Self-centering clamping device for furnace tube welding

Abstract

The self-centering clamping device for furnace tube welding comprises a base and a sliding supporting assembly which is arranged in the central area of the base and can slide relative to the base, and a supporting part of the sliding supporting assembly is used for supporting welding equipment and can slide in the length direction of the base; a first clamping assembly and a second clamping assembly are further arranged on the two opposite side areas of the base correspondingly. The first end of the first clamping assembly is in transmission connection with the sliding supporting assembly, and the second end of the first clamping assembly corresponds to the supporting part. The first end of the second clamping assembly is in transmission connection with the sliding supporting assembly, and the second end of the second clamping assembly corresponds to the supporting part and is matched with the second end of the first clamping assembly to clamp welding equipment. When the supporting part slides in the length direction of the base, the second end of the first clamping assembly and the second end of the second clamping assembly rotate towards the same side in the width direction of the base. Self-centering clamping can be achieved through the sliding supporting assembly, the first clamping assembly and the second clamping assembly, and the structure is simple and reliable.

Description

Technical Field

[0001] Embodiments of the present disclosure belong to the technical field of welding, and particularly relate to a self-centering clamping device for furnace tube welding. Background Art

[0002] The water wall is the main evaporative heating surface of a utility boiler. It is arranged around the boiler furnace and mainly absorbs the radiant heat of the furnace flame to heat the water in the water wall to generate steam to protect the boiler furnace wall. The water wall is composed of multiple vertically arranged water-cooling tubes, usually made of steel. Due to long-term exposure to high-temperature radiation, high-speed flue gas scouring, and other factors, tube bursting sometimes occurs and needs to be repaired by welding. The repair welding of water-cooling tubes involves the automatic butt welding of "tube-tube" circumferential welds. To achieve the above process, it is usually necessary to clamp the welding equipment on the tube; it is required that the clamping device can ensure that the axis of the welding torch rotation trajectory coincides with the tube axis. Existing clamping devices all achieve axis adjustment by manually adjusting the clamping position, which is time-consuming and laborious, and the effect is not significant, seriously affecting the welding quality. Summary of the Invention

[0003] Embodiments of the present disclosure aim to solve at least one of the technical problems existing in the prior art, and provide a self-centering clamping device for furnace tube welding.

[0004] Embodiments of the present disclosure provide a self-centering clamping device for furnace tube welding. The self-centering clamping device includes a base, a sliding support assembly disposed in the central region of the base and slidable relative to the base, and a support portion of the sliding support assembly for supporting a welding device and capable of sliding along the length direction of the base;

[0005] First clamping assemblies and second clamping assemblies are respectively disposed in the opposite side regions of the base; a first end of the first clamping assembly is in transmission connection with the sliding support assembly, and its second end corresponds to the support portion; a first end of the second clamping assembly is in transmission connection with the sliding support assembly, and its second end corresponds to the support portion and cooperates with the second end of the first clamping assembly to clamp the welding device; wherein,

[0006] When the support portion slides along the length direction of the base, the second ends of the first clamping assembly and the second clamping assembly rotate towards the same side along the width direction of the base.

[0007] Optionally, the length direction of the base is perpendicular to its width direction, and the sliding support assembly, the first clamping assembly, and the second clamping assembly are all disposed on the same side of the base.

[0008] Optionally, the sliding support assembly includes a guiding portion fixed on the base and a sliding table slidably disposed on the guiding portion;

[0009] The guide portion is arranged along the length direction of the base, and the slide is slidably arranged on the guide portion along the length direction of the base.

[0010] Optionally, the guide portion includes a base fixed to the base and provided with a groove, a screw drive structure is provided in the groove, and the screw drive structure is provided with the slide connected to its thread; the base is also provided with a driving member for driving the screw drive structure.

[0011] Optionally, the driving member is a rotary handle or a driving motor.

[0012] Optionally, the first end of the support portion is fixedly connected to the slide platform to drive the support portion to slide along the length direction of the base;

[0013] The second end of the support portion is slidably disposed on the base and is used to support the welding device. The direction of the support portion from the first end to the second end is parallel to the length direction of the base.

[0014] Optionally, the slide is provided with rack structures on two opposite sides along the width direction of the base; the first clamping assembly includes a first connecting portion and a first clamping portion, and the second clamping assembly includes a second connecting portion and a second clamping portion;

[0015] The first ends of the first connecting part and the second connecting part are respectively transmission-connected to the two opposite sides of the slide along the width direction of the base, the first ends of the first clamping part and the second clamping part are respectively connected to the second ends of the first connecting part and the second connecting part, and the second ends of the first clamping part and the second clamping part respectively correspond to the second ends of the supporting part.

[0016] Optionally, the first connecting part and the second connecting part both include a rotating gear provided on the base and corresponding to the rack structure of the slide, a rotating shaft rotatably provided on the base, and a connecting rod whose two ends are respectively connected to the rotating gear and the rotating shaft.

[0017] Optionally, the first ends of the first clamping portion and the second clamping portion are respectively connected to the corresponding rotating shaft, and the first clamping portion and the second clamping portion gradually move toward the supporting portion from their first ends to their second ends.

[0018] Optionally, the second end of the support portion is provided with first anti-slip grooves arranged in an array, and the second ends of the first clamping portion and the second clamping portion are both provided with second anti-slip grooves arranged in an array for clamping the welding equipment.

[0019] The self - centering clamping device for furnace tube welding according to the embodiments of the present disclosure can achieve self - centering clamping of welding equipment through the provided sliding support assembly, first clamping assembly, and second clamping assembly. The structure is simple and reliable, time - saving and labor - saving, and can effectively improve the welding quality. Brief Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of a self - centering clamping device for furnace tube welding according to an embodiment of the present disclosure. Detailed Description of the Embodiments

[0021] To enable those skilled in the art to better understand the technical solutions of the present disclosure, the present disclosure will be further described in detail below in conjunction with the drawings and specific embodiments.

[0022] As Figure 1 shown, a self - centering clamping device 100 for furnace tube welding, the self - centering clamping device 100 includes a base 110, a sliding support assembly 120 disposed in the central region of the base 110 and slidable relative to the base 110. The support portion 121 of the sliding support assembly 120 is used to support the welding equipment (not shown in the figure) and can slide along the length direction of the base 110.

[0023] On the opposite two side regions of the base 110, a first clamping assembly 130 and a second clamping assembly 140 are respectively provided. The first end of the first clamping assembly 130 is in transmission connection with the sliding support assembly 120, and its second end corresponds to the support portion 121. The first end of the second clamping assembly 140 is in transmission connection with the sliding support assembly 120, and its second end corresponds to the support portion 121 and cooperates with the second end of the first clamping assembly 130 to clamp the welding equipment. When the support portion 121 slides along the length direction of the base 110, the second ends of the first clamping assembly 130 and the second clamping assembly 140 rotate towards the same side along the width direction of the base 110.

[0024] Specifically, as Figure 1 shown, the sliding support assembly 120 can slide relative to the length direction of the base 110. The support portion 121 supports the welding equipment and slides along the length direction of the base 110. The first clamping assembly 130 and the second clamping assembly 140 are respectively arranged on both sides of the sliding support assembly 120. The first ends of both are in transmission connection with the sliding support assembly 120, and the second ends of both respectively correspond to the support portion 121, so as to clamp the welding equipment supported by the support portion 121.

[0025] When the support portion 121 slides along the length direction of the base 110, as Figure 1As shown, when the support part 121 slides towards the side extending out of the base 110, the first clamping assembly 130 and the second clamping assembly 140 rotate towards the left side of the support part 121 simultaneously. When the support part 121 slides towards the side retracting into the base 110, the first clamping assembly 130 and the second clamping assembly 140 rotate towards the right side of the support part 121 simultaneously. The support part 121, the first clamping assembly 130, and the second clamping assembly 140 cooperate to achieve self-centering clamping of the welding equipment. The overall structure is simple and reliable, time-saving and labor-saving, can effectively improve the welding quality, and there is no need for manual continuous adjustment of the clamping position.

[0026] Further, as Figure 1 shown, the length direction of the base 110 is perpendicular to its width direction, and the sliding support assembly 120, the first clamping assembly 130, and the second clamping assembly 140 are all arranged on the same side of the base 110.

[0027] Exemplarily, as Figure 1 shown, the sliding support assembly 120 includes a guiding part 122 fixed on the base 110 and a sliding table 123 slidably arranged on the guiding part 122. The guiding part 122 is arranged along the length direction of the base 110, and the sliding table 123 is slidably arranged on the guiding part 122 along the length direction of the base 110.

[0028] Specifically, as Figure 1 shown, the guiding part 122 is fixed on the base 110, and the sliding table 123 is slidably arranged on the guiding part 122. For example, the guiding part 122 includes a base 1222 fixed on the base 110 and provided with a groove 1221, a screw drive structure 1223 is arranged in the groove 1221, and the sliding table 123 is threaded through the screw drive structure 1223. A driving member 200 for driving the screw drive structure 1223 is further arranged on the base 1222.

[0029] The first end of the support part 121 is fixedly connected to the sliding table 123 to drive the support part 121 to slide along the length direction of the base 110. The second end of the support part 121 is slidably arranged on the base 1222 and is used to support the welding equipment. The direction of the support part 121 from its first end to the second end is parallel to the length direction of the base 110.

[0030] Under the driving action of the driving member 200, the screw drive structure 1223 moves and drives the sliding table 123 to slide along the length direction of the base 110, and the sliding table 123 drives the support part 121 to move along the length direction of the base 110. It should be noted that the driving member 200 can be further set as a rotating handle or a driving motor.

[0031] Exemplarily, as Figure 1 shown, the slide table 123 is provided with rack structures 1231 on both sides along the width direction of the base 110. The first clamping assembly 130 includes a first connecting portion 131 and a first clamping portion 132, and the second clamping assembly 140 includes a second connecting portion 141 and a second clamping portion 142.

[0032] The first ends of the first connecting portion 131 and the second connecting portion 141 are respectively drivingly connected to both sides along the width direction of the slide table 123 relative to the base 110. The first ends of the first clamping portion 132 and the second clamping portion 142 are respectively connected to the second ends of the first connecting portion 131 and the second connecting portion 141. The second ends of the first clamping portion 132 and the second clamping portion 142 respectively correspond to the second end of the support portion 121.

[0033] Specifically, as Figure 1 shown, the first ends of the first connecting portion 131 and the second connecting portion 141 are respectively drivingly connected to the rack structures 1231 on the left and right sides of the slide table 123. The first ends of the first clamping portion 132 and the second clamping portion 142 are respectively connected to the second ends of the first connecting portion 131 and the second connecting portion 141. Under the driving action of the driving member 200, the lead screw driving structure 1223 moves and drives the slide table 123 to slide along the length direction of the base 110. The slide table 123 drives the support portion 121 to move along the length direction of the base 110. At the same time, the second ends of the first clamping portion 132 and the second clamping portion 142 follow the movement, and rotate towards the same side along the width direction of the base 110 and cooperate with the support portion 121 to realize self-centering clamping of the welding equipment.

[0034] Further, as Figure 1 shown, the first connecting portion 131 and the second connecting portion 141 both include rotating gears 151 provided on the base 110 and corresponding to the rack structures 1231 of the slide table 123, a rotating shaft 152 rotatably provided on the base 110, and a connecting rod 153 with two ends respectively connected to the rotating gear 151 and the rotating shaft 152.

[0035] Still further, the first ends of the first clamping portion 132 and the second clamping portion 142 are respectively connected to the corresponding rotating shafts 152, and the first clamping portion 132 and the second clamping portion 142 gradually approach the support portion 121 from their first ends to their second ends.

[0036] Specifically, as Figure 1As shown in the figure, the rotating gear 151 is rotatably arranged on the base 110 and is in gear engagement with the rack structure 1231 on the corresponding side of the sliding table 123. A rotatable rotating shaft 152 is also arranged on the base 110. Both ends of the connecting rod 153 are respectively connected to the rotating gear 151 and the rotating shaft 152. The rotating shaft 152 is also connected to the corresponding first clamping portion 132 or the second clamping portion 142.

[0037] Under the driving action of the driving member 200, the lead screw driving structure 1223 moves and drives the sliding table 123 to slide along the length direction of the base 110, thereby driving the supporting portion 121 to move along the length direction of the base 110. The sliding table 123 also drives the rotating gear 151 to rotate through the rack structure 1231. The rotating gear 151 drives the connecting rod 153 and the rotating shaft 152 to move, thereby simultaneously driving the first clamping portion 132 and the second clamping portion 142 to follow the movement, and rotate toward the same side along the width direction of the base 110 and cooperate with the supporting portion 121 to realize the self-centering clamping of the welding equipment.

[0038] The self-centering clamping device for furnace tube welding in the embodiment of the present disclosure adopts a mechanical structure. The overall structure is simple and reliable. The motion mechanism with the cooperation of the gear and the rack structure can transmit a large torque and has a large clamping force. The self-centering clamping device for furnace tube welding in the embodiment of the present disclosure can realize self-centering clamping through the clamping assembly when the supporting portion moves, and the overall structure is compact and can realize clamping in a narrow space.

[0039] Exemplarily, as Figure 1 shown, the second end of the supporting portion 121 is provided with an array of first anti-slip grooves 300, and the second ends of the first clamping portion 132 and the second clamping portion 142 are both provided with an array of second anti-slip grooves 400 for clamping the welding equipment. By providing the first anti-slip grooves 300 at the second end of the supporting portion 121 and the second anti-slip grooves 400 at the second ends of the first clamping portion 132 and the second clamping portion 142, the welding equipment can be further clamped, effectively preventing slipping and avoiding the situation of the welding equipment falling.

[0040] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principle of the present disclosure. However, the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present disclosure, and these modifications and improvements are also regarded as the protection scope of the present disclosure.

Claims

1. A self - centering clamping device for furnace tube welding, characterized in that, The self-centering clamping device includes a base, a sliding support assembly disposed in the central region of the base and slidable relative to the base, and a support portion of the sliding support assembly for supporting a welding device and capable of sliding along the length direction of the base; First clamping assemblies and second clamping assemblies are respectively disposed in opposite side regions of the base; a first end of the first clamping assembly is in transmission connection with the sliding support assembly, and its second end corresponds to the support portion; a first end of the second clamping assembly is in transmission connection with the sliding support assembly, and its second end corresponds to the support portion and cooperates with the second end of the first clamping assembly to clamp the welding device; wherein, When the support portion slides along the length direction of the base, second ends of the first clamping assembly and the second clamping assembly rotate toward the same side along the width direction of the base.

2. The self-centering clamping device for furnace tube welding according to claim 1, characterized in that, The length direction of the base is perpendicular to its width direction, and the sliding support assembly, the first clamping assembly and the second clamping assembly are all disposed on the same side of the base.

3. The self-centering clamping device for furnace tube welding according to claim 2, characterized in that, The sliding support assembly includes a guiding portion fixed on the base and a sliding table slidably disposed on the guiding portion; The guiding portion is disposed along the length direction of the base, and the sliding table is slidably disposed on the guiding portion along the length direction of the base.

4. The self-centering clamping device for furnace tube welding according to claim 3, characterized in that, The guiding portion includes a base fixed on the base and provided with a groove, a lead screw driving structure is disposed in the groove, and the sliding table threadedly connected thereto is disposed on the lead screw driving structure; a driving member for driving the lead screw driving structure is further disposed on the base.

5. The self-centering clamping device for furnace tube welding according to claim 4, wherein, The driving member is a rotating handle or a driving motor.

6. The self-centering clamping device for furnace tube welding according to claim 4, characterized in that, A first end of the support portion is fixedly connected to the sliding table to drive the support portion to slide along the length direction of the base; A second end of the support portion is slidably disposed on the base and is used for supporting the welding device, and the direction of the support portion from its first end to the second end is parallel to the length direction of the base.

7. The self-centering clamping device for furnace tube welding according to claim 6, characterized in that, The sliding table is provided with rack structures on opposite sides along the width direction of the base; the first clamping assembly includes a first connecting portion and a first clamping portion, and the second clamping assembly includes a second connecting portion and a second clamping portion; First ends of the first connecting portion and the second connecting portion are respectively in transmission connection with opposite sides of the sliding table along the width direction of the base, first ends of the first clamping portion and the second clamping portion are respectively connected to second ends of the first connecting portion and the second connecting portion, and second ends of the first clamping portion and the second clamping portion respectively correspond to the second end of the support portion.

8. The self-centering clamping device for furnace tube welding according to claim 7, wherein, Both the first connecting portion and the second connecting portion include a rotating gear disposed on the base and corresponding to the rack structure of the sliding table, a rotating shaft rotatably disposed on the base, and a connecting rod with two ends respectively connected to the rotating gear and the rotating shaft.

9. The self-centering clamping device for furnace tube welding according to claim 8, characterized in that, First ends of the first clamping portion and the second clamping portion are respectively connected to the corresponding rotating shaft, and the first clamping portion and the second clamping portion gradually approach the support portion from their first ends to their second ends.

10. The self-centering clamping device for furnace tube welding according to claim 7, characterized in that, The second end of the supporting part is provided with first anti-slip grooves arranged in an array, and the second ends of the first clamping part and the second clamping part are both provided with second anti-slip grooves arranged in an array for clamping the welding equipment.

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