CN1974800A - Turbulent water cooling process and apparatus for rod product - Google Patents
Turbulent water cooling process and apparatus for rod product Download PDFInfo
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- CN1974800A CN1974800A CN 200610170743 CN200610170743A CN1974800A CN 1974800 A CN1974800 A CN 1974800A CN 200610170743 CN200610170743 CN 200610170743 CN 200610170743 A CN200610170743 A CN 200610170743A CN 1974800 A CN1974800 A CN 1974800A
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Abstract
The present invention is turbulent water cooling process and apparatus for rod product, and belongs to the field of hot rolled rod producing technology. The present invention is for the fast cooling of cut hot rolled steel rod, and the hot rolled steel rod after being cut is cooled rapidly with high pressure turbulent water flow inside one turbulent water cooling pipe. The turbulent water cooling apparatus includes one turbulent water cooling pipe and one high pressure water incoming pipe below the turbulent water cooling pipe. The present invention has high cooling efficiency, simple technological process, low power consumption and capacity of raising the mechanical performance of the rod product.
Description
Technical field
The invention belongs to hot rolled rod production technology and device field, relate in particular to and a kind of rod product is carried out rapid water cooling with the technology that improves its mechanical property and the rapid water-chilling plant of use thereof.
Background technology
In rolled steel bar, the wire production engineering,, interatomic crystalline particle size is changed, thereby change its inner metallographic structure, can reach the purpose that increases its yield strength and tensile strength if make bar cooling fast in certain temperature range.
Steel are from being sheared into the iron and steel rod product to rolling line after repressed in the process furnace, at this moment cool off fast by high-pressure cooling water, be input in the cooling bed roller again, rod product heart portion self-tempering steel temperature drops to about 820 ℃ from 1000 ℃, the crystal grain of steel obtains refinement, and mechanical property is largely increased.Existing rapid cooling process is to be applied in the cooling of continuous rolling bar, and water coolant enters along the radial direction annular of cooling vessel, and the iron and steel bar passes this cooling vessel.The device of this process for cooling is by outermost steel plate welding water tank, establishing parts such as cooling jet, water-cooled tube and contrainjector in the water tank forms, water coolant is by the annulus ejection of nozzle, water coolant is collected by cold water storage cistern, and the water port of passing through the lower end is discharged, the shortcoming of this technology and device is that water coolant radially introduced the annular cavity in the nozzle, flow resistance is big, the water coolant of nozzle annulus winding-up can't provide enough power, can't carry out sufficient heat exchange between rod product and the water coolant.
On December 11st, 2002, the Chinese patent ZL01259841.0 of bulletin provided a kind of hot rolled rod production line to wear water-chilling plant with brute force, it is by the inlet header tank, positive nozzle, water-cooled tube, support, recovery tank, contrainjector, the cleaning nozzle, the outlet header tank and in establish main water return tube base constitute, the cylindrical inlet header tank that steel sheet is welded is fixed by bolts to cantilevered fashion on the flared fingers of inlet conduits of positive nozzle, the water-cooled tube that steel pipe is made is installed in the exit end of the water conservancy diversion tapered sleeve on the positive nozzle by bolt by the ring flange of himself end, the turbulent flow cover of a plurality of change internal diameters is housed in the water-cooled tube, the turbulent flow cover adopts running fit with steel pipe, constituted and become interior gauge structure, water-cooled tube is by the stent support that is installed on the base, the recovery tank of sealing is located on the base between water-cooled tube and the contrainjector, the outlet header tank is located on contrainjector and the base of cleaning between the nozzle, the inlet header tank, the water vent of recovery tank and outlet header tank bottom extend into respectively in the prosopyle on the main water return tube top of establishing in the base.Though this device can not need to remove in the water coolant particle with regard to the reusable edible water coolant, and form turbulent by the caliber variation of water-cooled tube, but because the hypotony of water coolant, water-cooled tube is bigger to the resistance of current, need external force to promote bar, can't realize cooling off fast and efficiently by water-cooled tube.
Summary of the invention
The purpose of this invention is to provide a kind of simple in structure, rod product that cooling efficiency is high rapids cooling process and rapid water-chilling plant thereof, it can not be subjected to the influence of suspended particle in the water coolant to carry out recycle, and can promote rod product by cooling tube by turbulent water flow, realize cooling rapidly and efficiently.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of rod product rapids cooling process is used for the quick cooling of hot-rolled steel bar after finished product is sheared, and it is characterized in that described rod product is after finished product is sheared, enter in the rapid water composite cooling pipe, under the promotion of the oblique high pressure turbulent water flow that enters,, realize cooling fast by rapid water composite cooling pipe.
Described high pressure turbulent water flow promotes rod product by rapid water composite cooling pipe by oblique the entering in the below of rapid water composite cooling pipe, and the entry direction of high pressure turbulent water flow and the angle of rapid water composite cooling pipe are 45 °.
After described rod product cools off fast through a rapid water composite cooling pipe and pressurized air enter another rapid water composite cooling pipe cooling together.
The intake pressure of described high pressure turbulent water flow is a 12-16 normal atmosphere.
Adopt the rod product rapids water-chilling plant of this rod product rapids cooling process, comprise rapid water composite cooling pipe, it is characterized in that the below of rapid water composite cooling pipe is provided with oblique high-pressure intake pipe.
Described high-pressure intake pipe be arranged on rapid water composite cooling pipe under, the angle of high-pressure intake pipe and rapid water composite cooling pipe is 45 °.
Described rapid water composite cooling pipe is the even footpath of a non-resistance pipe, and the rear end of rapid water composite cooling pipe is provided with return water pipe, is connected pressure measuring tube between the front end of return water pipe and rapid water composite cooling pipe, and valve and hydraulic pressure tensimeter are set on the pressure measuring tube.
The number of described high-pressure intake pipe is 1-4, and one section cooling tube that high-pressure intake pipe connects inserts the front end of rapid water composite cooling pipe by ring flange.
The rod product import of described high-pressure intake pipe front end is provided with the import hydraucone, and the rod product outlet of its rear end is provided with the outlet hydraucone.
The high pressure turbulent water flow enters from the below of rapid water composite cooling pipe is oblique, can form strong and high-speed turbulent flow, the moisture film on rod product surface is destroyed, and promote rod product and do not having under the situation that other external force promotes fast by rapid water composite cooling pipe.It is 45 degree that the best of high pressure turbulent water flow enters angle, and the number of high-pressure intake pipe can be 1 or more, and the best is 2, goes into the water yield and flow velocity with what guarantee the high pressure turbulent water flow.High-pressure intake pipe can be weldingly fixed on two ends be provided with ring flange and with the isometrical short tube of rapid water composite cooling pipe on, insert the front end of rapid water composite cooling pipe by ring flange, both can convenient for maintaining, also convenient according to different rod product increase and decrease high-pressure feed water pipes number or change the high-pressure feed water pipe of different flooding quantitys.
Because should the rapids cooling process and the cooling efficiency height of device, therefore the speed passed through of rod product can be accelerated, and the length of rapid water composite cooling pipe can shorten simultaneously, after rod product is through two sections rapid water-chilling plant, the temperature of its heart portion can reduce about 180 ℃, and mechanical property improves greatly.End at rapid water-chilling plant is provided with return water pipe, and return water pipe is recycled to back pool with the part water coolant, can reuse.For the hydraulic pressure in the correct measurement rapids water composite cooling pipe, can valve and rapid water composite cooling pipe be set on the pressure measuring tube at the two ends of a rapid water composite cooling pipe pressure measuring tube in parallel.
Beneficial effect of the present invention is, this rod product rapids cooling process adopts the oblique high pressure turbulent water flow that enters can promote rod product again by rapid water composite cooling pipe when carrying out sufficient heat exchange with rod product, has cooling efficiency height, simple, the advantage of low energy consumption of technology; This rod product rapids water-chilling plant is simple in structure, and speed of cooling is fast, the cooling efficiency height, and treatment capacity is big, and low to the specification of quality of water coolant.This rod product rapids cooling process and rapid water-chilling plant can be widely used in the chilling of various hot-rolled steel bars and wire rod, increase substantially the mechanical property of bar.
Description of drawings
The invention will be further elaborated below in conjunction with drawings and Examples.
Fig. 1 is the cut-away section structural representation of embodiment of the invention rapids water-chilling plant;
Fig. 2 is the process structure synoptic diagram of the embodiment of the invention.
Embodiment
As figure, this rod product rapids cooling process adopts the from bottom to top oblique high pressure turbulent water flow that enters rapid water composite cooling pipe as heat-eliminating medium, and the rod product by rapid water composite cooling pipe is carried out quick cooling.After the hot-rolled steel bar is cut 9 shearings through finished product, enter rapid water composite cooling pipe, the high pressure turbulent water flow is by oblique entering under the rapid water composite cooling pipe, and the angle of its entry direction and rapid water composite cooling pipe is 45 °, promotes rod product and pass through rapid water composite cooling pipe fast along water (flow) direction when forming turbulent water flow.The water entry pressure of high pressure turbulent water flow generally is controlled at 12-16 normal atmosphere.Rod product is by behind this rapids water-chilling plant 10, enter second section rapid water-chilling plant, carry out same rapid water cooling, in order to increase the turbulent velocity on rod product surface, quicken heat exchange, when rod product enters second section rapid water-chilling plant, feed pressurized air simultaneously, can be delivered directly to cold bed delivery track 11 through second section cooled rod product of rapid water-chilling plant.
This rod product rapids water-chilling plant mainly is made up of rapid water composite cooling pipe 5, high-pressure intake pipe 7 and the return water pipe 2 in the even footpath of non-resistance, high-pressure intake pipe 7 be arranged on rapid water composite cooling pipe 5 under, the angle of high-pressure intake pipe 7 and rapid water composite cooling pipe 5 is 45 °.The rear end of rapids water composite cooling pipe is provided with return water pipe 2, is connected pressure measuring tube 3 between the front end of return water pipe 2 and rapid water composite cooling pipe, and valve 4 and hydraulic pressure tensimeter 6 are set on the pressure measuring tube 3.The number of high-pressure intake pipe is 2, and one section cooling tube that high-pressure intake pipe connects inserts the front end of rapid water composite cooling pipe by ring flange.The rod product import 8 of high-pressure intake pipe front end can be provided with the import hydraucone, and the rod product outlet of its rear end is provided with outlet hydraucone 1.
Crystal grain through this rapids cooling process and the rod product of device processing obtains uniform refinement, mechanical property is greatly improved, yield strength on average increases about 40Mpa, the mechanical property qualification rate of steel all is stabilized in more than 99.5%, when guaranteeing certain mechanical property, can reduce alloy content expensive in the starting material steel billet, the raw-material cost of indirect reduction.
Claims (9)
1. a rod product rapids cooling process is used for the quick cooling of hot-rolled steel bar after finished product is sheared, and it is characterized in that described rod product is after finished product is sheared, enter in the rapid water composite cooling pipe, under the promotion of the oblique high pressure turbulent water flow that enters,, realize cooling fast by rapid water composite cooling pipe.
2. rod product rapids cooling process according to claim 1, it is characterized in that described high pressure turbulent water flow promotes rod product by rapid water composite cooling pipe by oblique the entering in the below of rapid water composite cooling pipe, the entry direction of high pressure turbulent water flow and the angle of rapid water composite cooling pipe are 45 °.
3. rod product according to claim 1 rapids cooling process, it is characterized in that described rod product cool off fast through a rapid water composite cooling pipe after and pressurized air enter another rapid water composite cooling pipe cooling together.
4. rod product rapids cooling process according to claim 1, the intake pressure that it is characterized in that described high pressure turbulent water flow is a 12-16 normal atmosphere.
5. adopt the rod product rapids water-chilling plant of the described rod product rapids of claim 1 cooling process, comprise rapid water composite cooling pipe, it is characterized in that the below of rapid water composite cooling pipe is provided with oblique high-pressure intake pipe.
6. rod product according to claim 5 rapids water-chilling plant, it is characterized in that described high-pressure intake pipe be arranged on rapid water composite cooling pipe under, the angle of high-pressure intake pipe and rapid water composite cooling pipe is 45 °.
7. rod product rapids water-chilling plant according to claim 5, it is characterized in that described rapid water composite cooling pipe is the even footpath of a non-resistance pipe, the rear end of rapids water composite cooling pipe is provided with return water pipe, be connected pressure measuring tube between the front end of return water pipe and rapid water composite cooling pipe, valve and hydraulic pressure tensimeter are set on the pressure measuring tube.
8. rod product rapids water-chilling plant according to claim 5, the number that it is characterized in that described high-pressure intake pipe is 1-4, one section cooling tube that high-pressure intake pipe connects inserts the front end of rapid water composite cooling pipe by ring flange.
9. rod product rapids water-chilling plant according to claim 5 is characterized in that the rod product import of described high-pressure intake pipe front end is provided with the import hydraucone, and the rod product outlet of its rear end is provided with the outlet hydraucone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610170743 CN1974800A (en) | 2006-12-22 | 2006-12-22 | Turbulent water cooling process and apparatus for rod product |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610170743 CN1974800A (en) | 2006-12-22 | 2006-12-22 | Turbulent water cooling process and apparatus for rod product |
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| CN1974800A true CN1974800A (en) | 2007-06-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200610170743 Pending CN1974800A (en) | 2006-12-22 | 2006-12-22 | Turbulent water cooling process and apparatus for rod product |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104785554A (en) * | 2015-04-24 | 2015-07-22 | 合肥精工导卫配件有限责任公司 | Turbulent eddy tubulature type double-water-supply efficient water-cooling nozzle |
| CN112474831A (en) * | 2020-12-04 | 2021-03-12 | 天津钢铁集团有限公司 | Adjusting method for QTB waste heat treatment process of slit rolled deformed steel bar |
-
2006
- 2006-12-22 CN CN 200610170743 patent/CN1974800A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104785554A (en) * | 2015-04-24 | 2015-07-22 | 合肥精工导卫配件有限责任公司 | Turbulent eddy tubulature type double-water-supply efficient water-cooling nozzle |
| CN112474831A (en) * | 2020-12-04 | 2021-03-12 | 天津钢铁集团有限公司 | Adjusting method for QTB waste heat treatment process of slit rolled deformed steel bar |
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