Collecting box girth welding ground wire connecting tool

Abstract

The utility model discloses a header girth welding ground wire connecting tool, and relates to the welding tool technical field, the header girth welding ground wire connecting tool comprises a header and a buckle, a fastening tool is installed in the buckle in a contact mode, a fastening screw is installed on the buckle in a threaded mode and used for extruding a fixing tool, the fastening tool comprises a fixing seat and a fastening ring, and the fixing seat is fixedly connected with the fastening ring. The fastening ring is cylindrical, a vent hole is formed in the fastening ring to prevent gas from being located between the header and the fastening ring when the fastening ring makes close contact with the header, and a fixing bolt is installed on the arc-shaped face of the fastening ring in a threaded mode and used for limiting the position of the fastening ring on the header. According to the device, the fastening ring and the fixing bolt are arranged on the fastening tool, so that the device can be quickly assembled and disassembled on the collecting box, welding spots and welding marks cannot be left on the outer wall of the collecting box when the fastening tool is assembled and disassembled, the working steps during welding are reduced, and the working efficiency of welding is improved.

Description

Technical Field

[0001] This utility model relates to the field of welding tooling technology, specifically to a tooling for connecting the ground wire in the circumferential weld of a header. Background Technology

[0002] In the boiler industry, the header is the main artery of steam and water circulation. The header is the transition component between the heated surface tubes and the steam pipeline. When the header end cover or splice ring weld is automatically welded, the header needs to be connected to the negative ground wire. In conventional welding, stiffening plates are welded to the end face of the header body or end cover, and the stiffening plates are connected to the ground wire by snap-fit. This method adds a pre-welding process to the workpiece when installing the stiffening plates, such as preheating, welding, stiffening plate removal, grinding of residual weld scars, and flaw detection. These processes are all non-value-added operations and seriously reduce the welding efficiency of workers.

[0003] Furthermore, when the weld is circumferentially welded, the header and the negative line are fixedly connected. Therefore, the rotation of the header will also cause the negative line to rotate. This will cause the negative line to become entangled or twisted during welding, which will not only increase the danger of welding, but also reduce the service life of the negative line. Utility Model Content

[0004] In view of the technical problems mentioned above, this utility model proposes the following technical solution:

[0005] A jig for connecting a ground wire in a header circumferential weld includes a header and a buckle. The clamping end of the buckle is U-shaped. A fastening fixture is installed inside the buckle. A fastening screw is threaded on the buckle to press the fastening fixture. The fastening fixture includes a fixing seat and a fastening ring. The fastening ring is cylindrical and has a vent hole to prevent gas from being trapped between the header and the fastening ring when they are in close contact. A fixing bolt is threaded on the arc-shaped surface of the fastening ring. The fixing bolt restricts the position of the fastening ring on the header and also ensures that the fastening ring is in close contact with the outer wall of the header.

[0006] Furthermore, the fixing base is made of I-beam steel, and one side of the fixing base is in close contact with the flat surface inside the buckle to conduct voltage. The fixing base is fixedly connected to the fastening ring.

[0007] Furthermore, a threaded post is fixedly installed at one end of the buckle, the threaded post is welded to the buckle, and a locking nut is provided at the end of the threaded post away from the buckle for a limiting function, the nut and the threaded post being connected by threads.

[0008] Furthermore, a grounding connector is provided on the threaded post, and the grounding connector is movably connected to the threaded post.

[0009] Furthermore, a grounding wire is provided on the grounding connector, and the grounding wire is fixed to the grounding connector by a wiring bolt.

[0010] The beneficial effects of this utility model compared with the prior art are: (1) By setting a fastening ring and fixing bolt on the fastening fixture, this device can be quickly installed and disassembled on the header. When installing and disassembling the fastening fixture, no welding points or welding marks will be left on the outer wall of the header, reducing the working steps during welding and improving the welding efficiency; (2) By allowing the ground wire connection seat to rotate and be restricted by the nut, the ground wire will not be wrapped in the submerged arc automatic welding process. In addition, by setting a washer between the nut and the ground wire connection seat, the friction between the ground wire connection seat and the nut is reduced. This not only improves the service life of the ground wire connection seat, but also reduces the occurrence of the nut being driven by the ground wire connection seat and thus rotating, improving the safety during use. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0012] Figure 2 This is a schematic diagram of the original welded stiffener plate structure.

[0013] Figure 3 This is a schematic diagram of the fastening fixture structure of this utility model.

[0014] Reference numerals: 101, header; 102, snap fastener; 103, threaded post; 104, grounding connector; 105, washer; 106, nut; 107, grounding wire; 108, fastening screw; 201, fixing seat; 202, fastening ring; 203, fixing bolt. Detailed Implementation

[0015] like Figure 1 , Figure 2As shown, a jig for connecting a ground wire in a header circumferential weld includes a header 101 and a clip 102. A threaded post 103 is fixedly installed at one end of the clip 102. The threaded post 103 is welded to the clip 102. A locking nut 106 is provided at the end of the threaded post 103 away from the clip 102 for a limiting function. The nut 106 is threadedly connected to the threaded post 103. A ground wire connection seat 104 is provided on the threaded post 103. The ground wire connection seat 104 is movably connected to the threaded post 103. The ground wire connection seat 104 is limited to the threaded post 103 by the nut 106. When it is necessary to replace the ground wire 107 or adjust its tightness, the nut 106 can be rotated for disassembly or adjustment. The contact position between the nut 106 and the ground wire connection seat 104 is designed to... A washer 105 is provided to reduce friction. The washer 105 is made of rubber. During the circumferential welding process, the threaded post 103 rotates within the grounding connector 104. Therefore, the washer 105 not only reduces the friction between the grounding connector 104 and the nut 106, but also prevents the grounding connector 104 from causing the nut 106 to rotate, thus preventing the grounding connector 104 from becoming loose. Four-fifths of the contact area between the grounding connector 104 and the threaded post 103 is unthreaded. This is to ensure that the grounding connector 104 and the threaded post 103 can maintain a certain contact area, thereby ensuring that the voltage can pass normally. A grounding wire 107 is provided on the grounding connector 104. The grounding wire 107 is fixed to the grounding connector 104 by a wiring bolt, which facilitates the removal and replacement of the grounding wire 107.

[0016] The clamping end of the buckle 102 is U-shaped. A fastening fixture is installed inside the buckle 102. A fastening screw 108 is threaded on the buckle 102 to press the fastening fixture. When disassembling or installing the fastening fixture, simply rotate the fastening screw 108 to disengage it from the fastening fixture for replacement. During installation, the fastening fixture needs to be pressed by the fastening screw 108 so that one plane of the fastening fixture is in close contact with the buckle 102 for conducting voltage.

[0017] The fastening fixture includes a fixed base 201 and a fastening ring 202. The fixed base 201 is an I-beam steel, and one side of the fixed base 201 is in close contact with the inner plane of the buckle 102 to conduct voltage. The fixed base 201 is fixedly connected to the fastening ring 202, and the fixed base 201 is welded to the fastening ring 202. The fastening ring 202 is cylindrical and has a vent hole to prevent gas from being trapped between the header 101 and the fastening ring 202 when the fastening ring 202 is in close contact with the header 101. A fixing bolt 203 is threaded onto the arc-shaped surface of the fastening ring 202. The fixing bolt 203 is used to limit the position of the fastening ring 202 on the header 101, and at the same time, the fixing bolt 203 also ensures that the fastening ring 202 is in close contact with the outer wall of the header 101. 2. During installation, the inner arc-shaped wall of the fastening ring 202 is in close contact with the outer arc-shaped wall of the header 101, and the inner end face of the fastening ring 202 is in close contact with the end face of the header 101. This ensures the stability of voltage conduction during welding. The fastening ring 202 can be divided into various models according to different diameters, corresponding to products with different outer diameters of the header 101. For example, the outer diameter of the header 101 body is 219mm, 273mm, 325mm, 377mm, etc. The inner wall diameter of the fastening ring 202 in the fastening fixture is also 219mm, 273mm, 325mm, 377mm, etc. It is worth noting that the gap between the inner diameter of the fastening ring 202 and the outer diameter of the header 101 needs to be controlled at 2mm on one side. This is set for the convenience of installation.

Claims

1. A fixture for connecting a ground wire to a header circumferential weld, comprising a header (101) and a clip (102), characterized in that: The clamping end of the buckle (102) is U-shaped. A fastening fixture is installed inside the buckle (102). A fastening screw (108) is threaded on the buckle (102) to press the fastening fixture. The fastening fixture includes a fixing seat (201) and a fastening ring (202). The fastening ring (202) is cylindrical. A vent hole is provided on the fastening ring (202) to prevent gas from being present between the header (101) and the fastening ring (202) when the fastening ring (202) is in close contact with the header (101). A fixing bolt (203) is threaded on the arc surface of the fastening ring (202). The fixing bolt (203) is used to limit the position of the fastening ring (202) on the header (101). At the same time, the fixing bolt (203) also allows the fastening ring (202) to be in close contact with the outer wall of the header (101).

2. The fixture for connecting the ground wire of the circumferential weld of a header according to claim 1, characterized in that: The fixing seat (201) is an I-beam steel. One side of the fixing seat (201) is in close contact with the plane inside the buckle (102) to conduct voltage. The fixing seat (201) is fixedly connected to the fastening ring (202).

3. The fixture for connecting the ground wire in the circumferential weld of a header according to claim 1, characterized in that: One end of the buckle (102) is fixedly installed with a threaded post (103), the threaded post (103) is welded to the buckle (102), and a locking nut (106) is provided at the end of the threaded post (103) away from the buckle (102) for the purpose of limiting. The nut (106) is connected to the threaded post (103) by threads.

4. The fixture for connecting the ground wire of the circumferential weld of a header according to claim 3, characterized in that: A grounding connector (104) is provided on the threaded post (103), and the grounding connector (104) is movably connected to the threaded post (103).

5. The fixture for connecting the ground wire of the header circumferential weld according to claim 4, characterized in that: The grounding connector (104) is provided with a grounding wire (107), and the grounding wire (107) is fixed to the grounding connector (104) by a wiring bolt.

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