Pipeline butt joint device for fire engineering installation

Abstract

The invention discloses a pipeline butt joint device for fire engineering installation, and particularly relates to the technical field of pipeline welding device.The pipeline butt joint device comprises an operation table, a fixing assembly is arranged in the middle of the upper end of the operation table, a welding assembly is arranged on the front side of the upper end of the operation table, and a swing assembly is arranged on the top wall of the inner surface of a protective cover; correcting assemblies are symmetrically arranged at the upper end of the operation table, and a blowing and sucking assembly is arranged on the rear side of the upper end of the operation table. The swing assembly is matched with the limiting block, so that the welding head swings in a reciprocating mode in the operation process, the incomplete fusion defect of the edge of a welding seam is eliminated, welding seam sinking or protruding caused by uneven gaps is avoided, the welding seam forming flatness is guaranteed, the two elastic arc-shaped plates are used for tightly abutting against the outer surface of a vertical pipeline all the time, welding seam thermal deformation is actively counteracted, and the welding quality is improved. And through operation of the blowing and sucking assembly, inert gas flows directionally, weld metal oxidation and nitridation are avoided, and meanwhile residual inert gas and welding fume are recycled.

Description

Technical Field

[0001] This invention relates to the field of pipe welding equipment technology, and in particular to a pipe connection device for fire protection engineering installation. Background Technology

[0002] In fire protection engineering installation, pipe butt welding, such as tees, is a core process, and its welding quality directly affects the sealing and structural stability of the fire protection system. Current technologies for pipe butt welding largely rely on manual positioning or simple tooling, which presents several technical challenges: First, insufficient pipe positioning accuracy; when horizontal and vertical pipes are butt-jointed, coaxiality deviations are prone to occur, and during welding, vibration and thermal stress can cause offsets, leading to misaligned welds and uneven gaps. Second, poor weld formation quality; manual welding or single-track welding devices struggle to achieve uniform fusion of circumferential welds, easily resulting in defects such as incomplete fusion and weld depressions. Furthermore, the weld joint lacks self-adjusting capabilities and cannot handle slight gap fluctuations. Third, lack of thermal deformation control; thermal expansion and contraction in the weld area during welding cause radial deformation, leading to pipe bending and affecting subsequent installation accuracy. Fourth, inadequate welding protection; traditional inert gas protection is mostly static spraying, with rapid gas diffusion, making it difficult to continuously isolate the air, easily causing weld oxidation and nitriding. Simultaneously, welding fumes cannot be effectively recovered, polluting the working environment. These problems seriously affect the installation quality and construction efficiency of fire protection pipelines, and there is an urgent need for an integrated, high-precision pipeline connection device to solve them. Summary of the Invention

[0003] The main objective of this invention is to provide a pipe connection device for fire protection engineering installation, which can effectively solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A pipe connection device for fire protection engineering installation includes an operating platform and a protective cover for protecting the internal structure. A fixing component for fixing pipes for welding is provided in the middle of the upper end of the operating platform. A welding component for welding two pipes is provided on the front side of the upper end of the operating platform. The welding component includes a welding head. A swinging component for driving the welding head to swing is provided on the top wall of the inner surface of the protective cover on the right side of the welding component. A correction component for assisting in the correction of vertical pipes is symmetrically provided on the upper end of the operating platform. A blowing and suction component for guiding gas flow is provided on the rear side of the upper end of the operating platform.

[0005] Preferably, a telescopic roller is fixedly installed in the middle of the top wall of the inner surface of the protective cover, a rotating plate is rotatably installed at the lower end of the telescopic roller, and a fixing ring is fixedly installed in the middle of the outer surface of the telescopic roller.

[0006] Preferably, a rotating roller is rotatably mounted on the upper center of the operating platform, and a fixing seat for fixing a horizontal pipe is fixedly mounted on the upper end of the rotating roller.

[0007] Preferably, the welding assembly includes a circular roller rotatably mounted on the front side of the upper end of the operating table. The lower side of the outer surface of the circular roller is connected to the lower side of the outer surface of the rotating roller. A bidirectional lead screw is fixedly mounted on the upper end of the circular roller. A sliding ring is provided on the outer surface of the bidirectional lead screw. A support rod is fixedly mounted on the rear side of the outer surface of the sliding ring. The upper rear side of the support rod is movably mounted to the welding head of the two pipes being welded.

[0008] Preferably, the welding assembly further includes a guide roller fixedly installed on the front side of the upper end of the operating table, the outer surface of the guide roller being slidably connected to the sliding ring, and a limit block being fixedly installed on the upper side of the front end of the welding head, with a rectangular groove opened at the right end of the limit block.

[0009] Preferably, the swing assembly includes a second round rod rotatably mounted on the top wall of the inner surface of the protective cover. The upper side of the outer surface of the second round rod is connected to the upper side of the outer surface of the bidirectional lead screw. A second cam is fixedly mounted on the lower end of the second round rod. A second limit plate is provided at the lower end of the second cam. Push rollers are fixedly mounted on the left and right ends of the second limit plate. The left side of the outer surface of the push roller is slidably connected to the inner surface of the rectangular groove, and the right side of the outer surface of the push roller is slidably connected to the right side wall of the inner surface of the protective cover.

[0010] Preferably, the correction assembly includes an L-shaped rod fixedly installed on the outer surface of the fixing ring, a wedge block fixedly installed at the lower end of the L-shaped rod, and a vertical plate fixedly installed on the right end of the support rod. A limiting groove is formed at the rear end of the vertical plate, and an L-shaped roller 2 is slidably installed on the inner surface of the limiting groove. A spring is fixedly installed on the front side of the outer surface of the L-shaped roller 2 and the rear end of the vertical plate. The rear right end of the L-shaped roller 2 is fixedly connected to the front end of the L-shaped roller 1.

[0011] Preferably, the correction assembly further includes a telescopic rod fixedly installed on the top wall of the inner surface of the protective cover. An L-shaped roller is fixedly installed at the lower end of the telescopic rod. An elastic arc plate is fixedly installed on the rear side of the left end of the L-shaped roller. A rolling ring is fixedly installed on the front side of the outer surface of the L-shaped roller. The outer surface of the rolling ring is in close contact with the inclined surface of the wedge block.

[0012] Preferably, the blowing and suction assembly includes a round rod rotatably mounted on the rear side of the upper end of the operating table. The lower side of the outer surface of the round rod is connected to the outer surface of the rotating roller. A cam is fixedly mounted on the upper end of the round rod. A limit plate is provided on the upper end of the cam. Push rollers are fixedly mounted on the middle of the left and right ends of the limit plate.

[0013] Preferably, the blowing and suction assembly further includes sliding plates symmetrically slidably mounted on the rear side of the upper end of the operating table. The two sliding plates are respectively fixedly connected to the push roller on the same side at their respective ends close to each other. Airbags are fixedly mounted on the ends of the two sliding plates that are far apart from each other. Fixing plates are fixedly mounted on the ends of the two airbags that are far apart from each other. The two fixing plates are respectively fixedly connected to the upper end of the operating table. Flexible hoses are fixedly mounted on the outer surfaces of the two airbags. Spray plates are fixedly mounted on the side of the two flexible hoses that are far away from the airbags. The upper end of the spray plate on the left side is fixedly connected to the upper surface of the outer surface of the telescopic roller, and the lower end of the spray plate on the right side is fixedly connected to the right side of the upper end of the operating table.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention uses a swinging component in conjunction with a limiting block to make the welding head swing back and forth during operation, eliminating incomplete fusion defects at the weld edge, improving the bonding strength between the weld and the base material, and the small-angle swing can adapt to slight gap fluctuations during the butt joint process, avoiding weld depressions or protrusions caused by uneven gaps, and ensuring the flatness of the weld formation. At the same time, during the welding process, two elastic arc plates are used to keep in close contact with the outer surface of the vertical pipe, actively counteracting the thermal deformation of the weld, and avoiding the radial expansion and contraction deformation caused by high temperature in the weld area, which can lead to pipe bending.

[0015] 2. This invention uses a blowing and suction assembly to direct the flow of inert gas, preventing air (oxygen, nitrogen) from contacting the high-temperature molten pool, thus avoiding oxidation and nitriding of the weld metal. At the same time, it recovers residual inert gas and welding fumes, prevents disorderly diffusion of protective gas, improves gas utilization, and reduces the pollution of the operating environment by welding fumes. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 3 This is a schematic diagram of the fixed component structure of the present invention; Figure 4 This is a schematic diagram of the welding assembly structure of the present invention; Figure 5 This is a schematic diagram of the swing component structure of the present invention; Figure 6 This is a schematic diagram of the correction component structure of the present invention; Figure 7 This is a schematic diagram of the correction component of the present invention from another perspective; Figure 8 This is a schematic diagram of the blowing and suction assembly structure of the present invention; Figure 9 This is a schematic diagram of the blow-wash assembly of the present invention from another perspective.

[0017] In the diagram: 1. Operating platform; 11. Fixing ring; 12. Telescopic roller; 13. Rotating plate; 2. Fixing assembly; 21. Fixing base; 22. Rotating roller; 3. Blowing / suction assembly; 31. Round rod one; 32. Cam one; 33. Limiting plate one; 34. Push roller one; 35. Sliding plate; 36. Airbag; 37. Spray plate; 38. Hose; 39. Fixing plate; 4. Correction assembly; 41. L-shaped rod; 42. Wedge block; 43. Telescopic rod; 44. 45. L-shaped roller 1; 46. Elastic arc plate; 47. L-shaped roller 2; 48. Vertical plate; 49. Limiting groove; 40. Spring; 51. Rolling ring; 62. Welding assembly; 53. Circular roller; 54. Guide roller; 55. Bidirectional lead screw; 56. Sliding ring; 57. Support rod; 58. Welding head; 59. Limiting block; 60. Rectangular groove; 61. Swinging assembly; 62. Circular rod 2; 63. Cam 2; 64. Limiting plate 2; 65. Push roller 2. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0019] like Figure 1 and Figure 2 As shown, a pipe connection device for fire protection engineering installation includes an operating platform 1 and a protective cover for protecting the internal structure. A fixing component 2 for fixing pipes for welding is provided in the middle of the upper end of the operating platform 1. A welding component 5 for welding two pipes is provided on the front side of the upper end of the operating platform 1. The welding component 5 includes a welding head 56. A swinging component 6 for driving the welding head 56 to swing is provided on the top wall of the inner surface of the protective cover on the right side of the welding component 5. A correction component 4 for assisting in correcting vertical pipes is symmetrically provided on the upper end of the operating platform 1. A blowing and suction component 3 for guiding gas flow is provided on the rear side of the upper end of the operating platform 1.

[0020] During the installation of fire protection engineering, many T-shaped pipes are used. Before installing the T-shaped pipes, the two pipes need to be connected and welded together.

[0021] like Figure 3 A telescopic roller 12 is fixedly installed in the middle of the top wall of the inner surface of the protective cover. A rotating plate 13 is rotatably installed at the lower end of the telescopic roller 12. When welding pipes, the rotating plate 13 assists in pressing the vertical pipes, which facilitates the connection and forming of the horizontal pipes and the vertical pipes. A fixing ring 11 is fixedly installed in the middle of the outer surface of the telescopic roller 12.

[0022] The aforementioned telescopic roller 12 is a commonly used technique in the prior art. When welding two pipes, the lower end of the telescopic roller 12 descends, causing the rotating plate 13 to descend, thereby blocking the upper end of the vertical pipe and preventing the vertical pipe from shifting during the welding process.

[0023] like Figure 3 A rotating roller 22 is rotatably installed in the middle of the upper end of the operating table 1. A fixing seat 21 for fixing horizontal pipes is fixedly installed on the upper end of the rotating roller 22. During the process of connecting horizontal and vertical pipes, the two pipes to be connected and welded are slowly rotated by the cooperation of the fixing seat 21 and the rotating roller 22.

[0024] The aforementioned rotating roller 22 is a conventional technical means in the prior art. During the docking of the two pipes, the rotating roller 22 runs, driving the fixed seat 21 to rotate slowly.

[0025] Furthermore, in the process of preparing to weld the two pipes together, the horizontal pipe is placed at the upper middle of the fixed seat 21, and the vertical pipe is aligned with the position of the horizontal pipe to be welded. Then, the telescopic roller 12 runs, and the lower end of the telescopic roller 12 drives the rotating plate 13 to descend until the lower end of the rotating plate 13 contacts and presses against the upper end of the vertical pipe. Through the cooperation of the rotating plate 13 with the rotating roller 22 and the fixed seat 21, the rotating roller 22, the fixed seat 21, the two pipes and the rotating plate 13 are slowly rotated during the welding of the two pipes.

[0026] like Figure 4 The welding assembly 5 includes a circular roller 51 rotatably mounted on the front side of the upper end of the operating table 1. The lower side of the outer surface of the circular roller 51 is connected to the lower side of the outer surface of the rotating roller 22. A bidirectional lead screw 53 is fixedly mounted on the upper end of the circular roller 51. A sliding ring 54 is provided on the outer surface of the bidirectional lead screw 53. A support rod 55 is fixedly mounted on the rear side of the outer surface of the sliding ring 54. The upper rear side of the support rod 55 is movably mounted to the welding head 56 for welding the two pipes.

[0027] It should be noted that the above-mentioned circular roller 51 and rotating roller 22 are connected by a belt pulley transmission device commonly used in the prior art. At the same time, the radius of the belt pulley fixedly connected to the outer surface of the circular roller 51 is smaller than the radius of the belt pulley fixedly connected to the outer surface of the rotating roller 22, that is, the rotation speed of the circular roller 51 is higher than the rotation speed of the rotating roller 22.

[0028] Specifically, after the rotating plate 13 and the rotating roller 22 fix the two pipes, the rotating roller 22 runs and drives the two pipes to rotate slowly. During the operation of the rotating roller 22, the circular roller 51 is driven to rotate rapidly, which in turn causes the circular roller 51 to drive the bidirectional lead screw 53 to rotate.

[0029] like Figure 4 The welding assembly 5 also includes a guide roller 52 fixedly installed on the front side of the upper end of the operating table 1, and the outer surface of the guide roller 52 is slidably connected to the sliding ring 54.

[0030] Furthermore, during the rotation of the bidirectional lead screw 53 driven by the circular roller 51, the sliding ring 54 moves up and down along the axis of the bidirectional lead screw 53 through the cooperation and limiting of the guide roller 52. During the upward movement of the sliding ring 54, the support rod 55 and the welding head 56 will move in the same direction, and then the welding head 56 will weld the two pipe joints that have rotated to the vicinity.

[0031] It should be noted that, through the ratio of the pulley radius on the surfaces of the rotating roller 22 and the circular roller 51, and the cooperation of the bidirectional lead screw 53, the rotating roller 22 rotates one-quarter of a turn, causing the sliding ring 54 to drive the support rod 55 and the welding head 56 to move up or down by one arc, thus completing one welding operation at the quarter arc of the joint between the vertical and horizontal pipes.

[0032] like Figure 5 A limiting block 57 is fixedly installed on the upper front side of the welding head 56, and a rectangular groove 571 is opened on the right end of the limiting block 57.

[0033] The connection between the welding head 56 and the limiting block 57 is rotatably connected to the upper end of the support rod 55 by a fixing pin commonly used in the prior art. When the limiting block 57 is pushed, it causes the welding head 56 to swing.

[0034] like Figure 5 The swing assembly 6 includes a round rod 61 rotatably mounted on the top wall of the inner surface of the protective cover. The upper side of the outer surface of the round rod 61 is connected to the upper side of the outer surface of the bidirectional lead screw 53. A cam 62 is fixedly mounted on the lower end of the round rod 61. A limit plate 63 is provided at the lower end of the cam 62. Push rollers 64 are fixedly mounted on the left and right ends of the limit plate 63. The left side of the outer surface of the push roller 64 on the left side is slidably connected to the inner surface of the rectangular groove 571, and the outer surface of the push roller 64 on the right side is slidably connected to the right side wall of the inner surface of the protective cover.

[0035] The upper side of the outer surface of the aforementioned bidirectional lead screw 53 is connected to the second round rod 61 by a belt pulley transmission device in the prior art, and the radius of the belt pulley fixedly connected to the outer surface of the bidirectional lead screw 53 is larger than the radius of the belt pulley fixedly connected to the outer surface of the second round rod 61.

[0036] In addition, a limiting roller is provided on one side of the lower end of the aforementioned cam 62, which is slidably connected to the inner surface of the limiting plate 63.

[0037] The push roller 264 located on the left is made of elastic material.

[0038] During the welding process, the round rod 61 drives the cam 62 to rotate rapidly. Then, through the cooperation of the limiting rollers, the rotation of the round rod 61 and the cam 62 drives the limiting plate 63 and the two push rollers 64 to move back and forth. Since the radius of the cam 62 is small, the distance that the limiting plate 63 and the two push rollers 64 move back and forth is short. As the two push rollers 64 move back and forth, they continuously push the limiting block 57 to move back and forth through the inner surface of the rectangular groove 571. Through the connection between the welding head 56, the limiting block 57, and the support rod 55, the welding head 56 swings a small angle when the limiting block 57 moves back and forth.

[0039] Furthermore, during the welding process, the circular roller 51 drives the bidirectional lead screw 53 to rotate, thereby allowing the sliding ring 54, the support rod 55, and the welding head 56 to move up and down reciprocally. When the support rod 55 drives the welding head 56 to move up and down reciprocally, it will simultaneously drive the limiting block 57 to move up and down. As a result, the push roller 64 slides up and down relative to the inner surface of the rectangular groove 571, ensuring that during the welding process of the welding head 56 moving up and down to weld the joint of the two pipes, the push roller 64 on the left side always pushes the limiting block 57 back and forth, thereby causing the welding head 56 to swing left and right continuously, ensuring that the welding of the joint of the two pipes is completed.

[0040] like Figure 6 and Figure 7 The correction component 4 includes an L-shaped rod 41 fixedly installed on the outer surface of the fixing ring 11, and a wedge block 42 is fixedly installed at the lower end of the L-shaped rod 41.

[0041] Specifically, when the telescopic roller 12 drives the rotating plate 13 to descend and press against the upper end of the vertical pipe, the telescopic roller 12 descends, causing the fixing ring 11 to descend, which in turn causes the L-shaped rod 41 and the wedge block 42 to move downward simultaneously.

[0042] like Figure 7 The correction assembly 4 also includes a vertical plate 47 fixedly installed on the right end of the support rod 55. A limiting groove 471 is opened at the rear end of the vertical plate 47. An L-shaped roller 46 is slidably installed on the inner surface of the limiting groove 471. A spring 48 is fixedly installed on the front side of the outer surface of the L-shaped roller 46 and the rear end of the vertical plate 47. The rear right end of the L-shaped roller 46 is fixedly connected to the front end of the L-shaped roller 44.

[0043] like Figure 7 The correction assembly 4 also includes a telescopic rod 43 fixedly installed on the top wall of the inner surface of the protective cover. An L-shaped roller 44 is fixedly installed at the lower end of the telescopic rod 43. An elastic arc plate 45 is fixedly installed on the rear side of the left end of the L-shaped roller 44. A rolling ring 49 is fixedly installed on the front side of the outer surface of the L-shaped roller 44. The outer surface of the rolling ring 49 is in close contact with the inclined surface of the wedge block 42.

[0044] Specifically, when the two pipes are not butt welded, the front side of the outer surface of the L-shaped roller 46 is located on the side of the inner surface of the limiting groove 471 away from the spring 48, while the spring 48 is in a naturally extended state.

[0045] Furthermore, during the process of the rotating plate 13 being pushed down, the fixed ring 11 descends, causing the L-shaped rod 41 and the wedge block 42 to descend. The inclined surface of the wedge block 42 then presses against the outer surface of the rolling ring 49, causing the rolling ring 49, the first L-shaped roller 44, and the second L-shaped roller 46 to move as a whole closer to the vertical pipe. As the second L-shaped roller 46, the first L-shaped roller 44, and the rolling ring 49 move closer to the vertical pipe, the elastic arc plate 45 gradually presses against and abuts against the outer surface of the vertical pipe. At the same time, the front side of the outer surface of the second L-shaped roller 46 moves along the inner surface of the limiting groove 471 towards the spring 48. During the movement of the second L-shaped roller 46, the spring 48 is compressed simultaneously until the rotating plate 13 descends to a suitable height. At the same time, the elastic arc plate 45 presses against the outer surface of the vertical pipe, and the wedge block 42 descends to the point where its vertical part presses against the outer surface of the rolling ring 49.

[0046] Furthermore, by using two elastic arc plates 45 to press against the outer surface of the vertical pipe, and while the support rod 55 drives the welding head 56 to move up and down and swing to weld the joint of the two pipes, the up and down movement of the support rod 55 will be coordinated with the vertical plate 47, the L-shaped roller 2 46 and the L-shaped roller 1 44, so that the two elastic arc plates 45 move up and down synchronously with the welding head 56. This avoids the radial expansion and contraction deformation of the heat-affected zone of the weld due to thermal expansion and contraction. Through the coordination of the two elastic arc plates 45, a reverse extrusion force can be applied radially from the pipe, directly offsetting the radial deformation of the weld area and preventing the pipe from bending or shifting.

[0047] like Figure 8 and Figure 9 The blowing and suction assembly 3 includes a round rod 31 rotatably mounted on the upper rear side of the operating table 1. The lower side of the outer surface of the round rod 31 is connected to the outer surface of the rotating roller 22. A cam 32 is fixedly mounted on the upper end of the round rod 31. A limit plate 33 is provided on the upper end of the cam 32. Push rollers 34 are fixedly mounted on the middle of the left and right ends of the limit plate 33.

[0048] A limit rod is fixedly installed on one side of the upper end of the aforementioned cam 32, and the outer surface of the limit rod is slidably connected to the inner surface of the limit plate 33.

[0049] The outer surface of the aforementioned round rod 31 is connected to the outer surface of the rotating roller 22 by a belt pulley transmission device commonly used in the prior art. The radius of the belt pulley fixedly connected to the lower side of the outer surface of the rotating roller 22 is larger than the radius of the belt pulley fixedly connected to the outer surface of the round rod 31. During the operation of the rotating roller 22, which drives the fixed seat 21 and the two pipes to rotate, the round rod 31 rotates rapidly.

[0050] Next, during the rotation of the round rod 31, the cam 32 and the limiting rod rotate around the axis of the round rod 31, and through the sliding cooperation with the inner surface of the limiting plate 33, the limiting plate 33 and the two push rollers 34 move back and forth left and right.

[0051] like Figure 9 The blowing and suction assembly 3 also includes sliding plates 35 symmetrically slidably mounted on the rear side of the upper end of the operating table 1. The two sliding plates 35 are respectively fixedly connected to the push roller 34 on the same side at one end close to each other. Airbags 36 are fixedly mounted on the two sliding plates 35 at the opposite ends. Fixing plates 39 are fixedly mounted on the two airbags 36 at the opposite ends. The two fixing plates 39 are respectively fixedly connected to the upper end of the operating table 1. Hose 38 are fixedly mounted on the outer surface of the two airbags 36. Spray plates 37 are fixedly mounted on the side of the two hoses 38 away from the airbags 36.

[0052] The airbag 36 located on the left side is connected to an inert gas source in the prior art through an air tube, and a one-way air inlet valve is provided at the connection. At the same time, a one-way air outlet valve is provided at the connection between the airbag 36 located on the left side and the hose 38 on the same side, so that the inert gas enters the airbag 36 located on the left side through the air tube and then enters the hose 38 on the same side.

[0053] The airbag 36 on the right side is connected to the gas collection tank in the prior art through an air tube, and a one-way air outlet valve is provided between the airbag 36 on the right side and the air tube. At the same time, a one-way air inlet valve is provided at the connection between the airbag 36 on the right side and the hose 38 on the same side, so that the gas around the spray plate 37 on the right side enters the airbag 36 on the same side through the hose 38 on the right side, and then enters the gas collection tank in the prior art.

[0054] Each of the two spray plates 37 is equipped with several nozzles on the side near the pipe, and the hose 38 on the same side is connected to the spray plate 37 and the several nozzles on the same side.

[0055] like Figure 8 The upper end of the left spray plate 37 is fixedly connected to the upper surface of the telescopic roller 12, and the lower end of the right spray plate 37 is fixedly connected to the upper right side of the operating table 1.

[0056] Furthermore, when the rotating plate 13 is pushed against the top of the vertical pipe by the telescopic roller 12, the telescopic roller 12 simultaneously drives the spray plate 37 located on the left side to descend, so that the spray plate 37 located on the left side is above the left side of the horizontal pipe.

[0057] Furthermore, during the welding process at the joint of the two pipes, the cam 32 and the limit rod work together to drive the limit plate 33 and the two push rollers 34 to move back and forth. During the back and forth movement of the two push rollers 34, the two sliding plates 35 will move in the same direction.

[0058] When the limiting plate 33 and the two push rollers 34 are driven to move to the left, the sliding plate 35 on the left side is pushed to the left by the push roller 34 on the same side, and then, through cooperation with the fixed plate 39 on the same side, it will squeeze the airbag 36 on the left side. At the same time, the inert gas inside the airbag 36 on the left side is sprayed to the upper left side of the horizontal pipe through the hose 38 and spray plate 37 on the same side and several nozzles. At the same time, the sliding plate 35 on the right side is driven to move to the left by the push roller 34 on the same side, and works with the fixed plate 39 on the right side to stretch the airbag 36 on the right side. At this time, the air pressure inside the airbag 36 on the right side decreases, and air is continuously drawn in from the lower right side of the horizontal pipe through the hose 38 and spray plate 37 on the same side and several nozzles, so that the inert gas flows unidirectionally from the inside of the horizontal pipe.

[0059] Furthermore, when the limiting plate 33 and the two push rollers 34 move to the right, the airbag 36 on the left side is stretched, drawing inert gas into the airbag 36 on the left side, while the airbag 36 on the right side is compressed, and the gas inside the airbag 36 on the right side enters the gas collection tank through the air pipe.

[0060] This allows the inert gas to flow continuously in one direction during the welding process, continuously supplying argon gas to the weld pool area, isolating air, such as oxygen and nitrogen, from contact with the high-temperature weld pool, preventing the weld metal from oxidizing and nitriding, while recovering residual air, welding fumes and excess argon gas, preventing disorderly diffusion of the shielding gas, and ensuring a stable argon gas concentration in the weld pool area.

[0061] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A pipe connection device for fire protection engineering installation, comprising an operating platform (1) and a protective cover for protecting the internal structure, characterized in that: The upper middle part of the operating table (1) is provided with a fixing component (2) for fixing pipes to be welded together. The front side of the upper end of the operating table (1) is provided with a welding component (5) for welding two pipes together. The welding component (5) includes a welding head (56). The top wall of the inner surface of the protective cover on the right side of the welding component (5) is provided with a swing component (6) for driving the welding head (56) to swing. The upper end of the operating table (1) is symmetrically provided with a correction component (4) for assisting in correcting vertical pipes. The rear side of the upper end of the operating table (1) is provided with a blowing and suction component (3) for guiding gas flow.

2. A pipe connection device for fire protection engineering installation according to claim 1, characterized in that: A telescopic roller (12) is fixedly installed in the middle of the top wall of the inner surface of the protective cover. A rotating plate (13) is rotatably installed at the lower end of the telescopic roller (12). A fixing ring (11) is fixedly installed in the middle of the outer surface of the telescopic roller (12).

3. A pipe connection device for fire protection engineering installation according to claim 2, characterized in that: A rotating roller (22) is rotatably installed in the middle of the upper end of the operating table (1), and a fixing seat (21) for fixing a horizontal pipe is fixedly installed on the upper end of the rotating roller (22).

4. A pipe connection device for fire protection engineering installation according to claim 3, characterized in that: The welding assembly (5) includes a circular roller (51) rotatably mounted on the front side of the upper end of the operating table (1). The lower side of the outer surface of the circular roller (51) is connected to the lower side of the outer surface of the rotating roller (22). A bidirectional lead screw (53) is fixedly mounted on the upper end of the circular roller (51). A sliding ring (54) is provided on the outer surface of the bidirectional lead screw (53). A support rod (55) is fixedly mounted on the rear side of the outer surface of the sliding ring (54). The upper rear side of the support rod (55) is movably mounted to the welding head (56) of the two pipes.

5. A pipe connection device for fire protection engineering installation according to claim 4, characterized in that: The welding assembly (5) also includes a guide roller (52) fixedly installed on the front side of the upper end of the operating table (1). The outer surface of the guide roller (52) is slidably connected to the sliding ring (54). A limit block (57) is fixedly installed on the upper side of the front end of the welding head (56). A rectangular groove (571) is opened at the right end of the limit block (57).

6. A pipe connection device for fire protection engineering installation according to claim 5, characterized in that: The swing assembly (6) includes a round rod (61) rotatably mounted on the top wall of the inner surface of the protective cover. The upper side of the outer surface of the round rod (61) is connected to the upper side of the outer surface of the bidirectional lead screw (53). A cam (62) is fixedly mounted on the lower end of the round rod (61). A limit plate (63) is provided on the lower end of the cam (62). Push rollers (64) are fixedly mounted on the left and right ends of the limit plate (63). The left side of the outer surface of the push roller (64) located on the left side is slidably connected to the inner surface of the rectangular groove (571). The outer surface of the push roller (64) located on the right side is slidably connected to the right side wall of the inner surface of the protective cover.

7. A pipe connection device for fire protection engineering installation according to claim 4, characterized in that: The correction component (4) includes an L-shaped rod (41) fixedly installed on the outer surface of the fixing ring (11). A wedge block (42) is fixedly installed at the lower end of the L-shaped rod (41). The correction component (4) also includes a vertical plate (47) fixedly installed on the right end of the support rod (55). A limiting groove (471) is opened at the rear end of the vertical plate (47). An L-shaped roller (46) is slidably installed on the inner surface of the limiting groove (471). A spring (48) is fixedly installed on the front side of the outer surface of the L-shaped roller (46) and the rear end of the vertical plate (47). The rear right end of the L-shaped roller (46) is fixedly connected to the front end of the L-shaped roller (44).

8. A pipe connection device for fire protection engineering installation according to claim 7, characterized in that: The correction component (4) also includes a telescopic rod (43) fixedly installed on the top wall of the inner surface of the protective cover. An L-shaped roller (44) is fixedly installed at the lower end of the telescopic rod (43). An elastic arc plate (45) is fixedly installed on the rear side of the left end of the L-shaped roller (44). A rolling ring (49) is fixedly installed on the front side of the outer surface of the L-shaped roller (44). The outer surface of the rolling ring (49) is in close contact with the inclined surface of the wedge block (42).

9. A pipe connection device for fire protection engineering installation according to claim 3, characterized in that: The blowing and suction assembly (3) includes a round rod (31) rotatably mounted on the upper rear side of the operating table (1). The lower side of the outer surface of the round rod (31) is connected to the outer surface of the rotating roller (22). A cam (32) is fixedly mounted on the upper end of the round rod (31). A limit plate (33) is provided on the upper end of the cam (32). A push roller (34) is fixedly mounted on the middle of the left and right ends of the limit plate (33).

10. A pipe connection device for fire protection engineering installation according to claim 9, characterized in that: The blowing and suction assembly (3) also includes sliding plates (35) symmetrically slidably installed on the upper rear side of the operating table (1). The two sliding plates (35) are respectively fixedly connected to the push roller (34) on the same side at one end close to each other. Airbags (36) are fixedly installed at the two sliding plates (35) at one end far from each other. Fixing plates (39) are fixedly installed at the two airbags (36) at one end far from each other. The two fixing plates (39) are respectively fixedly connected to the upper end of the operating table (1). Hose (38) is fixedly installed on the outer surface of the two airbags (36). Spray plates (37) are fixedly installed on the side of the two hoses (38) away from the airbags (36). The upper end of the spray plate (37) on the left side is fixedly connected to the upper side of the outer surface of the telescopic roller (12). The lower end of the spray plate (37) on the right side is fixedly connected to the right side of the upper end of the operating table (1).

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