CN102606537A

CN102606537A - Containment spray pump

Info

Publication number: CN102606537A
Application number: CN2012100833514A
Authority: CN
Inventors: 陆金琪; 顾兴涛
Original assignee: Shanghai Apollo Machinery Co Ltd
Current assignee: Shanghai Apollo Machinery Co Ltd
Priority date: 2012-03-27
Filing date: 2012-03-27
Publication date: 2012-07-25
Also published as: WO2013143451A1

Abstract

The invention discloses a containment spray pump, which is used for the field of nuclear power equipment and comprises an inner cylinder, an outer cylinder, a pump seat, a pump shaft and a bearing. The inner cylinder comprises a flow guide section, a water outlet section, a flow guide shell section, a suction pipe and a suction pipe which are sequentially connected from top to bottom, wherein the flow guide shell section is formed by serially connecting a plurality of flow guide shells. A first flange and a second flange are arranged at the upper end and the lower end of the outer wall of the flow guide section respectively, a third flange and a fourth flange are arranged at the upper end and the lower end of the outer wall of the water outlet section respectively, an inner flange on the pump seat is connected to the first flange, the second flange is connected to the third flange, first rib plates connected with the first flange and the second flange are arranged on the outer wall of the flow guide section, second rib plates connected with the third flange and the fourth flange are arranged on the outer wall of the water outlet section, and the number of the first rib plates is as same as that of the second rib plates and is an even number larger than or equal to four.

Description

A kind of containment spray pump

Technical field

The present invention relates to a kind of containment spray pump that is used for nuclear power equipment field in nuclear power equipment field.

Background technique

Pressurized-water reactor nuclear power plant is the principal mode of present nuclear power station, and water is at the reactor core inner ebullition of pressurized water reactor, so water must keep high pressure conditions, comprises nuclear steam supply system, safety shower system and auxiliary system in this nuclear island.

Wherein containment spray system by two independently pipeline form.Every pipe-line system all is made up of equipment such as spray pump, cooler, shower nozzle, material-changing water tank, valves.Containment spray pump is to stop from the fission product of fuel and last one barrier of a loop radioactive material entering environment.When security incident took place, the water of HTHP flow in the containment in the loop, cause the temperature and pressure in the containment to raise, and containment spray pump spray cold water was that the water vapor condensation in the containment becomes water.Reduce the pressure and temperature in the containment.Contain boric acid in the spraying water simultaneously, to remove airborne radioiodine element.

In order to guarantee effective processing of reactor fault, containment spray pump must keep certain natural frequency of vibration when operation.The proposed standard of this natural frequency of vibration is for being not less than 33Hz, and the natural frequency of vibration of containment spray pump generally has only 22-28Hz at present, can't guarantee effective processing of reactor accident.The natural frequency of vibration of containment spray pump and containment spray pump inner barrel structurally associated.

When said nuclear power plant system safe operation, the effect of said containment spray pump is; The water that changes in the nuclear power plant system in the water tank is injected in the containment, keep the balance of containment external and internal pressure, therefore when said nuclear power plant system normally moved, said containment spray pump can be called the low pressure safety injection pump again.

Summary of the invention

The objective of the invention is provides a kind of containment spray pump in order to overcome the deficiency of existing technology, and its natural frequency of vibration can satisfy the minimum requirements of nuclear power plant system for the natural frequency of vibration of containment spray pump, guarantees effective processing of reactor accident.

A kind of technological scheme that realizes above-mentioned purpose is: a kind of containment spray pump comprises inner barrel, outer cylinder body, pump seat, pump shaft and bearing support;

Inlet porting flange, outlet(discharge) flange, outward flange, inner flange and the last mounting hole that is positioned at the top of said pump seat on the said pump seat; Said inlet flange is communicated with said outward flange, and said inner flange is communicated with said outlet(discharge) flange; Said outward flange is fixed on the said outer cylinder body; Said inner flange is fixed on the said inner barrel, and said pump shaft runs through said bearing support, and stretches into said pump seat from the said mounting hole of going up, and runs through whole said inner barrel from top to bottom;

Said inner barrel comprises diversion section, water exit end, blower inlet casing section, suction casing and the suction pipe that connects successively from top to bottom, and wherein said blower inlet casing section is connected in series by the multilevel deflector shell;

The impeller that the said pump shaft in the multistage edge of socket axially is arranged in order on the said pump shaft, the position of the said blower inlet casing at different levels on said impeller at different levels and the said blower inlet casing section is one to one;

The two ends up and down of the outer wall of said diversion section are provided with first flange and second flange respectively; The two ends up and down of the outer wall of said water exit end are provided with the 3rd flange and the 4th flange respectively; Inner flange on the said pump seat connects said first flange, and said second flange connects said the 3rd flange;

First gusset that connects said first flange and said second flange is set on the outer wall of said diversion section; Second gusset that connects said the 3rd flange and the 4th flange is set on the outer wall of said water exit end; Said first gusset is identical with the quantity of said second gusset, and is the even number more than or equal to four.

Further; Inside at said inner barrel; Be provided with around the inner circumference of said water exit end and arrange the 3rd gusset, on said pump seat, be provided with around said pump seat circumferential arrangement; And connecting the 4th gusset of said inner flange and said outward flange, the quantity of said first gusset, said second gusset, said the 3rd gusset and said the 4th gusset is identical.

Further, socket first water pilot bearing and second water pilot bearing on the said pump shaft; Wherein said first water pilot bearing said pump shaft and said water exit end radially between, said second water pilot bearing said pump shaft and said suction pipe radially between.

Further again; Said first water pilot bearing and second water pilot bearing are hydrostatic bearing; Said first water pilot bearing and the said second water pilot bearing integral body are all processed by Z2CN18-10 type stainless steel, all scribble the coating that N scribbles nickel-base alloy or high-abrasive material on the inwall of said first water pilot bearing and second water pilot bearing.

Further again, in said inner barrel, the top of said water exit end is provided with fixed base; Sand table is got rid of in socket on the said pump shaft, and the said sand table that gets rid of is positioned at said fixed base top, and the end face of said fixed base and said gets rid of between the bottom surface of sand table and forms drainage channel.

Further, also be socketed with inducer on the said pump shaft, said inducer is between first stage impeller and said second water pilot bearing, between first stage impeller and said inducer, and socket axle sleeve on the pump shaft between said water pilot bearing and the said inducer.

Further again, said inducer comprises the wheel hub that is socketed on the said pump shaft and is arranged at the taper outer rim on the said wheel hub.

Further; Between the mounting hole mechanical seal structure is being set on said pump shaft and the said pump seat; Said mechanical seal structure comprises: be socketed in the nockbush on the said upward mounting hole inwall and be socketed in the sealing axle sleeve on the said pump shaft outer wall; On the outer wall of said sealing axle sleeve spiral seal is set, forms the seal face of said mechanical seal structure between said spiral seal and the said nockbush.

Further again, between said bearing support and the said mechanical seal structure thrust-bearing is set.

Further, the bottom of said pump shaft is provided with spindle nose.

Adopted the technological scheme of a kind of containment spray pump of the present invention; Said inner barrel; Comprise the diversion section, water exit end, blower inlet casing section, suction casing and the suction pipe that connect successively from top to bottom; First gusset that connects first flange and second flange is set on the outer wall of said diversion section, the technological scheme of second gusset that connects said the 3rd flange and the 4th flange is set on the said water exit end outer wall.Its technique effect is: the natural frequency of vibration of containment spray pump is brought up to more than the 33Hz from 22～28Hz, has satisfied the minimum requirements of nuclear power system to the containment spray pump natural frequency of vibration.

Description of drawings

Fig. 1 is the overall structure schematic representation of a kind of containment spray pump of the present invention.

Fig. 2 is the enlarged diagram of the A part of Fig. 1.

Fig. 3 is the enlarged diagram of the B part of Fig. 1.

Fig. 4 is the enlarged diagram of the C part of Fig. 1.

Fig. 5 is the first water pilot bearing structural representation of a kind of containment spray pump of the present invention.

Fig. 6 is the second water pilot bearing structural representation of a kind of containment spray pump of the present invention.

Fig. 7 is the structural representation of the inducer of a kind of containment spray pump of the present invention.

Embodiment

See also Fig. 1 to Fig. 7,, pass through embodiment particularly below, and combine accompanying drawing at length to explain in order to understand technological scheme of the present invention better:

See also Fig. 1,, pass through embodiment particularly below, and combine accompanying drawing at length to explain in order to understand technological scheme of the present invention better:

See also Fig. 1, a kind of containment spray pump of the present invention comprises: inner barrel 1, outer cylinder body 2, pump seat 3, pump shaft 4 and bearing support 5;

Inlet porting flange 31, outlet(discharge) flange 32, outward flange 33, inner flange 34 and the last mounting hole 35 that is positioned at the top of said pump seat 3 on the said pump seat 3; Said inlet flange 31 is communicated with said outward flange 33, and said inner flange 32 is communicated with said outlet(discharge) flange 34.

In the present embodiment, the angle between said inlet flange 31 and the said outlet(discharge) flange 32 is 90 degree.

The top of said outer cylinder body 2 is provided with upper flange 21, and said outward flange 33 is fixed with said upper flange 21 through bolt, and said urceolus 2 and said pump seat 3 are fixed.

Said inner barrel 1 comprises diversion section 11, water exit end 12, blower inlet casing section 13 and suction casing 14 and the suction pipe 15 that connects successively from top to bottom, and wherein said blower inlet casing section 13 is in series by the multilevel deflector shell.In the present embodiment, said blower inlet casing section 13 preferably is connected in series by three grades of blower inlet casings.A plurality of Taper Pipes 151 are set on the said suction pipe 15

The shape of the axial section of said diversion section 11, water exit end 12 outer walls is " worker " font; The two ends up and down that are said diversion section 11 outer walls are provided with first flange and second flange respectively; The two ends up and down of said water exit end 12 outer walls are provided with the 3rd flange and the 4th flange respectively; Inner flange 34 on the said pump seat 3 is through on said first flange that is bolted to said diversion section 11, and said second flange on the said diversion section 11 is through on said the 3rd flange that is bolted to said water exit end 12.Said like this pump seat 3 is just fixing with said inner barrel 1.

The top of said blower inlet casing section 13 is fixed with the bottom of said water exit end 12 through screw, and the bottom of said blower inlet casing section 13 is through the roof anchorage of screw and said suction casing 14.The top of said suction casing 14 outer walls is provided with the 5th flange, and said the 4th flange of said water exit end 12 is fixed through rod 16 and said the 5th flange on the said suction casing 14.

Fix through return pipe 17 on said the 4th flange on the said water exit end 12, said the 5th flange of said suction casing 14 and between the said suction pipe 15.On the joint of said return pipe 17 and said the 5th flange return pipe support 18 is set.

Like this, said diversion section 11, said water exit end 12, said blower inlet casing section 13, said suction casing 14 and said suction pipe 15 are connected as a single entity.Formed inner barrel 1.The effect of said rod 16 and said return pipe 17 is the rigidity that strengthen said inner barrel 1.

The greatest improvement of a kind of containment spray pump of the present invention is the improvement of said inner barrel 1 structure, promptly on the outer wall of said diversion section 11, along the circumference of said diversion section 11 outer walls, first gusset 111 that connects said first flange and said second flange is set; On the outer wall of said water exit end 12; Circumference along said water exit end 12 outer walls; Second gusset 121 that connects said the 3rd flange and said the 4th flange is set, and said first gusset 111 is identical with the quantity of said second gusset 121, and is the even number more than or equal to four.In the present embodiment, the quantity of said first gusset 111 and said second gusset 121 is eight.

The purpose that said first gusset 111 and said second gusset 121 are set is: the natural frequency of vibration that effectively improves said containment spray pump; Through measuring and calculating; The natural frequency of vibration of improving the said containment spray pump in back has like this reached more than the 33Hz; 22～28Hz than original is significantly improved, and satisfies the minimum requirements of nuclear power plant system to the said containment spray pump natural frequency of vibration.Said first gusset 111 is many more with said second gusset, 121 quantity, helps improving the natural frequency of vibration of said containment spray pump more, but can improve the difficulty that its foundry goods is made.

In addition; Inside at said inner barrel 1; Be provided with around the inner circumference of said water exit end 12 and arrange the 3rd gusset 122, on said pump seat 3, be provided with around said pump seat 3 circumferential arrangement; And connecting the 4th gusset 36 of said inner flange 34 and said outward flange 33, the quantity of said first gusset 111, said second gusset 121, said the 3rd gusset 122 and said the 4th gusset 36 is identical.

The effect that said the 3rd gusset 122 and said the 4th gusset 36 are set is: the natural frequency of vibration that further improves said containment spray pump is to more than the 35Hz.

Then, the technical measures of also having taked to increase said inner flange 34 spiral shell heart distances in the present embodiment improve the natural frequency of vibration of said containment spray pump.The spiral shell heart distance of inner flange described in the existing technology 34 is 580mm, and the spiral shell heart of inner flange described in the present embodiment 34 distance is 630mm.Correspondingly, the spiral shell heart of said first flange, said second flange, said the 3rd flange and said the 4th flange is apart from the also corresponding 630mm that increases to.Meanwhile, the spiral shell heart of said outward flange 33 still is 1000m apart from remaining unchanged, and the spiral shell heart of said upper flange 21 is apart from remaining unchanged.

Said bearing support 5 is arranged at the top of said containment spray pump; After said pump shaft 4 passes said bearing support 5 from top to bottom; Last mounting hole 35 from said pump seat 3 stretches into said containment spray pump, stretches into said inner barrel 1 from said first flange again, and runs through whole inner barrel 1.Make socket on said suction pipe 15 and the said pump shaft 4.

Be socketed with the impeller 41 that the said pump shaft 4 in multistage edge axially is arranged in order on the said pump shaft 4, the progression of blower inlet casing is identical on the progression of said impeller 41 and the said blower inlet casing section 13, also is three grades.And said impeller 41 the position of said pump shaft 4 on axially also be with said blower inlet casing section 13 on the position of blower inlet casing at different levels the time one to one.In the present embodiment, the impeller 41 of three grades of said pump shaft 4 axially-aligned in edge is respectively first stage impeller, sencond stage impeller and impeller from bottom to up.

In the present embodiment, what said impeller 41 adopted is centrifugal single-stage impeller, seal ring 411, increasing back sealing ring 412 and equalizing orifice 413 before being provided with between the blower inlet casing of correspondence with it on said impeller 41 and the said blower inlet casing section 13.

The purpose of design is like this: the axial force that can the said pump shaft 4 of balance receives.

The outer surface axial cross section of the blower inlet casings at different levels on said impeller 41 and the said blower inlet casing section 13 be shaped as arc.The purpose of design is to increase the conveyance capacity of containment spray pump like this.

Also be socketed with first water pilot bearing, 42, the second water pilot bearings 43 and inducer 44 on the said pump shaft 4 respectively.

Said first water pilot bearing 42 said pump shaft 4 and said water exit end 12 radially between, said second water pilot bearing 43 said pump shaft 4 and said suction pipe 15 radially between.

The effect of said first water pilot bearing 42 and said second water pilot bearing 43 is: support said pump shaft 4, stablize the rotating center of said pump shaft 4.

The integral body of said first water pilot bearing 42 and said second water pilot bearing 43 is all processed by Z2CN18-10 type stainless steel, and this stainless steel is exclusively used in the nuclear power field.The inwall of said first water pilot bearing 42 and said second water pilot bearing 43 is provided with the coating of nickel-base alloy or high-abrasive material, preferred Ni60 built-up welding coating in the present embodiment.The reason of design is like this: Ni60 is the nickel chromium triangle borosilicate alloy of high hardness; Have wear-resisting; Characteristics such as corrosion-resistant, high temperature resistant; Can satisfy under the conditions such as startup and parking transient state, cold water operation, hot water operation, hot transient state, small flow, impure water running the requirement that said first water pilot bearing 42 and said second water pilot bearing 43 do not wear and tear.

As shown in Figure 5; Said first water pilot bearing 42 has five pod apertures that are uniformly distributed with 421; Said pod apertures 421 all is communicated to the H shape groove 422 on said first water pilot bearing, 42 inwalls, in addition, also is provided with the axial diversion hole 423 that connects each other with said pod apertures 421 on said first water pilot bearing 42.As shown in Figure 6, said second water pilot bearing 43 has five pod apertures that are uniformly distributed with 431, and said pod apertures 431 all is communicated to the H shape groove 432 on said second water pilot bearing, 43 inwalls.

The purpose of design is like this: utilize lubricant medium pressure to make said first water pilot bearing 42 become hydrostatic bearing with said second water pilot bearing 43, guarantee said pump shaft 4 stablizing at rotating center.Through this particular design, improve the bearing capacity of said first water pilot bearing 42 and said second water pilot bearing 43, guarantee the performability of containment spray pump.

The base of said first water pilot bearing 42 is provided with four bolts hole, is used for said first water pilot bearing 42 is fixed with the bottom of said water exit end 12.The base of said second water pilot bearing 43 is provided with four bolts hole, is used for said second water pilot bearing 43 is fixed with the diapire of said suction pipe 15.

Said inducer 44 between said first stage impeller and said second water pilot bearing 43, between said inducer 44 and the said first stage impeller, and between said inducer 44 and said second water pilot bearing 43, socket axle sleeve 46 on the said pump shaft 4.Reduced the axial length of said inducer 44 like this, the difficulty of processing of said inducer 4 reduces greatly.

In the containment spray pump; The effect of said inducer 44 is: improve medium that containment spray pump transmitted suffered pressure through said first stage impeller the time; Guarantee the installation requirement of containment spray pump in nuclear power station, satisfy the requirement that cavitation does not take place this containment spray pump simultaneously under full performance operating mode.

Said inducer 44 comprises columniform wheel hub 441 and the last conical taper outer rim 442 that is arranged at wheel hub 41.Said wheel hub 441 is socketed on the said pump shaft 4, and such design can increase the conveyance capacity of containment spray pump, thereby improves the anti-cavitation performance of said inducer 44 itself.Said taper outer rim 442 is to be surrounded by two parallel spiral vanes.The inlet side sweepback cavetto of these two said spiral vanes, thus the anti-cavitation performance of inducer further improved, thus improved the anti-cavitation condition of the outer rim inlet that cavitation takes place the most easily.Even be positioned at the outer rim import generation initial cavitation of said inducer 44 bottoms, the steam bubble in the transmission medium is compressed, so that condenses, be difficult for expansion, thereby satisfy needs mercury vapour erosion performance.

Among the present invention, process said inducer and replace original forging in addition by foundry goods; And owing to be provided with said axle sleeve 46 on the pump shaft 100 at said inducer 44 two ends, therefore the length of the wheel hub 441 of said inducer changes present 302mm into by original 435mm.Thereby only need use general lathe just can process inducer used in the present embodiment 44.And said spiral vane is in the surface roughness through also obtaining after polishing to adopt the five-shaft numerical control machining center the same.

Said first water pilot bearing 42 is through communicating with the impeller outlet of said impeller with the equalizing orifice of said impeller; Said second water pilot bearing 43 before the said inducer 44 communicates with the outer rim import of the inducer of said inducer 44, has just formed certain pressure reduction between said like this first water pilot bearing 42 and said second water pilot bearing 43.Containment spray pump just can adopt the said medium that send of containment spray pump that said first water pilot bearing 42 is lubricated with said second water pilot bearing 43.

Although the structure of first water pilot bearing 42, said second water pilot bearing 43 and said inducer 44 has all been made significant improvement described in the present invention.Yet said first water pilot bearing 42, said impeller 41, said inducer 44 and the Placement of said second water pilot bearing 43 on said pump shaft 4, and the structure of said impeller 41 still belongs to existing technology.

See also Fig. 4, the bottom of said pump shaft 4 is on the said pump shaft 4 of promptly said second water pilot bearing 43 belows; Spindle nose 47 is set; Three dish springs 471 and locking nut 472 are set on the said spindle nose 47, and wherein said dish reed 471 can not only effectively be locked said pump shaft 4, can also be when the thermal shock operating mode; Eliminate each part of socket on the said pump shaft 4 because the dimensional changes that thermal expansion produces waits dangerous situation and cause locking inefficacy.

Because the medium that containment spray pump transmitted is the solution of radiating medium, contains the particle of a large amount of radiating mediums in the transmission medium.These particle grain size could be lubricated with said second water pilot bearing 43 said first water pilot bearing 42 after these particles must filter about 2.1mm.

See also Fig. 2; In said inner barrel 1; The top of said water exit end 12 is provided with fixed base 123, leaves the gap between said fixed base 123 and the said pump shaft 4, to let the medium that containment spray pump was transmitted that said first water pilot bearing 42 is lubricated with said second water pilot bearing 43.Also fix one on the said pump shaft 4 and got rid of sand table 45, saidly got rid of the top that sand table 45 is positioned at said fixed base 123, formed drainage channel 40 between said bottom surface of getting rid of sand table 45 and the said fixed base 123.

The purpose of design is like this: the said sand table 45 that gets rid of rotates with said pump shaft 4; Impurity particle greater than said drainage channel 40 diameters can't get in the said drainage channel 40; And after getting into said drainage channel 40 less than the impurity of said drainage channel 40 diameters; Can be along with the said sand table 45 that gets rid of rotates together; These impurity are thrown out of under centrifugal action, so can not cause said drainage channel 40 blocked, and said first water pilot bearing 42 can not lose efficacy because of lack of water with said second water pilot bearing 43 yet.

Owing to be provided with a boss on said fixed base 123 end faces, and said bottom surface of getting rid of sand table 45 is provided with groove, therefore said drainage channel 40 forms the mazy type drainage channel, helps to promote the filtering effect of said drainage channel 40 like this.

See also Fig. 3, also be provided with mechanical seal structure 6 between the last mounting hole 35 of said pump shaft 4 and said pump seat 3.This mechanical seal structure 6 belongs to from the flushing type mechanical seal structure.Comprise that being socketed in the said of said pump seat 3 goes up the nockbush 61 on mounting hole 35 inwalls and be socketed in the sealing axle sleeve 62 on said pump shaft 4 outer walls, socket each other between said nockbush 61 and the said sealing axle sleeve 62; Screw machine sealing 63 is set on the outer wall of said sealing axle sleeve 62.Form the seal face of said mechanical seal structure 6 between the inwall of said screw machine sealing 63 and said nockbush 61.

The purpose of design is like this: the flushing medium that the seal face of said mechanical seal structure 6 is washed must pass through the effect of cyclone hydraulic separators, could get into the seal face of said mechanical seal structure 6, and said seal face is washed.Because said cyclone hydraulic separators can be removed the impurity particle in the flushing medium, cause said mechanical seal structure to lose efficacy like this with regard to having prevented the impurity particle in the flushing medium from getting into the seal face of said mechanical seal structure.From said outlet(discharge) flange 32 diversions to cyclone hydraulic separators; Cyclone hydraulic separators with the particle removal in the medium after; The medium of removing impurity is introduced said mechanical seal structure 6, wash said seal face, the impurity of cyclone hydraulic separators filtering is arranged and is got into said inlet flange 31.Said cyclone hydraulic separators is the external device of said containment spray pump, does not belong to the part of said containment spray pump.

On said mechanical seal structure 6, the top of said sealing axle sleeve 61, also on said pump shaft 4 socket step-down ring 64.The effect of said step-down ring 64 is: when said mechanical seal structure loses efficacy, can effectively limit the leakage rate of flushing medium, and not influence the continuation operation of containment spray pump.

Between said bearing support 5 and said mechanical seal structure 6, go back socket thrust-bearing 50 on the said pump shaft 4, said thrust-bearing 50 is an angular contact ball bearing.Its effect is: the said equalizing orifice 413 on the said impeller 41 is the axial force that receives of the said pump shaft 4 of balance together.Connect said pump shaft 4 and said bearing support 5 simultaneously.

A kind of containment spray pump upper bearing (metal) body 5 of the present invention comprises: bearing support 51 and the bearing 52 and lubricating cup 53 that are arranged in the said bearing support 51.Here the bearing 52 that is adopted is Biserial cylindrical roller bearing.Said bearing 52 has improved two specifications than originally, and therefore said bearing 52 can bear bigger load, and heating value reduces.On the one hand on the said bearing support 51 the heat radiation gusset is set in addition, the total surface area of said heat radiation gusset increases to present 600 square centimeters by original 310 square centimeters.Thereby improved the safety reliability of said bearing part 5.

In the inside of said inner barrel 1, between the increasing back sealing ring and said water exit end 12 of said impeller, spacer 19 is set, be used for strengthening the rigidity of said inner barrel 1, and stablize the rotating center of said pump shaft 4.

Said first water pilot bearing 42 and said pump shaft 4 radially between, said second water pilot bearing 43 and said pump shaft 4 radially between, the bearing axle sleeve is set; Between said impeller 41 and the said pump shaft 4 impeller sleeve is set, said axle sleeve 46, said sealing axle sleeve 62, said bearing axle sleeve, said impeller sleeve and said inducer 44 are all through key and 4 sockets of said pump shaft.Said axle sleeve 46; The seal clearance of said sealing axle sleeve 62, said bearing axle sleeve and said impeller sleeve and said pump shaft 4 cooperation places is much larger than the distortion of accident conditions rotor part and mating parts; Guarantee on the pump shaft 4 each parts during the SSE great earthquake of earthquake intensity (the nuclear power station location set a record) and after with said inner barrel 1, said pump seat 3 and said bearing support 5 on each parts can not rub the safe operation property of assurance containment spray pump with said pump shaft 4.

The top of said pump shaft 4 is provided with coupling 48, is used for connecting motor.

In addition, fastening pieces such as employed all bolts, double-screw bolt all adopt locked spacer locking on a kind of containment spray pump among the present invention.Guaranteed under any operating mode the inefficacy that can not relax of the connection between each parts of containment spray pump because of vibration.

The transmission medium of containment spray pump flows into said containment spray pump from said inlet flange 31; Be full of the outer chamber between said inner barrel 1 and the said outer cylinder body 2; Transmission medium in the said outer chamber, the said suction pipe 15 through said inner barrel 1 bottom gets into said inner barrel 1, under the effect of said inducer 44 and multistage said impeller 41; Along rising in the said inner barrel 1, finally discharge said containment spray pump from said outlet(discharge) flange 32.To said pump shaft 4 and said first water pilot bearing 42, be lubricated between said pump shaft 4 and said second water pilot bearing 43 simultaneously.

Those of ordinary skill in the art will be appreciated that; Above embodiment is used for explaining the present invention; And be not to be used as qualification of the present invention; As long as in connotation scope of the present invention, all will drop in claims scope of the present invention the above embodiment's variation, modification.

Claims

1. a containment spray pump comprises inner barrel (1), outer cylinder body (2), pump seat (3), pump shaft (4) and bearing support (5);

Inlet porting flange (31), outlet(discharge) flange (32), outward flange (33), inner flange (34) and the last mounting hole (35) that is positioned at the top of said pump seat (3) on the said pump seat; Said inlet flange (31) is communicated with said outward flange (33), and said inner flange (34) is communicated with said outlet(discharge) flange (32); Said outward flange (33) is fixed on the said outer cylinder body (2); Said inner flange (34) is fixed on the said inner barrel (1), and said pump shaft (4) runs through said bearing support (5), and stretches into said pump seat (3) from the said mounting hole (35) of going up, and runs through whole said inner barrel (1) from top to bottom; It is characterized in that:

Said inner barrel (1) comprises diversion section (11), water exit end (12), blower inlet casing section (13), suction casing (14) and the suction pipe (15) that connects successively from top to bottom, and wherein said blower inlet casing section (14) is connected in series by the multilevel deflector shell;

Said pump shaft (4) is gone up the axial arrangement impeller (41) successively of the said pump shaft in the multistage edge of socket (4), and the position of the said blower inlet casing at different levels on said impeller (41) at different levels and the said blower inlet casing section (13) is one to one;

The two ends up and down of the outer wall of said diversion section (11) are provided with first flange and second flange respectively; The two ends up and down of the outer wall of said water exit end (12) are provided with the 3rd flange and the 4th flange respectively; Inner flange (34) on the said pump seat (3) connects said first flange, and said second flange connects said the 3rd flange;

First gusset (111) that connects said first flange and said second flange is set on the outer wall of said diversion section (11); Second gusset (121) that connects said the 3rd flange and the 4th flange is set on the outer wall of said water exit end (12); Said first gusset (111) is identical with the quantity of said second gusset (121), and is the even number more than or equal to four.

2. a kind of containment spray pump according to claim 1; It is characterized in that: inside in said inner barrel (1); Be provided with around the inner circumference of said water exit end (12) and arrange the 3rd gusset (122); On said pump seat (3); Be provided with around said pump seat (3) circumferential arrangement, and connect the 4th gusset (36) of said inner flange (34) and said outward flange (33), said first gusset (111), said second gusset (121), said the 3rd gusset (122) and the quantity of said the 4th gusset (36) are identical.

3. a kind of containment spray pump according to claim 1 and 2 is characterized in that: said pump shaft (4) is gone up socket first water pilot bearing (42) and second water pilot bearing (43); Wherein said first water pilot bearing (42) be positioned at said pump shaft (4) and said water exit end (11) radially between, said second water pilot bearing (43) be positioned at said pump shaft (4) and said suction pipe (15) radially between.

4. a kind of containment spray pump according to claim 3; It is characterized in that: said first water pilot bearing (42) and said second water pilot bearing (43) are hydrostatic bearing; Said first water pilot bearing (42) and second water pilot bearing (43) are whole all to be processed by Z2CN18-10 type stainless steel, all scribbles the coating of nickel-base alloy or high-abrasive material on the inwall of said first water pilot bearing (42) and second water pilot bearing (43).

5. according to the said a kind of containment spray pump of claim 3, it is characterized in that: in said inner barrel (1), the top of said water exit end (12) is provided with fixed base (123); Said pump shaft (4) is gone up socket and is got rid of sand table (45), and the said sand table (45) that gets rid of is positioned at said fixed base (123) top, and the end face of said fixed base (123) and said gets rid of between the bottom surface of sand table (45) and forms drainage channel (40).

6. a kind of containment spray pump according to claim 1 and 2; It is characterized in that: also be socketed with inducer (44) on the said pump shaft (4); Said inducer (44) is positioned between first stage impeller and said second water pilot bearing (43); Between said first stage impeller and said inducer (44), and the pump shaft (4) between said water pilot bearing (43) and the said inducer (44) is gone up socket axle sleeve (46).

7. a kind of containment spray pump according to claim 6 is characterized in that: said inducer (44) comprises the wheel hub (441) that is socketed on the said pump shaft (4) and is arranged at the taper outer rim (442) on the said wheel hub (441).

8. a kind of containment spray pump according to claim 1 and 2; It is characterized in that: between the last mounting hole (35) of said pump shaft (4) and said pump seat (3), mechanical seal structure (6) is set; Said mechanical seal structure (6) comprising: be socketed in the nockbush (61) on said upward mounting hole (35) inwall and be socketed in the sealing axle sleeve (62) on said pump shaft (4) outer wall; Spiral seal (63) is set on the outer wall of said sealing axle sleeve (62), forms the seal face of said mechanical seal structure (6) between said spiral seal (63) and the said nockbush (61).

9. a kind of containment spray pump according to claim 8, its characteristic can be: between said bearing support (5) and the said mechanical seal structure (6) thrust-bearing (50) is set.

10. a kind of containment spray pump according to claim 8, its characteristic can be: the bottom of said pump shaft (4) is provided with spindle nose (47).