Circumferential stiffener assembling device suitable for unequal-diameter penstocks of pumped storage power station

Abstract

The present application relates to the technical field of water resources and hydropower. Disclosed is a circumferential stiffener assembling device suitable for unequal-diameter penstocks of a pumped storage power station. The circumferential stiffener assembling device comprises: a traveling mechanism (1) capable of being adapted to end faces of penstocks with different diameters, and a circumferential stiffener assembling hanger (2) fitting with outer surfaces of the penstocks with different diameters, wherein the traveling mechanism (1) extends outwards to provide an expansion connecting base (3) connected to the top of the circumferential stiffener assembling hanger (2). The present application has the abilities of position adjustment and movement, and can realize the assembly of circumferential stiffeners with different diameters and different pitches by means of simple adjustment; the circumferential stiffener assembling device travels in a circumferential direction of the penstocks, thereby realizing the assembly of a ring of circumferential stiffener sections; the present application has the function of automatically aligning the circumferential stiffeners during assembly, thus eliminating the procedures of scribing and alignment; and the present application has the ability of automatic seam compression, and can effectively eliminate gaps between the circumferential stiffeners and the outer diameters of penstock walls.

Description

A ring-reinforced assembly device for unequal-diameter pressure steel pipes in pumped storage power stations Technical Field

[0001] This invention relates to the field of water conservancy and hydropower technology, and in particular to a ring reinforcement assembly device suitable for pressure steel pipes of unequal diameter in pumped storage power stations. Background Technology

[0002] Pumped storage power stations utilize the elevation difference between the upper and lower reservoirs to store energy for power generation. The water intake and tailrace systems are equipped with long-distance, high-strength pressure steel pipes. These pressure steel pipes vary in diameter (larger at the top, smaller at the bottom) and wall thickness (thinner at the top, thicker at the bottom) depending on the water head elevation, and in terms of material strength (lower at the top, higher at the bottom), exhibiting characteristics such as variable diameter, various wall thicknesses, and different material strengths. To enhance the rigidity and flow stability of the pressure steel pipes, reinforcing rings, water-blocking rings, and thrust rings are installed on the outer wall of large pressure steel pipes; these are all annular reinforcing plates (commonly known as ring reinforcements).

[0003] The existing technology is as follows:

[0004] ① Use a CNC cutting machine to cut steel plates into rings, or use a bending machine to bend straight plates into rings;

[0005] ② The segmented annular reinforcing plates are pre-assembled on the platform into a complete circle that conforms to the outer diameter of the pipe wall;

[0006] ③Draw the installation position line of the ring reinforcement on the outer wall of the pressure steel pipe according to the installation dimensions and spacing. Hoist the ring reinforcement segment to the outer wall of the pressure steel pipe, align it according to the position line, use a right angle ruler to check the perpendicularity with the pipe wall, and fix it by spot welding with an electric welding machine after it is qualified.

[0007] ④ Move the ring reinforcement along the radial direction by a suitable distance, re-align the position and verticality, and spot weld the unassembled ring reinforcement to fix it.

[0008] ⑤ When the gap between the inner circle of the circumference reinforcement and the outer diameter of the steel pipe is too large, a small gantry structure can be welded on the outer wall of the steel pipe, and a jack can be used to press the circumference reinforcement tightly against the outer wall of the pressure steel pipe to eliminate the gap.

[0009] ⑥ Continue this process until the entire ring reinforcement is assembled and fixed on the outer wall of the steel pipe, forming a complete ring reinforcement ring. This completes the assembly and spot welding of each ring reinforcement on the pressure steel pipe, which is the so-called ring reinforcement assembly process.

[0010] ⑦ Then proceed to the welding process, welding the fillet welds between the outer wall of the steel pipe and both sides of the ring reinforcement, as well as the butt welds of the ring reinforcement, etc.

[0011] Pressure steel pipes can be classified into straight pipes, bends, reducers, and branch pipes according to their shape. Straight pipes are used in the middle, lower, and inclined sections of the water diversion system; bends are used at the corners between the upper, middle, and lower horizontal sections and the upper and lower inclined sections; reducers are used in sections where the pipe diameter gradually changes; and branch pipes are used at the junction of the main pipe in the lower horizontal section and the pump turbine generator motor. Straight pipes account for more than 95% of the total. A single section of a straight pipe is generally 3 meters long, with the ring reinforcement positioned perpendicular to the pipe axis. The number of ring reinforcements is determined by the load during pipe section installation and operation. Depending on the pipe diameter and the number of ring reinforcements, straight pipes are further divided into different typical sections. A single section of 3 meters has 2-4 ring reinforcements, composed of steel pipes of the same specification but different wall thicknesses and the ring reinforcements.

[0012] The pumped-storage power station involves a massive number of pressure steel pipes, and the pipes and reinforcing rings are made of high-strength steel. High-strength steel is heat-sensitive, requiring preheating before welding and insulation after welding. Current assembly methods involve using cranes to lift the reinforcing plates, manual alignment, positioning, inspection, and welding. For such a large number of reinforcing rings, using existing techniques would not only consume significant manpower and cause delays, but also present unforeseen difficulties, such as the restriction on arbitrarily welding seam clamps during assembly, potentially making the process impossible. Therefore, developing new assembly processes and methods is imperative. Summary of the Invention

[0013] The purpose of this invention is to address the problem that the existing method for assembling ring reinforcement of pressure steel pipes is difficult to adapt to the production characteristics of pumped storage power stations, such as large-scale production, variable diameter, multiple wall thicknesses, and high-strength steel materials. There is an urgent need to study an assembly device or equipment that can meet the requirements of assembling ring reinforcement of high-strength pressure steel pipes with different diameters, multiple wall thicknesses, unequal spacing, and high strength. Therefore, this invention proposes an assembly device for ring reinforcement of pressure steel pipes with unequal diameters in pumped storage power stations.

[0014] To achieve the above objectives, the present invention adopts the following technical solution:

[0015] A ring reinforcement assembly device for pressure steel pipes of unequal diameters in pumped storage power stations includes: a walking mechanism that can be adjusted to adapt to the end faces of pressure steel pipes of different diameters, and a ring reinforcement assembly bracket that fits the outer surface of pressure steel pipes of different diameters; the walking mechanism extends outward to be provided with an extension connecting seat that connects to the top of the ring reinforcement assembly bracket.

[0016] Compared with the prior art, the present invention provides a ring reinforcement assembly device suitable for pressure steel pipes of unequal diameter in pumped storage power stations, which has the following beneficial effects.

[0017] 1. This invention has the ability to adjust and move its position. Simple adjustment can meet the assembly of ring bars with different diameters and spacings; it can move along the circumference of the steel pipe to achieve the assembly of the entire ring bar segment.

[0018] 2. This invention has an automatic alignment function for the position of the ring reinforcement assembly, eliminating the need for a marking and alignment process; it also has an automatic seam pressing capability, which can effectively eliminate gaps when there are gaps between the ring reinforcement and the outer diameter of the pipe wall.

[0019] 3. This invention has a simple structure, is easy to operate, improves product quality and saves process time, and has high efficiency and safety. Attached Figure Description

[0020] Figure 1 is a schematic diagram of the inner structure of the present invention.

[0021] Figure 2 is a schematic diagram of the outer structure of the present invention.

[0022] Figure 3 is a top view of the structure of the present invention.

[0023] Figure 4 is a schematic diagram of the structure of the present invention from a bottom view.

[0024] Figure 5 is a schematic diagram of the inner structure of the walking mechanism.

[0025] Figure 6 is a schematic diagram of the lower structure of the walking mechanism.

[0026] Figure 7 is a side view of the alignment plate and the first mounting plate.

[0027] Figure 8 is a schematic diagram of the guide wheel.

[0028] Figure 9 is a schematic diagram of the explosion state of the guide wheel.

[0029] Figure 10 is a schematic diagram of the exploded state of the drive wheel and the second mounting plate.

[0030] Figure 11 is a schematic diagram of the wheel turning radius adjustment cover.

[0031] Figure 12 is a structural schematic diagram of the main beam.

[0032] Figure 13 is a side view of the expansion connector.

[0033] Figure 14 is a structural schematic diagram of the ring reinforcement assembly frame.

[0034] Figure 15 is a schematic diagram of the positioning frame.

[0035] Figure 16 is a schematic diagram of the attached component.

[0036] Figure 17 is a top view of the attached component.

[0037] Figure 18 is a schematic diagram of the exploded state of the attached components.

[0038] Figure 19 is a schematic diagram of the internal thread drive cylinder.

[0039] Figure 20 is a schematic diagram of the structure of the ring-ribbed tray.

[0040] Figure 21 is a schematic diagram of the lower structure of the ring-ribbed tray.

[0041] Figure 22 is a schematic diagram of the second structure of the ring-ribbed tray.

[0042] Figure 23 is a schematic diagram of the usage state of the present invention.

[0043] Figure 24 is a schematic diagram of the usage state of the present invention.

[0044] In the picture:

[0045] 1. Walking mechanism; 11. Main beam; 12. Guide wheel; 13. Drive wheel; 14. Alignment plate; 15. First mounting plate; 16. Second mounting plate; 121. Extension column; 122. Flat wheel; 123. Reinforcing plate; 131. Extension round handle; 132. First positioning screw hole group; 161. Second positioning screw hole group; 2. Ring reinforcement group assembly frame; 21. Main frame body; 22. Vertical beam; 23. Connecting plate; 3. Extension connecting seat; 31. 32. Vertical ear plate; 4. Reinforcing wing plate; 5. Wheel turning radius adjustment cover; 6. Vertical connecting plate; 7. Mating connecting hole; 8. Attachment assembly; 91. Electromagnetic chuck; 10. Arc-shaped attachment plate; 11. Ring rib tray; 12. Rear end plate; 13. Support block; 14. Arc-shaped pressure strip; 15. Upper pressure block; 16. Pressing assembly; 17. Base plate; 18. Internal thread drive cylinder; 19. Lead screw; 10. U-shaped connector; 11. Handwheel; 12. Positioning frame. Detailed Implementation

[0046] Referring to Figures 1-24, a ring reinforcement assembly device suitable for pressure steel pipes of unequal diameter in pumped storage power stations includes: a walking mechanism 1 that can be adjusted to adapt to the end faces of pressure steel pipes of different diameters, and a ring reinforcement assembly bracket 2 that fits the outer surface of pressure steel pipes of different diameters; correspondingly, the walking mechanism 1 extends outward to provide an extension connecting seat 3 that connects to the vertical connecting plate 5 at the top of the ring reinforcement assembly bracket 2.

[0047] The traveling mechanism 1 includes a main beam 11, and guide wheels 12 located on the inner side of the lower end of the main beam 11 and drive wheels 13 located on the outer side. The main beam 11 is a long strip structure made of rectangular steel pipe. Two guide wheels 12 and two drive wheels 13 are each located near both ends of the main beam 11 to form a moving support.

[0048] As shown in Figures 1-6, 23, and 24, the guide wheel 12 and the drive wheel 13 work together to guide the movement of the guide wheel on the upper circumference of the pressure steel pipe. The drive wheel 13 provides power, while the inner guide wheel 12 passively rolls or remains stationary on the inner circumference surface of the pressure steel pipe and can also act as a limit and safety device when tilting occurs.

[0049] As shown in Figures 8 and 9, the guide wheel 12 includes a vertically arranged extension column 121 and a flat wheel 122 rotatably arranged at the lower end of the extension column 121. The flat wheel 122 has a groove for cooperating with the bearing and the elastic retaining ring. The end of the extension column 121 has a groove for cooperating with the elastic retaining ring.

[0050] Specifically: the extension column 121 is a vertical round steel bar, and the lower end of the round steel bar is machined with a boss, a small cylinder, a groove, etc.; two deep groove ball bearings with dust covers are installed on the small cylinder, and the bottom bearing is fixed by a shaft elastic retaining ring installed through the shaft end groove; at the same time, the outer surface of the flat wheel 122 is a short cylinder, and the inside is a stepped hole with large ends and small middle. An annular groove is machined on the inner hole near the end face for mounting the bearing with the elastic retaining ring.

[0051] Furthermore, a stiffening plate 123 is provided on the outer side of the extension column 121. Preferably, except for the side near the inner wall of the steel pipe, three right-angled trapezoidal stiffening plates are axially arranged at 90° intervals along the outer diameter of the vertical round steel to enhance the rigidity of the guide seat; the vertical round steel and the right-angled trapezoidal stiffening plates are connected as a whole by welding.

[0052] In some embodiments, the guide wheel 12 is adjusted and installed by cooperating with the main beam 11 through the alignment plate 14.

[0053] The alignment plate 14 is a rectangular flange, which is welded and fixedly connected to the top of the guide wheel 12; the lower sides of both ends of the main beam 11 are fixedly provided with first mounting plates 15 corresponding to the alignment plate 14; the alignment plate 14 and the first mounting plate 15 are respectively provided with multiple sets of elongated positioning holes.

[0054] As shown in Figures 4, 5, 9-11, and 13, both the alignment plate 14 and the first mounting plate 15 have four slotted holes. Simultaneously, multiple positioning lines are provided on the outer sides of both the alignment plate 14 and the first mounting plate 15. For example, two positioning lines are provided on the outer side of the first mounting plate 15, and three are provided on the outer side of the alignment plate 14. Specifically, the positioning lines on the outer side of the first mounting plate 15 are the alignment line and the 6.4-meter hole position line; the positioning lines on the outer side of the alignment plate 14 are the 5.6-meter, 4.8-meter, and 3.4-meter hole position lines. Correspondingly, when these lines correspond to the alignment line, it indicates adjustment to fit the corresponding specification of the pressure steel pipe; when the 5.6-meter hole position line moves further outward to correspond to the 6.4-meter hole position line, it indicates adjustment to fit the 6.4-meter hole position specification of the pressure steel pipe. See the table below for specific correspondences.

[0055] Serial Number | Steel Pipe Inner Diameter | Alignment Plate Hole Position Marking | First Mounting Plate Hole Position Marking Alignment Method | 1. 3.4m | 3.4m | Align the lower hole position line with the upper alignment line | 2. 4.8m | 4.8m | Align the lower hole position line with the upper alignment line | 3. 5.6m | 5.6m | Align the lower hole position line with the upper alignment line | 4. 6.4m | 5.6m | 6.4m | Align the upper and lower hole position lines |

[0056] In addition, the first mounting plate 15 is also a rectangular flange; a reinforcing triangular plate connecting the main beam 11 and the first mounting plate 15 is provided above the first mounting plate 15.

[0057] During processing and manufacturing, the main beam 11 is made of a rectangular steel pipe of appropriate length, and two rectangular flanges are welded to the bottom of both ends of the rectangular steel pipe as the first mounting plate 15. Preferably, the flanges are arranged asymmetrically with the rear longer than the front of the rectangular pipe axis, and the flanges are provided with long holes of the same diameter, equal spacing and different lengths as the upper flange (alignment plate 14) of the guide wheel 12, so as to realize the bolt fixing of the two.

[0058] In some embodiments, the drive wheel 13 is arranged on the lower outer side of the main beam 11 to provide power for circumferential movement along the upper end of the pressure steel pipe and position locking; its angle is adjustable to accommodate different circumferential movements of the steel pipe.

[0059] The drive wheel 13 is a DC drive wheel assembly, which is produced by many domestic manufacturers; directly purchasing the corresponding specifications is sufficient. Requirements: load capacity not less than 1 ton / single wheel, drive power not less than 1 kW / single wheel; preferably, speed 3,000 rpm, reduction ratio 25k, braking torque 8 N.m, integrating motor, reducer, and brake lock into one unit, achieving stepless speed regulation and synchronous movement within the range of 1.3-6 m / min through an electrical control system; the tread of drive wheel 13 has a flange shape on both sides for guiding and limiting movement while stuck on the pipe wall.

[0060] A second mounting plate 16 is provided extending outward from the lower sides of both ends of the main beam 11; the drive wheel 13 is provided with an upwardly extending round handle 131 that connects to the second mounting plate 16. As shown in Figure 10, an upwardly protruding extending round handle 131 is provided above the drive wheel 13, and a central hole is opened on the second mounting plate 16 to cooperate with it.

[0061] Preferably, recesses are provided on the upper and lower surfaces of the second mounting plate 16 to facilitate positioning and installation.

[0062] Correspondingly, the upper end face of the extended round handle 131 is provided with a first positioning screw hole group 132, and the upper end face of the second mounting plate 16 is provided with a second positioning screw hole group 161; the first positioning screw hole group 132 and the second positioning screw hole group 161 are each composed of a plurality of screw holes arranged in a circumferential manner; the second positioning screw hole group 161 is concentrically arranged with the first positioning screw hole group 132, and the second positioning screw hole group 161 is located outside the first positioning screw hole group 132; the extended round handle 131 extends through to be flush with the upper end face of the second mounting plate 16.

[0063] It also includes: a wheel turning radius adjustment cover 4; the wheel turning radius adjustment cover 4 has through holes corresponding to the first positioning screw hole group 132 and the second positioning screw hole group 161, and bolts are inserted to connect it to the second mounting plate 16 and the extended round handle 131; by controlling the angle between the inner and outer ring holes of the wheel turning radius adjustment cover 4, a wheel angle that is adapted to different pressure steel pipes is formed.

[0064] During fabrication, two base plates (second mounting plates 16) are installed on the inner side of the rectangular flanges (first mounting plate 15) at both ends of the rectangular steel pipe (main beam 11). The base plates are arranged off-center, with stepped vertical holes with recesses on the upper and lower surfaces. The middle hole is used to install the upper extension round handle 131 of the DC drive wheel assembly. The slightly larger lower recess serves as a load-bearing limit, and the upper recess is used to install the wheel rotation radius adjustment cover 4. Four threaded holes are evenly distributed on the stepped surface of the upper recess. According to the matching specifications, the axis of two of the threaded holes is ensured to be parallel to the axis of the 6.4-meter pressure steel pipe and on the same plane. The two sets of threaded holes on the two base plates are symmetrical. At the same time, trapezoidal stiffening plates are installed on both sides of the stepped vertical holes on the base plate in front of the rectangular pipe to ensure the stability of the asymmetrical structure of the main beam.

[0065] As shown in Figure 11, the position of the drive wheel 13 is controlled by different end caps, corresponding to pressure steel pipes of different diameters, to achieve high precision and standardization. Specifically, the wheel rotation radius adjustment cover 4 is circular in shape, with six evenly distributed small holes on the inner ring for connection to the threaded holes (first positioning screw hole group 132) on the end face of the extended circular shank 131 of the upper end of the DC motor drive wheel; and four evenly distributed large holes on the outer ring for connection to the threaded holes (second positioning screw hole group 161) on the recessed platform of the base plate. For example, the included angles between the cross lines of two small holes and two large holes are controlled to be 0°, 1.5346°, 3.5891°, and 9.5871°, respectively, to adjust the rotation radius of the DC motor drive wheel when operating with 6.4-meter, 5.6-meter, 4.8-meter, and 3.4-meter pressure steel pipes.

[0066] Note that this device is used for assembling the ring reinforcement of straight pipe sections of pressure steel pipes; the aforementioned parameters are suitable for steel pipe inner diameters of 3.4 meters, 4.8 meters, 5.6 meters, and 6.4 meters, and wall thicknesses of 20-60 mm; when the wall thickness of the pressure steel pipe is greater than 60 mm, the tread width of the direct motor drive wheel needs to be increased accordingly; at the same time, when the inner diameter of the steel pipe is other different values, the included angle of the hole position of the wheel turning radius adjustment cover 4 needs to be recalculated and processed.

[0067] In some embodiments, the top of the ring rib assembly bracket 2 is provided with a vertical connecting plate 5; the extended connecting seat 3 is provided with multiple sets of elongated mating connecting holes 6 and is marked; the vertical connecting plate 5 is provided with multiple sets of round holes, through which bolts are passed and correspond to the left or right end of the mating connecting holes 6 to form different fitting diameters.

[0068] Specifically, as shown in Figure 14, there are four rows of mating connection holes 6, with four holes in each row. The second and fourth rows are positioned slightly inwards and are staggered from the first and third rows. Thus, the left end of the mating connection holes 6 in the first and third rows corresponds to a diameter of 4.8m, and the right end corresponds to a diameter of 3.4m; the left end of the mating connection holes 6 in the second and fourth rows corresponds to a diameter of 6.4m, and the right end corresponds to a diameter of 5.6m. Correspondingly, as shown in Figure 14, there are two rows of circular holes, with four holes in each row. The connection is achieved using eight bolts.

[0069] Preferably, the extension connector 3 includes two symmetrically arranged vertical ear plates 31 and a reinforcing wing plate 32 for clamping and fixing the two vertical ear plates 31; correspondingly, two vertical connecting plates 5 are provided, corresponding to the inner sides of the extension connector 3; and connecting holes 6 are formed on the vertical ear plates 31.

[0070] During processing and fabrication, two vertical ear plates 31 are symmetrically arranged on the left and right sides of the middle of the outer side of the rectangular steel pipe (main beam 11). Two sets of long holes with equal row spacing, equal column spacing, and unequal length are opened on the ear plates. Each set is arranged with two rows and four columns, totaling eight long holes. The upper set of long holes is located at the rear and is used for adjusting the position of the ring reinforcement assembly bracket 2 when working with 4.8-meter and 3.4-meter pipe diameters. The lower set of long holes is located at the front and is used for adjusting the position of the ring reinforcement assembly bracket 2 when working with 6.4-meter and 5.6-meter pipe diameters. The pipe diameter numbers of each installation position are marked on the outer side of the ear plates. At the same time, two wing plates are set on the upper and lower surfaces of the front end of the ear plates and the upper and lower surfaces of the rectangular steel pipe to enhance the rigidity of the upper beam parts.

[0071] In some embodiments, the ring rib assembly bracket 2 includes: a main frame 21, an attachment component 7 disposed inside the main frame 21, and a ring rib tray 8; the attachment component 7 provides attachment pressure, and the ring rib tray 8 provides positioning, lifting, internal pressure and other functions.

[0072] The attachment component 7 is installed at the upper and lower ends of the inner side of the main frame 21 to ensure balanced and effective force application. One or more ring reinforcement trays 8 are detachably installed on the inner side of the main frame 21, and their specific arrangement depends on the required number and spacing of the ring reinforcements. The ring reinforcement trays 8 are installed through multiple sets of positioning holes opened in the main frame 21; multiple sets of positioning holes are preset to accommodate different ring reinforcement spacings.

[0073] Preferably, the main frame 21 consists of two parallel vertical beams 22 and a number of connecting plates 23 connecting the two vertical beams 22; preferably, the vertical beams 22 are channel steel with openings facing outwards.

[0074] During processing and manufacturing, the main structure of the ring reinforcement assembly frame 2 consists of two 20# channel steels back to back, connected in the middle by several rectangular steel plates; several sets of ring reinforcement tray 8 mounting holes are provided on the front leg foot surface of the channel steel (the surface corresponding to the outer wall of the pressure steel pipe) for adjusting the spacing of the ring reinforcement of the pressure steel pipe.

[0075] In some embodiments, the ring-rib tray 8 includes: a rear end plate 81 with positioning holes, and a support block 82 fixed to the inner end of the rear end plate 81. The rear end plate 81 is a rectangular plate and serves as the mounting base for the entire ring-rib tray 8; it is placed on the front side of the main frame 21 and connected to the main frame 21 by bolts passing through the positioning holes; preferably, the positioning holes are offset upwards to avoid the support block 82.

[0076] As shown in Figure 20, the support block 82 is a short plate, with one on each side of the inner end of the rear end plate 81; or as shown in Figure 22, the support block 82 is a long plate, with one on the inner end of the rear end plate 81.

[0077] Furthermore, a stiffening plate is provided below the support block 82. When the support block 82 is a long plate, the lower end face of the support block 82 can be flush with the lower edge of the rear end plate 81, and no stiffening plate is provided.

[0078] Alternatively, the ring-ribbed tray can be divided into an upper tray and a lower tray; the upper tray adopts the form of two short plate supports, and the lower tray adopts the form of one long plate support; the lower tray is installed at the bottom position.

[0079] The front end of the support block 82 is an arc surface; and the radius is larger than the outer diameter of the pressure steel pipe to be installed (preferably, the radius of the front arc surface of the support block 32 is 10-50mm larger than the inner diameter of the pressure steel pipe with the same inner diameter when the minimum wall thickness is 10-50mm), so that while serving as a ring reinforcement support plate for the pressure steel pipe, it does not contact the outer wall of the pressure steel pipe and does not affect the internal pressure operation.

[0080] In addition, an arc-shaped pressure strip 83 is provided at the upper rear end of the support block 82 to fit the ring rib and provide inward pressure to it. Accordingly, the front end face of the arc-shaped pressure strip 83 is arc-shaped; preferably, its thickness is greater than the thickness of the ring rib, such as slightly larger by 2 to 5 mm.

[0081] It should be noted that the front end face of the arc-shaped pressure strip 83 does not need to be completely in contact with the ring reinforcement; preferably, its front arc radius is set to be equal to the minimum outer diameter of the ring reinforcement with the same inner diameter but different wall thickness that is installed, so that there are at least two contact points for the ring reinforcement with the same inner diameter and different wall thickness, so as to bear the pressure of the pressure steel pipe ring reinforcement.

[0082] In addition, an upper pressure block 84 is provided in the middle of the inner side of the rear end plate 81; there is a height difference between the upper pressure block 84 and the support block 82 to form an annular clamping space; used for the mounting and positioning of the ring reinforcement. To facilitate the insertion of the ring reinforcement, necessary rounded corners are provided at the lower front end of the upper pressure block 84 and other positions.

[0083] It should be noted that the height difference should be greater than the height of the ring reinforcement under normal circumstances, so that the ring reinforcement can be inserted; for example, when the height of the ring reinforcement is 20mm, the height difference should be set to 22~25mm.

[0084] Furthermore, as shown in Figures 20 and 22, a reinforcing plate is provided above the upper pressure block 84.

[0085] In some embodiments, the attachment component 7 includes: an electromagnetic chuck 71 and an arc-shaped attachment plate 72 detachably disposed at the front end of the electromagnetic chuck 71; the electromagnetic chuck 71 provides adsorption force and, in conjunction with the arc-shaped attachment plate 72, positions the entire assembly on the outer wall of the pressure steel pipe, thereby positioning and fixing the assembly and applying inward pressure to the circumferential rib.

[0086] The inner end face of the arc-shaped attachment plate 72 is provided with a countersunk hole, and it is assembled and connected to the inner end face of the electromagnetic chuck 71 by bolts. The arc-shaped attachment plate 72 is a rectangular thin plate with an arc-shaped front. It is available in various specifications, and the radius of the arc is equal to the outer diameter of the corresponding pressure steel pipe, so as to adapt to and fit the outer surface of pressure steel pipes of different diameters. During production, corresponding arc-shaped attachment plates 72 are made for different outer diameters of various pressure steel pipes, and they are replaced during operation.

[0087] It should be noted that, to ensure the adsorption force (no less than two tons) during circumferential reinforcement seam pressing, it is best to achieve arc-shaped contact. The preferred method is to prepare arc-shaped pads for use according to the different outer diameters of the pressure steel pipe. A variety of arc-shaped pad specifications are required. Experiments have confirmed that circumferential reinforcement seam pressing can still be achieved even with a gap between the arc surface and the outer wall of the pressure steel pipe. Therefore, for pressure steel pipes with inner diameters of 3.4 meters, 4.8 meters, 5.6 meters, and 6.4 meters, arc-shaped pads with a minimum wall thickness corresponding to the arc can be made for each inner diameter specification. The smaller arc, fitted onto the larger arc surface, ensures at least two lines of contact.

[0088] The electromagnetic chuck 71 is an externally purchased component. It generates magnetism when the power is turned on or off, causing it to adhere to or detach from the outer wall of the pressure steel pipe. To ensure effectiveness, the adsorption force it generates is not less than two tons. The front end of the electromagnetic chuck 71 is a cuboid, and threaded holes are provided corresponding to the mounting surface of the curved attachment plate 72 for bolt fixing.

[0089] In some embodiments, the rear end of the attachment component 7 is connected to the front end of the clamping component 9, and the attachment component 7 is installed through the clamping component 9.

[0090] Specifically, the clamping assembly 9 includes: a base plate 91 fixed to the rear end of the main frame 21, an internally threaded drive cylinder 92 rotatably engaged with the base plate 91, a lead screw 93 engaged with the internally threaded drive cylinder 92, and a U-shaped connector 94 connected to the inner end of the lead screw 93; an open ear plate is fixedly provided at the rear end of the attachment assembly 7 and is hinged to the U-shaped connector 94 by a pin; the internally threaded drive cylinder 92 is provided with thrust bearings at the inner and outer ends of the base plate 91, and a nut that is threadedly engaged with the internally threaded drive cylinder 92 is provided at the front end of the inner thrust bearing.

[0091] Meanwhile, a handwheel 95 is integrally provided at the outer end of the internal thread drive cylinder 92 for easy operation.

[0092] The lead screw 93 is a machined part, with a fine-pitch thread connecting to a U-shaped connector 94 at one end and a pin for fixation; the other end has a cuboid on its cylindrical surface with a trapezoidal thread in the middle for mounting the internal thread drive cylinder 92. The internal thread drive cylinder 92 and the handwheel 95 are machined parts as a single unit; the internal thread drive cylinder 92 is a hollow stepped shaft with a small outer diameter at the inner end and a large outer diameter at the outer end, and its inner hole is a trapezoidal thread hole consistent with that of the lead screw 93; small cross cylinders of appropriate length are evenly distributed on the cylindrical surface of the large end, and the small cylinders are connected by rings to form the handwheel 95 for manual rotation; the small end of the internal thread drive cylinder 92 is threaded, and thrust bearings are set on both sides of the base plate 91 to realize the rotation adjustment and internal pressure of the handwheel 95.

[0093] In some embodiments, the system further includes a positioning frame 10 located at the front end of the main frame 21 and corresponding to the area above and below the attachment component 7; wherein the positioning frame 10 is composed of multiple channel steels and / or angle irons, which restrict the attachment component 7 to prevent it from moving up and down, thereby improving the overall load-bearing capacity and reliability.

[0094] Preferably, each positioning frame 10 consists of two lower 6.3# channel steels and two upper 40×5mm angle steels, extending to a suitable length towards the outer wall of the pressure steel pipe for load bearing and limiting after the attachment component 7 is installed.

[0095] It should be noted that it also includes an electrical control system to control the DC motor drive wheel and electromagnetic chuck; and can be optionally equipped with a remote control function to increase the convenience and safety of the operation process.

[0096] Please refer to Figure 23; taking a straight pipe section with an inner diameter of φ6.4m×3m and a circumferential rib spacing of 500+1000×2+500 (mm) as an example, the corresponding adjustments to this device are explained.

[0097] 1. Adjustment of the turning radius of the DC motor driven wheel: The inner diameter of the steel pipe is 6.4 meters. The wheel turning radius adjustment cover marked "6.4 meters" is used; the four positioning holes on the outer ring and the six mounting holes on the inner ring are collinear with each other on the same axis of the cross line, and the included angle of the holes is 0°.

[0098] 2. Alignment of the guide wheel's alignment plate hole position: Align the innermost 5.6-meter hole position line of the long hole on the alignment plate with the outermost 6.4-meter hole position line of the long hole on the first mounting plate, and install the bolt, washer, nut, and connector.

[0099] 3. Adjustment of the vertical connecting plate and the hole position of the extension connecting seat: Insert the vertical connecting plate of the ring reinforcement assembly bracket into the inner side of the extension connecting seat and align it with the hole position of the lower row of long holes of the vertical ear plate near the outer wall of the pressure steel pipe. Install the bolt, washer, nut and standard parts. The inner diameter of the assembled pressure steel pipe is 6.4 meters.

[0100] 4. Ring rib tray hole position adjustment: Align the three rows of holes with a spacing of 500+1000×2+500 (mm) on the front foot of the double channel steel of the bracket, and install one lower tray and two upper trays with bolts, washers and nuts.

[0101] 5. Adjustment of the arc-shaped pad of the suction cup clamping assembly; Install or replace the electromagnetic suction cup with an arc-shaped attachment plate with an R3.2 radius, and tighten it with countersunk screws, without leaving any gaps.

[0102] Operating steps and methods for the pressure steel pipe ring reinforcement assembly device: The ring reinforcement cross-section size is δ20×120 (mm), and the material is the same as the corresponding pressure steel pipe material; use CNC cutting to cut into circular segments, or cut into straight strips and then bend them into rings using a bending machine; pre-assemble the ring reinforcement segments on the platform to form a complete circle with an inner circle size of (6400mm + 2 × pipe diameter and wall thickness mm). The maximum distance between the inner circle edge of each ring reinforcement segment and the outer diameter (6400mm + 2 × pipe diameter and wall thickness mm) line of the pressure steel pipe is less than 2.5mm / 1500 chord length. The flatness of each ring reinforcement segment is not greater than 1.2mm. After passing the inspection, each segment is numbered and placed in order nearby for assembly.

[0103] Please refer to Figure 24; the following explanation uses a pressure steel pipe with an inner diameter of 3.4 meters and a height of 3 meters, assembled with two ring reinforcements of 750mm+1500mm+750mm as an example.

[0104] 1. Work Preparation: After the longitudinal seam welding of the 3.4-meter inner diameter pressure steel pipe is completed, it is hoisted onto the assembly platform with the pipe axis placed vertically. Using the roundness support frame installed inside the steel pipe, the diameter difference in the crosshair direction of the pipe diameter and the roundness of both ends are adjusted to meet the specifications. The verticality of the outer wall of the steel pipe is checked in the crosshair direction using a total station or level and theodolite to meet the specifications. The horizontality of the upper end face is adjusted to within ±1mm, which will be used as the track surface for the ring reinforcement assembly device. The preheating device is arranged inside the steel pipe. The preheating temperature for 600Mpa high-strength steel tack welding is generally 80±10℃; the preheating temperature for 800Mpa high-strength steel tack welding is 120±10℃. The specific values ​​are provided by the material supplier and determined by testing. Welding cracks are not allowed.

[0105] 2. Trial run of the ring reinforcement assembly device: After the ring reinforcement assembly device is assembled according to the steps, adjusted to the corresponding diameter and ring reinforcement position, and passes the no-load test, it is hoisted onto the end face of the pipe section; the tread of the DC motor drive wheel is stuck on the pipe wall, the gap between the inner rim of the drive wheel and the inner wall of the steel pipe is checked and adjusted to 2-4mm, and the gap between the guide wheel of the guide limit component and the inner wall of the steel pipe is 1-3mm. The power is turned on and it moves slowly along the circumference. The running speed can be steplessly adjusted through the electrical control system. After one round of trial run without interference, the ring reinforcement assembly process can be carried out.

[0106] Assembly of the ring reinforcement assemblies.

[0107] ① Rotate the upper handwheel to move the arc-shaped attachment plate to fit against the outer wall of the steel pipe. While rotating, observe the gap between the inner edge of the drive wheel and the inner wall of the steel pipe. Lock the position when the gap is equal to 4mm.

[0108] ② Check the distance between the upper ring rib tray and the pipe wall. It is preferable to ensure that it is within the range of 20-50mm. If necessary, it can be adjusted by adding shims.

[0109] ③ Rotate the lower handwheel to move the arc-shaped attachment plate to fit against the outer wall of the steel pipe. When the distance from the lower ring rib tray to the pipe wall is equal to the distance from the upper ring rib tray to the pipe wall, lock the position.

[0110] ④ Operate the electrical control system, lock the position of the drive wheel, turn on the switch of the electromagnetic chuck, and attach the attachment component to the outer wall of the pressure steel pipe to ensure a secure and accurate attachment.

[0111] ⑤ First, hoist the bottommost ring reinforcement segment; manually assist in inserting it into the clamping space above the pallet, and hoist the upper ring reinforcement segments one by one from bottom to top, and insert them into the clamping space above the pallet in the same way;

[0112] ⑥ Two operators work together to simultaneously and in the same direction turn the upper and lower handwheels to move the ring reinforcement tray towards the pipe wall. Stop when you feel the handwheels are under pressure. Check the distance between the hanging bracket channel steel and the outer wall of the steel pipe to ensure that the distance between the upper and lower ends is consistent. Check the gap between the inner diameter of the ring reinforcement and the outer wall of the steel pipe. If the gap is greater than 3mm, operate the handwheels simultaneously again to tighten it until it meets the requirements.

[0113] ⑦ The position and spacing of the ring reinforcement have been set; after the infrared thermometer detects that the preheating temperature of the welding part is qualified, the welder cooperates to spot weld the top and bottom of one end of the already positioned ring reinforcement to the outer wall of the steel pipe.

[0114] ⑧ After completion, operate the upper and lower handwheels simultaneously to move the upper pressure block of the ring reinforcement tray 10~20mm away from the top surface of the ring reinforcement; operate the electrical control system to release the magnetic force of the electromagnetic chuck; turn on the DC motor drive wheel to rotate synchronously in the same direction and move the ring reinforcement assembly device forward 500~1000mm, lock the position of the drive wheel, and then perform ring reinforcement pressing at that point.

[0115] ⑨ Perform step “⑥” to press the ring reinforcement seam. After completion, repeat step “⑦” to spot weld the ring reinforcement. After completion, repeat step “⑧” to disengage the ring reinforcement assembly device. Move forward another 500~1000mm. Repeat the “⑥+⑦+⑧” steps to complete the assembly, spot welding and positioning of this section of ring reinforcement.

[0116] ⑩ Move the ring reinforcement assembly device to the joint of the pressure steel pipe ring reinforcement, insert another ring reinforcement segment, and repeat the above steps until the entire pressure steel pipe ring reinforcement is assembled and fixed. Then proceed to the ring reinforcement welding process for welding. It should be noted that the joint positions of the two ring reinforcements and the distance between them and the longitudinal joint of the pressure steel pipe must be staggered by the specified distance, and must be carried out in accordance with the specifications.

[0117] This device features position adjustment and movement capabilities, allowing for easy assembly of ring reinforcement bars with varying diameters and spacings with simple adjustments. It moves along the circumference of the steel pipe to assemble the entire ring reinforcement segment. It has an automatic alignment function for the ring reinforcement assembly position, eliminating the need for marking and alignment steps. It also has an automatic gap-sealing capability, effectively eliminating gaps between the ring reinforcement bar and the outer diameter of the pipe wall. Its simple structure, convenient operation, improved product quality, and time-saving features result in high efficiency and safety.

[0118] This device, through the combined application of DC motor-driven wheels, electromagnetic chucks, processed parts, and steel structural components, achieves the integrated assembly of ring reinforcements for pressure steel pipes with varying diameters, wall thicknesses, and spacings. It has at least the following uses and effects:

[0119] 1. Adjust and adapt to the assembly of ring reinforcement for pressure steel pipes of various diameters; after the installation spacing of the drive wheel 13 is set, it is equal to a fixed chord length; when installed on the end face of pressure steel pipes of different diameters, the corresponding slewing radius, chord height, and position of the guide limit component will all have different values; by setting different positioning angles of the wheel slewing radius adjustment cover 4, the ring reinforcement assembly device can travel tangentially along different radii of curvature; the connecting parts adopt a combination of staggered long holes, which reduces the length of the connecting parts and meets the multi-position adjustment function; realizes the integrated assembly of ring reinforcement for pressure steel pipes of varying diameters, multiple wall thicknesses, and different spacings with one device;

[0120] 2. Simultaneous assembly of multiple ring reinforcements improves efficiency; by setting multiple ring reinforcement trays 8, multiple ring reinforcements of a single pressure steel pipe can be assembled at one time, improving work efficiency;

[0121] 3. The grooved tread of the drive wheel and the guide and limiting components ensure the safety of the operation process; the drive wheel 13 is a grooved track wheel design, and the raised wheel rims on both sides can play a limiting role; the guide wheel 12 extends into the inner wall of the pressure steel pipe for guidance and limiting, ensuring the safety of the device when the center of gravity is off-center.

[0122] 4. The same electromagnetic chuck can meet the adsorption force of different steel pipe outer diameters; by adding a replaceable arc-shaped pad to the working surface of the cuboid electromagnetic chuck, the electromagnetic adsorption force when steel pipes of different pressure outer diameters are fitted together is guaranteed.

[0123] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A ring-fillet assembling device for unequal-diameter penstocks of pumped storage power stations, characterized in that, The utility model relates to a walking mechanism (1) adjustable to adapt to the end face of pressure steel pipe of different diameters and a ring rib group assembly hanging frame (2) adhering to the outer surface of pressure steel pipe of different diameters. The walking mechanism (1) is provided with an extended connecting seat (3) extending outward and connected with the top of the ring rib group assembly hanging frame (2). The top of the ring rib group assembly hanging frame (2) is provided with a vertical connecting plate (5).

2. The assembling device for different diameter spiral rings of penstock of pumped storage power station according to claim 1, characterized in that, A plurality of long strip-shaped matching connecting holes (6) are formed in the extended connecting seat (3), and a plurality of round holes are formed in the vertical connecting plate (5); a bolt is arranged in the round hole and corresponds to the left end or the right end of the matching connecting hole (6) to form different adaptive diameters. The walking mechanism (1) comprises a main beam (11), a guide wheel (12) arranged on the inner side of the lower end of the main beam (11), and a driving wheel (13) arranged on the outer side of the main beam (11).

3. The assembling device for different diameter steel penstocks ring of pumped storage power station according to claim 1, characterized in that, The guide wheel (12) is installed in cooperation with the main beam (11) through an alignment plate (14). The alignment plate (14) is fixedly connected to the top of the guide wheel (12).

4. The assembling device for different diameter spiral rings of penstock of pumped storage power station according to claim 3, characterized in that, First mounting plates (15) corresponding to the alignment plate (14) are fixedly arranged on the lower sides of the two ends of the main beam (11). A plurality of long strip-shaped positioning holes are formed in the alignment plate (14) and the first mounting plate (15) in correspondence. A plurality of positioning lines are arranged on the outer sides of the alignment plate (14) and the first mounting plate (15). Second mounting plates (16) are arranged on the lower sides of the two ends of the main beam (11) and extend outward; the driving wheel (13) is arranged upward and extends a circular handle (131) connected with the second mounting plate (16).

5. The assembling device for different diameter spiral ring of penstock of pumped storage power station according to claim 3, characterized in that, First positioning screw hole groups (132) are formed in the upper end surface of the circular handle (131), and second positioning screw hole groups (161) are formed in the upper end surface of the second mounting plate (16). The walking mechanism (1) further comprises a wheel rotation radius adjusting cover (4); the wheel rotation radius adjusting cover (4) is provided with through holes corresponding to the first positioning screw hole groups (132) and the second positioning screw hole groups (161), and a bolt is arranged to connect the second mounting plate (16) and the circular handle (131). The ring rib group assembly hanging frame (2) comprises a main frame body (21), an adhering assembly (7) arranged on the inner side of the main frame body (21), and a ring rib tray (8).

6. The device for assembling the ring of the penstock of different diameters of pumped storage power station according to claim 1, characterized in that, The ring rib tray (8) is installed through a plurality of positioning holes formed in the main frame body (21). The adhering assembly (7) comprises an electromagnetic chuck (71) and an arc adhering plate (72) detachably arranged at the front end of the electromagnetic chuck (71).

7. The assembling device for different diameter spiral ring of penstock of pumped storage power station according to claim 6, characterized in that, The adhering assembly (7) is installed through a pressing assembly (9).

8. The assembling device for different diameter spiral ring of penstock of pumped storage power station according to claim 6, characterized in that, The pressing assembly (9) comprises a base plate (91) fixed at the rear end of the main frame body (21), an internally threaded driving cylinder (92) rotationally connected with the base plate (91), a lead screw (93) connected with the internally threaded driving cylinder (92), and a U-shaped joint (94) connected with the inner end of the lead screw (93). An hand wheel (95) is integrally arranged at the outer end of the internally threaded driving cylinder (92). The ring rib tray (8) comprises a rear end plate (81) provided with positioning holes and a supporting block (82) fixed at the inner end of the rear end plate (81).

9. The assembling device for different diameter spiral ring of penstock of pumped storage power station according to claim 6, characterized in that, ​ 10. The assembling device for different diameter spiral rings of penstock of pumped storage power station according to claim 9, characterized in that, The upper rear end position of the supporting block (82) is provided with an arc-shaped pressing strip (83); The inner middle position of the rear end plate (81) is provided with an upper pressing block (84).

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