A tire recessed portion outer circulation repairing device and a repairing method thereof

Abstract

The application relates to a tire recessed outer circulation repairing device and a repairing method thereof, and belongs to the field of tire repairing. The device comprises an upper wheel rim and a lower wheel rim installed on a tire shaping machine. The upper wheel rim and the lower wheel rim are used for being inserted into center rings on two sides of a tire to realize positioning and sealing of the tire. An air inlet pipe is fixedly connected to the lower wheel rim, a fan is connected to the air inlet pipe, an air outlet pipe is fixedly connected to one side of the upper wheel rim away from the lower wheel rim, an outer circulation pipe is fixedly connected to the air outlet pipe, and the two ends of the outer circulation pipe are communicated with the air inlet pipe and the air outlet pipe. An electric heating mechanism is arranged in the air inlet pipe, the electric heating mechanism is used for heating air flow entering into the tire, air holes for inflating and deflating the air inlet pipe are formed in the air inlet pipe, and hot gas is circulated between the tire, the air outlet pipe, the outer circulation pipe and the air inlet pipe. The application has the effects of facilitating the repairing of the recessed tire and improving the tire repairing efficiency.

Description

Technical Field

[0001] This application relates to the field of tire repair, and in particular to an external circulation repair device and method for tire dents. Background Technology

[0002] Tires are circular, elastic rubber products that are mounted on various vehicles or machinery and roll on the ground. Tires are usually mounted on metal rims, supporting the vehicle body, buffering external impacts, making contact with the road surface, and ensuring the vehicle's driving performance.

[0003] Tire production involves more than a dozen processes, employing a variety of rubber processing equipment such as braiding machines, rubber mixing machines, internal mixers, calenders, and extruders.

[0004] Tires that have been manufactured and processed are stored in a warehouse. Usually, the tires are stacked together. When the tires are stacked in the warehouse, the upper tires squeeze the lower tires, causing the tires to dent, or they are squeezed by external forces. In order not to affect the quality of the tires, the dented tires need to be repaired.

[0005] Traditional repair methods involve introducing hot steam into the tire. However, due to losses during the transmission process, the temperature of the steam entering the tire is not high, resulting in low repair efficiency. Furthermore, after repair, a large amount of condensation remains in the tire, which is difficult to clean.

[0006] Therefore, designing a tire repair device that facilitates rapid and efficient repair of dented tires is an urgent problem to be solved. Summary of the Invention

[0007] To facilitate the repair of dented tires and improve tire repair efficiency, this application provides an external circulation repair device for tire dents.

[0008] The external circulation repair device for tire dents provided in this application adopts the following technical solution:

[0009] A tire dent repair device with external circulation includes an upper rim and a lower rim mounted on a tire shaping machine. The upper and lower rims are used to insert into the center rings on both sides of the tire to position and seal the tire. An air inlet pipe is fixedly connected to the lower rim, and a fan is connected to the air inlet pipe. An air outlet pipe is fixedly connected to the side of the upper rim away from the lower rim, and an external circulation pipe is fixedly connected to the air outlet pipe. The two ends of the external circulation pipe are respectively connected to the air inlet pipe and the air outlet pipe. An electric heating mechanism is provided in the air inlet pipe to heat the airflow entering the tire. The air inlet pipe has air holes for inflating and deflating the air inlet pipe, so that hot gas can circulate externally between the tire, the air outlet pipe, the external circulation pipe, and the air inlet pipe.

[0010] By adopting the above technical solution, the tire is placed on the lower rim, so that the lower rim is inserted into the tire. The upper mold base moves downward so that the upper rim is inserted into the tire. The upper and lower rims are respectively inserted into the center ring of the tire, fixing and sealing the tire. The tire is connected to the inlet and outlet pipes. Then, appropriate gas is injected into the inlet pipe. Then, the electric heating mechanism is controlled to work. The fan creates negative pressure in the inlet pipe. The negative pressure created by the fan causes the gas to pass through the electric heating mechanism. The motor heating mechanism heats the gas. The hot gas is guided towards the inner wall of the tire, so that the airflow flows upward along the inner wall of the tire. The cold gas in the tire is guided back to the inlet pipe through the outlet pipe and the external circulation pipe. After being heated by the motor heating mechanism, it circulates back into the tire. This realizes the external circulation of hot gas between the tire, outlet pipe, external circulation pipe and inlet pipe. The guide vanes continuously heat the gas. After the hot gas heats the tire to a suitable temperature, the dent in the tire is automatically repaired.

[0011] An external circulation repair device for tire dents includes an upper rim and a lower rim mounted on a tire shaping machine. The upper and lower rims are used to insert into the center rings on both sides of the tire to position and seal the tire. An air inlet pipe is fixedly connected to the lower rim, and a fan is connected to the air inlet pipe. An air outlet pipe is fixedly connected to one side of the lower rim, and an external circulation pipe is fixedly connected to the air outlet pipe. The two ends of the external circulation pipe are respectively connected to the air inlet pipe and the air outlet pipe. An electric heating mechanism is provided in the air inlet pipe to heat the airflow entering the tire. The air inlet pipe has air holes for inflating and deflating the air inlet pipe, so that hot gas can circulate externally between the tire, the air outlet pipe, the external circulation pipe, and the air inlet pipe.

[0012] By adopting the above technical solution, the tire is placed on the lower rim, so that the lower rim is inserted into the tire. The upper mold base moves downward so that the upper rim is inserted into the tire. The upper and lower rims are respectively inserted into the center ring of the tire, fixing and sealing the tire. The tire is connected to the inlet and outlet pipes. Then, appropriate gas is injected into the inlet pipe. Then, the electric heating mechanism is controlled to work. The fan creates negative pressure in the inlet pipe. The negative pressure created by the fan causes the gas to pass through the electric heating mechanism. The motor heating mechanism heats the gas. The hot gas is guided towards the inner wall of the tire, so that the airflow flows upward along the inner wall of the tire. The cold gas in the tire is guided back to the inlet pipe through the outlet pipe and the external circulation pipe. After being heated by the motor heating mechanism, it circulates back into the tire. This realizes the external circulation of hot gas between the tire, outlet pipe, external circulation pipe and inlet pipe. The guide vanes continuously heat the gas. After the hot gas heats the tire to a suitable temperature, the dent in the tire is automatically repaired.

[0013] Optionally, a baffle is connected to the bottom of the upper rim, and a positioning rod is fixedly connected to the baffle to fix the baffle and the upper rim. A gap is left between the baffle and the upper rim for airflow to pass through, and the air outlet extends into the gap between the baffle and the upper rim. A guide plate is provided on the side of the lower rim that is inserted into the tire. The guide plate is provided with a support rod to fix the guide plate to the lower rim. A gap is formed between the guide pipe and the lower rim for airflow to pass through. The end of the air inlet pipe passes through the lower rim and extends into the gap between the guide plate and the lower rim, so as to realize the airflow is transmitted from bottom to top along the inner wall of the tire to heat the inner wall of the tire.

[0014] By adopting the above technical solution, the air guide plate can easily block the airflow introduced by the intake pipe, so that the airflow is guided to the inner wall of the tire along the periphery of the air guide plate, and the airflow flows upward along the inner wall of the tire. Finally, the airflow flows into the gap between the baffle plate and the lower rim through the inner wall, and finally flows into the exhaust pipe and the external circulation pipe, so that the hot airflow flows along the inner wall of the tire, increasing the contact area between the hot airflow and the inner wall of the tire, thereby improving the efficiency of tire dent repair.

[0015] Optionally, the bottom of the upper rim is tapered, and multiple guide rods are fixedly connected to the upper rim. The guide rods are evenly distributed radially from the center of the upper rim to the edge. The air inlet pipe extends out from the middle of the guide plate, and multiple air outlet pipes are fixedly connected to the lower rim. The air outlet pipes pass through the lower rim and extend into the gap between the lower rim and the guide plate, so as to realize the airflow is transmitted from top to bottom along the inner wall of the tire to heat the inner wall of the tire.

[0016] By adopting the above technical solution, hot air enters the tire vertically upward from the center of the guide plate. The bottom of the upper rim is conical, which facilitates the guidance of gas from the center of the upper rim to the periphery of the tire. The guide rod evenly distributes the airflow, causing the airflow to flow evenly downward along the tire sidewall. This ensures close contact between the airflow and the inner wall of the tire, facilitating the heating of the tire by the hot gas, improving heating efficiency, and thus improving the efficiency of tire dent repair.

[0017] Optionally, the electric heating mechanism includes induction heating, resistance heating, electric heating tube, electric arc heating, electron beam heating, infrared heating, and medium heating.

[0018] Optionally, the electric heating mechanism includes a positioning cylinder fixedly connected to the air intake pipe, a fixed cylinder fixedly connected inside the positioning cylinder, the fixed cylinder and the positioning cylinder being concentrically arranged, both ends of the positioning cylinder and the fixed cylinder being open, an electromagnetic coil being wound around the outer wall of the fixed cylinder, a fixed column being connected inside the fixed cylinder, and multiple guide vanes being fixedly connected to the outer wall of the fixed column, the guide vanes being evenly distributed along the circumference of the fixed column, and both the fixed column and the guide vanes being made of metal.

[0019] By employing the above technical solution, an alternating current is passed through the electromagnetic coil, and the alternating current generates an alternating magnetic field, which in turn generates eddy currents inside the metal guide plate, causing the guide plate to heat up rapidly. The electromagnetic coil heats up quickly, thus enabling the airflow passing through the fixed cylinder to be heated up quickly, further improving the repair efficiency of tire dents.

[0020] Optionally, the bottom of the fixed column is fixedly connected to a tapered part, the diameter of which increases sequentially from bottom to top.

[0021] By adopting the above technical solution, the conical part can divert the gas, making it easier for the gas to pass evenly between the guide vanes.

[0022] To facilitate the repair of dented tires and improve tire repair efficiency, this application provides a repair method for a tire dent repair device using an external circulation system.

[0023] The repair method of the external circulation repair device for tire dents provided in this application adopts the following technical solution.

[0024] A method for repairing tire dents using an external circulation repair device includes the following steps:

[0025] S1. Positioning and sealing: Place the tire inside the tire forming machine so that the center ring on one side of the tire is engaged with the lower rim, and the upper rim moves downward and is engaged with the center ring on the other side of the tire. The sealing groove one on the upper rim and the sealing groove two on the lower rim are engaged with the two sides of the tire respectively.

[0026] S2. Inflation: Connect the air source to the air hole on the air intake pipe and inflate the air intake pipe and the tire with a certain amount of appropriate air pressure.

[0027] S3. Gas Circulation: Control the operation of the fan. The negative pressure generated by the fan causes the gas in the intake pipe to flow into the tire through the fixed cylinder. At the same time, the gas in the tire enters the external circulation pipe through the exhaust pipe, and finally enters the fixed cylinder again through the intake pipe, realizing the circulation of gas in the tire, exhaust pipe, external circulation pipe and intake pipe.

[0028] S4. Heating to repair dents: Control the electric heating mechanism to heat the gas passing through the intake pipe. The gas circulates in the intake pipe, tire exhaust pipe and external circulation pipe. The electric heating mechanism continuously heats the gas. The hot gas can heat the tire to a suitable temperature and then automatically repair the dent in the tire.

[0029] S5. Exhaust: After the tire is repaired, the air source is disconnected from the air hole, and the air in the tire and positioning cylinder is discharged outward through the air hole, which makes it easier for the tire to separate from the upper and lower rims.

[0030] S6. Disassembly: The air inside the tire is expelled outwards, the upper rim is controlled to move upwards until it is separated from the tire, and then the tire is removed from the lower rim, thus removing the repaired tire from the tire forming machine.

[0031] By adopting the above technical solution, the tire is placed on the lower rim, so that the lower rim is inserted into the tire. The upper mold base moves downward so that the upper rim is inserted into the tire. The upper and lower rims are respectively inserted into the center ring of the tire, fixing and sealing the tire. The tire is connected to the inlet and outlet pipes. Then, appropriate gas is injected into the inlet pipe. Then, the electric heating mechanism is controlled to work, and the fan creates negative pressure in the inlet pipe. The negative pressure created by the fan forces the gas through the electric heating mechanism, and the electric heating mechanism heats the gas, and the hot gas flows towards the tire. The inner wall of the tire guides the airflow upwards along the inner wall of the tire. The cold air inside the tire is guided back to the intake pipe through the exhaust pipe and the external circulation pipe. After being heated by the motor heating mechanism, it circulates back into the tire. This achieves external circulation of hot air between the tire, exhaust pipe, external circulation pipe, and intake pipe. The guide vanes continuously heat the air. Once the hot air heats the tire to a suitable temperature, the dents in the tire are automatically repaired. Finally, the inflation device is removed to facilitate the discharge of air from the intake pipe and the tire, making it easy to remove the tire from the upper and lower rims. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application.

[0033] Figure 2 This is a cross-sectional view of Embodiment 1 of this application.

[0034] Figure 3 yes Figure 2 Enlarged view of part A.

[0035] Figure 4 This is a schematic diagram of the overall structure of Embodiment 2 of this application.

[0036] Figure 5 This is a cross-sectional view of Embodiment 2 of this application.

[0037] Figure 6 This is a cross-sectional view of Embodiment 2 of this application, taken to highlight the positional relationship between the intake pipe and the exhaust pipe.

[0038] Explanation of reference numerals in the attached drawings: 1. Upper rim; 11. Exhaust pipe; 12. External circulation pipe; 13. Sealing groove one; 14. Baffle; 15. Positioning rod; 16. Guide rod; 2. Lower rim; 21. Intake pipe; 22. Fan; 23. Sealing groove two; 24. Guide plate; 25. Support rod; 3. Electric heating mechanism; 31. Positioning cylinder; 32. Fixing cylinder; 321. Raised edge; 33. Electromagnetic coil; 34. Fixing column; 341. Conical part; 35. Guide vane; 4. Tire; 41. Center ring. Detailed Implementation

[0039] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0040] Example 1:

[0041] Embodiment 1 of this application discloses an external circulation repair device for tire dents. (Refer to...) Figure 1 and Figure 2 A tire dent repair device with external circulation includes an upper rim 1 and a lower rim 2 mounted on a tire shaping machine. The upper rim 1 is located above the lower rim 2. The upper rim 1 and lower rim 2 are respectively mounted on an upper mold base and a lower mold base. The upper rim 1 and lower rim 2 are used to support the tire 4 within the center rings 41 on both sides, thereby positioning and sealing the tire 4. An air outlet pipe 11 is fixedly connected to the side of the upper rim 1 away from the lower rim 2. An air inlet pipe 21 is fixedly connected to the lower rim 2, and a fan 22 is connected to the air inlet pipe 21. An external circulation pipe 12 is fixedly connected to the air outlet pipe 11, and the two ends of the external circulation pipe 12 are respectively connected to... The intake pipe 21 and the exhaust pipe 11 are connected. An electric heating mechanism 3 is installed in the intake pipe 21. The electric heating mechanism 3 is used to heat the airflow entering the tire 4. An air hole (not shown in the figure) is opened on the intake pipe 21. The air hole is used to fill and release air into the intake pipe 21. The gas filled in can be air or inert gas such as nitrogen. The electric heating mechanism 3 is used to heat the gas in the tire 4. The fan 22 makes the hot gas circulate in the intake pipe 21, the tire 4, the exhaust pipe 11 and the external circulation pipe 12. When the hot gas heats the tire 4 to a suitable temperature, the dent repair of the tire 4 is completed.

[0042] Reference Figure 2 and Figure 3 A sealing groove 13 is provided on the upper rim 1. The sealing groove 13 facilitates the insertion of the upper rim 1 into the tire 4. On the one hand, it increases the contact area between the upper rim 1 and the tire 4, making the fixation of the tire 4 more stable. On the other hand, it provides a better sealing effect for the tire 4. A baffle 14 is connected to the bottom of the upper rim 1. Multiple positioning rods 15 are fixedly connected to the baffle 14. The positioning rods 15 are evenly distributed along the circumference of the baffle 14. The positioning rods 15 fix the baffle 14 and the upper rim 1, and leave a gap between the baffle 14 and the upper rim 1 for airflow to pass through. The air outlet pipe 11 extends into the gap between the baffle 14 and the upper rim 1. The airflow in the tire 4 enters the gap and finally flows into the external circulation pipe 12 through the air outlet pipe 11.

[0043] A sealing groove 23 is provided on the lower rim 2. The sealing groove 23 facilitates the insertion of the lower rim 2 into the tire 4. On the one hand, it increases the contact area between the lower rim 2 and the tire 4, making the fixation of the tire 4 more stable. On the other hand, it improves the sealing effect of the tire 4. A guide plate 24 is provided on the side of the lower rim 2 that is inserted into the tire 4. Multiple support rods 25 are evenly arranged around the guide plate 24. The support rods 25 fix the guide plate 24 to the lower rim 2, so that a gap is formed between the guide pipe and the lower rim 2 for airflow to pass through. The end of the air intake pipe 21 passes through the lower rim 2 and extends into the gap between the guide plate 24 and the lower rim 2. The guide plate 24 can block the airflow introduced by the air intake pipe 21, so that the airflow is guided towards the inner wall of the tire 4 along the periphery of the guide plate 24, and the airflow flows upward along the inner wall of the tire 4. Finally, the airflow flows into the baffle plate 14 and the air outlet pipe 11 through the inner wall, realizing the circulation of airflow.

[0044] The electric heating mechanism 3 includes a positioning cylinder 31 fixedly connected to the air intake pipe 21. The axial direction of the positioning cylinder 31 is the same as that of the air intake pipe 21. Both ends of the positioning cylinder 31 are open. A fixed cylinder 32 is fixedly connected inside the positioning cylinder 31. The fixed cylinder 32 and the positioning cylinder 31 are concentrically arranged. Both ends of the fixed cylinder 32 are open. The diameter of the fixed cylinder 32 is smaller than that of the positioning cylinder 31, so that a channel is left between the fixed cylinder 32 and the positioning cylinder 31. A protruding flange 321 is fixed at one end of the fixed cylinder 32 near the lower rim 2. The protruding flange 321 is folded outward and fixedly connected to the inner wall of the positioning cylinder 31, blocking the channel between the fixed cylinder 32 and the positioning cylinder 31, so that the airflow flows through the fixed cylinder 32.

[0045] An electromagnetic coil 33, made of copper wire, is wound around the outer wall of the fixed cylinder 32. A fixed post 34 is connected inside the fixed cylinder 32, located at the center of the fixed cylinder 32. Multiple guide plates 35 are fixedly connected to the outer wall of the fixed post 34. The guide plates 35 are evenly distributed around the circumference of the fixed post 34, and the length direction of the guide plates 35 is the same as the axial direction of the fixed post 34. The side of the guide plates 35 away from the fixed post 34 is fixed inside the fixed cylinder 32, thus fixing the fixed post 34 and the fixed cylinder 32. Both the fixed post 34 and the guide plates 35 are made of metal. When an alternating current is applied to the electromagnetic coil 33, the alternating current generates an alternating magnetic field, causing eddy currents inside the metal guide plates 35, thereby rapidly heating the guide plates 35. The electromagnetic coil 33 heating has the effect of fast heating speed, which can make the workpiece reach the required temperature in a very short time. The bottom of the fixed column 34 is fixedly connected to a conical part 341. The diameter of the conical part 341 increases from bottom to top. The conical part 341 can divert the gas, so that the gas can pass through the guide vanes 35 evenly.

[0046] When the blower 22 operates, it generates negative pressure, causing gas to pass through the fixed cylinder 32. The guide vane 35 heats the gas, and the hot gas is blocked by the guide plate 24, which guides the airflow along the periphery of the guide plate 24 towards the inner wall of the tire 4. The airflow then flows upward along the inner wall of the tire 4. The cold gas inside the tire 4 enters the exhaust pipe 11 through the gap between the baffle plate 14 and the upper rim 1, and then flows back to the intake pipe 21 through the external circulation pipe 12. After being heated by the guide vane 35, it circulates back into the tire 4, realizing the external circulation of hot gas between the tire 4, the exhaust pipe 11, the external circulation pipe 12, and the intake pipe 21. The guide vane 35 continuously heats the gas, and after the hot gas heats the tire 4 to a suitable temperature, the dent in the tire 4 is automatically repaired.

[0047] The implementation principle of the external circulation repair device for tire dents in Embodiment 1 of this application is as follows: The tire 4 is placed on the lower rim 2, with the lower rim 2 inserted into the tire 4. The upper mold base moves downwards, causing the upper rim 1 to be inserted into the tire 4. The upper rim 1 and lower rim 2 are respectively inserted into the center ring 41 of the tire 4, fixing and sealing the tire 4, thus connecting the tire 4 to the inlet pipe 21 and the outlet pipe 11. Then, appropriate gas is injected into the inlet pipe 21. Next, the electromagnetic coil 33 is controlled to operate, heating the guide vane 35. The fan 22 generates negative pressure in the inlet pipe 21, causing the gas to pass through the fixed cylinder 32. The flow vane 35 heats the gas, and the hot gas is blocked by the guide plate 24, which guides the airflow along the periphery of the guide plate 24 towards the inner wall of the tire 4, causing the airflow to flow upward along the inner wall of the tire 4. The cold gas inside the tire 4 enters the exhaust pipe 11 through the gap between the baffle plate 14 and the upper rim 1, and then flows back to the intake pipe 21 through the external circulation pipe 12. After being heated by the flow vane 35, it circulates back into the tire 4, realizing the external circulation of hot gas between the tire 4, the exhaust pipe 11, the external circulation pipe 12 and the intake pipe 21. The flow vane 35 continuously heats the gas, and after the hot gas heats the tire 4 to a suitable temperature, the dent in the tire 4 is automatically repaired.

[0048] Example 2:

[0049] This application discloses a tire dent repair device via external circulation in Embodiment 2, which differs from Embodiment 1 in that, referring to... Figure 4 and Figure 5 First, no baffle 14 is provided on the upper rim 1, and the bottom of the upper rim 1 is tapered, which facilitates the guidance of gas from the middle of the upper rim 1 to the periphery of the tire 4, so that the airflow flows downward along the side wall of the tire 4, thereby making the airflow and the inner wall of the tire 4 in close contact, which facilitates the heating of the tire 4 by the hot gas; multiple guide rods 16 are fixedly connected on the upper rim 1, and the guide rods 16 are evenly distributed radially from the center of the upper rim 1 to the edge. The guide rods 16 evenly divide the airflow, so that the airflow flows evenly along the side wall of the tire 4.

[0050] Reference Figure 5 and Figure 6 Secondly, the intake pipe 21 passes through the gap between the lower rim 2 and the guide plate 24 and exits from the middle of the guide plate 24. Multiple exhaust pipes 11 are fixedly connected to the lower rim 2. The exhaust pipes 11 pass through the lower rim 2 and extend into the gap between the lower rim 2 and the guide plate 24. The figure shows four exhaust pipes 11, but it is not limited to four. The ends of the four exhaust pipes 11 away from the lower rim 2 are all connected to the external circulation pipe 12, thereby realizing the return of airflow.

[0051] When the blower 22 operates, it generates negative pressure, causing gas to pass through the fixed cylinder 32. The guide vane 35 heats the gas, and the hot gas enters the tire 4 from the center of the guide plate 24. Under the guidance of the upper rim 1, the hot gas flows downward along the inner wall of the tire 4. The cold gas in the tire 4 enters the exhaust pipe 11 through the gap between the lower rim 2 and the guide plate 24, and then flows back to the intake pipe 21 through the external circulation pipe 12. After being heated by the guide vane 35, it circulates back into the tire 4, realizing the external circulation of hot gas between the tire 4, the exhaust pipe 11, the external circulation pipe 12, and the intake pipe 21. The guide vane 35 continuously heats the gas, and after the hot gas heats the tire 4 to a suitable temperature, the dent in the tire 4 is automatically repaired.

[0052] The implementation principle of the external circulation repair device for tire dents in Embodiment 1 of this application is as follows: The tire 4 is placed on the lower rim 2, with the lower rim 2 inserted into the tire 4. The upper mold base moves downwards, causing the upper rim 1 to be inserted into the tire 4. The upper rim 1 and lower rim 2 are respectively inserted into the center ring 41 of the tire 4, fixing and sealing the tire 4, thus connecting the tire 4 to the inlet pipe 21 and the outlet pipe 11. Then, appropriate gas is injected into the inlet pipe 21. Next, the electromagnetic coil 33 is controlled to operate, heating the guide vane 35. The fan 22 generates negative pressure in the inlet pipe 21, causing the gas to pass through the fixed cylinder 32. The flow vane 35 heats the gas, and the hot gas enters the tire 4 from the center of the guide plate 24. Under the guidance of the upper rim 1, the hot gas flows downward along the inner wall of the tire 4. The cold gas in the tire 4 enters the exhaust pipe 11 through the gap between the lower rim 2 and the guide plate 24, and then flows back to the intake pipe 21 through the external circulation pipe 12. After being heated by the flow vane 35, it circulates back into the tire 4, realizing the external circulation of hot gas between the tire 4, the exhaust pipe 11, the external circulation pipe 12 and the intake pipe 21. The flow vane 35 continuously heats the gas, and after the hot gas heats the tire 4 to a suitable temperature, the dent in the tire 4 is automatically repaired.

[0053] Example 3:

[0054] This application discloses an external circulation repair device for tire dents in Embodiment 3. The electric heating mechanism 3 in Embodiment 3 includes all electric heating methods, and is not limited to the induction heating disclosed in Embodiments 1 and 2. It can also be resistance heating, electric heating tube, electric arc heating, electron beam heating, infrared heating and medium heating, etc., which will not be listed here.

[0055] Example 4:

[0056] Embodiment 4 of this application discloses a method for repairing tire dents using an external circulation repair device. This repair method is mainly applied to the tire dent repair devices disclosed in Embodiments 1, 2, and 3 above, and includes the following steps:

[0057] S1. Positioning and sealing: Place the tire 4 inside the tire forming machine, so that the center ring 41 on one side of the tire 4 is engaged with the lower rim 2, and the upper rim 1 moves downward and is inserted into the center ring 41 on the other side of the tire 4. The sealing groove 13 on the upper rim 1 and the sealing groove 23 on the lower rim 2 are engaged with the two sides of the tire 4 respectively, fixing and sealing the tire 4.

[0058] S2. Inflation: Connect the air source to the air hole on the air intake pipe 21 and inflate the air intake pipe 21 and the tire 4 with a certain amount of air pressure.

[0059] S3. Gas Circulation: Control the operation of the fan 22. The negative pressure generated by the fan 22 causes the gas in the intake pipe 21 to flow into the tire 4 through the fixed cylinder 32. At the same time, the gas in the tire 4 enters the external circulation pipe 12 through the exhaust pipe 11, and finally enters the fixed cylinder 32 again through the intake pipe 21, realizing the circulation of gas in the tire 4, exhaust pipe 11, external circulation pipe 12 and intake pipe 21.

[0060] S4. Heating to repair dents: Control the operation of the electric heating mechanism 3 to heat the gas passing through the intake pipe 21. The gas circulates in the intake pipe 21, the tire 4 exhaust pipe 11 and the external circulation pipe 12. The electric heating mechanism 3 continuously heats the gas. The hot gas can heat the tire 4 to a suitable temperature and then automatically repair the dent of the tire 4.

[0061] S5. Exhausting: After the tire 4 is repaired, the inflation source is separated from the air hole, and the gas in the tire 4 and the positioning cylinder 31 is discharged outward through the air hole, which facilitates the separation of the tire 4 from the upper rim 1 and the lower rim 2.

[0062] S6. Disassembly: The air inside the tire 4 is discharged outward, and the upper rim 1 is controlled to move upward until it is separated from the tire 4. Then the tire 4 is removed from the lower rim 2, so that the repaired tire 4 can be removed from the tire forming machine.

[0063] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A repair method using an external circulation repair device for tire dents, characterized in that: The external circulation repair device for tire dents includes an upper rim (1) and a lower rim (2) mounted on a tire shaping machine. The upper rim (1) and the lower rim (2) are used to insert into the center rings (41) on both sides of the tire (4) to position and seal the tire (4). An air inlet pipe (21) is fixedly connected to the lower rim (2), and a fan (22) is connected to the air inlet pipe (21); An air outlet pipe (11) is fixedly connected to the side of the upper rim (1) away from the lower rim (2). An external circulation pipe (12) is fixedly connected to the air outlet pipe (11). The two ends of the external circulation pipe (12) are connected to the air inlet pipe (21) and the air outlet pipe (11) respectively. The bottom of the upper rim (1) is connected to a baffle (14), and a positioning rod (15) is fixedly connected to the baffle (14) to fix the baffle (14) and the upper rim (1). A gap is left between the baffle (14) and the upper rim (1) for airflow to pass through, and the air outlet pipe (11) extends into the gap between the baffle (14) and the upper rim (1). The lower rim (2) is inserted into the tire (4) and a guide plate (24) is provided on one side. The guide plate (24) is provided with a support rod (25) to fix the guide plate (24) and the lower rim (2). A gap is formed between the guide plate (24) and the lower rim (2) for airflow to pass through. The end of the air intake pipe (21) passes through the lower rim (2) and extends into the gap between the guide plate (24) and the lower rim (2), so that the airflow is transmitted from bottom to top along the inner wall of the tire (4) to heat the inner wall of the tire (4). An electric heating mechanism (3) is provided inside the air intake pipe (21). The electric heating mechanism (3) is used to heat the airflow entering the tire (4). An air hole is provided on the air intake pipe (21) for inflating and deflating the air into the air intake pipe (21), so that hot gas can circulate between the tire (4), the air outlet pipe (11), the external circulation pipe (12) and the air intake pipe (21). The electric heating mechanism (3) includes a positioning cylinder (31) fixedly connected to the air inlet pipe (21), a fixed cylinder (32) fixedly connected inside the positioning cylinder (31), the fixed cylinder (32) and the positioning cylinder (31) are concentrically arranged, both ends of the positioning cylinder (31) and the fixed cylinder (32) are open, an electromagnetic coil (33) is wound around the outer wall of the fixed cylinder (32), a fixed column (34) is connected inside the fixed cylinder (32), a number of guide vanes (35) are fixedly connected to the outer wall of the fixed column (34), the guide vanes (35) are evenly distributed along the circumference of the fixed column (34), and both the fixed column (34) and the guide vanes (35) are made of metal. The repair method includes the following steps: S1. Positioning and sealing: Place the tire (4) in the tire shaping machine, so that the center ring (41) on one side of the tire (4) is engaged with the lower rim (2), the upper rim (1) moves downward and is inserted into the center ring (41) on the other side of the tire (4), and the sealing groove 1 (13) on the upper rim (1) and the sealing groove 2 (23) on the lower rim (2) are engaged with the two sides of the tire (4) respectively. S2, Inflate: Connect the air source to the air hole on the air intake pipe (21) and inflate the air intake pipe (21) and the tire (4) with a certain amount of appropriate air pressure; S3, Gas Circulation: Control the operation of the fan (22). The negative pressure generated by the fan (22) causes the gas in the inlet pipe (21) to flow into the tire (4) through the fixed cylinder (32). At the same time, the gas in the tire (4) enters the external circulation pipe (12) through the outlet pipe (11), and finally enters the fixed cylinder (32) again through the inlet pipe (21), realizing the circulation of gas in the tire (4), outlet pipe (11), external circulation pipe (12) and inlet pipe (21); S4. Heating to repair dents: Control the operation of the electric heating mechanism (3) to heat the gas passing through the intake pipe (21). The gas circulates in the intake pipe (21), tire (4), exhaust pipe (11) and external circulation pipe (12). The electric heating mechanism (3) continuously heats the gas. The hot gas can heat the tire (4) to a suitable temperature and then automatically repair the dent in the tire (4). S5, Exhaust: After the tire (4) is repaired, the inflation source is separated from the air hole, and the gas in the tire (4) and positioning cylinder (31) is discharged outward through the air hole, which facilitates the separation of the tire (4) from the upper rim (1) and the lower rim (2). S6. Disassembly: The gas inside the tire (4) is discharged outward. The upper rim (1) is controlled to move upward until it is separated from the tire (4). Then the tire (4) is removed from the lower rim (2) to remove the repaired tire (4) from the tire shaping machine.

2. A repair method using an external circulation repair device for tire dents, characterized in that: The external circulation repair device for tire dents includes an upper rim (1) and a lower rim (2) mounted on a tire shaping machine. The upper rim (1) and the lower rim (2) are used to insert into the center rings (41) on both sides of the tire (4) to position and seal the tire (4). An air inlet pipe (21) is fixedly connected to the lower rim (2), and a fan (22) is connected to the air inlet pipe (21); An air outlet pipe (11) is fixedly connected to one side of the lower rim (2), and an external circulation pipe (12) is fixedly connected to the air outlet pipe (11). The two ends of the external circulation pipe (12) are connected to the air inlet pipe (21) and the air outlet pipe (11) respectively. The bottom of the upper rim (1) is tapered, and multiple guide rods (16) are fixedly connected to the upper rim (1). The guide rods (16) are evenly distributed radially from the center to the edge of the upper rim (1). The air intake pipe (21) passes through the middle of the guide plate (24), and the air outlet pipe (11) fixedly connected to the lower rim (2) consists of multiple pipes. The air outlet pipe (11) passes through the lower rim (2) and extends into the gap between the lower rim (2) and the guide plate (24), so as to realize the airflow is transmitted from top to bottom along the inner wall of the tire (4) to heat the inner wall of the tire (4); An electric heating mechanism (3) is provided inside the air intake pipe (21). The electric heating mechanism (3) is used to heat the airflow entering the tire (4). An air hole is provided on the air intake pipe (21) for inflating and deflating the air into the air intake pipe (21), so that hot gas can circulate between the tire (4), the air outlet pipe (11), the external circulation pipe (12) and the air intake pipe (21). The electric heating mechanism (3) includes a positioning cylinder (31) fixedly connected to the air inlet pipe (21), a fixed cylinder (32) fixedly connected inside the positioning cylinder (31), the fixed cylinder (32) and the positioning cylinder (31) are concentrically arranged, both ends of the positioning cylinder (31) and the fixed cylinder (32) are open, an electromagnetic coil (33) is wound around the outer wall of the fixed cylinder (32), a fixed column (34) is connected inside the fixed cylinder (32), a number of guide vanes (35) are fixedly connected to the outer wall of the fixed column (34), the guide vanes (35) are evenly distributed along the circumference of the fixed column (34), and both the fixed column (34) and the guide vanes (35) are made of metal. The repair method includes the following steps: S1. Positioning and sealing: Place the tire (4) in the tire shaping machine, so that the center ring (41) on one side of the tire (4) is engaged with the lower rim (2), the upper rim (1) moves downward and is inserted into the center ring (41) on the other side of the tire (4), and the sealing groove 1 (13) on the upper rim (1) and the sealing groove 2 (23) on the lower rim (2) are engaged with the two sides of the tire (4) respectively. S2, Inflate: Connect the air source to the air hole on the air intake pipe (21) and inflate the air intake pipe (21) and the tire (4) with a certain amount of appropriate air pressure; S3, Gas Circulation: Control the operation of the fan (22). The negative pressure generated by the fan (22) causes the gas in the inlet pipe (21) to flow into the tire (4) through the fixed cylinder (32). At the same time, the gas in the tire (4) enters the external circulation pipe (12) through the outlet pipe (11), and finally enters the fixed cylinder (32) again through the inlet pipe (21), realizing the circulation of gas in the tire (4), outlet pipe (11), external circulation pipe (12) and inlet pipe (21); S4. Heating to repair dents: Control the operation of the electric heating mechanism (3) to heat the gas passing through the intake pipe (21). The gas circulates in the intake pipe (21), tire (4), exhaust pipe (11) and external circulation pipe (12). The electric heating mechanism (3) continuously heats the gas. The hot gas can heat the tire (4) to a suitable temperature and then automatically repair the dent in the tire (4). S5, Exhaust: After the tire (4) is repaired, the inflation source is separated from the air hole, and the gas in the tire (4) and positioning cylinder (31) is discharged outward through the air hole, which facilitates the separation of the tire (4) from the upper rim (1) and the lower rim (2). S6. Disassembly: The gas inside the tire (4) is discharged outward. The upper rim (1) is controlled to move upward until it is separated from the tire (4). Then the tire (4) is removed from the lower rim (2) to remove the repaired tire (4) from the tire shaping machine.

3. A repair method using an external circulation repair device for tire dents according to claim 1 or 2, characterized in that: The bottom of the fixed column (34) is fixedly connected to a tapered part (341), and the diameter of the tapered part (341) increases from bottom to top.

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