Centralized filling system, centralized filling control method and working machine

Abstract

The invention relates to the technical field of operation machinery, and discloses a centralized filling system, a centralized filling control method and operation machinery. The control module is in communication connection with the lifting module and used for obtaining the oil state of the oil tank in real time. When the operation machine is in the working state, the filling module is located at the second preset position, and the oil liquid height of the oil tank is lower than the first preset height, the control module needs to drive the lifting module to execute the descending action, so that the filling module descends to the first preset position from the second preset position; when the filling module reaches the first preset position, oil can be filled into the oil tank through the filling module. And under the condition that the oil liquid height of the oil tank reaches the second preset height, the filling module is controlled to stop filling the oil tank, the lifting module is driven by the control module to execute the ascending action, the filling module is made to ascend from the first preset position to the second preset position, and then the operation machine can work normally.

Description

Technical Field

[0001] The present invention belongs to the technical field of operating machinery, and in particular relates to a centralized filling system, a centralized filling control method and an operating machinery. Background Art

[0002] The super-large excavator in the operating machinery has a huge overall structure, and the diesel tank, hydraulic oil tank, and coolant tank are also very large. The filling port is often set very high, which is very inconvenient to fill. Therefore, the oil in these tanks is usually not filled directly at the filling port. It is usually necessary to drive the filling module to descend to the preset position through the oil cylinder before filling the oil. After the oil is filled, the oil cylinder is controlled to drive the filling module to rise. However, it is currently necessary to manually detect the status of the oil tank. When it is determined that oil filling is required, the operator needs to climb onto the turntable and operate the control switch on the turntable to fill it. The operation process is cumbersome and brings climbing risks to the operator. Summary of the invention

[0003] The purpose of the present invention is to provide a centralized filling system, a centralized filling control method and an operating machine to solve the technical problem that it is impossible to intelligently judge whether oil filling is required according to the oil situation in the oil tank during the working process.

[0004] In order to achieve the above object, the present invention provides a centralized filling system, which includes:

[0005] A filling module is used to refill the oil tank of the operating machine;

[0006] A lifting module is connected to the filling module driving and is used to drive the filling module to lift;

[0007] The control module is connected to the lifting module and is configured as follows:

[0008] Obtain the oil status of the oil tank in real time;

[0009] When the oil level in the oil tank is lower than a first preset level, the lifting module is controlled to lower the filling module, so that the filling module is lowered to a first preset position to fill the oil tank;

[0010] When the oil level in the oil tank reaches a second preset height, the filling module is controlled to stop filling the oil tank, and the lifting module is controlled to perform a lifting action on the filling module, so that the filling module rises to a second preset position;

[0011] The first preset position is located below the second preset position, and the first preset height is lower than the second preset height.

[0012] In an embodiment of the present invention, the lifting module includes a first working oil circuit, the centralized filling system also includes a first pull rope switch and a first passive magnetic switch provided on the first working oil circuit, the first passive magnetic switch is provided with a normally open contact and a normally closed contact, and the control module is configured as follows:

[0013] When the oil level in the oil tank is lower than the first preset height, the first pull rope switch is controlled to be turned on, the normally open contact is disconnected, the normally closed contact is in a conducting state, the first working oil circuit is connected and drives the filling module to descend;

[0014] When the filling module descends to the first preset position, the normally closed contact is disconnected, the normally open contact is connected, and the first working oil circuit is disconnected.

[0015] In an embodiment of the present invention, the lifting module further includes an oil pump for pumping hydraulic oil, the centralized filling system further includes a regulating circuit for powering the oil pump, a descending solenoid valve and a first relay switch are provided on the regulating circuit, and the control module is configured as follows:

[0016] When the oil in the oil tank is lower than the first preset height, the first relay switch is turned on, the control and regulation circuit is in a connected state, the oil pump is powered and in a working state, the descending solenoid valve is turned on, the first working oil circuit is connected and drives the filling module to descend;

[0017] When the filling module descends to the first preset position, the first relay switch is closed, the regulating circuit is in a disconnected state, the oil pump loses power and is in a shutdown state, and the descending solenoid valve is closed.

[0018] In an embodiment of the present invention, the lifting module further includes a second working oil circuit, the centralized filling system further includes a second pull rope switch and a second passive magnetic switch provided on the second working oil circuit, the second passive magnetic switch is provided with a normally open contact and a normally closed contact, and the control module is configured as follows:

[0019] When the oil in the oil tank reaches a second preset height, the second pull rope switch is controlled to open, the normally open contact is disconnected, the normally closed contact is in a conducting state, the second working oil circuit is connected and drives the filling module to rise;

[0020] When the filling module rises to the second preset position, the normally closed contact is disconnected, the normally open contact is turned on, and the second working oil circuit is disconnected.

[0021] In an embodiment of the present invention, the lifting module further includes an oil pump for pumping hydraulic oil, the centralized filling system further includes a regulating circuit for powering the oil pump, a rising solenoid valve is provided on the regulating circuit, a second relay switch is provided on the regulating circuit, and the control module is further configured as follows:

[0022] When the oil in the oil tank reaches the second preset height, the second relay switch is turned on, the control and regulation circuit is in a connected state, the oil pump is powered and in a working state, the rising solenoid valve is turned on, the second working oil circuit is connected and drives the filling module to rise;

[0023] When the filling module rises to the second preset position, the second relay switch is closed, the regulating circuit is in a disconnected state, the oil pump loses power and is in a shutdown state, and the rising solenoid valve is closed.

[0024] In an embodiment of the present invention, a centralized filling control method is proposed, which is applied to the centralized filling system as described above. The centralized filling control method includes:

[0025] Obtain the oil status of the oil tank in real time;

[0026] When the oil level in the oil tank is lower than a first preset level, the lifting module is controlled to lower the filling module, so that the filling module is lowered to a first preset position to fill the oil tank;

[0027] When the oil level in the oil tank reaches a second preset height, the filling module is controlled to stop filling the oil tank, and the lifting module is controlled to perform a lifting action on the filling module, so that the filling module rises to a second preset position;

[0028] The first preset position is located below the second preset position, and the first preset height is lower than the second preset height.

[0029] In an embodiment of the present invention, after obtaining the oil state of the oil tank in real time, the method further includes:

[0030] When the oil level in the oil tank reaches a second preset level, obtaining a position signal of the filling module in real time;

[0031] When it is detected that the filling module is not at the second preset position, the lifting module is controlled to perform a lifting action on the filling module until it rises to the second preset position.

[0032] In an embodiment of the present invention, the step of filling the fuel tank further includes:

[0033] During the process of filling the fuel tank, the oil level in the fuel tank is obtained in real time;

[0034] When the oil level reaches the third preset level, a warning alarm is issued;

[0035] The first preset height is lower than the third preset height.

[0036] In an embodiment of the present invention, the centralized filling control method further comprises the steps of:

[0037] When the filling module is in the second preset position, if a control signal is received, the working machine is controlled to start walking and / or rotating action in response to the control signal;

[0038] When the filling module is not in the second preset position, if a control signal is received, the filling module does not respond to the control signal.

[0039] In an embodiment of the present invention, a working machine is further provided, comprising a turntable and the centralized filling system as described above.

[0040] Through the above technical solution, the centralized filling system, centralized filling control method and operating machinery provided by the embodiments of the present invention have the following beneficial effects:

[0041] The centralized filling system in this embodiment includes a filling module, a lifting module and a control module. The filling module is used to add oil to the filling module of the operating machine. The lifting module is connected to the filling module and is used to drive the filling module to lift between a first preset position and a second preset position. The first preset position is located below the second preset position. The control module is connected to the lifting module for communication and is used to obtain the oil status of the oil tank in real time. When the operating machine is in a working state, the filling module is in the second preset position. When the oil height of the oil tank is lower than the first preset height, it is necessary to drive the lifting module through the control module to perform a descending action so that the filling module descends from the second preset position to the first preset position. When the filling module reaches the first preset position, the oil can be added to the oil tank through the filling module. When the oil height of the oil tank reaches the second preset height, the filling module is controlled to stop filling the oil tank, and the lifting module is driven by the control module to perform an ascending action so that the filling module rises from the first preset position to the second preset position, and then the operating machine can work normally; in this way, the oil status can be intelligently judged and intelligent oil filling can be performed.

[0042] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative work. In the accompanying drawings:

[0044] Figure 1 A flowchart of a centralized filling control method according to the present invention;

[0045] Figure 2FIG. 4 is a circuit diagram of a centralized filling system according to the present invention. DETAILED DESCRIPTION

[0046] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0047] The centralized filling system, centralized filling control method and working machine according to the present invention will be described below with reference to the accompanying drawings.

[0048] like Figure 2 As shown, in this embodiment, a centralized filling system is proposed, and the centralized filling system includes a filling module, a lifting module and a control module. The filling module is connected to the oil tank and is used to refill the oil tank of the operating machinery. The distance between the filling module and the oil tank is adjustable, and can be connected by a hose, for example. The lifting module is connected to the filling module and is used to drive the filling module to lift and lower between a first preset position and a second preset position. The control module is communicatively connected to the lifting module and is configured to: obtain the oil status of the oil tank in real time; when the oil height of the oil tank is lower than the first preset height, it is necessary to drive the lifting module through the control module to perform a descending action on the filling module, so that the filling module descends from the second preset position to the first preset position. When the filling module reaches the first preset position, the oil tank can be filled with oil through the filling module. When the oil level in the oil tank reaches a second preset height, the filling module is controlled to stop filling the oil tank, and the lifting module is driven by the control module to perform an ascending action, so that the filling module rises from the first preset position to the second preset position; wherein the first preset position is located below the second preset position, and in actual working process, the first preset position and the second preset position can be set according to actual conditions, and the distance between the two is not limited.

[0049] It should be noted that the filling module is a component used for oil supply on the operating machinery, which is arranged on the operating machinery. When the oil level in the oil tank is lower than the first preset height, it is necessary to drive the lifting module through the control module to perform a descending action, so that the filling module descends from the second preset position to the first preset position. When the filling module reaches the first preset position, oil can be added to the filling module through the filling module. When the oil level in the oil tank reaches the second preset height, the control module drives the lifting module to perform an ascending action, so that the filling module rises from the first preset position to the second preset position. At this time, the operating machinery can work normally.

[0050] In this embodiment, the lifting module includes a lifting cylinder, a first working oil circuit for supplying oil to the lifting cylinder, and an oil pump for pumping hydraulic oil. The centralized filling system also includes a first pull-wire switch L2 and a first passive magnetic switch SQ2 arranged on the first working oil circuit. The first pull-wire switch L2 cooperates with the first passive magnetic switch SQ2 and is used to control the on-off of the hydraulic oil circuit. Among them, the first pull-wire switch L2 and the second pull-wire switch L1 adopt the pull-wire switch in the prior art, which has good safety and high operational reliability. A liquid storage tank and an oil pipe for filling hydraulic oil are also provided in the lifting module. The oil pipe is connected to the liquid storage tank and is used to efficiently fill the liquid storage tank with hydraulic oil, and the first pull-wire switch L2 and the second pull-wire switch L1 are both arranged under the turntable. The first passive magnetic switch SQ2 is electrically connected to the control module and is used to open or close according to the position of the filling module.

[0051] The first working oil circuit and the second working oil circuit are connected to the rodless chamber and the rod chamber of the lifting oil cylinder respectively, and the first working oil circuit and the second working oil circuit are respectively provided with a first passive magnetic switch SQ2 and a second passive magnetic switch SQ1, which have the same structure and each includes a normally open contact and a normally closed contact. The first pull-wire switch L2 is provided in the first working oil circuit and is used to control the on-off of the first working oil circuit, and the second pull-wire switch L1 is provided in the second working oil circuit and is used to control the on-off of the second working oil circuit.

[0052] When the operating machine is in working state, the filling module is located at the second preset position. At this time, if the oil level in the oil tank is lower than the first preset height, the first pull rope switch L2 can be turned on to make the normally closed contact in the conducting state. The oil pump will be energized and the hydraulic oil will be filled into the rod chamber of the lifting cylinder through the first working oil circuit, so that the piston rod of the lifting cylinder will retract and drive the filling module to descend. When the filling module descends to the first preset position, the normally closed contact is disconnected and the normally open contact is connected. The oil pump stops pumping hydraulic oil after power failure, and the lifting cylinder stops moving. When the filling module descends to the first preset position, the filling module can be filled with oil through the filling module. When the oil level in the oil tank reaches the second preset height, the second pull-rope switch L1 can be turned on and the normally closed contact can be turned on. The oil pump will be energized and pump the hydraulic oil along the second working oil circuit to the rodless chamber of the lifting cylinder, thereby driving the piston rod of the lifting cylinder to extend and drive the filling module to rise. When the filling module rises to the second preset position, the normally closed contact is disconnected and the normally open contact is connected. The oil pump stops pumping hydraulic oil after power failure, and the lifting cylinder stops moving. At this point, the centralized filling system is completed, and the operating machinery can continue to work normally, or the turntable can be rotated and the operating machinery can be moved. In this way, not only the intelligent filling of oil is realized, but also the operator does not need to climb onto the turntable and operate the control switch on the turntable to realize the rise and fall of the filling mechanism.

[0053] In this embodiment, the centralized filling system includes a distribution box, the oil pump is an electric pump M1, and the centralized filling system also includes a regulating circuit for powering the electric pump M1. The regulating circuit is provided with a distribution box and a descending solenoid valve YA2, and the distribution box includes a first relay switch and a second relay switch for controlling the on and off of the regulating circuit. Among them, a fuse is also provided in the distribution box to play the role of overcurrent protection to ensure that the entire centralized filling system can work stably and reliably. All fuses and relays are integrated in a distribution box, which reduces the installation space of fuses and relays and facilitates centralized maintenance. Of course, the fuses and relays can also be installed on the turntable in a dispersed manner instead of this centralized installation, so as to avoid multiple functional abnormalities caused by damage to the distribution box in the case of centralized installation.

[0054] When the oil level in the oil tank is lower than the first preset height, first open the first pull-rope switch L2 on the first working oil circuit, so that the normally closed contact is in the conducting state. After the power distribution box is powered on, it is also in the open state and connects the regulating circuit. At this time, the electric pump M1 is powered on and starts to work. The hydraulic oil is filled into the rod chamber of the lifting cylinder through the first working oil circuit, so that the piston rod of the lifting cylinder retracts and drives the filling module to descend. When the filling module descends to the first preset position, the normally closed contact is disconnected and the normally open contact is connected. At this time, the power distribution box loses power and is in the disconnected state. The oil pump loses power and stops pumping hydraulic oil, and the lifting cylinder stops moving. When the filling module descends to the first preset position, the oil tank can be filled with oil through the filling module. When the oil level in the oil tank reaches the second preset height, the second pull-wire switch L1 is turned on and the normally closed contact is in a conducting state. At this time, the power distribution box is also powered on, the oil pump is powered on and pumps the hydraulic oil along the second working oil circuit to the rodless chamber of the lifting cylinder, thereby driving the piston rod of the lifting cylinder to extend and drive the filling module to rise. When the filling module rises to the second preset position, the normally closed contact is disconnected and the normally open contact is connected. At this time, the power distribution box loses power and is in a disconnected state. After the oil pump loses power, it stops pumping hydraulic oil and the lifting cylinder stops moving. In this embodiment, by providing a first passive magnetic switch SQ2 and a second passive magnetic switch SQ1 with normally open contacts and normally closed contacts, the sensitivity of the switch control reaction is improved, so that after the second pull-wire switch L1 and the first pull-wire switch L2 are operated, the rising command or the falling command can be quickly transmitted to the oil pump, so that the lifting cylinder can respond quickly and perform lifting and lowering adjustments.

[0055] Alternatively, sensors with multiple pairs of normally open contacts or multiple pairs of normally closed contacts may be used on the first passive magnetic switch SQ2 or the second passive magnetic switch SQ1 to control and sense the lifting and lowering status of the filling module.

[0056] like Figure 1As shown, in this embodiment, a centralized filling control method for an operating machine is proposed, which is applied to the centralized filling system as above. The centralized filling control method for the operating machine includes:

[0057] S10: obtaining the oil status of the oil tank in real time;

[0058] S20: When the oil level in the oil tank is lower than the first preset level, controlling the lifting module to lower the filling module so that the filling module is lowered to the first preset position to fill the oil tank;

[0059] S30: When the oil level in the oil tank reaches a second preset height, controlling the filling module to stop filling the oil tank, and controlling the lifting module to perform a lifting action on the filling module, so that the filling module rises to a second preset position;

[0060] The first preset position is located below the second preset position, and the first preset height is lower than the second preset height.

[0061] It should be noted that the centralized filling system also includes a lead-acid battery, which is used to provide an energy source for the operation of the centralized filling system, so that when operating the centralized filling system, it is not necessary to start the engine to power the operation of the centralized filling system. The lead-acid battery also needs to provide power for the starter motor of the engine on the operating machinery. In this case, two large-capacity 12V lead-acid batteries are connected in series and then in parallel into three groups as the starting power supply for the centralized filling system. The centralized filling system also includes a main power switch, which is set between the lead-acid battery and the pull rope switch, and the first passive magnetic switch SQ2 and the second passive magnetic switch SQ1 are set on the other side where the main power switch is not provided. The main power switch is used to cut off the connection between the negative pole of the lead-acid battery and the grounding point on the turntable. The main power switch disconnects the power supply of the entire centralized filling system by disconnecting the negative pole. The main power switch of the operating machinery is generally not disconnected when it is in continuous operation. It is recommended to disconnect the main power switch only when the downtime period is long.

[0062] Among them, the electric pump M1 mainly drives the hydraulic motor to rotate through the built-in motor to drive the hydraulic oil to flow, so as to drive the lifting cylinder to perform the rising action or the falling action. The electric pump M1 is equipped with a contactor, which is mainly used to control the on and off of the built-in motor of the electric pump M1, and the coil of the contactor is controlled by the relay inside the distribution box. The electric pump M1 is powered when the relay inside the distribution box is connected, and is in a power-off state when the relay inside the distribution box is disconnected. The distribution box also includes an ascending solenoid valve YA1 for controlling the rise of the filling module and a descending solenoid valve YA2 for controlling the descent of the filling module. The passive magnetic switch includes a first passive magnetic switch SQ2 arranged on the first working oil circuit and a second passive magnetic switch SQ1 arranged on the second working oil circuit. The first relay switch includes a first relay K4 and a second relay K5, and the second relay switch includes a third relay K2 and a fourth relay K3.

[0063] Since the main power switch of the operating machinery is generally in a closed state when it is continuously operating in the open-pit mine, the filling module must rise to the second preset position when the oil in the oil tank is higher than the first preset height. When the oil in the oil tank is lower than the first preset height, the staff should first open the first pull-rope switch L2 at the bottom of the turntable and keep it open. At this time, the 24V DC power of the lead-acid battery will be conducted to the first pull-rope switch L2 through the normally closed contact of the relay K1. At this time, the normally closed contact of the first passive magnetic switch SQ2 is in a conducting state, the first relay K4 is energized synchronously, and the normally open contact of the first relay K4 is energized, thereby enabling the electric pump M1 and the electric pump contactor K6 to be energized, and the normally open contact of the electric pump contactor K6 is energized. After the electric pump contactor K6 is energized, the lead-acid battery supplies power and drives the electric pump M1 motor to work, thereby driving the hydraulic motor to work. Furthermore, after the second relay K5 is energized, the normally open contact of the second relay K5 is attracted and turned on, and the descending solenoid valve YA2 is energized and connected, so that the hydraulic oil passes through the first working oil circuit and is filled into the rod chamber of the lifting cylinder, so that the piston rod of the lifting cylinder is retracted and drives the filling module to descend, and at the same time, the sound and light alarm on the operating machine also starts to flash and alarm, reminding the on-site staff to pay attention to safety. When the filling module descends to the first preset position, the state of the first passive magnetic switch SQ2 changes, the normally closed contact of the first passive magnetic switch SQ2 is in the disconnected state, the first relay K4 and the second relay K5 are synchronously de-energized and disconnected, thereby cutting off the connection between the electric pump M1, the electric pump contactor K6 and the descending solenoid valve YA2, so that the electric pump M1 and the electric pump contactor K6 lose power, the electric pump M1 motor stops pumping hydraulic oil, and the descending solenoid valve YA2 loses power and disconnects. At this time, the lifting cylinder stops moving, the normally open contact of the first passive magnetic switch SQ2 is in the on state, and the arrival signal of the filling module is transmitted to the control module. The control module sends the arrival signal to the display screen through the bus, and the main interface of the display screen shows the status of the filling module descending into place.

[0064] When the oil level in the oil tank reaches the second preset height, the second pull-wire switch L1 is turned on and remains turned on. At this time, the 24V DC power of the lead-acid battery is conducted to the second pull-wire switch L1 through the normally closed contact of the relay K1. The normally closed contact of the second passive magnetic switch SQ1 is in the conducting state, the third relay K2 is energized synchronously, and the normally open contact of the fourth relay K3 is energized, so that after the electric pump M1 and the electric pump contactor K6 are energized, the normally open contact of the electric pump contactor K6 is energized, and after the electric pump contactor K6 is energized, the lead-acid battery supplies power and drives the electric pump M1 motor to work, thereby driving the hydraulic motor to work. Further, after the fourth relay K3 is energized, the normally open contact of the fourth relay K3 is energized, and the rising solenoid valve YA1 is energized and connected, and the oil pump will be energized and pump the hydraulic oil along the second working oil circuit to the rodless chamber of the lifting cylinder, thereby driving the piston rod of the lifting cylinder to extend and drive the filling module to rise. When the filling module rises to the first preset position, the normally closed contact of the second passive magnetic switch SQ1 is in the disconnected state, and the third relay K2 and the fourth relay K3 are disconnected synchronously, thereby cutting off the connection between the electric pump M1, the electric pump contactor K6 and the rising solenoid valve YA1, so that the electric pump M1 and the electric pump contactor K6 lose power, the electric pump M1 motor stops pumping hydraulic oil, and the rising solenoid valve YA1 loses power and disconnects. At this time, the lifting cylinder stops moving, the normally open contact of the second passive magnetic switch SQ1 is in the conducting state, and the in-place signal of the filling module is transmitted to the control module, and the control module sends the in-place signal to the display screen through the bus. The main interface of the display screen displays the state that the filling module has risen to the position, and the sound and light alarm stops alarming and flashing. Among them, in the initial state, the first pull rope switch L2 and the second pull rope switch L1 are both in the disconnected state, and the normally closed contacts in the first passive magnetic switch SQ2 and the second passive magnetic switch SQ1 are in the conducting state.

[0065] In this embodiment, after obtaining the oil state of the oil tank in real time, the method further includes:

[0066] When the oil level in the oil tank reaches a second preset level, obtaining a position signal of the filling module in real time;

[0067] When it is detected that the filling module is not at the second preset position, the lifting module is controlled to perform a lifting action on the filling module until it rises to the second preset position.

[0068] This embodiment also takes into account the possibility of internal leakage of the lifting cylinder. For example, during the normal operation of the operating machine, the lifting cylinder may leak internally, causing the filling module to drop and move toward the first preset position, which may easily cause the filling module to collide with hard objects on the ground and be damaged. Therefore, this embodiment adds a control module to control the rising action of the filling module. That is, during the normal operation of the operating machine, if the control module detects that the filling module has dropped, it will automatically output a signal to control the filling module to perform the rising action. When the filling module rises to the second preset position, it stops outputting, and the internal leakage is fed back to the display screen through the control module to alert the staff.

[0069] Furthermore, when the engine speed is not less than 750 revolutions per minute, when the normally open contact of the first passive magnetic switch SQ2 is in the disconnected state, it can be determined that the filling module is not in the second position. By turning on the oil pump, the rising solenoid valve YA1 is energized, thereby driving the lifting cylinder to rise. If the filling module reaches the second preset position, the internal leakage of the lifting cylinder is fed back to the staff through the display screen.

[0070] In this embodiment, the centralized filling system further includes an early warning unit, which is electrically connected to the control module. The early warning unit includes a liquid level sensor, and the current oil level in the oil tank is obtained by the liquid level sensor disposed in the oil tank. The step of filling the oil tank further includes:

[0071] During the process of filling the fuel tank, the oil level in the fuel tank is obtained in real time;

[0072] When the oil level reaches the third preset level, a warning alarm is issued;

[0073] The first preset height is lower than the third preset height.

[0074] This embodiment can timely obtain the oil volume information in the oil tank and feed it back to the control module by setting an early warning unit. The early warning unit also includes a liquid level indicator light electrically connected to the liquid level sensor. When the oil volume reaches the third preset height, a warning is issued, and the liquid level indicator light turns red, which promptly reminds the staff that the oil in the oil tank is about to be filled. Furthermore, when the oil volume reaches the second preset height, the control module controls the filling module to stop the oil filling, so as to achieve accurate control of the oil filling amount of the filling module, and avoid insufficient and excessive oil filling. Among them, in this embodiment, the first preset height is set when the oil volume reaches 80%, and the third preset height is set when the oil volume reaches 100%. In actual applications, the first preset height, the second preset height and the third preset height can be adjusted according to actual needs.

[0075] In this embodiment, taking the application on an excavator as an example, the centralized filling control method further includes the following steps:

[0076] When the filling module is in the second preset position, if the excavator receives a control signal, it responds to the control signal and controls the working machine to start walking and / or rotating action;

[0077] When the filling module is not in the second preset position, if a control signal is received, the filling module does not respond to the control signal.

[0078] Among them, when the filling module is not in the second preset position, if the control module detects that the excavator has a walking action or a turntable rotation action input, the control module will perform logical operations to limit the excavator's walking and turntable rotation, and display the operation results on the display screen interface, prompting the staff to first raise the filling module to the second preset position before they can walk or drive the turntable to rotate, so as to avoid damage to the filling module due to collision with hard objects on the ground due to the filling module not rising into place.

[0079] In this embodiment, a working machine is also proposed, including a turntable and the centralized filling system as described above. Since the working machine adopts all embodiments of the centralized filling system, it also has all the beneficial effects brought by the centralized filling system, which will not be described in detail here. Among them, the working machine includes an extra-large working machine, etc. For example, in this application, the centralized filling system in this embodiment is applied to a tractor as an example for explanation.

[0080] The centralized filling system includes a first pull-rope switch L2 and a second pull-rope switch L1 arranged below the turntable and corresponding to the first preset position, which facilitates the staff to open or close the first pull-rope switch L2 and the second pull-rope switch L1, avoiding the inconvenience caused by the prior art that the staff must climb onto the turntable to control the lifting and lowering of the filling module. The control module is a controller, which is electrically connected to a display provided on the operating machine, and can feed back the position information of the filling module to the display, so that the staff can conveniently check the position of the filling module through the display.

[0081] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0082] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0083] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0084] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A centralized filling system, characterized in that: The centralized filling system comprises: A filling module is used to refill the oil tank of the operating machine; A lifting module, drivingly connected to the filling module and used to drive the filling module to lift; A control module is connected to the lifting module and is configured to: Acquiring the oil status of the oil tank in real time; When the oil level in the oil tank is lower than a first preset level, controlling the lifting module to lower the filling module, so that the filling module is lowered to a first preset position to fill the oil tank; When the oil level in the oil tank reaches a second preset height, the filling module is controlled to stop filling the oil tank, and the lifting module is controlled to lift the filling module so that the filling module rises to a second preset position; The first preset position is located below the second preset position, and the first preset height is lower than the second preset height.

2. The centralized filling system according to claim 1, characterized in that: The lifting module includes a first working oil circuit, the centralized filling system also includes a first pull rope switch and a first passive magnetic switch provided on the first working oil circuit, the first passive magnetic switch is provided with a normally open contact and a normally closed contact, and the control module is configured as follows: When the oil level in the oil tank is lower than a first preset height, the first pull-rope switch is controlled to be turned on, the normally open contact is disconnected, the normally closed contact is in a conducting state, the first working oil circuit is connected and drives the filling module to descend; When the filling module descends to the first preset position, the normally closed contact is disconnected, the normally open contact is connected, and the first working oil circuit is disconnected.

3. The centralized filling system according to claim 2, characterized in that: The lifting module further includes an oil pump for pumping hydraulic oil, the centralized filling system further includes a regulating circuit for powering the oil pump, the regulating circuit is provided with a descending solenoid valve and a first relay switch, and the control module is configured as follows: When the oil in the oil tank is lower than a first preset height, the first relay switch is turned on, controlling the regulating circuit to be in a connected state, the oil pump is powered and in a working state, the descending solenoid valve is turned on, the first working oil circuit is connected and drives the filling module to descend; When the filling module descends to the first preset position, the first relay switch is closed, the regulating circuit is in a disconnected state, the oil pump loses power and is in a shutdown state, and the descending solenoid valve is closed.

4. The centralized filling system according to claim 1, characterized in that: The lifting module further includes a second working oil circuit, the centralized filling system further includes a second pull rope switch and a second passive magnetic switch provided on the second working oil circuit, the second passive magnetic switch is provided with a normally open contact and a normally closed contact, and the control module is configured as follows: When the oil in the oil tank reaches a second preset height, the second pull-rope switch is controlled to be turned on, the normally open contact is disconnected, the normally closed contact is in a conducting state, the second working oil circuit is connected and drives the filling module to rise; When the filling module rises to the second preset position, the normally closed contact is disconnected, the normally open contact is turned on, and the second working oil circuit is disconnected.

5. The centralized filling system according to claim 4, characterized in that: The lifting module further includes an oil pump for pumping hydraulic oil, the centralized filling system further includes a regulating circuit for powering the oil pump, a rising solenoid valve is provided on the regulating circuit, a second relay switch is provided on the regulating circuit, and the control module is further configured as follows: When the oil in the oil tank reaches a second preset height, the second relay switch is turned on, controlling the regulating circuit to be in a connected state, the oil pump is powered and in a working state, the ascending solenoid valve is turned on, the second working oil circuit is connected and drives the filling module to ascend; When the filling module rises to the second preset position, the second relay switch is closed, the regulating circuit is in a disconnected state, the oil pump loses power and is in a shutdown state, and the rising solenoid valve is closed.

6. A centralized filling control method, characterized in that: Applied in the centralized filling system according to any one of claims 1 to 5, the centralized filling control method comprises: Obtain the oil status of the oil tank in real time; When the oil level in the oil tank is lower than a first preset level, the lifting module is controlled to lower the filling module, so that the filling module is lowered to a first preset position to fill the oil tank; When the oil level in the oil tank reaches a second preset height, the filling module is controlled to stop filling the oil tank, and the lifting module is controlled to lift the filling module so that the filling module rises to a second preset position; The first preset position is located below the second preset position, and the first preset height is lower than the second preset height.

7. The centralized filling control method according to claim 6, characterized in that: After the oil state of the oil tank is obtained in real time, the method further includes: When the oil level in the oil tank reaches a second preset level, obtaining a position signal of the filling module in real time; When it is detected that the filling module is not at the second preset position, the lifting module is controlled to perform a lifting action on the filling module until it rises to the second preset position.

8. The centralized filling control method according to claim 6, characterized in that: The step of filling the oil tank further comprises: obtaining the oil level in the oil tank in real time during the process of filling the oil tank; When the oil level reaches a third preset level, a warning alarm is issued; Wherein, the first preset height is lower than the third preset height.

9. The centralized filling control method according to claim 6, characterized in that: The centralized filling control method further comprises the steps of: When the filling module is in the second preset position, if a control signal is received, the filling module responds to the control signal and controls the working machine to start walking and / or rotating action; When the filling module is not in the second preset position, if a control signal is received, the filling module does not respond to the control signal.

10. A working machine, characterized in that: The invention comprises a turntable and a centralized filling system according to any one of claims 1 to 5.

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