Unpowered self-circulation nitrogen recovery device

Abstract

The utility model discloses an unpowered self-circulation nitrogen recovery device, which relates to the field of modification of tire bladder vulcanizers and comprises a vulcanizer bladder, a gas supply pipe, a gas exhaust pipeline and a nitrogen self-circulation assembly, the gas supply pipe and the gas exhaust pipeline are connected to the vulcanizer bladder, and the nitrogen self-circulation assembly is connected to the vulcanizer bladder in parallel. The first branch is directly communicated with a high-pressure gas storage tank, the second branch is communicated with a low-pressure gas storage tank after being serially connected with a nitrogen recovery tank and a second pressure reducing valve, and the vulcanizing machine capsule is respectively communicated with the gas inlet ends of the high-pressure gas storage tank and the low-pressure gas storage tank through a nitrogen self-circulation assembly; the device has the technical advantages that the nitrogen self-circulation assembly is arranged for nitrogen recovery, after vulcanization is completed, the nitrogen self-circulation assembly is opened, and the high-pressure part of nitrogen in the capsule flows back into the nitrogen energy storage tank, so that the supplemented nitrogen and the backflow nitrogen are in a parallel connection relation in the subsequent vulcanization operation, and then cyclic utilization of the nitrogen is achieved.

Description

Technical Field

[0001] The present application relates to the field of tire bladder vulcanizer modification, and in particular to an unpowered self-circulating nitrogen recovery device. Background Art

[0002] The tire bladder vulcanizer is a key equipment in the tire production process. It is used to vulcanize the unvulcanized tire bladder under high temperature and high pressure conditions to ensure the performance and quality of the tire. During the vulcanization process, in order to ensure the vulcanization effect and improve production efficiency, an air compressor is required to provide compressed air to the nitrogen machine.

[0003] However, the existing vulcanizer still has some deficiencies in design and function. The air compressor provides compressed air to the nitrogen machine, which separates the nitrogen through a molecular sieve and removes moisture through a cold dryer. The nitrogen is then stored in a low-pressure gas tank waiting for pressurization. After being pressurized by a booster pump, the high-pressure nitrogen that can be transported throughout the factory is transported to the vicinity of the vulcanizer through a pipeline. When our tires are vulcanized, the nitrogen needs to be discharged directly into the air. This treatment method causes a waste of nitrogen resources. How to effectively and reasonably utilize this part of the nitrogen has become a technical problem that technicians in this field urgently need to solve. Summary of the Invention

[0004] This device provides a non-powered self-circulating nitrogen recovery device, the specific implementation is as follows:

[0005] A non-powered self-circulating nitrogen recovery device, comprising:

[0006] The vulcanizer bladder and the air supply pipe and exhaust pipe connected to the vulcanizer bladder are connected in series with a high-pressure air tank, a booster and a low-pressure air tank. The air inlet end of the low-pressure air tank is connected to a cold dryer and a nitrogen generator. External compressed air is introduced into the vulcanizer bladder from the nitrogen generator.

[0007] The nitrogen self-circulation component is connected in parallel to the vulcanizer capsule, which includes a recovery pipeline. The recovery pipeline is divided into two branches. The first branch is directly connected to the high-pressure gas tank, and the second branch is connected to the low-pressure gas tank after being connected in series with the nitrogen recovery tank and the second pressure reducing valve. The vulcanizer capsule is connected to the air inlet ends of the high-pressure gas tank and the low-pressure gas tank respectively through the nitrogen self-circulation component, and the pressure reduction treatment of the nitrogen refluxed into the low-pressure gas tank is achieved through the second pressure reducing valve; the nitrogen pressure of the high-pressure gas tank is 2.5Mpa, the nitrogen pressure of the low-pressure gas tank is 0.6Mpa, and the nitrogen pressure of the nitrogen recovery tank is greater than or equal to 0.7Mpa. If the nitrogen in the nitrogen recovery tank wants to flow into the low-pressure gas tank, the pressure reduction treatment must be performed.

[0008] Based on the above technical solution, a set of nitrogen self-circulation components is added for nitrogen recovery before the nitrogen in the vulcanizer capsule is discharged. After the vulcanization is completed, the nitrogen self-circulation component is opened for 6 seconds, and the high-pressure part of the nitrogen in the capsule flows back to the nitrogen energy storage tank; after the nitrogen energy storage tank is full, the exhaust pipeline is opened again to discharge nitrogen; the nitrogen that has been connected to the nitrogen energy storage tank, when the pressure is greater than the 0.6MPa pressure at the front end of the booster, will flow along the pipeline to the low-pressure gas storage tank, and be in parallel with the low-pressure nitrogen generated by the front-end nitrogen machine for recycling.

[0009] Preferably, the gas supply pipe includes a plurality of branch pipes arranged in parallel, each branch pipe is connected in series with any number of first pressure reducing valves, and the total pressure reducing specifications of the first pressure reducing valves on each branch pipe are different.

[0010] Based on the above technical solution, there can be one or no first pressure reducing valve on the branch pipe. By selecting the pressure reducing specifications of the first pressure reducing valve, the branch pipe can alternately output nitrogen of different pressures, that is, the 2.5Mpa nitrogen is decomposed into three types of nitrogen pressures of 2.5Mpa, 1.4Mpa, and 0.3Mpa through the pressure reducing valve; due to process requirements, the capsule needs to be shaped with 0.3Mpa gas first, and then the vulcanizer can be molded, and then 1.4Mpa nitrogen is introduced multiple times to increase the flow of the rubber material, and then 2.5Mpa high pressure is introduced for final vulcanization.

[0011] Preferably, each branch pipe, exhaust pipe and recovery pipe is connected in series with a gate valve.

[0012] Based on the above technical solution, nitrogen supply is prone to leakage or insufficient supply under high-pressure environment, affecting the vulcanization effect and product quality. Gate valves are installed in each pipeline. When any pipeline is in operation, the remaining pipelines are closed, which can effectively prevent nitrogen leakage. This not only improves the utilization rate of nitrogen, but also ensures the safety of the system.

[0013] Preferably, a control valve group is connected in series on the main line in the recovery pipeline.

[0014] Preferably, a control valve group is also connected in series to the second branch of the recovery pipeline, and is located at the gas outlet end of the nitrogen recovery tank.

[0015] Preferably, the control valve group is composed of a filter and a one-way valve, and stop valves are installed at both ends.

[0016] Preferably, the second pressure reducing valve is installed between the two stop valves in the control valve group.

[0017] Based on the above technical solution, by setting up a control valve group, the connection relationship with the high-pressure gas storage tank can be flexibly selected according to the actual nitrogen pressure conditions, which not only improves the utilization rate of nitrogen, but also enhances the flexibility and reliability of the system; the recovered nitrogen is graded, and the nitrogen above 0.7Mpa is stored in the nitrogen recovery tank for use in the high-pressure gas storage tank; through the time-sharing opening of the two control valve groups, the nitrogen below 0.7Mpa can be introduced into the low-pressure gas storage tank for secondary utilization after decompression, or it can be discharged to the outside after decompression.

[0018] In summary, this application has the following beneficial technical effects:

[0019] 1. The utility model is provided with a nitrogen self-circulating component for nitrogen recovery. After the vulcanization is completed, the nitrogen self-circulating component is opened, and the high-pressure part of the nitrogen in the capsule is refluxed into the nitrogen energy storage tank, so that the low-pressure nitrogen and the reflux nitrogen in the subsequent vulcanization operation are in parallel, thereby realizing the recycling of nitrogen;

[0020] 2. The utility model has a simple structure. By setting a nitrogen self-circulation component and two control valve groups, the nitrogen in the capsule can be recovered to the high-pressure gas storage tank at the rear end of the booster. That is, the main body only takes the recovered nitrogen to replenish the high-pressure gas storage tank, and the nitrogen less than 0.7Mpa is discharged after depressurization. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the utility model;

[0022] Figure 2 This utility model Figure 1 A magnified view of the structure of the middle and front half;

[0023] Figure 3 This utility model Figure 1 A magnified view of the structure in the middle and rear half;

[0024] Figure 4 This is a structural diagram of the nitrogen inlet and outlet process in the utility model;

[0025] Figure 5 It is a structural schematic diagram of the nitrogen recovery process in the utility model.

[0026] Description of reference numerals:

[0027] 1. Curing machine bladder, 2. Air supply pipe, 3. Exhaust pipe, 4. Recovery pipe, 5. High-pressure gas storage tank, 6. Booster, 7. Low-pressure gas storage tank, 9. Nitrogen self-circulation component, 10. Cold dryer, 11. Nitrogen generator, 12. Gate valve, 13. First check valve,

[0028] 201, first pressure reducing valve, 202, branch pipe,

[0029] 901. Nitrogen recovery tank, 902. Second stop valve, 903. First filter, 904. Second one-way valve, 905. Second pressure reducing valve, 906. Third one-way valve, 907. Third stop valve, 908. Second filter. DETAILED DESCRIPTION

[0030] The following describes the specific implementation of the utility model with reference to the accompanying drawings and embodiments:

[0031] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present utility model. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this utility model without affecting the efficacy and purpose that can be achieved by the present utility model.

[0032] At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships should also be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0033] The following is combined with Figure 1-5 This application is described in further detail.

[0034] The embodiment of the present application discloses a nitrogen recovery device with unpowered self-circulation.

[0035] Example 1

[0036] Reference Figures 1 to 5 This embodiment discloses a non-powered self-circulating nitrogen recovery device, including a vulcanizing machine capsule 1, the nitrogen pipelines of the vulcanizing machine capsule 1 are arranged in parallel, one of which is connected to the nitrogen self-circulating component 9, and the other is connected to the air supply pipe 2 and the exhaust pipe 3. The air supply pipe 2 is sequentially connected in series with a high-pressure gas storage tank 5, a supercharger 6 and a low-pressure gas storage tank 7. The air inlet end of the low-pressure gas storage tank 7 is connected to a cold dryer 10 and a nitrogen generator 11. External compressed air is introduced into the vulcanizing machine capsule 1 from the nitrogen generator 11. The nitrogen self-circulation component 9 in the structure includes a recovery pipeline 4, which is divided into two branches. The first branch is directly connected to the high-pressure gas tank 5, and the second branch is connected to the low-pressure gas tank 7 after being connected in series with the nitrogen recovery tank 901 and the second pressure reducing valve 905. The vulcanizer capsule 1 is connected to the air inlet ends of the high-pressure gas tank 5 and the low-pressure gas tank 7 respectively through the nitrogen self-circulation component 9, and the pressure reduction treatment of the nitrogen refluxed into the low-pressure gas tank 7 is realized through the second pressure reducing valve 905.

[0037] The air supply pipe 2 includes three branch pipes 202 arranged in parallel. The first branch pipe 202 is not connected in series with the first pressure reducing valve 201 and is used to deliver 2.5Mpa nitrogen to the vulcanizer bladder 1. The second branch pipe 202 is connected in series with the first pressure reducing valve 201 and is used to deliver 1.4Mpa nitrogen to the vulcanizer bladder 1. The third branch pipe 202 is connected in series with the first pressure reducing valve 201 and is used to deliver 0.3Mpa nitrogen to the vulcanizer bladder 1. That is, the total pressure reducing specifications of the first pressure reducing valve 201 on each branch pipe 202 are different. In this structure, each branch pipe 202, exhaust pipeline 3 and recovery pipeline 4 are connected in series with a gate valve 12.

[0038] Example 2

[0039] Reference Figures 3 to 5 Based on Example 1, this embodiment also discloses a non-powered self-circulating nitrogen recovery device, which also includes two control valve groups. The first control valve group is connected in series on the main line of the recovery pipeline 4, and the second control valve group is connected in series on the second branch line of the recovery pipeline 4. The second control valve group is located at the outlet end of the nitrogen recovery tank 901. In this structure, the control valve group is arranged to realize the regulation of the nitrogen reflux range of the nitrogen self-circulating component 9, that is, whether the nitrogen recovery tank 901 needs to be connected to the low-pressure gas storage tank 7, and whether the nitrogen reflux is turned on.

[0040] The first control valve group is composed of a third one-way valve 906 and a second filter 908 connected in series, and a third stop valve 907 is installed at the front and rear ends of the two; the second control valve group is composed of a first filter 903, a second one-way valve 904 and a second pressure reducing valve 905 connected in series, and a second stop valve 902 is installed at the front and rear ends of the three.

[0041] The specific implementation process is as follows: compressed air enters the low-pressure gas storage tank 7 through the cold dryer 10 and the nitrogen machine 11, and the nitrogen pressure is increased by the booster 6 and enters the high-pressure gas storage tank 5; according to the different operating states of the vulcanizer capsule 1, the branch pipe 202 with appropriate nitrogen pressure is selected in turn for transportation; after the vulcanization is completed, the recovery pipeline 4 and the nitrogen self-circulation component 9 are opened to transport the reflux nitrogen to the high-pressure gas storage tank 5 to meet the demand for use of the nitrogen medium-pressure section; the nitrogen below 0.7Mpa in the nitrogen recovery tank 901 is directly discharged into the environment or re-introduced into the low-pressure gas storage tank 7 for use after the pressure reduction treatment of the second pressure reducing valve 905; after the nitrogen recovery tank 901 collects enough, the recovery pipeline 4 is closed and the exhaust pipeline 3 is opened to discharge the remaining nitrogen to the outside.

[0042] Many other changes and modifications can be made without departing from the concept and scope of the present invention. It should be understood that the present invention is not limited to specific embodiments, and the scope of the present invention is defined by the appended claims.

Claims

1. A non-powered self-circulating nitrogen recovery device, characterized in that: include: A vulcanizer bladder (1) and an air supply pipe (2) and an exhaust pipe (3) connected to the vulcanizer bladder (1); a high-pressure air storage tank (5), a supercharger (6) and a low-pressure air storage tank (7) are sequentially connected in series to the air supply pipe (2); an air inlet end of the low-pressure air storage tank (7) is connected to a cold dryer (10) and a nitrogen generator (11); external compressed air is introduced into the vulcanizer bladder (1) from the nitrogen generator (11); A nitrogen self-circulating component (9) is connected to the vulcanizing machine bladder (1), comprising a recovery line (4), wherein the recovery line (4) is divided into two branches, the first branch being directly connected to the high-pressure gas storage tank (5), and the second branch being connected to the low-pressure gas storage tank (7) after being connected in series with a nitrogen recovery tank (901) and a second pressure reducing valve (905). The vulcanizing machine bladder (1) is connected to the air inlet ends of the high-pressure gas storage tank (5) and the low-pressure gas storage tank (7) respectively through the nitrogen self-circulating component (9), and the nitrogen discharged from the nitrogen recovery tank (901) is subjected to pressure reduction treatment through the second pressure reducing valve (905).

2. The unpowered self-circulating nitrogen recovery device according to claim 1, characterized in that: The gas supply pipe (2) comprises a plurality of branch pipes (202) arranged in parallel, each branch pipe (202) is connected in series with any number of first pressure reducing valves (201), and the total pressure reducing specifications of the first pressure reducing valves (201) on each branch pipe (202) are different.

3. The unpowered self-circulating nitrogen recovery device according to claim 2, characterized in that: Each of the branch pipes (202), the exhaust pipeline (3) and the recovery pipeline (4) is serially connected with a gate valve (12).

4. The unpowered self-circulating nitrogen recovery device according to claim 1, characterized in that: A control valve group is serially connected to the main line of the recovery pipeline (4).

5. The unpowered self-circulating nitrogen recovery device according to claim 4, characterized in that: A control valve group is also connected in series to the second branch of the recovery pipeline (4), and is located at the gas outlet end of the nitrogen recovery tank (901).

6. The unpowered self-circulating nitrogen recovery device according to claim 5, characterized in that: The control valve group consists of a filter and a one-way valve, and stop valves are installed at both ends.

7. The unpowered self-circulating nitrogen recovery device according to claim 6, characterized in that: The second pressure reducing valve (905) is installed between the two stop valves in the control valve group.

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