CN216583966U

CN216583966U - Flywheel cover lifting device

Info

Publication number: CN216583966U
Application number: CN202122766485.3U
Authority: CN
Inventors: 曹建光; 刘阳; 张菁; 周峰; 袁伟刚; 司江利; 张立东; 李明辉; 孙帅; 刘树周; 赵博; 赖文超; 张洪铭
Original assignee: China General Nuclear Power Corp; CGN Power Co Ltd; China Nuclear Power Operation Co Ltd
Current assignee: China General Nuclear Power Corp; CGN Power Co Ltd; China Nuclear Power Operation Co Ltd
Priority date: 2021-11-11
Filing date: 2021-11-11
Publication date: 2022-05-24
Anticipated expiration: 2031-11-11

Abstract

The utility model discloses a flywheel cover lifting device, which comprises a lifting host, a lifting assembly and a plurality of pull-connecting assemblies, wherein the lifting host is vertically connected to a flywheel of a motor and is fixed relative to the flywheel; the plurality of pulling and connecting assemblies are arranged at intervals along the periphery of the lifting main machine, move upwards along with the lifting assembly and lift the flywheel cover. According to the flywheel cover lifting device, the lifting main machine and the lifting assembly are matched with the pull-connection assembly, the lifting assembly drives the pull-connection assembly to lift, so that the flywheel cover is lifted, the operation is simple and convenient, the lifting time of the flywheel cover is shortened, the investment of manpower and equipment is reduced, the cost is reduced, and the safety is high.

Description

Flywheel cover lifting device

Technical Field

The utility model relates to a lifting device, in particular to a flywheel cover lifting device.

Background

At present, a scaffold is built on a motor layer and a manual hoist is used for lifting the flywheel cover when some main pumps (such as 100D type) in a nuclear power plant are disassembled.

The method relates to scaffold transportation and building, scaffold bearing calculation, scaffold lifting point and motor center point adjustment, scaffold lifting point finding, manual hoist transportation, suspension and adjustment, manual hoist operation authorization training, hoisting safety point release and the like, and a plurality of workers are required to cooperate to operate. The following three conditions exist for disassembling the flywheel cover: in the conventional situation, during overhaul, the lifting work of the flywheel cover of the main pump motor is required to be executed so as to carry out the work of motor flywheel cover sealing gasket inspection, flywheel radial/axial clearance inspection, flywheel pawl flaw detection and the like; ten years of overhaul motor replacement and no-load conditions, namely, after the motor is inching in no-load, a flywheel cover needs to be detached and a pawl needs to be restored; emergency, namely the situation that the oil level of the motor is alarmed and the temperature of the bearing bush is overhigh during daily life, and the flywheel cover is detached to be checked on the spot when the pump is stopped emergently.

To sum up, the dismantlement of current flywheel cover is lifted by crane and is had following not enough: the complexity of work content, involving too many professionals and personnel, occupying major repair critical paths, having too long construction period, being incapable of fast reaction processing in emergency, and having great consumption of capital cost, time cost and manpower cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a flywheel cover lifting device which is simple to operate.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the flywheel cover lifting device comprises a lifting main machine, a lifting assembly and a plurality of pull-connection assemblies, wherein the lifting main machine is vertically connected to a flywheel of a motor and is fixed relative to the flywheel;

the plurality of pulling and connecting assemblies are arranged at intervals along the periphery of the lifting main machine, move upwards along with the lifting assembly and lift the flywheel cover.

Preferably, the lifting main machine comprises a base, a supporting cylinder and a lead screw, wherein the base is used for being matched with the flywheel and locked on the flywheel, the supporting cylinder is vertically connected to the base, the lead screw is arranged in the supporting cylinder, and the lead screw is vertically connected to the base and can rotate relative to the base and the supporting cylinder;

the lifting assembly is matched with the periphery of the supporting cylinder and is in threaded fit with the lead screw, and the lead screw is driven by the rotation of the lead screw to move up and down along the lead screw.

Preferably, the lifting assembly comprises a connecting ring which is positioned in the supporting cylinder and is sleeved on the periphery of the screw rod through thread fit, a lifting ring which is sleeved on the periphery of the supporting cylinder, and at least one connecting part;

the wall of the supporting cylinder is provided with at least one strip-shaped hole, and the strip-shaped hole extends along the axial direction of the supporting cylinder; the connecting part is matched in the strip-shaped hole and connected with the connecting ring and the lifting ring.

Preferably, the periphery of the lifting ring is provided with a plurality of connecting rings arranged at intervals, and each connecting ring is connected with one of the pull-connecting assemblies.

Preferably, the pull-on assembly comprises a double-hook pull ring, one hook part of the double-hook pull ring is hooked with the connecting ring, and the other hook part of the double-hook pull ring is hooked with the flywheel cover.

Preferably, the pull-in assembly further comprises a side pull lifting ring for locking on the flywheel cover; the other hook part of the double-hook pull ring is connected with the side pull hanging ring in a hanging mode.

Preferably, the lifting main machine further comprises a driving motor arranged in the base; the driving motor is connected with the lead screw and drives the lead screw to rotate.

Preferably, the lifting main machine further comprises a hand wheel; the hand wheel is arranged at the top of the supporting cylinder and is relatively fixedly connected with the lead screw, and the hand wheel rotates to drive the lead screw to rotate.

Preferably, the flywheel housing lifting device further comprises a plurality of diagonal support rods for supporting between the lifting main body and the flywheel;

the inclined supporting rods are arranged along the periphery of the lifting main machine at intervals and are arranged in a staggered mode with the pulling and connecting assembly.

Preferably, one end of the inclined strut is rotatably connected to the lifting main machine, and the other end of the inclined strut is detachably connected to the flywheel.

Preferably, a plurality of connecting lugs are arranged at the top of the lifting main machine corresponding to the inclined supporting rods; one end of each inclined supporting rod is connected with the connecting lug through a rotating shaft.

Preferably, the other end of the diagonal brace is provided with a magnetic suction seat, and the other end of the diagonal brace is adsorbed on the flywheel through the magnetic suction seat.

Preferably, the flywheel cover lifting device further comprises a plurality of insulating support rods which are used for supporting between the flywheel cover and the flywheel cover base after the flywheel cover is lifted to a preset height.

Preferably, the flywheel housing lifting device further comprises a storage box for storing the lifting main machine, the pull-connection assembly and the inclined support rod.

Preferably, the flywheel housing lifting device further comprises a power box.

According to the flywheel cover lifting device, the lifting main machine and the lifting assembly are matched with the pull-connection assembly, the lifting assembly drives the pull-connection assembly to lift, so that the flywheel cover is lifted (namely lifted), the operation is simple and convenient, the lifting time of the flywheel cover is shortened, the investment of manpower and equipment is reduced, the cost is reduced, and the safety is high.

Drawings

The utility model will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic structural view of a flywheel cover lifting device mounted on a flywheel cover according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the lifting machine of FIG. 1;

FIG. 3 is a schematic structural diagram of a flywheel cover lifting device for lifting a flywheel cover according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of the flywheel cover lifting device of the embodiment of the present invention after lifting the flywheel cover to a predetermined height;

fig. 5 is a schematic structural view of a flywheel housing lifting device in a storage box according to an embodiment of the utility model.

Detailed Description

For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

As shown in fig. 1, the flywheel cover lifting device of the present invention is used for lifting a flywheel cover 2 covered on a flywheel 1 of a motor, so that the flywheel cover 2 is separated from a flywheel cover base 3 and is positioned at a predetermined height. The flywheel cover lifting device can comprise a lifting main machine 10, a lifting assembly 20 which is arranged on the lifting main machine 10 and can move up and down along the lifting main machine 10, and a plurality of pulling assemblies 30 which are connected with the lifting assembly 20.

The lifting main machine 10 is used for being vertically connected to the flywheel 1 of the motor and is fixed relative to the flywheel 1. A plurality of pulling-connecting assemblies 30 are arranged at intervals along the periphery of the lifting main machine 10 and are used for connecting between the lifting assembly 20 and the flywheel housing 2. When the lifting component 20 moves up and down along the lifting main machine 10, the pull-connecting component 30 moves up and down along with the lifting main machine; when the lifting assembly 20 moves upwards, the pulling assembly 30 moves upwards accordingly and lifts the flywheel housing 2, as shown in fig. 3 and 4.

Specifically, in one embodiment, as shown in fig. 1 and 2, the lifting main body 10 includes a base 11 for cooperating with the flywheel 1 and locking the flywheel 1, a support cylinder 12 vertically connected to the base 11, a lead screw 13 disposed in the support cylinder 12, and a driving motor 14 connected to and driving the lead screw 13 to rotate. According to the requirement, the flywheel housing lifting device of the present embodiment may further include a power box (not shown), which is connected to the driving motor 14 and supplies power to the driving motor 14.

Wherein, the base 11 can be detachably locked on the center position of the flywheel 1 through locking pieces such as screws or bolts. The drive motor 14 is disposed in the base 11, and is connected with the lead screw 13 at its output shaft. The screw 13 is also vertically disposed in the support cylinder 12 with respect to the base 11 and the flywheel 1. One end part (lower end part) of the screw rod 1 is connected with an output shaft of a driving motor 14 and rotates relative to the base 11 and the support cylinder 12 along with the output shaft; the opposite end (upper end) of the screw 13 is disposed in and rotatable relative to the end cap of the support cylinder 12.

In other embodiments, the lifting host 10 may also include a hand wheel (not shown). The hand wheel is arranged on the top of the support cylinder 12 and is relatively fixedly connected with the screw 13, and the hand wheel rotates to drive the screw 13 to rotate. When the driving motor 14 fails, the operator can directly rotate the hand wheel to drive the screw 13 to rotate. Or, the hand wheel can also replace the arrangement of the driving motor 14, namely the driving motor 14 is not needed to be arranged, the hand wheel is connected with the lead screw 13, the hand wheel is rotated by manpower to replace an electric driving mode, and the influence of the conditions such as power failure is avoided.

As shown in fig. 1 and 2, the lifting assembly 20 is engaged with the outer periphery of the support cylinder 12 and is in threaded engagement with the lead screw 13, and is driven by the lead screw 13 to move up and down along the lead screw 13. The lifting assembly 20 may specifically include a connecting ring 21 and a lifting ring 22 disposed radially inward and outward, and at least one connecting portion 23 connected between the connecting ring 21 and the lifting ring 22.

The connecting ring 21 is arranged in the support cylinder 12 and is sleeved on the periphery of the screw 13 through thread fit, and the lifting ring 22 is sleeved on the periphery of the support cylinder 12 and can move up and down along the support cylinder 12. The connecting portion 23 connects the connecting ring 21 and the lifting ring 22 together and is relatively fixed, and when the lead screw 13 rotates, the rotation is converted into a linear motion through a threaded fit, so that the whole lifting assembly 20 is driven to move up and down along the support cylinder 12.

Corresponding to the setting of lifting unit 20, the section of thick bamboo wall of a supporting section of thick bamboo 12 is equipped with at least one bar hole, and the axial extension of a supporting section of thick bamboo 12 is followed in the bar hole, also is parallel with lifting unit 20's moving direction. The connecting portion 23 is matched in the bar-shaped hole and connected with the connecting ring 21 and the lifting ring 22, the bar-shaped hole plays a role in rotation limitation and guiding for the connecting portion 23, so that the lifting assembly 20 is driven to move up and down by the rotation of the lead screw 13, and the lifting assembly 20 cannot rotate along with the lead screw 13.

The pulling member 30 is connected at one end thereof to the lifting ring 22 of the lifting member 20. Corresponding to the pulling assembly 30, a plurality of connecting rings 24 arranged at intervals are arranged on the periphery of the lifting ring 22; the number of attachment rings 24 corresponds to the number of pull-on assemblies 30, with each attachment ring 24 connecting a pull-on assembly 30. Preferably, the flywheel housing lifting device comprises four groups of pull-connection assemblies 30 which are uniformly arranged at intervals along the circumferential direction of the lifting main machine 10, so that the flywheel housing 2 is lifted in a balanced and stable manner.

In addition, in the present embodiment, as shown in fig. 1 and 2, the pulling-connecting assembly 30 includes a double-hook pulling ring 31, one hook portion of the double-hook pulling ring 31 is hooked with the connecting ring 24, and the other hook portion is hooked with the flywheel housing 2; such a double hook tab 31 facilitates its removal from the attachment ring 24 for storage. The double hook tab 31 may further preferably be a double hook adjustable style basket tab.

The pulling assembly 30 can also comprise a side pulling eye 32 for locking on the flywheel housing 2; a hook portion of the double hook tab 31 remote from the attachment ring 24 is hooked to the side pull tab ring 32. When the flywheel cover 2 is connected, the side pull hanging ring 32 can be fixed on the flywheel cover 2 and then connected with the double-hook pull ring 31.

Furthermore, the flywheel cover lifting device of the utility model also comprises a plurality of inclined supporting rods 40 which are used for supporting between the lifting main machine 10 and the flywheel 2, thereby further improving the stability of the lifting main machine 10 on the flywheel 1. The inclined supporting rods 40 are arranged at intervals along the periphery of the lifting main machine 10, and the inclined supporting rods 40 and the pulling-connecting assembly 30 are arranged in a staggered mode, so that mutual interference between the inclined supporting rods 40 and the pulling-connecting assembly is avoided.

One end of the inclined strut 40 is rotatably connected to the lifting main machine 10, and the other end is detachably connected to the flywheel 2. The inclined strut 40 can rotate relative to the lifting main machine 10, so that an included angle between the inclined strut and the lifting main machine 10 can be conveniently adjusted, actual requirements are met, and meanwhile, the inclined strut 40 can be folded to the side face of the lifting main machine 10 to be convenient to store.

Corresponding to the connection of the inclined strut 40, the top of the lifting main body 10 may be provided with a plurality of connecting lugs 15 corresponding to the inclined strut 40. The number of the connecting lugs 15 corresponds to the number of the inclined stay bars 40, and one end of each inclined stay bar 40 is connected with the connecting lugs 15 through a rotating shaft. The engaging lug 15 is mainly disposed on the outer periphery of the supporting cylinder 12, and may be directly fixed on the outer periphery of the supporting cylinder 12 by welding or fastening, or may be formed on a hoop member, and then fixed on the outer periphery of the supporting cylinder 12 by the hoop member.

The engaging lug 15 is preferably located at the top of the support cylinder 12 so as to be outside the travel of the lifting assembly 20, avoiding interference therewith.

The other end of the diagonal brace 40 (far away from the lifting main machine 10) is detachably connected to the flywheel 2, so that the diagonal brace can be conveniently detached after the lifting work of the flywheel cover 2 is completed. Alternatively, the other end of the diagonal lever 40 is provided with a magnetic attraction seat 41, and the other end is attracted on the flywheel 2 through the magnetic attraction seat 41, so that the diagonal lever 40 and the flywheel 2 are connected in a quick and aligned mode. The magnetic suction seat 41 is detachably connected to the end of the diagonal brace 40, so as to be convenient to detach and store.

The number of the diagonal braces 40 is preferably four, and the diagonal braces are uniformly spaced along the circumferential direction of the lifting main body 10.

According to requirements, referring to fig. 4, the flywheel cover lifting device of the present invention further comprises a plurality of insulating support rods 50 for supporting between the flywheel cover 2 and the flywheel cover base 3 after the flywheel cover 2 is lifted to a predetermined height. The insulating support rod 50 plays an insulating role on one hand, does not influence the insulation measurement of a bearing on the motor, and plays a supporting role on the other hand.

In order to facilitate storage, transportation, etc., as shown in fig. 5, the flywheel housing lifting device of the present invention further includes a storage box 60 for storing the lifting main frame 10, the pull-connecting assembly 30, the inclined supporting rod 40, and the insulating supporting rod 50, which can be arranged in the storage box 60 or partially stacked up and down. The magnetic holder 41 at the end of the diagonal member 40 is removable and is housed in the housing box 60 independently of the diagonal member 40.

Various slot positions can be separated in the storage box 60 according to the size of each piece, and the lifting main frame 10, the pulling connection component 30, the inclined supporting rod 40 and the insulating supporting rod 50 are respectively accommodated in the corresponding slot positions, so that the positioning in the storage box 60 is realized.

The flywheel cover lifting device can be applied to the aspects of flywheel cover disassembly after overhaul of a nuclear power plant, flywheel cover disassembly during motor replacement and no-load, flywheel cover disassembly in daily emergency and the like.

With reference to fig. 1, 3 and 4, when the lifting device for a flywheel cover of the present invention is used, it is installed on the flywheel 1 and the flywheel cover 2 as shown in fig. 1, and is located at the center of the flywheel 1 and inside the flywheel cover 2. The lead screw 13 of the lifting main machine 10 is driven to rotate to drive the lifting component 20 to move upwards, meanwhile, the pulling component 30 is driven to move upwards, the pulling component 30 pulls the flywheel cover 2 connected with the pulling component to move upwards to leave the flywheel cover base 3, and the lifting main machine 10 and the flywheel 1 are relatively fixed and unchanged, as shown in fig. 3. When the flywheel housing 2 is lifted to a desired height, as shown in fig. 4, the lead screw 13 stops rotating, and the lifting assembly 20 is positioned at a corresponding height of the lifting main body 10. The insulating support rod 50 is placed below the flywheel cover 2, and the flywheel cover 2 is supported on the flywheel cover base 3.

Compared with the existing method of building a scaffold and the like, the lifting of the flywheel cover 2 is simple in structure and installation, the lifting operation of the flywheel cover 2 is simple and convenient, the time is greatly shortened, the cost is reduced, the manpower is reduced, and the lifting device has the advantages of high reaction speed, high safety and the like.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A flywheel cover lifting device is characterized by comprising a lifting host, a lifting assembly and a plurality of pull-connecting assemblies, wherein the lifting host is vertically connected to a flywheel of a motor and is relatively fixed with the flywheel, the lifting assembly is arranged on the lifting host and can move up and down along the lifting host, and the pull-connecting assemblies are connected between the lifting assembly and a flywheel cover;

2. The flywheel cover lifting device according to claim 1, wherein the lifting main machine comprises a base used for being matched with the flywheel and locked on the flywheel, a supporting cylinder vertically connected to the base, and a screw rod arranged in the supporting cylinder, wherein the screw rod is vertically connected to the base and can rotate relative to the base and the supporting cylinder;

3. The flywheel housing lifting device according to claim 2, wherein the lifting assembly comprises a connecting ring which is positioned in the supporting cylinder and is sleeved on the periphery of the screw rod through screw thread fit, a lifting ring which is sleeved on the periphery of the supporting cylinder, and at least one connecting part;

4. The flywheel housing lifting device according to claim 3, wherein a plurality of connecting rings are arranged at intervals on the periphery of the lifting ring, and each connecting ring is connected with one of the pull-connecting assemblies;

the pull-connection assembly comprises a double-hook pull ring, one hook part of the double-hook pull ring is connected with the connecting ring in a hanging mode, and the other hook part of the double-hook pull ring is connected with the flywheel cover in a hanging mode.

5. The flywheel cover lifting device according to claim 4, wherein said pull tab assembly further comprises a side pull bail for locking to said flywheel cover; the other hook part of the double-hook pull ring is connected with the side pull hanging ring in a hanging mode.

6. The flywheel cover lifting device according to claim 2, wherein said lifting main frame further comprises a drive motor disposed within said base; the driving motor is connected with the lead screw and drives the lead screw to rotate.

7. The flywheel cover lifting device according to claim 6, wherein said lifting main body further comprises a hand wheel; the hand wheel is arranged at the top of the supporting cylinder and is relatively fixedly connected with the lead screw, and the hand wheel rotates to drive the lead screw to rotate.

8. The flywheel cover lifting device according to claim 2, wherein the lifting main body further comprises a hand wheel; the hand wheel is arranged at the top of the supporting cylinder and is relatively fixedly connected with the lead screw, and the hand wheel rotates to drive the lead screw to rotate.

9. The flywheel housing lifting device according to any of claims 1 to 8, further comprising a plurality of diagonal struts for supporting between the lifting main unit and the flywheel;

10. The flywheel housing lifting apparatus of claim 9, wherein one end of the diagonal strut is pivotally connected to the lifting frame and the opposite end is removably connected to the flywheel.

11. The flywheel housing lifting device according to claim 10, wherein a plurality of connecting lugs are provided on the top of the lifting main body corresponding to the inclined supporting rods; one end of each inclined supporting rod is connected with the connecting lug through a rotating shaft.

12. The flywheel housing lifting device according to claim 10, wherein the other end of the diagonal lever is provided with a magnetic attraction seat, and the other end of the diagonal lever is attracted to the flywheel through the magnetic attraction seat.

13. The flywheel cover lifting device according to claim 9, further comprising a plurality of insulating struts for supporting between the flywheel cover and the flywheel cover base after the flywheel cover is lifted to a predetermined height.

14. The flywheel housing lifting device according to claim 9, further comprising a storage box for storing the lifting main, the pull-on assembly and the diagonal brace; and/or the presence of a gas in the gas,

the flywheel housing lifting device further comprises a power box.