CN208935021U - A kind of main pump pump shell structure with anti-backflow function - Google Patents
A kind of main pump pump shell structure with anti-backflow function Download PDFInfo
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- CN208935021U CN208935021U CN201821548455.7U CN201821548455U CN208935021U CN 208935021 U CN208935021 U CN 208935021U CN 201821548455 U CN201821548455 U CN 201821548455U CN 208935021 U CN208935021 U CN 208935021U
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- check valve
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Abstract
The utility model discloses a kind of main pump pump shell structures with anti-backflow function, comprising: pump case ontology, pump case ontology include: straight section and the L-type section that is connected on straight section, and straight section and L-type section are to forge respectively；Tube body；And check valve module；Ring cavity between the outside and pump case ontology of tube body forms the first runner for being used for pumped (conveying) medium, the inside of tube body and the inner cavity of check valve module form the second flow channel for being used for pumped (conveying) medium, second flow channel is connected with first runner, wherein: the medium conveyed is sucked by first runner, is discharged through second flow channel.The main pump pump shell structure with anti-backflow function for implementing the utility model, can reduce pipe arrangement, the risk of LOCA accident is effectively reduced, improve the safety of reactor；Structurally reasonable, it is convenient to assemble, and for ease of maintenaince and safeguards.
Description
Technical field
The utility model relates to nuclear power field more particularly to a kind of main pump pump shell structures with anti-backflow function.
Background technique
In the prior art, nuclear reactor coolant pump (referred to as " main pump ") is the driving equipment of primary Ioops, and main function is
The flowing of primary Ioops coolant is driven, reliable operating is the important leverage that nuclear power station is continuously safely operated.
The pump case of existing nuclear reactor coolant pump generallys use volute type structure, can be to conveying under the action of impeller
Medium is sucked and is discharged operation.Wherein: flow outlets and circulation entrance are respectively provided with corresponding pipeline and constitute holding for primary Ioops
Flanging circle.
The structure is: pipeline occupied space is big, can not form compact arrangement, and pipeline breaking is made
At LOCA(coolant loss of-coolant accident (LOCA)), the risk of accident is larger.In addition, having inlet and outlet runner pump knot disclosed in the prior art
In the other embodiment of structure, the corresponding flow passage structure that usually only design impeller is constituted to guide vane can't pass in and out pump case
The structure of mouth is designed.Meanwhile the structure design of pump case inlet and outlet is one of the important factor in order of pump shell structure compactedness.
Utility model content
Technical problem to be solved by the utility model is to provide a kind of main pump pump case knot with anti-backflow function
Structure can reduce pipe arrangement, and the risk of LOCA accident is effectively reduced, and improve the safety of reactor；It is structurally reasonable, assembly
It is convenient, for ease of maintenaince and safeguard.
In order to solve the above-mentioned technical problem, the embodiments of the present invention provide a kind of main pump with anti-backflow function
Pump shell structure, comprising: the pump case ontology that can be connected with reactor pressure vessel, pump case ontology include: straight section and in succession straight
L-type section in section, straight section and L-type section are to forge respectively；It is installed in the tube body of pump case body interior；And it is installed in pump case ontology
Inside, be connected with the one end of tube body to the check valve module that prevents conveyed medium from flowing backwards；Outside tube body
Ring cavity between portion and pump case ontology forms the first runner for being used for pumped (conveying) medium, the inside of tube body and the inner cavity of check valve module
The second flow channel for being used for pumped (conveying) medium is formed, second flow channel is connected with first runner, in which: the medium conveyed is by first-class
Road sucking, is discharged through second flow channel.
Wherein, check valve module includes: check valve body；It is installed in capable of centainly rotating for check valve body
The non-return valve rotated in angular range and the first support to be fastened on check valve body in pump case inner body wall
Block, the first supporting block are connected on the inner wall of pump case ontology.
Wherein, check valve body is the cavity body structure that both ends are equipped with opening, and one end opening is to assemble hydraulic part
The first bell socket, opposite another end opening be to connection pipe body second accept socket.
Wherein, the periphery of the first bell socket is convexly equipped with trunnion, and screw passes through trunnion and is connected in the first supporting block.
Wherein, the first supporting block is fastened on the inner wall of the straight section of pump case ontology.
Wherein, the first supporting block is fastened on the inner wall of L-type section of pump case ontology.
Wherein, pump case ontology and reactor pressure vessel use butt welding, and inlet and outlet are by casing connection, to reduce pipe
Road arrangement.
Wherein, the bottom of pump case ontology is equipped with slight slope, to realize that nature empties.
Main pump pump shell structure provided by the utility model with anti-backflow function, has the following beneficial effects:
The first, the ring cavity between the outside of tube body and pump case ontology forms the first runner for being used for pumped (conveying) medium, tube body
The internal inner cavity with check valve module forms the second flow channel for being used for pumped (conveying) medium, and second flow channel is connected with first runner,
In: the medium conveyed is sucked by first runner, is discharged through second flow channel, and the medium conveyed is that radial direction sucks, radial direction is discharged,
Structure characteristics of compact layout；Meanwhile pump case ontology and reactor pressure vessel use butt welding, inlet and outlet are reduced by casing connection
Pipe arrangement, is effectively reduced the risk of LOCA accident, improves the safety of reactor.
The second, the check valve module being connected with the one end of tube body is installed in the inside of pump case ontology, can prevent main pump institute
The medium of conveying is flow backwards, and has ensured the performance of main pump.
Third, structure flexible design are reasonable, securely and reliably, and for ease of maintenaince and maintenance.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of the utility model anti-backflow main pump pump case embodiment one.
Fig. 2 is the structural schematic diagram of the utility model anti-backflow main pump pump case embodiment two.
Fig. 3 is the structural schematic diagram of the utility model anti-backflow main pump pump case embodiment three.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
Every other embodiment obtained, fall within the protection scope of the utility model.
It is the embodiment one of the utility model anti-backflow main pump pump case referring to Fig. 1.
Nuclear reactor coolant pump (abbreviation main pump) in the present embodiment, includes at least: anti-backflow main pump pump case, anti-backflow
Main pump pump case is connected with reactor pressure vessel.
When it is implemented, anti-backflow main pump pump case includes: the pump case ontology 1 that can be connected with reactor pressure vessel, dress
The tube body 2 being located inside pump case ontology 1；And be installed in the inside of pump case ontology 1, be connected with the one end of tube body 2 to
The check valve module for preventing conveyed medium from flowing backwards；Ring cavity between the outside and pump case ontology 1 of tube body 2 is formed for conveying
The first runner A of medium, the inside of tube body 2 and the inner cavity of check valve module 3 form the second flow channel B for being used for pumped (conveying) medium, the
Two runner B are connected with first runner A, in which: the medium conveyed is sucked by first runner A, is discharged through second flow channel B.
When it is implemented, pump case ontology 1 is the hollow cavity structure that both ends are equipped with opening, and after assembly is fixed, one end
Opening be located at vertical direction, the opening of the other end is located at horizontal direction.Pump case ontology 1 includes: straight section 11 and in succession in straight section
L-type section 12 on 11.Straight section 11 and L-type section 12 in the present embodiment are solid forging, and effect is: can eliminate radial suction
The pressure-bearing weld seam in institute's pumped (conveying) medium primary Ioops enter, being radially discharged, improves the safety of main pump.
Further, tube body 2 is set as bend pipe in the present embodiment, in other embodiment, can also be set to other shapes
Shape meets radial sucking and radial direction discharge is compact as long as meeting the formation cannula structure of inside socket pipe body 2 in pump case ontology 1
Arragement construction.
The specific structure of bend pipe further explained below, bend pipe include: elbow body 21 and to elbow body 21 into
The fixed support ring 22 of row support.When it is implemented, elbow body 21 is the hollow cavity structure that both ends are equipped with opening, bend pipe dress
Behind the inside for fitting over pump case ontology 1, the opening of bend pipe one end is towards vertical direction, vertical direction after assembling with pump case main body 1
Open end is set as coaxially, and the opening of the bend pipe other end is towards horizontal direction, the open end of horizontal direction after assembling with pump case main body 1
It is set as coaxial, can so reinforce the radial effect sucked and be discharged.
Elbow body 21 is fitted by with pump case ontology 1 as flowering structure is implemented, and the bottom of elbow body 21 passes through
The second supporting block 4 and third supporting block 5 being connected on 1 inner wall of pump case ontology are fixed, and the top of elbow body 21 passes through
Support ring 22 is limited.
When it is implemented, the second supporting block 4 and third supporting block 5 are respectively in bulk, when assembly, the two passes through welding respectively
Mode be fixed on the inner wall of pump case ontology 1.The position of second supporting block 4 assembly is generally corresponding to the bending in elbow body 21
Fragment position primarily serves the effect supported vertically.It is threaded in second supporting block 4, screw is through elbow body 21
Corresponding position is simultaneously locked at the fastening that can be achieved in the threaded hole of the second supporting block 4 with the second supporting block 4.Third supporting block 5 fills
The position matched is generally corresponding to the position of 21 horizontal segment end of elbow body, and third supporting block 5 primarily serves the effect of Auxiliary support,
It can be set according to actual needs one or more.
One end of support ring 22 is fastened on the inner wall of pump case ontology 1, and the other end is held in 21 open end side of elbow body
Outer wall on.When it is implemented, the above-mentioned position limiting structure of support ring 22 can only pass through the open end side of fixed bending tube ontology 21
Realized, the junction that can also be connected by fixed bending tube ontology 21 with check valve module 3, that is, elbow body 21 with
The connected aperture position of check valve module 3 is realized which can enhance support ring 22 to bend pipe and check valve module 3
Support fastening effect.
Further, check valve module 3 includes: check valve body 31；Be installed in inside check valve body 31 can be
The non-return valve 32 rotated in certain rotation angle range；And check valve body 31 to be fastened in pump case ontology 1
The first supporting block 33 on wall, the first supporting block 33 are connected on the inner wall of pump case ontology 1, for example, by welding will
First supporting block 33 is connected on the inner wall of pump case ontology 1, is opened up in the first supporting block 33 for assembling check valve body 31
Threaded hole.When it is implemented, the first supporting block 33 can be two soil block cloddies being arranged symmetrically, it is also possible to a whole circle
Ring structure part.
In the present embodiment, check valve body 31 is the cavity body structure that both ends are equipped with opening, and one end opening is to assemble
First bell socket 311 of hydraulic part, opposite another end opening are to accept socket 312 to the second of connection pipe body 2.The
The periphery of one bell socket 311 is convexly equipped with trunnion 311a, and screw passes through trunnion 311a and is connected in what the first supporting block 33 was opened up
In threaded hole, to implement the fixation to 31 one end of check valve body.
First bell socket 311 is located at the top of check valve body 31, and the hydraulic part assembled can be the pump such as impeller
The component routinely applied in structure.Second undertaking socket 312 is located at the bottom of check valve body 31, and second accepts 312 energy of socket
It is enough to be docked with the open end side of elbow body 21, then fixed by 22 pairs of the two of support ring.
Anti-backflow main pump pump case is assembled as follows step and is assembled in the present embodiment, which embodies nuclear reaction
The structural compactness of the anti-backflow pump case of reactor coolant pump and convenient for safeguarding and maintenance and highly-safe structural advantage.
Firstly, welding the second supporting block 4 in the bottom of pump case ontology 1, while welding third supporting block 5 and difference on it
Process screw thread；And then, bend pipe 2 is installed, bend pipe 2 and the second supporting block 4 are connected by screw to, realizes fastening；
Then, support ring 22 is installed, and support ring 22 and bend pipe 2 are welded, while finishing bend pipe 2 and support ring
The mating surface of 22 connected bell sockets；
Further, the first supporting block 33, its mating surface of axially position, and thread mill drilling are welded；Non-return valve sheet is installed
Check valve body 31 and the first supporting block 33 are connected by screw to by body 31；It is fabricated out according to detailed programs applied
Hydraulic part, and hydraulic part is mounted on the first bell socket 311 of check valve body 31.
In the present embodiment anti-backflow main pump pump case in the specific implementation, the ring cavity between the outside and pump case ontology 1 of tube body 2
The first runner A for being used for pumped (conveying) medium is formed, the inside (can also be common with the inner cavity of check valve module 3) of tube body 2, which is formed, to be used
In the second flow channel B of pumped (conveying) medium, second flow channel B is connected with first runner A, in which: the medium conveyed is by first runner A
Sucking, is discharged through second flow channel B, in this way, simplifying structure on the basis of realizing anti-backflow function, makes structure arrangement more
It is compact, while also reducing the risk of LOCA accident caused by pipeline breaking.At the same time it can also pass through the first bell socket of change
The type of hydraulic part converts the inlet and outlet of sucking, discharge on 311.The medium conveyed is radial sucking, radial row
Mode out.
Preferably, pump case ontology 1 is attached by the way of butt welding with reactor pressure vessel.In addition, second
Road B and first runner A, that is, the knot that the radial inlet and outlet for sucking, being discharged are socket-connected by using pump case ontology 1 and tube body 2
Structure mode is implemented, and pipe arrangement can be so reduced, and realizes the structure construction of reactor compact Layout, while reducing LOCA accident
Risk.
Preferably, one section of 1 bottom of pump case ontology is equipped with slight slope 1a, to realize that nature empties, reduces because draining exists
Bottom opens up drainage hole, enhances the integral strength of pump case.
It referring to fig. 2, is the embodiment two of the utility model anti-backflow main pump pump case.
Main pump pump shell structure with anti-backflow function and the difference of above-described embodiment one in the present embodiment be, pump case
Ontology 1 includes: straight section 11 and the L-type section 12 on straight section 11 in succession.Wherein, straight section 11 and L-type section 12 are laggard to forge respectively
Luggage is matched, and the first supporting block 33 is fastened on the inner wall of L-type section 12 of pump case ontology 1, that is to say, that the segmentation of pump case ontology 1 is welded
It seams and sets on the first supporting block 33.The effect forged respectively is: forging difficulty of processing reduced, the utilization rate of material is improved,
The assembly method is conducive to control quality, reduces manufacturing cost.
It is the embodiment three of the utility model anti-backflow main pump pump case referring to Fig. 3.
Main pump pump shell structure with anti-backflow function and the difference of above-described embodiment two in the present embodiment be, first
Supporting block 33 is fastened on the inner wall of straight section 11 of pump case ontology 1, that is to say, that the segmentation weld seam of pump case ontology 1 is arranged first
Under supporting block 33.The effect forged respectively is: reducing forging difficulty of processing, improves the utilization rate of material, which has
Conducive to control quality, manufacturing cost is reduced.
The main pump pump shell structure with anti-backflow function for implementing the utility model, has the following beneficial effects:
The first, the ring cavity between the outside of tube body and pump case ontology forms the first runner for being used for pumped (conveying) medium, tube body
The internal inner cavity with check valve module forms the second flow channel for being used for pumped (conveying) medium, and second flow channel is connected with first runner,
In: the medium conveyed is sucked by first runner, is discharged through second flow channel, or the medium conveyed is sucked by second flow channel,
It is discharged through first runner, the medium conveyed is radial sucking, radial discharge, structure characteristics of compact layout；Meanwhile pump case ontology and anti-
Answer core pressure vessel using butt welding, inlet and outlet reduce pipe arrangement, the wind of LOCA accident is effectively reduced by casing connection
Danger, improves the safety of reactor.
The second, the check valve module being connected with the one end of tube body is installed in the inside of pump case ontology, and main pump can be prevented defeated
The medium sent is flow backwards, and has ensured the performance of main pump.
Third, pump case ontology are solid forging, can be eliminated in the radial institute's pumped (conveying) medium primary Ioops for sucking, being radially discharged
Pressure-bearing weld seam, improve the safety of main pump.
4th, structure flexible design is reasonable, securely and reliably, and for ease of maintenaince and maintenance.
Claims (8)
1. a kind of main pump pump shell structure with anti-backflow function characterized by comprising
The pump case ontology that can be connected with reactor pressure vessel, the pump case ontology include: straight section and are connected to the straight section
On L-type section, the straight section and the L-type section are to forge respectively；
It is installed in the tube body of the pump case body interior；And
Be installed in the inside of the pump case ontology, be connected with the one end of the tube body to prevent conveyed medium from flowing backwards
Check valve module；Ring cavity between the outside of the tube body and the pump case ontology is formed for the first-class of pumped (conveying) medium
The inner cavity of road, the inside of the tube body and the check valve module forms the second flow channel for being used for pumped (conveying) medium, the second
Road is connected with the first runner, in which:
The medium conveyed is sucked by the first runner, is discharged through the second flow channel.
2. as described in claim 1 with the main pump pump shell structure of anti-backflow function, which is characterized in that the check valve module
Include:
Check valve body；
It is installed in the non-return valve that can be rotated in certain rotation angle range of the check valve body；And
To the first supporting block being fastened on the check valve body in the pump case inner body wall, first supporting block is solid
It is connected on the inner wall of the pump case ontology.
3. as claimed in claim 2 with the main pump pump shell structure of anti-backflow function, which is characterized in that the check valve body
The cavity body structure of opening is equipped with for both ends, one end opening is the first bell socket to assemble hydraulic part, and opposite is another
The second undertaking socket open at one end for connection pipe body.
4. as claimed in claim 3 with the main pump pump shell structure of anti-backflow function, which is characterized in that first socket joint connects
The periphery of mouth is convexly equipped with trunnion, and screw passes through the trunnion and is connected in first supporting block.
5. as claimed in claim 2 with the main pump pump shell structure of anti-backflow function, which is characterized in that first supporting block
It is fastened on the inner wall of the straight section of the pump case ontology.
6. as claimed in claim 2 with the main pump pump shell structure of anti-backflow function, which is characterized in that first supporting block
It is fastened on the inner wall of the L-type section of the pump case ontology.
7. as described in claim 1 with anti-backflow function main pump pump shell structure, which is characterized in that the pump case ontology with
Reactor pressure vessel uses butt welding, and inlet and outlet are by casing connection, to reduce pipe arrangement.
8. as described in claim 1 with the main pump pump shell structure of anti-backflow function, which is characterized in that the pump case ontology
Bottom is equipped with slight slope, to realize that nature empties.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821548455.7U CN208935021U (en) | 2018-09-21 | 2018-09-21 | A kind of main pump pump shell structure with anti-backflow function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821548455.7U CN208935021U (en) | 2018-09-21 | 2018-09-21 | A kind of main pump pump shell structure with anti-backflow function |
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| Publication Number | Publication Date |
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| CN208935021U true CN208935021U (en) | 2019-06-04 |
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| CN201821548455.7U Active CN208935021U (en) | 2018-09-21 | 2018-09-21 | A kind of main pump pump shell structure with anti-backflow function |
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