Welding device and welding method for shielding sleeve of shielding type submersible electric pump

Abstract

The invention provides a welding device for a shielding sleeve of a shielding type submersible electric pump, which comprises a case, a mounting disc is arranged in the case, a fixed supporting piece is arranged on the mounting disc, the shielding sleeve is inserted on the outer side of the fixed supporting piece, the fixed supporting piece can support and fix the shielding sleeve, a lifting assembly is further arranged in the case, a welding gun is arranged on the lifting assembly, and the welding gun is arranged on the lifting assembly. The lifting assembly can drive the welding gun to move up and down in the axis direction of the shielding sleeve. The inner wall of the shielding sleeve can be supported and fixed through the fixed supporting piece, the problem of thermal deformation caused by local high temperature in the welding process of a welding gun can be effectively avoided, the welding quality is greatly improved, and the yield of products is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding equipment, in particular to a shielding type submersible electric pump shielding sleeve welding device and method. BACKGROUND

[0002] Traditional submersible electric pumps rely on mechanical seal structures to block the intrusion of liquid into the motor interior, but this structure has the inherent defect that the seal is prone to wear and failure, making it difficult to reliably avoid the risk of motor water ingress for a long period of time; while the shielding type submersible electric pump, through the innovative shielding sleeve isolation design, completely eliminates the mechanical seal structure, eliminating the leakage risk caused by seal wear from the root, and achieving complete physical isolation of the motor interior from the conveying medium, thus fundamentally eliminating the motor water ingress problem, and therefore being widely applicable to clean liquid or mildly corrosive liquid conveying scenarios.

[0003] Currently, the device and process method used for shielding sleeve welding have the core problem of insufficient support structure adaptability, which has seriously hindered the improvement of production efficiency and the stability of product quality. The specific reason is that the traditional shielding sleeve welding support is mostly a rigid clamp with a fixed diameter, which can only adapt to a single specification of shielding sleeve; and due to machining tolerances, the same specification of shielding sleeve is prone to not fitting tightly with the inner wall of the clamp, resulting in workpiece deviation during welding and greatly increasing the misalignment rate of the weld. At the same time, since the shielding sleeve is mostly a thin-walled stainless steel part with a thickness of 1.5-3mm, the local high temperature during welding is relatively high, which easily causes the unsupported part of the shielding sleeve to collapse or deform, with a deformation amount often exceeding 0.5mm, which needs to be corrected subsequently, resulting in unnecessary procedures and cost occupation, greatly reducing the welding quality and efficiency. SUMMARY

[0004] Therefore, the present application provides a shielding type submersible electric pump shielding sleeve welding device, which can firmly and stably support and fix the inner wall of the shielding sleeve through the fixed support, solving the problem of poor support structure adaptability of the traditional shielding sleeve welding support, which seriously affects the production efficiency and product quality, and the unsupported part of the inner wall of the shielding sleeve is prone to collapse or deformation during the welding process, greatly reducing the welding quality and efficiency.

[0005] To solve the above technical problems, the present application provides a kind of welding device for shielding type submersible electric pump shielded sleeve, including cabinet, installation disc is provided in cabinet, fixed support is provided on installation disc, shielded sleeve is inserted in the outside of fixed support, fixed support can support and fix shielded sleeve, lifting assembly is also provided in cabinet, welding torch is provided on lifting assembly, lifting assembly can drive welding torch to move up and down along the axis direction of shielded sleeve.The present application can realize the support and fixation of the inner wall of shielded sleeve by fixed support, can effectively avoid the heat distortion problem caused by local high temperature during welding, greatly improve the welding quality, improve the product yield.

[0006] Fixed support includes adjusting cylinder arranged on installation disc, adjusting member is arranged in adjusting cylinder, supporting ring is arranged on the upper part of flange disc, supporting ring is cylindrical annular cylinder structure, and the thickness of its inside increases from bottom to top, adjusting member can move from bottom to top with supporting disc to realize the opening of supporting ring.The present application can realize the opening of supporting ring with supporting disc during the movement of adjusting member along the axis of adjusting cylinder, and then realize the stable and efficient support and fixation of shielded sleeve of various specifications or same specification with certain tolerance, greatly improve the welding quality and welding efficiency.

[0007] The outer wall of supporting ring is provided with a plurality of through grooves, and each through groove is provided with an elastic sealing pad inside.The present application can realize the increase of the expansion diameter range of supporting ring by the plurality of through grooves arranged on supporting ring, and can realize the adaptive plugging operation of through groove by elastic sealing pad, which can effectively prevent welding waste from entering supporting ring through through groove, and greatly reduce the difficulty of subsequent cleaning.

[0008] The inner side wall of adjusting cylinder is provided with internal thread, the outer side wall of adjusting member is provided with external thread matched with internal thread, the upper part of adjusting member is provided with tightening disc, and the internal hexagonal hole matched with internal hexagonal wrench is arranged on the tightening disc.The present application can adjust the height of supporting ring on the outer side of adjusting member by the threaded connection of adjusting member and adjusting cylinder, and realize the opening operation of supporting ring by rotating the internal hexagonal wrench inserted into the internal hexagonal hole of tightening disc, so that it is convenient for the support and fixation of shielded sleeve of different diameters.

[0009] Drive member is provided in cabinet, drive member is servo motor, the upper part of drive member is provided with rotary disc, and installation disc is arranged on rotary disc.The present application can rotate the rotary disc by starting the rotation of the output shaft of servo motor, which is convenient for the welding operation of ring gap of workpiece to be welded by cooperating with welding torch.

[0010] The lifting assembly comprises a telescopic push rod arranged in the cabinet, an installation block is arranged at the output rod end of the telescopic push rod, a moving platform is arranged on the installation block, a three-dimensional adjusting platform is arranged on the moving platform, and the welding gun is arranged on the three-dimensional adjusting platform.The position of the welding gun can be conveniently and efficiently adjusted by the telescopic push rod, the moving platform and the three-dimensional adjusting platform, the adaptability of the welding range is greatly improved, and the welding quality and efficiency are greatly improved.

[0011] The telescopic push rod is an electric push rod or a hydraulic push rod, the moving platform is a linear sliding table, and the three-dimensional adjusting platform is arranged on the sliding block of the linear sliding table.The horizontal position of the three-dimensional adjusting platform and the welding gun thereon can be adjusted by the moving platform, so that the welding operation of different diameter workpieces can be adapted.

[0012] An exhaust port is arranged at the upper portion of the cabinet, and a filter plate is arranged on the exhaust port.The exhaust port can be used for discharging smoke and dust generated during welding, and the filter plate can be used for blocking welding slag and other solid particles in the smoke and dust, so that the welding device is more environmentally friendly and safe.

[0013] A transparent observation door is arranged at the outer side of the cabinet, an electric telescopic rod is arranged at the upper portion of the transparent observation door, and the fixed end of the electric telescopic rod is arranged at the upper portion of the cabinet.The output rod of the electric telescopic rod can be extended and retracted to automatically and efficiently open and close the transparent observation door, so that the operator can take and place the welding workpiece conveniently, and the welding operation in the cabinet can be viewed in real time through the transparent observation door, so that the welding device is more safe and convenient.

[0014] A welding method of a shielding type submersible electric pump shielding sleeve, comprising the following steps: S1, welding of the vertical joint of the shielding sleeve, installing the fixed support on the mounting disc; S2, inserting the shielding sleeve to be welded on the fixed support, and adjusting the fixed support to support and fix the shielding sleeve; S3, adjusting the position of the welding gun, starting the output rod of the telescopic push rod to rise or descend, and starting the welding gun to weld the to-be-welded part of the shielding sleeve; S4, taking off the shielding sleeve after welding; S5, welding of the connecting part of the shielding sleeve and the pump body of the submersible electric pump, installing a clamp for fixing the pump body of the submersible pump on the mounting disc, and then fixing the pump body on the clamp; S6, inserting the shielding sleeve on the fixed support, and abutting the shielding sleeve with the to-be-welded part of the pump body, and then adjusting the fixed support to support and fix the shielding sleeve; S7, adjusting the position of the welding gun, starting the output shaft of the driving member to rotate with the mounting disc, the pump body and the shielding sleeve on the mounting disc, and then starting the welding gun to perform welding operation on the corresponding part; S8, the welded pump body and the shielding sleeve welded on the pump body are removed.

[0015] In summary, compared with the prior art, the present application includes at least one of the following beneficial technical effects: 1. Preventing thermal deformation and improving welding quality: The present application can provide uniform support force by closely adhering the support ring to the inner wall of the shielding sleeve, and the amount of thermal deformation of the shielding sleeve during welding is reduced, without the need for subsequent correction processes, greatly improving the yield rate and reducing waste loss.

[0016] 2. Wide adaptability, solving the problem of single specification adaptation: The present application can adapt to shielding sleeves of various diameters through the elastic expansion structure of the support ring, and can compensate for the clamping failure of shielding sleeves of the same specification due to machining tolerances, without the need to replace the clamp, greatly improving the range of specifications compared to existing devices, reducing clamp replacement time, and greatly improving production efficiency per batch.

[0017] 3. Preventing welding slag from entering and reducing cleaning difficulty: The present application can block the gap between the through slot of the support ring through the elastic sealing gasket, greatly reducing the amount of welding slag entering the inside of the support structure, greatly reducing the single cleaning time, greatly improving the maintenance efficiency, and also avoiding the wear and tear of the adjustment components due to high-temperature entry of welding slag, prolonging the service life of the components.

[0018] 4. Precise adjustment of welding gun to ensure uniform weld: The present application can greatly improve the positioning accuracy of the welding gun through multi-dimensional adjustment, i.e., telescopic push rod + linear slide + three-dimensional adjustment platform, and is suitable for welding operations of various angles, reducing the distance deviation between the nozzle and the weld, greatly reducing the weld penetration fluctuation, and greatly improving the sealing performance detection pass rate.

[0019] 5. Efficient girth welding to improve production rhythm: The present application rotates the workpiece through a servo motor, achieving convenient and fast adjustment of different welding positions, and when it rotates at a constant speed, it can realize girth welding, with better girth welding speed stability, greatly reduced weld width deviation, greatly shortened single welding time, greatly improved hourly output, and greatly improved production efficiency.

[0020] 6. Smoke filtration and emission in line with environmental protection standards: The present application can intercept welding slag and large particles through a filter plate, reducing the concentration of welding smoke emissions, avoiding the inhalation of harmful particles by operators, greatly reducing occupational health risks, reducing air pollution in the workshop, and reducing environmental governance costs.

[0021] 7. Automatic observation door to improve operation safety: The present application can automatically open and close the observation door through an electric telescopic rod, avoiding manual contact with high-temperature workpieces and reducing the risk of burns to zero; the transparent observation door facilitates real-time monitoring of the welding state, reducing welding deviations caused by manual door opening for observation, and greatly reducing the weld rework rate. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structural schematic view of the welding device for the shielding sleeve of the shielding submersible electric pump of the present application. Figure 2 It is a structural schematic view of the welding device for the shielding sleeve of the shielding submersible electric pump of the present application. Figure 1 It is an enlarged view of A in the present application. Figure 3 It is a front view of the welding device for the shielding sleeve of the shielding submersible electric pump of the present application. Figure 4 It is a front view of the welding device for the shielding sleeve of the shielding submersible electric pump of the present application. Figure 3 It is a sectional view of B-B in the present application. Figure 5 It is a sectional view of B-B in the present application. Figure 4 It is an enlarged view of C in the present application. Figure 6 It is an enlarged view of D in the present application. Figure 4 It is an enlarged view of D in the present application.

[0023] Reference signs: 100, case; 110, discharge port; 200, mounting disc; 300, fixed support; 310, adjusting cylinder; 320, adjusting piece; 330, support disc; 340, flange disc; 350, support hoop; 351, through slot; 360, sealing gasket; 400, lifting assembly; 410, telescopic push rod; 420, mounting block; 430, moving platform; 440, three-dimensional adjusting platform; 500, welding gun; 600, driving piece; 700, filter plate; 800, transparent observation door; 900, electric telescopic rod. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following will combine the drawings of the embodiments of the present application to make a brief description. Figures 1-6 The technical solutions of the embodiments of the present application are described clearly and completely. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those skilled in the art belong to the scope of protection of the present application.

[0025] As Figures 1-6The embodiment provides a welding device and method for a shielding sleeve of a submerged electric pump, which comprises a cabinet 100, wherein the cabinet 100 is a cuboid frame structure and is used for integrating all components and forming a closed welding space. An installation disc 200 is arranged in the cabinet 100, the installation disc 200 is provided with a fixed support 300, the shielding sleeve is inserted outside the fixed support 300, the fixed support 300 can support and fix the shielding sleeve, more specifically, the fixed support 300 is used for supporting and fixing the inside of the shielding sleeve, and a lifting assembly 400 is further arranged in the cabinet 100, the lifting assembly 400 is provided with a welding gun 500, and the lifting assembly 400 can drive the welding gun 500 to move up and down along the axial direction of the shielding sleeve. The fixed support 300 can support and fix the inner wall of the shielding sleeve, the problem of thermal deformation caused by local high temperature during welding of the welding gun 500 can be effectively avoided, the welding quality is greatly improved, and the product yield is improved.

[0026] According to one embodiment of the present application, as shown in Figures 1-6 The fixed support 300 comprises an adjusting cylinder 310 arranged on the installation disc 200, the adjusting cylinder 310 is a hollow cylindrical structure, is made of quenched and tempered steel, the lower part of the outer side wall is welded and fixed to the installation disc 200, the inner side wall is processed with internal threads, and is used for cooperating with an adjusting part 320 to realize lifting. The adjusting cylinder 310 is provided with the adjusting part 320, the adjusting part 320 is a cylindrical structure, is made of chrome-plated steel, the outer side wall is processed with external threads matched with the internal threads of the adjusting cylinder 310, the upper part of the adjusting part 320 is integrally formed with a tightening disc, the outer side of the adjusting part 320 is welded with a supporting disc 330, a flange disc 340 is arranged on the installation disc 200 and located outside the supporting disc 330, the flange disc 340 is an annular structure, is uniformly fixed to the installation disc 200 through bolts, and is located outside the adjusting cylinder 310; a supporting ring 350 is a cylindrical annular cylinder, is made of spring steel, the internal thickness increases linearly from bottom to top, and the lower part of the supporting ring 350 is fixed to the flange disc 340 through bolts, as shown in Figure 2 The outer side wall of the supporting ring 350 is uniformly provided with six through grooves 351 along the circumference, each through groove 351 is internally bonded with an elastic sealing pad 360 through high-temperature resistant glue, the through groove 351 can increase the expansion range of the supporting ring 350, the elastic sealing pad 360 can block the gap of the through groove 351 and prevent welding slag from entering. The upper part of the flange disc 340 is provided with the supporting ring 350, the supporting ring 350 is a cylindrical annular cylinder structure, and the internal thickness thereof increases from bottom to top, and the adjusting part 320 can move upwards with the supporting disc 330 to realize the opening of the supporting ring 350.

[0027] The working logic of the fixed support 300 is as follows: the adjusting part 320 is lifted along the internal thread of the adjusting cylinder 310 by rotating the tightening disc with an internal hexagonal wrench, the supporting disc 330 is synchronously lifted, the conical surface of the supporting disc 330 extrudes the inner side wall of the supporting ring 350, the thickness of the supporting ring 350 is gradually increased from top to bottom, the extrusion force is gradually increased when the supporting disc 330 is lifted, the supporting ring 350 is expanded radially outward, until the elastic sealing pad 360 is tightly attached to the inner wall of the shielding sleeve, and the support and fixation of shielding sleeves with different diameters and tolerances are realized.

[0028] The supporting ring 350 is expanded radially outward by the supporting disc 330 during the movement of the adjusting part 320 along the axis of the adjusting cylinder 310, and the stable and efficient support and fixation of shielding sleeves with different diameters or the same specification and certain tolerances are realized, which greatly improves the welding quality and efficiency.

[0029] According to another embodiment of the present application, as shown in Figure 2 、 Figure 4 and Figure 5 , a plurality of through grooves 351 are formed on the outer side wall of the supporting ring 350, and an elastic sealing pad 360 is arranged in each through groove 351. The diameter range of the expanded supporting ring 350 can be increased by the plurality of through grooves 351 formed on the supporting ring 350, and the adaptive plugging operation of the through groove 351 can be realized by the elastic sealing pad 360, which can effectively prevent welding debris from entering the supporting ring 350 through the through groove 351, greatly reducing the difficulty of subsequent cleaning.

[0030] According to another embodiment of the present application, as shown in Figure 4 and Figure 5 , an internal thread is formed on the inner side wall of the adjusting cylinder 310, an external thread matched with the internal thread is formed on the outer side wall of the adjusting part 320, and a tightening disc is arranged on the upper part of the adjusting part 320, and an internal hexagonal hole matched with an internal hexagonal wrench is formed on the tightening disc. The height of the supporting ring on the outer side of the adjusting part 320 can be adjusted by rotating the tightening disc with an internal hexagonal wrench inserted into the internal hexagonal hole of the tightening disc through the threaded connection of the adjusting part 320 and the adjusting cylinder 310, and the supporting ring 350 can be expanded, which facilitates the support and fixation of shielding sleeves with different diameters.

[0031] According to another embodiment of the present application, as shown in Figure 4As shown, the drive member 600 is arranged in the cabinet 100, the drive member 600 is a servo motor, the upper portion of the drive member 600 is provided with a rotating disc, and the mounting disc 200 is arranged on the rotating disc. The output shaft of the servo motor is connected with the rotating disc through a key, the mounting disc 200 is fixed on the rotating disc through bolts, and the servo motor can drive the rotating disc, the mounting disc 200 and the workpiece to rotate at a uniform speed, thereby providing stable power for the girth welding. The output shaft of the servo motor is started to rotate together with the rotating disc, so that the welding of the girth of the workpiece to be welded can be realized by cooperating with the welding gun 500.

[0032] According to another embodiment of the present application, as shown in Figure 1 、 Figure 2 and Figure 3 , the lifting assembly 400 comprises a telescopic push rod 410 arranged in the cabinet 100, the output rod end of the telescopic push rod 410 is provided with a mounting block 420, the mounting block 420 is provided with a moving platform 430, the moving platform 430 is provided with a three-dimensional adjusting platform 440, and the welding gun 500 is arranged on the three-dimensional adjusting platform 440.

[0033] The working logic of the lifting assembly 400 is as follows: the telescopic push rod 410 drives the mounting block 420 to move up and down, so as to realize the coarse height adjustment of the welding gun 500; the linear slide table drives the three-dimensional adjusting platform 440 to move horizontally, so as to adapt to the welding radius of workpieces with different diameters; the three-dimensional adjusting platform 440 realizes the fine adjustment of the X (forward and backward), Y (left and right) and Z (up and down) axes of the welding gun 500, so as to ensure that the nozzle of the welding gun 500 and the welding seam are accurately matched in distance and angle, and the welding requirements of vertical seams and girth seams are met.

[0034] The present application can realize convenient and efficient adjustment of the position of the welding gun 500 by cooperating the telescopic push rod 410 with the moving platform 430 and the three-dimensional adjusting platform 440, thereby greatly improving the adaptability of the welding range and greatly improving the welding quality and welding efficiency.

[0035] The telescopic push rod 410 is an electric push rod or a hydraulic push rod, the moving platform 430 is a linear slide table, and the three-dimensional adjusting platform 440 is arranged on the slider of the linear slide table. The present application can realize the adjustment of the horizontal position of the three-dimensional adjusting platform 440 and the welding gun 500 thereon by the moving platform 430, thereby facilitating the welding operation of workpieces with different diameters.

[0036] According to another embodiment of the present application, as shown in Figure 1 and Figure 6As shown, the upper part of the cabinet 100 is provided with a discharge port 110, and the discharge port 110 is provided with a filter plate 700. The upper part of the cabinet 100 is centrally provided with a circular discharge port 110, and the inner side of the discharge port 110 is connected with the filter plate 700 through buckling, so that the welding slag and large-particle impurities in the welding dust can be filtered. The upper part of the cabinet 100 is centrally provided with a circular discharge port 110, and the inner side of the discharge port 110 is connected with the filter plate 700 through buckling, so that the welding slag and large-particle impurities in the welding dust can be filtered. The present application can realize the discharge operation of the welding dust in the welding through the discharge port 110, and realize the blocking operation of the welding slag or other solid particles in the welding dust through the filter plate 700, which is more environmentally friendly and safe.

[0037] According to another embodiment of the present application, as Figure 1 and Figure 2 As shown, the outer side of the cabinet 100 is provided with a transparent observation door 800, and the upper part of the transparent observation door 800 is provided with an electric telescopic rod 900, and the fixed end of the electric telescopic rod 900 is arranged on the upper part of the cabinet 100. The front side of the cabinet 100 is connected with the transparent observation door 800 through a hinge, the upper part of the right side of the transparent observation door 800 is connected with the movable end of the electric telescopic rod 900 through a hinge, and the fixed end of the electric telescopic rod 900 is fixed on the top front side of the cabinet 100 through a bolt. The electric telescopic rod 900 can drive the observation door to automatically open and close, avoiding manual contact with the high-temperature area. The present application can realize the automatic and efficient opening and closing operation of the transparent observation door 800 through the extension and retraction of the output rod of the electric telescopic rod 900, which is convenient for the operator to take and place the welding workpiece. At the same time, the welding in the cabinet 100 can also be viewed in real time through the transparent observation door 800, which is more safe and convenient.

[0038] A shielding type submersible electric pump shielding sleeve welding method, comprising a welding device, characterized by comprising the following steps: S1, preparation for vertical seam welding of the shielding sleeve, welding of the vertical seam of the shielding sleeve, installing the fixed support 300 on the mounting disc 200; S2, support and fixation of the shielding sleeve, inserting the shielding sleeve to be welded on the fixed support 300, and adjusting the fixed support 300 to support and fix the shielding sleeve; S3, positioning of the welding gun 500 and vertical seam welding, starting the output rod of the telescopic push rod 410 to rise or descend, and simultaneously starting the welding gun 500 to weld the shielding sleeve to be welded part; S4, taking off the shielding sleeve after welding; S5, preparation for the girth seam welding of the shielding sleeve and the pump body, welding of the connecting part of the shielding sleeve and the pump body of the submersible electric pump, installing the clamp for fixing the pump body of the submersible pump on the mounting disc 200, and then fixing the pump body on the clamp; S6, the shielding sleeve is inserted on the fixed support 300, and the shielding sleeve is attached to the welding part of the pump body, then the fixed support 300 is adjusted to support and fix the shielding sleeve; S7, the welding gun 500 is positioned and ring seam welding is performed, the position of the welding gun 500 is adjusted, the output shaft of the driving part 600 is started to rotate, the mounting disc 200 and the pump body and the shielding sleeve thereon are rotated, and then the welding gun 500 is started to perform welding operation on the corresponding part. S8, the workpiece after ring seam welding is taken down.

[0039] The working principle and use method of the present application: First of all, it needs to be clear that the welding device and method involved in the present application is mainly used for efficient and stable welding of various parts of the vertical seam and the ring seam, and the working principle and use method of the present application are described in detail taking the welding of the shielding sleeve of the submerged electric pump as an example, and the working principle is as follows: The device and method realize accurate, efficient and safe welding of the shielding sleeve through cooperation of multiple components, and the core working principle is divided into five modules: (1) shielding sleeve support and fixing module Based on the "screw transmission + elastic expansion" mechanism: the threaded connection of the adjusting part 320 and the adjusting cylinder 310 converts rotation into linear motion, and when the support disc 330 rises, it extrudes the variable-thickness inner wall of the support ring 350, so that the support ring 350 produces radial elastic deformation; the spring steel material of the support ring 350 ensures that it can be reset after deformation, and the elastic sealing gasket 360 fills the gap between the through slot 351 and is attached to the inner wall of the shielding sleeve, which not only provides uniform support force, but also prevents welding slag from entering, while compensating for the processing tolerance, realizing the fixation of shielding sleeves of different specifications.

[0040] (2) multi-dimensional adjustment module of welding gun 500 Two-stage adjustment of "coarse adjustment + fine adjustment" is adopted: the telescopic push rod 410 realizes the up-down coarse adjustment of the welding gun 500, which is suitable for different height workpieces; the linear slide realizes horizontal coarse adjustment, which is suitable for different diameter workpieces; the three-dimensional adjustment platform 440 realizes fine adjustment of X / Y / Z axes, compensates for the installation deviation of the workpiece and the deviation in the welding process, ensures the relative position stability of the welding gun 500 and the weld, and solves the problem of uneven penetration.

[0041] (3) ring seam welding driving module The servo motor drives the workpiece to rotate at a constant speed through the rigid transmission of "output shaft-rotating disc-mounting disc 200", and the closed-loop control of the servo motor greatly reduces the speed fluctuation, ensures the stability of the linear speed of ring seam welding, and avoids uneven weld width; at the same time, the welding gun 500 is fixed, and the workpiece rotates, which can reduce the vibration caused by the movement of the welding gun 500 and improve the flatness of the weld.

[0042] (4) Smoke filtering and discharging module After the welding smoke accumulates in the cabinet 100, it naturally rises through the upper discharge port 110. The porous structure of the filter plate 700 intercepts the welding slag and large-particle impurities. The filtered smoke is discharged through the external pipeline. Of course, a dust collector can also be connected. The discharge concentration is greatly reduced, meeting the environmental protection standards. The filter plate 700 is connected by buckles, facilitating disassembly and cleaning, and avoiding blockage to affect the discharge efficiency.

[0043] (5) Automatic control module of observation door The electric telescopic rod 900 is connected through the hinge of the "fixed end - movable end - observation door", realizing the automatic opening and closing of the observation door. When closed, the observation door is attached to the sealing rubber strip of the cabinet 100, preventing smoke leakage. The transparent tempered glass can withstand 300℃ high temperature, avoiding welding spark burns, and facilitating real-time monitoring of the welding state, reducing manual intervention, and improving operation safety.

[0044] The welding method comprises the following steps: S1: Preparation for shield sleeve vertical seam welding Check the device status: turn on the total power supply of the cabinet 100, confirm the normal power supply / gas supply of the servo motor, telescopic push rod 410, and welding torch 500, the sealing property of the transparent observation door 800 when closed, and the non-blocking of the filter plate 700.

[0045] Install the fixed support 300: weld the adjusting cylinder 310 at the preset position of the mounting disc 200, i.e. coaxial with the rotating disc axis, fix the flange plate 340 of the support ring 350 on the mounting disc 200 through bolts, and ensure that the axis of the support ring 350 coincides with the axis of the adjusting cylinder 310; bond the elastic sealing gasket 360 in the through slot 351 of the support ring 350, and let it stand for 1 hour to cure the glue.

[0046] S2: Support and fixation of shield sleeve Take the shield sleeve to be welded vertically and set it outside the support ring 350, ensuring that the vertical seam of the shield sleeve is located on one side of the welding torch 500.

[0047] Insert the inner hex socket wrench into the inner hex socket of the tightening disc, rotate the adjusting part 320 clockwise, and adjust the adjusting part 320 to rise along the inner thread of the adjusting cylinder 310, driving the support ring 350 to press the inner wall of the support ring 350, until the elastic sealing gasket 360 outside the support ring 350 tightly fits the inner wall of the shield sleeve. It can be detected by a torque wrench. Stop when the tightening torque reaches the appropriate value, and complete the fixation of the shield sleeve.

[0048] S3: Positioning of welding torch 500 and vertical seam welding Start the telescopic push rod 410, drive the mounting block 420 to descend, make the nozzle of the welding gun 500 close to the lower end of the standing seam of the shielding cover; start the linear slide table, adjust the horizontal position of the moving platform 430, so that the welding gun 500 is aligned with the center of the standing seam; fine-tune the welding gun 500 through the three-dimensional adjustment platform 440: adjust the X-axis to adjust the front and back distance of the nozzle, adjust the Y-axis to adjust the left and right distance, adjust the Z-axis to adjust the height to make the nozzle flush with the lower end of the standing seam, and adjust the angle to make the welding angle appropriate.

[0049] Turn on the shielding gas of the welding gun 500, start the welding gun 500, and at the same time control the telescopic push rod 410 to rise uniformly, drive the welding gun 500 to weld along the standing seam from bottom to top; monitor the welding seam state through the transparent observation door 800 during the welding process, and if there is deviation, fine-tune in real time through the three-dimensional adjustment platform 440.

[0050] S4: Workpiece after standing seam welding After the standing seam welding is completed, turn off the welding gun 500 and the shielding gas, and the telescopic push rod 410 drives the welding gun 500 to reset to the initial position; use the internal hex wrench to rotate the adjusting part 320 counterclockwise, lower the supporting disc 330, and the supporting ring 350 is elastically reset and separated from the inner wall of the shielding cover.

[0051] Start the electric telescopic rod 900, open the transparent observation door 800, and manually take off the shielding cover after welding from the supporting ring 350 and place it on the cooling table.

[0052] S5: Preparation for ring seam welding of shielding cover and pump body Remove the elastic sealing gasket 360 on the supporting ring 350, and if there is welding slag attached, clean it with a steel wire brush and reattach it. Install the pump body clamp on the mounting disc 200 through the bolts; take the submersible electric pump body and place it on the clamp, adjust the clamping screw of the clamp, so that the axis of the pump body interface coincides with the axis of the supporting ring 350, and tighten the clamping screw.

[0053] S6: Adhesion and fixation of shielding cover and pump body Put the shielding cover cooled in S4 outside the supporting ring 350 again, adjust the height of the shielding cover, so that the upper end of the shielding cover is in close contact with the lower end of the pump body interface, and prevent relative rotation by inserting the positioning pin into the positioning hole of the shielding cover and the pump body.

[0054] Repeat the operation of S2, rotate the adjusting part 320 to make the supporting ring 350 expand, and the elastic sealing gasket 360 is tightly attached to the inner wall of the shielding cover, and at the same time the shielding cover is tightly pressed by the clamping screw of the clamp, to ensure that the shielding cover is tightly attached to the pump body without gap.

[0055] S7: Positioning of welding gun 500 and ring seam welding Repeat the welding gun 500 positioning step of S3, so that the welding gun 500 nozzle is aligned with the annular gap of the shield and the pump body; start the servo motor to drive the turntable to rotate at a constant speed, which can be controlled by the frequency converter to keep the speed constant, and the turntable drives the mounting disc 200, the pump body and the shield to rotate synchronously.

[0056] Turn on the welding gun 500 and the shielding gas, keep the welding gun 500 position fixed, and realize annular gap welding through the rotation of the workpiece; during the welding process, the encoder of the servo motor is used to monitor the rotation speed in real time, and if fluctuations occur, the motor output torque is automatically adjusted to ensure stable rotation speed.

[0057] S8: Workpiece after annular gap welding After the annular gap welding is completed, turn off the welding gun 500, the shielding gas and the servo motor, and the telescopic push rod 410 drives the welding gun 500 to reset; rotate the adjusting member 320 counterclockwise to loosen the support hoop 350, and remove the clamping bolts and positioning pins of the pump body clamp.

[0058] Start the electric telescopic rod 900, open the transparent observation door 800, manually remove the shield and pump body assembly after welding, and place it on the cooling table for cooling; clean the filter plate 700 of the discharge port 110, remove the filter plate 700 from the buckle, blow off the welding slag with compressed air, and if the blockage is serious, use an ultrasonic cleaning machine to clean, and turn off the power of the equipment.

[0059] The present application can realize firm and stable support and fixation of the inner side wall of the shield through the fixed support 300, solve the problems of poor adaptability of the support structure of the traditional shield welding support, serious influence on production efficiency and product quality, and easy collapse or deformation of the inner wall of the shield during the welding process, and greatly reduce the welding quality and welding efficiency.

[0060] In addition, it should be noted that in the description of the present application, unless otherwise specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0061] The above is the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should also be considered as the protection scope of the present application.

Claims

1. A welding device for a shielded submersible pump shield sleeve, comprising a housing (100), characterized in that: The chassis (100) is provided with an installation plate (200), and a fixed support (300) is provided on the installation plate (200). The shielding sleeve is inserted on the outside of the fixed support (300). The fixed support (300) can support and fix the shielding sleeve. The chassis (100) is also provided with a lifting assembly (400), and a welding torch (500) is provided on the lifting assembly (400). The lifting assembly (400) can drive the welding torch (500) to move up and down along the axis of the shielding sleeve. The fixed support (300) includes an adjusting cylinder (310) disposed on the mounting plate (200), an adjusting component (320) disposed inside the adjusting cylinder (310), a support plate (330) disposed on the outside of the adjusting component (320), a flange (340) disposed on the mounting plate (200) and located on the outside of the support plate (330), a support ring (350) disposed on the upper part of the flange (340), the support ring (350) is a cylindrical annular cylindrical structure, and its internal thickness increases from bottom to top. The adjusting component (320) can move the support plate (330) from bottom to top to open the support ring (350). The outer wall of the support ring (350) is provided with a plurality of through grooves (351), and each through groove (351) is provided with an elastic sealing gasket (360).

2. The welding device for the shielded submersible pump shielding sleeve as described in claim 1, characterized in that: The inner wall of the adjusting cylinder (310) is provided with an internal thread, and the outer wall of the adjusting component (320) is provided with an external thread that matches the internal thread. The upper part of the adjusting component (320) is provided with a tightening plate, and the tightening plate is provided with an internal hexagonal hole that matches the internal hexagonal wrench.

3. The welding device for the shielded submersible pump shielding sleeve as described in claim 1, characterized in that: The chassis (100) is provided with a drive unit (600), and a turntable is provided on the upper part of the drive unit (600). The mounting plate (200) is provided on the turntable.

4. The welding device for the shielded submersible pump shielding sleeve as described in claim 1, characterized in that: The lifting assembly (400) includes a telescopic push rod (410) disposed in the housing (100), the output rod end of the telescopic push rod (410) is provided with a mounting block (420), a moving platform (430) is provided on the mounting block (420), a three-dimensional adjustment platform (440) is provided on the moving platform (430), and the welding torch (500) is disposed on the three-dimensional adjustment platform (440).

5. The welding device for the shielded submersible pump shielding sleeve as described in claim 4, characterized in that: The telescopic push rod (410) is an electric push rod or a hydraulic push rod, the moving platform (430) is a linear slide, and the three-dimensional adjustment platform (440) is set on the slider of the linear slide.

6. The welding device for the shielded submersible pump shielding sleeve as described in claim 1, characterized in that: The upper part of the chassis (100) is provided with a discharge port (110), and a filter plate (700) is provided on the discharge port (110).

7. The welding device for the shielded submersible pump shielding sleeve as described in claim 1, characterized in that: A transparent observation door (800) is provided on the outside of the chassis (100), and an electric telescopic rod (900) is provided on the upper part of the transparent observation door (800). The fixed end of the electric telescopic rod (900) is provided on the upper part of the chassis (100).

8. A welding method for a shielded submersible pump shield sleeve, comprising using the welding apparatus described in any one of claims 1-7, characterized in that, Includes the following steps: S1. Preparation for welding the vertical seam of the shielding sleeve; S2, Support and fixation of the shielding sleeve; S3, Welding torch (500) positioning and vertical seam welding; S4. Remove the welded shielding sleeve; S5. Preparation for circumferential welding of the shielding sleeve and the pump body; S6. The shielding sleeve is properly fitted and fixed to the pump body; S7. Positioning of welding torch (500) and circumferential welding; S8. Remove the workpiece after circumferential welding.

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