CN108941224B

CN108941224B - Descaling header device with sectional control

Info

Publication number: CN108941224B
Application number: CN201810959590.9A
Authority: CN
Inventors: 耿明山; 曹建宁; 江涛; 向继涛
Original assignee: MCC Capital Engineering and Research Incorporation Ltd
Current assignee: MCC Capital Engineering and Research Incorporation Ltd
Priority date: 2018-08-22
Filing date: 2018-08-22
Publication date: 2024-02-06
Anticipated expiration: 2038-08-22
Also published as: CN108941224A

Abstract

The invention discloses a descaling header device controlled in a sectionalized manner, which comprises an upper header mechanism (10) and a lower header mechanism (20) which are arranged up and down; the upper header mechanism (10) comprises an upper water storage bin header (101) and an upper descaling header (113) which are arranged up and down, a plurality of mutually independent and closed upper water diversion bins (109) are arranged in the upper descaling header (113), each upper water diversion bin (109) is at least communicated with one upper nozzle assembly (112), and each upper water diversion bin (109) is at least communicated with the upper water storage bin header (101) through one upper connecting pipe (105). The descaling header device with the sectional control realizes the control of different descaling widths of high-pressure water according to different widths of casting blanks or blanks, avoids the excessively low temperature of the edges of the casting blanks or rolled blanks, avoids a great amount of waste of the high-pressure water, ensures the stable and safe operation of equipment, and can efficiently descale the surfaces of the casting blanks or rolled blanks and reduce pressure fluctuation.

Description

Descaling header device with sectional control

Technical Field

The invention relates to the field of smelting and rolling auxiliary equipment, in particular to a descaling header device with sectional control.

Background

The billet is oxidized at a high temperature, and a dense scale (scale) is formed on the surface of the billet. If this scale cannot be removed before rolling, they can affect the surface quality of the finished product during rolling. The residual iron scale can also accelerate the abrasion of the roller and reduce the service life of the roller. If the steel billet needs to be pickled, the residual iron scale can increase the difficulty of pickling and increase the acid consumption. Therefore, before billet rolling, it is necessary to remove the scale on the surface. The method of removing scale (high-pressure water descaling) by using the mechanical impact force of high-pressure water is currently the most popular and effective method.

In the metallurgical field, primary and secondary scale is generated on the surface of steel pieces such as billets, steel plates, section steel and steel pipes in the rolling and forging processes, and a method for removing the scale (descaling) is generally carried out by spraying high-pressure water. The high-pressure water injection for scale (descaling) is manifold injection and is designed and arranged according to the maximum width of the blank or strip steel. However, on the other hand, there are cases where a large number of billets, strip steel rolls, and descaling plans thereof do not reach the limit width, and therefore, in the step of removing scale (descaling) after billets and strip steel rolls, the width of high-pressure water descaling spray designed and arranged in accordance with the maximum width of billets and strip steel is not used effectively, and there are cases where high-pressure water up-down counter flushing high-pressure nozzles are used inefficiently. For example, under the action of high-frequency high-pressure momentum water, the jet of high-pressure water strikes the high-pressure nozzle base weld, making it thinner, and often causing the high-pressure nozzle weld to burst, reducing nozzle life. In addition, the vertical opposite impact of the high pressure water jet may cause the high pressure nozzle to drop off the high pressure nozzle base due to the impact, and the dropped nozzle may cause safety accidents or unnecessary damages to the human body or the steel member. Meanwhile, a large amount of high-pressure descaling water has the problem of waste, equipment and power consumption of a water supply system are increased, and meanwhile, the load of water treatment is increased. Particularly, as all nozzles are used for spraying, the pressure of high-pressure water is reduced too fast in the descaling process, the range of pressure fluctuation is large, and meanwhile, in order to ensure the descaling effect, a high-pressure high-flow water supply pump and a large-volume energy accumulator are required to be arranged, so that the investment and the operation cost of equipment are increased.

The temperature of the edges of the blank and the strip steel is too low due to improper cooling of cooling water, so that uneven temperature in the width direction of the blank or the rolled blank is easy to occur, and the difference of transverse material properties of the rolled product and the edge wave defect are increased.

Disclosure of Invention

In order to solve the problem that the existing descaling device is not matched with a blank, the invention provides a sectionally-controlled descaling header device, which can realize different control of the descaling width of high-pressure water according to different widths of the blank or the blank, avoid the temperature of the edge of the blank or the rolled blank from being too low, avoid a great amount of waste of the high-pressure water, ensure the stable and safe operation of equipment, and also can efficiently descale the surface of the blank or the rolled blank and reduce pressure fluctuation.

The invention solves the technical problems that: a scale removal header device controlled in a sectional way comprises an upper header mechanism and a lower header mechanism which are arranged up and down; the upper collecting pipe mechanism comprises an upper water storage bin collecting pipe and an upper descaling collecting pipe which are arranged up and down, a plurality of mutually independent and sealed upper water diversion bins are arranged in the upper descaling collecting pipe along the central line direction of the upper descaling collecting pipe, a plurality of upper nozzle assemblies are arranged at the lower part of the upper descaling collecting pipe, each upper water diversion bin is at least communicated with one upper nozzle assembly, and each upper water diversion bin is at least communicated with the upper water storage bin collecting pipe through one upper connecting pipe; the lower header mechanism comprises a lower descaling header and a lower water storage bin header which are arranged up and down, a plurality of mutually independent and closed lower water diversion bins are arranged in the lower descaling header along the central line direction of the lower descaling header, a plurality of lower nozzle assemblies are arranged at the upper part of the lower descaling header, each lower water diversion bin is at least communicated with one lower nozzle assembly, and each lower water diversion bin is at least communicated with the lower water storage bin header through one lower connecting pipe.

The upper descaling collecting pipe and the lower descaling collecting pipe are parallel to each other, the upper collecting pipe mechanism and the lower collecting pipe mechanism are mirror images, an electromagnetic valve, an adjusting valve and a flowmeter are arranged on an upper connecting pipe, and the upper connecting pipe comprises a hose section; the sectionally controlled descaling header device further comprises a lifting mechanism, and the lifting mechanism can enable the upper descaling header and the lower descaling header to independently move along the vertical direction respectively.

The lower part of the upper descaling header is provided with a water baffle and at least one anti-collision plate, the water baffle is arranged outside the upper descaling header, through holes corresponding to the upper nozzle assemblies one by one are formed in the water baffle, the upper end of the anti-collision plate is fixedly connected with the lower surface of the water baffle, the anti-collision plate is positioned between two adjacent upper nozzle assemblies, the lower end of the anti-collision plate is lower than the lower end of the upper nozzle assemblies, two side sealing plates are sleeved outside the upper descaling header, and all the upper nozzle assemblies are positioned between the two side sealing plates.

Along the diameter direction of the upper descaling header, each upper nozzle assembly comprises a nozzle lower base, a nozzle upper base, a nozzle nut and a nozzle head which are sequentially connected, one end of the nozzle lower base is inserted into the upper descaling header, and the nozzle upper base, the nozzle nut and the nozzle head are all positioned outside the upper descaling header.

The water retaining cap is sleeved outside the upper base of the nozzle, the outer annular boss is arranged outside the upper base of the nozzle, the water retaining cap is of a cylindrical structure, the water retaining cap comprises a ring segment and a cone segment which are sequentially connected, the top end of the cone segment is connected with the ring segment, the bottom end of the cone segment faces the upper descaling header, the top end of the cone segment faces the nozzle head, and the ring segment is located between the annular boss and the nozzle nut of the upper base of the nozzle.

The cone section is located the below of breakwater, and the distance is less than or equal to 2mm between the bottom of cone section and the breakwater, and the external diameter of the bottom of cone section is greater than the breakwater the internal diameter of through-hole, contain gasket and the fastening nut that connect gradually between the ring section of manger plate cap and the nozzle nut, fastening nut and nozzle nut all with nozzle upper base threaded connection.

The water outlet of the nozzle head is of a slit structure, the water outlet of the nozzle head can spray sheet water flow, the sheet water flow is obliquely arranged relative to the horizontal plane, and the oblique direction of the sheet water flow sprayed by the upper nozzle assembly positioned on the left side of the upper descaling header is opposite to the oblique direction of the sheet water flow sprayed by the upper nozzle assembly positioned on the right side of the upper descaling header.

The section of the water baffle is arc, the central angle corresponding to the arc is 180 degrees, the central line of the water baffle coincides with the central line of the upper descaling collecting pipe, a gap exists between the water baffle and the upper descaling collecting pipe, the anti-collision plate is crescent, and the upper end of the anti-collision plate is welded with the lower surface of the water baffle.

The outer welding of one end of upper water storage storehouse collector has the water inlet end cover, is provided with two at least inlet openings in the water inlet end cover, and the outer welding of the other end of upper water storage storehouse collector has the seal end cover, and the both ends of upper descaling collector have the collector end cover, and the outer fastening bolt hole of collector end cover.

The inside of the sealing end cover is provided with a drain hole, the drain hole comprises a horizontal section and a lower inclined section which are connected in sequence, the lower inclined section of the drain hole is positioned at the inner side of the sealing end cover, the horizontal section of the drain hole is positioned at the outer side of the sealing end cover, the drain hole is externally connected with a valve, and a fastening bolt hole is arranged outside the water inlet end cover and the sealing end cover.

The beneficial effects of the invention are as follows:

1. according to the descaling device, according to the descaling requirements or cooling requirements of the blanks with different widths, the electromagnetic valve and the flow regulating valve which are connected between the water storage bin header pipe and the descaling header pipe with corresponding widths are correspondingly opened, so that spray descaling operation of the nozzles with corresponding widths is realized, different descaling water amounts are realized by regulating different positions of high-pressure water on the widths of the blanks, the requirements of effective descaling and regional control cooling on the widths of the blanks are realized, and the problem that a large amount of waste of high-pressure water is caused by spray of the nozzles with unexpected widths of the blanks is avoided.

2. According to the invention, by controlling the different high-pressure water consumption in different areas within the width range, the temperature drop of the blank edge can be reduced, and the uniformity of the plate shape, mechanical property, temperature and phase change of the steel plate formed by rolling the blank in the width direction is ensured.

3. According to the invention, the height of the descaling header is adjusted according to the height of the blank, so that the distance between the outlet position of the nozzle and the upper surface of the blank can be adjusted on line, and the blanks with different thicknesses can realize good descaling effect.

4. According to the invention, the injection width and the injection position of the nozzle are adjusted according to the detection width of the blank and the position in the roller way, the independent control of the water diversion bin is controlled through the electromagnetic valve, the adjustment of the injection width and the configuration of the nozzle is realized, and meanwhile, the flow regulating valve and the flowmeter can be utilized to adjust the water quantity in different water diversion bins, so that the control of the surface temperature of the blank is realized.

5. The water baffle plates are additionally arranged on the upper header and the lower header, so that the problems of damage, cracking and the like of the header are reduced, and the service life of the header is prolonged, wherein the high-pressure water is prevented from scouring the descaling header after being sprayed to the surface of the blank and reflected.

6. The lifting mechanism is additionally arranged on the lower header pipe, so that the distance between the outlet of the descaling nozzle of the lower header pipe and the lower surface of the blank can be adjusted according to different blank thickness and process requirements, the requirements of different descaling striking forces are met, and different descaling effects are realized.

7. According to the technical scheme, the waste of the descaling water can be effectively reduced, the load of water treatment is reduced, the pressure drop of a pipe network is reduced, the working pressure and the power consumption of a pressurizing pump of the descaling pipe network are reduced, the production cost is reduced, and the descaling pipe network is convenient to popularize and apply further.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.

FIG. 1 is a general schematic of a sectionally controlled descaling header apparatus according to the present invention.

Fig. 2 is a schematic view of an upper header mechanism.

Fig. 3 is a schematic view of the direction a in fig. 2.

FIG. 4 is a schematic view of an upper descaling header.

Fig. 5 is a sectional view taken along the direction B-B in fig. 4.

Fig. 6 is a schematic view of the connection of the water deflector.

Fig. 7 is a schematic view of the attachment of the impact plate.

Fig. 8 is a structure of the nozzle assembly.

Fig. 9 is an enlarged schematic view of the portion C in fig. 8.

FIG. 10 is a schematic view of water spray from the upper nozzle assembly in the upper header mechanism.

FIG. 11 is a schematic view of the upper and lower descaling header positions and nozzle spray positions with a smaller gauge blank thickness.

FIG. 12 is a schematic view of the upper and lower descaling header positions and nozzle spray positions for a larger gauge blank thickness.

FIG. 13 is a schematic view of the spray location of the top and bottom descaling header spray nozzles for the widest blanks.

Fig. 14 is a schematic view of the nozzle spray position with the blank width between the minimum width and the maximum width.

FIG. 15 is a schematic view of the spray location of the spray nozzle with the centerline of the blank offset from the centerline of the header.

10. An upper header mechanism; 20. a lower header mechanism; 30. blank material;

101. an upper water storage bin header; 102. a hose connector; 103. a water inlet end cover; 104. a connecting flange; 105. a connecting pipe; 106. a side sealing plate; 107. a header end cap; 108. a fastening bolt; 109. a water dividing bin; 110. an anti-collision plate; 111. a water baffle; 112. an upper nozzle assembly; 113. a top descaling header; 114. a fastening bolt hole; 115. a blow-down hole; 116. a valve; 117. a sealing bolt; 118. an electromagnetic valve; 119. a regulating valve; 120. a flow meter; 121. sealing the end cover;

201. a lower water storage bin header; 202. a lower water dividing bin; 203. a lower descaling header; 204. a lower nozzle assembly; 205. a lower connecting pipe;

301. a nozzle lower base; 302. a nozzle upper base; 303. a nozzle nut; 304. a nozzle head; 305. a water retaining cap; 306. a gasket; 307. a fastening nut; 308. a sealing gasket; 309. a sheet-like water flow;

3051. a loop segment; 3052. a cone section.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.

A scale removal header device controlled in a sectional manner comprises an upper header mechanism 10 and a lower header mechanism 20 which are arranged up and down; the upper header mechanism 10 comprises an upper water storage bin header 101 and an upper descaling header 113 which are arranged up and down, a plurality of mutually independent and closed upper water diversion bins 109 are arranged in the upper descaling header 113 along the central line direction of the upper descaling header 113, a plurality of upper nozzle assemblies 112 are arranged at the lower part of the upper descaling header 113, each upper water diversion bin 109 is at least communicated with one upper nozzle assembly 112, and each upper water diversion bin 109 is at least communicated with the upper water storage bin header 101 through one upper connecting pipe 105; the lower header mechanism 20 comprises a lower descaling header 203 and a lower water storage bin header 201 which are arranged up and down, a plurality of mutually independent and closed lower water diversion bins 202 are arranged in the lower descaling header 203 along the central line direction of the lower descaling header 203, a plurality of lower nozzle assemblies 204 are arranged at the upper part of the lower descaling header 203, each lower water diversion bin 202 is at least communicated with one lower nozzle assembly 204, and each lower water diversion bin 202 is at least communicated with the lower water storage bin header 201 through one lower connecting pipe 205, as shown in fig. 1-2.

In this embodiment, the upper descaling header 113 and the lower descaling header 203 are parallel to each other, the center line of the upper descaling header 113 and the center line of the lower descaling header 203 are parallel to the horizontal plane, the upper header mechanism 10 and the lower header mechanism 20 are mirror images of each other with respect to the horizontal plane, each upper connecting pipe 105 is provided with a solenoid valve 118, a regulating valve 119 and a flow meter 120, and the upper connecting pipe 105 has a hose section. A plurality of baffles are provided within upper descaling header 113 that divide upper descaling header 113 into a plurality of mutually independent and enclosed upper water distribution tanks 109, as shown in fig. 2. The sectionally controlled descaling header apparatus further comprises a lifting mechanism capable of independently moving the upper descaling header 113 and the lower descaling header 203 in the vertical direction, respectively.

The upper water diversion bin 109 in the upper descaling header 113 and the partition plates adopt a bilateral symmetry structure, meanwhile, the width of the middle partition plate is smaller than the minimum width of the blank 30, and meanwhile, the water diversion bins on the left side and the right side, which are close to the central water diversion bin, can be guaranteed to effectively cover the edges of the blank, so that the requirement of controlling descaling by the width of the minimum blank in a zoned manner is met. The center line of the upper descaling header 113 and the center line of the lower descaling header 203 are both in the same vertical plane; or the center line of upper descaling header 113 and the center line of lower descaling header 203 lie in different vertical planes, and the center line of upper descaling header 113 and the center line of lower descaling header 203 may be horizontally spaced apart.

In this embodiment, the lower portion of the upper descaling header 113 is provided with a water baffle 111 and at least one anti-collision plate 110, the water baffle 111 is arranged outside the upper descaling header 113, through holes corresponding to the upper nozzle assemblies 112 one by one are formed in the water baffle 111, the upper end of the anti-collision plate 110 is fixedly connected with the lower surface of the water baffle 111, the anti-collision plate 110 is located between two adjacent upper nozzle assemblies 112, the lower end of the anti-collision plate 110 is lower than the lower end of the upper nozzle assemblies 112, two side sealing plates 106 are sleeved outside the upper descaling header 113, and all the upper nozzle assemblies 112 are located between the two side sealing plates 106, as shown in fig. 1 to 7.

In this embodiment, each upper nozzle assembly 112 comprises a lower nozzle base 301, an upper nozzle base 302, a nozzle nut 303 and a nozzle head 304 connected in sequence along the diameter of the upper descaling header 113, one end of the lower nozzle base 301 is inserted into the upper descaling header 113, and the upper nozzle base 302, the nozzle nut 303 and the nozzle head 304 are located outside the upper descaling header 113. The water retaining cap 305 is sleeved outside the upper nozzle base 302, an annular boss is arranged outside the upper nozzle base 302, the water retaining cap 305 is of a cylindrical structure, the water retaining cap 305 comprises a ring segment 3051 and a cone segment 3052 which are sequentially connected, the top end of the cone segment 3052 is connected with the ring segment 3051, the bottom end of the cone segment 3052 faces the upper descaling header 113, the top end of the cone segment 3052 faces the nozzle head 304, and the ring segment 3051 is located between the annular boss of the upper nozzle base 302 and the nozzle nut 303, as shown in fig. 8 and 9.

The interconnection of the nozzle lower base 301 and the nozzle lower base aperture in the upper descaling header 113 is stepped. The lower nozzle base and the lower nozzle base hole adopt a welding connection mode, the butt joint part of the lower nozzle base and the lower nozzle base hole is in a step shape, the deviation of the angle of the descaling nozzle caused by shaking of hands of operators in the welding process is avoided, the sufficient lap joint amount of the surface of the steel plate is ensured, the descaling effect is ensured, the surface quality of the steel plate is improved, and the lower nozzle base hole can also adopt a threaded connection mode or other connection modes for fixed connection; the lower nozzle base and the upper nozzle base are connected in a threaded manner, and can be connected and fixed in other connection manners. The descaling nozzle is provided with a boss, the nozzle nut and the upper nozzle base are fixed in a threaded connection mode, after the nozzle nut 303 and the upper nozzle base 302 are screwed up, the upper end face of the descaling nozzle boss is contacted with the inner end face of the nozzle nut, the lower end face of the descaling nozzle boss is contacted with the sealing gasket 308, the lower end face of the sealing gasket 308 is contacted with one end face of the upper nozzle base 302, and the injection hole angle of the rotary descaling nozzle meets the production process requirement.

In this embodiment, the cone section 3052 is located below the water baffle 111, the distance between the bottom end of the cone section 3052 and the water baffle 111 is less than or equal to 2mm, the outer diameter of the bottom end of the cone section 3052 is greater than the inner diameter of the through hole of the water baffle 111, a gasket 306 and a fastening nut 307 are sequentially connected between the ring section 3051 of the water baffle cap 305 and the nozzle nut 303, and the fastening nut 307 and the nozzle nut 303 are both in threaded connection with the nozzle upper base 302, as shown in fig. 8 and 9.

In this embodiment, the water outlet of the nozzle head 304 is a slit structure, and the water outlet of the nozzle head 304 is capable of emitting a sheet-like water flow 309, the sheet-like water flow 309 being disposed obliquely with respect to the horizontal plane, and the direction of inclination of the sheet-like water flow 309 emitted from the upper nozzle assembly 112 located on the left side of the upper descaling header 113 being opposite to the direction of inclination of the sheet-like water flow 309 emitted from the upper nozzle assembly 112 located on the right side of the upper descaling header 113. The angle (α or β) between the laminar water flow 309 emitted from the nozzle head 304 and the horizontal plane may be 22 °, 26 °, 30 °, 40 °, or different angles may be selected according to the actual effect. The deflection angle of the nozzle is preferably 15 degrees, and can be between 6 degrees and 40 degrees according to actual requirements.

Specifically, as shown in fig. 10, the included angle between the left side nozzle outlet slot center line and the horizontal line is α degrees, the included angle between the right side nozzle outlet slot center line and the horizontal line is β degrees, and the center line of the middle nozzle coincides with the horizontal line. The high-pressure water sprayed by the two nozzles is distributed on the surface of the blank, a certain overlapping area exists on the surface of the blank, the width of the overlapping area can be adjusted to a certain extent by adjusting the distance between the nozzle outlet and the upper surface of the blank, the condition that the surface of the blank can be impacted by the high-pressure water completely is met, and the condition that the local temperature is reduced too quickly due to the fact that too many overlapping areas exist locally is avoided, so that the uniformity of the temperature on the surface of the blank is affected is avoided.

In this embodiment, the cross section of the baffle 111 is arc, the central angle corresponding to the arc is 180 °, the central line of the baffle 111 coincides with the central line of the upper descaling header 113, a space exists between the baffle 111 and the upper descaling header 113, the baffle 110 is crescent, and the upper end of the baffle 110 is welded with the lower surface of the baffle 111, as shown in fig. 6.

The breakwater and the anti-collision plate adopt an integral welding mode, and the installation, the maintenance and the replacement adopt an integral mode to facilitate the rapid maintenance and the replacement. The nozzle and the water retaining cap adopt independent installation modes, can be independently operated, and can not interfere with the water retaining plate and the anti-collision plate. The side sealing plates can effectively block high-pressure descaling water, avoid the high-pressure water from leaking to the outside of the descaling box, and ensure good sealing of the high-pressure water in the lifting process of the descaling header pipe, so that the sealing of the descaling box is always kept.

The lower descaling collecting pipe can be lifted under the action of the lifting mechanism, the distance between the outlet position of the nozzle of the lower collecting pipe and the lower end face of the blank can be adjusted, different descaling striking forces can be adjusted, meanwhile, the water baffle can effectively avoid the impact of the fallen iron scale on the nozzle, the flushing of the descaling collecting pipe caused by the reflection falling of high-pressure water can be avoided, and the service life of equipment can be effectively prolonged. An anti-collision plate is arranged on the upper descaling collecting pipe; the lower descaling collecting pipe can be optionally provided with an anti-collision plate or not; the side anti-collision plate can prevent the blank from striking the nozzle, and can prevent high-pressure water sprayed to the side sealing plates from reflecting to the nozzle on the header pipe, so that the nozzle can be effectively protected.

The upper and lower nozzle assemblies 112, 204 are capable of simultaneously spraying water to descale blanks 30 (e.g., billets) located between the upper and lower descaling headers 113, 203. The water baffle connected with the upper descaling header 113 covers the lower half of the upper header in the water spraying area, the water baffle connected with the lower descaling header 203 covers the upper half of the lower header in the water spraying area, the water baffle 111 is made of a high-temperature-resistant high-strength steel plate or other impact-resistant and high-temperature-resistant materials, the cross section of the water baffle is a circular arc cross section matched with the outer diameter of the descaling header, and through holes are formed in the water baffle 111 and at positions corresponding to the nozzle assemblies. Bolt holes are formed in the two end faces of the water baffle 111 in the length direction, and the water baffle is fixedly connected with the side sealing plates 106 through the bolt holes. The anti-collision plate 110 is in an arc-shaped cross section, and the anti-collision plate 110 and the water baffle 111 are fixedly connected in a welding mode; the side sealing plates 106 are welded with the descaling headers, the lowest point of the anti-collision plate 110 is lower than the nozzle nuts, and the anti-collision plate is impacted when the steel billet impacts, so that the nozzle is prevented from being impacted by the steel billet.

In this embodiment, a water inlet end cover 103 is welded outside one end of the upper water storage bin header 101, at least two water inlet holes are arranged in the water inlet end cover 103, a sealing end cover 121 is welded outside the other end of the upper water storage bin header 101, header end covers 107 are welded at both ends of the upper descaling header 113, and fastening bolt holes 114 are arranged outside the header end covers 107, as shown in fig. 2. At least 2 water inlets are formed in the water inlet end cover, and the water inlet adopts a horizontal and inclined pipeline mode to realize that high pressure is stably and uniformly fed into the water storage bin collecting pipe. The water inlet end cover is provided with a plurality of fastening bolt holes, and is connected with a water inlet pipeline by utilizing the bolt holes.

In this embodiment, a drain hole 115 is provided in the seal end cover 121, the drain hole 115 includes a horizontal section and a lower inclined section which are sequentially connected, the lower inclined section of the drain hole 115 is located at the inner side of the seal end cover 121, the horizontal section of the drain hole 115 is located at the outer side of the seal end cover 121, a valve 116 is connected to the outer side of the drain hole 115, and a fastening bolt hole 114 is provided outside the water inlet end cover 103 and the seal end cover 121. The upper water storage bin header 101 and the upper descaling header 113 are fixedly connected by utilizing bolt holes and flanges of an inlet hose connector, for example, a plurality of water through holes are formed in the circumferential curved surface of the upper water storage bin header 101, a connecting pipe 105 is connected with the upper water storage bin header 101 by utilizing a connecting flange 104, one end of the connecting pipe 105 is connected with an electromagnetic valve 118, an electric regulating valve 119 and a flowmeter 120, an outlet of the flowmeter is connected with the hose connector, and the other end of the hose connector is connected with the circumferential side wall of the upper descaling header 113.

Sediment and the like in the descaling header are discharged out of the water storage bin header by using a drain hole 115, the outlet position of the drain hole 115 is connected with a valve 116, the outlet end of the valve is sealed by using a sealing bolt 117, and the valve 116 is in a normally closed state. And (3) unloading the sealing bolt according to the time period of production and maintenance, opening the valve, flushing the pipeline by using low-pressure water in the pipeline, and clearing sediment in the header. The original direct welding mode of the blind plates at the end parts of the header is changed, and the integral forging pipe cap welding is adopted, so that the center of the header at the weld joint item of the header is transversely moved, and the cracking condition of the weld joint at the end part under the effects of pipeline pressure and high-pressure water flushing of the pipeline is avoided.

In the invention, the water storage bin header and the descaling header are connected through the connecting pipe, the electromagnetic valve, the flow regulating valve and the flowmeter are additionally arranged on the connecting pipe, the design of a plurality of water diversion bins is carried out on the descaling header, the control and the regulation of different water amounts of nozzles at different positions of the width of the blank are realized, meanwhile, the water diversion bins corresponding to the nozzles beyond the width of the blank are closed by the electromagnetic valve, the water spraying of the nozzles without water spraying of the descaling header is avoided, and the waste of treated water is avoided. Meanwhile, the upper descaling header 113 and the lower descaling header 203 are both arranged on the lifting mechanism, the distance between the outlet of the descaling realizing header nozzle and the upper and lower surfaces of the blanks can be adjusted, and the blanks with different thicknesses can realize the optimal descaling effect. The upper descaling header 113 and the lower descaling header 203 are both provided with a water baffle and an anti-collision plate, so that the nozzle and the header device are effectively protected, and the impact of the nozzle of the blank nozzle and the header is avoided. In addition, the sectionally controlled descaling header apparatus may also include a control unit (e.g., PLC) and sensors for detecting the size and position of the blanks.

The working process of the sectionally controlled descaling header device, namely the descaling method of the sectionally controlled descaling header device, is described below, and the descaling method of the sectionally controlled descaling header device comprises the following steps:

step 1, acquiring length, width, thickness and temperature data of a blank 30 from an upstream process and transmitting the length, width, thickness and temperature data to a PLC for scale removal control;

step 2, determining whether the position of the descaling header meets the process requirements according to the height of the blank and the distance requirement of the upper surface of the blank and the outlet of the descaling nozzle, and if the distance between the outlet of the upper header and the upper surface of the blank meets the process requirements, keeping the position of the upper header lifting mechanism motionless; if the distance between the outlet of the upper header nozzle and the upper surface of the blank does not meet the process requirement, the upper header lifting mechanism is adjusted until the distance reaching the process requirement is achieved, and the lifting mechanism is locked.

Step 3, calculating the descaling width: b=h- Δx-C, wherein the width of the blank cooling is B in mm; the actual width of the blank is H, and the unit is mm; the single nozzle spray width Deltax in mm; correction value C, in mm.

Step 4, detecting whether the center of the width of the blank is in the same vertical section as the center of the descaling header nozzle, if the two centers vertically coincide, the spray position of the nozzle does not need to be adjusted, and determining that the nozzle in the width B of the header corresponding to blank cooling is a spray nozzle; if the two central vertical sections deviate, determining a nozzle which takes the nozzle corresponding to the center of the width of the casting blank as the center and the nozzles with the total width of two sides as the injection nozzles for performing descaling operation according to the deviation amount of the two central vertical sections, opening an electromagnetic valve on a connecting pipeline of the water diversion bin and the water storage bin where the corresponding nozzle is positioned, and communicating a pipeline of the water storage bin and a pipeline of the water diversion bin.

Step 5, simultaneously calculating the descaling water demand quantity at different positions of the descaling width according to the temperature distribution of the width of the blank transferred by the upstream process, starting a descaling valve of a descaling system to perform nozzle descaling action, and simultaneously comparing the data of a flowmeter installed on a header with the descaling water demand quantity, wherein if the difference value of the data and the descaling water demand quantity is within an allowable fluctuation range, the flow regulating valve is not required to be regulated; if the difference value of the flow regulating valve and the scale removing water is larger than the allowable fluctuation range, the flow regulating valve is automatically regulated, the difference value between the actual flow and the scale removing water demand is in the allowable fluctuation range, and after the allowable fluctuation range is reached, the flow regulating valve is locked, so that the flow is prevented from fluctuation.

And 6, detecting the position of the blank according to the blank position detection device, closing a descaling valve of the automatic descaling pipe network system after the blank passes through the descaling position, and closing an electromagnetic valve to finish the descaling operation.

According to upstream production data, acquiring the width, length and thickness of the blank, determining whether the distance between a main body nozzle of a descaling header and the upper surface of the blank is a preset value, and if the actual height is smaller than the spraying height required by descaling, lifting the height of the descaling header by using a header lifting device to reach the spraying height required by descaling; if the actual height is larger than the spray height required by the descaling, the height of the descaling header is reduced by the header lifting device to reach the spray height required by the descaling.

According to the upstream production data, the width and temperature distribution of the blank are obtained, the width requirement of high-pressure water injection is calculated, the coverage width of high-pressure descaling water required by the blank and the descaling water quantity of different areas are determined by combining the height distance between the blank and the nozzle, according to the different temperature distribution of the width of the blank, different cooling loads of different positions in the width direction of the blank are calculated by a central processing unit according to a high-pressure water descaling cooling model, and then the high-pressure water consumption required by different positions in the width direction is determined, meanwhile, the flow meter detection data are referenced, and when the difference value between the actual flow of the high-pressure water and the high-pressure water requirement in a water diversion bin measured by the flow detection data is within an allowable fluctuation range, the regulating valve is not required to be regulated; when the deviation between the detection data of the flowmeter and the water demand of the water diversion bin exceeds the allowable fluctuation range, the online remote adjustment is implemented by using the adjusting valve, meanwhile, the detection flowmeter compares the measured water flow with the high-pressure water demand, when the deviation between the detection data of the flowmeter and the water demand of the water diversion bin reaches the allowable fluctuation range, the adjustment of the electric adjusting valve is stopped, and meanwhile, the position of the electric adjusting valve is locked, so that the fixation of the flow is realized. The fluctuation range of the difference value of the measured water flow and the high-pressure water demand is allowed to be manually preset, and different allowable fluctuation ranges can be set according to different specifications and requirements and aiming at different process conditions, so that different precision adjustments can be performed. The electromagnetic valve is utilized to open a high-pressure water passage between the water storage bin and the header pipe main body, so that the communication of a pipeline for high-pressure water injection is realized, when the blank reaches a preset position, the high-pressure water descaling valve system is automatically opened, the efficient descaling of the blank is realized, and the minimum high-pressure water consumption is consumed.

If the blank is in the condition of tail flicking or deviation in the running process of the roller way, the blank position monitoring device on the roller way is utilized to monitor the position and the running track of the blank, meanwhile, the electromagnetic valve is adjusted to control different nozzles to spray water, the surface of the blank can be covered by high-pressure water for descaling, and meanwhile, the nozzles without water spraying requirements are closed, so that the blank can be effectively closed, the waste of the high-pressure water is avoided, and meanwhile, the effective descaling of the blank is realized.

The process of the invention for descaling blanks of different widths, thicknesses and positions by the sectionally controlled descaling header device is described below.

When the thickness of the blank 30 is smaller, the relative positions of the upper descaling header 113 and the lower descaling header 203 can be adjusted by the upgrading mechanism, so that the distance between the outlet of the descaling nozzle and the upper and lower surfaces of the blank can be met, the process requirement can be met, and the optimal descaling effect can be realized. According to different technological requirements, the online adjustment of the distance between the nozzle outlet and the upper surface and the lower surface of the blank can be realized, and the requirement of continuous production of blanks with different thicknesses is met, as shown in fig. 11.

When the thickness of the blank 30 is in the maximum size specification, the spray nozzle is a central water diversion bin, one bin at the left side of the central water diversion bin and one bin at the right side of the central water diversion bin, and the three bins are adopted for water spraying, so that different positions of the width of the blank are met, different descaling water consumption is adopted, the uniformity of the temperature of the blank is realized, and the situation that the temperature of the edge is too low due to the fact that the edge is flushed by central high-pressure water is avoided, as shown in fig. 12.

When the blank 30 is in the widest dimension, the spray nozzles are the central water diversion bin and all the water diversion bins, and the water spraying action is performed by adopting a plurality of water diversion bins, so that different positions of the width of the blank are met, different descaling water consumption is adopted, the uniformity of the temperature of the blank is realized, and the situation that the temperature of the edge is too low due to the flushing of the central high-pressure water is avoided, as shown in fig. 13.

When the width of the blank 30 is between the minimum width and the maximum width, the selection of the spray position of the spray nozzle is calculated by the width of the blank, the position of the spray nozzle is determined, the position of the water diversion bin corresponding to the spray nozzle is determined, and then the position of the electromagnetic valve which needs to be opened is determined, and the electromagnetic valve is opened to communicate the corresponding water storage bin calculation and the water diversion bin, so that the spray descaling of the spray nozzle is realized, and the spray descaling of the spray nozzle is realized as shown in fig. 14.

When the center line of the blank 30 deviates from the center line of the header, the spray position of the spray nozzle is determined by the position of the center line of the blank, the spray width of the spray nozzle is determined by the width of the blank, the spray nozzle position is determined by the spray width, the corresponding water filling and water distributing bin position is further determined, the position of the opening electromagnetic valve is determined by the water filling and water distributing bin position, the header of the water storing bin is communicated with the water distributing bins, and the descaling operation of the upper surface and the lower surface of the blank is realized, as shown in fig. 15.

The foregoing description of the embodiments of the invention is not intended to limit the scope of the invention, so that the substitution of equivalent elements or equivalent variations and modifications within the scope of the invention shall fall within the scope of the patent. In addition, the technical features and the technical features, the technical features and the technical invention can be freely combined for use.

Claims

1. The descaling header device controlled in a sectional way is characterized by comprising an upper header mechanism (10) and a lower header mechanism (20) which are arranged up and down;

the upper header mechanism (10) comprises an upper water storage bin header (101) and an upper descaling header (113) which are arranged up and down, a plurality of mutually independent and closed upper water diversion bins (109) are arranged in the upper descaling header (113) along the central line direction of the upper descaling header (113), a plurality of upper nozzle assemblies (112) are arranged at the lower part of the upper descaling header (113), each upper water diversion bin (109) is at least communicated with one upper nozzle assembly (112), and each upper water diversion bin (109) is at least communicated with the upper water storage bin header (101) through one upper connecting pipe (105);

the lower header mechanism (20) comprises a lower descaling header (203) and a lower water storage bin header (201) which are arranged up and down, a plurality of mutually independent and closed lower water storage bins (202) are arranged in the lower descaling header (203) along the central line direction of the lower descaling header (203), a plurality of lower nozzle assemblies (204) are arranged at the upper part of the lower descaling header (203), each lower water storage bin (202) is at least communicated with one lower nozzle assembly (204), and each lower water storage bin (202) is at least communicated with the lower water storage bin header (201) through one lower connecting pipe (205);

the upper descaling collecting pipe (113) and the lower descaling collecting pipe (203) are parallel, the upper collecting pipe mechanism (10) and the lower collecting pipe mechanism (20) are mirror images, an electromagnetic valve (118), an adjusting valve (119) and a flowmeter (120) are arranged on the upper connecting pipe (105), and the upper connecting pipe (105) comprises a hose section; the sectionally controlled descaling header device further comprises a lifting mechanism, wherein the lifting mechanism can enable the upper descaling header (113) and the lower descaling header (203) to independently move along the vertical direction respectively;

the lower part of the upper descaling header (113) is provided with a water baffle (111) and at least one anti-collision plate (110), the water baffle (111) is arranged outside the upper descaling header (113), through holes corresponding to the upper nozzle assemblies (112) one by one are formed in the water baffle (111), the upper end of the anti-collision plate (110) is fixedly connected with the lower surface of the water baffle (111), the anti-collision plate (110) is positioned between two adjacent upper nozzle assemblies (112), the lower end of the anti-collision plate (110) is lower than the lower end of the upper nozzle assemblies (112), two side sealing plates (106) are sleeved outside the upper descaling header (113), and all the upper nozzle assemblies (112) are positioned between the two side sealing plates (106);

along the diameter direction of the upper descaling header (113), each upper nozzle assembly (112) comprises a nozzle lower base (301), a nozzle upper base (302), a nozzle nut (303) and a nozzle head (304) which are sequentially connected, one end of the nozzle lower base (301) is inserted into the upper descaling header (113), and the nozzle upper base (302), the nozzle nut (303) and the nozzle head (304) are all positioned outside the upper descaling header (113);

a water retaining cap (305) is sleeved outside the upper nozzle base (302), an annular boss is arranged outside the upper nozzle base (302), the water retaining cap (305) is of a cylindrical structure, the water retaining cap (305) comprises a ring segment (3051) and a cone segment (3052) which are sequentially connected, the top end of the cone segment (3052) is connected with the ring segment (3051), the bottom end of the cone segment (3052) faces towards the upper descaling header (113), the top end of the cone segment (3052) faces towards the nozzle head (304), and the ring segment (3051) is positioned between the annular boss of the upper nozzle base (302) and the nozzle nut (303);

the cone section (3052) is located the below of breakwater (111), and the distance is less than or equal to 2mm between the bottom of cone section (3052) and breakwater (111), and the external diameter of the bottom of cone section (3052) is greater than the internal diameter of breakwater (111) through-hole, contains gasket (306) and fastening nut (307) that connect gradually between the ring segment (3051) of manger plate cap (305) and nozzle nut (303), and fastening nut (307) and nozzle nut (303) all are connected with nozzle upper base (302) screw thread.

2. The segment-controlled descaling header apparatus according to claim 1, wherein the water outlet of the nozzle head (304) is of a slit structure, the water outlet of the nozzle head (304) is capable of emitting a sheet-like water flow (309), the sheet-like water flow (309) is disposed obliquely with respect to a horizontal plane, and the direction of inclination of the sheet-like water flow (309) emitted from the upper nozzle assembly (112) located on the left side of the upper descaling header (113) is opposite to the direction of inclination of the sheet-like water flow (309) emitted from the upper nozzle assembly (112) located on the right side of the upper descaling header (113).

3. The sectionally controlled descaling header device according to claim 1, wherein the cross section of the water baffle (111) is arc-shaped, the central angle corresponding to the arc is 180 degrees, the central line of the water baffle (111) coincides with the central line of the upper descaling header (113), a space exists between the water baffle (111) and the upper descaling header (113), the anti-collision plate (110) is crescent-shaped, and the upper end of the anti-collision plate (110) is welded with the lower surface of the water baffle (111).

4. The sectionally controlled descaling header device according to claim 1, wherein a water inlet end cover (103) is welded outside one end of the upper water storage bin header (101), at least two water inlet holes are formed in the water inlet end cover (103), a sealing end cover (121) is welded outside the other end of the upper water storage bin header (101), header end covers (107) are welded at two ends of the upper descaling header (113), and fastening bolt holes (114) are formed outside the header end covers (107).

5. The sectionally controlled descaling header device according to claim 4, wherein a drain hole (115) is provided in the seal end cap (121), the drain hole (115) comprises a horizontal section and a lower inclined section which are sequentially connected, the lower inclined section of the drain hole (115) is positioned at the inner side of the seal end cap (121), the horizontal section of the drain hole (115) is positioned at the outer side of the seal end cap (121), a valve (116) is connected to the outside of the drain hole (115), and a fastening bolt hole (114) is arranged outside the water inlet end cap (103) and the seal end cap (121).