Fuel oil conversion device for diesel engine

Abstract

The utility model discloses a fuel oil conversion device for a diesel engine, which comprises a valve body mounting seat mounted on the upper end face of a supporting plate, an oil suction three-way valve and an oil return three-way valve are mounted in the valve body mounting seat, and a first electric actuator and a second electric actuator are mounted on the upper end face of the valve body mounting seat. A first valve element installed in the oil suction three-way valve is connected with a first electric actuator, a second valve element installed in the oil return three-way valve is connected with a second electric actuator, delayed switching of an oil way of the oil return three-way valve can be controlled, fuel oil in an oil return pipe returns to an oil tank of a corresponding mark, and fuel oil mixing is reduced. The fuel oil conversion device is compact and reasonable in overall structural design, the transverse width size and the total size of the fuel oil conversion device are remarkably reduced, the fuel oil conversion device is installed in a fuel oil conversion device embedding hole in the bottom of a main oil tank in an inverted and embedded mode when used, and the requirement for the installation and use space of the fuel oil conversion device is effectively lowered; the heating assembly is located in the main oil tank and used for heating fuel oil.

Description

Technical Field

[0001] This utility model relates to the technical field of internal combustion engine fuel supply equipment, specifically to a fuel conversion device for a diesel engine. Background Technology

[0002] The lower the octane rating of diesel fuel (e.g., -35#), the less likely it is to solidify at low temperatures, but the higher the price. To reduce the operating costs of diesel vehicles, most vehicles and power equipment typically use relatively high-octane diesel fuel (e.g., 0#) whenever possible, when weather conditions permit. However, winter temperatures in northern my country are very low and fluctuate greatly. Diesel fuel of the same octane rating (e.g., 0# and -10#) may work normally during the day, but will solidify at night or during severe weather or sudden temperature drops, causing blockages in the diesel engine's fuel supply circuit and rendering it unable to operate. To address this problem, various fuel conversion devices for heating diesel engines have emerged on the market. However, most existing diesel engine fuel conversion devices are quite large, often limiting their installation space when mounted on the main fuel tank of a diesel vehicle. Therefore, this invention proposes a fuel conversion device for diesel engines to solve the aforementioned technical problems. Summary of the Invention

[0003] The purpose of this invention is to overcome the defects in the existing technology and provide a fuel conversion device for diesel engines. The electric actuator that drives the valve core, the valve body mounting seat, the support plate, and the heating component are arranged longitudinally in sequence. The suction three-way valve and the return three-way valve are installed inside the valve body mounting seat. The overall structure is compact and reasonable, which significantly reduces the lateral width and overall volume of the fuel conversion device. When in use, the fuel conversion device is inverted and embedded in the fuel conversion device mounting hole at the bottom of the main fuel tank. Its support plate is fixedly installed at the bottom of the main fuel tank. The valve body mounting seat and the electric actuator are located below the bottom of the main fuel tank, and the heating component is located inside the main fuel tank, thereby effectively reducing the space requirements for installation and use of the fuel conversion device.

[0004] To achieve the above objectives, the technical solution of this utility model is to design a fuel conversion device for a diesel engine, including a valve body mounting seat, which is mounted on the upper surface of a support plate. An electric actuator one and an electric actuator two are mounted on the upper surface of the valve body mounting seat. An oil suction three-way valve and a oil return three-way valve are installed inside the valve body mounting seat. The three ports of the oil suction three-way valve are the engine oil inlet, the auxiliary fuel tank oil suction port, and the main fuel tank oil suction port, respectively. The three ports of the oil return three-way valve are the engine oil return port, the auxiliary fuel tank oil return port, and the main fuel tank oil return port, respectively. A valve core is rotatably mounted inside the oil suction three-way valve. 1. The valve core 1 has a valve core channel 1 and a valve core hole communicating with the valve core channel 1. The return oil three-way valve has a valve core 2 rotatably installed inside. The valve core 2 has a valve core channel 2 and a valve core hole communicating with the valve core channel 2. The engine oil inlet, the auxiliary oil tank suction port and the main oil tank suction port form a suction three-way oil circuit through the valve core 1. The engine oil return port, the auxiliary oil tank return port and the main oil tank return port form a return oil three-way oil circuit through the valve core 2. The control end of the valve core 1 is connected to an electric actuator 1. The electric actuator 1 drives the valve core 1 to rotate to control the rotation and switching of the suction three-way oil circuit between the first state and the second state.

[0005] In the first state, the engine oil inlet is connected to the auxiliary oil tank suction port through the valve core channel 1;

[0006] In the second state, the engine oil inlet is connected to the main oil tank suction port through the valve core channel 1;

[0007] The control end of the valve core 2 is connected to the electric actuator 2. The electric actuator 2 drives the valve core 2 to rotate, thereby controlling the rotation switching of the return oil three-way oil circuit between the third and fourth states.

[0008] In the third state, the engine oil return port is connected to the auxiliary oil tank oil return port through the valve core channel two.

[0009] In the fourth state, the engine oil return port is connected to the main oil tank oil return port through the valve core channel two.

[0010] The lower end face of the support plate has a heating component for heating the fuel inside the main fuel tank. The support plate has an oil suction hole and an oil return hole that penetrate the plate body. The oil suction hole is connected to the oil suction port of the main fuel tank, and the oil return hole is connected to the oil return port of the main fuel tank.

[0011] This utility model discloses a fuel conversion device for a diesel engine. An electric actuator for driving the valve core, a valve body mounting base, a support plate, and a heating assembly are arranged longitudinally in sequence. The suction three-way valve and the return three-way valve are installed inside the valve body mounting base. The overall structure is compact and reasonable, significantly reducing the lateral width and overall volume of the fuel conversion device. Furthermore, when in use, the fuel conversion device is inverted and embedded in the fuel conversion device mounting hole at the bottom of the main fuel tank. Its support plate is fixedly installed at the bottom of the main fuel tank, the valve body mounting base and the electric actuator are located below the bottom of the main fuel tank, and the heating assembly is located inside the main fuel tank. This effectively reduces the space requirements for installation and use of the fuel conversion device.

[0012] A preferred technical solution is that the valve body mounting seat includes a base and a cover. The upper surface of the base has a groove 1 located in the horizontal direction and two parallel grooves 2 located in the horizontal longitudinal direction. The lower surface of the cover has a groove 3 located in the horizontal direction and two parallel grooves 4 located in the horizontal longitudinal direction. The base is fixedly installed on the upper surface of the support plate, and the cover is correspondingly fastened to the base. The grooves 1 and 3 are spliced ​​together to form a cavity 1, and the two grooves 2 and 4 are spliced ​​together to form two cavities 2. The suction three-way valve is installed in one cavity 2, and the return three-way valve is installed in the other cavity 2. The cover is also provided with two through holes 1. The control end of the valve core 1 passes through one of the through holes 1 and is connected to the electric actuator 1. The control end of the valve core 2 passes through the other through hole 1 and is connected to the electric actuator 2. The valve body mounting base consists of a base and a pressure cap that are fastened together. The split-type structure design of the valve body mounting base ensures the convenience of installing the suction three-way valve and the return three-way valve inside. Furthermore, the suction three-way valve and the return three-way valve are readily available in the market, ensuring that the fuel conversion device of this utility model can be assembled smoothly and is economical.

[0013] A further preferred technical solution is that the base has a countersunk mounting hole at the bottom of the second groove, the support plate has mounting holes, and the base is fixedly mounted on the upper surface of the support plate by screws passing through the countersunk mounting hole.

[0014] The pressure cap has a cross-section that is a "7"-shaped plate structure with a horizontal section extending forward. The front side of the vertical plate of the pressure cap has a groove five corresponding to groove four. The pressure cap and the base are provided with corresponding mounting holes and are fixed together by screws. The corresponding grooves two, four and five form a cavity two with an axial longitudinal section of a "7"-shaped structure. The main fuel tank suction port and the main fuel tank return port are both located at the vertical section port of the corresponding cavity two. One of the engine fuel inlet and the auxiliary fuel tank suction port is located at the horizontal section port of one corresponding cavity two, and the other of the engine fuel inlet and the auxiliary fuel tank suction port is located at one port of cavity one. One of the engine fuel return port and the auxiliary fuel tank return port is located at the horizontal section port of another corresponding cavity two, and the other of the engine fuel return port and the auxiliary fuel tank return port is located at another port of cavity one. The base is simply fixed on the support plate. The axial longitudinal section of cavity two has a "7" shaped structure. Therefore, when the suction three-way valve and the return three-way valve are installed inside the corresponding cavity one and cavity two inside the valve body mounting seat, the main oil tank suction port and the main oil tank return port are both located at the vertical section port of the corresponding cavity two. This ensures the convenience of connecting the suction three-way valve to the suction hole on the support plate and the return three-way valve to the return hole on the support plate.

[0015] A further preferred technical solution includes that both the engine oil inlet and outlet are equipped with pipe connector one, and both the auxiliary fuel tank suction port and return port are equipped with pipe connector two. Both pipe connector one and pipe connector two face the front side of the valve body mounting seat. The auxiliary fuel tank suction port is located at the horizontal section port of one corresponding cavity two, and the auxiliary fuel tank return port is located at the horizontal section port of another corresponding cavity two. This valve port design is rationally laid out and facilitates the connection between the valve ports and corresponding pipelines on the fuel conversion device.

[0016] A further preferred technical solution includes a sixth and a seventh groove on the top of the pressure cap. A relay is installed inside the sixth groove, and a temperature control board is installed inside the seventh groove. The heating assembly consists of several electric heating elements extending below the support plate. These electric heating elements, the relay, and the temperature control board constitute an electric heating system for heating the fuel inside the main fuel tank. The electric heating system has a clever and reasonable structural design, and the relay, temperature control board, electric actuator one, and electric actuator two are all located on the upper surface of the valve body mounting base, thus not increasing the overall height of the fuel conversion device of this utility model.

[0017] A further preferred technical solution is that a cover is installed on the upper surface of the valve body mounting base, covering the electric actuator one, electric actuator two, relay, and temperature control board. The cover protects the control circuit components of the electric actuators and heating system, thereby ensuring good safety during use of the fuel conversion device of this utility model and helping to extend its overall service life.

[0018] A further preferred technical solution includes a downwardly extending oil suction pipe and an oil return pipe fixedly connected to the support plate. The upper end of the oil suction pipe passes through the oil suction hole on the support plate and is provided with an oil suction pipe connector. The upper end of the oil return pipe passes through the oil return hole on the support plate and is provided with an oil return pipe connector. Both the main oil tank suction port and the main oil tank return port are equipped with a "7"-shaped pipe connector three. The vertical section of the pipe connector three installed on the main oil tank suction port is inserted and fixedly connected to the oil suction pipe connector. The vertical section of the pipe connector three installed on the main oil tank return port is inserted and fixedly connected to the oil return pipe connector. Furthermore, a knob cover is fitted on the outside of the oil suction pipe connector and the corresponding vertical section of the pipe connector three, and on the outside of the oil return pipe connector and the corresponding vertical section of the pipe connector three. The rear side of the base is provided with a notch corresponding to the groove two, and the vertical section of the pipe connector three is embedded in the corresponding notch. The main oil tank suction port on the suction three-way valve is connected to the suction pipe connector at the upper end of the suction pipe via pipe connector three, and the main oil tank return port on the return three-way valve is connected to the return pipe connector at the upper end of the return pipe via pipe connector three. The connection method is simple, ensuring that the fuel conversion device of this utility model can be successfully prepared and implemented.

[0019] A further preferred technical solution includes a filter cartridge. The upper end of the filter cartridge has a skirt extending inwards. The support plate is a flange plate. The support plate and the skirt are provided with several corresponding mounting holes spaced circumferentially. The filter cartridge is fixedly connected together by screws passing through the corresponding mounting holes on the support plate and the skirt. The oil suction pipe, oil return pipe, and electric heating element are all located inside the filter cartridge. The filter cartridge protects the heating components, oil suction pipe, and oil return pipe. Simultaneously, it provides preliminary filtration of fuel entering the oil suction pipe from the main fuel tank, preventing impurities from entering the oil suction pipe and ensuring smooth fuel supply. The filter cartridge is simply fixed to the lower end face of the support plate, ensuring convenient and efficient installation.

[0020] A further preferred technical solution includes several through holes 2 on the outer periphery of the bottom of the filter cylinder, each through hole 2 corresponding to a mounting hole on the skirt; several through holes 3 on the bottom of the filter cylinder, each through hole 3 corresponding to a heating element; and several through holes 4 on the bottom of the filter cylinder for mounting a liquid level sensor. The through holes 2 on the bottom of the filter cylinder improve the ease of fixing the filter cylinder to the support plate, and the through holes 3 improve the ease of fixing the heating elements to the support plate; the through holes 4 allow for the mounting of components such as a liquid level sensor on the lower end face of the support plate.

[0021] A preferred technical solution is that the support plate is provided with a waste discharge through-hole, and a drain pipe connector extending to the upper surface of the support plate is installed inside the waste discharge through-hole. When it is necessary to clean the inside of the main oil tank, the cleaning waste liquid can be discharged through the waste discharge through-hole, and the drain pipe connector improves the convenience of connecting the waste discharge through-hole with the sewage pipe.

[0022] The advantages and beneficial effects of this utility model are as follows:

[0023] 1. This utility model discloses a fuel conversion device for a diesel engine. The electric actuator that drives the valve core, the valve body mounting seat, the support plate, and the heating component are arranged longitudinally in sequence. The suction three-way valve and the return three-way valve are installed inside the valve body mounting seat. The overall structure is compact and reasonable, which significantly reduces the lateral width and overall volume of the fuel conversion device. In use, the fuel conversion device is inverted and embedded in the fuel conversion device mounting hole at the bottom of the main fuel tank. The support plate is fixedly installed at the bottom of the main fuel tank. The valve body mounting seat and the electric actuator are located below the bottom of the main fuel tank, and the heating component is located inside the main fuel tank. This effectively reduces the space requirements for installation and use of the fuel conversion device.

[0024] 2. The valve body mounting seat is composed of a base and a pressure cap that are fastened together. The split-type structure design of the valve body mounting seat ensures the convenience of installing the suction three-way valve and the return three-way valve inside. Furthermore, the suction three-way valve and the return three-way valve are readily available in the market, ensuring that the fuel conversion device of this utility model can be assembled smoothly and is economical.

[0025] 3. The base is simply fixed on the support plate. The axial longitudinal section of cavity two is a "7" shaped structure. Therefore, when the suction three-way valve and the return three-way valve are installed inside the corresponding cavity one and cavity two inside the valve body mounting seat, the main oil tank suction port and the main oil tank return port are both located at the vertical section port of the corresponding cavity two, ensuring the convenience of connecting the suction three-way valve to the suction hole on the support plate and the return three-way valve to the return hole on the support plate.

[0026] 4. The electric heating system has a clever and reasonable structural design, and the relay, temperature control board, electric actuator one and electric actuator two are all located on the upper end face of the valve body mounting base, so as not to increase the overall height of the fuel conversion device of this utility model.

[0027] 5. A cover is installed on the upper surface of the valve body mounting base, which covers the electric actuator one, electric actuator two, relay, and temperature control board. The cover protects the control circuit components of the electric actuators and heating system, thereby ensuring good safety during use of the fuel conversion device of this utility model and helping to extend the overall service life.

[0028] 6. The main oil tank suction port on the suction three-way valve is connected to the suction pipe connector at the upper end of the suction pipe via pipe connector three, and the main oil tank return port on the return three-way valve is connected to the return pipe connector at the upper end of the return pipe via pipe connector three. The connection method is simple, ensuring that the fuel conversion device of this utility model can be successfully prepared and implemented.

[0029] 7. The filter cartridge protects the heating components, suction pipe, and return pipe. It also provides preliminary filtration of fuel from the main tank before it enters the suction pipe, preventing impurities from entering the suction pipe and ensuring smooth fuel supply. The filter cartridge is simply fixed to the lower end of the support plate, ensuring convenient and efficient installation.

[0030] 8. The second through hole at the bottom of the filter cartridge improves the convenience of fixing the filter cartridge on the support plate, and the third through hole improves the convenience of fixing the electric heating element on the support plate; through the fourth through hole, components such as liquid level sensors can be installed on the lower end face of the support plate.

[0031] 9. The support plate is provided with a waste discharge through-hole that penetrates the plate body, and a drain pipe connector extending to the upper surface of the support plate is installed inside the waste discharge through-hole. When it is necessary to clean the inside of the main oil tank, the cleaning waste liquid can be discharged through the waste discharge through-hole. The drain pipe connector improves the convenience of connecting the waste discharge through-hole with the sewage pipe. Attached Figure Description

[0032] Figure 1 This is a perspective view from the left front side of a fuel conversion device for a diesel engine according to the present invention;

[0033] Figure 2 This is an inverted perspective view of a fuel conversion device for a diesel engine according to the present invention;

[0034] Figure 3 This is a left rear-view perspective view of a fuel conversion device for a diesel engine according to the present invention.

[0035] Figure 4This is an exploded view of a fuel conversion device for a diesel engine according to the present invention;

[0036] Figure 5 This is an assembly diagram of the base, suction three-way valve, return three-way valve, suction pipe, return pipe, and electric heating element on the support plate.

[0037] Figure 6 This is a top-down 3D view of the left front side of the base;

[0038] Figure 7 It is a top-down 3D view of the left front side of the cover;

[0039] Figure 8 It is a three-dimensional view of the cover from an upward angle;

[0040] Figure 9 It is a 3D view of the suction three-way valve and the return three-way valve;

[0041] Figure 10 This is a three-dimensional view of the front left side of the valve body mounting base;

[0042] Figure 11 This is a top view of the valve body mounting base;

[0043] Figure 12 yes Figure 11 Longitudinal sectional view at position FF.

[0044] In the diagram: 1. Valve body mounting base; 2. Support plate; 3. Suction three-way valve; 4. Return three-way valve; 5. Suction pipe; 6. Return pipe; 7. Electric heating element; 8. Knob cover; 9. Electric actuator one; 10. Electric actuator two; 11. Connecting flange; 12. Relay; 13. Temperature control board; 14. Filter cartridge; 15. Drain pipe connector; 16. Cover; 17. Pipe connector one; 18. Pipe connector two; 19. Pipe connector three; 1-1. Base; 1-2. Pressure cap; 1-1a. Groove one; 1-1b. Groove two; 1-1c. Notch; 1-1d 1-2 countersunk mounting hole; 1-2a, groove three; 1-2b, groove four; 1-2c, groove five; 1-2d, through hole one; 1-2e, groove six; 1-2f, groove seven; 3-1, engine oil inlet; 3-2, auxiliary oil tank suction port; 3-3, main oil tank suction port; 4-1, engine oil return port; 4-2, auxiliary oil tank return port; 4-3, main oil tank return port; 5-1, suction pipe connector; 6-1, return pipe connector; 14-1, skirt; 14-2, through hole two; 14-3, through hole three; 14-4, through hole four; A, cavity one; B, cavity two. Detailed Implementation

[0045] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0046] Example

[0047] like Figures 1-12 As shown, this utility model is a fuel conversion device for a diesel engine, including a valve body mounting seat 1, which is mounted on the upper surface of a support plate 2. An electric actuator 9 and an electric actuator 10 are mounted on the upper surface of the valve body mounting seat 1. A suction three-way valve 3 and a return three-way valve 4 are installed inside the valve body mounting seat 1. The three ports of the suction three-way valve 3 are the engine inlet 3-1, the auxiliary fuel tank suction port 3-2, and the main fuel tank suction port 3-3. The three ports of the return three-way valve 4 are the engine return port 4-1, the auxiliary fuel tank return port 4-2, and the main fuel tank return port 4-3. A valve core is rotatably mounted inside the suction three-way valve 3. The valve core one has a valve core channel one and a valve core hole connecting the valve core channel one. The return oil three-way valve 4 has a valve core two rotatably installed inside. The valve core two has a valve core channel two and a valve core hole connecting the valve core channel two. The engine oil inlet 3-1, the auxiliary oil tank suction port 3-2 and the main oil tank suction port 3-3 form a suction three-way oil circuit through the valve core one. The engine oil return port 4-1, the auxiliary oil tank return port 4-2 and the main oil tank return port 4-3 form a return oil three-way oil circuit through the valve core two. The control end of the valve core one is connected to the electric actuator one 9. The electric actuator one 9 drives the valve core one to rotate to control the rotation and switching of the suction three-way oil circuit between the first state and the second state.

[0048] In the first state, the engine oil inlet 3-1 is connected to the auxiliary oil tank suction port 3-2 through the valve core channel 1;

[0049] In the second state, the engine oil inlet 3-1 is connected to the main oil tank suction port 3-3 through the valve core channel 1;

[0050] The control end of the valve core 2 is connected to the electric actuator 2 10. The electric actuator 2 10 drives the valve core 2 to rotate, thereby controlling the rotation switching of the return oil three-way oil circuit between the third and fourth states.

[0051] In the third state, the engine oil return port 4-1 is connected to the auxiliary oil tank oil return port 4-2 through the valve core channel two;

[0052] In the fourth state, the engine oil return port 4-1 is connected to the main oil tank oil return port 4-3 through the valve core channel two;

[0053] The lower end face of the support plate 2 has a heating component for heating the fuel inside the main fuel tank. The support plate 2 has a through-hole for fuel intake and a return hole, with the intake hole corresponding to the fuel intake port 3-3 of the main fuel tank and the return hole corresponding to the fuel return port 4-3 of the main fuel tank. Specifically, a temperature detection sensor extending downwards is also installed on the support plate 2.

[0054] Preferably, the valve body mounting base 1 includes a base 1-1 and a pressure cap 1-2. The upper end face of the base 1-1 has a groove 1-1a located in the horizontal transverse direction and two parallel grooves 1-1b located in the horizontal longitudinal direction. The lower end face of the pressure cap 1-2 has a groove 1-2a located in the horizontal transverse direction and two parallel grooves 1-2b located in the horizontal longitudinal direction. The base 1-1 is fixedly installed on the upper end face of the support plate 2, and the pressure cap 1-2 is correspondingly fastened to the base 1-1. The three grooves 1-2a are spliced ​​together to form cavity A. The two grooves 1-1b and 1-2b are spliced ​​together to form two cavities B. The suction three-way valve 3 is installed in one cavity B, and the return three-way valve 4 is installed in the other cavity B. The gland 1-2 is also provided with two through holes 1-2d. The control end of valve core 1 passes through one of the through holes 1-2d and is connected to electric actuator 9. The control end of valve core 2 passes through the other through hole 1-2d and is connected to electric actuator 10. Specifically, electric actuator 9 and electric actuator 10 are both fixedly installed on the upper surface of the gland 1-2 through the same connecting flange 11.

[0055] More preferably, the base 1-1 has a countersunk mounting hole 1-1d located at the bottom of the groove 1-1b, the support plate 2 has mounting holes, and the base 1-1 is fixedly mounted on the upper surface of the support plate 2 by screws passing through the countersunk mounting hole 1-1d.

[0056] The pressure cap 1-2 has a cross-section that is a "7"-shaped plate structure with a horizontal section extending forward. The front side of the vertical plate of the pressure cap 1-2 has a groove 5 1-2c corresponding to groove 4 1-2b. The pressure cap 1-2 and the base 1-1 have corresponding mounting holes and are fixed together by screws. The corresponding grooves 2 1-1b, 4 1-2b and 5 1-2c form a cavity 2B with a "7"-shaped structure in the axial longitudinal section. The main oil tank suction port 3-3 and the main oil tank return port 4-3 are both located in the corresponding cavity. At the vertical section port of body 2B, one of the engine oil inlet 3-1 and the auxiliary oil tank suction port 3-2 is located at a horizontal section port of a corresponding cavity 2B, and the other of the engine oil inlet 3-1 and the auxiliary oil tank suction port 3-2 is located at a port of cavity 1A. One of the engine oil return port 4-1 and the auxiliary oil tank return port 4-2 is located at another horizontal section port of another corresponding cavity 2B, and the other of the engine oil return port 4-1 and the auxiliary oil tank return port 4-2 is located at another port of cavity 1A.

[0057] More preferably, both the engine oil inlet 3-1 and the engine oil return port 4-1 are equipped with pipe connector 17, and both the auxiliary oil tank suction port 3-2 and the auxiliary oil tank return port 4-2 are equipped with pipe connector 28. Both pipe connector 17 and pipe connector 28 face the front side of the valve body mounting seat 1. The auxiliary oil tank suction port 3-2 is located at the horizontal section port of one corresponding cavity 2B, and the auxiliary oil tank return port 4-2 is located at the horizontal section port of another corresponding cavity 2B.

[0058] More preferably, the top of the pressure cap 1-2 is provided with a groove six 1-2e and a groove seven 1-2f. A relay 12 is installed inside the groove six 1-2e, and a temperature control plate 13 is installed inside the groove seven 1-2f. The heating component is a plurality of electric heating elements 7 extending to the bottom of the support plate 2. The plurality of electric heating elements 7, relays 12 and temperature control plates 13 constitute an electric heating system for heating the fuel inside the main fuel tank.

[0059] More preferably, the upper end face of the valve body mounting base 1 is equipped with a cover 16 that covers the electric actuator 9, the electric actuator 10, the relay 12 and the temperature control board 13.

[0060] More preferably, the support plate 2 is fixedly connected with a downwardly extending oil suction pipe 5 and an oil return pipe 6. The upper end of the oil suction pipe 5 passes through the oil suction hole on the support plate 2 and is provided with an oil suction pipe connector 5-1. The upper end of the oil return pipe 6 passes through the oil return hole on the support plate 2 and is provided with an oil return pipe connector 6-1. The main oil tank suction port 3-3 and the main oil tank return port 4-3 are both equipped with "7"-shaped pipe connectors 3-19. The vertical section of the pipe connector 3-19 installed on the main oil tank suction port 3-3 is inserted into the oil suction pipe connector 5-1. The vertical section of the pipe connector 3 19, which is installed on the return oil port 4-3 of the main oil tank, is fixedly connected together with the return oil pipe connector 6-1. The suction pipe connector 5-1 and the corresponding vertical section of the pipe connector 3 19 are respectively fitted with knob covers 8. The base 1-1 has a notch 1-1c corresponding to the groove 2 1-1b on the rear side. The vertical section of the pipe connector 3 19 is embedded in the corresponding notch 1-1c.

[0061] More preferably, it also includes a filter cylinder 14, the upper port of which has a skirt 14-1 extending inward to the circumference. The support plate 2 is a flange plate. The support plate 2 and the skirt 14-1 are provided with a plurality of corresponding mounting holes spaced apart in a circumferential manner. The filter cylinder 14 is fixedly connected together by screws passing through the corresponding mounting holes on the support plate 2 and the skirt 14-1. The oil suction pipe 5, the oil return pipe 6 and the electric heating element 7 are all located inside the filter cylinder 14.

[0062] More preferably, the bottom outer periphery of the filter cylinder 14 is provided with a plurality of through holes 14-2, each corresponding to a mounting hole on the skirt 14-1; the bottom of the filter cylinder 14 is also provided with a plurality of through holes 14-3, each corresponding to a plurality of electric heating elements 7; the bottom of the filter cylinder 14 is also provided with a through hole 14-4 for mounting a liquid level sensor. Specifically, a liquid level sensor corresponding to through hole 14-4 is fixedly mounted on the lower end face of the support plate 2.

[0063] Preferably, the support plate 2 is provided with a waste discharge through hole that penetrates the plate body, and a drain pipe joint 15 extending to the upper end face of the support plate 2 is installed inside the waste discharge through hole.

[0064] The working principle of the fuel conversion device for diesel engines according to this utility model is as follows:

[0065] In use, the fuel conversion device for a diesel engine of this invention is inverted and embedded in the fuel conversion device mounting hole at the bottom of the main fuel tank. The support plate 2 is then fixedly connected to the bottom of the main fuel tank using screws. The suction pipe 5, return pipe 6, electric heating element 7, and temperature sensor are located inside the main fuel tank, while the valve body mounting seat 1 is located outside the main fuel tank. The suction three-way valve is in its second state, and the return three-way valve is in its fourth state. The engine inlet 3-1 is connected to the main fuel tank suction port 3-3 via valve core channel one, and the engine return port 4-1 is connected to the main fuel tank return port 4-3 via valve core channel two. The main fuel tank is filled with 0# diesel fuel, and the auxiliary fuel tank is filled with... Taking -35# diesel as an example; when the ambient temperature is low, such as -25℃ in northern winters, the control system in the cab activates the operation button for heating the fuel inside the main fuel tank. The control system first sends a rotation command to electric actuator 9, which drives valve core 1 to change the oil passage of the suction three-way valve from the second state to the first state. Engine inlet 3-1 is connected to auxiliary fuel tank suction port 3-2 through valve core channel 1, supplying fuel to the engine from the auxiliary fuel tank. After a delay (e.g., 60-100 seconds), the control system sends a rotation command to electric actuator 10, which then drives valve core 2 to change the oil passage of the return three-way valve from the fourth state to the third state. Engine return port 4-1 is connected to auxiliary fuel tank return port 4-2 via valve core channel 2. Through this, electric actuator 210 drives valve core 2 to perform a delayed switching, ensuring that the small amount of residual #0 diesel fuel in the fuel line flows back entirely to the main fuel tank. During this process, electric heating element 7 heats the fuel inside the main fuel tank, and temperature detection sensor transmits the detected fuel temperature signal to the control system in real time. When the fuel temperature inside the main fuel tank reaches the set temperature value, the control system first sends a rotation command to electric actuator 9. Electric actuator 9 then drives valve core 1 to change the oil suction three-way valve from the first state to the second state. Engine inlet port 3-1 is connected to... The main fuel tank suction port 3-3 is connected, and fuel is supplied to the engine from the main fuel tank. After a certain delay (e.g., 40-60 seconds), the control system sends a rotation command to the electric actuator 10. The electric actuator 10 then drives the valve core 2 to change the return oil three-way oil circuit from the third state to the fourth state. That is, the engine return oil port 4-1 is connected to the main fuel tank return oil port 4-3 through the valve core channel 2. Through this delayed switching driven by the electric actuator 10, most of the small amount of -35# diesel fuel remaining in the oil circuit flows back to the auxiliary fuel tank, which helps to save the cost of -35# diesel fuel in the auxiliary fuel tank. This ensures that when the engine is stopped, the suction three-way oil circuit is in the second state and the return three-way oil circuit is in the fourth state.

[0066] This utility model discloses a fuel conversion device for a diesel engine. An electric actuator for driving the valve core, a valve body mounting base, a support plate, and a heating assembly are arranged longitudinally in sequence. The suction three-way valve and the return three-way valve are installed inside the valve body mounting base. The overall structure is compact and reasonable, significantly reducing the lateral width and overall volume of the fuel conversion device. Furthermore, when in use, the fuel conversion device is inverted and embedded in the fuel conversion device mounting hole at the bottom of the main fuel tank. Its support plate is fixedly installed at the bottom of the main fuel tank, the valve body mounting base and the electric actuator are located below the bottom of the main fuel tank, and the heating assembly is located inside the main fuel tank. This effectively reduces the space requirements for installation and use of the fuel conversion device.

[0067] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A fuel conversion device for a diesel engine, characterized by, The utility model provides a valve body mounting seat (1) is installed on the upper end surface of support plate (2), the upper end surface of valve body mounting seat (1) installs electric actuator one (9) and electric actuator two (10), the inside of valve body mounting seat (1) installs oil suction three way valve (3) and oil return three way valve (4), the three ports of oil suction three way valve (3) are engine oil inlet (3-1), auxiliary oil tank oil suction (3-2) and main oil tank oil suction (3-3) respectively, the three ports of oil return three way valve (4) are engine oil return (4-1), auxiliary oil tank oil return (4-2) and main oil tank oil return (4-3) respectively, the inside rotary mounting of oil suction three way valve (3) has valve core one, the valve core one has valve core passage one and the valve core hole of intercommunication valve core passage one, the inside rotary mounting of oil return three way valve (4) has valve core two, the valve core two has valve core passage two and the valve core hole of intercommunication valve core passage two, engine oil inlet (3-1), auxiliary oil tank oil suction (3-2) and main oil tank oil suction (3-3) are switched through valve core one and form oil suction three way oil circuit, engine oil return (4-1), auxiliary oil tank oil return (4-2) and main oil tank oil return (4-3) are switched through valve core two and form oil return three way oil circuit, the control end of valve core one is connected with electric actuator one (9), and engine oil inlet (3-1) is connected with auxiliary oil tank oil suction (3-2) through valve core passage one in the first state of oil suction three way oil circuit. In the second state, engine oil inlet (3-1) is connected with main oil tank oil suction (3-3) through valve core passage one. The control end of valve core two is connected with electric actuator two (10), and engine oil return (4-1) is connected with auxiliary oil tank oil return (4-2) through valve core passage two in the third state of oil return three way oil circuit. In the fourth state, engine oil return (4-1) is connected with main oil tank oil return (4-3) through valve core passage two. The lower end surface of support plate (2) has a heating assembly for heating the fuel in the main oil tank, and the oil suction hole and the oil return hole are formed in the support plate (2), and the oil suction hole corresponds to the main oil tank oil suction (3-3), and the oil return hole corresponds to the main oil tank oil return (4-3). ​ ​ 2. The fuel conversion device for a diesel engine according to claim 1, characterized by, The valve body mounting seat (1) includes a base (1-1) and a gland (1-2), the upper end surface of the base (1-1) has a groove one (1-1a) in the horizontal transverse direction and two parallel and spaced grooves two (1-1b) in the horizontal longitudinal direction, the lower end surface of the gland (1-2) has a groove three (1-2a) in the horizontal transverse direction and two parallel and spaced grooves four (1-2b) in the horizontal longitudinal direction, the base (1-1) is fixedly installed on the upper end surface of the support plate (2), the gland (1-2) is correspondingly and tightly installed on the base (1-1), and the groove one (1-1a) and the groove three (1-2a) are correspondingly spliced to form a cavity one (A), the two groove two (1-1b) and the two groove four (1-2b) are correspondingly spliced to form two cavity two (B), the oil suction three-way valve (3) is installed in one of the cavity two (B), the oil return three-way valve (4) is installed in the other cavity two (B), the gland (1-2) is further provided with two through holes one (1-2d), the control end of the valve core one passes through one of the through holes one (1-2d) and is connected with the electric actuator one (9), and the control end of the valve core two passes through the other through hole one (1-2d) and is connected with the electric actuator two (10).

3. The fuel conversion device for a diesel engine according to claim 2, characterized by, The base (1-1) is provided with a countersunk mounting hole (1-1d) at the bottom of the groove two (1-1b), the support plate (2) is provided with a mounting hole, and the base (1-1) is fixedly installed on the upper end surface of the support plate (2) by penetrating the screw in the countersunk mounting hole (1-1d); The cross section of the gland (1-2) is a "7" shaped plate body structure extending to the front side of the horizontal section, the vertical plate front side of the gland (1-2) has a groove five (1-2c) corresponding to the groove four (1-2b), the gland (1-2) and the base (1-1) are provided with corresponding mounting holes, and the two are fixedly connected by screws, and the corresponding groove two (1-1b), groove four (1-2b) and groove five (1-2c) form a cavity two (B) with a "7" shaped structure in the axial longitudinal section, the main oil tank oil suction port (3-3) and the main oil tank oil return port (4-3) are located at the vertical section port of the corresponding cavity two (B), one of the engine oil inlet (3-1) and the auxiliary oil tank oil suction port (3-2) is located at the horizontal section port of one corresponding cavity two (B), the other of the engine oil inlet (3-1) and the auxiliary oil tank oil suction port (3-2) is located at one port of the cavity one (A), and one of the engine oil return port (4-1) and the auxiliary oil tank oil return port (4-2) is located at the horizontal section port of the other corresponding cavity two (B), and the other of the engine oil return port (4-1) and the auxiliary oil tank oil return port (4-2) is located at the other port of the cavity one (A).

4. The fuel conversion device for a diesel engine according to claim 3, characterized by, The engine oil inlet (3-1) and the engine oil return port (4-1) are provided with pipe joint one (17), the auxiliary oil tank oil suction port (3-2) and the auxiliary oil tank oil return port (4-2) are provided with pipe joint two (18), and the pipe joint one (17) and the pipe joint two (18) are towards the front side of the valve body mounting seat (1), the auxiliary oil tank oil suction port (3-2) is located at the horizontal section port of the corresponding cavity two (B), and the auxiliary oil tank oil return port (4-2) is located at the horizontal section port of the other corresponding cavity two (B).

5. The fuel conversion device for a diesel engine according to claim 4, characterized by, The top of the gland (1-2) is provided with groove six (1-2e) and groove seven (1-2f), the inside of the groove six (1-2e) is provided with a relay (12), the inside of the groove seven (1-2f) is provided with a temperature control plate (13), the heating assembly is a plurality of electric heating elements (7) extending below the support plate (2), and the plurality of electric heating elements (7), the relay (12) and the temperature control plate (13) constitute an electric heating system for heating the fuel in the main oil tank.

6. The fuel conversion device for a diesel engine according to claim 5, characterized by, The upper end surface of the valve body mounting seat (1) is provided with a cover body (16) covering the outside of the electric actuator one (9), the electric actuator two (10), the relay (12) and the temperature control plate (13).

7. The fuel conversion device for a diesel engine according to any one of claims 2 to 6, characterized by, The support plate (2) is provided with an oil suction pipe (5) and an oil return pipe (6) extending downward, the upper end of the oil suction pipe (5) penetrates the oil suction hole in the support plate (2) and is provided with an oil suction pipe joint (5-1), the upper end of the oil return pipe (6) penetrates the oil return hole in the support plate (2) and is provided with an oil return pipe joint (6-1), the main oil tank oil suction port (3-3) and the main oil tank oil return port (4-3) are provided with a "7" shaped pipe joint three (19), the vertical section of the pipe joint three (19) installed on the main oil tank oil suction port (3-3) is inserted and fixedly connected with the oil suction pipe joint (5-1), the vertical section of the pipe joint three (19) installed on the main oil tank oil return port (4-3) is inserted and fixedly connected with the oil return pipe joint (6-1), and the outside of the oil suction pipe joint (5-1) and the vertical section of the corresponding pipe joint three (19) and the outside of the oil return pipe joint (6-1) and the vertical section of the corresponding pipe joint three (19) are respectively provided with a knob cover (8), and the rear side of the base (1-1) is provided with a notch groove (1-1c) corresponding to the groove two (1-1b), and the vertical section of the pipe joint three (19) is embedded in the corresponding notch groove (1-1c).

8. The fuel conversion device for a diesel engine according to claim 7, characterized by, It also includes a filter cartridge (14), the upper port of the filter cartridge (14) has a skirt (14-1) extending to the inner circumferential side, the support plate (2) is a flange plate, a plurality of corresponding mounting holes are arranged on the support plate (2) and the skirt (14-1) in a ring shape, and the filter cartridge (14) is fixedly connected together by screws penetrating the corresponding mounting holes in the support plate (2) and the skirt (14-1), and the oil suction pipe (5), the oil return pipe (6) and the electric heating element (7) are located in the filter cartridge (14).

9. The fuel conversion device for a diesel engine according to claim 8, characterized by, The filter cartridge (14) is provided with a plurality of through holes two (14-2) on the bottom outer periphery, a plurality of through holes two (14-2) correspond to the mounting holes on the skirt (14-1) one by one; the bottom of the filter cartridge (14) is also provided with a plurality of through holes three (14-3), a plurality of through holes three (14-3) correspond to a plurality of electric heating elements (7) one by one; the bottom of the filter cartridge (14) is also provided with a through hole four (14-4) for installing a liquid level sensor.

10. The fuel conversion device for a diesel engine according to claim 1, characterized by, The support plate (2) is provided with a waste discharge through hole penetrating the plate body, and the waste discharge through hole is internally provided with a discharge pipe joint (15) extending to the upper end surface of the support plate (2).

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