An inert gas vulcanization medium supply and recovery system and tire vulcanization system

Abstract

The present invention discloses a gas supply and recovery system for an inert gas vulcanization medium, comprising a gas supply device, a pressurizing device, a high-pressure tank and a shaping tank, and further comprising a low-pressure recovery tank, a vacuum tank, a vacuum pump and a purity detector; wherein the gas supply device is connected to the high-pressure tank via the pressurizing device, and the high-pressure tank is connected to a high-pressure gas supply pipeline; the gas supply device is connected to the shaping tank, and the shaping tank is respectively connected to a shaping gas supply pipeline and a high-pressure recovery pipeline; the low-pressure recovery tank is connected to the high-pressure tank via the pressurizing device, the low-pressure recovery tank is connected to the shaping tank, and the low-pressure recovery tank is connected to a low-pressure recovery pipeline; the vacuum tank is connected to an exhaust pipeline, and the vacuum tank is connected to the low-pressure recovery tank via a vacuum pump and a purity detector. It can be seen from the above-disclosed technical content that the present invention mainly achieves the technical effect of significantly improving the nitrogen recovery rate in a vulcanization process using pure nitrogen as a vulcanization medium and combined with an electrically heated outer mold by designing a nitrogen recovery structure specifically for this new vulcanization process.

Description

Technical Field

[0001] The present invention relates to a tire vulcanizing device that uses an inert gas (such as pure nitrogen) as a vulcanizing medium for heating, and more particularly to a gas supply and recovery system for the inert gas vulcanizing medium, and a tire vulcanizing system including the gas supply and recovery system. Background Art

[0002] Traditional tire vulcanization processes typically use a combination of high-temperature steam and nitrogen for vulcanization. After vulcanization, nitrogen recovery, exhaust, and vacuuming are performed sequentially. The nitrogen recovery rate during recovery is approximately 50%, and nitrogen during both exhaust and vacuuming is exhausted to the atmosphere. Therefore, the nitrogen recovery rate of traditional vulcanization processes needs to be improved. Summary of the Invention

[0003] To solve the above technical problems, the applicant proposes a vulcanization process using pure nitrogen as a vulcanization medium in a vulcanization bladder, combined with an electrically heated outer mold. The present invention provides a gas supply and recovery system for an inert gas vulcanization medium, comprising a gas supply device, a pressurizing device, a high-pressure tank, and a shaping tank, and further comprising a low-pressure recovery tank, a vacuum tank, a vacuum pump, and a purity detector. The gas supply device is connected to the high-pressure tank via the pressurizing device, and the high-pressure tank is connected to a high-pressure gas supply line; the gas supply device is connected to the shaping tank, and the shaping tank is connected to the shaping gas supply line and the high-pressure recovery line, respectively; the low-pressure recovery tank is connected to the high-pressure tank via the pressurizing device, the low-pressure recovery tank is connected to the shaping tank, and the low-pressure recovery tank is connected to a low-pressure recovery line; the vacuum tank is connected to an exhaust line, and the vacuum tank is connected to the low-pressure recovery tank via a vacuum pump and a purity detector.

[0004] Preferably, the high-pressure tank is connected to the shaping tank via a first valve assembly.

[0005] Preferably, the shaping tank is connected to the high-pressure tank through the second valve assembly and the boosting device.

[0006] Preferably, the high-pressure recovery pipeline is provided with a third valve assembly, a heat exchanger, a first steam-water separator and a first filter respectively from the side close to the shaping tank.

[0007] Preferably, the heat exchanger is a four-way heat exchanger, and the high-pressure tank is connected to the heat exchanger.

[0008] Preferably, the low-pressure recovery pipeline is provided with a second steam-water separator and a second filter, and the second steam-water separator is provided close to one side of the low-pressure recovery tank.

[0009] Preferably, the exhaust pipeline is provided with a third steam-water separator and a third filter, and the third steam-water separator is provided close to one side of the vacuum tank.

[0010] Preferably, the pressure value of the high-pressure tank is 2.0 MPa to 3.5 MPa; the pressure value of the shaping tank is 0.5 MPa to 1 MPa; and the pressure value of the low-pressure recovery tank is 0.1 MPa to 0.5 MPa.

[0011] Preferably, the air supply device is connected to the shaping tank after passing through the fourth valve assembly and the seventh valve assembly; the shaping tank is connected to the shaping air supply pipeline after passing through the fifth valve assembly; the low-pressure recovery tank is connected to the shaping tank after passing through the sixth valve assembly and the seventh valve assembly; the low-pressure recovery tank is connected to the high-pressure tank after passing through the sixth valve assembly and the boosting device.

[0012] The present invention also provides a tire vulcanization system, including a vulcanizer; it also includes an air supply and recovery system for the inert gas vulcanization medium as described above, and the vulcanizer is respectively connected to the high-pressure air supply pipeline, the shaping air supply pipeline, the high-pressure recovery pipeline, the low-pressure recovery pipeline and the exhaust pipeline in the air supply and recovery system.

[0013] From the above disclosed technical content, it can be seen that the gas supply and recovery system for the inert gas vulcanization medium described in the present invention mainly uses pure nitrogen as the vulcanization medium and combines it with the vulcanization process of the electrically heated outer mold. By designing a nitrogen recovery structure specifically for this new vulcanization process, the technical effect of significantly improving the nitrogen recovery rate is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the gas supply and recovery system of the inert gas sulfurization medium according to the first embodiment of the present invention.

[0015] Figure 2 for Figure 1 Schematic diagram of the medium gas supply device filling nitrogen into the high-pressure tank and the shaping tank.

[0016] Figure 3 for Figure 1 Schematic diagram of the gas supply to the medium shaping tank.

[0017] Figure 4 for Figure 1 Schematic diagram of gas supply from medium and high pressure tanks.

[0018] Figure 5 for Figure 1 Schematic diagram of nitrogen recovery in the intermediate shaping tank.

[0019] Figure 6 for Figure 1 Schematic diagram of nitrogen recovery in medium and high pressure tanks.

[0020] Figure 7 for Figure 1 Schematic diagram of direct nitrogen recovery in medium and low pressure recovery tanks.

[0021] Figure 8 for Figure 1 Schematic diagram of nitrogen recovery from medium and low pressure recovery tanks via vacuum tanks.

[0022] Figure 9 Schematic diagram of a gas supply and recovery system for an inert gas sulfurization medium according to a second embodiment of the present invention.

[0023] Figure 10 FIG. 1 is a schematic diagram of a tire vulcanization system according to a first embodiment of the present invention.

[0024] Figure 11 FIG2 is a schematic diagram of a tire vulcanization system according to a second embodiment of the present invention. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings.

[0026] Note: The inert gas used as the vulcanization medium in the present invention refers to nitrogen, hydrogen, argon, etc. In the embodiments, only common and easily available nitrogen is used as an example for description.

[0027] See attached Figures 1 to 8As shown, the present invention discloses a gas supply and recovery system 1 for an inert gas vulcanization medium (such as pure nitrogen), comprising a gas supply device 11 for supplying pure nitrogen, which can be a nitrogen generator or a combination of liquid nitrogen and a vaporizer to provide pure nitrogen; a booster device 12 (such as a nitrogen booster) for boosting the pressure of the pure nitrogen; a high-pressure tank 13 for temporarily storing or supplying high-pressure nitrogen; a shaping tank 14 for temporarily storing or supplying shaping nitrogen; the gas supply and recovery system 1 also includes a low-pressure recovery tank 15 for temporarily storing low-pressure nitrogen; a vacuum tank 16 for emptying and temporarily storing the remaining nitrogen in the tire vulcanization bladder; a vacuum pump 17 for evacuating the vacuum tank 16, and in this embodiment, the vacuum pump 17 also has a boosting function; a purity detector 18 for detecting the purity of the nitrogen output from the vacuum tank 16; wherein the gas supply device 11 passes through the fourth valve assembly F 4 and the boosting device 12 are connected with the high-pressure tank 13, and the high-pressure tank 13 is connected with the high-pressure air supply pipeline H; the air supply device 11 is connected with the shaping tank 14 after passing through the fourth valve assembly F4 and the seventh valve assembly F7, and the shaping tank 14 is connected with the shaping air supply pipeline D after passing through the fifth valve assembly F5, and the shaping tank 14 is also connected with the high-pressure recovery pipeline HR; the low-pressure recovery tank 15 is connected with the high-pressure tank 13 after passing through the sixth valve assembly F6 and the boosting device 12, and the low-pressure recovery tank 15 is connected with the shaping tank 14 after passing through the sixth valve assembly F6 and the seventh valve assembly F7, and the low-pressure recovery tank 15 is connected with the low-pressure recovery pipeline LR; the vacuum tank 16 is connected with the exhaust pipeline P, and the vacuum tank 16 is connected with the low-pressure recovery tank 15 after passing through the vacuum pump 17 and the purity detector 18.

[0028] Because the present invention adopts pure nitrogen vulcanization process, through the above-mentioned design, after tire vulcanization is completed, generally speaking, part of the high-pressure nitrogen can be recovered first by the shaping tank 14, and then the nitrogen after the partial depressurization can be directly recovered by the low-pressure recovery tank 15, and then the remaining nitrogen in the capsule is emptied by the vacuum tank 16 and temporarily stored in the vacuum tank 16, and the nitrogen temporarily stored in the vacuum tank 16 is pressurized by the vacuum pump 17 and the purity detector 18 is tested for purity, and the nitrogen that meets the purity requirements is then recovered in the low-pressure recovery tank 15, and the nitrogen that does not meet the purity requirements is discharged to the atmosphere. Therefore, the use of the present application can improve the recovery rate of nitrogen to more than 90%. In addition, each valve assembly F described in the present application can be set to a combination of a one-way valve and a solenoid valve, or set to a combination of a one-way valve, a solenoid valve and a manual valve.

[0029] Optionally, the high-pressure tank 13 of the present invention is connected to the shaping tank 14 through the first valve assembly F1, and the shaping tank 14 is connected to the high-pressure tank 13 after passing through the second valve assembly F2 and the pressurizing device 12. Therefore, when the nitrogen in the shaping tank 14 is insufficient, the first valve assembly F1 can be opened and controlled to replenish the nitrogen in the high-pressure tank 13 into the shaping tank 14 in a required amount. In addition, when the shaping tank 14 recovers high-pressure nitrogen, high-pressure nitrogen that exceeds the set pressure value of the shaping tank 14 can be transferred to the high-pressure tank 13 after being pressurized by the second valve assembly F2 and the pressurizing device 12 (i.e., in special circumstances). Similarly, when the nitrogen in the shaping tank 14 is insufficient, the first valve assembly F1 can be opened and controlled to replenish the nitrogen in the high-pressure tank 13 into the shaping tank 14 in a required amount.

[0030] Furthermore, the high-pressure recovery line HR of the present invention is provided with a third valve assembly F3, a heat exchanger 19, a first steam-water separator Q1, and a first filter T1. The third valve assembly F3 is provided on the high-pressure recovery line HR on the side close to the shaping tank 14, and the first filter T1 is provided on the side away from the shaping tank 14. The heat exchanger 19 is provided between the third valve assembly F3 and the first filter T1, and the first steam-water separator Q1 is provided between the first filter T1 and the heat exchanger 19. Preferably, the heat exchanger 19 is a four-way heat exchanger (i.e., a heat exchanger having four ports), and the high-pressure tank 13 is in communication with the heat exchanger 19.

[0031] Preferably, the low-pressure recovery line LR of the present invention is provided with a second steam-water separator Q2 and a second filter T2. The second steam-water separator Q2 is provided near the low-pressure recovery tank 15, and the second filter T2 is provided on the low-pressure recovery line LR away from the low-pressure recovery tank 15. The exhaust line P of the present invention is provided with a third steam-water separator Q3 and a third filter T3. The third steam-water separator Q3 is provided near the vacuum tank 16, and the third filter T3 is provided on the exhaust line P away from the vacuum tank 16.

[0032] Preferably, the volume of the high-pressure tank 13 of the present invention is 15 cubic meters to 50 cubic meters, and the pressure value of the high-pressure tank 13 is 2.0 MPa to 3.5 MPa; the volume of the shaping tank 14 is 20 cubic meters to 30 cubic meters, and the pressure value of the shaping tank 14 is 0.5 MPa to 1 MPa; the volume of the low-pressure recovery tank 15 is 10 cubic meters to 20 cubic meters, and the pressure value of the low-pressure recovery tank 15 is 0.1 MPa to 0.5 MPa. At this time, the nitrogen recovery efficiency of the gas supply and recovery system is better.

[0033] The working principle of the present invention is as follows. Figure 2As shown, when the high-pressure tank 13 and / or the shaping tank 14 need to be supplemented with nitrogen, the gas supply device 11 can simultaneously introduce nitrogen into the high-pressure tank 13 and the shaping tank 14, or selectively introduce nitrogen into the high-pressure tank 13 or the shaping tank 14 by adjusting the conduction or disconnection of the fourth valve component F4 and / or the seventh valve component F7; in addition, the high-pressure nitrogen in the high-pressure tank 13 can be supplemented into the shaping tank 14 by adjusting the first valve component F1; as shown in the attached figure, Figure 3 As shown, when the vulcanizing bladder (not shown) needs to be shaped and filled with nitrogen, the fifth valve assembly F5 can be adjusted to introduce the nitrogen in the shaping tank 14 into the vulcanizing bladder through the shaping air supply pipeline D; Figure 4 As shown, when the vulcanizing bladder (not shown) needs to be filled with high-pressure nitrogen for vulcanizing a green tire (not shown), the high-pressure nitrogen in the high-pressure tank 13 is introduced into the vulcanizing bladder through the high-pressure gas supply line H; Figure 5 As shown, after the vulcanization of a green tire is completed, the high-temperature and high-pressure nitrogen in the vulcanization bladder can be recovered to the shaping tank 14 through the high-pressure recovery pipeline HR. At this time, preferably, part of the high-temperature and high-pressure nitrogen in the vulcanization bladder is first filtered through the first filter T1 to remove possible impurities, and then filtered through the first steam-water separator Q1 to remove possible water, and then the pure and dry high-temperature and high-pressure nitrogen is introduced into the shaping tank 14 for temporary storage after passing through the heat exchanger 19. The role and function of each steam-water separator and filter described later are the same as those of the first filter T1 and the first steam-water separator Q1; as shown in the attached figure, Figure 6 As shown, when the pressure of part of the high-temperature and high-pressure nitrogen in the curing bladder is high (such as greater than 1 MPa), that is, when it exceeds the set pressure range of the sizing tank 14, the second valve assembly F2 is turned on and the seventh valve assembly F7 is turned off to guide the over-pressure high-temperature and high-pressure nitrogen through the second valve assembly F2 and the booster device 12 into the high-pressure tank 13 for temporary storage; as shown in the attached Figure 7 As shown, after part of the high-temperature and high-pressure nitrogen in the curing bladder is temporarily stored in the shaping tank 14 and / or the high-pressure tank 13, the remaining low-pressure nitrogen passes through the second filter T2 and the second steam-water separator Q2 and is temporarily stored in the low-pressure recovery tank 15. The nitrogen in the low-pressure recovery tank 15 can be introduced into the high-pressure tank 13 or the shaping tank 14 as needed; as shown in the attached figure. Figure 8 As shown, the last remaining nitrogen in the vulcanization bladder is evacuated through the vacuum tank 16 and is temporarily stored in the vacuum tank 16 after passing through the third filter T3 and the third steam-water separator Q3. According to actual needs, the nitrogen temporarily stored in the vacuum tank 16 is pressurized by the vacuum pump 17 and tested by the purity detector 18. The qualified pure nitrogen is then introduced into the low-pressure recovery tank 15, and the unqualified nitrogen is discharged into the atmosphere.

[0034] The heat exchanger 19 of the present invention is used to temporarily store the heat of the high-temperature, high-pressure nitrogen in the vulcanization bladder through heat exchange to reduce the pressure of the nitrogen. At the same time, when the high-pressure nitrogen introduced by the high-pressure tank 13 passes through the heat exchanger 19, the heat energy of the heat exchanger 19 can be taken away, thereby improving the utilization rate of heat energy and reducing the heating time of the high-pressure nitrogen, thereby improving the vulcanization efficiency.

[0035] Optionally, as attached Figure 9 As shown, the present invention is provided with a second pressurizing device 20 between the purity detector 18 and the low-pressure recovery tank 15 to further pressurize the nitrogen in the vacuum tank 16 to facilitate the introduction of the nitrogen into the low-pressure recovery tank 15 for temporary storage.

[0036] Also as attached Figure 10 As shown, the present invention further discloses a tire vulcanization system 100, comprising a vulcanizer 2 and an air supply and recovery system 1 for an inert gas vulcanization medium as described above, wherein the vulcanizer 2 is respectively connected to the high-pressure air supply line H, the shaping air supply line D, the high-pressure recovery line HR, the low-pressure recovery line LR, and the exhaust line P in the air supply and recovery system. Therefore, the tire vulcanization system 100 can improve the nitrogen utilization rate when the vulcanizer 2 uses pure nitrogen as the vulcanization medium through the air supply and recovery system 1 for the inert gas vulcanization medium, thereby reducing nitrogen waste. As can be expected, in the prior art, in addition to nitrogen waste, the newly added nitrogen needs to be heated and pressurized, and the heating and pressurization operations require additional energy consumption and time to complete. Therefore, the technical solution of the present application can also reduce the energy consumption and working hours when vulcanizing a single tire.

[0037] Also as attached Figure 11 As shown, the present invention also discloses a tire vulcanization system 100, comprising a vulcanizer 2; and an inert gas vulcanization medium supply and recovery system 1 as described above, wherein the vulcanizer 2 is respectively connected to the high-pressure gas supply line H, the shaping gas supply line D, the high-pressure recovery line HR, the low-pressure recovery line LR, and the exhaust line P in the gas supply and recovery system. A second pressurizing device 20 is provided between the purity detector 18 and the low-pressure recovery tank 15. Similarly, the tire vulcanization system 100 can improve the nitrogen utilization rate when the vulcanizer 2 uses pure nitrogen as the vulcanization medium through the inert gas vulcanization medium supply and recovery system 1, thereby reducing nitrogen waste. As can be expected, in the prior art, in addition to nitrogen waste, the newly added nitrogen needs to be heated and pressurized, and these heating and pressurization operations require additional energy and time to complete. Therefore, the technical solution of the present application can also reduce energy consumption and working hours when vulcanizing a single tire.

[0038] From the above disclosed technical content, it can be seen that the gas supply and recovery system for the inert gas vulcanization medium described in the present invention mainly uses pure nitrogen as the vulcanization medium and combines it with the vulcanization process of the electrically heated outer mold. By designing a nitrogen recovery structure specifically for this new vulcanization process, the technical effect of significantly improving the nitrogen recovery rate is achieved.

[0039] The above content is only a partial embodiment of this application, and its purpose is to illustrate the technical concept and features of this application. Any equivalent changes or replacement technical solutions that can be easily conceived by those skilled in the art based on the technical content of this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A gas supply and recovery system for an inert gas vulcanization medium, comprising a gas supply device, a pressure boosting device, a high-pressure tank and a shaping tank, characterized in that: It also includes a low-pressure recovery tank, a vacuum tank, a vacuum pump and a purity detector; wherein, the air supply device is connected to the high-pressure tank after passing through the fourth valve assembly and the boosting device, and the high-pressure tank is connected to the high-pressure air supply pipeline; the air supply device is connected to the shaping tank after passing through the fourth valve assembly and the seventh valve assembly, and the shaping tank is connected to the shaping air supply pipeline after passing through the fifth valve assembly, and the shaping tank is also connected to the high-pressure recovery pipeline; the low-pressure recovery tank is connected to the high-pressure tank after passing through the sixth valve assembly and the boosting device, and the low-pressure recovery The tank is connected to the shaping tank after passing through the sixth valve assembly and the seventh valve assembly, and the low-pressure recovery tank is connected to the low-pressure recovery pipeline; the vacuum tank is connected to the exhaust pipeline, and the vacuum tank is connected to the low-pressure recovery tank after passing through the vacuum pump and the purity detector; the high-pressure tank is connected to the shaping tank through the first valve assembly; the shaping tank is connected to the high-pressure tank after passing through the second valve assembly and the boosting device; when the nitrogen in the shaping tank is insufficient, the first valve assembly is opened and controlled to replenish the nitrogen in the high-pressure tank into the shaping tank according to the required amount.

2. The inert gas vulcanization medium supply and recovery system according to claim 1, characterized in that: The high-pressure recovery pipeline is respectively provided with a third valve assembly, a heat exchanger, a first steam-water separator and a first filter from the side close to the shaping tank.

3. The inert gas vulcanization medium supply and recovery system according to claim 2, characterized in that: The heat exchanger is a four-way heat exchanger, and the high-pressure tank is communicated with the heat exchanger.

4. The inert gas vulcanization medium supply and recovery system according to claim 1, characterized in that: The low-pressure recovery pipeline is provided with a second steam-water separator and a second filter, and the second steam-water separator is arranged close to one side of the low-pressure recovery tank.

5. The inert gas vulcanization medium supply and recovery system according to claim 1, characterized in that: The exhaust pipeline is provided with a third steam-water separator and a third filter, and the third steam-water separator is arranged close to one side of the vacuum tank.

6. The inert gas vulcanization medium supply and recovery system according to any one of claims 1 to 5, characterized in that: The pressure value of the high-pressure tank is 2.0 MPa to 3.5 MPa; the pressure value of the shaping tank is 0.5 MPa to 1 MPa; the pressure value of the low-pressure recovery tank is 0.1 MPa to 0.5 MPa.

7. A tire vulcanizing system comprising a vulcanizing press, characterized in that: It also includes an inert gas vulcanization medium gas supply and recovery system as described in any one of claims 1 to 6, and the vulcanizer is respectively connected to the high-pressure gas supply pipeline, the shaping gas supply pipeline, the high-pressure recovery pipeline, the low-pressure recovery pipeline and the exhaust pipeline in the gas supply and recovery system.

Images