Centralized refueling system, centralized refueling control method, and working machine

Abstract

This invention relates to the field of work machinery technology, and discloses a centralized refueling system, a centralized refueling control method, and work machinery. The control module is communicatively connected to the lifting module and is used to acquire the oil level in the tank in real time. When the work machinery is in operation, the refueling module is in a second preset position. If the oil level in the tank is lower than a first preset height, the control module drives the lifting module to descend from the second preset position to the first preset position. Once the refueling module reaches the first preset position, oil can be added to the tank. When the oil level in the tank reaches the second preset height, the control module stops refueling, and the control module drives the lifting module to rise from the first preset position to the second preset position, after which the work machinery can operate normally.

Description

Technical Field

[0001] This invention belongs to the field of work machinery technology, specifically relating to a centralized filling system, a centralized filling control method, and work machinery. Background Technology

[0002] Large excavators, especially those used in heavy machinery, have massive overall structures, including large diesel, hydraulic, and coolant tanks. The filling ports are often located high up, making filling inconvenient. Therefore, filling these tanks is usually not done directly at the filling port. Instead, a hydraulic cylinder lowers the filling module to a preset position for filling, and then the cylinder is used to raise the module back up after filling. Currently, however, manual inspection of the tank status is required. When filling is needed, the operator must climb onto a turntable and operate a control switch located on the turntable. This process is cumbersome and poses a climbing hazard for the operator. Summary of the Invention

[0003] The purpose of this invention is to provide a centralized filling system, a centralized filling control method, and a working machine to solve the technical problem that it is impossible to intelligently determine whether oil filling is needed based on the oil level in the tank during operation.

[0004] To achieve the above objectives, the present invention provides a centralized dispensing system, the centralized dispensing system comprising:

[0005] The refueling module is used to replenish the fuel tank of the operating machinery;

[0006] A lifting module is connected to the filling module and is used to drive the filling module to lift. The lifting module includes a first working oil circuit, a first pull rope switch and a first passive magnetic switch disposed on the first working oil circuit. The first passive magnetic switch is provided with normally open contacts and normally closed contacts.

[0007] The control module, which communicates with the lifting module, is configured as follows:

[0008] Real-time monitoring of fuel level in the tank;

[0009] When the oil level in the tank is lower than the first preset height, the lifting module controls the lowering action of the filling module, controls the first pull rope switch to open, the normally open contact to open, the normally closed contact to be in the conducting state, the first working oil circuit to be opened and drive the filling module to descend, so that the filling module descends to the first preset position. When the filling module descends to the first preset position, the normally closed contact opens, the normally open contact is opened, the first working oil circuit is disconnected. When the filling module reaches the first preset position, oil is added to the tank through the filling module.

[0010] When the oil level in the tank reaches the second preset height, the filling module is controlled to stop filling the tank, and the lifting module is controlled to lift the filling module to the 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, and the centralized filling system further includes a first pull rope switch and a first passive magnetic switch disposed on the first working oil circuit. The first passive magnetic switch has a normally open contact and a normally closed contact. The control module is configured as follows:

[0013] When the oil level in the tank is lower than the first preset height, the first pull rope switch is opened, the normally open contact is opened, the normally closed contact is in the conducting state, the first working oil circuit is opened and the filling module is driven to descend.

[0014] When the filling module descends to the first preset position, the normally closed contact opens and the normally open contact closes, thus disconnecting the first working oil circuit.

[0015] In an embodiment of the present invention, the lifting module further includes an oil pump for pumping hydraulic oil, and the centralized filling system further includes a regulating circuit for supplying power to the oil pump. The regulating circuit is equipped with a lowering solenoid valve and a first relay switch. The control module is configured as follows:

[0016] When the oil level in the tank is lower than the first preset height, the first relay switch is turned on, the control and adjustment circuit is connected, the oil pump is energized and in working condition, the descent solenoid valve is opened, the first working oil circuit is connected and drives the filling module to descend.

[0017] When the refueling module descends to the first preset position, the first relay switch is closed, the regulating circuit is disconnected, the oil pump loses power and stops operating, and the descent solenoid valve is closed.

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

[0019] When the oil level in the tank reaches the second preset height, the second pull rope switch is opened, the normally open contact is opened, the normally closed contact is in the conducting state, the second working oil circuit is opened and the filling module is driven to rise.

[0020] When the filling module rises to the second preset position, the normally closed contact opens, and the normally open contact closes the second working oil circuit.

[0021] In an embodiment of the present invention, the lifting module further includes an oil pump for pumping hydraulic oil, and the centralized filling system further includes a regulating circuit for supplying power to the oil pump. The regulating circuit is equipped with a lifting solenoid valve and a second relay switch. The control module is further configured to:

[0022] When the oil in the tank reaches the second preset height, the second relay switch is turned on, the control and adjustment circuit is connected, the oil pump is energized and in working condition, the lifting solenoid valve is opened, 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 disconnected, the oil pump loses power and stops working, and the rising solenoid valve is closed.

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

[0025] Real-time monitoring of fuel level in the tank;

[0026] When the oil level in the tank is lower than the first preset height, the lifting module controls the lowering action of the filling module, controls the first pull rope switch to open, the normally open contact to open, the normally closed contact to be in the conducting state, the first working oil circuit to be opened and drive the filling module to descend, so that the filling module descends to the first preset position. When the filling module descends to the first preset position, the normally closed contact opens, the normally open contact is opened, the first working oil circuit is disconnected. When the filling module reaches the first preset position, oil is added to the tank through the filling module.

[0027] When the oil level in the tank reaches the second preset height, the filling module is controlled to stop filling the tank, and the lifting module is controlled to lift the filling module to the 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 acquiring the oil status of the oil tank in real time, the method further includes:

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

[0031] When it is detected that the filling module is not in the second preset position, the control lifting module performs 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] The oil level in the tank is monitored in real time during the filling process.

[0034] A warning will be issued when the oil level reaches the third preset level;

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

[0036] In an embodiment of the present invention, the centralized injection control method further includes the following steps:

[0037] When the refueling module is in the second preset position, if a control signal is received, it responds to the control signal and controls the working machinery to start walking and / or rotating actions.

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

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

[0040] Through the above technical solutions, 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 refueling system in this embodiment includes a refueling module, a lifting module, and a control module. The refueling module replenishes oil to the refueling module of the operating machinery. The lifting module is connected to the refueling module and drives the refueling module to move up and down 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 communicatively connected to the lifting module and is used to acquire the oil level in the tank in real time. When the operating machinery is in operation, the refueling module is in the second preset position. If the oil level in the tank is lower than the first preset height, the control module drives the lifting module to descend from the second preset position to the first preset position. Once the refueling module reaches the first preset position, oil can be added to the tank. When the oil level in the tank reaches the second preset height, the control module stops refueling and drives the lifting module to rise from the first preset position to the second preset position, allowing the operating machinery to operate normally. This intelligently determines the oil level and performs intelligent refueling.

[0042] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0043] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. Those skilled in the art can obtain other drawings based on the structures shown in these drawings without any inventive effort. In the drawings:

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

[0045] Figure 2 This is a circuit diagram of the centralized filling system according to the present invention. Detailed Implementation

[0046] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0047] The centralized filling system, centralized filling control method, and operating machinery according to the present invention are described below with reference to the accompanying drawings.

[0048] like Figure 2 As shown, in this embodiment, a centralized refueling system is proposed, comprising a refueling module, a lifting module, and a control module. The refueling module is connected to the oil tank and is used to replenish the oil in the working machinery. The distance between the refueling module and the oil tank is adjustable and can be connected using a hose, for example. The lifting module is connected to the refueling module and is used to drive the refueling module to move up and down between a first preset position and a second preset position. The control module is communicatively connected to the lifting module and configured to: acquire the oil level in the oil tank in real time; when the oil level in the tank is lower than the first preset height, the control module drives the lifting module to perform a lowering action on the refueling module, causing the refueling module to descend from the second preset position to the first preset position. Once the refueling module reaches the first preset position, oil can be added to the oil tank through the refueling module. When the oil level in the tank reaches the second preset height, the control module stops filling the tank and drives the lifting module to perform an upward movement, so that the filling module rises from the first preset position to the second preset position. The first preset position is located below the second preset position. In actual operation, the first and second preset positions can be set according to the actual situation, and the distance between them is not limited.

[0049] It should be noted that the refueling module is a component on the operating machinery used for oil supply, and it is located on the machinery. When the oil level in the tank is lower than the first preset height, the control module drives the lifting module to perform a lowering action, causing the refueling module to descend from the second preset position to the first preset position. Once the refueling module reaches the first preset position, oil can be added to it. When the oil level in the tank reaches the second preset height, the control module drives the lifting module to perform an upward action, causing the refueling module to rise from the first preset position to the second preset position. At this point, the operating machinery can operate normally.

[0050] In this embodiment, the lifting module includes a lifting cylinder, a first working oil circuit supplying oil to the lifting cylinder, and an oil pump for pumping hydraulic oil. The centralized filling system also includes a first pull-rope switch L2 and a first passive magnetic switch SQ2 located on the first working oil circuit. The first pull-rope switch L2 cooperates with the first passive magnetic switch SQ2 to control the on / off state of the hydraulic oil circuit. The first pull-rope switch L2 and the second pull-rope switch L1 are pull-rope switches using existing technology, offering good safety and high operational reliability. The lifting module also includes a reservoir and a hydraulic oil filling pipe. The oil pipe is connected to the reservoir and used for efficiently filling the reservoir with hydraulic oil. Both the first pull-rope switch L2 and the second pull-rope switch L1 are located below the turntable. The first passive magnetic switch SQ2 is electrically connected to the control module and is used to open or close the filling module according to its position.

[0051] The first and second working oil circuits are connected to the rodless and rod-type chambers of the lifting cylinder, respectively. A first passive magnetic switch SQ2 and a second passive magnetic switch SQ1 are respectively installed on the first and second working oil circuits, both having the same structure and including one normally open contact and one normally closed contact. A first pull-rope switch L2 is installed on the first working oil circuit and used to control the on / off state of the first working oil circuit, and a second pull-rope switch L1 is installed on the second working oil circuit and used to control the on / off state of the second working oil circuit.

[0052] When the machinery is in operation and the filling module is in the second preset position, if the oil level in the tank is lower than the first preset height, the first pull rope switch L2 can be activated. This opens the normally closed contact, energizing the oil pump and pumping hydraulic oil through the first working oil circuit into the rod chamber of the lifting cylinder. This causes the piston rod of the lifting cylinder to retract, lowering the filling module. When the filling module reaches the first preset position, the normally closed contact opens, the normally open contact closes, the oil pump loses power and stops pumping hydraulic oil, and the lifting cylinder stops operating. When the filling module reaches the first preset position, oil can be added to the filling module. Once the oil level in the tank reaches the second preset height, the second pull rope switch L1 can be activated, energizing the normally closed contact and pumping hydraulic oil along the second working oil circuit to the rodless chamber of the lifting cylinder. This drives the piston rod of the lifting cylinder to extend and raise the filling module. When the filling module reaches the second preset position, the normally closed contact opens, the normally open contact closes, the oil pump loses power and stops pumping hydraulic oil, and the lifting cylinder stops moving. At this point, the centralized filling system operation is complete, and the working machinery can continue to operate normally, allowing for turntable rotation and movement of the machinery. This not only achieves intelligent oil filling but also eliminates the need for an operator to climb the turntable and operate the control switches located on it to raise and lower the filling mechanism.

[0053] In this embodiment, the centralized refueling system includes a distribution box, an electric pump M1, and a regulating circuit for supplying power to the electric pump M1. The regulating circuit is equipped with the distribution box and a descending solenoid valve YA2. The distribution box includes a first relay switch and a second relay switch for controlling the on / off state of the regulating circuit. The distribution box also contains fuses for overcurrent protection, ensuring the stable and reliable operation of the entire centralized refueling system. All fuses and relays are integrated into a single distribution box, reducing installation space and facilitating centralized maintenance. Alternatively, fuses and relays can be distributed and installed on a turntable instead of this centralized installation, avoiding damage to the distribution box and subsequent malfunctions caused by centralized installation.

[0054] When the oil level in the tank is lower than the first preset height, the first pull-rope switch L2 on the first working oil circuit is first turned on, causing the normally closed contact to be in the conducting state. The power distribution box is also energized and turned on, connecting the regulating circuit. At this time, the electric pump M1 is energized and starts working. Hydraulic oil is added to the rod chamber of the lifting cylinder through the first working oil circuit, causing the piston rod of the lifting cylinder to retract and drive the filling module to descend. When the filling module descends to the first preset position, the normally closed contact opens, and the normally open contact closes. At this time, the power distribution box is de-energized and in the disconnected state, the oil pump stops pumping hydraulic oil, and the lifting cylinder stops moving. When the filling module descends to the first preset position, oil can be added to the tank through the filling module. When the oil level in the tank reaches the second preset height, the second pull rope switch L1 is turned on and the normally closed contact is in the conducting state. At this time, the power distribution box is energized and is also in the open state. The oil pump is energized 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 is de-energized and is in the disconnected state. After the oil pump loses power, it stops pumping hydraulic oil, and the lifting cylinder stops moving. In this embodiment, by setting the first passive magnetic switch SQ2 and the second passive magnetic switch SQ1 with normally open and normally closed contacts, the sensitivity of the switch control response is improved, so that after the second pull rope switch L1 and the first pull rope switch L2 are operated, the rising command or falling command can be quickly transmitted to the oil pump, so that the lifting cylinder can respond quickly and perform lifting adjustment. [1]

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

[0056] like Figure 1 As shown, in this embodiment, a centralized refueling control method for operating machinery is proposed and applied to the centralized refueling system described above. The centralized refueling control method for operating machinery includes:

[0057] S10: Real-time acquisition of oil status in the tank;

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

[0059] S30: When the oil level in the tank reaches the second preset height, control the filling module to stop filling the tank and control the lifting module to lift the filling module to the 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 refueling system also includes lead-acid batteries. These batteries provide the power source for the system's operation, eliminating the need to start the engine to power it. The lead-acid batteries also power the starter motor of the machine's engine. In this case, two high-capacity 12V lead-acid batteries are connected in series and then in parallel to form three groups as the starting power source for the centralized refueling system. The centralized refueling system also includes a main power switch, located between the lead-acid batteries and the pull-cord switch. The first passive magnetic switch SQ2 and the second passive magnetic switch SQ1 are located on the side without the main power switch. The main power switch disconnects the negative terminal of the lead-acid battery from the ground point on the turntable, thus disconnecting the power to the entire centralized refueling system. The main power switch is generally not disconnected during continuous operation; it is only recommended to disconnect it for extended downtime.

[0062] The electric pump M1 primarily uses a built-in electric motor to drive a hydraulic motor, thereby circulating hydraulic oil to power the lifting cylinder and induce lifting or lowering movements. The electric pump M1 includes a contactor, which controls the on / off state of the built-in electric motor. The contactor's coil engagement is controlled by a relay within the distribution box. The electric pump M1 is energized when the relay is connected and de-energized when it is disconnected. The distribution box also includes a lifting solenoid valve YA1 for controlling the lifting of the filling module and a lowering solenoid valve YA2 for controlling the lowering of the filling module. Passive magnetic switches include a first passive magnetic switch SQ2 located on the first working oil circuit and a second passive magnetic switch SQ1 located 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] Because the main power switch is generally closed when the machinery is operating continuously in the open-pit mine, the filling module must be raised to the second preset position when the oil level in the tank is higher than the first preset height. When the oil level in the tank is lower than the first preset height, the operator should first turn on the first pull rope switch L2 under the turntable and keep it open. At this time, the 24V DC power from the lead-acid battery will be conducted to the first pull rope switch L2 through the normally closed contact of relay K1. At this time, the normally closed contact of the first passive magnetic switch SQ2 is in the conducting state, and the first relay K4 is simultaneously energized. The normally open contact of the first relay K4 is energized, which in turn energizes the electric pump M1 and the electric pump contactor K6. The normally open contact of the electric pump contactor K6 is energized, and the lead-acid battery supplies power to drive the electric pump M1 motor, which in turn drives the hydraulic motor. Furthermore, after the second relay K5 is energized, its normally open contact closes, energizing the lowering solenoid valve YA2. This allows hydraulic oil to flow through the first working oil circuit and be added to the rod chamber of the lifting cylinder, causing the piston rod of the lifting cylinder to retract and lower the filling module. Simultaneously, the audible and visual alarm on the working machinery flashes to alert on-site personnel 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, and its normally closed contact opens. The first relay K4 and the second relay K5 are simultaneously de-energized and disconnected, thereby cutting off the connection between the electric pump M1, the electric pump contactor K6, and the lowering solenoid valve YA2. This causes the electric pump M1 and the electric pump contactor K6 to lose power, the electric pump M1 motor to stop pumping hydraulic oil, and the lowering solenoid valve YA2 to de-energize and disconnect. At this time, the lifting cylinder stops moving, the normally open contact of the first passive magnetic switch SQ2 is in the conducting state, and transmits the position signal of the filling module to the control module. The control module sends the position signal to the display screen through the bus, and the main interface of the display screen shows the position of the filling module descending to the position.

[0064] When the oil level in the tank reaches the second preset height, the second pull-rope switch L1 is opened and remains open. At this time, the 24V DC power from the lead-acid battery is supplied to the second pull-rope switch L1 through the normally closed contact of relay K1. The normally closed contact of the second passive magnetic switch SQ1 is in the conducting state, the third relay K2 is energized simultaneously, and the normally open contact of the fourth relay K3 is energized. This energizes the electric pump M1 and the electric pump contactor K6. The normally open contact of the electric pump contactor K6 is then energized, supplying power to the lead-acid battery and driving the electric pump M1 motor, which in turn drives the hydraulic motor. Furthermore, when the fourth relay K3 is energized, its normally open contact is energized, connecting the lifting solenoid valve YA1. The oil pump is then energized and pumps 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 lifting the filling module. When the filling module rises to the first preset position, the normally closed contact of the second passive magnetic switch SQ1 is open, and the third relay K2 and the fourth relay K3 are simultaneously de-energized and disconnected, thereby cutting off the connection between the electric pump M1, the electric pump contactor K6, and the lifting solenoid valve YA1. This causes the electric pump M1 and the electric pump contactor K6 to lose power, the electric pump M1 motor to stop pumping hydraulic oil, and the lifting solenoid valve YA1 to de-energize and disconnect. At this time, the lifting cylinder stops operating, the normally open contact of the second passive magnetic switch SQ1 is in the conducting state, and transmits the filling module's arrival signal to the control module. The control module sends the arrival signal to the display screen via the bus, and the main interface of the display screen shows the status of the filling module rising to the designated position. The audible and visual alarm stops alarming and flashing. In the initial state, both the first pull rope switch L2 and the second pull rope switch L1 are in the open state, and the normally closed contacts of the first passive magnetic switch SQ2 and the second passive magnetic switch SQ1 are in the conducting state.

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

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

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

[0068] This embodiment also considers the possibility of internal leakage in the lifting cylinder. For example, during normal operation of the machinery, internal leakage in the lifting cylinder could cause the refueling module to descend and move towards the first preset position, potentially leading to collision and damage between the refueling module and hard objects on the ground. Therefore, this embodiment adds a control module to control the rising action of the refueling module. Specifically, during normal operation of the machinery, if the control module detects the refueling module descending, it will automatically output a signal to control the refueling module to rise. Once the refueling module reaches the second preset position, the output will stop, and the internal leakage situation will be fed back to the display screen via the control module to alert the operator.

[0069] Furthermore, when the engine speed is not less than 750 rpm, if the normally open contact of the first passive magnetic switch SQ2 is in the open state, it can be determined that the refueling module is not in the second position. By turning on the oil pump, the lifting solenoid valve YA1 is energized, thereby driving the lifting cylinder to rise. If the refueling module reaches the second preset position, the display screen will report to the staff that there is internal leakage in the lifting cylinder.

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

[0071] The oil level in the tank is monitored in real time during the filling process.

[0072] A warning will be issued when the oil level reaches the third preset level;

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

[0074] This embodiment, by setting up an early warning unit, can promptly obtain information on the oil level in the tank and feed it back to the control module. The early warning unit also includes a level indicator light electrically connected to the level sensor. When the oil level reaches the third preset height, the indicator light turns red, promptly reminding the staff that the tank is about to be filled. Furthermore, when the oil level reaches the second preset height, the control module controls the filling module to stop filling, thus achieving precise control of the oil filling amount and avoiding insufficient or excessive filling. In this embodiment, the first preset height is set when the oil level reaches 80%, and the third preset height is set when the oil level reaches 100%. In practical applications, the first, second, and third preset heights can all be adjusted according to actual needs.

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

[0076] When the refueling module is in the second preset position, if the excavator receives a control signal, it will respond to the control signal and control the working machinery to start the walking and / or slewing actions.

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

[0078] When the refueling 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 a logical operation to restrict the excavator's walking and turntable rotation. At the same time, the operation result will be displayed on the display screen, prompting the operator to raise the refueling module to the second preset position before walking or driving the turntable to rotate, so as to avoid damage to the refueling module due to collision with hard objects on the ground if the refueling module is not raised to the correct position.

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

[0080] The centralized refueling system includes a first pull-rope switch L2 and a second pull-rope switch L1 located below the turntable and corresponding to a first preset position. This allows operators to easily open or close the first pull-rope switch L2 and the second pull-rope switch L1, avoiding the inconvenience of having to climb the turntable to operate the refueling module's lifting and lowering in existing technologies. The control module is a controller, electrically connected to a display on the operating machinery. The controller can feed back the position information of the refueling module to the display, allowing operators to conveniently view the module's position status via the display.

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

[0082] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0083] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0084] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A centralized dispensing system, characterized in that, The centralized refueling system includes: The refueling module is used to replenish the fuel tank of the operating machinery; A lifting module is driven and connected to the filling module and used to drive the filling module to lift. The lifting module includes a first working oil circuit, a first pull rope switch and a first passive magnetic switch disposed on the first working oil circuit. The first passive magnetic switch is provided with a normally open contact and a normally closed contact. The control module, which is communicatively connected to the lifting module, is configured as follows: The oil level in the tank can be acquired in real time. When the oil level in the tank is lower than a first preset height, the lifting module is controlled to lower the filling module, the first pull rope switch is opened, the normally open contact is opened, the normally closed contact is in a conductive state, the first working oil circuit is opened and the filling module is lowered to the first preset position. When the filling module is lowered to the first preset position, the normally closed contact is opened, the normally open contact is opened, the first working oil circuit is closed, and when the filling module reaches the first preset position, oil is added to the tank through the filling module. When the oil level in the tank reaches the second preset height, the filling module is controlled to stop filling the tank, and the lifting module is controlled to lift the filling module to the 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 refueling system according to claim 1, characterized in that, The lifting module also includes an oil pump for pumping hydraulic oil, and the centralized filling system also includes a regulating circuit for supplying power to the oil pump. The regulating circuit is equipped with a lowering solenoid valve and a first relay switch. The control module is configured as follows: When the oil level in the tank is lower than the first preset height, the first relay switch is turned on, controlling the regulating circuit to be in a connected state, the oil pump is energized and in working state, the descent solenoid valve is opened, the first working oil circuit is connected and drives the filling module to descend. When the refueling module descends to the first preset position, the first relay switch is turned off, the regulating circuit is disconnected, the oil pump loses power and stops operating, and the descent solenoid valve is closed.

3. The centralized refueling system according to claim 1, characterized in that, The lifting module further includes a second working oil circuit, and the centralized filling system further includes a second pull rope switch and a second passive magnetic switch disposed on the second working oil circuit. The second passive magnetic switch has normally open contacts and normally closed contacts. The control module is configured as follows: When the oil level in the tank reaches the second preset height, the second pull rope switch is opened, the normally open contact is opened, the normally closed contact is in the conducting state, the second working oil circuit is opened, and the filling module is driven to rise. When the filling module rises to the second preset position, the normally closed contact opens, and the normally open contact disconnects the second working oil circuit.

4. The centralized refueling system according to claim 3, characterized in that, The lifting module also includes an oil pump for pumping hydraulic oil, and the centralized filling system also includes a regulating circuit for supplying power to the oil pump. The regulating circuit is equipped with a lifting solenoid valve and a second relay switch. The control module is further configured to: When the oil level in the tank reaches the second preset height, the second relay switch is turned on, controlling the regulating circuit to be in a connected state, the oil pump is energized and in working state, the lifting solenoid valve is opened, 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 second relay switch is closed, the regulating circuit is disconnected, the oil pump loses power and stops operating, and the rising solenoid valve is closed.

5. A centralized injection control method, characterized in that, The centralized refueling control method, applied to any one of claims 1 to 4, comprises: Real-time monitoring of fuel level in the tank; When the oil level in the tank is lower than a first preset height, the lifting module is controlled to lower the filling module, the first pull rope switch is opened, the normally open contact is opened, the normally closed contact is in a conductive state, the first working oil circuit is opened and the filling module is lowered to the first preset position. When the filling module is lowered to the first preset position, the normally closed contact is opened, the normally open contact is opened, the first working oil circuit is closed, and when the filling module reaches the first preset position, oil is added to the tank through the filling module. When the oil level in the tank reaches the second preset height, the filling module is controlled to stop filling the tank, and the lifting module is controlled to lift the filling module to the 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.

6. The centralized injection control method according to claim 5, characterized in that, After acquiring the real-time oil status of the tank, the method further includes: When the oil level in the tank reaches a second preset height, the position signal of the filling module is acquired in real time. When it is detected that the filling module is not in 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.

7. The centralized injection control method according to claim 5, characterized in that, The step of filling the fuel tank further includes: The oil level in the tank is acquired in real time during the filling process. When the oil level reaches the third preset height, a warning will be issued. The first preset height is lower than the third preset height.

8. The centralized injection control method according to claim 5, characterized in that, The centralized injection control method further includes the following steps: When the filling module is in the second preset position, if a control signal is received, it responds to the control signal and controls the working machinery to start walking and / or rotating actions; When the filling module is not in the second preset position, it will not respond to the control signal if it receives a control signal.

9. A type of operating machinery, characterized in that, Includes a turntable and a centralized dispensing system according to any one of claims 1 to 4.

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