A device for removing rust from inside a fuel tank of an excavator

Abstract

This invention discloses a rust removal device for the inside of an excavator fuel tank, relating to the field of excavator auxiliary equipment technology. It includes an outer frame and an inner frame, which are separately configured. The outer frame has a through hole and a hydraulic pump is mounted on it. The inner frame has a hydraulic support pipe connected to the hydraulic pump. The inner frame has a folding structure. A steel brush is mounted on one side of the inner frame, and an external magnet is detachably connected to one side of the outer frame. An internal magnet is mounted on the side of the inner frame where the steel brush is located. In use, the rust removal device for the inside of an excavator fuel tank, provided by this invention, allows the device to be inserted through the fuel inlet, expand inside the fuel tank, and then fit snugly against the top of the tank. By sliding the outer frame synchronously with the inner frame, rust removal is performed inside the fuel tank.

Description

Technical Field

[0001] This invention relates to the field of excavator auxiliary equipment technology, and in particular to a rust removal device for the inside of an excavator fuel tank. Background Technology

[0002] Excavators typically have two fuel tanks: a fuel tank and a hydraulic oil tank. These are clearly distinguishable. The fuel tank cap looks similar to that of a regular vehicle's fuel tank, while the hydraulic oil tank cap is quite unique. They are easy to differentiate. Therefore, when people generally refer to the engine oil tank, they are referring to the fuel tank.

[0003] Fuel tanks are generally made of thin-walled steel plates through stamping or welding. If the fuel tank is welded, the thickness of the steel plate must not be less than 5mm, otherwise deformation is likely to occur. After the fuel tank is processed, the welding slag must be thoroughly cleaned and the tank must be pickled and phosphated.

[0004] Commercially available fuel tanks are made of low-carbon steel plates, also known as iron plates. Their advantages include good toughness, ease of processing, and low price. The exterior is coated with anti-rust paint and metallic paint, and their strength and weather resistance meet requirements. The disadvantage is that the inner wall lacks anti-oxidation measures, making it prone to rusting. Especially at the top of the tank, even when full, air pockets remain, and because fuel often contains moisture, the top rusts particularly severely. Using stainless steel for fuel tanks is certainly better than iron plates, but the cost is higher. Plastic tanks won't rust, but there is a risk of generating static sparks.

[0005] Rust in the fuel tank can contaminate the fuel, and during use, the rust can enter various drive components of the excavator through the fuel lines, greatly affecting the overall service life of the excavator.

[0006] An existing invention patent with publication number CN204488483U discloses a novel rust-proof oil tank, comprising a tank body, an oil outlet pipe, an oil return pipe, a refueling pipe, rust-proof columns, sealing rings, and bolts. The tank body is respectively equipped with the oil outlet pipe, oil return pipe, and refueling pipe. Multiple rust-proof columns are fixed inside the tank body by bolts. Sealing rings are provided at the contact surfaces between the rust-proof columns and the inner wall of the tank body. A zinc layer is plated on the outer surface of the rust-proof columns inside the tank body.

[0007] The aforementioned technical solution provides a novel rust-proof fuel tank. Utilizing the chemical reactivity of zinc, corrosive substances in the tank react with the zinc first, preventing them from reacting with the tank's iron inner wall and thus preventing corrosion of the tank itself. Furthermore, multiple rust-proof columns inside the tank ensure sufficient contact between the zinc layer and the corrosive substances. These columns are bolted to the tank, facilitating easy replacement and ensuring the tank's rust-proof capability. However, excavators typically have a service life of around ten years, with an average annual usage of 2000 hours. Within this timeframe, even with a simple galvanizing process, the fuel tank still requires inspection and zinc replenishment every six months. Moreover, because excavator fuel tanks are manufactured using a one-piece casting process, with only a small space connecting it to the interior through the fuel inlet, cleaning the excavator fuel tank remains difficult, and the technical problem of cleaning rust inside the tank remains unresolved. Summary of the Invention

[0008] To address the aforementioned technical problems, the purpose of this invention is to provide a rust removal device for the inside of an excavator fuel tank. By setting up an outer frame and an inner frame, the device can be inserted into the fuel inlet and then spread out inside the fuel tank, and then closely attached to the top of the fuel tank. The inner frame is slid simultaneously with the outer frame to perform rust removal operations inside the fuel tank.

[0009] The above-mentioned technical objective of the present invention is achieved through the following technical solution:

[0010] A rust removal device for the inside of an excavator fuel tank includes an outer frame and an inner frame, which are separately arranged. The outer frame has a through hole and a hydraulic pump is installed on it. The inner frame has a hydraulic support pipe connected to the hydraulic pump. The inner frame has a folding structure. A steel brush is installed on one side of the inner frame. An external magnet is detachably connected to one side of the outer frame. An internal magnet is installed on the side of the inner frame where the steel brush is located.

[0011] By adopting the above technical solution, the device can be inserted into the oil inlet and then spread out inside the oil tank. It can then be placed tightly against the top of the oil tank, and the inner frame can be slid synchronously with the outer frame to remove rust from the inside of the oil tank.

[0012] The present invention is further configured such that: the inner frame includes a central plate and a long support plate, the steel brush is provided on both the central frame and the long support plate, side plates are provided on both sides of the steel brush on both the central frame and the long support plate, a fixing ring is provided on the long support plate and the side away from the side where the steel brush is provided, and the hydraulic support pipe is provided inside the fixing ring.

[0013] By adopting the above technical solution, the inner frame of this device can be inserted into the fuel tank when it is in a folded state, and then supported by hydraulic support pipes. With the help of magnets on the outer frame, it can be pressed against the top wall of the fuel tank to achieve cleaning and rust removal.

[0014] The invention is further configured such that: a short support plate is rotatably connected to one end of each of the two long support plates away from the center plate; the short support plate is also provided with the steel brush and side plate on one side, and a fixing ring on the other side; the hydraulic support pipe passes through the fixing ring provided on the short support plate and is fixedly connected to the short support plate at its end.

[0015] By adopting the above technical solution, rust removal and cleaning can be performed on the side wall of the fuel tank.

[0016] The present invention is further configured such that: the side plate is slidably connected to the long support plate and the center plate; a spring is provided between the side plate and the long support plate and the center plate; and a ball bearing is provided on one side of the side plate.

[0017] By adopting the above technical solution, scratches can be prevented on the top and side walls of the fuel tank, and rust can be prevented from falling off.

[0018] The present invention is further configured such that: a pull rope is provided below the long support plate, and a magnetic strip is provided at the end of the pull rope away from the long support plate.

[0019] By adopting the above technical solution, fallen rust can be cleaned up, preventing rust from contaminating the fuel in the fuel tank.

[0020] The present invention is further configured such that a connecting pipe is provided between the hydraulic support pipe and the hydraulic pump, and the connecting pipe is spiral in shape.

[0021] By adopting the above technical solution, the connection between the outer frame and the inner frame can be guaranteed, and the movement stroke of the inner frame and the outer frame can be increased while ensuring that the internal pressure of the hydraulic support pipe remains constant.

[0022] The invention is further configured such that: an outer magnetic groove is provided on the outer frame, an outer magnet is disposed in the outer magnetic groove, and rollers and handles are provided on the outer frame.

[0023] By adopting the above technical solution, manual operation can be facilitated.

[0024] In summary, the beneficial technical effects of the present invention are as follows:

[0025] (1) The inner frame of this device can be inserted into the fuel tank when it is in a folded state, and then supported by the hydraulic support pipe. With the help of the magnet on the outer frame, it can be pressed against the top wall of the fuel tank to achieve cleaning and rust removal.

[0026] (2) It can prevent scratches on the inner top and side walls of the fuel tank and can prevent rust from falling off. It can clean up fallen rust and prevent rust from contaminating the fuel in the fuel tank.

[0027] (3) It can ensure the connection between the outer frame and the inner frame, and can increase the movement stroke of the inner and outer frames while ensuring the constant pressure inside the hydraulic support pipe. It can facilitate manual operation. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present invention;

[0029] Figure 2 This is a cross-sectional schematic diagram of an embodiment of the present invention;

[0030] Figure 3 This is a structural schematic diagram of the inner frame and its related structures in one embodiment of the present invention;

[0031] Figure 4 yes Figure 3 Enlarged diagram of A in the middle;

[0032] Figure 5 This is a cross-sectional schematic diagram of a long support plate and its related structures in one embodiment of the present invention;

[0033] Figure 6 This is an exploded structural diagram of the inner frame and its related structures in one embodiment of the present invention.

[0034] Reference numerals: 1. Outer frame; 2. Inner frame; 3. Through hole; 4. Hydraulic pump; 5. Hydraulic support pipe; 6. Steel brush; 7. Outer magnet; 8. Inner magnet; 9. Center plate; 10. Long support plate; 11. Side plate; 12. Fixing ring; 13. Short support plate; 14. Spring; 15. Ball bearing; 16. Pull rope; 17. Magnetic strip; 18. Connecting pipe; 19. Outer magnetic groove; 20. Roller; 21. Handle; 22. Inner magnetic groove; 23. Fuel tank. Detailed Implementation

[0035] The present invention will now be clearly and completely described in conjunction with embodiments.

[0036] See appendix Figure 1-6A rust removal device for the inside of an excavator fuel tank includes an outer frame 1 and an inner frame 2, which are separately arranged. The outer frame 1 has a through hole 3 and a hydraulic pump 4 is installed on it. The inner frame 2 has a hydraulic support pipe 5 connected to the hydraulic pump 4. The inner frame 2 has a folding structure. A steel brush 6 is installed on one side of the inner frame 2. An external magnet 7 is detachably connected to one side of the outer frame 1. An internal magnet 8 is installed on the side of the inner frame 2 where the steel brush 6 is installed. The inner frame 2 includes a center plate 9 and a long support plate 10. The steel brush 6 is installed on both the center plate and the long support plate 10. Side plates 11 are installed on both sides of the steel brush 6 on the center plate and the long support plate 10. A fixing ring 12 is installed on the side of the long support plate 10 away from the steel brush 6. The hydraulic support pipe 5 is installed inside the fixing ring 12. Both long support plates 10 are rotatably connected to short support plates 13 at their ends away from the central plate 9. The short support plate 13 also has the steel brush 6 and side plate 11 on one side, and a fixing ring 12 on the other side. The hydraulic support pipe 5 passes through the fixing ring 12 on the short support plate 13 and is fixedly connected to the short support plate 13 at its end. A connecting pipe 18, which is spiral-shaped, is provided between the hydraulic support pipe 5 and the hydraulic pump 4.

[0037] When using this device, the inner frame 2 is folded and passed through the through hole 3 on the outer frame 1, then through the fuel inlet of the fuel tank 23, and into the fuel tank. It can be held in place by the hydraulic support pipe 5 or directly placed into the fuel tank. Then the hydraulic pump 4 starts working and injects liquid into the hydraulic support pipe 5. As the pressure increases, it gradually deforms, which can open the inner frame 2 inside the fuel tank. At this time, the long support plate 10 and the short support plate 13 together form a door-shaped structure. At this time, the hydraulic support pipe 5 is pulled and its position is adjusted so that the inner magnetic block and the outer magnetic block are on the same vertical plane. At this time, the inner frame 2 will have an upward tendency under the action of magnetic force, and the side plate 11 set on the inner frame 2 can abut against the inner top wall of the fuel tank 23. The steel brush 6 contacts the inner top wall. At this time, simply operate the outer frame 1 to slide back and forth to ensure that the inner frame 2 slides synchronously inside the fuel tank 23. At the same time, the steel brush 6 can complete the rust cleaning work inside the fuel tank.

[0038] Combined with appendix Figure 5 The side plate 11 is slidably connected to the long support plate 10 and the center plate 9. A spring 14 is provided between the side plate 11 and the long support plate 10 and the center plate 9. A ball bearing 15 is provided on one side of the side plate 11. An outer magnetic groove 19 is provided on the outer frame 1, and an outer magnet 7 is disposed within the outer magnetic groove 19. A roller 20 and a handle 21 are provided on the outer frame 1. An inner magnetic groove 22 is provided on the inner frame 2, and an inner magnet 8 is disposed within the inner magnetic groove 22.

[0039] When this device is in use, the elastic setting of the side plate 11 and the ball bearing 15 can reduce the scratches on the inside of the fuel tank 23 caused by the side plate 11. The setting of the inner magnetic groove 22 and the outer magnetic groove 19 can ensure that the device can be installed and disassembled easily. The setting of the handle 21 and the roller 20 can facilitate operation and also avoid the protruding position of the fuel tank 23 inlet, making operation convenient.

[0040] For cleaning by rotation, simply remove the outer frame 1, attach the outer magnet 7 to the outside of the fuel tank 23, and rotate it in a circle. Other cleaning methods are also applicable.

[0041] The working principle of this embodiment is as follows: When using this device, the inner frame 2 is folded and passes through the through hole 3 on the outer frame 1, then through the fuel inlet of the fuel tank 23, and enters the fuel tank. It can be held in place by the hydraulic support pipe 5 or directly placed into the fuel tank. Then the hydraulic pump 4 starts to work and injects liquid into the hydraulic support pipe 5. As the pressure increases, it gradually deforms, which can open the inner frame 2 inside the fuel tank. At this time, the long support plate 10 and the short support plate 13 together form a door-shaped structure. At this time, the hydraulic support pipe 5 is pulled and its position is adjusted so that the inner magnetic block and the outer magnetic block are on the same vertical plane. At this time, the inner frame 2 will have an upward tendency under the action of magnetic force, and the side plate 11 set on the inner frame 2 can abut against the inner top wall of the fuel tank 23. The steel brush 6 contacts the inner top wall. At this time, it is only necessary to operate the outer frame 1 to slide back and forth to ensure that the inner frame 2 slides synchronously inside the fuel tank 23. At the same time, the steel brush 6 can complete the rust cleaning work inside the fuel tank.

[0042] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A device for removing rust from inside a fuel tank of a backhoe, characterized by: The device includes an outer frame (1) and an inner frame (2), which are separately arranged. The outer frame (1) has a through hole (3) and a hydraulic pump (4) is installed on the outer frame (1). The inner frame (2) has a hydraulic support pipe (5) connected to the hydraulic pump (4). The inner frame (2) has a folding structure. A steel brush (6) is installed on one side of the inner frame (2). An external magnet (7) is detachably connected to one side of the outer frame (1). An internal magnet (8) is installed on the side of the steel brush (6) of the inner frame (2). The inner frame (2) includes a center plate (9) and a long support plate (10). The steel brush (6) is provided on both the center plate (9) and the long support plate (10). Side plates (11) are provided on both sides of the steel brush (6) on the center plate (9) and the long support plate (10). A fixing ring (12) is provided on the side of the long support plate (10) away from the steel brush (6). The hydraulic support pipe (5) is located inside the fixing ring (12). Both of the long support plates (10) are rotatably connected to a short support plate (13) at the end away from the center plate (9). The short support plate (13) is also provided with the steel brush (6) and side plate (11) on one side, and a fixing ring (12) on the other side. The hydraulic support pipe (5) passes through the fixing ring (12) provided on the short support plate (13) and is fixedly connected to the short support plate (13) at its end. The side plate (11) is slidably connected to the long support plate (10) and the center plate (9). A spring (14) is provided between the side plate (11) and the long support plate (10) and the center plate (9). A ball bearing (15) is provided on one side of the side plate (11). A pull rope (16) is provided below the long support plate (10), and a magnetic strip (17) is provided at the end of the pull rope (16) away from the long support plate (10).

2. The excavator fuel tank internal rust removal device according to claim 1, characterized by: A connecting pipe (18) is provided between the hydraulic support pipe (5) and the hydraulic pump (4), and the connecting pipe (18) is spiral in shape.

3. The rust removal device for the inside of an excavator fuel tank according to claim 1, characterized in that: The outer frame (1) is provided with an outer magnetic groove (19), and the outer magnet (7) is provided in the outer magnetic groove (19). The outer frame (1) is provided with a roller (20) and a handle (21).

4. The rust removal device for the inside of an excavator fuel tank according to claim 1, characterized in that: The inner frame (2) is provided with an inner magnetic groove (22), and the inner magnet (8) is disposed in the inner magnetic groove (22).

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