High-pressure water descaling device for hot-rolled ribbed steel bars

Abstract

The utility model provides a high-pressure water descaling device for hot-rolled ribbed steel bars. The high-pressure water descaling device comprises a descaling box arranged in the rolling advancing direction of the ribbed steel bars, a water supply system and a water return system, wherein the water supply system and the water return system are connected with the descaling box; the descaling box is a rectangular box body with two open ends, the middle of the descaling box is provided with a conveying channel for the ribbed steel bars to penetrate through, an upper partition plate is arranged above the conveying channel, an upper water cavity is formed between the upper partition plate and a top plate of the descaling box, a lower partition plate is arranged below the conveying channel, and a lower water cavity is formed between the lower partition plate and a bottom plate of the descaling box; the upper water cavity and the lower water cavity are respectively connected with high-pressure water inlet pipes; the upper partition plate and the lower partition plate are each provided with a plurality of water holes in the length direction, and the water holes are all inclined water holes pointing to the feeding direction of the ribbed steel bars. By controlling the water spraying angle of the water holes, the spraying angle of high-pressure water is gradually changed, oxide scales on the surface of the ribbed steel bar are comprehensively and thoroughly removed, and dead angles are effectively eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of ribbed steel bars, in particular to a high-pressure water descaling device for hot-rolled ribbed steel bars. Background Art

[0002] Hot-rolled ribbed steel bars, commonly known as threaded steel bars, have high strength, high toughness, and good seismic resistance. They are ideal products for high-rise buildings and are widely used in the field of building concrete. In order to increase the corrosion resistance of steel bars and improve the strength and life of reinforced concrete, hot-dip galvanizing is usually performed on the outside of hot-rolled ribbed steel bars. After hot-dip galvanizing, the surface of the steel bar is covered with a pure zinc layer in the form of complete physical protection. A Zn-Fe alloy layer is also formed between the pure zinc layer and the steel bar matrix, which isolates the steel bar matrix from the atmosphere, thereby protecting the steel bar matrix from corrosion.

[0003] The existing technology is that the downstream galvanizing plant uses ribbed steel bars of a certain length (several meters in length) produced by the upstream hot rolling plant as raw materials. The ribbed steel bars at room temperature are ground to remove iron oxide scale, degreased, and heated, and then hoisted into bundles into a zinc pot for hot-dip galvanizing and post-galvanizing treatment. This is a discontinuous small-batch short-size production and is not suitable for galvanizing long steel bars of more than ten meters. At the same time, the labor intensity of workers is high, the working environment is poor, the production efficiency is low, the output is low, and the unit energy consumption is high.

[0004] After hot rolling at high temperature, the surface of hot-rolled ribbed steel bars will oxidize to form a layer of iron oxide, which will seriously affect the subsequent zinc coating and the firmness of the galvanized layer. Therefore, the iron oxide scale needs to be removed. However, since the hot-rolled ribbed steel bars after cutting and rolling are multiple parallel bars, and the longitudinal ribs and transverse ribs on the surface of the ribbed steel bars are staggered, the descaling process is very likely to have a dead angle, thus affecting the performance of the galvanized ribbed steel bars. Utility Model Content

[0005] The utility model overcomes the drawbacks of the prior art and provides a high-pressure water descaling device for hot-rolled ribbed steel bars, so as to fully remove the iron oxide scale on the outer surface of the ribbed steel bars and eliminate dead corners.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A high-pressure water descaling device for hot-rolled ribbed steel bars comprises a descaling box arranged along the rolling direction of the ribbed steel bars, and a water supply system and a return water system connected to the descaling box; the descaling box is a rectangular box body with openings at both ends, and a conveying channel for the ribbed steel bars to pass through is arranged in the middle, an upper partition is arranged above the conveying channel, and an upper water cavity is formed between the upper partition and the top plate of the descaling box, a lower partition is arranged below the conveying channel, and a lower water cavity is formed between the lower partition and the bottom plate of the descaling box, and the upper water cavity and the lower water cavity are respectively connected to a high-pressure water inlet pipe; a plurality of water holes are opened on the upper partition and the lower partition along the length direction, and the water holes are all inclined water holes pointing to the incoming direction of the ribbed steel bars.

[0008] A further improvement of the utility model is that the descaling box is formed by fastening an upper box body and a lower box body with a plurality of high-strength fastening bolts after the upper box body and the lower box body are relatively buckled.

[0009] A further improvement of the utility model is that the angle α between the water hole and the vertical direction gradually increases in an arithmetic progression along the traveling direction of the ribbed steel bar, and the value range of the angle α is usually 0°~45°.

[0010] A further improvement of the utility model is that the water hole at the front end has an angle α of 0° to 5°, and the water hole at the rear end has an angle α of 40° to 45°.

[0011] A further improvement of the utility model is that: the inlet end of the descaling box is also provided with a bell mouth for feeding the ribbed steel bars into the descaling box.

[0012] A further improvement of the utility model is that the water supply system comprises a clean circulating water pool, a water supply pump, a compressor and a high-pressure water main pipe which are arranged in sequence, and the high-pressure main pipe is connected with the upper water cavity and the lower water cavity through a high-pressure water inlet pipe.

[0013] A further improvement of the utility model is that the water return system comprises a trench, a vortex well and a water purifier which are arranged in sequence, and the outlet end of the water purifier is connected to the clean circulating water pool through a delivery pump.

[0014] The beneficial effects of the utility model are:

[0015] The utility model provides a high-pressure water descaling device for hot-rolled ribbed steel bars, which uses 18MPa high-pressure water to perform high-pressure blowing on the surface of the ribbed steel bars to remove the iron oxide produced on the surface of the ribbed steel bars. The loose iron oxide scale can be peeled off by the high-pressure water, and the iron oxide scale swept off can be directly flushed into the ditch and recycled as descaling water after impurities are removed. By controlling the water spraying angle of the water hole, the spraying angle of the high-pressure water is gradually changed. When the ribbed steel bars pass through, they receive high-pressure water sprayed at different angles. The high-pressure water first shovels up the iron oxide scale, and then slowly lifts and peels off the iron oxide scale through the water hole blowing, so that the removal is more thorough. At the same time, multiple water spraying angles are used at the same time to remove the dead corners of the transverse ribs and longitudinal ribs of the ribbed steel bars to the maximum extent, ensuring thorough descaling and providing a guarantee for the next use of the ribbed steel bars.

[0016] The water supply system and the water return system of the utility model fully separate and reuse the descaling water, collect the iron oxide precipitate and reuse it, and recycle the sewage after treatment, so as to realize the full utilization of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the overall structure connection flow chart of the utility model;

[0018] Figure 2 It is a side view structural diagram of the descaling box;

[0019] Figure 3 It is a structural schematic diagram of the inlet end of the descaling box;

[0020] Figure 4 is a schematic diagram of the angle α.

[0021] In the figure: 1. descaling box, 1-1. upper box body, 1-2. lower box body, 1-3. upper partition, 1-4. lower partition, 1-5. upper water chamber, 1-6. lower water chamber, 1-7. water hole, 1-8. fastening bolt, 1-9. high-pressure water inlet pipe, 1-10. bell mouth, 1-11. conveying channel, 2. trench, 3. vortex well, 4. water purification device, 5. conveying pump, 6. clean circulating water pool, 7. water supply pump, 8. filter, 9. compressor, 10. high-pressure water main pipe, 11. ribbed steel bars. DETAILED DESCRIPTION

[0022] The utility model will be further described below in conjunction with the accompanying drawings.

[0023] A high pressure water descaling device for hot rolled ribbed steel bars, such as Figure 1~Figure 4 As shown, it includes a descaling box 1 arranged along the rolling direction of the ribbed steel bar 11, and a water supply system and a water return system connected to the descaling box 1.

[0024] The descaling box 1 is a rectangular box with openings at both ends, and ribbed steel bars 11 pass through the inside of the descaling box 1. The descaling box 1 is formed by an upper box 1-1 and a lower box 1-2 being fastened together after being relatively buckled. Specifically, the upper box 1-1 and the lower box 1-2 are both U-shaped boxes, and an upper partition 1-3 is arranged below the top plate of the upper box 1-1, so that an upper water chamber 1-5 is formed between the top plate and the upper partition 1-3, and symmetrically, a lower partition 1-4 is arranged above the bottom plate of the lower box 1-2, so that a lower water chamber 1-6 is formed between the bottom plate and the lower partition 1-4. The upper water chamber 1-5 and the lower water chamber 1-6 are both closed chambers with sealed ends, and the upper water chamber 1-5 and the lower water chamber 1-6 are both connected to the high-pressure water inlet pipe 1-9. The upper partition 1-3 and the lower partition 1-4 are symmetrically provided with a plurality of water holes 1-7, which are all inclined water holes 1-7 pointing to the incoming direction of the ribbed steel bars 11. After high-pressure water enters the upper water chamber 1-5 and the lower water chamber 1-6 through the high-pressure water inlet pipe 1-9, it is quickly sprayed out through the water holes 1-7 to blow away the oxidized iron scale on the surface of the ribbed steel bars 11.

[0025] The upper box body 1-1 and the lower box body 1-2 are both made of thick-walled cast steel, and are fastened by multiple high-strength fastening bolts 1-8 evenly distributed along the length direction after being buckled, so as to form a closed channel for the ribbed steel bars 11. The split structure is adopted to avoid the maintenance difficulties caused by the entanglement and steel accumulation of multiple ribbed steel bars 11 during travel; when steel accumulation occurs inside the descaling box 1, the high-strength fastening bolts 1-8 can be unscrewed to open the upper box body 1-1, and the ribbed steel bars 11 can be cleaned manually.

[0026] Preferably, in order to ensure the sealing of the buckling of the upper box 1-1 and the lower box 1-2, the upper edge of the lower box 1-2 is set to a groove structure (not shown in the drawings) that can be embedded in the lower edge of the upper box 1-1, and the groove structure is clearance-matched with the lower edge of the upper box 1-1, and the groove depth of the groove structure is not less than 2 to 3 times the thickness of the lower edge of the upper box 1-1. When buckling, first insert the lower edge of the upper box 1-1 into the groove structure of the upper edge of the lower box 1-2, and then fix it with high-strength fastening bolts 1-8.

[0027] In order to laterally constrain and smooth the horizontally arranged multiple ribbed steel bars 11 so that they can smoothly enter the descaling box 1, the inlet end of the descaling box 1 is connected to a trumpet mouth 1-10 which is larger at the front and smaller at the back, which is used to laterally constrain the multiple ribbed steel bars 11 and feed them into the box.

[0028] In order to improve the descaling effect of the parallel steel bars, the water holes are arranged in multiple groups in the width direction of the descaling box 1, and the number of water outlet groups is consistent with the ribbed steel bars 11 to be descaled. In the actual transportation process, the parallel multiple ribbed steel bars 11 mostly appear in a mutually abutting form, and the multiple water holes arranged transversely can cover the ribbed steel bars 11 in the width direction.

[0029] Since the ribs on the surface of the ribbed steel bar 11 are irregular rib-shaped structures protruding outward, in order to ensure that all parts of the rib surface can contact the high-pressure water and complete the full descaling, the angle α between the water holes 1-7 and the vertical direction gradually increases in an arithmetic progression along the direction of travel of the ribbed steel bar 11, and the high-pressure water is sprayed out in sequence at different angles to fully sweep the parts of the surface ribs with different curvatures to ensure that the oxidized iron scale on the rib surface is completely removed. The angle α is usually in the range of 0°~45°, wherein the angle α of the frontmost water hole 1-7 is preferably 0°~5°, and the angle α of the rearmost water hole 1-7 is preferably 40°~45°.

[0030] Generally speaking, in order to ensure the stability of the pressure of the high-pressure descaling water sprayed along the length direction of the descaling box 1 , two or three high-pressure water inlet pipes 1 - 9 are provided and evenly distributed along the length direction of the descaling box 1 .

[0031] Preferably, the length of the descaling box 1 is 1.5m~2m, and the diameter of the water holes 1-7 is 4mm~6mm.

[0032] The water supply system is used to provide descaling high-pressure water with a pressure of 18MPa to the upper water chamber 1-5 and the lower water chamber 1-6. The water supply system includes a clean circulating water tank 6, a water supply pump 7, a compressor 9 and a high-pressure water main pipe 10, and the high-pressure main pipe is connected to the upper water chamber 1-5 and the lower water chamber 1-6 through a high-pressure water inlet pipe 1-9. The descaling water is stored in the clean circulating water tank 6, pressurized to about 2.5MPa by the water supply pump 7, and then compressed to 18MPa by the compressor 9, and then transported to the vicinity of the descaling box 1 through the high-pressure water main pipe 10, and then connected to the upper water chamber 1-5 / lower water chamber 1-6 through a plurality of branched high-pressure water inlet pipes 1-9, and then sprayed out from the water hole 1-7.

[0033] In order to ensure the cleanliness of the descaling high-pressure water and prevent the descaling high-pressure water from introducing new impurities to the surface of the ribbed steel bar 11, a filter 8 is further arranged between the water supply pump 7 and the compressor 9.

[0034] The water return system is used to collect and purify the dephosphorization wastewater. The water return system includes a ditch 2, a vortex well 3, and a water purification processor 4. The vortex well 3 is used to separate and collect the iron oxide contained in the descaling water for later use; the water purification processor 4 is used to remove mud and oil from the sewage. The outlet end of the water purification processor 4 is connected to the clean circulating water pool 6 through a delivery pump 5. In the clean circulating water pool 6, the sewage is further settled and impurities are removed.

[0035] The embodiments described above are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A high-pressure water descaling device for hot-rolled ribbed steel bars, characterized in that: The invention comprises a descaling box (1) arranged along the rolling direction of ribbed steel bars (11), and a water supply system and a water return system connected to the descaling box (1); the descaling box (1) is a rectangular box body with openings at both ends, a conveying channel (1-11) for the ribbed steel bars (11) to pass through is arranged in the middle, an upper partition (1-3) is arranged above the conveying channel (1-11), and an upper water cavity (1-5) is formed between the upper partition (1-3) and the top plate of the descaling box (1), and the conveying channel (1-11) is provided with a plurality of water supply channels (1-5) connected to the descaling box (1). A lower baffle (1-4) is arranged below the channel (1-11), and a lower water chamber (1-6) is formed between the lower baffle (1-4) and the bottom plate of the descaling box (1), and the upper water chamber (1-5) and the lower water chamber (1-6) are respectively connected to a high-pressure water inlet pipe (1-9); a plurality of water holes (1-7) are provided on the upper baffle (1-3) and the lower baffle (1-4) along the length direction, and the water holes (1-7) are all inclined water holes (1-7) pointing in the direction of the incoming material of the ribbed steel bars (11).

2. A high-pressure water descaling device for hot-rolled ribbed steel bars according to claim 1, characterized in that: The descaling box (1) is formed by relatively buckling an upper box body (1-1) and a lower box body (1-2) and fastening them with a plurality of high-strength fastening bolts (1-8).

3. A high-pressure water descaling device for hot-rolled ribbed steel bars according to claim 2, characterized in that: The angle α between the water holes (1-7) and the vertical direction gradually increases along the moving direction of the ribbed steel bar (11), and the value range of the angle α is 0° to 45°.

4. A high-pressure water descaling device for hot-rolled ribbed steel bars according to claim 3, characterized in that: The angle α of the water hole (1-7) at the front end is 0°~5°, and the angle α of the water hole (1-7) at the rear end is 40°~45°.

5. A high-pressure water descaling device for hot-rolled ribbed steel bars according to claim 3, characterized in that: The inlet end of the descaling box (1) is also provided with a bell mouth (1-10) for feeding the ribbed steel bars (11) into the descaling box (1).

6. A high-pressure water descaling device for hot-rolled ribbed steel bars according to claim 1, characterized in that: The water supply system comprises a clean circulating water pool (6), a water supply pump (7), a compressor (9) and a high-pressure water main pipe (10) which are arranged in sequence. The high-pressure water main pipe (10) is connected to an upper water chamber (1-5) and a lower water chamber (1-6) via a high-pressure water inlet pipe (1-9).

7. The high-pressure water descaling device for hot-rolled ribbed steel bars according to claim 1, characterized in that: The water return system comprises a trench (2), a vortex well (3) and a water purification processor (4) which are arranged in sequence, and the outlet end of the water purification processor (4) is connected to a clean circulating water pool (6) via a delivery pump (5).

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