CN216004991U

CN216004991U - Thrust bearing lifting appliance for maintenance without lifting pump

Info

Publication number: CN216004991U
Application number: CN202122485557.7U
Authority: CN
Inventors: 薛春阳; 杨悦
Original assignee: Baoding Xianqi Power Equipment & Technology Co ltd
Current assignee: Baoding Xianqi Power Equipment & Technology Co ltd
Priority date: 2021-10-15
Filing date: 2021-10-15
Publication date: 2022-03-11
Anticipated expiration: 2031-10-15

Abstract

The utility model discloses a thrust bearing lifting appliance without pump lifting maintenance, which comprises a support frame, cross beams, tracks and a plurality of groups of lifting appliances, wherein the two cross beams are connected at the top of the support frame, the tracks are arranged perpendicular to the cross beams, one ends of the tracks are connected on the bottom surfaces of the cross beams through bolts, a travelling crane is connected on the tracks in a hanging manner, and a second hand-pull hoist is installed on the travelling crane; orbital both sides are provided with first hand-operated block, and first hand-operated block is connected on the crossbeam, is provided with the pneumatic cylinder on the middle top surface of crossbeam, and the pneumatic cylinder passes through the hydraulic stem fixed plate to be installed on the crossbeam, and the pneumatic cylinder passes through pull rod assembly to be connected with the chain assembly of below, and first hand-operated block, second hand-operated block during operation are connected with the part on the CRF pump that the below was waited to overhaul through the chain of looks adaptation. The utility model has compact layout and convenient and fast use, adopts the hydraulic cylinder to lift the pump shaft, reduces the labor intensity and is convenient for controlling the lifting speed; the safety nut is arranged to play a secondary protection role in the pump shaft.

Description

Thrust bearing lifting appliance for maintenance without lifting pump

Technical Field

The utility model relates to an overhaul hoist technical field, especially relate to a do not hang pump and overhaul thrust bearing hoist.

Background

The CRF (circulating water system) is a circulating water system of a nuclear power plant, and the function of a conventional island closed cooling water System (SRI) for supplying cooling water to a condenser and an auxiliary cooling water System (SEN) of each unit through two independent water inlet channels is to discharge the circulating water into the sea through a siphon well. The CRF system mainly comprises the following devices: circulating water pump and motor, wherein, circulating water pump: the water outlet part of the vertical mixed flow pump is usually of a concrete volute structure, the driving mode is that a motor is driven after being decelerated by a reduction gear box, and main parts such as an impeller and the like of the vertical mixed flow pump adopt duplex stainless steel to resist seawater corrosion. The normal operation working condition of the pump shaft seal adopts the packing seal, the packing seal water comes from a drinking water System (SEP), and the expansion seal is adopted during the maintenance; a motor: the power of the vertical alternating current asynchronous motor is about 6500kw, the motor is water-cooled, and a heat exchanger is arranged on the side wall of the motor.

Circulating water pumps are the largest volume pumps in nuclear power plants and have a surprising liquid delivery capacity, delivering up to 11 million cubic meters of seawater per hour. In the use process, in order to ensure the normal operation of the system, when the use frequency reaches a set value, the water pump needs to be overhauled. How to provide a do not hang pump and overhaul thrust bearing hoist, convenient operation, safe and reliable can improve the maintenance quality of CRF pump, shortens the maintenance time, becomes the technological problem that technical staff in the field need to solve urgently.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a do not hang pump and overhaul thrust bearing hoist solves traditional hoist and mount and overhauls, and maintenance duration is long, the difficult problem of guaranteeing of safety.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model relates to a do not have pump hoist to overhaul thrust bearing hoist, including support frame, crossbeam, track and multiunit hoist and mount apparatus, two the crossbeam parallel arrangement is connected in the top of support frame, the track is perpendicular to the crossbeam sets up, and the orbital one end through bolted connection on the bottom surface of crossbeam, it has the driving to hang on the track, install the second hand-pull block on the driving; orbital both sides are provided with first hand-operated block, first hand-operated block connects on the crossbeam, be provided with the pneumatic cylinder on the middle top surface of crossbeam, the pneumatic cylinder passes through the hydraulic stem fixed plate to be installed on the crossbeam, the pneumatic cylinder passes through pull rod assembly and is connected with the chain assembly of below, first hand-operated block, the second hand-operated block during operation are connected with the part on the CRF pump that the below was treated and is overhauld through the chain of looks adaptation.

Further, track, driving and second hand-operated block one-to-one and the symmetry are provided with two sets ofly, first hand-operated block symmetry is provided with two sets ofly, just first hand-operated block is located the outside of second hand-operated block.

Still further, two the support frame symmetrical arrangement, including trapezoidal main support and middle auxiliary stand, trapezoidal main support includes symmetrical arrangement's vertical support pole and a plurality of cross-support pole, the cross-support pole level is placed and both ends are connected two vertical support pole is last, the auxiliary stand includes the auxiliary rod and many horizontal connecting rods of a slope, the bottom of auxiliary rod is located subaerially, the top of auxiliary rod with the cross-support pole center at trapezoidal main support top is connected, many the horizontal connecting rod is connected perpendicularly on the cross-support pole of trapezoidal main support.

Still further, the crossbeam adopts the I-steel, the crossbeam passes through bolt assembly to be connected on the cross strut at trapezoidal main support top.

The pull rod assembly comprises an upper connecting plate, a lower connecting plate and a plurality of pull rods, wherein the upper connecting plate and the lower connecting plate are respectively positioned at the upper side and the lower side of the cross beam, the upper connecting plate and the lower connecting plate are connected together through the pull rods, the chain assembly is connected to the middle position of the bottom surface of the lower connecting plate, and the center of the upper connecting plate is aligned with the telescopic rod of the hydraulic cylinder; and the telescopic rod of the hydraulic cylinder is started to jack up or lower the upper connecting plate, and the chain component is driven to move upwards or lower through the connecting rod and the lower connecting plate.

Still further, the connecting rod from the top down run through in proper order upper junction plate, pneumatic cylinder fixed plate back and lower connecting plate, be provided with safety nut on the connecting rod, safety nut is located between upper junction plate, the pneumatic cylinder fixed plate.

Still further, the first chain block is a 20T chain block, and the second chain block is a 2T chain block.

Compared with the prior art, the utility model discloses a beneficial technological effect:

the novel thrust bearing lifting appliance without pump lifting maintenance comprises a support frame, a cross beam, a track and a plurality of groups of lifting appliances, wherein the plurality of groups of lifting appliances comprise a middle hydraulic cylinder and a chain assembly, two symmetrically arranged second hand-pulled chain hoists of 2T on a travelling crane and two first hand-pulled chain hoists of 20T; a plurality of groups of hoisting tools are effectively matched for use, so that the dismantling and overhauling operation of the upper back wheel, the upper bearing gland, the shaft head locking nut, the thrust bearing, the pump shaft and the bearing chamber of the CRF pump is completed. The utility model has compact layout and convenient and fast use, adopts the hydraulic cylinder to lift the pump shaft, reduces the labor intensity and is convenient for controlling the lifting speed; the safety nut is arranged to play a secondary protection role in the pump shaft.

Drawings

The present invention will be further explained with reference to the following description of the drawings.

FIG. 1 is a front view of a thrust bearing hanger for maintenance without a pump;

FIG. 2 is a left side view of the thrust bearing hanger of the present invention without a pump crane for maintenance;

FIG. 3 is a top view of the thrust bearing hanger for maintenance without a pump;

FIG. 4 is an enlarged view of the position I in FIG. 1 according to the present invention;

FIG. 5 is an enlarged view of the position II in FIG. 1 according to the present invention;

FIG. 6 is a schematic view of the backrest of the present invention;

fig. 7 is a schematic view of the upper bearing gland of the present invention removed;

fig. 8 is a schematic view of the pump shaft head nut of the present invention removed;

fig. 9 is a schematic view of the thrust bearing of the present invention removed;

FIG. 10 is a schematic view of the invention taken along the line A in FIG. 9;

FIG. 11 is a schematic diagram of the thrust bearing of the present invention being lifted in place;

fig. 12 is a schematic view of the bearing chamber of the present invention removed;

description of reference numerals: 1. a support frame; 101. a trapezoidal main support; 102. an auxiliary support; 2. a cross beam; 3. a track; 4. driving a vehicle; 5. a chain assembly; 501. shackle dismounting; 6. a first chain block; 7. a second hand-pulled gourd; 8. a hydraulic cylinder; 801. a hydraulic cylinder fixing plate; 9. a pull rod; 10. a safety nut; 11. an upper connecting plate; 12. a lower connecting plate; 13. a CRF pump; 14. a hydraulic jack; 15. a long lead screw; 16. a pump shaft connector.

Detailed Description

As shown in fig. 1-5, a thrust bearing lifting appliance for non-suspended pump maintenance comprises a support frame 1, two beams 2, a track 3 and a plurality of groups of lifting tools, wherein the two beams 2 are arranged in parallel and connected to the top of the support frame 1, a plurality of reinforcing beams are vertically arranged at two ends and a middle position of each of the two specific beams 2, two ends of each reinforcing beam and the corresponding beam 2 are welded to form an integral beam frame, two ends of the integral beam frame are fixedly connected to the top of the support frame 1 through bolt assemblies, the track 3 is arranged perpendicular to the corresponding beam 2, one end of the track 3 is connected to the bottom surface of the corresponding beam 2 through bolts, a travelling crane 4 is hung on the track 3, and a second hand hoist 7 is mounted on the travelling crane 4; the both sides of track 3 are provided with first hand-operated block 6, first hand-operated block 6 is connected on the crossbeam 2, be provided with pneumatic cylinder 8 on the middle top surface of crossbeam 2, pneumatic cylinder 8 is installed through hydraulic stem fixed plate 801 on the crossbeam 2, pneumatic cylinder 8 is connected with chain component 5 of below through pull rod component, first hand-operated block, second hand-operated block during operation are connected with the part on the CRF pump 13 that the below was waited to overhaul through the chain of looks adaptation. Specifically, the cross beam 2 is made of I-shaped steel, and the cross beam 2 is connected to a cross support rod at the topmost part of the trapezoidal main support through a bolt assembly; the hydraulic cylinder 8 is arranged in a gap between the two cross beams 2.

Specifically, track 3, driving 4 and second hand-operated block 7 one-to-one and the symmetry are provided with two sets ofly, first hand-operated block 6 symmetry is provided with two sets ofly, just first hand-operated block 6 is located the outside of second hand-operated block 7.

Specifically, two 1 symmetrical arrangement of support frame, including trapezoidal main support 101 and middle auxiliary support 102, trapezoidal main support 101 includes symmetrical arrangement's vertical support pole and a plurality of cross-bar, in this embodiment, the cross-bar includes three from top to bottom, cross-bar level is placed and both ends welded connection is two on the vertical support pole, auxiliary support 102 includes the auxiliary rod and the many horizontal connecting rods of a slope, the bottom of auxiliary rod is located subaerially, the top of auxiliary rod with the cross-bar center at trapezoidal main support top is connected, and specific horizontal connecting rod is provided with two, two the perpendicular welded connection of horizontal connecting rod is in on the middle and lower two cross-bar of trapezoidal main support. The bottom end faces of the longitudinal supporting rod and the auxiliary rod are welded with horizontal supporting plates, a plurality of bolt through holes are formed in the horizontal supporting plates, and when the supporting frame is used, the supporting frame can be tightly connected with the peripheral ground of a CRF pump through screws so as to guarantee the stability of the supporting frame in the using process.

Specifically, the pull rod assembly comprises an upper connecting plate 11, a lower connecting plate 12 and a plurality of pull rods 9, the upper connecting plate 11 and the lower connecting plate 12 are respectively positioned at the upper side and the lower side of the cross beam 2, the upper connecting plate 11 and the lower connecting plate 12 are connected together through the pull rods 9, the chain assembly 5 is connected to the middle position of the bottom surface of the lower connecting plate 12, and the center of the upper connecting plate 11 is aligned with the telescopic rod of the hydraulic cylinder 8; and starting a telescopic rod of the hydraulic cylinder 8 to jack up or lower the upper connecting plate 11, and driving the chain assembly 5 to move up or lower through the connecting rod and the lower connecting plate, so that the hoisting operation of parts during maintenance of the CRF pump 13 is completed. Specifically, the chain assembly 5 comprises a chain body and shackles 501, the two ends of the chain body are connected with the shackles 501, and the top of the chain body is connected to the lower connecting plate 12 of the pull rod assembly through one of the shackles 501.

Specifically, the two ends of the connecting rod 9 are set to be threaded connection ends, the top of the connecting rod is penetrated through the upper connecting plate and then fastened through nuts, the lower end of the connecting rod is penetrated through the hydraulic cylinder fixing plate 801 and fastened through nuts after the lower connecting plate 12 is penetrated through, the safety nut 10 is arranged in the middle of the connecting rod 9, the safety nut 10 is located between the upper connecting plate 11 and the hydraulic cylinder fixing plate 801, the safety nut 10 is located and connected on the connecting rod 9, and the bottom surface of the safety nut 10 is abutted to the top surface of the hydraulic cylinder fixing plate 801 to achieve locating when the pull rod moves up and down.

Specifically, according to the difference of action part when dismantling, first chain block 6 chooses for use 20T chain block, second chain block 7 chooses for use 2T chain block.

As shown in fig. 6-12, the utility model is used as follows:

the first step is as follows: and assembling the lifting appliance on site and fixing the lifting appliance on the ground.

The second step is that: as shown in fig. 6, two second hand-pulling hoists 7, namely 2T hand-pulling hoists, lift the backrest wheel away from the pump shaft, and the hand-operated traveling crane moves the backrest wheel to the pit side along the track and places the backrest wheel on the ground;

the third step: as shown in fig. 7, the upper bearing gland is removed in the same manner;

the fourth step: as shown in fig. 8, the pump shaft connecting piece 16 is fixed on the pump shaft, the pump shaft connecting piece 16 is connected with the shackle 501 at the bottom of the chain body above, the hydraulic cylinder 8 at the top of the beam is manually pressed, the pump shaft is lifted by 0.5mm (measured by a dial indicator), and the safety nut 10 is locked; then, the pump shaft head locking nut is rotated out, the pump shaft head locking nut moves upwards to the position shown in the figure and is held by hands, the pump shaft is lifted by the first hand-pulling hoists 6 with two sides 20T during operation, the hydraulic cylinder 8 releases pressure, the safety nut 10 is opened, the shackle 501 is detached, and the locking nut is led out from the lower part of the chain body.

The fifth step: as shown in fig. 9 and 10, the pump shaft is lifted by the chain assembly again to replace a first chain block of 20T, at this time, a thrust bearing is fixedly connected by 10 long lead screws 15, three hydraulic jacks 14 are uniformly arranged on the end surface of the pump shaft, and the thrust bearing is separated from the bearing position after the thrust bearing is moved upwards by 200mm through manually operating the hydraulic jacks 14; as shown in fig. 11, the thrust bearing is then lifted to a specified height position with the second 2T hoist 7; and then the pump shaft is lifted by the first chain block 6 of 20T to replace the chain body, and finally the thrust bearing is led out from the lower end of the chain body.

And a sixth step: as shown in FIG. 12, the second 2T hoist 7 was connected to the lifting lugs on both sides of the bearing chamber, and the bearing chamber was lifted up by 300 mm.

Through the operation of the above steps, the work of dismantling the thrust bearing without hanging the pump shaft is completed, and after the maintenance of the parts is completed, the parts are inverted according to the above steps, so that the complete maintenance, disassembly and assembly operation is completed at one time.

Through this hoist overall structure compactness, convenient to use is swift, quick, the maintenance operation of accomplishing CRF pump safely, effectual reduction intensity of labour has promoted work efficiency.

The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and those skilled in the art should also be able to make various modifications and improvements to the technical solution of the present invention without departing from the spirit of the present invention, and all such modifications and improvements are intended to fall within the scope of the present invention as defined in the appended claims.

Claims

1. The utility model provides a do not hang pump and overhaul thrust bearing hoist which characterized in that: the lifting device comprises a support frame, cross beams, rails and a plurality of groups of lifting appliances, wherein the two cross beams are arranged in parallel and connected to the top of the support frame, the rails are perpendicular to the cross beams, one ends of the rails are connected to the bottom surfaces of the cross beams through bolts, a travelling crane is hung on the rails, and a second hand-pulled hoist is mounted on the travelling crane; orbital both sides are provided with first hand-operated block, first hand-operated block connects on the crossbeam, be provided with the pneumatic cylinder on the middle top surface of crossbeam, the pneumatic cylinder passes through the hydraulic stem fixed plate to be installed on the crossbeam, the pneumatic cylinder passes through pull rod assembly and is connected with the chain assembly of below, first hand-operated block, the second hand-operated block during operation are connected with the part on the CRF pump that the below was treated and is overhauld through the chain of looks adaptation.

2. The non-suspended pump service thrust bearing hanger of claim 1, wherein: track, driving and second hand-operated hoist one-to-one and the symmetry are provided with two sets ofly, first hand-operated hoist symmetry is provided with two sets ofly, just first hand-operated hoist is located the outside of second hand-operated hoist.

3. The non-suspended pump service thrust bearing hanger of claim 1, wherein: two support frame symmetrical arrangement, including trapezoidal main support and middle auxiliary stand, trapezoidal main support includes symmetrical arrangement's vertical support pole and a plurality of cross-support pole, the cross-support pole level is placed and both ends are connected two vertical support pole is last, the auxiliary stand includes the auxiliary rod and many horizontal connecting rods of a slope, the bottom of auxiliary rod is located subaerially, the top of auxiliary rod with the cross-support pole center at trapezoidal main support top is connected, many the horizontal connecting rod is connected perpendicularly on the cross-support pole of trapezoidal main support.

4. The non-suspended pump service thrust bearing hanger of claim 3, wherein: the cross beam is made of I-shaped steel and is connected to the cross support rod at the top of the trapezoidal main support through a bolt assembly.

5. The non-suspended pump service thrust bearing hanger of claim 1, wherein: the pull rod assembly comprises an upper connecting plate, a lower connecting plate and a plurality of pull rods, the upper connecting plate and the lower connecting plate are respectively positioned at the upper side and the lower side of the cross beam, the upper connecting plate and the lower connecting plate are connected together through the pull rods, the chain assembly is connected to the middle position of the bottom surface of the lower connecting plate, and the center of the upper connecting plate is aligned with the telescopic rod of the hydraulic cylinder; and the telescopic rod of the hydraulic cylinder is started to jack up or lower the upper connecting plate, and the chain component is driven to move upwards or lower through the connecting rod and the lower connecting plate.

6. The non-suspended pump service thrust bearing hanger of claim 5, wherein: the connecting rod sequentially penetrates through the upper connecting plate, the hydraulic cylinder fixing plate and the lower connecting plate from top to bottom, a safety nut is arranged on the connecting rod, and the safety nut is located between the upper connecting plate and the hydraulic cylinder fixing plate.

7. The non-suspended pump service thrust bearing hanger of claim 1, wherein: the first chain block is a 20T chain block, and the second chain block is a 2T chain block.