Cooling device and method for marine stainless steel pipe welding

Abstract

The invention discloses a cooling device and method for marine stainless steel pipe welding, and particularly relates to the technical field of shipbuilding, the cooling device comprises a plurality of supporting bottom frames which are uniformly distributed, and supporting wheels are rotatably mounted on the two sides of the top end of each supporting bottom frame; two to-be-welded stainless steel pipelines are rotationally supported on the multiple supporting wheels, outer cooling mechanisms are arranged at the welding positions of the outer sides of the two stainless steel pipelines, and inner cooling mechanisms are arranged at the welding positions of the inner sides of the two stainless steel pipelines. The outer cooling mechanism comprises two side sealing pieces which are symmetrically distributed, and a transfer piece is arranged between the two side sealing pieces. According to the stainless steel pipeline rotating type welding device, by arranging the outer cooling mechanism, when a stainless steel pipeline is subjected to rotating type welding, gas cooling can be conducted on the outer side of a welded part after welding, and compared with natural cooling and air cooling, the cooling efficiency is improved; and the cooling efficiency of the stainless steel pipeline after welding is improved, the welding part is prevented from being polluted, and the purity of metal in a welding seam area is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shipbuilding, in particular to a cooling device and method for welding of marine stainless steel pipes. BACKGROUND

[0002] In the field of shipbuilding and ocean engineering, stainless steel pipes are widely used in the piping system of ships, including cooling water piping, fuel piping, ballast water system piping and other key components, due to their excellent corrosion resistance, high strength and good mechanical properties. In the assembly process of stainless steel pipes, welding is the core process to realize the connection of the piping system, and the welding quality directly determines the sealing performance and structural strength of the piping system of the ship. Marine stainless steel pipes need to be cooled during welding processing. Traditional cooling methods mostly use natural cooling or air cooling, that is, after the stainless steel pipe is welded, air cooling is performed using natural cooling or air cooling. This method mostly cools the outside of the pipe, and the cooling efficiency is relatively slow, which affects the overall welding efficiency of the marine stainless steel pipe. Therefore, we propose a cooling device and method for welding of marine stainless steel pipes to solve the above problems. SUMMARY

[0003] The purpose of the present application is to provide a cooling device and method for welding of marine stainless steel pipes to solve the problems raised in the background.

[0004] To achieve the above purpose, the present application provides the following technical scheme: a cooling device for welding of marine stainless steel pipes, comprising a support chassis, the support chassis is provided with a plurality of uniformly distributed, the top of the support chassis is rotatably installed with support wheels on both sides, a plurality of support wheels rotatably support two stainless steel pipes to be welded, the welding positions on the outer sides of the two stainless steel pipes are provided with an outer cooling mechanism, and the welding positions on the inner sides of the two stainless steel pipes are provided with an inner cooling mechanism. The outer cooling mechanism comprises two symmetrically distributed side seals, and a transfer member is arranged between the two side seals.

[0005] As a preferred technical scheme of the present application, the side seal comprises two symmetrically distributed half seal ring frames, the two half seal ring frames are combined to form a circular ring seal frame, a half seal rubber pad is movably clamped on the inner side of the half seal ring frame, the inner side of the half seal rubber pad is in contact with the outer wall of the corresponding stainless steel pipe, a first rotating seat and a second rotating seat are fixedly installed at the opposite ends of the two half seal ring frames, the second rotating seat is rotatably installed on the first rotating seat, a first fixing seat is integrally formed at the other end of the half seal ring frame, and the two first fixing seats are fixedly installed by bolts.

[0006] As a preferred technical scheme of the present application, the transfer member comprises an arc-shaped middle frame, both ends of the arc-shaped middle frame are provided with arc-shaped side frames, the arc-shaped middle frame and the two arc-shaped side frames combine to form a circular middle frame, a sealing clamp is integrally formed at the side end of the circular middle frame, the sealing clamp is respectively rotationally clamped in the corresponding circular ring frame, the side end of the sealing clamp is in contact with the inner wall of the circular ring frame, the arc-shaped middle frame is provided with a welding seat and a cooling seat, the welding seat is used for mounting a welding head of a welding machine, the cooling seat is used for mounting a cooling gas nozzle, a connecting head is fixedly arranged at one end of the arc-shaped side frame away from the arc-shaped middle frame at the top position, a first sealing plate is fixedly arranged at the inner wall of one end of the arc-shaped side frame close to the arc-shaped middle frame at the bottom position, a second sealing plate is fixedly arranged at the inner side of one end of the arc-shaped side frame away from the arc-shaped middle frame at the position of the connecting head, the end of the first sealing plate and the second sealing plate is in contact with the outer wall of the stainless steel pipeline, and a mounting bracket is fixedly mounted on the outer side of the arc-shaped middle frame.

[0007] As a preferred technical scheme of the present application, both ends of the arc-shaped middle frame are integrally formed with third rotating seats, one end of the arc-shaped side frame close to the arc-shaped middle frame is integrally formed with a fourth rotating seat, and the adjacent third rotating seat and fourth rotating seat are rotationally mounted, one end of the arc-shaped side frame away from the arc-shaped middle frame is integrally formed with a second fixing seat, and the two second fixing seats are fixedly mounted through bolts.

[0008] As a preferred technical scheme of the present application, the internal cooling mechanism comprises two inner side frames symmetrically distributed, the middle part of the inner side frame is fixedly provided with a bearing, the middle part of the bearing is fixedly provided with a flow guide middle cylinder, the upper part of the flow guide middle cylinder is provided with a cooling nozzle, the top of the cooling nozzle is provided with a nozzle groove, the bottom of the cooling nozzle is integrally formed with a first pipe, the top of the flow guide middle cylinder is fixedly provided with a second pipe corresponding to the first pipe, the top end of the second pipe is fixedly mounted with the bottom end of the corresponding first pipe, the lower part of the flow guide middle cylinder is provided with a suction bottom frame, the bottom end of the suction bottom frame is fixedly provided with a scraping strip, the scraping strip is in contact with the inner wall of the stainless steel pipeline, both sides of the bottom of the suction bottom frame are provided with suction grooves, the top end of the suction bottom frame is fixedly provided with a third pipe, the flow guide middle cylinder is provided with a suction middle pipe, the bottom of the suction middle pipe is fixedly provided with a fourth pipe corresponding to the third pipe, the fourth pipe is fixedly clamped at the bottom of the flow guide middle cylinder, and the bottom end of the fourth pipe is fixedly mounted with the top end of the corresponding third pipe.

[0009] As a preferred technical scheme of the present application, the outer side of the inner side frame is fixedly provided with a connecting strut through bolts, the connecting strut is provided with a plurality of annular array distribution, one end of the connecting strut away from the inner side frame is rotationally mounted with a moving wheel, and the moving wheel is in contact with the inner wall of the stainless steel pipeline.

[0010] As a preferred technical scheme of the present application, the end of one of the connecting struts is fixedly installed with a first motor, and the driving end of the first motor is fixedly installed with a corresponding moving wheel.

[0011] As a preferred technical scheme of the present application, the end of one of the connecting struts is fixedly installed with a first motor, and the driving end of the first motor is fixedly installed with a corresponding moving wheel.

[0012] As a preferred technical scheme of the present application, the end of one of the connecting struts is fixedly installed with a first motor, and the driving end of the first motor is fixedly installed with a corresponding moving wheel.

[0013] A method for using a cooling device for welding stainless steel pipes for ships, comprising the following steps: Step one, place two stainless steel pipes to be welded on the supporting wheels and roll, then select the appropriate length of the connecting strut according to the outer diameter of the stainless steel pipe, so that the moving wheel and the inner wall of the stainless steel pipe are in contact, start the first motor to drive the corresponding moving wheel to rotate, thereby driving the internal cooling mechanism to move inside the stainless steel pipe, and the cooling nozzle moves to the welding position of the stainless steel pipe, at this time, the scraper and the inner wall of the stainless steel pipe are in contact; And connect the end of the outer connecting pipe with the output port of the cooling liquid output system, and connect the outer end of the inner connecting pipe with the suction port of the waste liquid recovery system; Step two, fix the transfer member on the external support through the mounting bracket, rotate the two arc-shaped side frames, and fix the two second fixed seats by bolts, the arc-shaped middle frame and the two arc-shaped side frames are combined to form a circular frame, and the center of the circular frame corresponds to the axis of the stainless steel pipe. Then, install two side sealing members on the outer sides of the two stainless steel pipes, before installation, select the appropriate diameter of the half-sealing rubber pad according to the outer diameter of the stainless steel pipe, rotate the two half-sealing ring frames to close and combine to form a circular ring sealing frame, and fix the two first fixed seats by bolts, at this time, the inner side of the half-sealing rubber pad is in contact with the outer wall of the corresponding stainless steel pipe, the sealing clamps are rotatably clamped in the corresponding circular ring sealing frame, the side end of the sealing clamp is in contact with the inner wall of the circular ring sealing frame, and the two side circular ring sealing frames and the circular middle frame continuously seal and protect the welding position of the stainless steel pipe. Subsequently, the welding head of the welding machine is installed on the welding seat, the end of the welding head extends into the circular middle frame, the nozzle of the cooling gas output system is installed on the cooling seat, the end of the nozzle extends into the circular middle frame, and the end of the connecting head is connected with the recovery end of the waste gas recovery system; Step three, control the stainless steel pipeline to rotate, use the welding head to rotate the welding position of the stainless steel pipeline, and rotate the two arc-shaped side frames on the arc-shaped middle frame; At the same time, the cooling gas output system is started, the cooling gas is sprayed into the circular middle frame between the first sealing plate and the second sealing plate through the nozzle, the outside of the welded welding position is gas-cooled, and the waste gas recovery system is started, and the waste gas generated after cooling is sucked and recovered through the connecting head; The cooling liquid output system and the waste liquid recovery system are started at the same time, the cooling liquid is introduced into the cooling spray cylinder through the outer connecting pipe, the flow guide middle cylinder, the second pipe and the first pipe, and is sprayed out through a plurality of spray grooves, and is sprayed on the welding position on the inside of the stainless steel pipeline for inside water cooling, the waste water after cooling flows to the inside of the stainless steel pipeline, is sucked into the suction bottom frame through the suction groove, and is discharged in time through the third pipe, the fourth pipe, the suction middle pipe and the inner connecting pipe; During the period, the second motor is started to drive the transmission gear to drive the transmission gear ring and the flow guide middle cylinder to rotate, the rotation directions of the flow guide middle cylinder and the stainless steel pipeline are opposite, and the suction bottom frame and the scraping strip are always located at the bottom position.

[0014] Compared with the prior art, the beneficial effects of the present application are as follows: 1. By arranging the outer cooling mechanism, the stainless steel pipeline can be gas-cooled on the outside of the welded welding position during rotating welding, compared with natural cooling and air cooling, the cooling efficiency of the stainless steel pipeline after welding is improved, and the welded position is prevented from being polluted, and the purity of the welded joint area metal is ensured.

[0015] 2. By arranging the inner cooling mechanism, the cooling liquid can be sprayed on the welding position on the inside of the stainless steel pipeline for inside water cooling at the same time of welding, the cooling efficiency of the welding position of the stainless steel pipeline is further improved, and the waste water after cooling is sucked and discharged in time.

[0016] 3. By arranging the outer cooling mechanism, the waste gas recovery system is started at the same time of cooling, the waste gas generated after cooling is sucked and recovered through the connecting head, and the working environment is prevented from being polluted by the waste gas. DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating any creative labor.

[0018] Figure 1 This is a schematic diagram of the structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the structural connection between the stainless steel pipe and the external cooling mechanism in this invention.

[0020] Figure 3 This is a schematic diagram of the structural connection between the stainless steel pipe and the internal cooling mechanism in this invention.

[0021] Figure 4 This is a schematic diagram of the external cooling mechanism in this invention.

[0022] Figure 5 This is a schematic diagram showing the structural connection between the arc-shaped middle frame and the arc-shaped side frame in this invention.

[0023] Figure 6 This is a schematic diagram of the structure of the first sealing plate and the second sealing plate in this invention.

[0024] Figure 7 This is a schematic diagram of the internal cooling mechanism in this invention.

[0025] Figure 8 This is a schematic diagram of the partial structural connection of the internal cooling mechanism in this invention.

[0026] Figure 9 For the present invention Figure 8 Enlarged view of point A in the middle.

[0027] Figure 10 For the present invention Figure 8 Enlarged view of point B in the middle.

[0028] In the diagram: 1. Support base frame; 11. Support wheel; 2. Stainless steel pipe; 3. External cooling mechanism; 4. Internal cooling mechanism; 31. Side seal; 32. Transfer component; 33. Welding seat; 34. Cooling seat; 35. Connector; 36. First sealing plate; 37. Second sealing plate; 38. Mounting bracket; 311. Semi-sealing ring frame; 312. Semi-sealing rubber pad; 313. First rotating seat; 314. Second rotating seat; 315. First fixed seat; 321. Arc-shaped middle frame; 322. Arc-shaped side frame; 323. Third rotating seat; 324. Fourth rotating seat; 325. Second Fixed base; 326, sealing clip; 41, inner frame; 411, bearing; 42, connecting support rod; 421, moving wheel; 422, first motor; 43, guide cylinder; 431, second pipe; 432, connecting clip; 44, cooling spray nozzle; 441, spray groove; 442, first pipe; 45, suction bottom frame; 451, suction groove; 452, third pipe; 46, scraper; 47, suction middle pipe; 471, fourth pipe; 48, outer connecting pipe; 481, inner connecting pipe; 49, transmission gear ring; 491, transmission gear; 492, second motor. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example: Figures 1-10 As shown, the present invention provides a cooling device for welding marine stainless steel pipes, including a support base 1. The support base 1 is provided with a plurality of evenly distributed support wheels 11 rotatably mounted on both sides of the top of the support base 1. Two stainless steel pipes 2 to be welded are rotatably supported on the plurality of support wheels 11, so as to facilitate the stainless steel pipes 2 to roll on the plurality of support wheels 11, thereby facilitating the rotational welding of the welding parts of the two stainless steel pipes 2. An external cooling mechanism 3 is provided at the welding parts on the outer side of the two stainless steel pipes 2, and an internal cooling mechanism 4 is provided at the welding parts on the inner side of the two stainless steel pipes 2. The external cooling mechanism 3 includes two symmetrically distributed side seals 31, with a transfer member 32 between the two side seals 31; The side sealing component 31 includes two symmetrically distributed semi-sealing ring frames 311. The opposite ends of the two semi-sealing ring frames 311 are respectively fixedly installed with a first rotating seat 313 and a second rotating seat 314. The second rotating seat 314 is rotatably installed on the first rotating seat 313. The other end of each semi-sealing ring frame 311 is integrally formed with a first fixed seat 315. The two first fixed seats 315 are fixedly installed by bolts. The two semi-sealing ring frames 311 are easy to rotate open and close. The two semi-sealing ring frames 311 are combined to form a circular sealing frame. The inner side of each semi-sealing ring frame 311 is movably fitted with a semi-sealing rubber pad 312. The inner side of the semi-sealing rubber pad 312 contacts the outer wall of the corresponding stainless steel pipe 2. In use, the appropriate diameter of the semi-sealing rubber pad 312 is selected and installed according to the outer diameter of the stainless steel pipe 2. The transfer component 32 includes an arc-shaped middle frame 321. A mounting bracket 38 is fixedly installed on the outer side of the arc-shaped middle frame 321, and the transfer component 32 is fixed to the outer bracket through the mounting bracket 38. Arc-shaped side frames 322 are provided at both ends of the arc-shaped middle frame 321. A third rotating seat 323 is integrally formed at both ends of the arc-shaped middle frame 321. A fourth rotating seat 324 is integrally formed at the end of the arc-shaped side frame 322 closest to the arc-shaped middle frame 321. Adjacent third rotating seats 323 and fourth rotating seats 324 are rotatably installed. A second fixing seat 325 is integrally formed at the end of the arc-shaped side frame 322 away from the arc-shaped middle frame 321. The two second fixing seats 325 are fixedly installed by bolts. The two arc-shaped side frames 322 can rotate on the arc-shaped middle frame 321. The arc-shaped middle frame 321 and the two arc-shaped side frames 322 are combined to form a circular middle frame. The side end of the circular middle frame is integrally formed with a sealing card 326, which is respectively rotatably clamped in the corresponding annular sealing frame, and the side end of the sealing card 326 is in contact with the inner wall of the annular sealing frame. The two annular sealing frames facilitate sealing rotation on the outside of the circular middle frame without affecting the rolling of the stainless steel pipeline 2, and continuously seal and protect the welding part of the stainless steel pipeline 2. The arc-shaped middle frame 321 is fixedly provided with a welding seat 33 and a cooling seat 34. The welding seat 33 is used to install the welding head of the welding machine. The welding head of the welding machine is installed on the welding seat 33, and the end of the welding head extends into the circular middle frame. The welding head of the welding machine rotates to weld the welding part of the stainless steel pipeline 2. The cooling seat 34 is used to install the cooling gas nozzle of the cooling gas output system. The nozzle of the cooling gas output system is installed on the cooling seat 34, and the end of the nozzle extends into the circular middle frame. During welding, the cooling gas output system is turned on, and the cooling gas is sprayed into the circular middle frame through the nozzle to cool the outside of the welded part. Compared with natural cooling and air cooling, the cooling efficiency of the welded part of the stainless steel pipeline 2 is improved, and the welded part is prevented from being contaminated to ensure the purity of the welded area. The end of the top position arc-shaped side frame 322 away from the arc-shaped middle frame 321 is fixedly provided with a connecting head 35. The end of the connecting head 35 is connected with the recovery end of the waste gas recovery system. While cooling, the waste gas recovery system is turned on, and the waste gas generated after cooling is sucked and recovered through the connecting head 35 to prevent the working environment from being polluted by waste gas. The inner wall of the end of the bottom position arc-shaped side frame 322 close to the arc-shaped middle frame 321 is fixedly provided with a first sealing plate 36, and the inner side of the end of the arc-shaped side frame 322 away from the arc-shaped middle frame 321 at the position of the connecting head 35 is fixedly provided with a second sealing plate 37. The ends of the first sealing plate 36 and the second sealing plate 37 are in contact with the outer wall of the stainless steel pipeline 2. The first sealing plate 36 and the second sealing plate 37 form a closed area between the cooling seat 34 and the connecting head 35. The cooling gas sprayed in the closed area cools the welding area between the first sealing plate 36 and the second sealing plate 37, improving the cooling efficiency of the cooling gas.

[0031] The inner cooling mechanism 4 includes two inner side frames 41 symmetrically distributed. The outer side of the inner side frame 41 is fixedly provided with a connecting strut 42 through a bolt. The connecting strut 42 is arranged in an annular array. The end of the connecting strut 42 away from the inner side frame 41 is rotatably provided with a moving wheel 421. The moving wheel 421 is in contact with the inner wall of the stainless steel pipeline 2. During use, the appropriate length of the connecting strut 42 is selected according to the outer diameter of the stainless steel pipeline 2 to make the moving wheel 421 in contact with the inner wall of the stainless steel pipeline 2. One end of the connecting strut 42 is fixedly installed with a first motor 422, the driving end of the first motor 422 is fixedly installed with the shaft end of a corresponding moving wheel 421, by starting the first motor 422 to drive the corresponding moving wheel 421 to rotate, thereby driving the internal cooling mechanism 4 to move inside the stainless steel pipeline 2.

[0032] The middle part of the inner frame 41 is fixedly provided with a bearing 411, the middle part of the bearing 411 is fixedly provided with a flow guide middle cylinder 43, the upper part of the flow guide middle cylinder 43 is provided with a cooling spray cylinder 44, the top of the cooling spray cylinder 44 is provided with a spray groove 441, the bottom of the cooling spray cylinder 44 is integrally formed with a first pipe 442, the top end of the flow guide middle cylinder 43 is fixedly installed with a second pipe 431 corresponding to the first pipe 442, the top end of the second pipe 431 is fixedly installed with the bottom end of the first pipe 442 corresponding, the lower part of the flow guide middle cylinder 43 is provided with a suction bottom frame 45, the bottom end of the suction bottom frame 45 is fixedly installed with a scraping strip 46, the scraping strip 46 is in contact with the inner wall of the stainless steel pipeline 2, the bottom of the suction bottom frame 45 is provided with a suction groove 451 on both sides, the scraping strip 46 scrapes and cleans the inner wall of the rotating stainless steel pipeline 2, so that the waste liquid is effectively sucked into the suction bottom frame 45 through the suction groove 451; The top end of the suction bottom frame 45 is fixedly installed with a third pipe 452, the flow guide middle cylinder 43 is provided with a suction middle pipe 47, the bottom of the suction middle pipe 47 is fixedly installed with a fourth pipe 471 corresponding to the third pipe 452, the fourth pipe 471 is fixedly connected to the bottom of the flow guide middle cylinder 43, the bottom end of the fourth pipe 471 is fixedly installed with the top end of the third pipe 452 corresponding; The end of the flow guide middle cylinder 43 is fixedly installed with a connecting clamp head 432, the middle part of the connecting clamp head 432 is fixedly installed with an outer connecting pipe 48, the outer connecting pipe 48 is fixedly provided with an inner connecting pipe 481, the inner end of the inner connecting pipe 481 is fixedly installed with the end of the suction middle pipe 47, the end of the outer connecting pipe 48 is connected with the output port of the cooling liquid output system, and the outer end of the inner connecting pipe 481 is connected with the suction port of the waste liquid recovery system, when welding, the cooling liquid output system and the waste liquid recovery system are started at the same time, the cooling liquid is introduced into the cooling spray cylinder 44 through the outer connecting pipe 48, the flow guide middle cylinder 43, the second pipe 431 and the first pipe 442, and is sprayed through the plurality of spray grooves 441, and is sprayed on the welding position inside the stainless steel pipeline 2 for internal water cooling, thereby further improving the cooling efficiency of the welding position of the stainless steel pipeline 2, the cooled waste water flows to the inside of the stainless steel pipeline 2, is sucked into the suction bottom frame 45 through the suction groove 451, and is discharged in time through the third pipe 452, the fourth pipe 471, the suction middle pipe 47 and the inner connecting pipe 481.

[0033] The transmission gear ring 49 is fixedly installed at the end of the guide middle cylinder 43 away from the connecting joint 432, the bottom of the transmission gear ring 49 is connected with the transmission gear 491 in meshing, the transmission gear 491 is rotatably installed on the corresponding inner side frame 41, the inner side frame 41 is fixedly installed with the second motor 492 at the side close to the transmission gear 491, the driving end of the second motor 492 and the shaft end of the transmission gear 491 are fixedly installed, when the stainless steel pipe 2 is rotatably welded, the second motor 492 is started to drive the transmission gear 491 to drive the transmission gear ring 49 and the guide middle cylinder 43 to rotate, the rotating directions of the guide middle cylinder 43 and the stainless steel pipe 2 are opposite, so that the suction bottom frame 45 and the scraping strip 46 are always at the bottom position.

[0034] A method for using the cooling device for welding stainless steel pipes for ships, comprising the following steps: Step one, place two stainless steel pipes 2 to be welded on the plurality of supporting wheels 11 to roll, then select the connecting support rod 42 with appropriate length according to the outer diameter of the stainless steel pipe 2, make the moving wheel 421 contact with the inner wall of the stainless steel pipe 2, start the first motor 422 to drive the corresponding moving wheel 421 to rotate, thereby driving the inner cooling mechanism 4 to move in the inner side of the stainless steel pipe 2, making the cooling spray cylinder 44 move to the welding position of the stainless steel pipe 2, at this time, the scraping strip 46 contacts with the inner wall of the stainless steel pipe 2; And connect the end of the outer connecting pipe 48 with the output port of the cooling liquid output system, and connect the outer end of the inner connecting pipe 481 with the suction port of the waste liquid recovery system; Step two, fix the transfer member 32 on the external support through the installation support 38, rotate the two arc-shaped side frames 322, and fixedly install the two second fixed seats 325 through bolts, the arc-shaped middle frame 321 and the two arc-shaped side frames 322 are combined to form a circular middle frame, the center of the circular middle frame corresponds to the axis position of the stainless steel pipe 2; Then, install the two side sealing members 31 on the outer sides of the two stainless steel pipes 2 respectively, before installation, select the semi-sealing rubber pad 312 with appropriate diameter according to the outer diameter of the stainless steel pipe 2, rotate the two semi-sealing ring frames 311 to be combined to form a circular ring sealing frame, fixedly install the two first fixed seats 315 through bolts, at this time, the inner side of the semi-sealing rubber pad 312 contacts with the outer wall of the corresponding stainless steel pipe 2, the sealing clamps 326 are respectively rotatably clamped in the corresponding circular ring sealing frame, the side end of the sealing clamp 326 contacts with the inner wall of the circular ring sealing frame, the two side circular ring sealing frames and the circular middle frame continuously seal and protect the welding position of the stainless steel pipe 2; Then, install the welding head of the welding machine on the welding seat 33, the end of the welding head extends into the circular middle frame, install the nozzle of the cooling gas output system on the cooling seat 34, the end of the nozzle extends into the circular middle frame, and connect the end of the connecting head 35 with the recovery end of the waste gas recovery system; Step three, control the stainless steel pipe 2 to rotate, use the welding head to rotate the welding position of the stainless steel pipe 2, and rotate the two arc-shaped side frames 322 on the arc-shaped middle frame 321; At the same time, the cooling gas output system is opened, the cooling gas is sprayed into the circular middle frame between the first sealing plate 36 and the second sealing plate 37 through the spray head, the outside of the welded welding position is gas cooled, and the waste gas recovery system is opened, the waste gas generated after cooling is sucked and recovered through the connecting head 35; The cooling liquid output system and the waste liquid recovery system are opened at the same time, the cooling liquid is introduced into the cooling spray cylinder 44 through the outer connecting pipe 48, the flow guide middle cylinder 43, the second pipe 431 and the first pipe 442, and sprayed out through the plurality of spray grooves 441, and sprayed on the inside of the stainless steel pipe 2 to cool the inside of the stainless steel pipe 2, the waste water after cooling flows to the inside of the stainless steel pipe 2, is sucked into the suction bottom frame 45 through the suction groove 451, and is discharged in time through the third pipe 452, the fourth pipe 471, the suction middle pipe 47 and the inner connecting pipe 481; During the period, the second motor 492 is opened to drive the transmission gear 491 to drive the transmission gear ring 49 and the flow guide middle cylinder 43 to rotate, the flow guide middle cylinder 43 and the stainless steel pipe 2 rotate in opposite directions, so that the suction bottom frame 45 and the scraping strip 46 are always in the bottom position.

[0035] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A cooling device for welding of stainless steel pipes for marine use, comprising a support chassis (1), characterised in that: The support chassis (1) is provided with a plurality of uniformly distributed support wheels (11) rotatably installed on both sides of the top end of the support chassis (1), two stainless steel pipes (2) to be welded are rotatably supported on the support wheels (11), an outer cooling mechanism (3) is arranged at the welding position of the outer side of the two stainless steel pipes (2), and an inner cooling mechanism (4) is arranged at the welding position of the inner side of the two stainless steel pipes (2). The outer cooling mechanism (3) comprises two side sealing pieces (31) symmetrically distributed.

2. A cooling device for welding of stainless steel pipes for marine use according to claim 1, characterized in that: The side sealing piece (31) comprises two half sealing ring frames (311) symmetrically distributed, the two half sealing ring frames (311) are combined into a ring sealing frame, a half sealing rubber pad (312) is movably clamped on the inner side of the half sealing ring frame (311), the inner side of the half sealing rubber pad (312) is in contact with the outer wall of the corresponding stainless steel pipe (2), a first rotating seat (313) and a second rotating seat (314) are fixedly installed at the opposite ends of the two half sealing ring frames (311) respectively, the second rotating seat (314) is rotatably installed on the first rotating seat (313), a first fixing seat (315) is integrally formed at the other end of the half sealing ring frame (311), and the two first fixing seats (315) are fixedly installed through bolts.

3. A cooling device for welding of stainless steel pipes for marine use according to claim 2, characterized in that: The middle transfer piece (32) comprises an arc-shaped middle frame (321), arc-shaped side frames (322) are arranged at both ends of the arc-shaped middle frame (321), the arc-shaped middle frame (321) and the two arc-shaped side frames (322) are combined into a circular middle frame, a sealing clamp (326) is integrally formed at the side end of the circular middle frame, the sealing clamp (326) is rotatably clamped in the corresponding ring sealing frame, the side end of the sealing clamp (326) is in contact with the inner wall of the ring sealing frame, a welding seat (33) and a cooling seat (34) are fixedly clamped on the arc-shaped middle frame (321), the welding seat (33) is used for installing a welding head of a welding machine, the cooling seat (34) is used for installing a cooling gas nozzle, a connecting head (35) is fixedly clamped at the end of the arc-shaped side frame (322) away from the arc-shaped middle frame (321) at the top position, a first sealing plate (36) is fixedly clamped on the inner wall of the end of the arc-shaped side frame (322) close to the arc-shaped middle frame (321) at the bottom position, a second sealing plate (37) is fixedly clamped on the inner side of the end of the arc-shaped side frame (322) away from the arc-shaped middle frame (321) at the position of the connecting head (35), the end portions of the first sealing plate (36) and the second sealing plate (37) are in contact with the outer wall of the stainless steel pipe (2), and a mounting bracket (38) is fixedly installed on the outer side of the arc-shaped middle frame (321).

4. A cooling device for welding of stainless steel pipes for marine use according to claim 3, characterized in that: Both ends of the arc-shaped middle frame (321) are integrally formed with third rotating seats (323), one end of the arc-shaped side frame (322) close to the arc-shaped middle frame (321) is integrally formed with a fourth rotating seat (324), and the adjacent third rotating seat (323) and fourth rotating seat (324) are rotatably installed, and one end of the arc-shaped side frame (322) away from the arc-shaped middle frame (321) is integrally formed with a second fixed seat (325), and the two second fixed seats (325) are fixedly installed by bolts.

5. A cooling device for welding of stainless steel pipes for marine use according to claim 4, characterized in that: The inner cooling mechanism (4) comprises two inner side frames (41) symmetrically distributed, the middle part of the inner side frame (41) is fixedly provided with a bearing (411), the middle part of the bearing (411) is fixedly provided with a flow guide middle cylinder (43), the upper part of the flow guide middle cylinder (43) is provided with a cooling spray cylinder (44), the top of the cooling spray cylinder (44) is provided with a spray groove (441), the bottom of the cooling spray cylinder (44) is integrally formed with a first pipe (442), the top of the flow guide middle cylinder (43) is fixedly provided with a second pipe (431) corresponding to the first pipe (442), the top end of the second pipe (431) and the bottom end of the corresponding first pipe (442) are fixedly installed, the lower part of the flow guide middle cylinder (43) is provided with a suction bottom frame (45), the bottom end of the suction bottom frame (45) is fixedly provided with a scraping strip (46), the scraping strip (46) is in contact with the inner wall of the stainless steel pipe (2), both sides of the bottom of the suction bottom frame (45) are provided with suction grooves (451), the top end of the suction bottom frame (45) is fixedly provided with a third pipe (452), the flow guide middle cylinder (43) is provided with a suction middle pipe (47), the bottom of the suction middle pipe (47) is fixedly provided with a fourth pipe (471) corresponding to the third pipe (452), the fourth pipe (471) is fixedly connected to the bottom of the flow guide middle cylinder (43), and the bottom end of the fourth pipe (471) and the top end of the corresponding third pipe (452) are fixedly installed.

6. A cooling device for welding of stainless steel pipes for marine use according to claim 5, characterized in that: The outer side of the inner side frame (41) is fixedly provided with a connecting strut (42) through a bolt, the connecting strut (42) is provided with a plurality of annular array distribution, one end of the connecting strut (42) away from the inner side frame (41) is rotatably provided with a moving wheel (421), and the moving wheel (421) is in contact with the inner wall of the stainless steel pipe (2).

7. A cooling device for welding of stainless steel pipes for marine use according to claim 6, characterized in that: The end of one of the connecting struts (42) is fixedly provided with a first motor (422), and the driving end of the first motor (422) and the shaft end of the corresponding moving wheel (421) are fixedly installed.

8. A cooling device for welding of stainless steel pipes for marine use according to claim 7, characterized in that: The end of the flow guide middle cylinder (43) is fixedly provided with a connecting clamp head (432), the middle part of the connecting clamp head (432) is fixedly provided with an outer connecting pipe (48), the outer connecting pipe (48) is fixedly provided with an inner connecting pipe (481), and the inner end of the inner connecting pipe (481) and the end of the suction middle pipe (47) are fixedly installed.

9. A cooling device for welding of stainless steel pipes for marine use according to claim 8, characterized in that: The drive middle cylinder (43) is fixedly installed with a transmission gear ring (49) at one end away from the connecting clamp (432), the bottom of the transmission gear ring (49) is movably connected with a transmission gear (491), the transmission gear (491) is rotatably installed on the corresponding inner frame (41), the inner frame (41) is fixedly installed with a second motor (492) on the side close to the transmission gear (491), and the driving end of the second motor (492) and the shaft end of the transmission gear (491) are fixedly installed.

10. A method of using the cooling device for welding of stainless steel pipes for marine use according to claim 9, characterized in that, It comprises the following steps: Step one, place two stainless steel pipes (2) to be welded on the plurality of supporting wheels (11) to roll, then select the appropriate length of the connecting support rod (42) according to the outer diameter of the stainless steel pipe (2), make the moving wheel (421) contact with the inner wall of the stainless steel pipe (2), start the first motor (422) to drive the corresponding moving wheel (421) to rotate, thereby driving the inner cooling mechanism (4) to move inside the stainless steel pipe (2), making the cooling spray cylinder (44) move to the welding position of the stainless steel pipe (2), at this time, the scraping strip (46) contacts with the inner wall of the stainless steel pipe (2); And connect the end of the outer connecting pipe (48) with the outlet of the cooling liquid output system, and connect the outer end of the inner connecting pipe (481) with the suction port of the waste liquid recovery system; Step two, fix the transfer member (32) on the external support through the mounting bracket (38), rotate the two arc-shaped side frames (322), and fix the two second fixed seats (325) by bolts, the arc-shaped middle frame (321) and the two arc-shaped side frames (322) are combined to form a circular middle frame, and the center of the circular middle frame corresponds to the axis position of the stainless steel pipe (2); Then, install two side sealing members (31) on the outer sides of the two stainless steel pipes (2), before installation, select the appropriate caliber size of the half-sealing rubber pad (312) according to the outer diameter of the stainless steel pipe (2), rotate the two half-sealing ring frames (311) to close and combine to form a circular ring sealing frame, and fix the two first fixed seats (315) by bolts, at this time, the inner side of the half-sealing rubber pad (312) contacts with the outer wall of the corresponding stainless steel pipe (2), and the sealing clamps (326) are rotatably clamped in the corresponding circular ring sealing frame, the side end of the sealing clamp (326) contacts with the inner wall of the circular ring sealing frame, and the two circular ring sealing frames and the circular middle frame continuously seal and protect the welding position of the stainless steel pipe (2); Then, install the welding head of the welding machine on the welding seat (33), extend the end of the welding head into the circular middle frame, install the nozzle of the cooling gas output system on the cooling seat (34), extend the end of the nozzle into the circular middle frame, and connect the end of the connecting head (35) with the recovery end of the waste gas recovery system; Step three, control the stainless steel pipe (2) to rotate, use the welding head to rotate the welding position of the stainless steel pipe (2) for welding, and rotate the two arc-shaped side frames (322) on the arc-shaped middle frame (321). At the same time, the cooling gas output system is started, the cooling gas is sprayed into the circular middle frame between the first sealing plate (36) and the second sealing plate (37) through the nozzle, the outside of the welded part after welding is gas cooled, and the waste gas recovery system is started, the waste gas generated after cooling is sucked and recovered through the connecting head (35); The cooling liquid output system and the waste liquid recovery system are started at the same time, the cooling liquid is introduced into the cooling spray cylinder (44) through the outer connecting pipe (48), the flow guide middle cylinder (43), the second pipe (431) and the first pipe (442), and is sprayed out through a plurality of spray grooves (441), and is sprayed on the inside of the stainless steel pipeline (2) to cool the inside of the stainless steel pipeline (2), the waste water after cooling flows to the inside of the stainless steel pipeline (2), is sucked into the suction bottom frame (45) through the suction groove (451), and is discharged in time through the third pipe (452), the fourth pipe (471), the suction middle pipe (47) and the inner connecting pipe (481); During the period, the second motor (492) is started to drive the transmission gear (491) to drive the transmission gear ring (49) and the flow guide middle cylinder (43) to rotate, the rotation directions of the flow guide middle cylinder (43) and the stainless steel pipeline (2) are opposite, so that the suction bottom frame (45) and the scraping strip (46) are always located at the bottom position.

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