Excavator bucket rod potential energy regeneration and reuse control system and method

Abstract

The invention discloses an excavator bucket rod potential energy regeneration and reuse control system and method, and the system comprises a first main control element, a second main control element, an energy accumulator, a first potential energy regeneration control element, a second potential energy regeneration control element, a first detection device and a second detection device, a first control pipeline and a second control pipeline are respectively formed between the first main control element and the second main control element and between the first main control element and the second main control element and a connecting pipeline which is hermetically connected with a rod cavity and a rodless cavity of the bucket rod; a first control oil port of the first potential energy regeneration control element is connected to a second control pipeline, and a second control oil port of the first potential energy regeneration control element is connected to a connecting pipeline connected with a rodless cavity of the bucket rod; a first control oil port of the second potential energy regeneration control element is connected to a connecting pipeline connected with a rod cavity of the bucket rod, and a second control oil port of the second potential energy regeneration control element is connected to an output pipeline of the second control oil port of the first potential energy regeneration control element; the first detection device and the second detection device are used for collecting pressure of a rodless cavity and a rod cavity of the bucket rod respectively.

Description

Technical Field

[0001] The present invention relates to the technical field of excavators, and in particular to a control system and method for regenerating and reusing the potential energy of an excavator boom. Background Art

[0002] When the excavator boom is digging, the oil in the rod chamber has a high back pressure due to the boom's own weight and flows back to the oil tank, resulting in energy waste; the rodless chamber is sucked empty due to insufficient oil supply, causing the movement to pause and uneven speed.

[0003] The existing control method is to add a regeneration cut-off valve to the main oil inlet and return lines of the large and small chambers of the boom. When the oil inlet to the large chamber is less than the set pressure of the regeneration cut-off valve, the small chamber replenishes oil to the large chamber. However, the disadvantage of this method is that the regeneration cut-off pressure is a constant, and it is impossible to achieve accurate regeneration under different load conditions, which can easily lead to uneven cylinder speed, and the coordination and smoothness cannot meet actual needs. Summary of the invention

[0004] In order to solve some or all of the technical problems existing in the above-mentioned prior art, the present invention provides a control system and method for the regeneration and reuse of the potential energy of the excavator boom, so that the boom regeneration cut-off pressure is a variable, which can realize flow regeneration control at different speed requirements under high, medium and low loads, thereby achieving the best utilization of the boom potential energy.

[0005] The technical solution of the present invention is as follows:

[0006] In a first aspect, the present invention provides a control system for regenerating and reusing potential energy of an excavator arm, comprising:

[0007] A first main control element, wherein an oil outlet of the first main control element is sealedly connected to a rodless cavity of an excavator boom;

[0008] A second main control element, wherein the oil outlet of the second main control element is sealedly connected to the rodless cavity of the excavator boom, and a first control pipeline connected to the control oil outlet of the first main control element is connected to the connecting pipeline sealedly connected to the rodless cavity of the excavator boom, and the control oil outlet of the second main control element is connected to the connecting pipeline connected to the rod cavity of the excavator boom of the first main control element, so as to form a second control pipeline;

[0009] an accumulator, wherein the accumulator is arranged on the second control pipeline;

[0010] A first potential energy regeneration control element, wherein the first control oil port of the first potential energy regeneration control element is connected to a control pipeline connecting the accumulator to the control oil port of the second main control element, and the second control oil port of the first potential energy regeneration control element is connected to a connecting pipeline connecting the oil outlet of the second main control element and the rodless cavity of the excavator boom;

[0011] A second potential energy regeneration control element, wherein the first control oil port of the second potential energy regeneration control element is connected to the connecting pipeline where the return oil port of the first main control element is sealed with the rod cavity of the excavator boom, and the second control oil port of the second potential energy regeneration control element is connected to the connecting pipeline where the second control oil port of the first potential energy regeneration control element is connected to the return oil port of the second main control element and the rodless cavity of the excavator boom is sealed;

[0012] A first detection device, which is arranged on a connecting pipeline where the oil return port of the first main control element is sealed with a rod cavity of the excavator boom, and is used to detect and collect the pressure of the rod cavity of the excavator boom in real time;

[0013] The second detection device is arranged on the connecting pipeline where the oil outlet of the second main control element is sealed with the rodless cavity of the excavator boom, and is used for real-time detection and collection of the pressure of the rodless cavity of the excavator boom.

[0014] Furthermore, in the above-mentioned excavator boom potential energy regeneration and reuse control system, the first main control element and the second main control element both include electromagnetic reversing valves.

[0015] Furthermore, in the above-mentioned excavator boom potential energy regeneration and reuse control system, the first main control element includes a four-position six-way electromagnetic reversing valve.

[0016] Furthermore, in the above-mentioned excavator boom potential energy regeneration and reuse control system, the second main control element includes a three-position six-way electromagnetic reversing valve.

[0017] Furthermore, in the above-mentioned excavator boom potential energy regeneration and reuse control system, the first detection device and the second detection device both include pressure sensors.

[0018] Furthermore, in the above-mentioned excavator boom potential energy regeneration and reuse control system, the first potential energy regeneration control element and the second potential energy regeneration control element both include an electromagnetic reversing valve.

[0019] Furthermore, in the above-mentioned excavator boom potential energy regeneration and reuse control system, the first potential energy regeneration control element and the second potential energy regeneration control element both include a two-position two-way electromagnetic reversing valve.

[0020] Furthermore, in the above-mentioned excavator boom potential energy regeneration and reuse control system, a first one-way valve is provided on the second control pipeline, and the first one-way valve is located on the control pipeline from the oil outlet of the first main control element to the accumulator.

[0021] Furthermore, in the above-mentioned excavator boom potential energy regeneration and reuse control system, a second one-way valve is provided at the outlet position of the second control oil port of the second potential energy regeneration control element.

[0022] In a second aspect, the present invention further provides a control method for regenerating and reusing the potential energy of an excavator bucket arm using the above-mentioned control system for regenerating and reusing the potential energy of an excavator bucket arm, comprising:

[0023] Detect the pressure of the rod cavity and rodless cavity of the excavator bucket;

[0024] Determine the pressure of the rod cavity and the rodless cavity of the excavator bucket arm being tested;

[0025] If the pressure in the rod chamber is greater than the pressure in the rodless chamber, the hydraulic oil in the rod chamber is used to replenish the hydraulic oil in the rodless chamber;

[0026] If the pressures in the rod chamber and the rodless chamber are equal or the pressure difference is within the preset range, the accumulator is used to supply oil;

[0027] If the pressure in the rod chamber is lower than the pressure in the rodless chamber, the oil in the rod chamber will return quickly.

[0028] The main advantages of the technical solution of the present invention are as follows:

[0029] The excavator boom potential energy regeneration and reuse control system of the present invention detects the pressure of the boom rod cavity by a first detection device and detects the pressure of the boom rodless cavity by a second detection device. When the rodless cavity of the boom cylinder needs to be replenished with oil, the first main control element and the second main control element can control the first hydraulic pump and the second hydraulic pump to replenish the rodless cavity of the excavator boom cylinder with oil. At the same time, the first potential energy regeneration control element, the second potential energy regeneration control element and the accumulator can realize flow regeneration control of different speed requirements under high, medium and low loads of the boom, thereby achieving optimal utilization of the boom potential energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are used to provide a further understanding of the embodiments of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0031] Figure 1 A hydraulic principle diagram of a control system for regenerating and reusing the potential energy of an excavator arm according to an embodiment of the present invention;

[0032] Figure 2 A schematic flow chart of a control method for regenerating and reusing the potential energy of an excavator arm provided by an embodiment of the present invention;

[0033] Description of reference numerals:

[0034] 1. First hydraulic pump; 2. First main control element; 3. Accumulator; 4. First detection device; 5. First potential energy regeneration control element; 6. Second potential energy regeneration control element; 7. Arm cylinder; 8. Second detection device; 9. Second main control element; 10. Second hydraulic pump. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0036] The technical solution provided by the embodiments of the present invention is described in detail below with reference to the accompanying drawings.

[0037] As attached Figure 1 As shown, an embodiment of the present invention provides a control system for the regeneration and reuse of potential energy of an excavator arm, the system comprising: a first main control element 2, a second main control element 9, an accumulator 3, a first potential energy regeneration control element 5, a second potential energy regeneration control element 6, a first detection device 4 and a second detection device 8, wherein:

[0038] The oil outlet of the first main control component 2 is sealed and connected to the rodless cavity of the excavator boom; the oil outlet of the second main control component 9 is sealed and connected to the rodless cavity of the excavator boom, and the connecting pipeline that seals the oil outlet of the second main control component 9 and the rodless cavity of the excavator boom is connected with a first control pipeline formed by connecting to the control oil outlet of the first main control component 2, and the control oil outlet of the second main control component 9 is connected to the connecting pipeline of the rod cavity of the excavator boom to form a second control pipeline; the accumulator 3 is arranged on the second control pipeline; the first control oil outlet of the first potential energy regeneration control component 5 is connected to the control pipeline connecting the accumulator 3 to the control oil outlet of the second main control component 9, and the second control oil outlet of the first potential energy regeneration control component 5 is connected to the oil outlet of the second main control component 9 and the rodless cavity of the excavator boom. The first detection device 4 is arranged on the connecting pipeline which is sealed and connected between the return oil port of the first main control component 2 and the rod cavity of the excavator boom, and is used for real-time detection and collection of the pressure of the rod cavity of the excavator boom; the second detection device 8 is arranged on the connecting pipeline which is sealed and connected between the oil outlet of the second main control component 9 and the rodless cavity of the excavator boom, and is used for real-time detection and collection of the pressure of the rod cavity of the excavator boom; the second detection device 8 is arranged on the connecting pipeline which is sealed and connected between the oil outlet of the second main control component 9 and the rodless cavity of the excavator boom, and is used for real-time detection and collection of the pressure of the rodless cavity of the excavator boom.

[0039] Specifically, in order to enable the excavator boom potential energy regeneration and reuse control system of the present invention to better realize the first main control element 2, the second main control element 9 in cooperation with the first potential energy regeneration control element 5, the second potential energy regeneration control element 6 and the accumulator 3 to control the oil replenishment and oil return of the boom rod cavity and the rodless cavity under different working conditions, a first hydraulic pump 1 is arranged at the oil inlet of the first main control element 2, and a second hydraulic pump 10 is arranged at the oil inlet of the second main control element 9.

[0040] It should be noted that the first main control element 2, the second main control element 9, the accumulator 3, the first potential energy regeneration control element 5, the second potential energy regeneration control element 6, the first detection device 4 and the second detection device 8 in the excavator boom potential energy regeneration and reuse control system of the present invention can all control the opening of the valve core of the above-mentioned control element and the energy storage of the accumulator 3 according to the results detected by the first detection device 4 and the second detection device 8 through the excavator controller.

[0041] At the same time, in order to facilitate the use of the controller to control the opening of the valve core of the above-mentioned control element and the energy storage of the accumulator 3 according to the detection results of the first detection device 4 and the second detection device 8, to realize the oil unloading of the rod chamber of the boom and the oil replenishment of the rodless chamber, so as to make the boom run smoothly while achieving energy saving and improving the digging ability of the boom, the controller is controlled by an electric operating handle of the boom.

[0042] The principles of the excavator bucket arm potential energy regeneration and reuse control system of the present invention include:

[0043] The first detection device 4 detects the pressure of the rod chamber of the boom, and the second detection device 8 detects the pressure of the rodless chamber of the boom. When the rodless chamber of the boom cylinder 7 needs to be replenished with oil, the first main control component 2 and the second main control component 9 can control the first hydraulic pump 1 and the second hydraulic pump 10 to replenish the rodless chamber of the excavator boom cylinder 7 with oil; specifically, when the second detection device 8 detects that the pressure of the rodless chamber of the boom cylinder 7 is lower than the pressure of the rod chamber, the first main control component 2 and the second main control component 9 control the first hydraulic pump 1 and the second hydraulic pump 10 to realize the oil inlet and return control of the rod chamber and the rodless chamber of the boom cylinder 7, and when the excavator boom enters heavy-load operation, the valve core position of the first main control component 2 is controlled to make the rod chamber of the boom cylinder 7 return oil quickly, thereby achieving the purpose of energy saving and improving the digging ability of the boom; when the pressure of the rod chamber of the boom cylinder 7 detected by the first detection device 4 is greater than the pressure of the boom oil chamber detected by the second detection device 8 When the pressure of the rodless chamber of the boom cylinder 7 is equal to the pressure of the rodless chamber of the boom cylinder 7 detected by the second detection device 4, the second potential energy regeneration control element 6 is closed, and the high-pressure oil in the accumulator 3 passes through the first potential energy regeneration control element 5, combined with the second control element to control the hydraulic oil pumped out by the second hydraulic pump 10 to realize the oil supply to the rodless chamber of the boom cylinder 7; with such a setting, the mutual oil replenishment of the rod chamber and the rodless chamber can reduce the energy waste of the additional external hydraulic oil in the replenishment process, and at the same time avoid the loss of energy in the chamber due to excessive pressure.

[0044] Therefore, the excavator boom potential energy regeneration and reuse control system of the present invention sets a first control circuit and a second control circuit between the first main control element 2 and the second main control element 9 and the boom rodless cavity, and between the second main control element 9 and the first main control element 2 and the boom rod cavity, and by connecting the accumulator 3 and the first potential energy regeneration control element 5 in series on the second control circuit, it is possible to realize potential energy storage and energy compensation at high speed and low load. At the same time, with the cooperation of the second main control element 9 and the second potential energy regeneration control element 6, it is possible to realize potential energy regeneration under different load conditions, that is, it realizes the potential energy regeneration of the return oil of the rod cavity of the boom cylinder 7 in the pre-boom excavation stage, and realizes the timely replenishment of the rodless cavity of the boom cylinder 7 when the boom is in a vertical position, thereby improving the speed and smoothness of the boom excavation, reducing the pressure loss during heavy load, and improving the excavation capacity. At the same time, the first potential energy regeneration control element 5 and the second potential energy regeneration control element 6 are actively controlled by the first main control element 2 and the second main control element 9, and a first detection device 4 is set on the connecting pipeline where the return oil port of the first main control element 2 is sealed with the rod cavity of the excavator boom, and a second detection device 8 is set on the connecting pipeline where the oil outlet of the second main control element 9 is sealed with the rodless cavity of the excavator boom. By detecting and comparing the pressures of the rod cavity and the rodless cavity of the excavator boom cylinder 7, the pressure difference between the rod cavity and the rodless cavity is judged, and the complementarity of the hydraulic oil of the rod cavity and the rodless cavity is adopted to keep the hydraulic oil between the rod cavity and the rodless cavity balanced, thereby ensuring the flow matching of the rod cavity and the rodless cavity of the boom cylinder 7, thereby balancing the pressures of the rod cavity and the rodless cavity of the boom, thereby improving the coordination of the boom movement.

[0045] Preferably, the first main control element 2 and the second main control element 9 both include electromagnetic reversing valves. Most preferably, the first main control element 2 includes a four-position six-way electromagnetic reversing valve. The second main control element 9 includes a three-position six-way electromagnetic reversing valve.

[0046] In this way, by setting the above-mentioned first main control element 2 and second main control element 9 as elements of the electromagnetic reversing valve, during the operation of the excavator, the regenerated flow under different working conditions and different loads can be controlled through the set electromagnetic reversing valve, thereby satisfying the flow regeneration control required at different speeds and achieving the best utilization of different boom potential energies.

[0047] Preferably, the first detection device 4 and the second detection device 8 both include pressure sensors.

[0048] In this way, by arranging a first detection device 4 for real-time detection and collection of the pressure of the rod chamber of the excavator boom on the connecting pipeline that is sealed and connected between the return oil port of the first main control component 2 and the rod chamber of the excavator boom, and by arranging a second detection device 8 for real-time detection and collection of the pressure of the rodless chamber of the excavator boom on the connecting pipeline that is sealed and connected between the oil outlet of the second main control component 9 and the rodless chamber of the excavator boom, the pressure detection of the rodless chamber and the rod chamber of the boom cylinder 7 is more accurate, the flow matching of the rod chamber and the rodless chamber of the boom cylinder 7 is ensured, the pressure of the rod chamber and the rodless chamber is balanced, and the coordination of the boom movement is improved.

[0049] Preferably, the first potential energy regeneration control element 5 and the second potential energy regeneration control element 6 both include electromagnetic reversing valves. Most preferably, the first potential energy regeneration control element 5 and the second potential energy regeneration control element 6 both include two-position two-way electromagnetic reversing valves.

[0050] In the present invention, the function of the first potential energy regeneration control element 5 includes returning oil to the rod chamber of the boom and replenishing oil to the rodless chamber under the control of the first main control element 2; the function of the second potential energy regeneration control element 6 includes replenishing oil to the rodless chamber of the boom under the control of the second control element.

[0051] Specifically, in the excavator boom potential energy regeneration and reuse control system of the present invention, a first one-way valve is provided on the second control pipeline, and the first one-way valve is located on the control pipeline from the return oil port of the first main control element 2 to the accumulator 3. A second one-way valve is provided at the outlet position of the second control oil port of the second potential energy regeneration control element 6.

[0052] In this way, by setting the first one-way valve and the second one-way valve, the excavator boom potential energy regeneration and reuse control system of the present invention is safer in controlling the oil inlet and oil return of the boom rodless cavity. The purpose of the first one-way valve and the one-way valve is to protect the oil circuit.

[0053] Therefore, the excavator boom potential energy regeneration and reuse control system of the present invention can meet the following exemplary flow regeneration control under different working conditions and different loads.

[0054] Working condition 1: Early stage of digging with no load on the bucket arm

[0055] The electric control handle of the dipper arm is operated to perform the digging action, and the action signal is provided to the excavator controller. The excavator controller issues a command to open the first main control element 2 to move to the third position on the left, the second main control element 9 is fully opened, and the second hydraulic pump 10 is controlled to supply oil.

[0056] At this time, the return oil from the rod chamber of the boom cylinder 7 generates high pressure under the gravity of the boom, and the first detection device 4 and the second detection device 8 collect pressure signals in real time and feed them back to the excavator controller. The controller outputs a signal to control the instruction to start the second potential energy regeneration control element 6, thereby realizing the action of the rod chamber of the boom cylinder 7 replenishing oil to the rodless chamber.

[0057] Working condition 2: Late stage of digging with no load on the bucket arm

[0058] When the boom position of the excavator boom cylinder 7 moves to a near vertical position, the potential energy pressure in the rod chamber of the boom cylinder 7 decreases. When the pressure in the rod chamber of the boom cylinder 7 is less than the pressure in the rodless chamber, the controller no longer outputs a current signal, and the first potential energy regeneration control element 5 is closed.

[0059] In order to prevent the speed of the boom cylinder 7 from decaying too quickly, the excavator controller outputs a signal to control the instruction to open the first potential energy regeneration control element 5. At this time, the high-pressure oil in the accumulator 3 further supplements the flow of the rodless chamber of the boom cylinder 7, thereby reducing the decay speed of the boom and ensuring the smooth operation of the boom.

[0060] Working condition 3: Digging with the dipper arm enters heavy-load operation

[0061] When the boom excavation enters heavy-load operation, the first hydraulic pump 1 and the second hydraulic pump 10 have fully met the large cylinder chamber requirements. To reduce the load, the excavator controller controls the first main control element 2 to move to the 4th position, thereby achieving rapid oil return to the rod chamber of the boom cylinder 7, further achieving energy saving and improving the boom excavation capability.

[0062] In summary, the control system for regenerating and reusing the potential energy of the excavator boom ensures that when the excavator boom is digging, the oil in the rod chamber has a stable pressure under the action of the boom's own weight and flows back to the oil tank through the first potential energy regeneration control element 5, the second potential energy regeneration control element 6 and the accumulator 3 to replenish the rodless chamber, thereby avoiding energy waste. At the same time, through the structure of the present invention and the use of the above-mentioned control system, the problem of the rodless chamber being sucked empty due to insufficient oil supply, resulting in pauses in movement and uneven speed can be solved. Through the above-mentioned control system of the present invention, the boom regeneration cut-off pressure is made a variable, which can achieve accurate regeneration under different load conditions, so that the cylinder speed is uniform, and the coordination and smoothness meet actual needs.

[0063] Second, as Figure 2 As shown, the present invention also provides a control method for regenerating and reusing the potential energy of an excavator arm using the above-mentioned control system for regenerating and reusing the potential energy of an excavator arm, comprising:

[0064] Detect the pressure of the rod cavity and rodless cavity of the excavator boom; determine the pressure of the rod cavity and rodless cavity of the detected excavator boom; if the pressure of the rod cavity is greater than the pressure of the rodless cavity, use the hydraulic oil of the rod cavity to replenish the hydraulic oil of the rodless cavity; if the pressure of the rod cavity and the rodless cavity are equal or the pressure difference is within the preset range, use the accumulator to supply oil; if the pressure of the rod cavity is less than the pressure of the rodless cavity, the rod cavity quickly returns oil.

[0065] Therefore, the excavator boom potential energy regeneration control method of the present invention can make the boom regeneration cut-off pressure a variable, can achieve accurate regeneration under different load conditions, make the cylinder speed uniform, and meet actual needs in coordination and smoothness.

[0066] In some optional implementations of the present embodiment, the pressure may be collected by a pressure sensor, the comparison between the pressures may be performed in an excavator controller, and the oil replenishment operations under different working conditions may be implemented using the system of the present invention.

[0067] In order to enable the excavator boom potential energy regeneration control method of the present invention to adapt the excavator boom to different loads and different working conditions during the oil replenishment process, the preset value between the rod cavity and the rodless cavity of the excavator boom is set to the pressure difference of the absolute value of the difference between the two, and the pressure difference is less than or equal to 10.

[0068] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In addition, "front", "back", "left", "right", "upper" and "lower" in this article are all referenced to the placement state shown in the accompanying drawings.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A control system for regenerating and reusing potential energy of an excavator arm, characterized in that: include: A first main control element, wherein an oil outlet of the first main control element is sealedly connected to a rodless cavity of an excavator boom; A second main control element, wherein the oil outlet of the second main control element is sealedly connected to the rodless cavity of the excavator boom, and a first control pipeline connected to the control oil outlet of the first main control element is connected to the connecting pipeline sealedly connected to the rodless cavity of the excavator boom, and the control oil outlet of the second main control element is connected to the connecting pipeline connected to the rod cavity of the excavator boom of the first main control element, so as to form a second control pipeline; an accumulator, wherein the accumulator is arranged on the second control pipeline; A first potential energy regeneration control element, wherein the first control oil port of the first potential energy regeneration control element is connected to a control pipeline connecting the accumulator to the control oil port of the second main control element, and the second control oil port of the first potential energy regeneration control element is connected to a connecting pipeline connecting the oil outlet of the second main control element and the rodless cavity of the excavator boom; A second potential energy regeneration control element, wherein the first control oil port of the second potential energy regeneration control element is connected to the connecting pipeline where the return oil port of the first main control element is sealed with the rod cavity of the excavator boom, and the second control oil port of the second potential energy regeneration control element is connected to the connecting pipeline where the second control oil port of the first potential energy regeneration control element is connected to the return oil port of the second main control element and the rodless cavity of the excavator boom is sealed; A first detection device, which is arranged on a connecting pipeline where the oil return port of the first main control element is sealed with a rod cavity of the excavator boom, and is used to detect and collect the pressure of the rod cavity of the excavator boom in real time; The second detection device is arranged on the connecting pipeline where the oil outlet of the second main control element is sealed with the rodless cavity of the excavator boom, and is used for real-time detection and collection of the pressure of the rodless cavity of the excavator boom.

2. The excavator arm potential energy regeneration and reuse control system according to claim 1, characterized in that: The first main control element and the second main control element both include electromagnetic reversing valves.

3. The excavator arm potential energy regeneration and reuse control system according to any one of claims 1 or 2, characterized in that: The first main control element includes a four-position six-way electromagnetic reversing valve.

4. The excavator arm potential energy regeneration and reuse control system according to any one of claims 1 or 2, characterized in that: The second main control element includes a three-position six-way electromagnetic reversing valve.

5. The excavator arm potential energy regeneration and reuse control system according to claim 1, characterized in that: The first detection device and the second detection device both include a pressure sensor.

6. The excavator arm potential energy regeneration and reuse control system according to claim 1, characterized in that: The first potential energy regeneration control element and the second potential energy regeneration control element both include electromagnetic reversing valves.

7. The excavator arm potential energy regeneration and reuse control system according to any one of claims 1 or 6, characterized in that: The first potential energy regeneration control element and the second potential energy regeneration control element both include a two-position two-way electromagnetic reversing valve.

8. The excavator arm potential energy regeneration and reuse control system according to claim 1, characterized in that: A first one-way valve is arranged on the second control pipeline, and the first one-way valve is located on the control pipeline from the oil outlet of the first main control element to the accumulator.

9. The excavator arm potential energy regeneration and reuse control system according to claim 1, characterized in that: A second one-way valve is arranged at the outlet position of the second control oil port of the second potential energy regeneration control element.

10. A control method for regenerating and reusing the potential energy of an excavator arm using the control system for regenerating and reusing the potential energy of an excavator arm according to any one of claims 1 to 9, characterized in that: include: Detect the pressure of the rod cavity and rodless cavity of the excavator bucket arm; Determine the pressure of the rod cavity and the rodless cavity of the excavator bucket arm being tested; If the pressure in the rod chamber is greater than the pressure in the rodless chamber, the hydraulic oil in the rod chamber is used to replenish the hydraulic oil in the rodless chamber; If the pressures in the rod chamber and the rodless chamber are equal or the pressure difference is within the preset range, the accumulator is used to supply oil; If the pressure in the rod chamber is lower than the pressure in the rodless chamber, the oil in the rod chamber will return quickly.

Images