An auxiliary device for the neutral wire of submerged arc welding of pressure vessels

Abstract

This utility model relates to the field of neutral wire assistance, specifically an auxiliary device for neutral wire in submerged arc welding of pressure vessels. It includes a roller device, an auxiliary mechanism at the bottom of the cylinder, and a support bracket located on one side of the roller device. A lever is rotatably connected to the top of the support bracket via a pivot. One end of the lever is fixedly connected to a mounting bracket. A limit wheel is rotatably connected to the inner wall of the mounting bracket, and two positioning rods are fixedly connected to the inner wall of the mounting bracket. Rotating frames are rotatably connected to the surfaces of the two positioning rods, and guide wheels are rotatably connected to the inner walls of the two rotating frames. Torsion springs are sleeved on the surfaces of the two positioning rods. This utility model, by providing an auxiliary mechanism, eliminates the need to weld a grounding point onto the cylinder. The torsion springs provide adaptive adjustment capabilities, forming an elastic clamp to prevent the neutral wire from loosening and falling off, ensuring that the neutral wire always maintains appropriate pressure.

Description

Technical Field

[0001] This utility model relates to the field of neutral wire assistance, specifically an auxiliary device for neutral wire in submerged arc welding of pressure vessels. Background Technology

[0002] The neutral wire in submerged arc welding is usually referred to as the wire connecting the workpiece and the welding power source in the welding circuit. It is used to form a complete current loop so that the welding current can be transmitted from the power source through the welding gun, welding wire, and arc to the workpiece and then smoothly return to the power source. Although it is commonly referred to as the neutral wire in the industry, it is not the neutral line or grounding protection line in the power system. Instead, it is a welding return line that carries a large current and is also often called the workpiece cable or grounding cable.

[0003] In conventional submerged arc welding, the neutral wire needs to be welded directly to the cylinder. As the cylinder rotates with the roller device, the neutral wire will wrap around it synchronously. This not only leads to a significant increase in the required length of the neutral wire, but also causes the neutral wire to be in a dynamic wrapped state, which makes it very easy for it to get tangled or scratched with surrounding equipment or personnel, creating safety hazards. At the same time, continuous wrapping will loosen the neutral wire joint, directly affecting the stability of conductivity. Utility Model Content

[0004] To overcome the shortcomings of existing technologies and solve the technical defects of dynamic winding of the neutral wire on the rotating cylinder in conventional submerged arc welding, which causes safety hazards, this utility model proposes an auxiliary device for the neutral wire in submerged arc welding of pressure vessels.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an auxiliary device for the neutral wire of submerged arc welding of pressure vessels, including a roller device, a cylinder rotatably connected to the top of the roller device, a neutral wire body provided at the bottom of the cylinder, and an auxiliary mechanism provided at the bottom of the cylinder. The auxiliary mechanism includes a bracket disposed on one side of the roller device. A lever is rotatably connected to the top of the bracket via a pivot. A mounting frame is fixedly connected to one end of the lever. A limit wheel is rotatably connected to the inner wall of the mounting frame. Two positioning rods are fixedly connected to the inner wall of the mounting frame. A rotating frame is rotatably connected to the surface of each of the two positioning rods. A guide wheel is rotatably connected to the inner wall of each of the two rotating frames. A torsion spring is sleeved on the surface of each of the two positioning rods. One end of the torsion spring is fixedly connected to the surface of the positioning rod, and the other end of the torsion spring is fixedly connected to the surface of the rotating frame. The surface of the neutral wire body is in contact with the surfaces of the limit wheel and the two guide wheels.

[0006] Preferably, a fixing ring is fixedly connected to the other end of the lever, and a counterweight is provided at the other end of the lever. A hook is fixedly connected to the top of the counterweight, and the hook is used in conjunction with the fixing ring.

[0007] Preferably, one end of the bracket is fixed with an extension plate, and the top of the extension plate is fixedly connected with a fixing frame.

[0008] Preferably, the top of the fixing frame is provided with an arc-shaped frame, and the neutral wire body extends through the inner wall of the arc-shaped frame and the fixing frame.

[0009] Preferably, the inner walls of both the arc-shaped frame and the fixed frame are fixedly connected with rubber pads, and the surface of the rubber pads is in contact with the surface of the neutral wire body.

[0010] Preferably, the inner wall of the arc-shaped frame is threaded with two bolts, and the arc-shaped frame is fixedly connected to the top of the fixed frame by the bolts.

[0011] The advantages of this utility model are: This invention utilizes an auxiliary mechanism where a lever swings within a support to adapt to cylinders of different diameters. A limiting wheel constrains the lateral position of the neutral wire body. Two guide wheels are rotatably connected to the positioning rods on both sides via torsion springs. One guide wheel guides the neutral wire body to rotate, while the other presses against one end of the neutral wire body, ensuring it remains in contact with the cylinder surface and that the conductive portion is always in contact with the cylinder. The two guide wheels and the limiting wheel are arranged laterally, aligned with the cylinder axis, reducing resistance during cylinder rotation. This eliminates the need to weld a grounding point onto the cylinder, protecting its integrity. The torsion springs provide adaptive adjustment, forming an elastic clamp to prevent the neutral wire body from loosening and falling off. The two guide wheels automatically adjust their opening angle according to the cylinder size, ensuring the neutral wire body maintains appropriate pressure. This allows the neutral wire body to continuously adhere to the cylinder under dynamic conditions, achieving low resistance and stable conduction in the welding negative electrode circuit, thus improving the safety and reliability of submerged arc welding. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a partial structural schematic diagram of the auxiliary mechanism of this utility model; Figure 3 This is a partial structural diagram of the limiting wheel of this utility model; Figure 4 This is a partial structural diagram of the arc-shaped frame of this utility model.

[0014] In the diagram: 1. Roller assembly; 2. Auxiliary mechanism; 201. Bracket; 202. Lever; 203. Mounting frame; 204. Limiting wheel; 205. Rotating frame; 206. Positioning rod; 207. Guide wheel; 208. Torsion spring; 3. Neutral wire body; 4. Cylinder; 5. Fixing frame; 6. Fixing ring; 7. Hook; 8. Counterweight; 9. Extension plate; 10. Bolt; 11. Arc frame; 12. Rubber pad. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0016] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail. This application discloses an auxiliary device for the neutral wire in submerged arc welding of pressure vessels. (Refer to...) Figure 1 , Figure 2 and Figure 3 An auxiliary device for the neutral wire of submerged arc welding of pressure vessels includes a roller device 1, a cylinder 4 rotatably connected to the top of the roller device 1, a neutral wire body 3 provided at the bottom of the cylinder 4, and an auxiliary mechanism 2 provided at the bottom of the cylinder 4. The auxiliary mechanism 2 includes a bracket 201, which is located on one side of the roller device 1. A lever 202 is rotatably connected to the top of the bracket 201 via a pivot. One end of the lever 202 is fixedly connected to a mounting frame 203. A limit wheel 204 is rotatably connected to the inner wall of the mounting frame 203. Two positioning rods 206 are fixedly connected to the inner wall of the mounting frame 203. Rotating frames 205 are rotatably connected to the surfaces of both positioning rods 206. Guide wheels 207 are rotatably connected to the inner walls of both rotating frames 205. Torsion springs 208 are sleeved on the surfaces of both positioning rods 206. One end of the torsion spring 208 is fixedly connected to the surface of the positioning rod 206, and the other end is fixedly connected to the surface of the rotating frame 205. The surface of the neutral wire body 3 contacts the surfaces of the limit wheel 204 and the two guide wheels 207. With the auxiliary mechanism 2 in place, the lever 202 swings within the bracket 201 to adapt to cylinders 4 of different diameters, and the limit wheel 204 provides constraint. The neutral wire body 3 is positioned laterally, with two guide wheels 207 rotatably connected to the positioning rods 206 on both sides via torsion springs 208. One guide wheel 207 guides the neutral wire body 3 to turn, while the other guide wheel 207 presses against one end of the neutral wire body 3, ensuring that the neutral wire body 3 always adheres to the surface of the cylinder 4 and that the conductive part is always in contact with the cylinder 4. The two guide wheels 207 and the limiting wheel 204 are arranged laterally and are aligned with the axis of the cylinder 4, reducing the resistance when the cylinder 4 rotates. This eliminates the need to weld a grounding point onto the cylinder 4, protecting the integrity of the cylinder 4. The torsion springs 208 provide adaptive adjustment capability, forming an elastic clamp to prevent the neutral wire body 3 from loosening and falling off. The two guide wheels 207 automatically adjust their opening angle according to the size of the cylinder 4, ensuring that the neutral wire body 3 always maintains a moderate clamping force. This allows the neutral wire body 3 to continuously adhere to the cylinder 4 under dynamic working conditions, achieving low resistance and stable conduction in the welding negative electrode circuit, and improving the safety and reliability of submerged arc welding.

[0017] Reference Figure 2 The other end of the lever 202 is fixedly connected to a fixing ring 6, and the other end of the lever 202 is provided with a counterweight 8. The top of the counterweight 8 is fixedly connected to a hook 7. The hook 7 works in conjunction with the fixing ring 6. Through the setting of the fixing ring 6, the counterweight 8 and the hook 7, the counterweight 8 is suspended in the fixing ring 6 of the lever 202 through the hook 7. Through the gravity of the counterweight 8, the front end of the lever 202 naturally tilts up, thereby ensuring that the front limit wheel 204 and the guide wheel 207 always press against the surface of the cylinder 4, so as to achieve the fit between the auxiliary mechanism 2 and the bottom of the cylinder 4. By increasing or decreasing the weight of the counterweight 8, it can flexibly adapt to different specifications of cylinder 4 and cable tension requirements. Reference Figure 2An extension plate 9 is fixed to one end of the bracket 201, and a fixing frame 5 is fixedly connected to the top of the extension plate 9. By setting the extension plate 9 and the fixing frame 5, the part of the zero wire body 3 connected to the auxiliary mechanism 2 can be raised, so that the zero wire body 3 is kept parallel to the roller axis before entering the auxiliary mechanism 2, avoiding path deviation or separation caused by its own weight, and ensuring the stable embedding of the zero wire body 3 in the V-groove of the guide wheel 207 and the limit wheel 204. Reference Figure 4 An arc-shaped frame 11 is provided on the top of the fixed frame 5. The neutral wire body 3 passes through the arc-shaped frame 11 and the inner wall of the fixed frame 5. Through the setting of the arc-shaped frame 11, the neutral wire body 3 passes through and is clamped between the arc-shaped frame 11 and the inner wall of the fixed frame 5. The arc-shaped frame 11 forms a wrapping limit on the neutral wire body 3, preventing the neutral wire body 3 from shaking, shifting or falling out during operation, enhancing the stability of the connection between the neutral wire body 3 and the auxiliary mechanism 2, and avoiding the neutral wire body 3 from shifting due to vibration or tension. Reference Figure 4 Rubber pads 12 are fixedly connected to the inner walls of the arc frame 11 and the fixed frame 5. The surface of the rubber pad 12 is in contact with the surface of the neutral wire body 3. Through the setting of the rubber pad 12, the rubber pad 12 has elastic buffering and friction damping functions, preventing the neutral wire body 3 from sliding or detaching due to vibration during operation. The rubber pad 12 can also disperse the clamping pressure, avoid the metal structure from causing pressure or scratches to the outer sheath of the neutral wire body 3, protect the integrity of the neutral wire insulation layer, and enhance the limiting stability, so that the neutral wire body 3 always remains centered under dynamic working conditions. Reference Figure 4 The inner wall of the arc frame 11 is threaded with two bolts 10. The arc frame 11 is fixedly connected to the top of the fixed frame 5 by the bolts 10. The setting of the bolts 10 facilitates the installation and disassembly of the arc frame 11, enhances the clamping rigidity of the neutral wire body 3, and ensures that the neutral wire body 3 does not loosen or shift under vibration and high current welding conditions.

[0018] Working principle: In the submerged arc welding system, the welding torch is connected to the positive terminal of the welding power supply, and the steel pressure vessel cylinder 4 is connected to the negative terminal of the power supply to form a circuit. The neutral wire body 3 needs to be connected to the cylinder 4 at one end and to the neutral wire of the power grid at the other end to form a protective ground. If a live part inside the welding machine touches the cylinder 4 and causes leakage, a single-phase short circuit will be formed through the neutral wire body 3. The strong short circuit current will cause the protection device to quickly cut off the power supply to avoid electric shock and ensure the safety of personnel and equipment. The roller device 1 drives two rollers to rotate through the drive device. The rollers contact the outer wall of the cylinder 4 and generate friction, thereby driving the cylinder 4 to rotate smoothly around its axis, providing continuous and uniform rotational motion for circumferential submerged arc welding. This is existing technology and will not be elaborated further. Based on the bracket 201, the bracket 201 is placed... On one side of the roller device 1, a lever 202 that can swing around a pivot is installed inside the bracket 201. By suspending a counterweight 8 in the fixed ring 6 of the lever 202, one end of the auxiliary mechanism 2 of the lever 202 is raised to contact the bottom of the cylinder 4. First, the neutral wire body 3 is placed in the clamping channel between the fixed frame 5 and the arc frame 11. The arc frame 11 is fixed to the top of the fixed frame 5 by two bolts 10. The rubber pads 12 on the inner walls of the fixed frame 5 and the arc frame 11 form a flexible wrap around the neutral wire body 3, which limits the position and prevents wear. Then, one end of the neutral wire body 3 is extended forward. When the neutral wire body 3 enters the auxiliary device, it first enters one of the guide wheels 207. The guide wheel 207 is elastically connected to the positioning rod 206 by a torsion spring 208. The V-shaped groove on the surface of the connection provides initial support and guidance for the neutral wire body 3, guiding it to align with the axis of the cylinder 4. The neutral wire body 3 is then placed into the middle limiting wheel 204, which has a V-shaped groove to constrain its lateral position and prevent it from shifting during operation. Next, the neutral wire body 3 enters the guide wheel 207 on the other side. This guide wheel 207 also receives continuous elastic force from the torsion spring 208, which stably presses one end of the neutral wire against the surface of the cylinder 4, ensuring that the conductive part remains in close contact with the surface of the cylinder 4, forming a reliable negative electrode path for the welding circuit. Throughout the entire process, the two guide wheels 207 and the limiting wheel 204 work together. The front guide wheel 207 is responsible for steering guidance, the limit wheel 204 achieves centering positioning, and the rear guide wheel 207 completes the clamping contact. Combined with the adaptive adjustment capability of the torsion spring 208, the neutral wire body 3 always maintains the correct direction, appropriate tension, and stable conductivity under dynamic working conditions, effectively preventing detachment, jumping, or poor contact. Because the torsion spring 208 has adaptive adjustment capability, when the diameter of the cylinder 4 changes or the direction of the neutral wire body 3 deviates slightly, the two guide wheels 207 can rotate slightly around the positioning rod 206 to automatically adjust the opening angle and clamping force, always maintaining appropriate clamping and clamping of the neutral wire body 3, avoiding loosening, jumping, or detachment, and ensuring that the welding negative electrode circuit always conducts electricity with low resistance, stability, and reliability under the dynamic rotation of the cylinder 4.

[0019] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An auxiliary device for the neutral wire of submerged arc welding of pressure vessels, comprising a roller device (1), characterized in that: The top of the roller device (1) is rotatably connected to a cylinder (4), and the bottom of the cylinder (4) is provided with an auxiliary mechanism (2) and a neutral wire body (3); wherein, The auxiliary mechanism (2) includes a bracket (201), which is located on one side of the roller device (1). A lever (202) is rotatably connected to the top of the bracket (201) via a pivot. A mounting bracket (203) is fixedly connected to one end of the lever (202). A limit wheel (204) is rotatably connected to the inner wall of the mounting bracket (203). Two positioning rods (206) are fixedly connected to the inner wall of the mounting bracket (203). The surfaces of the two positioning rods (206) are all... A rotating frame (205) is rotatably connected to the inner wall of each of the two rotating frames (205), and a guide wheel (207) is rotatably connected to the inner wall of each of the two positioning rods (206). A torsion spring (208) is sleeved on the surface of each of the two positioning rods (206). One end of the torsion spring (208) is fixedly connected to the surface of the positioning rod (206), and the other end of the torsion spring (208) is fixedly connected to the surface of the rotating frame (205). The surface of the zero wire body (3) is in contact with the surface of the limiting wheel (204) and the two guide wheels (207).

2. The auxiliary device for the neutral wire of submerged arc welding of pressure vessels according to claim 1, characterized in that: The other end of the lever (202) is fixedly connected to a fixing ring (6), and the other end of the lever (202) is provided with a counterweight (8). The top of the counterweight (8) is fixedly connected to a hook (7), and the hook (7) is used in conjunction with the fixing ring (6).

3. The auxiliary device for the neutral wire of submerged arc welding of pressure vessels according to claim 1, characterized in that: An extension plate (9) is fixed to one end of the bracket (201), and a fixing frame (5) is fixedly connected to the top of the extension plate (9).

4. An auxiliary device for the neutral wire of submerged arc welding of pressure vessels according to claim 3, characterized in that: The top of the fixed frame (5) is provided with an arc frame (11), and the neutral wire body (3) penetrates to the inner wall of the arc frame (11) and the fixed frame (5).

5. An auxiliary device for the neutral wire of submerged arc welding of pressure vessels according to claim 4, characterized in that: The inner walls of the arc frame (11) and the fixed frame (5) are both fixedly connected with rubber pads (12), and the surface of the rubber pads (12) is in contact with the surface of the neutral wire body (3).

6. An auxiliary device for the neutral wire of submerged arc welding of pressure vessels according to claim 5, characterized in that: The inner wall of the arc frame (11) is threaded with bolts (10), and there are two bolts (10). The arc frame (11) is fixedly connected to the top of the fixed frame (5) by the bolts (10).

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