CN115814298A

CN115814298A - Anti-falling device for maintaining hydraulic generator rotor

Info

Publication number: CN115814298A
Application number: CN202211583017.5A
Authority: CN
Inventors: 申雅洁
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-03-21

Abstract

The invention belongs to the field of hydraulic generator rotor maintenance instruments, and particularly relates to a falling prevention device for hydraulic generator rotor maintenance. The technology is including placing the platform, the top of placing the platform is provided with the slide bar, the diameter of placing the platform is less than the internal diameter of slide bar, the below of slide bar is provided with lifting unit, the cover is equipped with the slider on the slide bar, the bottom of slider is fixed with the coiler, the coiler includes the roll-up box of hollow columnar structure, the mounting groove has all been seted up to the preceding lateral wall and the back lateral wall of roll-up box, be provided with the dwang in the roll-up box, the winding has the safety belt on the dwang, the expansion end of safety belt is fixed with the safety buckle on the maintainer body, install the wind spring in the mounting groove of roll-up box rear side, be provided with locking mechanism in the mounting groove of roll-up box front side. When the maintenance personnel fall carelessly, the locking mechanism can limit the rotation of the rotating rod, and the safety belt is in a safe length by matching with the coil spring, so that the safety of the maintenance personnel is guaranteed, and meanwhile, the sliding rod can be always positioned above the maintenance personnel.

Description

Anti-falling device for maintaining hydraulic generator rotor

Technical Field

The invention belongs to the field of hydraulic generator rotor maintenance instruments, and particularly relates to a falling prevention device for hydraulic generator rotor maintenance.

Background

The maintenance of the hydroelectric generating set is the most critical link in the operation management of the hydropower station, and once the hydropower station fails due to careless maintenance, part of areas are easily damaged by power utilization. Generally, after the water turbine generator set runs for a long time, problems of abrasion, gap enlargement and the like are caused, so the water turbine generator set is generally overhauled in a dry season every year, and the generator set is comprehensively disassembled, inspected and repaired to maintain, recover or improve equipment performance. When the hydroelectric generating set is overhauled, particularly a rotor needs to firstly remove a rotating wheel of the hydroelectric generating set, then a rotor magnetic pole coil is replaced on the basis of keeping a magnetic pole iron core, meanwhile, the abrasion degree of a rotor bearing also needs to be accurately detected, and the rotor magnetic pole coil needs to be replaced in time once being seriously abraded, so that the heat resistance and the voltage resistance of the rotor are improved, and the heat dissipation capacity of an electric coil is increased.

The rotor is usually lifted out of a machine pit so as to carry out various inspections and repairs on the rotor, the large-scale hydraulic generator rotor is lifted out of the machine pit and placed on the ground or a buttress, the height from the ground to the upper end of the rotor is three to five meters, and at the height, a maintainer needs to stand carefully and stably and move and exert force to carry out various operations.

Therefore usually hang the safety belt in the mounting hole of rotor upper surface for safety, perhaps at rotor top and lateral wall fixed permanent magnetism ground jack, in order to supply the maintainer to use, but the dress of hanging of safety belt is in the state of "hanging high usefulness" like this, it is not up to standard, can not play effectual protection effect, because the maintainer removes at the rotor top from needs to fall, there is a certain distance from the fixed department, in case it is possible with ground contact to take place, the safety rope is when the rotor upper end that the structure is complicated moves simultaneously, it leads to blocking to hang very easily, thereby make the maintainer's removal receive the restriction, both influence safety and influence efficiency.

Disclosure of Invention

According to the defects in the prior art, the technical problems to be solved by the invention are as follows: the utility model provides a falling prevention device that hydraulic generator rotor maintenance was used can enough prevent that the maintainer from taking place to fall when the maintenance and can be accomodate unnecessary safety.

Anti-falling device of hydraulic generator rotor maintenance usefulness, including discoid place the platform, the top level of placing the platform is provided with the slide bar of ring structure, the diameter of placing the platform is less than the internal diameter of slide bar, the below of slide bar is provided with the lifting unit who is used for changing the slide bar height, the spout has been seted up at the top of slide bar, the cover is equipped with the slider that is sliding fit with it on the slide bar, the bottom of slider is fixed with the coiler, the coiler includes the roll-up box of hollow columnar structure, the mounting groove has all been seted up to the preceding lateral wall and the back lateral wall of roll-up box, be provided with the dwang of free rotation in the roll-up box, the one end of dwang is located the mounting groove of rear side, the other end of dwang is located the mounting groove of front side, the winding has the safety belt on the dwang, the passageway that is used for the safety belt business turn-over is seted up to the lateral wall of roll-up box, and fix on the safety buckle on the maintainer, install the mounting groove of roll-up box rear side and be used for restricting pivoted locking mechanism when the safety belt is spured fast in the mounting groove.

Furthermore, the slide blocks are multiple, and a retractor is fixed at the bottom of each slide block.

Further, the lifting unit includes the pivot that the level set up, and the dress is independently worn in placing the platform in the middle part of pivot, places the platform about both ends all vertically be provided with the lead screw, the lower extreme of every lead screw all overlaps and is the first helical gear of screw-thread fit with it, both ends all overlap and be equipped with the second helical gear with first helical gear intermeshing about the pivot, the left and right sides of pivot all is provided with the shell that is used for installing first helical gear and second helical gear, the upper end of every lead screw all is fixed with the supporting shoe, every supporting shoe all is fixed with the slide bar through the supporting shoe.

Further, locking mechanism is including fixing the ratchet in the box front side mounting groove of roll-up, the lateral wall is fixed with the carousel before the dwang, the carousel is located the ratchet, the preceding lateral wall of carousel articulates there is a plurality of to be used for the pawl of card on the ratchet when the dwang rotates fast, the one end that every pawl kept away from the pin joint is provided with the reset assembly who is used for pawl and ratchet separation, reset assembly is including fixing the dog at the lateral wall before the carousel, independently wear to be equipped with the gag lever post on the dog, the one end and the pawl of gag lever post are sliding fit, the other end of gag lever post is fixed with first stopper, the part cover that the gag lever post is located between first stopper and the dog is equipped with the spring, when the spring is in natural state, leave the clearance between pawl and the ratchet.

Furthermore, a roller wheel in sliding fit with the sliding groove is arranged in the sliding groove, the roller wheel is fixed at the inner top of the sliding block, and a sliding rail for sliding the roller wheel is arranged at the bottom of the sliding groove.

Furthermore, a channel for passing through the connecting rod is formed in the side wall, away from the circle center of the sliding rod, of the sliding block.

Furthermore, the bottom of the screw rod is fixed with a second limiting block.

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

the safety belt is detachably connected with the safety clothes on the body of the maintainer, when the maintainer falls down carelessly, the locking mechanism can limit the rotation of the rotating rod, so that the safety belt is clamped, the safety belt is in a safe length at any time by matching with the storage of a coil spring for the redundant safety belt, and the maintainer cannot contact with the ground, so that the safety of the maintainer is guaranteed, and meanwhile, the liftable slide bar can ensure that the slide bar is always positioned above the maintainer and can prevent the slide bar from influencing the lifting of the rotor.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 isbase:Sub>A cross-sectional view taken at A-A of FIG. 1;

FIG. 3 is an enlarged view at B in FIG. 2;

fig. 4 is a schematic structural view of the retractor;

FIG. 5 is a schematic structural view of embodiment 5 of the present invention;

names of components in the drawings: 1. the device comprises a supporting block 2, a first bevel gear 3, a second bevel gear 4, a shell 5, a sliding chute 6, a sliding rod 7, a sliding block 8, a placing table 9, a rotating shaft 10, a connecting rod 11, a fixed block 12, a screw rod 13, a second limit block 14, a stop block 15, a first limit block 16, a safety belt 17, a spring 18, a rotating disc 19, a pawl 20, a limit rod 21, a rotating rod 22, a ratchet wheel 23, a winding box 24, a coil spring 25, a roller 26 and a sliding rail.

Detailed Description

The present invention is further described in the following detailed description with reference to the drawings, but the invention is not limited thereto, and any modifications, equivalents, improvements and the like within the spirit and principle of the present invention should be included in the scope of the present invention.

Example 1

The anti-falling device for the maintenance of the hydraulic generator rotor comprises a disc-shaped placing table 8, a sliding rod 6 with a circular ring structure is horizontally arranged above the placing table 8, the diameter of the placing table 8 is smaller than the inner diameter of the sliding rod 6, a lifting assembly for changing the height of the sliding rod 6 is arranged below the sliding rod 6, the placing table 8 is fixed on the ground and used for placing the hydraulic generator rotor, the height of the sliding rod 6 can be adjusted through the lifting assembly, and the rotor can be placed on a crane and maintenance personnel can conveniently perform maintenance operation; as shown in fig. 1 and 2, the placing table 8 is disc-shaped, and the sliding rod 6 is circular ring-shaped;

the top of the sliding rod 6 is provided with a sliding groove 5, the sliding rod 6 is sleeved with a sliding block 7 in sliding fit with the sliding rod 6, the bottom of the sliding block 7 is fixed with a coiler, the sliding block 7 slides on the annular sliding rod 6, and the coiler is convenient for maintenance personnel to overhaul a plurality of positions of the rotor; as shown in fig. 1 and 2, the sliding groove 5 facilitates the sliding of the sliding block 7 and limits the sliding block 7 to prevent the sliding block 7 from rotating on the sliding rod 6 through the sliding groove 5; the sliding block 7 consists of an upper part and a lower part, and the opposite surfaces of the two parts are provided with semicircular grooves for the sliding rod 6 to pass through, as shown in figure 5;

the retractor comprises a retractor box 23 with a hollow columnar structure, mounting grooves are formed in the front side wall and the rear side wall of the retractor box 23, a freely rotating rod 21 is arranged in the retractor box 23, one end of the rotating rod 21 is located in the mounting groove in the rear side, the other end of the rotating rod 21 is located in the mounting groove in the front side, as shown in fig. 4, first through holes are formed in the front side wall and the rear side wall of the rotating rod 21, first bearings are mounted in the first through holes, the rotating rod 21 is in interference fit with the inner rings of the first bearings, and the mounting mode of the bearings is mature technology;

as shown in fig. 3 and 4, the safety belt 16 is wound on the rotating rod 21, a passage for the safety belt 16 to pass in and out is formed in the side wall of the winding box 23, the movable end of the safety belt 16 independently passes through the passage and is fixed on a safety buckle on the body of an inspector, and the safety belt 16 is wound on the rotating rod 21, so that the condition that the inspector needs to carry the safety belt with a certain length when overhauling every time can be avoided, the carrying of an overhauling tool is influenced, meanwhile, the inspector only needs to put on the safety clothes in advance when overhauling, and then the safety clothes and the movable end of the safety belt 16 are detachably connected in a buckling mode, so that time and labor are saved;

as shown in fig. 4, a coil spring 24 for automatically winding the safety belt 16 on the rotating rod 21 is installed in the installation groove at the rear side of the retraction box 23, when the safety belt 16 drives the rotating rod 21 to rotate, the coil spring 24 is tensioned, and when the safety belt 16 is in a loose state, due to the tension of the coil spring 24, the redundant safety belt 16 is automatically wound on the rotating rod 21, so that the redundant safety belt 16 is prevented from being wound on the uneven surface of the rotor, a certain potential safety hazard is brought to maintenance personnel (the maintenance personnel can generate a pulling phenomenon when moving without knowing), and the working efficiency of the maintenance personnel is also influenced; the installation mode of the coil spring 24 is the existing mature technology, one end of the safety belt 16 wound on the rotating rod 21 is fixed with the rotating rod 21, and one end of the safety belt 16 connected with the maintainer is fixed with a spring lock (not shown in the figure);

be provided with in the mounting groove of roll-up box 23 front side and be used for restricting dwang 21 pivoted locking mechanism when safety belt 16 is pulled fast, through locking mechanism, can be when the maintainer takes place the phenomenon of falling, die dwang 21 card, prevent that dwang 21 is rotatory, then safety belt 16's length is fixed, cooperation wind spring 24 makes safety belt 16 be in safe length constantly to accomodating of unnecessary safety belt 16, the maintainer can not contact with ground to guarantee maintainer's safety.

When the hydraulic generator rotor is maintained and used, the rotor is hung on the placing platform 8 through a crane, the safety belt 16 is detachably connected with a safety clothes on the body of a maintainer through the spring lock catch, then the sliding rod 6 is lifted until the sliding rod 6 can be always positioned above the maintainer, and then the maintainer can perform various maintenance operations on the top of the rotor or the hollow part of the axis; when the maintainer slips off carelessly, in the twinkling of an eye of landing, locking mechanism restriction dwang 21's rotation, safety belt 16 is died by the card to avoid the maintainer to take place the phenomenon of falling.

Example 2

In this embodiment, a technology is further described, the number of the sliding blocks 7 is multiple, a retractor is fixed at the bottom of each sliding block 7, since the diameter of the hydro-generator rotor is mostly tens of meters, multiple maintainers are usually required to perform maintenance at the same time, and the sliding rod 6 is provided with the multiple sliding blocks 7 to ensure the life safety of each maintainer, as shown in fig. 1; when the maintenance personnel need to move the transposition and the slide 7 can cause the safety belt 16 to be wound because of being on the same track, the maintenance personnel can exchange the safety belt 16 while ensuring the safety so as to avoid the safety belt 16 from being wound together.

This embodiment is when practical application, and slide bar 6 also can be a plurality of, all sets up a slider 7 on every slide bar 6, and the coiler is all fixed to the bottom of every slider 7 for every slider 7 all is in solitary track, thereby reduces the winding possibility of safety belt 16, avoids overhauing the disconnection of safety belt 16 with the maintainer during the period.

Example 3

In this embodiment, the technology is further described, the lifting assembly includes a rotating shaft 9 horizontally disposed, a middle portion of the rotating shaft 9 is independently installed in the placing table 8 in a penetrating manner, as shown in fig. 1 and fig. 2, a second through hole for the rotating shaft 9 to pass through is formed in the placing table 8;

as shown in fig. 1 and 2, the left and right ends of the placing table 8 are both vertically provided with screw rods 12, the lower end of each screw rod 12 is sleeved with a first helical gear 2 in threaded fit, the left and right ends of the rotating shaft 9 are sleeved with second helical gears 3 engaged with the first helical gears 2, through the first helical gears 2 and the second helical gears 3 engaged with each other, when the rotating shaft 9 rotates, the rotating shaft 9 drives the two second helical gears 3 to rotate at the same direction and at the same speed, so that the first helical gears 2 rotate at the same direction and at the same speed, because the first helical gears 2 are in threaded fit with the screw rods 12, the two screw rods 12 can move up and down at the same direction and at the same speed, so as to achieve the effect of synchronously adjusting the height of the slide rods 6, and the rotating shaft 9 is driven by an alternating current motor;

the left side and the right side of the rotating shaft 9 are both provided with a shell 4 for mounting the first helical gear 2 and the second helical gear 3, the shell 4 consists of an upper part and a lower part, the side wall of the shell 4 is provided with a third through hole for the rotating shaft 9 to pass through, a second bearing is mounted in the third through hole, the rotating shaft 9 is in interference fit with the inner ring of the second bearing, and as shown in fig. 1, the second helical gear 3 and the rotating shaft 9 are fixed by welding; third bearings are arranged above and below the first bevel gear 2, as shown in fig. 2, the third bearings are thrust ball bearings and used for bearing axial force, and each third bearing is composed of a seat ring, a shaft ring and a steel ball retainer assembly;

the upper end of each screw rod 12 is fixed with a supporting block 1, and each supporting block 1 is fixed with a slide bar 6 through the supporting block 1, as shown in fig. 1 and 2.

This embodiment can also adopt two lead screw lifters to go up and down slide bar 6 when actual application to utilize through same motor to turn to case, connecting rod and shaft coupling and reach synchronous operation's effect, this technique is current mature technology, and two lead screw lifters' lead screw is fixed with a supporting shoe 1 respectively.

Example 4

In this embodiment, the technology will be further described, the locking mechanism includes a ratchet wheel 22 fixed in a mounting groove at the front side of the winding box 23, a rotating disc 18 is fixed on the front side wall of the rotating rod 21, the rotating disc 18 is located in the ratchet wheel 22, and a plurality of pawls 19 for being clamped on the ratchet wheel 22 when the rotating rod 21 rotates rapidly are hinged on the front side wall of the rotating disc 18, as shown in fig. 3 and 4, when a falling phenomenon occurs to a maintenance worker, the safety belt 16 drives the rotating rod 21 to rotate rapidly clockwise, because one end of the pawl 19 is hinged on the rotating disc 18, the other end of the pawl 19 opens outwards under the action of centrifugal force and is clamped on the ratchet wheel of the ratchet wheel 22, so that the rotating disc 18 stops rotating, and the safety belt 16 cannot be pulled continuously; the pawl 19 is hinged with the rotary table 18 through a rivet or a shaft pin;

as shown in fig. 3, a reset component for separating the pawl 19 from the ratchet wheel 22 is disposed at one end of each pawl 19 away from the hinge point, the reset component includes a stopper 14 fixed on the front side wall of the rotary table 18, a limit rod 20 is independently mounted on the stopper 14 in a penetrating manner, one end of the limit rod 20 is in sliding fit with the pawl 19, the other end of the limit rod 20 is fixed with a first limit block 15, a spring 17 is sleeved on a portion of the limit rod 20 located between the first limit block 15 and the stopper 14, when the spring 17 is in a natural state, a gap is left between the pawl 19 and the ratchet wheel 22, when an inspector is safe, the safety belt 16 is in a relaxed state, the pawl 19 is separated from the ratchet wheel 22 under the elastic force of the spring 17, so that the safety belt 16 is normally used, the spring 17 is only used for pulling back the pawl 19, and when the rotary rod 21 rotates slowly, the pawl 19 is not in contact with the ratchet wheel 22, so that the safety belt 16 is not affected when pulled slowly, the safety belt is pulled quickly and is blocked, and the limit rod 20 and the pawl 19 are in sliding fit in a dovetail groove or a T-shaped groove manner.

Example 5

In this embodiment, a roller 25 in sliding fit with the sliding chute 5 is arranged in the sliding chute 5, the roller 25 is fixed at the inner top of the sliding block 7, a sliding rail 26 for the sliding of the roller 25 is arranged at the bottom of the sliding chute 5, and the sliding of the roller 25 in the sliding chute 5 can reduce friction during sliding, so that the sliding block 7 can automatically move along with the movement of the maintenance personnel, and the distance between the sliding block 7 and the maintenance personnel is reduced; as shown in fig. 5, the sliding rail 26 facilitates the rolling of the roller 25, and limits the roller 25, and a groove for mounting the roller 25 is formed at the top of the slider 7.

Example 6

In this embodiment, a channel for passing through the connecting rod 10 is formed in a side wall of the slider 7, which is away from a center of the sliding rod 6, as shown in fig. 5, through the channel, the slider 7 can slide on the sliding rod 6 at will, so as to prevent the connecting rod 10 from interfering with the sliding of the slider 7, and in practical application, the height formed in the channel should be smaller than the diameter of the sliding rod 6, so as to prevent the slider 7 from sliding out of the sliding rod 6.

Example 7

In this embodiment, as will be further explained in the art, the second limit blocks 13 are fixed at the bottom of the screw rod 12, as shown in fig. 2, the screw rod 12 is prevented from being screwed out of the first helical gear 2 by the second limit blocks 13, and the rising height of the screw rod 12 is limited.

Claims

1. The utility model provides a falling prevention device of hydraulic generator rotor maintenance usefulness, includes discoid platform (8) of placing, its characterized in that: a sliding rod (6) with a circular ring structure is horizontally arranged above the placing table (8), the diameter of the placing table (8) is smaller than the inner diameter of the sliding rod (6), a lifting component used for changing the height of the sliding rod (6) is arranged below the sliding rod (6), a sliding groove (5) is formed in the top of the sliding rod (6), a sliding block (7) in sliding fit with the sliding rod (6) is sleeved on the sliding rod (6), a retractor is fixed at the bottom of the sliding block (7), the retractor comprises a winding box (23) with a hollow columnar structure, mounting grooves are formed in the front side wall and the rear side wall of the winding box (23), a freely rotating rod (21) is arranged in the winding box (23), one end of the rotating rod (21) is located in the mounting groove in the rear side, the other end of the rotating rod (21) is located in the mounting groove in the front side, a safety belt (16) is wound on the rotating rod (21), a channel used for the safety belt (16) to enter and exit is formed in the side wall of the winding box (23), and the movable end of the safety belt (16) independently passes through the channel, and is fixed on a safety buckle on the body of an overhaul worker, a coil spring (24) for automatically coiling the safety belt (16) on the rotating rod (21) is arranged in a mounting groove at the rear side of the coiling box (23), and a locking mechanism for limiting the rotation of the rotating rod (21) when the safety belt (16) is pulled quickly is arranged in the mounting groove at the front side of the coiling box (23).

2. The fall preventing device for the maintenance of a rotor of a hydro-generator according to claim 1, wherein: the number of the sliding blocks (7) is multiple, and a retractor is fixed at the bottom of each sliding block (7).

3. The fall preventing device for the maintenance of the rotor of the hydro-generator according to claim 2, wherein: the lifting component comprises a rotating shaft (9) arranged horizontally, the middle of the rotating shaft (9) is independently arranged in a placing table (8) in a penetrating mode, screw rods (12) are vertically arranged at the left end and the right end of the placing table (8), first helical gears (2) in threaded fit with the lower ends of the screw rods (12) in a sleeved mode, second helical gears (3) meshed with the first helical gears (2) in a sleeved mode are arranged at the left end and the right end of the rotating shaft (9), shells (4) used for installing the first helical gears (2) and the second helical gears (3) are arranged at the left side and the right side of the rotating shaft (9), supporting blocks (1) are fixed to the upper ends of the screw rods (12), and each supporting block (1) is fixed to a sliding rod (6) through the supporting block (1).

4. The fall preventing device for the maintenance of a rotor of a hydro-generator according to claim 1, wherein: the locking mechanism comprises a ratchet wheel (22) fixed in a front side mounting groove of a furling box (23), a rotary plate (18) is fixed on the front side wall of a rotary rod (21), the rotary plate (18) is located in the ratchet wheel (22), a plurality of pawls (19) used for being clamped on the ratchet wheel (22) when the rotary rod (21) rotates rapidly are hinged to the front side wall of the rotary plate (18), one end, away from a hinged point, of each pawl (19) is provided with a reset assembly used for separating the pawls (19) from the ratchet wheel (22), the reset assembly comprises a stop block (14) fixed on the front side wall of the rotary plate (18), a limiting rod (20) is independently arranged on the stop block (14) in a penetrating mode, one end of the limiting rod (20) is in sliding fit with the pawl (19), a first limiting block (15) is fixed to the other end of the limiting rod (20), a spring (17) is sleeved on the portion, located between the first limiting block (15) and the stop block (14), and when the spring (17) is in a natural state, a gap is reserved between the pawl (19) and the ratchet wheel (22).

5. The fall preventing device for the maintenance of a rotor of a hydro-generator according to claim 3, wherein: and a roller (25) in sliding fit with the sliding groove (5) is arranged in the sliding groove (5), the roller (25) is fixed at the inner top of the sliding block (7), and a sliding rail (26) used for sliding the roller (25) is arranged at the bottom of the sliding groove (5).

6. The fall preventing device for the maintenance of a rotor of a hydro-generator according to claim 5, wherein: and a channel for passing through the connecting rod (10) is formed in the side wall of the sliding block (7) far away from the circle center of the sliding rod (6).

7. The fall preventing device for the maintenance of a rotor of a hydro-generator according to claim 3, wherein: and the bottom of the screw rod (12) is fixed with a second limiting block (13).