Split type double-air-channel molten steel continuous temperature measuring device

Abstract

The utility model relates to a split type double-air-channel molten steel continuous temperature measuring device, and belongs to the technical field of metallurgical temperature measurement. The structure is as follows: a cooling gas passage and a non-oxidizing gas passage which are respectively communicated are arranged in an induced air cable protection sleeve and a temperature measurement detector; the temperature sensing tube comprises an outer protection tube and an air inducing and smoke discharging inner tube, inlets of the cooling gas passage and the non-oxidizing gas passage are respectively positioned at the front end of the air inducing cable protection sleeve, and an outlet of the cooling passage is positioned at the open end of the tail part of the temperature measuring detector; an outlet of the non-oxidizing gas channel is connected with the top of the air inducing and smoke discharging inner pipe, and non-oxidizing gas passes through an opening in the bottom of the air inducing and smoke discharging inner pipe and is discharged through a smoke discharging hole in the temperature sensing pipe. According to the continuous temperature measuring device, a double-gas-path structure is adopted, the front end part of the temperature measuring device is cooled by adopting the compressed gas with lower cost, and the compressed non-oxidizing gas enters a non-oxidizing gas path with smaller flow, so that the production quality of molten steel is ensured, the maintenance period of the temperature measuring detector is prolonged, and the accuracy is improved.

Description

Technical Field

[0001] The utility model relates to a split type double-gas channel molten steel continuous temperature measuring device, belonging to the technical field of metallurgical temperature measurement. Background Art

[0002] Existing continuous temperature measurement devices for molten steel all use cooling air circuits to cool down the temperature measuring elements to prevent the temperature of the temperature measuring elements from being too high, which would affect the accuracy of the temperature measurement. Some products directly use cold air as the cooling medium. During the cooling process, once the temperature sensing tube breaks, air may enter the molten steel, directly affecting the production quality of the molten steel and causing serious losses. Therefore, some other products on the market use non-oxidizing gas as the cooling medium. Since the front end of the temperature measuring device has electrical components, the tube diameter is relatively thick, and very little non-oxidizing gas enters the temperature sensing tube at a later stage, resulting in a waste of non-oxidizing gas, which indirectly increases the manufacturing cost. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a split type dual-gas-channel molten steel continuous temperature measuring device. The continuous temperature measuring device adopts a dual-gas-path structure, uses low-cost cold air as a medium, fills it into the cooling gas passage, completes the cooling of the front end part of the temperature measuring device, and uses compressed non-oxidizing gas to enter the non-oxidizing gas passage with a smaller diameter to complete the inflation of the temperature sensing tube, thereby reducing the amount of compressed non-oxidizing gas used and ensuring the production quality of molten steel under the premise of completing the overall cooling environment.

[0004] To solve the above problems, the specific technical scheme of the utility model is as follows: a split-type dual-gas channel molten steel continuous temperature measuring device, comprising a signal processing display instrument, an induced draft cable protection sleeve, a temperature measuring detector and a temperature sensing tube connected in sequence, the induced draft cable protection sleeve and the temperature measuring detector have cooling gas passages and non-oxidizing gas passages that are connected respectively; the temperature sensing tube comprises an outer protective tube and an induced draft smoke exhaust inner tube, the inlets of the cooling gas passage and the non-oxidizing gas passage are respectively located at the front end of the induced draft cable protection sleeve, and the outlet of the cooling passage is located at the rear opening end of the temperature measuring detector; the outlet of the non-oxidizing gas passage is connected to the top of the induced draft smoke exhaust inner tube, and the non-oxidizing gas passes through the bottom opening of the induced draft smoke exhaust inner tube and is discharged through the smoke exhaust hole on the temperature sensing tube.

[0005] The smoke exhaust hole is located on the outer protective tube or on the induced draft smoke exhaust inner tube; when the smoke exhaust hole is located on the outer protective tube, the smoke exhaust hole is close to the upper end of the tube opening; when the smoke exhaust hole is located on the induced draft smoke exhaust inner tube, the top of the induced draft smoke exhaust inner tube is a double-layer structure, and the smoke exhaust hole is located in the outer layer structure above the outer protective tube.

[0006] The electrical parts or electrical plugs in the draft cable protection sleeve and the temperature measuring detector are respectively provided with inner sealing sleeves, and two adjacent inner sealing sleeves are sealed and connected by a high-temperature hose, and a continuous non-oxidizing gas passage is formed between the inner sealing sleeves and the high-temperature hose; the signal transmission cable connected to the signal processing and display instrument is located in the non-oxidizing gas passage and is connected to the signal output end of the temperature measuring element in the temperature measuring detector.

[0007] An outer casing is arranged outside the draft cable protection sleeve and the temperature measuring detector, and a cooling gas passage is formed between the outer casing and the corresponding inner sealing sleeve or high-temperature rubber hose.

[0008] The front end of the air induced cable protection sleeve is a gas connector, and the rear end is a sub-cable connector. The connector body of the gas connector and the sub-outer shell of the sub-cable connector are connected by an outer protective bellows to form the outer shell of the air induced cable protection sleeve; the sub-cable connector is plugged into and matched with the female cable connector arranged at the front end of the temperature measuring detector.

[0009] The structure of the gas joint is as follows: a floating joint is sealed and connected in the inner cavity of the joint body, a through hole is provided at the axis of the floating joint, an annular cavity is provided on the outer circumference, and radial holes communicating with the through hole are provided on the annular cavity; a non-oxidizing gas joint and a cooling gas joint are provided on the outer circumference of the joint body; the non-oxidizing gas joint is communicated with the through hole through the annular cavity and the radial holes; the floating joint forms an inner sealing sleeve and is connected to the high-temperature rubber hose.

[0010] The sub-cable connector comprises a sub-shell, a sub-plug socket and a sub-electrical plug; the sub-shell and the sub-plug socket are coaxially matched; the sub-electrical plug is connected to the sub-plug socket; the female cable connector comprises a female shell, a female plug socket and a female electrical plug; the female shell and the female plug socket are coaxially matched; the female plug socket is connected to the female electrical plug; sealing rings are respectively provided on the outer circumferences of the sub-shell and the sub-plug socket, and the inner circumferences of the female shell and the female plug socket are respectively sealed and plugged with the outer circumferences of the sub-shell and the sub-plug socket through sealing rings, and the sub-electrical plug is plugged and matched with the female electrical plug; the sub-shell and the female shell are plugged together to form an outer shell, and the sub-plug socket and the female plug socket are plugged together to form an inner sealing sleeve, and the two ends of the sub-plug socket and the female plug socket are respectively connected to high-temperature hoses through starting joints.

[0011] The rear end of the temperature measuring detector is provided with a shell integrally connected to the mother shell body, and the shell and the mother shell body form an outer shell body; a temperature measuring element outer cover is provided in the inner cavity of the shell, and the temperature measuring element outer cover forms an inner sealing sleeve; a temperature measuring element is provided in the temperature measuring element outer cover; one end of the temperature measuring element outer cover is connected to the female plug socket through a high-temperature hose, and the other end of the temperature measuring element outer cover is connected to the air guide sleeve, and the air guide sleeve is connected to the inner pipe of the air induced smoke exhaust.

[0012] The cooling gas passage is fed with compressed nitrogen or compressed air, with a gas source pressure of 0.4-0.8Mpa, a flow rate of 12m³ / H, and a flow channel cross-sectional area of ​​≥50mm 2 .

[0013] The non-oxidizing gas passage is fed with compressed nitrogen or compressed argon, with a gas source pressure of 0.05-0.8Mpa, a flow rate of 0.05-2m³ / H, and a flow channel cross-sectional area of ​​≥5mm 2 .

[0014] The split double-gas-channel molten steel continuous temperature measuring device of the present application adopts the above structure and has the following advantages:

[0015] 1. The present application adopts a dual-airway structure to form various independently operated passages, which not only plays a cooling role, but also saves the amount of non-oxidizing gas and ensures the quality of molten steel;

[0016] 2. Both the draft cable protection sleeve and the temperature detector adopt an inner sealing sleeve and an outer casing structure. The outer casings are connected to each other to form a cooling gas passage, and the inner sealing sleeve is connected to the inner sealing sleeve through a high-temperature hose to form a non-oxidizing gas passage;

[0017] 3. The signal transmission cable is arranged in the non-oxidizing gas passage to save space and optimize the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall connection of the split-type dual-gas channel molten steel continuous temperature measurement device.

[0019] Figure 2 It is a schematic diagram of the local structure of the temperature sensing tube with the smoke exhaust hole located on the outer protective tube.

[0020] Figure 3 It is a schematic diagram of the partial structure of the temperature sensing tube where the smoke exhaust hole is located on the inner pipe of the induced draft smoke exhaust.

[0021] Figure 4 This is a schematic diagram of the structure of the draft cable protection sleeve.

[0022] Figure 5 for Figure 2 AA section view.

[0023] Figure 6 for Figure 2 Enlarged view of point B.

[0024] Figure 7 This is a schematic diagram of the structure of the temperature measuring detector. DETAILED DESCRIPTION

[0025] like Figure 1As shown, a split type double-gas channel molten steel continuous temperature measuring device comprises a signal processing display instrument 1, an induced draft cable protection sleeve 2, a temperature measuring detector 3 and a temperature sensing tube 4 which are connected in sequence, the induced draft cable protection sleeve 2 and the temperature measuring detector 3 are provided with cooling gas passages and non-oxidizing gas passages which are connected respectively; the temperature sensing tube 4 comprises an outer protection tube 4-1 and an induced draft smoke exhaust inner tube 4-2, the inlets of the cooling gas passage and the non-oxidizing gas passage are respectively located at the front end of the induced draft cable protection sleeve 2, and the outlet of the cooling passage is located at the rear opening end of the temperature measuring detector 3; the outlet of the non-oxidizing gas passage is connected to the top of the induced draft smoke exhaust inner tube 4-2, the non-oxidizing gas passes through the bottom opening of the induced draft smoke exhaust inner tube 4-2, and is discharged through the smoke exhaust hole 4-3 on the temperature sensing tube 4. Two interconnected gas paths are provided inside the draft cable protection sleeve 2 and the temperature detector 3, thereby realizing a large-flow cooling function and a small-flow non-oxidizing gas purging smoke and dust. Meanwhile, the large-flow cooling gas is discharged above the tundish cover without affecting the quality of the molten steel, and the non-oxidizing gas is used to purge the smoke and dust. Even if cracks occur in the temperature sensing tube, it will not cause product quality problems of the molten steel, thereby reducing the gas source cost and extending the maintenance time.

[0026] like Figure 2 and Figure 3 As shown, the smoke exhaust hole 4-3 is located on the outer protection tube 4-1 or on the induced draft smoke exhaust inner tube 4-2; when the smoke exhaust hole 4-3 is located on the outer protection tube 4-1, the smoke exhaust hole 4-3 is close to the upper end of the tube; when the smoke exhaust hole 4-3 is located on the induced draft smoke exhaust inner tube 4-2, the top of the induced draft smoke exhaust inner tube 4-2 is a double-layer structure, and the smoke exhaust hole 4-3 is located at the outer layer structure above the outer protection tube 4-1. In this way, the non-oxidizing gas is discharged upward after being purged in the inner tube.

[0027] like Figure 4 As shown, the electrical parts or electrical plugs in the draft cable protection sleeve 2 and the temperature detector 3 are respectively provided with inner sealing sleeves, and the two adjacent inner sealing sleeves are sealed and connected by a high-temperature hose 5, and a continuous non-oxidizing gas passage is formed between the inner sealing sleeves and the high-temperature hose 5; the signal transmission cable 6 connected to the signal processing display instrument 1 is located in the non-oxidizing gas passage, and is connected to the signal output end of the temperature measuring element 7 in the temperature detector 3. The non-oxidizing gas is continuously transmitted through the inner sealing sleeve, and its signal transmission cable 6 is also located therein, as shown in FIG. Figure 5 As shown, the space occupied by separate transmission is saved, and the transmission cable is cooled and protected against bending.

[0028] An outer casing is provided outside the air cable protection sleeve 2 and the temperature measuring detector 3, and a cooling gas passage is formed between the outer casing and the corresponding inner sealing sleeve or high-temperature rubber hose 5. The cooling gas forms an annular cavity, which can wrap the temperature measuring element and improve the cooling efficiency of the temperature measuring element.

[0029] like Figure 6As shown, the front end of the draft cable protection sleeve 2 is a gas connector 21, and the rear end is a sub-cable connector 22. The connector body 2-5 of the gas connector 21 and the sub-outer shell 2-11 of the sub-cable connector 22 are connected through an outer protective bellows 2-4 to form the outer shell of the draft cable protection sleeve 2; the sub-cable connector 22 is plugged into and matched with the female cable connector 31 arranged at the front end of the temperature detector 3.

[0030] The structure of the gas connector 21 is as follows: a floating connector 2-1 is sealed and connected in the inner cavity of the connector body 2-5, a through hole is provided at the axis of the floating connector 2-1, an annular cavity 2-6 is provided on the outer circumference, and a radial hole 2-7 communicating with the through hole is provided on the annular cavity 2-6; a non-oxidizing gas connector 2-2 and a cooling gas connector 2-3 are provided on the outer circumference of the connector body 2-5; the non-oxidizing gas connector 2-2 is communicated with the through hole through the annular cavity 2-6 and the radial hole 2-7; the floating connector 2-1 forms an inner sealing sleeve and is connected to the high-temperature hose 5.

[0031] like Figure 6 and Figure 7 As shown, the sub-cable connector 22 includes a sub-shell 2-11, a sub-plug socket 2-12 and a sub-electrical plug 2-13; the sub-shell 2-11 is coaxially matched with the sub-plug socket 2-12; the sub-electrical plug 2-13 is matched with the sub-plug socket 2-12; the female cable connector 31 includes a female shell 3-11, a female plug socket 3-12 and a female electrical plug 3-13; the female shell 3-11 is coaxially matched with the female plug socket 3-12; the female plug socket 3-12 is matched with the female electrical plug 3-13; the sub-shell 2-11 and the sub-plug socket 2 -12 are respectively provided with sealing rings on their outer circumferences, the inner circumferences of the female outer shell 3-11 and the female plug seat 3-12 are respectively plugged and sealed with the outer circumferences of the sub-shell 2-11 and the sub-plug seat 2-12 through the sealing rings, and the sub-electrical plug 2-13 is plugged and matched with the female electrical plug 3-13; the sub-shell 2-11 and the female outer shell 3-11 are plugged together to form an outer shell, and the sub-plug seat 2-12 and the female plug seat 3-12 are plugged together to form an inner sealing sleeve, and the two ends of the sub-plug seat 2-12 and the female plug seat 3-12 are respectively connected to the high-temperature hose 5 through the starting joint. After the above-mentioned sub-cable connector 22 and the female cable connector 31 are plugged together, not only the normal plugging of the electrical plug is guaranteed, but also the cooling gas passage and the non-oxidizing gas passage are reserved, thereby ensuring the independent operation of the two gas paths.

[0032] like Figure 7As shown, the rear end of the temperature measuring detector 3 is provided with a shell 3-1 which is integrally connected to the mother shell body 3-11, and the shell 3-1 and the mother shell body 3-11 form an outer shell; the circumference of the lower end of the shell 3-1 is provided with cooling air exhaust holes 3-4 which are evenly distributed around the circumference; the inner cavity of the shell 3-1 is provided with a temperature measuring element outer cover 3-3, and the temperature measuring element outer cover 3-3 forms an inner sealing sleeve; a temperature measuring element 7 is provided in the temperature measuring element outer cover 3-3; one end of the temperature measuring element outer cover 3-3 is connected to the female plug socket 3-12 through a high-temperature rubber hose 5, and the other end of the temperature measuring element outer cover 3-3 is connected to the air guide sleeve 3-2, and the air guide sleeve 3-2 is connected to the air exhaust inner pipe 4-2.

[0033] The cooling gas passage is fed with compressed nitrogen or compressed air, with a gas source pressure of 0.4-0.8Mpa, a flow rate of 12m³ / H, and a flow channel cross-sectional area of ​​≥50mm 2 The non-oxidizing gas passage is fed with compressed nitrogen or compressed argon, with a gas source pressure of 0.05-0.8Mpa, a flow rate of 0.05-2m³ / H, and a flow channel cross-sectional area of ​​≥5mm 2 . According to the calculation of a single temperature measuring tube, the service life is 24 hours, the standard gas source consumption is 0.4Mpa, 12m³ / h, the original single gas source consumption is 288 m³ of argon, while this application consumes 3m³ of argon and 288 m³ of compressed air. The amount of non-oxidizing gas is 1% of the original single gas source, which greatly reduces the measurement cost. At the same time, the dual-airway measurement system is adopted, and the dust attenuation cycle of the system lens is extended by 2 to 3 times. In addition, the non-oxidizing gas channel is supplied separately with a fixed flow rate, so the temperature field of the temperature measurement system is constant, and the measurement temperature of the system is improved.

Claims

1. A split type dual-airway molten steel continuous temperature measurement device, comprising a signal processing display instrument (1), an air induced cable protection sleeve (2), a temperature measuring detector (3) and a temperature sensing tube (4) connected in sequence, characterized in that: The draft cable protection sleeve (2) and the temperature detector (3) have cooling gas passages and non-oxidizing gas passages that are connected to each other respectively; the temperature sensing tube (4) comprises an outer protection tube (4-1) and an draft smoke exhaust inner tube (4-2); the inlets of the cooling gas passage and the non-oxidizing gas passage are respectively located at the front end of the draft cable protection sleeve (2); the outlet of the cooling passage is located at the rear opening end of the temperature detector (3); the outlet of the non-oxidizing gas passage is connected to the top of the draft smoke exhaust inner tube (4-2); the non-oxidizing gas passes through the bottom opening of the draft smoke exhaust inner tube (4-2) and is discharged through the smoke exhaust hole (4-3) on the temperature sensing tube (4).

2. The split type dual-gas channel molten steel continuous temperature measuring device according to claim 1 is characterized in that: The smoke exhaust hole (4-3) is located on the outer protective tube (4-1) or on the induced draft smoke exhaust inner tube (4-2); when the smoke exhaust hole (4-3) is located on the outer protective tube (4-1), the smoke exhaust hole (4-3) is close to the upper end of the tube opening; when the smoke exhaust hole (4-3) is located on the induced draft smoke exhaust inner tube (4-2), the top of the induced draft smoke exhaust inner tube (4-2) is a double-layer structure, and the smoke exhaust hole (4-3) is located on the outer layer structure above the outer protective tube (4-1).

3. The split type dual-gas channel molten steel continuous temperature measuring device according to claim 1 is characterized in that: The electrical parts or electrical plugs in the draft cable protection sleeve (2) and the temperature detector (3) are respectively provided with inner sealing sleeves, and two adjacent inner sealing sleeves are sealed and connected via a high-temperature rubber hose (5), so that a continuous non-oxidizing gas passage is formed between the inner sealing sleeves and the high-temperature rubber hose (5); a signal transmission cable (6) connected to the signal processing display instrument (1) is located in the non-oxidizing gas passage and is connected to the signal output end of the temperature measuring element (7) in the temperature detector (3).

4. The split type dual-gas channel molten steel continuous temperature measuring device according to claim 3 is characterized in that: An outer casing is provided outside the draft cable protection sleeve (2) and the temperature measuring detector (3), and a cooling gas passage is formed between the outer casing and the corresponding inner sealing sleeve or high-temperature rubber hose (5).

5. The split type dual-gas channel molten steel continuous temperature measuring device according to claim 4 is characterized in that: The front end of the draft cable protection sleeve (2) is a gas connector (21), and the rear end is a sub-cable connector (22); the connector body (2-5) of the gas connector (21) and the sub-outer shell (2-11) of the sub-cable connector (22) are connected via an outer protective corrugated tube (2-4), thereby forming an outer shell of the draft cable protection sleeve (2); the sub-cable connector (22) is plug-fitted with a female cable connector (31) provided at the front end of the temperature measuring detector (3).

6. The split type dual-gas channel molten steel continuous temperature measuring device according to claim 5 is characterized in that: The structure of the gas joint (21) is as follows: the inner cavity of the joint body (2-5) is sealed to connect the floating joint (2-1); the axis of the floating joint (2-1) is provided with a through hole, the outer circumference is provided with an annular cavity (2-6), and the annular cavity (2-6) is provided with a radial hole (2-7) communicating with the through hole; a non-oxidizing gas joint (2-2) and a cooling gas joint (2-3) are provided on the outer circumference of the joint body (2-5); the non-oxidizing gas joint (2-2) is communicated with the through hole through the annular cavity (2-6) and the radial hole (2-7); the floating joint (2-1) forms an inner sealing sleeve and is connected to the high-temperature rubber hose (5).

7. The split type dual-gas channel molten steel continuous temperature measuring device according to claim 5 is characterized in that: The sub-cable connector (22) comprises a sub-shell (2-11), a sub-plug socket (2-12) and a sub-electrical plug (2-13); the sub-shell (2-11) and the sub-plug socket (2-12) are coaxially matched; the sub-electrical plug (2-13) is matched to the sub-plug socket (2-12); the female cable connector (31) comprises a female shell (3-11), a female plug socket (3-12) and a female electrical plug (3-13); the female shell (3-11) and the female plug socket (3-12) are coaxially matched; the female plug socket (3-12) is matched to the female electrical plug (3-13); The outer circumference of the seat (2-12) is respectively provided with a sealing ring, and the inner circumference of the female outer shell (3-11) and the female plug seat (3-12) is sealed and plugged with the outer circumference of the sub-shell shell (2-11) and the sub-plug seat (2-12) through the sealing ring, and the sub-electrical plug (2-13) and the female electrical plug (3-13) are plugged and matched; the sub-shell shell (2-11) and the female outer shell (3-11) are plugged to form an outer shell, and the sub-plug seat (2-12) and the female plug seat (3-12) are plugged to form an inner sealing sleeve, and the two ends of the sub-plug seat (2-12) and the female plug seat (3-12) are respectively connected to the high-temperature hose (5) through the starting joint.

8. The split type dual-gas channel molten steel continuous temperature measuring device according to claim 7 is characterized in that: The rear end of the temperature measuring detector (3) is provided with a shell (3-1) integrally connected to the female shell (3-11), and the shell (3-1) and the female shell (3-11) form an outer shell; a temperature measuring element outer cover (3-3) is provided in the inner cavity of the shell (3-1), and the temperature measuring element outer cover (3-3) forms an inner sealing sleeve; a temperature measuring element (7) is provided in the temperature measuring element outer cover (3-3); one end of the temperature measuring element outer cover (3-3) is connected to the female plug socket (3-12) through a high-temperature rubber hose (5), and the other end of the temperature measuring element outer cover (3-3) is connected to the air guide sleeve (3-2), and the air guide sleeve (3-2) is connected to the air induced smoke exhaust inner pipe (4-2).

9. The split type dual-gas channel molten steel continuous temperature measuring device according to claim 1 is characterized in that: The cooling gas passage is fed with compressed nitrogen or compressed air, with a gas source pressure of 0.4-0.8Mpa, a flow rate of 12m³ / H, and a flow channel cross-sectional area of ​​≥50mm 2 .

10. The split type dual-gas channel molten steel continuous temperature measuring device according to claim 1, characterized in that: The non-oxidizing gas passage is fed with compressed nitrogen or compressed argon, with a gas source pressure of 0.05-0.8Mpa, a flow rate of 0.05-2m³ / H, and a flow channel cross-sectional area of ​​≥5mm 2 .

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