Valve body machining and welding device and using method thereof

Abstract

The invention belongs to the technical field of valve body machining, particularly relates to a valve body machining and welding device and a use method thereof, and aims to solve the problem that the temperature of a welding point and the temperature of other parts can generate large deviation, so that a valve body is easily influenced by temperature stress during welding, and the machining and welding quality of the valve body is influenced. A mounting groove is formed in the top of the machining pedestal, and a fixing support is fixedly connected to the outer wall of one side of the machining pedestal. And the machining fixing module is arranged in the mounting groove. According to the valve body machining and welding device and the using method thereof, the valve body machining and welding effect is improved, during welding operation, the device can preheat an unwelded part, meanwhile, the welded part is subjected to heat preservation, and therefore the temperature difference between the temperature of a welding point and the temperature of the unwelded part and the temperature difference between the temperature of the welding point and the temperature of the welded part are reduced, and the welding quality is improved. Therefore, the influence of temperature stress on welding is reduced, and the welding quality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of valve body processing, and particularly relates to a valve body processing and welding device and a using method thereof. Background Art

[0002] The valve body is a main component in a valve. A valve is a device for controlling the direction, pressure, and flow rate of a fluid, enabling the liquid, gas, or powder medium in a pipeline and equipment to flow or stop. At the same time, the valve body is the main pressure-bearing component of the valve. As the core structure of a fluid control system, its design and manufacturing quality directly affect the sealing performance, strength, and service life of the valve.

[0003] Valve body processing and welding is a core process link in valve manufacturing, mainly used for connecting valve body components, repairing defects, and enhancing the performance of key parts.

[0004] The end of an existing valve body usually needs to be welded with a flange. When welding, the temperature of the welding point is higher than that of other parts to be welded or already welded parts. Therefore, during welding, there will be a large deviation in temperature between the welding point and other parts, resulting in the valve body being easily affected by temperature stress during welding, thereby affecting the quality of valve body processing and welding. Summary of the Invention

[0005] The present invention discloses a valve body processing and welding device and a using method thereof, aiming to solve the technical problem that there is a large deviation in temperature between the welding point and other parts in the background art, resulting in the valve body being easily affected by temperature stress during welding, thereby affecting the quality of valve body processing and welding.

[0006] A valve body processing and welding device proposed by the present invention includes: A processing pedestal, on the top of which an installation groove is opened, and a fixed bracket is fixedly connected to the outer wall of one side of the processing pedestal; A processing and fixing module, which is arranged inside the installation groove, and is used for fixing the flange and the valve body and ensuring that they are on the same axis; A welding valve body part, which is located above the processing pedestal, and the welding valve body part includes a valve body part and a flange; A stress welding module, which is located on the fixed bracket, and is used for controlling the temperature of the un-welded and already welded parts, thereby reducing the temperature difference between the welding point temperature and the un-welded parts and already welded parts; A welding gun body, which is arranged outside the welding valve body part; The stress welding module includes: A lower annular rail, which is located outside the processing pedestal, and an upper annular rail is arranged above the lower annular rail. Fixed tooth rings are fixedly connected to the inner walls of the lower annular rail and the upper annular rail; Two connecting brackets are respectively arranged on the lower annular rail and the upper annular rail. Electric push rods are fixedly connected to both of the two connecting brackets, and mounting frames are fixedly connected to the output ends of both of the two electric push rods; Two guiding brackets are respectively arranged on the lower annular rail and the upper annular rail. Electric rods are fixedly connected to both of the two guiding brackets, and fixed frames are fixedly connected to the output ends of both of the two electric rods; Two winding wheels are respectively arranged on the two fixed frames. A preheating soft frame belt and a heat preservation soft frame belt are respectively arranged on the two winding wheels, and one ends of the preheating soft frame belt and the heat preservation soft frame belt are respectively arranged on the two mounting frames.

[0007] In a preferred solution, the stress welding module further includes: An arc-shaped rail seat is arranged on the top of the fixed bracket. An arc-shaped sliding frame is arranged on the arc-shaped rail seat, and the lower annular rail is arranged on the arc-shaped sliding frame; Two mounting vertical rods are respectively arranged on the arc-shaped rail seat and the arc-shaped sliding frame, and a same telescopic oil cylinder is arranged on the outer walls of the two mounting vertical rods.

[0008] In a preferred solution, the stress welding module further includes: Two electric lifting rods are fixedly connected to the arc-shaped sliding frame. The output ends of the two electric lifting rods are fixedly connected to a same lifting frame, and the upper annular rail is arranged on the lifting frame; Two winding motors are respectively arranged on the two fixed frames, and the output shafts of the two winding motors are respectively connected to the tops of the two winding wheels through couplings.

[0009] In a preferred solution, the stress welding module further includes: Two guide wheels are respectively arranged on the two fixed frames, and the outer walls of the two guide wheels are respectively in contact with the outer walls of the preheating soft frame belt and the heat preservation soft frame belt; Two heating power supply components are respectively arranged inside the two mounting frames. Two heating circuits are arranged on both of the two heating power supply components, and the four heating circuits are respectively arranged on the preheating soft frame belt and the heat preservation soft frame belt.

[0010] In a preferred solution, the stress welding module further includes: A plurality of heating rods are respectively arranged on the preheating soft frame belt and the heat preservation soft frame belt, and the plurality of heating rods are respectively connected to the four heating circuits; Two general motors are respectively arranged on two guiding brackets. The output shafts of the two general motors are both connected with gear parts through couplings, and the two gear parts are respectively meshed with two fixed toothed rings.

[0011] In a preferred embodiment, the processing and fixing module includes: A servo motor is arranged at the bottom of the installation groove; A fixed disk seat is arranged on the inner wall of the installation groove. The fixed disk seat is located above the servo motor. Three movable guide grooves are opened at the top of the fixed disk seat; A threaded flat plate is connected with the output shaft of the servo motor through a coupling. The threaded flat plate is located inside the fixed disk seat. Three movable guide seats are arranged on the threaded flat plate, and the outer walls of the three movable guide seats are respectively in contact with the inner walls of the three movable guide grooves.

[0012] In a preferred embodiment, the processing and fixing module further includes: Three flange fixing parts are respectively arranged on the three movable guide seats; Three fixed supports are respectively arranged on the three movable guide seats. Three adjusting guide openings and threaded holes are opened on the three fixed supports, and the three threaded holes are respectively communicated with the three adjusting guide openings; Three adjusting guide rods are respectively arranged on the inner walls of the three adjusting guide openings. One ends of the three adjusting guide rods are all provided with valve body fixing parts; Three locking screws are respectively arranged inside the three threaded holes.

[0013] In a preferred embodiment, a welding guide rail is fixedly connected to the top of the arc-shaped sliding frame. A welding toothed ring is arranged on the welding guide rail. A welding bracket is fixedly connected to the inner wall of the welding toothed ring. An electric telescopic rod is fixedly connected to the welding bracket. The output end of the electric telescopic rod is fixedly connected to a welding torch bracket. A welding torch body is arranged on the welding torch bracket. And a driving motor is fixedly connected to the top of the arc-shaped sliding frame. The output shaft of the driving motor is connected with a driving gear through a coupling, and the driving gear is meshed with the welding toothed ring.

[0014] A method for processing and welding a valve body, using a valve body processing and welding device as described above, includes the following steps: Step 1: Place the welded valve body part on the processing pedestal, and fix the valve body part and the flange of the welded valve body part through the processing and fixing module; Step 2: During the welding operation, the electric telescopic rod runs to adjust the position of the welding torch body to reach the welding point. At this time, the driving motor and the welding torch body run and perform welding; Step 3: During the welding process, the stress welding module operates to preheat the un-welded parts and keep the welded parts warm as the welding progresses until the welding is completed.

[0015] As can be seen from the above, a valve body processing and welding device provided by the present invention has the operation of improving the valve body processing and welding effect. During the welding operation, the device can preheat the un-welded parts and keep the welded parts warm at the same time, thereby reducing the temperature difference between the welding point temperature and the un-welded parts and the welded parts, and further reducing the influence of temperature stress on welding and improving the welding quality. Brief Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the overall structure of a valve body processing and welding device proposed by the present invention; Figure 2 It is a schematic diagram of the overall side view structure of a valve body processing and welding device proposed by the present invention; Figure 3 It is a schematic diagram of the overall top view structure of a valve body processing and welding device proposed by the present invention; Figure 4 It is a schematic diagram of the stress welding module structure of a valve body processing and welding device proposed by the present invention; Figure 5 It is a schematic diagram of the combined structure of the heat preservation soft frame belt and the preheating soft frame belt of a valve body processing and welding device proposed by the present invention; Figure 6 It is a schematic diagram of the combined structure of the guide wheel and the winding wheel of a valve body processing and welding device proposed by the present invention; Figure 7 It is a schematic diagram of the combined structure of the welding tooth ring and the driving motor of a valve body processing and welding device proposed by the present invention; Figure 8 It is a schematic diagram of the processing and fixing module structure of a valve body processing and welding device proposed by the present invention; Figure 9 It is a schematic diagram of the combined structure of the movable guide seat and the threaded flat plate of a valve body processing and welding device proposed by the present invention; Figure 10 It is a schematic diagram of the split structure of the adjusting guide rod and the fixed support of a valve body processing and welding device proposed by the present invention.

[0017] In the figure: 1. Processing pedestal; 2. Welding guide rail; 3. Welding valve body part; 4. Stress welding module; 401. Upper annular rail; 402. Fixed gear ring; 403. Connecting bracket; 404. Electric push rod; 405. Lower annular rail; 406. Electric rod; 407. Guiding bracket; 408. Installation vertical rod; 409. Arc rail seat; 410. Arc sliding frame; 411. Electric lifting rod; 412. Lifting frame; 413. Heat preservation soft frame belt; 414. Preheating soft frame belt; 415. Telescopic oil cylinder; 416. Heating rod; 417. Heating circuit; 418. Heating power supply part; 419. Installation frame; 420. Guide wheel; 421. Winding wheel; 422. General motor; 423. Gear part; 424. Fixed frame; 425. Winding motor; 5. Fixed bracket; 6. Processing and fixing module; 601. Servo motor; 602. Fixed disk seat; 603. Movable guide groove; 604. Flange fixing part; 605. Movable guide seat; 606. Threaded flat plate; 607. Locking screw; 608. Adjusting guide port; 609. Valve body fixing part; 610. Adjusting guide rod; 611. Threaded hole; 612. Fixed support; 7. Welding bracket; 8. Welding gun body; 9. Welding gun support; 10. Electric telescopic rod; 11. Welding gear ring; 12. Driving motor; 13. Driving gear; 14. Installation groove. Detailed implementation mode

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0019] A valve body processing and welding device disclosed by the present invention is mainly applied to scenarios where there is a large deviation in temperature between the welding point and other parts, resulting in the valve body being easily affected by temperature stress during welding, thereby affecting the processing and welding quality of the valve body.

[0020] Refer to Figures 1-10 , a valve body processing and welding device, comprising: Processing pedestal 1, an installation groove 14 is opened at the top of the processing pedestal 1, and a fixed bracket 5 is fixedly connected to the outer wall of one side of the processing pedestal 1; Processing and fixing module 6, the processing and fixing module 6 is arranged inside the installation groove 14, and the processing and fixing module 6 is used to fix the flange and the valve body and ensure that they are on the same axis; Welding valve body part 3, the welding valve body part 3 is located above the processing pedestal 1, and the welding valve body part 3 includes a valve body part and a flange; Stress welding module 4, the stress welding module 4 is located on the fixed bracket 5, and the stress welding module 4 is used to control the temperature of the un-welded and welded parts, thereby reducing the temperature difference between the welding point temperature and the un-welded and welded parts; The welding gun body 8 is arranged outside the welded valve body part 3; The stress welding module 4 includes: The lower annular rail 405 is located outside the processing pedestal 1. An upper annular rail 401 is arranged above the lower annular rail 405. Fixed toothed rings 402 are fixedly connected to the inner walls of both the lower annular rail 405 and the upper annular rail 401; Two connecting brackets 403 are respectively arranged on the lower annular rail 405 and the upper annular rail 401. Electric push rods 404 are fixedly connected to both of the two connecting brackets 403. The output ends of both the two electric push rods 404 are fixedly connected with mounting frames 419; Two guiding brackets 407 are respectively arranged on the lower annular rail 405 and the upper annular rail 401. Electric rods 406 are fixedly connected to both of the two guiding brackets 407. The output ends of both the two electric rods 406 are fixedly connected with fixed frames 424; Two winding wheels 421 are respectively arranged on the two fixed frames 424. A preheating soft frame belt 414 and a heat preservation soft frame belt 413 are respectively arranged on the two winding wheels 421. One ends of the preheating soft frame belt 414 and the heat preservation soft frame belt 413 are respectively arranged on the two mounting frames 419.

[0021] Refer to Figures 1-6 , in a preferred embodiment, the stress welding module 4 further includes: The arc-shaped rail seat 409 is arranged on the top of the fixed bracket 5. An arc-shaped sliding frame 410 is arranged on the arc-shaped rail seat 409. The lower annular rail 405 is arranged on the arc-shaped sliding frame 410; Two mounting vertical rods 408 are respectively arranged on the arc-shaped rail seat 409 and the arc-shaped sliding frame 410. A same telescopic oil cylinder 415 is arranged on the outer walls of the two mounting vertical rods 408.

[0022] In the present invention, the stress welding module 4 further includes: Two electric lifting rods 411 are fixedly connected to the arc-shaped sliding frame 410. The output ends of the two electric lifting rods 411 are fixedly connected with a same lifting frame 412. The upper annular rail 401 is arranged on the lifting frame 412; Two winding motors 425 are respectively arranged on the two fixed frames 424. The output shafts of the two winding motors 425 are respectively connected to the tops of the two winding wheels 421 through couplings.

[0023] In the present invention, the stress welding module 4 further includes: Two guide wheels 420 are respectively arranged on two fixed frames 424, and the outer walls of the two guide wheels 420 are respectively in contact with the outer walls of the preheating soft frame belt 414 and the heat preservation soft frame belt 413; Two heating power supply components 418 are respectively arranged inside two mounting frames 419. Two heating circuits 417 are arranged on each of the two heating power supply components 418, and the four heating circuits 417 are respectively arranged on the preheating soft frame belt 414 and the heat preservation soft frame belt 413.

[0024] In the present invention, the stress welding module 4 further includes: A plurality of heating rods 416 are respectively arranged on the preheating soft frame belt 414 and the heat preservation soft frame belt 413, and the plurality of heating rods 416 are respectively connected to the four heating circuits 417; Two universal motors 422 are respectively arranged on two guiding brackets 407. The output shafts of the two universal motors 422 are both connected with gear parts 423 through couplings, and the two gear parts 423 are respectively meshed with two fixed toothed rings 402.

[0025] Specifically, before welding, the electric push rod 404 located on the lower annular rail 405 drives the mounting frame 419 to move so that it contacts the welding valve body part 3. At the same time, the electric member 406 on the lower annular rail 405 operates, so that the fixed frame 424 drives the guide wheel 420 to move, and further makes the preheating soft frame belt 414 contact the valve body part. After that, the universal motor 422 on the lower annular rail 405 operates, so that the guiding bracket 407 and the fixed frame 424 move. At the same time, the winding motor 425 operates to relax the preheating soft frame belt 414 until the preheating soft frame belt 414 is circumferentially arranged at the un-welded part. At this time, the heating power supply component 418 is started, and the heating rods 416 are heated through the heating circuits 417 to preheat the un-welded part; During welding, the universal motor 422 and the winding motor 425 on the lower annular rail 405 reverse, so that the winding wheel 421 winds the preheating soft frame belt 414, making the un-welded part gradually exposed. At the same time, the welding gun body 8 welds the exposed part; As the welded part increases, the electric lifting rod 411 drives the upper annular rail 401 to descend, so that the heat preservation soft frame belt 413 on the upper annular rail 401 and the preheating soft frame belt 414 are on the same horizontal plane. After that, the electric push rod 404 and the electric member 406 on the upper annular rail 401 operate, so that the mounting frame 419 and the fixed frame 424 on the upper annular rail 401 move until the mounting frame 419 and the heat preservation soft frame belt 413 contact the welding valve body part 3. After that, the universal motor 422 and the winding motor 425 on the upper annular rail 401 operate, so that the heat preservation soft frame belt 413 is relaxed, covers the welded part, and performs heat preservation heating; When the circumferential welding reaches the end part, the telescopic oil cylinder 415 operates, causing the arc-shaped sliding frame 410 to move on the arc-shaped rail seat 409, thereby driving the upper annular rail 401 and the lower annular rail 405 to move, so that the preheating soft frame belt 414 and the heat preservation soft frame belt 413 are deflected as a whole by a certain distance to expose the unwelded part at the end until the welding is completed; In a specific application scenario, the stress welding module 4 is applicable to the valve body processing and welding link, that is, the stress welding module 4 can preheat the unwelded part during welding and simultaneously keep the welded part warm, thereby reducing the temperature difference between the welding point temperature and the unwelded part and the welded part, and further reducing the influence of temperature stress on welding, improving the welding quality. Moreover, during preheating and heat preservation, the device can gradually reduce the preheating part range and gradually increase the heat preservation part range as the welding progresses to ensure the preheating and heat preservation effects of the device during welding, further enhancing the use effect of the device. At the same time, when in use, the device can be adjusted according to the sizes of the valve body parts and the flange plates to improve the applicability of the device; It should be noted that when the circumferential welding reaches the end part, the device can deflect the positions of the preheating soft frame belt 414 and the heat preservation soft frame belt 413 as a whole by a certain distance through the telescopic oil cylinder 415 to expose the unwelded part at the end, avoiding the device from obstructing the welding gun body 8 to ensure the completion of the welding operation.

[0026] Refer to Figure 3 and Figures 8-10 , in a preferred embodiment, the processing and fixing module 6 includes: A servo motor 601, which is arranged at the bottom of the installation groove 14; A fixed disk seat 602, which is arranged on the inner wall of the installation groove 14. The fixed disk seat 602 is located above the servo motor 601, and three movable guide grooves 603 are opened at the top of the fixed disk seat 602; A threaded flat plate 606, which is connected to the output shaft of the servo motor 601 through a coupling. The threaded flat plate 606 is located inside the fixed disk seat 602, and three movable guide seats 605 are arranged on the threaded flat plate 606. The outer walls of the three movable guide seats 605 are respectively in contact with the inner walls of the three movable guide grooves 603. [[ID=:19]]

[0027] In the present invention, the processing and fixing module 6 further includes: Three flange fixing parts 604, which are respectively arranged on the three movable guide seats 605; Three fixed supports 612, which are respectively arranged on the three movable guide seats 605. Three adjusting guide openings 608 and threaded holes 611 are opened on the three fixed supports 612, and the three threaded holes 611 are respectively communicated with the three adjusting guide openings 608; Three adjusting guide rods 610 are respectively arranged on the inner walls of the three adjusting guide openings 608, and valve body fixing parts 609 are arranged at one ends of the three adjusting guide rods 610; Three locking screws 607 are respectively arranged inside the three threaded holes 611.

[0028] Specifically, during use, rotate the locking screw 607 so that the adjusting guide rod 610 can move inside the adjusting guide opening 608. At this time, move the adjusting guide rod 610 according to the inner diameter difference between the flange and the valve body part to adjust the vertical distance between the valve body fixing part 609 and the flange fixing part 604. After adjustment, lock the adjusting guide rod 610 with the locking screw 607. Then place the welded valve body part 3 on the processing pedestal 1. At this time, start the servo motor 601. The servo motor 601 can drive the threaded flat plate 606 to rotate, and then drive the movable guide seat 605 to move through the threaded flat plate 606, so that the movable guide seat 605 moves inside the movable guide groove 603 and gradually unfolds until the movable guide seat 605 drives the valve body fixing part 609 and the flange fixing part 604 to fix the valve body part and the flange; In a specific application scenario, the processing and fixing module 6 is applicable to the processing, welding and fixing link of the valve body, that is, when the processing and fixing module 6 is used, it can synchronously fix the flange and the valve body part, and adopts a multi-point fixing method during fixing. After fixing, the flange and the valve body part can be on the same axis, thereby avoiding their deviation, further increasing the welding effect and welding quality of the device during welding. At the same time, during fixing, the device can adjust the vertical distance between the valve body fixing part 609 and the flange fixing part 604 according to the inner diameter difference between the flange and the valve body part to ensure the fixing effect and increase the applicability of the device.

[0029] Refer to Figure 1 、 Figure 3 and Figure 7 In a preferred embodiment, a welding guide rail 2 is fixedly connected to the top of the arc-shaped sliding frame 410. A welding tooth ring 11 is arranged on the welding guide rail 2. A welding support 7 is fixedly connected to the inner wall of the welding tooth ring 11. An electric telescopic rod 10 is fixedly connected to the welding support 7. The output end of the electric telescopic rod 10 is fixedly connected to a welding torch support 9. The welding torch body 8 is arranged on the welding torch support 9, and a driving motor 12 is fixedly connected to the top of the arc-shaped sliding frame 410. The output shaft of the driving motor 12 is connected to a driving gear 13 through a coupling, and the driving gear 13 meshes with the welding tooth ring 11.

[0030] Specifically, during the welding operation, the electric telescopic rod 10 operates to adjust the position of the welding gun body 8, change the size of its welding movement path, and until it reaches the welding point. At this time, the drive motor 12 and the welding gun body 8 operate. The drive motor 12 can drive the drive gear 13 to rotate. Since the drive gear 13 meshes with the welding tooth ring 11, it can further cause the welding tooth ring 11 to rotate, and further drive the welding bracket 7, the electric telescopic rod 10, the welding gun bracket 9 and the welding gun body 8 to rotate for welding operation; In a specific application scenario, the electric telescopic rod 10 is used to adjust the position of the welding gun body 8 to adjust the path size during the welding of the welding gun body 8, and then adjust according to the size of the processed valve body to increase the applicability of the device.

[0031] A valve body processing and welding method uses a valve body processing and welding device as described above, including the following steps: Step 1: When in use, rotate the locking screw 607 so that the adjusting guide rod 610 can move inside the adjusting guide opening 608. At this time, move the adjusting guide rod 610 according to the inner diameter difference between the flange and the valve body part to adjust the vertical distance between the valve body fixing part 609 and the flange fixing part 604. After adjustment, lock the adjusting guide rod 610 through the locking screw 607. Then place the welded valve body part 3 on the processing pedestal 1. At this time, start the servo motor 601. The servo motor 601 can drive the threaded flat plate 606 to rotate, and then drive the movable guide seat 605 to move through the threaded flat plate 606, so that the movable guide seat 605 moves inside the movable guide groove 603 and gradually unfolds until the movable guide seat 605 drives the valve body fixing part 609 and the flange fixing part 604 to fix the valve body part and the flange; Step 2: During the welding operation, the electric telescopic rod 10 operates to adjust the position of the welding gun body 8, change the size of its welding movement path, and until it reaches the welding point. At this time, the drive motor 12 and the welding gun body 8 operate. The drive motor 12 can drive the drive gear 13 to rotate. Since the drive gear 13 meshes with the welding tooth ring 11, it can further cause the welding tooth ring 11 to rotate, and further drive the welding bracket 7, the electric telescopic rod 10, the welding gun bracket 9 and the welding gun body 8 to rotate for welding operation; Step 3: Before welding, the electric push rod 404 located on the lower annular rail 405 drives the mounting frame 419 to move so that it contacts the welded valve body part 3. At the same time, the electric rod 406 on the lower annular rail 405 operates, causing the fixed frame 424 to drive the guide wheel 420 to move, and further causing the preheating soft frame belt 414 to contact the valve body part. After that, the general-purpose motor 422 on the lower annular rail 405 operates, causing the guiding bracket 407 and the fixed frame 424 to move. At the same time, the winding motor 425 operates to relax the preheating soft frame belt 414 until the preheating soft frame belt 414 is circumferentially arranged at the unwelded part. At this time, the heating power supply part 418 is started, and the heating rod 416 is heated through the heating line 417 to preheat the unwelded part. During welding, the general-purpose motor 422 and the winding motor 425 on the lower annular rail 405 reverse, causing the winding wheel 421 to wind the preheating soft frame belt 414, gradually exposing the unwelded part. At the same time, the welding gun body 8 welds the exposed part. As the welded part increases, the electric lifting rod 411 drives the upper annular rail 401 to descend, so that the heat preservation soft frame belt 413 on the upper annular rail 401 and the preheating soft frame belt 414 are on the same horizontal plane. After that, the electric push rod 404 and the electric rod 406 on the upper annular rail 401 operate, causing the mounting frame 419 and the fixed frame 424 on the upper annular rail 401 to move until the mounting frame 419 contacts the heat preservation soft frame belt 413 and the welded valve body part 3. After that, the general-purpose motor 422 and the winding motor 425 on the upper annular rail 401 operate to relax the heat preservation soft frame belt 413, cover the welded part, and perform heat preservation heating. When the circumferential welding reaches the end part, the telescopic oil cylinder 415 operates, causing the arc-shaped sliding frame 410 to move on the arc-shaped rail seat 409, thereby driving the upper annular rail 401 and the lower annular rail 405 to move, causing the preheating soft frame belt 414 and the heat preservation soft frame belt 413 to deflect as a whole by a certain distance to expose the end unwelded part until the welding is completed.

[0032] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A valve body processing and welding device, characterized in that, Including: A processing pedestal, on the top of which an installation groove is opened, and a fixed bracket is fixedly connected to the outer wall of one side of the processing pedestal; A processing and fixing module, which is arranged inside the installation groove and is used to fix the flange and the valve body and ensure that they are on the same axis; A welded valve body part, which is located above the processing pedestal and includes a valve body part and a flange; A stress welding module, which is located on the fixed bracket and is used to control the temperature of the unwelded and welded parts, so as to reduce the temperature difference between the welding point temperature and the unwelded and welded parts; A welding gun body, which is arranged outside the welded valve body part; The stress welding module includes: A lower annular rail, which is located outside the processing pedestal, and an upper annular rail is arranged above the lower annular rail. Fixed tooth rings are fixedly connected to the inner walls of the lower annular rail and the upper annular rail; Two connecting brackets, which are respectively arranged on the lower annular rail and the upper annular rail. Electric push rods are fixedly connected to both connecting brackets, and mounting frames are fixedly connected to the output ends of both electric push rods; Two guiding brackets, which are respectively arranged on the lower annular rail and the upper annular rail. Electric rods are fixedly connected to both guiding brackets, and fixed frames are fixedly connected to the output ends of both electric rods; Two winding wheels, which are respectively arranged on the two fixed frames. A preheating soft frame belt and a heat preservation soft frame belt are respectively arranged on the two winding wheels, and one ends of the preheating soft frame belt and the heat preservation soft frame belt are respectively arranged on the two mounting frames.

2. The valve body processing and welding device according to claim 1, characterized in that, The stress welding module further includes: An arc-shaped rail seat, which is arranged on the top of the fixed bracket. An arc-shaped sliding frame is arranged on the arc-shaped rail seat, and the lower annular rail is arranged on the arc-shaped sliding frame; Two mounting vertical rods, which are respectively arranged on the arc-shaped rail seat and the arc-shaped sliding frame. A telescopic oil cylinder is arranged on the outer walls of both mounting vertical rods.

3. A valve body processing and welding device according to claim 2, characterized in that, The stress welding module further includes: Two electric lifting rods, which are both fixedly connected to the arc-shaped sliding frame. The output ends of both electric lifting rods are fixedly connected to the same lifting frame, and the upper annular rail is arranged on the lifting frame; Two winding motors, which are respectively arranged on the two fixed frames. The output shafts of both winding motors are respectively connected to the tops of the two winding wheels through couplings.

4. A valve body processing and welding device according to claim 3, characterized in that, The stress welding module further includes: Two guide wheels, which are respectively arranged on the two fixed frames. The outer walls of both guide wheels are respectively in contact with the outer walls of the preheating soft frame belt and the heat preservation soft frame belt; Two heating power supply parts, which are respectively arranged inside the two mounting frames. Two heating circuits are arranged on both heating power supply parts, and the four heating circuits are respectively arranged on the preheating soft frame belt and the heat preservation soft frame belt.

5. A valve body processing and welding device according to claim 4, characterized in that, The stress welding module further includes: Multiple heating rods, which are respectively arranged on the preheating soft frame belt and the heat preservation soft frame belt, and the multiple heating rods are respectively connected to the four heating circuits; Two general motors are respectively arranged on two guiding brackets. Output shafts of the two general motors are both connected with gear members through couplings, and the two gear members are respectively meshed with two fixed toothed rings.

6. A valve body processing and welding device according to claim 5, characterized in that, The processing and fixing module includes: A servo motor arranged at the bottom of the installation groove; A fixed disc seat arranged on the inner wall of the installation groove. The fixed disc seat is located above the servo motor, and three movable guide grooves are formed at the top of the fixed disc seat; A threaded flat plate connected with the output shaft of the servo motor through a coupling. The threaded flat plate is located inside the fixed disc seat, and three movable guide seats are arranged on the threaded flat plate. Outer walls of the three movable guide seats are respectively in contact with inner walls of the three movable guide grooves.

7. A valve body processing and welding device according to claim 6, characterized in that, The processing and fixing module further includes: Three flange fixing members respectively arranged on the three movable guide seats; Three fixed supports respectively arranged on the three movable guide seats. Adjusting guide openings and threaded holes are formed in the three fixed supports, and the three threaded holes are respectively communicated with the three adjusting guide openings; Three adjusting guide rods respectively arranged on inner walls of the three adjusting guide openings. One ends of the three adjusting guide rods are all provided with valve body fixing members; Three locking screws respectively arranged inside the three threaded holes.

8. A valve body processing and welding device according to claim 7, characterized in that, A welding guide rail is fixedly connected to the top of the arc-shaped sliding frame. A welding toothed ring is arranged on the welding guide rail. A welding support is fixedly connected to the inner wall of the welding toothed ring. An electric telescopic rod is fixedly connected to the welding support. An output end of the electric telescopic rod is fixedly connected to a welding torch support. A welding torch body is arranged on the welding torch support. A driving motor is fixedly connected to the top of the arc-shaped sliding frame. An output shaft of the driving motor is connected with a driving gear through a coupling, and the driving gear is meshed with the welding toothed ring.

9. A method for machining and welding a valve body, using a valve body machining and welding device as described in claim 8, characterized in that, Including the following steps: Step 1: Place the welding valve body part on the processing pedestal, and fix the valve body part and the flange plate of the welding valve body part through the processing and fixing module; Step 2: During the welding operation, the electric telescopic rod runs to adjust the position of the welding torch body to make it reach the welding point. At this time, the driving motor and the welding torch body run and welding is carried out; Step 3: During the welding process, the stress welding module runs to preheat the un-welded part and keep the welded part warm as the welding progresses until the welding is completed.

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