Oil quantity detection device and control method of explosion-proof forklift truck

Abstract

The application discloses an oil quantity detection device and control method of an explosion-proof forklift, wherein an oil quantity sensor is arranged in an oil tank, can output an oil quantity signal based on the residual oil quantity in the oil tank, so that a controller in the explosion-proof tank converts the oil quantity signal into an oil quantity display signal and an oil quantity alarm signal, and an oil quantity prompt module arranged at an instrument panel on the back of a steering wheel of the explosion-proof forklift can display the residual oil quantity of the oil tank and give an oil quantity shortage prompt. In the application, the modules are connected through signal transmission to give a residual oil quantity prompt, so that the oil quantity prompt module can be arranged at the instrument panel on the back of the steering wheel of the explosion-proof forklift, the residual oil quantity can be easily checked by a driver and timely refueling can be realized, explosion-proof forklifts are prevented from being extinguished due to insufficient oil quantity during operation and inability to be refueled in time, and the first safety fence and the second safety fence can perform power amplification processing or power reduction processing on signals between the oil quantity sensor, the controller and the oil quantity prompt module, and can also ensure safe operation of the explosion-proof forklift.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of explosion-proof forklift control, in particular to an oil quantity detection device and control method of explosion-proof forklift. BACKGROUND

[0002] In the prior art, a mechanical oil gauge is usually used to detect the remaining oil quantity in the oil tank of the forklift. Specifically, a float in the mechanical oil gauge is arranged in the oil tank, and the float will float up and down with the high and low of the oil level in the oil tank. The float is actually a variable resistor, and as the oil level decreases, the position of the float changes, resulting in an increase in the output resistance and a decrease in the output voltage, and the indication on the instrument decreases accordingly to show the oil quantity in the oil tank. Therefore, the distance between the float and the instrument should not be too far, and the instrument is arranged at the oil tank, that is, when it is necessary to check the oil quantity in the oil tank, the hood of the explosion-proof forklift needs to be opened to check the instrument, which is not convenient for the driver to obtain the remaining oil quantity in the oil tank of the explosion-proof forklift in time and add oil in time, and may cause the explosion-proof forklift to stall due to insufficient oil quantity during operation. SUMMARY

[0003] The purpose of the present application is to provide an oil quantity detection device and control method of explosion-proof forklift, and signals are transmitted between modules to prompt the remaining oil quantity, so that the oil quantity prompting module can be arranged at the instrument panel at the back of the steering wheel of the explosion-proof forklift, which is convenient for the driver to check the remaining oil quantity and add oil in time, and avoids the explosion-proof forklift stalling due to insufficient oil quantity and inability to add oil in time during operation, and the first safety barrier and the second safety barrier can perform power amplification processing or power reduction processing on the signals between the oil quantity sensor, the controller and the oil quantity prompting module, and also ensure the safe operation of the explosion-proof forklift.

[0004] To solve the above technical problems, the present application provides an oil quantity detection device of explosion-proof forklift, which is applied to an explosion-proof forklift and includes:

[0005] An oil quantity sensor arranged in an oil tank and configured to output an oil quantity signal based on the remaining oil quantity in the oil tank;

[0006] A first safety barrier arranged between the oil quantity sensor and a controller and configured to perform power amplification processing on the oil quantity signal;

[0007] A controller having an input end connected to the output end of the oil quantity sensor and arranged in an explosion-proof box, and configured to convert the oil quantity signal after amplification into an oil quantity display signal and output an oil quantity alarm signal when determining that the remaining oil quantity in the oil tank is not greater than a preset minimum oil quantity based on the oil quantity signal after amplification;

[0008] A second safety barrier arranged between the controller and an oil quantity prompting module and configured to perform power reduction processing on the signal power of the oil quantity display signal and the oil quantity alarm signal.

[0009] The input end is connected with the output end of the controller, and the oil amount prompt module arranged at the instrument panel on the back of the steering wheel of the explosion-proof forklift is used for displaying the residual oil amount of the oil amount when receiving the oil amount display signal after power reduction processing, and performing oil amount shortage prompt when receiving the oil amount alarm signal after power reduction processing.

[0010] Preferably, the oil amount sensor comprises:

[0011] A variable resistor, a first end of which is connected with a first end of the vehicle-mounted power supply, and a second end of which is connected with a first end of the current detection module, is used for changing its resistance value with the size of the residual oil amount in the oil tank; the resistance value of the variable resistor is negatively correlated with the residual oil amount in the oil tank;

[0012] The current detection module, a second end of which is connected with a second end of the vehicle-mounted power supply, and an output end of which is connected with an input end of the controller, is used for detecting the current passing through the variable resistor, and transmitting the current as the oil amount signal to the controller.

[0013] Preferably, the controller is specifically used for converting the current output by the current detection module after power amplification processing into an oil amount display signal, and outputting an oil amount alarm signal when the current output by the current detection module after power amplification processing is not greater than a preset minimum current, the preset minimum current being a current threshold value set based on the preset oil amount minimum value.

[0014] Preferably, the power supply end of the controller and the oil amount prompt module is connected with a first end of a key switch, and a second end of the key switch is connected with the vehicle-mounted power supply;

[0015] The controller is further used for converting the oil amount signal after power amplification processing into an oil amount display signal after the key switch is turned on and the vehicle-mounted power supply is used for power supply of the controller, and outputting an oil amount alarm signal when it is determined based on the oil amount signal after power amplification processing that the residual oil amount in the oil tank is not greater than the preset oil amount minimum value;

[0016] The oil amount prompt module is further used for displaying the residual oil amount of the oil amount when receiving the oil amount display signal after power reduction processing after the key switch is turned on and the vehicle-mounted power supply is used for power supply of the oil amount prompt module, and performing oil amount shortage prompt when receiving the oil amount alarm signal after power reduction processing.

[0017] Preferably, it further comprises:

[0018] A fuse, a first end of which is connected with the power supply end of the controller and the oil amount prompt module, and a second end of which is connected with the first end of the key switch, is used for being fused when the current flowing through the fuse is greater than a preset current.

[0019] Preferably, the oil quantity prompting module comprises:

[0020] an oil quantity meter for displaying the remaining oil quantity of the oil quantity when receiving the oil quantity display signal after the power reduction process;

[0021] an oil quantity lamp for lighting when receiving the oil quantity alarm signal after the power reduction process to prompt the insufficient oil quantity.

[0022] Preferably, the oil quantity detection device further comprises:

[0023] an oil quantity alarm module connected with the output end of the controller and arranged outside the explosion-proof forklift, for alarming the insufficient oil quantity when receiving the oil quantity alarm signal after the power reduction process.

[0024] To solve the above technical problems, the application further provides a control method of an explosion-proof forklift, applied to the oil quantity detection device of the explosion-proof forklift as described above, and the control method of the explosion-proof forklift comprises:

[0025] controlling the explosion-proof forklift to be turned off when it is determined that the remaining oil quantity in the oil tank is not greater than the preset oil quantity minimum value and a preset time has elapsed.

[0026] Preferably, the step of controlling the explosion-proof forklift to be turned off when it is determined that the remaining oil quantity in the oil tank is not greater than the preset oil quantity minimum value and a preset time has elapsed comprises:

[0027] controlling the explosion-proof forklift to be turned off when it is determined that the remaining oil quantity in the oil tank is not greater than the preset oil quantity minimum value and a preset time has elapsed, and the remaining oil quantity in the oil tank is still not greater than the preset oil quantity minimum value.

[0028] Preferably, the control method of the explosion-proof forklift further comprises:

[0029] controlling the explosion-proof forklift to be turned off when it is determined that the temperature of the oil tank is not less than a preset temperature threshold.

[0030] The application provides an oil quantity detection device and control method of an explosion-proof forklift, wherein an oil quantity sensor is arranged in an oil tank, and can output an oil quantity signal based on the residual oil quantity in the oil tank, so that a controller in an explosion-proof box converts the oil quantity signal into an oil quantity display signal and an oil quantity alarm signal, and an oil quantity prompt module arranged at an instrument panel at the back of a steering wheel of the explosion-proof forklift can display the residual oil quantity of the oil tank and prompt insufficient oil quantity. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0032] Figure 1 A structural schematic diagram of an oil quantity detection device of an explosion-proof forklift provided by the present application;

[0033] Figure 2 A specific structural schematic diagram of an oil quantity detection device of an explosion-proof forklift provided by the present application. DETAILED DESCRIPTION

[0034] The core of the present application is to provide an oil quantity detection device and control method of an explosion-proof forklift, and the modules are connected through signal transmission to prompt the residual oil quantity, so that the oil quantity prompt module can be arranged at the instrument panel at the back of the steering wheel of the explosion-proof forklift, which is convenient for the driver to check the residual oil quantity and timely add oil, avoids the explosion-proof forklift from being out of oil and unable to be refueled in time, and thus causes the explosion-proof forklift to be out of fuel, and the first safety barrier and the second safety barrier can perform power amplification processing or power reduction processing on the signals between the oil quantity sensor, the controller and the oil quantity prompt module, and also can ensure the safe operation of the explosion-proof forklift.

[0035] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0036] Please refer to Figure 1 , Figure 1 A structure diagram of an oil quantity detection device of an explosion-proof forklift is provided in the present application. The device is applied to an explosion-proof forklift and comprises:

[0037] An oil quantity sensor 1 is arranged in an oil tank and is used to output an oil quantity signal based on the remaining oil quantity in the oil tank;

[0038] A first safety barrier L1 is arranged between the oil quantity sensor 1 and a controller 2 and is used to perform power amplification processing on the oil quantity signal;

[0039] The controller 2 is connected with the output end of the oil quantity sensor 1 and is arranged in an explosion-proof box. The controller 2 is used to convert the oil quantity signal after the amplification processing into an oil quantity display signal and to output an oil quantity alarm signal when it is determined based on the oil quantity signal after the amplification processing that the remaining oil quantity in the oil tank is not greater than a preset oil quantity minimum value;

[0040] A second safety barrier L2 is arranged between the controller 2 and an oil quantity prompt module 3 and is used to perform power reduction processing on the signal power of the oil quantity display signal and the oil quantity alarm signal;

[0041] The oil quantity prompt module 3 is connected with the output end of the controller 2 and is arranged at an instrument panel at the back of a steering wheel of the explosion-proof forklift. The oil quantity prompt module 3 is used to display the remaining oil quantity of the oil quantity when it receives the oil quantity display signal after the power reduction processing and to perform an oil quantity shortage prompt when it receives the oil quantity alarm signal after the power reduction processing.

[0042] The float of the mechanical oil gauge of the explosion-proof forklift in the prior art is arranged in the oil tank, and the instrument is arranged at the oil tank opening. The instrument is connected with the float. The float floats up and down with the oil amount in the oil tank. The float corresponds to a variable resistor. The lower the oil level, the greater the distance between the float and the instrument, that is, the greater the resistance value, and the lower the oil amount displayed on the instrument. The higher the oil level, the smaller the distance between the float and the instrument, that is, the smaller the resistance value, and the greater the oil amount displayed on the instrument. The structure of the mechanical oil gauge makes the distance between the float and the instrument not too large. Therefore, the instrument is arranged at the oil tank opening, and the oil tank is usually arranged below the driver's seat. When the driver wants to check the remaining oil amount in the explosion-proof forklift oil tank, the driver needs to get off the vehicle, open the seat, and check the instrument at the oil tank opening. Obviously, this way is not convenient for the driver to determine the remaining oil amount in the oil tank in time, which may cause the explosion-proof forklift to stall due to insufficient oil amount in the oil tank during operation. At this time, it is not convenient to add oil, and the normal work cannot be ensured.

[0043] Based on this, the oil amount detection device in the application includes an oil amount sensor 1, a safety barrier L1, a controller 2, a safety barrier L2, and an oil amount prompting module 3. The modules are connected through signal transmission rather than simple resistance voltage transmission. Therefore, the distance between the oil amount sensor 1, the safety barrier L1, the controller 2, the safety barrier L2, and the oil amount prompting module 3 is not limited. The oil amount sensor 1 can be arranged in the oil tank, and the oil amount prompting module 3 can be arranged at the instrument panel on the back of the steering wheel of the explosion-proof forklift. Therefore, it is convenient for the driver to check the remaining oil amount in the oil tank, and the oil amount can be supplemented in time when the oil amount is insufficient.

[0044] Considering that the oil amount detection device in the application is mainly applied to the explosion-proof forklift, in order to perform explosion-proof protection, the controller 2 is arranged in the explosion-proof box because the signal power processed by the controller 2 is large. The oil amount signal output by the oil amount sensor 1 has small power and can be arranged in the dangerous area of the explosion-proof forklift. The oil amount signal is processed by the first safety barrier L1 to amplify the power and then transmitted to the controller 2 in the explosion-proof box. The controller 2 judges the remaining oil amount based on the oil amount signal and transmits the oil amount display signal and the oil amount alarm signal to the second safety barrier L2 to reduce the power after the judgment is completed. This is to avoid explosion caused by too large signal power. The safety barrier can effectively isolate the field loop signal in the dangerous area (non-essential safety) and the loop signal in the safety area (essential safety). The safety barrier can realize bidirectional transmission of electrical signals and can limit the energy transfer from the safety area to the dangerous area caused by faults, reduce the risk of explosion, enhance the anti-interference ability of the detection and control loop, improve the system reliability, meet the national standard explosion-proof requirements, and need to be explained that the area in the explosion-proof box is the safety area, and the area outside the explosion-proof box is the dangerous area.

[0045] The oil quantity sensor 1 and the first safety barrier L1 are connected through the intrinsic safety energy limiting circuit, the intrinsic safety energy limiting circuit converts the oil quantity signal output by the oil quantity sensor 1 into voltage, such as a direct current of 0.2V-1V, and then sends the signal into the first safety barrier L1 for collection, amplification, operation and anti-interference processing, and then the signal is modulated into an output isolated current and voltage signal through a transformer between the first safety barrier and the controller, and then the signal is transmitted to the controller 2.

[0046] It should be noted that the controller 2 and the second safety barrier L2 can transmit signals through a CAN cable, and the second safety barrier L2 and the oil quantity prompt module 3 can transmit signals through a CAN cable.

[0047] In the embodiment, the explosion-proof box is arranged, the first safety barrier L1 and the second safety barrier L2 are connected, the remaining amount of the oil of the explosion-proof forklift can be detected and displayed, and the safety of the explosion-proof forklift can be ensured.

[0048] In addition, the oil quantity prompt module 3 can not only facilitate the driver to check the remaining amount of the oil tank, but also can prompt the driver when the remaining amount of the oil tank is less than the preset minimum oil amount, so that the driver can be prompted when the driver is focused on work and cannot be distracted to check the remaining amount of the oil.

[0049] In summary, the oil quantity sensor 1, the controller 2 and the oil quantity prompt module 3 in the application transmit signals to prompt the remaining amount of the oil, so that the oil quantity prompt module 3 can be arranged at the instrument panel at the back of the steering wheel of the explosion-proof forklift, the driver can check the remaining amount of the oil and timely refuel, and the explosion-proof forklift can be prevented from being out of fuel and being unable to refuel in time and being turned off.

[0050] On the basis of the above embodiment:

[0051] Please refer to Figure 2 , Figure 2 The specific structure diagram of the oil quantity detection device of the explosion-proof forklift is provided.

[0052] As a preferred embodiment, the oil quantity alarm module 4 arranged outside the explosion-proof forklift is further included.

[0053] The input end is connected with the output end of the controller 2, and the oil quantity alarm module 4 arranged outside the explosion-proof forklift is used to alarm the insufficient oil when receiving the oil alarm signal.

[0054] In the embodiment, the oil quantity alarm module 4 can be arranged outside the explosion-proof forklift, when the driver does not drive the explosion-proof forklift or the driver does not notice the remaining amount of the oil tank, but the remaining amount of the oil is insufficient, the personnel outside the explosion-proof forklift can know the insufficient oil in time and supplement the oil.

[0055] The oil quantity alarm module 4 can perform sound and / or light alarm, wherein the sound alarm can timely prompt the insufficient remaining oil quantity when the line of sight is blocked, and the light alarm can timely prompt the insufficient remaining oil quantity when the environment is noisy, and can be selected according to actual needs.

[0056] As a preferred embodiment, the oil quantity alarm module 4 comprises:

[0057] a sound prompt circuit for performing sound alarm when receiving the oil quantity alarm signal;

[0058] a light prompt circuit for performing light alarm when receiving the oil quantity alarm signal.

[0059] In the embodiment, the sound prompt circuit can perform sound alarm, and the light prompt circuit can perform light alarm. The sound prompt circuit and the light prompt circuit are separated, and can be arranged at different positions. The sound prompt circuit can be arranged in the middle of the explosion-proof forklift, and the light prompt circuit can be arranged on the roof of the forklift. The application is not limited in this regard, and the operator can know the insufficient oil quantity.

[0060] As a preferred embodiment, the sound prompt circuit is a loudspeaker or a buzzer, and the light prompt circuit is a display screen or an LED (light-emitting diode) lamp.

[0061] The sound prompt circuit in the embodiment can be a loudspeaker or a buzzer, which is simple to operate and low in cost. The loudspeaker can play different music to prompt the oil quantity, and the buzzer can set the sound frequency to prompt the oil quantity.

[0062] The light prompt circuit can be a display screen or an LED lamp. The display screen can not only prompt the insufficient oil quantity, but also display the remaining oil quantity in the tank, and can integrate different prompt information, which is more functional. The LED lamp is simple in structure and convenient to operate, and can select different colors of LED lamps to perform different prompts. The application is not limited in this regard.

[0063] As a preferred embodiment, the oil quantity sensor 1 comprises:

[0064] a variable resistor, a first end of which is connected with a first end of the vehicle-mounted power supply E, and a second end of which is connected with a first end of the current detection module, for changing the resistance value of itself with the size of the remaining oil quantity in the tank; the resistance value of the variable resistor is negatively correlated with the remaining oil quantity in the tank;

[0065] a current detection module, a second end of which is connected with a second end of the vehicle-mounted power supply E, and an output end of which is connected with an input end of the controller 2, for detecting the current passing through the variable resistor, and transmitting the current as an oil quantity signal to the controller 2.

[0066] In the embodiment, the oil amount sensor 1 specifically can include a variable resistor and a current detection module. The variable resistor is arranged in the oil tank. When the oil amount in the oil tank is sufficient, the part of the variable resistor above the oil surface is small, the resistance of the variable resistor is small, the current flowing through the variable resistor is large, and the current output by the current detection module is large. When the oil amount in the oil tank is insufficient, the part of the variable resistor above the oil surface is large, the resistance of the variable resistor is large, the current flowing through the variable resistor is small, and the current output by the current detection module is small. When the variable resistor is installed, the position of the oil amount in the oil tank being the preset minimum oil amount can be determined first, the lowermost part of the variable resistor is leveled with the preset minimum oil amount, and when the resistance of the variable resistor is maximum, the oil amount in the oil tank is the preset minimum oil amount. The controller 2 can determine whether the oil amount in the oil tank is insufficient based on this. It should be noted that the preset minimum oil amount is not 0, but can be 10% of the maximum oil amount that the oil tank can hold, so that the driver can complete the current work with the remaining oil amount and then supplement the oil amount when the driver knows that the oil amount is insufficient. Of course, the present application is not limited in this regard.

[0067] The current detection module includes a current detection resistor connected between the variable resistor and the vehicle power supply E and a current sensor connected in parallel with the current detection resistor. The current detection resistor is connected in series with the variable resistor. The voltage of the vehicle power supply E remains unchanged under normal circumstances. Therefore, the current flowing through the current detection resistor is the same as the current flowing through the variable resistor. The current sensor can collect the current flowing through the current detection resistor to collect the current flowing through the variable resistor. The current detection resistor can be arranged outside the oil tank. Of course, the present application is not limited in this regard.

[0068] As a preferred embodiment, the controller 2 is specifically configured to convert the current output by the current detection module after power amplification processing into an oil amount display signal, and output an oil amount alarm signal when the current output by the current detection module after power amplification processing is not greater than a preset minimum current. The preset minimum current is a current threshold set based on the preset minimum oil amount.

[0069] In the embodiment, the controller 2 specifically determines the resistance of the variable resistor based on the current flowing through the variable resistor, thereby determining the remaining oil amount in the oil tank. Specifically, if the oil amount signal, i.e., the current output by the current detection module, is not greater than the preset minimum current, it can be determined that the resistance of the variable resistor is large, the part of the variable resistor above the oil surface is large, the oil surface is low, and the remaining oil amount in the oil tank is insufficient, and oil supplement is needed. If the oil amount signal, i.e., the current output by the current detection module, is greater than the preset minimum current, it can be determined that the resistance of the variable resistor is not large, the part of the variable resistor above the oil surface is not large, the oil surface is not low, and the remaining oil amount in the oil tank is sufficient, and oil supplement is not needed.

[0070] It should be noted that when the preset minimum current is set, it is set according to the preset oil minimum value. For example, if the preset oil minimum value is 10% of the maximum oil capacity of the oil tank, then the preset minimum current is 10% of the maximum current flowing through the variable resistor, and the maximum current flowing through the variable resistor is the minimum resistance value of the variable resistor, that is, the maximum oil capacity of the oil tank and the highest oil level.

[0071] Of course, the current output by the current detection module needs to be power amplified by the first safety barrier L1 before being transmitted to the controller 2.

[0072] As a preferred embodiment, the power supply end of the controller 2 and the oil amount prompting module 3 is connected with the first end of the key switch S, and the second end of the key switch S is connected with the vehicle power supply E;

[0073] The controller 2 is also used to convert the power amplified oil amount signal into an oil amount display signal after the key switch S is turned on and the vehicle power supply E supplies power to itself, and output an oil amount alarm signal when it is determined based on the power amplified oil amount signal that the remaining oil amount in the oil tank is not greater than the preset oil minimum value.

[0074] The oil amount prompting module 3 is also used to display the remaining oil amount of the oil amount after receiving the power reduced oil amount display signal after the key switch S is turned on and the vehicle power supply E supplies power to itself, and to prompt the oil shortage when receiving the power reduced oil amount alarm signal.

[0075] In this embodiment, the oil amount prompting module 3 and the controller 2 can be powered by the vehicle power supply E. When the driver inserts the key into the key switch S and turns on the key switch S, the controller 2 and the oil amount prompting module 3 are powered on, thereby starting to detect and display the remaining oil amount in the oil tank. That is, the driver only needs to turn on the key switch S to check the remaining oil amount in the oil tank, which is simple and easy to operate, and the structure is simpler and the cost is lower compared to the controller 2 and the oil amount prompting module 3 with their own power supply.

[0076] In addition, the oil amount alarm module 4 can also be powered by the vehicle power supply E to save energy consumption.

[0077] As shown in Figure 2 The positive electrode of the vehicle power supply E is connected with the key switch S, the key switch S is connected with the positive electrodes of the oil amount prompting module 3, the controller 2 and the oil amount alarm module 4, and the negative electrode is connected with the negative electrodes of the oil amount prompting module 3, the controller 2 and the oil amount alarm module 4.

[0078] As a preferred embodiment, it further comprises:

[0079] The first end is connected with the power supply end of the controller 2 and the oil amount prompting module 3, and the second end is connected with the fuse FR of the first end of the key switch S, for fusing when the current flowing through the fuse is greater than a preset current.

[0080] In the present application, the fuse FR is arranged between the key switch S and the controller 2 and the oil amount prompting module 3, for fusing when the current in the circuit is too large, so as to protect the circuit.

[0081] As a preferred embodiment, the oil amount prompting module 3 comprises:

[0082] an oil amount meter, for displaying the remaining oil amount of the oil amount when receiving the oil amount display signal after the power reduction processing;

[0083] an oil amount lamp, for lighting when receiving the oil amount alarm signal after the power reduction processing, for prompting the insufficient oil amount.

[0084] In the present embodiment, the oil amount prompting module 3 comprises the oil amount meter and the oil amount lamp, the oil amount meter can display the remaining oil amount of the oil amount when receiving the oil amount display signal, for example, the oil amount meter is divided into multiple oil amount grades, each grade represents different oil amount, for example, if the pointer points to the first grade, the remaining oil amount in the oil tank is not less than 80%, if the pointer points to the second grade, the remaining oil amount in the oil tank is less than 80% but greater than 70%, and so on, which is not limited in the present application. The oil amount lamp can be arranged beside the oil amount meter, and is extinguished when not receiving the oil amount alarm signal, and is lighted when receiving the oil amount alarm signal, so as to prompt the insufficient oil amount when the driver is not convenient to check the oil amount meter, and make the driver replenish the oil amount as soon as possible.

[0085] It should be noted that the oil amount alarm signal can be but is not limited to high level.

[0086] To solve the above technical problem, the present application further provides a control method of the explosion-proof forklift, applied to the oil amount detection device of the explosion-proof forklift as described above, and the control method of the explosion-proof forklift comprises:

[0087] controlling the explosion-proof forklift to be turned off after determining that the remaining oil amount in the oil tank is not greater than a preset oil amount minimum value and a preset time is passed.

[0088] As a preferred embodiment, the controller 2 controls the explosion-proof forklift to be turned off after determining that the remaining oil amount in the oil tank is not greater than a preset oil amount minimum value and a preset time is passed, which comprises:

[0089] controlling the explosion-proof forklift to be turned off after determining that the remaining oil amount in the oil tank is not greater than a preset oil amount minimum value, and a preset time is passed, and the remaining oil amount in the oil tank is still not greater than the preset oil amount minimum value.

[0090] In the embodiment, after determining that the remaining oil in the oil tank is not greater than the preset oil minimum value, the forklift truck is controlled to be turned off in order to protect the forklift truck, so as to avoid the forklift truck running continuously until the oil in the oil tank is consumed, which is inconvenient for oil supplement.

[0091] Alternatively, after determining that the remaining oil in the oil tank is not greater than the preset oil minimum value, the forklift truck is not immediately controlled to be turned off, but after a preset time, it is determined whether the forklift truck is supplemented with oil after determining that the remaining oil in the oil tank is not greater than the preset oil minimum value. By intervaling the preset time, the forklift truck can complete the current work and then supplement the oil. However, if the oil tank is not supplemented with oil, the remaining oil in the oil tank is still not greater than the preset oil minimum value, the forklift truck is controlled to be turned off, so as to avoid the forklift truck running continuously until the oil in the oil tank is consumed, which is inconvenient for oil supplement, or avoid the forklift truck being unable to move and affecting the normal operation of other work. If the forklift truck is supplemented with oil after determining that the remaining oil in the oil tank is not greater than the preset oil minimum value and after the preset time, the forklift truck is not automatically controlled to be turned off.

[0092] The preset time is determined according to the oil consumption speed of the forklift truck and the preset oil minimum value, such as 5 minutes. Of course, the present application is not limited thereto.

[0093] It should be noted that the subject executing the control method of the forklift truck in the present application can be the controller 2. Of course, the present application is not limited thereto.

[0094] As a preferred embodiment, it further comprises:

[0095] When it is determined that the temperature of the oil tank is not less than the preset temperature threshold, the forklift truck is controlled to be turned off.

[0096] In the embodiment, if the temperature of the oil tank is not less than the preset temperature threshold, the forklift truck is also controlled to be turned off in order to protect the forklift truck and the workers, that is, the forklift truck stops working, and the forklift truck can be started by the driver after the temperature of the oil tank decreases to below the preset temperature threshold.

[0097] The temperature of the oil tank can be detected by an additional temperature detection module, or the temperature detection module can be set to detect the working environment temperature of the entire forklift truck, and the forklift truck is also controlled to be turned off when the working environment temperature of the forklift truck is not less than the preset working environment temperature threshold.

[0098] It is also noted that, in this disclosure, relational terms such as first and second, and the like, can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0099] The above description of disclosed embodiments provides enabling concepts for practicing or using the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for detecting the amount of oil in an explosion-proof forklift, characterized by, The application is applied to an explosion-proof forklift, comprising: an oil quantity sensor arranged in an oil tank and configured to output an oil quantity signal based on a remaining oil quantity in the oil tank; a first safety barrier arranged between the oil quantity sensor and a controller and configured to perform power amplification processing on the oil quantity signal; a controller arranged in an explosion-proof box and having an input end connected to an output end of the oil quantity sensor, the controller being configured to convert the oil quantity signal after the power amplification processing into an oil quantity display signal, output an oil quantity alarm signal when determining that the remaining oil quantity in the oil tank is not greater than a preset oil quantity minimum value based on the oil quantity signal after the power amplification processing, and control the explosion-proof forklift to be turned off after determining that the remaining oil quantity in the oil tank is not greater than the preset oil quantity minimum value and a preset time elapses; a second safety barrier arranged between the controller and an oil quantity prompt module and configured to perform power reduction processing on signal powers of the oil quantity display signal and the oil quantity alarm signal; an oil quantity prompt module arranged at an instrument panel on a back of a steering wheel of the explosion-proof forklift and having an input end connected to an output end of the controller, the oil quantity prompt module being configured to display the remaining oil quantity of the oil quantity when receiving the oil quantity display signal after the power reduction processing and perform an oil quantity shortage prompt when receiving the oil quantity alarm signal after the power reduction processing.

2. The explosion-proof forklift oil amount detection device according to claim 1, wherein The oil quantity sensor comprises: a variable resistor having a first end connected to a first end of a vehicle-mounted power supply and a second end connected to a first end of a current detection module, the variable resistor being configured to change its resistance value with the size of the remaining oil quantity in the oil tank, and the resistance value of the variable resistor being negatively correlated with the remaining oil quantity in the oil tank; the current detection module having a second end connected to a second end of the vehicle-mounted power supply and an output end connected to an input end of the controller, the current detection module being configured to detect a current passing through the variable resistor and transmit the current as the oil quantity signal to the controller.

3. The oil amount detecting device for an explosion-proof forklift truck according to claim 2, wherein The controller is specifically configured to convert the current output by the current detection module after the power amplification processing into the oil quantity display signal and output the oil quantity alarm signal when the current output by the current detection module after the power amplification processing is not greater than a preset minimum current, the preset minimum current being a current threshold value set based on the preset oil quantity minimum value.

4. The explosion-proof forklift oil amount detection device according to claim 1, wherein The power supply ends of the controller and the oil quantity prompt module are connected to a first end of a key switch, and a second end of the key switch is connected to the vehicle-mounted power supply; the controller is further configured to convert the oil quantity signal after the power amplification processing into the oil quantity display signal after being powered by the vehicle-mounted power supply when the key switch is turned on, and output the oil quantity alarm signal when determining that the remaining oil quantity in the oil tank is not greater than the preset oil quantity minimum value based on the oil quantity signal after the power amplification processing; the oil quantity prompt module is further configured to display the remaining oil quantity of the oil quantity when receiving the oil quantity display signal after the power reduction processing after being powered by the vehicle-mounted power supply when the key switch is turned on, and perform the oil quantity shortage prompt when receiving the oil quantity alarm signal after the power reduction processing.

5. The fuel level detection device for an explosion-proof forklift truck according to claim 4, wherein The application further comprises: The first end is connected with the power supply end of the controller and the oil amount prompt module, and the second end is connected with the first end of the key switch fuse for fusing when the current flowing through itself is greater than a preset current.

6. The explosion-proof forklift oil amount detection device according to claim 1, wherein The oil amount prompt module comprises: An oil amount instrument for displaying the remaining oil amount of the oil amount when receiving the oil amount display signal after the power reduction processing; An oil amount lamp for lighting to prompt the oil shortage when receiving the oil amount alarm signal after the power reduction processing.

7. The explosion-proof forklift oil amount detection device according to any one of claims 1 to 6, characterized by Further comprising: An oil amount alarm module provided outside the explosion-proof forklift and connected with the output end of the controller for alarming the oil shortage when receiving the oil amount alarm signal after the power reduction processing.

8. A control method of an explosion-proof forklift, characterized by, The control method of the explosion-proof forklift applied to the oil amount detection device of any one of claims 1-7, comprising: Controlling the explosion-proof forklift to be turned off after determining that the remaining oil amount in the oil tank is not greater than a preset oil amount minimum value and a preset time has elapsed.

9. The control method of the explosion-proof forklift truck according to claim 8, characterized by, Controlling the explosion-proof forklift to be turned off after the controller determines that the remaining oil amount in the oil tank is not greater than a preset oil amount minimum value and a preset time has elapsed, comprising: Controlling the explosion-proof forklift to be turned off after determining that the remaining oil amount in the oil tank is not greater than a preset oil amount minimum value and a preset time has elapsed, and if the remaining oil amount in the oil tank is still not greater than the preset oil amount minimum value.

10. The control method of the explosion-proof forklift truck according to claim 8, characterized by, Further comprising: Controlling the explosion-proof forklift to be turned off after determining that the temperature of the oil tank is not less than a preset temperature threshold.

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