Blast furnace thermocouple complementary planting tool

Abstract

The utility model relates to a blast furnace thermocouple complementary planting tool, comprising a thermocouple fixing seat comprising an outer cylinder and an inner sleeve; the outer cylinder penetrates through the side wall of the blast furnace body; a through hole for the thermocouple to penetrate through is formed in the center of the inner sleeve; the thermocouple fixing seat, the blast furnace body and the thermocouple are jointly enclosed to form a cavity for circulation of blast furnace refractory slurry; the grouting opening is formed in the inner sleeve at the lower end of the thermocouple fixing seat and is used for grouting into the cavity; and the slurry outlet is formed in the outer cylinder at the upper end of the thermocouple fixing seat. A grouting opening is formed in an inner sleeve of a thermocouple fixing seat, a slurry outlet is formed in an outer cylinder, the slurry outlet is formed above the grouting opening, and slurry is pressed into a cavity which is formed by the thermocouple fixing seat, a blast furnace body and a thermocouple in an enclosing mode and used for circulation of blast furnace refractory slurry through the grouting opening; therefore, the gas in the furnace body is prevented from flowing out, and the smelting safety of the blast furnace is improved.

Description

Technical Field

[0001] This utility model relates to the field of blast furnace thermocouple replanting technology, and in particular to a blast furnace thermocouple replanting tool. Background Technology

[0002] The blast furnace hearth and surrounding area are entirely lined with refractory materials and cooling walls. Normally, the cooling walls are circulated with water to ensure safe smelting inside the blast furnace. To monitor the degree of refractory erosion, numerous thermocouples are installed on the upper and lower parts of the blast furnace hearth and body to detect the temperature of the refractory material, determining the extent of burn-off and erosion. This allows for adjustments to the smelting intensity, ensuring the safe operation of the blast furnace.

[0003] During blast furnace operation, the expansion of the refractory materials inside the furnace body and the vertical movement of the furnace charge frequently cause thermocouples to break or burn due to stress. Damage to thermocouples in the furnace body or hearth can leave the blast furnace foreman without a method of judgment, affecting blast furnace operation and smelting safety control. To improve blast furnace smelting safety, specific requirements have been put forward regarding the condition of thermocouples in the blast furnace hearth and furnace body, as well as erosion models of the blast furnace hearth. Therefore, damaged blast furnace thermocouples must be replaced and installed promptly.

[0004] In the existing technology, the conventional method for reinstalling thermocouples in blast furnaces is as follows: First, check the blast furnace construction drawings to understand the refractory material of this part of the blast furnace and determine the location and depth of the opening. After the blast furnace is shut down, cut a hole in the blast furnace shell that is 2-3mm larger than the size of the thermocouple mounting sleeve. Then, use an electric hammer to drill a hole in the refractory material of the blast furnace body that is about 50mm deeper than the length of the thermocouple. After that, install the thermocouple in the newly drilled hole and weld the thermocouple's movable sleeve to the furnace shell, which completes the installation.

[0005] However, after drilling the thermocouple mounting holes with an electric hammer, the impact of the hammer can cause the refractory material around the holes to loosen or be damaged. Since the blast furnace is a high-temperature and high-pressure environment, the gas will leak along the newly drilled thermocouple holes. Because the gap between the mounting hole and the thermocouple cannot be filled, the gas leaks around, causing the furnace shell to turn red or the temperature around the thermocouple to become too high, creating new hidden dangers for the blast furnace. Utility Model Content

[0006] The purpose of this invention is to provide a blast furnace thermocouple replanting tool that solves the problems of stability and safety in blast furnace thermocouple replanting in the prior art.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] This utility model provides a blast furnace thermocouple reinstallation fixture, including: a thermocouple fixing seat, the thermocouple fixing seat including an outer cylinder and an inner sleeve; the outer cylinder is inserted into the side wall of the blast furnace body, and the inner sleeve has a through hole formed in the center for the thermocouple to pass through; the thermocouple fixing seat, the blast furnace body and the thermocouple together form a cavity, the cavity being used for the flow of blast furnace refractory slurry;

[0009] A grouting port is provided on the inner sleeve located at the lower end of the thermocouple mounting base to press grout into the cavity;

[0010] The slurry outlet is located on the outer cylinder at the upper end of the thermocouple mounting base.

[0011] Furthermore, the thermocouple holder is used for detachably connecting the thermocouple, and the thermocouple holder has a structure for detachably connecting the thermocouple.

[0012] Furthermore, the inner wall of the end of the thermocouple holder is provided with threads, which are used for detachable connection with the thermocouple.

[0013] Furthermore, a flange is provided at the thermocouple mounting base, and the flange is used for detachable connection with the thermocouple.

[0014] Furthermore, the thermocouple mounting base is at least partially exposed outside the blast furnace body.

[0015] Furthermore, the lateral length of the thermocouple holder is 20-30 cm shorter than the total length of the thermocouple.

[0016] Furthermore, the cavity includes a first channel and a second channel, the first channel being formed by the inner sleeve and the thermocouple, and the second channel being formed by the outer cylinder and the blast furnace body, and the first channel and the second channel are in communication.

[0017] Furthermore, the diameter of the first channel and the second channel is 1.5~2mm.

[0018] Furthermore, the length of the first channel is greater than the length of the second channel.

[0019] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0020] This utility model discloses a blast furnace thermocouple replanting fixture. By opening a grouting port on the inner sleeve of the thermocouple mounting base and a grout outlet on the outer cylinder of the thermocouple mounting base, and positioning the grout outlet above the grouting port, grout is injected into the cavity formed by the thermocouple mounting base, the blast furnace body, and the thermocouple, allowing the blast furnace refractory grout to flow. When the grout overflows from the grout outlet, the cavity is filled with grout, thereby cutting off the escape of gas from the furnace body without damaging the furnace materials inside the blast furnace body, thus improving the safety of blast furnace smelting. Attached Figure Description

[0021] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0022] Figure 1 This is a cross-sectional schematic diagram of a blast furnace thermocouple replanting tool provided by this utility model;

[0023] Figure 2 This is a schematic diagram of the thermocouple provided by this utility model;

[0024] Figure 3 This is a cross-sectional schematic diagram of the blast furnace thermocouple replanting tool and thermocouple combined operation provided by this utility model;

[0025] The reference numerals in the attached figures are explained as follows:

[0026] 1. Thermocouple mounting base; 101. Outer cylinder; 102. Inner sleeve; 2. Blast furnace body; 3. Thermocouple; 4. Cavity; 401. First channel; 402. Second channel; 5. Grouting port; 6. Grout outlet. Detailed Implementation

[0027] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] See Figures 1 to 3 The blast furnace thermocouple replanting tool provided by this utility model includes a thermocouple fixing base 1, a grouting port 5 and a grout outlet 6.

[0029] Specifically, the thermocouple mounting base 1 includes an outer cylinder 101 and an inner sleeve 102. The outer cylinder 101 passes through the side wall of the blast furnace body 2. That is, when installing the thermocouple mounting base 1, an installation hole needs to be opened in the side wall of the blast furnace body in advance for the thermocouple mounting base 1 to pass through. The inner sleeve 102 is simultaneously formed with a through hole for the thermocouple 3 to pass through. In fact, the thermocouple mounting base 1 is connected to the blast furnace body through its outer cylinder 101, and the thermocouple 3 passes through the inner sleeve 102 of the thermocouple mounting base 1, so that the thermocouple mounting base 1, the blast furnace body 2, and the thermocouple 3 together enclose a cavity 4. This cavity 4 is used for the flow of blast furnace refractory slurry.

[0030] The thermocouple 3 and the thermocouple mounting base 1 are detachably connected. Specifically, in this embodiment of the invention, an internal thread is provided on the inner wall of the end of the thermocouple mounting base 1, and an external thread is provided on the outer wall of the thermocouple 3. The thermocouple 3 is fastened to the thermocouple mounting base 1 by the threaded connection between the internal and external threads. Of course, a flange can also be used to connect the thermocouple 3 and the thermocouple mounting base 1. Other connection methods that can securely connect the thermocouple 3 and the thermocouple mounting base 1 should be covered within the scope of protection of this invention, as long as there are no gaps at the connection between the thermocouple 3 and the thermocouple mounting base 1, and the two can be stably connected.

[0031] Furthermore, in this embodiment of the invention, the total length of the thermocouple holder 1 is set to be 20-30 cm shorter than the length of the thermocouple 3. This ensures that after the thermocouple 3 is installed on the fixture, the head of the thermocouple 3 can extend 20-30 mm beyond the inner sleeve 102, thus ensuring that the thermocouple can measure temperature normally. Of course, the length of the thermocouple holder 1 can be adjusted according to the length of the thermocouple 3, as long as it ensures that the thermocouple 3 can measure temperature accurately.

[0032] To address the issue of how to introduce the aforementioned blast furnace refractory slurry into the cavity 4, in this embodiment of the invention, a grouting port 5 is provided on the inner sleeve 102 located at the lower end of the thermocouple mounting base 1. An external grouting machine is used to press the slurry into the grouting port 5, allowing the slurry to enter the cavity 4. Simultaneously, a slurry outlet 6 is provided on the outer cylinder 101 at the upper end of the thermocouple mounting base 1 for the blast furnace refractory slurry to flow out. When the blast furnace refractory slurry overflows from the outlet 6, it indicates that the cavity 4 is filled with slurry; that is, the gaps between the thermocouple mounting base 1, the blast furnace body 2, and the thermocouple 3 are all filled. This prevents the gas in the furnace body from leaking into the external environment through the mounting holes on the side wall of the furnace body, thus ensuring operational safety.

[0033] In order to ensure that the grouting port 5 and the grouting outlet 6 can be installed in place, in this embodiment of the utility model, the thermocouple fixing seat 1 is at least partially exposed in the blast furnace body 2, that is, an appropriate distance is left between the grouting port 5 and the grouting outlet 6 and the blast furnace body 2.

[0034] Additionally, it should be noted that the grouting port 5 is located at the lower end of the thermocouple mounting base 1, while the grout outlet 6 is located at the upper end of the thermocouple mounting base 1, thus adhering to the principle of grout entering from the bottom and exiting from the top. If the grout enters from the top and exits from the bottom, it will only concentrate at the lower end of the cavity 4 due to gravity, and the air inside the cavity cannot be completely expelled, so the grout cannot completely fill the cavity 4.

[0035] The cavity 4 mentioned above essentially includes a first channel 401 and a second channel 402. The first channel 401 is formed by the inner sleeve 102 and the thermocouple 2, while the second channel 402 is formed by the outer cylinder 101 and the blast furnace body 2, and the first channel 401 and the second channel 402 are interconnected.

[0036] The aforementioned grouting port 5 connects to the first channel 401, and the grout outlet 6 connects to the second channel 402. Grout is injected into the first channel 401 through the grouting port 5. The grout flows from the first channel 401 along the periphery of the thermocouple 3 towards the insertion direction of the thermocouple 3 into the blast furnace. After flowing out of the first channel 401, it fills the cavity gaps around the head of the thermocouple 3. After filling, under pressure, it flows in the opposite direction, filling the gaps outside the first channel 401, and then flows outward along the second channel 402, finally flowing out of the grout outlet 6. As long as there is grout flowing out of the grout outlet 6, it indicates that the periphery of the thermocouple 3 has been filled. Finally, the grouting port 5 and the grout outlet 6 are sealed with end caps.

[0037] The diameter of the first channel 401 and the second channel 402 is 1.5~2mm, and the specific diameter can be adjusted reasonably as needed. Furthermore, in this embodiment of the invention, the length of the first channel 401 is set to be greater than the length of the second channel 402, so that the slurry outlet 6 can extend into the interior of the blast furnace body 2.

[0038] During installation, first determine the total length of the thermocouple 3 to be installed and the insertion depth within the blast furnace body 2 according to the drawings. Then, determine the length of the thermocouple mounting base 1 and the outer diameter of the tooling based on the total length of the thermocouple 3 and the insertion depth within the blast furnace body 2. After the blast furnace is shut down, determine the location of the installed thermocouple according to the drawings. Determine the opening size in the furnace lining based on the outer diameter of the thermocouple mounting base 1, and cut open the furnace lining. Use an electric hammer to drill a hole in the refractory material inside the blast furnace; the hole size should be slightly larger than the outer diameter of the thermocouple mounting base 1.

[0039] Next, insert thermocouple holder 1 into the thermocouple holder mounting hole, ensuring that the grout outlet 6 faces upward and the grouting outlet 5 faces downward to ensure the best grouting effect. Weld the furnace shell to the thermocouple holder 1 to seal it properly, ensuring there are no leaks. Then, insert thermocouple 3 into the thermocouple holder 1, so that the thermocouple holder 1 and thermocouple 3 are firmly secured in place, ensuring a good seal.

[0040] Then, remove the caps from the grouting port 5 and the grout outlet 6, and press grout inward from the grouting port 5. The grout of the same material as the blast furnace refractory is forcibly pressed into the first channel 401 by the grouting machine. The grout will flow from the first channel 401 along the periphery of the thermocouple 3 into the blast furnace in the insertion direction. After flowing out of the first channel 401, it will fill the gap around the head of the thermocouple 3. After filling, it will flow in the opposite direction under pressure to fill the gap outside the first channel 401, and then flow outward along the second channel 402 and out of the grout outlet 6. As long as there is grout flowing out of the grout outlet 6, it indicates that the periphery of the thermocouple 3 has been filled. First, seal the first channel 401, apply pressure to ensure that the periphery of the refractory is filled, and finally seal the first channel 401 and the second channel 402 with caps.

[0041] In summary, this utility model discloses a blast furnace thermocouple replanting fixture. It features a grouting port on the inner sleeve of the thermocouple mounting base and a grout outlet on the outer cylinder of the thermocouple mounting base, with the outlet positioned above the grouting port. Grouting follows a bottom-in, top-out principle. Grout is injected through the grouting port into the cavity formed by the thermocouple mounting base, the blast furnace body, and the thermocouple, allowing the refractory grout to flow. When the grout overflows from the outlet, the cavity is filled with grout, effectively preventing gas leakage from the furnace body without damaging the furnace materials, thus improving blast furnace smelting safety.

[0042] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the protection scope of this utility model.

Claims

1. A work tool for a hot-iron insertion of a blast furnace, characterized in that, The utility model relates to a hot-wire fixing seat for blast furnace, which comprises a hot-wire fixing seat (1) including an outer cylinder (101) and an inner sleeve (102), the outer cylinder (101) is arranged on the sidewall of a blast furnace body (2), the inner sleeve (102) is centrally formed with a through hole for the hot-wire to pass through, the hot-wire fixing seat (1), the blast furnace body (2) and the hot-wire jointly form a cavity (4) for the blast furnace refractory slurry to flow through, a grouting port (5) is arranged on the inner sleeve (102) at the lower end of the hot-wire fixing seat (1) to pressurize the cavity, and a slurry outlet (6) is arranged on the outer cylinder (101) at the upper end of the hot-wire fixing seat (1). The hot-wire fixing seat (1) is provided with a structure for detachably connecting the hot-wire. The end inner wall of the hot-wire fixing seat (1) is provided with a thread for detachably connecting the hot-wire. The hot-wire fixing seat (1) is provided with a flange for detachably connecting the hot-wire.

2. The high-temperature thermocouple repositioning tool of claim 1, wherein: The hot-wire fixing seat (1) is at least partially exposed to the blast furnace body (2).

3. The high-temperature thermocouple repositioning tool of claim 2, wherein: The transverse length of the hot-wire fixing seat (1) is 20-30 cm shorter than the total length of the hot-wire.

4. The high-temperature thermocouple repositioning tool of claim 2, wherein: The cavity (4) comprises a first channel (401) and a second channel (402), the first channel (401) is formed by the inner sleeve (102) and the hot-wire, the second channel (402) is formed by the outer cylinder (101) and the blast furnace body (2), and the first channel (401) and the second channel (402) are through.

5. The high-temperature thermocouple repositioning tool of claim 1, wherein: The aperture of the first channel (401) and the second channel (402) is 1.5-2 mm.

6. The high-temperature thermocouple repositioning tool of claim 1, wherein: The length of the first channel (401) is greater than the length of the second channel (402).

7. The high-temperature thermocouple repositioning tool of claim 1, wherein: ​ 8. The high-temperature thermocouple repositioning tool of claim 7, wherein: ​ 9. The high-temperature thermocouple repositioning tool of claim 8, wherein, ​

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