A fuel heating filter suitable for use in low temperature environments

Abstract

The utility model relates to fuel filter equipment technical field, and disclose a kind of fuel heating filter suitable for low temperature environment, including shell, the upper surface of shell is equipped with top cover, the inner bottom wall of shell is fixed with first slot and second slot, the inner wall of first slot is inserted with filter core, the inner wall of second slot is inserted with inner filter screen, the outside of filter core is sleeved with outer filter screen, the outside of shell is provided with heating assembly. The fuel heating filter suitable for low temperature environment, by the first heating pipe outside shell and the second heating pipe in the groove of top cover, the inside and outside collaborative heating, collocation outer sheath inner insulation cotton reduces heat loss, avoid the problem of local overheating and far-end wax precipitation of traditional point heating, ensure low temperature fuel fluidity, the double filtration of outer filter screen and filter core improves fuel cleanliness, temperature sensor temperature control, pressure sensor alarm, low temperature start heating, blockage remind maintenance, avoid oil supply failure.

Description

Technical Field

[0001] This utility model relates to the technical field of fuel filtration equipment, specifically a fuel heating filter suitable for low-temperature environments. Background Technology

[0002] In frigid regions, fuels such as diesel and kerosene are prone to paraffin crystallization due to low temperatures, resulting in a sharp drop in fuel fluidity and a significant increase in viscosity. This can lead to poor fuel supply to diesel vehicles, construction machinery, and other equipment, and in severe cases, cause equipment to stall, directly affecting operational efficiency and safety. As the core pretreatment component of the fuel system, the fuel filter's performance in filtering impurities and ensuring fuel supply directly determines the system's stability.

[0003] An existing patent (publication number: CN212027955U) discloses a fuel filter for an automotive engine, including an inlet pipe, a mounting ring, a first module, a second module, and an outlet pipe. The inlet pipe, the first module, the second module, and the outlet pipe are all cylindrical structures. The inlet pipe is located above the first module, the first module is located above the second module, and the outlet pipe is located below the second module. The mounting ring is installed on the upper surface of the first module, and a valve is provided on the periphery of the outlet pipe to control the opening and closing of the pipe.

[0004] The aforementioned patent removes water from the oil by setting a dehydration ring during use, reduces oil viscosity by setting a heater and a heat transfer layer to prevent it from adhering to the tank wall, and uses a rotating motor and magnetic rod to evenly adsorb iron filings in the oil, improving oil cleanliness and preventing low oil utilization and oil pipe blockage. However, it relies on a heater for point heating during use. Even with a heat transfer layer, the heating area is only near the heater output end, resulting in uneven heat distribution. This can easily cause localized overheating of the fuel, leading to the volatilization of light components, while wax still precipitates in areas far from the heating point, failing to completely solve the blockage problem. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a fuel heating filter suitable for low-temperature environments, which has the advantages of efficient and uniform heating, thus solving the problems mentioned in the background section.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a fuel heating filter suitable for low-temperature environments, comprising a housing, a top cover mounted on the upper surface of the housing, a first slot and a second slot fixed on the inner bottom wall of the housing, a filter element inserted into the inner wall of the first slot, an inner filter screen inserted into the inner wall of the second slot, an outer filter screen sleeved on the outer side of the filter element, a heating assembly disposed on the outer side of the housing, the heating assembly comprising a first heating tube sleeved on the outer surface of the housing, a groove disposed on the upper surface of the top cover, a second heating tube disposed inside the groove, and both the first heating tube and the second heating tube being connected to an external heating device.

[0007] Furthermore, an oil inlet pipe is fixedly connected to the side of the outer casing, and an oil outlet pipe is fixedly connected to the bottom of the outer casing. The connection point between the oil outlet pipe and the outer casing is located inside the inner filter screen.

[0008] With the above scheme, after the fuel enters the housing through the inlet pipe, it first undergoes preliminary filtration through the external filter screen to intercept larger particulate impurities. Then it passes through the filter element, which can deeply filter the fine impurities in the fuel, improving the fuel cleanliness. The first heating tube on the outside of the housing can evenly heat the fuel throughout the housing, avoiding local overheating. The groove on the top surface of the top cover extends into the interior of the housing, and the second heating tube heats the fuel in the middle area of ​​the housing, further improving heating efficiency and ensuring that the fuel maintains good fluidity in low-temperature environments, effectively preventing blockage problems caused by wax precipitation.

[0009] Furthermore, a temperature sensor and a pressure sensor are installed on the inner wall of the housing. The temperature sensor is located inside the inner filter screen, and the pressure sensor is located between the housing and the outer filter screen.

[0010] Through the above scheme, the temperature sensor can monitor the fuel temperature entering the inner filter screen after being filtered by the filter element in real time. When the temperature is lower than the set threshold, it can promptly send a signal to the external heating device to control the first and second heating tubes to start heating, ensuring that the fuel temperature is maintained within a suitable range. The pressure sensor is used to monitor the fuel pressure between the outer shell and the outer filter screen. When the fuel inlet pressure rises abnormally due to impurities clogging the outer filter screen or filter element, it can promptly issue an alarm to remind the operator to replace the filter element or perform equipment maintenance, so as to avoid affecting the normal operation of the equipment due to insufficient fuel supply pressure.

[0011] Furthermore, the filter element is located between the inner filter screen and the outer filter screen, and the filter openings of the inner filter screen and the outer filter screen are of the same size.

[0012] With the above solution, the fuel located on the outer filter screen is filtered by the outer filter screen and the filter element, then passes through the inner filter screen to reach the interior of the inner filter screen, and leaves through the fuel outlet pipe. The inner filter screen supports the filter element, preventing the filter element from deforming due to excessive local pressure.

[0013] Furthermore, a rubber sealing ring is installed on the inner bottom wall of the top cover. The bottom surface of the rubber sealing ring is designed to be concave, and the size of the concavity corresponds to the size of the filter element.

[0014] With the above solution, when the top cover is placed on the outer shell, the concave part of the rubber sealing ring can fit tightly with the top of the filter element, forming a good sealing structure. This effectively prevents unfiltered fuel from leaking through the gap between the top of the filter element and the top cover, ensuring that the fuel must completely pass through the filtration path of the filter element and filter screen, thereby guaranteeing the filtration effect. The rubber material has a certain degree of elasticity, which can play a buffering role when the top cover is installed, avoiding wear caused by hard contact between the top cover and the outer shell. Furthermore, as the usage time increases, the elasticity of the rubber sealing ring can compensate for minor gap changes caused by factors such as equipment vibration, maintaining long-term stable sealing performance.

[0015] Furthermore, an outer sheath is fixed to the outer surface of the outer casing, the first heating tube is located inside the outer sheath, both ends of the first heating tube penetrate the outer sheath, a protective cover is installed at the groove position of the top cover, and both ends of the second heating tube penetrate the protective cover.

[0016] Through the above solution, the outer sheath can protect the first heating tube, preventing it from being damaged by external collisions or friction, while reducing heat loss to the external environment, improving heating efficiency, and reducing energy consumption; the protective cover can prevent dust, moisture and other impurities from entering the groove and affecting the normal operation of the second heating tube, thus extending its service life.

[0017] Furthermore, the inner wall of the outer sheath is lined with insulating cotton.

[0018] The above solution uses flame-retardant materials to make the insulation cotton, which can further reduce heat loss, improve the thermal efficiency of the heating components, and enhance the safety of equipment use, avoiding burns caused by excessively high surface temperature of the outer sheath.

[0019] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:

[0020] This fuel heating filter, suitable for low-temperature environments, uses a first heating tube outside the housing and a second heating tube inside the groove of the top cover for coordinated heating. Combined with the insulation cotton inside the outer sheath, it reduces heat loss and avoids the problems of local overheating and remote wax precipitation that occur with traditional point heating. It ensures the fluidity of fuel at low temperatures. The dual filtration of the outer filter screen and filter element improves fuel cleanliness. Temperature sensor controls temperature, pressure sensor alarms, low-temperature start heating, and blockage reminder maintenance prevent fuel supply failures. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present application;

[0022] Figure 2 This is a partial sectional view of the interior of this application.

[0023] Figure 3 This is a sectional view of the side view of the overall outer sheath of this application;

[0024] Figure 4 This is a sectional view of the overall shell of this application from top view.

[0025] In the picture:

[0026] 1. Outer shell; 2. Top cover; 3. First slot; 4. Second slot; 5. Filter element; 6. Inner filter screen; 7. Outer filter screen;

[0027] 8. Heating assembly; 801. First heating element; 802. Second heating element;

[0028] 9. Oil inlet pipe; 10. Oil outlet pipe; 11. Temperature sensor; 12. Pressure sensor; 13. Rubber sealing ring; 14. Outer sheath; 15. Protective cover; 16. Insulation cotton. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] Please see Figure 1 , Figure 2 and Figure 3 This embodiment of a fuel heating filter suitable for low-temperature environments includes a housing 1, a top cover 2 mounted on the upper surface of the housing 1, a first slot 3 and a second slot 4 fixed on the inner bottom wall of the housing 1, a filter element 5 inserted into the inner wall of the first slot 3, an inner filter screen 6 inserted into the inner wall of the second slot 4, an outer filter screen 7 sleeved on the outer side of the filter element 5, a heating assembly 8 disposed on the outer side of the housing 1, the heating assembly 8 including a first heating tube 801 sleeved on the outer surface of the housing 1, a groove disposed on the upper surface of the top cover 2, a second heating tube 802 disposed inside the groove, and both the first heating tube 801 and the second heating tube 802 being connected to an external heating device.

[0031] Please see Figure 2 , Figure 3 and Figure 4An inlet pipe 9 is fixedly connected to the side of the outer casing 1, and an outlet pipe 10 is fixedly connected to the bottom of the outer casing 1. The connection point between the outlet pipe 10 and the outer casing 1 is located inside the inner filter screen 6. After the fuel enters the outer casing 1 through the inlet pipe 9, it first undergoes preliminary filtration through the outer filter screen 7 to intercept larger particulate impurities. Subsequently, it passes through the filter element 5, which can deeply filter the fine impurities in the fuel, improving fuel cleanliness. The first heating pipe 801 on the outer side of the outer casing 1 can uniformly heat the fuel throughout the entire outer casing 1, avoiding local overheating. The groove on the upper surface of the top cover 2 extends into the interior of the outer casing 1, and the second heating pipe 802 heats the fuel in the middle area of ​​the outer casing 1, further improving heating efficiency and ensuring that the fuel maintains good fluidity in low-temperature environments, effectively preventing blockage problems caused by wax precipitation. A temperature sensor 11 and a pressure sensor 12 are installed on the inner wall of the housing 1. The temperature sensor 11 is located inside the inner filter screen 6, and the pressure sensor 12 is located between the housing 1 and the outer filter screen 7. The temperature sensor 11 can monitor the fuel temperature entering the inner filter screen 6 after being filtered by the filter element 5 in real time. When the temperature is lower than the set threshold, it can promptly send a signal to the external heating device to control the first heating tube 801 and the second heating tube 802 to start heating, ensuring that the fuel temperature is maintained within a suitable range. The pressure sensor 12 is used to monitor the fuel pressure between the housing 1 and the outer filter screen 7. When the oil inlet pressure of the outer filter screen 7 or the filter element 5 is abnormally high due to impurities, it can promptly issue an alarm to remind the operator to replace the filter element 5 or perform equipment maintenance, so as to avoid the normal operation of the equipment due to insufficient oil supply pressure.

[0032] Please see Figure 2 , Figure 3 and Figure 4 The filter element 5 is located between the inner filter screen 6 and the outer filter screen 7. The filter openings of the inner filter screen 6 and the outer filter screen 7 are of the same size. The fuel located on the outer filter screen 7 is filtered by the outer filter screen 7 and the filter element 5, and then passes through the inner filter screen 6 to reach the interior of the inner filter screen 6, and leaves through the fuel outlet pipe 10. The inner filter screen 6 supports the filter element 5 to prevent the filter element 5 from deforming due to excessive local pressure. A rubber sealing ring 13 is installed on the inner bottom wall of the top cover 2. The bottom surface of the rubber sealing ring 13 is designed to be concave, and the size of the concavity corresponds to the size of the filter element 5. When the top cover 2 is closed on the outer shell 1, the rubber sealing ring 13... The concave part can fit tightly with the top of the filter element 5 to form a good sealing structure, effectively preventing unfiltered fuel from leaking from the gap between the top of the filter element 5 and the top cover 2, ensuring that the fuel must completely pass through the filtration path of the filter element 5 and the filter screen, thereby ensuring the filtration effect. The rubber material has a certain elasticity, which can play a buffering role when the top cover 2 is installed, avoiding wear caused by hard contact between the top cover 2 and the outer shell 1. Furthermore, as the usage time increases, the elasticity of the rubber sealing ring 13 can compensate for the slight gap changes caused by factors such as equipment vibration, maintaining long-term stable sealing performance.

[0033] Please see Figure 2 , Figure 3 and Figure 4 An outer sheath 14 is fixed to the outer surface of the outer casing 1. The first heating tube 801 is located inside the outer sheath 14, with both ends of the first heating tube 801 penetrating through the outer sheath 14. A protective cover 15 is installed at the groove position of the top cover 2. Both ends of the second heating tube 802 penetrate through the protective cover 15. The outer sheath 14 can protect the first heating tube 801, preventing damage from external collisions or friction, while reducing heat loss to the external environment, improving heating efficiency, and reducing energy consumption. The protective cover 15 can prevent dust, moisture, and other impurities from entering the groove and affecting the normal operation of the second heating tube 802, extending its service life. The inner wall of the outer sheath 14 is pasted with heat insulation cotton 16, which is made of flame-retardant material. This can further reduce heat loss, improve the thermal efficiency of the heating component 8, and enhance the safety of equipment use, preventing burns caused by excessive surface temperature of the outer sheath 14.

[0034] It should be noted that the threshold values ​​of temperature sensor 11 and pressure sensor 12 should be preset before use.

[0035] The working principle of the above embodiment is as follows: Under the action of the equipment's fuel supply pressure, the low-temperature fuel enters the filter through the fuel inlet pipe 9 on the side of the outer shell 1. It first contacts the outer filter screen 7 sleeved on the outside of the filter element 5. The outer filter screen 7 intercepts larger impurities in the fuel, completing the initial filtration and preventing large particles of impurities from directly adhering to the surface of the filter element 5 and causing blockage. At this time, the pressure sensor 12 between the outer shell 1 and the outer filter screen 7 monitors the fuel pressure in the area in real time, providing data support for blockage warning.

[0036] After initial filtration, the fuel enters the area between the outer filter screen 7 and the filter element 5. The heating component 8 is activated to achieve uniform heating. The first heating tube 801, which is sleeved on the outer surface of the outer shell 1, is energized and heats up. The heat is conducted to the fuel inside through the wall of the outer shell 1. At the same time, the insulation cotton 16 on the inner wall of the outer sheath 14 reduces heat loss to the outside, ensuring that the heat is concentrated on the fuel and avoiding energy waste. The second heating tube 802 in the groove of the top cover 2 is energized simultaneously to directly heat the fuel in the middle area of ​​the outer shell 1. This forms a synergistic heating mode of outer wrapping and internal direct heating with the first heating tube 801, solving the problems of local overheating and wax residue at distant points caused by traditional point heating. The temperature sensor 11 inside the inner filter screen 6 collects the temperature of the filtered fuel in real time. When the temperature is lower than the preset threshold, the sensor feeds back a signal to the external heating device. When the temperature rises to a suitable range, the heating device automatically cuts off the power to prevent local overheating of the fuel from causing the volatilization of light components and to ensure fuel quality and fluidity.

[0037] If the flow cross-section of the outer filter screen 7 or filter element 5 is reduced due to the accumulation of impurities, the pressure between the outer shell 1 and the outer filter screen 7 will rise abnormally. When the pressure sensor 12 detects that the pressure difference is greater than the preset value, it will automatically trigger an alarm to remind the operator to replace the filter element 5 or clean the outer filter screen 7, so as to avoid insufficient oil supply pressure causing the equipment to shut down. The fuel that has been heated and filtered twice will converge to the inside of the inner filter screen 6 and finally be output through the oil outlet pipe 10 on the bottom of the outer shell 1 to provide qualified fuel for the fuel system of diesel vehicles, construction machinery and other equipment, and ensure that the equipment operates stably in low temperature environments.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0039] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fuel heating filter suitable for low-temperature environments, comprising a housing (1), characterized in that: The upper surface of the outer shell (1) is fitted with a top cover (2). The inner bottom wall of the outer shell (1) is fixed with a first slot (3) and a second slot (4). A filter element (5) is inserted into the inner wall of the first slot (3). An inner filter screen (6) is inserted into the inner wall of the second slot (4). An outer filter screen (7) is fitted onto the outer side of the filter element (5). A heating assembly (8) is provided on the outer side of the outer shell (1). The heating assembly (8) includes a first heating tube (801) fitted onto the outer surface of the outer shell (1). The upper surface of the top cover (2) is provided with a groove. A second heating tube (802) is provided inside the groove. Both the first heating tube (801) and the second heating tube (802) are connected to an external heating device.

2. The fuel heating filter suitable for low-temperature environments according to claim 1, characterized in that: An oil inlet pipe (9) is fixedly connected to the side of the outer shell (1), and an oil outlet pipe (10) is fixedly connected to the bottom surface of the outer shell (1). The connection position between the oil outlet pipe (10) and the outer shell (1) is located inside the inner filter screen (6).

3. A fuel heating filter suitable for low-temperature environments according to claim 1, characterized in that: A temperature sensor (11) and a pressure sensor (12) are installed on the inner wall of the outer casing (1). The temperature sensor (11) is located inside the inner filter (6), and the pressure sensor (12) is located between the outer casing (1) and the outer filter (7).

4. A fuel heating filter suitable for low-temperature environments according to claim 1, characterized in that: The filter element (5) is located between the inner filter screen (6) and the outer filter screen (7), and the filter openings of the inner filter screen (6) and the outer filter screen (7) are of the same size.

5. A fuel heating filter suitable for low-temperature environments according to claim 1, characterized in that: A rubber sealing ring (13) is installed on the inner bottom wall of the top cover (2). The bottom surface of the rubber sealing ring (13) is designed to be concave, and the size of the concave part corresponds to the size of the filter element (5).

6. A fuel heating filter suitable for low-temperature environments according to claim 1, characterized in that: An outer sheath (14) is fixed to the outer surface of the outer shell (1). The first heating tube (801) is located inside the outer sheath (14). Both ends of the first heating tube (801) penetrate the outer sheath (14). A protective cover (15) is installed at the groove position of the top cover (2). Both ends of the second heating tube (802) penetrate the protective cover (15).

7. A fuel heating filter suitable for low-temperature environments according to claim 6, characterized in that: The inner wall of the outer sheath (14) is covered with insulating cotton (16).

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