Oiling device for bearing box

Abstract

The utility model relates to the technical field of oil filling devices of rolling mills, in particular to an oil filling device for a bearing box, which comprises an oil tank, a quantitative oil filling pump, an automatic pipe collecting device and an oil gun, the quantitative oil filling pump is fixedly arranged on the oil tank, and an oil inlet of the quantitative oil filling pump is fixedly connected with the oil tank through an oil filling pipeline. An oil outlet of the quantitative refueling pump is fixedly connected with one end of an oil outlet pipeline, an oil outlet one-way valve is fixedly arranged on the oil outlet pipeline, the other end of the oil outlet pipeline is fixedly connected and communicated with one end of a backflow pipeline and one end of a connecting pipeline, the other end of the backflow pipeline is fixedly connected with an oil tank, and an overflow valve is fixedly arranged on the backflow pipeline. The automatic pipe collecting device is fixedly arranged outside the oil tank, an automatically-contracted refueling hose is wound on the automatic pipe collecting device, one end of the refueling hose is fixedly connected with the other end of the connecting pipeline, and the other end of the refueling hose is fixedly connected with the oil gun. According to the oiling device for the bearing box, quantitative oiling of the bearing box is completed at a time, and oil waste is effectively avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of rolling mill lubrication devices, specifically to a lubrication device for bearing housings. Background Technology

[0002] During the rolling mill (or other equipment) production process, the pressure acting on the rolls and the high-speed rotation of the rolls cause the processed product to undergo rolling (thickness) deformation. Each end of the roll has a bearing housing supporting it. The bearings inside the bearing housings are lubricated; lubricating oil is added to the bearings during installation. The lubricating oil lubricates and dissipates heat from the high-speed rotating bearings. After rolling a certain amount of product, the surface roughness, crown, and fatigue of the rolls will change, failing to meet the requirements of the rolled product. The rolls need to be replaced. The replaced rolls require the removal of the bearing housings at both ends and are transported to a roll grinding machine for surface grinding. The removed bearing housings are then cleaned and inspected. After grinding, the rolls need to have their bearing housings reinstalled for reuse in the rolling mill. After installation, the bearing housings need to be refilled with lubricating oil (the original lubricating oil in the bearing housing, which drained into the oil collection tank after disassembly, is no longer used) to ensure lubrication for the next use.

[0003] The current method for adding lubricating oil to bearing housings is as follows: Open the oil filler hole on the bearing housing, and use an oil filler bottle filled with oil to add oil to the filler hole. During the oil filling process, observe the oil level indicator on the side of the bearing housing; the standard is when the oil level reaches halfway. The amount of oil added varies depending on the size of the bearing housing; the staff should determine the actual amount of oil added based on the type of bearing housing on site.

[0004] However, there are currently the following problems when using oil bottles to add lubricating oil to the bearing housing:

[0005] First, fuel bottles must not be tilted when placed in the work area, otherwise fuel will spill. Second, when using a fuel bottle to scoop fuel from an oil drum, improper control can lead to leaks. Third, when opening the oil plug at the bearing housing's filling port and aligning the fuel bottle with the filling port, the speed of filling is inconsistent and varies from person to person, which can lead to the bottle opening not being aligned with the filling port or filling too quickly, causing spills. Finally, the amount of fuel dispensed is not standardized because it is not a fixed person refueling; even the same person may dispense different amounts at different times. All of these situations will result in fuel waste.

[0006] Second, since the amount of fuel added is determined by observing the fuel level through the side window, staff have to bend over multiple times to observe the fuel level and add fuel multiple times to complete one full refueling. This results in high labor intensity for staff, and the fuel level appears different depending on the observation angle, leading to inconsistent fuel addition amounts.

[0007] Therefore, there is an urgent need for a lubrication device for bearing housings to solve the above problems. Utility Model Content

[0008] To address the technical problems of inconsistent oil volume, oil waste, and high labor intensity when workers manually add oil to bearing housings using oil bottles, this utility model provides a bearing housing oiling device that replaces manual oil bottle operation. The device prevents oil leakage from the tank and nozzle, and utilizes a combination of an oil nozzle and a metering pump for precise oil dispensing. The entire process is free of spills and leaks, completing the precise oiling of the bearing housing in one pass with consistently accurate volume, effectively avoiding oil waste, reducing worker workload, and improving refueling efficiency.

[0009] This utility model provides a refueling device for bearing housings, including an oil tank, a metering refueling pump, an automatic hose reel, and a refueling nozzle. The metering refueling pump is fixedly mounted on the oil tank. The inlet of the metering refueling pump is fixedly connected to the bottom of the oil tank via a refueling pipe. The outlet of the metering refueling pump is fixedly connected to one end of an outlet pipe. An outlet check valve is fixedly mounted on the outlet pipe. The other end of the outlet pipe is fixedly connected to and communicates with one end of a return pipe and a connecting pipe. The other end of the return pipe is fixedly connected to the top of the oil tank, and an overflow valve is fixedly mounted thereon. The automatic hose reel is fixedly mounted outside the oil tank. An automatically retractable refueling hose is wound around the automatic hose reel. One end of the refueling hose is fixedly connected to the other end of the connecting pipe, and the other end of the refueling hose is fixedly connected to the refueling nozzle. The metered refueling pump starts, the one-way valve opens, and the overflow valve closes. The metered refueling pump draws lubricating oil from the tank, and the lubricating oil enters the refueling hose through the refueling pipe, the outlet pipe, and the connecting pipe. At the same time, the automatic hose retractor starts, and the person pulls the oil gun to the bearing housing. The force applied by the person causes the refueling hose to extend synchronously. Then, the oil gun is aligned with the refueling hole on the bearing housing, and the oil gun is manually operated to open it. After that, the lubricating oil enters the bearing housing through the oil gun and the refueling hole, completing the metered refueling of the bearing housing in one go, and there is no oil spillage or leakage during the entire refueling process.

[0010] Furthermore, it also includes a U-shaped support base. Multiple semi-circular support grooves are evenly distributed on the top of both side walls of the support base. The two ends of the work roller are respectively engaged in the semi-circular support grooves on the side walls of the support base, which are located at the same horizontal line. Both ends of the work roller are fixedly connected to bearings inside bearing housings. Two bearing housings are located on opposite sides of the outside of the support base. The oil tank is fixedly installed on the bottom wall of the support base and located below the work roller. The automatic pipe retractor is fixedly installed on the side wall of the support base and located outside the support base. The support base supports the work roller to be lubricated and the bearing housings, and the semi-circular support grooves ensure high stability of the work roller and bearing housings. Multiple work rollers can be placed on the support base at one time, and multiple work rollers can be lubricated sequentially by a person.

[0011] Furthermore, two of each of the connecting pipes, automatic hose retractors, and oil guns are provided. One end of one connecting pipe is fixedly connected to the oil outlet pipe, and one end of the other connecting pipe is fixedly connected to the middle of the first connecting pipe. The two automatic hose retractors are respectively fixedly mounted on the two side walls of the support base, and the oiling hoses on the two automatic hose retractors are respectively fixedly connected to the other ends of the two connecting pipes. Two operators can operate two oil guns, which work synchronously to simultaneously lubricate the two bearing boxes on one working roller, further improving oiling efficiency.

[0012] Furthermore, reinforcing beams are fixedly connected between the two ends of both sides of the support base. These reinforcing beams strengthen the overall structure of the support base, ensuring the stability of the work rollers on it.

[0013] Furthermore, it also includes an oil replenishment tank fixedly installed outside the support base. An oil replenishment pump is fixedly installed on the oil tank. The oil inlet of the oil replenishment pump is fixedly connected to the inside of the oil replenishment tank via an oil replenishment hose, and the oil outlet of the oil replenishment pump is fixedly connected to the top of the oil tank via an oil replenishment pipe. An oil replenishment check valve is fixedly installed on the oil replenishment pipe. Oil can be replenished to the oil tank when the oil level is low. When the oil pump starts, the oil replenishment check valve opens, and the lubricating oil in the oil replenishment tank is transported to the oil tank through the oil replenishment hose and oil replenishment pipe.

[0014] Furthermore, it also includes a fixing plate, which is detachably mounted on the top of the support base. The fixing plate has multiple semi-circular fixing grooves evenly arranged at positions corresponding to the semi-circular support grooves. The lower parts of the multiple work rollers are located in the semi-circular support grooves, and the upper parts of the multiple work rollers are located in the semi-circular fixing grooves. The fixing plate is fixed to the top of the support base, and the semi-circular fixing grooves on the fixing plate limit the movement of the work rollers. The cooperation between the semi-circular fixing grooves and the semi-circular support grooves ensures the stability of the work rollers.

[0015] Furthermore, the fixing plate is provided with a first pin hole, and the top of each of the two side walls of the support base is provided with a second pin hole. The pin passes through the first pin hole and the second pin hole and is fixed to the fixing plate and the support base. The fixing plate is detachably mounted on the fixing plate and the support base through the first pin hole, the second pin hole, and the pin.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This utility model provides a refueling device for bearing housings that replaces manual refueling with a refueling bottle. The oil tank and nozzle will not leak. It uses a combination of a nozzle and a metering pump for metered refueling, ensuring no spillage or leakage of oil throughout the entire refueling process. It completes the metered refueling of the bearing housing in one go, and the amount of refueling is always standard, effectively avoiding oil waste, reducing the labor intensity of workers, and improving refueling efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of a lubrication device for a bearing housing according to this utility model;

[0019] Figure 2 This is a side view of the fuel tank structure of this utility model;

[0020] Figure 3 This is a structural schematic diagram of the support base of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of this utility model, which includes two automatic pipe take-up devices;

[0022] Figure 5 This is a top view of the fixing plate of this utility model.

[0023] Figure 6 This is a side view of the fixing plate of this utility model.

[0024] The numbers in the attached diagram are:

[0025] 1. Oil tank; 11. Refueling pipe; 12. Oil outlet pipe; 121. Oil outlet check valve; 13. Return pipe; 131. Overflow valve; 14. Connecting pipe; 15. Sealing door; 16. Level gauge; 2. Quantitative refueling pump; 3. Automatic hose reel; 31. Refueling hose; 4. Oil gun; 5. Support base; 51. Semi-circular support groove; 52. Reinforcing beam; 6. Oil replenishment tank; 7. Oil replenishment pump; 71. Oil replenishment hose; 72. Oil replenishment pipe; 721. Oil replenishment check valve; 8. Fixing plate; 81. Semi-circular fixing groove; 9. Working roller; 91. Bearing box. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0027] like Figures 1-6As shown, a bearing housing refueling device includes an oil tank 1, a metering refueling pump 2, an automatic hose reel 3, and a refueling nozzle 4. The metering refueling pump 2 is fixedly mounted on the oil tank 1 using a locking connection. The oil inlet of the metering refueling pump 2 is fixedly connected to the bottom of the oil tank 1 via a refueling pipe 11. The oil outlet of the metering refueling pump 2 is fixedly connected to one end of an oil outlet pipe 12. An oil outlet check valve 121 is fixedly installed on the oil outlet pipe 12. The other end of the oil outlet pipe 12 is fixedly connected to one end of a return pipe 13 and a connecting pipe 14. Furthermore, the other end of the return pipe 13 is fixedly connected to the top of the oil tank 1, and an overflow valve 131 is fixedly installed on it. The automatic hose reel 3 can be installed at a certain position according to usage requirements. In this embodiment, the automatic hose reel 3 is fixedly installed outside the oil tank 1. An automatically retractable refueling hose 31 is wound around the automatic hose reel 3. The refueling hose 31 can be an oil-resistant rubber hose. One end of the refueling hose 31 is fixedly connected to the other end of the connecting pipe 14, and the other end of the refueling hose 31 is fixedly connected to the fuel nozzle 4. The structure of the automatic hose reel 3 and the fuel nozzle 4 is existing technology and will not be described in detail here. It should be noted that the refueling hose 31 is wound around the automatic hose reel 3. After the automatic hose reel 3 is activated, it can retract and extend the refueling hose 31, thereby driving the fuel nozzle 4 to move. After the refueling hose 31 is fully retracted, the fuel nozzle 4 is located outside the automatic hose reel 3. The automatic hose reel 3 can also be called an automatic telescopic hose reel, hose reel, etc.

[0028] Move the work roll 9 (roll) that needs lubrication to the side of the lubrication device, and operate the lubrication device to apply a quantitative amount of lubricating oil to the bearing housing 91 on the work roll 9.

[0029] Specifically, the metered oil pump 2 starts, the oil outlet check valve 121 opens, and the overflow valve 131 closes. The metered oil pump 2 draws lubricating oil from the oil tank 1. The lubricating oil enters the oil filling hose 31 through the filling pipe 11, the oil outlet pipe 12, and the connecting pipe 14. At the same time, the automatic hose reel 3 starts. A person pulls the oil gun 4 to the bearing housing 91, and the force applied by the person causes the oil filling hose 31 to extend synchronously. Then, the oil gun 4 is aligned with the filling hole on the bearing housing 91, and the oil gun 4 is manually operated to open it. After that, the lubricating oil enters the bearing housing 91 through the oil gun 4 and the filling hole, completing the metered filling of the bearing housing 91 in one go, and there is no oil spillage or leakage during the entire filling process. In addition, the oil gun 4 can also fill multiple bearing housings 91 of different sizes, improving the utilization rate. The refueling pipe 11 is connected to the bottom of the oil tank 1, and the oil outlet pipe 12 is connected to the top of the oil tank 1, ensuring that the metered refueling pump 2 can draw out the lubricating oil from the oil tank 1 during refueling; after refueling, the remaining lubricating oil flows back into the oil tank 1 and can be used again.

[0030] After the oil is added, the one-way valve 121 closes. The operator manually closes the oil gun 4 and removes it from the filling port. No further force is applied to stretch the oil hose, and the oil hose 31 automatically retracts, returning the oil gun 4 to its initial position (i.e., the oil gun 4 returns to a position close to the automatic retractor 3). If there is still lubricating oil in the connecting pipe 14 and the oil hose 31 at this time, the remaining lubricating oil will increase the pressure inside both pipes. Upon this pressure increase, the overflow valve 131 automatically opens, and the remaining lubricating oil flows back to the oil tank 1 through the return pipe 13 for continued use.

[0031] The refueling device in this embodiment replaces manual refueling with a refueling bottle. The oil tank 1 and the oil gun 4 will not leak oil. At the same time, the oil gun 4 and the quantitative refueling pump 2 work together to perform quantitative refueling. There is no oil spillage or leakage during the entire refueling process. The quantitative refueling of the bearing box 91 is completed in one go, and the refueling amount is always standard, which effectively avoids oil waste, reduces the labor intensity of the staff, and improves refueling efficiency.

[0032] In one possible implementation, in this embodiment, both ends of the refueling pipe 11 are fixedly connected to the inlet of the quantitative refueling pump 2 and the first opening at the bottom of the fuel tank 1 via pipe connectors. A manual valve is installed on the refueling pipe 11, which can be opened or closed according to refueling needs. One end of the outlet pipe 12 is fixedly connected to the outlet of the quantitative refueling pump 2 via a pipe connector, and the other end of the outlet pipe 12 is fixedly connected to and communicates with the return pipe 13 and the connecting pipe 14. The other end of the return pipe 13 is fixedly connected to the second opening at the top of the fuel tank 1 via a pipe connector. The other end of the connecting pipe 14 is fixedly connected to one end of the refueling hose 31 via a pipe connector, and the other end of the refueling hose 31 is fixedly connected to the fuel nozzle 4 via a pipe connector.

[0033] As one possible implementation, it also includes a U-shaped support base 5. Multiple semi-circular support grooves 51 are evenly arranged on the top of both side walls of the support base 5. The two ends of the working roller 9 are respectively engaged in the semi-circular support grooves 51 on the side walls of the support base 5 at the same horizontal line. Both ends of the working roller 9 are fixedly connected to bearings inside bearing housings 91. The two bearing housings 91 are located on opposite sides of the outside of the support base 5. For convenient lubrication, in this embodiment, the oil tank 1 is fixedly installed on the bottom wall of the support base 5 and located below the working roller 9. The automatic hose reel 3 is fixedly installed on the side wall of the support base 5 and located outside the support base 5. The support base 5 supports the working roller 9 to be lubricated and the bearing housings 91. The semi-circular support grooves 51 ensure high stability of the working roller 9 and the bearing housings 91. Multiple working rollers 9 can be placed on the support base 5 at one time, and multiple working rollers 9 can be lubricated sequentially. The length of the lubrication hose 31 on the automatic hose reel 3 can meet the lubrication needs of multiple working rollers 9.

[0034] In one possible implementation, two connecting pipes 14, automatic hose retractors 3, and oil guns 4 are provided. The two connecting pipes 14 are fixedly connected, with one end of one connecting pipe 14 fixedly connected to the oil outlet pipe 12. Specifically, one end of one connecting pipe 14 is fixedly connected to the oil outlet pipe 12, and one end of the other connecting pipe 14 is fixedly connected to the middle of the first connecting pipe 14. The two automatic hose retractors 3 are respectively fixedly mounted on the two side walls of the support base 5, and the oiling hoses 31 on the two automatic hose retractors 3 are respectively fixedly connected to the other ends of the two connecting pipes 14. Two operators can operate the two oil guns 4, which operate synchronously to simultaneously lubricate the two bearing housings 91 on one working roller 9, further improving the oiling efficiency.

[0035] As one possible implementation, reinforcing beams 52 are fixedly connected between the two ends of the two side walls of the support base 5. The reinforcing beams 52 strengthen the overall structure of the support base 5 and ensure that the working roller 9 on the support base 5 remains stable.

[0036] As one possible implementation, it also includes an oil replenishment tank 6 fixedly installed outside the support base 5. An oil replenishment pump 7 is fixedly installed on the oil tank 1. The oil inlet of the oil replenishment pump 7 is fixedly connected to the inside of the oil replenishment tank 6 via an oil replenishment hose 71. Specifically, the oil inlet of the oil replenishment pump 7 is fixedly connected to the oil port on the oil replenishment tank 6 via the oil replenishment hose 71, and the end of the oil replenishment hose 71 extends into the inside of the oil replenishment tank 6 through the oil port. The oil outlet of the oil replenishment pump 7 is fixedly connected to the oil tank 1 via an oil replenishment pipe 72, and an oil replenishment check valve 721 is fixedly installed on the oil replenishment pipe 72. Oil replenishment can be performed on the oil tank 1 when the oil level is low. When the oil pump starts, the oil replenishment check valve 721 opens, and the lubricating oil in the oil replenishment tank 6 is transported to the oil tank 1 through the oil replenishment hose 71 and the oil replenishment pipe 72. In this embodiment, the oil port on the oil replenishment tank 6 can be set at the top or middle of the oil replenishment tank 6 or other locations. The oil replenishment pipe 72 can be fixedly connected to the oil port at other locations of the oil replenishment tank 6 as needed to ensure that the oil replenishment pump 7 can extract the lubricating oil from the oil replenishment tank 6.

[0037] Preferably, a manhole is provided on the oil tank 1, and a sealing door 15 is fixedly connected to the manhole by bolts and nuts. After long-term use, the sealing door 15 can be opened to clean the oil tank 1.

[0038] Preferably, a level gauge 16 is installed on the oil tank 1 to facilitate staff to understand the amount of lubricating oil in the oil tank 1 and to facilitate oil replenishment.

[0039] As one possible implementation, in this embodiment, the two ends of the oil replenishment hose 71 are fixedly connected to the oil inlet of the oil replenishment pump 7 and the oil outlet on the oil replenishment tank 6 through pipe connectors; the two ends of the oil replenishment pipe 72 are fixedly connected to the oil outlet of the oil replenishment pump 7 and the third opening provided on the top of the oil tank 1 through pipe connectors.

[0040] As one possible implementation, a fixing plate 8 is also included. The fixing plate 8 is detachably mounted on the top of the support base 5. Multiple semi-circular fixing grooves 81 are evenly arranged on the fixing plate 8 at positions corresponding to the semi-circular support grooves 51. The lower parts of the multiple working rollers 9 are located in the semi-circular support grooves 51, and the upper parts of the multiple working rollers 9 are located in the semi-circular fixing grooves 81. When the semi-circular support grooves 51 on the support base 5 support the multiple working rollers 9 and the bearing housing 91, to prevent external forces from hitting the working rollers 9 and causing them to fall or shift, thus affecting the lubrication of the bearing housing 91, the fixing plate 8 is fixed to the top of the support base 5. The semi-circular fixing grooves 81 on the fixing plate 8 limit the movement of the working rollers 9. The semi-circular fixing grooves 81 and the semi-circular support grooves 51 cooperate to ensure the stability of the working rollers 9.

[0041] In one possible implementation, the fixing plate 8 is provided with a first pin hole, and the top of each of the two side walls of the support base 5 is provided with a second pin hole. The pin passes through the first pin hole and the second pin hole and is fixed to the fixing plate 8 and the support base 5. The fixing plate 8 is detachably mounted on the fixing plate 8 and the support base 5 through the first pin hole, the second pin hole, and the pin.

[0042] The embodiments described above are merely preferred embodiments of this utility model and are only used to explain this utility model. They are not intended to limit the scope of implementation of this utility model. For those skilled in the art, other implementation methods can be easily made by substitution or modification based on the technical content disclosed in this specification. Therefore, all changes and improvements made to the principles and process conditions of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A lubrication device for a bearing housing, characterized in that, The system includes a fuel tank (1), a metered refueling pump (2), an automatic hose reel (3), and a fuel nozzle (4). The metered refueling pump (2) is fixedly mounted on the fuel tank (1). The inlet of the metered refueling pump (2) is fixedly connected to the bottom of the fuel tank (1) via a refueling pipe (11). The outlet of the metered refueling pump (2) is fixedly connected to one end of an outlet pipe (12). An outlet check valve (121) is fixedly mounted on the outlet pipe (12). The other end of the outlet pipe (12) is connected to a return pipe (13). One end of each connecting pipe (14) is fixedly connected and connected. The other end of the return pipe (13) is fixedly connected to the top of the oil tank (1) and an overflow valve (131) is fixedly installed on it. The automatic hose reel (3) is fixedly installed outside the oil tank (1). An automatically retractable refueling hose (31) is wound around the automatic hose reel (3). One end of the refueling hose (31) is fixedly connected to the other end of the connecting pipe (14), and the other end of the refueling hose (31) is fixedly connected to the oil gun (4).

2. The refueling device according to claim 1, characterized in that, It also includes a U-shaped support base (5), on which multiple semi-circular support grooves (51) are evenly arranged on the top of the two side walls. The two ends of the working roller (9) are respectively clamped on the semi-circular support grooves (51) on the two side walls of the support base (5) at the same horizontal line. Both ends of the working roller (9) are fixedly connected to the bearings in the bearing housing (91). The two bearing housings (91) are respectively located on both sides outside the support base (5). The oil tank (1) is fixedly arranged on the bottom wall of the support base (5) and located below the working roller (9). The automatic tube take-up device (3) is fixedly arranged on the side wall of the support base (5) and located outside the support base (5).

3. The refueling device according to claim 2, characterized in that, Two of each of the connecting pipe (14), automatic hose reel (3), and oil gun (4) are provided. One end of one of the connecting pipes (14) is fixedly connected to the oil outlet pipe (12), and one end of the other connecting pipe (14) is fixedly connected to the middle of one of the connecting pipes (14). The two automatic hose reels (3) are respectively fixedly installed on the two side walls of the support base (5), and the refueling hoses (31) on the two automatic hose reels (3) are respectively fixedly connected to the other end of the two connecting pipes (14).

4. The refueling device according to claim 2, characterized in that, A reinforcing beam (52) is fixedly connected between the two ends of the two side walls of the support base (5).

5. The refueling device according to claim 2, characterized in that, It also includes an oil replenishment tank (6) fixedly installed outside the support base (5), an oil replenishment pump (7) fixedly installed on the oil tank (1), the oil inlet of the oil replenishment pump (7) is fixedly connected to the inside of the oil replenishment tank (6) through an oil replenishment hose (71), the oil outlet of the oil replenishment pump (7) is fixedly connected to the top of the oil tank (1) through an oil replenishment pipe (72), and an oil replenishment check valve (721) is fixedly installed on the oil replenishment pipe (72).

6. The refueling device according to claim 2, characterized in that, It also includes a fixing plate (8), which is detachably mounted on the top of the support base (5). The fixing plate (8) is provided with a plurality of semi-circular fixing grooves (81) at positions corresponding to the semi-circular support grooves (51). The lower parts of the plurality of working rollers (9) are located in the semi-circular support grooves (51), and the upper parts of the plurality of working rollers (9) are located in the semi-circular fixing grooves (81).

7. The refueling device according to claim 6, characterized in that, The fixing plate (8) is provided with a first pin hole, and the top of both sides of the support base (5) are provided with a second pin hole. The pin passes through the first pin hole and the second pin hole and is fixed on the fixing plate (8) and the support base (5).

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