CN113594724A

CN113594724A - Ground wire connecting device for submerged arc welding

Info

Publication number: CN113594724A
Application number: CN202010360530.2A
Authority: CN
Inventors: 王建才; 晏利君; 张�杰; 祝鹏; 董俊军; 鲁克莹; 张志远
Original assignee: China Oil Pipeline Machinery Manufacturing Co ltd; China National Petroleum Corp; China Petroleum Pipeline Engineering Corp
Current assignee: China Oil Pipeline Machinery Manufacturing Co ltd; China National Petroleum Corp; China Petroleum Pipeline Engineering Corp
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2021-11-02
Anticipated expiration: 2040-04-30
Also published as: CN113594724B

Abstract

The present disclosure provides a ground wire connection device for submerged arc welding, which belongs to the technical field of submerged arc welding. The connecting device includes a rotating shaft, a clamping assembly and a grounding wire connecting assembly for connecting with the grounding wire, the clamping assembly includes a connecting body and a clamping piece, and the connecting body is detachably fixed on the first end of the rotating shaft, The clamping part of the clamping piece is located in the connecting body and forms a clamping distance with the connecting body for clamping the equipment to be welded; the clamping part is used to adjust the size of the clamping distance; The graphite body is rotatably sleeved on the rotating shaft near the second end, the connecting lug plate is located on the outer wall of the graphite body, and the rotating shaft, the connecting body and the connecting lug plate are all conductors. The connection device provided by the present disclosure can keep the ground wire in a relatively static state all the time, so as to avoid problems such as loosening, falling off or winding of the ground wire.

Description

Ground wire connecting device for submerged arc welding

Technical Field

The disclosure belongs to the technical field of submerged arc welding, and particularly relates to a ground wire connecting device for submerged arc welding.

Background

In the process of welding operation by submerged arc welding, a connection device is usually used to connect a ground wire with a device to be welded, so that the device to be welded is grounded through the ground wire, and a loop is formed between the device to be welded and a welding power supply to prevent an operator from being injured by a leakage current.

In the related art, a connecting device such as a metal lug, a ground clamp, or a lever clamp is generally used to connect a device to be soldered and a ground wire, thereby tightly connecting the device to be soldered and the ground wire.

However, under the working conditions of vibration, movement, rotation and the like of the welded equipment, the grounding wire is easy to loosen, fall off and wind or is easy to cause friction ignition, so that the problem of arc leakage caused by poor contact between the welded equipment and the grounding wire is easy to cause.

Disclosure of Invention

The embodiment of the disclosure provides a grounding wire connecting device for submerged arc welding, which can enable a grounding wire to be kept in a relatively static state all the time, thereby avoiding the problem of arc leakage caused by poor contact between a welded device and the grounding wire. The technical scheme is as follows:

the embodiment of the disclosure provides a ground wire connecting device for submerged arc welding, connecting device includes axis of rotation, centre gripping subassembly and is used for the ground wire coupling assembling that links to each other with the ground wire, wherein:

the clamping assembly comprises a connecting body and a clamping piece, the connecting body is detachably fixed on the first end of the rotating shaft, a clamping part of the clamping piece is positioned in the connecting body, a clamping interval for clamping the welded equipment is formed between the clamping part and the connecting body, and the clamping part is used for adjusting the clamping interval;

the grounding wire connecting assembly comprises a connecting lug plate and a graphite body, the graphite body is rotatably sleeved on the position, close to the second end, of the rotating shaft, and the connecting lug plate is located on the outer wall of the graphite body;

the rotating shaft, the connecting body and the connecting lug plate are all conductors.

Optionally, the connecting body is a U-shaped rotating plate, a vertical plate of the connecting body is detachably fixed to a position, close to the first end, on the rotating shaft, the clamping piece is located on a first transverse plate of the connecting body, and the clamping space is formed between the clamping piece and a second transverse plate of the connecting body.

Optionally, two nuts are disposed on the rotating shaft at a position close to the first end, and the vertical plate of the connecting body is clamped between the two nuts.

Optionally, be provided with the first screw hole that runs through two faces of self perpendicularly on the first diaphragm, the holder includes screw ejector pin and stripper plate, the screw ejector pin with first screw hole screw-thread fit, the stripper plate is the clamping part of holder, the stripper plate is located the first end tip of screw ejector pin, the stripper plate with the screw ejector pin is perpendicular, just the stripper plate is located first diaphragm with between the second diaphragm.

Optionally, the second end of the threaded post rod is provided with a screwing handle, and the first cross plate is located between the screwing handle and the extrusion plate.

Optionally, a plate surface of the first transverse plate, which faces away from the second transverse plate, is provided with a reinforcing block, and the threaded top rod is inserted into the reinforcing block.

Optionally, the graphite body is externally sleeved with a sleeve, the sleeve is a conductor, and the connecting lug plate is located on the peripheral wall of the sleeve.

Optionally, two insulating rings are coaxially sleeved on the rotating shaft, and the two insulating rings are respectively located on two sides of the sleeve.

Optionally, one side of each insulating ring, which faces away from the sleeve, is fixedly provided with a retaining ring, and each retaining ring is coaxially sleeved on the rotating shaft.

Optionally, two limit blocks are detachably arranged on the rotating shaft, and the graphite body is located between the two limit blocks.

The technical scheme provided by the embodiment of the disclosure has the following beneficial effects:

for the ground wire connecting device for submerged arc welding provided by the embodiment of the disclosure, on one hand, the connecting body is detachably fixed on the first end of the rotating shaft, the clamping part of the clamping piece is positioned in the connecting body and forms a clamping distance for clamping the welded equipment with the connecting body, and the clamping part is used for adjusting the clamping distance, so that the welded equipment can be fixed by adjusting the clamping distance, and further the fixed connection between the welded equipment and the first end of the rotating shaft is realized.

In the second aspect, the graphite body rotationally the suit is close to the position of second end in the axis of rotation, the engaging lug is located the outer wall of the graphite body, thereby connect the earth connection through the engaging lug, the second end that realizes the axis of rotation is connected with the rotation of earth connection, the equipment that is welded can not influence the earth connection when rotating along with holder and connector so, just also can make the earth connection keep the state of relative rest always, and then just can not make the earth connection appear easily not hard up yet, drop, the winding or easily arouse the problem that the friction was struck sparks.

Furthermore, the rotating shaft, the connecting body and the connecting lug plate are all conductors, and the rotating shaft can still realize the electric connection between the rotating shaft and the connecting lug plate when rotating in a friction mode in the graphite body, so that the electric connection between the welded equipment and the grounding wire can be finally realized.

That is to say, the ground wire connecting device for submerged arc welding that this disclosure provided can make the ground wire keep the state of relative static all the time to avoid causing the poor contact between equipment to be welded and the ground wire and arousing the problem of arc leakage.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a grounding wire connection device for submerged arc welding according to an embodiment of the present disclosure;

fig. 2 is an assembly schematic view of a ground wire connection assembly provided by an embodiment of the present disclosure;

fig. 3 is a right side view of a ground wire connection assembly provided by an embodiment of the present disclosure.

The symbols in the drawings represent the following meanings:

1. a rotating shaft; 11. a limiting block; 12. an insulating ring; 121. a retainer ring; 13. a nut; 14. a first thread segment; 15. a middle optical axis segment; 16. a second thread segment;

2. a clamping assembly; 21. a linker; 211. a vertical plate; 2111. a second through hole; 212. a first transverse plate; 2121. a threaded hole; 2122. a reinforcing block; 213. a second transverse plate; 22. a clamping member; 221. a threaded ejector rod; 2211. screwing the handle; 2212. a first through hole; 2213. a limiting ring; 2214. a pin shaft; 222. a pressing plate; 23. clamping the spacing;

3. a ground wire connecting assembly; 31. connecting the ear plates; 311. a connecting bolt; 312. a wiring hole; 32. a graphite body; 33. a sleeve;

100. and (7) a gasket.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a ground wire connection device for submerged arc welding according to an embodiment of the present disclosure, and as shown in fig. 1, the connection device includes a rotating shaft 1, a clamping assembly 2, and a ground wire connection assembly 3 for connecting to a ground wire, where:

the clamping assembly 2 comprises a connecting body 21 and a clamping piece 22, the connecting body 21 is detachably fixed on the first end of the rotating shaft 1, a clamping part of the clamping piece 22 is positioned in the connecting body 21 and forms a clamping interval 23 used for clamping the welded equipment with the connecting body 21, and the clamping part is used for adjusting the size of the clamping interval 23.

The grounding wire connecting assembly 3 comprises a connecting lug plate 31 and a graphite body 32, the graphite body 32 is rotatably sleeved on the rotating shaft 1 at a position close to the second end, and the connecting lug plate 31 is positioned on the outer wall of the graphite body 32.

The rotary shaft 1, the connecting body 21 and the connection lug plate 31 are all conductors.

For the ground wire connecting device for submerged arc welding provided by the embodiment of the disclosure, on one hand, the connecting body 21 is detachably fixed on the first end of the rotating shaft 1, the clamping portion of the clamping piece 22 is located in the connecting body 21 and forms a clamping gap 23 for clamping the welded equipment with the connecting body 21, and the clamping portion is used for adjusting the size of the clamping gap 23, so that the welded equipment can be fixed by adjusting the clamping gap 23, and further, the fixed connection of the welded equipment and the first end of the rotating shaft 1 is realized.

In the second aspect, the graphite body 32 rotationally the suit is close to the position of second end on the axis of rotation 1, it is located the outer wall of graphite body 32 to connect the earth connection to connect the otic placode 31 through connecting, the second end that realizes axis of rotation 1 is connected with the rotation of earth connection, can not influence the earth connection when being welded equipment along with holder 22 and connector 21 rotation so, just also can make the earth connection keep the state of relative rest always, and then just can not make the earth connection appear easily not hard up yet, drop, the winding or easily arouse the problem that the friction was struck sparks.

Further, the rotating shaft 1, the connecting body 21 and the connecting lug plate 31 are all conductors, and the rotating shaft 1 can still realize the electrical connection between the two when rotating in friction in the graphite body 32, and finally realize the electrical connection between the welded equipment and the grounding wire.

In addition, the ground wire connecting device for submerged arc welding provided by the disclosure has the advantages of compact structure, reliable connection, good self-locking performance of the clamping piece 22, convenience in mounting and dismounting, large clamping force and clamping stroke, and suitability for clamping and grounding of equipment with different wall thicknesses.

And, the clamping component 2 can be along with the equipment automatic rotation that is welded, and earth connection coupling assembling 3 and earth connection do not rotate along with the equipment that is welded, and the earth connection keeps the inaction state, reduces electric arc striking sparks and earth connection not hard up, drops or twines, and safe reliability is high, guarantees that the electric current is stable to be conducted, has solved and has caused electric arc striking sparks because of contact failure between equipment that is welded and the earth connection and has burnt the equipment surface, local breakdown scheduling problem, has improved production safety and product quality.

In this embodiment, the connecting body 21 is a U-shaped rotating plate, the vertical plate 211 of the connecting body 21 is detachably fixed on the rotating shaft 1 near the first end, the clamping member 22 is located on the first horizontal plate 212 of the connecting body 21, and the clamping space 23 is formed between the clamping member 22 and the second horizontal plate 213 of the connecting body 21.

In the above embodiment, the connecting body 21 is a U-shaped rotating plate, so that the clamping member 22 and the second horizontal plate 213 form the clamping distance 23, thereby clamping and fixing the welded device.

Illustratively, the connecting body 21 may be made of three brass steel plates by welding.

Alternatively, the rotating shaft 1 has two nuts 13 at a position near the first end, and the vertical plate 211 of the connecting body 21 is sandwiched between the two nuts 13.

In the above embodiment, by the fitting of the two nuts 13 to the rotating shaft 1, not only the rotating shaft 1 can be firmly fixed to the vertical plate 211, but also the vertical plate 211 and the rotating shaft 1 can be easily detached. When the size of the welded equipment is larger, the two nuts 13 can be disassembled, so that the connecting body 21 with larger size can be replaced, and the application range of the connecting device can be enlarged.

Illustratively, a second through hole 2111 is formed in the vertical plate 211, and a first end of the rotating shaft 1 is inserted into the second through hole 2111 and passes through the second through hole 2111.

Illustratively, the two nuts 13 are locknuts.

In the above embodiment, the locknut may play a role of locking. That is, even if the welding equipment rotates the connection body 21, the two locknuts 13 can tightly connect the riser 211 of the connection body 21 and the rotation shaft 1.

Illustratively, a gasket 100 is disposed on one side of each nut 13 facing the vertical plate 211, each gasket 100 is coaxially sleeved on the rotating shaft 1, and each gasket 100 abuts against the plate surface of the vertical plate 211.

In the above embodiment, the spacer 100 can prevent the nut 13 from damaging the riser 211 during clamping of the riser 211, thereby extending the service life of the riser 211.

Illustratively, the washer 100 and the two nuts 13 may both be machined from a brass material.

With reference to fig. 1, the first horizontal plate 212 is provided with a first threaded hole 2121 vertically penetrating through two plate surfaces of the first horizontal plate, the clamping member 22 includes a threaded rod 221 and an extrusion plate 222, the threaded rod 221 is in threaded fit with the first threaded hole 2121, the extrusion plate 222 is a clamping portion of the clamping member 22, the extrusion plate 222 is located at a first end of the threaded rod 221, the extrusion plate 222 is perpendicular to the threaded rod 221, and the extrusion plate 222 is located between the first horizontal plate 212 and the second horizontal plate 213.

In the above embodiment, the threaded mandril 221 is in threaded fit with the first threaded hole 2121, so that the position of the extrusion plate 222 can be adjusted, and the size of the clamping interval 23 can be changed, thereby being suitable for clamping devices to be welded with different thicknesses.

Illustratively, both the threaded mandrel 221 and the extrusion plate 222 may be machined from a brass bar.

Optionally, the pressing plate 222 is provided with a jaw toward the plate surface of the second horizontal plate 213.

In the above embodiment, the jaws are a plurality of V-shaped grooves arranged in parallel to form a curved surface, so that the problem of relative sliding during contact can be avoided, and the pressing plate 222 can clamp the welded device more firmly.

For example, the surface of the second horizontal plate 213 facing the pressing plate 222 may be similarly formed with a jaw, so as to better clamp the welded device through the two-jaw structure. When the welded equipment needs to be clamped, the welded equipment is arranged between the two jaw positions, and then the threaded mandril 221 is driven to rotate, so that the welded equipment is fixedly clamped between the extrusion plate 222 and the second transverse plate 213. When the welded equipment needs to be disassembled, the pressing plate 222 is moved upwards by driving the threaded mandril 221 to rotate.

Optionally, the threaded top bar 221 has a screw handle 2211 on a second end, and the first cross plate 212 is located between the screw handle 2211 and the compression plate 222.

In the above embodiment, on the one hand, the screwing handle 2211 is used to apply a tightening force to the threaded mandril 221, which also facilitates adjustment of the size of the clamping distance 23. On the other hand, the screwing handle 2211 can prevent the threaded top rod 221 from passing through the transverse plate, and plays a role in limiting.

Illustratively, a first through hole 2212 is arranged at one end of the threaded top rod 221, which faces away from the other transverse plate, the first through hole 2212 is perpendicular to the axis of the threaded top rod 221, and the screwing handle 2211 is inserted into the first through hole 2212.

Illustratively, the left end of the screwing handle 2211 is coaxially fixed and sleeved with a limiting ring 2213, the right end of the screwing handle 2211 is detachably inserted with a pin 2214, the limiting ring 2213 and the pin 2214 respectively limit two ends of the screwing handle 2211, and the screwing handle 2211 is prevented from passing through the first through hole 2212. When the screwing handle 2211 needs to be rotated, the right end of the screwing handle 2211 firstly passes through the first through hole 2212, then the pin shaft 2214 is inserted, and finally the screwing handle 2211 is rotated. When the screw handle 2211 needs to be disassembled, the pin 2214 is disassembled first, and then the screw handle 2211 is removed from the first through hole 2212.

Illustratively, the twist grip 2211 may be machined from a carbon steel material into the bolt structure.

In other embodiments of the present disclosure, the threaded rod 221 may also be in transmission connection with an output shaft of a motor, so that the motor drives the threaded rod 221 to rotate, thereby saving manpower. Or the top end of the threaded top rod 221 is configured to be an outer hexagonal structure, so that the threaded top rod 221 can be driven to rotate by a wrench, which is not limited by the present disclosure.

Optionally, the surface of the first horizontal plate 212 facing away from the second horizontal plate 213 has a reinforcing block 2122, and the threaded top rod 221 is inserted into the reinforcing block 2122.

In the above embodiment, the reinforcing block 2122 has a function of reinforcing and fixing the threaded mandril 221, and the first transverse plate 212 and the reinforcing block 2122 can simultaneously reinforce and fix the threaded mandril 221, so that the threaded mandril 221 can be more stable when rotated and locked.

In this embodiment, the reinforcing block 2122 may be a first nut that is threadedly engaged with the threaded mandril 221.

In the above embodiment, the threaded top rod 221 is matched with the first transverse plate 212 and the first nut, and the threaded top rod 221 can freely and spirally lift and self-lock, so that the clamping device is suitable for clamping welded equipment with different wall thicknesses and can apply enough clamping force. In addition, the threaded top rod 221 is matched with the first transverse plate 212 and the first nut, has reliable self-locking performance in a clamping state, is firmly clamped on the welded equipment, can prevent the welded equipment and the grounding wire from falling off or loosening, and reduces the problems of poor contact and the like.

Illustratively, the first nut may be machined from a brass material.

Illustratively, the first nut and the first cross plate 212 are welded together.

In the above embodiment, the first nut and the first transverse plate 212 are welded together, so that the connection strength between the first nut and the first transverse plate 212 can be increased.

Fig. 2 is an assembly schematic diagram of a ground wire connection assembly provided in an embodiment of the present disclosure, and as shown in fig. 2, a graphite body 32 is sleeved with a sleeve 33, the sleeve 33 is a conductor, and the connection lug plate 31 is located on an outer circumferential wall of the sleeve 33.

In the above embodiment, on the one hand, the sleeve 33 serves to protect the graphite body 32, and on the other hand, the sleeve 33 is provided with the connecting lug 31 for easy arrangement.

Illustratively, the graphite body 32 may be a cylindrical structural member, the sleeve 33 and the graphite body 32 are assembled into a whole in a clearance fit manner, and both ends of the sleeve 33 and the graphite body 32 are flush. In other embodiments of the present disclosure, the graphite body 32 may also be square, as the present disclosure is not limited thereto.

In addition, the rotating shaft 1 comprises a first thread section 14, an intermediate optical axis section 15 and a second thread section 16 which are coaxially and sequentially arranged from left to right, one end of the intermediate optical axis section 15 is connected with the first thread section 14, and the other end of the intermediate optical axis section 15 is connected with the second thread section 16. The shaft shoulders among the first thread section 14, the second thread section 16 and the middle optical shaft section 15 are subjected to transition rounding treatment, and the rounding radius is 2 mm. The sleeve 33 and the graphite body 32 are coaxially sleeved on the outer peripheral wall of the middle optical axis section 15 after being assembled into a whole, and the axial length of the sleeve 33 is equal to the axial length of the middle optical axis section 15.

Illustratively, the graphite body 32 may be made from extruded graphite particles. The sleeve 33 may be machined from a carbon steel tube.

In this embodiment, the inner diameter of the graphite body 32 is 0.5mm larger than the outer diameter of the central optical axis segment 15 of the shaft 1, thereby facilitating the rotation of the shaft 1 without affecting the rotation of the graphite body 32 and the sleeve 33.

Alternatively, two insulating rings 12 are coaxially sleeved on the rotating shaft 1, and the two insulating rings 12 are respectively located at two sides of the sleeve 33.

In the above embodiment, the insulating ring 12 insulates the sleeve 33 in the radial direction, and the graphite body 32 also has an insulating function, so that the sleeve 33 can be insulated in the axial direction. That is, the insulating ring 12 and the graphite body 32 insulate the sleeve 33 in the axial direction and the radial direction, respectively, so that the sleeve 33 can be prevented from generating the arc friction ignition problem during the rotation of the rotating shaft 1.

Illustratively, the insulating rings 12 may be made of a wear-resistant insulating material, and each insulating ring 12 may have an outer diameter equal to the outer diameter of the sleeve 33, and the inner diameter of the insulating ring 12 is at least 1mm larger than the outer diameter of the threaded section of the rotating shaft 1.

Optionally, a retaining ring 121 is fixedly disposed on a side of each insulating ring 12 facing away from the sleeve 33, and each retaining ring 121 is coaxially sleeved on the rotating shaft 1.

In the above embodiment, the retainer ring 121 is conveniently provided with the insulating ring 12, which serves to protect the insulating ring 12 and prevent the insulating ring 12 from being worn and deformed by force.

Illustratively, the retainers 121 may be machined from a carbon steel plate, the outer diameter of the retainers 121 may be the same as the outer diameter of the sleeve 33, one retainer 121 is disposed on the first thread segments 14 and the other retainer 121 is disposed on the second thread segments 16, and the inner diameter of each retainer 121 is at least 1mm greater than the outer diameter of the corresponding shaft 1 to facilitate rotation of the shaft 1.

With continued reference to fig. 2, two stoppers 11 are detachably disposed on the rotating shaft 1, and the graphite body 32 is located between the two stoppers 11.

In the above embodiment, the two stoppers 11 serve to limit the graphite body 32, thereby preventing the axial movement of the ground wire.

Illustratively, the stop block 11 may be a second nut, and a second nut coaxially sleeved on the first threaded section 14 and threadedly engaged with the first threaded section 14. Another second nut is coaxially disposed over the second threaded segment 16 and is in threaded engagement with the second threaded segment 16. That is, the graphite body 32 and the sleeve 33 are limited on the middle optical axis section 15 by the limitation of the two second nuts, and the axial displacement of the graphite body 32 and the sleeve 33 is avoided.

In addition, one gasket 100 is arranged on one side of each second nut facing the graphite body 32, and each gasket 100 is sleeved on the rotating shaft 1, so that the second nut is prevented from wearing the graphite body 32.

Illustratively, both second nuts and washers 100 may be machined from a brass material.

Illustratively, two retaining rings 121 are arranged between the two second nuts, so that a stop of the retaining rings 121 is achieved.

Exemplarily, after the graphite body 32, the sleeve 33, the engaging lug plate 31, the insulating ring 12 and the retainer ring 121 are assembled in sequence, the graphite body 32 is tightly assembled on the rotating shaft 1 by adopting a second nut and a gasket 100, the assembling clearance between the graphite body 32 and the rotating shaft 1 and between the graphite body 32 and the insulating ring 12 is not less than 0.5mm, the rotating shaft 1 can rotate freely by 360 degrees without driving the graphite body 32, the sleeve 33 and the engaging lug plate 31 to rotate, the grounding wire can not be rotated, and therefore the problem of arc leakage caused by poor contact between the welded equipment and the grounding wire is avoided.

Fig. 3 is a right side view of the grounding wire connecting assembly provided by the embodiment of the disclosure, and as shown in fig. 3, at least one connecting bolt 311 is inserted into the connecting lug plate 31, and each connecting bolt 311 is used for connecting the grounding wire and the connecting lug plate 31.

In the above embodiment, the connection bolt 311 functions to connect the ground wire and the connection lug plate 31, thereby achieving stable connection of the ground wire and the connection device.

Illustratively, the connecting lug plate 31 may be machined from a carbon steel plate and the connecting bolt 311 may be machined from a brass material.

Alternatively, the engaging lug plate 31 is welded to the outer wall of the sleeve 33 with its plate surface parallel to the axis of the sleeve 33.

In the above embodiment, the connection lug plate 31 and the sleeve 33 are welded together, so that the connection strength of the connection lug plate 31 and the sleeve 33 can be increased.

Illustratively, the connection lug plate 31 is provided with two spaced connection holes 312, and each connection hole 312 is inserted with a connection bolt 311.

In the above embodiment, the two connection bolts 311 may make the connection of the ground wire and the connection device more stable.

Illustratively, first, the ground wire is firmly connected to the connection lug plate 31 by the connection bolt 311. Then, the threaded plunger 221 is rotated by screwing the handle 2211 so that the clamping gap 23 reaches a maximum. Next, the device to be welded is arranged between the pressing plate 222 and the second cross plate 213. Finally, the threaded top rod 221 is rotated again by screwing the handle 2211, so that the device to be welded is firmly clamped in the clamping space 23, and the connection of the grounding wire and the device to be welded is completed.

Illustratively, both sides of the top of the connection lug plate 31 are rounded.

In the above embodiment, both sides of the top of the connection lug plate 31 are rounded, so that the connection lug plate 31 can be prevented from cutting other devices.

Illustratively, the radius of the rounded corners may be 10 mm.

The working principle of the connecting device is briefly explained below:

on the one hand, connecting body 21 detachably fixes on the first end of axis of rotation 1, and the clamping part of holder 22 be located connecting body 21 and form the centre gripping interval 23 that is used for the centre gripping equipment that is welded between connecting body 21, the clamping part is used for adjusting the size of centre gripping interval 23 to can fix the equipment that is welded through adjusting centre gripping interval 23, and then realize the fixed connection of the equipment that is welded and the first end of axis of rotation 1. In the second aspect, the graphite body 32 rotationally the suit is close to the position of second end on the axis of rotation 1, it is located the outer wall of graphite body 32 to connect the earth connection to connect the otic placode 31 through connecting, the second end that realizes axis of rotation 1 is connected with the rotation of earth connection, can not influence the earth connection when being welded equipment along with holder 22 and connector 21 rotation so, just also can make the earth connection keep the state of relative rest always, and then just can not make the earth connection appear easily not hard up yet, drop, the winding or easily arouse the problem that the friction was struck sparks.

The above description is intended to be exemplary only and not to limit the present disclosure, and any modification, equivalent replacement, or improvement made without departing from the spirit and scope of the present disclosure is to be considered as the same as the present disclosure.

Claims

1. A ground wire connection device for submerged arc welding, characterized in that the connection device comprises a rotating shaft (1), a clamping assembly (2) and a ground wire connection assembly (3) for being connected with the ground wire ),in:

The clamping assembly (2) includes a connecting body (21) and a clamping member (22), the connecting body (21) is detachably fixed on the first end of the rotating shaft (1), and the clamping member (22) is The clamping part of the holder (22) is located in the connecting body (21) and forms a clamping distance (23) with the connecting body (21) for clamping the equipment to be welded, the clamping part for adjusting the size of the clamping distance (23);

The ground wire connection assembly (3) includes a connection lug plate (31) and a graphite body (32), and the graphite body (32) is rotatably sleeved on the rotating shaft (1) at a position close to the second end, so The connecting lugs (31) are located on the outer wall of the graphite body (32);

The rotating shaft (1), the connecting body (21) and the connecting lug plate (31) are all conductors.

2 . The connecting device according to claim 1 , wherein the connecting body ( 21 ) is a U-shaped rotating plate, and the vertical plate ( 211 ) of the connecting body ( 21 ) is detachably fixed on the rotating plate. 3 . At a position on the shaft (1) close to the first end, the clamping member (22) is located on the first transverse plate (212) of the connecting body (21), and the clamping member (22) is connected to the The clamping distance (23) is formed between the second transverse plates (213) of the connecting body (21).

3. The connecting device according to claim 2, characterized in that, there are two nuts (13) on the rotating shaft (1) near the first end, and the vertical plate of the connecting body (21) has two nuts (13). (211) is sandwiched between the two nuts (13).

4. The connecting device according to claim 2, characterized in that, the first transverse plate (212) is provided with a first threaded hole (2121) vertically penetrating through the two plate surfaces of the first transverse plate (212), and the clamping member (22) ) comprises a threaded ejector rod (221) and a pressing plate (222), the threaded ejector rod (221) is threadedly matched with the first threaded hole (2121), and the pressing plate (222) is used for the clamping The clamping part of the piece (22), the pressing plate (222) is located at the first end of the threaded ejector rod (221), and the pressing plate (222) is connected to the threaded ejector rod (221). Vertical, and the pressing plate (222) is located between the first transverse plate (212) and the second transverse plate (213).

5. The connecting device according to claim 4, characterized in that, a screw handle (2211) is provided on the second end of the threaded ejector rod (221), and the first transverse plate (212) is located on the Twist between the handle (2211) and the pressing plate (222).

6. The connecting device according to claim 4, characterized in that, a plate surface of the first transverse plate (212) facing away from the second transverse plate (213) has a reinforcing block (2122), and the threaded ejector rod (221) is inserted into the reinforcing block (2122).

7. The connection device according to claim 1, wherein the graphite body (32) is provided with a sleeve (33), the sleeve (33) is a conductor, and the connection lug (31) on the outer peripheral wall of the sleeve (33).

8 . The connecting device according to claim 7 , wherein two insulating rings ( 12 ) are coaxially sleeved on the rotating shaft ( 1 ), and the two insulating rings ( 12 ) are respectively located in the on both sides of the sleeve (33).

9 . The connecting device according to claim 8 , wherein a retaining ring ( 121 ) is fixedly provided on the side of each insulating ring ( 12 ) facing away from the sleeve ( 33 ). The rings (121) are all coaxially sleeved on the rotating shaft (1).

10. The connection device according to any one of claims 1-9, characterized in that, two limit blocks (11) are detachably arranged on the rotating shaft (1), and the graphite body (32) between the two limit blocks (11).