Four-station welding equipment

Abstract

The utility model discloses four-station welding equipment which is used for gate valve seat connection welding and comprises a welding gun executing mechanism and a four-station rotating mechanism, and the four-station rotating mechanism comprises a station switching mechanism and a gate valve clamping mechanism connected to the peripheral wall face of the station switching mechanism. The gate valve clamping mechanism clamps a gate valve, the gate valve located on the left side of the station switching mechanism is located on a to-be-machined station, the other gate valve clamping mechanisms are located on clamping stations, the station switching mechanism drives the gate valve clamping mechanism to rotate in the vertical direction so as to switch the stations, and the welding gun executing mechanism welds the gate valve on the to-be-machined station. The gate valve clamping mechanism comprises a supporting frame connected to the station switching mechanism, a pneumatic rotating platform supported by the supporting frame and a locking mechanism located on the pneumatic rotating platform, the gate valve is placed on the pneumatic rotating platform, the locking mechanism clamps the gate valve, and the pneumatic rotating platform can rotate by 180 degrees in the vertical direction so that valve seats on the two sides of the gate valve can be subjected to connection welding. Four-station welding equipment has the functions of quick clamping and automatic surface changing of the gate valve.

Description

Technical Field

[0001] The utility model relates to a gate valve seat connection welding device, in particular to a high-efficiency four-station welding device. Background Art

[0002] The gate valve can play the role of closing and opening, and when the gate valve is closed, it plays a sealing role through the pressure of the medium. The gate valve has different materials and can be used to open and close a variety of liquids such as water or steam, including various oils or oxidizing media; its applicable pressure range and temperature are relatively wide, and it is not restricted by the flow direction while also providing very good sealing performance. It can be widely used in industries such as tap water, sewage, construction, petroleum, chemical industry, food, medicine, textile, electricity, shipbuilding, metallurgy, and energy systems. The gate valve seat connection welding device of the prior art uses an AC motor to drive the turntable to rotate, and uses an induction switch to sense the position information to realize the switching of the double stations; among them, the two separate welding stations are equipped with a fixed three-jaw chuck. After welding one side of the gate valve, it is necessary to manually change the surface and then perform the reposition welding.

[0003] The existing technology has the following disadvantages: 1. Low efficiency: Because each gate valve requires two manual clamping and two repositioning weldings, the workload of the workers is increased, the welding time of the overall product is long, and the efficiency is low. 2. Inaccurate positioning: Because the repositioning positioning is performed by an induction switch, the positioning accuracy is poor. Due to the limitations of the induction switch, the speed of the repositioning rotation is also limited. 3. Safety issues: Because the chuck is in a vertical direction, there is a risk of falling when manually loading and unloading materials; in addition, because the gate valve is welded on one side and then the other side is manually replaced, there is also a hidden danger of burns when changing the side of the newly welded product. However, due to its wide use and high demand for gate valves, the existing technology has slow production efficiency and safety hazards. Therefore, under the premise of ensuring welding quality, how to improve production efficiency is the top priority.

[0004] Therefore, it is desirable to propose a new four-station welding equipment to overcome the above-mentioned defects. Utility Model Content

[0005] The purpose of the utility model is to provide an efficient four-station welding device with the functions of rapid clamping of gate valves and automatic face changing, so as to realize full-automatic welding of valve seats on both sides of the gate valve.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a four-station welding device for connecting and welding valve seats of multiple gate valves, the four-station welding device comprising a longitudinal workbench and a welding gun actuator and a four-station rotary mechanism located on the workbench, the welding gun actuator being located on the longitudinal left side of the four-station rotary mechanism. The four-station rotary mechanism comprises a station switching mechanism disposed on the workbench and four gate valve clamping mechanisms connected to the station switching mechanism, the four gate valve clamping mechanisms being used to clamp the gate valves and being respectively connected to the walls around the station switching mechanism, wherein the gate valve clamping mechanism located on the longitudinal left side of the station switching mechanism is in a waiting position, and the remaining gate valve clamping mechanisms are in a clamping position, the station switching mechanism drives the gate valve clamping mechanism to rotate vertically to switch the above positions, and the welding gun actuator performs welding operations on the gate valves on the gate valve clamping mechanisms in the waiting position. The gate valve clamping mechanism includes an L-shaped support frame connected to the workstation switching mechanism, a pneumatic rotating platform supported by the support frame, and a locking mechanism located on the pneumatic rotating platform. The gate valve is placed on the pneumatic rotating platform, and the locking mechanism clamps or releases the gate valve. The pneumatic rotating platform can rotate 180° vertically so that the valve seats on both longitudinal sides of the gate valve can be connected and welded.

[0007] In a preferred embodiment, the support frame is provided with a vertical fixing seat connected to the station switching mechanism and a horizontal supporting seat extending outward from the lower end of the fixing seat, and the pneumatic rotating platform is provided on the upper surface of the supporting seat.

[0008] In a preferred embodiment, the gate valve clamping mechanism includes a gate valve face changing mechanism located below the support seat, the gate valve face changing mechanism is provided with a linearly extending slide rail, a slider moving along the slide rail, a driven shaft extending vertically and a cylinder connected to the slider, the upper end of the driven shaft is connected to the rotation center of the pneumatic rotating platform, and the lower end of the driven shaft is engaged with the slider, the cylinder drives the slider to slide along the slide rail, and then drives the pneumatic rotating platform to rotate vertically through the driven shaft.

[0009] In a preferred embodiment, the gate valve clamping mechanism includes two locking mechanisms located on both sides of the gate valve, and the locking mechanism is provided with a rotating cylinder located on the pneumatic rotating platform and a guide rail driven by the rotating cylinder. The rotating cylinder drives the guide rail to rotate to abut against or disengage from the outer surface of the gate valve, thereby clamping or releasing the gate valve.

[0010] In a preferred embodiment, the station switching mechanism includes a base and a rotating body located above the base, the base drives the rotating body to rotate vertically, and the four gate valve clamping mechanisms are respectively connected to the walls around the rotating body.

[0011] In a preferred embodiment, the base is a cam divider having eight gears, and each time the base rotates two gears, the station switching mechanism completes one station switching.

[0012] In a preferred embodiment, the base is provided with an output shaft extending vertically, an input shaft engaged with the output shaft, and a drive motor driving the input shaft, the input shaft has a conjugate cam vertically engaged with the lower end of the output shaft, the conjugate cam has a curved segment that drives the output shaft to rotate and a straight segment that makes the output shaft stationary, so that when the input shaft rotates one circle, the output shaft rotates one gear.

[0013] In a preferred embodiment, the base is provided with a dividing plate connected to the upper end of the output shaft, and the rotating body is provided with a bottom wall connected to the dividing plate. Each time the input shaft rotates one circle, the dividing plate drives the bottom wall to rotate one gear.

[0014] In a preferred embodiment, the rotating body is provided with side walls extending upward from the four sides of the bottom wall, and the gate valve clamping mechanism is located on the side walls.

[0015] In a preferred embodiment, the welding gun actuator is provided with a sliding bracket located on a workbench, a servo bracket connected to the sliding bracket, and a welding gun fixed on the servo bracket, wherein the servo bracket moves longitudinally on the sliding bracket and drives the welding gun to rotate in a plane perpendicular to the longitudinal direction.

[0016] Compared with the prior art, the present invention has the following beneficial effects: the gate valve clamping mechanism includes an L-shaped support frame connected to a station switching mechanism, a pneumatic rotary platform supported by the support frame, and a locking mechanism located on the pneumatic rotary platform. The gate valve is placed on the pneumatic rotary platform, and the locking mechanism clamps or releases the gate valve. The pneumatic rotary platform can rotate 180° vertically to allow connection welding of the valve seats on both longitudinal sides of the gate valve. For the connection welding of the valve seats on both sides of a 2-4 inch universal gate valve, this four-station welding equipment has the functions of rapid assembly and positioning of the gate valve, rapid position change, and automatic face change. It can complete the fully automatic tungsten inert gas arc welding of the valve seats on both sides of the inner cavity, greatly improving the efficiency of the gate valve seat connection welding, improving the accuracy of the equipment, ensuring the stability and consistency of the welding, and improving the safety of production personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a three-dimensional schematic diagram of a four-station welding device in a preferred embodiment of the present invention.

[0018] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the four-station welding equipment from another angle is shown.

[0019] Figure 3 yes Figure 1 The three-dimensional schematic diagram of the four-station rotary mechanism in the four-station welding equipment shown.

[0020] Figure 4 yes Figure 3 The three-dimensional schematic diagram of the base in the four-station rotary mechanism shown.

[0021] Figure 5 yes Figure 3 The three-dimensional schematic diagram of the gate valve clamping mechanism in the four-position rotary mechanism shown.

[0022] Figure 6 yes Figure 5 A three-dimensional schematic diagram of the gate valve clamping mechanism from another angle is shown.

[0023] Figure 7 yes Figure 5 The three-dimensional schematic diagram of the gate valve clamping mechanism shown is another angle. DETAILED DESCRIPTION

[0024] See also Figures 1 to 7 As shown, a preferred embodiment of the present invention discloses a four-station welding apparatus 100 for welding the valve seats 301 of multiple gate valves 300. The gate valves 300 have valve seats 301 (also known as gate valve seat rings) located symmetrically on either side of their inner cavity. The four-station welding apparatus 100 facilitates rapid assembly, positioning, rapid position change, and automatic face-changing of the gate valves 300, thereby enabling fully automatic tungsten inert gas arc welding of the valve seats 301 on both sides of their inner cavity.

[0025] See also Figure 1 and Figure 2 As shown, the four-station welding equipment 100 includes a longitudinally elongated workbench 110, a welding gun actuator 120 and a four-station rotary mechanism 200 located on the workbench 110, a TIG welding power supply 130 and a control cabinet 140 positioned adjacent to the welding gun actuator 120. The workbench 110 includes a first workbench 111 located on the left side in the longitudinal direction and a second workbench 112 located on the right side in the longitudinal direction. The welding gun actuator 120 is located on the first workbench 111, and the four-station rotary mechanism 200 is located on the second workbench 112. That is, the welding gun actuator 120 is located on the longitudinal left side of the four-station rotary mechanism 200.

[0026] The TIG welding power supply 130 is positioned adjacent to the first workbench 111 and electrically connected to the welding gun actuator 120 to power the welding gun actuator 120 during welding operations. The control cabinet 140 is located on the same side of the workbench 110 as the TIG welding power supply 130 and adjacent to the second workbench 112. The control cabinet 140 is electrically connected to both the welding gun actuator 120 and the four-station rotary mechanism 200 to control welding operations of the welding gun actuator 120 and station switching and gate valve reversal of the four-station rotary mechanism 200. In this embodiment, the control cabinet 140 is also connected to a display screen 141 to facilitate display and control of the equipment's operating status.

[0027] The welding gun actuator 120 includes a sliding bracket 121 positioned on the first workbench 111 of the workbench 110, a servo bracket 122 connected to the sliding bracket 121, and a welding gun 123 fixed to the servo bracket 122. The servo bracket 122 moves longitudinally on the sliding bracket 121 and drives the welding gun 123 to rotate in a plane perpendicular to the longitudinal direction. In this embodiment, because the valve seat 301 has a 5° angle, the welding gun 123 performs interpolated motion along the horizontal Z axis (longitudinal) and the rotation axis (perpendicular to the longitudinal plane) to ensure that the tungsten electrode of the welding gun 123 and the weld seam of the valve seat 301 are aligned. The height of the welding gun 123 also utilizes the AVC function of the TIG to achieve arc voltage tracking during the welding process, ensuring that the tungsten electrode is always aligned with the height of the gate valve 300, thereby ensuring consistent penetration depth. At the same time, according to the different sizes of the gate valve 300, the control cabinet 140 can store multiple programs according to the model of the gate valve 300, so that each program corresponds to a weld trajectory of the gate valve 300, thereby facilitating the adjustment of the equipment position when replacing the gate valve 300.

[0028] See also Figure 3 As shown, the four-station rotary mechanism 200 includes a station switching mechanism 10 disposed on the second workbench 112 of the workbench 110 and four gate valve clamping mechanisms 20 connected to the station switching mechanism 10. The four gate valve clamping mechanisms 20 are used to clamp the gate valve 300 and are respectively connected to the walls surrounding the station switching mechanism 10. The gate valve clamping mechanism 20 located on the longitudinal left side of the station switching mechanism 10 is in the processing station, while the remaining ones are in the clamping stations; that is, one station is for welding, while the others are for assembly. The station switching mechanism 10 drives the gate valve clamping mechanism 20 to rotate vertically to switch between the aforementioned stations, and the welding gun actuator 120 performs welding operations on the gate valve 300 on the gate valve clamping mechanism 20 in the processing station.

[0029] Combine Figure 4As shown, the workstation switching mechanism 10 includes a base 30 and a rotating body 40 located above the base 30. The base 30 drives the rotating body 40 to rotate vertically. The four gate valve clamping mechanisms 20 are connected to the walls surrounding the rotating body 40. In this embodiment, the base 30 is a cam divider, which offers advantages such as high speed, high precision, and stable performance. The base 30 has eight gear positions, and the workstation switching mechanism 10 completes a workstation switch every time the base 30 rotates two gear positions.

[0030] Specifically, the base 30 is equipped with a vertically extending output shaft 31, an input shaft 32 meshing with the lower end of the output shaft 31, a drive motor 33 driving the input shaft 32, and a graduated plate 34 connected to the upper end of the output shaft 31. The input shaft 32 has a conjugate cam (not shown) that meshes vertically with the lower end of the output shaft 31. The conjugate cam has curved and straight segments. When the drive motor 33 rotates the input shaft 32, the curved segment rotates the output shaft 31, driving the graduated plate 34 to rotate, while the straight segment keeps the output shaft 31 and the graduated plate 34 stationary and locked in place. During operation, each rotation of the input shaft 32 causes the output shaft 31 to rotate the graduated plate 34 one gear.

[0031] The rotating body 40 comprises a bottom wall 41 connected to the indexing plate 34 and side walls 42 extending upward from the periphery of the bottom wall 41. Adjacent side walls 42 are perpendicular to each other, and the four gate valve clamping mechanisms 20 are located on corresponding side walls 42. With each rotation of the input shaft 32, the indexing plate 34 drives the bottom wall 41 to rotate one gear position. Furthermore, with each two rotations of the input shaft 32, the station switching mechanism 10 completes one station switch.

[0032] See also Figures 5 to 7 As shown, the gate valve clamping mechanism 20 includes an L-shaped support frame 50 connected to the side wall 42 of the rotating body 40 of the work-station switching mechanism 10, a pneumatic rotating platform 60 supported by the support frame 50, and a locking mechanism 70 located on the pneumatic rotating platform 60. The gate valve 300 is placed on the pneumatic rotating platform 60. The support frame 50 is provided with a vertical fixing seat 51 connected to the side wall 42 of the rotating body 40 of the work-station switching mechanism 10, and a horizontal supporting seat 52 extending outward from the lower end of the fixing seat 51. The pneumatic rotating platform 60 is disposed on the upper surface of the supporting seat 52.

[0033] The pneumatic rotating platform 60 has a rotation center, and the support frame 50 is provided with a positioning fixture hole 53 located at the rotation center. When the gate valve 300 is placed on the pneumatic rotating platform 60, its center is aligned and installed in the positioning fixture hole 53, thereby achieving rapid positioning of different gate valves. At the same time, it can be concentric with the rotation center according to different gate valves and fixed for safer installation. The pneumatic rotating platform 60 of the gate valve clamping mechanism 20 includes a gate valve face-changing mechanism located below the support seat 52. The gate valve face-changing mechanism includes a linearly extending slide rail 61, a slider 62 that moves along the slide rail 61, a driven shaft 63 extending vertically, and a cylinder 64 connected to the slider 62. The upper end of the driven shaft 63 is connected to the rotation center of the pneumatic rotating platform 60, and the gear at the lower end of the driven shaft 63 is meshed with the slider 62. The cylinder 64 drives the slider 62 to slide along the slide rail 61, thereby driving the pneumatic rotating platform 60 to rotate vertically through the driven shaft 63.

[0034] At the same time, the sliding stroke of the slide 62 driven by the cylinder 64 precisely causes the pneumatic rotary platform 60 to rotate 180° vertically. The gate valve face-changing mechanism achieves the welding of the two valve seats 301 through a single clamping of the gate valve 300, thus completing the fully automatic tungsten inert gas arc welding of the valve seats 301 on both sides of the inner cavity of the gate valve 300. As a result, the face-changing function of the gate valve face-changing mechanism has the advantages of high speed and accurate positioning.

[0035] The gate valve clamping mechanism 20 includes two locking mechanisms 70 located on either side of the gate valve 300. These locking mechanisms 70 are used to clamp or release the gate valve 300 and are equipped with a rotary cylinder 71 located on a pneumatic rotary platform 60 and a guide rib 72 driven by the rotary cylinder 71. The rotary cylinder 71 drives the guide rib 72 to rotate against or disengage from the outer surface of the gate valve 300, thereby quickly clamping or releasing the gate valve 300 and significantly improving installation efficiency. Furthermore, the pneumatic rotary platform 60 can rotate 180° vertically, allowing for welding of the valve seats 301 on both longitudinal sides of the gate valve 300, thereby achieving fast and secure clamping.

[0036] In the present invention, the gate valve clamping mechanism 20 includes an L-shaped support frame 50 connected to the workstation switching mechanism 10, a pneumatic rotary platform 60 supported by the support frame 50, and a locking mechanism 70 located on the pneumatic rotary platform 60. The gate valve 300 is placed on the pneumatic rotary platform 60, and the locking mechanism 70 clamps or releases the gate valve 300. The pneumatic rotary platform 60 can rotate 180 degrees vertically so that the valve seats 301 on both longitudinal sides of the gate valve 300 can be connected and welded. For the connection welding of the valve seats 301 on both sides of a 2-4 inch universal gate valve 301, the four-station welding equipment 100 has the functions of rapid assembly and positioning, rapid position change, and automatic face change of the gate valve 300; it can complete the fully automatic tungsten inert gas arc welding of the valve seats 301 on both sides of its inner cavity, greatly improving the efficiency of the gate valve seat connection welding, improving the accuracy of the equipment, ensuring the stability and consistency of the welding, and improving the safety of production personnel.

[0037] In summary, the above are merely preferred embodiments of the present invention and should not be used to limit the scope of the present invention. That is, any simple equivalent changes and modifications made according to the claims and description of the present invention should still fall within the scope of the present invention patent.

Claims

1. A four-station welding equipment for connecting and welding valve seats of multiple gate valves, wherein the four-station welding equipment comprises a longitudinal workbench and a welding gun actuator and a four-station rotary mechanism located on the workbench, wherein the welding gun actuator is located on the longitudinal left side of the four-station rotary mechanism, and the four-station rotary mechanism comprises a station switching mechanism arranged on the workbench and four gate valve clamping mechanisms connected to the station switching mechanism, the four gate valve clamping mechanisms being used to clamp the gate valves and being respectively connected to the walls around the station switching mechanism, wherein the gate valve clamping mechanism located on the longitudinal left side of the station switching mechanism is at a station to be processed, and the rest are at a clamping station, the station switching mechanism drives the gate valve clamping mechanism to rotate vertically to switch the above-mentioned stations, and the welding gun actuator performs welding operations on the gate valves on the gate valve clamping mechanism at the station to be processed; it is characterized in that: The gate valve clamping mechanism includes an L-shaped support frame connected to the workstation switching mechanism, a pneumatic rotating platform supported by the support frame, and a locking mechanism located on the pneumatic rotating platform. The gate valve is placed on the pneumatic rotating platform, and the locking mechanism clamps or releases the gate valve. The pneumatic rotating platform can rotate 180° vertically so that the valve seats on both longitudinal sides of the gate valve can be connected and welded.

2. The four-station welding equipment according to claim 1, characterized in that: The support frame is provided with a vertical fixing seat connected to the station switching mechanism and a horizontal supporting seat extending outward from the lower end of the fixing seat, and the pneumatic rotating platform is arranged on the upper surface of the supporting seat.

3. The four-station welding equipment according to claim 2, characterized in that: The gate valve clamping mechanism includes a gate valve face changing mechanism located below the support seat, the gate valve face changing mechanism is provided with a linearly extending slide rail, a slider moving along the slide rail, a driven shaft extending vertically and a cylinder connected to the slider, the upper end of the driven shaft is connected to the rotation center of the pneumatic rotating platform, and the lower end of the driven shaft is engaged with the slider, the cylinder drives the slider to slide along the slide rail, and then drives the pneumatic rotating platform to rotate vertically through the driven shaft.

4. The four-station welding equipment according to claim 1, characterized in that: The gate valve clamping mechanism includes two locking mechanisms located on both sides of the gate valve. The locking mechanism is provided with a rotating cylinder located on the pneumatic rotating platform and a guide rail driven by the rotating cylinder. The rotating cylinder drives the guide rail to rotate to abut against or disengage from the outer surface of the gate valve, thereby clamping or releasing the gate valve.

5. The four-station welding equipment according to claim 1, characterized in that: The station switching mechanism includes a base and a rotating body located above the base. The base drives the rotating body to rotate vertically. The four gate valve clamping mechanisms are respectively connected to the walls around the rotating body.

6. The four-station welding equipment according to claim 5, characterized in that: The base is a cam divider and has eight gears, and every time the base rotates two gears, the workstation switching mechanism completes one workstation switching.

7. The four-station welding equipment according to claim 6, characterized in that: The base is provided with an output shaft extending vertically, an input shaft engaged with the output shaft and a driving motor driving the input shaft. The input shaft has a conjugate cam vertically engaged with the lower end of the output shaft. The conjugate cam has a curved segment that drives the output shaft to rotate and a straight segment that makes the output shaft stationary. When the input shaft rotates one circle, the output shaft rotates one gear.

8. The four-station welding equipment according to claim 7, characterized in that: The base is provided with a dividing plate connected to the upper end of the output shaft, and the rotating body is provided with a bottom wall connected to the dividing plate. When the input shaft rotates one circle, the dividing plate drives the bottom wall to rotate one gear.

9. The four-station welding equipment according to claim 8, characterized in that: The rotating body is provided with side walls extending upward from the four sides of the bottom wall, and the gate valve clamping mechanism is located on the side walls.

10. The four-station welding equipment according to claim 1, characterized in that: The welding gun actuator includes a sliding bracket located on a workbench, a servo bracket connected to the sliding bracket, and a welding gun fixed to the servo bracket. The servo bracket moves longitudinally on the sliding bracket and drives the welding gun to rotate in a plane perpendicular to the longitudinal direction.

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