Adjusting system of nitrogen air knife

Abstract

The utility model discloses an adjusting system of a nitrogen gas knife. A nitrogen pipeline comprises a nitrogen switch, a nitrogen adjusting valve and a gas storage tank. A first sensor is arranged between the nitrogen regulating valve and the gas storage tank; the gas storage tank is provided with a second sensor; the air pipeline comprises an air regulating valve and an air switch, and the air switch is connected with the air storage tank; the air adjusting valve and the air inlet are provided with a third sensor; the adjusting main path is connected with the gas storage tank and is provided with a fourth sensor and a nitrogen analyzer; the first input end of the control assembly is connected with the second sensor, the first output end is connected with the nitrogen adjusting valve, the second input end is connected with the fourth sensor, and the second output end is connected with the air adjusting valve. Nitrogen and air are supplied respectively, pressure information in the nitrogen pipeline and the adjusting main pipeline is obtained through the control assembly and compared with preset pressure information, and therefore the gas output of the nitrogen and the gas output of the air are adjusted; the nitrogen content in the mixed gas is controlled according to the nitrogen analyzer, the removal effect is ensured, and the nitrogen use cost is reduced.

Description

Technical Field

[0001] The utility model relates to an adjustment system for a nitrogen air knife, belonging to the technical field of hot-dip galvanizing. Background Art

[0002] A nitrogen air knife is an air knife that uses nitrogen as a working medium. It sprays nitrogen at high speed and high pressure through a specific nozzle or slit to form an air curtain or air flow for achieving various functions such as blowing, drying, cooling, and isolation, and is correspondingly applied to hot-dip galvanizing of steel strip, annealing furnace, and other industrial fields. For example, in the process of hot-dip galvanizing, due to the advantages of zinc-aluminum-magnesium plates such as corrosion resistance, self-healing property, and good welding performance, they have been widely used. Using an air knife to blow can eliminate zinc liquid, and using a nitrogen air knife can eliminate magnesium spots, thereby improving the surface quality of the plate.

[0003] However, there are also some problems in the specific use process of the above air knife. This is mainly because nitrogen is a relatively expensive industrial gas. Especially in the production process that requires a large amount of nitrogen air knives, the cost of nitrogen may become an important expense. Therefore, a system for precise adjustment of nitrogen use is needed, which can not only achieve the expected cleaning effect but also reduce the use cost. Summary of the Utility Model

[0004] Therefore, the purpose of the utility model is to provide an adjustment system for a nitrogen air knife to precisely adjust the nitrogen usage amount, thereby saving the use cost of nitrogen while ensuring the effective elimination of zinc liquid and magnesium spots.

[0005] To achieve the above purpose, on the one hand, the utility model provides an adjustment system for a nitrogen air knife, including:

[0006] A nitrogen gas pipeline, including a nitrogen gas switch, a nitrogen gas regulating valve, and a gas storage tank connected in sequence; a first sensor is provided between the nitrogen gas regulating valve and the gas storage tank; a second sensor is provided at the first output end of the gas storage tank;

[0007] An air pipeline, including an air regulating valve and an air switch connected in sequence, wherein one end of the air switch far from the air regulating valve is connected to the second output end of the gas storage tank; a third sensor is provided between the air regulating valve and the air inlet;

[0008] An adjustment main pipeline, which is respectively connected to the second output end of the gas storage tank, and a fourth sensor and a nitrogen analyzer are provided in the adjustment main pipeline;

[0009] A control component, its first input end is connected to the output end of the second sensor, its first output end is connected to the control input end of the nitrogen gas regulating valve, its second input end is connected to the output end of the fourth sensor, and its second output end is connected to the control input end of the air regulating valve.

[0010] Further, a first ball valve, a first filter, a pressure stabilizing valve, and a flow meter are also provided on the nitrogen gas pipeline;

[0011] One end of the nitrogen gas switch away from the nitrogen gas inlet side is connected to one end of the first ball valve, the other end of the first ball valve is connected to one end of the first filter, the other end of the first filter is connected to one end of the pressure stabilizing valve through a fifth sensor, the other end of the pressure stabilizing valve is connected to the input end of the flow meter through a sixth sensor, and the output end of the flow meter is connected to the gas input end of the nitrogen gas regulating valve.

[0012] Further, a first pressure gauge is provided between the first sensor and the nitrogen gas regulating valve, and a second pressure gauge is provided between the second sensor and the first output end of the gas storage tank.

[0013] Further, an air knife blower is connected to the end of the regulating main pipeline away from the gas storage tank;

[0014] The regulating main pipeline is provided with an air knife switch for controlling the air knife blower.

[0015] Further, a second ball valve and a second filter are also provided on the air pipeline;

[0016] One end of the air pipeline away from the air inlet is connected to one end of the second filter, and the other end of the second filter is connected to the gas input end of the air regulating valve through a third sensor.

[0017] Further, a third pressure gauge is provided between the third sensor and the second filter; a fourth pressure gauge is provided between the air regulating valve and the air switch.

[0018] Further, a fifth pressure gauge is provided between the fifth sensor and the first filter; a sixth pressure gauge is provided between the sixth sensor and the pressure stabilizing valve.

[0019] By adopting the above technical solution, for a nitrogen gas air knife regulating system provided by an embodiment of the present invention, nitrogen gas and air are respectively supplied by using a nitrogen gas pipeline and an air pipeline, and a control component is used to respectively obtain the pressure information in the nitrogen gas pipeline and the regulating main pipeline and compare it with the corresponding preset pressure information to adjust the gas outlet amounts of nitrogen gas and air; at the same time, the content of nitrogen gas in the mixed gas is accurately controlled according to a nitrogen analyzer, so as to ensure the cleaning effect while reducing the use cost of nitrogen gas. Description of the Drawings

[0020] Figure 1 It is an electrical connection diagram of a nitrogen gas air knife regulating system provided by the present invention.

[0021] In the figure: 1. Nitrogen pipeline; 2. Nitrogen switch; 3. Nitrogen regulating valve; 4. Gas storage tank; 5. First sensor; 6. Second sensor; 7. Air pipeline; 8. Air regulating valve; 9. Air switch; 10. Third sensor; 11. Total regulating circuit; 12. Fourth sensor; 13. Nitrogen analyzer; 14. First ball valve; 15. First filter; 16. Pressure stabilizing valve; 17. Flowmeter; 18. Fifth sensor; 19. Sixth sensor; 20. First pressure gauge; 21. Second pressure gauge; 22. Sixth pressure gauge; 23. Air knife switch; 24. Second ball valve; 25. Second filter; 26. Third pressure gauge; 27. Fourth pressure gauge; 28. Fifth pressure gauge. Detailed implementation manners

[0022] The present utility model will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0023] As Figure 1 shown, the present utility model provides an adjustment system for a nitrogen air knife, including:

[0024] The nitrogen pipeline 1 includes a nitrogen switch 2, a nitrogen regulating valve 3 and a gas storage tank 4 connected in sequence; a first sensor 5 is provided between the nitrogen regulating valve 3 and the gas storage tank 4; a second sensor 6 is provided at the first output end of the gas storage tank 4; the nitrogen pipeline 1 is usually arranged in a dedicated area, such as a gas protection station in a factory area to ensure gas use safety; and before use, the nitrogen switch 2 is in an off state, and usually the pressure value at the inlet of the nitrogen pipeline 1 is between 0.3 - 0.45 MPa, and a pressure gauge can be used to detect at the nitrogen inlet. The first sensor 5 is used to detect the pressure before nitrogen flows into the gas storage tank 4, and correspondingly, the second sensor 6 is used to detect the pressure of nitrogen in the gas storage tank 4. Both are pressure sensors, and the remaining sensors in this control system are also pressure sensors. And a first pressure gauge 20 is provided between the first sensor 5 and the nitrogen regulating valve 3, and a second pressure gauge 21 is provided between the second sensor 6 and the first output end of the gas storage tank 4. It should be noted here that the pressure sensor is used to obtain pressure data for subsequent processing or display, while the pressure gauge is provided because of the length of the nitrogen pipeline 1 and the air pipeline 7, and the pressure gauge can be used to observe in real time.

[0025] The above nitrogen pipeline 1 also needs to be provided with a first ball valve 14, a first filter 15, a pressure stabilizing valve 16 and a flowmeter 17; the function of using the first filter 15 is to filter impurities in nitrogen to avoid damage to the equipment caused by impurities. The function of using the flowmeter 17 is to count the usage of nitrogen.

[0026] One end of the nitrogen switch 2 away from the nitrogen inlet side is connected to one end of the first ball valve 14. The other end of the first ball valve 14 is connected to one end of the first filter 15. The other end of the first filter 15 is connected to one end of the pressure stabilizing valve 16 through the fifth sensor 18. The other end of the pressure stabilizing valve 16 is connected to the input end of the flowmeter 17 through the sixth sensor 19. The output end of the flowmeter 17 is connected to the gas input end of the nitrogen regulating valve 3. The function of the pressure stabilizing valve 16 is to adjust the pressure of nitrogen to the required range; the pressures on both sides of the pressure stabilizing valve 16 are detected by the fifth sensor 18 and the sixth sensor 19. In a preferred embodiment, a fifth pressure gauge 28 is provided between the fifth sensor 18 and the first filter 15; a sixth pressure gauge 22 is provided between the sixth sensor 19 and the pressure stabilizing valve 16. The functions of the fifth pressure gauge 28 and the sixth pressure gauge 22 are the same as those of the aforementioned pressure gauges, which will not be elaborated here.

[0027] The air pipeline 7 includes an air regulating valve 8 and an air switch 9 connected in sequence. One end of the air switch 9 away from the air regulating valve 8 is connected to the second output end of the air storage tank 4; a third sensor 10 is provided between the air regulating valve 8 and the air inlet; it should be noted here that the reason for setting the air switch 9 close to the air storage tank 4 is that in the mixing process of this system, nitrogen is introduced first and then air, and there is a risk of backflow.

[0028] The air pipeline 7 is also provided with a second ball valve 24 and a second filter 25; one end of the air pipeline 7 away from the air inlet is connected to one end of the second filter 25. The other end of the second filter 25 is connected to the gas input end of the air regulating valve 8 through the third sensor 10. A third pressure gauge 26 is provided between the third sensor 10 and the second filter 25; a fourth pressure gauge 27 is provided between the air regulating valve 8 and the air switch 9.

[0029] The regulating main line 11 is respectively connected to the second output end of the air storage tank 4. The regulating main line 11 is provided with a fourth sensor 12 and a nitrogen analyzer 13; the fourth sensor 12 is used to measure the pressure of the mixed gas (nitrogen and control), and the nitrogen analyzer 13 is used to detect that the proportion of nitrogen in the mixed gas meets the requirements.

[0030] The control component, a component with control functions, including but not limited to using a PLC; its first input end is connected to the output end of the second sensor 6, and its first output end is connected to the control input end of the nitrogen regulating valve 3; the PLC compares the information uploaded by the second sensor 6 with the preset pressure information of the air storage tank 4, and controls the opening and closing of the nitrogen regulating valve 3 according to the comparison result to form a PID control and adjust the output of nitrogen.

[0031] The second input terminal of the control component is connected to the output terminal of the sensor, and the second output terminal is connected to the control input terminal of the air regulating valve 8. Among them, the PLC obtains the pressure information of the mixed gas in the regulating main pipeline 11 and compares it with the preset pressure information of the regulating main pipeline 11, and adjusts the opening and closing of the air regulating valve 8 according to the comparison result to form a PID control to adjust the output volume of the mixed gas; and the control component will also use the nitrogen analyzer 13 to analyze the nitrogen content in the mixed gas, so as to accurately control the ratio of nitrogen to air, thereby ensuring the cleaning effect of the nitrogen air knife.

[0032] In addition, it should be noted that an air knife blower is connected to one end of the regulating main pipeline 11 away from the gas storage tank 4;

[0033] The regulating main pipeline 11 is provided with an air knife switch 23 for controlling the air knife blower. The air knife switch 23 is an electronic switch, which can control the air knife blower in a timely manner.

[0034] The adjustment system of a nitrogen air knife provided by the embodiment of the present invention adopts separate gas supply of nitrogen and air through a nitrogen pipeline and an air pipeline, and the control component respectively obtains the pressure information in the nitrogen pipeline and the regulating main pipeline and compares it with the corresponding preset pressure information to adjust the gas output volume of nitrogen and air; at the same time, accurately control the nitrogen content in the mixed gas according to the nitrogen analyzer, so as to ensure the cleaning effect while reducing the use cost of nitrogen.

[0035] Obviously, the above embodiments are only examples clearly described and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A nitrogen air knife adjustment system, characterized in that: include: A nitrogen pipeline (1) comprises a nitrogen switch (2), a nitrogen regulating valve (3) and a gas storage tank (4) which are connected in sequence; a first sensor (5) is provided between the nitrogen regulating valve (3) and the gas storage tank (4); a second sensor (6) is provided at a first output end of the gas storage tank (4); An air pipeline (7) comprises an air regulating valve (8) and an air switch (9) which are connected in sequence, wherein one end of the air switch (9) away from the air regulating valve (8) is connected to the second output end of the air storage tank (4); a third sensor (10) is provided between the air regulating valve (8) and the air inlet; A regulating main circuit (11) is respectively connected to the second output ends of the gas storage tanks (4), wherein the regulating main circuit (11) is provided with a fourth sensor (12) and a nitrogen analyzer (13); A control component, wherein a first input end is connected to the output end of the second sensor (6), a first output end is connected to the control input end of the nitrogen regulating valve (3), a second input end is connected to the output end of the fourth sensor (12), and a second output end is connected to the control input end of the air regulating valve (8).

2. The nitrogen air knife regulating system according to claim 1, characterized in that: The nitrogen pipeline (1) is also provided with a first ball valve (14), a first filter (15), a pressure regulating valve (16) and a flow meter (17); The end of the nitrogen switch (2) away from the nitrogen inlet side is connected to one end of the first ball valve (14), the other end of the first ball valve (14) is connected to one end of the first filter (15), the other end of the first filter (15) is connected to one end of the pressure regulating valve (16) through a fifth sensor (18), the other end of the pressure regulating valve (16) is connected to the input end of the flow meter (17) through a sixth sensor (19), and the output end of the flow meter (17) is connected to the gas input end of the nitrogen regulating valve (3).

3. The nitrogen air knife regulating system according to claim 1, characterized in that: A first pressure gauge (20) is provided between the first sensor (5) and the nitrogen regulating valve (3), and a second pressure gauge (21) is provided between the second sensor (6) and the first output end of the gas storage tank (4).

4. The nitrogen air knife regulating system according to claim 1, characterized in that: An end of the regulating main circuit (11) away from the gas storage tank (4) is connected to an air knife blower; The regulating main circuit (11) is provided with an air knife switch (23) for controlling the air knife blower.

5. The nitrogen air knife regulating system according to claim 1, characterized in that: The air pipeline (7) is also provided with a second ball valve (24) and a second filter (25); One end of the air pipeline (7) away from the air inlet is connected to one end of the second filter (25), and the other end of the second filter (25) is connected to the gas input end of the air regulating valve (8) through the third sensor (10).

6. The nitrogen air knife regulating system according to claim 5, characterized in that: A third pressure gauge (26) is provided between the third sensor (10) and the second filter (25); and a fourth pressure gauge (27) is provided between the air regulating valve (8) and the air switch (9).

7. The nitrogen air knife regulating system according to claim 2, characterized in that: A fifth pressure gauge (28) is provided between the fifth sensor (18) and the first filter (15); and a sixth pressure gauge (22) is provided between the sixth sensor (19) and the pressure-stabilizing valve (16).

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