CN212121237U - High-pressure water descaling system for hot-rolled bars - Google Patents
High-pressure water descaling system for hot-rolled bars Download PDFInfo
- Publication number
- CN212121237U CN212121237U CN202020758285.6U CN202020758285U CN212121237U CN 212121237 U CN212121237 U CN 212121237U CN 202020758285 U CN202020758285 U CN 202020758285U CN 212121237 U CN212121237 U CN 212121237U
- Authority
- CN
- China
- Prior art keywords
- descaling
- pressure
- heating furnace
- box
- rolling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Metal Rolling (AREA)
- Forging (AREA)
Abstract
A high-pressure water descaling system for hot-rolled bars comprises two sets of descaling systems, namely a rear heating furnace descaling system and a rolling line descaling system; the rear descaling box of the heating furnace is provided with a descaling box after the heating furnace is discharged from a roller way, steel billets are descaled on four sides, a plurality of rows of waterproof chains are added to prevent water splashing facilities towards the door of the heating furnace, and a bidirectional blank feeding and discharging design is adopted during the design of an inlet and outlet guide of the descaling box, so that the backing and collision avoidance are effectively avoided; the rolling line descaling system is similar to a heating furnace post-descaling system and comprises a butterfly valve, an automatic cleaning filter, a pressure sensor, an electromagnetic flowmeter, a water pressure gauge, an expansion joint, a high-pressure pump, a high-pressure hose, a high-pressure single stop valve, a descaling injection valve, a medium rolling descaling box, a finish rolling descaling box and a reducing diameter descaling box; the utility model discloses a 2 sets of descaling systems have that water supply capacity is big, the descaling is effectual, the investment is low, equipment working costs is low, the equipment maintenance volume is little, advantage such as maintenance cost is low.
Description
Technical Field
The utility model relates to a hot rolling rod production technical field, concretely relates to hot rolling rod water under high pressure descaling system.
Background
On a hot rolling bar production line, a steel billet is rapidly oxidized in a heating furnace under a high temperature condition, and a layer of primary oxidized iron sheet with the thickness of 7.5-15 mu m is formed on the surface of the steel billet. Meanwhile, in the transportation and rolling processes of the heated billet, the surface of the billet and moisture and oxygen in the air can form secondary oxide scales. Therefore, the scale on the surface of the billet must be removed before the billet is rolled, otherwise, a large amount of the scale with higher hardness is attached to the surface of the billet, so that the deformation resistance of the billet is increased, and the rolling cost and the power consumption are increased. Meanwhile, the residual iron scale can be pressed into the surface of the billet in the rolling process, so that the defects of iron scale pressing, pockmarks, scars and the like are formed, and the surface quality of the billet is seriously influenced. The high-pressure water descaling technology for removing the scale by utilizing the mechanical impact force of high-pressure water is the most popular and effective method in the prior art. Therefore, at present, in a bar production line, a plurality of descaling processes are divided into furnace descaling and rolling line descaling. However, the existing descaling system in production has many problems, such as complex structure, high cost, difficult maintenance, poor descaling effect, etc. Therefore, the surface quality of the hot rolled steel bar needs to be improved, and an efficient and stable high-pressure water descaling system needs to be designed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a high-efficient, stable water under high pressure descaling system and descaling method.
The technical scheme of the utility model:
a high-pressure water descaling system for hot-rolled bars comprises two sets of descaling systems, namely a rear heating furnace descaling system and a rolling line descaling system; the rear descaling system of the heating furnace comprises a butterfly valve, an automatic cleaning filter, a pressure sensor, an electromagnetic flowmeter, a water pressure meter, an expansion joint, a high-pressure pump, a high-pressure hose, a high-pressure single stop valve, a descaling injection valve and a rear descaling box of the heating furnace; the high-pressure pump supplies pressure to the high-pressure pump through a pressure switch, a pneumatic triple piece, a quick exhaust valve and a cylinder, and meanwhile, the high-pressure pump is also provided with a lubricating system which comprises a gear oil pump, an oil filter, a stop valve, a cooler and an oil pressure sensor and continuously supplies a lubricating effect to the high-pressure pump; the rear descaling box of the heating furnace is provided with a descaling box after the heating furnace is discharged from a roller way, steel billets are descaled on four sides, a plurality of rows of waterproof chains are added to prevent water splashing facilities towards the door of the heating furnace, and a bidirectional blank feeding and discharging design is adopted during the design of an inlet and outlet guide of the descaling box, so that the backing and collision avoidance are effectively avoided; the descaling box has the structure that an upper semicircular ring and a lower semicircular ring are separated, the upper semicircular ring can be driven by an electric elevator to move up and down, the lifting displacement is automatically controlled by a steel signal, and the lower semicircular descaling ring is connected by a hard pipe and is directly fixed; the descaling box of the heating furnace is provided with two groups of descaling rings, the descaling rings are provided with a nozzle anti-collision guide device and blank return guide anti-collision, and the two groups of descaling rings are independently switched and automatically switched; the rolling line descaling system is similar to a heating furnace post-descaling system and comprises a butterfly valve, an automatic cleaning filter, a pressure sensor, an electromagnetic flowmeter, a water pressure gauge, an expansion joint, a high-pressure pump, a high-pressure hose, a high-pressure single stop valve, a descaling injection valve, a medium rolling descaling box, a finish rolling descaling box and a reducing size descaling box.
The descaling system of the heating furnace is provided with 4 plunger type high-pressure pumps (3 for 1), 3 frequency converters, 3 PLC control cabinets, ten power distribution cabinets, 2 sets of self-cleaning filters (1 for 1), one set of descaling boxes (with 2 sets of descaling rings) and realizes automatic switching through electric control; the rolling line descaling system is provided with 3 plunger type high-pressure pumps (2 for 1), ten 3 frequency converters, 1PLC control cabinet, one power distribution cabinet, 2 self-cleaning filters (1 for 1), ten 3 sets of descaling boxes, 1 descaling pump working water supply is independently adopted in medium rolling, 1-combination descaling pump working water supply is jointly adopted for two descaling points of finish rolling and KOCKS, each point is controlled to be opened and closed through 2 descaling jet valves, and the rest 1 pump is used as a standby pump and can be switched to any two sides for standby through 2 high-pressure manual stop valves.
The utility model discloses a theory of operation:
a water source enters the automatic cleaning filter through a butterfly valve to filter impurities in water, so that the quality of the supplied water is ensured to be within a specified range; the descaling principle is that on one hand, the scale on the surface is mechanically descaled by utilizing the rapid cooling of water and the temperature difference between the scale and the billet body, and on the other hand, the scale on the surface of the billet is removed by the striking force generated by high-pressure water. The working water source (0.2-0.6 MPa) is connected to the self-cleaning filter through the water inlet main valve and then distributed to each high-pressure pump through the low-pressure main pipeline from the outlet of the filter. The water inlet branch pipes of the high-pressure pumps are connected to the high-pressure pumps through the low-pressure butterfly valves and the expansion joints, and due to the reciprocating motion of the high-pressure pumps and the opening and closing of the liquid inlet and outlet valves, water on the high-pressure pipelines is subjected to the resistance of the nozzles, and the water on the pipelines establishes pressure, and the high-pressure water can only pass through the high-pressure one-way stop valve and the high-pressure pipelines to the descaling rings and is ejected to steel billets through the nozzles to remove oxide layers on the surfaces of the steel billets because the check valves.
The utility model has the advantages that: 2 sets of descaling systems are adopted, and 4 descaling points are counted, so that the descaling system has the advantages of large water supply capacity, good descaling effect, low investment, low equipment operation cost, small equipment maintenance amount, low maintenance cost and the like; the utility model discloses a hot rolling rod water under high pressure descaling system and descaling method intelligent degree height, safety and stability are reliable.
Drawings
FIG. 1 is a flow chart of a hot rolled bar high pressure water descaling system and a descaling method.
FIG. 2 is a schematic diagram of the connection of the descaling system at the rear of the heating furnace.
FIG. 3 is a schematic diagram of the equipment connection of the rolling line descaling system.
FIG. 4 is a view showing the structure of a rear descaling box of a heating furnace.
FIG. 5 is a schematic diagram showing the separation of the descaling rings in the descaling box after the heating furnace.
In the figure: 1-butterfly valve, 2-automatic cleaning filter, 3-pressure sensor, 4-electromagnetic flowmeter, 5-water pressure gauge, 6-expansion joint, 7-high pressure pump, 8-high pressure hose, 9-high pressure single stop valve, 10-descaling injection valve, 11-heating furnace rear descaling box, 12-high pressure valve, 13-medium rolling descaling box, 14-fine rolling descaling box, 15-reducing sizing descaling box, 71-pressure switch, 72-pneumatic triple piece, 73-quick exhaust valve, 74-cylinder, 75-gear oil pump, 76-oil filter, 77-stop valve, 111-waterproof chain, 112-descaling ring.
Detailed Description
The present invention will be further explained with reference to the drawings and the embodiments.
A high-pressure water descaling system for hot-rolled bars comprises two sets of descaling systems, namely a rear heating furnace descaling system and a rolling line descaling system; the rear descaling system of the heating furnace comprises a butterfly valve (1), an automatic cleaning filter (2), a pressure sensor (3), an electromagnetic flowmeter (4), a water pressure meter (5), an expansion joint (6), a high-pressure pump (7), a high-pressure hose (8), a high-pressure single stop valve (9), a descaling injection valve (10) and a rear descaling box (11) of the heating furnace; the high-pressure pump supplies pressure to the high-pressure pump through a pressure switch (71), a pneumatic triple piece (72), a quick exhaust valve (73) and a cylinder (74), and meanwhile, the high-pressure pump is also provided with a lubricating system which comprises a gear oil pump (75), an oil filter (76), a stop valve (77), a cooler (78) and an oil pressure sensor and continuously supplies a lubricating effect to the high-pressure pump; the rear descaling box of the heating furnace is provided with a descaling box after the heating furnace is discharged from a furnace roller way, the four sides of a billet are descaled, and the descaling speed, pressure and flow of the descaling box of the heating furnace can be set according to the sizes of different blanks; the rear descaling box of the heating furnace is optimally arranged by adopting an internal baffle structure, a plurality of rows of waterproof chains (111) are added to prevent water splashing facilities towards the door of the heating furnace, and the two-way feeding and discharging design is adopted during the inlet and outlet guide design of the descaling box, so that the backing and collision avoidance are effectively avoided; the structure of a descaling ring (112) of the descaling box is that an upper semi-circular ring and a lower semi-circular ring are separated, the upper semi-circular ring can be driven by an electric lifter to move up and down, the lifting displacement is automatically controlled by a steel signal, and the lower semi-circular descaling ring is connected by a hard pipe and is directly fixed; the descaling box of the heating furnace is provided with two groups of descaling rings, the descaling rings are provided with a nozzle anti-collision guide device and blank return guide anti-collision, and the two groups of descaling rings are independently switched and automatically switched; the rolling line descaling system comprises a butterfly valve (1), an automatic cleaning filter (2), a pressure sensor (3), an electromagnetic flowmeter (4), a water pressure meter (5), an expansion joint (6), a high-pressure pump (7), a high-pressure hose (8), a high-pressure single stop valve (9), a descaling injection valve (10), a high-pressure valve (12), a medium rolling descaling box (13), a finish rolling descaling box (14) and a reducing and sizing descaling box (15); the high-pressure pump provides pressure for the high-pressure pump through a pressure switch (71), a pneumatic triple piece (72), a quick exhaust valve (73) and a cylinder (74), and meanwhile, the high-pressure pump is further provided with a lubricating system which comprises a gear oil pump (75), an oil filter (76), a stop valve (77), a cooler (78) and an oil pressure sensor and continuously provides a lubricating effect for the high-pressure pump.
Example 1:
the method comprises the steps of heating a square billet with the size of 280mm multiplied by 6000mm by a heating furnace, and then passing the heated billet through a high-pressure water descaling device behind the furnace to remove iron oxide scales on the surface of the billet. The descaled square billets are fed into a front 6-frame roughing mill set which is arranged horizontally and vertically in an alternating mode for torsion-free micro-tension rolling, then are fed into an input roller way of a middle mill set through ground, a high-pressure water descaling device is arranged in front of the middle mill set and used for removing secondary iron scales, and after secondary descaling, the rolled pieces are subjected to head cutting and tail cutting through a No. 1 flying shear and then enter the 6-frame roughing mill set which is arranged horizontally and vertically in the alternating mode for torsion-free micro-tension rolling. The high-pressure water descaling device is arranged in front of the pre-finishing rolling unit and used for removing secondary iron scales, rolled pieces which are discharged from the intermediate rolling unit are subjected to descaling, are subjected to head cutting and tail cutting by a No. 2 flying shear and then enter a 4-frame pre-finishing rolling unit which is horizontally and vertically and alternately arranged for non-torsion micro-tension rolling. The rolled piece from the finishing mill group enters a water cooling box for cooling according to the process requirements, is subjected to temperature equalization in the roller way conveying process, is subjected to descaling on secondary oxidized iron scale by a descaling device, is subjected to head cutting by a 4# flying shear and tail cutting, and then enters a reducing sizing mill group with combined extension and sizing functions for torsion-free micro-tension rolling.
The descaling system of the heating furnace is provided with 4 plunger type high-pressure pumps (3 for 1), 3 frequency converters, 3 PLC control cabinets, ten power distribution cabinets, 2 sets of self-cleaning filters (1 for 1), one set of descaling boxes (with 2 sets of descaling rings) and realizes automatic switching through electric control; the rolling line descaling system is provided with 3 plunger type high-pressure pumps (2 for 1), ten 3 frequency converters, 1PLC control cabinet, one power distribution cabinet, 2 self-cleaning filters (1 for 1), ten 3 sets of descaling boxes, 1 descaling pump working water supply is independently adopted in medium rolling, 1-combination descaling pump working water supply is jointly adopted for two descaling points of finish rolling and KOCKS, each point is controlled to be opened and closed through 2 descaling jet valves, and the rest 1 pump is used as a standby pump and can be switched to any two sides for standby through 2 high-pressure manual stop valves.
The process comprises the following steps:
(1) the descaling box at the back of the heating furnace descales, 20 sets of descaling nozzles are arranged, 5 nozzles are arranged on each surface, the spraying distance is 125mm, and the forward inclination angle is 15 degrees.
(2) And (2) descaling at the medium rolling descaling point, arranging two sets of descaling rings, designing 3 nozzles on each surface of each rectangular structural ring, and totally 12 nozzles (3 nozzles are designed on each surface of each rectangular structural ring, and totally 12 nozzles in an annular structure are distributed), wherein the spraying distance is 120mm, and the forward inclination angle is 15 degrees.
(3) And (3) carrying out finish rolling descaling point descaling, designing a set of descaling rings, wherein the number of nozzles is 6, the spraying distance is 110 mm, and the forward inclination angle is 15 degrees.
(4) A set of descaling rings is designed for descaling at the KOCKS descaling point, the number of nozzles is 6, the spraying distance is 110 mm, and the forward inclination angle is 15 degrees.
Example 2:
after being heated by a heating furnace, a square billet with the size of 150mm multiplied by 12000mm passes through a high-pressure water descaling device behind the furnace, and the scale on the surface of the billet is removed. The descaled square billets are fed into a front 6-frame roughing mill set which is arranged horizontally and vertically in an alternating mode for torsion-free micro-tension rolling, then are fed into an input roller way of a middle mill set through ground, a high-pressure water descaling device is arranged in front of the middle mill set and used for removing secondary iron scales, and after secondary descaling, the rolled pieces are subjected to head cutting and tail cutting through a No. 1 flying shear and then enter the 6-frame roughing mill set which is arranged horizontally and vertically in the alternating mode for torsion-free micro-tension rolling. The high-pressure water descaling device is arranged in front of the pre-finishing rolling unit and used for removing secondary iron scales, rolled pieces which are discharged from the intermediate rolling unit are subjected to descaling, are subjected to head cutting and tail cutting by a No. 2 flying shear and then enter a 4-frame pre-finishing rolling unit which is horizontally and vertically and alternately arranged for non-torsion micro-tension rolling. The rolled piece from the finishing mill group enters a water cooling box for cooling according to the process requirements, is subjected to temperature equalization in the roller way conveying process, is subjected to descaling on secondary oxidized iron scale by a descaling device, is subjected to head cutting by a 4# flying shear and tail cutting, and then enters a reducing sizing mill group with combined extension and sizing functions for torsion-free micro-tension rolling. The process comprises the following steps:
(1) the descaling box at the back of the heating furnace descales, 12 sets of descaling nozzles are arranged, each surface is provided with 3 nozzles, the spraying distance is 120mm, and the forward inclination angle is 15 degrees.
(2) And (3) descaling at a medium-rolling descaling point, arranging two sets of descaling rings, distributing 12 nozzles in an annular structure, wherein the spraying distance is 120mm, and the forward inclination angle is 15 degrees.
(3) And (3) carrying out finish rolling descaling point descaling, designing a set of descaling rings, wherein the number of nozzles is 6, the spraying distance is 110 mm, and the forward inclination angle is 15 degrees.
(4) A set of descaling rings is designed for descaling at the KOCKS descaling point, the number of nozzles is 6, the spraying distance is 110 mm, and the forward inclination angle is 15 degrees.
Claims (2)
1. The utility model provides a hot rolling rod water under high pressure descaling system which characterized in that: the device comprises two sets of descaling systems, namely a rear heating furnace descaling system and a rolling line descaling system; the rear descaling system of the heating furnace comprises a butterfly valve, an automatic cleaning filter, a pressure sensor, an electromagnetic flowmeter, a water pressure meter, an expansion joint, a high-pressure pump, a high-pressure hose, a high-pressure single stop valve, a descaling injection valve and a rear descaling box of the heating furnace; the high-pressure pump supplies pressure to the high-pressure pump through a pressure switch, a pneumatic triple piece, a quick exhaust valve and a cylinder, and is also provided with a lubricating system, wherein the lubricating system comprises a gear oil pump, an oil filter, a stop valve, a cooler and an oil pressure sensor and continuously supplies a lubricating effect to the high-pressure pump; the rear descaling box of the heating furnace is provided with a descaling box for four-side descaling of the billet after the heating furnace is discharged from the furnace roller way; the descaling box is additionally provided with a plurality of rows of waterproof chains to prevent water splashing facilities towards the door of the heating furnace, and the two-way feeding and discharging design is adopted during the design of the inlet and outlet guides of the descaling box to effectively avoid back collision; the descaling box has the structure that an upper semicircular ring and a lower semicircular ring are separated, the upper semicircular ring can be driven by an electric elevator to move up and down, the lifting displacement is automatically controlled by a steel signal, and the lower semicircular descaling ring is connected by a hard pipe and is directly fixed; the descaling box of the heating furnace is provided with two groups of descaling rings, the descaling rings are provided with a nozzle anti-collision guide device, a blank is returned to the furnace to be guided to be anti-collision, and the two groups of descaling rings are independently switched to be automatically switched.
2. The system of claim 1, wherein the system comprises: the rolling line descaling system comprises a butterfly valve, an automatic cleaning filter, a pressure sensor, an electromagnetic flowmeter, a water pressure meter, an expansion joint, a high-pressure pump, a high-pressure hose, a high-pressure single stop valve, a descaling injection valve, a medium rolling descaling box, a finish rolling descaling box and a reducing sizing descaling box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020758285.6U CN212121237U (en) | 2020-05-10 | 2020-05-10 | High-pressure water descaling system for hot-rolled bars |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020758285.6U CN212121237U (en) | 2020-05-10 | 2020-05-10 | High-pressure water descaling system for hot-rolled bars |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212121237U true CN212121237U (en) | 2020-12-11 |
Family
ID=73694550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020758285.6U Active CN212121237U (en) | 2020-05-10 | 2020-05-10 | High-pressure water descaling system for hot-rolled bars |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212121237U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113210445A (en) * | 2021-05-17 | 2021-08-06 | 山东绿钢环保科技股份有限公司 | Descaling system for long metal products |
-
2020
- 2020-05-10 CN CN202020758285.6U patent/CN212121237U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113210445A (en) * | 2021-05-17 | 2021-08-06 | 山东绿钢环保科技股份有限公司 | Descaling system for long metal products |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106180192B (en) | A kind of wire and rod continuous casting billet high speed direct sending directly rolls system and method | |
| CN102247981B (en) | Structural steel rolling production line and production process thereof | |
| CN100376336C (en) | Ultrafast cooling device for wire and rod hot rolling production line | |
| CN103480647A (en) | Device and method for manufacturing reinforcing steel bars by means of directly rolling small square billets at low temperatures without heating | |
| CN212121237U (en) | High-pressure water descaling system for hot-rolled bars | |
| CN102274864B (en) | Ultrafast cooling technology-based cooling-after-rolling system | |
| CN106216393A (en) | A kind of reversible mill with remaining liquid rapid purging device | |
| CN106513435A (en) | Mould flat steel continuous reversible rolling machine unit and mould flat steel rolling method | |
| CN111495992A (en) | High-pressure water descaling system and descaling method for hot-rolled bar | |
| CN110586662B (en) | Full-flow program-controlled rolling and cooling production line for bars | |
| CN111822519A (en) | Cold continuous rolling mill roller cooling control system | |
| CN205732313U (en) | Intermediate blank quickly cooling device | |
| CN201744506U (en) | Controllable hot-rolled strip steel laminar cooling device shaped like cooling panel | |
| CN112296103B (en) | Cooling process of hot rolled steel plate | |
| CN104399748B (en) | A kind of production technology that can replace conventional broadband steel hot continuous rolling | |
| CN106513448A (en) | Finish rolling descaling method of strip steel | |
| CN103029010B (en) | A kind of compact production technology of metal plate and belt is arranged | |
| CN101700532A (en) | Method and device for removing inner surface oxidized iron sheet of steel pipe on line | |
| CN217615576U (en) | Upper header cleaning device for hot continuous rolling laminar cooling | |
| CN114850233B (en) | Hot-rolled billet rough rolling descaling method | |
| CN102371284A (en) | Dual-descaling method for hot rolling strip steel slab | |
| CN215713211U (en) | Steel pipe sprays quenching system | |
| CN105964710A (en) | High pressure water descaling device and descaling method | |
| CN211866176U (en) | Be used for hot continuous rolling apparatus for producing of stainless steel JM2 steel grade | |
| CN109719146B (en) | Efficient descaling method for high-surface-quality medium plate product |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |