Self-sealing oil gun capable of returning oil and preventing leakage

Abstract

The invention provides a self-sealing oil gun capable of returning oil and preventing leakage, and relates to the technical field of self-sealing oil guns, the self-sealing oil gun comprises a connecting mechanism, the connecting mechanism comprises a fixing cylinder, the fixing cylinder is fixedly communicated with one side of an oil gun body, and adjusting grooves are formed in the two ends of the arc surface of the fixing cylinder; the two sides of the inner wall of the adjusting groove are rotatably connected with the same rotating rod, the arc surface of the rotating rod is fixedly connected with an adjusting block, one side of the adjusting block is provided with a connecting groove, the inner wall of the connecting groove is slidably connected with a sliding block, and one side of the inner wall of the connecting groove is rotatably connected with an adjusting rod; and the arc surface of the adjusting rod is in threaded connection with the inner wall of the sliding block. According to the oil gun, when the oil gun is used for a long time and the gun head of the oil gun is blocked by dust, the oil gun can be rapidly detached from the oil pipe through the connecting mechanism, the efficiency of detaching the oil gun can be improved through the connecting mechanism, workers can dredge the oil gun more conveniently, and the use stability of the oil gun is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of self-sealing fuel dispensers, and particularly to a self-sealing fuel dispenser that can return oil and prevent leakage. Background Art

[0002] A self-sealing fuel dispenser is a fueling device designed to improve fueling safety. Its main feature is that during the fueling process, once the fuel dispenser is disconnected from the fuel tank, the fuel flow port automatically closes to prevent fuel leakage or external contaminants from entering the fuel pipe.

[0003] The invention with the publication number CN207973503U discloses a self-sealing fuel dispenser that can return oil and prevent leakage. The key points of its technical solution are as follows: It includes a gun body and a barrel. A return valve assembly is provided at the front end of the gun body near the barrel. The return valve assembly includes a return valve seat arranged in the gun body and a return valve. The return valve is arranged between the gun body and the return valve seat, and a spring is arranged between the return valve and the gun body. The spring abuts the return valve against the return valve seat. A ventilation hole runs through the middle of the return valve. A ventilation groove is provided at the end of the return valve near the return valve seat. A seal is arranged in the ventilation groove, and a retaining ring is fixed at the end of the ventilation groove. For the self-sealing fuel dispenser of the present utility model, by running a ventilation hole through the middle of the return valve and arranging a ventilation groove at the end of the return valve, during oil return, external air is successively inhaled through the ventilation hole and the ventilation groove, thereby realizing the oil return operation; while during fueling, the seal is used to seal the ventilation groove, thus avoiding oil leakage.

[0004] Regarding the above related content, there are the following technical defects: Through the anti-backflow module and the anti-leakage module, the fuel dispenser has a self-sealing function. The fuel dispenser can prevent fuel from leaking during the fueling process and has an oil return function to ensure that the fuel can smoothly flow back to the oil tank or storage container, avoiding waste and environmental pollution. However, when the fuel dispenser is used for a long time, a large amount of dust will adhere to the nozzle of the fuel dispenser, and the dust will cause the fuel dispenser to become blocked. The fueling efficiency of the blocked fuel dispenser will decrease. The fuel dispenser and the fuel pipe are connected by bolts, and the speed of disassembling the fuel dispenser from the fuel pipe is slow, which will affect the efficiency of dredging the nozzle of the fuel dispenser.

[0005] Therefore, it is necessary to provide a new self-sealing fuel dispenser that can return oil and prevent leakage to solve the above technical problems. Summary of the Invention

[0006] The purpose of the present invention is to solve the deficiencies existing in the prior art and propose a self-sealing fuel dispenser that can return oil and prevent leakage.

[0007] To achieve the above object, the present invention adopts the following technical solutions: It includes a fuel tank, a fuel pipe, a fuel gun body, a replacement mechanism, a connection mechanism, an anti-backflow module, and an anti-leakage module. One end of the fuel pipe is fixedly communicated with the fuel tank. The anti-backflow module is arranged inside the fuel tank, and the position of the anti-backflow module corresponds to the position of the fuel pipe. The anti-backflow module includes a flow sensor, a pressure sensor, and an automatic valve. The anti-leakage module is arranged at the oil outlet of the fuel gun body. The anti-leakage module includes a leakage sensor, an anti-leakage valve, and a temperature and humidity sensor. A connection mechanism is arranged on one side of the fuel pipe close to the fuel gun body. The connection mechanism includes a fixed cylinder. The fixed cylinder is fixedly communicated with one side of the fuel gun body. Adjustment grooves are opened at both ends of the arc surface of the fixed cylinder. The two sides of the inner wall of the adjustment groove are rotatably connected to the same rotating rod. An adjustment block is fixedly connected to the arc surface of the rotating rod. A connection groove is opened on one side of the adjustment block. A slider is slidably connected to the inner wall of the connection groove. An adjustment rod is rotatably connected to one side of the inner wall of the connection groove. The arc surface of the adjustment rod is threadedly connected to the inner wall of the slider. A rotating block is fixedly connected to one end of the arc surface of the adjustment rod away from the connection groove. A connection cylinder is fixedly communicated with the side of the fixed cylinder away from the fuel gun body. A sealing ring is fixedly connected to the arc surface of the connection cylinder. The arc surface of the sealing ring is slidably connected to a connection cylinder. A limiting block is fixedly connected to one side of the slider close to the connection cylinder. The two limiting blocks are respectively slidably connected to the inner wall of the connection cylinder. The side of the connection cylinder away from the connection cylinder is fixedly communicated with the fuel pipe.

[0008] With the above technical solution, it is achieved that an anti-backflow module is installed on the fuel tank. The anti-backflow module consists of a flow sensor, a pressure sensor, and an automatic valve. The flow sensor can monitor the oil flow situation in real time, detect whether there are signs of reverse oil flow. Once the flow direction changes, the control system can interrupt the oil flow in time to prevent backflow; the pressure sensor can monitor the pressure at the oil outlet of the fuel dispenser nozzle in real time. If abnormal pressure is found, the fuel dispenser nozzle can be closed through the control system or other emergency measures can be taken. The automatic valve sensor monitors the direction and pressure of the oil flow, and the valve automatically closes during backflow. An anti-leakage module is installed inside the fuel dispenser nozzle body. The anti-leakage module consists of a leakage sensor, an anti-leakage valve, and a temperature and humidity sensor. The leakage sensor can sense whether the oil product leaks. Once leakage is detected, an alarm is immediately issued and the oil flow is cut off; the anti-leakage valve automatically cuts off the oil flow when the fuel dispenser nozzle body is detached from the fuel nozzle seat to prevent oil leakage; the temperature and humidity sensor can monitor environmental changes by combining the temperature and humidity sensors to avoid oil product leakage or volatilization during the refueling process due to changes in the external environment. Through the anti-backflow module and the anti-leakage module, the fuel dispenser nozzle body has a self-sealing function. The fuel dispenser nozzle body can prevent the oil product from leaking during the refueling process and has a backflow function to ensure that the oil product can smoothly flow back to the oil tank or storage container, avoiding waste and environmental pollution. However, when the fuel dispenser nozzle body is used for a long time, a large amount of dust will adhere to the nozzle of the fuel dispenser nozzle body, and the dust will cause blockage of the fuel dispenser nozzle body. The refueling efficiency of the blocked fuel dispenser nozzle body will be reduced. The fuel dispenser nozzle body and the oil pipe are connected by bolts, and the speed of detaching the fuel dispenser nozzle body from the oil pipe is slow, which will affect the efficiency of dredging the nozzle of the fuel dispenser nozzle body. At this time, through the connecting mechanism, the fuel dispenser nozzle body can be quickly detached from the oil pipe, thereby improving the efficiency of the worker in dredging the fuel dispenser nozzle.

[0009] Preferably, a force - adding rod slidably penetrates through the inner wall of the rotating block, and the cross - section of the force - adding rod is circular.

[0010] With this preferred solution, it is achieved that the force - adding rod can slide within the rotating block to increase the rotation speed of the rotating block.

[0011] Preferably, an anti - slip sleeve is fixedly connected to the arc surface of the force - adding rod, and anti - slip lines are provided on the arc surface of the anti - slip sleeve.

[0012] With the above technical solution, it is achieved that the protective sleeve can increase the friction force on the surface of the force - adding rod.

[0013] Preferably, coil springs are slidably connected to both ends of the arc surface of the rotating rod, and the two ends of the coil springs are respectively fixedly connected to the adjusting block and the side wall of the adjusting groove.

[0014] With the above technical solution, it is achieved that the coil springs can quickly drive the adjusting block to reset, improving the efficiency of replacing the fuel dispenser nozzle body.

[0015] Preferably, a protective ring is fixedly connected to one side of the connecting cylinder close to the fixed cylinder, and the cross-section of the protective ring is circular.

[0016] With the above technical solution, it is achieved that the protective ring can prevent the connecting cylinder and the fixed cylinder from coming into direct contact, avoiding abutment damage between the two.

[0017] Preferably, a cleaning mechanism is provided on one side of the fuel tank close to the fuel gun body. The cleaning mechanism includes a fixing plate fixedly connected to one side of the fuel tank. A motor is fixedly connected to one side of the fixing plate. The output end of the motor is fixedly connected to a connecting rod. A connecting frame is provided on one side of the fixing plate close to the connecting rod. One side of the connecting frame is fixedly connected to the fuel tank. A driving block is slidably connected to the inner wall of the connecting frame. The inner wall of the driving block is in threaded connection with the arc surface of the connecting rod. Two limiting plates are fixedly connected to the side of the driving block away from the fuel tank. The limiting plates are elastic plates. Cleaning plates are fixedly connected to both sides of the connecting frame by means of a replacement mechanism.

[0018] With the above technical solution, when the fuel gun body is in use, it will cause the fuel pipe to come into contact with the ground, and the dust on the ground will adhere to the surface of the fuel pipe. After a long time, a large amount of dust will accumulate on the surface of the fuel pipe. When the worker uses the fuel gun body, the dust on the fuel pipe will adhere to the worker's clothes, which will affect the use effect of the fuel pipe and the aesthetics of the fuel pipe surface. At this time, the cleaning mechanism can be used to clean the surface of the fuel pipe, so as to improve the cleanliness of the fuel pipe surface through the cleaning mechanism.

[0019] Preferably, a connecting ring is fixedly connected to one end of the arc surface of the connecting rod away from the motor.

[0020] With the above technical solution, it is achieved that the connecting ring can protect the contact position between the connecting rod and the driving block.

[0021] Preferably, replacement mechanisms are provided on both sides of the connecting frame. The replacement mechanism includes a mounting plate. One side of the mounting plate is fixedly connected to the cleaning plate. Two special-shaped grooves are opened at one end of the mounting plate. Assembly rods are slidably connected to the inner walls of the special-shaped grooves. The four assembly rods are respectively fixedly connected to both sides of the connecting frame. A rotating ring is in threaded connection with the arc surface of the assembly rod.

[0022] With the above technical solution, when the cleaning plate is worn after long-term use, the worn cleaning plate can be replaced through the replacement mechanism. Thus, by replacing the new cleaning plate, the use effect of the cleaning plate can be improved and the cleaning efficiency can be increased.

[0023] Preferably, a plurality of friction blocks are fixedly connected to one side of the rotating ring close to the mounting plate, and the plurality of friction blocks are evenly distributed on the rotating ring.

[0024] With the above technical solution, the friction block can increase the frictional force between the rotating ring and the connecting frame.

[0025] Preferably, a convex block is fixedly connected to one end of the arc surface of the assembly rod, and the cross section of the convex block is in a funnel shape.

[0026] With the above technical solution, the convex block can increase the connection speed between the rotating ring and the arc surface of the assembly rod.

[0027] Compared with the prior art, the advantages and positive effects of the present invention are as follows: 1. In the present invention, by providing a connection mechanism, when the nozzle of the fuel dispenser is blocked by dust after long-term use, the fuel dispenser can be quickly disassembled from the fuel pipe through the connection mechanism. Through the connection mechanism, the disassembly efficiency of the fuel dispenser can be improved, making it more convenient for workers to dredge the fuel dispenser and improving the use stability of the fuel dispenser.

[0028] 2. In the present invention, by providing a cleaning mechanism, when the fuel pipe contacts the ground, a large amount of dust will adhere to the surface of the fuel pipe. At this time, the dust on the surface of the fuel pipe can be cleaned through the cleaning mechanism. Thus, through the cleaning mechanism, the cleanliness of the surface of the fuel pipe can be improved, and the subsequent use effect of the fuel pipe can be improved.

[0029] 3. In the present invention, by providing a replacement mechanism, when the brush on the surface of the cleaning plate affects the cleaning effect due to wear after long-term use, the cleaning plate can be replaced through the replacement mechanism. Through the replacement mechanism, the use stability of the cleaning plate can be improved, and the cleaning efficiency can be improved. Brief Description of the Drawings

[0030] Figure 1 is a three-dimensional structural schematic diagram of a self-sealing fuel dispenser capable of oil return and leakage prevention proposed by the present invention; Figure 2 is a structural schematic diagram of a connection mechanism of a self-sealing fuel dispenser capable of oil return and leakage prevention proposed by the present invention; Figure 3 is a split schematic diagram of a connection mechanism of a self-sealing fuel dispenser capable of oil return and leakage prevention proposed by the present invention; Figure 4 is Figure 3 an enlarged view of part A of Figure 5 is Figure 3 an enlarged view of part B of Figure 6 is a structural schematic diagram of a cleaning mechanism of a self-sealing fuel dispenser capable of oil return and leakage prevention proposed by the present invention; Figure 7 is a partially enlarged structural schematic diagram of a cleaning mechanism of a self-sealing fuel dispenser capable of oil return and leakage prevention proposed by the present invention; Figure 8 This is a schematic structural diagram of a replacement mechanism for a self-sealing fuel gun that can return oil and prevent leakage proposed by the present invention; Figure 9 This is a partially disassembled structural diagram of a replacement mechanism for a self-sealing fuel gun that can return oil and prevent leakage proposed by the present invention; Figure 10 This is a flowchart of a self-sealing fuel gun that can return oil and prevent leakage proposed by the present invention.

[0031] Legend: 1, fuel tank; 2, connection mechanism; 201, fixed cylinder; 202, adjustment groove; 203, rotating rod; 204, adjustment block; 205, connection groove; 206, adjustment rod; 207, slider; 208, limit block; 209, rotating block; 210, connection cylinder; 211, connecting cylinder; 212, sealing ring; 213, force-applying rod; 214, anti-slip sleeve; 215, torsion spring; 216, protective ring; 3, cleaning mechanism; 31, fixing plate; 32, motor; 33, connection frame; 34, cleaning plate; 35, connecting rod; 36, driving block; 37, limit plate; 38, connection ring; 4, replacement mechanism; 41, mounting plate; 42, special-shaped groove; 43, assembly rod; 44, rotating ring; 45, friction block; 46, convex block; 5, oil pipe; 6, fuel gun body. Detailed implementation manners

[0032] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described below with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0033] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from this description. Therefore, the present invention is not limited by the specific embodiments disclosed in the following specification.

[0034] Embodiment 1, as Figure 1-10 shown, the present invention provides a self-sealing fuel gun that can return oil and prevent leakage, including a fuel tank 1, an oil pipe 5, a fuel gun body 6, a replacement mechanism 4, a connection mechanism 2, an anti-backflow module and an anti-leakage module. One end of the oil pipe 5 is fixedly communicated with the fuel tank 1. The anti-backflow module is arranged inside the fuel tank 1, and the position of the anti-backflow module corresponds to the position of the oil pipe 5. The anti-backflow module includes a flow sensor, a pressure sensor and an automatic valve. The anti-leakage module is arranged at the oil outlet of the fuel gun body 6. The anti-leakage module includes a leakage sensor, an anti-leakage valve and a temperature and humidity sensor. A connection mechanism 2 is arranged on one side of the oil pipe 5 close to the fuel gun body 6. A cleaning mechanism 3 is arranged on one side of the fuel tank 1 close to the fuel gun body 6. Replacement mechanisms 4 are arranged on both sides of the connection frame 33.

[0035] Specifically described below are the specific settings and functions of its connection mechanism 2, cleaning mechanism 3, and replacement mechanism 4.

[0036] As Figures 2-5As shown in the figure, the connecting mechanism 2 includes a fixed cylinder 201 which is connected to the fuel dispenser body 6. Both ends of the arc surface of the fixed cylinder 201 are provided with adjustment slots 202. The same rotating rod 203 is rotatably connected to both sides of the inner wall of the adjustment slot 202. An adjustment block 204 is installed on the arc surface of the rotating rod 203. A connection slot 205 is provided on one side of the adjustment block 204. A slider 207 is slidably connected to the inner wall of the connection slot 205. An adjustment rod 206 is rotatably connected to one side of the inner wall of the connection slot 205. The adjustment rod 206 can rotate within the connection slot 205. The arc surface of the adjustment rod 206 is threadedly connected to the inner wall of the slider 207. The adjustment rod 206 can drive the slider 207 to slide within the connection slot 205. One end of the arc surface of the adjustment rod 206 away from the connection slot 205 is installed with a rotating block 209. A connection cylinder 211 is installed on the side of the fixed cylinder 201 away from the fuel dispenser body 6. A sealing ring 212 is installed on the arc surface of the connection cylinder 211. A connection cylinder 210 is slidably connected to the arc surface of the sealing ring 212. The sealing ring 212 can improve the tightness of the connection between the connection cylinder 211 and the connection cylinder 210. A limiting block 208 is installed on the side of the slider 207 close to the connection cylinder 210. The two limiting blocks 208 are respectively slidably connected to the inner wall of the connection cylinder 210. The side of the connection cylinder 210 away from the connection cylinder 211 is connected to the fuel pipe 5. An anti-backflow module is installed on the fuel tank 1. The anti-backflow module is composed of a flow sensor, a pressure sensor and an automatic valve. The flow sensor can monitor the oil flow in real time and detect whether there is a sign of reverse oil flow. Once the flow direction changes, the control system can interrupt the oil flow in time to prevent backflow; the pressure sensor can monitor the pressure at the oil outlet of the fuel dispenser in real time. If abnormal pressure is found, the fuel dispenser can be closed or other emergency measures can be taken through the control system. The automatic valve sensor monitors the direction and pressure of the oil flow, and the valve automatically closes during backflow. An anti-leakage module is installed in the fuel dispenser body 6. The anti-leakage module is composed of a leakage sensor, an anti-leakage valve and a temperature and humidity sensor. The leakage sensor can sense whether the oil product leaks. Once leakage is detected, it will immediately alarm and cut off the oil flow; the anti-leakage valve automatically cuts off the oil flow when the fuel dispenser body 6 is separated from the fuel gun seat to prevent oil leakage;The temperature and humidity sensor can combine temperature and humidity sensors to monitor environmental changes, avoiding oil leakage or volatilization during the refueling process due to changes in the external environment. Through the anti-backflow module and anti-leakage module, the refueling gun body 6 has a self-closed function. The refueling gun body 6 can prevent oil from leaking during the refueling process and has a backflow function to ensure that the oil can smoothly flow back to the oil tank or storage container, avoiding waste and environmental pollution. However, when the refueling gun body 6 is used for a long time, a large amount of dust will adhere to the nozzle of the refueling gun body 6, which will cause the refueling gun body 6 to become blocked. The refueling efficiency of the blocked refueling gun body 6 will decrease. The refueling gun body 6 and the oil pipe 5 are connected by bolts, and the speed of disassembling the refueling gun body 6 from the oil pipe 5 is relatively slow, which will affect the efficiency of dredging the nozzle of the refueling gun body 6. At this time, through the connecting mechanism 2, the refueling gun body 6 can be quickly disassembled from the oil pipe 5, thereby improving the efficiency of the worker in dredging the refueling gun. The inner wall of the rotating block 209 slidably penetrates through the force-increasing rod 213. The cross-section of the force-increasing rod 213 is circular. The force-increasing rod 213 can slide in the rotating block 209 to increase the rotation speed of the rotating block 209. The arc surface of the force-increasing rod 213 is fixedly connected with an anti-slip sleeve 214. The arc surface of the anti-slip sleeve 214 is provided with anti-slip lines. The protective sleeve can increase the friction on the surface of the rod body of the force-increasing rod 213. Both ends of the arc surface of the rotating rod 203 are slidably connected with a coil spring 215. The two ends of the coil spring 215 are respectively fixedly connected with the adjusting block 204 and the side wall of the adjusting groove 202. The coil spring 215 can quickly drive the adjusting block 204 to reset, improving the efficiency of replacing the refueling gun body 6. One side of the connecting cylinder 210 close to the fixed cylinder 201 is fixedly connected with a protective ring 216. The cross-section of the protective ring 216 is circular. The protective ring 216 can prevent the connecting cylinder 210 from directly contacting the fixed cylinder 201 and avoid abutment damage between the two.;

[0037] Such as Figure 6 And Figure 7As shown, the cleaning mechanism 3 includes a fixing plate 31. The fixing plate 31 is connected to one side of the fuel tank 1. A motor 32 is installed on one side of the fixing plate 31. The output end of the motor 32 is fixedly connected to a connecting rod 35. The motor 32 can drive the connecting rod 35 to rotate through the output end. A connecting frame 33 is provided on the side of the fixing plate 31 close to the connecting rod 35. One side of the connecting frame 33 is connected to the fuel tank 1. A driving block 36 is slidably connected to the inner wall of the connecting frame 33. The inner wall of the driving block 36 is threadedly connected to the arc surface of the connecting rod 35. The driving block 36 can slide within the connecting frame 33. Two limiting plates 37 are fixedly connected to the side of the driving block 36 away from the fuel tank 1. The limiting plates 37 are elastic plates. Cleaning plates 34 are fixedly connected to both sides of the connecting frame 33 by means of a replacement mechanism 4. When the fuel gun body 6 is in use, it will cause the fuel pipe 5 to come into contact with the ground, and the dust on the ground will adhere to the surface of the fuel pipe 5. Over time, a large amount of dust will accumulate on the surface of the fuel pipe 5. When the worker uses the fuel gun body 6, the dust on the fuel pipe 5 will adhere to the worker's clothes, which will affect the use effect of the fuel pipe 5 and also affect the appearance of the surface of the fuel pipe 5. At this time, the cleaning mechanism 3 can be used to clean the surface of the fuel pipe 5, so that the cleanliness of the surface of the fuel pipe 5 can be improved through the cleaning mechanism 3. One end of the arc surface of the connecting rod 35 away from the motor 32 is fixedly connected to a connecting ring 38, and the connecting ring 38 can protect the contact position between the connecting rod 35 and the driving block 36.

[0038] As Figure 8 and Figure 9 shown, the replacement mechanism 4 includes a mounting plate 41. One side of the mounting plate 41 is connected to the cleaning plate 34. Two special-shaped grooves 42 are opened at one end of the mounting plate 41. Assembly rods 43 are slidably connected to the inner walls of the special-shaped grooves 42. The four assembly rods 43 are respectively connected to both sides of the connecting frame 33. A rotating ring 44 is threadedly connected to the arc surface of the assembly rod 43. When the cleaning plate 34 is worn after long-term use, the replacement mechanism 4 can be used to replace the worn cleaning plate 34. Thus, by replacing the new cleaning plate 34, the use effect of the cleaning plate 34 can be improved and the cleaning efficiency can be increased. A number of friction blocks 45 are fixedly connected to the side of the rotating ring 44 close to the mounting plate 41. The number of friction blocks 45 is evenly distributed on the rotating ring 44. The friction blocks 45 can increase the friction force between the rotating ring 44 and the connecting frame 33. One end of the arc surface of the assembly rod 43 is fixedly connected to a convex block 46. The cross-section of the convex block 46 is in a funnel shape. The convex block 46 can increase the connection speed between the rotating ring 44 and the arc surface of the assembly rod 43.

[0039] The overall working principle is as follows: Rotate the rotating rod 203. The movement of the rotating rod 203 can drive the adjusting rod 206 to rotate in the connecting groove 205. At this time, the adjusting rod 206 can drive the slider 207 to slide in the connecting groove 205. The movement of the slider 207 will drive the limiting block 208 to move. The movement of the limiting block 208 will slide in the direction away from the connecting cylinder 210. At this time, by rotating the rotating block 209, the limiting block 208 can be removed from the inner wall of the connecting frame 33. At this time, on the rotating rod 203 installed in the adjusting groove 202, the adjusting block 204 can be rotated. Then, the adjusting block 204 can drive the rotating block 209 to move in the direction away from the oil pipe 5. At this time, the fixing effect between the oil pipe 5 and the fuel gun body 6 can be released. Then, the fuel gun body 6 can be pulled. The movement of the fuel gun body 6 will drive the fixed cylinder 201 and the connecting cylinder 211 to move. Then, the connecting cylinder 211 can be pulled out from the connecting cylinder 210, and the fuel gun body 6 can be removed from the oil pipe 5. The force - adding rod 213 can slide in the rotating block 209 to increase the rotating speed of the rotating block 209. The protective sleeve can increase the friction force on the surface of the rod body of the force - adding rod 213. The coil spring 215 can quickly drive the adjusting block 204 to reset, improving the efficiency of replacing the fuel gun body 6. The protective ring 216 can prevent the connecting cylinder 210 from directly contacting the fixed cylinder 201 and avoid mutual abutment damage between the two.

[0040] Place the side of the fuel gun body 6 close to the oil pipe 5 on the upper ends of the two limiting plates 37. At this time, the oil pipe 5 will be located inside the two limiting plates 37. Then, start the motor 32 installed on the fixing plate 31. The movement of the motor 32 will drive the connecting rod 35 to rotate through the output end. The movement of the connecting rod 35 will drive the driving block 36 to slide in the connecting frame 33. At this time, the driving block 36 can drive the two limiting plates 37 to move. Thus, the oil pipe 5 can be driven by the limiting plates 37 to contact the cleaning plates 34 installed on both sides of the connecting plate. Thus, the surface of the oil pipe 5 can be cleaned by the cleaning plates 34. The connecting ring 38 can protect the contact position between the connecting rod 35 and the driving block 36.

[0041] Rotate the rotating ring 44 on the assembling rod 43. The rotating ring 44 will rotate off the assembling rod 43. At this time, by sliding the assembling rod 43 in the special - shaped groove 42, the worn cleaning plate 34 can be removed from the connecting frame 33. Connect the special - shaped groove 42 opened on the new cleaning plate 34 with the arc surface of the assembling rod 43, and make the assembling rod 43 contact one end of the inner wall of the special - shaped groove 42. At this time, rotate the rotating ring 44 on the assembling rod 43. Then, the mounting plate 41 can be fixed on the assembling rod 43 by the rotating ring 44. At this time, the cleaning plate 34 can be fixed on the connecting frame 33, and the replacement of the cleaning plate 34 is completed. The friction block 45 can increase the friction force between the rotating ring 44 and the connecting frame 33. The convex block 46 can increase the connection speed between the rotating ring 44 and the arc surface of the assembling rod 43.

[0042] As described above, it is only the preferred embodiment of the present invention, and does not limit the present invention in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A self-sealing fuel gun that can return oil and prevent leakage, comprising a fuel tank (1), a fuel pipe (5), a fuel gun body (6), a replacement mechanism (4), a connection mechanism (2), an anti-backflow module and an anti-leakage module, characterized in that: One end of the oil pipe (5) is fixedly communicated with the fuel tank (1). The anti-backflow module is arranged inside the fuel tank (1), and the position of the anti-backflow module corresponds to the position of the oil pipe (5). The anti-backflow module includes a flow sensor, a pressure sensor and an automatic valve. The anti-leakage module is arranged at the oil outlet of the fuel gun body (6). The anti-leakage module includes a leakage sensor, an anti-leakage valve and a temperature and humidity sensor. A connecting mechanism (2) is arranged on one side of the oil pipe (5) close to the fuel gun body (6). The connecting mechanism (2) includes a fixing cylinder (201). The fixing cylinder (201) is fixedly communicated with one side of the fuel gun body (6). Adjusting grooves (202) are opened at both ends of the arc surface of the fixing cylinder (201). The same rotating rod (203) is rotatably connected to both sides of the inner wall of the adjusting groove (202). An adjusting block (204) is fixedly connected to the arc surface of the rotating rod (203). A connecting groove (205) is opened on one side of the adjusting block (204). A slider (207) is slidably connected to the inner wall of the connecting groove (205). An adjusting rod (206) is rotatably connected to one side of the inner wall of the connecting groove (205). The arc surface of the adjusting rod (206) is threadedly connected to the inner wall of the slider (207). A rotating block (209) is fixedly connected to one end of the arc surface of the adjusting rod (206) far from the connecting groove (205). A connecting cylinder (211) is fixedly communicated with one side of the fixing cylinder (201) far from the fuel gun body (6). A sealing ring (212) is fixedly connected to the arc surface of the connecting cylinder (211). A connecting cylinder (210) is slidably connected to the arc surface of the sealing ring (212). A limiting block (208) is fixedly connected to one side of the slider (207) close to the connecting cylinder (210). The two limiting blocks (208) are respectively slidably connected to the inner wall of the connecting cylinder (210). One side of the connecting cylinder (210) far from the connecting cylinder (211) is fixedly communicated with the oil pipe (5).

2. The self-sealing fuel gun according to claim 1, which is oil-returnable and leak-proof, is characterized in that: A force-applying rod (213) slidably penetrates through the inner wall of the rotating block (209), and the cross section of the force-applying rod (213) is circular.

3. The self-sealing fuel gun capable of oil return and leak prevention according to claim 2, characterized in that: An anti-slip sleeve (214) is fixedly connected to the arc surface of the force-applying rod (213), and anti-slip lines are opened on the arc surface of the anti-slip sleeve (214).

4. The self-sealing fuel gun capable of oil return and leak prevention according to claim 1, wherein: Both ends of the arc surface of the rotating rod (203) are slidably connected with a coil spring (215), and both ends of the coil spring (215) are respectively fixedly connected to the adjusting block (204) and the side wall of the adjusting groove (202).

5. A self-sealing fuel nozzle that can return oil and prevent leakage according to claim 1, characterized in that: A protective ring (216) is fixedly connected to one side of the connecting cylinder (210) close to the fixing cylinder (201), and the cross section of the protective ring (216) is circular.

6. The self-sealing fuel gun capable of oil return and leakage prevention according to claim 1, characterized in that: On one side of the fuel tank (1) close to the fuel gun body (6), there is a cleaning mechanism (3). The cleaning mechanism (3) includes a fixing plate (31). The fixing plate (31) is fixedly connected to one side of the fuel tank (1). On one side of the fixing plate (31), there is a motor (32) fixedly connected. The output end of the motor (32) is fixedly connected with a connecting rod (35). On the side of the fixing plate (31) close to the connecting rod (35), there is a connecting frame (33). One side of the connecting frame (33) is fixedly connected to the fuel tank (1). The inner wall of the connecting frame (33) is slidably connected with a driving block (36). The inner wall of the driving block (36) is threadedly connected to the arc surface of the connecting rod (35). On the side of the driving block (36) away from the fuel tank (1), there are two limiting plates (37) fixedly connected. The limiting plates (37) are elastic plates. On both sides of the connecting frame (33), there are cleaning plates (34) fixedly connected by a replacement mechanism (4).

7. The self-sealing fuel gun capable of oil return and leakage prevention according to claim 6, characterized in that: One end of the arc surface of the connecting rod (35) away from the motor (32) is fixedly connected with a connecting ring (38).

8. The self-sealing fuel nozzle capable of oil return and leak prevention according to claim 6, characterized in that: On both sides of the connecting frame (33), there is a replacement mechanism (4). The replacement mechanism (4) includes a mounting plate (41). One side of the mounting plate (41) is fixedly connected to the cleaning plate (34). At one end of the mounting plate (41), there are two special-shaped grooves (42) opened. The inner wall of the special-shaped groove (42) is slidably connected with an assembly rod (43). The four assembly rods (43) are respectively fixedly connected to both sides of the connecting frame (33). The arc surface of the assembly rod (43) is threadedly connected with a rotating ring (44).

9. The self-sealing fuel gun capable of oil return and leakage prevention according to claim 8, characterized in that: On the side of the rotating ring (44) close to the mounting plate (41), there are a number of friction blocks (45) fixedly connected. The number of friction blocks (45) is evenly distributed on the rotating ring (44).

10. A self-sealing fuel nozzle capable of oil return and leak prevention according to claim 8, characterized in that: One end of the arc surface of the assembly rod (43) is fixedly connected with a convex block (46). The cross-section of the convex block (46) is funnel-shaped.

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