CN217999960U - Impeller shielding cylinder of nuclear power shielding pump - Google Patents

Abstract

The utility model relates to a nuclear power station canned motor pump maintenance discloses an impeller shielding section of thick bamboo of nuclear power canned motor pump, include: two adapters; each semi-cylindrical shell comprises a connecting shell, a shielding shell and a fan-shaped sheet which are integrally arranged; the inner wall of the connecting shell is detachably connected with a connecting lug hinged with the adapter; the outer edge and the inner edge of the fan-shaped sheet are respectively connected with the end parts of the connecting shell and the shielding shell which are close to each other, and a plurality of second through holes are formed; the shielding shell is also integrally provided with extension pieces outwards along the concave edge of the shielding shell, and two ends of each extension piece are connected to two ends of each fan-shaped piece; the first sealing ring and the second sealing ring are respectively embedded in the fan-shaped pieces and the extending pieces of the two semi-cylindrical shells in a staggered manner; and the mounting ring is sleeved on the shielding shell and provided with a plurality of threaded holes matched with the first through hole and the second through hole, and the inner wall of the mounting ring is provided with two limiting grooves matched with the extending pieces.

Description

Impeller shielding cylinder of nuclear power shielding pump

Technical Field

The utility model relates to a nuclear power station canned motor pump maintenance, in particular to nuclear power canned motor pump's impeller shielding section of thick bamboo.

Background

After the canned motor pump in the nuclear power station is used for a long time, maintenance and repair are needed, and the operation stability of the canned motor pump is ensured. The canned motor pump generally connects the canned motor pump body and the pump body through a flange, and after the connection, the impeller on the outer side of the canned motor pump body is located in the pump body to work. After the flange connection is removed, the shield pump main body is lifted by the lifting appliance to be separated from the pump body, the impeller leaves the pump body and is directly exposed in the environment, and radioactive media can be remained in the impeller. At this time, the impeller needs to be shielded by the shielding cylinder, and the subsequent operation is performed. At present, a flange on a main body of the shield pump is generally matched, so that a shield cylinder is also provided with the flange, and after the shield cylinder is sleeved, the connection and the sealing between the shield cylinder and the main body of the shield pump are realized through a fastener. When the shielding cylinder is used, the impeller is required to be quickly shielded, hole positions of the flanges are required to be aligned, operation is inconvenient, and quick and efficient installation of the shielding cylinder is easily influenced.

SUMMERY OF THE UTILITY MODEL

The application provides an impeller shielding cylinder of nuclear power canned motor pump, can solve current shielding cylinder operation inconvenient, influence the problem of the quick, efficient installation of shielding cylinder easily.

In this application, provide an impeller shielding section of thick bamboo of nuclear power canned motor pump, include: the two adapter pieces are respectively used for being inserted and fixed in two opposite first through holes in a flange of the shield pump main body; each semi-cylindrical shell comprises a connecting shell, a shielding shell and a fan-shaped sheet which are integrally arranged; the inner diameter and the outer diameter of the connecting shell are larger, and the inner wall of the connecting shell is detachably connected with a connecting lug hinged with the adapter; the outer edge and the inner edge of the fan-shaped sheet are respectively connected with the end parts, close to each other, of the connecting shell and the shielding shell, and a plurality of second through holes matched with the first through holes are formed in the fan-shaped sheet; the inner diameter and the outer diameter of the shielding shell are smaller, extending pieces are integrally arranged outwards along the concave edges of the shielding shell, and two ends of each extending piece are connected to two ends of the fan-shaped piece; the first sealing ring and the second sealing ring are respectively embedded in the fan-shaped pieces and the extending pieces of the two semi-cylindrical shells in a staggered manner; the collar, two the half-cylinder shell rotates to supporting each other, covers under the state of shielding pump impeller, the collar cup joints in the shielding shell, its a plurality of screw holes that are provided with first through-hole of cooperation, second through-hole, its inner wall is provided with the cooperation extend two spacing grooves of piece.

In one embodiment, each of the adapters includes: the fixed part is used for being fixedly inserted into the first through hole, and after the fixed part and the first through hole are connected, the inserting column on the fixed part also exceeds the flange of the shielding pump main body; the moving part is axially and slidably connected to the fixed part along the pump of the shielding pump, and the connecting lug is hinged to the moving part; a spring disposed between the fixed portion and the moving portion to move the moving portion away from the fixed portion.

In one embodiment, the outer wall of the shielding shell is inclined, and the inner wall of the mounting ring is in a matched inclined state as the outer diameter of the shielding shell is larger and the outer diameter of the shielding shell is closer to the connecting shell; the outer side surfaces of the two vertical parts of the extending piece are in an inclined state, the thickness of the extending piece is thicker as the extending piece is closer to the connecting shell, and the two side walls of the limiting groove are also in a matched inclined state.

In one embodiment, when the mounting ring is sleeved on the shielding shells and abuts against the fan-shaped sheets, the limiting grooves abut against the extending parts of the two shielding shells to press the parts, corresponding to the extending sheets, of the first sealing ring and the second sealing ring.

In one embodiment, the clamp comprises a clamp strip, the clamp strip is provided with a clamp groove for clamping two horizontal parts of the extension pieces, two ends of the clamp strip exceed the horizontal parts of the extension pieces, and a third fastener is arranged.

To sum up, in this application, an impeller shield section of thick bamboo of nuclear power canned motor pump, with the split of shield section of thick bamboo two semi-cylindrical shells, the cooperation adaptor, before hoisting canned motor pump main part, just can be connected to canned motor pump main part with two semi-cylindrical shells earlier, accomplish the location of hole site, along with the canned motor pump main part is hoisted, two semi-cylindrical shells can follow and rotate, when the impeller exposes completely, can accomplish fast and shelter from, it is more convenient to have the operation, the beneficial effect of the installation of guarantee shield section of thick bamboo quick, efficient.

Drawings

In order to better and clearly illustrate the technical solutions in the embodiments or the background art of the present application, the drawings used in the embodiments or the background art of the present application will be described below.

FIG. 1 is a schematic view of the separation of two semi-cylindrical shells;

FIG. 2 is a schematic view of the initial fitting of two semi-cylindrical shells;

FIG. 3 is a schematic view of an arrangement of the adapter;

FIG. 4 is a schematic view of the adapter of FIG. 3 in use;

FIG. 5 is a schematic view of the preliminary limiting of the transfer piece to the two semi-cylindrical shells in FIG. 3;

FIG. 6 is a schematic view of a semi-cylindrical shell;

FIG. 7 is a schematic view of another semi-cylindrical shell;

FIG. 8 is a schematic view of the fitting of the mounting ring and the two semi-cylindrical shells;

fig. 9 is a schematic view of the mating of the snap strip, mounting ring and the two semi-cylindrical shells.

In the figure, 1, a canned pump main body; 11. a flange; 2. an impeller; 3. an adapter; 3-1, a fixed part; 3-1-1, side blocks; 3-1-2, bottom block; 3-1-21, inserting columns; 3-2, a moving part; 3-3, a spring; 4. a semi-cylindrical shell; 4-1, connecting the shell; 4-2, shielding shell; 4-21, extension pieces; 4-211, a concave embedded groove; 4-212, external concave embedded groove; 4-3, fanning strip; 4-31, a second through hole; 4-32, inner semicircle embedded groove; 4-33, an outer semicircle embedded groove; 5. a first seal ring; 6. a second seal ring; 7. a mounting ring; 71. a limiting groove; 711. a side wall; 72. a threaded hole; 8. connecting lugs; 9. clamping the strip; 91. a card slot; 10. and a third fastener.

Detailed Description

The following further description is made in conjunction with the description drawings.

The shield pump is characterized in that the shield pump body 1 is connected with the pump body through the flange 11, and after the shield pump body 1 is connected, the impeller 2 on the outer side of the shield pump body 1 is located in the pump body to work.

Referring to fig. 1, an impeller shielding cylinder of a nuclear power shielding pump includes two adapters 3, two semi-cylindrical shells 4, a first sealing ring 5, a second sealing ring 6, and a mounting ring 7.

The two adapters 3 are respectively used for being inserted and fixed into two first through holes in the flange 11 of the shield pump main body 1, and the two first through holes are opposite at an interval of 180 degrees. That is, when the canned motor pump main body 1 is disassembled, two pairs of opposite first fastening members are selected, and only the two pairs of first fastening members are disassembled to leave two required first through holes for inserting the two adapters 3.

Referring to fig. 1 and 2, each of the half cylindrical cases 4 includes a coupling case 4-1, a shield case 4-2, and a segment 4-3, which are integrally provided.

Compared with the shielding shell 4-2, the inner diameter and the outer diameter of the connecting shell 4-1 are larger, the inner wall of the connecting shell is detachably connected with the connecting lug 8, and in particular, the detachable connection can be completed through the second fastening piece. The engaging lug 8 is hinged to the adaptor 3, that is, after the adaptor 3 is connected to the flange 11 of the canned motor pump main body 1, the two semi-cylindrical shells 4 can rotate relative to the canned motor pump main body 1. Make two semi-cylindrical shells 4 separation earlier, dismantle remaining first fastener in the flange 11 of canned motor pump main part 1, rethread hoist (prior art) lifts by crane canned motor pump main part 1, slowly rotates two semi-cylindrical shells 4 inwards simultaneously, and when canned motor pump main part 1 and the pump body completely separate, two semi-cylindrical shells 4 are also tentatively laminated, cover canned motor pump impeller 2.

The outer edge and the inner edge of the fan-shaped sheet 4-3 are respectively connected with the end parts of the connecting shell 4-1 and the shielding shell 4-2 which are close to each other, and a plurality of second through holes 4-31 matched with the first through holes are arranged. Namely, when the above-mentioned "two semi-cylindrical shells 4 are also preliminarily attached", the second through holes 4 to 31 and the first through holes are exactly aligned one by one.

Referring to fig. 3, in one embodiment, the adaptor 3 is preferably configured to: comprises a fixed part 3-1, a moving part 3-2 and a spring 3-3; the fixing part 3-1 is used for being inserted and fixed in the first through hole, and after the fixing part 3-1 and the first through hole are connected, the inserting column 3-1-21 on the fixing part 3-1 also exceeds the flange 11 of the shielding pump main body 1; the movable part 3-2 is axially connected to the fixed part 3-1 in a sliding mode along the shielding pump, specifically, the fixed part 3-1 can be concave and comprises two side edge blocks 3-1-1 and a bottom block 3-1-2 which are inverted concave, sliding blocks matched with notches of the side edge blocks 3-1-1 are integrally arranged on two sides of the movable part 3-2, the side edge blocks 3-1-1 and the bottom block 3-1-2 are assembled through a second fastening piece to form the fixed part 3-1, and meanwhile, the movable part 3-2 is connected in a sliding mode; the spring 3-3 is arranged between the fixed part 3-1 and the moving part 3-2, so that the moving part 3-2 is far away from the fixed part 3-1, specifically, a blind hole matched with the spring 3-3 can be arranged on the bottom surface of the moving part 3-2, one end of the spring 3-3 is inserted into the blind hole, and the other end of the spring 3-3 props against the fixed part 3-1; the above-mentioned engaging lug 8 is hinged to the moving part 3-2, i.e. the half-cylinder housing 4 can rotate relative to the canned motor pump body 1 and can slide relative to the canned motor pump body 1.

Referring to fig. 4 and 5, before "slowly rotate the two half cylinder shells 4 inward", the two moving parts 3-2 are pressed downward against the springs 3-3 to move the two half cylinder shells 4 downward by a distance, and the length of the distance and the length of the excess part of the insert post 3-1-21 are controlled so that the excess part of the insert post 3-1-21 does not interfere with the rotation of the half cylinder shells 4. After the two semi-cylindrical shells 4 rotate to be preliminarily attached, the two moving parts 3-2 are reset under the action of the springs 3-3, and meanwhile, the two second through holes 4-31 corresponding to the two semi-cylindrical shells 4 are sleeved in the exceeding parts of the inserting columns 3-1-21. In this way, the adaptor 3 according to the above arrangement has the advantages of: the two semi-cylindrical shells 4 are preliminarily limited by the springs 3-3 matched with the inserting columns 3-1-21, so that the rotation of the semi-cylindrical shells is limited, and the subsequent operation is more convenient.

Compared with the connecting shell 4-1, the inner diameter and the outer diameter of the shielding shell 4-2 are smaller, the concave edge of the shielding shell is integrally provided with an extending piece 4-21 outwards, and two ends of the extending piece 4-21 are connected with two ends of the fan-shaped piece 4-3. The extension piece 4-21 is used for matching with the fan-shaped piece 4-3 and is provided with a first sealing ring 5 and a second sealing ring 6.

Referring to fig. 2, 6 and 7, the first seal ring 5 and the second seal ring 6 are respectively embedded in the segment 4-3 and the extension piece 4-21 of the two semi-cylindrical shells 4 in a staggered manner. Namely, for one semi-cylindrical shell 4, the fan-shaped piece 4-3 is provided with an inner semi-cylindrical embedded groove 4-32 (at the inner side of the second through hole 4-31), and the extension piece 4-21 is provided with an inner concave embedded groove 4-211; for the other semi-cylindrical shell 4, the fan-shaped piece 4-3 is provided with an outer semi-cylindrical embedded groove 4-33 (also arranged at the inner side of the second through hole 4-31), and the extending piece 4-21 is provided with an outer concave embedded groove 4-212; the first sealing ring 5 is embedded in the inner semicircular embedded groove 4-32 and the inner concave embedded groove 4-211, the second sealing ring 6 is embedded in the outer semicircular embedded groove 4-33 and the outer concave embedded groove 4-212, the depth of all the embedded grooves is set, and part of the embedded parts of the first sealing ring 5 and the second sealing ring 6 exceeds; after the two semi-cylindrical shells 4 rotate to the primary fitting, the first sealing ring 5 is positioned on the inner side of the second sealing ring 6, and the staggering effect is achieved.

Referring to fig. 8, in a state where the two half cylinder shells 4 rotate to abut against each other and cover the impeller 2 of the shield pump, the mounting ring 7 is sleeved on the shield shell 4-2, and is provided with a plurality of threaded holes 72 that are matched with the first through holes and the second through holes 4-31 (in this state, the first through holes and the second through holes 4-31 are aligned one by one), and two limiting grooves 71 that are matched with the extending pieces 4-21 are formed in the inner wall of the mounting ring. Therefore, the positioning of the mounting ring 7 can be quickly completed through the two limiting grooves 71 and the extending pieces 4 to 21, so that the threaded hole 72 corresponds to the first through hole and the second through hole 4 to 31; after the half-cylindrical shell is sleeved in the mounting ring 7, except for the first through holes into which the two adapters 3 are inserted, the half-cylindrical shell penetrates through the rest first through holes and the rest second through holes 4-31 through bolts (which can be bolts in the first fastening piece originally detached from the shield pump) and is in threaded connection with the threaded holes 72 and is screwed down, and the first sealing strip and the second sealing strip between the two half-cylindrical shells 4 and the flange 11 are extruded, so that the connection and the sealing between the two half-cylindrical shells 4 and the flange 11 are primarily completed; and then the connection between the connecting lugs 8 and the semi-cylindrical shells 4 is released, the two adapter pieces 3 are pulled out, and the connection and the sealing between the two semi-cylindrical shells 4 and the flange 11 are completed through bolts.

In one embodiment, the outer wall of the shielding shell 4-2 is preferably inclined, and the closer to the connecting shell 4-1, the larger the outer diameter thereof, the inner wall of the mounting ring 7 is also in a matching inclined state; the outer side surfaces of the two vertical parts of the extending pieces 4-21 are in an inclined state, the thickness of the extending pieces is thicker as the extending pieces are closer to the connecting shell 4-1, and the two side walls 711 of the limiting groove 71 are also in a matched inclined state. Thus, the mounting ring 7 can be more quickly and conveniently initially nested into the two semi-cylindrical shells 4.

When the mounting ring 7 is sleeved on the shielding shell 4-2 and abuts against the segment 4-3 (after the connection and the sealing between the two semi-cylindrical shells 4 and the flange 11 are completed, the mounting ring 7 naturally abuts against the segment 4-3), the two extending pieces 4-21 are kept attached through the inner wall of the mounting ring 7 and/or the two side walls 711 of the limiting groove 71, and the parts, corresponding to the extending pieces 4-21, of the first sealing ring 5 and the second sealing ring 6 are extruded, so that the connection and the sealing between the two semi-cylindrical shells 4 are completed.

It is considered that the portions of the second gasket 6 corresponding to the extension pieces 4-21 are pressed in order to squeeze the first gasket 5. Therefore, preferably, when the mounting ring 7 is sleeved on the shielding shell 4-2 and abuts against the segment 4-3, the two side walls 711 of the limiting groove 71 are selected to abut against the extending parts of the two shielding shells 4-2, and the parts of the first sealing ring 5 and the second sealing ring 6 corresponding to the extending parts 4-21 are pressed. This ensures a connection, a sealing effect, and a convenient machining of the mounting ring 7.

Referring to fig. 9, in an embodiment, the fastening device further includes a fastening strip 9, the fastening strip 9 is provided with a fastening groove 91 for fastening the horizontal portions of the two extending pieces 4 to 21, two ends of the fastening strip 9 both exceed the horizontal portions of the extending pieces 4 to 21, and a third fastening member 10 is provided. Only the mounting ring 7 is used for completing the connection and sealing between the two semi-cylindrical shells 4, the mounting ring 7 needs to have a certain thickness, and after the clamping strip 9 is additionally arranged, correspondingly, the mounting ring 7 can be thinner, and the connection and sealing between the two semi-cylindrical shells 4 are completed from the two ends of the two extending pieces 4-21 by matching with the clamping strip 9.

In addition, the operations mentioned above, such as slowly rotating the two half-cylinder shells 4 inwards, pressing the two moving parts 3-2 downwards, sleeving the mounting ring 7, etc., are performed manually or in cooperation with tools, power source parts and equipment according to the specific size of the shielding pump and actual conditions.

Claims (5)

1. The utility model provides an impeller shield section of thick bamboo of nuclear power canned motor pump which characterized in that includes:

the two adapters (3) are respectively used for being inserted and fixed into two opposite first through holes in a flange (11) of the shielding pump main body (1);

the shielding device comprises two semi-cylindrical shells (4), wherein each semi-cylindrical shell (4) comprises a connecting shell (4-1), a shielding shell (4-2) and a fan-shaped sheet (4-3) which are integrally arranged; the inner diameter and the outer diameter of the connecting shell (4-1) are larger, and the inner wall of the connecting shell is detachably connected with a connecting lug (8) hinged to the adapter (3); the outer edge and the inner edge of the fan-shaped sheet (4-3) are respectively connected with the end parts, close to each other, of the connecting shell (4-1) and the shielding shell (4-2), and a plurality of second through holes (4-31) matched with the first through holes are formed; the inner diameter and the outer diameter of the shielding shell (4-2) are smaller, extension pieces (4-21) are further integrally arranged outwards along the concave edges of the shielding shell, and two ends of each extension piece (4-21) are connected to two ends of the fan-shaped pieces (4-3);

the first sealing ring (5) and the second sealing ring (6) are respectively embedded in the fan-shaped sheets (4-3) and the extending sheets (4-21) of the two semi-cylindrical shells (4) in a staggered manner;

the mounting ring (7) is sleeved on the shielding shell (4-2) in a state that the two semi-cylindrical shells (4) rotate to abut against each other to cover the shielding pump impeller (2), a plurality of threaded holes (72) matched with the first through holes and the second through holes (4-31) are formed in the mounting ring (7), and two limiting grooves (71) matched with the extending pieces (4-21) are formed in the inner wall of the mounting ring.

2. Impeller shielding cartridge of a nuclear power canned pump according to claim 1, characterized in that each adaptor (3) comprises:

the fixing part (3-1) is used for being fixedly inserted into the first through hole, and after the fixing part (3-1) and the first through hole are connected, the inserting column (3-1-21) on the fixing part (3-1) further exceeds the flange (11) of the shield pump main body (1);

the moving part (3-2), the moving part (3-2) is connected to the fixed part (3-1) in a sliding mode along the axial direction of the canned motor pump, and the connecting lug (8) is hinged to the moving part (3-2);

a spring (3-3), the spring (3-3) is arranged between the fixed part (3-1) and the moving part (3-2) to enable the moving part (3-2) to be far away from the fixed part (3-1).

3. The impeller shielding cylinder of the nuclear power shielding pump according to claim 1, characterized in that the outer wall of the shielding shell (4-2) is in an inclined state, and the larger the outer diameter of the shielding shell is, the closer to the connecting shell (4-1), the inner wall of the mounting ring (7) is also in a matched inclined state; the outer side surfaces of the two vertical parts of the extending pieces (4-21) are in an inclined state, the thickness of the extending pieces is thicker as the extending pieces are closer to the connecting shell (4-1), and the two side walls (711) of the limiting groove (71) are also in a matched inclined state.

4. The impeller shielding cylinder of the nuclear power shielding pump as claimed in claim 1, wherein when the mounting ring (7) is sleeved on the shielding shells (4-2) and abuts against the segments (4-3), the limiting groove (71) abuts against the extending portions of the two shielding shells (4-2) to press the portions of the first sealing ring (5) and the second sealing ring (6) corresponding to the extending segments (4-21).

5. The impeller shielding cylinder of the nuclear power shielding pump as claimed in claim 1, further comprising a clamping strip (9), wherein the clamping strip (9) is provided with a clamping groove (91) for clamping the horizontal portions of the two extension pieces (4-21), two ends of the clamping strip (9) both exceed the horizontal portions of the extension pieces (4-21), and a third fastening piece (10) is arranged.

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