Transformer oil tank shell welding protection device

Abstract

The utility model discloses a transformer oil tank shell welding protection device, which belongs to the technical field of welding devices and is characterized by comprising a supporting table, a working plate is fixedly connected to the top of the supporting table, a threaded rod is rotatably connected to the rear side of the working plate, and a gear motor is fixedly connected to the left side of the top of the supporting table. The output end of the gear motor penetrates through the working plate and is fixedly connected to the left side of a threaded rod, the surface of the threaded rod is in threaded connection with a base, the top of the base is fixedly connected with a mechanical arm, the bottom of the mechanical arm is fixedly connected with a welding head, and the top of the working plate is fixedly connected with a clamping mechanism. The surface of the clamping mechanism is fixedly connected with a dust collection mechanism, the clamping mechanism drives a lead screw to rotate through a servo motor, so that a clamping plate can move along the lead screw and a limiting rod, the transformer oil tank shell is clamped and loosened, and adjustment can be conducted according to the size of the oil tank shell.

Description

Technical Field

[0001] This utility model relates to the field of welding equipment technology, and in particular to a welding protection device for transformer oil tank shell. Background Technology

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. It plays an extremely important role in the power system, undertaking key functions such as voltage transformation, current transformation, impedance transformation, isolation, and voltage stabilization.

[0003] To address the aforementioned issues, existing patents have provided solutions. However, existing welding devices lack a structure for dust extraction and purification during the welding of transformer tank casings. This results in the generation of large amounts of fumes and harmful gases, such as carbon monoxide, nitrogen oxides, and metal oxides, during welding. Long-term exposure to these fumes and harmful gases can cause serious damage to the respiratory and cardiovascular systems of operators, leading to diseases such as pneumoconiosis and respiratory illnesses, thus causing harm to the operators' health.

[0004] Therefore, a welding protection device for transformer tank casing is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide a protective device for welding transformer tank shells, which can solve the problem that existing welding devices lack a structure for dust extraction and purification during the welding of transformer tank shells. This results in the generation of a large amount of fumes and harmful gases, such as carbon monoxide, nitrogen oxides, and metal oxides, during welding. Long-term exposure to these fumes and harmful gases can cause serious damage to the respiratory and cardiovascular systems of operators, leading to diseases such as pneumoconiosis and respiratory diseases, thus causing health problems for operators.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a welding protection device for transformer tank shell, comprising a support platform, a working plate fixedly connected to the top of the support platform, a threaded rod rotatably connected to the rear side of the working plate, a reduction motor fixedly connected to the left side of the top of the support platform, the output end of the reduction motor passing through the working plate and fixedly connected to the left side of the threaded rod, a base threadedly connected to the surface of the threaded rod, a robotic arm fixedly connected to the top of the base, a welding head fixedly connected to the bottom of the robotic arm, a clamping mechanism fixedly connected to the top of the working plate, and a dust extraction mechanism fixedly connected to the surface of the clamping mechanism;

[0007] The vacuuming mechanism includes a connecting rod, two vacuum plates, two diversion pipes, two connecting hoses, two vacuum pumps, two dust exhaust pipes, a purification box, a purification container, two dust collection boxes, a filter box, activated carbon granules, a filter non-woven fabric, and an exhaust port. The connecting rod is fixedly connected to both sides of the clamping mechanism surface. The vacuum plates are fixedly connected to the top of the connecting rod. The diversion pipes are fixedly connected to the inner side of the vacuum plates. The connecting hoses are fixedly connected to the side of the diversion pipes away from the vacuum plates. The vacuum pumps are fixedly connected to both sides of the top of the support platform. The dust exhaust pipe is fixedly connected to the rear side of the dust pump. The purification box is fixedly connected to the bottom of the support platform. The purification container is slidably connected to the inside of the purification box. The bottom of the dust exhaust pipe passes through the support platform and is fixedly connected to both sides of the purification box. The dust collection box is fixedly connected to both sides of the top of the purification box. The filter box is fixedly connected to the top of the purification box. The activated carbon granules are placed inside the filter box. The filter non-woven fabric is fixedly connected to the side of the dust collection box near the filter box. The exhaust vents are respectively opened on the rear side of the filter box and the rear side of the purification box.

[0008] Preferably, the clamping mechanism includes a limiting rod, a lead screw, a limiting block, a connecting shaft, a servo motor, and a clamping plate, with the limiting rod fixedly connected to the rear side of the top of the work plate.

[0009] Preferably, the limiting block is fixedly connected to the front side of the top of the working plate, the connecting shaft is rotatably connected to the inner side of the limiting block, the lead screw is fixedly connected to both sides of the connecting shaft, the servo motor is fixedly connected to the left side of the top of the support platform, and the output end of the right side of the servo motor passes through the working plate and is fixedly connected to the left side of the left lead screw.

[0010] Preferably, the front side of the left clamping plate is threadedly connected to the surface of the left lead screw, and the rear side of the left clamping plate is slidably connected to the surface of the limiting rod. The front side of the right clamping plate is threadedly connected to the surface of the right lead screw, and the rear side of the right clamping plate is slidably connected to the surface of the limiting rod. The surfaces of the clamping plates are fixedly connected to the bottom of the connecting rod.

[0011] Preferably, the thread of the left lead screw is clockwise and the thread of the right lead screw is counterclockwise, and the surface of the lead screw is coated with lubricant.

[0012] Preferably, a dust filter is fixedly connected to the inner side of the exhaust vent, and the surface of the dust filter is coated with an anti-corrosion coating.

[0013] Preferably, a sealing ring is fixedly connected to the side of the diversion pipe near the dust collection plate, and the surface of the sealing ring is coated with an anti-corrosion coating.

[0014] Preferably, the bottom of the servo motor is fixedly connected to a connecting seat, and the bottom of the connecting seat is fixedly connected to the top of the support platform.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. The clamping mechanism of this application drives the lead screw to rotate via a servo motor, enabling the clamping plate to move along the lead screw and the limit rod, thereby clamping and releasing the transformer tank shell. It can be adjusted according to the size of the tank shell to ensure that the tank is firmly fixed in a suitable position during the welding process, effectively avoiding problems such as welding position deviation caused by tank displacement during welding, and improving welding quality.

[0017] 2. The combined design of the dust collection plate, diversion pipe, and connecting hose of the dust collection mechanism in this application can form an effective dust collection range near the welding area, timely capturing the fumes and harmful gases generated during the welding process. The dust pump provides powerful suction to ensure that the fumes and harmful gases are quickly drawn into the purification system, improving dust collection efficiency. The dust collection box can first collect larger particles of fumes, and the filter non-woven fabric can further filter smaller particles. Activated carbon particles can adsorb harmful gases and odors, achieving deep purification treatment of welding fumes and harmful gases, effectively reducing environmental pollution and harm to the health of operators. Attached Figure Description

[0018] Figure 1 This is an overall structural diagram of the transformer tank outer shell welding protection device of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the dust collection plate of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the filter box of this utility model;

[0021] Figure 4 This is an overall structural diagram of the clamping mechanism of this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the dust filter of this utility model.

[0023] In the diagram, 1. Support platform; 2. Working plate; 3. Threaded rod; 4. Gear motor; 5. Base; 6. Robotic arm; 7. Welding head; 8. Clamping mechanism; 801. Limiting rod; 802. Lead screw; 803. Limiting block; 804. Connecting shaft; 805. Servo motor; 806. Clamping plate; 9. Dust collection mechanism; 901. Connecting rod; 902. Dust collection plate; 903. Diverter pipe; 904. Connecting hose; 905. Dust pump; 906. Dust exhaust pipe; 907. Purification box; 908. Purification container; 909. Dust collection box; 910. Filter box; 911. Activated carbon granules; 912. Filter non-woven fabric; 913. Exhaust vent; 10. Dustproof filter screen; 11. Sealing ring; 12. Connecting seat. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-5 The present invention provides the following technical solution:

[0026] A welding protection device for transformer tank casing includes a support platform 1, a working plate 2 fixedly connected to the top of the support platform 1, a threaded rod 3 rotatably connected to the rear side of the working plate 2, a reduction motor 4 fixedly connected to the left side of the top of the support platform 1, the output end of the reduction motor 4 passing through the working plate 2 and fixedly connected to the left side of the threaded rod 3, a base 5 threadedly connected to the surface of the threaded rod 3, a robotic arm 6 fixedly connected to the top of the base 5, a welding head 7 fixedly connected to the bottom of the robotic arm 6, a clamping mechanism 8 fixedly connected to the top of the working plate 2, and a dust extraction mechanism 9 fixedly connected to the surface of the clamping mechanism 8.

[0027] The vacuuming mechanism 9 includes a connecting rod 901, two vacuum plates 902, two diversion pipes 903, two connecting hoses 904, two vacuum pumps 905, two exhaust pipes 906, a purification box 907, a purification container 908, two dust collection boxes 909, a filter box 910, activated carbon granules 911, a filter non-woven fabric 912, and an exhaust port 913. The connecting rod 901 is fixedly connected to both sides of the surface of the clamping mechanism 8. The vacuum plates 902 are fixedly connected to the top of the connecting rod 901. The diversion pipes 903 are fixedly connected to the inner side of the vacuum plates 902. The connecting hoses 904 are fixedly connected to the side of the diversion pipes 903 away from the vacuum plates 902. The vacuum pumps 905 are fixedly connected to the support platform 1. On both sides of the top, the dust exhaust pipe 906 is fixedly connected to the rear side of the vacuum pump 905, the purification box 907 is fixedly connected to the bottom of the support platform 1, the purification box 908 is slidably connected to the inside of the purification box 907, the bottom of the dust exhaust pipe 906 passes through the support platform 1 and is fixedly connected to both sides of the purification box 907, the dust collection box 909 is fixedly connected to both sides of the top of the purification box 908, the filter box 910 is fixedly connected to the top of the purification box 908, the activated carbon granules 911 are placed inside the filter box 910, the filter non-woven fabric 912 is fixedly connected to the side of the dust collection box 909 near the filter box 910, and the exhaust port 913 is opened on the rear side of the filter box 910 and the rear side of the purification box 907 respectively.

[0028] In this embodiment: the support platform 1 supports and limits the working plate 2, the geared motor 4, the clamping mechanism 8, and the dust collection mechanism 9. The working plate 2 provides an installation position for the threaded rod 3, the geared motor 4, and the clamping mechanism 8, serving as a load-bearing and fixing unit. Furthermore, its flat surface provides a stable working plane for the placement and welding of the transformer tank shell. The threaded rod 3, through its threaded connection to the base 5, rotates under the drive of the geared motor 4, enabling the base 5 to move horizontally. This allows the robotic arm 6 and the welding head 7 to reach different welding positions, meeting the welding needs of different parts of the transformer tank shell and improving the flexibility and adaptability of the welding process. The geared motor 4 provides the power for the rotation of the threaded rod 3. The force, and through the deceleration function, can reduce the output speed while increasing the output torque. This makes the movement of the base 5 more stable and precise, facilitating the control of the position of the welding head 7 and ensuring the accuracy of the welding operation. Driven by the threaded rod 3, the base 5 can move on the work plate 2, allowing the robotic arm 6 and the welding head 7 to reach different welding positions. The robotic arm 6 has flexible degrees of freedom of movement, enabling precise control of the position and posture of the welding head 7. According to the requirements of the welding process, the welding head 7 can be accurately moved to various welding parts of the tank shell for high-quality welding operations, improving welding efficiency and quality while reducing the labor intensity of manual operation. The welding head 7 is the component that realizes the welding operation and can generate high temperature. The welding material is melted to connect the various components of the transformer tank casing. Connecting rod 901 connects the dust-collecting plate 902 and the clamping mechanism 8, stably installing the dust-collecting plate 902 near the welding area. This allows it to effectively capture fumes and harmful gases generated during welding without affecting the clamping mechanism 8 or the normal welding operation. The large suction port of the dust-collecting plate 902 creates a large suction range near the welding area, promptly capturing fumes and harmful gases generated during welding and improving suction efficiency. Diverter pipe 903 diverts the fumes and harmful gases collected by the dust-collecting plate 902, ensuring they enter the connecting hose 904 evenly, guaranteeing the stability of the suction airflow and improving the suction effect. The flexible hose 904 connects the diversion pipe 903 and the vacuum pump 905. It possesses a certain degree of flexibility, adapting to changes in the relative position between the suction plate 902 and the vacuum pump 905, ensuring smooth airflow. The vacuum pump 905 provides powerful suction for the vacuum system, quickly drawing fumes and harmful gases generated in the welding area into the inner side of the purification chamber 907. The exhaust pipe 906 transports the fumes and harmful gases drawn in by the vacuum pump 905 to the purification chamber 907 for purification. The purification chamber 907 provides a closed space for the purification process. The purification box 908 is slidably connected to the inside of the purification chamber 907, facilitating the disassembly and replacement of the internal dust collection box 909 and filter box 910. When the dust collection box 909 is full of fumes or the filter material needs replacement...Operators can easily remove the purification box 908 from the purification chamber 907 for cleaning and replacement. The dust collection box 909 collects larger particles of smoke and dust. The filter box 910 contains activated carbon particles 911, which adsorb harmful gases and odors. The activated carbon particles 911 have a rich porous structure and a large specific surface area, effectively adsorbing harmful gases and odors such as carbon monoxide and nitrogen oxides, thus deeply purifying the gas and improving the purification effect. The filter non-woven fabric 912 has good air permeability and filtration performance, effectively intercepting fine particles and ensuring the cleanliness of the discharged gas. The exhaust port 913 allows the purified gas to be discharged, ensuring smooth airflow.

[0029] Specifically, such as Figure 4 As shown, the clamping mechanism 8 includes a limiting rod 801, a lead screw 802, a limiting block 803, a connecting shaft 804, a servo motor 805, and a clamping plate 806. The limiting rod 801 is fixedly connected to the rear side of the top of the working plate 2.

[0030] Specifically, such as Figure 4 As shown, the limiting block 803 is fixedly connected to the front side of the top of the working plate 2, the connecting shaft 804 is rotatably connected to the inner side of the limiting block 803, the lead screw 802 is fixedly connected to both sides of the connecting shaft 804, the servo motor 805 is fixedly connected to the left side of the top of the support platform 1, and the output end of the right side of the servo motor 805 passes through the working plate 2 and is fixedly connected to the left side of the left lead screw 802.

[0031] Specifically, such as Figure 4 As shown, the front side of the left clamping plate 806 is threadedly connected to the surface of the left lead screw 802, and the rear side of the left clamping plate 806 is slidably connected to the surface of the limiting rod 801. The front side of the right clamping plate 806 is threadedly connected to the surface of the right lead screw 802, and the rear side of the right clamping plate 806 is slidably connected to the surface of the limiting rod 801. The surface of the clamping plate 806 is fixedly connected to the bottom of the connecting rod 901.

[0032] In this embodiment: A limiting rod 801 provides stable guidance and support for the movement of the clamping plate 806, restricting its horizontal freedom and ensuring it does not deviate during movement. The lead screw 802 rotates under the drive of the servo motor 805, and through its threaded connection with the clamping plate 806, it enables the horizontal movement of the clamping plate 806. The threaded transmission of the lead screw 802 has high precision and stability, allowing for accurate adjustment of the distance between the clamping plates 806 to accommodate transformer tank shells of different sizes, thus achieving a secure clamping of the tank shell. When released, the limit block 803 provides an installation position for the connecting shaft 804. The connecting shaft 804 is used to connect the lead screws 802 on both sides, ensuring synchronous rotation between the lead screws 802, thereby realizing the synchronous opposite movement of the clamping plates 806 on both sides. The servo motor 805 provides power for the rotation of the lead screws 802, enabling the clamping plates 806 to move quickly and accurately, and can adjust the clamping force as needed to ensure the clamping effect on the transformer tank shell. The clamping plates 806 are in direct contact with the transformer tank shell, and the clamping and releasing of the tank shell is achieved by driving the lead screws 802.

[0033] Specifically, such as Figure 4 As shown, the thread of the left lead screw 802 is clockwise, and the thread of the right lead screw 802 is counterclockwise. The surface of the lead screw 802 is coated with lubricant.

[0034] Specifically, such as Figure 5 As shown, a dust filter 10 is fixedly connected to the inner side of the exhaust vent 913, and the surface of the dust filter 10 is coated with an anti-corrosion coating.

[0035] In this embodiment: by setting the thread of the left lead screw 802 to be clockwise and the thread of the right lead screw 802 to be counterclockwise, when the servo motor 805 drives the lead screw 802 to rotate, the clamping plates 806 on both sides can move synchronously to the middle or to both sides, so that the clamping plates 806 can quickly and symmetrically clamp or release the transformer tank shell, improving the clamping efficiency. By setting a lubricant, the frictional resistance between the lead screw 802 and the clamping plates 806 can be effectively reduced. By setting a dust filter 10, external dust, debris and other objects can be effectively blocked from entering the purification box 907. By setting an anti-corrosion coating, the corrosion resistance of the dust filter 10 is enhanced.

[0036] Specifically, such as Figure 2 As shown, a sealing ring 11 is fixedly connected to the side of the diversion pipe 903 near the dust collection plate 902, and the surface of the sealing ring 11 is coated with anti-corrosion paint.

[0037] Specifically, such as Figure 1 As shown, the bottom of the servo motor 805 is fixedly connected to the connecting seat 12, and the bottom of the connecting seat 12 is fixedly connected to the top of the support platform 1.

[0038] In this embodiment: by setting a sealing ring 11, the connection sealing between the diverter pipe 903 and the dust collection plate 902 can be effectively improved; by setting an anti-corrosion coating, the sealing ring 11 can be effectively protected from corrosion and its service life can be extended; by setting a connecting seat 12, a stable support is provided for the servo motor 805, ensuring the stability of the servo motor 805 during operation.

[0039] Working Principle: First, the operator moves the support platform 1 to a suitable working position. Then, the operator places the transformer tank shell to be welded on the surface of the work plate 2. Next, the user powers on and starts the servo motor 805. When the servo motor 805 runs, its power is transmitted to the left lead screw 802, causing the left lead screw 802 to rotate clockwise. Since the left lead screw 802 is connected to the connecting shaft 804, the rotation of the left lead screw 802 will drive the connecting shaft 804 to rotate synchronously. The connecting shaft 804 is connected to the right lead screw 802, so the rotation of the connecting shaft 804 will drive the right lead screw 802 to rotate synchronously. At this time, the left clamping plate 806 and the right clamping plate 806 are based on the lead screw. The rotation of 802 will cause it to move synchronously in opposite directions, thus firmly clamping the transformer tank shell on the top of the work plate 2. After successfully clamping the transformer tank shell, the operator will power on again and start the reduction motor 4. The reduction motor 4, through the rotation of the threaded rod 3, will drive the base 5 to move smoothly on the work plate 2. The movement of the base 5 will drive the robotic arm 6 mounted on it to move synchronously. When the robotic arm 6 moves to a suitable welding position, the operator will turn off the reduction motor 4, and then power on and start the two dust pumps 905 and the robotic arm 6 respectively. After the robotic arm 6 starts, it will drive the welding head 7 to perform welding operations on the transformer tank shell. At the same time, the dust pump 905 starts working, and the powerful suction will be connected to the welding head 7 to perform welding operations. The hose 904 transmits the suction to the diversion pipe 903, which further guides the suction to the suction plate 902. This allows the suction plate 902 to quickly and efficiently extract welding fumes and harmful gases generated near the clamping plate 806. The extracted fumes and harmful gases are then guided to the exhaust pipe 906 via the diversion pipe 903 and the connecting hose 904. The exhaust pipe 906 then smoothly transports these fumes and harmful gases into the purification chamber 907. Once the fumes and harmful gases enter the purification chamber 907, larger particles will fall directly into the dust collection box 909 due to gravity, while the remaining fumes and harmful gases continue to flow within the purification chamber 907. After passing through the filter non-woven fabric 912... The non-woven filter 912 intercepts small particulate impurities contained in the smoke and harmful gases and causes them to fall into the dust collection box 909. After preliminary filtration, the smoke and harmful gases enter the filter box 910 and come into full contact with the activated carbon particles 911 filled inside. The activated carbon particles 911, with their strong adsorption capacity, perform final deep absorption and filtration of the smoke and harmful gases. After the above-mentioned strict filtration and purification, the clean gas is smoothly discharged from the purification box 907 through the exhaust port 913. Finally, after the entire welding work is completed, the operator only needs to pull the purification box 908 out of the purification box 907, clean the inside of the purification box 908, and replace the activated carbon particles 911 if necessary.

[0040] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A welding protection device for transformer oil tank enclosures comprising a support table (1), characterised in that: The top of the support platform (1) is fixedly connected to a work plate (2), and the rear side of the work plate (2) is rotatably connected to a threaded rod (3). The left side of the top of the support platform (1) is fixedly connected to a reduction motor (4). The output end of the reduction motor (4) passes through the work plate (2) and is fixedly connected to the left side of the threaded rod (3). The surface of the threaded rod (3) is threadedly connected to a base (5). The top of the base (5) is fixedly connected to a robotic arm (6). The bottom of the robotic arm (6) is fixedly connected to a welding head (7). The top of the work plate (2) is fixedly connected to a clamping mechanism (8). The surface of the clamping mechanism (8) is fixedly connected to a dust collection mechanism (9). The vacuuming mechanism (9) includes a connecting rod (901), two vacuum plates (902), two diversion pipes (903), two connecting hoses (904), two vacuum pumps (905), two dust discharge pipes (906), a purification box (907), a purification container (908), two dust collection boxes (909), a filter box (910), activated carbon granules (911), a filter non-woven fabric (912), and an exhaust port (913). The connecting rod (901) is fixedly connected to both sides of the surface of the clamping mechanism (8). The vacuum plates (902) are fixedly connected to the top of the connecting rod (901). The diversion pipes (903) are fixedly connected to the inner side of the vacuum plates (902). The connecting hoses (904) are fixedly connected to the side of the diversion pipes (903) away from the vacuum plates (902). The vacuum pumps (905) are fixedly connected to the support platform (1). The dust exhaust pipe (906) is fixedly connected to the rear side of the dust pump (905) on both sides of the top. The purification box (907) is fixedly connected to the bottom of the support platform (1). The purification box (908) is slidably connected to the inside of the purification box (907). The bottom of the dust exhaust pipe (906) passes through the support platform (1) and is fixedly connected to both sides of the purification box (907). The dust collection box (909) is fixedly connected to both sides of the top of the purification box (908). The filter box (910) is fixedly connected to the top of the purification box (908). The activated carbon particles (911) are placed inside the filter box (910). The filter non-woven fabric (912) is fixedly connected to the side of the dust collection box (909) near the filter box (910). The exhaust port (913) is opened on the rear side of the filter box (910) and the rear side of the purification box (907).

2. The transformer tank casing welding protection device according to claim 1, characterized in that: The clamping mechanism (8) includes a limiting rod (801), a lead screw (802), a limiting block (803), a connecting shaft (804), a servo motor (805), and a clamping plate (806). The limiting rod (801) is fixedly connected to the rear side of the top of the working plate (2).

3. The welding protection device for transformer tank casing according to claim 2, characterized in that: The limiting block (803) is fixedly connected to the front side of the top of the working plate (2), the connecting shaft (804) is rotatably connected to the inner side of the limiting block (803), the lead screw (802) is fixedly connected to both sides of the connecting shaft (804), the servo motor (805) is fixedly connected to the left side of the top of the support platform (1), and the output end of the right side of the servo motor (805) passes through the working plate (2) and is fixedly connected to the left side of the left lead screw (802).

4. The transformer tank casing welding protection device according to claim 2, characterized in that: The front side of the left clamping plate (806) is threadedly connected to the surface of the left lead screw (802), and the rear side of the left clamping plate (806) is slidably connected to the surface of the limiting rod (801). The front side of the right clamping plate (806) is threadedly connected to the surface of the right lead screw (802), and the rear side of the right clamping plate (806) is slidably connected to the surface of the limiting rod (801). The surface of the clamping plate (806) is fixedly connected to the bottom of the connecting rod (901).

5. A welding protection device for transformer tank casing according to claim 2, characterized in that: The thread of the left lead screw (802) is clockwise, and the thread of the right lead screw (802) is counterclockwise. The surface of the lead screw (802) is coated with lubricant.

6. The welding protection device for transformer tank casing according to claim 1, characterized in that: A dust filter (10) is fixedly connected to the inner side of the exhaust port (913), and the surface of the dust filter (10) is coated with an anti-corrosion coating.

7. The welding protection device for transformer tank casing according to claim 1, characterized in that: A sealing ring (11) is fixedly connected to the side of the diversion pipe (903) near the dust collection plate (902), and the surface of the sealing ring (11) is coated with anti-corrosion paint.

8. The welding protection device for transformer tank casing according to claim 2, characterized in that: The bottom of the servo motor (805) is fixedly connected to a connecting seat (12), and the bottom of the connecting seat (12) is fixedly connected to the top of the support platform (1).

Images