Auxiliary installation device for cooling water jacket of main feed water pump of nuclear power plant

Abstract

The application discloses a kind of nuclear power plant main feed water pump cooling water jacket auxiliary installation device, comprising: press into disc, side is equipped with multiple first assembly holes;Mounting disc, mounting disc includes mounting disc body and multiple assembly ears extending from the end side of mounting disc body, multiple second assembly holes are equipped on the side of mounting disc body, the opening position of multiple second assembly holes and the opening position of multiple first assembly holes one-to-one adaptation corresponding;And multiple depth adjusting members are assembled between multiple second assembly holes and multiple first assembly holes.The nuclear power plant main feed water pump cooling water jacket auxiliary installation device of the application can quickly install the cooling water jacket to the specified position, instead of hand push installation or mechanical seal press-in installation;Reasonable structure, light weight, easy to maintain and maintain.

Description

Auxiliary installation device for cooling water jacket of main feedwater pump in nuclear power plant Technical Field

[0001] This invention relates to the field of nuclear power plant equipment installation technology, and in particular to an auxiliary installation device for the cooling water jacket of the main feedwater pump in a nuclear power plant. Background Technology

[0002] In the existing technology, during the installation of the cooling water jacket of the electric main feedwater pump in a nuclear power plant, there are no special installation tools. The common methods are manual installation or pressing in the mechanical seal shell, which results in poor installation accuracy, heavy mechanical seals, and easy damage to the equipment. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an auxiliary installation device for the cooling water jacket of the main feedwater pump of a nuclear power plant, which can quickly install the cooling water jacket to the specified position to replace manual installation or mechanical seal press-in installation; the device has a reasonable structure, is lightweight, and is easy to repair and maintain.

[0004] To address the aforementioned technical problems, embodiments of the present invention provide an auxiliary installation device for the cooling water jacket of a nuclear power plant main feedwater pump, used to install the cooling water jacket to a predetermined position in the pump cavity. The device includes: a pressing plate, which is an annular structure with a first through hole in the center and multiple first mounting holes on its sides; and an mounting plate, which includes a mounting plate body and multiple mounting ears extending outward from the end side of the mounting plate body. The mounting plate body is an annular structure with a second through hole in the center and multiple second mounting holes on its sides. The positions of the multiple second mounting holes correspond to the positions of the multiple first mounting holes. A matching pair is provided; the mounting ears are respectively provided with multiple third mounting holes for fastening the mounting plate to the pump body; and multiple depth adjustment components are assembled between multiple second mounting holes and multiple first mounting holes, wherein: the depth of the depth adjustment component in the first mounting hole and / or the second mounting hole is changed to adjust the parallelism and distance between the mounting plate and the pressing plate; the mounting plate is pushed, and the multiple depth adjustment components and the pressing plate are linked to press the cooling water jacket against the bottom of the pump cavity; the bolt passes through the third mounting hole to fasten the mounting plate to the pump body; and the multiple depth adjustment components and the pressing plate assemble the cooling water jacket in the specified position of the pump cavity.

[0005] The outer end face size of the pressure plate is consistent with the outer end face size of the cooling water jacket, and the inner diameter of the first through hole is larger than the outer diameter of the pump shaft.

[0006] Among them, the multiple first assembly holes are screw holes, and the multiple first assembly holes are evenly spaced.

[0007] Among them, the multiple second assembly holes are screw holes, and the multiple second assembly holes are evenly spaced.

[0008] The depth adjustment component is a screw. By adjusting the screw's insertion depth in the first and second assembly holes, the parallelism and distance between the pressing plate and the mounting plate can be adjusted.

[0009] The mounting ear and the mounting plate body are located on the same plane; an oblong hole is provided between the mounting ear and the mounting plate body.

[0010] The mounting ears are evenly spaced and equidistant; the mounting plate is both axisymmetric and centrally symmetric.

[0011] The mounting plate, multiple depth adjustment components, and pressing plate are detachable structures.

[0012] The auxiliary installation device for the cooling water jacket of the main feedwater pump in a nuclear power plant provided by this invention has the following advantages: it changes the depth of the depth adjustment component assembled in the first and / or second assembly holes, adjusting the parallelism and distance between the mounting plate and the pressing plate; it pushes the mounting plate and, in conjunction with multiple depth adjustment components and the pressing plate, presses the cooling water jacket to the bottom of the pump cavity; bolts pass through the third assembly hole to fasten the mounting plate to the pump body; and multiple depth adjustment components and the pressing plate assemble the cooling water jacket in the specified position in the pump cavity, enabling the cooling water jacket to be quickly installed in the specified position, replacing manual push installation or mechanical seal press-in installation; it has a reasonable structure, is lightweight, and is easy to repair and maintain. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 is a top view of the pressurization plate of the auxiliary installation device for the cooling water jacket of the main feedwater pump in this embodiment of the nuclear power plant.

[0015] Figure 2 is a top view of the mounting plate of the auxiliary installation device for the cooling water jacket of the main feedwater pump in this embodiment of the nuclear power plant.

[0016] Figure 3 is a schematic diagram of the assembly structure of the auxiliary installation device for the cooling water jacket of the main feedwater pump of the nuclear power plant in this embodiment. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Figures 1-3 show an embodiment of the auxiliary installation device for the cooling water jacket of the main feedwater pump in a nuclear power plant according to the present invention.

[0019] The auxiliary installation device for the cooling water jacket of the main feedwater pump in this embodiment is used to install the cooling water jacket to a specified position in the pump cavity. The main feedwater pump is an electric main feedwater pump with a cylindrical design. A cooling water jacket is installed between the impeller and the mechanical seal, and cooling water flows through it.

[0020] It includes: a pressing plate 1, which is an annular structure with a first through hole 11 in the center and a plurality of first mounting holes 12 on its side; and a mounting plate 2, which includes a mounting plate body 21 and a plurality of mounting ears 22 extending outward from the end side of the mounting plate body 21. The mounting plate body 21 is an annular structure with a second through hole 211 in the center and a plurality of second mounting holes 212 on its side. The opening positions of the plurality of second mounting holes 212 correspond one-to-one with the opening positions of the plurality of first mounting holes 12. For example, in this embodiment, four first mounting holes 12 are evenly spaced on the side of the pressing plate 1. Similarly, four second mounting holes 212 are also opened on the side of the mounting plate body 21.

[0021] In this embodiment, the pressing plate 1 is a hollow annular structure, and the outer end face size of the pressing plate 1 is consistent with the outer end face size of the cooling water jacket 3. This allows the cooling water jacket 3 to be pressed parallel to the bottom of the pump chamber during installation, preventing jamming or other assembly issues. In this embodiment, the four first mounting holes 12 are screw holes, and the multiple first mounting holes 12 are evenly spaced to ensure uniform thrust on the pressing plate surface when it is pushed in, preventing tilting.

[0022] The function of the first through hole 11 in the middle of the pressing plate 1 is to allow the pump shaft to pass through. In this embodiment, the inner diameter of the first through hole 11 is set to be larger than the outer diameter of the pump shaft to meet the installation and pushing requirements.

[0023] Furthermore, the function of the mounting plate 2 is to link the pressing plate 1 to install the cooling water jacket to the specified position in the pump cavity. Since the assembly of the cooling water jacket requires a certain degree of precision and dimensional requirements, the mounting plate 2 also needs to be assembled to the corresponding position in the pump body so that the pressing plate 1 can assemble the cooling water jacket to the specified position.

[0024] The mounting plate 2 includes a mounting plate body 21 and a plurality of mounting ears 22 extending outward from the end side of the mounting plate body 21. The mounting plate body 21 is an annular structure with a second through hole 211 in the middle, and a plurality of second mounting holes 212 are provided on its side. The opening positions of the plurality of second mounting holes 212 are adapted to correspond to the opening positions of the plurality of first mounting holes 12, so that the press-in plate 1 and the mounting plate 2 can be connected by a plurality of depth adjustment members 4.

[0025] The mounting plate body 21 is provided with a second through hole 211, which can reduce the weight of the auxiliary installation device for the cooling water jacket of the main feedwater pump of the nuclear power plant and make it easier for manual disassembly and assembly.

[0026] The function of the mounting ear 22 is to assemble the mounting plate 2 to the corresponding position on the pump body so that the pressure plate 1 can be assembled with the cooling water jacket and installed to the specified position. In this embodiment, the mounting ear 22 is provided with a plurality of third mounting holes 222 for fastening the mounting plate 2 to the pump body; the bolt 5 passes through the third mounting holes 222 and is assembled to the corresponding position on the pump body so that the mounting plate 2 can push the pressure plate 1 to the specified position.

[0027] Preferably, the multiple second assembly holes 212 are screw holes, and the multiple second assembly holes 212 are evenly spaced to prevent jamming or other assembly problems when the mounting plate body 21 is pushed in.

[0028] Furthermore, it also includes: multiple depth adjustment components 4 assembled between multiple second mounting holes 212 and multiple first mounting holes 12, which in this embodiment are four screws.

[0029] In practice, the screwing depth of the depth adjustment component 4 in the first mounting hole 12 and / or the second mounting hole 212 is changed to adjust the parallelism and distance between the mounting plate 2 and the pressing plate 1; the mounting plate 2 is pushed, and multiple depth adjustment components 4 and pressing plate 1 are linked to press the cooling water jacket 3 against the bottom of the pump chamber A; the bolt 5 passes through the third mounting hole 222 to fasten the mounting plate 2 to the pump body; and multiple depth adjustment components 4 and pressing plate 1 assemble the cooling water jacket 3 in the specified position of the pump chamber A.

[0030] Preferably, the mounting ear 22 and the mounting plate body 21 are located on the same plane; a waist-shaped hole 23 is provided between the mounting ear 22 and the mounting plate body 21. The purpose of setting the mounting ear 22 and the mounting plate body 21 on the same plane and providing the waist-shaped hole 23 is to further reduce the weight of the auxiliary installation device for the cooling water jacket of the main feedwater pump of the nuclear power plant by adopting a block structure and providing hollowing in some areas.

[0031] Preferably, the multiple mounting ears 22 are evenly spaced; the mounting plate 2 has an axisymmetric and a centrally symmetrical structure. This facilitates processing and cost control.

[0032] Preferably, the mounting plate 2, multiple depth adjustment components 4 and the pressing plate 1 are detachable structures. The purpose of this arrangement is that after the cooling water jacket is installed to the specified position in the pump cavity, it can be quickly removed according to actual use needs, thereby improving the efficiency of assembly and installation and the assembly of subsequent structural components.

[0033] In the specific implementation of the auxiliary installation device for the cooling water jacket of the main feedwater pump in a nuclear power plant, the two ends of the adjusting screw 4 are respectively assembled and installed with the pressing plate 1 and the mounting plate 2. By adjusting the screw 4 in the first mounting hole 11 and the second mounting hole 212 respectively, the parallelism and distance between the pressing plate 1 and the mounting plate 2 are adjusted. After adjusting the entire device according to the actual size of the pump cavity A, the cooling water jacket 3 is first installed on the outer edge of the pump cavity A. Then, the pressing plate 1, the adjusting screw 4 and the mounting plate 2 are pressed in. After the cooling water jacket 3 is pressed into the pump cavity A, the bolt 5 passes through the third mounting hole 222 to fasten the mounting plate 2 to the pump body. Multiple depth adjusting parts 4 and the pressing plate 1 continue to assemble the cooling water jacket 3 in the specified position of the pump cavity A.

[0034] Finally, the auxiliary installation device for the cooling water jacket of the main feed water pump can be removed according to actual usage needs, which can improve the efficiency of assembly and installation as well as the assembly of subsequent structural components.

[0035] The auxiliary installation device for the cooling water jacket of the main feedwater pump in a nuclear power plant according to the present invention has the following beneficial effects: The auxiliary installation device for the cooling water jacket of the main feedwater pump in a nuclear power plant includes: a pressing plate, which has a plurality of first mounting holes on its side; a mounting plate, which includes a mounting plate body and a plurality of mounting ears extending outward from the end side of the mounting plate body, and a plurality of second mounting holes on the side side of the mounting plate body, the opening positions of the plurality of second mounting holes being adapted to correspond one-to-one with the opening positions of the plurality of first mounting holes; and a plurality of deep mounting holes fitted between the plurality of second mounting holes and the plurality of first mounting holes. The depth adjustment component changes the depth of the depth adjustment component installed in the first and / or second mounting holes, adjusting the parallelism and distance between the mounting plate and the pressing plate. Pushing the mounting plate, along with multiple depth adjustment components and the pressing plate, presses the cooling water jacket to the bottom of the pump chamber. Bolts pass through the third mounting hole to fasten the mounting plate to the pump body. Multiple depth adjustment components and the pressing plate assemble the cooling water jacket into the specified position within the pump chamber, enabling rapid installation of the cooling water jacket to the designated position, replacing manual push installation or mechanical seal press-fit installation. The structure is reasonable, lightweight, and easy to repair and maintain.

Claims

1. An auxiliary installation device for the cooling water jacket of a main feedwater pump in a nuclear power plant, used to install the cooling water jacket to a predetermined position in the pump chamber, characterized in that, include: The pressing plate is an annular structure with a first through hole in the center and multiple first mounting holes on its sides; the mounting plate includes a mounting plate body and multiple mounting ears extending outward from the end side of the mounting plate body. The mounting plate body is an annular structure with a second through hole in the center and multiple second mounting holes on its sides. The opening positions of the multiple second mounting holes correspond one-to-one with the opening positions of the multiple first mounting holes; each mounting ear has multiple third mounting holes for fastening the mounting plate to the pump body. The device includes multiple depth adjustment components assembled between multiple second mounting holes and multiple first mounting holes, wherein: the depth of the depth adjustment components assembled in the first mounting holes and / or the second mounting holes is changed to adjust the parallelism and distance between the mounting plate and the pressing plate; the mounting plate is pushed, and the multiple depth adjustment components and the pressing plate are linked to press the cooling water jacket against the bottom of the pump cavity; bolts pass through the third mounting hole to fasten the mounting plate to the pump body; and the multiple depth adjustment components and the pressing plate assemble the cooling water jacket at a specified position in the pump cavity.

2. The auxiliary installation device for the cooling water jacket of the main feedwater pump in a nuclear power plant as described in claim 1, characterized in that, The outer end face size of the pressure plate is consistent with the outer end face size of the cooling water jacket, and the inner diameter of the first through hole is larger than the outer diameter of the pump shaft.

3. The auxiliary installation device for the cooling water jacket of the main feedwater pump in a nuclear power plant as described in claim 2, characterized in that, The plurality of first assembly holes are screw holes, and the plurality of first assembly holes are evenly spaced.

4. The auxiliary installation device for the cooling water jacket of the main feedwater pump in a nuclear power plant as described in claim 1, characterized in that, The plurality of second assembly holes are screw holes, and the plurality of second assembly holes are evenly spaced.

5. The auxiliary installation device for the cooling water jacket of the main feedwater pump in a nuclear power plant as described in claim 1, characterized in that, The depth adjustment component is a screw. By adjusting the screw's insertion depth in the first and second assembly holes, the parallelism and distance between the press-in plate and the mounting plate can be adjusted.

6. The auxiliary installation device for the cooling water jacket of the main feedwater pump in a nuclear power plant as described in claim 1, characterized in that, The mounting ear and the mounting plate body are located on the same plane; an oblong hole is provided between the mounting ear and the mounting plate body.

7. The auxiliary installation device for the cooling water jacket of the main feedwater pump in a nuclear power plant as described in claim 6, characterized in that, The plurality of mounting ears are evenly spaced and arranged at equal intervals; the mounting plate is an axisymmetric and centrally symmetric structure.

8. The auxiliary installation device for the cooling water jacket of the main feedwater pump in a nuclear power plant as described in claim 1, characterized in that, The mounting plate, the plurality of depth adjustment components, and the pressing plate are detachable structures.

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