Nuclear power plant drum net operation device

Abstract

The utility model discloses a drum net running device for a nuclear power plant. The drum net running device comprises a mounting bracket, a lifting bracket, a lifting adjusting assembly and a transmission assembly, the drum net running device of the nuclear power plant is fixedly mounted on a field base structure through a fastener, the lifting support is guided by the mounting support, and lifting adjustment of the lifting support is completed through the lifting adjusting assembly, so that the meshing gap between the transmission assembly and a gear ring of a drum net is adjusted, effective meshing of the transmission assembly and the gear ring of the drum net is guaranteed, and the drum net running efficiency is improved. Personnel are effectively prevented from entering the drum net, the operation risk is reduced, operation of the drum net is directly completed through the drum net operation device of the nuclear power plant, the working safety is improved, the working efficiency and stability are also improved, and the maintenance cost during overhaul of a unit is saved.

Description

Technical Field

[0001] This utility model relates to the field of mechanical maintenance in nuclear power plants, and in particular to a drum grid operation device for nuclear power plants. Background Technology

[0002] The drum screen is approximately 20 meters in diameter. During equipment shutdown and maintenance, the drum screen needs to be operated to facilitate maintenance. The original method required at least 6 people to enter the drum screen and operate it manually, with about 4 people assisting at the locking point and on both sides of the drum screen's main shaft. Personnel information was communicated via walkie-talkie. During operation, there are risks such as slipping and falling and being cut by the rake teeth, stepping on the screen and damaging the equipment, falling, and personal injury caused by abnormal equipment rotation. At the same time, there is also a risk of hand injuries when disassembling and assembling the locking robotic arm, making the operation extremely risky. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a nuclear power plant drum grid operation device.

[0004] The technical solution adopted by this utility model to solve its technical problem is: to construct a nuclear power plant drum grid operation device, which includes a mounting bracket, a lifting bracket, a lifting adjustment component and a transmission component;

[0005] The mounting bracket is installed on the field base structure by multiple fasteners;

[0006] The lifting bracket is movably connected to the mounting bracket, and the lifting bracket can move along the height direction of the mounting bracket;

[0007] The lifting adjustment component is mounted on the mounting bracket and connected to the lifting bracket. The lifting adjustment component is used to drive the lifting bracket and the transmission component to perform lifting movements.

[0008] The transmission component is mounted on the lifting bracket and is connected to the gear ring of the drum mesh. The transmission component is used to drive the drum mesh to move or to stop the drum mesh from moving.

[0009] In some embodiments, the mounting bracket includes a support base plate, a first connecting beam, a second connecting beam, a third connecting beam, a fourth connecting beam, and a guide beam;

[0010] The fasteners are mounted on the support base plate, and the first connecting beam is connected to the support base plate;

[0011] The first connecting beam, the second connecting beam, the third connecting beam, and the fourth connecting beam are connected in sequence to form a rhombus structure;

[0012] The guide beam is connected to the third connecting beam and the first connecting beam, and is used to provide guidance for the movement of the lifting support.

[0013] In some embodiments, the support base plate has a plurality of connection adjustment holes.

[0014] In some embodiments, the nuclear power plant drum grid operation device further includes a plurality of rollers mounted on the first connecting beam.

[0015] In some embodiments, the lifting adjustment assembly includes a lifting connecting rod mounted on the third connecting beam and a lifting adjustment member connected to a first end of the lifting connecting rod, wherein a second end of the lifting connecting rod is connected to the lifting bracket.

[0016] In some embodiments, the lifting connecting rod is a lead screw, and the lifting adjustment component is a handwheel.

[0017] In some embodiments, the transmission assembly includes an electric reducer and a transmission gear connected to the output end of the electric reducer, the transmission gear being drivenly connected to the gear ring of the drum mesh.

[0018] In some embodiments, the electric speed reducer is a multi-stage worm gear reducer or a planetary speed reducer.

[0019] In some embodiments, the nuclear power plant drum grid operation device further includes a frequency converter and a controller. The frequency converter is used to adjust the speed of the electric reducer, and the controller is provided with a forward rotation button, a reverse rotation button, and a stop button.

[0020] In some embodiments, the fastener is an anchor bolt.

[0021] The implementation of this utility model has the following beneficial effects: The nuclear power plant drum screen operation device is fixed to the on-site base structure by fasteners, and the lifting bracket is guided by the installation bracket. The lifting bracket is adjusted by the lifting adjustment component, thereby adjusting the meshing gap between the transmission component and the gear ring of the drum screen, ensuring effective meshing between the transmission component and the gear ring of the drum screen, effectively preventing personnel from entering the inside of the drum screen, reducing operational risks. The operation of the drum screen is directly completed by the nuclear power plant drum screen operation device, improving work safety, work efficiency and stability, and saving maintenance costs during unit overhaul. Attached Figure Description

[0022] To more clearly illustrate the technical solution of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show some embodiments of this utility model and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort. In the drawings:

[0023] Figure 1This is a front view structural diagram of the nuclear power plant drum grid operation device in some embodiments of this utility model;

[0024] Figure 2 This is a side view of the nuclear power plant drum grid operation device in some embodiments of this utility model;

[0025] Figure 3 yes Figure 1 A structural diagram from the perspective of AA;

[0026] Figure 4 This is a schematic diagram of the control system of the nuclear power plant grid operation device in some embodiments of this utility model. Detailed Implementation

[0027] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0028] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0029] Please see Figures 1 to 4This invention relates to a nuclear power plant drum screen operation device in some embodiments, which can be used for rotating or locking the drum screen. The nuclear power plant drum screen operation device includes a mounting bracket 1, a lifting bracket 2, a lifting adjustment component 3, and a transmission component 4. The mounting bracket 1 is mounted on the on-site base structure by multiple fasteners 5; the lifting bracket 2 is movably connected to the mounting bracket 1 and can move along the height direction of the mounting bracket 1; the lifting adjustment component 3 is mounted on the mounting bracket 1 and connected to the lifting bracket 2, and is used to drive the lifting bracket 2 and the transmission component 4 to perform lifting and lowering movements; the transmission component 4 is mounted on the lifting bracket 2 and is connected to the gear ring of the drum screen 9, and is used to drive the drum screen 9 to move or stop the drum screen 9 from moving. Specifically, the mounting bracket 1 is installed on the concrete floor of the inspection room of the sea-facing side of the grate 9. The fastener 5 is an anchor bolt, which is a fastener 5 used to anchor components to a concrete substrate. It usually consists of a head and a threaded rod and needs to be used in conjunction with a nut. The anchor bolt fixes the component in the concrete through mechanical locking or chemical adhesive and is suitable for various building reinforcement and installation needs. The mounting bracket 1 provides guidance for the movement of the lifting bracket 2, and the lifting bracket 2 provides positioning for the transmission component 4.

[0030] Understandably, the nuclear power plant's drum screen operation device is fixed to the on-site base structure by fasteners 5, while the lifting bracket 2 is guided by the mounting bracket 1. The lifting and adjusting component 3 completes the lifting and adjusting of the lifting bracket 2, thereby adjusting the meshing gap between the transmission component 4 and the gear ring of the drum screen 9, ensuring effective meshing between the transmission component 4 and the gear ring of the drum screen 9, effectively preventing personnel from entering the interior of the drum screen 9, reducing operational risks. The operation of the drum screen 9 is directly completed by the nuclear power plant's drum screen operation device, improving work safety, work efficiency and stability, and saving maintenance costs during unit overhauls.

[0031] like Figure 1As shown, the mounting bracket 1 includes a support base plate 11, a first connecting beam 12, a second connecting beam 13, a third connecting beam 14, a fourth connecting beam 15, and a guide beam 18. Fasteners 5 are installed on the support base plate 11. The first connecting beam 12 is connected to the support base plate 11. The first connecting beam 12, the second connecting beam 13, the third connecting beam 14, and the fourth connecting beam 15 are connected sequentially to form a rhombus structure. More specifically, the first connecting beam 12 and the third connecting beam 14 are arranged parallel to each other, and the second connecting beam 13 and the fourth connecting beam 15 are arranged parallel to each other. The first connecting beam 12, the second connecting beam 13, the third connecting beam 14, and the fourth connecting beam 15 can be connected sequentially by welding. The rhombus structure increases the strength and stability of the mounting bracket 1. The guide beam 18 is connected to the third connecting beam 14 and the first connecting beam 12 and is used to guide the movement of the lifting bracket 2. The guide beam 18 has corresponding slots that match the side of the lifting bracket 2 so that the lifting bracket 2 can only move along the height direction of the mounting bracket 1.

[0032] like Figure 3 As shown, the supporting base plate 11 has multiple connecting adjustment holes 111. The connecting adjustment holes 111 are oblong holes, and fasteners 5 are installed on them. The connecting adjustment holes 111 solve the problem of hole positioning in the on-site base structure and also enable position adjustment. In addition, the nuclear power plant's drum grid operating device also includes multiple rollers 17 installed on the first connecting beam 12, facilitating the overall transport and installation of the nuclear power plant's drum grid operating device.

[0033] like Figure 1 and Figure 2 As shown, the lifting adjustment assembly 3 includes a lifting connecting rod 31 mounted on the third connecting beam 14 and a lifting adjustment component 32 connected to the first end of the lifting connecting rod 31. The second end of the lifting connecting rod 31 is connected to the lifting bracket 2. The lifting connecting rod 31 is a lead screw, and the lifting adjustment component 32 is a handwheel. The operator can adjust the meshing clearance between the transmission assembly 4 and the gear ring of the drum mesh 9 by turning the lifting adjustment component 32.

[0034] like Figures 1 to 3 As shown, the transmission assembly 4 includes an electric reducer 41 and a transmission gear 42 connected to the output end of the electric reducer 41. The transmission gear 42 is connected to the gear ring of the drum mesh 9. The electric reducer 41 is a multi-stage worm gear reducer or a planetary reducer. Specifically, the electric reducer 41 has a bore output, and its output end can be connected to the transmission gear 42 through a transmission shaft to simplify the transmission structure as much as possible and improve the transmission efficiency.

[0035] Combined Figure 4As shown, the nuclear power plant's grid operation device also includes a frequency converter 6 and a controller 7. The frequency converter 6 is used to adjust the speed of the electric reducer 41, and the controller 7 is equipped with forward rotation, reverse rotation, and stop buttons. The controller 7 can be a manual controller. More specifically, the nuclear power plant's grid operation device is controlled by a control cabinet, with wired operation. The control cabinet draws power from a field socket via a cable and plug 61, and also includes a circuit breaker 62 and a relay group 63. The circuit breaker can control the switching status of the power system according to operational needs, ensuring the normal operation of the power equipment. When a fault occurs in the power equipment or line, the circuit breaker trips quickly through the relay protection device. The relay group plays multiple important roles in the circuit, including automatic adjustment, safety protection, and circuit switching.

[0036] Furthermore, the electric reducer 41 and the control cabinet can be connected via plug 61 and socket. The control cabinet is connected to one or two controllers 7 via cables. Controllers 7 are equipped with forward rotation, reverse rotation, and stop buttons. The forward and reverse rotation operations are self-locking; when the electric reducer 41 is not powered, it brakes, locking the drum 9 and thus achieving the drum 9 locking function. The frequency converter 6 adjusts the speed of the electric reducer 41 by adjusting the frequency, thereby achieving adjustable operating speed and improving maintenance efficiency. Using the frequency converter 6, when the rotation starts, the control system automatically delays, and the motor output speed gradually increases from 0 to the set speed within 5-15 seconds. When the rotation stops, the motor output speed also gradually decreases from the set speed to 0 within 5-15 seconds to reduce impact on the drum 9 and other transmission components. Through the settings of the frequency converter 6 and controllers 7, one-button forward rotation, reverse rotation, and shutdown locking can be achieved, making operation simple.

[0037] Preferably, the mounting bracket 1 and the lifting bracket 2 are made of lightweight and corrosion-resistant aluminum, while the transmission gear 42 adopts a hollow design, which is a lightweight design that ensures the safety and functionality of the equipment.

[0038] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A nuclear power plant drum grid operation device, characterized in that, It includes a mounting bracket (1), a lifting bracket (2), a lifting adjustment assembly (3), and a transmission assembly (4); The mounting bracket (1) is mounted on the field base structure by a plurality of fasteners (5); The lifting bracket (2) is movably connected to the mounting bracket (1), and the lifting bracket (2) can move along the height direction of the mounting bracket (1); The lifting adjustment component (3) is installed on the mounting bracket (1) and connected to the lifting bracket (2). The lifting adjustment component (3) is used to drive the lifting bracket (2) and the transmission component (4) to perform lifting movements. The transmission component (4) is installed on the lifting bracket (2) and is connected to the gear ring of the drum mesh (9). The transmission component (4) is used to drive the drum mesh (9) to move or to stop the drum mesh (9) from moving.

2. The nuclear power plant grid operation device according to claim 1, characterized in that, The mounting bracket (1) includes a support base plate (11), a first connecting beam (12), a second connecting beam (13), a third connecting beam (14), a fourth connecting beam (15), and a guide beam (18); The fastener (5) is installed on the support base plate (11), and the first connecting beam (12) is connected to the support base plate (11); The first connecting beam (12), the second connecting beam (13), the third connecting beam (14), and the fourth connecting beam (15) are connected in sequence to form a rhomboid structure; The guide beam (18) is connected to the third connecting beam (14) and the first connecting beam (12) and is used to provide guidance for the movement of the lifting bracket (2).

3. The nuclear power plant grid operation device according to claim 2, characterized in that, The support base plate (11) is provided with multiple connection adjustment holes (111).

4. The nuclear power plant grid operation device according to claim 2, characterized in that, The nuclear power plant drum grid operation device also includes multiple rollers (17) installed on the first connecting beam (12).

5. The nuclear power plant grid operation device according to claim 2, characterized in that, The lifting adjustment assembly (3) includes a lifting connecting rod (31) installed on the third connecting beam (14) and a lifting adjustment component (32) connected to the first end of the lifting connecting rod (31). The second end of the lifting connecting rod (31) is connected to the lifting bracket (2).

6. The nuclear power plant grid operation device according to claim 5, characterized in that, The lifting connecting rod (31) is a lead screw, and the lifting adjusting component (32) is a handwheel.

7. The nuclear power plant grid operation device according to claim 2, characterized in that, The transmission assembly (4) includes an electric reducer (41) and a transmission gear (42) connected to the output end of the electric reducer (41). The transmission gear (42) is connected to the gear ring of the drum mesh (9).

8. The nuclear power plant grid operation device according to claim 7, characterized in that, The electric reducer (41) is a multi-stage worm gear reducer or a planetary reducer.

9. The nuclear power plant drum grid operation device according to claim 7, characterized in that, The nuclear power plant drum grid operation device also includes a frequency converter (6) and a controller (7). The frequency converter (6) is used to adjust the speed of the electric reducer (41). The controller (7) is equipped with a forward rotation button, a reverse rotation button and a stop button.

10. The nuclear power plant drum grid operation device according to claim 1, characterized in that, The fastener (5) is an anchor bolt.

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