A device and method for hoisting large reactors in high-voltage AC withstand voltage test

Abstract

The present invention discloses a device and method for hoisting large-scale reactors in high-voltage AC withstand voltage tests, which relates to the field of hoisting and lifting technology, and includes: a connecting arm, which is installed at the bottom of a connecting seat, and a hydraulic assembly is configured on one side of the connecting arm to connect with the connecting arm; a mounting frame, which is fixed to the bottom of the connecting seat, and a driving member is configured inside the mounting frame to pull a steel wire rope; a pulling end, through which a steel wire rope passes and pulls the reactor, and a retractable slide is configured at the pulling end, which extends from the contact position between the pulling end and the reactor to the inside of the reactor, and a first roller and a second roller are configured on the inner side of the pulling end and the slide respectively. The present application pulls and fixes the upper and lower parts of the reactor, and during the hoisting process, adjusts the hoisting point by changing the clamping state of the pulling end for the steel wire rope, and adjusts the hoisting state of the reactor according to the change of the hoisting point.

Description

Technical Field

[0001] The present invention relates to the technical field of hoisting and lifting, and in particular to a device and method for hoisting a large-scale reactor in a high-voltage AC withstand voltage test. Background Art

[0002] High-voltage AC withstand voltage testing of medium and large reactors is designed to ensure their reliability and durability in high-voltage AC environments. This testing typically includes the following aspects: Voltage withstand test: Verifies that the reactor can operate normally under high voltage without breakdown or damage; Insulation withstand test: Evaluates the wear and aging resistance of the reactor's insulation material under high-voltage AC; Temperature withstand test: Tests the temperature range of the reactor under high-voltage AC to ensure its stability at different temperatures; Mechanical withstand test: Evaluates the mechanical strength and shock resistance of the reactor under high-voltage AC.

[0003] Announcement No. CN117800209B discloses equipment for lifting large-scale reactors for ultra-high voltage 1100kV GIS AC withstand voltage test, including: a frame, a mounting frame is coaxially arranged at the bottom of the frame, and the upper end of the mounting frame is rotatably mounted on the frame; an internal drive unit is installed in the frame, and the output end of the internal drive unit is connected to the mounting frame through gear meshing for transmission; a lifting ring is sleeved and fixed to the outside of the frame, and a plurality of lifting ropes are distributed circumferentially on the lifting ring, and a lifting fixture is arranged above the frame, and the lifting fixture is connected to one end of each lifting rope; a connecting frame is circumferentially arranged on the mounting frame, and telescopic booms are installed on the connecting frame, and the telescopic booms can rotate relative to each other, and a hydraulic rod is provided on the connecting frame, and the telescopic end of the hydraulic rod is connected to the telescopic boom; a lifting fixture mechanism is installed at one end of each telescopic boom; and a steady-state counterweight assembly, the star-shaped lifting fixture structure adopted can improve the lifting stability during the reactor lifting.

[0004] However, there is still a problem in the process of hoisting the reactor. First, due to the heavy weight and complex structure of medium and large reactors, it is difficult to determine the center of gravity of medium and large reactors before hoisting. The reactor needs to be hoisted until it is completely off the ground, and then the center of gravity of the reactor needs to be determined based on the tilt state of the reactor. Based on this situation, the center of gravity of the reactor will be offset after it is completely off the ground. As shown in the above-mentioned hoisting equipment, the center of gravity is not determined before the reactor is hoisted. No other objects can be present near the reactor when it is hoisted to prevent the reactor from colliding with objects and causing damage to the reactor or the object. Summary of the Invention

[0005] One of the purposes of the present invention is to provide a lifting device and method for large-scale reactors in high-voltage AC withstand voltage tests, which can more quickly determine the center of gravity position of the reactor during lifting and adjust the lifting posture of the lifting device according to the center of gravity position.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A lifting device for large-scale reactors for high-voltage AC withstand voltage tests, comprising a connecting base that can be connected to a crane or a boom, a connecting piece configured inside the connecting base, and the connecting piece is used to fix the connecting base to the crane or the boom;

[0007] The lifting device also includes:

[0008] The connecting arm is mounted on the bottom of the connecting base. A hydraulic assembly is configured on one side of the connecting arm to connect with the connecting arm. The connecting arm is configured to rotate relative to the connecting base. The hydraulic assembly changes the extension state of the connecting arm and can swing with the connecting arm. A steel wire rope is configured on the end of the connecting arm that extends outward, and the steel wire rope extends vertically toward the ground.

[0009] A mounting frame is fixed to the bottom of the connecting seat, and a driving member is configured inside the mounting frame for pulling the wire rope;

[0010] A pulling end, through which the steel wire rope passes and pulls the reactor, is provided with a retractable slide, which extends from the contact position between the pulling end and the reactor to the inside of the reactor, and a first roller and a second roller are provided on the inner side of the pulling end and the slide respectively;

[0011] Each connecting arm is correspondingly equipped with at least two pulling ends, and the two pulling ends are arranged up and down. The first roller is swingably arranged, and the first roller swings to clamp the wire rope. When the upper pulling end clamps the wire rope through the first roller, the lifting point is located at the upper pulling end position. When the lower pulling end clamps the wire rope through the first roller, the lifting point is located at the lower pulling end position.

[0012] In one or more embodiments of the present invention, a chuck is provided at one end of the connecting arm extending to the inside of the connecting seat. The connecting arm can be rotatably installed in the connecting seat. A servo motor is configured inside the connecting seat and is fixed inside the connecting seat. A gear is installed at the output end of the servo motor. The gear is engaged with the chuck. The rotation of the servo motor drives the chuck to rotate through the gear, and the rotation of the chuck changes the angle of the connecting arm.

[0013] In one or more embodiments of the present invention, the slide plate can be slidably mounted on the inner side of the pulling end, and both the slide plate and the pulling end are provided with through holes, and bolts are arranged in the through holes to fix the slide plate and the pulling end;

[0014] A retractable card plate is provided inside the pulling end, one end of the card plate is provided as an elastic end, the elastic end contacts the bolt, and a spring is provided at one end of the card plate extending inside the pulling end for supporting the card plate;

[0015] A limit frame is configured inside the pulling end for limiting the position of the card plate. One end of the limit frame extends to the outside of the pulling end, and the other end of the limit frame is magnetically set. When the limit frame is pulled outward, it limits the card plate from popping outward. The second roller is rotatably installed on the inner side of the skateboard.

[0016] In one or more embodiments of the present invention, the pulling end includes:

[0017] A pulling frame, a slide plate is arranged at the bottom of the pulling frame, a swingable guard plate is arranged on the outside of the pulling frame, a first roller is rotatably mounted on the inside of the guard plate, and a micro telescopic rod is arranged inside the pulling frame, and the micro telescopic rod is extended and retracted to control the swing angle of the guard plate;

[0018] The stretching frame connects the pulling frame and the guard plate, and the two ends of the stretching frame are rotatably connected to the guard plate and the pulling member, and the two ends of the stretching frame extend outward, and the steel wire rope passes through the middle of the stretching frame;

[0019] The auxiliary wheel is rotatably installed inside the stretching frame. A clamping block is arranged on the outside of the auxiliary wheel. When the guard plate swings toward the pulling frame, the clamping block approaches the auxiliary wheel, and the clamping block, the auxiliary wheel, and the auxiliary wheel and the first roller form a clamp for the wire rope.

[0020] In one or more embodiments of the present invention, the pulling end further comprises:

[0021] The positioning wheel is installed inside the pulling frame and is used to change the winding state of the wire rope;

[0022] A pinch plate is swingably arranged on one end of the pulling frame facing the reactor, a first swing frame is arranged inside the pinch plate, one end of the first swing frame is mounted on the side of the pinch plate facing the pulling frame through a rotating shaft, and the middle portion of the first swing frame is connected to the electric telescopic rod and can swing relative to the electric telescopic rod;

[0023] A second swing frame, one end of which is close to the first swing frame and is connected to the first swing frame via a rotating shaft, and the other end of the second swing frame extends into the interior of the pulling frame;

[0024] The guide groove is opened inside the pulling frame and limits the movement path of the second swing frame, and the second swing frame extends into the guide groove.

[0025] In one or more embodiments of the present invention, a pressure plate is disposed inside the gusset plate. The pressure plate is L-shaped and connected to the gusset plate via a rotating shaft. The pressure plate can rotate relative to the gusset plate. A long groove is provided inside the gusset plate. The rotating shaft is located in the long groove and contacts the inner wall of the long groove.

[0026] The top groove is formed inside the gusset plate, and the outer side of the pressure plate extends outward to form a convex block, which is adapted to the top groove. When the rotating shaft is at one end of the long groove, the rotating shaft and the pressure plate can rotate relative to the gusset plate. When the convex block enters the top groove and the rotating shaft moves to the other end of the long groove, the convex block is restricted by the top groove.

[0027] The surfaces of the pressure plate and the buckle plate close to the reactor are both equipped with wear-resistant sheets, which are fixed to the outer walls of the pressure plate and the buckle plate respectively.

[0028] In one or more embodiments of the present invention, the driving member includes:

[0029] The winding disc is rotatably mounted inside the mounting frame, a driving disc is configured on the top of the winding disc, and an engaging wheel is configured on the top of the winding disc. The engaging wheel engages with the driving disc, and the driving disc rotates to drive the winding disc to rotate through the engaging wheel.

[0030] The connecting shaft is arranged in the middle of the winding disk, the meshing wheel is sleeved on the outside of the connecting shaft, and a ratchet group is arranged between the connecting shaft and the winding disk;

[0031] The winding motor is fixed to the bottom of the mounting frame and drives the winding reel to rotate.

[0032] In one or more embodiments of the present invention, the drive disk is composed of a drive motor and a disk body. The drive motor is installed inside the mounting frame. The disk body is connected to the output end of the drive motor. The output end of the drive motor rotates to drive the disk body to rotate.

[0033] The meshing teeth are arranged on the inner side of the disc body and mesh with the meshing wheel. The meshing teeth are internal teeth and the meshing wheel is external teeth. When the disc body rotates, the meshing wheel meshed with the meshing teeth is driven to rotate.

[0034] In one or more embodiments of the present invention, an inclination sensor is configured inside the pulling frame, and the inclination sensor obtains the inclination angle and inclination state of the pulling frame. A buckle is configured at the end of the skateboard extending outward, and the buckle is integrated with the skateboard. The buckle is used for the fixing belt to pass through to fix the inductor.

[0035] The present application also provides a method for hoisting a medium-to-large reactor, which is used in the above-mentioned hoisting device and includes the following steps:

[0036] The wire rope is loosened to an appropriate length and the connecting arm is unfolded;

[0037] The upper and lower pulling ends are respectively installed on the upper and lower parts of the reactor;

[0038] The driving component reels the wire rope and pulls the reactor through the wire rope;

[0039] Determine the angle of the reactor, adjust the clamping state of the pulling end on the wire rope, and determine the lifting point;

[0040] Lift the reactor and adjust the balance of the reactor after it reaches a certain height;

[0041] Transport to the test location and lower the reactor.

[0042] Through the above technical solution, the present invention has the following beneficial effects:

[0043] 1. This application fixes the upper and lower parts of the reactor by pulling. During the lifting process, the lifting point is adjusted by changing the clamping state of the pulling end for the wire rope. The lifting state of the reactor is adjusted according to the change of the lifting point, avoiding the problem of lateral displacement of the reactor due to the uncertain center of gravity position during the lifting process.

[0044] 2. By using wire rope hoisting in conjunction with the inclination sensor, when the reactor is offset, the pulling state of each pulling end is adjusted according to the inclination state of the pulling end monitored by the inclination sensor, so that the reactor can move upward smoothly when it leaves the ground without causing lateral displacement.

[0045] 3. Using the pulling end that can clamp the wire rope, the upper and lower pulling ends can be installed on the upper and lower parts of the reactor respectively when in use. When lifting with the wire rope, the pulling ends at different positions clamp the wire rope, which can change the lifting point and thus adjust the center of gravity of the reactor when it is lifted.

[0046] 4. During lifting, a single wire rope can be adjusted according to the tilt state of the reactor, and multiple wire ropes can be operated simultaneously for synchronous lifting.

[0047] Other features and advantages of the present invention will be described in the following description, and part of them will become obvious from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 A perspective view of the present invention;

[0049] Figure 2 This is a schematic diagram of the structure of the present invention with the connection seat removed;

[0050] Figure 3 This is a schematic diagram of the position of the connecting arm of the present invention;

[0051] Figure 4 This is a schematic diagram of the structure of a single steel wire rope of the present invention;

[0052] Figure 5 This is a schematic diagram of the installation structure of the connecting seat and the mounting frame of the present invention;

[0053] Figure 6 This is a schematic diagram of the internal structure of the connecting base of the present invention;

[0054] Figure 7 It is a schematic diagram of the mounting frame structure of the present invention;

[0055] Figure 8A bottom view of the drive disc of the present invention;

[0056] Figure 9 This is an exploded view of the winding motor connection structure of the present invention;

[0057] Figure 10 This is a schematic diagram of the connection structure between the pulling end and the steel wire rope of the present invention;

[0058] Figure 11 It is a schematic diagram of the pulling end of the present invention;

[0059] Figure 12 is a cross-sectional view of the stretching frame of the present invention;

[0060] Figure 13 It is a schematic diagram of the partial structure of the stretching frame of the present invention;

[0061] Figure 14 The cross-sectional plane of the stretching frame of the present invention is Figure 1 ;

[0062] Figure 15 The cross-sectional plane of the stretching frame of the present invention is Figure 2 ;

[0063] Figure 16 Schematic diagram of the gusset plate structure of the present invention Figure 1 ;

[0064] Figure 17 Schematic diagram of the gusset plate structure of the present invention Figure 2 ;

[0065] Figure 18 It is a schematic diagram of the pressing plate structure of the present invention;

[0066] Figure 19 It is a schematic diagram of the structure of the skateboard of the present invention;

[0067] Figure 20 It is a schematic diagram of the limiting frame structure of the present invention.

[0068] In the figure: 1 connecting base, 2 connecting arm, 3 hydraulic assembly, 4 wire rope, 5 mounting frame, 6 driving member, 7 pulling end, 8 slide plate, 9 first roller, 10 second roller;

[0069] 21 chuck, 22 servo motor, 23 gear;

[0070] 81 through hole, 82 bolt, 83 clamping plate, 84 spring, 85 limit frame;

[0071] 71 pulling frame, 72 guard plate, 73 mini telescopic rod, 74 stretching frame, 75 auxiliary wheel, 76 clamping block, 77 positioning wheel, 78 gusset plate, 79 first swing frame, 710 second swing frame, 711 electric telescopic rod, 712 guide groove;

[0072] 781 pressure plate, 782 long groove, 783 top groove, 784 protrusion, 785 wear-resistant sheet;

[0073] 61 reel, 62 drive disc, 63 meshing wheel, 64 connecting shaft, 65 ratchet assembly, 66 reel motor;

[0074] 621 driving motor, 622 disk body, 623 meshing teeth;

[0075] 11. Inclination sensor, 12. Buckle. DETAILED DESCRIPTION

[0076] The following drawings illustrate various embodiments of the present invention. For clarity, many practical details are included in the following description. However, it should be understood that these practical details are not intended to limit the present invention. In other words, in some embodiments of the present invention, these practical details are optional. Furthermore, features from different embodiments may be interchangeably applicable, where practically possible.

[0077] Unless otherwise defined, all terms used herein (including technical and scientific terms) have their ordinary meanings as understood by those skilled in the art. Furthermore, the definitions of the aforementioned terms in commonly used dictionaries should be interpreted in the context of this specification as consistent with the meanings in the art relevant to the present invention. Unless otherwise explicitly defined, these terms should not be interpreted as having idealized or overly formal meanings.

[0078] The following explains the relationships and terms used in this application:

[0079] Parallel: The parallel defined in this application is not limited to absolute parallelism. This definition of parallelism can be understood as basic parallelism, allowing for situations where the two sides are not absolutely parallel due to factors such as assembly tolerance, design tolerance, and the influence of structural flatness. Small angle errors are allowed. For example, within an assembly error range of 10 degrees, it can be understood as a parallel relationship.

[0080] Vertical: The vertical defined in this application is not limited to an absolute vertical intersection relationship (angle of 90 degrees). It allows for non-absolute vertical intersection relationships caused by factors such as assembly tolerance, design tolerance, and structural flatness. It allows for errors in a small angle range. For example, the assembly error range of 80 to 100 degrees can be understood as a vertical relationship.

[0081] Floor: The floor defined in this application is not limited to a specific material or location. It only needs to be a platform for supporting the application, and it can be stacked, tilted, and have varying flatness. For example, cement floors, tile floors, work platforms, etc. can all be interpreted as floors.

[0082] The above explanation does not fully include the relationship definitions given in this application, but only represents part of it.

[0083] The present invention provides a hoisting device for medium and large reactors in a high-voltage AC withstand voltage test, which is used to hoist medium and large reactors during a high-voltage AC withstand voltage test and more quickly determine the center of gravity of the reactor.

[0084] See Figure 1-4 As shown, in one embodiment, the hoisting device includes a connecting base 1 that can be used to connect with a crane or a boom, and a connecting piece is configured inside the connecting base 1, and the connecting piece is used to fix the connecting base 1 on the crane or the boom;

[0085] The lifting device also includes:

[0086] The connecting arm 2 is mounted on the bottom of the connecting base 1. A hydraulic assembly 3 is configured on one side of the connecting arm 2 and connected to the connecting arm 2. The connecting arm 2 is configured to rotate relative to the connecting base 1. The hydraulic assembly 3 changes the extension state of the connecting arm 2 and can swing with the connecting arm 2. A steel wire rope 4 is configured at the end of the connecting arm 2 that extends outward. The steel wire rope 4 extends vertically toward the ground.

[0087] A mounting frame 5 is fixed to the bottom of the connecting base 1, and a driving member 6 is configured inside the mounting frame 5 for pulling the wire rope 4;

[0088] A pulling end 7, through which the steel wire rope 4 passes and pulls the reactor, is provided with a retractable slide 8, which extends from the contact position between the pulling end 7 and the reactor toward the interior of the reactor, and a first roller 9 and a second roller 10 are provided on the inner sides of the pulling end 7 and the slide 8, respectively;

[0089] Each connecting arm 2 is correspondingly configured with at least two pulling ends 7, and the two pulling ends 7 are arranged up and down. The first roller 9 is swingably arranged, and the first roller 9 swings to clamp the wire rope 4. When the upper pulling end 7 clamps the wire rope 4 through the first roller 9, the lifting point is located at the position of the upper pulling end 7. When the lower pulling end 7 clamps the wire rope 4 through the first roller 9, the lifting point is located at the position of the lower pulling end 7.

[0090] In one feasible method, each connecting arm 2 is provided with two pulling ends 7. When lifting, different pulling ends 7 clamp the wire rope 4, change the lifting point corresponding to the connecting arm 2, and use different lifting point combinations to adjust the center of gravity state of the reactor to avoid the problem that the reactor is off the ground and the center of gravity position is offset during direct lifting, resulting in the reactor not moving vertically upward, and the displacement of the reactor causing damage to surrounding objects or the reactor.

[0091] Among them, since the upper and lower pulling ends 7 both determine the lifting point by clamping the wire rope 4, the pulling end 7 can slide on the outside of the wire rope 4 when not clamping the wire rope 4. When lifting the reactor, the pulling end 7 can be clamped at different positions of the reactor and adjusted accordingly according to the design status of the reactor.

[0092] The hydraulic assembly 3 is a hydraulic telescopic rod, which controls the extension state of the connecting arm 2 by extending and retracting the hydraulic telescopic rod. When the hydraulic telescopic rod is pushed out, the connecting arm 2 is extended, and when the hydraulic telescopic rod is retracted, the connecting arm 2 is contracted.

[0093] The driving member 6 is connected to the steel wire rope 4 and controls the winding of the steel wire rope 4 .

[0094] See Figure 5-6 As shown, in one embodiment, a chuck 21 is provided at one end of the connecting arm 2 extending to the inside of the connecting base 1, and the connecting arm 2 can be rotatably installed in the connecting base 1. A servo motor 22 is configured inside the connecting base 1, and the servo motor 22 is fixed inside the connecting base 1. A gear 23 is installed at the output end of the servo motor 22, and the gear 23 is engaged with the chuck 21. The rotation of the servo motor 22 drives the chuck 21 to rotate through the gear 23, and the rotation of the chuck 21 changes the angle of the connecting arm 2.

[0095] In one feasible method, the connecting arm 2 is arranged to be rotatable and changeable in angle, and can be adjusted to different angles during use. Since the structural appearances of different reactors are inconsistent, and the corner positions and suitable lifting positions are different, setting a connecting arm 2 with an adjustable angle can adjust the state of the connecting arm 2 and the pulling end 7 to ensure the stability of the pulling end 7 after being connected to the reactor.

[0096] The hydraulic assembly 3 changes position as the connecting arm 2 swings, ensuring the stability of the hydraulic assembly 3 after being connected to the connecting arm 2, and providing stable support to the connecting arm 2 without hindering the rotation of the connecting arm 2.

[0097] See Figure 11 as well as Figure 19-20 As shown, in one embodiment, the slide plate 8 can be slidably mounted on the inner side of the pulling end 7, and both the slide plate 8 and the pulling end 7 are provided with a through hole 81, and a bolt 82 is disposed in the through hole 81 for fixing the slide plate 8 and the pulling end 7;

[0098] A retractable card plate 83 is provided inside the pulling end 7. One end of the card plate 83 is provided as an elastic end, which contacts the bolt 82. A spring 84 is provided at one end of the card plate 83 extending inside the pulling end 7 to support the card plate 83.

[0099] A limit frame 85 is configured inside the pulling end 7 for limiting the position of the card plate 83. One end of the limit frame 85 extends to the outside of the pulling end 7, and the other end of the limit frame 85 is magnetically set. When the limit frame 85 is pulled outward, it limits the card plate 83 from popping outward. The second roller 10 can be rotatably installed on the inner side of the skateboard 8.

[0100] In one feasible method, a bolt 82 is used to fix the pulling end 7 and the slide 8 to ensure the stability of the position of the slide 8. The through hole 81 provided on the pulling end 7 is provided with a thread, and the bolt 82 cooperates with the thread to fix the slide 8. In order to prevent the bolt 82 from detaching during long-term use, the elastic end of the clamping plate 83 is used to increase the friction force when the bolt 82 rotates.

[0101] Among them, in order to enable the elastic end of the card plate 83 to stably contact the bolt 82, the spring 84 is used to push the card plate 83 outward from the inside of the pulling end 7, and a card slot with the same width as the limit frame 85 is configured in the middle of the card plate 83. The contact surface between the limit frame 85 and the card plate 83 is set as an inclined surface, and the inclined surface is inserted into the card slot to retract the card plate 83 and not contact the bolt 82. The force of the spring 84 to push the card plate 83 outward can clamp the limit frame 85 to ensure the stability of the limit frame 85.

[0102] See Figure 10-14 As shown, in one embodiment, the pulling end 7 includes:

[0103] A pulling frame 71, a slide 8 is provided at the bottom of the pulling frame 71, a swingable guard plate 72 is provided on the outside of the pulling frame 71, a first roller 9 is rotatably mounted on the inside of the guard plate 72, and a micro telescopic rod 73 is provided inside the pulling frame to control the swing angle of the guard plate 72 by telescoping;

[0104] The stretching frame 74 connects the pulling frame 71 and the guard plate 72. The two ends of the stretching frame 74 are rotatably connected to the guard plate 72 and the pulling member, and the two ends of the stretching frame 74 extend outward. The steel wire rope 4 passes through the middle of the stretching frame 74.

[0105] The auxiliary wheel 75 is rotatably mounted inside the stretching frame 74. A clamping block 76 is arranged on the outside of the auxiliary wheel 75. When the guard plate 72 swings toward the pulling frame 71, the clamping block 76 approaches the auxiliary wheel 75. The clamping block 76 and the auxiliary wheel 75 as well as the auxiliary wheel 75 and the first roller 9 form a clamping force on the wire rope 4.

[0106] In one practicable manner, the guard plate 72 is configured to be in a swingable state. When the guard plate 72 is in the two extreme swingable positions, it corresponds to the clamping of the wire rope 4 and the pulling of the wire rope 4. When the guard plate 72 swings toward the pulling frame 71, the interval between the first roller 9 and the auxiliary wheel 75 shrinks, and the gap between the auxiliary wheel 75 and the clamping block 76 shrinks. The wire rope 4 is clamped at multiple points to ensure the stability of the wire rope 4 and prevent the wire rope 4 from slipping and loosening. The micro telescopic rod 73 is connected to the pulling frame 71 and the guard plate 72 respectively, and the micro telescopic rod 73 can swing relative to the pulling frame 71 and the guard plate 72.

[0107] In another embodiment, the micro telescopic rod 73 can be replaced by a hydraulic telescopic rod, which is used to change the swing angle of the guard plate 72 to ensure the stability of the clamping of the wire rope 4. In order to ensure the clamping stability of the wire rope 4, the first roller 9, the auxiliary wheel 75 and the clamping block 76 are all made of rubber, and anti-slip grooves are arranged at the position where the first roller 9, the second roller 10 and the clamping block 76 contact the wire rope 4.

[0108] In order to further ensure the stability of the wire rope 4 after being clamped, the contact angle range of the wire rope 4 and the first roller 9 and the auxiliary wheel 75 is increased, and the friction of the wire rope 4 is further enhanced by increasing the contact area between the wire rope 4 and the first roller 9 and the auxiliary wheel 75.

[0109] See Figure 14-16 As shown, in one embodiment, the pulling end 7 further includes:

[0110] The positioning wheel 77 is installed inside the pulling frame 71 and is used to change the winding state of the wire rope 4;

[0111] The pinch plate 78 is swingably mounted on the end of the pulling frame 71 facing the reactor. A first swing frame 79 is disposed inside the pinch plate 78. One end of the first swing frame 79 is mounted on the side of the pinch plate 78 facing the pulling frame 71 via a rotating shaft. The middle portion of the first swing frame 79 is connected to the electric telescopic rod 711 and can swing relative to the electric telescopic rod 711.

[0112] The second swing frame 710 has one end close to the first swing frame 79 connected to the first swing frame 79 via a rotating shaft, and the other end of the second swing frame 710 extends into the interior of the pulling frame 71;

[0113] The guide groove 712 is formed inside the pulling frame 71 and limits the movement path of the second swing frame 710 . The second swing frame 710 extends into the guide groove 712 .

[0114] In one feasible method, the first swing frame 79 and the second swing frame 710 are combined to limit the position of the pinch plate 78. The pinch plate 78 is controlled to clamp the reactor by the extension and retraction of the electric telescopic rod 711. When the reactor is hoisted, the stability of the connection between the reactor and the pulling end 7 is ensured to avoid the contact between the reactor and the pulling end 7 during hoisting, which may cause the center of gravity of the reactor to shift.

[0115] Among them, the first swing frame 79 and the second swing frame 710 are arranged in a linked manner. Under the telescopic control of the electric telescopic rod 711, the first swing frame 79 and the second swing frame 710 move, and the guide groove 712 is used to limit the second swing frame 710 to determine the movement trajectory of the first swing frame 79 and the second swing frame 710.

[0116] The other end of the pinch plate 78 in contact with the reactor extends to the inside of the pulling frame 71, so that the pinch plate 78 can rotate relative to the pulling frame 71 and can slide relative to the pulling frame 71. The contact between the pinch plate 78 and the reactor can be controlled by pulling the electric telescopic rod 711.

[0117] See Figure 16-18 As shown, in one embodiment, a pressure plate 781 is disposed inside the pinch plate 78. The pressure plate 781 is L-shaped and connected to the pinch plate 78 via a rotating shaft. The pressure plate 781 can rotate relative to the pinch plate 78. A long groove 782 is provided inside the pinch plate 78. The rotating shaft is located in the long groove 782 and contacts the inner wall of the long groove 782.

[0118] The top groove 783 is formed inside the pinch plate 78, and the outer side of the pressure plate 781 extends outward to form a protrusion 784. The protrusion 784 is adapted to the top groove 783. When the rotating shaft is at one end of the long groove 782, the rotating shaft and the pressure plate 781 can rotate relative to the pinch plate 78. When the protrusion 784 enters the top groove 783 and the rotating shaft moves to the other end of the long groove 782, the protrusion 784 is restricted by the top groove 783.

[0119] The surfaces of the pressure plate 781 and the pinch plate 78 close to the reactor are both provided with wear-resistant sheets 785 , and the wear-resistant sheets 785 are fixed to the outer walls of the pressure plate 781 and the pinch plate 78 , respectively.

[0120] In one feasible method, the setting of the pressure plate 781 can hold the reactor while the buckle plate 78 clamps the surface of the reactor. When there is a depression on the inner side of the reactor, the pressure plate 781 can further increase the connection stability between the pulling end 7 and the reactor, and the pulling end 7 will not loosen from the reactor during the lifting process.

[0121] The combination of the long slot 782 and the top slot 783 is used to limit the pressure plate 781 to ensure the stability of the pressure plate 781. When the rotating shaft is at both ends of the long slot 782, it corresponds to the state of the pressure plate 781. When the inductor has a depression that can be used to buckle the inductor with the pressure plate 781, the protrusion 784 is pressed into the top slot 783, and the protrusion 784 is used to cooperate with the top slot 783 to limit the pressure plate 781. When the inductor has no depression, the protrusion 784 is separated from the top slot 783, and the pressure plate 781 will not interfere with the contact of the buckle plate 78 with the inductor.

[0122] See Figure 6-9 As shown, in one embodiment, the driving member 6 includes:

[0123] The winding disc 61 is rotatably mounted inside the mounting frame 5. A driving disc 62 is disposed on the top of the winding disc 61, and an engaging wheel 63 is disposed on the top of the winding disc 61. The engaging wheel 63 engages with the driving disc 62. The driving disc 62 rotates, driving the winding disc 61 to rotate through the engaging wheel 63.

[0124] The connecting shaft 64 is provided in the middle of the winding disk 61, the meshing wheel 63 is sleeved on the outside of the connecting shaft 64, and a ratchet assembly 65 is provided between the connecting shaft 64 and the winding disk 61;

[0125] The winding motor 66 is fixed to the bottom of the mounting frame 5 and drives the winding drum 61 to rotate.

[0126] In one feasible method, by setting up the driving disk 62, the driving disk 62 can be used to simultaneously drive multiple winding disks 61 to rotate simultaneously, and the multiple winding disks 61 can be wound synchronously to achieve the effect of lifting the inductor upward, and each winding disk 61 can be driven by the winding motor 66 to rotate individually, so that the inductor at a certain position can be lifted, and the winding disk 61 can be wound individually, so that the inductor can be adjusted to different tilt states.

[0127] The ratchet assembly 65 consists of an inner ratchet and an outer ratchet. When the connecting shaft 64, acting as the active element, rotates clockwise, it drives the take-up reel 61 to rotate clockwise. However, when the take-up reel 61, acting as the active element, rotates clockwise, the one-way transmission characteristic of the ratchet assembly 65 prevents the take-up reel 61 from driving the connecting shaft 64. This characteristic of the ratchet allows for both independent and synchronized rotation to occur simultaneously without interference.

[0128] See Figure 8-9 As shown, in one embodiment, the driving disk 62 is composed of a driving motor 621 and a disk body 622. The driving motor 621 is installed on the inner side of the mounting frame 5. The disk body 622 is connected to the output end of the driving motor 621. The output end of the driving motor 621 rotates to drive the disk body 622 to rotate.

[0129] The meshing teeth 623 are provided on the inner side of the disc body 622 and mesh with the meshing wheel 63. The meshing teeth 623 are internal teeth and the meshing wheel 63 is external teeth. When the disc body 622 rotates, the meshing wheel 63 meshed with the meshing teeth 623 is driven to rotate.

[0130] In one practicable manner, the disc 622 drives the multiple meshing wheels 63 to rotate synchronously, thereby achieving a synchronous increase in the height of the reactor.

[0131] See Figure 10-11 As shown, in one embodiment, an inclination sensor 11 is configured inside the pulling frame 71, and the inclination sensor 11 obtains the inclination angle and inclination state of the pulling frame 71. A buckle 12 is configured at the end of the skateboard 8 extending outward. The buckle 12 is integrated with the skateboard 8, and the buckle 12 is used for the fixing belt to pass through to fix the inductor.

[0132] In one practicable manner, the arrangement of the buckle 12 can be varied to connect the pulling ends 7 on both sides using a fixing belt to ensure the stability of the connection between the pulling ends 7 and the reactor.

[0133] The present application also provides a method for hoisting a medium-to-large reactor, which is used in the above-mentioned hoisting device and includes the following steps:

[0134] The steel wire rope 4 is loosened to an appropriate length and the connecting arm 2 is unfolded;

[0135] The pulling end 7 is provided at the upper and lower parts of the reactor respectively;

[0136] The driving member 6 reels the steel wire rope 4 and pulls the reactor through the steel wire rope 4;

[0137] Determine the angle of the reactor, adjust the clamping state of the pulling end 7 on the wire rope 4, and determine the lifting point;

[0138] Lift the reactor and adjust the balance of the reactor after it reaches a certain height;

[0139] Transport to the test location and lower the reactor.

[0140] Although the present invention is disclosed in conjunction with the above embodiments, it is not intended to limit the present invention. Anyone familiar with this technology can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the definition of the attached claims.

Claims

1. A device for hoisting large-scale reactors for high-voltage AC withstand voltage tests, comprising a connection seat (1) for connecting to a crane or a boom; characterized in that: The lifting device also includes: A connecting arm (2) is mounted on the bottom of the connecting seat (1). A hydraulic assembly (3) is configured on one side of the connecting arm (2) and is connected to the connecting arm (2). The connecting arm (2) is configured to be rotatable relative to the connecting seat (1). The hydraulic assembly (3) changes the extension state of the connecting arm (2) and can swing along with the connecting arm (2). A steel wire rope (4) is configured on one end of the connecting arm (2) extending outward. The steel wire rope (4) extends vertically toward the ground. A mounting frame (5) is fixed to the bottom of the connecting seat (1), and a driving member (6) is configured inside the mounting frame (5) for pulling the wire rope (4); A pulling end (7), wherein the steel wire rope (4) passes through the pulling end (7) and pulls the reactor through the pulling end (7), the pulling end (7) is provided with a retractable slide plate (8), the slide plate (8) extends from a contact position between the pulling end (7) and the reactor toward the inside of the reactor, and a first roller (9) and a second roller (10) are respectively provided on the inner sides of the pulling end (7) and the slide plate (8); Each connecting arm (2) is correspondingly configured with at least two pulling ends (7), and the first roller (9) is swingably arranged to clamp the wire rope (4). When the upper first roller (9) swings to clamp the wire rope (4), the lifting point is located at the upper pulling end (7); when the lower first roller (9) swings to clamp the wire rope (4), the lifting point is located at the lower pulling end (7).

2. The large-scale reactor hoisting device for high-voltage AC withstand voltage test according to claim 1 is characterized in that: A chuck (21) is provided at one end of the connecting arm (2) extending to the interior of the connecting seat (1). The connecting arm (2) can be rotatably mounted in the connecting seat (1). A servo motor (22) is configured inside the connecting seat (1). The servo motor (22) is fixed inside the connecting seat (1). A gear (23) is installed at the output end of the servo motor (22). The gear (23) is engaged with the chuck (21). The rotation of the servo motor (22) drives the chuck (21) to rotate through the gear (23). The rotation of the chuck (21) changes the angle of the connecting arm (2).

3. A lifting device for large-scale reactors for high-voltage AC withstand voltage test according to claim 2, characterized in that: The slide plate (8) can be slidably mounted on the inner side of the pulling end (7), and both the slide plate (8) and the pulling end (7) are provided with through holes (81). Bolts (82) are arranged in the through holes (81) for fixing the slide plate (8) and the pulling end (7); A retractable card plate (83) is provided inside the pulling end (7), one end of the card plate (83) is provided as an elastic end, the elastic end contacts the bolt (82), and one end of the card plate (83) extending to the inside of the pulling end (7) is provided with a spring (84) for supporting the card plate (83); A limiting frame (85) for limiting the position of the card plate (83) is configured inside the pulling end (7). One end of the limiting frame (85) extends to the outside of the pulling end (7). The other end of the limiting frame (85) is magnetically arranged. When the limiting frame (85) is pulled outward, the card plate (83) is limited to pop outward. The second roller (10) is rotatably mounted on the inner side of the slide plate (8).

4. A lifting device for large-scale reactors for high-voltage AC withstand voltage test according to claim 3, characterized in that: The pulling end (7) comprises: A pulling frame (71), a slide plate (8) is arranged at the bottom of the pulling frame (71), a swingable guard plate (72) is arranged on the outside of the pulling frame (71), a first roller (9) is rotatably mounted on the inside of the guard plate (72), and a micro telescopic rod (73) is arranged inside the pulling frame, and the micro telescopic rod (73) is telescopically controlled to control the swing angle of the guard plate (72); A stretching frame (74) is connected to the pulling frame (71) and the guard plate (72), and the two ends of the stretching frame (74) are rotatably connected to the guard plate (72) and the pulling member, and the two ends of the stretching frame (74) extend outward, and the steel wire rope (4) passes through the middle of the stretching frame (74); The auxiliary wheel (75) is rotatably mounted inside the stretching frame (74). A clamping block (76) is disposed outside the auxiliary wheel (75). When the guard plate (72) swings toward the pulling frame (71), the clamping block (76) approaches the auxiliary wheel (75). The clamping block (76) and the auxiliary wheel (75) as well as the auxiliary wheel (75) and the first roller (9) form a clamping mechanism for the steel wire rope (4).

5. The large-scale reactor hoisting device for high-voltage AC withstand voltage test according to claim 4 is characterized in that: The pulling end (7) further comprises: A positioning wheel (77) is installed inside the pulling frame (71) and is used to change the winding state of the wire rope (4); A pinch plate (78) is swingably arranged on one end of the pulling frame (71) facing the reactor, a first swing frame (79) is arranged on the inner side of the pinch plate (78), one end of the first swing frame (79) is mounted on the side of the pinch plate (78) facing the pulling frame (71) via a rotating shaft, and a middle portion of the first swing frame (79) is connected to the electric telescopic rod (711) and can swing relative to the electric telescopic rod (711); The second swing frame (710) has one end close to the first swing frame (79) connected to the first swing frame (79) via a rotating shaft, and the other end of the second swing frame (710) extends toward the interior of the pulling frame (71); The guide groove (712) is opened inside the pulling frame (71) and limits the movement path of the second swing frame (710), and the second swing frame (710) extends into the guide groove (712).

6. A lifting device for large-scale reactors for high-voltage AC withstand voltage test according to claim 5, characterized in that: A pressure plate (781) is disposed on the inner side of the gusset plate (78), the pressure plate (781) is L-shaped and connected to the gusset plate (78) via a rotating shaft, the pressure plate (781) can rotate relative to the gusset plate (78), a long groove (782) is provided on the inner side of the gusset plate (78), the rotating shaft is located in the long groove (782) and contacts the inner wall of the long groove (782); The top groove (783) is opened inside the buckle plate (78), and the outer side of the pressure plate (781) extends outward to form a protrusion (784). The protrusion (784) is adapted to the top groove (783). When the rotating shaft is at one end of the long groove (782), the rotating shaft and the pressure plate (781) can rotate relative to the buckle plate (78). When the protrusion (784) enters the top groove (783) and the rotating shaft moves to the other end of the long groove (782), the protrusion (784) is restricted by the top groove (783); The surfaces of the pressing plate (781) and the buckle plate (78) close to the reactor are both provided with wear-resistant sheets (785), and the wear-resistant sheets (785) are respectively fixed to the outer walls of the pressing plate (781) and the buckle plate (78).

7. The device for hoisting large-scale reactors for high-voltage AC withstand voltage test according to claim 6, characterized in that: The driving member (6) comprises: A winding disk (61) is rotatably mounted inside the mounting frame (5), a driving disk (62) is configured on the top of the winding disk (61), and an engaging wheel (63) is configured on the top of the winding disk (61), the engaging wheel (63) is engaged with the driving disk (62), and the driving disk (62) rotates to drive the winding disk (61) to rotate through the engaging wheel (63); A connecting shaft (64) is arranged in the middle of the winding disk (61), an engaging wheel (63) is sleeved on the outside of the connecting shaft (64), and a ratchet assembly (65) is arranged between the connecting shaft (64) and the winding disk (61); The winding motor (66) is fixed to the bottom of the mounting frame (5) and drives the winding disc (61) to rotate.

8. The device for hoisting large-scale reactors for high-voltage AC withstand voltage test according to claim 7, characterized in that: The driving disk (62) is composed of a driving motor (621) and a disk body (622). The driving motor (621) is installed on the inner side of the mounting frame (5). The disk body (622) is connected to the output end of the driving motor (621). The output end of the driving motor (621) rotates to drive the disk body (622) to rotate. The meshing teeth (623) are provided on the inner side of the disc body (622) and mesh with the meshing wheel (63). The meshing teeth (623) are internal teeth and the meshing wheel (63) is external teeth. When the disc body (622) rotates, the meshing wheel (63) meshed with the meshing teeth (623) is driven to rotate.

9. The device for hoisting large-scale reactors for high-voltage AC withstand voltage test according to claim 8, characterized in that: The pulling frame (71) is internally provided with an inclination sensor (11), and the inclination sensor (11) obtains the inclination angle and inclination state of the pulling frame (71). The end of the slide plate (8) extending outward is provided with a buckle (12), and the buckle (12) is integrally provided with the slide plate (8). The buckle (12) is provided for a fixing belt to pass through to fix the reactor.

10. A method for hoisting medium and large reactors, used with the hoisting device according to any one of claims 1 to 9, characterized in that: The following steps are involved: The wire rope (4) is loosened to an appropriate length, and the connecting arm (2) is unfolded; The pulling end (7) is arranged upper and lower and is respectively installed on the upper part and the lower part of the reactor; The driving member (6) reels the steel wire rope (4) and pulls the reactor through the steel wire rope (4); Determine the angle of the reactor, adjust the clamping state of the pulling end (7) with respect to the wire rope (4), and determine the lifting point; Lift the reactor and adjust the balance of the reactor after it reaches a certain height; Transport to the test location and lower the reactor.

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