Device for slow increase of internal pressure of hot water process tire vulcanizer

Abstract

The utility model relates to a device for slowly increasing the internal pressure of a hot water process tire vulcanizer, and belongs to the field of tire vulcanization. A steam inlet automatic control valve, a primary hot water inlet automatic control valve, and a secondary hot water inlet automatic control valve are arranged on the capsule inlet pipeline, a primary hot water throttling plate is arranged on the rear branch of the primary hot water inlet automatic control valve, a hot water return automatic control valve is arranged on the capsule outlet pipeline, and a primary hot water external circulation automatic control valve and a primary hot water external circulation throttling plate connected in series are arranged between the front branch of the primary hot water inlet automatic control valve and the rear branch of the hot water return automatic control valve, and the primary hot water external circulation throttling plate is located behind the primary hot water external circulation throttling plate. The utility model not only avoids the influence of the primary hot water pressurization process on the power system and improves the stability of the internal temperature medium parameters of each vulcanizer during the vulcanization process; it also avoids the problem that the internal part of the tire embryo is subjected to uneven force due to the high-pressure expansion of the capsule due to the rapid increase in internal pressure, resulting in abnormal deformation of the tire body and the belt layer skeleton material.

Description

Technical Field

[0001] The utility model relates to the field of tire vulcanization, in particular to a device for slowly increasing the internal pressure of a hot water process tire vulcanizer. Background Art

[0002] As we all know, although many tires are vulcanized using nitrogen filling process, engineering vehicle tires and giant tires are still vulcanized using hot water process. The capsules for filling hot water in engineering vehicle tires and giant tire vulcanizers are generally large in volume and have high water supply pressure. In order to avoid the process of filling hot water into the capsule affecting the pressure of the hot water main, these vulcanizers generally use a one-time hot water automatic control valve to initially fill the capsule, and there is a phenomenon of rapid increase in internal pressure during the pressure filling process. However, due to the correlation of the power system, the one-time hot water filling process still has a certain impact on the power system, thereby affecting the stability of the hot water medium parameters in the vulcanization process of other machines. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a device for slowly increasing the internal pressure of a hot water process tire vulcanizer, which is beneficial to improving the quality of tires.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a device for slowly raising the internal pressure of a hot water process tire vulcanizer, which is provided with a capsule and is characterized in that a steam inlet automatic control valve, a primary hot water inlet automatic control valve and a secondary hot water inlet automatic control valve are arranged on the capsule inlet pipeline, a primary hot water throttling plate is arranged on the rear branch pipe of the primary hot water inlet automatic control valve, a hot water return automatic control valve is arranged on the capsule outlet pipeline, a primary hot water external circulation automatic control valve and a primary hot water external circulation throttling plate connected in series are arranged between the front branch pipe of the primary hot water inlet automatic control valve and the rear branch pipe of the hot water return automatic control valve, and the primary hot water external circulation throttling plate is located behind the primary hot water external circulation throttling plate.

[0005] The primary hot water throttle plate and the primary hot water external circulation throttle plate are formed by opening a hole in the center of a circular steel plate.

[0006] The beneficial effect of the utility model is that, by controlling the slow rise of internal pressure, not only the influence of a hot water charging process on the power system is avoided, and the stability of the internal temperature medium parameters of each vulcanizer during the vulcanization process is improved; it also avoids the problem of uneven force on the tire embryo due to the high-pressure expansion of the capsule caused by the rapid rise of internal pressure, resulting in abnormal deformation of the tire body and belt layer skeleton materials, etc., which is beneficial to improving the quality of the tire. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0008] Figure 1 A schematic structural diagram of the utility model.

[0009] Figure 2 Schematic diagram of the structure of the throttle plate.

[0010] Figure 3 Schematic diagram of the internal pressure curve of this embodiment.

[0011] Figure 4 It is a schematic diagram of the internal pressure curve of the prior art.

[0012] In the figure, 1. capsule, 2. steam inlet automatic control valve, 3. primary hot water inlet automatic control valve, 4. primary hot water throttle plate, 5. secondary hot water inlet automatic control valve, 6. hot water return automatic control valve, 7. primary hot water external circulation automatic control valve, 8. primary hot water external circulation throttle plate. DETAILED DESCRIPTION

[0013] In the figure, the utility model is provided with a bladder 1 of a tire vulcanizer, a steam inlet automatic valve 2, a primary hot water inlet automatic valve 3, and a secondary hot water inlet automatic valve 5 are arranged on the inlet pipeline of the bladder 1 of the tire vulcanizer, a primary hot water throttle plate 4 is arranged on the rear branch of the primary hot water inlet automatic valve 3, a hot water return automatic valve 6 is arranged on the outlet pipeline of the capsule 1, a primary hot water external circulation automatic valve 7 and a primary hot water external circulation throttle plate 8 are arranged in series between the front branch of the primary hot water inlet automatic valve 3 and the rear branch of the hot water return automatic valve 6, and the primary hot water external circulation throttle plate 8 is located behind the primary hot water external circulation automatic valve 7.

[0014] Each time the green tire is loaded and vulcanization begins, the preset steps are executed: the first step is to open the steam inlet automatic control valve 2 to fill the capsule 1 with steam and maintain it for a certain time according to the process setting, during which the internal pressure is about 0.8 MPa; the second step is to close the steam inlet automatic control valve 2, and at the same time open the primary hot water inlet automatic control valve 3 to fill the capsule 1 with primary hot water. Under the action of the primary water throttle plate 4, the internal pressure slowly rises to 1.6 MPa in about 6 minutes. Once the PLC detects that the internal pressure rises to 1.6 MPa, it automatically opens the primary hot water external circulation automatic control valve 7 to slow down the rate of internal pressure increase until the second step process setting time ends and the internal pressure rises to about 1.8 MPa; the third step is to close the primary hot water inlet automatic control valve 3 and the primary hot water external circulation automatic control valve 7, and at the same time open the secondary hot water inlet automatic control valve 5 and the hot water return automatic control valve 6, and the internal pressure rises to about 2.8 MPa.

[0015] The function of the primary hot water throttle plate 4 is to slow down the speed of the internal pressure rise during the primary filling process, and the function of the primary hot water external circulation automatic control valve 7 and the primary hot water external circulation throttle plate 8 is to limit the value of the internal pressure rise after the capsule 1 is filled. Both throttle plates are made of a circular steel plate with a hole in the center, and the structure is as follows: Figure 2The installation method is to clamp it between two flanges. Its outer diameter is the same as the diameter of the flange sealing surface. The hole diameter needs to be tested in advance for vulcanizers of different specifications. This embodiment is implemented in a 195-inch vulcanizer. The outer diameter of the primary hot water throttle plate 4 is 102mm, and the hole diameter is 32mm; the outer diameter of the primary hot water external circulation throttle plate 8 is 68mm, and the hole diameter is 18mm.

[0016] The throttle plate opening size and internal pressure control value can be adjusted according to experiments.

[0017] The internal pressure curve of this embodiment is as follows: Figure 3 , the comparative internal pressure curve without using the present invention is as follows Figure 4 In the figure, the horizontal axis is the time axis, the vertical axis is the pressure axis, the period a is the first step steam stage, the period b is the second step primary water stage, and the period after period b is the third step secondary water stage. By comparing the two pressure curves, it can be seen that the primary water pressure of the embodiment not using the present invention rises faster, especially after the capsule 1 is filled, it almost instantly rises to a value higher than the secondary water pressure, while the internal pressure rise speed of the primary water stage of the present embodiment is slowed down twice and limited to a value lower than the secondary water pressure.

Claims

1. A device for slowly increasing the internal pressure of a hot water process tire vulcanizer, provided with a capsule, characterized in that: A steam inlet automatic control valve, a primary hot water inlet automatic control valve and a secondary hot water inlet automatic control valve are arranged on the capsule inlet pipeline, a primary hot water throttling plate is arranged on the rear branch of the primary hot water inlet automatic control valve, a hot water return automatic control valve is arranged on the capsule outlet pipeline, a primary hot water external circulation automatic control valve and a primary hot water external circulation throttling plate are arranged in series between the front branch of the primary hot water inlet automatic control valve and the rear branch of the hot water return automatic control valve, and the primary hot water external circulation throttling plate is located behind the primary hot water external circulation throttling plate.

2. The device for slowly increasing the internal pressure of a hot water process tire vulcanizer according to claim 1, characterized in that The primary hot water throttle plate and the primary hot water external circulation throttle plate are formed by opening a hole in the center of a circular steel plate.

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