CN214291317U

CN214291317U - Conventional submerged-arc automatic welding gun for welding thick-wall small-angle groove

Info

Publication number: CN214291317U
Application number: CN202023301455.7U
Authority: CN
Inventors: 蒋国辉; 单孟赟; 刘新儒; 于成科; 赵祥; 刘树权
Original assignee: China Petroleum First Construction Corp
Current assignee: China Petroleum First Construction Corp
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-09-28
Anticipated expiration: 2030-12-31

Abstract

The utility model discloses a conventional submerged arc automatic weld welder for welding of thick wall low-angle groove, it includes that barral of a gun, body of a gun and electric conduction chew, the bottom of barral of a gun is connected with the body of a gun, just the electric conduction is installed to the bottom of the body of a gun and is chewed, barral of a gun and body of a gun and electric conduction are threaded connection between chewing. The welding gun is easy to purchase and process, and low in cost; the conductive nozzle is more durable, and the maintenance cost is low; the method can be used for welding the thick-wall small-angle groove by a conventional submerged arc automatic welding machine, greatly reduces cutting cost, welding material cost, welding labor cost and occupation cost of various auxiliary devices, and shortens the construction period; has reliable practicability, extremely high universality, considerable economy and extremely high popularization.

Description

Conventional submerged-arc automatic welding gun for welding thick-wall small-angle groove

Technical Field

The utility model belongs to the technical field of the automatic submerged arc welding technique and specifically relates to a conventional automatic submerged arc welding welder that is used for thick wall low-angle groove welding is related to.

Background

When thick-wall metal products are welded, the production efficiency can be greatly improved by using submerged automatic arc welding, but the conventional submerged automatic arc welding gun adopts a large-angle groove, so that the cutting amount of groove processing and the welding filling amount are increased, the welding efficiency is reduced, and the welding cost is increased; the welding gun directly adopts a small-angle groove, on one hand, a conventional automatic submerged arc welding gun cannot reach the root of the groove, the reduction degree of the groove is limited, on the other hand, the welding gun cannot well fuse parent metal on two sides of the groove due to size limitation, the defect of incomplete fusion is easily generated, and in addition, the material melting point of the conductive nozzle is low, so that the conductive nozzle is easily melted and dissolved into the welding line to cause the defect of crack generation in the welding line.

In order to solve the defects of conventional submerged arc automatic welding for welding thick-wall metal products, various new welding devices such as multi-wire submerged arc welding, cold wire submerged arc welding, narrow gap submerged arc welding and the like exist in the prior art, but the welding filling amount can not be reduced economically and effectively, and the following defects exist:

1. multi-wire submerged arc welding and cold wire submerged arc welding: the large molten pool volume, the large heat input and the large welding stress have certain negative effects on the toughness of a welding joint, a traditional large-area welding groove is still adopted, and the welding filling amount and various welding costs are greatly increased along with the increase of the thickness of a welding product.

2. Narrow gap submerged arc welding: at present, the solution method capable of effectively reducing the filling amount is narrow-gap submerged-arc welding, and the application universality of the narrow-gap submerged-arc welding is far less than that of the conventional submerged-arc welding.

The root cause of the method is as follows:

1) the technology requires that the cost of purchased equipment is too expensive, and the complete set of equipment is many millions of yuan;

2) compared comprehensively, the requirements of various preparation works before welding are too strict, the requirements on groove machining precision and the anti-moving requirement of a carrier roller are extremely high, and the preparation work cost before welding is improved, so that the overall economic and efficiency advantages are not outstanding when the thickness does not reach the extra thickness;

3) the single set of equipment only can weld a single welding line when occupying the operation, and in addition, the occupied area of the field is large, the equipment purchase cost is high, and the method is not beneficial to the adoption and popularization of construction enterprises producing mass products.

Disclosure of Invention

The utility model provides a conventional submerged arc automatic weld welder for welding of thick wall small-angle groove has solved the conventional submerged arc automatic weld welding thick wall metal product that provides in the above-mentioned background art and has existed inadequately, the unable economy, the effectual problem that reduces welding packing volume.

In order to realize the utility model aims at, the utility model adopts the following technical scheme:

the utility model provides a conventional submerged arc automatic weld welder for welding of thick wall low-angle groove, chews including barral of a gun, body of a gun and electrically conductive, the bottom of barral of a gun is connected with the body of a gun, just the electrically conductive mouth of chewing is installed to the bottom of the body of a gun, barral of a gun and body of a gun and electrically conductive mouth between be threaded connection.

Preferably, the barral of a gun includes electrically conductive barral of a gun main part, first attach fitting, second attach fitting and barral of a gun seal wire mouth, the upper end of barral of a gun main part is provided with the first attach fitting that is the external screw thread, just the bottom of barral of a gun main part is the second attach fitting, the inside of second attach fitting is provided with and is internal screw thread barral of a gun seal wire mouth.

Preferably, the body of a gun includes body of a gun main part, third attach fitting, fourth attach fitting and body of a gun guide wire mouth, the upper end of body of a gun main part is provided with the third attach fitting that is the external screw thread, just the bottom of body of a gun main part is fourth attach fitting, fourth attach fitting's inside is provided with and is internal screw thread body guide wire mouth, the body of a gun main part is connected with the second attach fitting of barral of a gun main part bottom through the third attach fitting.

Preferably, the third connection joint is matched with the thread of the second connection joint.

Preferably, the conductive nozzle comprises a conductive nozzle main body, a fifth connecting joint and a conductive nozzle wire guide port, the upper end of the conductive nozzle main body is provided with the fifth connecting joint which is an external thread, the conductive nozzle wire guide port is arranged in the fifth connecting joint, and the conductive nozzle main body is connected with the fourth connecting joint at the bottom end of the gun body main body through the fifth connecting joint.

Preferably, the fifth connection joint is matched with the thread of the fourth connection joint.

Preferably, the cross section of the gun body main body is of a rectangular structure, the direction of the short side of the rectangle is perpendicular to the direction of the groove, and the direction of the long side of the rectangle is parallel to the direction of the groove.

Preferably, the conductive nozzle is in a small-diameter long-round conical structure.

Due to the adoption of the technical scheme, the utility model discloses the creation possesses following beneficial effect:

1. the split type design of the conventional submerged arc automatic welding gun for welding the thick-wall small-angle groove improves the universality and maintainability of the gun body and the conductive nozzle, the universal purpose can be achieved only by matching gun rods with different interface forms and lengths on different welding machines, the local damage and the local maintenance can reduce the maintenance cost;

2. in practical production application, the problem of welding seam defect caused by easy melting of the conductive nozzle is solved, the service life of the conductive nozzle as a vulnerable part is prolonged, the maintenance frequency and the maintenance cost are reduced, and the conductive nozzle is easy to obtain materials, excellent in processing performance, low in price and free of great increase in cost;

3. although the welding gun is suitable for welding the thick-wall small-angle groove, the welding gun has wide compatibility with the thickness of a product, is suitable for a thin-wall product while welding a thick-wall product, and does not need to be repeatedly replaced after the welding gun is installed;

4. the utility model has no additional requirements on the welding materials and no class limitation on the welding materials in the aspect of application range, does not limit the application range of the original conventional submerged arc automatic welding to be narrowed, and does not increase the use constraint conditions of the original conventional submerged arc automatic welding;

5. when the welding gun of the utility model is actually used, the operation aspect of the welding gun has no obvious difference from the conventional submerged arc automatic welding gun, and has no special requirements on the operation skill of a welder, and the welding gun can be used after being installed and can be quickly adapted by the welder;

6. the welding gun has good continuous welding durability, and due to the innovative design of the gun body, the stable current carrying capacity is ensured, the overheating caused by long-time welding of the welding gun is avoided, the actual continuous welding process of a product is ensured not to generate overheating phenomenon, the using effect is stable, and the defect caused by the influence of the welding gun on a welding seam can be effectively ensured;

7. on the premise of ensuring the welding quality, the overall shape innovation design of the welding gun is suitable for small-angle groove welding, the cutting cost, the welding material cost, the welding labor cost and the occupation cost of various auxiliary devices are greatly reduced, the construction period is shortened, and the welding gun has reliable practicability, high universality and considerable economy and has popularization.

Drawings

Fig. 1 is the overall structure schematic diagram of the groove cross section direction of the utility model.

Fig. 2 is the overall structure schematic diagram of the groove length direction of the utility model.

Fig. 3 is a schematic view of the bow side structure of the present invention.

Fig. 4 is a schematic view of the bottom structure of the present invention.

Fig. 5 is a schematic view of the structure of the gun shaft on the bottom side of the present invention.

Fig. 6 is a schematic view of the bending side structure of the gun body of the present invention.

Fig. 7 is a schematic view of the structure of the gun body of the present invention.

Fig. 8 is a schematic view of the conductive nozzle of the present invention.

In the figure: 1. a gun rod; 101. a gun barrel body; 102. a first connection joint; 103. a second connection joint; 104. a lance rod guide port; 2. a gun body; 201. a body of the gun; 202. a third connection joint, 203, a fourth connection joint; 204. a gun body thread guide opening; 3. a conductive nozzle; 301. a conductive nozzle main body; 302. a fifth connection joint; 303. and a conductive nozzle and a conductive wire port.

Detailed Description

The technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

As shown in fig. 1-8, a conventional submerged arc automatic welding gun for welding a thick-wall small-angle groove comprises a gun rod 1, a gun body 2 and a conductive nozzle 3, wherein the welding gun is in split connection, the bottom end of the gun rod 1 is connected with the gun body 2, the conductive nozzle 3 is installed at the bottom end of the gun body 2, and the gun rod 1 and the gun body 2 are in threaded connection with the gun body 2 and the conductive nozzle 3.

The gun rod 1 is a connecting structure between a gun body 2 and the automatic submerged arc welding equipment, the structure of the gun rod is divided into two parts, the connecting structure comprises a connecting joint and a gun rod main body 101, the connecting joint is divided into a first connecting joint 102 and a second connecting joint 103 at two ends, the types of the connecting joints can be selected according to different welding equipment interfaces, and the connecting structure is suitable for connecting and fastening the gun body 2 and the conductive nozzle 3; the length of the part of the gun rod main body 101 can be selected according to the height requirements of different welding equipment and the wall thickness range of a welded thick-wall product, and the automatic submerged arc welding gun is suitable for conventional submerged arc automatic welding equipment with various machine body heights and the requirements of various wall thickness products.

The body of a gun 2 is the coupling part between 1 and the electrically conductive mouth 3 of rifle bar, and body of a gun main part 201 is chewed 3 with rifle bar 1, electrically conductive respectively through the third attach fitting 202 and the fourth attach fitting 203 at both ends and is connected, and it has the width of reasonable cross-sectional area and suitable thick wall small-angle groove, adapts to thick wall small-angle groove welding demand when guaranteeing the current-carrying capacity, the inside rifle bar wire guide mouth 104 that is provided with in end of rifle bar 1, the inside body of a gun wire guide mouth 204 that is provided with in end of body of a gun 2.

The conductive nozzle main body 301 of the conductive nozzle 3 is connected with the gun body 2 through a fifth connecting joint 302, the material of the conductive nozzle main body is higher in melting point and wear resistance, and a conductive nozzle wire guide port 303 is arranged inside the end of the conductive nozzle 3.

The cross section of a gun body 2 of the welding gun is of a rectangular structure, the direction of the short side of the rectangle is vertical to the direction of the groove, the direction of the long side of the rectangle is parallel to the direction of the groove, a conductive nozzle 3 of the welding gun is made of alloy materials, the melting point of the materials is high, and the materials are not easy to melt in the welding process; the wear resistance is good, the conductive nozzle 3 of the welding gun adopts a small-diameter long-circular-cone design, the size of the conductive nozzle can smoothly pass through the direction of a small-angle groove weld joint, and the conductive nozzle can reach the root of a groove in the vertical direction for welding.

During actual manufacture, the gun rod 1, the gun body 2 and the conductive nozzle 3 can be manufactured by machining, wherein the gun rod 1 and the gun body 2 are made of the same material, the conductive nozzle 3 is made of high-temperature-resistant and wear-resistant materials, the two materials are easy to purchase, and the cost is reasonable and economical without substantial cost increase.

When the welding gun is used, the welding gun can be normally used after being assembled to a corresponding conventional submerged arc automatic welding machine according to the operation rules of the corresponding welding machine, and the following operations are specifically carried out.

The welding gun is assembled:

this welder rifle bar 1 lectotype: and selecting the type of the gun rod 1 of the welding gun according to the type and the height of the corresponding conventional submerged arc automatic welding machine interface and the thickness range of the applicable welding product.

The welding gun is assembled into a whole in a split way: the gun rod 1 and the gun body 2 are fixed through the threaded connection joint, and the gun body 2 and the conductive nozzle 3 are fixed through the threaded connection joint, so that the gun rod 1, the gun body 2 and the conductive nozzle 3 are installed and combined into a whole.

Preparation before installation: before installing the welding gun, the equipment is ensured to be in a power-off state.

Disassembling an original welding gun: and (5) dismantling the original welding gun according to the corresponding operating rules.

The welding gun is assembled to a welding machine: according to corresponding operating rules, the end part of the gun rod 1 is assembled with a welding gun interface of the submerged arc automatic welding machine, and the long side direction of the rectangle of the welding gun body 2 is ensured to be parallel to the welding axis direction of the welding seam, so that the fixation is completed.

Welding: after the welding gun is assembled to a welding machine, welding construction can be carried out according to a conventional submerged automatic arc welding operation method.

The welding gun can be applied to all materials applicable to conventional submerged arc automatic welding equipment, such as carbon steel, low alloy steel, heat-resistant steel, low temperature steel, high alloy steel, nonferrous metal and the like, has no threshold condition for using a submerged arc welding wire, and has no constraint condition for the original welding operation range of the conventional submerged arc automatic welding machine.

Claims

1. The utility model provides a submerged arc automatic weld welder for welding of thick wall low-angle groove, includes barral of a gun (1), body of a gun (2) and electrically conductive chewing (3), its characterized in that: the bottom end of the gun rod (1) is connected with the gun body (2), the bottom end of the gun body (2) is provided with the conductive nozzle (3), and the gun rod (1) and the gun body (2) as well as the gun body (2) and the conductive nozzle (3) are in threaded connection;

the gun rod (1) comprises a conductive gun rod main body (101), a first connecting joint (102), a second connecting joint (103) and a gun rod wire guide port (104), wherein the first connecting joint (102) which is external threads is arranged at the upper end of the gun rod main body (101), the second connecting joint (103) is arranged at the bottom end of the gun rod main body (101), and the gun rod wire guide port (104) which is internal threads is arranged inside the second connecting joint (103);

the gun body (2) comprises a gun body main body (201), a third connecting joint (202), a fourth connecting joint (203) and a gun body thread guide opening (204), the upper end of the gun body main body (201) is provided with the third connecting joint (202) which is an external thread, the bottom end of the gun body main body (201) is provided with the fourth connecting joint (203), the inside of the fourth connecting joint (203) is provided with the gun body thread guide opening (204) which is an internal thread, and the gun body main body (201) is connected with the second connecting joint (103) at the bottom end of the gun rod main body (101) through the third connecting joint (202);

the conductive nozzle (3) comprises a conductive nozzle main body (301), a fifth connecting joint (302) and a conductive nozzle wire guide port (303), wherein the fifth connecting joint (302) which is an external thread is arranged at the upper end of the conductive nozzle main body (301), the conductive nozzle wire guide port (303) is arranged inside the fifth connecting joint (302), and the conductive nozzle main body (301) is connected with a fourth connecting joint (203) at the bottom end of the gun body main body (201) through the fifth connecting joint (302).

2. The submerged automatic arc welding gun for welding the thick-wall small-angle groove according to claim 1, characterized in that: the third connecting joint (202) is matched with the thread of the second connecting joint (103).

3. The submerged automatic arc welding gun for welding the thick-wall small-angle groove according to claim 1, characterized in that: the fifth connecting joint (302) is matched with the thread of the fourth connecting joint (203).

4. The submerged automatic arc welding gun for welding the thick-wall small-angle groove according to claim 1, characterized in that: the cross section of the gun body main body (201) is of a rectangular structure, the direction of the short side of the rectangle is perpendicular to the direction of a groove, and the direction of the long side of the rectangle is parallel to the direction of the groove.

5. The submerged automatic arc welding gun for welding the thick-wall small-angle groove according to claim 1, characterized in that: the conductive nozzle (3) is in a small-diameter long-circular cone structure.