Oxygen sensor automatic blowback system for atmosphere protection electroslag furnace

Abstract

The utility model provides an oxygen sensor automatic blowback system for an atmosphere protection electroslag furnace, and belongs to the technical field of electroslag furnaces. Comprising a supporting frame, an air inlet, a detection port and an air outlet are formed in the bottom end of the supporting frame, a filtering device, a mass flow controller and an oxygen content detection device are arranged in the supporting frame, and the air inlet and the air outlet are both connected with the mass flow controller; the detection port is connected with the filtering device, and one end, far away from the detection port, of the filtering device is connected with the oxygen content detection device. According to the oxygen sensor automatic blowback system for the atmosphere protection electroslag furnace, the protection bin is inflated by opening the first switch valve, the third switch valve is opened, gas in the bin is detected, after a preset value is reached, the first switch valve is closed, and the gas in the bin is accurately controlled by adopting the mass flow controller; and the effect of filtering the gas is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric slag furnaces, and in particular relates to an automatic back-blowing system of an oxygen sensor for an atmosphere-protected electric slag furnace. Background Art

[0002] Application No. 202123084926.8 provides a micro-positive pressure detection device for a protective atmosphere electric slag furnace. Before arcing, a large amount of argon is filled to discharge the air in the furnace. The argon filling flow rate is 200L / min, and the argon filling time is 30min. During the smelting process, a fixed flow of argon is filled, which is generally 110L / min~130L / min depending on the type of steel, to ensure the gas atmosphere in the furnace. After using the utility model, argon is still filled at a flow rate of 200L / min before arcing, and the pressure value in the furnace is monitored during the process. When the micro-positive pressure requirement of 0.4bar~0.6bar is met, the system automatically adjusts the opening angle of the dust exhaust automatic valve to a small value. The dust exhaust valve is not completely closed, and the function of discharging flue gas is still retained;

[0003] In the metallurgical industry, the gas content in the gas-protected electric slag furnace needs to be detected in real time during smelting. In the past, the oxygen content probe was directly installed inside the protective cover. In the traditional detection method, the slag in the protective cover will corrode the sensor detection element seriously, which greatly reduces the service life of the sensor. In addition, a large amount of dust will cause the sensor detection pipeline to be blocked, affecting the accuracy of the test results. Utility Model Content

[0004] In order to solve the problem of serious corrosion of sensor detection components by slag materials in the above-mentioned prior art, the utility model provides an automatic backblowing system for an oxygen sensor for an atmosphere-protected electric slag furnace, which adopts a filtering device in combination with a switch valve 2 to achieve the effect of filtering the detection gas, and its specific technical scheme is: an automatic backblowing system for an oxygen sensor for an atmosphere-protected electric slag furnace, comprising: a support frame, the bottom end of the support frame is respectively provided with an air inlet, a detection port and an air outlet, the interior of the support frame is respectively provided with a filtering device, a mass flow controller and an oxygen content detection device, the air inlet and the air outlet are both connected to the mass flow controller, the detection port is connected to the filtering device, and the end of the filtering device away from the detection port is connected to the oxygen content detection device.

[0005] Preferably, the air inlet is connected to an air inlet pipe, one end of the air inlet pipe away from the air inlet is connected to a three-part piece, and output ports of the three-part piece are respectively connected to connecting pipe one, connecting pipe two and connecting pipe three.

[0006] Preferably, the end of the connecting pipe 1 away from the three-part piece is connected to the mass flow controller, and the end of the mass flow controller away from the connecting pipe 1 is connected to the connecting pipe 4.

[0007] Preferably, one end of the connecting pipe 2 away from the three-part piece is connected to the switch valve 1, and one end of the switch valve 1 away from the connecting pipe 2 is connected to the connecting pipe 5.

[0008] Preferably, the air outlet is connected to an air outlet pipe; and a three-way pipe fitting 1 is connected between the connecting pipe 4, the connecting pipe 5 and the air outlet pipe.

[0009] Preferably, one end of the connecting pipe three away from the three-part piece is connected to the switch valve two, and one end of the switch valve two away from the connecting pipe three is connected to the connecting pipe eight.

[0010] Preferably, a filter tube is connected between the detection port and the filter device, and a connecting tube 6 is connected to one end of the filter device away from the filter tube.

[0011] In addition, the automatic backflush system of oxygen sensor for atmosphere-protected electroslag furnace in the above technical solution provided by the utility model may also have the following characteristics: the oxygen content detection device is connected to a detection tube, the end of the detection tube away from the oxygen content detection device is connected to a switch valve three, and the end of the switch valve three away from the detection tube is connected to a connecting tube seven.

[0012] In the above technical solution, a three-way pipe fitting 2 is connected between the connecting pipe 6, the connecting pipe 7 and the connecting pipe 8.

[0013] The utility model discloses an automatic back-blowing system of an oxygen sensor for an atmosphere-protected electric slag furnace. Compared with the prior art, the beneficial effects are as follows: the automatic back-blowing system of an oxygen sensor for an atmosphere-protected electric slag furnace inflates the protection chamber by opening the switch valve one, and opens the switch valve three to detect the gas in the chamber. After reaching a predetermined value, the switch valve one is closed, and a mass flow controller is used to accurately control the gas in the chamber. Since the detected gas passes through the filter device, the gas is filtered, thereby reducing the pollution and corrosion to the oxygen content detection device; at the same time, at regular intervals, the switch valve three is closed, and the switch valve two is opened to back-blow the filter device to clean the dust and other pollutants in the filter device; since the device is installed outside the protective cover, the gas in the protective cover enters the oxygen sensor after being filtered, thereby reducing the corrosion to the sensor detection, greatly improving the service life of the sensor, filtering a large amount of dust, and improving the accuracy of the detection result. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A cross-sectional schematic diagram of an automatic backflush system of an oxygen sensor for an atmosphere protection electroslag furnace provided by the utility model;

[0015] Figure 2 for Figure 1 A magnified image of point A;

[0016] Figure 3 for Figure 1 The enlarged view of point B;

[0017] in, Figures 1 to 3 The reference numerals and component names are: 1. support frame, 2. air inlet, 3. detection port, 4. air outlet, 5. filtering device, 6. mass flow controller, 7. switch valve one, 8. switch valve two, 9. switch valve three, 10. oxygen content detection device, 11. air inlet pipe, 12. three-part piece, 13. connecting pipe one, 14. connecting pipe two, 15. connecting pipe three, 16. connecting pipe four, 17. connecting pipe five, 18. air outlet pipe, 19. three-way pipe fitting one, 20. connecting pipe six, 21. connecting pipe seven, 22. detection pipe, 23. connecting pipe eight, 24. three-way pipe fitting two, 25. filtering pipe. DETAILED DESCRIPTION

[0018] The following is a combination of specific implementation cases and attached Figure 1-Figure 3 The utility model is further explained, but the utility model is not limited to these embodiments. The utility model provides a technical solution: an automatic backblowing system of an oxygen sensor for an atmosphere-protected electric slag furnace, comprising: a support frame 1, an air inlet 2, a detection port 3 and an air outlet 4 are respectively opened at the bottom end of the support frame 1, the air inlet 2 is connected to an inert gas source, the detection port 3 and the air outlet 4 are respectively connected to a protective cover, and a filter device 5, a mass flow controller 6 and an oxygen content detection device 10 are respectively arranged inside the support frame 1, the gas is precisely controlled by the mass flow controller 6, the oxygen content detection device 10 detects the oxygen content of the gas in the protective cover, and the filter device 5 filters the incoming gas, thereby reducing pollution and corrosion to the oxygen content detection device 10; the air inlet 2 and the air outlet 4 are both connected to the mass flow controller 6, the detection port 3 is connected to the filter device 5, and the end of the filter device 5 away from the detection port 3 is connected to the oxygen content detection device 10.

[0019] As a preferred solution, further, the air inlet 2 is connected to an air inlet pipe 11, one end of the air inlet pipe 11 away from the air inlet 2 is connected to a three-part piece 12, and the output ports of the three-part piece 12 are respectively connected to connecting pipe one 13, connecting pipe two 14 and connecting pipe three 15.

[0020] As a preferred solution, further, one end of the connecting pipe 13 away from the three-part piece 12 is connected to the mass flow controller 6, and one end of the mass flow controller 6 away from the connecting pipe 13 is connected to the connecting pipe 4 16.

[0021] As a preferred solution, further, one end of the connecting pipe 2 14 away from the three-part piece 12 is connected to a switch valve 1 7, and one end of the switch valve 17 away from the connecting pipe 2 14 is connected to a connecting pipe 5 17; open the switch valve 1 7 to discharge the inert gas into the protective cover for inflation; close the switch valve 1 7, and use the mass flow controller 6 to accurately control the gas in the protective cover.

[0022] As a preferred solution, further, the gas outlet 4 is connected to an outlet pipe 18; a three-way pipe fitting 19 is connected between the connecting pipe 4 16, the connecting pipe 5 17 and the outlet pipe 18, and the three-way gas is interconnected through the three-way pipe fitting 19.

[0023] As a preferred solution, further, one end of the connecting pipe three 15 away from the three-part piece 12 is connected to the switch valve two 8, and one end of the switch valve two 8 away from the connecting pipe three 15 is connected to the connecting pipe eight 23; the switch valve two 8 is opened to allow the incoming inert gas to flow through the filter device 5, and the filter device 5 is backblown to clean the dust and other pollutants in the filter device 5.

[0024] As a preferred solution, further, a filter tube 25 is connected between the detection port 3 and the filter device 5, and a connecting tube 6 20 is connected to one end of the filter device 5 away from the filter tube 25.

[0025] As a preferred embodiment, further, the oxygen content detection device 10 is connected to a detection tube 22, the end of the detection tube 22 away from the oxygen content detection device 10 is connected to a switch valve three 9, and the end of the switch valve three 9 away from the detection tube 22 is connected to a connecting tube seven 21; a three-way pipe fitting two 24 is connected between the connecting tube six 20, the connecting tube seven 21 and the connecting tube eight 23; the switch valve three 9 is opened, so that the oxygen content detection device 10 detects the oxygen content of the gas in the protective cover, which is convenient for real-time detection of the oxygen content in the protective cover.

[0026] The filtering device, mass flow controller and oxygen content detection device in this case are prior art, and any of them can be used as long as they meet the requirements of this case.

[0027] Working principle: the electrical components appearing in this application are all connected to the external power supply and control switch when in use. After the utility model is installed, first check the installation and safety protection of the utility model, and then it can be used; when in use, connect the air outlet 4 to the protective cover connection port, connect the air inlet 2 to the inert gas source, and connect the detection port 3 to the protective cover; at the initial stage of smelting, open the switch valve 1 7 to inflate the protective cover, and then open the switch valve 3 9, the gas in the protective cover enters the filter tube 25 through the detection port 3, and then the gas passes through the filter tube 25 into the filter device 5, and passes through the filter device 5 The detection gas is filtered, and the filtered gas enters the oxygen content detection device 10 through the connecting pipe 6 20, the switch valve 3 9 and the detection tube 22 for detection. After reaching the predetermined value, the switch valve 1 7 is closed. Since the detection gas passes through the filter device 5, the gas is filtered, thereby reducing the pollution and corrosion of the oxygen content detection device 10. The mass flow controller 6 is used to accurately control the gas in the protective cover. At the same time, at regular intervals, the switch valve 3 9 is closed, the switch valve 2 8 is opened, the filter device 5 is back-blown, and the dust and other pollutants in the filter device are cleaned.

[0028] In the description of the present invention, the term "plurality" refers to two or more than two. Unless otherwise clearly defined, the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention. The terms "connection", "installation", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An automatic backflush system for an oxygen sensor for an atmosphere-protected electroslag furnace, comprising: A support frame (1), characterized in that an air inlet (2), a detection port (3) and an air outlet (4) are respectively provided at the bottom end of the support frame (1), and a filtering device (5), a mass flow controller (6) and an oxygen content detecting device (10) are respectively provided inside the support frame (1), the air inlet (2) and the air outlet (4) are both connected to the mass flow controller (6), the detection port (3) is connected to the filtering device (5), and the end of the filtering device (5) away from the detection port (3) is connected to the oxygen content detecting device (10).

2. The automatic backflush system for oxygen sensor for atmosphere protection electroslag furnace according to claim 1 is characterized in that: The air inlet (2) is connected to an air inlet pipe (11), one end of the air inlet pipe (11) away from the air inlet (2) is connected to a three-part piece (12), and the output ports of the three-part piece (12) are respectively connected to a connecting pipe 1 (13), a connecting pipe 2 (14) and a connecting pipe 3 (15).

3. The automatic backflush system for oxygen sensor for atmosphere protection electroslag furnace according to claim 2 is characterized in that: The end of the connecting pipe 1 (13) away from the three-part piece (12) is connected to the mass flow controller (6), and the end of the mass flow controller (6) away from the connecting pipe 1 (13) is connected to the connecting pipe 4 (16).

4. The automatic backflush system of oxygen sensor for atmosphere protection electroslag furnace according to claim 3 is characterized in that: The end of the connecting pipe 2 (14) away from the three-part piece (12) is connected to the switch valve 1 (7), and the end of the switch valve 1 (7) away from the connecting pipe 2 (14) is connected to the connecting pipe 5 (17).

5. The automatic backflush system of oxygen sensor for atmosphere protection electroslag furnace according to claim 4 is characterized in that: The air outlet (4) is connected to an air outlet pipe (18); and a three-way pipe piece (19) is connected between the connecting pipe four (16), the connecting pipe five (17) and the air outlet pipe (18).

6. The automatic backflush system of oxygen sensor for atmosphere protection electroslag furnace according to claim 2 is characterized in that: One end of the connecting pipe three (15) away from the three-part piece (12) is connected to the switch valve two (8), and one end of the switch valve two (8) away from the connecting pipe three (15) is connected to the connecting pipe eight (23).

7. The automatic backflush system of oxygen sensor for atmosphere protection electroslag furnace according to claim 6 is characterized in that: A filter tube (25) is connected between the detection port (3) and the filter device (5), and a connecting tube six (20) is connected to one end of the filter device (5) away from the filter tube (25).

8. The automatic backflush system of oxygen sensor for atmosphere protection electroslag furnace according to claim 7 is characterized in that: The oxygen content detection device (10) is connected to a detection tube (22), one end of the detection tube (22) away from the oxygen content detection device (10) is connected to a switch valve three (9), and one end of the switch valve three (9) away from the detection tube (22) is connected to a connecting tube seven (21); a three-way pipe fitting two (24) is connected between the connecting tube six (20), the connecting tube seven (21) and the connecting tube eight (23).

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