Oil tank for diesel generating set

Abstract

The invention discloses an oil tank for a diesel generating set, and particularly relates to the technical field of oil tanks, the oil tank comprises a main oil tank, the top of the main oil tank is connected with a plurality of oil inlet pipes, the top of the main oil tank is provided with a plurality of auxiliary oil tanks corresponding to the oil inlet pipes, and the top of each auxiliary oil tank is provided with an oil inlet and an auxiliary air inlet pipe; an oil feeding pipe connected with the oil inlet pipe is arranged at the bottom of the auxiliary oil tank; by arranging the main oil tank and the auxiliary oil tank, unused diesel oil in the main oil tank can be recycled into the auxiliary oil tank through the recycling mechanism to be stored, the whole is broken up into parts, the auxiliary oil tank can be disassembled at will so that the unused diesel oil can be used to other places, and when the diesel oil is recycled, only the hand wheel needs to be rotated. When the sprayer is adjusted to correspond to the auxiliary fuel tanks at different positions, only the pedal needs to be stepped on and the hand wheel is rotated, overall operation is simple, and diesel oil in the fuel tank is extracted more cleanly and simply compared with a traditional mode that a hose and a siphon principle are used.

Description

Technical Field

[0001] The present invention relates to the field of oil tanks, and in particular to an oil tank for a diesel generator set. Background Art

[0002] The fuel tank of a diesel generator set is generally made of metal steel plates, which includes refueling components, oil outlet components and oil supply components, oil level monitoring components, ventilation components and air pressure regulating components, sewage discharge components and impurity treatment components, etc.

[0003] The fuel tanks of diesel generator sets currently on the market are relatively large. When the unused diesel inside needs to be recovered, a hose must be used in conjunction with the siphon principle to extract the diesel inside the tank. Due to the liquid level difference, only part of the diesel in the upper half of the tank can be absorbed, and it is impossible to completely extract it. In addition, during the process of changing the container, the diesel is prone to spillage and contamination. Summary of the Invention

[0004] The object of the present invention is to provide a fuel tank for a diesel generator set to solve the above-mentioned deficiencies in the technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a fuel tank for a diesel generator set, comprising a main fuel tank, wherein the top of the main fuel tank is connected to an oil inlet pipe, wherein the oil inlet pipes are provided in plurality, and the top of the main fuel tank is provided with a plurality of auxiliary fuel tanks corresponding to the oil inlet pipes, wherein the top of the auxiliary fuel tank is provided with an oil inlet and an auxiliary air inlet pipe, and the bottom of the auxiliary fuel tank is provided with an oil delivery pipe connected to the oil inlet pipe; A component box is fixed to the back of the main oil tank, a fixing frame is fixed to one side of the component box at the back of the auxiliary oil tank, and a recovery mechanism is provided inside the component box for recovering unused diesel in the main oil tank into the auxiliary oil tank.

[0006] Preferably, the top of the main fuel tank is connected to the main air inlet pipe on one side close to the oil inlet pipe, and the side of the main fuel tank is connected to the oil return pipe near its top, and the bottom of the main fuel tank is inclined, wherein a drain pipe is connected to the bottom of the main fuel tank, and the side of the bottom of the main fuel tank away from the drain pipe is connected to the oil outlet pipe.

[0007] Preferably, the top of the main oil tank is located at the four corners of the bottom of the auxiliary oil tank and is fixed with positioning rings, the four corners of the bottom of the auxiliary oil tank are provided with positioning columns matching the positioning rings, the diameter of the oil delivery pipe matches the inner diameter of the oil inlet pipe, and valves are installed on the drain pipe, oil outlet pipe, oil inlet pipe, main air inlet pipe, auxiliary air inlet pipe and oil delivery pipe.

[0008] Preferably, the recovery mechanism includes a piston cylinder fixed inside the component box. A piston is arranged inside the piston cylinder. A piston rod is connected to the top of the piston. A reciprocating motion assembly for controlling the up-and-down reciprocating motion of the piston rod is arranged inside the component box. One side of the bottom of the piston cylinder is connected with an oil suction pipe. The end of the oil suction pipe penetrates through the component box and is communicated with the main fuel tank. An oil inlet check valve is installed on the oil suction pipe. One side of the piston cylinder is connected with an oil injection pipe. An oil outlet check valve is installed on the oil injection pipe; An activable block capable of horizontal movement is arranged inside the fixed frame. An L-shaped conduit is fixed to one side of the activable block. A spray head is installed above the oil inlet on one side of the L-shaped conduit. The end of the oil injection pipe is communicated with the L-shaped conduit through a hose.

[0009] Preferably, a filter cartridge is installed on one side of the component box. Both ends of the filter cartridge are communicated with the hose and the L-shaped conduit respectively. A filter element for filtering diesel is installed inside the filter cartridge.

[0010] Preferably, a guide post is horizontally fixed inside the fixed frame. A lead screw is rotatably connected to one side of the guide post inside the fixed frame through a rotating shaft. The guide post penetrates through the activable block. The lead screw is threadedly connected with the activable block. One end of the lead screw is connected with the reciprocating motion assembly through a transmission assembly.

[0011] Preferably, the reciprocating motion assembly includes a rotating rod. The rotating rod is connected to the component box through a bearing. A cam is installed outside the rotating rod inside the component box. One end of the rotating rod extends to the outside of the component box and a hand wheel is installed; A fixed frame is fixed below the cam inside the component box. A circular hole for the piston rod to pass through is arranged inside the fixed frame. The top end of the piston rod passes through the circular hole and a roller is installed. The roller is located below the cam. A limiting ring is fixed on the outer side of the top of the piston rod. A spring is sleeved between the limiting ring and the fixed frame on the outside of the piston rod.

[0012] Preferably, the transmission assembly includes two support plates. Both support plates are fixed to the inner top of the component box. A main shaft rod is fixed between the two component boxes. Two arc-shaped connecting arms are rotatably connected to the outside of the main shaft rod through bearings. A torsion spring is installed between the support plate and the connecting arm; The two connecting arms are rotatably connected through a bearing with a secondary shaft rod. Two transmission gears are fixed to the outside of the secondary shaft rod; One end of the lead screw extends to the inside of the component box and a driven gear is fixed. One end of the rotating rod relative to the hand wheel is fixed with a driving gear. The two transmission gears are respectively located above one side of the driving gear and the driven gear.

[0013] Preferably, a traction assembly for pulling the connecting arm to rotate around the main spindle is arranged inside the component box; The traction assembly includes a fixed rod fixed to the inner bottom of the component box. A sliding ring that can move up and down and rotate is sleeved on the fixed rod. A pedal is fixed to one side of the sliding ring. A pull rope is connected between the pedal and the auxiliary spindle. A guide pipe is fixed to the inner wall of the component box below one side of the connecting arm. The pull rope passes through the guide pipe. An L-shaped card slot for the movement of the pedal is formed in the outer wall of the component box.

[0014] Preferably, a three-way valve is installed on the fuel injection pipe on one side of the oil outlet check valve. The third end of the three-way valve is communicated with the main fuel tank through a pipeline. A fixing plate is fixed to the valve rod of the three-way valve. A slide rail is fixed to the top of the fixing plate. A sleeve is fixed to the bottom of the fixing plate. The pull rope passes through the sleeve. A slider is slidably connected inside the slide rail. The top of the slider is connected with a tension spring through a rotating seat. The end of the tension spring is connected to the inner wall of the component box through a rotating seat.

[0015] In the above technical solution, the technical effects and advantages provided by the present invention are as follows: By providing the main fuel tank and the auxiliary fuel tank, the unused diesel oil in the main fuel tank can be recovered into the auxiliary fuel tank for storage through the recovery mechanism, achieving the purpose of breaking up the whole into parts. And the auxiliary fuel tank can be disassembled at will so that the unused diesel oil can be used elsewhere. When recovering the diesel oil, only need to rotate the handwheel. When adjusting the nozzle to correspond to different positions of the auxiliary fuel tank, only need to step on the pedal and rotate the handwheel. The overall operation is simple, and it is cleaner and simpler compared with the traditional method of using a hose and the siphon principle to extract diesel oil from the fuel tank. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

[0017] Figure 1 One of the external views of the present invention; Figure 2 Another external view of the present invention; Figure 3 The structural schematic diagram of the top of the main fuel tank of the present invention; Figure 4 The structural schematic diagram of the auxiliary fuel tank of the present invention; Figure 5 The overall cross-sectional view of the fixed frame and the component box of the present invention; Figure 6 The internal structural schematic diagram of the fixed frame of the present invention; Figure 7 Schematic diagram of the internal structure of the component box of the present invention; Figure 8 Schematic diagram of the structure of the reciprocating motion component of the present invention; Figure 9 Schematic diagram of the structure of the pull rope layout of the present invention; Figure 10 Schematic diagram of the structure of the connecting arm of the present invention; Figure 11 Schematic diagram of the structure of the slide rail of the present invention.

[0018] Explanation of reference numerals: 1, main fuel tank; 2, sewage pipe; 3, oil outlet pipe; 4, oil return pipe; 5, oil inlet pipe; 6, main air inlet pipe; 7, auxiliary fuel tank; 8, oil inlet; 9, auxiliary air inlet pipe; 10, oil delivery pipe; 11, component box; 12, L-shaped conduit; 13, nozzle; 14, pedal; 15, L-shaped card slot; 16, filter cartridge; 17, fixed frame; 18, handwheel; 19, positioning ring; 20, positioning column; 21, movable block; 22, guide post; 23, lead screw; 24, main spindle rod; 25, rotating rod; 26, cam; 27, fixed bracket; 28, piston rod; 29, piston cylinder; 30, oil suction pipe; 31, oil spray pipe; 32, driving gear; 33, driven gear; 34, connecting arm; 35, auxiliary spindle rod; 36, transmission gear; 37, spring; 38, limit ring; 39, roller; 40, tension spring; 41, three-way valve; 42, fixing plate; 43, sleeve; 44, slide rail; 45, slider; 46, fixed rod; 47, torsion spring; 48, pull rope; 49, oil outlet one-way valve; 50, oil inlet one-way valve; 51, guiding pipe; 52, support plate. Detailed implementation manners

[0019] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further introduced in detail below in conjunction with the accompanying drawings.

[0020] The present invention provides a fuel tank for a diesel generator set as shown in Figures 1-11 Figure, which includes a main fuel tank 1. An oil inlet pipe 5 is connected to the top of the main fuel tank 1. There are several oil inlet pipes 5. Auxiliary fuel tanks 7 corresponding to the several oil inlet pipes 5 are arranged at the top of the main fuel tank 1. An oil inlet 8 and an auxiliary air inlet pipe 9 are arranged at the top of the auxiliary fuel tank 7. And an oil delivery pipe 10 connected to the oil inlet pipe 5 is arranged at the bottom of the auxiliary fuel tank 7; A component box 11 is fixed to the back of the main fuel tank 1. A fixed frame 17 is fixed to the back of one side of the component box 11 and located at the back of the auxiliary fuel tank 7. A recovery mechanism for recycling the unused diesel in the main fuel tank 1 back into the auxiliary fuel tank 7 is arranged inside the component box 11.

[0021] Further, one side of the top of the main fuel tank 1 close to the fuel inlet pipe 5 is connected with a main air inlet pipe 6, and one side of the main fuel tank 1 close to its top is connected with a return oil pipe 4, and the bottom of the main fuel tank 1 is inclined. Among them, a sewage discharge pipe 2 is connected to the bottommost position of the main fuel tank 1, and an oil outlet pipe 3 is connected to one side of the bottom of the main fuel tank 1 away from the sewage discharge pipe 2. Through the main fuel tank 1 with an inclined bottom, the dirt at the bottom of the main fuel tank 1 can be discharged from the sewage discharge pipe 2.

[0022] Further, positioning rings 19 are fixed at the four corners of the bottom of the main fuel tank 1 where the top of the auxiliary fuel tank 7 is located. Positioning columns 20 matching the positioning rings 19 are provided at the four corners of the bottom of the auxiliary fuel tank 7. The diameter of the fuel delivery pipe 10 matches the inner diameter of the fuel inlet pipe 5. Valves are installed on the sewage discharge pipe 2, the oil outlet pipe 3, the fuel inlet pipe 5, the main air inlet pipe 6, the auxiliary air inlet pipe 9, and the fuel delivery pipe 10. The opening and closing states of each "oil pipe" can be controlled through the valves. The positioning columns 20 and the positioning rings 19 can stably hold the auxiliary fuel tank 7 on the top of the main fuel tank 1 and ensure that the fuel delivery pipe 10 can be accurately docked with the fuel inlet pipe 5 (through the fuel delivery pipe 10 and the fuel inlet pipe 5, the diesel oil inside the auxiliary fuel tank 7 can be quickly introduced into the main fuel tank 1, and the main air inlet pipe 6 and the auxiliary air inlet pipe 9 can balance the air pressure inside the main fuel tank 1 and the auxiliary fuel tank 7 to improve the stability when the diesel generator set uses oil).

[0023] During the use of the diesel generator, the oil outlet pipe 3 and the return oil pipe 4 are connected to the fuel inlet passage and the return oil passage of the diesel generator through pipes, and then diesel oil is poured into the main fuel tank 1 for the diesel generator to perform power generation operations (a fuel filling port is provided on the main fuel tank 1, and the position of the fuel filling port can be referred to Figure 1 , and its position is located between the main air inlet pipe 6 and the component box 11. As for the liquid level display of the diesel oil, an observation window can be set on the main fuel tank 1. The above are all the designs of the fuel tank of the conventional diesel generator set and will not be elaborated here).

[0024] Refer to Figures 4-11 , the recovery mechanism includes a piston cylinder 29 fixed inside the component box 11. A piston is arranged inside the piston cylinder 29. A piston rod 28 is connected to the top of the piston. A reciprocating motion assembly for controlling the up and down reciprocating motion of the piston rod 28 is arranged inside the component box 11. One side of the bottom of the piston cylinder 29 is connected with an oil suction pipe 30. The end of the oil suction pipe 30 penetrates through the component box 11 and is connected to the main fuel tank 1. An oil inlet check valve 50 is installed on the oil suction pipe 30. One side of the piston cylinder 29 is connected with an oil spray pipe 31. An oil outlet check valve 49 is installed on the oil spray pipe 31; An movable block 21 that can move horizontally is arranged inside the fixed frame 17. An L-shaped conduit 12 is fixed to one side of the movable block 21. A spray head 13 is installed above the oil inlet 8 on one side of the L-shaped conduit 12. The end of the oil spray pipe 31 is connected to the L-shaped conduit 12 through a hose.

[0025] Further, a filter cartridge 16 is installed on one side of the component box 11. The two ends of the filter cartridge 16 are respectively connected to a hose and an L-shaped conduit 12, and a filter element for filtering diesel is installed inside the filter cartridge 16.

[0026] Further, a guide post 22 is horizontally fixed inside the fixed frame 17, and a lead screw 23 is rotatably connected to one side of the guide post 22 inside the fixed frame 17 through a rotating shaft. The guide post 22 penetrates through the movable block 21, and the lead screw 23 is threadedly connected to the movable block 21. One end of the lead screw 23 is connected to a reciprocating motion assembly through a transmission assembly.

[0027] When the diesel in the diesel engine unit is not completely used up and needs to be recycled, the hand wheel 18 is driven to rotate the rotating rod 25, which in turn drives the cam 26 to rotate. Cooperating with the spring 37 and the limit ring 38, the piston rod 28 can move up and down reciprocally during the rotation of the cam 26. The roller 39 can be used to reduce the wear of the cam 26 on the piston rod 28; When the piston rod 28 moves upward, the piston inside the piston cylinder 29 will also move upward synchronously with the piston rod 28. When the piston moves upward inside the piston cylinder 29, it will suck the diesel in the main fuel tank 1 into the inside of the piston cylinder 29 through the oil suction pipe 30 (due to the existence of the inlet check valve 50, the diesel entering the inside of the piston cylinder 29 cannot return to the main fuel tank 1 through the oil suction pipe 30 again); When the piston rod 28 moves downward, the piston inside the piston cylinder 29 will also move downward synchronously with the piston rod 28. When the piston moves downward inside the piston cylinder 29, it will force the diesel remaining inside the piston cylinder 29 into the fuel injection pipe 31 (due to the action of the outlet check valve 49, the diesel entering the inside of the fuel injection pipe 31 cannot flow back into the inside of the piston cylinder 29); In such a reciprocating cycle, the remaining diesel in the main fuel tank 1 can be continuously pumped to the fuel injection pipe 31 to achieve the diesel recovery operation. Since the fuel injection pipe 31 is connected to the L-shaped conduit 12, the diesel will be sprayed out through the nozzle 13 and enter the auxiliary fuel tank 7 from the oil inlet 8, thereby completing the diesel recovery process (during the recovery process, the valve on the fuel inlet pipe 5 needs to be closed to ensure the stable storage of the diesel in the auxiliary fuel tank 7, and when the diesel passes through the fuel injection pipe 31, it will be filtered by the filter element inside the filter cartridge 16, thereby improving the cleanliness of the diesel during recovery).

[0028] Refer to Figures 7-11 As shown in the figure, the reciprocating motion assembly includes a rotating rod 25. The rotating rod 25 is connected to the component box 11 through a bearing. A cam 26 is installed inside the component box 11 on the outside of the rotating rod 25. One end of the rotating rod 25 extends to the outside of the component box 11 and is equipped with a hand wheel 18; Inside the component box 11, a fixing bracket 27 is fixed below the cam 26. A circular hole for the piston rod 28 to pass through is provided inside the fixing bracket 27. The top end of the piston rod 28 passes through the circular hole and is equipped with a roller 39. The roller 39 is located below the cam 26. A limiting ring 38 is fixed on the outer side of the top of the piston rod 28, and a spring 37 is sleeved on the outer part of the piston rod 28 between the limiting ring 38 and the fixing bracket 27.

[0029] Further, the transmission assembly includes two support plates 52. Both support plates 52 are fixed to the inner top of the component box 11. A main shaft rod 24 is fixed between the two component boxes 11. Two arc-shaped connecting arms 34 are rotatably connected to the outer part of the main shaft rod 24 through bearings. A torsion spring 47 is installed between the support plate 52 and the connecting arm 34; The two connecting arms 34 are rotatably connected to each other through a bearing on a secondary shaft rod 35. Two transmission gears 36 are fixed to the outer part of the secondary shaft rod 35; One end of the lead screw 23 extends into the component box 11 and is fixed with a driven gear 33. One end of the rotating rod 25 relative to the handwheel 18 is fixed with a driving gear 32. The two transmission gears 36 are respectively located above one side of the driving gear 32 and the driven gear 33.

[0030] Specifically, a traction assembly for pulling the connecting arm 34 to rotate around the main shaft rod 24 is provided inside the component box 11; The traction assembly includes a fixed rod 46. The fixed rod 46 is fixed to the inner bottom of the component box 11. A sliding ring that can move up and down and rotate is sleeved on the fixed rod 46. One side of the sliding ring is fixed with a pedal 14. A pull rope 48 is connected between the pedal 14 and the secondary shaft rod 35. A guide pipe 51 is fixed to the inner wall of the component box 11 below one side of the connecting arm 34. The pull rope 48 passes through the guide pipe 51. An L-shaped slot 15 for the movement of the pedal 14 is opened on the outer wall of the component box 11.

[0031] Specifically, a three-way valve 41 is installed on the fuel injection pipe 31 on one side of the oil outlet check valve 49. The third end of the three-way valve 41 is connected to the main fuel tank 1 through a pipe. A fixing plate 42 is fixed to the valve stem of the three-way valve 41. A slide rail 44 is fixed to the top of the fixing plate 42. A sleeve 43 is fixed to the bottom of the fixing plate 42. The pull rope 48 passes through the sleeve 43. A slider 45 is slidably connected inside the slide rail 44. The top of the slider 45 is connected to a tension spring 40 through a rotating seat. The end of the tension spring 40 is connected to the inner wall of the component box 11 through a rotating seat.

[0032] When there is a large amount of remaining diesel in the main fuel tank 1 and it needs to be recovered, several auxiliary fuel tanks 7 can be placed on the top of the main fuel tank 1 at the same time. When one of the auxiliary fuel tanks 7 is filled with diesel, the staff can directly step on the pedal 14 downward and rotate the pedal 14 to the "horizontal section" of the L-shaped slot 15 at the bottommost end of the L-shaped slot 15; Then rotate the handwheel 18; When the pedal 14 is stepped to the bottom end of the L-shaped card slot 15, the pull rope 48 will pull the secondary shaft rod 35 (a bearing is provided between the pull rope 48 and the secondary shaft rod 35, the pull rope 48 is connected to the outer ring of the bearing, and the inner ring of the bearing is fixed to the secondary shaft rod 35 to prevent the secondary shaft rod 35 from winding the pull rope 48). Then, the secondary shaft rod 35 will drive the connecting arm 34 to rotate around the main shaft rod 24, so that the two transmission gears 36 are respectively engaged with the driving gear 32 and the driven gear 33, so that the subsequent rotating rod 25 can drive the lead screw 23 to rotate; At the same time, the pull rope 48 will also cooperate with the sleeve 43 to drive the fixed plate 42 to rotate 90 degrees, so as to change the state of the three-way valve 41, so that the oil sprayed from the piston cylinder 29 through the oil outlet one-way valve 49 can return to the main fuel tank 1 again; During the rotation of the handwheel 18, the lead screw 23 will also rotate synchronously. Cooperating with the guide post 22, the movable block 21 and the L-shaped conduit 12 can be adjusted to move as a whole, so that the nozzle 13 can perform "diesel recovery operation" on different auxiliary fuel tanks 7. Due to the existence of the three-way valve 41, there is no need to worry about "accidental leakage" of diesel during the movement of the nozzle 13; When the nozzle 13 moves back above another auxiliary fuel tank 7, the pedal 14 can be pushed out from the horizontal section of the L-shaped card slot 15. Under the action of the torsion spring 47, the connecting arm 34 can be reset, so that the two transmission gears 36 are separated from the driving gear 32 and the driven gear 33, thereby locking the position of the nozzle 13 to improve the stability of the subsequent diesel recovery operation. At the same time, under the action of the tension spring 40, the slider 45 can be reset, and then the fixed plate 42 can be rotated 90 degrees in the original direction to reset (since the valve stem of the three-way valve 41 is fixed to the fixed plate 42, therefore, only by controlling the rotation angle of the fixed plate 42 can the passage state of the three-way valve 41 be controlled), ensuring that the fuel injection pipe 31 can receive the diesel sprayed from the piston cylinder 29 again, so as to perform the diesel recovery operation on another auxiliary fuel tank 7.

[0033] Only some exemplary embodiments of the present invention have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A fuel tank for a diesel generator set, comprising a main fuel tank (1), wherein an oil inlet pipe (5) is connected to the top of the main fuel tank (1), and it is characterized in that: A plurality of the oil inlet pipes (5) are provided, and a plurality of auxiliary fuel tanks (7) corresponding to the oil inlet pipes (5) are arranged on the top of the main fuel tank (1). An oil inlet (8) and an auxiliary air inlet pipe (9) are arranged on the top of the auxiliary fuel tank (7), and an oil delivery pipe (10) connected to the oil inlet pipe (5) is arranged at the bottom of the auxiliary fuel tank (7); An element box (11) is fixed to the back of the main fuel tank (1), and a fixing frame (17) is fixed to the back of one side of the element box (11) where the auxiliary fuel tank (7) is located. A recovery mechanism for recovering the unused diesel in the main fuel tank (1) back into the auxiliary fuel tank (7) is arranged inside the element box (11).

2. The fuel tank for a diesel generator set according to claim 1, characterized in that: A main air inlet pipe (6) is connected to one side of the top of the main fuel tank (1) close to the oil inlet pipe (5), a return oil pipe (4) is connected to a position close to the top of one side of the main fuel tank (1), and the bottom of the main fuel tank (1) is inclined. Among them, a sewage discharge pipe (2) is connected to the bottommost position of the main fuel tank (1), and an oil outlet pipe (3) is connected to one side of the bottom of the main fuel tank (1) far from the sewage discharge pipe (2).

3. The fuel tank for a diesel generator set according to claim 2, wherein: Positioning rings (19) are fixed at the four corners of the bottom of the main fuel tank (1) where the bottom of the auxiliary fuel tank (7) is located. Positioning columns (20) matching the positioning rings (19) are arranged at the four corners of the bottom of the auxiliary fuel tank (7). The diameter of the oil delivery pipe (10) matches the inner diameter of the oil inlet pipe (5). Valves are installed on the sewage discharge pipe (2), the oil outlet pipe (3), the oil inlet pipe (5), the main air inlet pipe (6), the auxiliary air inlet pipe (9), and the oil delivery pipe (10).

4. A fuel tank for a diesel generator set according to claim 1, characterized in that: The recovery mechanism includes a piston cylinder (29) fixed inside the element box (11). A piston is arranged inside the piston cylinder (29). A piston rod (28) is connected to the top of the piston. A reciprocating motion assembly for controlling the up-and-down reciprocating motion of the piston rod (28) is arranged inside the element box (11). One side of the bottom of the piston cylinder (29) is connected with an oil suction pipe (30). The end of the oil suction pipe (30) penetrates through the element box (11) and is communicated with the main fuel tank (1). An oil inlet one-way valve (50) is installed on the oil suction pipe (30). One side of the piston cylinder (29) is connected with an oil injection pipe (31). An oil outlet one-way valve (49) is installed on the oil injection pipe (31); An movable block (21) capable of horizontal movement is arranged inside the fixing frame (17). An L-shaped conduit (12) is fixed to one side of the movable block (21). A spray head (13) is installed above the oil inlet (8) on one side of the L-shaped conduit (12). The end of the oil injection pipe (31) is communicated with the L-shaped conduit (12) through a hose.

5. A fuel tank for a diesel generator set according to claim 4, characterized in that: A filter cartridge (16) is installed on one side of the element box (11). The two ends of the filter cartridge (16) are respectively communicated with the hose and the L-shaped conduit (12), and a filter element for filtering diesel is installed inside the filter cartridge (16).

6. A fuel tank for a diesel generator set according to claim 4, characterized in that: Inside the fixed frame (17), a guide post (22) is horizontally fixed, and inside the fixed frame (17), a lead screw (23) is rotatably connected by a rotating shaft on one side of the guide post (22). The guide post (22) passes through the movable block (21), and the lead screw (23) is threadedly connected to the movable block (21). One end of the lead screw (23) is connected to a reciprocating motion assembly through a transmission assembly.

7. The fuel tank for a diesel generator set according to claim 6, wherein: The reciprocating motion assembly includes a rotating rod (25). The rotating rod (25) is connected in the component box (11) through a bearing. A cam (26) is installed inside the component box (11) on the outside of the rotating rod (25). One end of the rotating rod (25) extends outside the component box (11) and a handwheel (18) is installed. Inside the component box (11), a fixed frame (27) is fixed below the cam (26). A round hole for the piston rod (28) to pass through is provided inside the fixed frame (27). The top end of the piston rod (28) passes through the round hole and a roller (39) is installed. The roller (39) is located below the cam (26). A limit ring (38) is fixed on the outer side of the top of the piston rod (28), and a spring (37) is sleeved between the limit ring (38) and the fixed frame (27) on the outside of the piston rod (28).

8. A fuel tank for a diesel generator set according to claim 7, characterized in that: The transmission assembly includes two support plates (52). Both of the two support plates (52) are fixed on the inner top of the component box (11), and a main shaft rod (24) is fixed between the two component boxes (11). Two arc-shaped connecting arms (34) are rotatably connected to the outside of the main shaft rod (24) through bearings. A torsion spring (47) is installed between the support plate (52) and the connecting arm (34). A secondary shaft rod (35) is rotatably connected between the two connecting arms (34) through a bearing. Two transmission gears (36) are fixed on the outside of the secondary shaft rod (35). One end of the lead screw (23) extends into the component box (11) and a driven gear (33) is fixed. One end of the rotating rod (25) relative to the handwheel (18) is fixed with a driving gear (32). The two transmission gears (36) are respectively located above one side of the driving gear (32) and the driven gear (33).

9. The fuel tank for a diesel generator set according to claim 8, characterized in that: Inside the component box (11), a traction assembly is provided for pulling the connecting arm (34) to rotate around the main shaft rod (24). The traction assembly includes a fixed rod (46). The fixed rod (46) is fixed on the inner bottom of the component box (11). The fixed rod (46) is sleeved with a sliding ring that can move up and down and rotate. One side of the sliding ring is fixed with a pedal (14). A pull rope (48) is connected between the pedal (14) and the secondary shaft rod (35). A guide tube (51) is fixed on the inner wall of the component box (11) below one side of the connecting arm (34). The pull rope (48) passes through the guide tube (51). An L-shaped card slot (15) for the movement of the pedal (14) is provided on the outer wall of the component box (11).

10. A fuel tank for a diesel generator set according to claim 9, characterized in that: A three-way valve (41) is installed on one side of the fuel injection pipe (31) where the one-way oil outlet valve (49) is located. The third end of the three-way valve (41) is communicated with the main fuel tank (1) through a pipeline. A fixing plate (42) is fixed on the valve stem of the three-way valve (41). A slide rail (44) is fixed on the top of the fixing plate (42). A sleeve (43) is fixed on the bottom of the fixing plate (42). A pull rope (48) passes through the sleeve (43). A slider (45) is slidably connected inside the slide rail (44). The top of the slider (45) is connected with a tension spring (40) through a rotating seat. The end of the tension spring (40) is connected to the inner wall of the component box (11) through a rotating seat.

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