Method for vulcanizing by using internal pressure pipeline of tire vulcanizing machine

Abstract

The invention relates to a method for vulcanizing by using an internal pressure pipeline of a tire vulcanizing machine, and belongs to the field of tire vulcanizing equipment. The steam inlet self-control valve is opened and kept for a certain time, the steam is controlled to enter the capsule, and the condensate water is discharged by the condensate water discharging self-control valve; the steam inlet self-control valve and the condensate water discharge self-control valve are closed, meanwhile, the primary hot water inlet self-control valve is opened and kept for a certain time, and the capsule is filled with hot water; the primary hot water inlet self-control valve is closed, and the circulating hot water inlet self-control valve and the hot water circulating outlet self-control valve are opened for hot water circulation; the circulating hot water inlet self-control valve and the hot water circulating outlet self-control valve are closed, and the recycling self-control valve is opened to recycle hot water in the capsule; the recovery self-control valve is closed, and the zero-pressure discharge self-control valve is opened to empty the capsule; and closing the zero-pressure discharge self-control valve, opening the inlet end selection three-way self-control valve, the inlet end vacuumizing self-control valve, the outlet end selection three-way valve and the outlet end vacuumizing self-control valve, and discharging the tire until the pressure in the capsule is reduced to a value allowing tire discharging.

Description

Technical Field

[0001] The present invention relates to the field of tire vulcanization equipment, and more specifically, to a method for vulcanization using the internal pressure pipeline in a tire vulcanizer. Background Art

[0002] As is well known, during the vulcanization process of tires, leakage of various valves will lead to problems in aspects such as tire quality and energy consumption. The main manifestations are as follows: When filling high-pressure medium (hot water or nitrogen) in the internal pressure, if the normally closed internal pressure steam inlet control valve leaks internally, it may cause the high-pressure medium to flow reversely into the internal pressure steam main pipeline, seriously affecting the steam quality in the internal pressure steam main pipeline, and thus resulting in a batch of defective tires in other vulcanizers; When performing internal pressure vacuum pumping, if the internal pressure steam inlet control valve or the high-pressure medium inlet control valve leaks internally, there is a risk that the pressure in the internal pressure steam main pipeline or the high-pressure medium main pipeline is reduced by the vacuum system, leading to a batch of defective tires; And when performing internal pressure vacuum pumping, if any control valve in the internal pressure pipeline system leaks internally, it will affect the vacuum pumping effect. To avoid these impacts, usually, a check valve is set or an additional control valve is set. When the relevant control valve leaks internally, the probability of reverse flow of the medium is reduced. However, whether it is a control valve or a check valve, internal leakage may occur due to damage of internal components or jamming of internal components by debris.

[0003] On the other hand, during the stage of pressure recovery of the internal pressure medium after vulcanization is completed, if it is necessary to increase the recovery amount, it is necessary to increase the flow rate. For the hot water vulcanization process using hot water as the high-pressure medium, increasing the flow rate during the hot water recovery, evacuation, and vacuum pumping stages, although it helps to overcome the slow zeroing of the internal pressure caused by continuous vaporization of hot water, will lead to the problem of delayed mold opening. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a method for vulcanization using the internal pressure pipeline in a tire vulcanizer, which not only avoids the mutual influence of various media, but also solves the problem of slow zeroing of the internal pressure caused by continuous vaporization of hot water in the hot water vulcanization process, thereby avoiding the problem of delayed mold opening.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a method for vulcanizing by using the internal pressure pipeline of a tire vulcanizer, a steam inlet automatic control valve, a primary hot water inlet automatic control valve, a circulating hot water inlet automatic control valve, and an inlet vacuum automatic control valve are arranged on the inlet pipeline of the central mechanism, an inlet selection three-way automatic control valve is arranged at the intersection of the collecting pipeline of the steam inlet automatic control valve, the primary hot water inlet automatic control valve, the circulating hot water inlet automatic control valve and the branch pipeline where the inlet vacuum automatic control valve is located, and the other end of the inlet selection three-way automatic control valve is connected to the inlet of the central mechanism through the inlet pipeline; an outlet vacuum automatic control valve is arranged at the outlet of the central mechanism. The vacuum automatic control valve, hot water circulation outlet automatic control valve, recovery automatic control valve, zero pressure discharge automatic control valve, main discharge automatic control valve, condensate discharge automatic control valve, an outlet selection three-way valve is installed at the intersection of the collecting pipeline of the hot water circulation outlet automatic control valve, recovery automatic control valve, zero pressure discharge automatic control valve, main discharge automatic control valve, condensate discharge automatic control valve and the branch pipeline where the outlet vacuum automatic control valve is located, and the other end of the outlet selection three-way valve is connected to the outlet of the central mechanism through the outlet pipeline; the inlet vacuum automatic control valve, the outlet vacuum automatic control valve, the recovery automatic control valve, the zero pressure discharge automatic control valve, the main discharge automatic control valve, and the condensate discharge automatic control valve are connected to the outlet of the central mechanism; A positive Tesla valve is arranged at the rear and in front of the steam inlet automatic control valve according to the medium direction, and is characterized in that the vulcanization steps are as follows: step one, the steam inlet automatic control valve is opened and maintained for a certain time according to the process to control the steam to enter the capsule, during which the condensate is discharged by the condensate discharge automatic control valve; step two, the steam inlet automatic control valve and the condensate discharge automatic control valve are closed, and at the same time, the primary hot water inlet automatic control valve is opened and maintained for a certain time according to the process to fill the capsule with hot water; step three, the primary hot water inlet automatic control valve is closed, and the circulating hot water inlet automatic control valve and the hot water circulation outlet automatic control valve are opened and maintained for a certain time according to the process. The hot water is circulated for a certain period of time; Step 4, close the circulating hot water inlet automatic control valve and the hot water circulation outlet automatic control valve, open the recovery automatic control valve and keep it for a certain period of time according to the process, and recycle the hot water in the capsule; Step 5, close the recovery automatic control valve, open the zero-pressure discharge automatic control valve and keep it for a certain period of time according to the process to empty the capsule; Step 6, close the zero-pressure discharge automatic control valve, open the inlet selection three-way automatic control valve, the inlet vacuum automatic control valve, the outlet selection three-way valve, and the outlet vacuum automatic control valve, until the pressure in the capsule is reduced to a value allowing tire discharge, and then discharge the tire.

[0006] After the tire is released, a green tire is loaded for another vulcanization process. In the non-vulcanization state, the main discharge automatic control valve remains normally open to ensure that once there is pressure in the bladder, it is discharged to zero.

[0007] The inlet end vacuum automatic control valve is arranged at a port of the inlet end selection three-way automatic control valve which is never communicated with other medium pipelines.

[0008] The outlet vacuum automatic control valve is arranged at a port of the outlet selection three-way automatic control valve which is never communicated with other medium pipelines.

[0009] The beneficial effects of the present invention are that it can accelerate the recycling, discharging, and vacuum pumping speeds and avoid the mutual influence of various media. Brief Description of the Drawings

[0010] The present invention will be further described below in conjunction with the drawings and embodiments.

[0011] Figure 1 Structural schematic diagram of the present invention.

[0012] In the figure, 1. Central mechanism, 2. Steam inlet automatic control valve, 3. Primary hot water inlet automatic control valve, 4. Circulating hot water inlet automatic control valve, 5. Inlet end vacuum pumping automatic control valve, 6. Inlet end selection three-way automatic control valve, 7. Outlet end selection three-way automatic control valve, 8. Outlet end vacuum pumping automatic control valve, 9. Hot water circulation outlet automatic control valve, 10. Recycling automatic control valve, 11. Zero-pressure discharge automatic control valve, 12. Main discharge automatic control valve, 13. Condensate discharge automatic control valve, 14. Tesla valve. Detailed Embodiment

[0013] In the figure, the present invention is provided with a central mechanism 1. At the inlet pipeline of the central mechanism 1, a steam inlet automatic control valve 2, a primary hot water inlet automatic control valve 3, a circulating hot water inlet automatic control valve 4, and an inlet end vacuum pumping automatic control valve 5 are arranged. An inlet end selection three-way automatic control valve 6 is arranged at the intersection of the converging pipeline of the steam inlet automatic control valve 2, the primary hot water inlet automatic control valve 3, and the circulating hot water inlet automatic control valve 4 and the branch pipeline where the inlet end vacuum pumping automatic control valve 5 is located. The other end of the inlet end selection three-way automatic control valve 6 is connected to the inlet of the central mechanism 1 through an inlet pipeline; at the outlet of the central mechanism 1, an outlet end vacuum pumping automatic control valve 8, a hot water circulation outlet automatic control valve 9, a recycling automatic control valve 10, a zero-pressure discharge automatic control valve 11, a main discharge automatic control valve 12, and a condensate discharge automatic control valve 13 are arranged. An outlet end selection three-way valve 7 is arranged at the intersection of the converging pipeline of the hot water circulation outlet automatic control valve 9, the recycling automatic control valve 10, the zero-pressure discharge automatic control valve 11, the main discharge automatic control valve 12, and the condensate discharge automatic control valve 13 and the branch pipeline where the outlet end vacuum pumping automatic control valve 8 is located. The other end of the outlet end selection three-way valve 7 is connected to the outlet of the central mechanism 1 through an outlet pipeline; behind the inlet end vacuum pumping automatic control valve 5, the outlet end vacuum pumping automatic control valve 8, the recycling automatic control valve 10, the zero-pressure discharge automatic control valve 11, the main discharge automatic control valve 12, and the condensate discharge automatic control valve 13, and in front of the steam inlet automatic control valve 2, a forward Tesla valve 14 is arranged in the direction of the medium.

[0014] The inlet end vacuum pumping automatic control valve 5 is arranged at the port of the inlet end selection three-way automatic control valve 6 that is never communicated with other medium pipelines, and the outlet end vacuum pumping automatic control valve 8 is arranged at the port of the outlet end selection three-way automatic control valve 7 that is never communicated with other medium pipelines.

[0015] During the steam inlet stage, under the action of the forward Tesla valve 14, the flow rate of steam entering the capsule is faster than that of the original technology, and the condensed water will be discharged quickly; during the primary hot water inlet and hot water circulation stage, the Tesla valve 14 of the steam inlet branch line can prevent hot water from entering the steam pipeline; during normal recovery, discharge, and vacuuming, the Tesla valve plays a positive acceleration role, and the Tesla valves set in the recovery branch line, zero-pressure discharge branch line, main discharge branch line, and condensate discharge branch line can also play a check role.

[0016] This embodiment adopts a hot water vulcanization process, and the following process steps are performed during each vulcanization process: Step 1, the steam inlet automatic control valve 2 is opened and maintained for a certain time according to the process, and the steam is controlled to enter the capsule through the central mechanism 1. During this period, the condensate discharge automatic control valve 13 is used to discharge the condensate; Step 2, the steam inlet automatic control valve 2 and the condensate discharge automatic control valve 13 are closed, and at the same time, the primary hot water inlet automatic control valve 3 is opened and maintained for a certain time according to the process, and hot water is filled into the capsule; Step 3, the primary hot water inlet automatic control valve 3 is closed, and at the same time, the circulating hot water inlet automatic control valve 4 and the hot water circulation outlet automatic control valve 9 are opened and maintained for a certain time according to the process. Hot water circulation; Step 4, close the circulating hot water inlet automatic control valve 4 and the hot water circulation outlet automatic control valve 9, open the recovery automatic control valve 10 and keep it for a certain time according to the process to recycle the hot water in the capsule; Step 5, close the recovery automatic control valve 10, open the zero-pressure discharge automatic control valve 11 and keep it for a certain time according to the process to empty the capsule; Step 6, close the zero-pressure discharge automatic control valve 11, open the inlet selection three-way automatic control valve 6, the inlet vacuum automatic control valve 5, and the outlet selection three-way valve 7, the outlet vacuum automatic control valve 8, until the pressure in the capsule is reduced to a value that allows tire discharge, and then discharge. After the tire is discharged, the green tire is loaded and the above steps are performed again to carry out another vulcanization process. In the non-vulcanization state, the main discharge automatic control valve 12 remains normally open to ensure that once there is pressure in the capsule, it is discharged to zero.

[0017] In the above step 1, under the action of the forward Tesla valve 14, the pressure rise rate in the capsule is faster than that of the original technology, until the pressure in the capsule is the same as the steam source pressure, and the condensed water will be discharged quickly; in step 2 and step 3, during the opening of the primary hot water inlet automatic valve 3 or the circulating hot water inlet automatic valve 4, if the steam inlet automatic valve 2 has an internal leakage, since the hot water pressure is higher than the steam, it tends to flow to the steam branch pipeline, but for hot water flowing in this direction, the Tesla valve of the steam inlet branch pipeline plays a reverse stop (check) role; similarly, the remaining Tesla valves play a positive acceleration role during normal recovery, discharge, and vacuuming. Once the recovery automatic valve 10, the zero-pressure discharge automatic valve 11, the main discharge automatic valve 12, and the condensed water discharge automatic valve 13 have an internal leakage, the Tesla valve of the branch pipeline where they are located will play a reverse stop (check) role.

[0018] The Tesla valve adopted in this embodiment is formed by bending and welding pipelines. It has no moving parts inside, is of low cost, and will not fail due to the influence of sundries like ordinary check valves when performing the check function.

[0019] The present invention adopts a Tesla valve with low cost, which not only accelerates the flow rate of relevant branch pipes, increases the recovery amount of internal pressure medium, and accelerates the return of internal pressure to zero, but also can achieve an effective check effect; by setting a three-way valve at the intersection of the branch pipe where the vacuum pumping self-control valve is located and the pipeline after the convergence of other self-control valves, the probability of mutual influence between vacuum pumping and other media is reduced. Thereby reducing defective products and solving the problem of delayed mold opening caused by slow return of internal pressure in the vulcanizer.

Claims

1. A method for vulcanizing by using the internal pressure pipeline of a tire vulcanizer, wherein a steam inlet automatic control valve, a primary hot water inlet automatic control valve, a circulating hot water inlet automatic control valve, and an inlet vacuum automatic control valve are arranged at the inlet pipeline of a central mechanism, and an inlet selection three-way automatic control valve is arranged at the intersection of the collecting pipeline of the steam inlet automatic control valve, the primary hot water inlet automatic control valve, the circulating hot water inlet automatic control valve and the branch pipeline where the inlet vacuum automatic control valve is located, and the other end of the inlet selection three-way automatic control valve is connected to the inlet of the central mechanism through the inlet pipeline; an outlet vacuum automatic control valve, a hot water circulation outlet automatic control valve, a recovery automatic control valve, and a zero-pressure discharge automatic control valve are arranged at the outlet of the central mechanism. Valve, main discharge automatic control valve, condensate discharge automatic control valve, an outlet selection three-way valve is arranged at the intersection of the collecting pipeline of the hot water circulation outlet automatic control valve, the recovery automatic control valve, the zero-pressure discharge automatic control valve, the main discharge automatic control valve, the condensate discharge automatic control valve and the branch pipeline where the outlet vacuum automatic control valve is located, and the other end of the outlet selection three-way valve is connected to the outlet of the central mechanism through the outlet pipeline; positive Tesla valves are arranged in the direction of the medium behind the inlet vacuum automatic control valve, the outlet vacuum automatic control valve, the recovery automatic control valve, the zero-pressure discharge automatic control valve, the main discharge automatic control valve, the condensate discharge automatic control valve, and in front of the steam inlet automatic control valve, which is characterized by: The vulcanization steps are as follows: Step 1, the steam inlet automatic control valve is opened and maintained for a certain time according to the process, and the steam is controlled to enter the capsule. During this period, the condensate discharge automatic control valve is used to discharge the condensate; Step 2, the steam inlet automatic control valve and the condensate discharge automatic control valve are closed, and at the same time, the primary hot water inlet automatic control valve is opened and maintained for a certain time according to the process, and hot water is filled into the capsule; Step 3, the primary hot water inlet automatic control valve is closed, and at the same time, the circulating hot water inlet automatic control valve and the hot water circulation outlet automatic control valve are opened and maintained for a certain time according to the process to circulate the hot water; Step 4, the circulating hot water inlet automatic control valve and the hot water circulation outlet automatic control valve are closed, and the recovery automatic control valve is opened and maintained for a certain time according to the process to recover the hot water in the capsule; Step 5, the recovery automatic control valve is closed, the zero-pressure discharge automatic control valve is opened and maintained for a certain time according to the process to empty the capsule; Step 6, the zero-pressure discharge automatic control valve is closed, the inlet selection three-way automatic control valve, the inlet vacuum automatic control valve, and the outlet selection three-way valve and the outlet vacuum automatic control valve are opened until the pressure in the capsule is reduced to a value allowing tire discharge, and tire discharge is performed.

2. The method for vulcanizing using the internal pressure pipeline of a tire vulcanizer according to claim 1, characterized in that After the tire is released, a green tire is loaded for another vulcanization process. In the non-vulcanization state, the main discharge automatic control valve remains normally open to ensure that once there is pressure in the bladder, it is discharged to zero.

3. The method for vulcanizing using the internal pressure pipeline of a tire vulcanizer according to claim 1, characterized in that The inlet end vacuum automatic control valve is arranged at a port of the inlet end selection three-way automatic control valve which is never communicated with other medium pipelines.

4. The method for vulcanizing using the internal pressure pipeline of a tire vulcanizer according to claim 1, characterized in that The outlet vacuum automatic control valve is arranged at a port of the outlet selection three-way automatic control valve which is never communicated with other medium pipelines.

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