Blind plate for blast-furnace tuyere

Abstract

The utility model discloses a blind plate for a blast furnace tuyere, which comprises a plate body, the same surface of the plate body is coated with a blister mud layer and a butter ring layer, the blister mud layer is in a circular truncated cone shape, the butter ring layer is sleeved outside the blister mud layer, the plate body is detachably clamped between a blowpipe main body and a short section, and the lower end of the plate body is connected with the short section. And the water-soaked mud layer faces one side of the short section. According to the blind plate for the blast-furnace tuyere, the surface of the plate body is coated with the blister mud layer and the butter ring layer, so that after the plate body is detachably clamped between the blowpipe main body and the short section, the blister mud layer and the butter ring layer are adhered to the short section under the clamping and pressing force, and the blister mud layer and the butter ring layer are adhered to the short section; and the closed parts of the short section and the plate body are sealed, so that the sealing performance of the blind plate for the blast-furnace tuyere is enhanced, and the leakage of gas in the short section is effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of tuyere for ironmaking blast furnaces, in particular to a blind plate for tuyere for blast furnaces. Background Art

[0002] During the long-term maintenance and shutdown of the blast furnace, if the hot blast furnace is not overhauled, the hot blast furnace cannot stop burning, and the furnace needs to be burned and kept warm, otherwise it will affect the service life of the refractory materials in the hot blast furnace, and in severe cases, it will cause the furnace body to collapse. The hot blast furnace is connected to the blast furnace tuyere blowpipe through the hot blast pipe, and serves as the blast furnace air supply device. Before the blast furnace is put into production, when the hot blast furnace is baked alone or burned and kept warm, in order to prevent the gas in the hot blast furnace from entering the blast furnace tuyere blowpipe through the hot blast pipe, and then from the blast furnace tuyere blowpipe to the blast furnace tuyere platform, causing gas leakage and causing safety accidents, the hot blast pipe needs to be blocked. When the hot blast pipe is currently blocked, a simple steel plate is often used for blocking. The steel plate is installed on the short section of the tuyere blowpipe connected to the hot blast pipe. The steel plate is in pure hard contact with the short section of the tuyere blowpipe, and the sealing effect is poor. There is still partial gas leakage, which poses a potential safety hazard. Utility Model Content

[0003] The purpose of the utility model is to provide a blind plate for a blast furnace tuyere.

[0004] The technical solution for achieving the purpose of the utility model is: a blind plate for blast furnace tuyere, installed on the tuyere blowpipe, the tuyere blowpipe includes a blowpipe body and a short section, the blowpipe body and the short section are coaxial and detachably installed;

[0005] The blind plate for blast furnace tuyere includes a plate body, and a water-soaked mud layer and a butter ring layer are coated on the same surface of the plate body, the water-soaked mud layer is in a truncated cone shape, the water-soaked mud layer has a large end and a small end, the diameter of the large end is larger than the diameter of the small end, the end face of the large end of the water-soaked mud layer is in contact with the surface of the plate body, the water-soaked mud layer is located in the middle of the plate body, the diameter of the large end of the water-soaked mud layer is larger than the transverse width of the plate body along the inner edge of the short section, and the diameter of the small end of the water-soaked mud layer is smaller than the transverse width of the plate body along the inner edge of the short section; the butter ring layer is sleeved outside the water-soaked mud layer, the inner diameter of the butter ring layer is larger than the transverse width of the plate body along the inner edge of the short section, and the outer diameter of the butter ring layer is smaller than the transverse width of the plate body along the outer edge of the short section; the plate body is detachably clamped between the blowpipe main body and the short section, and the water-soaked mud layer faces one side of the short section.

[0006] Furthermore, the butter ring layer is a multi-ring structure that is coaxial and spaced apart. The multi-ring structure of the butter ring layer can form a multi-layer seal to enhance the sealing effect.

[0007] The utility model discloses a blind plate for blast furnace tuyere, which is configured such that the plate body can be detachably clamped between the blowpipe body and the short section by coating the blister mud layer and the butter ring layer on the surface of the plate body. The blister mud layer and the butter ring layer adhere to the short section under the clamping pressure, thereby sealing the closed portion of the short section and the plate body, thereby enhancing the sealing performance of the blind plate for blast furnace tuyere and effectively preventing leakage of coal gas in the short section.

[0008] When the blister mud layer on the plate body is too thin, after the plate body is detachably clamped to the blowpipe main body and the short internode, the adhesion area between the blister mud layer and the short internode is small, and after drying, the structural strength of the blister mud layer is poor, and the sealing stability and reliability of the blister mud layer are low; when the blister mud layer on the plate body is too thick, the excessively thick blister mud layer is clamped between the plate body and the short internode, which easily causes a large gap between the plate body and the short internode, and the plate body and the short internode cannot be locked tightly, affecting the firmness of the installation. In view of the above-mentioned characteristics, the blind plate for blast furnace tuyere of the utility model is configured to have the water-bubbled mud layer in a truncated cone shape, the diameter of the large end of the water-bubbled mud layer is larger than the transverse width of the plate body along the inner edge of the short section, and the diameter of the small end of the water-bubbled mud layer is smaller than the transverse width of the plate body along the inner edge of the short section, so that when the plate body is detachably clamped between the blowpipe main body and the short section, the end face of the short section can be pressed against the inclined outer wall of the water-bubbled mud layer to achieve pressing. When the end face of the short section is pressed against the inclined outer wall of the water-blister mud layer, it is not necessary to press the entire thickness of the water-blister mud layer between the short section and the plate body, but the water-blister mud layer of the lower part is pressed between the short section and the plate body. That is to say, the water-blister mud layer pressed between the short section and the plate body is thinner, and there is no problem of "the water-blister mud layer being too thick is sandwiched between the plate body and the short section, and there is a large gap between the plate body and the short section, and the installation is not firm"; and the total thickness of the water-blister mud layer is greater than the thickness pressed between the short section and the plate body, and is not limited by the thickness pressed between the short section and the plate body. The total thickness of the water-blister mud layer is larger, the water-blister mud layer and the short section have a larger adhesion surface, the structural strength of the water-blister mud layer is also stronger after it dries, and the sealing of the water-blister mud layer has higher stability and reliability. The utility model provides a blind plate for a blast furnace tuyere. The structural arrangement of the blistered mud layer not only enables the sealing of the blistered mud layer to have higher stability and reliability, but also ensures the secure installation of the plate body and the short section.

[0009] The utility model provides a blind plate for a blast furnace tuyere. The butter ring layer is formed into a ring structure and is sleeved outside the water-blister mud layer. The water-blister mud layer forms a first seal, and the butter ring layer located outside the water-blister mud layer forms a second seal. The double-pass sealing structure formed by the water-blister mud layer and the butter ring layer can greatly improve the sealing performance and ensure the reliability of the seal. In addition, under this double-pass sealing structure, the water-blister mud layer and the butter ring layer are used. The water-blister mud layer is low-cost and easy to install, but it is relatively easy to crack after drying, and the sealing stability is relatively poor. The butter ring layer is relatively expensive and is not as easy to apply as the water-blister mud layer. However, the butter ring layer is resistant to high temperatures, has good plasticity even at high temperatures, and is not easy to crack. In view of the sealing characteristics of the blistered mud layer and the butter ring layer, the utility model is a blind plate for a blast furnace tuyere, in which the blistered mud layer is set as the first seal and the butter ring layer is set as the second seal. The stability of the first seal and the second seal is gradually increased, and the sealing layer of the entire double-sealing structure is not easily penetrated. The sealing stability is better and more secure, which can effectively prevent gas leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the installation structure of a blind plate for a blast furnace tuyere of the utility model;

[0011] Figure 2 This is a schematic diagram of the partial installation structure of the blind plate for blast furnace tuyere of the utility model;

[0012] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure of the part A in the middle;

[0013] Figure 4 This is a schematic structural diagram of a blind plate for a blast furnace tuyere according to the present invention;

[0014] Figure 5 This utility model is a blind plate edge for blast furnace tuyere Figure 4 Schematic diagram of the cross-sectional structure along the BB line. DETAILED DESCRIPTION

[0015] The preferred embodiment of the utility model blast furnace tuyere blind plate is described in detail below with reference to the accompanying drawings:

[0016] like Figures 1 to 5 As shown, a blind plate for a blast furnace tuyere is installed on a tuyere blowpipe 10. The tuyere blowpipe 10 includes a blowpipe body 101 and a short section 102. The blowpipe body 101 and the short section 102 are coaxial and detachably installed.

[0017] The blind plate for blast furnace tuyere includes a plate body 1, and a water-blister mud layer 2 and a butter ring layer 3 are coated on the same surface of the plate body 1. The water-blister mud layer 2 is in a truncated cone shape, and has a large end 21 and a small end 22. The diameter D1 of the large end 21 is larger than the diameter D2 of the small end 22. The end surface of the large end 21 of the water-blister mud layer 2 is in contact with the surface of the plate body 1. The water-blister mud layer 2 is located in the middle of the plate body 1. The diameter D1 of the large end 21 of the water-blister mud layer 2 is larger than the lateral width of the plate body along the inner edge of the short section 102. R1, the diameter D2 of the small end 22 of the mud layer with blisters 2 is smaller than the transverse width R1 of the plate body along the inner edge of the short section 102; the butter ring layer 3 is sleeved on the outside of the mud layer with blisters 2, the inner diameter D3 of the butter ring layer 3 is larger than the transverse width R1 of the plate body along the inner edge of the short section 102, and the outer diameter D4 of the butter ring layer 3 is smaller than the transverse width R2 of the plate body along the outer edge of the short section 102; the plate body 1 is detachably clamped between the blowpipe main body 101 and the short section 102, and the mud layer with blisters 2 faces the side of the short section 102.

[0018] The utility model discloses a blind plate for a blast furnace tuyere, which is installed on a tuyere blowpipe 10. In the tuyere blowpipe 10, the blowpipe body 101 is installed on the blast furnace to serve as the blast furnace tuyere. One end of the short section 102 is coaxially and detachably mounted with the blowpipe body 101. The other end of the short section 102 is connected to the hot blast furnace via a hot blast pipe. When the blast furnace is in operation, hot blast from the hot blast furnace enters the short section 102 and the blowpipe body 101 in sequence through the hot blast pipe, providing hot blast to the blast furnace.

[0019] The utility model is a blind plate for blast furnace tuyere, whose main body is the plate body 1, and the surface of the plate body 1 is coated with the blistered mud layer 2 and the butter ring layer 3, and the blistered mud layer 2 and the butter ring layer 3 are both used for the installation and sealing of the blind plate for blast furnace tuyere.

[0020] When using the blind plate for blast furnace tuyere of the present invention, the blowpipe main body 101 and the short section 102 that were originally connected are disassembled; then, the plate body 1 is horizontally placed between the blowpipe main body 101 and the short section 102, with the blister mud layer 2 and the butter ring layer 3 facing the side of the short section 102; then, the bolts are tightened to detachably clamp the plate body 1 between the blowpipe main body 101 and the short section 102, completing the installation of the plate body 1 and achieving the blocking of the tuyere blowpipe 10.

[0021] In the utility model, a blind plate for a blast furnace tuyere is installed in the process of installing the plate body 1, wherein the water-blister mud layer 2 is in a truncated cone shape, the diameter D1 of the large end 21 of the water-blister mud layer 2 is larger than the transverse width R1 of the plate body along the inner edge of the short section 102, and the diameter D2 of the small end 22 of the water-blister mud layer 2 is smaller than the transverse width R1 of the plate body along the inner edge of the short section 102. When the plate body 1 is detachably clamped between the blowpipe main body 101 and the short section 102, the end face of the short section 102 abuts against the inclined outer wall of the water-blister mud layer 2 to achieve pressing. The butter ring layer 3 is sleeved on the outside of the water-bubbled mud layer 2, the inner diameter D3 of the butter ring layer 3 is larger than the transverse width R1 of the plate body along the inner edge of the short section 102, and the outer diameter D4 of the butter ring layer 3 is smaller than the transverse width R2 of the plate body along the outer edge of the short section 102. When the plate body 1 is detachably clamped between the blowpipe body 101 and the short section 102, the butter ring layer 3 is facing the end face of the short section 102 and is pressed against the end face of the short section 102.

[0022] In the blind plate for a blast furnace tuyere of the present invention, the water-soaked mud layer 2 and the butter ring layer 3 are both made of soft materials with extremely high plasticity. During the process of clamping the plate body 1 between the blowpipe main body 101 and the short section 102, under the pressing force, the water-soaked mud layer 2 and the butter ring layer 3 are deformed and bonded to the end face of the short section 102. After the plate body 1 is clamped between the blowpipe main body 101 and the short section 102, the butter ring layer 3 is resistant to high temperatures and is not affected by the high temperature inside the hot blast pipe. However, under the influence of the high temperature inside the hot blast pipe, the water-soaked mud layer 2, which is completely in contact with the end face of the short section 102, dries up. After drying, the water-soaked mud layer 2 and the butter ring layer 3 are bonded to the end face of the short section 102, forming a seal.

[0023] The utility model relates to a blind plate for a blast furnace tuyere. By coating the blister mud layer 2 and the butter ring layer 3 on the surface of the plate body 1, the plate body 1 is detachably clamped between the blowpipe main body 101 and the short section 102. The blister mud layer 2 and the butter ring layer 3 adhere to the short section 102 under the clamping pressure, thereby sealing the closed portion of the short section 102 and the plate body 1, thereby enhancing the sealing performance of the blind plate for a blast furnace tuyere and effectively preventing leakage of coal gas in the short section 102.

[0024] When the blister mud layer 2 on the plate body 1 is too thin, after the plate body 1 is detachably clamped between the blowpipe main body 101 and the short section 102, the adhesion surface between the blister mud layer 2 and the short section 102 is small, and after drying, the structural strength of the blister mud layer 2 is poor, and the sealing stability and reliability of the blister mud layer 2 are low; when the blister mud layer 2 on the plate body 1 is too thick, the excessively thick blister mud layer 2 is clamped between the plate body 1 and the short section 102, which easily causes a large gap between the plate body 1 and the short section 102, and the plate body 1 and the short section 102 cannot be locked tightly, affecting the installation firmness. In view of the above-mentioned characteristics, the blind plate for blast furnace tuyere of the present invention is configured to have the water-bubbled mud layer 2 in a truncated cone shape, the diameter D1 of the large end 21 of the water-bubbled mud layer 2 is larger than the transverse width R1 of the plate body along the inner edge of the short section 102, and the diameter D2 of the small end 22 of the water-bubbled mud layer 2 is smaller than the transverse width R1 of the plate body along the inner edge of the short section 102, so that when the plate body 1 is detachably clamped between the blowpipe main body 101 and the short section 102, the end face of the short section 102 can be pressed against the inclined outer wall of the water-bubbled mud layer 2 to achieve pressing. When the end surface of the short section 102 is pressed against the inclined outer wall of the blister mud layer 2, it is not necessary to press the entire thickness of the blister mud layer 2 between the short section 102 and the plate body 1, but the lower part of the thickness of the blister mud layer 2 is pressed between the short section 102 and the plate body 1. In other words, the blister mud layer 2 pressed between the short section 102 and the plate body 1 is thinner, and there is no "too thick blister mud layer 2 sandwiched between the plate body 1 and the short section 102". There is a large gap between the short sections 102, and the installation is not firm. Moreover, the total thickness of the water-blistered mud layer 2 is greater than the thickness between the short section 102 and the plate body 1, and is not limited by the thickness between the short section 102 and the plate body 1. The total thickness of the water-blistered mud layer 2 is relatively large, and there is a large adhesion surface between the water-blistered mud layer 2 and the short section 102. The structural strength of the water-blistered mud layer 2 is also strong after drying, and the sealing of the water-blistered mud layer 2 has high stability and reliability. The blind plate for blast furnace tuyere of the utility model, the structural setting of the water-blistered mud layer 2 can not only make the sealing of the water-blistered mud layer 2 have high stability and reliability, but also ensure the installation firmness of the plate body 1 and the short section 102.

[0025] The utility model is a blind plate for a blast furnace tuyere. The butter ring layer 3 is an annular structure and is sleeved outside the water-blister mud layer 2. The water-blister mud layer 2 forms a first seal, and the butter ring layer 3 located outside the water-blister mud layer 2 forms a second seal. The double-pass sealing structure formed by the water-blister mud layer 2 and the butter ring layer 3 can greatly improve the sealing performance and ensure the reliability of the seal. In addition, under this double-pass sealing structure, the water-blister mud layer 2 and the butter ring layer 3 are used. The water-blister mud layer 2 is low in cost and easy to install, but it is relatively easy to crack after drying, and the sealing stability is relatively poor. The butter ring layer 3 is relatively expensive and is not as easy to apply as the water-blister mud layer 2. However, the butter ring layer 3 is resistant to high temperatures, has good plasticity even at high temperatures, and is not easy to crack. In view of the sealing characteristics of the blistered mud layer 2 and the butter ring layer 3, the utility model is a blind plate for a blast furnace tuyere, in which the blistered mud layer 2 is set as the first seal and the butter ring layer 3 is set as the second seal. The stability of the first seal and the second seal is gradually increased, and the sealing layer of the entire double-sealing structure is not easily penetrated, so the sealing stability is better and more secure, which can effectively prevent gas leakage.

[0026] The utility model is a blind plate for blast furnace tuyere, wherein the butter ring layer 3 is a multi-ring structure coaxially and spaced apart. The butter ring layer 3 of the multi-ring structure can form a multi-layer seal to enhance the sealing effect.

[0027] For ordinary technicians in the technical field to which the utility model belongs, the utility model can make several simple deductions or substitutions without departing from the concept of the utility model, which should be regarded as falling within the scope of protection of the utility model.

Claims

1. A blind plate for a blast furnace tuyere, mounted on a tuyere blowpipe, wherein the tuyere blowpipe comprises a blowpipe body and a short section, wherein the blowpipe body and the short section are coaxial and detachably mounted; characterized in that: The blister layer is a conical shape, and the blister layer has a large end and a small end, the diameter of the large end is larger than the diameter of the small end, and the end face of the large end of the blister layer is in contact with the surface of the plate body. The blister layer is located in the middle of the plate body, the diameter of the large end of the blister layer is larger than the transverse width of the plate body along the inner edge of the short section, and the diameter of the small end of the blister layer is smaller than the transverse width of the plate body along the inner edge of the short section; the butter ring layer is sleeved outside the blister layer, the inner diameter of the butter ring layer is larger than the transverse width of the plate body along the inner edge of the short section, and the outer diameter of the butter ring layer is smaller than the transverse width of the plate body along the outer edge of the short section; the plate body is detachably clamped between the blowpipe main body and the short section, and the blister layer faces one side of the short section.

2. The blind plate for blast furnace tuyere according to claim 1, characterized in that: The butter ring layer is a multi-ring structure that is coaxial and spaced apart.

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