Automatic window blowing device capable of preventing dust and high-temperature melt from being accumulated

Abstract

The invention relates to an automatic blowing window device capable of preventing dust and high-temperature melt from being accumulated, the automatic blowing window device comprises a view field tube, the view field tube is provided with an air guide sleeve, and the air guide sleeve is provided with a protective sleeve; a first gap is formed between the protective sleeve and the gas guide sleeve, and a coking purging gas chamber is formed in the first gap; a second gap is formed between the air guide sleeve and the field tube, and forms a pressure taking air chamber; a pressure tapping gas inlet is formed in one side of the protective sleeve and is communicated with the coking purging gas chamber; a coking purging gas inlet is formed in one side of each of the protective sleeve and the gas guide sleeve; the coking purging gas inlets are communicated with the gas compression chamber and the coking purging gas chamber; a flange is arranged at one end of the view field pipe, a gas guide ring sleeves one end, far away from the flange, of the view field pipe, a pressure tapping nozzle is arranged on the periphery of the gas guide ring, a third gap is formed between the pressure tapping nozzle and the gas guide ring, and the third gap is communicated with the coking purging gas chamber.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of industrial furnace monitoring, and in particular to an automatic purging window device capable of preventing dust and high-temperature molten material from accumulating. BACKGROUND

[0002] In industrial production, the operation state monitoring of combustion equipment such as industrial boilers, incinerators and gasification furnaces is crucial. Optical measuring instruments such as high-temperature endoscopes, laser spectrometers and infrared thermometers are usually used to observe and measure the internal flame shape, temperature field distribution and component concentration through observation holes in the furnace wall in real time.

[0003] However, a large amount of dust, unburned carbon particles and gaseous salt substances are generated during the combustion reaction. When these substances move with the high-temperature gas flow, they are prone to condense and accumulate at the observation hole window with relatively low temperature. At the same time, part of the high-temperature molten ash splashes onto the observation window, which will quickly cool down and firmly adhere to form dust accumulation and coking. This phenomenon can seriously block the optical view and attenuate the light signal intensity, resulting in distorted or even interrupted measurement data, which must be cleaned frequently. Not only does this affect the continuity of production, but manual cleaning also poses safety risks and has a high risk of damaging the observation window.

[0004] The current common solution is to use compressed air purging, but the traditional straight blowing type purging gas flow is disorganized, has low dust prevention efficiency, and is basically ineffective for sticky coking that has already formed. If a mechanical automatic scraping mechanism is used, the structure is complex and is prone to failure in a high-temperature environment. Manual cleaning is frequent and poses safety risks.

[0005] Therefore, there is an urgent need for a device that can effectively isolate pollution, prevent adhesion, and be cleaned online. SUMMARY

[0006] The present application provides an automatic purging window device capable of preventing dust and high-temperature molten material from accumulating, which can prevent coking and dust accumulation in the observation window and automatically sense coking and dust accumulation for purging.

[0007] According to a first aspect of the present application, an automatic purging window device capable of preventing dust and high-temperature molten material from accumulating is provided, which includes a field-of-view tube, a gas guide sleeve is arranged on the field-of-view tube, and a protective sleeve is arranged on the gas guide sleeve.

[0008] A first gap is arranged between the protective sleeve and the gas guide sleeve, and the first gap forms a coking purging gas chamber; a second gap is arranged between the gas guide sleeve and the field-of-view tube, and the second gap forms a pressure-taking gas chamber.

[0009] The protection sleeve is provided with a pressure-taking gas inlet on one side, and the pressure-taking gas inlet is communicated with the coking purging gas chamber; the protection sleeve and the gas guide sleeve are both provided with a coking purging gas inlet on one side, and the coking purging gas inlet is communicated with the pressure-taking chamber and the coking purging gas chamber.

[0010] One end of the field-of-view tube is provided with a flange, a gas guide ring is sleeved on the end of the field-of-view tube away from the flange, a pressure-taking nozzle is arranged on the periphery of the gas guide ring, and a third gap is arranged between the pressure-taking nozzle and the gas guide ring, and the third gap is communicated with the coking purging gas chamber.

[0011] In the embodiment, the pressure-taking nozzle is installed on the observation port to improve the purging gas pressure and flow rate of the observation port, and the pressure-taking nozzle provides uninterrupted purging gas flow at the observation window to generate a local flow field, so that the dust and coking substances are as little as possible to adhere to the observation window. If the coking substances adhere to the observation port of the window, the flow passage cross section of the pressure-taking nozzle is reduced, the back pressure of the pressure-taking gas flow is increased, the pressure switch is started, and the window device is automatically purged. Since the installation window of the optical and microwave measuring instrument of the furnace is in the working conditions of high temperature, high erosion, high corrosion and the like, the pneumatic purging scheme is adopted in the embodiment instead of the mechanical cleaning scheme with relatively complex structure to ensure the reliability of the window device.

[0012] In one embodiment, the gas guide sleeve is connected to the field-of-view tube at the end close to the flange, and the protection sleeve is connected to the gas guide sleeve at the end close to the flange.

[0013] In the embodiment, the gas guide sleeve is connected to the field-of-view tube at the end close to the flange, and the protection sleeve is connected to the gas guide sleeve at the end close to the flange, so that the protection sleeve and the gas guide sleeve form a pressure-taking chamber, and the gas guide sleeve, the field-of-view tube and the gas guide ring form a coking purging gas chamber.

[0014] In one embodiment, the gas guide sleeve is welded to the field-of-view tube at the end close to the flange, and the protection sleeve is welded to the gas guide sleeve at the end close to the flange; or,

[0015] The gas guide sleeve is welded to the field-of-view tube at the end close to the flange, and the protection sleeve is integrally formed with the gas guide sleeve at the end close to the flange.

[0016] In the embodiment, the gas guide sleeve is welded to the field-of-view tube at the end close to the flange, and the protection sleeve is welded to the gas guide sleeve at the end close to the flange, which is simple and reliable; or the gas guide sleeve is welded to the field-of-view tube at the end close to the flange, and the protection sleeve is integrally formed with the gas guide sleeve at the end close to the flange to reduce the welding process.

[0017] In one embodiment, the field of view tube is internally formed with a dust blowing purge chamber, and a dust blowing purge gas inlet is arranged on the sidewall of the field of view tube and communicates with the dust blowing purge chamber.

[0018] In this embodiment, the field of view tube is internally formed with a dust blowing purge chamber, and a dust blowing purge gas inlet is arranged on the sidewall of the field of view tube and communicates with the dust blowing purge chamber, so that the gas is input into the dust blowing purge chamber through the dust blowing purge gas inlet.

[0019] In one embodiment, a plurality of pressure taking nozzle arrays are arranged on the pressure taking nozzle, and the pressure taking gas flows out through the pressure taking nozzle arrays.

[0020] In this embodiment, a plurality of pressure taking nozzle arrays are arranged on the pressure taking nozzle, so that the pressure taking gas can flow out through the pressure taking nozzle arrays.

[0021] In one embodiment, the automatic blowing window device further comprises a one-way valve, a speed regulating valve, a first electromagnetic valve, a second electromagnetic valve, a pressure switch, a time relay and a power supply.

[0022] The input end of the speed regulating valve is connected with the blowing gas storage tank through a pipeline, the output end of the speed regulating valve is connected with the input end of the one-way valve through a pipeline, and the output end of the one-way valve is connected with the pressure taking gas inlet through a pipeline.

[0023] The input end of the first electromagnetic valve is connected with the blowing gas storage tank through a pipeline, and the input end of the first electromagnetic valve is connected with the dust blowing purge gas inlet through a pipeline.

[0024] The input end of the second electromagnetic valve is connected with the blowing gas storage tank through a pipeline, and the input end of the second electromagnetic valve is connected with the coking blowing purge gas inlet through a pipeline.

[0025] The pressure switch is connected to the pipeline between the one-way valve and the speed regulating valve, the time relay is connected to the pressure switch, and the power supply supplies power to the pressure pipeline and the time relay.

[0026] In this embodiment, the speed regulating valve is used to adjust the flow of the pressure taking gas, so as to ensure that the gas flows at a fixed speed after the valve. The one-way valve ensures the one-way flow of the pressure taking gas, so that the high-temperature gas in the furnace will not flow back due to the over-high pressure of the furnace, causing danger. The pressure switch is used to monitor the pressure of the pressure taking gas. The electromagnetic valve is used to execute the pressure switch signal and the logic control signal, so as to control the opening and closing of the dust blowing purge and coking blowing purge gas sources.

[0027] In one embodiment, the structure of the pressure taking nozzle is a circular ring, and the structure of the gas guide ring is a conical circular ring or a circular ring.

[0028] In one embodiment, the gas guide sleeve, the protective sleeve, the pressure tapping nozzle and the gas guide ring are made of high-temperature-resistant and wear-resistant alloy material.

[0029] In one embodiment, one end of the field-of-view tube is connected with the optical measuring device through the flange, and the protective sleeve is provided with a mounting support, and the field-of-view tube is connected with the protective wall through the mounting support.

[0030] The technical scheme of the present application has the following technical effects:

[0031] 1. The automatic purging window device capable of preventing dust and high-temperature melt from accumulating provided by the present application improves the purging gas pressure and flow rate of the observation window by installing a pressure tapping nozzle and a purging nozzle at the optical observation port, realizes the cleaning of the coking of the observation port, and realizes the automatic purging function and the saving control of the purging gas by monitoring the pressure tapping pressure through a pressure switch when coking occurs at the pressure tapping nozzle (observation port), which causes the flow passage cross section of the pressure tapping nozzle to become smaller and the pressure of the pressure tapping gas to become higher.

[0032] 2. The automatic purging window device capable of preventing dust and high-temperature melt from accumulating provided by the present application has a simple structure, integrates a protective sleeve, a gas guide sleeve, a pressure tapping nozzle and a gas guide ring on the original field-of-view tube, and enables the components to be integrally formed by welding, which has no moving parts in the high-temperature area, is simple and reliable in structure compared with the mechanical principle cleaning device, is easy to install, has a long service life, has a low cost, can use air as the pressure tapping gas when the optical measuring instrument is used in a negative pressure furnace, and can further simplify the structure. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of a traditional optical and microwave observation window.

[0034] Figure 2 It is a schematic diagram of a traditional optical and microwave observation window and an optical and microwave instrument installation system.

[0035] Figure 3 It is a structural schematic diagram of an automatic purging window device capable of preventing dust and high-temperature melt from accumulating in the present embodiment.

[0036] Figure 4 It is a structural schematic diagram of an automatic purging window device capable of preventing dust and high-temperature melt from accumulating in the present embodiment.

[0037] Figure 5 It is a top view of the pressure tapping nozzle in the present embodiment.

[0038] Figure 6A side view of the pressure tapping nozzle in the embodiment of the present application.

[0039] Figure 7 A flow chart of the automatic purging window device capable of preventing dust and high-temperature melt accumulation in the embodiment of the present application.

[0040] In the figure, 1 is a view field tube, 2 is a gas guide sleeve, 3 is a protective sleeve, 4 is a coking purging gas chamber, 5 is a pressure tapping gas chamber, 6 is a pressure tapping gas inlet, 7 is a coking purging gas inlet, 8 is a flange, 9 is a gas guide ring, 10 is a pressure tapping nozzle, 11 is a dust accumulation purging gas chamber, 12 is a dust accumulation purging gas inlet, 13 is a one-way valve, 14 is a speed regulating valve, 15 is a first electromagnetic valve, 16 is a second electromagnetic valve, 17 is a pressure switch, 18 is a time relay, 19 is a power supply, and 101 is a pressure tapping nozzle array. DETAILED DESCRIPTION

[0041] The present application will be described in detail below with reference to the embodiments and the accompanying drawings, and it should be noted that the described embodiments are only intended to facilitate the understanding of the present application and do not limit the present application in any way.

[0042] Figure 1 A structural diagram of a conventional optical and microwave observation window. As shown in the figure, the conventional optical and microwave observation window is usually a view field tube with a reverse flange. The view field tube is a hollow tube, and one end of the view field tube is connected to an optical and microwave device through the reverse flange, and the other end of the view field tube extends into a furnace wall and is connected to a furnace. Figure 1

[0043] Figure 2 A structural diagram of a conventional optical and microwave observation window and an optical and microwave instrument installation system. Since the view field tube usually has a large diameter, the volume of the purging gas instantaneously expands and the pressure instantaneously drops after the purging gas enters the view field tube. The length of the view field tube is relatively long, and the purging gas inlet is located on the outside of the furnace wall and is far away from the optical observation port. Therefore, the pressure of the purging gas decreases a lot when the purging gas reaches the observation port. After the purging gas expands and expands in the view field tube, the flow rate of the purging gas also decreases relatively. Therefore, the purging gas usually has a purging effect on the dust in the form of powder, but it is difficult to effectively purging the coking produced by combustion, which often causes the observation port to be blocked by coking. In addition, the flow direction of the combustion dynamic field in the industrial furnace is usually stable, and the flow direction is usually perpendicular to the optical observation direction. Therefore, the coking is usually hung on the observation port of the view field tube, and the inside of the tube is usually filled with powder dust. Therefore, the optical window usually needs to solve the problem of coking at the observation port.

[0044] ​For the traditional purging system, due to the volume of the field tube being too large, the pressure and flow of the purging gas at the observation port are insufficient, and the coking at the observation port cannot be cleaned. The present application installs a pressure tapping nozzle at the observation port to increase the pressure and flow rate of the purging gas at the observation port, and provides an uninterrupted purging gas flow at the observation window through the pressure tapping nozzle to generate a local flow field, so that the accumulated dust and coking substances do not adhere to the observation window as much as possible. If coking adheres to the observation port at the window, the flow passage cross section of the pressure tapping nozzle becomes smaller, causing the back pressure of the pressure tapping gas flow to rise, the pressure switch is started, and the window device is automatically purged. The installation window of the optical and microwave measuring instrument of the furnace is often in a high temperature, high erosion, and high corrosion working condition.

[0045] Figure 3 and Figure 4 are structural diagrams of an automatic purging window device capable of preventing dust and high temperature molten material from accumulating in the present embodiment. As shown in Figure 3 and Figure 4 , the automatic purging window device capable of preventing dust and high temperature molten material from accumulating includes a field tube 1, a gas guide sleeve 2 is arranged on the field tube 1, a protective sleeve 3 is arranged on the gas guide sleeve 2; a first gap is arranged between the protective sleeve 3 and the gas guide sleeve 2, and the first gap forms a coking purging gas chamber 4; a second gap is arranged between the gas guide sleeve 2 and the field tube 1, and the second gap forms a pressure tapping gas chamber 5; a pressure tapping gas inlet 6 is arranged on one side of the protective sleeve 3, and the pressure tapping gas inlet 6 is communicated with the coking purging gas chamber 4; a coking purging gas inlet 7 is arranged on one side of the protective sleeve 3 and the gas guide sleeve 2, and the coking purging gas inlet 7 is communicated with the pressure tapping gas chamber and the coking purging gas chamber 4; one end of the field tube 1 is provided with a flange 8, a gas guide ring 9 is sleeved on the end of the field tube 1 away from the flange 8, a pressure tapping nozzle 10 is arranged on the periphery of the gas guide ring 9, a third gap is arranged between the pressure tapping nozzle 10 and the gas guide ring 9, and the third gap is communicated with the coking purging gas chamber 4; wherein the ratio of the aperture of the pressure tapping gas inlet to the thickness of the pressure tapping nozzle is 0.1-100.

[0046] In the present embodiment, the pressure tapping nozzle 10 is installed at the observation port to increase the pressure and flow rate of the purging gas at the observation port, and an uninterrupted purging gas flow is provided at the observation window through the pressure tapping nozzle 10 to generate a local flow field, so that the accumulated dust and coking substances do not adhere to the observation window as much as possible, and if coking adheres to the observation port at the window, the flow passage cross section of the pressure tapping nozzle 10 becomes smaller, causing the back pressure of the pressure tapping gas flow to rise, the pressure switch is started, and the window device is automatically purged. Since the installation window of the optical and microwave measuring instrument of the furnace is often in a high temperature, high erosion, and high corrosion working condition, the present embodiment adopts a pneumatic purging scheme instead of a mechanical cleaning scheme with relatively complex structure to ensure the reliability of the window device.

[0047] In one implementation, the gas guide sleeve 2 is connected to the field tube 1 at one end close to the flange 8, and the protective sleeve 3 is connected to the gas guide sleeve 2 at one end close to the flange 8.

[0048] In this embodiment, the gas guide sleeve 2 is connected to the field tube 1 at one end close to the flange 8, and the protective sleeve 3 is connected to the gas guide sleeve 2 at one end close to the flange 8, so that the protective sleeve and the gas guide sleeve form the pressure taking gas chamber 5, and the gas guide sleeve, the field tube 1 and the gas guide ring 9 form the coking purging gas chamber 4.

[0049] In one specific implementation, the gas guide sleeve 2 is welded to the field tube 1 at one end close to the flange 8, and the protective sleeve 3 is welded to the gas guide sleeve 2 at one end close to the flange 8. This implementation is simple and reliable by welding the gas guide sleeve 2 to the field tube 1 at one end close to the flange 8, and welding the protective sleeve 3 to the gas guide sleeve 2 at one end close to the flange 8.

[0050] In another specific implementation, the gas guide sleeve 2 is welded to the field tube 1 at one end close to the flange 8, and the protective sleeve 3 is integrally formed with the gas guide sleeve 2 at one end close to the flange 8. This implementation welds the gas guide sleeve 2 to the field tube 1 at one end close to the flange 8, and integrally forms the protective sleeve 3 with the gas guide sleeve 2 at one end close to the flange 8, to reduce the welding process.

[0051] As shown in Figure 3 and Figure 4 , the field tube 1 is internally formed with a dust blowing purging gas chamber 11, and the field tube 1 is provided with a dust blowing purging gas inlet 12 on the side wall, which communicates with the dust blowing purging gas chamber 11.

[0052] In this embodiment, the dust blowing purging gas chamber 11 is formed inside the field tube 1, and the dust blowing purging gas inlet 12 is provided on the side wall of the field tube 1 and communicates with the dust blowing purging gas chamber 11, so that the gas is input into the dust blowing purging gas chamber 11 through the dust blowing purging gas inlet 12.

[0053] Figure 5 It is a top view of the pressure taking nozzle in the embodiment of the present application.

[0054] Figure 6 It is a side view of the pressure taking nozzle in the embodiment of the present application.

[0055] As shown in Figure 5 and Figure 6 , the pressure taking nozzle 10 is provided with a plurality of pressure taking jet hole arrays 101, through which the pressure taking gas flows out.

[0056] In this embodiment, a plurality of pressure tapping nozzle arrays 101 are provided on the pressure tapping nozzle 10 so that the pressure tapping gas can flow out through the pressure tapping nozzle array 101.

[0057] Figure 7 This is a schematic diagram of the process of an automatic window blowing device according to an embodiment of the present invention, capable of preventing the accumulation of dust and high-temperature molten materials. Figure 7 As shown, the automatic purging window device further includes a one-way valve 13, a speed control valve 14, a first solenoid valve 15, a second solenoid valve 16, a pressure switch 17, a time relay 18, and a power supply 19; wherein, the input end of the speed control valve 14 is connected to the purging gas storage tank via a pipeline, the output end of the speed control valve 14 is connected to the input end of the one-way valve 13 via a pipeline, and the output end of the one-way valve 13 is connected to the pressure tapping gas inlet 6 via a pipeline; the input end of the first solenoid valve 15 is connected to the purging gas storage tank via a pipeline. The input and output ends of the first solenoid valve 15 are connected to the ash purging gas inlet 12 via pipelines; the input end of the second solenoid valve 16 is connected to the purging gas storage tank via pipelines, and the input and output ends of the second solenoid valve 16 are connected to the coking purging gas inlet 7 via pipelines; the pressure switch 17 is connected to the pipeline between the one-way valve 13 and the speed regulating valve 14, the time relay 18 is connected to the pressure switch 17, and the power supply 19 supplies power to the pressure pipeline and the time relay 18.

[0058] In this embodiment, the speed regulating valve 14 is used to regulate the flow rate of the pressurized gas, ensuring that the gas downstream of the valve flows at a fixed speed. The one-way valve 13 ensures that the pressurized gas flows in one direction, preventing backflow of high-temperature gas in the furnace due to excessive furnace pressure, which could cause danger. The pressure switch 17 is used to monitor the pressure of the pressurized gas. The solenoid valve is used to execute the signals from the pressure switch 17 and the logic control signals to control the opening and closing of the ash purging and coking purging gas sources.

[0059] In one implementation, such as Figure 3 As shown, the pressure tapping nozzle 10 has a circular structure, and the air guide ring 9 has a conical circular structure.

[0060] In another implementation, such as Figure 4 As shown, the pressure tapping nozzle 10 has a circular structure, and the air guide ring 9 has a circular structure.

[0061] Preferably, the air guide sleeve 2, the protective sleeve 3, the pressure tapping nozzle 10 and the air guide ring 9 are all made of high-temperature resistant and wear-resistant alloy material, such as P92 material.

[0062] like Figure 7As shown, one end of the field tube 1 is connected with the optical measuring device through the flange 8, and the protective sleeve 3 is provided with a mounting support, and the field tube 1 is connected with the protective wall through the mounting support.

[0063] The technical scheme of the present application has the following technical effects:

[0064] 1. The automatic purging window device capable of preventing dust and high-temperature melt accumulation provided by the present application, by installing the pressure taking nozzle 10 and the purging nozzle at the optical observation port, the observation window purging gas pressure and flow rate are improved, the cleaning of the coking at the observation port is realized, and meanwhile, the pressure taking is realized through purging gas, when there is coking at the pressure taking nozzle 10 (observation port), the flow passage cross section of the pressure taking nozzle 10 is reduced, and the back pressure of the pressure taking gas is increased, the pressure taking pressure is monitored through the pressure switch 17, the automatic purging function is realized, and meanwhile, the saving control of the purging gas is realized.

[0065] 2. The automatic purging window device capable of preventing dust and high-temperature melt accumulation provided by the present application, which is simple in structure, integrates the protective sleeve 3, the gas guide sleeve 2, the pressure taking nozzle 10 and the gas guide ring 9 on the original field tube 1, and makes each component can be integrally formed by welding, and there is no moving component in the high-temperature area, compared with the mechanical principle cleaning device, the structure is simple and reliable, the installation is convenient, the service life is long, the cost is low, when the optical measuring instrument is used in a negative pressure furnace, air can be directly used as the pressure taking gas, and the structure can be further simplified.

[0066] The working principle of the automatic purging window device capable of preventing dust and high-temperature melt accumulation provided by the present application is as follows:

[0067] The pressure taking gas flows in through the speed regulating valve 14 and the one-way valve 13, and at the same time, the pressure switch 17 is connected through a bypass after the speed regulating valve 14 and before the one-way valve 13. After the pressure taking gas passes through the speed regulating valve 14 and the one-way valve 13, it enters the pressure taking air chamber 5 and then flows out through the pressure taking nozzle 10, the pressure taking nozzle 10 is a circular small hole, the flow rate of the pressure taking gas is increased after passing through the nozzle, the kinetic energy is increased, and a micro flow field is formed at the observation port, so that the coking is as far away from the observation port as possible. If there is coking at the observation port, the coking will adhere to the purging nozzle, reduce or block the flow passage cross section of the purging nozzle, the gas pressure after the speed regulating valve 14 is increased, the pressure switch 17 is opened, the purging gas solenoid valve is controlled, the instrument compressed gas with high pressure is opened into the purging gas chamber, and then flows out at high speed through the gas guide ring 9 to perform purging. When the coking is removed, the pressure of the pressure taking air chamber 5 is decreased, the pressure switch 17 is closed, the purging gas solenoid valve is closed, and the coking purging is completed. The accumulated dust purging gas is controlled to be opened and closed by the time relay 18, so that the accumulated dust is purged in a timing mode.

[0068] It should be pointed out finally that the above embodiments are only used to explain the technical solutions of the present application, and are not intended to limit the protection scope of the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the essence and scope of the technical solutions of the present application.

[0069] The above description is only the preferred embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacements or changes to the technical solutions and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered by the protection scope of the present application.

Claims

1. An automatic window blowing device capable of preventing the accumulation of dust and high-temperature molten materials, characterized in that, The automatic blowing window device includes a field tube, an air guide sleeve is provided on the field tube, and a protective sleeve is provided on the air guide sleeve. A first gap is provided between the protective sleeve and the gas guide sleeve, and the first gap forms a coking purging gas chamber; a second gap is provided between the gas guide sleeve and the field tube, and the second gap forms a pressure tapping gas chamber. A pressure tapping gas inlet is provided on one side of the protective sleeve, and the pressure tapping gas inlet is connected to the coking purging gas chamber; both the protective sleeve and the gas guide sleeve are provided with coking purging gas inlets on one side, and the coking purging gas inlets are connected to both the pressure tapping gas chamber and the coking purging gas chamber. A flange is provided at one end of the field tube, and a gas guide ring is fitted on the end of the field tube away from the flange. A pressure tapping nozzle is provided around the gas guide ring, and a third gap is provided between the pressure tapping nozzle and the gas guide ring. The third gap is connected to the coking purging gas chamber.

2. The automatic window blowing device according to claim 1, characterized in that: The end of the gas guide sleeve near the flange is connected to the field tube, and the end of the protective sleeve near the flange is connected to the gas guide sleeve.

3. The automatic window blowing device according to claim 2, characterized in that: The end of the gas guide sleeve near the flange is welded to the field of view tube, and the end of the protective sleeve near the flange is welded to the gas guide sleeve; or, The end of the gas guide sleeve near the flange is welded to the field tube, and the end of the protective sleeve near the flange is integrally formed with the gas guide sleeve.

4. The automatic window blowing device according to any one of claims 1 to 3, characterized in that: The field tube forms a dust-collecting purge gas chamber inside, and a dust-collecting purge gas inlet is provided on the side wall of the field tube, which is connected to the dust-collecting purge gas chamber.

5. The automatic window blowing device according to any one of claims 1 to 3, characterized in that: The pressure tapping nozzle is provided with a plurality of pressure tapping nozzle arrays, through which the pressure tapping gas flows out.

6. The automatic window blowing device according to claim 4, characterized in that: The automatic window blowing device further includes: a one-way valve, a speed control valve, a first solenoid valve, a second solenoid valve, a pressure switch, a time relay, and a power supply; wherein, The input end of the speed regulating valve is connected to the purge gas storage tank via a pipeline, the output end of the speed regulating valve is connected to the input end of the check valve via a pipeline, and the output end of the check valve is connected to the pressure tapping gas inlet via a pipeline. The input end of the first solenoid valve is connected to the purge gas storage tank via a pipeline, and the input and output ends of the first solenoid valve are connected to the ash purge gas inlet via pipelines. The input end of the second solenoid valve is connected to the purge gas storage tank via a pipeline, and the input and output ends of the second solenoid valve are connected to the coking purge gas inlet via pipelines. The pressure switch is connected to the pipeline between the check valve and the speed control valve, the time relay is connected to the pressure switch, and the power supply provides power to the pressure pipeline and the time relay.

7. The automatic window blowing device according to any one of claims 1 to 3, characterized in that: The pressure tapping nozzle has a circular structure, and the air guide ring has a conical or circular structure.

8. The automatic window blowing device according to any one of claims 1 to 3, characterized in that: The air guide sleeve, the protective sleeve, the pressure tapping nozzle, and the air guide ring are all made of high-temperature resistant and wear-resistant alloy material.

9. The automatic window blowing device according to any one of claims 1 to 3, characterized in that: One end of the field tube is connected to the optical measuring device through the flange, and a mounting bracket is provided on the protective sleeve. The field tube is connected to the protective wall through the mounting bracket.

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