Pipeline welding device for hydraulic engineering

Abstract

The present application relates to the technical field of pipeline welding, and particularly relates to a pipeline welding device for water conservancy projects; the pipeline welding device comprises a soft rail, a plurality of magnetic bases one installed on the soft rail, and a welding trolley walking on the soft rail, a fixing frame is arranged on the welding trolley, and clamping blocks for fixing a welding gun are arranged on the fixing frame; a tensioning mechanism is arranged on the soft rail, and a knocking mechanism is arranged on the fixing frame; through the servo motor, the swing rod, the shock-absorbing spring and the hammer in the knocking mechanism, and the rope, the winding wheel, the winding part, the seat body and the second magnetic base in the tensioning mechanism, the device can be fixed to a magnetic pipeline by the magnetic base, the soft rail and the magnetic base can be tightly fixed to a non-magnetic pipeline by the rope tensioning, the device can automatically knock and remove welding slag during the welding process, and thus the problems that the welding device cannot be fixed to a non-magnetic pipeline and the low efficiency of manual slag removal in the prior art are effectively solved.

Description

Technical Field

[0001] This invention relates to the field of pipeline welding technology, and in particular to a pipeline welding device for water conservancy projects. Background Technology

[0002] In water conservancy projects, water transmission pipelines typically use ferromagnetic pipes such as carbon steel. However, in applications involving corrosive water or requiring high cleanliness (such as drinking water or chemical wastewater), non-magnetic pipes such as stainless steel are used. On-site welding of these large-diameter pipes usually employs a flexible rail welding trolley for automatic or semi-automatic welding. The flexible rail consists of a flexible steel strip and multiple magnetic seats. The magnetic seats adhere to the pipe surface, providing a track for the welding trolley. During welding, the trolley moves along the flexible rail, driving the welding torch to complete the circumferential welding operation.

[0003] Large-diameter pipes have thick walls, and the penetration depth of a single weld is limited, so multiple layers and multiple passes are required to fill the gaps layer by layer. The subsequent welds are used to temper the previous welds to ensure weld quality and mechanical properties. In addition, the flexible rail is made of flexible strip steel and is not a complete circle. To complete the circumference, it is necessary to weld in sections. After each section is welded, the flexible rail must be removed and reinstalled to the next section. This process is repeated until the entire circumference is welded.

[0004] However, the following problems exist in the current pipeline welding process: In multi-layer and multi-pass welding operations of large-diameter pipelines, the surface weld scale must be removed after each weld is completed before the next weld can be made. Currently, this process mainly relies on welders manually chiseling with hand tools, resulting in low slag removal efficiency and a significant increase in overall welding time. At the same time, the existing soft-rail welding trolley relies on magnetic seats to adhere to the pipeline surface for fixation. This fixation method is only suitable for ferromagnetic pipelines such as carbon steel, but it cannot generate effective adsorption force for non-magnetic pipelines such as stainless steel and aluminum alloys, resulting in unreliable fixation of the soft rail and severely limiting the application range of the welding equipment.

[0005] Therefore, the low efficiency of slag removal and the inability of fixing methods to simultaneously accommodate both magnetic and non-magnetic pipelines are technical problems that need to be solved by those skilled in the art. Summary of the Invention

[0006] In view of the above problems, the present invention provides a pipe welding device for water conservancy projects to solve the aforementioned technical problems.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a pipe welding device for water conservancy projects, comprising a flexible rail, a plurality of magnetic seats installed on the flexible rail, and a welding trolley that travels on the flexible rail. The welding trolley is provided with a fixed frame, and the fixed frame is provided with a clamp for fixing the welding gun; the flexible rail is provided with a tensioning mechanism, and the fixed frame is provided with a striking mechanism.

[0008] The tensioning mechanism includes two ropes installed on the flexible rail, multiple flexible seats installed between the ropes and the flexible rail, a seat body installed at one end of the ropes, a magnetic seat two installed on the seat body, a rotating shaft detachably installed on the seat body, two winding wheels installed on the rotating shaft, the other end of the rope is wound around the corresponding winding wheel, and a winding part that cooperates with the rotating shaft is provided on the seat body.

[0009] The striking mechanism includes a servo motor mounted on a fixed frame. The output shaft of the servo motor is equipped with a swing arm, which has a 7-shaped structure. One end of the swing arm is equipped with a hammer. The servo motor drives the swing arm to swing, causing the hammer to strike the welding slag.

[0010] The winding section drives the rotating shaft to rotate, causing the winding wheel to wind up the rope. The rope is tensioned and pulls the flexible rail and magnetic base to press against the pipe surface. When the pipe is a magnetic pipe, the magnetic base is attracted to the pipe surface, and the rope provides auxiliary reinforcement. When the pipe is a non-magnetic pipe, the magnetic base is pressed and positioned against the pipe surface by the tension of the rope, and the rope provides primary fixation.

[0011] As a preferred embodiment, the limiting part includes two through holes opened on the fixed plate, a limiting post 1 is slidably installed in the through holes, a connecting plate is fixedly installed on the upper end of the limiting post 1, and a limiting hole 1 corresponding to the limiting post 1 is opened on the base body, the limiting post 1 slides through the through hole to the limiting hole 1.

[0012] As a preferred embodiment, a spline sleeve is rotatably mounted on the base via a shaft plate, and a spline shaft is coaxially fixedly mounted on the rotating shaft, with the spline shaft and the spline sleeve slidingly inserted into each other.

[0013] As a preferred option, a pair of limiting posts are fixedly installed on the right end of the right shaft seat. The seat body 22 has limiting holes that correspond one-to-one with the limiting posts, and the limiting posts are inserted into the corresponding limiting holes.

[0014] As a preferred embodiment, a shock-absorbing spring is fixedly installed at the end of the swing arm away from the servo motor, and the hammer is fixedly installed at the other end of the shock-absorbing spring.

[0015] As a preferred embodiment, the winding section includes a worm gear rotatably mounted on the base, and a worm wheel that meshes with the worm gear is fixedly mounted on the spline sleeve.

[0016] As a preferred embodiment, the base is rotatably mounted with guide wheels that correspond one-to-one with the ropes.

[0017] As a preferred embodiment, the front end face of the worm gear is provided with an internal hexagonal hole.

[0018] As a preferred embodiment, the connecting plate and the fixing plate are fixed together by magnetic attraction.

[0019] The above-mentioned one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects: First, by setting a servo motor, swing arm, shock-absorbing spring and hammer in the striking mechanism, and a rope, winding wheel, winding part, seat and magnetic seat in the tensioning mechanism, the present invention enables the device to be fixed to the magnetic pipe by using the magnetic seat to attract and fix it, and to press and fix the soft rail and magnetic seat to the non-magnetic pipe by the rope tensioning. At the same time, it can automatically knock and remove welding slag during the welding process, thereby effectively solving the problems of welding devices being unable to be fixed to non-magnetic pipes and low efficiency of manual slag removal in the prior art.

[0020] Second, the present invention uses a servo motor in the striking mechanism to drive a swing arm with a figure-7 structure to swing back and forth, which drives the hammer at the end of the shock-absorbing spring to repeatedly strike the surface of the weld, so that the weld slag will fall off automatically without manual intervention, thus avoiding welding interruptions caused by manual slag removal and ensuring the continuous progress of the welding process.

[0021] Third, the present invention drives the rotating shaft to rotate through the winding part in the tensioning mechanism, so that the winding wheel winds up the rope. After the rope is tensioned, it pulls the soft rail and all the magnetic seats to press against the surface of the pipe. When the pipe is a non-magnetic pipe, although the magnetic seats can not generate an adsorption force, the tension of the rope becomes the main fixing force, which reliably presses the soft rail and magnetic seats against the surface of the pipe. Thus, the same device can be used for both magnetic and non-magnetic pipes at the same time.

[0022] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0025] Figure 2 This is a schematic diagram of the tensioning mechanism of the present invention.

[0026] Figure 3 This is a schematic diagram of the limiting part of the present invention.

[0027] Figure 4 This is a schematic diagram of the structure between the magnetic base, telescopic base and soft base of the present invention.

[0028] Figure 5This is a schematic diagram of the striking mechanism of the present invention.

[0029] Figure 6 This is a cross-sectional view of the winding section of the present invention.

[0030] Reference numerals: 10. Flexible rail; 11. Magnetic base one; 12. Welding carriage; 13. Fixing frame; 14. Clamping block; 15. Welding torch; 2. Tensioning mechanism; 20. Rope; 21. Flexible base; 22. Base body; 220. Guide wheel; 23. Magnetic base two; 24. Rotating shaft; 240. Shaft seat; 241. Fixing plate; 242. Splined shaft; 243. Splined sleeve; 25. Rewinding wheel; 4. Rewinding part; 40. Worm; 41. Worm wheel; 5. Limiting part; 50. Limiting post one; 51. Connecting plate; 52. Limiting hole one; 53. Limiting post two; 3. Striking mechanism; 30. Servo motor; 31. Swing arm; 32. Hammer; 320. Shock-absorbing spring. Detailed Implementation

[0031] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] like Figure 1 and Figure 2 As shown, a pipe welding device for water conservancy projects includes a flexible rail 10, multiple magnetic seats 11 fixedly installed on the flexible rail 10, and a welding trolley 12 that travels on the flexible rail 10. The welding trolley 12 is provided with a fixing frame 13, and the fixing frame 13 is provided with a clamping block 14 for fixing a welding torch 15. The flexible rail 10 is provided with a tensioning mechanism 2, and the fixing frame 13 is provided with a striking mechanism 3.

[0033] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the tensioning mechanism 2 includes two ropes 20 mounted on the flexible rail 10. Multiple flexible seats 21 are fixedly installed between the ropes 20 and the flexible rail 10. One end of each rope 20 is fixedly mounted on a seat body 22. A magnetic seat 23 is mounted on the seat body 22. A rotating shaft 24 is detachably mounted on the seat body 22. Two winding wheels 25 are fixedly mounted on the rotating shaft 24. The other end of the rope 20 is wound around the corresponding winding wheel 25. A winding part 4 that cooperates with the rotating shaft 24 is provided on the seat body 22.

[0034] like Figure 1 , Figure 2 and Figure 5 As shown, the striking mechanism 3 includes a servo motor 30 fixedly mounted on the fixed frame 13. The output shaft of the servo motor 30 is fixedly mounted with a swing arm 31. The swing arm 31 has a 7-shaped structure. A hammer 32 is provided at the end of the swing arm 31 away from the servo motor 30. The servo motor 30 drives the swing arm 31 to swing back and forth, so that the hammer 32 strikes the welding slag.

[0035] like Figure 5 As shown, a shock-absorbing spring 320 is fixedly installed at the end of the swing arm 31 away from the servo motor 30, and the hammer 32 is fixedly installed at the other end of the shock-absorbing spring 320.

[0036] like Figures 1 to 5 As shown, during the actual operation, the flexible rail 10 is laid on the starting section of the pipe to be welded, so that the magnetic seat 11 on the lower surface of the flexible rail 10 is in contact with the pipe surface. The seat 22 is placed on the pipe near one end of the flexible rail 10 through the magnetic seat 23, and the two ropes 20 are respectively located on both sides of the flexible rail 10. The ropes 20 are in a slack state. Then, the winding part 4 is operated to drive the rotating shaft 24 to rotate. The rotating shaft 24 drives the two winding wheels 25 to simultaneously wind up the ropes 20. The ropes 20 are gradually tightened. After the ropes 20 are tightened, the flexible rail 10 and all the magnetic seats 11 are pulled to press against the pipe surface.

[0037] If the pipe is a magnetic pipe, the magnetic base 11 and magnetic base 23 are attracted to the surface of the pipe, and the tension of the rope 20 plays an auxiliary reinforcing role; if the pipe is a non-magnetic pipe, the magnetic base 11 and magnetic base 23 cannot be attracted, and the tension of the rope 20 becomes the main fixing force, pressing the flexible rail 10 and magnetic base 11 tightly to the surface of the pipe, while the seat body 22 is also tightened and fixed by the rope 20.

[0038] After the fixing is completed, the welding trolley 12 moves along the soft rail 10, and the clamping block 14 on the fixing frame 13 clamps the welding gun 15 for welding. At the same time, the servo motor 30 on the fixing frame 13 drives the swing arm 31 to swing back and forth. The hammer 32 connected to the end of the swing arm 31 through the shock-absorbing spring 320 repeatedly strikes the surface of the weld seam to shake off and remove the welding slag. The shock-absorbing spring 320 absorbs the impact of the impact and prevents the impact from being transmitted to the welding gun 15.

[0039] Since the length of the flexible rail 10 is limited, it can only cover a part of the circumference of the pipe at a time. Therefore, after the welding of the current section is completed, the winding part 4 needs to be reversed to release the tension of the rope 20, and the flexible rail 10 and the seat 22 are moved to the adjacent unwelded section, re-tensioned and fixed and welded. The above process is repeated until the entire circumferential seam is welded. For multi-layer and multi-pass welding, the hammer 32 automatically cleans the slag after each weld, and the welding carriage 12 can continuously perform the next weld.

[0040] like Figure 3 , Figure 4 and Figure 6As shown, both ends of the rotating shaft 24 are rotatably mounted with shaft seats 240, and a fixing plate 241 is fixedly mounted on the upper end of the shaft seats 240. A limiting part 5 is provided between the fixing plate 241 and the seat body 22.

[0041] like Figure 4 and Figure 6 As shown, a spline sleeve 243 is rotatably mounted on the base 22 via a shaft plate, and a spline shaft 242 is coaxially fixedly mounted on the rotating shaft 24. The spline shaft 242 and the spline sleeve 243 are slidably inserted into each other.

[0042] like Figure 4 and Figure 6 As shown, the winding section 4 includes a worm gear 40 rotatably mounted on the base 22, and a worm wheel 41 that meshes with the worm gear 40 is fixedly mounted on the spline sleeve 243.

[0043] like Figure 2 As shown, the front end face of the worm gear 40 has an internal hexagonal hole.

[0044] like Figure 2 and Figure 3 As shown, guide wheels 220 corresponding to ropes 20 are rotatably mounted on the seat 22.

[0045] like Figures 1 to 6 As shown, during operation, the rotating shaft 24, two take-up wheels 25, end bearings 240, fixing plate 241, and spline shaft 242 are integrated into a single assembly. This assembly is moved towards the base 22, aligning the spline shaft 242 with the spline sleeve 243 rotatably mounted on the base 22 via the bearing plate. Then, the assembly is moved along the axis of the spline sleeve 243, allowing the spline shaft 242 to slide into the spline sleeve 243, achieving a sliding engagement between the spline shaft 242 and the spline sleeve 243. At this time, the rope 20 is located below the corresponding guide wheel 220. Simultaneously, the fixing plate 241 at the upper end of the end bearings 240 of the rotating shaft 24 is positioned relative to the base 22 by the limiting part 5, preventing the assembly from moving or falling off.

[0046] After the connection is completed, the internal hexagonal hole at the front end of the worm gear 40 is manually rotated using an electric torque wrench. The worm gear 40 drives the worm wheel 41 to rotate, which in turn drives the spline sleeve 243 to rotate. The spline sleeve 243 drives the rotating shaft 24 and the two winding wheels 25 to rotate synchronously through the spline shaft 242, thereby winding up the rope 20. Under the guidance of the guide wheel 220, the rope 20 is smoothly wound up and gradually tensioned. The tensioned rope 20 pulls the flexible rail 10 and all the magnetic seats 11 to press against the pipe surface: when the pipe is a magnetic pipe, the magnetic seats 11 and 23 are attracted to the pipe surface, and the rope 20 provides auxiliary reinforcement; when the pipe is a non-magnetic pipe, the tension of the rope 20 becomes the main fixing force, pressing the flexible rail 10 and the magnetic seats 11 tightly against the pipe surface, while the seat body 22 is also tightened and fixed by the rope 20.

[0047] like Figure 2 and Figure 3 As shown, the limiting part 5 includes two through holes opened on the fixed plate 241. A limiting post 50 is slidably installed in the through holes. A connecting plate 51 is fixedly installed on the upper end of the limiting post 50. A limiting hole 52 corresponding to the limiting post 50 is opened on the base 22. The limiting post 50 slides through the through hole into the limiting hole 52.

[0048] like Figure 3 As shown, a pair of limiting posts 53 are fixedly installed on the right end of the right side bearing 240. The bearing body 22 has limiting holes that correspond one-to-one with the limiting posts 53, and the limiting posts 53 are inserted into the corresponding limiting holes.

[0049] like Figure 2 As shown, the connecting plate 51 and the fixing plate 241 are fixed together by magnetic attraction.

[0050] like Figures 1 to 3 As shown, during actual operation, after the splined shaft 242 is inserted into the splined sleeve 243, the two through holes on the fixing plate 241 are aligned with the two limiting holes 52 on the seat 22. Then, the limiting post 50 is slid through the through hole and inserted into the corresponding limiting hole 52. The connecting plate 51, which is fixed to the upper end of the limiting post 50, is magnetically attracted to the fixing plate 241 to further prevent the limiting post 50 from coming out of the limiting hole 52. At the same time, the pair of limiting posts 52 on the right end of the right side of the shaft seat 240 are also fixed. 3. Insert the corresponding limiting hole 2 on the seat 22. Through the cooperation of limiting post 50 and limiting hole 52, and limiting post 23 and limiting hole 2, the fixing plate 241 and the entire rotating shaft 24 assembly are locked on the seat 22 in the axial and circumferential directions to prevent the rotating shaft 24 from moving or swaying when it rotates. In this way, when the worm gear 40 is rotated to wind the rope 20, the rotating shaft 24 and the winding wheel 25 can rotate stably. After the rope 20 is tensioned, it can reliably pull the soft rail 10 and the magnetic seat 11 to press the pipe surface.

[0051] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0052] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0053] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "connected" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0054] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A pipe welding device for water conservancy projects, comprising a flexible rail, multiple magnetic seats mounted on the flexible rail, and a welding trolley that travels on the flexible rail, wherein the welding trolley is provided with a fixing frame, and the fixing frame is provided with clamps for fixing the welding torch; characterized in that: The flexible rail is equipped with a tensioning mechanism, and the fixed frame is equipped with a striking mechanism. The tensioning mechanism includes two ropes installed on the flexible rail, multiple flexible seats installed between the ropes and the flexible rail, a seat body installed at one end of the ropes, a magnetic seat two installed on the seat body, a rotating shaft detachably installed on the seat body, two winding wheels installed on the rotating shaft, the other end of the rope is wound around the corresponding winding wheel, and a winding part that cooperates with the rotating shaft is provided on the seat body. The striking mechanism includes a servo motor mounted on a fixed frame. The output shaft of the servo motor is equipped with a swing arm, which has a 7-shaped structure. One end of the swing arm is equipped with a hammer. The servo motor drives the swing arm to swing, causing the hammer to strike the welding slag. The winding section drives the rotating shaft to rotate, causing the winding wheel to wind up the rope. The rope is tensioned and pulls the flexible rail and magnetic base to press against the pipe surface. When the pipe is a magnetic pipe, the magnetic base is attracted to the pipe surface, and the rope provides auxiliary reinforcement. When the pipe is a non-magnetic pipe, the magnetic base is pressed and positioned against the pipe surface by the tension of the rope, and the rope provides primary fixation.

2. The pipe welding device for water conservancy projects according to claim 1, characterized in that: Both ends of the rotating shaft are rotatably mounted with shaft seats, and a fixing plate is fixedly mounted on the upper end of the shaft seats. A limit part is provided between the fixing plate and the seat body.

3. The pipe welding device for water conservancy projects according to claim 2, characterized in that: The limiting part includes two through holes opened on the fixed plate. A limiting post is slidably installed in the through holes. A connecting plate is fixedly installed on the upper end of the limiting post. A limiting hole is opened on the base body, which corresponds to the limiting post. The limiting post slides through the through hole into the limiting hole.

4. The pipe welding device for water conservancy projects according to claim 1, characterized in that: A spline sleeve is rotatably mounted on the base via a shaft plate, and a spline shaft is coaxially fixedly mounted on the rotating shaft. The spline shaft and the spline sleeve are slidably inserted into each other.

5. A pipe welding device for water conservancy projects according to claim 2, characterized in that: A pair of limit pins are fixedly installed on the right end of the right shaft seat. The seat body has limit holes that correspond to the limit pins. The limit pins are inserted into the corresponding limit holes.

6. A pipe welding device for water conservancy projects according to claim 1, characterized in that: A shock-absorbing spring is fixedly installed at the end of the swing arm away from the servo motor, and the hammer is fixedly installed at the other end of the shock-absorbing spring.

7. A pipe welding device for water conservancy projects according to claim 4, characterized in that: The winding section includes a worm gear rotatably mounted on the base, and a worm wheel that meshes with the worm gear is fixedly mounted on the spline sleeve.

8. A pipe welding device for water conservancy projects according to claim 1, characterized in that: The base is rotatably mounted with guide wheels that correspond one-to-one with the ropes.

9. A pipe welding device for water conservancy projects according to claim 7, characterized in that: The front end face of the worm gear has an internal hexagonal hole.

10. A pipe welding device for water conservancy projects according to claim 3, characterized in that: The connecting plate and the fixing plate are fixed together by magnetic attraction.

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