Welding device for fire engineering

Abstract

The utility model relates to the technical field of welding, and discloses a welding device for fire engineering, which comprises a fixed seat, a fixed limiting disc is arranged in the middle of the top of the fixed seat, the left side wall of the fixed limiting disc is rotatably connected with a first gear disc, and the right side wall of the fixed limiting disc is rotatably connected with a second gear disc. The right side wall of the second gear disc is connected with a connecting rotary disc, and the front side walls of the first gear disc and the second gear disc are engaged with ratchet wheels correspondingly. According to the utility model, the first gear disc or the second gear disc can be singly driven to rotate, so that the capacitive welding gun or the cooling mechanism does circular motion, the capacitive welding gun can be ensured to carry out omnibearing and uniform welding operation around a welding point, and the welding point of a welded pipeline and a welded flange can be cooled through the cooling mechanism; the welding quality is effectively improved, and deformation of the flange plate and the fire-fighting pipeline after welding caused by overlarge local thermal stress is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of welding, in particular to a welding device for fire protection engineering. Background Art

[0002] With the increasing awareness of fire safety and the continuous improvement of relevant regulations, the quality standards of fire protection engineering are becoming increasingly higher. Regulatory authorities have imposed stricter requirements on the welding processes and welding equipment used in fire protection engineering. For example, the non-destructive testing standards for welds have been raised, and welding equipment is required to better ensure the internal quality of welds and reduce defects. This has prompted the development of specialized welding equipment that better meets the high standards of fire protection engineering and meets fire safety requirements.

[0003] However, the existing technology has the following shortcomings: some traditional welding devices may only be able to perform welding actions in a single direction or in a relatively limited manner, and are unable to perform all-round and uniform welding operations on the welding parts, resulting in low welding quality and prone to welding defects. For example, when welding fire-fighting flanges and fire-fighting pipes, the integrity and uniformity of the welding cannot be well guaranteed. Some existing welding devices may lack effective post-welding cooling treatment measures. During the welding process, local heat is applied to the welding parts to generate thermal stress, causing the welded parts (such as pipes and flanges) and the surrounding materials to easily deform due to different expansion degrees, affecting the quality and stability of the welded products. Therefore, those skilled in the art provide a welding device for fire-fighting engineering to solve the above-mentioned problems. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a welding device for fire protection engineering.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: A welding device for fire protection engineering, comprising a movable seat, a through slot is opened in the middle of the top of the movable seat, a fixed limit plate is installed at the middle position of the top of the movable seat, the left wall of the fixed limit plate is rotatably connected to the first gear plate, the right wall of the fixed limit plate is rotatably connected to the second gear plate, the right wall of the second gear plate is connected to the connecting turntable, the front side walls of the first gear plate and the second gear plate are respectively meshed with ratchets, the inner ratchet teeth of the two ratchets are facing opposite directions, the middle position of the inner side walls of the two ratchets are each provided with an inner turntable, the right side of the inner turntable is rotatably connected with a pawl, the two pawls respectively cooperate with the inner ratchet teeth of the two ratchets, a driving rod is connected through the middle position of the two side walls of the two inner turntables, and the two side walls of the driving rod are provided with mounting plates, the two mounting plates are respectively mounted on the top of the movable seat near the two sides, and the right side wall of the mounting plate near the right side is installed with a driving motor, and the output end of the driving motor is connected to the right end of the driving rod.

[0006] Furthermore, the driving motor drives the driving rod to rotate, and through the cooperation of the inner turntable, the pawl and the ratchet, it can drive the first gear plate or the second gear plate to rotate, so that the capacitive welding gun or the cooling mechanism performs a circular motion, which can ensure that the capacitive welding gun performs all-round and uniform welding operations around the welding point, and cools the welding points of the welded pipes and flanges through the cooling mechanism. Compared with some traditional welding devices that may only be able to perform welding actions in a single direction or more limited directions, it can more accurately weld the welding parts of the fire-fighting flange and the fire-fighting pipe, effectively improve the welding quality, reduce welding defects, and avoid excessive local thermal stress, which may cause deformation of the welded flange and the fire-fighting pipe.

[0007] Preferably, electric cylinders are installed in the middle of the inner wall of the first gear plate, and the four electric cylinders are distributed in a rectangular array. Elastic diaphragms are installed at the output ends of the four electric cylinders, and the inner cavity of each elastic diaphragm is injected with cooling oil, and the inner wall of the elastic diaphragm is provided with pores for providing cooling oil circulation.

[0008] Furthermore, the welding points are cooled by cooling oil injected into the four elastic diaphragms to prevent the pipes and flanges from generating thermal stress due to local heating. Due to the different expansion degrees of the surrounding materials, the pipes and flanges are deformed under the continuous action of thermal stress.

[0009] Preferably, a capacitive welding gun is installed at a middle position on the top of the inner side wall of the connecting turntable, and the capacitive welding gun moves in a circular motion following the connecting turntable.

[0010] Furthermore, when the output end of the driving motor is driven by an external controller to rotate counterclockwise, the driving rod rotates synchronously. At this time, the inner turntable on the right side acts on the pawl, and the pawl acts on the meshing end of the inner wall of the ratchet, thereby causing the ratchet on the right side to rotate. However, during the counterclockwise rotation of the inner turntable on the left side, the smooth surface of the pawl fails to engage with the inner wall of the ratchet. At this time, the ratchet on the left side remains stationary, while the two inner turntables rotate, thereby driving the second gear plate to rotate and causing the capacitive welding gun to perform a circular motion, thereby completing the welding of the flange and the fire pipe.

[0011] Preferably, fixed seats are provided on both sides of the movable seat, and a drive box is installed on the right side wall of the fixed seat on the right side, and a motor is installed inside the drive box. The output end of the motor in the drive box is connected to a screw rod, and the screw rod is threadedly connected to the middle position of the movable seat and the other end is connected to the right side wall of the fixed seat on the left side through a bearing sleeve.

[0012] Furthermore, the drive box is controlled by an external controller so that the output end of the drive box acts on the two screw rods to rotate, so that the movable seat moves synchronously toward or away from the two side walls of the movable seat.

[0013] Preferably, a flange fixing claw clamp is installed in the middle of the top of the movable seat on the right side, and a pipe fixing claw clamp is installed in the middle of the top of the movable seat on the left side.

[0014] Furthermore, the fire-fighting flange that needs to be welded and the corresponding fire-fighting pipe to be welded are clamped and fixed by the flange fixing claw clamp and the pipe fixing claw clamp respectively. The flange fixing claw clamp and the pipe fixing claw clamp act on the four claws through their transmission mechanism to move synchronously toward the center according to the size of the flange and the fire-fighting pipe, thereby effectively clamping them.

[0015] The utility model has the following beneficial effects:

[0016] 1. In the present invention, after welding is completed, when the pipe and the flange are moved to the middle position inside the first gear plate, the electric cylinder pushes the elastic diaphragm to slightly fit with the welding point, and the inner cavity of the elastic diaphragm is injected with cooling oil. The first gear plate is driven to rotate by the reverse rotation of the driving motor. The welding point is cooled by the cooling oil without rotating the pipe and the flange. This effectively avoids the thermal stress generated by local heating of the pipe and the flange, and thus prevents the problem of deformation caused by different expansion degrees from the surrounding materials due to thermal stress. Some existing welding devices may lack effective post-weld cooling treatment measures, which are prone to undesirable conditions such as deformation of welded parts. The present device has obvious advantages in this regard and helps to improve the integrity and uniformity of the product after welding.

[0017] 2. In the present invention, the driving motor drives the driving rod to rotate, and through the cooperation of the inner turntable, the pawl and the ratchet, it can drive the second gear plate to rotate, so that the capacitive welding gun performs a circular motion. This design ensures that the welding gun can perform all-round and uniform welding operations around the welding point. Compared with some traditional welding devices that may only be able to perform single-directional or relatively limited welding operations, it can more accurately weld the welding parts of fire-fighting flanges and fire-fighting pipes, effectively improving welding quality and reducing welding defects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a three-dimensional schematic diagram of the utility model;

[0020] Figure 3 This is a rear perspective schematic diagram of the present utility model;

[0021] Figure 4 is a schematic structural diagram of a ratchet assembly;

[0022] Figure 5 for Figure 1 Enlarged schematic diagram of point A in the middle.

[0023] Legend:

[0024] 1. Movable seat; 2. Fixed seat; 3. Flange fixing claw clamp; 4. Pipe fixing claw clamp; 5. Through slot; 6. Mounting plate; 7. Ratchet; 8. Pawl; 9. Drive rod; 10. First gear plate; 11. Second gear plate; 12. Fixed limit plate; 13. Connecting turntable; 14. Capacitive welding gun; 15. Drive motor; 16. Drive box; 17. Screw; 18. Inner turntable; 19. Electric cylinder; 20. Elastic diaphragm. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Reference Figure 1 - Figure 4, a welding device for fire protection engineering includes a movable seat 1, a through slot 5 is opened in the middle of the top of the movable seat 1, a fixed limit plate 12 is installed in the middle position of the top of the movable seat 1, the left side wall of the fixed limit plate 12 is rotatably connected to the first gear plate 10, the right side wall of the fixed limit plate 12 is rotatably connected to the second gear plate 11, and the right side wall of the second gear plate 11 is connected to the connecting turntable 13, the front side walls of the first gear plate 10 and the second gear plate 11 are respectively meshed with ratchets 7, the inner ratchet 7 teeth of the two ratchet wheels 7 face oppositely, an inner turntable 18 is provided at the middle position of the inner side walls of the two ratchet wheels 7, the right side of the inner turntable 18 is rotatably connected with a pawl 8, the two pawls 8 respectively cooperate with the inner ratchet 7 teeth of the two ratchets 7, the middle position of the two side walls of the two inner turntables 18 is connected with a driving rod 9, and the two side walls of the driving rod 9 are provided with mounting plates 6, and the two mounting plates 6 are respectively mounted on the movable seat 1 A drive motor 15 is installed on the right side wall of the mounting plate 6 on the right side, near both sides of the top. The output end of the drive motor 15 is connected to the right end of the drive rod 9. The drive motor 15 drives the drive rod 9 to rotate. Through the cooperation of the inner turntable 18, the pawl 8 and the ratchet 7, the first gear plate 10 or the second gear plate 11 can be driven to rotate, so that the capacitive welding gun 14 or the cooling mechanism performs a circular motion, which can ensure that the capacitive welding gun 14 performs all-round and uniform welding operations around the welding points, and cools the welding points of the welded pipes and flanges through the cooling mechanism. Compared with some traditional welding devices that may only be able to perform welding actions in a single direction or more limited directions, it can more accurately weld the welding parts of the fire-fighting flange and the fire-fighting pipe, effectively improve the welding quality, reduce welding defects, and avoid excessive local thermal stress, which leads to deformation of the welded flange and the fire-fighting pipe.

[0027] Electric cylinders 19 are installed in the middle of the inner wall of the first gear plate 10. The four electric cylinders 19 are distributed in a rectangular array. Elastic diaphragms 20 are installed at the output ends of the four electric cylinders 19. The inner cavity of each elastic diaphragm 20 is injected with cooling oil, and the inner wall of the elastic diaphragm 20 is provided with pores for providing cooling oil circulation. The cooling oil injected into the interior of the four elastic diaphragms 20 cools the welding points to prevent the pipes and flanges from generating thermal stress due to local heating. The expansion degree of the pipes and flanges is different from that of the surrounding materials. Under the continuous action of thermal stress, the pipes and flanges are deformed.

[0028] A capacitive welding gun 14 is installed at the middle position of the top of the inner wall of the connecting turntable 13 through a lifting mechanism. The lifting mechanism can be a structure such as an electric cylinder or an oil cylinder that can drive the capacitive welding gun 14 to move linearly. The capacitive welding gun 14 follows the connecting turntable 13 to make a circular motion. When the output end of the drive motor 15 is driven by an external controller to rotate counterclockwise, the drive rod 9 rotates synchronously. At this time, the inner turntable 18 on the right side acts on the pawl 8, and the pawl 8 acts on the meshing end of the inner wall of the ratchet 7, thereby causing the ratchet 7 on the right side to rotate. However, during the counterclockwise rotation of the inner turntable 18 on the left side, due to the smoothness of the pawl 8, The surface fails to engage with the inner wall of the ratchet 7. At this time, the ratchet 7 on the left side remains stationary, while the two inner turntables 18 rotate, thereby driving the second gear plate 11 to rotate so that the capacitive welding gun 14 performs a circular motion, thereby completing the welding of the flange and the fire protection pipe. The capacitive welding gun 14 is a type of welding gun that first stores electrical energy in a capacitor. When the welding operation starts, the capacitor discharges quickly, and the released electrical energy is converted into the high current and low voltage form required for welding through components such as a transformer, thereby generating enough heat to complete the welding. The welding work can be completed without connecting wires, avoiding the problem of wire entanglement caused by the rotation of the welding gun.

[0029] The movable seat 1 is provided with a fixed seat 2 on both sides, and a drive box 16 is installed on the right side wall of the fixed seat 2 on the right side. A motor is installed in the drive box 16, and the output end of the motor in the drive box 16 is connected to a screw rod 17, which is threadedly connected to the middle position of the movable seat 1 and the other end is connected to the right side wall of the fixed seat 2 on the left side through a bearing sleeve. The drive box 16 is controlled by an external controller so that the output end of the drive box 16 acts on the screw rod 17 to rotate. According to the rotation direction of the screw rod 17, the movable seat 1 moves toward the two fixed seats 2. A flange fixing claw clamp 3 is installed in the middle of the top of the fixed seat 2 on the right side, and a pipe fixing claw clamp 4 is installed in the middle of the top of the fixed seat 2 on the left side. The fire-fighting flange to be welded and the corresponding fire-fighting pipe to be welded are clamped and fixed by the flange fixing claw clamp 3 and the pipe fixing claw clamp 4 respectively. The flange fixing claw clamp 3 and the pipe fixing claw clamp 4 act on the four clamps through their transmission mechanism and move synchronously toward the center according to the size of the flange and the fire-fighting pipe, thereby effectively clamping them.

[0030] Working principle: First, the fire-fighting flange to be welded and the corresponding fire-fighting pipe to be welded are clamped and fixed by the flange fixing claw clamp 3 and the pipe fixing claw clamp 4 respectively. The flange fixing claw clamp 3 and the pipe fixing claw clamp 4 act on the four claws through their transmission mechanism to move synchronously toward the center according to the size of the flange and the fire-fighting pipe, thereby effectively clamping them.

[0031] After clamping is completed, the two drive boxes 16 are controlled separately by the external controller, so that the output ends of the two drive boxes 16 act on the two screw rods 17 to rotate respectively, so that the two fixed seats 2 are synchronously approached to the two side walls of the movable seat 1. When the welding point of the flange and the pipeline is located below the capacitive welding gun 14, the output end of the drive motor 15 is driven by the external controller to rotate counterclockwise, and the drive rod 9 rotates synchronously. At this time, the inner turntable 18 on the right side acts on the pawl 8, and the pawl 8 acts on the meshing end of the inner wall of the ratchet 7, thereby rotating the ratchet 7 on the right side. However, during the counterclockwise rotation of the inner turntable 18 on the left side, the smooth surface of the pawl 8 fails to engage with the inner wall of the ratchet 7. At this time, the ratchet 7 on the left side remains stationary, and the two inner turntables 18 rotate, thereby driving the second gear disk 11 to rotate so that the capacitive welding gun 14 performs a circular motion, thereby completing the welding of the flange and the fire-fighting pipe.

[0032] When welding is completed, the flange fixing claw clamp 3 no longer clamps the flange, and the driving box 16 acts on the screw rod 17, and the movable seat 1 moves toward the fixed seat 2 end on the left side until it moves to the welding point of the flange and the pipe. The movable ends of the four electric cylinders 19 act on the four elastic diaphragms 20 respectively to move toward the welding point of the pipe and the flange until they are fitted. At this time, the driving end of the driving motor 15 rotates clockwise, causing the driving rod 9 to rotate synchronously. At this time, the inner turntable 18 on the left side acts on the pawl 8, and the pawl 8 acts on the meshing end of the inner wall of the ratchet 7, thereby causing the ratchet 7 on the left side to rotate. During the counterclockwise rotation of the inner turntable 18 on the right, the smooth surface of the pawl 8 fails to engage with the inner wall of the ratchet 7. At this time, the ratchet 7 on the right side remains stationary, while the two inner turntables 18 rotate, thereby driving the first gear plate 10 to rotate. Since the four elastic diaphragms 20 are in a micro-fitting state with the welding points, the fire-fighting pipe and the flange will not rotate, and the welding points are cooled by the cooling oil injected into the interior of the four elastic diaphragms 20 to avoid thermal stress in the pipe and the flange due to local heating. The expansion degree is different from that of the surrounding materials. Under the continuous action of thermal stress, the pipe and the flange are deformed.

[0033] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A welding device for fire protection engineering, characterized in that: The invention comprises a movable seat (1), a through slot (5) is provided in the middle of the top of the movable seat (1), a fixed limiting plate (12) is installed in the middle of the top of the movable seat (1), the left side wall of the fixed limiting plate (12) is rotatably connected to a first gear plate (10), the right side wall of the fixed limiting plate (12) is rotatably connected to a second gear plate (11), the right side wall of the second gear plate (11) is connected to a connecting rotating plate (13), the front side walls of the first gear plate (10) and the second gear plate (11) are respectively meshed with ratchets (7), the inner ratchet teeth of the two ratchets (7) face opposite directions, and the two ratchets (7) are rotated. An inner turntable (18) is provided at the middle position of the inner side wall, and a ratchet (8) is rotatably connected to the right side of the inner turntable (18). The two ratchet pawls (8) respectively cooperate with the inner ratchet teeth of the two ratchets (7). A driving rod (9) is connected through the middle position of the two side walls of the two inner turntables (18). The two side walls of the driving rod (9) are provided with mounting plates (6). The two mounting plates (6) are respectively installed on the top of the movable seat (1) at the two sides. A driving motor (15) is installed on the right side wall of the mounting plate (6) on the right side, and the output end of the driving motor (15) is connected to the right end of the driving rod (9).

2. A welding device for fire protection engineering according to claim 1, characterized in that: An electric cylinder (19) is installed at a middle position of the inner wall of the first gear plate (10), and the four electric cylinders (19) are distributed in a rectangular array. The output ends of the four electric cylinders (19) are installed with an elastic diaphragm (20), and the inner cavity of each elastic diaphragm (20) is injected with cooling oil, and the inner wall of the elastic diaphragm (20) is provided with a hole for providing cooling oil circulation.

3. A welding device for fire protection engineering according to claim 1, characterized in that: A capacitive welding gun (14) is installed at the middle position of the top of the inner side wall of the connecting turntable (13) via a lifting mechanism.

4. A welding device for fire protection engineering according to claim 1, characterized in that: Fixed seats (2) are provided on both sides of the movable seat (1), a drive box (16) is installed on the right side wall of the fixed seat (2) on the right side, a motor is installed inside the drive box (16), the output end of the motor in the drive box (16) is connected to a screw rod (17), the screw rod (17) is threadedly connected to the middle position of the movable seat (1) and the other end is connected to the right side wall of the fixed seat (2) on the left side through a bearing sleeve.

5. A welding device for fire protection engineering according to claim 4, characterized in that: A flange fixing claw clamp (3) is installed in the middle of the top of the fixing seat (2) on the right side, and a pipe fixing claw clamp (4) is installed in the middle of the top of the fixing seat (2) on the left side.

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