Internal pressure pipeline of tire vulcanizing machine

Abstract

The utility model relates to an internal pressure pipeline of a tire vulcanizing machine, and belongs to the field of tire vulcanizing equipment. A steam inlet self-control valve, a primary hot water inlet self-control valve, a circulating hot water inlet self-control valve and an inlet end vacuumizing self-control valve are arranged on an inlet end pipeline of the central mechanism, and an inlet end selection three-way self-control valve is arranged at the junction of a collecting pipeline of the steam inlet self-control valve, the primary hot water inlet self-control valve and the circulating hot water inlet self-control valve and a branch pipeline where the inlet end vacuumizing self-control valve is located. An outlet end vacuumizing self-control valve, a hot water circulation outlet self-control valve, a recovery self-control valve, a zero-pressure discharge self-control valve, a main discharge self-control valve and a condensed water discharge self-control valve are arranged at the outlet end of the central mechanism; and an outlet end selection three-way valve is arranged at the junction of a converging pipeline of the hot water circulation outlet self-control valve, the recovery self-control valve, the zero-pressure discharge self-control valve, the main discharge self-control valve and the condensate water discharge self-control valve and a branch pipeline where the outlet end vacuumizing self-control valve is located.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of tire vulcanization equipment, in detail is a tire curing press inner pressure pipeline. BACKGROUND

[0002] It is known that in the vulcanization process of tires, the leakage of various valves will lead to problems in tire quality, energy consumption, etc., mainly manifested in: when the inner pressure is filled with high-pressure medium (hot water or nitrogen), if the inner leakage occurs in the inner pressure steam inlet automatic control valve which has been closed, the high-pressure medium may enter the inner pressure steam main pipeline in reverse, which may seriously affect the steam quality in the inner pressure steam main pipeline, thereby causing batch of waste and substandard tire products in other tire curing machines; when the inner pressure is vacuumized, if the inner leakage occurs in the inner pressure steam inlet automatic control valve or the high-pressure medium inlet automatic control valve, the pressure in the inner pressure steam main pipeline or the high-pressure medium main pipeline will be reduced by the vacuum system, thereby leading to the risk of batch of waste and substandard tire products; and when the inner pressure is vacuumized, if the inner leakage occurs in any automatic control valve in the inner pressure pipeline system, the vacuumization effect will be affected. In order to avoid these influences, it is common to set a check valve or increase the setting of an automatic control valve, so as to reduce the probability of reverse flow of the medium when the related automatic control valve leaks, however, both the automatic control valve and the check valve will lead to inner leakage due to damage of internal components or blockage of internal components by sundries.

[0003] On the other hand, at the end of vulcanization, during the inner pressure medium pressure recovery stage, if the recovery amount needs to be increased, the flow rate needs to be increased. For the hot water vulcanization process using hot water as the high-pressure medium, increasing the flow rate during the hot water recovery, emptying and vacuumization stage, although helps to overcome the slow inner pressure return to zero due to continuous vaporization of hot water, but will lead to the problem of delayed mold opening. SUMMARY

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a tire curing machine inner pressure pipeline, which not only avoids the mutual influence of various media, but also solves the problem of slow inner pressure return to zero due to continuous vaporization of hot water in the hot water vulcanization process, thereby leading to the problem of delayed mold opening.

[0005] The utility model discloses a technical scheme that solves its technical problem is: a tire curing press inner pressure pipeline is equipped with center mechanism, sets up steam inlet automatic control valve, primary hot water inlet automatic control valve, circulating hot water inlet automatic control valve, entry end vacuumizing automatic control valve at center mechanism entry end pipeline, sets up entry end selection three -way automatic control valve at the meeting place of the collecting pipeline of steam inlet automatic control valve, primary hot water inlet automatic control valve, circulating hot water inlet automatic control valve and the branch pipeline of entry end vacuumizing automatic control valve, and the other end of entry end selection three -way automatic control valve is connected with the entry end of center mechanism through entry pipeline, sets up exit end vacuumizing automatic control valve, hot water circulation exit automatic control valve, recovery automatic control valve, zero pressure discharge automatic control valve, main discharge automatic control valve, condensate discharge automatic control valve at center mechanism exit end, sets up exit end selection three -way valve at the meeting place of the collecting pipeline of hot water circulation exit 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 of exit end vacuumizing automatic control valve, and the other end of exit end selection three -way valve is connected with the exit end of center mechanism through exit pipeline, sets up positive tesla valve in the rear of entry end vacuumizing automatic control valve, exit end vacuumizing 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 front of steam inlet automatic control valve respectively according to medium direction.

[0006] The entry end vacuumizing automatic control valve is arranged at the port of the entry end selection three -way automatic control valve that is never communicated with other medium pipelines.

[0007] The exit end vacuumizing automatic control valve is arranged at the port of the exit end selection three -way automatic control valve that is never communicated with other medium pipelines.

[0008] The utility model has the advantages of accelerating the recovery, discharge and vacuumizing speed, and avoiding mutual influence of the media. ACCURACY OF DRAWINGS

[0009] The utility model will be further explained in connection with the drawings and examples.

[0010] Figure 1 The utility model discloses a structure schematic diagram.

[0011] Fig. 1. Center mechanism, 2. Steam inlet automatic control valve, 3. Primary hot water inlet automatic control valve, 4. Circulating hot water inlet automatic control valve, 5. Entry end vacuumizing automatic control valve, 6. Entry end selection three -way automatic control valve, 7. Exit end selection three -way automatic control valve, 8. Exit end vacuumizing automatic control valve, 9. Hot water circulation exit automatic control valve, 10. Recovery 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 DESCRIPTION

[0012] In the figure, the utility model is equipped with center mechanism 1, sets up steam inlet automatic control valve 2, primary hot water inlet automatic control valve 3, circulating hot water inlet automatic control valve 4, inlet end vacuumizing automatic control valve 5 at the inlet pipeline of center mechanism 1, sets up inlet end selection three-way automatic control valve 6 at the confluence pipeline of steam inlet automatic control valve 2, primary hot water inlet automatic control valve 3, circulating hot water inlet automatic control valve 4 and the branch pipeline of inlet end vacuumizing automatic control valve 5, and the other end of inlet end selection three-way automatic control valve 6 is connected with the inlet end of center mechanism 1 through inlet pipeline;Set up outlet end vacuumizing automatic control valve 8, hot water circulating outlet automatic control valve 9, recovery automatic control valve 10, zero pressure discharge automatic control valve 11, main discharge automatic control valve 12, condensate discharge automatic control valve 13 at the outlet end of center mechanism 1, set up outlet end selection three-way valve 7 at the confluence pipeline of hot water circulating outlet automatic control valve 9, recovery automatic control valve 10, zero pressure discharge automatic control valve 11, main discharge automatic control valve 12, condensate discharge automatic control valve 13 and the branch pipeline of outlet end vacuumizing automatic control valve 8, and the other end of outlet end selection three-way valve 7 is connected with the outlet end of center mechanism 1 through outlet pipeline;Set up positive tesla valve 14 in the rear of inlet end vacuumizing automatic control valve 5, outlet end vacuumizing automatic control valve 8, recovery automatic control valve 10, zero pressure discharge automatic control valve 11, main discharge automatic control valve 12, condensate discharge automatic control valve 13 and the front of steam inlet automatic control valve 2 according to medium direction.

[0013] The inlet end vacuumizing automatic control valve 5 is arranged at the port of inlet end selection three-way automatic control valve 6 which is never communicated with other medium pipelines, and the outlet end vacuumizing automatic control valve 8 is arranged at the port of outlet end selection three-way automatic control valve 7 which is never communicated with other medium pipelines.

[0014] In the steam inlet stage, under the action of positive tesla valve 14, the flow rate of steam entering the capsule is faster than that of the prior art, and the condensate is also quickly discharged;In the primary hot water inlet and hot water circulating stages, the tesla valve 14 of the steam inlet branch pipeline can prevent hot water from entering the steam pipeline;When normal recovery, discharge and vacuumizing are carried out, the tesla valve plays a positive acceleration role, and the tesla valves arranged in the recovery branch pipeline, zero pressure discharge branch pipeline, main discharge branch pipeline and condensate discharge branch pipeline also play a check valve role.

[0015] The hot water vulcanization process is adopted in the embodiment. Each vulcanization process performs the following process steps: step one, steam inlet automatic valve 2 is opened and kept for a certain time according to the process, steam enters the capsule through the center mechanism 1, and condensed water is discharged by condensed water discharge automatic valve 13 during the process; step two, steam inlet automatic valve 2 and condensed water discharge automatic valve 13 are closed, primary hot water inlet automatic valve 3 is opened and kept for a certain time according to the process, and hot water is filled into the capsule; step three, primary hot water inlet automatic valve 3 is closed, circulating hot water inlet automatic valve 4 and hot water circulating outlet automatic valve 9 are opened and kept for a certain time according to the process, and hot water circulation is performed; step four, circulating hot water inlet automatic valve 4 and hot water circulating outlet automatic valve 9 are closed, recovery automatic valve 10 is opened and kept for a certain time according to the process, and the hot water in the capsule is recovered; step five, recovery automatic valve 10 is closed, zero-pressure discharge automatic valve 11 is opened and kept for a certain time according to the process, and the capsule is emptied; step six, zero-pressure discharge automatic valve 11 is closed, inlet end selection three-way automatic valve 6, inlet end vacuum automatic valve 5, and outlet end selection three-way valve 7, outlet end vacuum automatic valve 8 are opened, until the pressure in the capsule is reduced to a value allowing the tire to be removed, and the tire is removed. After the tire is removed, the green tire is loaded and the above steps are performed again to perform another vulcanization process. In the non-vulcanization state, main discharge automatic valve 12 is kept open to ensure that the capsule is discharged to zero as soon as there is pressure.

[0016] In step one, under the action of the forward Tesla valve, the pressure rising speed in the capsule is faster than that of the prior art, until the pressure in the capsule is the same as the steam source pressure, and the condensed water is also quickly discharged; in steps two and three, during the opening of primary hot water inlet automatic valve 3 or circulating hot water inlet automatic valve 4, if steam inlet automatic valve 2 has internal leakage, the hot water has a tendency to flow to the steam branch pipeline due to the high pressure of the hot water, but the Tesla valve of the steam inlet branch pipeline plays a reverse stop (check) role for the hot water flowing in this direction; similarly, the remaining Tesla valves play a forward acceleration role when performing normal recovery, discharge, and vacuumization. Once recovery automatic valve 10, zero-pressure discharge automatic valve 11, main discharge automatic valve 12, and condensed water discharge automatic valve 13 have internal leakage, the Tesla valve of the branch pipeline where they are located plays a reverse stop (check) role.

[0017] The Tesla valve adopted in the embodiment is made by pipeline bending and welding, and has no moving parts inside, which is low in cost and will not fail due to impurities when playing a check role like ordinary check valves.

[0018] The present application adopts the low-cost Tesla valve, which can accelerate the flow rate of the related branch pipe, increase the internal pressure medium recovery amount, accelerate the internal pressure to return to zero, and effectively prevent backflow; by setting a three-way valve at the intersection of the branch pipe of the vacuumizing self-control valve and the pipeline after the convergence of other self-control valves, the probability of mutual influence of vacuumizing and other media is reduced. Thus, the waste and defective products are reduced, and the problem of delayed mold opening caused by slow internal pressure return to zero of the vulcanizing machine is solved.

Claims

1. An internal pressure pipeline for a tire vulcanizing machine, comprising a central mechanism, characterized in that... The central mechanism's inlet pipeline is equipped with 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. At the intersection of the confluence of the steam inlet automatic control valve, the primary hot water inlet automatic control valve, and the circulating hot water inlet automatic control valve, and the branch pipeline containing the inlet vacuum automatic control valve, an inlet selection three-way automatic control valve is installed. The other end of the inlet selection three-way automatic control valve is connected to the inlet of the central mechanism via the inlet pipeline. At the central mechanism's outlet, an outlet vacuum automatic control valve, a hot water circulation outlet automatic control valve, a recovery automatic control valve, a zero-pressure discharge automatic control valve, a main exhaust automatic control valve, and a condensate discharge automatic control valve are installed. The water discharge automatic control valve is equipped with an outlet selection three-way valve at the junction of the collection 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, and condensate discharge automatic control valve and the branch pipeline where the outlet vacuum automatic control valve is located. The other end of the outlet selection three-way valve is connected to the outlet of the central mechanism through the outlet pipeline. A positive Tesla valve is installed in the direction of the medium at the rear of the inlet vacuum automatic control valve, outlet vacuum automatic control valve, recovery automatic control valve, zero pressure discharge automatic control valve, main discharge automatic control valve, and condensate discharge automatic control valve, and in front of the steam inlet automatic control valve.

2. The internal pressure pipeline of the tire vulcanizing machine according to claim 1, characterized in that... The aforementioned inlet vacuum self-control valve is located at the port of the inlet three-way self-control valve, which is never connected to other media pipelines.

3. The internal pressure pipeline of the tire vulcanizing machine according to claim 1, characterized in that... The aforementioned outlet vacuum control valve is located at the port of the three-way control valve at the outlet end, which is never connected to other media pipelines.

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