Welding device for corrosion-resistant stainless steel seamless steel pipe

Abstract

The invention discloses a welding device for corrosion-resistant stainless steel seamless steel pipe pieces, and relates to the technical field of steel pipe welding. Two seamless steel pipes are firmly clamped through a first clamping mechanism and a second clamping mechanism correspondingly, and a first electric push rod is matched to drive a sliding table to drive the first clamping mechanism to move left and right; by arranging the first welding head on the outer side of the connecting position of the steel pipes, the second welding head is fixedly installed at the end of a third screw rod, and by means of meshing of an inner screw cylinder and the third screw rod, the steel pipes can be welded to the first welding head and the second welding head. And the second welding head can be driven to extend into the inner side of the steel pipe connecting position, so that the device can synchronously complete welding machining of the seamless steel pipe from the inner side and the outer side, the welding machining firmness of the seamless steel pipe can be effectively improved, the sealing effect in the welded steel pipe can be effectively improved, and the welding machining quality of the seamless steel pipe can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of steel pipe welding, in particular to a welding device for corrosion-resistant seamless stainless steel pipe fittings. Background Art

[0002] In the modern industrial field, corrosion-resistant stainless steel seamless pipe fittings are widely used in many industries such as petrochemical, marine engineering, food processing, and pharmaceuticals due to their excellent corrosion resistance, high strength, and good sealing. Pipelines constructed with corrosion-resistant stainless steel seamless pipe fittings can be used to transport various corrosive media or withstand high-pressure environments. In the process of pipeline construction, the radial welding process of seamless steel pipes is particularly important, and its welding quality is directly related to the safety and stability of the entire pipeline system.

[0003] The welding devices in the prior art have obvious limitations when dealing with welding operations of corrosion-resistant stainless steel seamless pipe fittings. The core functions of the existing welding devices are mostly concentrated on simple clamping and docking of steel pipes, which can ensure that the pipe fittings are in a relatively stable position during welding and preliminarily meet the basic welding positioning requirements. However, in the actual welding process, it is far from enough to simply achieve positioning. It is difficult to form a continuous extrusion pressure at the connection position between the two steel pipes for simple clamping and positioning of seamless steel pipes, which makes the contact at the connection position during steel pipe welding not tight enough, especially when the steel pipe needs to be adjusted in posture during welding, the movement and adjustment of the seamless steel pipe will cause changes in the connection position, affecting the final welding effect. In severe cases, it may even cause the steel pipe welding position to be poorly sealed, affecting the stability of the subsequent seamless steel pipe when used to construct the pipeline system.

[0004] Therefore, a welding device for corrosion-resistant seamless stainless steel pipe fittings is proposed to solve some problems existing in the above-mentioned prior art. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the seamless steel pipe welding device in the prior art that, during the actual welding process, the steel pipe can only be clamped and connected, and it is difficult to apply continuous extrusion force to the connection position, resulting in poor welding effect and affecting the stability of the steel pipe after welding. A welding device for corrosion-resistant stainless steel seamless pipe fittings is proposed.

[0006] In order to solve the problems existing in the prior art, the present invention adopts the following technical solutions:

[0007] The welding device of corrosion-resistant stainless steel seamless pipe fittings comprises a base, a slide table for sliding horizontally is installed on the top of the base, and a first clamping mechanism is installed on the slide table, a first electric push rod arranged parallel to the slide table is fixed on the base, a second clamping mechanism located on the right side of the first clamping mechanism is installed on the base, a lifting platform located below the second clamping mechanism is installed on the base, and a longitudinally rotating rotating wheel is rotatably installed on the lifting platform, a servo motor for driving the rotating wheel to rotate is installed in the lifting platform, a first welding head located between the first clamping mechanism and the second clamping mechanism is fixedly installed on the top of the base, a pedestal is fixedly installed on the left side of the top of the base, and an inner screw barrel arranged horizontally on the left side of the first clamping mechanism is rotatably installed in the pedestal, the inner thread of the inner screw barrel is screwed with a third screw arranged horizontally, and the right end of the third screw is fixedly installed with a second welding head, a third limit rod arranged parallel to the third screw is fixedly installed on the left end of the third screw, and the third limit rod is slidably connected to the pedestal, a third motor is fixedly installed on the top of the pedestal, and the driving shaft of the third motor is drivingly connected to the inner screw barrel.

[0008] Preferably, a first gear is rotatably installed in the middle position of the slide, and the front and rear sides of the first gear are meshed with first racks, a first motor for driving the first gear to rotate is fixedly installed at the bottom of the slide, and two first clamping mechanisms are provided, and the two first clamping mechanisms are respectively slidably installed on the left and right sides of the first gear, and the two first clamping mechanisms are respectively fixedly connected to the two first racks.

[0009] Preferably, the first clamping mechanism includes a first ring frame fixedly connected to the first rack, and a plurality of first screw sleeves distributed in a circumferential manner are rotatably installed on the first ring frame, a first screw is threadedly screwed in each first screw sleeve, and the first screw points to the center of the first ring frame, a first clamping block is fixedly installed on one end of the first screw close to the center of the first ring frame, and a first limiting rod arranged parallel to the first screw is fixedly installed on the side of the first clamping block away from the center of the first ring frame, the first limiting rod is slidably inserted on the first ring frame, a first roller rotating longitudinally is rotatably installed on one side of the first clamping block close to the center of the first ring frame, a first gear ring is fixedly sleeved on the outer side of the first screw sleeve, and a first gear ring meshing with a plurality of first gear rings is rotatably sleeved on the outer side of the first ring frame.

[0010] Preferably, the first screw sleeve at the bottom is arranged vertically, and the first screw sleeve at the bottom is fixedly connected to a first barrel rod which is vertically sleeved on the outside of the corresponding first screw rod, and the first bevel tooth is fixedly installed on the lower end of the first barrel rod, a spline rod which is laterally arranged below the first barrel rod is rotatably installed on the base, and a spline barrel is movably sleeved on the spline rod, a second bevel tooth which meshes with the corresponding first bevel tooth is fixedly installed on the spline barrel, and a servo motor for driving the spline rod to rotate is fixedly installed on the base.

[0011] The cam is an angularly arranged second gear that is fixedly mounted on the second support frame, and the cam is provided with a plurality of camshafts that are arranged in a circle and arranged in a circle.

[0012] Preferably, there are six second screw sleeves in total, of which three are distributed around the left side of the second gear ring, and the other three are distributed around the right side of the second gear ring, and there is an angle of 60° between two adjacent second screw sleeves on the left and right.

[0013] Preferably, a plurality of balls symmetrically arranged front and back are installed on the top of the lifting platform for rolling from left to right, a second electric push rod arranged vertically is fixedly installed in the base, and the telescopic end above the second electric push rod is fixedly connected to the lifting platform.

[0014] Preferably, the first welding head points to the rear outer end wall of the first clamping mechanism and the second clamping mechanism that clamps the pipe, and the second welding head points to the front inner end wall of the first clamping mechanism and the second clamping mechanism that clamps the pipe.

[0015] Preferably, a frame is fixedly connected to the rear of the base, and two longitudinally arranged first longitudinal beams are fixed side by side on the top of the frame, and a plurality of evenly distributed first recesses are provided on the first longitudinal beams from front to back, a bracket is provided in the frame and is located between the left and right first longitudinal beams, and two longitudinally arranged second longitudinal beams are fixed side by side on the top of the bracket, and second recesses corresponding to the plurality of first recesses are provided on the second longitudinal beams, and swing arms are rotatably connected to the front and rear sides of the bottom of the bracket, and the other end of the swing arm is rotatably connected to the frame, a fourth motor is fixedly installed in the frame, and a drive shaft of the fourth motor is fixedly connected to one of the swing arms, and a bracket extending between the left and right first clamping mechanisms is installed at the front end of the frame.

[0016] Preferably, a third electric push rod arranged longitudinally is fixedly installed in the frame, and a connecting frame is fixedly installed on the telescopic end in front of the third electric push rod, the bracket is rotatably connected to the top end of the connecting frame, and a torsion spring is installed between the bracket and the connecting frame.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. In the present invention, two seamless steel pipes are firmly clamped by the first clamping mechanism and the second clamping mechanism respectively, and the first electric push rod drives the slide table to drive the first clamping mechanism to move left and right, so that the connection between the two steel pipes can be kept pressurized and fitted during the welding process, which is conducive to ensuring the tight stability during welding. At the same time, by setting the first welding head outside the steel pipe connection position and fixing the second welding head on the end of the third screw, the second welding head can be driven to probe into the inside of the steel pipe connection position by means of the meshing of the inner screw barrel and the third screw, so that the device can synchronously complete the welding process of the seamless steel pipe from both inside and outside, which can not only effectively improve the firmness of the seamless steel pipe welding process, but also effectively improve the sealing effect inside the steel pipe after welding, which is conducive to improving the quality of the seamless steel pipe welding process;

[0019] 2. In the present invention, by providing two left and right first clamping mechanisms, and fixing the two first racks meshing with the front and rear sides of the first gear respectively with the two first clamping mechanisms, the staff can drive the two first clamping mechanisms to move synchronously relative to each other through the first motor, and cooperate with the structure provided on the rear frame of the base to intermittently convey the seamless steel pipe, so as to facilitate the automatic feeding and clamping operation of the seamless steel pipe. At the same time, the first clamping mechanism is driven to move horizontally by the first electric push rod, and the first clamping mechanism is cooperated to clamp and loosen the seamless steel pipe, so that the seamless steel pipe can be conveyed to the right after welding is completed, and the seamless steel pipe can be continuously welded in cooperation with the automatic feeding mechanism, which is conducive to improving the efficiency of welding production;

[0020] 3. In the present invention, a radially rotating first roller is rotatably installed on a first clamping block, and a radially rotating second roller is rotatably installed on a second clamping block, so that when the first clamping mechanism and the second clamping mechanism clamp the seamless steel pipe, the axial movement of the seamless steel pipe is restricted, but the radial rotation is not restricted. By driving the seamless steel pipe to rotate radially with the rotating wheel, the first welding head and the second welding head can simultaneously complete the circumferential welding from both the inside and the outside, thereby improving the convenience and efficiency of the welding process to a certain extent. At the same time, by offsetting the pointing positions of the first welding head and the second welding head by an angle difference of 180°, the inner and outer welding points will not overlap at the same time, thereby avoiding melting through of the steel pipe, which is beneficial to ensuring the stability during internal and external synchronous welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0022] Figure 1 A perspective view of the present invention;

[0023] Figure 2 A three-dimensional diagram of the slide, the first clamping mechanism, the first gear and the first rack of the present invention;

[0024] Figure 3 The figure is a disassembled diagram of the slide table and the first clamping mechanism of the present invention;

[0025] Figure 4 It is a three-dimensional diagram of the second clamping mechanism, lifting platform, ball bearing and rotating wheel of the present invention;

[0026] Figure 5 is a disassembled diagram of the second clamping mechanism of the present invention;

[0027] Figure 6 It is a stereoscopic diagram of the inner screw barrel, the third screw rod, the second welding head and the third limiting rod of the present invention;

[0028] Figure 7 It is a three-dimensional diagram of the structure on the frame of the present invention;

[0029] Figure 8 A top view of the present invention;

[0030] Fig. 9 For the present invention Figure 8 Sectional view at AA in the middle;

[0031] Fig.10 For the present invention Figure 8 Sectional view at the middle BB;

[0032] Fig.11 For the present invention Figure 8 Sectional view at CC;

[0033] Fig.12 For the present invention Figure 8 Sectional view at DD in the middle;

[0034] Fig.13 It is a left side view of the present invention;

[0035] Fig.14 It is a front view of the present invention;

[0036] Fig.15 For the present invention Fig.14 Cross-sectional view at EE in the middle.

[0037] Serial number in the picture:

[0038] 1. Base; 2. Slide; 201. First clamping mechanism; 2011. First ring frame; 2012. First screw sleeve; 2013. First screw rod; 2014. First clamping block; 2015. First limit rod; 2016. First roller; 2017. First gear ring; 2018. First gear ring; 202. First electric push rod; 203. First gear; 204. First rack; 205. First motor; 206. First cylinder rod; 207. First bevel gear; 208. Spline rod; 209. Spline cylinder; 210. Second bevel gear; 3. Second clamping mechanism; 301. Second ring frame; 302. Second screw sleeve; 303. Second screw rod; 304. Second clamping block; 305 , the second limiting rod; 306, the second roller; 307, the second gear ring; 308, the second gear ring; 309, the second cylinder rod; 310, the second motor; 4, the lifting platform; 401, the ball; 402, the rotating wheel; 403, the second electric push rod; 5, the first welding head; 501, the base; 502, the inner screw barrel; 503, the third screw; 504, the second welding head; 505, the third limiting rod; 506, the third motor; 6, the frame; 601, the first longitudinal beam; 602, the first notch; 603, the bracket; 604, the second longitudinal beam; 605, the second notch; 606, the swing arm; 607, the fourth motor; 608, the bracket; 609, the third electric push rod; 610, the connecting frame. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0040] Embodiment: This embodiment provides a welding device for corrosion-resistant stainless steel seamless pipe fittings, see Figure 1 - Fig.15Specifically, it includes a base 1, a slide 2 for horizontal sliding is installed on the top of the base 1, and a first clamping mechanism 201 is installed on the slide 2, a first electric push rod 202 arranged parallel to the slide 2 is fixed on the base 1, a second clamping mechanism 3 located on the right side of the first clamping mechanism 201 is installed on the base 1, a lifting platform 4 located below the second clamping mechanism 3 is installed on the base 1, and a longitudinally rotating wheel 402 is rotatably installed on the lifting platform 4, a servo motor for driving the rotating wheel 402 to rotate is installed in the lifting platform 4, and a first electric push rod 202 located on the top of the base 1 is fixedly installed between the first clamping mechanism 201 and the second clamping mechanism 3 A welding head 5, a pedestal 501 is fixedly installed on the top left side of the base 1, and an inner screw barrel 502 is rotatably installed in the pedestal 501 and is laterally arranged on the left side of the first clamping mechanism 201, the inner thread of the inner screw barrel 502 is screwed with a laterally arranged third screw rod 503, and a second welding head 504 is fixedly installed on the right end of the third screw rod 503, a third limiting rod 505 arranged parallel to the third screw rod 503 is fixedly installed on the left end of the third screw 503, and the third limiting rod 505 is slidably connected to the pedestal 501, a third motor 506 is fixedly installed on the top of the pedestal 501, and the driving shaft of the third motor 506 is transmission-connected to the inner screw barrel 502.

[0041] When the device is in operation, the staff inserts a seamless steel pipe into the second clamping mechanism 3, clamps and fixes it through the second clamping mechanism 3, and makes the rotating wheel 402 fit tightly with the outer end wall of the seamless steel pipe. Then, the staff inserts another seamless steel pipe into the first clamping mechanism 201, clamps and fixes it through the first clamping mechanism 201. Subsequently, the staff starts the first electric push rod 202 to push the slide 2, driving the first clamping mechanism 201 to carry the seamless steel pipe clamped therein to move toward the second clamping mechanism 3, and finally makes the seamless steel pipe clamped in the first clamping mechanism 201 and the end of the seamless steel pipe clamped in the second clamping mechanism 3 fit tightly, and keeps the two steel pipes under pressure during the welding process, which is conducive to ensuring the tightness and stability during welding.

[0042] When welding, the connection position of the two steel pipes is at the corresponding position of the first welding head 5, and synchronously, the third motor 506 is powered on and started to drive the inner screw barrel 502 to rotate in the base 501. With the help of the threaded connection between the inner screw barrel 502 and the third screw rod 503, and the lateral sliding of the third limit rod 505 and the base 501, when the inner screw barrel 502 rotates, the third screw rod 503 can move left and right. By controlling the third motor 506 to drive the rotation direction of the inner screw barrel 502, the position of the second welding head 504 at the end of the third screw 503 is controlled, and finally the second welding head 504 is inserted in the gap. The rotary wheel 402 is driven by the servo motor to rotate, and the two seamless steel pipes are driven to rotate radially synchronously. During the rotation, the radial welding process between the two seamless steel pipes is completed. At the same time, the welding process is performed on both sides of the connection position, which can effectively improve the firmness of the seamless steel pipe welding process and is beneficial to improving the sealing effect inside the steel pipe after welding.

[0043] After a single welding is completed, the first electric push rod 202 pushes the first clamping mechanism 201 to move left and right. In conjunction with the clamping and releasing of the seamless steel pipe by the first clamping mechanism 201, the welded seamless steel pipe can be transported to the right, facilitating subsequent continuous welding processing.

[0044] In the specific implementation process, Figure 2 and Figure 3As shown, a first gear 203 is rotatably installed in the middle position of the slide 2, and the front and rear sides of the first gear 203 are meshed with first racks 204. A first motor 205 for driving the first gear 203 to rotate is fixedly installed at the bottom of the slide 2. Two first clamping mechanisms 201 are provided. The two first clamping mechanisms 201 are respectively slidably installed on the left and right sides of the first gear 203. The two first clamping mechanisms 201 are respectively fixedly connected to the two first racks 204. When the device is running, the two first clamping mechanisms 201 are respectively arranged on the left and right sides of the slide 2. When the first clamping mechanism 201 is used to clamp the seamless steel pipe, the staff can place the seamless steel pipe between the left and right first clamping mechanisms 201, and then drive the first motor 205 to be powered on and started. After 05 is powered on and started, it will drive the first gear 203 fixed on its driving shaft to rotate, and then with the help of the meshing of the first gear 203 and the first racks 204 on the front and rear sides, the first racks 204 on the front and rear sides are driven to move relatively synchronously, thereby driving the left and right first clamping mechanisms 201 to approach each other synchronously. After the positions of the left and right first clamping mechanisms 201 are moved, they are sleeved on the outer sides of the left and right ends of the seamless steel pipe, and then the first clamping mechanisms 201 are used to clamp the left and right ends of the seamless steel pipe at the same time, which can effectively improve the stability of the clamping of the seamless steel pipe during welding. After a single welding is completed, the first clamping mechanism 201 releases the clamping of the seamless steel pipe, and then the first motor 205 drives in reverse to drive the left and right first clamping mechanisms 201 to reset, so as to facilitate the convenient clamping of other subsequent steel pipes.

[0045] In the specific implementation process, Figure 3 and Fig.10 As shown, the first clamping mechanism 201 includes a first ring frame 2011 fixedly connected to the first rack 204, and a plurality of first screw sleeves 2012 are rotatably mounted on the first ring frame 2011 and are distributed around. A first screw rod 2013 is screwed in each first screw sleeve 2012, and the first screw rod 2013 points to the center of the first ring frame 2011. A first clamping block 2014 is fixedly mounted on one end of the first screw rod 2013 close to the center of the first ring frame 2011, and the first clamping block 2014 is away from the first ring frame. A first limiting rod 2015 arranged parallel to the first screw rod 2013 is fixedly installed on one side of the center of the circle 2011, and the first limiting rod 2015 is slidably inserted on the first ring frame 2011. A first roller 2016 that rotates longitudinally is rotatably installed on the first clamping block 2014 close to the side of the center of the circle of the first ring frame 2011. A first gear ring 2017 is fixedly sleeved on the outer side of the first screw sleeve 2012, and a first gear ring 2018 that meshes with a plurality of first gear rings 2017 is rotatably sleeved on the outer side of the first ring frame 2011.

[0046] When the device is in operation, when the first clamping mechanism 201 is used to clamp the seamless steel pipe, the first gear ring 2018 rotates, and the first gear ring 2018 and the plurality of first gear rings 2017 are meshed to drive the plurality of first screw sleeves 2012 distributed around to rotate, and the first screw sleeves 2012 are meshed with the corresponding first screw rods 2013, and the first limit rod 2015 is slidably connected with the first ring frame 2011 to limit the movement of the first clamping block 2014, so that the first clamping block 2014 can be driven to move toward the center of the first ring frame 2011, and the plurality of first clamping blocks 2014 are in the corresponding first screw rods 2013. Under the support of 2013, it moves synchronously toward the center direction of the first ring frame 2011, and finally the seamless steel pipe can be firmly clamped on the central axis of the first ring frame 2011. The clamping is convenient, flexible, firm and stable. During the clamping process, the first roller 2016 is rotatably installed on the first clamping block 2014. With the help of the radial rolling of the first roller 2016, the seamless steel pipe cannot move axially during the clamping process by the first clamping mechanism 201, and the radial rotation is not restricted, so that the device can easily complete the circumferential welding by driving the seamless steel pipe to rotate, which is beneficial to improving the convenience and efficiency of the welding process.

[0047] In the specific implementation process, Figure 3 and Fig. 9 As shown, the lowermost first screw sleeve 2012 is vertically arranged, and the lowermost first screw sleeve 2012 is fixedly connected with a first barrel rod 206 vertically sleeved on the outer side of the corresponding first screw rod 2013, and the lower end of the first barrel rod 206 is fixedly installed with a first bevel tooth 207, a spline rod 208 horizontally arranged below the first barrel rod 206 is rotatably installed on the base 1, and a spline barrel 209 is movably sleeved on the spline rod 208, and a second bevel tooth 210 meshing with the corresponding first bevel tooth 207 is fixedly installed on the spline barrel 209, and a servo motor for driving the spline rod 208 to rotate is fixedly installed on the base 1.

[0048] When the device is running, in the process of driving the first clamping mechanism 201 to clamp or release the seamless steel pipe, the servo motor installed on the base 1 is started, driving the spline rod 208 fixedly connected to its drive shaft to rotate. Since the spline cylinder 209 is slidably sleeved on the outside of the spline rod 208, the spline cylinder 209 can only slide axially relative to the spline rod 208, and the two cannot rotate radially. This makes the spline cylinder 209 rotate synchronously during the rotation of the spline rod 208, and then the rotational power is transmitted to the first cylinder rod 206 by means of the meshing of the second bevel gear 210 and the first bevel gear 207. The rotational power is finally inputted into the first screw sleeve 2012 vertically arranged on the bottom central axis of the first clamping mechanism 201, and the rotational power is transmitted to each first screw sleeve 2012 by means of the meshing of the first gear ring 2018 and the first gear ring 2017 outside the plurality of first screw sleeves 2012. Moreover, since the spline cylinder 209 can slide axially on the spline rod 208, the movement and adjustment of the first clamping mechanism 201 will not interfere with the rotational power transmission of the first screw sleeve 2012 therein, which is conducive to ensuring the convenience and stability of the device when simultaneously controlling the clamping or releasing of the two first clamping mechanisms 201 on the left and right sides.

[0049] In the specific implementation process, Figure 1 , Figure 4 , Figure 5 and Fig.11 As shown, the second clamping mechanism 3 includes a second ring frame 301 fixedly connected to the top of the base 1, and a plurality of second screw sleeves 302 distributed around the second ring frame 301 are rotatably installed, each second screw sleeve 302 is screwed with a second screw rod 303, and the second screw rod 303 points to the center of the second ring frame 301, and a second clamping block 304 is fixedly installed on one end of the second screw rod 303 close to the center of the second ring frame 301, and a second limiting rod 305 arranged parallel to the second screw rod 303 is fixedly installed on the side of the second clamping block 304 away from the center of the second ring frame 301, and the second limiting rod 305 is slidably plugged into the second ring frame 301 A second roller 306 that rotates longitudinally is rotatably installed on one side of the second clamping block 304 close to the center of the second ring frame 301, a second gear ring 307 is fixedly sleeved on the outer side of the second screw sleeve 302, and a second gear ring 308 that meshes with a plurality of second gear rings 307 is rotatably sleeved on the outer side of the second ring frame 301. The lowermost second screw sleeve 302 is vertically arranged, and a second barrel rod 309 that is vertically sleeved on the outer side of the corresponding second screw rod 303 is fixedly connected to the lowermost second screw sleeve 302. A second motor 310 is fixedly installed in the base 1, and the second barrel rod 309 movably penetrates the lifting platform 4 and is fixedly connected to the driving shaft of the second motor 310.

[0050] When the device is running, when the second clamping mechanism 3 is needed to clamp or release the steel pipe, the second motor 310 is powered on and started, driving the second barrel rod 309 fixedly connected to its drive shaft to rotate, and the second barrel rod 309 is connected to the second screw sleeve 302 vertically arranged on the lower central axis to transmit the rotational power to one second screw sleeve 302, and then the second gear ring 308 is meshed with the second gear ring 307 on the outer side of each second screw sleeve 302 to synchronously transmit the rotational power to many second screw sleeves 302. By means of the threaded connection between the second screw sleeve 302 and the second screw rod 303, and the sliding connection between the second limit rod 305 and the second ring frame 301, the second screw rod 303 can drive the second clamping block 304 to move toward the center of the second clamping mechanism 3, and many second clamping blocks 304 synchronously approach the center of the second clamping mechanism 3, and finally the seamless steel pipe can be stably clamped on the central axis of the second ring frame 301, so as to cooperate with the first clamping mechanism 201 to carry another seamless steel pipe for precise docking.

[0051] By rotating the radially rolling second roller 306 on the second clamping block 304, when the second clamping mechanism 3 clamps the seamless steel pipe, the seamless steel pipe cannot move axially relative to the second clamping mechanism 3, but can rotate radially, cooperating with the first clamping mechanism 201 to synchronously clamp another seamless steel pipe, it is beneficial to improve the stability and convenience of the device in completing circumferential welding by driving the steel pipe to rotate.

[0052] In the specific implementation process, Figure 4 , Figure 5 and Fig.11 As shown, there are six second screw sleeves 302 in total, three of which are distributed on the left side of the second toothed ring 308, and the other three second screw sleeves 302 are distributed on the right side of the second toothed ring 308. There is an angle of 60° between two adjacent second screw sleeves 302 on the left and right. When the device is in operation, when the second clamping mechanism 3 is used to clamp the seamless steel pipe, the plurality of second screw sleeves 302 are evenly distributed on the left and right sides of the second toothed ring 308, so that when the second clamping mechanism 3 clamps the seamless steel pipe, the clamped surface is wider and more uniform, which can effectively improve the stability of the seamless steel pipe clamped in the second clamping mechanism 3.

[0053] In the specific implementation process, Figure 1 and Figure 4As shown, a plurality of balls 401 symmetrically arranged front and back are installed on the top of the lifting platform 4 in a rolling manner from left to right, a second electric push rod 403 vertically arranged is fixedly installed in the base 1, and the telescopic end above the second electric push rod 403 is fixedly connected to the lifting platform 4. When the device is in operation, the lifting platform 4 can be driven to move up and down by the second electric push rod 403. After adjustment, the top of the ball 401 is lifted to the bottom of the seamless steel pipe clamped in the second clamping mechanism 3. With the support of the ball 401, the stability of the seamless steel pipe clamped in the second clamping mechanism 3 after welding and lengthening can be further improved. Since the lifting platform 4 can be adjusted up and down by the second electric push rod 403, in conjunction with the clamping of the first clamping mechanism 201 and the second clamping mechanism 3, the device can be adapted to the welding processing of seamless steel pipes of different outer diameters. When the ball 401 rollingly installed on the top of the lifting platform 4 lifts the seamless steel pipe, it will not interfere with the lateral movement and longitudinal rotation of the steel pipe, which is beneficial to ensuring the stability of the device during operation.

[0054] In the specific implementation process, Fig.10 and Fig.15 As shown, the first welding head 5 points to the rear outer end wall of the pipe clamped in the first clamping mechanism 201 and the second clamping mechanism 3, and the second welding head 504 points to the front inner end wall of the pipe clamped in the first clamping mechanism 201 and the second clamping mechanism 3. When the device is in operation, the first welding head 5 and the second welding head 504 are used to perform welding processing on the outside and inside of the seamless steel pipe connection position respectively. In order to avoid the first welding head 5 and the second welding head 504 welding processing points overlapping inside and outside, resulting in the steel pipe connection position being melted through, the pointing positions of the first welding head 5 and the second welding head 504 are offset by an angle difference of 180°, so that the inner and outer welding points will not overlap at the same time, which is beneficial to ensuring the stability during internal and external synchronous welding.

[0055] In the specific implementation process, Figure 1 , Figure 7 - Figure 8 and Fig.12 - Fig.13As shown, a frame 6 is fixedly connected to the rear of the base 1, and two longitudinally arranged first longitudinal beams 601 are fixed side by side on the top of the frame 6, and a plurality of evenly distributed first notches 602 are provided on the first longitudinal beam 601 from front to back, a bracket 603 is provided in the frame 6 and is located between the two left and right first longitudinal beams 601, and two longitudinally arranged second longitudinal beams 604 are fixed side by side on the top of the bracket 603, and second notches 605 corresponding to the plurality of first notches 602 are provided on the second longitudinal beam 604, and swing arms 606 are rotatably connected to the front and rear sides of the bottom of the bracket 603, and the other end of the swing arm 606 is rotatably connected to the frame 6, a fourth motor 607 is fixedly installed in the frame 6, and the drive shaft of the fourth motor 607 is fixedly connected to one of the swing arms 606, and a bracket 608 extending between the left and right first clamping mechanisms 201 is installed at the front end of the frame 6.

[0056] When the device is in operation, the seamless steel pipe can be automatically transported between the two left and right first clamping mechanisms 201 through the operation of the relevant structure arranged on the rear frame 6 of the base 1, and then clamped by the first clamping mechanism 201 for welding processing. During operation, the seamless steel pipe is transported from the rear of the frame 6, and is initially in the first recess 602 at the rear end of the first longitudinal beam 601. Then the fourth motor 607 is powered on and started, driving the swing arm 606 fixedly connected to its drive shaft to rotate and swing. Through the swing of the swing arm 606, the bracket 603 is driven to make an eccentric movement. Synchronously, the bracket 603 drives the second longitudinal beam 604 to make an eccentric movement. When the bracket 603 carries the second longitudinal beam 604 to move upward from the bottom of the first longitudinal beam 601, the second longitudinal beam 604 lifts the seamless steel pipe out of the first recess 602. When the first longitudinal beam 601 moves downward, the second longitudinal beam 604 places the seamless steel pipe in the previous first recess 602, and realizes the step-by-step transportation of the seamless steel pipe under the reciprocating cycle. Finally, the seamless steel pipe is transported to the bracket 608, and moves to the front along the guidance of the slope on the bracket 608, just between the two left and right first clamping mechanisms 201, and then the two left and right first clamping mechanisms 201 are moved and sleeved on the outer side of the end of the seamless steel pipe under the drive of the first motor 205 to clamp the seamless steel pipe in preparation for welding. The device can realize automatic loading operation of seamless steel pipe during welding through the eccentric swinging motion of the second longitudinal beam 604 and the first recesses 602 evenly opened on the first longitudinal beam 601. The loading is convenient and efficient, and can effectively reduce the labor burden of the staff, which is conducive to improving the efficiency of welding production.

[0057] In the specific implementation process, as shown in the figures and the figures, a third electric push rod 609 arranged longitudinally is fixedly installed in the frame 6, and a connecting frame 610 is fixedly installed on the telescopic end in front of the third electric push rod 609, the bracket 608 is rotatably connected to the top of the connecting frame 610, and a torsion spring is installed between the bracket 608 and the connecting frame 610. When the device is running, under the elastic support of the torsion spring between the bracket 608 and the connecting frame 610, the bracket 608 and the connecting frame 610 are vertically arranged. When it is necessary to transport the seamless steel pipe between the left and right first clamping mechanisms 201, the third electric push rod 609 will drive the connecting frame 610 to drive the bracket 608 to move forward, so that the seamless steel pipe lifted by the front end of the bracket 608 The steel pipe is transported between the two left and right first clamping mechanisms 201. After the loading is completed and the seamless steel pipe is firmly clamped by the first clamping mechanism 201, in order to avoid the existence of the spline rod 208 interfering with the lateral movement of the first clamping mechanism 201, the third electric push rod 609 will drive the connecting frame 610 to drive the bracket 608 to move backward, and remove the lateral movement path of the first clamping mechanism 201. During the backward movement of the bracket 608, since the seamless steel pipe is fixed by the first clamping mechanism 201, the relative extrusion formed by the movement will cause the bracket 608 to deflect downward, and after leaving the extrusion area, it will automatically reset under the elastic support of the torsion spring, so as to facilitate the device to cyclically perform the automatic loading operation of the seamless steel pipe.

[0058] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A welding device for corrosion-resistant seamless stainless steel pipe fittings, comprising a base (1), characterized in that: A slide table (2) that slides laterally is installed on the top of the base (1), and a first clamping mechanism (201) is installed on the slide table (2); a first electric push rod (202) that is arranged parallel to the slide table (2) is fixed on the base (1); a second clamping mechanism (3) located on the right side of the first clamping mechanism (201) is installed on the base (1); a lifting platform (4) located below the second clamping mechanism (3) is installed on the base (1), and a longitudinally rotating wheel (402) is rotatably installed on the lifting platform (4); a servo motor for driving the rotating wheel (402) to rotate is installed in the lifting platform (4); a first welding rod (201) located between the first clamping mechanism (201) and the second clamping mechanism (3) is fixedly installed on the top of the base (1); A joint (5), a pedestal (501) is fixedly installed on the left side of the top of the base (1), and an inner screw barrel (502) is rotatably installed in the pedestal (501) and is laterally arranged on the left side of the first clamping mechanism (201), the inner thread of the inner screw barrel (502) is screwed with a third screw rod (503) arranged laterally, and a second welding head (504) is fixedly installed on the right end of the third screw rod (503), a third limit rod (505) arranged parallel to the third screw rod (503) is fixedly installed on the left end of the third screw rod (503), and the third limit rod (505) is slidably connected to the pedestal (501), a third motor (506) is fixedly installed on the top of the pedestal (501), and the driving shaft of the third motor (506) is transmission-connected to the inner screw barrel (502).

2. The welding device for corrosion-resistant seamless stainless steel pipe according to claim 1 is characterized in that: A first gear (203) is rotatably mounted in the middle position of the slide (2), and first racks (204) are meshedly connected to the front and rear sides of the first gear (203). A first motor (205) for driving the first gear (203) to rotate is fixedly mounted at the bottom of the slide (2). Two first clamping mechanisms (201) are provided, and the two first clamping mechanisms (201) are respectively slidably mounted on the left and right sides of the first gear (203), and the two first clamping mechanisms (201) are respectively fixedly connected to the two first racks (204).

3. The welding device for corrosion-resistant seamless stainless steel pipe according to claim 2 is characterized in that: The first clamping mechanism (201) comprises a first ring frame (2011) fixedly connected to the first rack (204), and a plurality of first screw sleeves (2012) are rotatably mounted on the first ring frame (2011), each of the first screw sleeves (2012) is screwed with a first screw rod (2013), and the first screw rod (2013) points to the center of the first ring frame (2011), and a first clamping block (2014) is fixedly mounted on one end of the first screw rod (2013) close to the center of the first ring frame (2011), and the first clamping block (2014) is away from the first ring frame (2011). A first limiting rod (2015) is fixedly installed on one side of the center of the circle and is arranged parallel to the first screw rod (2013); the first limiting rod (2015) is slidably inserted on the first ring frame (2011); a first roller (2016) that rotates longitudinally is rotatably installed on one side of the first clamping block (2014) close to the center of the circle of the first ring frame (2011); a first gear ring (2017) is fixedly sleeved on the outer side of the first screw sleeve (2012); and a first gear ring (2018) that meshes with a plurality of first gear rings (2017) is rotatably sleeved on the outer side of the first ring frame (2011).

4. The welding device for corrosion-resistant seamless stainless steel pipe according to claim 3 is characterized in that: The first screw sleeve (2012) at the bottom is vertically arranged, and the first screw sleeve (2012) at the bottom is fixedly connected to a first tube rod (206) vertically sleeved on the outside of the corresponding first screw rod (2013), and the lower end of the first tube rod (206) is fixedly installed with a first bevel tooth (207), a spline rod (208) horizontally arranged below the first tube rod (206) is rotatably installed on the base (1), and a spline cylinder (209) is movably sleeved on the spline rod (208), and a second bevel tooth (210) meshing with the corresponding first bevel tooth (207) is fixedly installed on the spline cylinder (209), and a servo motor for driving the spline rod (208) to rotate is fixedly installed on the base (1).

5. The welding device for corrosion-resistant seamless stainless steel pipe according to claim 1, characterized in that: The second clamping mechanism (3) comprises a second ring frame (301) fixedly connected to the top of the base (1), and a plurality of second screw sleeves (302) are rotatably mounted on the second ring frame (301), each of the second screw sleeves (302) is screwed with a second screw rod (303), and the second screw rod (303) points to the center of the second ring frame (301), a second clamping block (304) is fixedly mounted on one end of the second screw rod (303) close to the center of the second ring frame (301), and a second limiting rod (305) arranged parallel to the second screw rod (303) is fixedly mounted on the side of the second clamping block (304) away from the center of the second ring frame (301), and the second limiting rod (305) is slidably plugged into the second ring frame (301). A second roller (306) is rotatably mounted on one side of the second clamping block (304) near the center of the second ring frame (301) so as to rotate longitudinally; a second gear ring (307) is fixedly sleeved on the outer side of the second screw sleeve (302); a second gear ring (308) meshing with a plurality of second gear rings (307) is rotatably sleeved on the outer side of the second ring frame (301); the second screw sleeve (302) at the bottom is vertically arranged, and a second barrel rod (309) vertically sleeved on the outer side of the corresponding second screw rod (303) is fixedly connected to the second screw sleeve (302) at the bottom; a second motor (310) is fixedly mounted inside the base (1); the second barrel rod (309) movably penetrates the lifting platform (4) and is fixedly connected to the driving shaft of the second motor (310).

6. The welding device for corrosion-resistant seamless stainless steel pipe according to claim 5, characterized in that: There are six second screw sleeves (302) in total, three of which are distributed around the left side of the second gear ring (308), and the other three are distributed around the right side of the second gear ring (308), and there is an angle of 60° between two adjacent second screw sleeves (302) on the left and right.

7. The welding device for corrosion-resistant seamless stainless steel pipe according to claim 1, characterized in that: A plurality of front-to-back symmetrically arranged balls (401) are installed on the top of the lifting platform (4) in a rolling manner from left to right, a second electric push rod (403) is fixedly installed vertically in the base (1), and the telescopic end above the second electric push rod (403) is fixedly connected to the lifting platform (4).

8. The welding device for corrosion-resistant seamless stainless steel pipe according to claim 1, characterized in that: The first welding head (5) points to the rear outer end wall of the pipe clamped in the first clamping mechanism (201) and the second clamping mechanism (3), and the second welding head (504) points to the front inner end wall of the pipe clamped in the first clamping mechanism (201) and the second clamping mechanism (3).

9. The welding device for corrosion-resistant seamless stainless steel pipe according to claim 1, characterized in that: The rear of the base (1) is fixedly connected to a frame (6), and two longitudinally arranged first longitudinal beams (601) are fixed side by side on the top of the frame (6), and a plurality of evenly distributed first notches (602) are provided on the first longitudinal beam (601) from front to back, and a bracket (603) is provided in the frame (6) between the left and right first longitudinal beams (601), and two longitudinally arranged second longitudinal beams (604) are fixed side by side on the top of the bracket (603), and the second longitudinal beams (604) are provided with first notches (602) which are evenly distributed from front to back. A plurality of first notches (602) correspond to second notches (605) one by one, the bottom front and rear sides of the bracket (603) are rotatably connected to swing arms (606), and the other end of the swing arm (606) is rotatably connected to the frame (6), a fourth motor (607) is fixedly installed in the frame (6), and the drive shaft of the fourth motor (607) is fixedly connected to one of the swing arms (606), and a bracket (608) extending between the left and right first clamping mechanisms (201) is installed at the front end of the frame (6).

10. The welding device for corrosion-resistant seamless stainless steel pipe according to claim 9, characterized in that: A third electric push rod (609) arranged longitudinally is fixedly installed in the frame (6), and a connecting frame (610) is fixedly installed on the telescopic end in front of the third electric push rod (609), the bracket (608) is rotatably connected to the top end of the connecting frame (610), and a torsion spring is installed between the bracket (608) and the connecting frame (610).

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