Control method and control system of rough rolling descaling system

Abstract

The invention discloses a control method and a control system for a rough rolling descaling system, relates to the field of hot rolling descaling, and can prolong the service life of descaling equipment. The control method for rough rolling descaling comprises the steps that the multiple sets of descaling pump sets are divided into main pump sets and auxiliary pump sets; according to a target descaling point of the hot-rolled steel plate to be descaled, the opening and closing number of the descaling injection valve set is determined, the target descaling point is arranged on the hot-rolled steel plate, the descaling pump set communicates with the descaling injection valves through the descaling main pipeline, and water outlets of the descaling injection valves face the target descaling point; and according to the opening number of the descaling injection valve groups of the target descaling point, controlling the at least one main pump group and the at least one auxiliary pump group to alternately accelerate so as to carry out descaling treatment on the target descaling point.

Description

Technical Field

[0001] The present application relates to the field of hot rolling descaling, and in particular to a control method and a control system for a rough rolling descaling system. Background Art

[0002] At present, in hot rolling production lines, in order to improve the quality of hot rolled products, online high-pressure water descaling systems are used to remove the iron oxide scale on the surface of the strip, and high-pressure water descaling systems are widely used. However, the descaling system cannot adjust the speed increase or decrease mode of the descaling pump according to the actual water consumption, resulting in a large amount of energy waste and power damage, which easily leads to a reduction in the service life of the descaling equipment. Summary of the invention

[0003] The embodiments of the present application provide a control method and a control system for a rough rolling descaling system, which can extend the service life of the descaling equipment.

[0004] In a first aspect of an embodiment of the present application, a control method for rough rolling descaling is provided, comprising:

[0005] Divide multiple descaling pump groups into main pump groups and auxiliary pump groups;

[0006] According to the target descaling point on the hot-rolled steel plate to be descaled, the opening and closing quantity of the descaling injection valve group is determined, wherein the descaling pump group is connected to the descaling injection valve through the descaling main line, and the water outlet of the descaling injection valve is oriented toward the target descaling point;

[0007] According to the opening number of the descaling injection valve group at the target descaling point, at least one of the main pump groups and at least one of the auxiliary pump groups are controlled to increase speed alternately to perform descaling treatment on the target descaling point.

[0008] In some embodiments, dividing the multiple descaling pump groups into a main pump group and an auxiliary pump group includes:

[0009] Determining the number of main pump groups to be opened according to the maximum water consumption of the target descaling point;

[0010] The number of auxiliary pump groups to be started is determined according to the difference between the maximum water consumption of the plurality of target descaling points and the minimum water consumption of a single target descaling point.

[0011] In some embodiments, the method of controlling at least one of the main pump groups and at least one of the auxiliary pump groups to alternately increase speed according to the number of openings of the descaling injection valve group at the target descaling point to perform descaling treatment on the target descaling point includes:

[0012] measuring the water pressure of the accumulator group when at least one of the descaling injection valve groups is open;

[0013] According to the water pressure of the accumulator group, at least one of the main pump groups and at least one of the auxiliary pump groups are controlled to increase speed alternately, wherein the accumulator group is arranged between the descaling pump group and the descaling injection valve, and the accumulator group is connected to the descaling main pipeline.

[0014] In some embodiments, the method of controlling at least one of the main pump groups and at least one of the auxiliary pump groups to alternately increase speed according to the number of openings of the descaling injection valve group at the target descaling point to perform descaling treatment on the target descaling point includes:

[0015] When at least four of the descaling injection valve groups are opened, measuring the water pressure of the accumulator group;

[0016] According to the water pressure of the accumulator group, at least one of the main pump groups and at least one of the auxiliary pump groups are controlled to synchronously increase speed.

[0017] In some embodiments, the method of controlling at least one of the main pump groups and at least one of the auxiliary pump groups to alternately increase speed according to the number of openings of the descaling injection valve group at the target descaling point to perform descaling treatment on the target descaling point includes:

[0018] When the current water pressure value of the descaling injection valve group is lower than the first preset pressure value of the accumulator group, controlling at least one of the main pump groups to increase speed and at least one of the auxiliary pump groups to increase speed;

[0019] When the current water pressure value of the descaling injection valve group is higher than the second preset pressure value of the accumulator group, at least one of the main pump groups and at least one of the auxiliary pump groups are controlled to slow down.

[0020] In some embodiments, the method for controlling rough rolling descaling further includes:

[0021] In two adjacent descaling processes, when the total duration of the two descaling processes is less than a preset duration, controlling the main pump group and the auxiliary pump group to perform at least 10 alternating speed increases;

[0022] In two adjacent descaling treatments, when the total opening time of the descaling injection valve group is greater than the preset time, at least one of the main pump groups and at least one of the auxiliary pump groups are controlled to increase speed simultaneously.

[0023] A second aspect of the embodiment of the present application provides a control system for rough rolling descaling, which is applied to the control method of the rough rolling descaling system as described in the first aspect, and the control system includes:

[0024] A descaling pump group, the descaling pump group includes a main pump group and an auxiliary pump group;

[0025] The descaling injection valve group, the descaling pump group is connected to the descaling injection valve group through the descaling main pipeline, and the water outlet of the descaling injection valve group is oriented toward the target descaling point, wherein the target descaling point is set on the hot-rolled steel plate.

[0026] In some embodiments, the descaling injection valve group includes six sub-descaling injection valve groups, wherein each sub-injection valve group is connected to at least one of the main pump groups and one of the auxiliary pump groups.

[0027] In some embodiments, the main pump group and the target descaling point are arranged one-to-one.

[0028] In some embodiments, the control system for rough bar descaling further includes:

[0029] An accumulator group, one end of which is connected to the descaling pump group, and the other end of which is connected to the descaling main pipeline.

[0030] The control method of the rough rolling descaling system provided in the embodiment of the present application divides multiple descaling pump groups into main pump groups and auxiliary pump groups, so that multiple descaling pump groups can be switched for use. The number of target descaling valves to be opened is then determined according to the number of target descaling points on the hot-rolled steel plate, and the target descaling points on the hot-rolled steel plate are descaled accurately and efficiently. According to the number of descaling injection valve groups opened, the main pump group and the auxiliary pump group are controlled to increase speed alternately to avoid the situation where the number of descaling injection valve groups opened is small, and the main pump group and the auxiliary pump group are increased in speed at the same time, causing a large amount of energy waste and power damage. Reduce the operating wear of the descaling pump group and extend the service life of the descaling equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic flow chart of a control method for a rough rolling descaling system provided in an embodiment of the present application;

[0032] Figure 2 A schematic flow chart of another control method of a rough rolling descaling system provided in an embodiment of the present application;

[0033] Figure 3 A schematic flow chart of a control method for a rough rolling descaling system provided in an embodiment of the present application;

[0034] Figure 4 A schematic flow chart of a control method for a rough rolling descaling system provided in an embodiment of the present application;

[0035] Figure 5 A schematic flow chart of a control method for a rough rolling descaling system provided in an embodiment of the present application;

[0036] Figure 6 A schematic structural diagram of a rough rolling descaling system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0037] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0038] In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements limited by the statement "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. The term "more than two" includes two or more than two situations.

[0039] At present, in hot rolling production lines, in order to improve the quality of hot rolled products, online high-pressure water descaling systems are used to remove the iron oxide scale on the surface of the strip, and high-pressure water descaling systems are widely used. However, the descaling system cannot adjust the speed increase or decrease mode of the descaling pump according to the actual water consumption. When the water consumption of the descaling system is small, the two descaling pumps are increased at the same time, resulting in a large amount of energy waste and power damage, which easily leads to a reduction in the service life of the descaling equipment.

[0040] In view of this, an embodiment of the present application provides a control method and a control system for a rough rolling descaling system, which can extend the service life of the descaling equipment.

[0041] A first aspect of an embodiment of the present application provides a control method for a rough rolling descaling system, comprising:

[0042] Step S100: Divide the multiple descaling pump groups into a main pump group and an auxiliary pump group.

[0043] Figure 1 A schematic flow chart of a control method for a rough rolling descaling system provided in an embodiment of the present application. Figure 1As shown, exemplarily, the rough rolling descaling system includes multiple descaling pump groups, and each descaling pump group is composed of a frequency converter, a variable frequency motor and a centrifugal pump. The total number of descaling pump groups can be set according to the total number of target descaling points on the hot-rolled steel plate with descaling. The main pump group and the auxiliary pump group are determined according to the water consumption of the target descaling points. The number of main pump groups can be one or more, and the number of auxiliary pump groups can also be one or more. The main pump group and the auxiliary pump group can be two adjacent descaling pump groups. The main pump group and the auxiliary pump group can automatically switch to increase or decrease the speed. By dividing the main pump group and the auxiliary pump group, multiple descaling pump groups can be switched for use, avoiding the continuous operation of a single main pump to increase the service life of the descaling pump group.

[0044] Step S200: Determine the opening and closing quantity of the descaling injection valve group according to the target descaling point on the hot-rolled steel plate to be descaled, wherein the descaling pump group is connected to the descaling injection valve through the descaling main line, and the water outlet of the descaling injection valve faces the target descaling point.

[0045] Exemplarily, the descaling system also includes a descaling main line and a descaling injection valve. The descaling pump group is connected to the descaling injection valve through the descaling main line, and the water outlet of the descaling injection valve is set toward the target descaling point on the hot-rolled steel plate. The hot-rolled steel plate is provided with multiple target descaling points, and the opening and closing number of the descaling injection valve group can be determined according to the number of target descaling points of the hot-rolled steel plate to be descaled. One target descaling point can correspond to the opening of a descaling injection valve, and one target descaling point can also correspond to the opening of a descaling injection valve. Among them, in the case where there is less steel slag to be removed on the surface of the target descaling point, a target descaling point can be set to open a corresponding descaling injection valve. In the case where there is less steel slag to be removed on the surface of the target descaling point, a target descaling point can be set to open a corresponding descaling injection valve. By determining the starting number of descaling injection valves according to the number of target descaling points, accurate descaling can be performed on the target descaling points on the hot-rolled steel plate to improve the descaling efficiency of the descaling system.

[0046] Step S300: According to the number of descaling injection valve groups opened at the target descaling point, at least one main pump group and at least one auxiliary pump group are controlled to increase speed alternately to perform descaling treatment on the target descaling point.

[0047] Exemplarily, according to the number of descaling injection valve groups opened at the target descaling point, at least one main pump group and at least one auxiliary pump group are controlled to alternately increase their speed. When one descaling valve group is opened, at least one main pump group and at least one auxiliary pump group can be controlled to alternately increase their speed. When multiple descaling valve groups are opened, multiple main pump groups and multiple auxiliary pump groups can be controlled to alternately increase their speed. Among them, the alternating speed increase of the main pump group and the auxiliary pump group can be that at least one main pump group is running at an increased speed, and the other auxiliary pump group is running at a low speed. It can also be that at least one auxiliary pump group is running at an increased speed, and the other main pump group is running at a low speed. In the process of descaling the target descaling point, according to the number of descaling injection valve groups opened at the target descaling point, at least one main pump group and at least one auxiliary pump group are controlled to alternately increase their speed, which can avoid a large amount of energy waste and power damage caused by the simultaneous speed increase of the main pump group and the auxiliary pump group when the number of descaling injection valve groups opened is small. Reduce the operating wear of the descaling pump group and increase the service life of the descaling equipment.

[0048] Usually, the high-pressure water descaling system cannot adjust the speed increase or decrease mode of the descaling pump according to the actual water consumption. When the descaling system uses less water, the two descaling pump groups increase their speed at the same time, causing a large amount of energy waste and power damage, which can easily reduce the service life of the descaling equipment.

[0049] The control method of the rough rolling descaling system provided in the embodiment of the present application divides multiple descaling pump groups into main pump groups and auxiliary pump groups, so that multiple descaling pump groups can be switched for use. The number of target descaling valves to be opened is determined according to the number of target descaling points on the hot-rolled steel plate, and the target descaling points on the hot-rolled steel plate are descaled accurately and efficiently. Then, according to the number of descaling injection valve groups opened, the main pump group and the auxiliary pump group are controlled to increase their speed alternately to avoid the situation where the number of descaling injection valve groups opened is small, and the main pump group and the auxiliary pump group are increased in speed at the same time, causing a large amount of energy waste and power damage. Reduce the idle consumption of the descaling system, reduce the operating wear of the descaling equipment, and increase the service life of the descaling equipment.

[0050] In some implementations, step S100 includes:

[0051] S101: Determine the number of main pump groups to be turned on according to the maximum water consumption of the target descaling point.

[0052] Figure 2 A schematic flow chart of another control method of a rough rolling descaling system provided in an embodiment of the present application. Figure 2As shown, for example, different types of hot-rolled steel have different descaling requirements. Some steel types require multi-point descaling, while some steel types require single-point descaling. The target descaling points of different steel types require different amounts of water. This application determines the number of main pump groups to be opened based on the maximum water consumption at the target descaling point on the hot-rolled steel plate. The number of main pump groups to be opened can be determined for different steel types to adapt to the removal of iron oxide scale on the surface of different steel types.

[0053] S102: Determine the number of auxiliary pump groups to be started according to the difference between the maximum water consumption of multiple target descaling points and the minimum water consumption of a single target descaling point.

[0054] Exemplarily, the difference between the maximum water consumption of multiple target descaling points and the minimum water consumption of a single target descaling point is the total water consumption of the remaining target descaling points. When the total water consumption of the remaining target descaling points is less than or equal to the maximum water consumption of a single target descaling point, an auxiliary pump group is turned on. When the total water consumption of the remaining target descaling points is greater than the maximum water consumption of a single target descaling point, the multiple of the ratio of the total water consumption of the remaining target descaling points to the maximum water consumption of a single target descaling point is the number of auxiliary pump group starts, and the multiple is less than or equal to 1, and is set according to turning on an auxiliary pump group. According to the difference between the maximum water consumption of multiple target descaling points and the minimum water consumption of a single target descaling point, the number of auxiliary pump groups to be turned on is determined, and the working mode of switching between the main pump and the auxiliary pump is realized, which can avoid the main pump from running independently for a long time to descale the target descaling point, thereby extending the service life of the descaling pump group. The number of main pump groups and auxiliary pump groups turned on is set according to the water consumption of the target descaling point, so that the descaling system can improve the service life of the descaling equipment while adapting to the descaling of different steel grades, and improve the stability of the descaling system.

[0055] In some embodiments, step 300 includes:

[0056] Step 301: When at least one descaling injection valve group is open, measure the water pressure of the accumulator group.

[0057] Figure 3 A schematic flow chart of a control method for a rough rolling descaling system provided in an embodiment of the present application. Figure 3 As shown, exemplarily, the descaling system also includes an accumulator group, a descaling pump group is arranged at one end of the descaling main line away from the target descaling point, the accumulator group is connected to multiple descaling pump groups, and the accumulator group is arranged on the descaling main line between multiple descaling pump groups and multiple descaling injection valves. A first pressure testing device is arranged on the accumulator group, and the first pressure testing device can detect the pressure inside the accumulator group in real time. The pressure of the accumulator group can reflect the water output of the descaling valve group. By detecting the pressure in the accumulator group in real time, the output water volume of the descaling valve group can be adjusted in real time to achieve accurate descaling of the target descaling point.

[0058] Step 302: According to the water pressure of the accumulator group, control at least one main pump group and at least one auxiliary pump group to increase speed alternately.

[0059] Exemplarily, the accumulator group provides high-pressure water for the target descaling point, and the high-pressure water output by the accumulator group is output from the water outlet of the descaling injection valve to descaling the target descaling point. When at least one descaling injection valve group is opened, the water pressure of the accumulator group is measured, and the water output of the descaling injection valve is determined according to the water pressure of the accumulator group. When the water pressure of the accumulator group is lower than the preset water pressure, the water output of the descaling injection valve is lower than the minimum water consumption of the target descaling point, and the variable frequency motor of a main pump group is controlled to automatically increase the speed, the centrifugal pump increases the speed to replenish water to the accumulator group, and an auxiliary pump runs at a low speed. When the pressure of the accumulator group is higher than the preset water pressure, the water output of the descaling injection valve is higher than the maximum water consumption of the target descaling point, the variable frequency motor of the main pump group automatically decreases the speed, the variable frequency motor runs at a low speed, the main pump group does not replenish water to the accumulator group, and the auxiliary pump group increases the speed. The preset water pressure is set according to the amount of iron oxide scale on the surface of the hot-rolled steel plate during the actual production process. The more iron oxide scale on the surface of the hot-rolled steel plate, the greater the preset water pressure. Conversely, the less iron oxide scale on the surface of the hot-rolled steel plate, the smaller the preset water pressure. Usually, the preset water pressure value range is 19-20MPa. By testing the pressure of the accumulator group, the target water consumption for descaling is determined. According to the target water consumption for descaling, the main pump group and the auxiliary pump group of the descaling pump group are controlled to alternately increase the speed, so as to avoid the descaling pump group from running at a high speed for a long time, save energy waste, and reduce the running wear of the descaling pump group.

[0060] In some implementations, step 300 further includes:

[0061] Step 303: When at least four descaling injection valve groups are opened, measure the water pressure of the accumulator group.

[0062] Step 304: According to the measured water pressure of the accumulator group, control at least one main pump group and at least one auxiliary pump group to synchronously increase the speed.

[0063] Figure 4 A schematic flow chart of a control method for a rough rolling descaling system provided in an embodiment of the present application. Figure 4As shown, exemplarily, when at least four descaling injection valve groups are opened, the water pressure of the accumulator group is measured, and the water output of the descaling injection valve is determined according to the water pressure of the accumulator group. When the water pressure of the accumulator group is lower than the preset water pressure, the water output of the descaling injection valve is lower than the minimum water consumption of at least four target descaling points, and the frequency conversion motors of at least one main pump group and at least one auxiliary pump group are controlled to increase speed synchronously, and the centrifugal pump increases speed to replenish water to the accumulator group. When the water pressure of the accumulator group is higher than the preset water pressure, the water output of the descaling injection valve is higher than the maximum water consumption of at least four target descaling points, and the frequency conversion motors of at least one main pump group and at least one auxiliary pump group are controlled to increase speed synchronously, and the centrifugal pump does not replenish water to the accumulator group. By testing the pressure of the accumulator group, the water consumption of the target descaling is determined. When the total water consumption of multiple target descaling points is lower than the minimum water consumption of multiple target descaling motors, the main pump group and the auxiliary pump group are controlled to increase speed synchronously, so as to quickly descale multiple target descaling synchronously and improve the descaling efficiency.

[0064] In some implementations, step 300 further includes:

[0065] Step 305: When the water pressure value of the descaling injection valve group is lower than the first preset pressure value of the accumulator group, control at least one main pump group and at least one auxiliary pump group to increase their speed.

[0066] Figure 5 A schematic flow chart of a control method for a rough rolling descaling system provided in an embodiment of the present application. Figure 5 As shown, exemplarily, multiple descaling injection valve groups are provided with multiple second pressure detection devices, and a second pressure detection device is provided on the valve of each descaling valve group, and the second pressure detection device detects the water pressure value of the descaling injection valve group. When the water pressure value of the descaling injection valve group is lower than the preset pressure value of the accumulator group, at least one main pump group and at least one auxiliary pump group are controlled to increase the speed, and the first preset pressure value is the minimum pressure of the accumulator group, and the minimum pressure value is 19Mpa. Through the setting of the second pressure detection device and the descaling injection valve group, it is possible to detect in real time whether the water pressure of each descaling injection valve group is the same as the water pressure of the accumulator group, and control the operating status of the main pump group and the auxiliary pump group in real time to improve the reliability of the descaling system.

[0067] Step 306: When the water pressure value of the descaling injection valve group is higher than the second preset pressure value of the accumulator group, control at least one main pump group to slow down and at least one auxiliary pump group to slow down.

[0068] Exemplarily, when the water pressure value of the descaling injection valve group is higher than the second preset pressure value of the accumulator group, at least one main pump group and at least one auxiliary pump group are controlled to slow down, and the second preset pressure value is the maximum pressure of the accumulator group, and the maximum pressure value is 20Mpa. Through the setting of the second pressure detection device and the descaling injection valve group, it is possible to detect in real time whether the water pressure of each descaling injection valve group is the same as the water pressure of the accumulator group, and control the operating status of the main pump group and the auxiliary pump group in real time to improve the reliability of the descaling system.

[0069] In some embodiments, the method for controlling rough rolling descaling further includes:

[0070] In two adjacent descaling processes, if the total duration of the two descaling processes is less than the preset duration, the main pump group and the auxiliary pump group are controlled to alternately increase the speed at least 10 times. In two adjacent descaling processes, if the total duration of the descaling injection valve group being opened is greater than the preset duration, at least one main pump group and at least one auxiliary pump group are controlled to increase the speed simultaneously. According to the total descaling duration, the main pump group and the auxiliary pump group are set to alternately increase the speed or synchronously increase the speed, so as to accurately control the descaling duration to meet the requirements of rapid descaling under different descaling durations.

[0071] Exemplarily, when the number of opening and closing times of a single descaling injection valve group is ≤2, the descaling pump group adopts the main pump and auxiliary pump mode, that is, one of the main pump groups increases speed, and the other auxiliary pump group runs at a low speed, and the main pump group and the auxiliary pump group rotate every 10 times the speed increases. When the number of opening and closing times of a single descaling injection valve is 3<the number of opening and closing times≤4, and in the case where the total opening time of the descaling injection valve group in two adjacent descaling treatments is greater than the preset time <60s, the descaling pump group adopts the main pump and auxiliary pump mode, that is, one of the main pump groups increases speed, and the other auxiliary pump group runs at a low speed, and the main pump group and the auxiliary pump group rotate every 10 times the speed increases, and when the total time of two descaling treatments is ≥60s, the main pump group and the auxiliary pump group increase speed at the same time. When the number of opening and closing times of a single descaling injection valve group is >4, the main pump group and the auxiliary pump group increase speed at the same time. By setting the main pump group and the auxiliary pump group to increase or decrease the speed during two adjacent descaling processes, descaling can be carried out on the target treatment point in a targeted manner, avoiding the main pump group or the auxiliary pump group from increasing or decreasing the speed for a long time, saving equipment operating costs, and extending the service life of the descaling equipment.

[0072] A second aspect of the embodiments of the present application provides a control system for coarse-wire descaling, which is applied to a control method for the coarse-wire descaling system as in the first aspect. Figure 6 This is a schematic structural diagram of a rough rolling descaling system provided in an embodiment of the present application. Figure 6As shown, the control system of rough steel descaling includes a descaling pump group and a descaling injection valve group. The descaling pump group includes 1# descaling pump group, 2# descaling pump group, 3# descaling pump group...N# descaling pump group, and the descaling injection valve group includes the first initial descaling inlet injection valve group R5, the first initial descaling outlet injection valve R6, the first inlet injection valve group R1, the first outlet injection valve group R2, the second inlet injection valve group R3, and the second outlet injection valve group R4. The descaling pump group is connected to the descaling injection valve through the descaling main line, and the water outlet of the descaling injection valve is directed to the target descaling point, wherein the target descaling point is set on the hot-rolled steel plate, and the descaling injection valve group is provided with a descaling injection valve. The descaling pump group includes a main pump group and an auxiliary pump group. There are multiple main pump groups and auxiliary pump groups. The number of opening of the main pump group and the auxiliary pump group and the operating status of the main pump group and the auxiliary pump group can be controlled by the descaling and opening number of the target descaling point, so as to perform accurate descaling treatment on the target descaling point.

[0073] The embodiment of the present application realizes the alternating operation of multiple descaling pump groups by setting the main pump group and the auxiliary pump group, and controls the number of the main pump group and the auxiliary pump group to be opened and the operation state of the main pump group and the auxiliary pump group by the number of descaling methods to be opened at the target descaling point, thereby avoiding the long-term operation of a single descaling pump group. While realizing precise descaling, the idle consumption of the descaling system is reduced, and the service life of the descaling equipment is extended.

[0074] In some embodiments, the descaling injection valve group includes six sub-descaling injection valve groups, wherein each sub-injection valve group is connected to at least one main pump group and one auxiliary pump group. By setting each descaling injection valve group to be connected to at least one main pump and at least one auxiliary pump, each injection valve group can discharge water normally, so as to improve the stability of the operation of the descaling equipment.

[0075] For example, Figure 6 As shown, the descaling valve group includes a first descaling inlet injection valve group R5, a first descaling outlet injection valve R6, a first inlet injection valve group R1, a first outlet injection valve group R2, a second inlet injection valve group R3 and a second outlet injection valve group R4. Each descaling injection valve group is connected to at least one main pump and at least one auxiliary pump, the main pump group is a common pump, and the auxiliary pump group is a standby pump. By setting each descaling injection valve group to be connected to at least one main pump and at least one auxiliary pump, it is ensured that in the event of a failure of the main pump group, the auxiliary pump group can replace the main pump group for normal water supply, so that each injection valve group can discharge water normally, so as to improve the consistency of multiple descaling points.

[0076] In some embodiments, the main pump group is set one-to-one with the target descaling point. The target descaling point can be provided with multiple sub-descaling injection valve groups, or one sub-descaling injection valve group. Setting the main pump group and the target descaling point one-to-one can ensure that multiple sub-descaling injection valve groups of the target descaling can perform accurate descaling.

[0077] In some embodiments, the descaling system further includes a first accumulator group 110 and a second accumulator group 120, one end of the accumulator group is connected to the scale pump group, and the other end is connected to the descaling main line. The descaling pump group is arranged at one end of the descaling main line away from the target descaling voltage, the first accumulator group 110 and the second accumulator group 120 are connected to multiple descaling pump groups, and the first accumulator group 110 and the second accumulator group 120 are arranged on the descaling main line between multiple descaling pump groups and multiple descaling injection valves. The first accumulator group 110 and the second accumulator group 120 are both provided with a first pressure testing device, and the first pressure testing device can detect the pressure inside the accumulator group in real time. The pressure of the first accumulator group 110 can reflect the water output of the first inlet injection valve group R1 and the first outlet injection valve group R2. By detecting the pressure in the accumulator group in real time, the output water volume of the first inlet injection valve group R1 and the second outlet injection valve group R2 can be adjusted in real time to achieve accurate descaling. The pressure of the second accumulator group 120 reflects the second inlet injection valve group R3, the second outlet injection valve group R4, the first initial descaling inlet injection valve group R5 and the first initial descaling outlet injection valve R6. By real-time detection of the pressure in the accumulator group, the output water volume of the second inlet injection valve group R3, the second outlet injection valve group R4, the first initial descaling inlet injection valve group R5 and the first initial descaling outlet injection valve R6 can be adjusted in real time to achieve accurate descaling. The accumulator group provides high-pressure water for the target descaling point, and the high-pressure water output by the accumulator group is output from the water outlet of the descaling injection valve to adjust the water output of the descaling injection valve, thereby accurately descaling the target descaling point.

[0078] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and for parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0079] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0080] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

[0081] Although the preferred embodiments of this specification have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of this specification.

[0082] Obviously, those skilled in the art can make various changes and modifications to this specification without departing from the spirit and scope of this specification. Thus, if these modifications and variations of this specification fall within the scope of the claims of this specification and their equivalents, this specification is also intended to include these modifications and variations.

Claims

1. A control method for rough rolling descaling, characterized in that: include: Divide multiple descaling pump groups into main pump groups and auxiliary pump groups; According to the target descaling point on the hot-rolled steel plate to be descaled, the opening and closing quantity of the descaling injection valve group is determined, wherein the descaling pump group is connected to the descaling injection valve through the descaling main line, and the water outlet of the descaling injection valve is oriented toward the target descaling point; According to the opening number of the descaling injection valve group at the target descaling point, at least one of the main pump groups and at least one of the auxiliary pump groups are controlled to increase speed alternately to perform descaling treatment on the target descaling point.

2. The control method for rough rolling descaling according to claim 1, characterized in that: The method of dividing the plurality of descaling pump groups into a main pump group and an auxiliary pump group comprises: Determining the number of main pump groups to be opened according to the maximum water consumption of the target descaling point; The number of auxiliary pump groups to be started is determined according to the difference between the maximum water consumption of the plurality of target descaling points and the minimum water consumption of a single target descaling point.

3. The control method for rough rolling descaling according to claim 1, characterized in that: According to the number of openings of the descaling injection valve group at the target descaling point, controlling at least one of the main pump groups and at least one of the auxiliary pump groups to alternately increase speed to perform descaling treatment on the target descaling point includes: measuring the water pressure of the accumulator group when at least one of the descaling injection valve groups is open; According to the water pressure of the accumulator group, at least one of the main pump groups and at least one of the auxiliary pump groups are controlled to increase speed alternately, wherein the accumulator group is arranged between the descaling pump group and the descaling injection valve, and the accumulator group is connected to the descaling main pipeline.

4. The control method for rough rolling descaling according to claim 3, characterized in that: According to the number of openings of the descaling injection valve group at the target descaling point, controlling at least one of the main pump groups and at least one of the auxiliary pump groups to alternately increase speed to perform descaling treatment on the target descaling point includes: When at least four of the descaling injection valve groups are opened, measuring the water pressure of the accumulator group; According to the water pressure of the accumulator group, at least one of the main pump groups and at least one of the auxiliary pump groups are controlled to synchronously increase speed.

5. The method for controlling rough rolling descaling according to claim 4, characterized in that: According to the number of openings of the descaling injection valve group at the target descaling point, controlling at least one of the main pump groups and at least one of the auxiliary pump groups to alternately increase speed to perform descaling treatment on the target descaling point includes: When the current water pressure value of the descaling injection valve group is lower than the first preset pressure value of the accumulator group, controlling at least one of the main pump groups to increase speed and at least one of the auxiliary pump groups to increase speed; When the current water pressure value of the descaling injection valve group is higher than the second preset pressure value of the accumulator group, at least one of the main pump groups and at least one of the auxiliary pump groups are controlled to slow down.

6. The method for controlling rough rolling descaling according to claim 1, further comprising: In two adjacent descaling processes, when the total duration of the two descaling processes is less than a preset duration, controlling the main pump group and the auxiliary pump group to perform at least 10 alternating speed increases; In two adjacent descaling treatments, when the total opening time of the descaling injection valve group is greater than the preset time, at least one of the main pump groups and at least one of the auxiliary pump groups are controlled to increase speed simultaneously.

7. A control system for rough bar descaling, applied to the control method of the rough bar descaling system as claimed in claims 1 to 6, characterized in that: The control system comprises: A descaling pump group, the descaling pump group includes a main pump group and an auxiliary pump group; The descaling injection valve group, the descaling pump group is connected to the descaling injection valve group through the descaling main pipeline, and the water outlet of the descaling injection valve group is oriented toward the target descaling point, wherein the target descaling point is set on the hot-rolled steel plate.

8. The control system for rough bar descaling according to claim 7, characterized in that: The descaling injection valve group includes six sub-descaling injection valve groups, wherein each sub-injection valve group is connected to at least one main pump group and one auxiliary pump group.

9. The control system for rough bar descaling according to claim 7, characterized in that: The main pump group and the target descaling point are arranged one-to-one.

10. The control system for rough bar descaling according to claim 7, characterized in that: Also includes: An accumulator group, one end of which is connected to the descaling pump group, and the other end of which is connected to the descaling main pipeline.

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