Air brick with temperature monitoring and early warning functions

Abstract

The utility model relates to the technical field of air bricks, and discloses an air brick with temperature monitoring and early warning, which comprises an air brick body, an air chamber shell, an air inlet pipe, an air vent pipe, a protective sleeve and a thermocouple probe, the air chamber shell is embedded in the air brick body, and the air chamber shell is provided with an air inlet and an air outlet which are communicated with an air chamber; the air inlet pipe is connected with the air inlet, and the end part of the air inlet pipe protrudes out of the outer side of the air brick body; the vent pipe penetrates through the air brick body, one end of the vent pipe is connected with the air outlet, and the other end of the vent pipe extends to the end face of the air brick body; a temperature measuring hole penetrating through the air chamber shell is formed in the air brick body, the protective sleeve is inserted into the temperature measuring hole, the pipe wall of the protective sleeve is connected with the air chamber shell in a sealed mode, and the pipe wall of the protective sleeve is further provided with an air vent communicated with the air chamber. The thermocouple probe is inserted into the protective sleeve, the tail part of the thermocouple probe is hermetically connected with the protective sleeve, and the head of the thermocouple probe is abutted against and matched with the bottom of the temperature measuring hole.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of gas -permeable brick, in particular to a gas -permeable brick with temperature monitoring early warning. BACKGROUND

[0002] In steel metallurgical engineering, gas -permeable brick is the key function piece of steel ladle refining, converter bottom blowing, electric furnace bottom blowing and other smelting processes. Through the gas -permeable brick to the high -temperature container such as ladle, converter, electric furnace blows argon, stirs molten steel, is used for adjusting the uniformity of molten steel temperature, and the gas blowing stirring also makes alloy and deoxidizer in molten steel evenly dispersed, improves the cleanliness.

[0003] Since the gas -permeable brick is contacted with molten steel and is continuously eroded and worn, if not timely replacement, it is easy to cause molten steel leakage. Subsequent development such as the Chinese utility model patent with the publication number CN207592768U and the authorized announcement date of 2018.07.10 discloses a kind of gas -permeable brick with temperature sensing for steel ladle, including gas -permeable brick body, stainless steel sleeve, graphite sleeve, filler, temperature sensor and stainless steel bottom plate, gas -permeable brick body is provided with counterbore from bottom surface upwards, stainless steel sleeve is located in counterbore, graphite sleeve is located in the inner hole of stainless steel sleeve, temperature sensor is located in graphite sleeve, filler is filled in the inner hole of graphite sleeve and wraps temperature sensor, stainless steel bottom plate is located in the bottom surface of gas -permeable brick body, the opening end of stainless steel sleeve is welded with stainless steel bottom plate, the compensation lead of temperature sensor is led out of stainless steel bottom plate.

[0004] The existing gas -permeable brick for steel ladle is provided with temperature sensor, utilizes stainless steel sleeve, graphite sleeve, filler to wrap temperature sensor, and multiple layers of wrapping structure can affect temperature sensing sensitivity;And, when molten steel erosion is close to temperature sensor, multiple layers of wrapping structure can be burned by high temperature of molten steel, and it is easy to cause molten steel leakage of gas -permeable brick. UTILITY MODEL CONTENT

[0005] The utility model solves the technical problems that the multiple layers of wrapping structure in the existing gas -permeable brick can affect temperature sensing sensitivity, and when molten steel erosion is close to temperature sensor, multiple layers of wrapping structure can be burned by high temperature of molten steel, and it is easy to cause molten steel leakage of gas -permeable brick.

[0006] In order to solve the above technical problems, the utility model provides a kind of technical scheme of gas -permeable brick with temperature monitoring early warning:

[0007] The gas -permeable brick with temperature monitoring early warning includes gas -permeable brick body, gas chamber shell, gas inlet pipe, gas -permeable pipe, protective sleeve and thermocouple probe, the gas chamber shell is embedded in the gas -permeable brick body, the gas chamber shell is provided with the gas inlet and gas outlet that communicate gas chamber;

[0008] The air inlet pipe is connected with the air inlet, and the end of the air inlet pipe protrudes outside the air brick body; the air pipe is arranged in the air brick body, and one end of the air pipe is connected with the air outlet, and the other end of the air pipe extends to the end face of the air brick body;

[0009] The air brick body is internally provided with a temperature measuring hole penetrating through the air chamber shell, the protective sleeve is inserted into the temperature measuring hole, and the pipe wall of the protective sleeve is sealingly connected with the air chamber shell, and the pipe wall of the protective sleeve is further provided with an air passage opening communicating with the air chamber.

[0010] The thermocouple probe is inserted into the protective sleeve, the tail of the thermocouple probe is sealingly connected with the protective sleeve, and the needle of the thermocouple probe is in abutting engagement with the hole bottom of the temperature measuring hole.

[0011] Further, the profile shape of the air brick body is cylindrical or polygonal, the air pipe and the temperature measuring hole are respectively arranged in the axial direction of the air brick body, and the air pipe and the temperature measuring hole are arranged in parallel and spaced apart.

[0012] Further, the radial distance between the protective sleeve and the central axis of the air brick body is less than or equal to 30mm, and the protective sleeve is a steel sleeve with a diameter of 2mm to 5mm.

[0013] Further, the hole bottom of the temperature measuring hole is located in the range of one-third to two-thirds of the air brick body in the axial direction.

[0014] Further, the tail of the thermocouple probe is provided with a threaded joint, the air brick body is provided with a fixing pipe corresponding to one side of the tail of the thermocouple probe, and the threaded joint is threadedly connected with the fixing pipe.

[0015] Further, the tail of the thermocouple probe is further connected with an extension lead, and the extension lead is externally provided with a glass fiber braided tube.

[0016] Further, the air pipe is provided with a plurality of air pipes, and the plurality of air pipes are distributed in parallel and spaced apart in the air brick body.

[0017] Further, the plurality of air pipes are circumferentially spaced apart about the central axis of the air brick body, and the air inlet pipe is arranged on the central axis of the air brick body.

[0018] Further, the air pipe is an air-permeable steel pipe, and the diameter of the air-permeable steel pipe is less than or equal to 3mm.

[0019] Further, the thermocouple probe is a platinum-rhodium 13-platinum type thermocouple probe.

[0020] The breathable brick with temperature monitoring and early warning has the beneficial effects that: the breathable brick with temperature monitoring and early warning adopts the structural design of the breathable brick body, the air chamber shell, the air inlet pipe, the breathable pipe, the protective sleeve and the thermocouple probe, the air chamber shell is embedded in the breathable brick body, the air inlet pipe is connected with the air inlet of the air chamber shell, the end of the air inlet pipe protrudes from the outer side of the breathable brick body, the breathable pipe is arranged in the breathable brick body and connected with the air outlet, and the other end of the breathable pipe extends to the end of the breathable brick body.

[0021] The inside of the breathable brick body is provided with a temperature measuring hole, the protective sleeve is inserted into the temperature measuring hole, and the thermocouple probe is inserted into the protective sleeve; the temperature measuring hole is used to accommodate the thermocouple probe to extend into the inside of the breathable brick body, the protective sleeve effectively limits and protects the thermocouple probe, and the installation reliability of the thermocouple probe is ensured.

[0022] The working principle is that: the temperature data is transmitted to the monitoring system in real time, the monitoring system can calculate the remaining thickness of the breathable brick body according to the preset temperature-thickness corresponding relationship, and the alarm is triggered when the set safety residual thickness threshold is reached. In addition, the pipe wall of the protective sleeve is sealingly connected with the air chamber shell, the pipe wall of the protective sleeve is also provided with a gas passage opening in communication with the air chamber, and the tail of the thermocouple probe is sealingly connected with the protective sleeve. In the safe case, the protective gas in the air chamber shell enters the protective sleeve through the gas passage opening and is blocked in the temperature measuring hole and is difficult to penetrate the breathable brick body. If the loss reaches the needle of the thermocouple probe, the protective gas is discharged from the bottom of the temperature measuring hole to the outside of the breathable brick body, which is equivalent to forming a positive pressure gas protection for the thermocouple probe in the temperature measuring hole, thereby avoiding the problem of molten steel leakage of the breathable brick. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a front view of the breathable brick with temperature monitoring and early warning in the embodiment of the utility model;

[0024] Figure 2 is Figure 1 a sectional view of the breathable brick with temperature monitoring and early warning in the embodiment of the utility model at A-A;

[0025] Figure 3 is Figure 1 a sectional view of the breathable brick with temperature monitoring and early warning in the embodiment of the utility model at B-B;

[0026] In the figure: 1 - the air brick body, 10 - temperature measuring hole, 2 - air chamber shell, 21 - air inlet, 22 - air outlet, 3 - air inlet pipe, 4 - air pipe, 5 - protective sleeve, 50 - air vent, 6 - thermocouple probe, 61 - threaded joint, 62 - extension wire, 7 - fixed tube. DETAILED DESCRIPTION

[0027] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application, but not to limit the scope of the present application.

[0028] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like in the present application are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0029] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0030] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] As Figures 1 to 3As shown, the utility model discloses a kind of vent brick with temperature monitoring early warning, including vent brick body 1, air chamber shell 2, air inlet pipe 3, vent pipe 4, protective sleeve 5 and thermocouple probe 6, air chamber shell 2 is embedded in vent brick body 1, air chamber is equipped in air chamber shell 2, air chamber shell 2 is equipped with the air inlet 21 and air outlet 22 of intercommunication air chamber;Air inlet pipe 3 is connected with air inlet 21, and the end of air inlet pipe 3 protrudes from the outside of vent brick body 1;Vent pipe 4 is arranged in vent brick body 1, and one end of vent pipe 4 is connected with air outlet 22, and the other end of vent pipe 4 extends to the end surface of vent brick body 1.

[0032] Temperature measuring hole 10 is opened in the inside of vent brick body 1, and protective sleeve 5 is inserted in temperature measuring hole 10, and the tube wall of protective sleeve 5 is sealingly connected with air chamber shell 2, and the tube wall of protective sleeve 5 is also provided with the air vent 50 of intercommunication air chamber;Thermocouple probe 6 is inserted in protective sleeve 5, and the tail of thermocouple probe 6 is sealingly connected with protective sleeve 5, and the needle of thermocouple probe 6 is abuttingly matched with the hole bottom of temperature measuring hole 10.

[0033] The vent brick with temperature monitoring early warning adopts the structural design of vent brick body 1, air chamber shell 2, air inlet pipe 3, vent pipe 4, protective sleeve 5 and thermocouple probe 6, air chamber shell 2 is embedded in vent brick body 1, air inlet pipe 3 is connected with the air inlet 21 of air chamber shell 2, and the end of air inlet pipe 3 protrudes from the outside of vent brick body 1, vent pipe 4 is arranged in vent brick body 1 and connected with air outlet 22, and the other end of vent pipe 4 extends to the end of vent brick body 1. When using, protective gas is passed into air chamber shell 2 from air inlet pipe 3, and is shunted into vent pipe 4 in air chamber, and the protective gas flows along vent pipe 4 and is discharged outside vent brick body 1, so as to play the role of blowing and stirring to high-temperature molten steel in ladle.

[0034] Among them, temperature measuring hole 10 is opened in the inside of vent brick body 1, protective sleeve 5 is inserted in temperature measuring hole 10, and thermocouple probe 6 is inserted in protective sleeve 5, and temperature measuring hole 10 is used to accommodate thermocouple probe 6 to extend into the inside of vent brick body 1, protective sleeve 5 effectively limits and protects thermocouple probe 6, and the installation reliability of thermocouple probe 6 is ensured. Moreover, the needle of thermocouple probe 6 is abuttingly matched with the hole bottom of temperature measuring hole 10, the needle of thermocouple probe 6 is directly contacted with vent brick body 1, and the temperature of vent brick body 1 can be sensitively detected, so as to accurately monitor the remaining thickness of vent brick body 1.

[0035] The working principle is that the temperature data is transmitted to the monitoring system in real time, and the monitoring system can calculate the remaining thickness of the gas permeable brick body 1 according to the preset temperature-thickness corresponding relationship, and trigger an alarm when the set safety residual thickness threshold is reached. In addition, the pipe wall of the protective sleeve 5 is sealingly connected with the gas chamber shell 2, and the pipe wall of the protective sleeve 5 is also provided with a vent 50 communicating with the gas chamber, and the tail of the thermocouple probe 6 is sealingly connected with the protective sleeve 5. In a safe situation, the protective gas in the gas chamber shell 1 enters the protective sleeve 5 through the vent 50 and is blocked in the temperature measuring hole 10 and is difficult to penetrate the gas permeable brick body 1. If the loss reaches the needle of the thermocouple probe 6, the protective gas is discharged from the bottom of the temperature measuring hole 10 to the outside of the gas permeable brick body 1, which is equivalent to forming a positive pressure gas protection for the thermocouple probe 6 in the temperature measuring hole 10, thereby avoiding the problem of molten steel leakage of the gas permeable brick.

[0036] In the embodiment, the contour shape of the gas permeable brick body 1 is cylindrical, the gas permeable pipe 4 and the temperature measuring hole 10 are respectively arranged along the axial direction of the gas permeable brick body 1, and the gas permeable pipe 4 and the temperature measuring hole 10 are arranged in parallel and spaced apart, which ensures the reliable isolation between the gas permeable channel and the temperature measuring channel. Moreover, the radial distance between the protective sleeve 5 and the central axis of the gas permeable brick body 1 is less than or equal to 30 mm, and the protective sleeve 5 is a steel sleeve with a diameter of 2 mm to 5 mm. In order to meet different use requirements, the contour shape of the gas permeable brick body can also be designed as a polygonal prism in other embodiments.

[0037] Specifically, the bottom of the temperature measuring hole 10 is located in the range of one-third to two-thirds of the gas permeable brick body 1 in the axial direction. As a further preferred embodiment, the bottom of the temperature measuring hole 10 is located at one-half of the axial direction of the gas permeable brick body 1, that is, when the gas permeable brick body 1 is close to half of the thickness, an alarm can be triggered to remind the replacement of the gas permeable brick on the furnace bottom.

[0038] It should be noted that the tail of the thermocouple probe 6 is provided with a threaded joint 61, the gas permeable brick body 1 is provided with a fixed pipe 7 corresponding to the tail side of the thermocouple probe 6, and the threaded joint 61 is threadedly connected with the fixed pipe 7. The protective sleeve 5 is arranged in the fixed pipe 7, and the threaded joint 61 of the thermocouple probe 6 is threadedly connected with the fixed pipe 7, which not only plays a stable axial limiting role on the thermocouple probe 6, but also forms a sealing fit between the threaded joint 61 and the end of the protective sleeve 5, thereby ensuring the sealing reliability of the tail of the protective sleeve 5.

[0039] The tail of the thermocouple probe is also connected with an extension lead 62, and the extension lead 62 is externally sleeved with a glass fiber braided tube. The glass fiber braided tube has good high temperature resistance and can withstand a temperature environment of 400℃ or above, ensuring stable transmission of temperature data in a high temperature environment.

[0040] In the embodiment, the air permeable pipes 4 are provided in plurality, and the plurality of air permeable pipes 4 are distributed in parallel and at intervals in the interior of the air permeable brick body 1. In addition, the plurality of air permeable pipes 4 are distributed at intervals in a circumferential direction about the central axis of the air permeable brick body 1, and the air inlet pipe 3 is arranged on the central axis of the air permeable brick body 1. The air permeable pipes 4 are arranged in a dispersed manner in plurality, so that the uniformity of air blowing of the air permeable brick is ensured. In addition, the air permeable pipes 4 are air permeable steel pipes, and the diameter of the air permeable steel pipes is less than or equal to 3 mm. The thermocouple probe 6 is a platinum-rhodium 13-platinum type thermocouple probe.

[0041] The above merely describes the preferred embodiments of the present application, and it should be noted that, for those skilled in the art, without departing from the technical principles of the present application, a plurality of improvements and replacements can be made, and these improvements and replacements should also be considered as the protection scope of the present application.

Claims

1. A venting brick with temperature monitoring warning, characterized in that, The air brick body, the air chamber shell, the air inlet pipe, the air pipe, the protective sleeve and the thermocouple probe, the air chamber shell is embedded in the air brick body, the air chamber shell is provided with air inlet and air outlet; The air inlet pipe is connected with the air inlet, and the end of the air inlet pipe protrudes outside the air brick body; the air pipe is arranged in the air brick body, and one end of the air pipe is connected with the air outlet, and the other end of the air pipe extends to the end face of the air brick body; The air brick body is internally provided with a temperature measuring hole penetrating through the air chamber shell, the protective sleeve is inserted into the temperature measuring hole, and the tube wall of the protective sleeve is sealingly connected with the air chamber shell, and the tube wall of the protective sleeve is also provided with an air inlet communicating with the air chamber; The thermocouple probe is inserted into the protective sleeve, the tail of the thermocouple probe is sealingly connected with the protective sleeve, and the needle of the thermocouple probe is in abutting engagement with the hole bottom of the temperature measuring hole.

2. The air brick with temperature monitoring warning according to claim 1, characterized in that, The profile shape of the air brick body is cylindrical or polygonal, the air pipe and the temperature measuring hole are respectively arranged along the axial direction of the air brick body, and the air pipe and the temperature measuring hole are arranged in parallel and spaced apart.

3. The air brick with temperature monitoring warning according to claim 2, characterized in that, The radial distance between the protective sleeve and the central axis of the air brick body is less than or equal to 30mm, and the protective sleeve is a steel sleeve with a diameter of 2-5mm.

4. The air brick with temperature monitoring warning according to any one of claims 1 to 3, characterized in that, The hole bottom of the temperature measuring hole is located in the range of one-third to two-thirds of the air brick body in the axial direction.

5. The air brick with temperature monitoring warning according to any one of claims 1 to 3, characterized in that, The tail of the thermocouple probe is provided with a threaded joint, and the air brick body is provided with a fixing tube corresponding to one side of the tail of the thermocouple probe, and the threaded joint is threadedly connected with the fixing tube.

6. The air brick with temperature monitoring warning according to claim 5, characterized in that, The tail of the thermocouple probe is also connected with an extension lead, and the extension lead is externally provided with a glass fiber braided tube.

7. The air brick with temperature monitoring warning of claim 1, wherein, The air pipe is provided with a plurality of air pipes, and the plurality of air pipes are distributed in parallel and spaced apart in the air brick body.

8. The air brick with temperature monitoring warning according to claim 7, characterized in that, The plurality of air pipes are circumferentially spaced apart about the central axis of the air brick body, and the air inlet pipe is arranged on the central axis of the air brick body.

9. The air brick with temperature monitoring warning of claim 7, wherein, The air pipe is an air-permeable steel pipe, and the diameter of the air-permeable steel pipe is less than or equal to 3mm.

10. The air brick with temperature monitoring warning of claim 1, wherein, The thermocouple probe is a platinum-rhodium 13-platinum type thermocouple probe.

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