A kind of auxiliary device for stove pipe joint welding

Abstract

The application provides an auxiliary device for stove pipe joint welding, which comprises a fixed rod, a first convex ring and a second convex ring are sequentially arranged on the middle part of the circumference of the fixed rod along the length direction and are connected with each other, the diameter of the first convex ring is larger than that of the second convex ring, a gas inlet hole is arranged on one end of the fixed rod along the axial direction, a plurality of gas outlet holes are arranged on the circumference of the fixed tube along the radial direction and are communicated with the gas inlet hole, and the gas outlet holes are arranged in a circumferential array on the side of the second convex ring away from the first convex ring; a rotating rod is internally provided with a containing cavity penetrating through both ends, one end of the fixed rod provided with the gas inlet hole is connected into the containing cavity, the rotating rod is rotationally connected to a mounting frame, one end of the rotating rod away from the fixed rod is connected with a first gear, the first gear is meshingly connected with a second gear, the second gear is connected with the output shaft of a driving motor, and the driving motor is fixed to the mounting frame. The device can automatically introduce protective gas during the welding of the stove pipe joint and automatically drive the stove pipe joint and the stove pipe to rotate.

Description

Technical Field

[0001] This utility model belongs to the field of stove pipe manufacturing technology, and is particularly related to an auxiliary device for welding stove pipe joints. Background Technology

[0002] After the stove pipe is manufactured, a joint is usually welded to its end. Currently, the welding method involves threading both the stove pipe and the joint onto a fixed rod, with their weld joints abutting against each other. A welding torch is then used to weld the contact points, and the fixed rod rotates during the welding process to complete the connection. However, current welding methods are mostly not performed in a protective gas atmosphere. This can easily cause the molten metal at high temperatures to react with oxygen, producing oxides. This leads to brittle welds and slag formation, affecting the welding quality. Therefore, improvements are necessary. Utility Model Content

[0003] To address the aforementioned deficiencies in the prior art, this application provides an auxiliary device for welding stove pipe joints, which can automatically introduce protective gas during the welding process of stove pipe joints and automatically drive the stove pipe joints and stove pipes to rotate.

[0004] To achieve the above objectives, the present invention employs the following technology: An auxiliary device for welding stove pipe joints includes: The fixing rod has a diameter that matches the inner diameter of the stove pipe to be welded. The middle of the fixing rod's periphery has a first convex ring and a second convex ring connected to each other along the length direction. The diameter of the first convex ring is larger than that of the second convex ring. The diameter of the second convex ring matches the inner diameter of the stove pipe joint to be welded. One end of the fixing rod has an air inlet hole along its axial direction. The fixing pipe has multiple air outlet holes that communicate with the air inlet hole along its radial direction. The air outlet holes are arranged in a circumferential array on the side of the second convex ring away from the first convex ring. The rotating rod has a cavity that extends through both ends. One end of the fixed rod with an air inlet is connected to the cavity. The rotating rod is rotatably connected to a mounting bracket. The end of the rotating rod away from the fixed rod is connected to a first gear. The first gear meshes with a second gear. The second gear is connected to the output shaft of a drive motor. The drive motor is fixed to the mounting bracket.

[0005] Furthermore, a spring collet is provided at the end of the accommodating cavity away from the first gear. Multiple clamping parts of the spring collet protrude from the accommodating cavity, and the outer sides of the multiple clamping parts are all inclined surfaces. The end of the inclined surface away from the accommodating cavity is inclined inward. A nut is threadedly connected to the end of the rotating rod near the fixed rod. A push ring is coaxially provided inside the nut for pushing the inclined surface to move inward.

[0006] Furthermore, the accommodating cavity is provided with an abutment ring, the inner diameter of which is smaller than the outer diameter of the fixing rod. When the end of the fixing rod with the air inlet is fully inserted into the accommodating cavity, the fixing rod abuts against the abutment ring.

[0007] Furthermore, the mounting bracket includes a cylindrical housing and a pair of vertical plates with mounting holes on the vertical plates. The two ends of the housing are respectively connected to the two mounting holes. The pair of vertical plates are fixed to a base plate, the drive motor is fixed to the base plate, and the rotating rod is rotatably connected to the housing. The two ends of the housing are connected to a pair of bearings, and the rotating rod is connected to the pair of bearings.

[0008] The beneficial effects of this utility model are as follows: 1. This device can automatically introduce protective gas during the welding process of the stove pipe joint and automatically drive the stove pipe joint and stove pipe to rotate; 2. The fixing rod in this device is replaceable, and thus various sizes of fixing rods can be used to fix various sizes of stove pipe joints and stove pipes. Attached Figure Description

[0009] Figure 1 This is a perspective view of the overall structure of the device according to an embodiment of this application.

[0010] Figure 2 This is a partial three-dimensional view of the device according to an embodiment of this application.

[0011] Figure 3 This is a cross-sectional view of a portion of the structure of the device according to an embodiment of this application.

[0012] Figure 4 This is an exploded view of a portion of the structure of the device according to an embodiment of this application.

[0013] Figure 5 This is a three-dimensional structural view of the nut in the device of this application embodiment.

[0014] Reference numerals: Fixed rod-1, Rotating rod-2, Mounting bracket-3, Drive motor-4, Spring collet-5, Nut-6, First convex ring-101, Second convex ring-102, Air inlet-103, Air outlet-104, Receiving cavity-201, First gear-202, Abutment ring-203, Housing-301, Vertical plate-302, Base plate-303, Bearing-304, Second gear-401, Clamping part-501, Push ring-601, Inclined surface-5011. Detailed Implementation

[0015] To make the objectives, technical solutions and advantages of the present utility model clearer, the implementation methods of the present utility model will be described in detail below with reference to the accompanying drawings. However, the embodiments described in the present utility model are only some embodiments of the present utility model, and not all embodiments.

[0016] This application provides an auxiliary device for welding stove pipe joints, such as... Figures 1-5 As shown, it includes a fixed rod 1, a rotating rod 2, a mounting bracket 3, a drive motor 4, etc.

[0017] Specifically, the fixing rod 1 is arranged laterally, and its diameter matches the inner diameter of the stove pipe to be welded. A first convex ring 101 and a second convex ring 102 are sequentially arranged along the length of the middle of the fixing rod 1's periphery, and are interconnected. The diameter of the first convex ring 101 is larger than that of the second convex ring 102. The diameter of the second convex ring 102 matches the inner diameter of the stove pipe joint to be welded. An air inlet 103 is provided at one end of the fixing rod 1 along its axial direction. Multiple air outlets 104 communicating with the air inlet 103 are provided radially along the periphery of the fixing rod. The air outlets 104 are arranged in a circumferential array on the side of the second convex ring 102 away from the first convex ring 101. More specifically, the second convex ring... The length of 102 can be adjusted according to the stove pipe joint to be welded, so that when the stove pipe joint is completely fitted on the second convex ring 102, the connection end of the stove pipe joint and the stove pipe is within the coverage of the air outlet 104; the rotating rod 2 has a cavity 201 that runs through both ends, and one end of the fixed rod 1 with an air inlet 103 is connected to the cavity 201. The rotating rod 2 is rotatably connected to the mounting bracket 3. The end of the rotating rod 2 away from the fixed rod 1 is connected to a first gear 202. The first gear 202 is meshed with a second gear 401. The second gear 401 is connected to the output shaft of the drive motor 4. The drive motor 4 is fixed on the mounting bracket 3.

[0018] In actual use, the gas supply pipe is inserted into the receiving cavity 201 of the fixed rod 1. Then, the stove pipe connector is put on the second convex ring 102 and abuts against the first convex ring 101. Then, the stove pipe is put on the fixed rod 1 so that the connection end of the stove pipe and the stove pipe connector abuts. Then, the protective gas is input into the receiving cavity 201 through the gas supply pipe. The protective gas can enter the air inlet 103 of the fixed rod 1 and be discharged through the air outlet 104. The protective gas is continuously discharged at the abutment between the stove pipe and the stove pipe connector. Then, the welding torch is used to weld the abutment between the stove pipe and the stove pipe connector. At the same time, the drive motor 4 is controlled to drive the rotating rod 2 to rotate through the second gear 401 and the first gear 202. The rotating rod 2 will drive the fixed rod 1, the stove pipe and the stove pipe connector to rotate together, which facilitates the welding of the entire connection part.

[0019] For details, please refer to Figures 3-5Multiple clamping portions 501, located at the end of the accommodating cavity 201 away from the first gear 202, with spring collets 5 protruding from the accommodating cavity 201, are all inclined surfaces 5011 on their outer sides. The ends of the inclined surfaces 5011 away from the accommodating cavity 201 are all inclined inward. A nut 6 is threadedly connected to the end of the rotating rod 2 near the fixing rod 1. A push ring 601 is coaxially provided inside the nut 6, used to push the inclined surfaces 5011 inward. This arrangement allows the fixing rod 1 to be replaced, and different sizes of fixing rods 1 can be used to fix stove pipe joints and stove pipes of different sizes. When it is necessary to remove the fixing rod 1, unscrewing the nut 6 will release the clamping of the spring collet 5 on the fixing rod 1. When it is necessary to fix the fixing rod 1, screwing in the nut 6 will push the inclined surface 5011 on the outside of the multiple clamping parts 501 of the spring collet 5, causing the multiple clamping parts 501 to move inward and clamp the fixing rod 1.

[0020] For details, please refer to Figure 3 The cavity 201 is provided with an abutment ring 203. The inner diameter of the abutment ring 203 is smaller than the outer diameter of the fixing rod 1. When the end of the fixing rod 1 with the air inlet 103 is fully inserted into the cavity 201, the fixing rod 1 abuts against the abutment ring 203, so that the air inlet 103 in the fixing rod 1 is connected to the part of the cavity 201 in the rotating rod 2 that is behind the abutment ring 203, thereby reducing the leakage of the protective gas at the spring collet 5.

[0021] For details, please refer to Figure 1 The mounting bracket 3 includes a cylindrical housing 301 and a pair of vertical plates 302. The vertical plates 302 have mounting holes. Both ends of the housing 301 are connected to the two mounting holes respectively. The pair of vertical plates 302 are fixed to a base plate 303. The drive motor 4 is fixed to the base plate 303. The rotating rod 2 is rotatably connected inside the housing 301. For more details, see [link to documentation]. Figure 4 A pair of bearings 304 are connected to both ends inside the housing 301, and the rotating rod 2 is connected to the pair of bearings 304 to realize the rotational connection between the housing 301 and the rotating rod 2.

[0022] The above are only some of the embodiments listed in this application and are not intended to limit this application.

Claims

1. An auxiliary device for welding stove pipe joints, characterized in that, include: The fixing rod (1) has a diameter that matches the inner diameter of the stove pipe to be welded. The middle of the circumference of the fixing rod (1) is provided with a first convex ring (101) and a second convex ring (102) connected to each other along the length direction. The diameter of the first convex ring (101) is larger than that of the second convex ring (102). The diameter of the second convex ring (102) matches the inner diameter of the stove pipe joint to be welded. One end of the fixing rod (1) is provided with an air inlet (103) along its axial direction. The circumference of the fixing pipe is provided with a plurality of air outlets (104) that communicate with the air inlet (103). The air outlets (104) are arranged in a circular array on the side of the second convex ring (102) away from the first convex ring (101). The rotating rod (2) has a cavity (201) that extends through both ends. One end of the fixed rod (1) with an air inlet (103) is connected to the cavity (201). The rotating rod (2) is rotatably connected to a mounting bracket (3). The end of the rotating rod (2) away from the fixed rod (1) is connected to a first gear (202). The first gear (202) meshes with a second gear (401). The second gear (401) is connected to the output shaft of a drive motor (4). The drive motor (4) is fixed on the mounting bracket (3).

2. The auxiliary device for welding stove pipe joints according to claim 1, characterized in that, A spring collet (5) is provided at one end of the accommodating cavity (201) away from the first gear (202). Multiple clamping parts (501) of the spring collet (5) protrude out of the accommodating cavity (201), and the outer side of the multiple clamping parts (501) is a slope (5011). The end of the slope (5011) away from the accommodating cavity (201) is inclined inward. A nut (6) is threaded to one end of the rotating rod (2) near the fixed rod (1). A push ring (601) is coaxially provided inside the nut (6) for pushing the slope (5011) to move inward.

3. The auxiliary device for welding stove pipe joints according to claim 2, characterized in that, The accommodating cavity (201) is provided with an abutment ring (203). The inner diameter of the abutment ring (203) is smaller than the outer diameter of the fixing rod (1). When the end of the fixing rod (1) with the air inlet (103) is fully inserted into the accommodating cavity (201), the fixing rod (1) abuts against the abutment ring (203).

4. The auxiliary device for welding stove pipe joints according to claim 1, characterized in that, The mounting bracket (3) includes a cylindrical housing (301) and a pair of vertical plates (302). The vertical plates (302) have mounting holes. The two ends of the housing (301) are respectively connected to the two mounting holes. The pair of vertical plates (302) are fixed on a base plate (303). The drive motor (4) is fixed on the base plate (303). The rotating rod (2) is rotatably connected to the housing (301).

5. The auxiliary device for welding stove pipe joints according to claim 4, characterized in that, A pair of bearings (304) are connected to both ends inside the housing (301), and the rotating rod (2) is connected to the pair of bearings (304).

Images