High-temperature galvanic couple fixing structure of blast furnace hot blast stove

Abstract

The utility model discloses a high-temperature thermocouple fixing structure of a blast furnace hot blast stove, which comprises a hot blast stove main pipe, a hot blast pipe shell is arranged on the periphery of the hot blast stove main pipe, an isolation space is arranged along the circumference of the hot blast pipe shell in a protruding manner, and a mounting structure for fixing a thermocouple is arranged inside / outside the isolation space. A first sleeve structure layer is arranged in the installation structure, a second sleeve structure layer is arranged in the vertical direction of the first sleeve structure layer in a splicing mode, the first sleeve structure layer and the second sleeve structure layer are coaxially arranged, thermocouples are arranged in the first sleeve structure layer and the second sleeve structure layer, and the thermocouples are arranged in the first sleeve structure layer and the second sleeve structure layer. The thermocouple extends into the hot-blast stove main pipe, the isolation spaces on the hot-blast stove main pipe are arranged at intervals, thermocouple temperature measuring points are arranged at the positions of the isolation spaces according to different depths, the isolation spaces are of hollow structures protruding out of the hot-blast stove main pipe, and installation structures are arranged in the isolation spaces in a fixed mode.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the steel metallurgy technical field, concretely relates to a blast furnace hot blast stove high temperature thermocouple fixed structure. BACKGROUND

[0002] The hot blast stove body and hot blast pipeline design and install thermocouple, and the hot blast stove post carries out process operation according to each part temperature detection value.The hot blast stove body high temperature thermocouple damage post operator burns furnace without basis, and it is easy to cause hot blast stove refractory material burn loss.If hot blast temperature thermocouple is damaged, blast furnace hot blast temperature fluctuation causes blast furnace smelting furnace condition fluctuation to influence blast furnace smooth operation.Hot blast stove system design furnace kiln masonry reserves thermocouple installation hole, for the convenience of thermocouple installation and quick replacement thermocouple, current high temperature thermocouple is all designed as integral type flange connection.High temperature area thermocouple selection type is B or S type, and the material is platinum rhodium thermocouple wire, and the range is 0-1500 DEG C, and the price of single only is 1-50 thousand yuan, and the service life of thermocouple purchase is greater than 1 year.In actual production process, thermocouple is frequently replaced, and the reasons are analyzed as follows: (1) thermocouple product quality is poor, and service life is short. (2) refractory brick expansion expands thermocouple ceramic protective sleeve pipe. (3) thermocouple replacement causes thermocouple ceramic protective sleeve pipe damage.After thermocouple damage tracking investigation, thermocouple installation and refractory brick expansion cause thermocouple damage are main reasons.

[0003] When replacing and installing thermocouple, after construction personnel clean flange face after removing thermocouple, directly install new thermocouple, since thermocouple installation hole short pipe and flange are influenced by temperature and refractory brick expansion in the production process and produce different degrees of deformation, new thermocouple installation flange is horizontal, and short pipe flange deformation is not serious, and thermocouple pipe flange is slightly inclined, and refractory brick high temperature expansion shears thermocouple pipe and reduces the service life of thermocouple.When short pipe flange deformation is serious, thermocouple pipe is inclined and is crushed by refractory brick during flange tightening process, and thermocouple is directly damaged, and flange tightening process mouth seal pad is easy to leak air, and causes burning accident.

[0004] In view of the above factors, a blast furnace hot blast stove high temperature thermocouple fixed structure is provided to prevent damage to the thermocouple during installation and prolong the service life of the thermocouple. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a blast furnace hot blast stove high temperature thermocouple fixed structure to solve the problems in the background art.

[0006] The utility model aims at providing a blast furnace hot blast stove high temperature thermocouple fixed structure to solve the problems in the background art.

[0007] The installation structure is provided with a first sleeve structure layer, and the first sleeve structure layer is provided with a second sleeve structure layer in a splicing manner in the vertical direction, and the first sleeve structure layer and the second sleeve structure layer are coaxially arranged and provided with a thermocouple along the first sleeve structure layer and the second sleeve structure layer, the thermocouple extends into the hot blast furnace main pipe, and the insulating spaces on the hot blast furnace main pipe are arranged at intervals, and each insulating space is provided with a thermocouple temperature measuring point at different depths.

[0008] Further, the insulating space is a hollow structure protruding from the hot blast furnace main pipe, and the installation structure is fixedly arranged in the insulating space.

[0009] The installation structure is a cavity sleeve structure which is shaped according to the insulating space and is detachably connected to the support platforms on both sides of the insulating space.

[0010] The center of the installation structure is provided with a through hole which is coaxially arranged with the first sleeve structure layer and the second sleeve structure layer.

[0011] Further, the installation structure and the support platforms on both sides of the insulating space are detachably connected by bolts.

[0012] Further, the first sleeve structure layer arranged in the installation structure is an I-shaped sleeve structure, and the periphery of the first sleeve structure layer is wrapped with a high-temperature resistant layer.

[0013] The bottom edge of the first sleeve structure layer is in contact with the end face of the insulating space.

[0014] The end face of the insulating space is detachably provided with a closure cover, and the bottom edge of the first sleeve structure layer is in contact with the closure cover.

[0015] The center of the closure cover is reserved with an installation channel through which the first sleeve structure layer passes.

[0016] Further, the first sleeve structure layer and the second sleeve structure layer are detachably connected, the second sleeve structure layer is the same as the first sleeve structure layer in structure, and the height of the second sleeve structure layer is adjustable.

[0017] Further, the detachable connection between the first sleeve structure layer and the second sleeve structure layer is bolted connection.

[0018] The first sleeve structure layer extends to the outer circumference of the insulating space, and the extension distance of the first sleeve structure layer to the outer circumference of the insulating space is 20-30mm.

[0019] Further, a fixing tool is arranged between the first sleeve structure layer and the hot blast furnace main pipe, and the bottom of the fixing tool is connected with the connecting seat on the hot blast furnace main pipe through a connecting rod;

[0020] The upper end of the connecting rod is connected with the fixing tool, and the fixing tool is an open rectangular structure, and the opening distance of the fixing tool is the same as the thickness of the upper end of the first sleeve structure layer.

[0021] The fixing tool and the first sleeve structure layer are matched in a plug-in mode.

[0022] Further, the bottom of the fixing tool is provided with a dovetail slide, and the dovetail slide is matched with a dovetail sliding block arranged on the connecting rod.

[0023] A method for installing a thermocouple in a high-temperature thermocouple fixing structure of a blast furnace hot blast furnace, comprising the following steps:

[0024] The installation structure and the support platforms on both sides of the insulation space are detachably connected by bolts, the first sleeve structure layer arranged in the installation structure is a I-shaped sleeve structure, and the periphery of the first sleeve structure layer is wrapped with a high-temperature resistant layer.

[0025] The end face of the insulation space is detachably provided with a closing cover, and the bottom edge of the first sleeve structure layer is in contact with the closing cover and is fixed by bolts.

[0026] An installation channel through which the first sleeve structure layer penetrates is reserved at the center position of the closing cover.

[0027] A second sleeve structure layer is arranged in a splicing mode in the vertical direction of the first sleeve structure layer, and the second sleeve structure layer is coaxially arranged with the first sleeve structure layer, and a thermocouple is installed in the first sleeve structure layer and the second sleeve structure layer, and the flange end face of the thermocouple is connected with the flange end face of the second sleeve structure layer through bolts.

[0028] A high-temperature thermocouple fixing structure and method of a blast furnace hot blast furnace are applied to the installation of a thermocouple in a blast furnace hot blast pipe, so that the damage to the thermocouple during the installation process is avoided, and the service life of the thermocouple is prolonged.

[0029] Compared with the prior art, the high-temperature thermocouple fixing structure and method of the blast furnace hot blast furnace have the following beneficial effects:

[0030] The first sleeve structure layer and the second sleeve structure layer are coaxially arranged and detachably matched, so that the first sleeve structure layer and the second sleeve structure layer can be disassembled and replaced, and in the use state, the flange on the thermocouple is in contact with the flange on the second sleeve structure layer and is matched through bolts.

[0031] The second sleeve structure layer can adjust the height, and the diameter of the bottom of the second sleeve structure layer is smaller than the diameter of the end face of the first sleeve structure layer.

[0032] In use state, according to the different actual working condition, the flange on thermocouple and the flange on first sleeve structure layer contact and cooperate through bolt.

[0033] The utility model discloses a fixed tooling can effectively prevent the deformation of the first sleeve structure layer from affecting the installation of the thermocouple. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is the installation schematic drawing of the hot blast furnace main pipe and the insulation space of the utility model;

[0035] Figure 2 It is the installation schematic drawing of the first sleeve structure layer and the second sleeve structure layer of the utility model;

[0036] Figure 3 It is the schematic drawing of the support platform of the two sides of the insulation space of the utility model;

[0037] Figure 4 It is the enlarged schematic drawing of the fixed tooling on the hot blast furnace main pipe of the utility model;

[0038] Figure 5 It is the enlarged schematic drawing of the first sleeve structure layer and the insulation space of the utility model;

[0039] Figure 6 It is the enlarged schematic drawing of the fixed tooling of the utility model;

[0040] Figure 7 It is the installation enlarged schematic drawing of the first sleeve structure layer and the insulation space of the utility model;

[0041] Figure 8 It is the schematic drawing of the thermocouple installation structure of the utility model. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the utility model.

[0043] In the description of the utility model, it should be explained that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "connection" should be understood broadly, for example, can be fixed connection, can be detachable connection, or integrally connected, can be directly connected, or indirectly connected through intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0044] In the description of the utility model, it needs to understand that the orientation or position relation indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relation shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model.

[0045] As shown in Figures 1-8 A high-temperature thermocouple fixing structure for a blast furnace hot blast stove, comprising a hot blast stove main pipe 1, a hot blast pipe shell 2 is arranged on the periphery of the hot blast stove main pipe 1, an insulation space 3 is arranged outwardly protruding along the circumference of the hot blast pipe shell 2, and a mounting structure 4 for fixing a thermocouple 4 is arranged inside / outside the insulation space 3.

[0046] The insulation space 3 is connected to the hot blast pipe shell in a fixed or detachable manner.

[0047] A first sleeve structure layer 5 is arranged inside the mounting structure 4, a second sleeve structure layer 6 is arranged in a splicing manner in the vertical direction of the first sleeve structure layer 5, the first sleeve structure layer 5 and the second sleeve structure layer 6 are coaxially arranged, a thermocouple 4 is arranged inside the first sleeve structure layer 5 and the second sleeve structure layer 6, the thermocouple 4 extends into the hot blast stove main pipe 1, the insulation spaces 3 on the hot blast stove main pipe 1 are arranged at intervals, and each insulation space 3 is arranged at a different depth to set a thermocouple temperature measurement point.

[0048] In order to reduce the influence of the hot blast stove main pipe 1 on the upper space of the thermocouple and the thermocouple ceramic protective sleeve in the use state by arranging the insulation space, the insulation space 3 is a hollow structure protruding from the hot blast stove main pipe 1, and the mounting structure 4 is arranged in a fixed manner in the insulation space 3.

[0049] The mounting structure 4 is a cavity sleeve structure arranged in a shape similar to the insulation space 3, and the mounting structure 4 is detachably connected to the support platforms 7 on both sides of the insulation space 3.

[0050] The above structure can support the mounting structure 4 in the insulation space.

[0051] A through hole 8 coaxially arranged with the first sleeve structure layer 5 and the second sleeve structure layer 6 is arranged at the center position of the mounting structure 4.

[0052] A fixing hole is arranged at the bottom of the first sleeve structure layer 5, and the fixing hole on the first sleeve structure layer 5 is inserted and matched with a positioning column arranged on the support platform to limit the positioning.

[0053] The lower end diameter of the first sleeve structure layer 5 is smaller than the upper end diameter, and the diameter of the bottom of the first sleeve structure layer 5 is smaller than the distance between the bolt holes on the support platform.

[0054] In order to facilitate detachable replacement in the use state, the mounting structure 4 and the support platform 7 on both sides of the insulation space 3 are detachably connected by bolt connection.

[0055] When the above-mentioned detachable connection is adopted, it is beneficial to replace and install the thermocouple. After the thermocouple is removed, the construction personnel can directly install the new thermocouple after cleaning the flange surface.

[0056] In order to facilitate protection of the thermocouple by the first sleeve structure layer 5 in the use state, the first sleeve structure layer 5 provided in the mounting structure 4 is a I-shaped sleeve structure, and the periphery of the first sleeve structure layer 5 is wrapped with a high-temperature resistant layer 9.

[0057] The bottom edge of the first sleeve structure layer 5 is in contact with the end face of the insulation space 3;

[0058] The end face of the insulation space 3 is provided with a detachable closure cover 10, and the bottom edge of the first sleeve structure layer 5 is in contact with the closure cover 10;

[0059] The center position of the closure cover is reserved with an installation channel for the first sleeve structure layer 5 to pass through.

[0060] The above-mentioned closure cover can be used for fixing and can be removed and replaced in the use state.

[0061] In order to facilitate setting of the thermocouple temperature measuring point according to different depths of each insulation space 3 in the use state, the first sleeve structure layer 5 and the second sleeve structure layer 6 are detachably connected, the second sleeve structure layer 6 has the same structure as the first sleeve structure layer 5, and the height of the second sleeve structure layer 6 is adjustable.

[0062] The above-mentioned structure can adjust the height of the second sleeve structure layer 6 according to the different depths of the thermocouple into the hot blast furnace main pipe 1.

[0063] In order to facilitate fixing of the tooling to the outer circumferential extension of the insulation space 3 through the first sleeve structure layer 5 in the use state, the detachable connection between the first sleeve structure layer 5 and the second sleeve structure layer 6 is bolt connection.

[0064] The first sleeve structure layer 5 extends to the outer circumference of the insulation space 3, and the extension distance of the first sleeve structure layer 5 to the outer circumference of the insulation space 3 is 20-30mm.

[0065] In order to facilitate effective control of the first sleeve structure layer 5 on the hot blast stove main pipe 1 in the use state, a fixing tool 11 is arranged between the first sleeve structure layer 5 and the hot blast stove main pipe 1, the fixing tool 11 comprises a fixed end 12, and the bottom of the fixed end 12 is connected with a connecting seat 14 on the hot blast stove main pipe 1 through a connecting rod 13.

[0066] The upper end of the connecting rod 13 is connected with the fixing tool 11, the fixing tool 11 is of an open rectangular structure, and the opening distance of the fixing tool 11 is the same as the thickness of the upper end of the first sleeve structure layer 5.

[0067] The fixing tool 11 and the first sleeve structure layer 5 are matched in a plug-in mode.

[0068] The above structure can prevent different degrees of deformation caused by the influence of temperature and expansion of refractory bricks by matching the first sleeve structure layer 5 with the isolation space during the production process.

[0069] In the use state, the flange on the thermocouple is in contact with the flange on the second sleeve structure layer 6 and is matched through bolts.

[0070] The second sleeve structure layer 6 can adjust the height, and the diameter of the bottom of the second sleeve structure layer 6 is smaller than the end face diameter of the first sleeve structure layer 5.

[0071] In the use state, according to different actual working conditions, the flange on the thermocouple is in contact with the flange on the first sleeve structure layer 5 and is matched through bolts.

[0072] In order to facilitate the cooperation of the fixed end of the fixing tool 11 and the dovetail sliding block on the connecting rod in the use state, a dovetail sliding way is arranged at the bottom of the fixing tool 11, the dovetail sliding way is matched with the dovetail sliding block arranged on the connecting rod, and when sliding to the position, the outside is fixed through bolts.

[0073] The first sleeve structure layer 5 and the second sleeve structure layer 6 are combined with the isolation space 3 to fix the thermocouple, the hole of the first sleeve structure layer and the hole of the second sleeve structure layer are perpendicular to the hole of the refractory pipe, new thermocouples are installed, the bolts / flanges are fastened, and the flange sealing pad is ensured to be tight and not to leak air.

[0074] A method for installing a thermocouple in a blast furnace hot blast stove high-temperature thermocouple fixing structure, comprising the following steps:

[0075] The installation structure is detachably connected to the support platforms on both sides of the isolation space by bolt connection. The first sleeve structure layer set in the installation structure is an I-shaped sleeve structure, and the outer periphery of the first sleeve structure layer is wrapped with a high-temperature heat-resistant layer.

[0076] The end face of the isolation space is provided with a detachable sealing cover, and the bottom edge of the first sleeve structure layer contacts the sealing cover and is fixed by bolts;

[0077] An installation channel is reserved in the center of the closed cover, through which the first sleeve structure layer passes;

[0078] A second sleeve structure layer is spliced ​​in the vertical direction of the first sleeve structure layer. The second sleeve structure layer is installed and is coaxial with the first sleeve structure layer. Thermocouples are installed in the first and second sleeve structure layers. The flange end face of the thermocouple is connected to the flange end face of the second sleeve structure layer by bolts.

[0079] A high-temperature thermocouple fixing structure and method for blast furnace hot blast stoves is applied to the installation of thermocouples in blast furnace hot blast pipelines, eliminating damage to the thermocouples during the installation process and extending the service life of the thermocouples.

[0080] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0081] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-temperature thermocouple fixing structure for a hot blast stove of a blast furnace, comprising a main pipe (1) of the hot blast stove, characterized in that: The outer periphery of the hot blast furnace main pipe (1) is provided with a hot blast pipe shell (2), an insulation space (3) is provided outward along the circumference of the hot blast pipe shell (2), and a mounting structure (4) for fixing a thermocouple is arranged in / outer of the insulation space (3); A first sleeve structure layer (5) is arranged in the mounting structure (4), a second sleeve structure layer (6) is arranged in a splicing manner in the vertical direction of the first sleeve structure layer (5), the first sleeve structure layer (5) and the second sleeve structure layer (6) are coaxially arranged, a thermocouple is arranged in the first sleeve structure layer (5) and the second sleeve structure layer (6), the thermocouple extends into the hot blast furnace main pipe (1), the insulation spaces (3) on the hot blast furnace main pipe (1) are arranged at intervals, and thermocouple temperature measuring points are arranged at different depths at each insulation space (3) position.

2. The fixed structure of high temperature thermocouple of blast furnace hot blast stove according to claim 1, characterized in that: The insulation space (3) is a hollow structure protruding from the hot blast furnace main pipe (1), and the insulation space (3) is fixedly provided with a mounting structure (4); The mounting structure (4) is a cavity sleeve structure which is shaped according to the insulation space (3), and the mounting structure (4) is detachably connected to the support platforms (7) on both sides of the insulation space (3); A through hole (8) coaxially arranged with the first sleeve structure layer (5) and the second sleeve structure layer (6) is arranged at the center position of the mounting structure (4).

3. The fixed structure of high temperature thermocouple of blast furnace hot blast stove according to claim 2, characterized in that: The mounting structure (4) and the support platforms (7) on both sides of the insulation space (3) are detachably connected by bolts.

4. The fixed structure of high temperature thermocouple of blast furnace hot blast stove according to claim 3, characterized in that: The first sleeve structure layer (5) arranged in the mounting structure (4) is an I-shaped sleeve structure, and the outer periphery of the first sleeve structure layer (5) is wrapped with a high-temperature resistant layer (9); The bottom edge of the first sleeve structure layer (5) is in contact with the end face of the insulation space (3); The end face of the insulation space (3) is detachably provided with a closure cover (10), and the bottom edge of the first sleeve structure layer (5) is in contact with the closure cover (10); The center position of the closure cover is reserved with a mounting channel through which the first sleeve structure layer (5) penetrates.

5. The fixed structure of high temperature thermocouple of blast furnace hot blast stove according to claim 4, characterized in that: The first sleeve structure layer (5) and the second sleeve structure layer (6) are detachably connected, the second sleeve structure layer (6) is the same in structure as the first sleeve structure layer (5), and the height of the second sleeve structure layer (6) is adjustable.

6. The fixed structure of high temperature thermocouple of blast furnace hot blast stove according to claim 5, characterized in that: The detachable connection between the first sleeve structure layer (5) and the second sleeve structure layer (6) is a bolt connection; The first sleeve structure layer (5) extends to the outer circumference of the insulation space (3), and the extension distance of the first sleeve structure layer (5) to the outer circumference of the insulation space (3) is 20-30mm.

7. The fixed structure of high temperature thermocouple of blast furnace hot blast stove according to claim 6, characterized in that: A fixing tool (11) is arranged between the first sleeve structure layer (5) and the hot blast furnace main pipe (1), the fixing tool (11) comprises a fixed end (12), and the bottom of the fixed end (12) is connected to a connecting seat (14) on the hot blast furnace main pipe (1) through a connecting rod (13); The upper end of the connecting rod (13) is connected with the fixed tooling (11), the fixed tooling (11) is an open rectangular structure, and the open distance of the fixed tooling (11) is the same as the thickness of the upper end of the first sleeve structure layer (5). The fixed tooling (11) and the first sleeve structure layer (5) are matched in a plug-in mode.

8. The fixed structure of high temperature thermocouple of blast furnace hot blast stove according to claim 7, characterized in that: The bottom of the fixed tooling (11) is provided with a dovetail slide, and the dovetail slide cooperates with a dovetail sliding block arranged on the connecting rod.

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