Online grinding device for outer welding seam of spiral welding pipe

Abstract

The utility model relates to an on-line grinding device for an outer weld joint of a spiral welded pipe, and belongs to the technical field of grinding of weld joints of spiral welded pipes. The device comprises a base, an axial displacement sliding way is arranged on the base, a lifting mechanism is arranged above the axial displacement sliding way, a radial adjusting mechanism is arranged above the lifting mechanism, an air cylinder combination mechanism is arranged above the radial adjusting mechanism, and a cross-shaped sliding table, an angle adjusting mechanism and an ejector rod limiting mechanism are arranged above the air cylinder combination mechanism. A belt sander is mounted above the cross-shaped sliding table; the two sets of coping devices are arranged on the two sides of the spiral welded pipe, so that continuous on-line automatic coping of the steel pipe is achieved; the position of the belt sander can be adjusted in the axial direction, the radial direction, the height direction and the angle of the spiral welded pipe, all welding seams of outer welding seams of different spiral welded pipes are ground, and the residual height of the ground welding seams can be stably controlled; the dust collecting device is arranged, so that dust in the coping process is collected, and the workshop operation environment is prevented from being polluted.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of spiral welded pipe outer weld on-line grinding device, belong to spiral welded pipe weld grinding technical field. BACKGROUND

[0002] The production of spiral welded pipe is the continuous production of continuously bending forming along helix and welding to coil plate, and two welds inside and outside are usually generated when spiral welded pipe is produced;Steel pipe produced on-line continuously is cut off according to certain pipe length on production line, and then a single steel pipe is produced.

[0003] Spiral welded pipe needs to be automatically ground after welding for its outer weld, and the significance of grinding is as follows:

[0004] 1, the outer weld excess height is ground, which is beneficial to pipeline service. The higher the weld of spiral welded pipe is, the more concentrated the stress at weld is, so that the height of weld is too high to affect the service life and service safety of pipeline.

[0005] 2, the reduction of weld of spiral welded pipe can effectively reduce the thickness of subsequent 3PE outer anticorrosion layer of steel pipe, greatly reduce the use amount of outer anticorrosion material, save resources and enhance product competitiveness. The standard requirement of 3PE outer anticorrosion of spiral welded pipe is that the thickness of outer anticorrosion layer in weld area is not less than 80% of the required thickness of pipe body. When 3PE outer anticorrosion is carried out, 3PE anticorrosion layer is wound on steel pipe in equal thickness in softened state according to helix, and then a series of rollers and continuous cooling are carried out to form the final 3PE anticorrosion layer in hardened state on steel pipe. The anticorrosion layer in softened state is wound on pipe body and weld at the same time, so that the anticorrosion layer on pipe body and weld is simultaneously extruded and thinned by roller. Since the outer weld is higher than the pipe body, the thinning effect of the roller on the outer weld is more intense than that on the pipe body. The higher the height of outer weld is, the worse the appearance of weld is, and the greater the thinning degree of anticorrosion layer at outer weld compared with pipe body is. Therefore, effectively reducing the height of outer weld and improving the appearance of outer weld can effectively reduce the consumption of outer anticorrosion material of pipe body while meeting the thickness of anticorrosion layer at weld, so as to achieve the purpose of greatly saving the use amount of outer anticorrosion material. From the test results, at least more than 2 million yuan of outer anticorrosion material can be saved per million square of winding 3PE outer anticorrosion layer after weld grinding. The annual output of outer anticorrosion material of general anticorrosion company is at least tens of millions to hundreds of millions square, so the economic benefit is remarkable.

[0006] For the automatic grinding of outer weld of spiral welded pipe, there is no equipment for off-line automatic grinding of outer weld of spiral welded pipe at present, and the development of on-line automatic grinding equipment for outer weld of spiral welded pipe is still in the experimental stage. The significance of on-line automatic grinding of outer weld of spiral welded pipe is as follows:

[0007] 1. Offline spiral welded pipe outer weld full weld automatic grinding has great difficulty to realize:

[0008] First, the pipe diameter and the weld state of each steel pipe are randomly changed, so the grinding of each steel pipe needs to be debugged;

[0009] Second, to complete the transportation of the steel pipe into and out of the grinding equipment, a platform, a special roller or a special trolley needs to be set up;

[0010] Third, to realize the linear walking of the grinding equipment and the synchronous rotation of the steel pipe, the sand belt grinding position needs to be accurately matched with the spiral weld, or the sand belt grinding position is fixed, and the steel pipe completes walking and rotation at the same time, realizing the accurate matching of the spiral weld and the grinding position; both of these two ways need to accurately track and feed back the spiral weld, and then complete the real-time matching adjustment of the grinding equipment and the steel pipe, so as to realize the accurate matching of the grinding point and the spiral weld;

[0011] Fourth, the grinding equipment should be able to adapt to the change of pipe diameter, the slight change of pitch and its accumulation, the change of the relative position of the pipe body and the weld in the radial direction, and the accurate control of the grinding height to prevent damage to the base material during grinding, and the start-stop mode of the full weld of each steel pipe;

[0012] Due to the above reasons, the structure design of the offline spiral welded pipe outer weld automatic grinding equipment with large inertia is difficult to increase, the control is difficult to realize, the equipment is large and expensive, and so far there is no successful development and use of offline spiral welded pipe outer weld automatic grinding equipment.

[0013] 2. On-line spiral weld outer weld full weld grinding has several inherent advantages:

[0014] First, for each size of steel pipe, the grinding can be selected at a fixed position: according to the spiral welded pipe production process characteristics, when the pipe diameter, plate thickness and working width are determined, the pitch, spiral length and weld at any pitch position relative to the inner and outer weld point can be determined, and it is a fixed value, so the grinding position of the weld can be fixed;

[0015] Second, according to the forming process of spiral welded pipe production, it is possible to eliminate various influencing factors through reasonable design of equipment functions;

[0016] Third, since the equipment grinds before the steel pipe is cut off, once the adjustment is in place, continuous automatic grinding can be realized. Content of the utility model

[0017] The utility model discloses a spiral weld pipe outer weld on -line grinding device can realize continuous on -line automatic grinding to the whole weld of the outer weld of the spiral weld pipe of different diameter, plate thickness and working plate width, prolongs the service life of spiral weld pipe, guarantees the service safety of spiral weld pipe, reduces the use amount of the outer anticorrosive material of spiral weld pipe, saves the cost.

[0018] The utility model discloses a spiral weld pipe outer weld on -line grinding device, including base, be equipped with axial displacement slide on the base, axial displacement slide sets up along the axial direction of spiral weld pipe, be equipped with lifting mechanism above axial displacement slide, and lifting mechanism can move along axial displacement slide, be equipped with radial adjustment mechanism above lifting mechanism, and radial adjustment mechanism can realize the displacement of this system in the radial larger distance of spiral weld pipe to adapt to the change of pipe diameter, be equipped with cylinder combination mechanism above radial adjustment mechanism, be equipped with cross slide, angle adjustment mechanism and top rod limiting mechanism above cylinder combination mechanism, be installed with abrasive band machine above cross slide, and cross slide can fine adjustment the position of abrasive band machine along the radial and axial of spiral weld pipe, and top rod limiting mechanism can carry out independent telescopic adjustment to effectively control the weld height after grinding, and angle adjustment mechanism is used for the adjustment of the parallelism of the front end of abrasive band machine and the outer wall of steel pipe, thereby adjusting the uniformity of the remaining height of the weld after grinding.

[0019] Preferably, the radial adjustment mechanism comprises a radial adjustment bracket and a radial adjustment pressing plate, the radial adjustment pressing plates are symmetrically arranged on both sides of the radial adjustment bracket, the radial adjustment pressing plates are fixed on the top plate of the lifting mechanism, the radial adjustment pressing plates on both sides enclose a movable groove, and the bottom of the radial adjustment bracket is movable in the movable groove; the radial adjustment bracket is in transmission connection with a radial adjustment screw assembly; the bearing seat of the radial adjustment screw assembly is fixed on the top plate of the lifting mechanism; rotating the handle of the radial adjustment screw assembly can drive the radial adjustment bracket to move in the movable groove; and the radial adjustment pressing plate is further provided with a radial locking handle.

[0020] Preferably, the cylinder combination mechanism comprises a cylinder combination mechanism lower mounting plate, the cylinder combination mechanism lower mounting plate is in screw connection with the radial adjustment bracket, one end of the cylinder combination mechanism lower mounting plate is fixed with a cylinder fixed plate, the tail end of the cylinder is fixedly connected with the cylinder fixed plate, the head end of the cylinder is fixedly connected with a front end stand, the front end stand is fixedly connected with a cylinder combination mechanism upper mounting plate, the cylinder combination mechanism upper mounting plate is in sliding connection with the cylinder combination mechanism lower mounting plate through a guide rail sliding block assembly, and the cylinder can drive the cylinder combination mechanism upper mounting plate to move along the radial of the spiral weld pipe.

[0021] The lower installation plate of the cylinder combination mechanism is provided with a plurality of moving jacks on both sides, the moving jacks are connected with the lower installation plate of the cylinder combination mechanism through bolts, and the moving jacks are threadedly connected with lifting balls in the center; when adjustment is needed, the bolts between the lower installation plate of the cylinder combination mechanism and the radial adjustment support can be removed, the lower installation plate of the cylinder combination mechanism is lifted through the lifting balls, so that manual adjustment of the radial displacement in a large range is facilitated.

[0022] Preferably, the cross slide table comprises an angle adjusting plate, an axial dovetail base, an adapter base and a radial dovetail base; the angle adjusting plate is rotationally connected with the upper installation plate of the cylinder combination mechanism through a rotating shaft, and is positionally locked with the upper installation plate of the cylinder combination mechanism after being rotated into position; the axial dovetail base is fixedly connected above the angle adjusting plate, the adapter base is arranged above the axial dovetail base, and the axial dovetail base is slidably connected with the adapter base through dovetail grooves at the bottom of the adapter base; an axial fine adjustment lead screw mechanism is further installed on the axial dovetail base and is drivingly connected with the adapter base through the axial fine adjustment lead screw mechanism; the axial fine adjustment lead screw mechanism can be used to realize accurate axial position adjustment and alignment of the weld grinding, and at the same time, the part of the abrasive belt in the width direction that does not participate in grinding can enter the grinding position, so as to realize full utilization of the abrasive belt.

[0023] The adapter base is slidably connected with the radial dovetail base through dovetail grooves at the top of the adapter base, and the radial dovetail base is drivingly connected with the adapter base through a radial fine adjustment lead screw mechanism; the radial and axial positions of the abrasive belt grinding machine can be finely adjusted by adjusting the hand wheels of the radial fine adjustment lead screw mechanism and the axial fine adjustment lead screw mechanism.

[0024] Preferably, the angle adjusting mechanism comprises a fixed shaft, an internally threaded sleeve and a rotating block; the fixed shaft is fixedly connected with the upper installation plate of the cylinder combination mechanism, a joint bearing is sleeved on the fixed shaft, the joint bearing is threadedly connected with the internally threaded sleeve, the internally threaded sleeve is rotationally connected with the rotating block, the rotating block is rotationally connected with an angle adjusting connecting plate at the bottom, and the angle adjusting connecting plate is fixedly connected with the angle adjusting plate; an arc slot is arranged on the angle adjusting plate for adjustment; an angle adjusting hand wheel is installed at the end of the internally threaded sleeve, and the angle adjusting hand wheel is rotated to drive the internally threaded sleeve to rotate, the angle adjusting plate is pushed to rotate around the rotating shaft by the reaction force of the joint bearing, and after the angle is adjusted, the angle adjusting plate is quickly locked by a lock screw.

[0025] Preferably, the lifting rod limiting mechanism comprises a limiting mechanism mounting frame, a limiting rod is installed on the limiting mechanism mounting frame, and a limiting eye shaft bearing is fixed to the first end of the limiting rod; the position of the limiting rod on the limiting mechanism mounting frame can be adjusted.

[0026] Preferably, the lifting mechanism is provided with four jacking bull's eye bearings below the four corners, the jacking bull's eye bearings are adjusted to make the bottom surface of the lifting mechanism separate from the axial displacement slide way, so as to push the lifting mechanism to move, the abrasive belt of the abrasive belt machine is aligned with the weld to be ground, and it is applicable to spiral welded pipes with different pitches and avoids interference with existing equipment on the production line; after the position is adjusted, the lifting mechanism and the axial displacement slide way can be locked by bolts.

[0027] Preferably, the spiral welded pipe outer weld on-line grinding device further comprises a dust collecting device, the dust collecting device comprises a combined adjustable dust collecting cover and a dust collecting box, the combined adjustable dust collecting cover is hinged below the abrasive belt machine, the combined adjustable dust collecting cover can be telescopic according to the requirements of different pipe diameters, and splashes sprayed by the fan can be effectively collected in the dust collecting box; the dust collecting box is located below the combined adjustable dust collecting cover, and the bottom of the dust collecting box is provided with rollers convenient for moving; a combined adjustable dust collecting cover support roller is installed on one side of the lower mounting plate of the cylinder combination mechanism close to the spiral welded pipe, the position of the combined adjustable dust collecting cover support roller can be adjusted along the radial direction of the spiral welded pipe, and when the cylinder is retracted and extended, the combined adjustable dust collecting cover support roller rolls to support the combined adjustable dust collecting cover, so that the hinged angle is stably controlled, the collection angle of the combined adjustable dust collecting cover is adjusted, and the dust collection efficiency is ensured.

[0028] The utility model has the beneficial effects compared with prior art:

[0029] 1. The utility model discloses a grinding device for spiral welded pipe, which comprises a spiral welded pipe, a grinding device and a dust collecting device.

[0030] 2. The grinding device comprises a grinding device and a dust collecting device.

[0031] 3. The utility model discloses a grinding device for spiral welded pipe, which comprises a spiral welded pipe, a grinding device and a dust collecting device. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is the state schematic view when the utility model works.

[0033] Figure 2 It is the front view when the utility model works.

[0034] Figure 3 It is one of the structure schematic views of the utility model.

[0035] Figure 4is the second structure schematic view of the utility model;

[0036] Figure 5 is the structure schematic view of base and lifting mechanism;

[0037] Figure 6 is the sectional view of base and lifting mechanism main view;

[0038] Figure 7 is the structure schematic view of radial adjustment mechanism;

[0039] Figure 8 is the structure schematic view of air cylinder combination mechanism;

[0040] Figure 9 is the sectional view of air cylinder combination mechanism main view;

[0041] Figure 10 is the structure schematic view of top rod limiting mechanism;

[0042] Figure 11 is the structure schematic view of cross slide;

[0043] Figure 12 is the structure schematic view of angle adjustment mechanism;

[0044] Figure 13 is the structure schematic view of dust collecting device.

[0045] In the drawing: 1, spiral welded pipe outer weld on-line grinding device;11, base;111, axial displacement slide;12, lifting mechanism;121, jacking bull eye bearing;13, radial adjustment mechanism;131, radial adjustment screw assembly;132, radial adjustment pressing plate;133, radial locking handle;134, radial adjustment support;14, air cylinder combination mechanism;141, air cylinder combination mechanism upper mounting plate;142, air cylinder fixed plate;143, moving top block;144, jacking ball;145, combination adjustment dust collecting cover support roller;146, air cylinder combination mechanism lower mounting plate;147, front end stand;148, air cylinder;149, guide rail sliding block assembly;15, cross slide;151, axial dovetail base;152, adapter seat;153, radial fine adjustment screw mechanism;154, radial dovetail base;155, axial fine adjustment screw mechanism;156, angle adjusting plate;157, rotating shaft;158, lockable screw;16, sand belt machine;17, angle adjustment mechanism;171, joint bearing;172, fixed shaft;173, internal thread sleeve;174, rotating block;175, angle adjusting hand wheel;176, angle adjustment connecting plate;18, dust collecting device;181, dust collecting box;182, combination adjustment dust collecting cover;19, top rod limiting mechanism;191, limiting rod;192, limiting bull eye bearing;193, limiting mechanism mounting frame;2, spiral welded pipe. DETAILED DESCRIPTION

[0046] The utility model is further explained below in combination with specific embodiments.

[0047] As Figures 1-13 shown, the embodiment is realized by the following technical solutions: including base 11, the base 11 is equipped with axial displacement slide 111, axial displacement slide 111 is along the axial arrangement of spiral weld pipe 2, axial displacement slide 111 top is equipped with lifting mechanism 12, lifting mechanism 12 can move along axial displacement slide 111, lifting mechanism 12 top is equipped with radial adjustment mechanism 13, radial adjustment mechanism 13 can realize the displacement of the system in spiral weld pipe 2 radial larger distance, to adapt to the change of pipe diameter;Radial adjustment mechanism 13 top is equipped with cylinder combination mechanism 14, cylinder combination mechanism 14 top is equipped with cross slide 15, angle adjustment mechanism 17 and top rod limiting mechanism 19;Cross slide 15 top is installed with abrasive belt machine 16, cross slide 15 can along the radial and axial fine adjustment abrasive belt machine 16's position of spiral weld pipe 2, top rod limiting mechanism 19 can carry out independent telescopic adjustment, to effectively control the height of weld after dressing and grinding;Angle adjustment mechanism 17 is used for the adjustment of the parallelism of the front end of abrasive belt of abrasive belt machine 16 and the outer wall of steel pipe, to adjust the uniformity of the remaining height of weld after dressing and grinding.

[0048] In the embodiment, the radial adjustment mechanism 13 includes a radial adjustment bracket 134 and a radial adjustment pressing plate 132, the radial adjustment pressing plate 132 is symmetrically arranged on both sides of the radial adjustment bracket 134, the radial adjustment pressing plate 132 is fixed on the top plate of the lifting mechanism 12, the radial adjustment pressing plate 132 on both sides surrounds to form a movable groove, and the bottom of the radial adjustment bracket 134 moves in the movable groove; the radial adjustment bracket 134 is in transmission connection with the radial adjustment screw assembly 131; the bearing seat of the radial adjustment screw assembly 131 is fixed on the top plate of the lifting mechanism 12; rotating the handle of the radial adjustment screw assembly 131 can drive the radial adjustment bracket 134 to move in the movable groove; the radial adjustment pressing plate 132 is further provided with a radial locking handle 133.

[0049] The cylinder combination mechanism 14 includes a cylinder combination mechanism lower mounting plate 146, the cylinder combination mechanism lower mounting plate 146 is in threaded connection with the radial adjustment bracket 134, one end of the cylinder combination mechanism lower mounting plate 146 is fixed with a cylinder fixed plate 142, the tail end of a cylinder 148 is fixedly connected with the cylinder fixed plate 142, the head end of the cylinder 148 is connected with a front end stand 147, and the front end stand 147 is fixedly connected with a cylinder combination mechanism upper mounting plate 141; the cylinder combination mechanism upper mounting plate 141 is in sliding connection with the cylinder combination mechanism lower mounting plate 146 through a guide rail sliding block assembly 149, and the cylinder 148 can drive the cylinder combination mechanism upper mounting plate 141 to move radially along the spiral weld pipe 2.

[0050] The both sides of the lower installation plate 146 of the cylinder combination mechanism are provided with a plurality of moving top blocks 143, the moving top blocks 143 are connected with the lower installation plate 146 of the cylinder combination mechanism through bolts, and the moving top blocks 143 are threadedly connected with the jacking balls 144 in the center; when adjustment is needed, the bolts between the lower installation plate 146 of the cylinder combination mechanism and the radial adjustment support 134 can be removed, the lower installation plate 146 of the cylinder combination mechanism is jacked up through the jacking balls 144, so that manual adjustment of the radial displacement in a large range is facilitated.

[0051] The cross slide 15 comprises an angle adjustment plate 156, an axial dovetail base 151, an adapter base 152 and a radial dovetail base 154; the angle adjustment plate 156 is rotationally connected with the upper installation plate 141 of the cylinder combination mechanism through a rotating shaft 157, and is position-locked with the upper installation plate 141 of the cylinder combination mechanism after being rotated into position; the axial dovetail base 151 is fixedly connected above the angle adjustment plate 156, the adapter base 152 is arranged above the axial dovetail base 151, and the axial dovetail base 151 is slidably connected with the adapter base 152 through the dovetail grooves in the bottom of the adapter base 152; the axial fine adjustment lead screw mechanism 155 is further installed on the axial dovetail base 151 and is drivingly connected with the adapter base 152 through the axial fine adjustment lead screw mechanism 155; the axial fine adjustment lead screw mechanism 155 can be used to realize accurate axial position adjustment and alignment of the weld grinding, and at the same time, the part of the abrasive belt in the width direction which does not participate in grinding can enter the grinding position, so that the abrasive belt is fully utilized; the radial dovetail base 154 is slidably connected with the top of the adapter base 152 through the dovetail grooves, and is drivingly connected with the adapter base 152 through the radial fine adjustment lead screw mechanism 153; the radial and axial positions of the abrasive belt grinding machine 16 can be finely adjusted by adjusting the hand wheels of the radial fine adjustment lead screw mechanism 153 and the axial fine adjustment lead screw mechanism 155.

[0052] The angle adjustment mechanism 17 comprises a fixed shaft 172, an internally-threaded sleeve 173 and a rotating block 174; the fixed shaft 172 is fixedly connected with the upper installation plate 141 of the cylinder combination mechanism, the knuckle bearing 171 is sleeved on the fixed shaft 172, the knuckle bearing 171 is threadedly connected with the internally-threaded sleeve 173, the internally-threaded sleeve 173 is rotationally connected with the rotating block 174, the rotating block 174 is rotationally connected with the angle adjustment connecting plate 176 at the bottom, and the angle adjustment connecting plate 176 is fixedly connected with the angle adjustment plate 156; the angle adjustment plate 156 is provided with an arc-shaped notch for adjustment; the angle adjustment hand wheel 175 is installed at the end of the internally-threaded sleeve 173, the angle adjustment hand wheel 175 is rotated, the internally-threaded sleeve 173 is driven to rotate, the angle adjustment plate 156 is pushed to rotate around the rotating shaft 157 by the reaction force of the knuckle bearing 171, and after the angle is adjusted, the angle adjustment plate 156 is quickly locked by the lock screw 158.

[0053] The top rod limiting mechanism 19 comprises a limiting mechanism mounting frame 193, a limiting rod 191 is mounted on the limiting mechanism mounting frame 193, and the first end of the limiting rod 191 is fixed with a limiting bull eye bearing 192; the position of the limiting rod 191 on the limiting mechanism mounting frame 193 can be adjusted.

[0054] The lifting mechanism 12 is provided with four top lifting bull eye bearings 121 below the four corners, the position of the lifting mechanism 12 on the axial displacement sliding way 111 can be adjusted by adjusting the top lifting bull eye bearings 121, so that the bottom surface of the lifting mechanism 12 is separated from the axial displacement sliding way 111, the position of the lifting mechanism 12 on the axial displacement sliding way 111 is adjusted, the abrasive belt of the abrasive belt machine 16 is aligned with the weld seam to be ground, the abrasive belt machine 16 can be applied to spiral welded pipes with different pitches and avoid interference with existing equipment on the production line, and after the position is adjusted, the lifting mechanism 12 and the axial displacement sliding way 111 can be locked by bolts.

[0055] The spiral welded pipe outer weld on-line grinding device 1 further comprises a dust collecting device 18, the dust collecting device 18 comprises a combined adjustment dust collecting cover 182 and a dust collecting box 181, the combined adjustment dust collecting cover 182 is hinged below the abrasive belt machine 16, the combined adjustment dust collecting cover 182 can be telescopic according to the requirements of different pipe diameters, and the spatter sprayed by the fan can be effectively collected in the dust collecting box 181; the dust collecting box 181 is located below the combined adjustment dust collecting cover 182, the bottom of the dust collecting box 181 is provided with a roller convenient for moving; a combined adjustment dust collecting cover supporting roller 145 is installed on one side of the gas cylinder combined mechanism lower mounting plate 146 close to the spiral welded pipe 2, the position of the combined adjustment dust collecting cover supporting roller 145 can be adjusted along the spiral welded pipe diameter, when the gas cylinder 148 is retracted and extended, the combined adjustment dust collecting cover supporting roller 145 rolls to support the combined adjustment dust collecting cover 182, the hinged angle is stably controlled, the collection angle of the combined adjustment dust collecting cover 182 is adjusted, and the dust collection efficiency is ensured.

[0056] The utility model discloses a method for automatically grinding the full weld of the outer weld of the spiral welded pipe, comprising two sets of structure same spiral welded pipe outer weld on-line grinding device 1, two sets of device distribution in the both sides of spiral welded pipe 2, two sets of device are each other main and auxiliary, one set of device is equipped as main equipment, another set of device is equipped as auxiliary equipment, and the main role of auxiliary equipment is to complete the grinding of the outer weld that is not ground during the replacement of the abrasive belt of main equipment, and the method comprises the following steps:

[0057] I, the position debugging of abrasive belt machine 16, specifically comprising the following steps:

[0058] 1, according to the different pitch and the interference of existing equipment on the production line, the position of the lifting mechanism 12 on the axial displacement sliding way 111 is adjusted, so that the abrasive belt of the abrasive belt machine 16 is aligned with the weld seam to be ground, and the two sets of spiral welded pipe outer weld on-line grinding device 1 are adjusted at the axial interval of 0.5 times the pitch of the spiral welded pipe 2.

[0059] 2. Adjust the lifting mechanism 12 to make the axis of the abrasive belt grinding wheel and the axis of the spiral welded pipe 2 level;

[0060] 3. Adjust the position of the abrasive belt grinding machine 16 along the radial direction of the spiral welded pipe: in the retracted state of the air cylinder 148, adjust the position of the limiting bull-eye bearing 192 so that the front end of the limiting bull-eye bearing 192 is separated from the outer wall of the spiral welded pipe 3 at the 3 o'clock or 9 o'clock position by a certain distance, which is smaller than the stroke of the air cylinder 148; then adjust the radial fine adjustment screw mechanism 153 of the cross slide 15 alone to move the abrasive belt grinding machine 16 towards the spiral welded pipe 2 until the front end of the abrasive belt approaches the front end of the limiting bull-eye bearing 192; then start the abrasive belt grinding machine 16 and simultaneously extend the air cylinder 148 to drive the abrasive belt grinding machine 16 and the limiting bull-eye bearing 192 to move forward as a whole, and the air cylinder 148 makes the front end of the limiting bull-eye bearing 192 press on the outer wall of the spiral welded pipe 2 with stable pressure; continue to adjust the radial horizontal displacement of the cross slide 15 alone to gradually approach the weld of the steel pipe with the abrasive belt until the desired remaining height of the weld is reached.

[0061] 4. Adjust the angle adjustment mechanism 17 to adjust the parallelism between the front end of the abrasive belt and the outer wall of the steel pipe, thereby adjusting the uniformity of the remaining height of the welded seam after grinding, and then lock the angle after adjustment;

[0062] II. Perform spiral welded pipe weld grinding; the spiral production main machine is started, the coil is curled and delivered along the spiral line, and the inner and outer welds are simultaneously started for fixed-point welding to form a spiral weld; the spiral production main machine has the function of real-time detection of the welding length during production; the control program of the two sets of spiral welded pipe outer weld on-line grinding devices 1 has two control modes: automatic control mode or manual control mode, and the control program has the function of reading the welding length;

[0063] The automatic control program does not need to consider which of the main device and the auxiliary device is closer to the outer weld position of the spiral welded pipe, and the design of the device structure can ensure that repeated grinding of the second device will not have a significant impact on the height of the welded seam that has been ground, and the automatic control mode specifically includes the following steps:

[0064] A1. Switch the control program to automatic control mode, at which time the two sets of spiral welded pipe outer weld on-line grinding devices 1 are started and stopped in conjunction with the spiral production main machine through the control program;

[0065] A2. Start the spiral production main machine, and start the abrasive belt grinding machine of the main device, at which time the air cylinder is pushed forward, the air cylinder drives the abrasive belt grinding machine to move forward until the bull-eye bearing is on the outer wall of the spiral welded pipe, and the abrasive belt starts to grind the weld; after a few seconds, the coil is delivered along the spiral line, and the inner and outer welds start to weld, at the same time, the control program starts to record the welding length of the main machine weld;

[0066] A3, when the welding length read by the control program reaches the set limit length of the grinding weld by the abrasive belt, the auxiliary device is automatically started to begin grinding; when the length of the weld ground by the auxiliary device exceeds 0.75 times the length of the spiral weld, the main device stops grinding the weld, at which time the abrasive belt grinder is stopped and the linkage cylinder is retracted, the abrasive belt grinder is driven to retreat, and the control program stops accumulating the welding length, so that the abrasive belt of the main device can be replaced;

[0067] A4, after the abrasive belt of the main device is manually replaced, the main device is restarted to grind, and the control program is restarted to accumulate the length of the grinding by the abrasive belt; when the length of the weld ground by the main device exceeds 0.75 times the length of the spiral weld, the auxiliary device is automatically stopped to grind the weld;

[0068] A5, when the spiral production host needs to be temporarily stopped during production, the spiral production host starts a stop bell, and after a few seconds, the spiral production host stops the inner and outer welding, at which time the main device stops grinding the weld, and the control program automatically saves the accumulated grinding length;

[0069] A6, when the spiral production host is started again, the main device is restarted to grind; the control program continues to accumulate the length of the weld ground, until the length of the weld ground by the main device reaches the set limit length of the grinding weld by the abrasive belt; the above steps are repeated; the abrasive belt of the auxiliary device can be replaced at any time when the auxiliary device is not working;

[0070] The manual control mode specifically includes the following steps:

[0071] B1, the control program is switched to the manual control mode, at which time the start and stop of the two sets of spiral pipe outer weld on-line grinding devices 1 are not affected by the start and stop of the spiral production host;

[0072] B2, when the abrasive belt of the main device needs to be replaced, if the auxiliary device is closer to the outer welding position than the main device, the auxiliary device is first manually started to automatically grind, after the ground weld passes through the main device, the main device can be stopped at any time and the abrasive belt can be replaced, after the abrasive belt of the main device is replaced, the automatic grinding of the auxiliary device can be stopped;

[0073] B3, if the main device is closer to the outer welding position than the auxiliary device, after the auxiliary device is started to automatically grind, the main device can be stopped at any time to replace the abrasive belt, after the abrasive belt of the main device is replaced, the automatic grinding of the auxiliary device can be stopped;

[0074] B4, the abrasive belt of the auxiliary device can be replaced at any time as long as it does not participate in the work; through the above alternating work, the automatic grinding of the entire weld of the on-line outer weld can be realized;

[0075] III. The control program is provided with an automatic grinding mode for the outer weld of the on-line pipe end, when the mode is adopted, the on-line grinding device for the outer weld of the spiral welded pipe is not connected with the start and stop of the spiral production host, but is controlled through two inductive switches, only one set of on-line grinding device for the outer weld of the spiral welded pipe can be adopted to realize the length of 12 meters, the pipe end grinding length is 300mm, for example, along the direction of the spiral welded pipe, after the grinding position of the sand belt machine, the distance is equal to 12 meters, the inductive switch is arranged at the position which is spaced apart by 300mm forward and backward, specifically comprising the following steps:

[0076] 1. Switch to the automatic grinding mode for the outer weld of the on-line pipe end;

[0077] 2. When the first inductive switch detects the front end of the spiral welded pipe, the on-line grinding device for the outer weld of the spiral welded pipe is started to grind the outer weld, when the second inductive switch detects the spiral welded pipe, the grinding of the weld is automatically stopped; after the steel pipe is cut off according to the length of 12 meters, the outer weld of the rear end of the front pipe and the outer weld of the front end of the rear pipe is ground.

[0078] The utility model can manually start and stop the equipment at any time according to the need to grind the outer weld of the pipe end of the non-length steel pipe.

Claims

1. An apparatus for on-line dressing of the outer weld of a spiral welded pipe, characterized in that The base (11) is provided with an axial displacement slide (111) arranged along the axis of the spiral welded pipe (2), a lifting mechanism (12) movably arranged above the axial displacement slide (111), a radial adjustment mechanism (13) arranged above the lifting mechanism (12), a cylinder combination mechanism (14) arranged above the radial adjustment mechanism (13), a cross slide (15), an angle adjustment mechanism (17) and a top rod limiting mechanism (19) arranged above the cylinder combination mechanism (14), and a belt sander (16) arranged above the cross slide (15). The dust collecting device (18) comprises a combined adjustment dust collecting cover (182) and a dust collecting box (181).

2. The on-line outer weld grinding device for spiral welded pipe as claimed in claim 1, wherein, The radial adjustment mechanism (13) comprises a radial adjustment support (134) and radial adjustment pressing plates (132) symmetrically arranged on both sides of the radial adjustment support (134), the radial adjustment pressing plates (132) being fixed to the top plate of the lifting mechanism (12), the radial adjustment pressing plates (132) on both sides surrounding a movable groove, the bottom of the radial adjustment support (134) being movable in the movable groove, the radial adjustment support (134) being in transmission connection with a radial adjustment lead screw assembly (131), the bearing seat of the radial adjustment lead screw assembly (131) being fixed to the top plate of the lifting mechanism (12), and the radial adjustment pressing plates (132) being further provided with radial locking handles (133).

3. The apparatus for on-line dressing of the outer weld of a spiral welded pipe according to claim 2, characterized in that, The cylinder combination mechanism (14) comprises a cylinder combination mechanism lower mounting plate (146) in threaded connection with the radial adjustment support (134), a cylinder fixing plate (142) fixed to one end of the cylinder combination mechanism lower mounting plate (146), a cylinder (148) in fixed connection between the tail end and the cylinder fixing plate (142), a front end stand (147) connected to the head end of the cylinder (148), the front end stand (147) being in fixed connection with a cylinder combination mechanism upper mounting plate (141), the cylinder combination mechanism upper mounting plate (141) being in sliding connection with the cylinder combination mechanism lower mounting plate (146) through a guide rail sliding block assembly (149), and the cylinder combination mechanism lower mounting plate (146) being provided with a combined adjustment dust collecting cover supporting roller (145) on the side close to the spiral welded pipe.

4. The apparatus for on-line dressing of the outer weld of a spiral welded pipe according to claim 3, characterized in that, The cylinder combination mechanism lower mounting plate (146) is provided with a plurality of movable top blocks (143) on both sides, the movable top blocks (143) being connected with the cylinder combination mechanism lower mounting plate (146) through bolts, and the movable top blocks (143) being in threaded connection with lifting ball bearings (144) at the centers.

5. The apparatus for on-line dressing of the outer weld of the spiral welded pipe according to claim 3, characterized in that, The cross slide (15) comprises an angle adjusting plate (156), an axial dovetail base (151), an adapter base (152) and a radial dovetail base (154); the angle adjusting plate (156) is rotationally connected with the upper mounting plate (141) of the air cylinder combination mechanism through a rotating shaft (157) and is positionally locked with the upper mounting plate (141) of the air cylinder combination mechanism after being rotated into position.

6. The spiral welded pipe outer weld on-line dressing device according to claim 5, characterized in that, The axial dovetail base (151) is mounted with an axial fine adjustment screw mechanism (155) and is drivingly connected with the adapter base (152) through the axial fine adjustment screw mechanism (155); the top of the adapter base (152) is slidingly connected with the radial dovetail base (154) through a dovetail groove, and the radial dovetail base (154) is drivingly connected with the adapter base (152) through a radial fine adjustment screw mechanism (153).

7. The spiral welded pipe outer weld on-line scarfing apparatus as claimed in claim 1 wherein, The ejector rod limiting mechanism (19) comprises a limiting mechanism mounting rack (193), a limiting rod (191) is mounted on the limiting mechanism mounting rack (193), and a limiting eye shaft bearing (192) is fixed to the first end of the limiting rod (191).

8. The spiral welded pipe outer weld on-line scarfing apparatus as claimed in claim 1 wherein, The combined adjustment dust collecting cover (182) is hinged below the belt sander (16), the dust collecting box (181) is located below the combined adjustment dust collecting cover (182), and the bottom of the dust collecting box (181) is provided with a roller facilitating movement.

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