Butt welding device for boiler pipe

Abstract

The utility model provides a kind of boiler pipe butt joint welding device, to solve the problem of low precision, easy to damage pipe port and poor adaptability in prior art. The device includes V-shaped support block, compression assembly, symmetrically arranged spacing adjustment assembly, rotating assembly and buffer assembly. V-shaped support block realizes the automatic centering and stable support of boiler pipe, and compression assembly firmly fixes the pipe fitting by pneumatic lever mechanism. The spacing adjustment assembly is composed of guide rail, sliding block, slide plate, adjusting motor and screw rod, and can electrically adjust the spacing of the rotating assembly on both sides to adapt to different specifications of pipe fitting. The rotating assembly includes rotating motor and coupling, and drives the boiler pipe to rotate and weld. During butt joint, one end is rigidly pushed, and the other end is elastically buffered, effectively absorbing impact force, preventing pipe end damage and ensuring smooth and accurate butt joint. The device realizes the automation, high precision and flexible operation of boiler pipe butt joint, and improves the welding quality and production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of welding equipment technology, and in particular to a boiler tube butt welding device. Background Technology

[0002] In the boiler manufacturing and installation process, the butt welding of boiler tubes is one of the key processes, and its precision and welding quality directly affect the boiler's safety and operating efficiency. Traditional boiler tube butt welding often relies on manual support or simple clamps for fixation, which leads to problems such as poor coaxiality and unstable welding positioning. Especially during spot welding and rotary welding, the tubes are susceptible to axial impact, causing end face damage or misalignment, affecting weld quality. Furthermore, existing equipment is often inconvenient to adjust for boiler tubes of different specifications, has poor adaptability, and struggles to achieve automated, high-precision butt welding operations. Utility Model Content

[0003] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a boiler tube butt welding device to solve the problems of unstable welding positioning and inability to apply to boiler tubes of different specifications in the prior art.

[0004] To achieve the above and other related objectives, this utility model provides the following technical solution:

[0005] A boiler tube butt welding device includes: a V-shaped support block for placing the boiler tube; a clamping assembly for pressing the boiler tube onto the V-shaped support block; a spacing adjustment assembly symmetrically arranged on both sides of the clamping assembly; a rotating assembly disposed on the spacing adjustment assembly and used to abut the end of the boiler tube; and a buffer assembly disposed on one of the rotating assemblies.

[0006] To achieve the above technical solution, the boiler tube butt welding device first places the two boiler tubes to be butt-welded, achieving automatic centering and stable support through V-shaped support blocks. Then, a clamping assembly firmly fixes the boiler tubes to the support blocks, ensuring no displacement occurs during spot welding and subsequent welding processes. Next, the operator precisely adjusts the distance between the two rotating components by adjusting symmetrically arranged spacing adjustment components to accommodate boiler tubes of different diameters and ensure accurate end-to-end contact. After completing the above steps, spot welding is performed, with preliminary welding done at several evenly distributed points on the circumference of the boiler tube butt joint to fix the positional relationship between the two tubes. After spot welding is completed, the rotating components are activated to perform a complete circumferential welding. During this process, a buffer assembly absorbs any axial impact forces that may affect the welding quality, ensuring a smooth and precise welding process.

[0007] In one embodiment of the present invention, the clamping assembly includes a clamping cylinder, a hinge rod hinged to the body of the clamping cylinder, a pressure rod with one end hinged to the output shaft of the clamping cylinder and the middle hinged to the hinge rod, and a pressure arm disposed on the pressure rod and located above the V-shaped support block.

[0008] To achieve the above technical solution, when the clamping assembly is working, the clamping cylinder is activated, and its output shaft generates axial thrust. This thrust acts directly on one end of the pressure rod, which is hinged to it. Simultaneously, the hinge rod on the clamping cylinder body and the middle of the pressure rod form a linkage structure, constituting a lever-based force-amplifying mechanism. When the cylinder output shaft extends, the lever action of the pressure rod causes the pressure arm located above the V-shaped support block to swing downwards, thereby firmly clamping the boiler tube placed on the V-shaped support block. When the cylinder retracts, the pressure arm returns to its original position under the action of the hinge structure, releasing the boiler tube and facilitating the loading and unloading of the workpiece. This structure utilizes cylinder drive and double hinge linkage to achieve stable and reliable clamping and releasing actions.

[0009] In one embodiment of the present invention, the spacing adjustment assembly includes a guide rail arranged along the axial direction of the boiler tube, a slider slidably arranged on the guide rail, a slide plate located on the slider, an adjustment motor, and a lead screw arranged at the output end of the adjustment motor and threadedly connected to the slide plate and arranged parallel to the guide rail.

[0010] To achieve the above technical solution, the spacing adjustment component uses a motor drive to achieve automated precision adjustment. When it is necessary to adjust the distance between the two rotating components to accommodate boiler tubes of different lengths, the motor starts, and the lead screw at its output end rotates accordingly. Since the lead screw is threadedly connected to the slide plate, and the support directions at both ends of the lead screw are parallel to the guide rail, the rotational motion of the lead screw is converted into the linear reciprocating motion of the slide plate along the guide rail. The slider cooperates with the guide rail to provide stable guidance and support for the slide plate, ensuring smooth and deflection-free movement. The slide plate drives the rotating components on it to move synchronously, thereby precisely adjusting the distance between the two rotating components and achieving precise control of the positioning and docking pressure of boiler tubes of different specifications.

[0011] In one embodiment of the present invention, the rotating assembly includes a rotary motor disposed on the slide plate and a coupling disposed at the output end of the rotary motor.

[0012] To achieve the above technical solution, the rotating assembly is driven by a rotary motor mounted on a sliding plate. The rotary motor activates when docking or welding operations on the boiler tubes are required. The output end of the rotary motor is connected to a subsequent device for clamping the boiler tubes via a coupling. The coupling serves to connect and transmit torque, ensuring that the power from the rotary motor is smoothly and efficiently transmitted to the boiler tubes.

[0013] In one embodiment of the present invention, one of the couplings is provided with an abutment block, and the other coupling is provided with the buffer assembly; the buffer assembly includes a buffer rod, a buffer sleeve sleeved on the buffer rod, and a buffer spring located in the inner cavity of the buffer sleeve and abutting against the end of the buffer rod.

[0014] To achieve the above technical solution, the ends of the two boiler tubes need to make smooth and precise contact during the tube docking process. In this device, one coupling is equipped with an abutment block for directly pushing the end of one boiler tube, achieving axial positioning and pushing; the other coupling is equipped with a buffer assembly. This buffer assembly consists of a buffer rod, a buffer sleeve, and a buffer spring. The buffer rod is axially extendable within the buffer sleeve, and its end abuts against the inner cavity of the buffer sleeve via a built-in buffer spring. This structure, with rigid pushing at one end and elastic buffering at the other, ensures gentle force distribution during the docking process, preventing end-face damage and ensuring a smooth and precise docking.

[0015] In one embodiment of the present invention, the portion of the buffer rod located in the buffer sleeve is provided with a stop groove along the circumference, and a stop pin located in the stop groove passes through the buffer sleeve.

[0016] To achieve the above technical solution, in the buffer assembly, the portion of the buffer rod located inside the buffer sleeve has a circumferentially circumferentially shaped stop groove, and a stop pin passes through the buffer sleeve, with the stop pin located within the stop groove. When an axial impact force is generated during the boiler tube connection process, the buffer rod moves backward along the inner cavity of the buffer sleeve, compressing the buffer spring to absorb the impact energy. At this time, the stop pin interacts with the stop groove, restricting the movement of the buffer rod in any direction other than axial movement, ensuring that the buffer rod can only perform telescopic movement along a predetermined axial path. This design not only ensures stability during the buffering process but also prevents possible deflection or detachment of the buffer rod, ensuring the reliability and accuracy of the buffer assembly throughout the entire operation.

[0017] As described above, the boiler tube butt welding device of this utility model has the following beneficial effects: This utility model significantly improves the butt welding accuracy and welding quality. Stable clamping is achieved through the cooperation of V-shaped support blocks and clamping components; the spacing adjustment component can automatically adapt to different tube lengths to ensure alignment; the structure of rigid contact on one side and spring buffer on the other side effectively absorbs the butt welding impact and protects the tube ends; and a rotary motor enables smooth circumferential welding. The coordinated work of all components realizes the automation, precision, and flexibility of the boiler tube butt welding process, not only improving production efficiency and welding yield but also enhancing the equipment's versatility and operational safety, making it suitable for high-quality welding requirements of various specifications of boiler tubes. Attached Figure Description

[0018] Figure 1The image shown is a top view of this utility model.

[0019] Figure 2 The image shown is a side view of this utility model.

[0020] Figure 3 The diagram shows the structure of the clamping assembly.

[0021] Figure 4 The diagram shows the structure of the buffer component.

[0022] Component designation explanation

[0023] 1. Boiler tube; 2. V-shaped support block; 3. Clamping cylinder; 4. Hinge rod; 5. Pressure rod; 6. Pressure arm; 7. Guide rail; 8. Slider; 9. Slide plate; 10. Adjusting motor; 11. Lead screw; 12. Rotary motor; 13. Coupling; 14. Abutment block; 15. Buffer assembly; 151. Buffer rod; 152. Buffer sleeve; 153. Buffer spring; 154. Stop groove; 155. Stop pin. Detailed Implementation

[0024] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. It should be noted that, unless otherwise specified, the following embodiments and features can be combined with each other.

[0025] Please see Figures 1 to 4 This utility model provides a boiler tube butt welding device, including a V-shaped support block 2 for placing a boiler tube 1; a pressing component for pressing the boiler tube 1 onto the V-shaped support block 2; a spacing adjustment component symmetrically arranged on both sides of the pressing component; a rotating component arranged on the spacing adjustment component and used to abut the end of the boiler tube 1; and a buffer component 15 arranged on one of the rotating components.

[0026] The boiler tube butt welding device first places the two boiler tubes 1 to be butt welded, achieving automatic centering and stable support through V-shaped support blocks 2. Then, a clamping assembly securely fixes the boiler tubes 1 to the support blocks, ensuring no displacement occurs during spot welding and subsequent welding. Next, the operator precisely adjusts the distance between the two rotating components by adjusting symmetrically arranged spacing adjustment components to accommodate boiler tubes 1 of different diameters and ensure accurate end-to-end contact. After completing the above steps, spot welding is performed, with preliminary welding done at several evenly distributed points on the circumference of the butt joint of the boiler tubes 1 to fix the positional relationship between the two tubes. After spot welding is completed, the rotating components are activated for a complete circumferential weld. During this process, the buffer assembly 15 absorbs any axial impact forces that may affect the weld quality, ensuring a smooth and precise welding process.

[0027] The clamping assembly includes a clamping cylinder 3, a hinge rod 4 hinged to the body of the clamping cylinder 3, a pressure rod 5 with one end hinged to the output shaft of the clamping cylinder 3 and the middle hinged to the hinge rod 4, and a pressure arm 6 disposed on the pressure rod 5 and located above the V-shaped support block 2.

[0028] When the clamping assembly is in operation, the clamping cylinder 3 is activated, and its output shaft generates axial thrust. This thrust acts directly on one end of the pressure rod 5, which is hinged to it. Simultaneously, the hinge rod 4 on the body of the clamping cylinder 3 and the middle of the pressure rod 5 form a linkage structure, constituting a lever-driven force amplification mechanism. When the cylinder output shaft extends, the lever action of the pressure rod 5 causes the pressure arm 6, located above the V-shaped support block 2, to swing downwards, thereby firmly clamping the boiler tube 1 placed on the V-shaped support block 2. When the cylinder retracts, the pressure arm 6 returns to its original position under the action of the hinge structure, releasing the boiler tube 1 and facilitating the loading and unloading of the workpiece. This structure utilizes cylinder drive and double hinge linkage to achieve stable and reliable clamping and releasing actions.

[0029] The spacing adjustment assembly includes a guide rail 7 arranged along the axial direction of the boiler tube 1, a slider 8 slidably arranged on the guide rail 7, a slide plate 9 located on the slider 8, an adjustment motor 10, and a lead screw 11 arranged at the output end of the adjustment motor 10 and threadedly connected to the slide plate 9 and arranged parallel to the guide rail 7.

[0030] The spacing adjustment component achieves automated precision adjustment via a regulating motor 10. When it is necessary to adjust the distance between the two rotating components to accommodate boiler tubes 1 of different lengths, the regulating motor 10 starts, and the lead screw 11 at its output end rotates accordingly. Since the lead screw 11 is threadedly connected to the slide plate 9, and the support directions at both ends of the lead screw 11 are parallel to the guide rail 7, the rotational motion of the lead screw 11 is converted into the linear reciprocating motion of the slide plate 9 along the guide rail 7. The slider 8 cooperates with the guide rail 7 to provide stable guidance and support for the slide plate 9, ensuring its smooth and deflection-free movement. The slide plate 9 drives the rotating components on it to move synchronously, thereby precisely adjusting the spacing between the two rotating components and achieving precise control of the positioning and docking pressure of the ends of boiler tubes 1 of different specifications.

[0031] The rotating assembly includes a rotary motor 12 mounted on the slide plate 9 and a coupling 13 located at the output end of the rotary motor 12. This rotating assembly is driven by the rotary motor 12 mounted on the slide plate 9. The rotary motor 12 is activated when docking or welding operations are required on the boiler tube 1. The output end of the rotary motor 12 is connected to a subsequent device for clamping the boiler tube 1 via the coupling 13. The coupling 13 serves to connect and transmit torque, ensuring that the power of the rotary motor 12 is smoothly and efficiently transmitted to the boiler tube 1.

[0032] One of the couplings 13 is provided with an abutment block 14, and the other coupling 13 is provided with the buffer assembly 15; the buffer assembly 15 includes a buffer rod 151, a buffer sleeve 152 sleeved on the buffer rod 151, and a buffer spring 153 located in the inner cavity of the buffer sleeve 152 and abutting against the end of the buffer rod 151.

[0033] During the docking of boiler tubes 1, the ends of the two tubes need to achieve smooth and precise contact. In this device, one coupling 13 is equipped with an abutment block 14, which is used to directly push the end of one boiler tube 1 to achieve axial positioning and pushing; the other coupling 13 is equipped with a buffer assembly 15. The buffer assembly 15 consists of a buffer rod 151, a buffer sleeve 152, and a buffer spring 153. The buffer rod 151 is axially telescopically mounted inside the buffer sleeve 152, and its end abuts against the inner cavity of the buffer sleeve 152 through the built-in buffer spring 153. This structure, with rigid pushing at one end and elastic buffering at the other, ensures that the two tubes are subjected to gentle force during docking, avoids end face collision damage, and ensures smooth and precise docking.

[0034] The portion of the buffer rod 151 located within the buffer sleeve 152 has a circumferentially circumferentially formed stop groove 154, and a stop pin 155 located within the stop groove 154 passes through the buffer sleeve 152. In the buffer assembly 15, the portion of the buffer rod 151 located inside the buffer sleeve 152 has a circumferentially formed stop groove 154, while a stop pin 155 passes through the buffer sleeve 152, located within the stop groove 154. When an axial impact force is generated during the docking of the boiler tube 1, the buffer rod 151 moves backward along the inner cavity of the buffer sleeve 152, compressing the buffer spring 153 to absorb the impact energy. At this time, the stop pin 155 interacts with the stop groove 154, restricting the movement of the buffer rod 151 in any direction other than axial movement, ensuring that the buffer rod 151 can only extend and retract along a predetermined axial path. This design not only ensures stability during the buffering process, but also prevents the buffer rod 151 from deflecting or detaching, thus ensuring the reliability and accuracy of the buffer assembly 15 throughout the entire operation.

[0035] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit this utility model. All equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A boiler tube butt welding device, characterized in that, include: V-shaped support blocks for placing boiler tubes; A clamping assembly for pressing boiler tubes onto the V-shaped support block; Spacing adjustment components symmetrically arranged on both sides of the clamping assembly; A rotating component disposed on the spacing adjustment assembly and used to abut against the end of the boiler tube; A buffer component is disposed on one of the rotating components.

2. The boiler tube butt welding device according to claim 1, characterized in that: The clamping assembly includes a clamping cylinder, a hinge rod hinged to the body of the clamping cylinder, a pressure rod with one end hinged to the output shaft of the clamping cylinder and the middle hinged to the hinge rod, and a pressure arm disposed on the pressure rod and located above the V-shaped support block.

3. The boiler tube butt welding device according to claim 1, characterized in that: The spacing adjustment assembly includes a guide rail arranged along the axial direction of the boiler tube, a slider slidably arranged on the guide rail, a slide plate located on the slider, an adjustment motor, and a lead screw arranged at the output end of the adjustment motor, threadedly connected to the slide plate, and arranged parallel to the guide rail.

4. The boiler tube butt welding device according to claim 3, characterized in that: The rotating assembly includes a rotary motor mounted on the slide plate and a coupling mounted at the output end of the rotary motor.

5. The boiler tube butt welding device according to claim 4, characterized in that: One of the couplings is provided with an abutment block, and the other coupling is provided with the buffer assembly; The buffer assembly includes a buffer rod, a buffer sleeve fitted on the buffer rod, and a buffer spring located in the inner cavity of the buffer sleeve and abutting against the end of the buffer rod.

6. The boiler tube butt welding device according to claim 5, characterized in that: The portion of the buffer rod located within the buffer sleeve has a stop groove along its circumference, and a stop pin located within the stop groove passes through the buffer sleeve.

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