CN1293572C - Pump equipment of reactor power station and its maintenance equipment - Google Patents

Abstract

A vertical pump and suction valves and discharge valves accompanying the vertical pump supported from the building ceiling or wall are arranged in a neighboring building to the pump station or upstairs or downstairs thereof so that the pump body and valves are separated in placing positions. By separating in this manner, checking capability for the vertical pump and valves is ensured, economical piping route is constituted and the building height can be limited to the pump height plus pump maintenance height in the pump arrangement area. Also, the building height in the valve area can be only maintenance height, so the building inside height can be reduced and exposure during disassembling and checkup work can be reduced by separating the maintenance work area.

Description

The pumping unit of nuclear plant

The present invention be that March 27, application number in 2000 are 03158479.9 the applying date, denomination of invention divides an application for the application for a patent for invention of " pumping unit of nuclear plant and maintenance of equipment thereof ".

Technical field

The present invention relates to a kind of pumping unit and maintenance of equipment thereof of nuclear plant.

Background technology

Below with reference to Figure 16 the pumping unit in the existing nuclear plant is described.In Figure 16, label 1 for example is that the buildings of nuclear plant drives body, the 2nd, machine chamber, the 3rd, vertical shaft type pump.Vertical shaft type pump 3 mainly is made of pump main body 4 and pump case 5, is provided with by the ceiling suspention of pump support 6 from machine chamber 2.

In nuclear plant, the suction valve of setting up on the pipe arrangement 7 in order to ensure pump main body 4 maintainabilities and vertical shaft type pump 3 and the maintainability of exhaust valve 8 are not subjected to the influence of pipe arrangement route especially, will be arranged on the higher machine chamber of story height 2 from the vertical shaft type pump 3 that suspentions such as buildings body 1 are provided with.

When carrying out the maintenance of vertical shaft type pump 3, vertically downward and the motors of installing in the drawing pump main body 4, rotor, impeller etc. with pump main body 4.Because suction inlet and escape hole are installed in the top of pump,, promptly be arranged on the top of the machine chamber 2 that is provided with vertical shaft type pump 3 so the pipe arrangement 7, suction valve and the exhaust valve 8 that when having no special requirements, suck, discharge are arranged on the top of vertical shaft type pump 3.

At this moment, in order to ensure pump main body 4 and suction valve and exhaust valve 8 both sides' maintainability, the top of machine chamber 2 must have when maintenance vertical shaft type pump 3 operating personnel 10 can maybe can make the space and the height L that use the maintenance area near above-mentioned each valve 8.

Therefore, the story height bottom lines in the machine chamber 2 need 2 thickness of upper stage 9 extraordinarily of height L (needing more than the 1.8m usually) that operating personnel 10 will be approaching, and this has just hindered the reduction of machine chamber 2 height.In addition, though vertical shaft type pump 3 operation is set the time, yet need the operation that vertical shaft type pump 3 is sling in the vertical, installed.

Also have, if vertical shaft type pump 3 is to carry radioactive fluid, then when these maintenance activities, the operating personnel can be subjected to radiation exposure, reduce operating personnel 10 will with approaching height L will cause the deterioration of operating condition and the postponement of operation, and then exposure is increased.

Below, with reference to the step a to h of Figure 17, the method for maintaining of existing hanging type vertical shaft type pump 3 is described.

A, get rid of in the pump case 5 and the fluids in the motor, after cleaning, unload decompose the motor cooling can out of order auxiliary device 12 in processes such as pipe arrangements etc.B, in order to comprise motor sub-assembly 15 drawing vertically downward of impeller 13, rotor 14, suspension hook that be by setting up on the pump case 5, support motor sub-assemblies by cranes such as chain block 16.

C, unload the part (nut 17 etc.) that makes motor sub-assembly 15 and pump case 5 mechanical bond.D, prepare below the vertical shaft type pump 3 mobile trolley used 11 on, with crane 16 motor sub-assembly 15 is hung time.E, because from motor sub-assembly 15 drawing impeller 13, rotor 14 upward, so motor sub-assembly 15 position under the vertical shaft type pump 3 is moved in the locational maintenance area that can use crane 16 that is provided with single track 18, suspension hook etc. by chassis 11.

F, in order to carry out the apportioned effort of motor sub-assembly 15, motor sub-assembly 15 moved from chassis 11 be placed on motor sub-assembly and support on the stand 19.G, by manpower or crane 16 with impeller 13 from rotor 14 to the vertical direction drawing.H, then, with crane 16 with rotor 14 from motor case 20 to the vertical direction drawing.I, the motor back of the body is covered 21 unload.J, the various members that decompose are checked after cleaning, the reverse procedure by above-mentioned operation during assembling is carried out.

Carry out the maintenance activity of vertical shaft type pump 3 as described above, but when motor sub-assembly 15 is decomposed, need the height A of unloading lower back lid 21, the height B of motor case 20, the drawing height C of rotor 14, the desired height D of crane 16 that begin from ground.

When vertical shaft type pump 3 is set, because pump main body 4 is long in vertical direction and be to make the motor sub-assembly 15 that comprises motor, impeller etc. from vertically drawing and decompose required height and the size of the needed short transverse of valve 8 service clearances that is used for vertical shaft type pump 3 and this pump 3 are set up of pump case 5 when the maintenance of vertical shaft type pump 3, thereby the configuration of vertical shaft type pump 3 just can only be limited to part that quite abundant floor height is arranged like this.

In addition, when vertical shaft type pump 3 is set, owing to be high-rise working, so not only need labour and time, and when the motor that decomposes vertical shaft type pump 3, impeller, the motor sub-assembly 15 that will comprise these members is transported to the zone of putting down after vertical direction is pulled out from pump case 5, with crane 16 grades impeller 13, rotor 14 are drawn back decomposition then.Therefore, when operation, require great effort very much, particularly carry the pump of radioactive fluid, then also exist the operating personnel to be subjected to the problem of radiation exposure.

Be to cut down the cost of nuclear energy power generation plant, wish to dwindle buildings size, make and build rationally; Operating efficiency, the reduction of wishing to improve the operating personnel when the plant maintenance operation are subjected to radiation exposure; When the configuration construction of the setting of vertical shaft type pump 3 and pipe arrangement, valve etc., pump maintenance, wish to reduce workload and reduce the exposure amount.Just proposed to satisfy a problem of these hope.

Summary of the invention

The present invention makes in order to address the above problem, its objective is pumping unit and maintenance of equipment thereof that a kind of nuclear plant is provided, so as to reduce the buildings story height be provided with suspention support type vertical shaft type pump, improve operating efficiency, the operation when making the pump maintenance is more laborsaving, reduce radiation exposure, and makes the quantity that maintains machinery carry out reasonable disposition.

The pumping unit of nuclear plant of the present invention is characterized in that, its formation comprises:

Be assemblied in a plurality of screw rods on the pump case of vertical shaft type pump; Be inserted in the screening cover that assembles in these screw rods; The folding that be equipped with this screening cover, can move along in-plane; And make the screening cover that is assemblied in this folding brace table that has the round end screw rod of displacement along the vertical direction by the round end screw rod.

The pumping unit of nuclear plant of the present invention is characterized in that:

In being provided with by steel, buildings pump chamber by the vertical shaft type pump of the ceiling of buildings or wall supports, the pump main body of above-mentioned vertical shaft type pump and set up the suction of shell on the pump, pillar, stand, pump and discharge pipe arrangement and valve and body bury underground device class part, and other devices give being installed in earlier and pour into a mould on the template, become integrated member, this integrated member directly hangs in the assigned position of building site, constitutes the ceiling of above-mentioned pump chamber.

The pumping unit of nuclear plant of the present invention is characterized in that:

In being provided with by steel, buildings pump chamber by the vertical shaft type pump of the ceiling of buildings or wall supports, the pump main body of not only above-mentioned vertical shaft type pump and set up device on the pump, and other devices also utilize cast template, reinforcing member, other steel etc., be unit, make big module component in advance with ground, wall, room etc., this big module component directly hangs in the assigned position of building site, constitutes the ceiling of above-mentioned pump chamber.

In above-mentioned vertical shaft type pumping unit of the present invention, can dwindle the machine chamber that the vertical shaft type pump is set or inside dimension, the volume of pump chamber.In addition, when carrying the vertical shaft type pump of radioactive fluid, be subjected to the irradiation of ray during by the reduction maintenance activity, can guarantee operational security, can reduce service charges simultaneously.

And, owing to adopt assembled in advance device class, and heavy die block construction method, thereby can the reduction of erection time, because shared, thereby can remove the labyrinth wall of shielding usefulness, thereby can reduce cost and reduce planar dimension reducing irradiated device.

On the other hand, because in the pump maintenance of equipment, on the chassis of pulling out motor and the impeller set up on the vertical shaft type pump, moving it usefulness, set up framework rotating mechanism, chassis fixed mechanism, remote-controlled operation function, thereby the security can guarantee the pump maintenance activity time, the chassis location is oversimplified, can reduce the workload of pump maintenance, can reduce the operating personnel and be subjected to radiation exposure.

Because the pumping unit of nuclear plant of the present invention separates the configuration of pump main body and valve and pipe arrangement, thereby can dwindle the size and the volume of buildings.And, make story height minimization in machine chamber that the vertical shaft type pump is set or the pump chamber, make and be of a size of the shortlyest radioactive fluid pipe arrangement disposed chamber in, owing to be subjected to radiation exposure can reduce maintenance activity the time, thereby reduction operation intensity, can reduce cost.

These and other purposes of the present invention, advantage and feature will be in conjunction with the drawings to the description of embodiments of the invention and further specified.In these accompanying drawings:

Description of drawings

Fig. 1 is the skiagraph of the 1st embodiment part summary of expression pumping unit of the present invention.

Fig. 2 is the skiagraph of the 2nd embodiment part summary of expression pumping unit of the present invention.

Fig. 3 is the skiagraph of the 3rd embodiment part summary of expression pumping unit of the present invention.

Fig. 4 is the skiagraph of the 4th embodiment part summary of expression pumping unit of the present invention.

Fig. 5 is the sectional drawing of the 5th embodiment part summary of expression pumping unit of the present invention.

Fig. 6 (a) is the top view of the 6th embodiment part summary of expression pumping unit of the present invention.

Fig. 6 (b) is the top view of the conventional example of expression and Fig. 6 (a) contrast.

Fig. 7 is the oblique view of the 7th embodiment part summary of expression pumping unit of the present invention.

Fig. 8 is the oblique view of the 8th embodiment part summary of expression pumping unit of the present invention.

Fig. 9 (a) is the top view of the 9th embodiment part summary of expression pumping unit of the present invention.

Fig. 9 (b) expression is assemblied in state skeleton view on the pump case with the screening cover on Fig. 9 (a).

Figure 10 is the oblique view of the 1st example of expression pump maintenance of equipment embodiment of the present invention.

Figure 11 (a) is a front elevation of representing the 2nd example of pump maintenance of equipment embodiment of the present invention with local section.

Figure 11 (b) is the front elevation that the chassis fixed mechanism among Figure 11 (a) is amplified in expression.

Figure 12 (a) is the front elevation of the 3rd example of expression pump maintenance of equipment embodiment of the present invention.

Figure 12 (b) expression is carried out the state top view that chassis moves from the state of Figure 12 (a).

Figure 13 (a) is the top view of the 4th example of expression pump maintenance of equipment embodiment of the present invention.

Figure 13 (b) is the top view that major part among Figure 13 (a) is amplified expression.

Figure 14 (a) is the top view of the 5th example of expression pump maintenance of equipment embodiment of the present invention.

Figure 14 (b) is the top view that major part among Figure 14 (a) is amplified expression.

Figure 15 is the front elevation that explanation utilizes the maintenance step of pump maintenance of equipment of the present invention.

Figure 16 is the sectional drawing of the indoor configuration of pumping unit of the existing nuclear plant of expression.

Figure 17 is the front elevation of the existing vertical shaft type pump maintenance of explanation step.

Embodiment

The 1st embodiment of vertical shaft type pumping unit of the present invention is described below with reference to Fig. 1.

The part identical with Figure 16 is added with same label in Fig. 1.The part that repeats is omitted.Present embodiment is provided with the story height machine chamber 24 lower than conventional example in buildings body 23, in this machine chamber 24, suspend vertical shaft type pump 3 in midair setting from ceiling, with above-mentioned machine chamber 24 adjacent settings in chamber 25, dispose pipe arrangement 7 and suction valve and exhaust valve (to call valve in the following text) 8.

That is, in Fig. 1, pipe arrangement 7 and the valve 8 that in abutting connection with chamber 25 in configuration vertical shaft type pumps 3 set up adjacent with the machine chamber 24 of the vertical shaft type pump 3 that is provided with, and vertical shaft type pump 3 and valve 8 disposed side by side.Like this in the pump zone, owing to there is not valve, just needn't the valve of top in the machine chamber 24 be keeped in repair, only the height that keeps in repair required usefulness by pump just can determine the story height that machine chamber 24 is interior.

For the valve zone, the valve maintenance is irrelevant with the platform and the pump maintenance desired height of stand 9, only considers that the position of valve 8 just can be set, and can improve the configuration degree of freedom of vertical direction, reduces the story height of machine chamber 24.

By reducing story height, shortening the length of the supporting construction member (supporting 6) of suspension type support type vertical shaft type pump 3 to call in the following text, be added to the moment that pump supports on 6 and also reduced, can improve shock resistance.

When vertical shaft type pump 3 and valve 8 being separated by wall, viewpoint from economy, should set for the pipe arrangement 7 that is configured in the pump area side the shortest, promptly the piping length in machine chamber 24 is same also shorter when indoor than valve is configured in, this just means that the radioactive ray line source in the machine chamber 24 tails off when the vertical shaft type pump is carried radioactive fluid.Therefore, the operating personnel is subjected to radiation exposure in the time of can reducing the pump maintenance.

Below with reference to Fig. 2 of the present invention 2nd embodiment corresponding with claim 2 is described.

Present embodiment is provided with vertical shaft type pump 3 from ceiling in the very low machine chamber 24 of story height as shown in Figure 2 with suspending in midair, pipe arrangement 7 and the valve 8 set up on the configuration vertical shaft type pump 3 in the set chamber upstairs 26 of the last layer of machine 24.

If adopt the present invention, the valve of setting up on the configuration vertical shaft type pump 3 in the room upstairs of the machine chamber 24 that is provided with vertical shaft type pump 38 separates vertical shaft type pump 3 and valve 8 up and down.Like this, the same with the foregoing description, can only keep in repair with the story height in the required height decision machine chamber 24 by pump.

In addition,, valve 8 can be configured near the ground, when the maintenance of valve 8, as long as there is the height that operating personnel 10 can be approaching just enough for the valve zone.Can improve the degree of freedom of the height setting of the chamber upstairs 26 that valve is set, reduce the story height of machine chamber 24.And then with the above-mentioned the same shock resistance that improves, operating personnel's exposure in the time of when handling radioactive fluid, can reducing the pump maintenance.

Below with reference to Fig. 3 of the present invention 3rd embodiment corresponding with claim 3 is described.

In the present embodiment, in the very high machine chamber 26 of story height, vertical shaft type pump 3 is provided with from ceiling with suspending in midair, and the ground that is positioned at vertical shaft type pump 3 belows of machine chamber 26 is provided with hatchway 28, is provided with Maintenance Room 29 in the lower floor room of the machine chamber 26 that is provided with vertical shaft type pump 3.

, in the existing maintenance steps d of Figure 17, e,, motor sub-assembly 15 below need be hung from pump case bolt 22 herein, the minimum constructive height on ground can be determined from the installation site of pump thus in order to pull motor sub-assembly 15 from pump case 5.

But, according to present embodiment, by being provided with hatchway 28 on the ground below pump 3 27, as long as the height of hatchway 28 thickness that can handle hatchway 28 is arranged in the pump bottom, no matter the story height of pump setting area how, just the Maintenance Room 29 of motor sub-assembly to lower floor can be pulled, carries, thereby reduce the story height of pump setting area.In addition, maintenance can be carried out in the zone of the pipe arrangement that does not contain radioactive fluid of lower floor, can reduce exposure when maintenance.

Below with reference to Fig. 4 of the present invention 4th embodiment corresponding with claim 4 is described.

Present embodiment is provided with Maintenance Room 29 in the lower floor of vertical shaft type pump 3, by the supporting member 30 of steel with the part of the pump case 5 of vertical shaft type pump 3 can be from ground 27 the direct support fixation of body.

According to present embodiment, can near centre of gravity place, support vertical shaft type pump 3, as shown in figure 16,, can reduce moment above pump case 5 owing to compare with pump support 6 is set, therefore can improve shock resistance.

In addition, when vertical shaft type pump 3 was handled radioactive fluid, this radioactive fluid can not flow to the below from pump case 5, promptly can be from ground 27 slab lower end planar flows downwards.This is because pump case 5 beginnings are downwards the motor parts.

Therefore, no matter be when turning round pump usually, still when the maintenance of vertical shaft type pump 3,, thereby in this zone, can reduce operating personnel's exposure because territory, motor one lateral areas radiographic source only is limited to the part of pump case 5.

Below with reference to Fig. 5 of the present invention 5th embodiment corresponding with claim 5 is described.

Present embodiment is right side pump chamber 34 and left side pump chamber 35 by longitudinal baffle 32 and lateral partitions 33 shieldings as shown in Figure 5 in buildings body 31.Configuration right side pump 3a in right side pump chamber 34, and in left side pump chamber 35, dispose left pump 3b.

Slide rail 36 is laid in front in lateral partitions 33, and shielding barrier 37 is installed on slide rail 36.On buildings body 31, be provided with gateway 38, with between gateway 38 and the slide rail 36 as maintenance area 39.

That is, in the present embodiment, by two adjacent pump chamber 34,35 shared shieldings barriers 37 of transferring radioactive fluid.Usually, handle the pump of nuclear plant's radioactive fluid, consider that residue property will be provided with the pump of 2 above same use.

Therefore, when maintenance this pump 3a, 3b, in the middle of many pump 3a, 3b always at least 1 remain in operation, in addition, consider from the economical point of power plant building thing, for pump 3a, the 3b of same use, the floor area of building can be reduced in a shared maintenance area 39 shown in netting twine part among Fig. 5.

At this moment, when the left pump 3b shown in the service action drawing, the operating personnel in the maintenance area 39 will be subjected to penetrating from right side pump 3a the irradiation of the ray that comes before the inlet of right side pump chamber 34.Pump 3a exposure to the operating personnel in operation process in right side will increase.

Relative therewith, in the present embodiment in the inlet front of two pump chambers 34,35 of a shared maintenance area 39, have shielding that material that a utilization has shielding properties constitutes with barrier 37 by slide rail 36, when right side pump 3a keeps in repair, will reduce from left side pump chamber 36 and penetrate of the irradiation of next ray the operating personnel in the maintenance area 39, and the part of pump chamber 35,35 fronts of maintenance area 39 as the operation area, can be utilized effectively.

Below with reference to Fig. 6 (a) the present invention corresponding with claim 6 the 6th embodiment is described.

Present embodiment is shown in Fig. 6 (a), pump chamber 40 with gateway 38 and maintenance area 39 is set in buildings body 31, in this pump chamber 40 vertical shaft type pump 3 is set, this vertical shaft type pump 3 is provided with screen door 41, and it has the mechanism of sliding along the transverse direction of vertical shaft type pump 3 fronts.Fig. 6 (b) is the configuration of existing pump equipment, in order can not directly to see as radiogenic vertical shaft type pump 3, pipe arrangement 7 and valve 8 from the pump chamber inlet, is provided with labyrinth wall 42, forms a labyrinth path 43.

In the present embodiment, by the shield door 41 that is provided with slide mechanism, when moving vertical shaft type pump 3 to maintenance area 39 in when maintenance, can it can not directly be seen all closing 41 li of shield doors as radiogenic vertical shaft type pump 3, pipe arrangement 7, valve 8.

And, when pump keeps in repair, compared with the existing, since be operation in can not directly seeing the zone of pipe arrangement 7, valve 8, thus irradiation can be reduced to the operating personnel, owing to do not adopt existing shielding labyrinth wall 42, can remove labyrinth path 43, so can dwindle the space in the pump chamber 40.

Below with reference to Fig. 7 the present invention corresponding with claim 7 the 7th embodiment is described.

Present embodiment as shown in Figure 7, on cast template 44 fixed pump support 6, pipe arrangement support 45 and pipeline support 46, support at pump pump case 5 be installed on 6, support at pipe arrangement pipe arrangement 7 is installed on 45, support 46 pipe layings 47 at pipeline, form the ceiling of pump chamber thus.

Promptly, with pump (not drawing among the figure) and as pump case 5, the pump of the part of pump support 6, the pipe arrangement 7 of the suction of stand (not drawing among the figure), pump, discharge and valve (not drawing among the figure), pipeline 47, cable tray (not drawing among the figure), body are buried machine class (not drawing among the figure) underground, and other machine classes give and being assemblied in earlier on the cast template 44, make it become integrated member.

Present embodiment is by suspension attachment 48, will has the assigned position that the integrated member of pouring into a mould template 44 hangs in the building site with goliath (not drawing among the figure), forms the ceiling of pump chamber.After like this integrated member being hung in, the cast template 44 above adding reinforcing bar (not drawing among the figure), can easily construct ground by placing concrete.

Pour into a mould the following of template 44, connect the ceiling (ground) that just can construct buildings at an easy rate by carrying out machines such as pipe arrangement 7 and pipeline 47 directly as ceiling.Thereby, can reduce site work, reduction of erection time significantly.Also because the setting of the pump that suspension type supports is not the installation exercise that carries out in the narrow zone in the pump chamber after buildings builds up, but can implement in the factory or the good working-yard of transaction capabilities, buildings outside of integrated member structure, so can improve operating efficiency.

Below with reference to Fig. 8 the present invention corresponding with claim 8 the 8th embodiment is described.

Present embodiment as shown in Figure 8, not only the pump case 5 of vertical shaft type pump 3, pump support 6 and the device set up of vertical shaft type pump 3, and cable tray 49 waits other device classes, all is reinforcing member 50, and the big module component (ground piece) 51 on component unit ground such as other steel that utilizes cast template 44, keeps placing concrete weight.In addition, pipe arrangement 7 grades buried underground in the ground and the reinforcing bar (not drawing among the figure) of lower end, ground are set on the cast template 44 on ground.

According to present embodiment, big module component is directly hung in the assigned position of building site by crossbeam 52 and suspension attachment 48 usefulness goliaths (not drawing among the figure).After hanging in big module component 51, on cast template 44, upper end reinforcing bar (not drawing among the figure) is constructed like this, just can easily construct ground by placing concrete.

In addition, can maintain the original state below and directly become ceiling, the effect of the reinforcing member 50 below it, pour into a mould the setting of template 44 and operation being set and having withdrawn from operation of arch centering (not drawing among the figure) again with regard to not needing, can shorten building operation and the engineering time, can also with the above-mentioned installation exercise efficient that improves the vertical shaft type pump 3 of suspension type support the samely.

Below with reference to Fig. 9 (a), Fig. 9 (b) the present invention corresponding with claim 9 the 9th embodiment is described.

Fig. 9 (a) is the synoptic diagram of the shielding of pump case 5 inside when representing pump maintenance in the present embodiment with auxiliary engine, and its formation comprises: the flat board with shielding properties is used as the screening cover in the pump case 5 53; The folding 54 that near its position from vertical shaft type pump 3, rotating shaft center along in-plane towards vertical shaft type pump 3 can be moved; The brace table that the round end screw rod is housed 55 that makes assembling lid 53 thereon can move along the vertical direction, support by round end screw rod (not drawing among the figure) is supported.This brace table 55 mechanically combines with wall by this folding 54.

Utilize Fig. 9, Figure 17 that the screen method of screening cover 53 when pump keeps in repair of the pump case 5 of use present embodiment described below.

The maintenance steps d of Figure 17, the state shown in the e, promptly unload motor sub-assembly 15 from pump case 5 after, screening cover 53 and brace table 55 that the round end screw rod is housed are moved to the axle center of pump case 5 with folding 54.Shown in Fig. 9 (b), be adjusted to the position of pump case screw rod 56 set on the screw rod patchhole 57 and the shell that are set on the screening cover 53 consistent.At this moment screening cover 53 can rotate on brace table 55 with respect to Z-axis.

Then, by the rocking handle that makes the round end screw action (not drawing among the figure), action by the round end screw rod, with supporting its weight, making screw rod 56 pass mode in the screw rod patchhole 57 of screening cover 53, make vertically that the screening cover of direction is assemblied on pump case 5 main bodys, utilize the nut 58 of pump case that screening cover 53 is fixed on the pump case 5 then.

By the assembling of this screening cover 53, just can shield the ray of being emitted, thereby carry out the suffered irradiation of operating personnel of maintenance activity near can being reduced in by the part of radiationization from pump case 5 inboards.In addition, the operation that screening cover 53 is set is the operation towards the top, might be higher than the operation of operating personnel's height, this can increase the burden of the support operation of supporting screening cover 53 weight, but by the operation of round end screw rod, can adjust the position of screening cover 53 easily, can alleviate homework burden.

Below with reference to Figure 10, Figure 11 (a), Figure 12 and Figure 17 of the present invention 10th embodiment corresponding with claim 10 is described.

Present embodiment is installed on the top of chassis 61, with support wedge 62 assembly frames 59, on framework 59 and to be had the motor sub-assembly fixed component 64 of fixed housing with hole 63 as shown in figure 10, constitutes maintaining machinery of pumping unit.

Present embodiment is maintaining machinery of handling of the motor sub-assembly shown in Figure 17 15 when pump is keeped in repair.That is, its formation comprises: the framework 59 of the motor sub-assembly 15 that fixed support separates from the pump case 5 of vertical shaft type pump 3, make the motor sub-assembly 15 that is fixed on the framework 59 with the chassis that has wheel 60 61 of framework 59 support bed of rotatable turning axle, double as turning axle in vertical plane, fixedly chassis 61 position of rotation support chock 62 and be contained in the motor sub-assembly fixed component 64 that has shell fixed orifice 63 on the framework 59.

The pump method for maintaining that maintains machinery below with reference to Figure 10,11,15,17 pairs of use present embodiments describes.

At the maintenance steps d of Figure 17, the state shown in the e, that is, after motor sub-assembly 15 unloaded from pump case 5, motor sub-assembly 15 hung be discharged on the chassis 61 (being label 11 among Figure 17).

Then, step f as shown in figure 15 is such, and the chassis 61 that motor sub-assembly 15 is housed is moved to the zone that can use crane 16 from the top.In this moving process, framework 59 is fixed on the chassis 61 by support wedge 62, by screw rod by the fixed housing that sets on the framework 59 with the screw hole 66 that sets on hole 63 and the pump case 5, make motor sub-assembly 15 be fixed on (with reference to the concept map of Figure 10, the front elevation of Figure 11 (a)) on the framework 59.

Step g is in the scope that can use crane 16, uses fixedly chassis 61 of linchpin 65.When crane 16 is below supporting the pump motor, take off and make framework 59 be fixed on support wedge on the chassis 61, the below of pump motor is lifted, the pump motor axis of rotation is horizontal.Support wedge 62 is inserted and can be fixed with the fixing position of this state.Then, with manpower or crane 16 impeller 13 is pulled out from rotor 14 in the horizontal direction.

At step h, from motor case 20 rotor 14 along continuous straight runs are pulled out by crane 16.Other motors back of the body cover waited also decompose,, assemble by above-mentioned a series of opposite operations to after various parts maintenance, cleaning etc.

In aforesaid maintenance activity, when motor sub-assembly 15 is decomposed, do not need of the prior art from ground to the height B of the height A of taking off back of the body cover 21, motor case 20 and pull out the vertical direction height of the height C etc. of rotor 14, thereby can reduce the required story height in maintenance area (with reference to Figure 17).

In addition, because the height that impeller 13, rotor 14 and back of the body cover 21 etc. carried out resolution process is exactly the height in operating personnel's height scope,, can cut down operation post simultaneously so compare, can make high-rise working to reduce, can make operating efficiency to improve with existing method.

Below with reference to Figure 11 (a), Figure 11 (b) of the present invention 11st embodiment corresponding with claim 11 is described.

Present embodiment is in above-mentioned the 10th embodiment, as shown in Figure 11 (a), Figure 11 (b), in the bottom of chassis 61 the chassis fixed mechanism 67 with structure shown in Figure 11 (b) is set.

The formation of chassis fixed mechanism 67 comprises: set bearing 72 reaches the folding arm 73 of assembling on fixed station 71 near the following set substrate 71 of rocking handle 68, the round end screw rod 69 of the rotation by rocking handle 68, the fixed station 70 that is assemblied in the bottom of this round end screw rod 69, this fixed station 70, the rocking handle 68.

But this chassis fixed mechanism 67 makes the weight of round end screw rod 69 action fixed support chassis 61 by rotation rocking handle 68.In maintenance of equipment, can remove the linchpin 65 that chassis 61 is fixed, the operational security when guaranteeing the pump maintenance.

In addition, when constructure ground was done the sloping in order to carry out draining, the inclination with chassis 61 can be eliminated by this mechanism 67 can make pump component pull out apportioned effort energy high precision and carry out.

Below with reference to Figure 12 (a), Figure 12 (b) of the present invention 12nd embodiment corresponding with claim 12 is described.

Present embodiment is to install to be used for making chassis 61 pulley 74 that moves of route in accordance with regulations in pump chamber 40, pulls on rope 75 on this pulley 74, chassis is moved.Promptly shown in Figure 12 (a), on the wall of the body 31 of pump chamber 40, pulley 74 is installed, utilize pulley 74 and rope 75, can remote-controlled operation and the transportation chassis 61 of motor sub-assembly 15 is moved.The pump method for maintaining that uses this maintenance of equipment is described below with reference to Figure 12.When vertical shaft type pump 3 is keeped in repair, motor sub-assembly 15 to be transported to pump chamber 40 maintenance area in addition sometimes.

When vertical shaft type pump 3 was handled radioactive fluid, the pipe arrangement 7 in the pump chamber 40, valve 8 etc. were by radiationization, in perhaps being in the state of radioactive fluid were arranged and became radioactive source, thereby can make pump chamber 40 interior operating personnels be subjected to radiation exposure.

Consider from this situation, for make its not exposure be provided with labyrinth wall 42 in the gateway 38 of pump chamber 40.When with vertical shaft type pump 3 when carry the maintenance area, still need to prevent operating personnel's exposure of carrying.

In the present embodiment, as shown in Figure 12 (a), with chassis 61 from the part of barrier shield gateway 38 by manpower towards the inside direction of pump chamber 40 move, up to making chassis 61 blocks (not drawing the figure) touch wall.Shown in Fig. 9 (b), pulling is contained in the rope 75 on the chassis 61, by manpower or mechanical driving mechanism operation rope 75, chassis 61 is directed into the position that is provided with of pump by pulley 74 then.At this moment, the operating personnel can carry out supervisory work in an opposite side of the pump of labyrinth wall 42.

Then, vertical shaft type pump 3 is decomposed, be contained in motor sub-assembly 15 on the chassis 61 after, by the operation of rope 75, motor sub-assembly 15 is taken out of from pump chamber 40 with opposite step.By these operations, with chassis 61 carrying motor sub-assemblies 15 time, the operating personnel can avoid near radioactive source.Be subjected to radiation exposure in the time of can reducing the pump maintenance activity like this, in addition,, can accurately carry out the location of chassis 61 under pump by the guiding of pulley 74.

In the present embodiment, though do not have expression among the figure, the automatic hoisting mechanism, motor sub-assembly 15 of on chassis 61, also setting up motor sub-assembly 15 and the automatic handling device of pump case 5 joint bolts etc., it is illuminated further to reduce the operating personnel thus.

In addition, in pump chamber 40,, make terrain slope sometimes, but, on the wheel 60 of chassis 61, height control mechanism is set, can operate the line height adjustment of advancing with rope 75 in order to remove the instability that tilts to cause because of chassis 61 in order to collect radioactive fluid etc.

Below with reference to Figure 13 (a), Figure 13 (b) of the present invention 13rd embodiment corresponding with claim 13 is described.

Present embodiment is in the 12nd embodiment, lays guide rail 76 on the ground of pump chamber 40, moves along this guide rail 76 in order to make chassis 61, is provided with the mechanism 77 that cooperates with guide rail on chassis 61.

According to present embodiment, the chassis 61 that is added with wheel 60 can move along guide rail 76 by the mechanism 77 that guide rail hooks together, and has improved chassis 61 and to pump the positional precision of location guide has been set, and adjustment by position deviation etc. can reduce the operating personnel and be shone.

Below with reference to Figure 14 (a), Figure 14 (b) the present invention corresponding with claim 14 the 14th embodiment is described.

Present embodiment is in the 12nd embodiment, on the ground of pump chamber 40, lay track 78, be provided for track matching mechanism 79 mobile on this track 78 at chassis 61, promptly, set up track matching mechanism 79 on the track of being laid on the ground of pump chamber 40 78 movably on the conveying trolley 61 of motor sub-assembly 15.

According to present embodiment, chassis 61 can move along track 78, has improved the positional precision that the position is set that chassis 61 is directed to vertical shaft type pump 3, by to the adjustment of position deviation, can reduce the irradiation that the operating personnel is subjected to.In addition, owing to can chassis 61 be directed to the setting area of vertical shaft type pump 3, can improve the efficient of transport operation and reduce the irradiation that the operating personnel is subjected to without manpower.

According to the embodiment that maintains machinery, can dwindle building volume, can reduce that the pump maintenance time is shone and reduce labour intensity, improve workability.That can realize being brought by the volume-diminished of buildings reduces cost significantly, in addition, the reduction of irradiation and operation labor intensity reduce during owing to the pump maintenance, thereby service charge is reduced, can improve security, can realize again simultaneously shortening because of workability improves the duration that brings.

And, owing to adopt in addition first assembly ware class, and heavy die block construction method, thereby can the reduction of erection time, because shared, thereby can remove the labyrinth wall of shielding usefulness, thereby can reduce cost and reduce planar dimension reducing irradiated device.

Because the pumping unit of nuclear plant of the present invention separates the configuration of pump main body and valve and pipe arrangement, thereby can dwindle the size and the volume of buildings.And, make story height minimization in machine chamber that the vertical shaft type pump is set or the pump chamber, make and be of a size of the shortlyest radioactive fluid pipe arrangement disposed chamber in, owing to be subjected to radiation exposure can reduce maintenance activity the time, thereby reduction operation intensity, can reduce cost.

Claims (1)

1. the pumping unit of nuclear plant is characterized in that, its formation comprises:

Be assemblied in a plurality of screw rods on the pump case of vertical shaft type pump; Be inserted in the screening cover that assembles in these screw rods; The folding that be equipped with this screening cover, can move along in-plane; And make the screening cover that is assemblied in this folding brace table that has the round end screw rod of displacement along the vertical direction by the round end screw rod.

Images