Rapid reinforcing structure for converter mouth platform beam
By designing a rapid reinforcement structure on the H-shaped steel beam of the converter furnace entrance platform beam, including welding rib plates, pouring high-temperature grouting materials and setting exhaust holes, the problem of poor timeliness of the existing reinforcement methods is solved, and the effect of repairing in a short time, extending service life and saving costs is achieved.
Patent Information
- Application Number
- CN202421481887.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-06-26
AI Technical Summary
The converter furnace port platform beam is fatigued due to circulating thermal stress during high temperature baking, resulting in bending deformation and web tear. The existing reinforcement method has poor aging effect, and the construction period of replacing the platform beam is long and costly.
A rapid reinforcement structure was designed, by welding rib plates equidistantly on both sides of the web of the H-shaped steel beam, and pouring high-temperature grouting materials into each unit to form fill blocks, full of welded steel plates on the outside, and an anchor and a spray-filled coating were installed on the surface of the steel plate to penetrate the exhaust holes to relieve heat and internal pressure.
The reinforced structure can be repaired in a short time, ensuring that the furnace port platform beam reaches the load-bearing capacity design value, extends service life, saves repair costs, reduces the impact on production, and improves the compressive strength and durability of high-temperature grouting materials.
Smart Images
Figure CN222893188U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of metallurgical steel structure building reinforcement, in particular to a rapid reinforcement structure for a converter furnace mouth platform beam. Background Art
[0002] When the converter is performing oxygen blowing smelting, the furnace mouth is in a vertical position, and the top of the furnace mouth is facing the furnace mouth platform beams on both sides. A large amount of smoke and heat will be generated during the smelting process, and a small amount of molten iron and steel slag will overflow and splash onto the furnace mouth platform beams. At this time, the furnace mouth platform beams will be subjected to strong thermal radiation and erosion by molten iron and steel slag. Due to the cyclic operation of converter steelmaking, the furnace mouth platform beams will undergo repeated heating and cooling processes, generating cyclic thermal stress, causing material fatigue of the platform beams, and under the action of the load above the platform beams, the furnace mouth platform beams will eventually bend and deform or even tear the web.
[0003] The furnace mouth platform beam is mainly composed of H-shaped steel beams. After the H-shaped steel beams are deformed and damaged, the bearing capacity of the platform beams decreases, which seriously affects the safe use of the converter steel structure platform. When the deformation and damage of the H-shaped steel beams are not serious, emergency reinforcement and repair are usually carried out by welding steel plates to the upper and lower flanges and webs of the H-shaped steel beams. This repair method is simple and efficient to construct, but under the action of cyclic thermal stress, this reinforcement method will gradually fail, and the reinforcement effect is less effective, and the furnace mouth platform beams will gradually deteriorate. Therefore, this repair method cannot completely solve the problem of deformation and damage of the furnace mouth platform beams under high temperature baking. When the furnace mouth platform beams are seriously deformed and damaged, the existing construction technology can only replace the deformed and damaged platform beams. The replacement construction cycle is generally about 10 days. The construction can only be carried out during the specific annual maintenance period of the converter, and the construction is difficult and the repair cost is high. In addition, after the replacement, the furnace mouth platform beams still have many disadvantages such as being deteriorated by the production environment. Summary of the invention
[0004] The technical problem to be solved by the utility model is to provide a rapid reinforcement structure for the furnace mouth platform beam of the converter. The reinforcement structure overcomes the defects of the traditional furnace mouth platform beam reinforcement method, ensures that the furnace mouth platform beam reaches the design value of the bearing capacity after reinforcement, and at the same time extends the service life, saves the repair cost, and ensures the safe use of the converter steel structure platform. The reinforcement and repair time is short, and the construction can be carried out during the annual maintenance of the converter, reducing the impact on production.
[0005] In order to solve the above technical problems, the utility model is used for a rapid reinforcement structure of a converter furnace mouth platform beam, including an H-shaped steel beam of the furnace mouth platform beam, four rib plates are welded at equal intervals on both sides of the web along the length direction of the H-shaped steel beam, and the two sides of the web are divided into three units, and in each unit, a number of transverse steel bars are welded at intervals between the rib plates, and a number of vertical steel bars are welded at intervals between the upper and lower flange plates of the H-shaped steel beam. High-temperature resistant grouting material is poured in each unit to form a filling block, and steel plates are fully welded on the outside of the filling block at the edges of the upper and lower flange plates of the H-shaped steel beam and the edges of the adjacent rib plates. A number of anchors are arranged at intervals on the surface of the steel plate on the converter side and sprayed with a gunning material coating, and a number of exhaust holes are arranged at intervals through the filling block, the steel plate and the gunning material coating in each unit on both sides of the web of the H-shaped steel beam.
[0006] Furthermore, basalt fiber is added into the high temperature resistant grouting material.
[0007] Furthermore, the rib plate is a steel plate with a thickness of 10 mm.
[0008] Furthermore, the transverse steel bars and vertical steel bars are ribbed steel bars with a diameter of 10 mm, and the nodes between the transverse steel bars and the vertical steel bars are tied with wires.
[0009] Furthermore, the thickness of the steel plate is 12 mm.
[0010] Furthermore, there are five exhaust holes with a diameter of 50 mm.
[0011] Since the utility model adopts the above-mentioned technical scheme for the rapid reinforcement structure of the furnace mouth platform beam, that is, the reinforcement structure includes an H-shaped steel beam of the furnace mouth platform beam, four stiffeners are welded at equal intervals on both sides of the web along the length direction of the H-shaped steel beam, and the two sides of the web are divided into three units. In each unit, a number of transverse steel bars are welded between the stiffeners, and a number of vertical steel bars are welded between the upper and lower flange plates of the H-shaped steel beam. High-temperature resistant grouting material is poured in each unit to form a filling block. The outer side of the filling block is fully welded with steel plates at the edges of the upper and lower flange plates of the furnace mouth platform beam and the edges of the adjacent stiffeners. A number of anchors are arranged at intervals on the steel plate surface on the converter side and sprayed with a spraying material coating. Each unit on both sides of the web of the H-shaped steel beam is provided with a number of exhaust holes through the filling blocks, steel plates and spraying material coatings. The reinforcement structure overcomes the defects of the traditional furnace mouth platform beam reinforcement method, ensures that the furnace mouth platform beam reaches the design value of the bearing capacity after reinforcement, and prolongs the service life, saves repair costs, and ensures the safe use of the converter steel structure platform. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The present invention is further described in detail below in conjunction with the accompanying drawings and implementation examples:
[0013] Figure 1 This is a schematic diagram of the rapid reinforcement structure of the converter furnace mouth platform beam of the utility model;
[0014] Figure 2 This is a cross-sectional schematic diagram of the reinforcement structure;
[0015] Figure 3 Make a schematic diagram for this reinforcement structure. DETAILED DESCRIPTION
[0016] Implementation example Figure 1 and Figure 2 As shown, the utility model is used for the rapid reinforcement structure of the converter furnace mouth platform beam, including an H-shaped steel beam 1 of the furnace mouth platform beam, four rib plates 2 are welded at equal intervals on both sides of the web along the length direction of the H-shaped steel beam 1, and the two sides of the web are divided into three units, and in each unit, a number of transverse steel bars 3 are welded between the rib plates 2, and a number of vertical steel bars 4 are welded between the upper and lower flange plates of the H-shaped steel beam 1, and a high-temperature resistant grouting material is poured in each unit to form a filling block 5, and the outer side of the filling block 5 is fully welded with a steel plate 6 at the edge of the upper and lower flange plates of the H-shaped steel beam 1 and the edge of the adjacent rib plate 2, a number of anchors 7 are arranged on the surface of the steel plate 6 on the converter side, and a spraying material coating 8 is sprayed, and each unit on both sides of the web of the H-shaped steel beam 1 is provided with a number of exhaust holes 11 through the filling block 5, the steel plate 6 and the spraying material coating 8.
[0017] Preferably, basalt fiber is added to the high temperature resistant grouting material.
[0018] Preferably, the rib plate 2 is a steel plate with a thickness of 10 mm.
[0019] Preferably, the transverse steel bars 3 and the vertical steel bars 4 are ribbed steel bars with a diameter of 10 mm, and the nodes between the transverse steel bars 3 and the vertical steel bars 4 are tied with wires.
[0020] Preferably, the steel plate 6 has a thickness of 12 mm.
[0021] Preferably, there are five exhaust holes 11 with a diameter of 50 mm.
[0022] like Figure 1 , Figure 2 and Figure 3As shown, when the reinforcement structure is actually manufactured, firstly, the rib plate 2, the transverse reinforcement 3, the vertical reinforcement 4 and the steel plate 6 are welded to the H-shaped steel beam 1, and a number of anchors 7 are arranged at intervals on the surface of the steel plate 6 on the converter side and the spraying material coating 8 is sprayed, and then the jack tube 91 is inserted into the exhaust hole 11 of the steel plate 6 and abuts against the web of the H-shaped steel beam 1. The outer wall of the jack tube 91 is evenly coated with a release agent, and its outer diameter is the same as the diameter of the exhaust hole 11. After the high-temperature resistant grouting material is poured and the spraying material coating 8 is solidified, it is pulled out to form the exhaust hole 11. When pouring the high-temperature resistant grouting material, a pouring hole 61 is opened in the steel plate 6 of each unit, and a pouring pipe 92 is inserted into the pouring hole. The upper opening height of the pouring pipe 92 should be higher than the upper flange plate of the H-shaped steel beam 1. The high-temperature resistant grouting material is injected into the pouring pipe 92 to form the filling block 5 in each unit. After the high-temperature resistant grouting material is poured and initially solidified, the pouring pipe 92 is pulled out.
[0023] The construction period of this reinforcement structure is only 2 days. It can be quickly reinforced in a short time during the scheduled maintenance of the converter without affecting production. It has the advantages of short construction period, low reinforcement and repair cost, safety and reliability, and can ensure the long-term use of the reinforced furnace mouth platform beam.
[0024] The vent holes distributed on this reinforcement structure can relieve the heat and internal stress generated during the hydration process of the high temperature resistant grouting material blocks. After the reinforcement is completed and put into use, the water vapor generated by the high temperature resistant grouting material blocks in a high temperature environment is discharged through the vent holes, which can relieve the internal steam pressure. The basalt fiber mixed inside has high temperature resistance, and the function of the vent holes can greatly reduce the cracks generated by the high temperature resistant grouting material blocks during the maintenance period and use, thereby improving the compressive strength and durability of the high temperature resistant grouting material blocks.
[0025] The steel plate on the surface of the high temperature resistant grouting material filling block can repair the bearing capacity of the deformed and damaged H-shaped steel beam, and the anchor can improve the adhesion strength of the gunning material coating on the steel plate. The gunning material coating is used to reduce the adverse effects of high temperature and splashing molten iron on the furnace platform beam and reinforced structural parts.
Claims
1. A rapid reinforcement structure for a converter furnace mouth platform beam, comprising an H-shaped steel beam of the furnace mouth platform beam, characterized in that: Four stiffeners are welded at equal intervals on both sides of the web along the length direction of the H-beam to divide the two sides of the web into three units. In each unit, a number of transverse steel bars are welded between the stiffeners, and a number of vertical steel bars are welded between the upper and lower flange plates of the H-beam. High-temperature resistant grouting material is poured in each unit to form a filling block. Steel plates are fully welded on the outside of the filling block at the edges of the upper and lower flange plates of the furnace platform beam and the edges of the adjacent stiffeners. A number of anchors are arranged on the surface of the steel plate on the converter side and sprayed with gunning material coating. A number of exhaust holes are arranged at intervals through the filling blocks, steel plates and gunning material coating in each unit on both sides of the web of the H-beam.
2. The rapid reinforcement structure for the converter furnace mouth platform beam according to claim 1, characterized in that: Basalt fiber is added into the high temperature resistant grouting material.
3. The rapid reinforcement structure for the converter furnace mouth platform beam according to claim 1 or 2, characterized in that: The rib plate is a steel plate with a thickness of 10 mm.
4. The rapid reinforcement structure for the converter mouth platform beam according to claim 3 is characterized in that: The transverse steel bars and vertical steel bars are ribbed steel bars with a diameter of 10 mm, and the nodes between the transverse steel bars and the vertical steel bars are tied with iron wires.
5. The rapid reinforcement structure for the converter furnace mouth platform beam according to claim 1, characterized in that: The thickness of the steel plate is 12 mm.
6. The rapid reinforcement structure for the converter furnace mouth platform beam according to claim 1, characterized in that: There are five exhaust holes with a diameter of 50 mm.