Blast furnace cooling wall mounting bolt with temperature measuring device and blast furnace cooling wall mounting structure

Abstract

The application provides a blast furnace cooling wall mounting bolt with a temperature measuring device and a blast furnace cooling wall mounting structure, and relates to the technical field of blast furnace cooling walls.The blast furnace cooling wall mounting bolt with the temperature measuring device comprises a bolt main body, a pre-drilled hole is axially arranged on the bolt main body, one end of the pre-drilled hole is open to the end face of the bolt main body to form an open end, and the other end is closed to form a closed end; a temperature measuring assembly is inserted into the pre-drilled hole from the open end; a stress compensation structure comprises a sealing compensation structure and a deformation adaptation assembly, the sealing compensation structure is sleeved on the outer side of the bolt main body close to the open end, is used for sealing connection with a furnace shell and compensates for the difference in thermal expansion deformation between the bolt main body and the furnace shell, and the deformation adaptation assembly is embedded on the outer wall of the middle segment of the bolt main body and is used for buffering or monitoring the deformation of the bolt main body. The blast furnace cooling wall mounting bolt with the temperature measuring device is used for fixing the cooling wall on the furnace shell of the blast furnace, does not damage the strength of the cooling wall and can monitor the temperature of the cooling wall.

Description

Technical Field

[0001] This invention relates to the field of blast furnace cooling wall technology, and particularly to a blast furnace cooling wall mounting bolt with a temperature measuring device and a blast furnace cooling wall mounting structure. Background Technology

[0002] The blast furnace cooling wall is a core piece of equipment that ensures the structural safety of the furnace body and delays the erosion of the inner lining. It is fixed to the furnace shell of the blast furnace by installation bolts and is in a high-temperature working environment of more than 1000°C for a long time, and is subjected to slag erosion and thermal stress impact.

[0003] The thermal state of the cooling wall directly determines the blast furnace's lifespan and production safety. If localized overheating is not detected in time, it can easily lead to cracks in the cooling wall, burn-through of water pipes, and even catastrophic accidents such as hearth burn-through. Therefore, it is necessary to monitor the temperature of the cooling wall in real time to avoid localized overheating and ensure the safe operation of the blast furnace.

[0004] In existing technologies, such as Figure 1 As shown, the cooling wall 21 is mounted on the blast furnace shell by multiple mounting bolts 22. A temperature measuring device 23 is also installed on the wall 21 to monitor the temperature of the cooling wall in real time. The temperature measuring device includes a temperature measuring sleeve cast inside the wall 21 and a thermocouple, with the thermocouple inserted into the temperature measuring sleeve to monitor the temperature of the cooling wall body in real time. This cooling wall temperature measuring structure, due to the presence of a "steel-other material (cast iron / steel / copper)" interface, is prone to defects such as insufficient bonding during manufacturing or application, which can easily compromise the overall structural strength of the cooling wall. Furthermore, in this structure, due to limitations in the casting process, to avoid casting stress concentration and ensure the uniformity of molten iron flow, the bolts and temperature measuring points cannot be positioned close enough to directly reflect localized thermal stress concentration at the bolt connections.

[0005] In view of this, based on years of experience in production and design in this and related fields, the inventor has designed a blast furnace cooling wall mounting bolt with a temperature measuring device and a blast furnace cooling wall mounting structure through repeated experiments, in order to solve the problems existing in the prior art. Summary of the Invention

[0006] The purpose of this invention is to provide a blast furnace cooling wall mounting bolt with a temperature measuring device and a blast furnace cooling wall mounting structure, which also has a temperature detection function, and can monitor the temperature of the cooling wall without damaging the strength of the cooling wall.

[0007] To achieve the above objectives, the present invention proposes a blast furnace cooling wall mounting bolt with a temperature measuring device for fixing the cooling wall to the furnace shell of the blast furnace, wherein the blast furnace cooling wall mounting bolt with a temperature measuring device comprises: The bolt body has an axially opened pre-drilled channel, one end of which opens at the end face of the bolt body to form an open end, and the other end is closed to form a closed end; The temperature measuring component is inserted into the pre-drilled channel from the open end; The stress compensation structure includes a sealing compensation structure and a deformation adaptation component. The sealing compensation structure is sleeved on the outer side of the bolt body near the open end, and is used to seal the connection with the furnace shell and compensate for the difference in thermal expansion deformation between the bolt body and the furnace shell. The deformation adaptation component is embedded on the outer wall of the middle section of the bolt body, and is used to buffer or monitor the deformation of the bolt body.

[0008] The present invention also proposes a blast furnace cooling wall mounting structure, including a cooling wall, a furnace shell and a plurality of mounting bolts, wherein at least one of the mounting bolts is the blast furnace cooling wall mounting bolt with temperature measuring device as described in claim 1; the mounting bolt with temperature measuring device passes through the cooling wall and the furnace shell and fixes the cooling wall to the furnace shell.

[0009] Compared with the prior art, the present invention has the following features and advantages: The blast furnace cooling wall mounting bolt and blast furnace cooling wall mounting structure proposed in this invention integrate the temperature measuring device directly into the mounting bolt without weakening the bolt strength. This eliminates the need for additional temperature measuring holes in the cooling wall body, avoids weakening the cooling wall structure strength, and solves the spatial compatibility problem between temperature measurement and fastening. The blast furnace cooling wall mounting bolt can reflect the temperature of the cooling wall and the vicinity of the furnace shell in real time, which is convenient for monitoring the thermal state of the blast furnace.

[0010] The blast furnace cooling wall mounting bolt with temperature measuring device proposed in this invention has a stress compensation structure on the bolt body. The sealing compensation structure of this stress compensation structure absorbs the difference in axial thermal expansion between the bolt body, the temperature measuring component, and the furnace shell, maintaining stable sealing performance; the deformation adaptation component of this stress compensation structure buffers or monitors the bending or tensile deformation of the bolt body under thermal stress. Attached Figure Description

[0011] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, guided by the teachings of this invention, can select various possible shapes and proportions to implement the invention according to specific circumstances.

[0012] Figure 1 A schematic diagram of the structure for mounting bolts on an existing cooling wall; Figure 2This is a schematic diagram of an embodiment of the blast furnace cooling wall mounting bolts proposed in this invention; Figure 3 This is a schematic diagram of another embodiment of the blast furnace cooling wall mounting bolts proposed in this invention.

[0013] Explanation of reference numerals in the attached figures: 100. Blast furnace cooling wall mounting bolts; 1. Bolt body; 2. Pre-drilled hole; 3. Temperature measuring component; 31. Thermocouple; 32. Outer sleeve; 4. Corrugated compensator; 5. Sealing gasket; 6. Sealing compensation sleeve; 7. Gasket; 8. Deformation adapter component; 9. Mounting nut; 200. Cooling wall; 300. Furnace shell; 21. Wall body; 22. Mounting bolts; 23. Temperature measuring device. Detailed Implementation

[0014] The details of the present invention can be more clearly understood by referring to the accompanying drawings and the description of specific embodiments. However, the specific embodiments of the present invention described herein are for illustrative purposes only and should not be construed as limiting the invention in any way. Under the teachings of this invention, those skilled in the art can conceive of any possible modifications based on the invention, and these should all be considered to fall within the scope of the invention.

[0015] like Figure 2 , Figure 3 As shown, the present invention provides a blast furnace cooling wall mounting bolt 100 with a temperature measuring device for fixing a cooling wall 200 to the furnace shell 300 of a blast furnace. The blast furnace cooling wall mounting bolt 100 includes a bolt body 1, a temperature measuring component 3, and a stress compensation structure. The bolt body 1 has a pre-drilled channel 2 extending axially along the bolt body 1. One end of the pre-drilled channel 2 opens onto the end face of the bolt body 1 near the furnace shell 300, forming an open end, while the other end is closed inside the bolt body 1, forming a closed end. The temperature measuring component 3 is inserted into the pre-drilled channel 2 through the open end. The stress compensation structure includes a sealing compensation structure and a deformation adaptation component 8. The sealing compensation structure is sleeved on the outer side of the bolt body 1 near the open end, used for sealing connection with the furnace shell 300 and compensating for the difference in thermal expansion deformation between the bolt body 1 and the furnace shell 300. The deformation adaptation component 8 is embedded in the outer wall of the middle section of the bolt body 1, used for buffering or monitoring the deformation of the bolt body 1.

[0016] The present invention also proposes a blast furnace cooling wall mounting structure, including a cooling wall 200, a blast furnace shell 300 and at least a plurality of mounting bolts, at least one of which is a blast furnace cooling wall mounting bolt 100 as described above. The blast furnace cooling wall mounting bolt 100 passes through the cooling wall 200 and the furnace shell 300 and fixes the cooling wall 200 to the furnace shell 300.

[0017] The blast furnace cooling wall mounting bolt 100 with temperature measuring device and the blast furnace cooling wall mounting structure proposed in this invention integrate the temperature measuring device directly into the mounting bolt without weakening the bolt strength. This eliminates the need for additional temperature measuring holes in the cooling wall body, avoids weakening the cooling wall structure strength, and solves the spatial compatibility problem between temperature measurement and fastening. The blast furnace cooling wall mounting bolt 100 can reflect the temperature of the cooling wall 200 and the vicinity of the furnace shell 300 in real time, which is convenient for monitoring the thermal state of the blast furnace.

[0018] The blast furnace cooling wall mounting bolt 100 with a temperature measuring device proposed in this invention has a stress compensation structure on the bolt body 1. The sealing compensation structure of this stress compensation structure absorbs the difference in axial thermal expansion between the bolt body 1, the temperature measuring component 3, and the furnace shell 300, maintaining stable sealing performance; the deformation adaptation component 8 of this stress compensation structure buffers or monitors the bending or tensile deformation of the bolt body 1 under thermal stress.

[0019] In an optional embodiment of the present invention, each cooling wall 200 is fixed by four or more mounting bolts to ensure that each cooling wall 200 has one or more blast furnace cooling wall mounting bolts 100 and at least three conventional bolts, so as to ensure that even if the blast furnace cooling wall mounting bolts 100 are damaged due to external forces or other uncontrollable factors, the reliability of the tight fixing position of the cooling wall 200 can still be maintained.

[0020] Furthermore, the external dimensions of the blast furnace cooling wall mounting bolts 100 are consistent with those of conventional bolts, and they can directly replace existing bolts without requiring structural modifications to the cooling wall 200 and the furnace shell 300.

[0021] In an optional embodiment of the present invention, the deformation adapter component 8 is an elastic buffer, and an annular groove is provided on the outer wall of the middle section (i.e. the stud part) of the bolt body 1, and the elastic buffer is embedded in the annular groove.

[0022] The stud portion of the bolt body 1 is the stress concentration area of ​​the bolt body 1. An elastic buffer is embedded in this stress concentration area. When the bolt body 1 undergoes plastic deformation or even fracture, the elastic buffer can play a protective and anti-deformation role, preventing the bolt body 1 from undergoing further deformation.

[0023] In an optional example of this implementation, the elastic buffer is a spring, with the spring portion embedded in an annular groove.

[0024] Furthermore, the depth of the annular groove is 3mm, which means the spring is embedded in the bolt body 1 to a depth of 3mm, and does not have a significant impact on the strength of the bolt body 1.

[0025] In another optional embodiment of the present invention, the deformation adapter component 8 is a flexible conductive circuit or a surface acoustic wave resonator, and an annular groove is provided on the outer wall of the middle section of the bolt body 1, and the flexible conductive circuit or surface acoustic wave resonator is embedded in the annular groove.

[0026] When the bolt body undergoes plastic deformation, the resistance of the flexible conductive circuit changes linearly with the deformation; if it breaks, the flexible conductive circuit is instantly disconnected.

[0027] Furthermore, by reading deformation values ​​through built-in RFID or wireless means, mechanical life detection and temperature measurement functions are integrated to achieve three-in-one monitoring of the bolt body 1's "temperature-stress-life".

[0028] It should be noted that when the deformation adapter component 8 uses a SAW resonator (surface acoustic wave resonator), its working principle is similar to that of a flexible conductive circuit. It detects stress changes through surface acoustic wave technology, but it has higher sensitivity, stronger anti-interference ability, and is suitable for harsher working environments.

[0029] In an optional embodiment of the present invention, such as Figure 3 As shown, the sealing compensation structure includes a bellows compensator 4. One end of the bellows compensator 4 is sealed and fixedly connected to the outer wall of the furnace shell 300, and the other end of the bellows compensator 4 is sealed and fixedly connected to the outer wall of the temperature measuring component 3. The bellows compensator presses the temperature measuring component 3 tightly onto the bolt body 1. The bellows compensator 4 can compensate for the thermal expansion differences between the furnace shell 300, the bolt body 1, and the temperature measuring component 3, preventing the bolt body 1 from being damaged due to thermal stress concentration, and ensuring structural stability and temperature measurement reliability under high-temperature conditions.

[0030] In an optional example of this embodiment, the corrugated compensator 4 is sealed and fixedly connected to the outer wall of the furnace shell 300 by welding. The welding position is located on the outside of the furnace shell 300, and the weld is continuous and has good sealing performance.

[0031] In another optional embodiment of the invention, such as Figure 2 As shown, the sealing compensation structure includes a sealing compensation sleeve 6. One end of the sealing compensation sleeve 6 is sealed and fixedly connected to the outer wall of the furnace shell 300, and the other end of the sealing compensation sleeve 6 is sealed and fixedly connected to the outer wall of the temperature measuring component 3.

[0032] In an optional embodiment of the present invention, the sealing compensation structure further includes a sealing washer 5, which is sleeved on the outside of the bolt body 1 and seals with the bolt body 1. The sealing washer 5 is located between the furnace shell 300 and the cooling wall 200. When the furnace shell 300 and the cooling wall 200 are fixedly connected together by the bolt body 1, the sealing washer 5 is deformed under pressure and fits tightly against the furnace shell 300 and the cooling wall 200 to form a sealing surface.

[0033] In an optional example, the cooling wall 200 is provided with a boss that mates with the sealing gasket 5, which is positioned between the boss of the cooling wall 200 and the furnace shell 300. The sealing gasket 5 and the sealing compensation structure form a double sealing structure, effectively preventing leakage of coal gas, high-temperature flue gas, and cooling water.

[0034] In one alternative example, the sealing gasket is made of flexible graphite, ceramic, and composite rubber, which can adapt to the harsh working environment of blast furnaces with high temperature, high pressure, and high vibration, thus extending its service life.

[0035] In an optional embodiment of the present invention, the temperature measuring component 3 includes a thermocouple 31, an outer sleeve 32, an operating box, and a signal output module. The operating box is sealed to one end of the outer sleeve 32, the signal output module is located inside the operating box, the other end of the outer sleeve 32 is sealed through a sealing compensation structure, the thermocouple 31 passes through the outer sleeve 32, one end of the thermocouple 31 extends into the operating box and is connected to the signal output module, and the other end of the thermocouple 31 extends into the pre-opened channel 2.

[0036] In an optional example of this implementation, the thermocouple 31 is in contact with the inner wall of the bolt body 1. The bolt body 1 acts as a heat conduction medium, transferring the temperature of the fixed point of the cooling wall 200 to the thermocouple 31, thereby realizing real-time monitoring of the temperature of the bolt fixing point.

[0037] In an alternative example, thermocouple 31 is an armored thermocouple or other form of thermocouple.

[0038] In an optional example of this implementation, the signal output module adopts an aviation plug design, which facilitates the replacement and maintenance of the temperature measurement component 3 and reduces operation and maintenance costs.

[0039] In an optional example of this implementation, the temperature measuring component 3 also includes a cable connected to the thermocouple 31.

[0040] In an optional embodiment of the present invention, the bolt body 1 is cylindrical and has an external thread on the outer side near the open end for threaded connection to the cooling wall 200 and the furnace shell 300.

[0041] In an optional embodiment of the present invention, the inner diameter of the pre-drilled channel 2 is adapted to the outer diameter of the thermocouple 31.

[0042] In one optional example of this implementation, the inner diameter of the pre-drilled channel 2 is 6 mm, and the outer diameter of the thermocouple is designed to match the inner diameter of the pre-drilled channel, ensuring that the thermocouple 31 can be smoothly inserted into the axial channel and maintain good thermal conductivity contact with the bolt body 1, thereby improving the temperature measurement accuracy.

[0043] In an optional embodiment of the present invention, the minimum specification of the bolt body 1 is M42, the strength grade of the bolt body 1 is 8.8, and the length of the bolt body 1 is determined according to the design requirements of the cooling wall.

[0044] In an optional embodiment of the present invention, the bolt body 1 is a double-ended bolt or a common structural bolt, as determined according to the design requirements of the cooling wall 200.

[0045] In an optional example of this embodiment, the bolt body 1 is a single-headed bolt, which is installed in conjunction with a mounting nut and a washer. The bolt body 1 sequentially passes through the cooling wall 200, the furnace shell 300, the washer 7 and the mounting nut 9. The bolt body 1 is threadedly connected to the mounting nut 9 to fix the cooling wall 200 and the furnace shell 300 together.

[0046] In an optional embodiment of the present invention, the material of the cooling wall 200 includes cast iron, steel, copper, etc.

[0047] The blast furnace cooling wall mounting bolt 100 with temperature measuring device and the blast furnace cooling wall mounting structure proposed in this invention solve the problems of existing technologies, such as cooling wall bolts only having fastening and positioning functions, lack of temperature monitoring at the bolt location, and temperature measuring structure damaging the strength of the cooling wall. It realizes the integration of fastening and temperature measurement, accurate thermal monitoring of fixed points, and coordinated adaptation between the mounting structure and the cooling wall, ensuring the long-term safe and stable operation of the blast furnace cooling wall.

[0048] The detailed explanations of the above embodiments are intended only to explain the present invention so as to facilitate a better understanding of the present invention. However, these descriptions should not be construed as limiting the present invention for any reason. In particular, the various features described in different embodiments can be arbitrarily combined with each other to form other embodiments. Unless there is an explicit description to the contrary, these features should be understood to be applicable to any embodiment, and not limited to the described embodiments.

Claims

1. A blast furnace stave cooler mounting bolt with a temperature measuring device for fixing a stave cooler to a furnace shell of a blast furnace, characterized in that, The mounting bolts for the blast furnace cooling wall with temperature measuring device include: The bolt body has an axially opened pre-drilled channel, one end of which opens at the end face of the bolt body to form an open end, and the other end is closed to form a closed end; The temperature measuring component is inserted into the pre-drilled channel from the open end; The stress compensation structure includes a sealing compensation structure and a deformation adaptation component. The sealing compensation structure is sleeved on the outer side of the bolt body near the open end, and is used to seal the connection with the furnace shell and compensate for the difference in thermal expansion deformation between the bolt body and the furnace shell. The deformation adaptation component is embedded on the outer wall of the middle section of the bolt body, and is used to buffer or monitor the deformation of the bolt body.

2. The blast furnace cooling wall mounting bolt with temperature measuring device as described in claim 1, characterized in that, The deformation adapter component is an elastic buffer, and an annular groove is provided on the outer wall of the middle section of the bolt body, and the elastic buffer is embedded in the annular groove.

3. The blast furnace cooling wall mounting bolt with temperature measuring device as described in claim 2, characterized in that, The elastic buffer is a spring, which is partially embedded in the annular groove.

4. The blast furnace cooling wall mounting bolt with temperature measuring device as described in claim 1, characterized in that, The deformation adapter component is a flexible conductive circuit or a surface acoustic wave resonator. An annular groove is formed on the outer wall of the middle section of the bolt body, and the flexible conductive circuit or the surface acoustic wave resonator is embedded in the annular groove.

5. The blast furnace cooling wall mounting bolt with temperature measuring device as described in claim 1, characterized in that, The sealing compensation structure includes a corrugated compensator. One end of the corrugated compensator is sealed and fixedly connected to the outer wall of the furnace shell, and the other end of the corrugated compensator is sealed and fixedly connected to the outer wall of the temperature measuring component. The corrugated compensator presses the temperature measuring component onto the bolt body.

6. The blast furnace cooling wall mounting bolt with temperature measuring device as described in claim 5, characterized in that, The sealing compensation structure also includes a sealing gasket, which is sleeved on the outside of the bolt body and seals with the bolt body. The sealing gasket is located between the furnace shell and the cooling wall.

7. The blast furnace cooling wall mounting bolt with temperature measuring device as described in claim 6, characterized in that, The sealing gasket is made of flexible graphite, ceramic, or composite rubber.

8. The blast furnace cooling wall mounting bolt with temperature measuring device as described in claim 1, characterized in that, The temperature measuring assembly includes a thermocouple, an outer sleeve, an operating box, and a signal output module. The operating box is sealed to one end of the outer sleeve. The signal output module is located inside the operating box. The other end of the outer sleeve is sealed through the sealing compensation structure. The thermocouple passes through the outer sleeve. One end of the thermocouple extends into the operating box and is connected to the signal output module. The other end of the thermocouple extends into the pre-drilled channel.

9. The blast furnace cooling wall mounting bolt with temperature measuring device as described in claim 8, characterized in that, The thermocouple contacts the inner wall of the bolt body to achieve temperature measurement.

10. A blast furnace cooling wall mounting structure, comprising a cooling wall, a furnace shell, and a plurality of mounting bolts, characterized in that, At least one of the mounting bolts is the blast furnace cooling wall mounting bolt with temperature measuring device as described in claim 1; the mounting bolt with temperature measuring device passes through the cooling wall and the furnace shell, and fixes the cooling wall to the furnace shell.

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