Connecting rod welding tool for steam turbine

Abstract

The invention belongs to the related technical field of welding tools, and particularly discloses a steam turbine connecting rod welding tool which comprises a welding table, the upper end face of the welding table is connected with a plasma arc welding device through an arranged sliding mechanism, and two sets of side frames are arranged on the upper end face of the welding table and located at the front end of the sliding mechanism in parallel. Sliding rods are fixedly arranged at the lower ends of the interiors of the two sets of side frames correspondingly, sliding bases are slidably installed at the two ends of the exteriors of the two sliding rods correspondingly, the upper end faces of the two sets of sliding bases are connected with installation bases through arranged rotating mechanisms correspondingly, and a hanging assembly is arranged between the two sets of side frames and close to the middle. And welding operation can be quickly matched according to an annular track in the process.

Description

Technical Field

[0001] The invention belongs to the technical field related to welding tools, and specifically discloses a connecting rod welding tool for a steam turbine. Background Art

[0002] Steam turbine is a kind of rotary power machine that converts thermal energy into mechanical energy. It is widely used in power generation, ship propulsion and industrial drive. As an important energy conversion device, steam turbines play a key role in many fields. With technological advances, their efficiency and environmental performance will continue to improve; When the connecting rod of a steam turbine component is welded by a plasma arc welding machine, there is no positioning device to fit the connecting rod and the connecting ear. It needs to be manually spliced ​​and placed before welding. The positioning is not accurate enough, the welding efficiency is low, and the weld layers are uneven, which seriously affects the quality of the connecting rod. Therefore, we need to improve it. Summary of the invention

[0003] The purpose of the present invention is to solve the problems existing in the background technology, and a connecting rod welding tool for a steam turbine is proposed, comprising a welding table, the upper end surface of the welding table is connected to a plasma arc welding device through a sliding mechanism, two groups of side frames are arranged in parallel on the upper end surface of the welding table and at the front end of the sliding mechanism, the lower ends of the two groups of side frames are fixedly provided with sliding rods, the two ends of the two slide rods are respectively slidably installed with sliding seats, the upper end surfaces of the two groups of slide seats are connected to mounting seats through a rotating mechanism, and a suspension component is arranged between the two groups of side frames and near the middle; The plasma arc welding device comprises a frame arm fixedly mounted on the upper end surface of the slide, a welding gun is arranged on one side inside the frame arm, and a welding end of the welding gun is located between two sets of side frames.

[0004] Preferably, the sliding mechanism comprises a screw drive mechanism arranged on the upper end surface of the welding table, a slide table is slidably arranged outside the screw drive mechanism, and the plasma arc welding device is arranged on the upper end surface of the slide table.

[0005] Preferably, the rotating mechanism includes a motor fixedly mounted on the upper end surface of the sliding seat, the motor output end is connected to a movable seat, the outer side of the movable seat is fixedly connected to the mounting seat, the inner sides of the mounting seat and near the lower position are connected to fixed ear seats through corresponding threaded positioning bolts, and the outer surface of the fixed ear seat is provided with an ear groove.

[0006] Preferably, the suspension assembly includes a suspension platform, a clamping assembly is arranged inside the suspension platform, a clamping rod is inserted at the lower part of the suspension platform, and abutment platforms are fixedly arranged at both ends of the clamping rod, arc-shaped openings are opened on the upper surfaces of the two groups of the abutment platforms, and connecting columns are arranged on both sides of the outside of the two groups of the abutment platforms, and the outer sides of the two connecting columns at the same end are connected to the top walls of the side frames on both sides through the arranged pull rods, and the outer walls on the side away from each other of the two pull rods are provided with rounded components.

[0007] Preferably, the rounding assembly includes a bracket fixedly mounted on one side of the outer wall of the pull rod, a second cylinder is installed inside one end of the bracket, a fixing rod is provided at the telescopic end of the second cylinder, an arc block is connected to the lower end of the fixing rod, a section ring is provided on the edge of the inner wall of the arc block, and a wear-resistant layer is provided on the inner surface of the section ring.

[0008] Preferably, the clamping assembly includes first cylinders respectively clamped on both sides of the interior of the suspension platform, and two groups of the first cylinder telescopic ends are fixedly provided with clamping blocks, and the inner surfaces of the sides where the two groups of the clamping blocks are close to each other are provided with arc grooves, and multiple groups of balls are embedded in the arc grooves.

[0009] Preferably, a fixing platform is fixedly provided on the upper surface of the welding platform and near the middle, a two-way telescopic rod is provided inside the fixing platform, and both ends of the two-way telescopic rod are connected to sliding seats at corresponding positions.

[0010] Compared with the prior art, the present invention has the following beneficial effects: 1. Through the set driving mechanism, the slide can be driven to move horizontally above the welding table, so as to drive the slide, the arm and the welding gun to move, so that the welding gun can synchronously weld the two ears at both ends of the connecting rod body, thereby improving the welding efficiency.

[0011] 2. By setting up the side frame and suspension assembly, when welding the rotating welding assembly rod body, it can cooperate with the clamping blocks on both sides to rotate inside the clamping blocks, ensuring that the axial positions of the assembly rod body and the two ears are consistent during circular welding, thereby ensuring the stability of the rod body and the two ears.

[0012] 3. Through the setting of the rotating assembly, during the welding process, the welding gun can be used to spot weld the outer surfaces of the two ears respectively, so that the two ears can have a certain connection relationship with the rod body, and then the movable seat and the mounting seat are driven to synchronously drive the rod body to rotate, so as to complete the circular welding and ensure the stability and quality of welding.

[0013] 4. After welding is completed, the rod body and the double ears are driven to rotate by the second cylinder, the bracket, the arc block and the section ring to fit with the wear-resistant layer inside the section ring. During the rotation, the wear-resistant layer can ensure the smoothness of the weld and make the weld more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall connection structure of the present invention from another angle; Figure 3 For the present invention Figure 1 The enlarged structural diagram at A in the middle; Figure 4 It is a schematic diagram of the connection structure between the side frame and the pull rod of the present invention; Figure 5 It is a schematic diagram of the connection structure of the rotating mechanism of the present invention; Figure 6 This is a schematic diagram of the section ring connection structure of the present invention; Figure 7 For the present invention Figure 2 Enlarged structural diagram at B in the middle.

[0015] In the figure: 1, welding table; 2, screw drive mechanism; 3, slide; 4, side frame; 5, frame arm; 6, two-way telescopic rod; 7, fixed table; 8, welding gun; 9, pull rod; 10, arrival table; 11, connecting column; 12, hanging table; 13, clamping block; 14, arc-shaped mouth; 15, mounting seat; 16, positioning bolt; 17, clamping rod; 18, first cylinder; 19, ball bearing; 20, slide seat; 21, arc-shaped block; 22, movable seat; 23, fixed rod; 24, clamping frame; 25, slide rod; 26, fixed ear seat; 27, second cylinder; 28, section ring; 29, wear-resistant layer; 30, motor; 31, ear groove. DETAILED DESCRIPTION

[0016] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0018] like Figure 1-Figure 7 The connecting rod welding tool for a steam turbine shown in the figure comprises a welding table 1, the upper end surface of the welding table 1 is connected to a plasma arc welding device via a sliding mechanism, two groups of side frames 4 are arranged in parallel on the upper end surface of the welding table 1 and at the front end of the sliding mechanism, sliding rods 25 are fixedly arranged at the lower ends of the two groups of side frames 4, and sliding seats 20 are slidably installed at the two ends of the two sliding rods 25, and the upper end surfaces of the two groups of sliding seats 20 are connected to mounting seats 15 via a rotating mechanism, and a suspension assembly is arranged between the two groups of side frames 4 and near the middle.

[0019] The sliding mechanism comprises a screw drive mechanism 2 arranged on the upper end surface of the welding table 1, a slide table 3 is slidably arranged outside the screw drive mechanism 2, and a plasma arc welding device is arranged on the upper end surface of the slide table 3; The plasma arc welding device comprises a frame arm 5 fixedly mounted on the upper end surface of the slide 3, a welding gun 8 is arranged on one side of the frame arm 5, and a welding end of the welding gun 8 is located between two sets of side frames 4; Please refer to the instruction manual Figure 1 and Figure 2 It can be seen that the arm 5 is equipped with a welding gun 8. Driven by the screw drive mechanism 2, the slide 3 moves laterally outside the screw drive mechanism 2, so that the welding gun 8 can move in one ear or both ears at the same time during the lateral movement.

[0020] The rotating mechanism includes a motor 30 fixedly mounted on the upper end surface of the slide seat 20, the output end of the motor 30 is connected to the movable seat 22, the outer side of the movable seat 22 is fixedly connected to the mounting seat 15, and the inner sides of the mounting seat 15 and the lower sides are connected to the fixed ear seat 26 through the corresponding threaded positioning bolts 16, and the outer surface of the fixed ear seat 26 is provided with an ear notch 31; Please refer to the instruction manual Figure 4 It can be seen that the rotation of the motor 30 drives the front movable seat 22 and the mounting seat 15 to rotate, and the fixed ear seat 26 inside the mounting seat 15 can drive the two ears to rotate, so as to achieve the purpose of annular welding; When in use, the ear notch 31 inside the fixed ear seat 26 can wrap the side elevation of the ear of the connecting rod, so that the clamping effect is better.

[0021] The suspension assembly includes a suspension platform 12, a clamping assembly is arranged inside the suspension platform 12, a clamping rod 17 is inserted at the bottom of the suspension platform 12, and abutment platforms 10 are fixedly arranged at both ends of the clamping rod 17, arc-shaped openings 14 are opened on the upper surfaces of the two groups of abutment platforms 10, and connecting columns 11 are arranged on both sides of the outside of the two groups of abutment platforms 10, and the outer sides of the two connecting columns 11 at the same end are connected to the top walls of the side frames 4 on both sides through the arranged pull rods 9, and the outer walls of the two pull rods 9 on the side away from each other are provided with rounded components; Please refer to the instruction manual Figure 3 and Figure 4 It can be seen that the clamping rod 17 is provided to enable the abutment platforms 10 at both ends to be erected on both sides of the suspension platform 12, so as to facilitate the placement of the rod body, and to ensure the stability of the rod body during welding by the clamping of the clamping assembly in the later stage; With the connection column 11 installed, the suspension platform 12 is stably erected between the two sets of side frames 4 through the inclined pull rod 9 for use.

[0022] The rounding assembly includes a bracket 24 fixedly mounted on one side of the outer wall of the pull rod 9, a second cylinder 27 is installed inside one end of the bracket 24, a fixed rod 23 is provided at the telescopic end of the second cylinder 27, an arc block 21 is connected to the lower end of the fixed rod 23, a section ring 28 is provided on the inner wall edge of the arc block 21, and a wear-resistant layer 29 is provided on the inner surface of the section ring 28; Please refer to the instruction manual Figure 6 and Figure 7 It can be seen that the connection of the bracket 24 allows the second cylinder 27 to be stably set on one side of the pull rod 9 for use. Through the telescopic drive of the second cylinder 27, the fixed rod 23 and the arc block 21 at the end are moved toward the weld where the final welding is completed, so that the section ring 28 is against the weld. The section ring 28 has an oblique cone shape, which can round the irregular weld area, thereby ensuring the welding quality. The wear-resistant layer 29 is made of diamond abrasive grains, which has good wear resistance and long service life.

[0023] The clamping assembly includes first cylinders 18 respectively clamped on both sides of the suspension platform 12, and clamping blocks 13 are fixedly arranged at the telescopic ends of the two sets of first cylinders 18. The inner surfaces of the two sets of clamping blocks 13 close to each other are provided with arc grooves, and multiple sets of balls 19 are embedded in the arc grooves. Please refer to the instruction manual Figure 4 It can be seen that when the first cylinder 18 drives the clamping block 13 to approach each other and finally press against the outside of the rod body, the multiple groups of balls 19 on the inner surface can roll against the outside of the rod body. At the same time, the arc-shaped opening 14 opened on the upper surface of the platform 10 can rotate to complete the circular welding while ensuring that the rod body is consistent with the double-ear welding axis when the rod body is clamped.

[0024] A fixed platform 7 is fixedly arranged on the upper end surface of the welding platform 1 and near the middle, and a two-way telescopic rod 6 is arranged inside the fixed platform 7, and both ends of the two-way telescopic rod 6 are connected to the slide seat 20 at the corresponding position; Please refer to the instruction manual Figure 1 , Figure 2 and Figure 5 It can be seen that, under the connection of the fixed platform 7, the two-way telescopic rod 6 can drive the slide seats 20 at both ends to slide outside the slide rod 25, so that the rotating mechanism above the slide seat 20 and one end of the rod body engaged with the hanging platform 12 are close.

[0025] Working principle: When the device is in use, the rod body to be welded is first placed at the arc-shaped openings 14 of the abutment platforms 10 on both sides, and the corresponding welded ears are respectively placed with the cut surfaces at the ear notches 31 inside the fixed ear seats 26 at both ends. With the driving of the bidirectional telescopic rod 6, the two sets of slide seats 20 approach each other, causing the ears to abut against the rod body. At this time, the welding gun 8 can be driven by the screw drive mechanism 2 to move to the connection between the ears and the rod body. The welding gun 8 first welds the ears and the rod body from the top, so that the edges of the ears and the rod body can be connected together. When the motor 30 drives the movable seat 22 and the mounting seat 15 to rotate, the rod body and the ears can rotate synchronously at this time. In order to ensure that the two ears and the rod body are on the same axis during the rotation of the rod body, the first cylinders 18 on both sides of the suspension platform 12 drive the clamping blocks 13 at the telescopic ends to clamp on the outer surface of the rod body. During the rotation, the two ears can be rotated only through the multiple groups of balls 19 on the inner surface of the clamping blocks 13, and the welding gun 8 completes the annular welding of the two ears and the rod body during the rotation. After welding is completed, the second cylinder 27 drives the bracket 24 and the arc block 21 close to the weld, rotates the rod body and the two ears again, and the section ring 28 presses on the irregular weld to round it, thereby ensuring the uniformity and beauty of the weld and improving the welding quality.

[0026] The above shows and describes 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, and the above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. A connecting rod welding tool for a steam turbine, comprising a welding table (1), characterized in that: The upper end surface of the welding table (1) is connected to a plasma arc welding device via a sliding mechanism, and two sets of side frames (4) are arranged in parallel on the upper end surface of the welding table (1) and at the front end of the sliding mechanism, and the lower ends of the two sets of side frames (4) are fixedly provided with sliding rods (25), and the two ends of the two slide rods (25) are slidably mounted with sliding seats (20), and the upper end surfaces of the two sets of slide seats (20) are connected to the mounting seats (15) via the rotating mechanism, and a suspension component is arranged between the two sets of side frames (4) and near the middle; The plasma arc welding device comprises a frame arm (5) fixedly mounted on the upper end surface of a slide table (3), a welding gun (8) being arranged on one side inside the frame arm (5), and a welding end of the welding gun (8) being located between two sets of side frames (4).

2. The connecting rod welding tool for a steam turbine according to claim 1, characterized in that: The sliding mechanism comprises a screw drive mechanism (2) arranged on the upper end surface of the welding table (1), a slide table (3) is slidably arranged outside the screw drive mechanism (2), and the plasma arc welding device is arranged on the upper end surface of the slide table (3).

3. The connecting rod welding tool for a steam turbine according to claim 1, characterized in that: The rotating mechanism comprises a motor (30) fixedly mounted on the upper end surface of the sliding seat (20); the output end of the motor (30) is connected to a movable seat (22); the outer side of the movable seat (22) is fixedly connected to the mounting seat (15); the inner sides of the mounting seat (15) and near the lower position are connected to fixed ear seats (26) through corresponding threaded positioning bolts (16); and the outer surface of the fixed ear seat (26) is provided with an ear slot (31).

4. The connecting rod welding tool for a steam turbine according to claim 1, characterized in that: The suspension assembly comprises a suspension platform (12), a clamping assembly is arranged inside the suspension platform (12), a clamping rod (17) is inserted at the lower part of the suspension platform (12), and abutment platforms (10) are fixedly arranged at both ends of the clamping rod (17), arc-shaped openings (14) are opened on the upper surfaces of the two groups of the abutment platforms (10), and connecting columns (11) are arranged on both sides of the outside of the two groups of the abutment platforms (10), and the outer sides of the two connecting columns (11) at the same end are connected to the top walls of the side frames (4) on both sides through the arranged pull rods (9), and the outer walls of the two pull rods (9) on the side away from each other are provided with rounded components.

5. The connecting rod welding tool for a steam turbine according to claim 4, characterized in that: The rounding assembly comprises a bracket (24) fixedly mounted on one side of the outer wall of the pull rod (9), a second cylinder (27) being mounted inside one end of the bracket (24), a fixed rod (23) being arranged at the telescopic end of the second cylinder (27), an arc block (21) being connected to the lower end of the fixed rod (23), a section ring (28) being arranged on the edge of the inner wall of the arc block (21), and a wear-resistant layer (29) being arranged on the inner surface of the section ring (28).

6. The connecting rod welding tool for a steam turbine according to claim 4, characterized in that: The clamping assembly comprises first cylinders (18) respectively clamped on two sides of the interior of the suspension platform (12), and clamping blocks (13) are fixedly provided at the telescopic ends of the two groups of the first cylinders (18), and arc grooves are provided on the inner surfaces of the sides of the two groups of the clamping blocks (13) close to each other, and a plurality of groups of balls (19) are embedded in the arc grooves.

7. The connecting rod welding tool for a steam turbine according to claim 1, characterized in that: A fixing platform (7) is fixedly arranged on the upper end surface of the welding platform (1) and near the middle thereof, a bidirectional telescopic rod (6) is arranged inside the fixing platform (7), and both ends of the bidirectional telescopic rod (6) are connected to slide seats (20) at corresponding positions.

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