A clamping device for high-frequency welded pipes

Abstract

This utility model discloses a clamping device for high-frequency welded pipes, including a clamping platform, a clamping main ring, a strip platform, and a step-by-step clamping unit for the welded pipe surface. During use, after the welded pipe is initially positioned by the main clamp, to further ensure its stability during welding, a linear slide rail is driven before welding begins. The linear slide rail, through an extension column, moves the strip plate towards the surface of the high-frequency welded pipe. When the secondary clamp at one end of the strip plate approaches the surface of the high-frequency welded pipe, the speed of the linear slide rail is reduced, causing the electrically driven rollers on one side of the secondary clamp to slowly contact the surface of the high-frequency welded pipe. Multiple sets of electrically driven rollers, through their heat-resistant rubber sleeves, provide multi-point clamping support for the high-frequency welded pipe, ensuring its stability during welding and further guaranteeing the welding stability of the high-frequency welded pipe.

Description

Technical Field

[0001] This utility model relates to the field of high-frequency welded pipe welding clamping technology, specifically a high-frequency welded pipe clamping device. Background Technology

[0002] High-frequency welded pipe is a type of steel pipe that is welded using resistance heat generated by high-frequency current. It is mainly used for low-pressure fluid transportation or manufacturing light industrial product components.

[0003] Definition and core characteristics of high-frequency welded pipe

[0004] High-frequency welded pipe is a steel pipe made by heating and melting the metal edges using the skin effect and proximity effect of high-frequency current (usually 10~500KHz) and applying pressure. The welding process does not require filler material and falls under the categories of induction welding or pressure contact welding.

[0005] Technical principle: Skin effect: High-frequency current is concentrated on the surface of the conductor, causing the edge of the steel pipe to heat up rapidly.

[0006] Proximity effect: Current flows in opposite directions between adjacent conductors, further concentrating heat in the welding area.

[0007] Core advantages: Fast welding speed: High production efficiency, suitable for continuous batch production.

[0008] Small heat-affected zone: good mechanical properties of the weld and small deformation.

[0009] It has wide material adaptability: it can weld thin-walled pipes and various metal pipes, and has low requirements for workpiece surface cleaning.

[0010] Applications and Classifications of High-Frequency Welded Pipes

[0011] Main applications: Low-pressure fluid transportation, such as water, oil, natural gas, etc.

[0012] Structural components: such as bushings in building, mechanical, and electrical installations.

[0013] Emerging fields: such as wind turbine towers, rail transportation, and marine engineering.

[0014] Common classifications: Ordinary welded pipe (clarinet): used for low-pressure fluid transportation.

[0015] Galvanized welded pipe (white pipe): for corrosion protection purposes.

[0016] Straight seam welded steel pipe: The weld seam is parallel to the longitudinal direction of the steel pipe.

[0017] Difference between high-frequency welded pipe and ordinary welded pipe

[0018] Welding method: High-frequency welded pipes are heated by high-frequency current, while ordinary welded pipes are mostly welded by electric arc welding or gas welding.

[0019] Strength and cost: High-frequency welded pipes have higher strength (weld length increased by 30%~100%) and lower environmental protection costs.

[0020] Raw materials: High-frequency welded pipes are mostly made of strip steel or coiled plate, while ordinary welded pipes are mainly made of steel plate.

[0021] High-frequency welded pipes have become an important type of welded steel pipe in modern industry due to their high efficiency, energy saving and stable quality, especially in thin-walled pipes and continuous production scenarios.

[0022] In the prior art, publication number "CN218591948U" discloses a clamping device for high-frequency welded pipes, including a base plate and a top plate. A lifting mechanism is fixedly connected to the top of the base plate and the bottom of the top plate. An adjustment mechanism is fixedly connected inside the lifting mechanism. The lifting mechanism includes a telescopic support plate, which is fixedly connected to the top of the base plate and the bottom of the top plate. A limit plate is fixedly connected to the front of the right telescopic support plate, and a motor is fixedly connected to the front of the limit plate. A worm gear is fixedly connected to the back of the motor, and a turbine is meshed with the left side of the worm gear. This clamping device for high-frequency welded pipes, by setting up a lifting mechanism and starting the motor, drives the worm gear to rotate within the limit plate. The worm gear drives two turbines to rotate in different directions in their original position. At this time, the turbines drive a rotating shaft to rotate within the telescopic support plate. The rotating shaft drives a gear to rotate, and the gear meshes with a toothed rack, causing the toothed rack to move and stretch the square groove, thus adjusting the height of the high-frequency welded pipe after clamping.

[0023] However, existing technologies still have significant shortcomings, such as:

[0024] In the aforementioned devices and existing technologies, high-frequency welded pipes are used to construct long-specification pipeline transportation systems through welding. During the welding process, it is necessary to reduce the shaking resonance caused by the long pipe diameter. If the pipeline shakes, the long pipe diameter will amplify the vibration, thereby affecting the welding effect of the high-frequency welded pipe. Utility Model Content

[0025] The purpose of this invention is to provide a clamping device for high-frequency welded pipes to solve the problems mentioned in the background art.

[0026] To achieve the above objectives, this utility model provides the following technical solution: a clamping device for high-frequency welded pipes, comprising a clamping platform, a clamping main ring, a strip platform, and a step-by-step clamping unit for the welded pipe surface. The clamping main ring is configured in two sets, and the two sets of clamping main rings are symmetrically installed in the top area of ​​the clamping platform. The strip platforms are distributed in a ring array on the surface of the clamping main ring. The step-by-step clamping unit for the welded pipe surface is disposed in the area of ​​the strip platform, and is used to achieve multi-point step-by-step clamping during the welding process of high-frequency welded pipes, so that they are in a stable state during hot-melt welding.

[0027] Preferably, the step-by-step clamping unit on the surface of the welded pipe includes a clamping part one, the clamping part one includes a main clamping seat, the main clamping seat is configured in six groups, the six groups of main clamping seats are arranged in a ring and installed in the inner cavity of the clamping main ring, the surface of the main clamping seat is provided with an installation inner cavity one, the interior of the installation inner cavity one is arc-shaped, and an electric drive wheel one is installed inside the installation inner cavity one, the electric drive wheel one is arranged in multiple groups at intervals.

[0028] Preferably, the step-by-step clamping unit on the welded pipe surface further includes a clamping part two, the clamping part two including a secondary clamping seat, a mounting cavity one is provided on one side of the clamping main ring, the mounting cavities one are arranged in a ring in five groups, the strip platform is embedded in the mounting cavity one, the surface of the strip platform is provided with a mounting cavity two, a linear slide rail is installed in the mounting cavity two, an extension column is installed on the moving end of the linear slide rail, a strip plate is installed on the extension column, and a secondary clamping seat is provided at one end of the strip plate.

[0029] Preferably, the surface of the sub-clamp is provided with a second mounting cavity, and multiple sets of electric drive wheels are arranged at intervals inside the second mounting cavity.

[0030] Preferably, the surface of the electric drive rotor is provided with a heat-resistant rubber sleeve layer.

[0031] Preferably, one surface of the electric drive wheel is provided with an anti-slip rubber sleeve layer.

[0032] Compared with the prior art, the beneficial effects of this utility model are:

[0033] 1. During use, the inner cavity of the clamping main ring is equipped with a main clamp seat. The main clamp seats are arranged in six rings and are evenly distributed. The inner cavity of the main clamp seat is equipped with horizontally distributed electric drive wheels. The electric drive wheels can achieve horizontal support for the tangential area of ​​the high-frequency welded pipe. At the same time, the surface of the electric drive wheels is covered with an anti-slip rubber sleeve layer, which can reduce the subsequent shaking problem of the high-frequency welded pipe after the welding position is determined, and ensure the welding stability of the high-frequency welded pipe.

[0034] 2. During use, after the welded pipe is initially positioned by the main clamp, in order to further ensure its stability during the welding process, before welding begins, a linear slide rail can be driven. The linear slide rail, through the extension column, moves the strip plate toward the surface of the high-frequency welded pipe. When the secondary clamp at one end of the strip plate approaches the surface of the high-frequency welded pipe, the moving speed of the linear slide rail is reduced, causing the electric drive rollers on one side of the secondary clamp to slowly come into contact with the surface of the high-frequency welded pipe. Multiple sets of electric drive rollers will use the heat-resistant rubber sleeve layer on their surface to achieve multi-point clamping and support of the high-frequency welded pipe, ensuring the stability of the high-frequency welded pipe during the welding process and further guaranteeing the welding stability of the high-frequency welded pipe. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall device of this utility model;

[0036] Figure 2 This is a schematic diagram of the clamping main ring part in this utility model;

[0037] Figure 3 This is a schematic diagram of the part of the present invention that includes the cavity 2, the linear slide rail, and the extension column;

[0038] Figure 4 This is a schematic diagram of the main clamp, the mounting cavity, and a portion of the electric drive wheel in this utility model;

[0039] Figure 5 This is a schematic diagram of the auxiliary clamp, the mounting cavity, and the electric drive wheel in this utility model.

[0040] In the diagram: 1. Clamping platform; 2. Clamping main ring; 21. Mounting cavity one; 3. Strip platform; 31. Mounting cavity two; 32. Linear slide rail; 33. Extension column; 4. Strip plate; 5. Main clamping seat; 51. Mounting inner cavity one; 52. Electric drive wheel one; 6. Sub-clamping seat; 61. Mounting inner cavity two; 62. Electric drive wheel two. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0042] Please see Figure 1-5 This utility model provides a technical solution:

[0043] Example 1: A clamping device for high-frequency welded pipes: including a clamping platform 1, a clamping main ring 2, a strip platform 3, and a step-by-step clamping unit on the surface of the welded pipe. The clamping main ring 2 is configured in two sets, and the two sets of clamping main rings 2 are symmetrically installed in the top area of ​​the clamping platform 1. The strip platform 3 is distributed in a ring array on the surface of the clamping main ring 2. The step-by-step clamping unit on the surface of the welded pipe is set in the area of ​​the strip platform 3, which is used to achieve multi-point step-by-step clamping during the welding process of high-frequency welded pipes, so that they are in a stable state during hot melting welding.

[0044] The welded pipe surface step-by-step clamping unit includes a clamping part one, which includes a main clamping seat 5. The main clamping seats 5 are configured in six groups, and the six groups of main clamping seats 5 are arranged in a ring and installed in the inner cavity of the clamping main ring 2. The surface of the main clamping seat 5 is provided with an installation inner cavity 51. The interior of the installation inner cavity 51 is arc-shaped, and an electric drive wheel 52 is installed inside the installation inner cavity 51. The electric drive wheel 52 is arranged in multiple groups at intervals.

[0045] The surface of the electric drive rotor 52 is provided with an anti-slip rubber sleeve layer.

[0046] In this embodiment, a main clamping seat 5 is installed in the inner cavity of the clamping main ring 2. The main clamping seats 5 are arranged in six groups in a ring shape, and the six groups of main clamping seats 5 are evenly distributed. Horizontally distributed electric drive rollers 52 are provided in the mounting cavity 51 on the surface of the main clamping seat 5. The electric drive rollers 52 can realize horizontal support for the tangential area of ​​the high-frequency welded pipe. At the same time, the surface of the electric drive rollers 52 is covered with an anti-slip rubber sleeve layer, which can reduce the subsequent shaking problem of the high-frequency welded pipe after the welding position is determined, and ensure the welding stability of the high-frequency welded pipe.

[0047] Example 2:

[0048] Based on Embodiment 1, this embodiment takes into account that since the high-frequency welded pipe is large in size and long in diameter, if it is fixed and clamped at a single point, it is impossible to avoid the interference of external shaking on the pipe during the welding of the high-frequency welded pipe. Therefore, this embodiment provides a clamping part 2 to avoid the above-mentioned problem.

[0049] The welded pipe surface step clamping unit also includes a clamping part two, which includes a secondary clamping seat 6. A mounting cavity 21 is provided on one side of the main clamping ring 2. The mounting cavities 21 are arranged in a ring in five groups. A strip platform 3 is embedded in the mounting cavity 21. A mounting cavity 31 is provided on the surface of the strip platform 3. A linear slide rail 32 is installed in the mounting cavity 31. An extension column 33 is installed on the moving end of the linear slide rail 32. A strip plate 4 is installed on the extension column 33. A secondary clamping seat 6 is provided at one end of the strip plate 4.

[0050] The surface of the auxiliary clamp 6 is provided with an inner cavity 61, and multiple sets of electric drive wheels 62 are arranged at intervals inside the inner cavity 61.

[0051] The surface of the electric drive rotor 262 is provided with a heat-resistant rubber sleeve layer.

[0052] In this embodiment, by driving the linear slide rail 32, the linear slide rail 32 drives the strip plate 4 to move and unfold toward the surface of the high-frequency welded pipe through the extension column 33. When the sub-clamp 6 at one end of the strip plate 4 approaches the surface of the high-frequency welded pipe, the moving speed of the linear slide rail 32 is reduced so that the electric drive roller 62 on one side of the sub-clamp 6 slowly fits into the surface of the high-frequency welded pipe. Multiple sets of electric drive rollers 62 will achieve multi-point clamping and support of the high-frequency welded pipe through the heat-resistant rubber sleeve layer on their surface, so as to ensure the stability of the high-frequency welded pipe during the welding process and further ensure the welding stability of the high-frequency welded pipe.

[0053] Working principle: The operator selects the high-frequency welded pipe raw material to be welded, then pre-processes the welding area of ​​the high-frequency welded pipe, and then calibrates the positions of the two sets of clamping platforms 1. The clamping platforms 1 are calibrated with a level to make the inner cavities of the two sets of clamping platforms 1 concentric, so that the two sets of high-frequency welded pipes are concentrically aligned during the welding process. After calibration, the current state of the two sets of clamping platforms 1 is locked, and then the positions of the two sets of high-frequency welded pipes are centered and aligned. After the above steps are completed, the welding step of the high-frequency welded pipe begins. The metal connection of the two sets of welded pipes is achieved through the skin effect and proximity effect of the high-frequency current. The concentricity of the inner cavities of the two sets of clamping platforms 1 ensures the stable welding state and uniform weld of the welded pipe.

[0054] After the inner cavities of the two sets of clamping platforms 1 are concentrically aligned, the welded pipe is loaded. The welded pipe is inserted from one set of clamping main rings 2 at the top of the clamping platform 1 into another set of clamping main rings 2. The two pairs of clamping main rings 2 can realize multi-segment clamping and positioning of a single high-frequency welded pipe. The main clamping seat 5 is installed in the inner cavity of the clamping main ring 2. The main clamping seat 5 is arranged in six rings. The six sets of main clamping seats 5 are evenly distributed. The mounting inner cavity 51 on the surface of the main clamping seat 5 is provided with horizontally distributed electric drive rollers 52. The electric drive rollers 52 can realize horizontal support for the tangential area of ​​the high-frequency welded pipe. At the same time, the surface of the electric drive rollers 52 is covered with an anti-slip rubber sleeve layer, which can reduce the subsequent shaking problem of the high-frequency welded pipe after the welding position is determined, and ensure the welding stability of the high-frequency welded pipe.

[0055] After the welded pipe is initially positioned by the main clamp 5, in order to further ensure its stability during the welding process, before welding begins, the linear slide rail 32 is driven. The linear slide rail 32 drives the strip plate 4 to move and unfold toward the surface of the high-frequency welded pipe through the extension column 33. When the auxiliary clamp 6 at one end of the strip plate 4 approaches the surface of the high-frequency welded pipe, the moving speed of the linear slide rail 32 is reduced, so that the electric drive roller 62 on one side of the auxiliary clamp 6 slowly fits into the surface of the high-frequency welded pipe. Multiple sets of electric drive rollers 62 will achieve multi-point clamping and support of the high-frequency welded pipe through the heat-resistant rubber sleeve layer on their surface, so as to ensure the stability of the high-frequency welded pipe during the welding process and further ensure the welding stability of the high-frequency welded pipe.

[0056] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A clamping device for high frequency pipe welding, characterized in that: It includes a clamping platform (1), a clamping main ring (2), a strip platform (3), and a step-by-step clamping unit on the surface of the welded pipe. The clamping main ring (2) is set in two sets, and the two sets of clamping main rings (2) are symmetrically installed in the top area of ​​the clamping platform (1). The strip platform (3) is distributed in a ring array on the surface of the clamping main ring (2). The step-by-step clamping unit on the surface of the welded pipe is set in the area of ​​the strip platform (3) to achieve multi-point step-by-step clamping during the welding process of high-frequency welded pipe, so that it is in a stable state during hot melting welding.

2. A pipe clamping device for high frequency pipe welding according to claim 1, characterized in that: The welded pipe surface step clamping unit includes a clamping part one, the clamping part one includes a main clamping seat (5), the main clamping seat (5) is configured as six groups, the six groups of main clamping seats (5) are arranged in a ring and installed in the inner cavity of the clamping main ring (2), the surface of the main clamping seat (5) is provided with an installation inner cavity one (51), the interior of the installation inner cavity one (51) is arc-shaped, the installation inner cavity one (51) is installed with an electric drive wheel one (52), the electric drive wheel one (52) is arranged in multiple groups at intervals.

3. A pipe clamping device for high frequency pipe welding according to claim 2, characterized in that: The welded pipe surface step clamping unit also includes a clamping part two, which includes a secondary clamping seat (6). A mounting cavity one (21) is provided on one side of the clamping main ring (2). The mounting cavities one (21) are arranged in a ring as five groups. The strip platform (3) is embedded in the mounting cavity one (21). A mounting cavity two (31) is provided on the surface of the strip platform (3). A linear slide rail (32) is installed in the mounting cavity two (31). An extension column (33) is installed on the moving end of the linear slide rail (32). A strip plate (4) is installed on the extension column (33). A secondary clamping seat (6) is provided at one end of the strip plate (4).

4. A pipe clamping device for high frequency pipe welding according to claim 3, characterized in that: The surface of the sub-clamp (6) is provided with an inner cavity (61), and multiple sets of electric drive wheels (62) are arranged at intervals inside the inner cavity (61).

5. A pipe clamping device for high frequency pipe welding according to claim 4, characterized in that: The surface of the electric drive rotor (62) is provided with a heat-resistant rubber sleeve layer.

6. A high-frequency electric pipe welding clamping device according to claim 2, characterized in that: The surface of the electric drive wheel (52) is provided with an anti-slip rubber sleeve layer.

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