Seal welding equipment for welding zirconium alloy

Abstract

The utility model relates to the technical field of welding equipment, and discloses seal welding equipment for welding zirconium alloy, which comprises a pipeline fixing clamp, a jacket closed shell, a circulating cooling device and pipeline welding equipment arranged in the jacket closed shell, and the pipeline welding equipment comprises a rotating track and a welding needle fixed on the rotating track. The rotating track is rotatably matched with the jacket closed shell, an opening is formed in the rotating track, meshing teeth are uniformly distributed on the outer ring side of the rotating track, rotation of the rotating track is controlled by the driving equipment, the driving equipment comprises a first driving gear and a second driving gear, and the first driving gear and the second driving gear are rotatably arranged in the jacket closed shell; the welding seam position is fixed through the pipeline clamp matched with the workpiece pipeline, high-purity shielding gas is introduced into the sealing cavity, micro-positive pressure is formed, internal air is exhausted, meanwhile, external air is prevented from entering the sealing cavity, and the welding quality of zirconium alloy is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of welding equipment, especially to a sealed welding equipment for welding zirconium alloy. BACKGROUND

[0002] Zirconium is an expensive corrosion-resistant metal material, which has excellent resistance to acid, alkali and other corrosion. In recent years, it has been greatly applied in acetic acid devices. However, during the installation and manufacturing process of the device, high temperature welding is the "enemy" of the great change of corrosion performance of zirconium alloy. During welding, the activity of zirconium alloy is greatly improved, and reacts with oxygen, hydrogen, nitrogen and other elements in the air to form hard and brittle compounds such as ZrH2, ZrO3 and ZrN, and produce brittle acicular structure, which increases the hardness and strength of the welded joint and reduces the plasticity and corrosion resistance. Another major problem of zirconium welding is that the weld is prone to over-softening, which causes the welding part to move, and the root weld is prone to burn-through.

[0003] Therefore, how to provide a welding equipment that can fix the welding bead and completely isolate air during the welding of zirconium alloy is one of the technical problems urgently to be solved in the field. SUMMARY

[0004] The utility model aims at providing a sealed welding equipment for welding zirconium alloy to solve the problem of difficult zirconium alloy welding.

[0005] The utility model realizes the following technical scheme:

[0006] A sealed welding equipment for welding zirconium alloy, comprising a pipeline fixing clamp, a clamped sleeve closed shell, a circulating cooling device and a pipeline welding equipment arranged in the clamped sleeve closed shell, the pipeline welding equipment comprising a rotating track and a welding needle fixed on the rotating track, the rotating track is in rotational cooperation with the clamped sleeve closed shell, and an opening is arranged on the rotating track.

[0007] Meshing teeth are uniformly distributed on the outer ring side of the rotating track, and the rotation of the rotating track is controlled by a driving device, which comprises a first driving gear and a second driving gear, both of which are rotatably arranged in the clamped sleeve closed shell.

[0008] The two ends of the pipeline are clamped and fixed by the pipeline fixing clamp and the clamped sleeve closed shell, which can effectively prevent the pipeline from moving during welding, and can also seal the welding position to effectively isolate external air.

[0009] The rotational linear speed and rotational direction of the first driving gear and the second driving gear are the same, and the distance between the first driving gear and the second driving gear is greater than the width of the opening on the rotating track, so as to ensure that the rotating track can complete a full rotation under the drive of the driving gear.

[0010] Optionally, the first driving gear and the second driving gear can be driven by a driving motor, and a speed reduction gear set is arranged between the driving shaft of the driving motor and the first driving gear and the second driving gear.

[0011] Optionally, a circular through hole is arranged on the clamping sleeve closed shell, the circular through hole is concentric with the center of the rotating track, the inner diameter of the pipeline fixing clamp is the same as the outer diameter of the pipeline to be welded, and the outer side of the pipeline fixing clamp is provided with a circular feature part with the same diameter as the circular through hole.

[0012] Optionally, the clamping sleeve closed shell comprises a first shell part and a second shell part, one side of the first shell part is hinged to the second shell part, and the other end of the first shell part is provided with a connecting lock buckle, and the pipeline fixing clamp is divided into two parts with the center of the circular center.

[0013] Optionally, the second shell part is further fixed with a circulating water pipeline inlet end and a circulating water pipeline return end, and the circulating water pipeline inlet end and the circulating water pipeline return end are in communication with corresponding ports of the circulating cooling device.

[0014] Optionally, one end of the protective gas pipeline is fixed on the clamping sleeve closed shell, the protective gas pipeline is in communication with the inside of the clamping sleeve closed shell, and the protective gas is continuously introduced to timely exhaust the air in the clamping sleeve closed shell.

[0015] Optionally, the welding needle and the clamping sleeve closed shell are in an insulating state, the welding needle is electrically connected with the positive electrode, and the clamping sleeve closed shell is electrically connected with the negative electrode.

[0016] Optionally, the connecting and fixing position of the rotating track and the welding needle is the welding needle fixing position, and a detachable connecting and fixing mode is adopted between the welding needle and the rotating track at the welding needle fixing position.

[0017] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0018] 1. The utility model discloses a pipeline clamp matched with the workpiece pipeline is used to fix the welding position, high-purity protective gas is introduced into the sealed cavity, micro-positive pressure is formed, the internal air is exhausted, and the entry of external air is also prevented, the influence of oxygen, hydrogen, nitrogen and other elements existing in the air on the zirconium alloy in the high-temperature state is effectively prevented, and the welding quality of the zirconium alloy is ensured.

[0019] 2. The utility model solves the problems of deformation and burning of the welding bead of zirconium and similar noble metals, and the formation of needle-shaped brittle compounds, and the driving motor is used to stably drive the rotation of the welding electrode to complete welding, so that the welding quality of the welding position is effectively ensured, the operation efficiency is improved, and the welding quality is ensured.

[0020] 3. The utility model adopts a circulating cooling device to cool the pipeline welding equipment, which can prevent the thermal deformation of the rotating track and also ensure the stable operation of the driving equipment, ensure the stability of the welding needle movement during welding operation, improve the welding quality, and ensure the stability of the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the accompanying drawings:

[0022] Figure 1 It is a structural diagram of the utility model;

[0023] Figure 2 It is a half-section view of the utility model;

[0024] Figure 3 This is a structural diagram of the pipeline fixing clamp in the present invention in a buckled state;

[0025] Figure 4 This is a structural schematic diagram of the pipeline fixing clamp in the utility model in the open state.

[0026] The reference numerals represent: 1-jacketed sealed shell, 101-first shell part, 102-second shell part, 2-pipe fixing fixture, 3-rotating track, 301-welding needle fixing place, 4-welding needle, 5-first driving gear, 6-second driving gear, 7-protective gas pipeline, 8-circulating water pipeline inlet end, 9-circulating water pipeline return end, 10-electrode negative pole, 11-electrode positive pole. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The schematic implementation methods of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0028] Examples, such as Figures 1 to 4 As shown, this embodiment includes a pipe fixing fixture 2, a jacketed closed shell 1, and a pipe welding device disposed in the jacketed closed shell 1. The pipe welding device includes a rotating track 3 and a welding needle 4 fixed on the rotating track 3. The tip of the welding needle 4 points to the center position of the rotating track 3. The rotating track 3 is rotatably engaged with the jacketed closed shell 1. An opening is provided on the rotating track 3 so that the rotating track 3 is an unclosed circular ring. The opening facilitates the rapid placement of the pipe from the opening position at the center position of the rotating track 3 during welding, and also facilitates the removal of the device from the pipe after welding.

[0029] The rotation of the rotating track 3 is controlled by a driving device, the rotating track 3 is provided with engagement teeth on the outer ring side, the driving device includes a first driving gear 5 and a second driving gear 6, the first driving gear 5 and the second driving gear 6 are both rotatably arranged in the jacketed closed shell 1, the rotational linear speed and the rotation direction of the first driving gear 5 and the second driving gear 6 are the same, and further, the distance between the first driving gear 5 and the second driving gear 6 is greater than the width of the opening on the rotating track 3, the rotating track 3 is driven to rotate by the two driving gears, and in the case that the distance between the two driving gears is greater than the width of the opening, it can be ensured that the rotating track 3 is always in meshing state with one driving gear, and it can be ensured that the rotating track 3 can realize 360-degree rotation.

[0030] In the embodiment, the center region of the rotating track 3 is a welding work area, the jacketed closed shell 1 is provided with a circular through hole, the circular through hole is concentric with the center of the rotating track 3, and the diameter of the circular through hole is greater than the diameter of the pipeline to be welded, so as to facilitate improving the sealing effect of the cooperation between the jacketed closed shell 1 and the pipeline, the pipeline fixing clamp 2 is arranged between the pipeline and the jacketed closed shell 1, the inner diameter of the pipeline fixing clamp 2 is the same as the outer diameter of the pipeline to be welded, and the outer side of the pipeline fixing clamp 2 is provided with a circular feature part with the same diameter as the circular through hole, after the circular feature part cooperates with the circular through hole, the inner side of the pipeline fixing clamp 2 cooperates with the pipeline, which can greatly improve the sealing effect of the pipeline welding position of the device, and the inner diameter of the pipeline fixing clamp 2 can be set to multiple specifications, so as to facilitate the welding of pipelines with different diameters.

[0031] Further, in order to facilitate the device to be removed from the completed welded pipeline after the welding operation is completed, the jacketed closed shell 1 includes a first shell part 101 and a second shell part 102, one side of the first shell part 101 is hinged to the second shell part 102, and the other end of the first shell part 101 is provided with a connecting lock buckle which can lock and fix the first shell part 101 and the second shell part 102, and the pipeline fixing clamp 2 is divided into two parts with its center as the center, when clamping and fixing the pipeline, only the pipeline fixing clamp 2 on one side needs to be installed by buckling the two parts of the pipeline fixing clamp 2 with the pipeline, and the pipeline welding position on one side can be sealed by buckling the pipeline fixing clamp 2 by the first shell part 101 and the second shell part 102.

[0032] In the embodiment, one end of the protective gas pipeline 7 is fixed to the jacketed closed shell 1, and the protective gas pipeline 7 is in communication with the inside of the jacketed closed shell 1. During welding, the protective gas pipeline 7 is used to continuously introduce protective gas into the jacketed closed shell 1, so as to discharge the air in the jacketed closed shell 1 and prevent the external air from entering the jacketed closed shell 1 again.

[0033] Optionally, the first driving gear 5 and the second driving gear 6 can be driven by a driving motor, a speed reduction gear set is arranged between the driving shaft of the driving motor and the first driving gear 5 and the second driving gear 6, the driving motor drives the first driving gear 5 and the second driving gear 6 to rotate at the same speed and in the same direction through the speed reduction gear set, and the motor axis of the driving motor is parallel to the gear shaft of the driving gear.

[0034] In the embodiment, the connecting and fixing position of the rotating track 3 and the welding needle 4 is the welding needle fixing position 301, and the welding needle 4 and the rotating track 3 are connected and fixed in a detachable manner at the welding needle fixing position 301, so that different lengths of the welding needle 4 can be replaced when welding pipes with different diameters.

[0035] The second housing part 102 is also provided with a circulating cooling device (not shown in the figure), which is used to cool and protect the driving device, prevent the driving device from being damaged due to high temperature during welding, and also cool and protect the part of the rotating track 3 entering the second housing part 102, prevent the deformation of the rotating track 3 caused by high temperature, effectively ensure the stability of the operation of the rotating track 3, and further ensure the stability of the welding quality. The second housing part 102 is also fixed with a circulating water pipeline inlet end 8 and a circulating water pipeline return end 9, the circulating water pipeline inlet end 8 and the circulating water pipeline return end 9 are respectively in communication with the corresponding ports of the circulating cooling device, so as to form an effective circulating water loop.

[0036] In the embodiment, the welding needle 4 and the jacketed closed shell 1 are in an insulating state, the welding needle 4 is electrically connected with the positive electrode 11, and the jacketed closed shell 1 is electrically connected with the negative electrode 10.

[0037] In use, first, the pipeline is fixed by the same specification pipeline fixing clamp 2, then the weld of the pipeline is aligned, the electrode is fixed on the rotating track 3, high-purity protective gas is introduced, the jacketed closed shell 1 is closed, circulating cooling water is introduced into the jacketed closed shell 1 to exchange heat generated by welding to avoid overheating deformation, the equipment is powered on, the driving motor is started to rotate, then high-frequency ignition is carried out, after high-frequency ignition, the electric arc is generated at the welding needle 4, so that the welding heat is obtained at the welding position to melt the weld, the welding is started, after the welding needle 4 rotates along the pipeline for one circle, the welding is completed, at this time, the protective gas needs to be continuously introduced until the pipeline after welding is cooled down, then the jacketed closed shell 1 is opened, and the welding quality is checked.

[0038] The above specific embodiments further explain the purpose, technical scheme and beneficial effects of the present application, and it should be understood that the above description is only a specific embodiment of the present application and is not used to limit the protection scope of the present application, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A sealed welding apparatus for welding zirconium alloys, comprising a pipe fixing jig (2), a jacketed closed housing (1), a circulating cooling device, and a pipe welding apparatus provided in the jacketed closed housing (1), characterized in that, The pipe welding device comprises a rotating track (3) and a welding needle (4) fixed on the rotating track (3), the rotating track (3) is in rotation cooperation with the jacketed closed shell (1), and an opening is arranged on the rotating track (3).

2. A sealed welding apparatus for welding zirconium alloys according to claim 1, characterized in that, The rotating track (3) is uniformly provided with meshing teeth on the outer ring side, and the rotation of the rotating track (3) is controlled by a driving device, the driving device comprises a first driving gear (5) and a second driving gear (6), and the first driving gear (5) and the second driving gear (6) are both arranged in rotation in the jacketed closed shell (1).

3. A sealed welding apparatus for welding zirconium alloys according to claim 2, wherein The linear speed and the rotation direction of the first driving gear (5) and the second driving gear (6) are the same, and the distance between the first driving gear (5) and the second driving gear (6) is greater than the width of the opening on the rotating track (3).

4. A sealed welding apparatus for welding zirconium alloys according to claim 3, wherein The first driving gear (5) and the second driving gear (6) can be driven by one driving motor, and a speed reduction gear set is arranged between the driving shaft of the driving motor and the first driving gear (5) and the second driving gear (6).

5. A sealed welding apparatus for welding zirconium alloys as defined in claim 1, wherein A circular through hole is arranged on the jacketed closed shell (1), the circular through hole is concentric with the center of the rotating track (3), the inner diameter of the pipe fixing clamp (2) is the same as the outer diameter of the pipe to be welded, and a circular feature part with the same diameter as the circular through hole is arranged on the outer side of the pipe fixing clamp (2).

6. A sealed welding apparatus for welding zirconium alloys according to claim 5, wherein The jacketed closed shell (1) comprises a first shell part (101) and a second shell part (102), one side of the first shell part (101) is hinged to the second shell part (102), the other end of the first shell part (101) is provided with a connecting lock, and the pipe fixing clamp (2) is divided into two parts with the center of the circular hole as the center.

7. A sealed welding apparatus for welding zirconium alloys according to claim 6, characterized in that The second shell part (102) is also fixed with a circulating water pipe inlet end (8) and a circulating water pipe return end (9), and the circulating water pipe inlet end (8) and the circulating water pipe return end (9) are respectively communicated with the corresponding ports of the circulating cooling device.

8. A sealed welding apparatus for welding zirconium alloys according to claim 1, wherein One end of a protective gas pipe (7) is fixed on the jacketed closed shell (1), and the protective gas pipe (7) is communicated with the inside of the jacketed closed shell (1).

9. A sealed welding apparatus for welding zirconium alloys as defined in claim 1, wherein The welding needle (4) and the jacketed closed shell (1) are in an insulating state, the welding needle (4) is electrically connected with a positive electrode (11), and the jacketed closed shell (1) is electrically connected with a negative electrode (10).

10. A sealed welding apparatus for welding zirconium alloys according to claim 1, wherein The connection and fixing position of the rotating track (3) and the welding needle (4) is a welding needle fixing position (301), and a detachable connection and fixing mode is adopted between the welding needle (4) and the rotating track (3) at the welding needle fixing position (301).

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