Tire envelope airtightness detection mechanism

Abstract

The utility model discloses a tire envelope sealing sleeve air tightness detection mechanism, which comprises a vacuum pump, a tire and an envelope sealing sleeve, the envelope sealing sleeve is sleeved on the tire, the envelope sealing sleeve is provided with an air tap, the outer wall of the air tap is provided with a trapezoidal ring groove, a first positioning ring is arranged in the air tap, the first positioning ring is connected with a first spring, and the first spring is connected with a second positioning ring. A first spring is arranged on the vacuum pump, a first sealing plug is connected to the first spring, the first sealing plug is plugged in one end of the air nozzle, a connector is connected to the vacuum pump, a second positioning ring is arranged in the connector, a second spring is connected to the second positioning ring, and a second sealing plug is connected to the second spring. The air tightness detection outside the tank is carried out before the tire and the envelope cover enter the vulcanizing tank, so that the time is effectively saved, the production efficiency is improved, the energy consumption of inflation and deflation is reduced, the problems of insufficient vulcanization, vulcanization failure and rejection rate increase caused by the leakage of the envelope cover are reduced, the equipment cost is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air tightness detection of tire encapsulation sleeves, and particularly relates to an air tightness detection mechanism for tire encapsulation sleeves. Background Art

[0002] When retreading old tires, an encapsulation sleeve needs to be wrapped on the tread surface, and the retreading is completed through vulcanization operation. Vulcanization is the last process in the processing of rubber products, and the quality of vulcanization has a great influence on the performance of vulcanized rubber. Therefore, the vulcanization pressure should be strictly controlled. The purpose of applying pressure to the rubber compound during vulcanization is to make the rubber compound flow in the mold cavity, fill the grooves, prevent the appearance of air bubbles or lack of rubber; improve the density of the rubber compound; enhance the adhesion strength between the rubber compound and the fabric layer or metal; and help improve the physical and mechanical properties of the rubber compound.

[0003] In the prior art, after all tires are installed with encapsulation sleeves, they are all pushed into the vulcanization tank to check the air tightness. Once air leakage is found, the tank door is opened, the corresponding leaking tire is removed, the encapsulation sleeve is replaced, reinstalled into the vulcanization tank, the tank door of the vulcanization tank is closed and sealed, and the vulcanization cycle is restarted. Both the non-leaking and leaking tires in the tank need to be pulled out, the reasons are found, and then reinstalled into the vulcanization tank, which reduces the vulcanization effect. Therefore, an air tightness detection mechanism for tire encapsulation sleeves is needed to meet people's needs. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an air tightness detection mechanism for tire encapsulation sleeves to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: an air tightness detection mechanism for tire encapsulation sleeves, including a vacuum pump, a tire and an encapsulation sleeve. The encapsulation sleeve is sleeved on the tire. An air nozzle is arranged on the encapsulation sleeve. A trapezoidal ring groove is formed on the outer wall of the air nozzle. A first positioning ring is arranged in the air nozzle. A first spring is connected to the first positioning ring. A first sealing plug is connected to the first spring. The first sealing plug plugs one end inside the air nozzle. A joint is connected to the vacuum pump. A second positioning ring is arranged in the joint. A second spring is connected to the second positioning ring. A second sealing plug is connected to the second spring. The second sealing plug plugs one end inside the joint. A third spring is connected to the outer wall of the joint. A sliding sleeve is connected to the third spring. The sliding sleeve is slidably connected to the outer wall of the joint. A plurality of ball bearings are movably installed in the side wall of the joint. One ends of the plurality of ball bearings away from each other are in contact with the inner wall of the sliding sleeve. One ends of the plurality of ball bearings close to each other are located in the trapezoidal ring groove.

[0006] Preferably, the vacuum pump and the joint are connected by a hose.

[0007] Preferably, the outer wall of one end of the air nozzle located inside the joint is conical.

[0008] Preferably, the inner diameter of the inner jack of the joint is the same as the diameter of the air nozzle.

[0009] Preferably, an annular groove is formed on the outer wall of the joint, the third spring is located in the annular groove, the inner wall of the sliding sleeve in contact with the ball extends inward and contacts the outer wall of the annular groove, and the inner walls at both ends of the sliding sleeve contact the outer wall of the joint.

[0010] Preferably, a plurality of through holes are formed on the inner wall of the joint, the through holes penetrate to the annular groove, each ball is respectively located in a corresponding through hole, the inner diameter of the opening at one end of the through hole located in the annular groove is the same as the diameter of the ball, and the inner diameter of the opening at one end of the through hole located on the inner wall of the joint is slightly smaller than the diameter of the ball.

[0011] Preferably, anti-slip grooves are axially distributed on the outer wall of the sliding sleeve.

[0012] The beneficial effects of the present utility model are as follows:

[0013] In the present utility model, through the setting of the vacuum pump, the airtightness detection outside the tank is carried out on the tire and the encapsulation before entering the vulcanizing tank, effectively saving time, improving production efficiency, reducing the energy consumption of inflation and deflation, and reducing the problems of insufficient vulcanization and vulcanization failure caused by the leakage of the encapsulation, resulting in an increase in the rejection rate, thereby reducing the equipment cost and improving the production efficiency.

[0014] In the present utility model, through the quick-release structure between the joint and the air nozzle, the airtightness of the vacuum pump for detecting the tire and the encapsulation is ensured, and at the same time, the connection and disassembly between the joint and the air nozzle are made more rapid, improving the detection efficiency of the airtightness and relatively improving the production efficiency of the subsequent vulcanization operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of an airtightness detection mechanism for a tire encapsulation proposed by the present utility model;

[0016] Figure 2 is a schematic structural diagram of the connection structure between the encapsulation and the air nozzle of an airtightness detection mechanism for a tire encapsulation proposed by the present utility model;

[0017] Figure 3 is a schematic structural diagram of the connection structure between the air nozzle and the joint of an airtightness detection mechanism for a tire encapsulation proposed by the present utility model;

[0018] Figure 4 is a schematic side sectional view of the connection structure between the air nozzle and the joint of an airtightness detection mechanism for a tire encapsulation proposed by the present utility model.

[0019] In the figure: 1. Vacuum pump; 2. Tire; 3. Encapsulation sleeve; 4. Air nozzle; 5. Trapezoidal ring groove; 6. First positioning ring; 7. First spring; 8. First sealing plug; 9. Connector; 10. Second positioning ring; 11. Second spring; 12. Second sealing plug; 13. Third spring; 14. Sliding sleeve; 15. Ball; 16. Hose; 17. Ring groove; 18. Through hole; 19. Anti-slip groove. Specific implementation mode

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0021] Refer to Figures 1-4 , a tire encapsulation sleeve airtightness detection mechanism, including a vacuum pump 1, a tire 2 and an encapsulation sleeve 3. The encapsulation sleeve 3 is sleeved on the tire 2. An air nozzle 4 is provided on the encapsulation sleeve 3. A trapezoidal ring groove 5 is formed on the outer wall of the air nozzle 4. A first positioning ring 6 is arranged in the air nozzle 4. A first spring 7 is connected to the first positioning ring 6. A first sealing plug 8 is connected to the first spring 7. The first sealing plug 8 plugs one end inside the air nozzle 4. A connector 9 is connected to the vacuum pump 1. A second positioning ring 10 is arranged in the connector 9. A second spring 11 is connected to the second positioning ring 10. A second sealing plug 12 is connected to the second spring 11. The second sealing plug 12 plugs one end inside the connector 9. A third spring 13 is connected to the outer wall of the connector 9. A sliding sleeve 14 is connected to the third spring 13. The sliding sleeve 14 is slidably connected to the outer wall of the connector 9. A plurality of balls 15 are movably installed inside the side wall of the connector 9. One ends of the plurality of balls 15 away from each other are in contact with the inner wall of the sliding sleeve 14. One ends of the plurality of balls 15 close to each other are located in the trapezoidal ring groove 5.

[0022] By setting up the vacuum pump 1, the airtightness of the tire 2 and the encapsulation 3 can be detected outside the vulcanizing tank before entering the tank, effectively saving time, improving production efficiency, reducing the energy consumption of inflation and deflation, and reducing the problems of insufficient vulcanization and vulcanization failure caused by the leakage of the encapsulation 3, resulting in an increase in the rejection rate. Thus, the equipment cost is reduced and the production efficiency is improved. By sliding the sliding sleeve 14, the thrust for several balls 15 to contract inward is lost, so that the nozzle 4 can smoothly enter the joint 9. At this time, the first sealing plug 8 contacts the second sealing plug 12, causing the first spring 7 and the second spring 11 to be compressed simultaneously. A gap is generated between the first sealing plug 8 and the nozzle 4, and a gap is generated between the second sealing plug 12 and the joint 9. After releasing the sliding sleeve 14, the elastic force of the third spring 13 causes the sliding sleeve 14 to return to its initial position, generating an inward contraction thrust on several balls 15, causing the balls 15 to be embedded in the trapezoidal annular groove 5, thus realizing the connection between the nozzle 4 and the joint 9 and the internal communication, facilitating the operation of the vacuum pump 1 to evacuate the space between the tire 2 and the encapsulation 3 and the airtightness detection. While the operation is convenient, the production efficiency of subsequent vulcanization operations is improved.

[0023] Specifically, in this embodiment, the vacuum pump 1 is connected to the joint 9 through a hose 16, and the flexibility of the hose 16 satisfies the connection of the joint 9 in different angular states of the nozzle 4.

[0024] Specifically, in this embodiment, the outer wall of the end of the nozzle 4 located inside the joint 9 is conical, which is convenient for the nozzle 4 to generate an outward expansion thrust on the balls 15 when inserting into the joint 9, making the insertion of the nozzle 4 smoother.

[0025] Specifically, in this embodiment, the inner diameter of the inner hole of the joint 9 is the same as the diameter of the nozzle 4, avoiding the shaking of the nozzle 4 after inserting into the joint 9 and improving the fit and airtightness between the nozzle 4 and the joint 9.

[0026] Specifically, in this embodiment, an annular groove 17 is formed on the outer wall of the joint 9. The third spring 13 is located in the annular groove 17. The inner wall of the sliding sleeve 14 in contact with the balls 15 extends inward and contacts the outer wall of the annular groove 17. The inner walls at both ends of the sliding sleeve 14 contact the outer wall of the joint 9. The annular groove 17 provides a sliding space for the sliding sleeve 14 and prevents the sliding sleeve 14 from separating from the joint 9.

[0027] Specifically, in this embodiment, a plurality of through holes 18 are formed in the inner wall of the joint 9. The through holes 18 penetrate through to the annular groove 17. Each ball 15 is respectively located in a corresponding through hole 18. The inner diameter of the opening at one end of the through hole 18 located in the annular groove 17 is the same as the diameter of the ball 15, and the inner diameter of the opening at one end of the through hole 18 located on the inner wall of the joint 9 is slightly smaller than the diameter of the ball 15. The through holes 18 provide sufficient moving space for the outward expansion of the balls 15, facilitating the smooth insertion of the air nozzle 4 into the joint 9, and preventing the balls 15 from separating from the joint 9 when contracting inward, thereby improving the integrity.

[0028] Specifically, in this embodiment, axially distributed anti-slip grooves 19 are formed on the outer wall of the sliding sleeve 14 to prevent the problem of slipping off during the process of sliding the sliding sleeve 14.

[0029] The above is only the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. A tire envelope air tightness detection mechanism, comprising a vacuum pump (1), a tire (2) and an envelope (3), characterized in that: The encapsulation sleeve (3) is sleeved on the tire (2), an air nozzle (4) is arranged on the encapsulation sleeve (3), a trapezoidal annular groove (5) is provided on the outer wall of the air nozzle (4), a first positioning ring (6) is arranged inside the air nozzle (4), a first spring (7) is connected to the first positioning ring (6), a first sealing plug (8) is connected to the first spring (7), the first sealing plug (8) is sealed in one end of the air nozzle (4), a joint (9) is connected to the vacuum pump (1), a second positioning ring (10) is arranged inside the joint (9), and a second spring (11) is connected to the second positioning ring (10) The second spring (11) is connected to a second sealing plug (12), and the second sealing plug (12) is sealed in one end of the joint (9). The outer wall of the joint (9) is connected to a third spring (13), and the third spring (13) is connected to a sliding sleeve (14). The sliding sleeve (14) is slidably connected to the outer wall of the joint (9). A plurality of balls (15) are movably installed in the side wall of the joint (9), and the ends of the plurality of balls (15) that are away from each other are in contact with the inner wall of the sliding sleeve (14), and the ends of the plurality of balls (15) that are close to each other are located in the trapezoidal annular groove (5).

2. A tire envelope air tightness detection mechanism according to claim 1, characterized in that: The vacuum pump (1) and the joint (9) are connected via a hose (16).

3. A tire envelope air tightness detection mechanism according to claim 1, characterized in that: The outer wall of one end of the air nozzle (4) located inside the joint (9) is tapered.

4. A tire envelope air tightness detection mechanism according to claim 1, characterized in that: The inner diameter of the insertion hole in the joint (9) is the same as the diameter of the air nozzle (4).

5. The tire envelope air tightness detection mechanism according to claim 1, characterized in that: An annular groove (17) is provided on the outer wall of the joint (9), the third spring (13) is located in the annular groove (17), the inner wall of the sliding sleeve (14) in contact with the ball (15) extends inwardly and contacts the outer wall of the annular groove (17), and the inner walls at both ends of the sliding sleeve (14) contact the outer wall of the joint (9).

6. A tire envelope air tightness detection mechanism according to claim 1, characterized in that: The inner wall of the joint (9) is provided with a plurality of through holes (18), the through holes (18) extending through the annular groove (17), each ball (15) being located in a corresponding through hole (18), the through hole (18) being located at one end of the annular groove (17) having an inner diameter that is the same as the diameter of the ball (15), and the through hole (18) being located at one end of the inner wall of the joint (9) having an inner diameter that is slightly smaller than the diameter of the ball (15).

7. A tire envelope air tightness detection mechanism according to claim 1, characterized in that: The outer wall of the sliding sleeve (14) is provided with an axially distributed anti-slip groove (19).

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