A hot-rolled seamless steel pipe descaling device and method

Abstract

The application discloses a hot-rolled seamless steel pipe descaling device and method, and relates to the field of hot-rolled seamless steel pipe descaling devices. The hot-rolled seamless steel pipe descaling device comprises a base, a fixed plate, a rotating disc, a linear driving mechanism arranged on the base, a rotating mechanism, an inner supporting mechanism and a descaling assembly arranged on the base. The fixed plate is installed on the base and is suitable for being driven to move forward and backward on the base. The rotating disc is rotatably connected to the fixed plate. The linear driving mechanism is connected to the fixed plate to drive the fixed plate to move linearly. The rotating mechanism is installed on the fixed plate and connected to the rotating disc to drive the rotating disc to rotate. The inner supporting mechanism is installed on the rotating disc and is suitable for partially extending into the inner cavity of the steel pipe and supporting and limiting the inside of the steel pipe. The descaling assembly is located below the steel pipe supported by the inner supporting mechanism. The oxide scale is stripped by high-pressure water horizontal injection in a non-radial manner to impact the surface of the steel pipe, so that the impact on the base material of the steel pipe is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hot-rolled seamless steel pipe production, in particular to a hot-rolled seamless steel pipe descaling device and method. BACKGROUND

[0002] At present, in the production process of hot-rolled seamless steel pipe, the removal of oxide scale (scale) is a crucial link. The oxide scale is a layer of metal oxide formed on the surface of the steel pipe during hot rolling due to the chemical reaction between the steel pipe surface and oxygen in the air. If these oxide scales are not removed in time and effectively, it will have many adverse effects on the subsequent processing procedures and the final quality of the steel pipe.

[0003] After searching, it is found that the patent with the publication number CN220532627U discloses a descaling and cooling integrated machine. The patent is provided with annularly arranged descaling nozzles and cooling nozzles. The cooling nozzles are used to control the temperature of the steel pipe, and the descaling nozzles vertically spray descaling water to the surface of the steel pipe to achieve the effect of flushing the oxide scale. However, the principle of using high-pressure water vertical jet to strip the oxide scale is to use the strong impact force of the high-pressure water flow to directly act on the oxide scale on the surface of the steel pipe, so that it falls off from the substrate. On the one hand, when high-pressure water is vertically sprayed, the water flow will have a great impact on the steel pipe substrate, which can easily cause damage to the steel pipe substrate, resulting in defects such as concave and deformation on the surface of the steel pipe, affecting the dimensional accuracy and mechanical properties of the steel pipe. On the other hand, after the high-pressure water vertically impacts the surface of the steel pipe, it will splash in all directions, causing great waste of water resources, increasing production costs, and reducing descaling efficiency. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the defects in the prior art and provide a hot-rolled seamless steel pipe descaling device and method. The oxide scale is stripped by high-pressure water horizontal jet and non-radial impact on the surface of the steel pipe, reducing the impact on the steel pipe substrate.

[0005] To solve the above technical problems, the technical scheme of the present application is as follows: a hot-rolled seamless steel pipe descaling device, comprising:

[0006] a base;

[0007] a fixed plate, the fixed plate is installed on the base, and the fixed plate is suitable for being driven to move back and forth on the base;

[0008] a turntable, the turntable is rotatably connected to the fixed plate;

[0009] a linear drive mechanism arranged on the base, the linear drive mechanism is connected to the fixed plate to drive the fixed plate to move linearly;

[0010] a rotating mechanism, the rotating mechanism is installed on the fixed plate and connected to the turntable to drive the turntable to rotate;

[0011] An inner supporting mechanism is installed on the rotary table, and the inner supporting mechanism is adapted to partially extend into the inner cavity of the steel pipe and support and limit the inside of the steel pipe;

[0012] A descaling assembly is arranged on the base, and the descaling assembly is located below the steel pipe supported by the inner supporting mechanism and is adapted to spray a high-pressure water flow to the surface of the steel pipe; wherein:

[0013] The descaling assembly comprises a limiting plate and a water outlet pipe adapted to supply a high-pressure water source, the limiting plate is connected with the base, the limiting plate is provided with a water flow guide channel, the water outlet pipe is installed on the limiting plate and is in communication with the water flow guide channel, and the water flow guide channel comprises a first water outlet, and the high-pressure water flow sprayed from the first water outlet is arranged in parallel with the horizontal plane to non-radially impact the surface of the steel pipe.

[0014] Further, the limiting plate is provided with a flow distribution plate, the first water outlet is arranged on the flow distribution plate, the water flow guide channel further comprises a second water outlet arranged on the flow distribution plate, and the first water outlet is located above the second water outlet.

[0015] The water outlet pipe is connected with the flow distribution plate and is in communication with the first water outlet and the second water outlet, so as to introduce the high-pressure water flow into the first water outlet and the second water outlet respectively, the first water outlet is adapted to spray the high-pressure water flow to contact the part of the surface of the steel pipe, and the second water outlet is adapted to spray the high-pressure water flow to contact the rest of the surface of the steel pipe.

[0016] The first water outlet is covered with a converging pipe, and the converging pipe is adapted to avoid the dispersion of the high-pressure water flow sprayed from the first water outlet.

[0017] Further, the limiting plate is provided with an inclined portion, and the inclined portion is opposite to the position of the second water outlet.

[0018] The inclined portion is adapted to at least receive the high-pressure water flow sprayed from the second water outlet and guide the high-pressure water flow to the outer surface of the side of the steel pipe below and away from the water outlet pipe to flush the outer surface of the side of the steel pipe.

[0019] The inclined portion is provided with side baffles on both sides, and the side baffles on both sides are adapted to block the water flow changed in direction by the inclined portion to avoid the dispersion of the water flow to both sides.

[0020] Further, a water collecting cylinder is rotatably installed on the limiting plate, a plurality of circumferentially distributed stoppers are arranged on the outer peripheral wall of the water collecting cylinder, the water collecting cylinder is hollow, and a plurality of water passing holes are arranged on the outer peripheral wall of the water collecting cylinder.

[0021] The stopper is provided with a connecting part connected with the water collecting cylinder and a bent part provided on the other end of the connecting part, and one side of the connecting part is provided with an inclined surface;

[0022] The high pressure water jet sprayed from the second water outlet is guided by the inclined part to wash the surface of the steel pipe, and part of the water can contact the stopper and drive the water collecting cylinder to rotate, the stopper blocks the water flow and guides the water flow into the water passing hole on the water collecting cylinder through the inclined surface.

[0023] Further, the limiting plate is provided with an extension plate located in front of the limiting plate;

[0024] The limiting plate is provided with a drainage part adapted to guide part of the high pressure water flow discharged from the second water outlet into the extension plate, and the extension plate is provided with at least one top water outlet adapted to spray water in the extension plate to the surface of the steel pipe.

[0025] Further, a rotating sleeve is rotatably installed in the top water outlet, the rotating sleeve is hollow and provided with a through hole including an inner inlet and an outer outlet, the inner inlet is located in the extension plate, and the outer outlet is located outside the extension plate, the inner inlet is adapted to guide the water in the extension plate to be discharged through the outer outlet, the limiting plate is provided with a swing mechanism connected with the rotating sleeve to drive the rotating sleeve to swing, thereby expanding the water spraying area;

[0026] The swing mechanism includes a reciprocating screw rod, a transmission sleeve, a gear rack and an adjusting gear corresponding to the rotating sleeve, the reciprocating screw rod is coaxially connected with the water collecting cylinder, the transmission sleeve is assembled on the reciprocating screw rod, the gear rack is provided on the transmission sleeve, the adjusting gear is connected with the rotating sleeve, the adjusting gear is engaged with the gear rack, the reciprocating screw rod is adapted to rotate with the water collecting cylinder, thereby driving the transmission sleeve to reciprocate along the axis direction of the reciprocating screw rod, so as to drive the rotating sleeve to swing.

[0027] Further, at least one water collecting tank is provided on each side of the limiting plate, and the water collecting tank is provided with a side water inlet adapted to collect the water splashed to both sides after the high pressure water sprayed from the first water outlet contacts the steel pipe.

[0028] Further, the base is provided with a protection assembly located at the rear side of the limiting plate, and the protection assembly includes an air inlet ring with an air cavity, an air inlet pipe and a plurality of air outlet heads provided on the air inlet ring and connected with the air cavity.

[0029] The air inlet ring is connected with the base, the air inlet pipe is connected with the air cavity of the air inlet ring, the air inlet pipe is suitable for connecting with a nitrogen storage device and introducing nitrogen into the air cavity of the air inlet ring, and then the nitrogen is discharged from the air outlet head and acts on the surface of the steel pipe after descaling, and the nitrogen is suitable for forming an air curtain on the surface of the steel pipe to reduce the amount of high-pressure water sprayed from the first water outlet spout splashing in the direction of the air inlet ring.

[0030] Further, the air inlet ring is provided with a shunt pipe connected with the air cavity, the converging pipe is externally provided with an air outlet plate, the air outlet plate is internally provided with an air outlet cavity, the shunt pipe is connected with the air outlet cavity, the air outlet cavity is suitable for spraying the nitrogen introduced by the shunt pipe, and the sprayed nitrogen is located outside the high-pressure water sprayed from the first water outlet spout to be suitable for blowing off the descaling scale after the high-pressure water flow washes the surface of the steel pipe.

[0031] The application further discloses a hot-rolled seamless steel pipe descaling method adopting the hot-rolled seamless steel pipe descaling device.

[0032] S1, first, the inner supporting mechanism is started to support the inside of the steel pipe, and then the linear driving mechanism is started to drive the whole steel pipe to move to the position above the limiting plate;

[0033] S2, after the steel pipe moves to the position above the limiting plate, a high-pressure water source is supplied into the water outlet pipe, and high-pressure water flow is horizontally sprayed through the first water outlet spout to impact the surface of the steel pipe and descale the steel pipe;

[0034] S3, while the high-pressure water flow is sprayed to descale the steel pipe, the rotating mechanism is started to rotate the steel pipe to continuously contact the horizontally sprayed high-pressure water flow, so that the outer surface of the steel pipe is descaled;

[0035] S4, after the outer surface of the steel pipe is descaled, the linear driving mechanism is started to drive the part of the steel pipe not treated by the high-pressure water flow to move to the position above the limiting plate, and the descaling is continued.

[0036] By adopting the above technical scheme, the application has the following beneficial effects:

[0037] 1, by arranging the horizontally arranged limiting plate and the water outlet pipe, the high-pressure water is horizontally sprayed and non-radially impacts the surface of the steel pipe, the impact force on the steel pipe is reduced, the scale is stripped, the second water outlet spout is used to collect the splashing water flow, the water discharged through the second water outlet spout and the water splashed after contacting the steel pipe through the first water outlet spout are guided to the other side of the steel pipe under the action of the inclined part through the inclined part and the side baffle, and the water resource utilization rate is greatly improved, the descaling efficiency is improved, and the damage to the steel pipe substrate is reduced.

[0038] 2. The high-pressure water discharged from the second outlet and the water that splashes after contacting the steel pipe after being discharged from the first outlet are collected and then come into contact with the water collection cylinder. They are blocked by the baffle to prevent the high-pressure water from splashing. The water that is about to splash is blocked and then introduced into the water collection cylinder through the water passage hole, which effectively inhibits the splashing water from being evaporated at high temperature and reduces the waste of water resources.

[0039] 3. Water discharged from the second outlet is partially introduced into the extension plate through the diversion section and discharged through the top outlet. This pre-flushes the surface of the steel pipe that has not moved above the limit plate, ensuring that the subsequent water flow completely removes the oxide scale after impacting the steel pipe surface in a non-radial manner. At the same time, the water is mixed with the water splashed to the side and then used to flush the steel pipe. The rotating sleeve is driven to swing by the water flow through the water collection cylinder, which expands the spray range of the top outlet and reduces dead angles in descaling. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0041] Figure 2 This is a schematic diagram of the linear drive mechanism and the internal support mechanism of the present invention;

[0042] Figure 3 This is a schematic diagram of the rotating mechanism structure of the present invention;

[0043] Figure 4 This is a schematic diagram of the combined structure of the protection component and the descaling component of the present invention;

[0044] Figure 5 This is a schematic diagram of the descaling assembly structure of the present invention. Figure 1 ;

[0045] Figure 6 This is a schematic diagram of the descaling assembly structure of the present invention. Figure 2 ;

[0046] Figure 7 This is a schematic diagram of the swing mechanism structure of the present invention;

[0047] In the diagram: 1. Base; 11. Support roller; 12. Fourth motor;

[0048] 2. Descaling assembly; 21. Limiting plate; 22. Outlet pipe; 23. Diverter plate; 24. First outlet; 25. Second outlet; 26. Gathering pipe; 27. Inclined section; 28. Side baffle; 29. ​​Drainage section; 210. Extension plate; 211. Side inlet; 212. Water collection tank; 214. Top outlet; 215. Water collection cylinder; 216. Stop block; 217. Bending section; 218. Inclined surface; 219. Reciprocating screw; 220. Transmission sleeve; 221. Rack; 222. Adjusting gear; 223. Rotating sleeve;

[0049] 3, intake ring; 31, intake pipe; 32, outlet head; 33, shunt pipe; 34, outlet plate;

[0050] 4, linear drive mechanism; 41, first motor; 42, threaded rod; 43, fixed plate;

[0051] 5, rotating mechanism; 51, second motor; 52, driving gear; 53, driven gear;

[0052] 6, inner support mechanism; 61, turntable; 62, third motor; 63, bidirectional screw rod; 64, support block. DETAILED DESCRIPTION

[0053] In order to make the content of the application more easily and clearly understood, the application will be further described in detail below according to specific embodiments and in conjunction with the accompanying drawings.

[0054] Example one

[0055] As shown in the drawings, a hot-rolled seamless steel pipe descaling device comprises: Figures 1-4

[0056] Base 1;

[0057] Fixed plate 43, fixed plate 43 is installed on base 1, and fixed plate 43 is suitable for being driven to move back and forth on base 1;

[0058] Turntable 61, turntable 61 is rotatably connected to fixed plate 43;

[0059] Linear drive mechanism 4 provided on base 1, linear drive mechanism 4 is connected to fixed plate 43 to drive fixed plate 43 to move;

[0060] Rotating mechanism 5, rotating mechanism 5 is installed on fixed plate 43 and connected to turntable 61 to drive turntable 61 to rotate;

[0061] Inner support mechanism 6, inner support mechanism 6 is installed on turntable 61, and inner support mechanism 6 is suitable for partially extending into the inner cavity of the steel pipe and supporting and limiting the steel pipe;

[0062] Descaling assembly 2 provided on base 1, descaling assembly 2 is located below the steel pipe supported on inner support mechanism 6, and descaling assembly 2 is suitable for spraying high-pressure water flow to the surface of the steel pipe; wherein:

[0063] Descaling assembly 2 comprises limiting plate 21 and water outlet pipe 22 suitable for supplying high-pressure water source, limiting plate 21 is connected to base 1, limiting plate 21 is provided with water flow guide channel, water outlet pipe 22 is installed on limiting plate 21 and connected to water flow guide channel, and water flow guide channel comprises first water outlet 24, and the high-pressure water flow sprayed by first water outlet 24 is arranged in parallel with the horizontal plane to non-radially impact the surface of the steel pipe. ​

[0064] As Figure 1 , 2 shown, the first water outlet 24 sprays high-pressure water flow parallel to the horizontal plane to impact the lower surface of the steel pipe non-radially and at the lower end point of the vertical direction diameter of the steel pipe.

[0065] Specifically, in the present embodiment, the water outlet pipe 22 can be externally connected to a water storage device including a water storage tank, a high-pressure pump, a pressure relief valve and other components, which can stably spray high-pressure water flow. The specific structure and working principle of this part are not described in detail here.

[0066] As Figure 1 shown, the front end of the base 1 is the feeding end, and the rear end of the base 1 is the discharging end. The linear drive mechanism 4 moves the fixed plate 43 in the rear direction, thereby moving the rotating disc 61 and the inner support mechanism 6, so as to drive the steel pipe supported on the inner support mechanism 6 to be conveyed from the feeding end to the discharging end. The base 1 is provided with a plurality of support rollers 11 arranged at intervals, wherein the support roller 11 located at the end of the discharging end is provided with a fourth motor 12, and the output end of the fourth motor 12 is connected to the support roller 11 to drive the support roller 11 to rotate.

[0067] The steel pipe to be descaled is placed on the front support roller 11. When the linear drive mechanism 4 is actuated, the steel pipe can slide on the support roller 11. When the descaling of the steel pipe by the descaling assembly 2 is completed, the inner support mechanism 6 is loosened, the linear drive mechanism 4 is moved in the reverse direction to reset, the fourth motor 12 is started to drive the support roller 11 connected thereto to rotate, and the steel pipe is further moved by rotating to complete the discharging work.

[0068] As Figure 2 shown, the linear drive mechanism 4 includes a first motor 41 and a first screw-nut pair, and the first screw-nut pair includes a threaded rod 42 and a nut connected in cooperation. The first motor 41 is installed on the base 1, the threaded rod 42 is rotatably installed on the base 1, and the fixed plate 43 is assembled on the nut. The output end of the first motor 41 is connected to the threaded rod 42 to drive the threaded rod 42 to rotate, thereby driving the nut and the fixed plate 43 thereon to move linearly along the axis of the threaded rod 42.

[0069] As Figure 2 shown, the inner support mechanism 6 includes a third motor 62, a bidirectional screw rod 63, and two support blocks 64. The third motor 62 is installed on the rotating disc 61, the bidirectional screw rod 63 is rotatably installed in the rotating disc 61, and the two support blocks 64 are assembled on the opposite threads of the two sections of the bidirectional screw rod 63, respectively. The output end of the third motor 62 is connected to the bidirectional screw rod 63 to drive the bidirectional screw rod 63 to rotate, thereby driving the two support blocks 64 to move towards or away from each other.

[0070] As shown in Figure 3 The rotating mechanism 5 comprises a second motor 51, a driving gear 52 and a driven gear 53, the driving gear 52 and the driven gear 53 are both rotatably installed on the fixed plate 43, the driving gear 52 and the driven gear 53 are engaged, the driven gear 53 is connected with the rotating disc 61, and the output end of the second motor 51 is connected with the driving gear 52 to drive the driven gear 53 to rotate, thereby driving the rotating disc 61 to rotate.

[0071] When the descaling work is needed, the third motor 62 is started to rotate forward, the bidirectional screw rod 63 under forward rotation drives the two supporting blocks 64 to move away from each other to support the inner wall of the steel pipe, after the inner supporting mechanism 6 supports the inner wall of the steel pipe, when the steel pipe needs to move linearly on the base 1, the first motor 41 is started to drive the threaded rod 42 to rotate forward, the threaded rod 42 drives the fixed plate 43 to move linearly to the discharge end, the fixed plate 43 drives the rotating disc 61, the entire rotating mechanism 5 and the inner supporting mechanism 6 to move synchronously, thereby driving the steel pipe to move, when the steel pipe moves to the descaling assembly 2, the oxide scale is stripped under the scouring of the high-pressure water flow, in this process, the second motor 51 is started to drive the driving gear 52 to rotate, the rotating disc 61 is rotated through the engagement of the driving gear 52 and the driven gear 53, thereby driving the entire inner supporting mechanism 6 and the steel pipe to rotate, so that the oxide scale on the outer surface of the steel pipe is stripped by the high-pressure water flow, when the steel pipe needs to be loosened after the entire descaling work is completed, the third motor 62 is reversed to move the two supporting blocks 64 towards each other to loosen the steel pipe, and the reset of the fixed plate 43 is realized by reversing the first motor 41.

[0072] As shown in Figure 5 The limiting plate 21 is provided with a shunt plate 23, the first water outlet 24 is formed on the shunt plate 23, and the water flow guide channel further comprises a second water outlet 25 formed on the shunt plate 23, and the first water outlet 24 is located above the second water outlet 25.

[0073] The water outlet pipe 22 is connected with the shunt plate 23 and communicates with the first water outlet 24 and the second water outlet 25, so as to respectively introduce the high-pressure water flow into the first water outlet 24 and the second water outlet 25, the first water outlet 24 is adapted to spray the high-pressure water flow to contact with part of the surface of the steel pipe, and the second water outlet 25 is adapted to spray the high-pressure water flow to contact with the rest of the surface of the steel pipe, and can collect the water splashed along the surface of the steel pipe downward or splashed by the high-pressure water flow sprayed by the first water outlet 24 after contacting with the steel pipe.

[0074] The water outlet end of the first water outlet 24 is covered with a converging pipe 26, which is adapted to avoid the dispersion of the high-pressure water sprayed from the first water outlet 24.

[0075] The water outlet pipe 22 is connected to the center part of the diversion plate 23. After the water outlet pipe 22 injects high-pressure water into the diversion plate 23, the water flow is split into the first water outlet 24 in the upper position and the second water outlet 25 in the lower position within the diversion plate 23. The water outlet ends of the first water outlet 24 and the second water outlet 25 are respectively provided with nozzles. The nozzles can be round or needle-shaped. The nozzles can stably spray out a round water column to increase the impact force during descaling.

[0076] like Figure 6 As shown, the limiting plate 21 is provided with an inclined part 27, which is positioned opposite to the second outlet 25.

[0077] The inclined portion 27 is adapted to receive at least the high-pressure water flow ejected from the second outlet 25 and direct the high-pressure water flow to the outer surface of the steel pipe on the side away from the outlet pipe 22 to flush the outer surface of the steel pipe on that side.

[0078] Of course, the inclined section 27 can also receive the water discharged after the first outlet 24 impacts the steel pipe.

[0079] Side baffles 28 are provided on both sides of the inclined section 27. The side baffles 28 on both sides can block the water flow after the flow direction is changed by the inclined section 27, so as to prevent the water flow from spreading to both sides.

[0080] like Figure 7 As shown, a water collecting cylinder 215 is rotatably mounted on the limiting plate 21. Several circumferentially distributed baffles 216 are provided on the outer peripheral wall of the water collecting cylinder 215. The water collecting cylinder 215 is hollow, and several water passage holes are opened on the outer peripheral wall of the water collecting cylinder 215. In this embodiment, the baffles 216 can prevent the water flow through the inclined part 27 from splashing onto the rest of the steel pipe after rinsing it.

[0081] Specifically, in this embodiment, the stop block 216 is provided with a connecting part that is connected to the water collection cylinder 215 at one end and a bent part 217 provided on the other end of the connecting part, and an inclined surface 218 is provided on one side of the connecting part.

[0082] In this embodiment, the inclined surface 218 is adapted to guide the water flow that rushes to the connection to the water passage hole, and the bent part 217 is adapted to block the water flow that moves radially outward in the water collection cylinder 215.

[0083] The high-pressure water jet from the second outlet 25 is guided by the inclined part 27 to flush the surface of the steel pipe. After flushing, some of the water can contact the baffle 216 and drive the water collection cylinder 215 to rotate. The baffle 216 blocks the contacting water and introduces it into the water passage hole on the water collection cylinder 215 through the inclined surface 218.

[0084] The base 1 is provided with a water accumulation groove and a drain pipe, the limiting plate 21 is provided with a cavity for installing the water collecting cylinder 215, the cavity is connected with the water accumulation groove through a first water pipe, the drain pipe is connected with the first water pipe, the water blocked by the limiting plate 21 will enter the water collecting cylinder 215 through the water passing hole and then fall into the cavity for collecting, the water in the cavity will enter the water accumulation groove through the first water pipe and finally be discharged to the outside of the base 1 through the drain pipe, the collected water can be reused, and the filter screen arranged in the drain pipe can avoid the oxide skin from entering the collected water.

[0085] The working principle of the embodiment is as follows:

[0086] Firstly, the steel pipe is placed on the supporting roller 11 at the feeding end, the inner wall of the steel pipe is supported by the inner supporting mechanism 6, then the linear driving mechanism 4 is started to drive the steel pipe to move linearly, until the steel pipe moves above the limiting plate 21, the linear driving mechanism 4 stops working, at this time, the high-pressure pump in the water storage device is started to make the water outlet pipe 22 start to spray high-pressure water flow, the limiting plate 21 and the water outlet pipe 22 are both horizontally arranged, therefore the spraying direction of the high-pressure water flow sprayed through the first water outlet 24 is also horizontal, the high-pressure water flow sprayed horizontally is used to flush the surface below the steel pipe to strip the oxide skin on the steel pipe, at this time, the rotating mechanism 5 is started to drive the steel pipe to rotate as a whole, so that the high-pressure water flow sprayed through the first water outlet 24 can strip the oxide skin on the surface of the steel pipe in a circle, after one circle of the steel pipe is completed to remove the scale, the linear driving mechanism 4 is continued to be started to drive the steel pipe to move to the discharging end by a distance, so that the part of the steel pipe which has not been stripped of the scale is located above the limiting plate 21, then the rotating mechanism 5 is started to drive the steel pipe to rotate to contact with the sprayed high-pressure water flow to complete the scale removal work in a new circle on the steel pipe, and the steel pipe is treated to remove the scale week after week;

[0087] The high-pressure water jet sprayed from the first water outlet 24 scours the surface of the steel pipe. Part of the water jet scatters and splashes after impacting the steel pipe, and part of the water jet flows down the pipe wall. To avoid the waste of the water jet flowing down the pipe wall and splashing, the second water outlet 25 also sprays a high-pressure water jet when the first water outlet 24 sprays a high-pressure water jet. The high-pressure water jet sprayed from the second water outlet 25 does not directly contact the lower part of the steel pipe, and the water jet sprayed from the second water outlet 25 is located below the water jet sprayed from the first water outlet 24. The water jet flowing down the pipe wall and splashing downward after the high-pressure water jet sprayed from the first water outlet 24 contacts the steel pipe mixes with the high-pressure water jet sprayed from the second water outlet 25 and is driven to flow to the inclined part 27. The high-pressure water jet sprayed from the second water outlet 25, together with part of the water jet sprayed from the first water outlet 24, impacts the inclined part 27. The flow direction of the mixed water jet is changed under the action of the inclined angle of the inclined part 27, so that the mixed water jet scours the outer surface of the side of the lower part of the steel pipe away from the water outlet pipe 22 along the inclined direction of the inclined part 27. In cooperation with the first water outlet 24 spraying to scour the lower part of the steel pipe, the two positions of the steel pipe can be simultaneously descaled. Under the driving of the rotating mechanism 5, the steel pipe is simultaneously scoured by the two water jets, which improves the descaling efficiency and avoids the situation that dead angles cannot be processed. The side baffles 28 arranged on both sides of the inclined part 27 can limit the flow direction of the mixed water jet and reduce the leakage of the mixed water jet. It should be noted that the side baffles 28 do not directly contact the steel pipe, so a small part of the mixed water jet leaks during the flow and scouring process, and most of the mixed water jet acts on the surface of the steel pipe.

[0088] To avoid the water splashing after the mixed water jet scours the steel pipe from splashing to the remaining part of the steel pipe, the water collecting cylinder 215 is arranged. The water after scouring the steel pipe contacts the inclined surface 218 in the blocking piece 216 on the water collecting cylinder 215. The inclined surface 218 is inclined to the central axis of the water collecting cylinder 215. The water impacting the inclined surface 218 flows downward and passes through the water hole into the water collecting cylinder 215, and is finally received by the water storage tank. The water collecting cylinder 215 rotates under the continuous scouring of the water flow. Each blocking piece 216 can block the water flow and guide the water flow into the water collecting cylinder 215 during rotation.

[0089] Embodiment Two

[0090] As shown in Figure 6 , the embodiment further includes the following structure on the basis of embodiment one: the limiting plate 21 is provided with an extension plate 210, and the extension plate 210 is located in front of the limiting plate 21, that is, the extension plate 210 is located on the side of the limiting plate 21 close to the feeding end;

[0091] The limiting plate 21 is provided with a drainage part 29, which is suitable for guiding part of the high-pressure water flow discharged from the second water outlet 25 into the extension plate 210. The extension plate 210 is provided with at least one top water outlet 214, which is suitable for spraying the water in the extension plate 210 to the surface of the steel pipe.

[0092] Of course, in the present embodiment, the water in the extension plate 210 not only includes the water guided into it by the drainage part 29, but also includes the water splashed to the top water outlet 214 after the high-pressure water flow sprayed from the first water outlet 24 impacts the surface of the steel pipe.

[0093] As shown in Figures 6-7 , the top water outlet 214 is rotatably provided with a rotating sleeve 223. The rotating sleeve 223 is hollow and provided with a through hole, which includes an inner inlet and an outer outlet. The inner inlet is located in the extension plate 210, and the outer outlet is located outside the extension plate 210. The inner inlet is suitable for guiding the water in the extension plate 210 to be discharged through the outer outlet. The limiting plate 21 is provided with an oscillating mechanism, which is connected to the rotating sleeve 223 to drive the rotating sleeve 223 to oscillate, thereby expanding the water spraying area. In addition, the rotating sleeve 223 and the top water outlet 214 can be rotatably sealed to prevent the water in the extension plate 210 from being discharged from other parts of the outer outlet.

[0094] The oscillating mechanism includes a reciprocating screw rod 219, a transmission sleeve 220, a rack 221, and an adjusting gear 222 corresponding to the rotating sleeve 223. The reciprocating screw rod 219 is coaxially connected to the water collecting cylinder 215. The transmission sleeve 220 is assembled on the reciprocating screw rod 219. The rack 221 is provided on the transmission sleeve 220. The adjusting gear 222 is connected to the rotating sleeve 223. The adjusting gear 222 is engaged with the rack 221. The reciprocating screw rod 219 is suitable for rotating with the water collecting cylinder 215, thereby driving the transmission sleeve 220 to reciprocate along the axis of the reciprocating screw rod 219, and driving the rotating sleeve 223 to oscillate.

[0095] The water collecting cylinder 215 rotates under the push of the water flow, thereby driving the reciprocating screw rod 219 to rotate. The reciprocating screw rod 219 drives the transmission sleeve 220 to reciprocate along the axis of the reciprocating screw rod 219, thereby driving the rack 221 to reciprocate. Under the engagement of the rack 221 and the adjusting gear 222, the rotating sleeve 223 in the top water outlet 214 continuously oscillates.

[0096] As shown in Figure 4 , Figure 6 , at least one water collecting tank 212 is provided on each side of the limiting plate 21. The water collecting tank 212 is provided with a side water inlet 211, which is suitable for collecting the water splashed to both sides after the high-pressure water sprayed from the first water outlet 24 contacts the steel pipe.

[0097] A second water pipe is arranged on the water collecting tank 212, and the second water pipe can guide the water in the water collecting tank to the water collecting groove for unified collection.

[0098] The working principle of the embodiment is as follows:

[0099] After the high-pressure water flow is sprayed from the second water outlet 25, part of the water flow mixes with part of the water sprayed from the first water outlet 24 and flows to the inclined part 27, and part of the water flow flows into the extension plate 210 under the guidance of the flow guide part 29 and is sprayed from the top water outlet 214 to impact and descale the steel pipe, thereby improving the range of one-time descaling. When the steel pipe is driven to rotate by the rotating mechanism 5, the water flow sprayed from the top water outlet can first pretreat the corresponding range of the steel pipe, and the water sprayed from the first water outlet 24 and the second water outlet 25 has a higher scouring efficiency on the oxide skin of the steel pipe. After the high-pressure water flow sprayed from the first water outlet 24 acts on the surface of the steel pipe, the splashed water toward the extension plate 210 is collected with the water sprayed from the top water outlet 214, thereby improving the utilization rate of water resources.

[0100] To avoid damage to the base material of the steel pipe caused by the vertical spraying of the top water outlet 214 and to improve the spraying range of the top water outlet 214, a swing mechanism is arranged. The water flow whose flow direction is changed by the inclined part 27 continuously rotates the water collecting cylinder 215, the rotation of the water collecting cylinder 215 drives the entire swing mechanism to work, the rotating sleeve 223 in the top water outlet 214 continuously swings, thereby improving the spraying range of the top water outlet 214 and avoiding damage caused by long-time vertical spraying of the steel pipe.

[0101] In addition to being mixed with the water sprayed from the top water outlet 214 and acting on the steel pipe, part of the splashed water after the high-pressure water flow sprayed from the first water outlet 24 acts on the steel pipe enters the corresponding side water collecting tank 212 through the side water inlet 211, and the splashed water toward the position where the extension plate 210 is not arranged also enters the corresponding side water collecting tank 212 through the side water inlet 211 and is collected. This arrangement can collect part of the splashed water to reduce water consumption.

[0102] Embodiment Three

[0103] As shown in Figure 4 the embodiment, the embodiment further includes the following structure on the basis of the first embodiment: the base 1 is provided with a protection assembly located at the back side of the limiting plate 21, and the protection assembly includes an air inlet ring 3 with an air cavity, an air inlet pipe 31, and a plurality of air outlet heads 32 arranged on the air inlet ring 3 and connected with the air cavity of the air inlet ring 3.

[0104] The air intake ring 3 is connected to the base 1, and the air intake pipe 31 is connected to the air chamber of the air intake ring 3. The air intake pipe 31 is suitable for connecting an external nitrogen storage device and introducing nitrogen into the air chamber of the air intake ring 3, so that the nitrogen is discharged from the air outlet 32 ​​and acts on the surface of the steel pipe after descaling. The nitrogen is suitable for forming an air curtain on the surface of the steel pipe to reduce the amount of high-pressure water sprayed from the first water outlet 24 splashing towards the air intake ring 3 after contacting the steel pipe.

[0105] The nitrogen storage device includes components such as a high-pressure gas cylinder that provides pure nitrogen, a pressure reducing valve, and a control valve. Its main function is to store nitrogen and spray it out through the outlet 32 ​​to achieve the effect of spraying nitrogen. The specific structure and working principle of this part are existing technologies and will not be described in detail here.

[0106] like Figure 4 As shown, the air intake ring 3 is provided with a diverter pipe 33 that communicates with the air chamber, and the outside of the converging pipe 26 is provided with an air outlet plate 34. The air outlet plate 34 is provided with an air outlet chamber. The diverter pipe 33 is connected to the air outlet chamber. The air outlet chamber is suitable for spraying out the nitrogen introduced by the diverter pipe 33. The sprayed nitrogen is located outside the high-pressure water sprayed from the first water outlet 24 so as to blow away the oxide scale after the high-pressure water flow washes the surface of the steel pipe.

[0107] The working principle of this embodiment is as follows:

[0108] After the nitrogen storage device is activated, nitrogen is charged into the air inlet ring 3 and then sprayed onto the surface of the steel pipe through the air outlet 32. The air inlet ring 3 is located on the side near the discharge end. After each descaling treatment of the steel pipe is completed, the treated part is moved above the air inlet ring 3 under the drive of the linear drive mechanism 4, so that the air outlet 32 ​​can spray nitrogen onto the surface of the descaled steel pipe to avoid the rapid oxidation of the descaled steel pipe and the regeneration of oxide scale. At the same time, as the high-pressure nitrogen is sprayed onto the surface of the steel pipe, it forms an air curtain as the steel pipe rotates under the drive of the rotating mechanism 5. This can reduce the splashing of water flow towards the air inlet ring 3 after the high-pressure water flow impacts the surface of the steel pipe to a certain extent.

[0109] Part of the nitrogen gas charged into the air intake ring 3 will be diverted to the air outlet plate 34 through the diverter pipe 33. The air outlet plate 34 is located outside the converging pipe 26. When the high-pressure water discharged from the first outlet 24 is sprayed out through the converging pipe 26, the air outlet plate 34 will also spray out nitrogen gas. The nitrogen gas is located outside the water column. When the high-pressure water droplets act on the steel pipe, the nitrogen gas will also be sprayed on the surface of the steel pipe. It can blow away the oxide scale when the high-pressure water descaling is carried out, and prevent the oxide scale from re-adhering to the surface of the steel pipe. At the same time, it can suppress the violent scattering and splashing of the high-pressure water sprayed from the first outlet 24 after contacting the steel pipe. The water that is not splashed after being blocked by the nitrogen gas will fall downwards and mix with the high-pressure water discharged from the second outlet 25 and contact the inclined part 27. Finally, it will be used again to flush the surface of the steel pipe.

[0110] Embodiment four

[0111] The embodiment also provides a method for descaling hot-rolled seamless steel pipes, which is implemented based on the embodiment one or the embodiment two or the embodiment three, and the method comprises the following steps:

[0112] S1, starting the inner supporting mechanism 6 to support the inside of the steel pipe, and then starting the linear driving mechanism 4 to drive the steel pipe to move to the position above the limiting plate 21;

[0113] S2, after the steel pipe moves to the position above the limiting plate 21, supplying the high-pressure water source into the water outlet pipe 22, and spraying the high-pressure water flow horizontally through the first water outlet 24 to impact the surface of the steel pipe and descale the steel pipe;

[0114] S3, while spraying the high-pressure water flow to descale the steel pipe, starting the rotating mechanism 5 to rotate the steel pipe, so that the steel pipe is continuously contacted with the horizontally sprayed high-pressure water flow, and then the outer surface of the steel pipe is descaled;

[0115] S4, after the outer surface of the steel pipe is descaled, starting the linear driving mechanism 4 to drive the part of the steel pipe which is not treated by the high-pressure water flow to move to the position above the limiting plate 21, and then the descaling is continuously performed.

[0116] The above embodiment further describes the technical problems, technical solutions and beneficial effects solved by the present application in detail. It should be understood that the above embodiment is only a specific embodiment of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A descaling device for hot-rolled seamless steel pipes, characterized by comprising: The utility model relates to a steel pipe descaling device, including: a base (1); a fixed plate (43) mounted on the base (1), the fixed plate (43) being adapted to be driven to move forward and backward on the base (1); a rotating disc (61) rotatably connected to the fixed plate (43); a linear drive mechanism (4) provided on the base (1) and connected to the fixed plate (43) to drive the fixed plate (43) to move linearly; a rotating mechanism (5) mounted on the fixed plate (43) and connected to the rotating disc (61) to drive the rotating disc (61) to rotate; an inner supporting mechanism (6) mounted on the rotating disc (61), the inner supporting mechanism (6) being adapted to partially extend into the inner cavity of the steel pipe and support the inner part of the steel pipe; a descaling assembly (2) provided on the base (1) and located below the steel pipe supported by the inner supporting mechanism (6), the descaling assembly (2) being adapted to spray high-pressure water flow to the surface of the steel pipe; wherein: the descaling assembly (2) includes a limiting plate (21) and a water outlet pipe (22) adapted to supply a high-pressure water source, the limiting plate (21) is connected to the base (1), the limiting plate (21) is provided with a water flow guide channel, the water outlet pipe (22) is mounted on the limiting plate (21) and communicates with the water flow guide channel, the water flow guide channel includes a first water outlet (24), the high-pressure water flow sprayed from the first water outlet (24) is arranged in parallel with the horizontal plane to non-radially impact the surface of the steel pipe; the limiting plate (21) is provided with a shunt plate (23), the first water outlet (24) is formed in the shunt plate (23), the water flow guide channel further includes a second water outlet (25) formed in the shunt plate (23), the first water outlet (24) is located above the second water outlet (25); the water outlet pipe (22) is connected to the shunt plate (23) and communicates with the first water outlet (24) and the second water outlet (25) to introduce the high-pressure water flow into the first water outlet (24) and the second water outlet (25) respectively, the first water outlet (24) is adapted to spray high-pressure water flow to contact part of the surface of the steel pipe, the second water outlet (25) is adapted to spray high-pressure water flow to contact the rest of the surface of the steel pipe; the limiting plate (21) is provided with an inclined part (27), the inclined part (27) is opposite to the position of the second water outlet (25); the inclined part (27) is adapted to receive at least the high-pressure water flow sprayed from the second water outlet (25) and guide the high-pressure water flow to the outer surface of the side of the steel pipe below and away from the water outlet pipe (22) to flush the outer surface of the side of the steel pipe; the limiting plate (21) is provided with an extension plate (210), the extension plate (210) is located in front of the limiting plate (21). The limiting plate (21) is provided with a drainage part (29) suitable for guiding the high-pressure water flow part discharged from the second water outlet (25) into the extension plate (210), and the extension plate (210) is provided with at least one top water outlet (214) suitable for spraying the water in the extension plate (210) to the surface of the steel pipe. The water flow sprayed from the second water outlet (25) is located below the water flow sprayed from the first water outlet (24), and the high-pressure water flow sprayed from the first water outlet (24) mixes with the water flow sprayed from the second water outlet (25) to form a mixed water flow after being contacted with the steel pipe, and the mixed water flow is driven to flow to the inclined part (27), and the flow direction of the mixed water flow is changed under the action of the inclined angle of the inclined part (27), so that the mixed water flow is washed to the outer surface of the side of the steel pipe away from the water outlet pipe (22) in the inclined direction of the inclined part (27).

2. The hot-rolled seamless steel pipe descaling device according to claim 1, characterized in that, The water outlet end of the first water outlet (24) is covered with a converging pipe (26) suitable for avoiding the dispersion of the high-pressure water sprayed from the first water outlet (24).

3. The hot-rolled seamless steel pipe descaling device according to claim 1, characterized in that, The two sides of the inclined part (27) are provided with side baffles (28) suitable for blocking the water flow after the flow direction is changed by the inclined part (27) to avoid the dispersion of the water flow to the two sides.

4. The hot-rolled seamless steel pipe descaling device according to claim 1, characterized in that, The limiting plate (21) is provided with a water collecting cylinder (215) rotatably installed thereon, the outer peripheral wall of the water collecting cylinder (215) is provided with a plurality of circumferentially distributed stop blocks (216), the water collecting cylinder (215) is hollow, and a plurality of water passing holes are formed in the outer peripheral wall of the water collecting cylinder (215); The stop block (216) is provided with a connecting portion connected to the water collecting cylinder (215) and a bent portion (217) provided on the other end of the connecting portion, and one side of the connecting portion is provided with an inclined surface (218); The high-pressure water flow sprayed from the second water outlet (25) is guided by the inclined part (27) to wash the surface of the steel pipe, and part of the water flow after washing is suitable for contacting the stop block (216) and driving the water collecting cylinder (215) to rotate, the stop block (216) blocks the water flow in contact and guides the water flow into the water passing holes in the water collecting cylinder (215) through the inclined surface (218).

5. The hot-rolled seamless steel pipe descaling device according to claim 4, characterized in that, The top water outlet (214) is rotatably provided with a rotating sleeve (223), the rotating sleeve (223) is hollow and provided with a through hole, the through hole includes an inner inlet and an outer outlet, the inner inlet is located in the extension plate (210), and the outer outlet is located outside the extension plate (210), the inner inlet is suitable for guiding the water in the extension plate (210) to be discharged through the outer outlet, and the limiting plate (21) is provided with a swinging mechanism connected with the rotating sleeve (223) to drive the rotating sleeve (223) to swing, thereby expanding the water spraying area. The swing mechanism comprises a reciprocating wire rod (219), a transmission sleeve (220), a rack (221), and an adjusting gear (222) corresponding to the rotating sleeve (223), the reciprocating wire rod (219) is coaxially connected with the water collecting cylinder (215), the transmission sleeve (220) is assembled on the reciprocating wire rod (219), the rack (221) is arranged on the transmission sleeve (220), the adjusting gear (222) is connected with the rotating sleeve (223), the adjusting gear (222) is engaged with the rack (221), and the reciprocating wire rod (219) is adapted to rotate with the water collecting cylinder (215), thereby driving the transmission sleeve (220) to reciprocate along the axis direction of the reciprocating wire rod (219), so as to drive the rotating sleeve (223) to swing.

6. The descaling device according to claim 1 or 5, characterized in that At least one water collecting tank (212) is arranged on each side of the limiting plate (21), and a side water inlet (211) is formed in the water collecting tank (212), which is adapted to collect water splashed to both sides after high-pressure water sprayed from the first water outlet (24) contacts with the steel pipe.

7. The hot-rolled seamless steel pipe descaling device according to claim 2, characterized in that, A protection assembly is arranged on the base (1) and located at the rear side of the limiting plate (21), and the protection assembly comprises an air inlet ring (3) with an air cavity, an air inlet pipe (31), and a plurality of air outlet heads (32) arranged on the air inlet ring (3) and connected with the air cavity. The air inlet ring (3) is connected with the base (1), the air inlet pipe (31) is connected with the air cavity of the air inlet ring (3), the air inlet pipe (31) is adapted to be connected with a nitrogen storage device and introduce nitrogen into the air cavity of the air inlet ring (3), so that the nitrogen is discharged from the air outlet heads (32) and acts on the surface of the steel pipe after descaling, and the nitrogen is adapted to form an air curtain on the surface of the steel pipe to reduce the amount of high-pressure water sprayed from the first water outlet (24) splashing to the air inlet ring (3) after contacting with the steel pipe.

8. The hot-rolled seamless steel tube descaling device according to claim 7, characterized in that A shunt pipe (33) is arranged on the air inlet ring (3) and connected with the air cavity, the converging pipe (26) is externally provided with an air outlet plate (34), the air outlet plate (34) is internally provided with an air outlet cavity, the shunt pipe (33) is connected with the air outlet cavity, the air outlet cavity is adapted to spray the nitrogen introduced by the shunt pipe (33), and the sprayed nitrogen is located outside the high-pressure water sprayed from the first water outlet (24) to be adapted to blow off the descaling scale after the high-pressure water flow washes the surface of the steel pipe.

9. A method of descaling a hot-rolled seamless steel pipe using the descaling device according to any one of claims 1 to 8, characterized in that, The method comprises the following steps S1, first, the inner supporting mechanism (6) is started to support the inside of the steel pipe, and then the linear driving mechanism (4) is started to drive the whole steel pipe to move to the limiting plate (21); S2, after the steel pipe moves above the limiting plate (21), a high-pressure water source is supplied into the water outlet pipe (22), and high-pressure water flow is horizontally sprayed through the first water outlet (24) to impact the surface of the steel pipe and descale the steel pipe. S3, while the high-pressure water jet is used to remove the scale of the steel pipe, the rotating mechanism (5) is started to rotate the steel pipe, so that the steel pipe is in contact with the horizontal high-pressure water jet, and the steel pipe is descaled in a circle; S4, after the steel pipe is descaled in a circle, the linear driving mechanism (4) is started to drive the part of the steel pipe which is not treated by the high-pressure water jet to move above the limiting plate (21), and the descaling is continued.

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