Instrumentation tubing valve welding turret

Abstract

The application relates to the technical field of valve welding, in particular to an instrument pipe fitting valve welding rotary table which comprises a base, the base is provided with clamping and fixing mechanisms, linkage fixing mechanisms and rotary welding mechanisms; the linkage fixing mechanisms comprise positioning seats, square grooves are arranged at the top ends of the positioning seats and used for placing square valve bodies, extension grooves are arranged at the two sides of the corresponding grooves at the top ends of the positioning seats, the two extension grooves are arranged in an inclined and symmetrical mode, extension plates are slidably connected to the inner walls of the two extension grooves, and the top ends of the two extension plates are fixedly connected with pressing blocks which are in contact with the top ends of the square valve bodies; the conical pipe can be adsorbed and fixed on the circular seat, the axial line of the circular seat and the axial line of the square valve body are on the same straight line, therefore, when the conical pipe moves, accurate butt joint can be realized, the back-and-forth adjustment of the position is avoided, the operation is simplified, and the subsequent welding efficiency can be guaranteed.

Description

Technical Field

[0001] This invention relates to the field of valve welding technology, and in particular to a valve welding turntable for instrument fittings. Background Technology

[0002] Instrument valves are pipeline accessories used in piping systems to control parameters such as the direction of medium flow, pressure, and flow rate. Their core function is to achieve precise control of the transported medium (such as liquid, gas, powder, etc.) by changing the cross-sectional area of ​​the passage or the direction of medium flow. When manufacturing and welding instrument valves, a welding turntable is needed to adjust the valve angle so that welding can be performed at the required positions. During welding, automatic and semi-automatic electric arc welding operations can be performed. Automatic electric arc welding is an electric arc welding technology that uses automated equipment to control welding parameters and execute operations, while semi-automatic electric arc welding is a welding method in which some steps are completed automatically by machinery and some steps require manual operation.

[0003] In existing technology, when manufacturing instrument valve fittings, a tapered tube needs to be welded onto a square valve body. Therefore, the tapered tube needs to be clamped and fixed onto the square valve body to ensure the stability of the square valve body and the tapered tube. Then, the gap between the square valve body and the tapered tube is welded using an arc welding gun. However, when welding the square valve body and the tapered tube, the square valve body and the tapered tube need to be clamped and fixed separately. Then, they are manually assembled. However, it is impossible to ensure that the center lines of the square valve body and the tapered tube are on the same straight line during assembly. Therefore, adjustments are required, which makes the operation cumbersome and affects the subsequent welding efficiency. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the prior art by proposing a welding turntable for instrument fittings and valves.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a welding turntable for instrument pipe fittings and valves, including a base, wherein a clamping and fixing mechanism, a linkage fixing mechanism and a rotating welding mechanism are provided on the base;

[0006] The linkage fixing mechanism includes a positioning seat, a square groove at the top of the positioning seat for placing a square valve body, and telescopic grooves on both sides of the groove at the top of the positioning seat. The two telescopic grooves are arranged obliquely and symmetrically. Telescopic plates are slidably connected to the inner walls of the two telescopic grooves. A pressure block is fixedly connected to the top of the two telescopic plates and contacts the top of the square valve body. The pressure block is used to clamp and fix the square valve body.

[0007] The clamping and fixing mechanism includes a circular seat, and there are two circular seats. Each of the two circular seats has a conical groove at one end close to each other. The two conical grooves are used to place a conical tube. The circular seat moves towards the square valve body and makes the conical tube and the two ends of the square valve body in close contact, thereby completing the clamping and fixing of the conical tube and the square valve body.

[0008] Preferably, the clamping and fixing mechanism further includes movable upright plates slidably connected to both sides of the top of the base, with movable columns fixedly connected to one end of each of the two movable upright plates, and the two movable columns and two circular seats rotatably connected respectively. It also includes support seats fixedly connected to the inner side of the corresponding movable upright plates at the top of the base, with electric push rods fixedly connected to one end of each of the two support seats, and the telescopic ends of the two electric push rods and the two movable upright plates fixedly connected respectively.

[0009] Preferably, the clamping and fixing mechanism further includes adsorption holes passing through the four sides of the inner wall of the conical groove, and the outer wall of each circular seat is fixedly connected with annular connecting pipes through pipes. The two sets of annular connecting pipes and adsorption holes are respectively connected. The top of each of the two circular seats is fixedly connected with a vacuum pump, and the two vacuum pumps and the two annular connecting pipes are respectively connected through pipes.

[0010] Preferably, the linkage fixing mechanism further includes a fixing ring rotatably connected to the outer wall of the moving column, with connecting rods fixedly connected to both sides of the outer wall of the two fixing rings, and guide rods fixedly connected to one end of each of the two sets of connecting rods, with limit plates fixedly connected to one end of each of the two sets of guide rods.

[0011] Preferably, the linkage fixing mechanism further includes square holes passing through the telescopic groove at opposite ends, and a first pulley group and a second pulley group are fixedly installed on both sides of the inner wall of the two square holes respectively, with the first pulley group and the second pulley group in each group arranged vertically.

[0012] Preferably, steel wire ropes are fixedly connected to the bottom ends of both telescopic plates, and springs are symmetrically fixedly connected between each set of telescopic plates and telescopic grooves. The steel wire ropes pass between the rollers on the first pulley group and the second pulley group, and the two steel wire ropes are fixedly connected to the two guide rods on the lower side.

[0013] Preferably, the rotary welding mechanism includes a support plate fixedly connected to the inner side of the support seat at the top of the base, a support ring fixedly connected to the top of each of the two sets of support plates, a second toothed ring rotatably connected to one end of each of the two support rings, a connecting ring fixedly connected to the inner wall of each of the two second toothed rings, the two connecting rings being fixedly connected to the positioning seat, a second gear meshing with the outer diameter of each of the two second toothed rings, a drive shaft fixedly connected to each of the two second gears, and the drive shaft being rotatably connected to the support seat.

[0014] Preferably, the rotary welding mechanism further includes a rotating ring rotatably connected to the top of the support base. A fixed disk is rotatably connected to the inner wall of each of the two rotating rings. The two fixed disks and two moving columns slide through each other. The rotating ring and the connecting ring slide through the outer wall of the guide rod. A first toothed ring is fixedly connected to the outer wall of each of the two rotating rings. A first gear is meshed with the outer diameter of each of the two first toothed rings. The two first gears are fixedly connected to a drive shaft. The two first gears are respectively disposed inside the two support bases. A motor is fixedly connected to one end of one of the support bases, and the drive end of the motor is fixedly connected to the drive shaft.

[0015] Preferably, each of the two fixed plates has a crossbar fixedly connected to its top end near one other, and an arc welding gun is fixedly connected to the inner side of the bottom end of each of the two crossbars.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The set clamping and fixing mechanism can adsorb and fix the tapered tube on the circular seat. Since the axis of the circular seat and the axis of the square valve body are on the same straight line, precise docking can be achieved when the tapered tube moves, avoiding the need to adjust the position back and forth, simplifying the operation, and thus ensuring the efficiency of subsequent welding.

[0018] 2. Through the linkage fixing mechanism, when the tapered tube is moved, the square valve body can be pushed to move on the positioning seat, so that the square valve body is in the center of the positioning seat. At the same time, the telescopic column and pressure block are moved down by the wire rope to fix the top of the square valve body, so as to prevent the square valve body from shifting during welding, and to ensure the welding position is accurate and the welding quality is guaranteed.

[0019] 3. The rotating welding mechanism ensures that the arc welding gun remains stationary during welding, keeping the distance between the arc welding gun and the weld position constant. This guarantees consistent welding results at every point, avoids arc blow, and ensures weld quality. The stable arc length also reduces metal spatter and welding fumes, improves the working environment, reduces post-weld cleaning workload, and enables automated arc welding. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a valve welding turntable for instrument fittings according to the present invention;

[0021] Figure 2 This invention relates to a welding turntable for instrument fittings and valves. Figure 1 Enlarged view of the structure at point A in the middle;

[0022] Figure 3This is another side view of the instrument fitting valve welding turntable of the present invention;

[0023] Figure 4 This is a partial structural illustration of a valve welding turntable for instrument fittings according to the present invention;

[0024] Figure 5 This is a partial structural illustration of a valve welding turntable for instrument fittings according to the present invention;

[0025] Figure 6 This is a partial sectional view of the positioning seat of a valve welding turntable for instrument fittings according to the present invention;

[0026] Figure 7 This is a further sectional view of the positioning seat of the instrument fitting valve welding turntable of the present invention;

[0027] Figure 8 This is a partial structural diagram of a valve welding turntable for instrument fittings according to the present invention.

[0028] In the diagram: 1. Base; 2. Fixed plate; 3. Moving column; 4. Fixed ring; 5. Connecting rod; 6. Rotating ring; 7. First toothed ring; 8. Moving upright plate; 9. Support ring; 10. Second toothed ring; 11. Positioning seat; 12. Drive shaft; 13. Second gear; 14. Support plate; 15. Support seat; 16. Motor; 17. Electric push rod; 18. Circular seat; 19. Air pump; 20. Crossbar; 21. Arc welding gun; 22. Square valve body; 23. Conical tube; 24. Annular connecting tube; 25. Guide rod; 26. First gear; 27. Conical groove; 28. Adsorption hole; 29. ​​Pressure block; 30. Telescopic plate; 31. Steel wire rope; 32. Spring; 33. Telescopic groove; 34. First pulley block; 35. Square hole; 36. Second pulley block; 37. Connecting ring. Detailed Implementation

[0029] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0030] like Figures 1-8The instrument fitting valve welding turntable shown includes a base 1, on which a clamping and fixing mechanism, a linkage fixing mechanism, and a rotary welding mechanism are provided. The linkage fixing mechanism includes a positioning seat 11, with a square groove at the top of the positioning seat 11 for placing a square valve body 22. Telescopic grooves 33 are provided on both sides of the groove at the top of the positioning seat 11, arranged obliquely symmetrically. Telescopic plates 30 are slidably connected to the inner walls of both telescopic grooves 33. Pressure blocks 29, which contact the top of the square valve body 22, are fixedly connected to the top of each of the two telescopic plates 30, and are used to clamp and fix the square valve body 22. The clamping and fixing mechanism includes two circular seats 18, each with a conical groove 27 at one end close to the other, for placing a conical tube 23. The circular seats 18 move towards the square valve body 22, making the conical tube 23 and both ends of the square valve body 22 in close contact, thus clamping and fixing the conical tube 23 and the square valve body 22.

[0031] like Figure 1 , Figure 3 As shown, the clamping and fixing mechanism also includes movable upright plates 8 slidably connected to both sides of the top of the base 1. Movable columns 3 are fixedly connected to one end of each movable upright plate 8 that is close to each other. The two movable columns 3 and two circular seats 18 are rotatably connected. The mechanism also includes support seats 15 fixedly connected to the inner sides of the movable upright plates 8 at the top of the base 1. Electric push rods 17 are fixedly connected to one end of each support seat 15 that is far from each other. The telescopic ends of the two electric push rods 17 are fixedly connected to the two movable upright plates 8. The support seats 15 fix and limit the electric push rods 17.

[0032] like Figure 2 , Figure 5 As shown, the clamping and fixing mechanism also includes adsorption holes 28 passing through the four sides of the inner wall of the conical groove 27. The outer walls of the circular seats 18 are all fixedly connected to annular connecting pipes 24 via pipes. The two sets of annular connecting pipes 24 are connected to the adsorption holes 28 respectively. The tops of the two circular seats 18 are fixedly connected to vacuum pumps 19, and the two vacuum pumps 19 are connected to the two annular connecting pipes 24 via pipes. By generating negative pressure within the adsorption holes 28 through the vacuum pumps 19 and annular connecting pipes 24, the conical tube 23 can be fixed, facilitating subsequent docking operations.

[0033] like Figure 1 , Figure 4 As shown, the linkage fixing mechanism also includes a fixing ring 4 rotatably connected to the outer wall of the moving column 3. Connecting rods 5 are fixedly connected to both sides of the outer wall of the two fixing rings 4. Guide rods 25 are fixedly connected to one end of each set of connecting rods 5, and limit plates are fixedly connected to one end of each set of guide rods 25. The guide rods 25 move the wire rope 31, keeping it taut, thus fixing the top of the square valve body 22.

[0034] like Figure 6 , Figure 7 As shown, the linkage fixing mechanism also includes square holes 35 passing through the telescopic groove 33 at opposite ends. A first pulley group 34 and a second pulley group 36 are fixedly installed on both sides of the inner wall of the two square holes 35, respectively. Each first pulley group 34 and second pulley group 36 are arranged vertically. Steel wire ropes 31 are fixedly connected to the bottom ends of both telescopic plates 30. Springs 32 are symmetrically fixedly connected between each telescopic plate 30 and the telescopic groove 33. The steel wire ropes 31 pass between the rollers on the first pulley group 34 and the second pulley group 36. The two steel wire ropes 31 are fixedly connected to the two lower guide rods 25. The first pulley group 34 and the second pulley group 36 protect the steel wire ropes 31, reducing friction and extending their service life. After welding, the springs 32 automatically reset the telescopic plates 30. The telescopic plates 30 and the telescopic groove 33 are limited by a sliding groove and a slider. After the telescopic plates 30 reset, the steel wire ropes 31 are in a loose state.

[0035] like Figure 1 , Figure 2 , Figure 4 , Figure 8 As shown, the rotary welding mechanism includes a support plate 14 fixedly connected to the top of the base 1 corresponding to the inner side of the support seat 15. Support rings 9 are fixedly connected to the top of both support plates 14. Two second gear rings 10 are rotatably connected to one end of each support ring 9, which is close to each other. Connecting rings 37 are fixedly connected to the inner walls of both second gear rings 10. The two connecting rings 37 are fixedly connected to the positioning seat 11. Second gears 13 are meshed with the outer diameters of both second gear rings 10. Drive shafts 12 are fixedly connected to the two second gears 13. Drive shafts 12 are rotatably connected to the support seat 15. The rotary welding mechanism also includes a rotary ring 6 rotatably connected to the top of the support seat 15. Fixed disks 2 are rotatably connected to the inner walls of both rotary rings 6. The two fixed disks 2 and two shifting... The moving column 3 slides through the guide rod 25, and the rotating ring 6 and the connecting ring 37 slide through the outer wall of the guide rod 25. The outer walls of the two rotating rings 6 are fixedly connected with the first toothed rings 7. The outer diameters of the two first toothed rings 7 are meshed with the first gears 26. The two first gears 26 are fixedly connected to the drive shaft 12. The two first gears 26 are respectively set inside the two support seats 15. One end of one support seat 15 is fixedly connected to the motor 16. The drive end of the motor 16 is fixedly connected to the drive shaft 12. The top of the two fixed plates 2 are close to each other and are fixedly connected with the crossbars 20. The inner side of the bottom end of the two crossbars 20 is fixedly connected with the arc welding gun 21. The gap between the square valve body 22 and the tapered tube 23 is welded by the arc welding gun 21.

[0036] Working principle: First, the square valve body 22 is placed in the groove on the positioning seat 11, and the conical tube 23 is placed in the conical groove 27 on the circular seat 18. At this time, the vacuum pump 19 is started to generate a negative pressure effect in the adsorption hole 28 through the annular connecting pipe 24, so that the conical tube 23 can be adsorbed and fixed. Then, the electric push rods 17 on both sides are controlled by the synchronous controller to move the moving upright plate 8 in the direction of approach. Therefore, the moving columns 3 on both sides can move synchronously. Since the moving column 3 is fixedly connected to the circular seat 18, it can move the circular seat 18 and push the conical tube 23 towards the square valve body 22. When the conical tube 23 on one side contacts the square valve body 22, it will push the square valve body 22 to the other side until the conical tubes 23 on both sides contact the two ends of the square valve body 22. Since the axis of the circular seat 18 and the axis of the square valve body 22 are on the same straight line, precise docking can be achieved, avoiding the need to adjust the position back and forth, simplifying the operation and ensuring the efficiency of subsequent welding.

[0037] When the moving column 3 moves, it will move the guide rod 25 synchronously. Since the guide rod 25 on the lower side is fixedly connected to the wire rope 31, the telescopic plate 30 and the pressure block 29 can be pulled by the wire rope 31, and the pressure block 29 can be clamped and fixed from the top of the square valve body 22 to avoid displacement during rotation welding, prevent position displacement, and ensure welding quality.

[0038] Then, the motor 16 is started, which drives the drive shaft 12 to rotate. The drive shaft 12 drives the second gear 13 and the first gear 26 to rotate, which in turn drives the second gear ring 10 and the first gear ring 7 to rotate. The second gear ring 10 and the first gear ring 7 drive the connecting ring 37 and the rotating ring 6 to rotate, respectively. Since the connecting ring 37 is fixedly connected to the positioning seat 11, it can drive the positioning seat 11 to rotate synchronously, thus driving the square valve body 22 and the tapered tube 23 to rotate. At the same time, the arc welding gun 21 is started to weld the gap between the square valve body 22 and the tapered tube 23, so that the distance between the arc welding gun 21 and the weld position is always the same, ensuring that the welding effect is the same at each place, avoiding arc blow, ensuring the quality of weld formation, and the stable arc length can reduce the generation of metal spatter and welding fumes, improve the working environment, reduce the amount of post-weld cleaning, and realize automatic arc welding.

[0039] 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 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 claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A valve welding turntable for instrument fittings, comprising a base (1), characterized in that: The base (1) is provided with a clamping and fixing mechanism, a linkage fixing mechanism and a rotary welding mechanism; The linkage fixing mechanism includes a positioning seat (11), the top of the positioning seat (11) is provided with a square groove for placing a square valve body (22), and the top of the positioning seat (11) is provided with telescopic grooves (33) on both sides of the corresponding groove. The two telescopic grooves (33) are arranged obliquely symmetrically. The inner walls of the two telescopic grooves (33) are slidably connected with telescopic plates (30). The tops of the two telescopic plates (30) are fixedly connected with pressure blocks (29) that contact the top of the square valve body (22). The pressure blocks (29) are used to clamp and fix the square valve body (22). The clamping and fixing mechanism includes a circular seat (18), and there are two circular seats (18). Each of the two circular seats (18) has a conical groove (27) at one end close to each other. The two conical grooves (27) are used to place a conical tube (23). The circular seat (18) moves towards the square valve body (22) and makes the conical tube (23) and the two ends of the square valve body (22) come into close contact, thereby completing the clamping and fixing of the conical tube (23) and the square valve body (22). The clamping and fixing mechanism also includes movable upright plates (8) slidably connected to both sides of the top of the base (1). Movable columns (3) are fixedly connected to one end of each of the two movable upright plates (8) that are close to each other. The two movable columns (3) and two circular seats (18) are rotatably connected respectively. It also includes support seats (15) fixedly connected to the inner side of the movable upright plates (8) at the top of the base (1). Electric push rods (17) are fixedly connected to one end of each of the two support seats (15) that are far apart from each other. The telescopic ends of the two electric push rods (17) are fixedly connected to the two movable upright plates (8) respectively. The linkage fixing mechanism also includes a fixing ring (4) rotatably connected to the outer wall of the moving column (3). Both sides of the outer wall of the two fixing rings (4) are fixedly connected to connecting rods (5). Both sets of connecting rods (5) are fixedly connected to guide rods (25) at one end close to each other. Both sets of guide rods (25) are fixedly connected to limit plates at one end close to each other. The linkage fixing mechanism also includes square holes (35) passing through the telescopic groove (33) at opposite ends. A first pulley group (34) and a second pulley group (36) are fixedly installed on both sides of the inner wall of the two square holes (35). The first pulley group (34) and the second pulley group (36) in each group are arranged vertically. Steel wire ropes (31) are fixedly connected to the bottom ends of the two telescopic plates (30). Springs (32) are symmetrically fixedly connected between each set of telescopic plates (30) and telescopic grooves (33). The steel wire ropes (31) pass through the rollers on the first pulley group (34) and the second pulley group (36). The two steel wire ropes (31) and the two guide rods (25) on the lower side are fixedly connected respectively.

2. The instrument fitting valve welding turntable according to claim 1, characterized in that: The clamping and fixing mechanism also includes adsorption holes (28) passing through the four sides of the inner wall of the conical groove (27). The outer wall of the circular seat (18) is fixedly connected with annular connecting pipes (24) through pipes. The two sets of annular connecting pipes (24) and adsorption holes (28) are connected to each other. The top of the two circular seats (18) is fixedly connected with a vacuum pump (19). The two vacuum pumps (19) and the two annular connecting pipes (24) are connected through pipes.

3. The instrument fitting valve welding turntable according to claim 1, characterized in that: The rotary welding mechanism includes a support plate (14) fixedly connected to the inner side of the support seat (15) at the top of the base (1). The top of each of the two sets of support plates (14) is fixedly connected to a support ring (9). The two support rings (9) are rotatably connected to a second toothed ring (10) at one end close to each other. The inner walls of the two second toothed rings (10) are fixedly connected to a connecting ring (37). The two connecting rings (37) are fixedly connected to a positioning seat (11). The outer diameters of the two second toothed rings (10) are meshed with a second gear (13). The two second gears (13) are fixedly connected to a drive shaft (12). The drive shaft (12) is rotatably connected to the support seat (15).

4. The instrument fitting valve welding turntable according to claim 3, characterized in that: The rotary welding mechanism also includes a rotating ring (6) rotatably connected to the top of the support base (15). The inner walls of the two rotating rings (6) are rotatably connected to fixed disks (2). The two fixed disks (2) and the two moving columns (3) slide through each other. The rotating rings (6) and the connecting rings (37) slide through the outer walls of the guide rod (25). The outer walls of the two rotating rings (6) are fixedly connected to first toothed rings (7). The outer diameters of the two first toothed rings (7) are meshed with first gears (26). The two first gears (26) are fixedly connected to the drive shaft (12). The two first gears (26) are respectively set inside the two support bases (15). One end of one support base (15) is fixedly connected to a motor (16). The drive end of the motor (16) is fixedly connected to the drive shaft (12).

5. The instrument fitting valve welding turntable according to claim 4, characterized in that: The two fixed plates (2) are each fixedly connected to a crossbar (20) at one end close to each other, and an arc welding gun (21) is fixedly connected to the inner side of the bottom end of each of the two crossbars (20).

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