Welding flux conveying device for internal welding of spiral seam submerged arc welding steel pipe

Abstract

The utility model belongs to the technical field of welding devices, and particularly relates to a spiral seam submerged arc welding steel pipe inside welding flux conveying device which comprises a welding electrode fixing arm, a welding electrode is installed on the welding electrode fixing arm, the welding electrode is connected with the welding electrode fixing arm through a square pipe, and a sliding connector is arranged on the square pipe and connected with the square pipe in a sliding mode. The sliding connector is connected with a welding flux hopper through a feeding pipe, the welding flux hopper is movably connected with a welding electrode fixing arm, a welding flux conveying pipe is installed on the welding flux hopper, and the welding flux conveying pipe can rotate freely. The welding flux hopper and the welding flux conveying pipe can move, it is guaranteed that the welding flux can be accurately conveyed to a welding spot, long-time stopping for adjusting the welding flux conveying pipe is not needed, production efficiency is improved, and operation time is greatly saved.

Description

Technical Field

[0001] The utility model relates to a spiral seam submerged arc welding steel pipe internal welding flux conveying device, belonging to the technical field of welding devices. Background Art

[0002] Submerged arc welding is a commonly used welding method. During the welding process, flux needs to be continuously delivered to the welding position so that the arc burns under the flux layer. Submerged arc welding has the advantages of stable welding quality, high welding productivity, no arc light and less smoke. The existing spiral seam submerged arc welding steel pipe internal welding flux delivery device is made of a one-inch diameter galvanized pipe end bent and fixed on the welding electrode fixing arm. The tail is connected to a hose and an air duct is inserted to pass compressed air. The compressed air plays an auxiliary delivery role, and the main delivery power is still the weight of the flux.

[0003] The existing in-pipe welding flux conveying device has the following disadvantages:

[0004] 1. The device mainly relies on the weight of the flux to allow the flux to flow to the welding point. The compressed air introduced is not the main power, but only plays an auxiliary role. When the compressed air pressure is too high, the flux at the welding point will be blown away, and the arc will not be protected by the flux, causing an open arc; when the compressed air pressure is too low, the flux will be difficult to transport, and there will not be enough flux to bury the arc, causing an open arc. A pressure regulating valve is used on site to adjust the pressure of the compressed air. This adjustment method has a certain lag and requires repeated adjustments to achieve a good effect, which affects production efficiency. In addition, the installation of the air duct position is technically difficult and difficult to operate;

[0005] 2. During the production of small-diameter steel pipes, due to the limitation of the internal space of the steel pipe, the inclination angle of the flux delivery pipe is small, which makes it impossible for the flux to flow through the straight steel pipe to the welding point. The end of the delivery pipe needs to be bent at a certain angle, which increases the difficulty of flux delivery;

[0006] 3. During the welding process, the strip steel tends to deviate, causing the position of the steel plate joint to shift. However, the flux delivery pipe of the existing in-tube welding flux delivery device is fixed on the welding electrode fixing arm and cannot move with the steel plate joint. It will also cause the flux to fail to bury the arc and cause an open arc. After the car is stopped, the flux delivery pipe must be removed, the bending angle and installation position must be adjusted, and then reinstalled on the welding electrode fixing arm. This process takes a long time and greatly reduces production efficiency. Utility Model Content

[0007] In view of the above deficiencies in the prior art, the technical problem to be solved by the utility model is: to provide a device for conveying flux inside a spiral seam submerged arc welded steel pipe to ensure that the flux can be quickly and accurately conveyed to the welding point, avoid long-term parking to adjust the flux conveying pipe, improve production efficiency, and at the same time the flux is completely conveyed by gravity to reduce the difficulty of conveying.

[0008] The utility model discloses a spiral seam submerged arc welding steel pipe internal welding flux conveying device, comprising a welding electrode fixing arm, on which a welding electrode is mounted, the welding electrode and the welding electrode fixing arm are connected via a square tube, the square tube is provided with a sliding joint, the sliding joint is slidably connected to the square tube, the sliding joint is connected to a flux hopper via a feeding pipe, the flux hopper is movably connected to the welding electrode fixing arm, a flux conveying pipe is mounted on the flux hopper, and the flux conveying pipe can rotate freely.

[0009] The technical solution of the utility model is to provide a device for conveying flux inside a spiral seam submerged arc welded steel pipe. After the sliding joint receives the flux, it is conveyed to the flux hopper through a feeding pipe, and then conveyed to the welding point by a flux conveying pipe on the flux hopper. The utility model is provided with a movable flux conveying pipe and a flux hopper, so that the flux can be accurately conveyed to the welding point without stopping to adjust the flux conveying pipe, thereby improving production efficiency.

[0010] Preferably, the sliding joint comprises a sliding seat, on which a T-shaped tee is fixed, and the T-shaped tee is respectively connected to an external flux supply pipe, a compressed air interface and a feed pipe.

[0011] Preferably, the flux hopper is fixed on a telescopic tube, and the telescopic tube is passed through the interior of the square tube and movably connected to the square tube.

[0012] Furthermore, an upper material level sensor and a lower material level sensor are installed on one side of the flux hopper, a flux hopper cover is installed on the top of the flux hopper, and a screen and a breathable material are arranged in the middle of the flux hopper cover.

[0013] Furthermore, a universal joint is installed at the bottom of the flux hopper, and the flux hopper is connected to the flux delivery pipe through the universal joint.

[0014] The sliding seat is provided with a bearing for rolling and limiting, and one side of the sliding seat is also provided with a pipe clamp for fixing the T-shaped tee.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The flux hopper and flux delivery pipe of the utility model are connected to the same square pipe as the welding electrode. During the welding process, when the butt joint of the steel plates deviates, the operator controls the welding electrode to track the movement of the butt joint of the steel plates. Since the positions of the welding electrode and the flux delivery pipe are relatively fixed, the flux can always bury the arc and will not cause an open arc phenomenon.

[0017] 2. The flux hopper and the flux delivery pipe are both movable, and the flux arrival point can be adjusted at will to ensure that the flux can be accurately delivered to the welding point. There is no need to stop for a long time to adjust the flux delivery pipe, which improves production efficiency.

[0018] 3. When replacing the internal welding electrode, you only need to pull the flux hopper away from the welding electrode fixing arm, and push it back to the appropriate position and lock it after replacement. The presence of the sliding seat can ensure that the feeding pipe is not disconnected, which greatly saves operation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is one of the structural schematic diagrams of the utility model;

[0020] Figure 2 This is the second structural diagram of the utility model;

[0021] Figure 3 It is a top view of the utility model;

[0022] Figure 4 It is a schematic diagram of the working state of the utility model;

[0023] Figure 5 It is a structural schematic diagram of the sliding seat.

[0024] In the figure: 1. welding electrode fixing arm; 2. external flux supply pipe; 3. sliding seat; 4. welding electrode; 5. flux delivery pipe; 6. flux hopper; 7. feeding pipe; 8. T-type tee; 9. square pipe; 10. universal joint; 11. upper material level sensor; 12. lower material level sensor; 13. flux hopper cover; 14. telescopic tube; 15. steel pipe; 16. bearing; 17. pipe clamp. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with specific embodiments.

[0026] However, the description of the present invention is merely an embodiment of structural and even functional description, and the scope of rights of the present invention is not limited by the embodiments described in the text.

[0027] For example, multiple embodiments may have multiple changes and multiple forms, and it should be understood that the scope of rights of the present utility model includes equivalents that can realize the technical idea.

[0028] like Figure 1-5 As shown, this embodiment is implemented through the following technical solutions: it includes a welding electrode fixing arm 1, a welding electrode 4 is installed on the welding electrode fixing arm 1, the welding electrode 4 is connected to the welding electrode fixing arm 1 through a square tube 9, a sliding joint is provided on the square tube 9, the sliding joint is slidably connected to the square tube 9, the sliding joint is connected to the flux bucket 6 through a feeding pipe 7, the flux bucket 6 is movably connected to the welding electrode fixing arm 1, a flux delivery pipe 5 is installed on the flux bucket 6, and the flux delivery pipe 5 can rotate freely.

[0029] In this embodiment, the sliding joint includes a sliding seat 3, on which a T-shaped tee 8 is fixed, and the T-shaped tee 8 is respectively connected to the external flux supply pipe 2, the compressed air interface and the feeding pipe 7; the flux hopper 6 is fixed on the telescopic tube 14, and the telescopic tube 14 is inserted into the square tube 9 and movably connected to the square tube 9. An upper material level sensor 11 and a lower material level sensor 12 are installed on one side of the flux hopper 6, and a flux hopper cover 13 is installed on the top of the flux hopper 6. A screen and a breathable material are arranged in the middle of the flux hopper cover 13. The compressed air conveying the flux can escape from the breathable material of the flux hopper cover 13 to avoid the interference of the compressed air on the flux at the arc. The breathable material can only allow gas to pass through, and the flux particles cannot pass through, so as to achieve the effect of ventilation and ensure the sealing of the flux. A universal joint 10 is installed at the bottom of the flux hopper 6, and the flux hopper 6 is connected to the flux delivery pipe 5 through the universal joint 10. The sliding seat 3 is made of square steel, and bearings 16 are provided on the upper and lower sides inside and the left and right sides outside of the sliding seat 3. The bearings 16 are used for rolling and limiting. A pipe clamp 17 for fixing the T-shaped tee is also provided on one side of the sliding seat 3.

[0030] The working process of the utility model is:

[0031] When welding the steel pipe 15, the flux in the flux hopper 6 is transported to the welding point through the flux delivery pipe 5. When the flux in the flux hopper 6 is continuously consumed and is not enough to cover the lower material level sensor 12, the lower material level sensor 12 sends a signal to control the pneumatic solenoid valve to open, and compressed air is introduced from the compressed air interface of the T-type three-way 8 to continuously transport the flux supplied by the external flux supply pipe 2 into the flux hopper 6; because the externally supplied flux is greater than the flux consumed in the flux hopper 6, the flux level continues to rise. When the flux level in the flux hopper 6 covers the upper material level sensor 11, the upper material level sensor 11 sends a signal to control the pneumatic solenoid valve to close and stop feeding. This cycle is repeated to achieve continuous supply of flux.

[0032] Of course, the above contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of the embodiments of the present invention. The present invention is not limited to the above examples, and any equivalent changes and improvements made by ordinary technicians in the technical field within the essential scope of the present invention shall fall within the scope of the patent coverage of the present invention.

Claims

1. A spiral seam submerged arc welding steel pipe internal welding flux conveying device, comprising a welding electrode fixing arm (1), on which a welding electrode (4) is mounted, characterized in that: The welding electrode (4) is connected to the welding electrode fixing arm (1) via a square tube (9), a sliding joint is provided on the square tube (9), the sliding joint is slidably connected to the square tube (9), the sliding joint is connected to the flux hopper (6) via a feeding pipe (7), the flux hopper (6) is movably connected to the welding electrode fixing arm (1), a flux delivery pipe (5) is installed on the flux hopper (6), and the flux delivery pipe (5) can rotate freely.

2. The spiral seam submerged arc welding steel pipe internal welding flux conveying device according to claim 1 is characterized in that: The sliding joint comprises a sliding seat (3), on which a T-shaped tee (8) is fixed, and the T-shaped tee (8) is respectively connected to an external flux supply pipe (2), a compressed air interface and a feed pipe (7).

3. The spiral seam submerged arc welding steel pipe internal welding flux conveying device according to claim 2 is characterized in that: The sliding seat (3) is provided with a bearing (16) for rolling and limiting, and one side of the sliding seat (3) is also provided with a pipe clamp (17) for fixing the T-shaped tee.

4. The spiral seam submerged arc welding steel pipe internal welding flux conveying device according to claim 1 is characterized in that: The flux hopper (6) is fixed on a telescopic tube (14), and the telescopic tube (14) is passed through the interior of the square tube (9) and is movably connected to the square tube (9).

5. The device for conveying flux for internal welding of spiral submerged arc welded steel pipe according to claim 4, characterized in that: An upper material level sensor (11) and a lower material level sensor (12) are installed on one side of the flux hopper (6), a flux hopper cover (13) is installed on the top of the flux hopper (6), and a screen and a breathable material are arranged in the middle of the flux hopper cover (13).

6. The device for conveying flux for internal welding of spiral submerged arc welded steel pipe according to claim 4 or 5, characterized in that: A universal joint (10) is installed at the bottom of the flux hopper (6), and the flux hopper (6) is connected to the flux delivery pipe (5) via the universal joint (10).

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