Pipeline prefabrication welding device

Abstract

The invention discloses a pipeline prefabrication welding device, and relates to the technical field of nuclear power pipeline welding, the pipeline prefabrication welding device comprises a first supporting mechanism and a second supporting mechanism, and the first supporting mechanism and the second supporting mechanism are arranged at an interval; the first supporting mechanism is provided with a first supporting wheel set, a first lifting device, a pressing wheel set and a driving device, the pressing wheel set is arranged above the first supporting wheel set, and the first lifting device is used for adjusting the height of the pressing wheel set; the driving device is connected with the first supporting wheel set and used for driving the pipeline between the first supporting wheel set and the pressing wheel set to rotate. The driving device is provided with a pedal switch, the pedal switch is of a treading type structure, the pedal switch is electrically connected with the driving device through a wire, and the pedal switch is arranged at the welding seam position; the second supporting mechanism is provided with a second lifting device, and the second lifting device is provided with a second supporting wheel set. The pipeline prefabrication welding device has the advantages of being simple in structure, light in weight, small in occupied area and easy to operate.

Description

Technical Field

[0001] This invention relates to the field of nuclear power pipeline welding technology, and more specifically to a pipeline prefabrication welding device. Background Technology

[0002] Currently, nuclear power plants under construction have hundreds of thousands of welded seams in the piping of a single unit. Welding all of these on-site presents numerous challenges. Limited space and difficulty in effectively controlling temperature and humidity make it difficult to maintain weld pass rates and significantly improve weld quality. Poor weld quality directly impacts the lifespan of the piping and increases the frequency of inspections and maintenance during later operation.

[0003] To ensure a high first-pass yield rate and improve work efficiency, the construction unit meticulously divided the system during the initial construction phase, effectively assessing the openings in the on-site rooms. This led to the development of a prefabrication list for the workshop welds, aiming to maximize the number of prefabricated welds for each system building. The workshop possesses numerous favorable factors for welding, such as easily controllable temperature and humidity, open visibility, and unobstructed welding positions. These factors mitigate the adverse effects of unfavorable environments on weld quality, improving the first-pass yield rate and avoiding the negative impact on pipeline quality caused by repetitive rework.

[0004] Furthermore, the skill level of welding operators has a direct impact on weld quality. Due to human factors, when facing high-intensity and high-quality welding tasks on site, relevant test data shows that the pass rate of welding the same type of weld in the same position is often higher than that of welding in all positions, especially in flat welding, where the pass rate is even higher and the quality is easier to guarantee.

[0005] In today's era of widespread automation, semi-automation technology has become quite mature for tasks in prefabricated welds in workshops that cannot be completed through fully automated welding. However, existing fully or semi-automated pipe prefabrication welding equipment suffers from problems such as complex structure, large size, and heavy weight. Summary of the Invention

[0006] In view of this, the present invention provides a pipe prefabrication welding device to solve the problems of existing fully automatic or semi-automatic pipe prefabrication welding devices having complex structures, large size and weight.

[0007] This invention provides a pipe prefabrication welding device, comprising: a first support mechanism and a second support mechanism, wherein the first support mechanism and the second support mechanism are arranged at intervals;

[0008] The first support mechanism has a first support wheel assembly, a first lifting device, a pressing wheel assembly, and a drive device. The pressing wheel assembly is positioned above the first support wheel assembly, and the first lifting device is used to adjust the height of the pressing wheel assembly. The drive device is connected to the first support wheel assembly and is used to drive the pipe between the first support wheel assembly and the pressing wheel assembly to rotate. The drive device has a foot switch, which is a step-operated structure. The foot switch is electrically connected to the drive device via a wire, and the foot switch is located at the weld seam. The second support mechanism has a second lifting device, and the second lifting device is equipped with a second support wheel set.

[0009] Optionally, the drive device includes a motor and a programmable logic controller (PLC), wherein the PLC is electrically connected to the motor and the foot switch, respectively.

[0010] Optionally, a drive wheel is connected to the drive shaft of the motor, and the drive wheel is connected to the first support wheel assembly via a transmission belt.

[0011] Optionally, the first support wheel assembly includes two drive shafts arranged in parallel and spaced apart, with the two ends of the two drive shafts respectively connected to the first support wheel, and at least one of the drive shafts is connected to the drive device.

[0012] Optionally, at least one of the drive shafts is connected to a sliding device, which is used to adjust the distance between the two drive shafts.

[0013] Optionally, the sliding device includes at least two parallel and spaced slide rails, a slider is slidably connected to the slide rails, the drive shaft is rotatably mounted on the slider, and a locking structure is provided between the slider and the slide rails.

[0014] Optionally, the first lifting device includes a guide member, a sliding member, and a locking device. The guide member extends vertically, the sliding member is slidably disposed on the guide member, and the locking device is disposed on the sliding member for locking the sliding member.

[0015] Optionally, a crossbeam is connected to the sliding member, the crossbeam has a transverse guide structure, and the pressure wheel assembly is connected to the transverse guide structure.

[0016] Optionally, the clamping wheel assembly includes a clamping wheel frame, which has two parallel and spaced connecting rods. The two ends of the two connecting rods are respectively connected to clamping wheels. A vertical threaded rod is connected to the clamping wheel frame and is connected to the transverse guide structure through the vertical threaded rod.

[0017] Optionally, the second lifting device includes a vertical lead screw, which is threadedly connected to the support frame of the second support mechanism. The top end of the vertical lead screw is rotatably connected to a second support wheel assembly, and the bottom end has an operating rotation device.

[0018] Beneficial effects The technical solution of this invention has the following advantages: High efficiency: High degree of mechanical automation, batch welding of pipe fittings can be carried out, avoiding delays in on-site cutting and welding processes, and welding tasks can be completed quickly, improving production efficiency. Compared with similar pipe welds, it can shorten the total construction period by 30-50%. High quality: The welding position is a flat welding position, which has the fastest welding speed, the best welding quality, and is more convenient to operate. The final result is an improved weld pass rate and more reliable weld quality. Safety: Automated operation reduces the need for personnel such as fitters and pipe fitters, and no handling or adjustment is required during the welding process, making construction safer and more reliable.

[0019] Flexible: The automatic device can adapt to welding steel pipes of different diameters and materials, making the welding operation simpler. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 A perspective view of a specific embodiment of the pipe prefabrication and welding device provided in this invention; Figure 2 for Figure 1 A three-dimensional view of the upper half of the first support mechanism in the prefabricated pipe welding device shown. Figure 3 for Figure 1 A three-dimensional view of the lower half of the first support mechanism in the prefabricated pipe welding device shown; Figure 4 for Figure 1 A perspective view of the second support mechanism in the prefabricated pipe welding device shown.

[0022] Explanation of reference numerals in the attached figures 1. First support structure; 2. Second support structure; 3. First support wheel assembly; 301. Drive shaft; 302. First support wheel; 303. Driven wheel; 304. Sliding device; 4. First lifting device; 401. Guide component; 402. Sliding component; 403. Locking device; 404. Crossbeam; 405. Lateral guide structure; 5. Pressure wheel assembly; 501. Pressure wheel frame; 502. Pressure wheel; 503. Vertical threaded rod; 6. Drive unit; 601. Motor; 602. Programmable logic controller; 603. Foot switch; 7. Second lifting device; 701. Vertical lead screw; 702. Operating rotation device; 8. Second support wheel assembly; 801. Support wheel frame; 802. Second support wheel; 9. Pipes. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0027] like Figure 1As shown, this is a specific implementation of the pipe prefabrication welding device provided in this embodiment, including: a first support mechanism 1 and a second support mechanism 2, which are arranged at intervals; in use, the pipe 9 is supported by the first support mechanism 1 and the second support mechanism 2 together, thereby facilitating the welding of the pipe 9.

[0028] like Figure 2 , Figure 3 As shown, the first support mechanism 1 has a first support wheel group 3, a first lifting device 4, a pressing wheel group 5 and a driving device 6. The pressing wheel group 5 is located above the first support wheel group 3. The first lifting device 4 is used to adjust the height of the pressing wheel group 5. By adjusting the height of the pressing wheel group 5, the space between the first support wheel group 3 and the pressing wheel group 5 can be adjusted to accommodate different pipe diameters 9.

[0029] like Figure 1 As shown, the drive device 6 is connected to the first support wheel group 3 and is used to drive the pipe 9 between the first support wheel group 3 and the pressure wheel group 5 to rotate. The drive device 6 has a foot switch 603, which is a step-type structure. The foot switch 603 is electrically connected to the drive device 6 through a wire and is located at the weld seam. This arrangement makes it easier for welding workers to control the rotation of the pipe 9 at the weld seam, thus making welding operations more convenient.

[0030] like Figure 4 As shown, the second support mechanism 2 has a second lifting device 7, and the second lifting device 7 is equipped with a second support wheel set 8. During installation, the height of the second support wheel set 8 is adjusted by the second lifting device 7 to adapt to the height of the first support wheel set 3, thereby keeping the pipe 9 horizontal and ensuring the stability of the pipe 9 when rotating, thus improving the welding quality.

[0031] The pipe prefabrication and welding device provided in this embodiment has the advantages of simple structure, light weight, small footprint, and simple operation.

[0032] like Figure 1 As shown, in some embodiments, the drive device 6 may include a motor 601 and a programmable logic controller (PLC) 602, which is electrically connected to both the motor 601 and a foot switch 603. By setting parameters through the PLC 602, the rotational speed of the motor 601 can be controlled. Through its electrical connection to the foot switch 603, when the welder presses the foot switch 603, the motor 601 is automatically controlled to output power and rotate. Releasing the foot switch 603 stops the motor 601 from outputting power.

[0033] like Figure 3 , Figure 4As shown, in some embodiments, a drive wheel is connected to the drive shaft of the motor 601. The drive wheel can be connected to the first support wheel assembly 3 via a transmission belt or a transmission chain. Specifically, the first support wheel assembly 3 includes two parallel and spaced-apart drive shafts 301, with first support wheels 302 connected to both ends of the two drive shafts 301 respectively. The rims of the two first support wheels 302 are made of soft material or covered with insulating rubber to avoid contamination of the stainless steel pipe 9.

[0034] like Figure 3 As shown, a driven pulley 303 is connected in the middle of a drive shaft 301, and the driven pulley 303 is connected to the drive pulley via a drive belt. In some embodiments, the drive pulley and the driven pulley 303 each have annular grooves for embedding the drive belt, and the drive belt is a V-belt. Of course, the above description is not limiting. In some alternative embodiments, the drive belt can also be a synchronous belt, and correspondingly, the rims of the drive pulley and the driven pulley 303 are provided with toothed structures that cooperate with the synchronous belt.

[0035] like Figure 3 , Figure 4 As shown, in some embodiments, two drive shafts 301 are respectively connected to a sliding device 304, which is used to adjust the distance between the two drive shafts 301. Specifically, the sliding device 304 includes at least two parallel and spaced slide rails, each with a slider slidably connected to it. The drive shafts 301 are rotatably mounted on the sliders, and a locking structure exists between the sliders and the slide rails. In use, the slider connected to the drive shaft 301 with the drive wheel installed can be locked, while the slider connected to the drive shaft 301 without the drive wheel installed slides on the slide rail. After adjusting the distance between the two drive shafts 301, this slider is also locked, thus adapting to different pipe diameters and making the support of the first support wheel group 3 for the pipe 9 more stable.

[0036] It should be noted that the locking structure can take many forms, such as screw locking or locating pin locking.

[0037] like Figure 2As shown, in some embodiments, the first lifting device 4 includes a guide member 401, a sliding member 402, and a locking device 403. The guide member 401 extends vertically, the sliding member 402 is slidably disposed on the guide member 401, and the locking device 403 is disposed on the sliding member 402 for locking the sliding member 402. A crossbeam 404 is connected to the sliding member 402, and the crossbeam 404 has a transverse guide structure 405. The pressure wheel assembly 5 is connected to the transverse guide structure 405. Specifically, the guide member 401 is a cylindrical structure, the sliding member 402 has an annular sleeve structure sleeved on the guide member 401, and the locking device 403 is a locking screw. The locking device 403 is threadedly connected to the sliding member 402 and then passes through the sliding member 402 to press against the guide member 401, or is inserted into a positioning groove on the guide member 401. Of course, the above description is not limiting. In some alternative embodiments, the guide member 401 may also be a rectangular column or other track form. A rolling or sliding device 304 may be provided between the sliding member 402 and the guide member 401.

[0038] like Figure 2 As shown, in some embodiments, the clamping wheel assembly 5 includes a clamping wheel frame 501, on which two connecting rods are arranged in parallel and spaced apart. Each end of the two connecting rods is connected to a clamping wheel 502. Specifically, the clamping wheel 502 and the connecting rods can be rotatably connected via bearings or directly rotatably connected. The rim of the clamping wheel 502 is made of a soft material or is covered with insulating rubber to avoid contaminating the stainless steel pipe 9.

[0039] like Figure 2 As shown, in some embodiments, the clamping wheel frame 501 includes an angle steel, with its two extended sides welded to two connecting rods respectively. A U-shaped steel is welded onto the angle steel, and a vertical threaded rod 503 is connected to the U-shaped steel, which is then connected to the transverse guide structure 405. Specifically, the transverse guide structure 405 is a through groove extending along the extension direction of the crossbeam 404, and the vertical threaded rod 503 passes through the through groove, with locking nuts connected to both ends.

[0040] like Figure 4 As shown, in some embodiments, the second lifting device 7 includes a vertical lead screw 701, which is threadedly connected to the support frame of the second support mechanism 2. The top end of the vertical lead screw 701 is rotatably connected to the second support wheel assembly 8, and the bottom end has an operating rotation device 702. In some embodiments, a locking screw is connected to the support frame of the second support mechanism 2, which is used to lock the vertical lead screw 701.

[0041] like Figure 4As shown, in some embodiments, the second support wheel assembly 8 includes a support wheel frame 801, on which two connecting rods are arranged in parallel at intervals, and the two ends of the two connecting rods are respectively connected to second support wheels 802. Specifically, the two second support wheels 802 can be rotatably connected to the connecting rods via bearings, or they can be directly rotatably connected. The rims of the two second support wheels 802 are made of soft material or covered with insulating rubber to avoid contamination of the stainless steel pipe 9.

[0042] How to use: First, check the prerequisites for starting work: 1) Welding methods: non-consumable electrode tungsten inert gas welding; non-consumable electrode tungsten inert gas welding + electric arc welding; electric arc welding.

[0043] 2) First, ensure the equipment is safe and stable, and that the grounding device is properly grounded; 3) Prepare the welding pipelines for the day and complete the assembly; 4) Prepare the welding materials needed for welding; 5) Ensure the welder's welding condition.

[0044] Then, solid welding is performed, with the following process logic: 1) Adjust the rotation speed according to the specimen specifications; 2) Adjust the second support mechanism 2 to ensure that it is at the same height as the first support mechanism 1 and is located on the same axis; 3) Install the pipe 9 to be welded onto the device. It should be noted that the weld joint on the pipe 9 to be welded can be fixed by spot welding first, or a fixing device can be used to fix it to ensure that the two pipe sections 9 can rotate synchronously on the device. 4) Adjust the first support wheel group 3 on the first support mechanism 1 to ensure that each first support wheel 302 is in close contact with the pipe 9; 5) Press the start button of the drive device 6. After the start button is pressed, it is only in the power-on state. Step on the foot switch 603 to test run the device and ensure that it is in good operating condition. 6) The welder adjusts his posture, steps on foot switch 603 to start welding, and completes the welding of the entire weld seam if there are no abnormalities. 7) Repeat the above steps. If any abnormality occurs during the welding process, release the foot switch 603 immediately. Start welding after the abnormality is resolved.

[0045] 8) Turn off the power supply and clean up the completed pipes 9 and the unwelded pipes 9.

[0046] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the present invention.

Claims

1. A pipe prefabrication welding device, characterized in that, include: A first support mechanism (1) and a second support mechanism (2) are provided at intervals; The first support mechanism (1) has a first support wheel group (3), a first lifting device (4), a pressing wheel group (5) and a driving device (6). The pressing wheel group (5) is located above the first support wheel group (3). The first lifting device (4) is used to adjust the height of the pressing wheel group (5). The driving device (6) is connected to the first support wheel group (3) and is used to drive the pipe (9) between the first support wheel group (3) and the pressing wheel group (5) to rotate. The driving device (6) has a foot switch (603). The foot switch (603) is a step-type structure. The foot switch (603) is electrically connected to the driving device (6) through a wire. The foot switch (603) is located at the weld position. The second support mechanism (2) has a second lifting device (7), and the second lifting device (7) is provided with a second support wheel set (8).

2. The pipe prefabrication and welding device according to claim 1, characterized in that, The drive device (6) includes a motor (601) and a programmable logic controller (602), wherein the programmable logic controller (602) is electrically connected to the motor (601) and the foot switch (603).

3. The pipe prefabrication and welding device according to claim 2, characterized in that, A drive wheel is connected to the drive shaft of the motor (601), and the drive wheel is connected to the first support wheel group (3) via a transmission belt.

4. The pipe prefabrication and welding device according to claim 1, characterized in that, The first support wheel assembly (3) includes two drive shafts (301) arranged in parallel and spaced apart. The two ends of the two drive shafts (301) are respectively connected to the first support wheel (302), and at least one of the drive shafts (301) is connected to the drive device (6).

5. The pipe prefabrication and welding device according to claim 4, characterized in that, At least one of the drive shafts (301) is connected to a sliding device (304) for adjusting the distance between the two drive shafts (301).

6. The pipe prefabrication and welding device according to claim 5, characterized in that, The sliding device (304) includes at least two parallel and spaced slide rails, on which a slider is slidably connected. The drive shaft (301) is rotatably mounted on the slider, and a locking structure is provided between the slider and the slide rail.

7. The pipe prefabrication and welding device according to claim 1, characterized in that, The first lifting device (4) includes a guide (401), a sliding member (402) and a locking device (403). The guide (401) extends in the vertical direction, the sliding member (402) is slidably disposed on the guide (401), and the locking device (403) is disposed on the sliding member (402) for locking the sliding member (402).

8. The pipe prefabrication and welding device according to claim 7, characterized in that, A crossbeam (404) is connected to the sliding member (402), and the crossbeam (404) has a transverse guide structure (405). The pressure wheel assembly (5) is connected to the transverse guide structure (405).

9. The pipe prefabrication and welding device according to claim 8, characterized in that, The clamping wheel assembly (5) includes a clamping wheel frame (501), which has two parallel connecting rods spaced apart. The two ends of the two connecting rods are respectively connected to clamping wheels (502). A vertical threaded rod (503) is connected to the clamping wheel frame (501), and the vertical threaded rod (503) is connected to the transverse guide structure (405).

10. The pipe prefabrication and welding apparatus according to any one of claims 1-9, characterized in that, The second lifting device (7) includes a vertical screw (701), which is threadedly connected to the support frame of the second support mechanism (2). The top end of the vertical screw (701) is rotatably connected to the second support wheel group (8), and the bottom end has an operating rotating device (702).

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