A welding tool for thermocouple protection tube and flange

Abstract

The utility model relates to welding frock technical field discloses a kind of welding frock of thermocouple protection tube and flange, and welding frock is used to weld thermocouple protection tube and flange, and welding frock includes base and fixed assembly, fixed assembly includes first mounting bracket, second mounting bracket, two three-jaw chucks, support seat and expansion block, and first mounting bracket and second mounting bracket are all set in the upper end of base;Two three-jaw chucks are rotatably connected in first mounting bracket and second mounting bracket respectively, and two three-jaw chucks are coaxially arranged, and two three-jaw chucks are respectively used to fix thermocouple protection tube and flange;Support seat is slidably connected to base along the axis direction of three-jaw chuck, and the upper end of support seat is provided with opening.This utility model is clamped by two coaxial three-jaw chucks thermocouple protection tube and flange respectively, guaranteeing that both are coaxially aligned, and cooperating liftable expansion block carries out middle support to long protection tube, prevent protection tube circumferential deflection in welding process.

Description

Technical Field

[0001] This utility model relates to the field of welding tooling technology, and more specifically, to a welding tooling for a thermocouple protection tube and a flange. Background Technology

[0002] Thermocouples are one of the temperature sensors used in industrial temperature measurement. In high-temperature, high-pressure, or corrosive working conditions such as metallurgy, chemical industry, power, and aerospace, the temperature measuring end of the thermocouple usually needs to be fitted with a protective tube made of metal or ceramic material to isolate the thermocouple wire from the corrosion and mechanical damage caused by the measured medium. To facilitate the installation and sealing of the thermocouple, the protective tube usually needs to be welded with a flange, and the flange is fixedly connected to the equipment wall or pipe interface.

[0003] The welding of existing protective pipes and flanges is mostly done manually, relying on the operator's experience for alignment and fixation. The alignment accuracy is limited, and the welding thermal deformation can easily cause the workpiece to shift, making it difficult to stably ensure the perpendicularity and coaxiality of the protective pipe and flange. This results in uneven welds, poor product consistency, and difficulty in meeting the sealing and installation requirements of industrial temperature measurement scenarios. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0005] Therefore, this utility model proposes a welding fixture for welding thermocouple protection tubes and flanges. The welding fixture is used to weld thermocouple protection tubes and flanges and includes a base and a fixing component.

[0006] The fixing assembly includes a first mounting bracket, a second mounting bracket, two three-jaw chucks, a support base, and a telescopic block. The first and second mounting brackets are both located at the upper end of the base. The two three-jaw chucks are rotatably connected to the first and second mounting brackets, respectively, and are coaxially arranged. The two three-jaw chucks are used to fix the thermocouple protection tube and the flange, respectively. The support base is slidably connected to the base along the axial direction of the three-jaw chucks, and has an opening at its upper end. The support base is located between the first and second mounting brackets. The telescopic block is slidably fitted to the support base and is used to support the thermocouple protection tube.

[0007] Furthermore, the upper end of the telescopic block is provided with a V-shaped groove for limiting the thermocouple protection tube, and the side wall of the telescopic block is provided with a fixing groove. The bottom wall of the fixing groove is provided with a friction surface. The fixing assembly also includes several rollers and positioning screws. The rollers are rotatably connected in the V-shaped groove, and the axis of the rollers is consistent with the axis of the three-jaw chuck, which is used to support the thermocouple protection tube. The positioning screws are threaded to the support base, and the end of the positioning screws near the fixing groove abuts against the friction surface.

[0008] Furthermore, the welding fixture also includes a drive assembly, which includes two first motors, a slide rail, a first slider, and a second slider. The two first motors are respectively fixed to a first mounting bracket and a second mounting bracket, and the output ends of the two first motors are respectively connected to two three-jaw chucks. The slide rail is fixed to the upper end face of the base, and the extension direction of the slide rail is consistent with the axial direction of the three-jaw chuck. The first slider is slidably engaged with the slide rail, and the first mounting bracket is fixed to the upper end face of the first slider. The second slider is slidably engaged with the slide rail, and the support base is fixed to the upper end face of the second slider.

[0009] Furthermore, the drive assembly also includes a second motor, a drive screw, and a threaded block. The second motor is fixed to the base; the drive screw is keyed to the output end of the second motor; the threaded block is threaded to the drive screw and is fixedly connected to the first slider.

[0010] Furthermore, the welding fixture also includes a welding assembly, which includes a flexible arm and a welding torch. One end of the flexible arm is fixed to the base; the welding torch is fixed to the end of the flexible arm away from the base and is used to weld the thermocouple protection tube to the flange.

[0011] Furthermore, the second mounting bracket is fixed to the upper surface of the base.

[0012] This utility model provides a welding fixture for thermocouple protection tubes and flanges. In use, the flange is first clamped onto a three-jaw chuck on a second mounting bracket, and the thermocouple protection tube is clamped onto a three-jaw chuck on a first mounting bracket. Since the two three-jaw chucks are coaxial, the axes of the protection tube and flange are aligned. The second motor is started, driving the drive screw to rotate, which in turn moves the threaded block and the first slider along the slide rail, bringing the first mounting bracket closer to the second mounting bracket until the welding ends of the protection tube and flange are aligned. Then, the second slider slides along the slide rail, moving the support base to below the middle of the protection tube. The extension height of the telescopic block within the support base is then adjusted so that the V-groove at the upper end of the telescopic block supports the protection tube. The rollers within the V-groove and the outer surface of the protection tube... The wall contacts the support, and the positioning screw is tightened so that its end abuts against the friction surface in the fixing groove, locking the height of the telescopic block. This forms an intermediate support for the slender protective tube before welding, preventing the protective tube from swaying during subsequent rotation. Then, the flexible arm is adjusted, and the welding torch is aligned with the circumferential seam between the protective tube and the flange. The two first motors are started simultaneously, driving the two three-jaw chucks to rotate in the same direction and at the same speed, causing the protective tube and the flange to rotate synchronously. The welding torch is fixed in place, and the continuous automatic welding of the entire circumferential seam can be completed. During the rotation of the protective tube, the roller in the V-groove rolls synchronously with the protective tube, converting the sliding friction between the protective tube and the telescopic block into rolling friction. This reduces rotational resistance, ensures smooth rotation, and avoids scratches on the outer wall of the protective tube.

[0013] Additional aspects and advantages of this 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

[0014] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model; Figure 2 This is a schematic diagram of the drive component structure in one embodiment of the present invention; Figure 3 This is a partial structural diagram of the driving component in one embodiment of the present invention; Figure 4 This is a schematic diagram of the fixing component structure in one embodiment of the present invention.

[0015] in, Figures 1 to 4 The correspondence between the reference numerals and component names in the attached drawings is as follows: 100. Base; 200. Fixing component; 210. First mounting bracket; 220. Second mounting bracket; 230. Three-jaw chuck; 240. Support base; 250. Telescopic block; 260. V-groove; 270. Idler roller; 280. Fixing groove; 290. Positioning screw; 300. Drive assembly; 310. First motor; 320. Slide rail; 330. First slider; 340. Second slider; 350. Second motor; 360. Drive screw; 370. Threaded block; 400. Welding assembly; 410. Flexible arm; 420. Welding torch. Detailed Implementation

[0016] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0017] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0018] Please see Figures 1 to 4 A welding fixture for welding thermocouple protection tubes and flanges is provided. The welding fixture includes a base 100 and a fixing component 200.

[0019] The fixing assembly 200 includes a first mounting bracket 210, a second mounting bracket 220, two three-jaw chucks 230, a support base 240, and a telescopic block 250. The first mounting bracket 210 and the second mounting bracket 220 are both disposed on the upper end of the base 100. The two three-jaw chucks 230 are rotatably connected to the first mounting bracket 210 and the second mounting bracket 220, respectively, and are coaxially arranged. The two three-jaw chucks 230 are used to fix the thermocouple protection tube and the flange, respectively. The support base 240 is slidably connected to the base 100 along the axial direction of the three-jaw chucks 230, and has an opening at its upper end. The support base 240 is disposed between the first mounting bracket 210 and the second mounting bracket 220. The telescopic block 250 is slidably fitted to the support base 240 and is used to support the thermocouple protection tube.

[0020] In this embodiment: The first mounting bracket 210 and the second mounting bracket 220 are both located at the upper end of the base 100; the first mounting bracket 210 and the second mounting bracket 220 provide rotational support for the two three-jaw chucks 230 respectively.

[0021] Two three-jaw chucks 230 are rotatably connected to the first mounting bracket 210 and the second mounting bracket 220, respectively, and the two three-jaw chucks 230 are coaxially arranged. The two three-jaw chucks 230 are used to fix the thermocouple protection tube and the flange, respectively. The coaxial arrangement of the two three-jaw chucks 230 can ensure that the clamped protection tube and the flange have the same axis of rotation, and ensure that the perpendicularity of the flange and the protection tube after welding meets the installation requirements.

[0022] The support base 240 is slidably connected to the base 100 along the axial direction of the three-jaw chuck 230, and the upper end of the support base 240 is provided with an opening. The support base 240 is located between the first mounting bracket 210 and the second mounting bracket 220. The support base 240 can slide to a suitable support position according to the length of the protective tube, and the upper end opening structure provides space for the lifting and sliding of the telescopic block 250.

[0023] The telescopic block 250 is slidably fitted to the support base 240 and is used to support the thermocouple protection tube. The telescopic block 250 can slide up and down along the vertical opening of the support base 240 to adjust the support height and provide upward support force to the middle part of the slender protection tube.

[0024] Please see Figure 4In some embodiments of this utility model, the upper end of the telescopic block 250 is provided with a V-shaped groove 260 for limiting the thermocouple protection tube, and the side wall of the telescopic block 250 is provided with a fixing groove 280. The bottom wall of the fixing groove 280 is provided with a friction surface. The fixing assembly 200 also includes several rollers 270 and a positioning screw 290. The rollers 270 are rotatably connected in the V-shaped groove 260. The axial direction of the rollers 270 is consistent with the axial direction of the three-jaw chuck 230 and is used to support the thermocouple protection tube. The positioning screw 290 is threadedly connected to the support base 240, and the end of the positioning screw 290 near the fixing groove 280 abuts against the friction surface.

[0025] In this embodiment: The upper end of the telescopic block 250 is provided with a V-shaped groove 260 for limiting the thermocouple protection tube. The side wall of the telescopic block 250 is provided with a fixing groove 280, and the bottom wall of the fixing groove 280 is provided with a friction surface. The V-shaped groove 260 restricts the protection tube and prevents the axis of the protection tube from shifting after support. The friction surface increases the friction force by increasing the roughness of the contact surface, so that the telescopic block 250 is not easy to loosen or slip after the positioning screw 290 is tightened.

[0026] The idler roller 270 is rotatably connected within the V-groove 260. The axial direction of the idler roller 270 is consistent with the axial direction of the three-jaw chuck 230, and it is used to support the thermocouple protection tube. The idler roller 270 can rotate freely around its own axis. When the protection tube rotates around its own axis under the drive of the three-jaw chuck 230, the idler roller 270 rolls synchronously with the protection tube, converting sliding friction into rolling friction, reducing rotational resistance, and ensuring smooth rotation.

[0027] The positioning screw 290 is threaded to the support base 240, and the end of the positioning screw 290 near the fixing groove 280 abuts against the friction surface; by turning the positioning screw 290, its end can press or loosen the friction surface in the fixing groove 280, thereby locking the position of the telescopic block 250 after the height adjustment is completed, ensuring stable and reliable support.

[0028] Please see Figure 1 In some embodiments of this utility model, the welding fixture further includes a drive assembly 300, which includes two first motors 310, a slide rail 320, a first slider 330, and a second slider 340. The two first motors 310 are respectively fixed to the first mounting bracket 210 and the second mounting bracket 220, and the output ends of the two first motors 310 are respectively keyed to the two three-jaw chucks 230. The slide rail 320 is fixed to the upper end face of the base 100, and the extension direction of the slide rail 320 is consistent with the axial direction of the three-jaw chuck 230. The first slider 330 is slidably engaged with the slide rail 320, and the first mounting bracket 210 is fixed to the upper end face of the first slider 330. The second slider 340 is slidably engaged with the slide rail 320, and the support base 240 is fixed to the upper end face of the second slider 340.

[0029] In this embodiment: Two first motors 310 are fixed to the first mounting bracket 210 and the second mounting bracket 220 respectively, and the output ends of the two first motors 310 are keyed to the two three-jaw chucks 230 respectively. The first motors 310 provide power for the rotation of the three-jaw chucks 230. Both first motors 310 are electrically connected to the same controller and operate synchronously in the same direction and at the same speed under the control of the controller. This can drive the protective tube and the flange to rotate synchronously, so that there is no relative rotation between the two during the welding process, thus ensuring the continuity and uniformity of the circumferential weld.

[0030] The slide rail 320 is fixed to the upper surface of the base 100, and the extension direction of the slide rail 320 is consistent with the axial direction of the three-jaw chuck 230; the slide rail 320 provides linear guidance for the first slider 330 and the second slider 340.

[0031] The first slider 330 is slidably fitted to the slide rail 320, and the first mounting bracket 210 is fixed to the upper end face of the first slider 330. The first mounting bracket 210 can move axially along the slide rail 320 through the first slider 330, thereby adjusting the distance between the first mounting bracket 210 and the second mounting bracket 220 to accommodate thermocouple protection tubes of different lengths, and drive the protection tube to feed towards the flange during welding to achieve docking.

[0032] The second slider 340 is slidably fitted to the slide rail 320, and the support seat 240 is fixed to the upper end face of the second slider 340; the support seat 240 can move independently along the slide rail 320 via the second slider 340.

[0033] Please see Figure 3 In some embodiments of this utility model, the drive assembly 300 further includes a second motor 350, a drive screw 360, and a threaded block 370. The second motor 350 is fixed to the base 100; the drive screw 360 is keyed to the output end of the second motor 350; the threaded block 370 is threaded to the drive screw 360, and the threaded block 370 is fixedly connected to the first slider 330.

[0034] In this embodiment: The second motor 350 is fixed to the base 100; it provides a power source for the axial movement of the first mounting bracket 210.

[0035] The drive screw 360 is keyed to the output end of the second motor 350; when the second motor 350 rotates, it drives the drive screw 360 to rotate synchronously.

[0036] The threaded block 370 is threadedly connected to the drive screw 360, and the threaded block 370 is fixedly connected to the first slider 330.

[0037] Please see Figure 1In some embodiments of this utility model, the welding fixture further includes a welding assembly 400, which includes a flexible arm 410 and a welding torch 420. One end of the flexible arm 410 is fixed to the base 100; the welding torch 420 is fixed to the end of the flexible arm 410 away from the base 100 and is used to weld the thermocouple protection tube to the flange.

[0038] In this embodiment: One end of the flexible arm 410 is fixed to the base 100; the flexible arm 410 can freely adjust the position and posture of its end within the space, making it convenient for welding personnel to operate.

[0039] The welding torch 420 is fixed to the end of the flexible arm 410 away from the base 100 and is used to weld the thermocouple protection tube to the flange.

[0040] Please see Figure 1 In some embodiments of this utility model, the second mounting bracket 220 is fixed to the upper end surface of the base 100.

[0041] In this embodiment: The second mounting bracket 220 is fixed to the upper surface of the base 100.

[0042] In the claims, description, and accompanying drawings of this utility model, the term "plural" refers to two or more objects. Unless otherwise explicitly defined, the terms "upper," "lower," 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 this utility model and simplifying the description process, and are not intended to indicate or imply that the device or element referred to must have the described specific orientation, or be constructed and operated in a specific orientation. Therefore, these descriptions should not be construed as limitations on this utility model. The terms "connect," "install," "fix," etc., should be interpreted broadly. For example, "connect" can be a fixed connection between multiple objects, a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects or an indirect connection between multiple objects through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood based on the specific circumstances described above.

[0043] In the claims, description, and drawings of this utility model, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In the claims, description, and drawings of this utility model, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A welding fixture for a thermocouple protection tube and a flange, characterized in that, The welding fixture is used for welding thermocouple protection tubes and flanges. The welding fixture includes: Base (100); The fixing component (200) includes a first mounting bracket (210), a second mounting bracket (220), two three-jaw chucks (230), a support base (240), and a telescopic block (250). The first mounting bracket (210) and the second mounting bracket (220) are both disposed at the upper end of the base (100); The two three-jaw chucks (230) are rotatably connected to the first mounting bracket (210) and the second mounting bracket (220) respectively, and the two three-jaw chucks (230) are coaxially arranged. The two three-jaw chucks (230) are used to fix the thermocouple protection tube and the flange respectively. The support base (240) is slidably connected to the base (100) along the axial direction of the three-jaw chuck (230), and the upper end of the support base (240) is open. The support base (240) is disposed between the first mounting bracket (210) and the second mounting bracket (220). The telescopic block (250) is slidably fitted to the support base (240), and the telescopic block (250) is used to support the thermocouple protection tube.

2. The welding fixture for the thermocouple protection tube and flange according to claim 1, characterized in that, The upper end of the telescopic block (250) is provided with a V-shaped groove (260) for limiting the thermocouple protection tube. The side wall of the telescopic block (250) is provided with a fixing groove (280). The bottom wall of the fixing groove (280) is provided with a friction surface. The fixing assembly (200) further includes: Several idler rollers (270) are rotatably connected in the V-groove (260). The axial direction of the idler rollers (270) is consistent with the axial direction of the three-jaw chuck (230) and is used to support the thermocouple protection tube. A positioning screw (290) is threaded to the support base (240), and one end of the positioning screw (290) near the fixing groove (280) abuts against the friction surface.

3. The welding fixture for the thermocouple protection tube and flange according to claim 1, characterized in that, The welding fixture also includes: The drive assembly (300) includes two first motors (310), a slide rail (320), a first slider (330), and a second slider (340). The two first motors (310) are respectively fixed to the first mounting bracket (210) and the second mounting bracket (220), and the output ends of the two first motors (310) are respectively connected to the two three-jaw chucks (230); The slide rail (320) is fixed to the upper end face of the base (100), and the extension direction of the slide rail (320) is consistent with the axial direction of the three-jaw chuck (230). The first slider (330) is slidably engaged with the slide rail (320), and the first mounting bracket (210) is fixed to the upper end face of the first slider (330); The second slider (340) is slidably engaged with the slide rail (320), and the support base (240) is fixed to the upper end face of the second slider (340).

4. The welding fixture for the thermocouple protection tube and flange according to claim 3, characterized in that, The drive component (300) also includes: The second motor (350) is fixed to the base (100); A drive screw (360) is keyed to the output end of the second motor (350); A threaded block (370) is threadedly connected to the drive screw (360), and the threaded block (370) is fixedly connected to the first slider (330).

5. The welding fixture for the thermocouple protection tube and flange according to claim 1, characterized in that, The welding fixture also includes: Welding assembly (400), the welding assembly (400) includes a flexible arm (410) and a welding torch (420); One end of the flexible arm (410) is fixed to the base (100). The welding torch (420) is fixed to one end of the flexible arm (410) away from the base (100) and is used to weld the thermocouple protection tube to the flange.

6. The welding fixture for the thermocouple protection tube and flange according to claim 1, characterized in that, The second mounting bracket (220) is fixed to the upper surface of the base (100).

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