Low-temperature fuel tank
By introducing heat exchange tubes, insulation layers, and a circulating heat pipe system into the fuel tank, the problem of increased fuel viscosity in extremely cold environments was solved, achieving stable operation and efficient heating of the fuel tank, improving the engine start-up success rate, and saving energy and time.
Patent Information
- Application Number
- CN202520221397.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-12
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2035-02-12
AI Technical Summary
In extremely cold environments, the increased viscosity of fuel leads to poor flowability, making it difficult to start the engine. Existing technologies, such as using fuel with a lower pour point or a dual fuel tank system, suffer from poor economic efficiency and energy waste.
A low-temperature fuel tank is designed, which adopts a heat exchange tube, a heat insulation layer and a circulating heat pipe system. Heat exchange is carried out through water circulation. Combined with the heat insulation layer with a hollow honeycomb structure, the fuel tank can achieve automatic temperature regulation and heat preservation.
It effectively prevents fuel from solidifying, improves engine start-up success rate, saves energy and time, and enhances the heat insulation performance and heat exchange efficiency of the fuel tank.
Smart Images
Figure CN223661983U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of engineering machinery fuel tank, concretely relates to a low temperature fuel tank. BACKGROUND
[0002] Compared with the conventional application scene, the extreme application scene puts forward new and more challenging requirements to the engineering machinery, such as the extremely hot area, the problem of the engine working temperature being too high needs to be considered due to the excessively high temperature, the air is thin in the plateau zone, the engine intake volume is small, and the like. And in the extremely cold area, the fuel will become more viscous due to the excessively low temperature, the flowability will be reduced, and some will even be partially solidified, and the fuel with excessively poor flowability will obviously affect the engine starting, causing starting difficulty.
[0003] Under normal circumstances, in order to cope with the low-temperature extremely cold working condition and prevent starting difficulty after the engine is extinguished, the engineering machinery manufacturer will require the user to add fuel with a lower freezing point, and in some more extreme cases, the manufacturer will simply suggest the user not to extinguish the engine after the work is completed. In addition, some designers will adopt a main and auxiliary fuel tank, use low-grade fuel first, and then use high-grade fuel after the engine is preheated, and some designers will increase a liquid fuel heater to burn fuel and preheat the cooling water of the small circulation of the engine, thereby improving the starting success rate.
[0004] This method of adding fuel with a lower freezing point is obviously not economical enough because the fuel with a lower freezing point is much more expensive, and the engine will be extinguished, which will cause great waste of energy and reduce the engine life. The method of adopting a main and auxiliary fuel tank still needs to rely on low-grade fuel, and the economic benefit is poor. The method of increasing a liquid fuel heater can improve the starting success rate, but whether the engine is extinguished for two or three hours or more than eight hours, the fuel will be rapidly cooled to the ambient temperature, so the fuel needs to be burned to heat the engine system, the economic benefit is poor, there is an open flame, and the safety is poor. UTILITY MODEL CONTENTS
[0005] In view of the problem that the fuel will become more viscous and the flowability will be reduced when the temperature is excessively low in the prior art, causing starting difficulty, a low-temperature fuel tank is provided. The utility model provides the following technical scheme:
[0006] A low-temperature fuel tank, comprising a tank body, the tank body comprising a protective layer and an inner wall layer, a first cavity being arranged between the protective layer and the inner wall layer, a heat exchange pipe being arranged in the first cavity, a water inlet, a water outlet and a fuel inlet being arranged on the tank body, and the two ends of the heat exchange pipe being connected to the water inlet and the water outlet respectively.
[0007] Preferably, a second cavity is further arranged between the protective layer and the inner wall layer, and a heat insulation layer is arranged in the second cavity.
[0008] Preferably, the heat insulation layer is arranged between the heat exchange pipe and the protective layer.
[0009] Preferably, the heat insulation layer adopts a hollow honeycomb structure.
[0010] Preferably, the system further comprises a circulating heat pipe, a heater and a water pump, two ends of the circulating heat pipe are connected to the water inlet and the water outlet respectively, and the heater and the water pump are arranged on the circulating heat pipe.
[0011] Preferably, a three-way valve is arranged on the circulating heat pipe, and a cooling pipe is connected in parallel to the three-way valve, and a radiator is arranged on the cooling pipe.
[0012] Preferably, the heat exchange pipe is arranged in a single-layer spiral layer.
[0013] Preferably, the heat exchange pipe is arranged in a square spiral.
[0014] Compared with the prior art, the utility model has the following beneficial effects:
[0015] 1. The heat exchange layer can effectively utilize water circulation for heat exchange, maintain stable operation of the fuel tank in a low-temperature environment, prevent the fuel from solidifying due to excessively low temperature, and improve the ignition success rate.
[0016] 2. The heat insulation layer adopts a hollow honeycomb structure, has excellent heat insulation performance and lightweight characteristics, can further improve the heat preservation effect and overall performance of the fuel tank, reduce the fuel heat loss speed, save the fuel preheating time, and reduce the energy and time waste.
[0017] 3. The arrangement of the circulating heat pipe, the heater and the water pump can realize automatic control and temperature regulation of water circulation, improve the heat exchange efficiency and stability, and make the heat exchange system more intelligent and efficient. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 is a schematic view of a three-dimensional structure of a tank body of the utility model;
[0019] Figure 2 is a system structure diagram of the utility model;
[0020] Figure 3 is Figure 1 is a local enlarged view of A in the middle;
[0021] Figure 4 is a schematic view of a three-dimensional structure of a heat exchange pipe;
[0022] In the attached diagram, 1 is the protective layer; 2 is the inner wall layer; 3 is the first cavity; 4 is the second cavity; 5 is the oil filler port; 6 is the heat exchange tube; 7 is the insulation layer; 8 is the circulating heat pipe; 9 is the heater; 10 is the water pump; 11 is the three-way valve; 12 is the cooling pipe; and 13 is the radiator. Detailed Implementation
[0023] The directional terms mentioned in the following embodiments, such as "up", "down", "left", and "right", are only for reference to the accompanying drawings. Therefore, the directional terms used are for illustration and not for limiting the invention of this utility model.
[0024] like Figures 1-4 As shown, a low-temperature fuel tank includes a tank body, which includes a protective layer 1 and an inner wall layer 2. The inner wall layer 2 is located on the innermost side, and the space enclosed by it is used to store fuel. A first cavity 3 is provided between the protective layer 1 and the inner wall layer 2. A heat exchange tube 6 is provided in the first cavity 3. The tank body is provided with a water inlet, a water outlet, and a fuel filler port 5. The two ends of the heat exchange tube 6 are respectively connected to the water inlet and the water outlet, which can effectively utilize water circulation for heat exchange, maintain the stable operation of the fuel tank in a low-temperature environment, prevent the fuel from solidifying due to excessively low temperature, and improve the ignition success rate.
[0025] Furthermore, a second cavity 4 is provided between the protective layer 1 and the inner wall layer 2. A heat insulation layer 7 is provided in the second cavity 4. The heat insulation layer 7 is arranged between the heat exchange tube 6 and the protective layer 1 and can be separated by a thin plate. The heat insulation layer 7 further improves the heat preservation performance of the fuel tank, reduces heat loss, and improves energy utilization efficiency.
[0026] Furthermore, the heat insulation layer 7 adopts a hollow honeycomb structure and is multi-layered and parallel to the inner wall layer 2, which has excellent heat insulation performance and lightweight characteristics, and can further improve the heat preservation effect and overall performance of the fuel tank. The protective layer 1 is a solid structure, the main purpose of which is to ensure the strength of the fuel tank and prevent the fuel tank from deforming due to impact; the inner wall layer 2 is a smooth inner wall structure, the main function of which is to store fuel.
[0027] Furthermore, it also includes a circulating heat pipe 8, a heater 9, and a water pump 10. The two ends of the circulating heat pipe 8 are connected to the water inlet and the water outlet, respectively. The heater 9 and the water pump 10 are installed on the circulating heat pipe 8, which can realize automatic control of water circulation and temperature regulation, and improve the efficiency and stability of heat exchange.
[0028] Furthermore, a three-way valve 11 is provided on the circulating heat pipe 8, and a cooling pipe 12 is connected in parallel through the three-way valve 11. A radiator 13 is installed on the cooling pipe 12, which can realize dual control of the heat exchange system, which can both heat and cool, to meet the needs of different working environments.
[0029] Further, the heat exchange pipe 6 is arranged in a single-layer square spiral layer, which can increase the heat exchange area, improve the heat exchange efficiency, maintain the compactness of the structure, adapt to the internal space of the box body, and improve the space utilization.
[0030] Meanwhile, the air cap is arranged on the oil tank to balance the air pressure inside and outside the oil tank.
[0031] The heat exchange layer is combined with the honeycomb heat insulation layer 7, so that the ignition success rate is improved, the fuel heat loss speed is reduced, and the problem of difficult starting of the engineering vehicle under the extremely low temperature working condition can be solved.
[0032] When the cold start is performed for the first time after the long-time ignition-off, the heat exchange layer performs the non-contact heating on the fuel in the fuel tank body, the heating speed is fast, and the heating is safe and reliable.
[0033] When the cold start is performed again after the medium-time ignition-off, the heat insulation layer 7 in the honeycomb structure can play a good heat preservation role, reduce the fuel heat loss speed, avoid the situation that the external heat source needs to be introduced for heating due to the too fast fuel heat dissipation, greatly save the fuel preheating time, and reduce the energy and time waste.
[0034] When the fuel temperature is too high, the heat exchange liquid can flow into the radiator 13, so as to take away the heat inside the tank body, reduce the fuel temperature, and avoid the situation that the fuel temperature is too high due to the too good heat preservation effect.
Claims
1. A cryogenic fuel tank characterized by, The application relates to a heat exchange tank, which comprises a box body, a protective layer (1) and an inner wall layer (2), a first cavity (3) is arranged between the protective layer (1) and the inner wall layer (2), a heat exchange pipe (6) is arranged in the first cavity (3), a water inlet, a water outlet and an oil inlet (5) are arranged on the box body, and the two ends of the heat exchange pipe (6) are connected to the water inlet and the water outlet respectively.
2. The cryogenic fuel tank of claim 1, wherein, A second cavity (4) is further arranged between the protective layer (1) and the inner wall layer (2), and a heat insulation layer (7) is arranged in the second cavity (4).
3. The cryogenic fuel tank of claim 2, wherein, The heat insulation layer (7) is arranged between the heat exchange pipe (6) and the protective layer (1).
4. The cryogenic fuel tank of claim 2, wherein, The heat insulation layer (7) adopts a hollow honeycomb structure.
5. The cryogenic fuel tank of claim 1, wherein, A circulating heat pipe (8), a heater (9) and a water pump (10) are further arranged, the two ends of the circulating heat pipe (8) are connected to the water inlet and the water outlet respectively, and the heater (9) and the water pump (10) are arranged on the circulating heat pipe (8).
6. The cryogenic fuel tank of claim 5, wherein, A three-way valve (11) is arranged on the circulating heat pipe (8), a cooling pipe (12) is connected in parallel through the three-way valve (11), and a radiator (13) is arranged on the cooling pipe (12).
7. The cryogenic fuel tank of claim 1, wherein, The heat exchange pipe (6) is arranged in a single-layer spiral layer.
8. The cryogenic fuel tank of claim 7, wherein, The heat exchange pipe (6) is arranged in a square spiral.