After-moderate-thickness-plate-rolling ultra-fast cooling device
An ultra-fast cooling and cooling device technology, which is applied in the cooling field of steel rolling, can solve the problems that affect the heat transfer efficiency, and the jet cooling water cannot break through the accumulated water layer, etc., so as to increase the heat transfer efficiency, avoid adverse effects, and ensure symmetrical distribution. Effect
Active Publication Date: 2014-04-23
NORTHEASTERN UNIV
View PDF7 Cites 4 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, if the "soft water seal" is improperly designed, a large amount of residual water will accumulate before the "soft water seal", which will prevent the jet cooling water from breaking through the accumulated water layer and affect the heat transfer efficiency
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0021] Take the production of low-cost Q345B in a domestic steel factory as an example.
[0022] Process parameters and cooling procedures
[0023] The thickness of the steel billet is 220mm, the starting rolling temperature is 860~870°C, rolling 6 passes, the thickness of the steel plate after rolling is 18mm, the final rolling temperature is 820~830°C, and the target final cooling temperature according to the process requirements is 550°C. The control model sets the height of the upper header frame as H=H 0 +Δh=300+18=318mm, and set the corresponding cooling procedures as shown in Table 1.
[0024] Table 1 Flow rate and opening state of each header
[0025]
[0026] temperature result
[0027] Use the final cooling temperature actually collected by the thermometer on site to draw the temperature curve of the upper and lower surfaces of the steel plate after cooling, as shown in Figure 5 shown.
[0028] Depend on Figure 5 It can be seen that the actual final coolin...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses an after-moderate-thickness-plate-rolling ultra-fast cooling device. Included angles between the forward / backward upper collecting pipe jet flow directions of the ultra-fast cooling device and the surface of a moderate-thickness plate are both theta; Included angles between forward / backward jet flow lower collecting pipes and the surface of the moderate-thickness plate are both phi; a spraying area formed by a forward upper collecting pipe and a backward jet flow upper collecting pipe which are adjacent on the upper surface of a steel plate is symmetrical with a spraying area formed by the forward jet flow lower collecting pipe and the backward jet flow lower collecting pipe which are adjacent on the lower surface of the steel plate, and the condition of a formula (please see the specifications for the formula) is met, wherein L is the distance between the forward upper collecting pipe and the backward upper collecting pipe, l is the distance between the forward lower collecting pipe and the backward lower collecting pipe, H is the vertical distances between water outlets of the upper collecting pipes and the upper surface of the moderate-thickness plate, and h is the vertical distances between water outlets of the lower collecting pipes and the lower surface of the moderate-thickness plate. According to the after-moderate-thickness-plate-rolling ultra-fast cooling device, coupling symmetrical distribution is achieved by reasonably designing every two adjacent slant spraying collecting pipes of the ultra-fast cooling device, and the adverse effect of the irreducible water is effectively avoided.
Description
technical field [0001] The invention relates to the technical field of cooling of rolled steel, in particular to a novel ultra-rapid cooling header device for medium and heavy plates after rolling with inclined symmetrical design. Background technique [0002] In recent years, the development of controlled cooling technology after plate rolling and the huge benefits brought by it have been widely concerned by people. With the research and development of high-quality products, the requirements for the cooling process are more stringent. Lower final cooling temperature and higher cooling rate help to improve the comprehensive mechanical properties of the steel plate, but the plate shape problem caused by uneven cooling is becoming more and more prominent. [0003] In the ultra-rapid cooling system, the injection headers are arranged along the rolling direction of the steel plate, and the upper and lower surfaces of the steel plate are not completely symmetrically cooled. The...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): B21B45/02
CPCY02P70/10
Inventor 王丙兴张田王昭东王国栋田勇韩毅李勇
Owner NORTHEASTERN UNIV