A multi-tank full fuel signaler and fuel level monitoring method

Abstract

The present invention discloses a multi-tank full oil level signaler, which includes a fuel tank and an oil level signaler. An oil level signaler working point is provided inside the oil level signaler. The fuel tank includes a first fuel tank and a second fuel tank. A full oil level line one is provided inside the first fuel tank, and a full oil level line two is provided inside the second fuel tank. The full oil level line one is higher than the full oil level line two. A signaler assembly is connected between the first fuel tank and the second fuel tank. The signaler assembly includes a housing. An oil leakage hole is provided at the bottom of the housing. The housing is arranged on the second fuel tank and the oil leakage hole is located inside the second fuel tank. A fuel filling pipe and a ventilation hole are provided on the side wall of the housing. The other end of the fuel filling pipe is arranged inside the first fuel tank. The oil level signaler is arranged inside the housing. When the present invention is used to monitor two fuel tanks, no matter which fuel tank's oil reaches the full oil level line first, the oil level signaler will not be turned on. Only when the fuel in both fuel tanks reaches the full oil level line, the oil level signaler will be turned on to send a signal, thereby realizing the monitoring of the full oil levels of two independent fuel tanks by one oil level signaler.

Description

Technical Field

[0001] The present invention belongs to the technical field of fuel system refueling control, and particularly relates to a multi-tank full fuel signaler and an oil level monitoring method. Background Art

[0002] An aircraft usually includes multiple fuel tanks. For two independent fuel tanks (without a direct connection relationship), affected by factors such as the remaining fuel volume in the tanks and the refueling flow rate, the order of full fuel in the two tanks is not uniquely determined, and there are various differences in the full fuel time. Therefore, it is impossible to monitor the full fuel situation of two independent tanks using a single oil level signaler. When using a single oil level signaler to monitor and control the refueling of two independent tanks, in different refueling states, it may cause one of the tanks not to reach the full fuel level at the end of refueling, resulting in a large fuel quantity error and unable to achieve precise control of the refueling quantity in different refueling states. If two oil level signalers are used for monitoring, not only the cost is high and the failure rate is high, but also the installation space of some tanks is limited, which is not convenient for the installation of the oil level signaler. Therefore, there is an urgent need to improve the existing oil level signaler to meet the usage requirements. Summary of the Invention

[0003] To solve the above problems, the object of the present invention is to provide a multi-tank full fuel signaler and an oil level monitoring method.

[0004] A multi-tank full fuel signaler includes a fuel tank and an oil level signaler. An oil level signaler working point is provided inside the oil level signaler. The fuel tank includes Fuel Tank One and Fuel Tank Two. Both Fuel Tank One and Fuel Tank Two are provided with a refueling port and a ventilation pipeline. A float valve is provided inside both Fuel Tank One and Fuel Tank Two. The above are conventional settings in the art and will not be elaborated. A full fuel level line One is provided inside Fuel Tank One, and a full fuel level line Two is provided inside Fuel Tank Two. The full fuel level line One is higher than the full fuel level line Two. A signaler assembly is connected between Fuel Tank One and Fuel Tank Two. The signaler assembly includes a housing. An oil leakage hole is provided at the bottom of the housing. The housing is provided on Fuel Tank Two and the bottom of the housing is provided inside Fuel Tank Two, so that the oil leakage hole is located inside Fuel Tank Two. A refueling pipe and a ventilation hole are provided on the side wall of the housing. The ventilation hole is located at the upper end of the housing. A ventilation pipe is connected at the ventilation hole. The other end of the refueling pipe is provided inside Fuel Tank One. The oil level signaler is provided inside the housing.

[0005] For example, to ensure the accuracy of monitoring, the position of the oil leakage hole is lower than the full fuel level line Two; the inlet end face of the refueling pipe is at the same horizontal height as the full fuel level line One; the horizontal height of the oil level signaler working point is lower than the position of the ventilation hole and higher than the outlet end of the refueling pipe; when the oil level in Fuel Tank Two is lower than the full fuel level line Two, the flow capacity of the oil leakage hole is greater than that of the refueling pipe.

[0006] An oil level monitoring method using the above multi-tank full fuel signaler, when refueling Fuel Tank One and Fuel Tank Two simultaneously, the following two situations will occur:

[0007] The first case: When the fuel in fuel tank 1 reaches the full fuel level line 1, while the fuel in fuel tank 2 does not reach the full fuel level line 2, the fuel in fuel tank 1 enters the housing through the fuel filling pipe and flows into fuel tank 2 through the oil leakage hole at the bottom of the housing. Since the flow capacity of the oil leakage hole is greater than that of the fuel filling pipe, the oil level in the housing cannot reach the height of the oil level signal working point, and the oil level signal device cannot be connected.

[0008] When the fuel in fuel tank 2 reaches the full fuel level line 2, the fuel in fuel tank 2 is higher than the bottom of the signal device housing. At this time, the flow capacity of the oil leakage hole at the bottom of the housing is less than that of the fuel filling pipe, and the oil level inside the housing can quickly rise to the height of the oil level signal working point, enabling the oil level signal device to be connected and send a signal.

[0009] The second case: When the fuel in fuel tank 2 reaches the full fuel level line 2, the float valve in fuel tank 2 floats up, blocking the ventilation pipe on fuel tank 2, so that fuel cannot be added to fuel tank 2 anymore. At this time, fuel continues to be added to fuel tank 1. When the fuel in fuel tank 1 reaches the full fuel level line 1, the fuel enters the housing through the fuel filling pipe and quickly rises to the height of the oil level signal working point, enabling the oil level signal device to be connected and send a signal.

[0010] Compared with the prior art, the multi-tank full fuel signal device and the oil level monitoring method of the present invention have the following beneficial effects: 1. When using the multi-tank full fuel signal device of the present invention to monitor two fuel tanks, no matter which fuel tank's oil reaches the full fuel level line first, the oil level signal device will not be connected and send a signal. Only when the fuel in both fuel tanks reaches the full fuel level line, the oil level signal device will be connected and send a signal, thereby realizing the monitoring of the full fuel levels of two independent fuel tanks by one oil level signal device; 2. The structure of the present invention is simple, the operation is reliable, the monitoring accuracy is high, the use is safe, it can effectively reduce costs, reduce failure rates, and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be further described in detail below with reference to the accompanying drawings.

[0012] Figure 1 It is a schematic structural diagram of the multi-tank full fuel signal device of the present invention.

[0013] As shown in the figure, 1 - fuel tank 1, 2 - full fuel level line 1, 3 - fuel filling pipe, 4 - housing, 5 - oil level signal device, 6 - oil level signal device working point, 7 - ventilation pipe, 8 - fuel tank 2, 9 - full fuel level line 2, 10 - oil leakage hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand the other advantages and effects of the present invention from the content disclosed in this specification.

[0015] It should be noted that the structures, ratios, sizes, etc. shown in the attached drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the implementation conditions of the present invention. Therefore, they do not have substantial technical significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "high", "low", etc. cited in this specification are only for the convenience of clear description and are not used to limit the scope of implementation of the present invention. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope of implementation of the present invention.

[0016] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "provided with" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0017] It should be noted that the term "comprising" or any other variant is intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements not only includes those elements but also includes other elements not explicitly listed, or further includes elements inherent to such a process, method, article, or device.

[0018] As Figure 1 shown, a multi-tank full-oil signaler includes a fuel tank and an oil level signaler 5. An oil level signaler working point 6 is provided in the oil level signaler 5. The fuel tank includes a first fuel tank 1 and a second fuel tank 8. A fuel filling port and a ventilation pipeline are provided on both the first fuel tank 1 and the second fuel tank 8. A float valve is provided in both the first fuel tank 1 and the second fuel tank 8. The above are conventional settings in the art and will not be elaborated. A full-oil level line one 2 is provided in the first fuel tank 1, and a full-oil level line two 9 is provided in the second fuel tank 8. The full-oil level line one 2 is higher than the full-oil level line two 9. A signaler assembly is connected between the first fuel tank 1 and the second fuel tank 8. The signaler assembly includes a housing 4. An oil leakage hole 10 is provided at the bottom of the housing 4. The housing 4 is provided on the second fuel tank 8 and the bottom of the housing 4 is provided inside the second fuel tank 8, so that the oil leakage hole 10 is located inside the second fuel tank 8. A fuel filling pipe 3 and a ventilation hole are provided on the side wall of the housing 4. The ventilation hole is located at the upper end of the housing 4. A ventilation pipe 7 is connected at the ventilation hole. The other end of the fuel filling pipe 3 is provided inside the first fuel tank 1. The oil level signaler 5 is provided inside the housing 4.

[0019] For example, to ensure the accuracy of monitoring, the position of the oil leakage hole 10 is lower than the full oil level line II 9; the inlet end face of the fuel filling pipe 3 (i.e., the end face extending into the fuel tank) is at the same horizontal height as the full oil level line I 2; the horizontal height of the operating point 6 of the oil level signal device is lower than the position of the ventilation hole and higher than the outlet end of the fuel filling pipe 3 (i.e., the end located on the housing); when the oil level in the fuel tank II 8 is lower than the full oil level line II 9, the flow capacity of the oil leakage hole 10 is greater than that of the fuel filling pipe 3 (achieved through flow resistance matching).

[0020] An oil level monitoring method using the above-mentioned multi-fuel tank full oil signal device, when simultaneously refueling the fuel tank I and the fuel tank II by the pressure refueling method, the following two situations will occur:

[0021] The first situation: When the fuel in the fuel tank I 1 reaches the full oil level line I 2, while the fuel in the fuel tank II 8 has not reached the full oil level line II 9, the fuel in the fuel tank I 1 enters the housing 4 through the fuel filling pipe 3 and flows into the fuel tank II 8 through the oil leakage hole 10 at the bottom of the housing 4. Since the flow capacity of the oil leakage hole 10 is greater than that of the fuel filling pipe 3 at this time, the oil level in the housing 4 cannot reach the height of the oil level signal operating point 6, and the oil level signal device 5 cannot be connected;

[0022] When the fuel in the fuel tank II 8 reaches the full oil level line II 9, the fuel in the fuel tank II 8 is higher than the bottom of the signal device housing 4. At this time, the flow capacity of the oil leakage hole 10 at the bottom of the housing 4 is less than that of the fuel filling pipe 3, and the oil level inside the housing 4 can quickly rise to the height of the oil level signal operating point 6, enabling the oil level signal device 5 to be connected and emit a signal;

[0023] The second situation: When the fuel in the fuel tank II 8 reaches the full oil level line II 9, while the fuel in the fuel tank I 1 has not reached the full oil level line I 2, the float valve in the fuel tank II 8 floats up, blocking the ventilation pipeline on the fuel tank II 8, so that no more fuel can be added to the fuel tank II 8. At this time, fuel continues to be added to the fuel tank I 1. When the fuel in the fuel tank I 1 reaches the full oil level line I 2, the fuel enters the housing 4 through the fuel filling pipe 3 (at this time, the fuel in the fuel tank II 8 has reached the full oil level line II 9, and the fuel cannot enter the fuel tank II 8 through the oil leakage hole 10), and quickly rises to the height of the oil level signal operating point 6, enabling the oil level signal device 5 to be connected and emit a signal.

[0024] Therefore, when using the multi-fuel tank full oil signal device of the present invention to monitor two fuel tanks, regardless of which fuel tank's oil reaches the full oil level line first, the oil level signal device will not be connected and emit a signal. Only when the fuel in both fuel tanks reaches the full oil level line, the oil level signal device will be connected and emit a signal, thereby realizing the monitoring of the full oil levels of two independent fuel tanks by one oil level signal device.

[0025] Other details not elaborated in the present invention are all well-known conventional technologies in the art.

[0026] The protection scope of the present invention is not limited to the technical solutions disclosed in the specific embodiments. Any modifications, equivalent substitutions, improvements, etc. made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A multi-tank full fuel signaler, comprising a fuel tank and a fuel level signaler, wherein a fuel level signaler working point is provided inside the fuel level signaler, and it is characterized in that: The fuel tank includes a first fuel tank and a second fuel tank. The first fuel tank 1 and the second fuel tank 8 are both provided with a fuel filling port and a ventilation pipeline. A float valve is provided in each of the first fuel tank 1 and the second fuel tank 8. A full fuel level line one is provided in the first fuel tank, and a full fuel level line two is provided in the second fuel tank. The full fuel level line one is higher than the full fuel level line two. A signaler assembly is connected between the first fuel tank and the second fuel tank. The signaler assembly includes a housing. An oil leakage hole is provided at the bottom of the housing. The housing is provided on the second fuel tank and the oil leakage hole is located inside the second fuel tank. A fuel filling pipe and a ventilation hole are provided on the side wall of the housing. The other end of the fuel filling pipe is provided inside the first fuel tank. The oil level signaler is provided inside the housing. The ventilation hole is located at the upper end of the housing, and a ventilation pipe is connected at the ventilation hole. The position of the oil leakage hole is lower than the full fuel level line two. The inlet end face of the fuel filling pipe is at the same horizontal height as the full fuel level line one. The horizontal height of the working point of the oil level signaler is lower than the position of the ventilation hole and higher than the outlet end of the fuel filling pipe. When the oil level in the second fuel tank is lower than the full fuel level line two, the flow capacity of the oil leakage hole is greater than that of the fuel filling pipe.

2. An oil level monitoring method using the multi-tank full oil signaler as described in claim 1, characterized in that: It includes the following steps: (1) Simultaneously filling the first fuel tank and the second fuel tank: When the fuel in the first fuel tank reaches the full fuel level line one while the fuel in the second fuel tank has not reached the full fuel level line two, the fuel in the first fuel tank enters the housing through the fuel filling pipe and flows into the second fuel tank through the oil leakage hole at the bottom of the housing. Since the flow capacity of the oil leakage hole is greater than that of the fuel filling pipe, the oil level in the housing cannot reach the height of the oil level signal working point, and the oil level signaler cannot be turned on. The fuel in the second fuel tank is higher than the bottom of the signaler housing. At this time, the flow capacity of the oil leakage hole at the bottom of the housing is less than that of the fuel filling pipe, and the oil level inside the housing can quickly rise to the height of the oil level signal working point, causing the oil level signaler to be turned on and emit a signal. (2) When the fuel in the second fuel tank reaches the full fuel level line two while the fuel in the first fuel tank has not reached the full fuel level line one, the float valve in the second fuel tank floats up to block the ventilation pipeline on the second fuel tank, so that fuel cannot be added to the second fuel tank anymore. At this time, fuel continues to be added to the first fuel tank. When the fuel in the first fuel tank reaches the full fuel level line one, the fuel enters the housing through the fuel filling pipe and quickly rises to the height of the oil level signal working point, causing the oil level signaler to be turned on and emit a signal.

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