Radial sealing structure of locking ring type steamer of giant tire vulcanizing machine

Abstract

The utility model discloses a radial sealing structure for a locking ring type steamer of a giant tire vulcanizing machine, which is arranged between a lower locking ring seat and a lower steamer, an annular groove is formed in the top of the outer edge of the lower steamer, and a vent hole is downwards formed in the annular groove; a sealing ring is arranged in the annular groove and comprises an upper circumferential ring and a lower circumferential ring, the upper circumferential ring comprises a long lip and a short lip which are forked in a V shape, the lower circumferential ring comprises two lip which are forked in an inverted V shape, the two lip of the lower circumferential ring are clamped and embedded in the annular groove, and the two lip of the upper circumferential ring is pressed by the pressing plate. The side face of the sealing ring can be prevented from being extruded and rubbed, the service life of the sealing ring can be greatly prolonged, and the sealing effect is more reliable.

Description

Technical Field

[0001] The utility model relates to a component structure of a tire shaping vulcanizer, in particular to a radial sealing structure of a lock ring type steamer of a giant tire vulcanizer. Background Art

[0002] Common implementation methods of radial sealing of conventional giant tire vulcanizer lock ring steamer and utility model patent CN218749446U Figure 2 The structures shown are similar, and both use the pressure plate to press the sealing ring, and the sealing ring is squeezed tightly between the lower lock ring seat and the lower steamer by its own elasticity to form a seal. This sealing structure has the following problems: each time the lower steamer is raised and lowered to adjust the mold and tighten the mold, the side of the radial sealing ring is always squeezed and rubbed by the inner wall of the lower lock ring seat. Over time, the side of the sealing ring is worn, and the elasticity of the sealing ring is weakened under high temperature conditions and the radial size becomes thinner. When the pressure plate cannot be adjusted and pressed in time, the gap generated cannot be compensated and leaks, resulting in a shortened service life of the sealing ring. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a radial sealing structure for a giant tire vulcanizer lock-ring steamer, which can protect the side of the sealing ring from extrusion and friction, thereby greatly extending the service life of the sealing ring and making the sealing effect more reliable.

[0004] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0005] A radial sealing structure of a lock ring type steamer of a giant tire vulcanizer is arranged between a lower lock ring seat and a lower steamer, an annular groove is provided on the top of the outer edge of the lower steamer, and a vent hole is provided downward in the annular groove; a sealing ring is provided in the annular groove, including an upper ring and a lower ring, the upper ring is a V-shaped forked long and short lip, the lower ring is an inverted V-shaped forked lip, the two lips of the lower ring are embedded in the annular groove, and the two lips of the upper ring are pressed by a pressure plate.

[0006] Furthermore, the inner side surface of the long lip of the upper circle is pressed against the lower rounded corner of the end of the pressure plate.

[0007] Compared with the prior art, the advantages and effects of the utility model are:

[0008] 1. During the process of lowering, adjusting and tightening the mold of the lower steamer, the side of the sealing ring has no contact with the lower locking ring seat, so no wear will occur, thereby greatly extending the service life of the sealing ring;

[0009] 2. In the initial stage of vulcanization, the sealing ring is squeezed against the inner wall of the lower lock ring seat by means of external compressed air to form a seal. The sealing effect will not deteriorate due to the weakening of elasticity and loosening of the sealing ring over a long period of use;

[0010] 3. During the vulcanization process, it can automatically switch from compressed air sealing to steam pressure sealing inside the steamer. The greater the steam pressure, the tighter the seal, making the seal more stable and reliable, ensuring the stable requirements for temperature and pressure during vulcanization. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic structural view of the present utility model.

[0012] Figure 2 is Figure 1 The partial enlarged view at position A in (the sealing ring is in a non-sealed state).

[0013] Figure 3 is Figure 1 The partial enlarged view at position B in (the sealing ring is in an inflated sealing state).

[0014] Drawing number identification: 1. Lower lock ring seat; 2. Lower steamer; 3. Sealing ring; 3-1. Upper circumferential ring; 3-2. Lower circumferential ring; 4. Pressure plate; 5. Vent hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The present utility model will be further described below in conjunction with embodiments, but the present utility model is not limited to these embodiments.

[0016] A lock ring type steamer radial sealing structure of a giant tire vulcanizer described in this embodiment, as Figure 1 shown, is arranged between the lower lock ring seat 1 and the lower steamer 2. An annular groove is opened at the top of the outer edge of the lower steamer 2, and a vent hole 5 is opened downward in the annular groove; a sealing ring 3 is arranged in the annular groove, and the sealing ring 3 is pressed under the pressure plate 4.

[0017] As Figure 2 or 3 shown, the sealing ring 3 includes an upper circumferential ring 3-1 and a lower circumferential ring 3-2. The upper circumferential ring 3-1 is two lip petals with V-shaped fork and different lengths, and the lower circumferential ring 3-2 is two lip petals with inverted V-shaped fork. The two lip petals of the lower circumferential ring 3-2 are clamped in the annular groove, the short lip petal of the upper circumferential ring 3-1 is pressed under the pressure plate 4, and the inner side surface of the long lip petal of the upper circumferential ring 3-1 is pressed against the lower rounded corner of the end of the pressure plate 4.

[0018] The working principle of this embodiment is as follows:

[0019] 1. When no compressed air is filled, the inner side surface of the long lip petal of the upper circumferential ring 3-1 is pressed by the lower rounded corner of the end of the pressure plate 4, and there is a gap between the outer side surface of the long lip petal and the inner wall of the lower lock ring seat 1. At the same time, the pressure plate 4 presses the end surface of the short lip petal of the upper circumferential ring 3-1. During the process of lifting, adjusting the mold and tightening the mold of the lower steamer 2, the inner wall of the lower lock ring seat 1 has no contact and friction with the outer side surface of the long lip petal of the upper circumferential ring 3-1, as Figure 2 shown;

[0020] 2. At the initial stage of vulcanization, compressed air is filled into the annular groove through the air vent 5. The set pressure of the compressed air is slightly greater than the steam pressure in the steamer. While the compressed air keeps the two lip flaps of the lower circumference 3-2 open and always forms a seal in the annular groove, it presses the sealing ring 3 to move upward in the annular groove along the outer edge of the lower steamer 2. When it touches the pressing plate 4, it forces the two lip flaps of the upper circumference 3-1 to open, so that the long lip flap extends outward and abuts tightly against the inner wall of the lower lock ring seat 1 to play a sealing role. After the steam pressure in the pot reaches the required value, the sealing of the long lip flap by compressed air is automatically switched to the sealing by the steam pressure in the steamer. The greater the steam pressure in the steamer, the tighter the long lip flap fits against the inner wall of the lower lock ring seat 1 and the tighter the seal, as Figure 3 shown;

[0021] 3. After the vulcanization is completed, the supply of compressed air is stopped. The long and short lip flaps of the upper circumference 3-1 that lose the pressing of the compressed air rebound and close together. The outer side of the long lip flap relaxes the abutment with the inner wall of the lower lock ring seat 1 and returns to the state as Figure 2 shown.

Claims

1. A radial sealing structure of a lock ring type steamer of a giant tire vulcanizer, arranged between a lower lock ring seat (1) and a lower steamer (2), characterized in that: The outer edge top of the lower steamer (2) is provided with an annular groove, and a vent hole (5) is provided downward in the annular groove; a sealing ring (3) is provided in the annular groove, comprising an upper ring (3-1) and a lower ring (3-2); the upper ring (3-1) is a V-shaped forked long and short lip, and the lower ring (3-2) is an inverted V-shaped forked lip, the two lips of the lower ring (3-2) are embedded in the annular groove, and the two lips of the upper ring (3-1) are pressed by a pressing plate (4).

2. The radial sealing structure of a giant tire vulcanizing machine lock ring steamer according to claim 1, characterized in that: The inner side surface of the long lip of the upper ring (3-1) is pressed against the lower rounded corner of the end of the pressing plate (4).

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