Auxiliary device for tailor welding of pressure steel pipe segment and stiffening ring

Abstract

The utility model relates to the technical field of hydropower station pressure steel pipe production and manufacturing, in particular to an auxiliary device for tailor welding of a pressure steel pipe segment and a stiffening ring, which comprises a segment turnover device and a stiffening ring welding operation platform. The duct piece turnover device comprises a portal frame structure, a portal frame walking mechanism, a trolley walking mechanism, a rigid lifting mechanism and a composite lifting appliance. The portal frame walking mechanisms are distributed at the two ends of the portal frame structure, and the trolley walking mechanism is installed on the top of the portal frame structure and connected with the portal frame structure in a sliding and clamping mode. The composite lifting appliance is connected to the bottom of the rigid lifting mechanism through a rotary driving device; the top of the rigid hoisting mechanism is fixedly connected with the trolley walking mechanism; the stiffening ring welding operation platform is installed within the moving range of the portal structure. According to the technical scheme, the structure is reasonable, operation is convenient, and the technical problems that the welding workload is large, the precision control difficulty is large, and the safety risk is large due to pipe joint manufacturing, rolling and turning over, stiffening ring tailor welding and rigid constraint of branch pipe pieces can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of the production and manufacture of penstocks for hydropower stations, in particular to an auxiliary device for the butt welding of penstock segments and stiffening rings. Background Art

[0002] In the prior art, there are many large-scale water conservancy and hydropower projects built in high mountains and deep valleys, which involve the layout and use of diversion penstocks. The penstock is made of low-alloy structural steel, which has good compressive capacity and excellent welding performance. Due to the large water pressure during the water diversion process, in order to increase the stability of the penstock, a stiffening ring needs to be arranged outside the penstock.

[0003] In the prior art, such as the Chinese patent document with the publication number CN214602729U, it discloses a rapid welding and installation device for a large-scale penstock stiffening ring, including a welding roller rack, a welding support and a crane rack. The welding support and the crane rack are located on both sides or the same side of the welding roller rack. Installation frames are provided at the upper ends of the two crane racks, a walking frame is fixed between the installation frames, an electric hoist is provided on the walking frame, a welding box and two welding torch supports are provided on the welding support, adjustable welding assemblies are provided on the two welding torch supports, and the two welding torches of the welding box respectively pass through the adjustable welding assemblies. The large-scale penstock is placed on the electric rollers at the upper end of the welding roller rack.

[0004] However, in some construction sites, during the process of arranging the diversion penstock in the tunnel, affected by the tunnel operation environment, usually large-diameter penstocks can only be manufactured and transported to the tunnel in segments. The segments are transported to the assembly position, and then the penstock segments are assembled into an integral pipe section, and the pipe section is transferred to the installation stage. Thus, there are technical problems such as the precision control of the segmented manufacturing of the penstock in the tunnel, many processes, high safety risks and low production efficiency. Therefore, the manufacturing precision of the penstock segments is crucial. Since the precision of the segmented penstock segments directly affects the precision of the pipe section, and when in the segment state, the stiffness of the segments is significantly weaker than that of the pipe section, it is extremely troublesome to lift and turn them. Currently, there is no special auxiliary device for the butt welding of stiffening rings for the segments. Summary of the Invention

[0005] In view of the characteristics and difficulties of the manufacturing of large-diameter penstock segments, the utility model provides an auxiliary device for the butt welding of penstock segments and stiffening rings, which solves the manufacturing technical problems and ensures the manufacturing quality, construction period and safety of the segments.

[0006] The technical solutions adopted to achieve the above object are as follows:

[0007] An auxiliary device for welding penstock segments and stiffening rings, characterized in that it includes a segment turning device and a stiffening ring welding work platform; the segment turning device includes a gantry structure, a gantry traveling mechanism, a trolley traveling mechanism, a rigid lifting mechanism and a composite hanger. The gantry traveling mechanism is distributed at both ends of the gantry structure, and is used to control the movement of the gantry structure along the Y axis. The trolley traveling mechanism is installed on the top of the gantry structure, and is slidably engaged with the gantry structure along the X axis. The composite hanger is connected to the bottom of the rigid lifting mechanism through a rotary drive device, and rotates around the bottom of the rigid lifting mechanism under the control of the rotary drive device. The top of the rigid lifting mechanism is fixedly connected to the trolley traveling mechanism, and is used to control the movement of the composite hanger along the Z axis. The stiffening ring welding work platform is installed within the range of movement of the gantry structure, and is used to cooperate with the composite hanger to place and support penstock segments.

[0008] Preferably, the side surface of the portal structure is in the shape of a letter "I", a letter "𠃍" or a letter "冂".

[0009] Preferably, the gantry walking mechanism includes two walking units respectively arranged at both ends of the gantry structure; each single walking unit includes a matching walking track and a walking trolley, the body of the walking trolley is fixedly connected to the gantry structure, and the walking wheels of the walking trolley are slidably engaged with the corresponding walking tracks; a driving motor is connected to the walking trolley of at least one walking unit.

[0010] Preferably, the rigid lifting mechanism includes two sets of hydraulic cylinders that move synchronously.

[0011] Preferably, the composite sling comprises a sling beam, the top of the sling beam is hinged to the rigid lifting mechanism, a plurality of vacuum suction cups are arranged at the bottom of the sling beam, and pipe segment clamping units are arranged at the front and rear sides of the sling beam.

[0012] Preferably, the clamping unit includes a plurality of edge hook units spaced apart along the front and rear edges of the sling beam; the edge hook unit includes an inward-locking telescopic hook and a telescopic drive assembly, the telescopic drive assembly is installed on the sling beam, and the head of the inward-locking telescopic hook is fixedly connected to the telescopic drive assembly.

[0013] Preferably, the stiffening ring welding work platform includes a work base and an arc-shaped vertical bracket, and the arc-shaped vertical bracket is fixed on the work base; the inner circular surface of the arc-shaped vertical bracket is vertically spaced with several rows of fixing parts for fixing the stiffening ring; the front side of the arc-shaped vertical bracket is spaced along the arc line of its inner circular surface.

[0014] Preferably, the arc-shaped vertical support includes a plurality of support units arranged at intervals along the arc line, the support unit includes a vertical support rod for installing a fixing, and a fixed support rod for providing rear support to the vertical support rod, and the vertical support rod, the fixed support rod and the working base constitute a triangular support.

[0015] Preferably, a reverse arc opposite to the arc mirror surface of the inner circular surface of the arc vertical support is planned on the operation base, and a number of segment piers are arranged at intervals along the reverse arc.

[0016] Based on the above technical solution, in the displacement and turnover link of the penstock segments, a composite lifting tool including a vacuum chuck and a clamping unit is used to lift the penstock segments, maintaining the safe and reliable state of the penstock segments during the turnover process. The qualified penstock segments after rolling are stably grabbed by the composite lifting tool, and the penstock segments are lifted off the initial placement platform by a rigid lifting mechanism. The rotation drive device controls the reset lifting tool to rotate 90°, completing the displacement and turnover of the penstock segments. This device can adapt to the lifting, displacement and turnover work of penstock segments with large diameter, thick wall and heavy single-piece weight. In the stiffening ring welding and assembly link, the stiffening ring welding operation platform has the function of fixing the stiffening ring. After rolling, the penstock segments are displaced and turned 90°, lifted to the stiffening ring welding operation platform, and vertically assembled laterally in place. The stiffening ring welding operation platform radially restrains the penstock segments. In the assembly of the stiffening ring link, the weld seam of one side of the stiffening ring is welded. The composite lifting tool grabs and positions for the second time, and the rigid lifting mechanism lifts the penstock segments off the stiffening ring welding operation platform. The rotation drive device controls the composite lifting tool to rotate 180° in the reverse direction. The penstock segments are vertically assembled laterally in place for the second time. The stiffening ring welding operation platform radially restrains the penstock segments, and the weld seam on the other side of the stiffening ring is welded. After passing the inspection, the stiffening ring welding and assembly operation is completed.

[0017] The beneficial effects of the utility model are as follows:

[0018] 1) An auxiliary device for welding and assembling penstock segments and stiffening rings disclosed in this technical solution has a reasonable structure and convenient operation, and can effectively solve technical problems such as large welding workload, difficult precision control and high safety risk brought by the rolling and turnover of penstock segments, stiffening ring welding and rigid constraint, which is of great significance to optimizing the manufacturing process and reducing the manufacturing cost.

[0019] 2) The composite lifting tool realizes rapid lifting through the vacuum chuck, and the clamping unit realizes accurate positioning in the width direction of the penstock segments. At the same time, it can solve the problem of the lateral force bearing capacity during the displacement process of thick and heavy penstock segments. The rigid lifting and turnover compound operation reduces the operation procedures, and can quickly perform multiple displacements and turnovers on the penstock segments, significantly improving the operation efficiency and safety. By setting the stiffening ring welding operation platform, the penstock segments and the stiffening ring are forced to be constrained on the arc vertical support with standard dimensions, significantly improving the overall stiffness during the stiffening ring welding and assembly process. The positioning and welding operation of the stiffening ring can be standardized, improving the manufacturing precision and operation efficiency of the penstock. In summary, the purpose of reducing the construction difficulty, ensuring the manufacturing quality, reducing the labor intensity, improving the efficiency, reducing the cost, shortening the construction period and enhancing the safety is achieved. Description of the Drawings

[0020] Figure 1 It is a front structural schematic diagram of the segment turning device for grasping the penstock segment;

[0021] Figure 2 It is a side structural schematic diagram of the segment turning device for grasping the penstock segment;

[0022] Figure 3 It is a side structural schematic diagram of the segment turning device;

[0023] Figure 4 It is a side structural schematic diagram of the stiffening ring welding operation platform;

[0024] Figure 5 It is a top view structural schematic diagram of the stiffening ring welding operation platform.

[0025] In the figure:

[0026] 1. Gantry structure; 1.1 Fixed beam; 1.2 Frame beam; 2. Trolley traveling mechanism; 3. Rigid lifting mechanism; 3.1 Hydraulic cylinder; 4. Composite lifting tool; 4.1 Lifting tool beam; 4.2 Vacuum sucker; 4.3 Edge hook unit; 5. Rotary drive device; 6. Traveling unit; 6.1 Traveling track; 6.2 Traveling trolley; 6.21 Vehicle body; 6.22 Traveling wheel; 6.3 Drive motor; 7. Operation base; 8. Arc vertical support; 8.1 Vertical support rod; 8.2 Fixed support rod; 9. Segment pier; 10. Fixing piece; 11. Penstock segment; 12. Stiffening ring; 13. Cement column wall surface. Detailed Implementation Modes

[0027] To make the objectives, technical solutions and advantages of the utility model clearer, the technical solutions in the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are some but not all of the embodiments of the utility model.

[0028] Therefore, the detailed description of the utility model provided in the drawings below is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the utility model without creative efforts fall within the scope of protection of the utility model.

[0029] Embodiment 1

[0030] This embodiment discloses an auxiliary device for the welding of the steel pipe segment and the stiffening ring (hereinafter referred to as the welding auxiliary device). As a basic implementation of this technical solution, it includes a segment turning device and a stiffening ring 12 welding operation platform; the segment turning device includes a gantry structure 1, a gantry traveling mechanism, a trolley traveling mechanism 2, a rigid lifting mechanism 3, and a composite sling 4. Among them, the gantry traveling mechanisms are distributed at both ends of the gantry structure 1 and are used to control the movement of the gantry structure 1 along the Y-axis; the trolley traveling mechanism 2 is installed on the top of the gantry structure 1 and is slidably clamped to the gantry structure 1 along the X-axis; the composite sling 4 is connected to the bottom of the rigid lifting mechanism 3 through a rotary drive device 5 and rotates around the bottom of the rigid lifting mechanism 3 under the control of the rotary drive device 5; the top of the rigid lifting mechanism 3 is fixedly connected to the trolley traveling mechanism 2 and is used to control the movement of the composite sling 4 along the Z-axis; the stiffening ring 12 welding operation platform is installed within the moving range of the gantry structure 1 and is used to cooperate with the composite sling 4 to place and support the steel pipe segment 11.

[0031] In the description of this technical solution, the Z-axis, Y-axis, and X-axis are used to illustrate that the segment turning device of this technical solution can move in three perpendicular directions. Based on this, in actual application:

[0032] First step, start the rigid lifting mechanism 3 and lift the composite sling 4 along the Z-axis to a certain height;

[0033] Second step, start the gantry traveling mechanism and control the gantry structure 1, the trolley traveling mechanism 2, the rigid lifting mechanism 3, and the composite sling 4 to move together along the Y-axis until the composite sling 4 reaches above the steel pipe segment 11;

[0034] Third step, start the trolley traveling mechanism 2 and adjust the X-axis position of the rigid lifting mechanism 3 and the composite sling 4 so that the composite sling 4 is directly above the steel pipe segment 11;

[0035] Fourth step, start the rigid lifting mechanism 3 and lower the composite sling 4 along the Z-axis to the surface of the steel pipe segment 11;

[0036] Fifth step, after starting the composite sling 4 to grip the steel pipe segment 11, start the rigid lifting mechanism 3 to lift the composite sling 4 and the steel pipe segment 11 together along the Z-axis to a certain height;

[0037] Sixth step, start the gantry traveling mechanism and control the gantry structure 1, the trolley traveling mechanism 2, the rigid lifting mechanism 3, the composite sling 4, and the steel pipe segment 11 to move together along the Y-axis until the steel pipe segment 11 is sent to a position close to the stiffening ring 12 welding operation platform;

[0038] The seventh step is to start the rotation drive device 5 to rotate the composite hanger 4 together with the pressure steel pipe segment 11 around the bottom of the rigid lifting mechanism 3 by 90 degrees to vertically erect the pressure steel pipe segment 11; wherein, according to the installation structure of the rigid lifting mechanism 3 and the arrangement orientation of the welding work platform of the stiffening ring 12, the composite hanger 4 can be rotated at the connection point with the rigid lifting mechanism 3 with the Y axis or the X axis as the central axis;

[0039] Step 8: Start the gantry travel mechanism and / or the trolley travel mechanism 2, and adjust the position of the pressure steel pipe segment 11 in the X-axis direction and / or the Y-axis direction, so that the pressure steel pipe segment 11 is directly above the placement point of the welding work platform of the stiffening ring 12;

[0040] In the ninth step, the rigid lifting mechanism 3 is started to lower the composite hanger 4 and the pressure steel pipe segment 11 together in the Z-axis direction until the pressure steel pipe segment 11 is accurately placed on the welding work platform of the stiffening ring 12;

[0041] The tenth step is to start the composite hanger 4 to release the grip on the pressure steel pipe segment 11, and then start the gantry travel mechanism to move the gantry structure 1, the trolley travel mechanism 2, the rigid lifting mechanism 3 and the composite hanger 4 together along the Y-axis direction to leave the working area of ​​the stiffening ring 12 welding work platform.

[0042] Finally, the welding of the pressure steel pipe segment 11 and the stiffening ring 12 can be carried out on the stiffening ring 12 welding operation platform.

[0043] Example 2

[0044] This embodiment discloses an auxiliary device for welding penstock segments and stiffening rings (hereinafter referred to as welding auxiliary device), which is a basic implementation scheme of the present technical scheme. Based on Embodiment 1, the side of the portal structure 1 is in the shape of a "I", a "𠃍" or a "冂". The specific structure of the portal structure 1 can be set according to the building structure conditions of the plant. Specifically:

[0045] 1) When there are two parallel cement column walls 13 with a moderate distance between them at the location where the welding auxiliary device is arranged in the factory building, the gantry travel mechanism is arranged on the two cement column walls 13; then an "I"-shaped gantry structure 1 is arranged, and the two ends of the gantry structure 1 are connected to the gantry travel mechanism on the two cement column walls 13. As the main load-bearing component, the gantry structure 1 needs to have sufficient rigidity. Preferably, the "I"-shaped gantry structure 1 can be welded by box beams. Specifically, the "I"-shaped gantry structure 1 includes two parallel "I"-shaped frame beams 1.2, and the ends of the two frame beams 1.2 are welded or bolted by fixed beams 1.1, wherein the frame beam 1.2 and the fixed beam 1.1 are both box beams.

[0046] 2) IfFigures 1 to 3 As shown, when there is a suitable cement column wall 13 at the location where the welding auxiliary device is arranged in the factory, a part of the gantry travel mechanism is arranged on the cement column wall 13, and the other part is arranged on the ground; then a "𠃍"-shaped gantry structure 1 is arranged, one end of the gantry structure 1 is installed on the gantry travel mechanism structure on the cement column wall 13, and the other end is installed on the gantry travel mechanism structure on the ground. The gantry structure 1 is the main load-bearing component, and its structure needs to have sufficient rigidity. Preferably, the "𠃍"-shaped gantry structure 1 can be welded by box beams. Specifically, the "𠃍"-shaped gantry structure 1 includes two "𠃍"-shaped frame beams 1.2. In order to enhance the stability of the gantry structure 1, the tops of the two "𠃍"-shaped frame beams 1.2 are parallel to each other, and the front sides of the two "𠃍"-shaped frame beams 1.2 are installed in a narrow upper and wide lower manner, so that the gantry structure 1 is in an "eight" shape when viewed from the front. Furthermore, the two “𠃍”-shaped frame beams 1.2 are fixed by welding or bolts via the fixed beam 1.1, wherein both the frame beam 1.2 and the fixed beam 1.1 are box beams.

[0047] 3) When there is no cement column wall 13 at the location where the welding auxiliary device is arranged in the factory, the gantry walking mechanism is arranged on the ground; then a "冂"-shaped gantry structure 1 is arranged, and the two ends of the gantry structure 1 are connected to the gantry walking mechanism on the ground. The gantry structure 1 is the main load-bearing component, and its structure needs to have sufficient rigidity. Preferably, the "冂"-shaped gantry structure 1 can be welded by box beams. Specifically, the "冂"-shaped gantry structure 1 includes two "冂"-shaped frame beams 1.2, the tops of the two "冂"-shaped frame beams 1.2 are parallel to each other, and the front and rear sides of the two "冂"-shaped frame beams 1.2 are installed in a narrow upper and wide lower manner, so that the gantry structure 1 is "eight"-shaped when viewed from the front. Furthermore, the two "冂"-shaped frame beams 1.2 are welded or bolted by a fixed beam 1.1, wherein the frame beam 1.2 and the fixed beam 1.1 are both box beams.

[0048] Based on the above structure, the trolley traveling mechanism 2 is specifically slidably connected with the tops of the two frame beams 1.2 of the portal structure 1.

[0049] Example 3

[0050] This embodiment discloses an auxiliary device for butt welding of a penstock segment and a stiffening ring (hereinafter referred to as the butt welding auxiliary device). As a basic implementation of this technical solution, that is, based on Embodiment 1 or 2, the gantry traveling mechanism includes two traveling units 6 respectively arranged at both ends of the gantry structure 1; each single traveling unit 6 includes a matching traveling track 6.1 and a traveling trolley 6.2. The vehicle body 6.21 of the traveling trolley 6.2 is fixedly connected to the gantry structure 1, and the traveling wheels 6.22 of the traveling trolley 6.2 are slidably clamped to the corresponding traveling track 6.1; a driving motor 6.3 is connected to the traveling trolley 6.2 of at least one traveling unit 6.

[0051] Based on the above structure, the stiffening ring 12 welding operation platform can be arranged between the two traveling units 6. Preferably, the stiffening ring 12 welding operation platform is located at a position close to one end of the gantry traveling mechanism. In this way, the position for grasping the penstock segment 11 can be set at a position close to the other end of the gantry traveling mechanism.

[0052] Embodiment 4

[0053] This embodiment discloses an auxiliary device for butt welding of a penstock segment and a stiffening ring (hereinafter referred to as the butt welding auxiliary device). As a basic implementation of this technical solution, that is, based on Embodiments 1, 2 or 3, its rigid lifting mechanism 3 includes several sets of hydraulic cylinders 3.1. The rigid lifting mechanism 3 needs to bear the gravity of the composite spreader 4 and the penstock segment 11, as well as the force generated by the flipping of the composite spreader 4 and the penstock segment 11. Therefore, if only one set of hydraulic cylinders 3.1 is set, its rigidity and stability are limited, which limits the service life. However, if three or more sets of hydraulic cylinders 3.1 are set, not only the cost is increased and resources are wasted, but it is also difficult to control the synchronous movement of all hydraulic cylinders 3.1, and the phenomenon of jamming is likely to occur.

[0054] In summary, preferably, this technical solution sets two sets of hydraulic cylinders 3.1 that move synchronously as the rigid lifting mechanism 3. Specifically, the tops of the two sets of hydraulic cylinders 3.1 are fixedly connected to the trolley traveling mechanism 2, and the bottoms of the two sets of hydraulic cylinders 3.1 are respectively coaxially hinged to the composite spreader 4 through the rotary drive device 5. Specifically, the rotary drive device 5 is a bidirectional synchronous motor. In this way, the housing of the bidirectional synchronous motor is fixedly connected to the hydraulic cylinder 3.1, and the two side rotating shafts of the bidirectional synchronous motor are fixedly connected to the composite spreader 4.

[0055] In this technical solution, when the two sets of hydraulic cylinders 3.1 are arranged at intervals along the Y axis, the bidirectional synchronous motor uses the Y axis as the rotation center axis to control the flipping of the composite spreader 4; when the two sets of hydraulic cylinders 3.1 are arranged at intervals along the X axis, the bidirectional synchronous motor uses the X axis as the rotation center axis to control the flipping of the composite spreader 4.

[0056] Embodiment 5

[0057] This embodiment discloses an auxiliary device for welding penstock segments and stiffening rings (hereinafter referred to as welding auxiliary device), as a basic implementation scheme of this technical solution, that is, based on Embodiment 1, 2 or 3, its rigid lifting mechanism 3 includes two sets of synchronously moving hydraulic cylinders 3.1. Specifically, the tops of the two sets of hydraulic cylinders 3.1 are fixedly connected to the trolley travel mechanism 2, and the bottoms of the two sets of hydraulic cylinders 3.1 are coaxially hinged to the composite sling 4 respectively.

[0058] Based on this, the rotary drive device 5 adopts a matching structure of a gear assembly and a servo motor. The servo motor is installed on the top of the composite hanger 4 and is connected to the hydraulic cylinder 3.1 through the gear assembly.

[0059] Correspondingly, when the two sets of hydraulic cylinders 3.1 are arranged at intervals along the Y-axis, the rotary drive device 5 uses the Y-axis as the rotation center axis to control the flipping of the composite spreader 4; when the two sets of hydraulic cylinders 3.1 are arranged at intervals along the X-axis, the rotary drive device 5 uses the X-axis as the rotation center axis to control the flipping of the composite spreader 4.

[0060] Example 6

[0061] The present embodiment discloses an auxiliary device for welding penstock segments and stiffening rings (hereinafter referred to as welding auxiliary device), which is a basic implementation scheme of the present technical scheme, i.e., based on Embodiments 1, 2, 3, 4 or 5, wherein the composite hanger 4 comprises a hanger beam 4.1, the top of which is hinged to the rigid lifting mechanism 3, a plurality of vacuum suction cups 4.2 are arranged at the bottom of the hanger beam 4.1, and segment clamping units are arranged at the front and rear sides of the hanger beam 4.1.

[0062] Based on this, a vacuum pipe can be laid to connect the vacuum cup 4.2, and a vacuum suction device can be connected to the vacuum pipe to create vacuum adsorption conditions for the vacuum cup 4.2. Preferably, the vacuum pipe can be buried inside the hanger beam 4.1, so that the composite hanger 4 looks clean and tidy, reducing safety hazards.

[0063] In this technical solution, the vacuum suction cup 4.2 is adsorbed on the surface of the pressure steel pipe segment 11 to bear the main lifting load; the segment clamping unit clamps and fixes the pressure steel pipe segment 11 from both sides to bear the corresponding shear force during the flipping process of the pressure steel pipe segment 11.

[0064] Example 7

[0065] This embodiment discloses an auxiliary device for the welding of a penstock segment and a stiffening ring (hereinafter referred to as the welding auxiliary device). As a basic implementation of this technical solution, that is, based on Embodiment 6, its clamping unit includes a number of edge hook units 4.3 arranged at intervals along the front and rear edges of the spreader beam 4.1; the edge hook unit 4.3 includes an inwardly buckling telescopic hook and a telescopic driving component. The telescopic driving component is installed on the spreader beam 4.1, and the head of the inwardly buckling telescopic hook is fixedly connected to the telescopic driving component. Preferably, the telescopic driving component is buried inside the spreader beam 4.1. After the head of the inwardly buckling telescopic hook is inserted into the spreader beam 4.1, it is fixedly connected to the telescopic driving component. The telescopic driving component can be an electric cylinder.

[0066] Preferably, in this technical solution, the telescopic driving component can also be a sliding screw drive mechanism, that is, the sliding screw drive mechanism includes structures such as a motor, a nut, and a ball screw. After the nut is circumferentially limited, by controlling the rotation of the ball screw by the motor, the nut can be made to move linearly on the ball screw. On this basis, by fixedly connecting the inwardly buckling telescopic hook to the nut, the telescopic control of the inwardly buckling telescopic hook can be achieved.

[0067] In actual use, after the inwardly buckling telescopic hook retracts inward to the middle of the spreader beam 4.1, the tail of the inwardly buckling telescopic hook is based on the side surface of the penstock segment 11, and winds from above to below the penstock segment 11 to buckle the penstock segment 11.

[0068] Embodiment 8

[0069] This embodiment discloses an auxiliary device for the welding of a penstock segment and a stiffening ring (hereinafter referred to as the welding auxiliary device). As a basic implementation of this technical solution, that is, based on Embodiments 1, 2, 3, 4, 5, 6, or 7, its stiffening ring 12 welding operation platform includes an operation base 7 and an arc-shaped vertical support 8, and the arc-shaped vertical support 8 is fixed to the operation base 7; on the inner circular surface of the arc-shaped vertical support 8, a number of rows of fixing members 10 for fixing the stiffening ring 12 are vertically installed at intervals; on the front side of the arc-shaped vertical support 8, a number of segment piers 9 are arranged at intervals along the arc of its inner circular surface.

[0070] Before placing the penstock segment 11, first fix the stiffening ring 12 on the arc-shaped vertical support 8. Specifically, each row of fixing members 10 cooperates to fix one stiffening ring 12. After the penstock segment 11 is vertically placed on the segment piers 9, the penstock segment 11 is in close contact with the stiffening ring 12. Among them, the setting of the segment piers 9 realizes the positioning and restraint of the penstock segment 11 while facilitating the withdrawal of the composite spreader 4. Further, in order to ensure the close contact between the stiffening ring 12 and the penstock segment 11, after the penstock segment 11 is placed in place, by knocking a wedge block between the fixing member 10 and the stiffening ring 12, the stiffening ring 12 is forced to be in close contact with the penstock segment 11.

[0071] Furthermore, the arc-shaped vertical support 8 can be formed by welding box girders. Specifically, the arc-shaped vertical support 8 includes a number of support units arranged at intervals along the arc line. The support unit includes a vertical support rod 8.1 for installing the fixing member 10 and a fixing support rod 8.2 for supporting the rear of the vertical support rod. The vertical support rod 8.1, the fixing support rod 8.2 and the operation base 7 form a triangular support. Among them, both the vertical support rod 8.1 and the fixing support rod 8.2 are box girders.

[0072] Embodiment 9

[0073] This embodiment discloses an auxiliary device for welding the steel penstock segment 11 and the stiffening ring 12 (hereinafter referred to as the welding auxiliary device). As a basic implementation of this technical solution, that is, based on Embodiment 8, in order to facilitate welding, on the basis of the original layout structure of the segment pier 9, an additional row of segment piers 9 is arranged at intervals on the reverse arc opposite to it. That is, a reverse arc mirroring the inner circular arc of the arc-shaped vertical support 8 is planned on the operation base 7, and a number of segment piers 9 are arranged at intervals along the reverse arc. Then, two rows of segment piers 9 arranged in mirror symmetry are provided on the operation base 7 of this technical solution.

[0074] Based on the above structure, in actual operation:

[0075] First step, start the rigid lifting mechanism 3 and lift the composite spreader 4 axially in the Z direction to a certain height;

[0076] Second step, start the gantry traveling mechanism, and control the gantry structure 1, the trolley traveling mechanism 2, the rigid lifting mechanism 3 and the composite spreader 4 to move together in the Y direction until the composite spreader 4 reaches above the steel penstock segment 11;

[0077] Third step, start the trolley traveling mechanism 2, and adjust the X-axis position of the rigid lifting mechanism 3 and the composite spreader 4 so that the composite spreader 4 is directly above the steel penstock segment 11;

[0078] Fourth step, start the rigid lifting mechanism 3 and lower the composite spreader 4 axially in the Z direction to the surface of the steel penstock segment 11;

[0079] Fifth step, after starting the composite spreader 4 to grasp the steel penstock segment 11, start the rigid lifting mechanism 3 to lift the composite spreader 4 and the steel penstock segment 11 together axially in the Z direction to a certain height;

[0080] Sixth step, start the gantry traveling mechanism, and control the gantry structure 1, the trolley traveling mechanism 2, the rigid lifting mechanism 3, the composite spreader 4 and the steel penstock segment 11 to move together in the Y direction until the steel penstock segment 11 is sent to a position close to the welding operation platform of the stiffening ring 12;

[0081] The seventh step: The rotary drive device 5 rotates the composite sling 4 together with the penstock segment 11 by 90° around the bottom of the rigid lifting mechanism 3 to vertically stand up the penstock segment 11. Among them, according to the installation structure of the rigid lifting mechanism 3 and the layout orientation of the stiffening ring 12 welding operation platform, the composite sling 4 rotates at the connection point with the rigid lifting mechanism 3 with the Y-axis as the central axis;

[0082] The eighth step: Start the gantry traveling mechanism and / or the trolley traveling mechanism 2, and adjust the position of the penstock segment 11 in the X-axis direction and / or the Y-axis direction so that the penstock segment 11 is directly above the segment placement point of the stiffening ring 12 welding operation platform (that is, on the segment piers arranged at intervals along the arc of the inner circular surface of the front side of the arc-shaped vertical support);

[0083] The ninth step: Start the rigid lifting mechanism 3 to lower the composite sling 4 and the penstock segment 11 together in the Z-axis direction until the penstock segment 11 is accurately placed on the stiffening ring 12 welding operation platform;

[0084] The tenth step: After starting the composite sling 4 to release the grasping of the penstock segment 11, start the gantry traveling mechanism to move the gantry structure 1, the trolley traveling mechanism 2, the rigid lifting mechanism 3 and the composite sling 4 together in the Y-axis direction to leave the working area of the stiffening ring 12 welding operation platform;

[0085] The eleventh step: Weld the weld of one side of the stiffening ring 12;

[0086] The twelfth step: Control the composite sling 4 to grasp and position the penstock segment 11 for the second time, and the rigid lifting mechanism 3 lifts the penstock segment 11 off the stiffening ring 12 welding operation platform;

[0087] The thirteenth step: The rotary drive device 5 controls the composite sling 4 to reverse and rotate 180º, and the penstock segment 11 is vertically assembled laterally for the second time. At this time, the penstock segment 11 is on a row of segment piers 9 arranged at intervals on the reverse arc;

[0088] The fourteenth step: The stiffening ring 12 welding operation platform radially restrains the penstock segment 11, welds the other side weld of the stiffening ring 12, and after passing the inspection, completes the welding operation of the stiffening ring 12.

[0089] Embodiment 10

[0090] This embodiment discloses an auxiliary device for butt welding a steel penstock segment 11 and a stiffening ring 12 (hereinafter referred to as the butt welding auxiliary device). As a basic implementation of this technical solution, that is, based on Embodiment 8, in order to facilitate welding, on the basis of the original layout structure of the segment pier 9, an additional row of segment piers 9 is arranged at intervals on the reverse arc opposite thereto. That is, a reverse arc mirroring the inner circular arc of the arc-shaped vertical support 8 is planned on the operation base 7, and a number of segment piers 9 are arranged at intervals along the reverse arc. Then, two rows of segment piers 9 arranged in mirror symmetry are provided on the operation base 7 of this technical solution.

[0091] Based on the above structure, in actual operation, the butt welding operation between the stiffening ring 12 and the steel penstock segment 11 includes the following steps:

[0092] S1, perform intermittent welding on the first-side weld between the stiffening ring 12 and the steel penstock segment 11.

[0093] S2, cooperate the rigid lifting mechanism 3 with the composite sling 4 to grab the steel penstock segment 11 again, so that the steel penstock segment 11 and the stiffening ring 12 are separated from the welding platform of the stiffening ring 12 together.

[0094] S3, after axially lifting the steel penstock segment 11 welded with the stiffening ring 12 to a set height based on the rigid lifting mechanism 3, start the rotary drive device 5 to cooperate with the composite sling 4 to reversely flip the steel penstock segment 11 by 180°, and then place the steel penstock segment 11 on the segment piers 9 arranged along the reverse arc.

[0095] S4, perform intermittent welding on the second-side weld between the stiffening ring 12 and the steel penstock segment 11, and its intermittent welding structure is symmetrical to the intermittent welding structure of the first-side weld in step 1.

[0096] S5, after repeating the operation in step 2, cooperate the rigid lifting mechanism 3, the rotary drive device 5 and the composite sling 4 to forwardly flip the steel penstock segment 11 by 180°, and then place it on the segment piers 9 arranged along the forward arc.

[0097] S6, perform intermittent repair welding on the first-side weld between the stiffening ring 12 and the steel penstock segment 11.

[0098] S7, after repeating steps 2 and 3, perform intermittent repair welding on the second-side weld between the stiffening ring 12 and the steel penstock segment 11, and its intermittent repair welding structure is symmetrical to the intermittent repair welding structure of the first-side weld in the previous step.

[0099] S8. Repeat steps S255 to S257 until the welded structures of the two side welds between the stiffening ring 12 and the penstock segment 11 are continuous. The welding operation of the stiffening ring 12 and the penstock segment 11 is completed upon passing the inspection.

[0100] In this embodiment, it is considered that if all the welds on one side are welded in a single continuous welding method, the welds on the welded side will shrink, causing the stiffening ring 12 to no longer be perpendicular to the outer wall of the penstock segment 11, and thus the formed size cannot be guaranteed. And this technical solution discloses a welding auxiliary device that supports welding the two side welds between the stiffening ring 12 and the penstock segment 11 by using symmetric intermittent welding in combination with multiple repeated flips, effectively controlling the deformation of the structure.

Claims

1. An auxiliary device for welding penstock segments and stiffening rings, characterized in that: It includes a segment turning device and a stiffening ring (12) welding operation platform; the segment turning device includes a gantry structure (1), a gantry traveling mechanism, a trolley traveling mechanism (2), a rigid lifting mechanism (3) and a composite sling (4); The gantry traveling mechanism is distributively arranged at both ends of the gantry structure (1) and is used to control the movement of the gantry structure (1) along the Y-axis; The trolley traveling mechanism (2) is installed on the top of the gantry structure (1) and is slidably clamped to the gantry structure (1) along the X-axis; The composite sling (4) is connected to the bottom of the rigid lifting mechanism (3) through a rotary drive device (5) and rotates around the bottom of the rigid lifting mechanism (3) under the control of the rotary drive device (5); The top of the rigid lifting mechanism (3) is fixedly connected to the trolley traveling mechanism (2) and is used to control the movement of the composite sling (4) along the Z-axis; The stiffening ring (12) welding operation platform is installed within the movable range of the gantry structure (1) and is used to cooperate with the composite sling (4) to place and support the penstock segment (11).

2. The auxiliary device for welding penstock segments and stiffening rings as claimed in claim 1, characterized in that: The side surface of the gantry structure (1) is in the shape of "一", "𠃍" or "冂".

3. The auxiliary device for welding penstock segments and stiffening rings as claimed in claim 1, characterized in that: The gantry traveling mechanism includes two traveling units (6) respectively arranged at both ends of the gantry structure (1); each single traveling unit (6) includes a matching traveling track (6.1) and a traveling trolley (6.2), the vehicle body (6.21) of the traveling trolley (6.2) is fixedly connected to the gantry structure (1), and the traveling wheels (6.22) of the traveling trolley (6.2) are slidably clamped to the corresponding traveling track (6.1); a driving motor (6.3) is connected to the traveling trolley (6.2) of at least one traveling unit (6).

4. The auxiliary device for welding penstock segments and stiffening rings as claimed in claim 1, characterized in that: The rigid lifting mechanism (3) includes two sets of synchronously moving hydraulic cylinders (3.1).

5. The auxiliary device for welding penstock segments and stiffening rings as claimed in claim 1, characterized in that: The composite sling (4) includes a sling beam (4.1), the top of the sling beam (4.1) is hinged to the rigid lifting mechanism (3), a number of vacuum suction cups (4.2) are arranged at the bottom of the sling beam (4.1), and segment clamping units are arranged on the front and rear sides of the sling beam (4.1).

6. The auxiliary device for welding penstock segments and stiffening rings as claimed in claim 5, characterized in that: The clamping unit includes a number of edge hook units (4.3) arranged at intervals along the front and rear edges of the sling beam (4.1); the edge hook unit (4.3) includes an inward-clamping telescopic hook and a telescopic drive assembly, the telescopic drive assembly is installed on the sling beam (4.1), and the head of the inward-clamping telescopic hook is fixedly connected to the telescopic drive assembly.

7. The auxiliary device for welding penstock segments and stiffening rings as claimed in claim 1, characterized in that: The stiffening ring (12) welding operation platform includes an operation base (7) and an arc-shaped vertical support (8), and the arc-shaped vertical support (8) is fixed to the operation base (7); on the inner circular surface of the arc-shaped vertical support (8), a number of rows of fixing parts (10) for fixing the stiffening ring (12) are vertically arranged at intervals; on the front side of the arc-shaped vertical support (8), a number of segment piers (9) are arranged at intervals along the arc of its inner circular surface.

8. An auxiliary device for welding penstock segments and stiffening rings as claimed in claim 7, characterized in that: The arc-shaped vertical support (8) comprises a plurality of support units arranged at intervals along an arc line, the support unit comprising a vertical support rod (8.1) for mounting a fixing member (10), and a fixed support rod (8.2) for providing rear support for the vertical support rod, the vertical support rod (8.1), the fixed support rod (8.2) and the working base (7) forming a triangular support.

9. The auxiliary device for welding penstock segments and stiffening rings as claimed in claim 7, characterized in that: The working base (7) is provided with a reverse arc line which is mirror-inverse to the arc line of the inner circular surface of the arc-shaped vertical support (8), and a plurality of segment support piers (9) are arranged at intervals along the reverse arc line.

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