An explosion-proof inner wall device for a slag pit

Abstract

The utility model belongs to the field of the equipment technology of the slag pot, and relates to a slag pot explosion -proof inner wall device, including the pool body of concrete pouring, the inside of pool body is provided with the protective inner wall that is made of many steel blanks and is spliced, the protective inner wall includes the bottom layer steel blank that is laid in the pool bottom, the first steel blank group that constitutes the north -south side inner wall and the second steel blank group that constitutes the east -west side inner wall, and the bottom gap is reserved between the periphery of bottom layer steel blank and the pool body side wall. The utility model replaces the traditional bolt connection by the mortise and tenon interlocking and extrusion fixed mode, effectively resists the steel slag impact and thermal stress, strengthens the structural stability and security, and reduces the maintenance frequency and cost.

Description

Technical Field

[0001] This utility model belongs to the technical field of slag-sealing tank equipment, specifically relating to an explosion-proof inner wall device for a slag-sealing tank. Background Technology

[0002] In the stainless steel smelting process, hot slag quenching is an operational step that requires the use of a quenching tank. The inner wall structure of the quenching tank is subjected to harsh working conditions for a long time: it must withstand the intense heat radiation of steel slag at nearly 1,000 degrees Celsius, the mechanical impact of excavators digging slag, and the thermal stress and large amount of water vapor erosion generated during water cooling.

[0003] Currently, the traditional design for the inner wall of slag traps commonly used by steel companies is "concrete substrate + pre-embedded bolts to fix steel billets". Specifically, concrete is first poured on site to form the tank body, a large number of high-strength bolts are pre-embedded in the surrounding walls, and then thick steel billets with pre-drilled installation holes are fastened to the inner wall with nuts to form a protective layer.

[0004] However, as the sole connecting component, the pre-embedded bolts suffer a sharp decline in mechanical properties at their threaded sections under the combined effects of high-temperature thermal stress and moisture corrosion, making them highly susceptible to brittle fracture or shearing at the root. If multiple bolts fail, the entire steel billet loses its restraint, undergoing severe bending deformation under the pressure of slag, and may even collapse entirely, not only losing its protective function but also posing a significant safety hazard. Gaps inevitably exist between the steel billet and the concrete wall due to installation and deformation. During excavation and slag removal operations, fine, high-hardness steel slag will inevitably infiltrate these gaps. Upon cooling, the infiltrated slag becomes extremely hard, exerting a continuous "wedge-shaped" compression effect on the steel billet, greatly accelerating its deformation process. The deformed billet then widens the gaps, creating a vicious cycle of "slag intrusion - intensified deformation - larger gaps - more slag intrusion."

[0005] Under the alternating effects of prolonged high-temperature baking and moisture penetration, concrete will experience spalling, decomposition of internal hydrates, leading to loss of strength, cracking, and powdering. If the anchoring foundation of the pre-embedded bolts is damaged, even if the bolts themselves are not broken, they will be pulled out of the loose concrete as a whole, resulting in fixation failure.

[0006] The aforementioned problems directly lead to a shortened equipment lifespan. Furthermore, maintenance requires thorough cleaning of steel slag, removal of scrapped steel billets, chiseling away ineffective concrete, re-embedding bolts, pouring and curing new concrete, and then installing new steel billets. The entire process is time-consuming and costly. Moreover, the entire slag-sealing process is interrupted during the downtime, forcing the steel slag to be stored in the open, which not only occupies space and increases transportation costs but also brings environmental pressures such as dust and water pollution.

[0007] In summary, existing technologies, due to limitations in their structural principles, cannot fundamentally solve the problem of long-term service life of the inner wall of a slag-sealing pit under extreme working conditions. Therefore, this paper proposes an explosion-proof inner wall device for slag-sealing pits to completely eliminate excessive reliance on bolt connections, improve the overall stability and durability of the inner wall, thereby significantly extending the maintenance cycle, reducing the total life cycle cost, and eliminating safety hazards. Utility Model Content

[0008] The purpose of this utility model is to provide an explosion-proof inner wall device for a slag-sealing tank, which has the advantages of stable structure, long service life and no need for frequent maintenance. It solves the problems of deformation, collapse and high maintenance costs of the inner wall caused by bolt corrosion and breakage, steel slag intrusion into the gaps and failure of the concrete matrix in the prior art.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides an explosion-proof inner wall device for a slag-filling tank, including a tank body made of concrete, and a protective inner wall made of multiple steel billets is provided on the inner side of the tank body. The protective inner wall includes a bottom layer of steel billets laid on the bottom of the tank, a first group of steel billets forming the inner walls on the north and south sides, and a second group of steel billets forming the inner walls on the east and west sides. A bottom gap is reserved between the bottom layer of steel billets and the side wall of the tank body.

[0010] The first billet group is made up of multiple first billets laid side by side in the horizontal direction. The bottommost first billet has a first connecting part extending downward. The first connecting part is inserted into the bottom gap. Two adjacent first billets are connected to each other by a male groove on one and a female groove on the other. The side walls of the first billets at both ends are provided with E-shaped embedding parts.

[0011] The second billet group is formed by laying multiple second billets horizontally. The bottom of the second billet is provided with a downwardly extending second connecting part, which is inserted into the bottom gap. The second billets at both ends are provided with T-shaped protrusions, which are embedded in E-shaped embedding parts to form a compression-type fixed connection.

[0012] Preferably, the first steel billets that are adjacent to each other and the second steel billets that are adjacent to each other are further fixed by pre-embedded bolts.

[0013] Preferably, a sealing liner is also included, which extends upward from the bottom plate of the water seal trough of the pool and covers the inner wall of the protective inner wall.

[0014] Preferably, the mating surfaces of the male and female grooves are trapezoidal, dovetail-shaped, or rectangular.

[0015] Preferably, the pool body is reinforced with reinforcing ribs and the inner wall is coated with a quick-drying material, which is a quick-drying high-temperature resistant cement.

[0016] Preferably, the thickness of the first and second steel billets is 150-250 mm.

[0017] Preferably, the opening of the E-shaped insert and the cross-sectional shape of the T-shaped protrusion are interference fit.

[0018] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0019] 1. This utility model replaces the traditional bolt connection with mortise and tenon interlocking and compression fixing, which effectively resists the impact of steel slag and thermal stress, enhances structural stability and safety, and reduces maintenance frequency and cost;

[0020] 2. This utility model has the advantages of stable structure, long service life and no need for frequent maintenance, and solves the problems of deformation, collapse and high maintenance costs of interior walls caused by bolt corrosion and breakage, steel slag intrusion into gaps and failure of concrete matrix in the prior art. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of an explosion-proof inner wall device for a slag trap, according to one embodiment.

[0023] Figure 2 This is a partial structural diagram of an explosion-proof inner wall device for a slag trap, according to one embodiment.

[0024] In the above figures, 1 is the pool body, 2 is the bottom steel billet, 3 is the first steel billet group, 4 is the E-shaped embedded part, 5 is the second steel billet group, 6 is the T-shaped protrusion, and 7 is the sealing liner. Detailed Implementation

[0025] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0027] Example 1, such as Figure 1-2As shown, an explosion-proof inner wall device for a slag-sealing tank includes a concrete-cast tank body 1. The tank body 1 serves as the foundation and supporting structure of the entire device, bearing the protective inner wall composed of steel billets. The concrete structure is robust, low-cost, and has good high-temperature resistance, providing a stable mounting base for the inner wall. The inner side of the tank body 1 is equipped with a protective inner wall composed of multiple steel billets. The protective inner wall includes a bottom layer of steel billets 2 laid at the bottom of the tank, a first group of steel billets 3 forming the north and south inner walls, and a second group of steel billets 5 forming the east and west inner walls. A bottom gap is reserved between the bottom layer of steel billets 2 and the side walls of the tank body 1.

[0028] The bottom layer of steel billets 2 is laid on the bottom of the pool to withstand the impact of falling steel slag. The bottom gaps reserved around the perimeter and pool walls provide insertion space for the connection between the first steel billet group 3 and the second steel billet group 5. These bottom gaps act as slots, providing initial positioning and bottom support for the vertical steel billets, ensuring accurate installation. The gaps also allow for some displacement of the steel billets during thermal expansion and contraction, reducing stress on the concrete pool body 1. The first steel billet group 3 and the second steel billet group 5 together constitute the main body of the protective inner wall, directly bearing the physical and thermal shock of the steel slag. Modularizing the inner wall, assembling multiple steel billets, facilitates transportation, installation, and partial replacement, reducing manufacturing and maintenance difficulties.

[0029] The first billet group 3 is composed of multiple first billets laid horizontally side by side. The bottommost first billet has a downward-extending first connecting part at its lower part, which is inserted into the bottom gap. Two adjacent first billets are connected by a male groove on one and a female groove on the other. The side walls of the first billets at both ends have E-shaped inserts 4. The male and female grooves form a mortise and tenon structure, realizing the vertical connection between adjacent billets, replacing part of the fixing function of bolts. The mortise and tenon connection creates a mechanical interlocking force, and its impact resistance and deformation resistance are far superior to bolts with single-point stress. The force is evenly distributed to the entire billet through the contact surface, avoiding stress concentration.

[0030] The second billet group 5 is composed of multiple second billets laid horizontally. Each second billet has a downward-extending second connecting portion at its bottom, which inserts into the bottom gap. The second billets at both ends have T-shaped protrusions 6, which embed into E-shaped inserts 4 to form a compression-type fixed connection. The first and second connecting portions are located at the bottom of the first and second billets, respectively, for insertion into the bottom gap of the pool bottom. This provides crucial bottom constraint, preventing the billets from tipping inward and quickly fixing their position during initial installation.

[0031] The T-shaped protrusion 6 is embedded in the E-shaped insert 4 of the first steel billet, forming a horizontal compression-type fixation to create an overall frame. This firmly connects the steel billet assemblies on the north and south sides and the east and west sides at the top, forming a complete rigid grid frame, thus improving overall stability. Under thermal stress and slag impact, the T-shaped structure becomes increasingly tighter within the E-shaped groove, resulting in a more robust connection and exhibiting "self-tightening" characteristics. The interlocking structure, combined with the bottom connecting part, forms a "bottom support and top clamp" fixing mode, eliminating the safety hazard of steel billet tipping.

[0032] The specific design of the aforementioned key components will be discussed in detail below:

[0033] The first steel billets and the second steel billets placed vertically on either side are further secured by pre-embedded bolts. These pre-embedded bolts provide additional fixation to the tenon-and-mortise connections, further enhancing overall integrity. As a redundant design, an extra layer of protection is added to the main mechanical connections. A small number of bolts are used in critical areas to facilitate initial installation and adjustment.

[0034] It also includes a sealing liner 7, which extends upward from the bottom plate of the water seal trough in the pool body 1 and covers the inner wall of the protective inner wall. The sealing liner 7 is part of the original water seal trough structure of the pool body 1. By modifying the bottom plate to extend upward and cover the protective inner wall, it makes full use of the existing structure for functional extension, without the need for additional complex sealing system design, achieving a low-cost and high-efficiency improvement. It is integrated with or reliably connected to the water seal trough and can withstand minor scratches from excavators.

[0035] The mating surfaces of the male and female slots are trapezoidal, dovetail-shaped, or rectangular. Trapezoidal and dovetail shapes possess self-locking properties; when subjected to downward or lateral forces, the inclined surfaces of the slots generate greater friction and compressive forces, tightening the connection and preventing the steel billet from slipping out, resulting in extremely high tensile and shear resistance. Rectangular shapes are simple to manufacture and rely on precise fit to resist shear forces; their load-bearing capacity is still far superior to simple bolt connections, effectively resisting the impact of steel slag.

[0036] The tank body 1 is reinforced with reinforcing ribs and its inner wall is coated with a quick-drying, high-temperature resistant cement. Before installing the steel billet, the concrete tank body 1 is repaired and strengthened. The reinforcing ribs are embedded in the concrete to improve the integrity and tensile strength of the substrate. The quick-drying, high-temperature resistant cement quickly forms a smooth and solid new working surface, solving the problem of insufficient anchoring force of the pre-embedded bolts. The quick-drying material shortens the curing time, greatly reducing the maintenance period. The special material can adapt to the high-temperature environment of the slag-sealing tank and is not prone to failure again.

[0037] The thickness of the first and second steel billets is 150-250mm. This thickness range is the optimal range derived from actual working conditions and cost control. A thickness <150mm results in insufficient strength, making it susceptible to bending or puncture by impacts from steel slag, thus failing to guarantee the design life; a thickness >250mm provides higher strength, but significantly increases material costs, hoisting difficulty, and loss of effective volume in pool 1, resulting in poor cost-effectiveness.

[0038] The opening of the E-type insert 4 and the cross-sectional shape of the T-type protrusion 6 are interference fit. The size of the T-type protrusion 6 is slightly larger than the opening size of the E-type insert 4, requiring external force such as a rubber mallet or jack to press it in during installation. This effectively resists vibration and impact during equipment operation, prevents the T-type protrusion 6 from loosening from the E-type opening, and ensures the long-term reliability of the top connection. The interference fit ensures that the steel billet assemblies on the east, west, north, and south sides are tightly joined at the joint, greatly enhancing the overall rigidity and stability of the entire inner wall frame.

[0039] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0040] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A device for an explosion-proof inner wall of a slag-sealing tank, comprising a concrete-cast tank body, wherein a protective inner wall composed of multiple steel billets is provided on the inner side of the tank body, characterized in that, The protective inner wall includes a bottom steel billet laid on the bottom of the pool, a first steel billet group forming the inner walls on the north and south sides, and a second steel billet group forming the inner walls on the east and west sides. A bottom gap is reserved between the bottom steel billet and the side wall of the pool. The first billet group is made up of multiple first billets laid side by side in the horizontal direction. The bottommost first billet has a first connecting part extending downward. The first connecting part is inserted into the bottom gap. Two adjacent first billets are connected to each other by a male groove on one and a female groove on the other. The side walls of the first billets at both ends are provided with E-shaped embedding parts. The second billet group is formed by laying multiple second billets horizontally. The bottom of the second billet is provided with a downwardly extending second connecting part, which is inserted into the bottom gap. The second billets at both ends are provided with T-shaped protrusions, which are embedded in E-shaped embedding parts to form a compression-type fixed connection.

2. The explosion-proof inner wall device for a slag-sealing tank according to claim 1, characterized in that, The first steel billets that are adjacent to each other and the second steel billets that are adjacent to each other are further fixed by pre-embedded bolts.

3. The explosion-proof inner wall device for a slag-sealing tank according to claim 1, characterized in that, It also includes a sealing liner that extends upward from the bottom plate of the water seal trough of the pool and covers the inner wall of the protective inner wall.

4. The explosion-proof inner wall device for a slag-sealing tank according to claim 1, characterized in that, The mating surfaces of the male and female grooves are trapezoidal, dovetail-shaped, or rectangular.

5. The explosion-proof inner wall device for a slag-sealing tank according to claim 1, characterized in that, The pool body is reinforced with ribs and the inner wall is coated with a quick-drying material, which is a quick-drying high-temperature resistant cement.

6. The explosion-proof inner wall device for a slag-sealing tank according to claim 1, characterized in that, The thickness of the first and second steel billets is 150-250mm.

7. The explosion-proof inner wall device for a slag-sealing tank according to claim 1, characterized in that, The opening of the E-type insert and the cross-sectional shape of the T-type protrusion are interference fit.

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