Fuel oil filling system and mobile crane

Abstract

The invention discloses a fuel oil filling system and a mobile crane in the technical field of fuel oil filling of mobile cranes. The fuel oil filling system comprises a fuel oil tank assembly, an oil filling device, a control and feedback device and a fuel oil cut-off device. The refueling device is connected with the fuel oil cutting device through a fuel oil pipeline, and the fuel oil cutting device is communicated with the interior of the fuel oil tank assembly. The control and feedback device is installed on the fuel tank assembly and connected with the fuel cut-off device through a feedback line. The control and feedback device is used for detecting an oil injection quantity index and sending a feedback signal to the fuel oil cut-off device when the oil injection quantity index exceeds a set threshold value; the fuel cut-off device is used for receiving the feedback signal and cutting off fuel inlet. An operator can directly finish refueling on the ground, climbing operation is avoided, and the operation safety and the application quality of the whole machine are improved; through linkage cooperation of the control and feedback device and the fuel oil cut-off device, refueling can be automatically stopped in the rapid refueling process, and fuel oil is prevented from overflowing.

Description

Technical Field

[0001] The present invention belongs to the technical field of fuel filling for mobile cranes, and more specifically, relates to a fuel filling system and a mobile crane. Background Art

[0002] A mobile crane is a crane that is equipped with pneumatic tires and requires a special chassis as the running chassis for transfer. The fuel tank layout of a mobile crane is mainly divided into two categories: fixed on both sides of the vehicle frame or fixed above the walkway board. When the fuel tank is arranged on both sides of the vehicle frame, the height of the fuel filling port is relatively low at this time, with good accessibility and convenient refueling. However, due to the limitation of the appearance size and the influence of the overall vehicle space, this layout usually results in a relatively small fuel tank volume, affecting the overall vehicle's cruising range; when the fuel tank is arranged above the walkway board, it can effectively utilize the space while ensuring that the fuel tank has sufficient volume, making the overall layout of the mobile crane compact while ensuring the overall vehicle's cruising range. However, in this layout, the height of the fuel tank from the ground is high, the fuel filling port is not easily accessible, and fuel filling is inconvenient, affecting the humanization level of the overall vehicle. Summary of the Invention

[0003] The purpose of the present invention is to address the above deficiencies, provide a fuel filling system and a mobile crane, solve the problems of poor operability and low efficiency in the existing fuel filling scheme for cranes with fuel tanks arranged above the walkway board, and eliminate the risk of falling from a height or suffering other personal injuries when the operator climbs to fill fuel.

[0004] To achieve the above object, the present invention is realized through the following technical solutions: In a first aspect, the present invention provides a fuel filling system, including a fuel tank assembly, a fuel filling device, a control and feedback device, and a fuel cut-off device; The fuel filling device is connected to the fuel cut-off device through a fuel pipeline, and the fuel cut-off device communicates with the inside of the fuel tank assembly; the control and feedback device is installed on the fuel tank assembly and is connected to the fuel cut-off device through a feedback line; The control and feedback device is used to detect the fuel injection volume index and send a feedback signal to the fuel cut-off device when it exceeds the set threshold; the fuel cut-off device is used to receive the feedback signal and cut off the fuel inlet.

[0005] Further, the fuel filling device includes a fixed frame and a fuel filling port. The fixed frame fixes the fuel filling port outside the vehicle, and the fuel filling port is connected to the fuel cut-off device through a fuel pipeline.

[0006] Further, the interface form of the fuel filling port can be in the form of quick plug, threaded, or clamp type, etc.; fuel filling can adopt the form of pressure filling or gravity filling.

[0007] Further, it further includes an alarm which is arranged on the fuel filling device and communicatively connected with the fuel cut-off device, and emits an alarm signal when the fuel cut-off device cuts off the fuel inlet.

[0008] Further, the alarm is a warning light or a voice alarm.

[0009] Further, the fuel cut-off device includes a hydraulic valve which receives the feedback signal and cuts off the fuel inlet.

[0010] Further, the control and feedback device includes a fuel injection quantity index sensor, and the fuel injection quantity index is the liquid level or pressure in the fuel tank assembly, and the corresponding fuel injection quantity index sensor is a fuel liquid level sensor or a pressure sensor.

[0011] Further, the fuel liquid level sensor includes any one of a float type liquid level sensor, a hydraulic type liquid level sensor, a resistive liquid level sensor or a capacitive liquid level sensor.

[0012] Further, the control and feedback device further includes a pressure protection device which discharges the excessive fuel through the pressure protection device when the system pressure is too high due to overfilling in the fuel tank. The pressure protection device can adopt a two-stage overflow valve.

[0013] Further, the upper surface and the lower surface of the fuel tank assembly are respectively provided with openings. The upper opening is used to connect the control and feedback device, and the lower opening is used to connect the fuel cut-off device. The fuel tank material includes but is not limited to aluminum, iron and plastic materials.

[0014] In a second aspect, the present invention further provides a mobile crane which is configured with the fuel filling system described in the first aspect.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: By connecting the fuel filling port through a fuel pipeline, the operator can directly complete fuel filling on the ground, avoiding high-altitude operations, improving the operation safety and the application quality of the whole machine; through the linkage cooperation of the control and feedback device and the fuel cut-off device, fuel filling can be automatically stopped during the rapid fuel filling process to prevent fuel overflow; The fuel filling system of the present invention can adopt a pressure fuel supply method, which can actively control the fuel flow rate and improve the fuel filling efficiency; The present invention is also provided with an automatic protection device to prevent system damage caused by excessive pressure. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of a fuel filling system provided by an embodiment of the present invention; In the figure: 1. Fuel tank assembly; 2. Fuel filling device; 21. Fixed frame; 22. Fuel filling port; 3. Control and feedback device; 4. Fuel cut-off device; 5. Fuel pipeline; 6. Feedback line. Detailed implementation manners

[0017] The preferred implementation manners of the present invention will be described in more detail below with reference to the accompanying drawings and specific embodiments.

[0018] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0019] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0020] Embodiment 1 As Figure 1 shown, this embodiment provides a fuel filling system, including a fuel tank assembly 1, a fuel filling device 2, a control and feedback device 3, and a fuel cut-off device 4; the fuel filling device 2 is connected to the fuel cut-off device 4 through a fuel pipeline 5, and the fuel cut-off device 4 communicates with the inside of the fuel tank assembly 1; the control and feedback device 3 is installed on the fuel tank assembly 1 and is connected to the fuel cut-off device 4 through a feedback line 6; the control and feedback device 3 is used to detect the fuel injection volume index and send a feedback signal to the fuel cut-off device 4 when it exceeds the set threshold; the fuel cut-off device 4 is used to receive the feedback signal and cut off the fuel inlet.

[0021] Embodiment 2 This embodiment provides a fuel filling system. Based on Embodiment 1, the technical solution is further refined to achieve better technical effects.

[0022] In this embodiment, openings are respectively provided on the upper and lower surfaces of the fuel tank assembly 1. The upper opening is used to connect the control and feedback device 3, and the lower opening is used to connect the fuel cut-off device 4. The material of the fuel tank can be aluminum, iron or plastic according to actual requirements.

[0023] In this embodiment, the control and feedback device 3 includes a fuel injection amount index sensor. In specific use, the fuel injection amount index can be the liquid level or pressure in the fuel tank assembly, and the corresponding fuel injection amount index sensor can be a fuel level sensor or a pressure sensor. The principle is that when the fuel level in the fuel tank rises to the system-set height or pressure, the fuel level sensor or pressure sensor transmits a signal through the feedback line to the fuel cut-off device 4 to stop further fuel filling.

[0024] In some specific embodiments, the fuel level sensor can be a float type level sensor, a hydraulic type level sensor, a resistive level sensor or a capacitive level sensor.

[0025] In this embodiment, the control and feedback device 3 further includes a pressure protection device, and the pressure protection device is a second-stage overflow valve. When the system pressure becomes too high due to overfilling of the fuel tank, the excess fuel can be discharged through the second-stage overflow valve to ensure the safety of the system.

[0026] In this embodiment, the fuel cut-off device 4 mainly includes a hydraulic valve. When the fuel tank liquid level or pressure does not reach the system-set value, the fuel enters the interior of the fuel tank through the hydraulic valve; when the fuel tank liquid level or pressure reaches the system-set value, the hydraulic valve receives the signal from the feedback line and cuts off the fuel inlet, and at the same time sends an alarm signal to the alarm at the fuel filling device 2. The alarm is communicatively connected to the fuel cut-off device 4, and the alarm is a warning light or a voice alarm; when the fuel cut-off device cuts off the fuel inlet, an alarm signal can be sent in the form of sound, light or vibration at the fuel filling gun to prompt the operator that the fuel filling has been automatically cut off.

[0027] In this embodiment, the fuel filling device 2 includes a fixed frame 21 and a fuel filling port 22. The fixed frame 21 fixes the fuel filling port 22 at a position outside the mobile crane that is convenient for the operator to reach and fill fuel, and is connected to the hydraulic valve through a fuel pipeline 6; in some specific embodiments, the interface form of the fuel filling port 22 includes but is not limited to quick-connect type, threaded type and clamp type, etc.; fuel filling can adopt the form of pressure filling or gravity filling; by adopting the method of pressure oil supply, the fuel flow rate can be actively controlled to improve the fuel filling efficiency.

[0028] Embodiment 3 This embodiment provides a mobile crane, and the mobile crane is configured with the fuel filling system described in Embodiment 1 or Embodiment 2.

[0029] The embodiments of the present invention have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those of ordinary skill in the art without departing from the scope and technical principle of the described embodiments, and these modifications and changes should also be regarded as the protection scope of the present invention.

Claims

1. A fuel filling system, characterized in that: It includes fuel tank assembly, refueling device, control and feedback device and fuel cut-off device; The refueling device is connected to the fuel cut-off device through a fuel pipeline, and the fuel cut-off device is connected to the inside of the fuel tank assembly; the control and feedback device is installed on the fuel tank assembly and connected to the fuel cut-off device through a feedback line; The control and feedback device is used to detect the fuel injection amount index and send a feedback signal to the fuel cut-off device when it exceeds a set threshold; the fuel cut-off device is used to receive the feedback signal and cut off the fuel inlet.

2. The fuel filling system according to claim 1, characterized in that: The refueling device comprises a fixed frame and a refueling port, wherein the fixed frame fixes the refueling port to the outside of the vehicle, and the refueling port is connected to a fuel cut-off device through a fuel pipeline.

3. The fuel filling system according to claim 2, characterized in that: The interface form of the refueling port is quick-insert type, threaded type or clamp type.

4. The fuel filling system according to claim 1, characterized in that: It also includes an alarm, which is arranged on the refueling device and is in communication connection with the fuel cut-off device. When the fuel cut-off device cuts off the fuel inlet, an alarm signal is sent out.

5. The fuel filling system according to claim 4, characterized in that: The alarm is a warning light or a voice alarm.

6. The fuel filling system according to claim 1, characterized in that: The fuel cut-off device comprises a hydraulic valve, and the hydraulic valve cuts off the fuel inlet when receiving a feedback signal.

7. The fuel filling system according to claim 1, characterized in that: The control and feedback device includes an oil filling amount indicator sensor. The oil filling amount indicator is the liquid level or pressure in the fuel tank assembly. The corresponding oil filling amount indicator sensor is a fuel level sensor or a pressure sensor.

8. The fuel filling system according to claim 7, characterized in that: The fuel level sensor includes any one of a float level sensor, a hydraulic level sensor, a resistance level sensor or a capacitive level sensor.

9. The fuel filling system according to claim 7, characterized in that: The control and feedback device also includes a pressure protection device. When the fuel tank is overfilled with fuel, resulting in excessive system pressure, the excess fuel is discharged through the pressure protection device.

10. A mobile crane, characterized in that: The mobile crane is equipped with the fuel filling system according to any one of claims 1 to 9.

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