be understood that in practical applications, to ensure the timeliness of pressure relief, the controller can control the pressure relief valve to relieve pressure on the first oil cylinder and the second oil cylinder after receiving the first in-place signal. It is worth noting that the setting of the pressure relief valve enables pressure relief on the first oil cylinder and the second oil cylinder when the oil pump system changes direction, so as to buffer the movement of the piston rod in the oil cylinder and effectively prevent the phenomenon of cylinder collision;

[0133] When the make-up and drain valve 105 supplies oil to the rod chamber of the second oil cylinder 102, the make-up and drain port 1051 and the oil inlet port 1052 of the make-up and drain valve 105 are opened, and the first one-way valve 1091 or the second one-way valve 1092 on the high-pressure oil side in the oil delivery pipeline 1071 of the first oil cylinder and the oil delivery pipeline 1072 of the second oil cylinder is connected. The high-pressure oil enters the rod chamber of the second oil cylinder 102 through the oil inlet port 1052 and the make-up and drain port 1051 of the make-up and drain valve 105; when the make-up and drain valve 105 drains oil from the rod chamber of the second oil cylinder 102, the make-up and drain port 1051 and the drain port 1053 of the make-up and drain valve 105 are opened, and the oil in the rod chamber of the second oil cylinder 102 enters the fuel tank 108 through the make-up and drain port 1051 and the drain port 1053 of the make-up and drain valve 105;

[0134] The motor 110 is used to drive the motor 111 to rotate; specifically, the controller 20 drives the motor 111 by controlling the rotation speed and direction of the motor 110 to achieve the control of the pumping speed and direction of the first oil cylinder 102 and the second oil cylinder 102;

[0135] The first safety valve 1151 and the second safety valve 1152 are used to limit the maximum pressure of the oil pump system to be less than the preset pressure value; among them, different oil pump systems are set with different preset pressure values, such as 20 MPa, 25 MPa, 30 MPa, etc., and the present application does not limit the selection of the preset pressure value;

[0136] The make-up oil pump 113 is used to supply oil to the oil pump system to ensure the oil suction pressure for the high-speed rotation of the motor 111 and compensate for the leakage of the oil pump system. Specifically, the make-up oil pump 113 is used to supply oil to the side with lower oil pressure in the rodless chambers of the first oil cylinder 101 and the second oil cylinder 102 through the third one-way valve 1161 and the second one-way valve 1162. Optionally, the pressure of the make-up oil pump can be set slightly higher than the minimum operating pressure of the system to ensure that the make-up oil pump can effectively supply oil to the low-pressure side.

[0137] It should be noted that in the pumping control system provided in this embodiment, an electric motor is used to replace the fuel engine, and a motor is used to replace the oil pump. The cooperation of the electric motor and the motor is used to drive and control the oil pump system. This solution utilizes the high-speed rotation characteristics of the electric motor and the motor, improves the rotation speed of the oil pump system, reduces the displacement of the motor, increases the power density of the oil pump system, and improves the efficiency of the oil pump system. At the same time, the energy-saving characteristics of the electric motor are also utilized to reduce energy consumption. In addition, by controlling the motor speed to control the flow output of the motor, and thus controlling the cylinder speed, it can not only achieve precise control of the pumping speed and direction of the cylinder, but also has the effects of fast cylinder commutation speed, fast response, and more continuous pumping of materials.

[0138] It should be understood that in this embodiment, only the rodless chamber oil inlet system is used as the oil pump system, the proximity switch is used as the detection device, and the electronic commutator is used as the make-up and drain valve to illustrate the structure of the pumping control system. When the rod chamber oil inlet system is used as the oil pump system, other detection devices such as displacement sensors are used as the detection device, and other devices with the same function are used as the make-up and drain valve, the above-mentioned structure of the pumping control system is also applicable, and will not be elaborated here.

[0139] The pumping control system provided in this embodiment realizes the oil supply to the oil cylinder by setting a one-way valve in cooperation with the make-up and drain oil pump; sets a safety valve to limit the maximum pressure of the oil pump system; sets an electric motor and a motor to control the speed and direction of the pumping operation of the oil pump system; sets a make-up oil pump to supply oil to the oil pump system to ensure the oil suction pressure for the high-speed rotation of the motor and compensate for system leakage. This solution ensures the safety, stability, and high efficiency of the oil pump system during the pumping operation.

[0140] Figure 7 The following is a schematic flowchart of a pumping control method provided in the fourth embodiment of the present application, which is applied to the controller in the above system embodiment. As Figure 7 shown, the pumping control method provided in this embodiment includes:

[0141] S101. Obtain the detection results detected by the detection devices in the first oil cylinder and the second oil cylinder in the pumping control system, where the detection results are used to indicate the positions of the piston rods in each oil cylinder.

[0142] In this step, in order to determine whether the strokes of the piston rods in the two hydraulic cylinders are abnormal, it is necessary to obtain the positions of the piston rods in the first hydraulic cylinder and the second hydraulic cylinder detected by the detection device to determine whether the two piston rods reach the positions simultaneously.

[0143] It should be understood that the piston rods in the two hydraulic cylinders reaching the positions simultaneously indicates that the strokes of the piston rods in the two hydraulic cylinders are normal; otherwise, it indicates that the strokes of the piston rods in the two hydraulic cylinders are abnormally normal.

[0144] In the specific implementation of this solution, when the controller determines according to the detection result that one of the piston rods reaches the position first, it can start to control the make-up and bleed valve to supply oil or drain oil to the hydraulic cylinder, without waiting for both piston rods to reach the positions before starting the control, ensuring the timeliness of the hydraulic cylinder to adjust the stroke by itself.

[0145] S102. According to the detection result, control the make-up and bleed valve in the pumping control system to supply oil or drain oil to the first hydraulic cylinder and / or the second hydraulic cylinder to adjust the stroke of the piston rod in the first hydraulic cylinder and / or the second hydraulic cylinder.

[0146] In this step, it is necessary to judge whether the two piston rods reach the positions simultaneously according to the positions of the piston rods in each hydraulic cylinder in the detection result; judge whether it is necessary to control the make-up and bleed valve to supply oil or drain oil to the first hydraulic cylinder and / or the second hydraulic cylinder according to whether the two piston rods reach the positions simultaneously. If the two piston rods reach the positions simultaneously, it is determined that there is no need to supply oil or drain oil to the first hydraulic cylinder and / or the second hydraulic cylinder. If the two piston rods do not reach the positions simultaneously, it is determined that it is necessary to supply oil or drain oil to the first hydraulic cylinder and / or the second hydraulic cylinder; when it is determined that it is necessary to control the make-up and bleed valve to supply oil or drain oil to the first hydraulic cylinder and / or the second hydraulic cylinder, control the make-up and bleed valve to supply oil or drain oil to the first hydraulic cylinder and / or the second hydraulic cylinder.

[0147] In a specific implementation manner, if the rod chambers of the first hydraulic cylinder and the second hydraulic cylinder in the pumping control system are connected (that is, the oil pump system is a rodless chamber oil inlet system), then according to the detection result, controlling the make-up and bleed valve in the pumping control system to supply oil or drain oil to the first hydraulic cylinder and / or the second hydraulic cylinder may include:

[0148] Case 1. If the detection result indicates that the piston rod in the first hydraulic cylinder extends to the first preset position and the piston rod in the second hydraulic cylinder does not retract to the second preset position, then control the make-up and bleed valve to supply oil to the rodless chambers of the first hydraulic cylinder and / or the second hydraulic cylinder.

[0149] Wherein, the first preset position is the position where the piston rod in the first hydraulic cylinder reaches the position when the first hydraulic cylinder is in the extended working condition; the second preset position is the position where the piston rod in the second hydraulic cylinder reaches the position when the second hydraulic cylinder is in the extended working condition.

[0150] It should be understood that if the detection result indicates that the piston rod in the first oil cylinder extends to the first preset position and the piston rod in the second oil cylinder does not retract to the second preset position, it means that when the first oil cylinder is in the extended condition, the second oil cylinder fails to retract in time. The oil in the rod chamber of the first oil cylinder and / or the second oil cylinder is relatively less, which is not enough to push the second oil cylinder to retract in time. At this time, it is necessary to control the make-up and bleed valve to supply oil to the non-inlet chamber of the first oil cylinder and / or the second oil cylinder to adjust the stroke of the oil cylinder.

[0151] Wherein, extending / retracting in place means that the piston rod extends / retracts to the preset position.

[0152] Case 2: If the detection result indicates that the piston rod in the second oil cylinder retracts to the second preset position and the piston rod in the first oil cylinder does not extend to the first preset position, control the make-up and bleed valve to bleed the oil in the rod chamber of the first oil cylinder and / or the second oil cylinder.

[0153] It should be understood that if the detection result indicates that the piston rod in the second oil cylinder retracts to the second preset position and the piston rod in the first oil cylinder does not extend to the first preset position, it means that when the first oil cylinder is in the extended condition, the second oil cylinder retracts in place first, and the oil in the rod chamber of the first oil cylinder and / or the second oil cylinder is relatively more. At this time, it is necessary to control the make-up and bleed valve to bleed the oil in the non-inlet chamber of the first oil cylinder and / or the second oil cylinder to adjust the stroke of the oil cylinder.

[0154] Case 3: If the detection result indicates that the piston rod in the first oil cylinder retracts to the third preset position and the piston rod in the second oil cylinder does not extend to the fourth preset position, control the make-up and bleed valve to bleed the oil in the rod chamber of the first oil cylinder and / or the second oil cylinder.

[0155] Wherein, the third preset position is the position where the piston rod in the first oil cylinder extends and retracts when the second oil cylinder is in the extended condition; the second preset position is the position where the piston rod in the second oil cylinder extends in place when the second oil cylinder is in the extended condition.

[0156] It should be understood that similarly, if the detection result indicates that the piston rod in the first oil cylinder retracts to the third preset position and the piston rod in the second oil cylinder does not extend to the fourth preset position, it means that when the second oil cylinder is in the extended condition, the first oil cylinder retracts in place first, and the oil in the rod chamber of the first oil cylinder and / or the second oil cylinder is relatively more. At this time, it is necessary to control the make-up and bleed valve to bleed the oil in the rod chamber of the first oil cylinder and / or the second oil cylinder to adjust the stroke of the oil cylinder.

[0157] Case 4: If the detection result indicates that the piston rod in the second oil cylinder extends to the fourth preset position and the piston rod in the first oil cylinder does not retract to the third preset position, control the make-up and bleed valve to supply oil to the rod chamber of the first oil cylinder and / or the second oil cylinder.

[0158] It should be understood that, similarly, if the detection result indicates that the piston rod in the first oil cylinder extends to the first preset position and the piston rod in the second oil cylinder does not retract to the second preset position, it means that when the second oil cylinder is in the extended condition, the first oil cylinder fails to retract in time. The oil in the rod chamber of the first oil cylinder and / or the second oil cylinder is relatively less, which is not enough to push the first oil cylinder to retract in time. At this time, it is necessary to control the make-up and bleed valve to supply oil to the rod chamber of the first oil cylinder and / or the second oil cylinder to adjust the stroke of the oil cylinder.

[0159] Among them, the values of the first preset position, the second preset position, the third preset position, and the fourth preset position in the above four cases are determined according to the length of the oil cylinder, and the present application does not limit this.

[0160] In a specific implementation manner, if the rodless chambers of the first oil cylinder and the second oil cylinder in the pumping control system are connected (that is, the oil pump system is a rod chamber oil inlet system), then according to the detection result, controlling the make-up and bleed valve in the pumping control system to supply oil or bleed oil to the first oil cylinder and / or the second oil cylinder may include:

[0161] Case 1: If the detection result indicates that the piston rod in the first oil cylinder extends to the first preset position and the piston rod in the second oil cylinder does not retract to the second preset position, then control the make-up and bleed valve to supply oil to the rodless chambers of the first oil cylinder and / or the second oil cylinder.

[0162] Case 2: If the detection result indicates that the piston rod in the second oil cylinder retracts to the second preset position and the piston rod in the first oil cylinder does not extend to the first preset position, then control the make-up and bleed valve to bleed oil from the rodless chambers of the first oil cylinder and / or the second oil cylinder.

[0163] Case 3: If the detection result indicates that the piston rod in the first oil cylinder retracts to the third preset position and the piston rod in the second oil cylinder does not extend to the fourth preset position, then control the make-up and bleed valve to bleed oil from the rodless chambers of the first oil cylinder and / or the second oil cylinder.

[0164] Case 4: If the detection result indicates that the piston rod in the second oil cylinder extends to the fourth preset position and the piston rod in the first oil cylinder does not retract to the third preset position, then control the make-up and bleed valve to supply oil to the rodless chambers of the first oil cylinder and / or the second oil cylinder.

[0165] It should be understood that in this implementation manner, the understanding of the first preset position, the second preset position, the third preset position, and the fourth preset position, as well as the implementation principle of the above process, is the same as that when the oil pump system is a rodless chamber oil inlet system, and will not be elaborated here.

[0166] In a specific implementation manner, if the detection device is four proximity switches, the first preset position, the second preset position, the third preset position, and the fourth preset position respectively correspond to the installation positions of the first proximity switch, the second proximity switch, the third proximity switch, and the fourth proximity switch; if the detection device is two displacement sensors, the first preset position, the second preset position, the third preset position, and the fourth preset position correspond to the preset displacements of the two piston rods.

[0167] In a specific implementation manner, the pumping control method provided in this embodiment further includes:

[0168] When the detection result indicates that the piston rod in the first oil cylinder reaches the first preset position, and / or the piston rod in the second oil cylinder reaches the second preset position, or when the detection result indicates that the piston rod in the first oil cylinder reaches the third preset position, and / or the piston rod in the second oil cylinder reaches the fourth preset position, control the motor in the pumping control system to reverse;

[0169] and / or,

[0170] When the detection result indicates that the piston rod in the first oil cylinder reaches the first preset position, and / or the piston rod in the second oil cylinder reaches the second preset position, or when the detection result indicates that the piston rod in the first oil cylinder reaches the third preset position, and / or the piston rod in the second oil cylinder reaches the fourth preset position, control the pressure relief valve in the pumping control system to relieve pressure on the first oil cylinder and the second oil cylinder.

[0171] In this implementation manner, after the controller determines that a piston rod is in place according to the detection result, it starts to prepare for the oil pump system to reverse and enter the next working condition: control the motor in the pumping control system to reverse. Specifically, the speed of the motor will be controlled to decrease to 0, and after it reaches 0, the motor will be controlled to reverse. At the same time, the pressure relief valve can also be controlled to communicate the first oil cylinder and the second oil cylinder to relieve the pressure on the oil cylinders, buffer the movement of the piston rods in the oil cylinders, and prevent the piston rods from hitting the cylinders. Specifically, if the rodless chambers of the first oil cylinder and the second oil cylinder in the pumping control system are connected (i.e., the oil pump system is a rodless chamber oil inlet system), then control the pressure relief valve to be energized to communicate the rodless chambers of the first oil cylinder and the second oil cylinder to relieve the pressure on the oil cylinders; if the rod chambers of the first oil cylinder and the second oil cylinder in the pumping control system are connected (i.e., the oil pump system is a rod chamber oil inlet system), then control the pressure relief valve to be energized to communicate the rod chambers of the first oil cylinder and the second oil cylinder to relieve the pressure on the oil cylinders.

[0172] The pumping control system provided by the embodiment of the present application first obtains the detection results detected by the detection devices in the first oil cylinder and the second oil cylinder of the pumping control system, which are used to indicate the positions of the piston rods in each oil cylinder. Then, according to the detection results, it controls the oil filling and discharging valve in the pumping control system to fill or discharge oil into the first oil cylinder and / or the second oil cylinder, so as to adjust the piston rod stroke in the first oil cylinder and / or the second oil cylinder, and automatically adjust the oil cylinder stroke, achieving the effect of effectively preventing the phenomenon of the oil cylinder hitting the cylinder or the stroke becoming shorter. In addition, it also controls the motor to reverse according to the detection results, and / or controls the pressure relief valve to relieve the pressure of the first oil cylinder and the second oil cylinder according to the detection results, effectively buffering the movement of the piston rod in the oil cylinder when the oil pump system is about to reverse and preventing the piston rod from hitting the cylinder.

[0173] Embodiment 5 of the present application provides a specific pumping control method, including: the first oil cylinder is in the extended working condition, the first commutation working condition of converting from the extended working condition of the first oil cylinder to the extended working condition of the second oil cylinder, the second oil cylinder is in the extended working condition, and the second commutation working condition of converting from the extended working condition of the second oil cylinder to the extended working condition of the first oil cylinder. The following will continue to combine Figure 6 to illustrate the specific pumping control method provided by this embodiment. The specific content is as follows:

[0174] The first oil cylinder is in the extended working condition:

[0175] The controller 20 controls the motor 110 to rotate forward. The motor 111 is directly driven by the motor 110. At this time, the a side of the motor 111 is the high-pressure oil port and the b side is the low-pressure oil port; the high-pressure oil on the a side of the motor 111 enters the rodless cavity of the first oil cylinder 101, pushing the piston rod in the first oil cylinder 101 to extend; the hydraulic oil in the rod cavity of the first oil cylinder 101 enters the rod cavity of the second oil cylinder 101 through the connecting pipeline, pushing the second oil cylinder 102 to retract; the oil in the rodless cavity of the second oil cylinder 102 is discharged and enters the b side of the motor 111 to achieve oil suction;

[0176] The first commutation working condition of converting from the extended working condition of the first oil cylinder to the extended working condition of the second oil cylinder:

[0177] When the first oil cylinder 101 extends to the end, it triggers the first proximity switch 1061 to send a in-place signal to the controller 20, and this in-place signal indicates that the piston rod in the first oil cylinder 101 extends to the end; or, when the second oil cylinder 102 retracts to the end, it triggers the fourth proximity switch 1064 to send a in-place signal to the controller 20, and this in-place signal indicates that the piston rod in the second oil cylinder 102 retracts to the end; after the controller 20 receives the first in-place signal, it controls the motor 110 to start commuting, and at the same time controls the pressure relief valve 112 to be powered on, so that the pressure relief valve 112 communicates the high pressure in the rodless cavity of the first oil cylinder 101 and the low pressure in the rodless cavity of the second oil cylinder 102 to relieve the pressure of the oil pump system;

[0178] Meanwhile, if the controller 20 does not receive the in-place signals sent by the first proximity switch 1061 and the fourth proximity switch 1064 simultaneously, then when the controller 20 first receives the in-place signal sent by the first proximity switch 1061, it indicates that the second oil cylinder 102 has not retracted in place. At this time, the controller 20 controls the make-up and bleed valve 105 to fill the rod chamber of the second oil cylinder 102 with high-pressure oil from the rodless chamber of the first oil cylinder 101 or the second oil cylinder 102; when the controller 20 first receives the in-place signal sent by the fourth proximity switch 1064, it indicates that the first oil cylinder 101 has not extended in place. At this time, the controller 20 controls the make-up and bleed valve 105 to drain the oil in the rod chamber of the second oil cylinder 102.

[0179] The second oil cylinder is in the extended working condition:

[0180] The pressure relief valve 112 loses power, and the controller 20 controls the motor 110 to reverse. At this time, the b side of the motor 111 is the high-pressure oil port and the a side is the low-pressure oil port; the high-pressure oil on the b side of the motor 111 enters the rodless chamber of the second oil cylinder 102, pushing the piston rod in the second oil cylinder 102 to extend; the hydraulic oil in the rod chamber of the second oil cylinder 102 enters the rod chamber of the second oil cylinder 101 through the connecting pipeline, pushing the first oil cylinder 101 to retract; the oil in the rodless chamber of the first oil cylinder 101 is discharged and enters the a side of the motor 111 to achieve oil suction;

[0181] The second commutation working condition for converting from the extended working condition of the second oil cylinder to the extended working condition of the first oil cylinder:

[0182] When the second oil cylinder 102 extends in place, it triggers the third proximity switch 1063 to send an in-place signal to the controller 20, and this in-place signal indicates that the piston rod in the second oil cylinder 102 has extended in place; or, when the first oil cylinder 101 retracts in place, it triggers the second proximity switch 1062 to send an in-place signal to the controller 20, and this in-place signal indicates that the piston rod in the first oil cylinder 101 has retracted in place; after the controller 20 receives the first in-place signal, it controls the motor 110 to start commuting, and at the same time controls the pressure relief valve 11 to be powered on, so that the pressure relief valve 112 connects the high pressure in the rodless chamber of the first oil cylinder 101 and the low pressure in the rodless chamber of the second oil cylinder 102 to relieve the pressure of the oil pump system;

[0183] Meanwhile, if the controller 20 does not receive the in-place signals sent by the second proximity switch 1062 and the third proximity switch 1063 simultaneously, then when the controller 20 first receives the in-place signal sent by the third proximity switch 1063, it indicates that the first oil cylinder 101 has not retracted in place. At this time, the controller 20 controls the make-up and bleed valve 105 to fill the rod chamber of the second oil cylinder 102 with high-pressure oil from the rodless chamber of the first oil cylinder 101 or the second oil cylinder 102; when the controller 20 first receives the in-place signal sent by the second proximity switch 1062, it indicates that the second oil cylinder 102 has not extended in place. At this time, the controller 20 controls the make-up and bleed valve 105 to drain the oil in the rod chamber of the second oil cylinder 102.

[0184] Repeat the above four working conditions to achieve continuous pumping.

[0185] In addition, during the above pumping process, the movement speeds of the first oil cylinder and the second oil cylinder are controlled by adjusting the output flow rate of the motor 110 to control the motor 111; the make-up oil pump 113 continuously supplies oil to the oil pump system, and the pressure of the make-up oil pump 113 can be adjusted according to the requirements of the oil pump system.

[0186] The specific pumping control method provided by the embodiment of the present application has a similar implementation principle and technical effect, which will not be elaborated here in this embodiment.

[0187] Figure 8 As shown in the following figure, it is a schematic structural diagram of the pumping control device provided in the sixth embodiment of the present application. Figure 8 As shown, the pumping control device 30 provided in this embodiment includes:

[0188] An acquisition unit 301, configured to acquire the detection results detected by the detection devices in the first oil cylinder and the second oil cylinder in the pumping control system, where the detection results are used to indicate the positions of the piston rods in each oil cylinder;

[0189] A control unit 302, configured to control the make-up and drain valve in the pumping control system to supply oil or drain oil to / from the first oil cylinder and / or the second oil cylinder according to the detection results, so as to adjust the piston rod strokes in the first oil cylinder and / or the second oil cylinder.

[0190] The pumping control device 30 provided in this embodiment can execute the method provided in the above method embodiment, and has a similar implementation principle and technical effect, which will not be elaborated here in this embodiment.

[0191] Figure 9 As shown in the following figure, it is a schematic structural diagram of the pumping control device provided in the seventh embodiment of the present application. Figure 9 As shown, on the basis of the above embodiment, the pumping control device 30 provided in this embodiment further includes:

[0192] A commutation unit 303, configured to control the commutation of the motor in the pumping control system when the detection results indicate that the piston rod in the first oil cylinder reaches the first preset position, and / or the piston rod in the second oil cylinder reaches the second preset position, or when the detection results indicate that the piston rod in the first oil cylinder reaches the third preset position, and / or the piston rod in the second oil cylinder reaches the fourth preset position;

[0193] And / or, when the detection result indicates that the piston rod in the first oil cylinder reaches the first preset position, and / or the piston rod in the second oil cylinder reaches the second preset position, or when the detection result indicates that the piston rod in the first oil cylinder reaches the third preset position, and / or the piston rod in the second oil cylinder reaches the fourth preset position, control the pressure relief valve in the pumping control system to relieve pressure on the first oil cylinder and the second oil cylinder.

[0194] In a possible implementation manner, if the rod chambers of the first oil cylinder and the second oil cylinder in the pumping control system are communicated, the control unit 302 is specifically configured to:

[0195] If the detection result indicates that the piston rod in the first oil cylinder extends to the first preset position and the piston rod in the second oil cylinder does not retract to the second preset position, control the make-up and bleed valve to supply oil to the rod chamber of the first oil cylinder and / or the second oil cylinder;

[0196] If the detection result indicates that the piston rod in the second oil cylinder retracts to the second preset position and the piston rod in the first oil cylinder does not extend to the first preset position, control the make-up and bleed valve to drain oil from the rod chamber of the first oil cylinder and / or the second oil cylinder;

[0197] If the detection result indicates that the piston rod in the first oil cylinder retracts to the third preset position and the piston rod in the second oil cylinder does not extend to the fourth preset position, control the make-up and bleed valve to drain oil from the rod chamber of the first oil cylinder and / or the second oil cylinder;

[0198] If the detection result indicates that the piston rod in the second oil cylinder extends to the fourth preset position and the piston rod in the first oil cylinder does not retract to the third preset position, control the make-up and bleed valve to supply oil to the rodless chamber of the first oil cylinder and / or the second oil cylinder.

[0199] In a possible implementation manner, if the rodless chambers of the first oil cylinder and the second oil cylinder in the pumping control system are communicated, the control unit 302 is specifically configured to:

[0200] If the detection result indicates that the piston rod in the first oil cylinder extends to the first preset position and the piston rod in the second oil cylinder does not retract to the second preset position, control the make-up and bleed valve to supply oil to the rodless chamber of the first oil cylinder and / or the second oil cylinder;

[0201] If the detection result indicates that the piston rod in the second oil cylinder is retracted to the second preset position and the piston rod in the first oil cylinder is not extended to the first preset position, control the make-up and bleed valve to bleed oil into the rodless chambers of the first oil cylinder and / or the second oil cylinder;

[0202] If the detection result indicates that the piston rod in the first oil cylinder is retracted to the third preset position and the piston rod in the second oil cylinder is not extended to the fourth preset position, control the make-up and bleed valve to bleed oil into the rodless chambers of the first oil cylinder and / or the second oil cylinder;

[0203] If the detection result indicates that the piston rod in the second oil cylinder is extended to the fourth preset position and the piston rod in the first oil cylinder is not retracted to the third preset position, control the make-up and bleed valve to fill oil into the rodless chambers of the first oil cylinder and / or the second oil cylinder.

[0204] The pumping control device 30 provided in this embodiment can execute the method provided in the above method embodiment, and its implementation principle and technical effect are similar, which will not be elaborated here in this embodiment.

[0205] Figure 10 It is a schematic structural diagram of the controller provided in this application. As Figure 10 shown, the controller 40 provided in this embodiment includes: at least one processor 401 and a memory 402. Optionally, the controller 40 further includes a communication component 403. Among them, the processor 401, the memory 402, and the communication component 403 are connected through a bus 404.

[0206] In the specific implementation process, at least one processor 401 executes the computer execution instructions stored in the memory 402, so that at least one processor 401 executes the above method.

[0207] The specific implementation process of the processor 401 can refer to the above method embodiment, and its implementation principle and technical effect are similar, which will not be elaborated here in this embodiment.

[0208] In the above embodiments, it should be understood that the processor may be a central processing unit (CPU for short), or other general-purpose processors, digital signal processors (DSP for short), application specific integrated circuits (ASIC for short), etc. The general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of the method disclosed in combination with the invention can be directly embodied as being executed and completed by a hardware processor, or by a combination of hardware and software modules in the processor.

[0209] The memory may include a read-only memory and a random access memory. The memory may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may include a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may include a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available. For example, static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct rambus random access memory (DR RAM).

[0210] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, the buses in the drawings of this application are not limited to only one bus or one type of bus.

[0211] This application also provides a construction machinery, in which the pumping control system provided in the above embodiment is provided.

[0212] It should be noted that the construction machinery is a device with functions of transporting and pumping materials (such as concrete, mortar, liquid raw materials, etc.). For example, concrete pump trucks, wet shotcreters, etc.

[0213] This application also provides a computer program product, including a computer program, which implements the above method when executed by a processor.

[0214] This application also provides a computer-readable storage medium, in which computer-executable instructions are stored, and when the processor executes the computer-executable instructions, the above method is implemented.

[0215] The above-readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as SRAM, EEPROM, EPROM, PROM, ROM, magnetic memory, flash memory, a magnetic disk or an optical disk. The readable storage medium can be any available medium accessible by a general-purpose or special-purpose computer.

[0216] An exemplary readable storage medium is coupled to the processor, so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can be located in an ASIC. Of course, the processor and the readable storage medium can also exist as discrete components in the device.

[0217] The division of units is only a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces, and the indirect couplings or communication connections of devices or units can be in electrical, mechanical or other forms.

[0218] The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units can be selected according to actual needs to achieve the objectives of the solution of this embodiment.

[0219] In addition, in each embodiment of the present invention, the various functional units may be integrated in one processing unit, may exist separately as individual physical units, or two or more units may be integrated in one unit.

[0220] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in each embodiment of the present invention. The aforementioned storage medium includes: USB flash drives, mobile hard disks, ROM, RAM, magnetic disks, or optical discs, etc., which can store program codes.

[0221] Those of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When this program is executed, it executes the steps including the above method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disks, or optical discs, etc., which can store program codes.

[0222] Finally, it should be noted that: After considering the specification and practicing the invention disclosed herein, those skilled in the art will easily think of other implementation schemes of the present invention. The present invention is intended to cover any variations, uses, or adaptive changes of the present invention. These variations, uses, or adaptive changes follow the general principles of the present invention and include common general knowledge or conventional technical means in the technical field not disclosed in the present invention. It is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. A pumping control system, characterized in that, Comprising: An oil pump system (10) and a controller (20); Wherein, the oil pump system (10) includes: a first oil cylinder (101), a second oil cylinder (102), a first delivery cylinder (103) connected to the first oil cylinder (101) by a piston rod, a second delivery cylinder (104) connected to the second oil cylinder (102) by a piston rod, and a make-up and bleed valve (105) connected to the controller (20); The rod chambers of the first oil cylinder (101) and the second oil cylinder (102) are in communication, or, the rodless chambers of the first oil cylinder (101) and the second oil cylinder (102) are in communication; Detection devices (106) are respectively arranged in the first oil cylinder (101) and the second oil cylinder (102), and the detection devices (106) are both connected to the controller (20); The detection device (106) is used to detect the positions of the piston rods in the first oil cylinder (101) and the second oil cylinder (102); The controller (20) is used to control the make-up and bleed valve (105) to supply oil or drain oil to / from the first oil cylinder (101) and / or the second oil cylinder (102) according to the detection results of the detection device (106), so as to adjust the piston rod strokes in the first oil cylinder (101) and / or the second oil cylinder (102).

2. The pumping control system according to claim 1, characterized in that, The make-up and bleed valve (105) includes a make-up and bleed port (1051), an oil inlet port (1052), and an oil drain port (1053); Two one-way valves (109) are arranged between the oil delivery pipeline (1071) of the first oil cylinder and the oil delivery pipeline (1072) of the second oil cylinder; If the oil pump system (10) is a rodless chamber oil inlet system, the make-up and bleed port (1051) is in communication with the rod chambers of the first oil cylinder (101) and / or the second oil cylinder (102), the oil inlet port (1052) is connected between the two one-way valves (1098), and the oil drain port (1053) is in communication with the fuel tank (108); If the oil pump system (10) is a rod chamber oil inlet system, the make-up and bleed port (1051) is in communication with the rodless chambers of the first oil cylinder (101) and / or the second oil cylinder (102), the oil inlet port (1052) is connected between the two one-way valves (109), and the oil drain port (1053) is in communication with the fuel tank (108); When the make-up and bleed valve (105) supplies oil to the first oil cylinder (101) and / or the second oil cylinder (102), the one-way valve (109) on the high-pressure oil side in the oil delivery pipeline (1071) of the first oil cylinder and the oil delivery pipeline (1072) of the second oil cylinder is in communication, and the high-pressure oil enters the first oil cylinder (101) and / or the second oil cylinder (102) through the oil inlet port (1052) and the make-up and bleed port (1051) of the make-up and bleed valve (105).

3. The pumping control system according to claim 1 or 2, characterized in that, The make-up and bleed valve (105) is an electronic reversing valve.

4. The pumping control system according to claim 1 or 2, characterized in that, The detection device (106) includes a proximity switch or a displacement sensor.

5. The pumping control system according to claim 4, wherein If the detection device (106) is a proximity switch, a first proximity switch (1061) and a second proximity switch (1062) are respectively arranged at positions with a preset length from both ends of the first oil cylinder (101), and a third proximity switch (1063) and a fourth proximity switch (1064) are respectively arranged at positions with the preset length from both ends of the second oil cylinder (102).

6. The pumping control system according to claim 4, characterized in that, If the detection device (106) is a displacement sensor, a first displacement sensor (1065) is arranged inside the first oil cylinder (101) along the moving direction of the piston rod, and a second displacement sensor (1066) is arranged inside the second oil cylinder (102) along the moving direction of the piston rod; The first displacement sensor (1065) is used to detect the displacement of the piston rod in the first oil cylinder (101), and the second displacement sensor (1066) is used to detect the displacement of the piston rod in the second oil cylinder (102).

7. The pumping control system according to any one of claims 1, 2, 5 or 6, characterized in that, The oil pump system (10) further includes a motor (110) and a motor (111); The motor (110) is electrically connected to the controller (20), and the motor (110) is used to drive the motor (111) to rotate to supply oil to the oil pump system (10).

8. The pumping control system according to claim 7, wherein The oil pump system (10) further includes: a pressure relief valve (112), one end of the pressure relief valve (112) is respectively connected to one end of the motor (111) and the oil delivery pipeline (1071) of the first oil cylinder or the oil delivery pipeline (1072) of the second oil cylinder, and the other end of the pressure relief valve (112) is respectively connected to the other end of the motor (111) and the oil delivery pipeline (1072) of the second oil cylinder or the oil delivery pipeline (1071) of the first oil cylinder; The controller (20) is used to control the pressure relief valve (112) to connect the second oil cylinder (102) and the first oil cylinder (101) for pressure relief according to the detection result of the detection device (106).

9. A pumping control method, characterized in that, A controller applied to the pumping control system according to any one of claims 1 to 8, the method includes: Obtain the detection results detected by the detection devices in the first oil cylinder and the second oil cylinder of the pumping control system, and the detection results are used to indicate the positions of the piston rods in each oil cylinder; According to the detection results, control the make-up and bleed valve in the pumping control system to supply oil or bleed oil to the first oil cylinder and / or the second oil cylinder to adjust the piston rod stroke in the first oil cylinder and / or the second oil cylinder.

10. The method according to claim 9, wherein If the rod chambers of the first oil cylinder and the second oil cylinder in the pumping control system are connected, according to the detection results, controlling the make-up and bleed valve in the pumping control system to supply oil or bleed oil to the first oil cylinder and / or the second oil cylinder includes: If the detection results indicate that the piston rod in the first oil cylinder extends to a first preset position and the piston rod in the second oil cylinder does not retract to a second preset position, then control the make-up and bleed valve to supply oil to the rod chambers of the first oil cylinder and / or the second oil cylinder; If the detection result indicates that the piston rod in the second oil cylinder retracts to the second preset position and the piston rod in the first oil cylinder does not extend to the first preset position, then control the make-up and drain valve to drain oil to the rod chambers of the first oil cylinder and / or the second oil cylinder; If the detection result indicates that the piston rod in the first oil cylinder retracts to the third preset position and the piston rod in the second oil cylinder does not extend to the fourth preset position, then control the make-up and drain valve to drain oil to the rod chambers of the first oil cylinder and / or the second oil cylinder; If the detection result indicates that the piston rod in the second oil cylinder extends to the fourth preset position and the piston rod in the first oil cylinder does not retract to the third preset position, then control the make-up and drain valve to supply oil to the rod chambers of the first oil cylinder and / or the second oil cylinder.

11. The method according to claim 9, characterized in that, If the rodless chambers of the first oil cylinder and the second oil cylinder in the pumping control system are in communication, then according to the detection result, controlling the make-up and drain valve in the pumping control system to supply oil or drain oil to the first oil cylinder and / or the second oil cylinder includes: If the detection result indicates that the piston rod in the first oil cylinder extends to the first preset position and the piston rod in the second oil cylinder does not retract to the second preset position, then control the make-up and drain valve to supply oil to the rodless chambers of the first oil cylinder and / or the second oil cylinder; If the detection result indicates that the piston rod in the second oil cylinder retracts to the second preset position and the piston rod in the first oil cylinder does not extend to the first preset position, then control the make-up and drain valve to drain oil to the rodless chambers of the first oil cylinder and / or the second oil cylinder; If the detection result indicates that the piston rod in the first oil cylinder retracts to the third preset position and the piston rod in the second oil cylinder does not extend to the fourth preset position, then control the make-up and drain valve to drain oil to the rodless chambers of the first oil cylinder and / or the second oil cylinder; If the detection result indicates that the piston rod in the second oil cylinder extends to the fourth preset position and the piston rod in the first oil cylinder does not retract to the third preset position, then control the make-up and drain valve to supply oil to the rodless chambers of the first oil cylinder and / or the second oil cylinder.

12. The method according to any one of claims 9 to 11, characterized in that, The method further includes: When the detection result indicates that the piston rod in the first oil cylinder reaches the first preset position and / or the piston rod in the second oil cylinder reaches the second preset position, or when the detection result indicates that the piston rod in the first oil cylinder reaches the third preset position and / or the piston rod in the second oil cylinder reaches the fourth preset position, control the motor in the pumping control system to reverse; and / or, When the detection result indicates that the piston rod in the first oil cylinder reaches the first preset position and / or the piston rod in the second oil cylinder reaches the second preset position, or when the detection result indicates that the piston rod in the first oil cylinder reaches the third preset position and / or the piston rod in the second oil cylinder reaches the fourth preset position, control the pressure relief valve in the pumping control system to relieve pressure on the first oil cylinder and the second oil cylinder.

13. A pumping control device, characterized in that, including: An acquisition unit for acquiring the detection results detected by the detection devices in the first oil cylinder and the second oil cylinder in the pumping control system, where the detection results are used to indicate the positions of the piston rods in each oil cylinder; A control unit for controlling the make-up and drain valve in the pumping control system to supply oil or drain oil to and / or from the first oil cylinder and / or the second oil cylinder according to the detection results, so as to adjust the piston rod strokes in the first oil cylinder and / or the second oil cylinder.

14. A controller, characterized in that, Comprising: A memory and a processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the processor executes the method according to any one of claims 9-12.

15. An engineering machinery, characterized in that, The construction machinery is provided with the pumping control system according to any one of claims 1 to 8.

16. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement the method according to any one of claims 9-12.

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