Compression resistant column in a large press steel-concrete lower beam

Abstract

The utility model relates to a kind of compression-resistant column in large press steel-mix under crossbeam, to the problem of fatigue resistance and insufficient strength of steel-mix under crossbeam, multiple special steel bars are vertically arranged in steel-mix under crossbeam, steel bar is provided with multiple steps, each step extrudes concrete downwards, the total area of extruded concrete is the sum of the area of all steps, multiple steps greatly increase the pressure-bearing capacity of steel bar, achieving the purpose of steel-mix structure completely replacing steel under crossbeam.The utility model has the advantages of scientific and reasonable design, good use effect and long service life.

Description

Technical Field

[0001] This utility model relates to a press lower beam, specifically to a pressure-resistant column in the lower crossbeam that can decompose and transmit press pressure in layers, belonging to the field of mechanical design and manufacturing technology. Background Technology

[0002] Large presses are the mother machines of the rolling mill industry. Their lower crossbeams bear the extrusion and reverse tension forces. To ensure the mechanical properties of the lower crossbeams, those of free forging presses exceeding 10,000 tons can be over 10 meters long and over 5 meters high, weighing over 1,000 tons. Such massive structures are difficult to manufacture, lift, transport, and install. To address this, a monolithic lower crossbeam made of reinforced concrete was designed, solving the problem of its enormous size and manufacturing difficulty. However, in practical applications, the frequent extrusion and impact of the forging press hammers cause fatigue and insufficient strength in the reinforced concrete structure beneath the hammers, affecting its use and promotion. Therefore, it is necessary to optimize and improve the existing reinforced concrete lower crossbeam structure. Summary of the Invention

[0003] This utility model provides a pressure-resistant column in the steel-concrete lower crossbeam of a large press. Multiple special-shaped steel bars are set in the steel-concrete structure to transmit and decompose the pressure step by step, thereby enhancing the pressure resistance and fatigue resistance of the steel-concrete lower crossbeam.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a pressure-resistant column in the lower crossbeam of a large press steel-concrete composite structure, comprising: a workbench, an embedded plate, and a lower crossbeam of steel-concrete composite structure, wherein the workbench is positioned above the embedded plate, the embedded plate is positioned above the lower crossbeam of steel-concrete composite structure, and the pressure of the press borne by the workbench is transmitted to the lower crossbeam of steel-concrete composite structure through the embedded plate, characterized in that:

[0005] The lower crossbeam of the steel-concrete structure is vertically equipped with multiple compression-resistant columns;

[0006] The compression-resistant column is a special type of steel bar with multiple steps on its outer surface;

[0007] The compression-resistant column is cast into the reinforced concrete lower crossbeam, with its upper end fixed to the connecting plate and its lower end placed in the concrete.

[0008] Furthermore, the special-shaped steel bar is composed of multiple frustums or pyramids.

[0009] Furthermore, the frustum or truncated pyramid is configured to be either smaller at the top and larger at the bottom, or larger at the top and smaller at the bottom.

[0010] Preferably, the special-shaped steel bar is configured as a tapered bar that is larger at the top and smaller at the bottom.

[0011] Preferably, the cross-section of the compression-resistant column is a regular polygon.

[0012] Preferably, the radial outer edge of the compression-resistant column has a rough surface.

[0013] This invention addresses the problem of insufficient fatigue resistance and strength of reinforced concrete lower beams by vertically arranging multiple specially shaped steel bars in the reinforced concrete lower beam. The steel bars have multiple steps, with each step pressing down on the concrete. The total area of ​​the pressed concrete is the sum of the areas of all the steps. The multi-step arrangement greatly increases the bearing capacity of the steel bars, achieving the goal of completely replacing the steel lower beam with a reinforced concrete structure.

[0014] This invention has the advantages of scientific and reasonable design, good performance and long service life. Attached Figure Description

[0015] Appendix Figure 1 This is a schematic diagram of the main cross-sectional structure of one embodiment of the present invention.

[0016] Appendix Figure 2 For the appendix Figure 1 Sectional view along line AA,

[0017] Appendix Figure 3 For the appendix Figure 1 BB section view,

[0018] Appendix Figure 4 This is a schematic diagram of the main cross-sectional structure of Embodiment 2 of this utility model.

[0019] Appendix Figure 5 This is a schematic diagram of the main cross-sectional structure of embodiment three of this utility model.

[0020] In the attached diagram, 1 is the movable workbench, 2 is the embedded plate, 3 is the pressure-resistant column, 4 is the base plate, and 5 is the foundation. Detailed Implementation

[0021] Implementation Method 1:

[0022] As attached Figure 1 , 2 As shown in Figure 3, the movable workbench 1 can move on the embedded plate 2 and transmit the working pressure of the press to the embedded plate 2. The embedded plate 2 transmits the pressure to the steel-concrete lower beam through the pressure-resistant column 3. Since the upper end of the pressure-resistant column 3 is fixedly connected to the embedded plate 2 and is cast in the steel-concrete lower beam, when the embedded plate 2 is compressed, the lower end of each step set on the pressure-resistant column 3 squeezes the concrete below it. Since there are many steps, the area of ​​the concrete squeezed is greatly increased, and thus the pressure of the pressure-resistant column 3 on the concrete is greatly reduced, thereby improving the bearing capacity of the steel-concrete lower beam.

[0023] Implementation Method Two:

[0024] As attached Figure 4As shown, unlike the first embodiment, the steps of the compression column 3 are set to be larger at the top and smaller at the bottom. When the embedded plate 2 is compressed, the conical or sloping surface below each step of the compression column 3 squeezes the concrete below it. Since there are many steps, the area of ​​the concrete being squeezed is greatly increased. Therefore, the pressure of the compression column 3 on the concrete is greatly reduced, thereby improving the bearing capacity of the steel-concrete lower beam.

[0025] Implementation Method 3:

[0026] As attached Figure 5 As shown, unlike Embodiments 1 and 2, the column of the compression-resistant column 3 gradually decreases in size from top to bottom, adapting to the working condition where the pressure on the concrete gradually decreases from top to bottom, thus saving raw materials. This technology can be used in Embodiment 1 or Embodiment 2.

[0027] As attached Figure 1 , 2 As shown in Figures 3, 4, and 5, the base plate 4 is a steel-concrete lower crossbeam bottom plate, which is placed on the foundation 5.

Claims

1. A compression-resistant column in the lower crossbeam of a large steel-concrete press, comprising: The system comprises a workbench, an embedded plate, and a reinforced concrete lower crossbeam. The workbench is positioned above the embedded plate, which is located above the reinforced concrete lower crossbeam. The workbench bears the pressure of the press, which is transmitted to the reinforced concrete lower crossbeam through the embedded plate. The system is characterized by: The lower crossbeam of the steel-concrete structure is vertically equipped with multiple compression-resistant columns; The compression-resistant column is a special type of steel bar with multiple steps on its outer surface; The compression-resistant column is cast into the reinforced concrete lower crossbeam, with its upper end fixed to the connecting plate and its lower end placed in the concrete.

2. The compression-resistant column in the steel-concrete lower crossbeam of a large press according to claim 1, characterized in that: The special-shaped steel bar is composed of multiple frustums or pyramids.

3. The compression-resistant column in the steel-concrete lower crossbeam of a large press according to claim 1, characterized in that: The special-shaped steel bar is designed as a tapered bar, wider at the top and narrower at the bottom.

4. The compression-resistant column in the lower crossbeam of a large press steel-concrete composite structure according to claim 1, characterized in that: The cross-section of the compression-resistant column is a regular polygon.

5. The compression-resistant column in the steel-concrete lower crossbeam of a large press according to claim 1, characterized in that: The radial outer edge of the compression-resistant column has a rough surface.

6. The compression-resistant column in the lower crossbeam of a large press steel-concrete composite structure according to claim 2, characterized in that: The frustum or truncated pyramid is configured to be either smaller at the top and larger at the bottom, or larger at the top and smaller at the bottom.

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