An in-pipe welding cleaner

Abstract

The present invention discloses an in-pipe welding cleaner, which relates to the technical field of engineering welding equipment. It includes a machine body, a rotating outer shell rotatably installed in the middle of the machine body, and an internal welding gun fixedly installed inside the rotating outer shell. A protective mechanism is arranged at the end of the machine body; an auxiliary mechanism is arranged outside the protective mechanism. The auxiliary mechanism includes a fixed plate fixedly installed on the outside of the rotating ring plate. A first connecting rod and a second connecting rod are rotatably installed on the outside of the fixed plate. The ends of the first connecting rod and the second connecting rod are jointly rotatably connected to a cavity part; A locking mechanism is arranged in the middle of the machine body to assist the internal welding gun in preliminary positioning. The in-pipe welding cleaner disclosed by the present invention has the effects of multi-function, high stability and high working efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline welding equipment, and particularly relates to a pipeline internal welding cleaner. Background Art

[0002] Welding, also known as fusion welding, is a manufacturing process and technology for joining metals or other thermoplastic materials such as plastics by means of heating, high temperature or high pressure; there are many energy sources for modern welding, including gas flames, electric arcs, lasers, electron beams, friction, and ultrasonic waves, etc.; in addition to being used in factories.

[0003] For the welding process of large-diameter long-distance pipelines and water conservancy and hydropower metal pipelines, an internal pipeline welding machine based on arc welding is usually used to weld the pipeline welds. During the use of this internal pipeline welding machine using arc welding, the internal welding machine needs to be assembled into one of the pipelines to be welded first, and then another pipeline is hoisted for port alignment before welding; before welding, this type of internal pipeline welding machine needs to use a positioning unit to control the welding point of the internal welding machine to the weld of the pipeline. However, the positioning unit assembled on the existing internal welding machine has a simple structure and can only perform single extrusion positioning. Both the positioning efficiency and functionality need to be improved, and the welding slag in the pipeline welding needs to be manually cleaned up for a second time, which is very inconvenient. Summary of the Invention

[0004] The present invention discloses a pipeline internal welding cleaner, aiming to solve the technical problems that in the existing pipeline internal welding machine, before welding, a positioning unit is required to control the welding point of the internal welding machine to the weld of the pipeline, but the positioning unit assembled on the existing internal welding machine has a simple structure and can only perform single extrusion positioning, and both the positioning efficiency and functionality need to be improved, and it is not convenient for cleaning.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A pipeline internal welding cleaner includes a machine body, a rotating outer shell rotatably installed in the middle of the machine body, and an internal welding gun fixedly installed inside the rotating outer shell. A protection mechanism for protecting the equipment is arranged at the end of the machine body. The protection mechanism includes a fixed ring plate fixedly installed at the end of the machine body. A rotating ring plate is rotatably installed inside the fixed ring plate, and a front machine cage is fixedly installed on the outer side of the rotating ring plate.

[0007] An auxiliary mechanism for assisting the positioning, welding, and removal of oxide scale of the internal welding gun is arranged on the outer side of the protection mechanism. A plurality of the auxiliary mechanisms are provided. The auxiliary mechanism includes a fixed plate fixedly installed on the outer side of the rotating ring plate. A first connecting rod and a second connecting rod are rotatably installed on the outer side of the fixed plate, and the ends of the first connecting rod and the second connecting rod are jointly rotatably connected to an inner cavity member.

[0008] A locking mechanism for preliminarily positioning the inner welding torch is provided in the middle of the machine body;

[0009] The machine body is preliminarily positioned through the locking mechanism, and the protective mechanism and the auxiliary mechanism are used to assist the inner welding torch to position, weld and remove oxide scale on the welds of two pipes;

[0010] A number of evenly distributed air jet holes are provided on the end face of the machine body. The machine body can move inside the pipeline. While moving, the air jet holes blow air in the moving direction of the machine body to blow the impurities generated by welding inside the pipeline towards the pipeline opening for cleaning.

[0011] By providing a protective mechanism at the end of the machine body of the in-pipe welder, the protective mechanism is used to protect the end of the machine body to ensure the structural strength when the in-pipe welder moves along the inside of the pipeline. When the in-pipe welder is inside a pipeline, the operation of the auxiliary mechanism drives the machine body to move slightly, so as to position the inner welding torch at the weld of the pipeline. The synchronously started locking mechanism can squeeze against the inner wall of the pipeline, thereby strengthening the positioned machine body, so as to ensure the stability of the equipment during operation. When hoisting another pipeline that fits the weld of the pipeline and moving, the reset-started auxiliary mechanism can squeeze and push against the inner wall of the pipeline, thereby fixing the moving direction of the hoisted pipeline, assisting the precise docking of the two pipelines. At the same time, after the welding of the pipelines is completed, the continuously started auxiliary mechanism can rotate synchronously with the rotation of the inner welding torch to scrape the oxide scale at the welds of the two pipelines, so as to realize multiple functions of positioning, auxiliary docking and removing oxide scale, thereby further improving the functionality of the equipment.

[0012] In a preferred solution, the protective mechanism further includes a number of evenly distributed bases fixedly installed inside the front machine cage. A hydraulic push rod is rotatably installed in the middle of each base. The auxiliary mechanism is installed at the end of the output shaft of the hydraulic push rod.

[0013] By arranging the front machine cage on the rotating ring plate rotatably connected to the fixed ring plate, when the hydraulic push rod pushes the auxiliary mechanism to squeeze and contact the outside of the inner welding torch, along with the rotation of the inner welding torch, the synchronously driven front machine cage and the rotating ring plate can rotate synchronously, so as to rotate synchronously with the auxiliary mechanism to scrape the oxide scale at the weld. While the front machine cage protects the machine body of the equipment, it ensures the perfection of the operation of the auxiliary mechanism.

[0014] In a preferred embodiment, the auxiliary mechanism further includes a connection between the end of the inner cavity member and the output end of the hydraulic push rod. A positioning member is slidably mounted on the top of each inner cavity member, and an electric control air valve is installed at the end of each inner cavity member. The positioning member is driven to move up and down by the electric control air valve.

[0015] By providing an inner cavity member rotatably connected to the fixed plate and connected to the output end of the hydraulic push rod, a positioning member structure affected by the electric control air valve is provided at the top of the inner cavity member; when the machine body is initially placed inside a pipeline, the outward extension of the hydraulic push rod is used to push the inner cavity member and the positioning member to move synchronously, and the positioning member presses against the side wall of the pipeline to form a preliminary positioning of the machine body; when the welds of another pipeline being hoisted are butt-welded, the inner cavity member and the positioning member pushed by the hydraulic push rod a second time can press against the inner wall of the pipeline to keep the butt-welding centers of the two pipelines the same, forming an auxiliary push and positioning of the pipelines; when the two pipelines are welded, the positioning member pushed by the hydraulic push rod can cooperate with the rotation of the inner welding torch to scrape the oxide scale at the welds of the two pipelines, thereby realizing multiple functions of positioning, auxiliary butt-welding, and removing oxide scale, and further improving the functionality of the equipment.

[0016] In a preferred embodiment, the locking mechanism includes a third connecting rod rotatably mounted in the middle of the machine body. The number of the third connecting rods is several and they are evenly distributed in pairs. The ends of each pair of the third connecting rods are jointly rotatably connected to a locking member. A plurality of locking wheels are rotatably mounted inside each locking member, and a plurality of electric push rods are evenly rotatably mounted in the middle of the machine body. The output end of each electric push rod is correspondingly rotatably connected to the side of a locking member.

[0017] By providing a locking member structure rotatably connected to the machine body, the locking member is driven by the electric push rod and can rotate around the machine body to drive the internal locking wheels to press against and contact the inner wall of the pipeline, thereby forming a locking and fixing of the entire equipment, and at the same time can assist the equipment to move along the inner wall of the pipeline to maintain the stability of the equipment.

[0018] In a preferred embodiment, scraping blades are symmetrically mounted on both sides of the positioning member, and a resistance increasing groove is provided at the top of the positioning member.

[0019] By providing a resistance increasing groove to cooperate with the extrusion and push of the positioning member against the inner wall of the pipeline, the pipeline being hoisted and the fixed pipeline are assisted to be butted. After welding, the positioning member rotating synchronously with the inner welding torch can drive the scraping blades to rotate synchronously, thereby scraping the oxide scale at the weld, thus improving the functionality of the equipment.

[0020] As can be seen from the above, compared with the prior art, the pipeline internal welding and cleaning machine provided by the present invention has the following improvements and advantages:

[0021] First: By arranging a front machine cage rotatably mounted on a rotating ring plate at the end of the machine body, when the hydraulic push rod drives the auxiliary mechanism to squeeze and contact the outside of the internal welding torch, along with the rotation of the internal welding torch, the synchronously driven front machine cage and the rotating ring plate can rotate synchronously, so as to cooperate with the auxiliary mechanism to scrape the scale at the weld. While the front machine cage protects the machine body of this equipment, it ensures the perfection of the equipment operation. And when this equipment initially enters the inside of a pipeline, a locking part structure rotatably connected to the machine body is additionally arranged. Driven by the electric push rod, the locking part can rotate around the machine body and drive the internal locking wheel to squeeze and contact the inner wall of the pipeline, so as to form the locking and fixing of the whole equipment, and at the same time can assist this equipment to move along the inner wall of the pipeline, thus further ensuring the stability of this equipment and the perfection of the operation.

[0022] Second: By arranging an inner cavity part rotatably connected to a fixed plate and connected to the output end of the hydraulic push rod, a positioning part structure affected by an electric control air valve is arranged at the top of the inner cavity part; when this machine body is initially placed inside a pipeline, the outward extension of the hydraulic push rod is used to drive the inner cavity part and the positioning part to move synchronously. The positioning part squeezes against the side wall of the pipeline to form the preliminary positioning of the machine body; when the welds of another pipeline being hoisted are butt-welded, the inner cavity part and the positioning part pushed by the hydraulic push rod for the second time can squeeze against the inner wall of the pipeline to keep the centers of the two pipelines the same when they are butted, so as to form the auxiliary pushing and positioning of the pipeline; when the two pipelines are welded, the positioning part pushed by the hydraulic push rod can cooperate with the rotation of the internal welding torch to scrape the scale at the welds of the two pipelines, so as to realize multiple functions of positioning, auxiliary butt-joint and scale removal, and greatly improve the functionality and operation efficiency of the traditional in-pipe welder. Description of the Drawings

[0023] Figure 1 It is a schematic diagram of the overall structure of a pipeline internal welding cleaning machine proposed by the present invention.

[0024] Figure 2 It is a pipeline internal welding cleaning machine proposed by the present invention Figure 1 The enlarged view of the structure at A in it.

[0025] Figure 3 It is a side view of the overall structure of a pipeline internal welding cleaning machine proposed by the present invention.

[0026] Figure 4 It is a schematic diagram of the state when the auxiliary mechanism of a pipeline internal welding cleaning machine proposed by the present invention is initially positioned.

[0027] Figure 5 It is an exploded view of the structure of the protection mechanism of a pipeline internal welding cleaning machine proposed by the present invention.

[0028] Figure 6 This is a structural sectional view of the protection mechanism of a pipe internal welding cleaner proposed by the present invention.

[0029] Figure 7 This is an exploded view of the auxiliary mechanism structure of a pipe internal welding cleaner proposed by the present invention.

[0030] Figure 8 This is a structural sectional view of the auxiliary mechanism of a pipe internal welding cleaner proposed by the present invention.

[0031] Figure 9 This is a flow chart of the operation process of a pipe internal welding cleaner proposed by the present invention.

[0032] In the figure: 1, body; 2, rotating housing; 3, internal welding gun; 4, protection mechanism; 401, fixed ring plate; 402, rotating ring plate; 403, front machine cage; 404, base; 405, hydraulic push rod; 5, auxiliary mechanism; 501, fixed plate; 502, first connecting rod; 503, second connecting rod; 504, inner cavity part; 505, positioning part; 506, electric control air valve; 507, first spring; 508, scraper; 509, resistance increasing groove; 6, locking mechanism; 601, third connecting rod; 602, locking part; 603, locking wheel; 604, electric push rod; 7, air storage tank; 8, walking wheel; 9, tensioning cylinder; 10, air jet hole. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0034] A pipe internal welding cleaner disclosed by the present invention is mainly applied to the scenario during internal welding of pipes.

[0035] Refer to Figures 1 to 9 , a pipe internal welding cleaner, including a body 1, a rotating housing 2 rotatably installed in the middle of the body 1, and an internal welding gun 3 fixedly installed inside the rotating housing 2. A protection mechanism 4 for protecting the equipment is provided at the end of the body 1. The protection mechanism 4 includes a fixed ring plate 401 fixedly installed at the end of the body 1. A rotating ring plate 402 is rotatably installed inside the fixed ring plate 401, and a front machine cage 403 is fixedly installed on the outer side of the rotating ring plate 402;

[0036] An auxiliary mechanism 5 for assisting the positioning, welding and scale removal of the inner welding torch 3 is arranged on the outer side of the protection mechanism 4. A number of auxiliary mechanisms 5 are provided. The auxiliary mechanism 5 includes a fixed plate 501 fixedly installed on the outer side of the rotating ring plate 402. A first connecting rod 502 and a second connecting rod 503 are rotatably installed on the outer side of the fixed plate 501. The ends of the first connecting rod 502 and the second connecting rod 503 are jointly rotatably connected to an inner cavity member 504;

[0037] A locking mechanism 6 for assisting the initial positioning of the inner welding torch 3 is arranged in the middle of the machine body 1;

[0038] The machine body 1 is initially positioned through the locking mechanism 6, and the protection mechanism 4 and the auxiliary mechanism 5 are coordinated to assist the inner welding torch 3 to position, weld and remove the scale from the welds of the two pipes;

[0039] A number of uniformly distributed air spray holes 10 are arranged on the end face of the machine body 1. The machine body 1 can move along the inside of the pipeline. While moving, the air spray holes 10 blow air in the moving direction of the machine body 1, so as to blow the impurities generated by welding in the pipeline towards the pipeline opening for cleaning.

[0040] In this embodiment: during use, the operator hoists and slowly places the machine body 1 into the single pipeline. During the process of the machine body 1 slowly entering the pipeline, the auxiliary mechanism 5 located outside the protection mechanism 4 initially operates and presses against the outer wall of the pipeline, forming a preliminary positioning of the machine body 1. The specific state is as Figure 4 shown; at the same time, the locking mechanism 6 located outside the machine body 1 operates. The locking mechanism 6 presses against and contacts the inner wall of the pipeline and forms a fixation of the machine body 1. After the fixation of the machine body 1 is completed, at this time, the auxiliary mechanism 5 retracts and resets. The operator hoists another pipeline to the end of the machine body 1. At the same time, the auxiliary mechanism 5 is started for the second time. While extending outwards, it presses against and contacts the inner wall of the hoisted pipeline, and pushes the hoisted pipeline to slowly align with the end of the fixed pipeline. The specific state is as Figure 9 shown until the welds of the two pipes are aligned; at this time, the rotating housing 2 rotates and drives the inner welding torch 3 to rotate synchronously. The rotating inner welding torch 3 slowly welds the welds of the two pipes until the welding of the pipeline is completed; after the welding of the pipeline is completed, at this time, the auxiliary mechanism 5 continues to extend towards the positioning of the inner welding torch 3 and contacts the inner welding torch 3. The rotating housing 2 is started again, driving the inner welding torch 3 to squeeze and push the auxiliary mechanism 5, causing the auxiliary mechanism 5 to rotate around the welds of the inner walls of the two pipes, and shoveling off the scale at the welds.

[0041] Among them, an air storage tank 7 is installed at the end of the machine body 1, and walking wheels 8 are symmetrically installed on the outer side of the air storage tank 7. The machine body 1 is driven by the walking wheels 8 to move autonomously along the inside of the pipeline. A number of tension cylinders 9 are evenly installed on the outer side of the machine body 1. The tension cylinders 9 are horizontally distributed on the side of the rotating housing 2. When the internal welding torch 3 performs welding, a number of tension cylinders 9 extend outwards synchronously and press against the inner wall of the pipeline, so as to maintain the stability during the welding of the internal welding torch 3.

[0042] In the above solution, considering that in order to prevent the machine body 1 from being damaged when moving along the inside of the pipeline, the specific operation is as follows.

[0043] Refer to Figure 1 、 Figures 3 to 6 In a preferred embodiment, the protection mechanism 4 further includes a number of evenly distributed bases 404 fixedly installed inside the front machine cage 403. A hydraulic push rod 405 is rotatably installed in the middle of each base 404, and the auxiliary mechanism 5 is installed at the end of the output shaft of the hydraulic push rod 405.

[0044] In this embodiment: When the machine body 1 moves along the inside of the pipeline, the front machine cage 403 located at the end of the machine body 1 will protect the end of the machine body 1; and when the machine body 1 slowly enters the inside of a single pipeline, at this time, the hydraulic push rod 405 located on the base 404 is started, and the output end of the hydraulic push rod 405 extends outwards and drives the auxiliary mechanism 5 to move synchronously. The moving auxiliary mechanism 5 will press against the outer wall of the pipeline to form a preliminary positioning of the machine body 1; and after the welding of the pipeline is completed, at this time, the hydraulic push rod 405 continues to extend outwards, pushing the auxiliary mechanism 5 to continue extending towards the position of the internal welding torch 3 and contacting the internal welding torch 3. Then the rotating housing 2 is started again, driving the internal welding torch 3 to press and push the auxiliary mechanism 5, so that the auxiliary mechanism 5 drives the front machine cage 403 and the rotating ring plate 402 to rotate around the fixed ring plate 401, thereby shoveling off the oxide skin at the weld.

[0045] In the above solution, considering that in order to ensure the perfection and stability of the whole set of operation of this equipment, the specific operation is as follows.

[0046] Refer to Figure 1 、 Figures 3 to 8 In a preferred embodiment, the auxiliary mechanism 5 further includes that the end of the inner cavity member 504 is connected to the output end of the hydraulic push rod 405. A positioning member 505 is slidably installed on the top of each inner cavity member 504, and an electric control air valve 506 is installed at the end of each inner cavity member 504. The electric control air valve 506 drives the positioning member 505 to move up and down.

[0047] In this embodiment: When the machine body 1 slowly enters the inside of a single pipe, at this time, the hydraulic push rod 405 on the base 404 is activated. The output end of the hydraulic push rod 405 extends outward and drives the inner cavity part 504 and the positioning part 505 to move synchronously. The moving positioning part 505 presses against the outer wall of the pipe, forming a preliminary positioning of the machine body 1. The specific state is as shown in Figure 4 ; When the operator hoists another pipe to the end of the machine body 1, at the same time, the hydraulic push rod 405 drives the inner cavity part 504 and the positioning part 505 to move for the second time. At this time, the electric control air valve 506 is activated synchronously. Along with the movement of the inner cavity part 504, the positioning part 505 at the top of the inner cavity part 504 will move synchronously and press against the inner wall of the hoisted pipe, forming an extrusion and push on the hoisted pipe. At the same time, with the extrusion, the air pressure inside the inner cavity part 504 will gush out through the electric control air valve 506, thereby adaptively reducing the relative height between the positioning part 505 and the inner cavity part 504, causing the hoisted pipe being pushed to slowly align with the end of the fixed pipe. The specific state is as shown in Figure 9 ; After completing the welding of the pipe, at this time, the hydraulic push rod 405 continues to extend outward, pushing the inner cavity part 504 and the positioning part 505 to continue extending towards the position of the inner welding torch 3 and contacting the inner welding torch 3. Then the rotating outer shell 2 is started again, driving the inner welding torch 3 to squeeze and push the positioning part 505, causing the positioning part 505 to drive the front cage 403 and the rotating ring plate 402 to rotate around the fixed ring plate 401, thereby shoveling off the oxide skin at the weld.

[0048] Among them, two symmetrically distributed first springs 507 are connected between each inner cavity part 504 and the positioning part 505. When the positioning part 505 loses the extrusion restriction, the reset and bouncing first spring 507 will push the positioning part 505, causing the positioning part 505 to move upward for reset.

[0049] Furthermore, it is supplementary explained that: Shovels 508 are symmetrically installed on both sides of the positioning part 505, and a resistance increasing groove 509 is arranged at the top of the positioning part 505; when the positioning part 505 contacts the pipe, it will increase the friction with the pipe through the resistance increasing groove 509, so as to smoothly push the pipe. When the positioning part 505 rotates while fitting inside the pipe weld, the shovels 508 on both sides of the positioning part 505 will rotate synchronously, thereby shoveling off the oxide skin at the weld. When the machine body 1 slides and moves along the inside of the pipe, the synchronous running air jet holes 10 will blow the shoveled oxide skin, thereby driving the oxide skin to move synchronously along the inside of the pipe until the oxide skin falls out from the port of the pipe.

[0050] In the above solution, considering to further ensure the stability of the machine body 1 after entering the inside of the pipe, the specific operation is as follows.

[0051] Refer to Figures 1 to 2, in a preferred embodiment, the locking mechanism 6 includes a third connecting rod 601 rotatably mounted in the middle of the body 1. The number of the third connecting rods 601 is several and they are evenly distributed in pairs. The ends of each pair of the third connecting rods 601 are jointly rotatably connected to a locking member 602. A plurality of locking wheels 603 are rotatably mounted inside each locking member 602. A plurality of electric push rods 604 are evenly and rotatably mounted in the middle of the body 1. The output end of each electric push rod 604 is correspondingly rotatably connected to the side surface of a locking member 602.

[0052] In this embodiment: When the hydraulic push rod 405 located on the base 404 is started, the output end of the hydraulic push rod 405 extends outwards and drives the inner cavity member 504 and the positioning member 505 to move synchronously. The moving positioning member 505 will press against the outer wall of the pipeline, forming a preliminary positioning of the body 1. At this time, the electric push rod 604 is started. The output end of the electric push rod 604 extends outwards and pushes the locking member 602, causing the locking member 602 to rotate around the third connecting rod 601. While the locking member 602 moves, it drives the locking wheel 603 to press against the inside of the pipeline, completing the preliminary positioning of the body 1. The specific structure is as Figure 9 shown.

[0053] Working principle: During use, the operator hoists and slowly places the body 1 into the inside of a single pipeline. During the process of the body 1 slowly entering the inside of a single pipeline, at this time, the hydraulic push rod 405 located on the base 404 is started. The output end of the hydraulic push rod 405 extends outwards and drives the inner cavity member 504 and the positioning member 505 to move synchronously. The moving positioning member 505 will press against the outer wall of the pipeline, forming a preliminary positioning of the body 1. The specific state is as Figure 4 shown; at the same time, the electric push rod 604 is started. The output end of the electric push rod 604 extends outwards and pushes the locking member 602, causing the locking member 602 to rotate around the third connecting rod 601. While the locking member 602 moves, it drives the locking wheel 603 to press against the inside of the pipeline, completing the fixation of the body 1. The specific structure is as Figure 9 shown; then the output end of the hydraulic push rod 405 retracts and drives the inner cavity member 504 and the positioning member 505 to move back. At this time, the operator hoists another pipeline to the end of the body 1. At the same time, the hydraulic push rod 405 drives the inner cavity member 504 and the positioning member 505 to move secondly, and the electric control air valve 506 is started synchronously. Along with the movement of the inner cavity member 504, the positioning member 505 located at the top of the inner cavity member 504 will move synchronously and press against the inner wall of the hoisted pipeline, forming an extrusion and push on the hoisted pipeline. At the same time, with the extrusion, the air pressure inside the inner cavity member 504 will gush out through the electric control air valve 506, thereby adaptively reducing the relative height between the positioning member 505 and the inner cavity member 504, causing the hoisted pipeline being pushed to slowly align with the end of the fixed pipeline. The specific state is asFigure 9 As shown; then the rotating outer shell 2 rotates and drives the internal welding torch 3 to rotate synchronously. The rotating internal welding torch 3 will slowly weld the welds of the two pipes until the welding of the pipes is completed; after the welding of the pipes is completed, at this time, the hydraulic push rod 405 continues to extend outwards, pushing the inner cavity part 504 and the positioning part 505 to continue extending towards the position of the internal welding torch 3 and contacting the internal welding torch 3. Then the rotating outer shell 2 is started again, driving the internal welding torch 3 to squeeze and push the positioning part 505, causing the positioning part 505 to drive the front machine cage 403 and the rotating ring plate 402 to rotate around the fixed ring plate 401, so as to use the scraping blade 508 to scrape off the scale at the weld, and complete the entire work process.

[0054] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A cleaning machine for internal welding of pipelines, comprising a machine body (1), a rotating outer shell (2) rotatably installed in the middle of the machine body (1), and an internal welding gun (3) fixedly installed inside the rotating outer shell (2), characterized in that, A protective mechanism (4) for protecting the equipment is provided at the end of the machine body (1). The protective mechanism (4) includes a fixed ring plate (401) fixedly installed at the end of the machine body (1). A rotating ring plate (402) is rotatably installed inside the fixed ring plate (401). A front machine cage (403) is fixedly installed on the outer side of the rotating ring plate (402). The protective mechanism (4) further includes a plurality of evenly distributed bases (404) fixedly installed inside the front machine cage (403). A hydraulic push rod (405) is rotatably installed in the middle of each base (404). An auxiliary mechanism (5) for assisting the positioning, welding, and oxide scale removal of the inner welding torch (3) is provided on the outer side of the protective mechanism (4). A plurality of auxiliary mechanisms (5) are provided. The auxiliary mechanism (5) includes a fixed plate (501) fixedly installed on the outer side of the rotating ring plate (402). A first connecting rod (502) and a second connecting rod (503) are rotatably installed on the outer side of the fixed plate (501). The ends of the first connecting rod (502) and the second connecting rod (503) are jointly rotatably connected to a cavity member (504). The auxiliary mechanism (5) further includes that the end of the cavity member (504) is connected to the output end of the hydraulic push rod (405). A positioning member (505) is slidably installed on the top of each cavity member (504). An electric control air valve (506) is installed at the end of each cavity member (504). The electric control air valve (506) drives the positioning member (505) to move up and down. Scraper blades (508) are symmetrically installed on both sides of the positioning member (505). A locking mechanism (6) for assisting the initial positioning of the inner welding torch (3) is provided in the middle of the machine body (1). The machine body (1) is initially positioned through the locking mechanism (6), and the protective mechanism (4) and the auxiliary mechanism (5) are coordinated to assist the inner welding torch (3) in positioning, welding, and oxide scale removal operations on the welds of two pipes. A plurality of evenly distributed air jet holes (10) are provided on the end face of the machine body (1). The machine body (1) can move inside the pipe. While moving, the air jet holes (10) blow air in the moving direction of the machine body (1) to blow the impurities generated during welding in the pipe towards the pipe orifice for cleaning. After completing the welding of the pipe, at this time, the auxiliary mechanism (5) continues to extend towards the positioning of the inner welding torch (3) and contacts the inner welding torch (at this time, the auxiliary mechanism (5) continues to extend towards the positioning of the inner welding torch (3) and contacts the inner welding torch (3)), and the rotating housing (2) starts again, driving the inner welding torch (3) to squeeze and push the auxiliary mechanism (5), causing the auxiliary mechanism (5) to rotate around the welds on the inner walls of the two pipes, and scraping off the oxide scale at the welds.

2. The internal pipe welding cleaner according to claim 1, characterized in that, The locking mechanism (6) includes a third connecting rod (601) rotatably installed in the middle of the body (1). The number of the third connecting rods (601) is several and they are evenly distributed in pairs. The ends of each pair of the third connecting rods (601) are jointly rotatably connected to a locking member (602). A number of locking wheels (603) are rotatably installed inside each locking member (602). A number of electric push rods (604) are evenly and rotatably installed in the middle of the body (1). The output end of each electric push rod (604) is correspondingly rotatably connected to the side surface of a locking member (602).

3. The internal pipe welding cleaner according to claim 1, wherein Two symmetrically distributed first springs (507) are connected between each inner cavity member (504) and the positioning member (505).

4. The internal pipe welding cleaner according to claim 1, characterized in that, A resistance increasing groove (509) is provided at the top of the positioning member (505).

5. The internal pipe welding cleaner according to claim 1, characterized in that, An air storage tank (7) is installed at the end of the body (1), and traveling wheels (8) are symmetrically installed on the outer side of the air storage tank (7).

6. The internal pipe welding cleaner according to claim 1, wherein, A number of tensioning cylinders (9) are evenly installed on the outer side of the body (1), and the tensioning cylinders (9) are horizontally distributed on the side surface of the rotating outer shell (2).

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