Special vehicle fuel tank and its draining tool

Abstract

The application provides a special vehicle fuel tank and a fuel draining tool. The fuel tank is formed by steel plates through corner-to-corner welding, and has high welding strength and good overall structural reliability. The fuel tank is fixed to the deck of the vehicle body in the form of a cantilever beam by a support and fixing bolts, and the overall fuel tank is fixed reliably. The oil filler port is closed by a float to prevent fuel overflow. The fuel draining port is designed with a spring and a steel ball, and the fuel tank is manually controlled by the fuel draining tool. The fuel draining tool is welded with a fuel draining connector on the fuel draining connector, and is suitable for fuel draining ports of different specifications. The fuel tank can be drained by manual control. The application has good reliability and maintainability, and can meet the requirements of fuel receiving speed and reliability.

Description

Technical Field

[0001] This invention belongs to the field of power auxiliary system design technology for tracked special vehicles, specifically relating to a fuel tank for a special vehicle and its fuel draining tool. Background Technology

[0002] Fuel tanks are an indispensable component of tracked special vehicles at present. They provide fuel to these vehicles through the fuel supply system, which is then converted into mechanical energy for vehicle operation. The structural design of fuel tanks for special vehicles needs to simultaneously consider refueling speed requirements, reliability requirements, and maintainability requirements. Refueling speed requirements involve the design of the refueling and discharging ports, while reliability and maintainability requirements involve the fuel tank's fixing method, tank structure design, and the design of the fuel drain port structure and draining tools. Currently, fuel tank designs for tracked special vehicles in my country primarily use aluminum-based and steel-based materials. However, with the increasing demands for fuel tank reliability in new vehicles, it is now necessary to consider novel structural designs from a design perspective to meet these requirements. Summary of the Invention

[0003] (a) Technical problems to be solved This invention proposes a special vehicle fuel tank and its fuel draining tool to solve the technical problems of how to improve reliability, enhance maintenance performance, and meet the requirements for refueling speed.

[0004] (II) Technical Solution To solve the above-mentioned technical problems, the present invention proposes a special vehicle fuel tank, which includes a shell, spacers, attachments, a filler neck, a drain neck, and an outlet neck. Multiple spacers are provided between the inner and outer panels of the shell, the attachments are fixed to the vehicle body, and multiple shell fixing bolts are threadedly connected to the corresponding attachments via the spacers to fix the shell to the vehicle body. The filler neck is located at the top of the shell, and the drain neck and outlet neck are located at the bottom of the shell.

[0005] Furthermore, the shell is constructed by welding multiple steel plates together at angles to angles.

[0006] Furthermore, the filler port includes a filler port screw plug seat, a filler port screw plug, a filler port filter screen, a filler port cover, a filler port combination washer, a cover fixing bolt, and a cover mounting washer; wherein, the filler port screw plug seat is fixedly connected to the outside of the top opening of the housing by bolts, the filler port filter screen is installed on the inside of the top opening and located at the center of the filler port screw plug seat, the filler port screw plug is connected to the central threaded hole of the filler port screw plug seat by external thread, and the filler port screw plug is provided with a shaft that is coaxially connected to the central threaded hole of the filler port screw plug seat. The fuel filler cap includes a vent hole and a radial vent hole that communicates with the axial vent hole. A float is installed in the fuel filler cap filter. When the fuel tank is full, the float rises and blocks the axial vent hole of the fuel filler cap plug, preventing fuel leakage. When the fuel tank is not full, the float opens the vent hole, ensuring normal venting of the fuel tank. The fuel filler cap cover is fixed to the housing by cover fixing bolts and cover mounting washers, and covers the outside of the fuel filler cap plug to reduce dust entering the fuel filler cap plug.

[0007] Furthermore, a filler port assembly washer is provided on the contact end face between the filler port plug and the filler port plug seat.

[0008] Furthermore, a steel wire connects the filler cap screw plug and the filler cap screw plug seat, and a lead seal is installed on the steel wire.

[0009] Furthermore, the oil drain port includes an oil drain plug seat, an oil drain plug, an oil drain combination washer, a steel ball washer, a spring, and a steel ball. The oil drain plug seat is welded to the outside of the bottom opening of the housing. The steel ball washer and the oil drain plug are screwed upwards through the central threaded hole of the oil drain plug seat. The outer circumference of the oil drain plug has an external hexagonal structure. The contact end face between the oil drain plug and the oil drain plug seat is provided with an oil drain combination washer. The steel ball is positioned on top of the steel ball washer, and a spring is installed on top of the steel ball. After removing the oil drain plug, the steel ball is pushed upwards using an oil draining tool to open the channel for oil draining. After completing the oil draining operation, the oil draining tool is removed. The steel ball, under the action of the spring, presses against the steel ball washer. After the oil drain plug is installed, the oil drain port is sealed, achieving controllable oil draining.

[0010] Furthermore, this invention also proposes a fuel tank draining tool for special vehicles, which includes a drain pipe, a first drain connector, and a second drain connector. The first and second drain connectors are respectively located at both ends of the drain pipe. Each drain connector has a steel ball lifting portion at its front end and a threaded portion at its rear. The threaded portions of the first and second drain connectors are screwed into the central threaded hole of the drain plug seat, thereby lifting the steel ball through the steel ball lifting portion at the front end to drain the fuel. After draining, the threaded portion of the draining tool is unscrewed from the central threaded hole of the drain plug seat, and the steel ball is then pushed back to its original position by a spring, thus sealing the drain port.

[0011] Furthermore, the thread specifications of the first and second drain connectors are different.

[0012] (III) Beneficial Effects This invention proposes a special vehicle fuel tank and its draining tool. The fuel tank structure is formed by corner-to-corner welding of steel plates, resulting in high welding strength and good overall structural reliability. The fuel tank is fixed to the vehicle body deck using a cantilever beam configuration with mounting brackets and fixing bolts, ensuring reliable overall tank fixation. The filler neck uses a float mechanism to close the vent when full and open when low, automatically adjusting to prevent fuel overflow. The drain port utilizes a spring and steel ball design, allowing for manual control of fuel draining via a draining tool. The structure is simple and easy to maintain. The draining tool, with a drain connector welded to the drain hose, accommodates different drain port sizes, allowing for manual fuel draining. This invention offers high reliability and maintainability, simultaneously meeting requirements for both refueling speed and reliability. Attached Figure Description

[0013] Figure 1 This is a front view of the special vehicle fuel tank structure of the present invention; Figure 2 This is a left view of the internal structure of the fuel tank of the special vehicle according to the present invention; Figure 3 This is a perspective view of the fuel tank structure of the special vehicle in this invention; Figure 4 This is a schematic diagram of the weld seam of the fuel tank shell in this invention; Figure 5 This is a schematic diagram of the structure in this invention where the shell is fixed to the vehicle body; Figure 6 This is a schematic diagram of the fuel tank filler neck structure in this invention; Figure 7 This is a schematic diagram of the fuel tank drain port structure in this invention; Figure 8 This is a schematic diagram of the fuel tank draining tool in this invention. Detailed Implementation

[0014] To make the objectives, contents, and advantages of the present invention clearer, the specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0015] This embodiment proposes a fuel tank for a special vehicle, the overall structure of which is as follows: Figures 1-3 As shown, it mainly includes a housing 1, an oil drain port 2, a spacer 3, an oil filler port 4, an auxiliary seat 6, a handle 9, and an oil outlet 10. Among them, as... Figure 4As shown, the housing 1 is constructed by welding multiple steel plates together diagonally. Multiple spacers 3 are provided between the inner and outer panels of the housing 1. The mounting brackets 6 are welded to the vehicle body. Multiple housing fixing bolts 5, along with flat washers 8 and ball washers 7, are threadedly connected to the corresponding mounting brackets 6 via the spacers 3, thus fixing the housing 1 to the vehicle body. Figure 5 As shown. The inner side of the housing 1 is in contact with the vehicle body surface, and the direction of gravity is supported by the cantilever beam structure formed by the attachment 6 and the housing fixing bolts 5, ensuring that the fuel tank is securely fixed.

[0016] The filler port 4 is located on the top of the housing 1, such as... Figure 6 As shown, the filler nozzle 4 mainly includes a filler nozzle screw plug seat 24, a filler nozzle screw plug 11, a filler nozzle filter screen 12, a filler nozzle cover 13, a filler nozzle combination washer 15, a cover fixing bolt 20, a cover mounting washer 21, a lead seal 22, and a steel wire 23. The filler nozzle screw plug seat 24 is bolted to the outside of the top opening of the housing 1. The filler nozzle filter screen 12 is installed on the inside of the top opening and is located at the center of the filler nozzle screw plug seat 24, used to filter out impurities that may be present in the filler nozzle. The filler nozzle screw plug 11 is connected to the central threaded hole of the filler nozzle screw plug seat 24 via an external thread. A filler nozzle combination washer 15 is provided on the contact end face between the filler nozzle screw plug 11 and the filler nozzle screw plug seat 24. The filler nozzle screw plug 11 is provided with an axial vent hole coaxially connected to the central threaded hole of the filler nozzle screw plug seat 24, and a radial vent hole connected to the axial vent hole. A float is installed in the fuel filler filter 12. When the housing 1 is full of fuel, the float rises and blocks the axial vent hole of the fuel filler plug 11, preventing fuel from leaking out. When the fuel filler is not full, the float opens the vent hole, ensuring normal venting of the fuel tank. The fuel filler cover 13 is fixed to the housing 1 by cover fixing bolts 20 and cover mounting washers 21, and covers the outside of the fuel filler plug 11 to reduce dust entering the fuel filler plug 11. A steel wire 23 connects the fuel filler plug 11 and the fuel filler plug seat 24, and a lead seal 22 is installed on the steel wire 23.

[0017] The oil drain port 2 is located at the bottom of the housing 1, such as... Figure 7As shown, the drain port 2 mainly includes a drain port screw plug seat 25, a drain port screw plug 17, a drain port combination washer 14, a steel ball washer 16, a spring 18, and a steel ball 19. The drain port screw plug seat 25 is welded to the outside of the bottom opening of the housing 1. The steel ball washer 16 and the drain port screw plug 17 are screwed upwards through the central threaded hole of the drain port screw plug seat 25. The outer circumference of the drain port screw plug 17 has an external hexagonal structure, and the drain port combination washer 14 is provided on the contact end face between the drain port screw plug 17 and the drain port screw plug seat 25. The steel ball 19 is located on top of the steel ball washer 16, and the top of the steel ball 19 is provided with the spring 18. After removing the drain port screw plug 17 using a hexagonal tool such as a socket, the steel ball 19 is pushed upwards using a draining tool to open the channel for draining oil, thus performing the draining operation. After the oil draining operation is completed, the oil draining tool is removed. The steel ball 19 presses against the steel ball washer 16 under the action of the spring 18. After the oil drain plug 17 is installed, the oil drain port 2 is sealed, thus achieving controllable oil draining.

[0018] The structure of the oil draining tool is as follows Figure 8 As shown, the device includes an oil drain pipe 26, a first oil drain connector 27, and a second oil drain connector 28. The first oil drain connector 27 and the second oil drain connector 28 are respectively located at both ends of the oil drain pipe 26. Each oil drain connector has a steel ball lifting portion at its front end and a threaded portion at its rear. The threaded portions of the first oil drain connector 27 and the second oil drain connector 28 have different specifications to accommodate the central threaded holes of different sized oil drain plug seats 25. The threaded portions of the first oil drain connector 27 and the second oil drain connector 28 are screwed into the central threaded holes of the oil drain plug seats 25, thereby lifting the steel ball 19 through the steel ball lifting portion at the front end to achieve oil draining. After the oil draining operation is completed, the threaded portion of the oil draining tool is unscrewed from the central threaded hole of the oil drain plug seat 25, and the steel ball 19 is then pushed back to its original position by the spring 18, achieving a seal at the oil drain port 2.

[0019] The above description is only a preferred embodiment of the present invention. 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 invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A fuel tank for a special vehicle, characterized in that, The special vehicle fuel tank includes a shell, spacers, mounts, a filler neck, a drain neck, and an outlet neck. Multiple spacers are provided between the inner and outer panels of the shell. The mounts are fixed to the vehicle body. Multiple shell fixing bolts are threadedly connected to the corresponding mounts via the spacers to fix the shell to the vehicle body. The filler neck is located at the top of the shell, and the drain neck and outlet neck are located at the bottom of the shell.

2. The special vehicle fuel tank as described in claim 1, characterized in that, The shell is formed by welding multiple steel plates together diagonally.

3. The special vehicle fuel tank as described in claim 1, characterized in that, The filler port includes a filler port screw plug seat, a filler port screw plug, a filler port filter screen, a filler port cover, a filler port combination washer, a cover fixing bolt, and a cover mounting washer. The filler port screw plug seat is bolted to the outside of the top opening of the housing. The filler port filter screen is installed inside the top opening and located at the center of the filler port screw plug seat. The filler port screw plug is connected to the central threaded hole of the filler port screw plug seat via an external thread. The filler port screw plug has an axial connection coaxially communicating with the central threaded hole of the filler port screw plug seat. The fuel filler cap includes a vent hole and a radial vent hole that communicates with the axial vent hole. A float is installed in the fuel filler cap filter. When the fuel tank is full, the float rises and blocks the axial vent hole of the fuel filler cap plug, preventing fuel leakage. When the fuel tank is not full, the float opens the vent hole, ensuring normal venting of the fuel tank. The fuel filler cap cover is fixed to the housing by cover fixing bolts and cover mounting washers, and covers the outside of the fuel filler cap plug to reduce dust entering the fuel filler cap plug.

4. The special vehicle fuel tank as described in claim 3, characterized in that, A filler port combination washer is provided on the contact end face between the filler port plug and the filler port plug seat.

5. The special vehicle fuel tank as described in claim 3, characterized in that, A steel wire is connected between the filler cap screw plug and the filler cap screw plug seat, and a lead seal is installed on the steel wire.

6. The special vehicle fuel tank as described in claim 2, characterized in that, The oil drain port includes an oil drain plug seat, an oil drain plug, an oil drain combination washer, a steel ball washer, a spring, and a steel ball. The oil drain plug seat is welded to the outside of the bottom opening of the housing. The steel ball washer and the oil drain plug are screwed upwards through the central threaded hole of the oil drain plug seat. The outer circumference of the oil drain plug has an external hexagonal structure. The contact end face between the oil drain plug and the oil drain plug seat is provided with an oil drain combination washer. The steel ball is positioned on top of the steel ball washer, and a spring is installed on top of the steel ball. After removing the oil drain plug, the steel ball is pushed upwards using an oil draining tool to open the channel for oil draining. After the oil draining operation is completed, the oil draining tool is removed. The steel ball, under the action of the spring, presses against the steel ball washer. After the oil drain plug is installed, the oil drain port is sealed, achieving controllable oil draining.

7. A fuel draining tool for a special vehicle, characterized in that, The special vehicle fuel tank draining tool includes a drain pipe, a first drain connector, and a second drain connector. The first and second drain connectors are respectively located at both ends of the drain pipe. Each drain connector has a steel ball lifting part at its front end and a threaded part at its rear end. The threaded parts of the first and second drain connectors are screwed into the central threaded hole of the drain plug seat, thereby lifting the steel ball through the steel ball lifting part at the front end to drain the fuel. After the draining operation is completed, the threaded part of the draining tool is screwed out from the central threaded hole of the drain plug seat, and the steel ball is pushed back to its original position by the spring to seal the drain port.

8. The special vehicle fuel tank draining tool as described in claim 7, characterized in that, The thread specifications of the first and second drain connectors are different.

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