Circumferential weld welding inner wall air cooling device

Abstract

The utility model discloses a circumferential weld welding inner wall air cooling device which comprises a pipe fitting and a straight pipe section connected with the pipe fitting, and an inner wall cooling assembly is arranged at the end, close to the pipe fitting, in the straight pipe section. The inner wall cooling assembly comprises a ventilation main base, a rear scissor support hinged to the ventilation main base, a movable support connected to the outer side of the ventilation main base in a sliding mode, a front scissor support hinged to the movable support, a nut connected to the end of the ventilation main base in a threaded mode, a spring arranged on the outer side of the ventilation main base in a sleeving mode and a rotary gas connecting piece. The gravity keeping nozzle is fixedly arranged on the outer side of the sealing end cover, and a through hole is formed in the ventilation main base. By means of the structure, internal rolling supporting is assisted in a cantilever mode, low-temperature gas at the cold end is sprayed to the inner wall of the pipe fitting through the vortex cold air gun by adopting compressed air, and the mode that the low-temperature gas flows rapidly and takes away heat input due to welding is combined, it can be guaranteed that the temperature between welding seam layers does not exceed the technological requirement, and the girth welding efficiency can be improved easily.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline factory prefabrication technical field, especially to ring weld welding inner wall air cooling device. BACKGROUND

[0002] The existing composite pipe butt joint ring weld welding, especially for stainless steel or nickel-based corrosion resistant material, the standard generally requires that the interlayer temperature is less than 150 DEG C, for small diameter pipe, especially the pipe with thick wall, after welding 3~4 layers, if there is no cooling measure, it needs to stop, and waits for the weld temperature to reduce to below 120 DEG C before starting welding, which seriously affects the welding efficiency. In order to reduce the downtime caused by the interlayer temperature of the weld being higher than the process requirement, therefore, the technical personnel in the art provide ring weld welding inner wall air cooling device to solve the problems raised in the above background technology. SUMMARY

[0003] The utility model discloses a ring weld welding inner wall air cooling device, through the setting of the inner wall cooling component in the cantilever mode, auxiliary internal rolling support, adopts compressed air through the eddy current cold air gun, and the low-temperature gas of cold end is sprayed to the inner wall of pipe fitting, combines the quick flow of low-temperature gas itself, and removes the heat input mode due to welding, can guarantee that the interlayer temperature of the weld does not exceed the process requirement, and is favorable for improving the ring seam welding efficiency.

[0004] In order to achieve the above object, provide ring weld welding inner wall air cooling device, including pipe fitting and with the straight pipe section of pipe fitting is connected, the inside and close to the one end of straight pipe section is provided with inner wall cooling component;

[0005] The inner wall cooling component includes a gas main base, a rear scissors support hinged to the gas main base, a movable support slidingly connected to the outer side of the gas main base, a front scissors support hinged to the movable support, a nut threadedly connected to the end of the gas main base, a spring sleeved on the outer side of the gas main base, a rotating gas connecting piece, a sealing end cover, and a gravity maintaining nozzle fixed to the outer side of the sealing end cover. The inner wall cooling component includes a gas main base, a rear scissors support hinged to the gas main base, a movable support slidingly connected to the outer side of the gas main base, a front scissors support hinged to the movable support, a nut threadedly connected to the end of the gas main base, a spring sleeved on the outer side of the gas main base, a rotating gas connecting piece, a sealing end cover, and a gravity maintaining nozzle fixed to the outer side of the sealing end cover. The inner wall cooling component includes a gas main base, a rear scissors support hinged to the gas main base, a movable support slidingly connected to the outer side of the gas main base, a front scissors support hinged to the movable support, a nut threadedly connected to the end of the gas main base, a spring sleeved on the outer side of the gas main base, a rotating gas connecting piece, a sealing end cover, and a gravity maintaining nozzle fixed to the outer side of the sealing end cover.

[0006] According to the ring weld welding inner wall air cooling device, the side opposite to the nut and the gas main base is fixed with a connecting nozzle communicated with the through hole, and the connecting nozzle is provided with a low-temperature cooling air pipe extending to the outer side of the straight pipe section.

[0007] According to the ring weld welding inner wall air cooling device, the outer side of the movable support is fixed with a pull wire extending to the outer side of the straight pipe section.

[0008] The outer side of the connecting nozzle is provided with anti-skid texture.

[0009] According to the ring-welding inner wall air cooling device, the low-temperature cooling air pipe is communicated with the low-temperature gas separated by the vortex cold air gun at the opposite end of the connecting nozzle.

[0010] The ring-welding inner wall air cooling device has the following beneficial effects:

[0011] 1. Compared with the prior art, the ring-welding inner wall air cooling device is provided with an inner wall cooling assembly in a cantilevered manner to assist internal rolling support, compressed air is used to pass through the vortex cold air gun to spray low-temperature gas at the cold end to the inner wall of the pipe, and the low-temperature gas is combined with its own rapid flow to remove the heat input due to welding, so that the temperature between the welding layers is guaranteed to be not higher than the process requirement, and the ring-welding efficiency is improved.

[0012] 2. Compared with the prior art, the ring-welding inner wall air cooling device has simple inner wall cooling assembly structure, convenient disassembly and assembly, and high practicability.

[0013] Additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0014] The present application will be further described below in combination with the drawings and embodiments.

[0015] Figure 1 It is a front view of the ring-welding inner wall air cooling device of the present application.

[0016] Figure 2 It is a first structure diagram of the inner wall cooling assembly of the ring-welding inner wall air cooling device of the present application.

[0017] Figure 3 It is a second structure diagram of the inner wall cooling assembly of the ring-welding inner wall air cooling device of the present application.

[0018] Figure 4 It is a front view structure diagram of the ring-welding inner wall air cooling device of the present application.

[0019] Figure 5 It is a Figure 4 sectional view structure diagram of the ring-welding inner wall air cooling device of the present application at A-A.

[0020] Figure 6 It is a Figure 4 sectional view structure diagram of the ring-welding inner wall air cooling device of the present application at C-C.

[0021] LEGEND:

[0022] 1, pipe; 2, straight pipe section; 3, rotating gas connecting piece; 4, main air passage base; 5, rear scissors support; 6, movable support; 7, front scissors support; 8, nut; 9, spring; 10, through hole; 11, sealing end cover; 12, gravity maintaining nozzle; 13, connecting nozzle; 14, low temperature cooling air pipe; 15, pull wire. DETAILED DESCRIPTION

[0023] This part will describe the specific embodiments of the present application in detail, the preferred embodiments of the present application are shown in the drawings, the role of the drawings is to supplement the description of the text part with graphics, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the present application, but it cannot be understood as a limitation on the protection scope of the present application.

[0024] Reference Figure 1 Figure 6 The ring weld welding inner wall air cooling device of the embodiment of the present application comprises a pipe 1 and a straight pipe section 2 connected with the pipe 1, an inner wall cooling assembly is arranged at one end of the straight pipe section 2 close to the pipe 1; the inner wall cooling assembly comprises a main air passage base 4, a rear scissors support 5 hinged with the main air passage base 4, a movable support 6 slidingly connected outside the main air passage base 4, a front scissors support 7 hinged with the movable support 6, a nut 8 threadedly connected at the end of the main air passage base 4, a spring 9 sleeved outside the main air passage base 4, a rotating gas connecting piece 3, a sealing end cover 11 and a gravity maintaining nozzle 12 fixed outside the sealing end cover 11, a through hole 10 is formed in the inside of the main air passage base 4, the rear scissors support 5 and the front scissors support 7 are hinged through the connecting hole in the middle, the spring 9 is located between the movable support 6 and the nut 8, the fixed end of the rotating gas connecting piece 3 is connected with the main air passage base 4, and the sealing end cover 11 is connected with the rotating end of the rotating gas connecting piece 3.

[0025] Specifically, the movable support 6 moves to the left under the action of the spring 9, so as to push the front scissors support 7 to move to the left, so that the end portions of the front scissors support 7 and the rear scissors support 5 are pressed on the inner wall of the pipe 1, and a firm support is formed. After the gravity maintaining nozzle 12 is connected with the main air passage base 4, it can be ensured that the nozzle of the gravity maintaining nozzle 12 always faces the inner wall close to the upper portion of the pipe 1, the distance is kept within the range of 30-50 mm, and the external cold end gas is diffused through the through hole 10, the rotating gas connecting piece 3 and the gravity maintaining nozzle 12, so as to effectively cool the range of 60 mm at each end of the weld, in combination with the rapid flow of the low temperature gas itself, the heat input mode caused by welding is carried away, so as to ensure that the temperature between the weld layers does not exceed the process requirement, so as to improve the efficiency of the ring weld.

[0026] ​The nut 8 is fixed with a connecting nozzle 13 on the side opposite to the aeration main base 4, and the connecting nozzle 13 is communicated with the through hole 10. A low-temperature cooling air pipe 14 is installed on the connecting nozzle 13 and extends to the outside of the straight pipe section 2. Specifically, the low-temperature cooling air pipe 14 is inserted on the connecting nozzle 13, so that the external cold-end gas can be sprayed to the inner wall of the pipe fitting 1 through the low-temperature cooling air pipe 14, the connecting nozzle 13, the aeration main base 4 and the gravity maintaining nozzle 12 in sequence and carried away by the heat input due to welding.

[0027] The outer part of the movable support 6 is fixed with a pull wire 15, and the pull wire 15 also extends to the outside of the straight pipe section 2. Specifically, the pull wire 15 is provided with a metal sleeve, and pulling the pull wire 15 can drive the movable support 6 to move to the right side and compress the spring 9, so that the front scissor support 7 and the rear scissor support 5 can be separated from the inner wall of the pipe fitting 1 and reduced, thereby facilitating the dismounting work of the inner wall cooling assembly.

[0028] The outer part of the connecting nozzle 13 is provided with anti-skid texture, so as to ensure the stability of the connection between the low-temperature cooling air pipe 14 and the connecting nozzle 13.

[0029] The end of the low-temperature cooling air pipe 14 opposite to the connecting nozzle 13 is communicated with low-temperature gas separated by a vortex cold air gun. Specifically, compressed air is used to pass through the vortex cold air gun, so that the low-temperature gas at the cold end is sprayed to the inner wall of the pipe fitting 1 after being communicated to the inside of the low-temperature cooling air pipe 14.

[0030] Working principle: the movable support 6 moves to the left side under the action of the spring 9, so as to drive the front scissor support 7 to move to the left side and make the end part of the front scissor support 7 and the rear scissor support 5 press tightly on the inner wall of the pipe fitting 1, thereby forming firm support. After the gravity maintaining nozzle 12 is connected with the aeration main base 4, it can be ensured that the nozzle of the gravity maintaining nozzle 12 always faces the inner wall of the upper part of the pipe fitting 1, and the distance is kept within the range of 30-50 mm. The external cold-end gas is diffused through the through hole 10, the rotating gas connecting piece 3 and the gravity maintaining nozzle 12, so as to effectively cool the range of 60 mm at each end of the weld seam. In combination with the rapid flow of the low-temperature gas, the heat input due to welding can be carried away, so as to ensure that the temperature between the weld seam layers does not exceed the process requirement.

[0031] The above embodiment of the utility model is described in detail in combination with the drawings, but the utility model is not limited to the above embodiment, and various changes can be made within the knowledge range possessed by the ordinary skilled in the art without departing from the purpose of the utility model.

Claims

1. A wind cooling device for a girth-welded inner wall, characterized by, The utility model provides a pipe fitting (1) and straight pipe section (2) are connected with pipe fitting (1), straight pipe section (2) inside and close to the one end of pipe fitting (1) is provided with inner wall cooling subassembly, The inner wall cooling subassembly includes a ventilation main base (4), a rear scissor support (5) hinged to the ventilation main base (4), a movable support (6) slidingly connected to the outside of the ventilation main base (4), a front scissor support (7) hinged to the movable support (6), a nut (8) threadedly connected to the end of the ventilation main base (4), a spring (9) sleeved to the outside of the ventilation main base (4), a rotating gas connecting piece (3), a sealing end cover (11), and a gravity retaining nozzle (12) fixed to the outside of the sealing end cover (11), the inside of the ventilation main base (4) is provided with a through hole (10), the rear scissor support (5) and the front scissor support (7) are hinged through the connecting hole in the middle, the spring (9) is located between the movable support (6) and the nut (8), the fixed end of the rotating gas connecting piece (3) is connected to the ventilation main base (4), and the rotating end of the rotating gas connecting piece (3) is connected to the sealing end cover (11).

2. The girth-welded seam welded inner wall air-cooling device according to claim 1, characterized in that, The side, opposite to the ventilation main base (4), of the nut (8) is fixedly provided with a connecting nozzle (13) communicated with the through hole (10), and the connecting nozzle (13) is inserted with a low-temperature cooling air pipe (14) extending to the outside of the straight pipe section (2).

3. The girth-welded seam welded inner wall air-cooling device according to claim 2, characterized in that, The outside of the movable support (6) is fixedly provided with a pull wire (15) extending to the outside of the straight pipe section (2).

4. The girth-welded seam welded inner wall air-cooling device according to claim 3, characterized in that, The outside of the connecting nozzle (13) is provided with an anti-skid texture.

5. The girth-welded seam welded inner wall air-cooling device according to claim 4, characterized in that, The opposite end of the low-temperature cooling air pipe (14) to the connecting nozzle (13) is communicated with low-temperature gas separated by a vortex cold air gun. The outside of the connecting nozzle (13) is provided with an anti-skid texture.

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