High-low pressure compressed air self-adaptive control system for two-piece can production

Abstract

The invention relates to the technical field of two-piece can production equipment, and discloses a high-low pressure compressed air self-adaptive control system for two-piece can production, which comprises a central control system, an air compressor module, a first high-pressure pipeline, a first low-pressure pipeline, a freezing dryer module, a second high-pressure pipeline, a second low-pressure pipeline and a two-piece can production equipment module, the air compressor module is provided with a first valve group, the freezing dryer module is provided with a second valve group and a third valve group, and the two-piece can production equipment module is provided with a high-pressure valve group and a low-pressure valve group; the air compressor module, the first valve set, the second valve set, the third valve set, the two-piece can production equipment module, the high-pressure valve set and the low-pressure valve set are electrically connected with the central control system. According to the high-low pressure compressed air self-adaptive control system for two-piece can production, high-low pressure distribution can be carried out, high-pressure low use of compressed air is avoided, the air compressor works in the optimal energy-saving state through reasonable allocation, energy waste is reduced, and the production cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of two-piece can production equipment, and in particular to a high- and low-pressure compressed air adaptive control system for two-piece can production. Background Art

[0002] Currently, all equipment on a two-piece can production line requires compressed air, and different equipment requires different compressed air pressures and flows. Traditional two-piece can workshops typically design their compressed air systems based on the equipment's maximum required pressure. These systems are connected via pipes to the various equipment points, and then adjusted to the required pressure via pressure reducing valves. The typical operating pressure is 7.0-8.0 bar. In actual two-piece can production lines, the necking and cupping processes consume the most compressed air, accounting for over 60% of total compressed air usage. These processes require only around 4.0 bar, which is reduced by a pressure reducing valve. This high-pressure, low-volume compressed air usage results in unnecessary energy loss, increased energy consumption, and increased production costs. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide a high- and low-pressure compressed air adaptive control system for two-piece can production that can perform high- and low-pressure diversion, avoid high-pressure and low-use of compressed air, and reasonably adjust the air compressor to work in the best energy-saving state, reduce energy waste, and reduce production costs.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: A high- and low-pressure compressed air adaptive control system for two-piece can production includes a central control system, an air compressor module, a cold dryer module, and a two-piece can production equipment module. A first high-pressure pipeline and a first low-pressure pipeline are connected between the air compressor module and the cold dryer module, and a second high-pressure pipeline and a second low-pressure pipeline are connected between the cold dryer module and the two-piece can production equipment module. The output end of the air compressor module is provided with a first valve group, the output end A of the first valve group is connected to the first high-pressure pipeline, and the output end B of the first valve group is connected to the first low-pressure pipeline; the input end of the cold dryer module is provided with a second valve group, the input end A of the second valve group is connected to the first high-pressure pipeline, and the input end B of the second valve group is connected to the first low-pressure pipeline; the output end of the cold dryer module is provided with a third valve group, the output end A of the third valve group is connected to the second high-pressure pipeline, and the output end B of the third valve group is connected to the second low-pressure pipeline; the input end of the two-piece can production equipment module is provided with a high-pressure valve group and a low-pressure valve group, the input end of the high-pressure valve group is connected to the second high-pressure pipeline, and the input end of the low-pressure valve group is connected to the second low-pressure pipeline; The air compressor module, the first valve group, the second valve group, the third valve group, the two-piece can production equipment module, the high-pressure valve group, and the low-pressure valve group are electrically connected to the central control system respectively.

[0005] As a further improvement of the above technical solution: The air compressor module includes several groups of air compressors, and the first valve group includes several groups of first three-way valves. The first three-way valves are arranged in a one-to-one correspondence with the air compressors.

[0006] The cold dryer module includes several groups of cold dryers, the second valve group includes several groups of second three-way valves, the third valve group includes several groups of third three-way valves, and the second three-way valves and the third three-way valves are arranged in a one-to-one correspondence with the cold dryers.

[0007] The two-piece can production equipment module includes several groups of cup making machines, several groups of necking machines, several groups of stretching machines, and several groups of color printing machines. The high-pressure valve group includes several groups of first ball valves, which are arranged in a one-to-one correspondence with the cup making machines, the necking machines, the stretching machines, and the color printing machines. The low-pressure valve group includes several groups of second ball valves, which are arranged in a one-to-one correspondence with the cup making machines and the necking machines.

[0008] A first high-pressure gas storage tank is provided in the first high-pressure pipeline, a first low-pressure gas storage tank is provided in the first low-pressure pipeline, a second high-pressure gas storage tank is provided in the second high-pressure pipeline, and a second low-pressure gas storage tank is provided in the second low-pressure pipeline.

[0009] The input end of the first high-pressure gas storage tank is provided with a third ball valve, and the output end is provided with a fourth ball valve, the input end of the first low-pressure gas storage tank is provided with a fifth ball valve, and the output end is provided with a sixth ball valve, the input end of the second high-pressure gas storage tank is provided with a seventh ball valve, and the output end is provided with an eighth ball valve, the input end of the second low-pressure gas storage tank is provided with a ninth ball valve, and the output end is provided with a tenth ball valve.

[0010] An emergency one-way compensation valve is connected between the second high-pressure pipeline and the second low-pressure pipeline.

[0011] Compared with the prior art, the advantages of the present invention are: The high- and low-pressure compressed air adaptive control system for two-piece can production of the present invention includes a high-pressure compressed air pipeline system composed of an air compressor module, a first high-pressure pipeline, a cold dryer module and a second high-pressure pipeline, a low-pressure compressed air pipeline system composed of an air compressor module, a first low-pressure pipeline, a cold dryer module and a second low-pressure pipeline, and an intelligent control system composed of an air compressor module, a first valve group, a second valve group, a third valve group, a two-piece can production equipment module, a high-pressure valve group and a low-pressure valve group electrically connected to a central control system. The central control system controls the first valve group. The switching actions of the first valve group, the second valve group, the third valve group, the high-pressure valve group and the low-pressure valve group can flexibly switch the high-pressure compressed air pipeline system and the low-pressure compressed air pipeline system according to actual production needs. At the same time, according to the status information of the two-piece can production equipment module and the main air circuit pressure information, it can reasonably allocate and control the working status of the air compressor module, so that the air compressor module can work in the best energy-saving state, realize high- and low-pressure diversion of the system, avoid high-pressure and low-use of compressed air, cause unnecessary energy loss, reduce energy waste, and thus save electricity for the air compressor module and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 Schematic diagram of the framework of the high and low pressure compressed air adaptive control system for two-piece can production.

[0013] Figure 2 This is a piping schematic diagram of the high and low pressure compressed air adaptive control system for two-piece can production.

[0014] Figure 3 This is a comparison chart of energy consumption before and after the transformation of the high- and low-pressure compressed air adaptive control system for two-piece can production.

[0015] Legend: 100. Central control system; 1. Air compressor module; 101. Air compressor; 2. Cold dryer module; 201. Cold dryer; 3. Two-piece can production equipment module; 301. Cup punching machine; 302. Necking machine; 303. Stretching machine; 304. Color printing machine; 4. First high-pressure pipeline; 401. First high-pressure gas storage tank; 402. Third ball valve; 403. Fourth ball valve; 5. First low-pressure pipeline; 501. First low-pressure gas storage tank; 502. Fifth ball valve; 503. Sixth ball valve; 6. Second high-pressure Pipeline; 601, second high-pressure gas storage tank; 602, seventh ball valve; 603, eighth ball valve; 7, second low-pressure pipeline; 701, second low-pressure gas storage tank; 702, ninth ball valve; 703, tenth ball valve; 8, first valve group; 801, first three-way valve; 9, second valve group; 901, second three-way valve; 10, third valve group; 1001, third three-way valve; 11, high-pressure valve group; 1101, first ball valve; 12, low-pressure valve group; 1201, second ball valve; 13, emergency one-way compensation valve. DETAILED DESCRIPTION

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] like Figure 1 and Figure 2As shown, the high and low pressure compressed air adaptive control system for the production of two-piece cans in this embodiment includes a central control system 100, an air compressor module 1, a cold dryer module 2 and a two-piece can production equipment module 3. A first high-pressure pipeline 4 and a first low-pressure pipeline 5 are connected between the air compressor module 1 and the cold dryer module 2, and a second high-pressure pipeline 6 and a second low-pressure pipeline 7 are connected between the cold dryer module 2 and the two-piece can production equipment module 3; a first valve group 8 is provided at the output end of the air compressor module 1, and an output end A of the first valve group 8 is connected to the first high-pressure pipeline 4, and an output end B of the first valve group 8 is connected to the first low-pressure pipeline 5; a second valve group 9 is provided at the input end of the cold dryer module 2, and an input end A of the second valve group 9 is connected to the first high-pressure pipeline 4. The air compressor module 1, the first valve group 8, the second valve group 9, the third valve group 10, the two-piece can production equipment module 3, the high-pressure valve group 11 and the low-pressure valve group 12 are electrically connected to the central control system 100 respectively. The high- and low-pressure compressed air adaptive control system for two-piece can production includes a high-pressure compressed air pipeline system composed of an air compressor module 1, a first high-pressure pipeline 4, a cold dryer module 2 and a second high-pressure pipeline 6, a low-pressure compressed air pipeline system composed of an air compressor module 1, a first low-pressure pipeline 5, a cold dryer module 2 and a second low-pressure pipeline 7, and an intelligent control system composed of an air compressor module 1, a first valve group 8, a second valve group 9, a third valve group 10, a two-piece can production equipment module 3, a high-pressure valve group 11 and a low-pressure valve group 12 electrically connected to a central control system 100. The central control system 100 adopts an industrial computer and a PLC. The programmed logic controller can flexibly switch the high-pressure compressed air pipeline system and the low-pressure compressed air pipeline system according to actual production needs by controlling the switching actions of the first valve group 8, the second valve group 9, the third valve group 10, the high-pressure valve group 11 and the low-pressure valve group 12. At the same time, it can reasonably adjust and control the working state of the air compressor module 1 according to the status information of the two-piece can production equipment module 3 and the main air circuit pressure information, so that the air compressor module 1 can work in the best energy-saving state, realize high-pressure and low-pressure diversion of the system, avoid high-pressure and low-use of compressed air, cause unnecessary energy loss, reduce energy waste, and thus save electricity for the air compressor module 1 and reduce production costs.

[0018] Preferably, the air compressor module 1 includes several groups of air compressors 101 , and the first valve group 8 includes several groups of first three-way valves 801 , and the first three-way valves 801 are arranged in a one-to-one correspondence with the air compressors 101 .

[0019] Preferably, the cold dryer module 2 includes several groups of cold dryers 201, the second valve group 9 includes several groups of second three-way valves 901, and the third valve group 10 includes several groups of third three-way valves 1001. The second three-way valves 901 and the third three-way valves 1001 are provided in a one-to-one correspondence with the cold dryers 201. It should be noted that in this embodiment, the cold dryers 201 are used to dry compressed air.

[0020] Preferably, the two-piece can production equipment module 3 includes several groups of cup making machines 301, several groups of necking machines 302, several groups of stretching machines 303, and several groups of color printing machines 304. The high-pressure valve group 11 includes several groups of first ball valves 1101, and the first ball valves 1101 are arranged in a one-to-one correspondence with the cup making machines 301, the necking machines 302, the stretching machines 303 and the color printing machines 304. The low-pressure valve group 12 includes several groups of second ball valves 1201, and the second ball valves 1201 are arranged in a one-to-one correspondence with the cup making machines 301 and the necking machines 302. In this embodiment, since the necking and cup-making processes consume the most compressed air, and the pressure only needs to be around 4.0 Bar, both the first ball valve 1101 and the second ball valve 1201 are provided at the input ends of the cup-making machine 301 and the necking machine 302. Generally, the cup-making machine 301 and the necking machine 302 use low-pressure compressed air through the first low-pressure pipeline 5, the second low-pressure pipeline 7, and the second ball valve 1201. The compressed air pressure of the stretching process, the color printing process, and other processes is between 7.0 and 8.0 Bar. Therefore, only the first ball valve 1101 is provided at the input ends of the stretching machine 303, the color printing machine 304 and other equipment. The stretching machine 303, the color printing machine 304 and other equipment use high-pressure compressed air through the first high-pressure pipeline 4, the second high-pressure pipeline 6 and the first ball valve 1101. In the abnormal case of failure of the low-pressure pipeline system, the cupping machine 301 and the necking machine 302 can also use high-pressure compressed air through the first high-pressure pipeline 4, the second high-pressure pipeline 6 and the first ball valve 1101 to maintain the normal operation of the two-piece can production line.

[0021] Preferably, a first high-pressure gas storage tank 401 is provided in the first high-pressure pipeline 4, a first low-pressure gas storage tank 501 is provided in the first low-pressure pipeline 5, a second high-pressure gas storage tank 601 is provided in the second high-pressure pipeline 6, and a second low-pressure gas storage tank 701 is provided in the second low-pressure pipeline 7. In this embodiment, a high-pressure gas storage tank is provided in the high-pressure pipeline, and a low-pressure gas storage tank is provided in the low-pressure pipeline. Since the start and stop of the necking machine 302 has a large impact on the low-pressure gas load, two gas storage tanks are provided on the upstream and downstream sides of the cold dryer 201. This can absorb air pressure fluctuations, provide stable airflow, reduce the impact of compressed air on equipment, and optimize system stability, energy efficiency, and safety.

[0022] Preferably, the input end of the first high-pressure gas storage tank 401 is provided with a third ball valve 402, and the output end is provided with a fourth ball valve 403; the input end of the first low-pressure gas storage tank 501 is provided with a fifth ball valve 502, and the output end is provided with a sixth ball valve 503; the input end of the second high-pressure gas storage tank 601 is provided with a seventh ball valve 602, and the output end is provided with an eighth ball valve 603; the input end of the second low-pressure gas storage tank 701 is provided with a ninth ball valve 702, and the output end is provided with a tenth ball valve 703. In this embodiment, by providing ball valves at the input and output ends of the high-pressure gas storage tank and the low-pressure gas storage tank, respectively, it is possible to achieve on-off control of the pipeline, quickly close the ball valves to isolate the gas storage tank in the event of leakage, overpressure, or system failure to prevent the accident from escalating, and realize the function of segmented maintenance of the system, completely isolating the gas storage tank from other parts of the system, ensuring the safety of maintenance personnel and improving safety.

[0023] Preferably, an emergency one-way compensating valve 13 is connected between the second high-pressure pipeline 6 and the second low-pressure pipeline 7. In this embodiment, the emergency one-way compensating valve 13 is provided between the second high-pressure pipeline 6 and the second low-pressure pipeline 7. Under normal circumstances, the high-pressure compressed air in the second high-pressure pipeline 6 cannot flow back into the second low-pressure pipeline 7. When the pressure in the second low-pressure pipeline 7 drops suddenly due to leakage, valve malfunction, or system failure, the emergency one-way compensating valve 13 automatically opens, allowing the high-pressure compressed air in the second high-pressure pipeline 6 to flow one-way into the second low-pressure pipeline 7, quickly compensating the pressure and maintaining the minimum operating pressure of the second low-pressure pipeline 7, thereby preventing damage to the two-piece can production equipment or system failure.

[0024] like Figure 3 As shown, before and after the implementation of the high- and low-pressure compressed air adaptive control system for the production of two-piece cans of the present invention, the output of different can types and the power consumption of the air compressor are compared. The 330-can type saves 564 kWh of electricity per million cans, and the 500-can type saves 1,191 kWh of electricity per million cans; based on the annual production of 1.5 billion cans of 330-type cans and 250 million cans of 500-type cans, 1.145 million kWh of electricity can be saved annually, and at 0.78 yuan per kWh, 892,300 yuan can be saved, thereby verifying that the high- and low-pressure compressed air adaptive control system for the production of two-piece cans of the present invention has the advantages of energy saving, cost reduction and efficiency improvement, automation and intelligent management.

[0025] The above is only a preferred embodiment of the present invention, and the scope of protection of the present invention is not limited to the above embodiment. For those skilled in the art, improvements and modifications obtained without departing from the technical concept of the present invention should also be considered as the scope of protection of the present invention.

Claims

1. A high and low pressure compressed air adaptive control system for two-piece can production, characterized in that: The system comprises a central control system (100), an air compressor module (1), a cold dryer module (2), and a two-piece can production equipment module (3); a first high-pressure pipeline (4) and a first low-pressure pipeline (5) are connected between the air compressor module (1) and the cold dryer module (2); and a second high-pressure pipeline (6) and a second low-pressure pipeline (7) are connected between the cold dryer module (2) and the two-piece can production equipment module (3); The output end of the air compressor module (1) is provided with a first valve group (8), the output end A of the first valve group (8) is connected to the first high-pressure pipeline (4), and the output end B of the first valve group (8) is connected to the first low-pressure pipeline (5); the input end of the cold dryer module (2) is provided with a second valve group (9), the input end A of the second valve group (9) is connected to the first high-pressure pipeline (4), and the input end B of the second valve group (9) is connected to the first low-pressure pipeline (5). 2) is provided with a third valve group (10) at the output end, the output end A of the third valve group (10) is communicated with the second high-pressure pipeline (6), and the output end B of the third valve group (10) is communicated with the second low-pressure pipeline (7); the input end of the two-piece can production equipment module (3) is provided with a high-pressure valve group (11) and a low-pressure valve group (12), the input end of the high-pressure valve group (11) is communicated with the second high-pressure pipeline (6), and the input end of the low-pressure valve group (12) is communicated with the second low-pressure pipeline (7); The air compressor module (1), the first valve group (8), the second valve group (9), the third valve group (10), the two-piece can production equipment module (3), the high-pressure valve group (11), and the low-pressure valve group (12) are electrically connected to the central control system (100), respectively.

2. The high and low pressure compressed air adaptive control system for two-piece can production according to claim 1, characterized in that: The air compressor module (1) includes several groups of air compressors (101), and the first valve group (8) includes several groups of first three-way valves (801), and the first three-way valves (801) are arranged in a one-to-one correspondence with the air compressors (101).

3. The high and low pressure compressed air adaptive control system for two-piece can production according to claim 2, characterized in that: The cold dryer module (2) includes several groups of cold dryers (201), the second valve group (9) includes several groups of second three-way valves (901), and the third valve group (10) includes several groups of third three-way valves (1001). The second three-way valves (901) and the third three-way valves (1001) are arranged in a one-to-one correspondence with the cold dryers (201).

4. The high and low pressure compressed air adaptive control system for two-piece can production according to claim 3, characterized in that: The two-piece can production equipment module (3) includes several groups of cup making machines (301), several groups of necking machines (302), several groups of stretching machines (303), and several groups of color printing machines (304). The high-pressure valve group (11) includes several groups of first ball valves (1101), and the first ball valves (1101) are arranged in a one-to-one correspondence with the cup making machines (301), the necking machines (302), the stretching machines (303), and the color printing machines (304). The low-pressure valve group (12) includes several groups of second ball valves (1201), and the second ball valves (1201) are arranged in a one-to-one correspondence with the cup making machines (301) and the necking machines (302).

5. The high and low pressure compressed air adaptive control system for two-piece can production according to claim 4, characterized in that: A first high-pressure gas storage tank (401) is provided in the first high-pressure pipeline (4), a first low-pressure gas storage tank (501) is provided in the first low-pressure pipeline (5), a second high-pressure gas storage tank (601) is provided in the second high-pressure pipeline (6), and a second low-pressure gas storage tank (701) is provided in the second low-pressure pipeline (7).

6. The high and low pressure compressed air adaptive control system for two-piece can production according to claim 5, characterized in that: The input end of the first high-pressure gas storage tank (401) is provided with a third ball valve (402), and the output end is provided with a fourth ball valve (403); the input end of the first low-pressure gas storage tank (501) is provided with a fifth ball valve (502), and the output end is provided with a sixth ball valve (503); the input end of the second high-pressure gas storage tank (601) is provided with a seventh ball valve (602), and the output end is provided with an eighth ball valve (603); the input end of the second low-pressure gas storage tank (701) is provided with a ninth ball valve (702), and the output end is provided with a tenth ball valve (703).

7. The high and low pressure compressed air adaptive control system for two-piece can production according to claim 6, characterized in that: An emergency one-way compensation valve (13) is connected between the second high-pressure pipeline (6) and the second low-pressure pipeline (7).

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