Tank pressure regulation and control equipment for float glass production line and float glass production line

Abstract

The utility model discloses a bath pressure regulation and control equipment for float glass production line and float glass production line, the bath pressure regulation and control equipment comprises a gas supply component and a pressure difference monitoring device, the gas supply component comprises a gas supply pipeline and a flow regulating valve, the gas supply pipeline is communicated with a tin bath of glass production line and is used for introducing protective gas into the tin bath, and the flow regulating valve is communicated with the pressure difference monitoring device. The flow regulating valve is arranged on the air supply pipeline; the pressure difference monitoring device comprises a pressure difference detection assembly and a heat preservation box, the pressure difference detection assembly comprises a detection pipeline and a first pressure difference sensor, one end of the detection pipeline communicates with the tin bath, the other end of the detection pipeline communicates with the heat preservation box, and the first pressure difference sensor is arranged on the detection pipeline and used for detecting the pressure difference between the tin bath and the heat preservation box. The opening degree of the flow adjusting valve is adjusted according to the detection result of the first pressure difference sensor, so that the bath pressure of the tin bath is larger than the air pressure of the heat preservation box, the introduction amount of the protective gas is controlled by monitoring the pressure difference, the bath pressure adjustment and control are accurate and reliable, and the production quality of float glass is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of float glass production, and in particular relates to a groove pressure regulating device for a float glass production line and a float glass production line. Background Art

[0002] Float glass is a type of glass with good flatness and uniform thickness that is formed in a tin bath. During the process of making float glass, protective gas needs to be introduced into the tin bath to keep the atmosphere in the tin bath stable to prevent the molten tin from volatilizing or oxidizing and causing contamination defects on the glass surface. However, during the production of float glass, the amount of protective gas introduced is difficult to control. Insufficient supply of protective gas can’t exhaust the oxygen in the tin bath, or the escape of protective gas during the production process will cause oxygen to enter the tin bath from the outside to oxidize the tin liquid, thereby affecting the production quality of float glass. Utility Model Content

[0003] In view of the above defects or shortcomings, the utility model provides a tank pressure regulating device for a float glass production line and a float glass production line, aiming to solve the technical problem that the amount of protective gas introduced is difficult to control during the production process of float glass.

[0004] In order to achieve the above object, the utility model provides a groove pressure regulating device for a float glass production line, and the groove pressure regulating device for a float glass production line comprises:

[0005] A gas supply assembly, including a gas supply pipeline and a flow regulating valve, the gas supply pipeline is connected to the tin bath of the glass production line and is used to introduce protective gas into the tin bath, and the flow regulating valve is arranged on the gas supply pipeline;

[0006] The pressure difference monitoring device includes a pressure difference detection component and an insulation box. The pressure difference detection component includes a detection pipeline and a first pressure difference sensor. One end of the detection pipeline is connected to the tin bath, and the other end of the detection pipeline is connected to the insulation box. The first pressure difference sensor is arranged on the detection pipeline and is used to detect the pressure difference between the tin bath and the insulation box.

[0007] In an embodiment of the utility model, a plurality of differential pressure monitoring areas are provided in the tin bath, the number of differential pressure detection components and gas supply components is consistent with the number of differential pressure monitoring areas and is arranged one-to-one, and the detection pipelines of the plurality of differential pressure detection components are connected to the insulation box at one end away from the tin bath.

[0008] In an embodiment of the utility model, the detection pipeline includes a first pipe section and a second pipe section, the two ends of the first pipe section are respectively connected to the tin bath and the first differential pressure sensor in a one-to-one correspondence, and the two ends of the second pipe section are respectively connected to the first differential pressure sensor and the insulation box in a one-to-one correspondence.

[0009] In the embodiment of the utility model, the volume of the heat preservation box is set to V, and the volume of the second pipe section is less than 0.01V.

[0010] In an embodiment of the utility model, the pressure difference monitoring device also includes a connecting pipe and a second pressure difference sensor, one end of the connecting pipe is connected to the tin bath, and the other end of the connecting pipe is connected to the annealing furnace of the glass production line. The second pressure difference sensor is arranged on the connecting pipe and is used to detect the pressure difference between the tin bath and the annealing furnace.

[0011] In an embodiment of the utility model, the pressure difference monitoring device also includes a controller, which is communicatively connected to the flow control valve, the first pressure difference sensor and the second pressure difference sensor respectively, and the controller is used to control the opening of the flow control valve according to the detection results of the first pressure difference sensor and the second pressure difference sensor.

[0012] In an embodiment of the utility model, the pressure difference monitoring device also includes a first alarm and a second alarm respectively connected to the controller for communication. The controller is also used to control the first alarm to send a first alarm signal according to the detection result of the first pressure difference sensor, and to control the second alarm to send a second alarm signal according to the detection result of the second pressure difference sensor.

[0013] In an embodiment of the utility model, the gas supply assembly further includes a flow meter, which is disposed on the gas supply pipeline and is used to detect the flow of the protective gas in the gas supply pipeline.

[0014] In an embodiment of the utility model, the pressure difference monitoring device also includes a constant temperature chamber, the insulated box is arranged in the constant temperature chamber, and the temperature fluctuation range in the constant temperature chamber is set to (t-2)℃~(t+2)℃, wherein t is set to a preset constant temperature value.

[0015] In order to achieve the above object, the utility model also provides a float glass production line, and the float glass production line includes the groove pressure regulating device for the float glass production line as described above.

[0016] Through the above technical solution, the tank pressure regulating device for a float glass production line and the float glass production line provided by the embodiment of the utility model have the following beneficial effects:

[0017] In the technical solution of the utility model, a gas supply pipeline is connected with the tin bath and is used to supply protective gas into the tin bath. A flow regulating valve is arranged on the gas supply pipeline, and the amount of protective gas introduced can be adjusted by adjusting the opening of the flow regulating valve. The insulation box is connected with the tin bath through a detection pipeline, and the volume of the insulation box is constant and the temperature in the insulation box is constant, so that the pressure in the insulation box is constant. A first differential pressure sensor is arranged on the detection pipeline to detect the pressure difference between the tin bath and the insulation box. The opening of the flow regulating valve is adjusted according to the detection result of the first differential pressure sensor, so that the protective gas flows into the tin bath through the gas supply pipeline to increase the bath pressure, thereby making the bath pressure of the tin bath greater than the gas pressure of the insulation box, ensuring that the protective gas introduced into the tin bath is sufficient and oxygen can be emptied, and the protective gas can be replenished in time according to the detection result of the first differential pressure sensor, effectively preventing the protective gas from escaping insufficiently, and realizing the control of the amount of protective gas introduced by monitoring the pressure difference. The bath pressure regulation is accurate and reliable, ensuring that the amount of protective gas introduced meets the production demand, and greatly improving the production quality of float glass.

[0018] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the embodiments of the present utility model and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present utility model, but do not constitute a limitation on the embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work. In the drawings:

[0020] Figure 1 It is a structural schematic diagram of a tank pressure regulating device for a float glass production line according to an embodiment of the utility model;

[0021] Figure 2 It is a structural schematic diagram of a tank pressure regulating device for a float glass production line according to another embodiment of the utility model;

[0022] Figure 3 The utility model is a structural block diagram of a groove pressure regulating device for a float glass production line according to an embodiment of the utility model.

[0023] Description of Reference Numerals

[0024] 10 Air supply assembly 60 Controller

[0025] 11 Gas supply line 61 First alarm

[0026] 12 Flow control valve 62 Second alarm

[0027] 13 Flow meter 70 Constant temperature room

[0028] 20 Pressure difference detection component 80 Control terminal

[0029] 21 Detection pipeline 200 tin bath

[0030] 211 First pipe section 201 Lock box

[0031] 212 Second pipe section 202 Edge drawing machine

[0032] 22 First differential pressure sensor 300 Annealing furnace

[0033] 30 Insulation box 301 Conveyor roller

[0034] 31 Temperature sensor 400 Glass liquid

[0035] 40 connecting pipe 500 glass belt

[0036] 50 Second differential pressure sensor DETAILED DESCRIPTION

[0037] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0038] The tank pressure regulating device for a float glass production line of the present invention will be described below with reference to the accompanying drawings.

[0039] like Figures 1 to 3 As shown, the utility model provides a tank pressure regulating device for a float glass production line, the tank pressure regulating device for a float glass production line comprises a gas supply component 10 and a pressure difference monitoring device, the gas supply component 10 comprises a gas supply pipeline 11 and a flow regulating valve 12, the gas supply pipeline 11 is connected with a tin bath 200 of a glass production line and is used to introduce protective gas into the tin bath 200, the flow regulating valve 12 is arranged on the gas supply pipeline 11; the pressure difference monitoring device comprises a pressure difference detection component 20 and a heat preservation box 30, the pressure difference detection component 20 comprises a detection pipeline 21 and a first pressure difference sensor 22, one end of the detection pipeline 21 is connected with the tin bath 200, and the other end of the detection pipeline 21 is connected with the heat preservation box 30, the first pressure difference sensor 22 is arranged on the detection pipeline 21 and is used to detect the pressure difference between the tin bath 200 and the heat preservation box 30.

[0040] It should be noted that the float glass production line is used to process and manufacture float glass. The float glass production line includes a kiln and a tin bath 200. The kiln is used to produce molten glass 400, and the kiln is connected to the inlet of the tin bath 200. The tin bath 200 is filled with molten tin and is provided with a side-pulling machine 202. The molten glass 400 flows into the tin bath 200 from the inlet of the tin bath 200 and floats on the surface of the molten tin. The side-pulling machine 202 spreads the molten glass 400 in the tin bath 200 so that the molten glass 400 forms a surface in the tin bath 200. A flat glass ribbon 500 with uniform thickness; the float glass production line also includes an annealing furnace 300 and a gate box 201 for connecting the annealing furnace 300 and the discharge port of the tin bath 200. A conveying mechanism is arranged in the annealing furnace 300, and the conveying mechanism includes a plurality of conveying rollers 301 arranged at intervals and used to convey the glass ribbon 500. The glass ribbon 500 formed in the tin bath 200 is conveyed to the annealing furnace 300 through the gate box 201 for annealing to eliminate stress. The plurality of conveying rollers 301 cooperate to realize the conveyance of the glass ribbon 500. In addition, in the process of manufacturing float glass, it is necessary to introduce protective gas into the tin bath 200. The protective gas mainly includes nitrogen for exhausting oxygen and hydrogen for reducing tin. Insufficient supply of protective gas will cause the oxygen in the tin bath 200 to be unable to be exhausted and undergo oxidation reaction with the tin liquid, or the escape of protective gas will also cause external oxygen to enter the tin bath 200 and undergo oxidation reaction with the tin liquid. The tin oxide produced by the oxidation reaction will pollute the glass liquid 400, causing defects on the surface of the manufactured glass ribbon 500. The bath pressure regulating device of the embodiment of the utility model can be used in a float glass production line to regulate the bath pressure of the tin bath 200. By regulating the bath pressure, the atmosphere in the tin bath 200 is kept stable, effectively preventing oxygen from entering the tin bath 200, and improving the quality of the float glass.

[0041] Specifically, the gas supply pipeline 11 is connected to the tin bath 200 and is used to supply protective gas to the tin bath 200. A flow regulating valve 12 is provided on the gas supply pipeline 11. The amount of protective gas introduced can be adjusted by adjusting the opening of the flow regulating valve 12. The insulation box 30 is connected to the tin bath 200 through the detection pipeline 21. The volume of the insulation box 30 is constant and the temperature inside the insulation box 30 is constant. According to the ideal gas state equation pV=nRT, when the volume and temperature of the insulation box 30 remain unchanged, the pressure inside the insulation box 30 is constant and set to a reference air pressure value. The first differential pressure sensor 22 is provided on the detection pipeline 21 to detect the difference between the air pressure in the tin bath 200 and the reference air pressure value provided by the insulation box 30. According to the first differential pressure sensor The detection result of the first pressure difference sensor 22 adjusts the opening of the flow regulating valve 12 so that the protective gas flows into the tin bath 200 through the gas supply pipeline 11 to increase the bath pressure, thereby making the bath pressure of the tin bath 200 greater than the air pressure of the insulation box 30, ensuring that the protective gas introduced into the tin bath 200 is sufficient and can exhaust the oxygen, and can replenish the protective gas in time according to the detection result of the first pressure difference sensor 22, effectively preventing the protective gas from escaping insufficiently, and realizing the control of the amount of protective gas introduced by monitoring the pressure difference, and the insulation box 30 is not affected by the external environment, temperature, and air pressure changes, so that the bath pressure regulation is accurate and reliable, and the bath pressure is stable relative to the reference air pressure value of the insulation box 30, ensuring that the amount of protective gas introduced meets the production needs, and greatly improving the production quality of float glass.

[0042] In an embodiment of the utility model, a plurality of pressure difference monitoring areas are provided in the tin bath 200, the number of the pressure difference detection components 20 and the air supply components 10 are consistent with the number of the pressure difference monitoring areas and are arranged one by one, and the detection pipelines 21 of the plurality of pressure difference detection components 20 away from the tin bath 200 are all connected to the insulation box 30 at one end.

[0043] like Figure 2 As shown, the number of the pressure difference detection components 20 and the number of the gas supply components 10 are both multiple, and each pressure difference monitoring area is correspondingly provided with a pressure difference detection component 20 and a gas supply component 10, and each pressure difference detection component 20 includes a detection pipeline 21 and a first pressure difference sensor 22 arranged on the detection pipeline 21, and the two ends of the detection pipeline 21 are respectively connected with the insulation box 30 and the corresponding pressure difference monitoring area in a one-to-one correspondence, and the opening of the corresponding flow control valve 12 is adjusted according to the detection result of the first pressure difference sensor 22, so that the air pressure in each pressure difference monitoring area is greater than the reference air pressure value provided by the insulation box 30, and then the oxygen in each pressure difference monitoring area is emptied and the escaped protective gas is replenished in time, so as to realize the air pressure regulation and protective gas introduction amount control in multiple pressure difference monitoring areas in the tin bath 200, thereby improving the stability of the tank pressure of the tin bath 200, and then improving the production quality and production efficiency of float glass.

[0044] In an embodiment of the utility model, the detection pipeline 21 includes a first pipe section 211 and a second pipe section 212. The two ends of the first pipe section 211 are connected to the tin bath 200 and the first differential pressure sensor 22 in a one-to-one correspondence, and the two ends of the second pipe section 212 are connected to the first differential pressure sensor 22 and the insulation box 30 in a one-to-one correspondence.

[0045] like Figure 1 and Figure 2 As shown, the first differential pressure sensor 22 is connected to the corresponding differential pressure monitoring area in the tin bath 200 through the first pipe section 211, and the first differential pressure sensor 22 is connected to the insulation box 30 through the second pipe section 212, so that the opening of the corresponding flow regulating valve 12 can be adjusted according to the detection result of the first differential pressure sensor 22, so that the protective gas introduced into the tin bath 200 increases the bath pressure of the tin bath 200, and then the air pressure in the first pipe section 211 is greater than the air pressure in the second pipe section 212 to form a slight positive pressure. When a slight positive pressure is formed between the tin bath 200 and the insulation box 30, the protective gas in the tin bath 200 can exhaust the oxygen in the tin bath 200 to prevent oxygen from entering the tin bath 200, thereby ensuring the stability of the bath pressure of the tin bath 200, effectively preventing the oxidation reaction between the tin liquid and oxygen, and improving the production quality.

[0046] In the embodiment of the utility model, the volume of the heat preservation box 30 is set to V, the volume of the second pipe section 212 is less than 0.01V, and the volume of the second pipe section 212 is the product of the cross-sectional area of ​​the second pipe section 212 and the length of the second pipe section 212. Specifically, the opening of the flow control valve 12 is adjusted according to the detection result of the first differential pressure sensor 22, so that the air pressure in the first pipe section 211 is greater than the air pressure in the second pipe section 212 to form a slight positive pressure. Since the second pipe section 212 is arranged between the first differential pressure sensor 22 and the heat preservation box 30 and is affected by the change of the external environment temperature, the volume of the second pipe section 212 is set to be less than or equal to 0.01V, so as to greatly reduce the influence of the change of the external environment temperature on the air pressure in the second pipe section 212, improve the detection accuracy of the first differential pressure sensor 22, and then accurately adjust the amount of protective gas according to the detection result of the first differential pressure sensor 22, ensure that the tin bath 200 forms a slight positive pressure relative to the outside world that can exhaust oxygen, and further improve the accuracy and reliability of the flow control of the protective gas.

[0047] In an embodiment of the utility model, the pressure difference monitoring device also includes a connecting pipe 40 and a second pressure difference sensor 50, one end of the connecting pipe 40 is connected to the tin bath 200, and the other end of the connecting pipe 40 is connected to the annealing furnace 300 of the glass production line, and the second pressure difference sensor 50 is arranged on the connecting pipe 40 and is used to detect the pressure difference between the tin bath 200 and the annealing furnace 300.

[0048] like Figures 1 to 3As shown, the tin bath 200 is connected to the annealing furnace 300 through the gate box 201 to transport the formed glass strip 500 from the tin bath 200 to the annealing furnace 300 for annealing. The protective gas in the tin bath 200 may escape from the tin bath 200 to the annealing furnace 300. A connecting pipe 40 is provided between the tin bath 200 and the annealing furnace 300, and a second differential pressure sensor 50 is provided on the connecting pipe 40, so that the second differential pressure sensor 50 detects the difference between the air pressure in the tin bath 200 and the air pressure in the annealing furnace 300, and adjusts the opening of the flow regulating valve 12 according to the detection result of the second differential pressure sensor 50 to adjust the amount of protective gas introduced, so as to realize timely replenishment of the escaped protective gas and prevent the protective gas from escaping into the annealing furnace 300, causing oxygen to enter the tin bath 200 to produce an oxidation reaction. The tank pressure regulating device of the embodiment of the utility model realizes the pressure difference monitoring between the tin tank 200 and the annealing furnace 300 by setting the connecting pipeline 40 and the second pressure difference sensor 50, and adjusts the amount of protective gas introduced according to the detection result of the second pressure difference sensor 50 so that the volume of protective gas in the tin tank 200 is fixed, thereby effectively preventing oxygen from entering the tin tank 200 and affecting the production quality of float glass.

[0049] In an embodiment of the utility model, the pressure difference monitoring device also includes a controller 60, which is respectively communicated with the flow control valve 12, the first pressure difference sensor 22 and the second pressure difference sensor 50, and the controller 60 is used to control the opening of the flow control valve 12 according to the detection results of the first pressure difference sensor 22 and the second pressure difference sensor 50.

[0050] like Figures 1 to 3 As shown, the first differential pressure sensor 22 is used to detect the pressure difference between the tin bath 200 and the insulation box 30, and the second differential pressure sensor 50 is used to detect the pressure difference between the tin bath 200 and the annealing furnace 300, and the first differential pressure sensor 22 and the second differential pressure sensor 50 can both transmit the detection results to the controller 60, so that the controller 60 receives the detection results and controls the opening of the flow regulating valve 12 according to the preset differential pressure value and the detection results of the first differential pressure sensor 22 and the second differential pressure sensor 50, thereby achieving control of the amount of protective gas introduced, ensuring that a slight positive pressure that can exhaust oxygen is formed between the pressure of the protective gas introduced into the tin bath 200 and the reference pressure value, and realizing precise control of the amount of protective gas introduced by monitoring and regulating the differential pressure of the tin bath 200, thereby improving the production quality of float glass.

[0051] Furthermore, if Figures 1 to 3As shown, the pressure difference monitoring device also includes an operation terminal that is communicatively connected to the controller 60, and the control terminal 80 includes a display. The controller 60 transmits the received detection results of the first pressure difference sensor 22 and the second pressure difference sensor 50 to the control terminal 80, so that the detection results are displayed on the display of the control terminal 80, so that the operator can manually adjust the opening of the flow control valve 12 through the control terminal 80 and the controller 60 according to the detection results displayed on the display, thereby realizing the control of the tank pressure and the amount of protective gas introduced. In addition, the first pressure difference sensor 22 and the second pressure difference sensor 50 transmit the detection results to the controller 60, the controller 60 receives the detection results and transmits the detection results to the operation terminal, and the controller 60 controls the opening of the flow control valve 12. The existing technology can be used, and the controller 60 is respectively connected to the flow control valve 12, the first pressure difference sensor 22, the second pressure difference sensor 50 and the control terminal 80 for communication, which is well known to those skilled in the art and does not belong to the core improvement part of the present application, so it is not repeated here.

[0052] In an embodiment of the utility model, the pressure difference monitoring device also includes a first alarm 61 and a second alarm 62 respectively connected to the controller 60 for communication. The controller 60 is also used to control the first alarm 61 to send a first alarm signal according to the detection result of the first pressure difference sensor 22, and to control the second alarm 62 to send a second alarm signal according to the detection result of the second pressure difference sensor 50.

[0053] like Figure 3As shown, the first differential pressure sensor 22 is arranged on the detection pipeline 21 to detect the pressure difference between the tin bath 200 and the insulation box 30. The first differential pressure sensor 22 transmits the detection result to the controller 60. The controller 60 receives the detection result of the first differential pressure sensor 22 and controls the first alarm 61 to send a first alarm signal when the pressure difference between the tin bath 200 and the insulation box 30 is outside the first preset pressure difference range, wherein the first preset pressure difference range is set to 5Pa~15Pa, that is, the controller 60 can adjust the opening of the flow control valve 12 to increase or decrease the amount of protective gas when the pressure difference between the tin bath 200 and the insulation box 30 is less than 5Pa or greater than 15Pa, so as to form a slight positive pressure between the tin bath 200 and the insulation box 30, and can send a first alarm signal through the first alarm 61 to prompt the operator to check or adjust the opening of the flow control valve 12; the second differential pressure sensor 50 is arranged on the connecting pipeline 4 0 to detect the pressure difference between the tin bath 200 and the annealing furnace 300, the second pressure difference sensor 50 transmits the detection result to the controller 60, the controller 60 receives the detection result of the second pressure difference sensor 50 and controls the second alarm 62 to send a second alarm signal when the pressure difference between the tin bath 200 and the annealing furnace 300 is outside the second preset pressure difference range, wherein the second preset pressure difference range is set to 5Pa~20Pa, that is, the controller 60 can adjust the opening of the flow control valve 12 to increase or decrease the amount of protective gas when the pressure difference between the tin bath 200 and the annealing furnace 300 is less than 5Pa or greater than 20Pa, so as to prevent the protective gas from escaping into the annealing furnace 300 and causing oxygen to enter the tin bath 200, and can send a second alarm signal through the second alarm 62 to prompt the operator to check or adjust the opening of the flow control valve 12, thereby further improving the accuracy of tank pressure regulation and protective gas intake control.

[0054] Furthermore, the first alarm 61 and the second alarm 62 may be configured as sound and light alarms in the prior art, and the first alarm signal and the second alarm signal may be sound signals, light signals or sound and light signals, or the first alarm 61 and the second alarm 62 may be configured as displays in the prior art, and the first alarm signal and the second alarm signal may be alarm pop-up windows displayed on the display. The communication connection between the controller 60 and the first alarm 61 and the second alarm 62 is well known to those skilled in the art, and does not belong to the core improvement part of the present application, and therefore will not be elaborated here.

[0055] In the embodiment of the utility model, the gas supply assembly 10 further includes a flow meter 13, which is arranged on the gas supply pipeline 11 and is used to detect the flow rate of the protective gas in the gas supply pipeline 11. Figures 1 to 3As shown, the number of flowmeters 13 is consistent with the number of flow regulating valves 12 and is set one by one. By setting the flowmeter 13, the amount of protective gas introduced can be accurately detected, and then the total amount of protective gas introduced in multiple pressure difference monitoring areas can be monitored to ensure that the volume of protective gas in the tin bath 200 is fixed, and further provide the reliability of protective gas flow control. In addition, the flowmeter 13 is connected to the controller 60 for communication. In the actual production process, the weight coefficient of each pressure difference monitoring area is set according to the production requirements, so that the controller 60 can flexibly adjust the opening of the corresponding flow regulating valve 12 according to the detection results of the first pressure difference sensor 22, the second pressure difference sensor 50 and the flowmeter 13, and the preset weight coefficient of the corresponding pressure difference monitoring area, so as to achieve accurate control of the tank pressure and the amount of protective gas introduced. In addition, the controller 60 can use existing technology to adjust the opening of the flow control valve 12 according to the detection results of the first differential pressure sensor 22, the second differential pressure sensor 50 and the flow meter 13 and the preset weight coefficient. The communication connection between the controller 60 and the flow meter 13 is well known to those skilled in the art and does not belong to the core improvement part of the present application, so it will not be repeated here.

[0056] In the embodiment of the present invention, the pressure difference monitoring device further comprises a constant temperature chamber 70, the heat preservation box 30 is arranged in the constant temperature chamber 70, and the temperature fluctuation range in the constant temperature chamber 70 is set to (t-2)℃~(t+2)℃, wherein t is set to a preset constant temperature value. Figure 1 and Figure 2 As shown, a heat preservation box 30 is provided in the constant temperature chamber 70, a first differential pressure sensor 22 is provided at one end of the second pipe section 212, and the other end of the second pipe extends into the constant temperature chamber 70 and communicates with the heat preservation box 30. The temperature in the constant temperature chamber 70 is set to a preset constant temperature value t, and the temperature fluctuation range in the constant temperature chamber 70 is between the preset constant temperature value t±2°C. The heat preservation box 30 is provided in the constant temperature chamber 70 and has the function of further maintaining a constant temperature. The volume of the heat preservation box 30 is certain so that the heat preservation box 30 can provide a reference air pressure value. The difference between the tank pressure of the tin tank 200 and the reference air pressure value is detected by the first differential pressure sensor 22 to adjust the amount of protective gas introduced, so that the tank pressure remains stable relative to the reference air pressure value, thereby ensuring that the protective gas is adequately supplied during the production process to exhaust oxygen, thereby improving the production quality of float glass. The heat preservation box 30 is provided in the constant temperature chamber 70 with a temperature fluctuation range of (t-2)°C to (t+2)°C to provide a stable and reliable reference air pressure value, thereby improving the accuracy of tank pressure monitoring.

[0057] In addition, if Figure 3As shown, a temperature sensor 31 is also provided in the incubator 30 and is communicatively connected to the controller 60. The temperature sensor 31 is used to detect the real-time temperature in the incubator 30, so that the operator can obtain and view the real-time temperature of the incubator 30, thereby further improving the accuracy and reliability of the pressure difference detection. The communication connection between the temperature sensor 31 and the controller 60 can adopt the existing technology and is well known to those skilled in the art. The communication connection between the temperature sensor 31 and the controller 60 does not belong to the core improvement part of the present application, and thus will not be described in detail here.

[0058] In addition, the utility model also provides a float glass production line, which includes the groove pressure regulating device for the float glass production line described above, and the specific structure of the groove pressure regulating device refers to the above embodiment. Since the float glass production line adopts all the technical solutions of the above embodiment, it at least has all the beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here one by one.

[0059] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0060] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0062] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A tank pressure control device for a float glass production line, characterized in that: The tank pressure regulating device for the float glass production line comprises: A gas supply assembly (10) comprising a gas supply pipeline (11) and a flow regulating valve (12); the gas supply pipeline (11) is in communication with a tin bath (200) of a glass production line and is used to introduce protective gas into the tin bath (200); and the flow regulating valve (12) is arranged on the gas supply pipeline (11); A pressure difference monitoring device comprises a pressure difference detection component (20) and a heat preservation box (30), wherein the pressure difference detection component (20) comprises a detection pipeline (21) and a first pressure difference sensor (22), one end of the detection pipeline (21) is connected to the tin bath (200), and the other end of the detection pipeline (21) is connected to the heat preservation box (30), and the first pressure difference sensor (22) is arranged on the detection pipeline (21) and is used to detect the pressure difference between the tin bath (200) and the heat preservation box (30).

2. The tank pressure regulating device for a float glass production line according to claim 1, characterized in that: A plurality of differential pressure monitoring areas are provided in the tin bath (200); the number of the differential pressure detection components (20) and the gas supply components (10) is consistent with the number of the differential pressure monitoring areas and are arranged in one-to-one correspondence; and the ends of the detection pipelines (21) of the plurality of differential pressure detection components (20) away from the tin bath (200) are all connected to the thermal insulation box (30).

3. The tank pressure regulating device for a float glass production line according to claim 1, characterized in that: The detection pipeline (21) comprises a first pipe section (211) and a second pipe section (212), wherein two ends of the first pipe section (211) are respectively connected to the tin bath (200) and the first differential pressure sensor (22) in a one-to-one correspondence, and two ends of the second pipe section (212) are respectively connected to the first differential pressure sensor (22) and the heat preservation box (30) in a one-to-one correspondence.

4. The tank pressure regulating device for a float glass production line according to claim 3, characterized in that: The volume of the heat preservation box (30) is set to V, and the volume of the second pipe section (212) is less than 0.01V.

5. The tank pressure regulating device for a float glass production line according to claim 1, characterized in that: The pressure difference monitoring device further comprises a connecting pipe (40) and a second pressure difference sensor (50); one end of the connecting pipe (40) is connected to the tin bath (200), and the other end of the connecting pipe (40) is connected to the annealing furnace (300) of the glass production line; the second pressure difference sensor (50) is arranged on the connecting pipe (40) and is used to detect the pressure difference between the tin bath (200) and the annealing furnace (300).

6. The tank pressure regulating device for a float glass production line according to claim 5, characterized in that: The pressure difference monitoring device also includes a controller (60), which is communicatively connected to the flow control valve (12), the first pressure difference sensor (22) and the second pressure difference sensor (50) respectively, and the controller (60) is used to control the opening of the flow control valve (12) according to the detection results of the first pressure difference sensor (22) and the second pressure difference sensor (50).

7. The tank pressure regulating device for a float glass production line according to claim 6, characterized in that: The pressure difference monitoring device also includes a first alarm (61) and a second alarm (62) respectively connected to the controller (60) for communication. The controller (60) is also used to control the first alarm (61) to send a first alarm signal according to the detection result of the first pressure difference sensor (22), and to control the second alarm (62) to send a second alarm signal according to the detection result of the second pressure difference sensor (50).

8. The tank pressure regulating device for a float glass production line according to any one of claims 1 to 7, characterized in that: The gas supply assembly (10) further comprises a flow meter (13), wherein the flow meter (13) is arranged on the gas supply pipeline (11) and is used to detect the flow rate of the protective gas in the gas supply pipeline (11).

9. The tank pressure regulating device for a float glass production line according to any one of claims 1 to 7, characterized in that: The pressure difference monitoring device also includes a constant temperature chamber (70), the heat preservation box (30) is arranged in the constant temperature chamber (70), and the temperature fluctuation range in the constant temperature chamber (70) is set to (t-2)°C to (t+2)°C, wherein t is set to a preset constant temperature value.

10. A float glass production line, characterized in that: The float glass production line comprises the tank pressure regulating device for a float glass production line according to any one of claims 1 to 9.

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