Key pressing plate mechanism for pipe welding
Through the design of the key pressing mechanism, the deformation and offset problems on both sides of the welds in pipe welding are solved, and the stability and accuracy of welding are achieved, and the structure is clever, convenient and practical.
Patent Information
- Application Number
- CN202422397583.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-09-30
AI Technical Summary
In the prior art, both sides of the weld are easily affected by internal stress during welding of pipes, resulting in deformation and offset, and affecting the welding effect.
The key pressing mechanism is adopted, and the combination of the key pressing plate assembly, airbag and buffer spring can achieve stable pressing and resetting on both sides of the pipe weld, and the synchronization of the key connecting rod and the connecting plate and the guiding groove are used to ensure welding accuracy.
Effectively reduce the deformation and offset of welds during welding, improve the stability and accuracy of welding, and ensure the welding effect.
Smart Images
Figure CN223146341U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of pipe welding pressure positioning, and particularly relates to a piano key pressing plate mechanism for pipe welding. Background Art
[0002] Pipe welding is a technical method of connecting pipes or pipe fittings into a whole through a welding process, and is widely used in industries such as petroleum, chemical industry, natural gas, shipbuilding, and electric power. Welding not only requires the strength and tightness of the weld, but also needs to consider factors such as the material, specification, shape, working pressure, temperature, and medium of the pipe, which is a high-tech and difficult task.
[0003] When welding the weld of a pipe, it is necessary to press and position both sides of the weld. In the prior art, the pipe is usually fixed by spot welding first, and then the workpiece to be welded is fixed at a specific position and angle by a fixture. However, internal stress is generated at the welding part during the welding process of the weld, and the internal stress is likely to cause deformation of both sides of the weld, and even offset of the weld at the welding part, affecting the overall welding effect. Therefore, it is necessary to develop a pressing mechanism that can press the pipe on both sides of the weld on the pipe. Summary of the Invention
[0004] The purpose of the utility model is to provide a piano key pressing plate mechanism for pipe welding, with a clever structure, which can comprehensively and efficiently press both sides of the weld on the pipe, ensure the stability of the pipe during welding, and also reduce the deformation of the pipe during welding, which is highly efficient and practical.
[0005] The technical solution for achieving the purpose of the present utility model is as follows: The present utility model has a frame; on the frame, there are key plate assemblies arranged oppositely and capable of pressing and positioning the upper end of the pipe. There is a welding gap between the oppositely arranged key plate assemblies. The key plate assembly includes a key link rotatably connected to the frame, a key connecting plate arranged parallel to the key link, a plurality of key plates evenly distributed along the extending direction of the key link, and a pressing airbag that can expand after being inflated. The two ends of each key plate are respectively fixedly connected to the key link and the key connecting plate. On the frame, there is also a limit pressing plate located between the frame and each key plate. The pressing airbag is arranged between the limit pressing plate and each key plate. The limit pressing plate is provided with an air joint for inflating the pressing airbag after being connected to an external air pump. The upper end of each key plate is provided with a vertically arranged limit link. Each limit link passes through the limit pressing plate and is slidably connected to the limit pressing plate. A buffer spring is sleeved on each limit link. Each buffer spring is located above the limit pressing plate. The two ends of each buffer spring act between the limit pressing plate and the corresponding limit link respectively. Each key plate presses the pipe after the pressing airbag is inflated, and after the pressing airbag deflates, it is reset through the sliding cooperation between each limit link and the limit pressing plate and the continuous force application of the buffer spring.
[0006] Further, on the bottom surface of the above-mentioned limit pressing plate, there are oppositely arranged mounting blocks. The two ends of the pressing airbag are fixed on the limit pressing plate through the mounting blocks. Each key plate is arranged between each mounting block.
[0007] Further, on both sides of each buffer spring, there is a limit nut. Each limit nut is provided with a limit screw adapted to the limit nut. The limit pressing plate is provided with through holes corresponding to and communicating with each limit nut. Each limit screw passes through the through hole through the thread cooperation with the limit nut to limit and press the reset key plate.
[0008] Further, each key link is rotatably connected to the frame through a connection component. The connection component includes a plurality of connection seats evenly arranged on the side wall of the frame along the extending direction of the key link, connection blocks corresponding to each connection seat and connected to the key link, and a connection shaft arranged between the connection seat and the connection block. At least two of each connection seat share a connection shaft. Each connection block is rotatably connected to the corresponding connection seat through the connection shaft. Each key link is rotatably connected to the frame through the rotational cooperation between each connection block and the connection seat.
[0009] Further, the above-mentioned key connecting plate is fixed to the bottom of each key plate. The oppositely arranged key connecting plates and the corresponding key plates on the corresponding side are fixed to form a welding gap. Each key connecting plate is provided with a guiding inclined surface. The guiding inclined surfaces on the oppositely arranged key connecting plates form a guiding groove communicating with the welding gap.
[0010] The utility model has positive effects: (1) By arranging the key pressing plate assembly on the frame, multiple key pressing plates can be synchronously pressed against both sides of the weld seam on the pipe after the pressing airbag is inflated. Through the continuous force application of each buffer spring and the inflation of the pressing airbag, the pipe is stably and firmly pressed, effectively solving the problem that the weld seam deviates due to the action of internal stress on both sides during the welding process in the prior art. On the other hand, the setting of the buffer spring can reset each key pressing plate after the pressing airbag deflates, further ensuring the stable pressing of each key pressing plate on the pipe. The structure is ingenious, convenient and practical.
[0011] (2) By arranging the mounting blocks on the limit pressing plate, each pressing airbag is pressed against the limit pressing plate through the mounting blocks. On the one hand, it can ensure the stability of the installation connection between the pressing airbag and the limit pressing plate, and on the other hand, it can also ensure the stability when the pressing airbag applies force to each key pressing plate after inflation. It is practical and convenient.
[0012] (3) By arranging the limit nuts on both sides of the reset spring, the limit screws on each limit nut adjust the initial position of each key pressing plate through the thread fit with the limit screw. By adjusting the initial position of the key pressing plate and the inflation of the pressing airbag, the pressing stroke of the key pressing plate is also adjusted, further ensuring the stability and firmness of the pressing of each key pressing plate on the pipe.
[0013] (4) By arranging the connecting seats on the frame, each connecting block ensures the smooth rotation of each key pressing plate through the rotational connection with the connecting seat. By sharing at least two connecting seats with a connecting shaft, the synchronism of each connecting block during rotation is further ensured, and at the same time, the synchronism of the key pressing plates during downward pressing is also ensured. It is efficient and practical.
[0014] (5) By arranging the key connecting plate at the bottom of each key pressing plate, the stability of the synchronous pressing of each key pressing plate on the pipe is ensured. At the same time, the guiding groove formed by the guiding inclined surface is also convenient for the tool setting of the pre-weld seam and the positioning welding of the welding torch in the later stage, thereby ensuring the welding accuracy. It is efficient and practical. Description of the Drawings
[0015] In order to make the content of the utility model easier to be clearly understood, the following further details the utility model according to specific embodiments in combination with the drawings, where
[0016] Figure 1 is the overall structural schematic diagram of the key pressing plate mechanism for pipe welding in the utility model;
[0017] Figure 2 Schematic diagram of the overall structure of the key pressing plate assembly and the frame arranged oppositely in the present utility model;
[0018] Figure 3 is Figure 2 the enlarged view of part A in
[0019] Figure 4 Schematic diagram of the overall structure of the key pressing plate assemblies arranged oppositely in the present utility model;
[0020] Figure 5 Schematic diagram of the connection structure of the key connecting plate in the present utility model. Specific embodiments
[0021] See Figures 1 to 5 , the present utility model has a frame 1; a key pressing plate 23 assembly 2 which is arranged oppositely and can press and position the upper end of the pipe is provided on the frame 1, a welding gap 3 is arranged between the oppositely arranged key pressing plate 23 assemblies 2, the key pressing plate 23 assembly 2 includes a key link 21 rotatably connected to the frame 1, a key connecting plate 22 arranged parallel to the key link 21, a plurality of key pressing plates 23 evenly distributed along the extending direction of the key link 21, and a pressing airbag 24 which can expand after being inflated. The two ends of each key pressing plate 23 are respectively fixedly connected to the key link 21 and the key connecting plate 22. A limiting pressing plate 25 is further provided on the frame 1. The limiting pressing plate 25 is located between the frame 1 and each key pressing plate 23. The pressing airbag 24 is arranged between the limiting pressing plate 25 and each key pressing plate 23. An air joint 250 for inflating the pressing airbag 24 is provided on the limiting pressing plate 25 after being connected to an external air pump. A vertically arranged limiting link 251 is provided at the upper end of each key pressing plate 23. Each limiting link 251 passes through the limiting pressing plate 25 and is slidably connected to the limiting pressing plate 25. A buffer spring 252 is sleeved on each limiting link 251. Each buffer spring 252 is located at the upper end of the limiting pressing plate 25. The two ends of each buffer spring 252 respectively act between the limiting pressing plate 25 and the corresponding limiting link 251. Each key pressing plate 23 presses the pipe after the pressing airbag 24 is inflated, and returns after the pressing airbag 24 deflates through the sliding fit between each limiting link 251 and the limiting pressing plate 25 and the continuous force application of the buffer spring 252.
[0022] The limiting pressing plate 25 is provided with through holes or waist-shaped grooves through which the limiting links 251 can pass. If it is a through hole, the diameter of the through hole is larger than the diameter of the limiting link 251 and has a margin for the limiting link 251 to displace in the through hole. If it is a waist-shaped groove, the groove length of the waist-shaped groove is larger than the diameter of the limiting link 251, providing a margin for the limiting link 251 to displace during the downward pressing of the key pressing plate 83.
[0023] The bottom surface of the limiting pressure plate 25 is provided with oppositely arranged mounting blocks 26. Both ends of the pressing airbag 24 are fixed on the limiting pressure plate 25 through the mounting blocks 26, and each key pressing plate 23 is arranged between the mounting blocks 26.
[0024] Both sides of each buffer spring 252 are provided with limiting nuts 254. Each limiting nut 254 is provided with a limiting screw rod 253 adapted to the limiting nut 254. The limiting pressure plate 25 is provided with through holes corresponding to and communicating with each limiting nut 254. After passing through the through holes by the threaded fit with the limiting nut 254, each limiting screw rod 253 performs limiting pressing on the key pressing plate 23 after reset.
[0025] Each key link 21 is rotatably connected to the frame 1 through a connecting component. The connecting component includes a plurality of connecting seats 11 uniformly arranged on the side wall of the frame 1 along the extending direction of the key link 21, connecting blocks 211 corresponding to each connecting seat 11 and connected to the key link 21, and a connecting shaft 212 arranged between the connecting seat 11 and the connecting block 211. At least two of the connecting seats 11 share a connecting shaft 212. Each connecting block 211 is rotatably connected to the corresponding connecting seat 11 through the connecting shaft 212, and each key link 21 is rotatably connected to the frame 1 through the rotational cooperation of each connecting block 211 with the connecting seat 11.
[0026] The key link plate 22 is fixed to the bottom of each key pressing plate 23. The oppositely arranged key link plates 22 and the corresponding key pressing plates 23 on the corresponding side are fixed to form a welding gap 3. Each key link plate 22 is provided with a guiding inclined surface 221. The guiding inclined surfaces 221 on the oppositely arranged key link plates 22 form a guiding groove communicating with the welding gap 3.
[0027] Working principle of the utility model: During the use of the utility model, the pipe to be processed is subjected to pressing and positioning at the bottom of the pipe through the previous process. Each key pressing plate 23 assembly 2 can press on both sides of the weld on the pipe synchronously or in sequence. During the pressing process, the air joint 250 is connected to an external air pump. After the air joint 250 is ventilated, the pressing airbag 24 is inflated. During the inflation and expansion of the pressing airbag 24, each key pressing plate 23 is pressed down. After welding is completed, each key pressing plate 23 is reset by the continuous force applied by the buffer spring 252 after the pressing airbag 24 deflates, and is limited by the cooperation of each limit nut 254 and limit screw 253. It can stably and quickly press on both sides of the weld on the pipe, solving the problems of deformation on both sides of the weld and deviation of the weld due to the action of internal stress on both sides of the weld during the welding process in the prior art. Through the synchronous pressing of each key pressing plate 23, the buffer spring 252 and the pressing airbag 24 cooperate to stably and firmly press on both sides of the weld. By pressing on both sides of the weld, the changes generated during welding of the weld are greatly reduced, and the stress generated is relieved, thereby ensuring the high efficiency and precision of the weld on the pipe. The structure is ingenious, convenient and efficient.
[0028] In the specific embodiments described above, the purpose, technical solutions and beneficial effects of the utility model have been further described in detail. It should be understood that the above description is only the specific embodiments of the utility model and is not used to limit the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. The piano key pressing plate mechanism for pipe welding has a frame; it is characterized in that: A key plate assembly is provided on the frame, which is oppositely arranged and can press and position the upper end of the pipe. A welding gap is provided between the oppositely arranged key plate assemblies. The key plate assembly includes a key link rotatably connected to the frame, a key link plate arranged parallel to the key link, a plurality of key plates evenly distributed along the extension direction of the key link, and a pressing airbag that can expand after being inflated. The two ends of each key plate are respectively fixedly connected to the key link and the key link plate. A limit pressing plate is also provided on the frame. The limit pressing plate is located between the frame and each key plate. The pressing airbag is arranged between the limit pressing plate and each key plate. An air joint for inflating the pressing airbag is provided on the limit pressing plate after being connected to an external air pump. A vertical limit link is provided at the upper end of each key plate. Each limit link passes through the limit pressing plate and is slidably connected to the limit pressing plate. A buffer spring is sleeved on each limit link. Each buffer spring is located at the upper end of the limit pressing plate. The two ends of each buffer spring act between the limit pressing plate and the corresponding limit link respectively. Each key plate presses the pipe after the pressing airbag is inflated, and is reset through the sliding cooperation between each limit link and the limit pressing plate and the continuous force application of the buffer spring after the pressing airbag deflates.
2. The key-type pressing plate mechanism for pipe welding according to claim 1, wherein: Installation blocks are provided oppositely on the bottom surface of the limit pressing plate. The two ends of the pressing airbag are fixed to the limit pressing plate through the installation blocks. Each key plate is arranged between the installation blocks.
3. The key pressing plate mechanism for pipe welding according to claim 2, characterized in that: Limit nuts are provided on both sides of each buffer spring. A limit screw adapted to the limit nut is provided on each limit nut. Through holes corresponding to and communicating with each limit nut are provided on the limit pressing plate. Each limit screw passes through the through hole through the threaded cooperation with the limit nut to limit and press the reset key plate.
4. The key pressing plate mechanism for pipe welding according to claim 3, characterized in that: Each key link is rotatably connected to the frame through a connection assembly. The connection assembly includes a plurality of connection seats evenly arranged on the side wall of the frame along the extension direction of the key link, connection blocks corresponding to each connection seat and connected to the key link, and a connection shaft arranged between the connection seat and the connection block. At least two of the connection seats share a connection shaft. Each connection block is rotatably connected to the corresponding connection seat through the connection shaft. Each key link is rotatably connected to the frame through the rotational cooperation between each connection block and the connection seat.
5. The key-type pressing plate mechanism for pipe welding according to claim 4, wherein: The key link plate is fixed to the bottom of each key plate. The oppositely arranged key link plates and the corresponding key plates on the corresponding side are fixed to form a welding gap. A guiding inclined surface is provided on each key link plate. The guiding inclined surfaces on the oppositely arranged key link plates form a guiding groove communicating with the welding gap.