CN210048822U - Strip steel cooling equipment and strip steel production line - Google Patents
Strip steel cooling equipment and strip steel production line Download PDFInfo
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- CN210048822U CN210048822U CN201920818526.9U CN201920818526U CN210048822U CN 210048822 U CN210048822 U CN 210048822U CN 201920818526 U CN201920818526 U CN 201920818526U CN 210048822 U CN210048822 U CN 210048822U
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Abstract
The application relates to strip steel cooling equipment and a strip steel production line, and belongs to the technical field of strip steel production lines. The cooling section stove outer covering includes the cooling chamber, first return air inlet and the second return air inlet that communicates with the cooling chamber are seted up to the cooling section stove outer covering, circulating fan's air supply end links to each other with the one end of blast pipe, circulating fan's return air end links to each other with the one end of main return air pipe, the other end of main return air pipe links to each other with first return air branch pipe and second return air branch pipe respectively, first return air branch pipe links to each other with first return air inlet, second return air branch pipe links to each other with the second return air inlet, be provided with heating device on the second return air branch pipe, heating device is used for heating the air in the second return air branch pipe. The strip steel cooling equipment and the strip steel production line solve the problem of temperature unevenness caused by the existing heating, the return air branch pipe with the heating device is added, and the air temperature of the protective air is controlled by mixing hot air and cold air, so that the accurate control of the air temperature sprayed to the surface of the strip steel is realized conveniently.
Description
Technical Field
The application relates to the technical field of strip steel production lines, in particular to strip steel cooling equipment and a strip steel production line.
Background
In the current continuous production line of strip steel, the cooling section generally adopts a mode of circularly spraying protective gas to cool the strip steel. Protective gas (nitrogen and hydrogen) in the cooling section furnace shell is pumped out by a fan, is subjected to heat exchange and cooling by a water feeding heat exchanger of an air return channel, is introduced into a spray box in the furnace through an air supply channel, and is sprayed to the upper surface and the lower surface of the strip steel from uniformly distributed spray holes on the spray box so as to achieve the purpose of cooling the strip steel. However, the capacity of the cooling section is designed according to the heavy load when thick plates are produced, so that in order to prevent the strip from being cooled too low in temperature when thin plates are produced, an electric radiant tube is arranged at the bottom of the cooling section to heat the strip.
The prior art has the following disadvantages:
1. the electric radiant tubes below the lower surface of the strip steel used in the cooling section are heated to maintain the temperature, so that the temperature field in the furnace of the cooling section is not uniformly distributed, and the temperature of the upper surface and the lower surface of the strip steel is not uniform;
2. when the circulating protective gas cools the strip steel, the electric radiant tube heats the strip steel, and the strip steel and the electric radiant tube act on the strip steel at the same time, the cooling speed of the strip steel is difficult to realize accurate control, and the furnace temperature can be detected only by a thermocouple of a cooling section to roughly judge the cooling effect. Products having precise process requirements for cooling rate are difficult to meet, resulting in reduced performance or failure of the products, and various plate shape problems.
SUMMERY OF THE UTILITY MODEL
The utility model provides a purpose is to above-mentioned problem, provides a belted steel cooling arrangement and belted steel production line, has solved the problem of the temperature inhomogeneity that current heating arouses, has increased the return air branch pipe of taking heating device, through the mixture of hot-blast and cold wind, controls the wind-warm syndrome of protective gas, is convenient for realize jetting the accurate control to the wind-warm syndrome on belted steel surface, makes above-mentioned problem obtain improving.
According to the first aspect of the application, the strip steel cooling device comprises a cooling section furnace shell, a circulating fan, an upper spray box, a lower spray box, an air supply pipe, a main air return pipe, a first air return branch pipe and a second air return branch pipe;
the cooling section stove outer covering includes the cooling chamber, first return air inlet and the second return air inlet that communicates with the cooling chamber are seted up to the cooling section stove outer covering, go up the spray box and spout the case setting down in the cooling chamber, go up the spray box and seted up first air intake, the second air intake has been seted up to the spray box down, circulating fan's air supply end links to each other with the one end of blast pipe, the other end of blast pipe links to each other with first air intake and second air intake respectively, circulating fan's return air end links to each other with the one end of main return air pipe, the other end of main return air pipe links to each other with first return air branch pipe and second return air branch pipe respectively, first return air branch pipe links to each other with first return air inlet, second return air branch pipe links to each other with the second return air inlet, be provided with heating device on the second return.
According to the strip steel cooling equipment provided by the embodiment of the application, the mixing proportion of cold air and hot air in the air return pipeline is controlled by additionally arranging the air return branch pipe with the heating device, so that the control of the air return temperature of the air return end of the circulating fan is realized, the air temperature sprayed to the surface of strip steel is accurately controlled, and the problem of uneven strip steel cooling temperature caused by the existing heating mode is solved. The strip steel cooling equipment cancels the electric radiant tube on the lower surface of the strip steel, and the control of the cooling temperature of the strip steel is more accurate.
In addition, the strip steel cooling equipment according to the embodiment of the application also has the following additional technical characteristics:
according to some embodiments of the application, a heat exchanger is disposed on the first return air branch pipe, and the heat exchanger is used for cooling air in the first return air branch pipe.
In the above embodiment, the heat exchanger is disposed on the first air return branch pipe, and performs heat exchange on the recovered shielding gas to reduce the temperature of the shielding gas, thereby facilitating the circular cooling of the strip steel.
According to some embodiments of the application, every return air inlet all is provided with the return air and takes over, and the return air is taken over and is connected with cooling zone stove outer covering detachably, and first return air branch pipe is taken over detachably with the return air of first return air inlet and is connected, and second return air branch pipe is taken over detachably with the return air of second return air inlet and is connected.
In the above embodiment, the connection of the return air inlet and the return air branch pipe is realized through the return air connecting pipe, so that the connection flexibility of the return air branch pipe and the cooling section furnace shell is improved, the assembly and the disassembly of the return air branch pipe are convenient to realize, and the maintenance efficiency is improved.
In some embodiments of the present application, the first air return branch pipe includes a first pipe section and a second pipe section that are connected, the first pipe section is a straight pipe, the second pipe section is an elbow, one end of the first pipe section, which is far away from the second pipe section, is connected to a corresponding air return connection pipe, the second air return branch pipe includes a third pipe section and a fourth pipe section that are connected, the third pipe section is a straight pipe, the heating device is located in the third pipe section, the fourth pipe section is a three-way pipe, the fourth pipe section includes a first interface, a second interface and a third interface, the first interface is connected to one end of the third pipe section, the other end of the third pipe section is connected to the second air return opening, the second interface is connected to the second pipe section, and the third interface is connected to the main air return.
In the embodiment, the first return branch pipe adopts a two-section structure, so that the space utilization rate is improved, and the installation space is saved; the structural design of the second return air branch pipe not only realizes the connection of the second return air branch pipe and the second return air inlet, but also realizes the mixing of the first return air branch pipe and the second return air branch pipe, so that the mixed protective gas enters the circulating fan through the main return air pipe, the control of the temperature of the gas supplied by the circulating fan is realized, and the control precision of the cooling temperature of the strip steel is improved.
In some embodiments of the present application, the first return air branch pipe and the second return air branch pipe are both straight pipes, the main return air pipe includes a first section, a second section and a third section which are connected in sequence, the first section is an elbow, the second section is a three-way pipe, the third section is a connecting pipe, one end of the first section is connected to the first return air branch pipe, the second section includes a first pipe interface, a second pipe interface and a third pipe interface, the first pipe interface is connected to the other end of the first section, the second pipe interface is connected to the second return air branch pipe, the third pipe interface is connected to one end of the third section, and one end of the third section, which is far away from the second section, is connected to the return air end of the circulating fan.
In the above embodiment, the first return air branch pipe and the second return air branch pipe have the same structure, which is convenient for processing and manufacturing; the main return air pipe adopts a combined mode of an elbow and a three-way pipe, so that the installation space is saved, the cold temperature protective gas of the first return air branch pipe is mixed with the high temperature protective gas of the second return air branch pipe, and the mixed protective gas enters the circulating fan, so that the air supply temperature control of the circulating fan is realized, and the accurate control of the cooling speed of the strip steel is realized.
Optionally, the first return air branch pipe is connected with the corresponding return air connecting pipe through a first regulating valve, and the second return air branch pipe is connected with the corresponding return air connecting pipe through a second regulating valve.
In the above embodiment, the first return branch pipe is connected to the return air connection pipe through the first regulating valve, so that the flow control of the cold-hot protective gas in the first return branch pipe is facilitated; the second return air branch pipe is connected with the return air connecting pipe through a second regulating valve, so that the flow control of high-temperature protective gas in the second return air branch pipe is facilitated; after the protective gas collected by the first return air branch pipe and the protective gas collected by the second return air branch pipe are mixed in the main return air pipe, the temperature of the protective gas is controlled, and therefore the air supply temperature of the circulating fan is accurately controlled.
Furthermore, a temperature detector is arranged on the blast pipe.
In the above embodiment, the temperature detector is configured to detect the temperature of the shielding gas in the air supply pipe (i.e., the air supply temperature), and adjust the first regulating valve and/or the second regulating valve according to the detected temperature, so as to control the temperature of the shielding gas in the air supply pipe.
According to some embodiments of the application, the heating device is an electric radiant tube.
In the above embodiment, the heating device adopts an electric heating mode, and the electric radiant tube is used for heating the protective gas in the second return air branch pipe, so that the protective gas can be uniformly heated, and the temperature requirement of the protective gas for the main return air pipe is met.
A strip production line according to an embodiment of the second aspect of the present application comprises a strip cooling apparatus according to an embodiment of the first aspect of the present application.
According to the strip steel production line, the strip steel cooling speed is accurately controlled through the strip steel cooling equipment, the quality of strip steel is guaranteed, and the strip steel production line is suitable for strip steel production of different specifications.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
FIG. 1 is a schematic structural diagram of a strip cooling apparatus according to an embodiment of the first aspect of the present application;
FIG. 2 is a schematic view of the strip cooling plant of FIG. 1 in the direction A;
FIG. 3 is a schematic view of a structure of the cross-sectional view taken along line B-B of FIG. 2;
fig. 4 is another structure view of a sectional view taken along the direction B-B of fig. 2.
Icon: 100-strip steel cooling equipment; 1-cooling the section furnace shell; 11-a cooling chamber; 12-a first return air opening; 13-a second air return opening; 14-return air connecting pipe; 15-a first regulating valve; 16-a second regulating valve; 2-a circulating fan; 3, an upper spray box; 31-a first air inlet; 4-lower spraying box; 41-a second air inlet; 5-blast pipe; 51-temperature detector; 6-main return air duct; 61-first stage; 62-a second segment; 621-a first tube interface; 622 — second tube interface; 623-a third pipe interface; 63-third section; 7-a first return air branch pipe; 71-a heat exchanger; 72-a first tube section; 73-a second tube section; 8-a second return air branch pipe; 81-a heating device; 82-a third tube section; 83-a fourth tube section; 831 — first interface; 832-second interface; 833 — third interface.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when using, and are only used for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Embodiments of the first aspect
A strip cooling apparatus 100 according to an embodiment of the first aspect of the present application will be described with reference to the drawings.
As shown in fig. 1, 2, 3 and 4, a strip cooling apparatus 100 according to an embodiment of the present application includes: the cooling section comprises a furnace shell 1, a circulating fan 2, an upper spray box 3, a lower spray box 4, an air supply pipe 5, a main air return pipe 6, a first air return branch pipe 7 and a second air return branch pipe 8.
Specifically, the cooling section furnace shell 1 comprises a cooling cavity 11, the cooling section furnace shell 1 is provided with a strip steel inlet and a strip steel outlet, strip steel enters the cooling cavity 11 through the strip steel inlet and is sent out from the strip steel outlet, and the strip steel completes a cooling process in the cooling cavity 11. As shown in fig. 3 and 4, the cooling section furnace shell 1 is provided with a first air return opening 12 and a second air return opening 13 which are communicated with the cooling cavity 11, and the protective gas after the strip steel is cooled is discharged through the first air return opening 12 and the second air return opening 13; the upper spray box 3 and the lower spray box 4 are arranged in the cooling cavity 11, the upper spray box 3 is provided with a first air inlet 31, the lower spray box 4 is provided with a second air inlet 41, the air supply end of the circulating fan 2 is connected with one end of the air supply pipe 5, and the other end of the air supply pipe 5 is connected with the first air inlet 31 and the second air inlet 41 respectively. When the circulating fan 2 supplies air, the protective gas can enter the upper spray box 3 and the lower spray box 4 through the first air inlet 31 and the second air inlet 41 respectively, so that the upper surface and the lower surface of the strip steel are cooled. As shown in fig. 1 and 2, the return air end of the circulating fan 2 is connected to one end of a main return air duct 6, and the other end of the main return air duct 6 is connected to a first return air branch duct 7 and a second return air branch duct 8, respectively, as shown in fig. 3 and 4, the first return air branch duct 7 is connected to a first return air inlet 12, and the second return air branch duct 8 is connected to a second return air inlet 13. After the strip steel is cooled by the low-temperature protective gas, the temperature of the protective gas is increased through the heat exchange effect, the protective gas enters the first air return branch pipe 7 and the second air return branch pipe 8 through the first air return opening 12 and the second air return opening 13 respectively, the protective gas is collected in the main air return pipe 6 through the first air return branch pipe 7 and the second air return branch pipe 8, and then the protective gas enters the circulating fan 2 for circulating cooling. The first air return branch pipe 7 is an existing air return pipeline with a heat exchange function and is used for carrying out heat exchange and cooling on the protective gas; the second return air branch pipe 8 is provided with a heating device 81 for heating the protective gas in the second return air branch pipe 8; after the high-temperature protective gas of the second return air branch pipe 8 and the low-temperature protective gas of the first return air branch pipe 7 are mixed in the main return air pipe 6, the temperature of the protective gas is neutralized, and the protective gas with the required temperature can be obtained, so that the air supply temperature of the circulating fan 2 can be controlled.
According to the strip steel cooling device 100 of the embodiment of the application, the air return branch pipe (the second air return branch pipe 8) with the heating device 81 is additionally arranged, the mixing proportion of cold air and hot air in the air return pipeline is controlled, the control of the air return temperature of the air return end of the circulating fan 2 is realized, the air temperature of the air blown to the surface of strip steel is accurately controlled, and the problem that the cooling temperature of the strip steel is uneven due to the existing heating mode is solved. The strip steel cooling device 100 eliminates the electric radiant tube on the lower surface of the strip steel, and the control of the cooling temperature of the strip steel is more accurate.
According to some embodiments of the present application, the heating device 81 is an electric radiant tube. Heating device 81 adopts the mode of electrical heating, realizes the heating to the protective gas in second return air branch pipe 8 through the electric radiant tube, can make the protective gas heating even, satisfies the protective gas's to main return air pipe 6 temperature demand. The electric heating device 81 is convenient to heat and simple to adjust.
According to some embodiments of the present application, a heat exchanger 71 is disposed on the first air return branch pipe 7, and the heat exchanger 71 is used for cooling air in the first air return branch pipe 7. The heat exchanger 71 is arranged on the first air return branch pipe 7, and heat exchange is carried out on the recovered protective gas, so that the temperature of the protective gas is reduced, and the circular cooling of the strip steel is facilitated. The heat exchanger 71 can be a water heat exchanger or an air heat exchanger, and the heat exchanger 71 can be selected according to actual conditions; when the water heat exchanger is selected, heat exchange of the recovered protective gas is realized through cooling water, and the water after heat exchange can be used for other working sections; when an air heat exchanger is selected, hot air after heat exchange is used for drying the strip steel in other working sections. After the heat exchange of the heat exchanger 71, the temperature of the protective gas is reduced, and the protective gas is pumped to the blast pipe 5 by the circulating fan 2 and sent into the upper spray box 3 and the lower spray box 4 for cooling the strip steel, so that the cyclic utilization is realized.
According to some embodiments of the present application, as shown in fig. 3 and 4, each of the return air inlets is provided with a return air connection 14, and the return air connection 14 is detachably connected to the cooling-section furnace shell 1. The first return air branch pipe 7 is detachably connected with a return air connecting pipe 14 of the first return air inlet 12, and the second return air branch pipe 8 is detachably connected with a return air connecting pipe 14 of the second return air inlet 13. The connection between the return air inlet and the return air branch pipe is realized through the return air connecting pipe 14, so that the connection flexibility of the return air branch pipe and the cooling section furnace shell 1 is improved, the assembly and the disassembly of the return air branch pipe are convenient to realize, and the maintenance efficiency is improved.
In some embodiments of the present application, as shown in fig. 3, the first air return branch pipe 7 includes a first pipe section 72 and a second pipe section 73 that are connected, the first pipe section 72 is a straight pipe, the heat exchanger 71 is located in the first pipe section 72, the second pipe section 73 is an elbow, one end of the first pipe section 72 away from the second pipe section 73 is connected to the corresponding air return connection pipe 14, and the second pipe section 73 is detachably connected to the first pipe section 72, so as to facilitate assembly and disassembly of the first air return branch pipe 7; the elbow structure of the second pipe section 73 is convenient for adapting to different installation environments, and the installation space is saved. The second return air branch pipe 8 comprises a third pipe section 82 and a fourth pipe section 83 which are connected, the third pipe section 82 is a straight pipe, the heating device 81 is located on the third pipe section 82, the fourth pipe section 83 is a three-way pipe, the fourth pipe section 83 comprises a first connector 831, a second connector 832 and a third connector 833, the first connector 831 is connected with one end of the third pipe section 82, the other end of the third pipe section 82 is connected with the second return air inlet 13, the second connector 832 is connected with the second pipe section 73, and the third connector 833 is connected with the main return air pipe 6. The third pipe section 82 realizes connection of the fourth pipe section 83 and the second air return opening 13, the fourth pipe section 83 realizes mixing of low-temperature protective gas of the first air return branch pipe 7 and high-temperature protective gas in the third pipe section 82, and the uniformly mixed protective gas enters the main air return pipe 6.
The first return air branch pipe 7 adopts a two-section structure, so that the space utilization rate is improved, and the installation space is saved; the structural design of the second return air branch pipe 8 realizes the connection between the second return air branch pipe 8 and the second return air inlet 13, and also realizes the mixing of the first return air branch pipe 7 and the second return air branch pipe 8, so that the mixed protective gas enters the circulating fan 2 through the main return air pipe 6, the control of the temperature of the gas supplied by the circulating fan 2 is realized, and the control precision of the cooling temperature of strip steel is improved.
In some embodiments of the present application, as shown in fig. 4, the first return air branch pipe 7 and the second return air branch pipe 8 are straight pipes, and the main return air pipe 6 includes a first section 61, a second section 62 and a third section 63 connected in sequence. The first section 61 is an elbow, the second section 62 is a three-way pipe, the third section 63 is a connecting pipe, one end of the first section 61 is connected with the first return air branch pipe 7, the second section 62 comprises a first pipe connector 621, a second pipe connector 622 and a third pipe connector 623, the first pipe connector 621 is connected with the other end of the first section 61, the second pipe connector 622 is connected with the second return air branch pipe 8, the third pipe connector 623 is connected with one end of the third section 63, and one end of the third section 63, which is far away from the second section 62, is connected with a return air end of the circulating fan 2. The third segment 63 may be constructed in various forms according to the requirements of the installation environment, and the third segment 63 is used for connecting the third pipe connector 623 to the return air end of the circulating fan 2. As an alternative to the present application, the third section 63 is shaped as shown, and may be understood as a beveled cone.
The first return air branch pipe 7 and the second return air branch pipe 8 are of the same structure, so that the processing and the manufacturing are convenient; the main air return pipe 6 adopts a combined mode of an elbow and a three-way pipe, so that the installation space is saved, meanwhile, the cold temperature protective gas of the first air return branch pipe 7 is mixed with the high temperature protective gas of the second air return branch pipe 8, and the mixed protective gas enters the circulating fan 2, so that the air supply temperature control of the circulating fan 2 is realized, and the accurate control of the cooling speed of the strip steel is realized.
Alternatively, the first return air branch 7 is connected to the corresponding return air connection 14 via a first control valve 15, and the second return air branch 8 is connected to the corresponding return air connection 14 via a second control valve 16.
The first air return branch pipe 7 is connected with the air return connecting pipe 14 through a first regulating valve 15, so that the flow control of the cold and hot protective gas in the first air return branch pipe 7 is realized conveniently; the second return air branch pipe 8 is connected with a return air connecting pipe 14 through a second regulating valve 16, so that the flow control of the high-temperature protective gas in the second return air branch pipe 8 is realized conveniently; after the protective gas collected by the first return air branch pipe 7 and the protective gas collected by the second return air branch pipe 8 are mixed in the main return air pipe 6, the temperature of the protective gas is controlled, and therefore the air supply temperature of the circulating fan 2 is accurately controlled.
Further, as shown in fig. 1, a temperature detector 51 is provided to the blast pipe 5. The temperature detector 51 is configured to detect a temperature of the shielding gas in the air supply duct 5 (i.e., an air supply temperature), and adjust the first adjusting valve 15 and/or the second adjusting valve 16 according to the detected temperature, so as to control the temperature of the shielding gas in the air supply duct 5. The valve opening degree adjustment of the first adjusting valve 15 and the second adjusting valve 16 may be manual adjustment or automatic adjustment. When the temperature detector 51 detects that the temperature of the shielding gas in the blast pipe 5 is low, the valve opening of the first regulating valve 15 can be reduced or the valve opening of the second regulating valve 16 can be increased to increase the temperature of the shielding gas mixed in the main return air pipe 6; when the temperature detector 51 detects that the temperature of the shielding gas in the blast pipe 5 is high, the valve opening of the first regulating valve 15 may be increased or the valve opening of the second regulating valve 16 may be decreased to lower the temperature of the shielding gas mixed in the main return pipe 6.
As an alternative to the present application, the temperature detector 51 is electrically connected to the first regulating valve 15 and the second regulating valve 16 in order to achieve automatic control of the regulating valves. The first regulating valve 15 is used for responding to the signal of the temperature detector 51 to regulate the valve opening of the first regulating valve 15; the second regulating valve 16 is used to regulate the valve opening of the second regulating valve 16 in response to a signal from the temperature detector 51. The strip steel cooling device 100 further comprises a controller (not shown), the controller is electrically connected with the temperature detector 51, the first regulating valve 15 and the second regulating valve 16, the temperature detector 51 is used for detecting the temperature of the protective gas in the blast pipe 5 and generating a temperature signal to be sent to the controller, and the controller is used for receiving the temperature signal and controlling the valve opening degree of the first regulating valve 15 and/or the second regulating valve 16 to realize the regulation of the temperature of the protective gas flowing into the blast pipe 5. Meanwhile, the controller is also electrically connected with the heating device 81, and when the temperature of the protective gas in the blast pipe 5 is lower, the controller controls the heating device 81 to work to heat the protective gas in the second return pipe. The controller can adopt a PLC controller, and the control principle of the PLC controller refers to the control mode of the existing controller.
The working principle of the strip cooling device 100 according to the first embodiment of the present application is:
a second return air branch pipe 8 is additionally arranged on the cooling section furnace shell 1, and a heating device 81 is arranged in the second return air branch pipe 8; a heat exchanger 71 is arranged in the first return air branch pipe 7, and the protective gas in the first return air branch pipe 7 and the protective gas in the second return air branch pipe 8 are uniformly mixed in the main return air pipe 6. The protective gas in the first return air branch pipe 7 and the protective gas in the second return air branch pipe 8 are cooled and heated by the heat exchanger 71 and the heating device 81, and the cold protective gas and the hot protective gas are mixed in the main return air pipe 6. The low-temperature protective gas and the high-temperature protective gas are mixed in the main air return pipe 6 by adjusting the flow of the low-temperature protective gas in the first air return branch pipe 7 and the flow of the high-temperature protective gas in the second air return branch pipe 8, so that the temperature of the protective gas entering the air return end of the circulating fan 2 is controlled, and the cooling temperature of the strip steel is accurately controlled. The strip steel cooling device 100 solves the problem that the existing mode of arranging the electric radiant tube below the strip steel to heat the protective gas causes uneven cooling temperature of the strip steel.
The strip steel cooling device 100 eliminates the electric radiant tube on the lower surface of the strip steel, and the control of the cooling temperature of the strip steel is more accurate.
Examples of the second aspect
The strip production line according to the second aspect of the present application comprises the strip cooling apparatus 100 according to the first aspect of the present application.
According to the strip steel production line of the embodiment of the application, the strip steel cooling equipment 100 is adopted, the quality of strip steel is ensured through the accurate control of the cooling temperature of the strip steel, and the strip steel production line is suitable for the production of strip steel with different specifications.
It should be noted that the features of the embodiments in the present application may be combined with each other without conflict.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (9)
1. A strip steel cooling device is characterized by comprising a cooling section furnace shell, a circulating fan, an upper spray box, a lower spray box, an air supply pipe, a main air return pipe, a first air return branch pipe and a second air return branch pipe;
the cooling section furnace shell comprises a cooling cavity, the cooling section furnace shell is provided with a first air return opening and a second air return opening which are communicated with the cooling cavity, the upper spray box and the lower spray box are arranged in the cooling cavity, the upper spray box is provided with a first air inlet, the lower spray box is provided with a second air inlet, the air supply end of the circulating fan is connected with one end of the air supply pipe, the other end of the blast pipe is respectively connected with the first air inlet and the second air inlet, the return air end of the circulating fan is connected with one end of the main return air pipe, the other end of the main air return pipe is respectively connected with the first air return branch pipe and the second air return branch pipe, the first return air branch pipe is connected with the first return air inlet, the second return air branch pipe is connected with the second return air inlet, and the second return air branch pipe is provided with a heating device, and the heating device is used for heating the air in the second return air branch pipe.
2. The strip steel cooling device according to claim 1, wherein a heat exchanger is provided on the first return air branch pipe, the heat exchanger being configured to cool air in the first return air branch pipe.
3. The strip steel cooling device according to claim 1, wherein each air return inlet is provided with an air return connection pipe, the air return connection pipe is detachably connected with the cooling section furnace shell, the first air return branch pipe is detachably connected with the air return connection pipe of the first air return inlet, and the second air return branch pipe is detachably connected with the air return connection pipe of the second air return inlet.
4. The strip steel cooling device according to claim 3, wherein the first air return branch pipe comprises a first pipe section and a second pipe section which are connected with each other, the first pipe section is a straight pipe, the second pipe section is an elbow, one end of the first pipe section, which is far away from the second pipe section, is connected with the corresponding air return connection pipe, the second air return branch pipe comprises a third pipe section and a fourth pipe section which are connected with each other, the third pipe section is a straight pipe, the heating device is located in the third pipe section, the fourth pipe section is a three-way pipe, the fourth pipe section comprises a first connector, a second connector and a third connector, the first connector is connected with one end of the third pipe section, the other end of the third pipe section is connected with the second air return opening, the second connector is connected with the second pipe section, and the third connector is connected with the main air return pipe.
5. The strip steel cooling device according to claim 3, wherein the first return air branch pipe and the second return air branch pipe are straight pipes, the main return air pipe comprises a first section, a second section and a third section which are sequentially connected, the first section is an elbow, the second section is a three-way pipe, the third section is a connecting pipe, one end of the first section is connected with the first return air branch pipe, the second section comprises a first pipe joint, a second pipe joint and a third pipe joint, the first pipe joint is connected with the other end of the first section, the second pipe joint is connected with the second return air branch pipe, the third pipe joint is connected with one end of the third section, and one end of the third section, which is far away from the second section, is connected with a return air end of the circulating fan.
6. The strip steel cooling device according to claim 3, wherein the first return air branch pipe is connected to the corresponding return air connection pipe through a first regulating valve, and the second return air branch pipe is connected to the corresponding return air connection pipe through a second regulating valve.
7. The strip steel cooling device according to claim 6, wherein a temperature detector is provided on the blast pipe.
8. The strip cooling apparatus of claim 1 wherein the heating means are electric radiant tubes.
9. A strip steel production line, characterized by comprising the strip steel cooling apparatus of any one of claims 1 to 8.
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| CN201920818526.9U CN210048822U (en) | 2019-05-31 | 2019-05-31 | Strip steel cooling equipment and strip steel production line |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920818526.9U CN210048822U (en) | 2019-05-31 | 2019-05-31 | Strip steel cooling equipment and strip steel production line |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111495990A (en) * | 2020-03-25 | 2020-08-07 | 佛山津西金兰冷轧板有限公司 | Cooling circulation pipeline system for cold rolling mill |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111495990A (en) * | 2020-03-25 | 2020-08-07 | 佛山津西金兰冷轧板有限公司 | Cooling circulation pipeline system for cold rolling mill |
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