Steel pipe centering device

Abstract

The steel pipe centering device comprises a rack, an upper sliding block and a lower sliding block, the upper sliding block and the lower sliding block are slidably connected to the rack in the vertical direction, the top of the upper sliding block is connected with two upper centering rollers, the bottom of the lower sliding block is connected with two lower centering rollers, and the upper sliding block and the lower sliding block are spaced to form a space for containing a steel pipe. The machine frame is further connected with two first oil cylinders, the first oil cylinders are detachably connected to the machine frame, one first oil cylinder is detachably connected with the upper sliding block, and the other first oil cylinder is detachably connected with the lower sliding block. When the first oil cylinder is overhauled or replaced, the upper sliding block and the lower sliding block are detached from the first oil cylinder, and the first oil cylinder is detached from the rack, so that an operator can conveniently overhaul or replace the first oil cylinder.

Description

Technical Field

[0001] The present application relates to the field of seamless steel pipe production equipment, and in particular to a centering device for a steel pipe. Background Art

[0002] At present, my country has become the country with the largest number of ultra-supercritical units in the world. A 1000MW unit (including ultra-supercritical steam boilers and four major pipelines of the power station) requires more than 1,300 tons of large-diameter thick-walled P92 seamless steel pipes, with an annual demand of about 20,000 tons. When rolling seamless steel pipes, a centering device is usually used to roll the seamless steel pipes.

[0003] A Chinese patent with the authorization announcement number CN101254510B discloses a centering device for rolling steel pipes, comprising a frame (1), a centering roller and a driving device, wherein the driving device is composed of a hydraulic cylinder (2) with adjustable stroke, a swing arm (5) and a driving gear; driving gears are respectively arranged on the rotating shafts arranged on the frame; a centering roller is also arranged on the rotating shaft; the movement of the piston rod of the hydraulic cylinder (2) with adjustable stroke drives the swing arm (5) to swing and the driving gear to rotate, thereby realizing the positioning, guiding or clamping of a circular workpiece with the center line of the frame as the axis by the centering roller A (7), the centering roller C (15) and the centering roller D (17) in a certain angle direction. The present invention cooperates with a matching translation mechanism to realize the operation of simultaneously moving a specific workpiece into and out of the center line of the workpiece, thereby improving production efficiency.

[0004] With regard to the above-mentioned related technologies, the hydraulic cylinder may be damaged after long-term use, and the hydraulic cylinder is usually fixedly connected to the frame, which makes it inconvenient for operators to inspect or replace the hydraulic cylinder. Summary of the invention

[0005] In order to facilitate the inspection and replacement of the first hydraulic cylinder, the present application provides a centering device for a steel pipe.

[0006] The centering device of a steel pipe provided in the present application adopts the following technical solution: The lower slider is connected to the upper slider and the lower slider is connected to the lower slider. The lower slider is connected to the upper slider and the lower slider is connected to the lower slider. The two rollers are connected to the top of the upper slider and the lower slider. The two rollers are connected to the bottom of the lower slider and the lower slider is connected to the bottom of the lower slider. The two rollers are connected to the bottom of the lower slider and the lower slider. The length direction of the upper roller is consistent with the width direction of the upper slider, and the length direction of the upper roller is consistent with the length direction of the lower roller. The upper slider and the lower slider are spaced to form a space for placing the steel pipe. The frame is also connected to a first oil cylinder, and the first oil cylinder is provided with two, and the first oil cylinder is detachably connected to the frame, one of the first oil cylinders is detachably connected to the upper slider, and the other of the first oil cylinders is detachably connected to the lower slider.

[0007] By adopting the above technical solution, when the first oil cylinder is inspected or replaced, the upper slider and the lower slider are removed from the first oil cylinder, and the first oil cylinder is removed from the frame, so as to facilitate the operator to inspect or replace the first oil cylinder.

[0008] Optionally, the first cylinder body is provided with a mounting seat, which is detachably connected to the frame by bolts, and the piston rod of the first cylinder is threadedly provided with a connecting seat, one of the connecting seats is detachably connected to the upper slider by bolts, and the other connecting seat is detachably connected to the lower slider by bolts.

[0009] By adopting the above technical solution, the mounting seat is detachably connected to the frame by bolts, and the connecting seat is detachably connected to the upper slider and the lower slider by bolts, thereby facilitating the disassembly of the first oil cylinder, thereby making the replacement and maintenance of the first oil cylinder more convenient.

[0010] Optionally, the upper sliding block has two first connecting grooves at both ends along the length direction of the upper centering roller, the first connecting grooves are opened at the bottom, and the upper centering roller is respectively embedded in the two first connecting grooves at both ends along its length direction, and the first mounting cover is detachably connected to the opening of the first connecting groove, and the first mounting cover is used to open or close the opening of the first connecting groove, and the lower sliding block has two second connecting grooves at both ends along the length direction of the lower centering roller, the second connecting grooves are opened at the top, and the lower centering roller is respectively embedded in the two second connecting grooves at both ends along its length direction, and the second mounting cover is detachably connected to the opening of the second connecting groove, and the second mounting cover is used to open or close the opening of the second connecting groove.

[0011] By adopting the above technical solution, the upper centering roller can be detachably connected to the upper slider, and the lower centering roller can be detachably connected to the lower slider, so as to facilitate the replacement and maintenance of the upper centering roller and the lower centering roller. The first mounting cover is removed from the upper slider to open the opening of the first connecting groove, so as to facilitate the removal of the upper centering roller. When removing the lower centering roller, the second mounting cover is removed from the lower slider to open the opening of the second connecting groove, so as to facilitate the removal of the lower centering roller.

[0012] Optionally, a lower auxiliary roller is provided on the side of the lower centering roller away from the other lower centering roller, the lower auxiliary roller is connected to the lower centering roller through a support rod, the length direction of the lower auxiliary roller is consistent with the length direction of the lower centering roller, one end of the support rod is connected to the lower centering roller, and the other end of the support rod is connected to the lower auxiliary roller, the support rod is rotatably connected to the lower centering roller, the rotation axis of the support rod is colinear with the center axis of the lower centering roller, and the support rods are all connected with a rotating assembly, and the rotating assembly is used to drive the support rod to rotate.

[0013] By adopting the above technical solution and adding a lower auxiliary roller, it is possible to avoid the situation where the steel pipe falls from the lower centering roller due to the placement position deviation when placed on the lower centering roller, so that the steel pipe can be stably placed on the lower centering roller.

[0014] Optionally, the rotating assembly includes a rotating rod and a moving part, the moving part is connected to the lower slider, one end of the rotating rod is hinged to the support rod, and the other end of the rotating rod is hinged to a moving block, the moving block is connected to the lower slider for sliding along the length direction of the lower slider, and the moving part is used to drive the moving block to move along the length direction of the lower slider.

[0015] By adopting the above technical solution, when the steel pipe is placed on the lower centering roller, the moving part moves the moving block along the length direction of the lower slider, thereby driving the rotating rod to move, the rotating rod drives the support rod to rotate, and the lower auxiliary roller follows the support rod to move, so that the lower auxiliary roller contacts the steel pipe, thereby allowing the steel pipe to be stably placed on the lower auxiliary roller.

[0016] Optionally, an upper auxiliary roller is provided on the side of the upper centering roller away from the other upper centering roller, the length direction of the upper auxiliary roller is consistent with the length direction of the upper centering roller, the upper auxiliary roller is connected to the upper centering roller through a connecting rod, one end of the connecting rod is rotatably connected to the upper centering roller, the rotation axis of the connecting rod is colinear with the central axis of the upper centering roller, the end of the connecting rod away from the upper centering roller is connected to the upper auxiliary roller, the upper slider is connected to a driving assembly, and the driving assembly is used to drive the connecting rod to rotate and drive the upper auxiliary roller to contact the steel pipe.

[0017] By adopting the above technical solution, an upper auxiliary roller is added. When the steel pipe approaches the upper centering roller and contacts the upper centering roller, the driving assembly drives the connecting rod to rotate, so that the upper auxiliary roller contacts the steel pipe, thereby further stably placing the steel pipe on the lower centering roller.

[0018] Optionally, a connecting rod sliding sleeve is provided with a sliding sleeve, a central axis of the sliding sleeve is colinear with a central axis of the connecting rod, the sliding sleeve is slidably connected to the connecting rod along the length direction of the connecting rod, two driving components are provided, and the driving components correspond to the connecting rod one by one, and the driving component includes a first spring and a telescopic rod, the length direction of the first spring is consistent with the vertical direction, the top end of the first spring is connected to the upper slider, and the bottom end of the first spring is connected to the sliding sleeve, the length direction of the telescopic rod is consistent with the vertical direction, the telescopic rod is telescopically arranged along its length direction, the top end of the telescopic rod is connected to the upper slider, and the bottom end of the telescopic rod is hinged to the sliding sleeve, and when the upper auxiliary roller approaches the upper slider, the first spring is squeezed and deformed.

[0019] By adopting the above technical solution, when the steel pipe is placed on the lower centering roller, the upper auxiliary roller approaches the upper slider, and the first spring is squeezed and deformed. When the steel pipe contacts the upper centering roller, the telescopic rod extends, and the first spring restores its shape and pushes the connecting rod to rotate, so that the upper auxiliary roller approaches the steel pipe and contacts the steel pipe, so that the steel pipe is stably connected to the upper centering roller and the lower centering roller.

[0020] The cam is connected to the sliding sleeve of the sliding sleeve, and the sliding sleeve is connected to the sliding sleeve of the sliding sleeve. The sliding sleeve has a central axis line of the sliding sleeve and a central axis line of the sliding sleeve. The bottom end of the sleeve is connected to the moving rod, and the top end of the sleeve is connected to the upper sliding block. The moving rod is provided with an installation groove on the circumference of the moving rod, and the length direction of the installation groove is consistent with the radial direction of the moving rod. A second spring and a locking block are connected in the installation groove, and the length direction of the second spring is consistent with the radial direction of the moving rod. One end of the second spring is connected to the inner wall of the installation groove, and the other end of the second spring is connected to the locking block. The locking block is slidably connected in the installation groove along the radial direction of the moving rod. A locking hole is provided on the circumference of the sleeve, and the locking block passes through the locking hole. When the locking block passes through the locking hole, the telescopic rod is contracted, and the sleeve is also connected to an unlocking component, which is used to drive the locking block away from the locking hole.

[0021] By adopting the above technical solution, when the upper auxiliary roller approaches the upper slider, the locking block passes through the locking hole and the retraction rod is in a retracted state. When the steel pipe contacts the upper centering roller, the unlocking assembly drives the locking block away from the locking hole. At the same time, the spring restores its shape and pushes the connecting rod to rotate. The connecting rod drives the retraction rod to extend, so that the upper auxiliary roller contacts the steel pipe, so that the steel pipe is stably connected to the upper centering roller and the lower centering roller.

[0022] Optionally, the sleeve is rotatably sleeved on the moving rod, and the locking block is provided with a guide surface along one circumferential side of the moving rod, and the guide surface facilitates the locking block to move away from the locking hole. The unlocking assembly includes a gear, a rack, and a pushing member. The gear is sleeved on the top of the sleeve, and the length direction of the rack is consistent with the length direction of the upper slider. The rack is meshed with the gear, and the pushing member is used to drive the rack to move along the length direction of the upper slider.

[0023] By adopting the above technical solution, the pusher drives the rack to move along the length direction of the upper slider, and the rack drives the gear to rotate, thereby driving the sleeve to rotate. Under the guidance of the guide surface, the locking block is embedded in the installation groove, thereby facilitating the movement of the sleeve along its length direction.

[0024] Optionally, the upper centering roller rotating sleeve is provided with a first circular ring, the central axis of the first circular ring is collinear with the central axis of the upper centering roller, the circumferential side of the first circular ring is connected to a first fixed rod, one end of the connecting rod is threadedly sleeved with a first connecting sleeve, the central axis of the first connecting sleeve is collinear with the central axis of the connecting rod, and the other end of the first connecting sleeve is threadedly sleeved on the first fixed rod.

[0025] By adopting the above technical solution, when repairing or replacing the upper auxiliary roller, the first connecting sleeve is rotated so that the first connecting sleeve is away from the first fixed rod, thereby making the connecting rod away from the first fixed rod, thereby facilitating the disassembly and assembly of the upper auxiliary roller and facilitating the operator to repair or replace the upper auxiliary roller.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. When inspecting or replacing the first oil cylinder, remove the upper slider and the lower slider from the first oil cylinder, and remove the first oil cylinder from the frame, so as to facilitate the operator to inspect or replace the first oil cylinder; 2. The upper centering roller is detachably connected to the upper slider, and the lower centering roller is detachably connected to the lower slider, so as to facilitate the replacement and maintenance of the upper centering roller and the lower centering roller. The first mounting cover is removed from the upper slider, so as to open the opening of the first connecting groove, so as to facilitate the removal of the upper centering roller. When removing the lower centering roller, the second mounting cover is removed from the lower slider, so as to open the opening of the second connecting groove, so as to facilitate the removal of the lower centering roller. 3. The mounting base is detachably connected to the frame by bolts, and the connecting base is detachably connected to the upper slider and the lower slider by bolts, so as to facilitate the disassembly of the first oil cylinder, thereby making the replacement and maintenance of the first oil cylinder more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional structural diagram of this embodiment.

[0028] Figure 2 It is a top view of this embodiment.

[0029] Figure 3 This embodiment Figure 2 Partial cross-sectional view along the AA axis.

[0030] Figure 4 This embodiment Figure 2 Partial cross-sectional view along the AA axis.

[0031] Figure 5 This embodiment Figure 2 Partial cross-sectional view along the BB axis.

[0032] Figure 6 This embodiment Figure 2 Partial cross-sectional view along the BB axis.

[0033] Figure 7 This embodiment Figure 3 Enlarged view of part E.

[0034] Figure 8 It is a front view of this embodiment.

[0035] Fig. 9 This embodiment Figure 7 Partial cross-sectional view along CC direction.

[0036] Fig.10 This embodiment Figure 7 Cross-sectional view along DD direction.

[0037] Fig.11 This embodiment Figure 3 Enlarged view of part F.

[0038] Fig.12 This embodiment Figure 4 Enlarged view of section G.

[0039] Description of reference numerals: 100, frame; 110, first oil cylinder; 111, swing shaft; 112, copper sleeve; 120, through hole; 130, mounting seat; 131, connecting hole; 140, connecting seat; 200, upper slider; 210, upper centering roller; 211, first groove; 212, first ring; 213, first fixing rod; 214, first connecting sleeve; 215, connecting rod; 216, first connecting ring; 217, sliding sleeve; 218, first block; 220, first slot; 230, first placement slot; 231, mounting plate; 232, sliding slot; 240, first connecting slot; 250, first mounting cover; 300, lower slider; 310, lower centering roller; 311, second groove; 313, second ring; 314, second fixing rod; 315, second connecting sleeve; 316, support rod; 317, second connecting ring; 320, second slot; 330, second placement slot; 331, support frame; 340, second connecting slot; 350, second mounting cover; 400, upper auxiliary roller; 410, first ring groove; 500, drive assembly; 510, first spring; 520, telescopic rod; 521, moving rod; 522, sleeve; 523, mounting slot; 524, second spring; 525, locking block; 526, locking hole; 600, unlocking assembly; 610, gear; 620, rack; 630, second oil cylinder; 700, pushing assembly; 710, pushing block; 720, third oil cylinder; 800, lower auxiliary roller; 810, second ring groove; 900, rotating assembly; 910, rotating rod; 920, fourth oil cylinder; 921, moving block. DETAILED DESCRIPTION

[0040] The following is combined with Figure 1-12 This application is described in further detail.

[0041] The present application embodiment discloses a centering device for a steel pipe. Figure 1 and Figure 2A centering device for a steel pipe includes a frame 100, an upper slider 200 and a lower slider 300 are slidably connected to the frame 100, the upper slider 200 and the lower slider 300 are spaced in sequence along the vertical direction, the upper slider 200 and the lower slider 300 are slidably connected to the frame 100 along the vertical direction, and the length direction of the upper slider 200 is consistent with the length direction of the lower slider 300. The frame 100 can also be detachably connected to two first oil cylinders 110, the two first oil cylinders 110 are spaced in sequence along the vertical direction, and the piston rods of the two first oil cylinders 110 are arranged oppositely, and the piston rods of the first oil cylinders 110 extend in the vertical direction. The two first oil cylinders 110 are respectively connected to the upper slider 200 and the lower slider 300. The piston rod of one first oil cylinder 110 is detachably connected to the top of the upper slider 200, and the piston rod of the other first oil cylinder 110 is detachably connected to the bottom of the lower slider 300. The upper slider 200 is slidably connected to the frame 100 along the vertical direction, and the lower slider 300 is slidably connected to the frame 100 along the vertical direction.

[0042] Reference Figure 1 and Figure 3 The upper slider 200 is rotatably connected to two upper centering rollers 210, the length direction of the upper centering rollers 210 is consistent with the width direction of the upper slider 200, and the two upper centering rollers 210 are sequentially spaced along the length direction of the upper slider 200. The lower slider 300 is connected to two lower centering rollers 310, the length direction of the lower centering rollers 310 is consistent with the width direction of the lower slider 300, and the two lower centering rollers 310 are sequentially spaced along the length direction of the lower slider 300. A space for the steel pipe to pass through is provided between the upper centering rollers 210 and the lower centering rollers 310, and the frame 100 is provided with a through hole 120 for the steel pipe to pass through, and the through hole 120 is circularly arranged.

[0043] Reference Figure 3 The first oil cylinder 110 has a swing shaft 111 connected to both sides of the cylinder body, and the first oil cylinder 110 is sleeved with a mounting seat 130, the central axis of the mounting seat 130 is collinear with the central axis of the first oil cylinder 110, and the length direction of the swing shaft 111 is consistent with the radial direction of the mounting seat 130. Both sides of the mounting seat 130 are provided with connecting holes 131, the length direction of the connecting holes 131 is consistent with the radial direction of the mounting seat 130, the swing shaft 111 corresponds to the connecting holes 131 one by one, the swing shaft 111 passes through the connecting holes 131 along its length direction, and the swing shaft 111 is sleeved with a copper sleeve 112, and the central axis of the copper sleeve 112 is collinear with the central axis of the swing shaft 111.

[0044] Reference Figure 3 and Figure 4, the mounting seat 130 is detachably connected to the frame 100 by bolts, and the bolts pass through the mounting seat 130 in the vertical direction and are threadedly connected to the frame 100. The piston rod of the first oil cylinder 110 is threadedly sleeved with a connecting seat 140 at one end away from the cylinder body of the first oil cylinder 110. The top of the upper slider 200 is provided with a first slot 220, and the bottom of the lower slider 300 is provided with a second slot 320. One connecting seat 140 is embedded in the first slot 220, and the other connecting seat 140 is embedded in the second slot 320. One connecting seat 140 is detachably connected to the upper slider 200 by bolts, and the bolts pass through the connecting seat 140 in the vertical direction and are threadedly connected to the upper slider 200. The other connecting seat 140 is detachably connected to the lower slider 300 by bolts, and the bolts pass through the connecting seat 140 in the vertical direction and are threadedly connected to the lower slider 300.

[0045] Reference Figure 3 and Figure 4 The upper slider 200 has a first placement groove 230 at the bottom, the length direction of the first placement groove 230 is consistent with the length direction of the upper slider 200, and both ends of the first placement groove 230 are opened along the length direction. The lower slider 300 has a second placement groove 330 at the top, the length direction of the second placement groove 330 is consistent with the length direction of the lower slider 300, and both ends of the first placement groove 230 are opened along the length direction.

[0046] Reference Figure 3 and Figure 5 The upper slider 200 has two first connection grooves 240 at both ends along the width direction thereof. The two first connection grooves 240 are sequentially spaced apart along the length direction of the upper slider 200. The bottom of the first connection groove 240 is open, and an upper centering roller 210 is respectively embedded in the two first connection grooves 240 at both ends along the length direction thereof. A first mounting cover 250 is detachably connected to the opening of the first connection groove 240. The first mounting cover 250 covers the opening of the first connection groove 240, and the first mounting groove 523 is detachably connected to the upper slider 200 by bolts. The bolts pass through the first mounting cover 250 in the vertical direction and are threadedly connected to the upper slider 200. The first mounting cover 250 is used to open or close the opening of the first connection groove 240.

[0047] Reference Figure 4 and Figure 6The lower slider 300 has two second connection grooves 340 at both ends along the width direction thereof. The two second connection grooves 340 are spaced in sequence along the length direction of the lower slider 300. The second connection grooves 340 are open at the top. A lower centering roller 310 is respectively embedded in the two second connection grooves 340 at both ends along the length direction thereof. A second mounting cover 350 is detachably connected to the opening of the second connection groove 340. The second mounting cover 350 covers the opening of the second connection groove 340. The first mounting groove 523 is detachably connected to the lower slider 300 by bolts. The bolts pass through the second mounting cover 350 in the vertical direction and are threadedly connected to the lower slider 300. The second mounting cover 350 is used to open or close the opening of the second connection groove 340.

[0048] Reference Figure 3 and Figure 7 The upper centering roller 210 has a first groove 211 on its circumference. The first groove 211 is an annular groove, and the center axis of the first groove 211 is collinear with the center axis of the upper centering roller 210. The upper centering roller 210 is rotatably sleeved with a first ring 212, which is embedded in the first groove, and the center axis of the first ring 212 is collinear with the center axis of the upper centering roller 210.

[0049] Reference Figure 3 and Figure 7 A first fixing rod 213 is connected to the circumferential side of the first circular ring 212, and the length direction of the first fixing rod 213 is consistent with the radial direction of the first circular ring 212. A first connecting sleeve 214 is threadedly sleeved on one end of the first fixing rod 213, and the central axis of the first fixing rod 213 is collinear with the central axis of the connecting rod 215. A connecting rod 215 is threadedly sleeved on the other end of the first connecting sleeve 214, and the central axis of the first connecting sleeve 214 is collinear with the central axis of the connecting rod 215.

[0050] Reference Figure 3 and Figure 7 The end of the connecting rod 215 away from the first circular ring 212 is connected with a first connecting ring 216, the first connecting ring 216 is rotatably sleeved with an upper auxiliary roller 400, the length direction of the upper auxiliary roller 400 is consistent with the length direction of the upper centering roller 210, the central axis of the first connecting ring 216 is collinear with the central axis of the upper auxiliary roller 400, a first annular groove 410 is opened on the circumference of the upper auxiliary roller 400, the central axis of the first annular groove 410 is collinear with the central axis of the upper auxiliary roller 400, and the first connecting ring 216 is embedded in the first annular groove 410. The upper auxiliary roller 400 is arranged on the side of the upper centering roller 210 away from the other upper centering roller 210.

[0051] Reference Figure 3 and Figure 7The upper slider 200 is connected to a driving assembly 500, and two driving assemblies 500 are provided, and the driving assemblies 500 correspond to the upper auxiliary rollers 400 one by one. The connecting rods 215 are all slidably sleeved with sliding sleeves 217, and the central axis of the sliding sleeves 217 is colinear with the central axis of the connecting rods 215. The sliding sleeves 217 are slidably connected to the connecting rods 215 along the length direction of the connecting rods 215. And the first placement groove 230 is provided with mounting plates 231 at both ends along its length direction, and the length direction of the mounting plates 231 is consistent with the width direction of the upper slider 200, and the mounting plates 231 are respectively connected to the corresponding side inner walls of the first placement groove 230 at both ends along its length direction.

[0052] Reference Figure 3 and Figure 7 , one driving assembly 500 corresponds to one mounting plate 231, and the driving assembly 500 includes a first spring 510 and a telescopic rod 520. The top end of the first spring 510 is connected to the bottom of the mounting plate 231, and the bottom end of the first spring 510 is connected to the top of the sliding sleeve 217. The length direction of the telescopic rod 520 is consistent with the vertical direction. The telescopic rod 520 is telescopically arranged along its length direction. The top end of the telescopic rod 520 is connected to the inner wall of the first placement groove 230, and the bottom end of the telescopic rod 520 passes through the mounting plate 231 in the vertical direction and is connected to the top of the sliding sleeve 217. The bottom end of the telescopic rod 520 is hinged to the sliding sleeve 217. When the upper auxiliary roller 400 approaches the upper slider 200, the first spring 510 is squeezed and deformed.

[0053] Reference Figure 3 and Figure 8 The telescopic rod 520 includes a moving rod 521 and a sleeve 522. The length direction of the moving rod 521 is consistent with the vertical direction. The sleeve 522 is slidably sleeved on the top of the moving rod 521. The central axis of the sleeve 522 is colinear with the central axis of the moving rod 521. The bottom end of the sleeve 522 is connected to the moving rod 521, and the top end of the sleeve 522 is rotatably connected to the inner wall of the first placement groove 230.

[0054] Reference Figure 3 and Figure 7 The sleeve 522 is rotatably sleeved on the moving rod 521 , and the top end of the moving rod 521 is hinged to the sliding sleeve 217 .

[0055] Reference Figure 3 and Fig. 9, a mounting groove 523 is provided on the circumference of the moving rod 521, and the length direction of the mounting groove 523 is consistent with the radial direction of the moving rod 521. A second spring 524 and a locking block 525 are connected in the mounting groove 523, and the length direction of the second spring 524 is consistent with the length direction of the mounting groove 523. One end of the second spring 524 is connected to the inner wall of the mounting groove 523 along its length direction, and the other end of the second spring 524 is connected to the locking block 525, and the locking block 525 is slidably connected in the mounting groove 523 along the length direction of the mounting groove 523. A locking hole 526 is provided on the circumference of the sleeve 522 for the locking block 525 to pass through. When the locking block 525 passes through the locking hole 526, the telescopic rod 520 contracts. A guide surface is provided on one side of the circumference of the moving rod 521 for the locking block 525, and the guide surface is inclined, and the guide surface is provided at the end of the locking block 525 away from the second spring 524, and the guide surface facilitates the locking block 525 to be away from the locking hole 526.

[0056] Reference Figure 3 and Fig.10 The sleeve 522 is also connected to an unlocking assembly 600, which is used to rotate the sleeve 522 and drive the locking block 525 away from the locking hole 526. The unlocking assembly 600 includes a gear 610, a rack 620, and a pusher. The gear 610 is sleeved on the top of the sleeve 522. The central axis of the gear 610 is in line with the central axis of the sleeve 522. The length direction of the rack 620 is consistent with the length direction of the upper slider 200. The rack 620 is meshed with the gear 610. The pusher is provided by the second oil cylinder 630. The piston rod of the second oil cylinder 630 extends along the length direction of the upper slider 200. One end of the rack 620 along its length direction is connected to the piston rod of the second oil cylinder 630. The second oil cylinder 630 is used to drive the rack 620 to move along the direction of the upper slider 200.

[0057] Reference Figure 3 and Fig.11 The first ring 212 is connected with a push assembly 700, which is used to rotate the first ring 212 and drive the telescopic rod 520 to retract. The push assembly 700 includes a push block 710 and a third oil cylinder 720. The outer circumference of the first ring 212 is connected with the first block 218. The length direction of the push block 710 is consistent with the width direction of the upper slider 200. The push block 710 is provided with sliding grooves 232 on both sides along its length direction. The sliding grooves 232 are arranged on the inner walls of the first placement groove 230 on both sides along the width direction of the upper slider 200. The sliding grooves 232 are arranged in an arc-shaped groove, and the concave arc surface of the sliding groove 232 is arranged toward the upper centering roller 210. The two ends of the push block 710 along its length direction are respectively embedded in the two sliding grooves 232, and the push block 710 is arranged in an arc-shaped block, and the concave arc surface of the push block 710 is arranged toward the upper centering roller 210. The push block 710 is slidably connected in the sliding groove 232. The cylinder body of the third oil cylinder 720 is hinged to the top inner wall of the first placement groove 230 , and the piston rod of the third oil cylinder 720 is hinged to the pushing block 710 .

[0058] Reference Figure 4 and Fig.12 The lower centering roller 310 is provided with a second groove 311 on its circumference. The second groove 311 is an annular groove, and the central axis of the second groove 311 is in line with the central axis of the lower centering roller 310. The lower centering roller 310 is provided with a second ring 313 on its rotatable sleeve. The second ring 313 is embedded in the first groove 211, and the central axis of the second ring 313 is in line with the central axis of the lower centering roller 310. The outer circumference of the second ring 313 is connected with a second fixing rod 314. The length direction of the second fixing rod 314 is consistent with the radial direction of the second ring 313. The second fixing rod 314 is threadedly sleeved with a second connecting sleeve 315 at one end away from the second ring 313. The central axis of the second connecting sleeve 315 is in line with the central axis of the second fixing rod 314. The other end of the second connecting sleeve 315 is threadedly sleeved with a support rod 316. The central axis of the support rod 316 is in line with the central axis of the second connecting sleeve 315.

[0059] Reference Figure 4 and Fig.12 The support rod 316 is connected to the second connecting ring 317 at one end away from the second connecting sleeve 315. The second connecting ring 317 is rotatably sleeved with the lower auxiliary roller 800. The central axis of the lower auxiliary roller 800 is in line with the central axis of the second connecting ring 317. A second annular groove 810 is provided on the circumference of the lower auxiliary roller 800. The central axis of the second annular groove 810 is in line with the central axis of the lower auxiliary roller 800. The second connecting ring 317 is embedded in the second annular groove 810. The length direction of the lower auxiliary roller 800 is consistent with the length direction of the lower centering roller 310. The lower auxiliary roller 800 is arranged on the side of the lower centering roller 310 away from the other lower centering roller 310.

[0060] Reference Figure 1 and Figure 4 , the support rod 316 is connected to a rotating assembly 900, and the rotating assembly 900 is used to drive the support rod 316 to rotate. Two support frames 331 are connected in the second placement groove 330, and the length direction of the support frame 331 is consistent with the width direction of the lower slider 300. The two ends of the support frame 331 along its length direction are respectively in contact with the inner wall of the corresponding side of the second placement groove 330. The two support frames 331 are distributed in sequence along the length direction of the lower slider 300, and the support frames 331 correspond to the rotating assembly 900 one by one. The rotating assembly 900 includes a rotating rod 910 and a moving part. The moving part is a fourth oil cylinder 920. The fourth oil cylinder 920 is connected to the top of the support frame 331. The piston rod of the fourth oil cylinder 920 extends along the length direction of the lower slider 300, and the piston rod of the fourth oil cylinder 920 is connected to a moving block 921, and the moving block 921 is slidably connected to the top of the support frame 331 along the length direction of the lower slider 300. One end of the rotating rod 910 is hinged to the supporting rod 316 , and the other end of the rotating rod 910 is hinged to the top of the moving block 921 .

[0061] The implementation principle of a centering device for a steel pipe in an embodiment of the present application is as follows: when in use, the steel pipe is placed on the lower centering roller 310, and guided by the lower auxiliary roller 800, the steel pipe moves to between the two lower centering rollers 310, and the fourth oil cylinder 920 drives the moving block 921 to move along the length direction of the lower slider 300, the rotating rod 910 moves following the moving block 921, and the rotating rod 910 drives the lower auxiliary roller 800 to rotate, so that the lower auxiliary roller 800 contacts the steel pipe, and the first oil cylinder 110 drives the upper slider 200 to approach the lower slider 300, so that the upper centering roller 210 contacts the peripheral side of the steel pipe. When inspecting or replacing the first oil cylinder 110, the mounting base 130 is removed from the frame 100, and the connecting base 140 is removed from the upper slider 200 or the lower slider 300, and the connecting base 140 is rotated so that the connecting base 140 is away from the piston rod of the first oil cylinder 110, so as to facilitate the removal of the first oil cylinder 110 from the frame 100, thereby facilitating the operator to inspect and replace the first oil cylinder 110.

[0062] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A centering device for a steel pipe, characterized in that: The invention comprises a frame (100), an upper slider (200), and a lower slider (300), wherein the upper slider (200) and the lower slider (300) are sequentially spaced apart in a vertical direction, and the upper slider (200) and the lower slider (300) are both slidably connected to the frame (100) in a vertical direction, and the length direction of the upper slider (200) is consistent with the length direction of the lower slider (300), and the top of the upper slider (200) is connected to two upper centering rollers (210), and the two upper centering rollers (210) are sequentially spaced apart in a length direction of the upper slider (200), and the bottom of the lower slider (300) is connected to two lower centering rollers (310), and the two lower centering rollers (310) are sequentially spaced apart in a length direction of the lower slider The upper slider (200) and the lower slider (300) are arranged in a spaced relationship in the length direction. The length direction of the upper centering roller (210) is consistent with the width direction of the upper slider (200). The length direction of the upper centering roller (210) is consistent with the length direction of the lower centering roller (310). The upper slider (200) and the lower slider (300) are spaced to form a space for placing the steel pipe. The frame (100) is also connected to a first oil cylinder (110). Two first oil cylinders (110) are provided. The first oil cylinders (110) are detachably connected to the frame (100). One of the first oil cylinders (110) is detachably connected to the upper slider (200), and the other first oil cylinder (110) is detachably connected to the lower slider (300).

2. A steel pipe centering device according to claim 1, characterized in that: The cylinder body of the first oil cylinder (110) is provided with a mounting seat (130), and the mounting seat (130) is detachably connected to the frame (100) by bolts. The piston rods of the first oil cylinder (110) are all threadedly provided with connecting seats (140), one of the connecting seats (140) is detachably connected to the upper slider (200) by bolts, and the other connecting seat (140) is detachably connected to the lower slider (300) by bolts.

3. A steel pipe centering device according to claim 1, characterized in that: The upper slider (200) is provided with two first connection grooves (240) at both ends along the length direction of the upper centering roller (210); the first connection grooves (240) are open at the bottom; the upper centering roller (210) is respectively embedded in the two first connection grooves (240) at both ends along the length direction; a first installation cover (250) is detachably connected to the opening of the first connection groove (240); the first installation cover (250) is used to open or close the opening of the first connection groove (240); the lower slider (300) is provided with two second connection grooves (340) at both ends along the length direction of the lower centering roller (310); the second connection grooves (340) are open at the top; the lower centering roller (310) is respectively embedded in the two second connection grooves (340) at both ends along the length direction; a second installation cover (350) is detachably connected to the opening of the second connection groove (340); the second installation cover (350) is used to open or close the opening of the second connection groove (340).

4. A steel pipe centering device according to claim 1, characterized in that: A lower auxiliary roller (800) is provided on the side of the lower centering roller (310) away from the other lower centering roller (310); the lower auxiliary roller (800) is connected to the lower centering roller (310) via a support rod (316); the length direction of the lower auxiliary roller (800) is consistent with the length direction of the lower centering roller (310); one end of the support rod (316) is connected to the lower centering roller (310); the other end of the support rod (316) is connected to the lower auxiliary roller (800); the support rod (316) is rotatably connected to the lower centering roller (310); the rotation axis of the support rod (316) is colinear with the central axis of the lower centering roller (310); the support rod (316) is connected to a rotating assembly (900); the rotating assembly (900) is used to drive the support rod (316) to rotate.

5. A steel pipe centering device according to claim 4, characterized in that: The rotating assembly (900) comprises a rotating rod (910) and a moving member, wherein the moving member is connected to the lower slider (300), one end of the rotating rod (910) is hinged to the support rod (316), and the other end of the rotating rod (910) is hinged to a moving block (921), the moving block (921) is slidably connected to the lower slider (300) along the length direction of the lower slider (300), and the moving member is used to drive the moving block (921) to move along the length direction of the lower slider (300).

6. A steel pipe centering device according to claim 1, characterized in that: An upper auxiliary roller (400) is provided on the side of the upper centering roller (210) away from the other upper centering roller (210); the length direction of the upper auxiliary roller (400) is consistent with the length direction of the upper centering roller (210); the upper auxiliary roller (400) is connected to the upper centering roller (210) via a connecting rod (215); one end of the connecting rod (215) is rotatably connected to the upper centering roller (210); the rotation axis of the connecting rod (215) is colinear with the central axis of the upper centering roller (210); one end of the connecting rod (215) away from the upper centering roller (210) is connected to the upper auxiliary roller (400); the upper slider (200) is connected to a driving assembly (500); the driving assembly (500) is used to drive the connecting rod (215) to rotate and drive the upper auxiliary roller (400) to contact the steel pipe.

7. A steel pipe centering device according to claim 6, characterized in that: The connecting rod (215) sliding sleeve is provided with a sliding sleeve (217), the central axis of the sliding sleeve (217) is colinear with the central axis of the connecting rod (215), the sliding sleeve (217) is slidably connected to the connecting rod (215) along the length direction of the connecting rod (215), two driving assemblies (500) are provided, the driving assemblies (500) correspond to the connecting rod (215) one by one, the driving assemblies (500) include a first spring (510) and a telescopic rod (520), the length direction of the first spring (510) is consistent with the vertical direction The top end of the first spring (510) is connected to the upper slider (200), the bottom end of the first spring (510) is connected to the sliding sleeve (217), the length direction of the telescopic rod (520) is consistent with the vertical direction, the telescopic rod (520) is telescopically arranged along its length direction, the top end of the telescopic rod (520) is connected to the upper slider (200), and the bottom end of the telescopic rod (520) is hinged to the sliding sleeve (217), and when the upper auxiliary roller (400) approaches the upper slider (200), the first spring (510) is squeezed and deformed.

8. A steel pipe centering device according to claim 7, characterized in that: The telescopic rod (520) comprises a moving rod (521) and a sleeve (522). The length direction of the moving rod (521) is consistent with the vertical direction. The length direction of the sleeve (522) is consistent with the length direction of the moving rod (521). The bottom end of the moving rod (521) is hinged to the sliding sleeve (217). The sleeve (522) is slidably sleeved on the top end of the moving rod (521). The central axis of the sleeve (522) is colinear with the central axis of the moving rod (521). The bottom end of the sleeve (522) is connected to the moving rod (521). The top end of the sleeve (522) is connected to the upper slider (200). The moving rod (521) is provided with a mounting groove (523). The length direction of the mounting groove (523) is consistent with the radial direction of the moving rod (521). A second A spring (524) and a locking block (525), wherein the length direction of the second spring (524) is consistent with the radial direction of the moving rod (521), one end of the second spring (524) is connected to the inner wall of the mounting groove (523), and the other end of the second spring (524) is connected to the locking block (525), and the locking block (525) is connected to the mounting groove (523) by sliding along the radial direction of the moving rod (521), and a locking hole (526) is provided on the circumferential side of the sleeve (522), and the locking block (525) passes through the locking hole (526). When the locking block (525) passes through the locking hole (526), ​​the telescopic rod (520) contracts, and the sleeve (522) is also connected to an unlocking component (600), and the unlocking component (600) is used to drive the locking block (525) away from the locking hole (526).

9. A steel pipe centering device according to claim 8, characterized in that: The sleeve (522) is rotatably sleeved on the moving rod (521), and the locking block (525) is provided with a guide surface along one side of the circumference of the moving rod (521), and the guide surface facilitates the locking block (525) to move away from the locking hole (526). The unlocking component (600) includes a gear (610), a rack (620), and a pushing member. The gear (610) is sleeved on the top of the sleeve (522), and the length direction of the rack (620) is consistent with the length direction of the upper slider (200). The rack (620) is meshed with the gear (610), and the pushing member is used to drive the rack (620) to move along the length direction of the upper slider (200).

10. A steel pipe centering device according to claim 6, characterized in that: The upper centering roller (210) is rotatably sleeved with a first circular ring (212), the central axis of the first circular ring (212) being colinear with the central axis of the upper centering roller (210), the circumferential side of the first circular ring (212) being connected to a first fixing rod (213), one end of the connecting rod (215) being threadedly sleeved with a first connecting sleeve (214), the central axis of the first connecting sleeve (214) being colinear with the central axis of the connecting rod (215), and the other end of the first connecting sleeve (214) being threadedly sleeved on the first fixing rod (213).

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