CN116513977A - Hydropower station maintenance vertical lifting device and application method thereof - Google Patents

Abstract

The invention provides a vertical lifting device for inspection and maintenance of a hydropower station, which includes a movable base frame, a column arranged on the base frame, a slewing mechanism installed on the column for vertical rotation, a boom mounted in the slewing mechanism for horizontal sliding, and a vertical Rotate the arm head set on the movable end of the boom, the arm head is T-shaped, the middle section of the arm head is connected to the boom, the two ends of the arm head are provided with pulleys for wire rope guidance, and the bottom frame and the slewing mechanism are respectively installed There is a hoisting mechanism and a hoisting device for retracting and unwinding the steel wire rope and the auxiliary hoisting wire rope for lifting the bending crane and the hook of the boom head, and a counterweight is arranged on the slewing mechanism to move. The invention has the effect of improving the efficiency and safety of the maintenance of the outer wall of the gate well.

Description

Hydropower station maintenance vertical lifting device and its use method

technical field

The invention relates to the technical field of vertical maintenance equipment for hydropower stations, in particular to a vertical lifting device for maintenance of hydropower stations and a use method thereof.

Background technique

During the long-term operation of the hydropower station, due to the erosion of the water flow, some concrete surface defects such as scouring pits, water leakage, and honeycomb pockmarks will occur in the gate well of the hydropower station, which will affect the safe and stable operation of hydraulic structures and the durability of concrete structures. Check and patch it regularly.

Since the gate shaft is located in the middle of the dam body, the top of the dam is evenly provided with support columns to support the dam crest. The support columns include vertical concrete columns and inclined diagonal braces, which makes it difficult for the slant-arm crane to carry out the vertical lowering of the hanging basket at this place. ; The usual way is to build scaffolding, arrange the hoist, and connect the hanging basket, but the maintenance efficiency of this way is too low.

Contents of the invention

Aiming at the deficiencies in the prior art, the present invention provides a vertical lifting device for maintenance of a hydropower station and its use method, which solves the problem of low maintenance efficiency in the prior art.

According to an embodiment of the present invention, the vertical lifting device for inspection and maintenance of a hydropower station includes a movable chassis, a column mounted on the chassis, a slewing mechanism mounted on the column for vertical rotation, a boom mounted in the slewing mechanism horizontally, and a vertical Directly rotate the arm head set on the movable end of the boom. The arm head is T-shaped. The middle section of the arm head is connected to the boom. The two ends of the arm head are provided with pulleys for wire rope guidance. A hoisting mechanism and a hoisting device are provided for retracting and unwinding steel wire ropes and auxiliary hoisting wire ropes for hoisting the bending crane and the hook of the boom head, and a counterweight is arranged on the slewing mechanism for movement.

Preferably, the slewing mechanism includes a connecting seat, a horizontal pipe and a support track, the connecting seat is close to one end of the horizontal pipe, the bottom of the connecting seat is rotatably fitted on the top of the column through a bearing, and the bottom of the connecting seat is coaxially fixed with teeth The side wall of the column is fixedly equipped with a motor, the output shaft of the motor is provided with a gear meshed with the ring gear, and the counterweight is horizontally slidably arranged on the support rail, and the support rail is close to the other end of the horizontal tube.

Preferably, the boom is axially slidably arranged in the horizontal tube, the inner bottom and both inner side walls of the horizontal tube are provided with rollers for supporting the boom, and the horizontal tube is provided with rollers for driving the A telescopic mechanism for the axial movement of the boom. The telescopic mechanism includes a deceleration motor. A gear and rack assembly is provided for transmission between the deceleration motor and the boom. Limiting arc limit block.

Preferably, the counterweight is in the shape of a door, and pulleys are provided on the inner top and both sides of the inner wall of the counterweight, and the pulleys are located in the support track.

Preferably, the bottom of the arm head is vertically rotatably arranged on the movable end of the boom, and the bottom end of the arm head is connected to the motor on the boom through a gear set transmission.

Preferably, the jib head, the boom, the slewing mechanism and the upright column are all hollow structures with fixed pulleys inside, and the wire ropes and auxiliary crane wire ropes run from the inside of the maintenance device.

Preferably, the slewing mechanism is provided with a retractor for rewinding the steel wire rope and the auxiliary hanging steel wire rope.

Preferably, a guide pulley is provided for horizontal rotation on the side wall of the bending gondola close to the arm head.

Preferably, one side of the underframe is connected to a rail locking device through a pull cord, and the rail locking device is fixedly installed on the ground track.

The method of using the vertical lifting and maintenance device of a hydropower station includes the following steps: S1. Preparation, transport the lifting device to the working position through the rollers at the bottom of the chassis or a vehicle, and adjust the angle of the boom through the slewing mechanism so that the boom is perpendicular to the On the outer wall, maintenance personnel enter into the bending crane; S2, lowering, control the boom to slide out from the slewing mechanism, the boom drives the bending crane to move into the gate well, control the sliding length of the boom, so that the side of the boom Keep a gap between the wall and the side wall of the gate well, control the hoisting mechanism to unwind the wire rope, and bend the gondola to fall vertically; The two sides are inspected and repaired respectively. The angle of the boom is adjusted through the slewing mechanism and the boom is moved to one side. Overhaul the outer wall to be parallel, and finally continue the overhaul until the overhaul is completed and the bending gondola is recovered.

Compared with the prior art, the present invention has the following beneficial effects:

1. The horizontally sliding boom drives the bending crane to move, and the vertical lifting device for maintenance will not be interfered by concrete columns and other structures during the construction process, which can ensure the smooth progress of maintenance operations.

2. The slewing mechanism cooperates with the vertically rotating arm head to inspect and repair the opposite side of the bottom frame and the side walls of the gate shaft on both sides without moving the vertical lifting device for maintenance, thereby improving the Improve the efficiency of maintenance work.

3. The movable counterweight can move on the movable end of the slewing mechanism according to the extended length of the boom and the weight of the bending gondola, so as to ensure the balance of force on both ends of the slewing mechanism, thereby improving the stability and stability of the device construction. safety.

Description of drawings

Fig. 1 is a front view of an embodiment of the present invention.

Fig. 2 is a top view of an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a rotary mechanism in an embodiment of the present invention.

Fig. 4 is a front view of the rotary mechanism in the embodiment of the present invention.

Fig. 5 is a schematic structural diagram of the boom in the embodiment of the present invention.

Fig. 6 is a front view of the boom in the embodiment of the present invention.

Fig. 7 is a schematic diagram of the structure of the arm head in the embodiment of the present invention.

Fig. 8 is a schematic structural diagram of the telescoping mechanism in the embodiment of the present invention.

Fig. 9 is a schematic structural diagram of a counterweight in an embodiment of the present invention.

Among the above-mentioned drawings: 1, bending crane; 2, steel wire rope; 3, life rope; 4, arm head; 5, auxiliary crane wire rope; 6, boom head hook; 7, boom; 8, retractor; 9. Telescopic mechanism; 10. Slewing mechanism; 11. Column; 12. Lifting device; 13. Counterweight; 14. Lifting mechanism; 15. Electrical system; 16. Underframe; 17. Rail locking device; 18. Basket stairs.

Detailed ways

The technical solutions in the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in Figure 1-9, in order to improve the maintenance efficiency of the gate well. The present invention proposes a vertical lifting device for inspection and maintenance of a hydropower station, which includes a movable base frame 16, a column 11 arranged on the base frame 16, a turning mechanism 10 arranged on the column 11 for vertical rotation, and a horizontal sliding mechanism arranged in the turning mechanism 10. Boom 7 and the arm head 4 that vertically rotates and is arranged on the movable end of the boom 7, the arm head 4 is T-shaped, the middle section of the arm head 4 is connected on the boom 7, and the two ends of the arm head 4 are provided with wire ropes. 2 Guided pulleys, the underframe 16 and the slewing mechanism 10 are respectively provided with a hoisting mechanism 14 and a hoisting device 12 for retracting and unwinding the wire rope 2 and the auxiliary hoisting wire rope 5 for bending the crane 1 and the jib head hook 6 to lift the hoist, and the slewing A counterweight 13 is movable on the mechanism 10 .

The underframe 16 can be fixedly installed or equipped with universal wheels, and can be hauled by the vehicle; the underframe 16 is connected with other equipment installed on the underframe 16 to the designated location and fixed; The steps 18 enter into the bending gondola 1 . When the height of the bending crane 1 is lower than the guardrail when it is hoisted, the movable end of the arm head 4 is pushed upward by the oil cylinder on the arm head 4 to lift the bending crane 1 so that the bending crane 1 is higher than the guardrail. Guardrail, then control the boom 7 to stretch out, the bending crane 1 is moved into the gate shaft, and then the bending crane 1 is lowered. An electrical system 15 for complete machine control is integrated inside the hoisting mechanism 14 .

As shown in FIGS. 1-4 , in order to realize the rotation of the turning mechanism 10 in the vertical direction. The slewing mechanism 10 includes a connecting seat, a horizontal pipe and a support rail. The connecting seat is close to one end of the horizontal pipe. The bottom of the connecting seat is rotatably fitted on the top of the column 11 through a bearing. The bottom of the connecting seat is coaxially fixed with a gear ring , the side wall of the column 11 is fixedly provided with a motor, the output shaft of the motor is provided with a gear meshed with the gear ring, and the counterweight 13 is horizontally slidably arranged on a support track, and the support track is close to the other end of the horizontal pipe. The motor drives the gear to rotate, the gear drives the gear ring meshed with it to rotate, and the gear ring drives the connecting seat to rotate, so as to realize the vertical rotation of the slewing mechanism 10 and then adjust the position of the bending crane 1 . Connect the U-shaped steel structure on the opposite side wall of the horizontal pipe, install the lug plate on the outer wall of the U-shaped steel structure, set the connecting lug plate on the top of the mounting seat, and carry out bolt connection through the connecting lug plate and the installation lug plate, and connect the horizontal pipe and Detachable set between seats.

As shown in Figures 1-6, in order to realize the axial sliding of the boom 7. The boom 7 is axially slidably arranged in the horizontal tube, the inner bottom and both inner side walls of the horizontal tube are provided with rollers for supporting the boom 7, and the horizontal tube is provided with rollers for driving the crane. The telescopic mechanism 9 for the axial movement of the arm 7, the telescopic mechanism includes a geared motor, a gear and a rack assembly are provided for transmission between the geared motor and the boom 7, and the inner top of the horizontal tube is provided with rollers for cooperating with the The arc-shaped limit block of boom 7 limits.

The deceleration motor in the telescopic mechanism drives the gear to rotate, and the gear pushes the rack meshed with it to move, thereby realizing the axial sliding of the boom 7; by rotating the rollers in the horizontal tube, the friction between the boom 7 and the horizontal tube is reduced, so that The movement of the boom 7 is smoother. At the same time, the arc-shaped limit block can press down one end of the boom 7 located inside the horizontal tube to ensure the stable axial sliding of the boom 7 .

As shown in FIG. 1 , FIG. 2 and FIG. 9 , in order to realize the stable movement of the counterweight 13 . The counterweight 13 is in the shape of a door, and the inner top and both sides of the inner wall of the counterweight 13 are provided with pulleys, and the pulleys are located in the support track. The door-shaped counterweight 13 can realize the clamping of the horizontal pipe, while leaving the bottom wall of the horizontal pipe for the threading of the wire rope 2 and the auxiliary hoisting wire rope 5; a motor is arranged inside the counterweight 13, and the output shaft of the motor Connect the pulley, control the steering of the motor through the control system, and set the moving target position of the counterweight 13 according to the extended length of the boom 7 and the load on the bent crane 1, so as to ensure that the two ends of the horizontal pipe are stressed balance.

As shown in Figure 1, Figure 2 and Figure 7. The bottom of the boom head 4 is vertically rotatably arranged on the movable end of the boom 7, and the bottom end of the boom head 4 is connected to the motor on the boom 7 through a gear train transmission. Due to the internal rope running of the arm head 4, the arm head 4 is a hollow structure, so the gear ring is coaxially fixed at the bottom end of the arm head 4, and the gear is installed on the motor output shaft at the top of the boom 7, and the gear and the gear ring are meshed. Realize that the motor drives the arm head 4 to rotate vertically.

As shown in Figure 1, in order to avoid the steel wire rope being exposed to damage or interference. The arm head 4, the boom 7, the slewing mechanism 10 and the column 11 are all hollow structures with fixed pulleys inside, and the steel wire rope 2 and the auxiliary hanging steel wire rope 5 all run from the inside of the maintenance device.

As shown in Figure 1. The slewing mechanism 10 is provided with a retractor 8 for rewinding the steel wire rope 2 and the auxiliary hanging steel wire rope 5 . The retractor 8 is arranged on the outside of the horizontal pipe of the slewing mechanism 10, and is used to accommodate redundant steel wire ropes or place spare steel wire ropes.

As shown in FIG. 1 , in order to avoid the bending crane 1 being affected by the wind force during the lowering process, it may hit the side wall of the gate well. A guide pulley is provided for horizontal rotation on the side wall of the bending crane 1 close to the arm head 4 .

As shown in FIG. 1 , in order to improve the stability of the installation of the underframe 16 . One side of the underframe 16 is connected with a rail lock 17 through a stay cord, and the rail lock 17 is fixedly installed on the ground track. The rail locking device 17 is locked on the track on the ground by bolts, and is connected with the underframe 16 by a stay cord, and acts as an integral ground anchor of the lifting device to prevent the device from tilting.

A method for using a vertical lifting and maintenance device for a hydropower station, comprising the following steps: S1, preparation, transport the lifting device to a working position through the rollers at the bottom of the chassis 16 or a vehicle, and adjust the angle of the boom 7 through the slewing mechanism 10, so that the crane The arm 7 is perpendicular to the outer wall to be overhauled, and the maintenance personnel enter the bending crane 1; S2, lowering, control the boom 7 to slide out from the slewing mechanism 10, the boom 7 drives the bending crane 1 to move into the gate shaft, and control The length that the boom 7 slides out keeps a gap between the side wall of the boom 7 and the side wall of the gate shaft, and the hoisting mechanism 14 is controlled to unwind the wire rope 2, and the bending crane 1 falls vertically; S3, shifting, According to the progress of the inspection, after completing a lowering, the two sides of the inspected area are inspected respectively, and the angle of the boom 7 is adjusted through the slewing mechanism 10 to move the boom 7 to one side, while continuing to extend the boom 7 , then control the arm head 4 to rotate in the opposite direction with the slewing mechanism 10, so that the inner wall of the bent crane 1 is parallel to the outer wall to be overhauled, and finally continue to overhaul until the overhaul is completed and the bent crane 1 is recovered.

Claims (10)

1. The vertical lifting device for inspection and maintenance of hydropower stations is characterized in that it includes a movable base frame (16), a column (11) mounted on the base frame (16), and a slewing mechanism (10) mounted on the column (11) for vertical rotation ), horizontally slide the boom (7) arranged in the slewing mechanism (10), and vertically rotate the arm head (4) arranged on the movable end of the boom (7), the arm head (4) is T-shaped, and the arm head The middle section of (4) is connected to the boom (7), the two ends of the arm head (4) are provided with pulleys for guiding the wire rope (2), and the underframe (16) and the slewing mechanism (10) are respectively provided with retractable Put the steel wire rope (2) and the auxiliary crane wire rope (5) to lift the hoisting mechanism (14) and lifting device (12) of the bending crane (1) and the boom head hook (6), and the slewing mechanism (10) The mobile device has a counterweight (13). 2. The vertical lifting and maintenance device of a hydropower station according to claim 1, characterized in that: the slewing mechanism (10) includes a connecting seat, a horizontal pipe and a support track, the connecting seat is close to one end of the horizontal pipe, and the bottom of the connecting seat rotates through a bearing Fitted on the top of the column (11), the bottom of the connecting seat is coaxially fixed with a gear ring, the side wall of the column (11) is fixed with a motor, and the output shaft of the motor is provided with a gear meshing with the gear ring. The counterweight (13) is horizontally slidably arranged on the support track, and the support track is close to the other end of the horizontal tube. 3. The vertical lifting and maintenance device of a hydropower station according to claim 2, characterized in that: the boom (7) is axially slidably arranged in the horizontal pipe, and the inner bottom and both inner walls of the horizontal pipe are provided with The rollers supporting the boom (7), the horizontal tube is provided with a telescopic mechanism (9) for driving the boom (7) to move axially, the telescopic mechanism includes a geared motor, a geared motor and the boom ( 7) A gear and a rack assembly are installed in the transmission between them, and the inner top of the horizontal tube is provided with an arc-shaped limit block for cooperating with the rollers to limit the position of the boom (7). 4. The vertical lifting maintenance device for hydropower stations according to claim 2, characterized in that: the counterweight (13) is in the shape of a door, and the inner top and both sides of the inner wall of the counterweight (13) are provided with pulleys, Pulleys are located within the support track. 5. The vertical lifting maintenance device for hydropower stations according to claim 1, characterized in that: the bottom of the arm head (4) is vertically rotated and arranged on the movable end of the boom (7), and the arm head (4) ) and the motor on the boom (7) are connected through a gear set transmission. 6. The vertical lifting and maintenance device of a hydropower station according to claim 1, characterized in that: the arm head (4), the boom (7), the slewing mechanism (10) and the column (11) are all hollow structures and are equipped inside There is a fixed pulley, and the steel wire rope (2) and the auxiliary hanging steel wire rope (5) all run from the inside of the maintenance device. 7. The vertical lifting and maintenance device of a hydropower station according to claim 1, characterized in that: the slewing mechanism (10) is provided with a retractor (8) for rewinding the steel wire rope (2) and the auxiliary crane wire rope (5) ). 8. The vertical lifting maintenance device for hydropower station according to claim 1, characterized in that: the side wall of the bending crane (1) close to the arm head (4) is provided with guide pulleys for horizontal rotation. 9. The vertical lifting maintenance device for hydropower stations according to claim 1, characterized in that: one side of the underframe (16) is connected to the rail locking device (17) through a pull rope, and the rail locking device (17) is fixedly installed on the ground rail superior. 10. The method for using the vertical lifting and maintenance device of a hydropower station according to any one of claims 1-9, characterized in that it comprises the following steps: S1, preparation, using the rollers at the bottom of the chassis (16) or carrying the vehicle to lift the lifting device Transport to the working position, adjust the angle of the boom (7) through the slewing mechanism (10), so that the boom (7) is perpendicular to the outer wall to be repaired, and the maintenance personnel enter the bending crane (1); S2, lowering, control The boom (7) slides out from the slewing mechanism (10), and the boom (7) drives the bending crane (1) to move into the gate shaft, and the length of the boom (7) is controlled so that the boom (7) Keep a gap between the side wall of the gate shaft and the side wall of the gate well, control the hoisting mechanism (14) to unwind the wire rope (2), and bend the crane (1) to fall vertically; S3, shift, according to the progress of maintenance, in After completing a lowering, carry out inspection on both sides of the inspected area respectively, adjust the angle of the boom (7) through the slewing mechanism (10) and make the boom (7) move to one side, and continue to extend the boom ( 7), and then control the arm head (4) to rotate oppositely with the slewing mechanism (10), so that the inner wall of the bent crane (1) is parallel to the outer wall to be repaired, and finally continue the repair until the repair is completed and the bent crane is recovered (1).