A pressure vessel inner vessel welding workstation

Abstract

The application provides a pressure vessel inner container welding workstation, which comprises an equipment rack, a clamping assembly installed on the equipment rack and used for clamping a closed end, a rotary clamping mechanism installed on the equipment rack and used for clamping a pipe, and an infrared heating welding integrated module installed on the equipment rack and located at one side of the pipe. The clamping assembly and the rotary clamping mechanism can rotate the closed end and the pipe around their own axes. A first screw nut mechanism is arranged on the equipment rack and used for driving the clamping assembly to move along the axial direction of the pipe. The pressure vessel inner container welding workstation adopts a non-contact infrared heating process, so that the product is not adhered and not pulled. The welding assembly is the infrared heating welding integrated module. The welds of the adjacent pipe and the closed end can be rapidly condensed under the action of infrared rays, and are adhered together after being pressed and cooled, and can obtain very high welding strength, and do not produce the phenomena of adhesion and pulling.

Description

Technical Field

[0001] This invention belongs to the field of pressure vessel liner welding technology, and particularly relates to a pressure vessel liner welding workstation. Background Technology

[0002] A pressure vessel is a sealed container capable of withstanding pressure. Pressure vessels have extremely wide applications and play an important role in many sectors, including industry, civil use, military industry, and scientific research.

[0003] The manufacturing technology of the inner liner is the most crucial technology for pressure vessels. The manufacturing quality of the inner liner directly affects the lifespan and safety of the pressure vessel. To extend the lifespan of a pressure vessel, the inner liner must possess high manufacturing quality and good performance. Achieving these performance characteristics hinges on the selection of the inner liner material and the level of craftsmanship in its production.

[0004] The inner liner of a pressure vessel is a thin-walled pressure vessel made of plastic. Its main manufacturing process is welding, specifically the welding of the two circumferential welds connecting the cylinder body to the end caps. How to effectively reduce welding defects and improve the welding quality of the inner liner has always been a problem closely watched and addressed by technical personnel in various companies.

[0005] Currently, the welding of the two circumferential welds between the cylinder body and the end caps uses a hot plate heating method. When the hot plate is pulled out, it causes material sticking and stringing, affecting the welding quality. Furthermore, the existing inner liner welding equipment has a relatively limited function, requiring the welded inner liner to be transferred to other equipment for cutting and grinding processes, which affects production efficiency.

[0006] Furthermore, the clamping of the inner liner uses two semicircles to clamp the pipe and the closed end in a clamping manner, and the clamping and fixing are achieved by locking the two semicircles. This clamping structure not only fails to meet the requirements of automated welding, but also makes it difficult to continuously adjust the locking position because it is generally a fixed position. Existing pipe welding equipment cannot tolerate product size deviations. At the same time, after the product is clamped, it cannot be rotated. This not only reduces the working efficiency of the existing clamping components for welding the inner liner of pressure vessels, leaving hidden dangers for the subsequent fully automated welding process, but also reduces the welding quality due to the inability to adapt to different sizes of pipe parts to be welded and the inability to rotate in coordination during the automated welding process. This leads to welding defects such as weld deviation, unevenness, and incomplete penetration during the welding process.

[0007] Therefore, how to provide a pressure vessel liner welding workstation that can eliminate defects in the hot plate heating process and has high welding efficiency has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0008] This invention provides a welding workstation for the inner liner of a pressure vessel, used for welding the weld between a pipe and its adjacent closed end, comprising:

[0009] Equipment rack;

[0010] Clamping assembly, mounted on the equipment frame, is used to clamp the closed end;

[0011] A rotary clamping mechanism, mounted on the equipment frame, is used to clamp pipes;

[0012] This also includes an infrared heating welding integrated module, which is installed on the equipment frame and located on one side of the pipe;

[0013] Among them, the clamping assembly and the rotating clamping mechanism can both enable the closed end and the pipe being clamped to rotate around their own axis.

[0014] The equipment frame is equipped with a first slide rail, and the bottom of each clamping component is equipped with a bottom slide block that matches the first slide rail. The equipment frame is also equipped with a first screw and nut mechanism that drives the clamping components to move along the axial direction of the pipe.

[0015] The beneficial effects of this invention are:

[0016] (1) The pressure vessel inner liner welding workstation of the present invention adopts a non-contact infrared heating process to ensure that the product does not stick or draw wires. The welding component is an infrared heating welding integrated module. The weld seam of adjacent pipes and closed ends can be rapidly condensed under the action of infrared rays. After pressing and cooling, they are bonded together and can obtain extremely high welding strength without producing phenomena such as sticking or drawing wires.

[0017] (2) Both the clamping assembly and the rotating clamping mechanism can make their respective clamped objects rotate around their own axes. Thus, the clamping assembly and the rotating clamping mechanism clamp the closed end and the pipe respectively, align the two, and start the infrared heating welding integrated module to heat the weld between the two. The clamping assembly and the rotating clamping mechanism drive the closed end and the pipe to rotate synchronously, and the weld can be rapidly solidified under the action of infrared rays.

[0018] (3) The infrared heating welding cutting device of the present invention integrates an infrared heating welding mold and a cutting module. It has a simple structure, realizes multiple functions, and is conducive to simplifying the overall structure of the welding workstation and making full use of space. The cutting module integrates three functions: leveling, cutting and grinding. It has a simple structure, realizes the multiple functions of the cutting module, and is further conducive to simplifying the overall structure of the welding workstation and making full use of space.

[0019] (4) The forward and backward movement of the movable blade and the grinding assembly is driven by a drive unit with only one power source, and the movable blade and the grinding assembly move in opposite directions. Thus, one of the movable blade and the grinding assembly works in the front while the other waits in the rear. The drive structure for the forward and backward movement of the movable blade and the grinding assembly is simple, requiring only one power source to drive both, thus saving energy.

[0020] (5) The rotary clamping mechanism of the present invention has two working conditions, namely a first state and a second state. When in the first state, the clamping component mounting plate is fixed relative to the rotating positioning block, the rotary gear ring can rotate independently, and drive the rotary clamping block to slide radially relative to the clamping component mounting plate, thereby achieving clamping or loosening. In the second state, the clamping component mounting plate and the rotary gear ring are fixed relative to each other by a suction cup electromagnet, the rotary gear ring can drive the clamping component mounting plate to rotate together, and then the rotary clamping block carries the tube to rotate. The rotary gear ring with a planar cam connecting rod and a disc-shaped rotary gear ring and the closely related clamping component mounting plate and rotary clamping block are used in conjunction with an electromagnetic clutch containing a suction cup electromagnet to control the engagement state of the clamping component mounting plate and the rotary gear ring, thereby realizing the joint control of the clamping and rotation of the product by the mechanism, and the structure is simple.

[0021] (6) The present invention uses a rotating clamping mechanism to clamp pipes of different radii. The rotating clamping mechanism includes six rotating clamping blocks. The rotating clamping mounting blocks are slidably mounted on the clamping assembly mounting plate. The rotating clamping mounting blocks drive the six rotating clamping blocks to move along the radial direction of the pipe to clamp the pipe. The clamping mechanism can continuously adjust the clamping space according to the actual changes in the radius of the pipe, and has strong adaptability.

[0022] (7) In order to avoid the hard damage to the cutting tool caused by the large difference in product flatness or poor product concentricity during the turning process in the prior art, the present invention also provides a rotating clamping mechanism that can control the maximum rotational torque. The rotating gear ring and the clamping component mounting plate are in close contact, and the rotating gear ring and the clamping component mounting plate transmit the rotational torque through friction to avoid rigid damage during the turning process.

[0023] (8) The present invention also provides a suction cup electromagnet that can be slidably shuttled inside the through hole of the electromagnet and cooperates with the rotating gear ring. The friction between the rotating gear ring and the clamping component mounting plate can be adjusted by sliding the suction cup electromagnet. After the machining process such as turning is completed, the rotation torque can be adjusted by driving the suction cup electromagnet. Attached Figure Description

[0024] Figure 1 This is an overall structural diagram of the welding workstation for the inner liner of a pressure vessel.

[0025] Figure 2 The structural diagram of the pressure vessel inner liner welding workstation conceals the outer shell;

[0026] Figure 3 This is a structural diagram of the infrared heating module;

[0027] Figure 4 for Figure 3 Enlarged view of a portion of point A in the middle;

[0028] Figure 5 This is a diagram showing the overall structure of the cutting module;

[0029] Figure 6 for Figure 5 Enlarged view of a section at point B in the middle;

[0030] Figure 7 This is a diagram of the overall structure of the cutting module from another perspective;

[0031] Figure 8 for Figure 7 Enlarged view of a section at point C;

[0032] Figure 9 The structural diagram after the mounting frame is hidden for the cutting module;

[0033] Figure 10 The structural diagram of the cutting module after the mounting frame is hidden from another perspective;

[0034] Figure 11 The structural diagram behind the moving tool holder is hidden for the cutting module;

[0035] Figure 12 This is a structural diagram of the drive unit of the cutting module;

[0036] Figure 13 The structural diagram shows the cutting module with a hidden sliding track.

[0037] Figure 14 for Figure 13 Enlarged view of a section at point D;

[0038] Figure 15 This is an overall view of the rotary clamping mechanism;

[0039] Figure 16 This is a front view of the rotary clamping mechanism;

[0040] Figure 17 Rear view of the rotating clamping mechanism;

[0041] Figure 18 A partial magnification of the rotating clamping mechanism after removing some of its structure. Figure 1 ;

[0042] Figure 19A partial magnification of the rotating clamping mechanism after removing some of its structure. Figure 2 ;

[0043] Figure 20 A partial magnification of the rotating clamping mechanism after removing some of its structure. Figure 3 ;

[0044] Figure 21 A partial magnification of the rotating clamping mechanism after removing some of its structure. Figure 4 ;

[0045] Figure 22 This is a schematic diagram of the rotating gear ring.

[0046] Figure 23 Enlarged view of the rotary clamping assembly Figure 1 ;

[0047] Figure 24 Enlarged view of the rotary clamping assembly Figure 2 ;

[0048] Figure 25 Enlarged view of the rotary clamping assembly Figure 3 ;

[0049] Figure 26 This is a schematic diagram of the rotating positioning block. Detailed Implementation

[0050] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0051] It should be noted that the terms "upper," "lower," "inner," "outer," and "middle," etc., used in the specification, claims, and accompanying drawings of this invention indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are primarily for the purpose of better describing the invention and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this invention according to the specific circumstances. In addition, the term "multiple" should mean two or more.

[0052] like Figure 1-26 As shown, this embodiment provides a pressure vessel liner welding workstation, including an equipment frame 5000 and a clamping device 1000 and a welding assembly 3000 mounted on the equipment frame 5000. The clamping device 1000 is used to fix the fittings to be welded, and the welding assembly 3000 is disposed on one side of the fittings to be welded to weld the weld seams of adjacent fittings.

[0053] It should be noted that the pressure vessel liner welding workstation of this embodiment is particularly suitable for welding plastic liner materials. Specifically, the fittings to be welded include a plastic pipe 2000 and its two closed ends 2100. The welding assembly 3000 welds the weld seam between the pipe 2000 and its adjacent closed ends. In other words, the clamping device 1000 includes a clamping assembly 1100 for clamping the closed ends 2100 and a rotating clamping mechanism 1200 for clamping the pipe 2000.

[0054] Understandably, traditional plastic pipe welding equipment uses hot plate heating, which can cause material sticking and stringing when the hot plate is pulled out, affecting the welding quality.

[0055] Therefore, the pressure vessel liner welding workstation of this embodiment adopts a non-contact infrared heating process to ensure that the product does not stick or produce wires. In other words, the welding component 3000 is an infrared heating welding integrated module 3000. The weld seams of adjacent pipes 2000 and closed ends 2100 can be rapidly condensed under the action of infrared rays, and after pressing and cooling, they are bonded together, achieving extremely high welding strength without producing phenomena such as sticking or wires.

[0056] Furthermore, both the clamping assembly 1100 and the rotating clamping mechanism 1200 can rotate their respective clamped objects around their own axes. Thus, the clamping assembly 1100 and the rotating clamping mechanism 1200 respectively clamp the closed end 2100 and the pipe 2000, aligning them. The infrared heating welding integrated module 3000 is then activated to heat the weld between the two. The clamping assembly 1100 and the rotating clamping mechanism 1200 drive the closed end 2100 and the pipe 2000 to rotate synchronously. Under the action of infrared rays, the weld can rapidly solidify, and after pressing and cooling, they are bonded together, achieving extremely high welding strength without producing phenomena such as material sticking or wire drawing.

[0057] Specifically, the equipment frame 5000 is provided with a first slide rail 5100, and the bottom of each clamping assembly 1100 is provided with a bottom slide (not shown) that matches the first slide rail 5100. The equipment frame 5000 is also provided with a first screw and nut mechanism 5200 that drives the clamping assembly 1100 to move axially along the pipe 2000, thereby causing the closed end 2100 and the pipe 2000 to be pressed together. Preferably, in order to further improve the stability of the movement of the clamping assembly 1100, the equipment frame 5000 is also provided with a gantry slide rail 5300, and the top of each clamping assembly 1100 is provided with a top slide 1300 that matches the gantry slide rail 5300.

[0058] In this embodiment, a second slide rail 5400 is provided on the equipment frame 5000, and a base slider 3002 matching the second slide rail 5400 is provided at the bottom of each infrared heating welding integrated module 3000. A second lead screw and nut mechanism 5500 is also provided on the equipment frame 5000 to drive the infrared heating welding integrated module 3000 to move axially along the pipe 2000. Thus, the position of the infrared heating welding integrated module 3000 can be adjusted according to the actual situation of different models of inner liner to match the position of the weld.

[0059] The infrared heating welding integrated module 3000 in this embodiment includes a device base 3001 and an infrared heating welding mold 3300 and a cutting module 3400 slidably mounted on the upper end of the device base 3001. The sliding direction of the infrared heating welding mold 3300 and the cutting module 3400 is perpendicular to the axial direction of the pipe 2000. The bottom of the device base 3001 is provided with a base slider 3002 that matches the second slide rail 5400, and the sliding direction of the device base 3001 is parallel to the axial direction of the pipe 2000.

[0060] It is worth noting that the infrared heating welding cutting device of this embodiment integrates the infrared heating welding mold 3300 and the cutting module 3400. It has a simple structure, realizes multiple functions, and is conducive to simplifying the overall structure of the welding workstation 100 and making full use of space.

[0061] In other words, the infrared heating welding mold 3300 and the cutting module 3400 installed on the device base 3001 can slide along the axial direction of the pipe 2000 with the device base 3001 to match the position of the weld seam of the pipe 2000; the infrared heating welding mold 3300 slides back and forth in a direction perpendicular to the axial direction of the pipe 2000, thereby causing the infrared heating welding mold 3300 to slide toward or away from the pipe 2000, so as to adjust the heating distance of the infrared heating welding mold 3300 to the pipe 2000, and to facilitate the rapid removal of the infrared heating welding mold 3300 after the weld seam is heated; the cutting module 3400 slides back and forth in a direction perpendicular to the axial direction of the pipe 2000, thereby causing the infrared heating welding mold 3300 to slide toward or away from the pipe 2000, so as to adjust the cutting distance of the cutting module 3400 to the pipe 2000.

[0062] Specifically, a first base slider 3003 and a second base slider 3004 are fixedly installed above the device base 3001. The infrared heating welding mold 3300 is detachably installed on the infrared heating module mounting plate 3100 via a quick-change tooling 3200. The lower end of the infrared heating module mounting plate 3100 is equipped with a first slide rail 3110 that matches the first base slider 3003, so that the infrared heating welding mold 3300 can slide back and forth in a direction perpendicular to the axial direction of the pipe 2000. The cutting module 3400 is disposed on the upper end surface of the cutting module mounting plate 3410, and the lower end of the cutting module mounting plate 3410 is equipped with a second slide rail 3411 that matches the second base slider 3004, so that the cutting module 3400 can slide back and forth in a direction perpendicular to the axial direction of the pipe 2000.

[0063] It is worth noting that, in order to improve welding quality, the welding workstation 100 of this embodiment performs leveling on both sides of the weld 2000 before welding, and cutting and grinding on the weld after welding. Among them, the cutting module 3400 integrates the three functions of leveling, cutting and grinding, with a simple structure, realizing the multi-functionality of the cutting module 3400, which further facilitates the simplification of the overall structure of the welding workstation 100 and the full utilization of space.

[0064] The cutting module 3400 of this embodiment includes a mounting frame 3420 disposed on the cutting module mounting plate 3410 and a blade assembly 3430 mounted above the mounting frame 3420, so as to perform pre-welding leveling and post-welding cutting on the pipe 2000 by means of the blade assembly 3430; the cutting module 3400 also includes a grinding assembly 3440 mounted in the mounting frame 3420, so as to perform post-cutting grinding on the pipe 2000 by means of the grinding assembly 3440.

[0065] The tool assembly 3430 includes a fixed tool 3431 and a movable tool 3432. The sliding direction of the movable tool 3432 is perpendicular to the axial direction of the pipe 2000. Thus, when the movable tool 3432 and the fixed tool 3431 are flush with the pipe 2000, the fixed tool 3431 and the movable tool 3432 respectively level the pipe 2000 on both sides of the weld. When the movable tool 3432 protrudes from the fixed tool 3431 relative to the pipe 2000, the movable tool 3432 cuts the weld alone.

[0066] The mounting frame 3420 of this embodiment includes a pair of side plates 3421 spaced apart on the upper surface of the cutting module mounting plate 3410. A front plate 3422 is provided at the front end of the pair of side plates 3421, and the front plate 3422 has a through opening 3423 so that the grinding wheel belt 3441 in the grinding assembly 3440 inside the mounting frame 3420 passes through the through opening 3423 and can act on the pipe 2000. A top plate 3424 is provided at the upper end of the pair of side plates 3421, and a fixed blade 3431 and a movable blade 3432 are mounted on the upper surface of the top plate 3424.

[0067] Specifically, a fixed blade holder 3433 is fixedly mounted on the upper surface of the top plate 3424, and a fixed blade 3431 is fixedly mounted on the fixed blade holder 3433. A movable blade holder 3434 is also slidably mounted on the upper surface of the top plate 3424, and a movable blade 3432 is fixedly mounted on the movable blade holder 3434, allowing the movable blade 3432 to slide relative to the top plate 3424. Preferably, a sliding rail 3435 is fixedly provided on the inner side of the movable blade holder 3434, and the sliding rail 3435 is also slidably disposed on the upper surface of the top plate 3424. Fixed rails 3427 matching the sliding rail 3435 are fixedly provided on both sides of the top plate 3424. Thus, the drive assembly acts on the movable blade holder 3434 to drive the movable blade 3432 to slide back and forth.

[0068] The grinding assembly 3440 of this embodiment includes a base vertical plate 3442 disposed within a mounting frame 3420, serving as the mounting base for the grinding assembly 3440. A grinding wheel belt 3441 and various grinding wheels are mounted on the base vertical plate 3442. Specifically, a drive wheel 3443 and a driven wheel 3444 are rotatably disposed on one side of the base vertical plate 3442, and the grinding wheel belt 3441 is arranged around the outside of the drive wheel 3443 and the driven wheel 3444. Thus, the grinding power unit 3450 drives the drive wheel 3443 to rotate, thereby driving the grinding wheel belt 3441 to move, thereby grinding the weld seam.

[0069] As the power input for the grinding assembly 3440, the grinding power unit 3450 includes a grinding motor 3451 disposed on the other side of the base vertical plate 3442. A bearing seat 3452 is fixedly disposed inside the base vertical plate 3442. A rotating shaft 3453 is rotatably mounted inside the bearing seat 3452 and extends out from both sides of the base vertical plate 3442. A drive wheel 3443 is fixedly mounted on one end of the rotating shaft 3453, and a driven gear 3454 is fixedly mounted on the other end of the rotating shaft 3453. A drive gear 3455 is fixedly disposed at the output end of the grinding motor 3451, and the drive gear 3455 and the driven gear 3454 are meshed together.

[0070] As a preferred embodiment of the grinding assembly 3440, a tensioning mechanism 3460 is also provided on one side of the base vertical plate 3442 to enhance the tension of the grinding wheel belt 3441. Specifically, the tensioning mechanism 3460 includes a swing arm 3461 rotatably mounted on one side of the base vertical plate 3442, and a tensioning wheel 3463 is provided at one end of the swing arm 3461 away from its swing point 3462. The grinding wheel belt 3441 is arranged around the outside of the driving wheel 3443, the driven wheel 3444, and the tensioning wheel 3463. It is understood that a tension spring (not shown) is provided between the base vertical plate 3442 and the swing arm 3461.

[0071] In this embodiment, the grinding assembly 3440 can move back and forth relative to the mounting frame 3420. When the grinding assembly 3440 needs to work, the grinding wheel belt 3441 in the grinding assembly 3440 inside the mounting frame 3420 passes through the through port 3423 and acts on the pipe 2000. When the grinding assembly 3440 does not need to work, the grinding wheel belt 3441 in the grinding assembly 3440 retracts into the mounting frame 3420.

[0072] The forward and backward movement of the movable blade 3432 and the grinding assembly 3440 is driven by a drive unit 3470 with only one power source. The movable blade 3432 and the grinding assembly 3440 move in opposite directions, meaning that one of them operates in the front while the other waits in the rear. The drive structure for the forward and backward movement of the movable blade 3432 and the grinding assembly 3440 is simple, requiring only one power source to drive both, thus saving energy.

[0073] Specifically, a vertical plate 3425 is fixedly installed inside the mounting frame 3420, and several slide rails 3426 are fixedly provided on the side of the vertical plate 3425. Several sliders 3445 that match the slide rails 3426 are fixedly provided on the side of the base vertical plate 3442, so that the base vertical plate 3442 can slide back and forth inside the mounting frame 3420, thereby allowing the grinding assembly 3440 installed on the base vertical plate 3442 to slide back and forth inside the mounting frame 3420.

[0074] In other words, the vertical fixed plate 3425 is fixedly installed on the upper surface of the cutting module mounting plate 3410. The vertical fixed plate 3425 is located between a pair of side upright plates 3421 and is arranged parallel to the side upright plates 3421. The mounting base of the grinding assembly 3440 has a base vertical plate 3442 that slides on the side of the vertical fixed plate 3425. Thus, the grinding assembly 3440 as a whole can move relatively back and forth.

[0075] In this embodiment, the single power source of the drive unit 3470 is the cylinder 3471. That is, the planar cam plate 3472 driven by the cylinder 3471 moves up and down relative to each other, thereby driving the movable blade 3432 and the grinding assembly 3440 to move back and forth in opposite directions.

[0076] Specifically, the planar cam plate 3472 has a slanted groove 3473, and a drive shaft (not shown) is movably arranged in the slanted groove 3473. The top plate 3424 has an elongated hole 3436, through which the planar cam plate 3472 passes. The length of the elongated hole 3436 is greater than the width of the planar cam plate 3472 so that the top plate 3424 will not interfere with the forward and backward movement of the planar cam plate 3472. A circular hole 3437 is provided on the side of the elongated hole 3436, and the end of the drive shaft is fixedly arranged inside the circular hole 3437.

[0077] Therefore, when the planar cam plate 3472 driven by the cylinder 3471 moves up and down relative to each other, the relatively fixed drive shaft cooperates with the inclined groove 3473, so that the planar cam plate 3472 moves up and down relative to each other while moving back and forth, so that the moving tool holder 3434, which is relatively fixed to the planar cam plate 3472 in the back and forth direction, moves back and forth with the planar cam plate 3472, thereby driving the moving tool 3432 to slide back and forth.

[0078] Understandably, the cylinder 3471 mounted on the movable tool holder 3434 also moves back and forth with the movable tool holder 3434. Preferably, a vertical slide groove 3438 is fixedly mounted on the upper end of the movable tool holder 3434, and the upper end of the flat cam plate 3472 is vertically slidably mounted within the vertical slide groove 3438. Thus, the cylinder 3471 can drive the flat cam plate 3472 to move up and down relative to each other, and the back and forth movement of the flat cam plate 3472 is transmitted to the movable tool holder 3434 through the vertical slide groove 3438.

[0079] The drive unit 3470 also includes a connecting rod 3474, and a straight groove 3475 is provided on the planar cam plate 3472. One end of the connecting rod 3474 is disposed in the straight groove 3475, and the other end of the connecting rod 3474 is connected to the base vertical plate 3442. Thus, when the planar cam plate 3472 driven by the cylinder 3471 moves up and down and back and forth relative to each other, the straight groove 3475 drives the base vertical plate 3442 to move laterally through the connecting rod 3474, so that the base vertical plate 3442 drives the grinding assembly 3440 to slide back and forth. Preferably, a vertical guide groove 3446 is installed at the lower end of the base vertical plate 3442, and the other end of the connecting rod 3474 is installed in the vertical guide groove 3446 through a pin.

[0080] It should be noted that the cylinder 3471 drives the planar cam plate 3472 to move up and down relative to each other, causing the connecting rod 3474 to swing under the drive of the straight groove 3475 to extend or retract the base vertical plate 3442; at the same time, the drive shaft acts on the inclined groove 3473, causing the planar cam plate 3472 to move back and forth, driving the movable tool holder 3434 and its movable tool 3432 to move in the opposite direction to the base vertical plate 3442. Thus, one of the movable tool 3432 and the grinding assembly 3440 performs work in the front while the other waits in the rear position.

[0081] In this embodiment, a waste chip collection trough 3480 is also provided at the front end of the mounting frame 3420, and a chip discharge pipe 3481 is fixedly provided at the upper end of the cutting module mounting plate 3410, with the inlet end 3482 of the chip discharge pipe 3481 connected to the waste chip collection trough 3480. Thus, waste chips falling from the pipe 2000 during the operation of the cutting module 3400 are promptly discharged.

[0082] The clamping mechanism in the existing technology uses a manual locking method to clamp the pipe through a semi-circular clamping structure. After clamping the product, the product cannot rotate, which reduces the working efficiency of the existing clamping components for welding the inner liner of pressure vessels. At the same time, it is difficult to adapt to pipes of different radius sizes and cannot be rotated in conjunction with automatic welding, which reduces the welding quality. This leads to welding defects such as weld deviation, unevenness, and incomplete penetration during the welding process.

[0083] To address the aforementioned problems in the prior art, the rotary clamping mechanism 1200 of this embodiment is further provided with a rotary clamping mechanism body 1220 for clamping pipes 2000 of different radii. The rotary clamping mechanism body 1220 includes a clamping mechanism housing 1121, a drive structure 1240, and a rotary clamping assembly 1250. The rotary clamping assembly 1250 is disposed within the clamping mechanism housing 1121 and is directly used to fix and clamp the pipes 2000.

[0084] The rotary clamping assembly 1250 includes a sheet metal mounting plate 1251, a rotary bearing 1252, a rotary gear ring 1253, and a clamping assembly mounting plate 1254, which are sequentially arranged within the clamping mechanism housing 1121. The clamping assembly mounting plate 1254 is provided with a plurality of rotary clamping blocks 1255, each of which has an arc-shaped end 1257 on one side. The arc-shaped end faces of the plurality of rotary clamping blocks 1255 together form a clamping space 1256, which is a cylindrical cavity with a cross-sectional radius equal to the radius of the pipe 2000. The driving structure 1240 drives the rotary gear ring 1253 to rotate by rotating a drive pulley 1242 and a belt 1241. The belt 1241 is a synchronous toothed belt and surrounds the outer ring of the rotary gear ring 1253.

[0085] Understandably, this embodiment includes a cutting module 3400 for leveling, cutting, and grinding the weld seam. However, during the turning process, in order to avoid hard damage to the cutting tool due to excessive differences in product flatness or poor product concentricity, it is essential to use a rotary clamping mechanism that can control the maximum rotational torque, rather than manually locking the pipe 2000 by mechanical clamping with bolts or other means.

[0086] Based on this, this embodiment provides a rotary clamping mechanism 1200 with controllable clamping torque. Specifically, the rotary gear ring 1253 is in close contact with the clamping component mounting plate 1254, and the rotary torque is transmitted between the rotary gear ring 1253 and the clamping component mounting plate 1254 through friction. By adjusting the friction between the rotary gear ring 1253 and the clamping component mounting plate 1254, rotary clamping with controllable clamping torque can be achieved. The rotary clamping mechanism 1200 with controllable clamping torque can clamp the pipe 2000 with a controllable maximum rotational torque when the cutting module 3400 is working, avoiding hard damage to the cutting module 3400 during operation.

[0087] Those skilled in the art will know that the friction between the rotating gear ring 1253 and the clamping assembly mounting plate 1254 can be adjusted by adjusting the tightness of the mounting between the rotating gear ring 1253 and the clamping assembly mounting plate 1254 or by specifically selecting the material between the friction mounting surfaces.

[0088] Furthermore, an electromagnet mounting plate 1281 and a suction cup electromagnet 1282 mounted on the electromagnet mounting plate 1281 are provided on the clamping assembly mounting plate 1254. An electromagnet cover 1284 is provided on the outside of the electromagnet mounting plate 1281 and the suction cup electromagnet 1282. An electromagnet through hole 1283 is provided on the clamping assembly mounting plate 1254 for the suction cup electromagnet 1282 to pass through. The suction cup electromagnet 1282 can slide through the electromagnet through hole 1283 and contact the rotating gear ring 1253 to cooperate. The sliding arrangement of the suction cup electromagnet 1282 can adjust the relationship between the rotating gear ring 1253 and the clamping assembly mounting plate 1281. The friction between 54; it can be understood that when the engagement between the suction cup electromagnet 1282 and the rotating gear ring 1253 is a mechanical plug-in engagement, the rotating gear ring 1253 and the clamping component mounting plate 1254 are relatively fixed, which can be understood as the friction between the rotating gear ring 1253 and the clamping component mounting plate 1254 being infinitely large. When the engagement between the suction cup electromagnet 1282 and the rotating gear ring 1253 is a contact friction engagement, the friction between the rotating gear ring 1253 and the clamping component mounting plate 1254 is equivalent to adding the friction between the suction cup electromagnet 1282 and the rotating gear ring 1253 to the original friction.

[0089] In this embodiment, the rotary clamping assembly 1250 further includes a rotary positioning block 1260. The rotary positioning block 1260 is fixedly disposed inside the clamping mechanism housing 1121 by a positioning plate 1261. The rotary positioning block 1260 also includes a drive motor 1262 fixedly disposed on the positioning plate 1261. The output end of the drive motor 1262 is fixedly connected to the short side of the L-shaped positioning sliding plate 1263. The positioning insert 1264 is fixedly disposed on the L-shaped positioning sliding plate 1263 and protrudes from the bottom end of the L-shaped positioning sliding plate 1263.

[0090] Preferably, the positioning plug 1264 is disposed at a corresponding position on the periphery of the clamping component mounting plate 1254, and the clamping component mounting plate 1254 is provided with a socket for engaging with the positioning plug 1264. After the positioning plug 1264 is inserted into the socket, the clamping component mounting plate 1254 can be stopped from rotating with the rotating gear ring 1253, thereby achieving the effect of rotational clutch in conjunction with the transmission of rotational torque.

[0091] In this embodiment, each of the rotary clamping blocks 1255 can move along the radial direction of the pipe 2000 on the clamping assembly mounting plate 1254 to adjust the inner diameter of the cylindrical cavity of the clamping space 1156 to be equal to the radius of the pipe 2000. Multiple slidably arranged rotary clamping blocks 1255 are joined together to form a cylindrical cavity to clamp the pipe 2000. When the radius of the welded pipe 2000 is too large, the gap between the arc-shaped ends 1257 of the multiple rotary clamping blocks 1255 can be adjusted to expand the inner diameter of the clamping space 1256 formed by the multiple arc-shaped ends 1257, thereby allowing the rotary clamping assembly 1250 of this application to adapt to pipes 2000 with different radii.

[0092] Preferably, there are six rotating clamping blocks 1255, which are evenly distributed on the clamping assembly mounting plate 1254. Each rotating clamping block 1255 includes a rotating clamping mounting block 1256 and a rotating clamping fixing block 1257. The rotating clamping fixing block 1257 is fixedly disposed on the rotating clamping mounting block 1256, and the rotating clamping mounting block 1256 is slidably disposed on the clamping assembly mounting plate 1254. The rotating clamping mounting block 1256 drives the rotating clamping fixing block 1257 to move radially along the pipe 2000.

[0093] Furthermore, to facilitate the radial movement of the rotary clamping block 1255 and to enable the rotary clamping block 1255 to clamp the pipe 2000 with a controllable torque, this application also provides a corresponding clamping drive structure 1270; the clamping drive structure 1270 includes a clamping follower mounting base 1271 fixedly mounted on the rotary clamping mounting block 1256 and a movable clamping follower body 1272 fixedly mounted on the clamping follower mounting base 1271, and the rotary gear ring 1253 has an inclined follower. The clamping follower body 1272 is slidably disposed in the sliding groove 1273. By moving the clamping follower body 1272 in the sliding groove 1273, the radial distance of the clamping follower body 1272 relative to the axis of the rotating gear ring 1253 can be changed. Thus, by rotating the rotating gear ring 1253 at a specific angle, the rotating clamping mounting block 1256 is driven to move a distance radially along the pipe 2000, thereby making the clamping torque of the rotating clamping block 1255 controllable.

[0094] Therefore, in this embodiment, the rotary clamping mechanism has two working states, namely a first state and a second state. When the rotary clamping mechanism is in the first state, the clamping component mounting plate 1254 is relatively fixed by the rotary positioning block 1260, and the rotary gear ring 1253 can rotate independently, driving the rotary clamping block 1255 to slide radially relative to the clamping component mounting plate 1254, thereby achieving clamping or loosening. In the second state, the clamping component mounting plate 1254 and the rotary gear ring 1253 are relatively fixed by the suction cup electromagnet 1282, and the rotary gear ring 1253 can drive the clamping component mounting plate 1254 to rotate together, thereby rotating the pipe 2000 by the rotary clamping block 1255.

[0095] Furthermore, a position sensor 1231 is also provided on the clamping mechanism housing 1121. The position sensor 1231 is located on the clamping mechanism housing 1121 at a position corresponding to the rotary clamping mounting block 1256. The position sensor 1231 is located on the outer side of the rotary clamping mounting block 1256 on the side away from the pipe 2000. The position sensor 1231 can measure the position of each rotary clamping mounting block 1256 when the rotary clamping mounting block 1256 rotates with the clamping assembly mounting plate 1254. By measuring the position of each rotary clamping mounting block 1256, the roundness and offset detection of different batches of products can be determined and compared, which helps to achieve accurate positioning.

[0096] The rotary clamping mechanism 1200 for pipe welding in this embodiment includes a slide mounting plate 1210 mounted on the frame 5000 of the inner liner welding equipment, a rotary clamping mechanism body 1220 mounted on the slide mounting plate 1210, and an upper mounting structure 1230 mounted on the top of the rotary clamping mechanism body 1220. By providing the slide mounting plate 1210 and the upper mounting structure 1230 at the upper and lower ends of the rotary clamping mechanism body 1220, the rotary clamping mechanism body 1220 can be moved and adjusted in position on the tubular mechanical welding device 100. The rotary clamping mechanism body 1220 is fixedly mounted on the slide mounting plate 1210 by a clamping mechanism base 1221.

[0097] Furthermore, the main body 1220 of the rotary clamping mechanism includes a clamping mechanism housing 1121, a drive structure 1240, and a rotary clamping assembly 1250. The clamping mechanism housing 1121 is fixedly mounted on the slide mounting plate 1210 via the clamping mechanism base 1221. The rotary clamping assembly 1250 is disposed inside the clamping mechanism housing 1121 and is directly used to fix and clamp the pipe 2000 to be welded.

[0098] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A pressure vessel liner welding workstation for welding the weld seam between a pipe and its adjacent closed end, comprising: Equipment rack; Clamping assembly, mounted on the equipment frame, is used to clamp the closed end; A rotary clamping mechanism, mounted on the equipment frame, is used to clamp pipes; Its characteristic is that it also includes an infrared heating welding integrated module, which is installed on the equipment frame and located on one side of the pipe; Among them, the clamping assembly and the rotating clamping mechanism can both enable the closed end and the pipe being clamped to rotate around their own axis. The equipment frame is equipped with a first slide rail, and the bottom of each clamping component is equipped with a bottom slide block that matches the first slide rail. The equipment frame is also equipped with a first screw and nut mechanism that drives the clamping components to move along the axial direction of the pipe. The equipment frame is equipped with a second slide rail, and the bottom of the infrared heating welding integrated module is equipped with a base slider that matches the second slide rail. The equipment frame is also equipped with a second screw nut mechanism that drives the infrared heating welding integrated module to move along the pipe axis. The infrared heating welding integrated module includes a device base and an infrared heating welding mold and a cutting module that are slidably mounted on the upper end of the device base, and the sliding direction of the infrared heating welding mold and the cutting module is perpendicular to the axial direction of the pipe. The cutting module includes a mounting frame disposed on the cutting module mounting plate and a tool assembly mounted on the mounting frame. The cutting module also includes a grinding assembly mounted in the mounting frame. The blade assembly includes a fixed blade and a movable blade, and the sliding direction of the movable blade is perpendicular to the axis of the pipe. The grinding assembly includes a base vertical plate that is slidably mounted within the mounting frame, and a grinding wheel belt mounted on the base vertical plate; The forward and backward movement of the movable blade and the grinding component is driven by a drive unit with only one power source, and the movable blade and the grinding component move in opposite directions.

2. The pressure vessel liner welding workstation according to claim 1, characterized in that, The mounting frame includes a pair of side panels spaced apart on the upper surface of the cutting module mounting plate; A front panel is provided at the front end of a pair of side panels, and the front panel has a passage opening; a top panel is provided at the upper end of the pair of side panels. Among them, a fixed blade holder is fixedly installed on the upper end face of the top plate, and the fixed blade is fixedly installed on the fixed blade holder; A movable blade holder can also be slidably mounted on the upper end surface of the top plate, and the movable blade is fixedly mounted on the movable blade holder; The inner side of the moving tool holder is fixedly provided with a sliding rail, and the sliding rail is slidably provided on the upper end surface of the top plate. Fixed rails matching the sliding rail are fixedly provided on both sides of the top plate. A vertical plate is fixedly installed inside the mounting frame, and several slide rails are fixedly installed on the side of the vertical plate. Several sliders that match the slide rails are fixedly installed on the side of the foundation vertical plate.

3. The pressure vessel liner welding workstation according to claim 1, characterized in that, One side of the foundation vertical plate is rotatably equipped with a driving wheel and a driven wheel, and the grinding wheel belt is arranged around the outside of the driving wheel and the driven wheel; A grinding motor is installed on the other side of the foundation vertical plate, and a bearing seat is fixedly installed inside the foundation vertical plate. A rotating shaft is rotatably mounted inside the bearing housing, and the rotating shaft extends out from both sides of the foundation vertical plate; The driving gear is fixedly installed at one end of the rotating shaft, and the driven gear is fixedly installed at the other end of the rotating shaft; The output end of the grinding motor is fixedly equipped with a drive gear, and the drive gear is meshed with the driven gear.

4. The pressure vessel liner welding workstation according to claim 3, characterized in that, A tensioning mechanism is also provided on one side of the foundation vertical plate; The tensioning mechanism includes a swing arm rotatably mounted on one side of the foundation vertical plate, and a tensioning wheel is provided at the end of the swing arm away from its swing point. The grinding wheel belt is arranged around the outside of the driving wheel, the driven wheel and the tensioning wheel. A tension spring is installed between the foundation vertical plate and the swing arm.

5. The pressure vessel liner welding workstation according to claim 1, characterized in that, The drive unit includes a cylinder and a planar cam plate that can move up and down relative to each other, driven by the cylinder; The planar cam plate has an inclined groove, and a drive shaft is movably installed in the inclined groove; The top plate has an elongated hole, through which a flat cam plate passes. A round hole is provided on the side of the elongated hole, and the end of the drive shaft is fixedly disposed inside the round hole. A vertical slide groove is fixedly installed at the upper end of the moving tool holder, and the upper end of the flat cam plate can be vertically slidably installed in the vertical slide groove.

6. The pressure vessel liner welding workstation according to claim 5, characterized in that, The drive unit also includes a connecting rod, and a straight groove is provided on the flat cam plate. One end of the connecting rod is located in the straight groove, and the other end of the connecting rod is connected to the foundation vertical plate.

7. The pressure vessel liner welding workstation according to claim 1, characterized in that, The front end of the mounting frame is also equipped with a chip collection trough, and the upper end of the cutting module mounting plate is also fixedly equipped with a chip removal pipe, and the inlet end of the chip removal pipe is connected to the chip collection trough.

8. The pressure vessel liner welding workstation according to claim 1, characterized in that, The rotary clamping mechanism is configured to clamp pipes of different radii. The rotary clamping mechanism body includes a clamping mechanism shell, a drive structure, and a rotary clamping assembly. The rotary clamping assembly is disposed inside the clamping mechanism shell and is directly used to fix and clamp the pipe. The rotary clamping assembly includes a sheet metal mounting plate, a rotary bearing, a rotary gear ring, and a clamping assembly mounting plate, which are sequentially arranged inside the housing of the clamping mechanism. The clamping assembly mounting plate is provided with a plurality of rotary clamping blocks, each of which has an arc-shaped end on one side. The arc-shaped end faces of the plurality of rotary clamping blocks together form a clamping space, which is a cylindrical cavity. The cross-sectional radius of the cylindrical cavity is equal to the radius of the pipe. The rotary clamping mechanism has two working states: a first state and a second state. In the first state, the clamping component mounting plate is fixed relative to the rotary positioning block, and the rotary gear ring can rotate independently, driving the rotary clamping block to slide radially along the pipe relative to the clamping component mounting plate, thereby clamping or releasing the pipe. In the second state, the clamping component mounting plate and the rotary gear ring are fixed relative to each other by a suction cup electromagnet, and the rotary gear ring can drive the clamping component mounting plate to rotate together, thereby rotating the pipe with the rotary clamping block.

9. The pressure vessel liner welding workstation according to claim 8, characterized in that, The rotary clamping mechanism is a rotary clamping mechanism that can control the clamping torque. The rotary gear ring is in close contact with the clamping component mounting plate, and the rotary torque is transmitted between the rotary gear ring and the clamping component mounting plate through friction.

10. The pressure vessel liner welding workstation according to claim 8, characterized in that, An electromagnet mounting plate and a suction cup electromagnet mounted on the electromagnet mounting plate are provided on the clamping assembly mounting plate. An electromagnet cover is provided on the outside of the electromagnet mounting plate and the suction cup electromagnet. An electromagnet through hole is provided on the clamping assembly mounting plate for the suction cup electromagnet to pass through. The suction cup electromagnet can slide through the electromagnet through hole and contact the rotating gear ring to achieve cooperation.

11. The pressure vessel liner welding workstation according to claim 9 or 10, characterized in that, The rotary clamping assembly also includes a rotary positioning block, which is fixedly disposed inside the housing of the clamping mechanism by a positioning plate.

12. The pressure vessel liner welding workstation according to claim 11, characterized in that, The rotary positioning block also includes a drive motor fixedly mounted on the positioning plate. The output end of the drive motor is fixedly connected to the short side of the L-shaped positioning sliding plate. The positioning insert is fixedly mounted on the L-shaped positioning sliding plate and protrudes from the bottom end of the L-shaped positioning sliding plate.

13. The pressure vessel liner welding workstation according to claim 8, characterized in that, Each of the rotating clamping blocks can move along the radial direction of the pipe on the clamping assembly mounting plate to adjust the inner diameter of the cylindrical structure cavity of the clamping space to be equal to the radius of the pipe.

14. The pressure vessel liner welding workstation according to claim 13, characterized in that, The number of rotating clamping blocks is six, and the six rotating clamping blocks are evenly distributed on the clamping assembly mounting plate. Each rotating clamping block includes a rotating clamping mounting block and a rotating clamping fixing block.

15. The pressure vessel liner welding workstation according to claim 14, characterized in that, The rotary clamping fixing block is fixedly mounted on the rotary clamping mounting block, and the rotary clamping mounting block is slidably mounted on the clamping assembly mounting plate. The rotary clamping mounting block drives the rotary clamping fixing block to move along the radial direction of the pipe.

16. The pressure vessel liner welding workstation according to claim 15, characterized in that, The rotary clamping mechanism further includes a clamping drive structure; the clamping drive structure includes a clamping follower mounting seat fixedly disposed on the rotary clamping mounting block and a retractable clamping follower body fixedly disposed on the clamping follower mounting seat.

17. The pressure vessel liner welding workstation according to claim 16, characterized in that, The rotating gear ring has an inclined follower groove, and the clamping follower body is slidably disposed in the follower groove. By moving the clamping follower body in the follower groove, the radial distance of the clamping follower body relative to the axis of the rotating gear ring can be changed.

18. The pressure vessel liner welding workstation according to claim 14, characterized in that, The clamping mechanism housing is also provided with a position sensor, which is located on the clamping mechanism housing at a position corresponding to the rotary clamping mounting block. The position sensor is located on the outer side of the rotary clamping mounting block on the side away from the pipe.

19. The pressure vessel liner welding workstation according to claim 9 or 10, characterized in that, The rotary clamping mechanism for pipe welding also includes a slide mounting plate mounted on the frame of the inner liner welding equipment, a rotary clamping mechanism body mounted on the slide mounting plate, and an upper mounting structure mounted on the top of the rotary clamping mechanism body. The rotary clamping mechanism body is fixedly mounted on the slide mounting plate by a clamping mechanism base.

20. The pressure vessel liner welding workstation according to claim 12, characterized in that, The positioning plug is located at a corresponding position on the periphery of the clamping component mounting plate, and the clamping component mounting plate is provided with a socket for the positioning plug to be inserted into.

21. The pressure vessel liner welding workstation according to claim 9 or 10, characterized in that, The drive structure drives the rotating gear ring to rotate by driving pulleys and belts. The belt is a synchronous toothed belt and surrounds the outer ring of the rotating gear ring.

22. The pressure vessel liner welding workstation according to claim 20, characterized in that, After the positioning plug is inserted into the socket, it can stop the clamping component mounting plate from rotating with the rotating gear ring.

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